JP2012124074A - Member for push button switch, key panel, electronic apparatus and method of manufacturing member for push button switch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a member for a push button switch which can suppress destruction of a decorative layer even if key push operation is repeated over a long period of time, and also facilitates thinning of the push button switch, when the decorative layer is provided between a key top and a base sheet.SOLUTION: The member for the push button switch includes a key top 20A. On a non-operation surface 22B of the key top 20A, a decorative layer 30, an adhesion layer 40A, a base sheet 50 and a pusher 60 are provided in this order, and the hardness of the pusher 60 is smaller than that of the base sheet 50. A key panel and an electronic apparatus using the member for the push button switch, and a method of manufacturing the member for the push button switch are provided.

Description

  The present invention relates to a member for a push button switch, a key panel, an electronic device, and a method for manufacturing the member for a push button switch.

  Patent Document 1 has a key base body having a first sheet having flexibility and elasticity, and a second sheet that is harder than the first sheet and disposed on the back surface of the first sheet. A key base (a member for a push button switch) in which a child layer is formed integrally with the second sheet on the back surface of the second sheet has been proposed. In this key base, since the pusher layer is formed on the second sheet, the deformation of the key base body can be reduced as compared with the case where the pusher layer is formed on the first sheet.

WO2008 / 146556 (Claim 1, paragraph number 0013, etc.)

  However, in the member for a pushbutton switch described in Patent Document 1, the color of an area constituting characters, symbols, or the like is displayed between the key top and the key base body, or the background of these characters, symbols, etc. When the decoration layer provided in order to display the color of the area | region used as is provided, the decoration layer may be destroyed and an external appearance may deteriorate by repeating pressing operation of a key. Such deterioration of the appearance becomes conspicuous especially when the push button switch member is thinned. The reason for this is that when the switch element that converts the key press operation into an electrical signal and the presser layer are in contact with each other, the pressing force applied to the presser layer is applied to the key base main body portion in the key base main body portion. This is considered to be because it is easily transmitted directly to the decorative layer positioned immediately above the presser layer without being dispersed in the plane direction.

  In order to suppress such appearance deterioration, in order to disperse and absorb the pressing force applied to the presser layer, a soft material such as a urethane resin is provided between the key base body and the decorative layer. It is effective to provide a layer (impact absorbing layer) whose main purpose is to absorb the impact composed of However, in order to cope with the reduction in thickness and cost of portable electronic devices such as mobile phones that use the member for push button switches, there is a further demand for reduction in thickness and cost of the members for push button switches. In order to meet such needs for thinning and cost reduction, layers and members that are the minimum necessary for exhibiting the essential functions of pushbutton switch members; that is, key tops, decorative layers, adhesive layers, base sheets and It can be said that there is little room to provide layers and members other than the pusher. In particular, in order for the shock absorbing layer to exhibit its function, a certain amount of thickness is required in addition to the constituent materials being as soft as possible. Therefore, providing the shock absorbing layer completely contradicts the need for thinning.

  The present invention has been made in view of the above circumstances, and in the case where a decorative layer is provided between the key top and the base sheet, destruction of the decorative layer is suppressed even if the key pressing operation is repeated over a long period of time. It is an object of the present invention to provide a push button switch member that can be easily reduced in thickness, a key panel and an electronic device using the same, and a method for manufacturing the push button switch member.

  The above-mentioned subject is achieved by the following present invention. That is,

  The member for a push button switch of the present invention has a key top, and a decorative layer, an adhesive layer, a base sheet, and a pusher are laminated in this order on the non-operation surface of the key top. Is preferably smaller than the hardness of the base sheet.

  In one embodiment of the member for a push button switch of the present invention, the non-operation surface of the key top and the decorative layer are provided in contact with each other, the decorative layer and the adhesive layer are provided in contact with each other, and the adhesive layer and the base sheet Are preferably provided in contact with each other, and the base sheet and the pusher are provided in contact with each other.

  In another embodiment of the push button switch member of the present invention, one or more other layers are provided between the key top and the presser, and the total thickness of the one or more other layers is 0 μm. It is preferably greater than 50 μm.

  In another embodiment of the member for a push button switch of the present invention, the maximum thickness excluding the key top of the member for a push button switch is preferably 500 μm or less.

  In another embodiment of the member for a pushbutton switch of the present invention, the decorative layer preferably contains a resin, and the resin content in the decorative layer is preferably 80% by weight or less.

  In another embodiment of the push button switch member of the present invention, the thickness of the adhesive layer is preferably 90 μm or less.

  In another embodiment of the pushbutton switch member of the present invention, it is preferable that a value obtained by subtracting the hardness of the presser from the hardness of the base sheet is D20 or more.

  In another embodiment of the pushbutton switch member of the present invention, the combination of the material constituting the base sheet and the material constituting the pusher is a combination of a polyethylene terephthalate resin and a silicone resin, and a polycarbonate resin and a silicone resin. It is preferable that the combination is selected.

  The key panel of the present invention is characterized by including the push button switch member of the present invention.

  An electronic apparatus according to the present invention includes the push button switch member according to the present invention.

  In one embodiment of the electronic device of the present invention, the electronic device is preferably a mobile phone.

  The pushbutton switch member according to the first aspect of the present invention includes: (1) a decoration layer forming step of forming a decoration layer on the non-operation surface of the key top; and an uncured by printing an adhesive on the surface of the decoration layer A first adhesive layer forming step of forming a first adhesive layer in a state, and a key top, a decorative layer formed on a non-operation surface of the key top, and a decorative layer A first adherend including a first adhesive layer formed on the surface of the base sheet is manufactured, and (2) a presser having a hardness lower than that of the base sheet is formed on one side of the base sheet by integral molding. Presser forming step and second adhesive layer forming step of forming an uncured second adhesive layer by printing an adhesive on the surface of the base sheet opposite to the surface on which the presser is formed And through at least a base sheet and a presser formed on one side of the base sheet, A second adherend including a second adhesive layer formed on the surface opposite to the surface on which the presser of the base sheet is formed, and (3) a first adherend The second adherend is bonded to the surface of the first adherend provided with the first adhesive layer and the surface of the second adherend provided with the second adhesive layer. A member for a push button switch is manufactured by performing at least a heating and pressurizing step of heating and pressurizing the laminated body obtained together.

