JP2007299588A - Push-button switch and sheet with contact spring used for construction of push-button switch - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a push-button switch in which plating of the crown part of a contact spring is hardly peeled off. <P>SOLUTION: The push-button switch is provided with an operating member 4, a fixed contact 9 provided on a substrate 7 opposed to this operating member 4, a contact spring 10 on the concave curved surface side of which crown part 11, a movable contact 12 corresponding to the fixed contact 9 is provided, and a sheet member 13 which is adhered to the convex curved surface side of the contact spring 10 and the substrate 7 and fixes the contact spring 10 to the substrate 7 reversibly and restorably. The movable contact 12 protrudes on the concave curved surface side of the crown part 11. A transmission member 16 for transmitting the pushing force given to the operating member 4 is arranged at the opposed position to the crown part 11 of the contact spring 10 interposing the sheet member 13, and is adhered to the sheet member 13. This transmission member 16 is established to be dimensions to cover a range wider than a plane of projection of a prescribed range of the crown part of the contact spring 10 including the movable contact 12. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a pushbutton switch that is turned on or off by reversing and restoring a conductive contact spring having a cross-sectional shape formed in an arch shape, and a seat with a contact spring used for manufacturing the pushbutton switch.

As a conventional push button switch, there is one shown in Patent Document 1. This conventional pushbutton switch is an elastic body in which a sheet-like operation member to be pressed, a fixed contact provided at a position facing the operation member, and a basic cross-sectional shape formed in an arch shape. The contact spring is disposed between the operation member and the fixed contact, and a movable contact corresponding to the fixed contact is provided on the concave curved surface side of the top portion. The movable contact protrudes on the concave surface side of the top of the contact spring.
JP 2005-209616 A

  The contact spring provided in the above-described prior art is produced by drawing a metal plate plated with a metal such as silver having high conductivity in order to obtain stable conduction by contact with and separation from the fixed contact. There is something. In the contact spring manufactured by drawing, stress is concentrated in the vicinity of the protrusion forming the movable contact and the protrusion, so that the pressing force transmitted from the operation member is concentrated in a part of the top. Then, there is a possibility that the plating may be peeled off from the protrusion or the vicinity of the protrusion.

  The present invention has been made in consideration of the above-described actual situation, and an object of the present invention is to provide a pushbutton switch in which the plating on the top of the contact spring is difficult to peel off, and a sheet with a contact spring used for manufacturing the pushbutton switch. There is.

[1] The pushbutton switch of the present invention is an elastic member in which an operation member to be pressed, a fixed contact provided on a substrate facing the operation member, and an arched basic shape of the cross section are formed. The contact spring is disposed between the operating member and the fixed contact, and a movable contact corresponding to the fixed contact is provided on the concave curved surface side of the top, and the convex spring side of the contact spring and the substrate are adhered to each other. A push-button switch that includes a sheet member that reversibly and reversibly fixes the contact spring with respect to the substrate, wherein the movable contact protrudes on the concave curved surface side of the top of the contact spring. And a transmission member that is provided integrally with the sheet member at a position facing the top of the contact spring across the sheet member, and that transmits a pressing force applied to the operation member to the contact spring. This Reaches member, characterized in that it is set to a size to cover a wider range than the projection surface in a predetermined range of the top of the contact spring that includes a movable contact.

  In the pushbutton switch of the present invention configured as described above, the transmission member is set to a size that covers a wider range than the projection surface of the predetermined range at the top of the contact spring including the movable contact. Is distributed over the predetermined range of the top of the contact spring including the movable contact. That is, it is possible to prevent the pressing force from being concentrated on a part of the top of the contact spring. Thereby, plating of the contact spring can be made difficult to peel off.

[2] The pushbutton switch according to the present invention is characterized in that in the pushbutton switch described in “[1]”, the movable contacts are scattered so as to surround the center of the top of the contact spring.

  In the pushbutton switch of the present invention configured as described above, when the contact spring is reversed, the top of the contact spring is inclined with respect to the fixed contact, or a foreign object is caught between the fixed contact and the movable contact. In addition, any of the movable contacts that are scattered so as to surround the center of the top of the contact spring can be brought into contact with the fixed contact. Thereby, it is possible to improve the reliability of contact between the movable contact and the fixed contact when the operation member is pressed.

