JPH0684425A - Pushbutton switch - Google Patents

Pushbutton switch

Info

Publication number
JPH0684425A
JPH0684425A JP4233792A JP23379292A JPH0684425A JP H0684425 A JPH0684425 A JP H0684425A JP 4233792 A JP4233792 A JP 4233792A JP 23379292 A JP23379292 A JP 23379292A JP H0684425 A JPH0684425 A JP H0684425A
Authority
JP
Japan
Prior art keywords
key top
housing
leg piece
support plate
leg
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.)
Granted
Application number
JP4233792A
Other languages
Japanese (ja)
Other versions
JP3139580B2 (en
Inventor
Yasuhide Oda
泰秀 織田
Hiroshi Shigetaka
寛 重高
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Alps Alpine Co Ltd
Original Assignee
Alps Electric Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Alps Electric Co Ltd filed Critical Alps Electric Co Ltd
Priority to JP04233792A priority Critical patent/JP3139580B2/en
Priority to TW082102920A priority patent/TW367513B/en
Publication of JPH0684425A publication Critical patent/JPH0684425A/en
Priority to US08/390,266 priority patent/US5488210A/en
Application granted granted Critical
Publication of JP3139580B2 publication Critical patent/JP3139580B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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  • Push-Button Switches (AREA)

Abstract

PURPOSE:To provide a pushbutton switch ensuring suitability to thin type design application, inexpensive production and good assembly workability. CONSTITUTION:A synthetic resin housing 22 placed on a support plate 15 is provided with leg piece storage holes 22b and 22c, and engagement recesses 22d and 22e communicated therewith and open to the support plate 15. Also, engagement projections 29a and 32a formed on the ends of leg pieces 29 and 32 for holding a key top 23 in such a way as capable of free elevation are inserted in the holes 22b and 22c for engagement with the recesses 22d and 22e, thereby enabling the leg pieces 29 and 32 to be housed in the holes 22b and 22c at the lowest stroke point of the key top 23.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、キーボード入力装置の
キースイッチなどとして用いられる押釦スイッチに係
り、特に薄型化に好適な押釦スイッチに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button switch used as a key switch of a keyboard input device, and more particularly to a push button switch suitable for thinning.

【0002】[0002]

【従来の技術】図8は、実開平3−64434号公報な
どに開示されたこの種の押釦スイッチの従来例を示す断
面図である。同図において、符号1は金属板等の硬質材
料からなる支持板で、この支持板1上には合成樹脂製の
ハウジング2が載置されており、該ハウジング2の上面
には鉤形のガイド部3が一体成形されている。前記ハウ
ジング2の上方にはキートップ4が配置され、該キート
ップ4は下端部に可動接点(図示せず)を固設したスラ
イダ5の上端に嵌着され、ハウジング2に対して上下動
するようになっている。また、前記スライダ5にはコイ
ルスプリング6が巻回され、このコイルスプリング6は
前記キートップ4を上方へ付勢する働きをしている。符
号7は脚片であり、該脚片7の上端部7aは前記キート
ップ4の裏面前部に形成した保持部8に回動自在に保持
されており、一方、脚片7の下端部7bは前記ガイド部
3にスライド可能に挿入されている。
2. Description of the Related Art FIG. 8 is a sectional view showing a conventional example of a push button switch of this type disclosed in Japanese Utility Model Laid-Open No. 3-64434. In FIG. 1, reference numeral 1 is a support plate made of a hard material such as a metal plate, and a housing 2 made of synthetic resin is placed on the support plate 1, and a hook-shaped guide is provided on the upper surface of the housing 2. The part 3 is integrally molded. A key top 4 is arranged above the housing 2, and the key top 4 is fitted to the upper end of a slider 5 having a movable contact (not shown) fixed to the lower end and moves up and down with respect to the housing 2. It is like this. A coil spring 6 is wound around the slider 5, and the coil spring 6 serves to urge the key top 4 upward. Reference numeral 7 is a leg piece, and an upper end portion 7a of the leg piece 7 is rotatably held by a holding portion 8 formed on a front portion of the back surface of the key top 4, while a lower end portion 7b of the leg piece 7 is held. Is slidably inserted in the guide portion 3.

【0003】このように構成された押釦スイッチにおい
て、キートップ4の天面を押圧すると、それに連動して
スライダ5が下降し、該スライダ5の下端部に設けた可
動接点が支持板1に設けた固定接点(いずれも図示せ
ず)と接触してスイッチオンとなる。その際、前記脚片
7は、キートップ4の保持部8に保持されている上端部
7aを回動支点として図8の反時計方向へ回動すると共
に、下端部7bがガイド部3に沿って図8の矢印X方向
へスライドする。また、前記キートップ4への上記押圧
力を解除すると、該キートップ4は前記コイルスプリン
グ6の弾性により上方へ移動すると共に、前記スライダ
5も上方へ移動し、可動接点が固定接点から離間してス
イッチオフとなる。その際、脚部7は上端部7aを回動
支点として図8の時計方向へ回動すると共に、下端部7
bがガイド部3に沿って図8の矢印Y方向へスライド
し、図8に示す初期状態に復帰する。
In the push-button switch having such a structure, when the top surface of the key top 4 is pressed, the slider 5 is lowered in conjunction therewith, and the movable contact provided at the lower end of the slider 5 is provided on the support plate 1. The fixed contacts (not shown) are contacted to turn on the switch. At that time, the leg piece 7 rotates counterclockwise in FIG. 8 with the upper end portion 7a held by the holding portion 8 of the key top 4 as a rotation fulcrum, and the lower end portion 7b extends along the guide portion 3. Slide in the direction of arrow X in FIG. When the pressing force on the key top 4 is released, the key top 4 moves upward due to the elasticity of the coil spring 6, and the slider 5 also moves upward, so that the movable contact is separated from the fixed contact. Switch off. At that time, the leg portion 7 rotates in the clockwise direction in FIG.
b slides along the guide portion 3 in the direction of the arrow Y in FIG. 8 and returns to the initial state shown in FIG.

