JPH0532907Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention relates to an illuminated push button switch, and more particularly to an illuminated push button switch that is arranged to prevent erroneous operation of the contact portion when changing the light emitter.

(Prior Art) Generally, in an illuminated push button switch, when converting a lamp, the illumination part consisting of a push button and a lamp holder is pulled out from the case, and after replacing the lamp,
It is designed to be inserted again into the case and fixed. Therefore, the contact section installed in the lower part of the case operates during this insertion, and an unnecessary signal is generated, which causes the controlled device to malfunction.

To solve this problem, for example,
There is an erroneous operation prevention device described in Publication No. 49925.

This erroneous operation prevention device is shown in FIG.

In this figure, an erroneous operation prevention device 70 is provided that prevents malfunction of the contact section when replacing the lamp of the push button switch that constitutes the illumination section. This erroneous operation prevention device 70 includes projections 86, 87 and a lamp holder 82.
An L-shaped plate spring 83 is pivotally supported near the bent portion on a fulcrum 84 of the outer wall of the holder. Leaf spring 83
is provided with a locking pawl 88 at the tip of one leg 89, which restricts the stroke of the push button 80 by engaging with a recess 81 formed at the end of the push button 80. When the lamp holder 82 is inserted into a predetermined position and the pressing force of the push button 80 is released, the other leg piece 85 of the leaf spring 83 comes into contact with the protrusion 86 of the case 90 and engages the locking pawl 88 and the recess 81. Disengage the plate spring 8.
Release the leg piece 89 on one side of No. 3 to the outside.

(Problem to be solved by the invention) However, since the conventional example uses a leaf spring, the elastic force is generated only by the bending angle of the L-shape, making it difficult to adjust.
When the other leg comes into contact with the protrusion during installation, it is difficult to accurately obtain the elastic force and distance necessary to remove the locking claw from the recess.

Further, since the leaf spring must be bent into an L-shape and processed to form a pivot portion, there is a problem in that the manufacturing cost is high.

This invention eliminates unnecessary movement of the contact when reinserting the lamp holder into the housing after replacing the light emitter, and also facilitates processing while ensuring the spring force always required by the erroneous operation prevention device. It is an object of the present invention to provide an illuminated push button switch with low manufacturing cost.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides an illuminated push button switch in which a torsion coil spring is provided as an erroneous operation prevention device in a lamp holder.

(Function) According to the present invention, since it is configured as described above,
The erroneous operation prevention device, that is, the torsion coil spring 16 provided to prevent erroneous operation at the contact portion when replacing the light emitter, prevents erroneous operation when the lamp holder is assembled, and accurately accumulates elastic force without buckling.

Further, since the coil spring 16 is pivotally supported by the shaft 11 through the bearing portion 51, it rotates so that the stepped portion locking portion 52 and the engaging portion 54 can move easily. Engagement part 54
engages with the concave groove 12 and at the same time adjusts the amount by which that portion protrudes from the lower surface of the lamp holder 9, thereby accumulating the elastic force of the stepped portion locking portion 52 against the stepped portion 46. The stepped portion locking portion 52 fixes the lamp holder 9 between the positioning protrusion 44 and the stepped portion 46 of the housing 20.

Further, the step locking portion 52 fixes the distance between the lamp holder 9 and the plunger 4, and acts to prevent the plunger 4 from accidentally operating the micro switch 41 when the lamp holder 9 is attached to the housing 20.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

Figure 1 is a front sectional view of the illuminated push button switch of the present invention, Figure 2 is a side sectional view of the illuminated push button switch of the present invention, Figure 3 is an exploded perspective view of the illuminated push button switch of the present invention, and Figure 4 is an exploded perspective view of the illuminated push button switch of the present invention. The figure is a perspective view showing the torsion coil spring of the present invention, and FIG. 5 is an explanatory view showing the procedure for attaching the lamp holder of the present invention.

As shown in these figures, the button 1 is translucent or semi-transparent so that it can be displayed with a lamp, and can also be displayed with a color or symbol, and has an engaging opening 3 on the opposite side. It has elastic legs 2 that project downward.

The plunger 4 has a frame shape with a through hole 6 in the center, has an engaging protrusion 5 on opposite sides in one direction, and has leg pieces 7 projecting downward on opposite sides in the other direction.
By fitting the engagement opening 3 of the elastic leg 2 into the engagement protrusion 5 and attaching the button 1 to the plunger 4, a lighting section is constructed.

The lamp holder 9 has a cylindrical portion 14 provided with a terminal for fixing the light emitter 17, and has a guide groove 10 for slidingly guiding the leg piece 7 and a torsion coil spring 16 on one side of the outer periphery.
and a shaft 11 for pivotally supporting the bearing portion 51 of the
Moreover, a concave groove 1 for engaging the engaging portion 54 of the torsion coil spring 16 is provided on one side of the outer periphery adjacent to this side.
2, a spring receiver 15 is provided at a diagonal point thereof, and a substrate portion 13 having a lead terminal portion from a light emitting body 17 on the lower surface is integrally formed.

