JP2555042B2 - Push button switch - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a waterproof push button switch.

BACKGROUND ART Conventionally, the opening / closing operation portion of this type of push button switch has a structure as shown in FIG. That is, the switch main body 52, which is a contact opening / closing mechanism, is arranged on the upper surface of the bottom of the case body 51, and the switch main body 52 is covered with the cover 53 for waterproofing. This cover 53 is flexible, and a handle is provided above the cover 53 via a spring 55.
54 is arranged so as to be vertically movable and biased upward. An outer cover 56 is attached to the upper surface of the case body 51 so as to cover the cover 53. Then, the handle 54 is exposed from the opening of the exterior cover 56, and is pushed downward by the pushing operation of the handle 54 against the biasing force of the spring 55. Press the cover 53 of the
By pressing, the contacts of the switch main body 52 are driven on and off. In such a conventional example, since the handle 54 urged by the spring 55 is used for the opening / closing operation, a structure for supporting the handle 54 is required and the spring
There was a problem that a large number of parts such as 55 were required.

As another conventional example, in Japanese Utility Model Publication No. 36-31038, the peripheral edge groove of the elastic cover holds the peripheral edge of the central hole of the switch box from above and below, and the elastic cover is pushed with a finger to open / close the contacts of the switch. However, in this conventional example, since the peripheral edge groove of the elastic cover is merely holding the peripheral edge of the central hole of the switch box from above and below, the elastic cover is pressed with a finger. There is a risk that lateral displacement will occur at the peripheral edge of the elastic cover. In other words, since the elastic cover is pushed by a finger from various directions, lateral displacement is likely to occur. For example, when the elastic cover laterally deviates to one end side in the lateral direction, the holding portion on one end side is long and the one on the other end side. The sandwiching part becomes shorter, and the waterproofness is reduced at the part where the sandwiching part is shortened, and the watertightness is impaired, and the initial waterproof state (the sealing flange part of the cover is biased between the holding plate and the case body). However, there is a problem that rainwater enters the contact opening / closing mechanism due to the lateral displacement of the elastic cover.

As still another conventional example, Japanese Utility Model Laid-Open No. 58-98725 discloses a flexible soft cover in which a peripheral seal portion is sandwiched between a base and a groove on the upper surface of a container from above and below to provide a flexible soft cover. A configuration is disclosed in which the cover is pressed with a finger to open / close the contact of the switch. However, in this conventional example as well, the peripheral seal portion of the flexible flexible cover is simply used as the base and the groove on the upper surface of the container. Since it is only sandwiched from above and below, there is a possibility that lateral displacement may occur at the peripheral edge of the elastic cover when the elastic cover is pressed with a finger. That is, since the elastic cover is pushed by the finger from various directions, lateral deviation easily occurs, and for the same reason as in the conventional example, there is a problem that rainwater enters the contact opening / closing mechanism due to lateral deviation of the flexible soft cover. is there.

[Object of the Invention] The present invention has been provided in view of the above points,
The number of parts is reduced to simplify the assembly process, the sealing flange is prevented from slipping sideways when the cover is pushed, and the initial watertight state is maintained for a long period of time to prevent water from entering the contact opening / closing mechanism side. The present invention provides a push button switch for the purpose of preventing the intrusion of the push button.

DISCLOSURE OF THE INVENTION (Structure) The present invention relates to a case body that accommodates a contact opening / closing mechanism in which contacts are turned on / off by a push operation, a cover that covers the contact opening / closing mechanism and is waterproofly fitted to the case body, and a cover. Has a pressing plate that presses the closed flange portion provided on the outer periphery of the case body toward the outer peripheral upper surface of the case body, and the projections located in four directions on the outer peripheral upper surface of the case body, and the engagement members located on the outer peripheral side of the projections. The cover is formed with an elastic material, and the cover is formed on the lower surface of the sealing flange portion of the cover while the sealing flange portion of the cover is pressed toward the outer peripheral upper surface of the case body by the pressing plate. A cover is provided with a contact opening / closing mechanism, which is provided with a protrusion that is pressed into the protrusion of the case body and is recessed, and an engagement protrusion that is located on the outer peripheral side of the protrusion and that engages in the engagement groove of the case body. To It is characterized in that also serves as a handle to manipulate. With this configuration, it is possible to push the contact opening / closing mechanism with the cover that waterproofs the contact opening / closing mechanism without using a separate member such as a handle, and at the same time, use the pressing plate to seal the flange portion of the cover. By pressing toward the upper surface of the outer periphery of the case body, the sealing bluge portion of the cover and the upper surface of the case body are sealed, and at this time, the protrusion provided on the sealing flange portion of the cover made of an elastic material is attached to the upper surface of the case body. It is pushed into the ridges located on all sides and is recessed. Moreover, since the ridges of the cover made of elastic material are pushed into the ridges of the case body and become recessed, the degree of adhesion at this part is further strengthened, so when pressing the cover from various directions with fingers. However, the engagement of the protrusions can prevent lateral displacement of the sealing flange portion of the cover, and therefore the initial watertight state of the cover can be maintained for a long period of time.