【0004】[0004]

【発明が解決しようとする課題】ところで、キーボード
入力装置に組み込まれる押釦スイッチに対しては、装置
の薄型化に伴って近時ますます薄型化の要望が高まって
おり、併せて操作性の良いものが求められるようになっ
てきている。
By the way, with regard to pushbutton switches incorporated in a keyboard input device, there is a growing demand for thinner devices as the devices become thinner, and in addition, good operability is achieved. Things are becoming more demanding.

【0005】しかし、上述した従来の押釦スイッチにお
いては、ハウジング2の上面に脚片7の下端部7bを案
内する鉤状のガイド部3を突出成形しているため、該ガ
イド部3の突出量に起因して押釦スイッチを薄型にする
ことに限界があった。加えて、合成樹脂製のハウジング
2上に鉤形のガイド部3を一体成形するためには、アン
ダーカット法による複雑な金型を用いなければならず、
製造コストが高騰するという問題があった。さらに、組
み立てに際しては、脚片7の上端部7aをキートップ4
の保持部8に取付けた後、この状態を保持したまま脚片
7の下端部7bをガイド部3の狭い空間内に押し込まな
ければならず、かかる作業は立体的な障害が多いばかり
でなく、コイルスプリング6の弾性に抗して行う必要が
あるため、組立作業性が悪いという問題もあった。
However, in the above-described conventional push button switch, since the hook-shaped guide portion 3 for guiding the lower end portion 7b of the leg piece 7 is formed on the upper surface of the housing 2 by protrusion, the protrusion amount of the guide portion 3 is increased. Due to this, there is a limit to making the push button switch thin. In addition, in order to integrally form the hook-shaped guide portion 3 on the synthetic resin housing 2, a complicated mold by the undercut method must be used,
There is a problem that the manufacturing cost rises. Further, when assembling, the upper end 7a of the leg piece 7 is attached to the key top 4
After being attached to the holding portion 8 of the above, the lower end portion 7b of the leg piece 7 must be pushed into the narrow space of the guide portion 3 while keeping this state, and such work not only has many three-dimensional obstacles, Since it is necessary to resist the elasticity of the coil spring 6, there is a problem that assembly workability is poor.

【0006】本発明は、かかる従来技術の実情に鑑みて
なされたもので、その目的は、薄型化に適し、安価で組
立作業の良好な押釦スイッチを提供することにある。
The present invention has been made in view of the circumstances of the prior art, and an object thereof is to provide a push button switch which is suitable for thinning, is inexpensive, and is excellent in assembling work.

【0007】[0007]

【課題を解決するための手段】上記目的を達成するため
に本発明は、支持板と、この支持板上に載置された合成
樹脂製のハウジングと、このハウジングに脚片を介して
昇降自在に支持されたキートップと、このキートップを
上方へ付勢する弾性部材と、前記キートップの昇降によ
って接点の切り換えが行われるスイッチ素子とを備え、
前記脚片の一端を前記キートップの裏面に回転自在に係
合し、他端を前記ハウジングにスライド自在に係合した
押釦スイッチにおいて、前記ハウジングに前記脚片を収
納可能な脚片収納孔を穿設すると共に、この脚片収納孔
に連通し前記支持板側が開口された係合凹部を設け、前
記脚片の他端に設けた係合突起を前記係合凹部と前記支
持板との間にスライド可能に係合したことを特徴とす
る。
In order to achieve the above object, the present invention provides a support plate, a housing made of synthetic resin mounted on the support plate, and movable up and down via leg pieces on the housing. A key top supported by, an elastic member for urging the key top upward, and a switch element for switching contacts by raising and lowering the key top,
In a push button switch in which one end of the leg piece is rotatably engaged with the back surface of the key top and the other end is slidably engaged with the housing, a leg piece accommodation hole capable of accommodating the leg piece is provided in the housing. An engaging recess is provided which is communicated with this leg piece accommodation hole and is opened on the side of the support plate, and an engaging projection provided on the other end of the leg piece is provided between the engaging recess and the support plate. Is slidably engaged with.

【0008】[0008]

【作用】上記手段によれば、脚片の係合突起をスライド
方向に案内するガイド部がハウジングに凹状に設けら
れ、しかもキートップの下降時に、脚片をハウジングの
脚片収納孔内に納めることができるため、押釦スイッチ
全体の高さ寸法を小さくすることができる。また、ハウ
ジングを単純形状にすることができるため、ハウジング
の成形が非常に容易となり、さらに、脚片収納孔に脚片
を挿入することによって、脚片の係合突起をハウジング
の係合凹部に簡単に取付けことができるため、組立作業
性が良好となる。
According to the above means, the guide portion for guiding the engaging projection of the leg piece in the sliding direction is provided in the housing in a concave shape, and the leg piece is housed in the leg piece accommodating hole of the housing when the key top is lowered. Therefore, the height dimension of the entire push button switch can be reduced. In addition, since the housing can be made into a simple shape, the molding of the housing becomes very easy. Furthermore, by inserting the leg piece into the leg piece accommodation hole, the engaging projection of the leg piece becomes the engaging concave portion of the housing. Since it can be easily attached, the assembly workability is improved.

