JPH0650253B2 - Sensor structure - Google Patents
Sensor structureInfo
- Publication number
- JPH0650253B2 JPH0650253B2 JP62069771A JP6977187A JPH0650253B2 JP H0650253 B2 JPH0650253 B2 JP H0650253B2 JP 62069771 A JP62069771 A JP 62069771A JP 6977187 A JP6977187 A JP 6977187A JP H0650253 B2 JPH0650253 B2 JP H0650253B2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- case
- sensor
- output line
- terminal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 229920005989 resin Polymers 0.000 claims description 53
- 239000011347 resin Substances 0.000 claims description 53
- 229920005992 thermoplastic resin Polymers 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 7
- 229920001187 thermosetting polymer Polymers 0.000 claims description 7
- 239000004677 Nylon Substances 0.000 claims description 3
- 229920001778 nylon Polymers 0.000 claims description 3
- 239000003822 epoxy resin Substances 0.000 claims description 2
- 229920000647 polyepoxide Polymers 0.000 claims description 2
- 238000000465 moulding Methods 0.000 description 9
- 238000000034 method Methods 0.000 description 7
- 238000001816 cooling Methods 0.000 description 3
- 230000001681 protective effect Effects 0.000 description 3
- 230000001133 acceleration Effects 0.000 description 2
- 239000003365 glass fiber Substances 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000005219 brazing Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 150000003839 salts Chemical class 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Testing Or Calibration Of Command Recording Devices (AREA)
- Transmission And Conversion Of Sensor Element Output (AREA)
- Regulating Braking Force (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ この発明は、外部環境からの密閉性が要求されるセンサ
構造に関するものである。TECHNICAL FIELD The present invention relates to a sensor structure that is required to be hermetically sealed from the external environment.
［従来の技術］ 従来、自動車などに使用されているセンサとしては、回
転センサ、温度センサ、圧力センサ、加速度センサなど
種々のものが知られている。特に、車輪速度検知用の回
転センサなどは、たとえばタイヤハウス内のような外部
環境の過酷な箇所に装着されるため、塩水に対する錆耐
性、耐震性、耐衝撃性、防水性などが要求される。[Prior Art] Conventionally, various sensors such as a rotation sensor, a temperature sensor, a pressure sensor, and an acceleration sensor are known as sensors used in automobiles and the like. In particular, a rotation sensor for wheel speed detection is mounted in a harsh environment such as a tire house in an external environment, so rust resistance against salt water, earthquake resistance, impact resistance, waterproofness, etc. are required. .
第２図は、従来の回転センサの一例を示す断面図であ
る。第２図に示す回転センサ３１において、磁石２、コ
イル３、磁極４およびボビン５からなるセンサ素子部
は、ケース８内に収納されている。コイル３に巻付けら
れた巻線の両端には、端子６が設けられており、該端子
６は、出力線７の先端部と接続されている。ケース８内
には、樹脂がモールドされて樹脂部９が形成されてい
る。ケース８の開口部に位置する出力線７の部分の回り
には、パイプ状の出力線用保護材１０が取付けられてい
る。ケース８の外側には、回転センサ３１を所定の箇所
に固定するためのブラケット１１が取付けられている。FIG. 2 is a sectional view showing an example of a conventional rotation sensor. In the rotation sensor 31 shown in FIG. 2, the sensor element portion including the magnet 2, the coil 3, the magnetic pole 4, and the bobbin 5 is housed in the case 8. Terminals 6 are provided at both ends of the winding wound around the coil 3, and the terminals 6 are connected to the tip ends of the output wires 7. A resin portion 9 is formed by molding resin in the case 8. A pipe-shaped protective member 10 for the output line is attached around the output line 7 located in the opening of the case 8. A bracket 11 for fixing the rotation sensor 31 to a predetermined position is attached to the outside of the case 8.
なお、回転センサの取付法としては、取付用のブラケッ
トを用いる方向の他に、ケースなどへのねじ切りによる
方法やケース側面をボルトで押さえる方法などがある。As a method of mounting the rotation sensor, in addition to the direction in which the mounting bracket is used, there are a method of threading the case, a method of pressing the side surface of the case with a bolt, and the like.
［発明が解決しようとする課題］ 従来の回転センサでは、このようにケース内に樹脂をモ
ールドすることにより、ケース内のセンサ素子部を固定
するとともに、ケース内を密閉して防水気密性を保持し
ている。[Problems to be Solved by the Invention] In the conventional rotation sensor, the sensor element portion in the case is fixed by molding the resin in the case in this way, and the inside of the case is sealed to maintain waterproof airtightness. is doing.
