Push switch

Abstract

The present invention relates to a push switch comprising: a housing having a receiving space with an upper opening and a fixed contact arranged at the bottom of the receiving space; a movable contact member arranged in the receiving space, deformed by a pressing force from above, and thereby in contact with the fixed contact; and a pressing member member arranged on the movable contact member and transmitting the pressing force to the movable contact member. The movable contact member has a pair of first straight-line edges extending in a straight line. The pressing member member has a plurality of convex pressing portions arranged on a bottom surface opposite to the movable contact member. The plurality of pressing portions are arranged on the bottom surface at a position that does not overlap with the later-described straight line, which is a straight line that passes through the center of the movable contact member and intersects with each of the first straight lines in the pair of first straight-line edges.

Description

Technical Field

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

[0002] Patent Document 1 below discloses a push switch in which a top portion of a movable contact member can be pressed by a pusher member provided between a cover sheet and the movable contact member to deform the movable contact member and bring the movable contact member into contact with a center contact portion.

[0003] Prior art literature

[0004] Patent Literature

[0005] Patent Document 1: Japanese Patent Application Publication No. 2018-6021 Summary of the invention

[0006] Problems that the invention will solve

[0007] However, in the technology of Patent Document 1, both side portions of the movable contact member are side cut, so when the operating load of the movable contact member is increased without increasing the size of the movable contact member, there is a concern that the stress amplitude of the both side portions of the movable contact member is increased and cracks are easily generated on the both side portions of the movable contact member.

[0008] Means for solving problems

[0009] A push switch in one embodiment comprises: a housing having a housing space with an upper opening and a fixed contact arranged at the bottom of the housing space; a movable contact member arranged in the housing space, deformed by a pressing force from above, and thereby in contact with the fixed contact; and a pressing piece member provided on the movable contact member and transmitting the pressing force to the movable contact member, the movable contact member having a pair of first straight-line edge portions extending in a straight line, the pressing piece member having a plurality of convex pressing portions provided on a bottom surface opposite to the movable contact member, the plurality of pressing portions being provided on the bottom surface at a position that does not overlap with a straight line described later, the straight line being a straight line that passes through the center of the movable contact member and intersects each of the pair of first straight-line edge portions.

[0010] Effects of the Invention

[0011] According to one embodiment, the operation load of the movable contact member can be increased while suppressing an increase in stress amplitude at both side portions of the movable contact member. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 This 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 This is a perspective view showing the appearance of the bottom surface side of the pusher member according to one embodiment.

[0015] Figure 4 It is a plan view showing the pressing position of the metal contact of the pusher member according to one embodiment.

[0016] Figure 5 1 is a diagram showing the relationship between the distance, the operation load, and the stress amplitude in the push switch according to one embodiment.

[0017] Figure 6 1 is a diagram showing the relationship between the length of a push switch according to an embodiment, and the operation load and stress amplitude.

[0018] Figure 7 1 is a diagram showing the relationship between the angle of the push switch, the operation load, and the stress amplitude according to one embodiment.

[0019] Figure 8 It is a diagram showing a first modified example of the pusher member according to one embodiment.

[0020] Fig. 9 It is a diagram showing a second modified example of the pusher member according to the embodiment.

[0021] Fig.10 This is a diagram showing a comparative example of the operation load between the push switch according to one embodiment and a conventional push switch.

[0022] Fig.11 This is a diagram showing a comparative example of stress amplitudes between a push switch according to an embodiment and a conventional push switch.

[0023] Fig.12 FIG. 1 is a diagram showing a first example of a push member used in a conventional push switch.

[0024] Fig.13 It is a diagram showing a second example of a push piece member used in a conventional push switch. DETAILED DESCRIPTION

[0025] Hereinafter, an embodiment will be described with reference to the accompanying drawings. In addition, in the following description, for convenience, the Z-axis direction in the drawings is set as the up-down direction. In addition, the Y-axis direction in the drawings is set as the left-right direction. In addition, the X-axis direction in the drawings is set as the front-back direction.

[0026] (Overview of Push Switch 100)

[0027] Figure 1FIG. 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 includes a housing 110 having a thin rectangular parallelepiped shape in the Z-axis direction. A cover sheet 140 is provided on the upper surface of the housing 110. A dome-shaped operating portion 141 protruding upward is formed in the center of the cover sheet 140.

[0028] The push switch 100 can be switched between an open state and a closed state by pressing the operating portion 141 downward. Specifically, the push switch 100 is in a closed state when the operating portion 141 is pressed, and the first fixed contact 111 (see FIG. 14) provided in the housing 110 is closed. Figure 2 ) and the second fixed contact 112 (refer to Figure 2 ) becomes a non-conducting state.

[0029] On the other hand, the push switch 100 is turned on by pressing the operating portion 141 downward, and the metal contact 120 (see Figure 2 ), the first fixed contact 111 and the second fixed contact 112 are in the conducting state. In addition, if the push switch 100 is released from the pressing operation of the operating portion 141, it will automatically return to the original state due to the elastic restoring force of the metal contact 120. As a result, the push switch 100 automatically becomes the closed state.

[0030] (Configuration of Push Switch 100)

[0031] Figure 2 FIG. 1 is an exploded perspective view of a push switch 100 according to an embodiment. Figure 2 As shown, the push switch 100 includes a housing 110 , a metal contact 120 , a push piece member 130 , and a cover sheet 140 in this order from the bottom of the figure.

[0032] The housing 110 is a container-shaped component having a rectangular parallelepiped shape. The housing 110 has a substantially rectangular shape with the X-axis direction being the length direction and the Y-axis direction being the width direction when viewed from above. The housing 110 is formed with a receiving space 110A with an upper opening. The receiving space 110A has a substantially rectangular shape with the X-axis direction being the length direction and the Y-axis direction being the width direction when viewed from above. The metal contact 120 and the pressing member 130 are accommodated in the receiving space 110A. For example, the housing 110 is formed by insert molding using a relatively hard insulating raw material (such as a hard resin, etc.).

[0033] Four first fixed contacts 111 and three second fixed contacts 112 are provided at the bottom of the receiving space 110A. The four first fixed contacts 111 are provided at each of the four corners at the bottom of the receiving space 110A. Each of the four first fixed contacts 111 is electrically connected to the metal contact 120 by contacting the peripheral portion of the metal contact 120 provided in the receiving space 110A. The three second fixed contacts 112 are arranged at the center of the bottom of the receiving space 110A. When the top of the metal contact 120 is deformed into a concave shape, the three second fixed contacts 112 contact the central portion of the metal contact 120 (i.e., the inner portion of the top), thereby being electrically connected to the metal contact 120, and being conducted to each of the four first fixed contacts 111 via the metal contact 120. For example, the first fixed contacts 111 and the second fixed contacts 112 are formed by processing a metal plate.

[0034] The metal contact 120 is an example of a “movable contact member.” The metal contact 120 is a dome-shaped member formed of a thin metal plate. The metal contact 120 is disposed in the housing space 110A of the housing 110 .

[0035] The outer shape of the metal contact 120 is configured to have a pair of first curved edge portions 122 at the front and rear and a pair of first straight edge portions 123 at the left and right when viewed from above. The first curved edge portion 122 is a portion extending in a curved shape along a circumference having a predetermined radius. The first straight edge portion 123 is a portion extending in a straight line along the X-axis direction. The metal contact 120 is a component having a circular shape when viewed from above, whereas the left and right side portions are cut in a straight line along the X-axis direction, thereby forming an outer shape having a pair of first curved edge portions 122 and a pair of first straight edge portions 123. That is, the metal contact 120 becomes a metal contact having a strip shape with the X-axis direction as the length direction and the Y-axis direction as the width direction.

[0036] The metal contact 120 contacts each of the four first fixed contacts 111 provided at the bottom of the storage space 110A at its outer peripheral edge, and is electrically connected to each of the four first fixed contacts 111. When the metal contact 120 is pressed by the operating portion 141, if the top 121 (central portion) is pressed downward by the pressing piece component 130 and exceeds the prescribed operation load, the top 121 is rapidly deformed (reverse action) into a concave shape. As a result, the metal contact 120 contacts the second fixed contact 112 provided at the bottom of the storage space 110A through the inner portion of the top 121, and is electrically connected to the second fixed contact 112. When the pressing force from the pressing piece component 130 is released, the metal contact 120 returns to its original convex shape by elastic force.

[0037] The pressing member 130 is placed on the top 121 (i.e., the center) of the metal contact 120. The pressing member 130 is formed using a resin material such as PET. The upper surface of the pressing member 130 has a top 131 in the center and is convexly domed at the top. The pressing member 130 is bonded to the inner side of the top 141A of the operating portion 141 of the cover sheet 140 by any bonding means (such as laser welding, etc.).

[0038] The outer shape of the pressing member 130 is configured to have a pair of second curved edges 132 at the front and rear and a pair of second straight edges 133 at the left and right when viewed from above. The second curved edge 132 is a portion extending in a curved shape along a circumference having a predetermined radius. The second straight edge 133 is a portion extending in a straight line along the X-axis direction. The pair of second straight edges 133 are parallel to the pair of first straight edges 123 of the metal contact 120. The pressing member 130 is a member having a circular shape when viewed from above, and on the other hand, the left and right side portions are formed into an outer shape having a pair of second curved edges 132 and a pair of second straight edges 133 by cutting the side surfaces in a straight line along the X-axis direction. That is, the pressing member 130 becomes a pressing member having an elongated shape with the X-axis direction as the length direction and the Y-axis direction as the width direction.

[0039] The cover sheet 140 is a thin sheet-like component placed on the upper surface of the housing 110. The cover sheet 140 is formed using a resin raw material such as PET. The cover sheet 140 has a substantially rectangular shape with the X-axis direction as the length direction and the Y-axis direction as the width direction when viewed from above. That is, the cover sheet 140 has a shape substantially the same as the housing 110 when viewed from above. The cover sheet 140 is bonded to the upper surface of the housing 110 by any bonding means (such as laser welding, etc.) while covering the upper surface of the housing 110. The cover sheet 140 seals the housing space 110A by blocking the upper opening of the housing space 110A of the housing 110. A dome-shaped operating portion 141 protruding upward is formed in the center of the cover sheet 140. The operating portion 141 is a portion for the operator to perform a downward pressing operation.

[0040] In addition, the center 120P (top 121 ) of the metal contact 120 , the center 130P (top 131 ) of the pusher member 130 , and the center 140P (top 141A) of the cover piece 140 overlap with each other on the axis AX.

[0041] (Configuration of the Bottom Side of the Presser Member 130)

[0042] Figure 3 FIG. 1 is a perspective view showing the appearance of the bottom side of the pressing member 130 according to one embodiment. Figure 3 As shown, the bottom surface 130B of the pressing member 130 is flat.

[0043] In addition, if Figure 3 As shown, the pressing member 130 of this embodiment is provided with four pressing portions 134 at each of the four corners of the bottom surface 130B. In particular, the four pressing portions 134 are arranged to be point-symmetrical with respect to the center 130P of the pressing member 130 (i.e., the center 120P of the metal contact 120).

[0044] Each pressing portion 134 is provided to protrude downward from the bottom surface 130B. Each pressing portion 134 has a specific height dimension from the bottom surface 130B. In addition, the bottom surface of each pressing portion 134 is flat.

[0045] Figure 3 The straight line SL1 shown is a straight line that passes through the center 130P of the pressing piece member 130 and extends in the Y-axis direction, and is orthogonal to each of the pair of second straight line edge portions 133. Figure 3 The straight line SL2 shown is a straight line that passes through the center 130P of the pusher member 130 and extends in the X-axis direction and is parallel to each of the pair of second straight-line edge portions 133 .

[0046] like Figure 3 As shown, on the bottom surface 130B, each of the four pressing portions 134 does not overlap with the straight line SL1 by being provided at each of the four corners.

[0047] Each pressing portion 134 has an inner peripheral side surface 134A, an outer peripheral side surface 134B, a side surface 134C, and a side surface 134D. The inner peripheral side surface 134A is a side surface extending along the circumference of a circle having a radius L1, wherein the radius L1 is centered on the center 130P of the pressing member 130. The outer peripheral side surface 134B is a side surface extending along the curved edge 132. The side surface 134C is a side surface extending along a straight line that passes through the center 130P of the pressing member 130 and forms a predetermined angle with respect to the straight line SL2. The side surface 134D is a side surface extending along the second straight edge 133.

[0048] (Pressure position of the metal contact 120 based on the pressing piece component 130)

[0049] Figure 4 It is a plan view showing a pressing position of the metal contact 120 by the pressing member 130 according to one embodiment. Figure 4 The pusher member 130 and the metal contact 120 are shown in a state of being overlapped with each other.

[0050] like Figure 4 As shown, the pusher member 130 is provided on the top portion 121 of the metal contact 120 such that the pair of second linear edge portions 133 of the pusher member 130 and the pair of first linear edge portions 123 of the metal contact 120 are parallel to each other.

[0051] In addition, if Figure 4 As shown, the pressing member component 130 can press the metal contact 120 to a position farther away from the straight line SL1 (the straight line passing through the center 130P and the midpoint of the first straight edge 123) in the X-axis direction (i.e., a position that does not overlap with the straight line SL1) by each of the four pressing portions 134 provided at each of the four corners.

[0052] Thus, even when the operation load of the metal contact 120 is increased, the push switch 100 of the present embodiment can press the metal contact 120 by the pusher member 130 while suppressing an increase in the stress amplitude of the first linear edge 123 of the metal contact 120 .

[0053] (Operation load of metal contact 120)

[0054] In addition, in the push switch 100 of the present embodiment, the operation load of the metal contact 120 changes as follows: Figure 3As shown in FIG. 1 , the distance L1 from the center 130P of the push member 130 to the inner peripheral side surface 134A of the pressing portion 134, the length L2 of the inner peripheral side surface 134A, and the angle θ formed by the straight line SL2 with respect to the straight line SL3 are changed. In addition, the straight line SL3 is a straight line connecting the center 130P of the push member 130 and the center 134P of the pressing portion 134. Therefore, the push switch 100 of the present embodiment can set the operation load of the metal contact 120 to the target value by appropriately adjusting the distance L1, the length L2, and the angle θ of the push member 130.

[0055] Figure 5 1 is a diagram showing the relationship between the distance L1 of the push switch 100 and the operation load and stress amplitude according to one embodiment. Figure 5 As shown in (a), the push switch 100 of this embodiment can further increase the operating load of the metal contact 120 by further increasing the distance L1 of the push member component 130 through the "lever principle". Figure 5 As shown in (b), even in this case, the push switch 100 of the present embodiment can hardly increase the stress amplitude of the first linear edge portion 123 of the metal contact 120.

[0056] Figure 6 1 is a diagram showing the relationship between the length L2 of the push switch 100 and the operation load and stress amplitude according to one embodiment. Figure 6 As shown in (a), the push switch 100 of this embodiment reduces the length L2 of the push member component 130, and the deformation of the portion of the metal contact 120 that is not in contact with the push member component 130 becomes larger, so that the operating load of the metal contact 120 can be further increased. Figure 6 As shown in (b), even in this case, the push switch 100 of the present embodiment can hardly increase the stress amplitude of the first linear edge portion 123 of the metal contact 120.

[0057] Figure 7 : is a diagram showing the relationship between the angle θ of the push switch 100 according to one embodiment, the operation load, and the stress amplitude. Figure 7 As shown in (a), the push switch 100 of this embodiment further increases the angle θ of the push piece component 130, thereby increasing the amount of depression near the first linear edge 123 of the metal contact 120, thereby further increasing the operating load of the metal contact 120. Figure 7 As shown in (b), even in this case, the push switch 100 of the present embodiment can hardly increase the stress amplitude of the first linear edge portion 123 of the metal contact 120.

[0058] (First Modification of the Pressing Tool Member 130)

[0059] Figure 8 It is a diagram showing a first modified example of the pusher member 130 according to one embodiment. Figure 8 The pressing member 130-1 of the first modified example shown is arranged with respect to the bottom surface 130B, and a pair of pressing portions 135 are point-symmetrical with respect to the center 130P of the pressing member 130-1. Each pressing portion 135 has an elongated shape in the Y-axis direction (the axial direction orthogonal to the pair of second linear edges 133) extending along the curved edge 132.

[0060] Each pressing portion 135 is provided so as to protrude downward from the bottom surface 130B. In addition, each pressing portion 135 has a specific height dimension from the bottom surface 130B. In addition, the bottom surface of each pressing portion 135 is flat.

[0061] The side surface 135A on the outside of each pressing portion 135 is formed in a curved shape along the curved edge 132. The side surface 135B on the inside (center 130P side) of each pressing portion 135 is formed in a straight line extending in the Y-axis direction. That is, the side surface 135B on the inside of one pressing portion 135 and the side surface 135B on the inside of another pressing portion 135 are parallel to each other.

[0062] like Figure 8 As shown, on the bottom surface 130B, each of the pair of pressing portions 135 is disposed along the pair of curved edge portions 132 so as not to overlap with the straight line SL1 .

[0063] Therefore, the pressing member component 130-1 of the first variant can press the metal contact 120 at a position farther away from the straight line SL1 (the straight line passing through the center 130P and the midpoint of the first straight edge 123) in the X-axis direction (i.e., a position that does not overlap with the straight line SL1) through each pressing portion 135 of a pair of pressing portions 135.

[0064] Thus, the pusher member 130 - 1 of the first modification example can press the metal contact 120 while suppressing an increase in the stress amplitude of the first linear edge portion 123 of the metal contact 120 even when the operation load of the metal contact 120 is increased.

[0065] (Second Modification of the Pressing Tool Member 130)

[0066] Fig. 9 FIG. 2 is a diagram showing a second modified example of the pusher member 130 according to one embodiment. Fig. 9In the second modified example shown in the pusher member 130-2, four push portions 136 are provided at each of the four corners of the bottom surface 130B. In particular, the four push portions 136 are provided in a point-symmetrical manner with respect to the center 130P of the pusher member 130-2.

[0067] Each pressing portion 136 is provided so as to protrude downward from the bottom surface 130B. In addition, each pressing portion 136 has a specific thickness dimension from the bottom surface 130B. In addition, the bottom surface of each pressing portion 136 is flat.

[0068] Fig. 9 The pressing portions 136 shown in FIG. 1 are similar to the pressing portions 136 when viewed from above. Figure 3 Each pressing portion 134 has a linear side surface 136A parallel to the line SL1 , a linear side surface 136B parallel to the line SL2 , a side surface 136C extending along the curved edge 132 , and a side surface 136D extending along the second linear edge 133 .

[0069] Therefore, for the second modified example, the two pressing parts 136 adjacent in the X-axis direction have two mutually opposing side surfaces 136A parallel to each other. In addition, for the second modified example, the two pressing parts 136 adjacent in the Y-axis direction have two mutually opposing side surfaces 136B parallel to each other.

[0070] Therefore, for the pressing piece component 130-2 of the second variant, each pressing portion 136 can be easily formed by processing the area other than each pressing portion 136 into a linear and concave shape along SL1 and SL2 relative to the bottom surface 130B (for example, cutting, stamping, etc.).

[0071] like Fig. 9 As shown, on the bottom surface 130B, the four pressing portions 136 are provided at each of the four corners so as not to overlap with the straight line SL1.

[0072] Therefore, the pressing member component 130-2 of the second variant can press the metal contact 120 at a position farther away from the straight line SL1 (the straight line passing through the center 130P and the midpoint of the first straight edge 123) in the X-axis direction (i.e., a position where the straight line SL1 does not overlap) through each of the four pressing portions 136.

[0073] Thus, the pusher member 130 - 2 of the second modification example can press the metal contact 120 while suppressing an increase in the stress amplitude of the first linear edge portion 123 of the metal contact 120 even when the operation load of the metal contact 120 is increased.

[0074] (Comparison example with conventional push switch)

[0075] Fig.10 This is a diagram showing a comparative example of operation loads between the push switch 100 according to one embodiment and a conventional push switch. Fig.11 This is a diagram showing a comparative example of stress amplitudes between the push switch 100 according to one embodiment and a conventional push switch.

[0076] exist Fig.10 In the graph of , the vertical axis represents the operating load of the metal contact. Fig.11 In the graph of , the vertical axis represents the stress amplitude on both sides of the metal contact. Fig.10 and Fig.11 In the graph of , the horizontal axis represents the type of push switch.

[0077] Here, "A" is used Fig.12 The conventional push switch of the push member component 210 shown in FIG. Fig.13 The conventional push switch of the push member component 220 shown in FIG. Figure 3 The push switch 100 of this embodiment of the push piece component 130 shown in FIG. Figure 8 The push switch 100 of this embodiment is shown in the push piece component 130-1. Fig. 9 The push switch 100 of the present embodiment is shown with the push piece component 130 - 2 .

[0078] In this comparative example, as a conventional push switch, a push switch having the same configuration as the push switch 100 of the present embodiment except for the push piece member is used.

[0079] like Fig.10 As shown, the push switch 100 ("C", "D", "E") of this embodiment can improve the operation load of the metal contact 120 compared with the conventional push switch ("A", "B"). Fig.11 As shown, the push switch 100 (“C”, “D”, and “E”) of the present embodiment can make the stress amplitude of the first linear edge portion 123 of the metal contact 120 equal to or lower than that of the conventional push switch.

[0080] (First Example of a Pushing Tool Component Used in a Conventional Push Switch)

[0081] Fig.12 FIG. 1 is a diagram showing a first example of a push member component used in a conventional push switch. Fig.12As shown in FIG. 1 , the conventional pressing member 210 has a circular shape in a plan view. In addition, the bottom surface 210A of the pressing member 210 is circular and flat. That is, the pressing member 210 presses the top of the metal contact with the entire circular bottom surface 210A.

[0082] (Second Example of Pushing Tool Component Used in Conventional Push Switch)

[0083] Fig.13 FIG. 2 is a diagram showing a second example of a push member component used in a conventional push switch. Fig.13 As shown in FIG. 1 , the conventional pressing member 220 has a circular shape when viewed from above. In addition, the bottom surface 220A of the pressing member 220 is circular and flat. An annular pressing portion 221 is formed on the bottom surface 220A along the outer peripheral edge of the bottom surface 220A. The pressing portion 221 is a portion that protrudes downward from the bottom surface 220A and has a specific thickness dimension from the bottom surface 220A. That is, the pressing member 220 presses the top of the metal contact through the entire annular pressing portion 221 of the bottom surface 220A.

[0084] As described above, the push switch 100 of one embodiment includes: a housing 110 including a housing space 110A having an upper opening, a first fixed contact 111 provided at the bottom of the housing space 110A; a metal contact 120 disposed in the housing space 110A, deformed by a pressing force from above, thereby contacting the first fixed contact 111; and a pressing member 130 provided at the top 121 of the metal contact 120 and transmitting the pressing force to the metal contact 120. The metal contact 120 has a pair of first straight edge portions 123 extending in a straight line. The pressing member 130 has a plurality of convex pressing portions 134 provided on a bottom surface 130B facing the metal contact 120. The plurality of pressing portions 134 are provided on the bottom surface 130B at positions that do not overlap with a straight line SL1 that passes through the center 120P of the metal contact 120 and intersects each of the pair of first straight edge portions 123 .

[0085] Thus, even when the operation load of the metal contact 120 is increased, the push switch 100 of the present embodiment can press the metal contact 120 by the push piece member 130 in a manner that suppresses the increase in the stress amplitude of the first linear edge portion 123 of the metal contact 120. Therefore, the push switch 100 of the present embodiment can suppress the generation of cracks and the like in the metal contact 120, thereby achieving a longer life of the metal contact 120.

[0086] 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 or changes can be made within the scope of the gist of the present invention described in the claims.

[0087] For example, in the push switch of the present invention, the push piece member only needs to have at least a plurality of push portions, and may be a member without side cuts (ie, a member without a pair of second linear edges and having a circular shape in plan view).

[0088] In addition, the pair of first linear edge portions 123 of the metal contact 120 are not limited to straight lines in the mathematical sense, and may be in a large R-shape to the extent that they can be regarded as straight lines.

[0089] The present international application claims priority based on Japanese Patent Application No. 2019-159864 filed on September 2, 2019, the entire contents of which are incorporated herein by reference.

[0090] Description of Reference Numerals

[0091] 100 Push switch

[0092] 110 Housing

[0093] 110A Containment Space

[0094] 111 first fixed contact (fixed contact)

[0095] 112 Second fixed contact

[0096] 120 metal contacts (movable contact parts)

[0097] 120P Center

[0098] 121 Top

[0099] 122 first curved edge

[0100] 123 First straight edge

[0101] 130, 130-1, 130-2 Pressing member components

[0102] 130B Bottom

[0103] 130P Center

[0104] 131 Top

[0105] 132 Second curved edge

[0106] 133 Second straight edge

[0107] 134, 135, 136 Pressing part

[0108] 140 Cover Sheet

[0109] 141 Operation Department

[0110] 141A Top

[0111] SL1 Straight Line

[0112] SL2 Straight Line

Claims

1. A push switch, characterized in that: have: The housing comprises a receiving space with an upper opening and a fixed contact arranged at the bottom of the receiving space; A movable contact member is arranged in the accommodation space and deformed by a pressing force from above so as to contact the fixed contact. The movable contact member is a dome-shaped member formed of a thin metal plate. as well as The pressing member is provided at the center of the movable contact member in a plan view on the dome-shaped top of the movable contact member and transmits the pressing force to the movable contact member. The movable contact member has a pair of first straight edge portions and a pair of first curved edge portions to define the entire periphery of the movable contact member, the pair of first straight edge portions are arranged to be line symmetrical and opposite to each other, and the pair of first curved edge portions are arranged to be line symmetrical and opposite to each other, The pressing member has a pair of second linear edge portions which are arranged in line symmetry and parallel to the pair of first linear edge portions, and a plurality of convex pressing portions which are arranged on a bottom surface facing the movable contact member. The multiple convex pressing portions are arranged on the bottom surface at positions that do not overlap with the straight line described later, and the straight line is a straight line that passes through the center of the movable contact member and intersects each of the pair of first straight line edge portions. The multiple convex pressing portions are arranged to be point-symmetrical with respect to the center of the movable contact member when viewed from above.

2. The push switch according to claim 1, characterized in that: The pressing piece component is provided with the convex pressing portion at each of the four corners of the bottom surface, and each of the corners has a corresponding convex pressing portion among the plurality of convex pressing portions.

3. The push switch according to claim 1, characterized in that: The pressing member has: A pair of curved edges extending along the same circumference; as well as The pair of convex pressing portions extend along each of the pair of curved edge portions, and each of the curved edge portions has a corresponding convex pressing portion among the plurality of convex pressing portions.

4. The push switch according to claim 2, characterized in that: Each of the plurality of convex pressing portions is arranged so as not to be in close contact with each other.

5. The push switch according to claim 1, characterized in that: The center of the movable contact member is located at a position that coincides with the center of the pusher member in a plan view.

6. The push switch according to claim 1, characterized in that: The pair of first straight-line edge portions are line-symmetrical with respect to a virtual line, and the virtual line is at the same distance from the pair of first straight-line edge portions and is parallel to the pair of first straight-line edge portions.

7. The push switch according to claim 1, characterized in that: The pair of first linear edge portions have the same length.

8. The push switch according to claim 1, characterized in that: The pusher member is arranged to completely overlap with the movable contact member in a plan view.

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