  The member for a pushbutton switch according to the second aspect of the present invention includes (1) a key top and a non-operation surface of the key top by passing through at least a decoration layer forming step of forming a decoration layer on the non-operation surface of the key top. A first adherend including a decorative layer formed thereon, and (2) a presser forming step of forming a presser having a lower hardness than the base sheet by integral molding on one side of the base sheet. At least, a second adherend including a base sheet and a presser formed on one side of the base sheet is produced, and (3) a decorative layer for the first adherend is provided. In a state where a sheet-like adhesive member that expresses adhesiveness by heating and pressing is interposed between the provided surface and the surface opposite to the surface on which the pusher of the second adherend is provided, The laminated body obtained by bonding the first adherend and the second adherend is heated and pressurized. And hot pressing step, characterized by producing a member for a push button switch by passing through at least the.

The member for a push button switch of the third aspect of the present invention is (1) a key top and a non-operation surface of the key top by at least a decoration layer forming step of forming a decoration layer on the non-operation surface of the key top. A first adherend including a decorative layer formed thereon, and (2) a presser forming step of forming a presser having a lower hardness than the base sheet by integral molding on one side of the base sheet. At least, a second adherend including a base sheet and a presser formed on one side of the base sheet is produced, and (3) a decorative layer for the first adherend is provided. The first adherend is in a state in which an adhesive sheet-like adhesive member is interposed between the formed face and the face opposite to the face on which the pusher of the second adherend is provided. A laminating step of laminating the body and the second adherend,
The push button switch member is manufactured by passing through at least.

  According to the present invention, when a decorative layer is provided between the key top and the base sheet, the decorative layer can be prevented from being broken even if the key pressing operation is repeated over a long period of time, and the thickness can be reduced. An easy push button switch member, a key panel and an electronic device using the same, and a method of manufacturing the push button switch member can be provided.

It is a schematic cross section which shows an example of the member for pushbutton switches of this embodiment. It is a schematic cross section which shows the other example of the member for pushbutton switches of this embodiment. It is a schematic cross section which shows the other example of the member for pushbutton switches of this embodiment. It is a schematic cross section which shows an example of the manufacturing method of the member for pushbutton switches of 1st this embodiment. It is a schematic cross section which shows an example of the 1st to-be-adhered body used for manufacture of the member for pushbutton switches of this embodiment. It is a schematic cross section showing an example of a method for manufacturing a member for a push button switch according to the second embodiment and a method for manufacturing a member for a push button switch according to the third embodiment. It is a schematic cross section which shows an example of the member for pushbutton switches of this embodiment.

  The member for a push button switch according to the present embodiment has a key top, and a decorative layer, an adhesive layer, a base sheet, and a pusher are laminated in this order on the non-operation surface of the key top. The hardness of is characterized by being smaller than the hardness of the base sheet. For this reason, in the member for a push button switch according to the present embodiment, when the key pressing operation is repeated, the pressing force applied to the pusher portion that contacts the switch element is caused by the base sheet that is harder than the pusher in the plane direction of the base sheet. To be distributed.

  Therefore, in the thickness direction of the push button switch member, it is difficult for the pressing force applied to the pusher portion to be directly transmitted to the decorative layer located on the region where the pusher exists. Therefore, even if the key pressing operation is repeated for a long time, the destruction of the decorative layer is suppressed. In addition to this, in order to prevent the pressing force applied to the pusher part from being directly transmitted to the decorative layer, a shock absorbing layer is newly provided, or the minimum as a push button switch member is provided. By increasing the thickness of the adhesive layer, which is an indispensable layer for securing the function, it is not necessary to add a function as an impact absorbing layer to the adhesive layer. Therefore, the push button switch member of the present embodiment can be easily reduced in thickness.

  From the viewpoint of reducing the thickness, the push button switch member of the present embodiment is provided such that the non-operation surface of the key top and the decorative layer are in contact with each other, and the decorative layer and the adhesive layer are in contact with each other. Particularly preferably, the adhesive layer and the base sheet are provided in contact with each other, and the base sheet and the presser are provided in contact with each other. That is, a layer structure in which only a decorative layer, an adhesive layer, and a base sheet are provided between the key top and the presser, which is indispensable for ensuring a minimum function as a pushbutton switch member. Particularly preferred. By adopting such a layer configuration, it is very easy to make the push button switch member thinner.

  However, in the push button switch member of the present embodiment, one or more other layers can be provided between the key top and the pusher as long as the thickness of the push button switch member is not hindered. However, in this case, the total thickness of one or more other layers is in the range of more than 0 μm and 50 μm or less. If the total thickness exceeds 50 μm, it may be difficult to reduce the thickness of the push button switch member. Here, the “other layer provided between the key top and the presser” means any layer (or member) selected from the keytop, the decorative layer, the adhesive layer, the base sheet, and the presser. Means a layer having substantially no function. Examples of such a layer include an impact absorbing layer provided for the purpose of reducing the direct transmission of the pressing force applied to the presser to the decorative layer during a key pressing operation. Note that the key top, the decorative layer, the adhesive layer, the base sheet, and the presser may have other functions in addition to the functions that these layers and members should have.

  Further, from the viewpoint of reducing the thickness, the maximum thickness excluding the key top of the push button switch member of the present embodiment is preferably 500 μm or less, and more preferably 480 μm or less. On the other hand, the lower limit of the maximum thickness is not particularly limited, but is practically 350 μm or more.

  Next, specific examples of the push button switch member of the present embodiment will be described with reference to the drawings. FIG. 1 is a schematic cross-sectional view showing an example of a push button switch member of the present embodiment. A push button switch member 10A (10) shown in FIG. 1 has a key top 20A (20), a decorative layer 30, an adhesive layer 40A (40), a base sheet 50, and a pusher 60. A decorative layer 30, an adhesive layer 40A, a base sheet 50, and a pusher 60 are stacked in this order on the non-operation surface 22B of the key top 20A.

  In the example shown in FIG. 1, the non-operation surface 22B of the key top 20A and the decorative layer 30 are in contact with each other, the decorative layer 30 and the adhesive layer 40A are in contact with each other, and the adhesive layer 40A and the base sheet 50 are in contact with each other. Are in contact with each other, and the base sheet 50 and the pusher 60 are in contact with each other. However, one or more other layers may be provided between the key top 20A and the presser 60 as necessary, as long as the thickness of the push button switch member 10A is not hindered. If necessary, the operation surface 22T of the key top (the top surface portion 22TT and the side surface portion 22TS), the surface of the base sheet 50 on which the key top 20 is provided (the upper surface 50T), and the end surface 30S of the decoration layer 30. Other layers may be provided on the end surface 40S of the adhesive layer 40A and the surface (the lower surface 60B) opposite to the side on which the key top 20A of the pusher 60 is disposed, as necessary. For example, a protective layer made of a hard code agent or the like can be provided so as to cover the operation surface 22T, the upper surface 50T, the end surface 30S, and the end surface 40S.

