JPH0511248U - Small switch - Google Patents

Abstract

(57) [Summary] [Purpose] Assemble by covering the cover cap with the push button from above. This simplifies the assembly process and does not adversely affect the body mechanism. [Structure] A minute protrusion 2 is provided on the outer periphery of the upper end of the push button 1 so that the minute protrusion 2 is locked to the upper edge of the push button sliding hole 4 of the cover cap 3. As a result, even if the cover cap 3 is covered from above the body 5, the push button 1 does not fall out.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a small switch having a structure in which a movable contact plate is operated by operating a push button to switch contacts.

[0002]

[Prior Art]

 Conventionally, in this type of small switch, a cover cap is fitted on a body incorporating fixed contacts and a movable contact plate, and a push button for operating the movable contact plate is slidably mounted vertically on the cover cap. there were. Since the push button is only slidably attached to the cover cap, it has a structure that it will fall down with respect to the cover cap.When assembling a small switch, the cover cap should be turned over and the push button sliding hole on the cover cap should be used. The push button is inserted into, the body is turned upside down, and the body is placed on the cover cap, so that the body and the cover cap are integrated.

[0003]

[Problems to be solved by the device]

 However, if the cover cap and body are assembled upside down, there is a problem that the assembly process is complicated because the process of reversing upside down is required, and if the body is turned upside down, the mechanism incorporated in the body is adversely affected. There is a problem of giving.

The present invention has been made in view of the above problems, and an object of the present invention is to prevent the push button from coming off the cover cap and to cover the cover cap from above. (EN) Provided is a small switch which can be assembled, which can simplify the assembly process and which does not adversely affect the body mechanism.

[0005]

[Means for Solving the Problems]

 In order to achieve the above object, the small switch of the present invention is provided with a minute protrusion 2 on the outer periphery of the upper end of the push button 1 so that the minute protrusion 2 is locked to the upper edge of the push button sliding hole 4 of the cover cap 3.

[0006]

[Action]

 When the push button 1 is attached to the cover cap 3 and the cover cap 3 is put on the body 5, the minute projections 2 on the upper end of the push button 1 are locked to the upper edge of the push button sliding hole 4 so that the push button 1 can be pulled out downward. It is possible to assemble by covering the cover cap 3 from the top without the above.

[0007]

【Example】

 First, the embodiment shown in FIGS. 1 to 4 will be described. Terminal plates 6 and 7 are inserted into the body 5, and a normally closed fixed contact 6a provided at the upper end of the terminal plate 6 and a normally open fixed contact 7a provided at the upper end of the terminal plate 7 are vertically moved. They are arranged at intervals. A movable contact plate 8 is arranged above the body 5 so as to be substantially parallel to the body 5. The base end of the movable contact plate 8 is attached to the dowel 9a at the upper end of the terminal plate 9 inserted in the body 8. It is firmly fixed by crimping. The tip of the movable contact plate 8 is bifurcated, and the movable contact 8b is provided on the inner surface of the tip of the pair of branch pieces 8a. A stopper 10 is provided on the body 8 to prevent the movable contact plate 8 from coming into contact with the movable contact plate 8 when the movable contact plate 8 is bent downward by a certain amount or more and from further lowering. A cover cap 3 is fitted and attached so as to cover the body 5 to which the parts are attached as described above from above, and the push button 1 can be slid vertically in a push button sliding hole 4 provided in the cover cap 3. It has been inserted. A collar portion 11 having a diameter larger than that of the push button sliding hole 4 is provided below the push button 1, and a pressing portion 12 provided at the lower end of the push button 1 is in contact with the movable contact plate 8. When the push button 1 is not pressed, the push button 1 is pushed upward by the movable contact plate 8, and the movable contact 8b and the normally closed fixed contact 6a are in contact with each other. When the push button 1 is pressed, the movable contact plate 8 bends downward and the movable contact 8b comes into contact with the normally open fixed contact 7a. A plurality of microprotrusions 2 (two on each side in this embodiment) are provided on the outer periphery of the upper end of the push button 1, and the microprotrusions 2 are locked at the upper end of the push button sliding hole 4. A minute step portion 13 is provided. When the small switch is assembled, the body 2 is covered with the cover cap 3 from above. At this time, even if the push button 1 attached to the cover cap 3 slides downward, the minute protrusions 2 are small as shown in FIG. The cover cap 3 can be attached by being attached to the stepped portion 13 so that the stepped portion 13 does not slip off downward. Therefore, the body 5 and the cover cap 3 can be assembled without turning over, and the assembly process can be simplified.

Next, the embodiment shown in FIGS. 5 to 7 will be described. In the case of this embodiment, a hooking piece 14 is provided on the upper end of the terminal plate 9, and a locking hole 15 is formed in the hooking piece 14. At the base of the movable contact plate 8, a hooked portion 16 bent in a substantially U shape is provided, and a hooking protrusion 17 and a retaining protrusion 18 are provided on the hooked portion 16. From the state shown in FIG. 7B, the hooked portion 16 can be hooked and attached to the hooking piece 14 as shown in FIG. 7A. At this time, the locking projection 17 is locked in the locking hole 15 and the retaining projection 18 is locked in the hooking piece 14. Also in this embodiment, a minute protrusion 2 is provided on the outer periphery of the upper end of the push button 1, and when the cover cap 3 is put on and assembled, the minute protrusion 2 is locked to the upper end of the push button sliding hole 4 to prevent the push button 1 from moving. It is designed so that it cannot fall out.

[0009]

[Effect of the device]

 As described above, according to the present invention, since the minute projection is provided on the outer periphery of the upper end of the push button so that the minute projection is locked to the upper edge of the push button sliding hole of the cover cap, the cover cap is mounted over the body to be mounted. Even if this is done, the small protrusions on the push button will lock onto the upper end of the push button sliding hole in the cover cap and will not come out downward.As in the conventional method, the body and cover cap are turned over and assembled. It can be assembled without taking the steps, and the assembly process can be simplified to improve productivity and workability. Moreover, since the body is not turned inside out, there is no adverse effect on the mechanism installed on the body, The stability can be improved and the reliability can be improved.

[Brief description of drawings]

FIG. 1 is a cutaway side view of a cover cap portion of an embodiment of the present invention.

FIG. 2 is a front view in which a cover cap portion of the above is cut away.

FIG. 3 is a plan view in which a cover cap of the same is omitted.

FIG. 4 is a cross-sectional view for explaining retaining of the push button of the above.

FIG. 5 is a front view in which a cover cap portion of another embodiment of the above is cut away.

FIG. 6 is a plan view in which a cover cap of the above is omitted.

FIG. 7 shows the attachment of the movable contact plate of the above,
(A) is a front view with a movable contact plate attached, (b)
[Fig. 4] is a front view of a state before attaching a movable contact plate.

[Explanation of symbols]

 1 push button 2 small protrusion 3 cover cap 4 push button sliding hole

Claims (1)

[Claims for utility model registration] [Claim 1] A cover cap is fitted on a body incorporating fixed contacts and a movable contact plate, and a push button for operating the movable contact plate is vertically slidably mounted on the cover cap. A small switch, which is provided with a minute protrusion on the outer periphery of the upper end of the push button so that the minute protrusion is locked to the upper edge of the push button sliding hole of the cover cap.