JP2001135189A - Switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch assuring a proper sense of clicking and a contact and continuity state, irrespective of the misalignment or shape of an operating member. SOLUTION: Even when misalignment occurs between the center of an operation button 120 and the center of a reversing plate 140, a protrusion 146 of the reversing plate 140 is depressed by a bottom 124 of the operation button 120, and a central portion of a dish spring 142 is properly depressed via the protrusion 146 to cause deformation. Therefore, the dish spring 142 can be bent and deformed in a well balanced manner to provide a good sense of clicking. With the well-balanced bending and deformation of the dish spring 142, an annular portion located on the periphery of the protrusion 146 of the central portion of the dish spring 142 with contacts a contact member 130 to provide a wide contact area, assuring a good condition of continuity even when there is, for example, deposition of minute dust particles.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a switch using a reversing plate.

[0002]

2. Description of the Related Art Conventionally, as a switch having a basic structure in which a click feeling at the time of operating a button is obtained by using a disc spring-shaped reversing plate, for example, those shown in FIGS. 8 to 10 are known. I have. The switch shown in FIG. 8 is disposed between a base member 10 and an operation button 20 provided to be displaceable in a direction approaching and separating from the base member 10. A printed wiring board 11 is provided, and a contact member 30 and a reversing plate 40 each made of a conductive material are provided on the printed wiring board 11. That is, in this example, the contact member 30
The inversion plate 40 itself functions as an electrode.

The contact member 30 is provided in a flat shape on the wiring board 11 of the base member 10, and the reversing plate 40 is arranged on the wiring board 11 of the base member 10 so as to cover the contact member 30, and has an outer peripheral portion. Are supported by the base member 10, and the contact member 3 is provided at the center when the operation button 20 is not operated.
It is arranged at a position away from zero. Operation button 20
Has a flange portion 22 on the proximal end outer peripheral portion,
Projection 2 for pressing the above-described reversing plate 40 on the bottom surface
4, which is mounted in a mounting hole or the like of a cabinet (not shown), and is provided so as to be displaceable in a direction approaching or separating from the base member 10.

When the operation button 20 is not operated,
As shown in FIG. 8A, the operation button 20 is arranged at a position separated from the base member 10 by a spring or the like (not shown). Further, the operation button 20 is attached to the base member 1.
By pressing in the direction of 0, the central portion of the reversing plate 40 is pressed by the projection 24 of the operation button 20, and FIG.
As shown in (B), the central portion of the reversing plate 40 comes into contact with the contact member 30 by being inverted and deformed toward the contact member 30. As a result, the reversing plate 40 and the contact member 30 become conductive, and the switch is turned on.

The switch shown in FIG. 9 is similar to that shown in FIG. 8, except that an electrode 44 made of a conductive material is provided at the center of an inversion plate 42 made of an insulating material. It is a thing. Others are the same as the example of FIG. Also in this switch, when the operation button 20 is not operated, the operation button 20 is arranged at a position separated from the base member 10 by a spring or the like (not shown) as shown in FIG. When the operation button 20 is pressed in the direction of the base member 10, the central portion of the reversing plate 42 is pressed by the projection 24 of the operation button 20, and as shown in FIG. The electrode portion 44 of the reversing plate 42 comes into contact with the contact member 30 by the reverse deformation. Thereby, the electrode portion 4 of the reversing plate 42
4 and the contact member 30 become conductive, and the switch is turned on.

The switch shown in FIG. 10 is different from the switches shown in FIGS. 8 and 9 in that a pair of parallel wiring boards 12 and 14 are arranged in a double structure on the base member 10 side.
Electrode portions 16 and 18 are provided at opposing portions of 2 and 14, respectively. Then, the substrate 12 on the operation button 20 side
The reversing plate 46 is disposed on the operating button 2
It is configured to be pressed by the 0 projection 24. In this example, the reversing plate 46 does not constitute an electrode, and may be conductive or insulating.

