Push switch

Abstract

The push switch is provided with: a housing having a housing part; the first fixed contact is arranged at the bottom of the accommodating part; a first movable contact member that is disposed in the housing part, has a dome shape, and contacts the first fixed contact by receiving a pressing force from above and performing a reverse operation; a second movable contact member which is disposed in the housing part and above the first movable contact member, has a dome shape, and is brought into contact with the top of the first movable contact member by receiving a pressing force from above and performing a reverse operation; and a pressing body having a pressing part for pressing the top of the second movable contact member, the second movable contact member having a protruding part protruding toward the first movable contact member, the top of the first movable contact member being pressed by the protruding part when the top of the second movable contact member is pressed by the pressing body, and the top of the second movable contact member being pressed by the pressing body when the top of the second movable contact member is pressed by the pressing body. The protruding part is arranged at a position closer to the outer side than the pressing part of the pressing body.

Description

TECHNICAL FIELD

[0001] The present application relates to a push switch. BACKGROUND

[0002] A two-stage operation push switch in which a first contact plate and a second contact plate are arranged in a housing, a convex portion of the first contact plate is brought into contact with the second contact plate by a first stage deformation of the first contact plate caused by a press of a key top, and the convex portion of the first contact plate is pressed into a central portion of the second contact plate by a second stage deformation of the first contact plate caused by the press of the key top, thereby inverting the second contact plate, is disclosed in Patent Document 1.

[0003] PRIOR ART DOCUMENTS

[0004] PATENT DOCUMENT

[0005] Patent Document 1: Japanese Patent Application Laid-Open No. 2004-31171 SUMMARY

[0006] PROBLEMS TO BE SOLVED BY THE INVENTION

[0007] However, in the technology of Patent Document 1, the convex portion of the first contact plate is provided at the center of the first contact plate, and is sandwiched between the key top and the second contact plate when the key top is pressed, thereby receiving a high load. Therefore, the convex portion of the first contact plate can be crushed by a large number of operations, and contact failure and press failure of the second contact plate can occur.

[0008] MEANS FOR SOLVING THE PROBLEMS

[0009] The push switch according to one embodiment includes a housing having a housing portion, a first fixed contact provided at a bottom of the housing portion, a first movable contact member arranged in the housing portion and having a dome shape, which receives a press force from above to perform an inversion operation, thereby coming into contact with the first fixed contact, a second movable contact member arranged in the housing portion above the first movable contact member and having a dome shape, which receives a press force from above to perform an inversion operation, thereby coming into contact with a top portion of the first movable contact member, and a press body arranged on a top portion of the second movable contact member and having a press portion that presses the top portion of the second movable contact member, the second movable contact member having a protruding portion that protrudes toward the first movable contact member, the protruding portion pressing the top portion of the first movable contact member when the top portion of the second movable contact member is pressed by the press portion of the press body, and the protruding portion being provided at a position that is outward of the press portion of the press body.

[0010] EFFECTS OF THE INVENTION

[0011] According to one embodiment, the protruding portion of the second movable contact member can be prevented from being crushed by long-term use. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 is an appearance perspective view of the push switch according to an embodiment.

[0013] Figure 2 is an exploded perspective view of the push switch according to an embodiment.

[0014] Figure 3 is a YZ plane-based sectional view of the push switch according to an embodiment.

[0015] Figure 4 is an appearance perspective view of the second metal contact provided to the push switch according to an embodiment, as viewed from the upper side.

[0016] Figure 5 is an appearance perspective view of the second metal contact and the push body provided to the push switch according to an embodiment, as viewed from the upper side.

[0017] Figure 6 is an exploded perspective view of the second metal contact and the push body provided to the push switch according to an embodiment, as viewed from the lower side.

[0018] Figure 7 is a perspective sectional view of the second metal contact and the push body provided to the push switch according to an embodiment. DETAILED DESCRIPTION

[0019] Hereinafter, an embodiment will be described with reference to the drawings. In addition, in the following description, for convenience, the Z-axis direction in the drawing is set as the up-down direction, the Y-axis direction in the drawing is set as the left-right direction, and the X-axis direction in the drawing is set as the front-rear direction. Among them, the Z-axis positive direction is set as the upper side, the Y-axis positive direction is set as the right side, and the X-axis positive direction is set as the front side.

