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Mobile Phone Patent Abstract
Disclosed herein is a portable charger for a mobile phone. The portable
charger includes a front housing, a rear housing, a belt clip, a
fastening unit, a pair of clamps, a release button, an interface
connector, a secondary battery and a charge control unit. The portable
charger is easy to carry, can easily charge the battery of the mobile
phone with direct current power charged in a secondary battery,
and can simultaneously charge the secondary battery and the battery
of the mobile phone using a travel adaptor.
Mobile Phone Patent Claims
What is claimed is:
1. A portable charger for a mobile phone, comprising: a front housing
having an accommodation recess formed in a front side of the front
housing to accommodate a mobile phone, and cutouts formed on right
and left sides of an upper portion of the accommodation recess to
allow a user to easily grip the mobile phone seated in the accommodation
recess and easily manipulate a volume key of the mobile phone; a
rear housing fastened to a back of the front housing by screws to
close a rear open side of the front housing; a belt clip detachably
attached into a long accommodation recess formed on a back of the
rear housing to change a mounting position of the rear housing;
a fastening unit placed in the long accommodation recess formed
on the back of the rear housing to prevent the belt clip from being
removed from the accommodation recess; a pair of clamps rotatably
placed on right and left sidewalls of the accommodation recess formed
in the front housing to prevent the mobile phone from being removed
during charging while engaging with recesses formed on both sides
of the mobile phone, respectively; a release button placed above
a location between the front housing and the rear housing to regulate
protrusion and retraction of projections of the clamps; an interface
connector mounted in a lower portion of the accommodation recess,
formed in the front housing, through a shaft and a coil spring to
be rotated in a block; a secondary battery placed in a space formed
by the front and rear housings; and a charge control unit configured
to perform control so that Direct Current (DC) voltage, converted
by a travel adaptor, is received through a cord and a connector
and the second battery and the battery of the mobile phone are simultaneously
charged with the DC voltage, or the battery of the mobile phone
is charged with DC voltage charged in the secondary battery.
2. The portable charger for a mobile phone as set forth in claim
1, wherein the belt clip comprises: a coupling member having a pair
of projections formed on a top of the coupling member, and a recess
formed on a bottom of the coupling member to engage with a projection
of the fastening unit, so that the coupling member, which is placed
in the long accommodation recess formed on the back of the rear
housing, is fastened by the fastening unit; a rotating plate having
a pair of circular projections configured- to engage with a pair
of depressions formed on a circular projection of the coupling member,
and a coil spring configured to push a catch downward; a fastening
member integrated with the circular projection of the coupling member
using ultrasonic fusion welding to accommodate the rotating plate
so that the rotating plate can be rotated clockwise or counterclockwise;
a moving member mounted on the fastening member to be rotated around
a hinge pin; and a coil spring configured to push a low portion
of the moving member to a lower portion of the fastening member.
3. The portable charger for a mobile phone as set forth in claim
1, wherein the fastening unit comprises: a slider configured to
be pushed upward by a spring; a projection integrally formed on
a top of the slider to prevent removal of the belt clip while engaging
with the recess formed on the bottom of the coupling member of the
belt clip; and a projection plate integrally formed on the slider
to slide the slider downward to detach the belt clip from the rear
housing.
4. The portable charger for a mobile phone as set forth in claim
1, wherein the clamps comprise: a pair of projections placed on
both sidewalls of the accommodation recess, formed in the front
housing, to be selectively projected and retracted and to clamp
the mobile phone so as to prevent removal of the mobile phone seated
in the accommodation recess; a pair of coil springs mounted on shafts;
a pair of lower actuating members configured to be pushed inward
by the coil spring and protrude the projections when the release
button is pulled; and a pair of upper actuating levers mounted on
hinge shafts so that, when the release button is pushed, the upper
actuating levers come into contact with an inclined surface downwardly
formed from the bottom of the release button and are rotated outward,
thus retracting the projections.
5. The portable charger for a mobile phone as set forth in claim
1, wherein the release button is pushed by a coil spring so that
the projections of the clamps are pushed toward the accommodation
recess formed in the front housing.
6. The portable charger for a mobile phone as set forth in claim
1, wherein the charge control unit comprises: a microprocessor for
controlling an entire operation relating to charge of the battery
of the mobile phone and the secondary battery; voltage converting
means for receiving the DC power converted by the travel adaptor
and the DC power (DC current and DC voltage) charged in the secondary
battery, boosting or stepping down the DC power to charge the battery
of the mobile phone, and outputting the boosted or stepped-down
DC power to the microprocessor; first charging current detecting
means for receiving the DC power boosted or stepped-down by the
voltage converting means, detecting charging current, and outputting
the detected charging current to the microprocessor; first constant
current/voltage adjusting means for receiving the DC voltage boosted
or stepped-down by the voltage converting means and the charging
current detected by the first charging current detecting means,
performing operation on the DC voltage and the charging current
through the microprocessor, and receiving the charging current detected
by the first charging current detecting means and adjusting the
detected charging current to constant current and voltage in response
to a control signal from the microprocessor if the boosted or stepped-down
voltage and the charging current are not constant current and voltage
of a predetermined level; a first switch for receiving the constant
current/voltage adjusted by the first constant current/voltage adjusting
means and controlling charge of the battery of the mobile phone
through an output terminal in response to a control signal from
the microprocessor; second charging current detecting means for
receiving the DC power (DC current and DC voltage) converted by
the travel adaptor, and detecting charging current and outputting
the detected charging current to the microprocessor to charge the
secondary battery; second constant current/voltage adjusting means
for receiving the charging current detected by the second charging
current detecting means, performing operation on the charging current
through the microprocessor, and receiving the charging current detected
by the second charging current detecting means and adjusting the
detected charging current to constant current and voltage in response
to a control signal from the microprocessor if the charging current
is not constant current and voltage of a predetermined level; a
second switch for receiving the constant current/voltage adjusted
by the second constant current/voltage adjusting means and controlling
the charge of the secondary battery in response to a control signal
from the microprocessor; discharge preventing means for performing
control in such a way as to prevent the DC voltage charged in the
secondary battery if the battery of the mobile phone is not connected
to the output terminal, and to output the DC power charged in the
secondary battery to the voltage converting means and charge the
battery of the mobile phone if the battery of the mobile phone is
connected to the output terminal; charge status display means for
displaying charge status of the battery of the mobile phone and
charge status of the secondary battery; and temperature detecting
means for detecting surrounding temperature and outputting the surrounding
temperature to the microprocessor to prevent charge of the battery
of the mobile phone and the secondary battery under control of the
microprocessor if the surrounding temperature is above a predetermined
temperature of about 45.degree. C. or below a predetermined temperature
of about -5.degree. C.
7. The portable charger for a mobile phone as set forth in claim
6, wherein the discharge preventing means is composed of a field
effect transistor that operates in such a way as to be switched
on by application of low level voltage to a gate terminal through
bias resistors and output the DC power, charged in the secondary
battery, to the voltage converting means through protection means
if the battery of the mobile phone is connected to positive and
negative electrodes of the output terminal, and to be switched off
by application of high level voltage to a gate terminal through
bias resistors and charge the battery of the mobile terminal if
the battery of the mobile phone is not connected to the positive
and negative electrodes of the output terminal.
