KR200318706Y1 - Multi-tap apparatus - Google Patents

Abstract

Disclosed is a multi-tap device capable of detecting and supplying current supplied through a master connector to supply and cut off power to a slave connector. The multi-tap device includes at least one slave connector connected in parallel with the master connector to selectively receive power from the power cord, an interlock switch installed to turn on / off electrical connection from the power cord to the slave connector, and a master The current detector detects the current supplied to the main system through the connector, the rectifier rectifies and outputs the current output from the current detector, and the signal output from the rectifier is compared with the set reference signal. And a linkage adjustment unit configured to control on / off. According to such a multi-tap device, power supply and disconnection control can be made stable by rectifying a signal detected corresponding to a current supplied to a master device connected to a master connector to determine whether to supply power to a slave connector. There is an advantage.

Description

Multi-tap apparatus

The present invention relates to a multi-tap device, and more particularly, to a multi-tap device to be able to control the power supply to the auxiliary device through the slave connector according to the operating state of the main device connected to the master connector.

In order to supply commercial AC power to a large number of electronic devices, a multi-tap device that can supply power input through a power cord in parallel to a plurality of connectors is commercially available.

In such a multi-tap device, a power supply cord and a plurality of connectors are usually connected in parallel with each other, and a power supply switch capable of intermittently supplying current from the power supply cord to each connector is provided.

On the other hand, the computer system allows users to connect and use various peripheral devices such as monitors, printers, scanners, modems, etc. in addition to the main body of the computer, and to install such a computer system in a limited space, an outlet intermittently installed in a house or building. The power strip device is usefully used for the purpose of dividing the power from each device to each device.

Peripherals of such a computer system can perform their functions only when the computer main body is operated. When the computer main body is turned off, power consumption is generated. In addition, the computer that supports the power saving mode is operated to minimize the power consumption when the user is not used for a long time even when the main body of the computer, and even in this case, unnecessary power consumption occurs when the power supply to the peripheral devices is maintained.

Therefore, when the user completes the use of the computer system or operates in the power saving mode, it is necessary to turn off the peripheral devices connected to the computer main body to suppress unnecessary power waste. However, it is inconvenient for the user to operate all the power switches of the peripheral devices whenever the computer system is driven and turned off or in the power saving mode, and the peripheral devices are not turned off when the computer is not in use. Many will waste unnecessary power.

In the Korean Utility Model Registration No. 0276671 proposed and registered by the present applicant to solve such a problem, a multi-tap device capable of reducing power consumption required for interlocking control between a master connector and a slave connector is disclosed.

On the other hand, the multi-tap device proposed by the present applicant is to detect the current supplied to the main device through the master connector in analog phase, and to control the slave connector in accordance with the detected current signal, the interlock control by the ripple of the detection signal There is a disadvantage in that the decision range is widened and the circuit design constraints increase.

The present invention was devised to improve the above problems, and an object thereof is to provide a multi-tap device capable of increasing the stability and precision of interlocking control between a master connector and a slave connector.

1 is a perspective view schematically showing a multi-tap device according to the present invention,

2 is a diagram illustrating an interlocking control circuit according to a preferred embodiment of the power strip apparatus of FIG. 1.

<Description of the reference numerals for the main parts of the drawings>

100: power strip device 120: always supply connector

130: master connector 140: slave connector

150: light emitting element 155: interlock switch

160: current transformer 165: rectifier

170: control unit

In order to achieve the above object, the multi-tap device according to the present invention includes a master connector connected to a power cord; At least one slave connector connected in parallel with the master connector to selectively receive power from the power cord; An interlock switch provided to turn on / off an electrical connection from the power cord to the slave connector; A current detector for detecting a current supplied to the main system through the master connector; A rectifier for rectifying and outputting a current output from the current detector; And a linkage adjustment unit configured to compare the signal output from the rectifier with a set reference signal and to control on / off of the linkage switch according to a comparison result.

Preferably, the interlock switch is a relay switch that is turned on / off according to a current supply, and the interlock adjustment unit includes a relay switch installed to turn on or off a current supply to the interlock switch; And a controller configured to convert the signal output from the rectifier into a digital signal, compare the converted digital signal with a reference signal, and control the relay switch on / off according to a comparison result.

The apparatus may further include a light emitting device installed to supply and cut off power from the power cord according to a switch on / off of the interlock switch to display the on / off state of the interlock switch to the outside.

