JP2006344511A - Sheet with click spring, its manufacturing method and switch using it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sheet with a click spring capable of surely transmitting pressing force to the click spring, simply manufacturable and capable of being inexpensively provided; to provide its manufacturing method; and to provide a switch using it. <P>SOLUTION: This sheet with a click spring is provided with: a sheet member 1; the click spring 4 held to the side of one surface of the sheet member 1; and a pressing force transmission member 2 arranged on the other surface of the sheet member 1 facing to the click spring 4 for transmitting pressing force to the click spring 4. The sheet member 1 and the pressing force transmission member 2 are formed with synthetic resin materials weldable to each other; and, by irradiating a superposing part P between the sheet member 1 and the pressing force transmission member 2 with laser or applying ultrasonic waves thereto, the sheet member 1 and the pressing force transmission member 2 are fixed to each other by welding the superposition part P thereto. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a sheet with a click spring in which a click spring is attached to the lower surface side of the sheet, a manufacturing method thereof, and a switch using the same.

  As a structure of a conventional click spring-equipped sheet and switch, a click spring-attached sheet in which a click spring is attached to the lower surface of the sheet with an adhesive or an adhesive, and an upper surface of the sheet is provided by a method such as molding or printing. And a switch for switching the switch by reversing the click spring by pressing the center of the top of the surface of the click spring through the protrusion. For example, see Patent Document 1).

The structure of this conventional seat with click spring and switch is shown in FIGS. FIG. 7 is a perspective view of a conventional seat with a click spring, and FIG. 8 is a sectional view of the same.
In the figure, a sheet 20 with a click spring includes a metal click spring 31, an assembly sheet 21 having a protrusion 22 at a position corresponding to the center of the metal click spring 31, and the metal click spring 31 fitted in the hole 25. And a perforated sheet 23 attached thereto.

  The assembly sheet 21 is a thin film sheet, and a plurality of assembly sheet protrusions 22 are formed at positions corresponding to the tops of the metal click springs 31 by molding or printing. The assembly sheet convex portion 22 is formed of a translucent material so that a push button (not shown) can be illuminated. The perforated sheet 23 is protected by a release paper 26 with an adhesive on the lower surface.

The assembly of the sheet 20 with the click spring is performed by assembling the metal click spring 31 in the hole portion 25 of the perforated sheet 23 to which the release paper 26 is pasted, and pasting the assembly sheet 21 on top with an adhesive or an adhesive. I can do it.
Note that. Although the sheet 20 with a click spring is comprised by the metal click spring 31, the assembly sheet | seat 21 which has a convex part, and the perforated sheet | seat 23, the metal click spring 31 and the assembly | attachment sheet | seat 21 which has a convex part It can also be configured by.

  In order to assemble the click spring-equipped sheet 20 as a push button type operation switch, the release paper 26 is peeled off and attached to the switch portion of the switch board (not shown) so that the metal click spring 31 corresponds, Assembling to the operation switch can be performed only by attaching a push button fitted in a cover or the like from above.

  The click spring-equipped sheet 20 includes the metal click spring 31 and the assembly sheet 21 having a convex portion at a position corresponding to the center of the metal click spring 31, so that the click performance is not easily impaired. Assembly can be performed. In addition, when the push button is attached, the bottom surface can be made flat and simple.

JP 11-317125 A

  However, in the conventional sheet and switch with a click spring described above, when the convex portion is formed by printing or the like, there is a problem that the processing speed is slow because it takes time for curing, and it cannot be manufactured at low cost.

  Therefore, the present invention solves the above-described problems, can reliably transmit the pressing force to the click spring, can be easily manufactured, and can be provided at a low cost, and its manufacturing method, and its manufacturing method. It is an object to provide a switch using the switch.

In order to solve the above-mentioned problem, in the present invention, as a first solving means, a sheet member, a click spring held on one surface side of the sheet member, and the other of the sheet member facing the click spring A pressing force transmission member that is provided on a surface and transmits a pressing force to the click spring, the sheet member and the pressing force transmission member are formed of a synthetic resin material that can be welded to each other, and the sheet member The overlapping portion with the pressing force transmitting member is irradiated with a laser or ultrasonic waves are applied to weld the overlapping portion to fix the sheet member and the pressing force transmitting member.
As a second solution, the sheet member and the pressing force transmission member are formed of the same type of synthetic resin material.
As a third solution, the sheet member and the pressing force transmitting member are formed of a light-transmitting synthetic resin material, and a light emitting sheet made of a sheet-like surface light emitting member is laminated on one surface side of the sheet member. And it was set as the structure which hold | maintained the said click spring in this light emission sheet | seat.

