JPH08235964A - Push button switch - Google Patents
Push button switchInfo
- Publication number
- JPH08235964A JPH08235964A JP5975095A JP5975095A JPH08235964A JP H08235964 A JPH08235964 A JP H08235964A JP 5975095 A JP5975095 A JP 5975095A JP 5975095 A JP5975095 A JP 5975095A JP H08235964 A JPH08235964 A JP H08235964A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- movable contact
- fixed contact
- contact portion
- rubber sheet
- 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.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H13/00—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch
- H01H13/70—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard
- H01H13/78—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites
- H01H13/785—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a plurality of operating members associated with different sets of contacts, e.g. keyboard characterised by the contacts or the contact sites characterised by the material of the contacts, e.g. conductive polymers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2201/00—Contacts
- H01H2201/022—Material
- H01H2201/032—Conductive polymer; Rubber
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H2203/00—Form of contacts
- H01H2203/012—Microprotrusions
Landscapes
- Push-Button Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は押しボタンスイッチに関
するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a push button switch.
【０００２】[0002]
【従来の技術】従来、いわゆるラバーコンタクトと呼ば
れる押しボタンスイッチが知られている。その一例とし
ては実開平１ー１１５１３４号公報のものが挙げられ
る。ここには次のような技術が開示されている。すなわ
ち、基板上にはラバーシートが積層され、かつこのラバ
ーシートには基板上に形成された固定接点部に整合する
ように突起部が設けられている。また、突起部の下面に
は導電ゴムよりなる可動接点部が一体に設けられてい
る。一方、突起部の上部には押しボタンが配置され、押
しボタンの押圧操作によって可動接点部と固定接点部と
が接触するようになっている。特に、この公報では基板
とラバーシートとの間に侵入する粉塵によって接触不良
が生じるのを解消することを目的としている。つまり、
可動接点部を平面状に形成していたのでは固定接点部と
面当たりとなり、粉塵が介在したときには接触不良とな
りやすい。そこで、可動接点部における固定接点部との
対向面を傾斜面としている。このようにすれば、押しボ
タンの押圧によって突起部が押し下げられると、可動接
点部は固定接点部に当接しながら外側へ撓み変形するた
め、このときのワイピング作用によって堆積した粉塵を
除去して導通が確保されるのである。2. Description of the Related Art Heretofore, a push button switch called a so-called rubber contact has been known. An example thereof is that of Japanese Utility Model Laid-Open No. 1-115134. The following techniques are disclosed here. That is, the rubber sheet is laminated on the substrate, and the rubber sheet is provided with the protrusion so as to be aligned with the fixed contact portion formed on the substrate. In addition, a movable contact portion made of conductive rubber is integrally provided on the lower surface of the protrusion. On the other hand, a push button is arranged above the protrusion, and the movable contact portion and the fixed contact portion are brought into contact with each other when the push button is pressed. In particular, this publication aims at eliminating the occurrence of contact failure due to dust entering between the substrate and the rubber sheet. That is,
If the movable contact portion were formed in a flat shape, it would come into surface contact with the fixed contact portion, and if dust is present, poor contact is likely to occur. Therefore, the surface of the movable contact portion facing the fixed contact portion is an inclined surface. With this configuration, when the protrusion is pushed down by pressing the push button, the movable contact portion flexes and deforms outward while contacting the fixed contact portion, so that dust accumulated by the wiping action at this time is removed and conduction is performed. Is secured.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら上記の従
来技術では、次のような解決すべき問題点があった。す
なわち、可動接点部はラバーシートの成形時において一
体化されるのであるが、成形の際には可動接点部を金型
内の所定位置に一定の向きでセットしなければならな
い。ところが、上記したものでは可動接点部については
セット時の方向性が設定されているため、表裏を選別す
るたの治具が必要となったり、あるいは正規の姿勢でセ
ットされたか否かの確認のための作業が必要となる。ま
た、万一誤まった姿勢で成形されてしまった場合には接
触不良の問題が残る。However, the above-mentioned prior art has the following problems to be solved. That is, the movable contact portion is integrated at the time of molding the rubber sheet, but at the time of molding, the movable contact portion must be set at a predetermined position in the mold with a fixed orientation. However, in the above-mentioned ones, the directionality at the time of setting the movable contact part is set, so it is necessary to use a jig for sorting the front and back, or to confirm whether it is set in the proper posture. Work is required. In addition, if the product is molded in the wrong posture, the problem of poor contact remains.
