JP5146901B2 - Rotation detector - Google Patents

Rotation detector Download PDF

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JP5146901B2
JP5146901B2 JP2006354404A JP2006354404A JP5146901B2 JP 5146901 B2 JP5146901 B2 JP 5146901B2 JP 2006354404 A JP2006354404 A JP 2006354404A JP 2006354404 A JP2006354404 A JP 2006354404A JP 5146901 B2 JP5146901 B2 JP 5146901B2
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case
standing wall
filling member
middle case
outer case
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JP2008164439A (en
JP2008164439A5 (en
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純一 安藤
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Nippon Seiki Co Ltd
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Nippon Seiki Co Ltd
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Priority to JP2006354404A priority Critical patent/JP5146901B2/en
Priority to PCT/JP2007/073992 priority patent/WO2008081694A1/en
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01P—MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION, OR SHOCK; INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT
    • G01P1/00—Details of instruments
    • G01P1/02—Housings
    • G01P1/026—Housings for speed measuring devices, e.g. pulse generator
    • 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
    • G01D11/00—Component parts of measuring arrangements not specially adapted for a specific variable
    • G01D11/24—Housings ; Casings for instruments
    • G01D11/245—Housings for sensors
    • 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
    • G01D5/142—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 using Hall-effect devices
    • G01D5/147—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 using Hall-effect devices influenced by the movement of a third element, the position of Hall device and the source of magnetic field being fixed in respect to each other

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measuring Magnetic Variables (AREA)

Description

本発明は、磁石と磁気検出手段と回路基板とを少なくとも備えた中ケースと、前記中ケースを収納する収納空間を備えた外ケースと、前記収納空間に配設される充填部材とを備えた回転検出装置に関するものである。   The present invention includes an intermediate case including at least a magnet, magnetic detection means, and a circuit board, an outer case including a storage space for storing the intermediate case, and a filling member disposed in the storage space. The present invention relates to a rotation detection device.

従来の回転検出装置は特許文献１に開示されるものが知られている。この回転検出装置は、磁石と磁気検出手段とを少なくとも備えた中ケースと、前記中ケースを収納する収納空間を備えた外ケースと、前記収納空間に配設される充填部材とを備えた回転検出装置である。
特開２００４−３５４３１２号公報 As a conventional rotation detection device, one disclosed in Patent Document 1 is known. This rotation detection device includes a middle case provided with at least a magnet and magnetic detection means, an outer case provided with a storage space for storing the middle case, and a rotation provided with a filling member disposed in the storage space. It is a detection device.
JP 2004-354212 A

しかしながら、中ケースと充填部材との熱膨張係数の違いによる変位によって、中ケースと充填部材とが剥離し、中ケースと充填部材との間に、異物（水や油など）が浸入し、前記回路基板に悪影響を与える虞があるといった問題点を有している。   However, due to the displacement due to the difference in thermal expansion coefficient between the middle case and the filling member, the middle case and the filling member are separated, and foreign matter (water, oil, etc.) enters between the middle case and the filling member, There is a problem that the circuit board may be adversely affected.

そこで、前述した問題点に着目し、中ケースと充填部材との熱膨張係数の違いによる変位を抑制し防水性を向上させることが可能な回転検出装置を提供することを目的とする。   In view of the above-described problems, an object of the present invention is to provide a rotation detection device capable of suppressing the displacement due to the difference in thermal expansion coefficient between the middle case and the filling member and improving the waterproof property.

本発明では、請求項１に記載のように、磁石と磁気検出手段とを少なくとも備えた中ケースと、前記中ケースを収納する収納空間を備えた外ケースと、前記収納空間に配設される充填部材とを備えた回転検出装置であって、前記中ケースの胴部の全周に前記充填部材の変位を抑制する段差部を備えてなるものである。
In the present invention, as described in claim 1, an intermediate case including at least a magnet and a magnetic detection means, an outer case including a storage space for storing the intermediate case, and the storage space are disposed. A rotation detecting device including a filling member, comprising a step portion for suppressing displacement of the filling member on the entire circumference of the body portion of the middle case.

