JPS6213297Y2 - - Google Patents

Description

[Detailed description of the invention] The invention consists of a case made of elastic resin,
The present invention relates to a switch in which a cover plate such as a rigid terminal plate incorporated into the case is configured to be detachable.

Conventional switches of this type are shown in Figures 1 to 6.
It was configured as shown in the figure.

That is, an engaging protrusion 4 is provided on the central end face of both side walls of an elastic case 3 which slidably houses an operating body 2 holding a movable contact piece 1 therein, and the engaging protrusion 4 is engaged with the engaging protrusion 4. A rigid terminal plate 7 is connected to the opening of the case 3, and has a mating hole 5 and a plurality of fixed terminals 6 arranged and implanted therein, the conduction state of which can be switched by the movable contact piece 1. There is. In other words, engagement pieces 9 are provided in the intermediate portions on both sides of the terminal plate 7, and the engagement pieces 9 are formed by notches 8 on both sides, and the engagement pieces 9 slide on the tapered surfaces provided on the inner side of the engagement protrusions 4 of the case 3 to form the engagement holes 5. The case 3 and the terminal board 7 were connected by being stuck in the case.

The distance between the tips of the engaging protrusions 4 is dimension A, and the base part is dimension B, and a tapered surface is formed so that A>B. The dimension between the engaging pieces 9 of the terminal plate 7 is dimension A. It is becoming.

With such a dimensional configuration, the elasticity of the case 3 pushes the engagement protrusion 4 outward and slides it in to connect the terminal board 7. However, when installing the terminal board 7,
If the positioning of the case 3 and the terminal plate 7 is not ensured, the engagement piece 9 of the terminal plate 7 will not fit into the engagement hole 5 of the engagement protrusion 4, and the If the case 3 is tilted as shown in Figure 5 and requires a lot of effort to assemble, or if the engagement piece 9 does not completely fit into the engagement hole 5, the case 3 may be tilted outward as shown in Figure 6. It had drawbacks such as remaining swollen and becoming a defective product.

The present invention eliminates the above-mentioned drawbacks of the prior art.

Embodiments of the present invention will be described below with reference to FIGS. 7 to 13.

First, in FIGS. 7 to 9, 10 is a case molded from an elastic synthetic resin, and engagement protrusions 11 are formed on both sides of the opening surface of the case 10 and on the upper part of the rear end. ing. A guide groove 12 is provided at the center of the inner surface of the engaging protrusion 11. The guide groove 12 is wide at the upper part and narrower at the lower part, and has a tapered part at the lower part of the vertical part. is provided. This engagement hole 13 communicates with a vertical groove 14 provided in the outer surface of the case 10 in the height direction. Further, a notch 15 is formed in the front end wall of the case 10, and an operating shaft 17 of an operating body 16 housed in the case 10 is fitted into the notch 15.

The operating body 16 is formed with a sliding groove 18 and a recess 20 in the middle of the sliding groove 18 into which a clip-shaped movable contact piece 19 is fitted.

Moreover, a coil spring 21 is fitted into the operating shaft 17 protruding from the case 10 of the operating body 16, and a stopper 2 is attached to the tip of the operating shaft 17.
2 and the front end wall of the case 10, and the operating body 1
It works for sliding return of No. 6.

This case 10 has a plurality of fixed terminals 2.
Terminal board 24 having No. 3 implanted thereon is connected. This terminal board 24 is composed of a highly rigid insulating plate,
Furthermore, an engaging piece 26 having notches 25 on both sides is provided at a position corresponding to the engaging protrusion 11 of the case 10. The engaging piece 26 is dimensioned to fit into the engaging hole 13 of the engaging protrusion 11 .

Furthermore, as shown in FIGS. 10 to 12, the operation body 16 holding the movable contact piece 19 is assembled into the case 10, and then the engagement piece 26 of the terminal plate 24 is made to correspond to the engagement protrusion 11. , the engaging protrusion 11 of the terminal plate 24
, and press the terminal plate 24 to fit the engagement piece 26 into the engagement hole 13 .

The dimensions of this engaging piece 26 are determined so that it fits into the upper part of the guide groove 12 with sufficient margin, and the engaging piece 26
presses this tapered portion, pushes it outward, and fits into the engagement hole 13. That is, the engagement piece 26 is guided by the guide groove 12 and correctly guided into the engagement hole 13. Case 10 of this terminal board 24
The fixed terminal 23 fits into the sliding groove 18 of the operating body 16 by being connected to the operating body 16 .

The guide groove 12 can also have the same function as shown in FIG. 13 by making the entire portion tapered, making the tip wider and the engagement hole 13 side narrower. Furthermore, as shown in FIG. 14, a fixed terminal 23 may be implanted in the bottom of the case 10, and a cover 27 may be used instead of the terminal board 24.

Further, by pressing the engaging protrusion 11 outward, the engaging piece 26 can be pulled out from the engaging hole 13 and the terminal plate 24 can be removed from the case 10.

Since the switch of the present invention is constructed as described above, the cover plate such as the terminal plate can be reliably connected to the opening surface of the case using the guide groove of the engaging protrusion, which significantly improves the workability of assembly. Since the cover body such as the terminal board does not tilt during assembly, there is no possibility that the contact state becomes unstable when the movable contact piece is deformed by the fixed terminal and the finished product is made, resulting in a significant improvement in quality. Improvement can be measured.

Moreover, by being able to measure the workability of assembly, the assembly process can be shortened, costs can be reduced, and the yield of the product can be significantly improved, which is of great practical value.

[Brief explanation of drawings]

Figure 1 is a perspective view of a conventional switch, Figure 2 is a perspective view of the switch case, Figure 3 is a top view of the terminal board, and Figure 4 is an explanatory diagram showing the dimensional relationship between the case and the terminal board. , Figure 5 is a sectional view when assembled, Figure 6 is a cross-sectional view of the same assembly.
The figure is a top view of the same inconvenient state, FIG. 7 is a perspective view showing one embodiment of the switch of the present invention, FIG. 8 is an exploded perspective view of the same, and FIG. 9 is an enlarged perspective view of the engaging projection of the same case. Figures 10 to 12 are cross-sectional views of one step during assembly, Figure 13 is a perspective view of the engaging protrusion of another embodiment, and Figure 14 is a perspective view of another embodiment. be. 10... Case, 11... Engaging protrusion, 12...
Guide groove, 13... Engagement hole, 16... Operating body, 1
9... Movable contact piece, 23... Fixed terminal, 24... Terminal plate, 25... Notch, 26... Engaging piece, 27...
…cover.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An operating body holding a movable contact piece for switching conduction between a plurality of fixed terminals is housed in a case made of elastic synthetic resin, and an engagement hole is provided at the open end of the case. A plurality of engaging protrusions having the above-mentioned engagement protrusions are provided at the upper end of different wall surfaces, and a lid body having an engagement piece that is highly rigid and fits into the above-mentioned engagement hole is coupled to the opening of the case, and the above-mentioned engagement protrusions A guide groove having an inclined part with a vertical part is provided at a part of the tip of the inner surface of the case, an engagement hole is provided at the lower end of the guide groove, and the tip of the guide groove of the engagement protrusion of the case is provided with an engagement hole. A switch that is fitted with a lid that has an engaging piece. (2) The switch according to claim 1, wherein the guide groove of the engaging protrusion is configured to be wider toward the tip.