JPS58117616A - Pushbutton switch part - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to push-button switch parts that can be used in desktop electronic computers, push-button telephones, etc. Contact is made by arranging the contact point, pressing the operating part and adding the outer blade.
This relates to an improved structure of a push-button switch that allows new signals to be obtained.

Conventionally, a typical push button switch consists of, for example, a dome-shaped rubber elastic body with a contact part made of a conductive rubber material at the inner center, and a pair of fixed contacts provided on a printed circuit board. and when a downward force is applied to the central part of the dome-shaped elastic body, the contact part made of a conductive rubber material contacts the fixed contact and creates a contact state between the fixed contacts, It is known that when an external force is removed, the rubber elastic body moves away from the fixed contact due to its repulsive elasticity, thereby canceling the short-circuited state.

However, as mentioned above, (1) switches using conductive rubber contacts (2), the repulsion and viscoelastic behavior of the conductive rubber contacts themselves, the complex viscoelastic behavior of the human fingertip when operating the switch, and (2) When the contact is separated from the fixed contact on the board, the dome-shaped rubber elastic body that was pressed returns to its original shape (when it returns, the current waveform is greatly disturbed due to the repulsive behavior of the rubber elastic body, etc.) and chattering or pattering occurs. This method has a major disadvantage in that it tends to cause a simulating phenomenon, and therefore causes erroneous calculations when it is used in, for example, a desk-top electronic computer.

The present invention provides an improved push button switch component that can almost completely prevent the chattering or bouncing phenomenon seen in conventional products. Circular press operation part (
The inner central part of υ is the thick inner part 121, and the operating part (1
) A thin shoulder part (3) is formed in the radial direction from the outer circumference of the shoulder part 137, with a concentric thick part 14+ projecting in the axial direction from the lower end of the shoulder part 137, and a thin annular part extending in the 111 m direction from the upper end of this thick part. The leg portion (5) is integrally formed, and the annular base portion (6) is integrally formed at the lower end of the leg portion 15.

Hereinafter, the switch component according to the present invention C2 will be explained in detail based on the attached drawings.

Fig. 1 and Fig. 2 illustrate different representative aspects of the parts of the spindle of the present invention, and in the figure (
1) is a circular pressing operation part, (21 is a thick part at the inner center of the operation part (1), (1) is a thin shoulder part provided in the radial direction from the outer surface of the operation part (1), (47 151 is a circular thick-walled part concentric with the operating part (1) that protrudes in the axial direction from the lower end of the shoulder part (3), and 151 is a thin-walled annular part that extends in the axial direction from the upper end of the thick-walled part (4). The leg part is a slightly thick annular base part provided at the lower end.

That is, in the present invention, the parts are arranged as follows: inside the pressing operation part; thick wall - shoulder; thin wall - protruding concentric circle; thick wall - leg part; thin wall -
Annular base; in particular, it is essential to have a thickness of C and no compartments.

In addition, in the present invention (2), when the switch component does not apply any external force to the operating portion, the positional relationship between the upper end of the operating portion (1) and the upper end of the thick wall portion (4) is It is desirable to form the upper end flat part of (1) further than the upper end flat part of thick inner part (4).

As the switch parts, for example, hard 1 [30 to 70 (J
Silicone rubber (I8K 6301) is recommended, but it goes without saying that in addition to the above-mentioned silicone rubber, natural rubber, synthetic rubber, etc. can be used as the rubber material.

In the switch component according to the present invention, a contact portion made of, for example, a conductive rubber material is provided in the thick interior Q) at the center inside the width of the operating portion, and this contact portion is connected to, for example, a fixed contact provided on a printed circuit board. They can be used by arranging them to face each other.

In addition, if the contact points provided in the thick wall part (21) at the inner center of the operating part (11) are ≦ 2, then a separately manufactured rubber contact member may be joined and integrated into the thick inner part by any method, or the thick wall part of the thick wall part If the thickness is considerable, only the lower part (the part marked with a dot inside the reference numeral in Fig. 2) may be formed integrally by blending a 244 material, or it may be formed integrally with a conventionally known method. It may be provided as appropriate by the method described above.

As shown in FIG.
When 1) is pressed downward (in the direction of arrow 1) with a fingertip, etc., the product first reaches the state shown in FIG. From the state shown in Figure 11)), the thin wall N interposed between the thick interior (21 and the annular thick interior (4))
Part 4 (6; does not undergo any deformation change, but is merely displaced relative to the yoke, and minute C: deforms, but is hardly noticeable to the naked eye), the thick interior (4) and the base part placed on the printed circuit board. After passing through a state in which only the thin-walled leg (5) intervening between 1 and 2 is depressed, the thin-walled leg 151 then sinks in. Because it easily (= absorbs deformation (-acts as a shock absorbing part of the wood, in other words, a buffer part), the thick part ■ has a counterbore 11i [
The thick portion (4) is pressed vertically in an extremely stable state without being transmitted, resulting in the state shown in (0) in the same figure.

Next, when the pressing force is released, the switch parts are moved by the restoring force of the dome-shaped body itself as shown in Fig. 4 1o), lb), la
Return to the original shape in the order of J.

Therefore, in the switch component C2 of the present invention, the thick inner part (4) of the dome-shaped main body (relatively deformable and has high rigidity), this thick part (4J) (2 adjacent thin shoulder parts (6) ) and ≦: Due to the presence of each of the thin-walled legs (which are relatively deformable), the thin-walled portion adjacent to the thick-walled portion (4) has relatively high rigidity even if a suppressing force is applied obliquely upward. Because it buffers the suppressing force from diagonally above and divides it into a downward force, a stable contact condition can be obtained, and as a result, there is less damage to the conductive rubber contact part and almost no chattering or cracking occurs. C2 is selected so as to obtain connection and disconnection with clean characteristics without any blemishes.

Although the structure of the switch incorporated in the switch component according to the present invention is not shown in the drawings, it may be constructed such that, for example, a coil spring or the like is included as an auxiliary 1:#4. It is possible to make it faster, or to make the fixed contact (two pairs of l'J[) of the conductive rubber contact part more reliable.

As explained above, in the switch component of the present invention, the concentric thick part (4) protruding radially from the lower end of the shoulder part (53) acts as a rigidity retaining part, and the thick part (4)
Both annular thin-walled parts (6) and (5) in contact with the iron function as vibration absorbing parts, so damage to the contact parts can be effectively prevented. It is possible to prevent the chattering or bouncing phenomenon that previously occurred, and as a result, this product has the excellent property that there is no risk of miscalculation or malfunction even when it is incorporated as a switch in a desk top or push-button telephone. It has many advantages.

[Brief explanation of the drawing]

! Figures 1 and 42 are cross-sectional views showing different aspects of the push-button switch according to the present invention,'! Figure J3 is a sectional view showing an example of the use of the switch component of the present invention and its operation sequence. (1)...Circular suppression operation part, ■...Thick interior, (6
G...Thin chest, (4)...Concentric thick part, (5
)...shoulder leg, 6)...base, σ)...contact part.

Claims (1)

[Claims] 1. Consisting of a dome-shaped rubber elastic body, the circular suppression operation part (
The inner central part of 1) is the thick part Q), and the operating part (1)
) is formed from the outer periphery of 6 radially thinned shoulders (6),
A concentric thick part (4) protruding in the axial direction from the lower end of the shoulder part (6) and a thin annular leg part (5) extending in the axial direction from the upper end of the thick inner part (4) are integrally formed. , further comprising an annular base (6) integrally formed at the lower end of the leg (6).