JP6132341B2 - Movable contact member and switch device using movable contact member - Google Patents

Description

  The present invention relates to a movable contact member and a switch device using the movable contact member, and more particularly, to a movable contact member that can hardly cope with an overstroke and that can handle an overstroke, and a switch device using the movable contact member. .

  There is a demand for a switch device used in electrical equipment that can perform reliable switching and has a clear operational feeling. As such a switch device, a switch device corresponding to an overstroke is often used. In a switch device that does not support overstroke, after the movable contact member is pressed and reversed, the movable contact member and the fixed contact portion come into contact with each other after an operation feeling is generated. Switching is performed. In the switch device corresponding to the overstroke, the movable contact member is pressed and the movable contact member and the fixed contact portion come into contact with each other before the reversing operation is performed, so that electrical switching is performed. Thereafter, by further pressing the movable contact member, the movable contact member performs a reverse operation (generates an operation feeling). By adopting such a structure, the movable contact member and the fixed contact portion are brought into contact with each other for a longer time, so that reliable switching can be performed and a clear operation feeling can be obtained. Note that a switch device that is configured to generate an operational feeling after electrical switching is assumed to be a switch device that supports overstroke. As a switch device corresponding to such an overstroke, a switch device described in Patent Document 1 below and a movable contact member used in the switch device are known.

  Hereinafter, the switch device described in Patent Document 1 will be described with reference to FIG. 12A and 12B are views showing the appearance of the switch device 900 described in Patent Document 1, FIG. 12A is a plan view showing the appearance of the switch device 900, and FIG. FIG.

  The switch device 900 described in Patent Literature 1 includes a thin plate (movable contact member) 903 formed in a dome shape and an insulating substrate 902 on which an electric circuit is formed. In the thin plate 903, four leg portions 915 (915a, 915b, 915c, 915d) protruding outward from the outer peripheral end portion are arranged at equal intervals. The lengths of the leg portions 915a and 915d arranged opposite to each other are the same, and the lengths of the leg portions 915b and leg portions 915c arranged similarly to each other are the same. However, the length of the leg part 915a and the leg part 915d is formed longer than the length of the leg part 915b and the leg part 915c.

  The insulating substrate 902 includes a conductive zone 906 having a first fixed contact portion 906a, a second fixed contact portion 906b, and a third fixed contact portion 906c, and a conductive zone 907 having a fourth fixed contact portion 907d. It is formed as an electric circuit on the surface. The first fixed contact portion 906a, the second fixed contact portion 906b, the third fixed contact portion 906c, and the fourth fixed contact portion 907d are spaced apart from each other and are electrically insulated from each other. Further, the first fixed contact portion 906a, the second fixed contact portion 906b, the third fixed contact portion 906c, and the fourth fixed contact portion 907d are arranged on the same circle, and the second fixed contact portion 906b and the third fixed contact portion 906b are arranged on the same circle. The fixed contact portion 906c is disposed at a position facing the fixed contact portion 906c, and the first fixed contact portion 906a and the fourth fixed contact portion 907d are disposed at a position facing each other. Further, the straight line connecting the second fixed contact portion 906b and the third fixed contact portion 906c and the straight line connecting the first fixed contact portion 906a and the fourth fixed contact portion 907d are orthogonal to each other.

  The thin plate 903 is disposed on the insulating substrate 902, and when not operated, the leg portion 915a is disposed in contact with the first fixed contact portion 906a, and the leg portion 915d is disposed in contact with the fourth fixed contact portion 907d. The first fixed contact portion 906a and the fourth fixed contact portion 907d are electrically connected via a thin plate 903. In addition, since the leg part 915a and the leg part 915d are longer than the length of the leg part 915b and the leg part 915c, the leg part 915c is spaced apart above the third fixed contact part 906c and the leg part 915b. Is spaced above the second fixed contact portion 906b. Hereinafter, the leg 915b and the leg 915c are referred to as a movable leg, and the leg 915a and the leg 915d are referred to as a fixed leg.

