JPH04188077A - Electromagnetic induction type rotation detector - Google Patents
Electromagnetic induction type rotation detectorInfo
- Publication number
- JPH04188077A JPH04188077A JP31876290A JP31876290A JPH04188077A JP H04188077 A JPH04188077 A JP H04188077A JP 31876290 A JP31876290 A JP 31876290A JP 31876290 A JP31876290 A JP 31876290A JP H04188077 A JPH04188077 A JP H04188077A
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- winding
- coil
- magnetic material
- electromagnetic induction
- 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.)
- Granted
Links
- 230000005674 electromagnetic induction Effects 0.000 title claims description 16
- 238000004804 winding Methods 0.000 claims abstract description 35
- 239000000696 magnetic material Substances 0.000 claims description 19
- 238000000034 method Methods 0.000 abstract 1
- 230000004907 flux Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 229920003002 synthetic resin Polymers 0.000 description 2
- 239000000057 synthetic resin Substances 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- -1 for example Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
- 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〕
本発明は電磁誘導方式の回転検出器に関し、特に磁性体
にコイルを巻装して成り、回転体の回転面に磁性体の軸
方向先端面が対向するように配置する電磁誘導式回転検
出器に係る。[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to an electromagnetic induction type rotation detector, and in particular, the present invention relates to an electromagnetic induction type rotation detector, in particular, which is made by winding a coil around a magnetic material, and has an axial tip of the magnetic material on the rotating surface of the rotating body. This relates to an electromagnetic induction rotation detector arranged so that the surfaces thereof face each other.
電磁誘導方式の回転検出器として、例えば実開昭５６−
１０５８４７号公報に開示されているように、磁性体に
コイルを巻装した回転検出器か知られている。同公報に
おいては、磁性体に対向する回転体との関係に鑑み磁性
体の全長に亘り磁束密度を最適なものとすべく、磁性体
の形状を円錐台状に形成することか提案されている。即
ち、円錐台状の磁性体と、これを収容する筒体のボビン
を有し、このボビン回りにコイルの巻線を巻回すること
としている。As an electromagnetic induction type rotation detector, for example,
As disclosed in Japanese Patent No. 105847, a rotation detector in which a coil is wound around a magnetic material is known. In this publication, in order to optimize the magnetic flux density over the entire length of the magnetic body in view of the relationship with the rotating body facing the magnetic body, it is proposed that the shape of the magnetic body be formed into a truncated cone shape. . That is, it has a truncated cone-shaped magnetic material and a cylindrical bobbin that accommodates the magnetic material, and the coil winding is wound around this bobbin.
上記従来技術においては、回転体と磁性体との関係に鑑
み磁性体の形状に改良が加えられたものであるが、コイ
ル等の具体的構造は明確にされていない。上記従来技術
に従い磁性体を円錐台状に形成するとすれば、これを収
容するボビンの軸部も磁性体の形状に沿った形状としテ
ーパ面を有する軸部とすることが望ましい。ボビンの軸
部の外面を円柱面とする場合には、磁性体の大径端を基
準に軸部が形成され小径端回りの軸部の肉厚か大となる
ので、それだけコイルの巻線の巻回数か減少することと
なる。従って、テーパ面を有する軸部を備えたボビンを
用い、これにコイルの巻線を巻回することが必要となる
が、巻き始め時に巻線がテーパ面を滑るため巻回作業が
困難であり、従来に比し作業性が著しく低下する。In the above conventional technology, the shape of the magnetic body has been improved in view of the relationship between the rotating body and the magnetic body, but the specific structure of the coil and the like has not been clarified. If the magnetic body is formed into a truncated cone shape according to the above-mentioned prior art, it is desirable that the shaft portion of the bobbin that accommodates the magnetic body also has a shape that follows the shape of the magnetic body and has a tapered surface. When the outer surface of the shaft of the bobbin is a cylindrical surface, the shaft is formed based on the large diameter end of the magnetic material, and the thickness of the shaft around the small diameter end becomes thicker. The number of turns will decrease. Therefore, it is necessary to use a bobbin with a shaft portion having a tapered surface and wind the coil winding around this bobbin, but the winding work is difficult because the winding slips on the tapered surface at the beginning of winding. , workability is significantly lower than before.
