Switching device

Abstract

Even when mounted on a circuit board by reflow soldering, the rattling noise of the cover component relative to the housing should be minimized. [Solution] The switch device comprises a housing that houses a fixed contact and a movable contact inside a housing section, a movable contact member disposed in the housing section, an operating member for pressing the movable contact member, and a cover member that covers the base of the operating member. The housing has a projection that protrudes from the side surface of the housing, and the cover member has a hook that hangs down from the edge of the cover member. The hook has an opening into which the projection fits, thereby engaging with the projection, and the side surface of the projection has a restricting portion that contacts the side edge of the opening of the hook, thereby restricting the movement of the hook.

Description

Technical Field

[0001] The present invention relates to a switch device.

Background Art

[0002] Patent Document 1 below discloses a technique for fixing a frame to a housing by engaging a hook of the frame with a claw portion provided on a side surface of the housing in a state where the frame is overlapped on the upper surface of the housing.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] However, in a conventional switch device, when it is mounted on a substrate by reflow, the housing softens due to the reflow heat applied to the housing, and the engagement of the hook of the frame with the protrusion of the housing becomes loose. As a result, when vibration is applied, there is a possibility that a rattling sound of the cover member with respect to the housing may occur.

Means for Solving the Problems

[0005] A switch device according to an embodiment includes a housing that houses a fixed contact and a movable contact inside having a housing portion, a movable contact member disposed in the housing portion, an operating member that presses the movable contact member, and a cover member that covers a base portion of the operating member. The housing has a protrusion provided to protrude from a side surface of the housing, the cover member has a hook provided to hang down from an edge portion of the cover member, the hook has an opening, and when the protrusion fits into the opening, the hook engages with the protrusion, and a side surface of the protrusion has a restricting portion that restricts movement of the hook by abutting against a side edge portion of the opening of the hook. [Effects of the Invention]

[0006] According to one embodiment of the switch device, even when mounted on a circuit board by reflow soldering, rattling noise from the cover member relative to the housing can be almost completely eliminated. [Brief explanation of the drawing]

[0007] [Figure 1] External perspective view of a switch device according to one embodiment. [Figure 2] Exploded perspective view of a switch device according to one embodiment. [Figure 3] Cross-sectional perspective view of a switch device according to one embodiment. [Figure 4] Plan view of the housing of a switch device according to one embodiment. [Figure 5] Right side view of a switch device according to one embodiment. [Figure 6] A partially enlarged view of the switch device shown in Figure 5. [Figure 7] Plan view of a switch device according to one embodiment. [Figure 8] A partially enlarged view of the switch device shown in Figure 7. [Figure 9] Partially enlarged cross-sectional view of a switch device according to one embodiment. [Modes for carrying out the invention]

[0008] An embodiment will be described below with reference to the drawings. For convenience, in the following description, the Z-axis direction in the drawings will be considered as the vertical direction, the Y-axis direction as the left-right direction, and the X-axis direction as the front-back direction. However, the positive Z-axis direction will be considered upward, the positive Y-axis direction as the rightward direction, and the positive X-axis direction as the forward direction.

[0009] (Overview of the switch device 100) Figure 1 is an external perspective view of a switch device 100 according to one embodiment. As shown in Figure 1, the switch device 100 has a configuration in which a cover member 120 is superimposed on the upper surface 110A of the housing 110, and the base 142 of the stem 140 is covered by the cover member 120.

[0010] Furthermore, as shown in Figure 1, a circular opening 120A is formed in the center of the cover member 120. A cylindrical operating part 141, located in the center of the stem 140, passes through the opening 120A. As a result, the operating part 141 of the stem 140 protrudes upward (in the positive Z-axis direction) above the opening 120A.

[0011] The switch device 100 allows the operator to press the operating part 141 of the stem 140 downward (in the negative Z-axis direction), and this pressing operation allows switching in two stages from the switch-off state to a first switch-on state and a second switch-on state.

[0012] (Configuration of the switch device 100) Figure 2 is an exploded perspective view of a switch device 100 according to one embodiment. Figure 3 is a cross-sectional perspective view of the switch device 100 according to one embodiment. Figure 4 is a plan view of the housing 110 included in the switch device 100 according to one embodiment. As shown in Figures 2 and 3, the switch device 100 comprises a housing 110, a cover member 120, a first movable contact member 130, a stem 140, a second movable contact member 150, and an insulating member 160.