また、請求項２に記載のように、前記段差部は、前記中ケースを前記外ケースに収納する収納方向に対して略垂直方向に設けられてなるものである。   According to a second aspect of the present invention, the step portion is provided in a direction substantially perpendicular to the storage direction in which the middle case is stored in the outer case.

また、請求項３に記載のように、前記段差部は、前記胴部に複数設けられてなるものである。
According to a third aspect of the present invention, a plurality of the step portions are provided on the body portion.

また、請求項４に記載のように、前記段差部は、立壁部もしくは凹部からなるものである。
According to a fourth aspect of the present invention, the step portion is a standing wall portion or a concave portion.

また、請求項５に記載のように、前記段差部は、第１，第２の段差部から構成され、前記第１の段差部は、前記第２の段差部に対して高さが異なるように設けられてなるものである。
According to a fifth aspect of the present invention, the step portion is composed of first and second step portions, and the first step portion has a height different from that of the second step portion. It is provided.

また、請求項６に記載のように、前記段差部は、第１，第２の立壁部から構成され、前記第１の立壁部は前記中ケースの胴部から第１の方向に延設されるとともに、前記第２の立壁部は、前記胴部から前記第１の方向とは異なる第２の方向へ延設されてなるものである。
According to a sixth aspect of the present invention, the step portion is composed of first and second standing wall portions, and the first standing wall portion extends from the trunk portion of the middle case in the first direction. In addition, the second standing wall portion extends from the body portion in a second direction different from the first direction.

以上、本発明によれば、所期の目的を達成することができ、中ケースと充填部材との熱膨張係数の違いによる変位を抑制し防水性を向上させることが可能な回転検出装置を提供することができる。   As described above, according to the present invention, it is possible to provide a rotation detection device that can achieve the intended purpose and can suppress the displacement due to the difference in thermal expansion coefficient between the middle case and the filling member and improve the waterproof property. can do.

本発明の請求項１に記載による回転検出装置Ａは、磁石１１と磁気検出手段１２とを少なくとも備えた中ケース３と、中ケース３を収納する収納空間Ｓを備えた外ケース４と、収納空間Ｓに配設される充填部材５とを備えた回転検出装置Ａであって、中ケース３の胴部３２の全周に充填部材５の変位を抑制する段差部６を備えてなるものである。このように構成することにより、中ケース３に段差部６を設けることによって中ケース３と充填部材５との熱膨張係数の違いにより中ケース３が充填部材５に対して変位することを抑制することができるため、防水性を向上させることが可能な回転検出装置を提供することができる。さらに、段差部６を全周に設けたことによって、段差部６の投影面積が大きくなることより、中ケース３が充填部材５に対して変位することをより抑制することができる。
The rotation detection device A according to claim 1 of the present invention includes an intermediate case 3 having at least a magnet 11 and magnetic detection means 12, an outer case 4 having a storage space S for storing the intermediate case 3, and a storage. The rotation detection device A includes a filling member 5 disposed in the space S, and includes a step portion 6 that suppresses the displacement of the filling member 5 on the entire circumference of the body portion 32 of the middle case 3. is there. With this configuration, by providing the step portion 6 in the middle case 3, the middle case 3 is prevented from being displaced with respect to the filling member 5 due to a difference in thermal expansion coefficient between the middle case 3 and the filling member 5. Therefore, it is possible to provide a rotation detection device that can improve waterproofness. Furthermore, by providing the stepped portion 6 on the entire circumference, the projected area of the stepped portion 6 is increased, so that the displacement of the middle case 3 with respect to the filling member 5 can be further suppressed.

また、請求項２に記載の発明によれば、段差部６は、中ケース３を外ケース４に収納する収納方向に対して略垂直方向に設けられてなるものである。このように構成することにより、中ケース３と充填部材５との熱膨張係数の違いにより中ケース３が充填部材５に対して変位することを抑制することができるため、より防水性を向上させることが可能な回転検出装置を提供することができる。 According to the second aspect of the present invention, the step portion 6 is provided in a direction substantially perpendicular to the storage direction in which the intermediate case 3 is stored in the outer case 4. By comprising in this way, since it can suppress that the middle case 3 displaces with respect to the filling member 5 by the difference in the thermal expansion coefficient of the middle case 3 and the filling member 5, it improves waterproofness more. It is possible to provide a rotation detection device that can perform the above operation.

