JP4432027B2 - Moving object detection device - Google Patents

Description

本発明は、歯車や多極着磁のマグネットのような移動物体の移動状態を検出する移動物体検出装置に関するものである。   The present invention relates to a moving object detection apparatus that detects a moving state of a moving object such as a gear or a multipolar magnet.

移動物体検出装置としての回転検出装置は、特許文献１に開示されるものがある。この回転検出装置は、ホールＩＣやＭＲ素子等からなる磁気検出素子と、前記磁気検出素子と電気的に接触する回路基板と、前記磁気検出素子に磁場を与える磁石とを略円筒形状の樹脂製ハウジング内に配設し、前記ハウジング内にエポキシ等の充填部材を充填し硬化させることで前記ハウジング内に配設される各部を固定するものが知られている。
特開平２−２６４８１７号公報 A rotation detection device as a moving object detection device is disclosed in Patent Document 1. This rotation detection device is composed of a magnetic detection element made of a Hall IC, an MR element, etc., a circuit board that is in electrical contact with the magnetic detection element, and a magnet that applies a magnetic field to the magnetic detection element. It is known that an arrangement is made in a housing, and each portion arranged in the housing is fixed by filling and curing a filling member such as epoxy in the housing.
JP-A-2-264817

かかる回転検出装置は、前記磁石及び前記磁気検出素子を配設するヘッド部を有し、このヘッド部から延長形成され前記回路基板を配設するためのボディー部を有するホルダー部材を備え、前記ヘッド部の前記磁気検出素子がハウジングに設けられる磁気検出面に当接するように前記ホルダー部材が前記ハウジング内に配設されるとともに、前記ハウジング内に前記充填部材を充填することで、前記ハウジング内の各部を外部から隔離するとともに、前記各部を固定してなるものである。   Such a rotation detection device includes a head member in which the magnet and the magnetic detection element are disposed, and includes a holder member that extends from the head portion and has a body portion for disposing the circuit board. The holder member is disposed in the housing so that the magnetic detection element of the portion abuts on a magnetic detection surface provided in the housing, and the housing is filled with the filling member, Each part is isolated from the outside, and each part is fixed.

このような構造の回転検出装置は、前記充填部材の周囲環境の温度変化による膨張，収縮作用によって生じる応力歪みがもたらす不具合、即ち前記回路基板に形成される回路配線部の断線や前記磁気検出素子のリード部と前記回路基板のランド部との電気的接続の信頼性の低下（両部材は半田より電気的に接続されている）等の電気系の不具合が生じないように、略円筒形の前記ハウジング内の略中心に前記ホルダー部材及び前記回路基板を配設し、前記充填部材による応力が前記ホルダー部材，前記回路基板に略均等に付与されるように、言い換えれば前記応力歪みが前記回路基板に直接付与されない構造設計が重要視されている。しかしながら、被検出体の形状（例えば、ギアやロータ等の形状）や前記被検出体までの検出距離等の問題によって前記ハウジングの中心部からオフセットされた状態にて前記ホルダー部材及び前記回路基板が配設される場合が多いことが現状である。   The rotation detection device having such a structure has a problem caused by stress distortion caused by expansion and contraction due to a temperature change in the surrounding environment of the filling member, that is, disconnection of a circuit wiring portion formed on the circuit board and the magnetic detection element. In order to prevent an electrical problem such as a decrease in reliability of electrical connection between the lead portion of the circuit board and the land portion of the circuit board (both members are electrically connected by solder), a substantially cylindrical shape The holder member and the circuit board are disposed substantially at the center in the housing, and the stress due to the filling member is applied to the holder member and the circuit board substantially evenly. In other words, the stress strain is applied to the circuit. The structural design that is not directly applied to the substrate is regarded as important. However, the holder member and the circuit board are offset from the center of the housing due to problems such as the shape of the detected object (for example, the shape of a gear, a rotor, etc.) and the detection distance to the detected object. At present, it is often arranged.

そのため、前記充填部材からの前記応力を薄肉の前記回路基板が直接受けないように、前記ホルダー部材の前記回路基板を配設する載置面を前記回路基板より大きく形成するとともに、この載置面に一対の支持部に形成し、この支持部によって前記回路基板を支持し、前記支持部と前記回路基板とを溶着によって固着する構成が採用されている。しかしながら、前記被検出体が配設される検出領域の小型化，省スペース化が進む近年において、回転検出装置としての小型化も望まれており、前記ホルダー部材を大きく形成することは回転検出装置の小型化を図ることができない大きな要因となっている。   Therefore, the mounting surface on which the circuit board of the holder member is disposed is formed larger than the circuit board so that the thin circuit board does not directly receive the stress from the filling member. The circuit board is supported by the support part, and the support part and the circuit board are fixed to each other by welding. However, in recent years when the detection area in which the detection object is disposed is becoming smaller and space-saving, it is also desired to reduce the size of the rotation detection device. It is a major factor that cannot be downsized.

