JP5218036B2 - Electromagnetic relay - Google Patents

Electromagnetic relay Download PDF

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JP5218036B2
JP5218036B2 JP2008332527A JP2008332527A JP5218036B2 JP 5218036 B2 JP5218036 B2 JP 5218036B2 JP 2008332527 A JP2008332527 A JP 2008332527A JP 2008332527 A JP2008332527 A JP 2008332527A JP 5218036 B2 JP5218036 B2 JP 5218036B2
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contact
movable contact
diameter side
fixed
electromagnetic relay
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JP2010153301A (en
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正巳 新美
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Denso Corp
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Denso Corp
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Priority to DE102009060820A priority patent/DE102009060820A1/en
Priority to FR0906368A priority patent/FR2940719B1/en
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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H51/00—Electromagnetic relays
    • H01H51/02—Non-polarised relays
    • H01H51/04—Non-polarised relays with single armature; with single set of ganged armatures
    • H01H51/06—Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
    • H01H51/065—Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N11/00—Starting of engines by means of electric motors
    • F02N11/08—Circuits or control means specially adapted for starting of engines
    • F02N11/087—Details of the switching means in starting circuits, e.g. relays or electronic switches
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02N—STARTING OF COMBUSTION ENGINES; STARTING AIDS FOR SUCH ENGINES, NOT OTHERWISE PROVIDED FOR
    • F02N15/00—Other power-operated starting apparatus; Component parts, details, or accessories, not provided for in, or of interest apart from groups F02N5/00 - F02N13/00
    • F02N15/02—Gearing between starting-engines and started engines; Engagement or disengagement thereof
    • F02N15/04—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears
    • F02N15/06—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement
    • F02N15/067—Gearing between starting-engines and started engines; Engagement or disengagement thereof the gearing including disengaging toothed gears the toothed gears being moved by axial displacement the starter comprising an electro-magnetically actuated lever
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/16—Magnetic circuit arrangements
    • H01H50/18—Movable parts of magnetic circuits, e.g. armature
    • H01H50/30—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature
    • H01H50/305—Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature damping vibration due to functional movement of armature
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/54—Contact arrangements
    • H01H50/546—Contact arrangements for contactors having bridging contacts

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electromagnets (AREA)
  • Relay Circuits (AREA)

Description

本発明は、電気回路を開閉成する電磁継電器に関する。   The present invention relates to an electromagnetic relay that opens and closes an electric circuit.

特許文献１に例示する電磁継電器は、電磁ソレノイドへの通電により生じる磁気吸引力を利用して電気回路の開成・閉成を切り替える。この電磁継電器によれば、電磁ソレノイドのコイルへの通電による起磁力により固定鉄心および可動鉄心が磁化され、可動鉄心が固定鉄心側に吸引される。可動鉄心の一端部には樹脂製のロッドが設けられており、このロッドの先端が可動接点に当接している。そして、可動鉄心の移動に伴って、可動接点を固定接点方向に付勢する接点圧スプリングの弾性力により両接点は接触し、電気回路を閉成する。また、ソレノイドへの通電が切れると、可動鉄心の端部に設けられたリターンスプリングの弾性力が接点圧スプリングの弾性力に抗することにより、可動接点は固定接点から離れ、電気回路を開成する。
特開２００７−１０９４７０号公報 The electromagnetic relay exemplified in Patent Document 1 switches between opening and closing of an electric circuit using a magnetic attractive force generated by energization of an electromagnetic solenoid. According to this electromagnetic relay, the fixed iron core and the movable iron core are magnetized by the magnetomotive force generated by energizing the coil of the electromagnetic solenoid, and the movable iron core is attracted to the fixed iron core side. A resin rod is provided at one end of the movable iron core, and the tip of the rod is in contact with the movable contact. With the movement of the movable iron core, the two contacts come into contact with each other by the elastic force of the contact pressure spring that urges the movable contact in the direction of the fixed contact, thereby closing the electric circuit. When the solenoid is de-energized, the elastic force of the return spring provided at the end of the movable iron core resists the elastic force of the contact pressure spring, so that the movable contact is separated from the fixed contact and opens the electric circuit. .
JP 2007-109470 A

上記の例に示したような電磁継電器において、ソレノイドへの通電に伴い、可動接点が固定接点へ衝突接触した後、可動接点が固定接点から跳ね返るバウンス現象が生じる。このバウンス現象は、跳ね返り回数を重ねるごとに徐々に接点間距離を縮め、最終的には接点同士の接触状態へと収束し、電気回路が閉成する。バウンス現象が生じている間、接点間の電位差によってアーク放電が生じるため、接点の消耗が進み、電磁継電器の寿命を左右する大きな要因となっている。また、接点間の接触不良により、電気回路の閉成が確実になされない懸念や、アーク放電が生じることにより接点同士が溶着して電気回路の開成ができなくなる懸念もある。   In the electromagnetic relay as shown in the above example, as the solenoid is energized, a bounce phenomenon occurs in which the movable contact rebounds from the fixed contact after the movable contact collides with the fixed contact. This bounce phenomenon gradually reduces the distance between the contacts each time the number of rebounds is repeated, and finally converges to the contact state between the contacts, and the electric circuit is closed. While the bounce phenomenon occurs, arc discharge occurs due to the potential difference between the contacts, so that the contact wears out, which is a major factor affecting the life of the electromagnetic relay. In addition, there is a concern that the electrical circuit may not be closed reliably due to poor contact between the contacts, or that the contacts are welded together due to arc discharge, and the electrical circuit cannot be opened.

