Panasonic Intellectual Property Management Co., Ltd.

Matsushita Electric Works, Ltd.

Panasonic Corporation

Panasonic Electric Works Co., Ltd.

Ritsu Yamamoto

Riichi Uotome

Masahiro Ito

Tsukasa Nishimura

Hideki Enomoto

Motoharu Kubo

Takehiko Toguchi

Katsuya Uruma

Tsutomu Shimomura

Narutoshi Hoshino

Toshiyuki Suzuki

Yoshihisa Fukuda

Takaaki Chuzawa

Ryosuke Ozaki

Mamoru Tateno

Yoji Ikeda

Kiyoshi Goto

Kouji Yokoyama

Hideki Kishi

Yoshiyuki Iwami

Yohji Ikeda

Masahiro Itou

Naoki Inadomi

Toshiyuki Shima

Naoki Seki

Tetsuya Yamada

Hirokazu Asakura

A contact apparatus is provided and includes fixed terminals having fixed contacts, a movable contact member having the movable contacts provided on one surface thereof so as to come into contact or out of contact with the fixed contacts, a first yoke arranged at one side of said one surface of the movable contact member, and a second yoke arranged at a side of the other surface of the movable contact member, the second yoke having one surface facing the first yoke through the movable contact member. The first yoke is larger in volume than the second yoke.

Contact apparatus

In a contact device, rotational movement of a movable contactor with a yoke attached is regulated by the fact that the yoke abuts against a wall surface of a wall portion. In an event where the movable contactor with the yoke attached moves rotationally, the yoke is allowed to abut against only a wall surface in one region obtained by dividing the wall surface by a virtual line passing through a rotation center of the yoke.

Contact device

Provided is a contact device in which all of three movable contacts can be securely brought into contact with fixed contacts. The contact device includes a fixed terminalthat has a fixed contact, a movable terminalthat moves toward and away from the fixed terminaland has three movable contacts, andthat are brought into contact with the fixed contact, and a pressing springthat presses the movable terminaland brings the movable contacts, andinto contact with the fixed contactsat a predetermined pressing force. The point of application of the pressing springis located in a triangle formed by internal tangents of the three movable contacts.

A contact device includes: fixed terminals; a movable contact maker; a pressing spring; an adjustment plate that comes into contact with an upper face of the movable contact maker; a holding portion; a movable shaft; and an electromagnet block. The holding portion is divided into first and second holding portions that are separated from each other. The first and second holding portions are electrically connected to each other via only the adjustment plate, due to the adjustment plate being sandwiched by a first side plate of the first holding portion and a second side plate of the second holding portion. The adjustment plate is moved in extending and contracting directions of the pressing spring, and the adjustment plate and each of the first and second side plates are subjected to resistance welding at a position at which pressing force of the pressing spring is a predetermined value.

Spring load adjustment structure of contact device and spring load adjustment method of contact device

Fit structure of a housing formed of first and second halves is provided. The first half has a fit projection piece having a fit tongue at the tip. The second half has a presser part and an engaging piece constituting a fit groove. The fit projection piece, presser part and engaging piece are formed so that the fit tongue is positioned in the inner part of the fit groove along the root of the presser part. The housing further has a nail stuck out in an inward or outward direction of the housing and a nail holder engaged with the nail. The nail and nail holder are located at one and the other of a part of the fit projection piece and a corresponding part of the engaging piece. The part of the fit projection piece is nearer to the root of the fit projection piece than the fit tongue.

Fit structure of a housing

A sealed receptacle includes a case, a cylindrical member, and a closure plate. The sealed receptacle is configured to house a fixed contact, a movable contact, and an arc protection member. The arc protection member includes a peripheral wall, and a bottom. The peripheral wall is configured to conceal a junction between the case and the cylindrical member from the fixed contact and the movable contact. The bottom is interposed between the movable contact and the closure plate. The sealed receptacle houses a contact pressure provision member configured to bias the movable contact to come into contact with the fixed contact. The contact pressure provision member is interposed between the movable contact and the bottom so as to come into resilient contact with both the movable contact and the bottom irrespective of a position of the movable contact.

This electromagnetic switching device comprises an electromagnetic devicein which a movable corecomes into contact with or separates from a fixed corein response to energization of an excitation coilwound around a coil bobbina contact devicewith a fixed contactand a movable contact which comes into contact with or separates from the fixed contact in conjunction with a movement of the movable coreof the electromagnetic device, and a boxy caseconfigured to house the electromagnetic device and the contact device. The coil bobbinhas a flangeat its end in an axis direction of the coil bobbin, and the casehas, on its inner surface, a recessinto which a periphery of the flangeof the coil bobbin is fitted, and a cushioning memberfor absorbing an impact which is transmitted from the electromagnetic device to the case is disposed in the recess, and the flange of the coil bobbin is supported by the recess through the cushioning member whereby the electromagnetic device is supported in the case.

