Fuji Electric Fa Components & Systems Co., Ltd.

Fuji Electric Co., Ltd.

The Furukawa Electric Co., Ltd.

Hitachi, Ltd.

Elpida Memory, Inc.

Other

Renesas Electronics Corporation

Renesas Technology Corp.

Ps4 Luxco S.a.r.l.

Japan Oil, Gas and Metals National Corporation

Fuji Fa Components & Systems Co., Ltd.

Yasuhiro Naka

Kouetsu Takaya

Kenji Suzuki

Koji Okubo

Yuji Shiba

Yuichi Yamamoto

Hiroyuki Tachikawa

Osamu Kashimura

Masaru Isozaki

Hideo Adachi

Toshikatsu Ohgami

Takashi Tsutsumi

Shinpei Todo

Yutaka Nakamura

Hironobu Ariyoshi

Yuki Tashima

Hiroaki Ikeda

Kunihiko Nishi

Naotaka Tanaka

Masakazu Ishino

Hiroyuki Tenmei

Nobuaki Orita

Yuya Sakurai

Takahiro Naito

Ikuo Yoshida

Satoshi Imasu

Nae Hisano

Koujun Konishi

Shiro Uchiyama

Hideharu Miyake

Shigeo Ohashi

Yoshimi Ono

Yukio Koumura

Masayoshi Sakata

Takayuki Ando

Takashi Shigematu

Yasuo Osone

Mitsuya Itou

Akira Aikawa

Hiroyuki Kobayashi

Yoshiyuki Abe

Kazunari Suzuki

Chuichi Miyazaki

Toshihiro Nakamura

Naoya Kanda

Kenichi Ishii

Akira Kurome

Yukio Kohmura

Masahide Kuwabara

Toshihide Uematsu

Kiyoshi Arima

Yukio Komura

Takahiro Taguchi

Toru Kagoura

Hiroshi Kuraseko

Yasuyuki Nakajima

Toshiaki Tateishi

Masaki Izumo

Koji Ohkubo

Norihisa Shibayama

Tetsuya Kumada

Kenji Kohzu

Kosuke Kitaichi

Shinya Ogane

Koetsu Takaya

Toshikatwsu Ohgami

Takanori Takemoto

Electromagnetic contactor

There is provided an electromagnetic contactor that ensures appropriately preventing a foreign matter from invading an auxiliary contact mechanism housing chamber from a main contact mechanism housing chamber via a through-hole on a partition wall; and a foreign matter from invading the main contact mechanism housing chamber from the auxiliary contact mechanism housing chamber via the through-hole on the partition wall. With an electromagnetic contactor (), a main contact mechanism housing chamber (A) and an auxiliary contact mechanism housing chamber (B) are partitioned by a partition wall (). The partition wall () has a through-hole () through which a coupling shaft () is inserted. A foreign matter invasion prevention mechanism () is provided at a peripheral area of the through-hole ().

The contact device includes a main contact mechanism that includes a pair of main fixed contacts and a main movable contact elastically supported by a movable shaft and disposed to be contactable with and separable from the pair of main fixed contacts, an auxiliary contact mechanism that includes a pair of auxiliary fixed contacts and auxiliary movable contacts disposed in an auxiliary contact holding member connected to the movable shaft so as to be contactable with and separable from the pair of auxiliary fixed contacts, and a contact housing portion that houses the main contact mechanism and the auxiliary contact mechanism. The movable shaft has a main contact support portion supporting the main movable contact and an auxiliary contact support portion supporting the auxiliary contact holding member. The main contact support portion and the auxiliary contact support portion are connected to each other via the auxiliary contact holding member.

Contact device and electromagnetic contactor using same

To provide an electromagnetic contactor that enables electrical connection work of connecting the electromagnetic contactor to another electrical component disposed in a current path to be performed easily and efficiently. An electromagnetic contactor includes a main contact portion; an auxiliary contact portion; a contact housing case that houses the main contact portion and the auxiliary contact portion; an electromagnet unit that drives a movable plunger coupled to a connecting shaft of the main contact portion; main contact electrodes project out of a case wall of the contact housing case to an outside; auxiliary contact electrodes that are connected to a pair of fixed contacts of the auxiliary contact portion and project out of the case wall to an outside; and an auxiliary contact external terminal portion that is connected to the auxiliary contact electrodes and is arranged on a portion of the case wall.

A gradient magnetic field coil device has a main coil arrangement formed by embedding into first resin multiple main coils for generating a gradient magnetic field and a leakage magnetic field, and a shield coil arrangement formed by embedding into second resin multiple shield coils for suppressing the leakage magnetic field, wherein the shield coil arrangement includes a facing area that faces the main coil arrangement and is fixed to the main coil arrangement, and a protruding area that protrudes beyond the main coil arrangement, wherein insulated reinforcing members are embedded into the second resin in the protruding area. Multiple reinforcing members are arranged in a circumferential direction of the shield coil arrangement, and the second resin is preferably filled between the adjacent-to-each-other reinforcing members. The reinforcing members are preferably arranged toward the main coil arrangement with respect to the shield coils.