そこで、本発明はテーパ部を有する磁性体にコイルを巻
装する電磁誘導式回転検出器に関し、前記磁性体を収容
するボビンの軸部をテーパ形状とすると共に、コイルの
巻線をボビンの軸部に容易に巻回し得るようにすること
を目的とする。Therefore, the present invention relates to an electromagnetic induction rotation detector in which a coil is wound around a magnetic material having a tapered portion, in which the shaft portion of a bobbin that accommodates the magnetic material is made into a tapered shape, and the winding of the coil is wound around the shaft of the bobbin. The purpose is to make it easy to wind around the body.
上述の目的を達成するため、本発明は先端から基端に向
けて軸方向に断面積が漸増するテーパ部を有する磁性体
にコイルを巻装し、回転体の回転面に前記磁性体の軸方
向先端面が対向するように配置する電磁誘導式回転検出
器において、前記磁性体のテーパ部に対応したテーパ面
を有する軸部に前記コイルを構成する巻線を巻回すると
共に、少くとも前記磁性体の一部を中空部内に収容する
筒体のボビンと、該ボビンと接合すると共に前記コイル
の巻線に電気的に接続するターミナルを内蔵するコネク
タとを備え、前記ボビンに前記軸部の小径端から大径端
に至る溝を形成し、該溝を介して前記巻線を案内するよ
うにしたものである。In order to achieve the above-mentioned object, the present invention winds a coil around a magnetic body having a tapered part whose cross-sectional area gradually increases in the axial direction from the distal end to the base end, and the axis of the magnetic body is wound around the rotating surface of the rotary body. In an electromagnetic induction rotation detector arranged such that the directional tip surfaces face each other, a winding constituting the coil is wound around a shaft portion having a tapered surface corresponding to the tapered portion of the magnetic material, and at least A cylindrical bobbin that accommodates a part of the magnetic material in a hollow part, and a connector that is joined to the bobbin and has a built-in terminal that is electrically connected to the winding of the coil, A groove is formed from a small diameter end to a large diameter end, and the winding wire is guided through the groove.
尚、上記磁性体は先端部を回転体に対向して配置するコ
アと、該コアの基端部に接合する永久磁石によって構成
し、前記コアを、先端部から前記永久磁石との接合部方
向に断面積か漸増するテーパ部を備えたものとするとよ
い。The above-mentioned magnetic body is composed of a core whose distal end is disposed facing the rotary body, and a permanent magnet joined to the proximal end of the core, and the core is arranged in the direction from the distal end to the joint with the permanent magnet. It is preferable to have a tapered portion whose cross-sectional area gradually increases.
上記のように構成された電磁誘導式回転検出器において
は、テーパ部を有する磁性体に対応してボビンの軸部に
テーパ面が形成されているが、この軸部に小径端から大
径端に至る溝か形成されている。このため、コイルの巻
線をボビンに巻回するに当り、巻き始め時に巻線は上記
溝に案内されるので、滑りが生ずることなく容易にボビ
ン軸部に巻回することができる。In the electromagnetic induction rotation detector configured as described above, a tapered surface is formed on the shaft portion of the bobbin corresponding to the magnetic material having a tapered portion. A groove is formed that leads to. Therefore, when winding the coil around the bobbin, the winding is guided by the groove at the beginning of winding, so that it can be easily wound around the bobbin shaft without slipping.
而して、例えば上記磁性体を永久磁石で構成した場合、
永久磁石の一方の磁極からの磁束かコイルを介して永久
磁石の他方の磁極に戻る磁気回路が形成される。そして
、この磁性体に対向して配設される回転体が回転すると
、例えば回転体の外周に形成された歯部の存在により磁
性体との間に形成されるエアギャップが変化する。これ
により、コイルに対する鎖交磁束が回転体の回転に応じ
て変化することになり、電磁誘導作用によりコイルに起
電力が誘起されパルス信号が出力される。For example, if the magnetic body is made of a permanent magnet,
A magnetic circuit is formed in which the magnetic flux from one pole of the permanent magnet returns to the other pole of the permanent magnet via the coil. Then, when the rotating body disposed opposite to the magnetic body rotates, the air gap formed between the rotating body and the magnetic body changes due to the presence of teeth formed on the outer periphery of the rotating body, for example. As a result, the flux linkage to the coil changes according to the rotation of the rotating body, and an electromotive force is induced in the coil by electromagnetic induction, and a pulse signal is output.
