JPS617525A - Magnetic switch for starter - Google Patents
Magnetic switch for starterInfo
- Publication number
- JPS617525A JPS617525A JP12525984A JP12525984A JPS617525A JP S617525 A JPS617525 A JP S617525A JP 12525984 A JP12525984 A JP 12525984A JP 12525984 A JP12525984 A JP 12525984A JP S617525 A JPS617525 A JP S617525A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- movable contact
- starter
- fixed
- magnetic switch
- 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.)
- Pending
Links
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明はスタータ用マグネチックスイッチに係り、特に
その接点がアーク等のために高温にさらされて焼損する
のを防止したスタータ用マグネチックスイッチに関する
。[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a magnetic switch for a starter, and more particularly to a magnetic switch for a starter that prevents its contacts from being burnt out due to exposure to high temperatures due to arcing, etc. .
従来のスタータ用マグネチックスイッチは、特開昭55
−117074に開示されているように、可動接点と接
点押しばね間に絶縁部材を挿入し、可動接点軸と絶縁ケ
ース間には接点戻しばねを配置した構造となっている。The conventional magnetic switch for starters was developed in Japanese Patent Application Laid-Open No. 55
117074, an insulating member is inserted between a movable contact and a contact push spring, and a contact return spring is arranged between a movable contact shaft and an insulating case.
しかし、この従来構造では、アーク等の発生のために接
点部が高熱にさらされ絶縁部材が溶解してしまった時、
可動接点はふらつき状態となり、可動接点と固定接点間
が確実に離れるという保証はなく、従って通電し放しに
なってスイッチそのものが焼損に至るという危険があっ
た。However, with this conventional structure, when the contact part is exposed to high heat due to arcing etc. and the insulating material melts,
The movable contact becomes unstable, and there is no guarantee that the movable contact and the fixed contact will be reliably separated, so there is a risk that the switch itself will be burnt out due to being left energized.
本発明の目的は、アークの発生などにより接点部が異常
に温度上昇したとき、電流を確実に遮断することのでき
るスタータ用マグネチックスイッチを提供するにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a magnetic switch for a starter that can reliably cut off current when the temperature of the contact portion increases abnormally due to occurrence of an arc or the like.
本発明は可動接点を絶縁する絶縁部材に熱可塑材を使用
し、アークなどで異常温度上昇が発生したときにはこの
熱可塑材が溶解して確実に接点が開放され、電流が遮断
されるような構造としたこと−を特徴としたものである
。The present invention uses a thermoplastic material for the insulating member that insulates the movable contact, and when an abnormal temperature rise occurs due to an arc, etc., this thermoplastic material melts, ensuring that the contact is opened and the current is interrupted. It is characterized by its structure.
以下、本発明の一実施例を第1図及び第2図により説明
する。第1図に於て、直流モータ2のアーマチャ1と回
転軸3は一体的に構成されている。An embodiment of the present invention will be described below with reference to FIGS. 1 and 2. In FIG. 1, an armature 1 and a rotating shaft 3 of a DC motor 2 are integrally constructed.
回転軸3にはエンジン(図示せず)と直結したエンジン
リングギヤー4と軸方向に移動することによって噛合う
ピニオン5と該ピニオン5と一体的に構成された一方向
クラッチ6、スリーブ7が配置されている。スリーブ7
の外周にはスリーブワッシャ8が固着され、マグネチッ
クスイッチ9のプランジャ10の突起部11に一端を係
合し、ハウジング12と接触して回転支点13を持つシ
フトレバ−14の他端15で挾持される。トーションば
ね16はシフトレバ−14の回転支点13をハウジング
12に押しつけている。マグネチックスイッチ9のプラ
ンジャ19はケース17、固定ボス18を一体的に持つ
側板19と磁気回路を形成し、コイル20への通電によ
って磁束を発生する。プランジャ10の中央部には可動
接点軸21をルーズ状態で収納する凹部22が設置され
、その底部23には固定ボス18との間に戻しばね24
を保持するように可動接点軸21と一体的に構成された
鍔部25が接触している。Arranged on the rotating shaft 3 are a pinion 5 that engages with an engine ring gear 4 that is directly connected to an engine (not shown) by moving in the axial direction, a one-way clutch 6 that is integrally formed with the pinion 5, and a sleeve 7. has been done. sleeve 7
A sleeve washer 8 is fixed to the outer periphery of the magnetic switch 9, one end of which is engaged with the protrusion 11 of the plunger 10 of the magnetic switch 9, and the other end 15 of the shift lever 14, which is in contact with the housing 12 and has a rotational fulcrum 13, is held in place. Ru. The torsion spring 16 presses the rotation fulcrum 13 of the shift lever 14 against the housing 12. The plunger 19 of the magnetic switch 9 forms a magnetic circuit with the case 17 and the side plate 19 that integrally includes the fixed boss 18, and generates magnetic flux by energizing the coil 20. A recess 22 is installed in the center of the plunger 10 to accommodate the movable contact shaft 21 in a loose state, and a return spring 24 is provided at the bottom 23 of the recess 22 between the movable contact shaft 21 and the fixed boss 18.
