JPH07141958A - Pressure sensitive switch - Google Patents
Pressure sensitive switchInfo
- Publication number
- JPH07141958A JPH07141958A JP31436793A JP31436793A JPH07141958A JP H07141958 A JPH07141958 A JP H07141958A JP 31436793 A JP31436793 A JP 31436793A JP 31436793 A JP31436793 A JP 31436793A JP H07141958 A JPH07141958 A JP H07141958A
- Authority
- JP
- Japan
- Prior art keywords
- elastic
- conductive
- pressure
- sensitive switch
- conductive members
- 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
- H01H3/00—Mechanisms for operating contacts
- H01H3/02—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch
- H01H3/14—Operating parts, i.e. for operating driving mechanism by a mechanical force external to the switch adapted for operation by a part of the human body other than the hand, e.g. by foot
- H01H3/141—Cushion or mat switches
- H01H3/142—Cushion or mat switches of the elongated strip type
Landscapes
- Push-Button Switches (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、わん曲した状態でも、
加圧時に良好な導通状態が得られ、無加圧時には、確実
な絶縁が保持される感圧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 pressure-sensitive switch in which a good conductive state is obtained when pressure is applied and reliable insulation is maintained when no pressure is applied.
【０００２】[0002]
【従来の技術】近年、あらゆる分野で省人化、無人化が
進み、多種多様なスイッチ、センサが開発されている
が、工場設備、防犯、医療、土木、生活周辺機器などの
起動、停止スイッチ、計測、検出センサとして、加圧ス
イッチが用いられる。2. Description of the Related Art In recent years, labor saving and unmanning have progressed in all fields, and various types of switches and sensors have been developed. However, start and stop switches for factory equipment, crime prevention, medical care, civil engineering, daily life peripherals, etc. A pressure switch is used as the measurement and detection sensor.
【０００３】例えば、図２に示すように、加圧導電ゴム
１１と平編線１２、１２′との間に間隙１４、１４′を
形成し、全体を絶縁ゴム１３で被覆したものが知られて
いる（特開昭６１−１６１６２１号公報）。For example, as shown in FIG. 2, it is known that gaps 14 and 14 'are formed between a pressure conductive rubber 11 and flat braided wires 12 and 12', and the whole is covered with an insulating rubber 13. (JP-A-61-161621).
【０００４】しかしながら、このスイッチにおいては、
局部的な加圧が行われた場合、平編線１２、１２′が変
形したまま元の形状に復元せず、無加圧状態にもかかわ
らず、電流が流れてしまうという問題がある。However, in this switch,
When the local pressure is applied, there is a problem that the flat braided wires 12 and 12 'do not return to their original shapes while being deformed, and current flows even in the non-pressurized state.
【０００５】そこで、本発明者は、先に、図３に示すよ
うに、可撓性導体２２、２２′を挿通した一対の導電部
材２１、２１′を空隙２４を介して互いに対向させ、全
体を弾性絶縁部材２３で被覆した感圧スイッチを提案し
た（特願平３−１５５５９５号）。Therefore, as shown in FIG. 3, the present inventor first made the pair of conductive members 21 and 21 ′, into which the flexible conductors 22 and 22 ′ are inserted, to face each other with a gap 24 between them, and A pressure-sensitive switch in which the above is covered with an elastic insulating member 23 has been proposed (Japanese Patent Application No. 3-155595).
【０００６】このスイッチによれば、上記の問題は解決
できるものの、例えば、自動車のバンパーのようなわん
曲面に取り付けて使用すると、スイッチをわん曲させた
ことによって空隙２４がつぶれ、導電部材２１、２１′
が接触して導通状態となり、可撓性導体２２、２２′の
いずれか一方から他方へ常に電流が流れ、スイッチ機能
を果さなくなってしまうという新たな問題が生ずること
がわかってきた。Although this switch can solve the above-mentioned problems, when it is used by being attached to a curved surface such as a bumper of an automobile, the void 24 is crushed by bending the switch, and the conductive member 21, 21 '
It has been found that a new problem arises in that the switch contacts and becomes conductive, and a current always flows from one of the flexible conductors 22 and 22 'to the other, thereby failing to perform the switch function.
【０００７】[0007]
【発明が解決しようとする課題】従って、本発明は、自
動車のバンパーのようなわん曲面に取り付けて、わん曲
した状態で使用した場合でも、加圧時に良好な導通状態
が得られ、無加圧時には確実な絶縁状態が保持される感
圧スイッチを提供することを課題とするものである。SUMMARY OF THE INVENTION Therefore, according to the present invention, even when it is attached to a curved surface such as a bumper of an automobile and used in a curved state, a good conduction state can be obtained at the time of pressurization. It is an object of the present invention to provide a pressure-sensitive switch in which a reliable insulating state is maintained when pressure is applied.
【０００８】[0008]
【課題を解決するための手段】本発明者は、上記課題を
解決すべく鋭意検討を重ねた結果、わん曲によって伸張
する側には伸張性の良好な弾性導電部材を配置し、伸張
性に劣る可撓性導体を挿通した導電部材をわん曲によっ
て縮む側に配置することを考え、本発明を完成するに至
った。Means for Solving the Problems As a result of intensive studies to solve the above-mentioned problems, the present inventor has arranged an elastic conductive member having good expandability on the side that is expanded by bending, and The present invention has been completed in consideration of arranging the conductive member having the inferior flexible conductor inserted therein on the side contracted by bending.
【０００９】即ち、本発明は、可撓性導体を挿通した一
対の導電部材を互いに絶縁した状態で平行に配列し、該
一対の導電部材と対向して、該一対の導電部材とは絶縁
された弾性導電部材を空隙を介して配置し、全体を弾性
絶縁部材で被覆したことを特徴とする感圧スイッチであ
る。That is, according to the present invention, a pair of conductive members having a flexible conductor inserted therein are arranged in parallel in a state of being insulated from each other, facing the pair of conductive members and insulated from the pair of conductive members. In the pressure-sensitive switch, an elastic conductive member is arranged via a gap and the whole is covered with an elastic insulating member.
【００１０】[0010]
【作用】本発明のスイッチは、可撓性導体を挿通した一
対の導電部材を互いに絶縁した状態で平行に配列し、該
一対の導電部材と対向して、該一対の導電部材とは絶縁
された弾性導電部材を空隙を介して配置し、全体を弾性
絶縁部材で被覆しているから、無加圧状態では、一対の
導電部材は完全に絶縁されており、可撓性導体に電流が
流れるようなことはまったくなく、発熱の危険性や無駄
な電流の消費を回避することができる。According to the switch of the present invention, a pair of conductive members having a flexible conductor inserted therein are arranged in parallel with each other in an insulated state, facing the pair of conductive members and insulated from the pair of conductive members. Since the elastic conductive member is arranged through the gap and is entirely covered with the elastic insulating member, in the unpressurized state, the pair of conductive members are completely insulated and a current flows through the flexible conductor. There is no such a case, and it is possible to avoid the danger of heat generation and unnecessary current consumption.
【００１１】また、可撓性導体を挿通した導電部材、弾
性導電部材及び弾性絶縁部材で構成しているので、いず
れの方向への屈曲性にも優れており、かつ局部的な加圧
に対しても復元力が強く、加圧後、元の形状に復元せ
ず、無加圧状態であるにもかかわらず、電流が流れてし
まうという問題も生じない。Further, since it is composed of a conductive member having a flexible conductor inserted therethrough, an elastic conductive member, and an elastic insulating member, it is excellent in bendability in any direction and is resistant to local pressure. However, the restoring force is strong, the original shape is not restored after the pressurization, and there is no problem that the electric current flows even in the non-pressurized state.
【００１２】本発明のスイッチが加圧されると、空隙が
つぶれて、一対の導電部材と弾性導電部材とが接触し、
弾性導電部材を介して一対の導電部材が導通し、可撓性
導体のいずれか一方から他方へ電流が流れ、スイッチと
して作動することになる。When the switch of the present invention is pressed, the void is crushed and the pair of conductive members and the elastic conductive member come into contact with each other,
The pair of conductive members are brought into conduction via the elastic conductive member, and a current flows from any one of the flexible conductors to the other to operate as a switch.
【００１３】本発明のスイッチをわん曲した状態で使用
する場合は、伸張性に富んだ弾性導電部材を配置した側
が外側となるようにわん曲させれば、その変形に応じて
弾性導電部材が伸張し、空隙がつぶれるようなことがな
い。従って、一対の導電部材は互いに絶縁状態が保持さ
れており、可撓性導体に常に電流が流れて、スイッチ機
能を果さなくなるという問題は起こらない。When the switch of the present invention is used in a bent state, the elastic conductive member can be bent according to the deformation by bending the switch so that the side on which the elastic conductive member having high stretchability is arranged is the outer side. Stretches and voids do not collapse. Therefore, the pair of conductive members are kept insulated from each other, and there is no problem that a current always flows through the flexible conductor and the switch function is not fulfilled.
【００１４】ところが、図３に示す従来の感圧スイッチ
では、導電部材２１、２１′に可撓性導体２２、２２′
が挿通されているため、わん曲に追従できるだけの伸張
性が得られず、わん曲によって空隙２４がつぶれてしま
い、導電部材２１、２１′が接触して導通状態となって
しまうのである。However, in the conventional pressure sensitive switch shown in FIG. 3, the flexible conductors 22 and 22 'are attached to the conductive members 21 and 21'.
Since it is inserted, the expandability that can follow the bending is not obtained, and the void 24 is crushed by the bending, and the conductive members 21 and 21 'come into contact with each other and become conductive.
【００１５】[0015]
【実施例】以下、図面により、本考案を更に詳細に説明
する。図１は、本発明の感圧スイッチの一例を示す斜視
図であり、１、１′は導電部材、２、２′はそれぞれ導
電部材に挿通した可撓性部材、３は弾性導電部材、４は
導電部材１、１′と弾性導電部材３との間に形成した空
隙、５は全体を被覆した弾性絶縁部材である。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail below with reference to the drawings. FIG. 1 is a perspective view showing an example of the pressure-sensitive switch of the present invention, in which 1 and 1'are conductive members, 2 and 2'are flexible members inserted through the conductive members, 3 are elastic conductive members, and 4 respectively. Is a space formed between the conductive members 1 and 1'and the elastic conductive member 3, and 5 is an elastic insulating member that covers the entire space.
【００１６】可撓性導体２、２′を挿通した一対の導電
部材１、１′は、互いに絶縁された状態で平行に配列さ
れており、該一対の導電部材１、１′と対向して、該導
電部材１、１′とは絶縁された弾性導電部材３が、空隙
４を介して配置されている。A pair of conductive members 1 and 1'through which the flexible conductors 2 and 2'are inserted are arranged in parallel in a mutually insulated state, and are opposed to the pair of conductive members 1 and 1 '. An elastic conductive member 3 which is insulated from the conductive members 1 and 1 ′ is arranged via a gap 4.
【００１７】導電部材１、１′としては、Ｃ又はＮｉ、
Ａｇ、Ｐｔ等の金属粉末を含む天然ゴム、合成ゴムが用
いられ、通常はＣ含有シリコーンゴムが用いられる。ま
た、可撓性導体２、２′としては、電線用芯線、リン青
銅などの導電物質からなる板状導体を挙げることがで
き、特に複数本の導体線からなる撚り線が好ましく用い
られる。弾性導電部材３としては、導電部材１、１′に
用いた弾性体と同じものが用いられ、通常はＣ含有シリ
コーンゴムが用いられる。As the conductive members 1 and 1 ', C or Ni,
Natural rubber or synthetic rubber containing metal powder such as Ag or Pt is used, and C-containing silicone rubber is usually used. Examples of the flexible conductors 2 and 2'include core wires for electric wires and plate conductors made of a conductive material such as phosphor bronze, and twisted wires made of a plurality of conductor wires are preferably used. As the elastic conductive member 3, the same elastic body as that used for the conductive members 1 and 1'is used, and usually C-containing silicone rubber is used.
【００１８】更に、弾性絶縁部材５としては、エチレン
−プロピレンゴム、クロロプレンゴム、ニトリルゴム、
シリコーンゴム等の合成ゴム類が通常用いられ、特にシ
リコーンゴムが好ましく用いられる。Further, as the elastic insulating member 5, ethylene-propylene rubber, chloroprene rubber, nitrile rubber,
Synthetic rubbers such as silicone rubber are usually used, and silicone rubber is particularly preferably used.
【００１９】導電部材１、１′と弾性導電部材３との互
いに対向する面には、加圧により両者が接触した後、圧
力が解放されて元の形状に復元する際に両者の剥離を容
易にするため、凹凸６を形成しておくのが望ましい。The surfaces of the conductive members 1 and 1'and the elastic conductive member 3 which face each other are easily separated when the pressure is released and the original shape is restored after the pressure contact between them. Therefore, it is desirable to form the unevenness 6 in advance.
【００２０】空隙４の大きさ、即ち導電部材１、１′の
表面と弾性導電部材３の表面との間隔は、使用目的に応
じて適宜選定すればよいが、通常は０．５〜５．０ｍｍ
程度とすればよい。The size of the void 4, that is, the distance between the surfaces of the conductive members 1 and 1'and the surface of the elastic conductive member 3 may be appropriately selected according to the purpose of use, but is usually 0.5 to 5. 0 mm
It should be about.
【００２１】また、一対の導電部材１、１′を互いに絶
縁している弾性絶縁部材を一部５ａを、スイッチに圧力
が加わった場合は容易に変形するが、わん曲しただけで
は変形しない程度の厚さ、例えば０．５〜５．０ｍｍで
空隙４内に突出させておくと、スイッチをわん曲状態で
使用する際に空隙４がつぶれるのを防ぐことができるの
で好ましい。Further, the elastic insulating member which insulates the pair of conductive members 1 and 1'from each other is easily deformed when a part of the elastic insulating member 5a is applied to the switch, but is not deformed only by bending. It is preferable to have a thickness of, for example, 0.5 to 5.0 mm so as to project into the space 4 because it can prevent the space 4 from being crushed when the switch is used in a curved state.
【００２２】このスイッチに圧力が加わると、空隙４が
つぶれて、一対の導電部材１、１′と弾性導電部材３と
が接触し、導電部材１と導電部材１′とが弾性導電部材
３を介して導通し、可撓性導体２、２′のいずれか一方
から他方へ電流が流れる。圧力が解放されると、弾性絶
縁部材５の復元力により空隙４が元の形状に復元し、導
電部材１、１′と弾性導電部材３とが離れ、導電部材１
と導電部材１′との導通状態が解除される。When pressure is applied to this switch, the gap 4 is crushed, the pair of conductive members 1, 1'and the elastic conductive member 3 contact each other, and the conductive member 1 and the conductive member 1'separate the elastic conductive member 3. Conduction is conducted through the flexible conductors 2 and 2 ', and a current flows from one of the flexible conductors 2 and 2'to the other. When the pressure is released, the void 4 is restored to its original shape by the restoring force of the elastic insulating member 5, the conductive members 1, 1 ′ and the elastic conductive member 3 are separated, and the conductive member 1
The conductive state between the conductive member 1'and the conductive member 1'is released.
【００２３】このスイッチをわん曲した状態で使用する
場合は、弾性導電部材５が位置する側を外側にしてわん
曲させれば、その変形に応じて弾性導電部材５が伸張
し、空隙４がつぶれるようなことはない。特に、導電部
材１、１′を互いに絶縁している弾性絶縁部材の一部５
ａを、空隙４内に突出させている場合は、空隙４がつぶ
れるのを防ぐ効果が更に大きくなる。When this switch is used in a bent state, if the side where the elastic conductive member 5 is located is bent outward, the elastic conductive member 5 expands in accordance with the deformation and the void 4 is formed. There is no such thing as a crush. In particular, a part 5 of the elastic insulating member that insulates the conductive members 1, 1'from each other.
When a is projected into the void 4, the effect of preventing the void 4 from collapsing is further enhanced.
【００２４】例えば、導電部材及び弾性導電部材とし
て、硬さ７０の加熱硬化型Ｃ含有導電シリコーンゴム
（体積抵抗率３〜５Ω・ｃｍ）、弾性絶縁部材として、
硬さ７０の加熱硬化型シリコーンゴムを用い、可撓性導
体としては、直径０．０５ｍｍの素導体線を３４本撚り
合わせたものを使用して、予め、可撓性導体を通した導
電部材、弾性導電部材及び弾性絶縁部材の同時押出成形
を行ない、加熱硬化させると、図１及び図２に示すよう
な感圧スイッチが得られる。For example, as the conductive member and the elastic conductive member, a thermosetting C-containing conductive silicone rubber having a hardness of 70 (volume resistivity 3 to 5 Ω · cm), and as the elastic insulating member,
A heat-curable silicone rubber having a hardness of 70 is used, and as the flexible conductor, 34 element conductor wires having a diameter of 0.05 mm are twisted together. When the elastic conductive member and the elastic insulating member are simultaneously extruded and cured by heating, a pressure sensitive switch as shown in FIGS. 1 and 2 is obtained.
【００２５】[0025]
【発明の効果】本発明の感圧スイッチによれば、いずれ
の方向への屈曲性に対しても優れており、かつ局部的な
加圧に対しても復元力が強く、加圧後、元の形状に復元
せずに無加圧状態で電流が流れるという問題は起こらな
い。According to the pressure-sensitive switch of the present invention, it is excellent in flexibility in any direction, and has a strong restoring force against local pressure. There is no problem that the current flows in the non-pressurized state without restoring the shape.
【００２６】また、本発明の感圧スイッチは、わん曲し
た状態で使用しても、空隙がつぶれて一対の導電部材が
導通し、スイッチが作動してしまうという問題は起こら
ず、自動車のバンパーなどのようなわん曲面に取り付け
て使用することができる。Further, even if the pressure-sensitive switch of the present invention is used in a bent state, there is no problem that the gap is crushed and the pair of conductive members are conducted, and the switch is activated, and the bumper of an automobile is not affected. It can be used by attaching it to a curved surface such as.
【図１】本発明の感圧スイッチの一例を示す斜視図であ
る。FIG. 1 is a perspective view showing an example of a pressure-sensitive switch of the present invention.
【図２】従来の感圧スイッチの一例を示す斜視図であ
る。FIG. 2 is a perspective view showing an example of a conventional pressure sensitive switch.
【図３】従来の感圧スイッチの他の例を示す斜視図であ
る。FIG. 3 is a perspective view showing another example of a conventional pressure sensitive switch.
１、１′ 導電部材 ２、２′ 可撓性部材 ３ 弾性導電部材 ４ 空隙 ５ 弾性絶縁部材 1, 1'conductive member 2, 2'flexible member 3 elastic conductive member 4 void 5 elastic insulating member
Claims (5)
互いに絶縁した状態で平行に配列し、該一対の導電部材
と対向して、該一対の導電部材とは絶縁された弾性導電
部材を空隙を介して配置し、全体を弾性絶縁部材で被覆
したことを特徴とする感圧スイッチ。1. An elastic conductive member in which a pair of conductive members inserted with a flexible conductor are arranged in parallel in a state of being insulated from each other, facing the pair of conductive members and insulated from the pair of conductive members. A pressure-sensitive switch, characterized in that it is disposed through a gap and is entirely covered with an elastic insulating member.
り線である請求項１記載の感圧スイッチ。2. The pressure-sensitive switch according to claim 1, wherein the flexible conductor is a stranded wire composed of a plurality of conductor wires.
求項１記載の感圧スイッチ。3. The pressure sensitive switch according to claim 1, wherein the conductive member is a conductive silicone rubber.
る請求項１記載の感圧スイッチ。4. The pressure-sensitive switch according to claim 1, wherein the elastic conductive member is conductive silicone rubber.
求項１記載の感スイッチ。5. The sense switch according to claim 1, wherein the elastic insulating member is silicone rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31436793A JPH07141958A (en) | 1993-11-19 | 1993-11-19 | Pressure sensitive switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31436793A JPH07141958A (en) | 1993-11-19 | 1993-11-19 | Pressure sensitive switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH07141958A true JPH07141958A (en) | 1995-06-02 |
Family
ID=18052488
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31436793A Pending JPH07141958A (en) | 1993-11-19 | 1993-11-19 | Pressure sensitive switch |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07141958A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5728983A (en) * | 1995-12-27 | 1998-03-17 | Asmo Co., Ltd. | Elongated tube-like pressure sensitive cable switch |
| JP2001060423A (en) * | 1999-08-23 | 2001-03-06 | Bridgestone Corp | Pressure sensitive switch |
| JP2001174348A (en) * | 1999-12-21 | 2001-06-29 | Sumitomo Wiring Syst Ltd | Pressure sensor |
| EP0774558B1 (en) * | 1995-08-04 | 2002-03-20 | Bridgestone Corporation | Cord switch |
| US7150179B2 (en) | 2003-10-29 | 2006-12-19 | Denso Corporation | Impact sensor for detecting an impact of a collision |
| JP2007035586A (en) * | 2005-07-29 | 2007-02-08 | Bridgestone Corp | Mat switch |
| USD920925S1 (en) * | 2017-12-26 | 2021-06-01 | Omron Corporation | Push switch |
-
1993
- 1993-11-19 JP JP31436793A patent/JPH07141958A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0774558B1 (en) * | 1995-08-04 | 2002-03-20 | Bridgestone Corporation | Cord switch |
| US5728983A (en) * | 1995-12-27 | 1998-03-17 | Asmo Co., Ltd. | Elongated tube-like pressure sensitive cable switch |
| JP2001060423A (en) * | 1999-08-23 | 2001-03-06 | Bridgestone Corp | Pressure sensitive switch |
| JP2001174348A (en) * | 1999-12-21 | 2001-06-29 | Sumitomo Wiring Syst Ltd | Pressure sensor |
| US7150179B2 (en) | 2003-10-29 | 2006-12-19 | Denso Corporation | Impact sensor for detecting an impact of a collision |
| JP2007035586A (en) * | 2005-07-29 | 2007-02-08 | Bridgestone Corp | Mat switch |
| USD920925S1 (en) * | 2017-12-26 | 2021-06-01 | Omron Corporation | Push switch |
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