JPS6250622A - Magnetic encoder - Google Patents
Magnetic encoderInfo
- Publication number
- JPS6250622A JPS6250622A JP18947785A JP18947785A JPS6250622A JP S6250622 A JPS6250622 A JP S6250622A JP 18947785 A JP18947785 A JP 18947785A JP 18947785 A JP18947785 A JP 18947785A JP S6250622 A JPS6250622 A JP S6250622A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- magnetic
- magnetic recording
- support member
- magnetic encoder
- 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.)
- Pending
Links
Landscapes
- Transmission And Conversion Of Sensor Element Output (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、磁気エンコーダの改良に関するものである。[Detailed description of the invention] [Industrial application field] The present invention relates to improvements in magnetic encoders.
磁気エンコーダは、表面に多極着磁したドラム状の磁気
記録回転部を回転軸に取り付け、その表面の着磁パター
ンを、近接して設けた磁気センサで検出して回転状態を
知るものである。A magnetic encoder has a drum-shaped magnetic recording rotating part with multi-pole magnetization on its surface attached to a rotating shaft, and the state of rotation is determined by detecting the magnetization pattern on the surface with a magnetic sensor installed nearby. .
第３図は従来の磁気エンコーダの一例を示す正面図で、
表面に多極着磁された（着磁状態は図示せず）ドラム状
の磁気記録回転部１が回転軸４を介してハウシング５に
回転自在に支承され、支持部材６に装着された磁気抵抗
センサ２が磁気記録回転部１の表面に近接して設けられ
ている。また支持部材６の磁気抵抗センサ２の反対側に
は信号処理回路３が装着され、磁気抵抗センサ２で検出
した信号を処理してリード線８から出力する。なお、９
は全体を覆うカバーである。Figure 3 is a front view showing an example of a conventional magnetic encoder.
A drum-shaped magnetic recording rotating section 1 whose surface is multipole magnetized (the magnetized state is not shown) is rotatably supported by a housing 5 via a rotating shaft 4, and a magnetic resistor mounted on a support member 6. A sensor 2 is provided close to the surface of the magnetic recording rotating section 1 . Further, a signal processing circuit 3 is installed on the opposite side of the support member 6 from the magnetoresistive sensor 2, and processes the signal detected by the magnetoresistive sensor 2 and outputs it from the lead wire 8. In addition, 9
is an all-encompassing cover.
このような構造の従来の磁気エンコーダは、支持部材６
をハウシング５に固着するには一般に複数個のねじ７で
蝶着していた。従って螺着に多くの工数を要していた。A conventional magnetic encoder with such a structure has a support member 6
In order to secure the housing 5 to the housing 5, it is generally hinged with a plurality of screws 7. Therefore, a lot of man-hours were required for screwing.
特に、磁気記録回転部１と磁気センサ２とのギャップ１
ｇは例えば第５図に示すように４０〜１００μｍという
非常に狭い範囲の間に設定する必要があり、この範囲外
では出力電圧が急激に低下して有効な信号を得難いもの
である。In particular, the gap 1 between the magnetic recording rotating section 1 and the magnetic sensor 2
g must be set within a very narrow range of 40 to 100 μm, for example, as shown in FIG. 5; outside this range, the output voltage will drop rapidly and it will be difficult to obtain an effective signal.
従ってねじ７により支持部材６を上記設定範囲内の寸法
精度（！！！直、平行度等）でハウシング５に固着する
ことは、相当の熟練と多大の工数とを要し極めて困難な
作業であった。Therefore, fixing the support member 6 to the housing 5 with the screws 7 with dimensional accuracy (!!!straightness, parallelism, etc.) within the above setting range is an extremely difficult task that requires considerable skill and a large number of man-hours. there were.
このため、ギャップ１８の精度を容易に５１整すること
ができるようにしたものに、例えば特開昭６０−８６４
１４号公報で開示された磁気エンコーダがある。For this reason, for example, Japanese Patent Laid-Open No. 60-864
There is a magnetic encoder disclosed in Japanese Patent No. 14.
これは、第４図に示すように、支持部材６をねじ７によ
り、回転軸４を遊嵌する基板１０に固着し、この基板１
０を取り付けねじ （図示せず）によってハツシング５
に固着した後、調節ねじ１１によって基板１０の傾きを
調節して、ギャップ１ｇの精度を微調整できるようにし
たものである。As shown in FIG.