Further, as a fourth solving means, a pressing force transmission member made of a small piece resin is supplied to a predetermined position of the sheet member, and the sheet member and the pressing force transmission member are overlapped with each other to transmit light. The overlapping portion is welded by irradiating a laser beam while making pressure contact, and the pressing force transmission member is fixed to the sheet member, and then clicked on the sheet member corresponding to the pressing force transmission member. The manufacturing method was such that the spring was held by an adhesive.
As a fifth solution, a pressing force transmission member made of a small piece resin is supplied to a predetermined position of the sheet member, and the ultrasonic welding member is pushed in a state where the sheet member and the pressing force transmission member are overlapped. The overlapping portion is welded by applying pressure to the sheet member and the pressing force transmission member is fixed to the sheet member. After that, a click spring is attached to the sheet member in correspondence with the pressing force transmission member. It was set as the manufacturing method hold | maintained by.
Further, as a sixth solution, the manufacturing method is such that after the pressing force transmitting member is fixed to the sheet member, the adhesive is applied to the sheet member.

  Further, as a seventh solving means, the sheet with a click spring according to any one of the first to third solving means and a circuit board provided with a pair of opposing fixed contacts, the sheet with the click spring The switch is configured such that the click spring and the fixed contact face each other and are stacked on the circuit board.

As described above, the sheet with a click spring according to the present invention is provided on the other surface of the sheet member facing the sheet member, the click spring held on one surface side of the sheet member, and the click spring. A pressing force transmission member that transmits the pressing force to the spring, the sheet member and the pressing force transmission member are formed of a synthetic resin material that can be welded together, and the overlapping portion of the sheet member and the pressing force transmission member Since the overlapping part is welded by irradiating a laser or applying ultrasonic waves, the sheet member and the pressing force transmitting member are fixed, and the pressing force transmitting member is fixed to the sheet member by an adhesive or printing. Compared with this, the processing speed can be improved, the manufacturing can be easily performed, and it can be provided at a low cost.
Further, since the sheet member and the pressing force transmission member are formed of the same type of synthetic resin material, the strength at the time of joining can be increased.
In addition, the sheet member and the pressing force transmission member are formed of a translucent synthetic resin material, a light emitting sheet made of a sheet-like surface light emitting member is laminated on one surface side of the sheet member, and a click spring is held on the light emitting sheet Therefore, by forming the sheet member and the pressing force transmission member with a light-transmitting synthetic resin, the illumination function of the surface emitting material is not hindered, so a sheet with a click spring with an illumination function can be easily obtained. It is done.

In addition, a pressing force transmission member made of a small piece resin is supplied to a predetermined position of the sheet member, the sheet member and the pressing force transmission member are overlapped, and laser light is irradiated while being pressed and adhered with a translucent pressure member. By doing so, the overlapping portion is welded and the pressing force transmission member is fixed to the sheet member, and then the click spring is held on the sheet member by an adhesive corresponding to the pressing force transmission member. In addition, the laser beam can reliably contact the sheet member and the pressing force transmission member, and the processing speed can be improved.
In addition, a pressing force transmission member made of a small piece resin is supplied to a predetermined position of the sheet member, and the sheet member and the pressing force transmission member are overlapped with each other by pressing the ultrasonic welding member to make pressure contact. Since the joining portion is welded and the pressing force transmission member is fixed to the sheet member, and then the click spring is held on the sheet member by an adhesive corresponding to the pressing force transmission member, ultrasonic welding is performed. Thus, the sheet member and the pressing force transmission member can be reliably adhered, and the processing speed can be improved.
In addition, since the pressure transmitting member is fixed to the sheet member and then the adhesive is applied to the sheet member, the contact height variation with the ultrasonic welding member is varied by applying the adhesive in a subsequent process. Can be reduced and welding can be ensured.

  The click spring-equipped sheet according to any one of the first to third solving means and a circuit board provided with a pair of opposed fixed contacts, the click spring having the click spring and the fixed contact Since the switch is laminated on the circuit board so that the pressing force is transmitted to the click spring by the pressing force transmitting member, a good click feeling can be obtained, and the sheet member and the pressing force transmitting member are Since it is fixed by welding, the bonding strength is increased, and dropout due to peeling or the like can be suppressed.

