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Mobile Phone Patent Abstract
A switch device for forwarding an incoming call from a mobile phone
to a phone set coupled to a public telecom network, allowing the
user to answer the incoming call of the mobile phone by a phone
set, is disclosed. The switch device includes a central processing
unit, a communication loop switching circuit for establishing a
communication loop for the phone set, a relay controllable by the
central processing unit, an incoming call detecting circuit for
detecting the incoming call of the mobile phone and correspondingly
generating an output signal to the central processing unit, an audio
signal converting circuit for converting the audio signal carried
on the earphone connecting lines and the microphone connecting lines
of the mobile phone into an audio signal form adapted to be coupled
to the phone set, and a power supplying circuit for supplying a
power source to the audio signal converting circuit. The switch
device further includes a ring generation circuit for generating
a simulating ring signal when the incoming call is detected by the
incoming call detecting circuit.
Mobile Phone Patent Claims
I claim:
1. A control device for answering an incoming call of a mobile
phone by a phone set coupled to a pair of subscriber lines of a
public telecom network, the mobile phone being provided with two
earphone connecting lines and two microphone connecting lines for
outputting an audio signal of the mobile phone, comprising: a central
processing unit; a communication loop switching circuit having a
pair of output lines coupled to the subscriber lines and a pair
of phone set connecting lines coupled to the phone set, capable
of establishing a communication loop for the phone set; a relay
provided with two contact switches arranged in the communication
loop switching circuit, controllable by the central processing unit;
an incoming call detecting circuit having an input line connected
to one of the earphone connecting lines and an output line coupled
to the central processing unit, capable of generating an output
signal to the central processing unit via the output line when detecting
an incoming call; an audio signal converting circuit having four
input lines connected to the earphone connecting lines and the microphone
connecting lines of the mobile phone and two output lines, for converting
the audio signal carried on the earphone connecting lines and the
microphone connecting lines into an audio signal form adapted to
be coupled to the phone set via the output lines; and a power supplying
circuit connected between the communication loop switching circuit
and the output lines of the audio signal converting circuit for
supplying a power source to the audio signal converting circuit.
2. The control device as claimed in claim 1, further comprising
a ring generation circuit controllable by the central processing
unit, capable of generating a simulating ring signal when the incoming
call is detected by the incoming call detecting circuit.
3. The control device as claimed in claim 1, further comprising
a DTMF decoding circuit coupled to the communication loop switching
circuit for receiving and decoding a set of DTMF signal sent from
the phone set and then sending a decoded DTMF signal to the central
processing unit.
4. A mobile phone battery charger with a switch device for answering
an incoming call of a mobile phone by a phone set coupled to a pair
of subscriber lines of a public telecom network, the mobile phone
being provided with two earphone connecting lines and two microphone
connecting lines, the battery charger being provided with a plurality
of contacts adapted to be contacted with the earphone connecting
lines and the microphone connecting lines of the mobile phone when
the mobile phone is mounted on the battery charger, the switch device
comprising: a central processing unit; a communication loop switching
circuit having a pair of output lines coupled to the subscriber
lines and a pair of phone set connecting lines coupled to the phone
set, capable of establishing a communication loop for the phone
set; a relay provided with two contact switches arranged in the
communication loop switching circuit, controllable by the central
processing unit; an incoming call detecting circuit having an input
line connected to one of the earphone connecting lines and an output
line coupled to the central processing unit, capable of generating
an output signal to the central processing unit via the output line
when detecting an incoming call; an audio signal converting circuit
having four input lines connected to the earphone connecting lines
and the microphone connecting lines of the mobile phone and two
output lines, for converting the audio signal carried on the earphone
connecting lines and the microphone connecting lines into an audio
signal form adapted to be coupled to the phone set via the output
lines; and a power supplying circuit connected between the communication
loop switching circuit and the output lines of the audio signal
converting circuit for supplying a power source to the audio signal
converting circuit.
5. The mobile phone battery charger as claimed in claim 4, further
comprising a ring generation circuit controllable by the central
processing unit, capable of generating a simulating ring signal
when the incoming call is detected by the incoming call detecting
circuit.
6. The mobile phone battery charger as claimed in claim 4, further
comprising a DTMF decoding circuit coupled to the communication
loop switching circuit for receiving and decoding a set of DTMF
signal sent from the phone set and then sending a decoded DTMF signal
to the central processing unit.
7. The mobile phone battery charger as claimed in claim 4, further
comprising a battery charging circuit therein.
Mobile Phone Patent Description
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to a control device for mobile phone
battery charger, and more particularly to a mobile phone battery
charger with a switch device capable of allowing the user to answer
the incoming call of a mobile phone mounted on the battery charger
by an indoor phone set.
2. Description of the Prior Art
In the modem society, mobile phones are wildly used in communications.
It is noted there are some disadvantages as follows in using the
mobile phones: 1. The battery pack of the mobile phone needs to
be charged when the electric energy of the battery is exhausted.