(Example) Hereinafter, the Example of this invention is described with reference to drawings. FIG. 1 shows an example of a push button switch according to the present invention in cross section. This push button switch includes a case body 1 that houses a contact opening / closing mechanism. The state of the case body 1 as seen from diagonally above with other parts assembled is shown in FIG.
FIG. 3 shows the state of the case body 1 as viewed from diagonally above, with the switches remaining almost the same as most of the other parts except for the rest. As shown in these figures, the case body 1 is formed of a resin material, and includes a pedestal portion 2 having a square shape and a boss portion 3 protruding downward from the center thereof as a square tube as a main portion. . A storage recess 4 is formed at the center of the base 2 and has a rectangular opening when viewed from above. The housing recess 4 is formed in an upper opening shape, with the protruding portion of the boss portion 3 being partitioned by a partition wall 5 in the middle. Protrusions 6 each having a semicircular cross section are provided so as to be located on all four sides in a portion of the base 2 corresponding to the outer periphery of the storage recess 4, and the outer periphery of the protrusion 6 is seen from a plane. A sealing ridge 7 is provided so as to surround the quadrilateral. An engagement groove 8 is formed on the inner circumference of the sealing ridge 7.

An inner cover 10 made of rubber or a special soft vinyl chloride resin material and having flexibility or an elastic material such as rubber having elasticity is formed in the center of the base portion 2.
Are installed so as to be concentric with the storage recess 4. The inner cover 10 has a raised flexible portion 11 in the center and a sealing flange portion 12 on the outer periphery thereof. The flexible portion 11 has a recessed portion 13 corresponding to the upper side of the storage recessed portion 4 on the inside in the protruding portion thereof, and the recessed portion 13 and the storage recessed portion 4 form one sealed space. . On the back surface of the sealing flange portion 12, there is formed a ridge (which is depressed by being pushed into the ridge 6 in the figure) 14 that abuts against the above-mentioned ridge 6, and at the outermost periphery of the sealing flange portion 12. An engaging protrusion 15 is formed which is engaged in the engaging groove 8. The upper surface of the sealing flange portion 12 is a pressing plate 17 so that the upper surface of the sealing ridge 7 of the base plate portion 2 is at the same height.
The pressing plate 17 and the sealing ridge 7 are fixed by being adhered by an adhesive or an ultrasonic heat welding method. As a result, the space between the base 2 and the flexible portion 11 is sealed, and the switch body (contact opening / closing mechanism) 20 is housed in this sealed space. Here, by pressing the pressing plate 17 against the upper surface of the sealing ridge 7, the pressing flange 17 presses the sealing flange portion 12 of the cover 10 toward the upper surface of the outer periphery of the case body 1, whereby the cover 10 is sealed. Flange part 12
And the upper surface of the case body 1 is hermetically sealed, and the ridges 14 provided on the sealing flange portion 12 of the cover 10 made of an elastic material are pressed into the ridges 6 located on the four sides of the upper surface of the case body 1 to be recessed. Become. Therefore, even when the flexible portion 11 of the cover 10 is pushed with various fingers from various directions, the sealing flange portion of the cover 10 is formed by the engagement of the protrusions 6 and 14 with each other.
It is possible to prevent the displacement movement of 12 in the lateral direction (the direction indicated by the arrow A in FIG. 1). The ridges 14 of the cover 10, especially made of elastic material
Is pushed into the ridges 6 of the case body 1 and is in a recessed state, so that the degree of adhesion at this portion is further strengthened. Therefore, the initial waterproof state of the cover 10 (the pressing plate 17 and the case body 1
The state where the sealing flange portion 12 of the cover 10 is evenly sandwiched between and can be maintained for a long period of time.
It is possible to prevent rainwater from entering the contact opening / closing mechanism side. The actuator 21 of the switch body 20 has an inner cover 10
When the flexible portion 11 is pushed, the actuator 21 of the switch body 20 is pushed. Therefore, the flexible portion 11 of the inner cover 10 also serves as a handle.

The switch body 20 is a microgap switch and is installed on a printed board 23 mounted in the storage 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 a lead wire 24 electrically connected to the switch body 20 as shown in FIG. The tip is connected. The lead wires 24 are led out to the outside through the wiring insertion holes formed in the partition wall 5, and are connected to, for example, a new alarm device (not shown). An embedding recess 26 is formed in a portion of the boss portion 3 corresponding to the outside of the partition wall 5, and an adhesive 27 is embedded in the embedding recess 26. The adhesive 27 completely blocks ingress of moisture and the like from the side of the mounting box (not shown). Since the switch body 20 which is a contact opening / closing mechanism is incorporated in the space sealed by the case body 1 and the inner cover 10, the switch body 20 is prevented from being sprinkled with water or damp.