  When the driving member 904 is used to press the thin plate 903 from above, the thin plate 903 is bent downward, and the thin plate 903 is bent downward, so that the leg portion 915c comes into contact with the third fixed contact portion 906c, and the leg portion 915b contacts the second fixed contact portion 906b. As a result, a new electrical connection can be obtained and output via the thin plate 903. Thus, after the new electrical connection is obtained, the thin plate 903 can be further pressed, and when the pressing operation is further performed, the thin plate 903 performs the reversing operation, and the operator is given the instantaneous operating force at the time of reversing. Changes can be conveyed as operational feeling. That is, it is possible to cope with an overstroke.

JP 2001-67989 A

  As described above, in the switch device 900 described in Patent Document 1, the thin plate 903 is pressed by the thin plate 903 from the state where the thin plate 903 is supported by the leg portion 915a and the leg portion 915d, and the leg portion 915a, the leg portion 915b, the leg portion 915c, and the like. In this structure, switching is performed by supporting the leg portion 915d. Therefore, in order to delay the switching timing, it is necessary to increase the difference between the length of the fixed leg portion and the length of the movable leg portion. If this difference in length becomes large, the thin plate 903 is inclined during the pressing operation, and the bending state of each leg portion 915 is different, and there is a concern that the operation feeling when performing the switching operation varies.

  The present invention solves the above-described problems, and provides a movable contact member and a switch device using the movable contact member that are difficult to vary in operation feeling and can cope with an overstroke.

The movable contact member according to claim 1, a dome portion formed to bulge, a leg portion provided on an outer edge portion of the dome portion to support the dome portion, and a contact portion movable according to an operation. And a movable contact member that is reversed by pressing from the bulging direction having an opening disposed at a central position of the dome portion in a plan view from the bulging direction , while being arranged in a central position of the opening in a plan view from a direction of the bulge, inwardly of the front Symbol dome portion protrudes, by the extension issued deflection deformable coupling portion from the dome portion inwardly The contact portion and the dome portion are connected to each other .

The movable contact member according to claim 2 is characterized in that the dome portion is inverted .

The movable contact member according to claim 3 is characterized in that when pressed downward, the contact portion descends to the same height as the leg portion without reversing the dome portion .

In the switch apparatus using the movable contact member according to claim 4, the substrate including the movable contact member according to claim 1, and a fixed contact portion that can be electrically connected to the movable contact member. And after the movable contact member is pressed and the contact portion contacts the fixed contact portion and is electrically connected, the dome portion and the movable contact member are further pressed. The connecting portion is bent and the dome portion is inverted .

According to the invention of claim 1, the leg portion is specialized in the function of holding the dome portion, so that the dome portion can be stably held even when the length of the leg portion is increased. Difficult to produce operational feeling due to tilt of Further, the contact portion is provided at a central position of the dome portion, is formed so as to protrude inward of the dome portion, and is connected to the contact portion and the dome portion by a flexibly deformable connecting portion extending inward from the dome portion. When the movable contact member is pressed, the connecting portion and the dome portion are bent after the contact portion comes into contact with each other, and the dome portion is inverted, so that it is possible to cope with an overstroke. Therefore, there is an effect that it is possible to provide a movable contact member that is difficult to vary in operation feeling and can cope with an overstroke.

According to the second aspect, there is an effect that an operation feeling for the operator can be generated by inverting the dome portion.

According to the invention of claim 3, when pressed downward, the dome portion does not reverse, and the contact portion descends to the same height as the leg portion, thereby generating an operational feeling after performing electrical switching. The effect that it can be made.

  According to the fourth aspect of the present invention, there is an effect that it is possible to provide a switch device that is less likely to vary in operation feeling and can cope with an overstroke.

  As described above, according to the present invention, it is possible to provide a movable contact member that can hardly cope with an overstroke and that can handle an overstroke, and a switch device using the movable contact member.