  Further, in the pushbutton switch member 10A shown in FIG. 1, a plurality of key tops 20A (in the figure, two key tops are disposed on one base sheet 50 via an adhesive layer 40A and a decorative layer 30. 20A) is arranged. The pusher 60 is disposed in the vicinity of the center in the width direction (left-right direction and front-rear direction in the drawing) of the individual key tops 20A constituting the push-button switch member 10A. Furthermore, the decoration layer 30 and the adhesive layer 40A are provided so as to substantially correspond to the region on the non-operation surface 22B.

  The maximum thickness Tmax of the pushbutton switch member 10 means the shortest distance from the top surface portion 22TT to the lower surface 60B. However, when other layers are provided so as to cover the top surface portion 22TT and / or the lower surface 60B, the maximum thickness Tmax means a thickness including the film thicknesses of these other layers.

  FIG. 2 is a schematic cross-sectional view showing another example of the push button switch member of the present embodiment. A push button switch member 10B (10) shown in FIG. 2 has a structure in which a plurality of key tops 20A are integrated instead of the plurality of key tops 20A used in the push button switch member 10A shown in FIG. It is characterized in that the key top 20B (20) is used. Except this point, the structure of the push button switch member 10B shown in FIG. 2 is substantially the same as that of the push button switch member 10A shown in FIG.

  Here, the key top 20B shown in FIG. 2 has one continuous sheet-like member (sheet-like member 24) arranged substantially parallel to the base sheet 50, and the operation surface 22T side of the sheet-like member 24. A plurality of protrusions 26 (two protrusions 26 in the figure) corresponding to the individual keys are projected. Here, the individual convex portions 26 substantially correspond to the individual key tops 20A constituting the pushbutton switch member 10 shown in FIG. And the decoration layer 30 and the contact bonding layer 40A are arrange | positioned in the area | region corresponding to the convex part 26 among the non-operation surfaces 22B. Further, the pusher 60B is disposed in the vicinity of the center portion of the convex portion 26 in the width direction (the left-right direction and the front-rear direction in the drawing). Here, to cover the operation surface 22T, that is, the top surface portion 22TT and the side surface portion 22TS of the convex portion 26, and the surface 22TB of the sheet-like member 24 between the convex portion 26 and the convex portion 26, for example, Other layers such as a protective layer can be provided.

  FIG. 3 is a schematic cross-sectional view showing another example of the push button switch member of the present embodiment. The push button switch member 10C (10) shown in FIG. 3 is such that the adhesive layer 40B (40) is provided so as to cover the entire upper surface 50T of the base sheet 50 in the push button switch member 10A shown in FIG. There is a feature. Except for this point, the structure of the push button switch member 10C shown in FIG. 3 is substantially the same as that of the push button switch member 10A shown in FIG.

  Here, the operation surface 22T, the end surface 30S of the decorative layer 30, and the surface (upper surface 40T) opposite to the side on which the base sheet 50 of the adhesive layer 40B is provided (the upper surface 40T) are covered with the decorative layer 30 and the key top 20A. The exposed portion can be provided with other layers such as a protective layer as necessary.

  Note that the decorative layer 30, the adhesive layer 40, and the base sheet 50 shown in FIGS. 1 to 3 may each be composed of a single layer, or may be composed of two or more layers. Also good. Further, the key top 20B shown in FIG. 2 may be one in which the sheet-like member 24 and the convex portion 26 are integrally formed from the beginning, and the sheet constituting the sheet-like member 24 and the block constituting the convex portion 26. It may be produced by integrally molding the shaped member. The dimensional shape of the key top 20A or the convex portion 26 and the pusher 60 constituting each push button portion may be different for each push button portion, and may be the same in any push button portion.

  Next, each layer / member constituting the pushbutton switch member 10 of the present embodiment will be described in more detail.

-Key top-
The key top 20 has a shape that can be recognized as one key like the key top 20A exemplified in FIGS. 1 and 3, or a shape that can be recognized as a plurality of keys like the key top 20B exemplified in FIG. The shape and material of the sheet are not particularly limited as long as the sheet has a shape in which a plurality of convex portions corresponding to individual key portions are provided. However, as the key top 20, generally, a block-shaped resin having a cross-sectional shape of semicircular, semi-elliptical, trapezoid or the like is used, and the block-shaped resin is integrated with the base material, or A plurality of substrates may be provided on one side of the substrate by being fixed to the substrate by adhesion or the like.

  This key top may be produced by injection molding using a thermoplastic resin, or may be produced by photocuring an ultraviolet curable resin poured into a mold. The resin material constituting the key top is, for example, polycarbonate resin, acrylic resin, polyester resin, vinyl chloride resin, ABS resin (acrylonitrile / butadiene / styrene copolymer resin), PMMA resin, PBT resin, PA resin (polyamide). Resin).

  Further, when the push button switch member 10 of the present embodiment is an illuminated push button switch member, the key top 20 has light transmittance. Here, “light transmittance” means that the transmittance for light having a wavelength in the visible light region (about 400 to 800 nm) is in the range of 60% to 100% in the present specification, and 80% to 100%. % Is preferable. By setting the transmittance to 60% or more, sufficient visibility can be ensured when the pushbutton switch member 10 is illuminated from the non-operation surface 22B side by a backlight such as an LED in a dark place such as outdoors at night. .

-Decorative layer-
The decorative layer 30 is composed of a metal film, or is composed of an ink film that is mainly composed of a color material and a resin, and is formed using ink in which these components are dissolved in a solvent. Here, as the color material component, known pigments and dyes can be used, and besides these, a metallic flake, a glittering inorganic pigment obtained by coating the surface of flake glass with metal and / or metal oxide, and the like can also be used.

