JP4456031B2 - Standby power cutoff device - Google Patents

Description

  The present invention relates to a standby power cut-off device, and more particularly, to a standby power cut-off device that makes a standby power of the device itself zero by completely shutting off a main power supply during a standby operation.

As shown in FIG. 3, the standby power supply device in the prior art includes a standby power supply circuit 111 connected to a commercial AC power supply AC and a main power supply circuit 112 that supplies power as an internal power supply for a television receiver or the like. Has been.
The standby power supply circuit 111 connects the primary side of the standby transformer T2 to the commercial AC power supply AC, thereby generating a standby AC voltage on the secondary side thereof. The standby AC circuit 111 rectifies the AC voltage by the rectifier circuit D1, and the smoothing capacitor C1. By smoothing, a DC voltage, that is, a DC power supply of 12V can be obtained.

  This DC power supply is connected to the relay coil 114 of the latching relay 113 and the input side of the stabilized power supply circuit REG including a voltage regulator for obtaining a 5V stabilized power supply, and the output of the stabilized power supply circuit REG is received by the remote control. By supplying the power to the unit 116 and the power supply terminal of the microcomputer 117, the remote control light receiving unit 116 and the microcomputer 117 are always in the remote control standby state.

  In this state, when the remote control light receiving unit 116 receives the power ON operation control signal from the remote control transmitter, this control signal is input to the control terminal (6) of the microcomputer 117, and the control terminal (14) of the microcomputer is changed from 0V to 5V. The relay drive transistor 118 is turned on through the resistor R1.

In this way, the relay coil 114 of the latching relay 113 operates and the relay switch 115 is closed, whereby the commercial AC power supply AC and the main rectifier circuit D2 of the main power supply circuit 112 are connected, and the DC voltage is applied by the smoothing capacitor C2. A DC power source that is generated and supplied to various electronic circuits via the transformer T1 can be obtained.
In the main power supply circuit 112, the secondary side of the transformer T1 is connected to a rectifier circuit composed of diodes D4 and D5 and smoothing capacitors C4 and C5, respectively.

  A series of these operations is performed by the microcomputer 117, and the power supplied to the microcomputer 117 always supplies the direct current 5 V of the standby power supply circuit 111. In order to operate the main power supply circuit 112, the 12 V DC power of the standby power supply circuit 111 must be continuously supplied to the relay coil 114 of the latching relay 113. For this reason, the supply power of the standby power supply circuit 111 differs between the standby state and the state where the main power supply circuit 112 is operated.

Japanese Patent Laid-Open No. 2001-37235 (page 2, FIG. 2)

However, in the standby power supply device of the prior art described in the background section above, the standby power supply circuit is driven to generate a predetermined signal voltage, for example, 5 V during standby. The circuit is configured to be supplied with power from a commercial AC power source. For this reason, power is supplied from a commercial AC power supply even during standby, and this is because electronic devices equipped with a standby power supply are always supplied from a commercial AC power supply even when the power is off. This wasteful current consumption results in a short time of use, and there is a problem that an electronic device that is normally turned off consumes a lot of wasteful current and has poor current consumption efficiency.
As described above, an electronic device that is activated / terminated by an external remote control means such as an infrared remote controller or that is automatically activated / terminated by a timer has a circuit configuration that consumes current even in a standby state. In addition, a circuit that is not used during standby is energized, and the current is wasted because the conversion efficiency of the power supply device is not good in a small current operation.
In order to suppress such wasteful current consumption, there has been a method of finely controlling the current supply for each circuit block, but there is a drawback that the circuit configuration and control become complicated.

  Therefore, by completely shutting off the power supplied from the commercial AC power supply during the standby operation, the standby power of the device itself is made zero, thereby realizing power saving without requiring a complicated power supply control circuit. It has a problem that must be solved.

  In order to solve the above problems, a standby power cut-off device according to the present invention is configured as follows.

