JP2670016B2 - Rubber switch member - Google Patents
Rubber switch memberInfo
- Publication number
- JP2670016B2 JP2670016B2 JP6136902A JP13690294A JP2670016B2 JP 2670016 B2 JP2670016 B2 JP 2670016B2 JP 6136902 A JP6136902 A JP 6136902A JP 13690294 A JP13690294 A JP 13690294A JP 2670016 B2 JP2670016 B2 JP 2670016B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- rubber
- transparent
- coating
- coating film
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Push-Button Switches (AREA)
Description
【発明の詳細な説明】
【０００１】
【産業上の利用分野】本発明はゴム製スイッチ用部材、
特にはキートップ部に光透過部を有する照光スイッチ、
例えば、車載用電話機、車載用の各種押釦スイッチまた
は暗所用押釦スイッチなどに組み込まれるゴム製スイッ
チ用部材に関するものである。
【０００２】
【従来の技術】近年、押釦スイッチの押釦部にはキート
ップ部、ドーム部及びベース部からなるゴム製スイッチ
用部材（以下単にスイッチ用部材と称する）が多用され
ており、このものは外装が優れていること、また多数の
キートップ部が一体成形されていることから、各種産業
用機器における入力用として広く利用されている。しか
して、この種のスイッチ用部材については、押釦スイッ
チが確実に押されたかどうかを確認するために、また暗
い場所での操作性をあげるために、その一部に透明また
は半透明の光透過部を窓状に設けると共にその各背面に
光源をそれぞれ置いて照光する照光式のものが増加して
きている。
【０００３】
【発明が解決しようとする課題】しかし、この照光式の
ものは、その製造にあたって通常着色されたゴム部分と
透明なゴム部分とを別々に成形し、これらを所定の部位
で透光部が窓状になるように接着するか、あるいは着色
されたゴム部分と透明ゴム部分のいずれか一方を成形し
たのち、これを金型などに仕込んで他方のゴムと一体成
形して窓状の透光部を設けるという方法で行なわれてい
るため、前者の方法では２種類の金型が必要であるし、
この接着工程は歩留りがわるくて得られるスイッチ用部
材が高価になるばかりか、外観も位置ズレなどを起こし
て見苦しいものになるという不利があり、後者について
も２度の成形工程が必要で、金型も複雑なものとなるの
で高価になるし、熱履歴も複雑となり、耐久性も劣ると
いう欠点があり、これらの方法から得られるスイッチ用
部材はいずれの場合も比較的小さな細かい形状の透光部
分をもつものを得ることが難しいという不利もある。
【０００４】
【課題を解決するための手段】本発明はこのような不利
を解決した照光式のゴム製スイッチ用部材に関するもの
で、このスイッチ用部材は、透明もしくは半透明のゴム
材料からなりキートップ部、ドーム部及びベース部を有
するスイッチ用ゴム基材（以下単にゴム基材と称する）
と、この表面に設けられた透明または光が透過する程度
に薄く着色された、好ましくは塗料からなる透光性塗膜
と、前記ゴム基材及び透光性塗膜の表面を被覆して設け
られた遮光性着色塗膜と、前記透光性塗膜面上の遮光性
着色塗膜に設けられた、任意の文字または図形の形など
の符号状の抜き型透光部とからなっている。
【０００５】すなわち、本発明者らは安価で、かつ高品
質な光透過部を有するスイッチ用部材について種々検討
した結果、金型中で加熱加圧という常法で形成されたゴ
ム基材のキートップ部側の表面に、まずこのゴム基材と
接着する透明または光が透過する程度に薄く着色した塗
料を部分的に配して、ゴム基材、特にはそのキートップ
上部に透明または光が透過する程度に薄く着色された透
光性塗膜を形成してから、ゴム基材と透光性塗膜の上
に、これらと接着する遮光性着色塗料を塗布、硬 化して
遮光性着色塗膜を設けたのち、この透光性塗膜上の遮光
性着色塗膜にレーザー光を任意の文字または図形の形で
照射すると、レーザー光の照射された部分の遮光性着色
塗膜が取り除かれて、ここに抜き型透光部が形成される
ことを見出した。
【０００６】この場合、遮光性着色塗膜の下には透明ま
たは光が透過する程度に透明または薄く着色した透光性
塗膜が存在し、レーザー加工に伴う熱が透明または半透
明のゴム基材にまで伝わらないので、必要深度以上に照
射部分が削られることはなく、比較的小さな細かい形状
の抜き型透光部とすることができ、また薄く着色した塗