  Hereinafter, embodiments of the present invention are shown in FIGS. FIG. 1 is a sectional view showing a switch using a sheet with a click spring of the present invention, FIG. 2 is an exploded perspective view showing a sheet with a click spring of the present invention and a circuit board, and FIG. 3 is a click of the present invention with a protective sheet. FIG. 4 is a cross-sectional view showing a switch using a sheet with a click spring of the present invention in which a light emitting sheet is laminated, FIG. 5 is an explanatory view showing a laser process of the sheet with a click spring of the present invention, FIG. 6 is an explanatory view showing an ultrasonic process of the sheet with a click spring of the present invention.

  As shown in FIGS. 1 and 2, the sheet with a click spring and the switch using the same according to the present invention are adhered to the sheet member 1 having a convex pressing force transmission member 2 and the lower surface side of the sheet member 1. A click spring 4 attached and held by an agent, a spacer 5 having a hole for accommodating the click spring 4 and attached to the lower surface side of the sheet member 1, and a plurality of fixed contacts 7 are provided. The circuit board 6 is mainly configured.

  The sheet member 1 is formed of a flexible and transparent film material made of, for example, PET (polyethylene terephthalate). Further, on the upper surface side of the sheet member 1, a convex pressing force transmission member 2 which is also made of PET or the like is provided. The pressing force transmitting member 2 is formed by fixing a small piece of transparent insulating resin material in a convex shape on the upper surface side of the sheet member 1 by a method such as laser welding or ultrasonic welding. Further, a pressure-sensitive adhesive made of an adhesive or the like is applied to the lower surface side of the sheet member 1. This pressure-sensitive adhesive is made of a resin adhesive having viscosity, and is applied over the entire lower surface of the sheet member 1.

  Further, on the lower surface side of the sheet member 1, a click spring 4 is attached and held on an adhesive. The click spring 4 is made of a conductive thin metal plate having spring properties, and is formed in a circular shape having a dome-shaped bulged portion 4a that can be reversed. Further, a plurality of (three in this embodiment) projections 4b are formed on the lower surface side of the bulging portion 4a, and when the clock spring 4 is pressed and the bulging portion 4a is inverted, the projection 4a becomes a circuit. The central contact 7 a of the plurality of fixed contacts 7 disposed on the upper surface of the substrate 6 is brought into contact. Further, the circular outer peripheral edge 4 c of the click spring 4 is placed on the circuit board 6 in a state where it is always in contact with the peripheral contact 7 b of the fixed contact 7.

  The spacer 5 is formed from a film-like material made of PET or the like. A circular hole 5 a is formed in the spacer 5, and the spacer 5 is adhered to the lower surface side of the sheet member 1 with an adhesive while the click spring 4 is accommodated in the hole 5 a. Also, an adhesive made of adhesive or the like is applied to the lower surface side of the spacer 5, and the spacer 5 with the sheet member 1 attached to the upper surface side is attached to the upper surface of the circuit board 6 by this adhesive. Are stacked.

  The circuit board 6 is made of a laminated plate such as phenol resin, and a plurality of fixed contacts 7 are arranged on the upper surface side of the circuit board 6. The fixed contact 7 is formed by printing of conductive silver, carbon, or the like, and is formed of a pair of central contacts 7a and peripheral contacts 7b disposed to face each other.

  On the pair of fixed contacts 7, the outer peripheral edge 4c of the click spring 4 is always in contact with the peripheral contact 7b, and the protrusion (contact) 4b on the lower surface side of the bulging portion 4a is opposed to the central contact 7a. The switch 5 using the sheet with the click spring is configured by the spacer 5 having the sheet member 1 stuck on the circuit board 6 being stuck with the adhesive and laminated. ing.

Thus, the sheet | seat with a click spring of this invention and the switch using the same are comprised.
For this reason, the pressing force transmission member 2 can reliably transmit the pressing force to the click spring 4 to obtain a good click feeling, and the sheet member 1 and the pressing force transmission member 2 are fixed by welding so that the bonding strength is obtained. Is increased, and can be prevented from falling off due to peeling or the like.

  In the above-described embodiment, the sheet member 1, the pressing force transmission member 2, the click spring 4, and the spacer 5 that are integrally attached with an adhesive constitute a sheet with a click spring. The sheet member 1 may be directly attached to the upper surface of the circuit board 6 with an adhesive without using the spacer 5.

Next, the manufacturing method of the said sheet | seat with a click spring is demonstrated.
First, the pressing force transmission member 2 formed in a convex shape is fixed to one surface (upper surface side) of the sheet member 1 by a method such as laser welding or ultrasonic welding.