[3] The pushbutton switch according to the present invention is the pushbutton switch according to “[2]”, wherein the three movable contacts are provided, and the distances from the movable contacts to the center of the top are equal to each other. The intervals between the contacts are set equal to each other.

  In the pushbutton switch of the present invention configured as described above, the certainty of contact between the movable contact and the fixed contact when the operation member is pressed can be effectively improved with an easily molded shape.

[4] A seat with a contact spring according to the present invention is a seat with a contact spring used for manufacturing the pushbutton switch according to any one of “[1]” to “[3]”, and the contact spring; The transmission member and the sheet member are provided, the convex curved surface side of the contact spring and the sheet member are adhered, and the transmission member faces the top of the contact spring across the sheet member Is arranged, and the transmission member and the sheet member are bonded to each other.

  Since the seat with a contact spring of the present invention configured as described above can handle the contact spring, the transmission member, and the sheet member as one component, any one of “[1]” to “[3]”. It is possible to contribute to improving the production efficiency of the pushbutton switch described in 1.

[5] The seat with a contact spring according to the present invention is the seat with a contact spring according to “[4]”, wherein a plurality of combinations of the contact spring and the transmission member are arranged in a predetermined arrangement with respect to the seat member. It is characterized by being arranged.

  In the seat with a contact spring of the present invention configured as described above, a plurality of combinations of contact springs and transmission members can be collectively handled as one part when producing an operation panel on which a plurality of pushbutton switches are arranged. The predetermined arrangement is an arrangement set corresponding to the arrangement of push button switches provided on the operation panel.

[6] A sheet with a contact spring according to the present invention is the sheet with a contact spring according to “[4]”, wherein the sheet member can emit light, and the transmission member has light permeability. It is characterized by.

  By fabricating the push button switch using the seat with a contact spring of the present invention configured as described above, the assembly of the contact spring and the transmission member and the assembly of the illumination means of the push button switch can be performed simultaneously. Further, since the sheet member also serves as an illumination light source, it is possible to reduce the number of parts for illuminating the push button switch.

[7] The sheet with a contact spring of the present invention is the sheet with the contact spring according to “[4]”, in a state where the contact spring is covered with the surface of the sheet member on which the contact spring is adhered and held. Peeling having a peeling part that is releasably adhered to the sheet member, and a cover part that is formed integrally with the peeling part and covers the surface of the sheet member to which the transmission member is bonded and the transmission member A sheet is provided.

  In the present invention configured as described above, the surface of the sheet member on which the contact spring is adhesively held and the contact spring can be protected by the peeling portion at the time of conveyance or storage, and the sheet member to which the transmission member is bonded can be protected. The surface and the transmission member can be protected by the cover portion.

  Since the present invention can provide a pushbutton switch in which the plating on the top of the contact spring is difficult to peel off, the reliability of the pushbutton switch as a product can be improved. Moreover, the sheet | seat with a contact spring which can contribute to the improvement of the production efficiency of the pushbutton switch which the plating of the top part of a contact spring cannot peel easily can be provided.

  An embodiment of the push button switch of the present invention and a sheet with a contact spring used for manufacturing the push button switch will be described.

<Push button switch>
An embodiment of the pushbutton switch of the present invention will be described with reference to FIGS. FIG. 1 is a cross-sectional view showing an operation panel provided with a plurality of embodiments of the pushbutton switch of the present invention, FIG. 2 is a cross-sectional view showing a state in which an operation member and a case are removed from the operation panel shown in FIG. FIG. 3 is a view taken in the direction of arrows III-III.

  The present embodiment is a plurality of pushbutton switches 3 arranged on the operation panel 1 shown in FIG. The electric product provided with the operation panel 1 is, for example, a mobile phone.