料をスクリーン印刷などで多色印刷して各キートップ部
上に設けられた透光性塗膜の色を互いに異ならせれば、
複数のキートップ部各々の照光文字も多色のものとして
得ることができる。したがって、これによれば、容易
に、かつ安価にデザイン的にバリエーションに富んだ、
高品質の抜き型透光部を有するスイッチ用部材が得られ
ることを確認して本発明を完成させた。
【０００７】本発明で用いられるゴム基材自体は透明も
しくは半透明のゴム材料からなるものである限り公知の
方法で得られたものとすればよく、したがってこれはド
ーム部が逆椀状の弾性ゴムロッドとされたエラスティッ
ク性のものとされ、このものは天然ゴムまたはポリブタ
ジエン、ポリイソプレン、ＳＢＲ、ネオプレンなどのジ
エン系合成ゴム、エチレン−プロピレン系、ウレタン
系、シリコーン系などの合成ゴムあるいはこれらの組み
合せから作られたものとすればよいが、これは透光部分
が透明または半透明とされるので、透明性がよく、耐熱
性、耐候性、電気絶縁性にもすぐれているシリコーン系
ゴム製とすることがよい。
【０００８】また、このゴム基材は全体を絶縁性とした
もの、全体を導電性としたもののいずれであってもよい
が、通常は接点部を導電性とし、ドーム部を絶縁性とし
たものとされる。なお、これらは圧縮成形、射出成形、
トランスファー成形など公知の方法により成形されたも
のとすればよい。
【０００９】本発明のスイッチ用部材では、この従来公
知の方法で得られたゴム基材の、特にはキートップ部の
表面に、接着性をもつ透明または薄い着色した塗料で透
光性の塗膜もしくは層を形成し、さらにこの上に接着性
をもつ着色された塗料を塗布し、必要に応じて加熱して
硬化させ、遮光性着色塗膜を形成する。ここに使用され
る透明または薄い着色した塗料はゴム基材と接着する必
要があるので、このゴム基材がシリコーン系ゴムからな
る場合にはシリコーン系ゴムからなるものとすればよ
く、他種のものとする場合にはシリコーン系シーラン
ト、プライマーなどを塗布しておくことがよいが、これ
には例えば、特開昭58−8642号公報「シリコーン成形
体」に示される方法などを用いればよい。
【００１０】また最後に設けられる遮光性着色塗膜に用
いられる着色塗料は前述の透明または薄く着色した塗料
と基本的には同一のものでよい。遮光性着色塗膜はキー
トップ部面上のみの塗布ではなく、ドーム部、ベース部
を含めキートップ側全体に設ける。しかしながら、この
遮光性着色塗膜は透光性塗膜とは区別されるべきもので
あるから、遮光性の強いものとする必要があり、したが
って着色剤の混入で着色されたものとすればよい。な
お、透明もしくは薄い着色した透光性塗膜の厚さは５μ
ｍ〜20μｍとすればよく、また遮光性の強い遮光性着色
塗膜の厚さは20μｍ〜60μｍ程度とすればよい。
【００１１】このようにして作られた２層の塗膜を有す
るゴム基材に、所定の文字、図形などのパターンに抜き
文字されたマスクを介して、レーザー光、例えば炭酸ガ
スレーザー光を照射するか、あるいは細かく絞ったレー
ザー光を透光部としたいパターンに走査し照射するなど
して、遮光性着色塗膜に抜き型透光部を設ける。このよ
うなレーザー光を照射すると、レーザー光を照射した部
分の遮光性着色塗膜がきれいに除去されて、本発明のス
イッチ用部材が容易に得られる。
【００１２】つぎに本発明の一実施態様を示す添付の図
面にもとづいて説明する。図１は本発明のスイッチ用部
材Ａの縦断面図を示したものであり、このものはキート
ップ部２、ドーム部３、ベース部４、可動接点部５から
なるゴム基材１のキートップ部２の上に、透明もしくは
薄く着色された塗料で形成された透光性の塗膜８、この
塗膜８の上にゴム基材１とも接着する塗料とは異色の着
色塗料で形成された遮光性着色塗膜６がキートップ部
２、ドーム部３、ベース部４をも覆うように設けられて
いる。またレーザー光を照射して遮光性着色塗膜６を抜
きパターンとした部分は抜き型透光部７となっている。
【００１３】
【実施例】次に本発明の実施例をあげるが、例中の部は
重量部を示したものである。
実施例
シリコーンゴム・ＫＥ-951Ｕ［信越化学工業（株）製商
品名］ 100部にカーボンブラック40部を混合したものを
金型内で 180℃、 200kg/cm2で成形して直径４mm、厚さ
0.5mmの可動接点を作り、ついでこれを金型内に載置
し、ここにシリコーンゴム・ＫＥ-951Ｕ（前出） 100部
に加硫剤Ｃ−８［信越化学工業（株）製商品名］２部を
加えたシリコーンコンパウンドを充填し、 180℃、30kg
/cm2に加熱加圧して裏側に可動接点を有するキートップ
部が10個連接された形状の透明なゴム基材を成形した。
【００１４】ついでこのゴム基材のキートップ上部に淡
いブルーに着色されたシルマークブルー［信越化学工業
（株）製商品名］を厚さ20μｍにスクリーン印刷で塗布
し、200℃、30分間加熱固化させて透光性塗膜とした
