JP4264684B2

JP4264684B2 - Push switch and manufacturing method thereof

Info

Publication number: JP4264684B2
Application number: JP21125099A
Authority: JP
Inventors: 誠康伊藤
Original assignee: SMK Corp
Current assignee: SMK Corp
Priority date: 1999-07-26
Filing date: 1999-07-26
Publication date: 2009-05-20
Anticipated expiration: 2019-07-26
Also published as: JP2001035296A

Description

【０００１】
【発明の属する技術分野】
本発明は、コンパクトディスクの蓋の開閉等を検出する検出スイッチとしてのプッシュスイッチとその製造方法に関するものである。
【０００２】
【従来の技術】
一般にこの種のプッシュスイッチは、物体検出用のシャフトの先端からハウジングの他端までの長さが精々８ｍｍと極めて小さい。従って、シャフトの進退によりハウジング内の端子に接離する接触片は、その長さが約３ｍｍ、厚さが０．１ｍｍ以下である。
【０００３】
しかるに、従来の接触片は、予めプレスや加締めにより接触ばね部、接点部、固定部などを形成し、これをシャフトに組み込むようになっている。
【０００４】
【発明が解決しようとする課題】
従来のこの種のプッシュスイッチでは、接触片は、予めプレスにより片持ちばねやＵ字ばねに形成し、成形後のシャフトに組み込むようになっているため、接触片における固定部部分のスペースが必要となり、その分接触ばね部のスパンが短くなり、従って、ばね性の優れたベリリウム銅等の高価な金属材料を使用しなければならないという問題があった。また、シャフトと接触片が別体であるため、１つに組み込むための加締めなどの別工程も必要であるという問題もあった。
【０００５】
本発明は、接触ばね部１６のスパンをできるだけ長くとることができ、しかも、安価な材料で特性の優れたものが得られ、加工費も低減できるプッシュスイッチとその製造方法を提供することを目的とするものである。
【０００６】
【課題を解決するための手段】
本発明は、接触片１３を設けたシャフト１２と、このシャフト１２を収納するハウジング１０とを具備し、前記シャフト１２の先端の進退軸部２３の進退に応じてシャフト１２に設けた接触片１３とハウジング１０内の端子１５とを接離してなるプッシュスイッチにおいて、前記接触片１３は、導電性金属板材からなり、基端部の埋込部１７から一方端側に、中央突出端部２１と左右の接触ばね部１６とを、同一面を向いたフォーク状に伸びて形成し、前記左右の接触ばね部１６は、埋込部１７との連結部分から後方へ折曲した後、弧状部１９を持って垂直に立ち上がらせ、この接触ばね部１６の上端部に、半円状に屈曲した接点部２０を形成したものからなり、前記シャフト１２と一体の接触片埋込部２５に、前記接触片１３の埋込部１７を、この埋込部１７から外部へ突出する個所に予め前記弧状部１９を形成して一体成形した後、この弧状部１９をＵ字形に曲げ加工したものを、前記ハウジング１０内の同一面内に設けた左右の前記端子に前記シャフト１２の進退に伴い接離するように組み込んでなることを特徴とするプッシュスイッチである。
【０００７】
以上のようなプッシュスイッチは、導電性金属板材を用い、基端部の埋込部１７から一方端側に、中央突出端部２１と左右の接触ばね部１６とを、同一面を向いたフォーク状に伸びて形成し、前記左右の接触ばね部１６は、埋込部１７との連結部分から後方へ折曲した後、弧状部１９を持って垂直に立ち上がらせ、この接触ばね部１６の上端部に、半円状に屈曲した接点部２０を設けて接触片１３を形成する工程と、この接触片１３の埋込部１７部分を、シャフト１２を成形するための金型に収納して接触片埋込部２５にてモールドし、かつ、進退軸部２３と摺動体部２４を一体に成形してシャフト１２を形成する工程と、前記接触片１３における弧状部１９部分を前記金型内でＵ字形に曲げ加工する工程と、前記接触片１３をシャフト１２に一体成形したものをハウジング１０内の同一面内に設けた左右の前記端子１５に前記シャフト１２の進退に伴い接離するように組み込む工程とによって製造される。