本発明の前述した問題点に着目し、応力歪みを抑制し電気系の不具合を防止できるとともに、小型化することが可能な移動物体検出装置を提供することを目的とする。   It is an object of the present invention to provide a moving object detection device that can suppress the stress distortion and prevent the malfunction of the electric system and can be miniaturized by paying attention to the above-mentioned problems.

本発明は、前述した課題を解決するため、請求項１に記載した移動物体検出装置のように、磁気検出素子と、前記磁気検出素子と電気的に接触する回路基板と、前記磁気検出素子に磁場を与える磁石とを樹脂製ハウジング内に配設するとともに、前記ハウジング内に充填部材を充填してなる移動物体検出装置であって、前記磁石及び前記磁気検出素子を配設するためのヘッド部と、前記ヘッド部から延長形成され前記回路基板を配設するためのボディー部とを少なくとも有するホルダー部材を前記ハウジング内に備え、前記ホルダー部材の前記回路基板を配設するための載置面は、前記ヘッド部の近傍が他の載置面と比べ幅狭となる小径部を有すると共に、前記回路基板は前記載置面の形状に合う幅狭部を有するものである。 In order to solve the above-described problem, the present invention provides a magnetic detection element, a circuit board in electrical contact with the magnetic detection element, and the magnetic detection element as in the moving object detection device according to claim 1. A moving object detection device in which a magnet for applying a magnetic field is disposed in a resin housing and a filling member is filled in the housing, the head unit for disposing the magnet and the magnetic detection element A holder member extending at least from the head portion and having a body portion for disposing the circuit board in the housing, and a mounting surface for disposing the circuit substrate of the holder member is The vicinity of the head portion has a small-diameter portion that is narrower than other placement surfaces, and the circuit board has a narrow portion that matches the shape of the placement surface .

また、請求項２に記載した移動物体検出装置のように、請求項１に記載の移動物体検出装置において、前記ボディー部は、前記回路基板を支持する少なくとも一対の支持部を有してなるものである。 Further, as in the moving object detection device according to claim 2 , in the moving object detection device according to claim 1, the body portion has at least a pair of support portions for supporting the circuit board. It is.

また、請求項３に記載した移動物体検出装置のように、請求項１に記載の移動物体検出装置において、前記ハウジング内に設けられ前記ホルダー部材を底面方向に案内する案内片と、前記ホルダー部材に設けられ前記案内片に対応する溝部とを備え、前記案内溝を前記案内片を沿わせた状態にて前記ホルダー部材を前記ハウジング内にスライド移動させて前記ヘッド部を前記ハウジング内の適正位置に配設した際に、前記ホルダー部材に配設される前記磁気検出素子が前記ハウジングに設けられた磁気検出面に当接するものである。 Further, as in the moving object detection device according to claim 3 , in the moving object detection device according to claim 1, a guide piece provided in the housing and guiding the holder member in a bottom surface direction, and the holder member And a groove portion corresponding to the guide piece, and the guide member is slid along the guide piece to slide the holder member into the housing to place the head portion in an appropriate position in the housing. The magnetic detection element provided on the holder member comes into contact with a magnetic detection surface provided on the housing.

また、請求項４に記載した移動物体検出装置のように、請求項３に記載の移動物体検出装置において、前記ヘッド部に前記磁石及び前記磁気検出素子を順次配設するための収納部と、前記収納部と前記案内溝とを連通する連通孔とを備え、前記案内片を前記磁気検出面に近づくに連れて前記ヘッド部の配設空間が狭まるような傾斜形状とし、前記ホルダー部材を前記ハウジングの適正位置に嵌め込んだ際に、前記磁石及び前記磁気検出素子を前記案内片の一部分によって前記磁気検出面方向へ押し圧してなるものである。 Further, as in the moving object detection device according to claim 4 , in the moving object detection device according to claim 3 , a storage portion for sequentially arranging the magnet and the magnetic detection element in the head portion; A communication hole that communicates the storage portion and the guide groove, and the guide piece has an inclined shape such that an arrangement space of the head portion is narrowed as the magnetic detection surface is approached. When fitted in an appropriate position of the housing, the magnet and the magnetic detection element are pressed toward the magnetic detection surface by a part of the guide piece.

本発明は、歯車や多極着磁のマグネットのような移動物体の移動状態を検出する移動物体検出装置に関し、応力歪みを抑制し電気系の不具合を防止できるとともに、小型化することが可能となる。   The present invention relates to a moving object detection device that detects a moving state of a moving object such as a gear or a multi-pole magnetized magnet, and is capable of suppressing stress distortion and preventing a malfunction of an electric system and reducing the size. Become.