A collar portion 25 integrally formed with the movable contact shaft 21 is in contact with the movable contact shaft 21 so as to hold the movable contact shaft 21 .
第2図は可動接点26とその周辺の5本発明の特徴とす
る部分を拡大して示したもので、可動接点26は熱可塑
絶縁ブツシュ27と熱硬化絶縁ブツシュ28で可動接点
軸21と絶縁され、ブツシュ28の可動接点軸21に接
した部分281の外径は同じく軸21に接したブツシュ
27の部分271の外径より大きく設定されている。止
め輪29と可動接点軸21の段差30の間には可動接点
26の内径より外径が小さい接点押しばね31が可動接
点軸21上に配置されている。可動接点26と熱硬化絶
縁ブツシュ28間に設置された弾性体32は、接点押し
ばね31の荷重より小さい荷重を持ち、内径は接点押し
ばね31の外径より大きい。FIG. 2 is an enlarged view of the movable contact 26 and the five surrounding parts that are characteristic of the present invention. The movable contact 26 is insulated from the movable contact shaft 21 by a thermoplastic insulating bush 27 and a thermosetting insulating bush 28 The outer diameter of a portion 281 of the bushing 28 that is in contact with the movable contact shaft 21 is set larger than the outer diameter of a portion 271 of the bushing 27 that is also in contact with the shaft 21. A contact pressing spring 31 having an outer diameter smaller than the inner diameter of the movable contact 26 is arranged on the movable contact shaft 21 between the retaining ring 29 and the step 30 of the movable contact shaft 21 . The elastic body 32 installed between the movable contact 26 and the thermosetting insulating bushing 28 has a load smaller than the load of the contact push spring 31 and has an inner diameter larger than the outer diameter of the contact push spring 31 .
第1図へ戻って、可動接点26と対峙する固定接点33
.34は絶縁ケース35に固定され、固定接点33はボ
ルト36を介して電源37に接続され、固定接点34は
ボルト38を介して直流モータ2に接続される。スイッ
チ39は電源37とマグネチックスイッチ9のコイル2
0間を継続する。Returning to FIG. 1, the fixed contact 33 facing the movable contact 26
.. 34 is fixed to an insulating case 35, the fixed contact 33 is connected to a power source 37 via a bolt 36, and the fixed contact 34 is connected to the DC motor 2 via a bolt 38. The switch 39 connects the power supply 37 and the coil 2 of the magnetic switch 9.
Continue between 0 and 0.
以上のような構成において、スイッチ39を投入すると
、電源37よりマグネチックスイッチ9のコイル20に
通電され、磁気回路のケース17、側板19、固定ボス
18、プランジャ10間に磁束が発生し、プランジャ1
0は固定ボス18との間隙を埋めるように左方に移動す
る。プランジャ10の移動によって可動接点26は可動
接点軸21を介して左方に移動し固定接点33.’34
に接触する。一方、プランジャ10の突起部11に係合
したシフトレバ−14は回転支点13を中心に回動し、
シフトレバ−14の他端15に挾持したスリーブワッシ
ャ8はスリーブ7、一方向クラッチ6を介してピニオン
5を右方に移動させ、エンジンリングギヤー4に噛合う
ことになる。ピニオン5とエンジンリングギヤー4が噛
合うと可動接点26も固定接点33.34に接触するか
ら直流モータ2には電源37よりボルト36、固定接点
33、可動接点26、固定接点34、ボ゛ルト37を通
じて通電され、アーマチャ1が回転する。In the above configuration, when the switch 39 is turned on, the coil 20 of the magnetic switch 9 is energized by the power supply 37, and a magnetic flux is generated between the case 17 of the magnetic circuit, the side plate 19, the fixed boss 18, and the plunger 10, and the plunger 1
0 moves to the left so as to fill the gap with the fixed boss 18. As the plunger 10 moves, the movable contact 26 moves to the left via the movable contact shaft 21, and the fixed contact 33. '34
come into contact with. On the other hand, the shift lever 14 engaged with the protrusion 11 of the plunger 10 rotates around the rotational fulcrum 13,
The sleeve washer 8 held on the other end 15 of the shift lever 14 moves the pinion 5 to the right via the sleeve 7 and the one-way clutch 6, so that it meshes with the engine ring gear 4. When the pinion 5 and the engine ring gear 4 mesh, the movable contact 26 also contacts the fixed contacts 33 and 34, so the DC motor 2 is connected to the power supply 37 by the bolt 36, the fixed contact 33, the movable contact 26, the fixed contact 34, and the bolt 37. Electricity is applied through the armature 1, and the armature 1 rotates.
アーマチャ1の回転につれ回転軸3、スリーブ7、一方
向クラッチ6を介してピニオン5が回転しエンジンリン
グギヤー4を回してエンジンを起動する。このアーマチ
ャ1の回転力でエンジンを回転中、固定接点33、可動
接点26、固定接点34には電源37より大電流が流れ
ているが、何らかの原因で接点部にアークが発生し可動
接点26が高熱にさらされると、熱可塑絶縁ブツシュ2
7は溶解し、可動接点26は弾性体32の反発力で第2
図右方へ押されて固定接点33.34との接触が強制的
に断たれ、アークの発生が停止される。As the armature 1 rotates, the pinion 5 rotates via the rotating shaft 3, sleeve 7, and one-way clutch 6, turning the engine ring gear 4 and starting the engine. While the engine is being rotated by the rotational force of the armature 1, a large current is flowing through the fixed contact 33, movable contact 26, and fixed contact 34 from the power supply 37, but for some reason an arc occurs in the contact and the movable contact 26 When exposed to high heat, the thermoplastic insulation bushing 2
7 melts, and the movable contact 26 becomes the second contact due to the repulsive force of the elastic body 32.
Pushed to the right in the figure, contact with the fixed contacts 33 and 34 is forcibly broken, and arc generation is stopped.
以上の実施例から明らかなように、本発明によれば、ア
ークの発生などで接点部が異常な温度上昇を受けても、
ある温度以上になると熱可塑絶縁ブツシュがヒユーズの
役目をして溶解し接点部の大電流を強制的に遮断できる
ので、接点周辺の絶縁物等の焼損を完全に防止できると
いう効果がある。As is clear from the above embodiments, according to the present invention, even if the contact portion receives an abnormal temperature rise due to occurrence of an arc,
When the temperature exceeds a certain temperature, the thermoplastic insulating bushing acts as a fuse and melts, forcibly cutting off the large current at the contact, which has the effect of completely preventing burnout of the insulators around the contact.
第1図は本発明の一実施例を示す縦断面図、第2図は第
1図の接点部拡大断面図である。FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention, and FIG. 2 is an enlarged sectional view of the contact portion of FIG. 1.
Claims (1)
が固定接点に接触することによつてスタータへの電流供
給を行うスタータ用マグネチックスイッチに於て、可動
接点軸と可動接点間を熱可塑材によつて絶縁するととも
に、平常時には上記熱可塑材を接点押しばねで押圧する
ことによつて可動接点が固定接点に押圧されかつ高温の
ために上記熱可塑材が溶解した時には上記接点押しばね
とは逆方向に作用するように取付けられた弾性体が可動
接点を固定接点から遠ざける方向へ押圧するような構造
を有せしめたことを特徴とするスタータ用マグネチック
スイッチ。1. In magnetic switches for starters, which supply current to the starter by the movable contact attached to the movable contact shaft contacting the fixed contact when the coil is energized, thermoplastic is used to connect the movable contact shaft and the movable contact. In normal conditions, the movable contact is pressed against the fixed contact by pressing the thermoplastic material with a contact pressing spring, and when the thermoplastic material melts due to high temperature, the contact pressing spring presses the thermoplastic material. A magnetic switch for a starter, characterized in that an elastic body attached to act in the opposite direction presses a movable contact in a direction away from a fixed contact.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12525984A JPS617525A (en) | 1984-06-20 | 1984-06-20 | Magnetic switch for starter |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12525984A JPS617525A (en) | 1984-06-20 | 1984-06-20 | Magnetic switch for starter |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS617525A true JPS617525A (en) | 1986-01-14 |
Family
ID=14905662
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12525984A Pending JPS617525A (en) | 1984-06-20 | 1984-06-20 | Magnetic switch for starter |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS617525A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09210015A (en) * | 1996-02-02 | 1997-08-12 | Hirata Corp | Gas pressure-operated actuator |
JP2012199130A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Corp | Electromagnetic relay |
-
1984
- 1984-06-20 JP JP12525984A patent/JPS617525A/en active Pending
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH09210015A (en) * | 1996-02-02 | 1997-08-12 | Hirata Corp | Gas pressure-operated actuator |
JP2012199130A (en) * | 2011-03-22 | 2012-10-18 | Panasonic Corp | Electromagnetic relay |
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