JP2019125424A - Switching arrangement - Google Patents

Abstract

To obtain a switching arrangement using a membrane switch in which variation of force, required for turning on, is less in the depression direction.SOLUTION: A switching arrangement has a membrane switch, and a rubber dome installed on the membrane switch, where the membrane switch includes an upper sheet and a lower sheet placed via a spacer, and an upper contact provided on the upper sheet is facing a lower contact provided on the lower sheet. When pushing the upper part on the outside of the rubber dome, the rubber dome deforms and the lower part on the inside of the rubber dome comes into contact with the face on the outside of the upper sheet of the membrane switch, and the center of the lower part of the rubber dome is shifted to the side pushed obliquely for the center of the upper part of the rubber dome.SELECTED DRAWING: Figure 9

Description

  The present invention relates to a switch device.

  As a switch device, there is a two-stage switch having two switches. In this two-stage switch, when the pressing member pressing the switch is pressed, one switch is first turned on and the other switch is then turned on, so that the on / off operation can be performed in two steps. . Such two-stage switches are used in various applications, for example, switches for operating power windows.

Japanese Patent Laid-Open No. 2000-11807

  By the way, the above two-stage switch has two fixed contact parts on the surface of the substrate and a rubber dome provided so as to cover the two fixed contact parts and provided with a movable contact part on the inner side. doing. In the two-stage switch, the rubber dome is deformed to the substrate side by pushing the pressing member, and the movable contact provided on the inner side of the rubber dome comes in contact with two fixed contact parts provided on the surface of the substrate. The switch is closed and turned on. In a two-stage switch, two such switches are provided, and by providing an actuator between the pressing member and the two rubber domes, the two switches can be turned on at different timings. is there. That is, after one switch is turned on, the other switch can be turned on.

  When such a two-stage switch is used as a switch for operating a power window of an automobile, the manual operation mode is used to move the door glass up and down only during the on period of one of the switches, and then the other switch is turned on. When the door glass is turned off after that, it can be used properly as an auto mode in which the door glass is automatically operated to the closed position or the open position of the window.

  By the way, in such a two-stage switch, there is a high demand from the market for a structure using a membrane switch instead of a substrate provided with a fixed contact portion on the surface for thinning and weight reduction. In the case of such a switch device having a structure using a membrane switch, when the rubber dome in each switch is pressed diagonally, depending on the pressing direction, etc., the force required to completely turn on Variation may occur, and good operability may not be obtained.

  Therefore, in a switch device using a membrane switch, there is a demand for a switch device without variation in force required to be turned on depending on the direction of pressing or the like.

  According to one aspect of the present embodiment, the membrane switch and the rubber dome installed on the membrane switch are provided, and in the membrane switch, the upper sheet and the lower sheet are disposed via the spacer. The upper contact provided on the upper sheet and the lower contact provided on the lower sheet face each other, and the rubber dome is deformed by obliquely pressing the upper portion outside the rubber dome, The inner lower portion of the rubber dome is in contact with the outer surface of the upper sheet of the membrane switch, and the center of the lower portion of the rubber dome is diagonally pressed with respect to the center of the upper portion of the rubber dome. It is characterized in that it is shifted to the

  According to the disclosed switch device, in the switch device using the membrane switch, the variation in the force required to turn on the switch device can be reduced depending on the direction in which it is pressed.

An exploded perspective view of the switch device in the present embodiment A perspective view of the switch device in the present embodiment Structural drawing of the switch device in the present embodiment Sectional view (1) of switch device in the present embodiment Sectional view of switch device in the present embodiment (2) The perspective view of the rubber dome sheet | seat of the switch apparatus in this Embodiment An explanatory view of a membrane switch of a switch device in the present embodiment Illustration of rubber dome Explanatory drawing (1) of the rubber dome of the switch apparatus in this Embodiment Explanatory drawing (2) of the rubber dome of the switch apparatus in this Embodiment Explanatory drawing of the modification of the rubber dome of the switch apparatus in this Embodiment Explanatory drawing of the other membrane switch of the switch apparatus in this Embodiment

  A mode for carrying out will be described below. In addition, about the same member etc., the same code | symbol is attached | subjected and description is abbreviate | omitted. In the present application, the X1-X2 direction, the Y1-Y2 direction, and the Z1-Z2 direction are orthogonal to each other. Further, a plane including the X1-X2 direction and the Y1-Y2 direction is described as an XY plane, a plane including the Y1-Y2 direction and the Z1-Z2 direction is described as a YZ plane, and the Z1-Z2 direction and the X1-X2 direction are illustrated. The plane containing is described as ZX plane.

