JP4323795B2

JP4323795B2 - Switch device

Info

Publication number: JP4323795B2
Application number: JP2002373193A
Authority: JP
Inventors: 幸則藤川; 康成武富
Original assignee: Panasonic Corp; Matsushita Electric Works Ltd
Current assignee: Panasonic Corp; Panasonic Electric Works Co Ltd
Priority date: 2002-12-24
Filing date: 2002-12-24
Publication date: 2009-09-02
Anticipated expiration: 2022-12-24
Also published as: JP2004206976A

Description

【０００１】
【発明の属する技術分野】
本発明は、スイッチ装置に関するものである。
【０００２】
【従来の技術】
スイッチ装置の第１の従来例として図６〜図９に示すものがある。図６は側面図、図７は正面図、図８は上面図、図９は側面断面図を示している。この第１の従来例は、函体に形成された樹脂のケース１０１の内部に接点機構を収容し、下面にコモン端子１０２ａ、常開端子１０２ｂ、常閉端子１０２ｃを３つ並んで形成し、上面には接点機構の接点状態を切り換えるための操作部１０３を備える。
【０００３】
操作部１０３は棒状に形成されて、ケース１０１の上面に挿通し、周縁部をケース１０１に取着したカバー１２３によって、その上端を露出するように覆われている。
【０００４】
ケース１０１内部には、常開固定接点１０４、常閉固定接点１０５、可動片１０６、可動接点１０７、支持片１０８、ヒンジレバー１０９、コイルばね１１０が収容されており、反転方式の接点機構を構成している。常開固定接点１０４及び常閉固定接点１０５は上下方向に対向配置されて、長尺状に形成された可動片１０６の先端部に設けられた可動接点１０７が常開固定接点１０４と常閉固定接点１０５との間に位置するように、可動片１０６の基端部をケース１０１の底面上に立設した支持片１０８に取着している。常開固定接点１０４は常開端子１０２ｂに接続し、常閉固定接点１０５は常閉端子１０２ｃに接続して、可動接点１０７は可動片１０６を介してコモン端子１０２ａに接続している。
【０００５】
ヒンジレバー１０９は長尺状に形成されてその基端部をケース１０１に支持され、基端部を枢支点として上下方向に回動自在に構成され、ヒンジレバー１０９の先端部と可動片１０６とはコイルばね１１０で接続される。そしてコイルばね１１０のばね力によって、ヒンジレバー１０９の先端部は操作部１０３の下端に当接した状態に支持され、操作部１０３が押下されていない場合、可動片１０６は可動接点１０７が常閉固定接点１０５に当接する状態に支持されており、常閉端子１０２ｃ−コモン端子１０２ａ間が導通する。
【０００６】
次に、上記従来のスイッチ装置の動作について説明する。操作部１０３の上端が押下されると、操作部１０３の下端がヒンジレバー１０９の先端部を押圧し、ヒンジレバー１０９はコイルばね１１０のばね力に抗しながら反時計回りに回動する。すると、コイルばね１１０が変形することで可動片１０６が反転動作を行い、可動片１０６の先端部に設けられた可動接点１０７が常閉固定接点１０５から開離し、常開固定接点１０４に当接して、常開端子１０２ｂ−コモン端子１０２ａ間が導通する。
【０００７】
そして、操作部１０３への押下力を取り除くと、ヒンジレバー１０９はコイルばね１１０のばね力によって時計回りに回動し、操作部１０３は上方向に移動すると共に、可動片１０６が逆方向へ反転動作を行い、可動接点１０７が常開固定接点１０４から開離し、常閉固定接点１０５に当接して、常閉端子１０２ｃ−コモン端子１０２ａ間が導通している状態に戻る。
【０００８】
次に、接点機構を摺動接点方式とした第２の従来例の側面断面図を図１０に示す。この第２の従来例は、函体に形成された樹脂のケース２０１の内部に接点機構を収容し、下面にコモン端子２０２ａ、常開端子２０２ｂ、常閉端子２０２ｃを３つ並んで形成し、上面には接点機構の接点状態を切り換えるための操作部２０３を備える。操作部２０３は棒状に形成されて、ケース２０１の上面に挿通し、周縁部をケース２０１に取着したカバー２２３によって覆われている。
【０００９】
そしてアクチュエータ２２４が図示せぬ被検出体に押圧駆動されておらず、操作部２０３が押し込み操作されていないときには、可動接点２０７が常閉固定接点２０５に当接しており、常閉固定接点２０５、可動接点２０７、コイルばね２１０、及びコモン接点２０６を介して、常閉端子２０２ｃ−コモン端子２０２ａ間が導通する。
【００１０】
しかし、被検出体に押圧駆動されたアクチュエータ２２４が時計回り方向へ回転すると、このアクチュエータ２２４はカバー２２３を介して摺動部２０８を下方へ向けて押し込むので、摺動部２０８が所定ストローク押し込み操作された時点で、可動接点２０７が常閉固定接点２０５から開離し、常開固定接点２０４に当接して、常開端子２０２ｂ−コモン端子２０２ａ間が導通する。
