JP2002231091A - Push-button switch - Google Patents

Abstract

(57) [Summary] [Purpose] A push button switch in which operation buttons are arranged on a curved portion formed on an elastic sheet, and particularly, there is no play of the operation buttons and the up and down operation is stable and the push buttons are excellent in operability. About the switch. An elastic sheet having a curved portion formed on a contact portion comprising a movable contact and a fixed contact is provided.
In the switch on which the operation button 12 is mounted, a driving unit 8 is provided on the bending portion 6 so that the driving unit 8 is fitted to the operation button 12 in a concave and convex manner, and a plurality of the elastic sheets 5 are provided on the lower surface of the operation button 12. A support 10 is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button switch in which operation buttons are provided on a curved portion formed on an elastic sheet, and particularly, there is no play of the operation buttons, and the push operation is stable in up and down operation and has good operability. Button switch.

[0002]

2. Description of the Related Art As shown in FIG. 5, a conventional push button switch has a curved portion 44 formed on a substrate 41 provided with a pair of fixed contacts 42, and a projection 4 formed in the curved portion 44.
5, an elastic sheet 43 provided with a movable contact 46 is provided, a projection 47 is provided on the curved portion 44, and a hole 5 provided on the lower surface of an operation button 48 comprising a flange portion 50 and a square portion 49.
The operation button 48 is mounted in a concave-convex engagement with the bracket 1, and the mounting panel 52 is provided by projecting the square portion 49 on the flange 50 provided on the operation button 48.

[0003]

Conventionally, a push-button switch as shown in FIG.
That is, when the operation button is not operated, the flange of the operation button is pressed onto the mounting panel by the elasticity of the bending portion, so that the operation button is arranged in a stable state without bending.

However, when operating the operation button, the bending portion operates not only vertically but also diagonally depending on how the operation button is pressed, so that the contact becomes unstable or the operability is extremely low. There was a problem of bad. In particular, when a large operation button or an end of the operation button is operated, the above-mentioned problem becomes extremely remarkable. SUMMARY OF THE INVENTION The present invention has been made to solve the above problem, and an object of the present invention is to provide a push button switch with good operability in which the up and down movement of an operation button can be stably performed.

[0005]

In order to solve the above-mentioned problems, the present invention provides an elastic sheet having a curved portion formed on a contact portion comprising a movable contact and a fixed contact. In a switch equipped with an operation button, a drive section is provided on the bending section, and the operation button is fitted into the drive section in a concave and convex manner, and a plurality of support sections are arranged on the elastic sheet located on the lower surface of the operation button. Set up. Further, a flange is formed around the lower part of the operation button, and a protrusion is provided on the elastic sheet located on the lower surface of the flange to provide a stopper for the operation button. Further, a concave portion is provided on the lower surface of the operation button, and the concave and convex portion is engaged with the support portion provided on the elastic sheet.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A push button switch according to the present invention comprises:
An elastic sheet 5 having a curved portion 6 formed on a contact portion 4 including a movable contact and a fixed contact is provided, and a driving portion 8 is provided on the curved portion 6 so that the operation button 12 is fitted into the concave and convex. The structure in which the plurality of support portions 10 are provided on the elastic sheet 5 located on the lower surface of the
When the operation button 12 is operated even when the user wears the operation button 12 or operates the operation button 12 from an oblique direction, the operation button 12 is moved up and down while the operation button 12 is supported by the elastic supporting portion 10. It is possible to provide a push button switch with extremely high operability without tilting of the operation button 12 and without unstable contact due to the tilt of the operation button 12.

