JP3178598U - Push button switch - Google Patents

Abstract

A push button switch is provided which can be easily changed to a pusher having a different thickness.
A pushbutton switch 100 includes a movable contact member 1, a base 2 having a fixed contact portion 3 with which the movable contact member 1 contacts, a protective sheet 4 attached to the base 2 and covering the movable contact member 1. A pusher 5 welded to the protective sheet 4 at a position corresponding to the movable contact member 1, the pusher 5 being welded to the protective sheet 4 by light, and a transmitting part that transmits light. 5b is laminated. As a result, when the thickness dimension of the pusher 5 is changed, only the thickness dimension of the transmission portion 5b can be changed, so even if the thickness dimension of the pusher 5 is changed, the light for welding is changed. There is no need to change the irradiation conditions each time.
[Selection] Figure 2

Description

  The present invention relates to a pushbutton switch in which a pusher is integrated with a protective sheet, and more particularly to a pushbutton switch with good productivity even if the thickness of the pusher changes.

  Recently, there is a push button switch used as an operation switch of an electronic device in which a pusher pressed by an operation member of an attached electronic component is integrated with a protective sheet. Such a push button switch is required to respond by changing the thickness of the pusher according to the electronic device to be attached.

  As such a conventional push button switch, a push button switch described in Patent Document 1 below is known. Hereinafter, the pushbutton switch described in Patent Document 1 will be described with reference to FIG. FIG. 7 is a cross-sectional view showing the structure of the push button switch 900 in Patent Document 1. In FIG. The push button switch 900 described in Patent Literature 1 is provided on the other surface of the sheet member 910, the click spring 940 held on one surface side of the sheet member 910, and the click spring 940 facing each other. And a pressing force transmission member 920 that transmits a pressing force to the click spring 940. The sheet member 910 and the pressing force transmission member 920 are formed of a synthetic resin material that can be welded to each other, and the overlapping portion P of the sheet member 910 and the pressing force transmission member 920 is irradiated with a laser or an ultrasonic wave is applied. Thus, the overlapping portion P is welded to fix the sheet member 910 and the pressing force transmission member 920.

JP 2006-344511 A

  The push button switch 900 described in Patent Document 1 can be switched to an optimum height for an electronic device to be attached by preparing a plurality of types of pressing force transmission members 920 having different thicknesses and changing the thickness. However, if the thickness of the pressing force transmission member 920 is changed according to the demand, the heat storage capacity of the pressing force transmission member 920 changes. Therefore, the intensity of the laser beam, the irradiation time, etc. according to the thickness of the pressing force transmission member 920 It was difficult to improve productivity.

  The present invention solves the above-described problems and provides a push button switch with good productivity even when the thickness of the pusher such as the push force transmitting member 920 changes.

  The pushbutton switch according to claim 1 includes a movable contact member, a base having a fixed contact portion with which the movable contact member contacts, a protective sheet attached to the base and covering the movable contact member, and the protective sheet The presser is characterized in that it is formed by laminating a welded part welded by light and a transmission part that transmits light.

  The push button switch according to claim 2 is characterized in that the welded portion is black or dark and the transmissive portion is transparent or translucent.

  The pushbutton switch according to claim 3 is characterized in that the pusher is formed of a material made of polyetheretherketone.

  The pushbutton switch according to claim 4, wherein the protective sheet is formed with an adhesive layer that affixes the protective sheet to the base on a surface facing the movable contact member. Between the movable contact members, a cover member is arranged at least at a part corresponding to the movable contact member.

  According to the invention of claim 1, the pusher is formed by laminating a welded portion welded by light irradiation and a light transmissive portion so that the welded portion welded by laser light or the like is formed. It is possible to make the thickness constant and adjust the thickness of the transmissive part according to requirements. As a result, even if the thickness of the pusher is changed, the thickness of the welded portion does not change, so the heat storage capacity of the pusher does not change, and there is no need to change the irradiation condition of the laser beam. Therefore, even if there are multiple types of requests for the thickness of the pusher, there is no need to adjust the laser light irradiation conditions each time. Can be provided.

  According to the second aspect of the present invention, heat can be efficiently absorbed by making the color of the welded portion black or dark, and light can be transmitted and heat by making the color of the transmissive portion transparent or translucent. It becomes difficult to absorb. Therefore, even if the thickness of the pusher changes, the heat storage capacity of the pusher is less likely to fluctuate, and adjustment of the laser light irradiation conditions is no longer necessary. There is an effect that a push button switch can be provided.

