JP2007287526A - Contact device - Google Patents

Contact device Download PDF

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Publication number
JP2007287526A
JP2007287526A JP2006114888A JP2006114888A JP2007287526A JP 2007287526 A JP2007287526 A JP 2007287526A JP 2006114888 A JP2006114888 A JP 2006114888A JP 2006114888 A JP2006114888 A JP 2006114888A JP 2007287526 A JP2007287526 A JP 2007287526A
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Japan
Prior art keywords
contact
fixed
movable
iron core
movable contact
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JP2006114888A
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Japanese (ja)
Inventor
Tadahiro Itou
督裕 伊東
Katsuya Konama
克哉 粉間
Motoharu Kubo
基治 久保
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Priority to JP2006114888A priority Critical patent/JP2007287526A/en
Publication of JP2007287526A publication Critical patent/JP2007287526A/en
Withdrawn legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H50/00—Details of electromagnetic relays
    • H01H50/02—Bases; Casings; Covers
    • H01H50/023—Details concerning sealing, e.g. sealing casing with resin
    • H01H2050/025—Details concerning sealing, e.g. sealing casing with resin containing inert or dielectric gasses, e.g. SF6, for arc prevention or arc extinction

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a contact device capable of bringing a movable contact into contact with fixed contacts with desired contact pressure. <P>SOLUTION: The contact device A has a contact block 1 comprising a sealed container 10, a pair of fixed contacts 11a, 11a arranged in the sealed container 10, a movable contact 12 arranged in the sealed container 10 to contact and separate from both fixed contacts 11a, 11a, a contact pressure applying means 2 energizing the movable contact 12 to the fixed contact 11a, 11a side to bring the movable contact 12 into contact with the fixed contacts with predetermined contact pressure, and a regulating means 3 regulating the movement of the movable contact 12 to the fixed contact 11a, 11a side to hold the movable contact 12 in a spaced state from the fixed contacts 11a, 11a; and a driving block 4 releasing the movement regulation of the movable contact 12 by the regulating means 3 to bring the movable contact 12 into contact with the fixed contacts 11a, 11a. The contact pressure applying means 2 comprises a first coil spring 20 and a second coil spring 21 energizing the movable contact 12 to the fixed contact 11a, 11a side. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、パワー負荷用のリレーや電磁開閉器等に用いられる接点装置に関する。   The present invention relates to a contact device used for a power load relay, an electromagnetic switch, or the like.

従来から、封止容器内に固定接点及び固定接点に接離する可動接触子（又は可動接点）を収容した所謂封止接点装置が提供されている（例えば、特許文献１）。   2. Description of the Related Art Conventionally, a so-called sealed contact device in which a fixed contact and a movable contact (or movable contact) contacting and separating from the fixed contact are accommodated in a sealed container has been provided (for example, Patent Document 1).

以下にこのような接点装置について図４を参照して説明する。図４に示す接点装置１００は、一面が開口した絶縁材料製の封止容器１１１と、封止容器１１１内に配置される固定接点１１２ａを備えて封止容器１１１の他面部に気密接合される一対の固定端子１１２，１１２と、両固定接点１１２ａ，１１２ａにそれぞれ接離するように封止容器１１１内に配置される可動接触子１１３と、孔部１１４ａを有し封止容器１１１の開口１１１ａに気密接合される継鉄板１１４と、孔部１１４ａ内に位置した状態で継鉄板１１４に固定される固定鉄芯１１５と、一端に可動接触子１１３の固定接点１１２ａ側への移動を規制する規制部１１６ａを有し、固定鉄芯１１５に設けられた挿通孔１１５ａを移動自在に挿通するシャフト１１６と、固定鉄芯１１５に対向配置されるとともにシャフト１１６の他端が固定されて、可動接触子１１３が固定接点１１２ａに接離する方向に移動自在な可動鉄芯（プランジャ）１１７と、可動鉄芯１１７を移動自在に収納して継鉄板１１４の一面側に気密接合される磁性材料製のプランジャキャップ１１８と、可動接触子１１３を固定接点１１２ａ側へ付勢して可動接触子１１３を所定の接圧（接触圧）で固定接点１１２ａに接触させる接圧ばねであるコイルばね１１９と、固定鉄芯１１５と可動鉄芯１１７との間に介装され可動鉄芯１１７を継鉄板１１４から離間する方向へ付勢する復帰ばね１２０とからなる接点ブロック１１０、及び電流が流れて励磁されることにより、接点ブロック１１０の可動鉄芯１１７を固定鉄芯１１５に吸引させるコイル２１０等を有する駆動ブロック２００を備えている。
特開２００３−１９７０８２号公報（図１） Hereinafter, such a contact device will be described with reference to FIG. A contact device 100 shown in FIG. 4 is provided with a sealing container 111 made of an insulating material whose one surface is open and a fixed contact 112a disposed in the sealing container 111, and is hermetically joined to the other surface portion of the sealing container 111. A pair of fixed terminals 112, 112, a movable contact 113 arranged in the sealing container 111 so as to be in contact with and away from the fixed contacts 112a, 112a, and an opening 111a of the sealing container 111 having a hole 114a. A yoke plate 114 that is airtightly joined, a fixed iron core 115 that is fixed to the yoke plate 114 while being positioned in the hole 114a, and a restriction that restricts movement of the movable contactor 113 to the fixed contact 112a side at one end. A shaft 116 that has a portion 116 a and is movably inserted through an insertion hole 115 a provided in the fixed iron core 115, and is disposed so as to face the fixed iron core 115 and the other end of the shaft 116 is fixed. Then, the movable contact 113 is movable in the direction in which the movable contact 113 is moved toward and away from the fixed contact 112a, and the movable iron 117 is movably accommodated and hermetically joined to one surface side of the yoke plate 114. A plunger cap 118 made of a magnetic material and a coil that is a contact pressure spring that urges the movable contact 113 toward the fixed contact 112a to bring the movable contact 113 into contact with the fixed contact 112a with a predetermined contact pressure (contact pressure). A contact block 110 including a spring 119, a return spring 120 interposed between the fixed iron core 115 and the movable iron core 117 and biasing the movable iron core 117 in a direction away from the yoke plate 114, and current flows. The drive block 200 includes a coil 210 that attracts the movable iron core 117 of the contact block 110 to the fixed iron core 115 by being excited.
Japanese Patent Laying-Open No. 2003-197082 (FIG. 1)

以上述べた接点装置１００では、可動接触子１１３が固定接点１１２ａに接触して接点がオンとなっている際に、振動や衝撃等の外的要因等によって、予期せずに可動接触子１１３が固定接点１１２ａから離れて接点がオフとなってしまうことがないように、コイルばね１１９を用いて、可動接触子１１３を固定接点１１２ａ側に付勢することによって、可動接触子１１３が固定接点１１２ａに所定の接圧で接触するようにしており、これによって接触信頼性の向上が図られている。   In the contact device 100 described above, when the movable contact 113 is in contact with the fixed contact 112a and the contact is turned on, the movable contact 113 is unexpectedly caused by external factors such as vibration and impact. The movable contact 113 is fixed to the fixed contact 112a by biasing the movable contact 113 to the fixed contact 112a side by using the coil spring 119 so that the contact is not turned off from the fixed contact 112a. The contact reliability is improved with a predetermined contact pressure, thereby improving the contact reliability.

しかしながら、コイルばね１１９は、可動接触子１１３と継鉄板１１４との間に介装されるものであるから、コイルばね１１９の長さ（換言すれば有効巻数）には限界がある。そのため、所定値以上のばね定数を有するコイルばね１１９は用いることができず、これにより図４に示す接点装置１００では、可動接触子１１３が固定接点１１２ａに接触する際の接圧を所望の値に設定できない場合が多々あった。   However, since the coil spring 119 is interposed between the movable contact 113 and the yoke plate 114, the length of the coil spring 119 (in other words, the effective number of turns) is limited. Therefore, the coil spring 119 having a spring constant greater than or equal to a predetermined value cannot be used. Accordingly, in the contact device 100 shown in FIG. 4, the contact pressure when the movable contactor 113 contacts the fixed contact 112a is a desired value. There were many cases that could not be set.