【０００４】さらに、絶縁材よりなるラバーシートと導
電材よりなる可動接点部とは異質のゴム材であるため、
接着強度が不足しがちである、という問題点もある。Further, since the rubber sheet made of an insulating material and the movable contact portion made of a conductive material are different rubber materials,
There is also a problem that the adhesive strength tends to be insufficient.
【０００５】本発明は上記した従来の問題点に鑑みて開
発工夫されたものであり、その目的とするところは可動
接点部の金型へのセッティング作業を容易にしかつ可動
接点部とラバーシートとの接着強度が高められる押しボ
タンスイッチを提供することである。The present invention has been developed and devised in view of the above-mentioned conventional problems, and an object of the present invention is to facilitate setting work of a movable contact portion in a mold and to provide a movable contact portion and a rubber sheet. It is an object of the present invention to provide a push button switch in which the adhesive strength of the push button switch is enhanced.
【０００６】[0006]
【課題を解決するための手段】上記の目的を達成するた
めの請求項１の発明は、基板上には固定接点部が配置さ
れ、この固定接点部を覆うようにして弾性材よりなる押
圧操作可能な操作部が設けられ、かつこの操作部の内部
には操作部の押圧操作に伴って前記固定接点部に接触可
能でかつ導電性を有する弾性材よりなる可動接点部が取
り付けられてなるものにおいて、この可動接点部におけ
る固定接点部との対向面およびこの対向面との裏面側で
前記操作部に対する取付け面が共に凹凸形状となってい
ることを特徴とするものである。According to a first aspect of the invention for achieving the above object, a fixed contact portion is arranged on a substrate, and a pressing operation made of an elastic material is provided so as to cover the fixed contact portion. And a movable contact portion made of an elastic material that is electrically conductive and is capable of contacting the fixed contact portion when the operation portion is pressed. In the second aspect, the movable contact portion has a concavo-convex shape both on the surface facing the fixed contact portion and on the rear surface side of the facing surface, the mounting surface for the operating portion.
【０００７】また、請求項２の発明では、請求項１記載
のものにおいて、前記凹凸形状のうちの凸部形状は先細
り形状をなし、かつ撓み変形可能に形成されていること
を特徴とするものである。Further, in a second aspect of the present invention, in the first aspect, the convex portion of the concave-convex shape has a tapered shape and is formed so as to be flexibly deformable. Is.
【０００８】[0008]
【作用】請求項１の発明の作用は以下のようである。可
動接点部は表裏共に凹凸形状をしているため、ラバーシ
ートの成形を行なう場合にも金型に対する取付けの方向
性が問われない。一方、操作部が押されて可動接点部が
固定接点部と接触した場合に、両間に粉塵等の異物の混
入していても、可動接点部に形成された凹凸によって異
物を回避しつつ両接点部が接触することができる。ま
た、凹凸形状とすることによって操作部側との接触面
積、つまり接着に関与する面積が拡大する。The operation of the invention of claim 1 is as follows. Since the front and back surfaces of the movable contact portion are uneven, the direction of attachment to the mold does not matter when molding the rubber sheet. On the other hand, when the movable contact part comes into contact with the fixed contact part when the operating part is pressed, even if foreign matter such as dust is mixed between the two, the unevenness formed on the movable contact part avoids the foreign matter. The contact parts can contact. Further, the uneven shape increases the contact area with the operation portion side, that is, the area involved in adhesion.
