JP2007101204A - Rotation detecting sensor - Google Patents

Rotation detecting sensor Download PDF

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JP2007101204A
JP2007101204A JP2005287539A JP2005287539A JP2007101204A JP 2007101204 A JP2007101204 A JP 2007101204A JP 2005287539 A JP2005287539 A JP 2005287539A JP 2005287539 A JP2005287539 A JP 2005287539A JP 2007101204 A JP2007101204 A JP 2007101204A
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holder
rotation detection
lead piece
claw
lead
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JP4781073B2 (en
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Tadashi Hattori
服部  正
Takashi Ito
孝 伊藤
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Sumiden Electronics Ltd
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Sumiden Electronics Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To prevent drop of a detecting part (a) from a holder 20. <P>SOLUTION: In this rotation detecting sensor P, a hall IC 11 for detecting magnetic field fluctuation by rotation and converting it into an electric signal is mounted to a holder 20, and an output cable 6 is pulled out of the hall IC via a lead stripe 12 of the hall IC. A recessed part 14 engaging with the detecting part (a) formed of the hall IC and the lead stripe is formed in the holder 20, and a pawl 15 locked with the lead stripe 12 is disposed in the recessed part. Projections 16 are disposed on both sides of the inner surface of the recessed part 14, and a clearance (t) between the projections and the tip 15a of the pawl is set the same as the width T of the lead stripe 12. When the lead stripe 12 is engaged with the inside of the recessed part 14 through the clearance, the lead stripe 12 is located in the center and does not easily jump out of the clearance (t). Therefore, small vibration cannot easily drop the detecting part (a) (hall IC 11 or the like) from the holder 20. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

この発明は、自動車の車輪速センサ、エンジン回転数センサなどの回転検出センサに関するものである。   The present invention relates to a rotation detection sensor such as an automobile wheel speed sensor or an engine speed sensor.

例えば、車輪速センサPは、図9に示すように、その検出部aが樹脂製ホルダー(ボビン)2に取付けられ(設けられ)、有蓋筒状ケーシング1内にその開口1aから検出部aを実装したホルダー2を挿入し、その検出部aからのリード片12に接続されホルダー基部端面から導出された中継端子5に出力線6を接続し、ケーシング開口部1aとホルダー露出部の全周を両者に亘り前記中継端子5及び出力線6の一部を埋設して樹脂被覆4した構成である(特許文献1参照)。
特開2002−257840号公報
For example, as shown in FIG. 9, the wheel speed sensor P has its detection part a attached (provided) to a resin holder (bobbin) 2, and the detection part a is inserted into the covered cylindrical casing 1 from its opening 1 a. The mounted holder 2 is inserted, the output line 6 is connected to the relay terminal 5 connected to the lead piece 12 from the detection part a and led out from the end face of the holder base, and the entire circumference of the casing opening 1a and the holder exposure part is connected. A part of the relay terminal 5 and the output line 6 is embedded and the resin coating 4 is formed over both (see Patent Document 1).
JP 2002-257840 A

上記検出部aには、図10に示すように、磁界変動を検出するホールIC等の回転検出素子11から平行にリード片12を導出し、その両リード片12、12間にコンデンサ等の電子部品13を設けたものがある。   As shown in FIG. 10, a lead piece 12 is led out in parallel to a rotation detecting element 11 such as a Hall IC that detects magnetic field fluctuations, and an electron such as a capacitor is provided between the two lead pieces 12 and 12. Some are provided with a component 13.

この検出部aのリード片12は、そのホルダー2にインサートした中継端子5に抵抗溶接等によるスポット溶接により接続される。このとき、ホールIC11はホルダー2の孔2cに嵌められ、両リード片12、12間にホルダーの突起2dが嵌って、検出部aがホルダー2内に位置決めされている。ホルダー2には、合成樹脂製の蓋7が嵌め込まれる。   The lead piece 12 of the detection part a is connected to the relay terminal 5 inserted in the holder 2 by spot welding such as resistance welding. At this time, the Hall IC 11 is fitted in the hole 2 c of the holder 2, and the protrusion 2 d of the holder is fitted between the lead pieces 12, 12, so that the detection part a is positioned in the holder 2. A synthetic resin lid 7 is fitted into the holder 2.

