JP2008288040A - Electromagnetic switch - Google Patents

Electromagnetic switch Download PDF

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JP2008288040A
JP2008288040A JP2007131989A JP2007131989A JP2008288040A JP 2008288040 A JP2008288040 A JP 2008288040A JP 2007131989 A JP2007131989 A JP 2007131989A JP 2007131989 A JP2007131989 A JP 2007131989A JP 2008288040 A JP2008288040 A JP 2008288040A
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holding member
rod
plunger
fixed
electromagnetic switch
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JP4849006B2 (en
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Kenji Kawasaki
健司 川▲崎▼
Kazuhiro Ando
安藤　　和広
Tadahiro Kurasawa
忠博 倉沢
Yamato Utsunomiya
大和 宇都宮
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Denso Corp
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Denso Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an electromagnetic switch 1 wherein a rod 9 fixing method capable of abolishing a distortion removing process is adopted to attain a cost reduction and to improve assembling performance. <P>SOLUTION: A rod 9 to support a movable contact 17 through an insulating member 16 is fixed to a plunger 2 through a cylindrical holding member 8. The holding member 8 is fixed by pressing it in a hole part formed in the end face of the plunger 2. At the point of time when the plunger side end part of the rod 9 in which a snap fit is provided is fitted in the inner periphery of the holding member 8, and the locking pawl 20a of the snap fit passes through the inner periphery of the holding member 8 and protrudes to the outside of the holding member 8, the snap fit expands to the outside (returns to an original shape). Thereby, the locking pawl 20a is locked by the end face of the holding member 8, and the rod 9 is prevented from being pulled out from the holding member 8. By this structure, the cost reduction becomes possible, since welding distortion is not produced, and a process to remove the distortion can be abolished. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、スタータのモータ回路に設けられるメイン接点を開閉する電磁スイッチに関する。   The present invention relates to an electromagnetic switch for opening and closing a main contact provided in a motor circuit of a starter.

従来、エンジンの始動を行うスタータは、モータ回路のメイン接点を開閉する電磁スイッチを有している（特許文献１参照）。
この電磁スイッチは、図５に示す様に、電磁石を形成する電磁コイル１００と、電磁石に吸引されて移動するプランジャ１１０と、このプランジャ１１０に固定されたロッド１２０と、このロッド１２０に絶縁部材１３０を介して支持される可動接点１４０と、２本の外部端子１５０、１６０を介してモータ回路に接続される一組の固定接点１７０等より構成され、プランジャ１１０の動きに応じて可動接点１４０が一組の固定接点１７０間を断続することによりメイン接点を開閉する。
特開２００６−１３４７７６号公報 Conventionally, a starter that starts an engine has an electromagnetic switch that opens and closes a main contact of a motor circuit (see Patent Document 1).
As shown in FIG. 5, the electromagnetic switch includes an electromagnetic coil 100 that forms an electromagnet, a plunger 110 that is attracted and moved by the electromagnet, a rod 120 fixed to the plunger 110, and an insulating member 130 attached to the rod 120. The movable contact 140 is supported via the external contact 150 and a pair of fixed contacts 170 connected to the motor circuit via the two external terminals 150, 160. The main contact is opened and closed by intermittently connecting the pair of fixed contacts 170.
Japanese Patent Laid-Open No. 2006-134776