以下、添付図面に基づいて本発明の実施形態を説明するが、移動物体検出装置として従来例と同様に回転検出装置を例に挙げ説明する。   Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. As a moving object detection device, a rotation detection device will be described as an example as in the conventional example.

回転検出装置Ａは、図１及び図２に示すように、ハウジング１と、ホルダー部材２と、磁石３と、磁気検出素子４と、回路基板５と、電気コード（配線部材）６と、充填部材７とから構成されている。   As shown in FIGS. 1 and 2, the rotation detection device A includes a housing 1, a holder member 2, a magnet 3, a magnetic detection element 4, a circuit board 5, an electric cord (wiring member) 6, and filling It is comprised from the member 7. FIG.

ハウジング１は、図３及び図４に示すように、ＰＢＴ等の樹脂製材料からなり筒状形状をなしている。ハウジング１は、円筒状の外周面の一部分を平坦面とし、他の壁部に比べ薄肉の壁部からなる磁気検出面１ａを有している。この磁気検出面１ａから上方には、段差部１ｂを介して取付部１ｃが外方に引き出し形成されている。また、取付部１ｃより上方には、取付部１ｃに対して略直交する状態にて外方に引き出し形成され、後で詳述する電気コード６を外部に引き出し案内する第１の規制部１ｄが形成されている。尚、取付部１ｃの略中央には、金属材料からなるカラー８がインサート成形されている。また、第１の規制部１ｄは、断面形状が略コの字状をなしており、電気コード６をその場に止めやすい形状をなしている。   As shown in FIGS. 3 and 4, the housing 1 is made of a resin material such as PBT and has a cylindrical shape. The housing 1 has a part of a cylindrical outer peripheral surface as a flat surface, and has a magnetic detection surface 1a including a wall portion thinner than other wall portions. A mounting portion 1c is formed outwardly from the magnetic detection surface 1a through a step portion 1b. A first restricting portion 1d is formed above the attachment portion 1c so as to be drawn out outward in a state substantially orthogonal to the attachment portion 1c, and draws out and guides the electric cord 6 described later in detail. Is formed. A collar 8 made of a metal material is insert-molded at the approximate center of the mounting portion 1c. Further, the first restricting portion 1d has a substantially U-shaped cross section, and has a shape that makes it easy to stop the electric cord 6 on the spot.

一方、ハウジング１の内部には、後で詳述するホルダー部材２をハウジング１の底面１ｅ方向に案内する案内片１ｆが内壁と一体的に形成されている。案内片１ｆは、ハウジング１の底面１ｅから段差部１ｂとハウジング１の上端部との略中間位置まで達するように形成されており、ホルダー部材２をハウジング１内の適正位置に配設しやすいようになっている。また、案内片１ｆは、ハウジング１の内部側となる磁気検出面１ａに近づくにつれてホルダー部材２の後述するヘッド部の配設空間が狭まるような傾斜形状をなしている。   On the other hand, a guide piece 1 f for guiding a holder member 2, which will be described in detail later, in the direction of the bottom surface 1 e of the housing 1 is formed integrally with the inner wall inside the housing 1. The guide piece 1 f is formed so as to reach from the bottom surface 1 e of the housing 1 to a substantially intermediate position between the stepped portion 1 b and the upper end portion of the housing 1, so that the holder member 2 can be easily disposed at an appropriate position in the housing 1. It has become. Further, the guide piece 1f has an inclined shape such that a space for arranging a head portion (to be described later) of the holder member 2 becomes narrower as the magnetic detection surface 1a on the inner side of the housing 1 is approached.

ホルダー部材２は、図５及び図６に示すように、ＰＢＴ等の樹脂製材料からなり、ホルダー部材２は、ヘッド部２１と、ボディー部２２と、引き出し部２３と、連結部２４とから構成されており、前記各部２１，２２，２３，２４は、一体的に形成されるとともに、断面形状が略Ｌ字形状をなしている。   As shown in FIGS. 5 and 6, the holder member 2 is made of a resin material such as PBT, and the holder member 2 includes a head portion 21, a body portion 22, a drawer portion 23, and a connecting portion 24. The parts 21, 22, 23, and 24 are integrally formed and have a substantially L-shaped cross section.

ヘッド部２１は、後で詳述する磁石３を配設するための第１の凹部２１ａと、第１の凹部２１ａより上方に位置し後で詳述する磁気検出素子３を配設するための第２の凹部２１ｂとを備えている。また、第１の凹部２１の底面には後述する案内溝に連通する連通孔２１ｃが形成されている。   The head portion 21 is provided with a first recess 21a for disposing a magnet 3 to be described in detail later, and a magnetic detection element 3 to be described in detail later and positioned above the first recess 21a. And a second recess 21b. In addition, a communication hole 21 c that communicates with a guide groove described later is formed on the bottom surface of the first recess 21.

