JPH0731960B2 - Push button device - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button device used for telephones, intercoms and other devices.

2. Description of the Related Art Generally, as push button devices used for telephones, intercoms, and other devices, those configured as shown in FIGS. 6 and 7 are known. In FIG. 6 and FIG. 7, reference numeral 21 is a push button, and the push button 21 includes an operating portion 22 that is directly operated by a hand, and a flat plate portion 23 integrally formed on the rear surface of the operating portion 22 and larger than the operating portion 22. The operation shaft 24 is integrally formed on the rear surface of the flat plate portion 23. And the flat plate portion 23 is the upper case
25, a recess 27 formed in each end surface of the lower case 26,
The operation shaft 24 is housed in the case 28 so as to be movable in the front-rear direction, and the operation portion 22 is pushed in the direction of the arrow so that the operation shaft 24 is moved to the case 2 described above.
The operation piece 30 such as the switch 29 mounted in the parts 5 and 26 is configured to be pressed.

Problems to be Solved by the Invention However, in this type of push button device, the printed circuit board 31,
If the mounting positions of the switches 29 and the like vary, the operating piece 30 of the switch 29 may already have been pressed by the operating shaft 24 in a normal state. The gap L between 24 cannot usually be zero. Therefore, the push button 21 normally has the above-mentioned gap L.
There is a problem that it is in a state where it can move freely within the range of, and it vibrates greatly due to vibration and the like.

The present invention eliminates the above-mentioned conventional drawbacks, and an object of the present invention is to provide an excellent push button device having a simple structure and less chattering of the push button.

Means for Solving the Problems In order to achieve the above-mentioned object, the present invention provides a flat plate portion forming a push button with elasticity, fixes both end portions of the flat plate portion to a case, and has an operating portion and an operating shaft. Only the central portion of the flat plate portion is configured to elastically move back and forth.

Therefore, according to the present invention, even if a relatively large gap is formed between the operation piece such as a switch and the operation shaft forming the push button, the flat plate portion forming the push button is fixed to the case at both ends thereof. Therefore, the push button hardly moves freely back and forth in a normal state, and has an effect that chatter hardly occurs due to vibration or the like.

Embodiment FIG. 1 to FIG. 5 show the construction of an embodiment of the push button device of the present invention. 1 to 5, reference numerals 1 and 2 are an upper case and a lower case, respectively, and ribs 5 and 6 forming recesses 3 and 4 for mounting push buttons are integrally formed on the back surface. Further, a cutout 7 into which an operation portion 9 of a push button 8 described later is inserted is formed on the end surface of the lower case 22. Reference numeral 8 denotes a push button which is directly operated by hand, a flat plate portion 10 integrally formed on the rear surface of the operation portion 9 and larger than the operation portion 9, and integrally formed at the central portion of the rear surface of the flat plate portion 10. The operating shaft 11 is composed of 12 is a through hole formed at both ends of the flat plate portion 10, 13 is a protrusion integrally formed on the back surface of both end portions of the flat plate portion 10, the lower portion 13b of the protrusion 13 is more rearward than the upper portion 13a. Is formed so as to protrude. A taper 14 is formed at the lower end of the protrusion 13 to serve as a guide when the protrusion 13 is inserted into the recess 4. Reference numeral 15 is a printed circuit board mounted in the cases 1 and 2, 16 is a switch mounted on the printed circuit board 15, and 17 is an operation piece of the switch 16.

In the above embodiment, the push button 8 is mounted by inserting the operating portion 9 into the notch 7 and the flat plate portion 10 into the recesses 3 and 4. When the flat plate portion 10 is inserted into the concave portions 3 and 4, the lower portion 13b of the protrusion 13 is pressed against the rib 9 as shown in FIG.
Can be installed without rattling. When the operating portion 9 of the push button 8 is pushed in the direction of the arrow with the push button 8 attached, the flat plate portion 10 is elastically curved at the portion where the through hole 12 is formed, and the operating shaft 11 is switched as shown in FIG. The operation piece 17 of 16 is pressed.

When the push operation of the push button 8 is released, the switch 16 returns the operation piece 17 to its original position by a spring or the like (not shown) provided on itself. At the same time, the push button 8 is returned to its original position by the elastic force of the flat plate portion 10, as shown in FIG.

As described above, according to the above-described embodiment, the flat plate portion 10 is made to have elasticity so that both ends thereof are inserted into the concave portion 4 without any rattling, and the operating shaft 11 constituting the push button 8 is a switch.
Even if the push button 8 is separated from the operation piece 17, the push button 8 does not rattle in the concave portion 4, and the chattering by the push button 8 can be almost completely prevented. According to the above-described embodiment, the protrusions 13 are formed on both ends of the flat plate portion 10, the lower portion 13b of the protrusion 13 is projected rearward from the upper portion 13a, and the lower portion 13b is press-fitted into the concave portion 4 formed in the lower case 2. Therefore, when the push button 8 is attached, the push case 8 is first attached to the lower case 2 and then the upper case 1 is attached to the lower case 2.
It has the advantage that it can be mounted simply by coupling it to and its installation is very simple. Further, according to the above-mentioned embodiment, the concave portion 3 is also formed in the upper case 1, and the flat plate portion 10 of the push button 8 is formed therein.
Therefore, even if the push button 8 is strongly pressed, the rib 5 forming the concave portion 3 acts as a stopper and an unnecessary force is not applied to the switch 16 or the like.

In the embodiment, the through hole 12 is formed as a means for giving elasticity to the flat plate portion 10, but that portion may be thinned or the whole may be thinned. Further, in the above embodiment, the push button 8 is attached to the boundary between the upper case 1 and the lower case 2,
It goes without saying that it may be attached to other parts.

EFFECTS OF THE INVENTION As is apparent from the above embodiment, the present invention has a push button integrally formed with a flat plate portion having elasticity, a lower case which has recesses on the inner surface and stores both end portions of the flat plate portion without backlash, An upper case having a rib that engages with the lower case and restricts the movement of the push button when the push button is strongly pressed; and an operation formed in the center of the rear surface of the flat plate portion when the push button is pressed. Since the shaft is provided with a configuration characterized in that the operation piece such as a switch mounted in the lower case is pressed and arranged on the joint surface between the upper case and the lower case, the elastic portion of the push button is It can be inserted without rattling,
Even if the push button is strongly pressed, the ribs of the upper case act as stoppers, and unnecessary force is not applied to the switch, thus improving reliability and facilitating assembly.

[Brief description of drawings]

FIG. 1 is a cross-sectional side view of an embodiment of a push button device of the present invention, FIG. 2 is a perspective view of the same part, FIG. 3 is an exploded perspective view of the same part, and FIGS. FIG. 6 is a sectional side view of a conventional push button device, and FIG. 7 is a perspective view of the relevant part. 1 ... Upper case, 2 ... Lower case, 3,4 ... Concave,
5, 6 ... Rib, 7 ... Notch, 8 ... Push button, 9 ... Operating part, 10 ... Flat plate part, 11 ... Operating shaft, 12 ... Through hole, 13 ...
Protrusion, 14 ... taper, 15 ... printed circuit board, 16 ... switch, 17 ... operation piece.

Claims (1)

[Claims] 1. A push button integrally formed with an elastic flat plate portion, a lower case having a recess on the inner surface for accommodating both end portions of the flat plate portion without rattling, and the push button engaged with the lower case. And an upper case having a rib that restricts the movement of the push button when the push button is strongly pressed, and an operation shaft formed in the center of the rear surface of the flat plate portion when the push button is pressed is mounted in the lower case. Press an operation piece such as a switch,
A push button device arranged on a joint surface between the upper case and the lower case.