The shaft 11 may be formed separately from the substrate portion 13, and its shape may be various, such as a cylindrical shape or a retaining shape.
In short, any shape may be used as long as it supports the torsion coil spring 16 axially.

As shown in a perspective view in FIG. 4, the torsion coil spring 16 includes a bearing portion 51 wound a plurality of times, a stepped locking portion 52 having a locking end 53 provided at one end of the bearing portion 51, and a bearing portion 52. It consists of an engaging part 54 provided at the other end of the part 51, and a stepped part locking part 52 and an engaging part 54.
The relationship between the torsion coil spring 16 and the torsion coil spring 16 is approximately V-shaped when viewed from the length direction of the torsion coil spring 16. The bearing part 51 is the shaft 1
Its shape is determined by its relationship with 1, and is, for example, cylindrical. The action of the step locking portion 52 is that in normal operating conditions, the locking end 53 is attached to the step portion 4 of the housing.
6 is sufficient, and the stepped portion locking portion 52
Since the entire shape may be any shape, for example, if the stepped portion locking portion 52 is approximately linear, manufacturing is easy. The engaging portion 54 is connected to the torsion coil spring 1
The lamp holder 6 is formed into a bent shape as shown in FIG. 4, for example, so as to be engaged with the groove 12 of the lamp holder 9 when the lamp holder 6 is attached. A coil spring 8 is disposed between the spring receiver 15 of the lamp holder 9 and the spring receiver of the plunger 4, and the torsion coil spring 16 is rotated while the leg piece 7 of the plunger 4 is oscillatedly guided to the guide groove 10 of the lamp holder 9. A bearing portion 51 is pivotally supported on the shaft 11, and its engaging portion 54 is loosely fitted into the groove 12. In this state, the engaging portion 54 of the torsion coil spring 16 is engaged with the groove 12 of the lamp holder 9, and as shown in FIG. It protrudes from the bottom surface of 9. When the temporary assembly of the plunger 4 and lamp holder 9 is inserted into the housing 20, the torsion coil spring 16 is first pushed by the stepped portion 46 of the housing 20.
As shown in FIG.
Come to the position facing 5. As you insert more,
The engaging portion 54 of the torsion coil spring 16 is rotated and pushed downward, and as shown in FIG.
It comes into contact with the positioning protrusion 44 of. At this time, at the same time, due to the force of pushing down the button 1, the engaging end 53 of the opposing torsion coil spring 16 fits into the recess 45 of the plunger 4, stopping the pushing operation of the button 1.
Micro switch 4 by further pressing button 1
Prevent erroneous operations in step 1. At this time, furthermore, Fig. 5a
The portion of the engaging portion 54 of the torsion coil spring 16 that projects downward from the lower surface of the lamp holder 9 shown in FIG.
As shown in FIG. 5b, when the torsion coil spring 16 is rotated upward, the stepped locking portion 52 and the engaging portion 54 are rotated upward.
However, they accumulate a repulsive force in the direction of moving away from each other. At this time, the coil spring 8 is compressed by a short stroke until the locking end 53 of the torsion coil spring 16 comes into contact with the bottom of the recess 45. From this state, when the pressing force applied to the button 1 is released, the plunger 4 returns upward due to the accumulated elastic force of the coil spring 8. Accordingly, the locking end 53 of the torsion coil spring 16 and the recess 4 of the plunger 4
5, the step locking portion 52 of the torsion coil spring 16 rotates in the direction of the step 46 of the housing 20 due to the accumulated elastic force, and as shown in FIG.
As shown in FIG. 2, the locking end 53 is locked to the stepped portion 46. As a result, the stepped locking portion 52 of the torsion coil spring 16 no longer acts as a stopper for the plunger 4, so that the button 1 can be pressed down to its full stroke as shown in FIG. You will be able to do this.

In FIG. 3, the housing 20 has a cylindrical shape and has the positioning protrusion 44 protruding inside.
A plurality of protrusions 21 are provided on the outer wall. The mounting spring 22 is formed by integrally providing an elastic mounting leg 25 with a substantially U-shaped frame portion 24 having a fitting opening 23 at a predetermined position. This mounting spring 22 has its fitting opening 2
3 into the protrusion 21 of the housing 20, and
It is attached by clamping the housing 20 with an elastic force of 4. The converter 26 has a substantially U-shape, and has a shaft portion 27 on the outside of the opening end, and a hook pin 28 fixed on the outside of the side facing the shaft portion 27. The actuating plate 30 has a substantially square shape, and has a shaft portion 32 on the outside of one of the opposite sides.
and a spring locking portion 31 on the other inner side.
Two micro switches 41 are arranged with an insulating plate 40 in between, and the base 3 is connected through these through holes 42.
Fit the protrusion 39 of 5 into the receiving hole of the base 43, and connect both the micro switches 41, 4 with both bases 35, 43.
1 and an insulating plate 40 are clamped and fixed. The shaft portion 27 is locked in the bearing recess 37 so that the tip of the hook pin 28 is guided by the heart cam 38 of the base 35, and the actuating plate 30 is disposed below the converter 26.
is locked in the bearing recess 36, and the converter 26 and the actuating plate 3 are
The reversing spring 29 is attached between the spring locking portion 31 of 0. The light emitter terminal 33 is fitted into the outer groove of each base 35, 43 and temporarily assembled as a unit. Insert this unit from below the housing 20, and fix both bases 35, 43 and the housing 20 at a position where the contact portion 34 of the light emitter terminal 33 contacts the lead terminal of the light emitter 17 on the lower surface of the lamp holder 9. . When the button 1 is pressed from this state, the leg piece 7 of the plunger 4 swings the converter 26, so the actuating plate 30 is reversed via the reversing spring 29, and the push button of the micro switch 41 can be driven. .

