JP2006261056A

JP2006261056A - Sealed contact device

Info

Publication number: JP2006261056A
Application number: JP2005080109A
Authority: JP
Inventors: Katsuya Konama; 克哉粉間; Ritsu Yamamoto; 律山本; Riichi Uotome; 利一魚留
Original assignee: Matsushita Electric Works Ltd
Current assignee: Panasonic Electric Works Co Ltd
Priority date: 2005-03-18
Filing date: 2005-03-18
Publication date: 2006-09-28
Anticipated expiration: 2025-03-18
Also published as: JP4466421B2

Abstract

<P>PROBLEM TO BE SOLVED: To provide a sealed contact device capable of reducing variation in performance and realizing low cost. <P>SOLUTION: The sealed contact device has a sealed contact part 1 comprising a fixed contact 12a arranged in a sealed container 11, a movable contactor 13 having a movable contact 13a to contact and separate from the fixed contact 12a, a yoke part 14 which has a through hole 14a and is jointed airtightly to an opening 11a of the sealed container 11, a shaft 15 which penetrates the through hole 14a in free movement and has a regulating part 15a at one end that regulates movement of the movable contactor 13 to the fixed contact 12a side, a movable iron core 16 which is arranged at one face side of the yoke part 14 and to which the other end of the shaft 15 is fixed and moves so that the both contacts 12a, 13a may be contacted or separated, a contact pressure spring 18 which is interposed between the other face of the yoke part 14 and the movable contactor 13 and energizes the movable contactor 13 to the fixed contact 12a side, and a return spring 19 which is interposed between one face of the yoke part 14 and the movable iron core 16 and energizes the movable iron core 16 to the direction separating from the yoke part 14. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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封止接点装置に関する。 The present invention relates to a sealed contact device used for a power load relay, an electromagnetic switch or the like.

従来から、この種の封止接点装置としては、特開２００３−１９７０８２号公報に示すものが提供されており、以下にこの封止接点装置について図１１を用いて説明する。 Conventionally, as this type of sealed contact device, one disclosed in Japanese Patent Application Laid-Open No. 2003-197082 has been provided, and this sealed contact device will be described below with reference to FIG.

この封止接点装置は、図１１に示すように、一面が開口した絶縁材料製の封止容器１０１と、封止容器１０１内に配置される固定接点１０２ａを備えて封止容器１０１の他面部に気密接合される一対の固定端子１０２，１０２と、両固定接点１０２ａ，１０２ａにそれぞれ接離する可動接点１０３ａ，１０３ａを備えて封止容器１０１内に配置される可動接触子１０３と、両可動接点１０３ａ，１０３ａを露出させた状態で可動接触子１０３を収納する可動接触子ホルダーＨと、挿通孔１０４ａを備えて封止容器１０１の開口１０１ａに気密接合される継鉄部１０４と、挿通孔１０４ａを移動自在に挿通して一端が可動接触子ホルダーＨに連結されるシャフト１０５と、継鉄部１０４の一面側に配置されるとともにシャフト１０５の他端が固定されて固定接点１０２ａに可動接点１０３ａが接離するように移動する可動鉄芯１０６と、可動鉄芯１０６を移動自在に収納して継鉄部１０４の一面側に気密接合される磁性材料製のキャップ部１０７と、可動接触子ホルダーＨ内に収納され可動接触子１０３を固定接点１０２ａ側へ付勢する接圧ばね１０８と、継鉄部１０４の一面と可動鉄芯１０６との間に介装され可動鉄芯１０６を継鉄部１０４から離間する方向へ付勢する復帰ばね１０９とからなる封止接点部１００、及び、封止接点部１００の可動鉄芯１０６を駆動するコイル等を有する電磁駆動部（図示せず）を備えている。
特開２００３−１９７０８２号公報（第１図） As shown in FIG. 11, this sealing contact device includes a sealing container 101 made of an insulating material whose one surface is open, and a fixed contact 102 a disposed in the sealing container 101, and the other surface portion of the sealing container 101. A pair of fixed terminals 102 and 102 that are hermetically bonded to each other, and movable contacts 103a and 103a that are provided in the sealing container 101 with movable contacts 103a and 103a that are in contact with and away from the fixed contacts 102a and 102a, respectively. A movable contact holder H that houses the movable contact 103 with the contacts 103a and 103a exposed, a yoke portion 104 that has an insertion hole 104a and is hermetically joined to the opening 101a of the sealing container 101, and an insertion hole A shaft 105 that is movably inserted through 104a and one end of which is connected to the movable contact holder H is disposed on one surface side of the yoke 104, and the other end of the shaft 105 is fixed. The movable iron core 106 moves so that the movable contact 103a contacts and separates from the fixed contact 102a, and the movable iron core 106 is movably accommodated and is made of a magnetic material that is hermetically joined to one surface side of the yoke portion 104. A cap 107, a contact pressure spring 108 that is housed in the movable contact holder H and biases the movable contact 103 toward the fixed contact 102 a, and is interposed between one surface of the yoke 104 and the movable iron core 106. And an electromagnetic having a sealed contact portion 100 including a return spring 109 that urges the movable iron core 106 in a direction away from the yoke portion 104, a coil that drives the movable iron core 106 of the sealed contact portion 100, and the like. A drive unit (not shown) is provided.
Japanese Patent Laying-Open No. 2003-197082 (FIG. 1)

この封止接点装置は、常開型のものであり、初期状態では図１１に示すように、固定接点１０２ａと可動接点１０３ａとが離間した状態となっている。そして、電磁駆動部のコイルが励磁されると、可動鉄芯１０６が継鉄部１０４に吸引されて、復帰ばね１０９の付勢に逆らって可動鉄芯１０６が継鉄部１０４に近接する方向（図１１における上方向）へ移動していく。このとき、可動鉄芯１０６に固定されているシャフト１０５、及びシャフト１０５の一端に連結されている可動接触子ホルダーＨも固定接点１０２ａ側に移動していき、やがて可動接触子１０３の可動接点１０３ａ，１０３ａがそれぞれ対応する固定接点１０２ａ，１０２ａに当接して、接点オンとなる。この状態からさらに可動鉄芯１０６が継鉄部１０４側へ移動する、いわゆるオーバートラベル時には、復帰ばね１０９に加えて接圧ばね１０８が撓められていき、これにより両接点１０２ａ，１０３ａが所定の接圧力で当接する。 This sealed contact device is of a normally open type. In the initial state, as shown in FIG. 11, the fixed contact 102a and the movable contact 103a are in a separated state. When the coil of the electromagnetic drive unit is excited, the movable iron core 106 is attracted to the yoke portion 104 and the movable iron core 106 approaches the yoke portion 104 against the bias of the return spring 109 ( It moves in the upward direction in FIG. At this time, the shaft 105 fixed to the movable iron core 106 and the movable contact holder H connected to one end of the shaft 105 also move to the fixed contact 102 a side, and eventually the movable contact 103 a of the movable contact 103. , 103a abuts on the corresponding fixed contacts 102a, 102a to turn on the contacts. At the time of so-called overtravel in which the movable iron core 106 further moves to the yoke portion 104 side from this state, the contact pressure spring 108 is deflected in addition to the return spring 109, whereby both the contacts 102a and 103a are predetermined. Contact with contact pressure.

そして、電磁駆動部のコイルの励磁が切られると、可動鉄芯１０６は、接圧ばね１０８と復帰ばね１０９の付勢力によって、継鉄部１０４から離間する方向（図１１における下方向）へ移動し、これに伴なって可動接点１０３ａが固定接点１０２ａから離間し、初期状態へと復帰する。 When the excitation of the coil of the electromagnetic drive unit is cut, the movable iron core 106 moves in a direction away from the yoke portion 104 (downward direction in FIG. 11) by the biasing force of the contact pressure spring 108 and the return spring 109. As a result, the movable contact 103a is separated from the fixed contact 102a and returns to the initial state.

このような動作時に、可動鉄芯１０６の移動量（ストローク）Ｓに対して可動鉄芯１０６にかかる負荷Ｆは、図１２のようになる。尚、図中Ｋ１は復帰ばね１０９の負荷を示し、Ｋ２は接圧ばね１０８の負荷を示し、Ｋ３は各ばね１０８，１０９の合成負荷（すなわち、可動鉄芯１０６を移動量Ｓだけ移動させるのに必要な力）を示している。また、Ｓ０は可動鉄芯１０６の移動量が０の初期状態であり、Ｓ１は両接点１０２ａ，１０３ａ間の接点ギャップであり、Ｓ２は可動鉄芯１０６の移動量の限界値である。 During such operation, the load F applied to the movable iron core 106 with respect to the movement amount (stroke) S of the movable iron core 106 is as shown in FIG. In the figure, K1 indicates the load of the return spring 109, K2 indicates the load of the contact pressure spring 108, and K3 indicates the combined load of the springs 108 and 109 (that is, the movable iron core 106 is moved by the moving amount S). Required force). Further, S0 is an initial state in which the moving amount of the movable iron core 106 is 0, S1 is a contact gap between both the contacts 102a and 103a, and S2 is a limit value of the moving amount of the movable iron core 106.

つまり、この封止接点装置では、接点オンとなるまでは、復帰ばね１０９の負荷Ｋ１のみが可動鉄芯１０６にかかり、接点オンとなった後は、復帰ばね１０９の負荷Ｋ１に加えて接圧ばね１０８の負荷Ｋ２が可動鉄芯１０６にかかることになる。したがって、図１２に示すように、接点オン状態を安定して維持するには、少なくとも、可動鉄芯１０６の移動量がＳ１であるときの合成負荷Ｋ３の値、すなわち接点オン時の最低負荷Ｆ１を越える力が必要となる。 That is, in this sealed contact device, only the load K1 of the return spring 109 is applied to the movable iron core 106 until the contact is turned on, and after the contact is turned on, the contact pressure is applied in addition to the load K1 of the return spring 109. The load K2 of the spring 108 is applied to the movable iron core 106. Therefore, as shown in FIG. 12, in order to stably maintain the contact-on state, at least the value of the combined load K3 when the moving amount of the movable iron core 106 is S1, that is, the minimum load F1 when the contact is on. The power that exceeds is required.

しかしながら、この従来の封止接点装置では、図１２に示すように、オーバートラベル時（Ｓ１〜Ｓ２間）に可動鉄芯１０６にかかる負荷Ｆは、接圧ばね１０８及び復帰ばね１０９の合成負荷Ｋ３であるので、この傾きは両ばね１０８，１０９のばね定数の合計となる。そのため、移動量Ｓに対する負荷Ｆの変化は、Ｓ０〜Ｓ１の接点オフ時に比べて大きくなっている。したがって、たとえば、組立誤差や、使用による接点消耗等によって、一方の接点ギャップが他方の接点ギャップよりも大きくなった際には、一方の接点を閉じるのに必要な負荷Ｆ１が急激に増減してしまう。そのため、装置毎に接点オンとなる負荷Ｆ１が大きい振れ幅でばらつき、これにより封止接点装置の性能がばらつくという問題が生じていた。 However, in this conventional sealed contact device, as shown in FIG. 12, the load F applied to the movable iron core 106 during overtravel (between S1 and S2) is a combined load K3 of the contact pressure spring 108 and the return spring 109. Therefore, this inclination is the sum of the spring constants of both springs 108 and 109. Therefore, the change of the load F with respect to the movement amount S is larger than that when the contacts S0 to S1 are turned off. Therefore, when one contact gap becomes larger than the other contact gap due to, for example, assembly error or contact consumption due to use, the load F1 required to close one contact increases or decreases rapidly. End up. For this reason, the load F1 at which the contact is turned on varies from device to device with a large fluctuation width, which causes a problem that the performance of the sealed contact device varies.

