JP2019095245A - Mobile body detector - Google Patents

Abstract

To provide a mobile body detector having a detection accuracy not easily affected by vibrations from the outside.SOLUTION: The mobile body detector includes: a magnetism detection element 10 for outputting an electric signal according to the movement of a detection target body; a magnet 20 for applying a magnetic field to the magnetism detection element 10; a lead terminal 30, connected to the magnetic detection element 10; a first housing 40, having a container 43 containing the magnetism detection element 10, the magnet 20, and the lead terminal 30; and a second housing 50 fit and connected to the first housing 40, covering the container 43, the second housing facing the detection target body. The container 43 includes: a protruding part on a side surface of the container 43 in the longer direction (X) of the container 43; and a recess part and a contact part in the inside of the second housing 50; and a first protrusion on the side of the recess which faces the protruding part, the protruding part protruding to the outside (Y,-Y directions), the recess corresponding to the protruding part, and the contact part being in contact with a surface 20a of the magnet 20 exposed from the container 43.SELECTED DRAWING: Figure 3

Description

本発明は、磁気検出素子を用いる移動体検出装置に関する。   The present invention relates to a mobile object detection apparatus using a magnetic detection element.

直線運動や回転運動する移動体の移動を検出するため移動体検出装置には、例えば、特許文献１に開示されているように磁気検出素子と、磁気検出素子に磁界を加える磁石と、磁気検出素子に接続される基板とを備える検知部をセンサ本体に組み付け、センサ本体に連結されるカバーで検知部を覆い、カバーを介して機器に固定する構造が用いられている。   For example, as disclosed in Patent Document 1, a moving body detection device for detecting the movement of a moving body that performs linear motion or rotational movement includes a magnetic detection element, a magnet that applies a magnetic field to the magnetic detection element, and magnetic detection A structure is used in which a detection unit including a substrate connected to an element is attached to a sensor main body, a cover connected to the sensor main body covers the detection unit, and the sensor is fixed to the device via the cover.

特開２００６−２０８０２３号公報JP, 2006-208023, A

特許文献１に開示された固定構造では、機器にカバーを介してセンサ本体を固定しているため、機器の振動などによって磁気検出素子などがカバー内で変位することがあり、検出精度の低下を招くという問題がある。   In the fixing structure disclosed in Patent Document 1, the sensor main body is fixed to the device via the cover, so that the magnetic detection element or the like may be displaced in the cover due to the vibration of the device or the like. There is a problem of inviting them.

本発明は、このような実情に鑑みてなされたものであり、検出精度に関して外部からの振動の影響が生じにくい移動体検出装置を提供することを目的とする。   The present invention has been made in view of such circumstances, and it is an object of the present invention to provide a mobile object detection apparatus in which the influence of external vibration is less likely to occur with respect to detection accuracy.

本発明の移動体検出装置１００は、
被検出体Ｄの移動に応じた電気信号を出力する磁気検出素子１０と、
磁気検出素子１０に磁界を加える磁石２０と、
磁気検出素子１０に接続されるリード端子３０と、
磁気検出素子１０、磁石２０およびリード端子３０を収容する収容部４３を有する第１のハウジング４０と、
収容部４３を覆って第１のハウジング４０と嵌合連結され被検出体Ｄと対向して配置される第２のハウジング５０と、を備え、
収容部４３の長手（Ｘ）方向の側面に、外側（Ｙ,−Ｙ方向）に向けて突出する突出部４３ｄと、
第２のハウジング５０の内側には、突出部４３ｄに対応する凹部５４と、磁石２０の収容部４３から露出する面２０ａに当接する当接部５５と、
凹部５４の突出部４３ｄと対向する当接部５５側の面５４ａに第１の突起５４ａ１と、
を設けたことを特徴とする。 The mobile object detection apparatus 100 of the present invention is
A magnetic detection element 10 that outputs an electrical signal according to the movement of the detection subject D;
A magnet 20 for applying a magnetic field to the magnetic detection element 10;
Lead terminals 30 connected to the magnetic detection element 10;
A first housing 40 having a housing portion 43 for housing the magnetic detection element 10, the magnet 20 and the lead terminal 30;
And a second housing 50 which is engaged with the first housing 40 so as to cover the housing portion 43 and which is disposed to face the object to be detected D,
A projecting portion 43d that protrudes outward (in the Y and -Y directions) on the side surface in the longitudinal (X) direction of the accommodation portion 43;
Inside the second housing 50, a concave portion 54 corresponding to the projecting portion 43d, and an abutting portion 55 abutting on the surface 20a exposed from the accommodation portion 43 of the magnet 20;
A first protrusion 54a1 on a surface 54a on the side of the contact portion 55 facing the protrusion 43d of the recess 54;
Is provided.

凹部５４の突出部４３ｄと対向する当接部５５側の面５４ａと対向する面５４ｃは平坦であることを特徴とする。   A surface 54c opposite to the surface 54a on the side of the contact portion 55 facing the protrusion 43d of the recess 54 is flat.

凹部５４の突出部４３ｄの突出方向の面５４ｂに、第２の突起５４ｂ１を設けたこと
を特徴とする。 A second protrusion 54b1 is provided on the surface 54b in the protrusion direction of the protrusion 43d of the recess 54.

第１の突起５４ａ１を、凹部５４の当接部５５側の面５４ａのほぼ中央に設け、
第２の突起５４ｂ１を、凹部５４の突出部５４ｄの突出方向の面５４ｂのほぼ中央に設けたことを特徴とする。 Providing the first protrusion 54a1 substantially at the center of the surface 54a on the side of the contact portion 55 of the recess 54;
The second protrusion 54b1 is provided substantially at the center of the surface 54b in the protrusion direction of the protrusion 54d of the recess 54.

本発明によれば、検出精度に関して外部からの振動の影響が生じにくい移動体検出装置を提供することができる。   According to the present invention, it is possible to provide a mobile object detection apparatus in which the influence of external vibration is less likely to occur with respect to detection accuracy.

