JPH0592938U - Time switch opening / closing control device - Google Patents

Abstract

(57) [Abstract] [Purpose] To provide an opening / closing control device for a time switch that controls opening / closing of a switch without constantly rotating a motor and controls the switch to open / close at an accurate time. A pulse generator 10 for generating a pulse signal of a predetermined frequency, a setting unit 30 for setting the opening / closing time of a switch 60, and a pulse signal from the pulse generator 10 for updating the current time to set the current time. The opening / closing time set in 30 is compared with the current time to determine whether the current time corresponds to the open or closed state of the switch 60, and the switch 60 is opened or closed. The motor is driven when the open / closed state determined by the timer unit 20 and the open / closed state monitored by the monitor 70 do not match, and the motor 50 is driven when they match. And a control unit 40 for stopping the operation.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an opening / closing control device for a time switch, which controls opening / closing of a switch included in the time switch.

[0002]

[Prior Art]

 The time switch turns the contacts of the switch on and off at a preset time to close or open the switch. If, for example, a commercial power supply and a device receiving this power supply are connected to this switch, the power supply to this device can be controlled.

Some of such time switches control ON / OFF of contacts of a switch by rotating a cam. The cam is rotated by the synchronous motor, and the synchronous motor rotates at the power supply frequency. Further, the rotation of the motor is reduced by the reduction gear, and the rotation is adjusted so that the cam makes one rotation in 24 hours.

[0004]

[Problems to be solved by the device]

 By the way, if the ON / OFF of the contact of the switch is controlled by the rotation of the cam, the following drawbacks occur.

(1) Since the motor is constantly rotating, it is easily worn and consumes a large amount of electric power.

(2) Since the switch opens and closes at a set time by rotation of the motor, a motor with high rotation accuracy per unit time is required.

(3) When the power is cut off due to a power failure or the like, the motor does not rotate, and therefore, it may be necessary to take measures during the power failure.

(4) Even if the cam is rotated using a power spring or the like as a measure against a power failure, the switch will not open / close at an accurate time if the rotation accuracy due to the power spring or the like is poor.

(5) When a power failure countermeasure is taken by using a mainspring or the like, the structure becomes complicated and it is likely to cause a failure.

The object of the present invention is, except for such drawbacks, an opening / closing control device for a time switch, which controls opening / closing of a switch without constantly rotating a motor and controls the switch to open / close at an accurate time. To provide.

[0011]

[Means for Solving the Problems]

 In order to achieve the object, the present invention uses a pulse generator that generates a pulse signal of a predetermined frequency, a setting unit that sets the opening / closing time of a switch, and a pulse signal from the pulse generator to determine the current time. Is updated and the open / close time set in the setting section is compared with the current time to determine whether the current time corresponds to the open or closed state of the switch and the switch. When the monitoring unit that monitors whether it is open or closed and the open / closed state determined by the timer unit and the open / closed state monitored by the monitoring unit do not match, the motor is driven.When they match, the motor is driven. And a control unit to stop.

[0012]

[Action]

 With such a configuration, the opening / closing time of the switch is set in the setting section, and the pulse generating section generates a pulse signal having a predetermined frequency. The monitoring unit monitors whether the switch is open or closed.

The timer unit updates the current time with the pulse signal from the pulse generator. Further, the timer unit compares the opening / closing time set in the setting unit with the current time to determine whether the current time corresponds to the open or closed state of the switch. The control unit drives the motor when the open / closed state determined by the timer unit and the open / closed state monitored by the monitoring unit do not match, and when the open / closed state does not match, stops driving the motor.

[0014]

【Example】

 Next, an embodiment of this invention will be described with reference to the drawings.

FIG. 1 is a block diagram showing a first embodiment of a time switch opening / closing control device according to the present invention. This time switch opening / closing control device includes a pulse generation circuit 10 as a pulse generation unit, a timer circuit 20 as a timer unit, a setting circuit 30 as a setting unit, a control circuit 40 as a control unit, and a motor 50. A switch 60, a monitoring circuit 70 as a monitoring unit, and a power supply circuit 80.

The pulse generation circuit 10 divides the commercial frequency of the commercial power supply 10 a to generate a pulse signal of 1 Hz, and sends this pulse signal to the timer circuit 20.

In the setting circuit 30, the opening time or closing time of the switch 60 is set. The setting circuit 30 can set one or more times.

The timer circuit 20 counts the 1 Hz pulse signal from the pulse generation circuit 10 and updates the time. As a result, the current time is marked. Further, the timer circuit 20 compares the current time with the set time of the setting circuit 30, and determines whether the current time exceeds the set time. Based on this determination, the opening / closing information indicating whether the current time is the time zone when the switch 60 is in the open state or the time zone when the switch 60 is in the closed state is generated.

The monitoring circuit 70 monitors the open / closed state of the switch 60, and generates monitoring information indicating whether the switch 60 is currently in the open state or the closed state.

The control circuit 40 generates a drive signal for driving the motor 50 based on the information of the timer circuit 20 and the monitoring circuit 70. That is, the drive signal shown in Table 1 is generated by the opening / closing information indicating the time period of the open or closed state and the monitoring information indicating the open or closed state, and sent to the motor 50.

[0021]

[Table 1]

As shown in Table 1, the drive signal is generated only when the open / close states of the switch 60 indicated by the open / close information and the monitor information do not match.

The motor 50 starts rotating upon receiving the drive signal from the switch 60, and reduces the number of rotations by a gear or the like to rotate the shaft 51. A brushless motor is used as the motor 50 in consideration of reliability and the like.

The contact of the switch 60 is turned on and off by the rotation of the shaft 51 of the motor 50, and is opened or closed.

The power supply circuit 80 converts the AC voltage of the commercial power supply into a DC voltage, and supplies this DC voltage to the pulse generation circuit 10, the timer circuit 20, the setting circuit 30, the control circuit 40, and the monitoring circuit 70. Each circuit operates by this DC voltage.

Next, the operation of the first embodiment will be described.

Here, the switch 60 is closed at the first time, and the switch 60 is controlled to be opened at the second time after a predetermined time has elapsed. When performing such control, the first and second times are set in the setting circuit 30.

On the other hand, the pulse generation circuit 10 sends a 1 Hz pulse signal generated from the commercial frequency to the timer circuit 20. The timer circuit 20 updates the time with this pulse signal. Further, the monitoring circuit 70 detects the open / closed state of the switch 60, and sends monitoring information indicating that the switch 60 is currently in the open state to the control circuit 40.

In such a state, when the first time set in the setting circuit 30 is reached, the timer circuit 20 sends the opening / closing information indicating the time zone of the closed state to the control circuit 40. Since this open / close information does not match the monitor information indicating the open state from the monitor circuit 70, the control circuit 40 generates a drive signal as shown in Table 1 and sends it to the motor 50. The motor 50 rotates the shaft 51 by this drive signal to turn on the contact of the switch 60. As a result, the switch 60 is closed.

At this time, the monitoring circuit 70 sends monitoring information indicating the closed state of the switch 60 to the control circuit 40. Since this monitoring information matches the opening / closing information from the timer circuit 20, the control circuit 40 stops the generation of the drive signal as shown in Table 1. As a result, the motor 50 stops rotating, so that the switch 60 remains closed.

At a second time after a predetermined time has passed from the first time, the timer circuit 20 sends the opening / closing information indicating the open time period to the control circuit 40. Since this opening / closing information does not match the monitoring information from the monitoring circuit 70, the control circuit 40 generates a drive signal as shown in Table 1 and sends it to the motor 50.

The motor 50 is rotated by this drive signal to turn off the contact of the switch 60. As a result, the switch 60 is opened. At this time, the monitoring circuit 70 sends monitoring information indicating the open state to the control circuit 40. Since this monitoring information matches the opening / closing information from the timer circuit 20, the control circuit 40 stops the generation of the drive signal as shown in Table 1. As a result, the motor 50 stops rotating, so that the switch 60 remains open.

In this way, the control for closing the switch 60 is performed from the first time to the second time. Such Embodiment 1 has the following advantages.

(1) Since the motor rotates only when the contacts of the switch are turned on and off, power consumption by the motor is reduced, wear of the motor is reduced, and durability of the motor is improved.

(2) Since the motor is for turning on and off the contacts of the switch, it is not necessary to have a motor with high rotation accuracy.

(3) Since the timer circuit updates the time by the pulse signal generated from the commercial frequency, the time can be accurately set, and the switch is opened / closed at the correct time.

FIG. 2 is a block diagram showing a second embodiment of a time switch opening / closing control device according to the present invention. This time switch opening / closing control device includes a pulse generation circuit 11, a timer circuit 20, a setting circuit 30, a control circuit 40, a motor 50, a switch 60, a monitoring circuit 70, and a power supply unit 90. I have it.

The pulse generation circuit 11 is oscillated by the crystal oscillator 11a. Then, the frequency of the signal obtained by this oscillation is divided to generate a pulse signal of 1 Hz, and this pulse signal is sent to the timer circuit 20.

The power supply unit 90 includes a power supply circuit 91 that converts an AC voltage of a commercial power supply into a DC voltage, a battery circuit 92 that generates the same DC voltage as the power supply circuit 91 by a battery, and normally a DC power from the power supply circuit 91. A switching circuit 93 is provided for applying a voltage to each circuit and for supplying a DC voltage from the battery circuit 92 to each circuit when the commercial power supply fails.

The timer circuit 20, the setting circuit 30, the control circuit 40, the motor 50, the switch 60, and the monitoring circuit 70 are the same as those in the first embodiment, and the description thereof will be omitted.

According to the second embodiment described above, normally, the DC voltage from the power supply circuit 91 is applied to each circuit, and each circuit operates. As a result, the opening / closing of the switch 60 is controlled as in the first embodiment.

When a power failure occurs, the switching circuit 93 performs a switching operation, and the DC voltage from the battery circuit 92 is applied to each circuit. The pulse generation circuit 11 continues to oscillate by the crystal oscillator 11 a and generates a pulse signal. This allows each circuit to continue operating even during a power outage.

The second embodiment has the following advantages in addition to the advantages (1), (2) and (3) of the first embodiment. That is, even if the commercial power supply fails, the pulse generator circuit 11 including the crystal oscillator 11a and the battery circuit 92 can continue to operate the respective circuits. As a result, the effect of power failure can be eliminated.

FIG. 3 is a block diagram showing a third embodiment of a time switch opening / closing control device according to the present invention. This time switch opening / closing control device includes a pulse generator 12, a timer circuit 20, a setting circuit 30, a control circuit 40, a motor 50, a switch 60, a monitoring circuit 70, and a power supply unit 90. I have it.

The pulse generator 12 divides the commercial frequency of the commercial power supply 13a to generate a pulse signal of 1 Hz, and a frequency of a signal obtained by oscillation of the crystal oscillator 14a. And a switching circuit for sending the pulse signal from the pulse generating circuit 13 to the timer circuit 20 and for sending the pulse signal from the pulse generating circuit 14 in case of power failure. 15 and.

The timer circuit 20, the setting circuit 30, the control circuit 40, the motor 50, the switch 60, the monitoring circuit 70, and the power supply unit 90 are the same as those in the second embodiment, and the description thereof will be omitted.

According to the third embodiment as described above, the DC voltage from the power supply circuit 91 is normally applied to each circuit. Further, a pulse signal having a commercial frequency is sent to the timer circuit 20. As a result, the opening / closing of the switch 60 is controlled as in the first embodiment.

When a power failure occurs, the switching circuit 93 performs a switching operation, and the DC voltage from the battery circuit 92 is applied to each circuit. Further, the switching circuit 15 performs the switching operation, and the pulse signal from the pulse generating circuit 14 is sent to the timer circuit 20. This allows each circuit to continue operating even after a power failure. Note that the pulse signal by the crystal oscillator is less accurate than that by the commercial frequency, but since this pulse signal is used only during a power failure, a large error does not occur in the time ticked by the timer circuit 20.

The third embodiment has the following advantages in addition to the advantages (1), (2) and (3) of the first embodiment. That is, since the time is usually engraved with the pulse signal obtained from the commercial frequency and the time is engraved with the pulse signal obtained from the crystal unit only at the time of power failure, the time engraved in the timer circuit 20 is the same as that in the second embodiment. It will be more accurate than that.

[0050]

[Effect of the device]

 As explained above, this invention has the following effects.

(1) Since the motor rotates only when the switch is opened / closed, the power consumption is reduced, the motor is less worn, and the durability is improved.

(2) Since the motor is used only for opening and closing the switch, it is not necessary to have a motor with high rotation accuracy.

(3) Since the time is recorded by counting the pulse signals, the time error is reduced and the opening / closing time of the switch is accurate.

(4) Since the monitoring unit monitors the open / closed state of the switch, the switch can be reliably opened / closed, and the reliability is improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment of a time switch opening / closing control device according to the present invention.

FIG. 2 is a block diagram showing a second embodiment of a time switch opening / closing control device according to the present invention.

FIG. 3 is a block diagram showing a third embodiment of a time switch opening / closing control device according to the present invention.

[Explanation of symbols]

 10 pulse generation circuit (pulse generation part) 20 timer circuit (timer part) 30 setting circuit (setting part) 40 control circuit (control part) 50 motor 60 switchgear 70 monitoring circuit (monitoring part)

Claims (4)

[Scope of utility model registration request] 1. An opening / closing control device for a time switch in which a switch is turned on / off by rotation of a motor, comprising: a pulse generator for generating a pulse signal of a predetermined frequency; and a setting unit for setting the opening / closing time of the switch. The current time is updated by the pulse signal from the pulse generator, and the open / close time set in the setting unit is compared with the current time, and the current time indicates whether the switch is open or closed. And a monitoring unit that monitors whether the switch is in an open or closed state, an open / closed state determined by the timer unit, and an open / closed state monitored by the monitoring unit. And a control unit that drives the motor when the values do not match, and stops the driving of the motor when the values match. 2. The opening / closing control device for a time switch according to claim 1, wherein the pulse generating section divides a commercial frequency to generate a pulse signal having a predetermined frequency. 3. The opening / closing control device for a time switch according to claim 1, wherein the pulse generation unit divides the frequency of the signal generated by oscillation to generate a pulse signal of a predetermined frequency. 4. The first pulse generation circuit, wherein the pulse generation section divides a commercial frequency to generate a pulse signal of a predetermined frequency, and a pulse of a predetermined frequency divided by a frequency of a signal generated by oscillation. A second pulse generating circuit that generates a signal, and normally sends a pulse signal from the first pulse generating circuit to the timer unit, and outputs a pulse from the second pulse generating circuit when the commercial frequency is cut off. The switching control device for a time switch according to claim 1, further comprising a switching circuit that sends a signal to the timer unit.