後、さらにこの透光性塗膜面と、ゴム基材のキートップ
側のキートップ部、ドーム部、ベース部の全面とに、黒
色に着色された遮光性着色塗料であるシルマークブラッ
ク［同前］を厚さ60μｍの塗膜が得られるように塗布
し、 200℃で30分間加熱固化させて遮光性着色塗膜を形
成した。
【００１５】つぎにゴム基材のキートップ部の黒色の遮
光性着色塗膜上に０から９の形に抜かれたステンレスの
マスクを通して、４，５Ｊのエネルギーの炭酸ガスレー
ザーを照射し、キートップ部に０から９の数字状の抜き
型透光部を持つ本発明のスイ ッチ用部材が得られた。
【００１６】
【発明の効果】本発明のスイッチ用部材はゴム基材の表
面に透光性塗膜と遮光性着色塗膜と抜き型透光部を設け
たものであるが、この抜き型透光部は寸法精度がよく、
区画輪郭が明瞭となり、コントラストがはっきりしたも
のになるし、この透光性塗膜を多色印刷とすると照光文
字も多色のものとすることができるという有利性をもつ
ものとなる。Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rubber switch member,
In particular, an illumination switch that has a light transmission part in the key top part,
For example, the present invention relates to a rubber switch member incorporated in an in-vehicle telephone, various in-vehicle push button switches, dark place push button switches and the like. [0002] In recent years, the push button portion of the push button switch Quito
A rubber switch member (hereinafter simply referred to as a switch member) consisting of a cap portion, a dome portion and a base portion is often used. This one has an excellent exterior and a large number of key top portions are integrally molded. Therefore , it is widely used for input in various industrial equipment. However, for this type of switch member, in order to confirm whether the push button switch has been pressed firmly and to improve the operability in dark places, part of it is transparent or semi-transparent light transmission. Illumination type in which a portion is provided in a window shape and a light source is placed on each back surface thereof to illuminate is increasing. However, in the case of this illuminated type, the colored rubber portion and the transparent rubber portion are separately molded in the production thereof, and these are light-transmitted at a predetermined portion. The part is bonded so that it becomes a window shape, or either one of the colored rubber part and the transparent rubber part is molded, and then this is placed in a mold etc. and integrally molded with the other rubber to form a window-shaped part. The former method requires two types of molds because it is performed by providing a light-transmitting part.