しかしながら、従来の回転センサの防水気密性は必ずし
も十分ではなく、特に過酷な環境下で長期間使用される
自動車用のセンサでは、より防水気密性の向上した信頼
性の高い回転センサが要求されている。また、自動車用
のセンサでは、激しい振動が起きるため、耐衝撃性など
の機械的強度を向上したものも望まれている。However, the waterproof airtightness of the conventional rotation sensor is not always sufficient, and particularly for automobile sensors that are used for a long time in a harsh environment, a highly reliable rotation sensor with improved waterproof airtightness is required. There is. Further, in a sensor for automobiles, violent vibration occurs, so that a sensor having improved mechanical strength such as impact resistance is also desired.
この発明の目的は、かかる従来からの方法を満足すべ
く、防水気密性が改善され、かつ耐震性、耐衝撃性の向
上したセンサ構造を提供することにある。An object of the present invention is to provide a sensor structure having improved waterproof and airtightness and improved earthquake resistance and impact resistance in order to satisfy the conventional method.
［課題を解決するための手段］ この発明のセンサ構造においては、コイルが巻回された
ボビンを有するセンサ素子部と、このセンサ素子部を収
納するケースと、このケースの開口部側から導かれ、セ
ンサ素子部の端子に接続される出力線とを備える。その
ケース内には、センサ素子部および端子の下部を覆うよ
うに、第１の樹脂部が充填されている。ケースの開口部
の端部は外周方向へ鍔状に広がっており、この開口部、
端子の上部および出力線を覆うように、第２の樹脂部が
形成されている。[Means for Solving the Problems] In the sensor structure of the present invention, a sensor element portion having a bobbin around which a coil is wound, a case for accommodating the sensor element portion, and an opening side of the case are provided. , And an output line connected to a terminal of the sensor element unit. The first resin portion is filled in the case so as to cover the sensor element portion and the lower portion of the terminal. The end of the opening of the case spreads in the form of a brim in the outer peripheral direction.
A second resin portion is formed so as to cover the upper portion of the terminal and the output line.
第１の樹脂部の材質としては熱硬化性樹脂が用いられ、
第２の樹脂の材質としては熱可塑性樹脂が用いられてい
る。A thermosetting resin is used as the material of the first resin portion,
A thermoplastic resin is used as the material of the second resin.
［作用］ この発明のセンサ構造では、ケースの開口部の端部が外
周方向に鍔状に広がっており、この部分を熱可塑性樹脂
からなる第２の樹脂部で覆っている。このような構造
は、第２の樹脂部を構成する熱可塑性樹脂を外周方向か
ら高温高圧で成形することによって形成される。したが
って、成形後に第２の樹脂部が冷却する過程で内側に収
縮し、ケースの開口部を外側からさらに締め付けていく
ことになる。これにより、ケースの開口部が第２の樹脂
部と強固に密着し、高い気密性が得られることになる。[Operation] In the sensor structure of the present invention, the end portion of the opening portion of the case spreads in the form of a brim in the outer peripheral direction, and this portion is covered with the second resin portion made of the thermoplastic resin. Such a structure is formed by molding the thermoplastic resin forming the second resin portion from the outer peripheral direction at high temperature and high pressure. Therefore, after the molding, the second resin portion shrinks inward in the process of cooling and further tightens the opening of the case from the outside. As a result, the opening of the case firmly adheres to the second resin portion, and high airtightness can be obtained.
また、第２の樹脂部を高温高圧によって形成する時点に
おいては、センサ素子部および端子の下部が熱硬化性樹
脂からなる第１の樹脂部により覆われ、保護されるの
で、熱や応力に対して断線しやすいコイルを含むセンサ
素子部を損傷させることがない。Further, at the time of forming the second resin portion by high temperature and high pressure, the sensor element portion and the lower portion of the terminal are covered and protected by the first resin portion made of thermosetting resin. The sensor element portion including the coil, which is easily broken, is not damaged.
また、この発明のセンサ構造では、第１の樹脂部が端子
の下部のみを覆うため、第１の樹脂部を充填した後に出
力線を端子の上部に接続することができる。したがっ
て、第１の樹脂部充填の際、端子に出力線を接続した状
態で取り扱う必要がないため、作業性および生産性が著
しく向上する。Further, in the sensor structure of the present invention, since the first resin portion covers only the lower portion of the terminal, it is possible to connect the output line to the upper portion of the terminal after filling the first resin portion. Therefore, when filling the first resin portion, it is not necessary to handle with the output line connected to the terminal, and workability and productivity are significantly improved.
