JPH10125164A - Push-on switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To suppress the occurrence of rattle at the time of a pushing action by providing a hooking taper section on the outside of the rear bottom face of a switch case, and biting the pawl sections of a holding metal into the locking tapered section to fix it. SOLUTION: A holding metal 11 having a U-shaped in the top view is fitted to cover the opening portion of a switch case 10 with its center front face section. The operation section 5A of a push button 5 is protruded forward from the through hole section of the front face section of the holding metal 11. Pawl sections 11C are provided at the rear end section of both side face sections extended backward along both side faces of the switch case 10 from the front face of the holding metal 11 and having wiring board fitting leg sections 11B at the lower ends. The front sections of a tongue piece connected on the rear side and formed into a U-shape by shear matching are bent inward to form the pawl sections 11C. The tips of the pawl sections 11C at the rear of the holding melt 11 are inserted to bite the tapered lock sections 10B of the switch case 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a push-on switch used as an operation button of various electronic devices.

[0002]

2. Description of the Related Art In recent years, as electronic devices have become smaller and thinner, push-on switches for operation buttons have become smaller and smaller.
There has been a demand for thin and various configurations, and a lateral push type push-on switch that is operated in a horizontal direction with respect to a wiring board has been used in many cases.

The structure of this lateral push type push-on switch is disclosed in Japanese Utility Model Laid-Open Publication No. Sho 62-173123 or the like, and the structure thereof will be described below with reference to FIGS.

FIG. 7 is a side view of a conventional push-on switch, and FIG. 8 is a sectional view taken along line AA of FIG.

In FIG. 1, reference numeral 1 denotes a box-shaped switch case to which terminals 2 and 3 are fixed by insert molding, and fixed contacts 2 A and 3 A which are electrically connected to the terminals 2 and 3, respectively, on the inner bottom surface of the switch case 1. Are exposed to the outside and the center, respectively. A dome-shaped movable contact 4 made of a thin metal plate capable of inverting operation is placed on the exposed portion of the fixed contact 2A on the outside so that the lower end thereof is in contact with the operation portion 5A. It is enclosed in the switch case 1 together with the provided push button 5 made of a hard molding resin.

[0006] Then, a holding bracket 6 having a U-shape in a top view,
Four dowels 1A provided on the front surface of the switch case 1 are attached by caulking so as to cover the opening portion of the switch case 1 with a central front portion.
The operation unit 5A projects forward from a through hole 6A on the front surface of the holding bracket 6.

The push button 5 is sandwiched by the rear pressing projection 5B contacting the top of the movable contact 4 and the front surface of the central flange 5C contacting the front surface of the holding fitting 6. And can slide in the front-back direction.

A claw portion 6C extends rearward from the front surface of the holding bracket 6 along both side surfaces of the switch case 1 and has a leg portion 6B for mounting a printed circuit board at a lower end thereof. , Which is bent rearward on the bottom surface of the switch case 1 to form a detent portion for pressing the switch case 1 rearward.

The conventional lateral push type push-on switch having the above-described structure is a printed wiring board (not shown).
And legs 6B provided on the side surfaces of the terminals 2 and 3 and the holding bracket 6.
Can be firmly attached by soldering.

Next, the operation of the lateral push type push-on switch having such a configuration will be described. When the operating portion 5A of the push button 5 is pressed in the horizontal direction, the push button 5 moves backward, and the push button 5 moves. The convex portion 5B of the movable contact 4 reverses the movable contact 4 and the vicinity of the vertex of the movable contact 4 comes into contact with the central fixed contact 3A, so that the switch is turned on. When the pressing force is removed, the movable contact 4 is movable by the restoring force of the movable contact 4. Contact 4
Is restored, the switch returns to the off state, and the push button 5 is pushed back to the original position.

[0011]

However, in the above-mentioned conventional push-on switch, there is a small gap between the tip of the claw portion 6C of the holding bracket 6 and the switch case 1, so that
By pressing the push button 5, the holding fitting 6 is pressed.
The swaged portion of the dowel 1A holding the switch case 1 and the switch case 1 loosened, and the entire switch case 1 may rattle back and forth. In particular, in a switch that performs switching with a short stroke, the operation feeling is poor due to the play. In some cases, contact became unstable.

Further, when the number of pressing operations increases, the dowel 1A
And the switch case 1 repeatedly hits the tip of the claw 6C of the holding fitting 6, the bending angle at the root of the claw 6C becomes tight, and the play becomes large.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an excellent lateral push type push-on switch which does not easily cause backlash during a pressing operation.

[0014]

In order to solve the above-mentioned problems, a push-on switch according to the present invention is provided with a locking tapered portion outside a rear bottom surface of a switch case, and a locking tapered portion of a holding bracket. The holding bracket and the switch case are firmly fixed by being cut into the portion and fixed.

According to the present invention, it is possible to provide an excellent push-on switch that does not easily cause backlash during operation.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The invention according to claim 1 of the present invention is directed to a resin-made box-shaped switch case having an opening on the front surface, a contact portion in the rear bottom surface, and a locking taper portion on the outside of the rear bottom surface. And the opening of the switch case is closed at the central front part of the U-shape viewed from the top, and the operation button for driving the contact part is projected from the through hole provided at the center of the front part, and from both sides of the switch case from the front part A claw bent toward the bottom surface of the switch case is provided at the rear end of both side surfaces having a mounting leg at a lower end extending rearward along the surface, and this claw bites into a locking taper portion of the switch case. It is a push-on switch consisting of a holding bracket that is fixed by attaching it, and the claw of the holding bracket is cut into the locking taper portion on the bottom of the switch case and fixed.
This has the effect that rattling between the holding bracket and the switch case hardly occurs during the pressing operation.

According to a second aspect of the present invention, in the first aspect of the present invention, a tongue piece is formed by performing a U-shaped shearing process connected to the rear side on both side surfaces of the holding bracket,
The front of the tongue is bent inward to form the claw of the holding bracket. By using the shearing method, a claw having a large external shape can be formed even within the same area, so that it can be easily formed into a small product. It has the effect of being applicable.

According to a third aspect of the present invention, in the first aspect of the invention, a tongue piece is formed by performing a U-shaped shearing process on a lower side of both sides of the holding bracket,
The upper portion of the tongue is bent inward to form the claw portion of the holding bracket. Since the claw portion is bent in a direction perpendicular to the pressing direction, the bending angle of the claw portion changes even if the number of pressing operations increases. Because it is difficult, the holding bracket and the switch case can be firmly fixed for a long period of time, and even if there is a slight difference between the front and rear dimensions of the switch case and the dimension from the front of the holding bracket to the claw, the bending angle of the claw should be adjusted. It has the effect that it can be firmly fixed by changing it.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the claw portion of the holding metal is formed to have a shape having a through hole at the center and projecting rearward on both side portions, and an inner side surface is provided outside the bottom surface of the switch case. Is provided with a convex portion that becomes a taper portion for locking, and bending the claw portion toward the switch case bottom side,
The holding bracket is fixed by making the end surface of the claw portion on the through hole side bite into the locking taper portion of the projection, and the switch case is held by the claw, so that the holding bracket and the switch case are It has the effect of being able to be firmly fixed and of reducing the thickness of the fixed part in the front-rear direction.

According to a fifth aspect of the present invention, in the first aspect of the present invention, the claw portion of the holding bracket is formed to have a trapezoidal shape in which the claw portions are projected rearward on both side surfaces and the rear side is widened, and the side surfaces are formed on the outside of the bottom surface of the switch case. A trapezoidal concave portion serving as a locking taper portion was provided, the claw portion was bent toward the bottom of the switch case, and the side end surface of the claw portion was cut into the locking taper portion of the concave portion to fix the holding bracket. Things,
Since the end surface of the claw portion can bite into the locking taper portion with a long dimension, it has an effect that the holding bracket and the switch case can be firmly fixed with short front-rear dimensions.

Hereinafter, embodiments of the present invention will be described with reference to FIGS.
The description will be given with reference to FIG. 6, and the same portions as those of the related art will be denoted by the same reference numerals and detailed description thereof will be omitted.

(Embodiment 1) FIG. 1 is a perspective view of a push-on switch according to a first embodiment of the present invention, FIG. 2 is a side view thereof, and FIG. 3 is a view in the direction of arrows AA in FIG. It is sectional drawing.

In FIG. 1, reference numeral 10 denotes a box-shaped switch case in which terminals 2 and 3 which are electrically connected to each other are fixed by insert molding so that the fixed contacts 2A and 3A are exposed to the outside and the center of the inner bottom surface. As in the prior art, a dome-shaped movable contact 4 and a push button 5 are included in front thereof.

Then, a holding bracket 11 having a U-shape in a top view is provided.
The four dowels 10 on the front of the switch case 10 cover the opening of the switch case 10 with the central front.
A is attached by caulking A, and the operating portion 5A of the push button 5 is
It protrudes forward from 1A.

A rear end extends from the front surface of the holding bracket 11 to the rear along both side surfaces of the switch case 10, and has a rear end connected to a rear end portion of both side surfaces having a wiring board mounting leg 11B at a lower end thereof. The claw portion 11C is formed by bending the front of a tongue piece formed by performing a U-shaped shearing process inward, and the tip of the claw portion 11C is provided on the inner side provided on the bottom rear surface of the switch case 10. The switch case 10 is fixed by biting into the tapered locking portion 10 </ b> B that becomes shallower as it becomes smaller.

In the push-on switch thus configured, in addition to the crimping of the dowel 10A in front of the switch case 10, the tip of the claw 11C behind the holding bracket 11 is connected to the tapered locking portion 10B of the switch case 10. Since it is biting, the mounting strength between the holding bracket 11 and the switch case 10 is greatly improved, and a push-on switch with little play during operation for a long time is obtained.

Further, since the claw portion 11C of the holding bracket 11 is formed by a shearing method, the outer shape of the claw portion 11C can be formed large even within the same area. The holding bracket 11 and the switch case 10 can be firmly fixed.

The method of attaching the lateral push type push-on switch to the printed wiring board and the operation thereof are the same as in the prior art, and therefore, the description is omitted.

The claw 11C of the holding fitting 11 may be bent before the holding fitting 11 and the switch case 10 are combined, or the same effect can be obtained by bending in the assembling process. Of course.

(Embodiment 2) FIG. 4 is a perspective view of a push-on switch according to a second embodiment of the present invention.
In the figure, reference numeral 12 denotes terminals 2 and 3 by insert molding.
And a tapered locking portion 12 that is deeper toward the upper side at the rear of the bottom surface.
A is provided.

Then, a dowel (not shown) in front of the switch case 12 is caulked, whereby a U-shaped holding bracket 13 is attached to the switch case 12 when viewed from above, and both sides of the holding bracket 13 are sheared. The front end surface of the claw portion 13A formed by a processing method and having the upper side inwardly bent inward bites into the tapered locking portion 12A of the switch case 12, thereby fixing the switch case 12.

When the holding bracket 13 and the switch case 12 are fixed in this manner, in addition to the effect described in the first embodiment, the claw portion 13A of the holding bracket 13 has a pressing operation force perpendicular to the bending direction. Therefore, the bending angle at the base of the claw portion 13A is unlikely to change due to the repeated operation, and the push-on switch has a good operational feeling with less play for a long period of time. Even if there is a slight difference in the dimension from the front surface of the metal fitting 13 to the claw 13A, the claw 13
By changing the bending angle of A, it can be firmly fixed.

(Embodiment 3) FIG. 5 is a perspective view of a push-on switch according to a third embodiment of the present invention.
In the figure, reference numeral 14 denotes terminals 2 and 3 by insert molding.
Is fixed, and a convex portion 14B having an inner wall portion serving as a tapered locking portion 14A is provided at the rear of the bottom surface.

The U-shaped holding bracket 15 is viewed from above.
However, a dowel (not shown) in front of the switch case 14 is attached by caulking, and a claw portion 15B having a holding hole 15A provided on a side surface portion of the holding bracket 15 is bent toward the bottom surface side of the switch case 14. Then, the inner end surface of the holding hole 15A bites into the tapered locking portion 14A of the inner wall of the projection 14B to fix the switch case 14.

When the switch case 14 is embraced by the claws 15B of the holding fitting 15, the holding fitting 15 and the switch case 14 can be more firmly fixed, and the fixed portion can be made thinner.