8. The portable charger for a mobile phone as set forth in claim
6, wherein the charge status display means is a dual type light
emission diode, and the dual type light emission diode emits red
light to indicate that the secondary battery is being charged if
the charge of the battery of the mobile phone is completed, emits
green light to indicate that the battery of the mobile phone is
being charged if the charge of the secondary battery is completed,
and does not emit light to indicate that the battery of the mobile
phone and the secondary battery have been charged if the battery
of the mobile phone and the secondary battery have been charged.
9. A portable charger for a mobile phone, comprising: a front housing
having an accommodation recess formed in a front side of the front
housing to accommodate a mobile phone, and cutouts formed on right
and left sides of an upper portion of the accommodation recess to
allow a user to easily grip the mobile phone seated in the accommodation
recess and easily manipulate a volume key of the mobile phone; a
rear housing fastened to a back of the front housing by screws to
close a rear open side of the front housing; a belt clip detachably
attached into a long accommodation recess formed on a back of the
rear housing to change a mounting position of the rear housing;
a fastening unit placed in the long accommodation recess formed
on the back of the rear housing to prevent the belt clip from being
removed from the accommodation recess; a pair of clamps rotatably
placed on right and left sidewalls of the accommodation recess formed
in the front housing to prevent the mobile phone from being removed
during charging while engaging with recesses formed on both sides
of the mobile phone, respectively; a release button placed above
a location between the front housing and the rear housing to regulate
protrusion and retraction of projections of the clamps; an interface
connector mounted in a lower portion of the accommodation recess,
formed in the front housing, through a shaft and a coil spring to
be rotated in a block; and a secondary battery placed in a space
formed by the front and rear housings to be charged with DC voltage,
obtained by a travel adaptor, under control of a charge control
unit.
10. A charge control unit for a mobile phone portable charger comprising:
a microprocessor for controlling an entire operation relating to
charge of a battery of the mobile phone and a secondary battery
associated with the portable charger; voltage converting means for
receiving DC power converted by a travel adaptor and DC power (DC
current and DC voltage) charged in the secondary battery, boosting
or stepping down the DC power to charge the battery of the mobile
phone, and outputting the boosted or stepped-down DC power to the
microprocessor; first charging current detecting means for receiving
the DC power boosted or stepped-down by the voltage converting means,
detecting charging current, and outputting the detected charging
current to the microprocessor; first constant current/voltage adjusting
means for receiving the DC voltage boosted or stepped-down by the
voltage converting means and the charging current detected by the
first charging current detecting means, performing operation on
the DC voltage and the charging current through the microprocessor,
and receiving the charging current detected by the first charging
current detecting means and adjusting the detected charging current
to constant current and voltage in response to a control signal
from the microprocessor if the boosted or stepped-down voltage and
the charging current are not constant current and voltage of a predetermined
level; a first switch for receiving the constant current/voltage
adjusted by the first constant current/voltage adjusting means and
controlling charge of the battery of the mobile phone through an
output terminal in response to a control signal from the microprocessor;
second charging current detecting means for receiving the DC power
(DC current and DC voltage) converted by the travel adaptor, and
detecting charging current and outputting the detected charging
current to the microprocessor to charge the secondary battery; second
constant current/voltage adjusting means for receiving the charging
current detected by the second charging current detecting means,
performing operation on the charging current through the microprocessor,
and receiving the charging current detected by the second charging
current detecting means and adjusting the detected charging current
to constant current and voltage in response to a control signal
from the microprocessor if the charging current is not constant
current and voltage of a predetermined level; a second switch for
receiving the constant current/voltage adjusted by the second constant
current/voltage adjusting means and controlling the charge of the
secondary battery in response to a control signal from the microprocessor;
discharge preventing means for performing control in such a way
as to prevent the DC voltage charged in the secondary battery if
the battery of the mobile phone is not connected to the output terminal,
and to output the DC power charged in the secondary battery to the
voltage converting means and charge the battery of the mobile phone
if the battery of the mobile phone is connected to the output terminal;
charge status display means for displaying charge status of the
battery of the mobile phone and charge status of the secondary battery;
and temperature detecting means for detecting surrounding temperature
and outputting the surrounding temperature to the microprocessor
to prevent charge of the battery of the mobile phone and the secondary
battery under control of the microprocessor if the surrounding temperature
is above a predetermined temperature of about 45.degree. C. or below
a predetermined temperature of about -5.degree. C.
11. A charge control unit as set forth in claim 10, wherein the
discharge preventing means is composed of a field effect transistor
that operates in such a way as to be switched on by application
of low level voltage to a gate terminal through bias resistors and
output the DC power, charged in the secondary battery, to the voltage
converting means through protection means if the battery of the
mobile phone is connected to positive and negative electrodes of
the output terminal, and to be switched off by application of high
level voltage to a gate terminal through bias resistors and charge
the battery of the mobile terminal if the battery of the mobile
phone is not connected to the positive and negative electrodes of
the output terminal.
12. A charge control unit as set forth in claim 10, wherein the
charge status display means is a dual type light emission diode,
and the dual type light emission diode emits red light to indicate
that the secondary battery is being charged if the charge of the
battery of the mobile phone is completed, emits green light to indicate
that the battery of the mobile phone is being charged if the charge
of the secondary battery is completed, and does not emit light to
indicate that the battery of the mobile phone and the secondary
battery have been charged if the battery of the mobile phone and
the secondary battery have been charged.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates generally to a portable charger for
a mobile phone (also referred to as a mobile communication terminal
or a portable phone) and, more particularly, to a portable charger
for a mobile phone, which is easy to carry, can easily charge the
battery of the mobile phone with direct current power charged in
a secondary battery, and can simultaneously charge the secondary
battery and the battery of the mobile phone using a travel adaptor.
2. Description of the Related Art
A conventional portable charger equipped with an internal battery
is disclosed in Korean Utility Model Registration No. 20-0275514
(registered on May 1, 2002).
In the portable charger equipped with an internal battery, which
is disclosed in Korean Utility Model Registration. No. 20-0275514,
an Alternating Current (AC) power connection unit 110 provided with
a power plug 111 is attached to a side of a body 100 to allow the
portable charger to be connected to a domestic power outlet, as
shown in FIGS. 1 and 2.
The power plug 111 can be retracted to a position parallel to the
body 100 using a rotation shaft 112 provided on the body 100, so
that it is secured in a position perpendicular to the body 100 when
in use (indicated by dotted lines), and is retracted into a recess
113 when not in use (indicated by solid lines).
A cable 151 and an interface jack 152 are provided on a side of
the body 100 to allow the charger to be electrically connected to
the interface connector (not shown) of a mobile phone. The internal
terminals of the interface connector of the mobile phone are electrically
connected to the positive (+) terminal, negative (-) terminal and
identification data input (IN) terminal of an external battery connection
unit 115.