  Here, when the decoration layer 30 is an ink film, the content of the resin in the decoration layer 30 is preferably 80% by weight or less, and more preferably 50% by weight or less. When the content of the resin in the decorative layer 30 is 80% by weight or less, the flexibility of the decorative layer 30 is reduced. Therefore, if a strong external force continues to act repeatedly in the film thickness direction, the decorative layer 30 It becomes easy to be destroyed. As a result, the appearance of the push button switch member deteriorates. However, in the push button switch member 10 of the present embodiment, the pressing force applied to the pusher 60 in accordance with the key pressing operation is dispersed by the base sheet 50. For this reason, even if the content of the resin in the decorative layer 30 is 80% by weight or less and the flexibility of the decorative layer 30 is lowered, when the key is pressed, the film thickness direction is increased. Only works with weak external forces. Therefore, even if the key pressing operation is repeated over a long period of time, the decorative layer 30 is prevented from being destroyed, so that deterioration of the appearance of the pushbutton switch member 10 is suppressed.

  Here, as a representative example of the decorative layer 30 having a resin content of 80% by weight or less, printing formed using an ink (so-called mirror ink) containing a glitter pigment and a resin as main components. Layer. In addition, since the decoration layer 30 becomes easy to be destroyed when there is too little content of resin, it is preferable that the lower limit of content of resin is 20 weight% or more practically.

  The film thickness of the decorative layer 30 is not particularly limited, but in the case of a metal film, it is generally preferably in the range of 5 nm to 1000 nm, and in the case of an ink film, it is generally in the range of 2 μm to 50 μm. preferable. Further, the decorative layer 30 is not particularly limited as to whether or not the color tone caused by the decorative layer 30 can be visually recognized from the operation surface 22T side. However, the pushbutton switch member 10 of the present embodiment is not limited. However, when it is an illumination type pushbutton switch member, it has light transmittance. The method for forming the decorative layer 30 is not particularly limited. In the case of a metal film, for example, a known vapor deposition method such as a vacuum deposition method or a sputtering method, or a thermal transfer printing method can be used. In this case, for example, a known printing method such as offset printing, screen printing, or pad printing can be used.

-Adhesive layer-
The adhesive layer 40 is formed using at least one selected from a liquid adhesive, a paste-like adhesive, and a sheet-like adhesive member. Which adhesive or adhesive member is used for adhesion can be appropriately selected according to the shape of the pushbutton switch member 10. Here, the liquid adhesive can be applied using a dispenser. As the liquid adhesive, a moisture curable adhesive or an ultraviolet curable adhesive can be used.

  Moreover, as a paste-like adhesive agent, it can apply | coat using various printing methods. For this reason, it is easy to form the adhesive layer 40 in accordance with the shape of the non-operation surface 22B of the key top 20 with a paste-like adhesive. As the paste-like adhesive, an ultraviolet curing type or a type in which the adhesive is bonded by heating and pressing after drying the adhesive can be used. Note that in the case of performing adhesion by heating and pressing, the adhesive layer is improved because the layer containing the adhesive before drying contains a larger amount of solvent in the layer. Therefore, when bonding by heating and pressing, paste-like adhesive is applied to the bonding surface of one adherend and the bonding surface of the other adherend to be bonded together. Is preferred.

  Further, as the sheet-like adhesive member, for example, an adhesive member having a shape corresponding to the shape of the non-operation surface 22B of the key top 20 may be used, or an adhesive member connected to one corresponding to the shape of the non-operation surface 22B may be used. Alternatively, an adhesive member having a size substantially corresponding to the shape of the base sheet 50 may be used. The sheet-like adhesive member having adhesiveness from the beginning, such as a double-sided tape, can be used for forming the adhesive layer 40 as it is. The sheet-like pressure-sensitive adhesive member may be one that exhibits adhesiveness by ultraviolet irradiation treatment or heat and pressure treatment, and bonds one adherend to the other adherend. Here, examples of the sheet-like pressure-sensitive adhesive member that develops pressure-sensitive adhesiveness include a polyurethane sheet. In addition, when using the sheet-like adhesive member which has adhesiveness from the beginning, in order to suppress the bad influence of the click feeling at the time of pressing operation of a key, the shape of a sheet-like adhesive member is the non-operation surface 22B. It is preferable that it corresponds to the shape.

  The thickness of the adhesive layer 40 can be selected as appropriate. From the viewpoint of reducing the thickness of the pushbutton switch member 10, it is preferably thinner, preferably 90 μm or less, more preferably 40 μm or less, and further 20 μm or less. preferable. In addition, when the film thickness of the adhesive layer 40 is 40 μm or less, the action of relaxing and absorbing the impact during the key pressing operation by the adhesive layer 40 is weakened. However, in the pushbutton switch member 10 of the present embodiment, when the key pressing operation is repeated, the pressing force applied to the pusher 60 in contact with the switch element is caused by the base sheet 50 that is harder than the pusher 60. Are distributed in the plane direction. For this reason, even if the film thickness of the contact bonding layer 40 is 40 micrometers or less, destruction of the decorating layer 30 is suppressed. The lower limit value of the film thickness of the adhesive layer 40 is not particularly limited, but is practically preferably 5 μm or more.

  In addition, the adhesive layer 40 is preferably made of a flexible material from the viewpoint of absorbing an impact at the time of pressing the key. However, the adhesive layer 40 may be a cured product of an epoxy adhesive that forms a cross-linked structure. Thus, it may be made of a material lacking flexibility. Even when the adhesive layer 40 is made of such a material lacking in flexibility, the pressing force applied to the pusher 60 in contact with the switch element when the key pressing operation is repeated is harder than the pusher 60. This is because the base sheet 50 is dispersed in the plane direction of the base sheet 50. In addition, when the push button switch member 10 of the present embodiment is an illuminated push button switch member, the adhesive layer 40 is light transmissive.

-Base sheet and pusher-
As the base sheet 50, a sheet previously formed in a film shape can be used. Further, the pusher 60 can be attached to the surface of the base sheet 50 opposite to the side on which the key top 20 is disposed using an adhesive or the like. Alternatively, the base sheet 50 may be provided with a pusher 60 (convex portion) in advance on the surface of the base sheet 50 opposite to the side on which the key top 20 is disposed by integral molding.

  Further, if the hardness of the pusher 60 is smaller than the hardness of the base sheet 50, the material constituting the pusher 60 and the base sheet 50 can be appropriately selected from known resin materials and rubber materials. However, when the difference between the hardness of the pusher 60 and the hardness of the base sheet 50 is too small, the pressing force applied to the pusher 60 in contact with the switch element when the key pressing operation is repeated is The base sheet 50 harder than 60 may be difficult to be dispersed in the plane direction of the base sheet 50. Considering this point, the value obtained by subtracting the hardness of the presser 60 from the hardness of the base sheet 50 (hardness difference) is preferably D20 or more, and more preferably D30 or more. The upper limit of the hardness difference is not particularly limited, but is practically D80 or less. Here, the hardness is measured based on JIS K7215.

