JP3651024B2 - Position signal generation switch - Google Patents

Position signal generation switch Download PDF

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JP3651024B2
JP3651024B2 JP17410694A JP17410694A JP3651024B2 JP 3651024 B2 JP3651024 B2 JP 3651024B2 JP 17410694 A JP17410694 A JP 17410694A JP 17410694 A JP17410694 A JP 17410694A JP 3651024 B2 JP3651024 B2 JP 3651024B2
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position signal
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JPH0836946A (en
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徳浩 位田
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Description

【0001】
【産業上の利用分野】
本発明は、シフトレバーの切替操作で、例えばパーキング、リア、ニュートラル、ドライブ、2速、1速という自動変速器のシフトポジションを示すポジション信号を発生するポジション信号発生スイッチに関するものである。
【0002】
【従来の技術】
一般に、自動変速器を備えた自動車では、シフトレバーの切換操作でパーキング、リア、ニュートラル、ドライブ、2速、1速というシフトポジションを示すポジション信号を発生するポジション信号発生スイッチが用いられ、夫々のシフトポジション信号に応じて制御系のマイクロコンピューターに操作指令を与えるようになっている。
【0003】
この種のポジション信号発生スイッチとして、ハウジングをボディとカバーとで構成し、シフトレバーにより駆動される可動板の回動に応じてハウジング内で回動する可動枠を備え、可動板の回動により可動枠に一体に取付けられた可動接点と、ボディ及びカバーに埋設された複数の導電板に一体形成された固定接点とを接触・開離させて、自動変速機のシフトポジションを示すポジション信号を発生させるものが知られている。そして、可動枠のシャフトを可動板に接合する方法としては、可動枠にインサート成形されたシャフトにネジ部を形成し、ナットにより可動板をシャフトに締め付け固定する方法が一般的であった。
【0004】
【発明が解決しようとする課題】
ところが、従来のように可動枠にインサート成形されたシャフトをナットにより可動板に締め付け固定する場合にあっては、組み立て時における可動枠や可動板、ナットの取扱いが面倒であり、しかもシャフトと別部材のナットを必要とするために部品点数が増加し、この結果、組み立て性が低下するという問題がある。しかも、ポジション信号発生スイッチは自動変速器用のものであるから、接点切換位置の誤差が大きいと変速制御自体にも影響が及ぶものであり、非常に精度の高いものが要求されるが、従来のようにナットを用いて可動板を可動枠のシャフトに締結するものにあっては、シフトレバーによる可動板の回動操作の繰り返しによってナットに緩みが生じ易く、このような場合、可動板にぐらつきが発生して接点切換位置に誤差が生じるおそれがあり、また可動板がナットと共にシャフト部から離脱して、操作不能になる事態も予想されるなど、従来の技術ではポジション信号発生スイッチの組み立て精度を向上させるのが困難であった。
【0005】
本発明は、上記従来の課題に鑑みてなされたもので、その目的とするところは、組み立てが容易で、しかも可動枠のシャフト部と可動板との一体接合により、組み立て精度の向上を図ることができるポジション信号発生スイッチを提供するにあり、別の目的とするところは、可動枠のシャフト部と可動板との超音波溶接時においてシャフト部とボディとの接合を確実に防止できると共に、可動板の回動操作時においてはシャフト部とボディとのシャフト摺動部の磨耗を未然に防いで耐久性を向上させることができるポジション信号発生スイッチを提供するにある。
【0006】
【課題を解決するための手段】
上記課題を解決するために、本発明は、ハウジング4がボディ2とカバー3とで構成され、シフトレバー18により駆動される可動板19の回動に応じてハウジング4内で回動する可動枠8を備え、可動板19の回動により可動枠8に一体に取付けられた可動接点7と、ボディ2及びカバー3に埋設された複数の導電板14に一体形成された固定接点25とを接触・開離させて、自動変速機のシフトポジションを示すポジション信号を発生するポジション信号発生スイッチにおいて、可動接点7を有する可動枠8のシャフト部9の一端9aがカバー3を貫通してハウジング4外部にて可動板19のシャフト挿通孔12に超音波溶接Mにより一体接合されると共に、シャフト部9の他端9bがボディ2に形成した凹所10に回動自在に取付けられ、該シャフト部9とボディ2の凹所10との間には、超音波溶接時におけるシャフト部9とボディ2との接合を防止するための接合防止用スペーサ21が介在されていることに特徴がある。
【0008】
また、上記接合防止用スペーサ21はステンレス板21aから成るのが好ましい。
【0009】
【作用】
本発明によれば、可動板19と可動枠8との超音波溶接時において、シャフト部9とボディ2が接合されるのを防止できる。つまり、超音波溶接における加圧と超音波振動がシャフト部9からボディ2に伝わって、シャフト部9とボディ2とが接合されてしまうのを接合防止用スペーサ21によって未然に防止できるので、ボディ2の磨耗を防いで耐久性の向上を図ることができる。
【0010】
【実施例】
以下、本発明の実施例を図面に基づいて説明する。
本実施例のポジション信号発生スイッチ1は、図2乃至図5に示すように、ボディ2とカバー3とからなるハウジング4と、このハウジング4の内部に回動自在に収められる可動体6とで構成されている。
【0011】
ボディ2及びカバー3は共に、合成樹脂により略扇形に形成され、このボディ2とカバー3とを互いに嵌合させることによりハウジング4が構成される。ハウジング4の内部には、可動接点7が設けられた可動枠8と、この可動枠8より突設されたシャフト部9とから成る可動体6が回動自在に収められている。
ボディ2には、後述する可動体6のシャフト部9が回動自在に取付けられる略円形の凹所10が形成されると共に、この凹所10を中心とする略扇形に凹部11が形成されている。また、カバー3には、シャフト部9の一端が貫通する貫通50が形成されると共に、この貫通孔50を中心とする略扇形にボディ2と同様の凹部13が形成されている。これら凹部11,13には複数本の導電板14が埋設されており、各導電板14には固定接点25が一体形成され、この固定接点25が前記凹部11,13から露出している。また、導電板14の一端部はボディ2及びカバー3の外へ突出させてあり、その突出部を出力端子51としてポジション信号が出力するようになっている。図2中、5は出力端子51を囲むコネクタハウジングであり、ハウジング4とは別体に構成されている。
【0012】
前記複数本の導電板14は、自動変速器のシフトポジションに対応して埋設されており、本実施例の場合には、パーキングポジション、リバースポジション、ニュートラルポジション、ドライブポジション、2速ポジション及び1速ポジションの計6つのシフトポジションに対応した導電板14(アース用の導電板を含む)が埋設されている。尚、アース用の導電板14のみがボディ2とカバー3との両方に埋設されており、図6に示すように、アース用の導電板14の端部はボディ2及びカバー3の周部にまで夫々沿設してあり、その端部を嵌合面の方に夫々立ち上げてボディ2及びカバー3から突出させた立ち上げ片14a,14bを夫々形成してあり、これら立ち上げ片14a,14bは湾曲側壁を有する弾接ソケット17により機械的に且つ電気的に接続されている。
【0013】
一方、可動体6は、図1に示すように、可動枠8と、可動枠8にインサート成形されたシャフト部9とからなり、ハウジング4に回動自在に取着してある。つまり、可動枠8のシャフト部9の一端9aはカバー3の貫通孔50より外部へ突出しており、シャフト部9とカバー3との隙間はOリング20によってシールしてある。そして、カバー3から突出するシャフト部9の一端9aはシフトレバー18により駆動される可動板19のシャフト挿通孔12に挿通した状態で、可動板19とシャフト部9との接融面が超音波溶接Mにより一体接合されるようになっている。このように可動板19と一体接合されたシャフト部9の他端9bはボディ2に形成された凹所10に回動自在に取付けられると共に、このシャフト部9とボディ2の凹所10との間には、超音波溶接時における両者2,9の接合を防止するための接合防止用スペーサ21が介挿されている。この接合防止用スペーサ21は、低磨耗係数で且つ高溶融温度特性の材料、例えばステンレス板21aが用いられる。