ボディー部２２は、ヘッド部２１から延長形成されるとともに、後で詳述する回路基板５を配設するための載置部２２ａを有している。この載置部２２ａは、ヘッド部２１に近づくに連れて幅狭の小径部となる載置面２２ｂを有し、この載置面２２ｂの上部及び下部には、一対の係止部（支持部）２２ｃ，２２ｄがそれぞれ設けられている。また、載置面２２ｂは、回路基板５の載置面との当接面と略同等な形状をなしている。一方、ボディー部２２の裏面側には、ハウジング１の内部に設けられるガイド部材１ｆに対応する案内溝２２ｅがボディー部２２の略中心部分に形成されており、この案内溝２２ｅは、ボディー部２２からヘッド部２１に達するように形成されており、案内溝２２ｅにおけるヘッド部２１の対応個所には、第１の凹部２１ａに連通する連通孔２１ｃが設けられている。   The body portion 22 extends from the head portion 21 and has a placement portion 22a for disposing a circuit board 5 to be described in detail later. The mounting portion 22a has a mounting surface 22b that becomes a small-diameter portion with a narrower width as it approaches the head portion 21, and a pair of locking portions (supporting portions) are provided above and below the mounting surface 22b. ) 22c and 22d are provided. Further, the mounting surface 22 b has a shape substantially equivalent to a contact surface with the mounting surface of the circuit board 5. On the other hand, a guide groove 22e corresponding to a guide member 1f provided inside the housing 1 is formed in a substantially central portion of the body part 22 on the back side of the body part 22, and the guide groove 22e is formed on the body part 22. Is formed so as to reach the head portion 21, and a communication hole 21 c communicating with the first recess 21 a is provided at a corresponding portion of the head portion 21 in the guide groove 22 e.

引き出し部２３は、ボディー部２２と略直交する状態にて連結部２４を介して引き出し形成され、この引き出された部位がハウジング１に設けられる第１の規制部１ｇに対応する第２の規制部２３ａを構成している。第２の規制部２３ａは、第１の規制部１ｄの形状に対応する断面形状が略コの字状をなし、第１の規制部１ｄに組み合わされることで電気コード６を外部に導くための導出路Ｓを形成する。第２の規制部２３ａは、第１の規制部１ｄのハウジング１側に形成された溝部（第２の係止部）１ｇの係合する一対のフック部材（第１の係止部）２３ｂが形成されている。従って、ホルダー部材２は、ハウジング１に設けられたガイド部材１ｆに案内溝２２ｅを沿わせてハウジング１の底面１ｅ方向にスライド移動させ、第２の規制部２３ａに設けられたフック部材２３ｂを第１の規制部１ｄに設けられた溝部１ｇに係合させることで、ヘッド部２１がハウジング１の底面１ｅに位置するとともに、ヘッド部２１に配設された磁気検出素子４がハウジング１の内側の磁気検出面１ａに位置することになる。   The lead portion 23 is formed to be drawn through the connecting portion 24 in a state substantially orthogonal to the body portion 22, and the drawn out portion is a second restricting portion corresponding to the first restricting portion 1 g provided in the housing 1. 23a is configured. The second restricting portion 23a has a substantially U-shaped cross section corresponding to the shape of the first restricting portion 1d, and is combined with the first restricting portion 1d to guide the electric cord 6 to the outside. A lead-out path S is formed. The second restricting portion 23a includes a pair of hook members (first engaging portions) 23b that engage with a groove (second engaging portion) 1g formed on the housing 1 side of the first restricting portion 1d. Is formed. Therefore, the holder member 2 slides the guide member 1f provided in the housing 1 along the guide groove 22e in the direction of the bottom surface 1e of the housing 1, and moves the hook member 23b provided in the second restricting portion 23a to the first member. By engaging with a groove portion 1g provided in the first restricting portion 1d, the head portion 21 is positioned on the bottom surface 1e of the housing 1, and the magnetic detection element 4 disposed in the head portion 21 is located inside the housing 1. It is located on the magnetic detection surface 1a.

連結部２４は、段差形状をなし、ボディー部２２と引き出し部２３とを連結する。連結部２４は、ボディー部２２の載置面２２ｂに配設される回路基板５と電気的に接続される電気コード６を第１の規制部１ｄと第２の規制部２３ａとで構成される導出路Ｓへと導くための貫通孔部２４ａが形成されている。   The connecting portion 24 has a step shape and connects the body portion 22 and the drawer portion 23. The connecting portion 24 includes an electric cord 6 electrically connected to the circuit board 5 disposed on the mounting surface 22b of the body portion 22 by a first restricting portion 1d and a second restricting portion 23a. A through-hole portion 24a for leading to the lead-out path S is formed.