When the operation button 20 is not operated,
As shown in FIG. 10A, the operation button 20 is disposed at a position separated from the base member 10 by a spring or the like (not shown). Further, the operation button 20 is connected to the base member 10.
10, the central portion of the reversing plate 46 is pressed by the projection 24 of the operation button 20, and FIG.
As shown in (B), the contact member 30 is inverted and deformed. Thereby, one substrate 12 of the base member 10 is deformed in a convex shape toward the other substrate 14, and the respective electrode portions 16 and 18 come into contact with each other. As a result, the electrode portions 16 and 18 of the substrates 12 and 14 are brought into conduction, and the switches are turned on.

[0008]

However, in the above-described prior art, since the reversing plates 40, 42, and 46 are pressed by the projections 24 of the operation buttons 20, the positions of the projections 24 of the operation buttons 20 are reduced. There is a problem that a good click feeling cannot be obtained or an appropriate contact state cannot be obtained due to a positional shift due to an installation error or the like, or a variation in the shape of the projection 24 due to a degree of design freedom. . In particular, in the above-described switch, the operation button 20 and the reversing plates 40, 42, and 46 are generally manufactured and handled as separate members. In some cases, the position of the operation button 20 is displaced, or the protrusion 24 of the operation button 20 is designed by the designer in an unfavorable shape, and the probability that the above-described problem occurs is extremely high.

For example, as shown in FIG. 11, in the example shown in FIG. 8, when the projection 24 of the operation button 20 is displaced by α from the center of the reversing plate 40, the tip of the projection 24 becomes effective. The center of the reversing plate 40 cannot be pressed, and the clicking feeling due to the spring force of the reversing plate 40 does not work. If the projection 24 of the operation button 20 and the center of the reversing plate 40 are misaligned in this way, the contact state between the two becomes worse, and a sufficient contact area cannot be obtained. Due to the adhesion, a proper contact conduction state cannot be obtained, and the function as a switch is impaired. This is the same for the switch shown in FIG.

Further, in the switch shown in FIG. 10, since the electrode portions 16 and 18 are arranged at opposing positions on the base member 10 side, regardless of the position and shape of the operation button 20, each of the electrode portions 16 and 18 is formed. In the worst case, the conduction between them is ensured, but also in this case, the clicking feeling of the button operation is impaired, and if the substrates 12 and 14 do not have a double structure on the base member 10 side. In addition, there is a problem that the structure is complicated and the cost is increased.

SUMMARY OF THE INVENTION An object of the present invention is to provide a switch which can ensure an appropriate click feeling and a contact conduction state irrespective of the displacement or shape of the operation member.

[0012]

In order to achieve the above object, the present invention is arranged between a base member and an operating member provided so as to be displaceable in a direction approaching and separating from the base member, A switch for switching the opening and closing of the contact according to a pressing operation of the operating member, wherein a contact member provided on a surface of the operating member facing the base member, or a contact member provided on a surface of the base member facing the operating member; It is arranged in a state where it covers the contact member on the surface where the member is provided,
A central portion is reversely deformed by the pressing operation of the operating member toward the contact member side, and includes a reversing plate that is in pressure contact with the contact member, wherein the reversing plate has a projecting portion projecting in the central portion in a direction opposite to the contact member. And the protrusion is formed by simultaneous molding with the reversing plate.

In the switch according to the present invention, when the operating member is pressed toward the base member, the protrusion of the reversing plate is pressed by the approach between the operating member and the base member, and the pressing force causes the center of the reversing plate to be pressed. The peripheral portion of the protrusion of the portion is bent in a concave shape and protrudes toward the contact member. As a result, the peripheral portion of the protrusion comes into pressure contact with the contact member, and the contact member and the reversing plate are closed. When the pressing operation on the operating member is released, the operating member is separated from the base member by, for example, the action of a return spring, the reversing plate returns to its original state by its restoring force, and the reversing plate is separated from the contact member. And open.

As described above, in the switch of the present invention, the projection provided at the center of the reversing plate presses and deforms the reversing plate to open and close the contact member and the reversing plate. The point of action is always located at the center of the reversing plate regardless of the attachment position of the operation member.
Further, since no protrusion is provided on the operation member side as in the above-described conventional example, depending on the position and shape of the protrusion,
The point of action of the pressing force on the reversing plate does not shift. Therefore, irrespective of the displacement or shape of the operation member, the central portion of the reversing plate can be appropriately deformed, and a proper click feeling and contact conduction can be ensured. Moreover, in the switch of the present invention, since the projection is formed by simultaneous molding with the reversing plate, the reversing plate can be easily manufactured, and the operation of mounting the reversing plate becomes easy.

