JP3738467B2 - switch - Google Patents

Description

[0001]
[Industrial application fields]
The present invention mainly relates to various operation switches mounted in an automobile interior.
[0002]
[Prior art]
A conventional switch of this type will be described with reference to FIGS.
[0003]
In the figure, reference numeral 21 denotes a sliding body which is slidably held by an inner case 22 and is always urged toward the original position by a return spring 23 and is equipped with an operation portion 24. Reference numeral 25 denotes a cam that is rotatably supported by the support portion 26 of the inner case 22 by a snap-fit type mounting structure, and is further biased to the inner case inner side by a winding spring 27, and is a pin inserted into the sliding body 21 28 forms a push-lock mechanism means of the switch.
[0004]
Reference numeral 29 denotes a terminal plate which is insert-molded with the terminal 30 to form a circuit and is held on the support portion 31 of the inner case 22 by a snap-fit mounting structure, and a contact piece 32 mounted on the sliding body 21. The circuit contact means is configured to open and close the circuit. Reference numeral 33 denotes an outer case provided with a claw portion for locking so as to be mounted in the automobile compartment, and an inner case 22 mounted with each component is held inside.
[0005]
[Problems to be solved by the invention]
However, in the switch having the above-described conventional configuration, the support portion 26 of the cam 25 and the support portion 31 of the terminal plate 29 provided on the inner case 22 use an elastic deformation region of resin so that a snap fit is possible. As shown in FIG. 6 showing the CC cross section of FIG. 5 and FIG. 7 showing the DD cross section, the holding portions of the outer case 33 and the inner case 22 are formed at the time of molding. In consideration of the dimensional variation due to the influence of the influence, the guide portion 34 having a small fitting area is used for holding, and the other portions are intentionally provided with a gap between the inner wall surface of the outer case 33 and the outer wall surface of the inner case 22. It was. Therefore, the amount of application between the supporting part and the supported part due to deformation during assembly in an adverse environment, deformation during assembly due to abnormal handling, shape change due to variations in molding conditions, instantaneous deformation due to external impact, etc. There was a risk that the parts could not be held and could fall out.
[0006]
The present invention solves such a conventional problem, and an object of the present invention is to provide an excellent switch capable of preventing each holding component from falling off.
[0007]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a protrusion on the outer side of the front end of the support portion of the snap-type mounting structure provided on the inner case, and the outer surface dimension of the protrusion is substantially the same as the inner wall surface dimension of the outer case. It is comprised so that it may become a fitting dimension of a dimension.
[0008]
[Action]
Therefore, according to the present invention, the protrusion is provided on the substantially outer side of the tip of the support portion of the snap-type mounting structure, and the outer surface dimension of the protrusion is set to the fitting dimension substantially the same as the inner wall surface dimension of the outer case. Since the inner wall surface of the outer case and the outer surface of the protrusion of the support portion are always in contact with a deformation due to a change in shape or an external impact, the deformation is restricted and the base position state can be maintained.
[0009]
In addition, even when deformation is caused by abnormal handling, if the deformation is to some extent, the deformation is corrected after the assembly, and the holding parts can be prevented from falling off.
[0010]
【Example】
A switch according to an embodiment of the present invention will be described below with reference to FIGS.
[0011]
In the figure, reference numeral 1 denotes a sliding body which is slidably held on the inner case 2 and is always urged toward the original position by a return spring 3 and is equipped with an operation portion 4. Reference numeral 5 denotes a support portion which is provided in the inner case 2 and holds the cam 7 urged to the inside of the inner case by the winding spring 6 so as to be rotatable by a snap-fit type mounting structure. A protrusion 5a is provided at the tip.
[0012]
Reference numeral 8 denotes a pin inserted into the sliding body 1, and the winding spring 6 and the cam 7 form a push lock mechanism means of the switch. Reference numeral 9 denotes a support portion which is provided in the inner case 2 and holds a terminal plate 11 which is formed by insert molding of the terminal 10 to form a circuit by a snap-fit type mounting structure. A protrusion 9a is provided. Reference numeral 12 denotes a contact piece held by the sliding body 1 and constitutes circuit contact means so that the circuit can be opened and closed with the terminal board 11. Reference numeral 13 denotes an outer case provided with a locking claw portion so as to be mounted in the automobile compartment, and holds an inner case 2 mounted with each component on the inner side.
[0013]
Further, as shown in FIG. 2 showing the AA cross section of FIG. 1 above, the outer surface dimension of the projection 5a of the support portion 5 supporting the cam 7 and the inner wall surface dimension of the outer case 13 are substantially the same size. Further, as shown in FIG. 3 showing the BB cross section of FIG. 1, the outer surface dimension of the protrusion 9 a of the support portion 9 that supports the terminal plate 11 and the inner case 13. The wall surface dimensions are incorporated as substantially the same fitting dimensions.
[0014]
FIG. 4 shows another embodiment, in which a crushing rib 14 having a dimension slightly larger than the inner wall surface dimension of the outer case 13 is further provided on the protrusion 9a of the support portion 9 with respect to the above-described embodiment. . In this case, since the width dimension of the crushing rib 14 is larger than the inner wall surface dimension of the outer case 13, it is assembled in a press-fit state at the time of assembly, and is always in contact.
[0015]
In addition, although the example which provided the crushing rib 14 in the processus | protrusion 9a of the support part 9 was demonstrated in FIG. 4, it cannot be overemphasized that the effect increases further by providing the same crushing rib 14 in the processus | protrusion 5a of the support part 5. FIG. Yes.
[0016]
【The invention's effect】
As is clear from the above embodiment, the cam and the terminal board held by the snap-fit mounting structure on the inner case are substantially the same as the outer surface dimensions of the protrusions of the support portions and the inner wall surface dimensions of the outer case. Because it is configured to be assembled with the fitting dimensions of the dimensions, deformation of each support part is regulated, deformation due to temporal change, external impact, deformation at the time of assembly due to abnormal handling, etc. are prevented, and the mounted parts are securely It has the effect of being retained.
[0017]
Further, by adding a crushing rib to each protrusion and making the width dimension larger than the inner wall surface dimension of the outer case, the support portion is always brought into contact with the inner wall, and a further deformation preventing effect can be obtained.
[Brief description of the drawings]
1 is an exploded perspective view showing a configuration of a switch according to an embodiment of the present invention. FIG. 2 is a cross-sectional view taken along line AA in FIG. 1. FIG. 3 is a cross-sectional view taken along line BB in FIG. FIG. 5 is a sectional view showing another embodiment of the present invention. FIG. 5 is an exploded sectional view showing the structure of a conventional switch. FIG. 6 is a sectional view taken along the line CC in FIG. DD sectional view of FIG. 5 [Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Slide body 2 Inner case 3 Return spring 4 Operation part 5 Support part 5a Protrusion 6 Winding spring 7 Cam 8 Pin 9 Support part 9a Protrusion 10 Terminal 11 Terminal board 12 Contact piece 13 Outer case 14 Crushing rib

Claims (2)

An inner case in which an operation member having a contact is slidably held, a terminal plate and a cam member corresponding to the operation member are provided by a snap-type mounting structure, and an outer case in which the inner case is mounted is provided. A switch in which a protrusion corresponding to the inner wall surface dimension of the outer case is provided on the outer side of the front end of the support portion of the snap-type mounting structure, and the outer surface dimension and the outer case inner wall surface dimension are substantially the same. 2. The switch according to claim 1, wherein a rib having a dimension such that the outer diameter dimension is larger than the inner wall surface dimension of the outer case is provided on a protrusion provided substantially outside the tip of the support portion of the snap-type mounting structure.

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