また、請求項３に記載の発明によれば、段差部６は、胴部３２に複数設けられてなるものである。このように構成することにより、段差部６を中ケース３に複数設けたことによって、段差部６の投影面積が大きくなることにより、中ケース３が充填部材５に対して変位することをより抑制することができる。
According to the invention described in claim 3 , a plurality of the step portions 6 are provided in the body portion 32. With this configuration, by providing a plurality of stepped portions 6 in the middle case 3, the projected area of the stepped portion 6 is increased, thereby preventing the middle case 3 from being displaced with respect to the filling member 5. can do.

また、請求項４に記載の発明によれば、段差部６は、立壁部もしくは凹部からなるものである。このように構成することにより、段差部６を立壁部もしくは凹部から構成することで、中ケース３の構成を複雑にすることなく充填部材５に対する変位を抑制することができる。
According to the invention described in claim 4 , the stepped portion 6 is a standing wall portion or a recessed portion. By comprising in this way, the level | step-difference part 6 can be comprised from a standing wall part or a recessed part, and the displacement with respect to the filling member 5 can be suppressed, without complicating the structure of the middle case 3. FIG.

また、請求項５に記載の発明によれば、段差部６は、第１，第２の段差部６ａ，６ｂから構成され、第１の段差部６ａは、第２の段差部６ｂに対して高さが異なるように設けられてなるものである。このように構成することにより、段差部６の高さを変えたことによって、外ケース４と中ケース３との収納空間Ｓへ充填部材５を良好に充填することができる。
According to the invention described in claim 5 , the stepped portion 6 is composed of first and second stepped portions 6 a and 6 b, and the first stepped portion 6 a is in contrast to the second stepped portion 6 b. They are provided with different heights. By configuring in this way, the filling member 5 can be satisfactorily filled into the storage space S of the outer case 4 and the middle case 3 by changing the height of the stepped portion 6.

また、請求項６に記載の発明によれば、段差部６は、第１，第２の立壁部６ａ，６ｂから構成され、第１の立壁部６ａは中ケース３の胴部３２から第１の方向に延設されるとともに、第２の立壁部６ｂは、胴部３２から第１の方向とは異なる第２の方向へ延設されてなるものである。このように構成することにより、立壁部６ａ，６ｂの延設方向を変えたことによって、請求項６と同様に外ケース４と中ケース３との収納空間Ｓへ充填部材５を良好に充填することができる。
According to the sixth aspect of the present invention, the step portion 6 is composed of the first and second standing wall portions 6 a and 6 b, and the first standing wall portion 6 a is first to the first trunk portion 32 of the middle case 3. The second upright wall portion 6b extends from the body portion 32 in a second direction different from the first direction. With this configuration, the filling member 5 is satisfactorily filled into the storage space S between the outer case 4 and the middle case 3 in the same manner as in the sixth aspect by changing the extending direction of the standing wall portions 6a and 6b. be able to.

以下、本発明の回転検出装置Ａについて例を挙げ添付図面を用いて説明する。   Hereinafter, an example of the rotation detection device A of the present invention will be described with reference to the accompanying drawings.

図１から図８を用いて、本発明の第１実施例の回転検出装置Ａについて説明する。図１において、回転検出装置Ａは、磁気ヘッド１と、回路基板２と、中ケース３と外ケース４と、充填部材５と、から主に構成されている。   A rotation detection apparatus A according to a first embodiment of the present invention will be described with reference to FIGS. In FIG. 1, the rotation detection device A mainly includes a magnetic head 1, a circuit board 2, an intermediate case 3, an outer case 4, and a filling member 5.

磁気ヘッド１は、磁石１１と、磁気検出手段１２とから構成されるものである。磁石１１は、円筒形状をなしている。磁気検出手段１２は、合成樹脂からなるハウジング内にホールＩＣや磁気抵抗素子（ＭＲ素子）等を内蔵したものであり、磁石１１が発する磁気の変化を検出するもので、磁石１１と接するように配設される。   The magnetic head 1 is composed of a magnet 11 and magnetic detection means 12. The magnet 11 has a cylindrical shape. The magnetism detecting means 12 is a housing in which a Hall IC, a magnetoresistive element (MR element) or the like is built in a housing made of a synthetic resin, detects a change in magnetism generated by the magnet 11 and is in contact with the magnet 11. Arranged.