本発明は上述の点に鑑みて為されたもので、その目的は、性能のばらつきを低減でき、しかも低コスト化を図ることができる封止接点装置を提供することである。 The present invention has been made in view of the above-described points, and an object of the present invention is to provide a sealed contact device that can reduce performance variations and reduce costs.

上記の課題を解決するために、請求項１の封止接点装置では、一面が開口した絶縁材料製の封止容器と、封止容器内に配置される固定接点を備えて封止容器の他面部に気密接合される固定端子と、固定接点に接離する可動接点を備えて封止容器内に配置される可動接触子と、挿通孔を備えて封止容器の開口に気密接合される継鉄部と、挿通孔を移動自在に挿通して一端に可動接触子の固定接点側への移動を規制する規制部を備えるシャフトと、継鉄部の一面側に配置されるとともにシャフトの他端が固定されて固定接点に可動接点が接離するように移動する可動鉄芯と、可動鉄芯を移動自在に収納して継鉄部の一面側に気密接合されるキャップ部と、継鉄部の他面と可動接触子との間に介装され可動接触子を固定接点側へ付勢して可動接点を固定接点に接触させる接圧ばねと、継鉄部の一面と可動鉄芯との間に介装され可動鉄芯を継鉄部から離間する方向へ付勢する復帰ばねとからなる封止接点部、及び封止接点部の可動鉄芯を駆動させる電磁駆動部を備えていることを特徴とする。 In order to solve the above-mentioned problems, the sealed contact device according to claim 1 is provided with a sealed container made of an insulating material having an opening on one side and a fixed contact disposed in the sealed container, and the sealed container. A fixed terminal that is hermetically joined to the surface portion, a movable contact that is provided in the sealed container with a movable contact that contacts and separates from the fixed contact, and a joint that is hermetically joined to the opening of the sealed container with an insertion hole. A shaft provided with an iron portion, a restriction portion that is movably inserted through the insertion hole and restricts movement of the movable contact to the fixed contact side at one end, and the other end of the shaft is disposed on one surface side of the yoke portion A movable iron core that moves so that the movable contact contacts and separates from the fixed contact, a cap portion that movably houses the movable iron core and is hermetically joined to one side of the yoke portion, and the yoke portion The movable contact is interposed between the other surface and the movable contact to urge the movable contact toward the fixed contact. Sealed contact portion comprising a contact pressure spring that is brought into contact with the constant contact and a return spring that is interposed between one surface of the yoke portion and the movable iron core and biases the movable iron core in a direction away from the yoke portion. And an electromagnetic drive unit that drives the movable iron core of the sealing contact part.

請求項１の発明によれば、接圧ばねと復帰ばねとの付勢方向が互いに逆向きとなるようにしているので、接点オンとなるまでは、可動鉄芯の移動方向に対して反対方向の復帰ばねの負荷と、可動鉄芯の移動方向に対して順方向の接圧ばねの負荷との差が負荷として可動鉄芯にかかり、接点オンとなった後は、復帰ばねのみの負荷が可動鉄芯にかかることになる。そのため、接点オンとなった後（オーバートラベル時）の可動鉄芯の移動量に対する負荷の傾きが復帰ばねのばね定数となり、従来例のようにオーバートラベル時の負荷が接圧ばねと復帰ばねのばね定数の和となるものに比べて、移動量に対する負荷の変化を極めて小さくすることができる。これにより、封止接点装置の性能のばらつきを低減することができる。しかも、従来例の封止接点装置とは異なり、接圧ばね及び可動接触子を収納する可動接触子ホルダーが必要なくなるから、低コスト化を図ることができるという利点がある。 According to the first aspect of the present invention, since the urging directions of the contact pressure spring and the return spring are opposite to each other, the direction opposite to the moving direction of the movable iron core until the contact is turned on. The difference between the load of the return spring and the load of the contact pressure spring in the forward direction with respect to the moving direction of the movable iron core is applied to the movable iron core as a load. It will be applied to the movable iron core. Therefore, the slope of the load with respect to the moving amount of the movable iron core after the contact is turned on (during overtravel) becomes the spring constant of the return spring. Compared to the sum of the spring constants, the change in load with respect to the amount of movement can be made extremely small. Thereby, the dispersion | variation in the performance of a sealing contact apparatus can be reduced. In addition, unlike the conventional sealed contact device, there is no need for a movable contact holder for housing the contact pressure spring and the movable contact, so there is an advantage that the cost can be reduced.

請求項２の封止接点装置では、請求項１の構成に加えて、前記継鉄部の一面側に復帰ばねを固定する復帰ばね用固定部を一体に形成していることを特徴とする。 The sealed contact device according to a second aspect is characterized in that, in addition to the configuration of the first aspect, a return spring fixing portion for fixing the return spring is integrally formed on one surface side of the yoke portion.

請求項２の発明によれば、復帰ばね用固定部により復帰ばねを固定しているので、復帰ばねが継鉄部上を摺動することによる復帰ばねの位置ずれを抑制でき、これにより、ばねのかじ込み等の接点オン・オフ動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、復帰ばね用固定部を継鉄部に一体に形成しているので、部品点数を増加しなくて済み、これにより製造コストの増加を抑えることができる。 According to the invention of claim 2, since the return spring is fixed by the return spring fixing portion, it is possible to suppress displacement of the return spring due to the return spring sliding on the yoke portion. A stable operation can be obtained by avoiding an adverse effect on the contact ON / OFF operation such as the biting of the contact. In addition, since the return spring fixing portion is formed integrally with the yoke portion, it is not necessary to increase the number of components, thereby suppressing an increase in manufacturing cost.

請求項３の封止接点装置では、請求項１又は請求項２の構成に加えて、前記継鉄部の他面側に接圧ばねを固定する接圧ばね用固定部を一体に形成していることを特徴とする。 In the sealed contact device of claim 3, in addition to the configuration of claim 1 or claim 2, a contact pressure spring fixing portion for fixing the contact pressure spring is integrally formed on the other surface side of the yoke portion. It is characterized by being.

請求項３の発明によれば、接圧ばね用固定部により接圧ばねを固定しているので、接圧ばねが継鉄部上を摺動することによる接圧ばねの位置ずれを抑制でき、これにより、ばねのかじ込み等の接点オン・オフ動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、接圧ばね用固定部を継鉄部に一体に形成しているので、部品点数を増加しなくて済み、これにより製造コストの増加を抑えることができる。 According to the invention of claim 3, since the contact pressure spring is fixed by the contact pressure spring fixing portion, the displacement of the contact pressure spring due to the contact pressure spring sliding on the yoke portion can be suppressed. As a result, it is possible to avoid a bad influence on the contact on / off operation such as a spring biting and obtain a stable operation. In addition, since the contact pressure spring fixing portion is formed integrally with the yoke portion, it is not necessary to increase the number of components, thereby suppressing an increase in manufacturing cost.

請求項４の封止接点装置では、請求項１の構成に加えて、前記継鉄部に接圧ばねを固定するとともに復帰ばねを固定するばね固定部を一体に形成していることを特徴とする。 The sealed contact device according to claim 4 is characterized in that, in addition to the configuration of claim 1, a spring fixing portion for fixing a contact pressure spring to the yoke portion and fixing a return spring is integrally formed. To do.

請求項４の発明によれば、ばね固定部により復帰ばねと接圧ばねの両方を一括して固定しているので、両ばねが継鉄部上を摺動することによる両ばねの位置ずれを抑制でき、これにより、両ばねのかじ込み等の接点オン・オフ動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、ばね固定部を継鉄部に一体に形成しているので、部品点数が増加しなくて済み、さらに、１つのばね固定部によって両方のばねを固定しているので、継鉄部の両面側にそれぞれのばね用の固定部を設ける場合に比べて加工回数が１回で済み、これらにより製造コストの増加を抑えることができる。 According to the invention of claim 4, since both the return spring and the contact pressure spring are fixed together by the spring fixing portion, the positional deviation of both springs due to the two springs sliding on the yoke portion is prevented. Thus, it is possible to avoid an adverse effect on the contact on / off operation such as biting of both springs, and to obtain a stable operation. In addition, since the spring fixing part is formed integrally with the yoke part, the number of parts does not need to be increased, and both springs are fixed by one spring fixing part. Compared with the case where the fixing portions for the respective springs are provided on the side, the number of times of processing is one, and these can suppress an increase in manufacturing cost.

請求項５の封止接点装置では、請求項１乃至４のいずれか１項の構成に加えて、前記可動接触子に接圧ばねを固定する固定部を一体に形成していることを特徴とする。 The sealed contact device according to claim 5 is characterized in that, in addition to the configuration of any one of claims 1 to 4, a fixed portion for fixing a contact pressure spring is integrally formed on the movable contact. To do.

請求項５の発明によれば、固定部により接圧ばねを固定しているので、接圧ばねが可動接触子上を摺動することによる接圧ばねの位置ずれを抑制でき、これにより、ばねのかじ込み等の接点オン・オフ動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、固定部を可動接触子に一体に形成しているので、部品点数を増加しなくて済み、これにより製造コストの増加を抑えることができる。 According to the invention of claim 5, since the contact pressure spring is fixed by the fixing portion, the displacement of the contact pressure spring due to the contact pressure spring sliding on the movable contact can be suppressed. A stable operation can be obtained by avoiding an adverse effect on the contact ON / OFF operation such as the biting of the contact. In addition, since the fixed portion is formed integrally with the movable contact, it is not necessary to increase the number of parts, thereby suppressing an increase in manufacturing cost.

本発明は、接点オンとなった後は復帰ばねの負荷のみが可動鉄芯にかかるため、従来例のように接点オンとなった後の負荷が接圧ばねと復帰ばねのばね定数の和となるものに比べて、接点オン時の可動鉄芯の移動量に対する負荷の変化が小さくなり、これにより封止接点装置の性能のばらつきを低減することができるという効果があり、さらに、従来例の封止接点装置とは異なり、接圧ばね及び可動接触子を収納する可動接触子ホルダーが必要なくなるから、低コスト化を図ることができるという効果がある。 In the present invention, since only the load of the return spring is applied to the movable iron core after the contact is turned on, the load after the contact is turned on is the sum of the spring constants of the contact pressure spring and the return spring as in the conventional example. Compared to the above, the change in the load with respect to the moving amount of the movable iron core when the contact is turned on is reduced, which has the effect of reducing the variation in the performance of the sealed contact device. Unlike the sealed contact device, there is no need for a movable contact holder for housing the contact pressure spring and the movable contact, so that the cost can be reduced.

以下に、図１〜１０を参照して本発明の実施形態について説明する。 Hereinafter, embodiments of the present invention will be described with reference to FIGS.

（実施形態１）
本実施形態の封止接点装置は、初期状態において接点オフとなる所謂常開型のものであり、図３に示すように、固定接点及び可動接点を備えた封止接点部１と、封止接点部１を駆動する電磁駆動部２を構成する継鉄ブロック２０及びコイルブロック２３と、封止接点部１に生じるアークを短時間で消去するためのカプセルヨーク３と、これら封止接点部１、電磁駆動部２、及びカプセルヨーク３を収納するハウジング４とを備えている。 (Embodiment 1)
The sealed contact device of the present embodiment is a so-called normally-open type in which the contact is turned off in the initial state. As shown in FIG. 3, the sealed contact portion 1 having a fixed contact and a movable contact, The yoke block 20 and coil block 23 constituting the electromagnetic drive unit 2 for driving the contact unit 1, the capsule yoke 3 for erasing the arc generated in the sealed contact unit 1 in a short time, and these sealed contact units 1 And a housing 4 for housing the electromagnetic drive unit 2 and the capsule yoke 3.