【0009】[0009]

【実施例】以下、本発明の実施例を図に基づいて説明す
る。図1は本発明の一実施例に係る押釦スイッチのオフ
状態の断面図、図2は該押釦スイッチのオン状態の断面
図、図3は該押釦スイッチに備えられるハウジングの平
面図、図4は該ハウジングの側面図、図5は図1の押釦
スイッチに組み込まれるキートップ保持体の斜視図、図
6は該キートップ保持体の分解斜視図、図7(a)〜
(d)は該キートップ保持体の動作説明図である。
Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view of a push button switch according to an embodiment of the present invention in an off state, FIG. 2 is a sectional view of the push button switch in an on state, FIG. 3 is a plan view of a housing provided in the push button switch, and FIG. FIG. 7 is a side view of the housing, FIG. 5 is a perspective view of a keytop holder incorporated in the push button switch of FIG. 1, FIG. 6 is an exploded perspective view of the keytop holder, and FIGS.
(D) is an operation explanatory view of the key top holder.

【0010】図1,2において、符号15は金属板等の
硬質材料からなる支持板を示し、この支持板15上には
メンブレンスイッチ16が載置されている。このメンブ
レンスイッチ16は、可撓性を有する上部シート17の
下面に設けた可動接点18を、下部シート19の上面に
設けた固定接点20に対向せしめ、かつ両シート17,
19間にスペーサ21を介設してなるスイッチ素子であ
る。また、前記支持板15上には前記メンブレンスイッ
チを介して合成樹脂製のハウジング22が載置されてい
る。
1 and 2, reference numeral 15 indicates a support plate made of a hard material such as a metal plate, and a membrane switch 16 is mounted on the support plate 15. In this membrane switch 16, the movable contact 18 provided on the lower surface of the flexible upper sheet 17 is made to face the fixed contact 20 provided on the upper surface of the lower sheet 19, and both sheets 17,
It is a switch element in which a spacer 21 is provided between 19 pieces. A housing 22 made of synthetic resin is mounted on the support plate 15 via the membrane switch.

【0011】図3,4に示すように、このハウジング2
2には、前記可動接点18の上方に位置する開口部22
aと、この開口部22aを介して対向する一対の脚片収
納孔22b,22cがそれぞれ穿設されている。さら
に、前記ハウジング22の裏面には前記支持板15側を
開口した2つの係合凹部22dと2つの係合凹部22e
とがそれぞれ形成されており、これらのうち両係合凹部
22dは前記脚片収納孔22b,22cのそれぞれの外
壁に連通し、両係合凹部22eは前記脚片収納孔22
b,22cのそれぞれの内壁に連通している。
As shown in FIGS. 3 and 4, this housing 2
2 includes an opening 22 located above the movable contact 18.
A and a pair of leg piece storage holes 22b and 22c facing each other through the opening 22a are formed. Further, on the back surface of the housing 22, two engaging recesses 22d and two engaging recesses 22e that are open on the side of the support plate 15 are provided.
And the engaging recesses 22d communicate with the outer walls of the leg piece accommodating holes 22b and 22c, and the engaging recesses 22e form the leg accommodating hole 22.
It communicates with each inner wall of b and 22c.

【0012】図1,2に戻り、前記ハウジング22上に
はクリックゴム24が載置されている。このクリックゴ
ム24は、座屈変形が可能なスカート状の側壁部24a
と、この側壁部24aによって支持された駆動部24b
とを有する公知のもので、側壁部24aの座屈時にクリ
ック感を生起するようになっている。そして、クリック
ゴム24の側壁部24aをハウジング22の前記開口部
22aの周囲に載置することにより、クリックゴム24
の駆動部24bを可動接点18の上方に位置させてい
る。また、符号25は合成樹脂製のキートップ保持体
で、このキートップ保持体25は図5,6に示すよう
に、略E字形のリンク部材26と、略U字形のリンク部
材27とを組み合わせて構成されている。
Returning to FIGS. 1 and 2, a click rubber 24 is placed on the housing 22. The click rubber 24 has a skirt-shaped side wall portion 24a that can be buckled and deformed.
And the drive portion 24b supported by the side wall portion 24a
It is a well-known type having a structure that produces a click feeling when the side wall portion 24a buckles. Then, by placing the side wall portion 24 a of the click rubber 24 around the opening 22 a of the housing 22, the click rubber 24
The driving portion 24b of the above is positioned above the movable contact 18. Further, reference numeral 25 is a synthetic resin key top holder, and this key top holder 25 is a combination of a substantially E-shaped link member 26 and a substantially U-shaped link member 27 as shown in FIGS. Is configured.

