JP2002368903A - Standby power reduction device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a small-sized and inexpensive standby power reduction device with a simplified configuration without the need for using large-sized and expensive electronic components. SOLUTION: The standby power reduction device is provided with AC power output terminals 2 connected to a power supply device, a telephone line output terminal 4 connected to an electronic device, telephone line input terminals 3 receiving an external call signal, a telephone line output terminal 4 supplying a call signal to the electronic device, a 16 Hz detection section 10 that detects the call signal received by the telephone line input terminals 3, a timer section 11 that measures time when the detection section 10 detects the call signal, and a signal synthesis section 13, a 2nd switch section 14 and a 1st switch section 5 that start supply of power to the electronic device in response to the detection section 10 detecting the call signal and terminate the supply of power to the electronic device after a lapse of a prescribed time set to a setting section 16 in advance by the timer section 11.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a standby power reduction device.

[0002]

2. Description of the Related Art With the spread of the Internet and the like using home faxes and personal computers in recent years, various communication devices such as terminal adapters for home faxes and personal computers or telephones have been connected to telephone lines in houses. There are many. As a power supply for such a communication device, a home AC power supply (AC100V)
And the like, and are often connected to a power supply terminal at all times in preparation for an incoming call signal from the outside.

[0003]

However, an AC power supply used for the above-mentioned communication equipment is often kept energized.
A time of 0% or more is a standby time. Therefore, in communication devices, it is demanded to reduce power consumption during the standby time from the viewpoint of energy saving and power rate.

On the other hand, in the prior art, Japanese Unexamined Patent Publication No.
A power saving device as disclosed in Japanese Patent Application Laid-Open No. 780 has been proposed.

This power saving device is constructed by connecting an AC power supply in series with a power on / off circuit 101, and when a call signal from a telephone line is detected by a call signal detection circuit 102, power is supplied to communication equipment such as a facsimile. I do. In addition, the saving device includes a timer circuit 103 that turns off the power supply of the communication device within a predetermined time after detecting the end of the transmission / reception processing by the transmission / reception signal detection circuit of the communication device. As a result, power consumption during the standby time of the communication device is saved.

However, this power saving device has the following problems. That is, in this saving device, a power on / off circuit 101 for switching an AC power supply between on and off is provided by a triac 111 or a photocoupler 11.
It is composed of expensive electronic components such as 2,113. Also,
In this power saving device, a circuit for an internal power supply is connected to a step-down transformer 11.
4 and large and expensive electronic components such as the electrolytic capacitor 115. Further, this power saving device uses a large and expensive impedance matching transformer 116 for connection to a telephone line, and the signal detection circuit 104 includes a comparator or operational amplifier 115, and a large and expensive impedance matching volume or inverter IC. It is configured using electronic components. Therefore, this saving device is large and expensive due to the electronic components used.

Therefore, the present invention has been proposed in view of the above-mentioned circumstances, and provides a small and inexpensive standby power reducing device with a simplified configuration without using large and expensive electronic components. The purpose is to:

[0008]

The invention according to claim 1 is
In order to solve the above-mentioned problem, in a standby power reduction device connected to a power supply device and connected to an electronic device to supply power from the power supply device to the electronic device, a power supply connected to the power supply device Power supply means having an input terminal and a power supply terminal connected to the electronic device;
A signal input terminal for inputting a call signal from outside, a signal output terminal for supplying a call signal to the electronic device, and a call signal detecting means for detecting a call signal input to the signal input terminal; A timer for counting the time from the time when the call signal is detected by the call detection means; and starting power supply to the electronic device by the power supply means in response to the detection of the call signal by the call signal detection means. Power supply control means for terminating power supply to the electronic device by the power supply means after a predetermined time set by the clock means has elapsed.

The invention according to a second aspect is the invention according to the first aspect, further comprising an operation input unit having an operation unit operated by a user, wherein the power supply control unit is configured such that the operation input unit operates the operation input unit. The power supply to the electronic device by the power supply means is opened and closed in response to the operation.

[0010] The invention according to claim 3 is the invention according to claim 1, further comprising communication means for receiving a command from a user, wherein the power supply control means responds to the command from the communication means. The power supply to the electronic device by the power supply means is opened and closed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings.

The present invention is applied to, for example, a standby power reduction device configured as shown in the block diagram of FIG. This standby power reduction device is realized by a circuit configuration as shown in FIG. This standby power reduction device is installed between, for example, a telephone line and a home fax machine, a business fax machine, a terminal adapter, a telephone communication device, or the like, or is built in each of the communication devices to transmit a call signal of the telephone line. Detects and supplies AC power (100V AC).