  According to the invention of claim 3, by forming the pusher with polyether ether ketone having good heat resistance, it becomes difficult to deform even when placed in a high temperature environment. Therefore, it is possible to provide a push button switch that can cope with a high temperature environment such as reflow soldering.

  According to the invention of claim 4, by disposing the cover member at a position corresponding to the movable contact member between the protective sheet and the movable contact member, the movable contact member becomes difficult to stick to the protective sheet. When the protective sheet and the movable contact member are adhered, the protective sheet and the movable contact member interfere with each other's operation, and the operator of the push button switch may feel that the operation feeling is bad, such as being caught. Since the protective sheet is less likely to stick to the movable contact member, it is possible to provide a push button switch that does not get caught and has a good operation feeling.

  As described above, according to the present invention, the thickness of the welded part is made constant by forming the pusher by laminating the welded part welded by light irradiation and the light transmitting part. It is possible to adjust the thickness of the sheet to meet the requirements. As a result, even if the thickness of the pusher changes, the heat storage capacity of the welded portion does not change, so there is no need to adjust the irradiation conditions such as laser light according to the thickness of the pusher. Even if it changes, a push button switch with good productivity can be provided.

It is a figure which shows the external appearance of the pushbutton switch 100 in 1st Embodiment. It is a disassembled perspective view which shows the structure of the pushbutton switch 100 in 1st Embodiment. It is sectional drawing which shows the pusher 5 cut | disconnected by the cross section II shown in FIG.1 (b). It is sectional drawing which shows the state which cut | disconnected the pushbutton switch 100 in the cross section II described in FIG.1 (b). It is sectional drawing which shows the pusher 5 whose thickness dimension cut | disconnected by the cross section II shown in FIG.1 (b) is t3. It is a disassembled perspective view which shows the structure of the pushbutton switch 100 shown when the shape of the cover member 6 differs from the shape in FIG. 6 is a cross-sectional view showing a structure of a push button switch 900 in Patent Document 1. FIG.

[First Embodiment]
The push button switch 100 in the first embodiment will be described below. First, the configuration of the pushbutton switch 100 in the present embodiment will be described with reference to FIGS. 1 to 3. FIG. 1 is a view showing the appearance of the pushbutton switch 100 in the first embodiment, FIG. 1A is a perspective view showing the appearance of the pushbutton switch 100, and FIG. 1B shows the appearance of the pushbutton switch 100. It is a top view. FIG. 2 is an exploded perspective view showing the configuration of the pushbutton switch 100 in the first embodiment. FIG. 3 is a cross-sectional view showing a state in which the pusher 5 is cut at the cross-section II shown in FIG.

  The push button switch 100 has an appearance as shown in FIG. 1. As shown in FIG. 2, the push button switch 100 has a movable contact member 1, a base 2 having a fixed contact portion 3 with which the movable contact member 1 contacts, and a base 2. A protective sheet 4 that is attached and covers the movable contact member 1, a pusher 5 welded to the protective sheet 4, and a cover member 6 that prevents excessive adhesion between the movable contact member 1 and the protective sheet 4 are provided.

  The movable contact member 1 is made of a conductive metal plate, and has a bulging portion 1a that protrudes in a substantially spherical shape toward one side at the center. When the bulging portion 1a is pressed from the protruding direction, it can be reversed after bending in the pressed direction.

  The base 2 is made of a synthetic resin material and has a substantially rectangular parallelepiped shape. The base 2 has an accommodating portion 2a formed in a concave shape and capable of accommodating the movable contact member 1 therein on the upper surface, which is a surface on the Z1 direction side in FIG. The fixed contact portion 3 is exposed on the inner bottom surface of the housing portion 2a. Further, first connection terminal portions 3c made of a metal plate are formed to protrude on the Y2 direction side of the side surface of the base 2 in the X1-X2 direction, and the Y1 direction of the side surface of the base 2 in the X1-X2 direction On the side, a second connection terminal portion 3d made of a metal plate is formed so as to protrude. The first connection terminal portion 3c and the second connection terminal portion 3d can be electrically connected to the outside.

  The fixed contact portion 3 is made of a conductive metal plate, and a part thereof is exposed to the inner bottom surface of the housing portion 2 a of the base 2 and is formed integrally with the base 2. The fixed contact portion 3 is formed at a position facing the first fixed contact portion 3a formed at the center of the inner bottom surface of the housing portion 2a and the first fixed contact portion 3a on the inner bottom surface of the housing portion 2a. The second fixed contact portion 3b. In the present embodiment, the second fixed contact portion 3b is formed in the vicinity of the outer peripheral end of the accommodating portion 2a on the imaginary straight line that is parallel to the X1-X2 direction and passes through the first fixed contact portion 3a. The first fixed contact portion 3a and the second fixed contact portion 3b are not electrically connected. The first fixed contact portion 3a and the first connection terminal portion 3c are electrically connected, and the second fixed contact portion 3b and the second connection terminal portion 3d are also electrically connected.