【００１１】
そして、操作部２０３への押し込み操作力を取り除くと、摺動部２０８はコイルばね２１０のばね力によって上方向に摺動すると共に、可動接点２０７が常開固定接点２０４から開離し、常閉固定接点２０５に当接して、常閉端子２０２ｃ−コモン端子２０２ａ間が導通している状態に戻る。（例えば、特許文献１参照。）
【００１２】
【特許文献１】
特開平７−６６６１号公報（３頁右欄第２２行〜４頁左欄第８行、図１）
【００１３】
【発明が解決しようとする課題】
このようなスイッチ装置は取り付け側部品等の構造物に取り付けられるものであって、上記第１の従来例に示されるスイッチ装置は、ケース１０１の両側面には円柱状の突起からなるボス１２１ａ，１２１ｂが各々形成され、ケース１０１の側面端部には取り付け孔１２２が穿設されており、構造物の取付面に形成した孔部にボス１２１ａまたは１２１ｂを挿入して位置決めを行った後、取り付け孔１２２に固定用のネジ（図示無し）を挿通させて締め付けることで構造物に螺設される。
【００１４】
また、ケース１０１の取り付け孔１２２は接点機構との干渉を防止するため、接点機構の外側に設けられており、ケース１０１の外径形状が大きくなってしまう。その対策として、取り付け孔１２２の径を小さくすることで外形寸法を小さくする手段があるが、固定用ネジの径も小さくなるため、ネジ締め強度及び固定強度の低下や、ネジ締め作業性の悪化という問題が発生する。特に自動車関連用途では強度や作業性を考慮して、固定用ネジのサイズはＭ３以上としたいという要望が多い。
【００１５】
上記第２の従来例に示されるスイッチ装置はその接点機構に摺動接点方式を用いており、反転方式で必要な長尺状に形成された可動片及びヒンジレバーを省略できて、接点機構の小型化を図ることができる。しかし、ケース２０１の取り付け孔２２２を挿通する固定用ネジ締め付け時の圧縮力や、構造物の取付面に位置決め用の孔部を穿設した際に生じる抜きバリによって、ケース２０１の側面内側への変形が生じ、ケース２０１と接点機構とが干渉して動作異常が発生するという問題点がある。
【００１６】
本発明は、上記事由に鑑みてなされたものであり、その目的は、固定用ネジのサイズを小さくすることなく外形寸法を小さくした信頼性の高いスイッチ装置を提供することにある。
【００１７】
【課題を解決するための手段】
請求項１の発明は、外郭を形成するケースと、外部からの操作によって前記ケース内を両端方向に摺動自在に移動する摺動部と、前記摺動部に取着した可動接点と、前記ケース内に収容されて一端側に摺動した前記可動接点が当接する位置に設けられた常開固定接点と、前記ケース内に収容されて他端側に摺動した前記可動接点が当接する位置に設けられた常閉固定接点とを備え、前記ケースは、ケースを取り付ける構造物に設けられた孔部に挿入される突起と、構造物に固定するためのネジを挿通させるネジ孔と、前記突起が設けられた面に形成されて構造物が当接する当接部と、前記当接部と突起との間に形成されて、前記摺動部の可動範囲に対向する矩形状の凹部とを備えることを特徴とする。
【００１８】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【００１９】
本実施形態のスイッチ装置の構成は図１〜図４に示され、図１は側面図、図２は正面図、図３は上面図、図４は側面断面図を示している。この本実施形態のスイッチ装置は、函体に形成された樹脂のケース１の内部に接点機構を収容し、下面にコモン端子２ａ、常開端子２ｂ、常閉端子２ｃを３つ並んで形成し、上面には接点機構の接点状態を切り換えるための操作部３を備える。
【００２０】
操作部３は棒状に形成されて、ケース１の上面に挿通し、周縁部をケース１に取着したカバー２３によって、その上端を露出するように覆われている。
【００２１】
ケース１内部には、常開固定接点４、常閉固定接点５、摺動部６、可動接点板７、可動接点８、コイルばね９が収容されており、摺動接点方式の接点機構を構成している。摺動部６は操作部３の下端に設けられて、操作部３の移動方向にケース１の内壁に沿って摺動し、その側面はケース１の内壁に摺動する摺動面６ａとなる。摺動部６から正面方向に向かって可動接点板７が取着されており、可動接点板７の先端には可動接点８が形成されている。そして摺動部６の下端とケース１の底面との間にはコイルばね９が配されており、コイルばね９の上端は可動接点板７に接続され、下端はコモン端子２ａに連続したコモン端子片２０ａに接続される。すなわちコモン端子２ａは、コモン端子片２０ａ、コイルばね９、可動接点板７を介して可動接点８に接続されている。
【００２２】
操作部３の押下操作によって上下方向に移動する可動接点８に対向して常開固定接点４及び常閉固定接点５が上下方向に並設されており、常開固定接点４は、操作部３が押下された時に下端側に所定ストローク移動した可動接点８が当接する位置に設けられ、常閉固定接点５は、操作部３が押下されていない時にケース１の上端側に位置する可動接点８が当接する位置に設けられており、常開端子２ｂは常開固定接点４に接続し、常閉端子２ｃはケース１の正面側の内壁に沿って常閉固定端子５に接続している。
【００２３】