回路基板２は、ガラス布基材エポキシ樹脂やセラミック等の絶縁基板に所定の配線パターンが形成されてなる硬質回路基板である。なお、硬質の回路基板の他に、可撓性材料に所定の配線パターンが形成されてなるフレキシブル回路基板（ＦＰＣ）が適用できる。回路基板２は、磁気検出手段１２へのノイズ吸収用コンデンサや信号増幅回路等の各種電子部品（図示しない）が実装されている。回路基板２の一端側には、磁気検出手段１２の略Ｌ字状に折り曲げ形成されたリード１２ａが半田等を介して電気的に接続され、また他端側には、後述するリード端子が半田等を介して電気的に接続されている。従って、磁気検出手段１２により検出された検出信号は、回路基板２から前記リード端子に伝わり外部に取り出されることになる。 Circuitry substrate 2 is a rigid circuit board having wiring patterns on the insulating substrate of glass cloth-based epoxy resin or ceramic is formed. In addition to a hard circuit board, a flexible circuit board (FPC) in which a predetermined wiring pattern is formed on a flexible material can be applied. On the circuit board 2, various electronic components (not shown) such as a noise absorbing capacitor and a signal amplifier circuit are mounted on the magnetic detection means 12. A lead 12a bent in a substantially L shape of the magnetic detection means 12 is electrically connected to one end side of the circuit board 2 via solder or the like, and a lead terminal described later is soldered to the other end side. Etc. are electrically connected to each other. Therefore, the detection signal detected by the magnetic detection means 12 is transmitted from the circuit board 2 to the lead terminal and taken out to the outside.

中ケース３は、ＳＰＳ，ＰＢＴ及びＰＰＳ等の合成樹脂材料が適用でき、図３で示すように、ヘッド部３１と、胴部３２と、取付部３３を一体に備えている。   Synthetic resin materials such as SPS, PBT, and PPS can be applied to the middle case 3, and as shown in FIG. 3, the head portion 31, the body portion 32, and the attachment portion 33 are integrally provided.

ヘッド部３１には、磁石１１と磁気検出手段１２とが中ケース３の先端面側に設けられ、ヘッド部３１と胴部３２との一部に回路基板２を配設するための載置部３１ｃが設けられている。なお、回路基板２は、外ケース４に当接しない位置に設けられる。また、ヘッド部３１には、磁気検出手段１２および磁石１１の側面の一部を開口するとともに、磁石１１の裏面側の一部を溝形状にしてなる切り欠き部３１ａが形成されている。   In the head portion 31, the magnet 11 and the magnetic detection means 12 are provided on the front end surface side of the middle case 3, and a mounting portion for disposing the circuit board 2 in a part of the head portion 31 and the trunk portion 32. 31c is provided. The circuit board 2 is provided at a position where it does not contact the outer case 4. In addition, the head portion 31 is formed with a notch 31 a that opens part of the side surfaces of the magnetic detection means 12 and the magnet 11 and that forms a part of the back side of the magnet 11 in a groove shape.

胴部３２には、導電性材料から形成されるリード端子７がインサート成形されており、一端にはコネクタ部８が一体に設けられている。リード端子７は、磁気検出手段１２への電力供給用及び磁気検出手段１２からの信号出力用に複数設けられている。そして、リード端子７は、一端がコネクタ部８において外部に突出し、他端が回路基板２と電気的に接続できるように引き出されている。コネクタ部８は、各リード端子７を外部機器と電気的に接続させ、前記外部機器との嵌合方向を後述する外ケース４の収納空間の開口方向と一致している。   A lead terminal 7 made of a conductive material is insert-molded in the body portion 32, and a connector portion 8 is integrally provided at one end. A plurality of lead terminals 7 are provided for supplying power to the magnetic detection means 12 and for outputting signals from the magnetic detection means 12. The lead terminal 7 is drawn out so that one end protrudes to the outside at the connector portion 8 and the other end can be electrically connected to the circuit board 2. The connector portion 8 electrically connects each lead terminal 7 to an external device, and the fitting direction with the external device coincides with the opening direction of the storage space of the outer case 4 described later.