[0015]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the switch according to the present invention will be described below. FIG. 1 is a cross-sectional view showing a specific example of the switch according to the present embodiment. FIG. 1A shows a state during non-operation, and FIG. 1B shows a state during operation. The switch of the present example has a base member 110 and an operation button (operation member) 120 provided so as to be displaceable in a direction approaching and separating from the base member 110, and a printed wiring board is provided on the base member 110. The printed circuit board 111 is provided with a contact member 130 and a reversing plate 140 each made of a conductive material. That is, in this example, the contact member 130 and the reversing plate 140 themselves function as electrodes. The contact member 130 is formed in a flat plate shape, and is provided on the printed wiring board 111 on the base member 110 by bonding, printing, or the like. The wiring of the contact member 130 is guided to the outside of the switch via the printed wiring board 111.

On the other hand, the reversing plate 140 has a circular disc spring portion 142 and a projection 146 projecting from the center of the disc spring portion 142 formed simultaneously and integrally by, for example, pressing a sheet metal. An annular conductive member 14 having an outer peripheral portion of the disc spring portion 142 provided on the base member 110.
4 is fixed concentrically with an adhesive sheet 132 or the like. The reversing plate 140 and the conductive member 144
Are arranged concentrically with respect to the contact member 130, and the conductive member 144 is connected to the printed wiring board 1 on the base member 110.
11 is set by bonding, printing, or the like. The wiring of the conductive member 144 is guided to the outside of the switch via the printed wiring board 111. When there is no problem in strength or heat resistance, the contact member 130 or the conductive member 14 is not required.
4 may be constituted by the wiring pattern of the printed wiring board 111. The disc spring portion 142 is arranged so as to cover the contact member 130, and is arranged to be separated from the contact member 130 in a non-operation state. The protruding portion 146 is formed in a hemispherical hollow shape, and protrudes from the center of the disc spring portion 142 in a direction opposite to the contact member 130 (that is, in a direction of the operation button 120 in this example).

The operation button 120 is integrally formed of a synthetic resin or the like, has a flange portion 122 on the outer peripheral portion on the base end side, and has a flat bottom surface portion 124. The projection 146 of the plate 140 is pressed. The operation button 120 is attached to, for example, a mounting hole (not shown) provided in a cabinet or the like of an electric device, and is provided so as to be slidable toward and away from the base member 110.

A return spring (not shown) is disposed between the operation button 120 and the base member 110, and when the operation button 120 is not pressed, the operation button 120 is actuated by the spring force of the return spring. Base member 1
It is arranged at a stand-by position which is separated by a certain distance from 10. Also, when the pressing operation of the operation button 120 is released, the operation button 120 retreats from the base member 110 by the spring force of the return spring, and returns to the standby position.

In the switch having the above-described configuration, when the operation button 120 is pressed, the projection 146 of the reversing plate 140 is pressed by the bottom surface portion 124 of the operation button 120, and as shown in FIG. The central portion of the spring portion 142 is bent in a concave shape and protrudes toward the contact member 130. By the bending operation of the disc spring portion 142, a click feeling of a button operation is obtained. Further, due to the bending of the disc spring portion 142, an annular portion located around the central portion of the projection portion 146 of the disc spring portion 142 projects toward the contact member 130, and this portion contacts the contact member 130. I do. Thereby, the reversing plate 140 and the contact member 130 are electrically connected, and the switch is turned on.

In the switch of the present embodiment as described above, the protrusion 146 provided at the center of the disc spring portion 142 of the reversing plate 140 is provided.
As a result, the disc spring portion 142 is pressed and deformed,
Since the opening and closing of the contact member 130 with the zero are performed, the point of action of the pressing force on the disc spring portion 142 is always located at the center of the disc spring portion 142 regardless of the mounting position of the operation button 120 or the like. .

For example, as shown in FIG.
Even if the center of 20 includes a displacement of α from the center of the reversing plate 140, the bottom 124 of the operation button 120
Accordingly, the protrusion 146 of the reversing plate 140 is pressed, and the center of the disc spring 142 can be appropriately pressed and deformed via the protrusion 146. Therefore, FIG.
As shown in (B), the disc spring portion 142 can be bent and deformed in a well-balanced manner regardless of the displacement α, and a good click feeling can be obtained. Also, such a disc spring portion 14
Since the well-balanced bending deformation of 2 allows the annular portion located at the peripheral portion of the projection 146 at the center of the disc spring portion 142 to come into contact with the contact member 130, a large contact area can be obtained. For example, even when minute dust or the like adheres, a good conduction state can be reliably obtained, and a good function as a switch can be obtained.

Further, since no projection is provided on the operation button 120 side as in the above-described conventional example, the point of action of the pressing force on the disc spring 142 does not shift due to the position, shape, etc. of this projection. . As a result, the operation button 12
Regardless of the displacement or shape of 0, the center portion of the disc spring portion 142 can be appropriately deformed, and an appropriate click feeling and contact conduction state can be secured. Further, in the switch of the present embodiment, since the disc spring portion 142 and the protrusion 146 are formed simultaneously and integrally, the reversing plate 140 can be easily manufactured, and the base member 110 and the like of the reversing plate 140 can be easily formed. Also, the work of attaching to the device becomes easy.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above examples, and various modifications are possible. For example, as shown in FIG. 3, instead of providing the contact member 130 and the reversing plate 140 on the base member 110 side, a printed wiring board 121 is provided on the bottom 124 of the operation button 120, and the printed wiring board 121 is provided on the printed wiring board 121. It may be provided. In the switch shown in FIG. 3, since each component is common, a common reference numeral is assigned.
In this case, when the operation button 120 is pressed, the protrusions 14 of the reversing plate 140
6, the disc spring portion 142 is bent toward the operation button 120 and comes into contact with the contact member 130 provided on the bottom portion 124 of the operation button 120. Even in such a configuration, the center portion of the disc spring portion 142 can be appropriately deformed regardless of the position shift and the shape of the operation button 120, and an appropriate click feeling and contact conduction state can be ensured. Further, the reversing plate 140 can be easily manufactured by simultaneous integral molding.

Further, as shown in FIG. 4, for example, a flexible plate-shaped operation panel 150 may be used as the operation member instead of the operation button 120 described above. In the switch shown in FIG. 4, the components of the base member 110, the contact member 130, and the reversing plate 140 are common, and thus are denoted by common reference numerals. Operation panel 150
Are arranged in a plane by a constant spring force in the non-operation state shown in FIG. And FIG. 4 (B)
As shown in (2), when the operation panel 150 is bent inward by being pressed by the finger 160 or the like from the outside, the projection 146 of the reversing plate 140 is pressed by the inner surface thereof. Thereby, the disc spring portion 142 is bent toward the base member 110 and comes into contact with the contact member 130 provided on the base member 110.

The shape of the projection 146 is not limited to a hollow hemispherical shape. For example, as shown in FIG. 5 (A), a hollow conical projection 146A, for example, as shown in FIG.
, A hollow columnar projection 146B may be provided. Further, the hollow projections 146, 146A, 146
Instead of B, a solid hemispherical projection 146C may be provided, for example, as shown in FIG. Also, for example, FIG.
As shown in FIG.
48 may be provided. By providing such a hole 148, the air in the disc spring portion 142 can easily escape to the outside, the disc spring portion 142 can be deformed smoothly, and light operability and smooth switch operation can be obtained. it can.

FIG. 7 is a plan view showing a specific example of a method of fixing the reversing plate 140 with the adhesive sheet 132. FIG. 7A is an example in which the reversing plate 140 is fixed in a state where the reversing plate 140 is entirely covered by the rectangular adhesive sheet 132A. FIG. 7B shows a band-shaped adhesive sheet 1.
This is an example of fixing the reversing plate 140 in a state of crossing the center of the reversing plate 140 by 32B. Further, FIG.
Is an opening 132 in the center of the rectangular adhesive sheet 132C.
This is an example in which D is provided to expose the protrusion 146. As described above, the fixing method of the reversing plate 140 by the adhesive sheet 132 can be variously selected.

In the switch of the present invention, in addition to the above-described modified examples, an electrode portion is provided on a part of the reversing plate 140 and the contact member 130 as in the conventional example shown in FIG. With this configuration, or as in the conventional example shown in FIG. 10, the contact member 130 has a double structure, and the electrode portions provided on the two substrates are brought into contact with each other by a pressing operation using the reversing plate 140. The configuration may be any. Further, in the above-described example, an example has been described in which the reversing plate 140 and the conductive member 144 are formed separately and fixed with the adhesive sheet 132 or the like, but these are integrally formed by sheet metal pressing or the like. Is also good.

[0028]

As described above, according to the switch of the present invention, the contact between the contact member and the reversing plate is reduced by pressing and deforming the reversing plate by the projection provided at the center of the reversing plate by simultaneous integral molding. I changed it. For this reason, the center portion of the reversing plate can be appropriately deformed irrespective of the displacement and the shape of the operation member, and an appropriate click feeling and a contact conduction state can be secured, so that a high-quality switch can be provided. . In addition, by forming the protrusions simultaneously with the reversing plate by integral molding, it is possible to easily manufacture and mount the reversing plate, and to provide a low-cost switch.

[Brief description of the drawings]

FIG. 1 is a sectional view showing a switch according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing an operation of the switch shown in FIG. 1 when a mounting position is displaced between an operation button and a base member.

FIG. 3 is a sectional view showing a switch according to a second embodiment of the present invention.

FIG. 4 is a sectional view showing a switch according to a third embodiment of the present invention.

FIG. 5 is a cross-sectional view showing another example of the protrusion of the switch according to the embodiment of the present invention.

FIG. 6 is a cross-sectional view showing still another example of the protrusion of the switch according to the embodiment of the present invention.

FIG. 7 is a plan view showing a specific example of a method for fixing a reversing plate with an adhesive sheet according to an embodiment of the present invention.

FIG. 8 is a cross-sectional view showing a first example of a conventional switch.

FIG. 9 is a cross-sectional view showing a second example of the conventional switch.

FIG. 10 is a sectional view showing a third example of a conventional switch.

11 is a cross-sectional view showing an operation of the switch shown in FIG. 8 in a case where a mounting position is displaced between an operation button and a base member.

[Explanation of symbols]

110 ... base member, 111, 121 ... printed wiring board, 120 ... operation button, 122 ... flange part, 124 ... bottom part, 130 ... contact member, 132 ...
... adhesive sheet, 140 ... reversing plate, 142 ... disc spring part, 144 ... conductive member, 146, 146A, 146
B, 146C: Projection, 148: Hole, 150: Operation panel.

Claims (6)

[Claims] An operation member disposed between a base member and an operation member displaceable in a direction approaching and separating from the base member, and switching between opening and closing of a contact according to a pressing operation of the operation member. In the switch, a contact member provided on a surface of the operation member facing the base member, or a contact member provided on a surface of the base member facing the operation member, wherein the contact member is covered on the surface on which the contact member is provided And a reversing plate whose central portion is inverted and deformed toward the contact member by the pressing operation of the operating member, and the reversing plate protrudes in the central portion in a direction opposite to the contact member. A switch having a projection, wherein the projection is formed by simultaneous molding with a reversing plate. 2. The contact member and the reversing plate have electrode portions on at least surfaces facing each other, and the electrode portions are electrically connected to each other by pressing the reversing plate against the contact member. The switch according to claim 1, wherein the switch is a switch. 3. The switch according to claim 2, wherein the electrode portion is electrically connected by a portion around the protrusion of the reversing plate being bent in a concave shape and coming into contact with the contact member. . 4. The switch according to claim 1, wherein a hole for venting air is provided at a top of the protrusion of the reversing plate. 5. The switch according to claim 1, wherein the protrusion of the reversing plate is formed hollow. 6. The switch according to claim 1, wherein the projection of the reversing plate is formed solid.