JP2008234961A - Key top plate - Google Patents

Key top plate Download PDF

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Publication number
JP2008234961A
JP2008234961A JP2007071941A JP2007071941A JP2008234961A JP 2008234961 A JP2008234961 A JP 2008234961A JP 2007071941 A JP2007071941 A JP 2007071941A JP 2007071941 A JP2007071941 A JP 2007071941A JP 2008234961 A JP2008234961 A JP 2008234961A
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side plate
plate member
key top
adhesive layer
synthetic resin
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Tatsuya Okamura
達也 岡村
Atsushi Hari
篤志 播
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Teikoku Tsushin Kogyo Co Ltd
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Teikoku Tsushin Kogyo Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a key top plate allowing its thickness to be reduced, allowing a surface thereof to be easily flattened, capable of making a pressing touch reasonably hard and excellent one, and allowing lamination and adhesion between a plurality of members comprising synthetic resin films and the like to be accurately and easily carried out. <P>SOLUTION: This key top plate 1-1 with a plurality of key tops 310 pressing switch contacts 431 arranged thereon is composed. The key top plate 1-1 is composed by integrally sticking a front surface-side plate member 210 formed of a synthetic resin film 211, a back surface-side plate member 230 formed of a synthetic resin film 231, and a rubber-like elastic plate 250 on one another in that order through first and second adhesion layers 270 and 290. The first adhesion layer 270 is formed with an adhesion layer including a thermosetting resin or a thermoplastic resin in a photo-curing resin, and the second adhesion layer 290 is formed with an adhesion layer formed of a photo-curing resin. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、スイッチ接点を押圧するキートップを複数設置してなるキートップ板に関するものである。   The present invention relates to a key top plate having a plurality of key tops that press switch contacts.

従来、例えば1枚の可撓性を有する合成樹脂フイルム中に複数の成形樹脂製のキートップ本体を取り付けることで複数のキートップを設けてなるキートップ板がある(例えば特許文献1の図3参照)。しかしながらこの種のキートップ板においては、厚みの薄型化が図れず、また合成樹脂フイルムにキートップ本体を取り付ける等、その製造工程が煩雑であって低コスト化が図れず、またキートップ板の表面を平面状にしたいという要望にも答えられない。   Conventionally, for example, there is a key top plate in which a plurality of key tops are provided by attaching a plurality of molded resin key top bodies in one flexible synthetic resin film (for example, FIG. 3 of Patent Document 1). reference). However, in this type of key top plate, the thickness cannot be reduced, the key top body is attached to a synthetic resin film, and the manufacturing process is complicated and the cost cannot be reduced. I cannot answer the desire to make the surface flat.

上記問題を解決するため、例えば特許文献1の図7や図8に示すように、キートップ板(キートップ板40,銘板98)を1枚の可撓性を有する合成樹脂フイルムで構成し、その下側に複数のスイッチ接点を配置し、キートップ板の上面を押圧してこれを撓めることで各スイッチ接点をオンオフするスイッチ機構もある。しかしながらこのキートップ板は1枚の合成樹脂フイルムで構成されているので、これを押圧した際、キートップ板の押圧感触が軟らかすぎ、良好な押圧感触が得られない等の問題があった。   In order to solve the above problem, for example, as shown in FIG. 7 and FIG. 8 of Patent Document 1, the key top plate (key top plate 40, name plate 98) is composed of one flexible synthetic resin film, There is also a switch mechanism in which a plurality of switch contacts are arranged on the lower side, and each switch contact is turned on and off by pressing the upper surface of the key top plate and bending it. However, since the key top plate is composed of a single synthetic resin film, there is a problem that when the key top plate is pressed, the pressing feeling of the key top plate is too soft and a good pressing feeling cannot be obtained.

このため例えば、可撓性を有する合成樹脂フイルムを複数枚接着材によって積層一体化してキートップ板とする方法も考えられる。このように構成すれば、キートップ板を押圧した際の押圧感触が合成樹脂フイルムを積層した分、適度に硬くなる。しかしながら2枚の合成樹脂フイルムを積層した押圧感触以上の押圧感触を得たい場合があるが、そのような要望には答えられなかった。また複数の合成樹脂フイルムを積層接着するのに感圧型の接着層を用いた場合は、両合成樹脂フイルムを接着する際に接着位置がずれるなどによって両板を精度良く接着できなくなる恐れがあった(感圧型の接着層は一度触れると引き剥がすのが困難)。さらにキートップ板の押圧感触を硬くするため、前記積層接着した合成樹脂フイルムにさらに別の部材を感圧型の接着層によって接着するような場合は、積層する接着層が増加するので、さらにそれら各部材間の正確な積層・接着が困難となっていた。これに対して前記接着層として光硬化性の樹脂材を用いれば、合成樹脂フイルムにこれを塗布しただけではその接着性が小さいので、この接着層に合成樹脂フイルムが一度触れても容易に剥がすことができ、従って合成樹脂フイルムの精度の良い積層・接着を行うことができる。しかしながら例えば2枚の合成樹脂フイルムの他にさらに別の部材を積層するような場合は、まず2枚の合成樹脂フイルムを接着層を介して積層した後に光を照射して硬化した後、再び別の部材を接着層を介して積層した後に光を照射して硬化させるなど、その製造が煩雑になるという問題があった。
特開2000−188036号公報
For this reason, for example, a method of stacking and integrating a plurality of flexible synthetic resin films with an adhesive to form a key top plate is also conceivable. If comprised in this way, the press feeling at the time of pressing a keytop board will become moderately hard for the part which laminated | stacked the synthetic resin film. However, there is a case where it is desired to obtain a pressing feeling that is higher than the pressing feeling obtained by laminating two synthetic resin films, but such a request cannot be answered. In addition, when a pressure-sensitive adhesive layer is used for laminating and bonding a plurality of synthetic resin films, there is a risk that the two plates cannot be bonded with high accuracy due to misalignment of the bonding position when bonding both synthetic resin films. (Pressure-sensitive adhesive layer is difficult to peel off once touched). Furthermore, in order to harden the pressing feeling of the key top plate, when another member is bonded to the laminated synthetic resin film with a pressure-sensitive adhesive layer, the number of adhesive layers to be laminated increases. Accurate lamination and adhesion between members has been difficult. On the other hand, if a photo-curing resin material is used as the adhesive layer, the adhesive property is small just by applying it to the synthetic resin film. Therefore, even if the synthetic resin film touches the adhesive layer once, it is easily peeled off. Therefore, the synthetic resin film can be laminated and bonded with high accuracy. However, for example, when another member is laminated in addition to two synthetic resin films, two synthetic resin films are first laminated through an adhesive layer, then cured by irradiation with light, and then separated again. There was a problem that the production of the member became complicated, for example, by irradiating light and curing it after laminating these members through an adhesive layer.
JP 2000-188036 A

本発明は上述の点に鑑みてなされたものでありその目的は、厚みの薄型化が図れ、その表面を容易に平面状にすることができ、押圧感触を適度に硬くて良好な押圧感触とすることができ、さらに合成樹脂フイルム等からなる複数の部材間の積層接着を精度良く容易に行うことができるキートップ板を提供することにある。   The present invention has been made in view of the above points, and its purpose is to reduce the thickness, to easily make the surface flat, and to make the pressing feeling moderately hard and good pressing feeling. It is another object of the present invention to provide a key top plate that can be laminated and bonded between a plurality of members made of a synthetic resin film and the like with high accuracy and easily.

本願請求項1に記載の発明は、スイッチ接点を押圧するキートップを複数設置してなるキートップ板において、前記キートップ板は、合成樹脂フイルムからなる表面側板部材と、合成樹脂フイルムからなる裏面側板部材と、ゴム状弾性板とを、この順番に第1,第2接着層を介して一体に貼り合わせて構成され、前記第1接着層を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成し、前記第2接着層を光硬化性樹脂からなる接着層で構成したことを特徴とするキートップ板にある。なお光は紫外線や赤外線を含む概念である(以下においても同様)。   The invention according to claim 1 of the present application is a key top plate in which a plurality of key tops for pressing switch contacts are installed, wherein the key top plate is a front side plate member made of a synthetic resin film and a back surface made of a synthetic resin film. The side plate member and the rubber-like elastic plate are integrally bonded in this order via the first and second adhesive layers, and the first adhesive layer is made of a photocurable resin with a thermosetting resin or thermoplastic. The key top plate is constituted by an adhesive layer containing a resin, and the second adhesive layer is constituted by an adhesive layer made of a photocurable resin. Light is a concept including ultraviolet rays and infrared rays (the same applies to the following).

