JPH0145689B2 - - Google Patents
Info
- Publication number
- JPH0145689B2 JPH0145689B2 JP55092018A JP9201880A JPH0145689B2 JP H0145689 B2 JPH0145689 B2 JP H0145689B2 JP 55092018 A JP55092018 A JP 55092018A JP 9201880 A JP9201880 A JP 9201880A JP H0145689 B2 JPH0145689 B2 JP H0145689B2
- Authority
- JP
- Japan
- Prior art keywords
- push button
- resin sheet
- mold
- resin
- recess
- 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
Links
- 229920005989 resin Polymers 0.000 claims description 27
- 239000011347 resin Substances 0.000 claims description 27
- 125000006850 spacer group Chemical group 0.000 claims description 14
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 8
- 238000000034 method Methods 0.000 description 7
- 239000000758 substrate Substances 0.000 description 7
- 229920002379 silicone rubber Polymers 0.000 description 4
- 239000004945 silicone rubber Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 229920000728 polyester Polymers 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000035699 permeability Effects 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 238000000748 compression moulding Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229920001971 elastomer Polymers 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 238000004898 kneading Methods 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 229920001778 nylon Polymers 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
Landscapes
- Input From Keyboards Or The Like (AREA)
- Push-Button Switches (AREA)
Description
【発明の詳細な説明】
本発明は電子式卓上計算機等に使われる多数個
の押釦を有するキーボードスイツチの製造方法に
関するもので、操作感触の良いキーボードを優れ
た組立性で製造できるキーボードスイツチの製造
方法を提供することを目的する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a keyboard switch having a large number of push buttons used in electronic desk calculators, etc. The present invention relates to a method for manufacturing a keyboard switch having a large number of push buttons used in electronic desktop calculators, etc., and the invention relates to a method for manufacturing a keyboard switch that has a large number of push buttons, and is capable of manufacturing a keyboard with a good operating feel and excellent assemblability. The purpose is to provide a method.
従来のキーボードスイツチは第１図に示すよう
に、シート状の材料に、ドーム１ａを形成してな
るシート部材１の上方に押釦２が設けられ、しか
もドーム１ａの下面には可動接点１ｂが固着され
ている。シート部材１の下方には基板３が設けら
れ、基板３の上に固定接点３ｂが固着している。
指で押釦２を押すと、押釦の作動部２ａがドーム
１ａを押し下げる。そのためドーム１ａが可動接
点１ｂを固定接点３ｂに接触させて回路を形成す
る。スペーサー４は押釦に充分な操作ストローク
を与えるために設けられるもので穴４ａを有す
る。シート部材１の上方にはキヤビネツト５が設
けられ、その上にはパネル６が設けられる。 As shown in Fig. 1, a conventional keyboard switch has a push button 2 above a sheet member 1 formed of a dome 1a on a sheet-like material, and a movable contact 1b fixed to the bottom surface of the dome 1a. has been done. A substrate 3 is provided below the sheet member 1, and a fixed contact 3b is fixed onto the substrate 3.
When the push button 2 is pressed with a finger, the operating portion 2a of the push button pushes down the dome 1a. Therefore, the dome 1a brings the movable contact 1b into contact with the fixed contact 3b to form a circuit. The spacer 4 is provided to give a sufficient operating stroke to the push button, and has a hole 4a. A cabinet 5 is provided above the sheet member 1, and a panel 6 is provided above it.
しかしながらこの種のキーボードスイツチにお
いて、特に多機能を有する電子式卓上計算機にお
いては、20個にもおよび多数の押釦２を必要とす
るためその組立に工数がかかり、しかもアフター
サービスの際に、押釦を紛失したりすることが多
かつた。しかも押釦２にはツバ２ｂが必要である
が、このツバ２ｂは樹脂成形加工上、どうしても
0.5mm〜1.0mmの厚さが必要であるため、全体を３
mm程度に構成しなければならないポケツト型の電
子式卓上計算機のキーボードスイツチにおいて
は、薄型化を計るうえでの大きなネツクになつて
いた。 However, in this type of keyboard switch, especially in electronic desktop calculators with multi-functions, as many as 20 push buttons 2 are required, which takes a lot of man-hours to assemble. It was often lost. Moreover, the push button 2 requires a collar 2b, but this collar 2b is unavoidable due to the resin molding process.