また、胴部３２は、図２で示すように、外ケース４から露出する部分に、外ケース４に収納される部分から右方向に直角に折れ曲がってから再び図２中上方向に直角に折れ曲がっている屈曲部３２ａを備えている。 Further, as shown in FIG. 2, the body portion 32 is bent at a right angle from the portion accommodated in the outer case 4 to the portion exposed from the outer case 4, and then bent at a right angle upward in FIG. 2 again. The bent portion 32a is provided.

また、中ケース３は、段差部である立壁部６が設けられている。立壁部６は、複数設けられており、本実施例では、第１，第２の立壁部６ａ，６ｂから構成されている。この第１，第２の立壁部６ａ，６ｂは中ケース３を外ケース４に収納する収納方向に対して略垂直方向に設けられている。   Further, the middle case 3 is provided with a standing wall portion 6 that is a stepped portion. A plurality of the standing wall portions 6 are provided, and in this embodiment, the standing wall portion 6 is composed of first and second standing wall portions 6a and 6b. The first and second standing wall portions 6 a and 6 b are provided in a direction substantially perpendicular to the storage direction in which the middle case 3 is stored in the outer case 4.

なお、第１の立壁部６ａは、図４中の矢印で示す水平方向に延接されており、第２の立壁部６ｂは、図５中に示すように、中ケース３の胴部３２の全周に設けられている。また、第２の立壁部６ｂは、第１の立壁部６ａの第１の方向とは異なる第２の方向（図５中の矢印で示す方向）へも延設されている。また、第１の立壁部６ａは、第２の立壁部６ｂに対して図４中の矢印方向の高さが異なるように設けられている。本実施例では、図４中の矢印方向において、第１の立壁部６ａは、第２の立壁部６ｂより高くなるように形成されている。   In addition, the 1st standing wall part 6a is extended in the horizontal direction shown by the arrow in FIG. 4, and the 2nd standing wall part 6b is shown in FIG. It is provided all around. Moreover, the 2nd standing wall part 6b is extended also in the 2nd direction (direction shown by the arrow in FIG. 5) different from the 1st direction of the 1st standing wall part 6a. Further, the first standing wall portion 6a is provided so that the height in the arrow direction in FIG. 4 is different from that of the second standing wall portion 6b. In the present embodiment, the first standing wall 6a is formed to be higher than the second standing wall 6b in the direction of the arrow in FIG.

取付部３３は、壁部を構成するものであり、中ケース３の胴部３２で、ヘッド部３１側の外周に、回路基板２が配設される載置部３１ｃと別の箇所に設けられており、突出する平板形状のものが２つ形成されてなる。この取付部３３には、さらに横方向に突出した圧入部３３ａが設けられている。   The attachment portion 33 constitutes a wall portion, and is provided on the outer periphery on the head portion 31 side at a portion different from the placement portion 31c on which the circuit board 2 is disposed, in the body portion 32 of the middle case 3. Two projecting plate-shaped ones are formed. The mounting portion 33 is further provided with a press-fit portion 33a protruding in the lateral direction.

外ケース４は、中ケース３と同様な合成樹脂材料を適用することができ、長手方向の断面形状が略コの字状をなして一端に開口９を有し、他方に底部４ａを有する円筒状からなり、磁気ヘッド１および回路基板２を収納する収納空間Ｓを構成する。外ケース４は、磁気検出手段１２に対向して当接する底部４ａが回転検出装置Ａの検出面となる。   A synthetic resin material similar to that of the inner case 3 can be applied to the outer case 4. The outer case 4 has a substantially U-shaped cross section in the longitudinal direction and has an opening 9 at one end and a bottom 4 a at the other end. A storage space S for storing the magnetic head 1 and the circuit board 2 is formed. In the outer case 4, a bottom portion 4 a that contacts and faces the magnetic detection means 12 serves as a detection surface of the rotation detection device A.

