JP2597493Y2 - Electronics - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device which operates by power supply from a battery power supply, and more particularly, to an electronic device which selects a battery power supply having a good charge state from a plurality of battery power supplies and uses the battery power supply for power supply. Equipment related.

[0002]

2. Description of the Related Art There are a wide variety of devices that operate by power supply from a battery power supply. Here, a cordless telephone will be described as an example.

This cordless telephone includes a telephone body connected to a central office and fixedly arranged, and a mobile unit connected to the telephone main body via a wireless line to thereby secure a communication state with the central office. The main body of the telephone operates by being supplied with power from a commercial AC power supply (AC power supply).
Also, the mobile device operates by power supply from a built-in battery power supply so that the mobile device can move freely.

[0004] By the way, when the battery power in the mobile device is consumed and the power supply capability of the mobile device is reduced during a call, the wireless communication state between the telephone body and the mobile device deteriorates, and the call cannot be continued. For this reason, when the battery power is exhausted, an alarm sound is generated to urge replacement of the battery power. In this case, the call must be temporarily interrupted and the battery power source must be replaced with a new one. To resume the call, a call is made and the other party is called again.

[0005]

As described above, in a device with a built-in battery power source, the battery power source must be replaced if the battery power source is exhausted, even during operation, but prior to the start of the operation. If a battery power supply with a good charge state is replaced, replacement during the operation can be prevented beforehand, but such battery power supply cannot be replaced automatically. For example, in a cordless telephone, if the battery power built in the mobile device is automatically changed to a battery having a good charge state before the start of a call, the exchange during the call can be prevented.

Therefore, the present invention, prior to the start of the operation,
It is an object of the present invention to provide an electronic device capable of selecting a battery having a good charge state from among a plurality of battery power sources and arranging the battery power source in a predetermined position to use the battery power source for power supply.

[0007]

In order to achieve the above-mentioned object, a first aspect of the present invention is to provide a main body and a battery power supply which is detachably mounted on a mounting area of the main body and is detached from the main body. In an electronic device having a mobile device to be held,
The main body includes a charging unit that charges a plurality of battery power sources arranged in the storage area, and a selection unit that compares the charging states of the plurality of battery power sources and selects a battery power source with a good charging state. When the mobile device is detached from the mounting area of the main body, the mobile device selects one of the plurality of battery power sources arranged in the mounting area and selects the battery power source selected by the selecting unit. And a holding means for holding.

[0008]

According to the first aspect of the present invention, a plurality of battery power sources arranged in the mounting area of the main body are charged and
By comparing the charging states of the respective battery power supplies, a battery power supply having a good charging state is selected, and when the mobile device is detached from the mounting area of the main body, a plurality of battery power supplies arranged in the mounting area are selected. Of these, the selected battery power supply is clamped alternatively. For this reason, the mobile device is guaranteed to operate with the battery power supply in a good charge state.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram showing an embodiment of a battery power supply exchange apparatus according to the present invention, and the apparatus of this embodiment is applied to a cordless telephone. In FIG. 1, a rectifier circuit 1 is connected to a commercial AC power supply (AC power supply), rectifies an AC voltage to obtain a DC voltage, and converts the DC voltage to a first rechargeable battery 3 via a voltage comparison circuit 2.
Then, the voltage is applied to the second rechargeable battery 4, whereby the respective rechargeable batteries are charged. The rectifier circuit 1 supplies a DC voltage to each part of the telephone body of the cordless telephone, whereby the telephone body operates.

The voltage comparison circuit 2 compares the voltage of the first rechargeable battery 3 with the voltage of the second rechargeable battery 4, and outputs a signal indicating the result of the comparison to the power supply selection circuit 5.

The power supply selection circuit 5 selects one of the first rechargeable battery 3 and the second rechargeable battery 4 based on a signal indicating the comparison result from the voltage comparison circuit 2 as described later. Things.

FIG. 2 shows a circuit configuration of the voltage comparison circuit 2 and the power supply selection circuit 5 shown in FIG. In the figure, each of the resistors 21, 22, 23 and the differential amplifier 24
Are the elements constituting the voltage comparison circuit 2, and the inverters 51 and 52, the resistors 53, 54, 55 and 56, the first transistor 57 and the second transistor 58, the reverse current preventing diodes 59, Reference numeral 60 and the first electromagnet 61 and the second electromagnet 62 are each element constituting the power supply selection circuit 5.

First rechargeable battery 3 and second rechargeable battery 4
Is applied with a voltage from the charging circuit 1 via the current limiting resistor 63 and the current limiting resistor 64, whereby the respective charging is performed. As described later, the first rechargeable battery 3 is inserted between the charging terminals 75 and 76, and the second rechargeable battery 4 is inserted between the charging terminals 77 and 78.