[0013] The housing 110 is a container-shaped member having a thin rectangular parallelepiped shape in the vertical direction (Z-axis direction). The housing 110 has a generally square shape in a top view. The housing 110 has a housing portion 110B that is recessed downward from the upper surface 110A and has a circular shape in a plan view from above (the positive Z-axis direction). Inside the housing portion 110B, a stem 140, a first movable contact member 130, and a second movable contact member 150 are accommodated. For example, the housing 110 is formed by insert molding using a relatively hard insulating material (e.g., hard resin, etc.).

[0014] On each of the pair of left and right side surfaces of the housing 110, a protruding projection 111 is formed. When the cover member 120 is attached to the upper surface 110A of the housing 110, the projection 111 is fitted into the opening 121A of the hook 121 of the cover member 120, thereby hooking the hook 121 and fixing the cover member 120 to the housing 110.

[0015] As shown in detail in FIG. 4, on the inner bottom surface of the housing portion 110B of the housing 110, a central fixed contact 112A, two first peripheral fixed contacts 113A, and four second peripheral fixed contacts 114A are provided.

[0016] The central fixed contact 112A is provided at the central portion of the inner bottom surface of the housing portion 110B and is provided opposite to the central portion of the back surface of the second movable contact member 150.

[0017] The two first peripheral fixed contacts 113A are provided on both the left and right outer sides of the central fixed contact 112A on the inner bottom surface of the housing portion 110B. On each of the two first peripheral fixed contacts 113A, each of the pair of arcuate edges of the second movable contact member 150 is placed.

[0018] The four second peripheral fixed contacts 114A are provided at equal intervals (i.e., at 90° intervals) on the outer peripheral edge of the inner bottom surface of the housing portion 110B. Each of the four legs 132 of the first movable contact member 130 is placed on each of the four second peripheral fixed contacts 114A.

[0019] As shown in FIG. 4, in the bottom of the housing 110, the central fixed contact member 112, the first peripheral fixed contact member 113, and the four second peripheral fixed contact members 114 are embedded by insert molding. The central fixed contact member 112, the first peripheral fixed contact member 113, and the four second peripheral fixed contact members 114 are all formed using a conductive plate material (for example, a metal plate).

[0020] As shown in FIG. 4, a central fixed contact 112A is integrally formed on the central fixed contact member 112. Further, the central fixed contact member 112 has an external connection terminal 112B provided to protrude from the side surface on the rear side (negative X-axis side) of the housing 110.

[0021] Also, as shown in FIG. 4, two first peripheral fixed contacts 113A are integrally formed on the first peripheral fixed contact member 113. Further, the first peripheral fixed contact member 113 has an external connection terminal 113B provided to protrude from the side surface on the front side (positive X-axis side) of the housing 110.

[0022] Also, as shown in FIG. 4, a second peripheral fixed contact 114A is integrally formed on each of the four second peripheral fixed contact members 114. Further, each of the four second peripheral fixed contact members 114 has an external connection terminal 114B provided to protrude from the side surface on the front side (positive X-axis side) or the rear side (negative X-axis side) of the housing 110.

[0023] The first movable contact member 130 is provided in the housing portion 110B of the housing 110, below the stem 140 (negative Z-axis side) and above the second movable contact member 150 (positive Z-axis side). The first movable contact member 130 is composed of multiple (two in this embodiment) metal inversion domes 131 stacked on top of each other. The metal inversion dome 131 is a dome-shaped member made of a thin metal plate that can be inverted. The metal inversion dome 131 has a circular shape when viewed from above (positive Z-axis direction) in plan view. A circular planar portion 131A is formed in the center of the metal inversion dome 131 when viewed from above (positive Z-axis direction) in plan view.

[0024] The outer periphery of the metal inverted dome 131 is provided with four legs 132 projecting radially outward at equal intervals (i.e., at 90° intervals). Each of the four legs 132 rests on each of the four second peripheral fixed contacts 114A located on the inner bottom surface of the housing 110B of the housing 110. As a result, the first movable contact member 130 is stably supported at four points by the four legs 132 and is electrically connected to each of the four second peripheral fixed contacts 114A.

[0025] The first movable contact member 130 is a so-called "reversal spring," and when its central portion (i.e., the flat portion 131A) is pressed from above and exceeds a predetermined pressing load, its top portion rapidly deforms elastically into a concave shape (reversal movement). As a result, the back side of the central portion of the first movable contact member 130 comes into contact with the second movable contact member 150, and is electrically connected to each of the two first peripheral fixed contacts 113A via the second movable contact member 150. Consequently, the first movable contact member 130 can electrically connect each of the four second peripheral fixed contacts 114A and each of the two first peripheral fixed contacts 113A via the first movable contact member 130. The first movable contact member 130 returns to its original convex shape by elastic force when the pressure on its central portion is released.