  As shown in FIG. 1, the pushbutton switch 3 includes a sheet-like operation member 4 that is pressed. The operation member 4 is formed by bonding sheets 5 and 6 together. The sheet 5 is formed with a protruding portion 5 a that constitutes a push button protruding from the case 2 of the operation panel 1. The sheet 6 is formed with a protrusion 6 a that protrudes in a direction opposite to the protrusion 5 a at a position corresponding to the protrusion 5 a of the sheet 5. The operation members 4 of the plurality of push button switches 3 are formed integrally.

  A substrate 7 is disposed at a position facing the operation member 4. On the substrate 7, an annular fixed contact 8 and a central fixed contact 9 positioned at the center of a circle drawn by the annular fixed contact 8 are provided.

  A contact spring 10 is disposed between the operation member 4 and the central fixed contact 9. The contact spring 10 is an elastic body produced by drawing a metal plate material plated with a highly conductive metal such as silver. The cross-sectional shape of the contact spring 10 is formed in an arch shape, for example, a dome shape. A movable contact 12 corresponding to the center fixed contact 9 is provided on the concave curved surface side of the top 11 of the contact spring 10. The edge of the contact spring 10 is always in contact with the annular fixed contact 8.

  As shown in FIGS. 2 and 3, the movable contact 12 protrudes on the concave curved surface side of the top 11 of the contact spring 10. The movable contact 12 is dotted so as to surround the center 11 a of the top 11 of the contact spring 10. For example, three movable contacts 12 are provided, and the distances from the movable contacts 12 to the center 11a of the top 11 are equal to each other, and the intervals between the movable contacts 12 are set to be equal to each other.

  A sheet member 13 is adhered to the convex curved surface side of the contact spring 10. The sheet member 13 is adhesively held on the substrate 7 on the outer peripheral side of the contact spring 10. That is, the contact spring 10 is fixed to the substrate 7 via the sheet member 13 so that it can be reversed and restored.

  As shown in FIG. 2, a transmission member 16 for transmitting the pressing force applied to the operation member 4 to the contact spring 10 is disposed at a position facing the top portion 11 of the contact spring 10 with the sheet member 13 interposed therebetween. The sheet member 13 is bonded. The transmission member 16 is set to a size that covers a wider range than the projection surface of the predetermined range of the top 11 of the contact spring 10 including the movable contact 12.

  A plurality of combinations of the contact spring 10 and the transmission member 16 are provided for one sheet member 13. A combination of the contact spring 10 and the transmission member 16 is arranged corresponding to the arrangement of the operation members 4 on the operation panel 1.

  The sheet member 13 is formed by bonding the upper surface of the spacer sheet 15 to the adhesive formed on the lower surface of the sheet member main body 14. The sheet member main body 14 holds the contact spring 10 with an adhesive on the lower surface and holds the transmission member 16 integrally on the upper surface. The spacer sheet 15 has a plurality of frame portions 15 a surrounding each contact spring 10, is held by the adhesive on the lower surface of the sheet member main body 14, and is fixed to the substrate 7 with the adhesive. That is, the sheet member main body 14 is lifted from the substrate 7 by the spacer sheet 15, thereby preventing the sheet member 13 from being separated from the substrate 7 in the vicinity of the edge of the contact spring 10.

  The transmission member 14 can be integrally formed by, for example, applying an ultraviolet curable resin material to the upper surface of the sheet member main body 14 by a dispenser or printing, and then curing and adhering it by irradiating ultraviolet rays. In addition, the transmission member 14 may be formed of a thin resin plate and bonded to the sheet member main body 14 with an adhesive, or may be integrated by welding the resin plate with a laser or heat. .

  In the pushbutton switch 3 configured as described above, when the operation member 4 is pressed and bent to the position of the transmission member 16, the pressing force applied to the operation member 4 is transmitted between the transmission member 16 and the sheet member body 14 of the sheet member 13. To the top 11 of the contact spring 10.

  The pressing force transmitted from the operating member 4 to the top 11 of the contact spring 10 is distributed over a predetermined range of the top 11 of the contact spring 10 including the three movable contacts 12. This is because the transmission member 16 is set to a size that covers a range wider than the projection surface of the predetermined range of the top 11 of the contact spring 10 including the three movable contacts 12.