[Functional Configuration of Standby Power Reduction Apparatus] FIG.
The standby power reducing device shown in FIG. 1 has an AC power input terminal 1 connected to an external power supply (not shown), an AC power output terminal 2 connected to an external communication device (not shown), and a telephone line connected to a telephone line. An input terminal 3 and a telephone line output terminal 4 connected to a communication device are provided.

This standby power reduction device is provided between an external power supply device and a communication device, supplies power from the power supply device to the communication device, and supplies a communication signal from a telephone line to the communication device. Is what you do.

The standby power reducing device also includes a first switch unit 5 provided on one or both AC power supply lines 21 of the AC power input terminal 1 and a first switch unit 5 connected to both the AC power supply lines 21. The rectification unit 6 includes a power supply unit 7 connected to the first rectification unit 6, a step-down unit 8 connected to both of the AC power supply lines 21, and a second rectification unit 9 connected to the step-down unit 8.

The first rectifying unit 6 receives an AC power (for example, 100 V) from a power supply that is constantly supplied, and supplies the AC power as a DC power to the power supply unit 7 by performing rectification. The power supply unit 7 converts the DC power from the first rectifier 6 into a required internal power supply and supplies the required power to each unit constituting the standby power reduction device.

The step-down unit 8 is connected to the AC power supply line 21, and supplies the second rectifier 9 with an AC power from the power supply unit as an AC voltage which is reduced to a required voltage. Second rectifier 9
Is supplied from the step-down unit 8 to the timer unit 11 by rectifying the AC voltage into a DC voltage.

Further, the standby power reducing device includes a 16 Hz detecting unit 10 connected to the telephone line connecting line 22 and a 16 Hz detecting unit 10.
Timer section 11 connected to detection section 10, operation switch section 12 operated by the user, signal synthesis section 13 connected to operation switch section 12 and timer section 11, connection to 16 Hz detection section 10 and first switch section 5 A reset unit 15 connected to the second switch unit 14, the second switch unit 14 and the timer unit 11, and a setting unit 16 connected to the timer unit 11.

Further, the standby power reducing device is activated by the 16 Hz detecting unit 10 connected to the telephone line connection line 22 and the 16 Hz detecting unit 10 to activate the second rectifying unit 9 or the oscillating unit 17.
A timer unit 11 for counting signals from the user, an operation switch unit 12 operated by a user, and an operation switch unit 12
A signal synthesizing unit 13 for synthesizing an operation input signal from the controller 11 and a signal from the timer unit 11, a second switch unit 14 for driving the first switch unit 5 according to a signal from the signal synthesizing unit 13, A reset unit 15 for resetting the timer unit 11 by a voltage from the power supply unit 7 or a signal from the second switch unit 14, a setting unit 16 for setting the time of the timer unit 11, and a signal for counting by the timer unit 11 And an oscillating unit 17 for supplying.

This standby power reduction device has a frequency of 16 Hz and an amplitude of 200 V between two lines on the telephone line connection line 22.
A call signal (ringer signal) for calling a communication device (1 sec on, 2 sec off) is input.

The 16 Hz detection unit 10 is connected to the telephone line connection line 2.
By detecting that a call signal has been input to the second unit 2 and supplying a drive signal to the timer unit 11 and the second switch unit 14, the count of the timer unit 11 is driven and the second switch unit 14 is driven.

The second switch section 14 is a 16 Hz detection section 1
0, and drives the first switch unit 5 to turn on the first switch unit 5 in accordance with the drive signal from the 16 Hz detection unit 10 to turn on the AC power supply line 21.
As a result, the second switch unit 14 supplies power between the power supply device connected to the AC power input terminal 1 and the communication device connected to the AC power output terminal 2 to supply power to the communication device. To control the first switch unit 5.

The timer section 11 is driven in response to the drive signal from the 16 Hz detection section 10 and starts counting from the time when the call signal is detected on the telephone line connection line 22, thereby providing the time from the call signal detection time. Time. The timer unit 11 has a counting cycle given by an AC voltage from the second rectifying unit 9 or an oscillation signal generated by the oscillating unit 17. Further, the timer unit 11 holds the settings set in advance by the setting unit 16. When the counter value updated by the count signal reaches the set value set in advance by the setting unit 16, the timer unit 11 outputs a drive signal for driving the signal combining unit 13.

The signal synthesizing section 13 is composed of, for example, a wired OR connection of NPN transistors.
And the operation input signal from the operation switch unit 12 are input, and the second switch unit 14 is turned on or off according to the result of synthesizing the input signals.
That is, the signal combining unit 13 controls the second switch unit 14 to be in an on state or an off state by receiving any one of the signals. Thereby, the signal synthesis unit 13 turns off the first switch unit 5 by turning off the second switch unit 14 and turns off the first switch unit 5 by turning on the second switch unit 14. The connection state between the power supply device and the communication device is turned on or off.

