JP2009098005A - Position detector - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a position detector capable of improving accuracy of a positional detection of a moving member. <P>SOLUTION: A magnetic head is configured such that a pair of magnets 5 are disposed between a pair of magnetic bodies 4 having facets facing each other, and the pair of magnetic bodies 4 and the pair of magnets 5 form a closed magnetic circuit. The moving member 3 moves the magnetic head in accordance with an operation value from an operating means 2. A magnetic detector 6 is disposed inside the closed magnetic circuit of the magnetic head and detects a change in a leakage field taking place inside the closed magnetic circuit along with a movement of the moving member 3. The moving member 3 and the magnetic head are made up separately. A cushioning member 4c is disposed in a gap C between the moving member 3 and the magnetic head. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、二輪車や自動車を代表とする各種車両に搭載される操作手段の操作位置（回動角）をホールＩＣ等からなる磁気検出体にて検出する非接触式の位置検出器に関するものである。   The present invention relates to a non-contact type position detector that detects an operation position (rotation angle) of an operation means mounted on various vehicles such as two-wheeled vehicles and automobiles with a magnetic detector composed of a Hall IC or the like. is there.

従来、この種の非接触式の位置検出器にあっては、例えば特許文献１に記載されているものが知られている。この特許文献１に記載の位置検出器は、略半円弧状に形成される第１磁性体と、前記第１磁性体を取り巻くように前記第１磁性体と対向配置され前記第１磁性体と同心円状の第２磁性体と、前記第１，第２磁性体間に形成される空隙部の両端に閉磁気回路を形成すべく配設された磁界（Ｎ極、Ｓ極）方向が同一な２つの永久磁石とを備え、前記空隙部（前記閉磁気回路の内部）に生じる漏洩磁界を検出するように前記閉磁気回路の内部にホール素子等の検出素子を配設し、被検出体の回動（操作手段の回動操作）に応じて前記検出素子が前記空隙部を移動し前記漏洩磁界を検出することで、前記検出素子からの出力より前記被検出体（前記操作手段）の回動角を検出するものであった。
特公平６−６３７６９号公報 Conventionally, as this kind of non-contact type position detector, for example, the one described in Patent Document 1 is known. The position detector described in Patent Document 1 includes a first magnetic body formed in a substantially semicircular arc shape, and the first magnetic body disposed to face the first magnetic body so as to surround the first magnetic body. The direction of the magnetic field (N pole, S pole) disposed to form a closed magnetic circuit at both ends of the gap formed between the concentric second magnetic body and the first and second magnetic bodies is the same. Two permanent magnets, and a detection element such as a Hall element is arranged inside the closed magnetic circuit so as to detect a leakage magnetic field generated in the gap (inside the closed magnetic circuit). The detection element moves in the gap and detects the leakage magnetic field in response to rotation (rotation operation of the operation means), so that the detected object (the operation means) rotates from the output from the detection element. The moving angle was detected.
Japanese Examined Patent Publication No. 6-63769

特許文献１に記載された非接触式の位置検出器においては、操作手段の回動角の全範囲にわたって前記検出素子からの出力変化が直線性（以下、リニアリティと記す）を有することが検出精度の向上のために好ましく、そのためリニアリティの改善が求められている。しかしながら、特許文献１記載の位置検出器の場合、第１磁性体とこの第１磁性体の外側に位置する第２磁性体とが、ともに略半円弧状に形成され、各磁性体とで閉磁気回路を構成する２つの永久磁石が、前記各磁性体の間に形成される空隙部の両端に配設される構成となっていることから、前記各磁性体並びに前記各永久磁石製作時の加工精度のバラツキにより、略半円弧状の前記各磁性体が、これらの間に位置する前記各永久磁石と部分的に当接（面接触）しない状態で配設されてしまうことがあった。   In the non-contact type position detector described in Patent Document 1, it is detected that the output change from the detection element has linearity (hereinafter referred to as linearity) over the entire range of the rotation angle of the operation means. Therefore, improvement of linearity is required. However, in the case of the position detector described in Patent Document 1, the first magnetic body and the second magnetic body located outside the first magnetic body are both formed in a substantially semicircular arc shape, and are closed by each magnetic body. Since the two permanent magnets constituting the magnetic circuit are arranged at both ends of the gap formed between the magnetic bodies, the magnetic bodies and the permanent magnets are manufactured at the time of manufacture. Due to variations in processing accuracy, the substantially semicircular arc-shaped magnetic bodies may be disposed in a state where they do not partially abut (surface contact) with the permanent magnets positioned therebetween.