【０００９】請求項２の発明では、可動接点部の凸部形
状は先細りとなっているため、粉塵の回避が容易であ
る。According to the second aspect of the invention, since the convex shape of the movable contact portion is tapered, it is easy to avoid dust.
【００１０】[0010]
【発明の効果】本発明の効果は次のようである。請求項
１の発明によれば、可動接点は表裏共に凹凸形状が形成
されているため、金型へのセット時にその方向性が問わ
れない。また、操作部との接着面積も拡大できるため、
可動接点部の剥離防止にも寄与する。The effects of the present invention are as follows. According to the invention of claim 1, since the movable contact is formed with the uneven shape on both the front and the back, the directionality thereof does not matter when the movable contact is set in the mold. Also, because the adhesion area with the operating part can be expanded,
It also contributes to the prevention of peeling of the movable contact part.
【００１１】また、請求項２の発明によれば、粉塵を回
避して両接点間の接触を確実なものにすることができ
る。According to the second aspect of the present invention, it is possible to avoid dust and ensure reliable contact between both contacts.
【００１２】[0012]
【実施例】以下、本発明の第１実施例に係る押しボタン
スイッチを図１〜図４に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A push button switch according to a first embodiment of the present invention will be described below with reference to FIGS.
【００１３】図面において、１は基板（プリント基板）
であり、その表面には各種電気配線が印刷によって付さ
れ、かつ、この配線中にはそれぞれ一対の固定接点２が
介在されている。また、基板１上には絶縁性を有するゴ
ム材により成形されたラバーシート３が積層されてい
る。但し、ラバーシート３の外周部は基板１に対して密
封接着されておらず、このためラバーシート３と基板１
との間に粉塵等の異物が侵入しうる状態にある。In the drawings, 1 is a substrate (printed circuit board)
Various electric wirings are attached to the surface by printing, and a pair of fixed contacts 2 are respectively interposed in the wirings. A rubber sheet 3 formed of a rubber material having an insulating property is laminated on the substrate 1. However, the outer peripheral portion of the rubber sheet 3 is not hermetically adhered to the substrate 1, and therefore the rubber sheet 3 and the substrate 1
Foreign matter such as dust can enter between and.
【００１４】このラバーシート３において、前記固定接
点２と対応する位置には操作部４が一体に膨出形成され
ている。操作部４はドーム状をなして形成されるととも
に、その頂部には上方へ開口する円筒部５が立設されて
いる。ラバーシート３の上方には図示しない押しボタン
が配置され、常には円筒部５の上端に当接している。そ
して、押しボタン操作を行うことで、操作部４全体が図
１（Ｂ）に示すように撓み変形可能となり、次述する接
点同士の接触がなされるようになっている。In this rubber sheet 3, an operating portion 4 is integrally formed in a bulge at a position corresponding to the fixed contact 2. The operation portion 4 is formed in a dome shape, and a cylindrical portion 5 that opens upward is provided upright on the top of the operation portion 4. A push button (not shown) is arranged above the rubber sheet 3, and is always in contact with the upper end of the cylindrical portion 5. When the push button is operated, the entire operation portion 4 can be flexibly deformed as shown in FIG. 1 (B), and the contacts described below are brought into contact with each other.
【００１５】操作部４の内面には円筒部５と同軸でかつ
円柱状に形成された接続突部６が垂下している。そし
て、この接続突部６の下面には円盤状の可動接点板７
（可動接点部）が固着されている。この可動接点板７は
導電ゴムにより形成されており、ラバーシート３の成形
の際に成形金型中の所定位置に仕掛けられてインサート
成形によって接続突部６の下面において一体化される。
そして、図示しない押しボタンの押圧操作によって可動
接点板７が両固定接点２に接触可能である。On the inner surface of the operating portion 4, a connecting projection 6 is formed which is coaxial with the cylindrical portion 5 and is formed in a cylindrical shape. On the lower surface of the connecting protrusion 6, a disk-shaped movable contact plate 7 is provided.
