JP4680136B2

JP4680136B2 - Rotation angle detector

Info

Publication number: JP4680136B2
Application number: JP2006179499A
Authority: JP
Inventors: 勉池田
Original assignee: Aisan Industry Co Ltd
Current assignee: Aisan Industry Co Ltd
Priority date: 2006-06-29
Filing date: 2006-06-29
Publication date: 2011-05-11
Anticipated expiration: 2026-06-29
Also published as: JP2008008754A

Description

本発明は、回転部の回転角度を被接触の状態で検出する回転角度検出装置に関する。 The present invention relates to a rotation angle detection device that detects a rotation angle of a rotating unit in a contacted state.

上記した回転角度検出装置に関する技術が特許文献１に記載されている。
この回転角度検出装置は、回転部に取付けられており、回転中心を挟んで対向している一対の永久磁石と、固定部に取付けられた状態でそれらの永久磁石間に位置決めされており、前記回転部の回転に伴う前記永久磁石間の磁界の変化に基づいて前記回転部の回転角度を求める角度検出手段と、前記固定部に設けられており、前記角度検出手段と外部の機器とを電気的に接続するコネクタとを備えている。
前記回転角度検出装置では、図９（Ａ）に示すように、角度検出手段１００の複数本の電気接続端子１０２が、それらの電気接続端子１０２よりも強度が大きい複数本の導体１０５の一端部１０５ｔにそれぞれ接続されており、それらの導体１０５の他端側１０５ｚがコネクタの端子として使用される。
角度検出手段１００の電気接続端子１０２と導体１０５の一端部１０５ｔとの接続が行なわれると、図９（Ｂ）に示すように、電気接続端子１０２と導体１０５との接続部分が第１の型（図示省略）内にインサートされて第１樹脂成形部１０６が成形され、電気接続端子１０２と導体１０５とが一体化される。次に、第１樹脂成形部１０６の外にある角度検出手段１００と、第１樹脂成形部１０６とが鉄製のステータコア１０７に覆われた状態で、そのステータコア１０７及び導体１０５が成形型（図示省略）にインサートされ、前記固定部が樹脂成形される。この状態で、回転部と固定部とが位置合わせされることで、回転部の永久磁石と固定部の角度検出手段とが一定の位置関係になる。 A technique related to the above-described rotation angle detection device is described in Patent Document 1.
The rotation angle detection device is attached to the rotation unit, and is positioned between the pair of permanent magnets facing each other with the rotation center therebetween and in a state of being attached to the fixed unit. An angle detecting means for obtaining a rotation angle of the rotating portion based on a change in the magnetic field between the permanent magnets accompanying the rotation of the rotating portion, and provided in the fixed portion, and electrically connecting the angle detecting means and an external device. And a connector to be connected.
In the rotation angle detection device, as shown in FIG. 9A, the plurality of electrical connection terminals 102 of the angle detection means 100 have one end portion of the plurality of conductors 105 whose strength is higher than those of the electrical connection terminals 102. The other end side 105z of the conductor 105 is used as a connector terminal.
When the electrical connection terminal 102 of the angle detection means 100 and the one end portion 105t of the conductor 105 are connected, the connection portion between the electrical connection terminal 102 and the conductor 105 is the first type as shown in FIG. 9B. The first resin molding portion 106 is molded by being inserted into (not shown), and the electrical connection terminal 102 and the conductor 105 are integrated. Next, in a state where the angle detection means 100 outside the first resin molding portion 106 and the first resin molding portion 106 are covered with the iron stator core 107, the stator core 107 and the conductor 105 are molded (not shown). ) And the fixed portion is resin-molded. In this state, when the rotating part and the fixed part are aligned, the permanent magnet of the rotating part and the angle detecting means of the fixed part have a fixed positional relationship.

特開２００１−２８９６１０号公報JP 2001-289610 A

しかし、上記した回転角度検出装置によると、第１樹脂成形部１０６は、角度検出手段１００の電気接続端子１０２と導体１０５の一端部１０５ｔとの接続部分のみを覆う構成で、角度検出手段１００は第１樹脂成形部１０６の外に位置している。即ち、電気接続端子１０２の一部は、角度検出手段１００と共に第１樹脂成形部１０６の外に位置している。このため、例えば、電気接続端子１０２が外力により変形して角度検出手段１００が位置ずれを起こすと、ステータコア１０７の組付けに手間が掛るとともに、組付け不良を起こすこともある。 However, according to the rotation angle detection device described above, the first resin molding portion 106 is configured to cover only the connection portion between the electrical connection terminal 102 of the angle detection means 100 and the one end portion 105t of the conductor 105. It is located outside the first resin molding part 106. That is, a part of the electrical connection terminal 102 is located outside the first resin molding portion 106 together with the angle detection means 100. For this reason, for example, when the electrical connection terminal 102 is deformed by an external force and the angle detection means 100 is displaced, it takes time to assemble the stator core 107 and may cause an assembly failure.

本発明は、上記問題点を解決するためになされたものであり、本発明の技術的課題は、製造途中で電気接続端子が変形等しないようにして角度検出手段の位置ずれを防止し、回転角度検出装置の製造不良が発生しないようにすることである。 The present invention has been made to solve the above-mentioned problems, and the technical problem of the present invention is to prevent the positional displacement of the angle detection means by preventing the electric connection terminals from being deformed or the like during the manufacture, and to rotate. This is to prevent manufacturing defects of the angle detection device from occurring.

上記した課題は、各請求項の発明によって解決される。
請求項１の発明は、回転部に取付けられており、回転中心を挟んで対向している少なくとも一対の永久磁石と、固定部に取付けられた状態でそれらの永久磁石間に位置決めされており、前記回転部の回転に伴う前記永久磁石間の磁界の変化に基づいて前記回転部の回転角度を求める角度検出手段と、前記固定部に設けられており、前記角度検出手段と外部の機器とを電気的に接続するコネクタとを備える回転角度検出装置であって、前記角度検出手段の複数本の電気接続端子が、それらの電気接続端子よりも強度が大きい複数本の導体の一端部にそれぞれ接続されて、それらの導体の他端側が前記コネクタの端子として使用される構成であり、少なくも前記電気接続端子、及び前記角度検出手段の一部、及び前記電気接続端子に接続された前記導体の一端部とを第１の型内にインサートし、その第１の型により樹脂を成形することで得られる第１樹脂成形部と、前記第１樹脂成形部から突出した前記導体を第２の型内にインサートし、その第２の型により樹脂を成形することで得られる第２樹脂成形部とを有し、前記固定部は前記第１樹脂成形部と第２樹脂成形部とから構成されて、その第２樹脂成形部に前記コネクタが形成される構成であり、前記第１樹脂成形部は、前記第２の型内にインサートされる埋設部位と、前記第２の型から突出する突出部位と、前記埋設部位と突出部位との間に一定幅で設けられた境界部位とを備えており、前記突出部位と埋設部位には、その突出部位の先端に近づくにつれて細くなるようなテーパが設けられており、前記境界部位にはテーパが設けられていないことを特徴とする。 The above-described problems are solved by the inventions of the claims.
The invention of claim 1 is attached to the rotating part, and is positioned between the permanent magnets in a state of being attached to the fixed part and at least a pair of permanent magnets facing each other across the rotation center, An angle detecting means for obtaining a rotation angle of the rotating part based on a change in the magnetic field between the permanent magnets accompanying the rotation of the rotating part, provided in the fixed part, and the angle detecting means and an external device. A rotation angle detection device comprising a connector for electrical connection, wherein the plurality of electrical connection terminals of the angle detection means are respectively connected to one end portions of a plurality of conductors having strength greater than those electrical connection terminals. The other end side of these conductors is used as a terminal of the connector, and at least before being connected to the electrical connection terminal, a part of the angle detection means, and the electrical connection terminal. One end of the conductor is inserted into the first mold, and the first resin molded part obtained by molding the resin with the first mold and the conductor protruding from the first resin molded part are second And a second resin molding part obtained by molding a resin with the second mold, and the fixing part is composed of the first resin molding part and the second resin molding part. is a said connector Ru is formed configured to the second resin molded portion, the first resin molding part includes a buried portion to be inserted into said second mold, projects from the second mold A protruding portion and a boundary portion provided with a certain width between the embedded portion and the protruding portion, and the protruding portion and the embedded portion are tapered so as to become narrower as they approach the tip of the protruding portion. The boundary portion is provided with a taper. Characterized in that it is not.

