JP6949222B2 - Push switch - Google Patents

Push switch Download PDF

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Publication number
JP6949222B2
JP6949222B2 JP2020525241A JP2020525241A JP6949222B2 JP 6949222 B2 JP6949222 B2 JP 6949222B2 JP 2020525241 A JP2020525241 A JP 2020525241A JP 2020525241 A JP2020525241 A JP 2020525241A JP 6949222 B2 JP6949222 B2 JP 6949222B2
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contact
dome
push switch
dome portion
fixed contact
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JPWO2019244400A1 (en
Inventor
卓哉 小笠原
卓哉 小笠原
伊鶴 貞松
伊鶴 貞松
克敏 舂井
克敏 舂井
竜太 竹内
竜太 竹内
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Alps Alpine Co Ltd
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Alps Electric Co Ltd
Alps Alpine Co Ltd
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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
    • H01H13/50—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member
    • H01H13/52—Switches having rectilinearly-movable operating part or parts adapted for pushing or pulling in one direction only, e.g. push-button switch having a single operating member the contact returning to its original state immediately upon removal of operating force, e.g. bell-push switch

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  • Push-Button Switches (AREA)

Description

本発明は、プッシュスイッチに関する。 The present invention relates to a push switch.

電気機器に用いられるスイッチ装置として、固定接点部材と、当該固定接点部材と離接可能な可動接点部材と、を備えたプッシュスイッチが利用されている。可動接点部材は、ドーム状に膨出したドーム部を有し、固定接点部材から離間して配置される。また、ドーム部上には、ユーザが押圧操作する押圧部材（押し子部材）が設けられる。ユーザが押圧部材を押圧操作すると、ドーム部が反転して固定接点部材と接触し、可動接点部材と固定接点部材とが導通する。また、ドーム部の反転により、操作感触が発生する。従来、このようなプッシュスイッチとして、ドーム部の頂部にオーバーストローク用の接片部（タブ）を設けたものが提案されている。 As a switch device used in an electric device, a push switch including a fixed contact member and a movable contact member that can be separated from and detached from the fixed contact member is used. The movable contact member has a dome portion that bulges like a dome, and is arranged apart from the fixed contact member. Further, a pressing member (pushing member) that the user presses is provided on the dome portion. When the user presses the pressing member, the dome portion is inverted and comes into contact with the fixed contact member, and the movable contact member and the fixed contact member are electrically connected. In addition, the inversion of the dome portion causes a feeling of operation. Conventionally, as such a push switch, one in which a contact portion (tab) for overstroke is provided on the top of the dome portion has been proposed.

特開２０１７−７６６１５号公報JP-A-2017-76615

しかしながら、上記従来のプッシュスイッチでは、ユーザが押圧部材を押圧操作すると、押圧部材によって接片部の根元に荷重が加わる。そのため、従来の構造のまま、プッシュスイッチの動作寿命をより長寿命化しようとすると、接片部にクラックが生じ、長寿命化の要求に対応できないおそれがあった。 However, in the conventional push switch, when the user presses the pressing member, the pressing member applies a load to the base of the contact portion. Therefore, if an attempt is made to extend the operating life of the push switch while maintaining the conventional structure, cracks may occur in the contact portion, and the demand for extending the life may not be met.

本発明は、上述した課題を解決するものであり、動作寿命が長いプッシュスイッチを提供することを目的とする。 The present invention solves the above-mentioned problems, and an object of the present invention is to provide a push switch having a long operating life.

一実施形態に係るプッシュスイッチは、収容部を備えたハウジングと、前記収容部の収容底面に露出する第１固定接点部と、ドーム状に膨出したドーム部を有し、前記収容部に配置され、前記ドーム部の反転動作によって前記第１固定接点部と接離可能な可動接点部材と、前記ドーム部上に配置された押圧部材と、を備え、前記ドーム部は、前記押圧部材との接触領域の外側に根元が配置され、前記接触領域の内側に先端部が配置され、前記根元から前記ドーム部の内側に向かって屈曲された接片部を有し、前記ドーム部は、頂部が非開口である。
The push switch according to one embodiment has a housing provided with an accommodating portion, a first fixed contact portion exposed on the accommodating bottom surface of the accommodating portion, and a dome portion bulging in a dome shape, and is arranged in the accommodating portion. A movable contact member that can be brought into contact with and detached from the first fixed contact portion by the reversing operation of the dome portion, and a pressing member arranged on the dome portion are provided, and the dome portion has the pressing member. root is located outside of the contact region, the tip portion on the inner side of the contact region is located, have a contact piece portion which is bent toward the inside of the dome portion from said root, said dome portion is a top portion It is non-opening .

