JP5119051B2 - Push button switch - Google Patents

Push button switch Download PDF

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Publication number
JP5119051B2
JP5119051B2 JP2008145766A JP2008145766A JP5119051B2 JP 5119051 B2 JP5119051 B2 JP 5119051B2 JP 2008145766 A JP2008145766 A JP 2008145766A JP 2008145766 A JP2008145766 A JP 2008145766A JP 5119051 B2 JP5119051 B2 JP 5119051B2
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fixed contact
contact
movable contact
fixed
movable
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JP2009295327A (en
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貴仁 佐藤
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
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Priority to JP2008145766A priority Critical patent/JP5119051B2/en
Priority to CN2009101639469A priority patent/CN101620944B/en
Priority to KR1020090048081A priority patent/KR101059402B1/en
Priority to DE102009023575A priority patent/DE102009023575B4/en
Publication of JP2009295327A publication Critical patent/JP2009295327A/en
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    • 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
    • H01H13/02—Details
    • H01H13/12—Movable parts; Contacts mounted thereon
    • H01H13/14—Operating parts, e.g. push-button
    • H01H13/18—Operating parts, e.g. push-button adapted for actuation at a limit or other predetermined position in the path of a body, the relative movement of switch and body being primarily for a purpose other than the actuation of the switch, e.g. door switch, limit switch, floor-levelling switch of a lift
    • 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
    • H01H13/02—Details
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/365—Bridging contacts
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H1/00—Contacts
    • H01H1/12—Contacts characterised by the manner in which co-operating contacts engage
    • H01H1/36—Contacts characterised by the manner in which co-operating contacts engage by sliding
    • H01H1/42—Knife-and-clip contacts
    • 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
    • H01H13/02—Details
    • H01H13/04—Cases; Covers
    • H01H13/06—Dustproof, splashproof, drip-proof, waterproof or flameproof casings
    • H01H13/063—Casings hermetically closed by a diaphragm through which passes an actuating member

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  • Push-Button Switches (AREA)
  • Rotary Switch, Piano Key Switch, And Lever Switch (AREA)
  • Contacts (AREA)

Description

本発明は、複数の固定接点に摺接可能な可動接点部材が操作部材に保持されており、この操作部材を押し込み操作することによって複数の固定接点間の導通状態を切換える押釦スイッチに関するものである。   The present invention relates to a pushbutton switch in which a movable contact member that can be slidably contacted with a plurality of fixed contacts is held by an operation member, and the conduction state between the plurality of fixed contacts is switched by pushing the operation member. .

この種の押釦スイッチは、操作部材に保持されて一体的に往復動する可動接点部材に複数の可動接点部が設けられており、復帰用弾性部材の付勢力に抗して操作部材が押し込み操作されると、ケース内に配設された第１固定接点としてのコモン固定接点と第２固定接点としての切換え固定接点に対して各可動接点部が摺動するようになっている。切換え固定接点は例えばＮＯ（ノーマルオープン）固定接点とＮＣ（ノーマルクローズ）固定接点とからなり、操作部材の非操作時には所定の可動接点部がＮＣ固定接点と摺接し、操作部材が所定ストローク押し込み操作されると、該可動接点部がＮＣ固定接点から離れてＮＯ固定接点と摺接する。また、この可動接点部と導通されている別の可動接点部がコモン固定接点に常時摺接している。そのため、操作部材の押し込み操作時に、切換え固定接点に対して所定の可動接点部を接離させることでオン・オフの接点切換えが行えるようになっている。   In this type of push button switch, a plurality of movable contact portions are provided on a movable contact member that is held by an operation member and reciprocates integrally, and the operation member is pushed against the urging force of the return elastic member. Then, each movable contact portion slides with respect to the common fixed contact as the first fixed contact and the switching fixed contact as the second fixed contact disposed in the case. The switching fixed contact is made up of, for example, a NO (normally open) fixed contact and an NC (normally closed) fixed contact. When the operation member is not operated, the predetermined movable contact portion is in sliding contact with the NC fixed contact, and the operation member is pushed by a predetermined stroke. Then, the movable contact portion is separated from the NC fixed contact and is in sliding contact with the NO fixed contact. Further, another movable contact portion that is electrically connected to the movable contact portion is always in sliding contact with the common fixed contact. For this reason, when the operating member is pushed in, a predetermined movable contact portion is brought into contact with and separated from the switching fixed contact so that on / off contact switching can be performed.

従来より、このような押釦スイッチとして、ケース内に３つの固定接点と復帰用のコイルばねとを横一列に並べて配設し、コイルばねの真上からケースの上方へ操作部材の押圧部を突出させた構成のものが知られている（例えば、特許文献１参照）。かかる従来例において、操作部材にはケース内で横向きに延びる延出部が設けられており、この延出部に取り付けられた横長の可動接点部材の３箇所に第１〜第３の可動接点部が形成されている。このうち第１の可動接点部はコイルばねの近傍に位置して第３の可動接点部はコイルばねから最も離れて位置し、第２の可動接点部は第１の可動接点部と第３の可動接点部の中間に位置している。また、ケース内には前記３つの固定接点として、第１の可動接点部が常時摺接するコモン固定接点と、押し込み操作時に第２の可動接点部が摺接するＮＯ固定接点と、非操作時に第３の可動接点部が摺接するＮＣ固定接点とが立設されている。これら３つの固定接点はケースの底面に配設されている接続端子群から導出されており、この接続端子群が外部回路と接続される。   Conventionally, as such a pushbutton switch, three fixed contacts and a return coil spring are arranged in a horizontal row in the case, and the pressing portion of the operation member protrudes from directly above the coil spring to the case. The thing of the made structure is known (for example, refer patent document 1). In such a conventional example, the operating member is provided with an extending portion extending laterally in the case, and the first to third movable contact portions are provided at three positions of the horizontally long movable contact member attached to the extending portion. Is formed. Of these, the first movable contact portion is located in the vicinity of the coil spring, the third movable contact portion is located farthest from the coil spring, and the second movable contact portion is the first movable contact portion and the third movable contact portion. It is located in the middle of the movable contact part. Further, in the case, as the three fixed contacts, a common fixed contact in which the first movable contact portion is always in sliding contact, a NO fixed contact in which the second movable contact portion is in sliding contact during the pushing operation, and a third fixed contact in the non-operated state. The NC fixed contact with which the movable contact portion is slidably contacted is erected. These three fixed contacts are derived from a connection terminal group disposed on the bottom surface of the case, and this connection terminal group is connected to an external circuit.

このように概略構成された従来の押釦スイッチでは、操作部材の非操作時には可動接点部材を介してＮＣ固定接点とコモン固定接点とが導通された状態になっているが、アクチュエータ等を介して操作部材の押圧部が押し込み操作されると、ケース内で可動接点部材が操作部材と一体的に下降するため、第３の可動接点部がＮＣ固定接点から離れて、第２の可動接点部がＮＯ固定接点と摺接するようになる。その結果、ＮＣ固定接点とコモン固定接点間の導通が解除されて、ＮＯ固定接点とコモン固定接点とが導通された状態になるため、オフからオンへの接点切換えが行われる。また、かかる押し込み操作時に操作部材の押圧部の真下でコイルばねが圧縮されていくため、押圧部に対する押し込み操作力が除去されると、コイルばねの弾性復帰力によって操作部材が元位置（非操作位置）へ押し上げられる。その結果、第２の可動接点部がＮＯ固定接点から離れて、第３の可動接点部がＮＣ固定接点と摺接する元のオフ状態に自動復帰する。
特開２００６−２５５１５４号公報 In the conventional pushbutton switch schematically configured in this way, when the operation member is not operated, the NC fixed contact and the common fixed contact are electrically connected via the movable contact member. When the pressing portion of the member is pushed in, the movable contact member descends integrally with the operation member in the case, so that the third movable contact portion is separated from the NC fixed contact, and the second movable contact portion is NO. It comes in sliding contact with the fixed contact. As a result, the continuity between the NC fixed contact and the common fixed contact is released, and the NO fixed contact and the common fixed contact are brought into a conductive state, so that the contact switching from OFF to ON is performed. In addition, since the coil spring is compressed immediately below the pressing portion of the operating member during the pressing operation, when the pressing operation force on the pressing portion is removed, the operating member is returned to the original position (non-operating by the elastic return force of the coil spring). To the position). As a result, the second movable contact portion moves away from the NO fixed contact, and automatically returns to the original off state in which the third movable contact portion is in sliding contact with the NC fixed contact.
JP 2006-255154 A

