JP3941148B2 - Manufacturing method of magnetic sensor - Google Patents

Manufacturing method of magnetic sensor Download PDF

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Publication number
JP3941148B2
JP3941148B2 JP05456697A JP5456697A JP3941148B2 JP 3941148 B2 JP3941148 B2 JP 3941148B2 JP 05456697 A JP05456697 A JP 05456697A JP 5456697 A JP5456697 A JP 5456697A JP 3941148 B2 JP3941148 B2 JP 3941148B2
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Japan
Prior art keywords
terminal portions
magnetic sensor
connector
holder
magnetoresistive element
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JP05456697A
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Japanese (ja)
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JPH10253729A (en
Inventor
修次 瀬口
正憲 鮫島
正孝 田川
▲丈▼志 増井
英弘 近藤
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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  • Measurement Of Length, Angles, Or The Like Using Electric Or Magnetic Means (AREA)
  • Transmission And Conversion Of Sensor Element Output (AREA)
  • Measuring Magnetic Variables (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、磁気センサの製造方法に関するものである。
【0002】
【従来の技術】
従来の磁気センサとしては、実公平7−38815号公報に記載されたものが知られている。
【0003】
以下、従来の磁気センサについて、図面を参照しながら説明する。
【0004】
図6(a)は従来の磁気センサの斜視図、図6(b)は同磁気センサの分解斜視図である。
【0005】
図6(a)(b)において、1はホルダで、このホルダ1は磁気抵抗素子取付部1aと支持台部1bにより構成されている。そして、この支持台部1bには複数の外部引出端子部2aと、それらにそれぞれ接続され、かつ一端がL字状に折曲げられた複数の端子部2bとがあらかじめ埋設されている。3はホルダ1の磁気抵抗素子取付部1aに装着され、かつ側面がホルダ1のガイド1cで規制され、さらに複数の電極部4bに前記複数の端子部2bが圧接して嵌着された磁気抵抗素子で、この磁気抵抗素子3には磁気抵抗素子3のパターン4aと複数の電極部4bが形成され、かつこの磁気抵抗素子3のパターン4aと複数の電極部4b電気的に接続されている。5は保護膜で、この保護膜5は磁気抵抗素子3のパターン4aをコーティングしている。
【0006】
以上のように構成された従来の磁気センサについて、以下にその製造方法を説明する。
【0007】
図7は従来の磁気センサの製造工程図である。
【0008】
まず、ガラス等からなる基板上に複数の電極部およびNiFe膜あるいはNiCo膜等からなる薄膜層を蒸着し、フォトリソグラフィまたはエッチングの方法により、所定のパターンにした後、保護膜5を蒸着、あるいは印刷して磁気抵抗効果素子を形成する。
【0009】
一方、リン青銅にはんだメッキを施した板状のものを複数の外部引出端子部と複数の端子部よりなるフープ状の所定の形状に打ち抜き、フープの所定箇所に樹脂成形を施し、複数の端子、複数の外部引出端子を所定位置で切断、複数の端子を折り曲げてホルダを形成している
【0010】
最後に、磁気抵抗素子をホルダのガイドに沿って挿入し、磁気抵抗素子取付部に取付け、その後、電極端子部と複数の端子部とをはんだコテ等の外部応力により圧接して嵌着させることにより、磁気センサを製造するものである。
【0011】
以上のように構成され、かつ製造された従来の磁気センサについて、以下にその動作を説明する。
【0012】
図8は、従来の磁気センサを磁気式ロータリーエンコーダに組込んだ使用例を示す斜視図である。
【0013】
図8に示すように、外周にN極およびS極を交互に所定のピッチで着磁されたロータリーエンコーダ6の外周面に対向し一定の間隔を隔てて内部に磁気抵抗素子とホルダを有する磁気センサ8が配置されている。ロータリーエンコーダ6が回転することにより、磁気センサ8を横切る磁界が変化し、この磁界の変化を磁気センサ8の磁気抵抗素子のパターンで読み取り、電気的に接続された電極端子、複数の端子部を介して、複数の外部引出端子部2aに電気信号として取出し、ロータリーエンコーダ6の回転速度および回転角度を検出し制御するものである。