次に、上記本実施形態のスイッチ装置の動作について説明する。コイルばね９は操作部３の押下方向とは反対方向にばね力を付勢しており、操作部３が押下されていない場合、摺動部６はケース１の上端側に係止しており、可動接点８が常閉固定接点５に当接して、常閉端子２ｃ−コモン端子２ａ間が導通する。
【００２４】
操作部３の上端が押下されると、摺動部６は下方向に摺動し、所定ストロークの押下操作が行われた時点で、可動接点８が常閉固定接点５から開離して常開固定接点４に当接し、常開端子２ｂ−コモン端子２ａ間が導通する。
【００２５】
そして、操作部３への押下力を取り除くと、摺動部６はコイルばね９のばね力によって上方向に摺動すると共に、可動接点８が常開固定接点４から開離し、常閉固定接点５に当接して、常閉端子２ｃ−コモン端子２ａ間が導通している状態に戻る。
【００２６】
本実施形態のスイッチ装置はその接点機構を摺動接点方式としており、第１の従来例で説明した反転方式と比較して長尺状に形成された可動片及びヒンジレバーを省略でき、接点機構の小型化を図っている。
【００２７】
このようなスイッチ装置は取り付け側部品等の構造物に取り付けられるものであって、ケース１の両側面には円柱状の突起からなるボス２１ａ，２１ｂが各々形成され、ケース１の側面端部には取り付け孔２２が穿設されており、構造物の取付面に形成した孔部にボス２１ａまたは２１ｂを挿入して位置決めを行った後、取り付け孔２２に固定用のネジ（図示無し）を挿通させて締め付けることで構造物に螺設される。
【００２８】
ここで、本実施形態では上記のように接点機構の小型化を図っているので、取り付け孔２２の径を小さくしなくてもスイッチ装置全体の外形寸法を小さくすることができ、例えば従来と同様に固定用ネジとしてＭ３のサイズのものを用いることができる。
【００２９】
ここで、図５は図１のＡ−Ａ断面図であって、ボス２１ａ，２１ｂ付近の断面図を示す。ケース１の側面では、ボス２１ａ，２１ｂの周辺に矩形状の凹部２４を形成しており（逃がし形状）、固定用ネジ締め付け時の圧縮力によるケース内側への変形が生じず、内部の接点機構とケース１とが干渉して動作異常となることを防ぐ。特に本実施形態においては、凹部２４は摺動部６の可動範囲に対向しており、摺動部６とケース１の内面との干渉を防いで摺動動作の信頼性、安定性を向上させている。
【００３０】
さらに凹部２４はボス２１ａ，２１ｂの周辺に形成されており、ケース１を構造物の取付面に取り付けるときに凹部２４は取付面に当接しない。したがって、金属等の構造物の取付面にボス２１ａまたはボス２１ｂを挿入する孔部を穿設した際に孔部の周縁に生じた抜きバリが、ケース１の側面を圧縮、変形させることを防ぐことができる。
【００３１】
【発明の効果】
請求項１の発明は、外郭を形成するケースと、外部からの操作によって前記ケース内を両端方向に摺動自在に移動する摺動部と、前記摺動部に取着した可動接点と、前記ケース内に収容されて一端側に摺動した前記可動接点が当接する位置に設けられた常開固定接点と、前記ケース内に収容されて他端側に摺動した前記可動接点が当接する位置に設けられた常閉固定接点とを備え、前記ケースは、ケースを取り付ける構造物に設けられた孔部に挿入される突起と、構造物に固定するためのネジを挿通させるネジ孔と、前記突起が設けられた面に形成されて構造物が当接する当接部と、前記当接部と突起との間に形成されて、前記摺動部の可動範囲に対向する矩形状の凹部とを備えるので、接点機構の小型化を図ることで固定用ネジのサイズを小さくすることなく外形寸法を小さくできる。さらにケースに形成した凹部では固定用ネジで締め付けた時に圧縮力による内側への変形が生じず、ケースと接点機構とが干渉して動作異常となることを防ぐことができると共に、凹部は位置決め用の突起の周辺に形成されているので、構造物の取付面に位置決め用の孔部を穿設した際に生じる抜きバリが、構造物の取付面に当接するケース面を圧縮、変形させることも防ぐことができ、信頼性を向上させることができるという効果がある。
【図面の簡単な説明】
【図１】本発明の実施形態１を示す側面図である。
【図２】同上を示す正面図である。
【図３】同上を示す上面図である。
【図４】同上を示す側面断面図である。
【図５】図１のＡ−Ａ断面図である。
【図６】第１の従来例を示す側面図である。
【図７】同上を示す正面図である。
【図８】同上を示す上面図である。
【図９】同上を示す側面断面図である。
【図１０】第２の従来例を示す側面断面図である。
【符号の説明】
１ケース
２ａコモン端子
２ｂ常開端子
２ｃ常閉端子
３操作部
４常開固定接点
５常閉固定接点
６摺動部
７可動接点板
８可動接点
９コイルばね[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a switch device.
[0002]
[Prior art]
As a first conventional example of the switch device, there is one shown in FIGS. 6 is a side view, FIG. 7 is a front view, FIG. 8 is a top view, and FIG. 9 is a side sectional view. In this first conventional example, a contact mechanism is accommodated inside a resin case 101 formed in a box, and three common terminals 102a, normally open terminals 102b, and normally closed terminals 102c are formed side by side on the lower surface. An operation unit 103 for switching the contact state of the contact mechanism is provided on the upper surface.
[0003]
The operation unit 103 is formed in a rod shape, and is covered with a cover 123 that is inserted into the upper surface of the case 101 and has a peripheral edge attached to the case 101 so that the upper end thereof is exposed.
[0004]
The case 101 contains a normally open fixed contact 104, a normally closed fixed contact 105, a movable piece 106, a movable contact 107, a support piece 108, a hinge lever 109, and a coil spring 110, and constitutes a reversing contact mechanism. is doing. The normally-open fixed contact 104 and the normally-closed fixed contact 105 are opposed to each other in the vertical direction, and the movable contact 107 provided at the tip of the elongated movable piece 106 is fixed to the normally-open fixed contact 104 and normally closed. The base end portion of the movable piece 106 is attached to a support piece 108 erected on the bottom surface of the case 101 so as to be positioned between the contact point 105. The normally open fixed contact 104 is connected to the normally open terminal 102 b, the normally closed fixed contact 105 is connected to the normally closed terminal 102 c, and the movable contact 107 is connected to the common terminal 102 a via the movable piece 106.
[0005]
The hinge lever 109 is formed in a long shape, and its base end is supported by the case 101. The hinge lever 109 is configured to be rotatable in the vertical direction with the base end serving as a pivot point. The tip of the hinge lever 109, the movable piece 106, Are connected by a coil spring 110. The tip of the hinge lever 109 is supported by the spring force of the coil spring 110 in contact with the lower end of the operation unit 103. When the operation unit 103 is not depressed, the movable piece 106 has the movable contact 107 normally closed. The contact between the normally closed terminal 102c and the common terminal 102a is conducted.
[0006]
Next, the operation of the conventional switch device will be described. When the upper end of the operation unit 103 is pressed, the lower end of the operation unit 103 presses the tip of the hinge lever 109, and the hinge lever 109 rotates counterclockwise while resisting the spring force of the coil spring 110. Then, when the coil spring 110 is deformed, the movable piece 106 performs a reversing operation, and the movable contact 107 provided at the tip of the movable piece 106 is separated from the normally closed fixed contact 105 and contacts the normally open fixed contact 104. Thus, the normally open terminal 102b and the common terminal 102a are electrically connected.
[0007]
When the pressing force on the operation unit 103 is removed, the hinge lever 109 is rotated clockwise by the spring force of the coil spring 110, the operation unit 103 is moved upward, and the movable piece 106 is reversed in the reverse direction. The operation is performed, the movable contact 107 is separated from the normally-open fixed contact 104, abuts against the normally-closed fixed contact 105, and the normally-closed terminal 102c and the common terminal 102a return to the conductive state.
[0008]
Next, FIG. 10 shows a side sectional view of a second conventional example in which the contact mechanism is a sliding contact type. In this second conventional example, a contact mechanism is accommodated inside a resin case 201 formed in a box, and three common terminals 202a, normally open terminals 202b, and normally closed terminals 202c are formed side by side on the bottom surface. An operation unit 203 for switching the contact state of the contact mechanism is provided on the upper surface. The operation unit 203 is formed in a rod shape and is covered with a cover 223 that is inserted into the upper surface of the case 201 and has a peripheral edge attached to the case 201.
[0009]
When the actuator 224 is not pressed against a detection object (not shown) and the operation unit 203 is not pushed, the movable contact 207 is in contact with the normally closed fixed contact 205, and the normally closed fixed contact 205, The normally closed terminal 202c and the common terminal 202a conduct through the movable contact 207, the coil spring 210, and the common contact 206.
[0010]
However, when the actuator 224 driven to be pressed by the detection object rotates in the clockwise direction, the actuator 224 pushes the sliding portion 208 downward through the cover 223, so that the sliding portion 208 performs a predetermined stroke pushing operation. At this point, the movable contact 207 is separated from the normally closed fixed contact 205 and comes into contact with the normally open fixed contact 204, so that the normally open terminal 202b and the common terminal 202a are electrically connected.
[0011]
When the pushing operation force to the operation portion 203 is removed, the sliding portion 208 slides upward due to the spring force of the coil spring 210, and the movable contact 207 is separated from the normally open fixed contact 204, and is normally closed fixed. It contacts the contact 205 and returns to the state where the normally closed terminal 202c and the common terminal 202a are electrically connected. (For example, refer to Patent Document 1.)
[0012]
[Patent Document 1]
Japanese Patent Laid-Open No. 7-6661 (page 3, right column, line 22 to page 4, left column, line 8, line 1)
[0013]
[Problems to be solved by the invention]
Such a switch device is attached to a structure such as an attachment-side component, and the switch device shown in the first conventional example has bosses 121a made of cylindrical protrusions on both side surfaces of the case 101. 121b is formed, and a mounting hole 122 is formed in a side end portion of the case 101. After positioning by inserting the boss 121a or 121b into the hole formed in the mounting surface of the structure, the mounting is performed. A fixing screw (not shown) is inserted into the hole 122 and tightened to be screwed into the structure.
[0014]
Further, the mounting hole 122 of the case 101 is provided outside the contact mechanism in order to prevent interference with the contact mechanism, and the outer diameter shape of the case 101 becomes large. As a countermeasure, there is a means for reducing the outer dimension by reducing the diameter of the mounting hole 122. However, since the diameter of the fixing screw is also reduced, the screw tightening strength and the fixing strength are reduced, and the screw tightening workability is deteriorated. The problem occurs. Particularly in automobile-related applications, there are many requests that the size of the fixing screw be M3 or more in consideration of strength and workability.
[0015]
The switch device shown in the second conventional example uses a sliding contact method for the contact mechanism, and can eliminate the movable piece and the hinge lever that are formed in a long shape by the reversal method. Miniaturization can be achieved. However, due to the compressive force at the time of tightening the fixing screw that passes through the mounting hole 222 of the case 201 and the removal burr that occurs when the positioning hole is drilled on the mounting surface of the structure, There is a problem that deformation occurs, and the case 201 and the contact mechanism interfere with each other to cause an abnormal operation.
[0016]
The present invention has been made in view of the above-described reasons, and an object of the present invention is to provide a highly reliable switch device in which the external dimensions are reduced without reducing the size of the fixing screw.
[0017]
[Means for Solving the Problems]
The invention of claim 1 includes a case that forms an outer shell, a sliding part that slidably moves in both ends in the case by an external operation, a movable contact that is attached to the sliding part, A normally-open fixed contact provided at a position where the movable contact accommodated in the case and slid toward one end contacts a position where the movable contact accommodated in the case and slid toward the other end contacts The case is provided with a normally closed fixed contact, and the case includes a protrusion inserted into a hole provided in a structure to which the case is attached, a screw hole through which a screw for fixing to the structure is inserted, A contact portion that is formed on a surface provided with a protrusion and contacts a structure; and a rectangular recess that is formed between the contact portion and the protrusion and faces a movable range of the sliding portion. It is characterized by providing.
[0018]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0019]
The configuration of the switch device of this embodiment is shown in FIGS. 1 to 4, wherein FIG. 1 is a side view, FIG. 2 is a front view, FIG. 3 is a top view, and FIG. The switch device according to the present embodiment accommodates a contact mechanism inside a resin case 1 formed in a box, and has three common terminals 2a, normally open terminals 2b, and normally closed terminals 2c arranged side by side on the lower surface. The upper surface includes an operation unit 3 for switching the contact state of the contact mechanism.
[0020]
The operation portion 3 is formed in a rod shape, and is covered with a cover 23 that is inserted into the upper surface of the case 1 and has a peripheral edge attached to the case 1 so that the upper end thereof is exposed.
[0021]
The case 1 contains a normally open fixed contact 4, a normally closed fixed contact 5, a sliding portion 6, a movable contact plate 7, a movable contact 8, and a coil spring 9, and constitutes a sliding contact type contact mechanism. is doing. The sliding portion 6 is provided at the lower end of the operation portion 3 and slides along the inner wall of the case 1 in the moving direction of the operation portion 3, and its side surface becomes a sliding surface 6 a that slides on the inner wall of the case 1. . A movable contact plate 7 is attached from the sliding portion 6 toward the front, and a movable contact 8 is formed at the tip of the movable contact plate 7. A coil spring 9 is disposed between the lower end of the sliding portion 6 and the bottom surface of the case 1, the upper end of the coil spring 9 is connected to the movable contact plate 7, and the lower end is a common terminal connected to the common terminal 2 a. Connected to the piece 20a. That is, the common terminal 2 a is connected to the movable contact 8 via the common terminal piece 20 a, the coil spring 9, and the movable contact plate 7.
[0022]
A normally open fixed contact 4 and a normally closed fixed contact 5 are arranged in parallel in the vertical direction so as to face the movable contact 8 that moves in the vertical direction when the operation unit 3 is pressed down. Is provided at a position where the movable contact 8 moved by a predetermined stroke toward the lower end side when is pressed, and the normally closed fixed contact 5 is located on the upper end side of the case 1 when the operation unit 3 is not pressed. The normally open terminal 2 b is connected to the normally open fixed contact 4, and the normally closed terminal 2 c is connected to the normally closed fixed terminal 5 along the inner wall on the front side of the case 1.
[0023]
Next, the operation of the switch device of the present embodiment will be described. The coil spring 9 urges a spring force in a direction opposite to the pressing direction of the operation portion 3. When the operation portion 3 is not pressed, the sliding portion 6 is locked to the upper end side of the case 1. The movable contact 8 comes into contact with the normally closed fixed contact 5, and the normally closed terminal 2c and the common terminal 2a are electrically connected.
[0024]
When the upper end of the operation unit 3 is pressed, the sliding unit 6 slides downward, and when a predetermined stroke pressing operation is performed, the movable contact 8 is separated from the normally closed fixed contact 5 and is normally opened. Abutting on the fixed contact 4, the normally open terminal 2b and the common terminal 2a are electrically connected.
[0025]
When the pressing force on the operation unit 3 is removed, the sliding unit 6 slides upward by the spring force of the coil spring 9, and the movable contact 8 is separated from the normally open fixed contact 4 so that the normally closed fixed contact is obtained. 5 is brought back into a state where the normally closed terminal 2c and the common terminal 2a are electrically connected.
[0026]
The switch device of the present embodiment has a sliding contact system as its contact mechanism, and can eliminate the movable piece and the hinge lever that are formed longer than the reversal system described in the first conventional example. Is miniaturized.
[0027]
Such a switch device is attached to a structure such as an attachment-side component, and bosses 21a and 21b made of columnar protrusions are formed on both side surfaces of the case 1, respectively. Has a mounting hole 22, and after positioning by inserting the boss 21a or 21b into the hole formed in the mounting surface of the structure, a fixing screw (not shown) is inserted into the mounting hole 22. The structure is screwed by tightening.
[0028]
Here, in the present embodiment, since the contact mechanism is downsized as described above, the overall dimensions of the switch device can be reduced without reducing the diameter of the mounting hole 22, for example, as in the conventional case. A fixing screw having a size of M3 can be used.
[0029]
Here, FIG. 5 is a cross-sectional view taken along the line AA of FIG. 1 and shows a cross-sectional view in the vicinity of the bosses 21a and 21b. On the side surface of the case 1, rectangular recesses 24 are formed around the bosses 21a and 21b (relief shape), and the inner contact mechanism is not deformed by the compressive force when the fixing screw is tightened. And the case 1 are prevented from interfering with each other and causing abnormal operation. In particular, in the present embodiment, the recess 24 faces the movable range of the sliding portion 6 and prevents interference between the sliding portion 6 and the inner surface of the case 1 and improves the reliability and stability of the sliding operation. ing.
[0030]
Further, the recess 24 is formed around the bosses 21a and 21b, and the recess 24 does not contact the mounting surface when the case 1 is mounted on the mounting surface of the structure. Therefore, when a hole for inserting the boss 21a or the boss 21b is drilled on the mounting surface of a structure such as metal, a burr generated on the periphery of the hole prevents the side surface of the case 1 from being compressed and deformed. be able to.
[0031]
【The invention's effect】
The invention of claim 1 includes a case that forms an outer shell, a sliding part that slidably moves in both ends in the case by an external operation, a movable contact that is attached to the sliding part, A normally-open fixed contact provided at a position where the movable contact accommodated in the case and slid toward one end contacts a position where the movable contact accommodated in the case and slid toward the other end contacts The case is provided with a normally closed fixed contact, the case includes a protrusion inserted into a hole provided in a structure to which the case is attached, a screw hole through which a screw for fixing to the structure is inserted, A contact portion that is formed on a surface provided with a protrusion and contacts a structure; and a rectangular recess that is formed between the contact portion and the protrusion and faces a movable range of the sliding portion. The size of the fixing screw can be reduced by reducing the size of the contact mechanism. The outer dimensions without fences can be reduced. In addition, the recess formed in the case does not deform inward due to compressive force when tightened with a fixing screw, preventing the case and the contact mechanism from interfering with each other and preventing abnormal operation. The burr formed when a positioning hole is drilled on the mounting surface of the structure may compress and deform the case surface that contacts the mounting surface of the structure. It is possible to prevent this and improve the reliability.
[Brief description of the drawings]
FIG. 1 is a side view showing a first embodiment of the present invention.
FIG. 2 is a front view showing the same.
FIG. 3 is a top view showing the same.
FIG. 4 is a side sectional view showing the same.
FIG. 5 is a cross-sectional view taken along the line AA of FIG.
FIG. 6 is a side view showing a first conventional example.
FIG. 7 is a front view showing the same.
FIG. 8 is a top view showing the same.
FIG. 9 is a side sectional view showing the same.
FIG. 10 is a side sectional view showing a second conventional example.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Case 2a Common terminal 2b Normally open terminal 2c Normally closed terminal 3 Operation part 4 Normally open fixed contact 5 Normally closed fixed contact 6 Sliding part 7 Movable contact plate 8 Movable contact 9 Coil spring

Claims

A case that forms an outer shell, a sliding part that slidably moves in both ends in the case by an external operation, a movable contact that is attached to the sliding part, and one end that is housed in the case A normally open fixed contact provided at a position where the movable contact sliding to the side contacts, and a normally closed fixed provided at a position where the movable contact housed in the case and slid to the other end contacts The case has a protrusion inserted into a hole provided in a structure to which the case is attached, a screw hole through which a screw for fixing to the structure is inserted, and a surface provided with the protrusion. A switch comprising: a contact portion that is formed and contacted by a structure; and a rectangular recess that is formed between the contact portion and the protrusion and faces a movable range of the sliding portion. apparatus.