JPH1023118A - Overlay battery device for portable telephone set - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a compact and light-weight portable telephone set which can be used for a long period of time by connecting a built-in battery to the main battery of a power system circuit by means of a parallel circuit. SOLUTION: The portable telephone set main body 1 contains a compact chargeable built-in battery 3 and a portable telephone set circuit 5. The main battery device 2 contains a compact chargeable main battery 6 and can be attached to and detached from the main body 1. When the device 2 is attached to the main body 1, the battery 3 is connected to the battery 6 via a parallel circuit. The owner of a portable telephone is supposed to keep only the main body 1 in his hand, pocket, etc., and also keeps the device 2 in his bag, etc. When an incoming call is received under such conditions, the owner of the telephone set starts talking via the main body 1. At the same time, the power is supplied from the battery 3. If it's decided that the talking may be extended, the device 2 is mounted on the main body 1 and the battery 3 can be charged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a portable telephone having a small size.
It belongs to an overlay battery device in a portable telephone intended for lightweight and long-time use.

[0002]

2. Description of the Related Art As prior art 1, Japanese Utility Model Application Laid-Open No. Hei 5-4557.
No. 1 discloses a main battery 110 and a main battery 110.
Monitoring device 112 for monitoring the voltage of the display device, and a display device 1 for giving a warning based on a signal from the voltage monitoring device 112
14, the sub-battery 1
20, a switch device 122 for selectively connecting the sub-battery 120 and the main battery 110 to the output terminal 116, and a control device 124 for operating the switch device 122 based on a signal supplied from the voltage monitoring device 112. Is disclosed.

In this battery device, the battery can be replaced without interruption during use of the portable telephone.

As prior art 2, Japanese Patent Application Laid-Open No. 5-38057
The publication includes a main battery and an auxiliary battery provided as an auxiliary to the main battery, and when the main battery is replaced,
A portable communication device is disclosed in which when the remaining battery power falls below a prescribed value, the power is switched from a main battery to an auxiliary battery by a switch under the control of a CPU.

As prior art 3, Japanese Patent Laid-Open No. 4-10982
6 is an electronic device using a battery as a power source,
A battery-driven electronic device using a dry battery as a battery and having a battery power supply composed of a Ni-Cd battery connected in parallel to the dry battery is disclosed.

In this battery-driven electronic device, a dry battery and a rechargeable battery are connected in parallel, and the rechargeable battery is charged with the dry battery. When a large current is required, power can be supplied in parallel.

As described above, according to the prior art, small and light weight
The mainstream product is to prepare a small battery and a large battery and use them properly for both long-term use.

[0008]

In the prior art, since the battery capacity and the volume and weight are almost relatively related,
When long-term use is considered, the battery becomes physically large, and the mobile phone as a whole becomes larger and heavier.

[0009] Further, since the owner discharges without being aware of the call (large power consumption) and cannot make an outgoing call or even an incoming call (standby), the owner is informed that the portable telephone is discharged due to battery discharge. You may be unable to use it before you can use it.

Therefore, the present invention relates to a portable telephone,
It is an object of the present invention to provide an overlay battery device for a mobile phone which is small and lightweight, and which can be used for a long time by devising a battery mounting.

[0011]

According to the present invention, there is provided a portable telephone main body, and a main battery device detachably connected to the portable telephone main body, wherein the portable telephone main body has a chargeable built-in battery. And a mobile phone circuit, wherein the main battery device has a built-in rechargeable main battery. A power supply system when the main battery device is mounted on the main body of the mobile phone. In the power supply system circuit, the built-in battery and the main battery are connected in a parallel circuit, and operates by power supply from the battery device,
An overlay battery device for a mobile phone, wherein the built-in battery is charged according to a difference in power capacity between the built-in battery and the battery device.

Further, according to the present invention, there is provided a remaining amount detecting unit which is connected to the built-in battery and switches a signal route of a response / call button when the remaining amount of the built-in battery reaches a specified value. Thus, an overlay battery device for a mobile phone is obtained.

According to the present invention, there is provided an overlay battery device for a portable telephone, wherein the built-in battery is charged when the main battery device is mounted on the portable telephone body.

Further, according to the present invention, when the remaining power of the built-in battery becomes equal to or less than a specified value, a regulating circuit for regulating supply of the same power as communication power is provided. And an overlay battery device for the mobile phone.

[0015]

A parallel drive circuit is constituted by a small built-in battery and a main battery. When the remaining power of the built-in battery falls below a specified value, the power is used as communication power and a means for restricting use is provided. The built-in battery is a minimum power supply for driving the mobile phone body.

When the main battery device is mounted on the main body of the portable telephone, it also serves as a power supply for the built-in battery. The parallel drive circuit enables power supply from the main battery device without interrupting a call when the main battery device is attached to a mobile phone in use (during a call). Also, while the main battery device is mounted, it also has a function of a circuit of the built-in battery.

In the regulation circuit, since the built-in battery for small capacity power is completely discharged quickly, it is completely discharged without the mobile phone holder's knowledge and the standby function is likely to be stopped. When the value becomes equal to or less than the specified value, the supply of the power of the built-in battery as the power for communication is regulated, and the standby state can be set for a long time.

[0018]

1 to 4 show an embodiment of an overlay battery device in a portable telephone according to the present invention.

First, referring to FIG. 1, the overlay battery device in the portable telephone of the present invention has a portable telephone main body 1 and a main battery device 2 detachably connected to the portable telephone main body 1. ing.