The differential amplifier 24 receives the respective terminal voltages from the first rechargeable battery 3 and the second rechargeable battery 4, and the terminal voltage of the first rechargeable battery 3 is set to the terminal of the second rechargeable battery 4. If the voltage is higher than the voltage, a positive voltage is output. Conversely, if the terminal voltage of the second rechargeable battery 4 is higher than the terminal voltage of the first rechargeable battery 3, a negative voltage is output. Note that this differential amplifier 2
The voltage comparison circuit having 4 as one component is a hysteresis circuit. If the difference between the two terminal voltages does not become larger than a predetermined value, the polarity of the output voltage is not inverted.
This prevents oscillation when the two terminal voltages substantially match.

Here, assuming that a positive voltage is output from the differential amplifier 24, the positive voltage is applied to the second transistor 58 via the two inverters 51 and 52, and the second transistor 58 Turns on. Thereby, the current from the charging circuit 1 is supplied to the second electromagnet 62, and the second electromagnet 62 is excited. At this time,
The first transistor 57 is turned off because the negative voltage inverted by the inverter 51 is applied to the first transistor 57, and thus the first electromagnet 61 is not excited.

If a negative voltage is output from the differential amplifier 24, this negative voltage is applied to the second transistor 58 via the two inverters 51 and 52, and the second transistor 58 Turns off. Therefore, the second electromagnet 62 is not excited. On the other hand, the first transistor 57 is turned on because a positive voltage inverted by the inverter 51 is applied to the first transistor 57, thereby the first electromagnet 61
Is supplied with a current and is excited.

Therefore, when the terminal voltage of the first rechargeable battery 3 is higher than the terminal voltage of the second rechargeable battery 4, a positive voltage is output from the differential amplifier 24, and the second electromagnet 62 is excited. . In addition, the terminal voltage of the second rechargeable battery 4 becomes the first voltage.
Is higher than the terminal voltage of the rechargeable battery 3, the differential amplifier 2
4 outputs a negative voltage, and the first electromagnet 61 is excited.

FIG. 3 is a perspective view showing the appearance of the cordless telephone. Referring to FIG.
A power cord 33 connected to an outlet 32 is led out. By connecting the AC outlet 32 to a commercial AC power supply, an AC voltage is supplied to the telephone body 31. A telephone code 34 is derived from the telephone main body 31, and the telephone code 34 is connected to an office line (not shown). Further, a display panel 35 and various operation keys 36 are arranged on the upper side of the telephone main body 31, and an antenna 37 is protrudingly provided. In addition, a handset recess 38 for mounting a mobile device (hereinafter referred to as a handset unit) 41 is formed in the telephone body 31. The first rechargeable battery 3 and the second rechargeable battery 4 described above are disposed on the bottom surface of the handset recess 38.

On the other hand, an antenna 42 protrudes from the back of the handset 41, and various operation keys (not shown) are provided. A handset 43 and a transmitter 44 are provided on the front face of the handset 41, and a battery storage recess 45 is formed. The battery storage recess 45 connects the handset 41 to the telephone body 31.
The first rechargeable battery 3 and the second rechargeable battery 4 when placed in the handset concave portion 38.

FIG. 4 shows the arrangement of the first rechargeable battery 3 and the second rechargeable battery 4 in the handset recess 38 of the telephone body 31, and FIG. 5 shows AA 'in FIG. The cross section along the line is shown.

On the bottom of the handset recess 38,
Four battery guide plates 71, 72, 73, 74 are projected and four charging terminals 75, 76, 77, 78 made of a conductive elastic body are projected. Where 2
When the first rechargeable battery 3 is positioned and stored between the two battery guide plates 71, 72, the two rechargeable terminals 75,
When the first rechargeable battery 3 is inserted between the two battery guide plates 73 and 74 and the second rechargeable battery 4 is positioned and stored between the other two battery guide plates 73 and 74, the other two rechargeable terminals 7
The second rechargeable battery 4 is inserted between 7, 78. Further, on this bottom surface, the first electromagnet 61 and the second electromagnet 62 shown in FIG. 2 are fixed at respective positions.

FIG. 6 shows the battery storage recess 45 of the handset section 41, and FIG.
The cross section along the line 'is shown.

