JPH0636636A - Contact opening/closing device - Google Patents
Contact opening/closing deviceInfo
- Publication number
- JPH0636636A JPH0636636A JP19412492A JP19412492A JPH0636636A JP H0636636 A JPH0636636 A JP H0636636A JP 19412492 A JP19412492 A JP 19412492A JP 19412492 A JP19412492 A JP 19412492A JP H0636636 A JPH0636636 A JP H0636636A
- Authority
- JP
- Japan
- Prior art keywords
- contact
- armature
- magnetic
- electromagnet
- movable
- 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
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、コンデンサ負荷やラン
プ負荷等の突入電流が大きい負荷を開閉する接点開閉装
置、特にそのような負荷を開閉する電磁リレー用として
好適な接点開閉装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a contact switchgear for opening and closing a load having a large inrush current such as a capacitor load or a lamp load, and more particularly to a contact switchgear suitable for an electromagnetic relay opening and closing such a load.
【０００２】[0002]
【従来の技術】一般的に、電磁リレーに用いられる接点
開閉装置は、固定接点に接離する可動接点を設けた可動
接点板を電磁石により駆動して接点開閉動作を行う。2. Description of the Related Art Generally, a contact opening / closing device used in an electromagnetic relay performs a contact opening / closing operation by driving a movable contact plate provided with a movable contact which comes in contact with and separates from a fixed contact by an electromagnet.
【０００３】ところで、コンデンサ負荷やランプ負荷等
を開閉した場合、大きな突入電流が流れ、それによって
発生するアークにより接点溶着が起こるときがある。こ
れを防止するために、接点材料にタングステンのような
耐溶着性能の良好なものを用いることが考えられる。し
かしこの場合、タングステンのような材料は抵抗値が大
きいので接点閉成状態における温度上昇が大きくなる。By the way, when a capacitor load, a lamp load, etc. are opened and closed, a large rush current flows, and the arc generated thereby sometimes causes contact welding. In order to prevent this, it is conceivable to use, as the contact material, a material having good welding resistance such as tungsten. However, in this case, since a material such as tungsten has a large resistance value, the temperature rise in the contact closed state becomes large.
【０００４】そこで、耐溶着性能の良好な接点対と接触
抵抗性能の良好な接点対とを有してこれらが並列接続関
係にあり、それぞれの可動側接点を設けた接点板が電磁
石の可動部材、すなわちアマチヤを保持した可動枠によ
って駆動され、かつ耐溶着性能の良好な接点対は接点閉
成動作時には先に接触し、接点開成動作時には後に開離
し、従って接点閉成状態では接触抵抗性能の良好な接点
対が接触している接点開閉装置が提案されている (例え
ば、実公昭51-23863号、実公昭55-42341号、特開昭61-
233919号、特開昭62-71137号、特開昭62-71138号等) 。Therefore, a contact pair having a good welding resistance and a contact pair having a good contact resistance are in parallel connection, and the contact plates provided with the movable contacts are movable members of the electromagnet. That is, a contact pair that is driven by a movable frame holding an armature and has good welding resistance contacts first during contact closing operation, and then separates after contact opening operation. A contact switchgear in which a good contact pair is in contact has been proposed (for example, JP-B-51-23863, JP-B-55-42341, JP-A-61-
233919, JP-A-62-71137, JP-A-62-71138, etc.).
【０００５】[0005]
【発明が解決しようとする課題】上記した接点開閉装置
にあっては、耐溶着性能の良好な接点対が投入されて次
に接触抵抗性能の良好な接点対が投入されるまでの投入
時間差があまり大きくとれない。In the above contact switching device, there is a difference in the closing time from when a contact pair having good welding resistance is made and then a contact pair having good contact resistance is made next. I can't get too big.
【０００６】すなわち上記した接点開閉装置を双安定電
磁石により駆動した場合のばね (可動接点板) 負荷と吸
引力の特性図は、図11に示すようになる。図において、
横軸は電磁石の可動部材のストローク、縦軸はばね負荷
と吸引力であり、FBはばね負荷、FSはセット (投入) 時
吸引力、FRはリセット (遮断) 時吸引力、F0は無励磁時
吸引力である。図11から明らかなように、セット時のば
ね負荷は、ストロークx1地点で耐溶着性能の良好な接点
対が投入されて増大し、ストロークx2地点で接触抵抗性
能の良好な接点対が投入されてさらに増大する。That is, FIG. 11 shows a characteristic diagram of the load (load) of the spring (movable contact plate) and the attraction force when the above-mentioned contact switching device is driven by a bistable electromagnet. In the figure,
The horizontal axis is the stroke of the movable member of the electromagnet, the vertical axis is the spring load and the attraction force, FB is the spring load, FS is the attraction force when set (closed), FR is the attraction force when reset (cut off), and F0 is non-excitation. When it is suction power. As is clear from Fig. 11, the spring load at the time of setting increases at the stroke x1 with the contact pair with good welding resistance being turned on, and at the stroke x2 with the contact pair having good contact resistance being turned on. Further increase.
【０００７】そして、接点の動作特性は図12に示すよう
になる。図において、横軸は時間、縦軸は電磁石の可動
部材の変位M とその速度V である。図12から明らかなよ
うに、時間t1時点で耐溶着性能の良好な接点対が投入さ
れ、時間t2時点で接触抵抗性能の良好な接点対が投入さ
れる。そして、耐溶着性能の良好な接点対が投入されて
次に接触抵抗性能の良好な接点対が投入されるまでの変
位 (ストローク) 差Δx2-1は元々小さく (図11参照) 、
そのうえ電磁石の可動部材の速度V は十分大きくなって
いるため、耐溶着性能の良好な接点対が投入されて次に
接触抵抗性能の良好な接点対が投入されるまでの投入時
間差Δt2-1はあまり大きくとれないのである。その結
果、突入電流が流れているときに接触抵抗性能の良好な
接点対が投入される危険性があり、そのような場合には
接点溶着が発生することとなる。The operating characteristics of the contacts are as shown in FIG. In the figure, the horizontal axis represents time, and the vertical axis represents the displacement M of the movable member of the electromagnet and its velocity V. As is clear from FIG. 12, the contact pair with good welding resistance is turned on at time t1, and the contact pair with good contact resistance is turned on at time t2. The displacement (stroke) difference Δx 2-1 from when a contact pair with good welding resistance is turned on until the next contact pair with good contact resistance is turned on is originally small (see Fig. 11),
Moreover, since the velocity V of the movable member of the electromagnet is sufficiently high, the time difference Δt 2-1 between the closing of a contact pair with good welding resistance and the next contact with good contact resistance performance Cannot be so large. As a result, there is a risk that a contact pair having good contact resistance performance may be turned on when an inrush current is flowing, and in such a case, contact welding will occur.
【０００８】また、電磁石の可動部材、すなわちアマチ
ヤを保持した可動枠の速度V が大きいため、これが磁性
部材、例えば固定鉄心の磁極面に衝突したときの衝突音
も大きくなる。Further, since the velocity V of the movable member of the electromagnet, that is, the movable frame holding the armature is high, the collision noise when the magnetic member collides with the magnetic member, for example, the magnetic pole surface of the fixed iron core, becomes large.
【０００９】図12におけるCaは耐溶着性能の良好な接点
対の開閉状態、Cbは接触抵抗性能の良好な接点対の開閉
状態、Ipは突入電流を示している。In FIG. 12, Ca represents the open / closed state of the contact pair having a good welding resistance, Cb represents the open / closed state of the contact pair having a good contact resistance performance, and Ip represents the inrush current.
【００１０】本発明は、かかる事由に鑑みてなしたもの
で、その目的とするところは、耐溶着性能がさらに高め
られるとともに、電磁石の衝突音が低減できる接点開閉
装置を提供するにある。The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a contact opening / closing device capable of further improving the welding resistance and reducing the collision noise of an electromagnet.
【００１１】[0011]
【課題を解決するための手段】かかる課題を解決するた
めに本発明の接点開閉装置は、コイルを巻装するととも
に磁極面を有した磁性部材と、磁極面に吸引離反する接
極子を有したアマチヤと、アマチヤを保持する可動枠
と、磁性部材とアマチヤを含む磁気回路に介挿された永
久磁石と、を備えた電磁石を有し、耐溶着性能の良好な
接点対と接触抵抗性能の良好な接点対とを有してこれら
が並列接続関係にあり、それぞれの可動側接点を設けた
可動接点板が電磁石の可動枠によって駆動される接点開
閉装置において、前記電磁石は、前記磁極面と接極子間
に永久磁石の磁力により保持されるものであって、接極
子が磁極面に吸引されるとき接極子によって永久磁石に
よる保持力に抗して移動せしめられ、かつ移動せしめら
れたとき接極子と磁極面の接触を阻害しない磁性緩衝体
を設けた構成としている。In order to solve such a problem, a contact opening / closing device of the present invention has a magnetic member having a magnetic pole surface wound with a coil and an armature attracted to and separated from the magnetic pole surface. It has an electromagnet with an armature, a movable frame that holds the armature, and a permanent magnet that is inserted in the magnetic circuit that includes the magnetic member and the armature, and has a good contact resistance with good welding resistance and good contact resistance. In a contact switching device in which a movable contact plate provided with movable contact points is driven by a movable frame of an electromagnet, the electromagnet is in contact with the magnetic pole surface. It is held between the poles by the magnetic force of the permanent magnet, and is moved by the armature against the holding force of the permanent magnet when the armature is attracted to the magnetic pole surface, and when it is moved, the armature. And porcelain It has a configuration in which a magnetic cushion that does not inhibit the contact surface.
【００１２】[0012]
【作用】この構成によれば、電磁石のアマチヤは永久磁
石の磁力により保持された磁性緩衝体を移動させること
によってその動作速度が低減し、従って耐溶着性能の良
好な接点対が投入されて次に接触抵抗性能の良好な接点
対が投入されるまでの投入時間差Δt2-1が大きくとれる
とともに、アマチヤ固定鉄心の磁極面に衝突したときの
衝突音も小さくなる。According to this structure, the operation speed of the armature of the electromagnet is reduced by moving the magnetic buffer held by the magnetic force of the permanent magnet, and therefore the contact pair having good welding resistance is turned on and In addition, the closing time difference Δt 2-1 until a contact pair having good contact resistance performance is closed can be made large, and the collision noise when the magnetic pole surface of the armature fixed iron core collides is reduced.
【００１３】[0013]
【実施例】以下、電磁リレーに適用した本発明の一実施
例を図１乃至図６に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention applied to an electromagnetic relay will be described below with reference to FIGS.
【００１４】B は電磁リレーR の基台で、後述する接点
開閉装置、すなわち電磁石E や耐溶着性能の良好な接点
対10と接触抵抗性能の良好な接点対20の各部材を取着配
設している。C は基台B とともにハウジングを形成する
ケースである。B is a base of the electromagnetic relay R, and a contact switchgear described later, that is, the electromagnet E, the contact pair 10 having good welding resistance and the contact pair 20 having good contact resistance are attached and arranged. is doing. C is a case that forms a housing together with the base B.
【００１５】この電磁石E は、コイル4 を巻装した磁性
部材1 、永久磁石7 を含むアマチヤ6 を保持する可動枠
8 、そして磁性緩衝体9 を主要構成部材としている。This electromagnet E is a movable frame for holding a magnetic member 1 wound with a coil 4 and an armature 6 including a permanent magnet 7.
8 and the magnetic buffer 9 are the main constituent members.
【００１６】磁性部材1 は、ヨーク2 と固定鉄心3 より
なる。ヨーク2 は、平板状の基片2aと、その一端を略直
角に折曲してなる固着片2bと、その他端側の両側部を略
直角に折曲してなる対向脚片2c,2c を有する。固定鉄心
3 は、磁性板材製であって狭幅部3aと広幅部3cにて略Ｔ
字状をなしており、広幅部3cが後述のアマチヤに対する
磁極面となる。この広幅部 (磁極面)3c は、その先端側
の両面を所定深さに切除した形状である緩衝体用凹所3
d,3d が形成されている。この緩衝体用凹所3d,3d に
は、後述する磁性緩衝体が位置する。The magnetic member 1 comprises a yoke 2 and a fixed iron core 3. The yoke 2 includes a flat plate-shaped base piece 2a, a fixed piece 2b formed by bending one end thereof at a substantially right angle, and opposite leg pieces 2c, 2c formed by bending both side portions on the other end side at a substantially right angle. Have. Fixed iron core
Numeral 3 is made of a magnetic plate material, and the narrow portion 3a and the wide portion 3c are substantially T
It has a character shape, and the wide portion 3c serves as a magnetic pole surface for an armature described later. The wide width portion (magnetic pole surface) 3c has a buffer body recess 3 formed by cutting both front end sides to a predetermined depth.
d, 3d are formed. A magnetic buffer, which will be described later, is located in the buffer body recesses 3d, 3d.
【００１７】コイル4 は、コイル枠5 に巻回され、その
コイル枠5 の内孔5aに固定鉄心3 の狭幅部3aが挿通す
る。コイル枠5 は、内孔5aを設けた巻胴部の両端に鍔部
5b,5cを有する。一方の鍔部5bには、コイル端子4a,4a,4
aを貫通保持するとともに、上方端面に後述する可動枠
の回動支点となる軸部5dが形成してある。The coil 4 is wound around the coil frame 5, and the narrow portion 3a of the fixed iron core 3 is inserted into the inner hole 5a of the coil frame 5. Coil frame 5 has collar parts at both ends of the winding drum part with inner hole 5a.
It has 5b and 5c. One of the collars 5b has coil terminals 4a, 4a, 4
A shaft portion 5d is formed on the upper end face of the movable frame, which is a fulcrum of rotation of the movable frame as will be described later, while holding a through.
【００１８】磁性部材1 は、コイル枠5 の内孔5aに挿通
した固定鉄心3 の狭幅部3aの端部をヨーク2 の固着片2b
に固着することにより組立てられる。In the magnetic member 1, the end of the narrow portion 3a of the fixed iron core 3 which is inserted into the inner hole 5a of the coil frame 5 is fixed to the fixing piece 2b of the yoke 2.
It is assembled by fixing to.
【００１９】アマチヤ6 は、２個の接極子6c,6c とこれ
らに挟持された永久磁石7 とよりコ字状をなして可動枠
8 に保持される。可動枠8 は、樹脂製であり、固定鉄心
3 の長さに対応する基部8aを有し、一端側にコイル枠5
の軸部5dに嵌合する軸受部8d、中間部両側に接点板駆動
用の駆動部8b,8c 、他端側にアマチヤ6 を保持するため
の保持部8eを形成している。一方の駆動部8bは、後述す
る耐溶着性能の良好な接点対10の可動接点板に対し、リ
フトオフ形式の第１駆動部P1とフレキシャー形式の第２
駆動部P2が可動接点板を挟んで所定間隙でもって対向す
るように設けてある。他方の駆動部8cは、後述する接触
抵抗性能の良好な接点対20の可動接点板に対向してい
る。従って可動枠8 の軸受部8dをコイル枠5 の軸部5dに
嵌合させると、各接点対10,20 に対しては前述の通りで
あり、アマチヤ6 の接極子6c,6c の内方面が固定鉄心3
の広幅部 (磁極面)3c に対面し、コイル4 の励磁を制御
することにより接極子6c,6c が広幅部 (磁極面)3c と吸
引離反する。The armature 6 has a U-shaped movable frame composed of two armatures 6c, 6c and a permanent magnet 7 sandwiched between them.
Holds at 8. The movable frame 8 is made of resin and has a fixed iron core.
3 has a base 8a corresponding to the length of 3 and coil frame 5
A bearing portion 8d fitted to the shaft portion 5d, drive portions 8b and 8c for driving the contact plate on both sides of the intermediate portion, and a holding portion 8e for holding the armature 6 on the other end side are formed. One of the drive parts 8b has a lift-off type first drive part P1 and a flexure type second drive part P1 with respect to a movable contact plate of a contact pair 10 having good welding resistance, which will be described later.
The drive unit P2 is provided so as to face the movable contact plate with a predetermined gap therebetween. The other drive unit 8c faces the movable contact plate of the contact pair 20 having good contact resistance performance, which will be described later. Therefore, when the bearing part 8d of the movable frame 8 is fitted to the shaft part 5d of the coil frame 5, the contact points 10 and 20 are as described above, and the inner surfaces of the armatures 6c and 6c of the armature 6 are Fixed iron core 3
Of the armature 6c, 6c is opposed to the wide portion (pole surface) 3c of the coil and the excitation of the coil 4 is controlled so that the armatures 6c and 6c are attracted and separated from the wide portion (pole surface) 3c.
【００２０】磁性緩衝体9 は、図４に示すように、磁性
板材製であり、対向片9c,9c と連結片9aにてコ字状をな
している。磁性緩衝体9 の厚さと緩衝体用凹所3d,3d の
深さの関係は重要であって、緩衝体用凹所3d,3d の深さ
が磁性緩衝体9 の厚さと同等以上であるようにする。ま
た、対向片9c,9c は、その内法は緩衝体用凹所3d,3dに
挟まれた広幅部 (磁極面)3c の厚さより大きく、その外
法はアマチヤ6 の接極子6c,6c 間より小さく設定する。
この磁性緩衝体9 は、いずれかの対向片9cが磁極面3cと
接極子6c間に永久磁石7 の磁力により保持される。As shown in FIG. 4, the magnetic buffer body 9 is made of a magnetic plate material, and is formed in a U-shape by the facing pieces 9c, 9c and the connecting piece 9a. The relationship between the thickness of the magnetic buffer 9 and the depth of the buffer recesses 3d, 3d is important, and the depth of the buffer recesses 3d, 3d should be equal to or greater than the thickness of the magnetic buffer 9. To Also, the opposing pieces 9c, 9c are larger than the thickness of the wide portion (pole surface) 3c sandwiched between the buffer recesses 3d, 3d, and the outer method is between the armatures 6c, 6c of the armature 6. Set smaller.
In the magnetic buffer body 9, one of the facing pieces 9c is held between the magnetic pole surface 3c and the armature 6c by the magnetic force of the permanent magnet 7.
【００２１】このような電磁石E は、コイル端子4a,4a,
4aを基台B に貫通固定することにより、その略中央に取
着される。Such an electromagnet E has coil terminals 4a, 4a,
The 4a is fixed to the base B by penetrating it so that it is attached to the approximate center thereof.
【００２２】耐溶着性能の良好な接点対10は、タングス
テンのような材料にて形成された固定接点11と可動接点
12よりなる。固定接点11は、固定接点端子13に固着さ
れ、この固定接点端子13は基台B に貫通固定される。可
動接点12は、可動接点端子15に固着された可動接点板14
に固着され、この可動接点端子15も基台B に貫通固定さ
れる。The contact pair 10 having good welding resistance is composed of a fixed contact 11 and a movable contact formed of a material such as tungsten.
Consists of 12. The fixed contact 11 is fixed to a fixed contact terminal 13, and the fixed contact terminal 13 is fixed through the base B. The movable contact 12 has a movable contact plate 14 fixed to the movable contact terminal 15.
The movable contact terminal 15 is also fixed to the base B through.
【００２３】この接点対10は、接点開成 (開極) 動作の
ときはリフトオフ形式であって駆動部8bの第１駆動部P1
により押し上げられ、接点閉成 (投入) 動作のときはフ
レキシャー形式であって駆動部8bの第２駆動部P2により
押し下げられるように駆動される。The contact pair 10 is of a lift-off type when the contact is opened (opening), and is the first drive portion P1 of the drive portion 8b.
It is driven by the second drive unit P2 of the drive unit 8b in a flexure type during contact closing (closing) operation.
【００２４】接触抵抗性能の良好な接点対20は、銀合金
のような材料にて形成された固定接点21と可動接点22よ
りなる。固定接点21は、固定接点端子23に固着され、こ
の固定接点端子23は基台B に貫通固定される。可動接点
22は、可動接点端子25に固着された可動接点板24に固着
され、この可動接点端子25もやはり基台B に貫通固定さ
れる。The contact pair 20 having good contact resistance performance is composed of a fixed contact 21 and a movable contact 22 formed of a material such as a silver alloy. The fixed contact 21 is fixed to a fixed contact terminal 23, and the fixed contact terminal 23 is fixed through the base B. Moving contact
22 is fixed to a movable contact plate 24 fixed to a movable contact terminal 25, and this movable contact terminal 25 is also fixed to the base B through.
【００２５】この接点対20は、フレキシャー形式、すな
わち常開形式であり、他方の駆動部8cに押圧駆動されな
いときは開成状態にある。なお、この実施例の他方の駆
動部8cは、可動接点板24を隙間を介在させて挟むような
形状にしてリフトオフ形式の機能も持たせているが、こ
れは必須の条件ではない。This contact pair 20 is of a flexure type, that is, a normally open type, and is in an open state when it is not pressed by the other drive portion 8c. The other drive unit 8c of this embodiment is also shaped to sandwich the movable contact plate 24 with a gap therebetween and has a lift-off type function, but this is not an essential condition.
【００２６】これら両接点対10,20 は、並列接続関係に
あり、それぞれの可動側接点12,22を設けた可動接点板1
4,24 が電磁石E によって駆動され、かつ耐溶着性能の
良好な接点対10は接点閉成動作時には先に接触し、接点
開成動作時には後に開離するよう設定してある。The two contact pairs 10 and 20 are connected in parallel, and the movable contact plate 1 having the movable contacts 12 and 22 is provided.
The contact pairs 10 and 4, 24, which are driven by the electromagnet E and have good welding resistance, are set to come into contact first during the contact closing operation and to open after the contact opening operation.
【００２７】かかる接点開閉装置における電磁石E の磁
性緩衝体9 の作用について、アマチヤ6 の動作を示す図
５(a) 乃至(c) により説明する。(a) は、アマチヤ6 の
左方の接極子6cが固定鉄心3 の磁極面3cに吸引されてい
る状態である。この場合、コイル4 が励磁されていなく
ても永久磁石7 の磁力によってその状態が保持される。
また、磁性緩衝体9 は、左方の対向片9cが左方の緩衝体
用凹所3d内に位置してやはり永久磁石の磁力により保持
されている。そして左方の対向片9cが左方の接極子6cと
固定鉄心3 の磁極面3c間に介在しているが、接極子6cと
磁極面3cの直接の接触を阻害することはない。The operation of the magnetic buffer 9 of the electromagnet E in the contact switching device will be described with reference to FIGS. 5 (a) to 5 (c) showing the operation of the armature 6. (a) is a state in which the armature 6c on the left side of the armature 6 is attracted to the magnetic pole surface 3c of the fixed iron core 3. In this case, even if the coil 4 is not excited, that state is maintained by the magnetic force of the permanent magnet 7.
Further, in the magnetic buffer 9, the left facing piece 9c is located in the buffer recess 3d on the left and is also held by the magnetic force of the permanent magnet. The left facing piece 9c is interposed between the left armature 6c and the magnetic pole surface 3c of the fixed iron core 3, but does not hinder the direct contact between the armature 6c and the magnetic pole surface 3c.
【００２８】この状態で、固定鉄心3 に流れる永久磁石
7 の磁束を打ち消す方向の磁束を流すべくコイル4 を励
磁すると、コイル4 による磁束は右方の接極子6cにも流
れてそれを吸引し、アマチヤ6 は矢符方向に移動し始め
る。そして(b) に示すように、右方の接極子6cが右方の
対向片9cに当接する。従ってアマチヤ6 は、永久磁石7
の保持力によって保持されている磁性緩衝体9 を、その
保持力に抗して移動させながら移動し、(c) に示すよう
に、右方の接極子6cが固定鉄心3 の磁極面3cに吸引され
る。In this state, the permanent magnet flowing through the fixed iron core 3
When the coil 4 is excited to flow the magnetic flux in the direction of canceling the magnetic flux of 7, the magnetic flux by the coil 4 also flows to the right armature 6c and attracts it, and the armature 6 starts moving in the arrow direction. Then, as shown in (b), the right armature 6c comes into contact with the right facing piece 9c. Therefore, Amatya 6 is a permanent magnet 7
The magnetic buffer body 9 held by the holding force of is moved while moving against the holding force, and as shown in (c), the armature 6c on the right side contacts the magnetic pole surface 3c of the fixed iron core 3. Sucked.
【００２９】(c) の状態でコイル4 が励磁されなくなっ
ても、アマチヤ6 は永久磁石7 の磁力によってその状態
が保持され、また磁性緩衝体9 も右方の対向片9cが右方
の緩衝体用凹所3d内に位置してやはり永久磁石の磁力に
より保持されている。そして右方の対向片9cが右方の接
極子6cと固定鉄心3 の磁極面3c間に介在しているが、接
極子6cと磁極面3cの直接の接触を阻害することはないの
である。Even when the coil 4 is no longer excited in the state of (c), the state of the armature 6 is maintained by the magnetic force of the permanent magnet 7, and the magnetic buffer body 9 has the right facing piece 9c for buffering the right side. It is located inside the body recess 3d and is also held by the magnetic force of the permanent magnet. The right facing piece 9c is interposed between the right armature 6c and the magnetic pole surface 3c of the fixed iron core 3, but does not hinder the direct contact between the armature 6c and the magnetic pole surface 3c.
【００３０】従って各接点対10,20 の各可動接点板14,2
4 は、永久磁石7 を含むアマチヤ6を保持した可動枠8
の駆動部8b,8c により駆動されて接点開閉動作を行う。
このような動作におけるアマチヤ6 は、その移動速度を
低減させられて磁極面3cに衝突するので、耐溶着性能の
良好な接点対が投入されて次に接触抵抗性能の良好な接
点対が投入されるまでの投入時間差Δt2-1が大きくと
れ、しかもその際の衝突音が低減できるのである。Therefore, each movable contact plate 14, 2 of each contact pair 10, 20
4 is a movable frame 8 holding an armature 6 including a permanent magnet 7.
It is driven by the drive units 8b and 8c of the above to perform the contact opening / closing operation.
Since the moving speed of the armature 6 in such an operation is reduced and it collides with the magnetic pole surface 3c, a contact pair with good welding resistance is turned on, and then a contact pair with good contact resistance is turned on. The difference Δt 2-1 in the charging time until the start of the collision can be made large, and the collision noise at that time can be reduced.
【００３１】換言すれば、磁性緩衝体9 は、接極子が磁
極面に吸引されるとき接極子によって永久磁石による保
持力に抗して移動せしめられ、かつ移動せしめられたと
き接極子と磁極面の接触を阻害しないよう作用するので
ある。このことは、前述した作用に加え、衝突音低減の
ために固定鉄心に緩衝部材を貼りつけたものに比して、
吸引力特性図における本来の全ストロークが減少するこ
とがなく、アマチヤを保持するための各吸引力が小さく
なることがない、という作用をもたらす。In other words, the magnetic buffer 9 is moved by the armature against the holding force of the permanent magnet when the armature is attracted to the magnetic pole surface, and when it is moved, the armature and the magnetic pole surface. It does not interfere with the contact of the. This means that, in addition to the above-mentioned action, compared to a fixed core with a cushioning member attached to reduce collision noise,
This brings about the effect that the original total stroke in the attraction force characteristic diagram does not decrease and each attraction force for holding the armature does not become small.
【００３２】(c) の状態からアマチヤ6 を逆方向に移動
させるには、先の場合とは逆方向の磁束が流れるように
コイル4 を励磁すればよく、磁性緩衝体9 が先の場合と
同様に作用してアマチヤ4 は(a）の状態に戻る。In order to move the armature 6 in the reverse direction from the state of (c), it suffices to excite the coil 4 so that the magnetic flux in the opposite direction to that in the previous case flows, and the case where the magnetic buffer 9 is the previous case. By the same action, Amatya 4 returns to the state of (a).
【００３３】さらに詳しく、接点等の動作特性を図12に
示した従来例のものと対比させると、図６に示すように
なる。図において、横軸は時間、縦軸は電磁石E の可動
部材の変位M とその速度V である。図６から明らかなよ
うに、時間t1時点で耐溶着性能の良好な接点対10が投入
され、時間t2時点で接極子6cが磁性緩衝体9 に当接し、
そして時間t3時点で接触抵抗性能の良好な接点対20が投
入される。従って、耐溶着性能の良好な接点対10が投入
されて次に接触抵抗性能の良好な接点対20が投入される
までの変位 (ストローク) 差は従来のものに比して大さ
く、そのうえ電磁石の可動部材の速度V は小さいので、
前述した通り、耐溶着性能の良好な接点対10が投入され
て次に接触抵抗性能の良好な接点対20が投入されるまで
の投入時間差Δt2-1は大きくとれるのである。その結
果、突入電流が流れているときに接触抵抗性能の良好な
接点対20が投入される危険性は極めて減り、接点溶着は
発生しにくくなる。また、当然にしてアマチヤ6 の衝突
音も小さくなる。More specifically, when the operating characteristics of the contacts and the like are compared with those of the conventional example shown in FIG. 12, it becomes as shown in FIG. In the figure, the horizontal axis represents time, and the vertical axis represents the displacement M of the movable member of the electromagnet E and its velocity V. As is apparent from FIG. 6, the contact pair 10 having good welding resistance is turned on at the time t1, and the armature 6c abuts on the magnetic buffer 9 at the time t2.
Then, at time t3, the contact pair 20 having good contact resistance performance is turned on. Therefore, the displacement (stroke) difference between the contact pair 10 with good welding resistance performance and the contact pair 20 with good contact resistance performance next is larger than that of the conventional one. Since the velocity V of the movable member of is small,
As described above, the difference Δt 2-1 in making time from when the contact pair 10 having good welding resistance performance is made until the contact pair 20 having good contact resistance performance is made next can be made large. As a result, reduced extremely danger of contact resistance good contact pair of potential 20 is turned on when the inrush current is flowing, contact welding is less likely to occur. Naturally, the collision noise of Amatya 6 is also reduced.
【００３４】図６におけるCaは耐溶着性能の良好な接点
対の開閉状態、Cbは接触抵抗性能の良好な接点対の開閉
状態、Ipは突入電流を示している。また、可動部材の変
位Mの曲線における(a)(b)(c) は図５のそれに対応して
いる。In FIG. 6, Ca represents the open / closed state of the contact pair having good welding resistance, Cb represents the open / closed state of the contact pair having good contact resistance, and Ip represents the inrush current. Further, (a), (b) and (c) in the curve of the displacement M of the movable member correspond to those in FIG.
【００３５】図７は、磁性緩衝体9 と固定鉄心3 の磁極
面3cの変形例である。このものは、緩衝体用凹所3d,3d
に挟まれた広幅部 (磁極面)3c の先端側中央に貫通凹所
3eを設け、磁性緩衝体9 の連結片9aを細幅にして貫通凹
所3eに位置するようにしている。このものは、固定鉄心
3 の長手方向に対応する電磁石装置の長さを短くでき、
しかも磁性緩衝体9 の保持がより確実になる。FIG. 7 shows a modification of the magnetic buffer 9 and the magnetic pole surface 3c of the fixed iron core 3. This one is the recess for buffer 3d, 3d
A wide recess (pole face) 3c sandwiched between
3e is provided, and the connecting piece 9a of the magnetic buffer 9 is narrowed so as to be located in the through recess 3e. This is a fixed iron core
The length of the electromagnet device corresponding to the longitudinal direction of 3 can be shortened,
Moreover, the magnetic buffer 9 can be held more reliably.
【００３６】図８は、同じく別の変形例である。このも
のは、緩衝体用凹所3d,3d を広幅部(磁極面)3c の片側
(図において、上方側) にのみ設け、さらにその中央に
貫通凹所3eを設け、磁性緩衝体9 の細幅の連結片9aを貫
通凹所3eに位置するようにしている。FIG. 8 shows another modified example. This is because the buffer recesses 3d and 3d are formed on one side of the wide part (pole face) 3c.
It is provided only on the upper side (in the figure), and a through recess 3e is further provided in the center thereof, and the narrow connecting piece 9a of the magnetic buffer 9 is located in the through recess 3e.
【００３７】図９は、同じくさらに別の変形例である。
このものは、緩衝体用凹所3d,3d を広幅部 (磁極面)3c
の中央に設け、さらにその中央に貫通孔3fを設け、磁性
緩衝体9 の連結片9aを段付き丸棒状にして貫通孔3fに貫
通させ、そして対向片9c,9cをかしめ固着している。こ
のものは、磁性緩衝体9 の保持が前述の変形例よりさら
に確実になる。FIG. 9 shows another modification as well.
This is because the recesses 3d, 3d for the buffer body are formed in the wide part (pole face) 3c.
Is provided in the center of the magnetic buffer body 9 and a through hole 3f is further provided in the center of the magnetic buffer body 9. The connecting piece 9a of the magnetic buffer 9 is formed into a stepped round bar to penetrate the through hole 3f, and the facing pieces 9c and 9c are caulked and fixed. In this case, the holding of the magnetic buffer 9 becomes more reliable than in the above-described modification.
【００３８】図10は、図７あるいは図８の磁性緩衝体9
の変形例で、２個の磁性板材製の対向片9c,9c と非磁性
板材製の連結片9aを別々に形成し、後で一体化したもの
である。FIG. 10 shows the magnetic buffer 9 of FIG. 7 or 8.
In this modified example, the two opposing pieces 9c and 9c made of a magnetic plate material and the connecting piece 9a made of a non-magnetic plate material are separately formed and integrated later.
【００３９】なお、実施例あるいは変形例では、永久磁
石はアマチヤを構成する部材としたもので説明している
が、磁性部材、すなわちヨークや固定鉄心に介挿するよ
うにしてもよい。また、磁性緩衝体の形状やそれの保持
構造等は適宜の変更が可能である。また、本発明の接点
開閉装置は、電磁リレーの種々の形式のものに適用でき
ることは勿論である。In the embodiment or the modification, the permanent magnet is described as a member forming an armature, but it may be inserted in a magnetic member, that is, a yoke or a fixed iron core. Further, the shape of the magnetic buffer body, the structure for holding the magnetic buffer body, and the like can be appropriately changed. Further, the contact opening / closing device of the present invention can of course be applied to various types of electromagnetic relays.
【００４０】[0040]
【発明の効果】本発明の接点開閉装置は、電磁石のアマ
チヤは永久磁石の磁力により保持された磁性緩衝体を移
動させることによってその動作速度が低減し、従って耐
溶着性能の良好な接点対が投入されて次に接触抵抗性能
の良好な接点対が投入されるまでの投入時間差Δt2-1が
大きくとれて耐溶着性能がさらに高められるとともに、
アマチヤ固定鉄心の磁極面に衝突したときの衝突音も小
さくなるAccording to the contact opening / closing device of the present invention, the operating speed of the armature of the electromagnet is reduced by moving the magnetic buffer held by the magnetic force of the permanent magnet. The time difference Δt 2-1 between when the contact pair is turned on and when the contact pair with good contact resistance performance is turned on is large, and the welding resistance performance is further improved.
Collision noise when colliding with the magnetic pole surface of the stationary armature is also reduced
【図１】電磁リレーに適用した本発明の一実施例を示す
分解斜視図である。FIG. 1 is an exploded perspective view showing an embodiment of the present invention applied to an electromagnetic relay.
【図２】その平面図である。FIG. 2 is a plan view thereof.
【図３】その斜視図である。FIG. 3 is a perspective view thereof.
【図４】その要部分解斜視図である。FIG. 4 is an exploded perspective view of a main part thereof.
