JP2017098175A - Switch member for push button and manufacturing method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a switch member for a push button capable of fixing an operation key and a dome-shaped contact without using an adhesive and reducing positional deviation between them and realizing efficient illumination.SOLUTION: The switch member for a push button comprises: a perforated dome-shaped contact 17 having a through hole 17a; an operation key 13 disposed opposite to the projecting side of the perforated dome-shaped contact 17; a pressing part 15 fixed to either the side of the perforated dome-shaped contact 17 or the side of the operating key 13; and illuminating means 18 inside the perforated dome-shaped contact 17 and capable of illuminating the side of the operation key 13 through the through hole 17a. On the surface including at least a part of the pressing part 15 and the surface on the side of the operation key 13 contacting a part of the pressing part 15, the switch member includes a first elastic layer 14 having a siloxane bond. On the other surface in contact with the first elastic layer 14, the switch member includes a second elastic layer having a siloxane bond or a silane coupling agent layer 21, and directly bonds the first elastic layer and the second elastic layer or the first elastic layer 14 and the silane coupling agent layer 21.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a push button switch member and a method of manufacturing the same.

  Conventionally, pressing an operation key from above the top of a dome-shaped contact represented by a metal dome, and pressing the switch connected to the operation key against the dome-shaped contact to turn on the switch Switch members are used in various electronic devices. In such a switch member for a push button, generally, the pressing portion and the dome-shaped contact are independently opposed to each other, and the pressing portion buckles and deforms the dome-shaped contact through the pressing of the operation key to turn on the switch. The structure When an illuminating means such as an LED is arranged below the operation key, the illuminating means is usually arranged around the dome-shaped contact. A more specific configuration will be described below with reference to the drawings.

  FIG. 10 shows a plan view (10A) and an XX sectional view (10B) of an electronic device provided with a conventionally known push button switch member, respectively.

  The electronic device 40 shown in FIG. 10 (10 </ b> A) includes a display unit 52 (which may also serve as an operation surface) and a pushbutton switch member 50 including three operation keys 53 on the front surface of the casing 51. . As shown in FIG. 10 (10 </ b> B), the push button switch member 50 provided in the electronic device 40 has a configuration in which the upper part of the operation key 53 protrudes from the hole for the operation key 53 formed in the housing 51. . The operation key 53 has an elastic sheet 54 disposed on the lower surface thereof. The elastic sheet 54 includes one pressing portion 55 that protrudes downward at a position corresponding to a position directly below each operation key 53 on the lower surface thereof. On the other hand, the substrate 56 includes one dome-shaped contact 57 formed by forming a metal thin plate into a dome shape immediately below each pressing portion 55. The opening-side end surface of the dome-shaped contact 57 is electrically connected to an electrode embedded in the substrate 56 with its surface exposed from the substrate 56. Two LEDs 58 as illumination means are provided on the substrate 56 and are arranged around the dome-shaped contact 57. The top surface opposite to the opening side of the dome-shaped contact 57 is not fixed to the pressing portion 55, and the dome-shaped contact 57 is buckled and deformed by the pressing portion 55 when the operation key 53 is pressed. The electrode disposed inside the contact 57 and the dome contact 57 can be made conductive.

  On the other hand, unlike the push button switch member shown in FIG. 10, there is also known a push button switch member in which a pressing portion located below an operation key and a dome-shaped contact on a substrate are fixed with an adhesive (for example, (See Patent Documents 1 and 2). By integrating the operation key and the top of the dome-shaped contact via an adhesive, when the operation key is pressed, pressure is reliably applied to the top of the dome-shaped contact, and the dome-shaped contact is accurately buckled and deformed. Can be made.

JP 2001-1265887 A JP 2005-129543 A

  However, the above-described push button switch member that is conventionally known is required to have further characteristics. Ideally, the pressing portion located immediately below the operation key is in contact with the top surface of the dome-shaped contact. However, when the pressing portion of the operation key and the dome-shaped contact are not fixed, the pressing portion does not necessarily contact the top surface due to the molding accuracy of each member or the assembly accuracy of each member. . Further, depending on the shape of the pressing portion, it may be difficult to center the dome-shaped contact. Further, even when the above-described accuracy is good, when the operation key is pressed, there is a possibility that the pressing portion is displaced laterally from the top surface of the dome-shaped contact. As disclosed in Patent Documents 1 and 2, when the pressing portion of the operation key and the dome-shaped contact are fixed with an adhesive interposed therebetween, the above problems can be reduced.

  By the way, as electronic devices become increasingly smaller or thinner, the space for arranging LEDs 58 (an example of illumination means) shown in FIG. Further, in order to increase the light emission luminance of the operation key, it is preferable to dispose the LED in a position immediately below the operation key, that is, in an internal space surrounded by a dome-shaped contact. For this reason, it is desirable to provide a through hole at the top of the dome-shaped contact.

  However, if a through hole is provided at the top of the dome-shaped contact, the pressing portion cannot be formed at the top of the dome-shaped contact. Therefore, the present inventor previously considered a structure that is advantageous in that the pressing portion is arranged on the outer periphery of the through-hole so that the pressing by a low stroke and the push button switch member are made thin. An attempt was made to fix the pressing part to the outer periphery of the through-hole formed at the top of the dome-shaped contact with an adhesive, but the adhesive easily enters the periphery of the through-hole and further downward from the through-hole, which hinders illumination. The phenomenon that occurs was observed. In addition, there is a possibility that variations in the thickness direction of the push button switch member may occur due to differences in operability depending on the amount of adhesive applied, and variations in adhesive force or adhesive thickness.

  The present invention has been made in view of the above problems, and without using an adhesive, the operation key and the dome-shaped contact are fixed to reduce their misalignment, so that pressing with a low stroke and thinning are achieved. It is an object of the present invention to provide a push button switch member that is advantageous in that it can realize efficient illumination.

  A pushbutton switch member according to an embodiment for achieving the above object includes a perforated dome-shaped contact having a through-hole penetrating the projecting top and an operation arranged to face the projecting side of the perforated dome-shaped contact. A key, a pressing portion disposed between the perforated dome-shaped contact and the operation key and fixed to either the perforated dome-shaped contact side or the operation key side; and an interior covered with the perforated dome-shaped contact A push button comprising an illuminating means that can illuminate the operation key side through the through-hole, and pressing the operation key toward the perforated dome-shaped contact so that the perforated dome-shaped contact can be elastically buckled and deformed. The pressing member is disposed so as to connect between the perforated dome-shaped contact and the operation key in the outer periphery of the through hole of the perforated dome-shaped contact, and includes at least a part of the pressing portion. Operation key side in contact with part of surface and pressing part Alternatively, a first elastic layer having a siloxane bond is provided on one surface of the perforated dome-shaped contact side, while a second elasticity having a siloxane bond is provided on the other surface in contact with the first elastic layer. It comprises a body layer or a silane coupling agent layer, and is formed by directly joining the first elastic layer and the second elastic layer, or the first elastic layer and the silane coupling agent layer.