この車輪速センサPは、図9に示すように、回転する被検出体Bに対向して設けられ、被検出体Bの回転による磁界変動を検出部aで検出して電気信号に変換し、その信号は、中継端子5、出力線6を介して外部の制御機器に伝えられる。被検出体Bには、周縁部に歯車状の歯を設けた強磁性体パルサーリングや、周縁部表面にS極とN極が周方向に交互に連続して現れるように着磁された磁石パルサーリングが使用される。この例では、磁石3をホルダー2に設けているため、強磁性体パルサーリングを採用する。   As shown in FIG. 9, the wheel speed sensor P is provided so as to face the rotating detection object B, detects a magnetic field variation due to rotation of the detection object B by the detection unit a, and converts it into an electrical signal. The signal is transmitted to an external control device via the relay terminal 5 and the output line 6. The detected body B has a ferromagnetic pulsar ring provided with gear-like teeth at the peripheral edge, or a magnet magnetized so that S and N poles appear alternately and continuously on the peripheral surface. Pulsar ring is used. In this example, since the magnet 3 is provided in the holder 2, a ferromagnetic pulsar ring is employed.

この車輪速センサPにおいて、回転検出素子11にホルダー2への嵌合等により外力ストレスが加わっていると、出力・検出特性に悪影響が出る。このため、回転検出素子11は、ホルダー2に取付けた際の外力ストレスを無くすため、ホルダー2の孔2cに僅かな隙間をもって嵌められて脱落し易い状態であり、中継端子5のリード片12への接続等によって、リード片12をホルダー2に固定することにより、検出部aをホルダー2に固定している。   In this wheel speed sensor P, if external force stress is applied to the rotation detecting element 11 by fitting to the holder 2, the output / detection characteristics are adversely affected. For this reason, the rotation detecting element 11 is in a state in which the rotation detecting element 11 is easily fitted off into the hole 2c of the holder 2 with a slight gap in order to eliminate the external force stress when attached to the holder 2, and to the lead piece 12 of the relay terminal 5. The detection part a is fixed to the holder 2 by fixing the lead piece 12 to the holder 2 by connection or the like.

一方、この車輪速センサPの製造において、図11に示すように、ホルダー2に検出部a(リード片12付き回転検出素子11)を嵌めた状態(蓋7を嵌めていない状態)で、パレットAにセットし、所要の工程に移動させる場合が多い。このとき、リード片12がホルダー2に固定される前においては、回転検出素子11は脱落し易い状態で、また、対のリード片12もその間に突起2dが嵌ってはいるが、自由に動ける状態であるため、その移動によって、各検出部a付きのホルダー2は、少なからず振動を受け、その振動により、検出部aは、図示矢印のように、ホルダー2から脱落し易く、脱落すれば、後工程の作業ができないこととなる。   On the other hand, in the manufacture of the wheel speed sensor P, as shown in FIG. 11, the pallet is in a state in which the detection part a (the rotation detection element 11 with the lead piece 12) is fitted in the holder 2 (the lid 7 is not fitted). It is often set to A and moved to a required process. At this time, before the lead piece 12 is fixed to the holder 2, the rotation detecting element 11 is in a state of being easily dropped, and the pair of lead pieces 12 are freely movable although the protrusions 2 d are fitted therebetween. Because of the state, the holder 2 with each detection unit a receives a lot of vibrations due to the movement, and the detection unit a easily falls off the holder 2 as shown by the arrow due to the vibrations. Therefore, the post-process cannot be performed.

この発明は、リード片を中継端子の接続等によって固定する前においても、ホルダー2から検出部aが振動によって、脱落しないようにすることを課題とする。   An object of the present invention is to prevent the detection portion a from dropping off from the holder 2 due to vibration even before the lead piece is fixed by connection of a relay terminal or the like.

上記課題を達成するために、この発明は、ホルダーに、リード片に係止して検出部の脱落を防止する爪を設けることとしたのである。
このようにすれば、爪によって、検出部の脱落が防止されるため、例えば、パレットAによる移動時(搬送時)に、ホルダー2から検出部aが脱落する恐れはない。
In order to achieve the above object, according to the present invention, the holder is provided with a claw that is locked to the lead piece to prevent the detection portion from falling off.
In this case, the detection unit is prevented from falling off by the claw. For example, the detection unit a is not dropped from the holder 2 during the movement by the pallet A (during conveyance).

この発明によれば、ホルダーからの検出部の脱落が防止されるため、回転検出センサの製造において、その脱落による作業効率の低下を防止できる。   According to this invention, since the detection part is prevented from falling off from the holder, it is possible to prevent a decrease in work efficiency due to the drop-off in manufacturing the rotation detection sensor.

この発明の実施形態としては、被検出体の回転による磁界変動を検出し電気信号に変換する回転検出素子をホルダーに取付け、前記回転検出素子からその回転検出素子のリード片を介して出力ケーブルを引き出した回転検出センサにおいて、前記ホルダーに回転検出素子及びリード片の嵌まる凹部が形成され、その凹部内に、リード片の凹部の開口側表面に係止して回転検出素子の前記凹部内からの離脱を防止する爪を設けた構成を採用することができる。   As an embodiment of the present invention, a rotation detection element that detects a magnetic field variation due to rotation of a detected object and converts it into an electrical signal is attached to a holder, and an output cable is connected from the rotation detection element through a lead piece of the rotation detection element. In the rotation detection sensor pulled out, a recess is formed in the holder to which the rotation detection element and the lead piece are fitted, and the recess is engaged with the opening side surface of the recess of the lead piece from within the recess of the rotation detection element. The structure which provided the nail | claw which prevents detachment | leave of can be employ | adopted.

この構成において、上記リード片が対のものであれば、その対のリード端子の間に鉤状の上記爪を設けて、その爪を一方のリード片に係止させて、その係止によって、検出部の脱落を防止することができる。このとき、鉤状を両側に形成して、爪が両リード片に係止するようにすることもできる(図6(a)参照)。   In this configuration, if the lead piece is a pair, the hook-like claw is provided between the pair of lead terminals, and the claw is locked to one lead piece. It is possible to prevent the detection unit from falling off. At this time, hooks can be formed on both sides so that the claws are locked to both lead pieces (see FIG. 6A).

さらに、上記爪の先端が向く側の上記凹部の内面に突起を設け、その突起と前記爪の先端との間隙を上記リード片の幅と同じとする構成とすることもできる。
この構成では、爪の先端をリード片が潜るようにそのリード片を突起と前記爪の先端との間隙に入れることにより(図4参照)、その突起と爪によってリード片の横方向の移動を阻止し、凹部の開放方向へのリード片の移動は爪によって阻止する。これによって、リード片のホルダーからの脱落が防止される。また、爪と突起によって、回転検出素子が位置決めされるため、リード片と中継端子などとの接続特性も安定するとともに、その接続作業の自動化も容易となる。
なお、ここでいう「突起と爪の先端との間隙がリード片の幅と同じ」とは、物理的な同一ではなく、上記リード片のホルダーからの脱落を防止する作用を発揮する限りにおける幅のある同一を言う。
Further, a projection may be provided on the inner surface of the concave portion on the side facing the tip of the claw, and the gap between the projection and the tip of the claw may be the same as the width of the lead piece.
In this configuration, by inserting the lead piece into the gap between the projection and the tip of the claw so that the lead piece can dive at the tip of the claw (see FIG. 4), the protrusion and the claw can move the lead piece in the lateral direction. The movement of the lead piece in the opening direction of the recess is blocked by the claw. This prevents the lead piece from falling off the holder. In addition, since the rotation detecting element is positioned by the claw and the protrusion, the connection characteristic between the lead piece and the relay terminal is stabilized, and the connection work is easily automated.
Here, “the gap between the protrusion and the tip of the claw is the same as the width of the lead piece” is not physically the same, and is a width as long as it exhibits the action of preventing the lead piece from falling off the holder. Say the same.

一実施例を図1乃至図4に示し、この実施例の車輪速センサPは、図9、図10に示した車輪速センサPと同様に、検出部aを、磁界変動を検出するホールIC11から平行にリード片12を導出し、その両リード片12、12間にコンデンサ等の電子部品13を設けたものであり、上述と同一符号は同一物を示す。   1 to FIG. 4, the wheel speed sensor P of this embodiment is similar to the wheel speed sensor P shown in FIG. 9 and FIG. Lead piece 12 is led out in parallel, and an electronic component 13 such as a capacitor is provided between the two lead pieces 12, 12.

樹脂成型品のホルダー20は、図2、図3に示すように、対の中継端子5をインサート樹脂成形したものであり、その前部にホールIC11の嵌合溝14aとリード片12の嵌合溝14bからなる凹部14が形成されている。そのホールIC用嵌合溝14aは、ホールIC11に嵌合によるストレスが生じないように、僅かな間隙をもってホールIC11が嵌る。   As shown in FIGS. 2 and 3, the resin molded product holder 20 is formed by insert resin molding the pair of relay terminals 5, and the fitting groove 14 a of the Hall IC 11 and the lead piece 12 are fitted to the front part thereof. A recess 14 formed of a groove 14b is formed. The Hall IC fitting groove 14a fits the Hall IC 11 with a slight gap so that stress due to fitting does not occur in the Hall IC 11.

凹部14のリード片用嵌合溝14b内面の中程には、突起状の爪15が設けられ、その爪15の両側の嵌合溝14b側面に突起16がそれぞれ設けられている。その爪15は鉤状をしており、その先端のフック部15aがリード片12の表面に係止する。   A protrusion-like claw 15 is provided in the middle of the inner surface of the lead piece fitting groove 14 b of the recess 14, and protrusions 16 are provided on the side surfaces of the fitting groove 14 b on both sides of the claw 15. The claw 15 has a hook shape, and the hook portion 15 a at the tip is locked to the surface of the lead piece 12.

その突起16と前記爪15の先端フック部15aとの間隙t(図4参照)はリード片12の幅T(図2参照)と同じに設定されており、図4の1点鎖線状態のリード片12を、同図2点鎖線のようにその間隙tを通って、同図実線のように嵌合溝14b内に嵌めると、そのリード片12は中央に位置して、容易にその間隙tから跳びでない。このため、図3の状態で、図11に示したように、パレットAにセットして移動させても、検出部a(ホールIC11など)がホルダー20から簡単には脱落しない。   A gap t (see FIG. 4) between the projection 16 and the tip hook portion 15a of the claw 15 is set to be the same as the width T (see FIG. 2) of the lead piece 12, and the lead in the one-dot chain line state of FIG. When the piece 12 passes through the gap t as shown by a two-dot chain line in FIG. 2 and fits in the fitting groove 14b as shown by the solid line in FIG. 2, the lead piece 12 is positioned at the center, and the gap t can be easily set. Not jump from. For this reason, in the state of FIG. 3, as shown in FIG. 11, the detection unit a (Hall IC 11 or the like) does not easily fall off the holder 20 even if it is set on the pallet A and moved.

この検出部a付きホルダー20は、パレットA等にセットされて各工程に移送され、中継端子5とリード片12がスポット溶接等によって接続され、さらに、金属製円筒形ケーシング1に挿入されて、その検出部aがケーシング1内に実装されるとともに、そのホルダー20の基部をケーシング開口部1aに嵌合し、中継端子5をホルダー基部端面からの導出端に出力線6に接続した後、ケーシング1に取付け金具10を嵌め、ケーシング開口部1aとホルダー露出部20aの全周を両者に亘り前記中継端子5及び出力線6の一部を埋設して樹脂被覆4して車輪検センサPを得る。   The holder 20 with the detection part a is set on the pallet A or the like and transferred to each process, the relay terminal 5 and the lead piece 12 are connected by spot welding or the like, and further inserted into the metal cylindrical casing 1, The detection part a is mounted in the casing 1, the base part of the holder 20 is fitted into the casing opening part 1 a, and the relay terminal 5 is connected to the output line 6 from the holder base part end face to the output line 6. 1 is fitted with a fitting 10, and the relay terminal 5 and a part of the output line 6 are embedded over the entire circumference of the casing opening 1 a and the holder exposed portion 20 a to obtain a wheel inspection sensor P. .

上記爪15の態様としては、上記振動等によって検出部aが脱落しない限りにおいて任意であり、例えば、図5(a)に示すように、嵌合溝14b(凹部14)の側壁に内側に向く爪とし、同図鎖線から実線のように、リード片12を傾けて嵌合溝14bに入れるようにすることもできる。このとき、同図(b)に示すように、両側に爪15を設けることもできる。
また、図6に示すように、嵌合溝14bの中程に設けた爪15の両側にフック部15aを設けたものとすることができる。この場合、同図(b)に示すように、そのフック部15aを潜るようにリード片12を嵌合溝14bに差し込んで嵌めることもできる。
The form of the claw 15 is arbitrary as long as the detection part a does not fall off due to the vibration or the like. For example, as shown in FIG. 5A, the claw 15 faces inward on the side wall of the fitting groove 14b (recess 14). It is also possible to use a claw and tilt the lead piece 12 into the fitting groove 14b as shown by a solid line from the chain line in FIG. At this time, as shown in FIG. 5B, the claws 15 can be provided on both sides.
Moreover, as shown in FIG. 6, the hook part 15a shall be provided in the both sides of the nail | claw 15 provided in the middle of the fitting groove 14b. In this case, as shown in FIG. 5B, the lead piece 12 can be inserted and fitted into the fitting groove 14b so as to go under the hook portion 15a.

ホルダー20への検出部aの取付け態様としては、図7、図8に示すように、リード片12が真っ直ぐなどと、この発明が採用できる限りにおいて任意である。   As shown in FIGS. 7 and 8, the detection part a can be attached to the holder 20 as long as the lead piece 12 is straight as long as the present invention can be adopted.

なお、実施例は、ホルダー20をケーシング1に嵌めて樹脂被覆4したものであったが、ケーシング1を設けずに、ホルダー20全体を直接に樹脂被覆4をした車輪速センサPにおいても、この発明は採用できる。また、実施例は車輪速センサであったが、他の回転検出センサにおいても、この発明を採用し得ることは勿論である。   In the embodiment, the holder 20 is fitted to the casing 1 and is resin-coated 4. However, the wheel speed sensor P in which the entire holder 20 is directly coated with the resin 4 without providing the casing 1 can also be used. The invention can be adopted. In addition, although the embodiment is a wheel speed sensor, it is needless to say that the present invention can be adopted in other rotation detection sensors.

一実施例の要部切断正面図Main part cutting front view of one embodiment 同実施例の要部分解斜視図Main part exploded perspective view of the same embodiment 同実施例の要部斜視図Main part perspective view of the same embodiment 同実施例の作用断面図Working sectional view of the embodiment 他の実施例の作用断面図Operational sectional view of another embodiment 他の実施例の作用断面図Operational sectional view of another embodiment 他の実施例の分解斜視図Exploded perspective view of another embodiment 同実施例の斜視図Perspective view of the same embodiment 従来例の要部切断正面図Cutaway front view of the main part of the conventional example 同従来例の要部分解斜視図Main part exploded perspective view of the conventional example 回転検出センサの製造説明図Manufacturing explanatory diagram of rotation detection sensor

符号の説明Explanation of symbols

1 ケーシング
1a ケーシング開口部
2、20 ホルダー
3 磁石
4 樹脂被覆
5 中継端子
6 出力線(出力ケーブル)
11 ホールIC(回転検出素子)
12 リード片
13 電子部品
14 凹部
14a ホールICの嵌る凹部の嵌合溝
14b リード片の嵌る凹部の嵌合溝
15 爪
15a 爪の先端(フック部)
16 嵌合溝両側の突起
a 検出部
P 回転検出センサ(車輪速センサ)
B 被検出体
DESCRIPTION OF SYMBOLS 1 Casing 1a Casing opening part 2,20 Holder 3 Magnet 4 Resin coating 5 Relay terminal 6 Output line (output cable)
11 Hall IC (rotation detection element)
12 Lead piece 13 Electronic component 14 Recess 14a Recess fitting groove 14b where Hall IC fits Recess fitting groove 15 Claw 15a Claw tip (hook part)
16 Protrusions on both sides of fitting groove a Detecting part P Rotation detection sensor (wheel speed sensor)
B Object to be detected

Claims (3)

被検出体(B)の回転による磁界変動を検出し電気信号に変換する回転検出素子(11)をホルダー(20)に取付け、前記回転検出素子(11)からその回転検出素子(11)のリード片(12)を介して出力ケーブル(6)を引き出した回転検出センサ(P)において、
上記ホルダー(20)に上記回転検出素子(11)及びリード片(12)の嵌まる凹部(14)が形成され、その凹部(14)内に、前記リード片(12)の前記凹部(14)の開口側表面に係止して前記回転検出素子(11)の前記凹部(14)内からの離脱を防止する爪(15)を設けたことを特徴とする回転検出センサ。
A rotation detection element (11) that detects a magnetic field variation due to rotation of the detection object (B) and converts it into an electrical signal is attached to a holder (20), and the rotation detection element (11) leads from the rotation detection element (11). In the rotation detection sensor (P) where the output cable (6) is pulled out through the piece (12),
A recess (14) into which the rotation detecting element (11) and the lead piece (12) are fitted is formed in the holder (20), and the recess (14) of the lead piece (12) is formed in the recess (14). A rotation detection sensor comprising a claw (15) that is locked to the opening-side surface of the rotation detection element and prevents the rotation detection element (11) from being detached from the recess (14).
上記リード片(12)が対のものであって、その対のリード片(12)の間に鉤状の上記爪(15)を設けたことを特徴とする請求項1に記載の回転検出センサ。   The rotation detection sensor according to claim 1, wherein the lead piece (12) is a pair, and the hook-like claw (15) is provided between the pair of lead pieces (12). . 請求項2に記載の回転検出センサ(P)において、上記爪(15)の先端(15a)が向く側の上記凹部(14)の内面に突起(16)を設け、その突起(16)と前記爪(15)の先端(15a)との間隙tを上記リード片(12)の幅Tと同じにしたことを特徴とする回転検出センサ。   The rotation detection sensor (P) according to claim 2, wherein a projection (16) is provided on the inner surface of the recess (14) on the side facing the tip (15a) of the claw (15), and the projection (16) and the A rotation detection sensor characterized in that a gap t between the tip (15a) of the nail (15) and the width T of the lead piece (12) is the same.
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