Since a thickness of 0.5mm to 1.0mm is required, the whole
Keyboard switches for pocket-type electronic desktop calculators, which have to be constructed in the order of mm, have become a major hurdle in trying to make them thinner.
第２図に示すのは別の従来例である。上記欠点
を解決するため、シリコンゴム製の押釦１１ａに
一体的に復帰バネ部１１ｂ、シート部１１ｃを設
け、押口１１ａの下部に可動接点１２を固着して
いる。押釦１１ａの上面は表面を堅くするための
樹脂等のカバー１３により覆われ、押釦ユニツト
１１を構成している。可動接点１２の下には固定
接点３ｂを有する基板３が設けられ、指で押釦１
１ａをおすと、可動接点１２が固定接点３ｂに接
して回路を形成する。シート部１１ｃの上には基
板３とパネル６との間隔を保つためのキヤビネツ
ト１５が設けられている。 Another conventional example is shown in FIG. In order to solve the above drawbacks, a return spring portion 11b and a seat portion 11c are integrally provided on the push button 11a made of silicone rubber, and a movable contact 12 is fixed to the lower part of the push opening 11a. The upper surface of the push button 11a is covered with a cover 13 made of resin or the like to make the surface hard, and constitutes a push button unit 11. A substrate 3 having a fixed contact 3b is provided below the movable contact 12, and the button 1 can be pressed with a finger.
When 1a is pressed, the movable contact 12 contacts the fixed contact 3b to form a circuit. A cabinet 15 for maintaining the distance between the substrate 3 and the panel 6 is provided on the sheet portion 11c.
しかしながらこの種のキーボードスイツチにお
いては復帰バネ部１１ｂがシリコンゴム製である
ため、押釦１１ｄの操作感触が悪く、高級な電子
式卓上計算機には適さなかつた。さらにシリコン
ゴム製の押釦ユニツト１１を製造するにはゴム材
料の配合や、練りのための大規模な設備が必要で
あり、更に、押釦１１ａを復帰バネ部１１ｂより
大きくすることは金型構造上不可能であるため、
押釦１１ａはどうしても小さくなり、操作がし難
い等の欠点を有していた。 However, in this type of keyboard switch, since the return spring portion 11b is made of silicone rubber, the push button 11d has a poor operating feel, making it unsuitable for high-grade electronic desktop calculators. Furthermore, manufacturing the push button unit 11 made of silicone rubber requires large-scale equipment for compounding and kneading rubber materials, and furthermore, it is difficult to make the push button 11a larger than the return spring portion 11b due to the structure of the mold. Because it is impossible
The push button 11a has disadvantages such as being small and difficult to operate.
本発明は上記従来の欠点を解消するもので、以
下にその実施例を第３〜第８図に基づいて説明す
る。 The present invention solves the above-mentioned conventional drawbacks, and embodiments thereof will be described below with reference to FIGS. 3 to 8.
第３図において、ポリエステル等の樹脂製のシ
ート部材２４にはドーム２４ａが設けられ、ドー
ム２４ａの中央には穴２４ｂがあけられている。
樹脂製の押釦２１ａは穴２４ｂに貫通する作動部
２１ｂが設けられることにより押釦２１ａはシー
ト２４に固着している。シート１４にはさらに穴
２４ｃがあけられ、穴２４ｃの上部には樹脂製の
スペーサー２１ｃが、下方には位置決め用ボス２
１ｂが一体的に成形されている。作動部２１ｂの
下部には可動接点２２が固着されて押釦ユニツト
２０を構成する。可動接点２２の下には固定接点
２３ｂを有する基板２３が設けられ、押釦２１ａ
を押で押すと、作動部２１ｂは可動接点２２を下
方へ押し下げ始める。この時、シート部材２４の
ドーム２４ａはある一定以上の荷重になると雪崩
れ現象を起こして急激にたわんで可動接点２２は
下降し、基板２３上の固定接点２３ｂに接して回
路を形成する。この時、指には非常に良好な操作
感を与える。尚、基板２３には位置決め用穴２３
ｃがあり、押釦ユニツト２０の位置決め用ボス２
１ｄがはまり込んで固定接点２３ｂと可動接点２
２の間に位置決めをする。さらにパネル６はスペ
ーサー２１ｃ上に設けられる。シート材部２４に
おいてドーム２４ａの近傍には小丸状の凹部２４
ｃ、２４c′が２ケ所設けられているが、これは第
１図に示すスペーサー４に替わるものであり、押
釦２１ａに充分な接作ストロークを与えるための
ものである。 In FIG. 3, a dome 24a is provided on a sheet member 24 made of resin such as polyester, and a hole 24b is bored in the center of the dome 24a.