プッシュスイッチを斜め上方から見た分解斜視図。An exploded perspective view of the push switch viewed from diagonally above. プッシュスイッチを斜め下方から見た分解斜視図。An exploded perspective view of the push switch viewed from diagonally below. プッシュスイッチを示す斜視図。The perspective view which shows the push switch. プッシュスイッチを示す平面図。Top view showing a push switch. 可動接点部材を示す平面図。The plan view which shows the movable contact member. 可動接点部材を示す側面図。The side view which shows the movable contact member. 可動接点部材を示す底面図。Bottom view showing a movable contact member. 図６のＶＩＩＩ−ＶＩＩＩ線で切断した断面図。FIG. 6 is a cross-sectional view taken along the line VIII-VIII of FIG. 図４のＩＸ−ＩＸ線で切断した断面図。FIG. 4 is a cross-sectional view taken along the line IX-IX of FIG. 図９と同じ断面においてドーム部の反転状態を示す断面図。The cross-sectional view which shows the inverted state of the dome part in the same cross section as FIG. 図９と同じ断面において図１０に示す状態からさらに押圧操作された最大操作量での状態を示す断面図。FIG. 5 is a cross-sectional view showing a state in the same cross section as in FIG. 9 with a maximum operation amount further pressed from the state shown in FIG.

以下、本発明の各実施形態について、添付の図面を参照しながら説明する。なお、各実施形態に係る明細書及び図面の記載に関して、実質的に同一の機能構成を有する構成要素については、同一の符号を付することにより重畳した説明を省略する。 Hereinafter, each embodiment of the present invention will be described with reference to the accompanying drawings. Regarding the description of the specification and the drawings according to each embodiment, the components having substantially the same functional configuration are designated by the same reference numerals, and the superimposed description will be omitted.

図１は、一実施形態のプッシュスイッチ１を、斜め上方から見た分解斜視図である。図２は、プッシュスイッチ１を斜め下方から見た分解斜視図である。図３は、プッシュスイッチ１を示す斜視図である。図４は、プッシュスイッチ１を示す平面図である。図５は、可動接点部材１０を示す平面図である。図６は、可動接点部材１０を示す側面図である。図７は、可動接点部材１０を示す底面図である。図８は、図６のＶＩＩＩ−ＶＩＩＩ線で切断した断面図である。図９は、図４のＩＸ−ＩＸ線で切断した断面図である。図１０は、図９と同じ断面においてドーム部の反転状態を示す断面図である。図１１は、図９と同じ断面において図１０に示す状態からさらに押圧操作された最大操作量での状態を示す断面図である。 FIG. 1 is an exploded perspective view of the push switch 1 of one embodiment as viewed from diagonally above. FIG. 2 is an exploded perspective view of the push switch 1 as viewed from diagonally below. FIG. 3 is a perspective view showing the push switch 1. FIG. 4 is a plan view showing the push switch 1. FIG. 5 is a plan view showing the movable contact member 10. FIG. 6 is a side view showing the movable contact member 10. FIG. 7 is a bottom view showing the movable contact member 10. FIG. 8 is a cross-sectional view taken along the line VIII-VIII of FIG. FIG. 9 is a cross-sectional view taken along the line IX-IX of FIG. FIG. 10 is a cross-sectional view showing an inverted state of the dome portion in the same cross section as in FIG. FIG. 11 is a cross-sectional view showing a state in the same cross section as in FIG. 9 with a maximum operation amount further pressed from the state shown in FIG.

プッシュスイッチ１は、図１及び図２に示すように、収容部３１を備えたハウジング３０と、収容部３１に配置される可動接点部材１０と、収容部３１を覆うシート部材４０とを備えている。 As shown in FIGS. 1 and 2, the push switch 1 includes a housing 30 having an accommodating portion 31, a movable contact member 10 arranged in the accommodating portion 31, and a seat member 40 covering the accommodating portion 31. There is.

ハウジング３０は、絶縁材料の合成樹脂を用いて射出成形されており、収容部３１のＺ１側に開口を有する箱型の外形を備えている。ハウジング３０には、後述する固定接点部材２０が埋設されている。 The housing 30 is injection-molded using a synthetic resin as an insulating material, and has a box-shaped outer shape having an opening on the Z1 side of the housing portion 31. A fixed contact member 20, which will be described later, is embedded in the housing 30.

固定接点部材２０は、導電性の金属材からなり、図１に示すように、収容部３１の収容底面３１ａの中央部に露出する第１固定接点部２１と、収容底面３１ａの外縁部に露出する第２固定接点部２２とを有している。また、固定接点部材２０は、第１固定接点部２１に接続された第１端子部２０ｃと、第２固定接点部２２に接続された第２端子部２０ｄとを備えている。第１端子部２０ｃ及び第２端子部２０ｄは、図１及び図２に示すように、ハウジング３０の側面から外方に露出して設けられている。なお、ハウジング３０が絶縁材料の材料で形成されているので、第１固定接点部２１と第２固定接点部２２とは、電気的に絶縁されており、同様に第１端子部２０ｃと第２端子部２０ｄとは絶縁されている。固定接点部材２０とハウジング３０とは、例えばインサート成形によって一体化される。 The fixed contact member 20 is made of a conductive metal material, and as shown in FIG. 1, the first fixed contact portion 21 exposed at the center of the accommodation bottom surface 31a of the accommodation portion 31 and the outer edge portion of the accommodation bottom surface 31a are exposed. It has a second fixed contact portion 22 to be formed. Further, the fixed contact member 20 includes a first terminal portion 20c connected to the first fixed contact portion 21 and a second terminal portion 20d connected to the second fixed contact portion 22. As shown in FIGS. 1 and 2, the first terminal portion 20c and the second terminal portion 20d are provided so as to be exposed to the outside from the side surface of the housing 30. Since the housing 30 is made of an insulating material, the first fixed contact portion 21 and the second fixed contact portion 22 are electrically insulated, and similarly, the first terminal portion 20c and the second fixed contact portion 20c and the second fixed contact portion 22 are electrically insulated from each other. It is insulated from the terminal portion 20d. The fixed contact member 20 and the housing 30 are integrated by, for example, insert molding.