【0013】ここで、一方のリンク部材26は、キート
ップ23の裏面片側を支持・固定するための支持軸28
の両端から、先端部に外向きの係合突起29aを有し略
中央部には内向きの連結ピン29bを有する一対の外部
脚片29を平行に延設し、かつ支持軸28の中央から、
外部脚片29よりも短い操作片30を延設してなるもの
で、この操作片30は板厚方向の外力に対して若干の可
撓性を有する弾性片であって、キートップ保持体25を
ハウジング22に組み込むと、この操作片30の先端部
がクリックゴム24の駆動部24bの天面に常時弾接す
るようになっている。また、他方のリンク部材27は、
キートップ23の裏面他側を支持・固定するための支持
軸31の両端から上記外部脚片29に対し平行かつ内側
で交差する向きに、先端部に内向きの係合突起32aを
有し略中央部には略ハート形の長孔32bを有する一対
の内部脚片32を延設してなるもので、長孔32bの上
部の傾斜面32cを利用したスナップインによって各長
孔32b内にそれぞれ上記連結ピン29bを遊挿し、対
応する外部脚片29と内部脚片32とを連結ピン29b
が長孔32bに沿って移動自在となるように連結するこ
とにより、両リンク部材26,27を一体化してキート
ップ保持体25となしている。したがって、このキート
ップ保持体25は、キートップ23に押圧操作力を付与
して両リンク部材26,27の支持軸28,31を下方
へ押し込んでいくと、図7(a)〜(d)に示すよう
に、略X字形に交差して連結されている外部脚片29お
よび内部脚片32がキートップ23側から見て次第に交
差する角度を増していき、キートップ保持体25の高さ
寸法が漸次減少するように両リンク部材26,27を折
り畳んでいくことができる。
Here, one link member 26 is a support shaft 28 for supporting and fixing one side of the back surface of the key top 23.
From both ends of the support shaft 28, a pair of external leg pieces 29 having outwardly engaging projections 29a at their tips and inwardly connecting pins 29b at their substantially central portions are extended in parallel, and from the center of the support shaft 28. ,
The operation piece 30 is shorter than the outer leg piece 29, and the operation piece 30 is an elastic piece having a little flexibility against an external force in the plate thickness direction. When the above is incorporated in the housing 22, the tip end portion of the operation piece 30 is always in elastic contact with the top surface of the drive portion 24b of the click rubber 24. The other link member 27 is
The support shaft 31 for supporting and fixing the other side of the back surface of the key top 23 is provided with an inward engaging projection 32a at its tip end in a direction parallel to and intersecting with the outer leg piece 29 from both ends thereof. A pair of internal leg pieces 32 each having a substantially heart-shaped elongated hole 32b are provided in the central portion, and each of the elongated holes 32b is snap-in using the upper inclined surface 32c of the elongated hole 32b. The connecting pin 29b is loosely inserted to connect the corresponding outer leg piece 29 and inner leg piece 32 to the connecting pin 29b.
By linking so as to be movable along the long hole 32b, the link members 26 and 27 are integrated to form the keytop holding body 25. Therefore, when the key-top holding body 25 applies a pressing operation force to the key-top 23 and pushes the support shafts 28 and 31 of both the link members 26 and 27 downward, the key-top holding bodies 25 are shown in FIGS. As shown in FIG. 5, the angle at which the outer leg piece 29 and the inner leg piece 32, which are crossed and connected in a substantially X shape, are gradually increased as viewed from the keytop 23 side, and the height of the keytop holding body 25 is increased. Both link members 26 and 27 can be folded so that the dimensions gradually decrease.

【0014】ただし、このキートップ保持体25は、外
側のリンク部材26の支持軸28に内側のリンク部材2
7の内部脚片32が当接しないように寸法設定してあ
り、具体的には、長孔32bから支持軸28までの距離
Dを該長孔32bから内部脚片32の先端までの長さL
よりも大きく設定してある(図7参照)。したがって、
両リンク部材26,27を、外部脚片29および内部脚
片32が真横に倒れるまで折り畳むことができる。
However, the key-top holder 25 has a support shaft 28 of an outer link member 26 and a link shaft 2 of the inner link member 2.
The dimension is set so that the inner leg pieces 32 of No. 7 do not come into contact with each other. Specifically, the distance D from the long hole 32b to the support shaft 28 is the length from the long hole 32b to the tip of the inner leg piece 32. L
Is set larger than that (see FIG. 7). Therefore,
Both link members 26, 27 can be folded until the outer leg piece 29 and the inner leg piece 32 fall to the side.