The push button 21a made of resin is fixed to the sheet 24 by providing an operating portion 21b that penetrates the hole 24b. A hole 24c is further drilled in the sheet 14, a resin spacer 21c is placed above the hole 24c, and a positioning boss 2 is placed below the hole 24c.
1b is integrally molded. A movable contact 22 is fixed to the lower part of the actuating portion 21b to constitute the push button unit 20. A substrate 23 having a fixed contact 23b is provided below the movable contact 22, and a push button 21a
When pressed, the actuating portion 21b begins to push the movable contact 22 downward. At this time, when the dome 24a of the sheet member 24 is subjected to a load exceeding a certain level, it causes an avalanche phenomenon and is suddenly bent, and the movable contact 22 descends and contacts the fixed contact 23b on the substrate 23 to form a circuit. At this time, it gives a very good feeling of operation to the fingers. Note that the board 23 has a positioning hole 23.
There is a boss 2 for positioning the push button unit 20.
1d fits into the fixed contact 23b and the movable contact 2.
Position between 2. Furthermore, the panel 6 is provided on the spacer 21c. In the sheet material portion 24, a small round recess 24 is provided near the dome 24a.
There are two spacers 24c and 24c', which replace the spacer 4 shown in FIG. 1, and are intended to provide a sufficient engagement stroke to the push button 21a.
従つて第３図の構成によれば、押釦２１ａ、ド
ーム２１ａ可動接点２２、スペーサー２１Ｃが押
釦ユニツト２０として一体的に設けられるので、
組立性、アフターサービス性が良く、第１図に示
すツバ２ｂが不要なので薄型化が計れ、しかも操
作感触が良い。 Therefore, according to the configuration shown in FIG. 3, the push button 21a, the movable contact 22 of the dome 21a, and the spacer 21C are integrally provided as the push button unit 20.
It is easy to assemble and provide good after-sales service, and since the collar 2b shown in FIG. 1 is not required, it can be made thinner and has a good operating feel.
次に押釦ユニツト２０の製造方法について述べ
る。第４に示すのは金型１００である。第１のブ
ロツク１０１と第２のブロツク１０２との間には
ポリエステル等の樹脂製シート部材２４がはさみ
込まれる。 Next, a method for manufacturing the push button unit 20 will be described. The fourth thing shown is the mold 100. A sheet member 24 made of resin such as polyester is sandwiched between the first block 101 and the second block 102.
またシート部材２４には穴２４ｂ，２４ｃが予
めあけられている。第３のブロツク１０３の入口
１０３ａからは加熱溶融した樹脂が注入される
が、第１のブロツク１０１の凹部１０１ａ，１０
１ｂに注入された樹脂はそれぞれ穴２４ａを介し
て押釦２１ａ、スペーサー２１ｃになり、第２の
ブロツク１０２に設けられた凹部１０２ａ，１０
２ｂは穴２４ｃを介してそれぞれ作動部２１ｂ、
位置決め用ボス２１ｄになつて押釦ユニツト２０
を構成する。冷却が完了し、樹脂が固化すると押
釦ユニツト２０は金型１００から取り出される
が、この時はまだ第５図に示すように、樹脂製の
シート部材２４は平板状である。 Further, holes 24b and 24c are pre-drilled in the sheet member 24. Heat-molten resin is injected from the inlet 103a of the third block 103, but the recesses 101a, 10 of the first block 101
The resin injected into 1b becomes the push button 21a and the spacer 21c through the hole 24a, respectively, and then enters the recesses 102a and 10 provided in the second block 102.
2b is connected to the operating portion 21b through the hole 24c, respectively.
The push button unit 20 becomes the positioning boss 21d.
Configure. When the cooling is completed and the resin is solidified, the push button unit 20 is taken out from the mold 100, but at this time the resin sheet member 24 is still in the shape of a flat plate, as shown in FIG.
