JPH0514691Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) This invention relates to a power supply device that supplies operating power to electrical equipment from an external power source via a connection cord.

(Prior Art) Conventionally, in electrical equipment that receives operating power from an external power supply with a built-in power battery via a connection cord, the internal circuit of the electrical equipment or external power supply is connected via a power switch of the external power supply. Normally, DC power is supplied to the

In addition, as a power supply device that receives external power supply through a connector, a board equipped with a battery for backing up the power supply is connected to the external power supply through the connector, and the backup power supply can be operated by removing the connector. There were some devices in which the power supply from the battery could be cut off (for example, see Japanese Patent Publication No. 59-36494).

(Problem that the invention aims to solve) However, in the first conventional technology mentioned above, if you forget to turn off the power switch of the external power supply after using the electrical equipment, the internal circuit of the electrical equipment or external power supply will There was a problem that the power supply battery was wasted because it was consumed continuously.

Furthermore, in the second conventional technology mentioned above,
To cut off the power supply to two devices connected to each other by a connector, that is, the external power supply and the board, it is necessary to remove the connector and turn off the power switch provided on the external power supply side. However, there was a problem in that it required double effort.

Therefore, this invention was devised to solve the above-mentioned conventional problems, and its purpose is to remove the power from the user by either turning off the power switch or unplugging the connector of the connecting cord. A power supply device that can cut off the power supply to both the external power source and the power device connected to it with the connection cord, and prevents the power battery from draining even if you forget to turn off the power switch. It is to provide.

(Means for solving the problems) This invention will be explained below based on the drawings. 1st
The figure is a circuit block diagram of the main part of this invention.
In FIG. 1, an external power source 1 has a built-in power source battery 2, a power source switch 3, and an internal circuit 4. As shown in FIG.
Power is supplied to the electrical equipment 5 via a connection cord 6. At least one end of the connection cord 6 is detachably connected to a connector 9 of the external power source 1 or a connector 10 of the electric device 5 through connectors 7 and 8.
And the connection pins 13 and 14 are short-circuited,
By connecting the connectors 7 to 10, the power supply path 11 following the power switch 3 is closed only in this connected state. In addition, power is supplied from the power source battery 2 to the internal circuits of the electric device 5 and the external power source 1.

(Function) Next, the function will be explained.

When the connectors 7 to 10 are connected, the power supply to the internal circuit 4 and the internal circuit 12 is cut off by opening the power switch 3. Furthermore, as shown in FIG. 1, even if the power switch 3 remains closed, the connectors 7 and 9 or 8
If any one of the connections between and 10 is released, the power supply path 11 is released. In this state, power is not supplied from the power supply battery 2 to the electrical equipment 5 or the internal circuit 4. That is, even if you forget to turn off the power switch 3 and leave it on, by separating the connection cord 6, unnecessary consumption of the power supply battery 2 can be prevented.

(Embodiment) Next, an embodiment of this invention will be described in more detail based on FIG. 1 and FIG. 2. As a power supply device, for example, a two-piece wireless
In the case of a microphone, the electric device 5 corresponds to an electret condenser type microphone, and the external power supply 1 corresponds to a transmitting unit containing a transmitting circuit 4 and a dry battery 2. In addition, the invention can be applied to small portable wireless transceivers, tape recorders, headset microphones, and camera strobes.

The internal circuit 12 of the electrical device 5 and the internal circuit 4 of the external power supply 1 are connected by connectors 7 to 10 and a connection cord 6 to transmit input/output signals, control signals, and the like. The first pin 13 and the second pin 14 from the bottom in FIG. 1 of the connectors 7 to 10 are used to open and close the power supply path 11, and the pins 13 and 14 of the connector 10 are connected.

When the connectors 7 to 10 are connected and the power switch 3 is closed, power is supplied to the internal circuit 12 of the electrical device 5 via the power battery 2, the power switch 3, and the first pin 13 of the connectors 9, 7, 8, and 10. is supplied. Furthermore, power is supplied to the internal circuit 4 of the external power supply 1 via the second pin 14 of the connectors 10, 8, 7, and 9.

Power supply to internal circuit 4 and internal circuit 12 is normally cut off by opening power switch 3, but even if you forget to turn off power switch 3, connectors 7 and 9 or 8 and 10 When either one of the connections is released, the power supply path 11 is released midway. Therefore, even if the power switch 3 is closed, power is not supplied from the power battery 2 to the internal circuits 4 and 12.

Therefore, even if the power switch 3 is left in a state where the user forgets to turn it off, by disconnecting the connector 7 or 8 at one end of the connection cord 6, unnecessary consumption of the power battery can be prevented.

(Effects of the invention) As explained above, according to this invention, in a power supply device in which operating power is supplied from an external power source to an electrical device via a connection cord, the power switch 3 is opened or connected. By unplugging one of the cord connectors, you can cut off the power supply to both devices connected by the connecting cord, simplifying the trouble of turning off the power and forgetting to turn off the external power switch. Even if the battery is left unattended, the power supply can be cut off by untying the connection cord, which prevents unnecessary consumption of the power battery and allows it to be used effectively. Remarkable practical effects can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a circuit block diagram of a power supply device embodying this invention, and FIG. 2 is an external view of the same. 1...External power supply, 2...Power battery, 3...Power switch, 4, 12...Internal circuit, 5...Electrical equipment, 6...Connection cord, 7-10...Connector,
11... Power supply path, 13, 14... Connection pin.

Claims (1)

[Scope of utility model registration request] In a power supply device in which operating power is supplied to an electrical device via a connection cord from an external power source having a built-in power supply battery, a power switch, and an internal circuit, at least one end of the connection cord can be attached and detached to a connector. connection, two of the connection pins of the connector on the electrical equipment side are short-circuited,
One of the connection pins of the connector on the external power supply side corresponding to these two pins is connected to the power switch, and the other is connected to the internal circuit, and only when this connector is connected, the power switch is connected from the power battery. A power supply device characterized in that a power supply path that continues after passing through the power source is closed, and power is supplied from the power source battery to the internal circuits of the electric device and the external power source.