(1) The standby power cut-off device includes a main power supply circuit that generates a power supply voltage for operating various electronic circuits by rectifying a voltage from a commercial AC power supply, and between the commercial AC power supply and the main power supply circuit. It includes a connected relay switch and an ON relay coil and an OFF relay coil that controls opening and closing of the relay switch, and the relay switch is maintained closed by applying a driving current to the ON relay coil, and driven to the OFF relay switch. Breaking operation comprising at least a latching relay that keeps the relay switch open by applying a current, and a standby power supply circuit that is arranged downstream of the main power supply circuit and that can maintain a predetermined voltage. The relay switch is opened and controlled by applying a drive current to the off-relay coil. The voltage supply from the commercial AC power supply is cut off and the relay switch is driven to be closed by applying the battery voltage of the standby power supply circuit to the on-relay coil by the start-up operation. It shall be supplied to the main power supply circuit, and in the end operation, the various setting states of the apparatus are stored in the storage means, and then the power shut-off operation is performed, and is stored in the storage means in the restart operation It is to reproduce various setting states.
(2) The standby power cut-off device according to (1), wherein the battery is configured by a rechargeable battery.
(3) The standby power cut-off device according to (1), further comprising a charging circuit that charges the battery.
(4) The standby power cut-off device according to (1), wherein a booster circuit for boosting a voltage from the battery is provided on the front side of the on-relay coil.
(5) The standby power cut-off device according to (1), further comprising a time measuring means, wherein the power-off operation and the start-up operation are performed by setting a timer in the time measuring means.
(6) An infrared receiving unit is provided, and by receiving a shut-off operation signal from a remote controller, the relay switch is opened and controlled by applying a drive current to the off-relay coil to supply a voltage from the commercial AC power supply The relay switch is closed and controlled by adding the voltage of the battery of the standby power supply circuit to the on-relay coil by receiving the activation operation signal from the remote controller, and the voltage from the commercial AC power supply Is supplied to the main power circuit. The standby power cut-off device according to (1).
(7) It has a means for detecting the battery consumption or a timer operation means for predicting the battery consumption, and when the battery consumption is detected, a start operation is performed to perform a charging operation. The standby power cut-off device according to (1), wherein a cut-off operation is performed to shift to a standby state.

The standby power cut-off device of the present invention is provided with a latching relay between a commercial AC power supply and a main power supply circuit, and controls the latching relay to a closed state by using the power of the battery, which is a battery at the time of start-up. In the state, the latching relay is opened and the input of the commercial AC power supply is completely zero. When energizing, various power supply circuits can be driven by supplying commercial AC power to the main power supply circuit with the voltage of the battery from the open to the closed state of the latching relay. In this manner, when the apparatus is turned off, the supply of power from the commercial AC power supply can be maintained at zero, and unnecessary power consumption can be eliminated.
Furthermore, using the storage means provided in the microcomputer or the storage means formed by a memory (not shown), when the operation is completed, the various setting states in the current operation are stored in this storage means, and then the power is shut off. By performing the operation, various setting states stored in the storage unit can be reproduced at the time of the restart operation, and it is not necessary to perform the same setting every time the power is input.

  Next, an embodiment of a standby power cut-off device according to the present invention will be described with reference to the drawings.

