JPH05159673A - Electronic time switch - Google Patents

Abstract

PURPOSE:To provide an electronic time switch easy to assemble and capable of reducing the outer shape and precisely detecting ON/OFF of a switch. CONSTITUTION:Into a fixed block 9 to which two sets of fixed side leaf springs 10A1 and movable side leaf springs 10A2 are fixed, a fixed side leaf spring 10B1 for detecting switch operation of the same product as the fixed side leaf spring 10A1 and a movable side leaf spring 10B2 for detecting switch operation of the same product as the movable side leaf spring 10A2 are integrated.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic time switch for turning a load on and off in combination with a watt hour meter.

[0002]

2. Description of the Related Art A consumer who uses late-night power is equipped with a watt-hour meter for measuring late-night power in addition to a normal watt-hour meter. At a predetermined time, the watt-hour meter for late-night power metering is installed. An electronic time switch is connected to connect the load to. This electronic time switch consists of a switch that turns the load on and off, an operation unit that turns the switch on and off, a detector that detects the on / off state of the switch, and a switch on / off from this detector. -It is composed of a control unit that operates the operation unit when a turn-off signal is input.

FIG. 7 is a diagram showing a switch, an operating section and a detecting section of a conventional electronic time switch. In FIG. 7, the switch 20 is laterally attached to the mounting base (not shown) with an insulating fixing block 29 with respect to the mounting base. Of these, the terminal portions of a pair of fixed side leaf springs 10A1 formed of a beryllium copper plate in the shape of a strip plate are pierced and fixed to the insulating fixed block 29. These fixed side leaf springs 10A1
One side of the movable side leaf spring 10A2, which is also formed of a beryllium copper plate in a strip shape and is slightly longer than the fixed side leaf spring 10A1.
Is provided adjacent to the fixed side leaf spring 10A1, and the terminal portion is fixed by penetrating the insulating fixing block 29. Fixed side leaf spring 10A1
At the tip of the contact point 6 on the surface facing the movable side leaf spring 10A2.
6A is joined to the tip of the movable leaf spring 10A2.
In FIG. 7 in which the contact 6A is joined in opposition to the contact and the switch 20 is in the “on” state, these contacts 6A are in contact.

On one side of the tip of the switch 20, a part of the movable iron core 11 inside the operating portion 3 which operates by a solenoid is opened and closed.
And is fixed to a mounting base (not shown). A movable block of insulating material is attached to the tip of the movable iron core 11.
28A is connected, the tip of the movable side leaf spring 10A2 is loosely inserted into the groove 22A of the movable block 28A, and the tip of the movable side leaf spring 10A2 is bent in FIG. Are in contact.

On the other hand, in FIG. 7, on the left side of the operation unit 3,
In FIG. 7 in which the micro switch 21 is mounted on a mounting base (not shown) with the tip of the contact lever 21a on the movable block 28A side, and the operating portion 3 is in the excited state,
The tip of a is pushed by the engaging portion 28a protruding toward the left side in the middle of the movable block 28A driven in the direction of the operating portion 3 by the operating portion 3, so that a contact (not shown) inside is in contact.

In the electronic time switch constructed as described above, at a predetermined time of midnight, the solenoid of the operation section 3 is excited by a signal from a control section (not shown),
Movable block with movable iron core 11 as shown by arrow D
28A is driven, and the movable side leaf spring 10A2 and the contact lever are driven by the groove 22A and the engaging portion 28a of the driven movable block 28A.
The tip of 21a is bent, the contact 6A comes into contact, and the contact of the microswitch 21 is turned on. Then, power is supplied to the load connected to a watt-hour meter (not shown) for late-night power metering, and the control unit confirms the connection of the load by a signal from the microswitch 21. Further, when the set predetermined time elapses, the solenoid of the operation unit 3 is demagnetized by a signal from a control unit (not shown), and the movable iron core 11 and the movable block 28A are restored by the restoring force of the two movable side leaf springs 10A2. Then, the switch 20 and the micro switch 21 are opened, the load for late-night power (not shown) is disconnected, and the OFF signal of the micro switch 21 is input to the control unit (not shown) for confirmation.

FIG. 8 is a view showing a switch, an operating portion and a detecting portion of a conventional electronic time switch different from that shown in FIG.
In FIG. 8, for detecting the operation of the switch 20, a photo sensor 31 is attached instead of the micro switch 21 of FIG. 7, and the tip of the movable block 28B fixed to the tip of the movable iron core 11 of the operation unit 3 is moved. 9 is detected by a detection unit (not shown) attached to the inside of the inverted U-shaped groove of the photo sensor 31, as shown in FIG. 9 showing a partially enlarged perspective view of FIG. 8, and is input to a control unit (not shown).

[0008]

However, in the electronic time switch configured as described above, a space for mounting the micro switch 21 and the photo sensor 31 is required, so that not only the outer shape is increased but also the parts are increased. Increase,
There is also a possibility that the operation accuracy may decrease. Further, since accuracy is required for the mounting position, it takes time to adjust the position at the time of mounting, and the reliability of detection decreases. Therefore, an object of the present invention is to obtain an electronic time switch which is easy to assemble, can reduce the outer shape, and can reliably detect ON / OFF of a switch.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a control section for outputting a signal at a preset time and a leaf spring driven by a movable piece that operates according to the signal opens and closes contacts to load a load.・ In an electronic time switch equipped with a switch to be turned off and a detector that detects the on / off of the switch by driving a movable piece and outputs the signal to the control unit, in the leaf spring of the switch,
By installing a pair of leaf springs for detecting switch operation, which are driven by a movable piece and whose contact parts come in contact with and separate from each other, a leaf spring for opening and closing is incorporated into the switch for detecting opening and closing operation, and assembly is easy Is an electronic time switch that can reliably detect ON / OFF of a switch.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an electronic time switch of the present invention will be described below with reference to the drawings. FIG. 1 is a connection diagram showing the configuration of the electronic time switch of the present invention, and FIG. 2 is a layout diagram showing the configuration of the electronic time switch.

In FIGS. 1 and 2, a control board 1 is provided with a detection section 5 and a control section 4 which are not shown in detail, and the board 1 is detachably attached to a substantially square attachment base (not shown). It is attached to the upper surface of a cover (not shown) made of mild steel plate. A switch 2, an operating portion 3 and an external connection terminal 14 are attached to a mounting base (not shown). Of these, the switch 2 and the operating portion 3 are covered with the above-mentioned mild steel cover. Cover and substrate made of mild steel 1
Is covered with a glass cover (not shown) fixed to the mounting base. The proximal end of the movable block 8 is connected to the distal end of the movable iron core 11 inserted into the operation portion 3 as in the conventional case.

In the fixed block 9 of the switch 2, two sets of bases of a fixed side leaf spring 10A1 and a movable side leaf spring 10A2 penetrate and are fixed as in the conventional case. In addition, the electronic time switch of the present invention is further conventional. The fixed side leaf spring 10B1 of the same product as the fixed side leaf spring 10A1 of FIG.
A movable side leaf spring 10B2, which is the same product as A2, penetrates and is fixed, and these fixed side leaf spring 10B1 and movable side leaf spring 10B2.
At the tip of the, fixed side leaf spring 10A1 and movable side leaf spring 10A
Contact 6 of the same product as contacts 6A and 6B joined to the tip of 2
A and 6B are joined. On the other hand, the movable block 8 has a movable side leaf spring 10 on the right side in FIG.
A groove 12A in which the tip of A2 is loose is formed, and a groove in which the tip of the movable side leaf spring 10B2 is loose is formed at the tip of the movable block 8.
In FIG. 3 in which a groove 12B having the same shape as that of 12A is further formed and the operating portion 3 operated by the solenoid is in a non-excited state, the grooves 12A and 12B are formed.
The movable side leaf springs 10A2 and 10B2 come into contact with the side of the operating portion 3 and the contacts 6A and 6B are now in the separated state.

Each fixed side leaf spring 10A1, 10B1 of the switch 2
The terminal portion 10a at the base end and the external connection terminal 14 are connected to the external connection terminal 14 by an insulating cord wire 15A, and the fixed side leaf spring 10B
1 and the terminal 10b at the base end of the movable side leaf spring 10B2 are also connected to the input terminal of the detection section 5 by the insulated cord wire 15B, and the input terminal of the operation section 3 is connected to the output terminal of the control section 4 by the signal line 15C. There is. Of the external connection terminals 14, terminals 1L and 2L
Is connected to the input terminal of an electric meter 16 connected to the load side of this electronic time switch, and the output terminal of this electric meter 16 is connected to a load 17 that consumes late-night power. The terminals 1s and 2s are connected to a lead-in wire (not shown).

Next, the operation of the electronic time switch thus constructed will be described. At midnight operation time (for example, 23:00) set in the setting unit (not shown), the control unit 4
Sends an "ON" signal indicated by an arrow A1 in FIG. Then, the movable iron core 11 is attracted and the movable block 8 is driven as shown by an arrow C1 in FIG. 2, and the contacts 6A, 6B are closed by the bending of the movable side leaf springs 10A2, 10B2 as shown in FIG. Electric power is supplied to the load 17 through the watt-hour meter 16, and a state detection signal indicated by an arrow B for detecting a state in which the switch 2 is turned on is an insulated cord wire 15.
By flowing through B, the “on” state of the switch 3 is detected by the detection unit 5 and confirmed by the control unit 4. At this time, if the contact 6B is not closed for some reason, the "OFF" state is detected by the detection unit 5, and the control unit 4 to which the signal is input again transmits the "ON" signal. , Is repeatedly transmitted until the signal from the detection unit 5 becomes “ON”.

At the daytime electric power time set in the setting unit (not shown), the control unit 4 outputs a "OFF" signal to the operation unit 3 in the same manner as described above, and the movable side leaf springs 10A2, 10B.
The movable core 11 is projected by the restoring force of 2 as shown by the arrow C2 in FIG. 3, the movable block 8 returns to the state before the operation shown in FIG. 2, and the contacts 6A and 6B are opened. Then, the power supply to the watt-hour meter 16 and the load 17 is cut off, and the state detection signal from the detection unit 5 shown by the arrow B is also cut off. Therefore, the detection unit 5 detects the “off” state and the control unit 4 Confirmed in.
At this time, if the contact 6B is in the contact state, the control unit 4 repeatedly outputs the "OFF" signal by the signal from the detection unit 5 and confirms each time, until the "OFF" signal is input from the detection unit 5. repeat.

In the electronic time switch thus constructed, the fixed side leaf spring 10B1 and the movable side leaf spring 10B2, which are the same as the conventional fixed side leaf spring 10A1 and movable side leaf spring 10A2, are used as the fixed block 9 for detecting the switch operation. In addition, by slightly lengthening the fixed block 9 and the movable block 8, it is possible to detect "ON" and "OFF" of the switch 3, and a conventional micro switch or photo sensor is not required. The number of types of parts is reduced, which not only facilitates production and assembly including ordering of parts, but also requires no adjustment of mounting positions and places like conventional microswitches and photosensors. Therefore, the assembly time can be shortened.

FIG. 4 is a diagram showing another embodiment of the electronic time switch of the present invention. In FIG. 4, the fixed side leaf springs 10B1 and the movable side leaf springs 10B2 are attached at positions shown in FIG.
It is the reverse of FIG. 3, respectively. At this time, when each contact 6A is "ON", the contact 6B is "OFF". Therefore, when the current of the state detection signal B is cut off, the detection unit 5 detects the "ON" signal of the switch 2. By doing so, the control unit 4 confirms the "ON" state.

FIG. 5 is a view showing another embodiment of the electronic time switch according to the present invention, which is different from the switch 30 and the movable block.
Unlike FIG. 3 and FIG. 4, 18 indicates the closed state of the switch 30. 5, fixed side leaf spring 10A1 and movable side leaf spring 10A2
The mounting position is opposite to that in FIGS. 3 and 4, and the fixed side leaf spring 10B1 and the movable side leaf spring 10B2 are also reversed. Further, of the movable side leaf springs 10A2, the tip of the movable side leaf springs 10A2 closer to the operation portion 3 has a XX line in FIG.
5 and 6 as shown in FIG. 6 showing the enlarged detail view of the cross section.
, A long oval hole 10b is formed in advance in the left and right sides, a hole 10c having a shorter diameter than the hole 10b is formed at the tip of the movable side leaf spring 10A2 in the middle portion, and a hole 10b having a diameter is formed at the tip of the movable side leaf spring 10B2. A circular hole 10d having the same minor axis as 10c is formed. On the other hand, the movable block 18 connected to the tip of the movable iron core 11 is formed with a cylindrical portion 18c having a diameter slightly smaller than that of the circular hole 10d at the distal end, and is loosely inserted into the circular hole 10d. Has a cylindrical portion 18b whose major axis and minor axis are slightly smaller than the hole 10c and is loosely inserted in the hole 10c. Similarly, on the base side of the cylindrical section 18b, a cylindrical column whose major axis and minor axis are slightly smaller than the hole 10b. A portion 18a is formed and idles in the hole 10b. In this case, the operation unit 3 is excited by the "ON" signal output from the control unit 4 to the operation unit 3 and the movable iron core 11 is ejected as shown by an arrow C2 in FIG. Then, the movable iron core 11 returns to the inside. In this case as well, similar to the electronic time switch shown in FIGS. 2 to 4, the switch 30 is turned on and off without adding a state detection sensor.
It is possible to reliably detect the "off" state.

[0019]

As described above, according to the present invention, the contact is opened and closed by the control unit that outputs a signal at a preset time and the leaf spring that is driven by the movable piece that operates according to the signal, and the load is applied.
An electronic time switch equipped with a switch to be cut and a detector that detects the opening and closing of the switch by driving the movable piece and outputs the signal to the control section.The leaf spring of the switch is driven by the movable piece. By installing a pair of leaf springs for detecting switch operation adjacent to each other, the leaf springs for opening and closing are incorporated in the switch for detecting opening and closing operations, so assembly is easy and the external shape is reduced. Therefore, it is possible to obtain an electronic time switch capable of reliably detecting ON / OFF of the switch.

[Brief description of drawings]

FIG. 1 is a connection diagram showing an embodiment of an electronic time switch of the invention.

FIG. 2 is a layout view showing an embodiment of an electronic time switch of the invention.

FIG. 3 is a diagram showing the operation of the electronic time switch of the present invention.

FIG. 4 is a layout view showing another embodiment of the electronic time switch of the invention.

FIG. 5 is a layout view showing another embodiment of the electronic time switch of the invention.

FIG. 6 is an enlarged detailed view taken along line XX of FIG.

FIG. 7 is a diagram showing an example of a conventional electronic time switch.

FIG. 8 is a view showing an example of a conventional electronic time switch different from FIG.

9 is a perspective view showing a main part of the electronic time switch of FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Control board, 2 ... Switch, 3 ... Operation part, 4 ... Control part, 5 ... Detection part, 6A, 6B ... Contact point, 8 ... Movable block, 9 ... Fixed block, 10A1, 10B1 ... Fixed side leaf spring , 10A2, 10B2 ... Movable side leaf spring, 11 ... Movable iron core.

Claims (1)

[Claims] 1. A control unit that outputs a signal at a preset time, a switch that opens and closes a load by opening and closing a contact with a leaf spring driven by a movable piece that operates according to the signal, and the movable unit. In an electronic time switch equipped with a detection unit that detects ON / OFF of the switch by driving one piece and outputs the signal to the control unit, the leaf spring of the switch is contacted by the movable piece. An electronic time switch characterized in that a pair of leaf springs for detecting switch operation are provided adjacent to each other.