封止接点部１は、図１に示すように、一面が開口した絶縁材料製の封止容器１１と、封止容器１１内に配置される固定接点１２ａを備えて封止容器１１の他面部に気密接合される一対の固定端子１２，１２と、両固定接点１２ａ，１２ａにそれぞれ接離する可動接点１３ａ，１３ａを備えて封止容器１１内に配置される可動接触子１３と、挿通孔１４ａを備えて封止容器１１の開口１１ａに気密接合される継鉄部１４と、挿通孔１４ａを移動自在に挿通して一端に可動接触子１３の固定接点１２ａ側への移動を規制する規制部１５ａを備えるシャフト１５と、継鉄部１４の一面側に配置されるとともにシャフト１５の他端が固定されて固定接点１２ａ，１２ａに可動接点１３ａ，１３ａが接離するように移動する可動鉄芯１６と、可動鉄芯１６を移動自在に収納して継鉄部１４の一面側に気密接合されるキャップ部１７と、継鉄部１４の他面と可動接触子１３との間に介装され可動接触子１３を固定接点１２ａ，１２ａ側へ付勢して可動接点１３ａ，１３ａを固定接点１２ａ，１２ａにそれぞれ接触させる接圧ばね１８と、継鉄部１４の一面と可動鉄芯１６との間に介装され可動鉄芯１６を継鉄部１４から離間する方向へ付勢する復帰ばね１９とで構成されている。 As shown in FIG. 1, the sealing contact portion 1 includes a sealing container 11 made of an insulating material whose one surface is open, and a fixed contact 12 a disposed in the sealing container 11, and the other surface portion of the sealing container 11. A pair of fixed terminals 12 and 12 that are hermetically bonded to each other, a movable contact 13 that is provided in the sealed container 11 with movable contacts 13a and 13a that are in contact with and away from the fixed contacts 12a and 12a, and an insertion hole. A yoke portion 14 provided with a seal 14 that is hermetically joined to the opening 11a of the sealed container 11 and a restriction that movably passes through the insertion hole 14a and restricts movement of the movable contact 13 toward the fixed contact 12a at one end. A movable iron that is arranged on one surface side of the shaft 15 having the portion 15a and the yoke portion 14 and moves so that the movable contacts 13a, 13a are in contact with and separated from the fixed contacts 12a, 12a with the other end of the shaft 15 fixed. Core 16 and movable iron core 1 Is movably stored and is hermetically joined to one surface side of the yoke portion 14, and the movable contact 13 is fixed between the other surface of the yoke portion 14 and the movable contact 13. 12a, 12a, a contact pressure spring 18 that urges the movable contacts 13a, 13a to contact the fixed contacts 12a, 12a, and a movable iron interposed between one surface of the yoke portion 14 and the movable iron core 16, respectively. It is comprised with the return spring 19 which urges | biases the core 16 in the direction away from the yoke part 14. As shown in FIG.

封止容器１１は、たとえばセラミック等の耐熱及び絶縁性を備えた材料から、一面側（図１における下面側）に開口１１ａを備えた箱状に形成され、他面側（図１における上面側）には固定端子１２，１２用の接点挿通孔１１ｂ，１１ｂが設けられている。 The sealing container 11 is formed in a box shape having an opening 11a on one surface side (lower surface side in FIG. 1) from a material having heat resistance and insulation, such as ceramic, and the other surface side (upper surface side in FIG. 1). ) Are provided with contact insertion holes 11b and 11b for the fixed terminals 12 and 12, respectively.

固定端子１２は、たとえば銅系材料等の導電性材料から形成され、長尺平板状の端子部１２ｂと、端子部１２ｂの長手方向一端側に面方向に突出するようにねじ止め等により固定された有底円筒状の円筒部１２ｃとを備え、この円筒部１２ｃの底部に固定接点１２ａが設けられている。また、端子部１２ｂの長手方向中腹部には、一対の嵌入片１２ｄ，１２ｄが突設されている。 The fixed terminal 12 is formed of a conductive material such as a copper-based material, for example, and is fixed by screws or the like so as to protrude in the surface direction to the long flat plate-like terminal portion 12b and one end side in the longitudinal direction of the terminal portion 12b. The bottomed cylindrical portion 12c is provided with a fixed contact 12a. In addition, a pair of insertion pieces 12d and 12d project from the middle portion of the terminal portion 12b in the longitudinal direction.

可動接触子１３は、たとえば銅系材料等の導電性材料から平板状に形成され、上記一対の固定端子１２と対向する面には、両固定接点１２ａ，１２ａとそれぞれ接離する可動接点１３ａ，１３ａが設けられている。また、可動接触子１３の略中央部には、シャフト１５が挿通されるシャフト挿通孔１３ｂが形成されている。 The movable contact 13 is formed in a flat plate shape from a conductive material such as a copper-based material, for example, and a movable contact 13a that contacts and separates from the fixed contacts 12a and 12a on the surface facing the pair of fixed terminals 12, respectively. 13a is provided. Further, a shaft insertion hole 13b through which the shaft 15 is inserted is formed at a substantially central portion of the movable contact 13.

継鉄部１４は、鉄等の磁性金属材料により少なくとも封止容器１１の開口１１ａを閉塞できる程度の大きさの平板状に形成され、可動鉄芯１６及び継鉄ブロック２０とともに磁気回路を形成する。また、継鉄部１４の略中央部には、シャフト１５が挿通される挿通孔１４ａが形成され、継鉄部１４の長手方向両側縁には、継鉄ブロック２０と嵌合するための嵌合用突起１４ｂが一体に突設されている。 The yoke portion 14 is formed in a flat plate size that can at least close the opening 11 a of the sealing container 11 with a magnetic metal material such as iron, and forms a magnetic circuit together with the movable iron core 16 and the yoke block 20. . In addition, an insertion hole 14 a through which the shaft 15 is inserted is formed in a substantially central portion of the yoke portion 14, and for fitting with the yoke block 20 on both side edges in the longitudinal direction of the yoke portion 14. The protrusion 14b is integrally protruded.

シャフト１５は、絶縁材料等から略丸棒状に形成されており、一端に可動接触子１３の可動接点１３ａが設けられた面に当接して、可動接触子１３の固定接点１２ａ側への移動を規制する略円板状の規制部１５ａが形成されている。また、シャフト１５の他端部はねじ溝（図示せず）が形成されている。 The shaft 15 is formed in a substantially round bar shape from an insulating material or the like, and abuts the surface of the movable contact 13 provided with the movable contact 13a at one end to move the movable contact 13 toward the fixed contact 12a. A substantially disc-shaped restricting portion 15a to be restricted is formed. Further, the other end portion of the shaft 15 is formed with a thread groove (not shown).

可動鉄芯（プランジャ）１６は、略円柱状に形成され、一端側に復帰ばね１９の一部が収納される大径穴部１６ａが設けられており、大径穴部１６ａの底部にはシャフト１５の他端部が挿入される小径孔部１６ｂが開口している。この小径孔部１６ｂの内周面には、シャフト１５のねじ溝に対応するねじ溝が形成されている。また、この可動鉄芯１６の外周面には、軸方向に図示しない溝部が形成されている。 The movable iron core (plunger) 16 is formed in a substantially cylindrical shape, and is provided with a large-diameter hole 16a in which a part of the return spring 19 is accommodated on one end side, and a shaft at the bottom of the large-diameter hole 16a. A small-diameter hole 16b into which the other end of 15 is inserted is opened. A thread groove corresponding to the thread groove of the shaft 15 is formed on the inner peripheral surface of the small diameter hole portion 16b. Further, on the outer peripheral surface of the movable iron core 16, a groove portion (not shown) is formed in the axial direction.

キャップ部（プランジャキャップ）１７は、たとえば非磁性材料から形成され、可動鉄芯１６の外径と略同寸法の内径を有する円筒部１７ａと、円筒部１７ａの一端開口を閉塞する底部１７ｂと、円筒部１７ａの他端開口縁部から外方へ突出するフランジ部１７ｃとを一体に備え、その軸方向の長さ寸法は、可動鉄芯１６の長さ寸法よりも大きくなるようにして、可動鉄芯１６の移動用スペースを確保している。また、このキャップ部１７の円筒部１７ａの内側面は、可動鉄芯１６が摺動する摺動面になっており、加えて上記可動鉄芯１６の図示しない溝部に対応する突部（図示せず）が軸方向に突設されており、可動鉄芯１６がキャップ部１７内を摺動する際に、回転等しないようにガイドしている。 The cap part (plunger cap) 17 is made of, for example, a nonmagnetic material, and has a cylindrical part 17a having an inner diameter substantially the same as the outer diameter of the movable iron core 16, a bottom part 17b that closes one end opening of the cylindrical part 17a, The cylindrical portion 17a is integrally provided with a flange portion 17c projecting outward from the opening edge of the other end of the cylindrical portion 17a. The axial length of the cylindrical portion 17a is movable to be larger than the length of the movable iron core 16. A space for moving the iron core 16 is secured. Further, the inner side surface of the cylindrical portion 17a of the cap portion 17 is a sliding surface on which the movable iron core 16 slides, and in addition, a protrusion (not shown) corresponding to a groove portion (not shown) of the movable iron core 16. ) Is projected in the axial direction and guides the movable iron core 16 so as not to rotate or the like when the movable iron core 16 slides in the cap portion 17.

接圧ばね１８は、たとえばコイルスプリング等であり、継鉄部１４の他面（図１における上面）と可動接触子１３との間に介装され可動接触子１３を固定接点１２ａ，１２ａ側へ付勢して可動接点１３ａ，１３ａを固定接点１２ａ，１２ａにそれぞれ接触させるためのものである。 The contact pressure spring 18 is, for example, a coil spring or the like, and is interposed between the other surface (upper surface in FIG. 1) of the yoke portion 14 and the movable contact 13, and moves the movable contact 13 toward the fixed contacts 12a and 12a. It is for energizing and making movable contact 13a, 13a contact fixed contact 12a, 12a, respectively.

復帰ばね１９は、たとえばコイルスプリング等であり、継鉄部１４の一面（図１における下面）と可動鉄芯１６との間に介装され可動鉄芯１６を継鉄部１４から離間する方向へ付勢するためのものである。 The return spring 19 is, for example, a coil spring or the like, and is interposed between one surface (the lower surface in FIG. 1) of the yoke portion 14 and the movable iron core 16 in a direction to separate the movable iron core 16 from the yoke portion 14. It is for energizing.

