JP2007280616A - Movable contact body for switch, and switching device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a movable contact body for a switch and a switching device having high reliability and high flexibility of design. <P>SOLUTION: A movable contact spring 1, equipped with a swollen part 10 with a metal leaf spring swollen toward a tip part from an outer periphery edge in freely reverse movement and a movable contact part formed on an inner face of the swollen part 10, is adhered to a flexible adhesive sheet 2 having an adhesive 20 on the underside. The movable contact spring 1 is provided with a ring-shaped flange 11 with a whole periphery of an outer peripheral edge part continuously folded back in the swelling direction of the swollen part 10, as well as a contact part 13 for a fixed contact 61 at the folded part of the ring-shaped flange 11, and the movement of the adhesive 20 from the adhesive sheet 2 is inhibited by the ring-shaped flange 11. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a switch movable contact body that holds a reversible movable contact spring by an adhesive sheet, and a switch device in which an outer peripheral end face of the movable contact spring is supported by a peripheral fixed contact.

2. Description of the Related Art Conventionally, there has been known a switch device in which the outer peripheral end surface of a reversible dome-shaped movable contact spring is supported by a fixed contact provided in the periphery, and the upper surface side of the movable contact spring used in such a switch device. There is also known a movable contact body for a switch in which is held by an adhesive sheet. As such a movable contact body and switch device for a switch, there exists a thing as mentioned in patent document 1, for example.
Japanese Patent Laid-Open No. 10-199365

  However, when a conventional switch movable contact body is used in a switch device, the adhesive of the pressure-sensitive adhesive sheet may be coherently broken when the switch device is exposed to a harsh environment. In this way, when the adhesive is agglomerated and broken, the adhesive moves on the surface of the movable contact spring by repeating the pressing operation of the movable contact spring, and the adhesive enters the inside from the contact portion with the peripheral fixed contact. It sometimes hindered continuity. For this reason, the material of the pressure-sensitive adhesive is limited, and there is a problem that the degree of freedom in design cannot be ensured.

  The present invention has been made in view of the above problems, and an object thereof is to provide a switch movable contact body and a switch device that are highly reliable and have a high degree of design freedom.

In order to solve the above-mentioned problems, the movable contact body for a switch according to the present invention has a bulging portion that is bulged from the outer peripheral edge toward the top to make it reversible, and is movable on the inner surface of the bulging portion. In the movable contact body for a switch formed by attaching a movable contact spring formed with a contact portion to a flexible adhesive sheet provided with an adhesive on the lower surface,
The movable contact spring is provided with an annular flange portion that is continuously folded in the bulging direction of the bulging portion along the entire circumference of the outer peripheral edge portion, and a contact portion for the fixed contact is formed at the bent portion of the annular ridge portion. The movement of the adhesive from the adhesive sheet is prevented by the annular flange.

  Moreover, the movable contact body for switches according to the present invention is characterized in that the annular flange has a tip projecting so as to be close to or in contact with the lower surface of the adhesive sheet.

  Furthermore, in the movable contact body for a switch according to the present invention, the adhesive sheet has an adhesive portion extending to the outer peripheral side of the annular flange, and a spacer sheet is provided on the lower surface of the adhesive portion, A gap is formed between the front end portion and the pressure-sensitive adhesive sheet.

  Furthermore, the movable contact body for a switch according to the present invention is characterized in that a release sheet that holds the movable contact spring and the adhesive sheet so as to be integrally peelable is provided.

The switch device according to the present invention includes a base having a central fixed contact and a peripheral fixed contact, a reversible movable contact spring for supporting an outer peripheral edge by the peripheral fixed contact of the base, and the movable contact spring. An adhesive sheet provided via an adhesive on the upper surface of the switch device for switching the conduction state between the peripheral fixed contact and the central fixed contact by reversing the movable contact spring,
The movable contact spring has a bulging portion in which a metal plate spring bulges from the outer peripheral edge toward the top, and can be reversed, and an annular shape in which the entire circumference of the outer peripheral edge is continuously folded back in the bulging direction of the bulging portion. And a normal contact portion that is normally connected to the peripheral fixed contact is formed at the folded portion of the annular flange, and the inner surface of the bulging portion faces the central fixed contact and can be freely separated from and connected to the peripheral fixed contact. Forming a movable contact,
The annular flange portion prevents movement of the adhesive from the adhesive sheet.