ところで、上記の電磁スイッチは、ロッド１２０の端部をプランジャ１１０の端面に溶接で固定しているが、この場合、溶接歪み（熱変形）によりロッド１２０が傾く恐れがあるため、歪み取りを実施する必要があり、コストアップの要因となっている。
また、ロッド１２０をプランジャ１１０に固定した後、接点圧スプリング１８０と、絶縁部材１３０に保持された可動接点１４０とがロッド１２０の外周に組み付けられ、さらに、可動接点１４０の抜け止め用ワッシャ１９０がロッド１２０の端部に熱カシメ等により固定される。このワッシャ１９０の固定作業は、接点圧スプリング１８０を撓ませながら、ワッシャ１９０を所定の位置に保持して行う必要があるため、作業状態が不安定であり、組み付け作業が困難であった。
本発明は、上記事情に基づいて成されたもので、その目的は、歪み取りを廃止できるロッドの固定方法を採用することによってコストダウンを図ると共に、組み付け性を向上できる電磁スイッチを提供することにある。 By the way, in the electromagnetic switch, the end of the rod 120 is fixed to the end surface of the plunger 110 by welding. In this case, the rod 120 may be tilted due to welding distortion (thermal deformation), and thus the distortion is removed. It is necessary to do so, which is a factor of cost increase.
Further, after the rod 120 is fixed to the plunger 110, the contact pressure spring 180 and the movable contact 140 held by the insulating member 130 are assembled to the outer periphery of the rod 120, and a retaining washer 190 for the movable contact 140 is provided. The end of the rod 120 is fixed by heat caulking or the like. Since the washer 190 needs to be fixed while holding the washer 190 in a predetermined position while the contact pressure spring 180 is bent, the working state is unstable and the assembling work is difficult.
The present invention has been made based on the above circumstances, and an object thereof is to provide an electromagnetic switch capable of reducing cost and improving assembly by adopting a rod fixing method capable of eliminating distortion removal. It is in.

（請求項１の発明）
本発明は、通電を受けて電磁石を形成する電磁コイルと、電磁石に吸引されて移動するプランジャと、このプランジャに円筒形状の保持部材を介して固定されるロッドと、モータ回路に接続される一組の固定接点と、ロッドの反プランジャ側に絶縁部材を介して支持され、プランジャの動きに応じて一組の固定接点間を断続する可動接点と、プランジャが電磁石により吸引されて可動接点が一組の固定接点に当接した後、可動接点を付勢して一組の固定接点との間に接点圧を付与する接点圧スプリングとを備える電磁スイッチであって、保持部材は、プランジャの端面に形成された穴部に圧入して固定され、ロッドは、プランジャ側の端部を保持部材の内周に嵌め込んで固定されていることを特徴とする。 (Invention of Claim 1)
The present invention relates to an electromagnetic coil that is energized to form an electromagnet, a plunger that is attracted and moved by the electromagnet, a rod that is fixed to the plunger via a cylindrical holding member, and a motor circuit. A pair of fixed contacts, a movable contact supported by an insulating member on the non-plunger side of the rod and intermittently connected between a pair of fixed contacts in accordance with the movement of the plunger, and the plunger is attracted by an electromagnet so that the movable contact is unified. An electromagnetic switch comprising a contact pressure spring that urges the movable contact and applies contact pressure to the set of fixed contacts after contacting the fixed contacts of the set, and the holding member is an end face of the plunger The rod is fixed by being press-fitted into the hole portion formed therein, and the rod is fixed by fitting the end portion on the plunger side into the inner periphery of the holding member.

上記のロッドは、プランジャ側の端部を保持部材の内周に嵌め込んで固定されるので、プランジャの端面にロッドを溶接する必要はない。また、保持部材は、プランジャの端面に形成された穴部に圧入して固定されるので、保持部材をプランジャの端面に溶接する必要もない。すなわち、ロッドを固定するための手段として溶接を用いないので、溶接歪みが生じることはない。その結果、歪み取り工程を廃止できるので、コストダウンが可能となる。
また、ロッドをプランジャの端面に溶接する必要がないので、ロッドのプランジャ側端部を保持部材の内周に嵌め込む前に、予めロッドの外周に接点圧スプリングと絶縁部材に保持された可動接点とを組み付けておくことができ、組み付け性が向上する。 Since the above-mentioned rod is fixed by fitting the end portion on the plunger side into the inner periphery of the holding member, it is not necessary to weld the rod to the end surface of the plunger. Moreover, since the holding member is press-fitted and fixed in a hole formed in the end surface of the plunger, it is not necessary to weld the holding member to the end surface of the plunger. That is, since welding is not used as a means for fixing the rod, welding distortion does not occur. As a result, the distortion removing process can be abolished, and the cost can be reduced.
In addition, since it is not necessary to weld the rod to the end surface of the plunger, the movable contact previously held by the contact pressure spring and the insulating member on the outer periphery of the rod before fitting the plunger side end of the rod to the inner periphery of the holding member Can be assembled in advance, and assemblability is improved.