この他に、固定接点や可動接点などを収容する樹脂製のハウジングには、所望の付勢荷重を得るための長さを有する接点圧スプリングが収容されている。このため、ハウジングの軸方向長さが必然的に長くなり、電磁継電器の小型化を阻む要因となっていた。   In addition, a resin-made housing for accommodating a fixed contact or a movable contact accommodates a contact pressure spring having a length for obtaining a desired biasing load. For this reason, the axial direction length of the housing is inevitably long, which has been a factor that hinders the miniaturization of the electromagnetic relay.

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、接点の消耗を抑制することで寿命を向上し、且つ、小型化が可能な電磁継電器の提供にある。   The present invention has been made based on the above circumstances, and an object of the present invention is to provide an electromagnetic relay capable of improving the life and reducing the size by suppressing the consumption of the contacts.

（請求項１の発明）
本発明は、ハウジング内に固定される固定接点と、固定接点に対して相対変位可能に支持された可動接点と、可動接点が固定接点から遠ざかる方向に弾性力を付与して可動接点を固定接点から離れた位置に保持する第１弾性部材と、通電により第１弾性部材の弾性力に抗する磁力を発揮して可動接点を固定接点に接触させる電磁ソレノイドと、可動接点を固定接点方向に付勢する第２弾性部材と、を備える電磁継電器において、第２弾性部材は、直径の異なる内径側スプリングと外径側スプリングを有し、内径側スプリングは外径側スプリングの内側の空間に配置されていることを特徴とする。 (Invention of Claim 1)
The present invention relates to a fixed contact fixed in a housing, a movable contact supported to be relatively displaceable with respect to the fixed contact, and an elastic force in a direction in which the movable contact moves away from the fixed contact to fix the movable contact to the fixed contact. A first elastic member held at a position away from the electromagnetic solenoid, an electromagnetic solenoid that exerts a magnetic force that resists the elastic force of the first elastic member when energized, and contacts the movable contact with the fixed contact; and attaches the movable contact toward the fixed contact The second elastic member has an inner diameter side spring and an outer diameter side spring having different diameters, and the inner diameter side spring is disposed in a space inside the outer diameter side spring. It is characterized by.

可動接点を直径の異なる少なくとも２つのスプリングで付勢するため、１つのスプリングで付勢する場合よりも可動接点が受ける荷重が分散し、固定接点に対する接触を安定させることができる。これによって、接点間のバウンス現象は抑制され、接点間のアーク放電による接点の消耗を低減し、電磁継電磁の信頼性と寿命を向上させることができる。   Since the movable contact is urged by at least two springs having different diameters, the load received by the movable contact is more dispersed than when urged by one spring, and the contact with the fixed contact can be stabilized. Thereby, the bounce phenomenon between the contacts is suppressed, the wear of the contacts due to the arc discharge between the contacts can be reduced, and the reliability and life of the electromagnetic relay can be improved.

また、第２付勢部材を複数としたことで、スプリング１つ当たりの荷重を小さくすることができる。これによって、スプリングが１つの場合よりも、スプリングの全長を短縮できるため、接点と接点圧スプリングを収容するハウジングを小型化することができる。
また、内径側スプリングは固定接点と可動接点とが接触する接触面の接触範囲において径方向中心位置よりも内径側の前記接触範囲において前記接触面を付勢し、前記外径側スプリングは前記接触面の接触範囲において径方向中心位置よりも外径側の前記接触範囲において前記接触面を付勢することを特徴とする。 Moreover, the load per spring can be made small by having two or more 2nd urging | biasing members. Accordingly, since the total length of the spring can be shortened as compared with the case of one spring, the housing for accommodating the contact and the contact pressure spring can be reduced in size.
The inner diameter side spring biasing the contact surface in the contact area on the inner diameter side than the radial center position in the contact area of the contact surface of the fixed contact and the movable contact is in contact, the outer diameter side spring the contact In the contact range of the surface, the contact surface is biased in the contact range on the outer diameter side of the center position in the radial direction.

これによって、第２付勢部材は可動接点と固定接点との接触面の中心に対して均等に付勢できるため、可動接点に働くモーメントを抑制できる。即ち、第２付勢部材の荷重を効率よく固定接点と可動接点の接触面へ伝えることができ、可動接点は固定接点に対し安定して接触することで、接点間のアーク放電を抑制できる。
（請求項２の発明）
請求項１に記載の電磁継電器において、内径側スプリングは、ハウジング底面に設けられた突起部の外径によって位置決めされ、外径側スプリングは、ハウジングに設けられた可動接点収容部の内側面によって位置決めされていることを特徴とする。 As a result, the second biasing member can be biased evenly with respect to the center of the contact surface between the movable contact and the fixed contact, so that the moment acting on the movable contact can be suppressed. That is, the load of the second urging member can be efficiently transmitted to the contact surface between the fixed contact and the movable contact, and the movable contact can stably contact the fixed contact, thereby suppressing arc discharge between the contacts.
(Invention of Claim 2 )
The electromagnetic relay according to claim 1, wherein the inner diameter side spring is positioned by an outer diameter of a protrusion provided on the bottom surface of the housing, and the outer diameter side spring is positioned by an inner surface of a movable contact accommodating part provided on the housing. It is characterized by being.

これによって、外径側スプリングと内径側スプリングとのクリアランスを確保でき、スプリング同士の干渉を防止できる。これによって、２つのスプリングの合成荷重を可動接点に安定して可動接点に与えることができる。
（請求項３の発明）
請求項１〜２に記載の何れかの電磁継電器において、内径側スプリングは、可動接点の接触面に対して背面側に形成された凸部によって位置決めされていることを特徴とする。 Thereby, the clearance between the outer diameter side spring and the inner diameter side spring can be secured, and interference between the springs can be prevented. As a result, the combined load of the two springs can be stably applied to the movable contact.
(Invention of Claim 3 )
The electromagnetic relay according to any one of claims 1 to 2 , wherein the inner diameter side spring is positioned by a convex portion formed on the back side with respect to the contact surface of the movable contact.

これによって、可動接点が摺動をしても内径側スプリングとの当接位置がずれることはなく、最適な位置に維持することができる。また、可動接点の組み付けにおいて、内径側スプリングを押し縮めるとき、スプリングの中心が可動接点の中心とずれることがなく、
組み付け不良を防止することができる。
（請求項４の発明）
請求項１〜３に記載の何れかの電磁継電器において、可動接点は、可動接点収容部の内側面によって位置を案内されていることを特徴とする。 Thereby, even if the movable contact slides, the contact position with the inner diameter side spring does not shift and can be maintained at the optimum position. In the assembly of the movable contact, when the inner diameter side spring is compressed, the center of the spring is not shifted from the center of the movable contact.
Assembly failure can be prevented.
(Invention of Claim 4 )
The electromagnetic relay according to any one of claims 1 to 3 , wherein the position of the movable contact is guided by an inner surface of the movable contact accommodating portion.

これによって、可動接点の傾きを抑制するための軸部材等を用いなくても、可動接点の摺動に伴う傾きを抑制できる。このため、可動接点と固定接点との接触が安定し、接点間のアーク放電を抑制でき、また、可動接点の部品点数、加工工数を低減することができる。   Thereby, even if it does not use the shaft member etc. for suppressing the inclination of a movable contact, the inclination accompanying the sliding of a movable contact can be suppressed. For this reason, the contact between the movable contact and the fixed contact is stabilized, arc discharge between the contacts can be suppressed, and the number of parts of the movable contact and the number of processing steps can be reduced.

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。
［実施例１］ The best mode for carrying out the present invention will be described in detail with reference to the following examples.
[Example 1]

本発明の実施例１にかかる電磁継電器１の構成を、図１を用いて説明する。   The structure of the electromagnetic relay 1 concerning Example 1 of this invention is demonstrated using FIG.

本実施例１の電磁継電器１は、図１に示す様に、ハウジング２内に固定される固定接点３、４と、固定接点３、４に対して相対変位可能に支持された可動接点５と、可動接点５が固定接点３、４から遠ざかる方向に弾性力を付与して可動接点５を固定接点３、４から離れた位置に保持するリターンスプリング６（本発明の第１弾性部材）と、通電によりリターンスプリング６の弾性力に抗する磁力を発揮して可動接点５を固定接点３、４に接触させる電磁ソレノイド７と、可動接点５が固定接点３、４に近づく方向に弾性力を付与する接点圧スプリング８（本発明の第２弾性部材）と、を備える。   As shown in FIG. 1, the electromagnetic relay 1 according to the first embodiment includes fixed contacts 3 and 4 fixed in a housing 2, and a movable contact 5 supported so as to be relatively displaceable with respect to the fixed contacts 3 and 4. A return spring 6 (first elastic member of the present invention) that holds the movable contact 5 at a position away from the fixed contacts 3, 4 by applying an elastic force in a direction in which the movable contact 5 moves away from the fixed contacts 3, 4; An electromagnetic solenoid 7 that brings the movable contact 5 into contact with the fixed contacts 3 and 4 by exerting a magnetic force that resists the elastic force of the return spring 6 when energized, and an elastic force in the direction in which the movable contact 5 approaches the fixed contacts 3 and 4. Contact pressure spring 8 (second elastic member of the present invention).