When an incoming call is forwarded to the mobile phone, the user
of the mobile phone is limited to answer the incoming call by the
mobile phone, which may cause an interrupt to the charging of the
mobile phone battery. It is noted that the interrupt of the charging
of the mobile phone battery may cause an low efficiency to the battery
pack. 2. The mobile phone battery pack normally incorporates some
specific function circuit modules, such as over-current protection
circuit. Repeatedly and randomly mounting the mobile phone battery
pack on the battery charger may damage the electronic circuit arranged
in the battery pack. 3. The communication effect of the mobile phone
may be influenced by environment where the mobile phone is used.
The communication of the mobile phone may be interrupted due to
displacement of the user. In comparison, the indoor phone set provides
a relatively good communication effect than the mobile phone. 4.
The battery charger is normally placed on a table. When the mobile
phone detects an incoming call, the user must move to the place
where the battery charger is placed to answer the incoming call,
which is very inconvenient in use. 5. The high frequency electromagnetic
wave transmitted by he mobile phone is highly possible to influence
the health of the user according to the medical research.
Thus, it is desirable to provide a switch device for the battery
charger to allow the user to answer the incoming call of the mobile
phone by an indoor phone set when the mobile phone is mounted on
the mobile phone battery charger.
SUMMARY OF THE INVENTION
Consequently, a primary object of the present invention is to provide
a mobile phone battery charger with a switch device allowing the
user to answer the incoming call of the mobile phone by a phone
set coupled to public telecom network.
Another object of the present invention is to provide a mobile
phone battery charger having four audio signal connecting lines
capable of connecting to audio signal contacts of the mobile phone
when the mobile phone is placed on the battery charger. In addition,
the battery charger is equipped with two phone set connecting lines
connected to the phone set.
Another object of the present invention is to provide a mobile
phone battery charger with an answering control switch and a battery
charging circuit therein. Under control of the answering control
switch, the user may answer the incoming call of the mobile phone
by an indoor phone set. In addition, the mobile phone battery attached
on the mobile phone may be charged continuously during answering
the incoming call of the mobile phone.
A further object of the present invention is to provide a control
device for answering an incoming call of a mobile phone by a phone
set coupled to a pair of subscriber lines of a public telecom network.
To further understand the present invention, reference is made
to the following detailed description of a preferred embodiment
of the present invention, as well as the attached drawings, wherein:
BRIEF DESCRIPTION OF THE PREFERRED EMBODIMENT
FIG. 1 is a perspective view showing a mobile phone battery charger
in accordance with a preferred embodiment of the present invention;
FIG. 2 is a system connection diagram of the present invention;
FIG. 3 is a circuit diagram of the present invention;
FIG. 4 is a circuit diagram of the charging circuit of FIG. 3;
FIG. 5 is a circuit diagram of the ring generation circuit of FIG.
3; and
FIG. 6 is a circuit diagram of the incoming call detecting circuit
of FIG. 3.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT
With reference to the drawings and in particular to FIGS. 1 and
2, wherein a battery charger constructed in accordance with a preferred
embodiment of the present invention is shown, the mobile phone battery
charger 3 is provided with a casing 30 with at least one concave
portion 31 formed thereon.
A mobile phone attached with a mobile phone battery may be mounted
in the concave portion 31. Typically, a number of output terminals
3a', 3b', 3c', 3d', 3e', and 3f' are arranged on the mobile phone
4, as shown in FIG. 1. Further, a number of contacts 3a, 3b, 3c,
3d, 3e, and 3f are arranged on the concave portion 31, corresponding
to the output terminals 3a', 3b', 3c', 3d', 3e', and 3f', of the
mobile phone 4.
Two subscribe lines L1 and L2 are extended from the battery charger
3 and then connected to a public telecom network(abbreviated PSTN).
Further, two phone set connecting lines P1 and P2 are extended from
the battery charger 3 and then connected to a telephone system 2
comprising at least one indoor phone set 21. Alternatively, the
phone set connecting lines P1 and P2 may directly connect to the
phone set 21.
With reference to FIG. 2, the battery charger 3 includes a forwarding
switch device 1 which may be arranged in the battery charger or
in a form of external switch box connected to the battery charger.
The switch device 1 includes two earphone connecting lines R1, R2,
and two microphone connecting lines T1 and T2.
When a mobile phone 4 is mounted on the concave portion 31 of the
battery charger 3, the earphone connecting lines R1 and R2 are connected
to the earphone output terminals 3f' and 3e' of the mobile phone
respectively via contacts 3f and 3e. At the same time, the microphone
connecting lines T1 and T2 are connected to the microphone output
terminals 3d' and 3c' of the mobile phone respectively via contacts
3d and 3c.
In operation, when an incoming call to the mobile phone 4 is detected,
the user may answer the incoming call by hanging off the phone set
21. At this time, the earphone connecting lines R1 and R2 and the
microphone connecting lines T1 and T2 are electrically coupled to
the phone set 21 via phone set connecting lines P1 and P2 under
control of the switch device 1.
The switch device 1 of the present invention may be a manually
operated switch or an automatic switching control circuit capable
of automatically detecting the incoming call of the mobile phone
and transferring the communication loop to the phone set.