（請求項２の発明）
請求項１に記載した電磁スイッチにおいて、ロッドは、プランジャ側の端部に中空部が形成されると共に、この中空部の外周に複数のスナップフィットが設けられ、このスナップフィットの先端部に有する係止爪を保持部材の端面に係止させることにより、保持部材からロッドが抜け止めされていることを特徴とする。
この場合、スナップフィットの弾性を利用して容易にロッドを保持部材の内周に嵌め込むことができ、且つ、スナップフィットの係止爪を保持部材の端面に係止させることで、保持部材からロッドが抜けることを防止できる。 (Invention of Claim 2)
2. The electromagnetic switch according to claim 1, wherein the rod has a hollow portion formed at an end portion on the plunger side, and a plurality of snap fits are provided on an outer periphery of the hollow portion, and the rod has a tip portion of the snap fit. The rod is prevented from coming off from the holding member by locking the pawl to the end surface of the holding member.
In this case, the rod can be easily fitted to the inner periphery of the holding member using the elasticity of the snap fit, and the snap claw of the snap fit can be locked to the end surface of the holding member. The rod can be prevented from coming off.

（請求項３の発明）
請求項２に記載した電磁スイッチにおいて、保持部材の長さをＬ１、保持部材の端面に係止される係止爪の係止面から中空部の底面までの長さをＬ２とした時に、
Ｌ１＞Ｌ２…………………（１）
上記（１）式の関係が成立することを特徴とする。
この場合、ロッドの中空部の周囲だけでなく、中空部より強度を有する部位（中実部）を保持部材の内周に嵌め込んでいるので、保持部材によってロッドを確実に保持でき、ロッドの傾きを防止できる。 (Invention of Claim 3)
In the electromagnetic switch according to claim 2, when the length of the holding member is L1, and the length from the locking surface of the locking claw locked to the end surface of the holding member to the bottom surface of the hollow portion is L2,
L1> L2 ……………… (1)
The relationship of the above formula (1) is established.
In this case, not only the periphery of the hollow portion of the rod but also the portion (solid portion) having strength from the hollow portion is fitted into the inner periphery of the holding member, so that the rod can be reliably held by the holding member, Tilt can be prevented.

（請求項４の発明）
請求項１に記載した電磁スイッチにおいて、ロッドは、プランジャ側の端部を保持部材の内周に圧入して固定されていることを特徴とする。
この場合、保持部材によりロッドの端部を安定かつ確実に保持できるので、ロッドの傾きを防止できる。 (Invention of Claim 4)
The electromagnetic switch according to claim 1 is characterized in that the rod is fixed by press-fitting an end on the plunger side into the inner periphery of the holding member.
In this case, since the end of the rod can be stably and reliably held by the holding member, the inclination of the rod can be prevented.

本発明を実施するための最良の形態を以下の実施例により詳細に説明する。   The best mode for carrying out the present invention will be described in detail with reference to the following examples.

図１は電磁スイッチ１の断面図である。
本実施例の電磁スイッチ１は、スタータ（図示せず）のモータ回路に設けられるメイン接点（後述する）を開閉する働きを有し、図１に示す様に、電磁石の吸引力を利用してプランジャ２を駆動するソレノイド３と、このソレノイド３との間に接点室４を形成して、その接点室４にメイン接点を収納する接点カバー５とを備える。
ソレノイド３は、通電時に電磁石を形成する電磁コイル６と、電磁石により磁化される固定鉄心７と、磁化された固定鉄心７に吸引されて図示右方向へ移動するプランジャ２と、このプランジャ２に保持部材８を介して固定されるロッド９と、電磁石の吸引力が消滅した時にプランジャ２を押し戻すためのリターンスプリング１０等より構成される。 FIG. 1 is a cross-sectional view of the electromagnetic switch 1.
The electromagnetic switch 1 of the present embodiment has a function of opening and closing a main contact (described later) provided in a motor circuit of a starter (not shown), and uses the attractive force of an electromagnet as shown in FIG. A solenoid 3 for driving the plunger 2 and a contact cover 5 that forms a contact chamber 4 between the solenoid 3 and stores the main contact in the contact chamber 4 are provided.
The solenoid 3 includes an electromagnetic coil 6 that forms an electromagnet when energized, a fixed iron core 7 that is magnetized by the electromagnet, a plunger 2 that is attracted to the magnetized fixed iron core 7 and moves to the right in the figure, and is held by the plunger 2. It comprises a rod 9 fixed via a member 8, a return spring 10 for pushing back the plunger 2 when the attractive force of the electromagnet disappears.

電磁コイル６は、プランジャ２を吸引するための磁力を発生する吸引コイル６ａと、吸引されたプランジャ２を保持するための磁力を発生する保持コイル６ｂとで構成され、ソレノイドケース１１の内部に収納されている。
固定鉄心７は、電磁コイル６の一端側に配置される環状のベースコア部７ａと、このベースコア部７ａの内周側に組み合わされる内側コア部７ｂとで構成される。
プランジャ２は、電磁コイル６の内周に内側コア部７ｂと対向して配置され、その内側コア部７ｂとプランジャ２との間にリターンスプリング１０が配設されている。
接点カバー５は、例えば、樹脂成形品であり、ベースコア部７ａとの間に板状のゴムパッキン１２を挟んでソレノイドケース１１の開口部内に組み付けられ、ソレノイドケース１１の端部にかしめ固定されている。 The electromagnetic coil 6 includes a suction coil 6 a that generates a magnetic force for attracting the plunger 2 and a holding coil 6 b that generates a magnetic force for holding the attracted plunger 2, and is housed in the solenoid case 11. Has been.
The fixed iron core 7 includes an annular base core portion 7a disposed on one end side of the electromagnetic coil 6 and an inner core portion 7b combined on the inner peripheral side of the base core portion 7a.
The plunger 2 is disposed on the inner periphery of the electromagnetic coil 6 so as to face the inner core portion 7 b, and a return spring 10 is disposed between the inner core portion 7 b and the plunger 2.
The contact cover 5 is, for example, a resin molded product, and is assembled into the opening of the solenoid case 11 with a plate-like rubber packing 12 sandwiched between the contact cover 5 and the base core portion 7 a, and is caulked and fixed to the end of the solenoid case 11. ing.

メイン接点は、２本の外部端子１３、１４を介してモータ回路に接続される一組の固定接点１５と、ロッド９の反プランジャ側に絶縁部材１６を介して支持される可動接点１７とで構成され、この可動接点１７が一組の固定接点１５間を断続することによりメインが開閉される。なお、可動接点１７は、保持部材８と絶縁部材１６との間に配設される接点圧スプリング１８によりロッド９の先端側（反プランジャ側）へ付勢され、そのロッド９の先端部に固定されたワッシャ１９に当接して抜け止めされている。
２本の外部端子１３、１４は、バッテリ電流が供給されるＢ端子ボルト１３と、スタータモータから取り出されるリード線（図示せず）が接続されるＭ端子ボルト１４であり、それぞれ接点カバー５に固定されている。 The main contacts are a set of fixed contacts 15 connected to the motor circuit via two external terminals 13 and 14 and a movable contact 17 supported via an insulating member 16 on the opposite side of the rod 9 from the plunger. The movable contact 17 is configured to intermittently connect between the pair of fixed contacts 15 to open and close the main. The movable contact 17 is urged toward the distal end side (the non-plunger side) of the rod 9 by a contact pressure spring 18 disposed between the holding member 8 and the insulating member 16 and fixed to the distal end portion of the rod 9. It is in contact with the washer 19 and is prevented from coming off.
The two external terminals 13 and 14 are a B terminal bolt 13 to which battery current is supplied and an M terminal bolt 14 to which a lead wire (not shown) taken out from the starter motor is connected. It is fixed.

続いて、本発明に係る保持部材８およびロッド９の固定方法について説明する。
保持部材８は、例えば、ロッド９の外径より僅かに大きい内径を有する金属製のパイプ材を所定の長さに切断したもので、図２に示す様に、プランジャ２の端面に形成された穴部２ａに圧入して固定されている。
ロッド９は、図３に示す様に、プランジャ側の端部に中空部９ａが設けられると共に、この中空部９ａの外周にスリット状の切り込み９ｂ〔同図（ａ）参照〕が複数ヶ所形成されて、複数のスナップフィット２０が設けられており、このスナップフィット２０を有するプランジャ側の端部を保持部材８の内周に嵌め込んで固定される。 Next, a method for fixing the holding member 8 and the rod 9 according to the present invention will be described.
The holding member 8 is formed by cutting a metal pipe member having an inner diameter slightly larger than the outer diameter of the rod 9 into a predetermined length, and is formed on the end surface of the plunger 2 as shown in FIG. The hole 2a is press-fitted and fixed.
As shown in FIG. 3, the rod 9 is provided with a hollow portion 9a at the end on the plunger side, and a plurality of slit-shaped cuts 9b (see FIG. 3A) are formed on the outer periphery of the hollow portion 9a. A plurality of snap fits 20 are provided, and an end portion on the plunger side having the snap fits 20 is fitted into the inner periphery of the holding member 8 and fixed.

スナップフィット２０は、先端部に鉤状の係止爪２０ａを有し、この係止爪２０ａが保持部材８の端面に係止されることで、保持部材８からロッド９が抜け止めされている（図１参照）。すなわち、ロッド９は、スナップフィット２０の係止爪２０ａが保持部材８の内周に入るように、スナップフィット２０の先端側を径方向内側へ弾性変形させた状態で、プランジャ側の端部を保持部材８の内周に嵌め込み、係止爪２０ａが保持部材８の内周を通り抜けて保持部材８の外側に突き出た時点で、スナップフィット２０が外側に広がる（元の形状に戻る）ことにより、係止爪２０ａが保持部材８の端面に係止されて、保持部材８からロッド９が抜け止めされる。
なお、図２に示す様に、保持部材８の長さをＬ１、保持部材８の端面に係止される係止爪２０ａの係止面から中空部９ａの底面までの長さをＬ２とした時に、下記（１）式の関係が成立している。
Ｌ１＞Ｌ２…………………（１） The snap fit 20 has a hook-shaped locking claw 20 a at the tip, and the locking claw 20 a is locked to the end surface of the holding member 8, so that the rod 9 is prevented from coming off from the holding member 8. (See FIG. 1). That is, the rod 9 has its end on the plunger side in a state where the distal end side of the snap fit 20 is elastically deformed radially inward so that the locking claw 20a of the snap fit 20 enters the inner periphery of the holding member 8. The snap fit 20 expands outward (returns to its original shape) when it is fitted into the inner periphery of the holding member 8 and the locking claw 20a passes through the inner periphery of the holding member 8 and protrudes to the outside of the holding member 8. The locking claw 20a is locked to the end surface of the holding member 8, and the rod 9 is prevented from coming off from the holding member 8.
As shown in FIG. 2, the length of the holding member 8 is L1, and the length from the locking surface of the locking claw 20a locked to the end surface of the holding member 8 to the bottom surface of the hollow portion 9a is L2. Sometimes, the relationship of the following formula (1) is established.
L1> L2 ……………… (1)

次に、電磁スイッチ１の作動を説明する。
電磁コイル６への通電により電磁石が形成されて固定鉄心７が磁化されると、固定鉄心７の内側コア部７ｂとプランジャ２との間に吸引力が働き、プランジャ２がリターンスプリング１０を押し縮めながら内側コア部７ｂ（図１の右方向）に吸引されて移動する。このプランジャ２の移動により、ロッド９が押し出されて可動接点１７が一組の固定接点１５に当接した後、接点圧スプリング１８により可動接点１７が押圧されてメイン接点が閉状態となり、バッテリからスタータモータへ給電される。
エンジン始動後、電磁コイル６への通電が停止して電磁石の吸引力が消滅すると、リターンスプリング１０の反力でプランジャ２が押し戻され、可動接点１７が一組の固定接点１５から離れてメイン接点が開状態となり、スタータモータへの給電が停止される。 Next, the operation of the electromagnetic switch 1 will be described.
When an electromagnet is formed by energizing the electromagnetic coil 6 and the fixed iron core 7 is magnetized, an attractive force acts between the inner core portion 7 b of the fixed iron core 7 and the plunger 2, and the plunger 2 compresses the return spring 10. However, it is sucked and moved in the inner core portion 7b (right direction in FIG. 1). By this movement of the plunger 2, the rod 9 is pushed out and the movable contact 17 comes into contact with the set of fixed contacts 15. Then, the movable contact 17 is pressed by the contact pressure spring 18 to close the main contact, and from the battery. Power is supplied to the starter motor.
After the engine is started, when the energization of the electromagnetic coil 6 is stopped and the attraction force of the electromagnet disappears, the plunger 2 is pushed back by the reaction force of the return spring 10, and the movable contact 17 is separated from the set of fixed contacts 15 to become the main contact. Is opened, and power supply to the starter motor is stopped.

（実施例１の作用及び効果）
本実施例の電磁スイッチ１は、可動接点１７を支持するロッド９が保持部材８を介してプランジャ２に固定されている。つまり、ロッド９は、プランジャ側の端部を保持部材８の内周に嵌め込んで固定されるので、プランジャ２の端面にロッド９を溶接する必要はない。また、保持部材８は、プランジャ２の端面に形成された穴部２ａに圧入して固定されるので、保持部材８をプランジャ２の端面に溶接する必要もない。この構成によれば、ロッド９を固定するための手段として溶接を用いないので、溶接歪みが生じることはない。その結果、歪み取り工程を廃止できるので、コストダウンが可能となる。 (Operation and Effect of Example 1)
In the electromagnetic switch 1 of this embodiment, the rod 9 that supports the movable contact 17 is fixed to the plunger 2 via the holding member 8. That is, the rod 9 is fixed by fitting the end portion on the plunger side into the inner periphery of the holding member 8, so that it is not necessary to weld the rod 9 to the end surface of the plunger 2. Moreover, since the holding member 8 is press-fitted and fixed in the hole 2 a formed in the end surface of the plunger 2, it is not necessary to weld the holding member 8 to the end surface of the plunger 2. According to this structure, since welding is not used as a means for fixing the rod 9, welding distortion does not occur. As a result, the distortion removing process can be abolished, and the cost can be reduced.

また、ロッド９をプランジャ２の端面に溶接する必要がないので、ロッド９の端部を保持部材８の内周に嵌め込む前に、予めロッド９の外周に接点圧スプリング１８と絶縁部材１６に保持された可動接点１７とを組み付けておくことができる。すなわち、可動接点１７の抜け止めを行うワッシャ１９は、ロッド９を保持部材８に嵌め込む前に、予めロッド９の端部に固定しておくことができる（図２参照）。このため、ワッシャ１９をロッド９の端部に固定する際に、接点圧スプリング１８を撓ませながら行う必要はなく、接点圧スプリング１８の荷重を受けないため、ワッシャ１９の固定作業を容易にできる。   In addition, since it is not necessary to weld the rod 9 to the end face of the plunger 2, the contact pressure spring 18 and the insulating member 16 are placed on the outer periphery of the rod 9 in advance before the end of the rod 9 is fitted to the inner periphery of the holding member 8. The held movable contact 17 can be assembled. That is, the washer 19 that prevents the movable contact 17 from being detached can be fixed in advance to the end of the rod 9 before the rod 9 is fitted into the holding member 8 (see FIG. 2). Therefore, when the washer 19 is fixed to the end of the rod 9, it is not necessary to bend the contact pressure spring 18, and since the load of the contact pressure spring 18 is not received, the washer 19 can be fixed easily. .

また、ロッド９を保持部材８の内周に嵌め込む際に、絶縁部材１６に保持された可動接点１７および接点圧スプリング１８がロッド９の端部から抜け落ちることもなく、ワッシャ１９によって抜け止めされるので、組み付け作業も容易である。
さらに、ロッド９は、中空部９ａの周囲だけでなく、中空部９ａより強度を有する部位（中実部）まで保持部材８の内周に嵌め込んでいるので、保持部材８によってロッド９を確実に保持でき、ロッド９の傾きを防止できる。 Further, when the rod 9 is fitted into the inner periphery of the holding member 8, the movable contact 17 and the contact pressure spring 18 held by the insulating member 16 do not fall off from the end of the rod 9, and are prevented by the washer 19. Therefore, the assembly work is also easy.
Furthermore, since the rod 9 is fitted not only around the hollow portion 9a but also to the inner periphery of the holding member 8 up to a portion (solid portion) having a strength higher than the hollow portion 9a, the rod 9 is securely fixed by the holding member 8. The rod 9 can be prevented from tilting.

図４はプランジャ２に保持部材８およびロッド９を固定した断面図である。
この実施例２は、ロッド９を保持部材８の内周に圧入して固定する方法を示す。
保持部材８は、実施例１と同じく、プランジャ２の端面に形成された穴部２ａに圧入して固定され、その保持部材８の内周にロッド９のプランジャ側を圧入して固定される。
また、保持部材８の内周には、ロッド９の圧入深さを規制する段差８ａが形成され、ロッド９は、プランジャ側の端面周縁部が段差８ａに当接する位置まで圧入されている。
上記の構成によれば、保持部材８によりロッド９のプランジャ側を安定かつ確実に保持できるので、ロッド９の傾きを防止できる。 FIG. 4 is a sectional view in which the holding member 8 and the rod 9 are fixed to the plunger 2.
The second embodiment shows a method in which the rod 9 is press-fitted and fixed to the inner periphery of the holding member 8.
As in the first embodiment, the holding member 8 is fixed by being press-fitted into a hole 2 a formed in the end face of the plunger 2, and the plunger side of the rod 9 is press-fitted and fixed to the inner periphery of the holding member 8.
In addition, a step 8a that restricts the press-fitting depth of the rod 9 is formed on the inner periphery of the holding member 8, and the rod 9 is press-fitted to a position where the peripheral edge portion on the plunger side contacts the step 8a.
According to said structure, since the plunger side of the rod 9 can be hold | maintained stably and reliably by the holding member 8, the inclination of the rod 9 can be prevented.

電磁スイッチの断面図である。It is sectional drawing of an electromagnetic switch. ロッドを保持部材に嵌め込む工程を示す断面図である（実施例１）。It is sectional drawing which shows the process of fitting a rod in a holding member (Example 1). （ａ）ロッドの先端側から見た軸方向平面図、（ｂ）ロッドの側面図である（実施例１）。(A) The axial direction top view seen from the front end side of a rod, (b) It is a side view of a rod (Example 1). プランジャに保持部材およびロッドを固定した断面図である（実施例２）。(Example 2) which is sectional drawing which fixed the holding member and the rod to the plunger. 電磁スイッチの断面図である（従来技術）。It is sectional drawing of an electromagnetic switch (prior art).

符号の説明Explanation of symbols

１ 電磁スイッチ
２ プランジャ
２ａ プランジャの端面に形成された穴部
６ 電磁コイル
８ 保持部材
９ ロッド
９ａ ロッドの中空部
１５ 一組の固定接点
１６ 絶縁部材
１７ 可動接点
１８ 接点圧スプリング
２０ スナップフィット
２０ａ スナップフィットの係止爪 DESCRIPTION OF SYMBOLS 1 Electromagnetic switch 2 Plunger 2a Hole part formed in end surface of plunger 6 Electromagnetic coil 8 Holding member 9 Rod 9a Hollow part of rod 15 One set of fixed contact 16 Insulating member 17 Movable contact 18 Contact pressure spring 20 Snap fit 20a Snap fit Locking claws

Claims (4)