FIG. 5 shows a process at the time of laser welding. A pressing force transmitting member 2 made of a small transparent insulating resin material is supplied to a predetermined position on the upper surface of the transparent sheet member 1, and the sheet member 1 and the pressing member are pressed. The pressure transmission member 2 is overlapped and irradiated with laser light (not shown) while being pressed and adhered by the light-transmitting pressure members 11 and 12, thereby welding the overlapping portion P to the sheet member 1. The pressing force transmission member 2 is fixed.
Next, a viscous adhesive made of an adhesive or the like is applied to the lower surface side of the sheet member 1. In this case, the adhesive is applied to the entire lower surface of the sheet member 1.

Next, the surface top portion of the bulging portion 4a of the click spring 4 is opposed to the pressing force transmission member 2 at the lower surface side position of the sheet member 1 to which the adhesive is applied, to which the pressing force transmission member 2 is fixed. The click spring 4 is held on the lower surface side of the sheet member 1 by pasting with an adhesive.
Then, the lower surface side of the sheet member 1 and substantially the entire surface of the bulging portion 4 a of the click spring 4 are brought into an adhesive state by the adhesive 3.

Thereby, a sheet with a click spring in which the click spring 4 is held on the lower surface side of the sheet member 1 is formed.
According to the manufacturing method of a sheet with a click spring as described above, the sheet member 1 and the pressing force transmission member 2 can be reliably adhered by laser light, and the processing speed can be improved.

FIG. 6 shows a process at the time of ultrasonic welding. A pressing force transmission member 2 made of a small insulating resin material is supplied to a predetermined position on the upper surface of the sheet member 1, and the sheet member 1 and the pressing force transmission member 2 are supplied. In such a state that the ultrasonic welding members 13 and 14 are pressed and brought into pressure contact with each other, the overlapping portion P is welded and the pressing force transmitting member 2 is fixed to the sheet member 1.
Next, a viscous adhesive made of an adhesive or the like is applied to the lower surface side of the sheet member 1. In this case, the adhesive is applied to the entire lower surface of the sheet member 1.

Next, the surface top portion of the bulging portion 4a of the click spring 4 is opposed to the pressing force transmission member 2 at the lower surface side position of the sheet member 1 to which the adhesive is applied, to which the pressing force transmission member 2 is fixed. The click spring 4 is held on the lower surface side of the sheet member 1 by pasting with an adhesive.
Then, the lower surface side of the sheet member 1 and substantially the entire surface of the bulging portion 4 a of the click spring 4 are brought into an adhesive state by the adhesive 3.

Thereby, a sheet with a click spring in which the click spring 4 is held on the lower surface side of the sheet member 1 is formed.
According to the manufacturing method of a sheet | seat with a click spring mentioned above, contact | adherence with the sheet | seat member 1 and the pressing force transmission member 2 can be performed reliably by ultrasonic welding, and a processing speed can be improved. In addition, after the pressing force transmission member 2 is fixed to the sheet member 1, the adhesive is applied to the sheet member 1, so that the contact height with the ultrasonic welding members 13 and 14 is increased by applying the adhesive in a subsequent process. The variation in thickness can be reduced, and welding can be performed reliably.

FIG. 2 shows a sheet with a click spring in which a sheet member 1 is formed of a common sheet member, and a plurality of sets of pressing force transmission members 2 and click springs 4 are held on the sheet member 1 in a matrix. And the structure of a switch is shown.
In this case, since the plurality of click springs 4 can be handled integrally by being held on the common sheet member 1, workability is improved in the assembling process or the like.

Moreover, FIG. 3 has shown the structure of the sheet | seat with a click spring with a protection sheet.
In this case, a film-like protective sheet 9 made of PET or the like is attached to the lower surface side of the spacer 5 so as to close the hole 5a accommodating the click spring 4. This protective sheet 9 is affixed to the lower surface side of the spacer 5 with an adhesive applied to prevent dust or foreign matter from entering the protrusions (contact points) 4b of the click spring 4 during transportation. It has become. The protective sheet 9 is peeled off from the lower surface of the spacer 5 in the assembly process.

FIG. 4 shows a configuration of a switch using a sheet with a click spring in which light emitting sheets for displaying functions and the like are stacked.
In this case, a film-like light emitting sheet 10 made of PET or the like for forming a light emitting layer made of EL or the like is provided on the lower surface side of the sheet member 1. The light emitting sheet 10 for function display is attached to the lower surface side of the sheet member 1 with an adhesive or the like and laminated integrally. The upper surface of the bulging portion 4a of the click spring 4 is formed on the lower surface side of the light emitting sheet 10. Is pasted and held.

