JP2006338905A - Proximity sensor and detection coil therefor - Google Patents

Proximity sensor and detection coil therefor Download PDF

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JP2006338905A
JP2006338905A JP2005159175A JP2005159175A JP2006338905A JP 2006338905 A JP2006338905 A JP 2006338905A JP 2005159175 A JP2005159175 A JP 2005159175A JP 2005159175 A JP2005159175 A JP 2005159175A JP 2006338905 A JP2006338905 A JP 2006338905A
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coil
coil wire
proximity sensor
detection
wire
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Hiroya Nakao
浩也 中尾
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Panasonic Industrial Devices SUNX Co Ltd
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Sunx Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a detection coil for proximity sensor, or the like, in which a coil wire can be wound in alignment on a cylinder even at the starting part of the coil wire. <P>SOLUTION: A bobbin 40 has flanges 44, 45 projecting into the outer radial direction at both ends 41A, 41B of a cylinder 41. Notches 46B, 47B having a semi-circular cross section is formed in the flange 45 which is one of the both flanges 44, 45 and is positioned at the underside. A coil groove 42, into which a coil wire 55 is inserted, is formed in the outer periphery surface of the cylinder 41, where the lower end of the coil groove 42 is formed to reach only down to a position at a specified distance away from the flange 45. In other words, a flat portion 48 is formed around the whole circumference of an axis end 41B at the underside of the cylinder 41, and the coil groove 42 is formed in accordance with the flat position 48. Therefore, since the position of the coil groove 42 is formed in expectation of the swelling in a flection (D portion) of the coil wire 55, the coil wire 55 can be wound in alignment even at the starting part of the coil wire 55. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、近接センサ用検出コイル、並びにそれを使用した近接センサに関する。   The present invention relates to a detection coil for a proximity sensor and a proximity sensor using the same.

従来より、検出コイルから発生する磁力の変化に基づいて検出を行う近接センサが広く知られている。検出コイルは、円筒状のコイルボビンにコイル線を繰り返し巻きつけてなるが、コイル線を整列巻きするべく、コイルボビンの胴部にコイル線が嵌合される溝部を形成したものがある（特許文献１）。
尚、コイル線を整列巻きするのは、近接センサの検出精度を高めるためである。すなわち、ボビンに対してコイル線の巻き斑があると、検出コイルに生ずる磁界が不均一となる。これにより、部分的に磁界の弱い部分が出来てしまい、場合によっては、検出補償範囲内であっても、検出を行なうことが出来ないといった事態が生じ得る。そのため、コイル線をボビンに整列巻きすることは、近接センサの測定精度を補償する上で、極めて重要な問題といえる。
特開２００１−２６７１５１公報 2. Description of the Related Art Conventionally, proximity sensors that perform detection based on a change in magnetic force generated from a detection coil are widely known. The detection coil is formed by repeatedly winding a coil wire around a cylindrical coil bobbin. In order to wind the coil wire in an aligned manner, there is one in which a groove portion in which the coil wire is fitted is formed in the body portion of the coil bobbin (Patent Document 1). ).
The reason why the coil wires are wound in order is to increase the detection accuracy of the proximity sensor. That is, if there are coiling spots on the bobbin, the magnetic field generated in the detection coil becomes non-uniform. As a result, a portion having a weak magnetic field is created, and in some cases, even within the detection compensation range, it may not be possible to perform detection. Therefore, it can be said that aligning and winding the coil wire around the bobbin is a very important problem in compensating the measurement accuracy of the proximity sensor.
JP 2001-267151 A