  Further, the switch device according to the present invention is characterized in that the annular flange portion has a tip portion protruding so as to lift the adhesive sheet.

  Further, in the switch device according to the present invention, the pressure-sensitive adhesive sheet has a pressure-sensitive adhesive portion that extends to the outer peripheral side of the annular flange, and the pressure-sensitive adhesive portion of the pressure-sensitive adhesive sheet is lifted by the thickness of the outer peripheral edge of the peripheral fixed contact. Is formed, and the pressure-sensitive adhesive sheet is lifted by the tip end portion of the annular flange portion to form a second lifting portion.

  Furthermore, in the switch device according to the present invention, the thick portion of the adhesive is formed in an island shape or a strip shape on the adhesive sheet, and the movable contact spring is formed in the thin portion of the adhesive or the portion where the adhesive is not provided. An air flow path that communicates with the interior is formed.

  In the switch device according to the present invention, the adhesive sheet has an adhesive part extending to the outer peripheral side of the annular flange, and the adhesive part is fixed to the base via a spacer sheet, and the spacer sheet Thus, a gap is formed between the tip of the annular flange and the adhesive sheet.

  According to the movable contact body for a switch according to the present invention, the movable contact spring is provided with an annular flange portion that is continuously folded back in the bulging direction of the bulging portion on the outer peripheral edge portion, and the adhesive sheet is formed by the annular ridge portion. By preventing the movement of the adhesive from the adhesive, even if cohesive failure occurs in the adhesive between the movable contact spring and the adhesive sheet, it is possible to prevent the movement of the adhesive by the annular flange, so that the reliability is increased. And the degree of design freedom can be increased.

  In addition, according to the switch movable contact body according to the present invention, the annular flange portion projects the tip portion so as to be close to or in contact with the lower surface of the adhesive sheet, thereby blocking the adhesive with the annular flange portion. Can be reliably prevented from moving.

  Furthermore, according to the movable contact body for a switch according to the present invention, the spacer sheet is provided on the lower surface of the adhesive portion, and a gap is formed between the tip end portion of the annular flange portion and the adhesive sheet. The restraint of the front end portion of the annular flange portion is eliminated, and a better click feeling can be obtained.

  Furthermore, according to the movable contact body for a switch according to the present invention, the contact surface of the movable contact spring is provided at the time of transportation and storage by providing a release sheet that holds the movable contact spring and the adhesive sheet so as to be integrally peelable. In addition, the adhesive surface can be protected, and the switch device can be easily mounted on the base.

  According to the switch device of the present invention, the movable contact spring has a bulging portion in which the metal leaf spring bulges from the outer peripheral edge toward the top and can be reversed, and the entire outer peripheral edge portion is formed by the bulging portion. It has an annular flange that is folded back continuously in the bulging direction, and the movement to the contact side can be prevented by preventing the movement of the adhesive from the adhesive sheet by the annular flange, and a simple configuration Thus, a switch device with high contact reliability can be obtained.

  Further, according to the switch device according to the present invention, the annular flange portion is protruded so as to lift the adhesive sheet, so that even if the adhesive moves from the top side of the movable contact spring, this is ensured. Can be blocked and blocked. In addition, the contact end where the adhesive sheet contacts the base can be moved away from the contact position of the movable contact spring with respect to the peripheral fixed contact, preventing the adhesive from moving from the base side to the contact side. can do.

  Further, according to the switch device of the present invention, the adhesive portion of the adhesive sheet is lifted by the thickness of the outer peripheral edge of the peripheral fixed contact to form the first lifting portion, and the adhesive sheet is lifted by the tip of the annular flange portion. By forming the second lifting part, the first lifting part prevents the movement of the adhesive from the top side of the movable contact spring, and the second lifting part prevents the movement of the adhesive from the base side. can do.

  Furthermore, according to the switch device according to the present invention, the thick portion of the adhesive is formed on the adhesive sheet in the shape of an island or a strip, and the movable contact spring is formed by the thin portion of the adhesive or the portion where the adhesive is not provided. By forming the air flow path communicating with the inside, the air flow path when the movable contact spring is reversed can be configured easily.