また、外ケース４の内壁部には、図６，図７に示すように中ケース３の取付部３３の形状に対応した溝形状の位置決め保持部４１が形成されている。位置決め保持部４１には、取付部３３の当接部分に変形可能なリブ（圧入用の突出部）４１ａが形成されている。このリブ４１ａと、中ケース３に設けた圧入部３３ａとは、リブ４１ａは矢印Ｈの方向であり、圧入部３３ａは矢印Ｇ方向を向いており、その突出方向が直角に交わっており、中ケース３は、外ケース４に対して、Ｘ−Ｙ方向に圧入保持される。このような圧入部３３ａとリブ４１ａとを設けることによって、中ケース３と外ケース４との収納方向における全長が長くなった場合であっても、中ケース３を外ケース４に対して傾いて固定することを防止し、磁気検出手段１２の検出面と外ケース４の底部４ａとの間に間隙が生じることがなく、検出精度の低下を防止することができる。 Further, as shown in FIGS. 6 and 7, a groove-shaped positioning holding portion 41 corresponding to the shape of the mounting portion 33 of the middle case 3 is formed on the inner wall portion of the outer case 4. The positioning holding portion 41 is formed with a deformable rib (press-fit protrusion) 41 a at the contact portion of the mounting portion 33. The rib 41a and the press-fit portion 33a provided in the middle case 3 are such that the rib 41a is in the direction of arrow H , the press-fit portion 33a is in the direction of arrow G, and the protruding direction intersects at right angles. The case 3 is press-fitted and held in the XY direction with respect to the outer case 4. By providing the press-fit portion 33a and the rib 41a, the middle case 3 is inclined with respect to the outer case 4 even when the overall length of the middle case 3 and the outer case 4 is increased. It is possible to prevent fixation, and no gap is generated between the detection surface of the magnetic detection means 12 and the bottom portion 4a of the outer case 4, so that a decrease in detection accuracy can be prevented.

また、保持部４１の外ケース４の開口９側には、開口９側が幅広となる斜め形状のガイド部４１ｂが位置決め保持部４１に連続して形成され、取付部３３を位置決め保持部４１の溝部分に誘い込むことができる。また、外ケース４は、図３に示すように、回転検出装置Ａ全体を所望の配設位置に固定するための取付部４２を設けている。取付部４２は、取付用の孔部４２ａを有する金属材料からなるカラー４２ｂがインサート成形されている。   In addition, on the opening 9 side of the outer case 4 of the holding portion 41, an inclined guide portion 41 b having a wide opening 9 side is formed continuously with the positioning holding portion 41, and the mounting portion 33 is formed in the groove of the positioning holding portion 41. You can lure into the part. Further, as shown in FIG. 3, the outer case 4 is provided with an attachment portion 42 for fixing the entire rotation detection device A at a desired arrangement position. The mounting portion 42 is insert-molded with a collar 42b made of a metal material having a mounting hole 42a.

充填部材５は、やや流動性のあるエポキシ樹脂やシリコーン樹脂が適用でき、外ケース４と中ケース３との隙間となる収納空間Ｓに充填される。充填部材５は、外ケース４と中ケース３とを組み付けた状態で、底部４ａ側から注入され、少なくとも取付部３３と位置決め保持部４１との当接箇所や磁気ヘッド１と回路基板２とを配設したヘッド部３１を埋設する位置まで注入される。   The filling member 5 can be applied with a somewhat fluid epoxy resin or silicone resin, and is filled in the storage space S that becomes a gap between the outer case 4 and the middle case 3. The filling member 5 is injected from the bottom 4a side in a state where the outer case 4 and the middle case 3 are assembled, and at least a contact portion between the mounting portion 33 and the positioning holding portion 41 and the magnetic head 1 and the circuit board 2 are connected. Injection is performed up to the position where the arranged head portion 31 is embedded.

なお、充填部材５の収納空間Ｓへの注入工程において、外ケース４の開口９から充填部材５の注入装置のノズルを収納空間Ｓに対して真上から挿入して、充填部材５を収納空間Ｓ内へ充填する。   In the injection process of the filling member 5 into the storage space S, the nozzle of the injection device of the filling member 5 is inserted from above the opening 9 of the outer case 4 with respect to the storage space S, and the filling member 5 is stored in the storage space. Fill into S.