【図５】(a) 乃至(c) はアマチヤの動作説明図である。5 (a) to 5 (c) are diagrams for explaining the operation of the armature.
【図６】接点等の動作特性図である。FIG. 6 is an operation characteristic diagram of contacts and the like.
【図７】磁性緩衝体と固定鉄心の変形例を示す要部分解
斜視図である。FIG. 7 is an exploded perspective view of essential parts showing a modified example of the magnetic buffer body and the fixed iron core.
【図８】その別の変形例を示す要部分解斜視図である。FIG. 8 is an exploded perspective view of an essential part showing another modification thereof.
【図９】そのさらに別の変形例を示す要部分解斜視図で
ある。FIG. 9 is an exploded perspective view of an essential part showing still another modification thereof.
【図10】その磁性緩衝体の変形例を示す斜視図である。FIG. 10 is a perspective view showing a modified example of the magnetic buffer body.
【図11】従来例の吸引力特性図である。FIG. 11 is a suction force characteristic diagram of a conventional example.
【図12】その接点等の動作特性図である。FIG. 12 is an operational characteristic diagram of the contacts and the like.
1 磁性部材 2 ヨーク 3 固定鉄心 3c 広幅部 (磁極面) 3d 緩衝体用凹所 4 コイル 5 コイル枠 6 アマチヤ 6c アマチヤの接極子 7 永久磁石 8 可動枠 9 磁性緩衝体 9a 磁性緩衝体の連結片 9c 磁性緩衝体の対向片 10 耐溶着性能の良好な接点対 11 耐溶着性能の良好な接点対の固定接点 12 耐溶着性能の良好な接点対の可動接点 20 接触抵抗性能の良好な接点対接点 21 接触抵抗性能の良好な接点対接点の固定接点 22 接触抵抗性能の良好な接点対接点の可動接点 E 電磁石装置 R 電磁リレー B 電磁リレーの基台 1 Magnetic member 2 Yoke 3 Fixed iron core 3c Wide part (pole surface) 3d Buffer recess 4 Coil 5 Coil frame 6 Armature 6c Armature armature 7 Permanent magnet 8 Movable frame 9 Magnetic buffer 9a Magnetic buffer connecting piece 9c Opposite piece of magnetic buffer 10 Contact pair with good welding resistance 11 Fixed contact of contact pair with good welding resistance 12 Movable contact of contact pair with good welding resistance 20 Contact pair contact with good contact resistance 21 Contact with good contact resistance performance Fixed contact with contact 22 Movable contact with contact good contact resistance with contact E Electromagnetic device R Electromagnetic relay B Base of electromagnetic relay
Claims (1)
した磁性部材と、磁極面に吸引離反する接極子を有した
アマチヤと、アマチヤを保持する可動枠と、磁性部材と
アマチヤを含む磁気回路に介挿された永久磁石と、を備
えた電磁石を有し、耐溶着性能の良好な接点対と接触抵
抗性能の良好な接点対とを有してこれらが並列接続関係
にあり、それぞれの可動側接点を設けた可動接点板が電
磁石の可動枠によって駆動される接点開閉装置におい
て、前記電磁石は、前記磁極面と接極子間に永久磁石の
磁力により保持されるものであって、接極子が磁極面に
吸引されるとき接極子によって永久磁石による保持力に
抗して移動せしめられ、かつ移動せしめられたとき接極
子と磁極面の接触を阻害しない磁性緩衝体を設けたこと
を特徴とする接点開閉装置。1. A magnetic member that winds a coil and has a magnetic pole surface, an armature having an armature that attracts and separates from the magnetic pole surface, a movable frame that holds the armature, and a magnetic circuit including the magnetic member and the armature. An electromagnet having a permanent magnet and a contact pair having good welding resistance and a contact resistance having good contact resistance. In a contact switching device in which a movable contact plate provided with side contacts is driven by a movable frame of an electromagnet, the electromagnet is held by a magnetic force of a permanent magnet between the magnetic pole surface and the armature, and the armature is A magnetic buffer is provided that is moved by the armature against the holding force of the permanent magnet when attracted to the magnetic pole surface, and that does not hinder the contact between the armature and the magnetic pole surface when the armature is moved. Contact switching device Place
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19412492A JPH0636636A (en) | 1992-07-21 | 1992-07-21 | Contact opening/closing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19412492A JPH0636636A (en) | 1992-07-21 | 1992-07-21 | Contact opening/closing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0636636A true JPH0636636A (en) | 1994-02-10 |
Family
ID=16319312
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19412492A Pending JPH0636636A (en) | 1992-07-21 | 1992-07-21 | Contact opening/closing device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0636636A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008117612A (en) * | 2006-11-02 | 2008-05-22 | Toyo Denso Co Ltd | Switch apparatus |
| KR101109052B1 (en) * | 2011-08-12 | 2012-01-31 | 이상열 | A vapor generating apparatus in the water |
-
1992
- 1992-07-21 JP JP19412492A patent/JPH0636636A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008117612A (en) * | 2006-11-02 | 2008-05-22 | Toyo Denso Co Ltd | Switch apparatus |
| KR101109052B1 (en) * | 2011-08-12 | 2012-01-31 | 이상열 | A vapor generating apparatus in the water |
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