[0007] A collar 1 is provided around the lower part of the operation button 12.
Since the protrusions 4 are formed and the projections are provided on the elastic sheet 5 located on the lower surface of the flange portion 14 to form the stoppers 11 of the operation buttons 12, no excessive force is applied to the bending portion 6 and the support portion 10. A very long life push button switch is obtained. Further, a recess 32 is provided on the lower surface of the operation button 29.
Is provided so as to engage with the support portion 25 provided on the elastic sheet 20 in an uneven manner, so that even when an excessive force is applied to the operation button 29, the lower surface of the operation button 29 and the support portion 25 do not shift. The operation button 29 moves up and down stably.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below with reference to the drawings. FIG. 1 is a front sectional view showing a first embodiment of a push button switch according to the present invention, FIG. 2 is a front sectional view in the case of operation, and FIG. 3 is an exploded perspective view thereof. In these figures, a lower contact sheet 2 and an upper contact sheet 1 are laminated on and under a spacer 3 to constitute a membrane switch that becomes a contact portion 4, and an elastic sheet 5 is further laminated on the upper surface of the membrane switch. A curved portion 6 is formed on the elastic sheet 5, and a projection 7 is provided at the center of the inner surface of the elastic sheet 5. A gap is provided between the upper contact sheets 1 of the membrane switch. Then, on the upper surface of the curved portion 6, a driving portion 8 provided integrally with two round holes 9 into which operation buttons 12 to be described later are fitted in an uneven manner is integrally formed.

Reference numeral 12 denotes an operation button, which is formed by a square portion 13 and a flange portion 14. A hole 15 is provided at the center of the lower surface of the operation button 12 so as to engage with the outer surface of the driving portion 8 in an uneven manner. A pillar 16 corresponding to the round hole 9 is formed,
The operation button 12 is fitted to the drive unit 8 by fitting into and recessed. In addition, a plurality of support portions 10 that are in contact with the lower surface of the flange portion 14 of the operation button 12 are provided on the elastic sheet 5 and projections are provided in the vicinity thereof, and serve as a stopper 11 that prevents the operation button from being operated downward. Further operation buttons 12
The mounting panel 17 is disposed so that the square portion 13 of the operation button 12 protrudes from the flange portion 14 provided at the bottom.

The push button switch configured as described above presses the operation button 12 from a state where the lower surface of the flange 14 of the operation button 12 is in contact with the plurality of supports 10 provided on the elastic sheet 5. As a result, when a certain pressing force is applied, the bending portion 6 is rapidly reversed as shown in FIG. 2 so that a click feeling is obtained, and the plurality of supporting portions 10 are also bent, so that the projection 7 in the bending portion 6 becomes a membrane. The upper contact sheet 1 of the switch is pressed to contact the lower contact sheet 2. When the pressing force of the operation button 12 is released, the operation button 12 returns to the original state due to the elasticity of the bending portion 6 and the support portion 10. Although the support portion of the present embodiment is formed in a plate shape, the support portion may be a column, and may be formed in a shape according to an operational feeling and operability. In addition, the operation button of the present invention is not only square,
It can also handle shapes such as round shapes.

FIG. 4 shows a second embodiment of the push button switch according to the present invention.
FIG. 4 is a front cross-sectional view showing the embodiment, in which a pair of fixed contacts 19 is disposed on a substrate 18, and a protrusion 2 in a curved portion 21 described later.
2 is provided with a movable contact 23 to form a contact portion 24. Further, an elastic sheet 20 having a curved portion 21 is laminated on the substrate 18, a protrusion 22 is provided at the center of the inner surface thereof, and a movable contact 23 is provided.
9 are arranged with a gap. Then, on the upper surface of the curved portion 21, a driving portion 27 provided with two round holes 28 in which operation buttons 29 described later are fitted into concave and convex portions is formed.

Reference numeral 29 denotes an operation button, which is formed by a square portion 30 and a flange portion 31. A hole 33 is provided at the center of the lower surface of the operation button 29 for engaging the driving portion 27 in a concave and convex manner. A support column 34 corresponding to the round hole 28 is formed, and the operation button 29 is fitted to the drive unit 27 in an uneven manner. The recess 3 is provided on the lower surface of the flange 31 of the operation button 29.
2, a plurality of support portions 25 provided on the elastic sheet 20 are engaged with each other in an uneven relationship, and a projection is provided in the vicinity thereof to form a stopper 26 for preventing the operation button from being operated downward. Further, a mounting panel 35 is provided on the flange 31 provided on the operation button 29 so that the square portion 30 of the operation button 29 protrudes.

