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Mobile Phone Patent Abstract
A mobile phone battery charger with a power cord winding mechanism
is disclosed. The battery charger is formed with a power cord receiving
chamber in which a winding reel is disposed. An upper end surface
of the winding reel is disposed with two contacts connected with
the power cord. One contact is disposed at the center of the upper
end surface of the winding reel, while the other contact is formed
as a circumferential contact around the central contact. A pair
of inner terminals of the power cord are respectively soldered at
the two contacts, and a pair of outer terminals of the power cord
are extended through a passage out of the battery charger. Two resilient
plates extend from a diaphragm of the battery charger into the receiving
chamber. The resilient plates respectively contact with the two
contacts. The winding reel is fitted around a projecting shaft formed
on the bottom of the receiving chamber. A coil spring is arranged
between the winding reel and the projecting shaft to provide a rotating
force for the winding reel to wind up the power cord.
Mobile Phone Patent Claims
What is claimed is:
1. A mobile phone battery charger with a power cord and a power
cord winding mechanism for winding the power cord in the battery
charger, comprising:
a battery charger casing with at least one charging socket formed
thereon;
a power cord receiving chamber formed within the battery charger
casing;
a projecting shaft projecting from a bottom plate of the battery
charger casing into the power cord receiving chamber;
a power cord winding reel rotatably mounted on the projecting shaft;
a power cord wound around the winding reel;
a coil spring connected between the winding reel and the projecting
shaft to provide a rotating force for the winding reel to wind up
the power cord;
a central contact arranged on a center of the power cord winding
reel, and a circumferential contact located around the central contact,
a pair of inner terminals of the power cord being respectively soldered
to the central contact and the circumferential contact and a pair
of outer terminals of the power cord extending out of the battery
charger through a passage in the battery charger casing; and
two resilient plates extending from a diaphragm in the battery
charger casing into the receiving chamber, the resilient plates
respectively contacting the central contact and the circumferential
contact.
2. The mobile phone battery charger with a power cord winding mechanism
as claimed in claim 1, further comprising a plurality of downward
projecting posts formed on a bottom surface of the diaphragm of
the battery charger and contacting the winding reel.
3. The mobile phone battery charger with a power cord winding mechanism
as claimed in claim 1, further comprising a guide way in the receiving
chamber, the guide way guiding the movement of the power cord in
a predetermined direction.
4. The mobile phone battery charger with a power cord winding mechanism
as claimed in claim 3, further comprising a shift button movably
mounted on the battery charger casing at the guide way, the shift
button being shifted to tightly clamp the power cord when the power
cord is extended from the battery charger.
5. The mobile phone battery charger with a power cord winding mechanism
as claimed in claim 1, wherein an inner end of the coil spring is
hooked in a vertical slit in the projecting shaft and an outer end
of the coil spring is hooked in a vertical slit in a lower end face
of the winding reel.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a mobile phone battery charger,
and more particularly to a mobile phone battery charger with a power
cord winding mechanism. When the battery charger is not used, the
winding mechanism is able to wind up the power cord of the battery
charger to prevent the power cord from being exposed outside.
2. Description of the Prior Art
Mobile phones have been more and more widely used nowadays. Typically,
a mobile phone battery charger for the mobile phone is connected
with a long power cord with an electric plug. In the case that the
battery charger of the mobile phone and other electric appliances,
such as an electric fan, must use an electric socket or an extension
wire, numerous power cords will randomly scatter over the floor.
Under such circumstance, dust tends to accumulate on the power cords
and a user will have disorderly visual feeling. Furthermore, when
the user carries the mobile phone battery charger to use outdoors,
the exposed power cord will make it inconvenient to carry and store
the battery charger.
Some of the existent domestic electric appliances, such as dust
cleaner, are equipped with an automatic cable winding mechanism.
However, such cable winding mechanism cannot be directly adapted
to the battery charger of the mobile phone. Therefore, it is necessary
to provide a power cord winding mechanism for the mobile phone battery
charger, which has specific and fine structure and is able to wind
up the power cord. When the battery charger is not used, the power
cord can be wound in the battery charger without being exposed outside.
SUMMARY OF THE INVENTION
Consequently, the primary object of the present invention is to
provide a power cord winding mechanism for a mobile phone battery
charger. By means of the power cord winding mechanism, the power
cord extended from the mobile phone battery charger can be wound
in the battery charger.
To achieve the above objects, in accordance with a preferred embodiment
of the present invention, there is provided a battery charger formed
with a power cord receiving chamber therein. A winding reel is disposed
in the receiving chamber for winding the power cord. The upper end
surface of the winding reel is disposed with two contacts connected
with the power cord. Two resilient plates are fixedly disposed on
upper side of the receiving chamber to respectively contact with
the contacts. A coil spring is arranged between the winding reel
and the projecting shaft to provide a rotating force for the winding
reel to wind up the power cord. One of the contacts is disposed
at the center of the upper end surface of the winding reel, while
the other contact is formed as a circumferential contact around
the central contact. Accordingly, when the winding reel is rotated,
the two resilient plates are kept one-to-one in contact with the
two contacts.