尚、この成形加工時において加熱溶融状態の樹
脂がシート部材２４を加熱することにより押釦２
１ａと樹脂シート２４が溶け合つて接着しないた
めに、シート部材２４の表面には離型剤がスプレ
ー塗布されたり、あるいは加熱溶融状態の樹脂に
はナイロンやポリカーボネートのようにポリエス
テルの樹脂シートとは溶け合わない樹脂材料が選
定される。即ち押釦２１ａとシート部材２４は接
着するのでなく、あくまでも形状的に係止されて
いるだけである。尚、シート部材２４は金型１０
０のピン１０２ｄにより位置決めされる。 Note that during this molding process, the heated and molten resin heats the sheet member 24, so that the push button 2
In order to prevent 1a and the resin sheet 24 from melting and adhering, a release agent may be sprayed onto the surface of the sheet member 24, or a resin sheet of polyester such as nylon or polycarbonate may be used to heat and melt the resin. A resin material that does not melt together is selected. That is, the push button 21a and the sheet member 24 are not bonded together, but are merely locked in shape. Note that the sheet member 24 is attached to the mold 10.
0 pin 102d.
次に平板状のシート部材２４にドーム２４ａの
成形加工を行なう。第６図に示すのは圧空成形機
２００である。まず第１工程としてシート部材２
４を第２の型２０１にセツトし、下側容器２０３
に上蓋２０２を閉じる。この時型２０１は通気性
を有するように、細かい縦方向に貫通する穴が設
けられるか、又は、型２０１自体が通気性を有す
る発泡性樹脂材料等により作られており下側容器
２０３に固定されている。第２工程としてヒータ
ー２０４に通電してシート部材２４を加熱し軟化
させる。この時のシートの加熱温度は約190℃以
上であるが、押釦２１ａのスペーサー２１ｃ等の
成形済みの樹脂を溶かして変形させる程までは温
度が上昇しないように制御される。加熱が完了す
ると、第３工程として、圧縮機２０５と真空ポン
プ２０６が作動してシート部材２４を型２０１の
形状にそつて成形する。このとき型２０１の突起
部２０１ａによりシート部材２４にはドーム２４
ａが成形される。第４工程では上蓋２０２が開い
て上昇し、切替弁２０７がブロワー２０８側に切
り替わると共に、ヒーター２０４と圧縮機２０５
は止つて代わりにブロワー２０７から冷たい空気
が多量に送り込まれ、シート部材２４は冷却され
る。第５工程でブロワー２０７と真空ポンプ２０
６の運転が停止し、成形の完了した押釦ユニツト
２０は圧空成形機２００の型２０１から取り出さ
れる。その後作動部２１には例えばシリコンゴム
系の接着剤に銀粉を混入した接点材料を塗布して
可動接点２２を設けて押釦ユニツト２０は完成す
る。 Next, a dome 24a is formed on the flat sheet member 24. A pressure forming machine 200 is shown in FIG. First, as the first step, the sheet member 2
4 into the second mold 201, and the lower container 203
Close the top lid 202. At this time, the mold 201 is provided with fine holes passing through it in the vertical direction so as to have air permeability, or the mold 201 itself is made of a foamed resin material or the like that has air permeability and is fixed to the lower container 203. has been done. As a second step, the heater 204 is energized to heat and soften the sheet member 24. The heating temperature of the sheet at this time is approximately 190° C. or higher, but the temperature is controlled so as not to rise to the extent that it melts and deforms the molded resin such as the spacer 21c of the push button 21a. When heating is completed, the compressor 205 and the vacuum pump 206 are operated to mold the sheet member 24 into the shape of the mold 201 in a third step. At this time, the dome 24 is attached to the sheet member 24 by the projection 201a of the mold 201.
a is formed. In the fourth step, the upper lid 202 opens and rises, the switching valve 207 switches to the blower 208 side, and the heater 204 and compressor 205
Instead, a large amount of cold air is blown in from the blower 207, and the sheet member 24 is cooled. In the fifth step, the blower 207 and vacuum pump 20
6 is stopped, and the molded push button unit 20 is taken out from the mold 201 of the air pressure molding machine 200. Thereafter, a contact material made of a silicone rubber adhesive mixed with silver powder is applied to the operating portion 21 to provide a movable contact 22, thereby completing the push button unit 20.
次に第７図に基づいて押釦ユニツト２０の別の
製造方法について説明する。 Next, another method of manufacturing the push button unit 20 will be explained based on FIG.