以下、本発明の電磁誘導式回転検出器の望ましい実施例
を図面を参照して説明する。Hereinafter, preferred embodiments of the electromagnetic induction type rotation detector of the present invention will be described with reference to the drawings.
第１図乃至第６図は本発明の電磁誘導式回転検出器の一
実施例を示すもので、内燃機関のクランク角度検出装置
に供される。即ち、第１図に二点鎖線で示すように回転
面に歯部２１が形成され図示しない内燃機関に同期して
回転する磁性材料の回転体２０に対向するように、電磁
誘導式回転検出器たる電磁ピックアップｌが配置される
。1 to 6 show an embodiment of the electromagnetic induction rotation detector of the present invention, which is used in a crank angle detection device for an internal combustion engine. That is, as shown by the two-dot chain line in FIG. 1, the electromagnetic induction rotation detector is arranged so as to face a rotating body 20 made of magnetic material that has teeth 21 formed on its rotating surface and rotates in synchronization with an internal combustion engine (not shown). A barrel electromagnetic pickup l is arranged.
電磁ピックアップ１は、コア２と、その基端部に接合し
た略円柱状の永久磁石３と、これらコア２及び永久磁石
３を収容すると共に、コア２を収容した軸部回りにコイ
ル４を巻回したボビン５を備えている。コア２は磁性材
料により略円錐台状に形成されたテーパ部２ｂと、その
小径端に連続して形成された円柱状の先端部２ａから成
る。The electromagnetic pickup 1 includes a core 2, a substantially cylindrical permanent magnet 3 joined to the base end thereof, and a coil 4 wound around the shaft portion housing the core 2 and the permanent magnet 3. It is equipped with a spun bobbin 5. The core 2 consists of a tapered part 2b formed of a magnetic material into a substantially truncated conical shape, and a cylindrical tip part 2a formed continuously at the small diameter end of the tapered part 2b.
尚、このコア２は複数の珪素鋼板の積層体で形成するこ
ととしてもよい。Note that this core 2 may be formed of a laminate of a plurality of silicon steel plates.
ボビン５は小径の筒体部５ａ、テーパ面が形成されたテ
ーパ部５ｂ及び大径の筒体部５Ｃから成る合成樹脂製の
筒体で、小径円形断面の中空部、テーパ状の中空部及び
大径円形断面の中空部が連続して形成され、これらの中
空部に夫々コア２及び永久磁石３が収容されている。ボ
ビン５の大径の筒体部５Ｃの外面には、第２図に示すよ
うに軸方向に一対の保合突起５ｆ、５ｇが形成されてい
る。また、筒体部５ａの先端部とテーパ部５ｂの大径端
部には鍔部５ｄ、５ｅが夫々一体的に形成されており、
後述するようにこれらの鍔部５ｄ。The bobbin 5 is a synthetic resin cylinder consisting of a small diameter cylinder part 5a, a tapered part 5b with a tapered surface, and a large diameter cylinder part 5C. Hollow portions with a large diameter and circular cross section are formed continuously, and the core 2 and the permanent magnet 3 are accommodated in these hollow portions, respectively. As shown in FIG. 2, a pair of locking protrusions 5f and 5g are formed on the outer surface of the large-diameter cylindrical portion 5C of the bobbin 5 in the axial direction. Further, collar portions 5d and 5e are integrally formed at the tip of the cylindrical portion 5a and the large diameter end of the tapered portion 5b, respectively.
These flange portions 5d as described later.
５ｅ間にコイル４の巻線が巻回される。The winding of the coil 4 is wound between the coils 5e and 5e.