Note that the present invention is not limited to the above-mentioned embodiments, and various modifications can be made based on the gist of the present invention, and these are not excluded from the scope of the present invention.

(Effects of the invention) As described above in detail, according to the invention, the following effects can be achieved.

(1) In the illuminated push button switch of claim 1,
Since a torsion coil spring is used for the erroneous operation prevention device, compared to the conventional plate spring type,
It requires simple processing of existing wire rods, making manufacturing and processing easy and inexpensive. Furthermore, if a ready-made coil spring is used, it will be easier to process and cheaper. Moreover, it is possible to prevent erroneous operation when assembling the lamp holder.

(2) In the illuminated push button switch of claim 2,
Since the stepped locking part and the engaging part are formed at both ends around the bearing part, if an existing coil spring is used for the bearing part, only machining of both ends is required.
Elasticity does not change easily and elasticity easily accumulates.

(3) In the illuminated push button switch of claim 3,
The stepped portion locking portion is substantially linear, and the engaging portion is simply formed by bending, so it is easy to process.

(4) In the illuminated push button switch of claim 4,
The elastic force of the bearing part can serve both as an accumulation action and as a pivot action on the shaft, so the engaging part does not get caught in the positioning protrusion, and the step locking part acts as a device to prevent erroneous operation during assembly. This has the effect of preventing that effect from working.

[Brief explanation of the drawing]

Figure 1 is a front sectional view of the illuminated push button switch of the present invention, Figure 2 is a side sectional view of the illuminated push button switch of the present invention, Figure 3 is an exploded perspective view of the illuminated push button switch of the present invention, and Figure 4 is an exploded perspective view of the illuminated push button switch of the present invention. FIG. 5 is a perspective view showing the torsion coil spring of the present invention, FIG. 5 is an explanatory diagram showing the installation procedure of the lamp holder of the present invention, and FIG. 6 is a diagram showing a conventional example. 1...Button, 2...Elastic leg, 3...Engagement opening, 4
... Plunger, 5 ... Engaging projection, 6 ... Through hole, 7 ... Leg piece, 8 ... Coil spring, 9 ... Lamp holder, 10 ... Guide groove, 11 ... Shaft, 12 ...
...Concave groove, 13...Substrate part, 14...Cylinder part, 15...
...Spring receiver, 16...Torsion coil spring, 17...
...Light emitter, 20...Housing, 21...Protrusion,
22... Mounting spring, 23... Fitting opening, 24...
Frame portion, 25...Elastic mounting leg, 26...Converter, 2
7... Shaft portion, 28... Hook pin, 29... Reversing spring, 30... Operating plate, 31... Spring locking portion, 3
2...Shaft part, 33...Light emitter terminal, 34...Contact part, 35, 43...Base, 36, 37...Bearing recess, 38...Heart cam, 39...Protrusion, 40
...Insulating plate, 41...Micro switch, 42...
...Through hole, 44... Positioning projection, 45... Recess, 46... Step, 51... Bearing part, 52... Step locking part, 53... Locking end, 54... Engaging part .

Claims (1)

[Claims for Utility Model Registration] (1) It has a plunger, a lamp holder, and a housing, and when the lamp holder assembled with the plunger is inserted into the housing, the distance between the plunger and the lamp holder is defined by an error prevention device. 1. An illuminated push button switch according to the invention, characterized in that the erroneous operation prevention device is a torsion coil spring and is provided on a lamp holder. (2) The illuminated type according to claim 1, wherein the torsion coil spring is constituted by a bearing portion, a stepped locking portion provided at one end of the bearing portion, and an engaging portion provided at the other end of the bearing portion. Push button switch. (3) The illuminated push button switch according to claim 2, wherein the torsion coil spring is wound a plurality of times to form a bearing portion, formed into a substantially straight line to form a stepped locking portion, and bent to form an engaging portion. (4) After pivoting the bearing part to the shaft of the lamp holder, contacting the engaging part with the positioning protrusion of the lamp holder, and engaging the stepped part locking part in the recess of the plunger, engage the stepped part of the housing. 4. The illuminated push button switch according to claim 2, wherein the push button switch has a light-emitting push button.