This bonding process has a disadvantage that not only the cost of the yielding switch member is high, but also the appearance is misaligned and the appearance is unsightly. The latter molding process is also performed twice. Are required, the mold becomes complicated, so that it becomes expensive, the heat history becomes complicated, and the durability is deteriorated.Therefore, the switch member obtained by these methods is in any case. there is also the disadvantage that also it is difficult to obtain those having a relatively light transmitting portion <br/> amount of small fine shape. SUMMARY OF THE INVENTION The present invention relates to an illuminated rubber switch member which solves such disadvantages, and the switch member is made of a transparent or translucent rubber material and is a key. Has a top part, dome part, and base part
Switch rubber base material (hereinafter simply referred to as the rubber base material)
When a transparent or light provided on the surface of this has been tinted to an extent which transmits, preferably a translucent coating film made of the paint, covers the surface of the rubber base material and the light-transmitting coating Establishment
Light-shielding colored coating film and the light-shielding property on the surface of the transparent coating film
Provided colored coating, Ru Ttei such from the sign-shaped vent translucent portion of <br/> such forms of any character or graphics. That is, the inventors of the present invention have conducted various studies on inexpensive and high-quality switch members having a light-transmitting portion, and as a result, a key of a rubber base material formed by a conventional method of heating and pressing in a mold. on the surface of the top portion, firstly a light-colored paint to the extent that a transparent or light to bond with the rubber base material is transmitted by arranging partially rubber substrate, a transparent or light, especially in the key top upper portion of Waso Toru but that is tinted to an extent that transmits
After forming the optical coating film, on the rubber substrate and the translucent coating, applying a light-shielding colored coating to adhere to these, after having a light-shielding colored coating and hardening, the permeability Shading on the luminous coating
When sex colored coating <br/> irradiated with a laser beam in the form of any character or graphics in and removed the light-shielding colored coating of the irradiated portion of the laser beam, wherein the cutting die translucent portion formed I was found to be done. [0006] In this case, light-shielding colored coating under the film there is a transparent or translucent <br/> coating light colored transparent or thin enough to transmit heat is transparent or semi accompanying laser processing because not transmitted to the rubber substrate of transparent, light of the more than necessary depth
Morphism never part is cut, et al., Relatively small fine shape can be a vent translucent portion, also tinted paint each key top portion by multi-color printing by screen printing
Lever with different colors of the light-transmitting coating provided on top of each other,
The illuminated characters of each of the plurality of key tops can also be obtained in multiple colors. Therefore, according to this, rich easily, and inexpensively designed to variations,
The present invention was completed by confirming that a switch member having a high-quality die-cut light-transmitting portion was obtained. The rubber base material used in the present invention is also transparent.
Or, it may be obtained by a known method as long as it is made of a semitransparent rubber material . Therefore, this is an elastic one in which the dome part is an inverted rubber bowl-shaped elastic rubber rod. The material may be made of natural rubber or a diene-based synthetic rubber such as polybutadiene, polyisoprene, SBR, or neoprene, a synthetic rubber such as ethylene-propylene-based, urethane-based or silicone-based rubber, or a combination thereof. since the light transmitting unit content <br/> is transparent or translucent, good transparency, heat resistance, weather resistance, it is possible to silicone rubber which is excellent in electrical insulation. The rubber base material may be either entirely insulative or electrically conductive, but normally the contact portion is electrically conductive and the dome portion is electrically insulative. It is said that These are compression molding, injection molding,
It may be formed by a known method such as transfer molding. In the switch member of the present invention, the rubber base material obtained by this conventionally known method , particularly the key top portion, is used.
