Push switch

Abstract

The push switch includes: a housing having a first accommodating portion; the central fixed contact is arranged at the bottom of the first accommodating part; a movable contact member disposed in the first housing portion and configured to perform a reverse operation by receiving a pressing force from above, so that a central portion of the movable contact member is in contact with the central fixed contact; and a cover member covering an upper portion of the first housing portion, the movable contact member being formed by overlapping a plurality of metal plates, the lowermost metal plate among the plurality of metal plates having a rotation stop portion provided so as to protrude outward from an outer peripheral edge portion, and the housing having a second housing portion housing the rotation stop portion. The rotation of the lowermost metal plate is suppressed by abutting the rotation stopping part against the inner wall surface of the second accommodating part, the uppermost metal plate among the plurality of metal plates does not have the rotation stopping part, and the push switch is provided with a pressing member for suppressing the rotation of the uppermost metal plate by pressing the surface of the uppermost metal plate from above.

Description

Technical Field

[0001] The invention relates to a push switch. Background Art

[0002] Patent document 1 discloses a technology in which, in a push switch having a plurality of metal contacts (movable contact parts) overlapping each other, a pair of anti-rotation parts projecting from the outer peripheral edge parts are provided on all of the plurality of metal contacts, thereby suppressing all rotation of the plurality of metal contacts.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2021-174722 Summary of the invention

[0006] Problems to be solved by the invention

[0007] However, in the technology of Patent Document 1, when a plurality of metal contacts are reversed by a pressing operation based on a pressing component, the anti-rotation portion of the topmost metal contact closest to the cover sheet provided to cover the plurality of metal contacts jumps up, which may damage the cover sheet.

[0008] Means for solving problems

[0009] A push switch in one embodiment comprises: a housing having a first housing portion; a central fixed contact disposed at the bottom of the first housing portion; a movable contact member disposed in the first housing portion and reversing when subjected to a pressing force from above, so that the central portion contacts the central fixed contact; and a cover member covering the upper portion of the first housing portion, wherein the movable contact member is formed by overlapping a plurality of metal plates, wherein a bottommost metal plate disposed at the bottom of the plurality of metal plates has a rotation-stopping portion disposed so as to protrude outward from an outer peripheral edge portion, wherein the housing has a second housing portion for accommodating the rotation-stopping portion, wherein rotation of the bottommost metal plate is suppressed by the rotation-stopping portion abutting against an inner wall surface of the second housing portion, wherein an uppermost metal plate disposed at the uppermost side of the plurality of metal plates does not have a rotation-stopping portion, and the push switch comprises a pressing member disposed between the cover member and the uppermost metal plate, wherein rotation of the uppermost metal plate is suppressed by pressing a surface of the uppermost metal plate from above.

[0010] Effects of the Invention

[0011] According to one embodiment, it is possible to suppress wear of the movable contact member and damage of the cover member. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

[0014] Figure 3 It is a top view of a push switch according to one embodiment.

[0015] Figure 4 This is a cross-sectional view of a push switch according to an embodiment.

[0016] Figure 5 It is a perspective cross-sectional view of a push switch according to another embodiment. DETAILED DESCRIPTION

[0017] Hereinafter, an embodiment is described with reference to the accompanying drawings. In addition, in the following description, for convenience, the Z-axis direction in the figure is set as the up-down direction, the Y-axis direction in the figure is set as the left-right direction, and the X-axis direction in the figure is set as the front-back direction. Among them, the positive direction of the Z-axis is set as the top, the positive direction of the Y-axis is set as the right, and the positive direction of the X-axis is set as the front.

[0018] (Overview of Push Switch 100)

[0019] Figure 1 FIG. 1 is a perspective view of the appearance of a push switch 100 according to an embodiment. Figure 1 As shown, the push switch 100 as a whole has a thin rectangular parallelepiped shape in the vertical direction (Z-axis direction), and has a rectangular shape with the left-right direction (Y-axis direction) as the long side direction when viewed from above. Figure 1 As shown, the upper surface 160A of the housing 160 of the push switch 100 is covered by the insulator 110. A raised portion 111 that bulges upward (in the positive direction of the Z axis) is formed in the central portion of the insulator 110. A pressing body 120 is bonded to the back side of the raised portion 111. Thus, the push switch 100 can be pressed downward (in the negative direction of the Z axis) by the pressing body 120, and through this pressing operation, the switch can be switched from the off state to the on state.

[0020] (Configuration of Push Switch 100)

[0021] Figure 2 FIG. 1 is an exploded perspective view of a push switch 100 according to an embodiment. Figure 2 As shown, push switch 100 includes housing 160 , movable contact member 150 , and insulator 110 in this order from the lower side (negative side of the Z axis) in the figure.

[0022] The housing 160 is a container-shaped component having a thin rectangular parallelepiped shape in the up-down direction (Z-axis direction). The housing 160 has a rectangular shape with the left-right direction (Y-axis direction) as the long side direction and the front-back direction (X-axis direction) as the short side direction when viewed from above. The housing 160 has a first receiving portion 160B in a shape that is recessed downward from the upper surface 160A. The movable contact component 150 is accommodated in the first receiving portion 160B. For example, the housing 160 is formed by insert molding using a relatively hard insulating material (for example, a hard resin, etc.).

[0023] A central fixed contact 161 and four peripheral fixed contacts 162 are provided at the bottom 160C of the first receiving portion 160B of the housing 160. The central fixed contact 161 is provided at the central portion of the bottom 160C. The four peripheral fixed contacts 162 are provided at the peripheral portions of the bottom 160C. Both the central fixed contact 161 and the peripheral fixed contacts 162 are formed using a conductive material (e.g., a metal material).

[0024] The movable contact member 150 is arranged in the first receiving portion 160B of the housing 160. The movable contact member 150 has a dome shape with a top portion 150A in the center portion and is convex upward (Z-axis positive direction). The movable contact member 150 is subjected to a pressing force from above and performs a reverse motion, whereby the center portion contacts the central fixed contact 161 provided at the bottom 160C of the first receiving portion 160B of the housing 160. The movable contact member 150 is placed on the four peripheral fixed contacts 162 provided at the bottom 160C of the first receiving portion 160B of the housing 160 in a manner that the outer peripheral edge portion of the circular shape contacts each of the four peripheral fixed contacts 162 provided at the bottom 160C of the first receiving portion 160B of the housing 160.

[0025] The movable contact member 150 is a so-called "reversal spring". When the pressing operation based on the pressing body 120 is performed, the top 150A is pressed downward by the pressing body 120. When the prescribed operation load is exceeded, the top 150A is suddenly elastically deformed (reversed) into a concave shape. As a result, the movable contact member 150 contacts the central fixed contact 161 at the back side of the top 150A and is electrically connected to the central fixed contact 161. As a result, the movable contact member 150 can make the central fixed contact 161 and the peripheral fixed contacts 162 conduct to each other via the movable contact member 150. In addition, when the pressing force from the pressing body 120 is released, the movable contact member 150 returns to its original convex shape by elastic force.

[0026] The movable contact member 150 is composed of a bottom metal plate 151 disposed at the bottom and a top metal plate 152 disposed at the top. Both the bottom metal plate 151 and the top metal plate 152 are dome-shaped members that are circular and convex upward (Z-axis positive direction) when viewed from above. Both the bottom metal plate 151 and the top metal plate 152 are formed into a dome shape using thin metal plates.

[0027] It should be noted that in the present embodiment, the movable contact member 150 is expressed as a plurality of metal plates stacked together. However, another expression method may be to express that a plurality of movable contact members 150 are stacked together by regarding one metal plate as one movable contact member 150 .

[0028] The insulating member 110 is a sheet-like member disposed on the upper surface 160A of the housing 160. The insulating member 110 is an example of a "cover member covering the upper portion of the first receiving portion". The insulating member 110 is formed using a resin material such as PET. When viewed from above, the insulating member 110 has a substantially rectangular shape with the left-right direction (Y-axis direction) as the long side direction and the front-back direction (X-axis direction) as the short side direction. That is, the insulating member 110 has substantially the same shape as the upper surface 160A of the housing 160 in a manner that can cover substantially the entire area of ​​the upper surface 160A of the housing 160 when viewed from above. The insulator 110 is bonded to the upper surface 160A of the housing 160 by any bonding means (such as laser welding, etc.) while covering the upper surface 160A of the housing 160. The insulating member 110 seals the first receiving portion 160B of the housing 160 by closing the upper opening of the first receiving portion 160B. A protrusion 111 that protrudes upward (in the positive direction of the Z axis) is formed at the center of the insulator 110. Figure 3 As shown, a pressing body 120 is bonded to the back side of the raised portion 111 .

[0029] The pressing body 120 is a member disposed on the top 150A of the movable contact member 150 and in a space on the back side of the raised portion 111 of the insulator 110. The pressing body 120 has a circular shape when viewed from above (see Figure 3 ), and has a three-dimensional shape protruding upward from the top 130A of the movable contact member 150. The pressing body 120 is formed using a resin material such as PA. The pressing body 120 has a curved upper surface portion along the raised portion 111 of the insulator 110, and is bonded to the back side of the raised portion 111 of the insulator 110 by any bonding means (such as laser welding, etc.) on the upper surface portion. In the present embodiment, the pressing body 120 has a three-dimensional shape in which a hemispherical shape is flattened in the vertical direction (Z-axis direction) (refer to Figure 4). However, the pressing body 120 is not limited thereto, and may be cylindrical, ellipsoidal, etc. In addition, the pressing body 120 is not limited to having a circular shape when viewed from above.

[0030] (Action of Push Switch 100)

[0031] When the push switch 100 of one embodiment is not pressed by the pressing body 120, the movable contact member 150 is in an initial state of being convex upward, so the movable contact member 150 contacts the peripheral fixed contacts 162 but does not contact the central fixed contact 161. That is, the peripheral fixed contacts 162 and the central fixed contact 161 are not connected to each other. Therefore, when the push switch 100 of one embodiment is not pressed by the pressing body 120, it is in a switch-off state.

[0032] When a pressing operation based on the pressing body 120 is performed in the push switch 100 of one embodiment, the pressing body 120 presses the top 150A of the movable contact member 150. And when the operation load based on the pressing operation of the pressing body 120 exceeds a predetermined threshold value, the top 150A of the movable contact member 150 elastically deforms (reverses) into a concave shape. As a result, the movable contact member 150 contacts the central fixed contact 161 through the back side of the top 150A and is electrically connected to the central fixed contact 161. As a result, the push switch 100 makes the central fixed contact 161 and the peripheral fixed contacts 162 mutually conductive via the movable contact member 150, thereby becoming a switch-on state. At this time, the push switch 100 of one embodiment can present a click feeling to the pressing operation based on the pressing body 120 through the reverse action of the movable contact member 150. Therefore, the push switch 100 according to one embodiment can allow the operator to grasp the switching to the on state through tactile sensation.

[0033] In the push switch 100 according to the embodiment, when the pressing operation by the pressing body 120 is released, the movable contact member 150 returns to the original convex shape by its own elastic force. As a result, the push switch 100 returns to the switch-off state.

[0034] (Stop rotation structure)

[0035] Below, refer to Figure 3 as well as Figure 4 , a rotation-stop structure provided in the push switch 100 according to one embodiment will be described. Figure 3 It is a top view of the push switch 100 according to one embodiment. Figure 4 FIG. 1 is a cross-sectional view of a push switch 100 according to an embodiment. Figure 4 In the figure, the insulator 110 is omitted in order to enable visual confirmation of the pressing body 120 from above.

[0036] The bottom metal plate 151 has a stopper 151A that is provided to protrude from the outer peripheral edge of the circle to the outside in the radial direction. In the present embodiment, as an example, the bottom metal plate 151 has two stoppers 151A that are arranged at 180° intervals (i.e., arranged point-symmetrically). One of the two stoppers 151A protrudes in the positive direction of the Y axis, and the other stopper 151A protrudes in the negative direction of the Y axis. Both stoppers 151A are tongue-shaped and extend from the outer peripheral edge of the bottom metal plate 151 in the horizontal direction (i.e., in the direction parallel to the XY plane).

[0037] The housing 160 has a second housing portion 163 that is recessed from the inner wall surface of the first housing portion 160B toward the outside (outside in the radius direction of the circle formed by the bottom metal plate 151). The second housing portion 163 houses the anti-rotation portion 151A of the bottom metal plate 151. In the present embodiment, the housing 160 has two second housing portions 163 as the bottom metal plate 151 has two anti-rotation portions 151A. That is, the housing 160 has the second housing portion 163 on the inner wall surface on the positive side of the Y axis of the first housing portion 160B and the inner wall surface on the negative side of the Y axis of the first housing portion 160B, respectively.

[0038] like Figure 3 as well as Figure 4 As shown, the two anti-rotation parts 151A of the bottom metal plate 151 are respectively received in the two second receiving parts 163 of the housing 160. Thus, when the pressing operation based on the pressing body 120 is performed, even if the bottom metal plate 151 rotates, the two anti-rotation parts 151A of the bottom metal plate 151 abut against the inner wall surfaces of the two second receiving parts 163 of the housing 160, thereby suppressing the rotation of the bottom metal plate 151. Therefore, according to the push switch 100 of one embodiment, the wear of the top metal plate 152 and the bottom metal plate 151 caused by the friction between the top metal plate 152 and the bottom metal plate 151 can be suppressed.

[0039] Here, assuming that the uppermost metal plate 152 is also provided with a similar anti-rotation portion, when the movable contact member 150 performs a reverse motion, the anti-rotation portion of the uppermost metal plate 152 closest to the insulator 110 jumps up, thereby possibly damaging the insulator 110 .

[0040] Therefore, the uppermost metal plate 152 of the push switch 100 according to one embodiment does not have a rotation stopper. Thus, the push switch 100 according to one embodiment can prevent the insulator 110 from being damaged when the movable contact member 150 performs a reverse operation.

[0041] In addition, in the push switch 100 of one embodiment, the uppermost metal plate 152 does not have a rotation stopper, but the uppermost metal plate 152 can be pressed from above by the pressing body 120, so that the rotation of the uppermost metal plate 152 can be suppressed. Therefore, according to the push switch 100 of one embodiment, the wear of the uppermost metal plate 152 and the lowermost metal plate 151 caused by the friction between the uppermost metal plate 152 and the lowermost metal plate 151 can be suppressed.

[0042] In addition, in the push switch 100 of one embodiment, a sufficient distance is provided between the rotation stopper 151A and the insulator 110, so that when the movable contact member 150 performs a reverse operation, even if the rotation stopper 151A of the bottom metal plate 151 jumps up, the rotation stopper 151A does not contact the insulator 110. Thus, the push switch 100 of one embodiment can prevent the insulator 110 from being damaged when the movable contact member 150 performs a reverse operation.

[0043] [Another embodiment]

[0044] Figure 5 It is a perspective cross-sectional view of a push switch 100 - 2 according to another embodiment. Figure 5 The push switch 100-2 of another embodiment shown in FIG. 1 is a modified example of the push switch 100 of one embodiment. Figure 5 As shown, the push switch 100-2 is the same as the push switch 100 of the first embodiment in that it includes a housing 160, an insulator 110, and a push body 120. However, the push switch 100-2 is different from the push switch 100 in that a movable contact member 150, an insulating sheet 140, and a second movable contact member 130 are provided in the first receiving portion 160B of the housing 160 in order from the bottom.

[0045] The second movable contact member 130 is arranged on the upper side of the movable contact member 150 in the first receiving portion 160B of the housing 160. The second movable contact member 130 has a dome shape that is convex upward (in the positive direction of the Z axis) and has a top 130A in the central portion. The second movable contact member 130 is formed into a dome shape using a thin metal plate. The second movable contact member 130 is in contact with a second peripheral fixed contact (not shown) provided in the first receiving portion 160B of the housing 160 and is electrically connected to the second peripheral fixed contact. The second movable contact member 130 is a so-called "reversal spring". When a pressing operation based on the pressing body 120 is performed, the top 130A is pressed downward by the pressing body 120. When the prescribed operating load is exceeded, the top 130A is elastically deformed (reversal action) rapidly into a concave shape. Thus, the second movable contact member 130 contacts the top 150A of the movable contact member 150 at the back side of the top 130A, and is electrically connected to the peripheral fixed contact 162 via the movable contact member 150. When the pressing force from the pressing body 120 is released, the second movable contact member 130 returns to its original convex shape by elastic force.

[0046] The insulating sheet 140 is formed of an insulating material. It is a sheet-shaped component. The insulating sheet 140 is arranged between the second movable contact component 130 and the movable contact component 150 in the first receiving portion 160B of the housing 160. Thus, when the pressing operation of the push switch 100 is not performed, the insulating sheet 140 insulates the second movable contact component 130 and the movable contact component 150 from each other in a manner that the two are not connected to each other. A circular opening 141 is formed in the central portion of the insulating sheet 140. When the pressing operation based on the pressing body 120 is performed, the back side portion of the top 130A of the second movable contact component 130 can be abutted against the top 150A of the movable contact component 150 through the opening 141.

[0047] (Action of pressing switch 100-2)

[0048] When the pressing switch 100-2 of another embodiment performs a half-pressing operation based on the pressing body 120, the pressing body 120 presses the top 130A of the second movable contact member 130, so that the top 130A of the second movable contact member 130 is elastically deformed (reversed) into a concave shape. As a result, the back side of the top 130A of the second movable contact member 130 contacts the top 150A of the movable contact member 150, thereby being electrically connected to the peripheral fixed contact 162 via the movable contact member 150. As a result, the pressing switch 100-2 makes the second peripheral fixed contact and the peripheral fixed contact 162 conduct with each other via the movable contact member 150 and the second movable contact member 130, thereby becoming the first switch-on state. At this time, the pressing switch 100-2 of another embodiment can present a click feeling to the half-pressing operation based on the pressing body 120 through the reversing action of the second movable contact member 130. Therefore, the push switch 100 - 2 of another embodiment can allow the operator to grasp the switching to the on state of the first switch by tactile sensation.

[0049] In addition, when the pressing switch 100-2 of another embodiment performs a full pressing operation based on the pressing body 120, the pressing body 120 further presses the top 130A of the second movable contact member 130. As a result, the second movable contact member 130 presses the top 150A of the movable contact member 150 at the back side of the top 130A, so that the top 150A of the movable contact member 150 is elastically deformed (reversed) into a concave shape. As a result, the movable contact member 150 contacts the central fixed contact 161 through the back side of the top 150A and is electrically connected to the central fixed contact 161. As a result, the pressing switch 100-2 makes the central fixed contact 161 and the peripheral fixed contacts 162 conduct with each other via the movable contact member 150, thereby becoming the second switch-on state. At this time, the push switch 100-2 of one embodiment can provide a click feeling to the full pressing operation of the pressing body 120 by the reversing action of the movable contact member 150. Therefore, the push switch 100-2 of another embodiment can make the operator know the switching to the second switch on state by tactile sense.

[0050] It should be noted that, when the half-pressing operation and the full-pressing operation of the pressing body 120 of the pressing switch 100-2 of another embodiment are released, the movable contact member 150 returns to its original convex shape by its own elastic force, and the second movable contact member 130 returns to its original convex shape by its own elastic force. As a result, the pressing switch 100-2 returns to the switch-off state.

[0051] (Stop rotation structure)

[0052] In the push switch 100-2 of another embodiment, the movable contact member 150 is configured to have a bottom metal plate 151 arranged at the bottom, a top metal plate 152 arranged at the top, and an intermediate metal plate 153 arranged between the bottom metal plate 151 and the top metal plate 152. That is, in the push switch 100-2 of another embodiment, the movable contact member 150 is composed of three overlapping metal plates. The bottom metal plate 151, the top metal plate 152, and the intermediate metal plate 153 are all dome-shaped members that have a circular shape and are convex upward (in the positive direction of the Z axis) when viewed from above. The bottom metal plate 151, the top metal plate 152, and the intermediate metal plate 153 are all formed into a dome shape using thin metal plates.

[0053] In another embodiment of push switch 100-2, bottom metal plate 151 has rotation stopper 151A protruding radially outward from the circular outer periphery. Similarly, middle metal plate 153 has rotation stopper 153A protruding radially outward from the circular outer periphery.

[0054] like Figure 5 As shown, the two rotation stoppers 151A of the bottom metal plate 151 and the two rotation stoppers 153A of the middle metal plate 153 are respectively received in the two second receiving portions 163 of the housing 160. Thus, when the pressing operation based on the pressing body 120 is performed, the two rotation stoppers 151A of the bottom metal plate 151 and the two rotation stoppers 153A of the middle metal plate 153 are respectively in contact with the inner wall surfaces of the two second receiving portions 163 of the housing 160, thereby suppressing the rotation of the bottom metal plate 151 and the middle metal plate 153. Therefore, according to the push switch 100 - 2 of another embodiment, wear of the uppermost metal plate 152 , the middle metal plate 153 and the lowermost metal plate 151 caused by friction between the middle metal plate 153 and the lowermost metal plate 151 and friction between the uppermost metal plate 152 and the middle metal plate 153 can be suppressed.

[0055] In addition, the uppermost metal plate 152 of the push switch 100-2 of another embodiment does not have a rotation stopper. Therefore, the push switch 100-2 of another embodiment can prevent the insulating sheet 140 (another example of a "cover member") from being damaged when the movable contact member 150 performs a reverse operation.

[0056] In the push switch 100-2 of another embodiment, the uppermost metal plate 152 does not have a rotation stopper, but the uppermost metal plate 152 can be pressed from above by the insulating sheet 140 (another example of a "pressing member"), thereby suppressing the rotation of the uppermost metal plate 152. Therefore, according to the push switch 100-2 of another embodiment, the wear of the uppermost metal plate 152 and the middle metal plate 153 caused by the friction between the uppermost metal plate 152 and the middle metal plate 153 can be suppressed.

[0057] As described above, when movable contact member 150 has intermediate metal plate 153, it is preferable to provide rotation stopper 153A also on intermediate metal plate 153. Also, when movable contact member 150 has a plurality of intermediate metal plates 153, it is preferable to provide rotation stopper 153A on each of the plurality of intermediate metal plates 153.

[0058] As mentioned above, although one embodiment of the present invention has been described in detail, the present invention is not limited to these embodiments, and various modifications and changes can be made within the scope of the gist of the present invention described in the claims.

[0059] The present international application claims priority based on Japanese Patent Application No. 2022-114922 filed on July 19, 2022, the entire contents of which are incorporated herein by reference.

[0060] Description of Reference Numerals

[0061] 100, 100-2 push switch

[0062] 110 Insulator

[0063] 111 ridge

[0064] 120 Pressing body

[0065] 130 second movable contact member

[0066] 130A Top

[0067] 140 Insulation sheet

[0068] 141 Opening

[0069] 150 Movable contact part

[0070] 150A Top

[0071] 151 Bottom metal plate

[0072] 151A anti-rotation part

[0073] 152 Top Metal Plate

[0074] 153 Intermediate metal plate

[0075] 153A anti-rotation part

[0076] 160 Shell

[0077] 160A upper surface

[0078] 160B Containment Unit 1

[0079] 160C Bottom

[0080] 161 Central fixed contact

[0081] 162 Peripheral fixed contacts

[0082] 163 Containment Unit 2

Claims

1. A push switch, characterized in that: It comprises: a housing having a first receiving portion; a central fixed contact, disposed at the bottom of the first receiving portion; A movable contact member is disposed in the first receiving portion and is subjected to a pressing force from above to perform a reverse motion so that a central portion contacts the central fixed contact; as well as a cover member covering an upper portion of the first receiving portion, The movable contact member is formed by overlapping a plurality of metal plates. The bottommost metal plate disposed at the bottom of the plurality of metal plates has a rotation stopper protruding outward from the outer peripheral edge. The housing has a second receiving portion for receiving the anti-rotation portion, and the anti-rotation portion is in contact with the inner wall surface of the second receiving portion to suppress the rotation of the bottom metal plate. The uppermost metal plate disposed on the uppermost side of the plurality of metal plates does not have the rotation-stopping portion. The push switch includes a push member that is provided between the cover member and the uppermost metal plate and suppresses rotation of the uppermost metal plate by pressing a surface of the uppermost metal plate from above.

2. The push switch according to claim 1, characterized in that: The movable contact member has a dome-shaped portion, The pressing member is a pressing body that presses the top of the dome-shaped portion of the movable contact member.

3. The push switch according to claim 1, characterized in that: The pressing member is an insulating sheet covering the movable contact member.

4. The push switch according to claim 1, characterized in that: The movable contact member has a substantially circular outer shape.

5. The push switch according to claim 1, characterized in that: The rotation stopper extends in a horizontal direction from the outer peripheral edge portion of the lowermost metal plate.

6. The push switch according to claim 1, characterized in that: The lowermost metal plate has two rotation-stopping portions that are arranged point-symmetrically.

7. The push switch according to claim 1, characterized in that: The movable contact member includes an intermediate metal plate disposed between the lowermost metal plate and the uppermost metal plate. The intermediate metal plate has the rotation-stopping portion.

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