Hashing 0 with mounting screws (not shown) 5
After the substrate 10 is fixed, the inclination of the substrate 10 is adjusted using an adjustment screw 11, so that the accuracy of the gap 1g can be finely adjusted.
しかしながら、支持部材６を基板１０に固着するにはね
じ７で螺着する等の手段によらねばならず、また、後で
ギャップらの精度の微調整がでかるとはいえ固着時シこ
も相当の精度を出しておく必要があり、また部品点数も
多いので前記従来のものとあまり変わらぬくらいの熟練
度と組立工数を要するものである。However, in order to fix the support member 6 to the substrate 10, it is necessary to use a means such as screwing the support member 6 with the screw 7, and even though the accuracy of the gap etc. can be finely adjusted later, there is a considerable amount of damage when fixing the support member 6. It is necessary to achieve high accuracy, and since there are a large number of parts, it requires the same level of skill and assembly man-hours as the conventional method.
また、信号処理回路３を支持部材６の磁気抵抗センサ２
の反対側に装着しているので、形状が大型になるという
欠点も有する。Further, the signal processing circuit 3 is connected to the magnetoresistive sensor 2 of the support member 6.
Since it is attached to the opposite side, it also has the disadvantage of being large in size.
本発明は、ギャップの精度が設定範囲内になるように、
特に熟練を要せずに少ない工数で容易に組み立てること
ができ、しかも部品点数が少なく形状も小型な磁気エン
コーダを提供しようとするものである。In the present invention, so that the accuracy of the gap is within a set range,
The object of the present invention is to provide a magnetic encoder that can be easily assembled with a small number of man-hours without requiring any particular skill, has a small number of parts, and is compact in size.
本発明の磁気エンコーダは上記目的達成のため、信号処
理回路を、外周に多極着磁したドラム状の磁気記録回転
部の回転軸とほぼ直交してハウシングに取り付けられた
基板上に形成せしめるとともに、この基板の一部を折曲
して磁気記録検出部の支持部材を形成し、この支持部材
に磁気抵抗センサを保持せしめたものである。In order to achieve the above object, the magnetic encoder of the present invention has a signal processing circuit formed on a substrate attached to a housing so as to be substantially orthogonal to the rotation axis of a drum-shaped magnetic recording rotating section with multi-pole magnetization on the outer periphery. A part of this substrate is bent to form a support member for a magnetic recording detection section, and a magnetoresistive sensor is held on this support member.
信号処理回路を基板上に設けたことにより、前記従来の
もののように支持部材の磁気抵抗センサの反対側に装着
しないので、半径方向への出っ張りがなくなり、従来の
ものに比して小型化することができる。By providing the signal processing circuit on the board, it is not mounted on the opposite side of the support member to the magnetoresistive sensor as in the conventional type, so there is no protrusion in the radial direction, making it smaller than the conventional type. be able to.
また、磁気記録検出部を、信号処理回路を設けた基板の
一部を折曲して一体に設けたので、支持部材を別途ねじ
等によりハウシングや基板に取り付ける必要がない。従
って、取り付は工数を着しく節減することができるとと
もに、寸法精度を容易に設定範囲内に入れることができ
るのである。Further, since the magnetic recording detection section is integrally provided by bending a part of the substrate on which the signal processing circuit is provided, there is no need to separately attach a supporting member to the housing or the substrate with screws or the like. Therefore, the number of man-hours required for installation can be significantly reduced, and the dimensional accuracy can be easily kept within the set range.
特に、基板の一部をプレス等により折り曲げて支持部材
を形成すると製作が容易である。In particular, manufacturing is easy if the supporting member is formed by bending a part of the substrate using a press or the like.
さらに、基板をアルミニツム、鉄などの金属板とし、そ
の表面に例えば１００μ他程度のホーローを被着した絶
縁皮膜を形成すると、例えば有機材をベースとしたプリ
ント基板に比してさらに十分な機械的強度が得られ、振
動や衝撃による磁気抵抗センサの移動、すなわちギャッ
プの変動を極力小さくすることができ、常に良好かつ十
分な検出信号が得られる。Furthermore, if the substrate is a metal plate such as aluminum or iron, and an insulating film coated with enamel of about 100 μm or more is formed on the surface, the mechanical strength will be more sufficient than that of a printed circuit board based on an organic material. Strength is obtained, movement of the magnetoresistive sensor due to vibrations and shocks, that is, variation in the gap, can be minimized, and a good and sufficient detection signal can always be obtained.