  According to the switch device of the present invention, the adhesive portion is fixed to the base via the spacer sheet, and a gap is formed between the distal end portion of the annular flange portion and the adhesive sheet by the spacer sheet. By becoming, the restriction | limiting of the front-end | tip part of the annular collar part by an adhesive sheet is lose | eliminated, and a more favorable click feeling can be obtained.

  Embodiments of the present invention will be described in detail with reference to the drawings. In the first embodiment, a switch movable contact body and a switch device using the same are shown. FIG. 1 shows a cross-sectional view of the switch movable contact body in the first embodiment. The movable contact body for a switch is provided with an adhesive sheet 2 on the upper surface side of the movable contact spring 1 formed in a substantially dome shape, and holds the adhesive sheet 2. Further, the separator sheet 4 is detachably bonded to the adhesive surface of the adhesive sheet 2. The protective sheet 5 is provided on the lower surface side via When this switch movable contact body is used in a switch device, the separator sheet 4 and the protective sheet 5 as a release sheet are removed, and the adhesive sheet 2 and the movable contact spring 1 held thereby are integrally peeled off. Then, it is placed on the base 6 on which the central fixed contact 60 and the peripheral fixed contact 61 are formed, and is fixed by the adhesive of the adhesive sheet 2.

  An adhesive is provided on the lower surface of the adhesive sheet 2, and the movable contact spring 1 is attached to the lower surface of the adhesive sheet 2. Separator sheet 4 has a peel coating treatment applied to the surface of pressure-sensitive adhesive sheet 2 facing the pressure-sensitive adhesive, and has a through-hole having a slightly larger diameter than that of movable contact spring 1. The spring 1 is accommodated. The protective sheet 5 is affixed to the separator sheet 4 via an adhesive so as to cover the through hole of the separator sheet 4 and the lower surface of the movable contact spring 1, and the movable contact spring 1 is used when the switch movable contact body is transported or stored. The contact surface and adhesive layer are protected.

  In FIG. 2, the bottom view and AA sectional drawing of the movable contact spring 1 are shown. 2A is a bottom view, and FIG. 2B is a cross-sectional view taken along the line AA. As shown in FIG. 2 (a), the movable contact spring 1 is formed in a circular shape in plan view, and there are 3 movable contact portions 12 formed in a convex shape downward in the vicinity of the central portion serving as the top portion. Provided. Further, as shown in FIG. 2 (b), the movable contact spring 1 has a bulging portion 10 that is bulged from the outer peripheral edge toward the top so that it can be turned over. An annular flange 11 is provided which is continuously folded back in the bulging direction of the portion 10. Further, the bent portion of the annular flange portion 11 is formed as a regular contact portion 13 whose lower surface is always in contact with the peripheral fixed contact 61 of the base 6 when incorporated in the switch device.

  In FIG. 3, the bottom view and AA sectional drawing of the adhesive sheet 2 are shown. FIG. 3A is a bottom view, and FIG. 3B is a cross-sectional view along AA. As shown in these drawings, the bottom surface of the pressure-sensitive adhesive sheet 2 has a thick portion and a thin portion of the pressure-sensitive adhesive 20, and the thick portion of the pressure-sensitive adhesive 20 is arranged with a plurality of rhombus-like island portions 25. The thin part of the adhesive 20 is provided in a linear shape so as to surround the island-like part 25. When the adhesive sheet 2 covers the movable contact spring 1, only the island-shaped portion 25 is attached to the upper surface of the movable contact spring 1. The thin portion of the adhesive 20 communicates with the space in which the movable contact spring 1 is housed and functions as an air flow path 26. In FIG. 3, the air flow path 26 is a thin portion of the adhesive 20, but it may be a portion where the adhesive 20 is not provided instead.