(2-stage switch)
The two-stage switch which is a switch device in the present embodiment will be described. 1 is an exploded perspective view of a two-stage switch which is a switch device in the present embodiment, FIG. 2 is a perspective view, FIG. 3 (a) is a side view, and FIG. 3 (b) is a top view It is. FIG. 4 is a cross-sectional view cut along dashed-dotted line 3A-3B in FIG. 3 (b), and FIG. 5 is a cross-sectional view cut along dashed-dotted line 3C-3D in FIG. 3 (b).

  The switch device in the present embodiment includes an operation unit 10, a support unit 20, two actuators 30A and 30B, a rubber dome sheet 40, a membrane switch 60, a lower case 80, and the like.

  The operation unit 10 is a portion for the operator to touch and operate the switch device in the present embodiment, and is formed by injection molding of a synthetic resin such as a heat resistant ABS resin (acrylonitrile styrene styrene copolymer). The operation unit 10 is formed in a box shape, and the upper surface of the operation unit 10 is an operation surface 11 pressed by the operator.

  The operation unit 10 is attached to the support unit 20 so as to be able to pivot around a central axis indicated by an alternate long and short dash line 1A in FIG. As a result, when the operation surface 11 of the operation unit 10 is pressed from above, that is, from the side in the Z1 direction by the operator's finger or the like, the operation unit 10 moves in the Z2 direction. Accordingly, as shown by the broken line arrow A in FIG. 3A, the operation unit 10 can be moved up and down.

  From the ceiling surface 12 on the back side of the operation surface 11, two protrusions 13a and 13b extending in the Z2 direction are formed inside the operation unit 10, as shown in FIGS. One of the two projections 13a and 13b corresponds to the actuator 30A, and the other projection 13b corresponds to the actuator 30B.

  The support portion 20 is formed by injection molding of synthetic resin such as heat resistant ABS resin. The support portion 20 is a portion supporting the operation portion 10 in the Z1 direction side, which is the upper portion, and the upper case 21 is the Z2 direction side, which is the lower portion. A convex portion is provided on the upper portion of the support portion 20 so as to face the inside of the wall surface extending in the Z1 direction, and this convex portion and an unshown inside of the operation portion 10 corresponding to the convex portion are provided. The operating unit 10 is rotatably supported by the engaging unit.

  The lower case 80 has a box-like shape, and is formed by injection molding using a synthetic resin such as a heat-resistant ABS resin, similarly to the support portion 20 in which the upper case 21 is provided. In the switch device according to the present embodiment, by connecting upper case 21 and lower case 80 in support portion 20, a box having a space inside is formed, and in this box, actuators 30A and 30B are provided. , A rubber dome sheet 40, a membrane switch 60 and the like are accommodated.

  The actuators 30A, 30B are formed by injection molding of a synthetic resin such as polyoxymethylene resin (POM: polyoxymethylene). Each of the actuators 30A and 30B has a rectangular, flat plate-like main body portion 31 and a pressing portion 32 provided on the Z2 direction side of the main body portion 31. Two convex portions 33 and 34 are provided on both sides in the X1-X2 direction on the bottom surface 32a on the Z2 direction side of the pressing portion 32 of the actuators 30A and 30B.

  The upper surface 35 on the Z1 direction side of the main body 31 of the actuators 30A, 30B is in contact with the protrusions 13a, 13b provided inside the operation unit 10 corresponding to the respective actuators 30A, 30B.

  Specifically, as shown in FIG. 4, the upper surface 35 on the Z1 direction side of the main body 31 of the actuator 30A is in contact with the projection 13a provided on the inside of the operation unit 10, and the projection 13a and Is in contact with the center of the upper surface 35 of the main body portion 31 in the X2 direction.