本発明によると、第１樹脂成形部は、少なくも電気接続端子、及び角度検出手段の一部、及び電気接続端子に接続された導体の一端部とを第１の型内にインサートした状態で型成形されている。即ち、少なくも電気接続端子、及び角度検出手段の一部、及び電気接続端子に接続された導体の一端部とが樹脂によって固められている。このため、電気接続端子の強度が低い場合でも製造途中で電気接続端子が変形等することがなく、角度検出手段は第１樹脂成形部によって導体に対して一定の位置関係に保持されている。
さらに、第２樹脂成形部は、第１樹脂成形部から突出した導体を第２の型内にインサートした状態で型成形されており、固定部のコネクタを備える部分を構成する。このように、第１樹脂成形部により導体に対して位置ずれしないように角度検出手段を固定した状態で、その導体を第２の型内にインサートするため、前記角度検出手段が第２樹脂成形部に対して位置ずれを起こすことがない。即ち、製造途中で角度検出手段が位置ずれを起こすことがないため、回転角度検出装置の製造不良が発生しない。
また、第１樹脂成形部の突出部位と埋設部位には、その突出部位の先端に近づくにつれて細くなるようなテーパが設けられているため、成形後に第１樹脂成形部を第１の型から外し易くなる。
さらに、第１樹脂成形部の境界部位にはテーパが設けられていないため、第２の型内に第１樹脂成形部の埋設部位がインサートされた状態で、第２の型と第１樹脂成形部の境界部位との間に隙間が形成されることがない。したがって、第２樹脂成形部が成形された後に、その第２樹脂成形部と第１樹脂成形部の境界部位との間にバリが生じ難くなる。 According to the present invention, the first resin molding portion is inserted in the first mold with at least the electrical connection terminal, a part of the angle detection means, and one end of the conductor connected to the electrical connection terminal. Molded. That is, at least the electrical connection terminal, a part of the angle detection means, and one end of the conductor connected to the electrical connection terminal are solidified by the resin. For this reason, even when the strength of the electrical connection terminal is low, the electrical connection terminal is not deformed during the manufacturing process, and the angle detection means is held in a fixed positional relationship with the conductor by the first resin molding portion.
Further, the second resin molding part is molded with the conductor protruding from the first resin molding part being inserted into the second mold, and constitutes a part including the connector of the fixed part. In this way, the angle detection means is inserted into the second mold in a state where the angle detection means is fixed so as not to be displaced with respect to the conductor by the first resin molding portion. There is no misalignment with respect to the part. That is, since the angle detecting means does not cause a position shift during the manufacturing, the manufacturing failure of the rotation angle detecting device does not occur.
In addition, since the protruding portion and the embedded portion of the first resin molding portion are provided with a taper that becomes thinner as approaching the tip of the protruding portion, the first resin molding portion is removed from the first mold after molding. It becomes easy.
Furthermore, since the taper is not provided at the boundary part of the first resin molding part, the second mold and the first resin molding are performed with the embedded part of the first resin molding part inserted in the second mold. No gap is formed between the boundary portions of the parts. Therefore, after the second resin molding part is molded, burrs are hardly generated between the second resin molding part and the boundary part of the first resin molding part.

請求項２の発明によると、角度検出手段は、永久磁石間の磁界の方向に基づいて回転部の回転角度を求めるように構成されていることを特徴とする。このため、磁界の強さを検出して回転角度を検出する場合に必要なステータコアが不要になる。
請求項３の発明によると、角度検出手段は、回転部における永久磁石間の磁界の変化を検出する磁気検出素子と、その磁気検出素子の出力信号に基づいて前記回転部の回転角度を求める演算部とを備えていることを特徴とする。
請求項４の発明によると、第１樹脂成形部を構成する樹脂材と、角度検出手段に使用される樹脂材とは、略同一の線膨張係数を備えていることを特徴とする。
このため、周辺温度の変化により第１樹脂成形部と角度検出手段とが伸縮した場合でも、角度検出手段に加わる応力を小さくすることができる。 According to a second aspect of the present invention, the angle detection means is configured to obtain the rotation angle of the rotating portion based on the direction of the magnetic field between the permanent magnets. For this reason, a stator core required for detecting the rotation angle by detecting the strength of the magnetic field becomes unnecessary.
According to a third aspect of the present invention, the angle detection means calculates a rotation angle of the rotation unit based on a magnetic detection element that detects a change in the magnetic field between the permanent magnets in the rotation unit and an output signal of the magnetic detection element. And a portion.
According to invention of Claim 4, the resin material which comprises the 1st resin molding part, and the resin material used for an angle detection means are provided with the substantially the same linear expansion coefficient, It is characterized by the above-mentioned.
For this reason, even when the first resin molding part and the angle detection means expand and contract due to changes in the ambient temperature, the stress applied to the angle detection means can be reduced.

請求項５の発明によると、第１樹脂成形部を構成する樹脂材の線膨張係数は、第２樹脂成形部を構成する樹脂材の線膨張係数よりも、前記角度検出手段に使用されている樹脂材の線膨張係数に近いことを特徴とする。 According to invention of Claim 5, the linear expansion coefficient of the resin material which comprises the 1st resin molding part is used for the said angle detection means rather than the linear expansion coefficient of the resin material which comprises the 2nd resin molding part. It is characterized by being close to the linear expansion coefficient of the resin material.

請求項６の発明によると、角度検出手段の電気接続端子とコネクタとをつなぐ導体は、第１樹脂成形部に埋め込まれる第１導体と、前記コネクタの端子を構成する第２導体とに分割されており、第１樹脂成形部から突出した第１導体と、その第１導体と第２導体との結合部分、及び前記第２導体が第２樹脂成形部に埋め込まれていることを特徴とする。
このように、導体を第１導体と第２導体とに分割できるため、第１樹脂成形部を共通にして、第２樹脂成形部を種々に変更し、多種類の固定部を製作できるようになる。 According to the invention of claim 6 , the conductor connecting the electrical connection terminal of the angle detection means and the connector is divided into the first conductor embedded in the first resin molding part and the second conductor constituting the terminal of the connector. The first conductor protruding from the first resin molding part, the coupling portion between the first conductor and the second conductor, and the second conductor are embedded in the second resin molding part. .
As described above, since the conductor can be divided into the first conductor and the second conductor, the first resin molding portion can be shared, the second resin molding portion can be changed variously, and various types of fixing portions can be manufactured. Become.

請求項７の発明によると、第１樹脂成形部は略円柱形に成形されていることを特徴とする。このため、第１樹脂成形部の埋設部位、及び導体を第２の型内にインサートする際に、第１樹脂成形部を中心にして導体を回転方向に変位させられるようになり、導体の位置決めが容易になる。
請求項８の発明によると、第１樹脂成形部の表面には、前記角度検出手段に達する凹部が形成されていることを特徴とする。
請求項９の発明によると、回転部は、内燃機関の吸気通路に設けられた吸入空気量制御手段のシャフトであり、固定部は吸入空気量制御手段のケースであることを特徴とする。
According to the seventh aspect of the present invention, the first resin molding portion is formed in a substantially cylindrical shape. For this reason, when the embedded part of the first resin molding part and the conductor are inserted into the second mold, the conductor can be displaced in the rotational direction around the first resin molding part, and the positioning of the conductor Becomes easier.
The invention according to claim 8 is characterized in that a recess reaching the angle detecting means is formed on the surface of the first resin molding portion .
According to a ninth aspect of the present invention, the rotating portion is a shaft of intake air amount control means provided in the intake passage of the internal combustion engine, and the fixed portion is a case of intake air amount control means.

本発明によると、製造途中で電気接続端子が変形等することがなく、角度検出手段が位置ずれしないため、回転角度検出装置の製造不良を防止できる。 According to the present invention, the electrical connection terminal is not deformed during the manufacturing process, and the angle detecting means is not displaced. Therefore, it is possible to prevent a defective manufacturing of the rotation angle detecting device.

