JP3731172B2 - Bushing structure of coil lead wire outlet in solenoid for solenoid valve - Google Patents

Bushing structure of coil lead wire outlet in solenoid for solenoid valve Download PDF

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Publication number
JP3731172B2
JP3731172B2 JP30323497A JP30323497A JP3731172B2 JP 3731172 B2 JP3731172 B2 JP 3731172B2 JP 30323497 A JP30323497 A JP 30323497A JP 30323497 A JP30323497 A JP 30323497A JP 3731172 B2 JP3731172 B2 JP 3731172B2
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JP
Japan
Prior art keywords
lead wire
coil lead
solenoid
cylindrical portion
resin
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
JP30323497A
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Japanese (ja)
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JPH11144952A (en
Inventor
雄亮 近藤
Original Assignee
三明電機株式会社
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Publication date
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Priority to JP30323497A priority Critical patent/JP3731172B2/en
Publication of JPH11144952A publication Critical patent/JPH11144952A/en
Application granted granted Critical
Publication of JP3731172B2 publication Critical patent/JP3731172B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Description

【0001】
【発明の属する技術分野】
本発明は、電磁弁用ソレノイドにおけるコイルリード線出し口のブッシング構造に関する。
【0002】
【従来の技術】
従来、電磁弁用ソレノイドは、例えば図3に示すように、熱硬化性樹脂を材料とするトランスファ成形により、又は、熱可塑性樹脂を材料とするインジェクション成形によりコイル40とケース50とヨーク60、70、80とを一体成形して構成され、コイルリード線90の出し口の防水性の向上を図るために、注型樹脂又はシリコン樹脂をゴムブッシング100の周囲に塗布していた。
【0003】
【発明が解決しようとする課題】
しかしながら、従来のブッシング構造によると、ゴムブッシング100とケース(成形樹脂)50との隙間から水が入り防水性を十分に確保することが困難であった。
【0004】
本発明は、上記問題点を解決し防水性を十分に確保することが可能なブッシング構造を提供することを目的とする。
【0005】
【課題を解決するための手段】
本発明の電磁弁用ソレノイドにおけるコイルリード線出し口のブッシング構造は、コイル側に配されコイルリード線が挿通された貫通孔を有するフランジ部と、前記フランジ部から延在し、前記コイルリード線が収容された筒状部とを有し、前記フランジ部及び前記筒状部の一部が成形樹脂に部分的に埋設されたゴムブッシングと、前記ゴムブッシングの前記筒状部の内周面に配設され、該筒状部を前記成形樹脂に対し押圧するC字状弾性部材と、前記筒状部の内部空間に前記コイルリード線を囲むように充填された注入樹脂と、からなることを特徴とする。
【0006】
【発明の作用効果】
本発明によると、C字状弾性部材がその弾性力によってゴムブッシングの筒状部を成形樹脂に押圧するようになるため、成形樹脂とゴムブッシングとの密着性が向上し、両者間の隙間を殆ど零にすることができ、防水性を十分に確保することができる。なお、筒状部の内部空間には注入樹脂が充填されることから、筒状部の内部空間を通じての水の浸入も防止することができる。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態を図面に基づいて説明する。
【0008】
図1は、一実施例による電磁弁用ソレノイドにおけるコイルリード線出し口のブッシング構造を示す断面図である。
【0009】
図1において、1はゴムブッシング、2は成形樹脂、3はコイルリード線、4はC字状弾性部材、5は注入樹脂をそれぞれ表してる。
【0010】
ゴムブッシング1は、図1に図示しないコイル側に配され、コイルリード線2が挿通された貫通孔11aを有するフランジ部11と、このフランジ部11から延在し、コイルリード線2が収容された筒状部12とを有し、フランジ部11及び筒状部12の一部が成形樹脂2に部分的に埋設されている。筒状部12の外周面には、環状突起12aが形成されており、また、内周面において環状突起12aと対応する位置には、環状凹部12bが形成されている。
【0011】
成形樹脂2は、コイルリード線2が挿通されたゴムブッシング1をインサート体として、熱硬化性樹脂を材料としたトランスファ成形又は熱可塑性樹脂を材料としたインジェクション成形により形成されている。したがって、成形樹脂2には、ゴムブッシング1の筒状部12の環状突起12aを収容する環状凹部21が形成されている。
【0012】
C字状弾性部材4は、図2(A)に示すようにCリング又は図2(B)に示すようにC形止め輪により構成されており、ゴムブッシング1の筒状部12の環状凹部12bに配設され、筒状部12の環状突起12aを成形樹脂2の環状凹部21に対し押圧している。
【0013】
注入樹脂5は、シリコン樹脂又は注型樹脂からなり、C字状弾性部材4と、筒状部12の内部空間にコイルリード線2を囲むように充填されている。
【0014】
次に、上記のように構成されたブッシング構造の作成方法を説明する。
【0015】
まず、コイルリード線2が挿通されたゴムブッシング1をインサート体として、熱硬化性樹脂を材料としたトランスファ成形又は熱可塑性樹脂を材料としたインジェクション成形により成形樹脂2を成形する。
【0016】
そして、C字状弾性部材4をゴムブッシング1の筒状部12の環状凹部12bに配設する。
【0017】
その後、注入樹脂5を筒状部12の内部空間に注入する。
【0018】
このような一連の工程を経て上記ブッシング構造が作成される。
【0019】
以上説明したように、本実施例によると、C字状弾性部材4がその弾性力によってゴムブッシング1の筒状部12を成形樹脂2に押圧するようになるため、成形樹脂2とゴムブッシング1との密着性が向上し、両者1、2間の隙間を殆ど零にすることができ、防水性を十分に確保することができる。また、筒状部12の内部空間には注入樹脂5が充填されることから、筒状部12の内部空間を通じての水の浸入も防止することができる。
【図面の簡単な説明】
【図1】一実施例による電磁弁用ソレノイドにおけるコイルリード線出し口のブッシング構造を示す断面図である。
【図2】C字状弾性部材の構成図である。
【図3】従来からのブッシング構造を使用した電磁弁用ソレノイドの一例の断面図である。
【符号の説明】
1 ゴムブッシング
11 フランジ部
11a 貫通孔
12 筒状部
2 成形樹脂
3 コイルリード線
4 C字状弾性部材
5 注入樹脂
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a bushing structure for a coil lead wire outlet in a solenoid for a solenoid valve.
[0002]
[Prior art]
Conventionally, as shown in FIG. 3, for example, a solenoid for a solenoid valve is manufactured by transfer molding using a thermosetting resin or by injection molding using a thermoplastic resin as a material. , 80 are integrally molded, and in order to improve the waterproof property of the outlet of the coil lead wire 90, a casting resin or a silicone resin is applied around the rubber bushing 100.
[0003]
[Problems to be solved by the invention]
However, according to the conventional bushing structure, it is difficult for water to enter from the gap between the rubber bushing 100 and the case (molded resin) 50 to ensure sufficient waterproofness.
[0004]
An object of this invention is to provide the bushing structure which can solve the said problem and can ensure waterproofness fully.
[0005]
[Means for Solving the Problems]