[0020] (Outline of push switch 100)

[0021] Figure 1 is an appearance perspective view of the push switch 100 according to an embodiment. As shown in Figure 1 , the push switch 100 has a rectangular parallelepiped shape as a whole, which is thin in the up-down direction (Z-axis direction). As shown in Figure 1 , the upper surface 160A (refer to Figure 2 and Figure 3 ) of the housing 160 of the push switch 100 is covered with the insulating member 110. The raised portion 111 that is convexly raised upward (Z-axis positive direction) is formed in the central portion of the insulating member 110. The push body 120 (refer to Figure 2 and Figure 3 ) is attached to the back side of the raised portion 111. Thus, the push switch 100 can perform a pressing operation based on the pressing of the push body 120 downward (Z-axis negative direction).

[0022] When the push switch 100 is operated as a half-press operation as a pressing operation toward the lower side (Z-axis negative direction) of the pressing body 120, the second peripheral fixed contact 163 and the first peripheral fixed contact 162 (see Figure 2 and Figure 3 ) provided in the housing 160 are brought into conduction with each other, and the first switch becomes an on state.

[0023] In addition, when the push switch 100 is operated as a full-press operation as a pressing operation toward the lower side (Z-axis negative direction) of the pressing body 120, the central fixed contact 161 and the first peripheral fixed contact 162 (see Figure 2 and Figure 3 ) provided in the housing 160 are brought into conduction with each other, and the second switch becomes an on state.

[0024] Further, when the pressing operation of the push switch 100 by the pressing body 120 is released, the push switch 100 returns to an off state.

[0025] (Configuration of push switch 100)

[0026] Figure 2 is an exploded perspective view of the push switch 100 according to an embodiment. Figure 3 is a cross-sectional view of the push switch 100 according to an embodiment based on a YZ plane. As shown in Figure 2 and Figure 3 , the push switch 100 sequentially includes the housing 160, the first metal contact 150, the insulating sheet 140, the second metal contact 130, the pressing body 120, and the insulating member 110 from the lower side (Z-axis negative side) in the drawing.

[0027] <Housing 160>

[0028] The housing 160 is a member having a container shape of a thin rectangular parallelepiped shape in the up-down direction (Z-axis direction). The housing 160 has a rectangular shape in which the left-right direction (Y-axis direction) is a long side direction and the front-rear direction (X-axis direction) is a short side direction when viewed from above. The housing 160 has a housing portion 160B that is recessed toward the lower side from the upper surface 160A. The second metal contact 130, the insulating sheet 140, and the first metal contact 150 are housed in the housing portion 160B. For example, the housing 160 is formed by insert molding using a relatively hard insulating material (for example, a hard resin or the like).

[0029] The bottom portion 160C of the housing portion 160B of the housing 160 has a central portion 160Ca, a first peripheral portion 160Cb, a second peripheral portion 160Cc, and a third peripheral portion 160Cd.

[0030] The central portion 160Ca is formed in the center of the bottom portion 160C. The central fixed contact 161 is provided in the central portion 160Ca. The central fixed contact 161 is an example of the "first fixed contact".

[0031] The first peripheral portion 160Cb is formed outside the central portion 160Ca. The first peripheral portion 160Cb is located slightly lower than the central portion 160Ca. The first peripheral fixed contact 162 is provided in the first peripheral portion 160Cb. The first metal contact 150 is placed on the first peripheral portion 160Cb.

[0032] The second peripheral portion 160Cc is formed outside the first peripheral portion 160Cb. The second peripheral portion 160Cc is located higher than the first peripheral portion 160Cb. The insulating sheet 140 is placed on the second peripheral portion 160Cc.

[0033] The third peripheral portion 160Cd is formed outside the second peripheral portion 160Cc. The third peripheral portion 160Cd is located higher than the second peripheral portion 160Cc. The second peripheral fixed contact 163 is provided in the third peripheral portion 160Cd. The second metal contact 130 is placed on the third peripheral portion 160Cd.

[0034] For example, the central fixed contact 161, the first peripheral fixed contact 162, and the second peripheral fixed contact 163 are formed by processing a metal plate.

