JP2656693B2 - Magnetic rotation sensor - Google Patents
Magnetic rotation sensorInfo
- Publication number
- JP2656693B2 JP2656693B2 JP7654492A JP7654492A JP2656693B2 JP 2656693 B2 JP2656693 B2 JP 2656693B2 JP 7654492 A JP7654492 A JP 7654492A JP 7654492 A JP7654492 A JP 7654492A JP 2656693 B2 JP2656693 B2 JP 2656693B2
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- coil
- wire
- lead
- lead terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、例えば自動車エンジン
の回転またはクランク角等を検出する場合に用いる磁気
式回転センサに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a magnetic rotation sensor used for detecting the rotation or crank angle of an automobile engine, for example.
【０００２】[0002]
【従来の技術】従来より磁気式回転センサとして、外周
に突起や歯形等を形成したシグナルディスクと、コア，
マグネット，ヨーク，電磁ピックアップコイル等を有す
るヘッドとよりなる磁気式回転センサが知られている。2. Description of the Related Art Conventionally, as a magnetic rotation sensor, a signal disk having projections and teeth formed on its outer periphery, a core,
2. Description of the Related Art A magnetic rotation sensor including a head having a magnet, a yoke, an electromagnetic pickup coil, and the like is known.
【０００３】この種の磁気式回転センサのうち、ヘッド
は、コア，マグネット，ヨークを合成樹脂成形体と一体
化すると共に、ボビンに電磁ピックアップ用のコイルを
巻装し、また、コイル全体をテーピングにより覆った状
態で、これらの構成部材をＳＵＳ等の金属保護キャップ
により覆う方式のものが一般的であった。In this type of magnetic rotation sensor, the head has a core, a magnet, and a yoke integrated with a synthetic resin molded body, a coil for an electromagnetic pickup is wound around a bobbin, and the entire coil is taped. In general, a method of covering these components with a metal protective cap such as SUS in a state of being covered with a metal cover is known.
【０００４】また、最近では、上記のテーピング工程を
省略して作業効率の向上を図ることが望まれ、これに応
えるものとして、キャップとヘッド構成体との間にエ
ポキシ樹脂を充填する方式や（例えば実開昭６０−５３
０６０号公報）、さらに自動化を促進させるものとし
て、図７に示すようにキャップに代わりヘッドの外装を
エポキシ樹脂モールド成形体により構成するものが提案
されている。Recently, it has been desired to improve the working efficiency by omitting the taping step. In order to meet this demand, a method of filling an epoxy resin between a cap and a head structure has been proposed. For example, 60-53
In order to further promote automation, there has been proposed a configuration in which an exterior of a head is formed of an epoxy resin molded body instead of a cap as shown in FIG.
【０００５】なお、図７の磁気式回転センサは、図１の
本発明品を完成する前の試行過程で得られた試作品で、
図７のうち、（ａ）はその一部を断面して示す説明図、
（ｂ）は（ａ）をコイル７を省略して表したＢ−Ｂ線矢
視図である。The magnetic rotation sensor shown in FIG. 7 is a prototype obtained in a trial process before completing the product of the present invention shown in FIG.
7, (a) is an explanatory view showing a part of the cross section,
(B) is an BB line arrow view showing (a) with the coil 7 omitted.
【０００６】図７において、磁気回路要素となるコア
１，マグネット２，ヨーク３，リード端子４ａ，４ｂ及
び取付用金具５が合成樹脂成形体６と一体化してある。In FIG. 7, a core 1, a magnet 2, a yoke 3, lead terminals 4a, 4b, and a mounting bracket 5, which are magnetic circuit elements, are integrated with a synthetic resin molded body 6.
【０００７】合成樹脂成形体６は、例えばＰＢＴ（ポリ
ブチレンテレフタレート）、ナイロン等でボビン部６
ａ，中間部（胴体部）６ｂ，コネクタ部６ｃを一体成形
してなる。取付用金具５は、中間部６ｂの一部を突出さ
せた部分６ｂ´（図２参照）に設けてある。コア１及び
マグネット２は、コア１の一部を突出させた状態でボビ
ン６ａに埋設され、ヨーク３は中間部６ｂに埋設してあ
る。コア１の突出端はシグナルロータ２０に対向する。The synthetic resin molded body 6 is made of, for example, PBT (polybutylene terephthalate), nylon, or the like.
a, an intermediate portion (body portion) 6b, and a connector portion 6c are integrally formed. The mounting bracket 5 is provided at a portion 6b '(see FIG. 2) where a part of the intermediate portion 6b protrudes. The core 1 and the magnet 2 are buried in the bobbin 6a with a part of the core 1 protruding, and the yoke 3 is buried in the intermediate portion 6b. The protruding end of the core 1 faces the signal rotor 20.