以上の部材が次のようにして取り付けられて図１に示す封止接点部１は構成されている。封止容器１１には、各接点挿通孔１１ｂから円筒部１２ｃを封止容器１１内に挿入した状態で固定端子１２が封止容器１１の他面部にロウ等の気密封止材５０により気密接合される。この封止容器１１内には、可動接触子１３が各固定接点１２ａに可動接点１３ａを対向させるとともに、シャフト挿通孔１３ｂにシャフト１５を挿通させた状態で収納される。そして、封止容器１１の開口１１ａを覆うように、継鉄部１４が挿通孔１４ａからシャフト１５の他端側を突出させた状態で、ロウ等の気密封止材５１により気密接合される。このとき、継鉄部１４の他面（図１における上面）と可動接触子１３との間に、シャフト１５に挿通された状態で接圧ばね１８を介装して接圧ばね１８により可動接触子１３をシャフト１５の規制部１５ａに弾接させる。また、この封止容器１１内には、接点１２ａ，１３ａ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、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。そして、継鉄部１４の一面側（図１における下面側）には、可動鉄芯１６を摺動自在に収納したキャップ部１７がフランジ部１７ｃでレーザー溶接等により気密接合されるのであるが、このとき、シャフト１５の他端部を可動鉄芯１６の小径孔部１６ｂに螺入して固定するとともに、継鉄部１４の一面と可動鉄芯１６との間に、復帰ばね１９を、可動鉄芯１６の大径穴部１６ａに一部収納するとともに、シャフト１５に挿通された状態で配置する。 The above-described members are attached as follows to constitute the sealed contact portion 1 shown in FIG. In the sealing container 11, the fixed terminal 12 is hermetically bonded to the other surface portion of the sealing container 11 by a hermetic sealing material 50 such as a wax in a state where the cylindrical part 12 c is inserted into the sealing container 11 from each contact insertion hole 11 b. Is done. The movable contact 13 is accommodated in the sealed container 11 with the movable contact 13a facing the fixed contact 12a and the shaft 15 inserted through the shaft insertion hole 13b. And the yoke part 14 is airtightly joined by the airtight sealing material 51, such as a wax, in the state which made the other end side of the shaft 15 protrude from the insertion hole 14a so that the opening 11a of the sealing container 11 may be covered. At this time, the contact pressure spring 18 is interposed between the other surface of the yoke portion 14 (upper surface in FIG. 1) and the movable contact 13 so as to be movable by the contact pressure spring 18. The child 13 is brought into elastic contact with the restricting portion 15 a of the shaft 15. Moreover, in this sealing container 11, gas is enclosed in order to extinguish the arc generated between the contacts 12a and 13a in a short time, and as such gas, the heat conduction is most excellent in the temperature region where the arc is generated. A mixed gas mainly composed of hydrogen gas is used. And, on one surface side (lower surface side in FIG. 1) of the yoke portion 14, a cap portion 17 in which the movable iron core 16 is slidably accommodated is airtightly joined by laser welding or the like at the flange portion 17c. At this time, the other end portion of the shaft 15 is screwed and fixed into the small-diameter hole portion 16b of the movable iron core 16, and the return spring 19 is movable between one surface of the yoke portion 14 and the movable iron core 16. A part of the iron core 16 is housed in the large-diameter hole portion 16 a and is inserted into the shaft 15.

このようにして構成された封止接点部１は、初期状態では、可動鉄芯１６がキャップ部１７の底部１７ｂに当接した状態で収納されて、継鉄部１４との間に所定距離（可動鉄芯１６の移動量の限界値）Ｓ２を有している。また、可動接触子１３は、シャフト１５の規制部１５ａにより可動接点１３ａが固定接点１２ａから所定距離（接点ギャップ）Ｓ１だけ離間した状態で収納されている。 In the initial state, the sealed contact portion 1 configured as described above is housed in a state where the movable iron core 16 is in contact with the bottom portion 17b of the cap portion 17, and a predetermined distance ( The limit value (S2) of the moving amount of the movable iron core 16 is provided. The movable contact 13 is accommodated in a state in which the movable contact 13a is separated from the fixed contact 12a by a predetermined distance (contact gap) S1 by the restricting portion 15a of the shaft 15.

次に、封止接点部１を駆動する電磁駆動部２について説明する。電磁駆動部２は、図４に示すように、継鉄ブロック２０と、コイルブロック２３とを備え、コイルブロック２３の図示しないコイルに電流を流して励磁することにより、可動鉄芯１６を継鉄部１４に吸引させ、これにより封止接点部１の駆動を行うものである。 Next, the electromagnetic drive part 2 which drives the sealing contact part 1 is demonstrated. As shown in FIG. 4, the electromagnetic drive unit 2 includes a yoke block 20 and a coil block 23, and a current is passed through a coil (not shown) of the coil block 23 to excite the movable iron core 16. The portion 14 is sucked, and thereby the sealing contact portion 1 is driven.

継鉄ブロック２０は、継鉄部１４及び可動鉄芯１６とともに磁気回路を構成するものであり、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、継鉄ブロック２０は、互いに並行配置された側板２１，２１と、両側板２１，２１の基端部を連結する連結板２２とを一体に備えている。各側板２１の先端部には、継鉄部１４の嵌合用突起１４ｂが嵌合される嵌合凹部２１ａがそれぞれ形成されるとともに、側端部（図３における下端部）には、継鉄ブロック２０をハウジング４に固定するための一対の固定用突起２１ｂ，２１ｂが一体に形成されている。連結板２２の略中央部には、キャップ部１７が挿通される挿通孔２２ａが形成され、この挿通孔２２ａの開口縁部には、側板２１の突出方向と同方向に円筒部２２ｂが一体に突設されている。 The yoke block 20 constitutes a magnetic circuit together with the yoke portion 14 and the movable iron core 16, and is formed in a substantially U shape from a magnetic metal material such as iron. More specifically, the yoke block 20 is integrally provided with side plates 21 and 21 arranged in parallel with each other and a connecting plate 22 that connects the base end portions of both side plates 21 and 21. A fitting recess 21a into which the fitting protrusion 14b of the yoke portion 14 is fitted is formed at the distal end portion of each side plate 21, and a yoke block is formed at the side end portion (lower end portion in FIG. 3). A pair of fixing protrusions 21b and 21b for fixing 20 to the housing 4 are integrally formed. An insertion hole 22a through which the cap portion 17 is inserted is formed in a substantially central portion of the connecting plate 22, and a cylindrical portion 22b is integrally formed in the opening edge portion of the insertion hole 22a in the same direction as the protruding direction of the side plate 21. Projected.

コイルブロック２３は、図示しないコイルと、該コイルが巻装されるコイルボビン２４とを備えて、継鉄ブロック２０の両側板２１，２１及び連結板２２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２４は、絶縁性材料から形成され、コイルが巻装される略円筒状の巻胴部２５と、巻胴部２５の軸方向一端側（継鉄部１４側）に形成される略円板状の鍔部２６と、巻胴部２５の軸方向他端側（継鉄ブロック２０側）に形成される略矩形状の鍔部２７とを一体に備えている。コイルボビン２４には、キャップ部１７が貫挿される断面円形状のキャップ部用孔部２４ａが軸方向に貫設されており、このキャップ部用孔部２４ａは、継鉄ブロック２０の円筒部２２ｂを挿入できるように鍔部２７側が拡径となっている。鍔部２７には、継鉄ブロック２０の連結板２２が嵌合される嵌合凹部２７ａが形成され、さらに、コイルが電気的、機械的に接続される端子部２７ｂが設けられている。また、端子部２７ｂは、図４に示すように、端子板２８に接続され、この端子板２８に設けられたコイル用端子２９，２９と電気的に接続される。コイル用端子２９は、たとえば銅系材料等の導電性材料から形成され、平板状の端子部２９ａと、端子部２９ａの長手方向一端部に突設され端子板２８に接続される略Ｌ字状の接続端子２９ｂと、端子部２９ａの短手方向両端側から突出する嵌入片２９ｃ，２９ｃとを一体に備えている。 The coil block 23 includes a coil (not shown) and a coil bobbin 24 around which the coil is wound, and is large enough to fit in a space surrounded by the side plates 21 and 21 and the connecting plate 22 of the yoke block 20. Is set. The coil bobbin 24 is made of an insulating material, and has a substantially cylindrical winding drum portion 25 around which the coil is wound, and a substantially circular plate formed on one end side (the yoke portion 14 side) in the axial direction of the winding drum portion 25. And a substantially rectangular flange portion 27 formed integrally on the other end side in the axial direction of the winding drum portion 25 (on the yoke block 20 side). The coil bobbin 24 is provided with a cap portion hole 24a having a circular cross section through which the cap portion 17 is inserted in the axial direction. The cap portion hole 24a is connected to the cylindrical portion 22b of the yoke block 20. The flange 27 side has an enlarged diameter so that it can be inserted. The flange portion 27 is formed with a fitting recess 27a into which the connecting plate 22 of the yoke block 20 is fitted, and further provided with a terminal portion 27b to which the coil is electrically and mechanically connected. Further, as shown in FIG. 4, the terminal portion 27 b is connected to a terminal plate 28 and is electrically connected to coil terminals 29 and 29 provided on the terminal plate 28. The coil terminal 29 is formed of a conductive material such as a copper-based material, for example, and has a flat terminal portion 29a and a substantially L-shape projecting from one end portion in the longitudinal direction of the terminal portion 29a and connected to the terminal plate 28. The connection terminal 29b and the fitting pieces 29c and 29c projecting from both ends in the short direction of the terminal portion 29a are integrally provided.

ところで、このコイルブロック２３では、コイルボビン２４の巻胴部２５に第１のコイル（図示せず）を巻装するとともに、巻胴部２５に第１のコイルを介して第２のコイル（図示せず）を巻装する、いわゆる２巻コイルを採用している。このような２巻コイルによれば、封止接点装置の接点オン時の大きな力が必要な際には起磁力の大きい方（或いは両方）を励磁して可動鉄芯１６にかける力を大きくし、接点オンとなった後には起磁力の小さい方（或いはいずれか一方）のみを励磁することによって（この切替には外部回路等を用いる）、接点オン状態を保持できる程度まで可動鉄芯１６にかける力を小さくするような動作が可能になる。したがって、このような２巻コイルを用いることで、接点オンとするのに必要な負荷が大きくても容易に対応することができ、しかも、接点オン後には、必要最低限な力で接点オン状態を保持することができるから、消費電力の低減を図り、封止接点装置を効率良く動作させることが可能になる。尚、両コイルの線径や巻数は同じであっても異なっていてもどちらでもよく、状況に応じて選択すればよい。またなお、この例では２巻コイルについて説明したが、単に１つのコイルを巻装してもよい。 By the way, in this coil block 23, while winding the 1st coil (not shown) around the winding drum part 25 of the coil bobbin 24, the 2nd coil (not shown) is interposed in the winding drum part 25 via the 1st coil. A so-called two-turn coil is employed. According to such a two-winding coil, when a large force is required when the contact of the sealed contact device is turned on, the one (or both) having a larger magnetomotive force is excited to increase the force applied to the movable iron core 16. After the contact is turned on, only one (or one) having a smaller magnetomotive force is excited (an external circuit or the like is used for this switching), so that the movable iron core 16 can be held to the extent that the contact on state can be maintained. Operation that reduces the applied force is possible. Therefore, by using such a two-turn coil, it is possible to easily cope with a large load required to turn on the contact, and after the contact is turned on, the contact is turned on with the minimum necessary force. Therefore, the power consumption can be reduced and the sealed contact device can be operated efficiently. Note that the wire diameter and the number of turns of both coils may be the same or different, and may be selected according to the situation. In addition, although the two-turn coil has been described in this example, only one coil may be wound.