  Here, from the viewpoint of setting the hardness difference to be D20 or more, the combination of the material constituting the base sheet 50 and the material constituting the pusher 60 is a combination of polyethylene terephthalate resin and silicone resin, and polycarbonate resin and silicone. It is preferable to select from a combination with a resin.

  On the other hand, when the hardness of the pusher 60 is high, the impact on the switch element accompanying the key pressing operation is also increased. However, in the push button switch member of the present embodiment, the hardness of the pusher 60 is set low in relation to the base sheet 50. For this reason, even if the pressing operation of the key is repeated, the occurrence of breakage or failure due to the impact on the switch element can be suppressed.

  Although it does not specifically limit as thickness of the base sheet 50, From a viewpoint which disperse | distributes and absorbs the pressing force added to the presser 60 at the time of pressing operation of a key, and suppresses the damage to the decoration layer 30, it is 12 micrometers or more. It is preferable that it is 20 μm or more. Further, the upper limit value of the thickness of the base sheet 50 is preferably 100 μm or less and more preferably 75 μm or less from the viewpoint of reducing the thickness of the pushbutton switch member 10. From the viewpoint of pressing the switch, the thickness of the pusher 60 is preferably in the range of 150 μm to 500 μm. In addition, when the member 10 for pushbutton switches of this embodiment is an illumination type pushbutton switch member, the base sheet 50 needs to have a light transmittance, and the pusher 60 has a light transmittance. It is preferable.

-Manufacturing method of pushbutton switch member-
Although the manufacturing method of the member 10 for pushbutton switches of this embodiment is not specifically limited, Basically, the 1st to-be-adhered body which contains at least the keytop 20 and the decoration layer 30, a base sheet 50, and a pusher A manufacturing method having a process of bonding and adhering a second adherend including at least 60 is used. Below, the suitable manufacturing method of the member 10 for pushbutton switches of this embodiment is demonstrated using drawing.

  FIG. 4 is a schematic cross-sectional view showing an example of the manufacturing method of the push button switch member according to the first embodiment, and specifically shows an example of the manufacturing method of the push button switch member 10A shown in FIG. FIG. Here, FIG. 4A is a diagram illustrating an example of the first adherend 100A (100), and FIG. 4B is a diagram illustrating an example of the second adherend 110, FIG. 4C is a diagram illustrating a step of forming a stacked body.

  In producing the push button switch member 10A, first, the first adherend 100A and the second adherend 110 are prepared. Here, in order to produce the first adherend 100A, a decoration layer forming step of forming the decoration layer 30 on the non-operation surface 22B of the key top 20A, and the surface of the decoration layer 30 (decoration) A first adhesive layer forming step of forming an uncured first adhesive layer 120 by printing an adhesive on the side of the layer 30 opposite to the side on which the key top 20A is provided) Do at least. Thus, the first including the key top 20A, the decorative layer 30 formed on the non-operation surface 22B of the key top 20A, and the first adhesive layer 120 formed on the surface of the decorative layer 30. The adherend 100A is obtained. Here, the first adherend 100A shown in FIG. 4A includes only the key top 20A, the decorative layer 30, and the first adhesive layer 120.

  Further, in order to produce the second adherend 110, a pusher forming step of forming a pusher 60 having a hardness lower than that of the base sheet 50 by integral molding on one surface of the base sheet 50, and a pressing of the base sheet 50 A second adhesive layer 122 in an uncured state is formed by printing an adhesive on a surface opposite to the surface on which the child 60 is formed (on a surface corresponding to the upper surface 50 in FIG. 1). And at least an adhesive layer forming step. Accordingly, the base sheet 50, the pusher 60 formed on one side of the base sheet 50, and the second adhesive layer formed on the surface of the base sheet 50 opposite to the surface on which the pusher 60 is formed. And a second adherend including 122 is obtained. The second adhesive layer 122 can also be provided so as to cover the entire surface of one side of the base sheet 50, but normally, in the region where the key top 20A is to be arranged, that is, in the plane direction of the base sheet 50. It is preferable that the pusher 60 is provided only in a region located substantially at the center. Here, the second adherend 110 shown in FIG. 4B includes only the base sheet 50, the pusher 60, and the second adhesive layer 122. The second adhesive layer 122 includes the key top 20A. It is provided only in the area to be arranged.

  Subsequently, as shown in FIG. 4C, the first adherend 100 </ b> A and the second adherend 110 are bonded to the surface of the first adherend 110 on which the first adhesive layer 120 is provided. And the surface of the second adherend 110 on which the second adhesive layer 122 is provided are bonded together. Thereby, the first adherend 100A, the first adhesive layer 120, the second adhesive layer 122, and the second adherend 110 are laminated in this order (in FIG. 4, (Not shown). And the heating-pressing process which heat-presses this laminated body is implemented. Thereby, the first adhesive layer 120 and the second adhesive layer 122 in the laminate are cured to form the adhesive layer 40A, and the push button switch member 10A is completed. In addition, although the implementation conditions of a heating-pressing process are suitably selected according to the kind of adhesive agent to be used, generally, the temperature is in the range of about 80 ° C. to 170 ° C., and the pressure is about 0.1 MPa to 10 MPa. It can be carried out within the range.

  Further, when the pushbutton switch member 10B shown in FIG. 2 is manufactured by using the method for manufacturing the pushbutton switch member of the first embodiment illustrated in FIG. 4, the first embodiment shown in FIG. Instead of one adherend 100A, a first adherend 100B (100) illustrated in FIG. 5 can be used. Here, the first adherend 100B shown in FIG. 5 is arranged on the non-operation surface 22B corresponding to the area where the individual tops 26 are provided in the key top 20B and the planar direction of the key top 20B. The decorative layer 30 provided and the first adhesive layer 120 provided on the surface of the decorative layer 30 (the surface opposite to the side on which the key top 20B of the decorative layer 30 is provided) are provided. Is.