  The switch member for a push button according to another embodiment is further configured by fixing the pressing portion to the operation key side, and on the surface including at least the top of the pressing portion on the surface of the operation key with the perforated dome-shaped contact. One elastic layer may be provided.

  The switch member for a push button according to another embodiment is formed by fixing the pressing portion to the operation key side, and on the surface including at least the top portion of the pressing portion on the surface on the perforated dome-shaped contact side of the operation key, A bielastic layer or a silane coupling agent layer may be provided.

  The switch member for a push button according to another embodiment is formed by fixing the pressing portion to the perforated dome-shaped contact side, and includes at least the top portion of the pressing portion on the operation key side surface of the perforated dome-shaped contact. In addition, a first elastic layer may be provided.

  The switch member for a push button according to another embodiment is formed by fixing the pressing portion to the perforated dome-shaped contact side, and includes at least the top portion of the pressing portion on the operation key side surface of the perforated dome-shaped contact. In addition, a second elastic layer or a silane coupling agent layer may be provided.

  The switch member for a push button according to another embodiment is also provided with an opening in a part of the outer wall with the direction connecting the operation key and the perforated dome-shaped contact at the pressing portion, and is emitted from the illumination means. The emitted light may be emitted from the opening.

  The push button switch member according to another embodiment further includes a first elastic layer and a second elastic layer between the operation key and the perforated dome-shaped contact, and at least the first elastic layer or You may form a light-shielding part in the side wall of the press part currently formed in the 2nd elastic body layer.

  In the push button switch member according to another embodiment, at least one of the first elastic layer and the second elastic layer may be made of silicone rubber.

  Further, the manufacturing method of the push button switch member according to one embodiment includes a perforated dome-shaped contact having a through-hole penetrating the projecting top portion, and an operation key disposed opposite to the projecting side of the perforated dome-shaped contact. A pressing portion that is disposed between the perforated dome-shaped contact and the operation key and is fixed to either the perforated dome-shaped contact side or the operation key side; A switch for a push button comprising an illuminating means capable of illuminating the operation key side through the through hole, and pressing the operation key in the direction of the perforated dome-shaped contact so that the perforated dome-shaped contact can be elastically buckled and deformed A method of manufacturing a member, wherein the pressing portion is disposed so as to connect between the perforated dome-shaped contact and the operation key at the outer periphery of the through-hole of the perforated dome-shaped contact, and at least a part of the pressing portion. That touches part of the surface and the pressing part including The first elastic layer having a siloxane bond is provided on one surface of the negative side or the perforated dome-shaped contact side, while the second surface having a siloxane bond is provided on the other surface in contact with the first elastic layer. An elastic body layer or a silane coupling agent layer is provided, and ultraviolet light is irradiated to the opposing surfaces of both the first elastic layer and the second elastic layer or the silane coupling agent layer. It includes an adhesive active layer forming step of forming an adhesive active layer having higher adhesiveness than before irradiation with ultraviolet rays, and a bonding step of directly bonding the adhesive active layers together.

  According to the present invention, without using an adhesive, the operation key and the dome-shaped contact are fixed to reduce their positional deviation, which is advantageous for low stroke pressing and thinning and efficient illumination. Can be provided.

FIG. 1 is a cross-sectional view of the push button switch member according to the first embodiment, taken along the line XX in FIG. 2 is a rear view of the elastic sheet constituting the push button switch member of FIG. 1, a perforated dome-like contact constituting the push button switch member, and a plan view (2A) of the periphery thereof, and a region A in FIG. An enlarged sectional view (2B) is shown respectively. FIG. 3 shows a cross-sectional view of the push button switch member according to the second embodiment, taken along the line XX in FIG. 4 is a rear view of the elastic sheet constituting the push button switch member of FIG. 3, a perforated dome-shaped contact constituting the push button switch member, and a plan view (4A) of the periphery thereof, and a region C in FIG. An enlarged sectional view (4B) is shown respectively. FIG. 5 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the third embodiment. ) And an enlarged sectional view (5B) similar to FIG. 2 (2B), respectively. FIG. 6 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the fourth embodiment (6A). ) And an enlarged cross-sectional view (6B) similar to FIG. 2 (2B), respectively. FIG. 7 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the fifth embodiment. ) And an enlarged sectional view (7B) similar to FIG. 2 (2B), respectively. FIG. 8 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the sixth embodiment (8A). ) And an enlarged sectional view (8B) similar to FIG. 2 (2B). FIG. 9 shows the flow of the main steps in a preferred embodiment of the manufacturing method of the push button switch member of the present invention. FIG. 10 shows a plan view (10A) and an XX sectional view (10B) of an electronic device provided with a conventionally known push button switch member, respectively.

  Next, each embodiment of the push button switch member and the manufacturing method thereof according to the present invention will be described with reference to the drawings. Each embodiment described below does not limit the invention according to the scope of claims, and all the elements and combinations thereof described in each embodiment are included in the present invention. It is not always essential to the solution.

1. Configuration of push button switch member (first embodiment)
FIG. 1 is a cross-sectional view of the push button switch member according to the first embodiment, taken along the line XX in FIG. 2 is a rear view of the elastic sheet constituting the push button switch member of FIG. 1, a perforated dome-like contact constituting the push button switch member, and a plan view (2A) of the periphery thereof, and a region A in FIG. An enlarged sectional view (2B) is shown respectively. In FIG. 2 (2A), the shaded area of the portion drawn with a thick line in the elastic sheet is a surface where the cylindrical pressing portion protruding in the surface direction of the paper is in contact with the perforated dome-shaped contact. The shaded area B of the portion drawn with a one-dot chain line in the hole dome-shaped contact is a surface in contact with the pressing portion.

  The pushbutton switch member 1 according to the first embodiment includes three operation keys 13 arranged with the top surface exposed from a through hole formed in a casing 11 of an electronic device, and three operations. An elastic sheet 14 commonly provided on the back side of the key 13, a substrate 16 disposed inward of the elastic sheet 14, and a hole disposed on one side of the substrate 16 on the side facing the elastic sheet 14. The dome-shaped contact 17 is an example of an illuminating means that is inside the perforated dome-shaped contact 17 and that can illuminate the operation key 13 through a through-hole 17 a that opens the top of the perforated dome-shaped contact 17. LED18. For example, EL (electroluminescence), a fluorescent lamp, an incandescent lamp, or the like may be used as the illumination means other than the LED 18.

  The operation key 13 is a substantially hat-shaped key including a flange portion having a size that does not come out of the through hole of the housing 11. However, the flange portion is not an essential configuration. This point is the same in other embodiments. The material constituting the operation key 13 may be any kind of resin including a thermoplastic resin, a thermosetting resin, a photocurable resin, an electron beam curable resin, and the like. Moreover, you may comprise the operation key 13 using glass, a metal, ceramics, a graphite, etc. as constituent materials other than resin.

