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Structure de commutateur electromagnetique amelioree destinee a un demarreur.

A technology of electromagnetic switches and starters, applied in the direction of electromagnetic relays, electromagnetic relay details, circuits, etc., can solve the problems of increasing the overall length of the switch and adding insulating parts

Inactive Publication Date: 2006-08-16
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This requires an increase in the thickness of the insulation, thereby resulting in an increase in the overall length of the switch

Method used

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  • Structure de commutateur electromagnetique amelioree destinee a un demarreur.
  • Structure de commutateur electromagnetique amelioree destinee a un demarreur.
  • Structure de commutateur electromagnetique amelioree destinee a un demarreur.

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Experimental program
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Embodiment Construction

[0065] Referring now to the attached drawings, especially to the figure 1 , provides an electromagnetic switch 1 according to a first embodiment of the present invention, the electromagnetic switch 1 is used to drive a starter such as starting an automobile engine, and the same reference numerals indicate the same parts in these several drawings.

[0066] The electromagnetic switch 1 includes a cup-shaped yoke 2, an exciting coil 4, a plunger 6, a plunger shaft 7, and a motor contact assembly (details will be described later). The field coil 4 is wound around the bobbin 3 and provided inside the yoke 2 . The plunger 6 is arranged inside the bobbin 3 through the sleeve 5 . The plunger shaft 7 is fixed on the plunger 6 . The motor contact assembly is used to open or close the starter's motor circuit (i.e. the motor drive).

[0067] The yoke 2 is composed of a bottom wall 2a and a cylindrical outer wall 2b. The bottom wall 2a has a circular central opening formed therein. Th...

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Abstract

An electromagnetic switch for use in actuating a starter for automotive vehicles is provided. The switch includes fixed contacts, a moving contact, and a plunger shaft. The moving contact is joined to a plunger shaft through an insulator. The plunger shaft is to be moved magnetically to bring the moving contact into abutment with the fixed contact to establish electric communication between the fixed contact. The switch also includes a rotation holder working to hold the moving contact and the insulator from rotating relative to each other. Use of the rotation holder results in a decrease in wear of the insulator. This eliminates the need for the insulator to have an additional thickness which would be worn down, thus permitting the insulator to be reduced in thickness to shorten the overall length of the switch.

Description

[0001] Cross References to Related Literature [0002] This application claims Japanese Patent Application Nos. 2004-324189, 2004-324212, 2004-364584 filed on November 8, 2004, November 8, 2004, December 16, 2004, and December 17, 2004, respectively and 2004-366398 as priority, the disclosure of which is hereby incorporated by reference. technical field [0003] The present invention generally relates to an electromagnetic switch for opening or closing contacts of an electric motor drive of an automotive engine starter. Background technique [0004] Solenoid switches are known with motor drives for engine starters. For example, Japanese Patent First Publication No. 3-969 discloses an electromagnetic switch including a pair of fixed contacts connected to a motor driver and a movable contact held on one end of a plunger shaft by an insulator. The movable contact abuts against the fixed contacts via the plunger shaft, establishing electrical communication between the fixed co...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H50/00H01H50/60
Inventor 平林崇仓泽忠博宇佐见伸二
Owner DENSO CORP