In the battery storage recess 45, four battery guide plates 81, 81, 82, 82 are provided on the bottom surface so as to project between the battery guide plates 81, 81 and the battery guide plates 82, 82. Can store the first rechargeable battery 3 as described later. Also, four battery guide plates 83, 83, 84, 84 project from the bottom surface, and the second between the battery guide plates 83, 83 and the battery guide plates 84, 84 is described later. Can be stored. The fixed terminal 85 is a conductive elastic body and is fixed to the bottom surface. The floating terminal 86 is a conductive elastic body and a magnetic body, and is freely movably held by two U-shaped guide members 87 protruding from the bottom surface. Further, a rod member 88 is projected from the bottom surface, and the rod member 88 is provided with two coil springs 89, 89.
Are connected to the floating terminal 86 via the. Here, the floating terminal 86 is connected to the rod member 88 by the coil springs 89, 89.
And is held in a state of being pressed against the two guide members 87, 87. The fixed terminal 8
5 and the floating terminal 86 are connected to the conductive line 91 and the conductive line 92.
Are connected to each other, and the fixed terminal 85 and the floating terminal 8 are connected to each other.
When a battery is inserted between the batteries 6, power is supplied from the battery through the conductive wires 91 and 92, whereby the handset unit 41 operates. An electromagnet recess 93 is formed on the side wall of the battery storage recess 45. When the handset section 41 is placed on the handset recess 38 of the telephone body 31, the first electromagnet recess 93 is formed in the electromagnet recess 93. Electromagnet 6
The first and second electromagnets 62 will enter.

When the handset 41 is placed in the handset recess 38 of the telephone body 31 in a state where no battery is stored in the battery storage recess 45 of the handset 41, the fixed terminal in the battery storage recess 45 is set. 85 and the floating terminal 86 enter in a manner as shown in FIG. That is, the fixed terminal 85 is inserted between the first charging battery 3 and the charging terminal 76 in the handset recess 38 and between the second charging battery 4 and the charging terminal 78. The floating terminal 86 is connected to the first rechargeable battery 3 and the second rechargeable battery 3.
And comes into contact with each electrode of the rechargeable battery 4.

At this time, for example, the state of charge of the first rechargeable battery 3 is better than that of the second rechargeable battery 4, and the terminal voltage of the first rechargeable battery 3 is higher than the terminal voltage of the second rechargeable battery 4. If it is high, a positive voltage is output from the differential amplifier 24 shown in FIG. 2, and the second electromagnet 62 is excited. As a result, since the floating terminal 86 is a magnetic material, it is attracted to the second electromagnet 62, and is brought into a tilted state as shown in FIG. That is, when the floating terminal 86 is attracted to the second electromagnet 62, a gap is formed between the floating terminal 86 and the second rechargeable battery 4, and the floating terminal 86 comes into contact with the first rechargeable battery 3. .

In such a state, the floating terminal 86
Is attracted toward the rod member 88 by the coil spring 89, so that the first rechargeable battery 3 is held between the fixed terminal 85 and the floating terminal 86. Here, when the handset unit 41 is lifted from the telephone body 31, the fixed terminal 85
The first rechargeable battery 3 is lifted while the first rechargeable battery 3 is sandwiched between the first rechargeable battery 3 and the floating terminal 86. As a result, the first rechargeable battery 3 is held between the fixed terminal 85 and the floating terminal 86 as shown in FIG.
5, each battery guide plate 81, 81 and each battery guide plate 82,
It is positioned and accommodated between 82. Thus, the handset 41 can receive power from the first rechargeable battery 3 through the conductive wires 91 and 92.

On the other hand, the second rechargeable battery 4 is not sandwiched since a gap is formed between the second rechargeable battery 4 and the floating terminal 86, and is inserted between the respective rechargeable terminals 77 and 78 in the handset recess 38 of the telephone body 31. It will be left as it is and will continue to receive charging.

Next, it is assumed that the first rechargeable battery 3 housed in the battery storage concave portion 45 of the handset 41 is consumed, and the second rechargeable battery 4 is sufficiently charged in the telephone body 31 during that time. . In this state, when the handset section 41 is placed again in the handset concave section 38 of the telephone main body 31, the first rechargeable battery 3, the fixed terminal 85 and the floating terminal 86 in the battery storing concave section 45 become as shown in FIG. Into the handset recess 38 in an appropriate manner.

