JPH0770271B2 - Rubber cover member for push button switch and method of manufacturing the same - Google Patents
Rubber cover member for push button switch and method of manufacturing the sameInfo
- Publication number
- JPH0770271B2 JPH0770271B2 JP17806190A JP17806190A JPH0770271B2 JP H0770271 B2 JPH0770271 B2 JP H0770271B2 JP 17806190 A JP17806190 A JP 17806190A JP 17806190 A JP17806190 A JP 17806190A JP H0770271 B2 JPH0770271 B2 JP H0770271B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- colored layer
- cover member
- transmitting
- button switch
- 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
- 229920001971 elastomer Polymers 0.000 title claims description 12
- 239000005060 rubber Substances 0.000 title claims description 12
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 239000010410 layer Substances 0.000 claims description 56
- 239000011241 protective layer Substances 0.000 claims description 15
- 239000000463 material Substances 0.000 claims description 4
- 230000001678 irradiating effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 description 12
- 239000003973 paint Substances 0.000 description 7
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Chemical compound CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 3
- 239000003795 chemical substances by application Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 239000003086 colorant Substances 0.000 description 2
- 238000004040 coloring Methods 0.000 description 2
- 238000007796 conventional method Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000007650 screen-printing Methods 0.000 description 2
- 229920003051 synthetic elastomer Polymers 0.000 description 2
- 239000005061 synthetic rubber Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 244000043261 Hevea brasiliensis Species 0.000 description 1
- 239000005062 Polybutadiene Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 239000003054 catalyst Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- HQQADJVZYDDRJT-UHFFFAOYSA-N ethene;prop-1-ene Chemical group C=C.CC=C HQQADJVZYDDRJT-UHFFFAOYSA-N 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000003550 marker Substances 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
- 229920001194 natural rubber Polymers 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 229920001084 poly(chloroprene) Polymers 0.000 description 1
- 229920002857 polybutadiene Polymers 0.000 description 1
- 229920001195 polyisoprene Polymers 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- 229920003048 styrene butadiene rubber Polymers 0.000 description 1
- 238000001721 transfer moulding Methods 0.000 description 1
- 239000012780 transparent material Substances 0.000 description 1
- 239000012463 white pigment Substances 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
- H01H9/18—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks
- H01H2009/187—Distinguishing marks on switches, e.g. for indicating switch location in the dark; Adaptation of switches to receive distinguishing marks having symbols engraved or printed by laser
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2209/00—Layers
- H01H2209/016—Protection layer, e.g. for legend, anti-scratch
Landscapes
- Manufacture Of Switches (AREA)
- Push-Button Switches (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、ゴム製押釦スイッチ用カバー部材（以下単に
カバー部材という）、特にはその表面に所定符号の形状
に穿設された透光部を有する照光式カバー部材であっ
て、例えば車載用電話機等に用いられる各種押釦スイッ
チまたは、暗所用押釦スイッチ等に有用なカバー部材及
びその製造方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a cover member for a rubber push button switch (hereinafter, simply referred to as a cover member), and particularly to a translucent portion formed on a surface thereof with a predetermined sign. The present invention relates to an illumination type cover member having, and a cover member useful for various push button switches used in, for example, an in-vehicle telephone or a dark place push button switch, and a manufacturing method thereof.
［従来の技術］ 近年押釦スイッチの押釦部にはゴム製カバーが用いられ
ているが、これは外装が優れ、また多数のキー部が一体
に成形されることから各種産業用機器の入力用として広
く利用されている。[Prior Art] In recent years, a rubber cover is used for the push button part of a push button switch, but this has an excellent exterior and a large number of key parts are integrally molded, so that it is used as an input for various industrial equipment. Widely used.