[0026] The first movable contact member 130 may have one or more metal inverted domes 131. Furthermore, the load characteristics of the first movable contact member 130 may be adjustable by adjusting the number of metal inverted domes 131.

[0027] The second movable contact member 150 is provided in the housing portion 110B of the housing 110, below the first movable contact member 130 (negative Z-axis side) and above the inner bottom surface of the housing portion 110B of the housing 110 (positive Z-axis side). The second movable contact member 150 is composed of multiple (three in this embodiment) metal inverting domes 151 stacked on top of each other. The metal inverting dome 151 is a dome-shaped member made of a thin metal plate that can be inverted. When viewed from above (positive Z-axis direction) in plan view, the metal inverting dome 151 has an oval shape with the left-right direction (Y-axis direction) as its longitudinal direction.

[0028] The second movable contact member 150 has each of its left and right arc-shaped edges resting on each of the two first peripheral fixed contacts 113A provided on the inner bottom surface of the housing portion 110B of the housing 110. As a result, the second movable contact member 150 is stably supported at two points by its left and right arc-shaped edges and is electrically connected to each of the two first peripheral fixed contacts 113A. Furthermore, as a result, the central part of the back surface of the second movable contact member 150 faces the central fixed contact 112A.

[0029] The second movable contact member 150 is a so-called "reversal spring," and when its central portion is pressed from above and exceeds a predetermined pressing load, its top portion rapidly deforms elastically into a concave shape (reversal movement). As a result, the central portion of the back surface of the second movable contact member 150 comes into contact with the central fixed contact 112A, and is electrically connected to the central fixed contact 112A. Consequently, the second movable contact member 150 can electrically connect the central fixed contact 112A and each of the two first peripheral fixed contacts 113A to each other via the second movable contact member 150. When the pressure on the central portion of the second movable contact member 150 is released, it returns to its original convex shape by elastic force.

[0030] The second movable contact member 150 may have two or fewer or four or more metal inverted domes 151. Furthermore, the load characteristics of the second movable contact member 150 may be adjustable by adjusting the number of metal inverted domes 151.

[0031] The stem 140 is an example of an "operating member". The stem 140 is a member that is pressed downward (in the negative Z-axis direction) by the operator. The stem 140 is positioned above the first movable contact member 130 (on the positive Z-axis side) in the housing portion 110B of the housing 110, and is provided to be movable in the vertical direction (in the Z-axis direction). It rests on the upper surface 110A and is fixed by the cover member 120 with the housing portion 110B of the housing 110 closed. The stem 140 is formed using a hard resin material or an elastic resin material. The stem 140 has an operating portion 141, a base portion 142, and a pressing portion 143.

[0032] The base portion 142 is a horizontal, flat plate-like part provided around the operating section 141. The base portion 142 has a circular shape when viewed from above (in the positive Z-axis direction). The base portion 142 is provided integrally with the operating section 141 and supports the operating section 141 so that it can move up and down.

[0033] The operating section 141 is located in the center of the upper surface of the base 142 and has a cylindrical shape that protrudes upward from the center of the upper surface of the base 142. The operating section 141 penetrates the opening 120A of the cover member 120 and protrudes above the opening 120A of the cover member 120 (in the positive Z-axis direction), so that it is the part that is pressed by the operator.

[0034] The pressing portion 143 is located in the center of the lower surface of the base portion 142 and has a cylindrical shape that protrudes downward from the center of the lower surface of the base portion 142. The lower surface of the pressing portion 143 is in contact with the center of the upper surface of the first movable contact member 130 (i.e., the flat portion 131A). When the stem 140 moves downward (negative Z-axis direction) due to a pressing operation by the operator, the lower surface of the pressing portion 143 presses against the center of the upper surface of the first movable contact member 130.

[0035] The cover member 120 is a flat, horizontal metal plate. When viewed from above, the cover member 120 has a square shape. The cover member 120 is placed on top of the upper surface 110A of the housing 110. In this way, the cover member 120 closes the housing portion 110B of the housing 110.

[0036] For example, the cover member 120 is formed by processing a metal plate using a method such as press working. In a plan view from above (positive Z-axis direction), a circular opening 120A is formed in the center of the cover member 120 to allow the operating portion 141 of the stem 140 to protrude upward (positive Z-axis direction).