The operation switch section 12 is constituted by an operation switch or the like operated by a user. The signal synthesis section 13 is operated by operating the operation switch or the like regardless of the presence or absence of a call signal supplied to the telephone line connection line 22. To output the operation input signal. As a result, the operation switch unit 12
The switch unit 14 and the first switch unit 5 are turned on or off, and the connection state between the power supply device and the communication device is turned on or off.

When a radio receiving unit is provided instead of the operation switch unit 12, the same operation as the operation switch unit 12 is performed by an external radio signal.

The reset unit 15 has a function of performing an initial reset for resetting the counter value of the timer unit 11 by inputting that the first switch unit 5 has been turned on when the call signal is received by the 16 Hz detection unit 10. Have. Further, when the timer section 11 counts up to the set value, the reset section 15 causes the second switch section 14 to perform the first switch.
When the switch unit 5 is turned off, a drive signal is input from the second switch unit 14. The reset unit 15 resets the counter value of the timer unit 11 in response to the input of the drive signal.

When the standby power reducing apparatus configured as described above receives a call signal on the telephone line connection line 22,
The call signal is detected by the 16 Hz detection unit 10 and the timer unit 11 is driven. Then, the standby power reduction device starts counting by the timer unit 11 and energizes the AC power supply for a certain time until the counter value reaches the set value. In addition, when the standby power reducing device does not receive the call signal, the standby power can be reduced by turning off the first switch unit 5 and turning off the AC power supply.

In this standby power reducing device, the step-down unit 8 and the second rectifying unit 9 may be omitted, and only the oscillating unit 17 may be used.

In this standby power reduction device, the AC power input terminal 1 and the AC power output terminal 2, the first rectifier 6, the power source 7, the step-down unit 8, and the second rectifier 9 are omitted, and the timer 11 The signal to the reset unit 15 may be provided by an AC adapter, and the first switch unit 5 may be provided to an external AC power supply.

Further, the standby power reducing apparatus may include, instead of the operation switch section 12, a wireless receiving means wirelessly connected to an operation mechanism operated by a user and inputting an operation input signal. Both the switch unit 12 and the wireless communication unit may be provided.

Further, in this standby power reducing device, the arrangement positions of the step-down unit 8 and the second rectifying unit 9 may be exchanged, and furthermore, the constituent units may be provided outside. .

Further, in this standby power reduction device, display means such as an LED may be provided in order to present to the user that the AC power is supplied to the AC power supply line 21.

[Specific Configuration of Standby Power Reduction Apparatus] FIG.
FIG. 2 shows a specific configuration example of a standby power reduction device having the same function as the standby power reduction device shown in FIG. Note that circuit portions having the same functions as those of the above-described standby power reduction device are denoted by the same reference numerals. In the example shown in FIG.
Although the case where an integrated circuit is used as the timer unit 11 is illustrated, the circuit function is provided by a micro CPU (Central Process
ng Unit).

In this standby power reduction device, 16 Hz
Upon receiving the calling signal through the coupling of the capacitor C1, the detecting unit 10 performs step-down and rectification by the resistor R1 and the diode D1, smoothes by the resistor R2 and the capacitor C2,
The N transistor T1 is turned on, and the next-stage PNP transistor T2 is turned on.

Then, the NPN transistor T3 of the second switch section 14 is turned on, the first switch section 5 of the electromagnetic relay is turned on, and AC power is supplied to the AC power output terminal 2.

The second rectifier 9 is composed of a bridge diode connected to the AC power supply line 21. The voltage is stepped down by the resistor R3 corresponding to the step-down unit 8, then rectified by the diode D2, and supplied to the timer unit 11. Input signal.

The timer section 11 is an integrated circuit IC1 shown in FIG.
By connecting the Q12 terminal or the integrated circuit IC2Q3 terminal to another appropriate output terminal of IC1 and IC2, different setting values are set. The timer unit 11 counts the input signal from the diode D2, and when it reaches a preset value, turns on the NPN transistor T4 of the second switch unit 14 to ground, and turns off the NPN transistor T3. Then, the AC power of the AC power output terminal 2 is cut off to cut off the power supply of the communication device.

When the 16 Hz detecting section 10 detects the calling signal, the reset section 15 outputs the PNP transistor T2.
When the NPN transistor T5 of the second switch unit 14 is turned on by the timer unit 11, that is, the NPN transistor T5 is turned off after a certain period of time has elapsed from the reception time of the call signal. It consists of. Accordingly, the reset unit 15 generates a reset signal when the internal power supply is turned on to reset the counter value of the timer unit 11 and, when a predetermined time has elapsed from the reception of the call signal, the timer unit. The counter value of 11 is reset.

The operation switch section 12 includes an operation switch section 12A and an operation switch section 12B which operate in conjunction with each other. The operation switch unit 12 includes an operation switch unit 12A.
Is turned on (grounded), the first switch unit 5 is turned on, the AC power is output to the AC power output terminal 2, the operation switch unit 12B is turned off, the power supply is stopped, and the signal synthesizing unit 13 is turned off. Diode D3,
The input of the timer unit 11 is stopped via D4.

