JP5529473B2 - Contact device - Google Patents

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JP5529473B2
JP5529473B2 JP2009207379A JP2009207379A JP5529473B2 JP 5529473 B2 JP5529473 B2 JP 5529473B2 JP 2009207379 A JP2009207379 A JP 2009207379A JP 2009207379 A JP2009207379 A JP 2009207379A JP 5529473 B2 JP5529473 B2 JP 5529473B2
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contact
movable
fixed
movable contact
fixed terminal
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JP2011060513A (en
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司 西村
博文 深澤
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Panasonic Corp
Panasonic Holdings Corp
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Panasonic Corp
Matsushita Electric Industrial Co Ltd
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Description

本発明は、接点装置に関するものである。   The present invention relates to a contact device.

従来から、図９に示すように、固定接点３２を有する固定端子３３と、固定接点３２に接離する可動接点３４を有し、挿通孔３５ａが穿設された可動接触子３５と、前記挿通孔３５ａに移動自在に挿通される軸部３７ａ及び当該軸部３７ａの一端に設けられて可動接触子３５の固定接点側３２への移動を規制する当接部３７ｂを有する可動軸３７と、可動接触子３５を固定接点３２側へ付勢する接圧ばね３６と、可動接点３４が固定接点３２に接離するように可動軸３７を駆動させる電磁石ブロック（駆動手段）２とから構成される接点装置が知られている。以下、図５における上下左右を基準として説明を行う。   Conventionally, as shown in FIG. 9, a fixed terminal 33 having a fixed contact 32, a movable contact 34 having a movable contact 34 contacting and separating from the fixed contact 32, and having an insertion hole 35 a, and the insertion A movable shaft 37 having a shaft portion 37a that is movably inserted into the hole 35a, a contact portion 37b that is provided at one end of the shaft portion 37a and restricts the movement of the movable contact 35 to the fixed contact side 32, and a movable shaft 37 A contact constituted by a contact pressure spring 36 that urges the contact 35 toward the fixed contact 32 and an electromagnet block (drive means) 2 that drives the movable shaft 37 so that the movable contact 34 contacts and separates from the fixed contact 32. The device is known. Hereinafter, description will be made with reference to the top, bottom, left and right in FIG.

可動接触子３５は、固定端子３３の並設方向に長い略矩形板状に形成され、固定接点３２側へ張り出した略ドーム状の可動接点３４が長手方向に沿って並設され、可動接点３４間の略中央には挿通孔３５ａが穿設されている。   The movable contact 35 is formed in a substantially rectangular plate shape that is long in the direction in which the fixed terminals 33 are juxtaposed, and a substantially dome-shaped movable contact 34 projecting toward the fixed contact 32 is juxtaposed along the longitudinal direction. An insertion hole 35a is formed in the approximate center between them.

そして、可動接触子３５は、可動軸３７の当接部３７ｂによって固定接点３２側への移動が規制されており、可動軸３７が上方へ移動すると接圧ばね３６の付勢力によって固定接点３２側へ移動する。これにより、可動接点３４が固定接点３２に当接して接点間が導通する。   The movable contact 35 is restricted from moving toward the fixed contact 32 by the contact portion 37b of the movable shaft 37. When the movable shaft 37 moves upward, the urging force of the contact pressure spring 36 causes the fixed contact 32 to move. Move to. As a result, the movable contact 34 comes into contact with the fixed contact 32 and the contacts are conducted.

そして、接点間が導通した際、電流の一部が、固定接点３２の表面を流れ、可動接点３４の表面には固定接点３２とは略反対方向の電流が流れることで、可動接点３４には、当該可動接点３４を固定接点３２から引き離す方向の電磁反発力が働く。   When the contacts are conducted, a part of the current flows on the surface of the fixed contact 32, and a current in a direction substantially opposite to the fixed contact 32 flows on the surface of the movable contact 34. The electromagnetic repulsion force in the direction of pulling the movable contact 34 away from the fixed contact 32 works.

ここで、可動接点３４が、中心からずれた位置で固定接点３２に当接した場合、可動接点３４には不均一な電磁反発力が働いて、可動接触子３５は短手方向に回転力を受けて当接部を中心として傾く。その際、前記電磁反発力の大きさは、接点間に流れる電流値に比例するため、電流値が大きくなるに従って可動接触子３５の傾きが大きくなり、電流値が小さくなるに従って可動接触子３５の傾きが小さくなる。   Here, when the movable contact 34 comes into contact with the fixed contact 32 at a position shifted from the center, a non-uniform electromagnetic repulsive force acts on the movable contact 34 and the movable contact 35 exerts a rotational force in the short direction. Received and tilted around the contact part. At this time, since the magnitude of the electromagnetic repulsion force is proportional to the current value flowing between the contacts, the inclination of the movable contact 35 increases as the current value increases, and the magnitude of the movable contact 35 decreases as the current value decreases. The inclination becomes smaller.

従って、接点間に交流電流が流れた場合、上記電流値が連続的に増減するため、可動接触子３５は、固定接点３２との当接部を中心として振動し、当該振動によって異音が発生する虞がある。   Therefore, when an alternating current flows between the contacts, the current value continuously increases and decreases. Therefore, the movable contact 35 vibrates around the contact portion with the fixed contact 32, and abnormal noise is generated by the vibration. There is a risk of doing.

上記問題を解決するために、図６に示すように、略矩形状の可動接触子３５の長手方向に沿って固定接点３２側へ張り出した略ドーム状の可動接点３４Ａ、３４Ｂを並設し、当該並設方向に沿って可動接点３４Ａに溝部３４ａを形成した接点装置がある（例えば、特許文献１参照）。   In order to solve the above problem, as shown in FIG. 6, substantially dome-shaped movable contacts 34A and 34B projecting toward the fixed contact 32 along the longitudinal direction of the substantially rectangular movable contact 35 are arranged in parallel. There is a contact device in which a groove 34a is formed in a movable contact 34A along the parallel direction (see, for example, Patent Document 1).

上記接点装置では、溝部３４ａが形成されることで可動接点３４Ａに設けられる２つの尖鋭な頂部Ｐ１１、Ｐ１２、及び可動接点３４Ｂの頂部Ｐ１３の３点で、可動接触子３５が固定接点３２に当接することで、可動接触子３５の傾きを抑制して振動による異音の発生を抑えることを目的としている。 Above contact device, at three points of the top P 13 of the two sharp apex P 11, P 12, and the movable contact 34B provided on the movable contact 34A by the groove 34a is formed, the movable contact 35 is fixed contacts The purpose is to suppress the generation of noise due to vibration by suppressing the inclination of the movable contact 35 by abutting on 32.

特開昭５９−１５１７０８号公報JP 59-151708 A

しかしながら、一方の固定接点３２に当接する、頂部Ｐ１１、Ｐ１２は、尖鋭な形状であることから固定接点３２に対する当接面積が小さく、当接状態が不安定となり、可動接触子３５の振動を十分に抑制できない虞があった。 However, the apexes P 11 and P 12 that are in contact with one fixed contact 32 have a sharp shape, so that the contact area with respect to the fixed contact 32 is small, the contact state becomes unstable, and the vibration of the movable contact 35 is caused. May not be sufficiently suppressed.

本発明は、上記事由に鑑みてなされたものであり、その目的は、可動接触子が固定端子に安定して当接し、可動接触子の異音の発生を抑制した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-described reasons, and an object of the present invention is to provide a contact device in which the movable contact is in stable contact with the fixed terminal and the generation of abnormal noise of the movable contact is suppressed. is there.

請求項１の発明は、一対の固定端子と、固定端子に対向して設けられ、３つの略ドーム状の突部が固定端子側へ突設される可動接触子と、前記可動接触子を移動自在に挿通する軸部及び当該軸部の一端に設けられて可動接触子の固定端子側への移動を規制する当接部を有する可動軸と、可動接触子を固定端子側へ付勢する接圧ばねと、可動接触子が固定端子に接離するように可動軸を駆動させる駆動手段とを備え、前記３つの突部は、一直線上に配置されず、当該３つの突部の内、１つの突部は一方の固定端子に接離し、残り２つの突部は他方の固定端子に接離することを特徴とする。   According to the first aspect of the present invention, a pair of fixed terminals, a movable contact provided to face the fixed terminal and having three substantially dome-shaped protrusions projecting toward the fixed terminal, and the movable contact are moved. A shaft that is freely inserted, a movable shaft that is provided at one end of the shaft and has a contact portion that restricts movement of the movable contact to the fixed terminal, and a contact that biases the movable contact toward the fixed terminal. A pressure spring, and a driving means for driving the movable shaft so that the movable contact is in contact with and away from the fixed terminal. The three protrusions are not arranged in a straight line. One of the protrusions contacts and separates from one fixed terminal, and the other two protrusions contact and separate from the other fixed terminal.

この発明によれば、可動接触子に設けられる３つの略ドーム状の突部を介して可動接触子と固定端子とが当接するため、可動接触子は固定端子に対して十分な当接面積を確保できて安定して当接し、更には、可動接触子は、同一直線上に配置されない３つの突部を介して固定端子に当接するため、電磁反発力が発生した際の可動接触子の振動が防止されて異音の発生を確実に抑えることができる。   According to this invention, since the movable contact and the fixed terminal come into contact with each other via the three substantially dome-shaped protrusions provided on the movable contact, the movable contact has a sufficient contact area with respect to the fixed terminal. Since the movable contact contacts the fixed terminal via three protrusions that are not arranged on the same straight line, the vibration of the movable contact when an electromagnetic repulsive force is generated can be secured. Is prevented, and the generation of abnormal noise can be reliably suppressed.

請求項２の発明は、一対の固定端子と、固定端子に対向して設けられる可動接触子と、前記可動接触子を移動自在に挿通する軸部及び当該軸部の一端に設けられて可動接触子の固定端子側への移動を規制する当接部を有する可動軸と、可動接触子を固定端子側へ付勢する接圧ばねと、可動接触子が固定端子に接離するように可動軸を駆動させる駆動手段とを備え、前記一対の固定端子は、一方の固定端子に可動接触子側へ突出する１つの略ドーム状の突部が突設され、他方の固定端子に可動接触子側へ突出する２つの略ドーム状の突部が形成され、前記３つの突部は、一直線上に配置されず、可動接触子に接離することを特徴とする。
The invention of claim 2 includes a pair of fixed terminals, a movable contact provided to face the fixed terminal, a shaft portion through which the movable contact is movably inserted, and a movable contact provided at one end of the shaft portion. A movable shaft having a contact portion for restricting movement of the child toward the fixed terminal, a contact pressure spring for biasing the movable contact toward the fixed terminal, and a movable shaft so that the movable contact contacts and separates from the fixed terminal. And a pair of fixed terminals, wherein one fixed terminal has one substantially dome-shaped protrusion projecting toward the movable contact, and the other fixed terminal has a movable contact side. Two substantially dome-shaped protrusions are formed, and the three protrusions are not arranged in a straight line, but are in contact with or separated from the movable contact.

この発明によれば、一方の固定接点に形成される１つの略ドーム状の突部と他方の固定接点に形成される２つの略ドーム状の突部とを介して可動接触子と固定端子とが当接するため、可動接触子は固定端子に対して十分な当接面積を確保できて安定して当接し、更には、可動接触子は、同一直線上に配置されない３つの突部を介して固定端子に当接するため、電磁反発力が発生した際の可動接触子の振動が防止されて異音の発生を確実に抑えることができる。   According to this invention, the movable contact and the fixed terminal are arranged via one substantially dome-shaped protrusion formed on one fixed contact and two substantially dome-shaped protrusions formed on the other fixed contact. Therefore, the movable contact can secure a sufficient contact area with respect to the fixed terminal and stably abuts. Further, the movable contact is connected via three protrusions that are not arranged on the same straight line. Since it abuts on the fixed terminal, vibration of the movable contact when electromagnetic repulsive force is generated can be prevented, and generation of abnormal noise can be reliably suppressed.