固定接点３、４は、図１に示す様に、ハウジング２の接点室２ａ内に固定される一対の接点であり、導電性の金属板からなる。固定接点３、４は、ボルト端子１０、１１の根元に形成されたローレットに圧入固定されており、ボルト端子１０、１１と電気的に導通する。ボルト端子１０、１１は、ハウジング２の底部に形成されたボルト挿通孔に挿通され、ボルト端子１０、１１に形成された雄ねじ部１０ａ、１１ａにかしめワッシャ１２、１３が係合することによってハウジング２に固定されている。また、ボルト端子１０、１１とボルト挿通孔との間にはゴム製のＯリング１４、１５が介設されることで、ハウジング２内部への水分などの浸入を防止している。そして、ボルト端子１０、１１の頭部間１０ｂ、１１ｂには、抵抗体１６が電気的、機械的に接続されている。抵抗体１６は、抵抗率の高いニクロム線などの金属からなり、電気回路閉成時の突入電流を抑制する働きを有する。   As shown in FIG. 1, the fixed contacts 3 and 4 are a pair of contacts fixed in the contact chamber 2 a of the housing 2 and are made of a conductive metal plate. The fixed contacts 3 and 4 are press-fitted and fixed to knurls formed at the bases of the bolt terminals 10 and 11, and are electrically connected to the bolt terminals 10 and 11. The bolt terminals 10 and 11 are inserted into bolt insertion holes formed at the bottom of the housing 2, and the crimping washers 12 and 13 are engaged with the male screw portions 10 a and 11 a formed at the bolt terminals 10 and 11. It is fixed to. Further, rubber O-rings 14 and 15 are interposed between the bolt terminals 10 and 11 and the bolt insertion holes, thereby preventing moisture and the like from entering the housing 2. A resistor 16 is electrically and mechanically connected between the head portions 10b and 11b of the bolt terminals 10 and 11. The resistor 16 is made of a metal such as nichrome wire having a high resistivity, and has a function of suppressing an inrush current when the electric circuit is closed.

可動接点５は、図１に示す様に、ハウジング２内の可動接点収容部２ｂの内側面によって位置を案内されるように配置され、軸方向に摺動可能に支持されている。可動接点５は、樹脂製のロッド１７を介して可動鉄心１８に当接しており、可動鉄心１８の運動に連動して、可動接点収容部２ｂの内壁を摺動するように設けられている。   As shown in FIG. 1, the movable contact 5 is disposed so that its position is guided by the inner surface of the movable contact accommodating portion 2 b in the housing 2, and is supported so as to be slidable in the axial direction. The movable contact 5 is in contact with the movable iron core 18 via a resin rod 17 and is provided so as to slide on the inner wall of the movable contact accommodating portion 2 b in conjunction with the movement of the movable iron core 18.

リターンスプリング６は、図１に示す様に、ケース９の底部と可動鉄心１８との間に介設され、可動鉄心１８を固定接点３、４側に付勢している。これによって、可動接点５はハウジング２内の突起部２ｃの頂面へ押し付けられ、固定接点３、４と離れた位置に保持される。   As shown in FIG. 1, the return spring 6 is interposed between the bottom of the case 9 and the movable iron core 18, and urges the movable iron core 18 toward the fixed contacts 3 and 4. As a result, the movable contact 5 is pressed against the top surface of the protrusion 2 c in the housing 2 and held at a position away from the fixed contacts 3 and 4.

電磁ソレノイド７は、図１に示す様に、コイル２０と固定鉄心１９と可動鉄心１８により構成され、有底円筒状のケース９に収容される。コイル２０は、導線が樹脂製のボビン２１に巻回されてなり、ケース９の底部に配置される。そして、固定鉄心１９は、ボビン２１の中空部に挿入され、ケース９の底部に固定される。また、可動鉄心１８は、ボビン２１の中空部を摺動可能に支持される。ケース９の開口部であって、コイル２０収容部の端部には段差部９ａが形成されており、中心部に可動鉄心１８が挿通される挿通孔を有するプレート２２がこの段差部９ａに嵌合している。プレート２２は、例えば鉄などの金属材料からなり、ケース９と共に磁気回路を形成している。   As shown in FIG. 1, the electromagnetic solenoid 7 includes a coil 20, a fixed iron core 19, and a movable iron core 18, and is accommodated in a bottomed cylindrical case 9. The coil 20 has a conductive wire wound around a resin bobbin 21 and is disposed at the bottom of the case 9. The fixed iron core 19 is inserted into the hollow part of the bobbin 21 and fixed to the bottom part of the case 9. The movable iron core 18 is slidably supported in the hollow portion of the bobbin 21. A step portion 9a is formed at the end of the coil 20 housing portion, which is an opening of the case 9, and a plate 22 having an insertion hole through which the movable iron core 18 is inserted at the center portion is fitted into the step portion 9a. Match. The plate 22 is made of a metal material such as iron and forms a magnetic circuit together with the case 9.

接点圧スプリング８は、図１に示す様に、直径の異なる２つのスプリングからなり、ハウジング２内の可動接点収容部２ｂに収容される。それぞれのスプリングを内径側スプリング８ａと外径側スプリング８ｂとする。内径側スプリング８ａは外径側スプリング８ｂの内側の空間に配置されている。接点圧スプリング８の一端は、可動接点収容部２ｂ底部に当接し、他端は可動接点５に当接することで可動接点５を固定接点３、４方向に付勢している。ここで、内径側スプリング８ａは固定接点３、４と可動接点５とが接触する接触面の径方向中心位置よりも内径側を付勢し、前記外径側スプリングは前記接触面の径方向中心位置よりも外径側を付勢する。また、内径側スプリング８ａは、その内側面が可動接点収容部２ｂの底部に形成された突起部２ｃの表面と当接することによって位置決めされ、外径側スプリング８ｂは、その外側面が可動接点収容部２ｂの内側面によって位置決めされている。   As shown in FIG. 1, the contact pressure spring 8 includes two springs having different diameters, and is accommodated in the movable contact accommodating portion 2 b in the housing 2. The respective springs are referred to as an inner diameter side spring 8a and an outer diameter side spring 8b. The inner diameter side spring 8a is disposed in a space inside the outer diameter side spring 8b. One end of the contact pressure spring 8 is in contact with the bottom of the movable contact accommodating portion 2b, and the other end is in contact with the movable contact 5, thereby urging the movable contact 5 in the direction of the fixed contact 3 and 4. Here, the inner diameter side spring 8a biases the inner diameter side with respect to the radial center position of the contact surface where the fixed contacts 3, 4 and the movable contact 5 are in contact, and the outer diameter side spring is the radial center of the contact surface. The outer diameter side is biased from the position. The inner diameter side spring 8a is positioned by abutting the inner side surface thereof with the surface of the projection 2c formed on the bottom of the movable contact accommodating part 2b, and the outer side surface of the outer diameter side spring 8b is accommodated by the movable contact accommodating part. It is positioned by the inner surface of the part 2b.

ケース９の開口部の外径は、図１に示す様に、ハウジング２の開口部の外径よりも大きく設けられている。そして、ハウジング２の開口端の外径側にはゴム製のＯリング２３が嵌められており、ハウジング２の開口部はこのＯリング２３を介してケース９の開口部に挿入され、ハウジング２の開口端はプレート２２の表面に当接するまで挿入される。Ｏリング２３を設けることで、ケース９とハウジング２の隙間から水分が浸入することを防止している。また、ハウジング２の開口部の周方向一部あるいは全周がケース９の端部にかしめ固定される。   As shown in FIG. 1, the outer diameter of the opening of the case 9 is larger than the outer diameter of the opening of the housing 2. A rubber O-ring 23 is fitted on the outer diameter side of the opening end of the housing 2, and the opening of the housing 2 is inserted into the opening of the case 9 via the O-ring 23. The open end is inserted until it contacts the surface of the plate 22. Providing the O-ring 23 prevents moisture from entering through the gap between the case 9 and the housing 2. Further, a part or the entire circumference of the opening of the housing 2 is caulked and fixed to the end of the case 9.

次に、電磁継電器１の作動を図１と図２を用いて説明する。図１は、電磁ソレノイド７への非通電時における電磁継電器１の状態を示しており、図２は、電磁ソレノイド７への通電時における電磁継電器１の状態を示している。   Next, the operation of the electromagnetic relay 1 will be described with reference to FIGS. 1 and 2. FIG. 1 shows the state of the electromagnetic relay 1 when the electromagnetic solenoid 7 is not energized, and FIG. 2 shows the state of the electromagnetic relay 1 when the electromagnetic solenoid 7 is energized.

ボルト端子１０、１１には、電磁継電器１によって通電を断続する電気機器（図示せず）とバッテリ（図示せず）を有する電気回路に接続される。   The bolt terminals 10 and 11 are connected to an electric circuit having an electric device (not shown) and a battery (not shown) that are energized and interrupted by the electromagnetic relay 1.

可動接点５にロッドを介して当接する可動鉄心１８は、図１に示す様に、リターンスプリング６の弾性力が接点圧スプリング８の弾性力に抗してハウジング２側へ付勢される。これに伴って、可動接点５は、接点圧スプリング８を押し縮めた状態で、ハウジング２内に設けられた突起部２ｃの頂面に押し付けられる。このとき、可動接点５は固定接点３、４から離れた位置に保持されている。これによって、固定接点３、４間は抵抗体１６を介して導通し、抑制された電流が流れる。   As shown in FIG. 1, the movable iron core 18 that abuts the movable contact 5 via the rod is urged toward the housing 2 by the elastic force of the return spring 6 against the elastic force of the contact pressure spring 8. Along with this, the movable contact 5 is pressed against the top surface of the protrusion 2 c provided in the housing 2 in a state where the contact pressure spring 8 is compressed. At this time, the movable contact 5 is held at a position away from the fixed contacts 3 and 4. As a result, the fixed contacts 3 and 4 are electrically connected via the resistor 16 and a suppressed current flows.

電磁ソレノイド７のコイル２０に通電すると、固定鉄心１９と可動鉄心１８はコイル２０の起磁力によって磁化される。このとき、固定鉄心１９と可動鉄心１８の対抗する面は互いに異極となるため、引き合う磁力が発生する。そして、可動鉄心１８は、図２に示す様に、リターンスプリング６の弾性力に抗して固定鉄心１９側へ吸引されると共に、可動鉄心１８の運動に伴って、可動接点５が固定接点３、４へと衝突接触する。このとき、可動接点５が固定接点３、４から跳ね返るバウンス現象が生じる。このバウンス現象は、跳ね返り回数を重ねるごとに徐々に接点間距離を縮め、最終的には接点同士の接触状態へと収束し、固定接点３、４間は短絡する。これによって、ボルト端子１０、１１間に所望の電流が流れ、ボルト端子１０、１１に接続される電気機器が駆動する。   When the coil 20 of the electromagnetic solenoid 7 is energized, the fixed iron core 19 and the movable iron core 18 are magnetized by the magnetomotive force of the coil 20. At this time, since the opposing surfaces of the fixed iron core 19 and the movable iron core 18 are different from each other, an attractive magnetic force is generated. As shown in FIG. 2, the movable iron core 18 is attracted toward the fixed iron core 19 against the elastic force of the return spring 6, and the movable contact 5 is fixed to the fixed contact 3 as the movable iron core 18 moves. 4 to hit the collision. At this time, a bounce phenomenon occurs in which the movable contact 5 rebounds from the fixed contacts 3 and 4. This bounce phenomenon gradually reduces the distance between the contacts each time the number of rebounds is increased, eventually converges to a contact state between the contacts, and the fixed contacts 3 and 4 are short-circuited. As a result, a desired current flows between the bolt terminals 10 and 11, and the electric equipment connected to the bolt terminals 10 and 11 is driven.

電磁ソレノイド７への通電が切れると、固定鉄心１９と可動鉄心１８間に働く吸引力がなくなり、図１に示す様に、リターンスプリング６の弾性力によって、固定接点３、４と可動接点５は離れる。これによって、ボルト端子１０、１１に接続される電気機器の作動が停止する。   When the electromagnetic solenoid 7 is de-energized, the attractive force acting between the fixed iron core 19 and the movable iron core 18 disappears, and the fixed contacts 3, 4 and the movable contact 5 are moved by the elastic force of the return spring 6 as shown in FIG. Leave. As a result, the operation of the electrical equipment connected to the bolt terminals 10 and 11 is stopped.

次に、本実施例１の電磁継電器１をスタータ２５の補助接点として用いた場合の動作を、図４、５を用いて説明する。   Next, the operation when the electromagnetic relay 1 of the first embodiment is used as an auxiliary contact of the starter 25 will be described with reference to FIGS.

ＥＣＵ２４は、図４に示すタイムチャート上で、時刻ｔ１にてソレノイドスイッチ２６のコイル２７への通電を行い、その後、時刻ｔ２にて本実施例１の電磁継電器１のコイル２０への通電を行う。これにより、時刻ｔ１から時刻ｔ２までのｔ秒間は、モータ２８に通電される電流値がＡ１となり、全電圧時の電流値Ａ２より抑制される。   On the time chart shown in FIG. 4, the ECU 24 energizes the coil 27 of the solenoid switch 26 at time t1, and then energizes the coil 20 of the electromagnetic relay 1 of the first embodiment at time t2. . Thereby, for t seconds from time t1 to time t2, the current value supplied to the motor 28 is A1, which is suppressed from the current value A2 at the time of all voltages.

まず、時刻ｔ１にて、ＥＣＵ２４から信号を受けてスタータリレー２９がオン作動することで、コイル２７に通電される。これにより、プランジャ３０が吸引されて、図５に示す左方向へ移動することにより、シフトレバー３１を介してピニオンギヤ３２が反モータ方向（図示右方向）へ押し出される。   First, at time t1, the starter relay 29 is turned on in response to a signal from the ECU 24, whereby the coil 27 is energized. As a result, the plunger 30 is sucked and moved leftward as shown in FIG. 5, whereby the pinion gear 32 is pushed out in the counter-motor direction (rightward in the drawing) via the shift lever 31.

続いて、メイン接点３３ａ、３３ｂが閉じると、バッテリ３４から抵抗体１６を介して抑制された電流（電流値Ａ１）がモータ２８に通電されることにより、モータ２８が低速度で回転する。   Subsequently, when the main contacts 33a and 33b are closed, a current (current value A1) suppressed from the battery 34 via the resistor 16 is supplied to the motor 28, whereby the motor 28 rotates at a low speed.

このモータ２８の回転を受けてピニオンギヤ３２がリングギヤ３５に噛み合った後、ＥＣＵ２４により所定のタイミング（時刻ｔ２）で電磁継電器１のコイル２０に通電されると、可動接点５が吸引されて固定接点３、４を閉じることにより、抵抗体１６を短絡する短絡通路が形成される。その結果、バッテリ３４の全電圧がモータ２８に印加されて、モータ２８に高い電流（電流値Ａ２）が流れることにより、モータ２８が高速度で回転して、モータ２８の回転がピニオンギヤ３２からリングギヤ３５に伝達されてエンジンをクランキングする。
（実施例１の効果）
本実施例１の電磁継電器１は、内径側スプリング８ａと外径側スプリング８ｂの２つを有する接点圧スプリング８を用いることで、１つのスプリングで付勢する場合よりも可動接点５が受ける荷重が分散し、固定接点３、４に対する接触を安定させることができる。これによって、接点間のバウンス現象を抑制することで、接点間のアーク放電による接点の消耗を抑制し、電磁継電器１の信頼性と寿命を向上させることができる。 When the pinion gear 32 is engaged with the ring gear 35 by the rotation of the motor 28 and then the coil 24 of the electromagnetic relay 1 is energized at a predetermined timing (time t2) by the ECU 24, the movable contact 5 is attracted and the fixed contact 3 is attracted. By closing 4, a short-circuit path for short-circuiting the resistor 16 is formed. As a result, the entire voltage of the battery 34 is applied to the motor 28, and a high current (current value A2) flows through the motor 28. As a result, the motor 28 rotates at a high speed, and the rotation of the motor 28 is changed from the pinion gear 32 to the ring gear. 35 is transmitted to crank the engine.
(Effect of Example 1)
The electromagnetic relay 1 according to the first embodiment uses a contact pressure spring 8 having two of an inner diameter side spring 8a and an outer diameter side spring 8b, so that the load received by the movable contact 5 is higher than that when biased by one spring. Can be dispersed and the contact with respect to the fixed contacts 3 and 4 can be stabilized. Thus, by suppressing the bounce phenomenon between the contacts, it is possible to suppress contact consumption due to arc discharge between the contacts, and to improve the reliability and life of the electromagnetic relay 1.

また、接点圧スプリング８が可動接点５を付勢する位置を、可動接点５の固定接点３、４との接触範囲とすることで、接点圧スプリング８が可動接点５を付勢する作用点と、可動接点５が固定接点３、４から受ける反作用力の作用点が可動接点５の軸方向両側で略同じ位置となる。このため、可動接点５に働くモーメントを抑制できる。即ち、接点圧スプリング８の荷重を効率よく固定接点３、４と可動接点５の接触面へ伝えることができるため、可動接点５は固定接点３、４に対し安定して接触することで、接点間のアーク放電を抑制できる。   Further, by setting the position where the contact pressure spring 8 biases the movable contact 5 as the contact range of the movable contact 5 with the fixed contacts 3, 4, the operating point where the contact pressure spring 8 biases the movable contact 5, The point of action of the reaction force that the movable contact 5 receives from the fixed contacts 3 and 4 is at substantially the same position on both sides in the axial direction of the movable contact 5. For this reason, the moment acting on the movable contact 5 can be suppressed. That is, since the load of the contact pressure spring 8 can be efficiently transmitted to the contact surface between the fixed contacts 3 and 4 and the movable contact 5, the movable contact 5 stably contacts the fixed contacts 3 and 4. The arc discharge can be suppressed.

更に、可動接点５がハウジング２内の可動接点収容部２ｂの内側面によって位置を案内されるように配置されることで、可動接点５の傾きを抑制するための軸部材等を用いなくても、可動接点５の摺動に伴う傾きを抑制できる。このため、可動接点５と固定接点３、４との接触が安定し、接点間のアーク放電を抑制でき、また、可動接点５の部品点数、加工工数を低減することができる。そして、可動接点５と固定接点３、４との接触が安定し、接点間のアーク放電を抑制できる。   Furthermore, the movable contact 5 is arranged so that its position is guided by the inner surface of the movable contact accommodating portion 2b in the housing 2, so that a shaft member or the like for suppressing the inclination of the movable contact 5 can be used. The inclination accompanying the sliding of the movable contact 5 can be suppressed. For this reason, the contact between the movable contact 5 and the fixed contacts 3 and 4 is stabilized, arc discharge between the contacts can be suppressed, and the number of parts of the movable contact 5 and the number of processing steps can be reduced. And the contact with the movable contact 5 and the fixed contacts 3 and 4 is stabilized, and the arc discharge between contacts can be suppressed.

また、接点圧スプリング８を２つにしたことで、スプリング１つ当たりの荷重を小さくすることができる。これによって、スプリングが１つの場合よりも、スプリングの全長を短縮できるため、接点と接点圧スプリング８を収容するハウジング２を小型化することができる。そして、ハウジング２に用いられる高価な耐熱性の樹脂材料の使用量を削減でき、電磁継電器１の製造コストを低減できる。
［実施例２］ Further, since the number of contact pressure springs 8 is two, the load per spring can be reduced. Accordingly, since the total length of the spring can be shortened as compared with the case of one spring, the housing 2 that accommodates the contact and the contact pressure spring 8 can be downsized. And the usage-amount of the expensive heat resistant resin material used for the housing 2 can be reduced, and the manufacturing cost of the electromagnetic relay 1 can be reduced.
[Example 2]

本発明の実施例２の電磁継電器１について図３を用いて説明する。   The electromagnetic relay 1 of Example 2 of this invention is demonstrated using FIG.

本例の電磁継電器１の可動接点５には、固定接点３、４との接触面に対して背面側に内径側スプリング８ａの位置を規制する凸部５ａが形成されている。これによって、可動接点５が摺動をしても内径側スプリング８ａとの当接位置がずれることはなく、最適な位置に維持することができる。そして、可動接点５と固定接点３、４との接触がより安定し、接点間のアーク放電を抑制できる。また、可動接点５の組み付けにおいて、内径側スプリング８ａを押し縮めるとき、スプリングの中心が可動接点５の中心とずれることがなく、組み付け不良を防止することができる。   The movable contact 5 of the electromagnetic relay 1 of the present example is formed with a convex portion 5a that regulates the position of the inner diameter side spring 8a on the back side with respect to the contact surface with the fixed contacts 3 and 4. Thereby, even if the movable contact 5 slides, the contact position with the inner diameter side spring 8a is not shifted and can be maintained at the optimum position. And the contact with the movable contact 5 and the fixed contacts 3 and 4 is stabilized more, and the arc discharge between contacts can be suppressed. Further, in assembling the movable contact 5, when the inner diameter side spring 8 a is pressed and contracted, the center of the spring is not shifted from the center of the movable contact 5, and assembly failure can be prevented.

その他の構成、効果については実施例１と同様である。   Other configurations and effects are the same as those in the first embodiment.