  In addition, in the member 10 for pushbutton switches of 1st this embodiment, the base sheet 50 whose hardness is larger than the pusher 60 is used. That is, the base sheet 50 tends to use a harder material in terms of hardness as compared with a base sheet used for a conventional push button switch member. For this reason, in the case where the adhesive layer is provided only on one adherend among the pair of adherends used when the pushbutton switch member 10 is manufactured, the base sheet 50 tends to lack flexibility. At the bonding interface of the adherend, an unbonded region is likely to occur. However, in the method for manufacturing the member for a push button switch according to the first embodiment, the first adhesive layer 120 is provided on the first adherend 100 and the second adherend 110 is provided with the second adhesive layer 120. The adhesive layer 122 is provided. For this reason, when the 1st to-be-adhered body 100 and the 2nd to-be-adhered body 110 are adhere | attached, generation | occurrence | production of the non-bonding area | region in a joining interface can be suppressed easily.

  Next, the manufacturing method of the member for pushbutton switches of 2nd this embodiment and the manufacturing method of the member for pushbutton switches of 2nd this embodiment are demonstrated. FIG. 6 is a schematic cross-sectional view showing an example of a method for manufacturing a member for a push button switch of the second embodiment and a method for manufacturing a member for a push button switch of the second embodiment. Specifically, FIG. It is a figure explaining the manufacturing method of the member 10B for pushbutton switches shown. Here, FIG. 6A is a diagram illustrating an example of the first adherend 102, and FIG. 6B is a diagram illustrating an example of the second adherend 112, and FIG. (C) is a figure explaining the process of forming a laminated body.

  In producing the push button switch member 10B, first, the first adherend 102 and the second adherend 112 are prepared. Here, in order to produce the 1st to-be-adhered body 102, the decoration layer formation process which forms the decoration layer 30 on the non-operation surface 22B of 20 A of key tops is implemented at least. Thereby, the 1st to-be-adhered body 102 containing 20 A of key tops and the decoration layer 30 formed on the non-operation surface 22B of 20 A of key tops is obtained. Here, the 1st to-be-adhered body 102 shown to FIG. 6 (A) is comprised only from the keytop 20A and the decoration layer 30. FIG.

  Further, in order to produce the second adherend 112, at least a pusher forming step of forming a pusher 60 having a hardness lower than that of the base sheet 50 by integral molding on one surface of the base sheet 50 is performed. Thereby, the 2nd to-be-adhered body 112 containing the base sheet 50 and the pusher 60 formed in the single side | surface of the base sheet 50 is obtained. Here, the second adherend 112 shown in FIG. 6B is composed of only the base sheet 50 and the pusher 60.

  Subsequently, as shown in FIG. 6C, the surface of the first adherend 102 provided with the decorative layer 30 and the surface of the second adherend 112 opposite to the surface provided with the pusher 60 are provided. A bonding step of bonding the first adherend 102 and the second adherend 112 is performed with the sheet-like adhesive member 130 interposed between the first adherend and the second adherend. Thereby, the laminated body (not shown in the figure) in which the first adherend 102, the sheet-like adhesive member 130, and the second adherend 112 are laminated in this order is obtained. At the time of bonding, the first adherend 102 is an area where the key top 20A of the base sheet 50 is to be arranged, that is, an area where the pusher 60 is located at the approximate center in the plane direction of the base sheet 50. Bonding is performed with the position aligned above.

  Here, in the manufacturing method of the member for pushbutton switches of 2nd this embodiment, the sheet-like adhesive member 130 which expresses adhesiveness by heating and pressurization is used as the sheet-like adhesive member 130. Therefore, after producing a laminated body, the heating-pressing process which heat-presses this laminated body is implemented. Thus, the push button switch member 10C shown in FIG. 3 is completed. Here, the sheet-like adhesive member 130 that has been subjected to the heat and pressure treatment corresponds to the adhesive layer 40 that constitutes the pushbutton switch member 10C. In addition, although the implementation conditions of a heating-pressing process are suitably selected according to the kind of sheet-like adhesive member which expresses adhesiveness by heating-pressing, generally temperature is the range of about 80 to 170 degreeC. In particular, the pressure can be within a range of about 0.1 MPa to 10 MPa.

  Moreover, in the manufacturing method of the member for pushbutton switches of 3rd this embodiment, the sheet-like adhesive member which has adhesiveness is used as the sheet-like adhesive member 130 (from the beginning). Therefore, the obtained laminated body becomes the member 10C for pushbutton switches shown in FIG. Here, the sheet-like adhesive member 130 corresponds to the adhesive layer 40 constituting the pushbutton switch member 10C.

  In the example shown in FIG. 6, a sheet having a size substantially corresponding to the shape of the base sheet 50 is used as the sheet-like adhesive member 130, but a size corresponding to the shape of the non-operation surface 22B of the key top 20A. These sheets can also be used. In this case, the pushbutton switch member 10A shown in FIG. 2 can be obtained.

-Key panels, electronic devices-
The key panel of this embodiment includes at least the push button switch member 10 of this embodiment. Here, in the present specification, the “key panel” refers to an operation panel having an operation switch. The key panel may be provided integrally with the electronic device main body to be operated by the switch operation, or physically separated from the electronic device main body to be operated by the switch operation. There may be. In the latter case, the key panel and the electronic device may be a wired type, or the key panel and the electronic device may be a wireless type capable of exchanging signals by infrared communication or the like. Good. Typical examples include operation panels used for air conditioners, intercoms, remote controllers such as televisions, keyboards for desktop personal computers, and the like. In addition, as an electronic device having a key panel (an electronic device in which the key panel is integrated with the electronic device main body), an electronic dictionary, a mobile phone, a calculator, a notebook type personal computer, a personal digital assistance (PDA), an MP3 player, etc. And a portable player having a music playback function.

  When the push button switch member 10 of the present embodiment is an illuminated key panel, a light source is further provided on the back surface (the surface on which the pusher 60 is provided) or the side surface of the push button switch member 10. It is done. Here, the “light source” means a light source that emits light. When the light source is arranged on the side surface side of the push button switch member 10, a member that guides light emitted from the light source to the back side, such as a light guide plate, is provided on the back surface side of the push button switch member 10. It arrange | positions substantially parallel to the member 10 for an object, and arrange | positions a light source on the side surface side of this member. Here, as a light source that emits light, an LED, an electroluminescence sheet (EL sheet), or the like can be used.

