JPH0342593Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention is applicable to switches, especially small push-type switches for position detection, which are installed on the mounting wall of a chassis, etc., or when multiple units are connected in a stacked manner. Regarding structure.

[Background of the idea]

Conventionally, in order to promote miniaturization of this type of switch, a structure has been developed in which a switch body is provided with a separate screw attachment part. The screw attachment part is integrally provided in a case member that is engaged with the wafer to form the switch casing, and is arranged adjacent to the wafer, and the screw insertion part is inserted through the screw attachment part. When a screw is inserted into a hole, the opening edge of the screw insertion hole will expand and deform due to the thin wall that accompanies miniaturization, and this expansion deformation may affect adjacent wafers. I become confused. In addition, to avoid this effect, the position of the contact mechanism within the wafer may be spaced apart, or
Although it is possible to make the wall thicker, these techniques run counter to the demand for smaller switches and would also increase costs.

[Purpose of invention]

The purpose of the present invention is to solve the problems of the conventional technology described above, and to provide a screw attachment part of a switch that is not affected by the expansion deformation of the screw insertion hole without changing the size of the switch body. The goal is to provide a structure for

[Summary of the idea]

To achieve this objective, the present invention comprises: a wafer with an opening at the top housing a switch mechanism; a case member engaged with the opening at the top of the wafer;
In this switch, the case member includes a screw fastening portion at a side end portion, and the width of the screw fastening portion is formed to be thicker than the engaging portion with the wafer. A slit-shaped gap is formed between the wafer and the wafer to absorb expansion and deformation of the screw insertion hole when the screw attachment part is attached with a screw.

[Example of idea]

Next, an example of implementation of the present invention will be described with reference to the drawings.

In the figure, reference numeral 1 indicates a push-type switch body in which the present invention is implemented. This switch body 1 has an open top surface and has a wafer 2 that accommodates a switch mechanism. A case member 3 is snap-in engaged with this wafer 2. A switch casing is formed.

Further, the case member 3 is integrally provided with a screw attachment part 5 in which a screw insertion hole 4 is bored, and a rotating lever 7 is attached to the upper surface of the screw attachment part 5 via a hinge part 6.
is provided, and the pivot lever 7 pushes the head of the slide 8 which projects outward from the switch casing. Furthermore, the screw fastening part 5
In this case, a snap-in engagement portion 9 of the case member 3 with the wafer 2 serves as a spacer, and a gap 10 is formed between the case member 3 and the wafer 2.

Furthermore, the rotating lever 7 is locked by a pair of hooks 11, 11 symmetrically provided on both sides of the case member 3, thereby suppressing the horizontal vibration of the rotating lever 7 and the repulsion caused by the hinge portion 6. .

A pin-shaped protrusion 12 is laterally protruded from a dead space approximately at the center of the bottom surface of the wafer 2, and a receiving groove 13 is formed linearly with the pin-shaped protrusion to allow the switch body 1 to overlap and connect to the mounting wall surface. Furthermore, a pin-like protrusion 14 protrudes from the rear surface of the wafer 2 in the opposite direction to the pin-like protrusion 12, and the pin-like protrusion 1
A protrusion 15 is formed above the diameter of the switch body 1 to enable overlapping connection of the switch body 1 and attachment to the mounting wall surface in the left and right direction.

At this point, attach the switch body to the mounting wall 1 of the chassis etc.
6, use pin-like protrusion 12 or 1
4 into the engagement hole of the mounting wall 16 to position it,
The screw 17 is inserted into the screw insertion hole 4 of the screw fixing part 5 and fixed. At this time, the screw insertion hole 4 expands and deforms into an elliptical shape, especially at its opening edge, but the size of the screw fixing part 5 increases due to this deformation, at a distance of 10 mm.
It is designed so that it is absorbed by the switch body 1 and has no effect on the switch body 1.

[Effect of idea]

As described above, according to the present invention, the influence of expansion deformation when a screw is inserted into the screw insertion hole is eliminated on the switch body, and the size of the switch body remains small and there is no need to change it. ing.

[Brief explanation of the drawing]

Figure 1 is a perspective view of a switch implementing the present invention.
Fig. 2 is a bottom view of the same, Fig. 3 is a perspective view of the same with the positioning of the overlapping connection, Fig. 4 is a partial plan view of the same with the same attached to the mounting wall, and Fig. 5 is a partial side view of the same. . 2... Wafer, 3... Case member, 4... Screw insertion hole, 5... Screw fixing part, 9... Snap-in engaging part, 10... Spacing, 17... Screw.

Claims (1)

[Scope of utility model registration request] A wafer with an opening on the top surface that accommodates a switch mechanism, a case member that is engaged with the opening on the top surface of this wafer, and a screw that is integrally provided at the side end of this case member and has a screw insertion hole. In the switch, the width of the screw attachment part is thicker than the engaging part with the wafer, and the screw attachment part and the wafer are provided with a screw attachment part. A structure of a screw fastening part of a switch, characterized in that a slit-like interval is formed to absorb expansion and deformation of the screw insertion hole when the fastening part is fastened with a screw.