Electromagnetic switching device

A contact device including a pair of fixed terminalswith a fixed contacteach, a movable armaturewith movable contactswhich contact to or separate from the fixed contacts, a movable shaftconnected to the movable armatureat its one end, a movable coresecured to the opposite endside of the movable shaft, a movable core receiverslid onto the movable shaftso that it faces a surfaceon the movable armature side of the movable coreto receive the movable coredriven by an electromagnetic mechanism, an impact absorberdisposed on a surfaceon the movable armature side of the movable core receiverto absorb an impact generated when the movable corehit the movable core receiver, and a stopper(a movement restriction member) disposed on a surface on the movable armature side of the impact absorberto restrict a movement of the impact absorber

Each movable contactis given a first force by a drive mechanism along a direction for bringing the movable contact into contact with a fixed contactand given a second force through a legby deformation of a supporting memberresulted from an overtravel of the movable plate. The fixed contact and the movable contact are arranged such that a resultant force of the first and the second forces acts in a direction normal to a contact surface defined between the fixed contacts and the movable contacts. So, a component force of the resultant force parallel to the contact surface is not generated, therefore, a side slip of the movable contact can be prevented when the contacts are opened or closed.

In an electromagnetic switching device including a cylindrical part made of a magnetic material with a closed bottom for housing a movable iron core having a movable contact and so constructed as to render the movable contact movable toward and away from a fixed contact, a joint member made of a metallic material with an insertion hole formed substantially in the center thereof for movably receiving a movable shaft fixedly attached to the movable iron core, and a metal plate made of a non-magnetic material with a hole formed substantially in the center thereof with the inner diameter substantially the same as the inner diameter of the cylindrical part, the cylindrical part and the joint member are air-tightly jointed to each other with the metal plate provided therebetween, and the movable iron core is housed in the cylindrical part with a clearance defined between the movable iron core and the joint member corresponding to a required stroke within which the movable contact contacts the fixed contact. This arrangement provides improvement in magnetic efficiency of electromagnet of the device. Accordingly, improved energy saving performance is accomplished as compared with a case of a conventional electromagnetic switching device.

Electromagnetic switching apparatus

A contact apparatus is provided having a permanent magnet disposed in a region where a fixing contact point is mounted to a fixing contact and a movable contact to which a movable contact point is mounted. An arc generated between both the contact points is moved in a lateral direction by the magnetic force of the permanent magnet and stretched. An arc-extinguishing member which is heated by the arc for generating arc-extinguishing gas is provided such as to surround the fixing contact point and the movable contact point.

Contactor

A single-pole relay switch capable of effective arc extinction irrespective of the current flowing directions in which the device is connected in a circuit. The switch has a housing and two sets of contacts located in the housing, each set being composed of a fixed contact and a movable contact. A contact carrier is provided to have first and second movable arms which extend commonly from a bridge and are provided respectively with the two movable contacts. An actuator applies a driving force to move the contact carrier between an ON-position of holding the movable contacts simultaneously in contact respectively with the fixed contacts, and an OFF-position of keeping the movable contacts at respective opening gaps from the fixed contacts. The housing includes a casing which is divided into first and second chambers respectively for receiving the contact sets, each of the first and second chambers being surrounded by a dielectric wall. Permanent magnet are disposed around the casing to stretch the individual arcs in opposing directions to each other and towards the dielectric walls of the first and second chambers, respectively. Thus, the individual arcs can be stretched individually within the separate chambers, i.e., in an isolated condition. Therefore, the individual arcs can be free from merging even when the current flows in such a direction as to drive the arcs in the approaching direction.

Single pole relay switch

A sealed switch has a vessel defining therein a hermetically sealed space which receives a pair of fixed contacts and a movable contact bridging the fixed contact. The movable contact is movable between an ON-position of closing with the fixed contact and an OFF-position of separating from the fixed contacts. Hydrogen gas or hydrogen rich gas is filled in the sealed space in order to suppress arc development between the movable and fixed contacts. The plunger carries at its axial one end the movable contact and carrying at the other axial end an actuator which moves the plunger axially for movement of the movable contact from the OFF-position to the ON-position. An over-travel spring is provided to give a bias for moving the movable contact relative to the plunger in order to develop a contacting pressure between the movable and fixed contacts. The over-travel spring is supported to a spring holder secured to the plunger. The plunger is formed with a threaded portion which extends through the actuator to allow the plunger to move axially relative to the actuator for adjustment of a contact gap between the movable and fixed contact, and the spring holder is formed with stopper protrusions which project in abuttable and slidable relation to the interior surface of the vessel such that the movable contact is prevented from rotating together with the plunger. Accordingly, the spring holder is best utilized to restrict the movable contact from rotating together with the actuator to enable an easy adjustment of the contact gap simply by rotating the actuator.

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Kyotanabe, Japan

Ritsu Yamamoto