このことは、前記第１磁性体の外側円弧面とこれに対応する前記各永久磁石の一方の面、及び前記第２磁性体の内側円弧面とこれに対向する前記各永久磁石の他方の面とが全領域で密着しないことを意味している。例えば、２つの前記永久磁石のうち、一方の永久磁石が、前記第１，第２磁性体と全領域で面接触し、他方の永久磁石が、前記第１，第２磁性体のうち少なくとも１つと全領域で面接触せずに部分的に非接触状態となった場合には、前記閉磁気回路の内部に漏洩する前記漏洩磁界の磁力は、前記非接触状態の存在する前記他方の永久磁石側が、前記非接触状態の存在しない前記一方の永久磁石側よりも弱くなる。   This is because the outer arc surface of the first magnetic body and one surface of each permanent magnet corresponding to the outer arc surface, and the other arc surface of the second magnetic body and the other surface of each permanent magnet facing it. Means that it does not adhere in all areas. For example, one of the two permanent magnets is in surface contact with the first and second magnetic bodies in the entire region, and the other permanent magnet is at least one of the first and second magnetic bodies. When the magnetic field of the leakage magnetic field that leaks into the closed magnetic circuit is partially in a non-contact state without surface contact in the entire region, the other permanent magnet in the non-contact state exists. The side becomes weaker than the one permanent magnet side where the non-contact state does not exist.

従って、前記操作手段の全回動範囲にわたって前記操作手段を回動させた場合、前記操作手段の回動に同期して前記検出素子が回動することになるが、この際、所定角度回動する前記操作手段の回動角と、前記操作手段の回動に同期して回動する前記検出素子により検出される出力（出力電圧）との関係（出力特性）は、前記一方の永久磁石側と前記他方の永久磁石側とで前記漏洩磁界の磁力が若干異なることに起因して、リニアリティを有する出力特性を得ることができず、良好な検出精度が得られないという問題があった。   Therefore, when the operation means is rotated over the entire rotation range of the operation means, the detection element is rotated in synchronization with the rotation of the operation means. The relationship (output characteristic) between the rotation angle of the operating means and the output (output voltage) detected by the detection element rotating in synchronization with the rotation of the operating means is the one permanent magnet side Due to the fact that the magnetic force of the leakage magnetic field is slightly different on the other permanent magnet side, there is a problem that output characteristics having linearity cannot be obtained and good detection accuracy cannot be obtained.

そこで、本願出願人は、磁気ヘッドに備えられた磁性体の幅を漸次異ならせることによってリニアリティを向上させた位置検出器を特願２００７−２５９５８１として提案している。しかし、斯かる位置検出器は、移動部材に磁気発生源が備えられたものであり、このような構造の磁気の変化を磁気検出素子によって検出すると、移動部材のスラスト方向のガタツキが誤差として出力に影響するため、位置検出の精度が悪化してしまうという問題を有しており、更なる改良の余地があった。
本発明は、移動部材の位置検出精度を向上させることが可能な位置検出装置を提供することを目的とするものである。 Therefore, the applicant of the present application has proposed as a Japanese Patent Application No. 2007-259581 a position detector in which the linearity is improved by gradually varying the width of the magnetic body provided in the magnetic head. However, in such a position detector, the moving member is provided with a magnetic source, and when the magnetic change of such a structure is detected by the magnetic detection element, the backlash in the thrust direction of the moving member is output as an error. Therefore, there is a problem that the accuracy of position detection deteriorates, and there is room for further improvement.
An object of this invention is to provide the position detection apparatus which can improve the position detection precision of a moving member.

本発明は、請求項１に記載したように、対向面を有する一対の磁性体間に一対の磁石を配設し、前記一対の磁性体と前記一対の磁石とで閉磁気回路を形成してなる磁気ヘッドと、操作手段の操作量に応じて前記磁気ヘッドを移動させる移動部材と、前記磁気ヘッドにおける前記閉磁気回路の内部に配設され、前記移動部材の移動に伴い前記閉磁気回路の内部に生じる漏洩磁界の変化を検出する磁気検出体と、を備えた位置検出器において、前記移動部材と前記磁気ヘッドとは別体からなるものである。   According to the first aspect of the present invention, a pair of magnets is disposed between a pair of magnetic bodies having opposing surfaces, and a closed magnetic circuit is formed by the pair of magnetic bodies and the pair of magnets. And a moving member that moves the magnetic head in accordance with the amount of operation of the operating means, and is disposed inside the closed magnetic circuit in the magnetic head. In the position detector including a magnetic detector that detects a change in the leakage magnetic field generated inside, the moving member and the magnetic head are separate.

また、本発明は、請求項２に記載したように、前記移動部材と前記磁気ヘッドとの間に緩衝部材を配設してなるものである。   Further, according to the present invention, a buffer member is disposed between the moving member and the magnetic head.

また、本発明は、請求項３に記載したように、前記緩衝部材は、板バネであるものである。   According to a third aspect of the present invention, the buffer member is a leaf spring.

請求項１に記載の発明は、移動部材と磁気ヘッドと別体とすることで、磁気ヘッドに移動部材のスラスト方向のガタツキを伝えないようにすることができ、位置検出精度を向上させることができる。   According to the first aspect of the present invention, by providing the moving member and the magnetic head separately, it is possible to prevent the magnetic head from transmitting backlash in the thrust direction of the moving member, and to improve the position detection accuracy. it can.

請求項２に記載の発明は、移動部材と磁気ヘッドの間に緩衝部材を配設することで、移動部材と磁気ヘッドの隙間を補い、磁気ヘッドの移動方向のガタツキを抑えることができ、位置検出精度を向上させることができる。   According to the second aspect of the present invention, the buffer member is disposed between the moving member and the magnetic head, so that the gap between the moving member and the magnetic head can be compensated to prevent the magnetic head from moving in the moving direction. Detection accuracy can be improved.

請求項３に記載の発明は、緩衝部材を板バネとすることで、移動部材と磁気ヘッドの隙間が狭くても緩衝部材を配設することができる。   According to the third aspect of the present invention, since the buffer member is a leaf spring, the buffer member can be disposed even if the gap between the moving member and the magnetic head is narrow.

以下、添付図面に基づいて、二輪車に搭載されるハンドルバーに回動可能に設けられた操作グリップの操作量（回動角）を検出する位置検出器に本発明を適用した一実施形態を説明する。   Hereinafter, an embodiment in which the present invention is applied to a position detector that detects an operation amount (rotation angle) of an operation grip rotatably provided on a handle bar mounted on a motorcycle will be described with reference to the accompanying drawings. To do.

位置検出器は、ハンドルバー１に回動可能に取り付けられた操作グリップ（操作手段）２と、この操作グリップ２の回動操作に同期して回動する移動部材３と、一対の磁性体４と、移動部材３に埋設され一対の磁性体４とで閉磁気回路を形成する一対の磁石５と、前記閉磁気回路の内部に配設され前記閉磁気回路の内部に生じる漏洩磁界を検出するための磁気検出体６と、この磁気検出体６の搭載された回路基板７と、磁性体４や磁石５等を収納する枠体８とから主に構成されている。   The position detector includes an operation grip (operation means) 2 that is rotatably attached to the handle bar 1, a moving member 3 that rotates in synchronization with the rotation operation of the operation grip 2, and a pair of magnetic bodies 4. And a pair of magnets 5 which are embedded in the moving member 3 and form a closed magnetic circuit with the pair of magnetic bodies 4, and a leakage magnetic field which is disposed inside the closed magnetic circuit and which is generated inside the closed magnetic circuit is detected. For this reason, the magnetic detection body 6 is mainly composed of a magnetic detection body 6, a circuit board 7 on which the magnetic detection body 6 is mounted, and a frame body 8 for storing the magnetic body 4, the magnet 5, and the like.

操作グリップ２は、ポリアセタール等の合成樹脂材料からなり、図２中、右方に位置する二輪車のハンドルバー１の外周部を覆うように取り付けられている。この場合、操作グリップ２は、移動部材３と一体的に形成されているため、操作グリップ２の操作量に応じて移動部材３が回動する構成となっている。なお、２ａは、枠体８側となる操作グリップ２の端部に形成された鍔部である。   The operation grip 2 is made of a synthetic resin material such as polyacetal and is attached so as to cover the outer peripheral portion of the handlebar 1 of the two-wheeled vehicle located on the right side in FIG. In this case, since the operation grip 2 is formed integrally with the moving member 3, the moving member 3 rotates according to the operation amount of the operation grip 2. In addition, 2a is a collar part formed in the edge part of the operation grip 2 used as the frame 8 side.

移動部材３は、合成樹脂材料からなり、ハンドルバー１を取り巻く略平板リング状に形成され、ハンドルバー１と枠体８との間に形成される空洞部Ｓに位置し、ハンドルバー１が挿通する挿通部３ａを有する円環部３ｂを備えている。円環部３ｂの外周部には、相対する位置に一対のフランジ部３ｃ，３ｄが形成されている。なお、３ｇは、操作グリップ２を通常位置に戻した際に、枠体８の後述する回動規制部と当接する当接面である。   The moving member 3 is made of a synthetic resin material, is formed in a substantially flat ring shape surrounding the handle bar 1, is located in a cavity S formed between the handle bar 1 and the frame body 8, and the handle bar 1 is inserted therethrough. The ring part 3b which has the insertion part 3a to perform is provided. A pair of flange portions 3c and 3d are formed on the outer peripheral portion of the annular portion 3b at opposing positions. In addition, 3g is a contact surface which contacts the rotation control part mentioned later of the frame 8 when the operation grip 2 is returned to a normal position.

磁性体４は、略平板からなる第１の磁性体４ａと、この第１の磁性体４ａと同一形状、同一板厚であって、第１の磁性体４ａとは所定の一定間隔を有して対向するように配設される第２の磁性体４ｂとからなる。各磁性体４ａ，４ｂは、ともに鉄等の金属材からなり、打ち抜き加工等により略半円環状に形成されている。磁性体４の一端部には、略Ｕ字形状に形成された金属材からなる緩衝部材である板バネ４ｃが溶着されている。   The magnetic body 4 has a first magnetic body 4a made of a substantially flat plate, the same shape and the same thickness as the first magnetic body 4a, and has a predetermined constant interval from the first magnetic body 4a. And a second magnetic body 4b disposed so as to face each other. Each of the magnetic bodies 4a and 4b is made of a metal material such as iron and is formed in a substantially semi-annular shape by punching or the like. A leaf spring 4c, which is a buffer member made of a metal material formed in a substantially U shape, is welded to one end of the magnetic body 4.

磁石５は、略円板状（略円柱形状）に成形された第１の磁石５ａと、この第１の磁石５と同一形状、同一板厚の第２の磁石５ｂとからなり、磁性体４の両端部に位置し、各磁石５ａ，５ｂの磁力（前記磁気的結合力）によって各磁性体４ａ，４ｂを磁気的に結合保持してなるものであり、各磁石５ａ，５ｂと各磁性体４ａ，４ｂとで磁気ヘッドを構成している。この磁気ヘッドは、移動部材３とは別体になっており、磁気ヘッドに移動部材３のスラスト方向のガタツキが伝わらないようになっている。磁性体４の一端部と移動部材のフランジ部３ｃの間には、若干の隙間Ｃがあるがこの隙間Ｃには緩衝部材である板バネ４ｃがあり、磁気ヘッドの回動方向のガタツキを抑えている。
なお、各磁石５ａ，５ｂは、例えばサマリウム−コバルト等の磁性材料からなり、各磁性体４ａ，４ｂ間においてＮ極、Ｓ極が互いに反対向きをなすように着磁されているため、各磁性体４ａ，４ｂと各磁石５ａ，５ｂとにより閉磁気回路が形成されることになる。 The magnet 5 includes a first magnet 5a formed in a substantially disc shape (substantially cylindrical shape), and a second magnet 5b having the same shape and thickness as the first magnet 5, and the magnetic body 4 The magnetic bodies 4a and 4b are magnetically coupled and held by the magnetic force (the magnetic coupling force) of the magnets 5a and 5b. The magnets 5a and 5b and the magnetic bodies 4a and 4b constitute a magnetic head. This magnetic head is separate from the moving member 3, and the thrust of the moving member 3 in the thrust direction is not transmitted to the magnetic head. There is a slight gap C between one end of the magnetic body 4 and the flange portion 3c of the moving member, but this gap C has a leaf spring 4c as a buffer member to suppress backlash in the rotating direction of the magnetic head. ing.
The magnets 5a and 5b are made of a magnetic material such as samarium-cobalt, and are magnetized so that the N and S poles are opposite to each other between the magnetic bodies 4a and 4b. A closed magnetic circuit is formed by the bodies 4a and 4b and the magnets 5a and 5b.

磁気検出体６は、ホールＩＣ，ＭＲ素子（半導体磁気抵抗素子）等の検出素子からなり、各磁性体４ａ，４ｂの間に位置しており、各磁性体４ａ，４ｂ並びにこれを磁気結合してなる各磁石５ａ，５ｂの回動に伴う前記漏洩磁界の変化を電気信号に変換し、かかる電気信号を後述する電気コードを通じて外部に出力するものである。なお、磁気検出体６は、磁石５の回動軌道上に配設されているものの、回動する磁石５と当接しない位置に配設されているため、磁石５と磁気検出体６とは接触しない構成となる。   The magnetic detection body 6 is composed of a detection element such as a Hall IC or MR element (semiconductor magnetoresistive element), and is positioned between the magnetic bodies 4a and 4b, and magnetically couples the magnetic bodies 4a and 4b and the magnetic bodies 4a and 4b. The change in the leakage magnetic field accompanying the rotation of the magnets 5a and 5b is converted into an electric signal, and the electric signal is output to the outside through an electric cord described later. In addition, although the magnetic detection body 6 is arrange | positioned on the rotation track | orbit of the magnet 5, since it is arrange | positioned in the position which does not contact | abut with the rotating magnet 5, the magnet 5 and the magnetic detection body 6 are the same. It becomes the structure which does not contact.

回路基板７は、ガラスエポキシ等の絶縁材料からなる略矩形状の基板に所定の配線パターンが形成されており、磁性体４の下方に配設され、磁気検出体６及びコンデンサ等からなる図示しない電子部品等が半田等により電気的に固定されている。かかる回路基板７には、磁気検出体６からの前記電気信号を図示しないエンジンコントロールユニットに伝達するための複数の電気コード９が備えられ、各電気コード９は、回路基板７の所定箇所に半田により電気的に接続され、前記エンジンコントロールユニットと接続される。   The circuit board 7 has a predetermined wiring pattern formed on a substantially rectangular substrate made of an insulating material such as glass epoxy, and is disposed below the magnetic body 4 and is not shown, which includes a magnetic detector 6 and a capacitor. Electronic parts and the like are electrically fixed by solder or the like. The circuit board 7 is provided with a plurality of electric cords 9 for transmitting the electric signal from the magnetic detector 6 to an engine control unit (not shown). Each electric cord 9 is soldered to a predetermined portion of the circuit board 7. Is electrically connected to the engine control unit.

枠体８は、アルミニウム等の非磁性金属材料をはじめとする各種金属材料もしくは合成樹脂材料からなる上側枠体８ａと下側枠体８ｂとに分割形成され、上側枠体８ａと下側枠体８ｂとの間に形成される空間領域は、移動部材３と磁性体４と磁石５と磁気検出体６と回路基板７等の各部材を収納する収納部を形成している。上側枠体８ａは、対向する一対の半円状平板部８ｃ，８ｄと、各半円状平板部８ｃ，８ｄの曲面側開口を塞ぐ曲面壁部８ｅとから主に構成されている。なお、８ｆは、操作グリップ２の回動操作解除時に移動部材３の当接面３ｇが当接することで、移動部材３の回動を規制する回動規制部であり、この回動規制部８ｆは、曲面壁部８ｅに一体的に形成されている。   The frame body 8 is divided into an upper frame body 8a and a lower frame body 8b made of various metal materials such as non-magnetic metal materials such as aluminum or a synthetic resin material. The upper frame body 8a and the lower frame body The space region formed between the two members 8b forms a storage portion that stores each member such as the moving member 3, the magnetic body 4, the magnet 5, the magnetic detection body 6, and the circuit board 7. The upper frame 8a is mainly composed of a pair of opposed semicircular flat plate portions 8c and 8d and a curved wall portion 8e that closes the curved surface side opening of each of the semicircular flat plate portions 8c and 8d. Reference numeral 8f denotes a rotation restricting portion that restricts the rotation of the moving member 3 by the contact of the contact surface 3g of the moving member 3 when the rotation operation of the operation grip 2 is released, and this rotation restricting portion 8f. Is formed integrally with the curved wall 8e.

一方、下側枠体８ｂは、半円を構成する曲面の片側端部を外側に膨出させた形状からなる一対の平板部８ｇ，８ｈと、各平板部８ｇ，８ｈにおける前記曲面並びにこれに連なる膨出部分の開口を塞ぐ壁部８ｉとから主に構成され、前記膨出部分に回路基板７を収納している。なお、各枠体８ａ，８ｂは、非磁性金属材料からなる図示しないボルト等の適宜固定手段によって固定されている。   On the other hand, the lower frame 8b includes a pair of flat plate portions 8g and 8h having a shape in which one end portion of a curved surface constituting a semicircle bulges outward, the curved surface in each of the flat plate portions 8g and 8h, and the curved surface. It is mainly comprised from the wall part 8i which blocks the opening of a continuous bulging part, and the circuit board 7 is accommodated in the said bulging part. Each frame 8a, 8b is fixed by appropriate fixing means such as a bolt (not shown) made of a nonmagnetic metal material.

本実施形態では、移動部材３と磁気ヘッドとが別体になっており、磁気ヘッドに移動部材３のスラスト方向のガタツキが伝わらないようにして、位置検出精度を向上させることができ、且つ、移動部材３と磁気ヘッドの間に板バネ４ｃを配設することで、移動部材３と磁気ヘッドの隙間Ｃを補い、磁気ヘッドの回動方向のガタツキを抑えることができる。また、一対の磁性体４が打ち抜き加工により平板状に形成されているとともに、一対の磁性体４の間に介在する一対の磁石５が円柱形状に成形されているため、磁性体４と磁石５とを容易に製作することができ、コスト上昇を抑えることができる。   In the present embodiment, the moving member 3 and the magnetic head are separated from each other, and it is possible to improve the position detection accuracy so that the magnetic head does not transmit backlash in the thrust direction of the moving member 3, and By disposing the leaf spring 4c between the moving member 3 and the magnetic head, it is possible to compensate for the gap C between the moving member 3 and the magnetic head, and to suppress backlash in the rotating direction of the magnetic head. In addition, since the pair of magnetic bodies 4 are formed into a flat plate shape by punching, and the pair of magnets 5 interposed between the pair of magnetic bodies 4 are formed in a cylindrical shape, the magnetic body 4 and the magnet 5 Can be manufactured easily, and cost increase can be suppressed.

本発明の実施形態の概観図。1 is an overview diagram of an embodiment of the present invention. 同上実施形態の断面図。Sectional drawing of embodiment same as the above. 同上実施形態の磁気ヘッドの説明図。Explanatory drawing of the magnetic head of embodiment same as the above.

符号の説明Explanation of symbols

１ ハンドルバー
２ 操作グリップ（操作手段）
２ｃ 突起部
３ 移動部材
４ 磁性体
４ａ 第１の磁性体
４ｂ 第２の磁性体
４ｃ 板バネ（緩衝部材）
５ 磁石
５ａ 第１の磁石
５ｂ 第２の磁石
６ 磁気検出体
７ 回路基板
８ 枠体
９ 保持体
Ｃ 隙間 1 Handlebar 2 Operating grip (operating means)
2c Projection 3 Moving member 4 Magnetic body 4a First magnetic body 4b Second magnetic body 4c Leaf spring (buffer member)
DESCRIPTION OF SYMBOLS 5 Magnet 5a 1st magnet 5b 2nd magnet 6 Magnetic detection body 7 Circuit board 8 Frame body 9 Holding body C Crevice

Claims (3)

対向面を有する一対の磁性体間に一対の磁石を配設し、前記一対の磁性体と前記一対の磁石とで閉磁気回路を形成してなる磁気ヘッドと、操作手段の操作量に応じて前記磁気ヘッドを移動させる移動部材と、前記磁気ヘッドにおける前記閉磁気回路の内部に配設され、前記移動部材の移動に伴い前記閉磁気回路の内部に生じる漏洩磁界の変化を検出する磁気検出体と、を備えた位置検出器において、前記移動部材と前記磁気ヘッドとは別体からなることを特徴とする位置検出器。   A magnetic head in which a pair of magnets are arranged between a pair of magnetic bodies having opposing surfaces, and a closed magnetic circuit is formed by the pair of magnetic bodies and the pair of magnets, and according to the operation amount of the operating means A moving member that moves the magnetic head, and a magnetic detector that is disposed inside the closed magnetic circuit in the magnetic head and detects a change in a leakage magnetic field generated in the closed magnetic circuit as the moving member moves. A position detector comprising: the moving member and the magnetic head separately. 前記移動部材と前記磁気ヘッドとの間に緩衝部材を配設してなることを特徴とする請求項１に記載の位置検出器。   The position detector according to claim 1, wherein a buffer member is disposed between the moving member and the magnetic head. 前記緩衝部材は、板バネであることを特徴とする請求項２に記載の位置検出器。   The position detector according to claim 2, wherein the buffer member is a leaf spring.

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