The portable telephone body 1 has a built-in rechargeable small battery 3 and a portable telephone circuit 5. The main battery device 2 has a built-in rechargeable small main battery 6. In the power supply system circuit shown in FIG. 1, a built-in battery 3 and a main battery 6 are connected in a parallel circuit (parallel drive circuit) in a circuit configuration of a power supply system when a detachable main battery device 2 is mounted on a mobile phone main body 1. ).

Next, the regulation logic circuit of the overlay battery device in the portable telephone will be described with reference to FIG. The regulation logic circuit includes: a remaining amount detection unit connected to the internal battery; a remaining amount detection unit configured to switch a signal route of a response / call button when the remaining amount of the internal battery reaches a predetermined value; And a regulating circuit 11. The “answer / call button” is an operation button for a response operation when there is an incoming call or an outgoing operation when making a call (outgoing).

The regulating circuit 11 switches the signal route of the answer / talk button when the remaining amount of the built-in battery 3 reaches a specified value.

FIG. 3 shows a state in which the body 1 of the portable telephone having a housing shape and the battery device 2 are separated. FIG. 4 shows the mobile phone main body 1 and a state where the battery device 2 is mounted on one surface of the mobile phone main body 1. As shown in FIG. 3 and FIG.
Has a structure that can be attached to and detached from the mobile phone main body 1 having the built-in battery 3.

Next, an example of use of the portable telephone body 1 will be specifically described. Mobile phone owner (owner)
It is assumed that only the mobile phone main body 1 shown in FIG. 3 is held in a hand or a pocket or the like, and the battery device 2 is put in a bag or the like.

In this state, in the portable telephone body 1,
When an incoming call is received, the holder answers by using the answer / call button of the mobile phone main body 1 and starts talking. At this time, it operates by power supply from the built-in battery 3.

Continuing with the above operation, if it is determined that the talk will be long, the holder takes out the battery device 2 and attaches it to the portable telephone body 1. At this time, the battery device 2
From the power supply from the internal battery 3, the difference in power capacity between the internal battery 3 and the battery device 2
Is charged.

When the power capacity of the built-in battery 3 falls below the specified value while carrying, the remaining power detection unit 10 shown in FIG.
The regulation circuit 11 enters the regulation state. In this restricted state, the main battery 6 is attached because a response / call signal is supplied from the main battery 6 when a response / call button is operated for a response operation when there is an incoming call and a call / call operation for making a call. If not, it will not work. Therefore, the built-in battery 3 is effective only for standby after the remaining power reaches the specified value.

As described above, the portable telephone body 1 is applied to the RCR-27 specification as an example. The portable telephone body 1 is not only the main battery 6 but also the built-in battery 6. Time, call: about 20
Therefore, the size and weight of the mobile phone main body 1 are reduced.
The battery device 2 has a standby equivalent to a known mobile phone:
About 50 hours, talk: about 2 hours. As a regulation value for operating the regulation circuit 11, a power capacity of the built-in battery 3 of 50% is adopted, and after the built-in battery 3 is halved, the same power is used only for standby and not used for telephone calls. After that, we will keep waiting for about 5 hours.

Although it is assumed that the portable device is carried without the main battery 6, the structure is such that the battery device 2 is fit for carrying and talking even when the battery device 2 is mounted. That is, the shape is sufficient to be carried even with the battery device 2 attached.

[0030]

As described in the above embodiments, according to the overlay battery device of the portable telephone, the basic functions of the portable telephone are all satisfied by the built-in battery, although the power is small. The size and weight of the telephone can be reduced.

Further, since the built-in battery and the main battery form a parallel circuit and the built-in battery is charged when the main battery is mounted (during a call, for example), the main battery can be mounted without interrupting the call. .

Furthermore, the remaining power of the built-in battery is monitored, and when the remaining power reaches a specified value, the use of the built-in battery for telephone calls is regulated. Can be prevented from being completely discharged and standby cannot be performed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a power supply system circuit of an overlay battery device in a mobile phone according to the present invention.

FIG. 2 is an explanatory diagram showing a regulation logic circuit of an overlay battery device in the mobile phone of FIG. 1;

FIG. 3 is a side view showing a separated state of a mobile phone main body and a main battery of the overlay battery device in the mobile phone of the present invention.

FIG. 4 is a side view showing a mounted state of a main body and a mobile phone of the overlay battery device in the mobile phone of the present invention.

FIG. 5 is a block diagram showing a circuit configuration of a conventional mobile phone.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cellular phone main body 2 Main battery device 3 Built-in battery 5 Cellular phone circuit 6,110 Main battery 10 Remaining amount detection unit 11 Regulation circuit 112 Voltage monitoring device 124 Control device

Claims (4)

[Claims] 1. A portable telephone having a main body and a main battery device detachably connected to the main body of the portable telephone, wherein the portable telephone has a built-in rechargeable battery and a portable telephone circuit. And the main battery device includes:
In a mobile phone having a built-in rechargeable main battery, the main body of the mobile phone has a power supply system circuit of a power supply system when the main battery device is mounted. A main battery is connected in a parallel circuit, and operates by power supply from the battery device, while the built-in battery is charged by a difference in power capacity between the built-in battery and the battery device. Battery device in a mobile phone. 2. The apparatus according to claim 1, further comprising a remaining amount detecting unit connected to the internal battery and for switching a signal route of a response / call button when the remaining amount of the internal battery reaches a predetermined value. Item 2. An overlay battery device in the mobile phone according to Item 1. 3. The overlay battery device according to claim 1, wherein the built-in battery is charged when the main battery device is mounted on the main body of the mobile phone. 4. A control circuit for controlling supply of said power as communication power when the remaining power of said built-in battery falls below a specified value. Battery device in a mobile phone.