As shown in FIG. 1, the standby power cut-off device of the present invention rectifies a voltage from a commercial AC power supply AC and generates a power supply voltage for operating various electronic circuits (other circuit blocks 15). 11 and a relay switch SW connected between the commercial AC power supply AC and the main power supply circuit 11, and an on-relay coil L2 and an off-relay coil L1 that control the opening and closing of the relay switch SW. The relay switch SW is kept closed by applying current, and the relay switch SW is kept open by applying drive current to the off-relay coil L1, and the standby power supply accepting the voltage from the main power supply circuit 11 A charging circuit 13 for charging a battery which is a battery E of the circuit 14 and a main power circuit 11 are arranged at a stage subsequent to a predetermined circuit, A standby power supply circuit 14 having a battery E capable of maintaining a voltage, a booster circuit 16 that boosts the voltage from the battery E, a power supply SW17 that supplies power from the standby power supply circuit 14 and turns the power on / on, and standby A timer circuit 18 that supplies power from the power circuit 14 and has a timer function; an infrared receiver 19 that has functions to supply power from the standby power circuit 14 and receive infrared signals from a remote controller; Based on the microcomputer 20 that supplies power from the main power supply circuit 11 and receives a switch-off signal from the power supply SW 17 and outputs an off signal, or sets a timer to the timer circuit 18, and the off signal from the microcomputer 20 Switching element Tr1 that causes a current to flow through off-relay coil L1 by being turned on, and an ON signal from the booster circuit It is largely constituted by a switching element Tr2 Metropolitan supplying a current to turn on the relay coil L2 by turning on.
Among these, what can be driven by the battery E of the standby power supply circuit 14 is a power supply SW 17, a timer circuit 18, and an infrared receiver 19. In other words, even if a shut-off operation is performed, these can be driven by the voltage of the battery E of the standby power supply circuit 14.
A forced ON switch SW1 is attached to both ends of the relay switch SW of the latching relay 12. This forced ON switch SW1 is forcibly turned on when the relay switch SW is in an open state and the battery E of the standby power supply circuit 14 is exhausted so that it does not function. AC voltage is supplied. This is a switch that can forcibly supply power when the commercial AC power supply AC is disconnected for a long time and the battery E is exhausted.

  The latching relay 12 is a so-called self-holding relay, and includes a relay switch SW, two off-relay coils L1, and an on-relay coil L2, and holds the relay switch SW in a direction excited by a magnet (not shown). It has a structure to do.

The main power supply circuit 11 is connected to the commercial AC power supply AC and the main rectifier circuit D1 of the main power supply circuit 11 by operating the on-relay coil L2 of the latching relay 12 and closing the relay switch SW. In addition to generating a voltage, a DC power source can be obtained that is supplied to various electronic circuits (another circuit block 15) on the secondary side of the transformer T1. In the main power supply circuit 11, a rectifier circuit composed of diodes D2 and D3 and smoothing capacitors C2 and C3 are connected to the secondary side of the transformer T1, respectively.

The operation of the standby power cut-off device having such a configuration will be described.
First, when the power is turned on, by turning on the power SW 17, an on control signal is generated in the booster circuit 16, and an on signal is generated from the booster circuit 16. This ON signal is input to the gate of the switching element Tr2, and turns on the switching element Tr2. Then, the current from the booster circuit 16 flows through the ON relay coil L2 of the latching relay 12, the relay switch SW is closed, the voltage from the commercial AC power supply AC is input to the main power supply circuit 11, and the main power supply circuit 11 Then, a predetermined logic voltage is generated and supplied to the microcomputer 20 and the charging circuit 13 so that the system can operate. When the logic voltage is supplied to the charging circuit 13, charging of the battery E of the standby power supply circuit 14 starts.

  Next, when the power is turned off, when the power SW 17 is turned off, the off switch-off signal is input to the microcomputer 20, an off signal is generated from the microcomputer 20, and is input to the gate of the switching element Tr1. Turns on. Then, a current flows through the off-relay coil L1 of the latching relay 12, the relay switch SW is opened, the voltage supplied from the commercial AC power supply AC to the main power supply circuit 11 is cut off, and the consumption consumed by the device. The current is completely zero. This means that when viewed from the commercial AC power supply AC side, the current consumed is completely zero, and the clock circuit 18 and the infrared receiver 19 etc. consume the energy of the battery E even during standby in the circuit. Therefore, the commercial AC power source AC is not consumed.

Further, it is possible to perform a shut-off operation and a start-up operation using the timer circuit 18. In this case, a shut-off operation and a start-up operation are performed by setting a timer in the timer circuit 18 based on an instruction from the microcomputer 20 in advance. That is, when a timer is set and started when the time has come, an ON control signal is generated from the time measuring circuit 18 when the timer times out. The ON control signal is input to the booster circuit 16, an ON signal is generated from the booster circuit 16, the switching element Tr <b> 2 is turned ON, and a current is passed through the ON relay coil L <b> 2 of the latching relay 12 to close the relay switch SW. By doing so, the voltage of the commercial AC power supply AC is supplied to the main power supply circuit, and the logic voltage of the DC voltage is generated and supplied to the microcomputer 20 and the charging circuit 13.
On the other hand, when the shut-off operation is performed when the timer times out, it is assumed that power is supplied at the present time and the microcomputer 20 is operating normally. When the timer times out in this state, a time-out time-out signal is input from the time measuring circuit 18 to the microcomputer 20. Then, the microcomputer 20 generates an off signal and turns on the switching element Tr1, so that a current flows through the off relay coil L1, the relay switch SW is opened, and the commercial AC power supply AC to the main power supply circuit 11 is opened. The voltage supply from is cut off.