As shown in FIG. 2, the charger is electrically connected to domestic
110V or 220V AC power through the AC power connection unit 110.
An ElectroMagnetic Interference (EMI) filter 121 is connected to
the AC power connection unit 110 to remove noise from AC power that
is applied through the AC power connection unit 110. A rectifying
unit 122 is connected to the EMI filter 121 to rectify the AC power,
applied through the EMI filter 121, to Direct Current (DC) power
and supply the DC power to a switching mode power supply unit 114.
The switching mode power supply unit 114 functions to receive the
DC current from the rectifying unit, interrupt the DC current according
to a duty ratio, and supply stepped-down charging current. The switching
mode power supply unit 114 includes a coil unit 114a for producing
the stepped-down current by interrupting the DC current input from
the rectifying unit 122, and a switching control unit 114b for adjusting
the amount of charging current flowing into the secondary battery
by switching the coil unit 114a.
The external battery connection unit 115 is connected to the interface
connector of the mobile phone so that identification data (ID) transmitted
from the battery identification terminal of the mobile phone is
applied to a microprocessor 119 through an identification output
terminal OUT. The interface jack 152 is provided with the positive
(+) input terminal, the negative (-) input terminal and the identification
data input (IN) terminal that are connected to the charging terminal,
ground terminal and identification terminal of the battery of the
mobile phone, respectively.
In FIG. 2, a Pulse Width Modulation (PWM) control unit 116 adjusts
the voltage level of current charging voltage based on a voltage
control signal applied from the microprocessor 119 so that charging
voltage applied to the external battery connection unit 115 reaches
a specific reference voltage and is maintained at the specific reference
voltage. The modulation signal output terminal of the PWM control
unit 116 is connected to the base terminal of a transistor Q1, the
output terminal of the switching mode power supply unit 114 is connected
to the collector terminal of the transistor Q1, and the charging
current input terminal of the external battery connection unit 115
as well as the voltage feedback signal input terminal of the PWM
control unit 116 are connected to the emitter terminal of the transistor
Q1.
An internal battery 117 connected to the output terminal of the
switching mode power supply unit 114 is a secondary battery that
stores electrical energy using DC power, output from the switching
mode power supply unit 114, as charging current. The internal battery
117 is charged with electricity to charge an external battery (battery
of a mobile phone) that is connected to the external battery connection
unit 115.
The internal battery 117 is equipped with an overcharge prevention
circuit to prevent overcharge. A photocoupler 118 is connected between
the microprocessor 119 and the switching control unit 114b of the
switching mode power supply unit 114 to convert a current control
signal, applied by the microprocessor 119, into an optical signal,
to convert the optical signal into an electrical signal having a
specific duty ratio and to control the application of power to the
switching mode power supply unit 114.
In the above case, when the battery of a mobile phone is connected
to the external battery connection unit 115, the microprocessor
119 reads the identification data of the battery transmitted from
the external battery connection unit 115, sets the maximum charging
voltage and maximum charging current, and controls the switching
mode power supply unit 114 and the PWM control unit 116 based on
the maximum charging voltage and the maximum charging current.
In the case where a user charges the battery of a mobile phone
with domestic 110V or 220V AC power, the user inserts the power
plug 111 of the AC power connection unit 120 into a domestic power
outlet and connects the interface jack 152 to the interface connector
(not shown) of the mobile phone.
While the AC power flowing through the AC power connection unit
110 passes through the EMI filter 121, noise is filtered out from
the AC power. The noise-free AC power is rectified to DC power by
the rectifying unit 122, and the DC power is applied to the switching
mode power supply unit 114.
The DC power applied to the switching mode power supply unit 114
is used to charge the battery of the mobile phone and the internal
battery 117 under the control of the microprocessor 119.
After applying a current control signal, that is, a PWM modulation
signal, to the photocoupler 118 based on the preset maximum charging
voltage and charging current of the internal battery 117, the microprocessor
119 reads the identification data (ID) of the mobile phone transmitted
from the external battery connection unit 115, sets the maximum
charging voltage and maximum charging current for the battery of
the mobile phone, and sets the reference voltage of the PWM control
unit 116 to the maximum charging voltage of the battery of the mobile
phone.
The photocoupler 118 outputs an electrical signal having a specific
duty ratio to the switching control unit 114b to correspond to the
current control signal transmitted from the microprocessor 119.
The switching control unit 114b adjusts the amount of charging current,
which will be supplied to the external battery connection unit 115
and the internal battery 117, by interrupting the operation of the
coil unit 114a according to the duty ratio of the electrical signal.
The PWM control unit 116 compares the voltage (current charged
voltage of the battery of the mobile phone), applied to the emitter
terminal of the transistor Q1 and the connection node of the external
battery connection unit 115, with the preset reference voltage,
and adjusts the period of ON/OFF operation of the transistor Q1
so that the current charged voltage reaches the preset reference
voltage and is maintained at the preset reference voltage.
When the current charged voltage reaches the reference voltage,
the PWM control unit 116 indicates to the microprocessor 119 that
current charged voltage has reached the reference voltage. The microprocessor
119 applies a current control signal to the photocoupler 118 in
response to the information so that the amount of charging current
output from the switching mode power supply unit 114 gradually decreases.
That is, the microprocessor 119 controls the operation of the switching
mode power supply unit 114 according to the preset maximum charging
voltage and current for the internal battery 117. Furthermore, the
microprocessor 119 prevents overcharge of the battery connected
to the external battery connection unit 115 by adjusting the amount
of charging current that is output from the switching mode power
supply unit 114 based on the current charged voltage of the mobile
phone. When the internal battery 117 reaches a fully charged state,
the microprocessor 119 detects the fully charged state using the
overcharge prevention circuit and automatically blocks the inflow
of charging current.
According to the above-described operation, the charging current
output from the switching mode power supply unit 114 charges the
internal battery 117 through a diode D1, and is applied to the external
battery connection unit 115 and charges the battery of the mobile
phone as well.
An operation of charging the battery of a mobile phone with charging
power charged in the internal battery 117 is described below.
When the interface jack 152 of FIG. 1 is connected to the interface
connector of the mobile phone in the case where the internal battery
117 has been charged through the above-described operation and the
mobile phone must be charged at a location where domestic AC power
is not available, part of the charging power is supplied through
an operating power supply circuit as operating power.
At this time, the microprocessor 119 reads the identification data
(ID) of the battery of the mobile phone transmitted from the external
battery connection unit 115, sets the maximum charging voltage and
current of the battery of the mobile phone, and sets the reference
voltage of the PWM control unit 116 to the maximum charging voltage.
The PWM control unit 116 charges the battery of the mobile phone
by comparing the current charged voltage of the battery of the mobile
phone, connected to the external battery connection unit 115, with
the preset reference voltage, and adjusting the period of ON/OFF
operation of the transistor Q1 so that the current charged voltage
reaches the preset reference voltage and is maintained at the preset
reference voltage.