本願請求項2に記載の発明は、請求項1に記載のキートップ板の製造方法において、前記表面側板部材と裏面側板部材とゴム状弾性板とを用意し、表面側板部材と裏面側板部材とを、光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含ませることで光を照射する前に微粘着性を有する第1接着層によって接着する第1接着工程と、前記裏面側板部材とゴム状弾性板とを、光硬化性樹脂からなる第2接着層によって接着する第2接着工程と、前記第1,第2接着層に同時に光を照射することでこれら第1,第2接着層を硬化する接着層硬化工程と、を有することを特徴とするキートップ板の製造方法にある。   The invention according to claim 2 of the present application is the key top plate manufacturing method according to claim 1, wherein the front side plate member, the back side plate member, and the rubber-like elastic plate are prepared, and the front side plate member and the back side plate member are provided. A first bonding step in which a thermosetting resin or a thermoplastic resin is included in the photo-curable resin before being irradiated with light by a first adhesive layer having slight adhesion, and the back side plate member and rubber A second adhesive step for adhering the elastic plate with a second adhesive layer made of a photo-curable resin, and simultaneously irradiating the first and second adhesive layers with light to attach the first and second adhesive layers to each other. An adhesive layer curing step for curing.

本願請求項3に記載の発明は、前記表面側板部材と裏面側板部材の内の少なくとも一方を、ポリエチレンテレフタレートフイルムで構成したことを特徴とする請求項2に記載のキートップ板の製造方法にある。   Invention of Claim 3 of this application exists in the manufacturing method of the key top board of Claim 2 which comprised at least one of the said surface side board member and a back surface side board member with the polyethylene terephthalate film. .

本願請求項4に記載の発明は、前記第1接着工程は、前記裏面側板部材に前記第1接着層を形成した後に、この裏面側板部材と第1接着層とに前記キートップとなる部分の周囲を切り欠くスリットを形成し、その後第1接着層に前記表面側板部材を接着する接着工程であることを特徴とする請求項2又は3に記載のキートップ板の製造方法にある。   In the invention according to claim 4 of the present application, in the first bonding step, after the first adhesive layer is formed on the back surface side plate member, the back surface side plate member and the first adhesive layer have a portion that becomes the key top. 4. The key top plate manufacturing method according to claim 2, wherein a slit is formed around the periphery, and then the front side plate member is bonded to the first adhesive layer. 5.

請求項1に記載の発明によれば、合成樹脂フイルム製の表面側板部材と裏面側板部材とゴム状弾性板とを貼り合わせてキートップ板としたので、その厚みを薄く構成でき、また容易にその表面を平面状にすることができる。また表面側板部材と裏面側板部材とゴム状弾性板とからなるキートップなので、その硬度が増して押圧感触を適度に硬くすることができて良好な押圧感触を得ることができる。
また第1接着層を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成し、第2接着層を光硬化性樹脂からなる接着層で構成したので、このキートップ板を製造する際に、積層する表面側板部材と裏面側板部材とゴム状弾性板とを加熱・加圧することなく、しかも精度良く、強い強度の接着力によってこれら各部材を一体化できる。特に第1接着層を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成したので、この接着層には微粘着性があり、従って表面側板部材と裏面側板部材との接着時に貼り直し等ができて両者の接着精度を容易に高めることができ、また予め表面側板部材と裏面側板部材とを接着しておいてそのまま半完成品として保管しておくこともでき、また表面側板部材と裏面側板部材とが接着後にずれることがないのでこれらをゴム状弾性板に精度良く容易に接着することができる。またゴム状弾性板との接着には光硬化性樹脂からなる第2接着層を用いるので、積層の際の粘着性は低く、容易且つ精度良くゴム状弾性板を積層でき、その後光を照射することで第1,第2接着層を容易且つ強固に硬化させて各部材を一体化することができる。
According to the first aspect of the present invention, the front side plate member, the back side plate member, and the rubber elastic plate made of the synthetic resin film are bonded together to form the key top plate. The surface can be planar. In addition, since the key top is composed of the front side plate member, the back side plate member, and the rubber-like elastic plate, the hardness can be increased and the pressing feeling can be appropriately hardened, and a good pressing feeling can be obtained.
Since the first adhesive layer is constituted by an adhesive layer containing a thermosetting resin or a thermoplastic resin in a photocurable resin, and the second adhesive layer is constituted by an adhesive layer made of a photocurable resin, this key top plate When these are manufactured, these members can be integrated with high accuracy and strong adhesive force without heating and pressurizing the front side plate member, the back side plate member, and the rubber-like elastic plate to be laminated. In particular, since the first adhesive layer is composed of an adhesive layer containing a thermosetting resin or a thermoplastic resin in a photo-curable resin, this adhesive layer is slightly sticky, and therefore, the surface side plate member and the back side plate member It can be re-attached at the time of bonding and the adhesion accuracy of both can be easily increased, and the front side plate member and the back side plate member can be bonded in advance and stored as a semi-finished product as it is, Since the front side plate member and the back side plate member do not shift after bonding, they can be easily and accurately bonded to the rubber-like elastic plate. In addition, since the second adhesive layer made of a photo-curable resin is used for adhesion to the rubber elastic plate, the adhesion at the time of lamination is low, the rubber elastic plate can be easily and accurately laminated, and then light is irradiated. Thus, the first and second adhesive layers can be easily and firmly cured to integrate the members.

請求項2に記載の発明によれば、表面側板部材と裏面側板部材とを、光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含ませることで光を照射する前に微粘着性を有する第1接着層によって接着し、次に裏面側板部材とゴム状弾性板とを光硬化性樹脂からなる第2接着層によって接着し、次に第1,第2接着層に同時に光を照射することで第1,第2接着層を硬化することとしたので、積層する表面側板部材と裏面側板部材とゴム状弾性板とを加熱・加圧することなく、しかも精度良く、強い強度の接着力によってこれら各部材を一体化できる。特に第1接着層を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成したので、この接着層には微粘着性があり、従って表面側板部材と裏面側板部材との接着時に貼り直し等ができて両者の接着精度を容易に高めることができ、また予め表面側板部材と裏面側板部材とを接着しておいてそのまま半完成品として保管しておくこともでき、また表面側板部材と裏面側板部材とが接着後にずれることがないのでこれらをゴム状弾性板に精度良く容易に接着することができる。またゴム状弾性板との接着には光硬化性樹脂からなる第2接着層を用いるので、積層の際の粘着性は低く、容易且つ精度良くゴム状弾性板を積層でき、その後光を照射することで第1,第2接着層を容易且つ強固に硬化させて各部材を一体化することができる。   According to the invention described in claim 2, the front side plate member and the back side plate member have slight adhesiveness before being irradiated with light by including a thermosetting resin or a thermoplastic resin in the photocurable resin. Adhering with the first adhesive layer, then adhering the back plate member and the rubber elastic plate with the second adhesive layer made of a photocurable resin, and then simultaneously irradiating the first and second adhesive layers with light Since the first and second adhesive layers are cured in this way, the surface side plate member, the back surface side plate member, and the rubber elastic plate to be laminated are heated and pressed with high precision and strong adhesive force. Each member can be integrated. In particular, since the first adhesive layer is composed of an adhesive layer containing a thermosetting resin or a thermoplastic resin in a photo-curable resin, this adhesive layer is slightly sticky, and therefore, the surface side plate member and the back side plate member It can be re-attached at the time of bonding and the adhesion accuracy of both can be easily increased, and the front side plate member and the back side plate member can be bonded in advance and stored as a semi-finished product as it is, Since the front side plate member and the back side plate member do not shift after bonding, they can be easily and accurately bonded to the rubber-like elastic plate. In addition, since the second adhesive layer made of a photo-curable resin is used for adhesion to the rubber elastic plate, the adhesion at the time of lamination is low, the rubber elastic plate can be easily and accurately laminated, and then light is irradiated. Thus, the first and second adhesive layers can be easily and firmly cured to integrate the members.

請求項3に記載の発明によれば、第1,第2接着層の硬化時に加熱・加圧する必要がないので、表面側板部材や裏面側板部材として熱に弱いが安価なポリエチレンテレフタレートフイルムを用いることができる。   According to the invention described in claim 3, since there is no need to heat and pressurize when the first and second adhesive layers are cured, a polyethylene terephthalate film that is weak against heat but inexpensive is used as the front side plate member or the back side plate member. Can do.

請求項4に記載の発明によれば、裏面側板部材に第1接着層を形成した後にスリットを形成したので、予めスリットを形成した裏面側板部材に第1接着層を後から印刷等によって形成する場合に比べ、第1接着層がスリットを形成した部分付近で不均一な厚みとならず、表面側板部材との接着を確実に行うことが可能となる。   According to the fourth aspect of the present invention, since the slit is formed after the first adhesive layer is formed on the back side plate member, the first adhesive layer is formed on the back side plate member on which the slit has been formed in advance by printing or the like. Compared to the case, the first adhesive layer does not have a non-uniform thickness in the vicinity of the portion where the slit is formed, and it is possible to reliably perform the adhesion with the surface side plate member.

以下、本発明の実施形態を図面を参照して詳細に説明する。
図1は本発明の1実施形態にかかるキートップ板1−1の分解斜視図である。同図に示すキートップ板1−1は、合成樹脂フイルム211からなる表面側板部材210と、合成樹脂フイルム231からなる裏面側板部材230と、ゴム状弾性板250とを、この順番で第1,第2接着層270,290を介して一体に貼り合わせて構成され、さらに前記裏面側板部材230に下記するキートップ310の周囲を囲むスリット233を設けて構成されている。以下各構成部品について説明する。
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is an exploded perspective view of a key top plate 1-1 according to an embodiment of the present invention. The key top plate 1-1 shown in the figure includes a front side plate member 210 made of a synthetic resin film 211, a back side plate member 230 made of a synthetic resin film 231, and a rubber-like elastic plate 250 in this order. The second adhesive layers 270 and 290 are integrally bonded to each other, and the back plate member 230 is further provided with a slit 233 surrounding the key top 310 described below. Each component will be described below.

表面側板部材210は可撓性を有する合成樹脂フイルム211を矩形状に形成し、その下面(裏面側板部材230に対向する側の面)に所望の印刷層213を形成して構成されている。この実施形態においては合成樹脂フイルム211として熱可塑性のポリエチレンテレフタレート(PET)フイルムを用いている。合成樹脂フイルム211は透明であってその厚みは50μm程度である。なお合成樹脂フイルム211の材質としてはPETフイルムに限らず、可撓性のある他の各種合成樹脂フイルム(熱可塑性でも熱硬化性でも光硬化性でも良い)であれば良く、例えばポリフェニレンスルフイド(PPS)フイルム、ポリイミド(PI)フィルム、ポリエチレンナフタレート(PEN)フイルム、ポリエーテルイミド(PEI)フイルム、ポリエーテルエーテルケトン(PEEK)フイルム、ポリエーテルケトン(PEK)フイルム、ポリカーボネート(PC)フイルム、ポリブチレンナフタレート(PBN)フイルム、ポリブチレンテレフタレート(PBT)フイルム等を用いても良い。   The front surface side plate member 210 is formed by forming a flexible synthetic resin film 211 in a rectangular shape and forming a desired printing layer 213 on the lower surface (the surface on the side facing the back surface side plate member 230). In this embodiment, a thermoplastic polyethylene terephthalate (PET) film is used as the synthetic resin film 211. The synthetic resin film 211 is transparent and has a thickness of about 50 μm. The material of the synthetic resin film 211 is not limited to a PET film, but may be any other flexible synthetic resin film (which may be thermoplastic, thermosetting, or photocurable), such as polyphenylene sulfide. (PPS) film, polyimide (PI) film, polyethylene naphthalate (PEN) film, polyetherimide (PEI) film, polyetheretherketone (PEEK) film, polyetherketone (PEK) film, polycarbonate (PC) film, Polybutylene naphthalate (PBN) film, polybutylene terephthalate (PBT) film, or the like may be used.

印刷層213は印刷(スクリーン印刷等)やその他の各種手段(蒸着等)によって形成されている。図1では印刷層213は各キートップ310(図2(b)参照)となる部分のみに形成されているが、例えば遮光性を有する印刷層を合成樹脂フイルム211の下面全体に形成して所定の位置(例えばキートップ310となる部分)に抜き文字状の透光部を設けてもよい。またその透光部を覆うように透光性を有する別の印刷層を積層しても良い。   The print layer 213 is formed by printing (screen printing or the like) or other various means (evaporation or the like). In FIG. 1, the print layer 213 is formed only on a portion that becomes each key top 310 (see FIG. 2B). For example, a print layer having a light-shielding property is formed on the entire lower surface of the synthetic resin film 211. A character-shaped translucent portion may be provided at a position (for example, a portion to be the key top 310). Moreover, you may laminate | stack another printing layer which has translucency so that the translucent part may be covered.

裏面側板部材230は可撓性を有する合成樹脂フイルム231を矩形状(合成樹脂フイルム211と同一外形寸法)に形成し、各キートップ310となる部分の周囲を囲む切り欠きからなるスリット233を設けて構成されている。この実施形態においては合成樹脂フイルム231として、熱可塑性のPETフイルムを用いている。合成樹脂フイルム231は透明であってその厚みは50μm程度である。なお合成樹脂フイルム231の材質は上記合成樹脂フイルム211と同様に、PETフイルムに限らず、可撓性のある他の各種合成樹脂フイルム(熱可塑性でも熱硬化性でも光硬化性でも良い)であれば良く、例えばPPSフイルム、PIフィルム、PENフイルム、PEIフイルム、PEEKフイルム、PEKフイルム、PCフイルム、PBNフイルム、PBTフイルム等を用いても良い。   The back-side plate member 230 is formed of a flexible synthetic resin film 231 in a rectangular shape (the same outer dimensions as the synthetic resin film 211), and provided with slits 233 made of notches surrounding the portions to be the key tops 310. Configured. In this embodiment, a thermoplastic PET film is used as the synthetic resin film 231. The synthetic resin film 231 is transparent and has a thickness of about 50 μm. The material of the synthetic resin film 231 is not limited to the PET film as in the case of the synthetic resin film 211, but may be any other flexible synthetic resin film (which may be thermoplastic, thermosetting, or photocurable). For example, a PPS film, a PI film, a PEN film, a PEI film, a PEEK film, a PEK film, a PC film, a PBN film, a PBT film, or the like may be used.

スリット233は各キートップ310となる部分の周囲を囲むように略矩形のC字状に切り欠いて形成され、裏面側板部材230を上下に貫通するように形成されている。裏面側板部材230のスリット233によって囲まれる部分は、キートップ本体部235となっている。キートップ本体部235はその周囲をスリット233によって囲まれることで周囲の部分と連結部(ヒンジ部)237を介して連結されている。   The slit 233 is formed by cutting out into a substantially rectangular C shape so as to surround the periphery of each key top 310, and is formed so as to penetrate the back side plate member 230 up and down. A portion surrounded by the slit 233 of the back side plate member 230 is a key top main body 235. The key top main body portion 235 is connected to the surrounding portion through a connecting portion (hinge portion) 237 by being surrounded by a slit 233.