Furthermore, when the infrared receiver 19 receives a shut-off operation signal or a start-up operation signal by operating a so-called remote controller, the shut-off operation and the start-up operation can be performed.
First, in the case of a shut-off operation, the infrared signal receiving unit 19 receives a shut-off operation signal from the remote controller, whereby a shut-off signal is input to the microcomputer 20. Then, the microcomputer 20 generates an off signal and turns on the switching element Tr1, so that a current flows through the off relay coil L1, the relay switch SW is opened, and the commercial AC power supply AC to the main power supply circuit 11 is opened. The voltage supply from is cut off.
In the case of the activation operation, when the activation operation signal is received by the infrared receiver 19 from the remote controller, an ON control signal is generated from the infrared receiver 19. The ON control signal is input to the booster circuit 16, an ON signal is generated from the booster circuit 16, the switching element Tr <b> 2 is turned ON, and a current is passed through the ON relay coil L <b> 2 of the latching relay 12 to close the relay switch SW. By doing so, the voltage of the commercial AC power supply AC is supplied to the main power supply circuit 11, and the logic voltage of the DC voltage is generated and supplied to the microcomputer 20 and the charging circuit 13.

Further, by using a storage means provided in the microcomputer 20 or a storage means formed by a memory (not shown), when the operation is completed, various setting states in the current operation are stored in the storage means. Turn off the power.
In the restart operation, by reproducing the various setting states stored in the storage unit, it is not necessary to perform the same setting every time the power is input.

Next, a standby power cut-off device according to a second embodiment will be described with reference to FIG.
Among these, the standby power cut-off device of the second embodiment is provided with means for detecting the consumption state of the battery E of the standby power supply circuit 14, and the other configuration is the standby power of the first embodiment described above. Since it is the same as the blocking device, its description is omitted.
The latching relay 12 has a mechanism for forcibly closing the relay switch SW inside. This is because the relay switch SW is forcibly closed using this mechanism when the commercial AC power supply AC is disconnected from the outlet and the battery E of the standby power supply circuit 14 is exhausted and does not function. The voltage of the commercial AC power supply AC can be supplied to the main power supply circuit 11. For example, the power can be turned on by forcibly closing the relay switch SW even when the battery E is exhausted for a long time and the battery E is exhausted.

In addition to the configuration described in the first embodiment, the apparatus detects a consumption level of the battery E in the standby power supply circuit 14 and when the voltage detection unit 21 detects the consumption level of the battery E. The configuration includes a second microcomputer 22 that performs a starting operation and performs a charging operation.
The voltage detector 21 and the second microcomputer 22 are also driven by the battery E of the standby power supply circuit 14.

The voltage detection unit 21 detects the consumption level of the battery E, for example, 2.7 volts at present, and a certain voltage, that is, the power source SW 17 driven by the battery E, the timing circuit 18, and the infrared reception unit 19 are detected. Detects whether the voltage can be driven normally. When the minimum voltage that can be driven is reached, a battery consumption signal is sent to the second microcomputer 22.
When the second microcomputer 22 receives the battery consumption signal from the voltage detector 21, the second microcomputer 22 generates an on control signal. The ON control signal is input to the booster circuit 16, an ON signal is generated from the booster circuit 16, the switching element Tr <b> 2 is turned ON, and a current is passed through the ON relay coil L <b> 2 of the latching relay 12 to close the relay switch SW. By doing so, the voltage of the commercial AC power supply AC is supplied to the main power supply circuit, a DC logic voltage is generated, supplied to the microcomputer 20 and the charging circuit 13, and charging of the battery E is started.
When charging proceeds and reaches a certain charging potential, the voltage detection unit 21 determines that charging is complete and sends a battery charging signal to the second microcomputer 22. When the second microcomputer 22 receives the battery charge signal from the voltage detection unit 21, the second microcomputer 22 determines that charging of the battery E has been completed, and sends a battery off signal to the microcomputer 20. When the microcomputer 20 receives the battery off signal from the second microcomputer 22, the microcomputer 20 enters a shut-off operation. By generating the off signal and turning on the switching element Tr1, a current flows through the off relay coil L1, and the relay switch The SW is in an open state, the supply of voltage from the commercial AC power supply AC to the main power supply circuit 11 is interrupted, and the standby state is entered.