In order that the present invention may more readily be understood,
the following description is given, merely be way of example, reference
being made to the accompanying drawings, wherein:
BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a perspective view of a battery charger in accordance
with a preferred embodiment of the present invention;
FIG. 2 is a sectional view showing the internal structure of the
battery charger of the present invention;
FIG. 3 is a perspective exploded view of the power cord winding
mechanism of the present invention;
FIG. 4 is a top plane view of the present invention, showing the
power cord is extended from the battery charger of the present invention;
and
FIG. 5 is a top plane view of the present invention, showing the
power cord is wound in the battery charger.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to FIG. 1, there is shown a perspective view of
a battery charger in accordance with a preferred embodiment of the
present invention. The casing of the mobile phone battery charger
10 of the present invention is formed with two charging sockets
11, 12. A mobile phone attached with a battery can be inserted into
the first charging socket 11, and a mobile phone battery can be
inserted into the second charging socket 12. The base 13 of the
battery charger 10 is formed with an inner space therein serving
as a power cord receiving chamber in which a power cord 40 can be
wound and received.
Referring to FIGS. 2 and 3, a power cord winding reel 20 is disposed
in the battery charger 10. The upper end surface 21 of the winding
reel 20 is disposed with two contacts 22, 23. One contact 22 is
disposed at the center of the upper end surface 21 of the winding
reel 20, while the other contact 23 is formed as a circumferential
contact around the central contact 22.
A pair of inner terminals of the power cord are respectively soldered
at the central contact and the circumferential contact and a pair
of outer terminals of the power cord are extended through a passage
out of the battery charger.
Two resilient plates 14, 15 extend from a diaphragm 19 of the battery
charger 10 above the receiving chamber 13. The resilient plates
14, 15 respectively have protuberances 141, 151 in contact with
the two contacts 22, 23.
The winding reel 20 is fitted around a projecting shaft 16 formed
on the bottom plate of the receiving chamber 10 and is rotatable
about the projecting shaft 16. An inner end of a coil spring 30
is hooked in a vertical slit 161 of the projecting shaft 16 and
an outer end of the coil spring 30 is hooked in a vertical slit
241 of a lower edge 24 of the winding reel 20, whereby the winding
reel 20 is able to wind up the power cord 40. When the power cord
40 is extended from the battery charger, a shift button 50 can be
pushed to clamp the power cord 40 and fix the power cord 40 in an
extended state as shown in FIG. 4.
The two contacts 22, 23 arranged on the upper end surface of the
winding reel 20 are one-to-one in contact with the resilient plates
14, 15 on upper side of the receiving chamber 13. When the winding
reel 20 is rotated, the central contact 22 is rotated at the home
position without displacement so that the central contact 22 is
kept in contact with the protuberance 141 of the resilient plate
14. The circumferential contact 23 of the upper end surface 21 of
the winding reel 20 is maintained as a circular shape during rotation
of the winding reel 20 so that the circumferential contact 23 is
also kept in contact with the protuberance 151 of the other resilient
plate 15. Accordingly, in both extended and wound states, the power
cord 40 is electrically connected with the charging circuit of the
battery charger 10.
In order to prevent the winding reel 20 from being excessively
shifted up or down, three or four downward projecting posts 17 as
shown in FIG. 2 may be formed on the bottom surface of the diaphragm
19. By means of the downward projecting posts 17, the pressure between
the resilient plates 14, 15 and the upper end surface 21 of the
winding reel 20 will not be changed to lead to over-displacement
of the winding reel 20.
The lower ends of the two resilient plates 14, 15 are bent to form
the protuberances 141, 151. The contacts 22, 23 of the upper end
surface 21 of the winding reel 20 are electrically one-to-one in
contact with the protuberances 141, 151 of the resilient plates
14, 15. So, when the winding reel 20 is rotated, the resilient plates
14, 15 are ensured to contact with the contacts 22, 23.
In order to conveniently conduct the power cord 40 out of the receiving
chamber 13, a guide way 18, as shown in FIG. 3, is formed in the
receiving chamber 13, through which the power cord 40 is guided
and extended out of the battery charger 10. The shift button 50
is shifted to clamp and tightly locate the power cord 40 between
the inner surface 51 of the shift button 50 and the inner wall of
the guide way 18. Under such circumstance, the winding reel 20 is
unable to wind up the power cord 40. When the shift button 50 is
restored to its home position as shown in FIG. 5, the winding reel
20 can wind up the power cord 40.
According to the above arrangement of the power cord winding mechanism
of the present invention, the power cord may be pulled out to supply
electric power energy to the battery charger. After the charging
is completed, the power cord may be wound and received in the battery
charger. Therefore, the power cord is prevented from randomly scattering
over the floor and the battery charger can be easily carried and
stored.
The above embodiment is only used to illustrate the present invention,
not intended to limit the scope thereof. Many modifications of the
above embodiment can be made without departing from the spirit of
the present invention.
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