JPS6355824A - Push button switch - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] 〔Technical field〕 This invention relates to a push button switch.

[Background technology]

A push-button switch usually includes a case body that houses a contact opening/closing mechanism and an exterior cover placed over the case body, and the contacts are generally opened and closed by pressing the exterior cover surface.

By the way, in the past, the contact opening/closing mechanism was covered only by the exterior cover, and moreover, as seen in the model of the seesaw type operator as an operating means, the conventional operator was formed on the exterior cover. Projects outward through the opening. In this structure, there is a gap between the opening of the exterior cover and the operator, and this gap directly communicates through the internal space of the exterior cover to a location where the contact opening/closing mechanism is located. Normally, this type of push button switch does not cause any problems, but if it is installed in a place near water such as a bathroom or kitchen, water sprinkled during use or moisture after use may enter through the gap. This poses a problem in that it affects the contact opening/closing mechanism, often leading to functional deterioration such as poor contact.

[Purpose of the invention]

In view of the above circumstances, the present invention uniquely ensures the waterproofness of the contact opening/closing mechanism inside the exterior cover.
To provide a push button switch which can effectively prevent the deterioration of the switch function and can easily match the color tone of an exterior cover serving as the outer surface to the color tone of other members during on-site construction.

[Disclosure of the Invention] In order to achieve the above object, the present invention includes a case body and an exterior cover that house a contact opening/closing mechanism, and the contact opening/closing mechanism is turned ON/OFF by pressing the case body. In the push button switch, a flexible inner cover is attached to the case body so that the contact opening/closing mechanism is hermetically housed, and the flexible inner cover is located inside the outer cover. The present invention will be described in detail below with reference to the drawings showing embodiments thereof.

FIG. 1 shows a cross section of an example of a push button switch according to the present invention. This pushbutton switch includes a case body 1 that houses a contact opening/closing mechanism. The state of the case body 1 seen diagonally from above with other parts assembled is shown in the second article, and the case body 1 seen diagonally from above is shown in the second article, which is almost a single item except for most of the switches and other parts. The situation is shown in Figure 3. As shown in these figures, the case body l is molded using a resin material and includes as its main parts a square base plate part 2 and a boss part 3 that projects downward from the center as a square tube. . A housing recess 4 is formed in the center of the base plate 2 and has a rectangular opening when viewed from above. The housing recess 4 is formed so that the protruding portion of the boss portion 3 is partitioned by a partition wall 5 in the middle, and is open upward.

Engagement ridges 6 having a semicircular cross section are provided on all sides in a portion of the base plate 2 that corresponds to the outer periphery of the accommodation recess 4, and the outer periphery of the engagement ridge 6 is disposed on all sides. The sealing protrusion 7 is provided so as to surround it in a quadrilateral shape when viewed from above. An engagement groove 8 is provided on the inner periphery of this sealing protrusion 7.
is provided.

A flexible inner cover 10 made of rubber or a special soft vinyl chloride resin material is installed in the center of the base plate 2 so as to be concentric with the accommodation recess 4 . The inner cover 10 has a central raised flexible section 11 and a sealing flange section 12 around its outer periphery. The flexible portion 11 is provided with a recessed portion 13 corresponding to the upper side of the housing recess 4 in its protruding interior, and these recessed portions 13 and the housing recess 4 form one sealed space. . On the back surface of the sealing flange portion 12, there is an engagement groove 1 that engages with the engagement protrusion 6 from above.
4 is formed, and at the outermost periphery of the sealing flange portion 12, an engaging protrusion 15 that engages in the engaging groove 8 is formed.
is formed. The upper surface of the sealing flange portion 12 is pressed by a presser plate 17 so that it is at the same height as the upper surface of the sealing protrusion 7 of the base plate 2, and this presser plate 17 and the sealing protrusion 7 are bonded with adhesive. They are fixed by bonding or by ultrasonic heat bonding method. As a result, the space between the base plate portion 2 and the flexible portion 11 is sealed, and the switch body (contact opening/closing mechanism) 20 is housed in this sealed space. This switch body 20 is a microgap switch, and is installed on a printed board 23 installed in the housing recess 4.

The actuator 21 protruding from the switch body 20 is close to the back surface of the flexible portion 11, and the printed board 23 has two actuators electrically connected to the switch body 20, as shown in FIG. The lead terminal of the main wiring 24 is connected. The wires 24 are led to the outside through wire insertion holes 25 formed in the partition wall 5, and are connected to, for example, a notification device (not shown). An embedded recess 26 is formed at a location of the boss portion 3 corresponding to the outside of the partition wall 5, and an adhesive 27 is embedded in this embedded recess 26. This adhesive 2
7 completely prevents moisture from entering from the mounting box (not shown) side.

On the other hand, the upper wall of the case body 1 has a pair of spring receiving holes 30, a handle stopper 31 arranged at four points,
A cover engaging protrusion 32 is provided so as to be placed back to back with this stopper 31. Said spring receiving hole 3
0 is provided with a return spring 33, respectively. A handle 35 is placed on top of these return springs 33, and this handle 35 is pushed down against the return spring 33 and returned by the return spring 33 to the hand stopper 3.
1. Due to this reciprocating movement of the handle 35, the holding protrusion 36 protruding from the center of the back surface of the handle 35 presses down the actuator 21 via the flexible portion 11, turning the switch body 20 ON-OFF.
It is set to work. Note that the handle 35
A handle stopper 31 is attached to the locking step 37 at the corner of the
is engaged.