特に、接点装置１００の電流容量を大きくした際には、接圧を所望の値に設定できないことが多かった。これは、接点装置１００の電流容量を大きくした際には、接触抵抗を小さくするために、可動接触子１１３と固定接点１１２ａとの接触面積を大きくする必要があることに起因する。ここで、可動接触子１１３と固定接点１１２ａとの接触面積を大きくするには、接触部に弾性変形をさせる必要があり、これは接圧を大きくすることでなし得る。   In particular, when the current capacity of the contact device 100 is increased, the contact pressure cannot often be set to a desired value. This is because when the current capacity of the contact device 100 is increased, it is necessary to increase the contact area between the movable contact 113 and the fixed contact 112a in order to reduce the contact resistance. Here, in order to increase the contact area between the movable contactor 113 and the fixed contact 112a, it is necessary to elastically deform the contact portion, and this can be achieved by increasing the contact pressure.

このように接触面積を大きくするために、所望の接圧を得ようとする場合には、ばね定数がより大きいコイルばね１１９を用いる必要があるが、上述したように用いることができるコイルばね１１９の長さには限界がある。そのため、得ることができる接圧には限界があり、接点装置１００の電流容量が大きくなればなるほど、接触抵抗による発熱が大きくなり、通電性能の低下（換言すれば、通電時間の制約）が発生していた。   In order to obtain a desired contact pressure in order to increase the contact area in this way, it is necessary to use the coil spring 119 having a larger spring constant, but the coil spring 119 that can be used as described above. There is a limit to the length of. For this reason, there is a limit to the contact pressure that can be obtained, and the larger the current capacity of the contact device 100, the greater the heat generated by the contact resistance, resulting in a decrease in energization performance (in other words, energization time limitation). Was.

以上述べたように、従来の接点装置では、一のコイルばね１１９を用いて可動接触子１１３を固定接点１１２ａに接触させているため、所望の接圧が得られず、これにより通電性能の低下を招いてしまうという問題が生じていた。   As described above, in the conventional contact device, since the movable contact 113 is brought into contact with the fixed contact 112a by using one coil spring 119, a desired contact pressure cannot be obtained, thereby reducing the energization performance. There was a problem of inviting.

本発明は上述の点に鑑みて為されたもので、その目的は、可動接触子を固定接点に所望の接圧で接触させることができる接点装置を提供することにある。   The present invention has been made in view of the above points, and an object of the present invention is to provide a contact device capable of bringing a movable contact into contact with a fixed contact with a desired contact pressure.

上記の課題を解決するために、請求項１の接点装置の発明では、絶縁材料製の封止容器と、該封止容器内に配置される固定接点と、固定接点に接離するように封止容器内に配置される可動接触子と、可動接触子を固定接点側に付勢し、可動接触子を所定の接圧で固定接点に接触させる接圧付与手段と、可動接触子の固定接点側への移動を規制して、可動接触子を固定接点から離間した状態に保持する規制手段とを備える接点ブロック、及び規制手段による可動接触子の移動規制を解除して可動接触子を固定接点に接触させる駆動ブロックを有し、接圧付与手段は、可動接触子を固定接点側に付勢する複数のコイルばねからなることを特徴とする。   In order to solve the above-mentioned problems, in the invention of the contact device according to claim 1, the sealing container made of an insulating material, the fixed contact disposed in the sealing container, and the sealed contact so as to be in contact with and away from the fixed contact. A movable contact disposed in the stop container, a contact pressure applying means for urging the movable contact toward the fixed contact, and bringing the movable contact into contact with the fixed contact with a predetermined contact pressure, and a fixed contact of the movable contact And a contact block including a restricting means for restricting movement to the side and holding the movable contact member in a state of being separated from the fixed contact, and releasing the movement restriction of the movable contact by the restricting means to fix the movable contact to the fixed contact. The contact pressure applying means comprises a plurality of coil springs that urge the movable contact toward the fixed contact.

本発明は、可動接触子が固定接点に接触した際の接圧の大きさを、複数のコイルばねのそれぞれのばね定数によって設定することができるから、例えば接圧付与手段の配置スペースの都合上、コイルばねの長さ（コイルばねのばね定数の最大値）が限られている場合でも、可動接触子を固定接点に所望の接圧で接触させることができるという効果を奏する。   In the present invention, the magnitude of the contact pressure when the movable contact contacts the fixed contact can be set by the respective spring constants of the plurality of coil springs. Even when the length of the coil spring (the maximum value of the spring constant of the coil spring) is limited, the movable contact can be brought into contact with the fixed contact with a desired contact pressure.

以下に、本発明の接点装置の一実施形態について、図１〜図３を参照して説明する。   Below, one Embodiment of the contact apparatus of this invention is described with reference to FIGS. 1-3.

本実施形態の接点装置Ａは、所謂封止接点装置（静音接点装置ともいう）であって、絶縁材料製の封止容器１０と、該封止容器１０内に配置される一対の固定接点１１ａ，１１ａと、両固定接点１１ａ，１１ａに接離するように封止容器１０内に配置される可動接触子１２と、可動接触子１２を固定接点１１ａ，１１ａ側に付勢し、可動接触子１２を所定の接圧で固定接点１１ａ，１１ａに接触させる接圧付与手段２と、可動接触子１２の固定接点１１ａ，１１ａ側への移動を規制して、可動接触子１２を固定接点１１ａ，１１ａから離間した状態に保持する規制手段３とを備える接点ブロック１、及び規制手段３による可動接触子１２の移動規制を解除して可動接触子１２を固定接点１１ａ，１１ａに接触させる駆動ブロック４、並びに接点ブロック１と駆動ブロック４とを収納するハウジング（図示せず）を備えている。尚、接点装置Ａには、これらの他に、接点ブロック１の固定接点１１ａ，１１ａと可動接触子１２との間に生じるアークを短時間で消弧するためのカプセルヨーク（図示せず）等が設けられる。   The contact device A of the present embodiment is a so-called sealed contact device (also referred to as a silent contact device), which is a sealing container 10 made of an insulating material and a pair of fixed contacts 11a arranged in the sealing container 10. , 11a, the movable contact 12 disposed in the sealed container 10 so as to be in contact with and away from both the fixed contacts 11a, 11a, and the movable contact 12 are urged toward the fixed contacts 11a, 11a to move the movable contact Contact pressure applying means 2 for bringing the contact 12 into contact with the fixed contacts 11a and 11a with a predetermined contact pressure, and the movement of the movable contact 12 toward the fixed contacts 11a and 11a is restricted, and the movable contact 12 is fixed to the fixed contact 11a, A contact block 1 having a regulating means 3 that is held away from 11a, and a drive block 4 that releases the movement restriction of the movable contact 12 by the regulating means 3 and brings the movable contact 12 into contact with the fixed contacts 11a and 11a. And contact And a housing (not shown) for accommodating the block 1 and the driving block 4. In addition to these, the contact device A includes a capsule yoke (not shown) for extinguishing an arc generated between the fixed contacts 11a, 11a of the contact block 1 and the movable contact 12 in a short time. Is provided.

接点ブロック１は、図１に示すように、一面（図１における下面）に開口１０ａを有する絶縁材料製の封止容器１０と、封止容器１０内に配置される固定接点１１ａを有して封止容器１０の他面（図１における上面）に気密接合される一対の固定端子１１，１１と、両固定接点１１ａ，１１ａにそれぞれ接離するように封止容器１０内に配置される可動接触子１２と、中央部に孔部１３ａを有して封止容器１０の開口１０ａに対向配置される継鉄板１３と、継鉄板１３と封止容器１０とを連結して継鉄板１３を封止容器１０に気密接合するための封止部材１４と、接圧付与手段２と、規制手段３とを備えている。   As shown in FIG. 1, the contact block 1 has a sealing container 10 made of an insulating material having an opening 10 a on one surface (the lower surface in FIG. 1), and a fixed contact 11 a disposed in the sealing container 10. A pair of fixed terminals 11 and 11 hermetically joined to the other surface (upper surface in FIG. 1) of the sealing container 10 and a movable member disposed in the sealing container 10 so as to be in contact with and away from the fixed contacts 11a and 11a. The contact plate 12, the yoke plate 13 having a hole portion 13a in the central portion and disposed opposite to the opening 10a of the sealing vessel 10, and the yoke plate 13 and the sealing vessel 10 are connected to seal the yoke plate 13. The sealing member 14 for airtightly joining to the stop container 10, the contact pressure provision means 2, and the control means 3 are provided.