  A latching relay is provided between the commercial AC power supply and the main power supply circuit, and the latching relay is controlled to be closed by using the power of the battery as a battery at the time of start-up. When the AC input is set to zero and the input of the commercial AC power supply is set to zero, and the power is turned on, the latching relay is opened from the open state to the closed state with the battery voltage. A standby power cut-off device capable of driving a power supply circuit is provided.

1 is a block diagram schematically showing a standby power cut-off device according to a first embodiment of the present invention. FIG. It is the block diagram which showed schematically the standby power interruption device of 2nd Example which concerns on this invention. It is the block diagram which showed schematically the standby power supply device in a prior art.

Explanation of symbols

11 Main power supply circuit 12 Latching relay 13 Charging circuit 14 Standby power supply circuit 15 Other circuit block 16 Booster circuit 17 Power supply SW
18 Clocking circuit 19 Infrared receiver 20 Microcomputer 21 Voltage detector 22 Second microcomputer AC Commercial AC power supply E Battery SW Relay switch SW1 Forced ON switch L1 Off relay coil L2 On relay coil Tr1 Switching element Tr2 Switching element.

Claims (7)

A main power supply circuit for generating a power supply voltage for operating various electronic circuits by rectifying a voltage from a commercial AC power supply;
A relay switch connected between the commercial AC power supply and the main power supply circuit; and an on-relay coil and an off-relay coil for controlling opening and closing of the relay switch; and applying the drive current to the on-relay coil, the relay A latching relay that maintains the switch closed and maintains the relay switch open by applying a drive current to the off-relay switch;
A standby power supply circuit provided with a battery that is disposed downstream of the main power supply circuit and can maintain a predetermined voltage; and
The relay switch is opened and controlled by applying a drive current to the off-relay coil by a cut-off operation to cut off the voltage supply from the commercial AC power supply,
The relay switch is closed and controlled by applying the battery voltage of the standby power supply circuit to the on-relay coil by a starting operation, and the voltage from the commercial AC power supply is supplied to the main power supply circuit .
In the end operation, the various setting states of the apparatus are stored in the storage means, and then the power shut-off operation is performed, and in the restart operation, the various setting states stored in the storage means are reproduced. Standby power cut-off device.   The standby power cut-off device according to claim 1, wherein the battery is a rechargeable battery. The standby power cut-off device according to claim 1, further comprising a charging circuit that charges the battery.   The standby power cut-off device according to claim 1, wherein a booster circuit that boosts a voltage from the battery is provided in front of the on-relay coil.   2. The standby power cut-off device according to claim 1, further comprising a time measuring unit, wherein the power-off operation and the start-up operation are performed according to a timer setting of the time measuring unit.   An infrared receiving unit is provided, and by receiving a cut-off operation signal from a remote controller, by applying a drive current to the off-relay coil, the relay switch is opened and controlled to cut off the voltage supply from the commercial AC power supply. Receiving the activation operation signal from the remote control, applying the voltage of the battery of the standby power supply circuit to the on-relay coil, and controlling the relay switch to be closed to control the voltage from the commercial AC power supply. The standby power cut-off device according to claim 1, wherein the standby power cut-off device is supplied to a power supply circuit.   A means for detecting the battery consumption or a timer operation means for predicting the battery consumption; when the battery consumption is detected, a start operation is performed to perform a charging operation; The standby power cut-off device according to claim 1, wherein the standby power cut-off device is changed to a standby state.

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