JPH04188078A - Electromagnetic induction type rotation detector - Google Patents
Electromagnetic induction type rotation detectorInfo
- Publication number
- JPH04188078A JPH04188078A JP31876390A JP31876390A JPH04188078A JP H04188078 A JPH04188078 A JP H04188078A JP 31876390 A JP31876390 A JP 31876390A JP 31876390 A JP31876390 A JP 31876390A JP H04188078 A JPH04188078 A JP H04188078A
- Authority
- JP
- Japan
- Prior art keywords
- bobbin
- terminal
- winding
- coil
- 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.)
- Pending
Links
- 230000005674 electromagnetic induction Effects 0.000 title claims description 16
- 238000004804 winding Methods 0.000 claims abstract description 41
- 239000000696 magnetic material Substances 0.000 claims description 11
- 230000004907 flux Effects 0.000 description 8
- 230000000694 effects Effects 0.000 description 3
- 238000002485 combustion reaction 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
- 238000007796 conventional method Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process 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
- 229910000679 solder Inorganic materials 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
- 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が知られている。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が提案されている。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. The publication proposes forming the magnetic body into a truncated cone shape 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 that faces the magnetic body. . 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ちのであるか、コイ
ル等の具体的構造は明確にされていない。例えばボビン
にターミナルを装着し、このターミナルの接続部にコイ
ルの巻線を接続する場合において、従前の方法に従うと
すれば、作業性の観点から予めターミナルの接続部を立
設しておき、これにコイルの巻線を巻き付けた後接続部
をボビンに向けて屈曲させることとなる。このとき、コ
イルの巻線にたるみか生じ１巻線かターミナルの下方に
位置した状態でターミナルを屈曲させると、巻線かター
ミナル間に挟まれて押し潰されることとなり、場合によ
っては巻線か断線するおそれかある。In the above-mentioned prior art, the specific structure of the coil etc. has not been clarified, perhaps because the shape of the magnetic body has been improved in view of the relationship between the rotating body and the magnetic body. For example, when attaching a terminal to a bobbin and connecting a coil winding to the connection part of this terminal, if you follow the conventional method, from the viewpoint of workability, you should set the connection part of the terminal upright in advance, and then connect it to the terminal connection part. After winding the coil, the connecting portion is bent toward the bobbin. At this time, if there is slack in the winding of the coil and the terminal is bent while it is located below the first winding or the terminal, it will be pinched between the winding or the terminal and crushed, and in some cases the winding may There is a risk of wire breakage.
そこで本発明は電磁誘導式回転検出器において、コイル
の巻線をターミナルに接続するに当り巻線を損なうこと
なく容易に接続し得るようにすることを目的とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an electromagnetic induction type rotation detector in which the winding of a coil can be easily connected to a terminal without damaging the winding.
上述の目的を達成するため、本発明は磁性体にコイルを
巻装し、回転体の回転面に前記磁性体の軸方向先端面か
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
、前記コイルを構成する巻線を巻回すると共に前記磁性
体の少くとも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第１のターミナルを内蔵す
るコネクタと、前記ボビンに装着し一部か前記第１のタ
ーミナルと重合すると共に前記ボビンの軸方向で前記コ
イルの巻回部近傍に延出する接続部を有する第２のター
ミナルとを備え、該第２のターミナルの接続部に対し前
記ボビンの軸と直交する方向に偏位した位置の前記ボビ
ンの外面に係止部を設け、該係止部を経由して前記コイ
ルの巻線を前記第２のターミナルの接続部に接続するよ
うにしたものである。In order to achieve the above-mentioned object, the present invention provides an electromagnetic induction rotation detector in which a coil is wound around a magnetic body, and the axial end face of the magnetic body is arranged so as to face the rotating surface of the rotary body. a cylindrical bobbin around which a winding constituting a coil is wound and in which at least a portion of the magnetic material is housed in a hollow portion; a connector connected to the bobbin and containing a first terminal; a second terminal that is attached and partially overlaps with the first terminal and has a connection portion that extends in the axial direction of the bobbin near the winding portion of the coil, the connection of the second terminal; A locking portion is provided on the outer surface of the bobbin at a position offset in a direction perpendicular to the axis of the bobbin with respect to the second terminal, and the winding of the coil is connected to the connection portion of the second terminal via the locking portion. It was designed to connect to.
前記係止部は、前記ボビンの外面から突出する係止突起
とすることかできる。The locking portion may be a locking projection protruding from the outer surface of the bobbin.
尚、前記第１のターミナルに前記第２のターミナルの接
続部を形成し、前記第２のターミナルを廃することとし
てもよい。Note that a connection portion for the second terminal may be formed in the first terminal, and the second terminal may be eliminated.