On the surface, to form a coating film or layer of the light-transmitting transparent or thin have colored paint with adhesive properties, further colored coatings with adhesion is coated on this, by heating if necessary cured, it forms a light-shielding colored coating. Since the transparent or thin have colored paint is used herein, it is necessary to adhere to the rubber base material, when the rubber base material is made of silicone rubber may be those made of silicone rubber, other species silicone sealant in the case of those of, but it is to keep such a coating primer, for example in this, put use and method shown in JP 58-8642 discloses "silicone moldings" Good. The coloring paint used for the lastly provided light-shielding colored coating film may be basically the same as the above-mentioned transparent or thinly colored paint. The light-shielding colored coating film is not applied only on the key top portion surface, but is provided on the entire key top side including the dome portion and the base portion. However, this
Since the light-shielding colored coating film is to be distinguished from the light-transmitting coating film, it is necessary to have a strong light-shielding property, and therefore, it may be colored by mixing a colorant. The thickness of the transparent or pale have colored translucent coating 5μ
The thickness of the light-shielding colored coating film having a strong light-shielding property may be about 20 μm to 60 μm . [0011] The rubber substrate having a coating film of the thus made two-layer irradiation, a predetermined character, through the character mask vent pattern such as figures, a laser beam, for example, a carbon dioxide gas laser beam either, or finely focused laser beam by, for example, by scanning the pattern to be a transparent portion irradiated, Ru provided a draft translucent portion light-shielding colored coating. Irradiation with such a laser beam cleanly removes the light-shielding colored coating film in the portion irradiated with the laser beam, and
The member for the switch can be easily obtained. An embodiment of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a longitudinal sectional view of a switch member A of the present invention, which is a rubber base including a key top portion 2, a dome portion 3, a base portion 4, and a movable contact portion 5. on the wood of the key top portion 2, a transparent or tinted paint the formed light-transmitting coating 8, paints and different-color is to be adhered to as a rubber base material 1 on the coating 8 A light-shielding colored coating film 6 made of a coloring paint is provided so as to cover the key top portion 2, the dome portion 3, and the base portion 4. Further, the portion of the light-shielding colored coating film 6 which is irradiated with laser light to form a punching pattern serves as a punching die transparent portion 7. EXAMPLES Examples of the present invention will now be given. In the examples, parts are parts by weight. Example Silicone rubber KE-951U [trade name of Shin-Etsu Chemical Co., Ltd.] 100 parts of carbon black mixed with 40 parts was molded in a mold at 180 ° C. and 200 kg / cm 2 to have a diameter of 4 mm and a thickness. It
Make a 0.5 mm movable contact, then place it in a mold and add 100 parts of silicone rubber KE-951U (explained above) to the vulcanizing agent C-8 [trade name of Shin-Etsu Chemical Co., Ltd.]. ] Filled with 2 parts of silicone compound, 180 ℃, 30kg
A key top with a movable contact on the back side when heated and pressurized to / cm 2
A transparent rubber base material having a shape in which 10 parts were connected was molded . Then, a light blue colored Silmark Blue [trade name of Shin-Etsu Chemical Co., Ltd.] was applied by screen printing to a thickness of 20 μm on the upper part of the key top of this rubber base material, and was heated and solidified at 200 ° C. for 30 minutes. after a being allowed to translucent coating, further with the light-transmitting coating surface, the key top portion of the key top side of the rubber base material, the dome portion and to the whole surface of the base portion, light-shielding colored black it is a colored paint Shirumaku black
KU [Same as above] is applied to obtain a coating film with a thickness of 60 μm , and the mixture is heated and solidified at 200 ° C for 30 minutes to form a light-shielding colored coating film .