また、基板を金属板にすると外米ノイズを遮断する磁気
シールドの効果を発揮することができる。このことは、
本発明磁気エンコーダを漏洩磁界の発生する個所、すな
わち、モータのハウシングあるいはエンドブラケットに
設置する際、極めて有効である。Furthermore, if the substrate is made of a metal plate, it can provide a magnetic shielding effect that blocks foreign noise. This means that
The magnetic encoder of the present invention is extremely effective when installed at a location where leakage magnetic fields occur, ie, a motor housing or an end bracket.
第１図は本発明の一実施例を示す正面図、第２図は要部
の斜視図である。FIG. 1 is a front view showing an embodiment of the present invention, and FIG. 2 is a perspective view of the main parts.
第１図において、１は表面に多極着磁が施されたドラム
状の磁気記録回転部で、回転軸４を介してハウシング５
に回転自在に支承されている。１２は磁気センサ２を支
持部材６に装着してなる磁気記録検出部で、第２図にも
示すように磁気記録回転部１の回転軸４とほぼ直交して
ハウシング５に取り付けられた円形の基板１０上の外周
部に設けられている。In FIG. 1, reference numeral 1 denotes a drum-shaped magnetic recording rotating section whose surface is multi-pole magnetized.
It is rotatably supported. Reference numeral 12 denotes a magnetic recording detecting section in which the magnetic sensor 2 is attached to a support member 6, and as shown in FIG. It is provided on the outer periphery of the substrate 10.
しかして、本実施例においては、基板１０は厚さ１
ｍｍ程度の鉄板をプレスにより支持部材６を含めた形状
に打ち抜き、その後支持部材６の部分を９０°に曲げ成
形した後（この間に中央穴１０＆、取付穴１０ｂも打ち
抜り）、各穴１０ａ、１０ｂ内も含めてホーローによる
絶縁皮膜を形成したものである。そして、この基板１０
上にＩＣ３ａ、抵抗３ｂ等よりなる信号処理回路３を形
成し、出力のためのり−）’＃１８を設けている。Therefore, in this embodiment, the substrate 10 has a thickness of 1
After punching out a steel plate with a diameter of about mm into a shape including the support member 6, and then bending the support member 6 at 90 degrees (during this process, also punch out the center hole 10& and the mounting hole 10b), each hole 10a is punched out. , an insulating film made of enamel is formed, including the inside of 10b. And this board 10
A signal processing circuit 3 consisting of an IC 3a, a resistor 3b, etc. is formed on the top, and a glue 18 for output is provided.
この上う；こ、基板１０上に信号処理回路３と磁気記録
検出部とを一体的に設けたので、イヤクプ１ｇが設定範
囲になるように精度よく容易に組み立てることができる
のである。Furthermore, since the signal processing circuit 3 and the magnetic recording detecting section are integrally provided on the substrate 10, it is possible to assemble the earcup 1g easily and accurately so that it falls within the set range.
なおギャップ１ｇの精度は、必要により調節ねじ１１を
用いて基、ｔ１０の傾きを調節することによって容易に
ｙ４整することがでさるものである。The accuracy of the gap 1g can be easily adjusted to y4 by adjusting the inclination of t10 using the adjusting screw 11 if necessary.
本発明の磁気エンコーダは、上述のように構成したこと
により、部品点数が少なく、従って特別な熟練を要せず
に少ない工数で高精度、高能率に製作することができ、
しかも小型で使い勝手のよいものを安値に提供で評うる
ものである。Since the magnetic encoder of the present invention is configured as described above, the number of parts is small, and therefore, it can be manufactured with high accuracy and high efficiency with a small number of man-hours without requiring special skill.
Moreover, it is praised for offering small, easy-to-use products at low prices.
また基板を金属板にすると、この金属板が雑音磁界（例
えばモータのロータあるいはエンドコイルからの漏洩磁
束）の発生源と信号処理回路および磁気抵抗−Ｃンサの
間に介在することになるので、磁気シールド効果を発揮
して良好な信号を取り出し磁気エンコーダとしての性能
を向上し得るものである。Furthermore, if the board is made of a metal plate, this metal plate will be interposed between the source of the noise magnetic field (for example, leakage magnetic flux from the motor rotor or end coil), the signal processing circuit, and the magnetoresistive sensor. It exhibits a magnetic shielding effect, extracts good signals, and improves performance as a magnetic encoder.