さらに、この発明によれば、第２の樹脂部の材質とし
て、たとえばガラス繊維強化ナイロン樹脂などのような
機械的強度の高い熱可塑性樹脂を使用しているため、出
力線と第２の樹脂部との強い結合力が得られ、センサ構
造の機械的強度を改善することができる。Further, according to the present invention, since the thermoplastic resin having high mechanical strength such as glass fiber reinforced nylon resin is used as the material of the second resin portion, the output line and the second resin portion are A strong binding force with can be obtained and the mechanical strength of the sensor structure can be improved.
［実施例］ 第１図は、この発明の一実施例を示す断面図である。第
１図に示す回転センサ１において、磁石２、コイル３、
磁極４およびボビン５などからなるセンサ素子部が、ケ
ース８内に収納されている。ケース８内は、第１の樹脂
部９ａによってケース８の開口部１２付近まで樹脂によ
りモールドされている。コイル３に巻付けられた細線の
両端は、端子６の下部６ａにはんだ付されており、端子
の下部６ａは第１の樹脂部９ａにより覆われている。[Embodiment] FIG. 1 is a sectional view showing an embodiment of the present invention. In the rotation sensor 1 shown in FIG. 1, the magnet 2, the coil 3,
A sensor element portion including the magnetic pole 4 and the bobbin 5 is housed in the case 8. The inside of the case 8 is molded with resin up to the vicinity of the opening 12 of the case 8 by the first resin portion 9a. Both ends of the thin wire wound around the coil 3 are soldered to the lower portion 6a of the terminal 6, and the lower portion 6a of the terminal is covered with the first resin portion 9a.
またケース８の外側には、回転センサ１を固定するため
のブラケット１１がろう付けで接合されている。出力線
７の先端部１３は、端子６の上部６ｂにかしめ接合され
ている。先端部近傍の出力線７の回りには、パイプ状の
出力線用保護材１０が設けられている。A bracket 11 for fixing the rotation sensor 1 is joined to the outside of the case 8 by brazing. The tip portion 13 of the output wire 7 is caulked and joined to the upper portion 6b of the terminal 6. A pipe-shaped protective member 10 for the output line is provided around the output line 7 near the tip.
ケース８の開口部１２は、その端部が外周方向に鍔状に
広がっており、この部分と端子の上部６ｂとを覆うよう
に、高温高圧で熱可塑性樹脂を成形することにより、第
２の樹脂部９ｂが形成されている。第２の樹脂部９ｂ
は、高温高圧でモールド成形された後に、冷却する過程
で内側に収縮し、ケース８の外側に鍔状に広がった開口
部を外側からさらに締付けていく、これによりケース開
口部１２、出力線用保護材１０およびブラケット１１の
出力線７側の面が、それぞれ第２の樹脂部９ｂと強固に
密着して、高い気密性が得られる。The opening portion 12 of the case 8 has an end portion flaring in a flange shape in the outer peripheral direction, and by molding the thermoplastic resin at high temperature and high pressure so as to cover this portion and the upper portion 6b of the terminal, the second portion is formed. A resin portion 9b is formed. Second resin portion 9b
After being molded at high temperature and high pressure, it shrinks inward in the process of cooling and further tightens the opening that spreads like a brim to the outside of the case 8, thereby tightening the case opening 12 and the output line. The surfaces of the protective material 10 and the bracket 11 on the output line 7 side are firmly adhered to the second resin portion 9b, respectively, and high airtightness is obtained.
この実施例では、第１の樹脂部９ａの材質として、熱可
塑性樹脂であるエポキシ系樹脂を用い、第２の樹脂部９
ｂの材質として、熱可塑性樹脂であるガラス繊維強化ナ
イロン樹脂を用いた。また、出力線用保護材１０の材質
としては、ウレタン系樹脂を用い、金属ケースの材質と
してはステンレスＳＵＳ３０４をそれぞれ用いた。In this embodiment, an epoxy resin, which is a thermoplastic resin, is used as the material of the first resin portion 9a, and the second resin portion 9a is used.
As the material of b, a glass fiber reinforced nylon resin which is a thermoplastic resin was used. Further, urethane resin was used as the material of the output line protection material 10, and stainless steel SUS304 was used as the material of the metal case.