【０００８】リード端子４ａ，４ｂはその一部が合成樹
脂体６に埋設されて、コネクタピン８と接続してある。The lead terminals 4 a and 4 b are partially embedded in the synthetic resin body 6 and connected to the connector pins 8.
【０００９】電磁ピックアップ用のコイル７はボビン６
ａに巻装され、その巻始め引出線７ａがボビン６ａ一端
外周縁（つば部６ｅ外周縁）に設けた突起６ｄに巻き付
けられつつリード端子４ａと接続（巻き付け及び半田付
けによる接続）され、巻終り引出線７ｂも同様にもう一
方の突起６ｄに巻き付けられつつリード端子４ｂと接続
してある。The coil 7 for the electromagnetic pickup is a bobbin 6
a, the winding start lead wire 7a is connected to the lead terminal 4a (connected by winding and soldering) while being wound around a projection 6d provided on the outer peripheral edge of one end of the bobbin 6a (the outer peripheral edge of the flange portion 6e). Similarly, the end lead wire 7b is connected to the lead terminal 4b while being wound around the other protrusion 6d.
【００１０】エポキシ樹脂によるモールド成形体９は、
コイル７全体及び合成樹脂体６のうち引出線７ａ，７
ｂ，リード端子４ａ，４ｂのある箇所を覆って外装モー
ルドとしてある。モールド成形体９をエポキシ樹脂とし
たのは、線膨張係数の方向性がないことと、コイル線の
線膨張係数に近似させることができるので、コイルの断
線を防ぐことができるためである。The molded body 9 made of epoxy resin is
The lead wires 7a, 7a of the entire coil 7 and the synthetic resin body 6
b, an exterior mold is formed to cover a portion of the lead terminals 4a and 4b. The reason why the molded body 9 is made of epoxy resin is that there is no directionality of the coefficient of linear expansion and the coefficient of linear expansion can be approximated to the coefficient of linear expansion of the coil wire, so that disconnection of the coil can be prevented.
【００１１】また、合成樹脂成形体６として、ＰＢＴや
ナイロン等を用いるのは成形の容易及び低コスト化に応
えるためである。The reason why PBT, nylon, or the like is used as the synthetic resin molded body 6 is to respond to easy molding and cost reduction.
【００１２】[0012]
【発明が解決しようとする課題】上記従来のうち、エポ
キシ樹脂で電磁ピックアップ用のコイルを覆う方式は、
製造の合理化や自動化を図り得る反面、次のような改善
すべき点があった。Among the above conventional methods, a method of covering a coil for an electromagnetic pickup with an epoxy resin is as follows.
While the rationalization and automation of production can be achieved, there are the following points to be improved.
【００１３】例えば、上記のの方式では、コイルの引
出線をボビンつば部に掛けて引出したり、引出線を長く
引出してリード端子と接続するため、ボビン等の合成樹
脂成形体の熱膨張収縮の繰り返しで断線の発生率が高く
なる問題があった。For example, in the above-mentioned method, the lead wire of the coil is hung on the bobbin flange, and the lead wire is drawn out long and connected to the lead terminal. There has been a problem that the occurrence rate of disconnection is increased by repetition.
【００１４】また、の方式でも同様の問題が生じる。
また、断線防止のためコイルの引出線を緩ませても、エ
ポキシ樹脂のモールド成形体９の成形時にその加圧力が
引出線巻き付け部（突起）６ｄに加わると、コイル引出
線７ａ，７ｂがφ０．０７mm程度であるので、この巻き
付け部のエッジから剪断力を受けて断線が生じる率が高
かった。A similar problem also occurs in the above method.