【0015】そして、このキートップ保持体25をハウ
ジング22に取り付ける際には、両外部脚片29をハウ
ジング22の表側から脚片収納孔22b,22cに挿入
し、外部脚片29の先端に設けた外向きの係合突起29
aをハウジング22の裏側に設けた係合凹部22dに挿
入するとともに、両内部脚片32をハウジング22の表
側から脚片収納孔22b,22cに挿入し、内部脚片3
2の先端に設けた内向きの係合突起32aをハウジング
22の裏側に設けた係合凹部22eに挿入する。しかる
後、メンブレンスイッチ16を搭載した支持板15上に
前記ハウジング22を載置し、これらを一体化する。こ
れにより、ハウジング22の各係合凹部22d,22e
の開口が支持板15で塞がれ、キートップ保持体25の
各係合突起29a,32aはそれぞれ係合凹部22d,
22eにスライド自在に係合・保持されることになり、
外部脚片29と内部脚片32がハウジング22に位置規
制される。また、こうしてキートップ保持体25をハウ
ジング22に組み込むと、予めハウジング22に組み込
んでおいたクリックゴム24の駆動部24bが操作片3
0の先端部に弾接するので、この操作片30を介して外
側のリンク部材26の支持軸28が上方へ付勢されると
共に、このリンク部材26の連結ピン29bを介して内
側のリンク部材27の支持軸31も上方へ付勢されるこ
とになる。
When the key top holder 25 is attached to the housing 22, both outer leg pieces 29 are inserted into the leg piece receiving holes 22b and 22c from the front side of the housing 22 and are provided at the tips of the outer leg pieces 29. Outward engaging projection 29
a is inserted into the engagement recess 22d provided on the back side of the housing 22, and both inner leg pieces 32 are inserted into the leg piece accommodation holes 22b and 22c from the front side of the housing 22.
The inward engaging projection 32a provided on the tip of the second member 2 is inserted into the engaging recess 22e provided on the back side of the housing 22. Then, the housing 22 is placed on the support plate 15 on which the membrane switch 16 is mounted, and these are integrated. As a result, the engaging recesses 22d and 22e of the housing 22 are formed.
Is closed by the support plate 15, and the engagement protrusions 29a and 32a of the key top holding body 25 are engaged with the engagement recesses 22d and 22d, respectively.
22e will be slidably engaged and retained on the 22e,
The position of the outer leg piece 29 and the inner leg piece 32 is restricted by the housing 22. Further, when the key top holding body 25 is assembled in the housing 22 in this way, the driving portion 24b of the click rubber 24 previously assembled in the housing 22 becomes the operation piece 3.
Since it is elastically contacted with the tip portion of No. 0, the support shaft 28 of the outer link member 26 is biased upward through the operation piece 30 and the inner link member 27 through the connecting pin 29b of the link member 26. The support shaft 31 is also urged upward.

【0016】上記の如くに構成された押釦スイッチは、
キートップ保持体25の両リンク部材26,27の各支
持軸28,31が、クリックゴム24の弾発力を受けて
キートップ23の裏面の両側を支持することになり、ま
た、両リンク部材26,27の外部脚片29および内部
脚片32を互いの交差する角度が変更自在となるように
連結してあって、しかも各脚片29,32をハウジング
22で位置規制しているので、結局、キートップ23は
ハウジング22に対して傾くことなく昇降自在に保持さ
れることになる。
The push button switch configured as described above is
The support shafts 28 and 31 of the link members 26 and 27 of the key top holder 25 receive the elastic force of the click rubber 24 to support both sides of the back surface of the key top 23. Since the outer leg pieces 29 and the inner leg pieces 32 of 26 and 27 are connected so that the angle at which they intersect each other can be changed, and the position of each leg piece 29, 32 is regulated by the housing 22, After all, the key top 23 is held so as to be able to move up and down without tilting with respect to the housing 22.

【0017】したがって、操作者がキートップ23に押
圧操作力を付与し、両支持軸28,31をクリックゴム
24の弾発力に抗して押し込むと、支持軸28,31が
その場で回転すると共に、各係合突起29a,32aが
係合凹部22d,22e内をスライドし、略X字形に交
差して連結されている外部脚片29および内部脚片32
はキートップ23側から見て次第に交差する角度を増し
ていく。それに伴い操作片30がクリックゴム24の駆
動部24bを下方へ押し込んでいくので、駆動部24b
を所定高さ下降させた時点で、側壁部24aが座屈して
クリック感が生起されると共に、該駆動部24bが勢い
よく押し込まれてメンブレンスイッチ16の上部シート
17に衝突し、その結果、該上部シート17が下方へ撓
んで可動接点18が固定接点20に接触し、図1に示す
オフ状態から図2に示すオン状態への接点の切り換え動
作が行われる。
Therefore, when the operator applies a pressing operation force to the key top 23 and pushes both support shafts 28 and 31 against the elastic force of the click rubber 24, the support shafts 28 and 31 rotate on the spot. At the same time, the engaging projections 29a and 32a slide in the engaging recesses 22d and 22e, and are connected to each other by intersecting in a substantially X-shape.
Gradually increases the angle of intersection when viewed from the key top 23 side. Along with that, the operating piece 30 pushes the drive portion 24b of the click rubber 24 downward, so that the drive portion 24b
When the side wall 24a is lowered by a predetermined height, the side wall 24a buckles and a click feeling is generated, and the driving part 24b is forcedly pushed to collide with the upper sheet 17 of the membrane switch 16. As a result, The upper sheet 17 bends downward and the movable contact 18 comes into contact with the fixed contact 20, and the contact switching operation from the OFF state shown in FIG. 1 to the ON state shown in FIG. 2 is performed.

【0018】また、かかるオン状態で操作者がキートッ
プ23に対する押圧操作力を除去すると、座屈していた
クリックゴム24が自らの弾性で元の形状に復元される
ので、駆動部24bの上昇に伴って操作片30が押し上
げられていき、よって折り畳まれていた両リンク部材2
6,27が起立していきキートップ23が初期位置まで
押し上げられると共に、上部シート17の撓みが解消さ
れて可動接点18が固定接点20から離間し、オフ状態
に戻る。
Further, when the operator removes the pressing operation force on the key top 23 in this ON state, the buckled click rubber 24 is restored to its original shape by its own elasticity, so that the driving portion 24b is raised. Along with this, the operation piece 30 is pushed up, and thus the two link members 2 that have been folded.
6, 27 stand up, the key top 23 is pushed up to the initial position, the bending of the upper sheet 17 is eliminated, the movable contact 18 is separated from the fixed contact 20, and the state returns to the off state.