  Further, as shown in FIG. 1, the annular flange portion 11 of the movable contact spring 1 is formed so that the tip portion is directed upward, and protrudes to a position near the lower surface of the adhesive sheet 2. The pressure-sensitive adhesive sheet 2 extends to the outer peripheral side from the annular flange portion 11 to constitute a pressure-sensitive adhesive portion 21, and the pressure-sensitive adhesive portion 21 is interposed between the protective sheet 5 and the separator sheet 4. For this reason, in the state of the switch movable contact body, it is in a state in which it is not in contact with the tip end portion of the annular flange 11, but when the switch device is configured, the separator sheet 4 is removed and the adhesive portion 21 is removed. Since the lower surface of the adhesive sheet 2 is directly attached to the base 6, the lower surface of the pressure-sensitive adhesive sheet 2 comes into contact with the tip of the annular flange 11 and is slightly lifted. And when the adhesive 20 between the movable contact spring 1 and the adhesive sheet 2 cohesively breaks by this part, the movement to the outer peripheral side of the movable contact spring 1 of the adhesive 20 can be prevented.

  Moreover, by providing the annular flange 11 on the movable contact spring 1 in this way, the stress amplitude on the outer periphery of the movable contact spring 1 can be reduced, and cracking from the outer periphery can be prevented to extend the life. Can do. Furthermore, since the bent portion, not the edge portion of the movable contact spring 1, is always in contact with the peripheral fixed contact 61, there is no contact scraping, and the contact resistance change can be reduced. The annular flange 11 is formed by continuously bending the entire circumference of the movable contact spring 1, whereby the rigidity in the vicinity of the outer periphery can be increased, and the inclination angle can be reduced to increase the height of the bulging portion. Even if it is formed low, it is possible to obtain the same operating force characteristics, so that the height of the entire switch movable contact body can be reduced and the thickness can be reduced.

FIG. 4 shows a cross-sectional view of the switch device in the present embodiment. As shown in this figure, the movable contact body for a switch constitutes a switch device by removing the protective sheet 5 and the separator sheet 4 and arranging the movable contact spring 1 and the adhesive sheet 2 on a base 6. . The base 6 has a central fixed contact 60 and a peripheral fixed contact 61 that is provided around the center fixed contact 60 on the upper surface, and the movable contact portion 12 of the movable contact spring 1 faces the central fixed contact 60, and the movable contact spring. One normal contact portion 13 is arranged so as to always contact the peripheral fixed contact 61. The central fixed contact 60 is electrically connected to the back side of the base 6 through the through hole 60a. Further, the central fixed contact 60 and the peripheral fixed contact 61 are respectively connected to an external output terminal portion (not shown).
The switch device configured as described above is used as a key switch of a mobile communication terminal, for example. A push button (not shown) is arranged on the movable contact spring 1, and the operator presses the push button to move the movable contact. The bulging portion 10 of the spring 1 is reversed and the movable contact portion 12 comes into contact with the central fixed contact 60 and is electrically connected to the peripheral fixed contact 61 via the movable contact spring 1 so that a signal is sent from the external output terminal portion. In addition, a click feeling is generated with the inversion of the bulging portion 10 and is transmitted to the operator via the push button, so that a switch device with good operability can be provided.

  FIG. 5 shows an exploded perspective view of the switch device. As shown in this figure, a plurality of pairs of center fixed contacts 60 and peripheral fixed contacts 61 are arranged on the base 6, and a plurality of movable contact springs 1 are provided correspondingly. Furthermore, one adhesive sheet 2 is provided so as to cover all these movable contact springs 1.

  FIG. 6 shows an enlarged sectional view of the vicinity of the peripheral fixed contact 61 of the switch device of FIG. As shown in this figure, the pressure-sensitive adhesive sheet 2 is attached to the upper surface of the bulging portion 10 of the movable contact spring 1 via an adhesive 20 and floats from the upper surface of the movable contact spring 1 at the annular flange 11 portion. It has become. However, it is in contact with the tip of the annular flange 11 and slightly lifted to form a second lift 23.

  The adhesive portion 21 extending to the outer peripheral side of the annular flange 11 of the adhesive sheet 2 contacts the outer peripheral side of the peripheral fixed contact 61 of the base 6 and is attached by the adhesive 20. The outer peripheral side of the adhesive portion 21 is in contact with the upper surface of the base 6 and is attached by the adhesive 20. Here, the adhesive portion 21 is lifted by the thickness of the outer peripheral edge of the peripheral fixed contact 61 and constitutes a first lifting portion 22. In addition, the air flow path 26 is formed in the adhesive 20 at predetermined intervals as described above.