シート部材４０は、可撓性を有する絶縁材料の合成樹脂からなり、操作部４１がＺ１方向に突出するとともに、後述するドーム部１０ａを押圧する押圧部材４５が操作部４１のＺ２側に配置されている。押圧部材４５は、円柱状に設けられており、ドーム部１０ａのＺ１側の面の一部と接触する押圧部４５ａ（Ｚ２側の面）を有する。押圧部材４５は円柱状であるため、押圧部４５ａは平面視で円形状となる。シート部材４０は、押圧部４５ａの周りが薄肉のシート状になっており、あらかじめＺ１方向に膨出した形状に加工されてから、可動接点部材１０が収容された収容部３１を覆って、ハウジング３０の外周部分に溶着や粘着材で取り付けられている。シート部材４０をハウジング３０に取り付けることにより、押圧部材４５が可動接点部材１０上に配置される。 The sheet member 40 is made of a synthetic resin of a flexible insulating material, and the operating portion 41 projects in the Z1 direction, and the pressing member 45 for pressing the dome portion 10a, which will be described later, is arranged on the Z2 side of the operating portion 41. ing. The pressing member 45 is provided in a columnar shape, and has a pressing portion 45a (a surface on the Z2 side) that comes into contact with a part of the surface on the Z1 side of the dome portion 10a. Since the pressing member 45 is cylindrical, the pressing portion 45a has a circular shape in a plan view. The seat member 40 has a thin sheet shape around the pressing portion 45a, is processed in advance in a shape that bulges in the Z1 direction, and then covers the accommodating portion 31 in which the movable contact member 10 is accommodated to cover the housing. It is attached to the outer peripheral portion of 30 by welding or an adhesive material. By attaching the seat member 40 to the housing 30, the pressing member 45 is arranged on the movable contact member 10.

可動接点部材１０は、いわゆるメタルコンタクトであり、弾性及び導電性を有する金属板からなり、収容部３１に配置されている。可動接点部材１０は、図１及び図２に示すように、膨出した形状のドーム部１０ａと、ドーム部１０ａを支持する脚部１０ｂと、開口部１０ｄによって舌片状に区画され、根元１０ｅから屈曲された２つの接片部１０ｆと、を有している。この接片部１０ｆは、図１及び図２に示すように、その先端部に凸部１１を設けられている。 The movable contact member 10 is a so-called metal contact, is made of an elastic and conductive metal plate, and is arranged in the accommodating portion 31. As shown in FIGS. 1 and 2, the movable contact member 10 is divided into a tongue piece shape by a dome portion 10a having a bulging shape, a leg portion 10b supporting the dome portion 10a, and an opening portion 10d, and has a root 10e. It has two contact portions 10f bent from the dome. As shown in FIGS. 1 and 2, the contact portion 10f is provided with a convex portion 11 at its tip.

ドーム部１０ａはドーム状に膨出した形状を有し、膨出する方向（図１のＺ１方向）からの平面視で円形状である。ドーム部１０ａは、膨出方向（Ｚ１方向）からの押圧操作によって、膨出する方向が反転する反転動作可能な形状を有している。また、この押圧操作から解放されると元の膨出する方向に復帰する弾性を有している。 The dome portion 10a has a dome-shaped bulging shape, and is circular in a plan view from the bulging direction (Z1 direction in FIG. 1). The dome portion 10a has a shape capable of reversing operation in which the bulging direction is reversed by a pressing operation from the bulging direction (Z1 direction). Further, it has elasticity to return to the original bulging direction when released from this pressing operation.

脚部１０ｂは、ドーム部１０ａの外周端部から外方へ延出して４つ形成されている。このうち２つの脚部１０ｂが、第２固定接点部２２に接触するように配置される。脚部１０ｂは、押圧操作によってドーム部１０ａが反転動作する際にはドーム部１０ａの外周端部を支持し、ドーム部１０ａの反転動作後には撓むことが可能な弾性力を備えている。後述するように、脚部１０ｂは、ドーム部１０ａが反転動作した際に、接片部１０ｆの凸部１１が第１固定接点部２１に接触可能となる長さ（高さ）を有している。 Four legs 10b are formed so as to extend outward from the outer peripheral end of the dome portion 10a. Of these, the two legs 10b are arranged so as to come into contact with the second fixed contact portion 22. The leg portion 10b has an elastic force capable of supporting the outer peripheral end portion of the dome portion 10a when the dome portion 10a is inverted by the pressing operation and bending after the dome portion 10a is inverted. As will be described later, the leg portion 10b has a length (height) that allows the convex portion 11 of the contact piece portion 10f to come into contact with the first fixed contact portion 21 when the dome portion 10a reverses. There is.

可動接点部材１０は、図５に示すように、ドーム部１０ａの頂部側から平面視したときに、ドーム部１０ａの半径方向に延びる２つの接片部１０ｆが、開口部１０ｄによって舌片状に区画されている。２つの接片部１０ｆは、ドーム部１０ａの頂点１０ｃを中心に対称に、すなわち、１８０°間隔に配置されている。各接片部１０ｆは、根元１０ｅが接触領域ＣＲの外側に配置され、先端部が接触領域ＣＲの内側に配置されている。接触領域ＣＲは、ドーム部１０ａにおける、押圧部材４５の押圧部４５ａと接触する領域であり、ドーム部１０ａの頂部を含む。図５に示すように、ドーム部１０ａの頂部は非開口であるため、押圧部４５ａは、当該頂部と接触し、ドーム部１０ａを押圧する。押圧部４５ａが円形であるため、接触領域ＣＲも円形となる。 As shown in FIG. 5, in the movable contact member 10, when viewed in a plan view from the top side of the dome portion 10a, the two contact pieces 10f extending in the radial direction of the dome portion 10a form a tongue piece shape by the opening 10d. It is partitioned. The two contact portions 10f are arranged symmetrically about the apex 10c of the dome portion 10a, that is, at an interval of 180 °. In each contact portion 10f, the root portion 10e is arranged outside the contact region CR, and the tip portion is arranged inside the contact region CR. The contact region CR is a region of the dome portion 10a that comes into contact with the pressing portion 45a of the pressing member 45, and includes the top of the dome portion 10a. As shown in FIG. 5, since the top of the dome portion 10a is not open, the pressing portion 45a comes into contact with the top and presses the dome portion 10a. Since the pressing portion 45a is circular, the contact region CR is also circular.

図８から分かるように、接片部１０ｆは、根元１０ｅから、ドーム部１０ａの内側に向かって屈曲されている。このため、接片部１０ｆの先端部は、ドーム部１０ａの頂部よりドーム部１０ａの内側（Ｚ２側）に位置する。すなわち、押圧部４５ａ（押圧部材４５）から受ける操作荷重はドーム部１０ａの頂部を含む非開口の部分（被押圧部）で受け、接片部１０ｆには操作荷重が直接加わりにくい構造である。 As can be seen from FIG. 8, the contact portion 10f is bent from the root 10e toward the inside of the dome portion 10a. Therefore, the tip end portion of the contact portion 10f is located inside (Z2 side) of the dome portion 10a from the top portion of the dome portion 10a. That is, the operating load received from the pressing portion 45a (pressing member 45) is received by the non-opening portion (pressed portion) including the top of the dome portion 10a, and the operating load is unlikely to be directly applied to the contact portion 10f.

接片部１０ｆの先端部に設けられた凸部１１は、ドーム部１０ａの内側（Ｚ２側）に向かって突出する半球状に形成されている。なお、上記のような可動接点部材１０の形状は、金型を用いた金属板の打ち抜き加工及びプレス加工と折り曲げ加工との組み合わせによって形成可能である。 The convex portion 11 provided at the tip end portion of the contact piece portion 10f is formed in a hemispherical shape protruding toward the inside (Z2 side) of the dome portion 10a. The shape of the movable contact member 10 as described above can be formed by a combination of punching and pressing of a metal plate using a die and bending.

次に、本実施形態のプッシュスイッチ１の動作について説明する。 Next, the operation of the push switch 1 of the present embodiment will be described.

図９に示すように、可動接点部材１０はハウジング３０の収容部３１に配置され、押圧部材４５は押圧部４５ａとドーム部１０ａの頂部とが接するように、ドーム部１０ａ上に配置される。操作部４１が押圧されていない初期状態では、図９に示すように、可動接点部材１０（ドーム部１０ａ及び接片部１０ｆ）と第１固定接点部２１とは離間している。なお、可動接点部材１０は、２個の脚部１０ｂが第２固定接点部２２に接して、第２固定接点部２２との電気的な導通状態が得られている。 As shown in FIG. 9, the movable contact member 10 is arranged in the accommodating portion 31 of the housing 30, and the pressing member 45 is arranged on the dome portion 10a so that the pressing portion 45a and the top of the dome portion 10a are in contact with each other. In the initial state in which the operating portion 41 is not pressed, as shown in FIG. 9, the movable contact member 10 (dome portion 10a and contact portion 10f) and the first fixed contact portion 21 are separated from each other. In the movable contact member 10, the two legs 10b are in contact with the second fixed contact portion 22, and an electrically conductive state with the second fixed contact portion 22 is obtained.

操作部４１（押圧部材４５）が押圧操作され、ドーム部１０ａが反転状態になると、図１０に示すように、接片部１０ｆがＺ２方向に移動して、第１固定接点部２１側に向かって凸状に設けられた凸部１１が第１固定接点部２１に接触する。接片部１０ｆは、ドーム部１０ａが反転動作する弾性力に比べて小さな弾性力となるように設定されており、撓みやすくなっている。このため、接片部１０ｆは、凸部１１が第１固定接点部２１に接触して、根元１０ｅを支点に先端側がわずかに弾性変形して接触が安定に保たれている。接触する部位が凸部１１であるため、後述するように、電気的にも安定した接触が得られる。なお、凸部１１が第１固定接点部２１に接触するタイミングは、ドーム部１０ａの反転途中から反転終了までの間で適宜設定することが可能である。そして、ドーム部１０ａの反転終了時には接片部１０ｆの凸部１１のみが第１固定接点部２１に接触するように、初期状態での可動接点部材１０の形状及び第１固定接点部２１との離間距離を設定することが可能である。こうすれば、第１固定接点部２１との接触において、相対的に衝突エネルギーが大きくなるドーム部１０ａの衝突がこの段階では生じていないので、衝突音を小さくするという効果を得ることもできる。 When the operation unit 41 (pressing member 45) is pressed and the dome portion 10a is in the inverted state, the contact portion 10f moves in the Z2 direction and faces the first fixed contact portion 21 side as shown in FIG. The convex portion 11 provided in a convex shape comes into contact with the first fixed contact portion 21. The contact piece portion 10f is set so that the elastic force of the dome portion 10a is smaller than the elastic force of the reversing operation, and the contact piece portion 10f is easily bent. Therefore, in the contact piece portion 10f, the convex portion 11 comes into contact with the first fixed contact portion 21, and the tip side thereof is slightly elastically deformed with the root 10e as a fulcrum to maintain stable contact. Since the contact portion is the convex portion 11, electrically stable contact can be obtained as described later. The timing at which the convex portion 11 comes into contact with the first fixed contact portion 21 can be appropriately set from the middle of inversion of the dome portion 10a to the end of inversion. Then, at the end of inversion of the dome portion 10a, the shape of the movable contact member 10 in the initial state and the first fixed contact portion 21 are contacted so that only the convex portion 11 of the contact piece portion 10f comes into contact with the first fixed contact portion 21. It is possible to set the separation distance. In this way, in the contact with the first fixed contact portion 21, the collision of the dome portion 10a, which has a relatively large collision energy, does not occur at this stage, so that the effect of reducing the collision sound can be obtained.

可動接点部材１０と第１固定接点部２１との電気的な導通は、図１０に示す状態で開始される。第１固定接点部２１は、可動接点部材１０を介して第２固定接点部２２と導通する。すなわち、スイッチがオンになる。図１０に示す状態では、接片部１０ｆの凸部１１が安定して第１固定接点部２１に接触している。もし、接片部１０ｆに凸部１１を設けずに、同様な動作を行わせると、接片部１０ｆの先端断面１０ｇが接触することになる。先端断面１０ｇは特殊な加工で形成される場合を除き、破断面であり、第１固定接点部２１との接触状態を安定化させることが困難である。また、先端断面１０ｇが尖っていると、第１固定接点部２１に突き刺さったり、第１固定接点部２１を削って削りカスを生じたりするため、繰り返し操作での動作が不安定になってしまうおそれがあった。本実施形態では、接片部１０ｆの凸部１１として半球状の平滑な面を容易に得ることができるので、安定した接触状態が得られ、電気的な導通が安定するとともに、接触する際の不具合が生じにくくなっている。 Electrical conduction between the movable contact member 10 and the first fixed contact portion 21 is started in the state shown in FIG. The first fixed contact portion 21 conducts with the second fixed contact portion 22 via the movable contact member 10. That is, the switch is turned on. In the state shown in FIG. 10, the convex portion 11 of the contact piece portion 10f is in stable contact with the first fixed contact portion 21. If the same operation is performed without providing the convex portion 11 on the contact piece portion 10f, the tip cross section 10 g of the contact piece portion 10f will come into contact with each other. The tip cross section of 10 g is a fracture surface unless it is formed by a special process, and it is difficult to stabilize the contact state with the first fixed contact portion 21. Further, if the tip cross section of 10 g is sharp, the first fixed contact portion 21 may be pierced or the first fixed contact portion 21 may be scraped to generate shavings, so that the operation in repeated operations becomes unstable. There was a risk. In the present embodiment, a hemispherical smooth surface can be easily obtained as the convex portion 11 of the contact piece portion 10f, so that a stable contact state can be obtained, electrical conduction is stable, and contact is performed. Problems are less likely to occur.

そして、可動接点部材１０は、ドーム部１０ａの反転動作の移動距離より長い（高さのある）脚部１０ｂを有し、凸部１１を介して可動接点部材１０と第１固定接点部２１との電気的な導通が開始されてから、さらなる弾性変形が可能に設けられている。図１０の状態からさらに操作部４１が押圧操作された最大操作量では、図１１に示すように、脚部１０ｂ及び接片部１０ｆが撓むことによって反転状態のドーム部１０ａ全体が第１固定接点部２１に接近し、接片部１０ｆの凸部１１が押圧部４５ａと第１固定接点部２１との間に挟まれる状態になる。この状態からは、これ以上弾性変形しにくいため、操作者に感じられる操作荷重が急激に増大する。このとき、上述したように、可動接点部材１０と第１固定接点部２１との電気的な導通はすでになされているため、電気的な接離状態は変化しない。 The movable contact member 10 has a leg portion 10b (having a height) longer than the moving distance of the reversing operation of the dome portion 10a, and the movable contact member 10 and the first fixed contact portion 21 are connected to each other via the convex portion 11. After the electrical conduction of the dome is started, further elastic deformation is possible. At the maximum operating amount in which the operating portion 41 is further pressed from the state of FIG. 10, as shown in FIG. 11, the entire dome portion 10a in the inverted state is first fixed due to the bending of the leg portion 10b and the contact portion 10f. The contact portion 21 is approached, and the convex portion 11 of the contact piece portion 10f is sandwiched between the pressing portion 45a and the first fixed contact portion 21. From this state, the elastic deformation is less likely to occur, so that the operating load felt by the operator increases sharply. At this time, as described above, since the movable contact member 10 and the first fixed contact portion 21 are already electrically connected, the electrical contact / disconnection state does not change.

操作部４１の押圧操作を解放すると、可動接点部材１０の弾性力によって初期状態（図９の状態）に復帰する。 When the pressing operation of the operation unit 41 is released, the initial state (state of FIG. 9) is restored by the elastic force of the movable contact member 10.

なお、図１〜図１１では凸部１１を分かりやすく示すために、可動接点部材１０の板厚寸法に対して突出量を大きくしているが、プレス加工によって突出させる場合には板厚寸法の半分程度の突出量にすることが好ましい。 In addition, in FIGS. 1 to 11, in order to show the convex portion 11 in an easy-to-understand manner, the protrusion amount is made larger than the plate thickness dimension of the movable contact member 10, but when the protrusion is projected by press working, the plate thickness dimension is large. It is preferable to reduce the amount of protrusion to about half.

また、プッシュスイッチ１について原理的な動作を分かりやすく説明するために、ドーム部１０ａの反転終了後に脚部１０ｂの撓みを開始するとしたが、厳密にはドーム部１０ａの弾性変形と脚部１０ｂの弾性変形とが同時に進行するものである。例えば、脚部１０ｂの弾性変形が容易な場合には、ドーム部１０ａの反転動作中に脚部１０ｂの撓みが進行する。 Further, in order to explain the principle operation of the push switch 1 in an easy-to-understand manner, it is assumed that the leg portion 10b starts to bend after the inversion of the dome portion 10a is completed, but strictly speaking, the elastic deformation of the dome portion 10a and the elastic deformation of the leg portion 10b Elastic deformation proceeds at the same time. For example, when the leg portion 10b is easily elastically deformed, the leg portion 10b is bent during the reversing operation of the dome portion 10a.

以上説明した通り、本実施形態の可動接点部材１０を用いることによって、プッシュスイッチ１は、他の構成部材を追加したり、複雑な加工を追加したりすることなく、操作感触が良好で、かつ、電気的な導通の安定性が良いものとすることができる。また、凸部１１と第１固定接点部２１との電気的な導通が開始されてから、さらなる弾性変形が可能に設けられているので、オーバストローク（導通開始後の押圧操作）が可能なプッシュスイッチ１を実現することができる。言い換えると、凸部１１と第１固定接点部２１との電気的な導通が開始される導通点を、操作部４１の最大操作量より手前に設定することができる。 As described above, by using the movable contact member 10 of the present embodiment, the push switch 1 has a good operation feel without adding other constituent members or complicated processing. , The stability of electrical conduction can be good. Further, since the convex portion 11 and the first fixed contact portion 21 are provided to be further elastically deformed after the electrical conduction is started, an overstroke (pressing operation after the start of conduction) is possible. Switch 1 can be realized. In other words, the conduction point at which electrical conduction between the convex portion 11 and the first fixed contact portion 21 is started can be set before the maximum operation amount of the operation portion 41.

また、本実施形態の可動接点部材１０は、接片部１０ｆの根元１０ｅが、接触領域ＣＲの外側に位置する。このため、操作部４１の押圧操作の過程（図９の状態から図１１の状態までの過程）で、接片部１０ｆの根元１０ｅは、押圧部材４５とは接触せず、押圧部材４５から直接的な荷重を加えられない（図９〜図１１参照）。また、最大操作量まで操作されたとしても、根元１０ｅが第１固定接点部２１と押圧部材４５とにより挟まれることも無く、根元１０ｅの部分が屈曲方向と逆側に反らされることも発生しにくい。このような構成により、押圧部材４５からの荷重によって接片部１０ｆの根元１０ｅにクラックが生じることを抑制し、プッシュスイッチ１の動作寿命を長くすることができる。 Further, in the movable contact member 10 of the present embodiment, the root 10e of the contact piece portion 10f is located outside the contact region CR. Therefore, in the process of pressing the operation unit 41 (the process from the state of FIG. 9 to the state of FIG. 11), the root 10e of the contact portion 10f does not come into contact with the pressing member 45, but directly from the pressing member 45. No specific load is applied (see FIGS. 9 to 11). Further, even if the operation is performed up to the maximum operation amount, the root 10e is not sandwiched between the first fixed contact portion 21 and the pressing member 45, and the portion of the root 10e may be warped in the direction opposite to the bending direction. It is hard to occur. With such a configuration, it is possible to suppress the occurrence of cracks in the root 10e of the contact portion 10f due to the load from the pressing member 45, and to extend the operating life of the push switch 1.

また、上述の通り、操作部４１の押圧操作の過程で、接片部１０ｆの根元１０ｅは、押圧部材４５から荷重を加えられないため、根元１０ｅの強度を高めるための補強部分（例えば、Ｚ２側に突出する凸部）が不要となる。これにより、可動接点部材１０の加工を簡素化できる。また、操作部４１を最大操作量まで押圧操作した場合であっても、補強部分の衝突による衝突音の発生を防ぐことができる。また、仮に根元１０ｅに補強部分を設けたとしても、ドーム部１０ａが反転動作し頂部が第１固定接点部２１に接触する時には、根元１０ｅは頂部より上方に位置し、補強部分は収容部３１（ハウジング３０）の収容底面３１ａには接触しないので、衝突音の発生を防ぐことができる。 Further, as described above, in the process of pressing the operation portion 41, the root 10e of the contact portion 10f cannot be loaded from the pressing member 45, so that a reinforcing portion for increasing the strength of the root 10e (for example, Z2). The convex portion that protrudes to the side) becomes unnecessary. This makes it possible to simplify the processing of the movable contact member 10. Further, even when the operation unit 41 is pressed to the maximum operation amount, it is possible to prevent the generation of collision noise due to the collision of the reinforcing portion. Further, even if a reinforcing portion is provided at the root 10e, when the dome portion 10a reverses and the top comes into contact with the first fixed contact portion 21, the root 10e is located above the top and the reinforcing portion is the accommodating portion 31. Since it does not come into contact with the accommodation bottom surface 31a of the (housing 30), it is possible to prevent the generation of collision noise.

また、本実施形態によれば、接片部１０ｆがドーム部１０ａの頂点１０ｃを中心とした対称な位置に配置されている。したがって、操作部４１を押圧操作した際に生じる操作感触を均一なものとすることができる。また、仮にある接片部１０ｆの先端部（凸部１１）に異物が付着したとしても、接片部１０ｆは複数あるため、他の接片部で電気的な接続を行うことができる。これにより、導通不良の発生リスクを小さくすることができる。 Further, according to the present embodiment, the contact portion 10f is arranged at a symmetrical position centered on the apex 10c of the dome portion 10a. Therefore, the operation feeling generated when the operation unit 41 is pressed can be made uniform. Further, even if a foreign substance adheres to the tip end portion (convex portion 11) of the contact piece portion 10f, since there are a plurality of contact piece portions 10f, electrical connection can be made with the other contact piece portions. Thereby, the risk of occurrence of poor continuity can be reduced.

以上のように、プッシュスイッチ１を具体的に説明したが、本発明は上記の実施形態に限定されるものではなく、要旨を逸脱しない範囲で種々変更して実施することが可能である。例えば次のように変形して実施することができ、これらも本発明の技術的範囲に属する。 Although the push switch 1 has been specifically described as described above, the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the gist. For example, it can be modified as follows, and these also belong to the technical scope of the present invention.

（１）本実施形態において、押圧部材４５は、シート部材４０により位置決めされているが、シート部材４０で位置決めする構成でなくてもよい。例えば、カバー部材の貫通孔に押圧部材４５を挿入することにより、押圧部材４５が位置決めされてもよい。 (1) In the present embodiment, the pressing member 45 is positioned by the seat member 40, but it does not have to be positioned by the seat member 40. For example, the pressing member 45 may be positioned by inserting the pressing member 45 into the through hole of the cover member.

（２）本実施形態において、固定接点部材２０は、ハウジング３０の収容底面３１ａに埋設されているが、シート状の部材の片面にパターン形成されていてもよい。この場合、固定接点部材２０がパターン形成されたシート状の部材に、スペーサ部材を介してシート部材４０を固着すればよい。 (2) In the present embodiment, the fixed contact member 20 is embedded in the accommodation bottom surface 31a of the housing 30, but a pattern may be formed on one side of the sheet-shaped member. In this case, the sheet member 40 may be fixed to the sheet-shaped member on which the fixed contact member 20 is formed in a pattern via the spacer member.

（３）本実施形態において、可動接点部材１０は、ドーム部１０ａを支持する脚部１０ｂが４つ形成されている構成としたが、脚部１０ｂが２個以上形成されている構成であればよい。また、脚部１０ｂを備えていないスカート状の支持構造としてもよい。 (3) In the present embodiment, the movable contact member 10 has a configuration in which four legs 10b for supporting the dome portion 10a are formed, but the movable contact member 10 has a configuration in which two or more legs 10b are formed. good. Further, a skirt-like support structure that does not have the legs 10b may be used.

（４）本実施形態において、可動接点部材１０は、接片部１０ｆを２つ有する構成としたが、１つ又は３つ以上有する構成としてもよい。いずれの場合も、接片部１０ｆの根元１０ｅが接触領域ＣＲの外側に配置されていれば、根元１０ｅにクラックが生じることを抑制し、プッシュスイッチ１の動作寿命を長くすることができる。なお、可動接点部材１０が複数の接片部１０ｆを有する場合には、頂点１０ｃを中心として等間隔に各接片部１０ｆが配置されるのが好ましい。例えば、接片部１０ｆが３つの場合、３つの接片部１０ｆを１２０°間隔に配置し、接片部１０ｆが４つの場合、４つの接片部１０ｆを９０°間隔に配置するのが好ましい。このような構成により、操作部４１を押圧操作した際に生じる操作感触を均一なものとすることができる。 (4) In the present embodiment, the movable contact member 10 has a configuration having two contact piece portions 10f, but may have a configuration having one or three or more. In either case, if the root 10e of the contact portion 10f is arranged outside the contact region CR, it is possible to suppress the occurrence of cracks in the root 10e and extend the operating life of the push switch 1. When the movable contact member 10 has a plurality of contact pieces 10f, it is preferable that the contact pieces 10f are arranged at equal intervals around the apex 10c. For example, when there are three contact portions 10f, it is preferable to arrange the three contact portions 10f at 120 ° intervals, and when there are four contact portions 10f, it is preferable to arrange the four contact portions 10f at 90 ° intervals. .. With such a configuration, the operation feeling generated when the operation unit 41 is pressed can be made uniform.

（５）本実施形態において、ドーム部１０ａ及び押圧部４５ａは平面視で円形状であったが、ドーム部１０ａ及び押圧部４５ａの平面視形状は任意に設計可能である。例えば、ドーム部１０ａの平面視形状は、円形状の両側を直線的に切り欠いた形状（サイドカット形状）や楕円形状であってもよい。また、押圧部４５ａの平面視形状は、楕円形や矩形であってもよい。 (5) In the present embodiment, the dome portion 10a and the pressing portion 45a have a circular shape in a plan view, but the plan view shapes of the dome portion 10a and the pressing portion 45a can be arbitrarily designed. For example, the plan view shape of the dome portion 10a may be a circular shape in which both sides are linearly cut out (side cut shape) or an elliptical shape. Further, the plan view shape of the pressing portion 45a may be an ellipse or a rectangle.

また、本国際出願は、２０１８年６月２０日に出願した日本国特許出願第２０１８−１１７４１６号に基づく優先権を主張するものであり、当該出願の全内容を本国際出願に援用する。 In addition, this international application claims priority based on Japanese Patent Application No. 2018-117416 filed on June 20, 2018, and the entire contents of the application are incorporated into this international application.

１ プッシュスイッチ
１０ 可動接点部材
１０ａ ドーム部
１０ｂ 脚部
１０ｃ 頂点
１０ｄ 開口部
１０ｅ 根元
１０ｆ 接片部
１０ｇ 先端断面
１１ 凸部
２０ 固定接点部材
２０ｃ 第１端子部
２０ｄ 第２端子部
２１ 第１固定接点部
２２ 第２固定接点部
３０ ハウジング
３１ 収容部
３１ａ 収容底面
４０ シート部材
４１ 操作部
４５ 押圧部材
４５ａ 押圧部
ＣＲ 接触領域1 Push switch 10 Movable contact member 10a Dome part 10b Leg part 10c Apex 10d Opening part 10e Root 10f Contact part 10g Tip cross section 11 Convex part 20 Fixed contact member 20c First terminal part 20d Second terminal part 21 First fixed contact part 22 Second fixed contact part 30 Housing 31 Housing part 31a Storage bottom surface 40 Seat member 41 Operation part 45 Pressing member 45a Pressing part CR contact area

Claims (5)

収容部を備えたハウジングと、
前記収容部の収容底面に露出する第１固定接点部と、
ドーム状に膨出したドーム部を有し、前記収容部に配置され、前記ドーム部の反転動作によって前記第１固定接点部と接離可能な可動接点部材と、
前記ドーム部上に配置された押圧部材と、
を備え、
前記ドーム部は、前記押圧部材との接触領域の外側に根元が配置され、前記接触領域の内側に先端部が配置され、前記根元から前記ドーム部の内側に向かって屈曲された接片部を有し、
前記ドーム部は、頂部が非開口である、
プッシュスイッチ。 A housing with a housing and
The first fixed contact portion exposed on the accommodating bottom surface of the accommodating portion and
A movable contact member having a dome-shaped bulging dome portion, arranged in the accommodating portion, and capable of contacting and separating from the first fixed contact portion by a reversing operation of the dome portion.
The pressing member arranged on the dome portion and
With
The base of the dome portion is arranged outside the contact region with the pressing member, the tip portion is arranged inside the contact region, and the contact portion bent from the root toward the inside of the dome portion is formed. Yes, and
The dome portion has a non-opening top.
Push switch. 前記ドーム部は、頂点を中心として等間隔に配置された複数の前記接片部を有する
請求項１に記載のプッシュスイッチ。 The push switch according to claim 1 , wherein the dome portion has a plurality of the contact portions arranged at equal intervals about the apex. 前記ドーム部は、頂点を中心として対称に配置された２つの前記接片部を有する
請求項１又は２に記載のプッシュスイッチ。 The push switch according to claim 1 or 2 , wherein the dome portion has two contact portions symmetrically arranged with respect to the apex. 前記接片部は、前記ドーム部の半径方向に延びる
請求項１から請求項３までのいずれか１項に記載のプッシュスイッチ。 The push switch according to any one of claims 1 to 3 , wherein the contact portion extends in the radial direction of the dome portion. 前記接片部は、先端部に、前記ドーム部の内側に向かって突出した凸部を有する
請求項１から請求項４までのいずれか１項に記載のプッシュスイッチ。 The push switch according to any one of claims 1 to 4 , wherein the contact portion has a convex portion protruding toward the inside of the dome portion at the tip end portion.
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