JPH0451381Y2 - - Google Patents

Description

[Detailed description of the invention] (Field of industrial application) The present invention prevents water from entering the switch part through the gap between the push piece and the push button switch body in a push button switch such as a switch with a built-in illumination part. This relates to the waterproof structure of push button switches to prevent this.

(Prior Art) Various types of waterproof structures for push button switches have been proposed.

For example, a structure in which waterproofing is provided between the pusher piece and the switch body using an O-ring or the like, or a technique described in Japanese Utility Model Application Publication No. 123831/1988 is known.

The O-ring type has a structure in which, for example, the O-ring is attached to an O-ring groove provided in a pusher piece to seal it.
On the other hand, the technique described in the above-mentioned Japanese Utility Model Publication No. 123831/1983 has a structure in which a rubber cap is fitted onto the ring itself and brought into close contact with the inner circumferential surface of the main body case.

(Problems to be Solved by the Invention) The present invention provides a waterproof structure for a push button switch that can be easily and reliably installed to fix the outer periphery of the seal gasket to the box body and is completely waterproof. It is in.

(Means for Solving the Problems) The present invention provides a waterproof structure for a push button switch in which a push button switch main body 1 and a push button main body 2 that protrudes from an upper opening 7 of the push button switch body 2 and can move forward and backward are waterproofed via a waterproof gasket 3. , a waterproof gasket 3 is provided with a plurality of bar-shaped protrusions 5 in the vertical direction on the upper peripheral wall of a shelf 4 provided around the inner periphery of the push button switch body 1, and is tightly fixed on the inside to the push button body 2. The outer peripheral end of the waterproof gasket 3 is placed on the shelf 4, and the upper surface of the outer peripheral part of the waterproof gasket 3 is pressed against the upper surface of the shelf 4 by a metal ring 6 whose outer periphery is engaged and fixed to the protrusion 5 to make it waterproof. It has a waterproof structure with a push button switch.

Note that the protrusions 5 may be arranged to completely fix the metal ring 6, and the arrangement thereof is not limited to those arranged at equal intervals, but may be arranged by changing the arrangement pitch, for example, two or more protrusions 5 may be arranged close together as a set. It is also possible to arrange these sets at equal intervals.

(Function) The present invention is constructed as described above, and after the outer periphery of the waterproof gasket 3 fixed to the push piece main body 2 is placed on the shelf 4, the metal ring 6 is pushed into the shelf 4 from above. . At this time, the metal ring 6 engages while crushing the protrusion 5 formed around the shelf 4, and the lower outer circumference of the waterproof gasket 3 is pressed and fixed against the upper surface of the shelf 4, achieving higher sealing performance. It works like this.

(Example) An embodiment of the present invention will be described in detail below.

A push-button switch body 1 having a built-in micro switch etc. is provided with a push-piece body 2 which protrudes from an upper opening 7 and is movable forward and backward.

The push piece main body 2 has an illuminated display section 8 at the upper part and a connecting section 9 at the lower part, and has a built-in illuminating unit 12 such as a light emitting diode.

Further, the push piece main body 2 can be moved up and down by a spring 11 provided at the lower part via a connecting cylinder 10 which is detachable.

The inner end of the waterproof gasket 3 is tightly fixed by the push piece main body 2 and the connecting cylinder 10. Its outer periphery is a shelf portion 4 provided around the inner surface of the push button switch body 1.
It is placed on. On the upper peripheral wall of this shelf section 4,
A plurality of protrusions 5 are provided in a rod shape in the vertical direction.
The metal ring 6 is pushed in while slightly crushing the head of the protrusion 5, and the waterproof gasket 3 is crimped and fixed to the shelf 4.

13 in the figure is the illumination unit 12 and external terminal 14
It is a coil spring that connects.

As shown in FIG. 2, the assembly is performed by attaching the spring 11 and the connecting cylinder 10 through the upper opening 7 of the push button switch body 1, and then inserting the waterproof gasket 3 (FIG. 5). Next, the metal ring 6 is inserted from above the shelf 4 using, for example, an air press or by hand. At this time, the metal ring 6 is inserted and fixed so as to crush the head of the projection 5, and the outer circumferential upper surface of the waterproof gasket 3 is fixed by pressure. (Figures 6 and 7).

When the push piece main body 2 is inserted in this state, the locking protrusion 15 formed on the connection cylinder 10 engages with the locking part 16 of the push piece main body 2, and the push piece main body 2 and the connection cylinder 10 are engaged with each other. becomes integral, and at this time waterproof packing 3
(Figure 8).

Here, FIG. 8 shows a diagram in which the illumination unit 12 is omitted.

In addition to being made flat, the shelf portion 4 may be formed with a convex shape in the circumferential direction, as shown in FIGS. 5 to 8, in order to improve waterproofness. Furthermore, the structure for connecting the waterproof gasket 3 to the push piece main body 2 is not limited to the above-mentioned embodiment.

That is, even if the waterproof packing 3 is formed into a ring shape, the push piece main body 2 is inserted into the inner opening, and the waterproof packing 3 and the push piece main body 2 are tightly fixed by the elastic force of the waterproof packing 3. good.

(Effects of the invention) As mentioned above, in this invention, the waterproof gasket and the push button switch body are fixed by pushing one metal ring so as to crush the protrusion, and the metal ring is inserted into the protrusion. Because it is installed,
The waterproof gasket does not easily separate from the push button switch body.

Furthermore, the structure of the present invention is simple and can be manufactured at low cost, and has excellent effects.

[Brief explanation of drawings]

The drawings show one embodiment of the present invention; Fig. 1 is a sectional view of the main part of the invention, Fig. 2 is an exploded perspective view of the same, Fig. 3 is a plan view of the push button switch body, and Fig. 4 5 is a plan view of the mounting body, and FIGS. 5 to 8 are sectional views showing the assembled state. 1 is a push button switch body, 2 is a push piece body, 3 is a waterproof gasket, 4 is a shelf, 5 is a protrusion, 6 is a metal ring, 7 is an opening, 8 is an illuminated display part, 9 is a connection part, 10 is a Connection cylinder, 11 is a spring, 12 is a lighting unit, 13 is a coil spring, 14
15 is an external terminal, 15 is a locking protrusion, and 16 is a locking portion.

Claims (1)

[Scope of utility model registration request] In the waterproof structure of the push button switch, in which the push button switch body and the push piece body that protrudes from the upper opening of the push button switch body and can move forward and backward are waterproofed through a waterproof packing, the upper circumferential wall of the shelf provided around the inner periphery of the push button switch body is The outer circumferential end of the waterproof gasket, which has a plurality of longitudinally formed bar-shaped protrusions and is tightly fixed on the inside to the pusher piece body, is placed on the shelf, and the outer circumference is engaged and fixed to the protrusions. The waterproof structure of the push button switch is characterized in that the upper surface of the outer periphery of the waterproof gasket is pressed against the upper surface of the shelf using a metal ring to make it waterproof.