It is a schematic diagram which shows the external appearance of the switch apparatus 100 in this embodiment. It is a schematic cross section which shows the structure of the switch apparatus 100 in this embodiment. It is a figure which shows the general view of the movable contact member 1 in this embodiment. It is a figure which shows the external appearance of the board | substrate 2 and the fixed contact part 3 in this embodiment. It is a figure which shows the external appearance of the drive body 4 in this embodiment. It is a figure which shows the external appearance of the holding sheet 5 in this embodiment. FIG. 4 is a schematic cross-sectional view showing the switch device 100 in a state where the driving body 4 is pressed and the contact portion 1c and the second fixed contact portion 3b are in contact with each other. FIG. 8 is a schematic cross-sectional view showing the switch device 100 in a state where the drive body 4 is further pressed from the state shown in FIG. 7 and the dome 1 a is inverted. It is a top view which shows one of the modifications of the movable contact member 1 in this embodiment. It is a top view which shows one of the modifications of the movable contact member 1 in this embodiment. It is a top view which shows one of the modifications of the movable contact member 1 in this embodiment. It is a figure which shows the external appearance of the switch apparatus 900 of patent document 1. FIG.

[First Embodiment]
Below, the switch apparatus 100 using the movable contact member 1 in this embodiment is demonstrated.

  First, the configuration of the switch device 100 according to the present embodiment will be described with reference to FIGS. FIG. 1 is a schematic diagram showing an appearance of the switch device 100 according to the present embodiment. FIG. 2 is a schematic cross-sectional view showing the configuration of the switch device 100 in the present embodiment. In FIG. 2, there are some parts different from the actual shape and cross section for easy explanation. FIG. 3 is a view showing the appearance of the movable contact member 1 in the present embodiment, and FIG. 3A is a plan view showing the appearance of the movable contact member 1 in a state viewed from the Z1 direction side shown in FIG. FIG.3 (b) is sectional drawing which shows the cross section AA shown to Fig.3 (a). In addition, in FIG.3 (b), in order to demonstrate easily, the cross section of the connection part 1e is also shown typically. FIG. 4 is a view showing the appearance of the substrate 2 and the fixed contact portion 3 in the present embodiment, FIG. 4A is a plan view showing the appearance of the substrate 2 and the fixed contact portion 3, and FIG. It is a side view which shows the external appearance of the board | substrate 2 of the state seen from the X2 direction side shown to Fig.4 (a), and the fixed contact part 3. FIG. FIG. 5 is a view showing the appearance of the drive body 4 in the present embodiment, FIG. 5 (a) is a plan view showing the appearance of the drive body 4, and FIG. 5 (b) is Y2 shown in FIG. 5 (a). It is a side view which shows the external appearance of the drive body 4 of the state seen from the direction side. FIG. 6 is a view showing the appearance of the holding sheet 5 in the present embodiment, FIG. 6 (a) is a plan view showing the appearance of the holding sheet 5, and FIG. 6 (b) is a cross section shown in FIG. 6 (a). It is sectional drawing which shows BB.

  As shown in FIG. 2, the switch device 100 includes a movable contact member 1 having elasticity and conductivity, a substrate 2 having a fixed contact portion 3 that can be electrically connected to the movable contact member 1, and the movable contact member 1. Drive member 4 that presses, holding sheet 5 that holds movable contact member 1 on substrate 2, and cover member 6.

  The movable contact member 1 is made of a metal plate having elasticity and conductivity. As shown in FIG. 3, the movable contact member 1 supports the dome portion 1a provided at the outer edge portion of the dome portion 1a formed by bulging and the dome portion 1a. It has the leg part 1b and the contact part 1c which can move according to operation.

  The dome 1a is circular in a plan view from the bulging direction (Z1 direction), and has an opening 1d at the top. An outer portion 1g of the opening 1d, which is a boundary between the opening 1d and the dome 1a, has an arc shape similar to the circular shape of the dome 1a.

  Four leg portions 1b are formed extending outward from the outer extension portion of the dome portion 1a. Two pairs of leg portions 1b arranged at a predetermined interval form a pair. In the present embodiment, the predetermined interval is defined by the distance dimension between the tips of the leg portions 1b (DS shown in FIG. 3), and it is desirable that the predetermined interval be less than the diameter of the dome portion 1a. The interval is substantially the same as the diameter of the dome 1a. Further, the tip of the leg 1b is located on a virtual same circle having the same center as the center of the outer shape of the dome 1a (point CP shown in FIG. 3) when the movable contact member 1 is viewed in plan from the Z1 direction side. The pair of leg portions 1b are arranged at point-symmetric positions.