樹脂製のシート部材２４は図示しないプレス機
械や加熱圧縮成形機等によりあらかじめドーム２
４ａが成形されている。更にドーム２４ａには穴
２４ｂがあけられているので、押釦２１ａは作動
部２１ａを熱溶着、または超音波溶着等により溶
着かしめて固着される。位置決め用ボス２１ｄも
同様に溶着かしめされて、さらに上記と同様に可
動接点が塗布されて押釦ユニツトは完成する。 The resin sheet member 24 is formed into the dome 2 in advance using a press machine, a heating compression molding machine, etc. (not shown).
4a is molded. Furthermore, since the dome 24a has a hole 24b, the push button 21a is fixed by welding and caulking the operating portion 21a by heat welding, ultrasonic welding, or the like. The positioning boss 21d is similarly welded and caulked, and a movable contact is applied in the same manner as above to complete the push button unit.
尚、第８図に本発明キーボードスイツチの他の
実施例を示す。第８図においては可動接点３２ｂ
はシート３２ａに例えばエポキシ系接着剤に銀粉
を粉入した接点材料を8μほどの厚さに印刷して
設けられ、スペーサー３１上に支持される。スペ
ーサー３１には穴３１ａがあけられているので押
釦２１ａを押すと可動接点３２ｂは基板３上の固
定接点３ｂに接して回路を形成する。第８図にお
いては押釦２１ａの作動部２１ｂには可動接点を
塗布する必要がない。 Incidentally, FIG. 8 shows another embodiment of the keyboard switch of the present invention. In FIG. 8, the movable contact 32b
is provided on the sheet 32a by printing a contact material made of, for example, epoxy adhesive with silver powder added to a thickness of about 8 μm, and is supported on the spacer 31. Since the spacer 31 has a hole 31a, when the push button 21a is pressed, the movable contact 32b contacts the fixed contact 3b on the substrate 3 to form a circuit. In FIG. 8, there is no need to apply a movable contact to the operating portion 21b of the push button 21a.
以上のように本発明によれば、樹脂シートのス
ペーサを基板の位置決め用穴に挿入することによ
り、操作感触の良いキーボードを精度良く、かつ
優れた組立性で製造することができる。 As described above, according to the present invention, by inserting the resin sheet spacer into the positioning hole of the board, it is possible to manufacture a keyboard with good operating feel with high precision and excellent assemblability.
第１図は従来例の断面図、第２図は別の従来例
の断面図、第３図は本発明の一実施例におけるキ
ーボードスイツチの断面図、第４〜６図は同実施
例の押釦ユニツトの第１の製造方法の説明図、第
７図は同第２の製造方法の説明図、第８図は他の
実施例の断面図を示す。
２０……押釦ユニツト、２２……可動接点、２
３……基板、２３ｂ……固定接点、２４……樹脂
製のシート部材、２４ａ……ドーム、２４ｂ……
穴、３２ｂ……可動接点、１０１……第一ブロツ
ク、１０１ａ……凹部、１０２……第二ブロツ
ク、１０２ａ……凹部、２０１……型。
Fig. 1 is a sectional view of a conventional example, Fig. 2 is a sectional view of another conventional example, Fig. 3 is a sectional view of a keyboard switch according to an embodiment of the present invention, and Figs. 4 to 6 are push buttons of the same embodiment. FIG. 7 is an explanatory diagram of the first manufacturing method of the unit, FIG. 7 is an explanatory diagram of the second manufacturing method, and FIG. 8 is a sectional view of another embodiment. 20...Push button unit, 22...Movable contact, 2
3... Board, 23b... Fixed contact, 24... Resin sheet member, 24a... Dome, 24b...
Hole, 32b...movable contact, 101...first block, 101a...recess, 102...second block, 102a...recess, 201...mold.