As shown in FIG. 3, the switch device 1 includes a communication
loop switching circuit 11, a power supplying circuit 12, a DTMF
decoding circuit 13, an audio signal converting circuit 14, a central
processing unit 15, a relay 16, a ring generation circuit 17, and
an incoming call detecting circuit 18.
The central processing unit 15 is capable of controlling the relay
16 by actuating the coil RY of the relay 16 through an output line.
The relay 16 has two contact switches RY1 and RY2 actuated by the
coil RY of the relay 16. The contact switches RY1 and RY2 are arranged
in the communication loop switching circuit 11. So, the connecting
lines P1 and P2 may be coupled to the subscriber lines L1 and L2
when both the contact switches RY1 and RY2 are at normally closed
position. On the contrary, the connecting lines P1 and P2 are coupled
to the mobile phone via connecting lines R1, R2, T1, and T2 when
both the contact switches RY1 and RY2 are at normally open position.
The central processing unit 15 is capable of controlling the ring
generation circuit 17 through an output line S1. When the incoming
call detecting circuit 18 detects an incoming call of the mobile
phone, the central processing unit 15 will actuate the ring generation
circuit 17 to ring.
The incoming call detecting circuit 18 has an input line S2 connected
to the earphone connecting line R1. So, when the mobile phone 4
is placed on the concave portion 31 of the battery charger 3, the
input line S2 of the incoming call detecting circuit 18 may be coupled
to the earphone output terminal 3f' of the mobile phone via the
earphone connecting line R1. So, the incoming call detecting circuit
18 is capable of generating an output signal to the central processing
unit 15 via an output line S3 when detecting an incoming call of
the mobile phone.
DTMF decoding circuit 13 is used to receive Dual-tone Multi-frequency(abbreviated
DTMF) signal sent from the phone set 21 and then decode the DTMF
signal and send the decoded DTMF signal to the central processing
unit 15.
The audio signal converting circuit 14 is used to convert 4-wired
audio signal of the mobile phone into two-wired audio signal of
the phone set. The audio signal converting circuit 14 is provided
with two output lines R and T which are coupled to the communication
loop switching circuit 11 via the power supplying circuit 12.
The power supplying circuit 12 is connected between the communication
loop switching circuit 11 and the audio signal converting circuit
14 for supplying a power source to the switch device 1 of the present
invention during answering the incoming call of the mobile phone
4 by the phone set 21.
In a preferred embodiment of the present invention, a battery charging
circuit 5 is arranged in the casing 30 of the battery charger 3,
so that the battery of the mobile phone 4 mounted in the concave
portion 31 may be charged. FIG. 4 shows a further detailed control
circuit of the battery charging circuit 5 of FIG. 3. The battery
charging circuit 5 converts a DC power source +5V into a suitable
charging power source to the mobile phone battery to be charged
via terminals B+ and B-.
FIG. 5 is a further detailed circuit diagram of the ring generation
circuit 17 of FIG. 3. The ring generation circuit 17 comprises a
transistor Q1 and a buzzer BZ. When the ring generation circuit
17 receives an actuating signal from line S1, the transistor Q1
will actuate the buzzer BZ to generate a simulating ring signal.
FIG. 6 is a further detailed circuit diagram of the incoming call
detecting circuit 18 of FIG. 3, which mainly includes two amplifiers
Q2 and Q3, a transistor Q4, and associated electronic components
such as resistors and capacitors. When the incoming call detecting
circuit 18 receives an incoming call signal through line S2, the
received signal will be amplified by the amplifiers Q2 and Q3. Thereafter,
the transistor Q4 is turned on to transmit an output signal through
line S3 to the central processing unit 15.
The present invention may be operated in two operation modes. In
the first operation mode, the contact switches RY1 and RY2 are at
normally closed position, as shown in FIG. 3. So, the connecting
lines P1 and P2 are coupled to the subscriber lines L1 and L2 through
the contact switches RY1 and RY2.
In the second operation mode, the contact switches RY1 and RY2
are at normally open position, under control of the central processing
unit 15. So, the connecting lines P1 and P2 are coupled to the output
lines R and T of the audio signal converting circuit 14 via power
supplying circuit 12.
When the detecting circuit 18 detects an incoming call through
the earphone connecting line R1, it is capable of sending an output
signal to the central processing unit 15 through line S3. The central
processing unit 15 will actuate the ring generation circuit 17 to
ring. At this time, if the user hangs off the phone set and then
presses a predetermined key of the phone set, the central processing
unit 15 will detect the predetermined key through the DTMF decoding
circuit 13. Thereafter, the central processing unit 15 will actuate
the relay 15 so as to switch the contact switches RY1 and RY2 to
normally open position. Thus, the user may answer the incoming call
of the mobile phone by the phone set.
Although the preferred embodiments of the present invention have
been described to illustrate the present invention, it is apparent
that changes and modifications in the specifically described embodiments
can be carried out without departing from the scope of the invention
which is intended to be limited only by the appended claims. |