本発明の一実施形態に係る移動体検出装置を示す図。FIG. 2 is a view showing a mobile detection device according to an embodiment of the present invention. 図１を下方（−Ｚ方向）から見た図。The figure which looked at FIG. 1 from the downward direction (-Z direction). 図２のＡ−Ａ線断面図。AA sectional view taken on the line of FIG. 図１の移動体検出装置から第２ハウジングを外した図。The figure which removed the 2nd housing from the mobile body detection apparatus of FIG. 図４の第１ハウジングを上方（＋Ｚ方向）から見た図。The figure which looked at the 1st housing of FIG. 4 from upper direction (+ Z direction). 図１の第２ハウジングを示す図。The figure which shows the 2nd housing of FIG. 図６の第２ハウジングを裏側（−Ｘ方向）から見た図。The figure which looked at the 2nd housing of FIG. 6 from the back side (-X direction). 図７のＢ拡大図。The B enlarged view of FIG.

以下、本発明を実施するための一実施形態に係る移動体検出装置を、図面を参照しながら説明する。
なお、以下の説明では、図１に示した移動体検出装置１００の状態を基準として、前後方向をＸ方向、左右方向をＹ方向、上下方向をＺ方向とする。また、Ｘ方向、Ｙ方向及びＺ方向を示す矢印が向く方向を＋（プラス）方向、その反対方向を−（マイナス）方向として説明する。
本発明の移動体検出装置１００は、図２，図３に示すように被検出体Ｄの移動に応じた電気信号を出力する磁気検出素子１０と、磁気検出素子１０に磁界を加える磁石２０と、磁気検出素子１０に接続されるリード端子３０と、磁気検出素子１０、磁石２０およびリード端子３０が一方側に取り付けられる第１のハウジング４０と、第１のハウジング４０の一方側を覆って嵌合連結され被検出体と対向して配置される第２のハウジング５０と、を有し、第１のハウジング４０には、固定対象７０に固定設置するための固定部４２が設けられるとともに、リード端子３０の一部が埋設一体化されて構成されている。 Hereinafter, a mobile detection device according to an embodiment for carrying out the present invention will be described with reference to the drawings.
In the following description, the front-rear direction is X, the left-right direction is Y, and the vertical direction is Z, based on the state of the mobile object detection apparatus 100 shown in FIG. Moreover, the direction which the arrow which shows a X direction, a Y direction, and a Z direction turns is demonstrated as + (plus) direction, and the opposite direction as-(minus) direction.
The moving body detection apparatus 100 according to the present invention includes a magnetic detection element 10 that outputs an electric signal according to the movement of the detection target D as shown in FIGS. 2 and 3, and a magnet 20 that applies a magnetic field to the magnetic detection element 10. A first housing 40 to which the lead terminal 30 connected to the magnetic detection element 10, the magnetic detection element 10, the magnet 20 and the lead terminal 30 are attached on one side, and one side of the first housing 40 And a second housing 50 disposed opposite to the object to be detected, and the first housing 40 is provided with a fixing portion 42 for fixing and installing on the fixing object 70, and a lead A part of the terminal 30 is embedded and integrated.

移動体検出装置１００は、例えば、二輪車の前輪の車軸近傍に設けられる回転検出装置として構成され、検出される前輪の回転数から車速を計測する。すなわち、移動体検出装置１００では、前輪の車軸が被検出体Ｄとされ、車軸近傍の車体が固定対象７０とされ、固定対象７０に第１のハウジング４０の固定部４２が固定され、第１のハウジング４０に嵌合連結された第２のハウジング５０が車軸と対向して配置される。   The moving object detection device 100 is configured, for example, as a rotation detection device provided in the vicinity of an axle of a front wheel of a two-wheeled vehicle, and measures the vehicle speed from the detected rotation speed of the front wheel. That is, in the moving object detection device 100, the axle of the front wheel is the detected object D, the vehicle body in the vicinity of the axle is the fixing target 70, and the fixing portion 42 of the first housing 40 is fixed to the fixing target 70. A second housing 50 fitted and connected to the housing 40 is disposed opposite to the axle.

磁気検出素子１０は、被検出体である移動体Ｄの移動に伴う磁界の変化を感知するホールＩＣなどで構成されている。磁気検出素子１０は、先端の鉛直面（Ｙ−Ｚ面）の検出部１０ａに対して端子１０ｂが検出部１０ａの上端から直角に後方（−Ｘ方向）に突き出して設けられている。磁気検出素子１０は、第１のハウジング４０の収容部４３に収容される。収容部４３は、第１のハウジング４０と一体に成形され前方（＋Ｘ方向）に突き出すように成形されている。収容部４３は、図４に示すように前方側中央部付近が開口するとともに、上方（＋Ｚ方向）が開口した第１凹部４３ａが形成され、第１凹部４３ａ内に上方（＋Ｚ方向）から磁気検出素子１０の検出部１０ａが収容されて検出部１０ａの先端面（＋Ｘ方向の端面）が前方側中央部付近の開口に位置して被検出体と対向するように配置される。   The magnetic detection element 10 is configured of a Hall IC or the like that senses a change in the magnetic field caused by the movement of the movable body D, which is a detection target. The magnetic detection element 10 is provided with a terminal 10 b protruding backward (in the −X direction) at a right angle from the upper end of the detection unit 10 a with respect to the detection unit 10 a on the vertical surface (Y-Z surface) of the tip. The magnetic detection element 10 is housed in the housing portion 43 of the first housing 40. The housing portion 43 is formed integrally with the first housing 40 and formed so as to protrude forward (in the + X direction). As shown in FIG. 4, the housing portion 43 is opened at the front side central portion, and a first concave portion 43a is formed with the upper side (+ Z direction) opened, and the magnetic field is formed in the first concave portion 43a from the upper side (+ Z direction) The detection unit 10a of the detection element 10 is accommodated, and the tip end surface (the end surface in the + X direction) of the detection unit 10a is disposed at an opening near the front center and faces the object.