この接点ブロック１において、規制手段３は、図２に示すように、一端（図１における上端）に可動接触子１２の固定接点１１ａ側への移動を規制する規制部３０ａを有するシャフト３０と、シャフト３０用の挿通孔３１ａを有するとともに一端部（図１における上端部）にフランジ部３１ｂを有し、継鉄板１３に取り付けられる固定鉄芯３１と、固定鉄芯３１を継鉄板１３に固定するストッパキャップ３２と、固定鉄芯３１の他端部（図１における下端部）に対向配置されるとともにシャフト３０の他端（図１における下端）が固定され、可動接触子１２が固定接点１１ａと接離する方向に移動自在に配置される可動鉄芯（プランジャ）３３と、可動鉄芯３３を移動自在に収納して継鉄板１３に気密接合されるプランジャキャップ３４と、固定鉄芯３１と可動鉄芯３３との間に介装されて可動鉄芯３３を固定鉄芯３１より離間させた状態に保持するための復帰ばね３５と、プランジャキャップ３４の底部３４ｂと可動鉄芯３４との間に介装される第１弾性部材３６と、可動鉄芯３３において固定鉄芯３１と対向する面（図１における上面）に設けられる第２弾性部材３７と、固定鉄芯３１のフランジ部３１ｂと継鉄板１３との間に介装される第３弾性部材３８と、固定鉄芯３１のフランジ部３１ｂとストッパキャップ３２との間に介装される第４弾性部材３９とで構成されている。   In the contact block 1, as shown in FIG. 2, the restricting means 3 includes a shaft 30 having a restricting portion 30a for restricting the movement of the movable contact 12 toward the fixed contact 11a at one end (the upper end in FIG. 1), The shaft 30 has an insertion hole 31 a and a flange 31 b at one end (upper end in FIG. 1), and the fixed iron core 31 attached to the yoke plate 13 and the fixed iron core 31 are fixed to the yoke plate 13. The stopper cap 32 and the other end (lower end in FIG. 1) of the fixed iron core 31 are arranged opposite to each other and the other end (lower end in FIG. 1) of the shaft 30 is fixed, and the movable contact 12 is connected to the fixed contact 11a. A movable iron core (plunger) 33 movably disposed in the contacting / separating direction; a plunger cap 34 that houses the movable iron core 33 movably and is hermetically joined to the yoke plate 13; A return spring 35 interposed between the fixed iron core 31 and the movable iron core 33 for holding the movable iron core 33 in a state of being separated from the fixed iron core 31, a bottom 34b of the plunger cap 34, and the movable iron A first elastic member 36 interposed between the core 34, a second elastic member 37 provided on a surface of the movable iron core 33 facing the fixed iron core 31 (upper surface in FIG. 1), and the fixed iron core 31. A third elastic member 38 interposed between the flange portion 31b and the yoke plate 13 and a fourth elastic member 39 interposed between the flange portion 31b of the fixed iron core 31 and the stopper cap 32. It is configured.

また、接圧付与手段２は、可動接触子１２とストッパキャップ３２との間に介装される第１コイルばね２０及び第２コイルばね２１とで構成されている。   The contact pressure applying means 2 includes a first coil spring 20 and a second coil spring 21 that are interposed between the movable contact 12 and the stopper cap 32.

以下に、接点ブロック１を構成する各部材について図１〜図３を参照して詳細に説明する。   Below, each member which comprises the contact block 1 is demonstrated in detail with reference to FIGS. 1-3.

封止容器１０は、図１及び図３に示すように、例えばセラミック等の耐熱及び絶縁性を備えた材料から、一面（図１における下面）に開口１０ａを備えた箱状に形成され、他面（図１における上面）には各固定端子１１，１１の固定接点１１ａ，１１ａを封止容器１０内に挿入するための接点挿通孔１０ｂ，１０ｂが設けられている。   As shown in FIGS. 1 and 3, the sealing container 10 is formed in a box shape having an opening 10 a on one surface (lower surface in FIG. 1) from a material having heat resistance and insulation properties such as ceramic. Contact insertion holes 10 b and 10 b for inserting the fixed contacts 11 a and 11 a of the fixed terminals 11 and 11 into the sealing container 10 are provided on the surface (upper surface in FIG. 1).

固定端子１１は、例えば銅系材料等の導電性材料を用いて形成され、プリント基板等の外部の電気回路に接続するための端子部（図示せず）等をねじ止めするためのねじ孔１１ｂが設けられた有底円筒状の円筒部１１ｃを有し、円筒部１１ｃの底部に固定接点１１ａが設けられている。ここで、固定接点１１ａとしては、耐溶着性、耐環境性、及び耐熱性の高い導電性金属材料等が用いられる。   The fixed terminal 11 is formed using a conductive material such as a copper-based material, for example, and is a screw hole 11b for screwing a terminal portion (not shown) for connecting to an external electric circuit such as a printed board. Is provided, and a fixed contact 11a is provided at the bottom of the cylindrical portion 11c. Here, as the fixed contact 11a, a conductive metal material having high welding resistance, environmental resistance, and heat resistance is used.

可動接触子１２は、例えば、銅系材料等の導電性材料から平板状に形成されており、略中央部には、シャフト３０が挿通されるシャフト挿通孔１２ａが、可動接触子１２が固定接点１１ａと接離する方向に貫設されている。また、可動接触子１２において継鉄板１３と対向する面（図１における下面）には、図１に示すように、第２コイルばね２１の一端部が嵌入される円形状のばね保持穴１２ｂが凹設されている。尚、固定接点１１ａ，１１ａとの接触導通性を向上させるために、可動接触子１２において一対の固定端子１１，１１と対向する面に、固定接点１１ａ，１１ａとそれぞれ接離する可動接点を設けるようにしてもよい。尚、可動接点としては、上記固定接点１１ａと同様に、耐溶着性、耐環境性、及び耐熱性の高い導電性金属材料等が用いられる。   The movable contact 12 is formed in a flat plate shape from, for example, a conductive material such as a copper-based material. A shaft insertion hole 12a through which the shaft 30 is inserted is formed at a substantially central portion, and the movable contact 12 is a fixed contact. It penetrates in the direction which contacts / separates 11a. Further, as shown in FIG. 1, a circular spring holding hole 12 b into which one end of the second coil spring 21 is fitted is formed on the surface of the movable contact 12 that faces the yoke plate 13 (the lower surface in FIG. 1). It is recessed. In order to improve the contact continuity with the fixed contacts 11a and 11a, the movable contact 12 is provided with a movable contact that contacts and separates from the fixed contacts 11a and 11a on the surface facing the pair of fixed terminals 11 and 11, respectively. You may do it. As the movable contact, as in the case of the fixed contact 11a, a conductive metal material having high welding resistance, environmental resistance, and heat resistance is used.

継鉄板１３は、鉄等の磁性金属材料により少なくとも封止容器１０の開口１０ａを閉塞できる程度の大きさの平板状に形成され、固定鉄芯３１、可動鉄芯３３、及び後述する継鉄部５とともに磁気回路を形成するものである。この継鉄板１３の略中央部には、後述する固定鉄芯３１の本体部３１ｃの外径と同程度の内径を有する固定鉄芯用の孔部１３ａが形成され、継鉄板１３の長手方向両側縁には、継鉄部５を取り付けるための嵌合用突起１３ｂが一体に突設されている。   The yoke plate 13 is formed in a flat plate shape having a size that can at least close the opening 10a of the sealing container 10 with a magnetic metal material such as iron, and includes a fixed iron core 31, a movable iron core 33, and a later-described yoke portion. 5 forms a magnetic circuit. In the substantially central portion of the yoke plate 13, a hole portion 13a for a fixed iron core having an inner diameter approximately equal to the outer diameter of a main body portion 31c of the fixed iron core 31 to be described later is formed. A fitting protrusion 13b for attaching the yoke portion 5 is integrally provided on the edge.