以上説明したように、本発明では、可動接触子が固定端子に安定して当接でき、更には、可動接触子の振動が抑制されて異音の発生を抑えることができるという効果がある。   As described above, according to the present invention, there is an effect that the movable contact can stably come into contact with the fixed terminal, and further, the vibration of the movable contact can be suppressed and the generation of abnormal noise can be suppressed.

本発明の実施形態における接点装置の斜視図を示す。The perspective view of the contact device in the embodiment of the present invention is shown. 同上における接点装置を備えた電磁継電器の分解斜視図を示す。The disassembled perspective view of the electromagnetic relay provided with the contact apparatus in the same as the above is shown. 同上における電磁継電器の外観図を示す。The external view of the electromagnetic relay in the same as above is shown. 同上における電磁継電器の断面図を示す。Sectional drawing of the electromagnetic relay in the same as the above is shown. 従来例における接点装置の概略図を示す。The schematic of the contact device in a prior art example is shown. 同上における接点装置の可動接触子を示す。The movable contact of the contact device in the same as above is shown. 同上における接点装置の要部の断面図を示す。Sectional drawing of the principal part of the contact apparatus in the same as the above is shown.

以下、本発明の実施の形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

（実施形態）
本実施形態の接点装置は、図１に示すように、固定接点３２をそれぞれ有する一対の固定端子３３と、一対の固定接点３２に接離する略ドーム状の可動接点３８１を有して図示しない挿通孔が穿設される可動接触子３８と、前記挿通孔に移動自在に挿通される軸部３７ａ及び当該軸部３７ａの一端に設けられて可動接触子３８の固定接点３２側への移動を規制する当接部３７ｂを有する可動軸３７と、可動接触子３８を固定接点３２側へ付勢する接圧ばね３６と、可動接点３８１が固定接点３２に接離するように可動軸３７を駆動させる電磁石ブロック（駆動手段）２とから構成される。 (Embodiment)
As shown in FIG. 1, the contact device of this embodiment includes a pair of fixed terminals 33 each having a fixed contact 32 and a substantially dome-shaped movable contact 381 that contacts and separates from the pair of fixed contacts 32. The movable contact 38 in which the insertion hole is formed, the shaft portion 37a movably inserted in the insertion hole, and one end of the shaft portion 37a provided to move the movable contact 38 toward the fixed contact 32 side. The movable shaft 37 having a regulating contact portion 37b, the contact pressure spring 36 that urges the movable contact 38 toward the fixed contact 32, and the movable shaft 37 is driven so that the movable contact 381 contacts and separates from the fixed contact 32. And an electromagnet block (driving means) 2 to be operated.

上記構成を有した本実施形態の接点装置と、従来例における接点装置とで異なる点は、可動接触子３８に３つの略ドーム状の可動接点３８１が設けられている点である。なお、その他の構成については同様の符号を付して説明を省略する。   The difference between the contact device of the present embodiment having the above-described configuration and the contact device in the conventional example is that the movable contact 38 is provided with three substantially dome-shaped movable contacts 381. In addition, about another structure, the same code | symbol is attached | subjected and description is abbreviate | omitted.

上記接点装置において、可動接触子３８は、一対の固定端子３３の並設方向に沿って長い略矩形板状に形成されている。そして、可動接触子３８の長手方向一端側には、一方の固定接点３２に接離する可動接点３８１Ａが設けられ、長手方向他端側には、他方の固定接点３２に接離する２つの可動接点３８１Ｂ，３８１Ｃが設けられる。なお、可動接点３８１Ａ〜３８１Ｃを区別しない場合には、可動接点３８１と称す。   In the above contact device, the movable contact 38 is formed in a substantially rectangular plate shape that is long along the parallel direction of the pair of fixed terminals 33. One end of the movable contact 38 in the longitudinal direction is provided with a movable contact 381A that contacts and separates from one fixed contact 32. Two other movable contacts that contact and separate from the other fixed contact 32 are provided at the other end in the longitudinal direction. Contacts 381B and 381C are provided. When the movable contacts 381A to 381C are not distinguished, they are referred to as movable contacts 381.

可動接点３８１Ａ〜３８１Ｃは、それぞれ略ドーム状に形成されており、可動接点３８１Ａ〜３８１Ｃの各頂部Ｐ１〜Ｐ３が固定接点３２に当接する。そのため、可動接点３８１が固定接点３２に対して、従来例の尖鋭な頂部Ｐ１１、Ｐ１２で当接する可動接点３４（図７参照）に比べて大きな面積で当接することができ、接点間の当接状態が安定する。 The movable contacts 381A to 381C are each formed in a substantially dome shape, and the top portions P 1 to P 3 of the movable contacts 381A to 381C are in contact with the fixed contact 32. Therefore, the movable contact 381 can abut on the fixed contact 32 with a larger area than the movable contact 34 (see FIG. 7) that abuts at the sharp apexes P 11 and P 12 of the conventional example. The contact state is stable.

また、可動接点３８１Ａは、可動接触子３８の一端側において短手方向略中央に配置され、可動接点３８１Ｂ，３８１Ｃは、可動接触子３８の他端側において短手方向に並設されて、３つの可動接点３８１Ａ〜３８１Ｃは、同一直線上に配置されない。そのため、可動接触子３８は固定接点３２に対して、同一直線上にない３つの可動接点３８１Ａ〜３８１Ｃで当接するため、可動接触子３８に電磁反発力が作用した場合であっても可動接触子３８の傾きが抑制されて、可動接触子３８の振動を確実に防止することができる。   In addition, the movable contact 381A is arranged at the center in the short side direction on one end side of the movable contact 38, and the movable contacts 381B and 381C are arranged in parallel in the short side on the other end side of the movable contact 38. The two movable contacts 381A to 381C are not arranged on the same straight line. Therefore, since the movable contact 38 comes into contact with the fixed contact 32 at three movable contacts 381A to 381C that are not on the same straight line, even when an electromagnetic repulsive force acts on the movable contact 38, the movable contact 38 The inclination of 38 is suppressed, and the vibration of the movable contact 38 can be surely prevented.