The bushing structure of the coil lead wire outlet in the solenoid for solenoid valve according to the present invention includes a flange portion disposed on the coil side and having a through hole through which the coil lead wire is inserted, and extends from the flange portion, and the coil lead wire A rubber bushing in which a part of the flange part and the cylindrical part is partially embedded in a molding resin, and an inner peripheral surface of the cylindrical part of the rubber bushing. And a C-shaped elastic member that presses the cylindrical portion against the molding resin, and an injection resin that is filled in the inner space of the cylindrical portion so as to surround the coil lead wire. Features.
[0006]
[Effects of the invention]
According to the present invention, since the C-shaped elastic member presses the cylindrical portion of the rubber bushing against the molding resin by its elastic force, the adhesion between the molding resin and the rubber bushing is improved, and the gap between the two is increased. It can be almost zero, and sufficient waterproofness can be secured. In addition, since the injection space is filled in the internal space of the cylindrical portion, it is possible to prevent water from entering through the internal space of the cylindrical portion.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0008]
FIG. 1 is a cross-sectional view showing a bushing structure of a coil lead wire outlet in a solenoid for a solenoid valve according to one embodiment.
[0009]
In FIG. 1, 1 is a rubber bushing, 2 is a molding resin, 3 is a coil lead wire, 4 is a C-shaped elastic member, and 5 is an injection resin.
[0010]
The rubber bushing 1 is arranged on the coil side not shown in FIG. 1 and has a flange portion 11 having a through hole 11a through which the coil lead wire 2 is inserted, and extends from the flange portion 11 so that the coil lead wire 2 is accommodated. The flange portion 11 and a part of the cylindrical portion 12 are partially embedded in the molding resin 2. An annular protrusion 12a is formed on the outer peripheral surface of the cylindrical portion 12, and an annular recess 12b is formed at a position corresponding to the annular protrusion 12a on the inner peripheral surface.
[0011]
The molding resin 2 is formed by transfer molding using a thermosetting resin as a material, or injection molding using a thermoplastic resin as a material, with the rubber bushing 1 through which the coil lead wire 2 is inserted as an insert body. Therefore, an annular recess 21 is formed in the molding resin 2 to accommodate the annular protrusion 12a of the cylindrical portion 12 of the rubber bushing 1.
[0012]
The C-shaped elastic member 4 is constituted by a C ring as shown in FIG. 2A or a C-shaped retaining ring as shown in FIG. 2B, and an annular recess of the cylindrical portion 12 of the rubber bushing 1. The annular protrusion 12 a of the cylindrical portion 12 is pressed against the annular recess 21 of the molding resin 2.
[0013]
The injection resin 5 is made of silicon resin or cast resin, and is filled so as to surround the coil lead wire 2 in the internal space of the C-shaped elastic member 4 and the cylindrical portion 12.
[0014]
Next, a method for creating the bushing structure configured as described above will be described.
[0015]
First, the molding resin 2 is molded by transfer molding using a thermosetting resin as a material or injection molding using a thermoplastic resin as a material, with the rubber bushing 1 through which the coil lead wire 2 is inserted as an insert body.
[0016]
Then, the C-shaped elastic member 4 is disposed in the annular recess 12 b of the cylindrical portion 12 of the rubber bushing 1.
[0017]
Thereafter, the injection resin 5 is injected into the internal space of the cylindrical portion 12.
[0018]
The bushing structure is created through such a series of steps.
[0019]
As described above, according to the present embodiment, the C-shaped elastic member 4 presses the tubular portion 12 of the rubber bushing 1 against the molding resin 2 by its elastic force, so that the molding resin 2 and the rubber bushing 1 are pressed. And the gap between the two 1 and 2 can be made almost zero, and sufficient waterproofness can be secured. Further, since the injection resin 5 is filled in the internal space of the cylindrical portion 12, it is possible to prevent water from entering through the internal space of the cylindrical portion 12.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a bushing structure of a coil lead wire outlet in a solenoid for a solenoid valve according to one embodiment.
FIG. 2 is a configuration diagram of a C-shaped elastic member.
FIG. 3 is a cross-sectional view of an example of a solenoid for a solenoid valve using a conventional bushing structure.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Rubber bushing 11 Flange part 11a Through-hole 12 Cylindrical part 2 Molding resin 3 Coil lead wire 4 C-shaped elastic member 5 Injection resin