磁石３は、ホルダー部材２のヘッド部２１に設けられる第１の凹部２１ａに接着剤を介して配設され、磁気検出素子４に磁場を与えるものであり、図示しない磁性材料からなる被検出体（例えば、ギア）の凹凸の変化によって磁力が変化する。   The magnet 3 is disposed in the first recess 21a provided in the head portion 21 of the holder member 2 via an adhesive, and applies a magnetic field to the magnetic detection element 4, and is a detection target made of a magnetic material (not shown). The magnetic force is changed by changing the unevenness of (for example, gear).

磁気検出素子４は、ホールＩＣやＭＲ素子等からなり、ホルダー部材２のヘッド部２１に設けられる第２の凹部２２ｂに磁石３と当接する状態にて配設される。磁気検出素子４は、前記被検出体の移動に伴う磁力の変化を電気信号に変換し、回路基板５及び電気コード６を介して外部に出力するものである。磁気検出素子４は、直線状にフォーミングされたリード端子４ａが回路基板５の図示しない接続ランドに半田を介して電気的に接続される。   The magnetic detection element 4 is composed of a Hall IC, an MR element, or the like, and is disposed in a state in which the magnet 3 is in contact with a second recess 22 b provided in the head portion 21 of the holder member 2. The magnetic detection element 4 converts a change in magnetic force accompanying the movement of the detected object into an electric signal and outputs it to the outside via the circuit board 5 and the electric cord 6. In the magnetic detection element 4, the lead terminals 4 a formed in a linear shape are electrically connected to connection lands (not shown) of the circuit board 5 via solder.

回路基板５は、ガラス繊維入りエポキシ樹脂や紙フェノール樹脂あるいはセラミック等絶縁材料に所定の配線パターン（図示しない）を形成してなるもので、磁気検出素子４及び電気コード６と電気的に接続される。回路基板５は、ボディー部２２における載置部２２ａの載置面２２ｂの形状に合うように外周がカットされ、回路基板５の幅狭部５ａ及び幅広部５ｂ（回路基板５の外周）が、ボディー部２２の載置部２２ａに設けられる各係止部２２ｃ，２２ｄに支持されることで、載置面２２ｂに配設固定される。尚、回路基板５をホルダー部材２の載置面２２ｂに配設する際は、回路基板５を連結部２４側から載置面２ｂと各係止部２２ｃ，２２ｄとの間に形成される隙間に挿入することで、載置面２２ｂに回路基板５が配設される。また、回路基板５には、ノイズ吸収用のコンデンサや磁気変換素子４からの出力信号を処理するためのコンパレータ等の電子部品（図示しない）が実装される。   The circuit board 5 is formed by forming a predetermined wiring pattern (not shown) on an insulating material such as epoxy resin containing glass fiber, paper phenol resin, or ceramic, and is electrically connected to the magnetic detection element 4 and the electric cord 6. The The outer periphery of the circuit board 5 is cut so as to match the shape of the mounting surface 22b of the mounting part 22a in the body part 22, and the narrow part 5a and the wide part 5b (the outer periphery of the circuit board 5) of the circuit board 5 are By being supported by the respective locking portions 22c and 22d provided on the mounting portion 22a of the body portion 22, it is disposed and fixed on the mounting surface 22b. When the circuit board 5 is disposed on the mounting surface 22b of the holder member 2, a gap formed between the mounting surface 2b and the locking portions 22c and 22d from the connecting portion 24 side. The circuit board 5 is disposed on the placement surface 22b. The circuit board 5 is mounted with electronic components (not shown) such as a noise absorbing capacitor and a comparator for processing an output signal from the magnetic transducer 4.

電気コード６は、磁気検出素子４への電極供給ライン（プラス電源とマイナス電源）と磁気検出素子４からの信号出力ラインの少なくとも３本を有し、回路基板６の磁気検出素子４との非接続側に形成される接続ランド５ｃと半田を介して電気的に接続される。電気コード６は、第１の規制部１ｄと第２の規制部２３ａとで構成される導出路Ｓから導出されるとともに、熱収縮チューブやテープ等の固定部材９によって第１，第２の規制部１ｄ，２３ａに固定される。   The electric cord 6 has at least three electrode supply lines (a positive power source and a negative power source) to the magnetic detection element 4 and a signal output line from the magnetic detection element 4, and is not connected to the magnetic detection element 4 on the circuit board 6. It is electrically connected to the connection land 5c formed on the connection side via solder. The electric cord 6 is led out from the lead-out path S composed of the first restricting portion 1d and the second restricting portion 23a, and the first and second restricting members 9 are fixed by a fixing member 9 such as a heat-shrinkable tube or tape. It is fixed to the parts 1d and 23a.

充填部材７は、エポキシ等の熱硬化型樹脂からなり、前述した各部を収納するハウジング１内に充填され、ホルダー部材２，磁石３，磁気検出素子４及び回路基板５等を外部から隔離するとともに、前記した各部２，３，４，５を固定する。   The filling member 7 is made of a thermosetting resin such as epoxy, and is filled in the housing 1 that houses the above-described parts, and isolates the holder member 2, the magnet 3, the magnetic detection element 4, the circuit board 5, and the like from the outside. The parts 2, 3, 4 and 5 are fixed.