Although the conventional portable charger equipped with an internal
battery is capable of charging the battery of a mobile phone even
at locations where domestic AC power and automobile battery power
are not available, the conventional charger is disadvantageous in
that the conventional charger is not possible and the charging operation
of the conventional charger is complicated and inconvenient because
the cable 152, provided with the interface jack 152 that will be
connected to the interface connector of a mobile phone, is required
to charge the battery of the mobile phone and one end of the cable
152 must be electrically connected to the body 100.
SUMMARY OF THE INVENTION
Accordingly, the present invention has been made keeping in mind
the above problems occurring in the prior art, and an object of
the present invention is to provide a portable charger for a mobile
phone that is easy to carry because it can be easily attached to
and detached from a waist belt using a belt clip and the wearing
position of the portable charger for a mobile phone can be changed
through the rotation thereof when being worn on a waist belt.
Another object of the present invention is to provide a portable
charger for a mobile phone, which can simultaneously charge a secondary
battery and the battery of a mobile phone with the DC power obtained
by a travel adaptor.
Still another object of the present invention is to provide a portable
charger for a mobile phone, which can prevent charging power from
being discharged from a secondary battery when the mobile phone
is not electrically connected to the accommodation recess of the
front housing of the portable charger for a mobile phone.
Still another object of the present invention is to provide a portable
charger for a mobile phone, which prevents charge when the surrounding
temperature is equal to or higher than a predetermined temperature
(for example, 45.degree. C.) or equal to or lower than a predetermined
temperature (for example, -5.degree. C.).
Still another object of the present invention is to provide a portable
charger for a mobile phone, which can easily charge the battery
of a mobile phone with the DC power charged in the secondary battery.
Still another object of the present invention is to provide a portable
charger for a mobile phone, which can easily charge the battery
of a mobile phone using an automobile battery while connecting to
a hands-free kit.
Still another object of the present invention is to provide a portable
charger for a mobile phone, which can simultaneously charge a secondary
battery and the battery of a mobile phone using a travel adaptor
while electrically connecting to a table charging stand.
In order to accomplish the above object, the present invention
provides a portable charger for a mobile phone, including a front
housing having an accommodation recess formed in the front side
of the front housing to accommodate a mobile phone, and cutouts
formed on the right and left sides of the upper portion of the accommodation
recess to allow a user to easily grip the mobile phone seated in
the accommodation recess and easily manipulate a volume key of the
mobile phone; a rear housing fastened to the back of the front housing
by screws to close the rear open side of the front housing; a belt
clip detachably attached into a long accommodation recess formed
on the back of the rear housing to change the mounting position
of the rear housing; a fastening unit placed in the long accommodation
recess formed on the back of the rear housing to prevent the belt
clip from being removed from the accommodation recess; a pair of
clamps rotatably placed on the right and left sidewalls of the accommodation
recess formed in the front housing to prevent the mobile phone from
being removed during charging while engaging with recesses formed
on both sides of the mobile phone, respectively; a release button
placed above a location between the front housing and the rear housing
to regulate protrusion and retraction of projections of the clamps;
an interface connector mounted in the lower portion of the accommodation
recess, formed in the front housing, through a shaft and a coil
spring to be rotated in a block; a secondary battery placed in a
space formed by the front and rear housings; and a charge control
unit configured to perform control so that Direct Current (DC) voltage,
converted by a travel adaptor, is received through a cord and a
connector and the second battery and the battery of the mobile phone
are simultaneously charged with the DC voltage, or the battery of
the mobile phone is charged with DC voltage charged in the secondary
battery.
Additionally, the present invention provides a portable charger
for a mobile phone, including a front housing having an accommodation
recess formed in the front side of the front housing to accommodate
a mobile phone, and cutouts formed on the right and left sides of
an upper portion of the accommodation recess to allow a user to
easily grip the mobile phone seated in the accommodation recess
and easily manipulate a volume key of the mobile phone; a rear housing
fastened to the back of the front housing by screws to close the
rear open side of the front housing; a belt clip detachably attached
into a long accommodation recess formed on the back of the rear
housing to change the mounting position of the rear housing; a fastening
unit placed in the long accommodation recess formed on the back
of the rear housing to prevent the belt clip from being removed
from the accommodation recess; a pair of clamps rotatably placed
on the right and left sidewalls of the accommodation recess formed
in the front housing to prevent the mobile phone from being removed
during charging while engaging with recesses formed on both sides
of the mobile phone, respectively; a release button placed above
a location between the front housing and the rear housing to regulate
protrusion and retraction of projections of the clamps; an interface
connector mounted in the lower portion of the accommodation recess,
formed in the front housing, through a shaft and a coil spring to
be rotated in a block; and a secondary battery placed in a space
formed by the front and rear housings to be charged with DC voltage,
obtained by a travel adaptor, under the control of a charge control
unit.
BRIEF DESCRIPTION OF THE DRAWINGS
The above and other objects, features and advantages of the present
invention will be more clearly understood from the following detailed
description taken in conjunction with the accompanying drawings,
in which:
FIG. 1 is a schematic perspective view showing a conventional portable
charger that is equipped with a secondary battery;
FIG. 2 is a block diagram showing the control circuit of the conventional
portable charger;
FIG. 3 is a front view schematically showing a portable charger
for a mobile phone according to an embodiment of the present invention;
FIG. 4 is a right side view showing the portable charger for a
mobile phone with a belt clip in a non-operational position;
FIG. 5 is a right side view showing the portable charger for a
mobile phone with the belt clip in an operational position;
FIG. 6 is a longitudinal section taken along line A--A of FIG.
3 with a secondary battery and a charge control circuit removed
therefrom;
FIG. 7 is a rearward perspective view showing the portable charger
for a mobile phone with the belt clip separated therefrom;
FIG. 8 is a rearward perspective view showing the portable charger
for a mobile phone with a coupling member is separated from the
fastening member of the belt clip;
FIG. 9 is a view showing the coupling member rotated by 90.degree.
clockwise and counterclockwise around the fastening member of the
belt clip in the portable charger for a mobile phone according to
the embodiment of the present invention;
FIG. 10 is a view showing the electrical connection of a charging
cable to the portable charger for a mobile phone according to the
embodiment of the present invention and the mounting of a mobile
phone in the portable charger for a mobile phone according to the
embodiment of the present invention;
FIG. 11 is a view showing the mounting of a mobile phone in the
portable charger for a mobile phone according to the embodiment
of the present invention and the charging of the battery of the
mobile phone using the secondary battery;
FIG. 12 is a view showing the portable charger for a mobile phone
with a release button not operated and a rear housing removed therefrom;
FIG. 13 is an exploded view of the portable charger for a mobile
phone according to the embodiment of the present invention;
FIG. 14 is a block diagram showing the control unit of the portable
charger for a mobile phone according to the embodiment of the present
invention;
FIG. 15 is a view showing the portable charger for a mobile phone
that is being charged while remaining combined with a hands-free
kit for an automobile; and
FIG. 16 is a view showing the portable charger for a mobile phone
that is being charged while remaining mounted on a table charging
stand.
