JPS6331324Y2 - - Google Patents

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a switch device suitable for a timer or the like.

<Prior art> Conventionally, in this type of device, an opening/closing lever for on/off control is capable of reciprocating between an off position and an on position, and a stopper is provided to hold the opening/closing lever in the on position. By removing the stopper from the lever by utilizing the deformation of the bimetal operating rod due to the heat generated by the resin, the opening/closing lever was switched from the on position to the off position, and the switch was turned on or off.

However, since the deformation starting position of the operating rod changes depending on the ambient temperature, the time it takes for the opening/closing lever to switch from the on position to the off position, that is, the time it takes for the switch to switch from the on state to the off state, is not constant. .

In view of the above, the present invention is a switch device that can maintain the time it takes for the open/close lever to switch from the on position to the off position (the time it takes for the switch to change from the on state to the off state) to be constant regardless of the ambient temperature. The purpose is to provide the following.

<Means for solving the problem> The problem solving means according to the present invention is a bimetallic operating rod 7 made of the same material as the operating rod 7, and deformed by the same amount in the same direction as the operating rod 7 due to changes in ambient temperature. By providing a correction rod 15, a stopper at the tip of the correction rod 15, and a hook 6 at the tip of the operating rod 7, the opening/closing lever 1 can be moved to the input position C.
The aim is to always keep the time required for switching from to cutting position A constant.

<Embodiment> An embodiment of the present invention will be described below with respect to a timer switch device shown in FIGS. , an opening/closing lever 1 that moves reciprocally between an off position A and an on position C to control both switches 4 and 5 on and off; A stopper 3 removably engaged with the lever 1
and a bimetallic operating rod 7 which is a plate-shaped electrically conductive body that detaches the stopper 3 from the lever 1 at the input position C by utilizing thermal deformation due to Joule heat.
A plate-shaped bimetallic atmospheric temperature correction rod 15 is fixed to the stopper 3 so that the stopper 3 is separated from the lever 1 by a constant amount of deformation of the operating rod 7 from the ambient temperature.

As shown in FIGS. 1 and 5, the first switch 4 is disposed in a box-shaped case 9 on the rear side of the lever 1, and its fixed contact 4b is disposed on the lever operating portion 1a side, and a plate-shaped The movable contact 4a can be brought into contact with and separated from the fixed contact 4b from below. And the movable contact 4a
The proximal end thereof is fixed in a cantilevered manner to the distal end 1b side of the lever 1, and has an inclined surface 4c that can be pressed by the presser plate 13 at the distal end on the lever operating portion 1a side.

As shown in FIGS. 1 and 3, the second switch 5 is arranged in a box-shaped case 9 on the front side of the lever 1, its fixed contact 5b is arranged on the lever tip 1b side, and the plate-shaped movable contact The fixed contact 5a can be brought into contact with and separated from the lower side of the fixed contact 5b. The movable contact 5a has its proximal end fixed in a cantilevered manner to the operating portion 1a side of the lever 1, and has an inclined surface 5c on the distal end 1b side of the lever 1 that can be pressed by the presser plate 13.

The lever 1 includes a straight rod 10 for opening/closing operation guided by a box-shaped case 9 so as to be linearly reciprocated, and the center portion of the straight rod 10 is rotatably supported via a horizontal shaft 11. The contact plate 13 is made up of a retaining piece 12 and a contact holding plate 13 fixed to the lower part of the straight rod 10.

The engaging piece 12 has a vertical part 12a that projects downward from the horizontal shaft 11, and a horizontal part 12c in which a notch 14 for engaging the stopper 3 and the hook 6 is formed at the tip on the lever operating part 1a side. It is formed into a horizontal L-shape.

Also, while urging the straight rod 10 toward the cut position A side (the side where the amount of protrusion of the lever operating portion 1a from the case 9 is larger), the horizontal portion 12c of the engaging piece 12 is moved upward a as shown in FIG. A coiled spring 2 for biasing the inner wall 9a of the case 9 and the straight rod 10
and the vertical portion 12a of the engaging piece 12.

Further, the contact holding plate 13 turns off the first switch 4 and turns on the second switch 5 at the cut position A of the straight rod 10, and turns on the first switch 4 and turns off the second switch 5 at the on position C. However, in order to turn on both switches 4 and 5 at the intermediate position B, the straight rod 10 is protruded from the center thereof in a direction perpendicular to the reciprocating direction of the straight rod 10.

The operating rod 7 is disposed parallel to the front side of the lever 1, and is supported in a cantilevered manner on the inner wall 9a of the case 9 on the lever tip 1b side so as to be thermally deformable in the vertical direction de. The insulating hook 6 is fixed to the tip of the side.

Further, the correction rod 15 is disposed parallel to the rear side of the lever 1 and supported in a cantilevered manner on the inner wall 9a of the case 9 on the side of the lever tip 1b so as to be thermally deformable in the vertical direction de. The stopper 3 is fixed to.

The operating rod 7 and the correction rod 15 are made of the same material, and a high-expansion metal is disposed on the upper side, so that they are bent downward (e) by thermal deformation and upward (d) by cooling deformation. Of the hook 6 and the stopper 3, the hook 6 is located closer to the operating portion 1a of the lever 1, and the lower ends of both are at the same level at ambient temperature. Further, the stopper 3 is pressed against the upper edge 12b of the horizontal portion 12c of the engaging piece 12, and has the function of regulating the upward movement of the engaging piece 12.

A power source 16 is interposed between the connecting portion 4d of the movable contact 4a of the first switch 4 protruding from the case 9 and the connecting portion 5d of the fixed contact 5b of the second switch 5 protruding from the case 9, Connection portion 4e protruding from case 9 of fixed contact 4b of first switch 4
A load 1 such as a hot air heater is connected between the connecting portion 5e of the movable contact 5a of the second switch 5 protruding from the case 9
7 is interposed to form an electric circuit 18. The second switch 5 and the operating piece 7 are electrically connected in parallel to form a parallel connection body 8.

In the figure, reference numeral 19 is a time adjustment screw that is in contact with the lower surface of the operating rod 7, and 20 is a cord that connects the operating rod 7 to the protruding connection portion 5e on the proximal end of the movable contact of the second switch 5.

Next, the effect will be explained. In the off position A of the lever 1, the presser plate 13 is in the position of the first switch 4, as shown in FIG.
Since it is located on the fixed contact 4b side, it does not act on the second switch 5 but only on the first switch 4, pushing down the inclined surface 4c of the movable contact 4a,
The second switch 5 is turned on and the first switch 4 is turned off.

Then, when the lever 1 is manually switched and slid from the off position A to the on position C against the spring 2, the presser plate 1
3 moves toward the fixed contact 5b of the second switch 5, the inclined surface 5 of the movable contact 5a of the second switch 5
c is pushed downward to turn it off. On the other hand, the first switch 4 is turned on when the presser plate 13 comes off the inclined surface 4c. However, the operating rod 7 is connected to the electric circuit 1.
8, current flows through the operating rod 7, which is electrically connected in parallel with the second switch 5.
Power is supplied to the load 17.

At the same time, the vertical portion 2b of the engaging piece 12 also springs 2.
As the horizontal portion 12c moves upwardly a around the horizontal axis 11 due to the urging force, the notch 14 engages with the stopper 3 of the correction rod 15 which is in pressure contact with the upper edge 12b of the engaging piece 12. Hold lever 1 in position C.

Then, when the current flows through the operating rod 7, it generates heat due to Joule heat and begins to undergo a thermal deformation in a downward direction e.
The hook 6 of the operating rod 7 begins to push the horizontal portion 12c of the engagement piece 12 downward b against the spring 2. Then, when a certain amount of heat is applied and the hook 6 of the operating rod 15 moves downward by a certain amount with respect to the stopper 3 after a certain period of time has elapsed, the horizontal portion 12c of the engaging piece 12 is removed from the stopper 3. Therefore, the lever 1 moves toward the cut position A side due to the biasing force of the spring 2, but the notch 14 of the engaging piece 12 engages with the hook 6 of the operating rod 7 on the way, so the lever 1 is held at the intermediate position B. be done.

At this time, as shown in FIG. 4, the holding plate 13 moves to a position where it does not act on the movable contacts 4a and 5a of both switches 4 and 5, and the first switch 4 and second switch 5 are turned on and the load is Continue to supply power to 17. In addition, stopper 3 and hook 6
are attached to the correction rod 15 and the operating rod 7, which are made of the same material, respectively, and are at the same level at the cutting position A. Therefore, even if the ambient temperature changes, both of them deform by the same amount, and the hook 6 deforms by a certain amount due to the constant Joule heat, and the stopper 3 comes off, so the time it takes to switch from the input position C to the intermediate position B is Always constant.

The current flows through the connection body 8, but since the resistance of the operating rod 7 is greater than that of the second switch 5, the current flows to the second switch 5 side of the parallel connection body 8.
The operating rod 7 begins to cool down, begins to restore shape upward d, and after a certain period of time from when it reaches the intermediate position B, the hook 6 finally moves up to the same level as the lower end of the stopper 3 of the compensation rod 15, and the hook 6 6 is removed from the notch 14 of the engaging piece 12, and the lever 1 is switched to the cut position A by the spring 2, turning off the first switch 4 and interrupting the circuit 18. At this time, the stopper 3 comes into contact with the upper edge 12b of the horizontal portion 12c of the engaging piece 12 to restrict the rotation of the engaging piece 12 around the horizontal axis 11 due to the spring 2, and the stopper 3 also contacts the upper edge 12b of the horizontal portion 12c of the engaging piece 12. 15, the switching time from intermediate position B to cutting position A is always constant even if the ambient temperature changes.

As described above, the timer switch device can control the time required for the operating rod 7 to be thermally deformed downward e and cooled and restored upward d. In addition, the operating rod 7 deforms depending on the ambient temperature, and the correction rod 15 made of the same material also deforms in the same way.
is also deformed downward e and pushes the engagement piece 12 downward. Therefore, the operating rod 7 is thermally deformed downward e from the input position C where the first switch 4 is turned on, and the hook 6 of the operating rod 7 moves it from the notch 14 of the engagement piece 12 to the stopper 3.
The time required for the hook 6 to be removed from the intermediate position B and the time taken from the intermediate position B until the hook 6 is cooled and restored and switched to the cut position A where the hook 6 is removed from the notch 14 of the engaging piece 12 can be kept constant.

<Effects of the invention> As is clear from the above explanation, in the present invention, the operating rod and the correction rod are made of the same material,
Since the lever moves by the same amount in the same direction depending on the ambient temperature, the stoppers and hooks fixed to the tips of these levers can keep the lever held at the engaged and intermediate positions constant regardless of the ambient temperature. If the switch device according to the invention is used as a timer, it has an excellent effect of being able to accurately set the power supply time regardless of whether it is summer or winter.

[Brief description of the drawings]

Fig. 1 is a plan view of a switch device showing an embodiment of the present invention in the lever off position, Fig. 2 is a side sectional view of the same, Fig. 3 is a front sectional view of the same, and Fig. 4 is a front view of the same lever in an intermediate position. 5 is a front sectional view of the same lever in the on position, and FIG. 6 is an electric circuit diagram of the same lever in the off position. A...off position, B...intermediate position, C...on position, 1...open/close lever, 2...spring, 3...stopper, 4...first switch, 5...second switch, 6... ...Hook, 7...Operation rod, 8...Parallel connection body, 9...Case, 13...Press plate, 15...
Correction rod.

Claims (1)

[Scope of utility model registration request] A first switch 4 and a second switch 5 for connecting to both ends of the load 17, and a bimetallic operating rod 7 electrically connected in parallel to the second switch 5.
and an ambient temperature correction rod 15 which is made of the same material as the operating rod 7 and deforms by the same amount in the same direction as the operating rod 7 due to changes in ambient temperature, and reciprocating switching between the OFF position A and the ON position C. The lever 1 is provided with a freely movable opening/closing lever 1 for controlling a switch, and the lever 1 can be switched between an off position A, an intermediate position B, and an on position C, and a straight rod 10 guided by a case 9 so as to be linearly reciprocated.
, an engaging piece 12 rotatably supported on the straight rod 10 via a horizontal shaft 11, and a contact presser plate 13 fixed to the straight rod 10, the presser plate 13
At the cut position A of the straight rod 10, the first switch 4 is turned off and the second switch 5 is turned on, at the input position C, the first switch 4 is turned on and the second switch 5 is turned off, and at the intermediate position B, both switches are turned off. It is arranged at a position where the switches 4 and 5 are turned on, and a notch 14 is provided at the tip of the engaging piece 12.
is formed, and detachably engages with the notch 14 to hold the lever 1 at the engaged position C, and abuts the engagement piece 12 at the intermediate position B to rotate the engagement piece 12 in the hook engagement direction. A stopper 3 is fixed to the tip of the correction rod 15, and the stopper 3 is detached from the lever 1 in the engaged position C, and is removably engaged with the notch 14 to move the lever 1 to the intermediate position. A hook 6 for holding in position B is fixed to the tip of the operating rod 7, urging the straight rod 10 toward the cutting position A and urging the engaging piece 12 in the direction in which the stopper 3 and the hook 6 engage. A switch device characterized in that a spring 2 is provided for biasing the switch.