Even if the lead wire of the coil is loosened to prevent disconnection, if the pressing force is applied to the lead wire winding portion (projection) 6d during molding of the epoxy resin molded body 9, the coil lead wires 7a and 7b become φ0. Since the diameter was about 0.07 mm, the rate of disconnection caused by shearing force from the edge of the wound portion was high.
【００１５】本発明は以上の点に鑑みてなされ、その目
的は、電磁ピックアップコイルやその引出線等をエポキ
シ樹脂のモールド成形体（外装モールド）で覆う方式の
磁気式回転センサの断線防止を図ることにある。The present invention has been made in view of the above points, and has as its object to prevent disconnection of a magnetic rotation sensor of a type in which an electromagnetic pickup coil and its lead wires are covered with a molded body (exterior mold) of epoxy resin. It is in.
【００１６】[0016]
【課題を解決するための手段】本発明は、上記課題を達
成するために、基本的には次のような課題解決手段を提
案する。The present invention basically proposes the following means for solving the above-mentioned problems.
【００１７】一つは、コア，マグネット等の磁気回路要
素及びリード端子が、ボビンを有する合成樹脂成形体と
一体化され、前記ボビンに電磁ピックアップ用のコイル
が巻装され、前記リード端子は、（１）ボビン一端の前
記コイルの巻始め，巻終り位置と微小距離をおいて前記
合成樹脂成形体の外周に配置され、この微小距離にて前
記リード端子と前記コイルとが引出線（コイルの巻始め
引出線，巻終り引出線）を介して接続されると共に、
（２）前記引出線はそれぞれ前記ボビン一端の外周縁に
非接触の状態でリード端子側に案内されるか或いはボビ
ン一端外周にアールを設けて該アールに沿ってリード端
子側に案内される引出し構造とし、且つ少なくとも前記
コイルがエポキシ樹脂のモールド成形体により覆われて
成る（これを第１の課題解決手段とする）。One is that a magnetic circuit element such as a core and a magnet and a lead terminal are integrated with a synthetic resin molded body having a bobbin, and a coil for an electromagnetic pickup is wound around the bobbin. (1) The lead terminal and the coil are arranged on the outer periphery of the synthetic resin molded body at a small distance from the winding start and end positions of the coil at one end of the bobbin, and the lead wire is connected to the lead wire (coil of the coil) at the small distance. Winding start lead wire, winding end lead wire)
(2) Each of the lead wires is guided to the lead terminal side without contacting the outer peripheral edge of the one end of the bobbin, or a lead is provided along the outer periphery of one end of the bobbin and guided to the lead terminal side along the radius. And a structure in which at least the coil is covered with a molded body of epoxy resin (this is referred to as a first means for solving the problem).
【００１８】もう一つは、前記リード端子とコイル引出
線を直接接続せずに、ワイヤを介して接続する方式を提
案する。The other proposes a system in which the lead terminal and the coil lead wire are not directly connected but are connected via a wire.
【００１９】すなわち、前記同様のリード端子にワイヤ
が半田付けされ、このワイヤは前記合成樹脂体の外周に
這う状態で前記ボビン一端の前記コイルの巻始め，巻終
り位置と微小距離をおいて配置され、この微小距離にて
前記ワイヤと前記コイルとが引出線（コイルの巻始め引
出線，巻終り引出線）を介して接続されると共に、前記
引出線はそれぞれ前記ボビン一端の外周縁に非接触の状
態でワイヤ側に案内されるか或いはボビン一端外周にア
ールを設けて該アールに沿ってワイヤ側に案内される引
出し構造とした（これを第２の課題解決手段とする）。That is, a wire is soldered to the same lead terminal as described above, and the wire is disposed at a small distance from the winding start and end positions of the coil at one end of the bobbin in a state of creeping around the outer periphery of the synthetic resin body. At this minute distance, the wire and the coil are connected via a lead wire (lead wire for starting and ending the winding of the coil), and the lead wire is connected to the outer peripheral edge of one end of the bobbin. A drawer structure is provided which is guided to the wire side in a contact state or provided with a radius at one end of the bobbin and guided to the wire side along the radius (this is referred to as a second problem solving means).
