JP4408268B2 - Pickup coil - Google Patents

Pickup coil Download PDF

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Publication number
JP4408268B2
JP4408268B2 JP2005082248A JP2005082248A JP4408268B2 JP 4408268 B2 JP4408268 B2 JP 4408268B2 JP 2005082248 A JP2005082248 A JP 2005082248A JP 2005082248 A JP2005082248 A JP 2005082248A JP 4408268 B2 JP4408268 B2 JP 4408268B2
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Japan
Prior art keywords
pickup coil
center
coil
support frame
permanent magnet
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JP2005082248A
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JP2006266109A (en
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毅 北嶋
肇 早田
文則 寺本
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Honda Motor Co Ltd
Toyo Denso Co Ltd
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Honda Motor Co Ltd
Toyo Denso Co Ltd
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Priority to JP2005082248A priority Critical patent/JP4408268B2/en
Priority to DE102006010749A priority patent/DE102006010749B4/en
Priority to ES200600595A priority patent/ES2299336B2/en
Publication of JP2006266109A publication Critical patent/JP2006266109A/en
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Publication of JP4408268B2 publication Critical patent/JP4408268B2/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
    • G01D5/14—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage
    • G01D5/20—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature
    • G01D5/2006—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils
    • G01D5/2013—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing the magnitude of a current or voltage by varying inductance, e.g. by a movable armature by influencing the self-induction of one or more coils by a movable ferromagnetic element, e.g. a core
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P3/00—Measuring linear or angular speed; Measuring differences of linear or angular speeds
    • G01P3/42—Devices characterised by the use of electric or magnetic means
    • G01P3/44—Devices characterised by the use of electric or magnetic means for measuring angular speed
    • G01P3/48—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage
    • G01P3/481—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals
    • G01P3/488—Devices characterised by the use of electric or magnetic means for measuring angular speed by measuring frequency of generated current or voltage of pulse signals delivered by variable reluctance detectors

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Ignition Installations For Internal Combustion Engines (AREA)
  • Electrophonic Musical Instruments (AREA)
  • Geophysics And Detection Of Objects (AREA)
  • Investigating Or Analyzing Materials By The Use Of Magnetic Means (AREA)

Description

本発明はピックアップコイルに係り、特に、エンジンの回転数や回転位置を検出するピックアップコイルに関する。   The present invention relates to a pickup coil, and more particularly to a pickup coil that detects the rotational speed and rotational position of an engine.

特許文献１には、図５に示したように、前後方向に沿って配置された鉄心５１と、当該鉄心５１の後端部と磁気的に結合された永久磁石５２と、鉄心５１の外周に設けられたコイル５３と、このコイル５３の一端および他端と電気的に接続された一対のターミナル５４と、前記鉄心５１が貫通されて前記コイル５３が巻回されるボビン５５と、略T形状の鉄板を屈曲して形成され、長手方向の両端部にネジ穴５７が開口されて取付対象に当接される底部５６ａおよび当該底部５６ａの中央端部から垂直方向に立設された背部５６ｂから構成される支持フレーム５６とを主要な構成とし、絶縁材料５９で一体にモールドされたピックアップコイル５０が開示されている。
特公平７−９２３１号公報 In Patent Document 1, as shown in FIG. 5, an iron core 51 arranged along the front-rear direction, a permanent magnet 52 magnetically coupled to the rear end portion of the iron core 51, and an outer periphery of the iron core 51. A provided coil 53, a pair of terminals 54 electrically connected to one end and the other end of the coil 53, a bobbin 55 around which the iron core 51 is wound and the coil 53 is wound, and a substantially T shape A bottom portion 56a which is formed by bending a steel plate and has screw holes 57 opened at both ends in the longitudinal direction so as to come into contact with an object to be attached, and a back portion 56b which is erected in the vertical direction from the center end portion of the bottom portion 56a. A pickup coil 50 is disclosed which has a support frame 56 as a main component and is integrally molded with an insulating material 59.
Japanese Patent Publication No. 7-9231

上記した従来のピックアップコイル５０では、その構成部品の中でも重量物である鉄心５１，永久磁石５２およびコイル５３の全てが、支持フレームの２つのネジ穴５７を結んだ取付位置Cよりも後方に配置されているので、ピックアップコイル５０の重心位置と前記取付位置Ｃとの間に大きな隔たりがある。したがって、エンジンの振動が前記支持フレーム５６の取付位置Ｃからピックアップコイル５０に伝達されると、後方の慣性モーメントが大きいためにピックアップコイル５０が大きく振動し、検知精度が低下してしまうという技術課題があった。   In the above-described conventional pickup coil 50, all of the heavy components, such as the iron core 51, the permanent magnet 52, and the coil 53, are arranged behind the mounting position C connecting the two screw holes 57 of the support frame. Therefore, there is a large gap between the center of gravity of the pickup coil 50 and the mounting position C. Therefore, when the vibration of the engine is transmitted from the mounting position C of the support frame 56 to the pickup coil 50, the pickup coil 50 vibrates greatly due to the large moment of inertia at the rear, and the detection accuracy decreases. was there.

本発明の目的は、上記した従来技術の課題を解決し、取付対象のエンジン等から伝わる振動の影響が最小限に抑えられ、精度の高い検知結果が得られるピックアップコイルを提供することにある。   An object of the present invention is to solve the above-described problems of the prior art, and to provide a pickup coil in which the influence of vibration transmitted from an engine or the like to be attached is minimized and a highly accurate detection result can be obtained.

上記した目的を達成するために、本発明は、前後方向に沿って配置された鉄心と、この鉄心の後端と磁気的に結合された永久磁石と、鉄心に生じる磁束変化を検知するコイルと、コイルの両端に接続されたリード線と、永久磁石を後側で支持する背部を備えた支持フレームとを具備し、前記鉄心、永久磁石、コイル、リード線および支持フレームの背部が一体にモールドされ、支持フレームの露出部分に設けられた取付部で取付対象に固定されるピックアップコイルにおいて、以下の手段を講じた点に特徴がある。   In order to achieve the above-described object, the present invention provides an iron core arranged along the front-rear direction, a permanent magnet magnetically coupled to the rear end of the iron core, and a coil for detecting a magnetic flux change generated in the iron core. A lead wire connected to both ends of the coil, and a support frame having a back portion for supporting the permanent magnet on the rear side, and the back portions of the iron core, permanent magnet, coil, lead wire and support frame are integrally molded. In the pickup coil that is fixed to the mounting object by the mounting portion provided at the exposed portion of the support frame, the following means are taken.

(1)ピックアップコイルの前後方向に関する重心位置を調整する重心位置調整部材を含むことを特徴とする。   (1) It is characterized by including a center-of-gravity position adjusting member that adjusts the center-of-gravity position in the front-rear direction of the pickup coil.

(2)ピックアップコイルの前後方向に関する重心位置が、支持フレームの取付部またはその近傍にあることを特徴とする。   (2) The center-of-gravity position in the front-rear direction of the pickup coil is at or near the attachment portion of the support frame.

(3)重心位置調整部材が、支持フレームの取付部よりも後ろ側に配置されたことを特徴とする。   (3) The center-of-gravity position adjusting member is arranged behind the attachment portion of the support frame.

(4)重心位置調整部材が、永久磁石と支持フレームの背部との間に配置され、前記永久磁石と共に前記背部に共締めされたことを特徴とする。   (4) The center-of-gravity position adjusting member is disposed between the permanent magnet and the back portion of the support frame, and is fastened together with the permanent magnet to the back portion.

(5)コイルのリード線が、重心位置調整部材の配置位置よりも前側でモールド外へ引き出されていることを特徴とする。   (5) The coil lead wire is drawn out of the mold in front of the position where the gravity center position adjusting member is arranged.

(6)重心位置調整部材が磁性材料で形成されていることを特徴とする。   (6) The center of gravity position adjusting member is made of a magnetic material.

本発明によれば、以下のような効果が達成される。
(1)請求項１の発明によれば、ピックアップコイルの重心位置を、重心位置調整部材の寸法や比重を調整することで任意に設定できるようになる。したがって、ピックアップコイルの重心位置を、その振動が最小となる位置に設定すれば、精度の高い検知結果が得られるようになる。
(2)請求項２の発明によれば、ピックアップコイルの重心位置がフレーム部材の取付部に設定されるので、取付対象から当該取付部を介してピックアップコイルに振動が伝達されても、ピックアップコイルの振動を最小限に抑えられるようになり、その結果、精度の高い検知結果が得られるようになる。
(3)請求項３によれば、ピックアップコイルの重心位置を後方へ移動できるので、フレーム部材の取付部をピックアップコイルの後方にしか設けられない場合でも、当該取付部に重心位置を設定できるようになる。したがって、ピックアップコイルの設計にあたってフレーム部材の取付部の位置に関する制約が無くなり、設計の自由度が増す。
(4)請求項４の発明によれば、重心位置調整部材が永久磁石と共にフレーム部材の背部に共締めされるので、重心位置調整部材を固定するための部材の追加が不要になる。したがって、部品点数や重量の増加、さらには組立工数の増加等を最小限に抑えられるようになる。
(5)請求項５の発明によれば、リード線を重心位置調整部材の配置位置よりも前側でモールド外へ引き出すことができるので、重心位置調整部材の形状やサイズを変更する場合であっても、リード線の引き出し位置を変更する必要がない。
(6)請求項６の発明によれば、重心位置調整部材が磁性材料で形成されるので、重心位置調整部材を追加しても、鉄心や永久磁石を含む磁路が重心位置調整部材によって遮られてしまうことがない。 According to the present invention, the following effects are achieved.
(1) According to the invention of claim 1, the center of gravity position of the pickup coil can be arbitrarily set by adjusting the size and specific gravity of the center of gravity position adjusting member. Therefore, if the position of the center of gravity of the pickup coil is set to a position where the vibration is minimized, a highly accurate detection result can be obtained.
(2) According to the invention of claim 2, since the center of gravity position of the pickup coil is set to the attachment portion of the frame member, even if vibration is transmitted from the attachment target to the pickup coil via the attachment portion, the pickup coil As a result, a highly accurate detection result can be obtained.
(3) According to the third aspect, the center of gravity position of the pickup coil can be moved rearward, so that the center of gravity position can be set at the attachment portion even when the attachment portion of the frame member can be provided only behind the pickup coil. become. Therefore, there is no restriction on the position of the attachment portion of the frame member in designing the pickup coil, and the degree of freedom in design increases.
(4) According to the invention of claim 4, since the center-of-gravity position adjustment member is fastened together with the permanent magnet to the back of the frame member, it is not necessary to add a member for fixing the center-of-gravity position adjustment member. Therefore, an increase in the number of parts and weight, an increase in the number of assembly steps, etc. can be minimized.
(5) According to the invention of claim 5, the lead wire can be drawn out of the mold in front of the arrangement position of the center of gravity position adjusting member, so that the shape and size of the center of gravity position adjusting member are changed. However, it is not necessary to change the lead wire drawing position.
(6) According to the invention of claim 6, since the gravity center position adjusting member is formed of a magnetic material, even if the gravity center position adjusting member is added, the magnetic path including the iron core and the permanent magnet is blocked by the gravity center position adjusting member. There is no end to it.

以下、図面を参照して本発明の好ましい実施の形態について詳細に説明する。図１は、本発明に係るピックアップコイル１を、被検物の誘導片が配置されるロータ（いずれも図示せず）の軌道と対向する正面の反対側から見込んだ後正面図であり、図２は図１のAA線における一部破断断面図である。図３は前記ピックアップコイルの側面図であり、図４はピックアップコイルの上面図である。   Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a front view of a pickup coil 1 according to the present invention as viewed from the opposite side of the front surface facing a track of a rotor (none of which is shown) on which a guide piece of a test object is disposed. 2 is a partially broken sectional view taken along line AA in FIG. FIG. 3 is a side view of the pickup coil, and FIG. 4 is a top view of the pickup coil.

本実施形態のピックアップコイル１は、樹脂被覆された検知部２と、この検知部２をエンジンまたは車体ボディ等の取り付け対象にネジ止め固定するための支持フレーム３と、前記検知部２から外部に引き出された一対のリード線４とから構成されている。前記支持フレーム３は、略T形状の鉄板を屈曲して形成され、長手方向の両端部にネジ穴３０が開口されて取付対象に当接される底部３１と、この底部３１の中央端部から垂直方向に立設された背部３２とから構成されている。   The pickup coil 1 of the present embodiment includes a resin-coated detection unit 2, a support frame 3 for fixing the detection unit 2 to an attachment target such as an engine or a vehicle body, and the detection unit 2 to the outside. It consists of a pair of lead wires 4 drawn out. The support frame 3 is formed by bending a substantially T-shaped iron plate, and has a bottom portion 31 that has screw holes 30 at both ends in the longitudinal direction and abuts against an attachment target, and a central end portion of the bottom portion 31. The back portion 32 is erected in the vertical direction.

前記ピックアップコイル１の検知部２は、図２に一例を示したように、前後方向に沿って配置された角柱形状の鉄心６と、当該鉄心６の後端部と磁気的に結合された永久磁石５と、前記永久磁石５と磁気的に結合され、磁性材料で形成されたプレート７と、前記鉄心５が貫通されたボビン８およびその周囲に巻回されたコイル９と、前記支持フレーム３の背部３２に前記永久磁石５と共にネジ１０により共締めされ、磁性材料で構成されたスペーサ１１とを主要な構成としている。   As shown in FIG. 2, the detection unit 2 of the pickup coil 1 includes a prismatic iron core 6 disposed along the front-rear direction and a permanent coupling magnetically coupled to the rear end of the iron core 6. A magnet 5, a plate 7 magnetically coupled to the permanent magnet 5 and formed of a magnetic material, a bobbin 8 through which the iron core 5 passes and a coil 9 wound around the bobbin 8, and the support frame 3 A spacer 11 made of a magnetic material, which is fastened together with the permanent magnet 5 together with the screw 10 to the back portion 32 of the magnetic material, is a main component.

前記スペーサ１１は、後に詳述するように、ピックアップコイル１の前後方向に関する重心位置を調整する重心位置調整手段として機能するもので、支持フレーム３の底部３１に設けられた２つのネジ穴３０を結んだ取付位置Y（図４参照）よりも、その中心位置が後ろ側（図２では、取付位置Yよりも下側）に配置される。   As will be described in detail later, the spacer 11 functions as a center of gravity position adjusting means for adjusting the center of gravity position of the pickup coil 1 in the front-rear direction, and has two screw holes 30 provided in the bottom 31 of the support frame 3. The center position is arranged behind the connected mounting position Y (see FIG. 4) (on the lower side than the mounting position Y in FIG. 2).

前記コイル９の一端および他端には前記一対のリード線４が電気的に接続され、前記リード線４は、前記スペーサ１１よりも前方に配置された樹脂製のグロメット１３を貫通するようにして外部へ引き出されている。前記永久磁石５、鉄心６、プレート７、ボビン８、コイル９、支持フレーム３の背部３２、スペーサ１１およびグロメット１３は、絶縁樹脂外被１２で被覆されて一体化されている。   The pair of lead wires 4 are electrically connected to one end and the other end of the coil 9, and the lead wires 4 pass through a resin grommet 13 disposed in front of the spacer 11. Has been pulled out. The permanent magnet 5, the iron core 6, the plate 7, the bobbin 8, the coil 9, the back portion 32 of the support frame 3, the spacer 11 and the grommet 13 are covered and integrated with an insulating resin jacket 12.

このような構成において、エンジンに同期してロータが回転した際、その円周上に設けられた誘導片が鉄心６の先端と対向しない位置にあれば、永久磁石５の磁場は開磁路となる。これに対して、誘導片が鉄心６の先端と対向する位置を通過すると、永久磁石５の磁場は鉄心６、誘導片、ロータ、支持フレーム３およびスペーサ１１を介して閉磁路となる。この開磁路から閉磁路への変化により鉄心５の磁束が大きく変化し、この変化に伴ってコイル９に大きな起電力が生じることになる。   In such a configuration, when the rotor rotates in synchronization with the engine, the magnetic field of the permanent magnet 5 is an open magnetic path if the guide piece provided on the circumference thereof is not opposed to the tip of the iron core 6. Become. On the other hand, when the induction piece passes through the position facing the tip of the iron core 6, the magnetic field of the permanent magnet 5 becomes a closed magnetic circuit via the iron core 6, the induction piece, the rotor, the support frame 3, and the spacer 11. Due to the change from the open magnetic path to the closed magnetic path, the magnetic flux of the iron core 5 changes greatly, and a large electromotive force is generated in the coil 9 along with this change.

ここで、本実施形態では永久磁石５と支持フレーム３の背部３２との間に、前後方向に関する重心位置調整部材としてのスペーサ１１が挿貫されており、重量物である支持フレーム３の背部３２を、同じく重量物である鉄心６やコイル９から、前記２つのネジ穴３０を結んだ取付位置Yよりも後方へ離間配置できる。そして、前記スペーサ１１の幅や比重を調整すれば、ピックアップコイル１の前後方向に関する重心位置を後方の任意の位置に設定できる。   Here, in this embodiment, the spacer 11 as the center of gravity position adjusting member in the front-rear direction is inserted between the permanent magnet 5 and the back portion 32 of the support frame 3, and the back portion 32 of the support frame 3 that is a heavy object. Can be separated from the iron core 6 and the coil 9 which are also heavy objects to the rear of the mounting position Y where the two screw holes 30 are connected. If the width and specific gravity of the spacer 11 are adjusted, the position of the center of gravity with respect to the front-rear direction of the pickup coil 1 can be set to an arbitrary rear position.

このように、本実施形態ではスペーサ１１を設けたことにより、図４に一例を示したように、当該ピックアップコイル１の重心位置を、前記スペーサ１１が挿貫されていない場合の位置Xよりも後方へシフトさせることができるので、取付位置Yに重心位置を一致または近付けることができる。   Thus, in this embodiment, by providing the spacer 11, as shown in an example in FIG. 4, the position of the center of gravity of the pickup coil 1 is set higher than the position X when the spacer 11 is not inserted. Since it can be shifted backward, the center of gravity position can be matched or brought close to the attachment position Y.

したがって、支持フレーム３のネジ穴３０を、ピックアップコイル１の後ろ側にしか設けられない場合であっても、ピックアップコイル１の重心位置を、前記ネジ穴３０の位置またはその近傍に設定できるようになる。この結果、エンジンの振動に伴ってピックアップコイル１が振動する場合でも、その共振が最小限度に抑えられるので、精度の高いピックアップが可能になる。   Therefore, even when the screw hole 30 of the support frame 3 can be provided only on the rear side of the pickup coil 1, the position of the center of gravity of the pickup coil 1 can be set at or near the screw hole 30. Become. As a result, even when the pickup coil 1 vibrates with the vibration of the engine, the resonance is suppressed to the minimum, so that a highly accurate pickup is possible.

また、本実施形態では前記スペーサ１１が永久磁石５と共に支持フレーム３の背部３２に共締めされるので、スペーサ１１を固定するための部材の追加が不要になる。したがって、部品点数や重量の増加、さらには組立工数の増加等を最小限に抑えられるようになる。しかも、本実施形態では前記スペーサ１１が磁性材料で形成されるので、当該スペーサ１１を追加しても、鉄心６や永久磁石５を含む磁路が当該スペーサ１１によって遮られてしまうことがない。   In the present embodiment, the spacer 11 is fastened together with the permanent magnet 5 to the back portion 32 of the support frame 3, so that it is not necessary to add a member for fixing the spacer 11. Therefore, an increase in the number of parts and weight, an increase in the number of assembly steps, etc. can be minimized. In addition, in the present embodiment, since the spacer 11 is formed of a magnetic material, the magnetic path including the iron core 6 and the permanent magnet 5 is not blocked by the spacer 11 even if the spacer 11 is added.

さらに、本実施形態では重心位置の調整量に応じてスペーサ１１の形状やサイズが変更される場合に、スペーサ１１の前端位置は変わらずに後端位置だけが形状やサイズの変更に応じて変位するのでピックアップコイル１の全長が伸縮することになる。ここで、本実施形態ではコイル９のリード線４を外部に引き出すためのグロメット１３が前記スペーサ１１よりも前側に配置されているので、スペーサ１１の形状やサイズが変更される場合であっても、当該グロメット１３の位置や形状を変更する必要がない。   Furthermore, in this embodiment, when the shape and size of the spacer 11 are changed according to the adjustment amount of the center of gravity position, the front end position of the spacer 11 is not changed, and only the rear end position is displaced according to the change in shape and size. As a result, the entire length of the pickup coil 1 expands and contracts. Here, in this embodiment, since the grommet 13 for drawing the lead wire 4 of the coil 9 to the outside is disposed on the front side of the spacer 11, even if the shape and size of the spacer 11 are changed. There is no need to change the position or shape of the grommet 13.

以上、本発明の実施例を説明したが、本発明は上記実施例に限定されるものではなく、特許請求の範囲に記載された本発明を逸脱することなく種々の設計変更を行うことが可能である。   Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design changes can be made without departing from the present invention described in the claims. It is.

本発明に係るピックアップコイルの後正面図である。It is a rear front view of the pickup coil according to the present invention. 図１のAA線における一部破断断面図である。It is a partially broken sectional view in the AA line of FIG. 本発明に係るピックアップコイルの側面図である。It is a side view of a pickup coil according to the present invention. 本発明に係るピックアップコイルのの上面図である。It is a top view of a pickup coil according to the present invention. 従来のピックアップコイルの一部破断断面図である。It is a partially broken sectional view of the conventional pickup coil.

符号の説明Explanation of symbols

１…ピックアップコイル，２…検知部，３…支持フレーム，４…リード線，５…永久磁石，６…鉄心，７…フレーム部材，８…ボビン，９…コイル，１０…ネジ，１１…スペーサ，１２…絶縁樹脂外被，１３…グロメット，３０…ネジ穴，３１…底部，３２…背部   DESCRIPTION OF SYMBOLS 1 ... Pick-up coil, 2 ... Detection part, 3 ... Support frame, 4 ... Lead wire, 5 ... Permanent magnet, 6 ... Iron core, 7 ... Frame member, 8 ... Bobbin, 9 ... Coil, 10 ... Screw, 11 ... Spacer, 12 ... Insulating resin jacket, 13 ... Grommet, 30 ... Screw hole, 31 ... Bottom, 32 ... Back

Claims (6)

前後方向に沿って配置された鉄心と、
前記鉄心の後端と磁気的に結合された永久磁石と、
前記鉄心に生じる磁束変化を検知するコイルと、
前記コイルの両端に接続された一対のリード線と、
前記永久磁石を後側で支持する背部を備えた支持フレームとを具備し、
前記鉄心、永久磁石、コイル、リード線および支持フレームの背部が一体にモールドされ、前記支持フレームの露出部分に設けられた取付部で取付対象に固定されるピックアップコイルにおいて、
前記ピックアップコイルの前後方向に関する重心位置を調整する重心位置調整部材を含むことを特徴とするピックアップコイル。 An iron core arranged along the front-rear direction;
A permanent magnet magnetically coupled to the rear end of the iron core;
A coil for detecting a change in magnetic flux generated in the iron core;
A pair of lead wires connected to both ends of the coil;
A support frame having a back portion for supporting the permanent magnet on the rear side;
In the pickup coil in which the iron core, permanent magnet, coil, lead wire and back portion of the support frame are integrally molded, and fixed to the mounting object by the mounting portion provided in the exposed portion of the support frame,
A pickup coil comprising a center-of-gravity position adjusting member that adjusts the position of the center of gravity of the pickup coil in the front-rear direction. 前記ピックアップコイルの前後方向に関する重心位置が、前記支持フレームの取付部またはその近傍にあることを特徴とする請求項１に記載のピックアップコイル。   2. The pickup coil according to claim 1, wherein the position of the center of gravity in the front-rear direction of the pickup coil is at or near the attachment portion of the support frame. 前記重心位置調整部材が、前記支持フレームの取付部よりも後ろ側に配置されたことを特徴とする請求項１または２に記載のピックアップコイル。   3. The pickup coil according to claim 1, wherein the center-of-gravity position adjusting member is disposed behind the attachment portion of the support frame. 前記重心位置調整部材が、前記永久磁石と支持フレームの背部との間に配置され、前記永久磁石と共に前記背部に共締めされたことを特徴とする請求項１ないし３のいずれかに記載のピックアップコイル。   4. The pickup according to claim 1, wherein the center-of-gravity position adjusting member is disposed between the permanent magnet and a back portion of a support frame, and is fastened together with the permanent magnet to the back portion. coil. 前記一対のリード線が、前記重心位置調整部材の配置位置よりも前側で前記モールド外へ引き出されていることを特徴とする請求項１ないし４のいずれかに記載のピックアップコイル。   5. The pickup coil according to claim 1, wherein the pair of lead wires are drawn out of the mold on the front side of the arrangement position of the barycentric position adjusting member. 前記重心位置調整部材が磁性材料で形成されていることを特徴とする請求項１ないし６のいずれかに記載のピックアップコイル。   The pickup coil according to claim 1, wherein the center-of-gravity position adjusting member is made of a magnetic material.
JP2005082248A 2005-03-22 2005-03-22 Pickup coil Expired - Fee Related JP4408268B2 (en)

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DE102010006631A1 (en) * 2010-02-02 2011-08-04 Rolls-Royce Deutschland Ltd & Co KG, 15827 Inductive sensor for use in e.g. torque sensor arrangement in aircraft power units, has iron core with end supported in holder, where part of core is projected from holder and is surrounded by coil, and end is turned towards magnets

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US4517514A (en) * 1982-09-30 1985-05-14 Design Professionals Financial Corporation Vibration transducer with dual opposed magnetic assemblies and counterbalanced mass
DE3809886C2 (en) * 1988-03-24 1997-01-16 Teves Gmbh Alfred Automotive sensor
US5126561A (en) * 1988-05-24 1992-06-30 Canon Kabushiki Kaisha Angle displacement detector for optical image stabilization device
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