この種のカバー部材においては、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
操作性を向上させるために、その一部に透明または半透
明の所定文字や図形形状の透光部を設け、その背面に光
源を置いて所定の文字や図形のみを照光する照光式のも
のが増加している（特願昭61−177989、特願昭62−3733
5、特開昭62−268025）。In this type of cover member, in order to confirm whether the push button switch is pressed firmly or to improve operability in a dark place, a part of the transparent or translucent predetermined character or graphic shape is used. There is an increasing number of illumination-type devices that provide a light-transmitting part and place a light source on the back surface to illuminate only predetermined characters and figures (Japanese Patent Application Nos. 61-177989 and 62-3733).
5, JP 62-268025).
この照光式カバー部材は種々の方法で製造されるが、歩
留まり、外観、工程等の点から、レーザー光を照射して
文字及び図形を形成する方法が現在では最も優れている
と考えられる。Although this illuminated cover member is manufactured by various methods, the method of irradiating a laser beam to form characters and figures is considered to be the best at present from the viewpoints of yield, appearance, process and the like.
例えば、特願昭62−13855には、目的とする透光部を穿
設するカバー部材を容易かつ安価に得る方法が記載さ
れ、第７図に示すようなこの方法により作られた透光性
着色層を有するスイッチが照光式スイッチとして現在主
に用いられている。同図に示すゴム製押釦スイッチ用カ
バー部材１は、２のキートップ部、３のドーム部、４の
脚部、５の可動接点部、６の透光製着色層よりなり、遮
光性着色層８に透光部９を穿設したものである。For example, Japanese Patent Application No. 62-13855 describes a method for easily and inexpensively obtaining a cover member having a desired light-transmitting portion, and the light-transmitting property produced by this method as shown in FIG. Currently, a switch having a colored layer is mainly used as an illuminated switch. The rubber push-button switch cover member 1 shown in the figure comprises a key top portion 2; a dome portion 3; a leg portion 4; a movable contact portion 5; a transparent colored layer 6; 8 is provided with a light transmitting portion 9.
［発明が解決しようとする課題］ しかしながらかかるカバー部材の製造にあたり、レーザ
ー光の照射により遮光性着色層を除去して透光部を形成
しようとすると、遮光性着色層の厚みや、レーザー光の
エネルギーのバラツキにより、遮光性着色層の一部が残
ったり、逆に透光性着色層までも一部除去され、透光性
着色層の色の濃淡となって外観が見苦しくなるという不
利があった。このため遮光性着色層の厚みや、レーザー
光のエネルギー設定等の製造条件の管理がむづかしく、
合格率が著しく低下するのが欠点であった。[Problems to be Solved by the Invention] However, in the production of such a cover member, if the light-shielding colored layer is removed by irradiation with laser light to form a light-transmitting portion, the thickness of the light-shielding colored layer and the laser light Due to energy variations, part of the light-shielding colored layer may remain, or conversely, even the light-transmitting colored layer may be partially removed, resulting in the light and shade of the light-transmitting colored layer, which makes the appearance unsightly. It was For this reason, it is difficult to control the manufacturing conditions such as the thickness of the light-shielding colored layer and the energy setting of laser light,
The drawback is that the pass rate is significantly reduced.
［課題を解決するための手段］ 本発明者らは、光透過部を有するカバー部材の安価で安
定的な工業的製造方法について種々検討した結果、金型
中で加熱、加圧する常法で形成されたカバー部材のキー
トップ側の表面に透光性着色層、その上に透光性保護
層、さらにその上に遮光性着色層を設け、この遮光性着
色層にレーザー光を照射すると、遮光性着色層の厚みの
バラツキによる加工深さのバラツキを、透光性保護層が
吸収して熱的影響を与えることを防ぐため、加工安定性
が増し、歩留まり、品質も向上することを見出した。こ
の方法によって、容易、安価に、かつ安定的に高品位の
透光部をもつカバー部材が得られたのであって、これは
透明または半透明ゴム材料を用いて成形したカバー部材
の表面に透光性着色層を設け、この上に透光部を所定符
号形状に穿設した遮光性着色層を有するカバー部材にお
いて、透光性着色層と遮光性着色層との間に透光性保護
層を設けてなることを特徴とするカバー部材およびその
製造方法である。[Means for Solving the Problems] As a result of various studies on the inexpensive and stable industrial manufacturing method of the cover member having the light transmitting portion, the present inventors formed it by a conventional method of heating and pressing in a mold. When a light-transmitting colored layer is provided on the key top side surface of the covered cover member, a light-transmitting protective layer is provided thereon, and a light-shielding coloring layer is further provided thereon, and the light-shielding coloring layer is irradiated with laser light, light-shielding is performed. It was found that the processing stability is increased, the yield and the quality are improved because the translucent protective layer prevents the thermal protection from absorbing the variation in the processing depth due to the variation in the thickness of the colored layer. . By this method, a cover member having a high-quality light-transmitting portion was obtained easily, inexpensively, and stably, and it was formed on a surface of a cover member molded from a transparent or translucent rubber material. A cover member having a light-shielding colored layer provided with a light-transmitting colored layer on which a light-transmitting portion is formed in a predetermined sign shape, wherein a light-transmitting protective layer is provided between the light-transmitting colored layer and the light-shielding colored layer. And a method of manufacturing the cover member.