  The use of the electronic device of the present embodiment is not particularly limited as long as it has the above-described key panel integrally with the main body of the electronic device; however, it is a portable electronic device; for example, a mobile phone, an electronic dictionary, a PDA, a notebook It is preferably a personal computer of the type, and most preferably a mobile phone. FIG. 7 is an external view showing an example of an electronic apparatus according to the present embodiment, specifically a diagram showing a mobile phone. A cellular phone 200 shown in FIG. 7 includes a display portion 202 and a main body portion 204 having a key panel provided with the pushbutton switch member 10 of the present embodiment.

  EXAMPLES The present invention will be described below with reference to examples, but the present invention is not limited to the following examples.

Example 1
A pushbutton switch member 10A having the layer structure shown in FIG. 1 was produced by the following procedure. First, a non-operating surface 22B of a 500 μm thick polycarbonate resin key top 20A is screen-printed with silver ink (Seiko Advance, CAV Meiban) to form a decorative layer 30 with a film thickness of 8 μm. did. Then, the 1st adhesive bond layer 120 with a film thickness of 5 micrometers was formed in the surface of this decorating layer 30 using the paste-form urethane type resin adhesive (Seiko Advance company make, SG740). Thus, a first adherend 100A was obtained. In addition, content of the resin component in the decoration layer 30 was 60 weight%.

  Also, a presser 60 (material: urethane-modified acrylic resin, thickness: 300 μm, hardness: D65) is integrally formed on one side of a base sheet 50 (double-side surface-treated polyethylene terephthalate resin sheet, thickness: 50 μm, hardness: D70). Formed. Next, the surface of the base sheet 50 opposite to the side on which the pusher 60 is provided is screen-printed with a paste-like urethane resin adhesive (SG740, manufactured by Seiko Advance Co., Ltd.), and the film thickness is 5 μm. The second adhesive layer 122 was formed. Note that the second adhesive layer 122 was provided only in a region where the key top 20A is to be arranged, that is, only in a region where the pusher 60 is located substantially in the plane direction of the base sheet 50. As a result, a second adherend 110 was obtained.

  Next, after the first adherend 100A and the second adherend 110 are bonded together to produce a laminate, the laminate is heated for 15 seconds at a temperature of 150 ° C. and a pressure of 0.4 MPa. Pressurized. Thus, a push button switch member 10A was obtained. The obtained push button switch member 10A had a maximum thickness of 868 μm, and the adhesive layer 40A had a thickness of 10 μm.

(Example 2)
A pushbutton switch member 10A was produced in the same manner as in Example 1 except that the material of the pusher 60 was changed to silicone rubber (hardness: D25).

(Example 3)
A pushbutton switch member 10A was produced in the same manner as in Example 1 except that the ink used for forming the decorative layer 30 was changed to a transparent silver ink (Seiko Advance, CAV Meban).

Example 4
A pushbutton switch member 10A was produced in the same manner as in Example 1 except that the thickness of the first adhesive layer 120 and the second adhesive layer 122 was changed to change the thickness of the adhesive layer 40A to 85 μm. .

(Example 5)
The pushbutton switch member 10B shown in FIG. 2 was produced according to the following procedure. First, on the non-operation surface 22B of the key top 20B made of urethane-modified acrylic resin having a thickness of 300 μm, a screen is formed using silver ink (Seiko Advance Co., Ltd., CAV Meban) only in an area corresponding to the convex portion 26. Printing was performed to form a decorative layer 30 having a thickness of 8 μm. Then, the 1st adhesive bond layer 120 with a film thickness of 5 micrometers was formed in the surface of this decorating layer 30 using the paste-form urethane type resin adhesive (Seiko Advance company make, SG740). Thus, a first adherend 100A was obtained. In addition, content of the resin component in the decoration layer 30 was 60 weight%.

  Also, a presser 60 (material: silicone resin, thickness: 300 μm, hardness: D25) was formed on one side of a base sheet 50 (polyethylene terephthalate resin sheet, thickness: 50 μm, hardness: D70) by integral molding. Next, the surface of the base sheet 50 opposite to the side on which the pusher 60 is provided is screen-printed with a paste-like urethane resin adhesive (SG740, manufactured by Seiko Advance Co., Ltd.), and the film thickness is 5 μm. The second adhesive layer 122 was formed. Note that the second adhesive layer 122 was provided only in a region where the key top 20A is to be arranged, that is, only in a region where the pusher 60 is located substantially in the plane direction of the base sheet 50. As a result, a second adherend 110 was obtained.

  Next, the first adherend 100B and the second adherend 110 are bonded together to produce a laminate, and then the laminate is heated for 15 seconds at a temperature of 150 ° C. and a pressure of 0.4 MPa. Pressurized. Thus, a push button switch member 10B was obtained. The obtained push button switch member 10B had a maximum thickness of 943 μm, and the adhesive layer 40A had a thickness of 10 μm.

(Example 6)
A push button switch member 10C shown in FIG. 3 was produced by the following procedure. First, the non-operation surface 22B of the key top 20A made of urethane-modified acrylic resin having a thickness of 300 μm is screen-printed using silver ink (Seiko Advance, CAV Meban), and the decorative layer 30 having a thickness of 8 μm. Formed. As a result, a first adherend 102 was obtained. In addition, content of the resin component in the decoration layer 30 was 60 weight%.

  Also, a presser 60 (material: silicone rubber, thickness: 300 μm, hardness: D25) was formed on one side of a base sheet 50 (polyethylene terephthalate resin sheet, thickness: 50 μm, hardness: D70) by integral molding. As a result, a second adherend 112 was obtained.

  Next, the first adherend 102 and the second adherend 112 are passed through a sheet-like adhesive member 130 (double-sided tape, Sony Chemical & Information Device, G9951W-30, thickness: 30 μm). Thus, a push button switch member 10C was obtained. The obtained push button switch member 10C had a maximum thickness of 688 μm, and the adhesive layer 40B had a thickness of 30 μm.

(Comparative Example 1)
10 A of pushbutton switch members were produced like Example 1 except having changed the material of the base sheet 50 into the polyurethane resin (hardness: D40).

(Reference Example 1)
10 A of pushbutton switch members were produced like the comparative example 1 except having changed the thickness of the base sheet 50 into 200 micrometers.

<Evaluation>
After assembling the key panel using the samples of each example and comparative example, the presser 60 was repeatedly pressed against the switch element by pressing the key continuously 100,000 times with a constant pressing force. Then, the sample after the keystroke test is observed from the operation surface 22T side, and the degree of destruction of the decorative layer 30 near the pusher 60 is evaluated by visual observation and an optical microscope (magnification: 50 times). did. The results are shown in Table 1.