【0014】
【発明が解決しようとする課題】
上記した従来の構成では、磁気抵抗素子3とホルダ1との取付方法が磁気抵抗素子3の一端をL字状に折曲げられた複数の端子部2bに挿入して装着するようにしているため、L字状に折り曲げられる複数の端子部2bの曲げ精度がかなり要求され、例えば、複数の端子部2bの曲げ角度が90度より小さいと、磁気抵抗素子3が挿入できず、また反対に、複数の端子部2bの曲げ角度が90度より大きいと、磁気抵抗素子3の複数の電極部4bと複数の端子部2bとが非接触となり、そしてその導通をとるためには、後で外部応力を加えながらはんだコテ、あるいは熱圧着の方法により圧接させてはんだ付けを行う必要があるため、非常に作業が面倒であり、量産化する際に工数がかかるという課題を有していた。
【0015】
また、従来の構成では、複数の端子部2bが十分に曲げられていないため、複数の電極部4bから剥離しようとする方向に応力が存在し、そして熱ストレス等により複数の端子部2bが剥離し、前記複数の電極部4bとの導通が得られなくなるという課題を有していた。
【0016】
本発明は上記従来の課題を解決するもので、工数のかからない磁気センサの製造方法を提供することを目的とするものである。
【0017】
【課題を解決するための手段】
上記目的を達成するために本発明は、複数の外部引出端子部およびそれらにそれぞれ接続された複数の端子部よりなる複数のリードを有し、前記リードの端子部側を共通接続部によりフープ本体に連続させられかつ前記リードの外部引出端子部をフープ本体に連続させたフープの所定箇所にブラケットを樹脂成形により形成する工程と、前記フープの複数の端子部側のリードに対して前記複数の端子部が前記フープ本体から分離されることのないように前記共通接続部を切断した後に前記ブラケットの所定箇所で前記複数の端子部を同時に曲げ加工する工程と、前記曲げ加工された複数の端子部、前記複数の外部引出端子部をそれぞれ独立するように分離する工程を含み構成される前記コネクタをホルダのコネクタ挿入部に挿入するとき、前記ホルダの磁気抵抗素子取付部にあらかじめ取付られた前記複数の電極部を有する前記磁気抵抗素子の前記電極部と前記コネクタの複数の端子部とが電気的に接続されるようにしたものである。
【0018】
この製造方法によれば、磁気抵抗素子の複数の電極部と複数の端子部の十分な接触を得ることができ、外部応力を加えずにはんだ付けが容易にできる。また、熱ストレス等により複数の端子が剥離するという課題を解決することができる。
【0019】
【発明の実施の形態】
本発明の請求項1に記載の発明は、複数の外部引出端子部およびそれらにそれぞれ接続された複数の端子部よりなる複数のリードを有し、前記リードの端子部側を共通接続部によりフープ本体に連続させられ、かつ前記リードの外部引出端子部をフープ本体に連続させたフープの所定箇所にブラケットを樹脂成形により形成する工程と、前記フープの複数の端子部側のリードに対して前記複数の端子部が前記フープ本体から分離されることのないように前記共通接続部を切断した後に前記ブラケットの所定箇所で前記複数の端子部を同時に曲げ加工する工程と、前記曲げ加工された複数の端子部、前記複数の外部引出端子部をそれぞれ独立するように分離する工程を含み構成されるコネクタを前記ホルダのコネクタ挿入部に挿入するとき、前記ホルダの磁気抵抗素子取付部にあらかじめ取付られた前記複数の電極部を有する前記磁気抵抗素子の前記電極部と前記コネクタとの複数の端子部とが電気的に接続されるものであり、コネクタ内の複数の端子部の曲げ加工が安定して行えるという作用を有するものである。
【0020】
(実施の形態1)
以下、本発明の実施の形態1における磁気センサおよびその製造方法について、図面を参照しながら説明する。
【0021】
図1(a)は本発明の実施の形態1における磁気センサの斜視図、図1(b)は同磁気センサの分解斜視図である。
【0022】
11は磁気抵抗素子取付部11a、支持台部11bおよびコネクタ挿入部11cを有するホルダである。このホルダ11の磁気抵抗素子取付部11aの周辺には位置決め用のガイド11dが形成され、かつコネクタ挿入部11c内には被係止部11eが形成されている。12はホルダ11の位置決め用のガイド11dに沿って磁気抵抗素子取付部11aに装着されてなる磁気抵抗素子である。この磁気抵抗素子12には磁気抵抗素子12のパターン13aと複数の電極部13bが形成されており、磁気抵抗素子12のパターン13aと電極部13bが電気的に接続されている。14は保護膜であり、磁気抵抗素子12のパターン13aをコーティングしている。21はコネクタで、このコネクタ21はホルダ11のコネクタ挿入部11cに合致する形状および大きさのブラケット21aと、複数の外部引出端子部21bおよびこの複数の外部引出端子部21bに電気的に接続された複数の端子部21cにより構成されている。この複数の端子部21cは、あらかじめブラケット21aに形成されたテーパ21dに沿って鋭角に曲げられており、そして曲げられた複数の端子部の一部がテーパ21dに形成された複数の溝21eに装着されている。また、ブラケット21aには、ホルダ11のコネクタ挿入部11c内に形成された被係止部11eに合致する係止部21fと、コネクタ21がホルダ11のコネクタ挿入部11cに挿入されたとき、その動きを規制するストッパ21gが形成されている。コネクタ21はホルダ11のコネクタ挿入部11cに挿入されており、磁気抵抗素子12の複数の電極部13bとコネクタの複数の端子部21cとがそれぞれ電気的に接続されている。