At this time, the state of charge of the second rechargeable battery 4 is better than that of the first rechargeable battery 3, and the terminal voltage of the second rechargeable battery 4 is higher than the terminal voltage of the first rechargeable battery 3. For example, a negative voltage is output from the differential amplifier 24 shown in FIG. 2, and the first electromagnet 61 is excited. As a result, the floating terminal 86 is attracted to the first electromagnet 61 and the
It is tilted in the opposite direction from the state shown in the figure, so that the floating terminal 86
A gap is formed between the first charging battery 3 and the floating terminal 86, and the floating terminal 86 comes into contact with the second charging battery 4. When the handset 41 is lifted from the telephone body 31 in such a state, the second rechargeable battery 4 is lifted while the second rechargeable battery 4 is sandwiched between the fixed terminal 85 and the floating terminal 86. As a result, the second rechargeable battery 4 is
The battery guide plates 83, 83 and the battery guide plates 8 of the battery storage recess 45 are held between the battery 5 and the floating terminals 86.
It is positioned and accommodated between 4,84. Since the first rechargeable battery 3 is not sandwiched between the fixed terminal 85 and the floating terminal 86, the first rechargeable battery 3 is left inserted between the respective charging terminals 75 and 76 in the handset concave portion 38 of the telephone main body 31, and is charged. It will be.

Therefore, each time the handset section 41 is placed in the handset recess 38 of the telephone body 31, the first rechargeable battery 3 is inserted between the charging terminals 75 and 76 and the second rechargeable battery 3 is inserted. 4 is each charging terminal 77,7
The charging state of the two batteries is compared between the two. When the handset unit 41 is lifted, the rechargeable battery in a good charge state is
1 is transferred to the handset unit 41 and stored.
For this reason, when the handset unit 41 placed on the telephone body 31 is lifted and used, it is ensured that a call with a battery in a good charge state is started.

In the above embodiment, one of the two rechargeable batteries is carried by the handset unit. However, three or more rechargeable batteries are provided in the telephone body, and these rechargeable batteries are provided. Any one of them may be selectively carried by the handset unit. The mechanism is not limited to a mechanism using an electromagnet, and may be any mechanism as long as the handset unit can carry any one of a plurality of rechargeable batteries. Furthermore, it is not limited to a cordless phone, but a body corresponding to the phone body,
The present invention can be applied to any electronic device as long as the mobile device corresponding to the handset unit is provided and the mobile device can operate when the mobile device is lifted from the main body.

[0033]

As described in detail above, the first invention charges each of a plurality of battery power sources arranged in the mounting area of the main body and compares the charging states of the respective battery power sources. When a mobile device with a good charge state is selected, and the mobile device is detached from the mounting area of the main body, one of the plurality of battery power sources arranged in the mounting area is selected. Since the mobile device is configured to be pinched, the operation of the mobile device by the battery power supply in a good charge state is guaranteed.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a battery power supply exchange device according to the present invention.

FIG. 2 is a circuit diagram showing a configuration of a voltage comparison circuit and a power supply selection circuit in the device shown in FIG.

FIG. 3 is a perspective view showing the appearance of a cordless telephone to which the device of the embodiment is applied.

FIG. 4 is a plan view showing a part of a recess for a handset in the telephone body of the cordless telephone shown in FIG. 3;

FIG. 5 is a diagram showing a cross section taken along the line AA ′ in FIG. 4;

FIG. 6 is a plan view showing a battery storage recess of the cordless telephone shown in FIG. 3;

FIG. 7 is a view showing a cross section along a line BB ′ in FIG. 6;

FIG. 8 is a diagram used to explain a process when a rechargeable battery is transferred from a telephone body to a handset unit.

FIG. 9 is a diagram used to explain a process when a rechargeable battery is transferred from a telephone body to a handset unit.

FIG. 10 is a diagram showing an aspect when a rechargeable battery is stored in a handset unit.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Rectifier circuit, 2 ... Voltage comparison circuit, 3 ... 1st rechargeable battery, 4 ... 2nd rechargeable battery, 5 ... Power supply selection circuit, 31 ... Telephone main body, 38 ... Handset recessed part, 41 ... Handset part, 45 ... recess for battery storage, 61 ... first electromagnet,
62: second electromagnet, 75, 76, 77, 78: charging terminal, 85: fixed terminal, 86: floating terminal, 87: guide member, 88: rod member, 89: coil spring.

Claims (2)

(57) [Scope of request for utility model registration] 1. An electronic apparatus comprising: a main body; and a mobile device detachably mounted on a mounting area of the main body and holding the battery power when detached from the main body. A charging unit configured to charge a plurality of battery power sources arranged in the storage area, and a selection unit configured to compare charging states of the plurality of battery power sources and select a battery power source having a good charging state, The mobile device, when being detached from the mounting area of the main body, holding means for selectively holding the battery power selected by the selecting means among a plurality of battery powers provided in the mounting area. An electronic device comprising: 2. The main body includes: a plurality of electromagnets respectively corresponding to the plurality of battery power sources; and an exciting unit that excites an electromagnet corresponding to the battery power source selected by the selection unit. 2. The electronic apparatus according to claim 1, wherein at least one of the induction terminals sandwiching the battery power source selected by the selection unit is crimped to the battery power source by excitation of the excitation unit.