In addition, the evaluation criteria of the appearance evaluation after the 100,000 keystroke test shown in Table 1 are as follows.
A: Almost no destruction of the decorative layer 30 can be confirmed even by observation with an optical microscope.
B: When observing with an optical microscope, destruction of the decoration layer 30 is confirmed a little. However, visual observation cannot confirm the destruction of the decoration layer 30 at all.
C: When visually observed, although some destruction of the decorative layer 30 is confirmed, it does not cause deterioration of the appearance aesthetics.
D: When visually observed, destruction of the decorative layer 30 is confirmed, and the appearance aesthetics are also clearly deteriorated.
E: When visually observed, significant destruction of the decorative layer 30 is confirmed.

  In Table 1, “PET” means polyethylene terephthalate, and “PU” means polyurethane. The thickness of the adhesive layer means not the total thickness at the manufacturing stage of the push button switch member but the total thickness in a state completed as a push button switch member.

10, 10A, 10B, 10C Pushbutton switch member 20, 20A, 20B Key top 22T Operation surface 22TT Top surface portion 22TS Side surface portion 22TB Surface 22B (sheet-like member 24) Non-operation surface 24 Sheet-like member 26 Protruding portion 30 Decoration layer 30S End surface 40, 40A, 40B Adhesive layer 40S End surface 50 Base sheet 50T Upper surface 60 Pusher 60B Lower surface 100, 100A, 100B First adherend 102 First adherend 110 Second adherend 112 First Second adherend 120 First adhesive layer 122 Second adhesive layer 130 Sheet-like adhesive member 200 Mobile phone 202 Display portion 204 Main body portion

Claims (14)

Have a key top,
On the non-operation surface of the key top, a decorative layer, an adhesive layer, a base sheet, and a presser are laminated in this order,
A push button switch member, wherein the pusher has a hardness smaller than that of the base sheet. In the member for pushbutton switches according to claim 1,
The non-operation surface of the key top and the decorative layer are provided in contact with each other, the decorative layer and the adhesive layer are provided in contact with each other, and the adhesive layer and the base sheet are provided in contact with each other. And a member for a push button switch, wherein the base sheet and the pusher are provided in contact with each other. In the member for pushbutton switches according to claim 1,
One or more other layers are provided between the key top and the presser, and the total thickness of the one or more other layers is more than 0 μm and 50 μm or less. Switch member. In the member for pushbutton switches as described in any one of Claims 1-3,
A member for a push button switch, wherein the maximum thickness excluding the key top of the member for a push button switch is 500 μm or less. In the member for pushbutton switches as described in any one of Claims 1-4,
A member for a pushbutton switch, wherein the decorative layer contains a resin, and the content of the resin in the decorative layer is 80% by weight or less. In the member for pushbutton switches as described in any one of Claims 1-5,
A member for a push button switch, wherein the adhesive layer has a thickness of 90 μm or less. In the member for pushbutton switches as described in any one of Claims 1-6,
A member for a push button switch, wherein a value obtained by subtracting the hardness of the pusher from the hardness of the base sheet is D20 or more. In the member for pushbutton switches according to claim 7,
The combination of the material constituting the base sheet and the material constituting the pusher is selected from a combination of polyethylene terephthalate resin and silicone resin, and a combination of polycarbonate resin and silicone resin. A member for a push button switch.   A key panel comprising the pushbutton switch member according to any one of claims 1 to 8.   An electronic apparatus comprising the pushbutton switch member according to any one of claims 1 to 8. The electronic device according to claim 10,
An electronic device, wherein the electronic device is a mobile phone. (1) A decorative layer forming step for forming a decorative layer on the non-operation surface of the key top, and an adhesive is printed on the surface of the decorative layer to form an uncured first adhesive layer. By undergoing at least the first adhesive layer forming step,
A first adherend including the key top, the decorative layer formed on the non-operation surface of the key top, and a first adhesive layer formed on the surface of the decorative layer. Make
(2) A presser forming step of forming a presser having a lower hardness than the base sheet by integral molding on one side of the base sheet, and a surface of the base sheet opposite to the surface on which the presser is formed. By at least going through a second adhesive layer forming step of printing an adhesive to form an uncured second adhesive layer,
The base sheet, the pusher formed on one side of the base sheet, and a second adhesive layer formed on the surface of the base sheet opposite to the side on which the pusher is formed. Make a second adherend,
(3) Furthermore, the first adherend and the second adherend are combined with the surface of the first adherend on which the first adhesive layer is provided, and the second adherend. A heating and pressurizing step for heating and pressurizing the laminate obtained by bonding the surface of the bonded body provided with the second adhesive layer;
A method for producing a member for a push button switch, comprising producing the member for a push button switch through at least the above. (1) By passing through at least a decorative layer forming step of forming a decorative layer on the non-operation surface of the key top,
Producing a first adherend including the key top and the decorative layer formed on the non-operation surface of the key top;
(2) By at least a pusher forming step of forming a pusher having a hardness lower than that of the base sheet by integral molding on one side of the base sheet,
Producing a second adherend comprising the base sheet and a presser formed on one side of the base sheet;
(3) Furthermore, between the surface on which the decorative layer of the first adherend is provided and the surface opposite to the surface on which the pusher of the second adherend is provided, A laminated body obtained by bonding the first adherend and the second adherend is heated and pressurized with a sheet-like adhesive member that exhibits adhesiveness by heat and pressure interposed. A heating and pressing step;
A method for producing a member for a push button switch, comprising producing the member for a push button switch through at least the above. (1) By passing through at least a decorative layer forming step of forming a decorative layer on the non-operation surface of the key top,
Producing a first adherend including the key top and the decorative layer formed on the non-operation surface of the key top;
(2) By at least a pusher forming step of forming a pusher having a hardness lower than that of the base sheet by integral molding on one side of the base sheet,
Producing a second adherend comprising the base sheet and a presser formed on one side of the base sheet;
(3) Furthermore, between the surface on which the decorative layer of the first adherend is provided and the surface opposite to the surface on which the pusher of the second adherend is provided, In a state where an adhesive sheet-like adhesive member is interposed, a laminating step of laminating the first adherend and the second adherend,
A method for producing a member for a push button switch, comprising producing the member for a push button switch through at least the above.

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