The first rectifier 6 is composed of a bridge diode connected to the AC power supply line 21 and rectifies the AC power. Further, the power supply unit 7 includes a resistor R4, a Zener diode ZD1, and a capacitor C3.

When the standby power reducing apparatus configured as described above receives the call signal as in the case shown in FIG. 1, it detects the call signal, drives the timer section 11, and counts the timer section 11. , And the AC power supply is energized for a certain period of time until the counter value reaches the set value. In addition, the standby power reduction device can reduce the standby power by cutting off the AC power when the call signal is not received. Further, in this standby power reduction device, the AC power is supplied for a certain period of time by the timer unit 11 and the power is supplied by operating the operation switch unit 12.

In this standby power reduction device, as shown in FIG. 2, the timer unit 11 supplies power for a certain period of time, and the operation switch unit 12 controls the supply of power. The standby power can be reduced by using a small and inexpensive electronic component with a simplified configuration without using it. Specifically, this standby power reduction device can be realized with a small, simple, and inexpensive configuration without using large and expensive electronic components such as a triac, a phototransistor, a step-down transformer, and an impedance matching transformer. it can.

In the configuration example shown in FIG. 2, the components are constituted by so-called discrete components. However, in order to reduce the size and the cost, the necessary parts are constituted as a microcomputer, and the above-mentioned operations are executed on the recording medium. A program for causing the microcomputer to execute the program is stored. In this case, the setting unit 16 may be configured by a digital switch, a small potentiometer, or a rotary switch, or may adopt a setting method using digital data of external communication.

The above embodiment is an example of the present invention. For this reason, the present invention is not limited to the above-described embodiment, and other than the present embodiment, various modifications may be made according to the design and the like within a range not departing from the technical idea according to the present invention. Can be changed.

[0046]

According to the first aspect of the present invention, the power supply to the electronic device is started by the power supply means in response to the detection of the call signal by the call signal detection means, and the predetermined time is set by the clock means. The operation of terminating the power supply to the electronic device by the power supply means after a predetermined time has elapsed, so large and expensive electronic components are used for a circuit for turning on and off the power supply and a circuit portion for detecting a call signal. Without doing so, a compact and inexpensive configuration can be achieved with a simplified configuration.

According to the second aspect of the present invention, in addition to the effect of the first aspect of the present invention, the power supply control means controls the electronic equipment by the power supply means in response to the operation of the operation input means. Since the power supply is opened and closed, standby power can be reduced with a simple configuration.

According to the invention of claim 3, in addition to the effect of the invention of claim 1, the power supply control means controls the power supply to the electronic device by the power supply means in response to a command from the communication means. Since it opens and closes, standby power can be reduced with a simple configuration.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a functional configuration of a standby power reduction device to which the present invention has been applied.

FIG. 2 is a circuit diagram showing a specific configuration of a standby power reduction device to which the present invention is applied.

FIG. 3 is a circuit diagram showing a configuration of a conventional power saving device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 AC power input terminal 2 AC power output terminal 3 Telephone line input terminal 4 Telephone line output terminal 5 First switch unit 6 First rectifier unit 7 Power supply unit 8 Step-down unit 9 Second rectifier unit 10 16 Hz detection unit 11 Timer unit 12 Operation Switch section 13 Signal synthesis section 14 Second switch section 15 Reset section 16 Setting section 17 Oscillator

Claims (3)

[Claims] 1. A standby power reduction device connected to a power supply device and connected to an electronic device to supply power from the power supply device to the electronic device, comprising: a power input terminal connected to the power supply device; Power supply means having a power supply terminal connected to the electronic device, a signal input terminal for inputting a call signal from the outside, and a signal output terminal for supplying a call signal to the electronic device, wherein the signal A calling signal detecting means for detecting a calling signal input to the input terminal; a time measuring means for measuring a time from a time when the calling signal is detected by the calling detecting means; and a calling signal detected by the calling signal detecting means. Power supply to the electronic device by the power supply means is started in response to a predetermined time set in advance by the timer means Standby power reduction apparatus characterized in that it comprises a power supply control means for terminating the power supply to the electronic device by said power supply means. 2. The electronic apparatus according to claim 1, further comprising an operation input unit having an operation unit operated by a user, wherein the power supply control unit controls the power supply unit to operate the electronic device in response to the operation of the operation input unit. The standby power reducing device according to claim 1, wherein the power supply is opened and closed. 3. A communication device for receiving a command from a user, wherein the power supply control device opens and closes a power supply to the electronic device by the power supply device in response to a command from the communication device. The standby power reduction device according to claim 1, wherein: