JP5412625B2 - Differential transformer - Google Patents
Differential transformer Download PDFInfo
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- JP5412625B2 JP5412625B2 JP2010112018A JP2010112018A JP5412625B2 JP 5412625 B2 JP5412625 B2 JP 5412625B2 JP 2010112018 A JP2010112018 A JP 2010112018A JP 2010112018 A JP2010112018 A JP 2010112018A JP 5412625 B2 JP5412625 B2 JP 5412625B2
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- outer periphery
- differential transformer
- bobbin
- cylindrical stator
- winding body
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本発明は、差動変圧器に関し、特に、筒状ステータの外周に金属網体からなるシールド体を設けるとともに、シールド体の外周に熱収縮チューブからなる外皮体を設けることで、製造コストを低減できるとともに、軽量化できるようにするための新規な改良に関するものである。 The present invention relates to a differential transformer, and in particular, reduces the manufacturing cost by providing a shield body made of a metal mesh body on the outer periphery of a cylindrical stator and an outer skin body made of a heat-shrinkable tube on the outer periphery of the shield body. The present invention relates to a new improvement for enabling weight reduction.
従来用いられていたこの種の差動変圧器としては、例えば下記の特許文献１等に示されている構造が用いられている。一般的に、この種の差動変圧器は図２に示すように構成されている。すなわち、従来の差動変圧器では、円筒状のボビン１の外周に巻線体２が設けられるとともに、巻線体２の外周に筒状ステータ３が設けられている。筒状ステータ３の外周には、巻線体２及び筒状ステータ３を外部環境から保護するための金属ケース１０が設けられている。この金属ケース１０は、金属製のパイプ又は棒から加工されるケース体であり、筒状ステータ３の外周を囲む金属板から構成される。 As this type of differential transformer conventionally used, for example, the structure shown in the following Patent Document 1 or the like is used. Generally, this type of differential transformer is configured as shown in FIG. That is, in the conventional differential transformer, the winding body 2 is provided on the outer periphery of the cylindrical bobbin 1, and the cylindrical stator 3 is provided on the outer periphery of the winding body 2. A metal case 10 for protecting the winding body 2 and the cylindrical stator 3 from the external environment is provided on the outer periphery of the cylindrical stator 3. The metal case 10 is a case body processed from a metal pipe or rod, and is composed of a metal plate surrounding the outer periphery of the cylindrical stator 3.
周知のように、巻線体２は、一次コイルと第１及び第２の二次コイルとから構成されており、一次コイルに電流が流されることで、第１及び第２の二次コイルがそれぞれ励磁される。ボビン１の内側に設けられた挿通孔１ａには、直線的な変位量の監視が必要とされる被検出対象に接続された磁性体コア（図示せず）が挿通され、ボビン１の延在方向１ｂに沿う磁性体コアの変位に応じて、第１及び第２の二次コイルの変圧比が変化される。すなわち、このような差動変圧器は、磁性体コアの変位に応じて巻線体２からの出力電圧が変化されるように構成されており、出力電圧が監視されることで被検出対象の直線的な変位量が監視される。 As is well known, the winding body 2 includes a primary coil and first and second secondary coils. When a current is passed through the primary coil, the first and second secondary coils are Each is excited. A magnetic core (not shown) connected to a detection target that needs to be monitored for a linear displacement amount is inserted into the insertion hole 1a provided inside the bobbin 1, and the bobbin 1 extends. The transformation ratio of the first and second secondary coils is changed according to the displacement of the magnetic core along the direction 1b. That is, such a differential transformer is configured such that the output voltage from the winding body 2 is changed according to the displacement of the magnetic core, and the output voltage is monitored to detect the object to be detected. A linear displacement is monitored.
上記のような従来の差動変圧器では、筒状ステータの外周を囲む金属板からなる金属ケースを用いる構造なので、金属製のパイプや棒等の素材から金属ケース１０を作成するために機械加工が必要となり、大きな製造コストが必要とされる。また、金属ケース１０における材料の重量比率が高いため、軽量化が困難である。 Since the conventional differential transformer as described above uses a metal case made of a metal plate surrounding the outer periphery of the cylindrical stator, it is machined to produce the metal case 10 from a material such as a metal pipe or rod. Is required, and a large manufacturing cost is required. Moreover, since the weight ratio of the material in the metal case 10 is high, it is difficult to reduce the weight.
本発明は、上記のような課題を解決するためになされたものであり、その目的は、製造コストを低減できるとともに、軽量化できる差動変圧器を提供することである。 The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a differential transformer that can reduce the manufacturing cost and reduce the weight.
本発明に係る差動変圧器は、円筒状のボビンの外周に巻線体が設けられるとともに、前記巻線体の外周に筒状ステータが設けられ、前記ボビンの内側の挿通孔に挿通された磁性体コアが前記ボビンの延在方向に沿って変位されることで前記巻線体からの出力電圧が変化される差動変圧器であって、前記筒状ステータの外周に設けられた金属網体からなるシールド体と、前記シールド体の外周に設けられた熱収縮チューブからなる外皮体とを備える。 In the differential transformer according to the present invention, a winding body is provided on the outer periphery of a cylindrical bobbin, and a cylindrical stator is provided on the outer periphery of the winding body, and is inserted into an insertion hole inside the bobbin. A differential transformer in which an output voltage from the winding body is changed by displacing a magnetic core along the extending direction of the bobbin, and a metal net provided on an outer periphery of the cylindrical stator A shield body made of a body and an outer skin body made of a heat-shrinkable tube provided on the outer periphery of the shield body.
本発明の差動変圧器によれば、筒状ステータの外周に金属網体からなるシールド体を設けるとともに、シールド体の外周に熱収縮チューブからなる外皮体を設けるように構成したので、従来の金属ケースを用いる場合に比べて、製造コストを低減できるとともに、軽量化できる。 According to the differential transformer of the present invention, since the shield body made of a metal mesh body is provided on the outer periphery of the cylindrical stator and the outer skin body made of a heat shrinkable tube is provided on the outer periphery of the shield body, Compared with the case where a metal case is used, the manufacturing cost can be reduced and the weight can be reduced.
以下、本発明を実施するための形態について、図面を参照して説明する。
実施の形態１．
図１は、本発明の実施の形態１による差動変圧器の断面図である。なお、従来の差動変圧器と同一又は同等部分については同一の符号を用いて説明する。図において、円筒状のボビン１の外周には巻線体２が設けられており、この巻線体２の外周には金属製薄板が屈曲される等して構成された筒状ステータ３が設けられている。
Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a cross-sectional view of a differential transformer according to a first embodiment of the present invention. The same or equivalent parts as those of the conventional differential transformer will be described using the same reference numerals. In the figure, a winding body 2 is provided on the outer periphery of a cylindrical bobbin 1, and a cylindrical stator 3 configured by bending a thin metal plate is provided on the outer periphery of the winding body 2. It has been.
周知のように、巻線体２は、一次コイルと第１及び第２の二次コイルとから構成されており、一次コイルに電流が流されることで、第１及び第２の二次コイルがそれぞれ励磁される。ボビン１の内側に設けられた挿通孔１ａには、直線的な変位量の監視が必要とされる被検出対象に接続された磁性体コア（図示せず）が挿通され、ボビン１の延在方向１ｂに沿う磁性体コアの変位に応じて、第１及び第２の二次コイルの変圧比が変化される。すなわち、このような差動変圧器は、磁性体コアの変位に応じて巻線体２からの出力電圧が変化されるように構成されており、出力電圧が監視されることで被検出対象の直線的な変位量が監視される。 As is well known, the winding body 2 includes a primary coil and first and second secondary coils. When a current is passed through the primary coil, the first and second secondary coils are Each is excited. A magnetic core (not shown) connected to a detection target that needs to be monitored for a linear displacement amount is inserted into the insertion hole 1a provided inside the bobbin 1, and the bobbin 1 extends. The transformation ratio of the first and second secondary coils is changed according to the displacement of the magnetic core along the direction 1b. That is, such a differential transformer is configured such that the output voltage from the winding body 2 is changed according to the displacement of the magnetic core, and the output voltage is monitored to detect the object to be detected. A linear displacement is monitored.
筒状ステータ３の外周には、シールド体４が設けられている。このシールド体４は、金属網体により構成されており、巻線を保護するための強度を向上させるとともに、外部の磁気環境から巻線体２及び筒状ステータ３を保護している。シールド体４の外周には、シールド体４の外周面全体を覆うように外皮体５が設けられている。すなわち、外皮体５は、シールド体４と比べて筒状ステータ３の端部により近づく位置まで延在されている。この外皮体５は、例えばポリオレフィン又はポリ塩化ビニル等のプラスチックからなる熱収縮チューブにより構成されている。すなわち、外皮体５は、筒状ステータ３の外周にシールド体４が巻き付けられた後に、シールド体４の外周に密着するように熱収縮チューブが収縮されることで形成される。この外皮体５は、塵、埃、及び水分からシールド体４等の内部構成を保護している。 A shield body 4 is provided on the outer periphery of the cylindrical stator 3. The shield body 4 is made of a metal net body, improves the strength for protecting the windings, and protects the winding body 2 and the cylindrical stator 3 from the external magnetic environment. A skin body 5 is provided on the outer periphery of the shield body 4 so as to cover the entire outer peripheral surface of the shield body 4. That is, the outer skin body 5 extends to a position closer to the end of the cylindrical stator 3 than the shield body 4. The outer skin 5 is constituted by a heat shrinkable tube made of a plastic such as polyolefin or polyvinyl chloride. That is, the outer skin 5 is formed by shrinking the heat-shrinkable tube so as to be in close contact with the outer periphery of the shield body 4 after the shield body 4 is wound around the outer periphery of the cylindrical stator 3. The outer skin 5 protects the internal structure of the shield body 4 and the like from dust, dust, and moisture.
このような差動変圧器では、筒状ステータ３の外周に金属網体からなるシールド体４を設けるとともに、シールド体４の外周に熱収縮チューブからなる外皮体５を設けるように構成したので、従来の金属ケース１０（図２参照）を作成するための複雑な機械加工を省略でき、従来の金属ケース１０を用いる場合に比べて、製造コストを低減できる。また、金属板から構成される従来の金属ケース１０を用いる場合に比べて軽量化できる。 In such a differential transformer, since the shield body 4 made of a metal mesh body is provided on the outer periphery of the cylindrical stator 3, and the outer skin body 5 made of a heat shrinkable tube is provided on the outer periphery of the shield body 4, The complicated machining for creating the conventional metal case 10 (see FIG. 2) can be omitted, and the manufacturing cost can be reduced as compared with the case where the conventional metal case 10 is used. Moreover, it can reduce in weight compared with the case where the conventional metal case 10 comprised from a metal plate is used.
１ ボビン
１ａ 挿通孔
１ｂ 延在方向
２ 巻線体
３ 筒状ステータ
４ シールド体
５ 外皮体
DESCRIPTION OF SYMBOLS 1 Bobbin 1a Insertion hole 1b Extension direction 2 Winding body 3 Cylindrical stator 4 Shield body 5 Outer body
Claims (1)
前記筒状ステータ（３）の外周に設けられた金属網体からなるシールド体（４）と、
前記シールド体（４）の外周に設けられた熱収縮チューブからなる外皮体（５）と
を備えていることを特徴とする差動変圧器。 A winding body (2) is provided on the outer periphery of the cylindrical bobbin (1), and a cylindrical stator (3) is provided on the outer periphery of the winding body (2), and the inner side of the bobbin (1) is inserted. The differential transformer in which the output voltage from the winding body (2) is changed by the displacement of the magnetic core inserted through the hole (1a) along the extending direction (1b) of the bobbin (1). A vessel,
A shield body (4) made of a metal net provided on the outer periphery of the cylindrical stator (3);
A differential transformer comprising: a skin body (5) made of a heat-shrinkable tube provided on the outer periphery of the shield body (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010112018A JP5412625B2 (en) | 2010-05-14 | 2010-05-14 | Differential transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010112018A JP5412625B2 (en) | 2010-05-14 | 2010-05-14 | Differential transformer |
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| Publication Number | Publication Date |
|---|---|
| JP2011243623A JP2011243623A (en) | 2011-12-01 |
| JP5412625B2 true JP5412625B2 (en) | 2014-02-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2010112018A Expired - Fee Related JP5412625B2 (en) | 2010-05-14 | 2010-05-14 | Differential transformer |
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Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0456315U (en) * | 1990-09-20 | 1992-05-14 | ||
| JP3767165B2 (en) * | 1998-04-15 | 2006-04-19 | 三菱電機株式会社 | Noise filter |
| JP3601380B2 (en) * | 1999-11-04 | 2004-12-15 | オムロン株式会社 | Displacement sensor |
| JP3975691B2 (en) * | 2001-06-01 | 2007-09-12 | オムロン株式会社 | Displacement sensor |
| JP2003163122A (en) * | 2001-11-26 | 2003-06-06 | Hitachi Ltd | Reactor for vehicle |
| KR101067731B1 (en) * | 2004-12-03 | 2011-09-28 | 니타 가부시키가이샤 | Electromagnetic interference inhibitor, antenna device and electronic communication apparatus |
| JP2006317284A (en) * | 2005-05-12 | 2006-11-24 | Matsushita Electric Works Ltd | Detection part for position sensor and position sensor using the same |
| JP4528271B2 (en) * | 2006-03-09 | 2010-08-18 | 三明電機株式会社 | Differential transformer type angle sensor |
| JP2008172071A (en) * | 2007-01-12 | 2008-07-24 | Tamagawa Seiki Co Ltd | Differential transformer manufacturing method |
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| JP2011243623A (en) | 2011-12-01 |
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