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、コネクタに内蔵された第１のターミナルと、これに
重合するようにボビンに装着された第２のターミナルを
有し、第２のターミナルの巻線の接続部に対しボビンの
軸と直交する方向に偏位した位置のボビンに係止部が設
けられている。従って、第２のターミナルの接続部を一
部ボビンに対し立設した状態としておき、コイルの巻線
を係止部を経由して第２のターミナルの接続部に巻付け
た後、当該接続部をボビンに向けて屈曲させた場合にお
いても、コイルの巻線は係止部に係止され第２のターミ
ナルの下方に位置することがないので、巻線が第２のタ
ーミナルに挟まれることなく確実に接続される。The electromagnetic induction rotation detector configured as described above has a first terminal built into the connector and a second terminal attached to the bobbin so as to overlap with the first terminal. A locking portion is provided on the bobbin at a position offset from the connection portion of the winding in a direction perpendicular to the axis of the bobbin. Therefore, a part of the connection part of the second terminal is left upright with respect to the bobbin, and after winding the coil winding around the connection part of the second terminal via the locking part, the connection part is Even when the coil is bent toward the bobbin, the winding of the coil is locked in the locking part and is not located below the second terminal, so the winding is not pinched by the second terminal. Connected securely.
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か変化する。これ
により、コイルに対する鎖交磁束か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か出力される。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. When a rotating body disposed opposite to the magnetic body rotates, the air gap formed between the rotary 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 in accordance with 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、テーバ面か形成されたテ
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、本発明にいう第１のターミナルたる一対
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６
ｂを有し、各々の軸か略直交するように形成されており
、ターミナル７の一端か延出部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か一
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の係合突起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か形成されており、
これに０リング１０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か収
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か介装されており、コア２
及び永久磁石３がテーバ部５ｂ方向に押圧されている。In the connector 6, a pair of terminals (only one terminal is shown as 7 in the figure), which are the first terminals referred to in the present invention, are molded with insert resin, and are molded into the shape shown in FIGS. 1 and 2. That is, the cylindrical body portion 6a having a cylindrical shape with a bottom and the joint portion 6
b, and are formed to be substantially perpendicular to each axis, with one end of the terminal 7 extending from the cylindrical body part 6a as an extension part 7a, and the other end extending into the recess of the joint part 6b as a connecting terminal 7b. It is extending. 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 engaging protrusions 5f and 5g of the bobbin 5 are engaged with these retaining holes 6f and 6g, so that the bobbin 5 and the connector 6 are joined, forming a so-called snap-fit structure. Furthermore, an annular groove 6h is formed on the outer periphery of the cylindrical body portion 6a,
An O-ring 10 is fitted onto this. Thus, the core 2 and the permanent magnet 3 are housed in the hollow part of the cylindrical body part 6a and the bobbin 5, but a spring washer 11 is interposed between the end face of the permanent magnet 3 and the bottom face of the cylindrical body part 6a. Core 2
And the permanent magnet 3 is pressed in the direction of the tapered portion 5b.
第１図及び第３図に示すように、ボビン５の筒体部５Ｃ
には本発明にいう第２のターミナルたる一対のターミナ
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４の巻線の端部が巻回され
半田接合される。As shown in FIGS. 1 and 3, the cylindrical body portion 5C of the bobbin 5
A pair of terminals (only one is shown as 17 in the figure), which are the second terminals according to the present invention, are fixed to the terminal.
The ends of the windings of the coil 4 are wound around each connection portion 17a and joined by solder.
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７
ａと重合しプロジェクション溶接によって接合される。Each of the pair of terminals 17 includes the bobbin 5 and the cylindrical body portion 6a.
are joined as described above, the extension 7 of the terminal 7
It is polymerized with a and joined by projection welding.
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。After being joined in this way, an insulating tape 15 (not shown in FIGS. 1 and 3) is wound as shown in FIG.
Similarly, an insulating tape 14 is wound around the outer periphery of the coil 4.
第４図は電磁ピックアップＩ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１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 I, in which the case 8, coil 4 and insulating tape 14 are removed from the electromagnetic pickup 1 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の外面には本発明にいう係止部たる係止突起
５１が設けられている。筒体部５Ｃには前述のようにタ
ーミナル１７か固着されており、舌片状の接続部＋７ａ
が立設されている（第５図の二点鎖線参照）。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. Further, a locking protrusion 51, which is a locking portion according to the present invention, is provided on the outer surface of the cylindrical body portion 5c on the extension of the groove 5h. As mentioned above, the terminal 17 is fixed to the cylinder part 5C, and the tongue-shaped connection part +7a
is erected (see the two-dot chain line in Figure 5).