封止部材１４は、例えば合成樹脂成形品であって、両面（図１における上下面）が開口した角筒状に形成されている。そして、この封止部材１４は、一面側（図１における上面側）が封止容器１０の開口１０ａの縁部に気密接合されるとともに、他面側（図１における下面側）が継鉄板１３において封止容器１０と対向する面に気密接合され、これにより、継鉄板１３が封止容器１０の開口１０ａを閉塞するようにして封止容器１０に気密接合されることになる。   The sealing member 14 is, for example, a synthetic resin molded product, and is formed in a rectangular tube shape with both surfaces (upper and lower surfaces in FIG. 1) opened. The sealing member 14 has one surface side (upper surface side in FIG. 1) hermetically joined to the edge of the opening 10a of the sealing container 10 and the other surface side (lower surface side in FIG. 1) on the yoke plate 13. In this case, the yoke plate 13 is hermetically joined to the sealing container 10 so as to close the opening 10 a of the sealing container 10.

シャフト３０は、例えば非磁性材料等を用いて形成されており、略丸棒状の軸部３０ｂを有している。この軸部３０ｂの一端部には、軸部３０ｂの外径より大きい外径を有する円盤状に形成された規制部３０ａが一体に設けられている。この規制部３０ａは、可動接触子１２において固定接点１１ａ，１１ａと対向する面（図１（ａ）における上面）に当接して、可動接触子１２の固定接点１１ａ側への移動を規制するためのものである。一方、軸部３０ｂの他端部には、ねじ溝（図示せず）が形成されている。また、軸部３０ｂは、固定鉄芯３１の軸方向の長さよりも十分に長く形成されており、可動接触子１２が固定接点１１ａ，１１ａに接触した状態でも軸部３０ｂの他端部が固定鉄芯３１の挿通孔３１ａ内に没入しないようにしている。   The shaft 30 is formed using, for example, a nonmagnetic material or the like, and has a substantially round bar-shaped shaft portion 30b. One end portion of the shaft portion 30b is integrally provided with a regulating portion 30a formed in a disk shape having an outer diameter larger than the outer diameter of the shaft portion 30b. The restricting portion 30a abuts on the surface of the movable contact 12 facing the fixed contacts 11a and 11a (the upper surface in FIG. 1A), and restricts the movement of the movable contact 12 toward the fixed contact 11a. belongs to. On the other hand, a thread groove (not shown) is formed at the other end of the shaft portion 30b. The shaft portion 30b is formed sufficiently longer than the axial length of the fixed iron core 31, and the other end portion of the shaft portion 30b is fixed even when the movable contact 12 is in contact with the fixed contacts 11a and 11a. The iron core 31 is not inserted into the insertion hole 31a.

固定鉄芯３１は、例えば鉄等の磁性材料を用いて形成されており、前述の円柱状の本体部３１ｃと、本体部３１ｃの一端縁部に設けられ、本体部３１ｃの外径より大きい外径を有する円環状のフランジ部３１ｂとを一体に備えている。また、固定鉄芯３１には、軸方向に挿通孔３１ａが貫設されており、該挿通孔３１ａは、他端部側の内径が一端部側の内径に比べて大きく形成されている。そして、挿通孔３１ａにおいて内径が大きい他端部側は、復帰ばね３５用の収納室として用いられる。   The fixed iron core 31 is formed using, for example, a magnetic material such as iron, and is provided on the above-described columnar main body portion 31c and one end edge of the main body portion 31c, and has an outer diameter larger than the outer diameter of the main body portion 31c. An annular flange portion 31b having a diameter is integrally provided. The fixed iron core 31 is provided with an insertion hole 31a extending in the axial direction. The insertion hole 31a has an inner diameter on the other end side larger than an inner diameter on the one end side. The other end portion side having a large inner diameter in the insertion hole 31 a is used as a storage chamber for the return spring 35.

ストッパキャップ３２は、例えば磁性材料又は非磁性材料を用いて形成され、固定鉄芯３１のフランジ部３１ｂの外径以上の内径を有するとともにフランジ部３１ｂの厚さ寸法より大きい高さ寸法を有する円筒部３２ｂと、円筒部３２ｂの一端開口を閉塞する円盤部３２ｃと、円筒部３２ｂの他端開口縁部に設けられた鍔部３２ｄとを一体に備えており、円盤部３２ｃの略中央部には、固定鉄芯３１の挿通孔３１ａと連通する連通孔３２ａが設けられている。また、円盤部３２ｃにおいて、可動接触子１２と対向する面には、第１コイルばね２０の内径と同程度の外径を有して第１コイルばね２０の他端部（図１における下端部）に嵌入される円環状のリブ３２ｅが一体に突設されている。さらに、円盤部３２ｃにおいて第４弾性部材３９と対向する面には、第４弾性部材３９に当接される突起部３２ｆが一体に設けられている。   The stopper cap 32 is formed of, for example, a magnetic material or a non-magnetic material, and has a cylinder having an inner diameter equal to or larger than the outer diameter of the flange 31b of the fixed iron core 31 and a height larger than the thickness of the flange 31b. A portion 32b, a disc portion 32c that closes one end opening of the cylindrical portion 32b, and a flange portion 32d provided at the edge of the other end opening of the cylindrical portion 32b are integrally provided, and at a substantially central portion of the disc portion 32c. Is provided with a communication hole 32 a that communicates with the insertion hole 31 a of the fixed iron core 31. Further, in the disk portion 32c, the surface facing the movable contact 12 has an outer diameter similar to the inner diameter of the first coil spring 20, and the other end portion of the first coil spring 20 (the lower end portion in FIG. 1). ) And an annular rib 32e that is fitted into the body. Further, on the surface of the disk portion 32c that faces the fourth elastic member 39, a protrusion 32f that comes into contact with the fourth elastic member 39 is integrally provided.

可動鉄芯（プランジャ）３３は、例えば鉄等の磁性材料を用いて略円柱状に形成されている。この可動鉄芯３３には、シャフト３０の他端部が挿入される孔部３３ａが軸方向に貫設されており、孔部３３ａの内周面には、シャフト３０のねじ溝に対応するねじ溝（図示せず）が形成されている。   The movable iron core (plunger) 33 is formed in a substantially cylindrical shape using a magnetic material such as iron. The movable iron core 33 is provided with a hole 33a into which the other end of the shaft 30 is inserted in the axial direction. A screw corresponding to the thread groove of the shaft 30 is formed on the inner peripheral surface of the hole 33a. A groove (not shown) is formed.

プランジャキャップ３４は、例えば磁性材料又は非磁性材料を用いて形成され、可動鉄芯３３の外径と略同寸法の内径を有する円筒部３４ａと、円筒部３４ａの一端開口（図１における下端開口）を閉塞する底部３４ｂと、円筒部３４ａの他端開口（図１における上端開口）の縁部から外方へ突出する円環状のフランジ部３４ｃとを一体に備えており、その軸方向の長さ寸法は、可動鉄芯３３の移動用スペースを確保できる程度の大きさに設定されている。また、円筒部３４ａの内周面は、可動鉄芯３３が摺動する摺動面として用いられる。   The plunger cap 34 is formed using, for example, a magnetic material or a non-magnetic material, and has a cylindrical portion 34a having an inner diameter substantially the same as the outer diameter of the movable iron core 33, and one end opening of the cylindrical portion 34a (the lower end opening in FIG. 1). ) And an annular flange portion 34c protruding outward from the edge of the other end opening (the upper end opening in FIG. 1) of the cylindrical portion 34a. The dimension is set to such a size that a space for moving the movable iron core 33 can be secured. Further, the inner peripheral surface of the cylindrical portion 34a is used as a sliding surface on which the movable iron core 33 slides.

復帰ばね３５は、接圧付与手段２の付勢力に逆らって可動鉄芯３３を固定鉄芯３１から離間する方向へ付勢するためのものであり、固定鉄芯３１と可動鉄芯３３との間に介装されている。このような復帰ばね３５は、例えばコイルばね等が用いられている。また、復帰ばね３５の長さは、固定鉄芯３１の挿通孔３１ａの他端部側に収納した際に、固定鉄芯３１から一端部（図１における下端部）が突出できる程度の長さに設定されている。   The return spring 35 is for urging the movable iron core 33 in a direction away from the fixed iron core 31 against the urging force of the contact pressure applying means 2, and between the fixed iron core 31 and the movable iron core 33. Intervened in between. As such a return spring 35, for example, a coil spring or the like is used. The length of the return spring 35 is such that one end (the lower end in FIG. 1) can protrude from the fixed iron core 31 when housed in the other end of the insertion hole 31a of the fixed iron core 31. Is set to

第１弾性部材３６は、復帰ばね３５により可動鉄芯３３がプランジャキャップ３４の底部３４ｂ側に移動されて、可動鉄芯３３がプランジャキャップ３４に衝突した際の衝撃（振動）及び衝撃音を低減するためのものであり、例えばゴム等の弾性材料を用いてプランジャキャップ３４の内径と同程度の外径を有する円盤状に形成されている。第２弾性部材３７は、駆動ブロック４により可動鉄芯３３が固定鉄芯３１側へ移動されて、可動鉄芯３３が固定鉄芯３１に衝突した際の衝撃及び衝撃音を低減するためのものであり、例えばゴム等の弾性材料を用いて固定鉄芯３１の挿通孔３１ａの他端部側の内径よりも大きい外径を有する円盤状に形成されている。また、第２弾性部材３７の略中央部には、シャフト３０の軸部３０ｂが挿通されるシャフト挿通孔３７ａが形成されている。   The first elastic member 36 reduces impact (vibration) and impact sound when the movable iron core 33 collides with the plunger cap 34 when the movable iron core 33 is moved to the bottom 34b side of the plunger cap 34 by the return spring 35. For example, an elastic material such as rubber is used to form a disk having an outer diameter similar to the inner diameter of the plunger cap 34. The second elastic member 37 is for reducing impact and impact sound when the movable iron core 33 is moved to the fixed iron core 31 side by the drive block 4 and the movable iron core 33 collides with the fixed iron core 31. For example, it is formed in a disk shape having an outer diameter larger than the inner diameter on the other end side of the insertion hole 31a of the fixed iron core 31 using an elastic material such as rubber. A shaft insertion hole 37 a through which the shaft portion 30 b of the shaft 30 is inserted is formed at a substantially central portion of the second elastic member 37.

第３弾性部材３８は、可動鉄芯３３が固定鉄芯３１に衝突した際に、固定鉄芯３１を介して継鉄板１３に伝達される衝撃を低減するための緩衝材として用いられているものであり、例えばゴム等の弾性材料を用いて、固定鉄芯３１の本体部３１ｃの外径と同程度の内径を有する円環状に形成されている。第４弾性部材３９は、可動鉄芯３３が固定鉄芯３１に衝突した際に、固定鉄芯３１を介してストッパキャップ３２に伝達される衝撃を低減するための緩衝材として用いられているものであり、例えばゴム等の弾性材料を用いて固定鉄芯３１のフランジ部３１ｂの外径と同程度の外径を有する円盤状に形成されている。また、第４弾性部材３９の中央部には、シャフト３０の軸部３０ｂが挿通されるシャフト挿通孔３９ａが形成されている。このような第３及び第４弾性部材３８，３９を設けることで、可動鉄芯３３が固定鉄芯３１に衝突した際に固定鉄芯３１を介して継鉄板１３及びストッパキャップ３２に伝達される衝撃を低減し、これにより、衝撃音を低減するとともに、前述の衝撃によってストッパキャップ３２が継鉄板１３から外れてしまう等の不具合を防止している。   The third elastic member 38 is used as a cushioning material for reducing an impact transmitted to the yoke plate 13 through the fixed iron core 31 when the movable iron core 33 collides with the fixed iron core 31. For example, an elastic material such as rubber is used to form an annular shape having an inner diameter comparable to the outer diameter of the main body 31c of the fixed iron core 31. The fourth elastic member 39 is used as a buffer material for reducing an impact transmitted to the stopper cap 32 through the fixed iron core 31 when the movable iron core 33 collides with the fixed iron core 31. For example, an elastic material such as rubber is used to form a disk having the same outer diameter as the flange 31b of the fixed iron core 31. Further, a shaft insertion hole 39 a through which the shaft portion 30 b of the shaft 30 is inserted is formed at the center of the fourth elastic member 39. By providing such third and fourth elastic members 38 and 39, when the movable iron core 33 collides with the fixed iron core 31, it is transmitted to the yoke plate 13 and the stopper cap 32 via the fixed iron core 31. The impact is reduced, thereby reducing the impact sound and preventing problems such as the stopper cap 32 being detached from the yoke plate 13 due to the aforementioned impact.

第１コイルばね２０及び第２コイルばね２１は、可動接触子１２を固定接点１１ａ，１１ａ側に付勢し、可動接触子１２を所定の接圧で固定接点１１ａ，１１ａに接触させる接圧付与手段２を構成するものであり、第２コイルばね２１の内径は、第１コイルばね２０の外径よりも大きく設定されている。そして、これらコイルばね２０，２１は、各々の中心軸をシャフト３０の中心軸に一致させた状態で、可動接触子１２とストッパキャップ３２の円盤部３２ｃとの間に介装されており、これにより各コイルばね２０，２１による付勢力が可動接触子１２に均等にかかるようにしている。   The first coil spring 20 and the second coil spring 21 apply a contact pressure that urges the movable contact 12 toward the fixed contacts 11a and 11a and causes the movable contact 12 to contact the fixed contacts 11a and 11a with a predetermined contact pressure. The means 2 is configured, and the inner diameter of the second coil spring 21 is set larger than the outer diameter of the first coil spring 20. The coil springs 20 and 21 are interposed between the movable contact 12 and the disk portion 32c of the stopper cap 32 in a state where the center axes of the coil springs 20 and 21 coincide with the center axis of the shaft 30, respectively. Thus, the urging force by the coil springs 20 and 21 is applied to the movable contact 12 evenly.

このように接圧付与手段２は、第１コイルばね２０と第２コイルばね２１とで構成されているため、可動接触子１２が固定接点１１ａ，１１ａに接触した際の接圧の大きさは、各コイルばね２０，２１のばね定数の値によって決定されることになる。すなわち、接圧付与手段２によれば、２つのコイルばね２０，２１の各ばね定数によって、上記接圧を所望の値に設定することができる。そのため、図４に示す接点装置１００のように１つのコイルばね１１９を用いて可動接触子１１３の接圧を設定する場合に比べて、接圧の設定の自由度が向上する。特に、コイルばねの配置スペースの都合上、コイルばねの長さが限られてしまうような場合でも、本実施形態のように２つのコイルばね２０，２１を用いて接圧付与手段２を構成することにより、所望の接圧を得ることができ、接触信頼性を確保できる。   As described above, the contact pressure applying means 2 includes the first coil spring 20 and the second coil spring 21. Therefore, the contact pressure when the movable contact 12 contacts the fixed contacts 11a and 11a is as follows. The value is determined by the value of the spring constant of each of the coil springs 20 and 21. That is, according to the contact pressure applying means 2, the contact pressure can be set to a desired value by the spring constants of the two coil springs 20 and 21. Therefore, the degree of freedom in setting the contact pressure is improved as compared to the case where the contact pressure of the movable contactor 113 is set using one coil spring 119 as in the contact device 100 shown in FIG. In particular, even when the length of the coil spring is limited due to the space of the coil spring, the contact pressure applying means 2 is configured using the two coil springs 20 and 21 as in the present embodiment. Thus, a desired contact pressure can be obtained and contact reliability can be ensured.

以上述べた部材により接点ブロック１は構成されており、各部材は次のようにして取り付けられている。   The contact block 1 is constituted by the members described above, and each member is attached as follows.

封止容器１０には、一対の固定端子１１が、各接点挿通孔１０ｂから円筒部１１ｃを封止容器１０内に挿入した状態で封止容器１０の他面部にロウ等の気密封止材により気密接合される。   A pair of fixed terminals 11 are provided on the sealing container 10 with an airtight sealing material such as wax on the other surface portion of the sealing container 10 in a state where the cylindrical portion 11c is inserted into the sealing container 10 from each contact insertion hole 10b. Airtight joined.

一方、継鉄板１３には、フランジ部３０ｂを継鉄板１３において可動接触子１２と対向する面（図１における上面）に対向させ、他端部を孔部１３ａから継鉄板１３において可動接触子１２と対向しない面（図１における下面）側へ突出させた状態で、固定鉄芯３１が取り付けられる。このとき、第３弾性部材３８が固定鉄芯３１のフランジ部３１ｂと継鉄板１３との間に介装される。このようにして固定鉄芯３１が取り付けられた継鉄板１３には、ストッパキャップ３２が、連通孔３２ａを固定鉄芯３１の挿通孔３１ａに連通させるとともに、固定鉄芯３１の一端部を覆うようにして、継鉄板１３に気密接合され、これにより固定鉄芯３１が継鉄板１３に固定される。このとき、第４弾性部材３９が、固定鉄芯３１のフランジ部３１ｂとストッパキャップ３２との間に介装される。   On the other hand, on the yoke plate 13, the flange portion 30 b is made to face the surface (upper surface in FIG. 1) facing the movable contact 12 in the yoke plate 13, and the other end is moved from the hole 13 a to the movable contact 12 on the yoke plate 13. The fixed iron core 31 is attached in a state of projecting toward the surface (the lower surface in FIG. 1) that does not face the surface. At this time, the third elastic member 38 is interposed between the flange portion 31 b of the fixed iron core 31 and the yoke plate 13. In the yoke plate 13 to which the fixed iron core 31 is thus attached, the stopper cap 32 communicates the communication hole 32a with the insertion hole 31a of the fixed iron core 31 and covers one end of the fixed iron core 31. Thus, the yoke plate 13 is hermetically joined, and thereby the fixed iron core 31 is fixed to the yoke plate 13. At this time, the fourth elastic member 39 is interposed between the flange portion 31 b of the fixed iron core 31 and the stopper cap 32.

この後に、シャフト３０の軸部３０ｂを、可動接触子１２のシャフト挿通孔１２ａ、ストッパキャップ３２の連通孔３２ａ、第４弾性部材３９のシャフト挿通孔３９ａ、固定鉄芯３１の挿通孔３１ａの順に挿通させる。同時に、第１コイルばね２０の一端部を可動接触子１２の保持孔１２ｂ内に挿入するとともに、他端部にストッパキャップ３２のリブ３２ｅを嵌入することで、第１コイルばね２０を可動接触子１２とストッパキャップ３２との間に介装し、第２コイルばね２１の一端部を可動接触子１２の保持孔１２ｂに嵌入するとともに、他端部をストッパキャップ３２の円盤部３２ｃに当接させることで、第２コイルばね２１を可動接触子１２とストッパキャップ３２との間に介装する。これにより、コイルばね２０，２１は、中心軸を一致させた状態で、可動接触子１２とストッパキャップ３２の円盤部３２ｃとの間に介装され、第１コイルばね２０がストッパキャップ３２に、第２コイルばね２１が可動接触子１２にそれぞれ固定されることで、これらコイルばね２０，２１の脱落が防止されている。   Thereafter, the shaft portion 30b of the shaft 30 is arranged in the order of the shaft insertion hole 12a of the movable contact 12, the communication hole 32a of the stopper cap 32, the shaft insertion hole 39a of the fourth elastic member 39, and the insertion hole 31a of the fixed iron core 31. Insert. At the same time, one end portion of the first coil spring 20 is inserted into the holding hole 12b of the movable contact 12, and the rib 32e of the stopper cap 32 is fitted into the other end portion, whereby the first coil spring 20 is moved to the movable contact. 12 and the stopper cap 32, one end of the second coil spring 21 is fitted into the holding hole 12b of the movable contact 12, and the other end is brought into contact with the disk portion 32c of the stopper cap 32. Thus, the second coil spring 21 is interposed between the movable contact 12 and the stopper cap 32. As a result, the coil springs 20 and 21 are interposed between the movable contact 12 and the disk portion 32c of the stopper cap 32 in a state where the central axes coincide with each other, and the first coil spring 20 is attached to the stopper cap 32. Since the second coil spring 21 is fixed to the movable contact 12, the coil springs 20 and 21 are prevented from falling off.

固定鉄芯３１の挿通孔３１ａにおける上記の収納室には、復帰ばね３５が収納され、固定鉄芯３１の挿通孔３１ａを挿通したシャフト３０の軸部３０ｂの他端部は、可動鉄芯３３の孔部３３ａに挿入、固定される。このとき、第２弾性部材３７が、可動鉄芯３３において固定鉄芯３０と対向する面に設けられる。そして、継鉄板１３には、プランジャキャップ３４が、固定鉄芯３１及び可動鉄芯３３を内部に収納した状態で、フランジ部３４ｃを継鉄板１３にレーザー溶接等により気密接合することで取り付けられ、プランジャキャップ３４の底部３４ｂと可動鉄芯３４との間には、第１弾性部材３６が介装される。   A return spring 35 is accommodated in the storage chamber in the insertion hole 31 a of the fixed iron core 31, and the other end portion of the shaft portion 30 b of the shaft 30 inserted through the insertion hole 31 a of the fixed iron core 31 is the movable iron core 33. Is inserted and fixed in the hole 33a. At this time, the second elastic member 37 is provided on the surface of the movable iron core 33 that faces the fixed iron core 30. A plunger cap 34 is attached to the yoke plate 13 by airtightly joining the flange portion 34c to the yoke plate 13 by laser welding or the like in a state where the fixed iron core 31 and the movable iron core 33 are housed inside. A first elastic member 36 is interposed between the bottom 34 b of the plunger cap 34 and the movable iron core 34.

以上述べたように、可動接触子１２、第１及び第２コイルばね２０，２１、シャフト３０、固定鉄芯３１、ストッパキャップ３２、可動鉄芯３３、プランジャキャップ３４、復帰ばね３５、及び第１〜第４弾性部材３６〜３９が取り付けられた継鉄板１３は、封止部材１４を用いて封止容器１０に取り付けられる。この取り付けは、封止部材１４の一端側を封止容器１０の開口１０ａの縁部にロウ等の気密封止材を用いて気密接合するとともに、他端側を継鉄板１３において封止容器１０と対向する面にロウ等の気密封止材を用いて気密接合することで行われ、このとき、封止容器１０内に、固定接点１１ａ，１１ａ及び可動接触子１２間に生じるアークを短時間で消すためにガスが封入される。尚、このようなガスとしては、アークが発生する温度領域で最も熱伝導に優れた水素ガスを主体とした混合ガスが用いられる。   As described above, the movable contact 12, the first and second coil springs 20 and 21, the shaft 30, the fixed iron core 31, the stopper cap 32, the movable iron core 33, the plunger cap 34, the return spring 35, and the first The yoke plate 13 to which the fourth elastic members 36 to 39 are attached is attached to the sealed container 10 using the sealing member 14. In this attachment, one end side of the sealing member 14 is hermetically joined to the edge of the opening 10 a of the sealing container 10 by using a hermetic sealing material such as wax, and the other end side is connected to the sealing container 10 at the yoke plate 13. Is performed by airtight bonding using a hermetic sealing material such as wax, and at this time, an arc generated between the fixed contacts 11a and 11a and the movable contact 12 is generated in the sealing container 10 for a short time. Gas is sealed to turn off. In addition, as such a gas, a mixed gas mainly composed of hydrogen gas having the highest thermal conductivity in a temperature range where an arc is generated is used.

このようにして構成された封止ブロック１は、初期状態では、可動鉄芯３３がプランジャキャップ３４の底部３４ｂに設けられた第１弾性部材３６に当接した状態で収納されている。また、可動接触子１２は、接圧付与手段２の付勢力によって固定接点１１ａ，１１ａ側へ移動しようとするも、シャフト３０の規制部３０ａによって固定接点１１ａ，１１ａ側への移動が規制されるため、固定接点１１ａ，１１ａから離間した状態、すなわち接点オフの状態となっている。したがって、本実施形態の接点装置Ａは、常開型（ノーマリーオフ）の封止接点装置である。   The sealing block 1 configured as described above is stored in a state where the movable iron core 33 is in contact with the first elastic member 36 provided on the bottom 34b of the plunger cap 34 in the initial state. Further, although the movable contact 12 tries to move toward the fixed contacts 11a and 11a by the urging force of the contact pressure applying means 2, the movement toward the fixed contacts 11a and 11a is restricted by the restricting portion 30a of the shaft 30. For this reason, it is in a state of being separated from the fixed contacts 11a, 11a, that is, in a contact-off state. Therefore, the contact device A of this embodiment is a normally open type (normally off) sealed contact device.

次に、駆動ブロック４について説明する。駆動ブロック４は、図１に示すように、前述の継鉄部５と、電磁駆動部６とを備え、電磁駆動部６のコイル６０に電流を流して励磁することにより、可動鉄芯３３を固定鉄芯３１に吸引させ、これにより規制手段３による可動接触子１２の規制を解除するように構成されている。   Next, the drive block 4 will be described. As shown in FIG. 1, the drive block 4 includes the yoke portion 5 and the electromagnetic drive portion 6 described above, and excites the movable iron core 33 by flowing current through the coil 60 of the electromagnetic drive portion 6 to excite it. The fixed iron core 31 is sucked, and thereby the restriction of the movable contact 12 by the restriction means 3 is released.

継鉄部５は、継鉄板１３、固定鉄芯３１及び可動鉄芯３３とともに磁気回路を構成するものであり、図１に示すように、ヨーク５０と、ブッシュ５１とを備えている。ヨーク５０は、鉄等の磁性金属材料により略コ字状に形成されている。さらに詳しく説明すると、ヨーク５０は、互いに並行配置された側板５０ａ，５０ａと、両側板５０ａ，５０ａの基端部を連結する連結板５０ｂとを一体に備えている。各側板５０ａ，５０ａの先端部には、継鉄板１３の嵌合用突起１３ｂと凹凸嵌合される嵌合凹部５０ｃ，５０ｃがそれぞれ形成されている。また、連結板５０ｂの略中央部には、ブッシュ５１が挿通される挿通孔５０ｄが形成されている。ブッシュ５１は、ヨーク５０と可動鉄芯３３間の磁気効率を高めるためのものであり、ヨーク５０と同様に、鉄等の磁性金属材料を用いて円筒状に形成され、プランジャキャップ３４の外径と同程度の内径を有するとともに、挿通孔５０ｄの内径と同程度の外径を有する円筒部５１ａと、円筒部５１ａの一端部から外方に突出するフランジ部５１ｂとを一体に備えている。   The yoke part 5 constitutes a magnetic circuit together with the yoke plate 13, the fixed iron core 31, and the movable iron core 33, and includes a yoke 50 and a bush 51 as shown in FIG. The yoke 50 is formed in a substantially U shape from a magnetic metal material such as iron. More specifically, the yoke 50 is integrally provided with side plates 50a, 50a arranged in parallel with each other and a connecting plate 50b for connecting the base end portions of the side plates 50a, 50a. At the front ends of the side plates 50a, 50a, fitting recesses 50c, 50c are formed, which are engaged with the fitting projections 13b of the yoke plate 13, respectively. Further, an insertion hole 50d through which the bush 51 is inserted is formed at a substantially central portion of the connecting plate 50b. The bush 51 is for increasing the magnetic efficiency between the yoke 50 and the movable iron core 33. Like the yoke 50, the bush 51 is formed in a cylindrical shape using a magnetic metal material such as iron, and the outer diameter of the plunger cap 34. And a cylindrical portion 51a having an outer diameter comparable to the inner diameter of the insertion hole 50d, and a flange portion 51b projecting outward from one end of the cylindrical portion 51a.

電磁駆動部６は、図１に示すように、コイル６０と、該コイル６０が巻装されるコイルボビン６１とを備えており、電磁駆動部６の大きさは、継鉄部５の両側板５０ａ，５０ａ及び連結板５０ｂで囲まれる空間部に収まる程度の大きさに設定されている。コイルボビン６１は、絶縁性材料を用いて形成され、コイル６０が巻装される略円筒状の巻胴部６１ａと、巻胴部６１ａの軸方向両端部にそれぞれ形成される略円板状の鍔部６１ｂ，６１ｂと一体に備えている。ここで、一方の鍔部６１ｂ（図１における下端側の鍔部）には、図３に示すように、コイル６０の端部を絡げるための絡げ分６１ｃが一体に突設されている。また、このコイルボビン６１には、プランジャキャップ３４が貫挿される断面円形状の孔部６１ｄが軸方向に貫設されており、この孔部６１ｄは、内径がブッシュ５１の円筒部５１ａの外径と同程度の大きさに設定されており、これによりプランジャキャップ３４との間にブッシュ５１を挿入できるようになっている。   As shown in FIG. 1, the electromagnetic drive unit 6 includes a coil 60 and a coil bobbin 61 around which the coil 60 is wound, and the size of the electromagnetic drive unit 6 is the both side plates 50 a of the yoke portion 5. , 50a and the connecting plate 50b are set to a size that fits in the space. The coil bobbin 61 is formed using an insulating material, and has a substantially cylindrical winding drum portion 61a around which the coil 60 is wound, and substantially disc-shaped hooks formed at both axial ends of the winding drum portion 61a. It is provided integrally with the parts 61b and 61b. Here, as shown in FIG. 3, a binding portion 61c for binding the end portion of the coil 60 is integrally provided on one of the flange portions 61b (the flange portion on the lower end side in FIG. 1). Yes. The coil bobbin 61 is provided with a hole 61d having a circular cross section through which the plunger cap 34 is inserted in the axial direction. The hole 61d has an inner diameter that is equal to the outer diameter of the cylindrical portion 51a of the bush 51. The size is set to be approximately the same, so that the bush 51 can be inserted between the plunger cap 34 and the plunger cap 34.

以上述べた継鉄部５及び電磁駆動部６からなる駆動ブロック４は、次のようにして封止ブロック１に取り付けられる。すなわち、電磁駆動部６は、コイルボビン６１の孔部６１ｄ内に、プランジャキャップ３４を挿入した状態で、封止ブロック１に取り付けられる。継鉄部５のヨーク５０は、プランジャキャップ３４を連結板５０ｂの挿通孔５０ｄに挿通させた状態で、各側板５０ａ，５０ａの嵌合用凹部５０ｃ，５０ｃと、継鉄板１３の各嵌合用突起１３ｂ，１３ｂとをそれぞれ凹凸嵌合させることで接点ブロック１に取り付けられ、ブッシュ５１は、プランジャキャップ３４とコイルボビン６１の孔部６１ｄの内周面との隙間に円筒部５１ａを挿入するとともに、フランジ部５１ｂを連結板５０ｂに当接させた状態で、接点ブロック１に取り付けられる。   The drive block 4 composed of the yoke part 5 and the electromagnetic drive part 6 described above is attached to the sealing block 1 as follows. That is, the electromagnetic drive unit 6 is attached to the sealing block 1 with the plunger cap 34 inserted into the hole 61 d of the coil bobbin 61. The yoke 50 of the yoke portion 5 has the fitting recesses 50c, 50c of the side plates 50a, 50a and the fitting protrusions 13b of the yoke plate 13 with the plunger cap 34 inserted through the insertion hole 50d of the connecting plate 50b. , 13b are respectively attached to the contact block 1 by engaging the concave and convex portions, and the bush 51 inserts the cylindrical portion 51a into the gap between the plunger cap 34 and the inner peripheral surface of the hole 61d of the coil bobbin 61, and the flange portion. It is attached to the contact block 1 in a state where 51b is in contact with the connecting plate 50b.

これにより図３に示すように、封止ブロック１に駆動ブロック４が取り付けられ、これらが、図示しないハウジングに収納されることで、本実施形態の接点装置Ａが完成することになる。尚、図３ではコイル６０の図示を省略している。   As a result, as shown in FIG. 3, the drive block 4 is attached to the sealing block 1, and these are housed in a housing (not shown), whereby the contact device A of the present embodiment is completed. In FIG. 3, the coil 60 is not shown.

次に、本実施形態の接点装置Ａの動作について説明する。本実施形態の接点装置Ａは、上述したように常開型のものであり、初期状態では、接圧付与手段２により固定接点１１ａ，１１ａ側へ付勢されている可動接触子１２の移動をシャフト３０の規制部３０ａによって規制して、固定接点１１ａ，１１ａから可動接触子１２が離間した状態となっている。   Next, operation | movement of the contact apparatus A of this embodiment is demonstrated. The contact device A of this embodiment is a normally open type as described above, and in the initial state, the movable contact 12 that is biased toward the fixed contacts 11a and 11a by the contact pressure applying means 2 is moved. The movable contact 12 is in a state of being separated from the fixed contacts 11 a and 11 a by being restricted by the restriction portion 30 a of the shaft 30.