More preferably, at least one or more normally supplied connector which is connected in parallel with the master connector can receive the constant power from the power cord.

Hereinafter, a multi-tap device according to a preferred embodiment of the present invention with reference to the accompanying drawings will be described in more detail.

1 is a perspective view schematically showing a multi-tap device according to the present invention.

Referring to the drawings, the power strip device 100 includes a power cord 105, a power cord 105, and a power strip body 101 connected through an electric wire cable 103.

The power cord 105 is provided with first and second alternating input terminals 105a and 105b and a ground connection terminal 105c. Of course, the power cord 105 is provided with only the first and second AC input terminal can be applied.

The power supply body 120, the master connector 130, and the plurality of slave connectors 140 are exposed to the power strip main body 101 so as to insert a power plug of another electronic device.

An interlock control circuit (not shown) for controlling the supply of current from the power cord 105 to each of the slave connectors 140 is provided inside the main body 101.

The connector 120 is always connected to receive power from the power cord 105, and may be omitted.

In the drawing, reference numeral 150 denotes a light emitting device indicating whether power is supplied to the slave connector 140, reference numerals 121, 131, and 141 denote terminals capable of being connected or selectively connected to the first AC input terminal 105a. Reference numerals 122, 132, and 142 denote terminals provided to be connected to or selectively connected to the second AC input terminal 105b, and 123 denotes terminals connected to the ground connection terminal 105c. Reference numerals are omitted for the ground terminals of the master connector 130 and the slave connector 140 to avoid the complexity of the drawing.

It goes without saying that the number of normally supplied connectors 120 and slave connectors 22 can be appropriately determined.

An example of an interlocking control circuit for controlling interlocking of the slave connectors 140 with respect to the master connector 130 of the multi-tap device 100 is illustrated in FIG. 2.

For reference, in FIG. 2, in order to avoid the complexity of the drawing, the ground connection line from the ground connection terminal to the ground terminal of each connector 120, 130, 140 and the connection system line of the corresponding terminal are omitted.

Referring to the drawings, the interlocking control circuit controls the relay switch 155 and the relay switch 155 installed to turn on / off the power supply to the slave connectors 140 connected in parallel with the master connector 130. It is provided with an interlocking adjustment part.

The master connector 130 is connected in parallel to the supply lines 103a and 103b connected to the AC input terminals 105a and 105b of the power cord 105, respectively.

Each terminal of the slave connectors 140 is directly connected in common with the first supply line 103a of the two supply lines 103a and 103b and is common with the second supply line 103b via the relay switch 155. Is connected.

Although not shown, a main power switch capable of interrupting the first supply line 103a or the second supply line 103b may be installed. In this case, it is preferable that the main power switch is installed to be exposed on the power strip main body 101 to enable user operation.

Reference numeral 111 is a power rectifier branched from the supply lines 103a and 103b to rectify the AC power supplied from the commercial AC power supply through the first and second AC input terminals 105a and 105b, Reference numeral 113 is a constant voltage unit for controlling the DC power generated by the power rectifier 23 to a constant voltage of a desired level.

In the constant voltage unit 113, a plurality of zener dies 113a and 113b are applied to suppress voltage fluctuations. The voltage regulated by the first zener diode 113a of the constant voltage unit 113 is used for supplying power to the relay switch 155, and the current limiting resistor Rc2 is transferred from the first zener diode 113a. The voltage regulated by the second zener diode 113b connected to generate a constant voltage at a predetermined level is used as a power source of the controller 170.

In the illustrated example, the first Zener diode 113a generates 12 volts, and the second Zener diode 113b generates 5 volts, which is a general IC driving voltage.

Unlike the illustrated example, the constant voltage unit 113 is formed by one zener diode and a smoothing capacitor, and the output voltage can be used as a power supply for the relay switch 155 and a driving power source for the controller 170. Of course, the circuit can be configured.

Reference numeral RC1 is a resistor for current limiting.

Reference numeral 160 is a current transformer applied as a current detector. The current transformer 160 is a well-known element, and the branch line 135 is wound in a coil form outside the branch line 135 branched from one of the supply lines 103b to the master connector 130, or, alternatively, to increase the sensitivity. The wire is wound in a coil shape in a predetermined shape, for example, in a ring-shaped magnetic material having an opening in the center thereof, so that the branch line 135 is installed to penetrate the opening. The current transformer 160 is also commonly referred to as an inductive current detector or a probe-type current detector, and is a branch line by an induction-sensitive method by electromagnetic force generated by a current flowing through the branch line 135 to the detection target master connector 130. The current flowing in 135 is indirectly detected.