磁石２０は、磁気検出素子１０に磁界を加えるためのものである。磁石２０は、例えば直方体状に形成されたフェライト磁石で構成される。磁石２０は、図３に示すように、磁気検出素子１０が収容される第１凹部４３ａに隣接する後方（−Ｘ方向）に設けられ下方（−Ｚ方向）が開口した第２凹部４３ｂに下方から収容されている。   The magnet 20 is for applying a magnetic field to the magnetic detection element 10. The magnet 20 is formed of, for example, a ferrite magnet formed in a rectangular parallelepiped shape. As shown in FIG. 3, the magnet 20 is provided at the rear (−X direction) adjacent to the first recess 43 a in which the magnetic detection element 10 is accommodated and at the lower side in the second recess 43 b opened at the lower side (−Z direction). Are housed from

リード端子３０は、図３に示すように後述するコネクタ部４４から露出する後方側の端部３０ａと、収容部４３とコネクタ部４４の中間付近から露出し、磁気検出素子１０の端子１０ｂと電気的に接続される端子接続部３０ｂと、を備えている。２本のリード端子３０，３０は、後述する収容部４３の穴部Ｈの箇所で図示しない金型や治具によって平行に支持され、第１のハウジング４０に一体成形される収容部４３の上面と平行に配置されて第１のハウジング４０および収容部４３にインサート成形により埋設一体化される（図５参照）。２本のリード端子３０，３０の端子接続部３０ｂ，３０ｂがそれぞれ磁気検出素子１０の端子１０ｂ，１０ｂと抵抗溶接によって電気的に接続され、後方側の端部３０ａ（図３参照）が第１のハウジング４０の後方のコネクタ部４４内に突き出すコネクタピンとして検出信号を外部に導出できるようにしてある。
なお、端子接続部３０ｂと磁気検出素子１０の端子１０ｂとの間には、基板を設け、磁気検出素子１０の検出信号を処理するＩＣやチップ素子などの電子部品が実装された出力信号処理回路を設けておき、基板の処理回路で処理された出力信号を、リード端子３０を介してコネクタ部４４から外部に導出できるように、あるいは、磁気検出素子１０からの検出信号を出力した後、外部の処理回路で処理するように構成しても差し支えない。 As shown in FIG. 3, the lead terminal 30 is exposed from the rear end 30a exposed from the connector portion 44 described later and the middle of the accommodation portion 43 and the connector portion 44, and the terminal 10b of the magnetic detection element 10 and electricity are And the terminal connection part 30b connected in a similar manner. The two lead terminals 30, 30 are supported in parallel by a die or jig (not shown) at the hole H of the housing 43 described later, and the upper surface of the housing 43 integrally formed in the first housing 40 Parallel to the first housing 40 and the housing 43 by insert molding (see FIG. 5). The terminal connection portions 30b and 30b of the two lead terminals 30 and 30 are electrically connected to the terminals 10b and 10b of the magnetic detection element 10 by resistance welding, and the rear end 30a (see FIG. 3) is the first The detection signal can be derived to the outside as a connector pin protruding into the connector portion 44 at the rear of the housing 40 of FIG.
An output signal processing circuit is provided between the terminal connection portion 30b and the terminal 10b of the magnetic detection element 10, and an electronic component such as an IC or chip element for processing a detection signal of the magnetic detection element 10 is mounted. So that the output signal processed by the processing circuit of the substrate can be derived outside from the connector section 44 through the lead terminal 30, or after the detection signal from the magnetic detection element 10 is output, It may be configured to be processed by the processing circuit of

第１のハウジング４０は、図４に示すように、大小２つの円弧部を連結した外形が略小判状の本体部４１と、本体部４１の小さな円弧部の中心部に同心上に形成された固定部４２と、本体部４１の大きな円弧部の中心部から前方（＋Ｘ方向）に突き出して一体に形成された収容部４３と、本体部４１の大きな円弧部から後方（−Ｘ方向）に突き出して一体に形成されたコネクタ部４４と、を備えて構成されており、例えばポリブチレンテレフタレート（ＰＢＴ：Poly Butylene Terephthalate）樹脂など合成樹脂製とされている。なお、２つの円弧部の大きさは同じであっても良い。   As shown in FIG. 4, the first housing 40 is formed concentrically at the central portion of the main portion 41 having a substantially oval outer shape connecting the two large and small arc portions and the small arc portion of the main portion 41. The fixed portion 42, the housing portion 43 integrally formed by projecting forward (in the + X direction) from the central portion of the large arc portion of the main body portion 41, and projecting backward (in the −X direction) from the large arc portion of the main body portion 41 The connector unit 44 is integrally formed, and is made of synthetic resin such as polybutylene terephthalate (PBT) resin. The sizes of the two arc portions may be the same.

固定部４２は、金属製で円筒状のカラー４２ａを備えるとともに、第１のハウジング４０の本体部４１の下方（−Ｚ方向）に突き出す部分に一体化されている。固定部４２は、本体部４１の小さな円弧部に金属製の円筒状のカラー４２ａをインサート成形することで一体化されている。カラー４２ａには、図３に示すように、後方（−Ｘ方向）から固定用ボルトを入れて固定対象７０に締め付けることで、第１のハウジング４０を固定できる。
本体部４１は、大きな円弧部の内側縁部と小さな円弧部のカラー４２ａの大きな円弧部側の半円部とで囲まれる部分が側壁部４１ａとされ、側壁部４１ａで囲まれた内側部分が凹部とされて平板状の底板部４１ｂで後方（−Ｘ方向）側が塞がれている。 The fixing portion 42 is provided with a cylindrical collar 42 a made of metal, and is integrated with a portion of the first housing 40 that protrudes downward (in the −Z direction) of the main body portion 41. The fixing portion 42 is integrated by insert-molding a metal cylindrical collar 42 a in a small circular arc portion of the main body portion 41. As shown in FIG. 3, the first housing 40 can be fixed to the collar 42 a by inserting a fixing bolt from the rear (in the −X direction) and tightening the fixing target 70.
The main body portion 41 has a side wall portion 41a surrounded by the inner edge of the large arc portion and the semicircular portion on the large arc portion side of the small arc portion collar 42a, and the inner portion surrounded by the side wall portion 41a is The rear (−X direction) side is closed by the bottom plate portion 41 b which is a concave portion and is flat.

底板部４１ｂは、第２のハウジング５０とのＸ方向の接触面である。底板部４１ｂは、第２のハウジング５０のフランジ部５２と当接される。   The bottom plate portion 41 b is a contact surface in the X direction with the second housing 50. The bottom plate portion 41 b is in contact with the flange portion 52 of the second housing 50.