カプセルヨーク３は、封止接点部１において固定接点１２ａから可動接点１３ａを引き離した際等に生じるアークを短時間で消去するためのものであり、磁性部材３０と、一対の永久磁石３１，３１とで構成されている。磁性部材３０は、鉄等の磁性金属材料から略コ字状に形成され、互いに対向する一対の側片３０ａ，３０ａと、両側片３０ａ，３０ａの基端部を連結する連結片３０ｂとを一体に備えている。永久磁石３１は、両側片３０ａにそれぞれ互いに対向するようにして取り付けられ、封止接点部１の封止容器１１に可動接点１３ａの固定接点１２ａへの接離方向に略直交する方向の磁場を与えるためのものである。 The capsule yoke 3 is for erasing an arc generated when the movable contact 13a is pulled away from the fixed contact 12a in the sealed contact portion 1 in a short time, and includes a magnetic member 30 and a pair of permanent magnets 31 and 31. It consists of and. The magnetic member 30 is formed in a substantially U shape from a magnetic metal material such as iron, and integrally includes a pair of side pieces 30a and 30a that face each other and a connecting piece 30b that connects the base ends of both side pieces 30a and 30a. In preparation. The permanent magnets 31 are attached to both side pieces 30a so as to face each other, and a magnetic field in a direction substantially orthogonal to the contact / separation direction of the movable contact 13a to the fixed contact 12a is applied to the sealing container 11 of the sealing contact portion 1. It is for giving.

ハウジング４は、たとえば絶縁性材料から形成され、封止接点部１及び電磁駆動部２が固定されるボディ４０と、ボディ４０に被着されるケース４１とを備えている。ボディ４０は、略平板状に形成されており、長手方向一端側に、封止接点部１の両固定端子１２の端子部１２ｂがそれぞれ貫挿される主端子用孔部４０ａが設けられるとともに、長手方向他端側に、電磁駆動部２のコイル用端子２９の端子部２９ａが貫挿されるコイル端子用孔部４０ｂが設けられている。また、ボディ４０の長手方向中央部の短手方向両端側には、継鉄ブロック２０の各一対の固定用突起２１ｂ，２１ｂがそれぞれ嵌入される固定用孔部４０ｃ，４０ｃが設けられている。さらに、ボディ４０の外周縁部には、全周に亘ってケース固定用の段部４０ｄが設けられている。ケース４１は、一面が開口した箱状に形成されており、開口縁部をボディ４０の段部４０ｄに当接させた状態で、ボディ４０に固定されるものである。 The housing 4 is formed of, for example, an insulating material, and includes a body 40 to which the sealed contact portion 1 and the electromagnetic drive unit 2 are fixed, and a case 41 attached to the body 40. The body 40 is formed in a substantially flat plate shape, and is provided with a main terminal hole 40a through which the terminal portions 12b of both the fixed terminals 12 of the sealing contact portion 1 are respectively inserted at one end side in the longitudinal direction. A coil terminal hole 40b into which the terminal portion 29a of the coil terminal 29 of the electromagnetic driving unit 2 is inserted is provided on the other end side in the direction. Further, fixing holes 40c and 40c into which the pair of fixing protrusions 21b and 21b of the yoke block 20 are respectively inserted are provided at both ends in the short direction of the center portion in the longitudinal direction of the body 40. Furthermore, a case fixing step 40d is provided on the outer peripheral edge of the body 40 over the entire periphery. The case 41 is formed in a box shape with one surface open, and is fixed to the body 40 in a state where the opening edge is in contact with the stepped portion 40d of the body 40.

以上述べた封止接点部１、電磁駆動部２、カプセルヨーク３、及びハウジング４により本実施形態の封止接点装置は構成されており、これらは次のようにしてハウジング４に収納されている。封止接点部１には、封止容器１１を覆うようにカプセルヨーク３が取り付けられるとともに、キャップ部１７をコイルボビン２４のキャップ部用孔部２４ａに挿入した状態でコイルブロック２３が取り付けられる。 The above-described sealed contact portion 1, electromagnetic driving portion 2, capsule yoke 3, and housing 4 constitute the sealed contact device of this embodiment, and these are accommodated in the housing 4 as follows. . A capsule yoke 3 is attached to the sealing contact portion 1 so as to cover the sealing container 11, and a coil block 23 is attached in a state where the cap portion 17 is inserted into the cap portion hole portion 24 a of the coil bobbin 24.

そして、このコイルブロック２３には、鍔部２７の嵌合凹部２７ａに継鉄ブロック２０の連結板２２を嵌合させるとともに、キャップ部用孔部２４ａに連結板２０の円筒部２２ｂを挿入した状態で、継鉄ブロック２０が取り付けられ、同時に、継鉄ブロック２０の両嵌合凹部２１ａが封止接点部１の継鉄部１４の嵌合用突起１４ｂに嵌合され、これにより、封止接点部１と電磁駆動部２とカプセルヨーク３とが連結される。 And in this coil block 23, while connecting the connecting plate 22 of the yoke block 20 to the fitting recessed part 27a of the collar part 27, the cylindrical part 22b of the connecting plate 20 was inserted in the hole part 24a for cap parts. Then, the yoke block 20 is attached, and at the same time, both fitting recesses 21a of the yoke block 20 are fitted into the fitting protrusions 14b of the yoke portion 14 of the sealed contact portion 1, and thereby the sealed contact portion 1, the electromagnetic drive part 2, and the capsule yoke 3 are connected.

このように連結された封止接点部１と電磁駆動部２とカプセルヨーク３とは、封止接点部１の固定端子１２，１２の端子部１２ｂ，１２ｂをボディ４０の主端子用孔部４０ａ，４０ａにそれぞれ貫挿させるとともに、電磁駆動部２のコイル用端子部２９，２９の端子部２９ａ，２９ａをボディ４０のコイル端子用孔部４０ｂ，４０ｂにそれぞれ貫挿させ、且つ、電磁駆動部２の各固定用突起２１ｂをボディ４０の固定用孔部４０ｃにそれぞれ嵌入した状態で、ボディ４０に固定配置される。このとき、固定端子１２の端子部１２ｂに設けた一対の嵌入片１２ｄ，１２ｄが主端子用孔部４０ａに嵌入されることで端子部１２ｂがボディ４０に固定され、同様に、コイル用端子２９の端子部２９ａに設けた一対の嵌入片２９ｃ，２９ｃがコイル端子用孔部４０ｂに嵌入されることで端子部２９ａがボディ４０に固定される。 The sealed contact portion 1, the electromagnetic driving portion 2, and the capsule yoke 3 connected in this way are connected to the terminal portions 12 b and 12 b of the fixed terminals 12 and 12 of the sealed contact portion 1 and the main terminal hole 40 a of the body 40. 40a, the terminal portions 29a, 29a of the coil terminal portions 29, 29 of the electromagnetic drive unit 2 are respectively inserted into the coil terminal hole portions 40b, 40b of the body 40, and the electromagnetic drive portion. The two fixing protrusions 21 b are fixedly arranged on the body 40 in a state in which the fixing protrusions 21 b are respectively fitted in the fixing holes 40 c of the body 40. At this time, the pair of fitting pieces 12d and 12d provided in the terminal portion 12b of the fixed terminal 12 are fitted into the main terminal hole 40a, whereby the terminal portion 12b is fixed to the body 40. Similarly, the coil terminal 29 The terminal portion 29a is fixed to the body 40 by fitting a pair of fitting pieces 29c, 29c provided in the terminal portion 29a into the coil terminal hole 40b.

そして、封止接点部１と電磁駆動部２とカプセルヨーク３とが固定されたボディ４０に、ケース４１が、開口縁部をボディ４０の段部４０ｄに当接させた状態で被着、固定されることでハウジング４が構成され、これにより、封止接点装置が完成する。 The case 41 is attached and fixed to the body 40 to which the sealed contact portion 1, the electromagnetic drive portion 2, and the capsule yoke 3 are fixed in a state where the opening edge is in contact with the stepped portion 40 d of the body 40. As a result, the housing 4 is configured, and thereby the sealed contact device is completed.

次に、本実施形態の封止接点装置の動作について説明する。本実施形態の封止接点装置は、上述したように常開型のものであり、初期状態では図１に示すように、接圧ばね１８により固定接点１２ａ側へ付勢されている可動接触子１３の移動をシャフト１５の規制部１５ａによって規制して、固定接点１２ａと可動接点１３ａとが離間した状態となっている。そして、電磁駆動部２のコイルが励磁されると、可動鉄芯１６が継鉄部１４に吸引されて、復帰ばね１９の付勢に逆らって可動鉄芯１６がシャフト１５とともに継鉄部１４に近接する方向（図１における上方向）へ移動していく。これに伴なって、シャフト１５の規制部１５ａによる可動接触子１３の固定接点１２ａ側への移動規制が解除されていき、やがて、接圧ばね１８の付勢によって可動接触子１３は可動接点１３ａ，１３ａがそれぞれ対応する固定接点１２ａ，１２ａに当接する位置まで移動させられて、接点オンとなる。この状態からさらに可動鉄芯１６が継鉄部１４側へ移動する、いわゆるオーバートラベル時には、既に可動接触子１３の可動接点１３ａが固定接点１２ａに当接していることにより接圧ばね１８の負荷がなくなっており、単に復帰ばね１９のみが撓められていくことになる。そして、電磁駆動部２のコイルの励磁が切られると、可動鉄芯１６は、復帰ばね１９の付勢力によって、継鉄部１４から離間する方向（図１における下方向）へ移動していく。これに伴なってシャフト１５の規制部１５ａが可動接触子１３を接圧ばね１８の付勢力に逆らう方向へ移動させて、可動接点１３ａを固定接点１２ａから引き離し、初期状態へと復帰する。 Next, the operation of the sealed contact device of this embodiment will be described. As described above, the sealed contact device of the present embodiment is of a normally open type, and in the initial state, as shown in FIG. 1, the movable contact that is biased toward the fixed contact 12 a by the contact pressure spring 18. The movement of 13 is regulated by the regulating portion 15a of the shaft 15, and the fixed contact 12a and the movable contact 13a are separated from each other. When the coil of the electromagnetic drive unit 2 is excited, the movable iron core 16 is attracted to the yoke portion 14, and the movable iron core 16 is moved together with the shaft 15 to the yoke portion 14 against the bias of the return spring 19. It moves in the approaching direction (upward direction in FIG. 1). Accordingly, the movement restriction of the movable contact 13 toward the fixed contact 12a by the restriction portion 15a of the shaft 15 is released, and the movable contact 13 is eventually moved by the biasing of the contact pressure spring 18. , 13a are moved to positions where they contact the corresponding fixed contacts 12a, 12a, respectively, and the contacts are turned on. At the time of so-called overtravel in which the movable iron core 16 further moves to the yoke portion 14 side from this state, the load of the contact pressure spring 18 is increased because the movable contact 13a of the movable contact 13 is already in contact with the fixed contact 12a. Only the return spring 19 is bent. And when the excitation of the coil of the electromagnetic drive part 2 is cut | disconnected, the movable iron core 16 will move to the direction (downward direction in FIG. 1) which leaves | separates from the yoke part 14 with the urging | biasing force of the return spring 19. FIG. Along with this, the restricting portion 15a of the shaft 15 moves the movable contact 13 in a direction against the urging force of the contact pressure spring 18, pulls the movable contact 13a away from the fixed contact 12a, and returns to the initial state.

ここで、可動接点１３ａが固定接点１２ａから引き離された際には、上述したように接点１２ａ，１３ａ間にアークが発生することになるが、このアークはカプセルヨーク３の磁場によって可動接触子１３の移動方向に直交する方向へ十分に引き伸ばされるとともに、封止容器１１内に封入されたガスによって冷却され、これによりアーク電圧が急激に上昇し、このアーク電圧が接点間の電圧を上回った時点でアークが遮断される。つまり、本実施形態の封止接点装置では、カプセルヨーク３による磁気ブローと、封止容器１１内に封入したガスによる冷却とで、アーク対策が講じられており、これによりアークを短時間で遮断することができるようになり、接点１２ａ，１３ａの消耗が小さくなるようにしている。 Here, when the movable contact 13 a is separated from the fixed contact 12 a, an arc is generated between the contacts 12 a and 13 a as described above. This arc is generated by the magnetic field of the capsule yoke 3 and the movable contact 13. Is sufficiently stretched in the direction perpendicular to the moving direction of the gas and cooled by the gas sealed in the sealing container 11, whereby the arc voltage rapidly rises and this arc voltage exceeds the voltage between the contacts. The arc is cut off. That is, in the sealed contact device of the present embodiment, arc countermeasures are taken by magnetic blow by the capsule yoke 3 and cooling by the gas sealed in the sealed container 11, thereby interrupting the arc in a short time. This makes it possible to reduce the consumption of the contacts 12a and 13a.

以上述べたような接点のオン・オフ動作時に、可動鉄芯１６の移動量（ストローク）Ｓに対して可動鉄芯１６にかかる負荷Ｆは、図２にようになる。尚、図中Ｋ１は復帰ばね１９の負荷を示し、Ｋ２は接圧ばね１８の負荷を示し、Ｋ３は各ばね１８，１９の合成負荷（すなわち、可動鉄芯１６を移動量Ｓだけ移動させるのに必要な力）を示している。また、Ｓ０は可動鉄芯１６の移動量が０の初期状態であり、Ｓ１は両接点１２ａ，１３ａ間の接点ギャップであり、Ｓ２は可動鉄芯１６の移動量の限界値である。 The load F applied to the movable iron core 16 with respect to the movement amount (stroke) S of the movable iron core 16 during the contact ON / OFF operation as described above is as shown in FIG. In the figure, K1 indicates the load of the return spring 19, K2 indicates the load of the contact pressure spring 18, and K3 indicates the combined load of the springs 18 and 19 (that is, the movable iron core 16 is moved by the moving amount S). Required force). S0 is an initial state in which the moving amount of the movable iron core 16 is zero, S1 is a contact gap between the two contacts 12a and 13a, and S2 is a limit value of the moving amount of the movable iron core 16.

つまり、本実施形態の封止接点装置によれば、接圧ばね１８を継鉄部１４の他面と可動接触子１３との間に介装して、可動接触子１３を固定接点１２ａ側へ付勢して可動接点１３ａを固定接点１２ａに接触させるようにするとともに、復帰ばね１９を継鉄部１４の一面と可動鉄芯１６との間に介装して、可動鉄芯１６を継鉄部１４から離間する方向へ付勢するようにして、接圧ばね１８と復帰ばね１９との付勢方向が互いに逆向きとなるようにしているので、接点オンとなるまでは、可動鉄芯１６の移動方向に対して反対方向の復帰ばね１９の負荷Ｋ１と、可動鉄芯１６の移動方向に対して順方向の接圧ばね１８の負荷Ｋ２との差分が合成負荷Ｋ３として可動鉄芯１６にかかり、接点オンとなった後は、復帰ばね１９の負荷Ｋ１のみが可動鉄芯１６にかかることになる。 That is, according to the sealed contact device of the present embodiment, the contact pressure spring 18 is interposed between the other surface of the yoke portion 14 and the movable contact 13, and the movable contact 13 is moved to the fixed contact 12a side. The movable contact 13a is brought into contact with the fixed contact 12a by energizing, and a return spring 19 is interposed between one surface of the yoke portion 14 and the movable iron core 16 so that the movable iron core 16 is relayed. Since the urging directions of the contact pressure spring 18 and the return spring 19 are opposite to each other so as to be urged away from the portion 14, the movable iron core 16 is turned on until the contact is turned on. The difference between the load K1 of the return spring 19 in the opposite direction to the moving direction and the load K2 of the contact pressure spring 18 in the forward direction with respect to the moving direction of the movable iron core 16 is a composite load K3. After the contact is turned on, only the load K1 of the return spring 19 is movable iron. It will be applied to the 16.

そのため、オーバートラベル時（Ｓ１〜Ｓ２間）において、可動鉄芯１６は、復帰ばね１９の負荷（付勢力）のみを受けるので、合成負荷Ｋ３の傾きが復帰ばね１９のばね定数となり、これにより、図１１に示す従来例のようにオーバートラベル時の合成負荷Ｋ３の傾きが接圧ばねと復帰ばねのばね定数の和となるものに比べて、移動量Ｓに対する合成負荷Ｋ３の変化を極めて小さくすることができる。したがって、たとえば、組立誤差や、使用による接点消耗等によって、一方の接点ギャップＳ１が他方の接点ギャップＳ１よりも大きくなった場合でも、一方の接点を閉じるのに必要な負荷Ｆ１があまり増減せず、そのため、装置毎に接点オンとなる負荷Ｆ１が大きい振れ幅でばらつくことがなくなり、これにより封止接点装置の性能のばらつきを低減することができる。 Therefore, during the overtravel (between S1 and S2), the movable iron core 16 receives only the load (biasing force) of the return spring 19, so that the slope of the combined load K3 becomes the spring constant of the return spring 19, thereby As compared with the conventional example shown in FIG. 11, the change in the combined load K3 with respect to the movement amount S is extremely small as compared with the case where the inclination of the combined load K3 during overtravel is the sum of the spring constants of the contact pressure spring and the return spring. be able to. Therefore, for example, even when one contact gap S1 becomes larger than the other contact gap S1 due to assembly errors or contact wear due to use, the load F1 required to close one contact does not increase or decrease so much. For this reason, the load F1 that turns on the contact for each device does not vary with a large fluctuation width, thereby reducing the variation in performance of the sealed contact device.

しかも、本実施形態の封止接点装置では、図１１に示す従来例の封止接点装置とは異なり、接圧ばね及び可動接触子を収納する可動接触子ホルダーＨが必要なくなるため、低コスト化を図ることができるようになり、これにより、変動費を抑えることができるようになるという利点もある。 In addition, the sealed contact device of the present embodiment, unlike the sealed contact device of the conventional example shown in FIG. 11, eliminates the need for the movable contact holder H that houses the contact pressure spring and the movable contact, thereby reducing the cost. There is also an advantage that the variable cost can be suppressed.

（実施形態２）
ところで、上記実施形態１の封止接点装置では、復帰ばね１９を継鉄部１４の一面側と可動鉄芯１６との間に介在させているだけなので、動作時に、復帰ばね１９が継鉄部１４上を摺動し、位置ずれ等が生じるおそれがあった。 (Embodiment 2)
By the way, in the sealed contact device of the first embodiment, since the return spring 19 is merely interposed between the one surface side of the yoke portion 14 and the movable iron core 16, the return spring 19 is operated during the operation. 14 may slide and cause a positional shift or the like.

そこで、本実施形態の封止接点装置は、この問題を解決する手段として、図５（ａ），（ｂ）に示すように、継鉄部１４の一面側に、復帰ばね用固定部となる凹部６０を一体に形成していることに特徴があり、その他の構成は上記実施形態１と略同様であるので、同様の構成については同一の符号を付して説明を省略する。 Therefore, as a means for solving this problem, the sealed contact device of the present embodiment serves as a return spring fixing portion on one surface side of the yoke portion 14 as shown in FIGS. 5 (a) and 5 (b). Since the concave portion 60 is formed integrally, and other configurations are substantially the same as those of the first embodiment, the same configurations are denoted by the same reference numerals and description thereof is omitted.

この凹部６０は、図６（ａ），（ｂ）に示すように、復帰ばね１９の外径と略同程度の内径を有する略円形状のものであり、復帰ばね１９の端部が嵌入されることで、復帰ばね１９の摺動を抑制することができるようになっている。尚、このような凹部６０の中央部には上記のシャフト１５が挿通されるシャフト挿通孔１４ａが形成されているが、図６，７においては省略してある。 As shown in FIGS. 6A and 6B, the recess 60 has a substantially circular shape having an inner diameter substantially equal to the outer diameter of the return spring 19, and the end of the return spring 19 is fitted into the recess 60. Thus, sliding of the return spring 19 can be suppressed. A shaft insertion hole 14a through which the shaft 15 is inserted is formed at the center of the recess 60, but is omitted in FIGS.

以上述べた本実施形態の封止接点装置によれば、復帰ばね用固定部により復帰ばね１９を固定しているので、復帰ばね１９が継鉄部１４上を摺動することによる復帰ばね１９の位置ずれを抑制でき、これにより、復帰ばね１９の一部が継鉄部１４のシャフト１５用の挿通孔１４ａ内に入り込んでシャフト１５の移動を妨げるようなかじ込み等に起因する封止接点装置の動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、復帰ばね用固定部を継鉄部１４に一体に形成しているので、封止接点装置の部品点数を増加しなくて済み、これにより製造コストの増加を抑えることができる。 According to the sealed contact device of the present embodiment described above, since the return spring 19 is fixed by the return spring fixing portion, the return spring 19 is moved by sliding the return spring 19 on the yoke portion 14. The position shift can be suppressed, and thereby, a part of the return spring 19 enters into the insertion hole 14a for the shaft 15 of the yoke portion 14 to prevent the movement of the shaft 15, and the sealed contact device due to the biting. It is possible to obtain a stable operation while avoiding adverse effects on the operation. In addition, since the return spring fixing portion is formed integrally with the yoke portion 14, it is not necessary to increase the number of parts of the sealed contact device, thereby suppressing an increase in manufacturing cost.

ここで、上述したような復帰ばね用固定部は、図６（ａ），（ｂ）に示す凹部６０に限られるものではない。たとえば、図６（ｃ），（ｄ）に示すように、凹部６０の底部に、復帰ばね１９の内径と同程度の外径を有する略円筒状の突部６１を凹部６２と同心円となるように突設する構成とすることができる。この場合、凹部６０の内周面と突部６１の外周面との間に復帰ばね１９の端部を嵌入することで、復帰ばね１９を強固に固定することができる。また、略円筒状の突部６１ではなく、図６（ｅ），（ｆ）に示すように、復帰ばね１９の内径と同程度の外径を有する略円柱状の突部６２を同様に突設してもよい。 Here, the return spring fixing portion as described above is not limited to the concave portion 60 shown in FIGS. For example, as shown in FIGS. 6 (c) and 6 (d), a substantially cylindrical protrusion 61 having an outer diameter comparable to the inner diameter of the return spring 19 is formed concentrically with the recess 62 at the bottom of the recess 60. It can be set as the structure protrudingly provided. In this case, the return spring 19 can be firmly fixed by inserting the end of the return spring 19 between the inner peripheral surface of the recess 60 and the outer peripheral surface of the protrusion 61. Further, instead of the substantially cylindrical protrusion 61, as shown in FIGS. 6E and 6F, a substantially columnar protrusion 62 having an outer diameter similar to the inner diameter of the return spring 19 is similarly projected. You may set up.