[0035] <First Metal Contact 150>

[0036] The first metal contact 150 is an example of the "first movable contact member". The first metal contact 150 is a dome-shaped member having a top portion 151 in the central portion, which is convex in the upward direction (Z-axis positive direction). The first metal contact 150 is formed using a thin metal plate. In the present embodiment, the first metal contact 150 is formed by overlapping three thin metal discs, as an example. The first metal contact 150 is housed in the housing portion 160B of the housing 160 and placed on the first peripheral portion 160Cb of the bottom portion 160C of the housing portion 160B of the housing 160 (see FIG. 2). The first metal contact 150 is movable in the upward direction (Z-axis positive direction) and the downward direction (Z-axis negative direction) with respect to the housing 160. Figure 4) on the back surface portion of the peripheral portion thereof with the first peripheral fixed contact 162 provided to the first peripheral portion 160Cb, and is electrically connected with the first peripheral fixed contact 162. The first metal contact 150 is a so-called "inverted spring" which is pressed downward by the second metal contact 130 when the pressing operation based on the presser 120 is performed, and is sharply elastically deformed (inverted action) to be concave when a prescribed operation load is exceeded. Thereby, the first metal contact 150 contacts with the central fixed contact 161 on the back side of the top portion 151, and is electrically connected with the central fixed contact 161. Therefore, the first metal contact 150 can make the central fixed contact 161 and the first peripheral fixed contact 162 conductive to each other via the first metal contact 150. In addition, the first metal contact 150 returns to the original convex shape by the elastic force when the pressing force from the second metal contact 130 is released.

[0037] <Insulating sheet 140>

[0038] The insulating sheet 140 is formed using an insulating material. It is a sheet-shaped member. The insulating sheet 140 is disposed between the second metal contact 130 and the first metal contact 150. Thereby, the insulating sheet 140 insulates the second metal contact 130 and the first metal contact 150 from each other in a manner that they are not conductive to each other when the pressing operation of the press switch 100 is not performed. The circular opening portion 141 is formed in the central portion of the insulating sheet 140. That is, the opening portion 141 is formed at a position overlapping with the top portion 151 of the first metal contact portion 150 and the top portion 131 of the second metal contact portion 130. Thereby, the insulating sheet 140 can dispose the top portion 151 of the first metal contact portion 150 within the opening portion 141. That is, the insulating sheet 140 can make the back side portion of the top portion 131 of the second metal contact 130 abut against the top portion 151 of the first metal contact 150 through the opening portion 141 when the pressing operation based on the presser 120 is performed.

[0039] <Second metal contact 130>

[0040] The second metal contact 130 is an example of a "second movable contact member". The second metal contact 130 is a dome-shaped member having a top portion 131 in the central portion, which is convex in the upward direction (Z-axis positive direction). The second metal contact 130 is formed using a thin metal plate. The second metal contact 130 is housed in the housing portion 160B of the housing 160, and is in contact with and electrically connected to the second peripheral fixed contact 163 provided to the third peripheral portion 160Cd of the bottom portion 160C of the housing portion 160B by being placed on the third peripheral portion 160Cd. The second metal contact 130 is a so-called "inverted spring", and when a pressing operation based on the presser 120 is performed, the top portion 131 is pressed downward by the presser 120, and when a predetermined operation load is exceeded, the top portion 131 is sharply elastically deformed (inverted action) to be concave. Thus, the second metal contact 130 contacts the top portion 151 of the first metal contact 150 at a portion on the back side of the top portion 131, and is electrically connected to the first peripheral fixed contact 162 via the first metal contact 150. When the pressing force from the presser 120 is released, the second metal contact 130 returns to the original convex shape by the elastic force.

[0041] <Presser 120>

[0042] The presser 120 is a member disposed on the top portion 131 of the second metal contact 130 and in the space on the back side of the raised portion 111 of the insulating member 110. The presser 120 has a circular shape when viewed from above, and has a three-dimensional shape protruding upward from the top portion 131 of the second metal contact 130. The presser 120 is formed using a resin material such as PA. The presser 120 has a curved surface-shaped upper surface portion along the raised portion 111 of the insulating member 110, and is adhered to the back side portion of the raised portion 111 of the insulating member 110 by an arbitrary adhesion mechanism (for example, laser welding or the like) at the upper surface portion. In the present embodiment, the presser 120 has a three-dimensional shape in which a semispherical shape is crushed in the upward and downward direction (Z-axis direction). However, the presser 120 is not limited thereto, and can be a cylindrical shape, an ellipsoid, or the like. In addition, the presser 120 is not limited to having a circular shape when viewed from above.