  Further, the contact spring 10 is reversed by pressing to generate a click feeling, but the click feeling becomes worse as the contact spring 10 moves away from the top of the contact spring toward the periphery. Therefore, the outer edge of the transmission member 16 is set so that the pressing force of the operation member 4 is applied within a predetermined range including the movable contact 12 called a sweet spot.

  When a pressing force is applied to the top portion 11 of the contact spring 10 in this way, the top portion 11 is sunk, that is, the contact spring 10 is reversed, and any or all of the three movable contacts 12 are connected to the central fixed contact. 9 is contacted. As a result, the center fixed contact 6 and the annular fixed contact 7 are electrically connected via the contact spring 3, that is, the push button switch 3 is turned on and a good click feeling is obtained.

  When the pressing force applied to the operating member 4 disappears, the contact spring 10 returns to the initial state due to its own springiness, so that the operating member 4, the sheet member 13 and the contact spring 10 are restored, respectively, as shown in FIG. Return to the state shown. Accordingly, the movable contact 12 is separated from the center fixed contact 9, so that the push button switch 3 is turned off.

  According to the push button switch 3, the following effects can be obtained.

  In the pushbutton switch 3, the transmission member 16 is set to a size that covers a wider range than the projection surface of the predetermined range of the top 11 of the contact spring 10 including the movable contact 12. As a result, the pressing force transmitted from the operating member 4 to the contact spring 10 is distributed over the entire predetermined range of the top 11 of the contact spring 10 including the movable contact 12. That is, it is possible to prevent the pressing force from being concentrated on a part of the top portion 11 of the contact spring 10. Thereby, plating of the top part 11 of the contact spring 10 can be made difficult to peel off. Therefore, the reliability of the push button switch as a product can be improved. Even if there is a slight deviation in assembly between the relative position of the operation member 4 and the substrate 7, the pressing force of the operation member 4 is transmitted to the contact springs facing both via the transmission member 16. A good click feeling can be obtained.

  Further, in the pushbutton switch 3, when the contact spring 10 is reversed, the top 11 of the contact spring 10 is tilted with respect to the central fixed contact 9, or a foreign object is caught between the central fixed contact 9 and the movable contact 12. Even so, any of the movable contacts 12 that are scattered so as to surround the center 11 a of the top 11 of the contact spring 10 can be brought into contact with the central fixed contact 9. Thereby, the certainty of the contact of the movable contact 12 and the center fixed contact 9 when the operation member 4 is pressed can be improved.

  Further, in the pushbutton switch 3, three movable contacts 12 are provided, the distances from the movable contacts 12 to the center 11a of the top 11 are equal to each other, and the intervals between the movable contacts 12 are set to be equal to each other. . Thereby, the certainty of the contact of the movable contact 12 and the center fixed contact 9 when the operation member 4 is pressed can be effectively improved by the shape of the contact spring 10 that is easily formed by drawing.

  The push button switch 3 is an example in which three movable contacts 12 are provided on the contact spring 10, but the movable contact provided in the push button switch of the present invention is not limited to this, and the movable contacts shown in FIGS. The contact 30 may be used. The movable contact 30 protrudes in an annular shape on the concave curved surface side of the top 11 of the contact spring 10.

  Further, the contact spring 10 provided in the push button switch 3 is an example formed in a circular shape in plan view. However, the shape of the contact spring of the present invention is not limited to this, for example, a substantially rectangular shape in plan view or a plan view. It may be oval.

<Seat with contact spring>
One embodiment of the sheet with a contact spring of the present invention will be described with reference to FIGS. FIG. 4 is a cross-sectional view showing an embodiment of a sheet with contacts used in the production of the operation panel shown in FIG. 1, and FIG. 5 is a perspective view showing a state during conveyance and storage of the sheet with contacts shown in FIG. .

  This embodiment is a sheet 20 with a contact spring shown in FIG. The contact spring-equipped sheet 20 is used for manufacturing the push button switch 3 described above.