収容部４３は、図３に示すように本体部４１の底板部４１ｂの前方側に円柱部４３ｃを介して前方に突き出して略直方体状に一体に合成樹脂で成形されている。円柱部４３ｃの外周部には、Ｏリング溝が形成されてＯリング４５が装着され、後述する嵌合連結される第２のハウジング５０との間をシール状態とする。
収容部４３には、図５に示すように収容部４３の長手（Ｘ）方向の中ほど（中央付近）に穴部Ｈが設けられている。穴部Ｈは貫通孔である。また、穴部Ｈから２つの端子接続部３０ｂが露出しており、２つの端子接続部３０ｂの間には隙間Ｓが設けられている。
収容部４３は、既に説明したように、第１凹部４３ａと第２凹部４３ｂとが設けられ、第１凹部４３ａには、磁気検出素子１０が、第２凹部４３ｂには、磁石２０がそれぞれ装着される。 As shown in FIG. 3, the housing portion 43 protrudes forward from the bottom plate portion 41 b of the main body portion 41 via the cylindrical portion 43 c and is integrally molded in a substantially rectangular parallelepiped shape with synthetic resin. An O-ring groove is formed on the outer peripheral portion of the cylindrical portion 43c, and an O-ring 45 is mounted, and a seal state is established between the O-ring groove and a second housing 50 to be fitted and connected described later.
As shown in FIG. 5, the housing portion 43 is provided with a hole H in the middle (near the center) of the housing portion 43 in the longitudinal (X) direction. The hole H is a through hole. Further, two terminal connection portions 30b are exposed from the hole H, and a gap S is provided between the two terminal connection portions 30b.
As described above, the housing portion 43 is provided with the first concave portion 43a and the second concave portion 43b, and the magnetic detection element 10 is mounted in the first concave portion 43a, and the magnet 20 is mounted in the second concave portion 43b. Be done.

収容部４３は、図４，図５に示すように、その長手（Ｘ）方向の側面からそれぞれ外側（Ｙ方向、−Ｙ方向）に向けて突出する突出部４３ｄを備えている。   As shown in FIG. 4 and FIG. 5, the housing portion 43 includes projecting portions 43 d that respectively project outward (Y direction, −Y direction) from the side surface in the longitudinal (X) direction.

コネクタ部４４は、中空の四角筒状とされて後方（−Ｘ方向）が開口し、本体部４１の底板部４１ｂから後方に突き出して一体に形成されており、外部の装着側のコネクタ（図示せず）を所定の向きに連結でき、係止凹凸部によってコネクタ同士の係止連結状態を保持できるようにしてある。   The connector portion 44 is formed in a hollow square cylindrical shape and is open at the rear (−X direction) and protrudes rearward from the bottom plate portion 41 b of the main body portion 41 so as to be integrally formed. (Not shown) can be connected in a predetermined direction, and the locking concavo-convex portion can hold the locked connection state of the connectors.

第２のハウジング５０は、図１，図６に示すように第１のハウジング４０の一方側（前方側（＋Ｘ方向））の収容部４３を覆って嵌合連結され被検出体Ｄ（図２参照）と対向して配置される有底の円筒部５１と、円筒部５１の開口端に一体に形成されたフランジ部５２とを備えて形成されている。第２のハウジング５０は、第１のハウジング４０と同一の合成樹脂製とされ、例えば、ポリブチレンテレフタレート（ＰＢＴ）樹脂など合成樹脂製とされている。   As shown in FIGS. 1 and 6, the second housing 50 covers the receiving portion 43 on one side (the front side (+ X direction)) of the first housing 40, and is fitted and coupled. And a flange portion 52 integrally formed at the open end of the cylindrical portion 51. The second housing 50 is made of the same synthetic resin as the first housing 40, for example, made of synthetic resin such as polybutylene terephthalate (PBT) resin.

第２のハウジング５０の内側には、図７に示すように、突出部４３ｄに対応する凹部５４と、磁石２０の収容部４３から露出する面２０ａと当接する当接部５５が設けられている。凹部５４の突出部４３ｄと対向する当接部５５側の面５４ａには、突起（第１の突起）５４ａ１が設けられている。また、凹部５４の突出部４３ｄの突出方向の面５４ｂには、突起（第２の突起）５４ｂ１が設けられている。なお、凹部５４の面５４ａと対向する面５４ｃには突起を設けない。面５４ｃは平坦である。すなわち、突出部４３ｄは、突起５４ａ１，５４ａ２、面５４ｃによって保持され、さらに当接部５５が収容部４３を＋Ｚ方向に支持している。このような構成にすることによって、第１のハウジング４０と第２のハウジング５０を組付ける際、面５４ｃに突出部４３ｄを押し当てながら組み付けることができるため、突起５４ａ１が適宜弾性変形し、潰れにくくなる。また、収容部４３の左右からそれぞれ突出する突出部４３ｄを、両側から突起５４ｂ１で支持することによって、外部からの振動が収容部４３に伝達されにくくなる。したがって、組み付け後に振動を受けたとしても、第１のハウジング４０と第２のハウジング５０が適切な荷重で安定して保持されており、装置内部での磁気検出素子１０などの位置ずれが生じにくいため、検出精度の低下を招く可能性が低くなる。なお、面５４ｃに突起を設けることも可能ではあるが、第１のハウジング４０と第２のハウジング５０を組付ける際に突出部４３ｄを押し当てる基準面がないため、突起が潰れてしまう可能性が高くなる。   Inside the second housing 50, as shown in FIG. 7, a recess 54 corresponding to the protrusion 43d and an abutment 55 that abuts on the surface 20a exposed from the housing 43 of the magnet 20 are provided. . A protrusion (first protrusion) 54a1 is provided on the surface 54a on the side of the contact portion 55 facing the protrusion 43d of the recess 54. Further, a protrusion (second protrusion) 54b1 is provided on the surface 54b in the protrusion direction of the protrusion 43d of the recess 54. A protrusion is not provided on the surface 54c opposite to the surface 54a of the recess 54. The surface 54c is flat. That is, the protrusion 43d is held by the protrusions 54a1 and 54a2 and the surface 54c, and the contact portion 55 further supports the storage portion 43 in the + Z direction. With such a configuration, when assembling the first housing 40 and the second housing 50, the protrusion 54d can be pressed against the surface 54c, so that the protrusion 54a1 is appropriately elastically deformed and crushed. It becomes difficult. Further, by supporting the projecting portions 43 d respectively projecting from the left and right of the housing portion 43 with the projections 54 b 1 from both sides, it is difficult for the vibration from the outside to be transmitted to the housing portion 43. Therefore, even if vibration is received after assembly, the first housing 40 and the second housing 50 are stably held with an appropriate load, and positional deviation of the magnetic detection element 10 or the like in the apparatus is unlikely to occur. Therefore, the possibility of causing a decrease in detection accuracy is reduced. Although it is possible to provide a protrusion on the surface 54c, there is no possibility that the protrusion may be crushed because there is no reference surface for pressing the protrusion 43d when the first housing 40 and the second housing 50 are assembled. Becomes higher.