コネクタ６は、一対のターミナル（図では一方のみを７
で示す）がインサート樹脂成形され、第１図及び第２図
に示す形状に成形されている。即ち、有底筒体形状の筒
体部６ａと接合部６ｂを有し、各々の軸が略直交するよ
うに形成されており、ターミナル７の一端が延出部７ａ
として筒体部６ａから延出し、他端が接続端子７ｂとし
て接合部６ｂの凹部に延出している。筒体部６ａの底部
近傍の外周には接合部６ｂの一側壁と共に環状段部を構
成する段部６Ｃが一体的に形成されている。また、筒体
部６ａの開口端から軸方向に延出する一対の矩形の延出
部６ｄ、６ｅが一体的に形成されており、これらに夫々
第３図に示すような矩形の保合孔６ｆ、６ｇが穿設され
ている。これらの保合孔６ｆ、６ｇに上記ボビン５の保
合突起５ｆ、５ｇが係合しボビン５とコネクタ６が接合
されるように構成されており、所謂スナツプフィツト構
造となっている。更に、筒体部６ａの外周に環状溝６ｈ
が形成されており、これにＯリングｌＯが嵌着されてい
る。而して、筒体部６ａとボビン５の中空部内にコア２
及び永久磁石３が収容されるが、永久磁石３の端面と筒
体部６ａの底面との間にスプリングワッシャ１１が介装
されており、コア２及び永久磁石３がテーパ部５ｂ方向
に押圧されている。The connector 6 has a pair of terminals (only one terminal is connected to 7 in the figure).
) is molded with insert resin to have the shape shown in FIGS. 1 and 2. That is, it has a cylindrical body part 6a in the shape of a cylinder with a bottom and a joint part 6b, and is formed so that the axes thereof are substantially perpendicular to each other, and one end of the terminal 7 is connected to the extending part 7a.
The other end extends from the cylindrical body portion 6a as a connecting terminal 7b into the recessed portion of the joint portion 6b. A step portion 6C, which forms an annular step portion together with one side wall of the joint portion 6b, is integrally formed on the outer periphery of the cylindrical body portion 6a near the bottom. Furthermore, a pair of rectangular extensions 6d and 6e extending in the axial direction from the open end of the cylindrical body part 6a are integrally formed, and each of these has a rectangular retaining hole as shown in FIG. 6f and 6g are drilled. The locking protrusions 5f and 5g of the bobbin 5 are engaged with the locking holes 6f and 6g to connect the bobbin 5 and the connector 6, forming a so-called snap-fit structure. Furthermore, an annular groove 6h is formed on the outer periphery of the cylindrical body portion 6a.
is formed, and an O-ring lO is fitted onto this. Thus, the core 2 is inserted into the hollow part of the cylindrical body part 6a and the bobbin 5.
A spring washer 11 is interposed between the end surface of the permanent magnet 3 and the bottom surface of the cylindrical portion 6a, so that the core 2 and the permanent magnet 3 are pressed toward the tapered portion 5b. ing.
第１図及び第３図に示すように、ボビン５の筒体部５ｃ
には一対のターミナル（図では一方のみを１７で示す）
が固着されており、各々の接続部１７ａにコイル４０巻
線の端部が巻回され半田接合される。一対のターミナル
１７の各々は、ボビン５と筒体部６ａが上述のように接
合された後、ターミナル７の延出部７ａと重合しプロジ
ェクション溶接によって接合される。このように接合さ
れた後、第２図に示すように絶縁テープ１５（第１図及
び第３図では図示省略）が巻回され、同様にコイル４の
外周に絶縁テープ１４が巻回される。As shown in FIGS. 1 and 3, the cylindrical body portion 5c of the bobbin 5
has a pair of terminals (only one is shown as 17 in the diagram)
are fixed, and the ends of the coil 40 windings are wound and soldered around each connection portion 17a. After the bobbin 5 and the cylindrical body portion 6a are joined as described above, each of the pair of terminals 17 overlaps with the extension portion 7a of the terminal 7 and is joined by projection welding. After being joined in this way, an insulating tape 15 (not shown in FIGS. 1 and 3) is wound as shown in FIG. 2, and an insulating tape 14 is similarly wound around the outer periphery of the coil 4. .