コイル非通電時における電磁継電器の断面図である（実施例１）。It is sectional drawing of the electromagnetic relay at the time of coil non-energization (Example 1). コイル通電時における電磁継電器の断面図である（実施例１）。(Example 1) which is sectional drawing of the electromagnetic relay at the time of coil energization. コイル非通電時における電磁継電器の断面図である（実施例２）。(Example 2) which is sectional drawing of the electromagnetic relay at the time of coil non-energization. 電磁継電器が用いられるスタータの電気回路図である。It is an electric circuit diagram of a starter in which an electromagnetic relay is used. 電磁継電器とスタータのメインスイッチに対するＥＣＵ２４の通電制御を示すタイムチャートである。It is a time chart which shows the electricity supply control of ECU24 with respect to the electromagnetic relay and the main switch of a starter.

符号の説明Explanation of symbols

１ 電磁継電器
２ ハウジング
２ｂ 可動接点収容部
２ｃ 突起部
３ 固定接点
４ 固定接点
５ 可動接点
５ａ 凸部
６ リターンスプリング（本発明の第１弾性部材）
７ 電磁ソレノイド
８ 接点圧スプリング（本発明の第２弾性部材）
８ａ 内径側スプリング
８ｂ 外径側スプリング DESCRIPTION OF SYMBOLS 1 Electromagnetic relay 2 Housing 2b Movable contact accommodating part 2c Protrusion part 3 Fixed contact 4 Fixed contact 5 Movable contact 5a Protrusion 6 Return spring (1st elastic member of this invention)
7 Electromagnetic solenoid 8 Contact pressure spring (second elastic member of the present invention)
8a Inner diameter side spring 8b Outer diameter side spring

Claims (4)

ハウジング内に固定される固定接点と、
前記固定接点に対して相対変位可能に支持された可動接点と、
前記可動接点が前記固定接点から遠ざかる方向に弾性力を付与して前記可動接点を前記固定接点から離れた位置に保持する第１弾性部材と、
通電により前記第１弾性部材の弾性力に抗する磁力を発揮して前記可動接点を前記固定接点に接触させる電磁ソレノイドと、
前記可動接点を前記固定接点方向に付勢する第２弾性部材と、を備える電磁継電器において、
前記第２弾性部材は、直径の異なる内径側スプリングと外径側スプリングを有し、前記内径側スプリングは前記外径側スプリングの内側の空間に配置され、
前記内径側スプリングは前記固定接点と前記可動接点とが接触する接触面の接触範囲における径方向中心位置よりも内径側の前記接触範囲で前記可動接点を付勢し、前記外径側スプリングは前記接触面の接触範囲における径方向中心位置よりも外径側の前記接触範囲で前記可動接点を付勢することを特徴とする電磁継電器。 A fixed contact fixed in the housing;
A movable contact supported so as to be capable of relative displacement with respect to the fixed contact;
A first elastic member that applies an elastic force in a direction in which the movable contact moves away from the fixed contact to hold the movable contact at a position away from the fixed contact;
An electromagnetic solenoid that exerts a magnetic force that resists the elastic force of the first elastic member by energization to bring the movable contact into contact with the fixed contact;
An electromagnetic relay comprising: a second elastic member that biases the movable contact toward the fixed contact;
The second elastic member has an inner diameter side spring and an outer diameter side spring having different diameters, and the inner diameter side spring is arranged in a space inside the outer diameter side spring ,
The inner diameter side spring biases the movable contact in the contact range on the inner diameter side with respect to the radial center position in the contact range of the contact surface where the fixed contact and the movable contact contact, and the outer diameter side spring An electromagnetic relay , wherein the movable contact is urged in the contact range on the outer diameter side of the radial center position in the contact range of the contact surface . 請求項１に記載の電磁継電器において、
前記内径側スプリングは、前記ハウジング底面に設けられた突起部の外径によって位置決めされ、前記外径側スプリングは、前記ハウジングに設けられた可動接点収容部の内側面によって位置決めされていることを特徴とする電磁継電器。 The electromagnetic relay according to claim 1,
The inner diameter side spring is positioned by an outer diameter of a protrusion provided on the bottom surface of the housing, and the outer diameter side spring is positioned by an inner surface of a movable contact accommodating part provided on the housing. Electromagnetic relay. 請求項１〜２に記載の何れかの電磁継電器において、
前記内径側スプリングは、前記可動接点の前記接触面に対して背面側に形成された凸部によって位置決めされていることを特徴とする電磁継電器。 In the electromagnetic relay in any one of Claims 1-2 ,
The electromagnetic relay according to claim 1, wherein the inner diameter side spring is positioned by a convex portion formed on the back side with respect to the contact surface of the movable contact . 請求項１〜３に記載の何れかの電磁継電器において、
前記可動接点は、前記可動接点収容部の内側面によって位置を案内されていることを特徴とする電磁継電器。 In the electromagnetic relay in any one of Claims 1-3,
The position of the movable contact is guided by an inner surface of the movable contact accommodating portion .
JP2008332527A 2008-12-26 2008-12-26 Electromagnetic relay Expired - Fee Related JP5218036B2 (en)

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DE102009060820A DE102009060820A1 (en) 2008-12-26 2009-12-28 Electromagnetic relay
FR0906368A FR2940719B1 (en) 2008-12-26 2009-12-28 ELECTROMAGNETIC RELAY

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US6923152B2 (en) * 2002-12-10 2005-08-02 Mitsubishi Denki Kabushiki Kaisha Engine starter
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