  Further, as shown in FIG. 5, the upper surface 35 on the Z1 direction side of the main body portion 31 of the actuator 30B is in contact with the projection 13b provided inside the operation portion 10, and the projection 13b is the main body The contact is in the X1 direction side with respect to the center of the upper surface 35 of the portion 31.

  The actuators 30A, 30B move in the Z1-Z2 direction with the operation of the operation unit 10. Specifically, the actuators 30A and 30B move in the Z2 direction by pushing the operation surface 11 of the operation unit 10. In the present embodiment, the operation is performed by shifting the position of the upper surface 35 of the main body 31 of the actuators 30A and 30B in contact with the protrusions 13a and 13b provided inside the operation unit 10 from the center of the upper surface 35. When the actuators 30A and 30B are pushed by the unit 10, each of the actuators 30A and 30B performs an operation in which it is tilted first.

  Next, the rubber dome sheet 40 will be described based on FIG. In the present embodiment, the rubber dome sheet 40 is formed of an elastic material such as synthetic rubber, and the four rubber domes 51A and 52A are provided on the substantially box-shaped base portion 41 so as to protrude in the Z1 direction. , 51B, 52B are formed. In the present embodiment, the rubber domes 51A and 51B may be described as a first rubber dome, and the rubber domes 52A and 52B may be described as a second rubber dome.

  The outer side of the first rubber domes 51A and 51B is formed with an upper portion 53a which is convex in the Z1 direction side, and a concave portion 53c is provided in the central portion of the upper surface 53b on the Z1 direction side of the upper portion 53a. Between the upper portion 53a and the base portion 41, a deformed portion 53d is formed which is deformed so that the upper portion 53a is buckled in the Z2 direction. Similarly, the outer side of the second rubber domes 52A and 52B is formed with an upper portion 54a which is convex in the Z1 direction side, and a concave portion 54c is provided in the central portion of the upper surface 54b on the Z1 direction side of the upper portion 54a. There is. Between the upper portion 54a and the base portion 41, a deformed portion 54d is formed which is deformed so that the upper portion 54a is buckled in the Z2 direction.

  Further, as shown in FIGS. 4 and 5, a lower portion 53e which is convex in the Z2 direction is formed inside the first rubber domes 51A and 51B. The shape of the pressing surface 55 on the Z2 direction side of the lower portion 53e may be a hemispherical spherical surface or an aspherical surface. Similarly, a lower portion 54e which is convex in the Z2 direction is formed inside the second rubber domes 52A and 52B. The shape of the pressing surface 56 on the Z2 direction side of the lower portion 53e may be a hemispherical spherical surface or an aspherical surface.

  The first rubber dome 51A and the second rubber dome 52A correspond to the actuator 30A, and the convex portion 33 provided on the pressing portion 32 of the actuator 30A is in the concave portion 53c of the first rubber dome 51A. The protrusion 34 is in the recess 54c of the second rubber dome 52A. In this state, the bottom surface 32a of the depressed portion 32 of the actuator 30A is in contact with the top surface 53b of the first rubber dome 51A and the top surface 54b of the second rubber dome 52A.

  The first rubber dome 51B and the second rubber dome 52B correspond to the actuator 30B, and the convex portion 33 provided on the pressing portion 32 of the actuator 30B is in the concave portion 53c of the first rubber dome 51B. The protrusion 34 is in the recess 54c of the second rubber dome 52B. In this state, the bottom surface 32a of the depressed portion 32 of the actuator 30B is in contact with the top surface 53b of the first rubber dome 51B and the top surface 54b of the second rubber dome 52B.

  Next, the membrane switch 60 will be described based on FIG. 7 (a) is an enlarged view of a cross-sectional view of the membrane switch 60 cut along the dashed dotted line 3A-3B in FIG. 3 (b), and FIG. 7 (b) is a dashed dotted line 3C- in FIG. 3 (b). It is an enlarged view of a sectional view of membrane switch 60 cut in 3D.

  In the present embodiment, in the membrane switch 60, the upper sheet 61 and the lower sheet 62 are attached via the spacer 63. In the upper sheet 61, first upper contacts 71A, 71B and second upper contacts 72A, 72B are formed of a conductive material. Further, on the lower sheet 62, first lower contacts 73A, 73B and second lower contacts 74A, 74B are formed of a conductive material. In the upper sheet 61 and the lower sheet 62, the first upper contact 71A and the first lower contact 73A face each other, the first upper contact 71B and the first lower contact 73B face each other, and the second upper face The contact point 72A and the second lower contact point 74A face each other, and the second upper contact point 72B and the second lower contact point 74B face each other.

  The spacer 63 has an opening in a region where the first upper contact 71A and the first lower contact 73A are formed and in a region where the first upper contact 71B and the first lower contact 73B are formed. The portion 63a is formed to be a space. In the region where the second upper contact 72A and the second lower contact 74A are formed, and in the region where the second upper contact 72B and the second lower contact 74B are formed, an opening 63b is formed. It is formed and becomes a space.

  The membrane switch 60 bends the upper sheet 61 by pressing the surface opposite to the surface on which the first upper contact 71A of the upper sheet 61 is formed, and the first upper contact 71A and the first lower contact 73A contacts and turns on. Further, by pressing the surface opposite to the surface on which the first upper contact 71B of the upper sheet 61 is formed, the upper sheet 61 is bent and the first upper contact 71B and the first lower contact 73B are bent. Contact and turn on. Further, by pressing the surface opposite to the surface on which the second upper contact 72A of the upper sheet 61 is formed, the upper sheet 61 is bent and the second upper contact 72A and the second lower contact 74A are bent. Contact and turn on. Further, by pressing the surface opposite to the surface on which the second upper contact 72B of the upper sheet 61 is formed, the upper sheet 61 is bent and the second upper contact 72B and the second lower contact 74B are bent. Contact and turn on.

  In the switch device according to the present embodiment, the first upper contact 71A and the first lower contact 73A of the membrane switch 60, the first upper contact 71B and the first lower contact 73B, the second upper contact 72A and the first The two lower contacts 74A, the second upper contacts 72B and the second lower contacts 74B are provided at positions corresponding to the four rubber domes 51A, 51B, 52A, 52B provided on the rubber dome sheet 40. There is. That is, the rubber dome sheet 40 is installed at a predetermined position above the membrane switch 60.

  Specifically, the first upper contact 71A (an example of one upper contact) and the first lower contact 73A (an example of one lower contact) are the first rubber domes 51A of the rubber dome sheet 40 (two The second upper contact 72A (an example of the other upper contact) and the second lower contact 74A (an example of the other lower contact), which are disposed at positions corresponding to one example of the rubber dome, are rubber domes It is arrange | positioned in the position corresponding to the 2nd rubber dome 52A (an example of the other of two rubber domes) of the sheet | seat 40. As shown in FIG. In addition, the first upper contact 71B (one example of the upper contact) and the first lower contact 73B (one example of the lower contact) are the first rubber domes 51B (two rubber domes) of the rubber dome sheet 40. The second upper contact 72B (an example of the other upper contact) and the second lower contact 74B (an example of the other lower contact), which are disposed at positions corresponding to one example) It is arrange | positioned in the position corresponding to 2nd rubber dome 52B (an example of the other of two rubber domes).

  Therefore, the first upper contact 71A and the first lower contact 73A form a first switch that is pressed by the pressing surface 55 of the lower portion 53e of the first rubber dome 51A. Further, the second upper contact 72A and the second lower contact 74A form a second switch that is pressed by the pressing surface 56 of the lower portion 54e of the second rubber dome 52A. Such a first switch pressed by the first rubber dome 51A and a second switch pressed by the second rubber dome 52A are operated by the actuator 30A.

  In addition, the first upper contact 71B and the first lower contact 73B form a first switch that is pressed by the pressing surface 55 of the lower portion 53e of the first rubber dome 51B. The second upper contact 72B and the second lower contact 74B form a second switch that is pressed by the pressing surface 56 of the lower portion 54e of the second rubber dome 52B. Such a first switch pushed by the first rubber dome 51B and a second switch pushed by the second rubber dome 52B are operated by the actuator 30B.

  Specifically, by pushing the operation surface 11 of the operation unit 10 downward, that is, in the Z2 direction, the operation unit 10 moves in the Z2 direction, and one protrusion 13 a provided inside the operation unit 10 The upper surface 35 of the actuator 30A is pushed, and the upper surface 35 of the actuator 30B is pushed by the other protrusion 13b.

  As described above, when the upper surface 35 of the actuator 30A is pressed by the one protrusion 13a provided on the inner side of the operation unit 10, the actuator 30A is tilted. Thereby, first, the convex portion 33 of the depressed portion 32 of the actuator 30A pushes the first rubber dome 51A which has entered the concave portion 53c, and the deformation portion 53d of the first rubber dome 51A is deformed, and the first rubber The depressed surface 55 of the lower portion 53e of the dome 51A pushes the surface of the upper sheet 61 opposite to the area where the first upper contact 71A is formed, and the first upper contact 71A and the first lower contact 73A Contact and electrically connected, the first switch is turned on.

  In this state, by further pressing the operation surface 11 of the operation unit 10 downward, that is, in the Z2 direction, the actuator 30A moves, and the convex portion 34 of the pressing portion 32 of the actuator 30A enters the recess 54c. The second rubber dome 52A is pushed, the deformation portion 54d of the second rubber dome 52A is deformed, and the pressed surface 56 of the lower portion 54e of the second rubber dome 52A is formed with the second upper contact 72A of the upper sheet 61 The second upper contact 72A and the second lower contact 74A are in contact and electrically connected, and the second switch is turned on.

  Similarly, when the upper surface 35 of the actuator 30B is pressed by the other protrusion 13b provided inside the operation unit 10, the actuator 30B is tilted. Thereby, first, the convex portion 33 of the depressed portion 32 of the actuator 30B pushes the first rubber dome 51B which has entered the concave portion 53c, and the deformation portion 53d of the first rubber dome 51B is deformed, and the first rubber The depressed surface 55 of the lower portion 53e of the dome 51B pushes the surface of the upper sheet 61 opposite to the area where the first upper contact 71B is formed, and the first upper contact 71B and the first lower contact 73B Contact and electrically connected, the first switch is turned on.

  In this state, when the operation surface 11 of the operation unit 10 is further pushed downward, that is, in the Z2 direction side, the actuator 30B moves, and the convex portion 34 of the pressed portion 32 of the actuator 30B enters the concave portion 54c. The second rubber dome 52B is pushed, the deformed portion 54d of the second rubber dome 52B is deformed, and the pressed surface 56 of the lower portion 54e of the second rubber dome 52B is formed with the second upper contact 72B of the upper sheet 61 The second upper contact 72B and the second lower contact 74B are in contact and electrically connected, and the second switch is turned on.

  Therefore, in the switch device according to the present embodiment, the first switch is first turned on by pushing the operation surface 11 of the operation unit 10 downward, that is, in the Z2 direction. In this state, the second switch remains off. Thereafter, by pushing the operation surface 11 of the operation unit 10 downward, the second switch is turned on, and both the first switch and the second switch are turned on.

(Rubber dome)
As described above, in the two-stage switch, the rubber dome is deformed by the rubber dome being pushed diagonally by the actuator 30A or 30B, and the pressed surface of the lower part of the rubber dome pushes the upper sheet 61 of the membrane switch from above , And the upper sheet 61 is bent, and the upper contact and the lower contact are turned on by contact. In the following description, the first upper contact 71A and the first upper contact 71B are used as the first upper contact 71, and the second upper contact 72A and the second upper contact 72B are used as the second upper contact 72. The first lower contact 73A and the first lower contact 73B will be described as a first lower contact 73, and the second lower contact 74A and the second lower contact 74B as a second lower contact 74.

  By the way, as shown in FIG. 8, a case is considered where the center of the concave portion 950c of the upper portion 950a of the rubber dome 950 matches the center of the convex lower portion 950e. In this case, when the upper portion 950a of the rubber dome 950 is pressed obliquely from the direction shown by the broken arrow B by the pressing portion 32 such as the actuator 30A, as shown in FIG. 8B, the lower portion 950e of the rubber dome 950 is pressed. The lower surface 955 comes in contact with the upper sheet 61 of the membrane switch 60 and pushes the upper sheet 61. At this time, since the upper portion 950a of the rubber dome 950 is pushed obliquely from the direction shown by the broken arrow B, the lower portion 950e of the rubber dome 950 is a surface opposite to the center 71a of the first upper contact 71 of the upper sheet 61. The position 61b shifted from the position 61a of is pressed.

  Ideally, the membrane switch 60 is preferably pressed at a position 61a opposite to the center 71a of the first upper contact 71 of the upper sheet 61, in which case the upper sheet 61 is pressed with a desired force. The first switch can be turned on by bringing the first upper contact 71 of the upper sheet 61 into contact with the first lower contact 73 of the lower sheet 62.

  However, when the upper portion 950 a of the rubber dome 950 is pressed in a diagonal direction, the position where the pressing surface 955 of the lower portion 950 e of the rubber dome 950 presses the membrane switch is the opposite side of the center 71 a of the first upper contact 71 of the upper sheet 61. The position 61b deviates from the position 61a of In this case, the upper sheet 61 may not be sufficiently bent even when pressed by a desired force, and the first switch may not be able to be turned on. Therefore, to turn on the first switch, it is necessary to press with a stronger force, but it depends on the contact position between the pressing surface 955 of the lower portion 950 e of the rubber dome 950 and the upper sheet 61 of the membrane switch 60. Depending on the amount of displacement of the displaced position 61b, variations occur in the force required to turn on the first switch. Therefore, even if the operating person presses the operating portion of the switch device with the same force, depending on the way and direction of pressing, the case of turning on and the case of not turning on may occur, and variations are likely to occur.

(Rubber dome in the present embodiment)
Next, the rubber dome of the switch device in the present embodiment will be described. As shown in FIG. 9, the pressing surface 55 of the lower portion 53 e of the first rubber dome 51 of the switch device in the present embodiment is hemispherical spherical or aspheric, and the pressing surface 55 of the lower portion 53 e is The center 55a is offset from the center 53f of the recess 53c of the upper portion 53a. Specifically, the center 55a of the depressed surface 55 of the lower portion 53e is the side in the direction in which the first rubber dome 51 is pushed, ie, the side in the pushing direction as shown by the dashed arrow B, with respect to the center 53f of the recess 53c. Formed on the side of the X1 direction. FIG. 9 is a cross-sectional view of the first rubber dome 51 in the ZX plane. In FIG. 9, the first rubber domes 51A and 51B will be described as the first rubber dome 51.

  Therefore, when the upper portion 53a of the first rubber dome 51 is diagonally pressed by the pressing portion 32 of the actuator 30A or the like from the direction shown by the broken arrow B, as shown in FIG. 9B, the first rubber dome 51 The pressing surface 55 of the lower portion 53e of the lower layer 53 contacts the upper sheet 61 of the membrane switch 60. In the switch device according to the present embodiment, the center 55a of the depressed surface 55 of the lower portion 53e of the first rubber dome 51 is the depressed side indicated by the broken line arrow B than the center 53f of the recess 53c of the upper portion 53a. The upper surface 53a of the first rubber dome 51 is pushed from the direction shown by the broken arrow B, so that the pressed surface 55 of the lower portion 53e of the first rubber dome 51 is formed to be the side of the X1 direction. The position close to the position 61a of the surface opposite to the center 71a of the first upper contact 71 of the upper sheet 61 of the membrane switch 60 is pushed. For this reason, the first upper contact 71 and the first lower contact 73 contact in the vicinity of the center 71 a of the first upper contact 71, so the operator presses the switch of the switch device with a desired force. Can be turned on to prevent variations from occurring.

  Further, although the first rubber dome 51 has been described above, the second rubber dome 52 may be formed in the same manner. FIG. 10 is a cross-sectional view of the second rubber dome 52 in the ZX plane. In FIG. 10, the second rubber domes 52A and 52B will be described as the second rubber dome 52.

  In the switch device according to the present embodiment, the second rubber dome 52 is pushed in the direction indicated by the broken line arrow C, but the center 56a of the pressing surface 56 of the lower portion 54e of the second rubber dome 52 is a recess in the upper portion 54a. It is formed to be the side of the pushing direction shown by the broken line arrow C, that is, the side in the X2 direction, than the center 54f of the 54c.

  Therefore, when the upper portion 54a of the second rubber dome 52 is diagonally pushed from the direction shown by the broken line arrow C by the pressing portion 32 of the actuator 30A or the like, as shown in FIG. 10 (b), the second rubber dome 52 The pressing surface 56 of the lower portion 54e of the lower layer 54 contacts the upper sheet 61 of the membrane switch 60. In the switch device according to the present embodiment, the center 56a of the depressed surface 56 of the lower portion 54e of the second rubber dome 52 is the side of the depressed direction C indicated by the dashed arrow C with respect to the center 54f of the recess 54c of the upper portion 54a. The upper surface 54a of the second rubber dome 52 is pushed when the upper portion 54a of the second rubber dome 52 is pushed from the direction shown by the broken arrow C because the X2 direction side is formed. And pushing near the position 61c of the surface opposite to the center 72a of the second upper contact 72 of the upper sheet 61 of the membrane switch 60. For this reason, the second upper contact 72 and the second lower contact 74 contact in the vicinity of the center 72a of the second upper contact 72, so that the operator pushes the operation portion of the switch device with a desired force. Can be turned on to prevent variations from occurring.

  Further, as shown in FIG. 11, in the rubber dome of the switch device according to the present embodiment, the lower portion 53e of the first rubber dome 51 is a columnar portion 53g from the upper portion 53a toward the Z2 direction; It may be formed by a curved surface portion 53h which becomes the pressing surface 56 of the end on the Z2 direction side of 53g.

  Further, as shown in FIG. 12, the membrane switch may have a structure in which the lower sheet 62 is provided with one lower contact 73a and the other lower contact 73b. In the membrane switch of this structure, when the upper sheet 61 is pushed, both the first upper contact 71 of the upper sheet 61 and one lower contact 73a and the other lower contact 73b of the lower sheet 62 are in contact with each other. As a result, one lower contact 73 a and the other lower contact 73 b are electrically connected via the first upper contact 71 and turned on.

  As mentioned above, although an embodiment was explained in full detail, it is not limited to a specific embodiment, and various modification and change are possible within the limits indicated in a claim.

DESCRIPTION OF SYMBOLS 10 operation part 11 operation surface 12 ceiling surface 13a, 13b projection part 20 support part 21 upper case 30A, 30B actuator 31 main body part 32 pressing part 32a bottom face 33, 34 convex part 35 upper surface 40 rubber dome sheet 41 base part 51A, 51B rubber Dome (first rubber dome)
52A, 52B rubber dome (the second rubber dome)
53a, 54a upper portion 53b, 54b upper surface 53c, 54c recessed portion 53d, 54d deformed portion 53e, 54e lower portion 53f, 54f recessed portion center 55, 56 depressed surface 55a, 56a depressed surface curved surface 60 membrane switch 61 upper sheet 62 lower sheet 63 spacer 71A, 71B first upper contact 72A, 72B second upper contact 73A, 73B first lower contact 74A, 74B second lower contact 80 lower case

Claims (4)

Membrane switch,
A rubber dome installed on the membrane switch;
Have
In the membrane switch, an upper sheet and a lower sheet are disposed with a spacer in between, and an upper contact provided on the upper sheet and a lower contact provided on the lower sheet are opposed to each other.
By pushing the upper portion of the outer side of the rubber dome diagonally, the rubber dome is deformed so that the lower portion of the inner side of the rubber dome contacts the outer surface of the upper sheet of the membrane switch,
The switch device characterized in that the center of the lower portion of the rubber dome is offset to the side pressed diagonally with respect to the center of the upper portion of the rubber dome.   The switch device according to claim 1, wherein a lower portion of the rubber dome is a hemispherical spherical surface or an aspheric surface. Operation unit,
An actuator that operates by pressing the operation unit;
Have
The switch device according to claim 1, wherein the actuator pushes the upper portion of the rubber dome diagonally by pushing the operation unit. Two rubber domes are provided,
By pushing the operating part, one of the two rubber domes is pushed by the actuator, and the lower part of one of the two rubber domes pushes the upper sheet of the membrane switch, and the corresponding one The upper contact and one lower contact make contact,
With the one upper contact and the one lower contact in contact, the other of the two rubber domes is pushed by the actuator, and the other lower part of the two rubber domes is the membrane switch The switch device according to claim 3, characterized in that the upper sheet of (1) is pressed, and the corresponding other upper contact and the other lower contact are in contact with each other.

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