通電を受けて電磁石を形成する電磁コイルと、
前記電磁石に吸引されて移動するプランジャと、
このプランジャに円筒形状の保持部材を介して固定されるロッドと、
モータ回路に接続される一組の固定接点と、
前記ロッドの反プランジャ側に絶縁部材を介して支持され、前記プランジャの動きに応じて前記一組の固定接点間を断続する可動接点と、
前記プランジャが前記電磁石に吸引されて前記可動接点が前記一組の固定接点に当接した後、前記可動接点を付勢して前記一組の固定接点との間に接点圧を付与する接点圧スプリングとを備える電磁スイッチであって、
前記保持部材は、前記プランジャの端面に形成された穴部に圧入して固定され、
前記ロッドは、プランジャ側の端部を前記保持部材の内周に嵌め込んで固定されていることを特徴とする電磁スイッチ。 An electromagnetic coil that is energized to form an electromagnet;
A plunger that is attracted and moved by the electromagnet;
A rod fixed to the plunger via a cylindrical holding member;
A set of fixed contacts connected to the motor circuit;
A movable contact that is supported on an opposite side of the rod via an insulating member and intermittently connects between the set of fixed contacts according to the movement of the plunger;
After the plunger is attracted by the electromagnet and the movable contact comes into contact with the set of fixed contacts, contact pressure is applied to bias the movable contact and apply contact pressure between the set of fixed contacts. An electromagnetic switch comprising a spring,
The holding member is press-fitted and fixed in a hole formed in an end surface of the plunger,
The electromagnetic switch according to claim 1, wherein the rod is fixed by fitting an end portion on a plunger side into an inner periphery of the holding member. 請求項１に記載した電磁スイッチにおいて、
前記ロッドは、プランジャ側の端部に中空部が形成されると共に、この中空部の外周に複数のスナップフィットが設けられ、このスナップフィットの先端部に有する係止爪を前記保持部材の端面に係止させることにより、前記保持部材から前記ロッドが抜け止めされていることを特徴とする電磁スイッチ。 The electromagnetic switch according to claim 1,
The rod has a hollow portion formed at the end on the plunger side, and a plurality of snap fits are provided on the outer periphery of the hollow portion, and a locking claw provided at the tip end of the snap fit is provided on the end surface of the holding member. An electromagnetic switch, wherein the rod is prevented from coming off from the holding member by being locked. 請求項２に記載した電磁スイッチにおいて、
前記保持部材の長さをＬ１、前記保持部材の端面に係止される前記係止爪の係止面から前記中空部の底面までの長さをＬ２とした時に、
Ｌ１＞Ｌ２…………………（１）
上記（１）式の関係が成立することを特徴とする電磁スイッチ。 The electromagnetic switch according to claim 2,
When the length of the holding member is L1, and the length from the locking surface of the locking claw locked to the end surface of the holding member to the bottom surface of the hollow portion is L2,
L1> L2 ……………… (1)
An electromagnetic switch characterized by satisfying the relationship expressed by the above formula (1). 請求項１に記載した電磁スイッチにおいて、
前記ロッドは、プランジャ側の端部を前記保持部材の内周に圧入して固定されていることを特徴とする電磁スイッチ。 The electromagnetic switch according to claim 1,
2. The electromagnetic switch according to claim 1, wherein the rod is fixed by press-fitting an end on the plunger side into the inner periphery of the holding member.
JP2007131989A 2007-05-17 2007-05-17 Electromagnetic switch Expired - Fee Related JP4849006B2 (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011074818A (en) * 2009-09-30 2011-04-14 Denso Corp Electromagnetic switching device
JP2013089294A (en) * 2011-10-13 2013-05-13 Mitsubishi Electric Corp Magnet switch for starter, and method of manufacturing the same
JP2015141893A (en) * 2014-01-27 2015-08-03 エルエス産電株式会社Lsis Co., Ltd. electromagnetic switching device
JP2017033952A (en) * 2016-11-14 2017-02-09 日本特殊陶業株式会社 relay

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002289430A (en) * 2001-01-18 2002-10-04 Hitachi Ltd Electromagnet and switchgear operating mechanism using it
JP2005108530A (en) * 2003-09-29 2005-04-21 Denso Corp Electromagnetic switch for starter

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002289430A (en) * 2001-01-18 2002-10-04 Hitachi Ltd Electromagnet and switchgear operating mechanism using it
JP2005108530A (en) * 2003-09-29 2005-04-21 Denso Corp Electromagnetic switch for starter

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011074818A (en) * 2009-09-30 2011-04-14 Denso Corp Electromagnetic switching device
JP2013089294A (en) * 2011-10-13 2013-05-13 Mitsubishi Electric Corp Magnet switch for starter, and method of manufacturing the same
JP2015141893A (en) * 2014-01-27 2015-08-03 エルエス産電株式会社Lsis Co., Ltd. electromagnetic switching device
US9431200B2 (en) 2014-01-27 2016-08-30 Lsis Co., Ltd. Electromagnetic relay
JP2017033952A (en) * 2016-11-14 2017-02-09 日本特殊陶業株式会社 relay

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