ゴム状弾性板250は透光性を有する材料、例えばシリコーンゴム(例えば厚み200μm)を前記表面側板部材210及び裏面側板部材230と略同一外形寸法の略矩形の板状に形成して構成されており、表面側板部材210及び裏面側板部材230を取り付ける側の面の反対側の面の下記する各キートップ310に対向する位置にそれぞれ突起状の押圧部251を設けている。なおゴム状弾性板250はシリコーンゴムに限らず、ゴム状弾性を有する他の各種材質であっても良く、例えばイソプレンゴム、エチレンプロピレンゴム、ブタジエンゴム、クロロプレンゴム、天然ゴム等の熱硬化性エラストマーや、スチレン系、エステル系、ウレタン系、オレフィン系、アミド系、ブタジエン系、エチレン−酢酸ビニル系、フッ素ゴム系、イソプレン系、塩素化ポリエチレン系等の熱可塑性エラストマー等を用いることができる。これらのゴム状弾性部材の内、シリコーンゴムや、スチレン系熱可塑性エラストマー、エステル系熱可塑性エラストマーは、反発弾性が優れ、高い耐久性を有するので好ましい。   The rubber-like elastic plate 250 is formed by forming a light-transmitting material, for example, silicone rubber (for example, thickness 200 μm) into a substantially rectangular plate shape having substantially the same outer dimensions as the front side plate member 210 and the back side plate member 230. In addition, a protruding pressing portion 251 is provided at a position facing each key top 310 described below on the surface opposite to the surface on which the front surface side plate member 210 and the rear surface side plate member 230 are attached. The rubber-like elastic plate 250 is not limited to silicone rubber, and may be other various materials having rubber-like elasticity, for example, thermosetting elastomers such as isoprene rubber, ethylene propylene rubber, butadiene rubber, chloroprene rubber, and natural rubber. Alternatively, thermoplastic elastomers such as styrene, ester, urethane, olefin, amide, butadiene, ethylene-vinyl acetate, fluororubber, isoprene, and chlorinated polyethylene can be used. Of these rubber-like elastic members, silicone rubber, styrene-based thermoplastic elastomer, and ester-based thermoplastic elastomer are preferable because they have excellent resilience and high durability.

裏面側板部材230の上面(表面側板部材210に対向する側の面)には、透明な第1接着層270が塗布によって設けられている。第1接着層270は少なくとも光硬化性樹脂(この実施形態では紫外線硬化性樹脂)を含む接着層であり、この接着層は、比較的粘度が高く(即ち固体状に近く)、同時に弱い粘着性(接着性)を有している。即ちこの接着層を構成する樹脂材は、少なくとも光硬化性樹脂に、熱硬化性樹脂又は熱可塑性樹脂を含んだものに、溶剤を混合した液状の樹脂材である。裏面側板部材230に第1接着層270を形成するには、まずスリット233を設けていない平板状の裏面側板部材230の一方の面全体に第1接着層270をスクリーン印刷等によって塗布して形成する。次にこの裏面側板部材230を例えば70〜80℃で加熱して溶剤を揮発させ、これによって樹脂材中の熱硬化性又は熱可塑性の樹脂成分を硬化させて樹脂材全体を半硬化状態(軟らかすぎない状態)、即ち比較的粘度が高く固体に近い状態とし、同時に前記粘性によって弱い粘着性(接着性)を有するようにする。そして裏面側板部材230と第1接着層270とを同時にプレス加工することによってスリット233を形成する。これによって図1に示す第1接着層270が形成されたスリット233付きの裏面側板部材230が完成する。樹脂材に混合する光硬化性樹脂としては、例えば光硬化性のアクリレート樹脂等を用いる。アクリレート樹脂には、エステルアクリレート、ウレタンアクリレート、エポキシアクリレート、メラミンアクリレート、アクリル樹脂アクリレート、不飽和ポリエステルアクリレート等がある。また前記樹脂材に混合する熱硬化性樹脂又は熱可塑性樹脂としては、例えばポリエステル樹脂を用いる。ポリエステル樹脂の中には熱硬化性樹脂と熱可塑性樹脂とがある。なお光硬化性の樹脂及び熱硬化性の樹脂及び熱可塑性の樹脂として、他の各種材質のものを用いても良い。また紫外線硬化性以外の各種光硬化性樹脂材を用いても良い。   A transparent first adhesive layer 270 is provided on the upper surface of the back surface side plate member 230 (the surface on the side facing the front surface side plate member 210) by coating. The first adhesive layer 270 is an adhesive layer containing at least a photocurable resin (in this embodiment, an ultraviolet curable resin), and this adhesive layer has a relatively high viscosity (that is, close to a solid state) and at the same time has a weak adhesiveness. (Adhesiveness). That is, the resin material constituting the adhesive layer is a liquid resin material in which a solvent is mixed with at least a photocurable resin containing a thermosetting resin or a thermoplastic resin. In order to form the first adhesive layer 270 on the back surface side plate member 230, first, the first adhesive layer 270 is formed by applying the first adhesive layer 270 to one whole surface of the flat plate-like back surface side plate member 230 without the slit 233 by screen printing or the like. To do. Next, the back side plate member 230 is heated at, for example, 70 to 80 ° C. to volatilize the solvent, thereby curing the thermosetting or thermoplastic resin component in the resin material, and the entire resin material is in a semi-cured state (soft In other words, it is in a state where the viscosity is relatively high and close to a solid, and at the same time, it has weak tackiness (adhesiveness) due to the viscosity. And the slit 233 is formed by pressing the back surface side board member 230 and the 1st contact bonding layer 270 simultaneously. As a result, the back side plate member 230 with the slit 233 in which the first adhesive layer 270 shown in FIG. 1 is formed is completed. As the photocurable resin mixed with the resin material, for example, a photocurable acrylate resin or the like is used. Examples of the acrylate resin include ester acrylate, urethane acrylate, epoxy acrylate, melamine acrylate, acrylic resin acrylate, and unsaturated polyester acrylate. Moreover, as a thermosetting resin or a thermoplastic resin mixed with the resin material, for example, a polyester resin is used. Among polyester resins, there are thermosetting resins and thermoplastic resins. In addition, you may use the thing of other various materials as a photocurable resin, a thermosetting resin, and a thermoplastic resin. Moreover, you may use various photocurable resin materials other than ultraviolet curable.

裏面側板部材230とゴム状弾性板250間を接着する第2接着層290は透明であり、溶剤を含まない光硬化性樹脂(この実施形態では紫外線硬化性樹脂)からなる接着剤によって構成されている。この第2接着層290は、各キートップ310となる部分(裏面側板部材230のキートップ本体部235に対向する部分)にスリット233と同一外形寸法の開口291を設けている。   The second adhesive layer 290 that bonds the back side plate member 230 and the rubber-like elastic plate 250 is transparent and is made of an adhesive made of a photocurable resin (in this embodiment, an ultraviolet curable resin) that does not contain a solvent. Yes. The second adhesive layer 290 is provided with openings 291 having the same outer dimensions as the slits 233 in the portions to be the key tops 310 (portions facing the key top main body 235 of the back side plate member 230).

次にキートップ板1−1の製造方法を説明する。図2はキートップ板1−1の製造方法説明図である。キートップ板1−1を製造するには、図2(a)に示すように、予め表面側板部材210の下面に印刷層213をスクリーン印刷等によって形成しておく。また裏面側板部材230の上面全体に上述のようにして第1接着層270を塗布しておく。そして裏面側板部材230と表面側板部材210とを第1接着層270を介して積層する。このとき第1接着層270は微粘着性を有するので、表面側板部材210と裏面側板部材230は弱く接着し、ずれが生じ難い。次に裏面側板部材230の下面に第2接着層290を塗布し、その下面側にゴム状弾性板250を当接する。なお第2接着層290を塗布するのは、ゴム状弾性板250側であっても良い。そして透光性を有するゴム状弾性板250側から光(この実施形態では紫外線)を照射すれば、第2接着層290と、透明な裏面側板部材230を通して第1接着層270とに光が照射され、第1,第2接着層270,290が同時に硬化する。これによって図2(b)に示すように、表面側板部材210と裏面側板部材230とゴム状弾性板250とが一体化され、本実施形態にかかるキートップ板1−1が完成する。   Next, a method for manufacturing the key top plate 1-1 will be described. FIG. 2 is an explanatory view of a manufacturing method of the key top plate 1-1. In order to manufacture the key top plate 1-1, as shown in FIG. 2A, a printing layer 213 is previously formed on the lower surface of the front side plate member 210 by screen printing or the like. Further, the first adhesive layer 270 is applied to the entire top surface of the back side plate member 230 as described above. Then, the back surface side plate member 230 and the front surface side plate member 210 are laminated via the first adhesive layer 270. At this time, since the first adhesive layer 270 has slight adhesiveness, the front surface side plate member 210 and the back surface side plate member 230 are weakly bonded and are not easily displaced. Next, the 2nd adhesive layer 290 is apply | coated to the lower surface of the back surface side board member 230, and the rubber-like elastic board 250 is contact | abutted on the lower surface side. The second adhesive layer 290 may be applied on the rubber elastic plate 250 side. Then, if light (ultraviolet rays in this embodiment) is irradiated from the translucent rubber-like elastic plate 250 side, the second adhesive layer 290 and the first adhesive layer 270 are irradiated through the transparent back side plate member 230. Then, the first and second adhesive layers 270 and 290 are simultaneously cured. As a result, as shown in FIG. 2B, the front side plate member 210, the back side plate member 230, and the rubber-like elastic plate 250 are integrated, and the key top plate 1-1 according to the present embodiment is completed.