第４図は電磁ピックアップｌの一部の側面図を示すもの
で、第２図の電磁ピックアップｌからケース８、コイル
４及び絶縁テープ１４を除去し、ボビン５に装着したタ
ーミナル１７の接続部１７ａを立設した状態を示してい
る。同図に明らかなようにボビン５のテーパ部５ｂには
その小径端から大径端に至る凹状の溝５ｈが形成されて
いる。FIG. 4 shows a side view of a part of the electromagnetic pickup l, in which the case 8, coil 4 and insulating tape 14 are removed from the electromagnetic pickup l shown in FIG. It shows the state in which it is erected. As is clear from the figure, a concave groove 5h extending from the small diameter end to the large diameter end is formed in the tapered portion 5b of the bobbin 5.
テーパ部５ｂの大径端に設けられる鍔部５ｅは、溝５ｈ
の先端近傍で切欠かれている。更に、溝５ｈの延長上の
筒体部５ｃの外面には係止突起５１が設けられている。The flange portion 5e provided at the large diameter end of the tapered portion 5b has a groove 5h.
It is notched near the tip. Furthermore, a locking protrusion 51 is provided on the outer surface of the cylindrical body portion 5c on the extension of the groove 5h.
筒体部５ｃには前述のようにターミナル１７が固着され
ており、舌片状の接続部１７ａが立設されている（第５
図の二点鎖線参照）。The terminal 17 is fixed to the cylindrical body part 5c as described above, and the tongue-like connecting part 17a is provided upright (the fifth
(See the two-dot chain line in the figure).
而して、コイル４の巻線がボビン５に巻回されるときに
は、先ず第５図の二点鎖線で示すように接続部１７ａの
先端に巻線が反時計方向に巻き付けられ、接続部１７ａ
の基端部で再度反時計方向に巻き付けられた後、係止突
起５１を経由しく第４図の係止突起５１の左側から）溝
５ｈを介して巻線が筒体部５ａに案内される。そして、
鍔部５ｄ、５ｅ間の筒体部５ａ及びテーパ部５ｂ上に順
次巻回される。巻線が巻回されると第４図の裏面側の鍔
部５ｅの切欠き（図示せず）を介して巻線が導出され、
ターミナル１７と同様の裏面側のターミナル（第５図の
右側のターミナル）に巻付けられる。このようにして巻
き付けられた巻線は、ターミナル１７の接続部１７ａ先
端の巻付部のみに半田付けが行われた後、接続部１７ａ
が屈曲され第５図に矢印で示すようにボビン５の軸と平
行になる。このとき、コイル４の巻線は係止突起５１を
経由しているので第６図に示すように接続部１７ａの下
方に位置することはなく、従って巻線が接続部１７ａに
押しつぶされるおそれはない。When the winding of the coil 4 is wound around the bobbin 5, the winding is first wound counterclockwise around the tip of the connecting portion 17a as shown by the two-dot chain line in FIG.
After being wound counterclockwise again at the base end of the winding, the winding is guided to the cylindrical body portion 5a via the locking protrusion 51 (from the left side of the locking protrusion 51 in FIG. 4) via the groove 5h. . and,
It is sequentially wound onto the cylindrical body part 5a and the tapered part 5b between the collar parts 5d and 5e. When the winding is wound, the winding is led out through a notch (not shown) in the flange 5e on the back side of FIG.
It is wound around a terminal on the back side similar to terminal 17 (the terminal on the right side in FIG. 5). The winding wound in this way is soldered only to the winding portion at the tip of the connection portion 17a of the terminal 17, and then
is bent and becomes parallel to the axis of the bobbin 5 as shown by the arrow in FIG. At this time, since the winding of the coil 4 passes through the locking protrusion 51, it will not be located below the connection part 17a as shown in FIG. 6, so there is no risk that the winding will be crushed by the connection part 17a. do not have.