  The pusher 5 is made of a synthetic resin material and is formed in a substantially cylindrical shape. As shown in FIG. 3, the pusher 5 is formed by laminating a welding portion 5 a that can be welded by light and a transmission portion 5 b that transmits light. In this embodiment, polyether ether ketone (Polyetheretherketone) is used. , Hereinafter referred to as PEEK), the welded portion 5a is colored black or dark, and the transmissive portion 5b is transparent or translucent.

  The protective sheet 4 is made of a synthetic resin material having translucency, is formed in a sheet shape, and has a size that can cover the accommodating portion 2 a of the base 2. In this embodiment, the protective sheet 4 is made of PEEK, which is the same material as the pusher 5. Further, an adhesive layer 4 a made of an adhesive and having an adhesive force is formed on one surface of the protective sheet 4.

  In addition, although the pusher 5 and the protection sheet 4 were demonstrated separately, actually, the pusher 5 and the protection sheet 4 are used in the state formed integrally. As shown in FIG. 3, the pusher is located at the center of the back surface of the protective sheet 4 having the adhesive layer 4 a, that is, at a position corresponding to the movable contact 1 when the protective sheet 4 is attached to the base 2. 5 is arrange | positioned so that the welding part 5a and the protection sheet 4 may contact. As shown by the arrow L shown in FIG. 3, the pusher 5 disposed on the protective sheet 4 is irradiated with laser light from the Z2 direction through the protective sheet 4 to the welding portion 5a. Since the welded portion 5a irradiated with the laser beam is colored black or dark, it does not transmit the laser beam. Therefore, the welded portion 5a is melted by the heat of the laser beam, the vicinity of the portion A surrounded by the broken line shown in FIG. 3 is welded, and the pusher 5 and the protective sheet 4 are integrally formed.

  The cover member 6 is made of a synthetic resin material, is formed in a sheet shape, and has a size that fits inside the housing portion 2 a of the base 2. In the present embodiment, the cover member 6 is made of PEEK, which is the same material as the pusher 5. Further, in the present embodiment, the cover member 6 has substantially the same shape and the same size as the movable contact member 1 when viewed from the Z1 direction in FIG.

  Next, the structure of the pushbutton switch 100 will be described with reference to FIG. 4 is a cross-sectional view showing a state in which the pushbutton switch 100 is cut along a cross-section II shown in FIG. 1B, and FIG. 4A is a cross-sectional view showing the pushbutton switch 100 in an initial state. 4 (b) is a cross-sectional view showing the push button switch 100 in a state where a pressing operation is received.

  The movable contact member 1 is disposed inside the accommodating portion 2a of the base 2 with the bulging portion 1a facing upward in the Z1 direction. At this time, the outer peripheral end of the movable contact member 1 contacts the second fixed contact portion 3b, and the movable contact member 1 and the second fixed contact portion 3b are electrically connected. The protective sheet 4 integrally formed with the pusher 5 is disposed on the base 2 so that the protective sheet 4 covers the storage part 2a with the adhesive layer 4a and the storage part 2a facing each other. The protective sheet 4 is held by being attached to the base 2. At this time, a cover member 6 is attached to at least a part of the adhesive layer 4 a corresponding to the movable contact member 1, and the cover member 6 is attached to the adhesive layer 4 a of the protective sheet 4 and the movable contact member 1. Between the two. In the present embodiment, the cover members 6 are disposed at almost all locations corresponding to the movable contact member 1. The push button switch 100 is formed in such a structure.

  Next, the operation of the push button switch 100 will be described with reference to FIG. As shown in FIG. 4A, in the initial state of the pushbutton switch 100 that has not been subjected to the pressing operation, the first fixed contact portion 3a and the second fixed contact portion 3b are not electrically connected. Next, as shown in FIG. 4B, when the push button switch 100 is pressed in the Z2 direction by, for example, a pressing member OP that is a component of the electronic device, the pusher 5 is protected. The movable contact member 1 is pressed in the Z2 direction via the sheet 4 and the cover member 6. The movable contact member 1 pressed in the Z2 direction is reversed in the Z2 direction after the bulging portion 1a is bent in the Z2 direction, and comes into contact with the first fixed contact portion 3a. When the movable contact member 1 and the first fixed contact portion 3a come into contact with each other, the first fixed contact portion 3a and the second fixed contact portion 3b are electrically connected. When the pressing on the pusher 5 is released, the push button switch 100 returns to the initial state shown in FIG. 4A, and the electrical connection between the first fixed contact portion 3a and the second fixed contact portion 3b. Disappears. In this way, the electrical connection state between the first fixed contact portion 3a and the second fixed contact portion 3b is switched and output to the outside via the first connection terminal portion 3c and the second connection terminal portion 3d. Thus, it functions as a push button switch.

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

  In the pushbutton switch 100 according to the present embodiment, the movable contact member 1, the base 2 having the fixed contact portion 3 with which the movable contact member 1 contacts, the protective sheet 4 attached to the base 2 and covering the movable contact member 1, A pusher 5 welded to the protective sheet 4, and the pusher 5 is formed by laminating a welded portion 5a welded by light and a light transmitting portion 5b. did.

  Thereby, the thickness 5 of the pusher 5 is set to be a structure in which the pusher 5 is formed by laminating the welded portion 5a that is welded by light irradiation and the transmitting portion 5b that transmits light. As shown in FIG. 3, it is a value obtained by adding the thickness dimension t1 of the welded portion 5a and the thickness dimension t2 of the transmitting portion 5b. When the thickness dimension t0 is changed according to various requirements, the member corresponding to the pusher 5 is formed of only the same material as the welded portion 5a in the prior art. It will change. Therefore, unless the laser light irradiation conditions are changed each time, the member corresponding to the pusher 5 is not melted and cannot be welded, or it is melted too much and a hole is formed. With the configuration of this embodiment, when the thickness dimension t0 of the pusher 5 is changed, the thickness dimension t1 of the welded part 5a that is welded by laser light or the like is made constant, and the thickness dimension of the transmitting part 5b is set. It becomes possible to adjust t2 according to a request | requirement. For example, the case where the thickness 5 is formed to be twice the thickness t3 of the pusher 5 shown in FIG. 3 will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing the pusher 5 having a thickness dimension t3 cut along a cross-section II shown in FIG. In FIG. 3, the thickness dimension t1 of the welded part 5a and the thickness dimension t2 of the transmission part 5b are illustrated with substantially the same thickness dimension. As shown in FIG. 5, when the thickness dimension t0 of the pusher 5 is formed to a thickness dimension t3 that is twice the thickness dimension t0 of the pusher 5 in FIG. 3, the thickness dimension t1 of the welded portion 5a is as shown in FIG. This can be dealt with by changing the thickness dimension t2 of the transmission part 5b in FIG. 3 to a thickness dimension t4 that is three times the thickness without changing from the state of 3. As a result, even if the thickness of the pusher 5 is changed, the heat storage capacity of the welded portion 5a welded by laser light or the like does not change, so there is no need to change the laser light irradiation conditions. Therefore, even if the thickness of the pusher changes, it is possible to provide a push button switch with good productivity.

  Further, the push button switch 100 of the present embodiment is configured such that the welded portion 5a is black or dark and the transmissive portion 5b is transparent or translucent.

  This makes it easy to efficiently absorb heat by setting the color of the welded portion 5a to black or dark, and makes it difficult to absorb heat by transmitting light by making the color of the transmissive portion 5b transparent or translucent. Become. Therefore, it can prevent more reliably that the heat storage capacity | capacitance of the pusher 5 fluctuates because the thickness dimension t2 of the permeation | transmission part 5b changes. Therefore, even if the thickness of the pusher changes, the heat storage capacity of the pusher is less likely to fluctuate, and adjustment of the laser light irradiation conditions is no longer necessary. There is an effect that a push button switch can be provided.

  Further, in the pushbutton switch 100 of the present embodiment, the pusher 5 is formed of a material made of PEEK.

  Thereby, by forming the pusher 5 with PEEK having good heat resistance, it becomes difficult to be deformed even when left in a high temperature environment. There is an effect that it is possible to provide a push button switch that can cope with a high temperature environment such as reflow soldering.

  Further, in the pushbutton switch 100 of the present embodiment, the protective sheet 4 is formed with an adhesive layer 4 a for attaching the protective sheet 4 to the base 2 on the surface facing the movable contact member 1. Between the layer 4 a and the movable contact member 1, the cover member 6 is disposed at least at a part corresponding to the movable contact member 1.