  The contact portion 1c is disposed at the center position of the opening portion 1d in a plan view from the direction in which the dome portion 1a swells, and is connected to the dome portion 1a by a connecting portion 1e that can be flexibly deformed. Projecting in the direction (Z2 direction). That is, the contact part 1c is located below (Z2 direction side) the top of the head where the opening 1d of the dome part 1a is formed. The connecting portion 1e is composed of a plurality of arm portions 1f formed in a bar shape. In the present embodiment, three arm portions 1f are arranged at equal intervals around the contact portion 1c, and are formed to extend radially.

  The substrate 2 is a rigid substrate (paper phenol substrate), and is formed in a rectangular flat plate shape as shown in FIG. A fixed contact portion 3 is formed on the upper surface of the substrate 2 by printing and baking conductive ink. The fixed contact portion 3 is formed at the center position of the first fixed contact portion 3a formed in an annular shape and contactable with the leg portion 1b of the movable contact member 1, and the first fixed contact portion 3a formed in an annular shape, A second fixed contact portion 3b that can come into contact with the contact portion 1c of the movable contact member 1; The first fixed contact portion 3a and the second fixed contact portion 3b are insulated and connected to external connection terminals 3c that can be electrically connected to the outside.

  The drive body 4 is made of a synthetic resin material, and as shown in FIG. 5, protrudes upward to the center of the base portion 4a formed in a disc shape and the upper surface (surface on the Z1 direction side) of the base portion 4a, and is cylindrical. And a pressing portion 4c formed in a columnar shape at a position (center of the lower surface) facing the operating portion 4b across the base portion 4a. The diameter of the pressing portion 4 c formed in a columnar shape is larger than the diameter of the opening 1 d of the movable contact member 1.

  The holding sheet 5 is made of a synthetic resin material, and as shown in FIG. 6, has a sheet portion 5 a that is flexible and formed in a rectangular sheet shape, and the sheet portion 5 a covers the movable contact member 1. It is formed in a possible size. Further, the holding sheet 5 has an adhesive layer 5b made of an adhesive on one surface (surface on the Z2 direction side) of the sheet portion 5a. However, a non-adhesive portion 5 c to which no adhesive is applied is formed at the center of one surface of the holding sheet 5. The non-adhesive portion 5 c is formed in the same size and shape as the opening 1 d of the movable contact member 1.

  The cover member 6 is made of a metal plate and, as shown in FIGS. 1 and 2, is formed in a rectangular parallelepiped box shape that is hollow and opens downward (on the Z2 direction side). The cover member 6 has a top surface portion 6a formed in a rectangular flat plate shape, and an insertion hole 6b into which the operation portion 4b of the driver 4 can be inserted is formed in the top surface portion 6a. Side walls 6c are formed on the four sides of the top surface portion 6a so as to extend downward (Z2 direction) continuously to the top surface portion 6a.

  Next, the structure of the switch device 100 will be described with reference to FIG.

  As shown in FIG. 2, the movable contact member 1 is disposed on the substrate 2 such that the leg portions 1b are in contact with the first fixed contact portions 3a. A holding sheet 5 is disposed so as to overlap the movable contact member 1. The holding sheet 5 is disposed so that the adhesive layer 5 b is in contact with the movable contact member 1, and the non-adhesive portion 5 c is disposed on the movable contact member 1. It is arranged to face the opening 1d. The holding sheet 5 arranged in this manner adheres to the movable contact member 1 and adheres to the substrate 2, whereby the movable contact member 1 is locked onto the substrate 2. In addition, since the holding sheet 5 has flexibility, the movable contact member 1 is engaged with the holding sheet 5 so as to be deformable in the vertical direction (Z1-Z2 direction). The driving body 4 is disposed so as to overlap the holding sheet 5 so that the pressing portion 4 c faces the opening 1 d (contact portion 1 c) of the movable contact member 1. Further, the operation portion 4b of the driving body 4 is disposed by being inserted into the insertion hole 6b of the cover member 6 from the side where the side wall 6c is extended, and the cover member 6 is a substrate so that the side wall 6c contacts the substrate 2. 2 is locked on. Thereby, the drive body 4 is hold | maintained between the cover member 6 and the holding sheet 5 (movable contact member 1) so that a movement to an up-down direction is possible. In this way, the switch device 100 is formed.