而して、コイル４の巻線かボビン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）を介して巻線か導出され、
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
が第５図に矢印で示すように屈曲されボビン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＋７８の下
方に位置することはなく、従って巻線が接続部１７ａに
押し潰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 as shown by the arrow in FIG. 5 and becomes parallel to the axis of the bobbin 5. At this time, since the winding of the coil 4 passes through the locking protrusion 51, it is not located below the connection part +78 as shown in FIG. That's not it.
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か形成される。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 forms 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. A pair of metal collars 12 are insert-molded into the flange 9 as shown in FIG.
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が変化する。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
力が逆方向になるため、電磁誘導作用によりコイル４に
回転体２０の回転に応じた交流電圧が誘起され、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 distal 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 tooth section 21 of the rotating body 20 and when moving away from it. An alternating current voltage corresponding to the rotation of the motor 20 is induced and output as a signal indicating the number of rotations.
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、コネ
クタに内蔵された第１のターミナルと、これに重合する
ようにボビンに装着された第２のターミナルを有し、ボ
ビンの外面の所定位置に設けられた係止部を経由してコ
イルの巻線を第２のターミナルの接続部に接続すること
かできる。従って、第２のターミナルの接続部を一部ボ
ビンに対し立設した状態としておき、コイルの巻線を巻
き付けた後に当該接続部をボビンに向けて屈曲させるよ
うにした場合においても、コイルの巻線は係止部に係止
されているので、巻線が第２のターミナルに挟まれるこ
となく確実に接続することかでき、良好な作業性が得ら
れる。That is, the electromagnetic induction rotation detector of the present invention has a first terminal built into the connector, a second terminal attached to the bobbin so as to overlap with the first terminal, and a second terminal attached to the bobbin at a predetermined position on the outer surface of the bobbin. The winding of the coil can be connected to the connection part of the second terminal via the locking part provided on the terminal. Therefore, even if the connection part of the second terminal is left partially standing up against the bobbin and the connection part is bent toward the bobbin after the coil winding is wound, the coil winding Since the wire is locked in the locking portion, the winding can be reliably connected without being pinched by the second terminal, resulting in good workability.
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。
１・・・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。
５１・・・係止突起（係止部）、 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（第１のターミナル）。
７ａ・・・延出部、 ８・・・ケース、 ９・・・
フランジ。
１０・・・０リング、 １１・・・スプリングワッ
シャ。
１７・・・ターミナル（第２のターミナル）。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. 1... 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. 51... Locking protrusion (locking part), 6... Connector. 6a...Cylinder part, 6b...Joint part, 6
c...Dan section. 6d, 6e...extending portion, 6f, 6g...engaging hole. 7...Terminal (first terminal). 7a... Extension part, 8... Case, 9...
flange. 10...0 ring, 11...spring washer. 17...Terminal (second terminal).
Claims (1)
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、前記コイルを構成する巻線を
巻回すると共に前記磁性体の少くとも一部を中空部内に
収容する筒体のボビンと、該ボビンと接合すると共に第
１のターミナルを内蔵するコネクタと、前記ボビンに装
着し一部が前記第１のターミナルと重合すると共に前記
ボビンの軸方向で前記コイルの巻回部近傍に延出する接
続部を有する第２のターミナルとを備え、該第２のター
ミナルの接続部に対し前記ボビンの軸と直交する方向に
偏位した位置の前記ボビンの外面に係止部を設け、該係
止部を経由して前記コイルの巻線を前記第２のターミナ
ルの接続部に接続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) In an electromagnetic induction rotation detector in which a coil is wound around a magnetic body and arranged so that the axial end surface of the magnetic body faces the rotating surface of the rotating body, the winding constituting the coil is wound. a cylindrical bobbin that is rotated and accommodates at least a portion of the magnetic material in a hollow portion; a connector that is connected to the bobbin and has a built-in first terminal; a second terminal having a connection portion that overlaps with the terminal of the bobbin and extends near the winding portion of the coil in the axial direction of the bobbin; A locking portion is provided on the outer surface of the bobbin at a position offset in an orthogonal direction, and the winding of the coil is connected to the connection portion of the second terminal via the locking portion. Features an electromagnetic induction rotation detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31876390A JPH04188078A (en) | 1990-11-22 | 1990-11-22 | Electromagnetic induction type rotation detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP31876390A JPH04188078A (en) | 1990-11-22 | 1990-11-22 | Electromagnetic induction type rotation detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04188078A true JPH04188078A (en) | 1992-07-06 |
Family
ID=18102670
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP31876390A Pending JPH04188078A (en) | 1990-11-22 | 1990-11-22 | Electromagnetic induction type rotation detector |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04188078A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0946114A (en) * | 1995-07-31 | 1997-02-14 | Fujitsu Ten Ltd | Coil case |
-
1990
- 1990-11-22 JP JP31876390A patent/JPH04188078A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0946114A (en) * | 1995-07-31 | 1997-02-14 | Fujitsu Ten Ltd | Coil case |
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