上記キートップ板1−1において、図2(b)に示すように、裏面側板部材230の各キートップ本体部235と、表面側板部材210及びゴム状弾性板250の各キートップ本体部235に対向する積層部分とによって各キートップ310が構成されている。即ちキートップ板1−1は、下記するスイッチ接点431を押圧するキートップ310を複数設置しており、合成樹脂フイルム211からなる表面側板部材210と、合成樹脂フイルム231からなる裏面側板部材230と、ゴム状弾性板250とを、この順番で第1,第2接着層270,290を介して一体に貼り合わせて構成され、第1接着層270を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成し、第2接着層290を光硬化性樹脂からなる接着層で構成している。   In the key top plate 1-1, as shown in FIG. 2B, the key top main body portions 235 of the back surface side plate member 230 and the key top main body portions 235 of the front surface side plate member 210 and the rubber elastic plate 250 are arranged. Each key top 310 is constituted by the opposite laminated portions. That is, the key top plate 1-1 is provided with a plurality of key tops 310 that press a switch contact 431 described below, and a front side plate member 210 made of a synthetic resin film 211 and a back side plate member 230 made of a synthetic resin film 231. The rubber-like elastic plate 250 is integrally bonded via the first and second adhesive layers 270 and 290 in this order, and the first adhesive layer 270 is bonded to the photo-curable resin by a thermosetting resin or a heat-resistant resin. An adhesive layer containing a plastic resin is used, and the second adhesive layer 290 is an adhesive layer made of a photocurable resin.

図3は上記キートップ板1−1を用いて組み立てられる携帯機器(この実施形態では携帯電話機)400の要部(キー入力部)の概略断面図である。この携帯機器400を組み立てるには、まず図3に示すケース410の収納部411内に各キートップ310によって押圧操作されるスイッチ接点431を設けたスイッチ基板430及びその他の図示しない各種部品を収納する。次に前記キートップ板1−1をケース410上に設置し、ケース410の外周を囲む側壁上面413に接着層415によってキートップ板1−1の外周下面を接着する。これによってキートップ板1−1の各押圧部251はスイッチ基板430の各スイッチ接点431上に位置する。各スイッチ接点431はその上部に設置した反転板431aを押圧してこれを反転することでそのスイッチ接点431がオンする構造となっている。従って何れかのキートップ310を表面側板部材210の上から押圧すれば、そのキートップ310が下降してその押圧部251が反転板431aを反転し、そのスイッチ接点431がオンする。   FIG. 3 is a schematic sectional view of a main part (key input part) of a portable device (a mobile phone in this embodiment) 400 assembled using the key top plate 1-1. In order to assemble the portable device 400, first, the switch board 430 provided with the switch contacts 431 to be pressed by the key tops 310 and other various parts (not shown) are housed in the housing portion 411 of the case 410 shown in FIG. . Next, the key top plate 1-1 is placed on the case 410, and the outer peripheral lower surface of the key top plate 1-1 is adhered to the side wall upper surface 413 surrounding the outer periphery of the case 410 by the adhesive layer 415. Accordingly, each pressing portion 251 of the key top plate 1-1 is positioned on each switch contact 431 of the switch board 430. Each switch contact 431 has a structure in which the switch contact 431 is turned on by pressing and reversing the reversal plate 431a installed on the top thereof. Therefore, when any key top 310 is pressed from the top side plate member 210, the key top 310 is lowered, the pressing portion 251 reverses the reverse plate 431a, and the switch contact 431 is turned on.

ところで本実施形態によれば、合成樹脂フイルム211製の表面側板部材210と合成樹脂フイルム231製の裏面側板部材230とゴム状弾性板250とを貼り合わせてキートップ板1−1としたので、その厚みを薄く構成でき、また容易にその表面を平面状にすることができる。また表面側板部材210と裏面側板部材230とゴム状弾性板250とからなるキートップ310なので、その硬度が増して押圧感触を適度に硬くすることができて良好な押圧感触を得ることができる。   By the way, according to the present embodiment, the front side plate member 210 made of the synthetic resin film 211, the back side plate member 230 made of the synthetic resin film 231 and the rubber-like elastic plate 250 are bonded together to form the key top plate 1-1. The thickness can be reduced, and the surface can be easily made flat. In addition, since the key top 310 is composed of the front side plate member 210, the back side plate member 230, and the rubber-like elastic plate 250, the hardness thereof can be increased and the pressing feeling can be appropriately hardened, and a good pressing feeling can be obtained.

またこの実施形態によれば、第1接着層270を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成し、第2接着層290を光硬化性樹脂からなる接着層で構成したので、このキートップ板1−1を製造する際に、積層する表面側板部材210と裏面側板部材230とゴム状弾性板250とを加熱・加圧することなく、しかも精度良く、強い強度の接着力によってこれら各部材を一体化できる。なお一般の加熱の必要ない常温感圧接着材の場合、その接着力が非常に弱い。一方高温・高圧プレス型感圧接着材の場合、接着強度は強いが、高温に弱い材質の合成樹脂フイルムからなる表面側板部材210や裏面側板部材230には使用できない。これに対してこの実施形態によれば、上述のように第1,第2接着層270,290の硬化時に加熱・加圧する必要がないので、表面側板部材210や裏面側板部材230として熱に弱いが安価なPETフイルム等の合成樹脂フイルムを用いることができる。   Further, according to this embodiment, the first adhesive layer 270 is constituted by an adhesive layer containing a thermosetting resin or a thermoplastic resin in a photocurable resin, and the second adhesive layer 290 is an adhesive layer made of a photocurable resin. Therefore, when the key top plate 1-1 is manufactured, the front side plate member 210, the back side plate member 230, and the rubber elastic plate 250 to be laminated are not heated / pressurized, and have high accuracy and strong strength. These members can be integrated by the adhesive force. In the case of a normal temperature pressure-sensitive adhesive that does not require heating, its adhesive strength is very weak. On the other hand, in the case of a high-temperature / high-pressure press-type pressure-sensitive adhesive, the adhesive strength is strong, but it cannot be used for the front side plate member 210 or the back side plate member 230 made of a synthetic resin film that is weak at high temperatures. On the other hand, according to this embodiment, since it is not necessary to heat and pressurize when the first and second adhesive layers 270 and 290 are cured as described above, the front side plate member 210 and the back side plate member 230 are vulnerable to heat. However, a synthetic resin film such as an inexpensive PET film can be used.

特に第1接着層270を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成したので、この接着層には微粘着性があり、従って表面側板部材210と裏面側板部材230との接着時に貼り直し等ができて両者の接着精度を容易に高めることができ、また予め表面側板部材210と裏面側板部材230とを第1接着層270によって接着(光は照射しない)しておいてそのまま半完成品として保管しておくこともでき、また表面側板部材210と裏面側板部材230とが接着後にずれることがないのでこれらを容易にゴム状弾性板250に精度良く接着することができる。またゴム状弾性板250との接着には光硬化性樹脂からなる第2接着層290を用いるので、積層の際の粘着性は低く、容易且つ精度良くゴム状弾性板250に積層でき、その後光を照射することで第1,第2接着層270,290を容易且つ強固に硬化させて各部材を一体化することができる。   In particular, since the first adhesive layer 270 is composed of a photocurable resin and an adhesive layer containing a thermosetting resin or a thermoplastic resin, the adhesive layer has slight adhesiveness, and therefore the front side plate member 210 and the back side plate member. 230 can be re-attached at the time of bonding to 230, and the bonding accuracy of both can be easily increased, and the front-side plate member 210 and the back-side plate member 230 are bonded in advance (no light is irradiated) by the first bonding layer 270. It can be stored as a semi-finished product as it is, and the front side plate member 210 and the back side plate member 230 do not shift after bonding, so that they are easily bonded to the rubber elastic plate 250 with high accuracy. Can do. In addition, since the second adhesive layer 290 made of a photocurable resin is used for adhesion to the rubber elastic plate 250, the adhesion at the time of lamination is low, and it can be laminated on the rubber elastic plate 250 easily and accurately. , The first and second adhesive layers 270 and 290 can be easily and firmly cured to integrate the members.

また裏面側板部材230にキートップ310の周囲を囲むスリット233を設けたので、表面側板部材210と裏面側板部材230とゴム状弾性板250とを貼り合わせることでその柔軟性が小さくなったキートップ板1−1の各キートップ310を容易に押圧することができ、同時にスリット233によって区画された表面側板部材210と裏面側板部材230とゴム状弾性板250とからなるキートップ310の硬度が増して押圧感触を適度に硬くできて良好な押圧感触が得られる。なお第1接着層270を裏面側板部材230に形成した後にスリット233を形成したので、予めスリット233を形成した裏面側板部材230に第1接着層270を後から印刷等によって形成する場合に比べ、第1接着層270がスリット233を形成した部分付近で不均一な厚みとならず、表面側板部材210との接着を確実に行うことが可能となる。即ち一般的には裏面側板部材230にスリット233を形成した後に第1接着層270を塗布するが、そうするとスリット233周囲の部分に塗布される第1接着層270の厚みにばらつきが生じ易くになり、表面側板部材210との接着強度が不均一になり、最悪の場合、剥がれが生じる恐れがある。これに対して本実施形態によれば、予め均一に第1接着層270を塗布できるので、このような問題は生じない。   Further, since the slit 233 surrounding the key top 310 is provided in the back side plate member 230, the key top whose flexibility is reduced by bonding the front side plate member 210, the back side plate member 230, and the rubber elastic plate 250 together. Each key top 310 of the plate 1-1 can be easily pressed, and at the same time, the hardness of the key top 310 formed by the front side plate member 210, the back side plate member 230, and the rubber-like elastic plate 250 defined by the slits 233 is increased. Thus, the pressing feeling can be made moderately hard and a good pressing feeling can be obtained. Since the slit 233 is formed after the first adhesive layer 270 is formed on the back surface side plate member 230, compared to the case where the first adhesive layer 270 is formed on the back surface side plate member 230 on which the slit 233 has been formed in advance by printing or the like. The first adhesive layer 270 does not have a non-uniform thickness in the vicinity of the portion where the slit 233 is formed, and it is possible to reliably adhere to the surface side plate member 210. That is, generally, the first adhesive layer 270 is applied after the slit 233 is formed on the back side plate member 230. However, in this case, the thickness of the first adhesive layer 270 applied around the slit 233 tends to vary. The adhesive strength with the surface side plate member 210 becomes non-uniform, and in the worst case, there is a risk of peeling. On the other hand, according to this embodiment, since the 1st contact bonding layer 270 can be apply | coated uniformly previously, such a problem does not arise.

図4,図5は本発明の参考例にかかるキートップ板1−2の分解斜視図であり、図4は上側から見た分解斜視図、図5は下側から見た分解斜視図である。両図に示すようにキートップ板1−2は、合成樹脂フイルムからなる表面側板部材10と、合成樹脂フイルムからなる裏面側板部材30とを、接着層50を介して一体に貼り合わせて構成されている。   4 and 5 are exploded perspective views of the key top plate 1-2 according to the reference example of the present invention, FIG. 4 is an exploded perspective view seen from the upper side, and FIG. 5 is an exploded perspective view seen from the lower side. . As shown in both figures, the key top plate 1-2 is configured by integrally bonding a front side plate member 10 made of a synthetic resin film and a back side plate member 30 made of a synthetic resin film via an adhesive layer 50. ing.

表面側板部材10は可撓性を有する合成樹脂フイルム11を矩形状に形成し、その下面(裏面側板部材30に対向する側の面)に所望の印刷層13を形成して構成されている。この参考例においては合成樹脂フイルム11としてPETフイルムを用いている。合成樹脂フイルム11は透明であってその厚みは50μm程度である。なお合成樹脂フイルム11の材質としてはPETフイルムに限らず、可撓性のある他の各種合成樹脂フイルム(熱可塑性でも熱硬化性でも光硬化性でも良い)であれば良く、例えばPPSフイルム、PIフィルム、PENフイルム、PEIフイルム、PEEKフイルム、PEKフイルム、PCフイルム、PBNフイルム、PBTフイルム等を用いても良い。   The front surface side plate member 10 is formed by forming a flexible synthetic resin film 11 in a rectangular shape and forming a desired printing layer 13 on the lower surface (the surface on the side facing the back surface side plate member 30). In this reference example, a PET film is used as the synthetic resin film 11. The synthetic resin film 11 is transparent and has a thickness of about 50 μm. The material of the synthetic resin film 11 is not limited to a PET film, but may be any other flexible synthetic resin film (which may be thermoplastic, thermosetting, or photocurable), such as PPS film, PI. A film, a PEN film, a PEI film, a PEEK film, a PEK film, a PC film, a PBN film, a PBT film, or the like may be used.

印刷層13は印刷(スクリーン印刷等)やその他の各種手段(蒸着等)によって形成されている。図4,5では印刷層13は各キートップ40(図7参照)となる部分のみに形成されているが、例えば遮光性を有する印刷層を合成樹脂フイルム11の下面全体に形成して所定の位置(例えばキートップ40となる部分)に抜き文字状の透光部を設けてもよい。またその透光部を覆うように透光性を有する別の印刷層を積層しても良い。   The print layer 13 is formed by printing (screen printing or the like) or other various means (evaporation or the like). 4 and 5, the printing layer 13 is formed only on the portion that becomes each key top 40 (see FIG. 7). For example, a printing layer having a light shielding property is formed on the entire lower surface of the synthetic resin film 11 to obtain a predetermined layer. A character-shaped translucent portion may be provided at a position (for example, a portion to be the key top 40). Moreover, you may laminate | stack another printing layer which has translucency so that the translucent part may be covered.

裏面側板部材30は可撓性を有する合成樹脂フイルム31を矩形状(合成樹脂フイルム11と同一外形寸法)に形成し、各キートップ40となる部分の周囲を囲む切り欠きからなるスリット33を設けて構成されている。この参考例においては合成樹脂フイルム31としてPETフイルムを用いている。合成樹脂フイルム31は透明であってその厚みは250μm程度である。つまり裏面側板部材30の厚みは表面側板部材10の厚みよりも厚く形成している。なお合成樹脂フイルム31の材質は上記合成樹脂フイルム11と同様に、PETフイルムに限らず、可撓性のある他の各種合成樹脂フイルム(熱可塑性でも熱硬化性でも光硬化性でも良い)であれば良く、例えばPPSフイルム、PIフィルム、PENフイルム、PEIフイルム、PEEKフイルム、PEKフイルム、PCフイルム、PBNフイルム、PBTフイルム等を用いても良い。   The back-side plate member 30 is formed of a flexible synthetic resin film 31 in a rectangular shape (the same outer dimensions as the synthetic resin film 11), and provided with slits 33 formed by notches surrounding the portions to be the key tops 40. Configured. In this reference example, a PET film is used as the synthetic resin film 31. The synthetic resin film 31 is transparent and has a thickness of about 250 μm. That is, the thickness of the back surface side plate member 30 is formed to be greater than the thickness of the front surface side plate member 10. The material of the synthetic resin film 31 is not limited to the PET film as in the case of the synthetic resin film 11, but may be any other flexible synthetic resin film (which may be thermoplastic, thermosetting, or photocurable). For example, a PPS film, a PI film, a PEN film, a PEI film, a PEEK film, a PEK film, a PC film, a PBN film, a PBT film, or the like may be used.

スリット33は各キートップ40となる部分の周囲を囲むように略矩形のC字状の切り欠きによって形成されており、裏面側板部材30を上下に貫通するように形成されている。裏面側板部材30のスリット33によって囲まれる部分はキートップ本体部35となっている。キートップ本体部35はその周囲をスリット33によって囲むことでスリット33の外側の部分と連結部(ヒンジ部)37を介して連結されている。キートップ本体部35の下面(表面側板部材10に対向する面の反対側の面)の略中央には小突起状に突出する押圧部39が設けられている。押圧部39は光硬化型樹脂(この実施形態では紫外線硬化型樹脂)によって形成されている。   The slit 33 is formed by a substantially rectangular C-shaped notch so as to surround the periphery of each key top 40, and is formed so as to penetrate the back side plate member 30 up and down. A portion surrounded by the slit 33 of the back side plate member 30 is a key top main body portion 35. The key top main body 35 is connected to the outer portion of the slit 33 through a connecting portion (hinge portion) 37 by surrounding the periphery thereof with the slit 33. A pressing portion 39 that protrudes in the form of a small protrusion is provided at the approximate center of the lower surface of the key top main body 35 (the surface opposite to the surface facing the front surface side plate member 10). The pressing portion 39 is made of a photocurable resin (in this embodiment, an ultraviolet curable resin).

裏面側板部材30の上面(表面側板部材10に対向する側の面)には、透明な接着層50が塗布によって設けられている。接着層50は光硬化型(この実施形態では紫外線硬化型)の接着剤によって形成されている。   On the upper surface of the back surface side plate member 30 (the surface on the side facing the front surface side plate member 10), a transparent adhesive layer 50 is provided by coating. The adhesive layer 50 is formed of a photo-curing type (ultraviolet curing type in this embodiment) adhesive.

次にこのキートップ板1−2の製造方法を説明する。図6はキートップ板1−2の製造方法説明図である。キートップ板1−2を製造するには、図6(a)に示すように、予め表面側板部材10の下面に印刷層13をスクリーン印刷等によって形成しておく。一方裏面側板部材30の各キートップ本体部35の下面に光硬化型の樹脂を印刷やポッティング等によって塗布し、これに光(紫外線)を照射して硬化させることにより小突起状の押圧部39を形成する。   Next, a method for manufacturing the key top plate 1-2 will be described. FIG. 6 is an explanatory view of a manufacturing method of the key top plate 1-2. In order to manufacture the key top plate 1-2, as shown in FIG. 6A, the printing layer 13 is previously formed on the lower surface of the front side plate member 10 by screen printing or the like. On the other hand, a light-curing resin is applied to the lower surface of each keytop main body portion 35 of the back side plate member 30 by printing, potting or the like, and is irradiated with light (ultraviolet rays) to be cured, thereby pressing the small protrusion-shaped pressing portions 39. Form.

そして裏面側板部材30の上面全体に接着層50を塗布する。次に図6(b)に示すように裏面側板部材30の上面に接着層50を介して表面側板部材10を積層する。そして透明な裏面側板部材30側から光(紫外線)を照射し、これによって接着層50を硬化すれば、表面側板部材10と裏面側板部材30とが一体化され、本参考例にかかるキートップ板1−2が完成する。   Then, the adhesive layer 50 is applied to the entire upper surface of the back side plate member 30. Next, as shown in FIG. 6B, the front surface side plate member 10 is laminated on the upper surface of the back surface side plate member 30 via the adhesive layer 50. Then, if light (ultraviolet rays) is irradiated from the transparent back side plate member 30 side and thereby the adhesive layer 50 is cured, the front side plate member 10 and the back side plate member 30 are integrated, and the key top plate according to this reference example. 1-2 is completed.

上記キートップ板1−2において、図6(b)に示すように、裏面側板部材30の各キートップ本体部35と、表面側板部材10のキートップ本体部35に対向する積層接着部分とによって各キートップ40が構成されている。即ちキートップ板1−2は、下記するスイッチ接点131を押圧するキートップ40を複数設置しており、合成樹脂フイルム11からなる表面側板部材10と、合成樹脂フイルム31からなる裏面側板部材30とを、接着層50を介して一体に貼り合わせて構成され、裏面側板部材30にキートップ40の周囲を切り欠くスリット33を設けて構成されている。またこの実施形態では裏面側板部材30の厚みを表面側板部材10の厚みよりも厚く構成している。   In the key top plate 1-2, as shown in FIG. 6B, each key top main body portion 35 of the back surface side plate member 30 and a laminated adhesive portion facing the key top main body portion 35 of the front surface side plate member 10 are used. Each key top 40 is configured. That is, the key top plate 1-2 is provided with a plurality of key tops 40 that press the switch contacts 131 described below, and the front side plate member 10 made of the synthetic resin film 11 and the back side plate member 30 made of the synthetic resin film 31. Are bonded together via an adhesive layer 50, and the rear surface side plate member 30 is provided with a slit 33 that cuts out the periphery of the key top 40. Moreover, in this embodiment, the thickness of the back surface side plate member 30 is configured to be thicker than the thickness of the front surface side plate member 10.

図7は上記キートップ板1−2を用いて組み立てられる携帯機器(この実施形態では携帯電話機)100の要部(キー入力部)の概略断面図である。この携帯機器100を組み立てるには、まず図7に示すケース110の収納部111内に各キートップ40によって押圧操作されるスイッチ接点131を設けたスイッチ基板130及びその他の図示しない各種部品を収納する。次に前記キートップ板1−2をケース110上に設置し、ケース110の外周を囲む側壁上面113に接着層115によってキートップ板1−2の外周下面を接着する。これによってキートップ板1−2の各押圧部39はスイッチ基板130の各スイッチ接点131上に位置する。各スイッチ接点131はその上部に設置した反転板131aを押圧してこれを反転することでそのスイッチ接点131がオンする構造となっている。従って何れかのキートップ40を表面側板部材10の上から押圧すれば、そのキートップ40が下降してその押圧部39が反転板131aを反転し、そのスイッチ接点131がオンする。なおスイッチ基板130上に発光素子を設置しておいてこれを発光すれば、キートップ板1−2をその下面側から照光することができる(この点、上記本願実施形態においても同様である)。   FIG. 7 is a schematic cross-sectional view of a main part (key input part) of a portable device (mobile phone in this embodiment) 100 assembled using the key top plate 1-2. In order to assemble the portable device 100, first, the switch board 130 provided with the switch contacts 131 pressed by the key tops 40 and other various parts (not shown) are stored in the storage part 111 of the case 110 shown in FIG. . Next, the key top plate 1-2 is installed on the case 110, and the outer peripheral lower surface of the key top plate 1-2 is bonded to the side wall upper surface 113 surrounding the outer periphery of the case 110 by the adhesive layer 115. Accordingly, each pressing portion 39 of the key top plate 1-2 is positioned on each switch contact 131 of the switch board 130. Each switch contact 131 has a structure in which the switch contact 131 is turned on by pressing the reverse plate 131a installed on the switch contact 131 and inverting it. Therefore, when any key top 40 is pressed from the top side plate member 10, the key top 40 is lowered, the pressing portion 39 reverses the reverse plate 131a, and the switch contact 131 is turned on. If a light emitting element is installed on the switch substrate 130 and emits light, the key top plate 1-2 can be illuminated from the lower surface side (this is also the case in the above-described embodiment). .

ところで本参考例によれば、合成樹脂フイルム11製の表面側板部材10と合成樹脂フイルム31製の裏面側板部材30とを接着層50を介して貼り合わせてキートップ板1−2としているので、その厚みを薄く構成でき、また合成樹脂フイルム11,31の貼り合わせなので成形金型等が不要で製造が容易で低コスト化が図れる。また容易にその表面を平面状にすることができる。さらに裏面側板部材30にスリット33を設けたので、表面側板部材10と裏面側板部材30を貼り合わせることでその柔軟性が小さくなったキートップ板1−2の各キートップ40の押圧を容易に行うことができ、同時にスリット33によって区画された表面側板部材10と裏面側板部材30とからなるキートップ40の硬度を適度に硬くできて良好な押圧感触を得ることができる。またキートップ板1−2は、合成樹脂フイルム製の表面側板部材10に印刷等によって容易に多色印刷を行うことができ、その装飾を良好なものとすることができる(前記キートップ板1−1においても同様)。またこの参考例の場合、裏面側板部材30の厚みを表面側板部材10の厚みよりも厚くすることでキートップ40の硬度を容易に増加・調整することができ、キートップ40の押圧感触をさらに硬くできて良好なものとすることができる(前記キートップ板1−1においても裏面側板部材230の厚みの方を表面側板部材210の厚みより厚くしても良い)。   By the way, according to this reference example, the front side plate member 10 made of the synthetic resin film 11 and the back side plate member 30 made of the synthetic resin film 31 are bonded together via the adhesive layer 50 to form the key top plate 1-2. The thickness can be reduced, and since the synthetic resin films 11 and 31 are bonded together, a molding die or the like is not required, and manufacturing is easy and cost reduction can be achieved. Moreover, the surface can be easily planarized. Furthermore, since the slit 33 is provided in the back surface side plate member 30, pressing the key tops 40 of the key top plate 1-2 whose flexibility has been reduced by bonding the front surface side plate member 10 and the back surface side plate member 30 is facilitated. At the same time, the hardness of the key top 40 composed of the front surface side plate member 10 and the rear surface side plate member 30 partitioned by the slit 33 can be appropriately increased, and a good pressing feeling can be obtained. The key top plate 1-2 can easily perform multicolor printing on the surface side plate member 10 made of a synthetic resin film by printing or the like, and the decoration can be improved (the key top plate 1). The same applies to -1. In the case of this reference example, the hardness of the key top 40 can be easily increased / adjusted by making the thickness of the back surface side plate member 30 thicker than the thickness of the front surface side plate member 10, further increasing the pressing feel of the key top 40. It can be made hard and good (the key-top plate 1-1 can also have the back side plate member 230 thicker than the front side plate member 210).