【0023】
以上のように構成された本発明の実施の形態1における磁気センサについて、以下にその製造方法を説明する。
【0024】
図2は本発明の実施の形態1における磁気センサの工程図、図3は同要部であるコネクタの加工手順を示した加工図である。
【0025】
まず、図3(a)に示すように、リン青銅にはんだメッキを施した板状のフープ材を複数の外部引出端子部21b、複数の端子部21cおよび共通端子部22等が含まれた所定の形状に打ち抜く。
【0026】
次に、図3(b)に示すように、打ち抜きされたフープの所定箇所にテーパ21d、複数の溝21e、係止部21f等が形成されたブラケット21aを樹脂成形する。
【0027】
次に、図3(c)に示すように、ブラケット21aを形成した後、複数の端子部21cがフープ本体からそれぞれ分離されることのないように、共通接続部22をA−Aで切断する。
【0028】
次に、図3(d)に示すように、A−Aで共通接続部を切断されたフープの複数の端子部21cはブラケット21aの所定箇所で、ブラケット21aと複数の端子部21c間のなす角度が鋭角になるように、テーパ21dに沿って同時に曲げられる。また、曲げられた複数の端子部21cが左右方向に動かないように、複数の溝21eに複数の端子部21cの一部が装着される。次に、図3(e)に示すように、折り曲げられた複数の端子部21cおよび複数の外部引出端子部21bをそれぞれ独立、分離するようにB−Bで切断を行い、その後C−Cで切断すれば図3(f)に示すようなコネクタ21が完成する。ここで、最初にB−Bで切断を行うと、複数の端子部21cのそれぞれが独立するため、曲げ加工時に曲げ深さにばらつきが生じ易い。したがって、本発明の実施の形態1では、A−Aで切断を行った後、曲げ加工を施し、そしてB−Bで切断を行っている。また、B−Bで切断を行うと、複数の端子部21cが独立するため、隣同士の端子間がショートしやすくなる。したがって、本発明の実施の形態1では、複数の溝21eに複数の端子部21cの一部を装着させ、端子の動きを規制している。
【0029】
一方、ガラス等からなる基板上に複数の電極部、およびNiFe膜あるいはNiCo膜等からなる薄膜層を蒸着し、フォトリソグラフィまたはエッチングの方法により、所定の磁気抵抗素子のパターンにした後、保護膜を蒸着、あるいは印刷してなる磁気抵抗素子12を、樹脂成形により成形されたホルダ11の位置決め用のガイド11dに沿って、磁気抵抗素子取付部11aにUV樹脂あるいは熱硬化性樹脂を介して取り付ける
【0030】
次に、コネクタのブラケットを磁気抵抗素子が取付られたホルダのコネクタ挿入部に挿入する。この際、ブラケットの挿入は、コネクタの複数の端子部の曲げ加工を行った形状が約90度になるまで行うのが望ましく、コネクタの挿入を規制するストッパをこのような位置になるように、成形時に形成しておくことにより、複数の端子部が磁気抵抗素子の複数の電極部を押し当てられながら約90度まで曲げられるため、結果的に複数の端子部が磁気抵抗素子の複数の電極部をそれぞれ圧接し、電気的に接続されることになる。また、コネクタのブラケットのホルダからの抜け防止のため、ブラケットには係止部が、ホルダのコネクタ挿入部内には被係止部がそれぞれコネクタの挿入方向に対する斜面と比べ、コネクタの抜き方向に対する斜面の角度を大として成形時に形成されており、係止部と被係止部が引っ掛かり抜けが防止されている。以上のようにして、ホルダとコネクタとは完全に固定され、一体化した構造となる。
【0031】
最後に、安定した電気的接続のため、必要に応じてコネクタの複数の端子部と磁気抵抗素子の複数の電極部をはんだ付けするが、本発明の実施の形態1では、外部応力を加えずに、はんだコテ、リフロー等で簡単にはんだ付けが可能である。また、最初から複数の端子部と複数の電極部が接触しているため、熱ストレス等により複数の端子部が複数の電極部から剥離することはない。
【0032】
(実施の形態2)
以下、本発明の実施の形態2における磁気センサについて、図面を参照しながら説明する。
【0033】
図4(a)は本発明の実施の形態2における磁気センサの斜視図、図4(b)は同磁気センサの分解斜視図である。
【0034】
本発明の実施の形態2と上記した本発明の実施の形態1との相違点は、ホルダ31の側面に凸部31a、被係止部31bが形成されている点と、コネクタ41にホルダ31の凸部31aに合致する形状および大きさの凹部41aおよび係止部41bが形成されている点である。この構成により、コネクタの凹部41aを磁気抵抗素子32が取付られたホルダの凸部31aに挿入固定すれば、上記した本発明の実施の形態1と同様の構成を得ることができる。本発明の実施の形態2の構成によりロータリーエンコーダが低位置に設置される場合、これに対向する磁気抵抗素子のパターンも低位置に配置できるので、有効な構成である。
【0035】
(実施の形態3)
以下、本発明の実施の形態3における磁気センサについて、図面を参照しながら説明する。
【0036】
図5(a)は本発明の実施の形態3における磁気センサの斜視図、図5(b)は同磁気センサの分解斜視図である。
【0037】