本発明の照光式カバー部材のうち透明または半透明のカ
バー部材自体は、公知の方法で作られたものでよい。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
されたエラステック性のもので、天然ゴムまたはポリブ
タジエン、ポリイソプレン、SBR、ネオプレン等のジエ
ン系合成ゴム、エチレン−プロピレン系、ウレタン系、
シリコーン系等の合成ゴムあるいはこれらの組合せから
作られたものとすればよいが、これは透明性、断熱性、
耐候性、電気絶縁性に優れているシリコーンゴム製とす
るのが好ましい。The transparent or translucent cover member itself of the illuminated cover member of the present invention may be manufactured by a known method. Therefore, this is an elastic material in which the dome portion is an elastic rubber rod in the shape of an inverted bowl, natural rubber or dibutadiene synthetic rubber such as polybutadiene, polyisoprene, SBR, neoprene, ethylene-propylene-based, urethane-based,
It may be made of synthetic rubber such as silicone type or a combination thereof, which is transparent, heat insulating,
It is preferably made of silicone rubber which is excellent in weather resistance and electric insulation.
またこのカバー部材は、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もよいが、通常は接点部
を導電性とし、その他を絶縁性としたもので、圧縮成
形、射出成形、トランスファー成形等の公知の方法で作
られる。The cover member may be either entirely insulative or electrically conductive, but normally the contact part is electrically conductive and the other parts are electrically insulating, such as compression molding, injection molding, It is made by a known method such as transfer molding.
一方透光性着色層は、最初に光を透過させるもので、着
色剤を混入して着色するが、透光性を確保すため、厚み
はその透光性に応じて決定され、おおむね３〜30μｍ程
度が好ましい。On the other hand, the translucent colored layer is a layer that initially transmits light, and is colored by mixing a colorant. However, in order to ensure translucency, the thickness is determined according to the translucency, and is generally 3 to About 30 μm is preferable.
他方遮光性着色層は、透光部以外は遮光されるべきもの
であるから、遮光性の強いものとする必要があり、通常
着色剤を混入し、黒色、灰色、茶色等に着色し、この厚
みはその遮光性に応じて５〜40μｍ程度のものとする。On the other hand, the light-shielding colored layer is to be shielded except for the light-transmitting portion, so it is necessary to have a strong light-shielding property, and usually a coloring agent is mixed and colored in black, gray, brown or the like. The thickness is about 5 to 40 μm depending on its light shielding property.
この透光性着色層と遮光性着色層の間に設けられる透光
性保護層は、レーザー光の照射による遮光性着色層の除
去の際の加工深さのバラツキを吸収するための保護層で
あるから、この下の透光性着色層の色調を生かすために
透明または半透明とし、この厚みは遮光性着色層の厚み
のバラツキに応じて８〜30μｍ程度が望ましい。また必
要に応じて艶消し処理等を施してもよい。The light-transmitting protective layer provided between the light-transmitting colored layer and the light-shielding colored layer is a protective layer for absorbing variations in processing depth when removing the light-shielding colored layer due to laser light irradiation. Therefore, in order to make the best use of the color tone of the light-transmitting colored layer therebelow, it is made transparent or semi-transparent, and its thickness is preferably about 8 to 30 μm depending on the variation in the thickness of the light-shielding colored layer. Moreover, you may perform a matting process etc. as needed.
