JP2008300312A - Pressure switch - Google Patents

Pressure switch Download PDF

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JP2008300312A
JP2008300312A JP2007147790A JP2007147790A JP2008300312A JP 2008300312 A JP2008300312 A JP 2008300312A JP 2007147790 A JP2007147790 A JP 2007147790A JP 2007147790 A JP2007147790 A JP 2007147790A JP 2008300312 A JP2008300312 A JP 2008300312A
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diaphragm
cover
spring
pressure switch
structural member
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Akinori Kitamura
聡紀 喜多村
Masao Futami
正男 二見
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Saginomiya Seisakusho Inc
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Saginomiya Seisakusho Inc
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Priority to JP2007147790A priority Critical patent/JP2008300312A/en
Priority to CNU2008201120693U priority patent/CN201278331Y/en
Publication of JP2008300312A publication Critical patent/JP2008300312A/en
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a pressure switch which has a stable switching property by reducing variation in a spring property of a diaphragm. <P>SOLUTION: A diaphragm structural member 3 and a saucer-shaped spring 5 are press-inserted into a housing hole 2d formed on an electrically conductive body 2, and on the above there is housed an insulating cover 4 in which a terminal pin 8 is integrally formed, and the cover is caulked by a caulking portion 2c of an upper end of the body 2 to formed a pressure switch 1. The diaphragm member 3 has a diaphragm 3b made of a metal which is pinched by an metal upper cover 3a and a lower cover 3c and a welding portion of an outer circumference of the member is welded by laser to make an integrated member. Downward pressed burrs created on a circumferential edge of the lower cover 3c by a pressing process are housed in a burr housing concave portion 7 formed on a circumferential edge portion of a bottom surface of the housing hole 2d of the body 2. Since the laser welding is used, a thermal distortion of the diaphragm 3b is reduced and as result, variations in a spring property are reduced and a switching property can be stabilized. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、ボディアース構造とされた圧力スイッチに関する。   The present invention relates to a pressure switch having a body ground structure.

従来より、自動車等に用いられる圧力スイッチでは、該圧力スイッチが取り付けられた車両機器などへの導電路を形成し、ボディアース構造とすることが行われている。
特許文献１では、金属からなる導電性のボディ（継手）内にスイッチの一方の接点となる金属からなるダイヤフラムを備えたダイヤフラム構造部材を収納し、前記ボディと前記ダイヤフラムとの電気的導通をとる皿バネを前記ダイヤフラム構造部材の上に収納し、さらに絶縁物からなるガイド部材、端子台等を収納して、前記ボディの円周上端をカシメることで圧力スイッチを形成している。
また、特許文献２には、ボディにダイヤフラム構造部材を圧入し、その上に外周にボディに圧接する圧接部が形成された皿バネを載置して、コネクター部の一部を押し当てることにより、皿バネのボディへの接触圧を高める構造を備えた圧力スイッチが記載されている。
特開２００４−０９５５３１号公報 特開２００２−３４３２０７号公報 Conventionally, in a pressure switch used in an automobile or the like, a conductive path to a vehicle device or the like to which the pressure switch is attached is formed to have a body ground structure.
In Patent Document 1, a diaphragm structural member having a diaphragm made of metal that serves as one contact point of a switch is housed in a conductive body (joint) made of metal, and the body and the diaphragm are electrically connected. A disc spring is housed on the diaphragm structural member, a guide member made of an insulator, a terminal block, and the like are housed, and a pressure switch is formed by crimping the circumferential upper end of the body.
Further, in Patent Document 2, a diaphragm structural member is press-fitted into a body, a disc spring having a press-contact portion that presses against the body is placed on the outer periphery thereof, and a part of the connector portion is pressed against it. A pressure switch having a structure for increasing the contact pressure of the disc spring to the body is described.
JP 2004-095531 A JP 2002-343207 A

上述した従来の技術では、皿バネの内周を絶縁物からなるガイド部材とダイヤフラム構造部材とで挟持することで皿バネとダイヤフラム構造部材の電気的導通を図り、皿バネの外周をボディの内周に当接することで皿バネとボディの導通を図ることでダイヤフラム構造部材とボディの電気的導通がなされる構造になっている。
ここで、前記ダイヤフラム構造部材は金属製のアッパーカバーとロアカバーで金属製のダイヤフラムを挟持し、外周部をプラズマ溶接で溶接することにより一体とされていた。
しかし、プラズマ溶接は熱容量が大きいため、溶接時にダイヤフラムが加熱され、ダイヤフラムのバネ特性のばらつきが大きくなるという問題があった。
そこで、ダイヤフラムのバネ特性のばらつきを小さくするために溶接をレーザー溶接で行うことが考えられる。この場合には、ダイヤフラムが加熱されないためダイヤフラムのバネ特性のばらつきが大きくなることはないが、スポット径が小さいためダイヤフラム構造部材のロアカバーの円周上には加工時（プレス抜き時）に発生する加工ダレ（バリ等）が溶融できないため、前記加工ダレを取り除く処理工程、例えば、加工ダレを削り取る工程を必要とした。なお、従来のようにプラズマ溶接を行うときには熱容量が大きいため、溶接時に加工ダレも一緒に溶かし込まれていたので加工ダレを取り除く工程は不要であった。 In the conventional technique described above, the disc spring and the diaphragm structure member are electrically connected by sandwiching the inner periphery of the disc spring between the guide member made of an insulator and the diaphragm structure member. The diaphragm structure member and the body are electrically connected to each other by contacting the circumference with the disc spring and the body.
Here, the diaphragm structural member is integrated by sandwiching a metal diaphragm between a metal upper cover and a lower cover and welding the outer peripheral portion by plasma welding.
However, since plasma welding has a large heat capacity, there is a problem that the diaphragm is heated at the time of welding, resulting in a large variation in the spring characteristics of the diaphragm.
In view of this, it is conceivable that welding is performed by laser welding in order to reduce variations in the spring characteristics of the diaphragm. In this case, since the diaphragm is not heated, the variation in the spring characteristics of the diaphragm does not increase. However, since the spot diameter is small, it occurs on the circumference of the lower cover of the diaphragm structure member during processing (during punching). Since the processing sag (burr or the like) cannot be melted, a processing step for removing the processing sag, for example, a step for removing the processing sag is required. In addition, since the heat capacity is large when plasma welding is performed as in the prior art, the processing sag is also melted at the time of welding, and thus a process of removing the processing sag is unnecessary.

そこで本発明は、このような問題を鑑み、ダイヤフラムのバネ特性を安定させることで安定したスイッチ特性と製造が容易な圧力スイッチを提供することを目的としている。   In view of the above problems, the present invention has an object to provide a pressure switch that is stable and can be easily manufactured by stabilizing the spring characteristics of the diaphragm.

上記目的を達成するために、本発明の圧力スイッチは、ダイヤフラムをアッパーカバーとロアカバーとで挟持して溶接することで一体に形成されたダイヤフラム構造部材と、その一端が外部のコネクターと結合可能なターミナルピンと一体に形成され、前記ターミナルピンの他端に固定結合した電気的接点部材を収納する絶縁性のカバーと、前記ダイヤフラム構造部材と前記カバーとを収納する導電性のボディとを少なくとも備えた圧力スイッチであって、前記導電性のボディは、前記ダイヤフラム構造部材のロアカバーの外周に加工時に形成された加工ダレを収納する凹部を備えたものである。
また、前記ダイヤフラム構造部材はレーザー溶接により一体に形成されたものである。 In order to achieve the above object, a pressure switch according to the present invention includes a diaphragm structural member integrally formed by sandwiching and welding a diaphragm between an upper cover and a lower cover, and one end of which can be coupled to an external connector. An insulating cover that is integrally formed with the terminal pin and houses an electrical contact member fixedly coupled to the other end of the terminal pin, and at least a conductive body that houses the diaphragm structural member and the cover. In the pressure switch, the conductive body includes a recess that accommodates a processing sag formed during processing on the outer periphery of the lower cover of the diaphragm structural member.
The diaphragm structural member is integrally formed by laser welding.

このような本発明の圧力スイッチによれば、ボディにダイヤフラム構造部材のロアカバーの外周の加工バリ（ダレ）を収納する凹部を設けたことで、ダイヤフラム構造部材をレーザー溶接により製造したときであっても、加工バリを削除するための新たな製造工程を増やす必要がなく、さらに、ダイヤフラムのバネ特性のバラツキが小さくすることができることから、スイッチ特性が安定した安価な圧力スイッチを提供することができる。   According to such a pressure switch of the present invention, when the diaphragm structural member is manufactured by laser welding, the body is provided with the recess for storing the processing burr (sag) on the outer periphery of the lower cover of the diaphragm structural member. However, it is not necessary to increase a new manufacturing process for removing the processing burr, and furthermore, since the variation in the spring characteristics of the diaphragm can be reduced, an inexpensive pressure switch with stable switch characteristics can be provided. .

図１は、本発明の圧力スイッチ１の一実施の形態の構成を示す断面図である。
この実施の形態の圧力スイッチは、ダイヤフラム構造部材のダイヤフラムを接点の一端とし、該ダイヤフラムを後述するボディ２と電気的導通をとる構造のボディアース（車体等に）を形成する圧力スイッチである。
図１において、２は、中央に圧力導入孔２ａ１を備え、圧力スイッチ１を変速機等の車両機器に固定することでボディアースをする固定部２ａと、前記圧力導入孔２ａ１の他端に後述するダイヤフラム構造部材３を圧入し、カバー４を収納する円筒状の収納孔２ｄと、該収納孔２ｄに前記カバー４を収納後、上端をカシメることで圧力スイッチ１を形成するカシメ部２ｃとを備え、前記収納孔２ｄの底面に、前記ダイヤフラム構造部材３を円周状で圧接する第１の突設部２ｂと、後述するダイヤフラム構造部材３のロアカバー３ｃの加工ダレを収納するバリ収納凹部７と、前記圧力導入孔２ａ１からの圧力媒体を封止するシール部材９を収納する第１のシール溝１０とを備えた金属からなる導電性のボディである。 FIG. 1 is a cross-sectional view showing a configuration of an embodiment of a pressure switch 1 of the present invention.
The pressure switch of this embodiment is a pressure switch that forms a body ground (in a vehicle body or the like) having a structure in which the diaphragm of the diaphragm structural member has one end of a contact and the diaphragm is electrically connected to a body 2 described later.
In FIG. 1, reference numeral 2 is provided with a pressure introduction hole 2a1 at the center, and a fixing portion 2a for grounding the body by fixing the pressure switch 1 to a vehicle device such as a transmission, and the other end of the pressure introduction hole 2a1 are described later. A cylindrical housing hole 2d for press-fitting the diaphragm structural member 3 to be accommodated and housing the cover 4, and a crimping portion 2c for forming the pressure switch 1 by crimping the upper end after the cover 4 is housed in the housing hole 2d; A burr storage recess for storing a first projecting portion 2b that presses the diaphragm structural member 3 in a circumferential shape on the bottom surface of the storage hole 2d, and a processing sag of a lower cover 3c of the diaphragm structural member 3 to be described later 7 and a conductive body made of metal, including a first seal groove 10 that houses a seal member 9 that seals the pressure medium from the pressure introduction hole 2a1.

３は、前記圧力導入孔２ａ１からの圧力媒体の加圧により中央部が図中上方に変形又は反転し、後述する固定接点１４と接触することで電気的導通し電気的接点となる金属製のダイヤフラム３ｂと、前記ダイヤフラム３ｂを溶接時に押さえるとともに前記ボディ２とのシール面を形成し、中央に前記圧力導入孔２ａ１に連通する円形の孔を備えた金属製のロアカバー３ｃと、前記ダイヤフラム３ｂが前記圧力導入孔２ａ１からの圧力媒体の加圧により上方向に変形又は反転したときに前記ダイヤフラム３ｂのストッパーとなるとともに、固定接点１４が収納できる程度の円形の孔を中央に備えた金属製のアッパーカバー３ａとからなり、ダイヤフラム３ｂをロアカバー３ｃとアッパーカバー３ａで挟持させて外周の溶接部３ｄをレーザー溶接することにより一体に形成されたダイヤフラム構造部材である。
このように、ダイヤフラム構造部材３をレーザー溶接で一体としたことで、プラズマ溶接により一体化した場合と比べてダイヤフラム３ｂに供給される熱量を少なくすることができるため、ダイヤフラム３ｂの熱歪を小さくすることができ、ダイヤフラム３ｂのバネ特性のばらつき、ひいてはスイッチ特性のばらつきを少なくすることができる。 3 is made of a metal that is electrically connected and becomes an electrical contact when the central portion is deformed or inverted upward in the figure by pressurization of the pressure medium from the pressure introduction hole 2a1 and comes into contact with a fixed contact 14 described later. A diaphragm 3b, a metal lower cover 3c that presses the diaphragm 3b during welding and forms a sealing surface with the body 2 and has a circular hole communicating with the pressure introduction hole 2a1 at the center, and the diaphragm 3b It is made of a metal having a circular hole at the center that serves as a stopper for the diaphragm 3b when it is deformed or inverted upward by pressurizing the pressure medium from the pressure introducing hole 2a1 and can accommodate the fixed contact 14. It consists of an upper cover 3a, and the diaphragm 3b is sandwiched between the lower cover 3c and the upper cover 3a, and the outer welded portion 3d is laser welded. It is a diaphragm structure member formed integrally by Rukoto.
As described above, since the diaphragm structural member 3 is integrated by laser welding, the amount of heat supplied to the diaphragm 3b can be reduced as compared with the case where the diaphragm structural member 3 is integrated by plasma welding, so that the thermal strain of the diaphragm 3b is reduced. It is possible to reduce the variation in the spring characteristics of the diaphragm 3b, and hence the variation in the switch characteristics.

４は、上方にコネクタ収納部４ａと、下部に円形凹部の形状をした接点部材収納部４ｂと、前記接点部材収納部４ｂを形成する外周下部に円周にわたって設けられた第２の突設部４ｃと、外周側面に前記接点部材収納部４ｂを外部をシールするシール部材９を収納する第２のシール溝１１とを有し、圧力信号を外部に取りだすターミナルピン８をその一端が前記コネクタ収納部４ａに突出し、他端が前記接点部材収納部４ｂ内に位置するように一体に形成もしくは嵌合させた絶縁体（樹脂）からなるカバーである。なお、ターミナルピン８はカバーに差し込んで固定するようにしてもよい。
図示するように、前記第２の突設部４ｃの端部（突設面）は、ダイヤフラム構造部材３の上面と平行な平坦面とされており、突設面の内側と外側は曲面とされている。 4 is a connector housing portion 4a on the upper side, a contact member housing portion 4b having a circular concave shape on the lower portion, and a second projecting portion provided on the lower periphery of the outer periphery forming the contact member housing portion 4b. 4c and a second seal groove 11 for accommodating a seal member 9 for sealing the outside of the contact member accommodating portion 4b on the outer peripheral side surface, and one end of the terminal pin 8 for taking out a pressure signal is accommodated in the connector. It is a cover made of an insulator (resin) that is integrally formed or fitted so as to protrude from the portion 4a and have the other end positioned in the contact member housing portion 4b. The terminal pin 8 may be fixed by being inserted into the cover.
As shown in the figure, the end portion (projecting surface) of the second projecting portion 4c is a flat surface parallel to the upper surface of the diaphragm structural member 3, and the inside and outside of the projecting surface are curved surfaces. ing.

５は、前記ダイヤフラム構造部材３（アッパーカバー３ａ）の上面と前記カバー４の第２の突設部４ｃとの間に前記ボディ２の内周部に圧接する形態で組み込まれる皿バネである。この皿バネ５により、前記ボディ２と前記ダイヤフラム３ｂとの間の電気的接続が確実なものとされる。
図２は、前記皿バネ５の変面図とその断面図である。
図示するように、皿バネ５は、円盤形状の金属板（例えば、ステンレス）の外周を歯車形状に凹凸に加工し、ａ−ａ断面図に示すように、凸部を上方向に曲げて外側バネ部５ａとして形成し、また、内側を円形に切り欠き、内周より前記外側バネ部５ａで形成される凹部（外側バネ部を形成する凸部の間の凹部）に向けて切欠き部５ｄを形成し、前記切欠き部５ｄで形成された凸部の略中間で下方向に折り曲げて内側バネ部５ｂと板部５ｃを形成したものである。
このように、皿バネ５は、外側に歯車形状に形成された凸部を上方向に折り曲げられた上向き形状の外側バネ部５ａと、内側内周から前記外側バネ部５ａの凹部に向けての切欠き部５ｄにより形成された凸部を下側に折り曲げて形成した下向き形状の内側バネ部５ｂと、前記外側バネ部５ａと前記内側バネ部５ｂの中間の平坦な板部５ｃを有しており、前記外側バネ部５ａの端部が前記ボディ２の内周に圧接し、前記内側バネ部５ｂの端部が前記ダイヤフラム構造部材３の上部に圧接するようになされている。 Reference numeral 5 denotes a disc spring that is incorporated between the upper surface of the diaphragm structural member 3 (upper cover 3a) and the second projecting portion 4c of the cover 4 so as to be in pressure contact with the inner peripheral portion of the body 2. This disc spring 5 ensures the electrical connection between the body 2 and the diaphragm 3b.
FIG. 2 is a sectional view of the disc spring 5 and a sectional view thereof.
As shown in the figure, the disc spring 5 is formed by processing the outer periphery of a disk-shaped metal plate (for example, stainless steel) into a gear shape and then bending the convex portion upward as shown in the aa sectional view. 5d formed as a spring part 5a, with the inside cut into a circular shape, and a cutout part 5d from the inner periphery toward the recess formed by the outer spring part 5a (the recess between the protrusions forming the outer spring part) The inner spring portion 5b and the plate portion 5c are formed by bending downward at substantially the middle of the convex portion formed by the notch portion 5d.
In this way, the disc spring 5 includes an outer spring portion 5a having an upward shape in which a convex portion formed in a gear shape on the outer side is bent upward, and an inner inner periphery toward the concave portion of the outer spring portion 5a. A downwardly-shaped inner spring part 5b formed by bending a convex part formed by the notch part 5d downward, and a flat plate part 5c intermediate between the outer spring part 5a and the inner spring part 5b. The end portion of the outer spring portion 5a is in pressure contact with the inner periphery of the body 2, and the end portion of the inner spring portion 5b is in pressure contact with the upper portion of the diaphragm structural member 3.

図１において、１２は、前記ターミナルピン８の接点部材収納部４ｂ内に位置する部分に形成される接点バネ固定部である。
１３は、一端が前記ターミナルピン８の一端に形成される前記接点バネ固定部１２にスポット溶接もしくはカシメで固定され、他端が固定接点１４にスポット溶接もしくはカシメで固定されるＵ字形状の導電性材料（金属）からなる接点バネである。この接点バネ１３により、前記ダイヤフラム３ｂが変形又は反転して接点がＯＮとなったときの衝撃が吸収される。
１４は、前記圧力導入孔２ａ１から所定の圧力をダイヤフラム３ｂが受け、ダイヤフラム３ｂが変形又は反転したとき該ダイヤフラム３ｂと接触して、前記ボディ２と前記ターミナルピン８を導通状態にする電気接点を備えた固定接点である。 In FIG. 1, reference numeral 12 denotes a contact spring fixing portion formed at a portion of the terminal pin 8 located in the contact member housing portion 4b.
13 is a U-shaped conductive member having one end fixed to the contact spring fixing portion 12 formed at one end of the terminal pin 8 by spot welding or caulking and the other end fixed to the fixed contact 14 by spot welding or caulking. It is a contact spring made of a conductive material (metal). The contact spring 13 absorbs an impact when the diaphragm 3b is deformed or reversed and the contact is turned on.
14, the diaphragm 3b receives a predetermined pressure from the pressure introducing hole 2a1, and contacts the diaphragm 3b when the diaphragm 3b is deformed or inverted, thereby bringing the body 2 and the terminal pin 8 into a conductive state. It is a fixed contact provided.

このように構成された圧力スイッチ１において、前記ボディ２の収納孔２ｄに前記ダイヤフラム構造部材３を圧入し、その上に前記皿バネ５を圧入し、前記カバー４を載置して前記ボディ２のカシメ部２ｃをカシメることで、これらが一体化され、圧力スイッチ１とされる。このとき、前記カバー４の第２の突設部４ｃの端部に形成されている平坦部が前記皿バネ５の板部５ｃに当接し、皿バネ５の内側バネ部５ｂが前記ダイヤフラム構造部材３の上に圧接固定されとともに、その外側バネ部５ａが前記ボディ２の収納孔２ｄの内周に圧接される。また、前記ダイヤフラム構造部材３のロアカバー３ｃの周縁部に下向きにプレス抜きにより発生した加工ダレ（バリ）があったとしても、該加工ダレは前記ボディの収納孔２ｄの底面の周縁部に形成されたバリ収納凹部７に収納されるため、問題となることはない。   In the pressure switch 1 configured as described above, the diaphragm structural member 3 is press-fitted into the housing hole 2d of the body 2, the disc spring 5 is press-fitted thereon, the cover 4 is placed thereon, and the body 2 These are integrated into a pressure switch 1 by caulking the caulking portion 2c. At this time, the flat portion formed at the end of the second projecting portion 4c of the cover 4 abuts on the plate portion 5c of the disc spring 5, and the inner spring portion 5b of the disc spring 5 is the diaphragm structural member. The outer spring portion 5 a is pressed against the inner periphery of the housing hole 2 d of the body 2. Further, even if there is a processing sag (burr) generated by pressing downward at the peripheral edge of the lower cover 3c of the diaphragm structural member 3, the processing sag is formed at the peripheral part of the bottom surface of the housing hole 2d of the body. Since it is stored in the burr storage recess 7, there is no problem.

図３は、皿バネ５をボディ２に組み込んだ状態を示す図１の一部拡大図である。
上述のように、カバー４をボディ２のカシメ部２ｃでカシメることで、皿バネ５の板部５ｃは、前記カバー４の第２の突設部４ｃの端部の平坦部により前記ダイヤフラム構造部材３の上面に圧接固定される。
皿バネ５がこのように圧接固定されることで、図示するように、その内側バネ部５ｂと板部５ｃでへの字形状のバネが構成され、内側バネ部５ｂの端部がダイヤフラム構造部材３と圧接し、また、外側バネ部５ａの端部とボディ２が圧接してダイヤフラム３ｂとボディ２が電気的に導通してボディアースを形成する。
ここで、前記カバー４の第２の突設部４ｃは、図３に示すように、前記平坦部の内側及び外側がともに断面が曲面状に形成されている。すなわち、平坦部の外側が、前記皿バネ５が組み込まれたときに、その外側バネ部５ａの端部が前記ボディ２の内周に当接することによる外側バネ部５ａの撓み曲面Ａと、前記カバー４の第２の突設部４ｃの外側の曲面Ｂとが略等間隔のほぼ等しい形状を有する曲面となるようにされている。また、第２の突設部４ｃの平坦部の内側も曲面状に形成されている。このように、前記カバー４の第２の突設部４ｃが前記外側バネ部５ａの支点の内側である板部５ｃで圧接し、第２の突設部４ｃの両側が曲面となる構成とすることにより、前記皿バネ５を塑性変形させることがなく、前記外側バネ部５ａ及び前記内側バネ部５ｂと板部５ｃとで形成されるへの字形状のバネ部がともに安定したバネ特性を有するものとすることができるという効果がある。
したがって、内側バネ部５ｂの端部とダイヤフラム構造部材３のアッパーカバー３ａの上面、及び、外側バネ部５ａとボディ２の内周面が、ともに、安定した大きな接触圧で圧接され、ダイヤフラム構造部材とボディの電気的導通を安定したものとすることができる。 FIG. 3 is a partially enlarged view of FIG. 1 showing a state in which the disc spring 5 is incorporated in the body 2.
As described above, by caulking the cover 4 with the caulking portion 2 c of the body 2, the plate portion 5 c of the disc spring 5 has the diaphragm structure due to the flat portion at the end of the second projecting portion 4 c of the cover 4. The upper surface of the member 3 is pressed and fixed.
As shown in the figure, the disc spring 5 is fixed in pressure contact with the inner spring portion 5b and the plate portion 5c to form a hemispherical spring, and the end portion of the inner spring portion 5b is a diaphragm structural member. 3, and the end of the outer spring portion 5 a and the body 2 are in pressure contact, and the diaphragm 3 b and the body 2 are electrically connected to form a body ground.
Here, as shown in FIG. 3, the second projecting portion 4 c of the cover 4 has a curved cross section on the inside and outside of the flat portion. That is, when the disc spring 5 is incorporated outside the flat portion, the curved surface A of the outer spring portion 5a due to the end of the outer spring portion 5a coming into contact with the inner periphery of the body 2, and the The curved surface B on the outer side of the second projecting portion 4c of the cover 4 is a curved surface having substantially the same shape at substantially equal intervals. Moreover, the inside of the flat part of the 2nd protrusion part 4c is also formed in the curved surface shape. In this way, the second projecting portion 4c of the cover 4 is in pressure contact with the plate portion 5c inside the fulcrum of the outer spring portion 5a, and both sides of the second projecting portion 4c are curved. Thus, the disc spring 5 is not plastically deformed, and the U-shaped spring portion formed by the outer spring portion 5a and the inner spring portion 5b and the plate portion 5c has stable spring characteristics. There is an effect that it can be.
Therefore, the end portion of the inner spring portion 5b and the upper surface of the upper cover 3a of the diaphragm structural member 3 and the outer spring portion 5a and the inner peripheral surface of the body 2 are both pressed against each other with a stable large contact pressure. And the electrical continuity of the body can be stabilized.

また、図３に示す３ｅは、前記ダイヤフラム構造部材３のロアカバー３ｃをプレス加工により製造するときに発生する外側外周のバリ（ダレ）を示している。図示するように、本発明においては、この加工ダレ３ｅは、前記ボディ２の収納孔２ｄの底面の周縁部に形成されたバリ収納凹部７に収納されている。
このような構成とすることで、前記ダイヤフラム３ｂを前記アッパーカバー３ａとロアカバー３ｃとで挟持し、外周の溶接部３ｄをレーザー溶接により溶接して前記ダイヤフラム構造部材３を製造したときであっても、前記ロアカバー３ｃの周縁にプレス加工により発生した加工ダレを削り取るなどの加工工程が不要となるため、製造工程がシンプルになり、安価な圧力スイッチを製造することができる効果がある。 Moreover, 3e shown in FIG. 3 has shown the burr | flash of the outer periphery generate | occur | produced when manufacturing the lower cover 3c of the said diaphragm structure member 3 by press work. As shown in the figure, in the present invention, the processing sag 3e is stored in a burr storage recess 7 formed at the peripheral edge of the bottom surface of the storage hole 2d of the body 2.
With this configuration, even when the diaphragm structural member 3 is manufactured by sandwiching the diaphragm 3b between the upper cover 3a and the lower cover 3c and welding the outer welded portion 3d by laser welding. Since a processing step such as scraping off the processing sag generated by press processing on the periphery of the lower cover 3c is not required, the manufacturing process is simplified, and an inexpensive pressure switch can be manufactured.

なお、上述した実施の形態においては、ダイヤフラム自体が接点の一方となり、また、皿バネを使用することによりボディアースを確実なものとする圧力スイッチを例にとって説明したが、本発明は、ダイヤフラムをアッパーカバーとロアカバーで挟持し、外周を溶接することにより一体とされたダイヤフラム構造部材をボディに収納する形態の圧力スイッチであれば、同様に適用することができる。   In the embodiment described above, the diaphragm itself is one of the contacts, and the pressure switch that secures the body ground by using a disc spring has been described as an example. However, the present invention is not limited to the diaphragm. The pressure switch can be applied in the same manner as long as the pressure switch is configured such that the diaphragm structural member integrated between the upper cover and the lower cover is welded by welding the outer periphery.

本発明の圧力スイッチの一実施の形態の構成を示す断面図である。It is sectional drawing which shows the structure of one Embodiment of the pressure switch of this invention. 皿バネの変面図とその断面図である。It is a change figure of a disc spring, and its sectional view. 皿バネを実際にボディに組み込んだ状態を示す一部拡大図である。It is a partially expanded view which shows the state which actually incorporated the disk spring in the body.

符号の説明Explanation of symbols

１：圧力スイッチ、２：ボディ、２ａ：固定部、２ａ１：圧力導入孔、２ｂ：第１の突設部、２ｃ：カシメ部、２ｄ：収納孔、３：ダイヤフラム構造部材、３ａ：アッパーカバー、３ｂ：ダイヤフラム、３ｃ：ロアカバー、３ｄ：溶接部、３ｅ：バリ、４：カバー、４ａ：コネクタ収納部、４ｂ：接点部材収納部、４ｃ：第２の突設部、５：皿バネ、５ａ：外側バネ部、５ｂ：内側バネ部、５ｃ：板部、５ｄ：切欠き部、７：バリ収納凹部、８：ターミナルピン、９：シール部材、１０：第１のシール溝、１１：第２のシール溝、１２：接点バネ固定部、１３：接点バネ、１４：固定接点   1: pressure switch, 2: body, 2a: fixing part, 2a1: pressure introducing hole, 2b: first projecting part, 2c: caulking part, 2d: storage hole, 3: diaphragm structural member, 3a: upper cover, 3b: Diaphragm, 3c: Lower cover, 3d: Welded portion, 3e: Burr, 4: Cover, 4a: Connector housing portion, 4b: Contact member housing portion, 4c: Second projecting portion, 5: Belleville spring, 5a: Outer spring portion, 5b: inner spring portion, 5c: plate portion, 5d: notch portion, 7: burr storage recess, 8: terminal pin, 9: seal member, 10: first seal groove, 11: second Seal groove, 12: contact spring fixing part, 13: contact spring, 14: fixed contact

Claims (2)

ダイヤフラムをアッパーカバーとロアカバーとで挟持して溶接することで一体に形成されたダイヤフラム構造部材と、
その一端が外部のコネクターと結合可能なターミナルピンと一体に形成され、前記ターミナルピンの他端に固定結合した電気的接点部材を収納する絶縁性のカバーと、
前記ダイヤフラム構造部材と前記カバーとを収納する導電性のボディとを少なくとも備えた圧力スイッチであって、
前記導電性のボディは、前記ダイヤフラム構造部材のロアカバーの外周に加工時に形成された加工ダレを収納する凹部を備えたことを特徴とする圧力スイッチ。 A diaphragm structural member formed integrally by sandwiching and welding the diaphragm between the upper cover and the lower cover;
An insulating cover that houses an electrical contact member, one end of which is integrally formed with a terminal pin that can be coupled to an external connector, and is fixedly coupled to the other end of the terminal pin;
A pressure switch comprising at least a conductive body that houses the diaphragm structural member and the cover;
The pressure switch according to claim 1, wherein the conductive body includes a recess that accommodates a processing sag formed during processing on an outer periphery of the lower cover of the diaphragm structural member. 前記ダイヤフラム構造部材はレーザー溶接により一体に形成されたものであることを特徴とする請求項１記載の圧力スイッチ。   2. The pressure switch according to claim 1, wherein the diaphragm structural member is integrally formed by laser welding.
JP2007147790A 2007-06-04 2007-06-04 Pressure switch Pending JP2008300312A (en)

Priority Applications (2)

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JP2007147790A JP2008300312A (en) 2007-06-04 2007-06-04 Pressure switch
CNU2008201120693U CN201278331Y (en) 2007-06-04 2008-05-13 Pressure switch

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016027472A1 (en) * 2014-08-22 2016-02-25 株式会社鷺宮製作所 Pressure sensor
JP2017054779A (en) * 2015-09-11 2017-03-16 株式会社鷺宮製作所 Capacitance detection type pressure switch and pressure sensor

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Publication number Priority date Publication date Assignee Title
JP6231463B2 (en) * 2014-11-07 2017-11-15 株式会社鷺宮製作所 Caulking structure
JP6966490B2 (en) * 2019-01-28 2021-11-17 株式会社鷺宮製作所 pressure switch

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016027472A1 (en) * 2014-08-22 2016-02-25 株式会社鷺宮製作所 Pressure sensor
JPWO2016027472A1 (en) * 2014-08-22 2017-04-27 株式会社鷺宮製作所 pressure switch
JP2017054779A (en) * 2015-09-11 2017-03-16 株式会社鷺宮製作所 Capacitance detection type pressure switch and pressure sensor
US10161820B2 (en) 2015-09-11 2018-12-25 Saginomiya Seisakusho, Inc. Capacitance-detection type pressure switch and pressure sensor

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