JPH02996Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a delay switch that opens or closes after a predetermined period of time has elapsed after the switch is activated.

Conventionally, delay switches have been proposed for electric lights in entrances and bedrooms, exhaust fans in toilets, etc., which open and close the load after a certain period of time by operating the switch.

However, these delay switches perform delayed operation using an oil doss pot device, and have drawbacks such as the fact that a certain delay time cannot be obtained unless the open or closed state is maintained for a certain period of time when opening or closing the switch. However, those that use a synchronous motor have drawbacks such as high cost and the need for a power source for the synchronous motor.

The present invention was devised in view of these points, and its purpose is to provide a delay switch that is reliable in its delay operation, can easily handle various delay times, and is also safe and robust. In the present invention, the delay switch is comprised of a clock timer, a winding lever and a fixed cam fixed to the main shaft protruding from the side plate of the clock timer, and a through hole loosely fitted into the protruding piece of the fixed cam. A movable cam, a protrusion that engages with the movable cam at one end, and an opening/closing operation protrusion that operates an opening/closing mechanism at the other end, the cam being mounted on a cam crankshaft protruding from the side plate of the clock timer. a crank; a movable shaft that presses the end of the winding lever; and a holding plate that is constantly energized and that locks and holds the winding lever on the locking step when the movable shaft pushes the winding lever; , a timer starting protrusion protruding from the lower end for pressing the retaining plate to disengage the winding lever and the locking step of the retaining plate, and an opening/closing operator that presses down the movable shaft in the closed state. The clock-type timer is configured to open or close with a delay from the pushing operation of the opening/closing operator, and the opening/closing mechanism is configured to operate immediately before the clock-type timer completes its operation. has been achieved.

The present invention will be described in detail below with reference to embodiments shown in the drawings.

Reference numeral 1 denotes a switch case molded from synthetic resin, and terminal fittings 2 and 3 are housed in the case 1, similar to a conventional switch without a slow-acting function. Fixed contact 4a
A movable spring 5 provided with a movable contact 4b, which also forms the main opening/closing mechanism 4, is provided in a protruding manner. Reference numeral 6a denotes a terminal spring for press-connecting one electric wire inserted through the electric wire connection hole 7 drilled in the bottom plate 1b of the case 1 to the terminal fitting 2, and the other electric wire is connected to the terminal forming the fixed contact 4a. A pressure connection is made by a spring 6b. The tip end 5a of the movable spring 5 is fixed to a fulcrum shaft 10 of an opening/closing operator 9 that protrudes from an opening 8 formed in the upper lid 1a of the case 1 and is supported, so that the opening/closing operator 9 can be pressed and tilted. By doing so, the fixed contact 4a and the movable contact 4b are connected and disconnected, and the main opening/closing operation is performed. The opening/closing operator 9 is integrally provided with a timer starting protrusion 9a which, by pressing and tilting, presses a retaining plate 17 to be described later to the outside of the case to operate a timer which will be described later. Reference numeral 11 denotes a timer having a clock mechanism inside, and the side plate 11a of the timer 11 has a main shaft 11b for winding up a mainspring (not shown) housed inside and extracting the return force of the mainspring as rotational force. It stands out. The main shaft 11b includes a winding lever 12 and a fixed cam 1.
3 is fixedly attached, and between the winding lever 12 and the fixed cam 13, there is an end edge 13a of the fixed cam 13.
A through hole 14a is formed integrally with a part of the frame to engage with a protruding piece 13b formed therein, and a V-shaped notch 14c is provided at the center of the peripheral edge 14b to engage with a cam crank which will be described later.
A movable cam 14 having a shape formed therein is mounted so as to penetrate through the main shaft 11b. A cam crankshaft 11c is provided on the side plate 11a of the timer 11 and projects diagonally above the main shaft 11b.
The cam crank 1c has a protrusion 15a that engages with the movable cam 14 on one side, and an opening/closing operation protrusion 15b that operates a sub-opening/closing mechanism to be described later on the other side.
5 is rotatably attached. The cam crankshaft 11c also serves as abutting against the winding lever 12 to prevent the mainspring from being released. Further, inside the case 1, when the opening/closing operator 9 is tilted in the closing direction, a pressing part 16a that moves downward and is formed at the lower end of the opening/closing operator 9 acts to push down the winding lever 12 and wind up the mainspring. Also, a locking protrusion 16b for holding the movable shaft 16 in a fixed position.
A movable shaft 16 having an integrally protruding movable shaft 16 is fitted therein. A retaining plate 17 is fitted adjacent to the movable shaft 16, and the retaining plate 17 is formed with a slope 18a that expands downward on the side surface at the upper side. A locking step portion 18b for locking the lever 12 is formed. Note that the holding plate 17 is loosely attached to the top surface 1c of the bottom plate 1b of the case 1 with the tip 20a of the presser metal fitting 20 fixed to the top surface 1c of the bottom plate 1b of the case 1 through a through hole 17a formed in the lower end of the holding plate 17. It is fitted. The holding plate 17' is urged inward of the case by a dogleg-shaped spring 21 interposed between the holding plate 17 and the case 1. Yet another 2
Reference numeral 2 denotes a sub-opening/closing mechanism consisting of a micro switch for opening/closing the power supply with a delay, and a switch lever 22a protruding from the upper end is opened/closed by the movement of the opening/closing operating protrusion 15b provided on the cam crank 15. 23 is a neon tube, which is used to check the power supply and the position of the switch in a dark place through a through hole 9b formed in the opening/closing operator 9 and a transparent or translucent plate 9c covering the through hole 9b. This is for confirmation.

Next, the operation and effect of the delay switch according to the present invention will be explained when the delay switch of the present invention is used in the wiring circuit of a toilet or the like shown in FIG.

First, when the opening/closing operator 9 protruding from the case 1 is pressed and tilted toward the closing side in FIG.
moves, the fixed contact 4a and the movable contact 4b come into contact with each other, the main opening/closing mechanism 4 is brought into a closed state, and the lighting L is turned on. At the same time, as shown in FIG. 5, the movable shaft 16 is pushed down by the opening/closing operator 9 to
The winding lever 12 is rotated to wind up the mainspring, and the fixed cam 13 and movable cam 14 are
Since the cam crank 15 rotates clockwise as shown by the arrow, the cam crank 15 rotates counterclockwise as shown by the arrow from the state shown in FIG. , the sub-opening/closing mechanism 22 is closed and the ventilation fan F is operated. At this time, the winding lever 12 slides on the slope 18a of the holding plate 17, and the locking step 1 of the holding plate 17 urges the case 1 inward, that is, the winding lever 12 side.
8b, the evacuation fan continues to rotate.

Then, when the opening/closing operator 9 is pressed and tilted to the open position, the fulcrum shaft 10 rotates in the opposite direction to that described above in FIG. 6, the main opening/closing device 4 is placed in the open state, and the illumination L is turned off. At the same time, as shown in FIG.
The winding lever 12 is disengaged from the locking step 18b of the holding plate 17, and the clock timer 11 is activated. At this time, the opening/closing operation protrusion 15b pushes the switch lever 22a until a predetermined set time comes, so the sub opening/closing mechanism 22 maintains the closed state. Then, when a predetermined set time has elapsed, the notch 14c of the movable cam 14 and the protrusion of the cam crank 15 are removed just before the winding lever 12 hits the cam crankshaft 11c acting as a stop pin, that is, just before the timer operation is completed. 15a, the cam crank 15 is rotated, and the sub opening/closing mechanism 22 is returned to the open state, so that the evacuation fan is stopped. In the above operation, the winding lever 12 and the fixed cam 13 are fixed to the main shaft 11b protruding from the side plate of the timer, so the winding lever 12 and the fixed cam 13 rotate together with the main shaft 11b. Further, the movable cam 14 has a protruding piece 13b of the fixed cam in its through hole 14a.
Since the movable cam 14 is loosely fitted, the movable cam 14 rotates at the same time as the fixed cam 13 when winding up the mainspring. Furthermore, when the timer operates, when the notch 14c of the movable cam 14 and the protrusion 15a of the cam crank 15 engage, the fixed cam 13
moves gradually, but since the protruding piece 13b of the fixed cam is loosely fitted into the through hole 14a of the movable cam 14, the notch 14c of the movable cam 14 and the protruding part 15a of the cam crank 15 are instantly engaged. This prevents the opening/closing protrusion 15b from gradually separating from the switch lever 22a, thereby preventing the contact from gradually breaking and causing an arc. The relationship among the main shaft 11b, fixed cam 13, and movable cam 14 is clear from FIG. 1, which is an exploded perspective view.

FIG. 8 shows another embodiment using the delay switch of the present invention, which differs from the embodiment shown in FIG. This is when lights, etc. are turned off after a certain period of time has passed, and is effective as a switch in entrances and hallways.

Since the present invention is constructed as described above, it provides a delay switch whose delay operation is accurate and reliable, which can easily handle various delay times, and which is safe, robust, and durable. Furthermore, when the delay switch is operated by a microswitch using a cam crank, the delay switch operates instantaneously and has various effects such as preventing arcing at the contact points.

[Brief explanation of drawings]

1 to 6 show an embodiment of the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a front view, FIG. 3 is a plan view with the lid removed, and FIG. 4
The figure is a central longitudinal sectional front view of Fig. 3, Fig. 5 is a longitudinal sectional front view taken along the line A-A in Fig. 3 and shown in relation to Fig. 2, and Fig. 6 is a longitudinal sectional front view taken along the line B-B in Fig. 3. The figure is shown with respect to FIG.
7 and 8 are circuit diagrams showing an embodiment using the delay switch of the present invention. 1a...Top lid, 1b...Bottom plate, 1...Case,
2, 3...Terminal fitting, 4...Main switchgear, 4a...
...Fixed contact, 4b...Movable contact, 5...Movable spring, 5a...Tip, 6a, 6b...Terminal spring,
7... Wire connection hole, 8... Opening, 9... Opening/closing operator, 9a... Timer starting projection, 10... Fulcrum shaft, 11... Timer, 11a... Side plate, 11b
... Main shaft, 12 ... Winding lever, 13 ... Fixed cam, 14 ... Movable cam, 14a ... Through hole, 1
4b... Periphery, 14c... Notch, 15... Crank, 15a... Protrusion, 15b... Opening/closing operation protrusion, 16... Movable shaft, 17... Holding plate, 18a...
...Slope, 18b...Locking step, 19...Piss, 2
0... Presser metal fitting, 20a... Tip, 21... Spring, 22... Sub-opening/closing mechanism, 22a... Switch lever, 23... Neon tube.

Claims (1)

[Scope of utility model registration request] A clock timer 11, a winding lever 12 fixed to a main shaft 11b protruding from a side plate of the clock timer, a fixed cam 13, and a movable cam 14 in which a through hole 14a is loosely fitted into a protruding piece 13b of the fixed cam.
and a protrusion 15 at one end that engages with the movable cam 14.
a, and the other end thereof is formed with an opening/closing operation protrusion 15b for operating the opening/closing mechanism 22, and presses the cam crank 15 attached to the cam crank shaft 11c protruding from the side plate of the clock type timer and the end of the winding lever 12. a movable shaft 16, which is always biased and which locks and holds the winding lever 12 on the locking step 18b when the movable shaft 16 pushes the winding lever 12; By pressing the plate 17, the locking stepped portion 18 between the winding lever 12 and the holding plate 17
The clock-type timer 11 has a timer start protrusion 9a protruding from its lower end for disengaging from the opening/closing operator 9, and has an opening/closing operator 9 that presses down the movable shaft 16 in the closed state. The opening or closing operation is delayed from the pushing operation, and the opening/closing mechanism 22
A delay switch characterized in that it is configured to operate immediately before the clock-type timer 11 completes its operation.