これら透光性着色層、透光性保護層、遮光性着色層の形
成は塗装、印刷等公知の方法で形成すればよい。またこ
れら３つの各層は透明または半透明で作られたカバー部
材の全部または一部に設けられても差支えない。The light-transmitting colored layer, the light-transmitting protective layer, and the light-shielding colored layer may be formed by a known method such as painting or printing. Further, each of these three layers may be provided on all or a part of the transparent or translucent cover member.
本発明はこのようにして作られた３層を有するカバー部
材に、レーザー光を照射して所定の符号を形成するよう
表面の遮光性着色層を除去し透光部を作るのであるが、
このレーザー光の照射は、例えばNd:YAG（Neodium:Yttr
ium Aluminium Garnet）レーザーによって発振されたレ
ーザー光の光束を、透光部としたい符号形状のマスクを
通過させた後、レンズで焦点をあわせて照射するか、あ
るいは細くしぼったレーザー光を透光部としたい符号の
形状に走査し照射すればよい。In the present invention, the cover member having the three layers thus formed is irradiated with laser light to remove the light-shielding colored layer on the surface so as to form a predetermined code, and the light transmitting portion is formed.
Irradiation of this laser light is performed, for example, with Nd: YAG (Neodium: Yttr
After passing the light beam of the laser light oscillated by the laser through the mask of the code shape that you want to use as the light-transmitting part, irradiate it with focusing with a lens, or the thin laser light is transmitted through the light-transmitting part. The desired shape may be scanned and irradiated.
つぎに本発明のカバー部材およびその製造方法を添付の
図面に基づいて説明する。Next, the cover member of the present invention and the manufacturing method thereof will be described with reference to the accompanying drawings.
第１図〜第５図は、本発明の各製造工程におけるカバー
部材の縦断面図を示す。第１図に示すように、透明また
は半透明ゴム材料で作られたキートップ部２を、ドーム
部３、脚部４が支持し、キートップ部２の背面に可動接
点部５が固着されている。つぎに第２図に示すようにキ
ートップ部２の表面に透光性着色層６を設け、ついで第
３図に示すよう、この透光性着色層６上に透光性保護層
７を設ける。つぎに第４図に示すよう、第３図までに作
ったカバー部材の全体を覆って遮光性着色層８を設けた
後、第５図に示すように、遮光性着色層８のキートップ
部２の表面に対向する部分に所定符号の形状にレーザー
光を照射して遮光性着色層８を除去し、透光部９を穿設
して本発明のカバー部材１が完成される。1 to 5 are vertical sectional views of the cover member in each manufacturing process of the present invention. As shown in FIG. 1, the dome portion 3 and the leg portions 4 support the key top portion 2 made of a transparent or semi-transparent rubber material, and the movable contact portion 5 is fixed to the back surface of the key top portion 2. There is. Next, as shown in FIG. 2, a light-transmitting colored layer 6 is provided on the surface of the key top portion 2, and then, as shown in FIG. 3, a light-transmitting protective layer 7 is provided on the light-transmitting colored layer 6. . Next, as shown in FIG. 4, after the cover member made up to FIG. 3 is entirely covered with the light-shielding colored layer 8, as shown in FIG. 5, the key top portion of the light-shielding colored layer 8 is provided. The cover member 1 of the present invention is completed by irradiating the portion facing the surface of 2 with a laser beam in the shape of a predetermined code to remove the light-shielding colored layer 8 and forming the transparent portion 9.
［実施例］ つぎに本発明の実施例をあげるが、例中の部は重量部を
示す。[Examples] Next, examples of the present invention will be given. In the examples, parts indicate parts by weight.
まずシリコーンゴムKE78VBS（信越化学工業（株）製、
商品名）100部にカーボンブラック40部、加硫剤Ｃ−８
（信越化学工業（株）製、商品名）２部を混合し、金型
内で180℃、200kg/cm2で成形し、直径4mm、厚さ0.5mmの
可動接点を作る。ついでこれを金型内に載置し、ここに
シリコーンゴムKE951U（信越化学工業（株）製、商品
名）100部に加硫剤Ｃ−8B（信越化学工業（株）製、商
品名）0.5部を加えたシリコーンゴムコンパウンドを充
填し、180℃、200kg/cm2に加熱、加圧して、第１図に示
したカバー部材が10個連接された透明な成形体を作っ
た。First, silicone rubber KE78VBS (Shin-Etsu Chemical Co., Ltd.,
Product name) 100 parts carbon black 40 parts, vulcanizing agent C-8
(Shin-Etsu Chemical Co., Ltd., trade name) 2 parts are mixed and molded in a mold at 180 ° C. and 200 kg / cm 2 to make a movable contact with a diameter of 4 mm and a thickness of 0.5 mm. Then, this was placed in a mold, and 100 parts of silicone rubber KE951U (manufactured by Shin-Etsu Chemical Co., Ltd., trade name) was added to vulcanizing agent C-8B (manufactured by Shin-Etsu Chemical Co., Ltd., trade name) 0.5 parts. A silicone rubber compound with parts added was filled, heated at 180 ° C. and 200 kg / cm 2 and pressed to form a transparent molded body in which ten cover members shown in FIG. 1 were connected.
ついでシルマーク（信越化学工業（株）製、商品名）10
0部に対し白色顔料23部を加え、光が透過する程度に着
色された塗料を作り、これを第１図に示すキートップ部
２の表面にスクリーン印刷により厚さ10μｍ程度に印刷
し、200℃で30分間加熱し固着させて透光性着色層６を
形成した。Silmark (Shin-Etsu Chemical Co., Ltd., trade name) 10
23 parts of white pigment is added to 0 part to make a paint that is colored to allow light to pass through, and this is printed on the surface of the key top part 2 shown in FIG. 1 by screen printing to a thickness of about 10 μm. The transparent colored layer 6 was formed by heating and fixing at 30 ° C. for 30 minutes.
つぎにこの上に、シルコートＳ（信越化学工業（株）
製、商品名）100部に対しシルマーク34部およびシリカ1
2部を加えて作った透明材料を、スクリーン印刷により
厚さ３、５、８、15、30、45μｍになるよう印刷し、20
0℃で30分間加熱し固着させて透光性保護層７を形成し
た。Next, on top of this, Silcoat S (Shin-Etsu Chemical Co., Ltd.)
Made, trade name) 100 parts of Silmark 34 parts and silica 1
The transparent material made by adding 2 parts is printed by screen printing to a thickness of 3, 5, 8, 15, 30, 45 μm, and 20
The transparent protective layer 7 was formed by heating and fixing at 0 ° C. for 30 minutes.
ついで、シルマーク100部に対し、黒顔料10部、トルエ
ン300部、硬化剤KF−99（信越化学工業（株）製、商品
名）８部、触媒Cat−PL−II（信越化学工業（株）製、
商品名）0.03部を配合した黒色塗料を前記第３図のカバ
ー部材全面にエアースプレーにより、厚さ20、30、40、
50、60、70μｍになるよう塗布した後、200℃で30分間
加熱し固着させて第４図に示すカバー部材を得た。Next, for 100 parts of Silmark, 10 parts of black pigment, 300 parts of toluene, 8 parts of curing agent KF-99 (manufactured by Shin-Etsu Chemical Co., Ltd., trade name), catalyst Cat-PL-II (Shin-Etsu Chemical Co., Ltd.) Made by
Brand name) Black paint mixed with 0.03 parts is air sprayed on the entire surface of the cover member of FIG. 3 to obtain thicknesses of 20, 30, 40,
After coating so as to have a thickness of 50, 60 and 70 μm, it was heated and fixed at 200 ° C. for 30 minutes to obtain a cover member shown in FIG.
