JPH0570145U - Interlocking power supply device - Google Patents

Abstract

(57) [Summary] [Purpose] When a large number of electronic devices are installed in separate positions, simply turn on / off the power switch of the specific electronic device to start / start other electronic devices. An interlocking power supply device that can be lowered. [Composition] When the power switch 7a of the monitor device (specific device) 7 is turned on, a current flows through the main power circuit 21, but the current detection coil 26 detects the energization of the current and the rectified and smoothed DC voltage is detected. Is applied to the base of the NPN transistor 31 of the switch control circuit 25. The switch control circuit 25 switches the switch circuit (normally open relay) 24 connected to the collector side to the closed state when the transistor 31 is turned on, and switches the branch power supply circuit 22 to which the other electronic devices 8 to 11 are connected. Turn on. Conversely, if the power switch 7a is turned off, the branch power circuit 22
Turns off.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an interlocking type power supply device, which eliminates the need to turn on the power for each device when a large number of devices are arranged at separate positions, and only turns on / off the power of a specific device. Therefore, it relates to a power supply device that enables other devices to be started up / downed at the same time.

[0002]

[Prior Art]

 In recent years, many personal computers, workstations, etc. are deployed in offices and factories, and they are often connected by a network such as a LAN (Local area network). It is becoming commonplace for workers to cycle through the installation locations of electronic devices and turn on the power in preparation for the start of the work day.

Therefore, although it is not so large in a small office or the like, if the electronic devices are arranged in positions apart from each other in a large office or factory, it is very troublesome to turn on the power of each device. Become. In addition, the operator of each electronic device will turn off the power when the work of the day is completed, but it is not uncommon to forget to turn it off.

[0004]

[Problems to be solved by the device]

 By the way, when a network such as a LAN is configured, the electronic devices often operate in conjunction with each other in order to transmit and receive data, and each electronic device is provided with a power switch. However, it is often desirable to turn the power on and off in conjunction with the power supply.

Therefore, the present invention provides a power supply device capable of automatically interlocking with other related devices and switching to a power supply state by simply turning on a power supply to a specific device. It was created with the purpose of eliminating the inconveniences mentioned above.

[0006]

[Means for Solving the Problems]

 The present invention provides a branch power supply circuit that branches from a main power supply circuit that supplies power to a specific device, and supplies power from the branch power supply circuit to another device. An energization detection circuit that detects the energized / de-energized state of the circuit, a switch circuit interposed in the branch power supply circuit, and the switch circuit is set to OFF when the energized detection circuit detects the de-energized state. In addition, the present invention relates to an interlocking type power supply device characterized by comprising a switch control circuit for setting the switch circuit to ON when an energized state is detected.

[0007]

[Action]

 When the power of a specific device is turned on, a current flows through the main power circuit, but the energization detection circuit detects the transition to the energized state. On the other hand, a switch circuit is provided in the branch power supply circuit, and the switch control circuit controls the ON / OFF setting.

Here, since the switch control circuit sets ON / OFF of the switch circuit in accordance with the energization / non-energization detection state of the energization detection circuit, it is interlocked with ON / OFF of the power switch provided in the specific device. Switch circuit turns on and off, and the power supply to the branch power supply circuit turns on and off accordingly. Therefore, if the power switch of a device other than the specific device is always turned on, the other device can be turned on / off by only turning on / off the specific device.

[0009]

【Example】

 Hereinafter, one embodiment of the present invention will be described in detail with reference to FIG. In the figure, 1 is a unitized interlocking type power supply device, which receives a power supply input of AC100V power supply, and is connected to an output outlet 2 via a short AC cord in the vicinity and a long AC cord. Output side outlets 3 to 6 are installed at remote locations. The outlet 2 closest to the power supply device 1 has a monitor device 7 corresponding to a specific device, and the outlets 3, 4, 5 and 6 at the separated positions have workstations 8 and 9 and communication devices 10 and others, respectively. Peripheral device 11 is connected. The monitor device 7 receives the data from the workstation 8 via the communication line, displays the operating states of the other devices 8 to 11, and plays a role of monitoring the overall operation and the data processing state.