  Thus, in the said Example, the sheet | seat member 1 and the pressing force transmission member 2 are formed with a translucent synthetic resin material, and the light emitting sheet which consists of a sheet-like surface light emitting member (EL) on the lower surface side of the sheet member 1 10 is laminated and the click spring 4 is held on the light emitting sheet 10, so that the light emitting function of the surface light emitting material (EL) is achieved by forming the sheet member 1 and the pressing force transmitting member 2 with a light transmitting synthetic resin. Since there is no hindrance, a sheet with a click spring with an illumination function can be easily obtained.

According to the configuration of the clicked sheet and switch of the present invention described above, the sheet member 1 and the pressing force transmission member 2 are formed of a synthetic resin material that can be welded together, and the sheet member 1 and the pressing force transmission member 2 are Since the overlapping portion P is welded by irradiating the overlapping portion P with a laser or applying ultrasonic waves, the sheet member 1 and the pressing force transmitting member 2 are fixed. As compared with the conventional method of fixing the pressing force transmitting member 2 to the sheet member 1, the processing speed can be improved, the manufacturing can be easily performed, and the manufacturing method can be provided at a low cost.
Further, since the sheet member 1 and the pressing force transmission member 2 are formed of the same type of synthetic resin material (for example, PET), the strength at the time of joining can be increased.

It is sectional drawing which shows the switch using the sheet | seat with a click spring of this invention. It is a disassembled perspective view which shows the sheet | seat with a click spring of this invention, and a circuit board. It is a perspective view which shows the sheet | seat with a click spring with a protection sheet of this invention. It is sectional drawing which shows the switch using the sheet | seat with a click spring which laminated | stacked the light emission sheet | seat of this invention. It is explanatory drawing which shows the laser process of the sheet | seat with a click spring of this invention. It is explanatory drawing which shows the ultrasonic process of the sheet | seat with a click spring of this invention. It is a perspective view which shows the sheet | seat with the conventional click spring. It is sectional drawing which shows the conventional sheet | seat with a click spring.

Explanation of symbols

1: sheet member 2: pressing force transmission member 4: click spring 4a: bulging portion 4b: protrusion (contact)
4c: Outer peripheral edge 5: Spacer 5a: Hole 6: Circuit board 7: Fixed contact 7a: Center contact 7b: Peripheral contact 9: Protection sheet 10: Light emitting sheet 11: Pressurizing member 12: Pressurizing member 13: Ultrasonic welding Member 14: Ultrasonic welding member

Claims (7)

  A sheet member, a click spring held on one surface side of the sheet member, and a pressing force that is provided on the other surface of the sheet member facing the click spring and transmits a pressing force to the click spring A transmission member, wherein the sheet member and the pressing force transmission member are formed of a synthetic resin material that can be welded to each other, and a laser is applied to an overlapping portion of the sheet member and the pressing force transmission member, or A sheet with a click spring, wherein the sheet member and the pressing force transmission member are fixed by applying an ultrasonic wave to weld the overlapping portion.   The seat with a click spring according to claim 1, wherein the sheet member and the pressing force transmission member are formed of the same type of synthetic resin material.   The sheet member and the pressing force transmission member are formed of a translucent synthetic resin material, and a light emitting sheet made of a sheet-like surface light emitting member is laminated on one surface side of the sheet member, and the click spring is provided on the light emitting sheet. The sheet with a click spring according to claim 1 or 2, wherein the sheet is held.   A pressing force transmission member made of a small piece resin is supplied to a predetermined position of the sheet member, and the sheet member and the pressing force transmission member are overlapped and irradiated with laser light while being pressed and adhered by a translucent pressure member. By doing so, the overlapping portion is welded and the pressing force transmission member is fixed to the sheet member, and then the click spring is held on the sheet member by an adhesive corresponding to the pressing force transmission member. The manufacturing method of the sheet | seat with a click spring characterized by these.   A pressing force transmission member made of a small piece resin is supplied to a predetermined position of the sheet member, and in a state where the sheet member and the pressing force transmission member are overlapped, the ultrasonic welding member is pressed and brought into pressure contact with each other. The overlapping portion is welded and the pressing force transmission member is fixed to the sheet member, and then the click spring is held on the sheet member by an adhesive in correspondence with the pressing force transmission member. A manufacturing method of a sheet with a click spring.   6. The method for manufacturing a sheet with a click spring according to claim 5, wherein the pressure-sensitive adhesive is applied to the sheet member after the pressing force transmission member is fixed to the sheet member.   A sheet with a click spring according to claim 1 and a circuit board provided with a pair of opposed fixed contacts, wherein the click spring and the fixed contact are opposed to each other. And a switch laminated on the circuit board.

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