【００２０】[0020]
【作用】第１の課題解決手段の作用…（１）の構成要素
により、リード端子とボビン一端との間のコイル引出線
の長さを十分に短縮し（例えば２ｍｍ以内）、その長さ
に相当に合成樹脂体の距離での熱膨張収縮も小さくな
る。加えて、（２）の要素により、コイル引出線がボビ
ン一端のエッジにあたるといった事態をなくし、また、
図７のような引出線巻き付け箇所（突起６ｄ）のような
ものが省いてあるので、これらの相乗作用により磁気セ
ンサの製造過程や経時的な引出線の断線防止が達成され
る。The function of the first means for solving the problem is as follows: the length of the coil lead wire between the lead terminal and one end of the bobbin is sufficiently reduced (for example, within 2 mm) by the components of (1), The thermal expansion / contraction at the distance of the synthetic resin body is considerably reduced. In addition, the element (2) eliminates the situation where the coil lead wire hits the edge of one end of the bobbin.
Since the parts such as the lead wire wrapping portions (projections 6d) as shown in FIG. 7 are omitted, the synergistic action of these leads to the prevention of disconnection of the lead wires during the manufacturing process of the magnetic sensor and with time.
【００２１】第２の課題解決手段の作用…第１の課題解
決手段の（１）（２）の構成要素による作用をワイヤに
より達成され（換言すれば、ワイヤがリード端子の延長
部とみなすことができ）、これにより、第１の課題解決
手段と同様の作用がなされる。Action of the second problem-solving means: The action of the components (1) and (2) of the first problem-solving means is achieved by the wire (in other words, the wire is regarded as an extension of the lead terminal). Thus, the same operation as the first problem solving means is performed.
【００２２】[0022]
【実施例】本発明の実施例を図面により説明する。BRIEF DESCRIPTION OF THE DRAWINGS FIG.
【００２３】図１は本発明の第１実施例に係る説明図
で、その（ａ）が一部を断面して表す全体構成図、
（ｂ）が（ａ）のＡ−Ａ線矢視図、（ｃ）が本発明を具
体化した要部断面図である。なお、図中、図７に用いる
符号と同一のものは、同一或いは共通する要素である。FIG. 1 is an explanatory view according to a first embodiment of the present invention, in which FIG.
FIG. 2B is a sectional view taken along line AA of FIG. 2A, and FIG. 2C is a sectional view of a main part of the present invention. In the drawing, the same reference numerals as those used in FIG. 7 indicate the same or common elements.
【００２４】本実施例における磁気式回転センサのヘッ
ドも、合成樹脂成形体６は、ボビン６ａ，中間部６ｂ，
コネクタ部６ｃより成り、この合成樹脂成形体６とコア
１，マグネット２，ヨーク３，リード端子４ａ，４ｂ等
は一体化してある。In the head of the magnetic rotation sensor according to this embodiment, the synthetic resin molded body 6 also includes a bobbin 6a, an intermediate portion 6b,
The synthetic resin molded body 6 is integrated with the core 1, magnet 2, yoke 3, lead terminals 4a, 4b, and the like.
【００２５】ボビン６ａの一端６ａ´側のつば部６ｅに
は、その外周縁のうちコイル７の巻始め，巻終りの最寄
りの位置に径方向の凹部６ｆが設けてあり、リード端子
４ａ，４ｂは、その一端がこの凹部６ｆに接近して中間
部６ｂの外周に配設してある。The flange 6e on one end 6a 'side of the bobbin 6a is provided with a radial recess 6f at the outer peripheral edge of the bobbin 6a at a position closest to the beginning and end of winding of the coil 7, and the lead terminals 4a and 4b are provided. Is disposed on the outer periphery of the intermediate portion 6b with one end thereof approaching the concave portion 6f.
【００２６】ボビン一端６ａ´は、その内壁に図１
（ｂ），図３に示すように、コイルの巻始め位置からリ
ード端子４ａ側の凹部６ｆにかけて切り込み溝１２が形
成してあり、図１（ｃ）に示すように溝１２及び凹部６
ｆを通してコイル７の巻始め引出線７ａが案内され、巻
始め引出線７ａがリード端子４ａ一端の立ち上げ部に巻
き付けられ半田１０付けされている。このようにして、
巻始め引出線７ａはボビン一端６ａ´外周縁（つば部外
周縁）に非接触状態で引出されてリード端子４ａと接続
される。The one end 6a 'of the bobbin is attached to its inner wall as shown in FIG.
(B), as shown in FIG. 3, a cut groove 12 is formed from the winding start position of the coil to the recess 6f on the lead terminal 4a side, and as shown in FIG. 1 (c), the groove 12 and the recess 6 are formed.
The lead wire 7a at the beginning of winding of the coil 7 is guided through f, and the lead wire 7a at the beginning of winding is wound around a rising portion at one end of the lead terminal 4a and soldered. In this way,
The winding start lead wire 7a is drawn out of the bobbin end 6a 'outer peripheral edge (rim outer peripheral edge) in a non-contact state and connected to the lead terminal 4a.
【００２７】一方、コイル７の巻終り位置は、凹部６ｆ
の底辺より高い位置にあるため、図１（ｃ）に示すよう
にコイル巻終り引出線７ｂが凹部６ｆを通ってリード端
子４ｂ一端の立ち上げ部に巻き付けられ半田１０付けさ
れている。このようにして、巻終り引出線７ｂはボビン
一端６ａ´外周縁と非接触状態で引出されてリード端子
４ｂと接続される。On the other hand, the winding end position of the coil 7 is
As shown in FIG. 1 (c), the coil winding end lead wire 7b is wound around the rising portion at one end of the lead terminal 4b and soldered 10 as shown in FIG. 1 (c). In this manner, the winding end lead wire 7b is drawn out of the bobbin end 6a 'without contact with the outer peripheral edge thereof, and is connected to the lead terminal 4b.
【００２８】このような引出線・リード端子接続状態を
保って、コイル７全体及び引出線７ａ，７ｂ，リード端
子４ａ，４ｂの在る中間部６ｂがエポキシ樹脂モールド
成形体９により覆われる。エポキシ樹脂は、コイル７と
線膨張係数の近似したものを用いたまた、本実施例はリ
ード端子４ａとボビン一端６ａ´のコイル巻始めとが、
及びリード端子４ｂとボビン一端６ａ´のコイル巻終り
とが微小距離ｌをおいて引出線７ａ，７ｂを介して接続
されるが、寸法的には、図４に示すように巻線時の線振
れ接触防止としてリード端子４ａ，４ｂに接触しない寸
法は、距離ｌを０．３ｍｍ以上保つのが望ましい。一
方、距離ｌの上限は、合成樹脂成形体体６の熱膨張収縮
を考えると２ｍｍ以下にするのが好ましい。これは、合
成樹脂成形体６の大きさが機種により異なるが、すべて
を満足させる寸法である。While maintaining such a connection between the lead wires and the lead terminals, the entire coil 7 and the intermediate portion 6b where the lead wires 7a and 7b and the lead terminals 4a and 4b are located are covered with the epoxy resin molded body 9. The epoxy resin used had a coefficient of linear expansion approximate to that of the coil 7. In this embodiment, the lead terminal 4a and the beginning of coil winding of the bobbin end 6a 'are:
The lead terminal 4b and the end of the coil at the end of the bobbin 6a 'are connected via the lead wires 7a and 7b at a small distance l, but the dimensions are as shown in FIG. It is desirable to keep the distance l of 0.3 mm or more for the dimension that does not come into contact with the lead terminals 4a and 4b for preventing shake contact. On the other hand, the upper limit of the distance 1 is preferably 2 mm or less in consideration of the thermal expansion and contraction of the synthetic resin molded body 6. This is a size that satisfies all, although the size of the synthetic resin molded body 6 differs depending on the model.
【００２９】例えば、従来品のようにボビン一端からリ
ード端子までのコイルの巻始め引出線が長い場合には、
図５の熱衝撃テストに示すように、１００〜２００の熱
サイクルで断線に至ってしまう。これは、引出線が長く
ボビン端部に引掛けており、コイルの線膨張係数に対し
合成樹脂成形体の線膨張係数は約４〜５倍あるために、
引張応力が加わり断線が生じるものと考えられる。For example, when the lead wire at the beginning of winding of the coil from one end of the bobbin to the lead terminal is long as in a conventional product,
As shown in the thermal shock test of FIG. 5, disconnection occurs in a thermal cycle of 100 to 200. This is because the lead wire is long and is hooked on the end of the bobbin, and the linear expansion coefficient of the synthetic resin molding is about 4 to 5 times the linear expansion coefficient of the coil.
It is considered that a tensile stress is applied to cause disconnection.
【００３０】これに対し、本実施例では、ボビン一端か
らリード端子までの距離ｌを２ｍｍとして熱衝撃テスト
を行ったところ、図５に示すように１０００回の熱サイ
クルでも断線は起こさなかった。On the other hand, in this embodiment, when a thermal shock test was performed with the distance l from one end of the bobbin to the lead terminal being 2 mm, no breakage occurred even after 1000 thermal cycles as shown in FIG.
【００３１】従って本実施例によれば、製造時，使用時
のコイルの断線防止を図り、しかも、外装として用いる
エポキシ樹脂の線膨張係数を引出線の線膨張係数に近似
させることで、さらに引張応力を緩和させ断線防止効果
を高める利点がある。Therefore, according to the present embodiment, it is possible to prevent the coil from being disconnected during manufacturing and use, and to make the coefficient of linear expansion of the epoxy resin used as the exterior more similar to the coefficient of linear expansion of the lead wire, thereby further increasing the tensile strength. There is an advantage that the stress is reduced and the effect of preventing disconnection is enhanced.
【００３２】なお、上記実施例では、コイル引出線７
ａ，７ｂをボビン一端に設けた案内溝１２，凹部６ｆを
通してボビン一端外周縁（つば部外周縁）に非接触状態
でリード端子側に案内しているが、これに代わり、例え
ばボビン一端６ａ´のつば部６ｅのエッジにアールを付
けて、このアールにそって引出線をリード端子側に案内
させてもよく、この場合、引出線の一部をボビン一端外
周縁に接触させたとしても、コイル引出線の断線防止を
有効に図り得る。In the above embodiment, the coil lead 7
a and 7b are guided to the lead terminal side in a non-contact state with the outer peripheral edge of the one end of the bobbin (the outer peripheral edge of the flange portion) through the guide groove 12 and the concave portion 6f provided at one end of the bobbin. A radius may be attached to the edge of the flange portion 6e, and the lead may be guided to the lead terminal side along the radius. In this case, even if a part of the lead is brought into contact with the outer peripheral edge of one end of the bobbin, It is possible to effectively prevent disconnection of the coil lead wire.
【００３３】図６は本発明の第２実施例で、第１実施例
と異なる点は、リード端子４ａ，４ｂの配置は図７の例
と同様にボビン一端６ａ´の引出し位置より比較的離し
てあるが、リード端子４ａ，４ｂのそれぞれとコイル引
出線７ａ，７ｂは直接接続しないで、その接続にワイヤ
１３を介在させた点にある。FIG. 6 shows a second embodiment of the present invention. The difference from the first embodiment is that the arrangement of the lead terminals 4a and 4b is relatively far from the position where the one end 6a 'of the bobbin is pulled out, as in the example of FIG. However, each of the lead terminals 4a and 4b is not directly connected to the coil lead wires 7a and 7b, but a wire 13 is interposed in the connection.
【００３４】ワイヤ１３は、それぞれリード端子４ａ，
４ｂに一端が半田付けされ、このワイヤ１３は合成樹脂
体６の外周に這う状態でその一端がボビン一端６ａ´の
コイル巻始め，巻終り位置と微小距離を保つようにそれ
ぞれ接近させてあり、この接近するワイヤ１３の一端が
立ち上げられて、引出線７ａ，７ｂがワイヤ一端に第１
実施例同様の手法により接続されている。The wires 13 are respectively connected to the lead terminals 4a,
4b, one end of which is soldered, and this wire 13 is close to the outer periphery of the synthetic resin body 6 so that one end is close to the coil winding start and end positions of the bobbin end 6a 'so as to keep a small distance therefrom. One end of the approaching wire 13 is raised, and the lead wires 7a and 7b are connected to one end of the wire by the first wire.
The connections are made in the same manner as in the embodiment.
【００３５】本実施例においても、第１実施例同様の効
果を奏する。In this embodiment, the same effects as in the first embodiment can be obtained.
【００３６】[0036]
【発明の効果】以上のように本発明によれば、外装モー
ルド方式を採用した電磁式回転センサであっても、耐熱
衝撃性に優れた引出線接続を実現して製造時や使用時の
断線防止を図ることができる。As described above, according to the present invention, even in the case of an electromagnetic rotation sensor employing an exterior molding method, a lead wire connection excellent in thermal shock resistance is realized, and disconnection at the time of manufacture or use is achieved. Prevention can be achieved.
【図１】（ａ）は本発明の第１実施例に係る一部切欠断
面図、（ｂ）はそのＡ−Ａ線矢視図、（ｃ）は要部断面
図1A is a partially cutaway sectional view according to a first embodiment of the present invention, FIG. 1B is a sectional view taken along line AA of FIG. 1, and FIG.
【図２】図１の（ａ）のＣ方向矢視図FIG. 2 is a view in the direction of arrow C in FIG.
【図３】第１実施例の部分斜視図FIG. 3 is a partial perspective view of the first embodiment.
【図４】ボビン端面からの距離ｌと断線率の関係を示す
説明図FIG. 4 is an explanatory diagram showing a relationship between a distance l from a bobbin end surface and a disconnection rate.
【図５】本発明品と従来品の熱衝撃テストの比較説明図FIG. 5 is an explanatory diagram showing a comparison between a thermal shock test of the present invention and a conventional product.
【図６】本発明の第２実施例に係る一部切欠断面図FIG. 6 is a partially cutaway sectional view according to a second embodiment of the present invention.
【図７】本発明を完成する前の試行過程で得られた試作
品の一例を示す説明図FIG. 7 is an explanatory view showing an example of a prototype obtained in a trial process before completing the present invention.
１…コア、２…マグネット、３…ヨーク、４ａ，４ｂ…
リード端子、６…合成樹脂体、６ａ…ボビン、６ａ´…
ボビン一端、６ｂ…中間部（胴部）、６ｃ…コネクタ、
６ｅ…つば部、６ｆ…凹部、７…コイル、７ａ…巻始め
引出線、７ｂ…巻終り引出線、９…モールド成形体（エ
ポキシ樹脂）、１０…半田、１２…溝、１３…ワイヤ、
１４…半田DESCRIPTION OF SYMBOLS 1 ... Core, 2 ... Magnet, 3 ... Yoke, 4a, 4b ...
Lead terminal, 6 ... synthetic resin body, 6a ... bobbin, 6a '...
Bobbin one end, 6b ... middle part (body part), 6c ... connector,
6e: collar portion, 6f: concave portion, 7: coil, 7a: winding start wire, 7b: winding end wire, 9: molded product (epoxy resin), 10: solder, 12: groove, 13: wire,
14 ... Solder
Claims (6)
リード端子が、ボビンを有する合成樹脂成形体と一体化
され、前記ボビンに電磁ピックアップ用のコイルが巻装
され、前記リード端子は、ボビン一端の前記コイルの巻
始め，巻終り位置と微小距離をおいて前記合成樹脂成形
体の外周に配置され、この微小距離にて前記リード端子
と前記コイルとが引出線（コイルの巻始め引出線，巻終
り引出線）を介して接続されると共に、前記引出線はそ
れぞれ前記ボビン一端の外周縁に非接触の状態でリード
端子側に案内されるか或いはボビン一端外周にアールを
設けて該アールに沿ってリード端子側に案内される引出
し構造とし、且つ少なくとも前記コイルがエポキシ樹脂
のモールド成形体により覆われて成ることを特徴とする
磁気式回転センサ。1. A magnetic circuit element such as a core and a magnet and a lead terminal are integrated with a synthetic resin molded body having a bobbin, a coil for an electromagnetic pickup is wound around the bobbin, and the lead terminal is connected to one end of the bobbin. The lead terminal and the coil are arranged on the outer periphery of the synthetic resin molded body at a small distance from the winding start and end positions of the coil, and the lead terminal and the coil are extended at this minute distance. And the lead wire is guided to the lead terminal side in a non-contact state with the outer peripheral edge of one end of the bobbin, or provided with a radius around the outer periphery of one end of the bobbin. A magnetic rotation sensor having a drawer structure guided along the lead terminal side along with the coil, and at least the coil is covered with a molded body of epoxy resin.
リード端子が、ボビンを有する合成樹脂成形体と一体化
され、前記ボビンに電磁ピックアップ用のコイルが巻装
され、前記リード端子にワイヤが半田付けされ、このワ
イヤは前記合成樹脂体の外周に這う状態で前記ボビン一
端の前記コイルの巻始め，巻終り位置と微小距離をおい
て配置され、この微小距離にて前記ワイヤと前記コイル
とが引出線（コイルの巻始め引出線，巻終り引出線）を
介して接続されると共に、前記引出線はそれぞれ前記ボ
ビン一端の外周縁に非接触の状態でワイヤ側に案内され
るか或いはボビン一端外周にアールを設けて該アールに
沿ってワイヤ側に案内される引出し構造とし、且つ少な
くとも前記コイルがエポキシ樹脂のモールド成形体によ
り覆われて成ることを特徴とする磁気式回転センサ。2. A magnetic circuit element such as a core and a magnet, and a lead terminal are integrated with a synthetic resin molded body having a bobbin, a coil for an electromagnetic pickup is wound around the bobbin, and a wire is soldered to the lead terminal. The wire is arranged at a small distance from the winding start and end positions of the coil at one end of the bobbin in a state of crawling along the outer periphery of the synthetic resin body. The lead wires are connected via lead wires (lead wire at the beginning of winding and lead wire at the end of winding), and each of the lead wires is guided to the wire side without contacting the outer peripheral edge of one end of the bobbin, or one end of the bobbin. The outer periphery is provided with a radius so as to be guided to the wire side along the radius, and at least the coil is covered with a molded body of epoxy resin. A magnetic rotation sensor characterized by the following.
ビン一端となるつば部の外周縁には、コイルの巻始め及
び巻終りの最寄りの位置に径方向の凹部が形成され、一
方、前記リード端子或いはワイヤの一端（ボビン寄りの
一端）は立ち上げ形成され、前記引出線がこの凹部を通
して前記リード端子或いはワイヤの立ち上げ部に接続さ
れてボビン一端外周縁と非接触状態を保っていることを
特徴とする磁気式回転センサ。3. A coil according to claim 1, wherein a radial concave portion is formed at a position near the beginning and end of winding of the coil at an outer peripheral edge of the collar portion serving as one end of the bobbin. One end of the lead terminal or the wire (one end near the bobbin) is formed to be raised, and the lead wire is connected to the raised portion of the lead terminal or the wire through this recess so as to maintain a non-contact state with the outer peripheral edge of the one end of the bobbin. A magnetic rotation sensor, characterized in that:
において、前記リード端子・ボビン一端間の距離或いは
前記ワイヤ・ボビン一端間の距離は、０．３〜２ｍｍと
してあることを特徴とする磁気式回転センサ。4. The device according to claim 1, wherein a distance between the lead terminal and one end of the bobbin or a distance between one end of the wire and the bobbin is 0.3 to 2 mm. Magnetic rotation sensor.
において、前記エポキシ樹脂は、前記コイルと線膨張係
数の近似したものを用いたことを特徴とする磁気式回転
センサ。5. The magnetic rotation sensor according to claim 1, wherein the epoxy resin has a coefficient of linear expansion approximate to that of the coil.
において、前記引出線が前記リード端子或いは前記ワイ
ヤに巻き付け及び半田付けにより接続してあることを特
徴とする磁気式回転センサ。6. The magnetic rotation sensor according to claim 1, wherein the lead wire is connected to the lead terminal or the wire by winding and soldering.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7654492A JP2656693B2 (en) | 1992-03-31 | 1992-03-31 | Magnetic rotation sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7654492A JP2656693B2 (en) | 1992-03-31 | 1992-03-31 | Magnetic rotation sensor |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05280919A JPH05280919A (en) | 1993-10-29 |
| JP2656693B2 true JP2656693B2 (en) | 1997-09-24 |
Family
ID=13608213
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7654492A Expired - Fee Related JP2656693B2 (en) | 1992-03-31 | 1992-03-31 | Magnetic rotation sensor |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2656693B2 (en) |
-
1992
- 1992-03-31 JP JP7654492A patent/JP2656693B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05280919A (en) | 1993-10-29 |
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