図5(a)(b)において、51はホルダで、このホルダ51には、支持台部51a,51bが磁気抵抗素子52のパターン形成面と平行な面となるようにホルダ51の取付部の上下に形成されている。この構成により、磁気抵抗素子52が取り付けられたホルダ51のコネクタ挿入部51cにコネクタ61を挿入固定すれば、上記した本発明の実施の形態1および2と同様の効果を得ることができる。
【0038】
【発明の効果】
以上のように本発明は、あらかじめ磁気抵抗素子が取り付けられたホルダのコネクタ挿入部に磁気抵抗素子の複数の電極部とコネクタの複数の端子部とが電気的に接続されるようにコネクタを挿入することにより、コネクタの複数の端子部の折り曲げ精度はあまり必要とせずに、磁気抵抗素子の複数の電極部とコネクタの複数の端子部との十分な接触を得ることができ、外部応力を加えずにはんだ付けが容易にできる磁気センサの製造方法を提供できるものである。
【0039】
また、最初から複数の端子部と複数の電極部が接触しているため、熱ストレス等により複数の端子部が複数の電極部から剥離しにくい磁気センサの製造方法を提供できるものである。
【図面の簡単な説明】
【図1】 (a)本発明の実施の形態1における磁気センサの斜視図
(b)同磁気センサの分解斜視図
【図2】 同磁気センサの製造工程
【図3】 同要部であるコネクタの加工手順を示した図
【図4】 (a)本発明の実施の形態2における磁気センサの斜視図
(b)同磁気センサの分解斜視図
【図5】 (a)本発明の実施の形態3における磁気センサの斜視図
(b)同磁気センサの分解斜視図
【図6】 (a)従来の磁気センサの斜視図
(b)同磁気センサの分解斜視図
【図7】 同磁気センサの製造工程
【図8】 同磁気センサの使用例を示す斜視図
【符号の説明】
11 ホルダ
11a 磁気抵抗素子取付部
11b 支持台部
11c コネクタ挿入部
11e 被係止部
12 磁気抵抗素子
13b 電極部
21 コネクタ
21a ブラケット
21b 外部引出端子部
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a magnetic sensor .
[0002]
[Prior art]
As a conventional magnetic sensor, one described in Japanese Utility Model Publication No. 7-38815 is known.
[0003]
Hereinafter, a conventional magnetic sensor will be described with reference to the drawings.
[0004]
FIG. 6A is a perspective view of a conventional magnetic sensor, and FIG. 6B is an exploded perspective view of the magnetic sensor .
[0005]
6 (a) and 6 (b) , reference numeral 1 denotes a holder , and the holder 1 includes a magnetoresistive element mounting portion 1a and a support base portion 1b. A plurality of external lead terminal portions 2a and a plurality of terminal portions 2b that are respectively connected to them and bent at one end in an L shape are embedded in the support base portion 1b. 3 is attached to the magnetoresistive element attaching portion 1a of the holder 1, and the side surface is restricted by the guide 1c holder 1, further magnetoresistive the plurality of terminal portions 2b into the plurality of electrode portions 4b are fitted in pressure contact the element, and this is the magneto-resistance element 3 pattern 4a and a plurality of electrode portions 4b of the magnetoresistive element 3 is formed, and the pattern 4a and a plurality of electrode portions 4b of the magneto-resistive element 3 is electrically connected . Reference numeral 5 denotes a protective film, and the protective film 5 coats the pattern 4 a of the magnetoresistive element 3.
[0006]
About the conventional magnetic sensor comprised as mentioned above, the manufacturing method is demonstrated below.
[0007]
FIG. 7 is a manufacturing process diagram of a conventional magnetic sensor.
[0008]
First, a plurality of electrode portions and a thin film layer made of NiFe film or NiCo film are vapor-deposited on a substrate made of glass or the like, and after a predetermined pattern is formed by photolithography or etching, the protective film 5 is vapor-deposited, or A magnetoresistive element is formed by printing.
[0009]
On the other hand, a plate of phosphor bronze plated with solder is punched into a predetermined hoop-like shape composed of a plurality of external lead-out terminal portions and a plurality of terminal portions, and resin molding is applied to a predetermined portion of the hoop, and a plurality of terminals The plurality of external lead terminals are cut at predetermined positions, and the plurality of terminals are bent to form a holder .
[0010]
Finally, the magnetoresistive element is inserted along the guide of the holder and attached to the magnetoresistive element mounting portion, and then the electrode terminal portion and the plurality of terminal portions are pressed and fitted by external stress such as a soldering iron. Thus, a magnetic sensor is manufactured.
[0011]
The operation of the conventional magnetic sensor configured and manufactured as described above will be described below.
[0012]
FIG. 8 is a perspective view showing an example of use in which a conventional magnetic sensor is incorporated in a magnetic rotary encoder.
[0013]
As shown in FIG. 8, the magnetic having a magnetoresistive element and the holder therein at regular intervals to face the outer peripheral surface of the rotary encoder 6 which is magnetized at a predetermined pitch N poles and S poles alternately on the outer periphery A sensor 8 is arranged. As the rotary encoder 6 rotates, the magnetic field across the magnetic sensor 8 changes. This change in the magnetic field is read by the pattern of the magnetoresistive element of the magnetic sensor 8, and the electrically connected electrode terminals and a plurality of terminal portions are read. Then, it is taken out as an electrical signal to a plurality of external lead terminals 2a, and the rotational speed and rotational angle of the rotary encoder 6 are detected and controlled.
[0014]
[Problems to be solved by the invention]
In the above-described conventional configuration, the magnetoresistive element 3 and the holder 1 are attached by inserting one end of the magnetoresistive element 3 into a plurality of terminal portions 2b bent in an L shape . The bending accuracy of the plurality of terminal portions 2b bent in an L shape is considerably required. For example, if the bending angle of the plurality of terminal portions 2b is smaller than 90 degrees, the magnetoresistive element 3 cannot be inserted. When the bending angle of the plurality of terminal portions 2b is larger than 90 degrees, the electrodes 4b of the magneto-resistive element 3 and a plurality of terminal portions 2b are out of contact, and to take its conduction, later external stress However , since it is necessary to perform soldering by soldering using a soldering iron or a thermocompression bonding method, the work is very troublesome, and there is a problem that man-hours are required for mass production.
[0015]
Further, in the conventional configuration, since the plurality of terminal portions 2b are not sufficiently bent, there is a stress in the direction of peeling from the plurality of electrode portions 4b, and the plurality of terminal portions 2b are peeled off due to thermal stress or the like. However, there is a problem that conduction with the plurality of electrode portions 4b cannot be obtained.
[0016]
The present invention solves the above-described conventional problems, and an object of the present invention is to provide a method of manufacturing a magnetic sensor that does not require man-hours.
[0017]
[Means for Solving the Problems]
In order to achieve the above object, the present invention has a plurality of leads including a plurality of external lead terminal portions and a plurality of terminal portions respectively connected thereto, and the terminal portion side of the leads is connected to the hoop body by a common connection portion. And forming a bracket by resin molding at a predetermined location of the hoop where the external lead terminal portion of the lead is continued to the hoop main body, and the plurality of leads with respect to the plurality of terminal portion side leads of the hoop A step of simultaneously bending the plurality of terminal portions at a predetermined position of the bracket after cutting the common connection portion so that the terminal portions are not separated from the hoop body; and the plurality of bent terminals A portion including a step of separating the plurality of external lead terminal portions so as to be independent from each other, when inserting the connector into the connector insertion portion of the holder, Said electrode portions and the plurality of terminals of the connector of the magneto-resistive element having a plurality of electrode portions in advance attached to the magnetoresistive element mounting portion of the holder is obtained so as to be electrically connected.
[0018]
According to this manufacturing method, sufficient contact between the plurality of electrode portions and the plurality of terminal portions of the magnetoresistive element can be obtained, and soldering can be easily performed without applying external stress. Further, it is possible to solve the problem that a plurality of terminals are peeled off due to thermal stress or the like.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
The invention according to claim 1 of the present invention includes a plurality of leads each including a plurality of external lead terminal portions and a plurality of terminal portions respectively connected to the external lead terminal portions, and the terminal portion side of the leads is hooped by a common connection portion. A step of forming a bracket by resin molding at a predetermined position of the hoop that is continuous with the main body and the external lead terminal portion of the lead is continuous with the hoop main body, and the lead on the plurality of terminal portion side of the hoop A step of simultaneously bending the plurality of terminal portions at a predetermined position of the bracket after cutting the common connection portion so that the plurality of terminal portions are not separated from the hoop body; and the plurality of bent portions When inserting a connector configured to include a step of separating the plurality of external lead terminal portions so as to be independent from each other into the connector insertion portion of the holder, The electrode part of the magnetoresistive element having the plurality of electrode parts attached in advance to the magnetoresistive element attaching part of the holder and the plurality of terminal parts of the connector are electrically connected, The plurality of terminal portions can be bent stably .
[0020]
(Embodiment 1)
Hereinafter, a magnetic sensor and a manufacturing method thereof according to Embodiment 1 of the present invention will be described with reference to the drawings.
[0021]
FIG. 1A is a perspective view of a magnetic sensor according to Embodiment 1 of the present invention, and FIG. 1B is an exploded perspective view of the magnetic sensor .
[0022]
Reference numeral 11 denotes a holder having a magnetoresistive element mounting portion 11a, a support base portion 11b, and a connector insertion portion 11c. A positioning guide 11d is formed around the magnetoresistive element mounting portion 11a of the holder 11 , and a locked portion 11e is formed in the connector insertion portion 11c. Reference numeral 12 denotes a magnetoresistive element mounted on the magnetoresistive element mounting portion 11 a along the positioning guide 11 d of the holder 11. The magnetoresistive element 12 is formed with a pattern 13a of the magnetoresistive element 12 and a plurality of electrode portions 13b, and the pattern 13a and the electrode portion 13b of the magnetoresistive element 12 are electrically connected. Reference numeral 14 denotes a protective film, which coats the pattern 13 a of the magnetoresistive element 12. 21 is a connector, and this connector 21 is electrically connected to a bracket 21a having a shape and size matching the connector insertion portion 11c of the holder 11 , a plurality of external lead terminal portions 21b, and the plurality of external lead terminal portions 21b. It is composed of a plurality of terminal portions 21c have. The plurality of terminal portions 21c are bent at an acute angle along a taper 21d formed in the bracket 21a in advance , and a part of the plurality of bent terminal portions is formed in a plurality of grooves 21e formed in the taper 21d. It is installed. In addition, when the connector 21 is inserted into the connector insertion portion 11c of the holder 11, the bracket 21a has a locking portion 21f that matches the locked portion 11e formed in the connector insertion portion 11c of the holder 11. A stopper 21g for restricting movement is formed. The connector 21 is inserted into the connector insertion portion 11c of the holder 11, and the plurality of electrode portions 13b of the magnetoresistive element 12 and the plurality of terminal portions 21c of the connector are electrically connected to each other.
[0023]
About the magnetic sensor in Embodiment 1 of this invention comprised as mentioned above, the manufacturing method is demonstrated below.
[0024]
FIG. 2 is a process diagram of the magnetic sensor according to the first embodiment of the present invention, and FIG. 3 is a processing diagram showing a processing procedure of the connector as the main part.
[0025]
First, as shown in FIG. 3 (a), a plate-like hoop material obtained by soldering phosphor bronze with a plurality of external lead terminal portions 21b, a plurality of terminal portions 21c, a common terminal portion 22 and the like are included. Punched into a shape.
[0026]
Next, as shown in FIG. 3B, a bracket 21a in which a taper 21d, a plurality of grooves 21e, a locking portion 21f, and the like are formed at predetermined positions of the punched hoop is resin-molded.
[0027]
Next, as shown in FIG. 3C, after the bracket 21a is formed, the common connection portion 22 is cut along AA so that the plurality of terminal portions 21c are not separated from the hoop body. .
[0028]
Next, as shown in FIG. 3 (d), the plurality of terminal portions 21c of the hoop, the common connection portion of which has been cut at A-A, are formed at predetermined positions of the bracket 21a and formed between the bracket 21a and the plurality of terminal portions 21c. It is simultaneously bent along the taper 21d so that the angle becomes an acute angle. Further, a part of the plurality of terminal portions 21c is mounted in the plurality of grooves 21e so that the plurality of bent terminal portions 21c do not move in the left-right direction. Next, as shown in FIG. 3 (e), the plurality of bent terminal portions 21c and the plurality of external lead-out terminal portions 21b are cut at BB so as to be independent and separated, and then at CC If it cuts, connector 21 as shown in Drawing 3 (f) will be completed. Here, when the cutting is first performed at BB, each of the plurality of terminal portions 21c is independent, so that the bending depth is likely to vary during bending . Therefore, in Embodiment 1 of this invention, after cutting | disconnecting by AA, a bending process is given and it cut | disconnects by BB. Further, when cutting is performed at BB, the plurality of terminal portions 21c are independent, so that the adjacent terminals are easily short-circuited . Therefore, in the first embodiment of the present invention, a part of the plurality of terminal portions 21c is attached to the plurality of grooves 21e to restrict the movement of the terminals.
[0029]
On the other hand, after depositing a plurality of electrode portions and a thin film layer made of NiFe film or NiCo film on a substrate made of glass or the like and forming a predetermined magnetoresistive element pattern by photolithography or etching method, a protective film the magnetoresistive element 12 composed of the vapor deposition, or printing to, along a guide 11d for positioning the holder 11 which is formed by resin molding, attached through a UV resin or a thermosetting resin to the magnetoresistive element mounting portion 11a .
[0030]
Next, the connector bracket is inserted into the connector insertion portion of the holder to which the magnetoresistive element is attached. At this time, it is desirable to insert the bracket until the shape obtained by bending the plurality of terminal portions of the connector is approximately 90 degrees, and the stopper for restricting the insertion of the connector is in such a position. By forming at the time of molding, the plurality of terminal portions are bent to about 90 degrees while being pressed against the plurality of electrode portions of the magnetoresistive element. As a result, the plurality of terminal portions are composed of the plurality of electrodes of the magnetoresistive element. The parts are pressed and electrically connected. In order to prevent the connector bracket from coming out of the holder, the bracket has a locking portion, and the holder insertion portion has a locking portion in the connector insertion direction, compared to a slope in the connector insertion direction. This angle is formed at the time of molding, and the locking portion and the locked portion are caught and prevented from being pulled out. As described above, the holder and the connector are completely fixed and have an integrated structure.
[0031]
Finally, because of the stable electrical connection, although soldering the plurality of electrodes of the plurality of terminals and the magnetoresistive element of the connector if necessary, in the first embodiment of the present invention, without the addition of external stress In addition, it can be easily soldered with a soldering iron or reflow soldering. In addition, since the plurality of terminal portions and the plurality of electrode portions are in contact with each other from the beginning, the plurality of terminal portions are not separated from the plurality of electrode portions due to thermal stress or the like.
[0032]
(Embodiment 2)
Hereinafter, a magnetic sensor according to Embodiment 2 of the present invention will be described with reference to the drawings.
[0033]
FIG. 4A is a perspective view of a magnetic sensor according to Embodiment 2 of the present invention, and FIG. 4B is an exploded perspective view of the magnetic sensor .
[0034]
The difference between the second embodiment of the present invention and the first embodiment of the present invention is that the convex portion 31 a and the locked portion 31 b are formed on the side surface of the holder 31, and the connector 31 has the holder 31. A concave portion 41a and a locking portion 41b having a shape and size matching the convex portion 31a are formed. With this configuration, if the concave portion 41a of the connector is inserted and fixed to the convex portion 31a of the holder to which the magnetoresistive element 32 is attached, the same configuration as that of the first embodiment of the present invention described above can be obtained. When the rotary encoder is installed at a low position according to the configuration of the second embodiment of the present invention, the pattern of the magnetoresistive element facing the rotary encoder can be arranged at the low position, which is an effective configuration.
[0035]
(Embodiment 3)
Hereinafter, a magnetic sensor according to Embodiment 3 of the present invention will be described with reference to the drawings.
[0036]
FIG. 5A is a perspective view of a magnetic sensor according to Embodiment 3 of the present invention, and FIG. 5B is an exploded perspective view of the magnetic sensor .
[0037]
Figure 5 (a) (b) to Oite, 51 in the holder, this holder 51, the mounting of the support portion 51a, the holder 51 so 51b is pattern-formed surface which is parallel to the plane of the magnetoresistive element 52 It is formed above and below the part. With this configuration, if the connector 61 is inserted and fixed to the connector insertion portion 51c of the holder 51 to which the magnetoresistive element 52 is attached , the same effects as those of the first and second embodiments of the present invention described above can be obtained.
[0038]
【The invention's effect】
As described above, the present invention inserts a connector so that the plurality of electrode portions of the magnetoresistive element and the plurality of terminal portions of the connector are electrically connected to the connector insertion portion of the holder to which the magnetoresistive element is previously attached. By doing so, it is possible to obtain sufficient contact between the plurality of electrode portions of the magnetoresistive element and the plurality of terminal portions of the connector without requiring much bending accuracy of the plurality of terminal portions of the connector. Therefore, it is possible to provide a method for manufacturing a magnetic sensor that can be easily soldered.
[0039]
In addition, since the plurality of terminal portions and the plurality of electrode portions are in contact with each other from the beginning, it is possible to provide a method for manufacturing a magnetic sensor in which the plurality of terminal portions are unlikely to be separated from the plurality of electrode portions due to thermal stress or the like.
[Brief description of the drawings]
1A is a perspective view of a magnetic sensor according to a first embodiment of the present invention. FIG. 1B is an exploded perspective view of the magnetic sensor . FIG. 2 is a manufacturing process diagram of the magnetic sensor . FIG. 4A is a perspective view of a magnetic sensor according to Embodiment 2 of the present invention. FIG. 5B is an exploded perspective view of the magnetic sensor . FIG. FIG. 6B is an exploded perspective view of the magnetic sensor . FIG. 6A is a perspective view of the conventional magnetic sensor. FIG. 7B is an exploded perspective view of the magnetic sensor. Manufacturing process diagram [FIG. 8] Perspective view showing an example of use of the magnetic sensor [Explanation of symbols]
DESCRIPTION OF SYMBOLS 11 Holder 11a Magnetoresistive element attachment part 11b Support base part 11c Connector insertion part 11e Locked part 12 Magnetoresistive element 13b Electrode part 21 Connector 21a Bracket 21b External lead-out terminal part

Claims (1)

複数の外部引出端子部およびそれらにそれぞれ接続された複数の端子部よりなる複数のリードを有し、前記リードの端子部側を共通接続部によりフープ本体に連続させられかつ前記リードの外部引出端子部をフープ本体に連続させたフープの所定箇所にブラケットを樹脂成形により形成する工程と、前記フープの複数の端子部側のリードに対して前記複数の端子部が前記フープ本体から分離されることのないように前記共通接続部を切断した後に前記ブラケットの所定箇所で前記複数の端子部を同時に曲げ加工する工程と、前記曲げ加工された複数の端子部、前記複数の外部引出端子部をそれぞれ独立するように分離する工程を含み構成される前記コネクタをホルダのコネクタ挿入部に挿入するとき、前記ホルダの磁気抵抗素子取付部にあらかじめ取付られた前記複数の電極部を有する前記磁気抵抗素子の前記電極部と前記コネクタの複数の端子部とが電気的に接続される磁気センサの製造方法。  A plurality of leads each including a plurality of external lead terminal portions and a plurality of terminal portions respectively connected to the external lead terminal portions, the terminal portion side of the leads being connected to the hoop body by a common connection portion, and the external lead terminals of the leads A step of forming a bracket by resin molding at a predetermined position of the hoop in which the portion is connected to the hoop main body, and the plurality of terminal portions are separated from the hoop main body with respect to leads on the side of the plurality of terminal portions of the hoop. Bending the plurality of terminal portions at a predetermined position of the bracket after cutting the common connection portion so as not to have a plurality of the bent terminal portions and the plurality of external lead terminal portions, respectively. When the connector including the step of separating it independently is inserted into the connector insertion portion of the holder, the magnetic resistance element mounting portion of the holder The manufacturing method of a magnetic sensor and the electrode portions of the magnetoresistive element and a plurality of terminal portions of the connector is electrically connected with the plurality of electrode portions dimethyl was attached.
JP05456697A 1997-03-10 1997-03-10 Manufacturing method of magnetic sensor Expired - Fee Related JP3941148B2 (en)

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JP5104845B2 (en) * 2009-11-16 2012-12-19 パナソニック株式会社 Rotation sensor
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