以上本発明の実施形態を説明したが、本発明は上記実施形態に限定されるものではなく、特許請求の範囲、及び明細書と図面に記載された技術的思想の範囲内において種々の変形が可能である。なお直接明細書及び図面に記載のない何れの形状・構造・材質であっても、本願発明の作用・効果を奏する以上、本願発明の技術的思想の範囲内である。例えばスイッチ接点は反転板を設置しない構造のスイッチ接点でも良い。またスリットの形状も、各種変形が可能であり、コ字型やその他の各種形状であっても良い。また印刷層213を形成するのは合成樹脂フイルム211の下面に限らず、合成樹脂フイルム211の上面でも良く、また合成樹脂フイルム231の上面又は下面でも良い。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the technical idea described in the claims and the specification and drawings. Is possible. It should be noted that any shape, structure, and material not directly described in the specification and drawings are within the scope of the technical idea of the present invention as long as the effects and advantages of the present invention are exhibited. For example, the switch contact may be a switch contact having a structure in which a reverse plate is not installed. Also, the shape of the slit can be variously modified and may be a U shape or other various shapes. The printed layer 213 is not limited to the lower surface of the synthetic resin film 211, but may be the upper surface of the synthetic resin film 211, or the upper surface or the lower surface of the synthetic resin film 231.

キートップ板1−1の分解斜視図である。It is a disassembled perspective view of the key top board 1-1. キートップ板1−1の製造方法説明図である。It is manufacturing method explanatory drawing of the keytop board 1-1. 携帯機器400の要部概略断面図である。3 is a schematic cross-sectional view of a main part of a mobile device 400. キートップ板1−2を上側から見た分解斜視図である。It is the disassembled perspective view which looked at the keytop board 1-2 from the upper side. キートップ板1−2を下側から見た分解斜視図である。It is the disassembled perspective view which looked at the keytop board 1-2 from the lower side. キートップ板1−2の製造方法説明図である。It is manufacturing method explanatory drawing of the keytop board 1-2. 携帯機器100の要部概略断面図である。1 is a schematic cross-sectional view of a main part of a mobile device 100. FIG.

符号の説明Explanation of symbols

1−1 キートップ板
210 表面側板部材
211 合成樹脂フイルム
213 印刷層
230 裏面側板部材
231 合成樹脂フイルム
233 スリット
235 キートップ本体部
250 ゴム状弾性板
251 押圧部
270 第1接着層
290 第2接着層
310 キートップ
431 スイッチ接点
1-1 Key Top Plate 210 Front Side Plate Member 211 Synthetic Resin Film 213 Printing Layer 230 Back Side Side Plate Member 231 Synthetic Resin Film 233 Slit 235 Key Top Main Body 250 Rubber Elastic Plate 251 Pressing Part 270 First Adhesive Layer 290 Second Adhesive Layer 310 Key top 431 Switch contact

Claims (4)

スイッチ接点を押圧するキートップを複数設置してなるキートップ板において、
前記キートップ板は、合成樹脂フイルムからなる表面側板部材と、合成樹脂フイルムからなる裏面側板部材と、ゴム状弾性板とを、この順番に第1,第2接着層を介して一体に貼り合わせて構成され、
前記第1接着層を光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含んだ接着層で構成し、前記第2接着層を光硬化性樹脂からなる接着層で構成したことを特徴とするキートップ板。
In the key top plate that has multiple key tops that press the switch contacts,
The key top plate is formed by integrally bonding a front side plate member made of a synthetic resin film, a back side plate member made of a synthetic resin film, and a rubber-like elastic plate in this order via first and second adhesive layers. Configured
The first adhesive layer is composed of an adhesive layer containing a thermosetting resin or a thermoplastic resin in a photocurable resin, and the second adhesive layer is composed of an adhesive layer made of a photocurable resin. Key top plate.
請求項1に記載のキートップ板の製造方法において、
前記表面側板部材と裏面側板部材とゴム状弾性板とを用意し、
表面側板部材と裏面側板部材とを、光硬化性樹脂に熱硬化性樹脂又は熱可塑性樹脂を含ませることで光を照射する前に微粘着性を有する第1接着層によって接着する第1接着工程と、
前記裏面側板部材とゴム状弾性板とを、光硬化性樹脂からなる第2接着層によって接着する第2接着工程と、
前記第1,第2接着層に同時に光を照射することでこれら第1,第2接着層を硬化する接着層硬化工程と、を有することを特徴とするキートップ板の製造方法。
In the manufacturing method of the keytop board according to claim 1,
Prepare the front side plate member, the back side plate member and the rubber-like elastic plate,
The 1st adhesion process which adhere | attaches a surface side board member and a back surface side board member by the 1st contact bonding layer which has slight adhesiveness before irradiating light by including a thermosetting resin or a thermoplastic resin in a photocurable resin. When,
A second bonding step of bonding the back side plate member and the rubber-like elastic plate with a second adhesive layer made of a photocurable resin;
An adhesive layer curing step of curing the first and second adhesive layers by simultaneously irradiating the first and second adhesive layers with light.
前記表面側板部材と裏面側板部材の内の少なくとも一方を、ポリエチレンテレフタレートフイルムで構成したことを特徴とする請求項2に記載のキートップ板の製造方法。   The method for producing a key top plate according to claim 2, wherein at least one of the front side plate member and the back side plate member is made of polyethylene terephthalate film. 前記第1接着工程は、前記裏面側板部材に前記第1接着層を形成した後に、この裏面側板部材と第1接着層とに前記キートップとなる部分の周囲を切り欠くスリットを形成し、その後第1接着層に前記表面側板部材を接着する接着工程であることを特徴とする請求項2又は3に記載のキートップ板の製造方法。   In the first bonding step, after the first adhesive layer is formed on the back surface side plate member, a slit is formed in the back surface side plate member and the first adhesive layer by cutting out the periphery of the portion serving as the key top. The method for manufacturing a key top plate according to claim 2 or 3, wherein the front side plate member is bonded to the first adhesive layer.
JP2007071941A 2007-03-20 2007-03-20 Key top plate Pending JP2008234961A (en)

Priority Applications (1)

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ID=39907536

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010146849A (en) * 2008-12-18 2010-07-01 Shin Etsu Polymer Co Ltd Member for push-button switch, key panel, and electronic equipment
JP2010218996A (en) * 2009-03-19 2010-09-30 Alps Electric Co Ltd Keyboard device having illumination function
JP2012256520A (en) * 2011-06-09 2012-12-27 Shin Etsu Polymer Co Ltd Waterproof switch member and electronic equipment provided with the same
WO2015064033A1 (en) * 2013-10-30 2015-05-07 株式会社デンソー Portable wireless key

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2010146849A (en) * 2008-12-18 2010-07-01 Shin Etsu Polymer Co Ltd Member for push-button switch, key panel, and electronic equipment
JP2010218996A (en) * 2009-03-19 2010-09-30 Alps Electric Co Ltd Keyboard device having illumination function
JP2012256520A (en) * 2011-06-09 2012-12-27 Shin Etsu Polymer Co Ltd Waterproof switch member and electronic equipment provided with the same
WO2015064033A1 (en) * 2013-10-30 2015-05-07 株式会社デンソー Portable wireless key
JP2015086569A (en) * 2013-10-30 2015-05-07 株式会社デンソー Portable wireless key
US9894794B2 (en) 2013-10-30 2018-02-13 Denso Corporation Portable wireless key

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