The rectifier 165 rectifies the current output from the current transformer 160 and outputs the rectified current to the controller 170. The rectifier 165 smoothes the current signal of the AC phase that is output in response to the current transformer 160 and outputs a DC phase signal corresponding to the average value.

The relay switch 155 is applied as an interlocking switch and is provided so that the power supply path from any one supply line 103b to the slave connector 140 can be interrupted.

The interlocking control unit includes a relay switch 180 and a control unit 170.

The relay switch 180 is controlled by the controller 170 to supply and cut off the current to the relay switch 155.

The controller 170 compares a signal input from the current transformer 155 through the rectifier 165 with a set reference signal, and controls the relay switch 180 on / off according to the comparison result.

The control unit 170 compares the signal output from the analog-to-digital converter (not shown) for converting the current detection signal output from the rectifier 165 into a digital signal, the analog-to-digital converter with a set reference signal and the comparison result Comparing part (not shown) for outputting a corresponding control signal to the relay switch 180.

More preferably, a microcomputer having a control unit 170, an analog-to-digital converter and an operator, and a memory device capable of adjusting a comparison reference signal by a program is applied.

The level of the reference signal may be appropriately determined in consideration of the inductive sensitivity of the current transformer 160 and the power consumption in the non-use or power saving mode of the master device to be applied to the master connector 130.

The operation of the multi-tap device 100 will be described.

First, when the current supply through the master connector 130 is smaller than the set reference level, the controller 170 controls the relay switch 180 to be turned off so that the relay switch 155 maintains the turn-off state, and the light emitting device ( 150 is off.

In this case, the non-light emitting state of the light emitting device 150 serves to inform that the slave connector 140 is in an off connection state.

On the other hand, when the master device connected to the master connector 130 is turned on or switched from the power saving mode to the operation mode, the current corresponding to the operating load of the master device through the branch line 135 through the master connector 130 Is supplied. Then, the current flowing through the branch line 135 rises to a value corresponding to the operation load of the master device, and the electromagnetic energy induced by the current transformer 160 responding to the increase increases. As a result, when the voltage induced by the current transformer 160 and rectified by the rectifier 165 becomes higher than the set reference level, the controller 170 turns on the relay switch 180. At this time, the current is supplied to the relay switch 155 so that the relay switch 155 is turned on, thereby enabling power supply to the slave connector 140, and the light emitting device 150 is turned on. That is, the relay switch 155 is turned on by the output signal of the current transformer 160 responding to the current rising / falling of the branch line 135 corresponding to the operation / non-operation of the master device connected to the master connector 130. On / off

On the other hand, a relay switch of the type opposite to the above method, that is, a relay switch that is turned off when the current is applied, may be applied.

Such a multi-tap device can be used for power supply control in addition to a computer and its peripherals, for example, various electronic products used in mutual dependence, such as a television and a video player.

As described so far, according to the multi-tap device according to the present invention, power is supplied by rectifying a signal detected corresponding to a current supplied to a master device connected to a master connector to determine whether to supply power to a slave connector. And there is an advantage that the blocking control can be made stable.

Claims (5)

A master connector connected to the power cord; At least one slave connector connected in parallel with the master connector to selectively receive power from the power cord; An interlock switch provided to turn on / off an electrical connection from the power cord to the slave connector; A current detector for detecting a current supplied to the main system through the master connector; A rectifier for rectifying and outputting a current output from the current detector; And an interlocking adjustment unit configured to compare the signal output from the rectifying unit with a set reference signal and to control on / off of the interlocking switch according to a comparison result. According to claim 1, wherein the interlock switch is a relay switch that is turned on / off according to the current supply, The interlocking adjustment unit A relay switch installed to turn on or off a current supply to the interlock switch; And a controller for converting the signal output from the rectifier into a digital signal, comparing the converted digital signal with a reference signal, and controlling the relay switch on / off according to a comparison result. The multi-tap apparatus according to claim 2, wherein the controller is a microcomputer that can program and adjust the reference signal value. The light emitting device of claim 2, further comprising: a light emitting device installed to supply and cut off power from the power cord according to a switch on / off of the interlock switch to indicate an on / off state of the interlock switch to the outside. Multi-tap device, characterized in that. The multi-tap apparatus according to claim 1, further comprising: at least one always-supply connector connected in parallel with the master connector to receive constant power from the power cord.