よって、本実施形態の接点装置では、可動接触子３８に電磁反発力が発生した場合であっても、可動接触子３８に振動が発生せずに当該振動に起因する異音の発生を確実に防止することができる。   Therefore, in the contact device according to the present embodiment, even when an electromagnetic repulsion force is generated in the movable contact 38, the generation of abnormal noise due to the vibration is surely generated without generating the vibration in the movable contact 38. Can be prevented.

そして、上記本実施形態の接点装置は、例えば、図２〜４に示すような電磁継電器に用いられ、当該電磁継電器は、中空箱型のケース４内に、電磁石ブロック（駆動手段）２と接点ブロック３とを一体に組み合わせて構成される内器ブロック１を収納する。以下、図２における上下左右を基準とし、上下左右方向と直交する方向を前後方向とする。   The contact device of the present embodiment is used, for example, in an electromagnetic relay as shown in FIGS. 2 to 4, and the electromagnetic relay is connected to an electromagnetic block (driving means) 2 and a contact in a hollow box type case 4. The internal unit block 1 configured by integrally combining the block 3 is accommodated. Hereinafter, the vertical and horizontal directions in FIG. 2 are used as a reference, and the direction orthogonal to the vertical and horizontal directions is the front and rear direction.

電磁石ブロック２は、絶縁材料から形成され励磁巻線２２が巻装される中空筒状のコイルボビン２１、及び励磁巻線２２の両端に各々接続されるコイル端子２３、及びコイルボビン２１の筒内に固定され通電された励磁巻線２２によって磁化される固定鉄心２４、及び固定鉄心２４とはコイルボビン２１の軸方向に対向してコイルボビン２１の筒内に配置され励磁巻線２２の通電の入切に応じて固定鉄心２４に吸引されてコイルボビン２１の筒内を軸方向に移動する可動鉄心２５、及び磁性材料からなりコイルボビン２１を包囲する継鉄２６、及びコイルボビン２１の筒内に配設されて可動鉄心２５を下方へ付勢する復帰ばね２７を備える。   The electromagnet block 2 is formed of an insulating material and is fixed to a hollow cylindrical coil bobbin 21 around which the excitation winding 22 is wound, a coil terminal 23 connected to both ends of the excitation winding 22, and the coil bobbin 21 in the cylinder. The fixed iron core 24 magnetized by the energized excitation winding 22 and the fixed iron core 24 are arranged in the cylinder of the coil bobbin 21 so as to oppose each other in the axial direction of the coil bobbin 21 and according to whether the energization winding 22 is turned on or off. A movable iron core 25 that is attracted to the fixed iron core 24 and moves in the axial direction of the coil bobbin 21, a yoke 26 made of a magnetic material and surrounding the coil bobbin 21, and a movable iron core disposed in the cylinder of the coil bobbin 21. A return spring 27 that biases 25 downward is provided.

また、接点ブロック３は、絶縁材料から後面が開口した中空箱型に形成される封止容器３１、及び略円柱状に形成されて封止容器３１の前面に貫設されて下面に固定接点３２が設けられる固定端子３３、及び固定接点３２に接離する可動接点３８１を有して封止容器３１内に配設される可動接触子３８、及び可動接触子３８の後面に当接し可動接触子３８を固定接点３２側へ付勢する接圧ばね３６、及び上端に可動接触子３８が接続され、下端部が可動鉄心２５と連結されて可動鉄心２５の移動に連動する可動軸３７、及び固定端子３３に接続される主端子３３１備える。   The contact block 3 includes a sealing container 31 formed in a hollow box shape whose rear surface is opened from an insulating material, and is formed in a substantially cylindrical shape so as to penetrate the front surface of the sealing container 31 and be fixed to the lower surface on the lower surface. A movable contact 38 having a fixed terminal 33 provided with a movable contact 381 disposed in the sealing container 31 with a movable contact 381 contacting and separating from the fixed contact 32, and a movable contact contacting the rear surface of the movable contact 38 A contact pressure spring 36 that urges 38 toward the fixed contact 32 side, a movable contact 38 is connected to the upper end, a movable shaft 37 that is coupled to the movable iron core 25 at the lower end and linked to the movement of the movable iron core 25, and a fixed A main terminal 331 connected to the terminal 33 is provided.

コイルボビン２１は、樹脂材料により前端及び後端に鍔部２１ａ、２１ｂが形成された中空円筒状に形成され、円筒部２１ｃの外周には励磁巻線２２が巻回されている。また、円筒部２１ｃの軸方向略中央には鍔部２１ｄが形成されている。   The coil bobbin 21 is formed in a hollow cylindrical shape with flanges 21a and 21b formed at the front and rear ends of a resin material, and an excitation winding 22 is wound around the outer periphery of the cylindrical portion 21c. Further, a flange portion 21d is formed at the approximate center in the axial direction of the cylindrical portion 21c.

コイル端子２３は、銅等の導電性材料から形成され、コイルボビン２１の鍔部２１ｄの図示しない嵌合孔に嵌合される基部２３ａと、当該基部２３ａから略垂直に延設される端子部２３ｂとから形成されている。   The coil terminal 23 is made of a conductive material such as copper, and has a base portion 23a fitted into a fitting hole (not shown) of the flange portion 21d of the coil bobbin 21, and a terminal portion 23b extending substantially vertically from the base portion 23a. And is formed from.

励磁巻線２２は、一対のコイル端子２３の端子部２３ｂに各端部がそれぞれ接続される。   Each end of the excitation winding 22 is connected to the terminal portion 23 b of the pair of coil terminals 23.

継鉄２６は、コイルボビン２１の前端側に配設される略矩形板状の第一の継鉄板２６Ａと、コイルボビン２１の後端側に配設される略矩形板状の第二の継鉄板２６Ｂと、第二の継鉄板２６Ｂの左右両端より前方へ向けて延設され、第一の継鉄板２６Ａに接続される一対の第三の継鉄２６Ｃとから構成される。   The yoke 26 includes a substantially rectangular plate-shaped first yoke plate 26 </ b> A disposed on the front end side of the coil bobbin 21 and a substantially rectangular plate-shaped second yoke plate 26 </ b> B disposed on the rear end side of the coil bobbin 21. And a pair of third yokes 26C that extend forward from the left and right ends of the second yoke plate 26B and are connected to the first yoke plate 26A.