上記のように高温高圧下で熱可塑性樹脂を用いてケース
８の開口部を成形して封止しようとすると、センサ素子
部のコイルに課題な熱や応力がかかる。コイルは一般に
細線を巻回して形成されているので、このような熱や応
力に対して断線しやすい。本発明のセンサ構造では、こ
のように弱いコイル部が、低温低圧工程で形成できる熱
硬化性樹脂で予め覆われて保護されているので、次にそ
の上から高温高圧で成形されても、コイルが損傷するこ
とがない。When the thermoplastic resin is used to mold and seal the opening of the case 8 as described above, the coil of the sensor element is subject to heat and stress. Since the coil is generally formed by winding a fine wire, the coil is easily broken by such heat and stress. In the sensor structure of the present invention, such a weak coil portion is previously covered with and protected by a thermosetting resin that can be formed in a low temperature and low pressure process. Will not be damaged.
なお、実施例においては回転センサを例示して、この発
明のセンサ構造を説明したが、この発明のセンサ構造は
この種類のセンサに限定されることはなく、コイル部を
含むセンサであれば、磁気センサ、温度センサ、圧力セ
ンサ、加速度センサなど、外部環境との密閉性が要求さ
れるセンサに幅広く応用し得るものである。In addition, although the rotation sensor is illustrated in the embodiment and the sensor structure of the present invention has been described, the sensor structure of the present invention is not limited to this type of sensor, as long as it is a sensor including a coil portion, It can be widely applied to sensors such as magnetic sensors, temperature sensors, pressure sensors, and acceleration sensors that are required to be hermetically sealed from the external environment.
［発明の効果］ この発明のセンサ構造では、センサ素子部が熱硬化性樹
脂からなる第１の樹脂部によって覆われ保護されている
ため、第２の樹脂部を成形する際、高温高圧で成形する
ことができる。またケースの開口部の端部が外周方向に
鍔状に広がっており、この部分を熱可塑性樹脂からなる
第２の樹脂部で覆っている。このような構造は、第２の
樹脂部を構成する熱可塑性樹脂を外周方向から高温高圧
で成形することによって形成される。したがって、成形
後に第２の樹脂部が冷却する過程で内側に収縮し、ケー
ス開口部を外側からさらに締付けることになる。その結
果ケースの開口部が第２の樹脂部と強固に密着し、高い
気密性を得ることができる。[Effect of the Invention] In the sensor structure of the present invention, since the sensor element portion is covered and protected by the first resin portion made of a thermosetting resin, the second resin portion is molded at high temperature and high pressure. can do. Further, the end portion of the opening of the case is spread in the outer peripheral direction in a brim shape, and this portion is covered with a second resin portion made of a thermoplastic resin. Such a structure is formed by molding the thermoplastic resin forming the second resin portion from the outer peripheral direction at high temperature and high pressure. Therefore, after the molding, the second resin portion contracts inward in the process of cooling and further tightens the case opening from the outside. As a result, the opening of the case firmly adheres to the second resin portion, and high airtightness can be obtained.
また、この発明のセンサ構造で、出力線を切離した状態
で端子付一体品が得られ、出力線を後付けできるため、
作業性、生産性が著しく向上する。また、第２の樹脂部
成形時、センサ素子や端子下部が、第１の樹脂部でモー
ルド固定され、熱的、機械的に保護されているので、第
２の樹脂部成形時、センサ素子や端子部の劣化、損傷が
ない。Also, with the sensor structure of the present invention, an integrated product with terminals can be obtained with the output line separated, and the output line can be retrofitted,
Workability and productivity are significantly improved. Further, since the sensor element and the lower portion of the terminal are molded and fixed by the first resin portion during the molding of the second resin portion and are thermally and mechanically protected, the sensor element and the lower portion of the terminal are molded during the second resin portion molding. There is no deterioration or damage to the terminals.
さらに、第１の樹脂部が熱硬化性樹脂を充填して形成さ
れ、かつ第２の樹脂部が熱可塑性樹脂によって形成され
ているため、ケース内外の気密性が良好で、しかも機械
的強度の高いセンサ構造が実現する。Further, since the first resin portion is formed by filling the thermosetting resin and the second resin portion is formed of the thermoplastic resin, the airtightness inside and outside the case is good and the mechanical strength is high. A high sensor structure is realized.