一方、図６（ｇ），（ｈ）に示すように、復帰ばね１９の内径と略同程度の外径を有する略円筒状の突部６３を突設する構成とすることができる。この場合、突部６３を復帰ばね１９に嵌入することで、復帰ばね１９を固定することができる。また、略円筒状の突部６３ではなく、図６（ｉ），（ｊ）に示すように、復帰ばね１９の内径と同程度の外径を有する略円柱状の突部６４を同様に突設してもよい。 On the other hand, as shown in FIGS. 6G and 6H, a substantially cylindrical protrusion 63 having an outer diameter substantially the same as the inner diameter of the return spring 19 can be provided. In this case, the return spring 19 can be fixed by fitting the protrusion 63 into the return spring 19. Further, instead of the substantially cylindrical protrusion 63, as shown in FIGS. 6I and 6J, a substantially columnar protrusion 64 having an outer diameter similar to the inner diameter of the return spring 19 is similarly projected. You may set up.

或いは、図７（ａ），（ｂ）に示すように、復帰ばね１９の外径と同程度の内径を有する略円筒状の突部６５を突設する構成とすることができる。この場合、復帰ばね１９の端部を突部６５内に嵌入することで、復帰ばね１９を固定することができる。加えて、この構成に、図７（ｃ），（ｄ）に示すように、復帰ばね１９の内径と同程度の外径を有する略円柱状の突部６６を突部６５と同心円となるように突設するようにしてもよい。この場合、突部６５の内周面と突部６６の外周面との間に復帰ばね１９の端部を嵌入することで、復帰ばね１９を強固に固定することができるようになる。 Alternatively, as shown in FIGS. 7A and 7B, a substantially cylindrical protrusion 65 having an inner diameter comparable to the outer diameter of the return spring 19 can be provided. In this case, the return spring 19 can be fixed by fitting the end of the return spring 19 into the protrusion 65. In addition, in this configuration, as shown in FIGS. 7C and 7D, a substantially columnar protrusion 66 having an outer diameter comparable to the inner diameter of the return spring 19 is concentric with the protrusion 65. You may make it project to. In this case, the return spring 19 can be firmly fixed by inserting the end of the return spring 19 between the inner peripheral surface of the protrusion 65 and the outer peripheral surface of the protrusion 66.

また、図７（ｅ），（ｆ）に示すように、復帰ばね１９の内径と同程度の外径を有する略円柱状の突部６７を突設し、この突部６７の外周面をテーパ状に形成して、突出するにつれて狭径となるようにしてもよい。この場合、突部６７を復帰ばね１９に挿入することで、復帰ばね１９を固定することができる。 Further, as shown in FIGS. 7E and 7F, a substantially cylindrical protrusion 67 having an outer diameter comparable to the inner diameter of the return spring 19 is provided, and the outer peripheral surface of the protrusion 67 is tapered. It may be formed in a shape and become narrower as it protrudes. In this case, the return spring 19 can be fixed by inserting the protrusion 67 into the return spring 19.

逆に、図７（ｇ），（ｈ）に示すように、復帰ばね１９の外径と同程度の内径を有する略円形状の凹部６８を凹設し、この凹部６８の内周面をテーパ状に形成して、開口側へいくにつれて拡径となるようにしてもよい。この場合、復帰ばね１９の端部を凹部６８に挿入することで、復帰ばね１９を固定することができる。 On the other hand, as shown in FIGS. 7G and 7H, a substantially circular recess 68 having an inner diameter approximately equal to the outer diameter of the return spring 19 is provided, and the inner peripheral surface of the recess 68 is tapered. It may be formed in a shape, and the diameter may be increased toward the opening side. In this case, the return spring 19 can be fixed by inserting the end of the return spring 19 into the recess 68.

さらに、図７（ｉ），（ｊ）に示すように、上記の凹部６８に上記の突部６７を同心円となるように形成するようにしてもよい。この場合、凹部６８の内周面と突部６７の外周面との間に復帰ばね１９の端部を挿入することで、復帰ばね１９を固定することができるようになる。 Further, as shown in FIGS. 7 (i) and 7 (j), the protrusion 67 may be formed concentrically in the recess 68. In this case, the return spring 19 can be fixed by inserting the end of the return spring 19 between the inner peripheral surface of the recess 68 and the outer peripheral surface of the protrusion 67.

（実施形態３）
上記実施形態２は、復帰ばね１９の固定に関するものであったが、本実施形態は、接圧ばね１８の固定に関するものである。 (Embodiment 3)
The second embodiment relates to the fixing of the return spring 19, but the present embodiment relates to the fixing of the contact pressure spring 18.

つまり、上記実施形態１の封止接点装置では、接圧ばね１８は継鉄部１４の他面側と可動接触子１３との間に介在されているだけであるから、復帰ばね１９同様、動作時に継鉄部１４上を摺動して位置ずれする等の問題が生じるおそれがある。 That is, in the sealed contact device of the first embodiment, the contact pressure spring 18 is merely interposed between the other surface side of the yoke portion 14 and the movable contact 13, and thus operates similarly to the return spring 19. There is a possibility that problems such as sliding on the yoke part 14 and displacement may sometimes occur.

そこで、本実施形態の封止接点装置では、この問題を解決する手段として、図８（ａ），（ｂ）に示すように、継鉄部１４の他面側に、接圧ばね用固定部となる凹部７０を一体に形成している。尚、その他の構成は上記実施形態１と略同様であるので、同様の構成については同一の符号を付して説明を省略する。 Therefore, in the sealed contact device of the present embodiment, as a means for solving this problem, as shown in FIGS. 8A and 8B, the fixing portion for the contact pressure spring is provided on the other surface side of the yoke portion 14. The concave portion 70 is formed integrally. In addition, since the other structure is substantially the same as the said Embodiment 1, the same code | symbol is attached | subjected about the same structure and description is abbreviate | omitted.

この凹部７０は、図８（ｂ）に示すように、接圧ばね１８の外径と略同程度の内径を有する略円形状のものであり、接圧ばね１８の端部が嵌入されることで、接圧ばね１８の摺動を抑制することができるようになっている。 As shown in FIG. 8B, the concave portion 70 has a substantially circular shape having an inner diameter substantially equal to the outer diameter of the contact pressure spring 18, and the end of the contact pressure spring 18 is fitted therein. Thus, the sliding of the contact pressure spring 18 can be suppressed.

以上述べた本実施形態の封止接点装置によれば、接圧ばね用固定部により接圧ばね１８を固定しているので、接圧ばね１８が継鉄部１４上を摺動することによる接圧ばね１８の位置ずれを抑制でき、これにより、接圧ばね１８の一部が継鉄部１４のシャフト１５用の挿通孔１４ａ内に入り込んでシャフト１５の移動が妨げられるようなかじ込み等に起因する封止接点装置の動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、接圧ばね用固定部を継鉄部１４に一体に形成しているので、封止接点装置の部品点数を増加しなくて済み、これにより製造コストの増加を抑えることができる。 According to the sealed contact device of the present embodiment described above, the contact pressure spring 18 is fixed by the contact pressure spring fixing portion, so that the contact pressure spring 18 slides on the yoke portion 14 for contact. The displacement of the pressure spring 18 can be suppressed, and thereby, a part of the contact pressure spring 18 enters into the insertion hole 14a for the shaft 15 of the yoke portion 14 and the shaft 15 is prevented from moving and the like. It is possible to avoid a bad influence on the operation of the sealed contact device due to this and obtain a stable operation. In addition, since the contact pressure spring fixing portion is formed integrally with the yoke portion 14, it is not necessary to increase the number of parts of the sealed contact device, thereby suppressing an increase in manufacturing cost.

また、上述したような接圧ばね用固定部は、図８に示す凹部７０に限られるものではなく、たとえば上記実施形態２で述べた図６〜図７に示すものを復帰ばねから接圧ばねに対応する寸法に変更して使用することもでき、さらに状況に応じて様々な形状にしてもよい。 Further, the contact pressure spring fixing portion as described above is not limited to the concave portion 70 shown in FIG. 8, and for example, the contact spring shown in FIGS. 6 to 7 described in the second embodiment is changed from the return spring to the contact pressure spring. It is also possible to change the dimensions to correspond to the above and use them in various shapes depending on the situation.

（実施形態４）
ところで、上記実施形態２の復帰ばね用固定部と、上記実施形態３の接圧ばね用固定部とを継鉄部１４にそれぞれ設ければ、接圧ばね１８と復帰ばね１９の両方を固定することができ、いずれか一方のみを設けた場合に比べて、さらに動作の安定性を向上させることが可能である。 (Embodiment 4)
By the way, if the fixing portion for the return spring of the second embodiment and the fixing portion for the contact pressure spring of the third embodiment are respectively provided in the yoke portion 14, both the contact pressure spring 18 and the return spring 19 are fixed. Therefore, it is possible to further improve the stability of the operation as compared with the case where only one of them is provided.

しかしながら、この場合、継鉄部１４の両面にそれぞれ固定部用の加工をしなければならないため、作業性が悪いという問題が生じる。 However, in this case, since both sides of the yoke portion 14 must be processed for the fixing portion, there is a problem that workability is poor.

そこで、本実施形態では、かかる問題を解決するために、図９（ａ），（ｂ）に示すように、継鉄部１４の一部を一面側から他面側へ押圧加工して、一面側に凹部８０ａ、他面側に突部８０ｂを有するばね固定部８０を形成するようにしている。ここで、凹部８０ａは、復帰ばね１９の外径と同程度の内径を有する略円形状のものであり、突部８０ｂは、接圧ばね１８の内径と同程度の外径を有する略円柱状のものである。尚、その他の構成は上記実施形態１と略同様であるので、同様の構成については同一の符号を付して説明を省略する。 Therefore, in the present embodiment, in order to solve such a problem, as shown in FIGS. 9A and 9B, a part of the yoke portion 14 is pressed from one surface side to the other surface side, A spring fixing portion 80 having a concave portion 80a on the side and a protrusion 80b on the other side is formed. Here, the concave portion 80 a has a substantially circular shape having an inner diameter comparable to the outer diameter of the return spring 19, and the protrusion 80 b has a substantially cylindrical shape having an outer diameter comparable to the inner diameter of the contact pressure spring 18. belongs to. In addition, since the other structure is substantially the same as the said Embodiment 1, the same code | symbol is attached | subjected about the same structure and description is abbreviate | omitted.

つまり、このばね固定部８０は、凹部８０ａで復帰ばね１９を固定するとともに、突部８０ｂで接圧ばね１８を固定して、これにより、両ばね１８，１９を同時に固定することができるようになっている。 In other words, the spring fixing portion 80 fixes the return spring 19 at the concave portion 80a, and fixes the contact pressure spring 18 at the protrusion 80b, so that both springs 18 and 19 can be fixed simultaneously. It has become.

したがって、本実施形態の封止接点装置によれば、ばね固定部８０により復帰ばね１９と接圧ばね１８の両方を一括して固定しているので、両ばね１８，１９が継鉄部１４上を摺動することによる両ばね１８，１９の位置ずれを抑制でき、これにより、両ばね１８，１９のかじ込み等の動作への悪影響を回避して、安定した動作を得ることができるようになり、しかも、継鉄部１４に一体に形成しているので、部品点数を増加しなくて済む。さらに、１つのばね固定部によって両方のばね１８，１９をそれぞれ固定できるので、継鉄部１４の両面側にそれぞれのばね用固定部を設ける場合に比べて加工回数が１回で済むから、作業性を向上することができる。 Therefore, according to the sealed contact device of the present embodiment, since both the return spring 19 and the contact pressure spring 18 are fixed together by the spring fixing portion 80, both springs 18, 19 are on the yoke portion 14. The displacement of both springs 18 and 19 due to sliding can be suppressed, thereby avoiding adverse effects on the operation such as the biting of both springs 18 and 19 so that a stable operation can be obtained. In addition, since it is formed integrally with the yoke portion 14, it is not necessary to increase the number of parts. Furthermore, since both springs 18 and 19 can be fixed by one spring fixing portion, the number of machining operations can be reduced to one as compared with the case where each spring fixing portion is provided on both sides of the yoke portion 14. Can be improved.