(Movable contact) is fixed. The movable contact plate 7 is made of conductive rubber, and is mounted at a predetermined position in a molding die when the rubber sheet 3 is molded and integrated on the lower surface of the connecting protrusion 6 by insert molding.
The movable contact plate 7 can contact both fixed contacts 2 by pressing a push button (not shown).
【００１６】また、可動接点板７の表裏、つまり固定接
点２と対向する面および接続突部６との接着面には、共
に図３に示すような同一の凹凸形状が形成されている。
第１実施例では、可動接点板７の表裏両面に多数の微小
突部８が均一に配されており、それぞれは基端側が太
く、先端側にゆくにつれて徐々に細くなるように形成さ
れ、さらにそれぞれの先端部はほぼ球状をなして形成さ
れている。また、各微小突部８は比較的良好な撓み性が
付与されていて、図４に示すように可動接点板７と固定
接点２との間に粉塵等の異物を噛んだときに、異物を避
けるような弾性変形が可能である。The same concavo-convex shape as shown in FIG. 3 is formed on the front and back surfaces of the movable contact plate 7, that is, on the surface facing the fixed contact 2 and the bonding surface with the connecting projection 6.
In the first embodiment, a large number of minute projections 8 are uniformly arranged on both front and back surfaces of the movable contact plate 7, each of which is formed such that the base end side is thick and the tip end side is gradually thinned. Each tip is formed in a substantially spherical shape. Further, each minute projection 8 is provided with relatively good flexibility, and when foreign matter such as dust is caught between the movable contact plate 7 and the fixed contact 2 as shown in FIG. Elastic deformations that can be avoided are possible.
【００１７】次に、上記のように構成された第１実施例
の作用効果を具体的に説明する。図示しない押しボタン
が押されると、円筒部５が押される。これによって、操
作部４全体が潰れるように弾性変形するため、接続突部
６を介して可動接点板７が下降し、可動接点板７と固定
接点２とが接触し、その結果回路が閉じてスイッチがＯ
Ｎの状態となる。逆に、図示しない押しボタンの押圧操
作を解除すれば、操作部４自体の弾性復元力によって接
続突部６および可動接点板７が上昇するため、可動接点
板７と固定接点２とが離間し、スイッチはオフの状態と
なる。Next, the function and effect of the first embodiment constructed as described above will be concretely described. When a push button (not shown) is pressed, the cylindrical portion 5 is pressed. As a result, since the entire operation portion 4 is elastically deformed so as to be crushed, the movable contact plate 7 descends via the connection protrusion 6, the movable contact plate 7 and the fixed contact 2 come into contact, and as a result, the circuit is closed. Switch is O
The state becomes N. On the contrary, when the pressing operation of the push button (not shown) is released, the elastic protrusion of the operating portion 4 raises the connecting projection 6 and the movable contact plate 7, so that the movable contact plate 7 and the fixed contact 2 are separated from each other. , The switch is turned off.
【００１８】ところで、本例では可動接点板７はその表
裏両面に微小突部８を形成するようにしている。このた
め、ラバーシート３の成形のための金型へ仕掛ける際
に、表裏いずれの方向でセットされてもよく、したがっ
て表裏選別の煩わしさから解消される。また、微小突部
８を形成したことによって、固定接点２と可動接点板７
との間に異物が混入することがあっても、微小突部８が
これを避けるようにして撓み変形し、固定接点２との接
触を妨げないため、確実に両接点の接触状況が得られ
る。さらに、このような微小突部８は接続突部６との接
触面積を増加させるものでもあるため、ラバーシート３
側との機械的接着強度の増強によって剥離防止にもな
る。By the way, in this example, the movable contact plate 7 is formed with the minute projections 8 on both front and back surfaces thereof. Therefore, when the rubber sheet 3 is mounted in a mold for molding, the rubber sheet 3 may be set in either the front side or the back side, and therefore the trouble of front / back side selection is eliminated. Further, since the minute protrusions 8 are formed, the fixed contact 2 and the movable contact plate 7 are formed.
Even if foreign matter is mixed in between the contact points, the minute protrusions 8 are flexibly deformed so as to avoid this, and contact with the fixed contacts 2 is not hindered, so that the contact state of both contacts can be reliably obtained. . Further, since such a minute projection 8 also increases the contact area with the connection projection 6, the rubber sheet 3
It also prevents peeling by increasing the mechanical adhesion strength with the side.
【００１９】このような効果については、特に、第１実
施例における微小突部８の形状が先細りであるため、平
面同士を突き当てるような場合と比較して異物との干渉
を回避しやすいものであり、また外径が均一なピン軸形
状のものと比較して接続突部６に対する接着面積が大き
くとれる要因にもなっている。Regarding such an effect, in particular, since the shape of the minute projection 8 in the first embodiment is tapered, it is easier to avoid the interference with the foreign matter as compared with the case where the flat surfaces are butted against each other. In addition, it is a factor that the bonding area for the connecting projection 6 can be made larger than that of the pin shaft shape having a uniform outer diameter.
【００２０】図５は本発明の第２実施例に係る可動接点
板７を示すものである。この実施例では可動接点板７の
表裏に設けられる微小突部８を、それぞれ複数の鋸歯状
に形成したものである。各微小突部８は固定接点２との
接触の際にはそれぞれの先端部が長さ方向に沿って撓
み、線当たり状態で固定接点２と接触する。つまり、固
定接点２に異物が侵入した場合には、鋸歯状の微小突部
８が異物を避けながら撓み変形する。また、各微小突部
８の両側面が接続突部６との接着面として機能する。FIG. 5 shows a movable contact plate 7 according to the second embodiment of the present invention. In this embodiment, the minute projections 8 provided on the front and back of the movable contact plate 7 are each formed in a plurality of sawtooth shapes. When each minute protrusion 8 contacts the fixed contact 2, the tip of each minute protrusion 8 bends along the lengthwise direction and comes into contact with the fixed contact 2 in a line contact state. That is, when a foreign matter enters the fixed contact 2, the sawtooth-shaped minute projections 8 flex and deform while avoiding the foreign matter. Further, both side surfaces of each minute projection 8 function as an adhesive surface with the connection projection 6.
【００２１】なお、他の構成は第１実施例と同様であ
り、もって同様の作用効果を発揮することができる。The other structure is the same as that of the first embodiment, so that the same function and effect can be exhibited.
【００２２】図６は本発明の第３実施例に係る可動接点
板７を示すものである。この例では可動接点板７の表裏
に設けられる微小突部８は、それぞれ短円筒状に形成さ
れたものである。各微小突部８は先端が水平に面取りさ
れた短円柱状に形成され、固定接点２との接触の際に微
小突部８の間に異物が噛み込む場合には外側へ拡開して
これを回避るような弾性変形が許容されている。FIG. 6 shows a movable contact plate 7 according to the third embodiment of the present invention. In this example, the minute protrusions 8 provided on the front and back of the movable contact plate 7 are each formed in a short cylindrical shape. Each of the minute protrusions 8 is formed in a short column shape with a horizontally chamfered tip, and when foreign matter is caught between the minute protrusions 8 when contacting with the fixed contact 2, the minute protrusions 8 are expanded to the outside. Elastic deformation that avoids is allowed.
【００２３】なお、他の構成は第１、第２の実施例と同
様であり、もってこれらと同様の作用効果を発揮するこ
とができる。The rest of the configuration is the same as that of the first and second embodiments, so that it is possible to exhibit the same effects as these.
【００２４】以上のように、微小突部８は種々の形状が
考えられ、各実施例のものに限定されるべきものではな
い。例えば、両接点間に異物が混入したときにこれを回
避でき、接続突部６との間に必要な接着面積が確保され
るようなものであることが望ましい。As described above, the minute protrusions 8 may have various shapes and should not be limited to those of each embodiment. For example, it is desirable that foreign matter can be avoided when it is mixed between both contact points and a necessary bonding area with the connecting projection 6 can be secured.
【図１】押しボタンスイッチの拡大断面図[Fig.1] Enlarged sectional view of push button switch
【図２】基板とラバーシートの一部を示す斜視図FIG. 2 is a perspective view showing a part of a substrate and a rubber sheet.
【図３】可動接点を拡大して示す斜視図FIG. 3 is an enlarged perspective view showing a movable contact.
【図４】異物が侵入したときの状態を示す断面図FIG. 4 is a cross-sectional view showing a state when foreign matter has entered.
【図５】第２実施例の可動接点を示す斜視図FIG. 5 is a perspective view showing a movable contact according to a second embodiment.
【図６】第３実施例の可動接点を示す斜視図FIG. 6 is a perspective view showing a movable contact according to a third embodiment.
１…基板 ２…固定接点 ３…ラバーシート ４…操作部 ６…接続突部 ７…可動接点板 ８…微小突部（凹凸形状） DESCRIPTION OF SYMBOLS 1 ... Substrate 2 ... Fixed contact 3 ... Rubber sheet 4 ... Operation part 6 ... Connection projection 7 ... Movable contact plate 8 ... Micro projection (uneven shape)
Claims (2)
固定接点部を覆うようにして弾性材よりなる押圧操作可
能な操作部が設けられ、かつこの操作部の内部には操作
部の押圧操作に伴って前記固定接点部に接触可能でかつ
導電性を有する弾性材よりなる可動接点部が取り付けら
れてなるものにおいて、 この可動接点部における固定接点部との対向面およびこ
の対向面との裏面側で前記操作部に対する取付け面が共
に凹凸形状となっていることを特徴とする押しボタンス
イッチ。1. A fixed contact portion is arranged on a substrate, and an operation portion made of an elastic material is provided so as to cover the fixed contact portion. The operation portion is provided inside the operation portion. A movable contact portion made of an elastic material that is electrically conductive and is capable of contacting the fixed contact portion in response to a pressing operation, and a surface of the movable contact portion facing the fixed contact portion and a surface facing the fixed contact portion. The push button switch is characterized in that both of the mounting surfaces for the operation portion on the back side of the are uneven.
形状のうちの凸部形状は先細り形状をなし、かつ撓み変
形可能に形成されていることを特徴とする押しボタンス
イッチ。2. The push-button switch according to claim 1, wherein the convex shape of the concave-convex shape has a tapered shape and is formed so as to be flexibly deformable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5975095A JPH08235964A (en) | 1995-02-22 | 1995-02-22 | Push button switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5975095A JPH08235964A (en) | 1995-02-22 | 1995-02-22 | Push button switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH08235964A true JPH08235964A (en) | 1996-09-13 |
Family
ID=13122242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5975095A Pending JPH08235964A (en) | 1995-02-22 | 1995-02-22 | Push button switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH08235964A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001330527A (en) * | 2000-05-19 | 2001-11-30 | Nitta Ind Corp | Force detector |
| JP2010040212A (en) * | 2008-07-31 | 2010-02-18 | Shin Etsu Polymer Co Ltd | Member for push-button switch |
-
1995
- 1995-02-22 JP JP5975095A patent/JPH08235964A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001330527A (en) * | 2000-05-19 | 2001-11-30 | Nitta Ind Corp | Force detector |
| JP2010040212A (en) * | 2008-07-31 | 2010-02-18 | Shin Etsu Polymer Co Ltd | Member for push-button switch |
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