  The elastic sheet 14 is fixed to the housing 11 and can be bent so as to protrude inward when the operation key 13 is pressed inwardly (that is, in the direction of the perforated dome-shaped contact 17). It is a sheet. In this embodiment, the elastic sheet 14 is a sheet suitably composed of an elastic body having a siloxane bond, for example, silicone rubber. The elastic sheet 14 includes a pressing portion (also referred to as a pusher or a pusher) 15 that protrudes toward the outer periphery of the through hole 17 a of the perforated dome-shaped contact 17. In this embodiment, the pressing portion 15 has a cylindrical shape, has a bottom portion 15a on the elastic sheet 14 side, and has an opening on the perforated dome-shaped contact 17 side. The pressing portions 15 are integrally formed with the elastic sheet 14 in the same number as the operation keys 13 or more. In other words, in this embodiment, the pressing portion 15 is preferably composed of an elastic body having a siloxane bond, for example, silicone rubber, like the elastic sheet 14. The suitable thickness of the elastic sheet 14 is 0.2 mm to 2.0 mm, more preferably 0.3 mm to 0.7 mm. The suitable thickness of the press part 15 is 0.1 mm-2.0 mm, More preferably, it is 0.4 mm-1.0 mm.

  The perforated dome-shaped contact 17 is a contact formed by molding a material (preferably metal) having excellent conductivity into a thin dome shape. As the perforated dome-shaped contact point 17, stainless steel, copper alloys such as bronze and phosphor bronze, plated or vapor-deposited materials thereof, or molded products printed with polyester and carbon can be preferably used. It is possible to adopt a metal dome form that is more preferably plated. This point is the same in other embodiments. The perforated dome-shaped contact 17 has a through-hole 17a on its projecting top surface. The opening on the side opposite to the through-hole 17a of the perforated dome-shaped contact 17 is electrically connected to an electrode 23 embedded so as to expose the surface on the substrate 16 excellent in insulation. Further, in this embodiment, the substrate 16 includes an annular switch electrode 22 substantially at the center of the opening area of the perforated dome-shaped contact 17 (a position directly below the protruding top surface). The substrate 16 includes an LED 18 at the center of the annular switch electrode 22. Light emitted from the LED 18 can pass through the through-hole 17a and pass through the elastic sheet 14 and further to the operation key 13. For this reason, it is preferable that the elastic sheet 14 has translucency. When the operation key 13 is pushed into the perforated dome-shaped contact 17, the outer peripheral portion of the through-hole 17 a of the perforated dome-shaped contact 17 is buckled and deformed by the pressing portion 15, and the back surface thereof contacts the switch electrode 22. As a result, the electrode 23 electrically connected to the opening formed on the side opposite to the through hole 17a of the perforated dome-shaped contact 17 and the switch electrode 22 are electrically connected, and the switch is turned on. Note that the switch electrode 22 and the electrode 23 are not essential components and may not be provided. In this case, the perforated dome-shaped contact 17 is a dome-shaped member that can be elastically deformed and restored to its original shape by pressing and releasing from the operation key 13, and does not perform a switch function.

  The surface of the substrate 16 including the perforated dome-shaped contact 17 is covered with a coating layer 20. The covering layer 20 is a layer whose constituent material is not particularly limited. Examples of the constituent material of the coating layer 20 include thermosetting elastomers such as silicone rubber, urethane rubber, isoprene rubber, ethylene propylene rubber, natural rubber, ethylene propylene diene rubber, and styrene butadiene rubber; urethane, ester, and styrene An olefin-based, butadiene-based, or fluorine-based thermoplastic elastomer, or a composite thereof can be used. Nitrile rubber (NBR) may be used as the constituent material. Furthermore, the coating layer 20 may be a layer made of a material other than the rubber, for example, a resin layer. In this embodiment, the covering layer 20 is preferably made of silicone rubber. The suitable thickness of the coating layer 20 is 0.01 mm to 0.2 mm, more preferably 0.02 mm to 0.1 mm. The covering layer 20 may be formed for each perforated dome-shaped contact 17. Alternatively, the silane coupling agent layer 21 may be formed directly on the perforated dome-shaped contact 17 without forming the coating layer 20.

  The coating layer 20 includes a silane coupling agent layer 21 made of a silane coupling agent on the surface on the front side (surface on the pressing portion 15 side). The silane coupling agent may be of any type, for example, KBE-903 manufactured by Shin-Etsu Chemical Co., Ltd., or a primer prepared by diluting 1-2 types of silane coupling agents with a solvent. Alternatively, an aminosilane-based primer (for example, KPB-40 manufactured by Shin-Etsu Chemical Co., Ltd.) may be used. The silane coupling agent layer 21 may be formed on the surface of the coating layer 20 by any method such as printing, painting, application, transfer, and integral molding. A suitable thickness of the silane coupling agent layer 21 is 1 μm to 15 μm, and more preferably 2 μm to 8 μm. The silane coupling agent layer 21 and the pressing portion 15 are directly joined, and are joined in a form in which no adhesive is interposed at the boundary portion between them. Such bonding is referred to as “direct bonding” in the present application. The joining mechanism will be briefly described below.

When an excimer lamp, which is an example of an ultraviolet irradiation medium that can irradiate ultraviolet rays, is used to irradiate both joint surfaces of the pressing portion 15 and the silane coupling agent layer 21 with ultraviolet rays having a wavelength of 172 nm, Directly acting on oxygen (O ₂ ) to generate active oxygen (O ( ¹ D)). In addition, the ultraviolet rays change oxygen (O ₂ ) into ozone (O ₃ ), and change ozone (O ₃ ) into oxygen (O ₂ ) and active oxygen (O ( ¹ D)). In the initial state before bonding, CH ₃ groups exist on both bonding surfaces of the pressing portion 15 and the silane coupling agent layer 21. Here, when both the joint surfaces are irradiated with ultraviolet rays, the surface layers of both the joint surfaces are oxidized by the ultraviolet rays and active oxygen generated by irradiating the surrounding oxygen with ultraviolet rays. As a result, CH ₃ groups on both junction surfaces are oxidized to form OH groups. After that, when the pressing portion 15 and the silane coupling agent layer 21 are bonded together, and a load is applied in the direction in which they are in contact with each other, and is held at room temperature for a predetermined time, OH groups on both bonding surfaces are bonded to generate water. The silicon (Si) on the pressing portion 15 side and the silicon (Si) on the silane coupling agent layer 21 side are bonded through oxygen (O). In this way, a state in which the bonding surfaces of the pressing portion 15 and the silane coupling agent layer 21 are molecularly bonded without interposing any adhesive is referred to as integral bonding or direct bonding. Since both joint surfaces after irradiation with the ultraviolet rays are in a state where they can be easily joined to each other, the surface layer portion is referred to as an “adhesive active layer”. In addition to the excimer lamp, the two adhesion surfaces after the easy adhesion treatment by vacuum plasma treatment, atmospheric pressure plasma treatment, frame treatment or corona treatment may be superposed and joined together.

