Panasonic Corporation

Panasonic Electric Works Co., Ltd.

Panasonic Intellectual Property Management Co., Ltd.

Motoharu Kubo

Ritsu Yamamoto

Masahiro Ito

Riichi Uotome

Katsuya Uruma

Tsukasa Nishimura

Masahiro Itou

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.

Contact device

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

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Obihiro, Japan

Motoharu Kubo