Claims (1)

コイル側に配されコイルリード線が挿通された貫通孔を有するフランジ部と、前記フランジ部から延在し、前記コイルリード線が収容された筒状部とを有し、前記フランジ部及び前記筒状部の一部が成形樹脂に部分的に埋設されたゴムブッシングと、
前記ゴムブッシングの前記筒状部の内周面に配設され、該筒状部を前記成形樹脂に対し押圧するC字状弾性部材と、
前記筒状部の内部空間に前記コイルリード線を囲むように充填された注入樹脂と、
からなることを特徴とする電磁弁用ソレノイドにおけるコイルリード線出し口のブッシング構造。
A flange portion disposed on the coil side and having a through-hole through which the coil lead wire is inserted; and a cylindrical portion extending from the flange portion and accommodating the coil lead wire, the flange portion and the tube A rubber bushing in which a part of the shape part is partially embedded in the molding resin;
A C-shaped elastic member disposed on the inner peripheral surface of the cylindrical portion of the rubber bushing and pressing the cylindrical portion against the molding resin;
Injection resin filled so as to surround the coil lead wire in the internal space of the cylindrical portion;
A bushing structure for a coil lead wire outlet in a solenoid for a solenoid valve.
JP30323497A 1997-11-06 1997-11-06 Bushing structure of coil lead wire outlet in solenoid for solenoid valve Expired - Fee Related JP3731172B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP30323497A JP3731172B2 (en) 1997-11-06 1997-11-06 Bushing structure of coil lead wire outlet in solenoid for solenoid valve

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP30323497A JP3731172B2 (en) 1997-11-06 1997-11-06 Bushing structure of coil lead wire outlet in solenoid for solenoid valve

Publications (2)

Publication Number Publication Date
JPH11144952A JPH11144952A (en) 1999-05-28
JP3731172B2 true JP3731172B2 (en) 2006-01-05

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9401241B2 (en) * 2014-04-29 2016-07-26 Automatic Switch Company Solenoid coil for hazardous locations

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