  As described above, the pushbutton switch member 1 includes the perforated dome-shaped contact 17 having the through hole 17a penetrating the projecting top, the operation key 13 disposed to face the projecting side of the perforated dome-shaped contact 17, and the perforated A pressing portion 15 disposed between the dome-shaped contact 17 and the operation key 13 and fixed to the perforated dome-shaped contact 17 side, and an interior covered with the perforated dome-shaped contact 17, through the through-hole 17 a. LED 18 which is an example of illuminating means that can illuminate on the operation key 13 side, and the operation key 13 is pressed in the direction of the perforated dome-shaped contact 17 so that the perforated dome-shaped contact 17 can be elastically buckled and deformed. And The pressing portion 15 is arranged so as to connect between the perforated dome-shaped contact 17 and the operation key 13 on the outer periphery of the through-hole 17 a of the perforated dome-shaped contact 17. The push button switch member 1 includes the elastic sheet 14 including the pressing portion 15 as a first elastic layer having a siloxane bond, and includes a silane coupling agent layer 21 on the other surface in contact with the elastic sheet 14. The pressing portion 15 included in the first elastic layer and the silane coupling agent layer 21 formed on the surface of the perforated dome-shaped contact 17 are directly joined without using an adhesive. The pressing portion 15 is integrally fixed to the elastic sheet 14 on the operation key 13 side. Since the push button switch member 1 having such a structure directly joins the pressing portion 15 and the silane coupling agent layer 21 on the perforated dome-shaped contact 17, it is surely present when the operation key 13 is pressed. It can be buckled and deformed directly from the top surface of the hole dome-shaped contact 17. In addition, such bonding eliminates the risk of the adhesive overflowing to the inner peripheral surface of the through hole 17a or dripping from the through hole 17a to the LED 18, and reducing the thickness of the push button switch member 1 and reducing the stroke. Also contributes to pressing. Even if the through-hole 17 a is formed in the perforated dome-shaped contact 17, the elastic sheet 14 including the pressing portion 15 is disposed above the perforated dome-shaped contact 17. The waterproofness of 1 can be improved.

(Second Embodiment)
FIG. 3 shows a cross-sectional view of the push button switch member according to the second embodiment, taken along the line XX in FIG. 4 is a rear view of the elastic sheet constituting the push button switch member of FIG. 3, a perforated dome-shaped contact constituting the push button switch member, and a plan view (4A) of the periphery thereof, and a region C in FIG. An enlarged sectional view (4B) is shown respectively. In FIG. 4 (4A), the shaded area D of the portion drawn by the alternate long and short dash line in the elastic sheet is the surface in contact with the pressing portion of the perforated dome-shaped contact, and the thick line in the perforated dome-shaped contact The shaded area of the drawn part is a surface where the cylindrical pressing part protruding in the surface direction of the paper is in contact with the elastic sheet.

  The switch member 1a for a push button according to the second embodiment is different in that the pressing portion 20a is formed on the side of the perforated dome-shaped contact 17 instead of the elastic sheet 14 located immediately below the operation key 13. This is largely different from the push button switch member 1 according to the first embodiment. In addition, the push button switch member 1a includes the coating layer 20 only on the surface on the protruding side of the perforated dome-shaped contact 17, and does not include the coating layer 20 on the front surface of the substrate 16. Also, it is different from the pushbutton switch member 1 in that the pressing portion 20a forming a part of the covering layer 20 is directly joined to the elastic sheet 14 without providing the silane coupling agent layer on the surface of 20.

  In the configuration other than the above, the push button switch member 1 a is common to the push button switch member 1. That is, the casing 11, the operation key 13, the substrate 16, the perforated dome-shaped contact 17, the LED 18, and the switch electrode 22 are the same as those described in the first embodiment. In this embodiment, parts that are the same as those in the previous embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.

  In the pushbutton switch member 1a, the covering layer 20 including the pressing portion 20a and the elastic sheet 14 are preferably composed of an elastic body having a siloxane bond, for example, silicone rubber. The pressing portion 20a and the elastic sheet 14 are directly joined to each other without interposing any adhesive. Irradiation of ultraviolet rays to both joint surfaces of the pressing portion 20a and the elastic sheet 14 can be performed by the method described in the first embodiment. The mechanism is the same.

  As described above, in the push button switch member 1 a, the pressing portion 20 a is arranged so as to connect the perforated dome-shaped contact 17 and the operation key 13 around the through-hole 20 a of the perforated dome-shaped contact 17. ing. Further, the coating layer 20 including the pressing portion 20a is formed of the second elastic layer having a siloxane bond, while the other surface in contact with the pressing portion 20a is formed of the first elastic layer having a siloxane bond. The elastic sheet 14 is provided. Furthermore, the covering layer 20 (an example of the second elastic body layer) including the pressing portion 20a and the elastic sheet 14 (an example of the first elastic body layer) are directly joined. The pressing part 20a is fixed to the perforated dome-shaped contact 17 side, but at least the top surface of the pressing part 20a on the operation key 13 side surface of the perforated dome-shaped contact 17 is composed of the second elastic layer. And it can also comprise from the material different from a 2nd elastic body layer except the top part of the press part 20a. Since the elastic sheet 14 directly under the operation key 13 and the pressing portion 20a on the perforated dome-shaped contact 17 side are directly joined, the same operation and effect as the push button switch member 1 according to the first embodiment are obtained. It is done.

(Third embodiment)
FIG. 5 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the third embodiment. ) And an enlarged sectional view (5B) similar to FIG. 2 (2B), respectively. In FIG. 5 (5A), the shaded area of the portion drawn with a thick line in the elastic sheet is a surface where the pressing portion protruding in the surface direction of the paper comes into contact with the perforated dome-shaped contact, and the perforated dome shape A shaded area E in a portion drawn with a one-dot chain line in the contact is a surface in contact with the pressing portion.

  In the push button switch member 1b according to the third embodiment, the pressing portion 15 is formed on the elastic sheet 14 located immediately below the operation key 13, as in the first embodiment. As with the push button switch member 1a according to the second embodiment, the perforated dome-shaped contact 17 includes only the coating layer 20 on the surface on the protruding side, and does not include the silane coupling agent layer. The covering layer 20 does not cover the surface of the substrate 16 like the push button switch member 1a according to the second embodiment. As described above, the push button switch member 1b according to the third embodiment is configured by combining the configurations common to the first embodiment and the second embodiment. is there. That is, the pressing portion 15 is not a complete cylindrical shape, but opens a part of its side wall (exactly, two locations in opposite directions). The detailed configuration of the pressing unit 15 will be described later.

  The casing 11, the operation key 13, the substrate 16, the perforated dome-shaped contact 17, the LED 18, and the switch electrode 22 are the same as those described in the first embodiment. In this embodiment, parts that are the same as those in the first and second embodiments are given the same reference numerals, and redundant descriptions thereof are omitted.

  The pressing portion 15 provided in the pushbutton switch member 1b according to this embodiment has an opening 15b in a part of the outer wall with the direction connecting the operation key 13 and the perforated dome-shaped contact 17 as an axis. Then, the light emitted from the LED 18 can be emitted from the opening 15b. In this embodiment, two openings 15b are provided at positions facing each other on a line passing through the center of the pressing portion 15 in plan view. However, the number of the openings 15b and the locations where the openings 15b are formed are not limited to those described above. The pressing part 15 is joined on the coating layer 20 on the perforated dome-shaped contact 17 side in the form of a substantially fan-shaped curved column in plan view. The through hole 17 a formed in the perforated dome-shaped contact 17 communicates with the opening 15 b of the pressing portion 15. Therefore, when the perforated dome-shaped contact 17 is buckled and deformed by pressing from the operation key 13, air (air) in the inner region of the perforated dome-shaped contact 17 passes through the opening 15b and the perforated dome-shaped contact 17 You can go outside the 17 dome. Such a structure contributes to facilitating the buckling deformation by allowing air to easily enter and exit the inside and outside of the perforated dome-shaped contact 17 when the perforated dome-shaped contact 17 is pressed and released.

  In the pushbutton switch member 1b, the elastic sheet 14 including the pressing portion 15 and the covering layer 20 are preferably configured by an elastic body having a siloxane bond, for example, silicone rubber. The pressing part 15 and the coating layer 20 are directly joined without interposing any adhesive at the boundary part between them. Irradiation of ultraviolet rays to both joint surfaces of the pressing portion 15 and the coating layer 20 can be performed by the method described in the first embodiment. The mechanism is the same.

  As described above, in the push button switch member 1 b, the two pressing portions 15 are connected between the perforated dome-shaped contact 17 and the operation key 13 on the outer periphery of the through-hole 17 a of the perforated dome-shaped contact 17. Is arranged. The elastic sheet 14 including the pressing portion 15 is configured by a first elastic layer having a siloxane bond, and the covering layer 20 in contact with the pressing portion 15 is also configured by a second elastic layer having a siloxane bond. . The pressing portion 15 (included in a part of the elastic sheet 14 which is an example of the first elastic layer) and the coating layer 20 (an example of the second elastic layer) are directly joined without an adhesive. Become. The pressing portion 15 is fixed to the elastic sheet 14 directly below the operation key 13 and is a part of the first elastic layer. However, on the surface on the operation key 13 side, at least only the top surface of the pressing portion 15 is composed of the first elastic body layer, and other than the top portion of the pressing portion 15 is composed of a material different from the first elastic body layer. You can also. Since the pressing portion 15 of the elastic sheet 14 directly below the operation key 13 and the covering layer 20 on the perforated dome-shaped contact 17 side are directly joined, the push button switch according to the first embodiment other than the improvement in waterproofness The same operation and effect as the member 1 can be obtained.

(Fourth embodiment)
FIG. 6 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the fourth embodiment (6A). ) And an enlarged cross-sectional view (6B) similar to FIG. 2 (2B), respectively. In FIG. 6 (6A), the shaded area F of the portion drawn by the alternate long and short dash line in the elastic sheet is the surface in contact with the pressing portion, and the shaded area of the portion drawn by the thick line in the perforated dome-shaped contact Is a surface on which the pressing portion protruding in the surface direction contacts the elastic sheet.

  The push button switch member 1c according to the fourth embodiment is different in that the pressing portion 20a is formed on the perforated dome-shaped contact 17 side instead of the elastic sheet 14 located immediately below the operation key 13. This is largely different from the push button switch member 1b according to the third embodiment. In other configurations, the push button switch member 1c is common to the push button switch member 1b. That is, the casing 11, the operation key 13, the substrate 16, the perforated dome-shaped contact 17, the LED 18, and the switch electrode 22 are the same as those described in the third embodiment. In this embodiment, parts that are the same as those in the previous embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.

  The pressing portion 20 a provided in the push button switch member 1 c according to this embodiment is formed on the covering layer 20 that covers the surface on the protruding side of the perforated dome-shaped contact 17. This point is common to the second embodiment. However, the pressing portion 20a of the pushbutton switch member 1c has an opening 20b in a part of the outer wall with the direction connecting the operation key 13 and the perforated dome-shaped contact 17 as an axis, and light emitted from the LED 18 Can emit light from the opening 20b. The configuration of the pressing portion 20a is common to the pressing portion 15 in the third embodiment. In this embodiment, the opening 20b is provided at two positions on a line passing through the center of the pressing portion 20a in a plan view and facing each other. However, the number of openings 20b and the locations where the openings 20b are formed are not limited to those described above. The pressing part 20a is joined on the coating layer 20 on the perforated dome-shaped contact 17 side in the form of a substantially fan-shaped curved column in plan view. The through-hole 17a formed in the perforated dome-shaped contact 17 communicates with the opening 20b of the pressing portion 20a. For this reason, when the perforated dome-shaped contact 17 is buckled and deformed by pressing from the operation key 13, the air (air) in the inner region of the perforated dome-shaped contact 17 passes through the opening 20b and the perforated dome-shaped contact 17 You can go outside the 17 dome. Such a structure contributes to facilitating the buckling deformation by allowing air to easily enter and exit the inside and outside of the perforated dome-shaped contact 17 when the perforated dome-shaped contact 17 is pressed and released.

  In the push button switch member 1c, the covering layer 20 including the pressing portion 20a and the elastic sheet 14 are preferably configured by an elastic body having a siloxane bond, for example, silicone rubber. The pressing portion 20a and the elastic sheet 14 are directly joined to each other without interposing any adhesive. Irradiation of ultraviolet rays to both joint surfaces of the pressing portion 20a and the elastic sheet 14 can be performed by the method described in the first embodiment. The mechanism is the same.

  Thus, in the push button switch member 1c, the two pressing portions 20a connect the perforated dome-shaped contact 17 and the operation key 13 at the outer periphery of the through-hole 17a of the perforated dome-shaped contact 17. Is arranged. The elastic sheet 14 in contact with the pressing portion 20a is configured by a first elastic layer having a siloxane bond. Moreover, the coating layer 20 including the pressing portion 20a is also composed of the second elastic layer having a siloxane bond, and the elastic sheet 14 (an example of the first elastic layer) and the pressing portion 20a (an example of the second elastic layer). And a part of the coating layer 20) are directly joined without an adhesive. The pressing portion 20a is formed by being fixed to the covering layer 20 that covers the protruding surface of the perforated dome-shaped contact 17, and is a part of the second elastic body layer. However, at least the top surface of the pressing portion 20a on the surface on the perforated dome-shaped contact 17 side is composed of the second elastic body layer, and other than the top portion of the pressing portion 20a is made of a material different from the second elastic body layer. It can also be configured. Since the elastic sheet 14 directly below the operation key 13 and the pressing portion 20a of the covering layer 20 on the perforated dome-shaped contact 17 side are directly joined, the push button switch according to the first embodiment other than the improvement in waterproofness The same operation and effect as the member 1 can be obtained.

(Fifth embodiment)
FIG. 7 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the fifth embodiment. ) And an enlarged sectional view (7B) similar to FIG. 2 (2B), respectively. In FIG. 7 (7A), the shaded area of the portion drawn with a thick line in the elastic sheet is a surface in which the pressing part protruding in the surface direction of the paper is in contact with the perforated dome-shaped contact, and the perforated dome shape A shaded area G in a portion drawn with a one-dot chain line in the contact is a surface in contact with the pressing portion.

  The push button switch member 1d according to the fifth embodiment is different from the push button switch member 1b according to the third embodiment in that a part of the elastic sheet 14 is shielded from light, and the other points. Is configured in common with the push button switch member 1b. That is, the casing 11, the operation key 13, the substrate 16, the perforated dome-shaped contact 17, the LED 18, and the switch electrode 22 are the same as those described in the third embodiment. In this embodiment, parts that are the same as those in the previous embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.

  The elastic sheet 14 constituting the pushbutton switch member 1d is suitably constituted by an elastic body having a siloxane bond, for example, silicone rubber, together with the coating layer 20. In the elastic sheet 14, a region above the through hole 17 a is a translucent part 30 having excellent translucency, and the other part is a light shielding part 31. In this embodiment, the light shielding portion 31 is entirely used except for the region above the through hole 17a in the elastic sheet 14 that is the first elastic body layer, but at least only the side wall of the pressing portion 15 may be used as the light shielding portion 31. The light shielding part 31 is formed by mixing a filler having excellent light shielding properties, such as black carbon, with the light-transmitting elastic sheet 14, and applying a light shielding coating on the surface of the elastic sheet 14, or forming a light shielding layer on the surface of the elastic sheet 14. It can be formed by a method such as vapor deposition. By arranging the light transmitting part 30 only in the upper part of the through hole 17a and forming the light shielding part 31 in a region other than the upper part, the light from the LED 18 is transmitted through the light transmitting part 30 of the elastic sheet 14. The operation key 13 is reached. Although the light from the LED 18 is also transmitted through the opening 15b, the possibility of illuminating the adjacent operation key 13 with a light amount equivalent to that of the upper operation key 13 is low, so the presence of the opening 15b does not hinder.

  The through hole 17 a formed in the perforated dome-shaped contact 17 communicates with the opening 15 b of the pressing portion 15. Therefore, when the perforated dome-shaped contact 17 is buckled and deformed by pressing from the operation key 13, air (air) in the inner region of the perforated dome-shaped contact 17 passes through the opening 15b and the perforated dome-shaped contact 17 You can go outside the 17 dome. Such a structure contributes to facilitating the buckling deformation by allowing air to easily enter and exit the inside and outside of the perforated dome-shaped contact 17 when the perforated dome-shaped contact 17 is pressed and released.

  The pressing part 15 and the coating layer 20 are directly joined without interposing any adhesive at the boundary part between them. Irradiation of ultraviolet rays to both joint surfaces of the pressing portion 15 and the coating layer 20 can be performed by the method described in the first embodiment. The mechanism is the same. Both joint surfaces are preferably excluded from the portion covered with the light shielding layer.

  As described above, in the push button switch member 1 d, the two pressing portions 15 are connected between the perforated dome-shaped contact 17 and the operation key 13 on the outer periphery of the through-hole 17 a of the perforated dome-shaped contact 17. Is arranged. The elastic sheet 14 including the pressing part 15 is composed of a first elastic layer having a siloxane bond. Moreover, the coating layer 20 joined to the press part 15 is also comprised by the 2nd elastic body layer which has a siloxane bond. The pressing portion 15 (a part of the elastic sheet 14 which is an example of the first elastic body layer) and the coating layer 20 (an example of the second elastic body layer) are directly bonded without interposing an adhesive. The pressing portion 15 is fixed to the elastic sheet 14 and is a part of the first elastic body layer. However, it is also possible to configure only the top surface of the pressing portion 15 from the first elastic body layer, and to configure other than the top portion of the pressing portion 15 from a material different from the first elastic body layer. Since the pressing portion 15 and the covering layer 20 are directly joined, the same operation and effect as the push button switch member 1 according to the first embodiment can be obtained except for the improvement of waterproofness. Furthermore, it is possible to illuminate the operation key 13 with high luminance by forming the light shielding portion 31.

(Sixth embodiment)
FIG. 8 is a plan view of a perforated dome-shaped contact constituting the push button switch member and a back view of the elastic sheet constituting the push button switch member in the push button switch member according to the sixth embodiment (8A). ) And an enlarged sectional view (8B) similar to FIG. 2 (2B). In FIG. 8 (8A), the shaded area H of the portion drawn by the alternate long and short dash line in the elastic sheet is the surface in contact with the pressing portion, and the shaded area of the portion drawn by the thick line in the perforated dome-shaped contact Is a surface on which the pressing portion protruding in the surface direction contacts the elastic sheet.

  The push button switch member 1e according to the sixth embodiment is different from the push button switch member 1c according to the fourth embodiment in that the covering layer 20 covering the perforated dome-shaped contact 17 is shielded from light. The other points are common to the push button switch member 1c. That is, the casing 11, the operation key 13, the elastic sheet 14, the substrate 16, the perforated dome-shaped contact 17, the LED 18, and the switch electrode 22 are the same as those described in the fourth embodiment. In this embodiment, parts that are the same as those in the previous embodiment are given the same reference numerals, and redundant descriptions thereof are omitted.

  The elastic sheet 14 constituting the pushbutton switch member 1e is preferably composed of an elastic body having a siloxane bond, for example, silicone rubber, together with the coating layer 20. The pressing portion 20a forms a part of the coating layer 20. In this embodiment, the entire coating layer 20 is a light shielding portion 31. However, at least only the side wall of the pressing portion 20 a may be used as the light shielding portion 31. By forming the light-shielding part 31 at least on the side wall of the pressing part 20a, the light from the LED 18 illuminates the elastic sheet 14 without leaking from the side wall of the pressing part 20a, and the one or more operation keys 13 positioned above it. To reach.

  The through-hole 17a formed in the perforated dome-shaped contact 17 communicates with the opening 20b of the pressing portion 20a. For this reason, when the perforated dome-shaped contact 17 is buckled and deformed by pressing from the operation key 13, the air (air) in the inner region of the perforated dome-shaped contact 17 passes through the opening 20b and the perforated dome-shaped contact 17 You can go outside the 17 dome. Such a structure contributes to facilitating the buckling deformation by allowing air to easily enter and exit the inside and outside of the perforated dome-shaped contact 17 when the perforated dome-shaped contact 17 is pressed and released.

  The pressing portion 20a and the elastic sheet 14 are directly joined to each other without interposing any adhesive. Irradiation of ultraviolet rays to both joint surfaces of the pressing portion 20a and the elastic sheet 14 can be performed by the method described in the first embodiment. The mechanism is the same. Both joint surfaces are preferably excluded from the portion covered with the light shielding layer.

  As described above, in the push button switch member 1e, the two pressing portions 20a connect the perforated dome-shaped contact 17 and the operation key 13 at the outer periphery of the through-hole 17a of the perforated dome-shaped contact 17. Has been placed. The covering layer 20 including the pressing portion 20a is configured by a second elastic body layer having a siloxane bond. The elastic sheet 14 is also composed of a first elastic layer having a siloxane bond. The pressing portion 20a (a part of the coating layer 20 which is an example of the second elastic body layer) and the elastic sheet 14 (an example of the first elastic body layer) are directly joined without an adhesive. The pressing part 20a is fixed to the coating layer 20 and is a part of the second elastic body layer. However, it is also possible to configure only the top surface of the pressing portion 20a from the second elastic layer, and to configure other than the top portion of the pressing portion 20a from a material different from the second elastic layer. Since the pressing portion 20a and the elastic sheet 14 are directly joined, the same operations and effects as the push button switch member 1 according to the first embodiment can be obtained except for the improvement of waterproofness. Furthermore, it is possible to illuminate the operation key 13 with high luminance by forming the light shielding portion 31.