また、このばね固定部８０は、上記の図９に示すものに限られるものではなく、継鉄部１４の一部を他面側から一面側へ押圧加工して、一面側に復帰ばね１９固定用の突部、他面側に接圧ばね固定用の凹部を有するようにしてもよい。 Further, the spring fixing portion 80 is not limited to the one shown in FIG. 9 described above, and a part of the yoke portion 14 is pressed from the other surface side to the one surface side, and the return spring 19 is fixed to the one surface side. And a concave portion for fixing the contact pressure spring on the other surface side.

（実施形態５）
一方、上記実施形態３，４では、継鉄部１４に接圧ばね１８を固定するようにしていたが、接圧ばね１８は、上述したように継鉄部１４の他面側と可動接触子１３との間に介在されるものであるから、本実施形態の封止接点装置では、図１０（ａ），（ｂ）に示すように、可動接触子１３の継鉄部１４と対向する面側に、接圧ばね１８を固定する固定部となる凹部９０を一体に形成している。 (Embodiment 5)
On the other hand, in the third and fourth embodiments, the contact pressure spring 18 is fixed to the yoke portion 14, but the contact pressure spring 18 is connected to the other surface side of the yoke portion 14 and the movable contact as described above. 13, in the sealed contact device of the present embodiment, as shown in FIGS. 10A and 10B, the surface facing the yoke portion 14 of the movable contact 13. On the side, a concave portion 90 is integrally formed as a fixing portion for fixing the contact pressure spring 18.

この凹部９０は、図１０（ｂ）に示すように、接圧ばね１８の外径と略同程度の内径を有する略円形状のものであり、接圧ばね１８の端部が嵌入されることで、接圧ばね１８の摺動を抑制することができるようになっている。尚、本実施形態の封止接点装置のその他の構成は上記実施形態１と略同様であるので、同様の構成については同一の符号を付して説明を省略する。 As shown in FIG. 10B, the concave portion 90 has a substantially circular shape having an inner diameter substantially equal to the outer diameter of the contact pressure spring 18, and the end of the contact pressure spring 18 is fitted therein. Thus, the sliding of the contact pressure spring 18 can be suppressed. In addition, since the other structure of the sealing contact apparatus of this embodiment is as substantially the same as the said Embodiment 1, the same code | symbol is attached | subjected about the same structure and description is abbreviate | omitted.

以上述べた本実施形態の封止接点装置によれば、可動接触子１３に設けた固定部により接圧ばね１８を固定しているので、接圧ばね１８が可動接触子１３上を摺動することによる接圧ばね１８の位置ずれを抑制でき、これにより、接圧ばね１８の一部が可動接触子１３のシャフト挿通孔１３ｂに入り込んでシャフト１５の移動が妨げられるようなかじ込み等に起因する封止接点装置の動作への悪影響を回避して、安定した動作を得ることができるようになる。しかも、固定部を可動接触子１３に一体に形成しているので、封止接点装置の部品点数を増加しなくて済み、これにより製造コストの増加を抑えることができる。 According to the sealed contact device of the present embodiment described above, the contact pressure spring 18 is fixed by the fixed portion provided on the movable contact 13, and therefore the contact pressure spring 18 slides on the movable contact 13. The displacement of the contact pressure spring 18 due to this can be suppressed, and this causes a part of the contact pressure spring 18 to enter the shaft insertion hole 13b of the movable contact 13 to cause the shaft 15 to be prevented from moving. Thus, it is possible to avoid an adverse effect on the operation of the sealed contact device and to obtain a stable operation. In addition, since the fixed portion is integrally formed with the movable contact 13, it is not necessary to increase the number of parts of the sealed contact device, thereby suppressing an increase in manufacturing cost.

また、本実施形態の固定部は、図１０に示す凹部９０に限られるものではなく、たとえば上記実施形態２で述べた図６〜図７に示すものを復帰ばねから接圧ばねに対応する寸法に変更して使用することもでき、さらに状況に応じて様々な形状にしてもよい。 Further, the fixing portion of the present embodiment is not limited to the concave portion 90 shown in FIG. 10. For example, the dimensions shown in FIGS. 6 to 7 described in the second embodiment are the dimensions corresponding to the return spring to the contact pressure spring. It can also be used by changing to the above, and various shapes may be used depending on the situation.

勿論、本実施形態の可動接触子１３に接圧ばね１８の固定部を設ける構成は、上記実施形態２〜４に採用することができ、これにより、さらなる動作の安定性を図ることができる。 Of course, the structure which provides the fixed part of the contact pressure spring 18 in the movable contact 13 of this embodiment can be employ | adopted for the said Embodiments 2-4, Thereby, the stability of the further operation | movement can be aimed at.

本発明の実施形態１の封止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 sealing contact apparatus of Embodiment 1 of this invention. 同上の封止接点装置の動作説明図である。It is operation | movement explanatory drawing of a sealing contact apparatus same as the above. 同上の封止接点装置の分解斜視図である。It is a disassembled perspective view of the sealing contact device same as the above. 同上の封止接点装置の部分断面図である。It is a fragmentary sectional view of a sealing contact device same as the above. （ａ）は、本発明の実施形態２の封止接点装置の要部の概略断面図であり、（ｂ）は、同図（ａ）にＡで示す部位の拡大図である。(A) is a schematic sectional drawing of the principal part of the sealing contact apparatus of Embodiment 2 of this invention, (b) is an enlarged view of the site | part shown by A in the figure (a). （ａ）は、ばね固定部の一例の説明図であり、（ｂ）は、同図（ａ）の断面図であり、（ｃ）は、ばね固定部の一例の説明図であり、（ｄ）は、同図（ｃ）の断面図であり、（ｅ）は、ばね固定部の一例の説明図であり、（ｆ）は、同図（ｅ）の断面図であり、（ｇ）は、ばね固定部の一例の説明図であり、（ｈ）は、同図（ｇ）の断面図であり、（ｉ）は、ばね固定部の一例の説明図であり、（ｊ）は、同図（ｉ）の断面図である。(A) is explanatory drawing of an example of a spring fixing | fixed part, (b) is sectional drawing of the figure (a), (c) is explanatory drawing of an example of a spring fixing | fixed part, (d ) Is a cross-sectional view of the same figure (c), (e) is an explanatory view of an example of a spring fixing part, (f) is a cross-sectional view of the same figure (e), (g) FIG. 4 is an explanatory view of an example of a spring fixing portion, (h) is a sectional view of FIG. (G), (i) is an explanatory view of an example of a spring fixing portion, and (j) is the same as FIG. It is sectional drawing of figure (i). （ａ）は、ばね固定部の一例の説明図であり、（ｂ）は、同図（ａ）の断面図であり、（ｃ）は、ばね固定部の一例の説明図であり、（ｄ）は、同図（ｃ）の断面図であり、（ｅ）は、ばね固定部の一例の説明図であり、（ｆ）は、同図（ｅ）の断面図であり、（ｇ）は、ばね固定部の一例の説明図であり、（ｈ）は、同図（ｇ）の断面図であり、（ｉ）は、ばね固定部の一例の説明図であり、（ｊ）は、同図（ｉ）の断面図である。(A) is explanatory drawing of an example of a spring fixing | fixed part, (b) is sectional drawing of the figure (a), (c) is explanatory drawing of an example of a spring fixing | fixed part, (d ) Is a cross-sectional view of the same figure (c), (e) is an explanatory view of an example of a spring fixing part, (f) is a cross-sectional view of the same figure (e), (g) FIG. 4 is an explanatory view of an example of a spring fixing portion, (h) is a sectional view of FIG. (G), (i) is an explanatory view of an example of a spring fixing portion, and (j) is the same as FIG. It is sectional drawing of figure (i). （ａ）は、本発明の実施形態３の封止接点装置の要部の概略断面図であり、（ｂ）は、同図（ａ）にＢで示す部位の拡大図である。(A) is a schematic sectional drawing of the principal part of the sealing contact apparatus of Embodiment 3 of this invention, (b) is an enlarged view of the site | part shown by B in the figure (a). （ａ）は、本発明の実施形態４の封止接点装置の要部の概略断面図であり、（ｂ）は、同図（ａ）にＣで示す部位の拡大図である。(A) is a schematic sectional drawing of the principal part of the sealing contact apparatus of Embodiment 4 of this invention, (b) is an enlarged view of the site | part shown by C in the figure (a). （ａ）は、本発明の実施形態５の封止接点装置の要部の概略断面図であり、（ｂ）は、同図（ａ）にＤで示す部位の拡大図である。(A) is a schematic sectional drawing of the principal part of the sealing contact apparatus of Embodiment 5 of this invention, (b) is an enlarged view of the site | part shown by D in the figure (a). 従来の封止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 sealing contact apparatus. 同上の封止接点装置の動作説明図である。It is operation | movement explanatory drawing of a sealing contact apparatus same as the above.

Explanation of symbols

１封止接点部
１１封止容器
１１ａ開口
１２ａ固定接点
１３可動接触子
１３ａ可動接点
１４継鉄部
１４ａ挿通孔
１５シャフト
１５ａ規制部
１６可動鉄芯
１８接圧ばね
１９復帰ばね DESCRIPTION OF SYMBOLS 1 Sealing contact part 11 Sealing container 11a Opening 12a Fixed contact 13 Movable contactor 13a Movable contact 14 Relay part 14a Insertion hole 15 Shaft 15a Control part 16 Movable iron core 18 Contact pressure spring 19 Return spring

Claims

A sealing container made of an insulating material having an opening on one surface, a fixed terminal provided with a fixed contact disposed in the sealing container and hermetically joined to the other surface portion of the sealing container, and a movable contact contacting and leaving the fixed contact A movable contact provided in the sealed container, a yoke portion provided with an insertion hole and hermetically joined to the opening of the sealed container, and a movable contact at one end of the insertion hole movably inserted. A shaft provided with a restricting portion that restricts movement to the fixed contact side, and a movable iron that is disposed on one surface side of the yoke portion and moves so that the other end of the shaft is fixed and the movable contact contacts and separates from the fixed contact A movable core is movably housed and a cap is hermetically joined to one side of the yoke. The movable contact is fixed between the other side of the yoke and the movable contact. A contact pressure spring that urges the contact to contact the movable contact with the fixed contact, one surface of the yoke portion, and the movable iron core. A sealing contact portion that includes a return spring that is interposed therebetween and urges the movable iron core in a direction away from the yoke portion, and an electromagnetic drive unit that drives the movable iron core of the sealing contact portion. A sealed contact device characterized by the above.

The sealed contact device according to claim 1, wherein a return spring fixing portion for fixing the return spring is integrally formed on one surface side of the yoke portion.

The sealed contact device according to claim 1 or 2, wherein a contact pressure spring fixing portion for fixing a contact pressure spring is integrally formed on the other surface side of the yoke portion.

The sealed contact device according to claim 1, wherein a spring fixing portion for fixing a contact pressure spring to the yoke portion and fixing a return spring is integrally formed.

The sealed contact device according to any one of claims 1 to 4, wherein a fixed portion for fixing a contact pressure spring to the movable contact is formed integrally.