JPH05300663A - Charger for mobile station - Google Patents

Abstract

PURPOSE:To provide an excellent cordless telephone device in which quick charge current is supplied for charging the charge-type battery of a mobile station in a short time from the battery built in a charger by building the charge-type battery in the charger and charging it with current at all times, in the cordless telephone. CONSTITUTION:The charge-type battery 13 built in a charger 3 is charged at all times by a power unit 4 such as an AC adaptor, or the like. To charge the battery 8 of a mobile station 2, the mobile station 2 is charged by the charger 3, so a quick charge current is supplied to the battery 8 built in the mobile station 2 from the battery 13 built in the charger 3, thus the charge can be completed in a short time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a charger for charging a rechargeable battery incorporated in a mobile station of a cordless telephone device.

[0002]

2. Description of the Related Art FIG. 2 shows an example of a conventional cordless telephone device, 1 is a base station of the cordless telephone device, 2 is a mobile station communicating with the base station 1 via a wireless line, 3 is a charger, 4
Is a power supply device that supplies power during charging, 5 and 6 are antennas, and 7 is a wireless line, that is, a radio wave. Further, 8 is a rechargeable battery which is a power source of the mobile station, 9 is a quick call detection circuit, 10 is a control circuit, 11 is a wireless circuit, and 12 is a current from a charger for charging the rechargeable battery of the mobile station. It is a contact for supplying.

Next, the operation of the above conventional example will be described.
In the cordless telephone device, when charging the rechargeable battery 8 of the mobile station 2, the mobile station 2 is charged by the charger 3.
At that time, the charging current is supplied from the power supply device 4 through the contact 12 from the charger 3 having a charging circuit including a resistor,
The battery 8 of the mobile station 2 can be charged.

While the mobile station 2 is being charged by the charger 3, the transistor of the quick call detection circuit 9 is turned on and the low level signal is input to the control circuit 10. When the mobile station 2 is lifted from the charger 3 to start a call, the transistor of the quick call detection circuit 3 turns off.
Then, a high level signal is input to the control circuit 10. When a high level signal is input to the control circuit 10, the quick call transmission state is entered. As described above, even in the above-mentioned conventional cordless telephone device, the battery is charged when the mobile station is placed in the charger, and when the mobile station is lifted from the charger, it has a quick call function that automatically shifts to the call state. There is.

[0005]

However, in the above-mentioned conventional cordless telephone apparatus, when a rechargeable battery of a mobile station is charged in a short time, a large current such as a rapid charging current is required, There is a problem in that the power supply device must be upsized. In addition, if there is a power failure during charging of the rechargeable battery of the mobile station, the charging current is cut off, the quick call detection circuit malfunctions, and the quick call state is entered.

The present invention solves such a conventional problem, and a rechargeable battery of a mobile station is charged in a short time by incorporating a rechargeable battery in a charger and constantly charging the battery. A quick charging current for charging is supplied from a rechargeable battery of the charger to complete charging in a short time. Also, if there is a power outage while charging the rechargeable battery of the mobile station, it is an excellent cordless phone that can continuously supply the charging current until the rechargeable battery built into the charger runs out. It is intended to provide a mobile station charger for a device.

[0007]

According to the present invention, in order to achieve the above object, a rechargeable battery is built in a charger and always charged by a current supplied from a power supply device. When the rechargeable battery of the mobile station is charged, rapid charging current is supplied from the rechargeable battery of the charger to perform rapid charging, and the charging is completed in a short time.

Further, in the case where a power failure occurs during charging of the rechargeable battery of the mobile station, the charging current can be continuously supplied until the rechargeable battery built in the charger runs out. Is.

[0009]

The present invention has the following actions due to the above-mentioned configuration.

The battery of the charger is constantly charged by the current supplied from the power supply device. When the mobile station is charged by the charger to charge the battery of the mobile station, a large current such as a quick charging current is supplied from the battery of the charger to the battery of the mobile station, and charging can be completed in a short time. it can. Therefore, the power supply device does not need to supply a large current such as a rapid charging current, and thus can be small.

Further, according to the present invention, when a power failure occurs during charging of the rechargeable battery of the mobile station, the charging current is continuously supplied until the rechargeable battery built in the charger runs out. Can be supplied.

Therefore, there is no possibility that the charging current is cut off due to a power failure, the quick call detection circuit malfunctions, and the quick call state is entered.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of an embodiment of the present invention. In FIG. 1, the configuration of the reference numerals 1 to 12 is as shown in FIG.
And 13 is a rechargeable battery built in the charger,
Reference numeral 14 is a charging circuit for charging the battery of 13. Next, the operation of the above embodiment will be described. The rechargeable battery 13 built in the charger 3 is a power supply device 4 such as an AC adapter.
Is always charged by. When the mobile station 2 is charged by the charger 3 in order to charge the battery 8 of the mobile station 2, a rapid charging current is supplied from the battery 13 incorporated in the charger 3 to the battery 8 incorporated in the mobile station 2 Charging can be completed in time. Therefore, the power supply device 4 does not need to supply a large current such as a quick charging current, and thus can be small. Further, while the mobile station 2 is being charged by the charger 3, the transistor of the quick call detection circuit 9 is turned on and the low level signal is input to the control circuit 10. When the mobile station 2 is lifted from the charger 3 to start a call, the transistor of the quick call detection circuit 9 is turned off and a high level signal is input to the control circuit 10. Control circuit 10
When a high-level signal is input to, a quick call outgoing state is entered. If a power failure occurs while the mobile station 2 is being charged by the charger 3, the charging current from the power supply of the power supply device 4 is stopped, but the charging current is continuously supplied by the battery 13 built in the charger 3. You can Therefore, even if the charging current is cut off due to a power failure, the quick call detection circuit 10 does not malfunction and does not make a quick call.

[0014]

EFFECTS OF THE INVENTION The present invention has the following effects, as is apparent from the above embodiments. (1) Since the charger has a built-in rechargeable battery and is constantly charged, when charging the rechargeable battery of the mobile station, a quick charge current can be supplied from the battery of the charger, Can be charged in a short time. (2) Since the rapid charging current can be supplied from the battery of the charger, the power supply device can be downsized because it is not necessary to supply a large current such as the rapid charging current. (3) Even if a power failure occurs during charging of the rechargeable battery of the mobile station, the charging current can be continuously supplied by the battery built in the charger. (4) Even if a power failure occurs during charging of the rechargeable battery of the mobile station, the charging current can be continuously supplied from the battery of the charger, so that a quick call cannot be accidentally made.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a mobile station charger according to an embodiment of the present invention.

FIG. 2 is a block diagram showing a configuration of a conventional mobile station charger.

[Explanation of symbols]

 1 base station 2 mobile station 3 charger 4 power supply device 8 rechargeable battery built in mobile station 9 quick call detection circuit 13 rechargeable battery built in charger

Claims (2)

[Claims] 1. A charger for charging a battery of a mobile station wirelessly connected to a base station connected to a telephone line, which has a built-in battery to be charged by a current from a power supply device that supplies power. A mobile station charger characterized by. 2. A charging current is supplied to the battery of the mobile station from the battery built in itself when the current from the power supply device is stopped while the battery of the mobile station is being charged. The mobile station charger according to claim 1.