  Thereby, the movable contact member 1 becomes difficult to stick to the protective sheet 4 by disposing the cover member 6 at a position corresponding to the movable contact member 1 between the protective sheet 4 and the movable contact member 1. When the protective sheet 4 and the movable contact member 1 are adhered, the protective sheet 4 and the movable contact member 1 interfere with each other's operation, and the operator of the push button switch may feel that the operation feeling is bad, for example, the operator feels a catch. . Since the protective sheet 4 is less likely to stick to the movable contact member 1, there is an effect that it is possible to provide a pushbutton switch that does not get caught and has a good operation feeling.

  Further, in the present embodiment, the cover member 6 has substantially the same shape and the same size as the movable contact member 1 when viewed in a plan view from the Z1 direction in FIG. Thereby, it can prevent almost certainly that the movable contact member 1 and the protection sheet 4 adhere. Therefore, there is an effect that it is possible to provide a push button switch that has no feeling of being caught and has a better operation feeling.

  Moreover, in the pushbutton switch 100 of this embodiment, the protective sheet 4, the pusher 5, and the cover member 6 were formed using the same material PEEK. As a result, when the push button switch 100 is disposed in a high temperature environment such as a reflow soldering process, and the protective sheet 4, the pusher 5 and the cover member 6 are thermally expanded, the thermal expansion coefficient is the same. There are no members with different ways of expansion. Therefore, it is difficult to generate a portion where stress is concentrated due to thermal expansion, and damage or peeling due to stress concentration is unlikely to occur. Therefore, it is possible to provide a push button switch that can be reliably handled by reflow soldering.

  As described above, the pushbutton switch according to the embodiment of the present invention has been specifically described. However, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the invention. Is possible. For example, the present invention can be modified as follows, and these embodiments also belong to the technical scope of the present invention.

  (1) In this embodiment, the base 2 is made of a synthetic resin material and includes a fixed contact portion 3 and is formed in a substantially rectangular parallelepiped shape. However, the base 2 includes the fixed contact portion 3 and has a flat plate shape. The structure formed in may be sufficient. For example, the base 2 is a printed circuit board, the fixed contact portion 3 is provided on the printed circuit board by pattern wiring, the movable contact member 1 is disposed on the printed circuit board corresponding to the fixed contact portion 3, and the movable contact member 1 is pressed. 5 and the cover member 6 may be configured to be held on the printed circuit board so as to be covered with the protective sheet 4 formed integrally.

  (2) In the present embodiment, the protective sheet 4, the pusher 5 and the cover member 6 are formed using PEEK made of the same material. However, in applications that are not arranged in a high temperature environment such as a reflow soldering process. When used, they may be formed of different materials. For example, the heat resistance may be lower than PEEK, and the cost may be reduced by using a cheaper material.

  (3) In the present embodiment, the cover member 6 is configured to have substantially the same size as the movable contact member 1, but the cover member 6 is partially attached to the extent that the mutual operation of the cover member 6 and the movable contact member 1 is not hindered. In this way, a part of the cover member 6 may be deleted. FIG. 6 is an exploded perspective view showing the configuration of the pushbutton switch 100 when the shape of the cover member 6 is different from the shape in FIG. 2. For example, as shown in FIG. It is good also as a structure which provides the part X and a part of the bulging part 1a of the movable contact member 1 adheres to the protection sheet 4. FIG.

DESCRIPTION OF SYMBOLS 1 Movable contact member 1a Bulging part 2 Base 2a Housing | casing part 3 Fixed contact part 3a 1st fixed contact part 3b 2nd fixed contact part 3c 1st connection terminal part 3d 2nd connection terminal part 4 Protection sheet 4a Adhesive layer 5 Push Child 5a Welding part 5b Transmission part 6 Cover member 100 Pushbutton switch

Claims (4)

A movable contact member;
A base having a fixed contact portion with which the movable contact member contacts;
A protective sheet affixed to the base and covering the movable contact member;
A pusher welded to the protective sheet at a position corresponding to the movable contact member,
The push button switch, wherein the pusher is formed by laminating a welded portion welded to the protective sheet by light and a transmissive portion that transmits light.   The push button switch according to claim 1, wherein the welded portion is black or dark and the transmissive portion is transparent or translucent.   The pushbutton switch according to claim 1 or 2, wherein the pusher is made of a material made of polyetheretherketone. In the protective sheet, an adhesive layer is formed on the surface facing the movable contact member, and the adhesive sheet is attached to the base.
2. The pushbutton according to claim 1, wherein a cover member is disposed between at least a part corresponding to the movable contact member between the adhesive layer of the protective sheet and the movable contact member. switch.

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