[0043] <Insulating member 110>

[0044] The insulating member 110 is a thin, sheet-like member disposed on the upper surface 160A of the housing 160. The insulating member 110 is formed using a resin material such as PET. When viewed from above, the insulating member 110 has a rectangular shape with the left-right direction (Y-axis direction) as the long side direction and the front-rear direction (X-axis direction) as the short side direction. That is, the insulating member 110 has substantially the same shape as the housing 160 when viewed from above. The insulating member 110 is adhered to the upper surface 160A of the housing 160 in a state of covering the upper surface 160A of the housing 160 by an arbitrary adhering mechanism such as laser welding. The insulating member 110 seals the housing 160B by closing the upper side opening of the housing 160B. A protruding portion 111 that protrudes convexly upward (Z-axis positive direction) is formed in the central portion of the insulating member 110. As shown in FIG. 6, the pressing body 120 is adhered to the back side portion of the protruding portion 111. Figure 3

[0045] Further, the outer shape of the second metal contact member 130 has, when viewed from above, a pair of curved edge portions 132 in the left-right direction (Y-axis direction) and a pair of straight edge portions 133 in the front-rear direction (X-axis direction). The curved edge portion 132 is a portion that extends in a curved shape along a circumference having a prescribed radius. The straight edge portion 133 is a portion that extends in a straight line shape in the left-right direction (Y-axis direction). That is, the second metal contact member 130 has a shape in which both side portions in the front-rear direction (X-axis direction) are cut along the length direction (Y-axis direction) of the housing 160. For example, the second metal contact member 130 is a dome-shaped member that has a circular shape when viewed from above, and both side portions in the front-rear direction (X-axis direction) are side cut in a straight line shape in the left-right direction (Y-axis direction), thereby being formed into an outer shape having a pair of curved edge portions 132 and a pair of straight edge portions 133. That is, the second metal contact member 130 has an elongated shape with the left-right direction (Y-axis direction) as the long side direction and the front-rear direction (X-axis direction) as the short side direction.

[0046] (Action of the Pressing Switch 100)

[0047] ​In one embodiment of the push-button switch 100, when a half-press operation based on the pressing body 120 is performed, the pressing body 120 presses down on the top 131 of the second metal contact 130, causing the top 131 of the second metal contact 130 to elastically deform (reverse operation) into a concave shape. As a result, the second metal contact 130 contacts the top 151 of the first metal contact 150 via the back side of the top 131, thereby electrically connecting to the first peripheral fixed contact 162 via the first metal contact 150. Consequently, the push-button switch 100, through the first metal contact 150 and the second metal contact 130, connects the second peripheral fixed contact 163 and the first peripheral fixed contact 162, thus achieving a first switch-on state. At this time, the push-button switch 100 of one embodiment, through the reverse operation of the second metal contact portion 130, can provide a tactile feedback (click feel) during the half-press operation based on the pressing body 120. Therefore, the push-button switch 100 of one embodiment enables the operator to tactilely control the switching to the first switch-on state.

[0048] In another embodiment, when the push-button switch 100 is fully pressed based on the pressing body 120, the pressing body 120 further presses down on the top 131 of the second metal contact 130. As a result, the portion of the second metal contact 130 on the back side of the top 131 presses down on the top 151 of the first metal contact 150, causing the top 151 of the first metal contact 150 to elastically deform (reverse action) into a concave shape. Consequently, the first metal contact 150 contacts the central fixed contact 161 through the portion on the back side of the top 151, thus establishing an electrical connection with the central fixed contact 161. Consequently, the push-button switch 100, via the first metal contact 150, connects the central fixed contact 161 and the first peripheral fixed contact 162, thereby achieving a second switch-on state. At this time, the push-button switch 100 of this embodiment, through the reverse action of the first metal contact portion 150, can provide a tactile feedback during a full press operation based on the pressing body 120. Therefore, the push switch 100 of one embodiment enables the operator to tactilely control the switching to the second switch on state.

[0049] It should be noted that, in one embodiment of the push-button switch 100, when the half-press and full-press operations based on the pressing body 120 are released, the first metal contact 150 returns to its original convex shape due to its own elasticity, and the second metal contact 130 also returns to its original convex shape due to its own elasticity. As a result, the push-button switch 100 returns to the switch-off state.

[0050] (Composition of the second metal contact 130)

[0051] Figure 4 This is a perspective view of the second metal contact 130 provided in a push-button switch 100 according to one embodiment, viewed from above. Figure 5is an external perspective view of the second metal contact 130 and the presser 120 of the push switch 100 according to an embodiment, as viewed from the upper side. Figure 6 is an exploded perspective view of the second metal contact 130 and the presser 120 of the push switch 100 according to an embodiment, as viewed from the lower side. Figure 7 is a perspective cross-sectional view of the second metal contact 130 and the presser 120 of the push switch 100 according to an embodiment.

[0052] As shown in Figures 4 to 7 , the second metal contact 130 is dome-shaped with a top portion 131 in the center portion, on which the presser 120 is arranged. The presser 120 has a press portion 121 that protrudes downward (Z-axis negative side) from a bottom surface 120A and presses the top portion 131 of the second metal contact 130. As shown in Figure 6 , the press portion 121 has a circular shape when viewed from the lower side (Z-axis negative side). The circular shape of the press portion 121 has a smaller radius than the circular shape of the bottom surface 120A.

[0053] In addition, as shown in Figures 4 to 7 , the second metal contact 130 has a protruding portion 134 protruding downward (Z-axis negative side, i.e., the side of the first metal contact 150) from a back surface 130B (i.e., the surface of the side of the first metal contact 150) on the back side of the top portion 131. The protruding portion 134 is opposite to the top portion 151 of the first metal contact 150. When the top portion 131 of the second metal contact 130 is pressed by the presser 120, the top portion 151 of the first metal contact 150 is pressed by the protruding portion 134 arranged on the back side of the top portion 131.

[0054] Here, the protruding portion 134 is arranged outward of the press portion 121 in the horizontal direction (X-axis direction and Y-axis direction). That is, the protruding portion 134 is arranged outward of the circle formed by the outer peripheral portion of the press portion 121 in the horizontal direction (X-axis direction and Y-axis direction).

[0055] Accordingly, the push switch 100 according to an embodiment can press the portion of the top portion 131 of the second metal contact 130 inward of the protruding portion 134 by the press portion 121 of the presser 120. Therefore, when the top portion 151 of the first metal contact 150 is pressed by the protruding portion 134, the protruding portion 134 is not sandwiched between the presser 120 and the first metal contact 150, and thus the load applied to the protruding portion 134 can be released toward the outward direction of the protruding portion 134 in the horizontal direction (X-axis direction and Y-axis direction) according to the push switch 100 according to an embodiment. Therefore, according to the push switch 100 according to an embodiment, the protruding portion 134 of the second metal contact 130 can be prevented from being crushed due to long-term use.

[0056] Further, the protrusion 134 has a ring shape when viewed from the lower side (Z-axis negative side, i.e., the top 151 side of the first metal contact 150).

[0057] Thus, the push switch 100 of one embodiment can uniformly press the top 151 of the first metal contact 150 into a ring shape by the protrusion 134 and press the top 151 straight downward (Z-axis negative direction).

[0058] Further, the push switch 100 of one embodiment has a ring shape by the protrusion 134, and thus when the top 151 of the first metal contact 150 is pressed by the protrusion 134, the load applied to the protrusion 134 from the first metal contact 150 can be uniformly dispersed in the circumferential direction of the protrusion 134, and thus the protrusion 134 of the second metal contact 130 can be prevented from being crushed due to long-term use.

[0059] Further, the push switch 100 of one embodiment has a ring shape by the protrusion 134, and thus the top 151 of the first metal contact 150 can be pressed by the protrusion 134 at a position away from the center of the top 151 (i.e., on the inclined surface), and thus the stroke amount in the up-down direction (Z-axis direction) based on the pressing operation of the presser 120 can be reduced as compared to a configuration in which the center of the top 151 of the first metal contact 150 is pressed.

[0060] Further, the second metal contact 130 has a groove 135 formed along the protrusion 134 on the front surface 130A (i.e., the surface opposite to the surface on the first metal contact 150 side). In this embodiment, since the protrusion 134 has a ring shape, the groove 135 also has a ring shape. Further, the groove 135 is provided at a position further outward than the pressing portion 121 of the presser 120 in the horizontal direction (X-axis direction and Y-axis direction). That is, the groove 135 is provided at a position further outward than the circle formed by the outer peripheral portion of the pressing portion 121 in the horizontal direction (X-axis direction and Y-axis direction). For example, the second metal contact 130 is formed by simultaneously forming the protrusion 134 and the groove 135 by applying pressure to a metal plate from the front surface 130A side by press working.