【0014】
また、前記シャフト部9が突設された可動枠8は、可動板19の回動に応じてハウジング4の凹部11,13(図2、図3)により形成された空間内を回動するものであり、この可動枠8の両側面には、図4に示すように、可動接点7が夫々一体的に取付けられている。この可動接点7はコイルスプリング24によって各々可動枠8の両側面から外方へ弾性付勢されている。尚、可動接点7と固定接点25との導通角は、可動体6の回動中心に対して円弧状に形成され且つ固定接点25より外側に位置する規制リブ26(図7)で規制されている。そして、ボディ2及びカバー3の凹部11,13内に固定接点25の高さよりも高い規制リブ26を固定接点25,25の間に設け、固定接点25,25の間では可動接点7が規制リブ26上に乗り上がることにより、固定接点25との高さ方向における距離を保ち、規制リブ26の幅により可動接点7と固定接点25との導通角を規制してある。
【0015】
さらに、ハウジング4の外周部には図2及び図3に示すように、突出部27が夫々突設されており、この突出部27に基準位置設定時にハウジング4側の指標となる基準設定部28が設けられている。この実施例では突出部27は、ボディ2及びカバー3に夫々突設された突出片29a,29bから成り、ボディ2側の突出片29aの先端部には、図示省略した設定治具の先端部が挿通される貫通孔30を備えた突起部31がカバー3側に突設されている。一方、カバー3側の突出片29bの先端部には、前記突起部31が嵌入される嵌合孔32が設けられており、これにより、ボディ2とカバー3とを組付けてハウジング4を構成すれば、ボディ2側の突出片29aに突設した突起部31と、カバー3側の嵌合孔32とが嵌合し、基準設定部28が形成される。そして、可動板19と、ボディ2及びカバー3の凹部11,13に配設されている各固定接点25との双方の操作基準点を一致させるため、設定治具の一端部をハウジング4の前記貫通孔30に、且つ設定治具の他端部を可動板19の挿通孔23に夫々挿通させることにより、可動板19とハウジング4とを自動的に基準位置(本実施例ではNポジション)で相一致させることができるものである。
【0016】
次に、ポジション信号発生スイッチ1を組み立てるにあたっては、予め可動枠8にシャフト部9をインサート成形により一体成形しておき、この一体成形品をハウジング4内に組み込む。このとき、可動枠8のシャフト部9の一端9aをカバー3の貫通孔50から外部に突出させ、且つシャフト部9の他端9bをボディ2に形成された凹所10に回動自在に取付けると共に、シャフト部9とボディ2の凹所10との間にはステンレス板21aを挿入しておく。その後、ボディ2とカバー3とを互いに嵌合させてハウジング4内に可動枠8が一体に組み込まれた半完成品を得る。最後に、この半完成品におけるハウジング4の外部に突出したシャフト部9に可動板19を接合する。その接合方法は、該シャフト部9の一端9aに可動板19のシャフト挿通孔12を嵌め込んだ状態で、シャフト部9と可動板19とを超音波溶接Mにより一体接合する。
【0017】
このように、ハウジング4完成後の半完成品に対して、最後に可動板19と可動枠8とを超音波溶接Mにより一体接合できるので、組み立て時における半完成品の取扱いが容易であり、従来のように可動枠にナットにより可動板を締め付け固定する場合と比較して、部品点数も少なく、組み立て性を向上させるのが容易となる。しかも、従来のナットによる締め付け固定方法を採用せず、可動枠8と可動板19とを超音波溶着させたことにより、従来のようなシフトレバーによる可動板の回動操作の繰り返しによってナットに緩みが生じて可動板にぐらつきが発生したり、或いは可動板がナットと共に離脱したりするという事態を回避でき、その結果、組み立て精度が向上して、ポジション信号発生スイッチ1の信頼性を高めることができる。
【0018】
また、シャフト部9とボディ2の凹所10とのシャフト摺動部に接合防止用スペーサ21を介在させたから、可動板19と可動枠8との超音波溶接時において、シャフト部9とボディ2が接合されるのを防止できる。つまり、超音波溶接Mは、可動枠8のシャフト部9の一端9aと可動板19との接融面に対して適当な加圧のもとに超音波振動を与えて、該接融面で摩擦による発熱を起こさせるものであるが、このときシャフト部9の他端9bはボディ2の凹所10に回動自在に取付けられているため、接合防止用スペーサ21が存在しない場合には、超音波溶接時における加圧と超音波振動がシャフト部9からボディ2に伝わって、シャフト部9とボディ2とが接合されてしまい、シャフト部9の回動操作ができなくなったり、或いはボディ2が磨耗して耐久性が低下するという問題が生じる。
【0019】
そこで、本発明では、接合防止用スペーサ21をシャフト部9とボディ2の凹所10との間に介在させているので、かかる問題は生じ得ない。殊に接合防止用スペーサ21としてステンレス板21aを用いているので、摩擦係数が小さくて、樹脂に比べて溶融温度も高いステンレス板21aによって、シャフト部9とボディ2との接合を効果的に防止でき且つ可動板19の回動操作時においてはシャフト部9とボディ2との磨耗を未然に防いで耐久性の向上を図ることができ、さらにステンレス板21aを用いたので、可動枠8の摺動性が良好となり、操作性もまた向上するという利点がある。
【0020】
本発明の他の実施例として、図8に示すように、シャフト部9と可動板19との接合を超音波溶着と超音波カシメとの両方で行なうようにしてもよい。他の構成は図1の実施例と同様である。この実施例では、可動枠8のシャフト部9を一端9aが可動板19のシャフト挿通孔12よりも突出する長さとし、シャフト部9と可動板19との接融面を超音波溶接Mにより一体接合する一方で、シャフト部9の一端9aの突出部分Nを超音波カシメによって潰すことにより、可動板19のシャフト部9に対する接合強度をさらに高めることができ、組み立て精度をより一層向上させることができる。
【0021】
尚、上記実施例では、接合防止用スペーサ21としてステンレス板21aを用いたが、これに限定されるものではなく、摩擦係数が小さく、且つ樹脂に比べて溶融温度が高い材質であれば、ステンレス以外の材質であってもよい。
【0022】
【発明の効果】
上述のように、請求項1記載の発明によれば、可動接点を有する可動枠のシャフト部の一端がカバーを貫通してハウジング外部にて可動板のシャフト挿通孔に超音波溶接により一体接合されると共に、シャフト部の他端がボディに形成した凹所に回動自在に取付けられ、該シャフト部とボディの凹所との間には、超音波溶接時におけるシャフト部とボディとの接合を防止するための接合防止用スペーサが介在されているから、ボディとカバーとを互いに嵌合させてハウジング内に可動枠が一体に組み込まれた半完成品を完成させた後に、最後にこの半完成品の可動枠に対して可動板を超音波溶接により一体接合できるので、組み立て時における半完成品の取扱いが容易となり、組み立て精度が向上する効果に加えて、可動板と可動枠との超音波溶接時において、シャフト部とボディが接合されるのを防止できる。つまり、超音波溶接における加圧と超音波振動がシャフト部からボディに伝わって、シャフト部とボディとが接合されてしまうのを接合防止用スペーサによって未然に防止できるので、ボディの磨耗を防いで耐久性の向上を図ることができるという効果を奏する。
【0024】
また、請求項2記載の発明によれば、請求項1記載の接合防止用スペーサがステンレス板から成るから、請求項1の効果に加えて、摩擦係数が小さくて、樹脂に比べて溶融温度も高いステンレス板によって、シャフト部とボディとの接合を効果的に防止できると同時に、可動板の回動操作時においてはシャフト部とボディとの磨耗を未然に防いで耐久性の向上を図ることができ、さらにステンレス板の場合には可動枠の摺動性が良好になるので、操作性もまた向上するという効果を奏する。
【図面の簡単な説明】
【図1】本発明の一実施例の要部側面断面図である。
【図2】同上のボディの平面図である。
【図3】同上のカバーの平面図である。
【図4】同上のボディとカバーとの組み立て後の側面断面図である。
【図5】同上の側面図である。
【図6】同上の要部断面図である。
【図7】同上の規制リブ付近の断面図である。
【図8】(a)(b)は本発明の他の実施例の要部断面図である。
【符号の説明】
2 ボディ
3 カバー
4 ハウジング
7 可動接点
8 可動枠
9 シャフト部
9a 一端
9b 他端
10 凹所
12 シャフト挿通孔
14 導電板
18 シフトレバー
19 可動板
21 接合防止用スペーサ
21a ステンレス板
25 固定接点
[0001]
[Industrial application fields]
The present invention relates to a position signal generation switch that generates a position signal indicating a shift position of an automatic transmission such as parking, rear, neutral, drive, second speed, and first speed by a shift lever switching operation.
[0002]
[Prior art]
In general, an automobile equipped with an automatic transmission uses a position signal generation switch that generates a position signal indicating a shift position of parking, rear, neutral, drive, second speed, and first speed by a shift lever switching operation. An operation command is given to the control microcomputer in response to the shift position signal.
[0003]
As this type of position signal generation switch, the housing is composed of a body and a cover, and includes a movable frame that rotates in the housing in accordance with the rotation of the movable plate driven by the shift lever. A position signal indicating the shift position of the automatic transmission is obtained by contacting / separating a movable contact integrally attached to the movable frame and a fixed contact integrally formed on a plurality of conductive plates embedded in the body and cover. What is generated is known. As a method for joining the shaft of the movable frame to the movable plate, a method of forming a screw portion on the shaft insert-molded on the movable frame and fastening the movable plate to the shaft with a nut is generally used.
[0004]
[Problems to be solved by the invention]
However, when a shaft insert-molded in a movable frame is fastened and fixed to a movable plate with a nut as in the prior art, handling of the movable frame, movable plate, and nut during assembly is cumbersome and separate from the shaft. Since the nut of a member is required, the number of parts increases and as a result, there exists a problem that an assembly property falls. Moreover, since the position signal generation switch is for an automatic transmission, if the error of the contact switching position is large, the shift control itself is also affected, and a highly accurate switch is required. In the case where the movable plate is fastened to the shaft of the movable frame using a nut as described above, the nut is easily loosened by repeated rotation of the movable plate by the shift lever. In such a case, the movable plate is wobbled. May cause errors in the contact switching position, and it may be possible that the movable plate will come off the shaft together with the nut and become inoperable. It was difficult to improve.
[0005]
The present invention has been made in view of the above-described conventional problems. The object of the present invention is to facilitate assembly and to improve the assembly accuracy by integrally joining the shaft portion of the movable frame and the movable plate. A position signal generation switch that can perform the operation, and another object is to reliably prevent the joint between the shaft portion and the body during ultrasonic welding between the shaft portion of the movable frame and the movable plate, and to move the movable frame. An object of the present invention is to provide a position signal generating switch capable of preventing the wear of the shaft sliding portion between the shaft portion and the body and improving the durability when the plate is rotated.
[0006]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a movable frame in which the housing 4 is composed of the body 2 and the cover 3 and rotates within the housing 4 in accordance with the rotation of the movable plate 19 driven by the shift lever 18. 8, the movable contact 7 integrally attached to the movable frame 8 by the rotation of the movable plate 19, and the fixed contact 25 integrally formed on the plurality of conductive plates 14 embedded in the body 2 and the cover 3 are brought into contact with each other. In a position signal generating switch that generates a position signal indicating a shift position of the automatic transmission by opening the shaft, one end 9a of the shaft portion 9 of the movable frame 8 having the movable contact 7 passes through the cover 3 and the outside of the housing 4 And the other end 9b of the shaft portion 9 is rotatably attached to the recess 10 formed in the body 2 while being integrally joined to the shaft insertion hole 12 of the movable plate 19 by ultrasonic welding M. Between the recess 10 of the shaft portion 9 and the body 2, in particular wherein the anti-bonding spacers 21 for preventing the junction between the shaft portion 9 and the body 2 at the time of ultrasonic welding is interposed There is.
[0008]
The joining prevention spacer 21 is preferably made of a stainless steel plate 21a.
[0009]
[Action]
According to the present invention, it is possible to prevent the shaft portion 9 and the body 2 from being joined at the time of ultrasonic welding between the movable plate 19 and the movable frame 8. That is, since the pressurization and ultrasonic vibration in the ultrasonic welding are transmitted from the shaft portion 9 to the body 2 and the shaft portion 9 and the body 2 are joined to each other by the joining prevention spacer 21, 2 can be prevented and the durability can be improved.
[0010]
【Example】
Embodiments of the present invention will be described below with reference to the drawings.
As shown in FIGS. 2 to 5, the position signal generation switch 1 of this embodiment includes a housing 4 composed of a body 2 and a cover 3 and a movable body 6 that is rotatably housed inside the housing 4. It is configured.
[0011]
Both the body 2 and the cover 3 are formed in a substantially sector shape from a synthetic resin, and the housing 4 is configured by fitting the body 2 and the cover 3 to each other. A movable body 6 including a movable frame 8 provided with a movable contact 7 and a shaft portion 9 protruding from the movable frame 8 is rotatably housed inside the housing 4.
The body 2 is formed with a substantially circular recess 10 to which a shaft 9 of the movable body 6 described later is rotatably attached, and a recess 11 is formed in a substantially sector shape with the recess 10 as a center. Yes. Further, the cover 3 is formed with a through-hole 50 through which one end of the shaft portion 9 passes, and a concave portion 13 similar to the body 2 is formed in a substantially sector shape with the through-hole 50 as the center. A plurality of conductive plates 14 are embedded in the recesses 11 and 13, and a fixed contact 25 is integrally formed on each conductive plate 14, and the fixed contact 25 is exposed from the recesses 11 and 13. One end portion of the conductive plate 14 protrudes outside the body 2 and the cover 3, and a position signal is output using the protruding portion as an output terminal 51. In FIG. 2, reference numeral 5 denotes a connector housing that surrounds the output terminal 51, and is configured separately from the housing 4.
[0012]
The plurality of conductive plates 14 are embedded corresponding to the shift position of the automatic transmission. In the case of this embodiment, the parking position, the reverse position, the neutral position, the drive position, the second speed position, and the first speed. Conductive plates 14 (including a ground conductive plate) corresponding to a total of six shift positions are embedded. Note that only the grounding conductive plate 14 is embedded in both the body 2 and the cover 3, and as shown in FIG. 6, the end of the grounding conductive plate 14 is located on the periphery of the body 2 and the cover 3. The rising portions 14a and 14b are formed by projecting the end portions thereof toward the fitting surfaces and projecting from the body 2 and the cover 3, respectively. 14b is mechanically and electrically connected by a ball contact socket 17 having a curved side wall.
[0013]
On the other hand, as shown in FIG. 1, the movable body 6 includes a movable frame 8 and a shaft portion 9 that is insert-molded on the movable frame 8, and is rotatably attached to the housing 4. That is, one end 9 a of the shaft portion 9 of the movable frame 8 protrudes outside from the through hole 50 of the cover 3, and the gap between the shaft portion 9 and the cover 3 is sealed by the O-ring 20. The one end 9a of the shaft portion 9 protruding from the cover 3 is inserted into the shaft insertion hole 12 of the movable plate 19 driven by the shift lever 18, and the welding surface between the movable plate 19 and the shaft portion 9 is ultrasonic. They are integrally joined by welding M. The other end 9 b of the shaft portion 9 integrally joined to the movable plate 19 is rotatably attached to a recess 10 formed in the body 2, and the shaft portion 9 and the recess 10 of the body 2 are connected to each other. In the meantime, a joining prevention spacer 21 is inserted for preventing joining of the two 2 and 9 at the time of ultrasonic welding. The bonding preventing spacer 21 is made of a material having a low wear coefficient and a high melting temperature, such as a stainless steel plate 21a.
[0014]
Further, the movable frame 8 on which the shaft portion 9 is protruded rotates in the space formed by the recesses 11 and 13 (FIGS. 2 and 3) of the housing 4 according to the rotation of the movable plate 19. As shown in FIG. 4, the movable contacts 7 are integrally attached to both side surfaces of the movable frame 8. The movable contacts 7 are elastically urged outward from both side surfaces of the movable frame 8 by coil springs 24, respectively. The conduction angle between the movable contact 7 and the fixed contact 25 is regulated by a regulation rib 26 (FIG. 7) that is formed in an arc shape with respect to the rotation center of the movable body 6 and is located outside the fixed contact 25. Yes. In the recesses 11 and 13 of the body 2 and the cover 3, a restriction rib 26 higher than the height of the fixed contact 25 is provided between the fixed contacts 25 and 25, and the movable contact 7 is between the fixed contacts 25 and 25. 26, the distance in the height direction from the fixed contact 25 is maintained, and the conduction angle between the movable contact 7 and the fixed contact 25 is regulated by the width of the regulating rib 26.
[0015]
Further, as shown in FIGS. 2 and 3, projecting portions 27 are respectively provided on the outer peripheral portion of the housing 4, and a reference setting portion 28 serving as an index on the housing 4 side when the reference position is set on the projecting portion 27. Is provided. In this embodiment, the projecting portion 27 is composed of projecting pieces 29 a and 29 b projecting from the body 2 and the cover 3, respectively, and the tip of the projecting piece 29 a on the body 2 side is disposed at the tip of a setting jig (not shown). A protrusion 31 having a through hole 30 through which is inserted is protruded on the cover 3 side. On the other hand, a fitting hole 32 into which the protruding portion 31 is fitted is provided at the tip of the protruding piece 29b on the cover 3 side, whereby the body 4 and the cover 3 are assembled to constitute the housing 4. In this way, the protrusion 31 projecting from the protruding piece 29a on the body 2 side and the fitting hole 32 on the cover 3 side are fitted together to form the reference setting portion 28. Then, in order to match the operation reference points of both the movable plate 19 and the fixed contacts 25 disposed in the concave portions 11 and 13 of the body 2 and the cover 3, one end of the setting jig is connected to the housing 4. By inserting the other end of the setting jig into the through hole 30 and the insertion hole 23 of the movable plate 19, the movable plate 19 and the housing 4 are automatically set at the reference position (N position in this embodiment). It can be matched.
[0016]
Next, when assembling the position signal generating switch 1, the shaft portion 9 is integrally formed with the movable frame 8 by insert molding in advance, and the integrally molded product is assembled into the housing 4. At this time, one end 9a of the shaft portion 9 of the movable frame 8 is protruded outside from the through hole 50 of the cover 3, and the other end 9b of the shaft portion 9 is rotatably attached to the recess 10 formed in the body 2. At the same time, a stainless steel plate 21 a is inserted between the shaft portion 9 and the recess 10 of the body 2. Thereafter, the body 2 and the cover 3 are fitted to each other to obtain a semi-finished product in which the movable frame 8 is integrally incorporated in the housing 4. Finally, the movable plate 19 is joined to the shaft portion 9 protruding outside the housing 4 in this semi-finished product. In the joining method, the shaft portion 9 and the movable plate 19 are integrally joined by ultrasonic welding M in a state where the shaft insertion hole 12 of the movable plate 19 is fitted into the one end 9 a of the shaft portion 9.
[0017]
Thus, since the movable plate 19 and the movable frame 8 can be integrally joined to the semi-finished product after completion of the housing 4 by ultrasonic welding M, handling of the semi-finished product at the time of assembly is easy. Compared to the conventional case where the movable plate is fastened and fixed to the movable frame with a nut, the number of parts is small, and the ease of assembly is improved. In addition, by adopting ultrasonic welding between the movable frame 8 and the movable plate 19 without adopting the conventional tightening and fixing method using the nut, the nut is loosened by repeated rotation of the movable plate by the conventional shift lever. This can avoid the occurrence of wobbling of the movable plate or the movable plate being detached together with the nut. As a result, the assembly accuracy is improved and the reliability of the position signal generating switch 1 is improved. it can.
[0018]
Further, since the joint prevention spacer 21 is interposed in the shaft sliding portion between the shaft portion 9 and the recess 10 of the body 2, the shaft portion 9 and the body 2 are subjected to ultrasonic welding between the movable plate 19 and the movable frame 8. Can be prevented from being joined. That is, ultrasonic welding M applies ultrasonic vibration to the welding surface between the one end 9a of the shaft portion 9 of the movable frame 8 and the movable plate 19 under an appropriate pressure, and Although heat is generated due to friction, the other end 9b of the shaft portion 9 is pivotally attached to the recess 10 of the body 2 at this time. Pressurization and ultrasonic vibration during ultrasonic welding are transmitted from the shaft portion 9 to the body 2, and the shaft portion 9 and the body 2 are joined, and the shaft portion 9 cannot be rotated, or the body 2. Wears and the durability is lowered.
[0019]
Therefore, in the present invention, since the bonding preventing spacer 21 is interposed between the shaft portion 9 and the recess 10 of the body 2, such a problem cannot occur. In particular, since the stainless steel plate 21a is used as the joining prevention spacer 21, the stainless steel plate 21a having a small friction coefficient and a melting temperature higher than that of the resin effectively prevents the shaft portion 9 and the body 2 from being joined. In addition, when the movable plate 19 is rotated, wear of the shaft portion 9 and the body 2 can be prevented and durability can be improved. Further, since the stainless plate 21a is used, the sliding of the movable frame 8 can be performed. There is an advantage that the mobility becomes good and the operability is also improved.
[0020]
As another embodiment of the present invention, as shown in FIG. 8, the shaft portion 9 and the movable plate 19 may be joined by both ultrasonic welding and ultrasonic caulking. Other configurations are the same as those of the embodiment of FIG. In this embodiment, the shaft portion 9 of the movable frame 8 has such a length that one end 9 a protrudes from the shaft insertion hole 12 of the movable plate 19, and the welding surface of the shaft portion 9 and the movable plate 19 is integrated by ultrasonic welding M. On the other hand, by crushing the protruding portion N of the one end 9a of the shaft portion 9 with ultrasonic caulking, the joining strength of the movable plate 19 to the shaft portion 9 can be further increased, and the assembly accuracy can be further improved. it can.
[0021]
In the above embodiment, the stainless steel plate 21a is used as the bonding preventing spacer 21. However, the present invention is not limited to this, and any stainless steel can be used as long as it has a low coefficient of friction and a higher melting temperature than the resin. Other materials may be used.
[0022]
【The invention's effect】
As described above, according to the first aspect of the present invention, one end of the shaft portion of the movable frame having the movable contact passes through the cover and is integrally joined to the shaft insertion hole of the movable plate by ultrasonic welding outside the housing. In addition, the other end of the shaft portion is rotatably attached to a recess formed in the body, and the shaft portion and the body are joined between the shaft portion and the body recess during ultrasonic welding. Since there is an anti-joining spacer to prevent it, the body and cover are fitted together to complete the semi-finished product with the movable frame integrated into the housing, and finally this semi-finished product since can be integrally joined to the movable plate by ultrasonic welding to the movable frame of the goods, Ri Do facilitates handling of the semifinished product during assembly, in addition to the effect of improving the assembling accuracy, the movable plate and the movable frame Super sound During welding, thereby preventing the shaft portion and the body are joined. In other words, pressurization and ultrasonic vibration in ultrasonic welding are transmitted from the shaft part to the body, and the shaft part and the body can be prevented from being joined together by the joining prevention spacer, thus preventing wear of the body. There is an effect that durability can be improved .
[0024]
According to the invention described in claim 2 , since the joining prevention spacer described in claim 1 is made of a stainless steel plate, in addition to the effect of claim 1 , the friction coefficient is small and the melting temperature is lower than that of the resin. A high stainless steel plate can effectively prevent the shaft and body from being joined together, while at the same time rotating the movable plate, it can prevent wear of the shaft and the body and improve durability. Further, in the case of a stainless steel plate, the slidability of the movable frame is improved, and the operability is also improved.
[Brief description of the drawings]
FIG. 1 is a side sectional view of an essential part of an embodiment of the present invention.
FIG. 2 is a plan view of the body.
FIG. 3 is a plan view of the cover.
FIG. 4 is a side sectional view after assembling the body and the cover.
FIG. 5 is a side view of the above.
FIG. 6 is a cross-sectional view of the relevant part.
FIG. 7 is a cross-sectional view of the vicinity of the restriction rib.
FIGS. 8A and 8B are cross-sectional views of main parts of another embodiment of the present invention.
[Explanation of symbols]
2 Body 3 Cover 4 Housing 7 Movable contact 8 Movable frame 9 Shaft portion 9a One end 9b Other end 10 Recess 12 Shaft insertion hole 14 Conductive plate 18 Shift lever 19 Movable plate 21 Joining prevention spacer 21a Stainless steel plate 25 Fixed contact

Claims (2)

ハウジングがボディとカバーとで構成され、シフトレバーにより駆動される可動板の回動に応じてハウジング内で回動する可動枠を備え、可動板の回動により可動枠に一体に取付けられた可動接点と、ボディ及びカバーに埋設された複数の導電板に一体形成された固定接点とを接触・開離させて、自動変速機のシフトポジションを示すポジション信号を発生するポジション信号発生スイッチにおいて、可動接点を有する可動枠のシャフト部の一端がカバーを貫通してハウジング外部にて可動板のシャフト挿通孔に超音波溶接により一体接合されると共に、シャフト部の他端がボディに形成した凹所に回動自在に取付けられ、該シャフト部とボディの凹所との間には、超音波溶接時におけるシャフト部とボディとの接合を防止するための接合防止用スペーサが介在されていることを特徴とするポジション信号発生スイッチ。The housing is composed of a body and a cover, and includes a movable frame that rotates in the housing in response to the rotation of the movable plate driven by the shift lever, and the movable plate is integrally attached to the movable frame by the rotation of the movable plate. A position signal generating switch that generates a position signal that indicates the shift position of an automatic transmission by bringing the contact and a fixed contact that is integrally formed with a plurality of conductive plates embedded in the body and cover into contact with each other. One end of the shaft portion of the movable frame having a contact passes through the cover and is integrally joined to the shaft insertion hole of the movable plate outside the housing by ultrasonic welding, and the other end of the shaft portion is formed in a recess formed in the body. It is pivotally attached, and between the shaft part and the body recess, a joint prevention for preventing the joint between the shaft part and the body during ultrasonic welding. Position signal generating switch for use spacer is characterized in that it is interposed. 接合防止用スペーサはステンレス板から成ることを特徴とする請求項1記載のポジション信号発生スイッチ。 Position signal generating switch of claim 1, wherein the anti-bonding spacer is characterized in that it consists of a stainless steel plate.
JP17410694A 1994-07-26 1994-07-26 Position signal generation switch Expired - Lifetime JP3651024B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP17410694A JP3651024B2 (en) 1994-07-26 1994-07-26 Position signal generation switch

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17410694A JP3651024B2 (en) 1994-07-26 1994-07-26 Position signal generation switch

Publications (2)

Publication Number Publication Date
JPH0836946A JPH0836946A (en) 1996-02-06
JP3651024B2 true JP3651024B2 (en) 2005-05-25

Family

ID=15972759

Family Applications (1)

Application Number Title Priority Date Filing Date
JP17410694A Expired - Lifetime JP3651024B2 (en) 1994-07-26 1994-07-26 Position signal generation switch

Country Status (1)

Country Link
JP (1) JP3651024B2 (en)

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