[0037] Furthermore, each of the pair of left and right sides on the outer edge of the cover member 120 is provided with a hook 121 that hangs downward. The hook 121 has an opening 121A into which a projection 111 provided on the side surface of the housing 110 is fitted. In this way, the hook 121 is hooked onto the lower surface of the projection 111, and the cover member 120 can be fixed to the housing 110.

[0038] The insulating member 160 is a sheet-like member made of an insulating material. The insulating member 160 is provided between the first movable contact member 130 and the second movable contact member 150 in the housing portion 110B of the housing 110. The insulating member 160 insulates the first movable contact member 130 and the second movable contact member 150 when no pressing operation is performed by the operator, and when the operating load of the pressing operation by the operator is less than a predetermined value (the value that results in the second switch-on state). In this embodiment, a pair of left and right insulating members 160 are provided so as to avoid the central part of the upper surface of the second movable contact member 150.

[0039] (Operation of switch device 100) In one embodiment of the switch device 100, when the operator is not pressing the operating part 141 of the stem 140, the operating part 141 of the stem 140 is in its highest initial position, and both the first movable contact member 130 and the second movable contact member 150 are in an initial convex position upwards. At this time, each of the four legs 132 of the first movable contact member 130 is in contact with each of the four first peripheral fixed contacts 113A, but not with the second movable contact member 150. Also, at this time, the second movable contact member 150 is in contact with each of the two first peripheral fixed contacts 113A, but not with the central fixed contact 112A. Therefore, in one embodiment of the switch device 100, when the operator is not pressing the operating part 141 of the stem 140, the switch device 100 is in the off state.

[0040] In one embodiment of the switch device 100, when an operator presses the operating portion 141 of the stem 140 by a predetermined first stroke amount, the stem 140 moves downward, and the lower surface of the pressing portion 143 of the stem 140 pushes down the central portion (i.e., the flat portion 131A) of the upper surface of the first movable contact member 130. As a result, the first movable contact member 130 elastically deforms into a concave shape (reversal movement), and the central portion of the back surface of the first movable contact member 130 comes into contact with the second movable contact member 150. Consequently, in one embodiment of the switch device 100, the four first peripheral fixed contacts 113A and the two first peripheral fixed contacts 113A become electrically connected to each other via the first movable contact member 130 and the second movable contact member 150, thereby entering the first switch-on state.

[0041] Furthermore, in one embodiment of the switch device 100, when an operator presses the operating portion 141 of the stem 140 by a predetermined second stroke amount (provided that the second stroke amount > the first stroke amount), the stem 140 moves further downward, and the lower surface of the pressing portion 143 of the stem 140 pushes down the central portion of the second movable contact member 150 via the central portion of the first movable contact member 130. As a result, the second movable contact member 150 elastically deforms into a concave shape (reversal movement), and the central portion of the back surface of the second movable contact member 150 comes into contact with the central fixed contact 112A. Consequently, in one embodiment of the switch device 100, the central fixed contact 112A and each of the two first peripheral fixed contacts 113A become electrically connected to each other via the second movable contact member 150, thereby entering a second switch-on state.

[0042] (Engagement configuration of hook 121) Figure 5 is a right side view of a switch device 100 according to one embodiment. Figure 6 is a partially enlarged view of the switch device 100 shown in Figure 5. Figure 7 is a plan view of the switch device 100 according to one embodiment. Figure 8 is a partially enlarged view of the switch device 100 shown in Figure 7. Figure 9 is a partially enlarged cross-sectional view of the switch device 100 according to one embodiment.

[0043] As shown in Figure 5, the opening 121A of the hook 121 on the right side (positive Y-axis side) of the cover member 120 has a lower edge portion 121C extending in the front-to-back direction (X-axis direction) below the opening 121A (negative Z-axis side).

[0044] Furthermore, as shown in Figure 5, the opening 121A of the hook 121 on the right side (positive Y-axis side) of the cover member 120 has a pair of side edges 121B extending vertically (Z-axis direction) on the front side (positive X-axis side) and rear side (negative X-axis side) of the opening 121A. That is, the pair of side edges 121B extend upward (positive Z-axis direction) from both ends of the lower edge 121C and face each other.

[0045] On the other hand, as shown in Figure 5, the projection 111 on the right side (positive Y-axis side) of the housing 110 is provided projecting to the right (positive Y-axis direction) from the right side (positive Y-axis side) of the housing 110.