[0061] Further, the push switch 100 of one embodiment has the groove 135 in the second metal contact 130, and thus when a load is applied to the protrusion 134 from the first metal contact 150, the groove 135 is elastically deformed in a manner to expand in the width direction, and thus the load applied to the protrusion 134 can be released in the width direction of the groove 135, and the load applied to the protrusion 134 can be absorbed, and thus the protrusion 134 of the second metal contact 130 can be prevented from being crushed due to long-term use.

[0062] The above describes one embodiment of the present application, but the present application is not limited to these embodiments, and various modifications or changes can be made within the scope of the gist of the present application described in the claims.

[0063] Further, in the present specification, the "annular shape" of the protruding portion is not limited to a complete annular shape having no interrupted portion, but refers to an annular shape including a portion having a local interruption (i.e., a "substantially annular shape"). That is, in the push switch 100 of one embodiment, the protruding portion 134 can also be configured to have a plurality of curved local protruding portions arranged on the same circumference in a manner to become annular as a whole.

[0064] Further, in the push switch 100 of one embodiment, the protruding portion 134 can have other shapes as long as it is provided at least at a position outward of the pressing portion 121 of the pressing body 120, and is not limited to an annular shape.

[0065] Further, in the above-described embodiment, the pressing portion 121 protruding downward from the bottom surface 120A of the pressing body 120 is provided on the bottom surface 120A, but the pressing portion 121 can not have such a downward protruding portion, and the bottom surface 120A of the pressing body 120 can function as the pressing portion 121.

[0066] Reference Signs

[0067] This international application claims priority based on Japanese Patent Application No. 2022-091737 filed on June 6, 2022, the entire contents of which are incorporated into this international application.

[0068] 100 Push switch

[0069] 110 Insulating member

[0070] 111 Raised portion

[0071] 120 Pressing body

[0072] 120A Bottom surface

[0073] 121 Pressing portion

[0074] 130 Second metal contact (second movable contact member)

[0075] 130A Front surface

[0076] 130B Back surface

[0077] 131 Top portion

[0078] 132 Curved edge portion

[0079] 133 Straight edge portion

[0080] 134 protrusion

[0081] 135 groove

[0082] 140 insulating sheet

[0083] 141 opening

[0084] 150 first metal contact (first movable contact member)

[0085] 151 top

[0086] 160 housing

[0087] 160A upper surface

[0088] 160B accommodating portion

[0089] 160C bottom

[0090] 160Ca central portion

[0091] 160Cb first peripheral portion

[0092] 160Cc second peripheral portion

[0093] 160Cd third peripheral portion

[0094] 161 central fixed contact (first fixed contact)

[0095] 162 first peripheral fixed contact

[0096] 163 second peripheral fixed contact

Claims

1. A push switch characterized by comprising: Having: a housing having a housing portion; a first fixed contact provided at a bottom of the housing portion; a first movable contact member disposed in the housing portion, having a dome shape, receiving a pressing force from above to perform a reverse action, thereby contacting the first fixed contact; a second movable contact member disposed in the housing portion above the first movable contact member, having a dome shape, receiving a pressing force from above to perform a reverse action, thereby contacting a top of the first movable contact member; and a pressing body disposed on a top of the second movable contact member, having a pressing portion pressing the top of the second movable contact member, the second movable contact member has a protruding portion protruding toward the first movable contact member, when the top of the second movable contact member is pressed by the pressing body, the top of the first movable contact member is pressed by the protruding portion, the protruding portion is provided at a position further outward than the pressing portion of the pressing body.

2. The push switch according to claim 1, wherein the protruding portion has a ring shape when viewed from the first movable contact member side.

3. The push switch according to claim 1, wherein the second movable contact member has a groove portion formed on a back side of the protruding portion along the protruding portion on a surface opposite to a surface facing the first movable contact member side.

4. The push switch according to any one of claims 1 to 3, wherein the second movable contact member has a shape cut along a length direction of the housing.

5. The push switch according to any one of claims 1 to 3, wherein an insulating sheet is provided between the first movable contact member and the second movable contact member, and has an opening portion at a position overlapping the top of the first movable contact member and the top of the second movable contact member.

6. The push switch according to any one of claims 1 to 3, wherein the first movable contact member and the second movable contact member are both reverse springs. ​

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