AU726840B3

AU726840B3 - Mobile phone battery charger with forwarding switch for forwarding incoming call from mobile phone to phone set

Info

Publication number: AU726840B3
Application number: AU61232/00A
Authority: AU
Inventors: Scanner Chen
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-09-21
Filing date: 2000-09-21
Publication date: 2000-11-23
Anticipated expiration: 2006-09-21

Description

P/00/011 Regulation 3.2

AUSTRALIA

Patents Act 1990 COMPLETE

SPECIFICATION

Invention Title: Mobile Phone Battery Charger with Forwarding Switch for Forwarding Incoming Call from Mobile Phone to Phone Set The following statement is a full description of this invention, including the best method of performing it known to me: Mobile Phone Battery Charger with Forwarding Switch for Forwarding Incoming Call from Mobile Phone to Phone Set 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 forwarding switch 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 in using the mobile phones as follows: 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 a 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.

A further 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.

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, 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 T 1 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 3fand 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 P 1 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, Ti, 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 RI. 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 RI. 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 Multifrequency(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 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 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 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.

Claims

1. A mobile phone battery charger(3) provided with a concave portion(31) arranged with a plurality of contacts(3a, 3b, 3c, 3d, 3e, 3f) corresponding to output terminals(3a', 3b', 3c', 3d', 3e', 3f) arranged on a mobile phone(4) mounted in the concave portion(31), characterized in that the battery charger(3) is provided with a switch device(l) comprising two subscriber lines(L1, L2) coupled to a public telecom network, two phone set connecting lines(P1, P2) for connecting a phone set(21), two earphone connecting lines(R1, R2) electrically coupled to the earphone output terminals(3f, 3e') of the mobile phone(4) via contacts(3f, 3e) respectively, and two microphone connecting lines(T1, T2) electrically coupled to the microphone output terminals(3c', 3d') of the mobile phone(4) via contacts(3c, 3d) respectively, so that a user can answer an incoming call of the mobile phone(4) by the phone set(21) under switch control of the switch device(l).

2. The mobile phone battery charger as claimed in claim 1, wherein the battery charger comprises a battery charging circuit(5) for charging the mobile phone battery attached on the mobile phone.

3. The mobile phone battery charger as claimed in claim 1, wherein the switch device comprises: a central processing a communication loop switching circuit(ll) coupled to the subscriber lines(L 1, L2) and the phone set connecting lines(P1, P2); a relay(16) provided with two contact switches(RY1, RY2) arranged in the communication loop switching circuit(ll), controllable by the central processing an incoming call detecting circuit(18) having an input line(S2) connected to the earphone connecting line(R1) for detecting the incoming call of the mobile phone(4), and an output line(S3) connected to the central processing capable of transmitting an output signal to the central processing via the output line(S3) when detecting an incoming call; a ring generation circuit(17) for generating a simulating ring signal, controllable by the central processing a DTMF decoding circuit(13) coupled to the communication loop switching circuit(ll) for receiving and decoding DTMF signal sent from the phone set(4) and sending the decoded DTMF signal to the central processing an audio signal converting circuit(14) used to convert audio signal of the mobile phone(4) sent from earphone connecting lines(R1, R2) and microphone connecting lines(T1, T2) into an audio signal form suitable to be coupled to the phone set(21) via output lines(R, and a power supplying circuit(12) connected between the communication loop switching circuit(ll) and the output lines(R,T) of the audio signal converting circuit(14) for supplying a power source to the switch device(l). Scanner CHEN By their Patent Attorneys PIPERS Dated:- 21 September, 2000