第一の継鉄板２６Ａは、前面略中央には凹部２６ａが形成されており、当該凹部２６ａの底面には挿通孔２６ｂが形成されている。また、第一の継鉄板２６Ａの後面には、前面が開口した略円筒状に形成されて開口周縁に鍔部２８ａが形成されたプランジャキャップ２８が対向配置されて鍔部２８ａが溶着等によって固定される。つまり、挿通孔２６ｂとプランジャキャップ２８の内径部とが連通する。   The first yoke plate 26A has a recess 26a formed at the approximate center of the front surface, and an insertion hole 26b formed in the bottom surface of the recess 26a. Also, a plunger cap 28 having a substantially cylindrical shape with an open front surface and a flange portion 28a formed on the periphery of the opening is opposed to the rear surface of the first yoke plate 26A, and the flange portion 28a is fixed by welding or the like. Is done. That is, the insertion hole 26 b communicates with the inner diameter portion of the plunger cap 28.

そして、プランジャキャップ２８の円筒部２８ｂ内における底面側には、磁性材料から略円柱状に形成された可動鉄心２５が配設され、更に、円筒部２８ｂの開口側には第一の継鉄板２６Ａの挿通孔２６ｂを介して、磁性材料から略円柱状に形成された固定鉄心２４が挿入される。これによって、コイルボビン２１内（プランジャキャップ２８内）において可動鉄心２５と固定鉄心２４とが対向配置される。   A movable iron core 25 formed in a substantially columnar shape from a magnetic material is disposed on the bottom surface side in the cylindrical portion 28b of the plunger cap 28, and the first yoke plate 26A is disposed on the opening side of the cylindrical portion 28b. The fixed iron core 24 formed from a magnetic material into a substantially cylindrical shape is inserted through the insertion hole 26b. Thus, the movable iron core 25 and the fixed iron core 24 are arranged to face each other in the coil bobbin 21 (in the plunger cap 28).

また、固定鉄心２４の前端に形成される鍔部２４ａが、第一の継鉄板２６Ａの凹部２６ａに嵌まり込み、第一の継鉄板２６Ａの前面に溶着等によって固定されるキャップ部材４５によって固定鉄心２４の抜け止めがなされる。具体的に説明すると、キャップ部材４５は、略矩形平板状に形成されてその略中央部に前方へ向けて突出する突部４５ａが形成される。そして、突部４５ａが突出した分だけキャップ部材４５と第一の継鉄板２６Ａとの間に空間ができ、当該空間に固定鉄心２４の鍔部２４ａを収納した状態で、キャップ部材４５と第一の継鉄板２６Ａとが接合される。   Further, a flange portion 24a formed at the front end of the fixed iron core 24 is fitted into the concave portion 26a of the first yoke plate 26A and fixed by a cap member 45 fixed to the front surface of the first yoke plate 26A by welding or the like. The iron core 24 is prevented from coming off. If it demonstrates concretely, the cap member 45 will be formed in the substantially rectangular flat plate shape, and the protrusion part 45a which protrudes toward the front will be formed in the approximate center part. Then, a space is created between the cap member 45 and the first yoke plate 26A by the amount of the protrusion 45a protruding, and the cap member 45 and the first member are in a state in which the flange portion 24a of the fixed iron core 24 is stored in the space. The yoke plate 26A is joined.

また、コイルボビン２１における円筒部２１ｃの内径は、鍔部２１ｄよりも前方側ではプランジャキャップ２８の外形と略等しく、鍔部２１ｄよりも後方側では前方側よりも拡径されている。そのため、円筒部２１ｃの内径部において鍔部２１ｄよりも後方側では、プランジャキャップ２８の外形と円筒部２１ｃの内壁との間に隙間が生じ、当該隙間には、磁性材料からなる円筒状のブッシュ２６Ｄが嵌合される。そして、ブッシュ２６Ｄは、継鉄２６と固定鉄心２４と可動鉄心２５と共に磁気回路を形成している。   Further, the inner diameter of the cylindrical portion 21c in the coil bobbin 21 is substantially equal to the outer shape of the plunger cap 28 on the front side of the flange portion 21d, and is larger in diameter than the front side on the rear side of the flange portion 21d. Therefore, a gap is formed between the outer shape of the plunger cap 28 and the inner wall of the cylindrical portion 21c on the rear side of the flange portion 21d in the inner diameter portion of the cylindrical portion 21c, and a cylindrical bush made of a magnetic material is formed in the gap. 26D is fitted. The bush 26 </ b> D forms a magnetic circuit together with the yoke 26, the fixed iron core 24, and the movable iron core 25.

復帰ばね２７は、固定鉄心２４の軸方向に形成される挿通孔２４ｂを挿通すると共に、後端が可動鉄心２５の前面と当接し、前端がキャップ部材４５の後面に当接する。更に、復帰ばね２７は、可動鉄心２５とキャップ部材４５との間に圧縮状態で設けられており、可動鉄心２５を後方へ弾性付勢するものである。   The return spring 27 is inserted through the insertion hole 24 b formed in the axial direction of the fixed iron core 24, the rear end is in contact with the front surface of the movable iron core 25, and the front end is in contact with the rear surface of the cap member 45. Further, the return spring 27 is provided in a compressed state between the movable iron core 25 and the cap member 45, and elastically biases the movable iron core 25 backward.

可動軸３７は、非磁性材料から前後方向に長い長尺丸棒状に形成される軸部３７ａと、当該軸部３７ａの前端に形成される鍔状の当接部３７ｂとから構成される。   The movable shaft 37 includes a shaft portion 37a formed from a nonmagnetic material in the shape of a long round bar that is long in the front-rear direction, and a hook-shaped contact portion 37b formed at the front end of the shaft portion 37a.