【0019】このように上記実施例は、リンク部材2
6,27を組み合わせてなるキートップ保持体25を用
いてキートップ23を支持し、該キートップ23の高さ
位置に応じて交差角度が変更自在な両リンク部材26,
27の各脚片29,32を、ハウジング22に設けた各
係合凹部22d,22eで位置規制するというものなの
で、キートップ23をハウジング22に対して水平に昇
降させることができる。
As described above, in the above embodiment, the link member 2
Both link members 26 that support the key top 23 by using a key top holding body 25 that is a combination of 6, 27 and that can change the crossing angle according to the height position of the key top 23,
Since the position of each leg piece 29, 32 of 27 is regulated by each engaging recess 22d, 22e provided in the housing 22, the key top 23 can be moved up and down horizontally with respect to the housing 22.

【0020】また、各係合凹部22d,22eはハウジ
ング22の裏面に凹状に設けられ、しかもキートップ2
3のストローク最下点でリンク部材26,27の脚片2
9,32が収納される脚片収納孔22b,22cをハウ
ジング22に設けてあるので、押釦スイッチの大幅な薄
型化を実現できる。しかも、各係合凹部22d,22e
と脚片収納孔22b,22cはアンダーカット法を用い
ることなく成形できるため、ハウジング22が単純形状
になり、該ハウジング22を成形するための金型を簡略
化してコストダウンを図ることができる。さらに、キー
トップ保持体25をハウジング22に組み込むに際して
は、各脚片29,32を脚片収納孔22b,22cから
挿入して、各係合突起29a,32aを各係合凹部22
d,22eに係合するという簡単な作業にて行うことが
できるため、組立作業性が良好となる。
The engagement recesses 22d and 22e are provided on the back surface of the housing 22 in a recessed shape, and the key top 2 is also provided.
The leg piece 2 of the link members 26 and 27 at the lowest point of the stroke 3
Since the leg piece accommodation holes 22b and 22c for accommodating the 9 and 32 are provided in the housing 22, the push button switch can be significantly thinned. Moreover, the engaging recesses 22d and 22e
Since the leg piece storage holes 22b and 22c can be molded without using the undercut method, the housing 22 has a simple shape, and the die for molding the housing 22 can be simplified to reduce the cost. Further, when the key top holder 25 is assembled into the housing 22, the leg pieces 29 and 32 are inserted through the leg piece storage holes 22b and 22c, and the engagement protrusions 29a and 32a are engaged with the engagement recesses 22.
Since it can be performed by a simple work of engaging with d and 22e, workability in assembling is improved.

【0021】さらに、上記実施例では、内側のリンク部
材27の内部脚片32の先端が外側のリンク部材26の
支持軸28に当接しないように寸法設定してあるので、
両リンク部材26,27を、図7(d)に示すように真
横に倒れるまで折り畳むことができ、そのためキートッ
プ23のストローク最下点を極めて低い位置に設定でき
るという利点があり、押釦スイッチの薄型化を促進する
うえで好都合である。
Further, in the above embodiment, the dimension is set so that the tips of the inner leg pieces 32 of the inner link member 27 do not abut the support shaft 28 of the outer link member 26.
As shown in FIG. 7 (d), both link members 26 and 27 can be folded until they lie down to the side, which has the advantage that the stroke lowest point of the key top 23 can be set to an extremely low position. This is convenient for promoting thinning.

【0022】また、上記実施例で用いたキートップ保持
体25は、両リンク部材26,27の各脚片29,32
の交差部で連結ピン29bを長孔32bに沿ってスライ
ド自在となし、かつ各脚片29,32の先端部の係合突
起29a,32aをハウジング22に対してスライド自
在となすことにより、各脚片29,32の基端側に位置
する2本の支持軸28,31の間隔を一定に保ったま
ま、両リンク部材26,27が折り畳めるようになって
いるので、キートップ23を両支持軸28,31に固定
する支持構造が実現されている。すなわち、例えば各脚
片29,32の交差部を回動中心として両リンク部材2
6,27を折り畳むこともできるが、その場合にはキー
トップ23が両リンク部材26,27に対してスライド
自在な支持構造を採用しなければならず、該キートップ
23の裏面の形状が複雑化したり大形化する虞がある。
しかるに、この実施例のように各脚片29,32の基端
部を横ずれさせることなく両リンク部材26,27が折
り畳めれば、キートップ23はたんに支持軸28,31
に固定できさえすればよいので、図1,2に示す如く該
キートップ23の裏面形状は簡単かつ小形で済み、よっ
て成形性が良好で薄型化にも好適である。なお、キート
ップ23はキートップ保持体25に対してスナップイン
による取付けが行えるので、組立性も良好である。
The key top holder 25 used in the above-described embodiment has the leg pieces 29 and 32 of both link members 26 and 27.
By making the connecting pin 29b slidable along the long hole 32b at the intersecting part of and the engaging projections 29a, 32a of the tip ends of the leg pieces 29, 32 slidable with respect to the housing 22, Since the link members 26 and 27 can be folded while keeping the distance between the two support shafts 28 and 31 located on the base end side of the leg pieces 29 and 32 constant, both the key tops 23 are supported. A support structure for fixing the shafts 28 and 31 is realized. That is, for example, both link members 2 with the intersection of the leg pieces 29 and 32 as the center of rotation.
6, 27 can be folded, but in that case, a support structure in which the key top 23 is slidable with respect to both link members 26, 27 must be adopted, and the shape of the back surface of the key top 23 is complicated. It may become larger or larger.
However, if both link members 26 and 27 can be folded without laterally shifting the base end portions of the leg pieces 29 and 32 as in this embodiment, the key top 23 can simply support shafts 28 and 31.
As shown in FIGS. 1 and 2, the shape of the back surface of the key top 23 is simple and small. Therefore, it has good moldability and is suitable for thinning. Since the key top 23 can be attached to the key top holding body 25 by snap-in, it is easy to assemble.