  The contact spring-equipped sheet 20 includes a contact spring 10, a transmission member 16, and a sheet member 13. The sheet member 13 is adhered to the convex curved surface side of the contact spring 10, and the sheet member 13 is sandwiched between the contact members. The transmission member 16 is integrated with the sheet member 13 by adhesion or the like at a position facing the top of the spring 10. The main body of the sheet member 13 is made of a material that can emit light, for example, an EL element, and the transmission member 16 is made of a resin having optical transparency.

  A plurality of combinations of the contact spring 10 and the transmission member 16 are provided for one sheet member 13. The combinations of the contact springs 10 and the transmission members 16 are arranged in a predetermined arrangement so as to correspond to the arrangement of the push button switches 3 (operation members 4) provided in the operation panel 1.

  Further, the contact spring-equipped sheet 20 includes a release sheet 21. This release sheet 21 is formed by laminating a frame-shaped sheet 22 and a protective sheet 23. The frame-shaped sheet 22 is formed in a frame shape because the opening 22a through which the contact spring 10 is inserted is formed when the contact spring 10 and the sheet member 13 are adhered when the sheet 20 with the contact spring is manufactured. ing. The protective sheet 23 is attached to the frame-shaped sheet 22 after the contact springs 10 and the sheet members 13 are adhered, and closes the opening 22 a of the frame-shaped sheet 22.

  The release sheet 21 adheres to the spacer sheet 15 so as to be peelable while covering the surface of the sheet member main body 14 of the sheet member 13 to which the contact spring 10 is adhered and held, the contact spring 10 and the spacer sheet 15. Has been. An adhesive layer is provided on the adhesive surface of the spacer sheet 15 facing the release sheet 21, and the spacer sheet 15 in a state where the release sheet 21 has been peeled holds the sheet member 13 to the substrate 7 by the adhesive layer. Be able to.

  Further, as shown in FIG. 5, the release sheet 21 is formed in, for example, a belt shape, and is detachably adhered to a plurality of sheet members 13 provided with a plurality of combinations of the contact spring 10 and the transmission member 16. The release sheet 21 in this state can be a roll 26. The release sheet 21 has a release portion 24 and a cover portion 25. As shown in FIG. 4, the peeling portion 24 covers the surface of the sheet member main body 14 of the sheet member 13 to which the contact spring 10 is adhered and held, the contact spring 10, and the spacer sheet 15. It is adhered to the film in a peelable manner. The cover part 25 is formed integrally with the peeling part 24, for example, the protective sheet 23 of the peeling sheet 21 is formed longer than the frame-like sheet 22, and is wound around the outer peripheral surface of the roll 26. Thus, the surface of the sheet member 13 on which the transmission member 16 is integrated and the transmission member 16 are covered. The end portion of the cover portion 25 in a state of being wound around the outer peripheral surface of the roll 26 is fixed to the roll 26 with an adhesive tape 27.

  According to the seat 20 with the contact spring, the following effects can be obtained.

  According to the sheet 20 with the contact spring, the contact spring 10, the transmission member 16, and the sheet member 13 can be handled together as one component, so that the efficiency of manufacturing the push button switch 3 in which the plating of the top 11 of the contact spring 10 is difficult to peel off. Can contribute to the improvement.

  Further, in the seat 20 with the contact spring, a plurality of combinations of the contact spring 10 and the transmission member 16 are provided in a predetermined arrangement with respect to the sheet member 13. Thereby, when manufacturing the operation panel 1 in which a plurality of pushbutton switches 3 are arranged, the combination of the plurality of contact springs 10 and the transmission member 16 can be collectively handled as one component. Can contribute to the improvement of efficiency.

  Moreover, in the sheet | seat 20 with a contact spring, the sheet | seat member 13 consists of what can light-emit, and the transmission member 16 consists of what has a light transmittance. Thereby, the assembly of the contact spring 10 and the transmission member 16 and the assembly of the illumination means of the push button switch 3 can be performed simultaneously. Further, since the sheet member 13 also serves as an illumination light source, it is possible to reduce the components for the illumination of the push button switch 3.

  Further, in the sheet 20 with the contact spring, the surface of the sheet member 13 to which the contact spring 10 is bonded and the contact spring 10 are protected by the peeling portion 24 of the release sheet 21 at the time of transport or storage, at the time of transport or storage. Thus, the surface of the sheet member 13 to which the transmission member 16 is bonded and the transmission member 16 can be protected by the cover portion 25 of the release sheet 21.

  In addition, the sheet | seat 20 with a contact spring consists of what the sheet | seat member 13 can light-emit for the improvement of the assembly | attachment property of an illumination means, and reduction of a number of parts, and the transmission member 16 has a light transmittance. However, the present invention is not limited to this, and the sheet member may not be capable of emitting light and the transmission member may be a light member if there is no need to improve the assembling property of the illumination means or reduce the number of parts. It does not need to have transparency.

It is sectional drawing which shows the operating panel provided with two or more one Embodiment of the pushbutton switch of this invention. It is sectional drawing which shows the state which removed the operation member and the case from the operation panel shown in FIG. It is the III-III arrow line view of FIG. It is sectional drawing which shows one Embodiment of the sheet | seat with a contact point used for preparation of the operation panel shown in FIG. It is a perspective view which shows the state at the time of conveyance of the sheet | seat with a contact shown in FIG. 4, and a storage. It is sectional drawing corresponding to FIG. 2 which shows another example of the movable contact of this invention. It is a VII-VII arrow line view of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Operation panel 2 Case 3 Pushbutton switch 4 Operation member 5 Sheet 5a Protrusion part 6 Sheet 6a Protrusion part 7 Substrate 8 Toroidal fixed contact 9 Central fixed contact 10 Contact spring 11 Top part 11a Center 12 Movable contact 13 Sheet member 14 Sheet member main body 15 Spacer sheet 15a Frame part 16 Transmission member 20 Sheet with contact spring 21 Release sheet 22 Frame sheet 22a Opening part 23 Protection sheet 24 Release part 25 Cover part 26 Roll 27 Adhesive tape 30 Movable contact

Claims (7)

An operation member to be pressed;
A fixed contact provided on the substrate facing the operation member;
An elastic body having a cross-sectional basic shape formed in an arch shape, the contact being disposed between the operation member and the fixed contact, and a movable contact corresponding to the fixed contact provided on the concave curved surface side of the top Springs,
A sheet member that is adhered to the convex curved surface side of the contact spring and the substrate and fixes the contact spring in a reversible and recoverable manner with respect to the substrate;
The movable contact is a pushbutton switch protruding on the concave curved surface side of the top of the contact spring,
A transmission member is provided integrally with the sheet member at a position facing the top of the contact spring across the sheet member, and transmits a pressing force applied to the operation member to the contact spring. ,
The push button switch, wherein the transmission member is set to have a size that covers a range wider than a projection surface of a predetermined range at the top of the contact spring including the movable contact.   2. The pushbutton switch according to claim 1, wherein the movable contacts are scattered so as to surround a center of a top portion of the contact spring.   In the invention according to claim 2, there are provided three movable contacts, each distance from each movable contact to the center of the top is equal to each other, and each interval between the movable contacts is set equal to each other. A push button switch. It is a sheet | seat with a contact spring used for preparation of the pushbutton switch of any one of Claims 1-3,
The contact spring, the transmission member, and the sheet member;
The convex curved surface side of the contact spring and the sheet member are adhered to each other, and the transmission member is disposed to face the top of the contact spring across the sheet member, and the transmission member and the sheet member are A sheet with a contact spring, which is bonded.   5. The seat with a contact spring according to claim 4, wherein a plurality of combinations of the contact spring and the transmission member are arranged in a predetermined arrangement with respect to the sheet member.   5. The contact spring-equipped sheet according to claim 4, wherein the sheet member is made of a material capable of emitting light, and the transmission member is made of a light-transmitting material. The invention according to claim 4, wherein the contact spring is covered with the surface of the sheet member on which the adhesive spring is adhered and the contact spring, and is peeled and adhered to the sheet member so as to be peelable; A sheet with a contact spring, comprising a release sheet formed integrally and having a cover portion covering the surface of the sheet member to which the transmission member is bonded and the transmission member.

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