軸部３７ａは、キャップ部材４５の凸部４５ａの略中央に形成される挿通孔４５ｂ、及び復帰ばね２７を挿通し、先端に形成されるねじ部３７ｃが、可動鉄心２５の軸方向に形成されるねじ孔２５ａに螺合することで可動鉄心２５と接続される。   The shaft portion 37 a is inserted through the insertion hole 45 b formed at the approximate center of the convex portion 45 a of the cap member 45 and the return spring 27, and a screw portion 37 c formed at the tip is formed in the axial direction of the movable core 25. The movable iron core 25 is connected to the screw hole 25a.

また、当接部３７ｂは、略円盤状に形成され、可動接触子３８の固定接点側への移動を規制する。   The contact portion 37b is formed in a substantially disk shape and restricts the movement of the movable contact 38 toward the fixed contact.

可動接触子３８は、略矩形板状に形成され、長手方向一端側に略ドーム状の可動接点３８１Ａが設けられ、長手方向他端側には２つの略ドーム状の可動接点３８１Ｂ，３８Ｃが並設されている。   The movable contact 38 is formed in a substantially rectangular plate shape, and is provided with a substantially dome-shaped movable contact 381A on one end in the longitudinal direction, and two substantially dome-shaped movable contacts 381B and 38C are arranged on the other end in the longitudinal direction. It is installed.

可動接点３８１Ａ〜３８１Ｃは、それぞれ固定接点３２側へ膨出した略ドーム状に形成され、可動接触子３８の前面において同一直線上に並ばないように配置される。具体的に説明すると、可動接点３８１Ａは、可動接触子３８の短手方向略中央に配置され、可動接接点３８１Ｂ，３８１Ｃは、可動接触子３８の短手方向中央を挟んで短手方向に沿って並設される。   The movable contacts 381 </ b> A to 381 </ b> C are each formed in a substantially dome shape that bulges toward the fixed contact 32, and are arranged so as not to be aligned on the same straight line on the front surface of the movable contact 38. More specifically, the movable contact 381A is disposed approximately at the center in the short direction of the movable contact 38, and the movable contact 381B and 381C are along the short direction with the center in the short direction of the movable contact 38 interposed therebetween. Side by side.

また、可動接触子３８の長手方向略中央に形成される挿通孔３８ａには、可動軸３７が挿通する。   In addition, the movable shaft 37 is inserted into the insertion hole 38 a formed at the approximate center in the longitudinal direction of the movable contact 38.

固定端子３３は、銅等の導電性材料により略円柱状に形成され、前端に鍔部３３ａが形成され、下面に可動接点３８１に対向する固定接点３２が固着されている。また、固定端子３３の前面には、軸方向へねじ孔３３ｂが穿設されている。   The fixed terminal 33 is formed in a substantially cylindrical shape using a conductive material such as copper, and has a flange 33a formed at the front end, and a fixed contact 32 facing the movable contact 381 is fixed to the lower surface. Further, a screw hole 33 b is formed in the axial direction on the front surface of the fixed terminal 33.

主端子３３１は、銅等の導電性材料から上下方に長い略平板状に形成される。そして、図示しないねじが、主端子３３１の長手方向一端に穿設される挿通孔３３１ａを挿通して固定端子３３のねじ孔３３ｂに螺合することで、主端子３３１が固定端子３３に接続固定される。   The main terminal 331 is formed in a substantially flat plate shape that is long upward and downward from a conductive material such as copper. Then, a screw (not shown) is inserted into an insertion hole 331 a formed at one end in the longitudinal direction of the main terminal 331 and screwed into the screw hole 33 b of the fixed terminal 33, whereby the main terminal 331 is connected and fixed to the fixed terminal 33. Is done.

封止容器３１はセラミック等の耐熱性材料から後面が開口した中空箱型に形成され、その前面には一対の固定端子３３が貫設する２つの貫通穴３１ａが並設される。そして、固定接点端子３３が、鍔部３３ａを封止容器３１の前面から突出させた状態で貫通穴３１ａに貫設されてろう付けにより接合される。また、封止容器３１の開口周縁にはフランジ５３の一端がろう付けにより接合される。そして、フランジ５３の他端が第一の継鉄板２６Ａとろう付けにより接合されることで封止容器３１は密閉される。   The sealing container 31 is formed in a hollow box shape whose rear surface is opened from a heat resistant material such as ceramic, and two through holes 31a through which a pair of fixed terminals 33 are provided are arranged in parallel on the front surface. And the fixed contact terminal 33 is penetrated by the through-hole 31a in the state which made the collar part 33a protruded from the front surface of the sealing container 31, and is joined by brazing. One end of the flange 53 is joined to the peripheral edge of the opening of the sealing container 31 by brazing. And the sealing container 31 is sealed by joining the other end of the flange 53 to the first yoke plate 26A by brazing.

更に、封止容器３１の開口部には、固定接点３２と可動接点３４との間で発生するアークを、封止容器３１とフランジ５３との接合部から絶縁するための絶縁部材３９が設けられている。   Furthermore, an insulating member 39 for insulating an arc generated between the fixed contact 32 and the movable contact 34 from the joint between the sealing container 31 and the flange 53 is provided at the opening of the sealing container 31. ing.

絶縁部材３９は、セラミックや合成樹脂等の絶縁性材料から前面が開口した略中空箱型に形成され、後面略中央に形成される矩形枠３９ａ内の凹部に前記キャップ部材４５の凸部４５ａが嵌合される。また、絶縁部材３９の周壁の上端側が封止容器３１の周壁の内面に当接することで、固定接点３２と可動接点３４とからなる接点部から、封止容器３１とフランジ５３とからなる接合部の絶縁を図っている。   The insulating member 39 is formed in a substantially hollow box shape whose front surface is opened from an insulating material such as ceramic or synthetic resin, and a convex portion 45a of the cap member 45 is formed in a concave portion in a rectangular frame 39a formed at a substantially central portion of the rear surface. Mated. Further, since the upper end side of the peripheral wall of the insulating member 39 is in contact with the inner surface of the peripheral wall of the sealing container 31, the joint portion formed by the sealing container 31 and the flange 53 is changed from the contact portion formed by the fixed contact 32 and the movable contact 34. Insulation is planned.

更に、絶縁部材３９の内底面の略中央には、接圧ばね３６の内径と略径を有する凹部３９ｃが形成され、当該凹部３９ｃの略中央には、可動軸３７が挿通する挿通孔３９ｂが形成される。そして、当該凹部３９ｃ内に可動軸３７が挿通した接圧ばね３６の下端部が嵌め込まれることで接圧ばね３６の位置ずれが防止される。   Further, a concave portion 39c having an inner diameter and a substantial diameter of the contact pressure spring 36 is formed in the approximate center of the inner bottom surface of the insulating member 39, and an insertion hole 39b through which the movable shaft 37 is inserted is formed in the approximate center of the concave portion 39c. It is formed. Then, the displacement of the contact pressure spring 36 is prevented by fitting the lower end portion of the contact pressure spring 36 into which the movable shaft 37 is inserted into the recess 39c.

また、封止容器３１は、ヨーク５１に周囲を囲まれており、これによって接点間のアークの発生が抑えられている。ヨーク５１は、略矩形状の基部５１１と、基部５１１の両端から当該基部５１１に対して略垂直な向きに延設される一対の延設部５１２とから略コの字状に形成される。そして、延設部５１２の内面側に平板状の永久磁石５２がそれぞれ貼り付けられて、当該永久磁石５２を介して封止容器３１を挟み込んでいる。   In addition, the sealing container 31 is surrounded by the yoke 51, thereby suppressing the generation of an arc between the contacts. The yoke 51 is formed in a substantially U shape from a substantially rectangular base portion 511 and a pair of extending portions 512 extending from both ends of the base portion 511 in a direction substantially perpendicular to the base portion 511. And the flat permanent magnet 52 is each affixed on the inner surface side of the extension part 512, and the sealing container 31 is inserted | pinched through the said permanent magnet 52. FIG.

接圧ばね３６は、前端が可動接触子３５の後面に当接し、絶縁部材３９と可動接触子３８との間に圧縮状態で設けられて、可動接触子３８を固定接点３２側へ弾性付勢する。   The front end of the contact pressure spring 36 abuts against the rear surface of the movable contact 35 and is provided in a compressed state between the insulating member 39 and the movable contact 38 to elastically bias the movable contact 38 toward the fixed contact 32. To do.

ケース４は、樹脂材料によって中空箱状に形成され、内器ブロック１が載置されるベース４１と、ベース４１と共に内器ブロック１を収納するカバー４２とで構成される。   The case 4 is formed of a resin material in a hollow box shape, and includes a base 41 on which the inner unit block 1 is placed, and a cover 42 that houses the inner unit block 1 together with the base 41.

ベース４１は、前後方向に長い略矩形平板状に形成され、長手方向略中央には短手方向に沿って２つの挿通孔４１ａが並設され、前端側には短手方向に沿って２つの挿通孔４１ｂが穿設される。また、ベース４１の周縁部には、段部４１ｃが形成されている。   The base 41 is formed in a substantially rectangular flat plate shape that is long in the front-rear direction, and two insertion holes 41a are provided in parallel in the short direction at the center in the longitudinal direction, and two in the short direction on the front end side. An insertion hole 41b is formed. Further, a step portion 41 c is formed on the peripheral edge portion of the base 41.

そして、挿通孔４１ａにコイル端子２３が挿通し、挿通孔４１ｂに主端子４１ｂが挿通した状態で内器ブロック１がベース４１上に載置される。   The inner block 1 is placed on the base 41 with the coil terminal 23 inserted through the insertion hole 41a and the main terminal 41b inserted through the insertion hole 41b.

カバー４２は、下面が開口した中空箱型に形成され、開口周縁部がベース４１の段部４１ｃに嵌合することでベース４１に組み付けられて、当該ベース４１と共に内器ブロック１を収納する。   The cover 42 is formed in a hollow box shape having an open bottom surface, and the opening peripheral edge portion is assembled to the base 41 by fitting into the step portion 41 c of the base 41, and the inner block 1 is stored together with the base 41.

上記構成からなる電磁継電器では、復帰ばね２７が接圧ばね３６よりも高いばね係数を有しているため、復帰ばね２７の付勢力によって可動鉄心２５が下方へ摺動し、それに伴って可動軸３７も下方へ移動する。これにより、可動軸３７の当接部３７ａの移動に伴って可動接触子３８も下方へ移動するため、初期状態では可動接点３４が固定接点３２と離間した状態で設けられる。   In the electromagnetic relay configured as described above, since the return spring 27 has a higher spring coefficient than the contact pressure spring 36, the movable iron core 25 slides downward by the urging force of the return spring 27, and accordingly the movable shaft 37 also moves downward. As a result, the movable contact 38 also moves downward with the movement of the contact portion 37a of the movable shaft 37, so that the movable contact 34 is provided in a state of being separated from the fixed contact 32 in the initial state.

そして、励磁巻線２２が通電されると可動鉄心２５が固定鉄心２４に吸引されて上方へ摺動するため、可動鉄心２５に連結された可動軸３７も連動して上方へ移動する。これにより、可動軸３７の当接部３７ａが固定接点３２側へ移動し、接圧ばね３６の付勢力により可動接触子３８も固定接点３２側へ移動することで、可動接触子３８に固着された可動接点３８１が固定接点３２に当接して接点間が導通する。   When the exciting winding 22 is energized, the movable iron core 25 is attracted by the fixed iron core 24 and slides upward, so that the movable shaft 37 connected to the movable iron core 25 also moves upward in conjunction with it. As a result, the abutting portion 37a of the movable shaft 37 moves to the fixed contact 32 side, and the movable contact 38 also moves to the fixed contact 32 side by the biasing force of the contact pressure spring 36, thereby being fixed to the movable contact 38. The movable contact 381 is brought into contact with the fixed contact 32 and the contacts are brought into conduction.