このようにして作られた各種膜厚を有するカバー部材の
キートップ部上の黒色塗料膜よりなる遮光性着色層上
に、Nd:YAGレーザーマーカーSL−478J（日本電気（株）
製、商品名）を用い、「AS」の文字の形を抜きアルミ蒸
着されたガラスマスクを通して、15ジュールのエネルギ
ーでレーザー光を数パルス照射し、文字の形状の透光部
を穿設した。透光製着色層と黒色塗料膜の厚さによる外
観の変化を比較した結果を第１表に示す。第２表は判定
基準を示し、Ｂの状態が合格その他は不合格である。The Nd: YAG laser marker SL-478J (NEC Corporation) was formed on the light-shielding colored layer made of the black paint film on the key top portion of the cover member having various film thicknesses thus produced.
(Product name), the shape of the letter "AS" was removed and a few pulses of laser light were irradiated with an energy of 15 joules through a glass mask vapor-deposited with aluminum to form a light-transmitting portion in the shape of the letter. Table 1 shows the results of comparison of changes in appearance depending on the thickness of the transparent colored layer and the black paint film. Table 2 shows the criterion, and the state of B is pass and the others are fail.
この結果、透光性保護層が厚み５μｍ以上でその厚みが
厚い方が、レーザー光照射でより広い黒色塗料膜の厚み
範囲に良好な透光部を穿設する、すなわち黒色塗料膜を
完全に除去し、かつ透光性着色層には影響を与えないと
いう加工が可能であることが判明した。ここで黒色塗料
膜の厚みは20μｍ以下であると遮光性が低下し、60μｍ
以上では表面に凹凸が著しく発生し、外観が低下するた
め実用上30〜50μｍの範囲が適当である。 As a result, when the light-transmitting protective layer has a thickness of 5 μm or more and is thicker, a good light-transmitting part is formed in a wider thickness range of the black paint film by laser irradiation, that is, the black paint film is completely formed. It has been found that processing is possible which removes and does not affect the translucent colored layer. Here, if the thickness of the black paint film is 20 μm or less, the light-shielding property is deteriorated, and 60 μm
In the above case, the surface irregularities remarkably occur and the appearance is deteriorated, so that the range of 30 to 50 μm is suitable for practical use.
この結果から、必要な透光性保護層の厚みは８〜30μｍ
程度が望ましい。なお透光性保護層は、レーザー光の照
射による熱を下層にある透光性着色層に伝えにくくする
働きをするものであればよく、透光性があれば本実施例
で用いた配合に限定されるものではない。From this result, the required thickness of the translucent protective layer is 8 to 30 μm.
The degree is desirable. Note that the light-transmitting protective layer may be one that functions to make it difficult to transfer heat due to laser light irradiation to the light-transmitting colored layer in the lower layer. It is not limited.
［発明の効果］ 前記実施例より明らかなように、透光性着色層と遮光性
着色層の間に透光性保護層を設けることにより、レーザ
ー光を照射して遮光性着色層を除去し、所定の符号の形
状に透光部を形成する際、遮光性着色層の厚みのバラツ
キにより、遮光性着色層が透光部に一部残ったり、逆に
透光性着色層が一部除去されてしまうような不具合を解
決することができ、レーザー光の照射による加工の安定
性が著しく向上し、歩留まり、品質の向上が期待でき、
本発明の産業上に及ぼす効果はきわめて大きい。[Effects of the Invention] As is clear from the above examples, by providing a light-transmitting protective layer between the light-transmitting colored layer and the light-shielding colored layer, the light-shielding colored layer is removed by irradiation with laser light. , When forming a light-transmitting part in the shape of a predetermined code, due to the variation in the thickness of the light-shielding colored layer, a part of the light-shielding colored layer remains in the light-transmitting part, or conversely a part of the light-transmitting colored layer is removed. It is possible to solve such problems that occur, the stability of processing due to laser light irradiation is significantly improved, and the yield and quality can be expected to improve.