2. Manufacturing Method of Pushbutton Switch Member FIG. 9 shows a flow of main steps in a preferred embodiment of the manufacturing method of the pushbutton switch member of the present invention.

  The manufacturing method of the switch member for a push button according to this embodiment irradiates the opposite surfaces of both the first elastic layer and the second elastic layer or the silane coupling agent layer with ultraviolet rays, It includes an adhesive active layer forming step of forming an adhesive active layer having higher adhesiveness on the opposite surface than before irradiation with ultraviolet light, and a bonding step of directly bonding the adhesive active layers together. More details are as follows.

  As shown in FIG. 9, the manufacturing method of the push button switch member includes a first elastic layer forming step (S100) of forming a first elastic layer on the operation key 13 side or the perforated dome-shaped contact 17 side, A second elastic body layer forming step (S200) for forming a second elastic body layer or a silane coupling agent layer (referred to as a second elastic body layer) on the surface to be joined to the first elastic body layer; An adhesive active layer forming step (S300) in which an adhesive active layer is formed by irradiating ultraviolet rays onto the respective joint surfaces of the elastic body layer and the second elastic body layer, etc., and the formed adhesive active layers are joined together. Joining process (S400). In the first elastic layer forming step, any method such as coating, bonding, and integral molding may be used as long as the first elastic layer can be formed on the operation key 13 or the perforated dome-shaped contact 17. Similarly, in the second elastic layer forming step, any method such as coating, bonding, or integral molding may be used as long as the second elastic layer or the silane coupling agent layer can be formed on the operation key 13 or the perforated dome-shaped contact 17 side. May be. The adhesion active layer forming step is a kind of surface treatment that improves the adhesion of the surface irradiated with ultraviolet rays. It is preferable to perform the joining step as soon as possible after such surface treatment. The joining step can be easily performed at room temperature (20 to 25 ° C.), but may be performed by heating from room temperature to any temperature in the range of 25 to 95 ° C. Further, in the joining step, it is preferable to apply weight from the direction in which the joining surfaces are joined to each other. Furthermore, it is preferable to leave for a while after the joining step. The first elastic body layer and the silane coupling agent layer are preferably joined in a state where force is applied in the joining direction (however, the perforated dome-shaped contact 17 is not deformed). .

(First embodiment)
In the manufacturing method of the pushbutton switch member 1 (see FIG. 2) according to the first embodiment, the elastic sheet 14 (including the pressing portion 15 and corresponding to the first elastic body layer) is formed on the operation key 13 side. A first elastic layer forming step (S100), a second elastic layer forming step (S200) for forming the silane coupling agent layer 21 on the surface of the elastic sheet 14 on the side to be bonded to the pressing portion 15, and an elastic sheet. The adhesive active layer forming step (S300) of forming an adhesive active layer by irradiating ultraviolet rays to the respective joint surfaces of the pressing portion 15 and the silane coupling agent layer 21 and forming the adhesive active layers Joining step (S400) to join.

(Second Embodiment)
The push button switch member 1a according to the second embodiment (see FIG. 4) includes a first elastic layer forming step (S100) of forming an elastic sheet 14 (corresponding to the first elastic layer) on the operation key 13 side. ) And a second elastic body layer forming step for forming a covering layer 20 (corresponding to the second elastic body layer) including the pressing portion 20a on the surface of the perforated dome-shaped contact 17 on the side to be joined to the elastic sheet 14 ( S200), and an adhesive active layer forming step (S300) in which an adhesive active layer is formed by irradiating ultraviolet rays onto the respective joint surfaces of the elastic sheet 14 and the pressing portion 20a of the covering layer 20, and the formed adhesive activity Bonding step (S400) for bonding the layers together.

(Third embodiment)
In the manufacturing method of the pushbutton switch member 1b (see FIG. 5) according to the third embodiment, the elastic sheet 14 (including the pressing portion 15 and corresponding to the first elastic body layer) is formed on the operation key 13 side. The first elastic body layer forming step (S100) and the second forming the covering layer 20 (corresponding to the second elastic body layer) on the surface of the perforated dome-shaped contact 17 on the side to be joined to the pressing portion 15 of the elastic sheet 14. An elastic body layer forming step (S200) and an adhesive active layer forming step (S300) for forming an adhesive active layer by irradiating ultraviolet rays onto the respective joint surfaces of the pressing portion 15 and the covering layer 20 of the elastic sheet 14. And a joining step (S400) for joining the formed adhesive active layers together.

(Fourth embodiment)
In the manufacturing method of the pushbutton switch member 1c (see FIG. 6) according to the fourth embodiment, the first elastic body layer is formed by forming the elastic sheet 14 (corresponding to the first elastic body layer) on the operation key 13 side. Step (S100), a second elastic layer or the like that forms a coating layer 20 (including the pressing portion 20a and corresponding to the second elastic layer) on the surface of the perforated dome-shaped contact 17 that is to be joined to the elastic sheet 14 A forming step (S200), an adhesive active layer forming step (S300) in which an adhesive active layer is formed by irradiating ultraviolet rays onto the respective joint surfaces of the pressing portion 20a of the covering layer 20 and the elastic sheet 14. Bonding step (S400) for bonding the adhesive active layers together.

(Fifth embodiment)
The push button switch member 1d (see FIG. 7) according to the fifth embodiment includes an elastic sheet 14 (including a light-shielded pressing portion 15) that shields light other than the translucent portion 30 on the operation key 13 side, and includes a first elastic member. The first elastic body layer forming step (corresponding to the body layer) (S100), and the covering layer 20 (corresponding to the second elastic body layer) on the surface of the perforated dome-shaped contact 17 where the pressing portion 15 is joined. The second elastic body layer forming step (S200) to be formed, and the adhesive active layer forming step (S300) of forming an adhesive active layer by irradiating each bonding surface of the pressing portion 15 and the coating layer 20 with ultraviolet rays. And a joining step (S400) for joining the formed adhesive active layers together.

(Sixth embodiment)
The push button switch member 1e according to the sixth embodiment (see FIG. 8) is a first elastic layer forming step (S100) for forming an elastic sheet 14 (corresponding to the first elastic layer) on the operation key 13 side. ) And a second elastic body layer or the like that forms a light-shielding coating layer 20 (including the pressing portion 20a and corresponding to the second elastic body layer) on the surface of the perforated dome-shaped contact 17 where the elastic sheet 14 is joined. Step (S200), an adhesive active layer forming step (S300) in which an adhesive active layer is formed by irradiating ultraviolet rays to the respective joint surfaces of the elastic sheet 14 and the pressing portion 20a, and the formed adhesive active layers Joining step (S400).

3. Other Embodiments While the preferred embodiments of the pushbutton switch member and the manufacturing method thereof according to the present invention have been described above, the present invention is not limited to the above-described embodiments and can be variously modified and implemented. is there.

  For example, in the first embodiment, the covering layer 20 formed on the projecting surface side of the perforated dome-shaped contact 17 is made of an elastic body having a siloxane bond, preferably silicone rubber, on which a silane coupling is formed. When the agent layer 21 is formed, a layer made of a material other than an elastic body having a siloxane bond may be used. Similarly, when a layer corresponding to the coating layer 20 is formed immediately below the operation key 13 and then a silane coupling agent layer is formed, the layer is also an elastic body having a siloxane bond, preferably a silicone rubber. However, it may be a layer made of a material other than an elastic body having a siloxane bond. The elastic body having a siloxane bond may be a composite of silicone rubber or silicone resin and other rubber or resin other than silicone rubber.

  When the elastic sheet 14 provided directly below the operation key 13 and the coating layer 20 provided on the top of the perforated dome-shaped contact 17 are directly joined as in the second to sixth embodiments, silane coupling Since there is no agent layer, any one of the elastic sheet 14 and the coating layer 20 may be used as the first elastic layer, and the other may be used as the second elastic layer. Conversely, as in the first embodiment, when the silane coupling agent layer 21 is present, the side (elastic sheet 14 in the first embodiment) bonded to the silane coupling agent layer 21 is connected to the first elastic layer. To do.

  In the second to sixth embodiments, a silane coupling agent layer is formed immediately below the elastic sheet 14, and a coating layer 20 (corresponding to the first elastic layer) is formed on the top of the perforated dome-shaped contact 17. Then, both layers may be directly joined. In that case, the pressing part may be on the elastic sheet 14 side or the coating layer 20 side. Further, in the second to sixth embodiments, when the coating layer 20 is formed directly above or directly above the perforated dome-shaped contact 17, a silane coupling agent layer is formed immediately above it, An elastic sheet (corresponding to the first elastic body layer) may be formed directly under the operation key 13 and both layers may be directly joined. In that case, the pressing part may be on the elastic sheet 14 side or the coating layer 20 side.

  The constituent elements of the pushbutton switch members 1, 1a, 1b, 1c, 1d, and 1e in the first to sixth embodiments can be arbitrarily combined with each other unless they cannot be combined. As an example, in the first embodiment, the pressing portion 15 having the opening 15b may be provided on the side wall portion in the third embodiment. Further, in the first embodiment, the light shielding portion 31 in the fifth embodiment may be formed on the elastic sheet 14.

  The pushbutton switch member according to the present invention can be used for various devices including operation keys such as a portable communication device, a PC, a camera, an in-vehicle electronic device, a home audio device, and a home appliance.

1, 1a, 1b, 1c, 1d, 1e Pushbutton switch member 13 Operation key 14 Elastic sheet (first elastic layer or second elastic layer)
15 Pressing part 15b Opening part 17 Perforated dome-shaped contact 17a Through-hole 18 LED (an example of illumination means)
20 Coating layer (first elastic layer or second elastic layer)
20a Press part 21 Silane coupling agent layer 31 Light-shielding part

Claims (9)

A perforated dome-shaped contact having a through-hole penetrating the protruding top;
An operation key disposed opposite to the protruding side of the perforated dome-shaped contact;
A pressing portion disposed between the perforated dome-shaped contact and the operation key and fixed to either the perforated dome-shaped contact side or the operation key side;
An illuminating means located inside the perforated dome-shaped contact, and illuminating the operation key side through the through hole;
A switch member for a pushbutton that presses the operation key in the direction of the perforated dome-shaped contact to elastically buckle and deform the perforated dome-shaped contact,
The pressing portion is arranged so as to connect between the perforated dome-shaped contact and the operation key in the outer periphery of the through-hole of the perforated dome-shaped contact.
A first elastic body having a siloxane bond on one of the surface including at least a part of the pressing part and the surface on the operation key side or the perforated dome-shaped contact side in contact with the part of the pressing part. A second elastic layer having a siloxane bond or a silane coupling agent layer on the other surface in contact with the first elastic layer,
A switch member for a push button formed by directly joining the first elastic body layer and the second elastic body layer, or the first elastic body layer and the silane coupling agent layer. The pressing part is fixed to the operation key side,
2. The switch member for a push button according to claim 1, wherein the first elastic body layer is provided on a surface including at least a top portion of the pressing portion on a surface of the operation key on the perforated dome-shaped contact side. The pressing part is fixed to the operation key side,
2. The pushbutton switch member according to claim 1, wherein the second elastic body layer or the silane coupling agent layer is provided on a surface including at least a top portion of the pressing portion on a surface of the operation key on the perforated dome-shaped contact side. . The pressing portion is fixed to the perforated dome-shaped contact side,
2. The switch member for a push button according to claim 1, wherein the first elastic body layer is provided on a surface including at least a top portion of the pressing portion on the surface on the operation key side of the perforated dome-shaped contact. The pressing portion is fixed to the perforated dome-shaped contact side,
2. The switch member for a push button according to claim 1, wherein the second elastic body layer or the silane coupling agent layer is provided on a surface including at least a top portion of the pressing portion on the surface on the operation key side of the perforated dome-shaped contact. . The pressing portion has an opening in a part of an outer wall whose axis is a direction connecting the operation key and the perforated dome-shaped contact,
The switch member for a push button according to any one of claims 1 to 5, wherein light emitted from the illumination means can be emitted from the opening. Between the operation key and the perforated dome-shaped contact, the first elastic layer and the second elastic layer,
The push button according to any one of claims 1 to 6, wherein a light shielding portion is formed at least on a side wall of the pressing portion formed in the first elastic body layer or the second elastic body layer. Switch member.   The pushbutton switch member according to any one of claims 1 to 7, wherein at least one of the first elastic body layer and the second elastic body layer is made of silicone rubber. A perforated dome-shaped contact having a through-hole penetrating the projecting top, an operation key disposed opposite to the projecting side of the perforated dome-shaped contact, and disposed between the perforated dome-shaped contact and the operation key. And a pressing portion fixed to either the perforated dome-shaped contact side or the operation key side, and an interior covered by the perforated dome-shaped contact, and illuminating the operation key side through the through hole A switch member for a push button that is capable of elastically buckling and deforming the perforated dome-shaped contact by pressing the operation key in the direction of the perforated dome-shaped contact. And
The pressing portion is arranged so as to connect between the perforated dome-shaped contact and the operation key in the outer periphery of the through-hole of the perforated dome-shaped contact.
A first elastic body having a siloxane bond on one of the surface including at least a part of the pressing part and the surface on the operation key side or the perforated dome-shaped contact side in contact with the part of the pressing part. A second elastic layer having a siloxane bond or a silane coupling agent layer on the other surface in contact with the first elastic layer,
Irradiate ultraviolet rays to the opposing surfaces of both the first elastic layer and the second elastic layer or the silane coupling agent layer, and adhere to the opposing surfaces as compared to before irradiation with ultraviolet rays. An adhesive active layer forming step for forming a highly adhesive active layer;
A bonding step of directly bonding the adhesive active layers;
Of manufacturing a pushbutton switch member.