第１図は本発明の一実施例を示す正面図、第２図は本発
明の要部斜視図、第３図、第４図は従来の磁気エンコー
ダをそれぞれ示す正面図、第Ｓ図はギャップと出力電圧
との関係を示す図である。
１ ：磁気記録回転部、 ２ ： 磁気センサ、３
：信号処理回路、 ４ ：回転輪、５ ：ハウシング、
６ ：支持部材、 １０ ：基板、１２：磁気記録検
出部
代理人 弁理士 本 闇 崇第 ／ 図
第 ２ 図
Ａ富号処理回発FIG. 1 is a front view showing an embodiment of the present invention, FIG. 2 is a perspective view of essential parts of the present invention, FIGS. 3 and 4 are front views showing a conventional magnetic encoder, and FIG. S is a gap FIG. 3 is a diagram showing the relationship between and output voltage. 1: Magnetic recording rotating section, 2: Magnetic sensor, 3
: Signal processing circuit, 4 : Rotating wheel, 5 : Housing,
6: Support member, 10: Substrate, 12: Magnetic recording detection unit agent Patent attorney Takashi Motoyami / Figure 2 Figure A No. Processing issue
Claims (3)
部と、支持部材を介して磁気抵抗 センサを前記磁気記録回転部の外周面に近 接して対向する位置に保持する磁気記録検 出部と、信号処理回路とを備えた磁気エン コーダにおいて、前記信号処理回路を、前 記磁気記録回転部の回転軸とほぼ直交して ハウシングに取り付けられた基板上に形成 せしめるとともに、該基板の一部を折曲し て前記磁気記録検出部の支持部材を形成し、該支持部材
に前記磁気抵抗センサを保持せ しめたことを特徴とする磁気エンコーダ。(1) a magnetic recording rotating section that is rotatably supported by a housing; a magnetic recording detecting section that holds a magnetoresistive sensor in a position close to and facing the outer peripheral surface of the magnetic recording rotating section via a support member; In the magnetic encoder equipped with a signal processing circuit, the signal processing circuit is formed on a substrate attached to a housing substantially perpendicular to the rotation axis of the magnetic recording rotating section, and a part of the substrate is bent. A magnetic encoder characterized in that a supporting member of the magnetic recording detecting section is formed by forming a support member of the magnetic recording detecting section, and the magnetoresistive sensor is held by the supporting member.
その表面に絶縁皮膜を形成せしめ たことを特徴とする特許請求の範囲第１項 記載の磁気エンコーダ。(2) The substrate is a metal plate such as aluminum or iron,
The magnetic encoder according to claim 1, characterized in that an insulating film is formed on the surface of the magnetic encoder.
を特徴とする特許請求の範囲第１ 項または第２項記載の磁気エンコーダ。(3) The magnetic encoder according to claim 1 or 2, characterized in that a metal substrate is located between the noise source and the recording medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18947785A JPS6250622A (en) | 1985-08-30 | 1985-08-30 | Magnetic encoder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP18947785A JPS6250622A (en) | 1985-08-30 | 1985-08-30 | Magnetic encoder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6250622A true JPS6250622A (en) | 1987-03-05 |
Family
ID=16241913
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP18947785A Pending JPS6250622A (en) | 1985-08-30 | 1985-08-30 | Magnetic encoder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6250622A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0618518U (en) * | 1991-08-09 | 1994-03-11 | 範保 深井 | Veneer plywood both ends, cedar Muku material processed extra thick floating finish, pasted ceiling board |
| JPH0625415U (en) * | 1992-09-02 | 1994-04-08 | 松吾 上村 | Makeup ceiling board |
-
1985
- 1985-08-30 JP JP18947785A patent/JPS6250622A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0618518U (en) * | 1991-08-09 | 1994-03-11 | 範保 深井 | Veneer plywood both ends, cedar Muku material processed extra thick floating finish, pasted ceiling board |
| JPH0625415U (en) * | 1992-09-02 | 1994-04-08 | 松吾 上村 | Makeup ceiling board |
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