DESCRIPTION OF THE PREFERRED EMBODIMENTS
Reference now should be made to the drawings, in which the same
reference numerals are used throughout the different drawings to
designate the same or similar components.
FIG. 3 is a front view schematically showing a portable charger
for a mobile phone according to an embodiment of the present invention.
FIG. 4 is a right side view showing the portable charger for a mobile
phone with a belt clip in a non-operational position. FIG. 5 is
a right side view showing the portable charger for a mobile phone
with the belt clip in an operational position. FIG. 6 is a longitudinal
section taken along line A--A of FIG. 3 with a secondary battery
and a charge control circuit removed therefrom. FIG. 7 is a rearward
perspective view showing the portable charger for a mobile phone
with the belt clip separated therefrom. FIG. 8 is a rearward perspective
view showing the portable charger for a mobile phone with a coupling
member is separated from the fastening member of the belt clip.
FIG. 9 is a view showing the coupling member rotated by 90.degree.
clockwise and counterclockwise around the fastening member of the
belt clip in the portable charger for a mobile phone according to
the embodiment of the present invention. FIG. 10 is a view showing
the electrical connection of a charging cable to the portable charger
for a mobile phone according to the embodiment of the present invention
and the mounting of a mobile phone in the portable charger for a
mobile phone according to the embodiment of the present invention.
FIG. 11 is a view showing the mounting of a mobile phone in the
portable charger for a mobile phone according to the embodiment
of the present invention and the charging of the battery of the
mobile phone using the secondary battery. FIG. 12 is a view showing
the portable charger for a mobile phone with a release button not
operated and a rear housing removed therefrom. FIG. 13 is an exploded
view of the portable charger for a mobile phone according to the
embodiment of the present invention. FIG. 14 is a block diagram
showing the control unit of the portable charger for a mobile phone
according to the embodiment of the present invention.
As shown in FIGS. 3 to 14, the portable charger 1000 for a mobile
phone according to an embodiment of the present invention includes
a front housing 10 having an accommodation recess 14 formed in the
front side of the front housing 10 to accommodate a mobile phone
12, and cutouts 16 formed on the right and left sides of an upper
portion of the accommodation recess 14 to allow a user to easily
grip the mobile phone 12 seated in the accommodation recess 14 and
easily manipulate the volume key (not shown) of the mobile phone
12; a rear housing 20 fastened to the back of the front housing
10 by screws 11 to close the rear open side of the front housing
10; a belt clip 30 detachably attached into a long accommodation
recess 22 formed on a back of the rear housing 20 to change the
mounting position of the rear housing 20; a fastening unit 40 placed
in the long accommodation recess 22 formed on the back of the rear
housing 20 to prevent the belt clip 30 from being removed from the
accommodation recess 22; a pair of clamps 50 rotatably placed on
the right and left sidewalls of the accommodation recess 14 formed
in the front housing 10 to prevent the mobile phone 12 from being
removed during charging while engaging with recesses (not shown)
formed on both sides of the mobile phone 12, respectively; a release
button 60 placed above a location between the front housing 10 and
the rear housing 20 to regulate the protrusion and retraction of
projections 50c of the clamps 50; an interface connector 70 mounted
in the lower portion of the accommodation recess 14, formed in the
front housing 10, through a shaft 71a and a coil spring 71b to be
rotated in a block 71; a secondary battery 210 placed in a space
formed by the front and rear housings 10 and 20; and a charge control
unit 80 configured to perform control so that DC voltage, converted
by a travel adaptor 200, is received through a cord 202 and a connector
208 and the second battery 210 and the battery of the mobile phone
12 are simultaneously charged with the DC voltage, or the battery
of the mobile phone 12 is charged with DC voltage charged in the
secondary battery 210.
The belt clip 30 includes a coupling member 31 having a pair of
projections 31a formed on the top of the coupling member 31, and
a recess 31c formed on the bottom of the coupling member 31 to engage
with the projection 42 of the fastening unit 40, so that the coupling
member 31, which is placed in the long accommodation recess 22 formed
on the back of the rear housing 20, is fastened by the fastening
unit 40; a rotating plate 32 having a pair of circular projections
32a and 32b configured to engage with a pair of depressions 31b
formed on the circular projection 31d of the coupling member 31,
and a coil spring 32d configured to push a catch 32c downward; a
fastening member 33 integrated with the circular projection 31d
of the coupling member 31 using ultrasonic fusion welding to accommodate
the rotating plate 32 so that the rotating plate 32 can be rotated
clockwise or counterclockwise; a moving member 34 mounted on the
fastening member 33 to be rotated around a hinge pin 33a; and a
coil spring 35 configured to push the front end (lower portion in
FIG. 6) of the moving member 34 to the lower portion of the fastening
member 33.
As shown in FIGS. 7 and 8, the fastening unit 40 includes a slider
41 configured to be pushed upward by a spring (not shown); a projection
42 integrally formed on the top of the slider 41 to prevent the
removal of the belt clip 30 while engaging with the recess 31c formed
on the bottom of the coupling member 31 of the belt clip 30; and
a projection plate 43 integrally formed on the slider 41 to slide
the slider 41 downward to detach the belt clip 30 from the rear
housing 10.
As shown in FIGS. 10 to 12, the clamps 50 includes a pair of projections
50c placed on both sidewalls of the accommodation recess 14, formed
in the front housing 10, to be selectively projected and retracted
and to clamp the mobile phone 12 so as to prevent removal of the
mobile phone 12 seated in the accommodation recess 14; a pair of
coil springs 51 mounted on shafts 51a; a pair of lower actuating
members 52 configured to be pushed inward by the coil spring 51
and protrude the projections 50c when the release button 60 is pulled;
and a pair of upper actuating levers 53 mounted on hinge shafts
51a so that, when the release button 60 is pushed, the upper actuating
levers 53 come into contact with an inclined surface 64 downwardly
formed from the bottom of the release button 60 and are rotated
outward, thus retracting the projections 50c.
The release button 60 is pushed by a coil spring 62 so that the
projections 50c of the clamps 50 are pushed toward the accommodation
recess 14 formed in the front housing 10.
As shown in FIG. 14, the charge control unit 80 includes a microprocessor
81 for controlling an entire operation relating to charge of the
battery of the mobile phone 12 and the secondary battery 210; a
voltage converting means 82 for receiving the DC power converted
by the travel adaptor and the DC power (DC current and DC voltage)
charged in the secondary battery 210, boosting or stepping down
the DC power to charge the battery of the mobile phone 12, and outputting
the boosted or stepped-down DC power to the microprocessor 81; first
charging current detecting means 83 for receiving the DC power boosted
or stepped-down by the voltage converting means 82, detecting charging
current, and outputting the detected charging current to the microprocessor
81; first constant current/voltage adjusting means 84 for receiving
the DC voltage boosted or stepped-down by the voltage converting
means 82 and the charging current detected by the first charging
current detecting means 83, performing operation on the DC voltage
and the charging current through the microprocessor 81, and receiving
the charging current detected by the first charging current detecting
means 83 and adjusting the detected charging current to constant
current and voltage in response to a control signal from the microprocessor
81 if the boosted or stepped-down voltage and the charging current
are not constant current and voltage of a predetermined level; a
first switch 86 for receiving the constant current/voltage adjusted
by the first constant current/voltage adjusting means 84 and controlling
the charge of the battery of the mobile phone 12 through an output
terminal 85 in response to a control signal from the microprocessor
81; second charging current detecting means 87 for receiving the
DC power (DC current and DC voltage) converted by the travel adaptor,
and detecting charging current and outputting the detected charging
current to the microprocessor 81 to charge the secondary battery
210; second constant current/voltage adjusting means 88 for receiving
the charging current detected by the second charging current detecting
means 87, performing operation on the charging current through the
microprocessor 81, and receiving the charging current detected by
the second charging current detecting means 83 and adjusting the
detected charging current to constant current and voltage in response
to a control signal from the microprocessor 81 if the charging current
is not the constant current and voltage of a predetermined level;
a second switch 89 for receiving the constant current/voltage adjusted
by the second constant current/voltage adjusting means 88 and controlling
charge of the secondary battery 210 in response to a control signal
from the microprocessor 81; discharge preventing means 90 for performing
control in such a way as to prevent the DC voltage charged in the
secondary battery 210 if the battery of the mobile phone 12 is not
connected to the output terminal 85, and to output the DC power
charged in the secondary battery 210 to the voltage converting means
82 and charge the battery of the mobile phone 12 if the battery
of the mobile phone 12 is connected to the output terminal 85; charge
status display means 91 for displaying charge status of the battery
of the mobile phone 12 and charge status of the secondary battery
210; and temperature detecting means 92 for detecting surrounding
temperature and outputting the surrounding temperature to the microprocessor
81 to prevent charge of the battery of the mobile phone 12 and the
secondary battery 210 under control of the microprocessor 81 if
the surrounding temperature is above a predetermined temperature
of about 45.degree. C. or below a predetermined temperature of about
-5.degree. C.
The discharge preventing means 90 is composed of a field effect
transistor Q5 that operates in such a way as to be switched on by
application of low level voltage to a gate terminal through bias
resistors R39 and R54 and output the DC power, charged in the secondary
battery 210, to the voltage converting means 82 through protection
means 211 if the battery of the mobile phone 12 is connected to
the positive and negative electrodes of the output terminal 85,
and to be switched off by application of high level voltage to a
gate terminal through bias resistors R39 and R54 and charge the
battery of the mobile terminal 12 if the battery of the mobile phone
12 is not connected to the positive and negative electrodes of the
output terminal 85.
As described in FIGS. 10, 11, 13 and 14, the charge status display
means 91 is a dual type light emission diode LED1, and the dual
type light emission diode LED1 emits red light to indicate that
the secondary battery 210 is being charged if the charge of the
battery of the mobile phone 12 is completed, emits green light to
indicate that the battery of the mobile phone 12 is being charged
if the charge of the secondary battery 210 is completed, and does
not emit light to indicate that the battery of the mobile phone
12 and the secondary battery 210 have been charged if the battery
of the mobile phone 12 and the secondary battery 210 have been charged.
In the charge status display means 91, R62 and R63 are current limiting
resistors.
The temperature detecting means 92 is a temperature detecting sensor
that detects surrounding temperature, and the secondary battery
210 is equipped with the protection means 211 that detects and filters
out excessive current and voltage.
In the drawings, reference numeral 202 is a cord that connects
the travel adaptor 200 and the connector 208, reference numeral
204 is wiring that electrically connects the interface connector
70 with the charge control unit 80.
The operation and effect of the portable charger for a mobile phone
1000 according to the embodiment of the present invention are described.
In order to charge the battery of the mobile phone 12 and the secondary
battery 210 seated in the portable charger for a mobile phone 1000
according to the embodiment of the present invention, the user,
as shown in FIGS. 10 and 11, connects a charge terminal (not shown),
which is formed in the lower portion of the mobile phone, to the
interface connector 70 while seating the mobile phone 12 into the
accommodation recess 14.
At this time, the projections 50c of the clamps 50 are engaged
with the recesses formed on both sides of the mobile phone 12, so
that the mobile phone 12 is prevented from the portable charger
for a mobile phone 1000. In other words, when the projections 50c
of the clamps 50 mounted on both sidewalls of the accommodation
recess 14 formed in the front housing 10 are engaged with the recesses
formed on both sides of the mobile phone 12, the lower actuating
levers 52 constituting the lower portions of the clamps 50 are rotated
counterclockwise around the hinge shafts 50a against the coil springs
51 and the upper actuating levers 53 of the clamps 50 are also rotated
around the hinge shafts 50a, so that the mobile phone 12 can be
easily fitted into the accommodation recess 14.
When the mobile phone 12 is completely seated in the accommodation
access 14 formed in the front housing 10, the upper actuating levers
53 and the lower actuating levers 52 are rotated around the hinge
shafts 50a clockwise by the elastic force of the coil springs 51.
At this time, the projections 50c of the clamps 50 are engaged with
the recesses formed on both sides of the mobile phone 12, so that
the mobile phone 12 is firmly secured in the portable charger for
a mobile phone 1000.
When the mobile phone 12 is seated in the accommodation recess
14 of the front housing 10 of the portable charger for a mobile
phone 1000, the connector 208 attached to one end of the cord 202
is electrically connected to the charging connector (not shown)
mounted in the portable charger for a mobile phone 1000, and then
the plug 200a of the travel adaptor 200 attached to the other end
of the cord 202 is connected to a 110 or 220 Vac outlet, the travel
adaptor 200 receives 110 or 220 Vac, converts the received power
into DC voltage and supplies the DC voltage to the charge control
unit 80.
Accordingly, the battery of the mobile phone 12 and the secondary
battery 210 are charged with the DC voltage under the control of
the charge control unit 80, so that a dual type Light Emitting Diode
(LED) LED1 emits orange light.
Meanwhile, if the battery of the mobile phone 12 has been charged
during charging first, the dual type LED LED1 emits red light, thus
indicating that the secondary battery 210 is being charged. If the
secondary battery 210 has been charged during charging first, the
dual type LED LED1 emits green light, thus indicating that the battery
of the mobile phone 12 is being charged. If both of the battery
of the mobile phone 12 and the secondary battery 210 have been charged,
the dual type LED LED1 does not emit light, thus indicating that
both of the battery of the mobile phone 12 and the secondary battery
210 have been charged.
When the battery of the mobile phone 12 and the secondary battery
210 have been charged, the projections 50c of the clamps 50 are
retracted by pushing the release button 60 of the portable charger
for a mobile phone, so that the user can make calls while carrying
the mobile phone 12 separated from the portable charger for a mobile
phone 1000.
An operation of retracting the projections 50c of the clamps 50
is illustrated in FIG. 12. When the release button 12 is pushed,
the release button 12 is lowered while pushing the coil springs
62. Accordingly, the inclined surface 64 formed on the lower part
of the release button 60 rotates the upper actuating levers 53 of
the clamps 50 around the hinge shafts 50a counterclockwise, so that
the lower actuating levers 52 are rotated around the shafts 51a
counterclockwise against the elastic force of the coil springs 51.
As a result, the projections 50c of the clamps 50 are inserted into
the front housing 10, so that the mobile phone 12 can be easily
separated from the portable charger for a mobile phone 1000.
When the lower portion of the moving member 34 is taken away from
the fastening member 33 by pushing the moving member 34 of the belt
clip 30, the moving member 3 is released from being pushed while
the waist belt (not shown) remains positioned between the fastening
member 33 and the moving member 34. Accordingly, the moving member
34 clamps the waist belt due to the elastic force of the coil springs
35, so that the belt clip 30 is fastened to the waist belt.
If the user feels inconvenience when the user sits or bends the
user's back while wearing the portable charger for a mobile phone
1000 on a waist belt, the rotating plate 32 of the belt clip 30
is rotated in the accommodating recess (not shown), which is formed
in the fastening member 33, by rotating the portable charger for
a mobile phone 1000 a specific angle (for example, 30.degree. or
90.degree.) clockwise or counterclockwise.
At this time, the catch 32c placed on the rotating plate 32 of
the belt clip 30 is rotated while pushing the coil spring 32d, and
the front end of the catch 32c is fitted into the recess 33b formed
in the inside wall of the accommodation recess of the fastening
member 33. When the catch 32c is rotated further, the catch 32c
can be rotated by 90.degree. clockwise or counterclockwise. Accordingly,
the assembly of the front housing 10 and the rear housing 20 of
the portable charger for a mobile phone 1000 according to the embodiment
of the present invention can be located along the length of the
waist belt, so that the portable charger for a mobile phone 1000
is easy to carry.
When the battery of the mobile phone 12 is discharged after the
use of the mobile phone 12, and the secondary battery 210 is discharged
after charging the battery of the mobile phone 12 with the DC power
charged in the secondary battery 210, the mobile phone 12 is seated
in the accommodation recess 14 formed in the front housing 10 of
the portable charger for a mobile phone 1000. Moreover, the charging
terminal (not shown) formed on the lower portion of the mobile phone
12 is connected to the interface connector 70, the connector 208
placed on one side of the cord 202 is electrically connected to
the charging connector (not shown) placed in the portable charger
for a mobile phone 1000, and the plug 200a of the travel adaptor
200 placed on the other end of the cord 202 is connected to the
110 or 220 Vac outlet, so that the battery of the mobile phone 12
and the secondary battery 210 are charged under the control of the
charge control unit 80.
An operation of charging the charge control unit 80 is described
in detail below.
The DC power obtained by the travel adaptor 200 is boosted or stepped-down
by the voltage converting means 82, and the boosted or stepped-down
DC power is output both to the microprocessor 81 and to the first
charging current detecting means 83.
The first charging current detecting means 83 receives the DC current
boosted or stepped-down by the voltage converting means 82, detects
charging current, and outputs the detected charging current both
to the microprocessor 81 and to the first constant current/voltage
adjusting means 84. The microprocessor 81 receives the DC voltage
boosted or stepped-down by the voltage converting means 82 and the
charging current detected by the first charging current detecting
means 83, and performs operation on the DC voltage and the charging
current. If the DC voltage and the charging current are not constant
voltage and current of a predetermined level that is required for
the charge of the battery of the mobile phone 12, the microprocessor
81 outputs a control signal to the first constant current/voltage
adjusting means 84, and the first constant current/voltage adjusting
means 84 adjusts the DC voltage and the charging current to constant
voltage and current of a predetermined level required for the charge
of the battery of the mobile phone 12 and outputs the adjusted current
and voltage to the first switch 86.
The first switch 86 receives a control signal, which instructs
the first switch 86 to charge the battery of the mobile phone 12,
from the microprocessor 81, is switched on, and then charges the
battery of the mobile phone 12 through the positive and negative
electrodes of the output terminal 85.
At the same time, the second charging current detecting means 87
receives the DC power obtained by the travel adaptor 200, detects
charging current, and outputs the charging current both to the microprocessor
81 and to the second constant current/voltage adjusting means 88.
The microprocessor 81 receives the charging current detected by
the second charging current detecting means 87 and performs operation
on the charging current. If the charging current is not constant
current and voltage of a predetermined level that is required for
the charge of the secondary battery 210, the microprocessor 81 outputs
a constant current/voltage adjusting control signal to the second
constant current/voltage adjusting means 88. The second constant
current/voltage adjusting means 88 adjusts the charging current
to the constant current and voltage of a predetermined level that
is required for the charge of the secondary battery 210, and outputs
the constant current and voltage to the second switch 89.
In this case, the second switch 89 is switched on in response to
the control signal from the microprocessor 81, and charges the secondary
battery 210 with the constant voltage and current adjusted by the
second constant current/voltage adjusting means 87, with excessive
voltage and current being detected and filtered out by the protection
means 211 mounted in the secondary battery 210.
An operation of charging the battery of the mobile phone 12 with
the DC current charged in the secondary battery 210.
In order to charge the battery of the mobile phone 12 with the
DC power charged in the secondary battery 210 when the battery of
the mobile phone 12 is discharged after the user of the mobile phone
12, the mobile phone 12 is seated in the accommodation recess 14
of the front housing 10.
In this case, since the battery of the mobile phone 12 is connected
to the output terminal 85 as the charging terminal (not shown) placed
on the lower portion of the mobile phone 12 comes into contact with
the interface connector 70, voltage of a low level is applied to
the gate terminal of the field effect transistor Q52 through the
bias resistors R39 and R54. Accordingly, the field effect transistor
Q52 is switched on, so that the DC current charged in the secondary
battery 210 is output to the voltage converting means 82 through
the protection means 211.
The voltage converting means 82 receives the DC power charged in
the secondary battery 210 through the protecting means 211 and the
discharge preventing means 90, boosts or steps down the DC voltage
to charge the battery of the mobile phone 12, and outputs the boosted
or stepped-down DC voltage both to the microprocessor 81 and to
the first charging current detecting means 83. The charging current
detected by the first charging current detecting means 83 is output
both to the microprocessor 81 and to the first constant current/voltage
adjusting means 84.
Accordingly, the microprocessor 81 receives the DC voltage boosted
or stepped-down by the voltage converting means 82 and the charging
current detected by the first charging current detecting means 83,
and performs operation on the boosted or stepped-down voltage and
the charging current. If the boosted or stepped-down voltage and
the charging current are not constant voltage or current of a predetermined
level that is required for the charge of the battery of the mobile
phone 12, the microprocessor 81 outputs a constant current/voltage
control signal to the first constant current/voltage adjusting means
84, and the first constant current/voltage adjusting means 84 adjusts
the boosted or stepped-down voltage and the charging current to
constant current and voltage of a predetermined level that is required
for the charge of the battery of the mobile phone 12, and outputs
the adjusted voltage and current to the first switch 86.
The first switch 86 receives a control signal, which instructs
the first switch 86 to charge the battery of the mobile phone 12,
from the microprocessor 81, is switched on, and charges the battery
of the mobile phone 12 through the positive and negative electrodes
of the output terminal 85.
Meanwhile, if the battery of the mobile phone 12 is not connected
to the output terminal 85, voltage of a high level is applied to
the gate terminal of the field effect transistor Q52 through the
bias resistors R39 and R54 and the field effect transistor Q52 is
switched off, so that the natural discharge of the DC power charged
in the secondary battery 210 is prevented.
FIG. 15 is a view showing the portable charger for a mobile phone
1000 that is being charged while remaining combined with a hands-free
kit for an automobile. FIG. 16 is a view showing the portable charger
for a mobile phone 1000 that is being charged while remaining mounted
on a table charging stand.
As shown in FIGS. 15 and 16, after the belt clip 30 detachably
attached to the back of the portable charger for a mobile phone
1000 is separated from the portable charger for a mobile phone 1000
and the accommodation recess 22 formed in the back of the rear housing
100 of the portable charger for a mobile phone 1000 is connected
to the hands-free kit 220 or table charging stand 230 using a bracket
224, the mobile phone 12 is seated in the accommodation recess 14
by pushing the mobile phone 12 into the accommodation recess 14
formed in the front of the front housing 10.
Thereafter, after a connector 226 connected to the hands-free kit
220 or the table charging stand 230 is connected to the charging
connector of the portable charger for a mobile phone 1000, and the
hands-free kit 220 or the plug 228 of the table charging stand 230
is connected to an automobile battery or 110 or 220 Vac outlet,
the battery of the mobile phone 12 or the secondary battery 210
contained in the portable charger for a mobile phone according to
an embodiment of the present invention is charged.
The attachment and detachment of the belt clip 30 detachably attached
to the accommodation recess 22 formed in the back of the portable
charger for a mobile phone 1000, that is, the back of the rear housing
20, is described below.
In order to detach the belt clip 30 from the accommodation recess
22 formed in the back of the rear housing of the portable charger
for a mobile phone 1000, the projection plate 43 integrated with
the slider 41 of the fastening unit 40 is pushed downward. At this
time, the slider 41 of the fastening member 40 is pushed downward
while compressing a spring (not shown), and then the projection
42 integrated with the front end of the slider 41 is removed from
the recess 31c formed in the lower portion of the coupling member
31 of the belt clip 30.
In this case, when the fastening member 33 and moving member 34
of the belt clip 30 is pushed downward or pulled, the pair of projections
31a integrated with the upper end of the coupling member 31 is removed
from the accommodation recess (not shown) formed in the back of
the rear housing 20 and the belt clip 30, which is fitted into the
accommodation recess 22 formed in the back of the rear housing 20
of the portable charger for a mobile phone 1000, is separated from
the portable charger for a mobile phone 1000.
In order to fit the belt clip 30 into the accommodation recess
22 formed in the back of the rear housing 20 of the portable charger
for a mobile phone 1000, after the projection plate 43 integrated
with the upper portion of the slider 41 is pushed downward, the
pair of projections 31a integrated with the upper end of the belt
clip 30 is pushed into the accommodation recess formed in the upper
portion of the back of the rear housing 20, and the fastening member
33 and moving member 34 of the belt clip 30 are pushed into the
accommodation recess 22 formed in the back of the rear housing 20.
When the grip of the projection plate 43 integrated with the slider
41 of the fastening member 40 is released, the slider 41 is moved
upward by the elastic force of a spring (or elastic member; not
shown) and the projection 42 integrally formed at the upper end
of the slider 41 is fitted into the recess 31c formed at the lower
end of the coupling member 31, so that the coupling member 31 of
the belt clip 30 is securely fitted into the accommodation recess
22 of the rear housing 20.
Consequently, in accordance with the present invention, the portable
charger for a mobile phone 1000 can be worn on a waist belt using
the belt clip, the wearing position of the portable charger for
a mobile phone 1000 can be changed through the rotation thereof
in the case of being worn on a waist belt, the secondary battery
210 and the battery of the mobile phone 12 can be charged with the
DC power obtained by the travel adaptor 200 at the same time, and
the charging power of the secondary battery 210 can be prevented
from be discharged by turning off the discharge preventing means
90 in the case where the mobile phone 12 is not electrically connected
to the accommodation recess 14 of the front housing 10 of the portable
charger for a mobile phone 1000.
Furthermore, in accordance with the present invention, charge can
be prevented in the case where the surrounding temperature is equal
to or higher than a predetermined temperature (about 45.degree.
C.) or lower than a predetermined temperature (about -5.degree.
C.), the battery of the mobile phone can be charged with the DC
power charged in the secondary battery 210 in a temperature range
of about -5.degree. C. to 45.degree. C., the portable charger for
a mobile phone 1000 can easily charge the battery of the mobile
phone 12 using the automobile battery while connecting to the hands-free
kit 220, and the portable charger for a mobile phone 1000 can simultaneously
charge the secondary battery 210 and the battery of the mobile phone
12 while electrically connecting to the table charging stand 230.
Although in the above description, the case where the portable
charger for a mobile phone is worn on the waist belt has been described
as an example, the present invention is not limited to this case,
but the portable charger for a mobile phone may be worn on the edge
of a jacket or edge of a pocket of a trouser.
Furthermore, although in the above description, the case where
the battery, along with the mobile phone 12, is seated in the accommodation
recess 14 of the front housing 10 and is charged with power has
been described, the present invention is not limited to this case,
but only the battery may be seated in the accommodation recess 14
and be charged with power.
As described above, in accordance with the present invention, the
portable charger for a mobile phone can be easily worn on a waist
belt using the belt clip, the wearing position of the portable charger
for a mobile phone can be changed through the rotation thereof in
the case of being worn on a waist belt, the secondary battery and
the battery of the mobile phone can be charged with the DC power
obtained by the travel adaptor at the same time, the charging power
of the secondary battery can be prevented from being discharged
by turning off the discharge preventing means in the case where
the mobile phone is not electrically connected to the accommodation
recess of the front housing of the portable charger for a mobile
phone, charge can be prevented in the case where the surrounding
temperature is equal to or higher than a predetermined temperature
(about 45.degree. C.) or lower than a predetermined temperature
(about -5.degree. C.), the battery of the mobile phone can be easily
charged with the DC voltage charged in the secondary battery, the
portable charger for a mobile phone can easily charge the battery
of the mobile phone using the automobile battery while connecting
to the hands-free kit, and the portable charger for a mobile phone
can simultaneously charge the secondary battery and the battery
of the mobile phone while electrically connecting to the table charging
stand.
Although the preferred embodiments of the present invention have
been disclosed for illustrative purposes, those skilled in the art
will appreciate that various modifications, additions and substitutions
are possible, without departing from the scope and spirit of the
invention as disclosed in the accompanying claims. |