[0046] Furthermore, as shown in Figure 5, the projection 111 on the right side (positive Y-axis side) has a rectangular shape when viewed from the right (positive Y-axis direction) with the front-to-back direction (X-axis direction) as the longitudinal direction and the up-to-down direction (Z-axis direction) as the short direction.

[0047] Then, as shown in Figure 5, with the cover member 120 superimposed on the upper surface 110A of the housing 110, the projection 111 is fitted into the opening 121A of the hook 121, thereby securing the hook 121 to the projection 111.

[0048] At this time, as shown in Figures 5 to 9, the lower edge 121C of the hook 121 comes into contact with the lower surface 111B of the projection 111, restricting the upward movement of the hook 121 (in the positive Z-axis direction). This makes the hook 121 more firmly engaged with the projection 111, preventing any vertical rattle (in the Z-axis direction) of the cover member 120 relative to the housing 110.

[0049] Furthermore, as shown in Figures 5 and 6, each of the pair of side edges 121B of the hook 121 comes into contact with each of the pair of side surfaces 111A (front side (positive X-axis side) 111A and rear side (negative X-axis side) 111A) of the projection 111. This restricts the movement of the hook 121 in the front-rear direction (X-axis direction), making the hook 121 more firmly engaged with the projection 111, and preventing rattling of the cover member 120 in the front-rear direction (X-axis direction) relative to the housing 110.

[0050] Here, as shown in Figure 5, as the projection 111 approaches the right side (positive Y-axis side) 110C of the housing 110, the distance between the pair of sides 111A increases, with each of the pair of sides 111A of the projection 111 being an inclined surface (an example of a "regulating portion").

[0051] In other words, the distance between the pair of sides 111A on the projection 111 is smallest at the position furthest from the right side (positive Y-axis side) 110C of the housing 110, and largest at the position closest to the right side (positive Y-axis side) 110C of the housing 110.

[0052] Furthermore, the maximum distance between the pair of side surfaces 111A on the projection 111 is greater than the distance between the pair of side edges 121B on the hook 121. Also, the minimum distance between the pair of side surfaces 111A on the projection 111 is smaller than the distance between the pair of side edges 121B on the hook 121.

[0053] Therefore, in one embodiment of the switch device 100, the projection 111 can be easily fitted into the opening 121A of the hook 121.

[0054] Furthermore, in one embodiment of the switch device 100, after fitting the projection 111 into the opening 121A of the hook 121, the gap between each of the pair of side edges 121B of the hook 121 and each of the pair of side surfaces 111A of the projection 111 can be gradually eliminated by pushing the hook 121 in the inward direction (negative Y-axis direction).

[0055] Furthermore, in one embodiment of the switch device 100, by pushing the hook 121 inward (negative Y-axis direction) to a predetermined position, each of the pair of side edges 121B of the hook 121 can be brought into contact with each of the pair of side surfaces 111A of the projection 111. In other words, the gap between each of the pair of side edges 121B of the hook 121 and each of the pair of side surfaces 111A of the projection 111 can be made zero.

[0056] Furthermore, in one embodiment of the switch device 100, by pushing the hook 121 further inward (negative Y-axis direction) from a predetermined position, each of the pair of side edges 121B of the hook 121 can be made to bite into each of the pair of side surfaces 111A of the projection 111.

[0057] Furthermore, as shown in Figures 5 to 9, the lower surface 111B of the projection 111 is inclined such that the height of the lower surface 111B of the projection 111 gradually decreases as it approaches the right side (positive Y-axis side) 110C of the housing 110.

[0058] Therefore, in the switch device 100 according to one embodiment, after fitting the projection 111 into the opening 121A of the hook 121, the gap between the lower edge 121C of the hook 121 and the lower surface 111B of the projection 111 can be gradually eliminated by pushing the hook 121 in the inward direction (negative Y-axis direction).

[0059] Furthermore, in one embodiment of the switch device 100, the lower edge portion 121C of the hook 121 can be brought into contact with the lower surface 111B of the projection portion 111 by pushing the hook 121 inward (negative Y-axis direction) to a predetermined position.

[0060] Furthermore, in one embodiment of the switch device 100, by pushing the hook 121 further inward (negative Y-axis direction) from a predetermined position, the lower edge 121C of the hook 121 can be embedded in the lower surface 111B of the projection 111, as shown in Figure 9.

[0061] In other words, in the switch device 100 according to one embodiment, since both the lower surface 111B and the pair of side surfaces 111A of the projection 111 are inclined surfaces, by pushing the hook 121 inward (negative Y-axis direction), the lower edge 121C and the pair of side edges 121B of the hook 121 can be made to bite into the lower surface 111B and the pair of side surfaces 111A of the projection 111.