  As described above, the annular flange 11 is formed by folding the outer peripheral edge of the movable contact spring 1 in the bulging direction of the bulging portion 10, and the second lifting portion 23 is formed by lifting the adhesive sheet 2 at the tip. Thus, even if cohesive failure of the adhesive 20 occurs at the portion where the movable contact spring 1 and the adhesive sheet 2 are adhered, it is dammed up at the annular flange 11 and the second lifting portion 23, and the peripheral fixed contact 61 or the movable contact spring 1 does not penetrate the adhesive 20. Further, by forming the second lifting portion 23, the contact end portion 27 where the adhesive sheet 2 comes into contact with the peripheral fixed contact 61 is positioned away from the permanent contact portion 13 of the movable contact spring 1. Therefore, even when cohesive failure of the adhesive 20 in the adhesive part 21 occurs, the adhesive 20 can be made difficult to enter the position of the regular contact part 13.

  Further, since the adhesive sheet 2 is lifted by the outer peripheral edge of the peripheral fixed contact 61 to form the first raised portion 22, cohesive failure occurs in the adhesive 20 of the adhesive sheet 2 on the outer peripheral side from the peripheral fixed contact 61. Even if it is, it can prevent that it penetrate | invades into the movable contact spring 1 side. And it can be set as a highly reliable switch apparatus by these.

  4 to 6 show the switch device in which the switch movable contact body according to the present embodiment is arranged on the base 6. However, the switch device may have other modes. FIG. 7 shows a cross-sectional view of another embodiment of the switch device using the switch movable contact body in the present embodiment. As shown in FIG. 7, the switch device of this embodiment is configured such that the movable contact spring 1 is housed in a resin housing 65 and the upper part is covered with the adhesive sheet 2.

  A central fixed contact 60 and a peripheral fixed contact 61 are formed on the bottom surface of the housing 65, and the movable contact spring 1 has the normal contact portion 13 of the annular flange 11 placed on the peripheral fixed contact 61. The part 12 is arranged to face the central fixed contact 60. Each contact of the housing 65 is electrically connected to a terminal portion 67 protruding outward.

  The side surface of the housing 65 constitutes a spacer portion 66, and the adhesive portion 21 of the adhesive sheet 2 is attached to the upper surface thereof. As a result, the pressure-sensitive adhesive sheet 2 forms a gap between the tip end portion of the annular flange portion 11. Even in this case, the annular flange 11 has a function of blocking the adhesive 20 between the adhesive sheet 2 and the movable contact spring 1 even when it flows due to cohesive failure, and adheres to the contact portion. The agent 20 is prevented from entering. In addition, since a gap is formed between the tip of the annular flange 11 and the pressure-sensitive adhesive sheet 2, it is possible to eliminate the restriction of the tip of the annular flange 11 by the pressure-sensitive adhesive sheet 2 and obtain a better click feeling. it can.

  Next, a second embodiment of the present invention will be described. FIG. 8 shows a cross-sectional view of the switch movable contact body in the present embodiment. As shown in this figure, the switch movable contact body in this embodiment is provided with an adhesive sheet 2 on the upper surface side of the movable contact spring 1 and holds it, and further includes a spacer sheet 3 and a separator sheet 4 as a release sheet. A protective sheet 5 is provided on the lower surface side. That is, the difference is that the spacer sheet 3 is provided between the adhesive sheet 2 and the separator sheet 4 as compared with the switch movable contact body of the first embodiment. A pressure sensitive adhesive is applied to the back surface of the spacer sheet 3 so that the pressure sensitive adhesive sheet 2 and the movable contact spring 1 and the spacer sheet 3 held by the pressure sensitive adhesive sheet 2 can be integrally peeled from a separator sheet 4 as a peeling sheet. Is retained. When using this switch movable contact body for a switch device, the separator sheet 4 and the protective sheet 5 are removed and placed on the base 6 on which the central fixed contact 60 and the peripheral fixed contact 61 are formed. It is fixed by the adhesive on the lower surface of the spacer sheet.

  By providing the spacer sheet 3 in this way, the contact end portion 28 of the adhesive sheet 2 with respect to the movable contact spring 1 is positioned higher than in the first embodiment. Accordingly, a gap is formed between the tip of the annular flange 11 and the adhesive sheet 2. Accordingly, even when the switch movable contact body is incorporated in the switch device, the distal end portion of the annular flange portion 11 is not restrained by the adhesive sheet 2, and a good click feeling can be obtained. On the other hand, the annular flange 11 can prevent the adhesive 20 from entering the movable contact spring 1 when cohesive failure occurs.

  FIG. 9 shows a cross-sectional view of the switch device according to the present embodiment. As shown in this figure, the spacer sheet 3 contacts the outer peripheral side portion of the peripheral fixed contact 61 and the upper surface of the base 6. Since the pressure-sensitive adhesive sheet 2 is attached to the upper surface of the pressure-sensitive adhesive sheet 2, the pressure-sensitive adhesive sheet 2 is positioned higher than the switch device of the first embodiment by the thickness of the spacer sheet 3, and a gap is formed between the front end of the annular flange 11 To do. Other points are the same as those of the switch device according to the first embodiment.

  FIG. 10 shows an exploded perspective view of the switch device. As shown in this figure, a plurality of pairs of center fixed contacts 60 and peripheral fixed contacts 61 are arranged on the base 6, and a plurality of movable contact springs 1 are provided correspondingly. In addition, the spacer sheet 3 is formed with through holes 40 corresponding to the respective movable contact springs 1 and also with communication holes 41 that allow the adjacent through holes 40 to communicate with each other. By forming the communication hole 41 in the spacer sheet 3 in this way, air can be released through the communication hole 41 when the movable contact spring 1 is reversed. That is, the communication hole part 41 functions as an air flow path. Therefore, in this embodiment, it is not necessary to form the air flow path 26 as in the first embodiment for the adhesive 20 provided on the lower surface of the adhesive sheet 2. Further, a single adhesive sheet 2 is provided so as to cover all these movable contact springs 1 and the spacer sheet 3.

  FIG. 11 shows an enlarged cross-sectional view near the peripheral fixed contact 61 of the switch device. As shown in the figure, the presence of the spacer sheet 3 forms a gap between the tip of the annular flange 11 and the adhesive sheet 2 unlike the first embodiment. The spacer sheet 3 is provided so as to ride on the outer peripheral portion of the peripheral fixed contact 61, and the adhesive sheet 2 attached to the upper surface of the spacer sheet 3 also constitutes the first lifting portion 22 by the outer peripheral edge of the peripheral fixed contact 61. is doing.

  Even if cohesive failure of the adhesive 20 occurs at the portion where the movable contact spring 1 and the adhesive sheet 2 are adhered, it can be prevented from moving to the contact side by the annular flange 11 of the movable contact spring 1. Further, since the pressure-sensitive adhesive sheet 2 is lifted upward by the spacer sheet 3, the contact end portion 27 where the pressure-sensitive adhesive sheet 2 comes into contact with the peripheral fixed contact 61 via the spacer sheet 3 is always in contact with the movable contact spring 1. Since the contact point 13 can be located away from the contact point 13, it is difficult for the pressure-sensitive adhesive 20 to enter the position of the contact point 13 even when the cohesive failure of the pressure-sensitive adhesive 20 occurs in the pressure-sensitive adhesive part 21. Can do. Furthermore, even if cohesive failure occurs in the adhesive between the base 6 and the spacer sheet 3 and the adhesive 20 between the spacer sheet 3 and the adhesive sheet 2 due to the first lifting portion 22, the movement thereof Can be prevented.

  As mentioned above, although embodiment of this invention was described, application of this invention is not restricted to these embodiment, It can apply variously within the range of the technical idea.

It is sectional drawing of the movable contact body for switches in 1st Embodiment. It is a bottom view and AA sectional view of a movable contact spring. It is the bottom view and AA sectional drawing of an adhesive sheet. It is sectional drawing of the switch apparatus in 1st Embodiment. It is a disassembled perspective view of a switch apparatus. It is an expanded sectional view near the peripheral fixed contact of the switch device. It is sectional drawing of the switch apparatus of another form using the movable contact body for switches in 1st Embodiment. It is sectional drawing of the movable contact body for switches in 2nd Embodiment. It is sectional drawing of the switch apparatus in 2nd Embodiment. It is a disassembled perspective view of a switch apparatus. It is an expanded sectional view near the peripheral fixed contact of the switch device.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Movable contact spring 2 Adhesive sheet 3 Spacer sheet 4 Separator sheet 5 Protective sheet 6 Base 10 Expansion part 11 Annular collar 12 Movable contact part 13 Regular contact part 20 Adhesive 21 Adhesive part 22 First lifting part 23 First Lifting part 2 25 Island-like part 26 Air flow path 60 Center fixed contact 61 Peripheral fixed contact

Claims (9)

The metal plate spring has a bulging part that bulges from the outer peripheral edge toward the top and can be reversed, and a movable contact spring is formed by forming a movable contact part on the inner surface of the bulging part, and an adhesive is provided on the lower surface. In the movable contact body for a switch formed on a flexible adhesive sheet,
The movable contact spring is provided with an annular flange portion that is continuously folded in the bulging direction of the bulging portion along the entire circumference of the outer peripheral edge portion, and a contact portion for the fixed contact is formed at the bent portion of the annular ridge portion. The movable contact body for a switch is characterized in that movement of the adhesive from the adhesive sheet is prevented by the annular flange.   The movable contact body for a switch according to claim 1, wherein the annular flange has a tip projecting so as to be close to or in contact with the lower surface of the adhesive sheet.   The pressure-sensitive adhesive sheet has a pressure-sensitive adhesive portion extending to the outer peripheral side of the annular flange, and a spacer sheet is provided on the lower surface of the pressure-sensitive adhesive portion to form a gap between the tip of the annular flange and the pressure-sensitive adhesive sheet The movable contact body for a switch according to claim 1, wherein:   The movable contact body for a switch according to any one of claims 1 to 3, further comprising a release sheet that holds the movable contact spring and the adhesive sheet so as to be integrally peelable. A base having a central fixed contact and a peripheral fixed contact, a reversible movable contact spring for supporting an outer peripheral edge portion on the peripheral fixed contact of the base, and an upper surface of the movable contact spring are provided via an adhesive In a switch device comprising an adhesive sheet and switching the conduction state between the peripheral fixed contact and the central fixed contact by reversing the movable contact spring,
The movable contact spring has a bulging portion in which a metal plate spring bulges from the outer peripheral edge toward the top, and can be reversed, and an annular shape in which the entire circumference of the outer peripheral edge is continuously folded back in the bulging direction of the bulging portion. And a normal contact portion that is normally connected to the peripheral fixed contact is formed at the folded portion of the annular flange, and the inner surface of the bulging portion faces the central fixed contact and can be freely separated from and connected to the peripheral fixed contact. Forming a movable contact,
The switch device characterized in that movement of the adhesive from the adhesive sheet is prevented by the annular flange.   The switch device according to claim 5, wherein the annular flange has a tip protruding so as to lift the adhesive sheet.   The pressure-sensitive adhesive sheet has a pressure-sensitive adhesive portion extending to the outer peripheral side of the annular flange portion, and lifts the pressure-sensitive adhesive portion of the pressure-sensitive adhesive sheet according to the thickness of the outer peripheral edge of the peripheral fixed contact to form a first lifted portion. The switch device according to claim 6, wherein the pressure-sensitive adhesive sheet is lifted by a tip portion of the portion to form a second lifting portion.   On the pressure-sensitive adhesive sheet, a thick portion of the pressure-sensitive adhesive is formed in an island shape or a band shape, and an air flow path communicating with the inside of the movable contact spring is formed in a thin portion of the pressure-sensitive adhesive or a portion where the pressure-sensitive adhesive is not provided. The switch device according to claim 6 or 7, wherein:   The pressure-sensitive adhesive sheet has a pressure-sensitive adhesive portion that extends to the outer peripheral side of the annular flange portion, and the pressure-sensitive adhesive portion is fixed to the base via a spacer sheet, and the tip end portion of the annular flange portion and the The switch device according to claim 5, wherein a gap is formed between the adhesive sheet and the adhesive sheet.

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