The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 24, 2001
Filed:
Aug. 03, 2000
Takamisawa Electric Co., Ltd., Tokyo, JP;
Abstract
An electromagnetic relay has an iron core, an armature, a coil wound around the iron core, a yoke, a hinge spring, and a joining structure. The yoke is fastened rigidly to the iron core and has an engaging hole and a fitting portion. The hinge spring is used to support the armature rotatably on the yoke, and the joining structure is used to join the hinge spring to the yoke in the electromagnetic relay. The hinge spring has a tongue and a dish-shaped portion, and the yoke has an engaging hole and a fitting portion for engaging with the tongue and the dish-shaped portion. The hinge spring is joined to the yoke by inserting and fitting the hinge spring into the yoke. This structure serves to simplify the process of assembling the hinge spring to the yoke and drastically reduce the number of assembling steps required. Further, in a flux penetration preventing structure of the electromagnetic relay, a coil bobbin is formed, integral with or separate from a base block, and a venting portion, for allowing air trapped in a center hole in the coil bobbin to be vented therethrough, is formed in an upper flange of the coil bobbin. Therefore, sealing work of the base block of the electromagnetic relay can be performed smoothly and pinhole-free sealing thereof can be provided.