【0023】さらにまた、上記実施例で用いたキートッ
プ保持体25には、一方のリンク部材26に操作片30
が設けてあり、操作者がキートップ23を押し込んでい
くと該操作片30がクリックゴム24の駆動部24bを
介して可動接点18を押圧駆動するようになっているの
で、キートップ23の裏面からステムを省略し、スイッ
チングに必要な該駆動部24bの下降距離を該キートッ
プ23の作動ストロークよりも小さく設定することが可
能となっている。すなわち、操作片30を有するリンク
部材26は外部脚片29の先端部を可動支点とする回動
を行うが、駆動部24bの天面に弾接する操作片30の
先端部の回動半径は、キートップ23に直接押し込まれ
る支持軸28の回動半径の約半分なので、該駆動部24
bの押し込み量をキートップ23の押し込み量の約半分
で済ますことができ、その結果、操作に伴うクリックゴ
ム24の変形量が少なくなってその寿命が延び、長期に
亘って高信頼性が維持できる。そしてまた、作用点たる
操作片30の先端部の回動半径が、力点たる支持軸28
の回動半径の約半分であることから、てこの原理によ
り、該支持軸28に付与する押圧操作力が小さくても、
該操作片30を介してクリックゴム24を大きな力で押
し込むことができ、よって押圧操作力の軽減化が図れる
という利点もある。しかも、上記実施例では操作片30
自体が弾性片であって、クリックゴム24の駆動部24
bをストローク最下点まで押し込んだ後に該操作片30
が若干撓むので、極めて薄型の押釦スイッチでありなが
ら確実にオーバーストロークが得られ、良好な操作感触
が期待できる。
Furthermore, in the key top holder 25 used in the above embodiment, one link member 26 has an operation piece 30.
Is provided, and when the operator pushes in the key top 23, the operation piece 30 presses and drives the movable contact 18 via the drive portion 24b of the click rubber 24. Therefore, the stem can be omitted, and the descending distance of the drive unit 24b required for switching can be set smaller than the operation stroke of the key top 23. That is, the link member 26 having the operation piece 30 rotates about the tip of the external leg piece 29 as a movable fulcrum, but the turning radius of the tip of the operation piece 30 elastically contacting the top surface of the drive portion 24b is: Since the radius of rotation of the support shaft 28 that is directly pressed into the key top 23 is about half, the drive unit 24
The pushing amount of b can be reduced to about half the pushing amount of the key top 23. As a result, the amount of deformation of the click rubber 24 due to the operation is reduced, the life thereof is extended, and high reliability is maintained for a long time. it can. Moreover, the turning radius of the distal end portion of the operation piece 30, which is the point of action, is the same as the support shaft 28, which is the force point.
Since it is about half of the turning radius of, even if the pressing operation force applied to the support shaft 28 is small,
There is also an advantage that the click rubber 24 can be pushed in with a large force through the operation piece 30, and thus the pressing operation force can be reduced. Moreover, in the above embodiment, the operation piece 30
The driving part 24 of the click rubber 24 is itself an elastic piece.
After pushing b to the lowest point of the stroke, the operation piece 30
Is slightly bent, so that an overstroke can be reliably obtained even with an extremely thin push button switch, and a good operation feeling can be expected.

【0024】なお、上記実施例では、外側のリンク部材
に設けた操作片をクリックゴムに弾接させているが、同
様の操作片を内側のリンク部材に設けたり、クリックゴ
ム以外の弾性部材で両リンク部材を上方へ付勢したり、
あるいは弾性部材を介さずに可動接点を直接押圧駆動で
きる操作片を採用するなどしてもよい。また、両リンク
部材の一方を省略し、キートップ保持体を前述した従来
例と同様に1つのリンク部材(脚片)で構成することも
可能である。
In the above embodiment, the operation piece provided on the outer link member is elastically contacted with the click rubber. However, a similar operation piece is provided on the inner link member or an elastic member other than the click rubber is used. Urge both link members upward,
Alternatively, an operation piece that can directly drive the movable contact without using an elastic member may be adopted. It is also possible to omit one of the two link members and configure the key top holder with one link member (leg piece) as in the conventional example described above.