第２のハウジング５０は、第１のハウジング４０に一体に形成された収容部４３に収容された磁気検出素子１０および磁石２０などを覆うカバーとして円筒部５１が機能しており、円筒部５１の外周には、補強用のリブ５１ａが円周方向等間隔に複数本一体に形成してある。リブ５１ａにより、剛性を高めて固定対象７０からの振動の影響を緩和する。また、リブ５１ａは、Ｏリング５３取り付け時の誘い込みおよび移動体検出装置１００を固定対象７０に取り付ける際の誘い込みとしての機能を有している。円筒部５１のリブ５１ａの後方には、Ｏリング溝５１ｂが形成され、Ｏリング５３が装着され、固定対象７０との間をシールするとともに、Ｏリング５３によって固定対象７０からの振動の第１のハウジング４０への伝達を抑えている。
フランジ部５２は、第１のハウジング４０の側壁部４１ａの内側形状に沿った外形状に形成されており、周囲を囲む側壁部５２ａと、側壁部５２ａの前方側の開口部を塞ぐとともに、円筒部５１が一体に設けられた蓋板部５２ｂとで構成される。側壁部５２ａの底面５２ｃは、第１のハウジング４０とのＸ方向の接触面である。
これにより、第２のハウジング５０を第１のハウジング４０の内側に被せるように装着して連結することで、第１のハウジング４０の側壁部４１ａの内側に、第２のハウジング５０のフランジ部５２の側壁部５２ａが接するように嵌合され、側壁部４１ａの開口部が蓋板部５２ｂで塞がれた状態となり、フランジ部５２が第１のハウジング４０の固定部４２と同一の厚みとなる。
すなわち、第１のハウジング４０の本体部４１の側壁部４１ａの高さと第２のハウジング５０のフランジ部５２の側壁部５２ａの高さとが、嵌合連結状態とした場合に、蓋板部５２ｂが第１のハウジング４０の固定部４２と同一の厚みとなるように設定してある。
また、第２のハウジング５０のフランジ部５２は、第１のハウジング４０を固定部４２によって固定対象７０に固定設置すると、第１のハウジング４０と固定対象７０とに挟み込まれることになり、移動体検出装置１００を確実に固定対象７０に保持することができる。 The second housing 50 has a function of the cylindrical portion 51 as a cover for covering the magnetic detection element 10 and the magnet 20 housed in the housing portion 43 integrally formed in the first housing 40. On the outer periphery, a plurality of reinforcing ribs 51a are integrally formed at equal intervals in the circumferential direction. The ribs 51 a increase the rigidity to reduce the influence of the vibration from the fixed object 70. Further, the rib 51 a has a function as an invitation when the O-ring 53 is attached and an invitation when the moving object detection apparatus 100 is attached to the fixed object 70. An O-ring groove 51b is formed behind the rib 51a of the cylindrical portion 51, and the O-ring 53 is mounted to seal between the object to be fixed 70 and the first vibration of the object to be fixed 70 by the O-ring 53. Transmission to the housing 40 is suppressed.
The flange portion 52 is formed in an outer shape along the inner shape of the side wall portion 41a of the first housing 40, and covers the side wall portion 52a surrounding the periphery and the opening on the front side of the side wall portion 52a. It is comprised by the cover-plate part 52b with which the part 51 was provided integrally. The bottom surface 52 c of the side wall 52 a is a contact surface in the X direction with the first housing 40.
As a result, the second housing 50 is attached and connected so as to cover the inside of the first housing 40, whereby the flange portion 52 of the second housing 50 is provided inside the side wall portion 41 a of the first housing 40. The side wall 52a of the first housing 40 is fitted to be in contact with each other, the opening of the side wall 41a is closed by the lid plate 52b, and the flange 52 has the same thickness as the fixing portion 42 of the first housing 40. .
That is, when the height of the side wall portion 41a of the main body portion 41 of the first housing 40 and the height of the side wall portion 52a of the flange portion 52 of the second housing 50 are in the fitting connection state, the lid plate 52b is The thickness is set to be the same as that of the fixing portion 42 of the first housing 40.
Further, when the first housing 40 is fixed to the fixed object 70 by the fixing portion 42, the flange portion 52 of the second housing 50 is sandwiched between the first housing 40 and the fixed object 70, and thus the movable body The detection device 100 can be reliably held on the fixation target 70.

第１のハウジング４０と第２のハウジング５０との間には、図４，図６に示すように嵌合連結状態を保持する連結保持機構６０が設けられている。
固定対象７０に固定される固定側となる第１のハウジング４０には、側壁部４１ａに４箇所の係合凹部６１が略矩形の孔として形成されている。
第１のハウジング４０に嵌合連結される連結側となる第２のハウジング５０の側壁部５２ａに、係合凹部６１に内側から外側に向かって係合するフックを備えた係合凸部６２が一体に形成されている。
これにより、第２のハウジング５０の側壁部５２ａを第１のハウジング４０の側壁部４１ａの内側に装着して連結することで、第２のハウジング５０の係合凸部６２のフックが第１のハウジング４０の係合凹部６１の孔に係合し、第１のハウジング４０と第２のハウジング５０の嵌合連結状態が連結保持機構６０で保持される。
なお、係合凹部６１と係合凸部６２は、逆に第１のハウジング４０に係合凸部６２を設け、第２のハウジング５０に係合凹部６１を設けるようにしても良い。
さらに、この移動体検出装置１００では、第１のハウジング４０を固定部４２を介して固定対象７０に固定設置すると、第１のハウジング４０に嵌合連結した第２のハウジング５０のフランジ部５２が、第１のハウジング４０と固定対象７０とに挟み込まれることになり、例え、連結保持機構６０による嵌合連結状態に問題が生じても移動体検出装置１００を確実に固定対象７０に保持することができる。 Between the first housing 40 and the second housing 50, as shown in FIGS. 4 and 6, a connection holding mechanism 60 for holding the fitted connection state is provided.
In the first housing 40 on the fixed side fixed to the fixed object 70, four engaging concave portions 61 are formed as substantially rectangular holes in the side wall portion 41a.
In the side wall 52a of the second housing 50 on the connection side to be fitted and connected to the first housing 40, an engagement convex portion 62 having a hook that engages with the engagement concave portion 61 from the inside to the outside is It is integrally formed.
Thus, by attaching and connecting the side wall 52a of the second housing 50 to the inside of the side wall 41a of the first housing 40, the hook of the engagement convex portion 62 of the second housing 50 is the first. The connection holding mechanism 60 holds the first housing 40 and the second housing 50 in a fitted and connected state by engaging with the hole of the engagement recess 61 of the housing 40.
Conversely, the engagement recess 61 and the engagement protrusion 62 may be provided with the engagement protrusion 62 in the first housing 40 and the engagement recess 61 in the second housing 50.
Furthermore, in the movable body detection device 100, when the first housing 40 is fixed to the fixed object 70 via the fixing portion 42, the flange portion 52 of the second housing 50 fitted and connected to the first housing 40 , And the moving object detection apparatus 100 is reliably held on the fixing object 70 even if there is a problem in the fitting and connecting state by the connecting and holding mechanism 60 because the first housing 40 and the fixing object 70 are sandwiched. Can.

このような移動体検出装置１００は、図３に示すように、円柱部４３ｃにＯリング４５を装着し、収容部４３に磁気検出素子１０および磁石２０を収納した第１のハウジング４０に第２のハウジング５０を被せるようにして嵌合連結し、連結保持機構６０の係合凹部６１と係合凸部６２とを係合して連結状態を保持する。また、第２のハウジング５０のＯリング溝５１ｂにＯリング５３を装着しておく。
次いで、移動体検出装置１００を、固定対象７０に形成した被検出体Ｄと対向する取付孔７１に第２のハウジング５０を装着するようにし、第１のハウジング４０の固定部４２のカラー４２ａに入れた取付ボルトを固定対象７０に締め付けることで固定する。コネクタ部４４には、外部から装着用のコネクタが接続され、検出信号を外部に出力できるようにする。
これにより、移動体検出装置１００は、取付ボルトで固定対象７０に固定され、被検出体Ｄと磁気検出素子１０が対向した状態となり、被検出体の移動量（回転数など）が磁気検出素子１０で検出（計測）される。
移動体検出装置１００を、例えば、回転検出装置とする場合には、二輪車の前輪の車軸が被検出体とされ、車軸近傍の車体が固定対象７０とされ、固定対象７０に第１のハウジング４０の固定部４２を固定することで、第１のハウジング４０に嵌合連結された第２のハウジング５０の先端が取付孔７１内で車軸と対向して配置される。これにより、被検出体である二輪車の車軸が回転することにより生じる磁気変化から車軸の回転数が計測され、車速が演算されて外部に出力されたり、あるいは、車軸の回転数が検出されて出力される。 As shown in FIG. 3, such a mobile object detection apparatus 100 has the O-ring 45 attached to the cylindrical portion 43 c and the second housing 40 in which the magnetism detection element 10 and the magnet 20 are housed in the housing portion 43. The housing 50 is fitted and connected so as to cover the housing 50, and the engagement concave portion 61 of the connection holding mechanism 60 and the engagement convex portion 62 are engaged to maintain the connected state. Further, the O-ring 53 is attached to the O-ring groove 51 b of the second housing 50.
Next, the second housing 50 is attached to the attachment hole 71 facing the object D to be detected formed in the fixed object 70, and the movable body detection device 100 is attached to the collar 42 a of the fixed portion 42 of the first housing 40. The inserted mounting bolt is fixed to the fixed object 70 by tightening. A connector for mounting is connected to the connector section 44 from the outside, so that a detection signal can be output to the outside.
As a result, the movable body detection device 100 is fixed to the fixed object 70 by the mounting bolt, and the detected object D and the magnetic detection element 10 face each other, and the movement amount (rotation speed etc.) of the detected object is the magnetic detection element It is detected (measured) at 10.
When the moving object detection device 100 is, for example, a rotation detection device, the axle of the front wheel of a two-wheeled vehicle is the detection object, the vehicle body near the axle is the fixation object 70, and the fixation object 70 is the first housing 40 The front end of the second housing 50 fitted and coupled to the first housing 40 is disposed in the mounting hole 71 so as to face the axle by fixing the fixing portion 42 of the second housing 40. As a result, the number of revolutions of the axle is measured from the magnetic change caused by the rotation of the axle of the two-wheeled vehicle being detected, and the vehicle speed is calculated and output to the outside, or the number of revolutions of the axle is detected and output Be done.

移動体検出装置１００では、第１のハウジング４０に収容部４３を一体に形成してリード端子３０をインサート成形により埋設一体化しておき、収容部４３の第１凹部４３ａに磁気検出素子１０を収容し、第２凹部４３ｂに磁石２０を収容し、第１のハウジング４０を、固定部４２を介して固定対象７０に固定しているので、被検出体Ｄの振動系と移動体検出装置１００の振動系が同一となる。
これにより、これまで装置では、第２のハウジング５０を機器側である固定対象７０に固定し、第２のハウジング５０に第１のハウジング４０を連結していたので、被検出体の振動が第２のハウジング５０を介して磁気検出素子１０や磁石２０が収容固定された第１のハウジング４０に伝達され、２つの振動系から振動が伝達され、これらの振動の影響により検出精度の低下を招いていたが、本願移動体検出装置１００によれば、振動系が１つとなり振動の影響を抑えて高精度に検出することができる。
また、これまでの装置では、第２のハウジング５０に磁気検出素子１０や磁石２０を収容し樹脂を充填して硬化させるようにしていたが、本願移動体検出装置１００では、樹脂の充填による固定が不要となり、硬化時間を設ける必要がなく、短時間で効率よく生産することができる。
移動体検出装置１００では、第１のハウジング４０の内側に第２のハウジング５０を配置して嵌合連結するようにしたので、第２のハウジング５０をコンパクトにすることができ、小型軽量化により振動系の質量を小さくして振動の影響を抑えることができる。
また、第２のハウジング５０は、Ｏリング溝５１ｂの外周に装着したＯリング５３を介して固定対象７０の取付孔７１に装着してあるので、固定対象７０からの振動をＯリング５３で緩和することができ、振動低減効果を期待することができる。 In the moving body detection device 100, the housing portion 43 is integrally formed in the first housing 40, and the lead terminal 30 is embedded and integrated by insert molding, and the magnetic detection element 10 is housed in the first recess 43a of the housing portion 43. Because the magnet 20 is accommodated in the second recess 43 b and the first housing 40 is fixed to the fixed object 70 via the fixing portion 42, the vibration system of the detection subject D and the moving body detection device 100 are The vibration system is the same.
Thereby, in the apparatus, the second housing 50 is fixed to the fixed object 70 which is the device side, and the first housing 40 is connected to the second housing 50. The magnetic detection element 10 and the magnet 20 are transmitted to the first housing 40 in which the magnetic detection element 10 and the magnet 20 are accommodated and fixed via the two housings 50, and vibration is transmitted from the two vibration systems. However, according to the mobile object detection device 100 of the present application, the number of vibration systems is one, and the influence of vibration can be suppressed and detected with high accuracy.
Also, in the previous apparatuses, the magnetic detection element 10 and the magnet 20 were accommodated in the second housing 50 and resin was filled and cured, but in the mobile object detection apparatus 100 of the present invention, fixing by resin filling is performed. Is unnecessary, there is no need to set a curing time, and efficient production can be achieved in a short time.
In the moving body detection device 100, since the second housing 50 is disposed inside the first housing 40 and fitted and coupled, the second housing 50 can be made compact, and the size and weight can be reduced. The mass of the vibration system can be reduced to suppress the influence of vibration.
Further, since the second housing 50 is mounted in the mounting hole 71 of the fixed object 70 via the O ring 53 mounted on the outer periphery of the O ring groove 51 b, the vibration from the fixed object 70 is alleviated by the O ring 53. Vibration reduction effect can be expected.

以上、実施の形態と共に、具体的に説明したように、本発明の移動体検出装置１００によれば、被検出体の移動に応じた電気信号を出力する磁気検出素子１０と、磁気検出素子１０に磁界を加える磁石２０と、磁気検出素子１０に接続されるリード端子３０と、磁気検出素子１０、磁石２０およびリード端子３０が一方側に取り付けられる第１のハウジング４０と、第１のハウジング４０の一方側を覆って嵌合連結され被検出体と対向して配置される第２のハウジング５０と、を有し、第１のハウジング４０には、固定対象７０に固定設置するための固定部４２が設けられるとともに、リード端子３０の一部が埋設一体化されて構成されているので、固定対象７０の振動系と磁気検出素子１０や磁石２０の振動系が同一となり、異なる振動系による検出精度の低下を抑えて高精度に検出することができる。
また、固定対象７０に固定する第１のハウジング４０に磁気検出素子１０や磁石２０を固定するので、第２のハウジング５０に樹脂を充填し硬化させて磁気検出素子１０や磁石２０を固定する必要がなく、硬化時間が不要となり短時間に効率よく生産することができる。 As described above in detail together with the embodiment, according to the mobile object detection apparatus 100 of the present invention, the magnetic detection element 10 which outputs an electric signal according to the movement of the detection object, and the magnetic detection element 10 20, a first housing 40 in which the magnetic detection element 10, the magnet 20 and the lead terminal 30 are attached to one side, and a first housing 40. And a second housing 50 which is engaged with and coupled to one side of the second housing 50 and disposed opposite to the detection object, and fixed to the first housing 40 for fixed installation on the fixed object 70. 42 is provided, and a part of the lead terminal 30 is embedded and integrated, so that the vibration system of the fixed object 70 and the vibration system of the magnetic detection element 10 and the magnet 20 become the same, and different vibration systems It can be detected with high accuracy by suppressing a reduction in detection accuracy due.
Further, since the magnetic detection element 10 and the magnet 20 are fixed to the first housing 40 fixed to the fixation target 70, it is necessary to fill the second housing 50 with resin and harden it to fix the magnetic detection element 10 and the magnet 20. No curing time is required, and efficient production can be achieved in a short time.

本発明の移動体検出装置１００によれば、第２のハウジング５０には、固定部４２による固定設置にともない第１のハウジング４０と固定対象７０とに挟み込まれるフランジ部５２が設けられているので、第１のハウジング４０を介して第２のハウジング５０を確実に固定することができる。これにより、万一、第１のハウジング４０と第２のハウジング５０との嵌合連結が解放されるようなことがあってもそのまま固定対象７０への固定状態を維持することができる。   According to the movable body detection device 100 of the present invention, the second housing 50 is provided with the flange portion 52 which is sandwiched between the first housing 40 and the fixed object 70 in accordance with the fixed installation by the fixed portion 42. The second housing 50 can be securely fixed via the first housing 40. Thereby, even if the fitting connection between the first housing 40 and the second housing 50 is released, it is possible to maintain the fixing state to the fixing object 70 as it is.

本発明の移動体検出装置１００によれば、固定部４２は、金属製で円筒状のカラー４２ａを備えるとともに、第１のハウジング４０に一体化され、フランジ部５２は、固定部４２の周囲の少なくとも一部に形成されているので、固定部４２の金属製のカラー４２ａによって固定対象７０に確実に固定することができるとともに、固定部４２の固定にともなってフランジ部５２を挟んで固定することができ、一層強固に、確実に固定することができる。   According to the movable body detection device 100 of the present invention, the fixing portion 42 is provided with the metal and cylindrical collar 42 a and is integrated with the first housing 40, and the flange portion 52 is formed around the fixing portion 42. Since it is formed at least in part, it can be fixed securely to the fixed object 70 by the metal collar 42a of the fixed portion 42, and the flange portion 52 is sandwiched and fixed as the fixed portion 42 is fixed. Can be fixed more firmly.

第１のハウジング４０に設けられた収容部４３の突出部４３ｄが第２のハウジング５０に設けられた突起５４ａ１，５４ｂ１と面５４ｃによって支持されているので、第２のハウジング５０と磁気検出素子１０や磁石２０の振動系が同一となるため、位置ずれが生じにくくなり、検出精度の低下を抑えることができる。また、突出部４３ｄの１方向（−Ｚ方向）を面で支持、２方向（ＺとＹまたはーＹ方向）を点で支持するため、組付けが容易である。更に、突起５４ａ１，５４ｂ１をそれぞれ面５４ａ，５５ｂのほぼ中央とすることにより、荷重が分散され、位置ずれが生じにくくなることが期待できる。   The protrusion 43 d of the housing 43 provided in the first housing 40 is supported by the protrusions 54 a 1, 54 b 1 and the surface 54 c provided in the second housing 50, so the second housing 50 and the magnetic detection element 10 Also, since the vibration system of the magnet 20 is the same, positional deviation is less likely to occur, and a decrease in detection accuracy can be suppressed. In addition, since the protrusion 43d is supported in one direction (−Z direction) by a surface and is supported in two directions (Z and Y or −Y direction), assembling is easy. Furthermore, by making the projections 54a1 and 54b1 approximately at the centers of the surfaces 54a and 55b, it is expected that the load is dispersed and positional deviation is less likely to occur.

なお、上述の実施形態では、突出部４３ｄが２箇所の場合について例示したが、３箇所以上の場合においても同様の効果が期待できる。   In addition, in the above-mentioned embodiment, although the case where the protrusion part 43d was two places was illustrated, the same effect is expectable also in the case where it is three or more places.

本発明は、磁気検出素子を用いて二輪車の車軸の回転を検出する移動体（回転）検出装置、及び移動体（回転）検出装置の製造方法に利用可能である。   The present invention can be used for a moving body (rotation) detection device that detects rotation of an axle of a two-wheeled vehicle using a magnetic detection element, and a method of manufacturing the moving body (rotation) detection device.

１００ 移動体検出装置
１０ 磁気検出素子
１０ａ 検出部
１０ｂ 端子
２０ 磁石
２０ａ 面
３０ リード端子
３０ａ 端部
３０ｂ 端子接続部
４０ 第１のハウジング
４１ 本体部
４１ａ 側壁部
４１ｂ 底板部（接触面）
４２ 固定部
４２ａ カラー
４３ 収容部
４３ａ 第１凹部
４３ｂ 第２凹部
４３ｃ 円柱部
４３ｄ 突出部
４４ コネクタ部
４５ Ｏリング
５０ 第２のハウジング
５１ 円筒部
５１ａ リブ
５１ｂ Ｏリング溝
５２ フランジ部
５２ａ 側壁部
５２ｂ 蓋板部
５２ｃ 底面（接触面）
５３ Ｏリング
５４ 凹部
５４ａ 面
５４ａ１ 突起（第１の突起）
５４ｂ 面
５４ｂ１ 突起（第２の突起）
５４ｃ 面
５５ 当接部
６０ 連結保持機構
６１ 係合凹部
６２ 係合凸部
７０ 固定対象
７１ 取付孔
Ｄ 移動体（被検出体）
Ｈ 穴部
Ｓ 隙間

DESCRIPTION OF SYMBOLS 100 moving body detection apparatus 10 magnetic detection element 10a detection part 10b terminal 20 magnet 20a surface 30 lead terminal 30a end part 30b terminal connection part 40 1st housing 41 main body part 41a side wall part 41b bottom plate part (contact surface)
42 fixed portion 42a collar 43 housing portion 43a first concave portion 43b second concave portion 43c cylindrical portion 43d protruding portion 44 connector portion 45 O ring 50 second housing 51 cylindrical portion 51a rib 51b O ring groove 52 flange portion 52a side wall portion 52b lid Plate 52c bottom (contact surface)
53 O-ring 54 recessed portion 54 a surface 54 a 1 protrusion (first protrusion)
54b face 54b1 protrusion (second protrusion)
54c face 55 contact portion 60 connection holding mechanism 61 engagement concave portion 62 engagement convex portion 70 fixed object 71 mounting hole D moving body (detected body)
H Hole S Clearance

Claims (4)

被検出体の移動に応じた電気信号を出力する磁気検出素子と、
前記磁気検出素子に磁界を加える磁石と、
前記磁気検出素子に接続されるリード端子と、
前記磁気検出素子、前記磁石および前記リード端子を収容する収容部を有する第１のハウジングと、
前記収容部を覆って前記第１のハウジングと嵌合連結され前記被検出体と対向して配置される第２のハウジングと、を備えた移動体検出装置において、
前記収容部の長手方向の側面に、外側に向けて突出する突出部と、
前記第２のハウジングの内側には、前記突出部に対応する凹部と、前記磁石の前記収容部から露出する面に当接する当接部と、
前記凹部の前記突出部と対向する前記当接部側の面に第１の突起と、
を設けたこと
を特徴とする移動体検出装置。 A magnetic detection element that outputs an electrical signal according to the movement of the detection target;
A magnet that applies a magnetic field to the magnetic detection element;
A lead terminal connected to the magnetic detection element;
A first housing having a housing portion for housing the magnetism detection element, the magnet, and the lead terminal;
A movable body detection apparatus comprising: a second housing which is engaged with and coupled to the first housing so as to cover the housing portion and is disposed to face the detection target;
A protruding portion that protrudes outward on the longitudinal side surface of the housing portion;
Inside the second housing, a recess corresponding to the projecting portion, and an abutting portion that abuts on a surface exposed from the accommodating portion of the magnet;
A first protrusion on a surface on the side of the contact portion facing the protrusion of the recess;
A mobile object detection device characterized in that 前記凹部の前記突出部と対向する前記当接部側の面と対向する面は平坦であること
を特徴とする請求項１に記載の移動体検出装置。 The mobile object detection device according to claim 1, wherein a surface opposite to the surface on the side of the contact portion facing the projection of the recess is flat. 前記凹部の前記突出部の突出方向の面に、第２の突起を設けたこと
を特徴とする請求項１または請求項２に記載の移動体検出装置。 The mobile object detection device according to claim 1 or 2, wherein a second protrusion is provided on a surface of the recess in the protrusion direction of the protrusion. 前記第１の突起を、前記凹部の前記当接部側の面のほぼ中央に設け、
前記第２の突起を、前記凹部の前記突出部の突出方向の面のほぼ中央に設けたこと
を特徴とする請求項３に記載の移動体検出装置。


Providing the first protrusion substantially at the center of the surface on the contact portion side of the recess;
The mobile object detection device according to claim 3, wherein the second protrusion is provided substantially at the center of a surface of the recess in the protrusion direction of the protrusion.

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