On the other hand, cover engaging protrusions 32 arranged at four points are provided on the upper surface of the case body 1. This engagement protrusion
32 and the decorative plate 41 engage with each other, and the decorative plate 41 is fitted to the case body 1. 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, and a waterproof packing 40 and a decorative plate 41 are fitted and attached via the projection 39. . The waterproof packing 40 is made of a special soft vinyl chloride resin material, or
A fitting protrusion 42 is formed of a rubber material in a four-sided frame shape and protrudes on the upper surface thereof, and a fitting receiving groove 43 formed on the back surface side of the body peripheral edge projection 39 is fitted therein. The waterproof packing 40 has a groove 44 on its back surface so as to effectively adhere to the surface of a building material such as a bathroom. In addition, the mounting frame 45 for one port provided on the back surface of the case body 1 is screwed to the front surface of the mounting box, and the case body 1 is fixed to the mounting frame 45 by the mounting screws 46.
The waterproof packing 40 adheres to the construction material. Further, as shown in FIGS. 1 and 2, the decorative plate 41 has an opening 47 at the center so that the flexible portion 11 of the inner cover 10 is exposed upward.

Then, when the inner cover 10 also serving as a handle is pushed, the flexible portion 11 is pushed down, and the flexible portion 11 pushes down the actuator 21 to turn the switch body 20 on and off. Then, when the pushing operation of the flexible portion 11 of the inner cover 10 is stopped, the flexible portion 11 returns. As a result, the switch body 20 turns on and off.

[Advantages of the Invention] As described above, the present invention includes a case body for accommodating a contact opening / closing mechanism in which contacts are turned on / off by a push operation,
A cover that covers the contact opening / closing mechanism and is waterproofly fitted to the case body, and a pressing plate that presses the sealing flange portion provided on the outer periphery of the cover toward the outer peripheral upper surface of the case body. A ridge located on all four sides and an engagement groove located on the outer peripheral side of the ridge,
The cover is made of an elastic material, and is attached to the lower surface of the cover flange portion of the cover while the cover flange portion of the cover is pressed toward the outer peripheral upper surface of the case body by the pressing plate. Providing a protrusion that is pushed in and recessed and an engagement protrusion that is located on the outer peripheral side of the protrusion and that engages in the engagement groove of the case body, the cover operates a handle that pushes and operates the contact opening / closing mechanism. Since it also serves as a cover, the number of parts such as the handle and the spring for urging the handle can be reduced, the assembly can be simplified, the cost for the part and the assembly can be reduced, and the handle is waterproof. Since it also serves as a structure, it is particularly effective when thinning is desired. Further, by pressing the sealing flange portion of the cover toward the outer peripheral upper surface of the case body with the pressing plate, the sealing flange portion of the cover and the upper surface of the case body are sealed, and the sealing flange portion of the cover made of an elastic material is provided. The ridges are pushed into the four ridges located on the upper surface of the case body and become recessed.Therefore, even when the cover is pushed with various fingers, the ridges are engaged with each other. The cover's sealing flange can be prevented from slipping laterally, and as a result, the initial watertight state of the cover (the state where the cover's sealing flange is evenly held between the pressing plate and the case body) is maintained for a long period of time. Can be maintained
As a result, it is possible to prevent rainwater from entering the contact opening / closing mechanism side.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention, FIG. 2 is an exploded perspective view of the same as above, FIG. 3 is an exploded perspective view of the same as above, and FIG. 4 is an exploded perspective view showing a mounting state of the switch main body above. FIG. 5 is a sectional view of a conventional example. Reference numeral 1 is a case body, and 10 is an inner cover.

Claims (1)

(57) [Claims] 1. A case body for contracting a contact opening / closing mechanism in which contacts are turned on / off by a pressing operation, a cover which covers the contact opening / closing mechanism and is watertightly fitted to the case body, and a sealing flange provided on the outer periphery of the cover. A pressing plate that presses the portion toward the outer peripheral upper surface of the case body, and protrusions that are located in four directions on the outer peripheral upper surface of the case body, and engagement grooves that are located on the outer peripheral side of the protrusions. The cover is made of an elastic material, and is pressed into the ridge of the case body while being pressed against the lower surface of the cover sealing flange portion by the pressing plate toward the outer peripheral upper surface of the case body. A protrusion that is recessed due to the opening and an engagement protrusion that is located on the outer peripheral side of the protrusion and that engages in the engagement groove of the case body. Push button switch which is characterized in that sleep.