The industrial effect of the present invention is extremely large.
第１図から第５図は、本発明の方法の各製造工程におけ
るカバー部材の構成を縦断面図で示したもので、このう
ち第５図は本発明の方法で得られた透光部を有するカバ
ー部材の完成品の縦断面図である。第６図、第７図は従
来の方法で得られた透光部を有するカバー部材の縦断面
図である。１ ……ゴム製押釦スイッチ用カバー部材、 ２……キートップ部、３……ドーム部、４……脚部、 ５……可動接点部、６……透光性着色層、 ７……透光性保護層、８……遮光性着色層、 ９……透光部。1 to 5 are longitudinal sectional views showing the structure of the cover member in each manufacturing step of the method of the present invention. Of these, FIG. 5 shows the translucent part obtained by the method of the present invention. It is a longitudinal cross-sectional view of a finished product of the cover member. FIG. 6 and FIG. 7 are vertical cross-sectional views of a cover member having a light transmitting portion obtained by a conventional method. 1 ... Rubber push button switch cover member, 2 ... Key top part, 3 ... Dome part, 4 ... Leg part, 5 ... Movable contact part, 6 ... Translucent colored layer, 7 ... Transparency Light-protective layer, 8 ... Light-shielding colored layer, 9 ... Light-transmitting part.
Claims (2)
た押釦スイッチ用カバー部材の表面に透光性着色層を設
け、この上に透光部を所定符号形状に穿設した遮光性着
色層を有する照光式押釦スイッチ用カバー部材におい
て、透光性着色層と遮光性着色層との間に透光性保護層
を設けてなることを特徴とするゴム製押釦スイッチ用カ
バー部材。1. A light-shielding colored layer in which a light-transmitting colored layer is provided on the surface of a cover member for a push button switch formed by using a transparent or semi-transparent rubber material, and a light-transmitting portion is formed in a predetermined code shape on the light-transmitting colored layer. A cover member for a push-button switch made of rubber, wherein the cover member for an illuminated push-button switch has a light-transmitting protective layer provided between a light-transmitting colored layer and a light-shielding colored layer.
た押釦スイッチ用カバー部材の表面に、透光性着色層、
透光性保護層および遮光性着色層を順次重ねて設けた
後、レーザー光を照射して所定符号形状に遮光性着色層
を除去して透光部を形成することを特徴とするゴム製押
釦スイッチ用カバー部材の製造方法。2. A translucent colored layer on the surface of a cover member for a push button switch, which is molded using a transparent or semitransparent rubber material.
A rubber push button characterized in that after a light-transmitting protective layer and a light-shielding colored layer are successively stacked, a light-transmitting portion is formed by irradiating laser light to remove the light-shielding colored layer in a predetermined code shape. A method of manufacturing a cover member for a switch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17806190A JPH0770271B2 (en) | 1990-07-05 | 1990-07-05 | Rubber cover member for push button switch and method of manufacturing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17806190A JPH0770271B2 (en) | 1990-07-05 | 1990-07-05 | Rubber cover member for push button switch and method of manufacturing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0467521A JPH0467521A (en) | 1992-03-03 |
| JPH0770271B2 true JPH0770271B2 (en) | 1995-07-31 |
Family
ID=16041927
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17806190A Expired - Lifetime JPH0770271B2 (en) | 1990-07-05 | 1990-07-05 | Rubber cover member for push button switch and method of manufacturing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0770271B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2566018Y2 (en) * | 1991-04-19 | 1998-03-25 | ナイルス部品株式会社 | Knobs for various switches |
| JP2657160B2 (en) * | 1992-02-14 | 1997-09-24 | 信越ポリマー株式会社 | Method of manufacturing cover member for illuminated push button switch |
| JP5188650B2 (en) * | 2010-03-24 | 2013-04-24 | 三菱電機株式会社 | Method for manufacturing buttons with convex characters |
-
1990
- 1990-07-05 JP JP17806190A patent/JPH0770271B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0467521A (en) | 1992-03-03 |
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