The push button switch thus constructed operates in the same manner as the embodiment of FIGS. 1 and 2 except that the support portion 25 provided on the elastic sheet 20 and the recess provided on the lower surface of the operation button 29 are provided. Since the projections 32 are engaged in a concave-convex relationship, the vertical movement of the operation button 29 is more stable, and the operation button 29 is operated without tilting, so that a push button switch with good operability can be obtained.

It should be noted that the present invention is not limited to the above embodiment, and various modifications are possible based on the spirit of the present invention, and these are not excluded from the scope of the present invention.

[0015]

As described above, according to the present invention, the following effects can be obtained. (1) An elastic sheet having a curved portion formed on a contact portion composed of a movable contact and a fixed contact is provided, and a driving portion is provided on the curved portion so that the operation button is unevenly fitted to the elastic sheet. Since a plurality of support portions are provided on the elastic sheet positioned, when operating the operation button, the operation button moves up and down while the operation button is supported by the elastic support portion, so that the operation button does not tilt, An extremely operable push button switch is obtained. (2) An elastic sheet having a curved portion formed on a contact portion composed of a movable contact and a fixed contact is provided, and a driving portion is provided on the curved portion to fit the concave and convex to the operation button and to be provided on the lower surface of the operation button. Since a plurality of support portions are provided on the elastic sheet positioned, even when a large operation button is mounted or the operation button is operated from an oblique direction, the operation button is supported by the elastic support portion. As a result, there is no contact instability due to the inclination of the operation button, and a push button switch with stable contact can be obtained. (3) An elastic sheet having a curved portion formed on a contact portion composed of a movable contact and a fixed contact is provided, and a driving portion is provided on the curved portion so that the operation button is unevenly fitted and the lower surface of the operation button is provided. Since the plurality of supporting portions are provided on the elastic sheet located, the plurality of supporting portions protect the bending portion against the repeated stress of the bending portion, so that the durability of the bending portion can be improved. (4) Since a flange is formed below the operation button and a projection is provided on the elastic sheet located on the lower surface of the flange to serve as a stopper for the operation button, an excessive force is applied to the curved portion and the support portion. As a result, an extremely long-lasting push-button switch can be obtained. (5) Since the concave portion is provided on the lower surface of the operation button and the concave and convex portions are engaged with the support portion provided on the elastic sheet, even if an excessive force is applied to the operation button, the lower surface of the operation button and the support portion are formed. The operation buttons can be stably moved up and down without any deviation.

[Brief description of the drawings]

FIG. 1 is a front sectional view showing a first embodiment of a push button switch of the present invention.

FIG. 2 is a front sectional view showing a case where the push button switch according to the first embodiment of the present invention is operated.

FIG. 3 is an exploded perspective view showing a first embodiment of the push button switch of the present invention.

FIG. 4 is a front sectional view showing a second embodiment of the push button switch of the present invention.

FIG. 5 is a front sectional view showing a conventional push button switch.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Upper contact sheet 2 Lower contact sheet 3 Spacer 4, 24 Contact part 5, 20, 43 Elastic sheet 6, 21, 44 Bending part 7, 22, 45 Projection 8, 27 Driving part 9, 28 Round hole 10, 25 Support Part 11, 26 Stopper 12, 29, 48 Operation button 13, 30, 49 Square part 14, 31, 50 Flange 15, 33, 51 Hole 16, 34 Post 17, 35, 52 Mounting panel 18, 41 Substrate 19, 42 Fixed contact 23, 46 Movable contact 32 Recess 47 Projection

Claims (3)

[Claims] 1. A switch in which a resilient sheet having a curved portion formed on a contact portion including a movable contact and a fixed contact is provided, and a driving unit is provided on the curved portion in a switch having an operation button mounted on the curved portion. A push button switch, wherein the drive unit and the operation button are fitted in a concave and convex manner, and a plurality of support parts are provided on the elastic sheet located on the lower surface of the operation button. 2. A stopper for the operation button, wherein a flange is formed below the operation button and a projection is provided on the elastic sheet located on a lower surface of the flange. The described push button switch. 3. The push button switch according to claim 1, wherein a concave portion is provided on a lower surface of the operation button, and the concave portion is unevenly engaged with a support portion provided on the elastic sheet.