そして、充填部材５が磁石１１及び磁気検出手段１２と中ケース３との隙間に入り込みながら気密状態をなしている。充填部材５は、充填された後に硬化することで、磁気ヘッド１や回路基板２の電子部品に対して、気密性を保持するとともに、固定保持することができ、耐振、耐寒、耐熱、耐水等の耐久性を向上するものである。   The filling member 5 is in an airtight state while entering the gap between the magnet 11 and the magnetic detection means 12 and the middle case 3. The filling member 5 is hardened after being filled, so that the airtightness can be held and fixedly held with respect to the electronic components of the magnetic head 1 and the circuit board 2, and vibration resistance, cold resistance, heat resistance, water resistance, etc. This improves the durability.

また、位置決め保持部４１は、外ケース４の収納空間Ｓ内に位置するように設けられることによって、取付部３３と位置決め保持部４１との隙間を充填部材５によって埋めることのできる構造となり、硬化した充填部材５によって外ケース４に対する中ケース３の強固な固定保持を行うことができるため、振動等による磁気ヘッド１の位置ずれを生じることなく、耐久性が高く検出精度の良好な回転検出装置Ａとなる。   In addition, the positioning holding portion 41 is provided so as to be positioned in the storage space S of the outer case 4, so that the gap between the attachment portion 33 and the positioning holding portion 41 can be filled with the filling member 5 and cured. Since the middle case 3 can be firmly fixed and held by the filled member 5 with respect to the outer case 4, the rotation detection device has high durability and good detection accuracy without causing positional deviation of the magnetic head 1 due to vibration or the like. A.

また、取付部３３または位置決め保持部４１の少なくとも一方には、取付部３３と位置決め保持部４１との当接箇所においてリブ４１ａが設けられてなることによって、圧入時のがたつきを防止することができ、充填部材５の充填時や硬化時までに安定状態を良好に保つことができるため、外ケース４に対して所望の位置に磁気ヘッド１を精度良く配設することができ、検出精度の良好な回転検出装置Ａとなる。   Further, at least one of the mounting portion 33 and the positioning holding portion 41 is provided with a rib 41a at a contact portion between the mounting portion 33 and the positioning holding portion 41, thereby preventing rattling during press-fitting. Since the stable state can be maintained well until the filling member 5 is filled or cured, the magnetic head 1 can be accurately arranged at a desired position with respect to the outer case 4, and the detection accuracy can be improved. The rotation detection device A is excellent.

なお、本発明の第１の実施例では、上述した回転検出装置Ａについて例に挙げて説明したが、本発明はこれに限定されるものではなく、外ケースによって囲まれる空間内に充填部材が充填される回転検出装置に適応されるものであればよい。   In the first embodiment of the present invention, the above-described rotation detection device A has been described as an example. However, the present invention is not limited to this, and a filling member is provided in a space surrounded by the outer case. What is necessary is just to be applicable to the rotation detection apparatus with which it is filled.

また、上述した第１の実施例では、中ケース３に取付部３３を設け、外ケース４に取付部３３に対応した位置決め保持部４１を設けたものを例に挙げて説明したが、本発明はこれに限定されるものではなく、例えば、外ケース４の内壁部に突出した平板状の取付部を設け、中ケース３の外周部に前記取付部を保持する位置決め保持部を設けた構成であってもよく、上述した実施の形態と同様な効果を得ることができる。   In the first embodiment described above, the middle case 3 is provided with the mounting portion 33 and the outer case 4 is provided with the positioning holding portion 41 corresponding to the mounting portion 33 as an example. However, the present invention is not limited to this. For example, a flat plate-like mounting portion that protrudes from the inner wall portion of the outer case 4 is provided, and a positioning holding portion that holds the mounting portion is provided on the outer peripheral portion of the middle case 3. It is possible to obtain the same effects as those of the above-described embodiment.

また、前記実施例においては、段差部は、立壁部であったが、前記実施例に限定される物ではなく、凹部からなるものであってもよい。   Moreover, in the said Example, although the level | step-difference part was a standing wall part, it may not consist of a thing limited to the said Example but may consist of a recessed part.