  Next, the operation of the switch device 100 will be described with reference to FIGS. 2, 7 and 8. FIG. 7 is a schematic cross-sectional view showing the switch device 100 in a state where the driving body 4 is pressed and the contact portion 1c and the second fixed contact portion 3b are in contact with each other. FIG. 8 is a schematic cross-sectional view showing the switch device 100 in a state where the driving body 4 is further pressed from the state shown in FIG. 7 and the dome 1a is inverted. 7 and 8, there are some parts different from the actual shape and cross section for easy explanation.

  When the switch device 100 is not operated (initial state), as shown in FIG. 2, the movable contact member 1 is in contact with the first fixed contact portion 3a, but is not in contact with the second fixed contact portion 3b. It is in a separated state. That is, there is no electrical continuity between the first fixed contact portion 3a and the second fixed contact portion 3b.

  When the operation portion 4 b of the driving body 4 is pressed downward from the state shown in FIG. 2, the pressing portion 4 c of the driving body 4 presses the movable contact member 1 through the holding sheet 5. In addition, since the diameter dimension of the press part 4c is formed larger than the diameter dimension of the opening part 1d of the movable contact member 1, the press part 4c presses the dome part 1a near the outer peripheral end part of the opening part 1d. The dome portion 1a pressed downward is bent downward. In conjunction with the bending of the dome portion 1a, the contact portion 1c moves downward and contacts the second fixed contact portion 3b as shown in FIG. That is, the first fixed contact portion 3 a and the second fixed contact portion 3 b are electrically connected via the movable contact member 1.

  When the operation portion 4b of the driving body 4 is further pressed downward from the state shown in FIG. 7, the dome portion 1a is maintained while maintaining electrical continuity between the first fixed contact portion 3a and the second fixed contact portion 3b. Further, the arm portion 1f is bent downward as it bends downward, and the dome portion 1a is inverted as shown in FIG. The reversal is performed instantaneously, and the force against the pressing changes abruptly, so that it is transmitted to the operator through the driver 4 as an operation feeling. As described above, a switch device that has a structure that generates an operational feeling after electrical switching is defined as a switch device that supports overstroke. Therefore, it can be said that the switch device 100 according to the present embodiment corresponds to an overstroke because the switch device 100 is configured to generate an operation feeling after electrical switching. When the pressure on the operation unit 4b is released, the initial state is restored by the elastic force of the movable contact member 1, and there is no electrical continuity between the first fixed contact 3a and the second fixed contact 3b. . As described above, the electrical connection between the first fixed contact portion 3a and the second fixed contact portion 3b is switched to function as a switch device.

  Hereinafter, the effect by having set it as this embodiment is demonstrated.

  In the movable contact member 1 of the present embodiment, the dome portion 1a formed to bulge, the leg portion 1b provided on the outer edge portion of the dome portion 1a and supporting the dome portion 1a, and the contact portion movable according to the operation The dome portion 1a has an opening 1d at the top, and the contact portion 1c is disposed at the center position of the opening 1d in plan view from the bulging direction. At the same time, it is connected to the dome portion 1a by a connecting portion 1e that can be bent and deformed, and protrudes inward of the dome portion 1a.

  Thereby, the leg part 1b can hold the dome part 1a stably even when the length of the leg part 1b is increased by specializing in the function of holding the dome part 1a. Difficulty in operation feeling due to tilt. Further, the contact portion 1c is provided at the center position of the dome portion 1a and is formed so as to protrude inward of the dome portion 1a, so that when the movable contact member 1 is pressed, the contact portion 1c comes into contact with the connecting portion 1e. And since the dome part 1a bends and the dome part 1a reverses, it can respond to an overstroke. Therefore, there is an effect that it is possible to provide the movable contact member 1 that can hardly vary the operation feeling and can cope with the overstroke.