[0062] As a result, the switch device 100 according to one embodiment can restrict the vertical (Z-axis direction) and front-to-back (X-axis direction) movement of the hook 121 relative to the projection 111, and therefore, virtually no vertical (Z-axis direction) and front-to-back (X-axis direction) rattle of the cover member 120 relative to the housing 110 can be prevented.

[0063] In addition, in the switch device 100 according to one embodiment, since the hook 121 is completely engaged with the projection 111, even if the engagement of the hook 121 with the projection 111 loosens slightly due to reflow heat, the amount of engagement decreases only slightly, so that there is almost no rattle of the cover member 120 relative to the housing 110.

[0064] On the other hand, in conventional switch devices, the side surface of the housing projection is not sloped, and a certain gap is intentionally provided between the side surface of the housing projection and the side edge of the hook. Therefore, if the engagement of the hook with the projection loosens slightly due to reflow heat, there is a risk that the cover member will become loose due to that gap.

[0065] Furthermore, since the switch device 100 according to one embodiment has a symmetrical structure, the engagement configuration between the hook 121 on the left side (negative Y-axis side) of the cover member 120 and the projection 111 on the left side (negative Y-axis side) of the housing 110 is the same as the engagement configuration between the hook 121 on the right side (positive Y-axis side) of the cover member 120 and the projection 111 on the right side (positive Y-axis side) of the housing 110.

[0066] Therefore, the switch device 100 according to one embodiment can restrict the movement of both the left and right hooks 121 of the cover member 120, thereby further reducing rattling of the cover member 120 relative to the housing 110.

[0067] Although one embodiment of the present invention has been described in detail above, the present invention is not limited to these embodiments, and various modifications or changes are possible within the scope of the gist of the present invention as described in the claims.

[0068] In the embodiments described, the present invention was applied to a switch device that can be switched on in two stages by a pressing operation, but it is not limited to this. That is, the present invention may be applied to other switch devices (for example, a switch device that can be switched on in one stage by a pressing operation).

[0069] Furthermore, in this embodiment, each of the pair of side surfaces 111A is an inclined surface, but the invention is not limited to this, and only one of the pair of side surfaces 111A may be an inclined surface.

[0070] Furthermore, in this embodiment, the entire side surface 111A is an inclined surface, but a portion of the side surface 111A may be an inclined surface.

[0071] Furthermore, in this embodiment, an "inclined surface" was used as an example of the "regulating part," but other configurations besides an "inclined surface" may be used as the "regulating part." [Explanation of Symbols]

[0072] 100 Switching device 110 Housing 110A top 110B Storage Unit 110C side 111 Protrusion 111A Side (regulating part, sloped surface) 111B Bottom side 112 Central fixed contact member 112A central fixed contact 112B External connection terminal 113 First peripheral fixed contact member 113A First peripheral fixed contact 113B External connection terminal 114 Second peripheral fixed contact member 114A Second peripheral fixed contact 114B External connection terminal 120 Cover component 120A opening 121 Hook 121A opening 121B Side edge 121C Lower edge 130 First movable contact member 131 Metal inverted dome 131A Flat part 132 Legs 140 Stem 141 Operation section 142 Base 143 Pressing part 150 Second movable contact member 151 Metal inverted dome 160 Insulating material

Claims

1. A housing having a housing section that houses a fixed contact and a movable contact inside, A movable contact member arranged in the housing portion, An operating member for pressing the movable contact member, A cover member that covers the base of the operating member and Equipped with, The aforementioned housing is The housing has a projection that protrudes from the side surface, The cover member is The cover member has a hook that hangs down from its edge, The aforementioned hook is It has an opening, and the projection fits into the opening, thereby engaging with the projection. The side surface of the aforementioned projection is The hook has a restricting portion that contacts the side edge of the opening of the hook, thereby restricting the movement of the hook. A switch device characterized by the following features.

2. The aforementioned regulatory body, The inclined surface is such that the distance between the pair of sides of the projection widens as it approaches the side of the housing. The switch device according to feature 1.

3. The aforementioned protrusion is The inclined surfaces are symmetrically provided on the pair of sides. The switch device according to feature 2.

4. The maximum distance between the pair of sides of the projection is Larger than the distance between the pair of side edges of the hook The switch device according to feature 3.

5. The cover member is The above housing is provided on top of the upper surface A switch device according to any one of claims 1 to 4.

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