本発明の第１実施例の正面図。The front view of 1st Example of this invention. 同実施例の側面図。The side view of the Example. 図２中Ｂ−Ｂ線の断面図。Sectional drawing of the BB line in FIG. 図３中Ｃ−Ｃ線の断面図。Sectional drawing of CC line in FIG. 図３中Ｄ−Ｄ線の断面図。Sectional drawing of the DD line in FIG. 図３中Ｅ−Ｅ線の断面図。Sectional drawing of the EE line in FIG. 外ケースの断面図。Sectional drawing of an outer case. 中ケースの側面図。The side view of a middle case.

符号の説明Explanation of symbols

Ａ 回転検出装置
３ 中ケース
４ 外ケース
５ ポッティング剤（充填部材）
６ 立壁部（段差部）
１１ 磁石
１２ 磁気検出手段
３２ 胴部
Ｓ 収納空間 A Rotation detector 3 Middle case 4 Outer case 5 Potting agent (filling member)
6 Standing wall (step)
11 Magnet 12 Magnetic detection means 32 Body S Storage space

Claims (6)

磁石と磁気検出手段とを少なくとも備えた中ケースと、前記中ケースを収納する収納空間を備えた外ケースと、前記収納空間に配設される充填部材とを備えた回転検出装置であって、前記中ケースの胴部の全周に前記充填部材の変位を抑制する段差部を備えてなることを特徴とする回転検出装置。 A rotation detection device comprising: an intermediate case including at least a magnet and magnetic detection means; an outer case including a storage space for storing the intermediate case; and a filling member disposed in the storage space; A rotation detecting device comprising a step portion for suppressing displacement of the filling member on the entire circumference of the body portion of the middle case. 前記段差部は、前記中ケースを前記外ケースに収納する収納方向に対して略垂直方向に設けられてなることを特徴とする請求項１に記載の回転検出装置。 The rotation detecting device according to claim 1, wherein the stepped portion is provided in a direction substantially perpendicular to a storage direction in which the middle case is stored in the outer case. 前記段差部は、前記胴部に複数設けられてなることを特徴とする請求項１に記載の回転検出装置。 The rotation detecting device according to claim 1, wherein a plurality of the stepped portions are provided in the body portion. 前記段差部は、立壁部もしくは凹部からなることを特徴とする請求項１から請求項３の何れかに記載の回転検出装置。 The rotation detecting device according to any one of claims 1 to 3 , wherein the step portion includes a standing wall portion or a concave portion. 前記段差部は、第１，第２の段差部から構成され、前記第１の段差部は、前記第２の段差部に対して高さが異なるように設けられてなることを特徴とする請求項１に記載の回転検出装置。 The step portion is composed of a first step portion and a second step portion, and the first step portion is provided with a height different from that of the second step portion. Item 2. The rotation detection device according to Item 1. 前記段差部は、第１，第２の立壁部から構成され、前記第１の立壁部は前記中ケースの胴部から第１の方向に延設されるとともに、前記第２の立壁部は、前記胴部から前記第１の方向とは異なる第２の方向へ延設されてなることを特徴とする請求項１に記載の回転検出装置。
The step portion is composed of first and second standing wall portions, the first standing wall portion extends from the body portion of the middle case in a first direction, and the second standing wall portion is The rotation detection device according to claim 1, wherein the rotation detection device extends from the body portion in a second direction different from the first direction.
JP2006354404A 2006-12-28 2006-12-28 Rotation detector Active JP5146901B2 (en)

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JP2020085649A (en) * 2018-11-26 2020-06-04 日本精機株式会社 Mobile body detector and method for manufacturing mobile body detector

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JP6431466B2 (en) 2015-11-16 2018-11-28 日本精機株式会社 Rotation detector
CN110062887B (en) * 2016-12-15 2021-10-15 日本精机株式会社 Moving body detection device

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JP2020085649A (en) * 2018-11-26 2020-06-04 日本精機株式会社 Mobile body detector and method for manufacturing mobile body detector
JP7157906B2 (en) 2018-11-26 2022-10-21 日本精機株式会社 Moving body detection device and method for manufacturing moving body detection device

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