胴部に溝が形成されていれば、コイル線が溝に沿って巻かれるから、溝が形成されていない場合に比べて、コイル線を整列させることが可能となる。
ところで、ボビンに対するコイル線の巻き付けは、予め、コイル線の始端部分を固定しておき、その状態から例えば、治具等によりボビンを回動させることで行なわれるが、通常では、コイル線の始端が固定される端子はフランジ部４の外側に設けられているため、図１３に示すように、ボビン１に対するコイル線の巻き付けは、先端部を屈曲させた状態で開始される。
しかし、コイル線は直角には曲がらないから、コイル線を挿通させる切り欠き部５の周辺で、コイル線は外側に膨らんでしまう（同図に示すＦ寸法部分）。係る状態で、コイル線を巻きつけてゆくと、外側に膨らんだ部分に２周目のコイル線が被ってしまい、コイル線を整列巻きすることが出来ない、という問題があった。
本発明は上記のような事情に基づいて完成されたものであって、胴部に対するコイル線の巻き始め部分においてもコイル線を整列巻きさせることが可能な近接センサ用検出コイル並びに、それを用いた近接センサを提供することを目的とする。 If the groove is formed in the body portion, the coil wire is wound along the groove. Therefore, the coil wire can be aligned as compared with the case where the groove is not formed.
By the way, the coil wire is wound around the bobbin by fixing the coil wire starting end portion in advance and rotating the bobbin with a jig or the like from that state. Since the terminal to which is fixed is provided outside the flange portion 4, as shown in FIG. 13, winding of the coil wire around the bobbin 1 is started with the tip portion bent.
However, since the coil wire does not bend at a right angle, the coil wire bulges outward around the notch portion 5 through which the coil wire is inserted (F dimension portion shown in the figure). When the coil wire is wound in such a state, there is a problem that the coil wire of the second turn is covered on the portion bulging outward, and the coil wire cannot be wound in an aligned manner.
The present invention has been completed based on the above circumstances, and a proximity sensor detection coil capable of aligning and winding a coil wire at a winding start portion of the coil wire with respect to a body portion, and using the same. An object of the present invention is to provide a proximity sensor.

上記の目的を達成するための手段として、請求項１の発明は、磁力の変化に基づいて検出を行なう近接センサに使用される検出コイルであって、コイル線が巻回される胴部と、前記胴部の両軸端部に設けられるフランジ部と、前記フランジ部のうちいずれか一方に設けられるコイル線挿通用の切り欠き部と、からなるコイルスプールに、前記切り欠き部を挿通させつつ屈曲させて先端部を前記フランジ部の外側に引き出した状態から当該コイル線を繰り返し巻きつけてなるものにおいて、前記胴部に対するコイル線の巻回開始位置が前記切り欠き部が設けられた側の軸端部から所定距離離れて開始されるように前記コイル線を位置規制する位置規制部を備えたところに特徴を有する。   As means for achieving the above object, the invention of claim 1 is a detection coil used in a proximity sensor that performs detection based on a change in magnetic force, and a trunk portion around which a coil wire is wound; While inserting the notch portion into a coil spool comprising a flange portion provided at both shaft end portions of the trunk portion and a notch portion for inserting a coil wire provided in one of the flange portions, In the case where the coil wire is repeatedly wound from the state where the distal end portion is pulled out to the outside of the flange portion, the winding start position of the coil wire with respect to the body portion is on the side where the notch portion is provided. It is characterized in that a position restricting portion for restricting the position of the coil wire is provided so as to start at a predetermined distance from the shaft end portion.

請求項２の発明は、請求項１に記載のものにおいて、前記胴部の外周面に前記コイル線が嵌合されるコイル溝が形成されるとともに、このコイル溝が前記胴部における前記切り欠き部が設けられた側の軸端部から所定距離離れた位置から開始されて前記位置規制部を構成しているところに特徴を有する。   According to a second aspect of the present invention, in the first aspect of the present invention, a coil groove into which the coil wire is fitted is formed on the outer peripheral surface of the body portion, and the coil groove is formed in the notch in the body portion. It is characterized in that the position restricting portion is configured starting from a position separated from a shaft end portion on the side where the portion is provided by a predetermined distance.

請求項３の発明は、請求項１又は請求項２に記載のものにおいて、前記コイル線は、複数のコイル素線をより合わせたより線を外被により被覆してなるところに特徴を有する。   A third aspect of the invention is characterized in that, in the first or second aspect of the invention, the coil wire is formed by covering a stranded wire obtained by combining a plurality of coil strands with a jacket.

請求項４の発明は、請求項１ないし請求項３のいずれかに記載の近接センサ用検出コイルと、前記近接センサ用検出コイルを収容する磁性体からなるコアとを有し、前記近接センサ用検出コイルから発生する磁力の変化に基づいて検出を行うところに特徴を有する。   A fourth aspect of the present invention includes the proximity sensor detection coil according to any one of the first to third aspects and a core made of a magnetic body that houses the proximity sensor detection coil. It is characterized in that detection is performed based on a change in magnetic force generated from the detection coil.

＜請求項１、請求項３並びに請求項４の発明＞
請求項１の発明によれば、切り欠き部が設けられた側の軸端部から所定距離離れた位置から巻回が開始されるようにコイル線は位置規制部によって位置規制される。このように、屈曲部分の膨らみが予め見込まれているから、巻き始め部分を含むコイル線の全体を胴部に対して整列させた状態で巻くことが出来る。そして、整列巻きされた検出コイルを使用した近接センサであれば、コイルによって作られる磁界が均一になるため、センサの検出精度が高まる（請求項４の発明）。
また、コイル線が、複数のコイル素線をより合わせたより線を外被により被覆してなるものの場合には、単線に比べて曲がり難く屈曲部分の膨らみが特に大きくなる。従って、通常であれば、整列巻きが困難となるが、本発明であれば、係る場合であっても整列巻きが可能となる（請求項３の発明）。 <Invention of Claims 1, 3 and 4>
According to the first aspect of the present invention, the position of the coil wire is restricted by the position restricting portion so that winding is started from a position separated from the shaft end on the side where the notch is provided by a predetermined distance. Thus, since the bulge of the bent portion is expected in advance, the entire coil wire including the winding start portion can be wound in a state aligned with the body portion. And if it is a proximity sensor using the detection coil wound in alignment, since the magnetic field produced with a coil will become uniform, the detection accuracy of a sensor will increase (invention of Claim 4).
In addition, when the coil wire is formed by covering a stranded wire obtained by further combining a plurality of coil strands with a jacket, it is difficult to bend as compared with a single wire, and the bulge of the bent portion is particularly large. Therefore, if it is normal, aligned winding becomes difficult. However, according to the present invention, aligned winding is possible even in such a case (invention of claim 3).

＜請求項２の発明＞
請求項２の発明によれば、コイル溝によって位置規制部が兼用されているから、位置規制部をそれ専用に設ける必要がなく、コイルスプールの形状がシンプルになる。 <Invention of Claim 2>
According to the invention of claim 2, since the position restricting portion is also used by the coil groove, it is not necessary to provide the position restricting portion exclusively, and the shape of the coil spool is simplified.

本発明の一実施形態を図１ないし図９によって説明する。
１．近接センサの全体構成
図１は、近接センサの側断面図である。同図に示すように、近接センサは全体として長手状に構成され、ケーシング１１の内部に次述する検出部Ｐを有する平板状の回路基板Ｓを収容させている。 An embodiment of the present invention will be described with reference to FIGS.
1. 1 is a side sectional view of a proximity sensor. As shown in the figure, the proximity sensor as a whole is formed in a longitudinal shape, and a flat circuit board S having a detection portion P described below is accommodated inside the casing 11.

２．検出部
検出部Ｐは回路基板Ｓの長手方向の先端（図１で紙面左方向）寄りの位置にあって、樹脂材料などからなるボビン（本発明のコイルスプールに相当）４０にコイル線を巻きつけた検出コイルＬと、コア６０とから構成される。 2. Detection unit The detection unit P is located near the longitudinal tip of the circuit board S (left side in FIG. 1), and a coil wire is wound around a bobbin 40 (corresponding to the coil spool of the present invention) made of a resin material or the like. The detection coil L is attached to the core 60.

ボビン４０は、図２のように、円筒状をなす胴部４１の両軸端部４１Ａ、４１Ｂに径方向外向きに突出する円盤状のフランジ部４４，４５を備えてなる。両フランジ部４４、４５のうち、図２における下側に位置するフランジ部４５の下面には、下向きに突出するように一対の座部４６、４７が設けられている。これら両座部４６、４７の中心部分には軸孔４６Ａ、４７Ａが形成されるとともに、外側面には断面半円状の切り欠き部４６Ｂ、４７Ｂがそれぞれ形成されている。両軸孔４６Ａ、４７Ａには端子ピン５１、５２がそれぞれ固定されるようになっている。   As shown in FIG. 2, the bobbin 40 includes disk-shaped flange portions 44 and 45 projecting radially outward at both shaft end portions 41 </ b> A and 41 </ b> B of a cylindrical body portion 41. A pair of seat portions 46 and 47 are provided on the lower surface of the flange portion 45 located on the lower side in FIG. 2 so as to protrude downward. Shaft holes 46A and 47A are formed in the central portions of both seat portions 46 and 47, and cutout portions 46B and 47B having a semicircular cross section are formed on the outer surface. Terminal pins 51 and 52 are fixed to the shaft holes 46A and 47A, respectively.

係るボビン４０に対して、コイル線５５を繰り返し巻きつけることで検出コイルＬが形成される。具体的には、図４に示すように、切り欠き部４６Ｂに沿って水平に始端５５Ａを引き出して、同始端５５Ａを端子ピン５１に固定した状態にセットしておき、その状態から巻きつけ治具Ｒを回動させる。これにより、コイル線格納部７１からコイル線５５が順次引き出されることで、胴部４１にコイル線５５が繰り返し巻かれることとなる。尚、コイル線５５の他端は、他方側の切り欠き部４７Ｂを通して胴部４１側から端子ピン５２側に引き出されて、端子ピン５２に接続される。   The detection coil L is formed by repeatedly winding the coil wire 55 around the bobbin 40. Specifically, as shown in FIG. 4, the start end 55A is pulled out horizontally along the notch 46B, and the start end 55A is set to be fixed to the terminal pin 51. The tool R is rotated. As a result, the coil wire 55 is sequentially drawn out from the coil wire storage portion 71, whereby the coil wire 55 is repeatedly wound around the trunk portion 41. The other end of the coil wire 55 is pulled out from the body 41 side to the terminal pin 52 side through the notch portion 47B on the other side and connected to the terminal pin 52.

図５に示すように、コア６０は円柱状をなすコイル受け部６１と、このコイル受け部６１を取り囲む外壁部６２と、両部６１、６２を連結する底面壁６４とからなる。コイル受け部６１は、ボビン４０の内周に嵌合可能な大きさに形成されるとともに、外壁部６２はボビン４０のフランジ部４４、４５よりやや大きく形成される。また、底面壁６４における端子ピン５１の対向位置には、それぞれ逃がし孔６６、６７が設けられている。
そのため、ボビン４０の内周にコイル受け部６１を宛がいつつ、ボビン４０をコア６０内に嵌合させると、逃がし孔６６、６７に挿通されて端子ピン５１は底面壁６４から下向きに突出されるとともに、検出コイルＬ全体（端子ピン５１、５２を除く部分）がコア６０内に収容されるようになっている。 As shown in FIG. 5, the core 60 includes a cylindrical coil receiving portion 61, an outer wall portion 62 that surrounds the coil receiving portion 61, and a bottom wall 64 that connects both portions 61 and 62. The coil receiving portion 61 is formed to a size that can be fitted to the inner periphery of the bobbin 40, and the outer wall portion 62 is formed to be slightly larger than the flange portions 44 and 45 of the bobbin 40. Relief holes 66 and 67 are provided at positions facing the terminal pins 51 on the bottom wall 64, respectively.
Therefore, when the bobbin 40 is fitted into the core 60 while the coil receiving portion 61 is addressed to the inner periphery of the bobbin 40, the terminal pin 51 is protruded downward from the bottom wall 64 through the escape holes 66 and 67. In addition, the entire detection coil L (portions excluding the terminal pins 51 and 52) is accommodated in the core 60.

また、検出部Ｐの接続相手となる回路基板Ｓには、端子ピン５１、５２の対向位置にスルーホールが設けられており、端子ピン５１、５２を回路基板Ｓに半田付けすることで、検出コイルＬが回路基板Ｓの導電路に対して電気的に接続されるようになっている。   The circuit board S to which the detection unit P is connected is provided with a through hole at a position opposite to the terminal pins 51 and 52, and the terminal pins 51 and 52 are soldered to the circuit board S for detection. The coil L is electrically connected to the conductive path of the circuit board S.

３.近接センサの電気的構成
図６に示すように、回路基板Ｓには発振回路１０、検波回路２０、比較回路３０などが実装されている。発振回路１０は検出コイルＬと共にＬＣ並列共振回路１１を構成するものである。検波回路２０は発振回路１０から出力される交流電圧を整流するためのものであり、比較回路３０は所定の基準電圧レベルと検波回路２０から出力された電圧レベルとを比較するものである。 3. Electrical Configuration of Proximity Sensor As shown in FIG. 6, an oscillation circuit 10, a detection circuit 20, a comparison circuit 30, and the like are mounted on a circuit board S. The oscillation circuit 10 constitutes an LC parallel resonance circuit 11 together with the detection coil L. The detection circuit 20 is for rectifying the AC voltage output from the oscillation circuit 10, and the comparison circuit 30 is for comparing a predetermined reference voltage level with the voltage level output from the detection circuit 20.

近接センサの検出原理について、簡単に説明すると、ＬＣ並列共振回路１１に対して図示しない電源回路から直流電圧が印加されると、ＬＣ並列共振回路の検出コイルＬとコンデンサＣとの間に電気振動が生じる。   The detection principle of the proximity sensor will be briefly described. When a DC voltage is applied to the LC parallel resonance circuit 11 from a power supply circuit (not shown), an electric vibration is generated between the detection coil L and the capacitor C of the LC parallel resonance circuit. Occurs.

被検出体（金属体）Ｗと検出コイルＬとが離れている場合には、検出コイルＬに生ずる磁束が被検出体Ｗにほとんど鎖交しない。そのため、被検出体Ｗには誘導電流（渦電流）が流れず、同被検出体Ｗでのエネルギー損失がないため、検出コイルＬとコンデンサＣによる電気振動は一定の振幅レベルを保った状態で持続する。
これに対して、検出コイルＬが被検出体Ｗに接近すると、検出コイルＬに渦電流が流れる。これは検出センサ１側から被検出体Ｗ側にエネルギーが引き出されたということであるから、検出センサ１側にエネルギーの損失が生じて、発振振幅のレベルが低下する。このように、発振振幅のレベルを検出することで、被検出体の有無について検出することが出来る。 When the detected body (metal body) W and the detection coil L are separated from each other, the magnetic flux generated in the detection coil L hardly interlinks with the detected body W. Therefore, no induced current (eddy current) flows through the detection target W, and there is no energy loss in the detection target W. Therefore, the electric vibration generated by the detection coil L and the capacitor C is maintained at a constant amplitude level. continue.
On the other hand, when the detection coil L approaches the detection target W, an eddy current flows through the detection coil L. This means that energy has been drawn from the detection sensor 1 side to the detection target W side, so that energy loss occurs on the detection sensor 1 side, and the level of oscillation amplitude decreases. In this way, by detecting the level of the oscillation amplitude, it is possible to detect the presence or absence of the detected object.

さて、係る近接センサでは測定精度の向上が要請されるが、それには、各素子の回路定数の安定が必要不可欠である。特に、このものは、ＬＣ並列共振回路１１による電気振動を利用して検出動作を行なうから、検出コイルＬのインダクタンス並びに、コンデンサのキャパシタンスの値を誤差なくする必要がある。   In such a proximity sensor, improvement in measurement accuracy is required. For this purpose, it is essential to stabilize the circuit constant of each element. In particular, since this performs a detection operation using the electric vibration generated by the LC parallel resonance circuit 11, it is necessary to eliminate the errors in the inductance of the detection coil L and the capacitance of the capacitor.

検出コイルＬは、先にも述べたように、コイル線５５をボビン４０の胴部４１に繰り返し巻いて形成するが、巻き方に斑があるとコイルが作る磁界に歪が生ずるから、巻き数が同じであってもインダクタンスの値が異なったものになってしまう。そこで、胴部４１にコイル線５５を整列巻きするべく、図７に示すように胴部４１の外周面にコイル線５５を嵌合させるコイル溝４２が設けられている。   As described above, the detection coil L is formed by repeatedly winding the coil wire 55 around the body portion 41 of the bobbin 40. However, if the winding is uneven, the magnetic field produced by the coil is distorted. Even if is the same, the inductance value will be different. In order to align and wind the coil wire 55 around the body portion 41, a coil groove 42 for fitting the coil wire 55 is provided on the outer peripheral surface of the body portion 41 as shown in FIG.

このコイル溝４２は径方向内側（図７に示す中心線Ｌｃ側）に切れ込むようなＶ字型をなすととももに、その溝間のピッチ（図７に示すＡ寸法）は、図８、図９に示すように、コイル線５５を胴部４１に巻きつけた際に、隣合うコイル線５５の外周同士が密着するような幅寸法に設定されている。   The coil groove 42 is V-shaped so as to be cut inward in the radial direction (center line Lc side shown in FIG. 7), and the pitch between the grooves (A dimension shown in FIG. 7) is as shown in FIG. As shown in FIG. 9, when the coil wire 55 is wound around the trunk portion 41, the width dimension is set such that the outer circumferences of adjacent coil wires 55 are in close contact with each other.

また、図７に示すように、コイル溝４２の上端はフランジ部４４に達する位置、すなわち胴部４１における上端側の軸端部４１Ａまで達しているのに対して、下端はフランジ部４５から所定距離れた位置までしか形成されていない。換言すれば、胴部４１における下側の軸端部４１Ｂには、その全周に亘って平らな平坦部４８が設けられ、この平坦部４８に続いてコイル溝４２が形成されている。   Further, as shown in FIG. 7, the upper end of the coil groove 42 reaches a position reaching the flange portion 44, that is, the shaft end portion 41 </ b> A on the upper end side of the trunk portion 41, whereas the lower end is predetermined from the flange portion 45. It is formed only up to a distance. In other words, the lower shaft end portion 41 </ b> B of the body portion 41 is provided with a flat portion 48 which is flat over the entire circumference, and the coil groove 42 is formed following the flat portion 48.

コイル溝４２の下端側の溝位置を上記のように設定してあるのは、切り欠き部４６Ｂから胴部４１へとコイル線５５の引き込むための屈曲部分（図８に示すＤ部）の膨らみを見込んだものである。すなわち、コイル線５５は直角には曲がらないから屈曲部分は、同図の上方にやや膨らんでしまうが、平坦部４８の高さ寸法Ｂはコイル線５５の屈曲部分の膨らみの高さ（例えば、図１３に示すＦ寸法）とほぼ同じ高さに設定されていている。
尚、本実施形態のものは、平坦部４８の高さ寸法Ｂをコイル線５５の太さ（直径Ｒ）の約１/２に設定してある。 The groove position on the lower end side of the coil groove 42 is set as described above. The bulge of the bent portion (D portion shown in FIG. 8) for drawing the coil wire 55 from the notch portion 46B to the trunk portion 41 is set. Is expected. That is, since the coil wire 55 does not bend at a right angle, the bent portion slightly bulges upward in the figure, but the height dimension B of the flat portion 48 is the height of the bulge of the bent portion of the coil wire 55 (for example, It is set to substantially the same height as dimension F shown in FIG.
In the present embodiment, the height B of the flat portion 48 is set to about 1/2 of the thickness (diameter R) of the coil wire 55.

そのため、コイル線５５をコイル溝４２に沿わせると、丁度、コイル線５５の屈曲部分（巻き始めの部分）が無理なくコイル溝４２に嵌るようになっている。そのため、巻き始めの部分を含むコイル線５５全体を胴部４１に対して整列させた状態で巻き付けることが出来る。   Therefore, when the coil wire 55 is moved along the coil groove 42, the bent portion (winding start portion) of the coil wire 55 is fit into the coil groove 42 without difficulty. Therefore, the entire coil wire 55 including the winding start portion can be wound in a state of being aligned with the body portion 41.

また、本実施形態のものは、平坦部４８を胴部４１の全周に亘って設けているが、これは、コイル線５５の始端５５Ａを端子ピン５１、５２のいずれの側に固定した状態から巻きつけを行なっても、コイル線５５が胴部４１に整列巻きされるように配慮したものである。   Moreover, although the thing of this embodiment has provided the flat part 48 over the perimeter of the trunk | drum 41, this is the state which fixed the starting end 55A of the coil wire 55 to either side of the terminal pins 51 and 52. The coil wire 55 is considered to be aligned and wound around the body portion 41 even when it is wound around.

＜他の実施形態＞
本発明は上記記述及び図面によって説明した実施形態に限定されるものではなく、例えば次のような実施形態も本発明の技術的範囲に含まれ、さらに、下記以外にも要旨を逸脱しない範囲内で種々変更して実施することができる。 <Other embodiments>
The present invention is not limited to the embodiments described with reference to the above description and drawings. For example, the following embodiments are also included in the technical scope of the present invention, and further, within the scope not departing from the gist of the invention other than the following. Various modifications can be made.

（１）本実施形態では、コイル溝４２を胴部４１の軸端部４１Ｂから所定距離離すことで、コイル線５５の屈曲部分を見込んだが、屈曲部分を見込んだ位置からコイル線５５の巻き始めが開始されるようにコイル線５５を位置規制するものが設けられていればよく、例えば、図１０に示すように、フランジ部４５の上面に突部８０を設けて、コイル線５５を浮かせるようにしてもよい。   (1) In the present embodiment, the coil groove 42 is separated from the shaft end portion 41B of the body portion 41 by a predetermined distance so that the bent portion of the coil wire 55 is expected, but the coil wire 55 starts to be wound from the position where the bent portion is expected. For example, as shown in FIG. 10, a protrusion 80 is provided on the upper surface of the flange portion 45 so that the coil wire 55 is floated. It may be.

（２）本実施形態では、コイル線５５は単線であったが、これに限られるものではなく、図１１に示すように、複数のコイル素線７５をより合わせたより線を外被７６により被覆した線であってもよい。このように、コイル素線７５をより合わせたものは、単線に比べて曲がり難く屈曲部分の膨らみが特に大きくなる。従って、通常であれば、整列巻きが困難となるが、本発明であれば、係る場合であっても整列巻きが可能となる。   (2) In the present embodiment, the coil wire 55 is a single wire. However, the present invention is not limited to this, and as shown in FIG. It may be a line. As described above, the combination of the coil strands 75 is more difficult to bend than the single wire, and the bulge of the bent portion is particularly large. Therefore, normally, aligned winding is difficult, but according to the present invention, aligned winding is possible even in such a case.

（３）本実施形態では、平坦部４８を胴部４１の全周に亘って設けているが、必ずしも全周に設ける必要はない。すなわち、コイル線５５のうちボビン４０に対する巻き始めの部分が軸端から浮いた状態になればよいから、平坦部４８は少なくとも、コイル線５５の巻き始め部分に形成されていればよく、例えば、ボビン４０に対してコイル線５５を斜めに巻く場合には、図１２に示すように、平坦部８１をテーパ形状にしてもよい。尚、同図においては、右側下端のハッチングによって示す部分がボビン４０にするコイル線５５の巻き始めの位置になっている。   (3) In the present embodiment, the flat portion 48 is provided over the entire circumference of the body portion 41, but it is not always necessary to provide the entire circumference. That is, it is only necessary that the winding start portion of the coil wire 55 with respect to the bobbin 40 is lifted from the shaft end. Therefore, the flat portion 48 may be formed at least at the winding start portion of the coil wire 55. When the coil wire 55 is wound obliquely around the bobbin 40, the flat portion 81 may be tapered as shown in FIG. In the figure, the portion indicated by the hatching at the lower right corner is the position at which the coil wire 55 that forms the bobbin 40 starts to be wound.

（４）本実施形態では、近接センサの一例として、いわゆる角筒型のものを例示したが、これに限られるものではなく、いわゆる円筒型のものに適用してもよい。尚、角筒型とは、角筒状をなすケーシング内に、回路基板と検出コイルがＬ字状をなして収容されるものである（図１参照）。一方、円筒型とは、円筒状のケーシング内に、回路基板と検出コイルがケーシングの軸方向に並べて配されたものである（図示せず）。   (4) In the present embodiment, a so-called rectangular tube type is illustrated as an example of the proximity sensor, but the present invention is not limited to this, and may be applied to a so-called cylindrical type. In addition, a square tube type is a circuit board and a detection coil which are accommodated in an L shape in a rectangular tube casing (see FIG. 1). On the other hand, the cylindrical type is a cylindrical casing in which a circuit board and a detection coil are arranged in the axial direction of the casing (not shown).

本発明の一実施形態に係る近接センサの側断面図1 is a side sectional view of a proximity sensor according to an embodiment of the present invention. ボビンの斜視図Bobbin perspective view ボビンの下面図Bottom view of bobbin ボビンにコイル線を巻きつける様子を示す図The figure which shows a mode that a coil wire is wound around a bobbin コアの斜視図Core perspective view 近接センサの電気的構成を示すブロック図Block diagram showing electrical configuration of proximity sensor ボビンの正面図Bobbin front view ボビンにコイル線を巻き始めた状態を示す図The figure which shows the state which started winding the coil wire around the bobbin 検出コイルの断面図Cross section of detection coil 他の実施例を示す図（ボビンの正面図）The figure which shows another Example (front view of a bobbin) コイル線の構造を示す図Diagram showing coil wire structure 平坦部が斜めに形成されている状態を示す図The figure which shows the state in which the flat part is formed diagonally 従来例を示す図Figure showing a conventional example

符号の説明Explanation of symbols

１０…近接センサ
４０…ボビン（コイルスプール）
４１…胴部
４２…コイル溝
４４，４５…フランジ部
４６Ａ、４７Ａ…切り欠き部
５５…コイル線
Ｌ…検出コイル 10 ... Proximity sensor 40 ... Bobbin (coil spool)
41 ... Body 42 ... Coil groove 44, 45 ... Flange 46A, 47A ... Notch 55 ... Coil wire L ... Detection coil

Claims (4)

磁力の変化に基づいて検出を行なう近接センサに使用される検出コイルであって、
コイル線が巻回される胴部と、
前記胴部の両軸端部に設けられるフランジ部と、
前記フランジ部のうちいずれか一方に設けられるコイル線挿通用の切り欠き部と、からなるコイルスプールに、前記切り欠き部を挿通させつつ屈曲させて先端部を前記フランジ部の外側に引き出した状態から当該コイル線を繰り返し巻きつけてなるものにおいて、
前記胴部に対するコイル線の巻回開始位置が前記切り欠き部が設けられた側の軸端部から所定距離離れて開始されるように前記コイル線を位置規制する位置規制部を備えたことを特徴とする近接センサ用検出コイル。 A detection coil used in a proximity sensor that performs detection based on a change in magnetic force,
A body around which a coil wire is wound;
Flange portions provided at both shaft end portions of the body portion;
A coil spool comprising a notch for inserting a coil wire provided in either one of the flanges, and a state in which the notch is bent while being inserted and the tip is pulled out of the flange In what is formed by repeatedly winding the coil wire from
A position restricting portion for restricting the position of the coil wire so that a winding start position of the coil wire with respect to the body portion is started a predetermined distance away from a shaft end portion on the side where the notch portion is provided; A detection coil for a proximity sensor. 前記胴部の外周面に前記コイル線が嵌合されるコイル溝が形成されるとともに、このコイル溝が前記胴部における前記切り欠き部が設けられた側の軸端部から所定距離離れた位置から開始されて前記位置規制部を構成していることを特徴とする請求項１に記載の近接センサ用検出コイル。 A coil groove into which the coil wire is fitted is formed on the outer peripheral surface of the body portion, and the coil groove is located at a predetermined distance from the shaft end portion of the body portion on the side where the notch portion is provided. The proximity sensor detection coil according to claim 1, wherein the position restricting portion is configured by starting from a position. 前記コイル線は、複数のコイル素線をより合わせたより線を外被により被覆してなることを特徴とする請求項１又は請求項２に記載の近接センサ用検出コイル。 3. The proximity sensor detection coil according to claim 1, wherein the coil wire is formed by covering a stranded wire obtained by combining a plurality of coil strands with a jacket. 4. 請求項１ないし請求項３のいずれかに記載の近接センサ用検出コイルと、
前記近接センサ用検出コイルを収容する磁性体からなるコアとを有し、
前記近接センサ用検出コイルから発生する磁力の変化に基づいて検出を行う近接センサ。 The proximity coil detection coil according to any one of claims 1 to 3,
A core made of a magnetic body that houses the proximity sensor detection coil;
A proximity sensor that performs detection based on a change in magnetic force generated from the detection coil for the proximity sensor.
JP2005159175A 2005-05-31 2005-05-31 Proximity sensor and detection coil therefor Pending JP2006338905A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011021288A1 (en) * 2009-08-19 2011-02-24 三菱電機株式会社 Vibration damping device for elevator
JP2015082935A (en) * 2013-10-23 2015-04-27 日本電産サンキョー株式会社 Motor and method for connecting winding to terminal pin in motor

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61196743A (en) * 1985-02-26 1986-08-30 Nippon Denso Co Ltd Coil bobbin for electric machine
JPH037242U (en) * 1989-06-08 1991-01-24
JP2000092768A (en) * 1998-09-16 2000-03-31 Tamagawa Seiki Co Ltd Winding bobbin structure
JP2004030950A (en) * 2002-06-21 2004-01-29 Omron Corp Proximity sensor with improved positioning accuracy for detection coil periphery member

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61196743A (en) * 1985-02-26 1986-08-30 Nippon Denso Co Ltd Coil bobbin for electric machine
JPH037242U (en) * 1989-06-08 1991-01-24
JP2000092768A (en) * 1998-09-16 2000-03-31 Tamagawa Seiki Co Ltd Winding bobbin structure
JP2004030950A (en) * 2002-06-21 2004-01-29 Omron Corp Proximity sensor with improved positioning accuracy for detection coil periphery member

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011021288A1 (en) * 2009-08-19 2011-02-24 三菱電機株式会社 Vibration damping device for elevator
JPWO2011021288A1 (en) * 2009-08-19 2013-01-17 三菱電機株式会社 Elevator damping device
JP2015082935A (en) * 2013-10-23 2015-04-27 日本電産サンキョー株式会社 Motor and method for connecting winding to terminal pin in motor

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