Growth was. [0015] Then through key top black shielding <br/> light-colored coating stainless steel mask overtaken form 0-9 on the membrane of the rubber substrate, a carbon dioxide gas laser energy 4,5J irradiated, switch member of the present invention having a number-shaped vent translucent portion of the key top portion 0-9 was obtained. The switching member of the present invention exhibits but is provided with a light-shielding colored coating and punching translucent portion and the light-transmitting coating on the surface of rubber base material, the cutting die Toru The light section has good dimensional accuracy,
The section outline becomes clear and the contrast becomes clear, and the multicolor printing of the translucent coating has an advantage that the illuminated letters can also be multicolored.
【図面の簡単な説明】 【図１】本発明のスイッチ用部材の縦断面図である。 【符号の説明】 Ａ （ゴム製）スイッチ用部材 １ （スイッチ用）ゴム基材 ２ キートップ部 ３ ドーム部 ４ ベース部 ５ 可動接点部 ６ 遮光性着色塗膜 ７ 抜き型透光部 ８ 透光性塗膜BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a vertical cross-sectional view of a switch member of the present invention. [Explanation of reference signs] A (rubber) switch member 1 (switch) rubber base material 2 key top portion 3 dome portion 4 base portion 5 movable contact portion 6 light-shielding colored coating film 7 light-transmitting transparent portion 8 light transmission Coating film
Claims (1)
部、ドーム部及びベース部を有するスイッチ用ゴム基材
と、この表面に設けられた透明または光が透過する程度
に薄く着色された透光性塗膜と、前記スイッチ用ゴム基
材及び透光性塗膜の表面を被覆して設けられた遮光性着
色塗膜と、前記透光性塗膜面上の遮光性着色塗膜に設け
られた抜き型透光部とからなることを特徴とするゴム製
スイッチ用部材。２．キートップ部が複数個あり、各キートップ部上に設
けられた透光性塗膜が互いに相異なる色に印刷されてな
るものである請求項１記載のゴム製スイッチ用部材。 (57) [Claims] Key top made of transparent or translucent rubber material
Parts, rubber substrate switch having a dome portion and a base portion
When a thin colored translucent coating to the extent that a transparent or light provided on the surface of this passes, rubber base for the switch
Material and light-transmitting coating provided on the surface of the transparent coating
A rubber switch member , comprising: a color coating film; and a punch-out light -transmitting portion provided on the light-shielding colored coating film on the light-transmitting coating film surface . 2. There are multiple key tops and they are installed on each key top.
The translucent coating that has been removed must not be printed in different colors.
The rubber switch member according to claim 1, which is a member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6136902A JP2670016B2 (en) | 1994-06-20 | 1994-06-20 | Rubber switch member |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6136902A JP2670016B2 (en) | 1994-06-20 | 1994-06-20 | Rubber switch member |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62013855A Division JPS63181213A (en) | 1987-01-23 | 1987-01-23 | Manufacture of cover member for rubber switch |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH07307120A JPH07307120A (en) | 1995-11-21 |
| JP2670016B2 true JP2670016B2 (en) | 1997-10-29 |
Family
ID=15186244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6136902A Expired - Lifetime JP2670016B2 (en) | 1994-06-20 | 1994-06-20 | Rubber switch member |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2670016B2 (en) |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59171416A (en) * | 1983-03-19 | 1984-09-27 | 九州日立マクセル株式会社 | Method of producing key top |
| JPS6283783A (en) * | 1985-10-09 | 1987-04-17 | マルイ工業株式会社 | Colored transmitting display panel |
-
1994
- 1994-06-20 JP JP6136902A patent/JP2670016B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH07307120A (en) | 1995-11-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| EXPY | Cancellation because of completion of term |