前述した各部によって回転検出装置Ａが構成される。かかる回転検出装置Ａは、磁気検出素子４と、磁気検出素子４と電気的に接続される回路基板５と、磁気検出素子４に磁場を与える磁石３とを樹脂製ハウジング１内に配設するとともに、ハウジング１内に充填部材７を充填してなる回転検出装置Ａに関し、磁石３及び磁気検出素子４を配設するためのヘッド部２１と、ヘッド部２１から延長形成され回路基板５を配設するボディー部２２とを少なくとも有するホルダー部材２をハウジング１内に備え、ホルダー部材２の回路基板５を配設するための載置面２２ｂと、回路基板５の載置面２２ｂとの当接面（電子部品の非搭載面）との形状を略同等な形状としてなることに特徴を有するものである。   The rotation detection device A is configured by the above-described units. In the rotation detection device A, a magnetic detection element 4, a circuit board 5 electrically connected to the magnetic detection element 4, and a magnet 3 that applies a magnetic field to the magnetic detection element 4 are disposed in the resin housing 1. At the same time, with respect to the rotation detection device A in which the housing 1 is filled with the filling member 7, a head portion 21 for disposing the magnet 3 and the magnetic detection element 4, and a circuit board 5 extended from the head portion 21 are arranged. A holder member 2 having at least a body portion 22 to be provided is provided in the housing 1, and the mounting surface 22 b for disposing the circuit board 5 of the holder member 2 and the mounting surface 22 b of the circuit board 5 are in contact with each other. It is characterized in that the shape of the surface (the non-mounting surface of the electronic component) is substantially equivalent.

従って、ホルダー部材２の載置面２２ｂの形状と、回路基板５の当接面の形状とを合わせることによって、充填部材７による応力歪みによる影響を回路基板５が直接受けることがなくなるため、回路基板５に形成される回路配線部の断線や磁気検出素子４のリード部４ａと回路基板５のランド部との電気的接続の信頼性の低下等の電気系の不具合が生じない構成であるとともに、回路基板５の当接面の形状に適応した最小限の面積を有する載置面２２ｂをホルダー部材２に設ければ良いため、小型化することが可能となり、小型化，省スペース化が進む被検出体の検出領域に配設するにふさわしい回転検出装置Ａを得ることができる。   Accordingly, by matching the shape of the mounting surface 22b of the holder member 2 with the shape of the contact surface of the circuit board 5, the circuit board 5 is not directly affected by the stress distortion caused by the filling member 7, so that the circuit The circuit wiring unit formed on the substrate 5 is not broken, and electrical problems such as a decrease in reliability of electrical connection between the lead portion 4a of the magnetic detection element 4 and the land portion of the circuit substrate 5 do not occur. Since it is only necessary to provide the holder member 2 with the mounting surface 22b having a minimum area adapted to the shape of the contact surface of the circuit board 5, it is possible to reduce the size, and to reduce the size and space. The rotation detection device A suitable for being arranged in the detection area of the detection object can be obtained.

また、回転検出装置Ａにおけるホルダー部材２は、ヘッド部２１の近傍が他の載置面２２ｂと比べ幅狭となる小径部を有する載置面２２ｂとすることから、ホルダー部材２を更に小型化するとともに、回転検出装置Ａとしても更に小型化を図ることが可能となる。   Further, the holder member 2 in the rotation detecting device A is a mounting surface 22b having a small diameter portion in which the vicinity of the head portion 21 is narrower than the other mounting surface 22b, so that the holder member 2 is further downsized. In addition, the rotation detection device A can be further downsized.

また、ホルダー部材２におけるボディー部２２は、回路基板５の幅狭部５ａ及ぶ幅広部５ｂに対応する（回路基板５の外周に対応する）二組（二対）の係止部２２ｃ，２２ｄを有してなり、回路基板５を載置面２２ｂと各係止部２２ｃ，２２ｄとの間に形成される隙間に挿入することで載置面２２ｂ上に固定することから、溶着によって載置面に固定していた従来に比べ、製造工程を簡素化することが可能であるとともに、各係止部２２ｃ，２２ｄによって安定的に載置面２２ｂ上に固定できることから、充填部材７による応力歪みの影響を更に受けにくい構造を得ることが可能となる。   The body portion 22 of the holder member 2 includes two sets (two pairs) of locking portions 22c and 22d corresponding to the narrow portion 5a and the wide portion 5b of the circuit board 5 (corresponding to the outer periphery of the circuit board 5). The circuit board 5 is fixed on the mounting surface 22b by being inserted into a gap formed between the mounting surface 22b and the locking portions 22c and 22d. The manufacturing process can be simplified compared to the conventional case where the fixing member is fixed to the mounting surface 22b, and can be stably fixed on the mounting surface 22b by the locking portions 22c and 22d. It is possible to obtain a structure that is less susceptible to influence.

また、回転検出装置Ａは、ハウジング１の内壁に設けられホルダー部材２をハウジング１の底面１ｅ側に案内するための案内片１ｆと、案内片１ｆに対応するようにホルダー部材２に設けられる案内溝２２ｅとを備え、案内溝２２ｅを案内片１ｆを沿わせた状態にてホルダー部材２をハウジング１内にスライド移動させてホルダー部材２のヘッド部２１をハウジング１内の適正位置に配設した際に、ホルダー部材２に搭載される磁気検出素子４５がハウジング１に設けられた磁気検出面１ａに当接するように構成するものであり、ホルダー部材２におけるヘッド部２１をハウジング１内の適正位置に正確に配設することが可能となり、磁気検出精度を向上させることができる。   The rotation detection device A is provided on the inner wall of the housing 1 for guiding the holder member 2 toward the bottom surface 1e of the housing 1, and the guide provided on the holder member 2 so as to correspond to the guide piece 1f. The holder member 2 is slid into the housing 1 with the guide groove 22e along the guide piece 1f, and the head portion 21 of the holder member 2 is disposed at an appropriate position in the housing 1. At this time, the magnetic detection element 45 mounted on the holder member 2 is configured to come into contact with the magnetic detection surface 1 a provided in the housing 1, and the head portion 21 in the holder member 2 is positioned at an appropriate position in the housing 1. The magnetic detection accuracy can be improved.

また、回転検出装置Ａは、ホルダー部材２のヘッド部２１に磁石３及び磁気検出素子４を順次配設するための第１，第２の凹部２１ａ，２１ｂからなる収納部と、この収納部と案内溝２２ｅとを連通する連通孔２１ｃとを備え、ハウジング１の案内片１ｆを磁気検出面１ａに近づくに連れてヘッド部２１の配設空間が狭まるような傾斜形状とし、ホルダー部材２をハウジング１の適正位置に嵌め込んだ際に、磁石３及び磁気検出素子４を案内片１ｆの一部分によって磁気検出面１ａ方向へ押し圧してなるものであり、磁気ヘッド２１と磁気検出面１ａ（ハウジング１）との密着性を良好に確保できることから、磁気検出精度を更に向上させることが可能となる。   Further, the rotation detection device A includes a storage portion including first and second recesses 21a and 21b for sequentially disposing the magnet 3 and the magnetic detection element 4 on the head portion 21 of the holder member 2, and the storage portion. A communication hole 21c communicating with the guide groove 22e is provided, and the guide piece 1f of the housing 1 is formed in an inclined shape so that the space for disposing the head portion 21 decreases as the magnetic detection surface 1a is approached. When the magnet 3 and the magnetic detection element 4 are pressed in the proper position 1, the magnetic head 21 and the magnetic detection surface 1 a (housing 1) are pressed against the magnetic detection surface 1 a by a part of the guide piece 1 f. The magnetic detection accuracy can be further improved.

本発明の実施形態では、ホルダー部材２の載置面２２ｂに二組の係止部２２ｃ，２２ｄを形成し、回路基板５を固定する構造を採用しているが、本発明にあっては、少なくとも一組（一対の）の係止部（支持部）を形成するものであれば良い。   In the embodiment of the present invention, a structure in which two sets of locking portions 22c and 22d are formed on the mounting surface 22b of the holder member 2 and the circuit board 5 is fixed is adopted. What is necessary is just to form at least one set (a pair) of locking portions (supporting portions).

本発明の構成は、回転検出装置のみならず、例えば直線運動する被検出体の移動状態を検出する移動状態検出装置に適用しても良く、本発明は前述した実施形態に限定されるものではない。   The configuration of the present invention may be applied not only to the rotation detection device but also to, for example, a movement state detection device that detects a movement state of a detected object that moves linearly, and the present invention is not limited to the above-described embodiment. Absent.

本発明の実施形態の回転検出装置を示す斜視図。The perspective view which shows the rotation detection apparatus of embodiment of this invention. 同上実施形態の回転検出装置の要部断面図。Sectional drawing of the principal part of the rotation detection apparatus of embodiment same as the above. 同上実施形態の回転検出装置のハウジングを示す要部断面図。The principal part sectional drawing which shows the housing of the rotation detection apparatus of embodiment same as the above. 同上実施形態の回転検出装置のハウジングを示す平面図。The top view which shows the housing of the rotation detection apparatus of embodiment same as the above. 同上実施形態の回転検出装置のホルダー部材を示す要部断面図。The principal part sectional drawing which shows the holder member of the rotation detection apparatus of embodiment same as the above. 同上実施形態の回転検出装置のホルダー部材を示す平面図。The top view which shows the holder member of the rotation detection apparatus of embodiment same as the above.

Ａ 回転検出装置（移動物体検出装置）
Ｓ 導出路
１ ハウジング
１ａ 磁気検出面
１ｅ 底面
１ｆ 案内片
１ｇ 溝部
２ ホルダー部材
２１ ヘッド部
２１ａ 第１の凹部
２１ｂ 第２の凹部
２１ｃ 連通孔
２２ ボディー部
２２ｂ 載置面
２２ｃ 係止部（支持部）
２２ｄ 係止部（支持部）
３ 磁石
４ 磁気検出素子
５ 回路基板
５ａ 幅狭部
５ｂ 幅広部
７ 充填部材
A Rotation detection device (moving object detection device)
S Leading path 1 Housing 1a Magnetic detection surface 1e Bottom surface 1f Guide piece 1g Groove portion 2 Holder member 21 Head portion 21a First concave portion 21b Second concave portion 21c Communication hole 22 Body portion 22b Mounting surface 22c Locking portion (supporting portion)
22d Locking part (supporting part)
3 Magnet 4 Magnetic detection element 5 Circuit board 5a Narrow part 5b Wide part 7 Filling member

Claims (4)

磁気検出素子と、前記磁気検出素子と電気的に接触する回路基板と、前記磁気検出素子に磁場を与える磁石とを樹脂製ハウジング内に配設するとともに、前記ハウジング内に充填部材を充填してなる移動物体検出装置であって、
前記磁石及び前記磁気検出素子を配設するためのヘッド部と、前記ヘッド部から延長形成され前記回路基板を配設するためのボディー部とを有するホルダー部材を前記ハウジング内に備え、前記ホルダー部材の前記回路基板を配設するための載置面は、前記ヘッド部の近傍が他の載置面と比べ幅狭となる小径部を有すると共に、前記回路基板は前記載置面の形状に合う幅狭部を有することを特徴とする移動物体検出装置。 A magnetic detection element, a circuit board that is in electrical contact with the magnetic detection element, and a magnet that applies a magnetic field to the magnetic detection element are disposed in a resin housing, and a filling member is filled in the housing. A moving object detection device comprising:
A holder member having a head portion for disposing the magnet and the magnetic detection element and a body portion extending from the head portion and disposing the circuit board is provided in the housing, and the holder member The mounting surface for arranging the circuit board has a small-diameter portion in which the vicinity of the head portion is narrower than other mounting surfaces, and the circuit board matches the shape of the mounting surface. A moving object detection apparatus having a narrow part . 前記ボディー部は、前記回路基板を支持する少なくとも一対の支持部を有してなることを特徴とする請求項１に記載の移動物体検出装置。   The moving object detection device according to claim 1, wherein the body portion includes at least a pair of support portions that support the circuit board. 前記ハウジング内に設けられ前記ホルダー部材を底面方向に案内する案内片と、前記ホルダー部材に設けられ前記案内片に対応する溝部とを備え、前記案内溝を前記案内片を沿わせた状態にて前記ホルダー部材を前記ハウジング内にスライド移動させて前記ヘッド部を前記ハウジング内の適正位置に配設した際に、前記ホルダー部材に配設される前記磁気検出素子が前記ハウジングに設けられた磁気検出面に当接することを特徴とする請求項１に記載の移動物体検出装置。   A guide piece provided in the housing for guiding the holder member in a bottom direction; and a groove portion provided in the holder member and corresponding to the guide piece, wherein the guide groove is arranged along the guide piece. When the holder member is slid into the housing and the head portion is disposed at an appropriate position in the housing, the magnetic detection element disposed in the holder member is provided with the magnetic detection provided in the housing. The moving object detection device according to claim 1, wherein the moving object detection device is in contact with a surface. 前記ヘッド部に前記磁石及び前記磁気検出素子を順次配設するための収納部と、前記収納部と前記案内溝とを連通する連通孔とを備え、前記案内片を前記磁気検出面に近づくに連れて前記ヘッド部の配設空間が狭まるような傾斜形状とし、前記ホルダー部材を前記ハウジングの適正位置に嵌め込んだ際に、前記磁石及び前記磁気検出素子を前記案内片の一部分によって前記磁気検出面方向へ押し圧してなることを特徴とする請求項３に記載の移動物体検出装置。 The head portion includes a storage portion for sequentially disposing the magnet and the magnetic detection element, and a communication hole that communicates the storage portion and the guide groove, and the guide piece approaches the magnetic detection surface. Accordingly, when the holder member is fitted in an appropriate position of the housing, the magnet and the magnetic detection element are partially detected by the part of the guide piece when the holder member is fitted in an appropriate position. The moving object detection device according to claim 3 , wherein the moving object detection device is pressed in a surface direction.

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