On the other hand, the power supply device 1 according to the embodiment includes a main power supply circuit 21 for connecting the input AC power supply to the outlet 2 side and a branch power supply circuit 2 for connecting to the outlets 3, 4, 5 and 6. 2, the main power supply circuit 21 has an energization detection circuit 23 interposed, and the branch power supply circuit 22 has a switch circuit (normally open contact type relay) 24 interposed. The relay 24 is controlled by the switch control circuit 25, and the switch control circuit 25 turns the relay 24 ON / OFF in response to the energization / non-energization state by the energization detection circuit 23.

Next, the operation of the interlocking type power supply device 1 when the monitor device 7 is started up will be described. When the power switch 7a of the monitor device 7 is turned on, a current flows through the main power supply circuit 21, but the energization detection circuit 23 includes a current detection transformer 26 having a small primary coil impedance in the main power supply circuit 21. It is interposed and detects the above-mentioned energization as the voltage of the secondary coil. Then, the voltage is full-wave rectified by the diode bridge 28 via the current limiting resistor 27, smoothed by the capacitor 29, and then output to the switch control circuit 25. The resistor 30 is a current limiting resistor, and the Zener diode 31 is provided for constant voltage compensation.

The rectified / smoothed DC voltage is input to the base of the NPN transistor 31 of the switch control circuit 25 via the base bias resistor 32, and a base current is caused to flow to turn on the transistor 31. On the other hand, since the relay 24 is a normally open relay, the branch power supply circuit 22 is normally in the OFF state, but when the transistor 31 is in the ON state as described above, the collector current flows and the reverse connection is made to the collector. A voltage drop occurs in the diode 33 that is being operated, and the voltage causes a current to flow in the coil of the relay 24, causing the relay 24 to switch to the closed contact state.

As a result, the branch power supply circuit 22 is turned on, and AC 100V power is supplied to the outlets 3 to 6 at the separated positions. That is, if the power switches of the workstations 8-11 connected to the outlets 3-6 are set to the ON state, those devices 8-11 can be turned on by simply turning on the power switch 7a of the monitor device 7. It can be started up in conjunction with each other.

On the contrary, when the power switch 7a of the monitor device 7 is turned off, the current does not flow in the main power circuit 21, whereby the transistor 31 is turned off and the relay 24 is returned to the original open contact state. Since the switching is performed, the workstations 8 to 11 can be switched to the OFF state in synchronization with the monitor device 7.

The drive power for the switch circuit 25 and the relay 24 can be supplied by a battery, but a drive power supply for transforming, rectifying, and smoothing the AC100V power supply supplied to the interlocking power supply device 1. A circuit (not shown) may be provided and the drive voltage may be constantly supplied from the circuit.

[0016]

[Effect of the device]

 Since the interlocking type power supply device of the present invention has the above configuration, other devices connected to the branch power supply circuit can be obtained by simply turning on / off a specific device connected to the main power supply circuit. Can be turned on and off in conjunction with each other, and when electronic devices are placed in remote locations due to heat generation or noise in offices or factories, or due to restrictions such as the size of the device itself, each device This eliminates the hassle of turning on the power to the power supply and prevents the power from being wasted by forgetting to turn off the power switch of each device.

[Brief description of drawings]

FIG. 1 is an electric circuit diagram of an interlocking power supply device of the present invention and a diagram showing a connection relationship between the device and an external device.

[Explanation of symbols]

1 ... Interlocking power supply, 2,3,4,5,6 ... Outlet, 7 ...
Specific device (monitor device), 7a ... Power switch of monitor device, 8, 9, 10, 11 ... Other device other than specific device, 21 ... Main power circuit, 22 ... Branch power circuit, 23 ... Energization detection circuit, 24 … Switch circuit (normally open type relay), 25… Switch control circuit.

Claims (1)

[Scope of utility model registration request] 1. A power supply device that supplies a power from a main power supply circuit that supplies power to a specific device and that supplies power to another device from the main power supply circuit. An energization detection circuit that detects the energized / de-energized state, a switch circuit interposed in the branch power supply circuit, and if the energized detection circuit detects the de-energized state, set the switch circuit to OFF An interlocking type power supply device comprising a switch control circuit for setting a switch circuit to ON when a state is detected.