［実施形態１］
以下、図１から図８に基づいて本発明の実施形態１に係る回転角度検出装置の説明を行う。ここで、図１は本実施形態に係る回転角度検出装置を備えるスロットル制御装置の平断面図、図２は本実施形態に係る回転角度検出装置の測定原理図である。また、図３〜図８は回転角度検出装置の製造方法を表す縦断面図、斜視図等である。 [Embodiment 1]
Hereinafter, the rotation angle detection device according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 8. Here, FIG. 1 is a plan sectional view of a throttle control device provided with a rotation angle detection device according to the present embodiment, and FIG. 2 is a measurement principle diagram of the rotation angle detection device according to the present embodiment. 3 to 8 are a longitudinal sectional view, a perspective view and the like showing a manufacturing method of the rotation angle detecting device.

＜スロットル制御装置１０の概要について＞
回転角度検出装置４０の説明を行う前に、この回転角度検出装置４０を備えるスロットル制御装置１０の概要について説明する。
スロットル制御装置１０は、エンジンの吸入空気量の調節に使用される電子制御式装置であり、自動車の運転室内に設置されたアクセルペタル（図示省略）の動作と連動するように構成されている。
スロットル制御装置１０は、スロットルボデー１２を備えている。スロットルボデー１２は、図１に示すように、空気流路であるボア１３を形成する中空円筒状のボア壁部１４とモータハウジング部１７とを一体に有している。ボア壁部１４は、上流側がエアクリーナ（図示省略）に接続され、下流側がインテークマニホールド（図示省略）に接続される。
スロットルボデー１２のボア壁部１４には、前記ボア１３を径方向に横切る金属製のスロットルシャフト１６が通されている。スロットルシャフト１６は、ボア壁部１４の左右の設けられた軸受部１５によって回転可能に支持されている。
スロットルシャフト１６には、ボア１３内で回転可能に構成された円板状のスロットルバルブ１８がスクリュ１８ｓによって固定されている。 <About the outline of the throttle control device 10>
Before describing the rotation angle detection device 40, an outline of the throttle control device 10 including the rotation angle detection device 40 will be described.
The throttle control device 10 is an electronically controlled device used for adjusting the intake air amount of the engine, and is configured to be interlocked with the operation of an accelerator petal (not shown) installed in the cab of the automobile.
The throttle control device 10 includes a throttle body 12. As shown in FIG. 1, the throttle body 12 integrally has a hollow cylindrical bore wall portion 14 that forms a bore 13 that is an air flow path and a motor housing portion 17. The bore wall 14 has an upstream side connected to an air cleaner (not shown) and a downstream side connected to an intake manifold (not shown).
A metal throttle shaft 16 that passes through the bore 13 in the radial direction is passed through the bore wall portion 14 of the throttle body 12. The throttle shaft 16 is rotatably supported by bearing portions 15 provided on the left and right sides of the bore wall portion 14.
A disk-like throttle valve 18 configured to be rotatable in the bore 13 is fixed to the throttle shaft 16 by a screw 18s.

また、右側の軸受部１５を貫通したスロットルシャフト１６の端部には扇形のスロットルギヤ２２が回り止めされた状態で同軸に固定されている。スロットルギヤ２２は、回転中心位置にある内筒部２２ｅと、その内筒部２２ｅの外側に設けられた外筒部２２ｆと、その外筒部２２ｆの回りに形成された扇形のギヤ部２２ｗとを備えている。そして、スロットルギヤ２２の内筒部２２ｅの内壁面に、後記する回転角度検出装置４０の筒状のヨーク４３（図２（Ａ）参照）と一対の永久磁石４１（以下、磁石４１という）とが固定されている。
さらに、右側の軸受部１５とスロットルギヤ２２の外筒部２２ｆとの周囲には、スロットバルブ１８を閉じる方向へ付勢されたコイル状のバックスプリング２４ｓが装着されている。 Further, a fan-shaped throttle gear 22 is coaxially fixed to the end of the throttle shaft 16 penetrating the right bearing portion 15 in a state in which the fan-shaped throttle gear 22 is prevented from rotating. The throttle gear 22 includes an inner cylinder portion 22e at the rotation center position, an outer cylinder portion 22f provided outside the inner cylinder portion 22e, and a fan-shaped gear portion 22w formed around the outer cylinder portion 22f. It has. A cylindrical yoke 43 (see FIG. 2A) of a rotation angle detecting device 40, which will be described later, and a pair of permanent magnets 41 (hereinafter referred to as magnets 41) are formed on the inner wall surface of the inner cylindrical portion 22e of the throttle gear 22. Is fixed.
Further, a coiled back spring 24 s that is biased in the direction of closing the slot valve 18 is mounted around the right bearing portion 15 and the outer cylinder portion 22 f of the throttle gear 22.

前記スロットルボデー１２のモータハウジング部１７は、スロットルシャフト１６の軸線に対してほぼ平行となるように有底円筒状に形成されている。そして、モータハウジング部１７内に、例えばＤＣモータ等からなるモータ１７ｍが収納されている。
また、スロットルボデー１２には、ボア壁部１４とモータハウジング部１７との間の位置にスロットルシャフト１６と平行なカウンタシャフト２３が設けられている。そして、前記カウンタシャフト２３にカウンタギヤ２４が回転可能に支持されている。カウンタギヤ２４はギヤ径の異なる二つのギヤ部２４ａ，２４ｂを有しており、大径側のギヤ部２４ａがモータ１７ｍの出力回転軸（図示省略）のモータピニオン１７ｐと噛合しており、小径側のギヤ部２４ｂが前記スロットルギヤ２２のギヤ部２２ｗと噛合している。
このため、モータ１７ｍがエンジンコントロールユニット（ＥＣＵ）（図示省略）からの信号でアクセルペダルの踏み込み量等に基づいて駆動されると、モータ１７ｍの回転力はモータピニオン１７ｐ、カウンタギヤ２４、スロットルギヤ２２を介してスロットルシャフト１６に伝達される。これによって、スロットバルブ１８がバックスプリング２４ｓのバネ力に抗してボア１３内で回転し、ボア１３を流れる吸入空気量がコントロールされる。 The motor housing portion 17 of the throttle body 12 is formed in a bottomed cylindrical shape so as to be substantially parallel to the axis of the throttle shaft 16. In the motor housing portion 17, a motor 17m made of, for example, a DC motor is accommodated.
Further, the throttle body 12 is provided with a counter shaft 23 parallel to the throttle shaft 16 at a position between the bore wall portion 14 and the motor housing portion 17. A counter gear 24 is rotatably supported on the counter shaft 23. The counter gear 24 has two gear portions 24a and 24b having different gear diameters, and the large-diameter side gear portion 24a meshes with a motor pinion 17p of an output rotation shaft (not shown) of the motor 17m. The gear portion 24b on the side meshes with the gear portion 22w of the throttle gear 22.
For this reason, when the motor 17m is driven based on the amount of depression of the accelerator pedal or the like by a signal from an engine control unit (ECU) (not shown), the rotational force of the motor 17m is the motor pinion 17p, the counter gear 24, the throttle gear. 22 to the throttle shaft 16. As a result, the slot valve 18 rotates in the bore 13 against the spring force of the back spring 24s, and the amount of intake air flowing through the bore 13 is controlled.

スロットルボデー１２の右側面は、側面カバー５０によって覆われている。側面カバー５０は、モータハウジング部１７の開口１７ｋを塞ぐとともに、モータピニオン１７ｐ、カウンタギヤ２４、スロットルギヤ２２等を覆う樹脂製のカバーである。側面カバー５０には、回転角度検出装置４０の角度検出手段４２（図２（Ｂ）参照）を備える略円柱形の第1樹脂成形部５２が一体化されている。そして、側面カバー５０が、図１に示すように、スロットルボデー１２の右側面に取付けられた状態で、第1樹脂成形部５２の先端部分（角度検出手段４２の支持部）がスロットルギヤ２２のヨーク４３（図２（Ａ）参照）、及び永久磁石４１間に同軸、かつ被接触状態で挿入される。 The right side surface of the throttle body 12 is covered with a side surface cover 50. The side cover 50 is a resin cover that closes the opening 17k of the motor housing portion 17 and covers the motor pinion 17p, the counter gear 24, the throttle gear 22, and the like. The side cover 50 is integrated with a substantially cylindrical first resin molding portion 52 provided with an angle detection means 42 (see FIG. 2B) of the rotation angle detection device 40. As shown in FIG. 1, with the side cover 50 attached to the right side surface of the throttle body 12, the tip portion of the first resin molding portion 52 (the support portion of the angle detection means 42) is the throttle gear 22. It is inserted coaxially between the yoke 43 (see FIG. 2A) and the permanent magnet 41 in a contacted state.

＜回転角度検出装置４０の構成について＞
回転角度検出装置４０は、スロットルシャフト１６の回転角度に基づいてスロットルバルブ１８の開度を検出する装置であり、図２（Ａ）（Ｂ）に示すように、スロットルギヤ２２の内筒部２２ｅに設けられたヨーク４３、及び一対の磁石４１と、側面カバー５０の第1樹脂成形部５２に埋め込まれた角度検出手段４２とを備えている。
ヨーク４３は、磁性材料により円筒形に形成されており、スロットルシャフト１６と同軸に位置決めされている。そして、ヨーク４３の内壁面にＮ極とＳ極とを構成する円弧形の磁石４１が中心を挟んで対向する位置に固定されている。一対の磁石４１は、図２（Ａ）に示すように、ヨーク４３内の空間にほぼ平行な磁界を発生させることができるように、平行着磁されている。
一対の磁石４１間には、図２（Ａ）（Ｂ）に示すように、回転角度検出装置４０の角度検出手段４２が規定位置に位置決めされている。角度検出手段４２は、ヨーク４３、及び磁石４１がスロットルシャフト１６と共に回転することによる磁界の方向の変化を検出し、その磁界の方向の変化に基づいて演算によりスロットルシャフト１６、及びスロットルバルブ１８（以下、スロットルシャフト１６という）の回転角度を求める装置である。角度検出手段４２は、フェールセーフを考慮して二台一組で使用され、一台が故障した場合でも他の一台が動作することにより検出不能とならないように配慮されている。
即ち、スロットルシャフト１６が本発明の回転部に相当し、第1樹脂成形部５２を備える側面カバー５０が本発明の固定部に相当する。また、スロットル制御装置１０が本発明の吸入空気量制御手段に相当する。 <Configuration of Rotation Angle Detection Device 40>
The rotation angle detection device 40 is a device that detects the opening of the throttle valve 18 based on the rotation angle of the throttle shaft 16, and as shown in FIGS. 2 (A) and 2 (B), the inner cylinder portion 22e of the throttle gear 22 is provided. And a pair of magnets 41, and an angle detection means 42 embedded in the first resin molding portion 52 of the side cover 50.
The yoke 43 is formed of a magnetic material in a cylindrical shape, and is positioned coaxially with the throttle shaft 16. And the arc-shaped magnet 41 which comprises N pole and S pole on the inner wall surface of the yoke 43 is being fixed to the position which opposes on both sides of the center. As shown in FIG. 2A, the pair of magnets 41 are parallel magnetized so that a magnetic field substantially parallel to the space in the yoke 43 can be generated.
Between the pair of magnets 41, as shown in FIGS. 2A and 2B, the angle detection means 42 of the rotation angle detection device 40 is positioned at a specified position. The angle detection means 42 detects a change in the direction of the magnetic field due to the rotation of the yoke 43 and the magnet 41 together with the throttle shaft 16, and based on the change in the direction of the magnetic field, the throttle shaft 16 and the throttle valve 18 ( Hereinafter, it is a device for obtaining the rotation angle of the throttle shaft 16). The angle detection means 42 is used as a set of two in consideration of fail-safe, so that even if one of the units breaks down, the other one operates to prevent detection.
That is, the throttle shaft 16 corresponds to the rotating portion of the present invention, and the side cover 50 including the first resin molding portion 52 corresponds to the fixing portion of the present invention. The throttle control device 10 corresponds to the intake air amount control means of the present invention.

角度検出手段４２は、図２（Ｂ）、図３等に示すように、磁界の方向を検出し、その磁界の方向に対応する信号を発生させる磁気検出素子４５と、磁気検出素子４５の信号に基づいてスロットルシャフト１６の回転角度を演算する演算部４６とを備えている。
角度検出手段４２の演算部４６は、半導体集積回路（ＩＣ）から構成されており、スロットルシャフト１６の回転角度に対応するリニアな電圧信号を出力できるようにプログラムされている。さらに、演算部４６には、図４等に示すように、電源用（入力用）の電気接続端子４７ａ、接地（アース）用の電気接続端子４７ｂ、及び信号出力用の電気接続端子４７ｃが設けられており、各々の電気接続端子４７ａ，４７ｂ，４７ｃがそれぞれ強度の高いＬ形導体４９ａ，４９ｂ，４９ｃに電気的に接続されている（以下、単に接続という）。さらに、電源用のＬ形導体４９ａと接地用のＬ形導体４９ｂとの間、及び接地用のＬ形導体４９ｂと信号出力用のＬ形導体４９ｃとの間には、雑音防止用のチップコンデンサ４８が接続されている。
二台の角度検出手段４２、チップコンデンサ４８、及びＬ形導体４９ａ，４９ｂ，４９ｃは、図２（Ｂ）、図５に示すように、第1樹脂成形部５２に埋め込まれた状態で側面カバー５０の所定位置に固定される。これにより、側面カバー５０がスロットルボデー１２の右側面に取付けられた状態で、前述のように、第1樹脂成形部５２の先端部分がスロットルギヤ２２のヨーク４３（図２（Ａ）参照）、及び永久磁石４１間に被接触状態で挿入される。この状態で、二台の角度検出手段４２の磁気検出素子４５は、図２（Ａ）（Ｂ）に示すように、スロットルシャフト１６とほぼ同軸状態に保持されて一対の磁石４１間に配置され、さらに磁気検出素子４５の前面（先端面）はスロットルシャフト１６の軸線Ｐと直角になる。 As shown in FIGS. 2B and 3, the angle detection unit 42 detects the direction of the magnetic field and generates a signal corresponding to the direction of the magnetic field, and the signal of the magnetic detection element 45. And a calculation unit 46 for calculating the rotation angle of the throttle shaft 16 based on the above.
The calculation unit 46 of the angle detection means 42 is composed of a semiconductor integrated circuit (IC) and is programmed so as to output a linear voltage signal corresponding to the rotation angle of the throttle shaft 16. Further, as shown in FIG. 4 and the like, the arithmetic unit 46 is provided with an electrical connection terminal 47a for power supply (input), an electrical connection terminal 47b for ground (earth), and an electrical connection terminal 47c for signal output. The electrical connection terminals 47a, 47b, and 47c are electrically connected to the L-shaped conductors 49a, 49b, and 49c having high strength (hereinafter simply referred to as connections). Further, a chip capacitor for noise prevention is provided between the L-shaped conductor 49a for power supply and the L-shaped conductor 49b for grounding, and between the L-shaped conductor 49b for grounding and the L-shaped conductor 49c for signal output. 48 is connected.
The two angle detecting means 42, the chip capacitor 48, and the L-shaped conductors 49a, 49b, 49c are embedded in the first resin molding portion 52 as shown in FIGS. It is fixed at 50 predetermined positions. Thus, with the side cover 50 attached to the right side surface of the throttle body 12, as described above, the tip portion of the first resin molding portion 52 is the yoke 43 of the throttle gear 22 (see FIG. 2A), And it is inserted between the permanent magnets 41 in a contacted state. In this state, as shown in FIGS. 2A and 2B, the magnetic detection elements 45 of the two angle detection means 42 are held substantially coaxially with the throttle shaft 16 and disposed between the pair of magnets 41. Further, the front surface (tip surface) of the magnetic detection element 45 is perpendicular to the axis P of the throttle shaft 16.

＜第1樹脂成形部５２の成形について＞
第1樹脂成形部５２は、第１の型６０により成形される。第１の型６０は、図３、図４に示すように、型本体６２と押え型６４とから構成されている。型本体６２は、第1樹脂成形部５２の先端面５２ｆ（図２（Ｂ）参照）と外周面５２ｒとを成形する型であり、略凹円柱形の成形凹部６２ｆを備えている。押え型６４は、第1樹脂成形部５２の基端面５２ｋ（図２（Ｂ）参照）を成形する型であり、型本体６２の成形凹部６２ｆの開口を塞ぐことができるように構成されている（図４参照）。
型本体６２の成形凹部６２ｆの底部には、図４に示すように、その成形凹部６２ｆに最初にセットされる一方の角度検出手段４２、チップコンデンサ４８、及びＬ形導体４９ａ，４９ｂ，４９ｃ（以下、No.1角度検出手段４２という）を定位置に位置決めするための一対の段部６２ｄが設けられている。一対の段部６２ｄは、磁気検出素子４５の幅方向両側に形成された突起４５ｔが、成形凹部６２ｆの仮想中心線Ｌに沿う方向から係合できるように構成されている。さらに、成形凹部６２ｆの開口縁には、No.1角度検出手段４２のＬ形導体４９ａ，４９ｂ，４９ｃの露出部分が嵌合する凹部６２ｃ（図３参照）が三箇所に形成されている。即ち、No.1角度検出手段４２は、磁気検出素子４５の突起４５ｔが、図４に示すように、それぞれ段部６２ｄに支持され、さらにＬ形導体４９ａ，４９ｂ，４９ｃの露出部分がそれぞれ凹部６２ｃと嵌合するように、型本体６２の成形凹部６２ｆにセットされる。この状態で、No.1角度検出手段４２の磁気検出素子４５は、型本体６２の成形凹部６２ｆの底面に平行な状態で、その成形凹部６２ｆの底部中央に位置決めされる。 <About the molding of the first resin molding part 52>
The first resin molding part 52 is molded by the first mold 60. As shown in FIGS. 3 and 4, the first mold 60 includes a mold body 62 and a presser mold 64. The mold main body 62 is a mold that molds the front end surface 52f (see FIG. 2B) of the first resin molding portion 52 and the outer peripheral surface 52r, and includes a substantially concave cylindrical molding concave portion 62f. The presser mold 64 is a mold that molds the base end face 52k (see FIG. 2B) of the first resin molding portion 52, and is configured to close the opening of the molding recess 62f of the mold body 62. (See FIG. 4).
As shown in FIG. 4, one of the angle detection means 42, the chip capacitor 48, and the L-shaped conductors 49a, 49b, and 49c (first set in the molding recess 62f) are provided at the bottom of the molding recess 62f of the mold body 62. Hereinafter, a pair of stepped portions 62d for positioning the No. 1 angle detecting means 42) at a fixed position is provided. The pair of stepped portions 62d is configured such that protrusions 45t formed on both sides in the width direction of the magnetic detection element 45 can be engaged from the direction along the virtual center line L of the molding recessed portion 62f. Further, the opening edge of the molding recess 62f is formed with three recesses 62c (see FIG. 3) into which the exposed portions of the L-shaped conductors 49a, 49b, 49c of the No. 1 angle detection means 42 are fitted. That is, in the No. 1 angle detection means 42, as shown in FIG. 4, the protrusion 45t of the magnetic detection element 45 is supported by the step portion 62d, and the exposed portions of the L-shaped conductors 49a, 49b, 49c are recessed. It is set in the molding recess 62f of the mold main body 62 so as to be fitted with the 62c. In this state, the magnetic detection element 45 of the No. 1 angle detection means 42 is positioned in the center of the bottom of the molding recess 62f in a state parallel to the bottom surface of the molding recess 62f of the mold body 62.

No.2角度検出手段４２は、図３に示すように、型本体６２の成形凹部６２ｆの仮想中心線Ｌを挟んでNo.1角度検出手段４２と反対側に位置決めされる。No.2角度検出手段４２は、磁気検出素子４５がNo.1角度検出手段４２の磁気検出素子４５に重ねられるように、その成形凹部６２ｆにセットされる。そして、この状態で、No.2角度検出手段４２のＬ形導体４９ａ，４９ｂ，４９ｃの露出部分が成形凹部６２ｆの開口縁に形成された三箇所の凹部６２ｘとそれぞれ嵌合するようになる。なお、図３は、No.2角度検出手段４２のセット途中状態を表している。
また、型本体６２の成形凹部６２ｆの底部には、誤セット防止用突起６２ｐが前記段部６２ｄよりも軸方向（開口側）に突出するように形成されている。そして、その誤セット防止用突起６２ｐの先端に、型本体６２の成形凹部６２ｆにセットされたNo.2角度検出手段４２が接触するように構成されている。これにより、誤ってNo.1角度検出手段４２がNo.2角度検出手段４２のセット位置側に挿入されると、そのNo.1角度検出手段４２が誤セット防止用突起６２ｐに当接して段部６２ｄにセットできなくなる。即ち、No.1角度検出手段４２のセット不良になり、誤組付けが防止できる。
このようにして、No.1角度検出手段４２、No.2角度検出手段４２が型本体６２の成形凹部６２ｆにセットされると、第１の型６０（型本体６２と押え型６４）の型締め後、型内に樹脂が射出されて第1樹脂成形部５２が成形される。
即ち、型本体６２の成形凹部６２ｆの誤セット防止用突起６２ｐ、及び一対の段部６２ｄが本発明の位置決め用凸部に相当する。また、型本体６２の成形凹部６２ｆに位置決め用凸部が設けられるため、第1樹脂成形部５２の表面には、位置決め用凸部により凹部５２ｄ，５２ｐが形成される（図６、図７参照）。 As shown in FIG. 3, the No. 2 angle detection means 42 is positioned on the opposite side of the No. 1 angle detection means 42 across the virtual center line L of the molding recess 62f of the mold body 62. The No. 2 angle detection means 42 is set in the molding recess 62f so that the magnetic detection element 45 is superimposed on the magnetic detection element 45 of the No. 1 angle detection means 42. In this state, the exposed portions of the L-shaped conductors 49a, 49b, 49c of the No. 2 angle detecting means 42 are respectively fitted with the three recessed portions 62x formed on the opening edge of the molded recessed portion 62f. FIG. 3 shows a state in which the No. 2 angle detection means 42 is being set.
Further, an erroneous set prevention projection 62p is formed on the bottom of the molding recess 62f of the mold body 62 so as to protrude in the axial direction (opening side) from the stepped portion 62d. The No. 2 angle detection means 42 set in the molding recess 62f of the die body 62 is in contact with the tip of the erroneous set prevention projection 62p. As a result, when the No. 1 angle detection means 42 is mistakenly inserted into the set position side of the No. 2 angle detection means 42, the No. 1 angle detection means 42 comes into contact with the erroneous set prevention projection 62p. It cannot be set in the part 62d. That is, the No. 1 angle detection means 42 is set poorly, and erroneous assembly can be prevented.
In this way, when the No. 1 angle detection means 42 and the No. 2 angle detection means 42 are set in the molding recess 62f of the mold body 62, the mold of the first mold 60 (the mold body 62 and the presser mold 64) is formed. After the fastening, the resin is injected into the mold, and the first resin molding portion 52 is molded.
That is, the erroneous set prevention projection 62p of the molding recess 62f of the mold body 62 and the pair of stepped portions 62d correspond to the positioning projections of the present invention. Moreover, since the positioning convex portion is provided in the molding concave portion 62f of the mold body 62, concave portions 52d and 52p are formed on the surface of the first resin molding portion 52 by the positioning convex portion (see FIGS. 6 and 7). ).

第1樹脂成形部５２が成形されると、型開きが行なわれて第1樹脂成形部５２が型本体６２から取り出される。ここで、第1樹脂成形部５２は、図５に示すように、側面カバー５０の内壁面から突出する突出部位５２４と、その側面カバー５０に埋め込まれる埋設部位５２２（図８参照）と、埋設部位５２２と突出部位５２４との境界に位置する境界部位５２３とを備えている。そして、突出部位５２４と埋設部位５２２とに先端側が細くなるようなテーパが設けられている。これによって、第1樹脂成形部５２を型本体６２から容易に取り出せるようになる。
ここで、第1樹脂成形部５２を構成する樹脂材には、角度検出手段４２に使用されているエポキシ樹脂が好適に使用される。このように、角度検出手段４２に使用されている樹脂材と第1樹脂成形部５２を構成する樹脂材とがほぼ等しい線膨張係数を備えているため、周辺温度の変化により第１樹脂成形部５２と角度検出手段４２とが伸縮した場合に、角度検出手段４２に加わる応力を小さくすることができる。 When the first resin molding part 52 is molded, the mold is opened and the first resin molding part 52 is taken out from the mold body 62. Here, as shown in FIG. 5, the first resin molding portion 52 includes a protruding portion 524 protruding from the inner wall surface of the side cover 50, an embedded portion 522 (see FIG. 8) embedded in the side cover 50, and an embedded portion. A boundary portion 523 located at the boundary between the portion 522 and the protruding portion 524 is provided. And the taper which the front end side becomes thin is provided in the protrusion site | part 524 and the embedding site | part 522. FIG. As a result, the first resin molding portion 52 can be easily removed from the mold body 62.
Here, an epoxy resin used for the angle detection means 42 is preferably used as the resin material constituting the first resin molding portion 52. As described above, since the resin material used for the angle detection means 42 and the resin material constituting the first resin molding portion 52 have substantially the same linear expansion coefficient, the first resin molding portion is caused by a change in the ambient temperature. When 52 and the angle detection means 42 expand and contract, the stress applied to the angle detection means 42 can be reduced.

第1樹脂成形部５２の成形が完了すると、図６、図７に示すように、その第1樹脂成形部５２の埋設部位５２２から露出した２本の電源用のＬ形導体４９ａが、電源用導体５３ａの一端部に接続される。また、同じく第1樹脂成形部５２から突出した２本の接地用のＬ形導体４９ｂが接地用導体５３ｂの一端部に接続され、２本の信号出力用のＬ形導体４９ｃがそれぞれ第１信号用導体５３ｅ、第２信号用導体５３ｆの一端部に接続される。
電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆは、側面カバー５０に設けられるコネクタ５５用の導体であり、端子部Ｔ（先端部）を除く部分が側面カバー５０の壁内に埋め込まれる。 When the molding of the first resin molding part 52 is completed, as shown in FIGS. 6 and 7, the two L-shaped conductors 49a for power supply exposed from the embedded portion 522 of the first resin molding part 52 are used for power supply. Connected to one end of the conductor 53a. Similarly, two L-shaped conductors 49b for grounding projecting from the first resin molding portion 52 are connected to one end of the grounding conductor 53b, and the two L-shaped conductors 49c for signal output are respectively the first signal. The first conductor 53e is connected to one end of the second signal conductor 53f.
The power supply conductor 53a, the grounding conductor 53b, and the first and second signal conductors 53e and 53f are conductors for the connector 55 provided on the side cover 50, and the portion excluding the terminal portion T (tip portion) is the side surface. Embedded in the wall of the cover 50.

＜側面カバー５０の成形について＞
側面カバー５０は、第２の型７０により成形される。第２の型７０は、図８（Ａ）に示すように、内面成形型７２と外側成形型７４とから構成されている。内面成形型７２は、側面カバー５０の内面側を成形する型であり、第1樹脂成形部５２の突出部位５２４と境界部位５２３とが嵌め込まれる円筒形の凹部７２ｈが所定位置に設けられている。外側成形型７４は側面カバー５０の表面及びコネクタ５５を成形する型であり、複数に分割可能に構成されている。なお、図８（Ａ）には、電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆは省略されている。
先ず、第２の型７０が型開きされている状態で、第1樹脂成形部５２の突出部位５２４と境界部位５２３とが内面成形型７２の円筒形の凹部７２ｈに嵌め込まれる。次に、第1樹脂成形部５２のＬ形導体４９ａ，４９ｂ，４９ｃに接続された電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆが所定位置に位置決めされる。 <About molding of side cover 50>
The side cover 50 is formed by the second mold 70. As shown in FIG. 8A, the second mold 70 is composed of an inner mold 72 and an outer mold 74. The inner surface molding die 72 is a die for molding the inner surface side of the side cover 50, and a cylindrical recess 72h into which the protruding portion 524 and the boundary portion 523 of the first resin molding portion 52 are fitted is provided at a predetermined position. . The outer mold 74 is a mold for molding the surface of the side cover 50 and the connector 55, and is configured to be divided into a plurality of parts. In FIG. 8A, the power supply conductor 53a, the grounding conductor 53b, and the first and second signal conductors 53e and 53f are omitted.
First, the protruding portion 524 and the boundary portion 523 of the first resin molding portion 52 are fitted into the cylindrical recess 72 h of the inner surface molding die 72 in a state where the second die 70 is opened. Next, the power supply conductor 53a, the grounding conductor 53b, and the first and second signal conductors 53e and 53f connected to the L-shaped conductors 49a, 49b, and 49c of the first resin molding portion 52 are positioned at predetermined positions. The

このとき、第1樹脂成形部５２が略円柱形に成形されているため、第1樹脂成形部５２が内面成形型７２の凹部７２ｈに対して軸心回りに回動可能であり、電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆの位置合わせが容易になる。
このようにして、第1樹脂成形部５２、電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆが第２の型７０の所定位置にセットされると、第２の型７０の型締めが行なわれ、型内に樹脂が射出されて側面カバー５０が成形される。そして、側面カバー５０の成形と同時に、第1樹脂成形部５２が、図５に示すように、側面カバー５０の内面所定位置に固定される。ここで、側面カバー５０の樹脂材としては、例えば、ポリブチレンテレフタレート（ＰＢＴ）樹脂やポリフェニンサルファイド（ＰＰＳ）樹脂が好適に使用される。
側面カバー５０のコネクタ５５には、エンジンコントロールユニット（ＥＣＵ）側の電線のコネクタが接続される。これにより、角度検出手段４２の出力、即ち、スロットルシャフト１６の回転角度信号が前記ＥＣＵに入力される。
即ち、側面カバー５０が本発明の第２樹脂成形部に相当し、その側面カバー５０に第1樹脂成形部５２が固定されたものが本発明の固定部に相当する。また、第1樹脂成形部５２から露出するＬ形導体４９ａ，４９ｂ，４９ｃが本発明の第１導体に相当し、電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆが本発明の第２導体に相当する。 At this time, since the first resin molding portion 52 is formed in a substantially cylindrical shape, the first resin molding portion 52 can rotate around the axis with respect to the recess 72 h of the inner surface molding die 72, and the power supply conductor 53a, the grounding conductor 53b, and the first and second signal conductors 53e and 53f can be easily aligned.
In this way, when the first resin molding portion 52, the power source conductor 53a, the ground conductor 53b, and the first and second signal conductors 53e and 53f are set at predetermined positions of the second mold 70, The second mold 70 is clamped and resin is injected into the mold to mold the side cover 50. Simultaneously with the molding of the side cover 50, the first resin molding portion 52 is fixed at a predetermined position on the inner surface of the side cover 50 as shown in FIG. Here, as a resin material of the side cover 50, for example, a polybutylene terephthalate (PBT) resin or a polyphenine sulfide (PPS) resin is preferably used.
An electric wire connector on the engine control unit (ECU) side is connected to the connector 55 of the side cover 50. Thereby, the output of the angle detection means 42, that is, the rotation angle signal of the throttle shaft 16 is input to the ECU.
That is, the side cover 50 corresponds to the second resin molded portion of the present invention, and the side cover 50 having the first resin molded portion 52 fixed to the side cover 50 corresponds to the fixed portion of the present invention. The L-shaped conductors 49a, 49b, 49c exposed from the first resin molding portion 52 correspond to the first conductor of the present invention, and include a power supply conductor 53a, a grounding conductor 53b, and first and second signal conductors 53e. , 53f correspond to the second conductor of the present invention.

＜本実施形態に係る回転角度検出装置４０の長所について＞
本実施形態に係る回転角度検出装置４０によると、第１樹脂成形部５２は、電気接続端子４７ａ，４７ｂ，４７ｃ、角度検出手段４２、及びＬ形導体４９ａ，４９ｂ，４９ｃの一端部とを第１の型６０内にインサートし、その第１の型６０に樹脂を射出することにより成形される。即ち、電気接続端子４７ａ，４７ｂ，４７ｃ、角度検出手段４２、及びＬ形導体４９ａ，４９ｂ，４９ｃの一端部とが樹脂によって固められている。このため、電気接続端子４７ａ，４７ｂ，４７ｃの強度が低い場合でも電気接続端子４７ａ，４７ｂ，４７ｃが変形等することがなく、角度検出手段４２は第１樹脂成形部５２によってＬ形導体４９ａ，４９ｂ，４９ｃに対して一定の位置関係に保持される。
さらに、側面カバー５０（第２樹脂成形部）は、第１樹脂成形部５２から突出したＬ形導体４９ａ，４９ｂ，４９ｃと、Ｌ形導体４９ａ，４９ｂ，４９ｃに接続された電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆ（以下、導体という）を第２の型７０内にインサートした状態で型成形されている。このように、第１樹脂成形部５２により導体に対して位置ずれしないように角度検出手段４２を固定した状態で、それらの導体を第２の型７０内にインサートするため、角度検出手段４２が側面カバー５０（第２樹脂成形部）に対して位置ずれを起こすことがない。即ち、製造途中で角度検出手段が位置ずれを起こすことがないため、回転角度検出装置４０の製造不良を防止できるようになる。 <Advantages of the rotation angle detection device 40 according to the present embodiment>
According to the rotation angle detection device 40 according to the present embodiment, the first resin molding portion 52 includes the electrical connection terminals 47a, 47b, 47c, the angle detection means 42, and one end portions of the L-shaped conductors 49a, 49b, 49c. The molding is performed by inserting into one mold 60 and injecting resin into the first mold 60. That is, the electrical connection terminals 47a, 47b, 47c, the angle detection means 42, and one end portions of the L-shaped conductors 49a, 49b, 49c are fixed with resin. For this reason, even if the strength of the electrical connection terminals 47a, 47b, 47c is low, the electrical connection terminals 47a, 47b, 47c are not deformed, and the angle detection means 42 is provided with the L-shaped conductors 49a, 49a by the first resin molding portion 52. It is held in a fixed positional relationship with respect to 49b and 49c.
Further, the side cover 50 (second resin molding part) includes L-shaped conductors 49a, 49b, 49c protruding from the first resin molding part 52, and power supply conductors 53a connected to the L-shaped conductors 49a, 49b, 49c, Molding is performed with the grounding conductor 53b and the first and second signal conductors 53e and 53f (hereinafter referred to as conductors) inserted into the second mold 70. As described above, the angle detection means 42 is inserted into the second mold 70 in a state where the angle detection means 42 is fixed so as not to be displaced with respect to the conductor by the first resin molding portion 52. There is no position shift with respect to the side cover 50 (second resin molding portion). That is, since the angle detecting means does not cause a position shift during the manufacturing, it is possible to prevent a manufacturing defect of the rotation angle detecting device 40.

また、第１樹脂成形部５２を構成する樹脂材と、角度検出手段４２に使用される樹脂材とは、略同一の線膨張係数を備えているため、周辺温度の変化により第１樹脂成形部５２と角度検出手段４２とが伸縮した場合でも、角度検出手段４２に加わる応力を小さくすることができる。
また、第１樹脂成形部５２の突出部位５２４と埋設部位５２２には、その突出部位５２４の先端に近づくにつれて細くなるようなテーパが設けられているため、成形後に第１樹脂成形部５２を第１の型６０の型本体６２から外し易くなる。
さらに、第１樹脂成形部５２の境界部位５２３には一定幅でテーパが設けられていないため、第２の型７０内に第１樹脂成形部５２の埋設部位５２２がインサートされた状態で、第２の型７０と第１樹脂成形部５２の境界部位５２３との間に隙間が形成され難くなる。これにより、側面カバー５０（第２樹脂成形部）が成形される際に、その側面カバー５０と第１樹脂成形部５２の境界部位との間にバリが生じ難くなる。
また、導体をＬ形導体４９ａ，４９ｂ，４９ｃ（第１導体）と、電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆ（第２導体）とに分割できるため、第１樹脂成形部５２を共通にして、側面カバー５０（第２樹脂成形部）を種々に変更し、多種類の固定部（第１樹脂成形部５２付き側面カバー５０）を製作できるようになる。
また、第１樹脂成形部５２は略円柱形に成形されているため、第１樹脂成形部５２の埋設部位、及び導体を第２の型７０内にインサートする際に、第１樹脂成形部５２を中心にして導体を回転方向に変位させられるようになり、導体の位置決めが容易になる。 Moreover, since the resin material which comprises the 1st resin molding part 52 and the resin material used for the angle detection means 42 are equipped with the substantially same linear expansion coefficient, it is the 1st resin molding part by the change of ambient temperature. Even when 52 and the angle detection means 42 expand and contract, the stress applied to the angle detection means 42 can be reduced.
Further, since the protruding portion 524 and the embedded portion 522 of the first resin molding portion 52 are provided with a taper that becomes thinner as the tip of the protruding portion 524 is approached, the first resin molding portion 52 is formed after the molding. It becomes easy to remove from the mold body 62 of the first mold 60.
Further, since the boundary portion 523 of the first resin molding portion 52 is not provided with a taper with a constant width, the first portion of the first resin molding portion 52 is inserted in the second mold 70 in the state where the first portion is inserted. It is difficult to form a gap between the second mold 70 and the boundary portion 523 of the first resin molding portion 52. Thereby, when the side cover 50 (second resin molding portion) is molded, burrs are hardly generated between the side cover 50 and the boundary portion of the first resin molding portion 52.
Further, the conductor can be divided into L-shaped conductors 49a, 49b, 49c (first conductor), power supply conductor 53a, grounding conductor 53b, and first and second signal conductors 53e, 53f (second conductor). Therefore, the side cover 50 (second resin molding part) can be changed variously by using the first resin molding part 52 in common, so that various types of fixing parts (side cover 50 with the first resin molding part 52) can be manufactured. become.
Moreover, since the 1st resin molding part 52 is shape | molded by the substantially cylindrical shape, when inserting the embedding site | part of the 1st resin molding part 52 and a conductor in the 2nd type | mold 70, the 1st resin molding part 52 is carried out. As a result, the conductor can be displaced in the rotation direction with respect to the center, and positioning of the conductor becomes easy.

＜変更例＞
ここで、本発明は上記実施形態に限定されるものではなく、本発明の要旨を逸脱しない範囲における変更が可能である。例えば、本実施形態の角度検出手段４２は、永久磁石４１間の磁界の方向に基づいてスロットルバルブ１８の回転角度を求める構成であるが、前記磁界の強さに基づいてスロットルバルブ１８の回転角度を求める構成でも可能である。
また、磁気検出素子４５と演算部４６とから構成された角度検出手段４２を使用する例を示したが、磁気検出素子４５と演算部４６とが一体化された磁気検出素子４５を使用することも可能である。
また、導体をＬ形導体４９ａ，４９ｂ，４９ｃ（第１導体）と、電源用導体５３ａ、接地用導体５３ｂ、及び第１、第２信号用導体５３ｅ，５３ｆ（第２導体）とに分割する構成を例示したが、第１導体と第２導体とを一体化することも可能である。
また、本実施形態では、回転角度検出装置４０でスロットル制御装置１０のスロットルシャフト１６の回転角度を検出する例を示したが、スロットル制御装置１０以外にも適用可能である。例えば、液体用の流量調節弁の開度検出用として本発明に係る回転角度検出装置４０を使用することも可能である。
また、角度検出手段４２を二台一組で使用する例を示したがフェールセーフを考慮しなくても良い場合には、角度検出手段４２を一台で使用することも可能である。 <Example of change>
Here, the present invention is not limited to the above-described embodiment, and can be modified without departing from the gist of the present invention. For example, the angle detection means 42 of the present embodiment is configured to obtain the rotation angle of the throttle valve 18 based on the direction of the magnetic field between the permanent magnets 41, but the rotation angle of the throttle valve 18 based on the strength of the magnetic field. It is also possible to have a configuration that requires
Moreover, although the example which uses the angle detection means 42 comprised from the magnetic detection element 45 and the calculating part 46 was shown, using the magnetic detecting element 45 with which the magnetic detection element 45 and the calculating part 46 were integrated. Is also possible.
The conductor is divided into L-shaped conductors 49a, 49b, 49c (first conductor), power supply conductor 53a, grounding conductor 53b, and first and second signal conductors 53e, 53f (second conductor). Although the configuration has been illustrated, the first conductor and the second conductor can be integrated.
In the present embodiment, an example in which the rotation angle detection device 40 detects the rotation angle of the throttle shaft 16 of the throttle control device 10 has been described, but the present invention can be applied to devices other than the throttle control device 10. For example, it is also possible to use the rotation angle detection device 40 according to the present invention for detecting the opening degree of a flow control valve for liquid.
Moreover, although the example which uses the angle detection means 42 by 2 units | sets was shown, when it is not necessary to consider fail safe, it is also possible to use the angle detection means 42 by 1 unit | set.

本発明の実施形態１に係る回転角度検出装置を備えるスロットル制御装置の平断面図である。It is a plane sectional view of a throttle control device provided with a rotation angle detection device concerning Embodiment 1 of the present invention. 回転角度検出装置の測定原理を表す正面図（Ａ図）、及び縦断面図（Ｂ図）である。It is the front view (A figure) showing the measurement principle of a rotation angle detection apparatus, and a longitudinal cross-sectional view (B figure). 第１樹脂成形部の製造方法を表す縦断面図である。It is a longitudinal section showing the manufacturing method of the 1st resin fabrication part. 図３のIV-IV矢視断面図である。FIG. 4 is a cross-sectional view taken along the line IV-IV in FIG. 3. 第１樹脂成形部付き側面カバーを表す斜視図である。It is a perspective view showing a side cover with the 1st resin fabrication part. 第１樹脂成形部のＬ形導体と、電源用導体、接地用導体、及び第１、第２信号用導体との接続を表す斜視図である。It is a perspective view showing the connection of the L-shaped conductor of a 1st resin molding part, the power supply conductor, the grounding conductor, and the 1st, 2nd signal conductor. 第１樹脂成形部のＬ形導体と、電源用導体、接地用導体、及び第１、第２信号用導体との接続を表す平面図である。It is a top view showing the connection of the L-shaped conductor of a 1st resin molding part, the conductor for power supplies, the conductor for grounding, and the 1st, 2nd signal conductor. 側面カバーの製造方法を表す縦断面図（Ａ図）、及びＡ図のＢ部拡大図（Ｂ図）である。It is the longitudinal cross-sectional view (A figure) showing the manufacturing method of a side cover, and the B section enlarged view (B figure) of A figure. 従来の回転角度検出装置の製造手順を表す側面図（Ａ図）、（Ｂ図）である。It is a side view (A figure) and (B figure) showing the manufacture procedure of the conventional rotation angle detection apparatus.

Explanation of symbols

１６スロットルシャフト（回転部）
１８スロットルバルブ
４１永久磁石
４２角度検出手段
４５磁気検出素子
４６演算部
４７ａ，４７ｂ，４７ｃ電気接続端子
４９ａ，４９ｂ，４９ｃＬ形導体（第１導体）
５０側面カバー（第２樹脂成形部）
５２第１樹脂成形部
５５コネクタ
５２２埋設部位
５２３境界部位
５３４突出部位
５３ａ電源用導体（第２導体）
５３ｂ接地用導体（第２導体）
５３ｅ第１信号用導体（第２導体）
５３ｆ第２信号用導体（第２導体）
６０第１の型
６２ｄ段部（位置決め用凸部）
６２ｐ誤セット防止用突起（位置決め用凸部）
７０第２の型
16 Throttle shaft (rotating part)
18 Throttle valve 41 Permanent magnet 42 Angle detection means 45 Magnetic detection element 46 Calculation units 47a, 47b, 47c Electrical connection terminals 49a, 49b, 49c L-shaped conductor (first conductor)
50 Side cover (second resin molding part)
52 1st resin molding part 55 Connector 522 Embedded part 523 Boundary part 534 Protrusion part 53a Power supply conductor (second conductor)
53b Grounding conductor (second conductor)
53e First signal conductor (second conductor)
53f Second signal conductor (second conductor)
60 1st type | mold 62d Step part (convex part for positioning)
62p Protrusion for preventing incorrect set (convex part for positioning)
70 second mold

Claims

At least a pair of permanent magnets that are attached to the rotating part and are opposed to each other across the center of rotation, and positioned between the permanent magnets in a state of being attached to the fixed part, and accompanying the rotation of the rotating part Angle detecting means for obtaining a rotation angle of the rotating portion based on a change in the magnetic field between the permanent magnets, a connector provided in the fixed portion, and electrically connecting the angle detecting means and an external device; A rotation angle detection device comprising:
A plurality of electrical connection terminals of the angle detection means are respectively connected to one end portions of a plurality of conductors having strength greater than those electrical connection terminals, and the other end side of these conductors is used as a terminal of the connector. The configuration
At least the electrical connection terminal, a part of the angle detection means, and one end of the conductor connected to the electrical connection terminal are inserted into a first mold, and a resin is molded by the first mold. A first resin molding part obtained by
Inserting the conductor protruding from the first resin molding part into a second mold, and having a second resin molding part obtained by molding a resin with the second mold,
The fixing unit is composed of the first resin molded portion and the second resin molded portion, and said connector Ru is formed configured to the second resin molded portion,
The first resin molding part is provided with a constant width between an embedded part inserted into the second mold, a protruding part protruding from the second mold, and the embedded part and the protruding part. A boundary part,
A rotation angle detecting device, wherein the protruding portion and the embedded portion are provided with a taper that becomes thinner as the tip of the protruding portion is approached, and the boundary portion is not provided with a taper .

The rotation angle detection device according to claim 1,
The rotation angle detection device is characterized in that the angle detection means is configured to obtain the rotation angle of the rotation unit based on the direction of the magnetic field between the permanent magnets.

A rotation angle detection device according to claim 1 or 2,
The angle detection means includes a magnetic detection element that detects a change in the magnetic field between the permanent magnets in the rotation unit, and a calculation unit that calculates the rotation angle of the rotation unit based on an output signal of the magnetic detection element. A rotation angle detecting device.

The rotation angle detection device according to any one of claims 1 to 3,
The rotation angle detection apparatus characterized by the resin material which comprises a 1st resin molding part, and the resin material used for the angle detection means being equipped with the substantially same linear expansion coefficient.

The rotation angle detection device according to any one of claims 1 to 4,
The linear expansion coefficient of the resin material constituting the first resin molding part is greater than the linear expansion coefficient of the resin material constituting the second resin molding part, than the linear expansion coefficient of the resin material used in the angle detection means. A rotation angle detection device characterized by being close to.

The rotation angle detection device according to any one of claims 1 to 5,
The conductor connecting the electrical connection terminal of the angle detection means and the connector is divided into a first conductor embedded in the first resin molding part and a second conductor constituting the terminal of the connector,
Rotation angle detection characterized in that a first conductor projecting from a first resin molding part, a coupling portion between the first conductor and the second conductor, and the second conductor are embedded in the second resin molding part apparatus.

The rotation angle detection device according to any one of claims 1 to 6,
The rotation angle detection device, wherein the first resin molding part is formed in a substantially cylindrical shape.

The rotation angle detection device according to any one of claims 1 to 7,
A rotation angle detection device characterized in that a recess reaching the angle detection means is formed on the surface of the first resin molding part.

The rotation angle detection device according to any one of claims 1 to 8,
The rotation angle detection device according to claim 1, wherein the rotation portion is a shaft of intake air amount control means provided in an intake passage of the internal combustion engine, and the fixed portion is a case of intake air amount control means.