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Heavy duty relay with resilient normally-open contact

A technology of normally open contacts and relays, applied in relays, electromagnetic relays, relay parts, etc., can solve problems such as high hardness of tungsten, complex schemes, difficult machining of tungsten, etc.

Active Publication Date: 2005-08-03
TYCO ELECTRONICS AUSTRIA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The problem with this structure is that the tungsten contacts are very expensive due to the high material cost and tungsten is difficult to machine due to its high hardness
and additional AgSnO contacts are required
The solutions known from the prior art for switching high currents from 40 A to 1 kA are therefore complex and expensive

Method used

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  • Heavy duty relay with resilient normally-open contact
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  • Heavy duty relay with resilient normally-open contact

Examples

Experimental program
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Embodiment Construction

[0030] figure 1 A heavy duty relay according to the invention is shown. The switching spring 3 and the normally open spring contact 4 are held at fastening points in the region of their lower edge region on the base 2 made of plastic material. These clamping regions are not described further below. The switching spring and the normally open contact 4 each form a clamped leaf spring. At the area opposite the fastening area, the switching spring 3 and the normally open contact 4 are provided with contacts 5 , 6 , for example in the form of riveted contact beads.

[0031] The changeover spring 3 and the normally open spring contact 4 are made of conductive material, such as copper plate. In this connection, the spring rate of the switching spring 3 is lower than the spring rate of the normally open spring contact 4 . The spring rate of the normally open spring contact 4 is at least approximately 1.5 times the spring rate of the switching spring, at most approximately 8 times ...

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PUM

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Abstract

A heavy duty relay (1) can safely switch a current of 40 A to 1 kA. The heavy duty relay is provided with a changeover spring (3) which can be resiliently deflected by means of a switching force (C) and with a normally-open contact (6), against which a contact point (5) of the changeover spring (3) is electrically conductively pressed in a switching position. The normally-open contact (6) is arranged on a normally-open spring contact (4), which exhibits a higher spring stiffness than the changeover spring (3) and is resiliently deflected in the switching position, and the changeover spring (3) and / or the normally-open spring contact (4) comprises a deflection region (18b) at least partially surrounded by a weakened zone (18a). The spring stiffness of the deflection region (18b) is reduced relative to the region of the changeover spring (3) and / or the normally-open spring contact (4) surrounding the weakened zone.

Description

technical field [0001] The invention relates to a heavy-duty relay through which a current of at least 40 A to about 1 kA can be switched on and off, the relay is provided with a switching spring deflected elastically by the closing force and with at least one normally open contact, the switching spring In the ON position, the contact point is pressed conductively against the at least one normally open contact. Background technique [0002] This heavy-duty relay is used when very high inrush currents from 40A to 1kA have to be generated. In the prior art, starter relays with tungsten contacts are used for this inrush current. For opening and closing, the tungsten contact is first closed so that a high current peak flows through the contact. Only after this, the AgSnO contacts close and conduct current in the contacts. According to this embodiment, it is avoided that in the closed relay the current flows only through the poorly conducting tungsten contacts. [0003] In he...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H31/02H01H1/26H01H50/56H01H50/58H01H50/64
CPCH01H1/50H01H1/16H01H50/56H01H50/642H01H1/26
Inventor 鲁道夫·迈克尔
Owner TYCO ELECTRONICS AUSTRIA