Gradient magnetic field coil device and magnetic resonance imaging device

An electromagnetic contactor includes a contact mechanism including a pair of fixed contacts having fixed contact portions and interposed in a current conduction path, and a movable contact having a pair of movable contact portions capable of contacting to and separating from the pair of fixed contact portions. At least one of the pair of fixed contacts or the movable contact is formed in a shape to form magnetic fields generating Lorentz forces opposing electromagnetic repulsion forces generated in an opening direction between the fixed contact portions and the movable contact portions when current is conducted. External connection conductors are connected to external connection terminals of the fixed contacts, an attachment direction of fixed portions fixed to the external connection terminal of the fixed contacts is set to cross a current flow direction flowing through the movable contact.

There is provided an electromagnetic contactor which can easily and inexpensively change the DC operation type to the AC operation type. The electromagnetic contactor includes an electromagnet that opens and closes a contact by using DC excitation of a coil, a lower case that accommodates the electromagnet, external coil terminals that are disposed in the lower case beside the electromagnet, and a substrate that is accommodated in the lower case, and that has a rectifier circuit whose input side is connected to the external coil terminals and whose output side is connected to the coil so as to output a DC after converting an input AC to the DC. An inner surface of the lower case has a groove between the electromagnet and the external coil terminals. The substrate is held by being inserted into the groove.

An electromagnetic contactor includes a contact device having a pair of fixed contacts disposed to maintain a predetermined distance and a movable contact disposed so as to contact to and detach from the pair of fixed contacts. An insulating cover, which covers the pair of fixed contacts except for contact portions that contact the movable contact and covers an inner surface of an insulating plate that fixes and holds the fixed contacts, is mounted on the pair of fixed contacts.

An electromagnetic contactor includes a fixed contact portion, a movable contact portion disposed facing the fixed contact portion to contact to and separate from the fixed contact portion, and an arc extinguishing receptacle forming an arc extinguishing chamber housing the fixed contact portion and movable contact portion. Among contact surfaces of the movable contact portion and fixed contact portion facing each other, at least an opposing distance between a contact end portion of the fixed contact portion and a contact end portion of the movable contact portion positioned in a moving direction of an arc generated when separating the movable contact portion from the fixed contact portion is set to increase with increasing proximity to end surfaces on contact end portion sides.

An electromagnetic switch includes a pair of fixed contacts disposed and fixed in a contact housing case with a predetermined distance therebetween; a movable contact disposed in the contact housing case so as to contact and separate from the pair of fixed contacts; and an electromagnet unit which brings the movable contact into and out of contact with the pair of fixed contacts. The electromagnet unit has a magnetic yoke enclosing an exciting coil, a movable plunger having a contact pole surface facing the contact pole surface of the magnetic yoke, and a linking shaft which links the movable plunger and the movable contact, and magnetic paths through which a holding force is generated by external magnetic fluxes generated by a flowing current when the movable contact contacts the pair of fixed contacts, are formed on the contact pole surface of the magnetic yoke.

Electromagnetic switch having magnetic yoke with slits

An electromagnetic contactor includes a contact mechanism having a pair of fixed contacts disposed to maintain a predetermined interval in a longitudinal direction, and a movable contact disposed above the pair of fixed contacts, the movable contact contacting to and detaching from the pair of fixed contacts. Each of the pair of fixed contacts has a fixed contact portion, the movable contact extends in a longitudinal direction thereof and has a pair of movable contact portions contacting the pair of fixed contacts, and the movable contact is disposed so as to move in a vertical direction thereof on a connecting shaft fixed to a movable plunger and is pressed down by a biasing force of a contact spring in a downward direction thereof on a central portion of the movable contact in the longitudinal direction, the movable contact being held on the connecting shaft.

An electromagnetic contactor includes a contact device including a pair of fixed contacts and a movable contact contacting to and separating from the pair of fixed contacts. The pair of fixed contacts includes support conductor portions supported with an upper surface of a contact housing case, and C-shaped portions each including an upper plate portion linked to an end portion of the support conductor portion, an intermediate plate portion extending downward from a side of the upper plate portion opposite to that of the other support conductor portion, and a lower plate portion extending from a lower end of the intermediate plate portion toward a side of the other support conductor portion and formed with a contact portion on an upper surface thereof. The contact housing case includes contact bearing portions bearing a side of the lower plate portions of the pair of fixed contacts opposite to the movable contact.

Electromagnetic contactor including contact bearing portions for bearing fixed contacts

Growing community of inventors

Kounosu, Japan

Yasuhiro Naka