  Further, in the movable contact member 1 of the present embodiment, the leg portions 1b are formed in pairs with two pairs arranged at a predetermined interval, and the connecting portion 1e has a plurality of bars. The arm portion 1f is used.

  By arranging the legs 1b in this way, the dome 1a can be supported with good balance. Moreover, the contact part 1c can be supported with sufficient balance by supporting the contact part 1c with the some arm part 1f. Therefore, there is an effect that the posture at the time of the pressing operation is more stable and variation in the operation feeling is less likely to occur.

  Further, in the movable contact member 1 of the present embodiment, the predetermined interval between the paired leg portions 1b is set to a dimension equal to or smaller than the diameter of the dome portion 1a. Thereby, since the dimension of the movable contact member 1 in at least a certain direction is suppressed to be equal to or smaller than the diameter of the dome portion 1a, the occupied area when the movable contact member 1 is arranged in the switch device can be reduced. Therefore, there is an effect that it is easy to deal with a small switch device. Furthermore, by making the predetermined interval substantially the same as the diameter of the dome portion 1a, it becomes easy to cope with a small switch device, and the movable contact member 1 is difficult to tilt and is stable on the substrate 2. There is an effect that it is easy to arrange.

  Further, in the movable contact member 1 of the present embodiment, the dome portion 1a has a circular shape in a plan view from the bulging direction, and the outside of the opening portion 1d that is a boundary portion between the opening portion 1d and the dome portion 1a. The portion 1g is configured to have an arc shape similar to the circular shape of the dome portion 1a.

  As a result, the outer portion 1g of the opening 1d is formed in an arc shape similar to the circular shape of the dome portion 1a, so that stress is less likely to concentrate at a specific location during the pressing operation, and variation in operation feel due to stress concentration is reduced. There is an effect that it can be reduced.

  In the switch device 100 using the movable contact member 1 according to the present embodiment, the operation feeling is difficult to vary, and the movable contact member 1 that can cope with an overstroke, and the fixed contact portion that can be electrically connected to the movable contact member 1. And a substrate 2 having 3.

  Thereby, by using the movable contact member 1 that does not easily vary the operation feeling, there is an effect that it is possible to provide a switch device that does not vary the operation feeling and can cope with an overstroke.

  In the switch device 100 using the movable contact member 1 according to the present embodiment, the holding sheet 5 has a structure in which the non-adhesive portion 5 c is disposed to face the opening 1 d of the movable contact member 1. Thereby, since the connection part 1e (arm part 1f) does not contact the adhesion layer 5b, there exists an effect that it becomes difficult to exert a bad influence on the operation | movement of the connection part 1e (arm part 1f) by the adhesive force of the adhesion layer 5b.

  As described above, the movable contact member and the switch device using the movable contact member according to the embodiment of the present invention have been specifically described. However, the present invention is not limited to the above-described embodiment, and departs from the gist. Various modifications can be made without departing from the scope. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.

  (1) In the movable contact member 1 of the present embodiment, as shown in FIG. 3, the connecting portion 1 e is composed of a plurality of arm portions 1 f formed in a bar shape, and there are three at regular intervals around the contact portion 1 c. The arm portions 1f are arranged and formed to extend radially, but the number and shape of the arm portions 1f may be changed. For example, the connecting portion 1e may have a structure as shown in FIGS. 9 to 11 instead of the shape shown in FIG. In addition, FIG. 9 is a top view which shows one of the modifications of the movable contact member 1 in this embodiment. FIG. 10 is a plan view showing one modified example of the movable contact member 1. FIG. 11 is a plan view showing one of the modifications of the movable contact member 1. In the modification shown in FIG. 9, the connecting portion 1e has three arm portions 1f arranged at equal intervals around the contact portion 1c, and the arm portions 1f are formed so as to meander. The arm portion 1f is formed in the same shape. In the modification shown in FIG. 10, the connecting portion 1e is formed such that one arm portion 1f is disposed at a symmetrical position with the contact portion 1c interposed therebetween, and each arm portion 1f extends so as to meander. . The arm portion 1f is formed in the same shape. 9 and 10, the arm portion 1 f is formed to extend in a meandering manner, so that the length of the arm portion 1 f is increased compared to the case where the arm portion 1 f is extended radially. Therefore, the amount of bending of the arm portion 1f can be increased. In the modification shown in FIG. 11, the connecting portion 1e has one arm portion 1f arranged around the contact portion 1c, and the arm portion 1f is formed to extend linearly. Although there is only one arm portion 1f, the same effect as in the case of the shape shown in FIGS. 3, 9, and 10 can be obtained.

  (2) In the switch device 100 according to the present embodiment, the number of the movable contact members 1 and the fixed contact portions 3 is one, but a plurality of switching operations can be performed by increasing the number of the movable contact members 1 and the fixed contact portions 3. It is good also as a structure where possible.

  (3) In the switch device 100 of the present embodiment, the substrate 2 is a rigid substrate, but a flexible substrate may be used depending on the application.

  (4) In the switch device 100 of the present embodiment, the fixed contact portion 3 is provided on the substrate 2 by printing. However, the fixed contact portion 3 is formed of a metal plate, and the fixed contact portion 3 is inserted into a synthetic resin material. A structure in which the substrate 2 is formed by molding may be used.

  (5) In the switch device 100 of the present embodiment, the pressing portion 4c of the driving body 4 is formed in a columnar shape, but if the dome portion 1a around the outer portion 1g (opening portion 1d) can be pressed. The pressing part 4c may be formed in a cylindrical shape.

  (6) In the switch device 100 of the present embodiment, the movable contact member 1 has a function of electrically connecting the first fixed contact portion 3a and the second fixed contact portion 3b, as shown below. It may be used as a leaf spring for touch during operation. For example, the movable contact member 1 is disposed above the contact portion of the membrane switch, and the switch device is configured to operate the contact portion of the membrane switch via the movable contact member 1. With such a configuration, the movable contact member 1 functions as an actuator that presses the contact portion of the membrane switch, and the membrane switch can have an overstroke function (operation feel). Therefore, it is possible to provide a membrane switch that can cope with an overstroke.

DESCRIPTION OF SYMBOLS 1 Movable contact member 1a Dome part 1b Leg part 1c Contact part 1d Opening part 1e Connection part 1f Arm part 1g Outer part 2 Board | substrate 3 Fixed contact part 3a 1st fixed contact part 3b 2nd fixed contact part 3c External connection terminal 4 Drive Body 4a Base part 4b Operation part 4c Press part 5 Holding sheet 5a Sheet part 5b Adhesive layer 5c Non-adhesive part 6 Cover member 6a Top surface part 6b Insertion hole 6c Side wall 100 Switch device

Claims (4)

A dome formed by bulging;
A leg portion provided at an outer edge portion of the dome portion to support the dome portion;
A movable contact that is reversed by pressing from the bulging direction , having a contact portion that can be moved according to an operation, and an opening disposed at a central position of the dome portion in plan view from the bulging direction. Is a member,
The contact portion is disposed in a central position of the opening in a plan view from a direction of the bulging, projecting inwardly of the front Symbol dome portion,
The movable contact member , wherein the contact portion and the dome portion are connected by a connecting portion that extends inward from the dome portion and can be deformed . The movable contact member according to claim 1, wherein the dome portion is inverted. 3. The movable contact member according to claim 1, wherein, when pressed downward, the contact portion descends to the same height as the leg portion without reversing the dome portion. 4. The movable contact member according to claim 1, and
A substrate having a fixed contact portion electrically connectable to the movable contact member ,
After the movable contact member is pressed and the contact portion comes into contact with the fixed contact portion and is electrically connected, when the movable contact member is further pressed, the dome portion and the connecting portion are bent, A switch device that reverses the dome.

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