しかしながら、前述した従来の押釦スイッチでは、操作部材の押圧部の真下に位置する復帰用コイルばねの外側にコモン固定接点と切換え固定接点（ＮＯ固定接点およびＮＣ固定接点）とが並設されており、復帰用コイルばねと切換え固定接点とが大きく離反した位置に配置されているため、押圧部の押し込み操作時に操作部材が傾くと、切換え固定接点に対する可動接点部材の接触位置がずれやすかった。すなわち、操作部材は若干のクリアランスを存してケースに往復動可能に支持する必要があり、このクリアランス内のガタ相当分だけ操作部材が押し込み操作時に傾きやすくなるため、操作部材の僅かな傾きによって接点切換えの動作タイミングがずれてオンあるいはオフ精度を低下させるという問題があった。   However, in the above-described conventional pushbutton switch, the common fixed contact and the switching fixed contact (NO fixed contact and NC fixed contact) are arranged in parallel outside the return coil spring located directly below the pressing portion of the operation member. Since the return coil spring and the switching fixed contact are arranged at positions far apart from each other, if the operating member is tilted during the pressing operation of the pressing portion, the contact position of the movable contact member with respect to the switching fixed contact is likely to shift. In other words, the operation member needs to be supported by the case so as to be able to reciprocate with some clearance, and the operation member is easily tilted by the amount corresponding to the backlash within the clearance. There has been a problem that the operation timing of contact switching is deviated and the on / off accuracy is lowered.

本発明は、このような従来技術の実情に鑑みてなされたもので、その目的は、複数の固定接点間の導通状態の切換えの動作タイミングにずれが生じにくい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 such a state of the art, and an object of the present invention is to provide a pushbutton switch in which the operation timing of switching the conduction state between a plurality of fixed contacts is unlikely to occur.

上記の目的を達成するために、本発明は、押し込み操作される押圧部を有する操作部材と、この操作部材を往復動可能に保持するケースと、前記操作部材に保持されて前記ケース内を往復動する可動接点部材と、前記ケース内で前記押圧部の押し込み操作方向へ延長した側に配置され、前記操作部材を非操作位置へ押し戻す復帰用弾性部材と、複数の端子からそれぞれ前記ケース内へ導出された第１固定接点および第２固定接点とを備え、前記可動接点部材が、前記第１固定接点に摺接する第１可動接点部と、前記第２固定接点に摺接する第２可動接点部とを有し、前記押圧部の押し込み操作に伴い、前記第１および第２可動接点部によって前記第１固定接点と前記第２固定接点との導通状態を切換える押釦スイッチにおいて、前記復帰用弾性部材が中空部を有すると共に、前記各固定接点のうちの１つの固定接点を前記中空部内で前記押圧部の押し込み操作方向に沿って起立させ、前記可動接点部材は、前記操作部材に保持され前記復帰用弾性部材の一端部が当接して前記操作部材側に付勢される保持部を有し、この保持部にそれぞれ外側に突出する第１連結部と第２連結部を介して前記第１可動接点部と前記第２可動接点部がそれぞれ連結され、これら第１および第２可動接点部が前記復帰用弾性部材の前記中空部の内と外に分散して配置されるという構成にした。 In order to achieve the above object, the present invention provides an operation member having a pressing portion that is pushed in, a case that holds the operation member so as to be able to reciprocate, and a reciprocating motion within the case that is held by the operation member. A movable contact member that moves, an elastic member for return that pushes the operating member back to a non-operating position, disposed on the side of the case that extends in the pushing operation direction of the pressing portion, and a plurality of terminals, respectively, into the case A first movable contact portion including a first fixed contact and a second fixed contact that are derived, wherein the movable contact member is in sliding contact with the first fixed contact; and a second movable contact portion in sliding contact with the second fixed contact In the pushbutton switch that switches the conduction state between the first fixed contact and the second fixed contact by the first and second movable contact portions in accordance with the pressing operation of the pressing portion, the return bullet With member has a hollow portion, wherein is erected along the pressing operation direction of the pressing portion of one fixed contact within the hollow portion of the fixed contacts, the movable contact member is retained in said operating member said One end of the return elastic member abuts and has a holding portion biased toward the operation member, and the first connecting portion and the second connecting portion projecting outward from the holding portion respectively. It is connected the second movable contact and the movable contact, respectively, first and second movable contact portion thereof has a configuration that Ru is disposed distributed on the inner and outer of said hollow portion of said return elastic member.

このように構成された押釦スイッチは、押圧部の押し込み操作方向に沿って起立する１つの固定接点を復帰用弾性部材の中空部内に配置させているため、中空部の外側に配置させる残余の固定接点を復帰用弾性部材から大きく離反させる必要がない。つまり、可動接点部材を復帰用弾性部材の側方へ大きく延ばす必要がないため、操作部材が押し込み操作時に傾いても固定接点に対する可動接点部の接触位置はずれにくくなり、第１固定接点と第２固定接点間の導通状態の切換え位置精度、いわゆるオンあるいはオフ精度が高まる。なお、中空部を有する復帰用弾性部材としてはコイルばねが好適である。また、復帰用弾性部材によって可動接点部材が操作部材側に付勢されることから、操作部材に対して可動接点部材が傾きにくくなるので、第１および第２可動接点部が傾きにくくなって接点切換え位置精度が高まる。 In the pushbutton switch configured in this way, since one fixed contact that stands up along the pressing operation direction of the pressing portion is arranged in the hollow portion of the return elastic member, the remaining fixing to be arranged outside the hollow portion is fixed. The contact does not need to be greatly separated from the return elastic member. That is, since it is not necessary to extend the movable contact member to the side of the return elastic member, the contact position of the movable contact portion with respect to the fixed contact is not easily displaced even when the operation member is tilted during the pushing operation. The switching position accuracy of the conduction state between the fixed contacts, the so-called on or off accuracy is increased. A coil spring is suitable as the return elastic member having a hollow portion. In addition, since the movable contact member is biased toward the operation member by the return elastic member, the movable contact member is less likely to be inclined with respect to the operation member, so that the first and second movable contact portions are less likely to be inclined. The switching position accuracy is increased.

上記の構成において、第１固定接点を第１可動接点部が常時摺接するコモン固定接点とし、第２固定接点を第２可動接点部が接離可能に摺接する切換え固定接点とし、コモン固定接点を中空部内に配置させると、復帰用弾性部材として金属製のコイルばねを用い、このコイルばねが衝撃等によって中空部内のコモン固定接点と接触したとしても、コモン固定接点と第１可動接点部とは常に導通されているので、電気信号の出力に対する悪影響は出にくくなる。   In the above configuration, the first fixed contact is a common fixed contact that the first movable contact portion is always in sliding contact with, the second fixed contact is a switching fixed contact that is slidably contacted with the second movable contact portion, and the common fixed contact is When arranged in the hollow portion, a metal coil spring is used as the return elastic member, and even if this coil spring comes into contact with the common fixed contact in the hollow portion due to impact or the like, the common fixed contact and the first movable contact portion are Since it is always conducted, adverse effects on the output of electrical signals are less likely to occur.

また、上記の構成において、切換え固定接点が第１の切換え固定接点と第２の切換え固定接点とからなり、これら第１および第２の切換え固定接点どうしを押圧部の押し込み操作方向に沿って離隔した位置に配置させると、例えばＮＯ固定接点とＮＣ固定接点からなる第１および第２の切換え固定接点を共に復帰用弾性部材の近傍に配置させることができるため、接点切換え位置精度としてオンあるいはオフ精度を大幅に高めることができる。   In the above configuration, the switching fixed contact includes the first switching fixed contact and the second switching fixed contact, and the first and second switching fixed contacts are separated from each other along the pushing operation direction of the pressing portion. For example, both the first and second switching fixed contacts composed of NO fixed contacts and NC fixed contacts can be disposed in the vicinity of the return elastic member, so that the contact switching position accuracy is turned on or off. The accuracy can be greatly increased.

また、上記の構成において、前記第１可動接点部と前記第２可動接点部は前記保持部の中央を対称面として対称形状に形成された。 In the above configuration, the first movable contact portion and the second movable contact portion are formed in a symmetrical shape with the center of the holding portion as a symmetry plane .

また、上記の構成において、第１可動接点部が第１固定接点を挟持する形状に形成されていると共に、第２可動接点部が第２固定接点を挟持する形状に形成されていると、各可動接点部と対応する固定接点との接触が安定したものとなるため信頼性が高まる。この場合において、可動接点部材が金属板からなると共に、保持部が板状であり、この保持部に板面どうしを所定間隔を有して相対向させた一対の略Ｕ字状弾性片が連結されており、これら略Ｕ字状弾性片の先端部で互いに近接する向きに湾曲させた部分を、固定接点を挟持する可動接点部となしておけば、略Ｕ字状弾性片によってばねスパンを稼げるため、固定接点との接触がより安定するものとなる。また、この場合において、一対の略Ｕ字状弾性片の開放側を操作部材側として復帰用弾性部材の中空部内に存するようにしておけば、復帰用弾性部材との干渉を回避しつつ中空部内の固定接点を確実に挟持できる可動接点部材が容易に得られる。また、この場合において、ケース内に設けた取付部によって復帰用弾性部材の他端部を保持すると共に、中空部内に存する固定接点を取付部の中央から中空部外に存する固定接点から離れる方向に外した位置から起立させておけば、復帰用弾性部材と中空部内の略Ｕ字状弾性片との間に所要の間隔が確保しやすくなるため、復帰用弾性部材と干渉する虞のない略Ｕ字状弾性片が容易に形成できる。   In the above configuration, when the first movable contact portion is formed in a shape that sandwiches the first fixed contact, and the second movable contact portion is formed in a shape that sandwiches the second fixed contact, Since the contact between the movable contact portion and the corresponding fixed contact becomes stable, the reliability is increased. In this case, the movable contact member is made of a metal plate, the holding portion is plate-shaped, and a pair of substantially U-shaped elastic pieces whose plate surfaces are opposed to each other with a predetermined interval are connected to the holding portion. If the curved portions of the substantially U-shaped elastic pieces in the direction of approaching each other are used as movable contact portions that sandwich the fixed contact, the spring span is provided by the substantially U-shaped elastic pieces. Since it earns, the contact with the fixed contact becomes more stable. Further, in this case, if the open side of the pair of substantially U-shaped elastic pieces is located in the hollow portion of the return elastic member with the operation member side as the operation member side, the inside of the hollow portion is avoided while avoiding interference with the return elastic member. A movable contact member that can securely hold the fixed contact can be easily obtained. In this case, the other end portion of the return elastic member is held by the mounting portion provided in the case, and the fixed contact existing in the hollow portion is separated from the fixed contact existing outside the hollow portion from the center of the mounting portion. If it stands up from the removed position, it becomes easy to secure a required space between the return elastic member and the substantially U-shaped elastic piece in the hollow portion, so that there is no possibility of interference with the return elastic member. A letter-shaped elastic piece can be formed easily.

本発明の押釦スイッチは、押圧部の押し込み操作方向に沿って起立する１つの固定接点をコイルばね等からなる復帰用弾性部材の中空部内に配置させることによって、残余の固定接点を中空部の外側で復帰用弾性部材の近傍に配置させることができるため、操作部材が押し込み操作時に傾いても固定接点に対する可動接点部の接触位置はずれにくくなる。それゆえ、この押釦スイッチは、操作部材が傾いても第１固定接点と第２固定接点間の導通状態の切換えの動作タイミングにずれが生じにくく、切換え位置精度、いわゆるオンあるいはオフ精度を高めることができる。また、復帰用弾性部材によって可動接点部材が操作部材側に付勢されることから、操作部材に対して可動接点部材が傾きにくくなるので、第１および第２可動接点部が傾きにくくなって接点切換え位置精度が高まる。 The push button switch according to the present invention is configured such that one fixed contact standing up in the pressing operation direction of the pressing portion is disposed in the hollow portion of the return elastic member made of a coil spring or the like, thereby causing the remaining fixed contact to be outside the hollow portion. Therefore, even if the operating member is inclined during the pushing operation, the contact position of the movable contact portion with respect to the fixed contact is not easily displaced. Therefore, this pushbutton switch hardly increases the switching position accuracy, so-called on / off accuracy, even when the operation member is tilted, and the operation timing of switching the conduction state between the first fixed contact and the second fixed contact is not easily generated. Can do. In addition, since the movable contact member is biased toward the operation member by the return elastic member, the movable contact member is less likely to be inclined with respect to the operation member, so that the first and second movable contact portions are less likely to be inclined. The switching position accuracy is increased.

発明の実施の形態を図面を参照して説明すると、図１は本発明の実施形態例に係る押釦スイッチの正面図、図２は該押釦スイッチの非操作状態を示す断面図、図３は図２に対応する内部構造の説明図、図４は該押釦スイッチの押し込み操作状態を示す断面図、図５は可動接点部材と切換え固定接点との接触状態を示す図４に対応する要部説明図、図６は該押釦スイッチに用いられる可動接点部材の斜視図である。   FIG. 1 is a front view of a pushbutton switch according to an embodiment of the present invention, FIG. 2 is a cross-sectional view showing a non-operation state of the pushbutton switch, and FIG. 4 is an explanatory diagram of an internal structure corresponding to FIG. 2, FIG. 4 is a sectional view showing a push-in operation state of the pushbutton switch, and FIG. 5 is an explanatory diagram of a main part corresponding to FIG. FIG. 6 is a perspective view of a movable contact member used for the pushbutton switch.

これらの図に示す押釦スイッチは、上ケース１１および下ケース１２を組み合わせてなる箱状のケース１と、押圧軸部２１を有してケース１に上下動可能に保持された操作部材２と、第１および第２可動接点部３ａ，３ｂを有して操作部材２に固着された可動接点部材としての可動接点片３と、ケース１内で押圧軸部２１の下方に配置された復帰用弾性部材としてのコイルばね４と、下ケース１２の底面に垂設された３本の接続端子５ａ〜５ｃと、各接続端子５ａ〜５ｃからケース１内へ導出された第１固定接点としてのコモン固定接点６および第２固定接点としての切換え固定接点（ＮＯ固定接点７およびＮＣ固定接点８）とによって主に構成されている。   The push button switch shown in these drawings includes a box-shaped case 1 formed by combining an upper case 11 and a lower case 12, an operation member 2 having a pressing shaft portion 21 and held in the case 1 so as to be movable up and down. The movable contact piece 3 as the movable contact member having the first and second movable contact portions 3a and 3b and fixed to the operation member 2, and the return elasticity disposed in the case 1 below the pressing shaft portion 21. The coil spring 4 as a member, three connection terminals 5a to 5c suspended from the bottom surface of the lower case 12, and common fixing as a first fixed contact led out from the connection terminals 5a to 5c into the case 1 It is mainly composed of the contact 6 and the switching fixed contact (NO fixed contact 7 and NC fixed contact 8) as the second fixed contact.

上ケース１１の上端部には開口１１ａが形成されており、この開口１１ａから上方へ操作部材２の押圧軸部２１が突出している。また、開口１１ａの周囲にはゴム等の可撓性に富む材料からなる防塵カバー９が固着されている。この防塵カバー９は開口１１ａを覆うように押圧軸部２１に嵌着されて防塵機能を果たしているが、押圧軸部２１の上下動に伴って防塵カバー９は容易に弾性変形するため、操作部材２の動作に悪影響を及ぼすことはない。なお、図４において防塵カバー９は図示省略されている。   An opening 11a is formed in the upper end portion of the upper case 11, and the pressing shaft portion 21 of the operation member 2 projects upward from the opening 11a. A dust-proof cover 9 made of a flexible material such as rubber is fixed around the opening 11a. The dust cover 9 is fitted to the pressing shaft portion 21 so as to cover the opening 11a and performs a dust-proof function. However, the dust-proof cover 9 easily elastically deforms as the pressing shaft portion 21 moves up and down, so that the operation member The operation of 2 is not adversely affected. In FIG. 4, the dustproof cover 9 is not shown.

下ケース１２は、接続端子５ａ〜５ｃおよび固定接点６〜８の母材である導電性金属板を埋設して成形されている。３本の接続端子５ａ〜５ｃは、下ケース１２の一側部に垂設されたコモン端子５ａと、下ケース１２の中央部に垂設された切換え端子５ｂと、下ケース１２の他側部に垂設された切換え端子５ｃとからなる。コモン端子５ａはケース１内へコモン固定接点６を導出させており、一方の切換え端子５ｂはケース１内へＮＯ（ノーマルオープン）固定接点７を導出させており、他方の換え端子５ｃはケース１内へＮＣ（ノーマルクローズ）固定接点８を導出させている。また、下ケース１２の一側部の上面側にはばね取付部１２ａが突設されており、このばね取付部１２ａにコイルばね４の下端部が取り付けられている。   The lower case 12 is formed by embedding a conductive metal plate which is a base material of the connection terminals 5a to 5c and the fixed contacts 6 to 8. The three connection terminals 5 a to 5 c include a common terminal 5 a suspended from one side of the lower case 12, a switching terminal 5 b suspended from the center of the lower case 12, and the other side of the lower case 12. And a switching terminal 5c that is vertically suspended. The common terminal 5a leads the common fixed contact 6 into the case 1, one switching terminal 5b leads the NO (normally open) fixed contact 7 into the case 1, and the other replacement terminal 5c is the case 1. An NC (normally closed) fixed contact 8 is led inward. Further, a spring mounting portion 12a protrudes from the upper surface side of one side portion of the lower case 12, and the lower end portion of the coil spring 4 is attached to the spring mounting portion 12a.

コモン固定接点６はコイルばね４の中空部４ａ内に起立しており、このコモン固定接点６は下ケース１２のばね取付部１２ａの中央を外した位置（オフセット位置）、具体的には中空部４ａ外に存するＮＯ固定接点７やＮＣ固定接点８から離れる方向（図２の右方）に外した位置に立設されている。ＮＯ固定接点７とＮＣ固定接点８は共に中空部４ａの外側でコイルばね４の近傍に配設されており、下ケース１２上に立設されたＮＯ固定接点７の上方に所定間隔を存してＮＣ固定接点８が横臥姿勢で配置されている。そして、図５に示すように、ＮＯ固定接点７とＮＣ固定接点８とは間隙部を含めてそれぞれの表面および裏面が同一面となっている。   The common fixed contact 6 stands up in the hollow portion 4a of the coil spring 4, and the common fixed contact 6 is located at a position (offset position) from which the center of the spring mounting portion 12a of the lower case 12 is removed, specifically, the hollow portion. 4a is erected in a position removed from the NO fixed contact 7 and the NC fixed contact 8 existing outside 4a (the right side in FIG. 2). The NO fixed contact 7 and the NC fixed contact 8 are both disposed outside the hollow portion 4a and in the vicinity of the coil spring 4, and have a predetermined interval above the NO fixed contact 7 standing on the lower case 12. The NC fixed contact 8 is arranged in a lying posture. As shown in FIG. 5, the NO fixed contact 7 and the NC fixed contact 8 have the same surface and back surface including the gap.

操作部材２は、ケース１内で可動接点片３を保持する基部２２と、基部２２上に突設された押圧軸部２１とからなる。基部２２の天井面にはコイルばね４の上端部が後述する可動接点片３の平板部３１に当接し、この基部２２と下方のばね取付部１２ａとの間にコイルばね４が圧縮状態で介在しているため、操作部材２はコイルばね４によって上方へ弾性付勢されている。なお、図２と図４において、基部２２の天井面は、後述する第１可動接点部３ａがコモン固定接点６と接触している状態がわかるように便宜上凹状に切り欠かれている。押圧軸部２１は開口１１ａを貫通してケース１の上方へ突出しており、この押圧軸部２１の先端部が図示せぬアクチュエータによって押し込み操作されるようになっている。   The operation member 2 includes a base portion 22 that holds the movable contact piece 3 in the case 1 and a pressing shaft portion 21 that protrudes from the base portion 22. The upper end portion of the coil spring 4 abuts on a flat plate portion 31 of the movable contact piece 3 described later on the ceiling surface of the base portion 22, and the coil spring 4 is interposed between the base portion 22 and the lower spring mounting portion 12 a in a compressed state. Therefore, the operation member 2 is elastically biased upward by the coil spring 4. 2 and 4, the ceiling surface of the base portion 22 is notched in a concave shape for convenience so that a state in which a first movable contact portion 3a described later is in contact with the common fixed contact 6 can be seen. The pressing shaft portion 21 penetrates through the opening 11a and protrudes upward from the case 1, and the distal end portion of the pressing shaft portion 21 is pushed by an actuator (not shown).

可動接点片３は図６に示すような形状にフォーミングされた導電性金属板である。この可動接点片３の中央部は操作部材２にかしめ等により固着される平板部３１となっているが、可動接点片３の一端部には相対向する一対のＵ字状弾性片３２が形成されており、可動接点片３の他端部にも同様に相対向する一対のＵ字状弾性片３３が形成されている。図６に示すように、前述した平板部３１は一対のＵ字状弾性片３２，３３の相対向する間隔よりもそれぞれ大きく外方へ突出する突出部３１ａを有しており、これら両突出部３１ａを幅方向で挟むように操作部材２の基部２２に設けられた一対の突起（不図示）にて冷間かしめ等を行うことで平板部３１が基部２２に固定される。これにより、可動接点片３が操作部材２に保持されることになる。すなわち、平板部３１が保持部をなしている。そして、平板部３１にコイルばね４の上端部が当接しているため、可動接点片３はコイルばね４の弾発力によって操作部材２側に付勢されている。また、平板部３１は突出部３１ａの延出方向と交差する方向に沿ってそれぞれ外方へ突出する連結部３１ｂを有しており、これら両連結部３１ｂを介して一対のＵ字状弾性片３２，３３がそれぞれ平板部３１に連結されている。つまり、連結部３１ｂから板面どうしが所定間隔を有して相対向するように金属板が折り曲げられて一対のＵ字状弾性片３２，３３が形成されている。また、一対のＵ字状弾性片３２と一対のＵ字状弾性片３３とは平板部３１の中央を対称面（突出部３１ａが設けられている方向の面）として対称形状（面対称）に形成されている。   The movable contact piece 3 is a conductive metal plate formed into a shape as shown in FIG. The central portion of the movable contact piece 3 is a flat plate portion 31 that is fixed to the operation member 2 by caulking or the like, but a pair of U-shaped elastic pieces 32 facing each other is formed at one end portion of the movable contact piece 3. A pair of U-shaped elastic pieces 33 are also formed on the other end of the movable contact piece 3 in the same manner. As shown in FIG. 6, the flat plate portion 31 described above has a protruding portion 31 a that protrudes outward larger than the interval between the pair of U-shaped elastic pieces 32, 33. The flat plate portion 31 is fixed to the base portion 22 by performing cold caulking or the like with a pair of protrusions (not shown) provided on the base portion 22 of the operation member 2 so as to sandwich the 31a in the width direction. Thereby, the movable contact piece 3 is held by the operation member 2. That is, the flat plate portion 31 forms a holding portion. Since the upper end portion of the coil spring 4 is in contact with the flat plate portion 31, the movable contact piece 3 is biased toward the operation member 2 by the elastic force of the coil spring 4. Moreover, the flat plate part 31 has the connection part 31b which protrudes each outward along the direction which cross | intersects the extension direction of the protrusion part 31a, and a pair of U-shaped elastic piece via these both connection parts 31b 32 and 33 are connected to the flat plate part 31, respectively. That is, a pair of U-shaped elastic pieces 32 and 33 are formed by bending the metal plate so that the plate surfaces face each other with a predetermined distance from the connecting portion 31b. In addition, the pair of U-shaped elastic pieces 32 and the pair of U-shaped elastic pieces 33 have a symmetrical shape (plane symmetry) with the center of the flat plate portion 31 as a symmetrical surface (a surface in the direction in which the protruding portion 31a is provided). Is formed.

ここで、対称形状の一対のＵ字状弾性片３２，３３について、図２〜図４に示す可動接点片３が組付けられた状態を基に詳述する。なお、対称形状のため一方の一対のＵ字状弾性片３２についてのみ説明する。このＵ字状弾性片３２は、連結部３１ｂから下ケース１２の内底面側（図６では下方）に向かって所定距離延びる第１延出部３２ａと、この第１延出部３２ａの下ケース１２の内底面側端部からコモン固定接点６と相対向する位置まで外方（図６では右斜め下方）に延びる第２延出部３２ｂと、この第２延出部３２ｂのコモン固定接点６側端部から第１延出部３２ａとほぼ平行にコモン固定接点６に沿うよう（図６では上方）に連結部３１ｂとほぼ同一位置まで延びる第３延出部３２ｃとからなり、この第３延出部３２ｃは図５に示すようにコモン固定接点６側に傾斜している。そして、一対のＵ字状弾性片３２は第３延出部３２ｃの先端部どうしが互いに近接する向きに湾曲させてあり、この湾曲部分がコモン固定接点６に常時摺接する第１可動接点部３ａとなっている。同様に、一対のＵ字状弾性片３３も第３延出部の先端部どうしが互いに近接する向きに湾曲させてあり、この湾曲部分が切換え固定接点（ＮＯ固定接点７およびＮＣ固定接点８）に接離可能に摺接する第２可動接点部３ｂとなっている。   Here, the pair of symmetrical U-shaped elastic pieces 32 and 33 will be described in detail based on the state in which the movable contact piece 3 shown in FIGS. Note that only one pair of U-shaped elastic pieces 32 will be described because of the symmetrical shape. The U-shaped elastic piece 32 includes a first extending portion 32a extending a predetermined distance from the connecting portion 31b toward the inner bottom surface side (downward in FIG. 6) of the lower case 12, and a lower case of the first extending portion 32a. 12, a second extending portion 32b extending outward (slightly downward in FIG. 6) from the end on the inner bottom surface side to a position opposite to the common fixed contact 6, and the common fixed contact 6 of the second extending portion 32b The third extending portion 32c extends from the side end portion to substantially the same position as the connecting portion 31b so as to extend along the common fixed contact 6 (upward in FIG. 6) substantially parallel to the first extending portion 32a. The extending portion 32c is inclined toward the common fixed contact 6 as shown in FIG. The pair of U-shaped elastic pieces 32 are curved so that the end portions of the third extending portion 32 c are close to each other, and the curved portions are always in sliding contact with the common fixed contact 6. It has become. Similarly, the pair of U-shaped elastic pieces 33 are also curved so that the tips of the third extending portions are close to each other, and these curved portions are switching fixed contacts (NO fixed contact 7 and NC fixed contact 8). The second movable contact portion 3b is slidably contacted with the first movable contact portion 3b.

図２〜図４に示すように、可動接点片３の第１可動接点部３ａおよび第２可動接点部３ｂはコイルばね４の中空部４ａの内と外に分散して配置されている。つまり、可動接点片３の一端側で対をなすＵ字状弾性片３２は第２延出部３２ｂを下ケース１２の内底面側とし、第１延出部３２ａと第３延出部３２ｃ間の開放部（開口部）を操作部材２側としてコイルばね４の中空部４ａ内に挿入されており、この中空部４ａ内に起立しているコモン固定接点６を第１可動接点部３ａが挟持している。前述したようにコモン固定接点６がばね取付部１２ａの中央からオフセットさせてあるため、このコモン固定接点６に第１可動接点部３ａを摺接させるべくＵ字状弾性片３２を中空部４ａ内に配置させても、Ｕ字状弾性片３２とコイルばね４との間には十分な間隔が確保されている。このとき、コモン固定接点６のＵ字状弾性片３２が配置されていない側はコイルばね４に近付くことになるため、衝撃等によってコイルばね４がコモン固定接点６と接触する可能性がある。この場合、導電性金属材からなるコイルばね４がコモン固定接点６と接触したとしても、コモン固定接点６と第２可動接点部３ｂとは常に導通されているので、電気信号の出力に対する悪影響は出にくい。そして、可動接点片３の他端側で対をなすＵ字状弾性片３３の第２可動接点部３ｂは、操作部材２の非操作時には図２に示すようにＮＣ固定接点８を挟持しているが、操作部材２が所定ストローク押し込み操作されると、図４に示すように第２可動接点部３ｂはＮＣ固定接点８から離れてＮＯ固定接点７を挟持するようになっている。   As shown in FIGS. 2 to 4, the first movable contact portion 3 a and the second movable contact portion 3 b of the movable contact piece 3 are distributed and arranged inside and outside the hollow portion 4 a of the coil spring 4. That is, the U-shaped elastic piece 32 paired on one end side of the movable contact piece 3 has the second extending portion 32b as the inner bottom surface side of the lower case 12, and between the first extending portion 32a and the third extending portion 32c. The open portion (opening portion) of the coil spring 4 is inserted into the hollow portion 4a of the coil spring 4 with the operating member 2 side, and the first movable contact portion 3a holds the common fixed contact 6 standing in the hollow portion 4a. is doing. Since the common fixed contact 6 is offset from the center of the spring mounting portion 12a as described above, the U-shaped elastic piece 32 is placed in the hollow portion 4a so that the first movable contact portion 3a is slidably contacted with the common fixed contact 6. Even if it arrange | positions, sufficient space | interval is ensured between the U-shaped elastic piece 32 and the coil spring 4. FIG. At this time, the side on which the U-shaped elastic piece 32 of the common fixed contact 6 is not disposed approaches the coil spring 4, so that the coil spring 4 may come into contact with the common fixed contact 6 due to an impact or the like. In this case, even if the coil spring 4 made of a conductive metal material comes into contact with the common fixed contact 6, the common fixed contact 6 and the second movable contact portion 3 b are always in conduction, so there is an adverse effect on the output of the electric signal. Hard to come out. The second movable contact portion 3b of the U-shaped elastic piece 33 that forms a pair on the other end side of the movable contact piece 3 holds the NC fixed contact 8 as shown in FIG. 2 when the operation member 2 is not operated. However, when the operation member 2 is pushed by a predetermined stroke, the second movable contact portion 3b is separated from the NC fixed contact 8 and holds the NO fixed contact 7 as shown in FIG.

このように構成された押釦スイッチは、非操作時には操作部材２がコイルばね４の付勢力で最上位置まで押し上げられているため、図２に示すように、第１可動接点部３ａがコモン固定接点６に摺接して第２可動接点部３ｂがＮＣ固定接点８に摺接した状態、つまり可動接点片３を介してＮＣ固定接点８とコモン固定接点６とが導通された状態になっている。ただし、この状態で第２可動接点部３ｂはＮＯ固定接点７とは接触していないため、ＮＯ固定接点７とコモン固定接点６間の導通は遮断されており、それゆえ押釦スイッチはオフ状態となっている。   In the pushbutton switch configured in this manner, the operation member 2 is pushed up to the uppermost position by the urging force of the coil spring 4 when not operated, so that the first movable contact portion 3a is a common fixed contact as shown in FIG. 6, the second movable contact portion 3b is in sliding contact with the NC fixed contact 8, that is, the NC fixed contact 8 and the common fixed contact 6 are electrically connected via the movable contact piece 3. However, since the second movable contact portion 3b is not in contact with the NO fixed contact 7 in this state, the conduction between the NO fixed contact 7 and the common fixed contact 6 is interrupted, and therefore the pushbutton switch is in the OFF state. It has become.

図２に示す押圧軸部２１が図示せぬアクチュエータによって押し込み操作されると、ケース１内でコイルばね４が圧縮されて可動接点片３が操作部材２と一体的に下降するため、第１可動接点部３ａはコモン固定接点６に対し挟持姿勢のまま摺動していく。また、図４と図５に示すように、第２可動接点部３ｂはＮＣ固定接点８から離れてＮＯ固定接点７を挟持するようになる。その結果、ＮＣ固定接点８とコモン固定接点６間の導通が解除されて、ＮＯ固定接点７とコモン固定接点６とが導通された状態になるため、オフからオンへの接点切換えが行われる。そして、この後、押圧軸部２１に対する押し込み操作力が除去されると、コイルばね４の弾性復帰力によって操作部材２が押し上げられるため、第２可動接点部３ｂがＮＯ固定接点７から離れてＮＣ固定接点８と摺接する元のオフ状態に自動復帰する。このように、操作部材２の移動に伴って第２可動接点部３ｂがＮＯ固定接点７とＮＣ固定接点８との間を摺動してオン・オフ状態の接点切換えが行われる際に、本実施形態例では、図５に示すようにＮＯ固定接点７とＮＣ固定接点８とは間隙部を含めてそれぞれの表面および裏面が同一面となっているので、接点圧を一定に保った状態で円滑に摺動させることができ、優れた接点切換え位置精度を確保できる。   When the pressing shaft portion 21 shown in FIG. 2 is pushed by an actuator (not shown), the coil spring 4 is compressed in the case 1 and the movable contact piece 3 is lowered integrally with the operation member 2. The contact portion 3a slides with respect to the common fixed contact 6 while being held. As shown in FIGS. 4 and 5, the second movable contact portion 3 b is separated from the NC fixed contact 8 and sandwiches the NO fixed contact 7. As a result, the continuity between the NC fixed contact 8 and the common fixed contact 6 is released, and the NO fixed contact 7 and the common fixed contact 6 are brought into a conductive state, so that the contact is switched from OFF to ON. After that, when the pushing operation force with respect to the pressing shaft portion 21 is removed, the operation member 2 is pushed up by the elastic return force of the coil spring 4, so that the second movable contact portion 3b is separated from the NO fixed contact 7 and NC. It automatically returns to the original OFF state in sliding contact with the fixed contact 8. As described above, when the second movable contact portion 3b slides between the NO fixed contact 7 and the NC fixed contact 8 in accordance with the movement of the operation member 2, the on / off state contact switching is performed. In the embodiment, as shown in FIG. 5, the NO fixed contact 7 and the NC fixed contact 8 have the same front and back surfaces, including the gap, so that the contact pressure is kept constant. It can be smoothly slid and excellent contact switching position accuracy can be secured.

また、可動接点片３の平板部３１に対して第１可動接点部３ａを有する一対のＵ字状弾性片３２と第２可動接点部３ｂを有する一対のＵ字状弾性片３３とがコイルばね４の中空部４ａの内と外に分散して配置されており、平板部３１にコイルばね４の上端部が当接されて操作部材２側に付勢されていることから、可動接点片３が操作部材２に対して傾きにくくなるので、第１可動接点部３ａおよび第２可動接点部３ｂが傾きにくくなり、接点切換え位置精度が高まる。本実施形態例では、操作部材２の天井面と可動接点片３の平板部３１とが平面どうしで対向していることから、可動接点片３が操作部材２に対してより傾きにくくなるので、接点切換え位置精度がより一層高まる。なお、本実施形態例では、平板部３１にコイルばね４の上端部を直に接触させて可動接点片３を操作部材２側に付勢させているが、平板部３１とコイルばね４の上端部との間に図示せぬスペーサ等を介在させて可動接点片３を操作部材２側に付勢させてもよい。また、可動接点片３の（平板部３１の）保持位置を押圧軸部２１の真下でなく、ＮＯ固定接点７およびＮＣ固定接点８側にずらしていることから、押圧軸部２１をケース１のコモン固定接点６側端部（図１，２，４ではケース１の右側端部）に配設することができる。   A pair of U-shaped elastic pieces 32 having a first movable contact portion 3a and a pair of U-shaped elastic pieces 33 having a second movable contact portion 3b with respect to the flat plate portion 31 of the movable contact piece 3 are coil springs. Since the upper end portion of the coil spring 4 is brought into contact with the flat plate portion 31 and is urged toward the operation member 2 side, the movable contact piece 3 is arranged. Is less inclined with respect to the operating member 2, the first movable contact portion 3 a and the second movable contact portion 3 b are less likely to be inclined, and the contact switching position accuracy is increased. In the present embodiment, since the ceiling surface of the operation member 2 and the flat plate portion 31 of the movable contact piece 3 are opposed to each other between the planes, the movable contact piece 3 is less inclined with respect to the operation member 2. Contact switching position accuracy is further increased. In this embodiment, the upper end of the coil spring 4 is brought into direct contact with the flat plate portion 31 to bias the movable contact piece 3 toward the operation member 2 side. The movable contact piece 3 may be urged toward the operation member 2 by interposing a spacer (not shown) between them. In addition, since the holding position of the movable contact piece 3 (of the flat plate portion 31) is shifted to the NO fixed contact 7 side and the NC fixed contact 8 side, not directly below the pressing shaft portion 21, the pressing shaft portion 21 is moved to the case 1 side. It can be arranged at the common fixed contact 6 side end (the right end of the case 1 in FIGS. 1, 2 and 4).

以上説明したように、本実施形態例に係る押釦スイッチは、押圧軸部２１の押し込み操作方向に沿って起立するコモン固定接点６をコイルばね４の中空部４ａ内に配置させているため、中空部４ａの外側にはコイルばね４の近傍に切換え固定接点（ＮＯ固定接点７およびＮＣ固定接点８）を配置させることができる。つまり、可動接点片３をコイルばね４の側方へ大きく延ばす必要がないため、操作部材２が押し込み操作時に傾いても、切換え固定接点７，８に対する第２可動接点部３ｂの接触位置はほとんどずれなくなる。それゆえ、この押釦スイッチは、操作部材２が傾いても接点切換えの動作タイミングにずれが生じにくく、切換え位置精度、いわゆるオンあるいはオフ精度が高まっている。また、操作部材２や可動接点片３を小型化できるため、押釦スイッチを小型化する場合にも容易に対応できる。   As described above, in the pushbutton switch according to the present embodiment, the common fixed contact 6 that rises along the pressing operation direction of the pressing shaft portion 21 is disposed in the hollow portion 4 a of the coil spring 4. A switching fixed contact (NO fixed contact 7 and NC fixed contact 8) can be arranged near the coil spring 4 outside the portion 4a. That is, since it is not necessary to extend the movable contact piece 3 to the side of the coil spring 4, the contact position of the second movable contact portion 3b with respect to the switching fixed contacts 7 and 8 is almost the same even when the operation member 2 is tilted during the pushing operation. It will not slip. For this reason, the push button switch is less likely to be shifted in the contact switching operation timing even when the operation member 2 is tilted, and the switching position accuracy, so-called on or off accuracy is increased. Further, since the operation member 2 and the movable contact piece 3 can be reduced in size, it is possible to easily cope with the case where the push button switch is reduced in size.

また、本実施形態例に係る押釦スイッチでは、可動接点片３の各可動接点部３ａ，３ｂがＵ字状弾性片３２，３３の先端部に形成されてコモン固定接点６や切換え固定接点７，８を挟持できるようにしてあるため、各可動接点部３ａ，３ｂと対応する固定接点６〜８との接触が安定したものとなり、信頼性が高まっている。すなわち、Ｕ字状弾性片３２，３３を設けることによって可動接点片３を大型化しなくても十分なばねスパンが稼げるため、各可動接点部３ａ，３ｂを対応する固定接点６〜８に確実に弾接させることができる。しかも、第１可動接点部３ａが摺接するコモン固定接点６をばね取付部１２ａの中央を外した位置から起立させることによって、コイルばね４と中空部４ａ内のＵ字状弾性片３２との間に十分な間隔を確保しているため、これらＵ字状弾性片３２とコイルばね４との干渉も確実に回避されている。なお、上記実施形態例では、Ｕ字状弾性片３２の開放側を操作部材２側としてコイルばね４の中空部４ａ内に位置しているが、これに限定されるものではなく、例えばＵ字状弾性片３２の開放側をコイルばね４側とし、Ｕ字状弾性片３２が押圧軸部２１側の中空部４ａ外に位置する構成としてもよい。   Further, in the pushbutton switch according to the present embodiment example, the movable contact portions 3a and 3b of the movable contact piece 3 are formed at the distal ends of the U-shaped elastic pieces 32 and 33 so that the common fixed contact 6 and the switching fixed contact 7 and 8 can be clamped, the contact between the movable contact portions 3a and 3b and the corresponding fixed contacts 6 to 8 becomes stable, and the reliability is increased. That is, by providing the U-shaped elastic pieces 32 and 33, a sufficient spring span can be obtained without increasing the size of the movable contact piece 3, so that the movable contact portions 3a and 3b can be securely attached to the corresponding fixed contacts 6 to 8. It can be made elastic. Moreover, by raising the common fixed contact 6 slidably contacting the first movable contact portion 3a from the position where the center of the spring mounting portion 12a is removed, the coil spring 4 and the U-shaped elastic piece 32 in the hollow portion 4a are positioned. Therefore, the interference between the U-shaped elastic piece 32 and the coil spring 4 is reliably avoided. In the above embodiment, the open side of the U-shaped elastic piece 32 is located in the hollow portion 4a of the coil spring 4 with the operating member 2 side, but the present invention is not limited to this. The open side of the elastic piece 32 may be the coil spring 4 side, and the U-shaped elastic piece 32 may be positioned outside the hollow part 4a on the pressing shaft 21 side.

なお、上記実施形態例では、第２固定接点である切換え固定接点としてケース内にＮＯ固定接点とＮＣ固定接点を配設しているが、ＮＯ固定接点とＮＣ固定接点のいずれか一方のみからなる切換え固定接点であってもよい。また、コイルばね等の復帰用弾性部材の中空部内に切換え固定接点を配置して、中空部の外側に第１固定接点としてのコモン固定接点を配置させるという構成にしてもよい。また、第１固定接点をコモン固定接点とせず、第２固定接点を切換え固定接点とせずに、例えば第１固定接点および第２固定接点をそれぞれ上端部（操作部材側）に樹脂等の絶縁部を設けた固定接点の構造としてもよい。このように構成したものでは、非操作時には第１可動接点部および第２可動接点部がそれぞれ前記絶縁部に摺接していてオフ状態となっており、操作部材の押圧部が押し込み操作されると、第１可動接点部が第１固定接点に摺接すると共に第２可動接点部が第２固定接点に摺接することにより、第１固定接点と第２固定接点とが導通してオン状態となる。このように構成したものも、押圧部の押し込み操作に伴い、第１可動接点部および第２可動接点部によって第１固定接点と第２固定接点との導通状態を切換えることができる。また、前記絶縁部を固定接点の下端部に設けて押圧部の押し込み操作によってオン状態からオフ状態に切換える構成にしてもよい。さらに、可動接点部材の形状も適宜選択可能であり、例えば可動接点部材に設けた相対向する一対のＬ字状弾性片の先端部に可動接点部を形成してもよい。   In the above-described embodiment, the NO fixed contact and the NC fixed contact are arranged in the case as the switching fixed contact that is the second fixed contact, but it is composed of only one of the NO fixed contact and the NC fixed contact. It may be a switching fixed contact. Further, the switching fixed contact may be disposed in the hollow portion of the return elastic member such as a coil spring, and the common fixed contact as the first fixed contact may be disposed outside the hollow portion. Also, the first fixed contact is not a common fixed contact, and the second fixed contact is not a switching fixed contact. For example, the first fixed contact and the second fixed contact are respectively insulated at the upper end (operation member side) such as resin. It is good also as a structure of the fixed contact which provided. In such a configuration, when the first movable contact portion and the second movable contact portion are in slidable contact with the insulating portion in the non-operation state and are in the off state, the pressing portion of the operation member is pushed in. When the first movable contact portion is in sliding contact with the first fixed contact and the second movable contact portion is in sliding contact with the second fixed contact, the first fixed contact and the second fixed contact are conducted and turned on. Also in this configuration, the conduction state between the first fixed contact and the second fixed contact can be switched by the first movable contact portion and the second movable contact portion in accordance with the pressing operation of the pressing portion. Further, the insulating portion may be provided at the lower end portion of the fixed contact and switched from the on state to the off state by a pressing operation of the pressing portion. Furthermore, the shape of the movable contact member can also be selected as appropriate. For example, the movable contact portion may be formed at the distal ends of a pair of opposing L-shaped elastic pieces provided on the movable contact member.

本発明の実施形態例に係る押釦スイッチの正面図である。It is a front view of the pushbutton switch which concerns on the example of embodiment of this invention. 該押釦スイッチの非操作状態を示す断面図である。It is sectional drawing which shows the non-operation state of this pushbutton switch. 図２に対応する内部構造の説明図である。It is explanatory drawing of the internal structure corresponding to FIG. 該押釦スイッチの押し込み操作状態を示す断面図である。It is sectional drawing which shows the pushing operation state of this pushbutton switch. 可動接点部材と切換え固定接点との接触状態を示す図４に対応する要部説明図である。It is principal part explanatory drawing corresponding to FIG. 4 which shows the contact state of a movable contact member and a switching fixed contact. 該押釦スイッチに用いられる可動接点部材の斜視図である。It is a perspective view of the movable contact member used for this pushbutton switch.

符号の説明Explanation of symbols

１ ケース
２ 操作部材
３ 可動接点片（可動接点部材）
３ａ 第１可動接点部
３ｂ 第２可動接点部
３１ 平板部（保持部）
４ コイルばね（復帰用弾性部材）
４ａ 中空部
５ａ コモン端子
５ｂ，５ｃ 切換え端子
６ コモン固定接点（第１固定接点）
７ ＮＯ固定接点（切換え固定接点：第２固定接点）
８ ＮＣ固定接点（切換え固定接点：第２固定接点）
１１ 上ケース
１２ 下ケース
１２ａ ばね取付部（取付部）
２１ 押圧軸部（押圧部）
３２，３３ Ｕ字状弾性片 DESCRIPTION OF SYMBOLS 1 Case 2 Operation member 3 Movable contact piece (movable contact member)
3a 1st movable contact part 3b 2nd movable contact part 31 Flat plate part (holding part)
4 Coil spring (return elastic member)
4a Hollow portion 5a Common terminal 5b, 5c Switching terminal 6 Common fixed contact (first fixed contact)
7 NO fixed contact (switching fixed contact: second fixed contact)
8 NC fixed contact (switching fixed contact: 2nd fixed contact)
11 Upper case 12 Lower case 12a Spring mounting part (Mounting part)
21 Pressing shaft (pressing part)
32, 33 U-shaped elastic piece

Claims (9)

押し込み操作される押圧部を有する操作部材と、この操作部材を往復動可能に保持するケースと、前記操作部材に保持されて前記ケース内を往復動する可動接点部材と、前記ケース内で前記押圧部の押し込み操作方向へ延長した側に配置され、前記操作部材を非操作位置へ押し戻す復帰用弾性部材と、複数の端子からそれぞれ前記ケース内へ導出された第１固定接点および第２固定接点とを備え、前記可動接点部材が、前記第１固定接点に摺接する第１可動接点部と、前記第２固定接点に摺接する第２可動接点部とを有し、前記押圧部の押し込み操作に伴い、前記第１および第２可動接点部によって前記第１固定接点と前記第２固定接点との導通状態を切換える押釦スイッチであって、
前記復帰用弾性部材が中空部を有すると共に、前記各固定接点のうちの１つの固定接点を前記中空部内で前記押圧部の押し込み操作方向に沿って起立させ、
前記可動接点部材は、前記操作部材に保持され前記復帰用弾性部材の一端部が当接して前記操作部材側に付勢される保持部を有し、この保持部にそれぞれ外側に突出する第１連結部と第２連結部を介して前記第１可動接点部と前記第２可動接点部がそれぞれ連結され、これら第１および第２可動接点部が前記復帰用弾性部材の前記中空部の内と外に分散して配置されることを特徴とする押釦スイッチ。 An operating member having a pressing portion that is pushed in, a case that holds the operating member so as to be reciprocally movable, a movable contact member that is held by the operating member and reciprocates within the case, and the press within the case A return elastic member that pushes the operation member back to a non-operation position, and a first fixed contact and a second fixed contact that are led out from the plurality of terminals into the case, respectively. And the movable contact member has a first movable contact portion that is in sliding contact with the first fixed contact, and a second movable contact portion that is in sliding contact with the second fixed contact, and is accompanied by a pressing operation of the pressing portion. A push button switch for switching a conduction state between the first fixed contact and the second fixed contact by the first and second movable contact portions,
The return elastic member has a hollow portion, and one fixed contact of the fixed contacts is erected along the pushing operation direction of the pressing portion in the hollow portion ,
The movable contact member has a holding portion that is held by the operation member and is urged toward the operation member by abutting one end of the return elastic member, and each of the movable contact members protrudes outward from the holding portion. The first movable contact portion and the second movable contact portion are respectively connected via a connecting portion and a second connection portion, and the first and second movable contact portions are connected to the inside of the hollow portion of the return elastic member. A pushbutton switch, characterized in that it is distributed outside . 請求項１の記載において、前記復帰用弾性部材がコイルばねであることを特徴とする押釦スイッチ。   2. The pushbutton switch according to claim 1, wherein the return elastic member is a coil spring. 請求項１または２の記載において、前記第１固定接点を前記第１可動接点部が常時摺接するコモン固定接点とし、前記第２固定接点を前記第２可動接点部が接離可能に摺接する切換え固定接点とし、前記コモン固定接点を前記中空部内に配置させたことを特徴とする押釦スイッチ。   3. The switching according to claim 1 or 2, wherein the first fixed contact is a common fixed contact that the first movable contact portion is always in sliding contact with, and the second fixed contact is slidably contacted with the second movable contact portion. A pushbutton switch, characterized in that it is a fixed contact, and the common fixed contact is disposed in the hollow portion. 請求項３の記載において、前記切換え固定接点が第１の切換え固定接点と第２の切換え固定接点とからなり、これら第１および第２の切換え固定接点どうしを前記押圧部の押し込み操作方向に沿って離隔した位置に配置させたことを特徴とする押釦スイッチ。   4. The switching fixed contact according to claim 3, wherein the switching fixed contact includes a first switching fixed contact and a second switching fixed contact, and the first and second switching fixed contacts are arranged along the pushing operation direction of the pressing portion. A push button switch characterized by being arranged at a position separated from each other. 請求項１の記載において、前記第１可動接点部と前記第２可動接点部は前記保持部の中央を対称面として対称形状に形成されたことを特徴とする押釦スイッチ。 2. The pushbutton switch according to claim 1 , wherein the first movable contact portion and the second movable contact portion are formed in a symmetrical shape with the center of the holding portion as a symmetry plane . 請求項１〜５の記載において、前記第１可動接点部が前記第１固定接点を挟持する形状に形成されていると共に、前記第２可動接点部が前記第２固定接点を挟持する形状に形成されていることを特徴とする押釦スイッチ。 In the description of the claims 1-5, together with the first movable contact portion is formed in a shape sandwiching the first fixed contact, formed in a shape the second movable contact portion is held between the second fixed contact A push button switch characterized by being made. 請求項１〜６の記載において、前記可動接点部材が金属板からなると共に、前記保持部が板状であり、この保持部に板面どうしを所定間隔を有して相対向させた一対の略Ｕ字状弾性片が連結されており、これら略Ｕ字状弾性片の先端部で互いに近接する向きに湾曲させた部分を、前記固定接点を挟持する前記可動接点部となしたことを特徴とする押釦スイッチ。 In the description of the claims 1-6, together with the movable contact member is made of a metal plate, wherein the holding portion is a plate-shaped, a pair of substantially where the plate surfaces to each other is opposed with a predetermined distance to the holding portion A U-shaped elastic piece is connected, and a portion of the substantially U-shaped elastic piece curved in a direction approaching each other is used as the movable contact portion for holding the fixed contact. Push button switch to do. 請求項７の記載において、一対の前記略Ｕ字状弾性片の開放側を前記操作部材側として前記復帰用弾性部材の前記中空部内に存することを特徴とする押釦スイッチ。   8. The pushbutton switch according to claim 7, wherein the open side of the pair of substantially U-shaped elastic pieces is located in the hollow portion of the return elastic member with the operation member side being the open side. 請求項８の記載において、前記ケース内に設けた取付部によって前記復帰用弾性部材の他端部を保持すると共に、前記中空部内に存する前記固定接点を前記取付部の中央から前記中空部外に存する前記固定接点から離れる方向に外した位置から起立させたことを特徴とする押釦スイッチ。   In Claim 8, While the other end part of the said elastic member for a return | restoration is hold | maintained by the attaching part provided in the said case, the said fixed contact which exists in the said hollow part is made outside the said hollow part from the center of the said attaching part. A pushbutton switch, wherein the pushbutton switch is erected from a position removed in a direction away from the existing fixed contact.
JP2008145766A 2008-06-03 2008-06-03 Push button switch Active JP5119051B2 (en)

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JP2008145766A JP5119051B2 (en) 2008-06-03 2008-06-03 Push button switch
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KR1020090048081A KR101059402B1 (en) 2008-06-03 2009-06-01 Push switch
DE102009023575A DE102009023575B4 (en) 2008-06-03 2009-06-02 push switch

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