第１図は、この発明の一実施例を示す回転センサの断面
図である。 第２図は、従来の回転センサを示す断面図である。 図において、１は回転センサ、２は磁石、３はコイル、
４は磁極、５はボビン、７は出力線、８はケース、９ａ
は第１の樹脂部、９ｂは第２の樹脂部、１２はケースの
開口部、１３は出力線の先端部を示す。FIG. 1 is a sectional view of a rotation sensor showing an embodiment of the present invention. FIG. 2 is a sectional view showing a conventional rotation sensor. In the figure, 1 is a rotation sensor, 2 is a magnet, 3 is a coil,
4 is a magnetic pole, 5 is a bobbin, 7 is an output line, 8 is a case, 9a
Is a first resin portion, 9b is a second resin portion, 12 is a case opening portion, and 13 is a tip portion of the output line.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭56−77141（ＪＰ，Ａ) 実開 昭62−24359（ＪＰ，Ｕ) 実公 昭45−14790（ＪＰ，Ｙ１) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-56-77141 (JP, A) Actually developed 62-24359 (JP, U) Actually published 45-14790 (JP, Y1)
Claims (3)
素子部と、該センサ素子部を収納するケースと、該ケー
スの開口部側から導かれ、センサ素子部の端子に接続さ
れる出力線とを備えるセンサ構造において、 前記センサ素子部および前記端子の下部を覆うように前
記ケース内に充填されて形成された第１の樹脂部と、 前記ケースの開口部の端部は外周方向へ鍔状に広がって
おり、該開口部、前記端子の上部および前記出力線を覆
うように形成された第２の樹脂部とを有し、 前記第１の樹脂部の材質が熱硬化性樹脂であり、前記第
２の樹脂部の材質が熱可塑性樹脂であることを特徴とす
る、センサ構造。1. A sensor element portion having a bobbin around which a coil is wound, a case for accommodating the sensor element portion, and an output line guided from an opening side of the case and connected to a terminal of the sensor element portion. And a first resin portion formed by filling the inside of the case so as to cover a lower portion of the sensor element portion and the terminal, and an end portion of an opening portion of the case is provided with a flange in an outer peripheral direction. A second resin portion formed so as to cover the opening, the upper portion of the terminal and the output line, and the material of the first resin portion is a thermosetting resin. The sensor structure, wherein the material of the second resin portion is a thermoplastic resin.
ことを特徴とする、特許請求の範囲第１項記載のセンサ
構造。2. The sensor structure according to claim 1, wherein the thermosetting resin is an epoxy resin.
ことを特徴とする、特許請求の範囲第１項記載のセンサ
構造。3. The sensor structure according to claim 1, wherein the thermoplastic resin is a nylon resin.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62069771A JPH0650253B2 (en) | 1987-03-24 | 1987-03-24 | Sensor structure |
| US07/166,228 US4847557A (en) | 1987-03-18 | 1988-03-10 | Hermetically sealed magnetic sensor |
| EP88104077A EP0282967B2 (en) | 1987-03-18 | 1988-03-15 | Sensor for detecting variation in magnetic field |
| DE3889752T DE3889752T3 (en) | 1987-03-18 | 1988-03-15 | Sensor for detecting a change in the magnetic field. |
| KR1019880002854A KR910009758B1 (en) | 1987-03-18 | 1988-03-18 | Magnetic field detection sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62069771A JPH0650253B2 (en) | 1987-03-24 | 1987-03-24 | Sensor structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63235811A JPS63235811A (en) | 1988-09-30 |
| JPH0650253B2 true JPH0650253B2 (en) | 1994-06-29 |
Family
ID=13412387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62069771A Expired - Lifetime JPH0650253B2 (en) | 1987-03-18 | 1987-03-24 | Sensor structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0650253B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02106054A (en) * | 1988-10-14 | 1990-04-18 | Sumitomo Electric Ind Ltd | Sensor sealing structure |
| JPH0416364U (en) * | 1990-05-30 | 1992-02-10 | ||
| EP0642026B2 (en) * | 1993-09-01 | 2000-12-13 | Sumitomo Electric Industries, Limited | Method of manufacturing rotation sensor |
| US6693418B2 (en) | 2000-01-07 | 2004-02-17 | Bendix Commercial Vehicle Systems Llc | Magnetic wheel speed sensor having one-piece pole and magnetic flux concentrator |
| KR20040031257A (en) * | 2002-10-04 | 2004-04-13 | 현대자동차주식회사 | improving seal structure of speed sensor assembly for vehicle |
| JP2015052494A (en) * | 2013-09-06 | 2015-03-19 | 日立金属株式会社 | Electronic module with cable |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4514790Y1 (en) * | 1966-04-06 | 1970-06-22 | ||
| JPH059655Y2 (en) * | 1985-07-26 | 1993-03-10 |
-
1987
- 1987-03-24 JP JP62069771A patent/JPH0650253B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63235811A (en) | 1988-09-30 |
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