ここで、一対の固定端子３３にそれぞれ設けられる固定接点３２の内、一方の固定接点３２には可動接点３８１Ａの頂部Ｐ１が接離し、他方の固定接点３２には可動接点３８１Ｂの頂部Ｐ２及び可動接点３８１Ｃの頂部Ｐ３が接離する。ここで、略ドーム状に可動接点３８１Ａ〜３８１Ｃの各頂部Ｐ１〜Ｐ３は、従来例における尖鋭な頂部Ｐ１１、Ｐ１２（図７参照）に比べて、固定接点３２に対する接触面積が大きく、固定接点３２に対して安定して接触することができ、更には、可動接触子３８が同一直線上に配置されない３つの頂部Ｐ１〜Ｐ３を介して固定接点３２に当接するため、可動接点３８１に対して電磁反発力が発生した場合であっても可動接触子３８の傾きが抑えられて当該傾きが連続して起こることに起因する異音の発生を防止することができる。 Among the fixed contacts 32 provided on a pair of fixed terminals 33, one of the fixed contact 32 apart top P 1 of the movable contact 381A is contact, top P 2 of the movable contact 381B to the other fixed contact 32 and top P 3 of the movable contact 381C is separable. Here, each of the apexes P 1 to P 3 of the movable contacts 381A to 381C in a substantially dome shape has a larger contact area with respect to the fixed contact 32 than the sharp apexes P 11 and P 12 (see FIG. 7) in the conventional example. The movable contact 38 can be stably contacted with the fixed contact 32, and further, the movable contact 38 abuts on the fixed contact 32 via the three top portions P 1 to P 3 that are not arranged on the same straight line. Even when an electromagnetic repulsive force is generated with respect to the contact 381, the inclination of the movable contact 38 is suppressed, and the generation of abnormal noise due to the continuous occurrence of the inclination can be prevented.

また、頂部Ｐ１〜Ｐ３の扁平率を接圧ばね３６のばね圧等を考慮して設定することで、可動接点３８１と固定接点３２との接触状態を更に安定させることができる。 Moreover, the contact state between the movable contact 381 and the fixed contact 32 can be further stabilized by setting the flatness of the top portions P 1 to P 3 in consideration of the spring pressure of the contact pressure spring 36 and the like.

なお、本実施形態では、同一直線上にない略ドーム状の３つの可動接点３８１Ａ〜３８１Ｃを可動接触子３８に形成されているが、一対の固定接点３２の内、一方の固定端子３３に略ドーム状の固定接点を１つ設けて他方の固定端子３３に略ドーム状の固定接点を２つ設けるものであってもよい。ただし、上記の場合において、３つの固定接点は同一直線上に配置されないものとする。   In the present embodiment, three movable contacts 381A to 381C that are not on the same straight line and are substantially dome-shaped are formed on the movable contact 38, but one fixed terminal 33 of the pair of fixed contacts 32 is substantially omitted. One dome-shaped fixed contact may be provided, and the other fixed terminal 33 may be provided with two substantially dome-shaped fixed contacts. However, in the above case, the three fixed contacts are not arranged on the same straight line.

２ 電磁石ブロック（駆動手段）
３２ 固定接点
３３ 固定端子
３６ 接圧ばね
３７ 可動軸
３７ａ 軸部
３７ｂ 当接部
３８ 可動接触子
３８ａ 挿通孔
３８１（３８１Ａ〜３８１Ｃ） 可動接点（突部） 2 Electromagnet block (drive means)
32 fixed contact 33 fixed terminal 36 contact pressure spring 37 movable shaft 37a shaft portion 37b abutting portion 38 movable contact 38a insertion hole 381 (381A to 381C) movable contact (projecting portion)

Claims (2)

一対の固定端子と、
固定端子に対向して設けられ、３つの略ドーム状の突部が固定端子側へ突設される可動接触子と、
前記可動接触子を移動自在に挿通する軸部及び当該軸部の一端に設けられて可動接触子の固定端子側への移動を規制する当接部を有する可動軸と、
可動接触子を固定端子側へ付勢する接圧ばねと、
可動接触子が固定端子に接離するように可動軸を駆動させる駆動手段とを備え、
前記３つの突部は、同一直線上に配置されず、当該３つの突部の内、１つの突部は一方の固定端子に接離し、残り２つの突部は他方の固定端子に接離することを特徴とする接点装置。 A pair of fixed terminals;
A movable contact provided opposite to the fixed terminal and having three substantially dome-shaped protrusions protruding toward the fixed terminal;
A movable shaft having a shaft portion through which the movable contact is movably inserted, and a contact portion provided at one end of the shaft portion to restrict movement of the movable contact toward the fixed terminal;
A contact pressure spring that biases the movable contact toward the fixed terminal;
Drive means for driving the movable shaft so that the movable contactor contacts and separates from the fixed terminal;
The three protrusions are not arranged on the same straight line. Among the three protrusions, one protrusion contacts and separates from one fixed terminal, and the remaining two protrusions contact and separate from the other fixed terminal. A contact device characterized by that. 一対の固定端子と、
固定端子に対向して設けられる可動接触子と、
前記可動接触子を移動自在に挿通する軸部及び当該軸部の一端に設けられて可動接触子の固定端子側への移動を規制する当接部を有する可動軸と、
可動接触子を固定端子側へ付勢する接圧ばねと、
可動接触子が固定端子に接離するように可動軸を駆動させる駆動手段とを備え、
前記一対の固定端子は、一方の固定端子に可動接触子側へ突出する１つの略ドーム状の突部が突設され、他方の固定端子に可動接触子側へ突出する２つの略ドーム状の突部が形成され、
前記３つの突部は、同一直線上に配置されず、可動接触子に接離することを特徴とする接点装置。 A pair of fixed terminals;
A movable contact provided to face the fixed terminal;
A movable shaft having a shaft portion through which the movable contact is movably inserted, and a contact portion provided at one end of the shaft portion to restrict movement of the movable contact toward the fixed terminal;
A contact pressure spring that biases the movable contact toward the fixed terminal;
And drive means for the movable contactor to drive the movable shaft toward and away from the fixed terminal,
In the pair of fixed terminals, one fixed terminal is provided with one substantially dome-shaped protrusion projecting toward the movable contact, and the other fixed terminal is projected with two substantially dome-shaped protrusions. A protrusion is formed,
3. The contact device according to claim 1, wherein the three protrusions are not arranged on the same straight line but are brought into contact with and separated from the movable contact.
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