【０００８】
【発明の実施の形態】
以下、本発明の一実施例を図面に基づき説明する。
図５、図６及び図７において、１０は、例えば、長さ、幅、高さがそれぞれ６ｍｍ、４ｍｍ、２ｍｍ程度の上面開口した箱型のハウジングである。このハウジング１０における短手方向（図６中の左側）の側板３２には、シャフト進退孔３３が穿設され、右側の側板３２の内面には、コイルばね１４を係止するばね係合突起３４が形成されている。また、このハウジング１０の底板３５の内面には、長手方向に伸びた第１端子１５ａと第２端子１５ｂからなる端子１５が設けられている。前記第１端子１５ａは、後述のシャフト１２の進退に拘らず一方の接触ばね部１６の接点部２０に常時接触するように長く形成され、また、前記第２端子１５ｂは、通常（図６の状態）では他方の接触ばね部１６の接点部２０に接触せず、シャフト１２を押し込んだとき接触するようにやや短く形成されている。前記第１端子１５ａに連続する第１接続端子部２８ａと、前記第２端子１５ｂに連続する第２接続端子部２８ｂは、それぞれハウジング１０の底板３５内に埋め込まれた後、長手方向の両側板３６から外部へ突出している。前記第１接続端子部２８ａと第２接続端子部２８ｂとで接続端子部２８を構成している。さらに、ハウジング１０の長手方向の側板３２の両外側面には、係止爪部３０が形成され、前記底板３５の下面には、２個の位置決め突部３１が設けられている。
【０００９】
前記ハウジング１０には、図１に示すようなシャフト１２が進退自在に設けられている。このシャフト１２は、前記側板３２のシャフト進退孔３３を進退する進退軸部２３と、前記ハウジング１０の内部を摺動する摺動体部２４からなり、この摺動体部２４には、長手方向に２本の溝部２７が形成され、これらの溝部２７の間には、接触片埋込部２５が設けられ、この接触片埋込部２５には、コイルばね１４を遊嵌するばね係合突部２６が一体に突出している。また、この接触片埋込部２５には、図４に示すような接触片１３が成形時に一体にモールドして形成される。さらに、進退軸部２３と摺動体部２４との境界部分は、シャフト進退孔３３からの抜け止めの段部３６となっている。
【００１０】
この接触片１３は、比較的安価な燐青銅等の導電性金属板材を図４に示すように、打ち抜き後折曲加工したもので、基端部が角形フープ状をなした埋込部１７をなし、この埋込部１７から一方端側には、中央突出端部２１と、左右の接触ばね部１６とでフォーク状に伸び、中央突出端部２１は、連結部１８を経て次の埋込部１７に連結している。前記両側の接触ばね部１６は、埋込部１７との連結部分から一旦後方へ直角に折曲した後弧状部１９を持って垂直に立ち上がらせたもので、この接触ばね部１６の上端部は、半円状に屈曲した接点部２０となっている。
【００１１】
前記ハウジング１０に被せるカバー１１は、図５、図６及び図７に示すように、金属板をコ字形に折曲してなり、両側部には、前記係止爪部３０の係止する係止孔部２９が形成され、また、この両係止爪部３０の下端部からそれぞれカバーの固定端子３７が水平方向に折曲されて形成されている。
【００１２】
次に、本発明によるプッシュスイッチとその製造方法の組立て工程を図８に基づき説明する。
（ａ）接触片１３：予め図４に示すようにプレス品連鎖の状態に形成されているものとする。
（１）第１工程：金型で複数個のシャフト１２を同時成形するときに、プレス品連鎖の各接触片１３の埋込部１７の部分をシャフト１２の接触片埋込部２５部分でモールドするように配置して一体成形する。
（２）第２工程：第１工程と同一金型で接触片１３の接触ばね部１６部分を図１及び図４に鎖線で示すように弧状部１９部分からＵ字曲げ加工を施す。
（３）第３工程：埋込部１７を切断線２２でフープカットし、短冊状する。
（４）第４工程：連結部１８をカットし、突出端部２１を図１及び図４のように曲げる。
【００１３】
（ｂ）コイルばね１４
（１）第１工程：別に作られたコイルばね１４をシャフト１２のばね係合突部２６に組み込む。
【００１４】
（ｃ）端子１５：プレス品連鎖の状態に形成されているものとする。
（１）第１工程：金型で複数個のハウジング１０を同時成形するときに、プレス品連鎖の第１端子１５ａと第２端子１５ｂをハウジング１０の底板３５の上面に露出させ、これらの第１端子１５ａと第２端子１５ｂに連続する第１接続端子部２８ａと２接続端子部２８ｂの一部をモールドし、先端をハウジング１０の側方から外部に突出するようにして一体成形する。
（２）第２工程：ハウジング１０を単品にカットする。
（３）第３工程：単品の各ハウジング１０に（ａ）（４）第４工程で形成された接触片１３付きシャフト１２にコイルばね１４を組み込んだものを組み込む。このとき、コイルばね１４の他端部は、ハウジング１０のばね係合突起３４に係止される。
【００１５】
（ｄ）カバー１１：プレス品連鎖の状態に形成されているものとする。
（１）第１工程：カバー１１を単品にカットする。
（２）第２工程：（ｃ）（３）第３工程で組み込んだものにカバー１１を組み込む。このとき、カバー１１をハウジング１０の上から圧入すると、カバー１１の係止孔部２９とハウジング１０の係止爪部３０が係合して組み込まれる。
（３）第３工程：端子１５の接続端子部２８をカットフォーミングして完成する。
【００１６】
【発明の効果】
本発明は、シャフト１２と一体の接触片埋込部２５に、接触片１３の埋込部１７を、この埋込部１７から外部へ突出する個所に予め弧状部１９を形成して一体成形した後、この弧状部１９をＵ字形に曲げ加工したものをハウジング１０内に組み込むようにしたので、接触片における固定部部分のスペースが可及的に短くでき、その分接触ばね部のスパンを長くでき、安価な金属材料であっても特性の優れたプッシュスイッチとすることができる。また、シャフトと接触片を一体成形したので、組み込み工程が容易になり、加工費を低減することができる。
【００１７】
安価な材料で済むので、材料費を低減することができる。
【図面の簡単な説明】
【図１】本発明によるプッシュスイッチとその製造方法の接触片１３付きシャフト１２の一実施例を示す斜視図である。
【図２】図１における進退軸部２３部分で切断した断面図である。
【図３】図１における溝部２７部分で切断した断面図である。
【図４】本発明のプッシュスイッチとその製造方法に用いられる連鎖した接触片１３の一実施例を示す斜視図である。
【図５】本発明によるプッシュスイッチとその製造方法の一実施例を示すもので、図６及び図７のＡ−Ａ線断面図である。
【図６】本発明によるプッシュスイッチとその製造方法の一実施例を示すもので、図５及び図７のＢ−Ｂ線断面図である。
【図７】本発明によるプッシュスイッチとその製造方法の一実施例を示すもので、図６のＣ−Ｃ線断面図である。
【図８】本発明によるプッシュスイッチとその製造方法の一実施例を示す工程図である。
【符号の説明】
１０…ハウジング、１１…カバー、１２…シャフト、１３…接触片、１４…コイルばね、１５…端子、１５ａ…第１端子、１５ｂ…第２端子、１６…接触ばね部、１７…埋込部、１８…連結部、１９…弧状部、２０…接点部、２１…中央突出端部、２２…切断線、２３…進退軸部、２４…摺動体部、２５…接触片埋込部、２６…ばね係合突部、２７…溝部、２８…接続端子部、２８ａ…第１接続端子部、２８ｂ…第２接続端子部、２９…係止孔部、３０…係止爪部、３１…位置決め突部、３２…側板、３３…シャフト進退孔、３４…ばね係合突起、３５…底板、３６…段部、３７…カバーの固定端子。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a push switch as a detection switch for detecting opening and closing of a lid of a compact disk and a method for manufacturing the same.
[0002]
[Prior art]
In general, this type of push switch has an extremely small length of 8 mm from the tip of the object detection shaft to the other end of the housing. Therefore, the contact piece that contacts and separates from the terminal in the housing as the shaft advances and retreats has a length of about 3 mm and a thickness of 0.1 mm or less.
[0003]
However, the conventional contact piece forms a contact spring part, a contact part, a fixed part, etc. by press or caulking in advance, and these are incorporated into the shaft.
[0004]
[Problems to be solved by the invention]
In this type of conventional push switch, the contact piece is previously formed into a cantilever spring or U-shaped spring by pressing and incorporated into the shaft after molding, so a space for the fixed portion of the contact piece is required. Accordingly, the span of the contact spring portion is shortened accordingly, and therefore there is a problem that an expensive metal material such as beryllium copper having excellent spring properties must be used. In addition, since the shaft and the contact piece are separate, another process such as caulking for incorporation into one is also required.
[0005]
An object of the present invention is to provide a push switch that can make the span of the contact spring portion 16 as long as possible, obtain an excellent material with an inexpensive material, and reduce the processing cost, and a manufacturing method thereof. It is what.
[0006]
[Means for Solving the Problems]
The present invention includes a shaft 12 provided with a contact piece 13 and a housing 10 for housing the shaft 12, and the contact piece 13 provided on the shaft 12 according to the advance / retreat of the advance / retreat shaft portion 23 at the tip of the shaft 12. In the push switch in which the terminal 15 in the housing 10 is contacted and separated, the contact piece 13 is made of a conductive metal plate material, and a central projecting end portion 21 is formed on one end side from the embedded portion 17 of the base end portion. The left and right contact spring portions 16 are formed to extend in a fork shape facing the same surface, and the left and right contact spring portions 16 are bent rearward from the connecting portion with the embedded portion 17 and then the arc-shaped portion 19. The contact spring portion 16 is formed in a semicircular contact portion 20 at the upper end portion of the contact spring portion 16, and the contact piece embedded portion 25 integral with the shaft 12 has the contact portion embedded therein. Embedded portion 17 of piece 13 After integrally molded to form the arcuate portion 19 in advance at a location that protrudes from the embedded portion 17 to the outside, the arcuate portion 19 a that is bent in a U-shape, in the same surface of the housing 10 The push switch is assembled so as to be brought into and out of contact with the provided left and right terminals as the shaft 12 advances and retreats .
[0007]
The push switch as described above uses a conductive metal plate material, and has a central projecting end portion 21 and left and right contact spring portions 16 facing the same surface from the embedded portion 17 of the base end portion to one end side. The left and right contact spring portions 16 are bent rearward from the connecting portion with the embedded portion 17 and then raised vertically with an arc-shaped portion 19, and the upper ends of the contact spring portions 16 are formed. A step of forming a contact piece 13 by providing a contact portion 20 bent in a semicircular shape, and an embedded portion 17 portion of the contact piece 13 accommodated in a mold for forming the shaft 12 Molding in the piece embedding portion 25 and forming the shaft 12 by integrally forming the advancing / retreating shaft portion 23 and the sliding body portion 24, and the arc-shaped portion 19 portion of the contact piece 13 in the mold a step of bending into a U-shape, a pre SL contact piece 13 shaft 12 It is produced by the step of incorporating together molded those to the terminal 15 of the right and left provided on the same surface of the housing 10 with the forward and backward of the shaft 12 toward and away from.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
5, 6, and 7, reference numeral 10 denotes a box-shaped housing having an open top surface with a length, width, and height of about 6 mm, 4 mm, and 2 mm, respectively. A shaft advancement / retraction hole 33 is formed in a side plate 32 in the short side direction (left side in FIG. 6) of the housing 10, and a spring engagement protrusion 34 that locks the coil spring 14 on the inner surface of the right side plate 32. Is formed. A terminal 15 comprising a first terminal 15a and a second terminal 15b extending in the longitudinal direction is provided on the inner surface of the bottom plate 35 of the housing 10. The first terminal 15a is formed long so as to be always in contact with the contact portion 20 of one contact spring portion 16 regardless of the advancement and retraction of the shaft 12 described later, and the second terminal 15b is usually (see FIG. 6). In the state), the contact spring portion 16 of the other contact spring portion 16 is not brought into contact with the contact spring portion 16, but is formed slightly shorter so as to come into contact when the shaft 12 is pushed in. The first connection terminal portion 28a continuous to the first terminal 15a and the second connection terminal portion 28b continuous to the second terminal 15b are respectively embedded in the bottom plate 35 of the housing 10, and then both side plates in the longitudinal direction. Projecting from 36 to the outside. The first connection terminal portion 28a and the second connection terminal portion 28b constitute a connection terminal portion 28. Further, locking claws 30 are formed on both outer side surfaces of the side plate 32 in the longitudinal direction of the housing 10, and two positioning projections 31 are provided on the lower surface of the bottom plate 35.
[0009]
The housing 10 is provided with a shaft 12 as shown in FIG. The shaft 12 includes an advancing / retreating shaft portion 23 that advances and retreats through the shaft advance / retreat hole 33 of the side plate 32 and a sliding body portion 24 that slides inside the housing 10. The sliding body portion 24 includes 2 in the longitudinal direction. The groove portions 27 are formed, and a contact piece embedding portion 25 is provided between the groove portions 27, and a spring engaging protrusion 26 that loosely fits the coil spring 14 is provided in the contact piece embedding portion 25. Projecting together. Further, the contact piece embedded portion 25 is formed by integrally molding the contact piece 13 as shown in FIG. Further, a boundary portion between the advancing / retreating shaft portion 23 and the sliding body portion 24 serves as a step portion 36 for preventing the shaft from advancing / retreating from the shaft 33.
[0010]
The contact piece 13 is formed by bending a relatively inexpensive conductive metal plate material such as phosphor bronze as shown in FIG. 4 after punching, and a base end portion of the embedded portion 17 having a square hoop shape. None, on one end side from the embedded portion 17, the central projecting end portion 21 and the left and right contact spring portions 16 extend in a fork shape, and the central projecting end portion 21 is connected to the next embedded portion via the connecting portion 18. It is connected to the part 17. The contact spring portions 16 on both sides are vertically raised from the connecting portion with the embedded portion 17 by a rear arc-shaped portion 19 once bent at a right angle, and the upper end portion of the contact spring portion 16 is The contact portion 20 is bent in a semicircular shape.
[0011]
As shown in FIGS. 5, 6, and 7, the cover 11 that covers the housing 10 is formed by bending a metal plate into a U-shape, and on both sides, the engagement claw portion 30 is engaged. A stop hole portion 29 is formed, and a fixing terminal 37 of the cover is formed by being bent in the horizontal direction from the lower end portions of both the locking claws 30.
[0012]
Next, the assembly process of the push switch and the manufacturing method thereof according to the present invention will be described with reference to FIG.
(A) Contact piece 13: It is assumed that the contact piece 13 is previously formed in a press product chain state as shown in FIG.
(1) First step: When simultaneously forming a plurality of shafts 12 with a mold, the embedded portion 17 portion of each contact piece 13 of the press product chain is molded with the contact piece embedded portion 25 portion of the shaft 12. It arranges so that it may carry out and it forms integrally.
(2) Second step: U-bending is performed on the contact spring portion 16 portion of the contact piece 13 from the arc-shaped portion 19 portion as shown by a chain line in FIGS. 1 and 4 in the same mold as in the first step.
(3) 3rd process: The embedding part 17 is hoop-cut by the cutting line 22, and is made into a strip shape.
(4) 4th process: The connection part 18 is cut and the protrusion edge part 21 is bent like FIG.1 and FIG.4.
[0013]
(B) Coil spring 14
(1) 1st process: The coil spring 14 made separately is integrated in the spring engaging protrusion 26 of the shaft 12.
[0014]
(C) Terminal 15: It shall be formed in the state of a press product chain.
(1) First step: When simultaneously forming a plurality of housings 10 with a mold, the first terminal 15a and the second terminal 15b of the press product chain are exposed on the upper surface of the bottom plate 35 of the housing 10, and A part of the first connection terminal portion 28a and the second connection terminal portion 28b continuous to the 1 terminal 15a and the second terminal 15b is molded, and the tip is integrally formed so as to protrude from the side of the housing 10 to the outside.
(2) Second step: The housing 10 is cut into a single item.
(3) Third step: Each of the housings 10 is assembled with the shaft 12 with the contact piece 13 formed in (a) (4) the fourth step and the coil spring 14 incorporated therein. At this time, the other end of the coil spring 14 is locked to the spring engaging protrusion 34 of the housing 10.
[0015]
(D) Cover 11: It shall be formed in the state of a press product chain.
(1) 1st process: The cover 11 is cut into single goods.
(2) Second step: (c) (3) The cover 11 is incorporated into the one incorporated in the third step. At this time, when the cover 11 is press-fitted from above the housing 10, the locking hole 29 of the cover 11 and the locking claw 30 of the housing 10 are engaged and incorporated.
(3) Third step: The connection terminal portion 28 of the terminal 15 is cut and completed.
[0016]
【The invention's effect】
In the present invention, an embedded portion 17 of the contact piece 13 is integrally formed in the contact piece embedded portion 25 integral with the shaft 12 by previously forming an arcuate portion 19 at a portion protruding from the embedded portion 17 to the outside. Thereafter, the arc-shaped portion 19 bent into a U shape is incorporated into the housing 10, so that the space of the fixed portion of the contact piece can be shortened as much as possible, and the span of the contact spring portion is increased accordingly. Even if it is a cheap metal material, it can be set as the push switch excellent in the characteristic. In addition, since the shaft and the contact piece are integrally formed, the assembling process is facilitated, and the processing cost can be reduced.
[0017]
Since an inexpensive material is sufficient, the material cost can be reduced.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of a shaft 12 with a contact piece 13 of a push switch and a manufacturing method thereof according to the present invention.
FIG. 2 is a cross-sectional view taken along the advancing / retreating shaft portion 23 in FIG.
3 is a cross-sectional view taken along a groove 27 in FIG. 1. FIG.
FIG. 4 is a perspective view showing an embodiment of the chained contact piece 13 used in the push switch of the present invention and the manufacturing method thereof.
FIG. 5 is a cross-sectional view taken along line AA of FIGS. 6 and 7, showing an embodiment of the push switch and the manufacturing method thereof according to the present invention.
FIG. 6 is a cross-sectional view taken along the line BB of FIGS. 5 and 7, showing an embodiment of the push switch and the manufacturing method thereof according to the present invention.
7 is a cross-sectional view taken along line CC of FIG. 6, showing an embodiment of the push switch and the manufacturing method thereof according to the present invention.
FIG. 8 is a process diagram showing an embodiment of a push switch and a manufacturing method thereof according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Housing, 11 ... Cover, 12 ... Shaft, 13 ... Contact piece, 14 ... Coil spring, 15 ... Terminal, 15a ... First terminal, 15b ... Second terminal, 16 ... Contact spring part, 17 ... Embedded part, DESCRIPTION OF SYMBOLS 18 ... Connection part, 19 ... Arc-shaped part, 20 ... Contact part, 21 ... Center protrusion end part, 22 ... Cutting line, 23 ... Advance / retreat shaft part, 24 ... Sliding body part, 25 ... Contact piece embedding part, 26 ... Spring Engaging projection, 27 ... groove, 28 ... connection terminal, 28a ... first connection terminal, 28b ... second connection terminal, 29 ... locking hole, 30 ... locking claw, 31 ... positioning projection 32 ... side plate, 33 ... shaft advance / retreat hole, 34 ... spring engagement protrusion, 35 ... bottom plate, 36 ... stepped portion, 37 ... fixed terminal of the cover.

Claims

A push comprising a shaft provided with a contact piece and a housing for housing the shaft, wherein the contact piece provided on the shaft is brought into contact with and separated from a terminal in the housing in accordance with advancement and retraction of the advance / retreat shaft portion at the tip of the shaft. In the switch, the contact piece is made of a conductive metal plate, and extends from the embedded portion of the base end portion to one end side, with the center protruding end portion and the left and right contact spring portions extending in a fork shape facing the same plane. The left and right contact spring portions are bent backward from the connecting portion with the embedded portion, and then vertically raised with an arc-shaped portion, and the upper end portion of the contact spring portion is formed in a semicircular shape. The contact portion is formed by forming a bent contact portion. The contact piece embedded portion is formed in the contact piece embedded portion integral with the shaft, and the arc-shaped portion is formed in advance at a portion protruding from the embedded portion to the outside. And then bending this arcuate part into a U shape Push switch of those Engineering, wherein said to become incorporated into advance and retreat in with toward and away from the shaft to the terminals of the left and right is provided in the same plane within the housing.

A coil spring for energizing the advance of the shaft is interposed between a spring engaging protrusion integrally provided on the shaft and the inner wall of the housing, and the housing is covered with a cover. Item 1. A push switch according to item 1.

A conductive metal plate is used, and a central projecting end and left and right contact springs are formed on one end side from the embedded portion of the base end portion, extending in a fork shape facing the same surface, and the left and right contact The spring part bends backward from the connecting part with the embedded part, then rises vertically with an arc-shaped part, and a contact part bent in a semicircular shape is provided at the upper end of the contact spring part to make contact The step of forming the piece and the embedded portion of the contact piece are housed in a mold for molding the shaft, molded in the contact piece embedded portion, and the advancing / retreating shaft portion and the sliding body portion are integrated. the same surface of the housing and the step of bending the U-shaped arcuate portions within the mold, a material obtained by integrally molding the pre SL contact piece to the shaft in a step of forming a shaft by molding, the contact piece incorporated toward and away from the advance and retreat motions of the shaft to the terminals of the left and right is provided within Method of manufacturing a push switch which is characterized by comprising a degree.

Using a conductive metal plate material, from the embedded portion of the base end portion to one end side, a central protruding end portion, left and right contact spring portions, and a connecting portion continuous from the central protruding end portion to the next embedded portion, The left and right contact springs are formed to extend in the form of a fork facing the same surface. After bending backward from the connecting part with the embedded part, the left and right contact springs rise vertically with an arcuate part. A step of forming a contact piece that is linked in a semicircular shape at the upper end portion of the contact portion, and forming a contact piece that is chained, and the embedded portion of these contact pieces are accommodated in a mold for forming a shaft and contacted A step of molding in a single embedded portion and forming a chained shaft by integrally forming an advance / retreat shaft portion and a sliding body portion, and an arc-shaped portion of each contact piece in a U shape in the mold a step of bending, cutting the connecting portion of the chained the contact piece, Katazuki contact and independently Forming a shift, and a step of integrally molding of the terminals linked respectively housing, a step of cutting the housing linked to separately, the contact pieces in the same plane in the housing are integrally molded to the shaft A push switch manufacturing method comprising: a step of incorporating the left and right terminals into and away from each other as the shaft advances and retreats .

Using a conductive metal plate material, from the embedded portion of the base end portion to one end side, a central protruding end portion, left and right contact spring portions, and a connecting portion continuous from the central protruding end portion to the next embedded portion, The left and right contact springs are formed to extend in the form of a fork facing the same surface. After bending backward from the connecting part with the embedded part, the left and right contact springs rise vertically with an arcuate part. A step of forming a contact piece that is linked in a semicircular shape at the upper end portion of the contact portion, and forming a contact piece that is chained, and the embedded portion of these contact pieces are accommodated in a mold for forming a shaft and contacted A step of molding in a single embedded portion and forming a chained shaft by integrally forming an advance / retreat shaft portion and a sliding body portion, and an arc-shaped portion of each contact piece in a U shape in the mold a step of bending, cutting the connecting portion of the contact piece chained, Katazuki contact and independently A step of forming a shaft, a step of incorporating a coil spring for advancing and retreating the shaft into a spring engaging projection provided integrally with the shaft, a step of integrally forming chained terminals in each housing, and a chained housing as a single unit And the contact piece is integrally formed on the shaft, and the shaft incorporating the coil spring is brought into and out of contact with the left and right terminals provided on the same plane in the independent housing as the shaft advances and retreats. a step of incorporating as method for manufacturing a push switch, characterized in that comprising the step of incorporating as putting the cover on the housing.