上記のように組み付けられたボビン５及び筒体部６ａを
囲繞するように第１図乃至第３図に示すケース８が設け
られ、その底面にコア２の先端部２ａの端面が当接して
いる。このケース８は金属製例えばステンレス製の有底
円筒体で、筒体部６ａの環状溝６ｈと段部６Ｃとの間の
外面に圧入される。また、ケース８の開口端部８ａは外
方に拡開した形状とされており、先端の平面部が段部６
Ｃに当接し、これに密着している。そして、段部６ｃ、
ケース８の開口端部８ａを囲繞するように、合成樹脂
の一体成形によりフランジ９が形成される。尚、フラン
ジ９には第１図に示すように一対の金属製のカラー１２
かインサート成形される。A case 8 shown in FIGS. 1 to 3 is provided to surround the bobbin 5 and cylindrical body 6a assembled as described above, and the end surface of the tip 2a of the core 2 is in contact with the bottom surface of the case 8 shown in FIGS. . This case 8 is a bottomed cylindrical body made of metal, for example, stainless steel, and is press-fitted into the outer surface of the cylindrical body portion 6a between the annular groove 6h and the step portion 6C. Further, the open end 8a of the case 8 has a shape that expands outward, and the flat part at the tip is the stepped part 6.
It comes into contact with C and is in close contact with it. And the stepped portion 6c,
A flange 9 is formed by integral molding of synthetic resin so as to surround the open end 8a of the case 8. The flange 9 is provided with a pair of metal collars 12 as shown in FIG.
or insert molded.
上記のように構成された電磁ピックアップｌの作動を説
明すると、第１図においてコア２には永久磁石３によっ
て所定の磁束分布が形成され、先端部２ａの断面積は永
久磁石３の断面積に比し小となっているので先端部２ａ
からの漏洩磁束か抑えられ、最適磁束密度となっている
。そして、回転体２０が回転すると、その歯部２１かコ
ア２の先端面に対向する毎に磁束分布か変化する。これ
により、コイル４と鎖交する磁束量が変化し、また回転
体２０の歯部２１に近接するときと離隔するときとで出
力か逆方向になるため、電磁誘導作用によりコイル４に
回転体２０の回転に応した交流電圧か誘起され、回転数
を示す信号として出力される。To explain the operation of the electromagnetic pickup l configured as above, in FIG. 1, a predetermined magnetic flux distribution is formed in the core 2 by the permanent magnet 3, and the cross-sectional area of the tip 2a is The tip part 2a is smaller than the
The magnetic flux leakage from the magnet is suppressed, resulting in the optimum magnetic flux density. When the rotating body 20 rotates, the magnetic flux distribution changes each time the toothed portion 21 faces the tip end surface of the core 2. As a result, the amount of magnetic flux interlinking with the coil 4 changes, and the output is in the opposite direction when approaching the teeth 21 of the rotating body 20 and when moving away from the tooth 21 of the rotating body 20. An alternating current voltage corresponding to the rotation of 20 is induced and output as a signal indicating the rotation speed.
本発明は上述のように構成されているので、以下に記載
する効果を奏する。Since the present invention is configured as described above, it produces the effects described below.
即ち、本発明の電磁誘導式回転検出器においては、テー
パ部を有する磁性体を備え、これに対応してボビンの軸
部にテーパ面を有するか、この軸部には小径端から大径
端に至る溝か形成されており、コイルの巻線はこの溝に
案内されるので、巻き始め時の巻回作業か容易であり、
良好な作業性か得られる。That is, the electromagnetic induction rotation detector of the present invention is provided with a magnetic body having a tapered portion, and correspondingly, the shaft portion of the bobbin has a tapered surface, or the shaft portion has a tapered surface from a small diameter end to a large diameter end. A groove is formed leading to the coil, and the winding of the coil is guided by this groove, making it easy to wind at the beginning of winding.
Good workability can be obtained.