そして、駆動ブロック４のコイル６０に電流を流して励磁すると、可動鉄芯３３が固定鉄芯３１に吸引されて、復帰ばね３５の付勢に逆らって可動鉄芯３３がシャフト３０とともに継鉄部１３に近接する方向（図１における上方向）へ移動していく。これに伴って、シャフト３０の規制部３０ａによる可動接触子１２の固定接点１１ａ，１１ａ側への移動規制が解除されていき、やがて、接圧付与手段２の付勢によって可動接触子１２は各固定接点１１ａ，１１ａにそれぞれ当接する位置まで移動させられて、接点オンとなる。そして、この状態では、可動接触子１２は、接圧付与手段２により与えられる接圧によって固定接点１１ａ，１１ａに接触することになる。   When the coil 60 of the drive block 4 is energized by exciting the movable iron core 33, the movable iron core 33 is attracted to the fixed iron core 31, and the movable iron core 33 is moved together with the shaft 30 against the biasing force of the return spring 35. 13 moves in the direction approaching 13 (the upward direction in FIG. 1). Along with this, the movement restriction of the movable contact 12 to the fixed contacts 11a, 11a side by the restriction portion 30a of the shaft 30 is released, and eventually the movable contact 12 is moved by the urging force of the contact pressure applying means 2. The contacts are moved to the positions where they come into contact with the fixed contacts 11a and 11a, respectively, and the contacts are turned on. In this state, the movable contact 12 comes into contact with the fixed contacts 11 a and 11 a by the contact pressure applied by the contact pressure applying means 2.

一方、駆動ブロック４のコイル６０の励磁が切られると、可動鉄芯３３は固定鉄芯３１側に吸引されなくなって、復帰ばね３５の付勢力によって、継鉄部１３から離間する方向（図１における下方向）へ移動していく。これに伴ってシャフト３０の規制部３０ａが可動接触子１２を接圧付与手段２の付勢力に逆らう方向へ移動させて、可動接触子１２を固定接点１１ａ，１１ａから引き離し、初期状態へと復帰する。   On the other hand, when the excitation of the coil 60 of the drive block 4 is cut off, the movable iron core 33 is not attracted to the fixed iron core 31 side and is separated from the yoke portion 13 by the urging force of the return spring 35 (FIG. 1). Move downward). Along with this, the restricting portion 30a of the shaft 30 moves the movable contact 12 in a direction against the urging force of the contact pressure applying means 2, pulls the movable contact 12 away from the fixed contacts 11a, 11a, and returns to the initial state. To do.

ここで、可動接触子１２が固定接点１１ａ，１１ａから引き離された際には、上述したようにアークが発生することになるが、このアークは封止容器１０内に封入されたガスによって冷却されることで、速やかに遮断される。つまり、本実施形態の接点装置Ａでは、封止容器１０内に封入したガスによる冷却によってアーク対策が講じられている。   Here, when the movable contact 12 is separated from the fixed contacts 11a and 11a, an arc is generated as described above. This arc is cooled by the gas sealed in the sealing container 10. It will be promptly shut off. That is, in the contact device A of the present embodiment, an arc countermeasure is taken by cooling with the gas sealed in the sealing container 10.

以上述べた本実施形態の接点装置Ａによれば、可動接触子１２を固定接点１１ａ，１１ａに所定の接圧で接触させる接圧付与手段２が、２つのコイルばね２０，２１からなるので、可動接触子１２が固定接点１１ａに接触した際の接圧の大きさを、２つのコイルばね２０，２１のそれぞれのばね定数によって設定することができ、これにより、例えば接圧付与手段２の配置スペースの都合上、コイルばね２０，２１の長さ（コイルばねのばね定数の最大値）が限られている場合でも、可動接触子１２を固定接点１１ａに所望の接圧で接触させることができるという効果を奏する。   According to the contact device A of the present embodiment described above, the contact pressure applying means 2 for bringing the movable contact 12 into contact with the fixed contacts 11a and 11a with a predetermined contact pressure includes the two coil springs 20 and 21. The magnitude of the contact pressure when the movable contact 12 comes into contact with the fixed contact 11a can be set by the respective spring constants of the two coil springs 20 and 21, whereby, for example, the arrangement of the contact pressure applying means 2 is arranged. Even when the length of the coil springs 20 and 21 (the maximum value of the spring constant of the coil spring) is limited due to space limitations, the movable contact 12 can be brought into contact with the fixed contact 11a with a desired contact pressure. There is an effect.

このように本実施形態の接点装置Ａでは、可動接触子１２を固定接点１１ａに所望の接圧で接触させることができるから、電流容量を大きくして、可動接触子１２と固定接点１１ａとの所望の接触面積が得られ、通電性能が低下することを防止でき、電流容量が大きい接点装置（すなわち大容量の接点装置）の設計が可能になる。   As described above, in the contact device A of the present embodiment, the movable contact 12 can be brought into contact with the fixed contact 11a with a desired contact pressure. Therefore, the current capacity is increased and the movable contact 12 and the fixed contact 11a are contacted. A desired contact area can be obtained, and it is possible to prevent the energization performance from deteriorating, and it is possible to design a contact device having a large current capacity (that is, a large-capacity contact device).

尚、本実施形態の接点装置Ａでは、接圧付与手段２を、２つのコイルばね２０，２１を用いて構成しているが、もちろん、３つのコイルばねで構成するようにしてもよく、さらに多くのコイルばねを用いるようにしてもよい。   In the contact device A of the present embodiment, the contact pressure applying means 2 is configured by using the two coil springs 20 and 21, but of course, it may be configured by three coil springs. Many coil springs may be used.

本発明の一実施形態の接点装置の要部の概略断面図である。It is a schematic sectional drawing of the principal part of the contact apparatus of one Embodiment of this invention. 同上の接点装置の要部の分解斜視図である。It is a disassembled perspective view of the principal part of a contact device same as the above. 同上の接点装置の要部の斜視図である。It is a perspective view of the principal part of a contact device same as the above. 従来の接点装置の要部の概略断面図である。It is a schematic sectional drawing of the principal part of the conventional contact apparatus.

符号の説明Explanation of symbols

１ 接点ブロック
１０ 封止容器
１１ａ 固定接点
１２ 可動接触子
２ 接圧付与手段
２０ 第１コイルばね
２１ 第２コイルばね
３ 規制手段
４ 駆動ブロック
Ａ 接点装置 DESCRIPTION OF SYMBOLS 1 Contact block 10 Sealing container 11a Fixed contact 12 Movable contact 2 Contact pressure provision means 20 1st coil spring 21 2nd coil spring 3 Control means 4 Drive block A Contact device

Claims (1)

絶縁材料製の封止容器と、該封止容器内に配置される固定接点と、固定接点に接離するように封止容器内に配置される可動接触子と、可動接触子を固定接点側に付勢し、可動接触子を所定の接圧で固定接点に接触させる接圧付与手段と、可動接触子の固定接点側への移動を規制して、可動接触子を固定接点から離間した状態に保持する規制手段とを備える接点ブロック、及び規制手段による可動接触子の移動規制を解除して可動接触子を固定接点に接触させる駆動ブロックを有し、接圧付与手段は、可動接触子を固定接点側に付勢する複数のコイルばねからなることを特徴とする接点装置。   A sealing container made of an insulating material, a fixed contact disposed in the sealing container, a movable contact disposed in the sealing container so as to be in contact with and away from the fixed contact, and the movable contact on the fixed contact side And a contact pressure applying means for bringing the movable contact into contact with the fixed contact with a predetermined contact pressure, and the movement of the movable contact to the fixed contact side is restricted, and the movable contact is separated from the fixed contact. And a drive block for releasing the movement restriction of the movable contact by the restriction means and bringing the movable contact into contact with the fixed contact. A contact device comprising a plurality of coil springs biased toward the fixed contact side.
JP2006114888A 2006-04-18 2006-04-18 Contact device Withdrawn JP2007287526A (en)

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