(Embodiment 4) FIG. 6 is a perspective view of a push-on switch according to a fourth embodiment of the present invention.
In the figure, reference numeral 16 denotes terminals 2 and 3 by insert molding.
Are fixed, and a trapezoidal concave portion 16B having a tapered locking portion 16A in the wall is provided at the rear of the bottom surface.

Then, a holding bracket 17 having a U-shape in a top view is provided.
However, the dowel (not shown) in front of the switch case 16 is attached by caulking, and the trapezoidal claw 17A provided on the side surface of the holding bracket 17 is attached to the switch case 16.
Is bent to the bottom surface side of the claw portion 17A,
The switch case 16 is fixed by biting into the tapered locking portion 16A of the concave portion 16B.

When the holding bracket 17 and the switch case 16 are fixed in this way, the claw portion 17A can bite into the tapered locking portion 16A with a long dimension, and can be firmly fixed with a short front and rear dimension.

[0039]

As described above, according to the present invention, the retainer and the switch case are fixed by making the claw of the retainer bite into the locking taper portion on the outside of the bottom surface of the switch case. It is possible to provide a high-quality push-on switch that is less likely to cause cracking and has a good operation feeling over a long period of time, and has a simple configuration that is easy to process continuously, so it is easy to automatically assemble and has high practical value. It is.

[Brief description of the drawings]

FIG. 1 is a perspective view of a push-on switch according to a first embodiment of the present invention.

FIG. 2 is a side view of the same.

FIG. 3 is a cross-sectional view taken along the line AA of FIG. 2;

FIG. 4 is a perspective view of a push-on switch according to a second embodiment of the present invention.

FIG. 5 is a perspective view of a push-on switch according to a third embodiment of the present invention.

FIG. 6 is a perspective view of a push-on switch according to a fourth embodiment of the present invention.

FIG. 7 is a side view of a conventional push-on switch.

FIG. 8 is a sectional view taken along the line AA in FIG. 7;

[Explanation of symbols]

 2, 3 terminal 2A, 3A Fixed contact 4 Movable contact 5 Push button 5A Operation part 10, 12, 14, 16 Switch case 10A Dowel 10B, 12A, 14A, 16A Tapered locking part 11, 13, 15, 17 Holding bracket 11A Through hole 11B Leg 11C, 13A, 15B, 17A Claw 14B Convex 15A Holding hole 16B Concave

Claims (5)

[Claims] 1. A box-shaped switch case made of resin having an opening on the front surface, a contact portion inside the rear bottom surface, and a taper portion for locking on the outside of the rear bottom surface, and a switch at a central front portion of a U-shape viewed from above. An operation button for driving the contact portion is protruded from a through hole provided in the center of the front portion, and an attachment leg is provided at a lower end extending rearward along both side surfaces of the switch case from the front portion. At the rear end of both side portions having a claw portion bent to the switch case bottom side,
A push-on switch made of a holding fitting fixed by making the claw portion bite into the locking taper portion of the switch case. 2. A tongue piece is formed on both sides of the holding bracket by performing a U-shaped shearing process connected to the rear side,
2. The push-on switch according to claim 1, wherein a front portion of the tongue is bent inward to form a claw portion of a holding bracket. 3. A tongue piece is formed on both side surfaces of the holding bracket by performing a U-shaped shearing process connected to the lower side,
2. The push-on switch according to claim 1, wherein an upper portion of the tongue is bent inward to form a claw portion of the holding bracket. 4. A claw portion of a holding bracket is formed to have a shape having a through hole in the center and projecting rearward on both side surfaces, and a convex portion having an inner side surface serving as a locking taper portion is provided on the outer side of the bottom surface of the switch case. Bend the switch case bottom side,
2. The push-on switch according to claim 1, wherein the holding bracket is fixed by making an end face of the claw portion on the side of the through hole bite into the locking taper portion of the projection. 5. A trapezoidal shape in which a claw portion of a holding metal is projected rearward on both side portions and a rear side is widened, and a trapezoidal concave portion having a side surface serving as a locking taper portion is provided on an outer bottom surface of the switch case. 2. The push-on switch according to claim 1, wherein the holding portion is fixed by bending the claw portion to the bottom side of the switch case and making the side end surface of the claw bite into the locking tapered portion of the concave portion.