JPH05130014A - Cordless telephone set - Google Patents

Abstract

PURPOSE:To eliminate improper contact of contact terminals by charging a secondary battery built in a slave set from a master set through magnetic coupling and informing the end of charging of the secondary battery from the slave set to the master set in a radio wave. CONSTITUTION:When it is detected that a slave set 17 is placed on a prescribed position of a master set 16, a control section 25 operates a charging section 20 to start charging to a secondary battery 22 built in the slave set 17 through magnetic coupling between the charging sections 20 and 21 and the display of charging is implemented to a display section 24 to inform the charging state to the user. In this case, a control section 26 detects the charging state of the secondary battery 22 and when the charging is not finished, the charging is succeedingly implemented and when the charging is finished, the end of charging is informed to the control section 25 in a radio wave to the master set 16 via radio sections 19, 18. Upon the receipt of the notice of the end of charging, the control section 25 stops the charging to the slave set 17 and displays the end of charging to the display section 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cordless telephone composed of a master unit and a slave unit with a built-in secondary battery.

[0002]

2. Description of the Related Art A conventional cordless telephone will be described below with reference to the drawings.

FIG. 4 is a block diagram of a conventional cordless telephone. In FIG. 4, 1 is a master unit, 2 is a slave unit, and 12 is a slave unit.
Is a charging unit that outputs DC power, and 13 is a charging unit that regulates the input DC power to a constant voltage.
And the charging unit 13 are connected by the contact terminal 14, and the charging unit 13 is connected to the secondary battery 7.

Reference numeral 8 denotes a slave unit detecting section composed of a micro switch or the like for detecting whether or not the slave unit 2 is placed at a predetermined position of the master unit 1, and 9 denotes a charging operation from the master unit 1 to the slave unit 2. A display unit for indicating to the user the state of the inside and the completion of charging, 10 is a control unit for controlling the wireless unit 3, the charging unit 12, the slave unit detection unit 8 and the display unit 9, and 11 is the wireless unit 4 and the charging unit 13. Is a control unit for controlling.

The operation of the conventional cordless telephone configured as described above will be described below.

In the base unit 1, the handset unit detection unit 8 constantly detects whether or not the handset unit 2 is placed at a predetermined position of the base unit 1, and the handset unit 2 is set to a predetermined position of the base unit 1. When detecting that the battery is placed in the position, the control unit 10 operates the charging unit 12 to generate DC power, and outputs the DC power to the charging unit 13 via the contact terminal 14, and the charging unit 13 inputs the DC voltage. The electric power is regulated to a constant voltage, and charging of the secondary battery 7 is started. Further, in order to inform the user that the charging operation is in progress, the display of the charging operation is displayed on the display unit 7.

The control unit 11 detects the state of charge of the secondary battery 7. If the charging is not completed, the control unit 11 continues charging. If the charging is completed, the control unit 11 of the base unit 1 is instructed. , Notifies that the charging is completed via the contact terminal 15.

When the control unit 10 receives the notification of the completion of charging, it controls the charging unit 12 to stop the charging of the slave unit and to display on the display unit 9 to inform the user that the charging is completed. Displays that charging is complete.

[0009]

However, in the above-mentioned conventional cordless telephone, a contact terminal is required to connect the master unit and the slave unit, and failure due to poor contact occurs due to wear and rust of the contact terminal. There was a problem of doing.

Further, since the contact terminals are attached to the housing,
There was also a problem that it was difficult to ensure waterproofness.

In order to solve the above problems, it is an object of the present invention to provide a cordless telephone that does not require contact terminals.

[0012]

In order to achieve the above object, the present invention is provided with a charging unit for magnetically coupling a secondary battery built in a slave unit from a master unit.

[0013]

According to the present invention, the secondary battery having the built-in slave unit is charged by magnetic coupling by the above-described structure, and the slave unit detects the charging state of the secondary battery and when the charging is completed, the parent unit Since the master unit wirelessly notifies that the charging is completed and the master unit stops charging the slave unit when receiving the notification of the charging completion, the contact terminal becomes unnecessary.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a cordless telephone according to the present embodiment, in which 16 is a master unit, 17 is a slave unit, and 18 and 19 are wireless signals and control signals between the master unit 16 and the slave unit 17. A wireless unit for communication, 20 is a charging unit, 21
Is a charging unit, and the charging unit 20 and the charging unit 21 are magnetically coupled to each other by a transformer or the like, and supplies energy from the charging unit 20 to the charging unit 21, and the charging unit 21 is connected to the secondary battery 22. ..

Reference numeral 23 denotes a slave unit detection unit composed of a micro switch or the like for detecting whether or not the slave unit 17 is placed at a predetermined position of the master unit 16, and 24 is a charging operation from the master unit 16 to the slave unit 17. Reference numeral 25 is a display unit for indicating to the user the state of the inside and the completion of charging, 25 is a control unit for controlling the wireless unit 18, charging unit 20, slave unit detection unit 23 and display unit 24, and 26 is a wireless unit 19
And a control unit that controls the charging unit 21.

FIG. 2 shows an example of the charging unit 20 and the charging unit 21. By turning on / off the transistor 23 of the charging unit 20, a voltage is generated in the coil 24 of the charging unit 21, the rectifying circuit 25 and the smoothing circuit. The secondary battery 22 is charged via 26.

FIG. 3 is a flow chart showing the processing of the cordless telephone configured as described above.
The operation will be described below.

The handset detector 23 always detects whether or not the handset 17 is placed at a predetermined position of the base unit 16 (step 1), and the handset 17 is placed at a predetermined position of the base unit 16. When it is detected, the control unit 25 operates the charging unit 20 and starts the charging of the secondary battery 22 built in the mobile device 17 by the magnetic coupling between the charging unit 20 and the charging unit 21 (step 2) In order to inform the user that the charging operation is in progress, the display of the charging operation is displayed on the display unit 24 (step 3).

The control unit 26 detects the state of charge of the secondary battery 22 (step 4). If the charging is not completed, the charging is continued, and if the charging is completed, the main unit 1
The control unit 25 is informed that the charging has been completed wirelessly to the wireless unit 6 via the wireless units 19 and 18 (step 5).

When the control unit 25 receives the notification of the completion of charging, it stops charging the slave unit 17 (step 6), and displays the completion of charging on the display unit 24 to inform the user that the charging is completed. (Step 7).

[0022]

As described above, according to the present invention, the secondary battery built in the slave unit is charged by magnetic coupling from the master unit, and the secondary battery charging completion notification from the slave unit to the master unit is wirelessly performed. Therefore, the contact terminal between the master unit and the slave unit becomes unnecessary, and the contact failure of the contact terminal, which has been a problem in the past, is eliminated, and the slave unit having high waterproofness can be provided.

[Brief description of drawings]

FIG. 1 is a block configuration diagram of a cordless telephone according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a charging unit of the cordless telephone.

FIG. 3 is a flowchart showing a process of the cordless telephone.

FIG. 4 is a block configuration diagram of a conventional cordless telephone.

[Explanation of symbols]

 16 Master unit 17 Slave unit 18 Wireless unit 19 Wireless unit 20 Charging unit 21 Charging unit 22 Secondary battery 23 Slave unit detecting unit 24 Display unit 25 Control unit 26 Control unit

Claims (1)

[Claims] 1. A cordless telephone comprising a base unit and a handset unit, the handset unit having a wireless unit for generating an electric wave when charging of a built-in battery is completed; a receiving unit for receiving the electric wave; A cordless telephone comprising: a base unit having a notification unit for receiving a signal from a receiving unit and notifying completion of charging.