A body peripheral edge projection 39 having an inverted U-shaped cross section is formed on the outer peripheral edge of the case body 1.
A waterproof gasket 40 and an exterior cover 41 are fitted and attached via.

The waterproof gasket 40 is formed into a four-sided frame shape using a special soft vinyl chloride resin material or a rubber material, and a fitting protrusion 42 protruding from the top surface is formed on the back side of the body peripheral protrusion 39. Formed intrusive light: a
I'm stuck in 43. The waterproof gasket 40 is provided with a groove 44 on its back surface so that it can effectively adhere to the surface of construction materials such as bathrooms. In addition, the case body
A mounting frame 45 for a single opening provided on the back side of the box is screwed onto the front surface of the mounting box. The waterproof packing 40 is made to come into close contact with the construction material.

As shown in FIG. 5, the exterior cover 41 has an opening 47 in the center and a rectangular contact step 48 on its outer periphery. An operating sheet 49 made of a special soft vinyl chloride resin material is attached to the contact step portion 48 by adhesion (or welding). When the operating sheet 49 is pressed, the flexible portion 11 is pushed down via the handle 35, and when the operating sheet 49 is returned, the handle 35 returns to its original position.

This causes the switch body 20 to perform an ON-OFF operation. The exterior cover 41 is fitted onto the outer periphery of the case body 1 and also engages with the cover engagement protrusion 32, so that the exterior cover 41
It is said to be removable and to seal the internal space to the outside as well. Note that the lower edge of the exterior cover 41 is in close contact with not only the case body l but also the upper surface of the waterproof gasket 40. However, if the space between the decorative cover and the inner cover is not completely sealed and a push button switch is installed, a hole is provided at the bottom of the decorative cover so that any water that has entered can come out through this hole. Good too.

As mentioned above, since the switch body 20, which is a contact opening/closing mechanism, is built into the space sealed by the case body 1 and the internal cover 10, there is no chance of water spray or moisture entering the switch body 20. It is something.

In particular, if the operation sheet 49 is attached to the exterior cover 41 and is provided externally as in the embodiment described above, the intrusion of water and the like can be more effectively prevented. In this way, the waterproofness of the switch body 20 is independently ensured internally, so that the exterior cover 41 can be detached and replaced, as seen in the embodiments described above. This makes it possible, for example, to freely match the color tone of the exterior cover 4.1 to the color tone of existing tiles in the bathroom on site.

Note that, instead of the operation sheet being operated by pushing, it may be replaced by a type in which the seesaw type operator is operated by pushing. The handle is not necessarily a necessary part. Further, the switch body may be of a reversible type. Furthermore, the inner cover can be made of a rubber material, and the presser plate can be attached by adhesive. [Effects of the Invention] Since the push button switch according to the present invention has the above-described configuration, By uniquely ensuring the waterproofness of the contact opening/closing mechanism inside the exterior cover, deterioration of the switch function is effectively prevented, while the external exterior cover is removable and replaceable, making it easier to install on-site. It is now possible to freely match the color tone with other parts.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view showing an example of the structure of a push-button switch according to the present invention, FIG. 2 is a perspective view showing the internal structure with the handle and exterior cover disassembled, and FIG. 3 is a perspective view of the handle. Figure 4 is an exploded perspective view showing the switch body, wiring, and printed circuit board installation relationship. Figure 5 is an exploded perspective view of the parts excluding the exterior cover.
FIG. 3 is an exploded perspective view showing the attachment relationship between the exterior cover and the operation sheet. 1...Case body 10...Inner cover 20...
・Switch body (contact opening/closing mechanism) 41...Exterior cover agent Takehiko Matsumoto ?!Relationship with the case of those who make corrections Patent application colonel Address 1048 Oaza Kadoma, Kadoma City, Osaka Name (583) Representative of Matsushita Electric Works Co., Ltd. f1m role Sadao Fujii 4, agent 6, subject of ?i correction Specification and drawing 7, contents of amendment■ On page 4 of the specification, line 18 and line 19 of the same page,
In each case, the words "engaging protrusion 6" are corrected to "protrusion 6." ■ In lines 13 to 14 of page 5 of the specification, "the engagement groove 14J that engages with the engagement protrusion 6 from above" is replaced with "the engagement groove 14J that engages with the engagement protrusion 6 from above".
(In the figure, it is pushed into the protrusion 6 and is depressed) 14.'' ■ On page 8, line 19 of the specification, the phrase "special soft vinyl chloride resin material" has been corrected to read "polycarbonate resin film." ■ Page 11, lines 13 to 20 of the specification states, ``Furthermore, the inner cover may be made of a rubber material, and the presser plate may be made of a rubber material.
It can be attached by adhesive. ” will be deleted. ■ On page 11, line 13 of the specification, the phrase "and exterior cover" is corrected to "return spring and exterior cover." ■ On page 11, line 14 of the specification, it says "handle",
"Handle, return spring," I corrected. ■ Figure 5 of the attached drawings has been corrected as shown in the attached sheet.

Claims (1)

[Claims] (1) In a push button switch that is equipped with a case body that houses a contact opening/closing mechanism and an exterior cover, and is configured to turn on/off the contact opening/closing mechanism by pressing the switch, the switch is located inside the exterior cover. and a flexible inner cover is attached to the case body so that the contact opening/closing mechanism is hermetically housed, and the outer cover is detachably attached to the case body. Features a push button switch.