Claims (1)
部に対向する位置に第二凹部を有する第二ブロツ
クとの間に前記両凹部の径よりも小なる径の穴を
設けた樹脂シートを挿入し、この穴を第一凹部と
第二凹部との間に配置し、型締めを行なつた後、
前記両凹部に、加熱された溶融状態の樹脂材料を
注入して押釦ならびにスペーサを形成し、次に突
起を設けた金型に前記押釦ならびにスペーサを形
成した樹脂シートを載置し、前記押釦が前記突起
部の先端に一致するよう配置し、その後前記樹脂
シートを加熱し、前記金型に密着させて樹脂シー
トに突起を設け、更にこの樹脂シートのスペーサ
を固定接点を有した基板の位置決め用のボスに挿
入するとともに前記押釦の下に可動接点を設ける
キーボードスイツチの製造方法。1. A resin sheet having a hole with a diameter smaller than the diameter of both of the recesses is inserted between a first block having a first recess and a second block having a second recess at a position opposite to the first recess. After placing this hole between the first recess and the second recess and clamping the mold,
A heated molten resin material is injected into both of the recesses to form a push button and a spacer, and then the resin sheet with the push button and spacer formed thereon is placed on a mold provided with protrusions, so that the push button is The resin sheet is placed so as to match the tip of the protrusion, and then the resin sheet is heated and brought into close contact with the mold to provide a protrusion on the resin sheet, and a spacer of this resin sheet is used for positioning a board having a fixed contact. A method of manufacturing a keyboard switch which is inserted into the boss of the keyboard and has a movable contact under the push button.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9201880A JPS5717518A (en) | 1980-07-04 | 1980-07-04 | Keyboard switch and method of producing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9201880A JPS5717518A (en) | 1980-07-04 | 1980-07-04 | Keyboard switch and method of producing same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5717518A JPS5717518A (en) | 1982-01-29 |
| JPH0145689B2 true JPH0145689B2 (en) | 1989-10-04 |
Family
ID=14042785
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9201880A Granted JPS5717518A (en) | 1980-07-04 | 1980-07-04 | Keyboard switch and method of producing same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5717518A (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58180495U (en) * | 1982-05-27 | 1983-12-02 | リズム時計工業株式会社 | clock alarm switch |
| JPS6087125U (en) * | 1983-11-15 | 1985-06-15 | 信越ポリマー株式会社 | rubber switch parts |
| US4923775A (en) * | 1988-12-23 | 1990-05-08 | Xerox Corporation | Photoreceptor overcoated with a polysiloxane |
| JP2009152119A (en) * | 2007-12-21 | 2009-07-09 | Alps Electric Co Ltd | Reverse spring for switch, and switch device which has reverse spring for switch |
| EP2266126A1 (en) * | 2008-04-14 | 2010-12-29 | EAO Holding AG | Pushbutton |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49132738U (en) * | 1973-03-14 | 1974-11-14 | ||
| JPS5322067U (en) * | 1976-08-05 | 1978-02-24 | ||
| JPS5399572U (en) * | 1977-01-18 | 1978-08-11 |
-
1980
- 1980-07-04 JP JP9201880A patent/JPS5717518A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5717518A (en) | 1982-01-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100362027B1 (en) | Keytop plate and method for producing the same | |
| KR100602431B1 (en) | method of producing control panel for electronic equipment | |
| JP4037483B2 (en) | Sheet key top and manufacturing method thereof | |
| JP4413892B2 (en) | Key sheet | |
| KR100342959B1 (en) | Keypad for cellular phone and method of manufacturing same | |
| EP1024510B1 (en) | Control panel having sheet-formed pushbutton unit and method of producing the same | |
| JPS5913813B2 (en) | Keyboard assembly and its manufacturing method | |
| JPH0145689B2 (en) | ||
| JPH09259697A (en) | Switching seat structure for electronic equipment | |
| WO2007018256A1 (en) | Thin key sheet and process for production thereof | |
| JP2681064B2 (en) | Control panel including push button and method of manufacturing the same | |
| JPH04305418A (en) | Push button and preparation thereof | |
| JP2001126577A (en) | Control panel having sheet molding press button and mehtod of manufacturing it | |
| JPH09259696A (en) | Switching seat structure for electronic equipment | |
| JPH11288632A (en) | Manufacture of key pad | |
| JP3802736B2 (en) | Pushbutton sheet member | |
| JP3409000B2 (en) | Control panel for electronic equipment and method of manufacturing the same | |
| JPH069878B2 (en) | Operation button and its manufacturing method | |
| JP2000285762A (en) | Control panel equipped with molded-sheet push bottom unit and manufacture thereof | |
| JP2002197933A (en) | Key top, key sheet and manufacturing method therefor | |
| JP2002184255A (en) | Method for molding push button unit | |
| JPS637474B2 (en) | ||
| KR100685142B1 (en) | Keypad for cellular phone and manufacturing method thereof | |
| JP4628553B2 (en) | Pushbutton unit and manufacturing method thereof | |
| JPS5914988Y2 (en) | push button switch device |