第１図は本発明の一実施例に係る電磁ピックアップの縦
断面図、第２図は第１図に示す電磁ピックアップを側方
からみた縦断面図、第３図は本発明の一実施例のターミ
ナルとコイルとの接続部を示す部分断面図、第４図は同
、コネクタの筒体部の一部及びボビンの側面図、第５図
は第４図のボビンにコイルを巻回した状態の正面図、第
６図は第４図のボビンにコイルを巻回した状態の側面図
である。
ｌ・・・電磁ピックアップ（電磁誘導式回転検出器）２
・・・コア（磁性体）、３・・・永久磁石（磁性体）。
４・・・コイル、 ５・・・ボビン、 ５ａ・・
・筒体部。
５ｂ・・・テーパ部、 ５ｃ・・・筒体部。
５ｆ、５ｇ・・・係合突起、 ５ｈ・・・溝。
５ｉ・・・係止突起、 ６・・・コネクタ。
６ａ・・・筒体部、 ６ｂ・・・接合部、 ６
ｃ・・・段部。
６ｄ、６ｅ・・・延出部、 ６ｆ、６ｇ・・・係合
孔。
７・・・ターミナル、 ８・・・ケース。
９・・・フランジ、 １０・・・０リング。
１１・・・スプリングワッシャ。FIG. 1 is a longitudinal sectional view of an electromagnetic pickup according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the electromagnetic pickup shown in FIG. Fig. 4 is a partial cross-sectional view showing the connection between the terminal and the coil; Fig. 4 is a side view of a part of the cylindrical body of the connector and the bobbin; Fig. 5 is a diagram showing the state in which the coil is wound around the bobbin in Fig. 4. FIG. 6 is a front view and a side view of the bobbin shown in FIG. 4 with a coil wound thereon. l... Electromagnetic pickup (electromagnetic induction rotation detector) 2
... Core (magnetic material), 3... Permanent magnet (magnetic material). 4... Coil, 5... Bobbin, 5a...
・Cylinder part. 5b... Taper part, 5c... Cylindrical body part. 5f, 5g...engaging protrusion, 5h...groove. 5i...locking protrusion, 6...connector. 6a...Cylinder part, 6b...Joint part, 6
c...Dan section. 6d, 6e...extending portion, 6f, 6g...engaging hole. 7...Terminal, 8...Case. 9...Flange, 10...0 ring. 11... Spring washer.
Claims (1)
テーパ部を有する磁性体にコイルを巻装し、回転体の回
転面に前記磁性体の軸方向先端面が対向するように配置
する電磁誘導式回転検出器において、前記磁性体のテー
パ部に対応したテーパ面を有する軸部に前記コイルを構
成する巻線を巻回すると共に、少くとも前記磁性体の一
部を中空部内に収容する筒体のボビンと、該ボビンと接
合すると共に前記コイルの巻線に電気的に接続するター
ミナルを内蔵するコネクタとを備え、前記ボビンに前記
軸部の小径端から大径端に至る溝を形成し、該溝を介し
て前記巻線を案内するようにしたことを特徴とする電磁
誘導式回転検出器。(1) A coil is wound around a magnetic material having a tapered part whose cross-sectional area gradually increases in the axial direction from the distal end to the proximal end, so that the axial end surface of the magnetic material faces the rotating surface of the rotating body. In the electromagnetic induction rotation detector to be arranged, a winding constituting the coil is wound around a shaft portion having a tapered surface corresponding to the tapered portion of the magnetic material, and at least a part of the magnetic material is wound inside a hollow portion. a cylindrical bobbin accommodated in the bobbin, and a connector incorporating a terminal that is joined to the bobbin and electrically connected to the winding of the coil, the bobbin extending from a small diameter end to a large diameter end of the shaft portion. An electromagnetic induction type rotation detector characterized in that a groove is formed and the winding is guided through the groove.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2318762A JP2981679B2 (en) | 1990-11-22 | 1990-11-22 | Electromagnetic induction type rotation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2318762A JP2981679B2 (en) | 1990-11-22 | 1990-11-22 | Electromagnetic induction type rotation detector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04188077A true JPH04188077A (en) | 1992-07-06 |
| JP2981679B2 JP2981679B2 (en) | 1999-11-22 |
Family
ID=18102659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2318762A Expired - Fee Related JP2981679B2 (en) | 1990-11-22 | 1990-11-22 | Electromagnetic induction type rotation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2981679B2 (en) |
-
1990
- 1990-11-22 JP JP2318762A patent/JP2981679B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP2981679B2 (en) | 1999-11-22 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |