JPS5829861Y2 - push button mechanism - Google Patents

Description

[Detailed description of the invention] The present invention relates to a push-button mechanism, and relates to a push-button mechanism used, for example, in an operating section for inputting the start and stop of cooking, temperature, etc. in a gas oven having an electric control circuit. This provides a reliable return force to the pushbutton, and prevents the internal switch and printed circuit board from being damaged by excessive pushing force from the pushbutton.

Embodiments of the present invention will be described below with reference to the drawings.

In the figure, reference numeral 1 denotes a push button made of synthetic resin, which is slidably fitted into a button hole 3 provided in an operation panel 2 made of synthetic resin. , a boss 1b with a height of 5 mm is formed into a protruding shape, and the boss 1b
The base surface 1a is finished to be a flat surface, and a retaining flange portion 1'C is formed adjacent to the surface 1a.

1 The back side of the button hole 2 has a large diameter corresponding to the pull-out prevention flange 1C of the push button 1, and the step between the large diameter part and the small diameter part is used as a stopper part 3a, and this stopper part 3a prevents the push button 1 from being pulled out. The push button 1 is prevented from slipping out from the button hole 3 to the front side by bringing the stopper flange portion 1C into contact.

Reference numeral 4 denotes a back plate superimposed and fixed on the back side of the operation panel 2, and an opening is provided at a position facing the button hole 3, and a part or the entire circumference of the opening is used as a stopper part 4a, so that the push button 1 can be Back end face 1 of push button 1 when pressed strongly
a hits the stopper part 4a to prevent it from going deeper than that.

Reference numeral 5 denotes a leaf spring that urges the push button 1 outward, and is made of, for example, a phosphorescent plate, and has one end that has an opening into which the boss 1b of the push button 1 is inserted, and pushes the back end surface 1a of the push button 1 outward. , the other end is clamped and fixed between the operation panel 2 and the back plate 4.

6 is a push button switch fixed at a position facing the boss 1b of the push button 1; When pressed, the back end surface 1a of the push button 1
The switch is set from off to on immediately before it hits the stopper portion 4a.

This push button switch 6 is attached to a printed circuit board 7 for an electric control circuit, and the printed circuit board 7 is attached to the operation panel 2. When installed, the push button switch 6 faces the push button 1.

In the above configuration, when the push button 1 is not pressed, it is in the state shown in FIG. 1, the leaf spring 5 pushes the push button 1 outward, and the retaining flange 1C of the push button 1 comes into contact with the stopper part 3a. It stopped there.

When the push button 1 is pressed, the state shown in FIG.
Press a to set from off to on.

Based on the above configuration, the present invention has the following effects.

(1) Even if you try to forcefully push the push button, a part of the stopper prevents you from pushing it further, which prevents excessive pushing force from being applied to internal switches or printed circuit boards, making it safe. be.

(2) Furthermore, since the bending line of the leaf spring is provided on a plane passing through the center of the push button, no twisting force is applied to the push button, allowing smooth operation of the push button.

[Brief explanation of drawings]

Fig. 1 is a side sectional view of a push button mechanism according to an embodiment of the present invention when the push button is not pressed, Fig. 2 is a side sectional view when the push button is pressed, and Fig. 3 is a side sectional view from the back plate side. It is a plan view. 1...Push button, 1b...Boss, 1
C... Retention flange part, 2... Operation panel, 3... Button hole, 3a... Part of stopper, 4... Back plate, 4a... Part of stopper, 5... Leaf spring, 6... Push button switch, 7... Printed circuit board.

Claims (1)

[Scope of utility model registration request] comprising a push button slidably fitted into a buttonhole, a stopper means for regulating the push button to slide within a certain dimension, and a leaf spring for urging the push button outward;
The leaf spring is divided into an upper half and a lower half by a bent part, the upper half is in contact with an end face of the push button, and the bent part is positioned on a plane passing through the center of the push button. Push button mechanism.