【0025】[0025]

【発明の効果】以上説明したように、本発明によれば、
ハウジングに脚片収納孔とこの脚片収納孔に連通し支持
板側が開口された係合凹部とを設け、キートップを保持
する脚片の端部に設けた係合突起を係合凹部と支持板と
の間にスライド可能に係合したため、押釦スイッチ全体
の高さ寸法を小さくすることができ、また、ハウジング
の成形用金型を簡略化してコストダウンを図ることがで
き、さらに、脚片収納孔を利用して脚片の係合突起をハ
ウジングの係合凹部に簡単に取付けことができる等、種
々の効果を奏する。
As described above, according to the present invention,
The housing is provided with a leg piece accommodating hole and an engaging concave portion communicating with the leg piece accommodating hole and having an opening on the support plate side, and the engaging projection provided at the end of the leg piece holding the key top is supported by the engaging concave portion. Since it is slidably engaged with the plate, the height dimension of the entire push button switch can be reduced, and the molding die for the housing can be simplified to reduce the cost. Various effects can be obtained such that the engaging projections of the leg pieces can be easily attached to the engaging recesses of the housing by using the accommodation holes.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明の一実施例に係る押釦スイッチのオフ状
態の断面図である。
FIG. 1 is a cross-sectional view of a push button switch in an off state according to an embodiment of the present invention.

【図2】該押釦スイッチのオン状態の断面図である。FIG. 2 is a sectional view of the push button switch in an ON state.

【図3】該押釦スイッチに備えられるハウジングの平面
図である。
FIG. 3 is a plan view of a housing provided in the push button switch.

【図4】該ハウジングの側面図である。FIG. 4 is a side view of the housing.

【図5】図1の押釦スイッチに組み込まれるキートップ
保持体の斜視図である。
5 is a perspective view of a keytop holder incorporated in the push button switch of FIG. 1. FIG.

【図6】該キートップ保持体の分解斜視図である。FIG. 6 is an exploded perspective view of the keytop holder.

【図7】該キートップ保持体の動作説明図である。FIG. 7 is an operation explanatory view of the keytop holder.

【図8】従来の押釦スイッチを示す断面図である。FIG. 8 is a sectional view showing a conventional push button switch.

【符号の説明】[Explanation of symbols]

15 支持板 16 メンブレンスイッチ(スイッチ素子) 22 ハウジング 22a 開口部 22b,22c 脚片収納孔 22d,22e 係合凹部 23 キートップ 24 クリックゴム(弾性部材) 25 キートップ保持体 26,27 リンク部材 28,31 支持軸 29 外部脚片 29a,32a 係合突起 30 操作片 32 内部脚片 15 Support Plate 16 Membrane Switch (Switch Element) 22 Housing 22a Openings 22b and 22c Leg Piece Storage Holes 22d and 22e Engagement Recess 23 Key Top 24 Click Rubber (Elastic Member) 25 Key Top Holder 26, 27 Link Member 28, 31 Support Shaft 29 External Leg Piece 29a, 32a Engagement Protrusion 30 Operating Piece 32 Internal Leg Piece

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】 支持板と、この支持板上に載置された合
成樹脂製のハウジングと、このハウジングに脚片を介し
て昇降自在に支持されたキートップと、このキートップ
を上方へ付勢する弾性部材と、前記キートップの昇降に
よって接点の切り換えが行われるスイッチ素子とを備
え、前記脚片の一端を前記キートップの裏面に回転自在
に係合し、他端を前記ハウジングにスライド自在に係合
した押釦スイッチにおいて、前記ハウジングに前記脚片
を収納可能な脚片収納孔を穿設すると共に、この脚片収
納孔に連通し前記支持板側が開口された係合凹部を設
け、前記脚片の他端に設けた係合突起を前記係合凹部と
前記支持板との間にスライド可能に係合したことを特徴
とする押釦スイッチ。
1. A support plate, a housing made of synthetic resin placed on the support plate, a key top movably supported by the housing via leg pieces, and the key top attached upward. An elastic member for urging and a switch element whose contacts are switched by raising and lowering the key top are provided, one end of the leg piece is rotatably engaged with the back surface of the key top, and the other end slides on the housing. In the freely-engaged push button switch, the housing is provided with a leg piece accommodating hole capable of accommodating the leg piece, and an engaging concave portion communicating with the leg piece accommodating hole and having the support plate side opened is provided, A push button switch, wherein an engagement protrusion provided on the other end of the leg piece is slidably engaged between the engagement recess and the support plate.
JP04233792A 1992-06-11 1992-09-01 Push button switch Expired - Lifetime JP3139580B2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP04233792A JP3139580B2 (en) 1992-09-01 1992-09-01 Push button switch
TW082102920A TW367513B (en) 1992-06-11 1993-04-16 Key switch
US08/390,266 US5488210A (en) 1992-06-11 1995-02-16 Push button switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP04233792A JP3139580B2 (en) 1992-09-01 1992-09-01 Push button switch

Related Child Applications (1)

Application Number Title Priority Date Filing Date
JP2000323990A Division JP3372937B2 (en) 2000-10-24 2000-10-24 Push button switch

Publications (2)

Publication Number Publication Date
JPH0684425A true JPH0684425A (en) 1994-03-25
JP3139580B2 JP3139580B2 (en) 2001-03-05

Family

ID=16960645

Family Applications (1)

Application Number Title Priority Date Filing Date
JP04233792A Expired - Lifetime JP3139580B2 (en) 1992-06-11 1992-09-01 Push button switch

Country Status (1)

Country Link
JP (1) JP3139580B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001044917A1 (en) * 1999-12-17 2001-06-21 Smk Corporation Keyboard switch

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001044917A1 (en) * 1999-12-17 2001-06-21 Smk Corporation Keyboard switch
US6297461B1 (en) 1999-12-17 2001-10-02 Smk Corporation Keyboard switch

Also Published As

Publication number Publication date
JP3139580B2 (en) 2001-03-05

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