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Electromagnetic contactor

A technology of electromagnetic contactors and moving contacts, which is applied in the direction of electromagnetic relays, relays, electromagnetic relay details, etc., can solve the problem of arc suppression cover blowing away, and achieve the effect of preventing blowing away

Pending Publication Date: 2022-02-22
FUJI ELECTRIC FA COMPONENTS & SYST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Here, if an abnormally large current flows through the contact part of the electromagnetic contactor due to a short-circuit accident, etc., the arc-extinguishing cover may be blown away due to the internal pressure of the arc-extinguishing chamber due to the generated arc gas.

Method used

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  • Electromagnetic contactor
  • Electromagnetic contactor
  • Electromagnetic contactor

Examples

Experimental program
Comparison scheme
Effect test

no. 1 Embodiment approach

[0029] Figure 1 to Figure 5 The electromagnetic contactor 1 according to the first embodiment of the present invention is shown.

[0030] figure 1 It shows the overall structure of the electromagnetic contactor 1, including a lower case 2 and an upper case 3 formed of an insulating synthetic resin material. The terminal parts 4a to 4d each having contacts and the coil terminal 5 of the electromagnet are fixed to the upper case 3, and an arc extinguishing cover covering an arc extinguishing chamber storage part 9 for storing a storage chamber S described later is attached. 7. And the terminal cover 8 which covers the terminal part 4a-4d and the coil terminal 5 of an electromagnet. An electromagnet (not shown) and a drive rod (not shown) for driving the contact portion 6 are accommodated in the lower case 2 .

[0031] figure 2 It is a diagram showing a state where the arc extinguishing cover 7 is removed from the upper case 3 of the electromagnetic contactor 1 . The upper...

no. 2 Embodiment approach

[0059] then, Image 6 and Figure 7 The main part of the electromagnetic contactor 1 which concerns on 2nd Embodiment of this invention is shown. In addition, the same code|symbol is attached|subjected to the same component as the structure of 1st Embodiment, and description is abbreviate|omitted.

[0060] In the arc extinguishing cover 7 of the second embodiment, the pair of engaging leg portions 20 shown in the first embodiment are not formed, and a pair of boss shafts 29 are protrudingly formed on one of the pair of long side wall portions 16 . near the short side wall portion 18. In addition, in the upper case 3 of the second embodiment, the hook engagement portion 26 shown in the first embodiment is not formed on the inner wall of one case outer wall 10a, and the arc extinguishing cover 7 is formed at a position close to the one case outer wall 10a. A pair of boss shafts 29 fit into a pair of boss holes 30 respectively.

[0061] In the electromagnetic contactor 1 havi...

no. 3 Embodiment approach

[0067] then, Figure 8 and Figure 9 The main part of the electromagnetic contactor 1 which concerns on 3rd Embodiment of this invention is shown. In addition, also in the third embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and description thereof will be omitted.

[0068] like Figure 8 As shown in (a), in one case outer wall 10a of the upper case 3 of this embodiment, a first hook portion 31 is formed on the inner wall separated from the opening portion, and a first hook portion 31 is formed on the opening portion side than the first hook portion 31 . There is a second hook 32 . Additionally, if Figure 8 As shown in (b), in one case outer wall 10a of the upper case 3 of this embodiment, a first hook portion 33 is formed on an inner wall separated from the opening portion, and a first hook portion 33 is formed on the side closer to the opening portion than the first hook portion 33 . There is a second hook 3...

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PUM

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Abstract

An electromagnetic contactor (1) comprising: arc extinguishing chambers (S) that are each provided with a contact point section (6); a case (3) that has an arc extinguishing chamber housing section (9) in which the arc extinguishing chambers are housed; and an arc extinguishing cover (7) that is mounted to the case and covers the arc extinguishing chamber housing section. At least one of the case and the arc extinguishing cover has first engagement sections (22, 24) and second engagement sections (23, 25), and the other has third engagement sections (26, 28) that engage with the first engagement sections and the second engagement sections. The case retains the arc extinguishing cover in a first condition, in which the first engagement sections are engaged with the third engagement sections, or in a second condition, in which the second engagement sections are engaged with the third engagement sections.

Description

technical field [0001] The invention relates to an electromagnetic contactor, in particular to a structure for holding an arc-extinguishing cover. Background technique [0002] The electromagnetic contactor includes a lower case and an upper case formed of an insulating synthetic resin material, and a terminal part having contacts and a coil terminal of an electromagnet are respectively fixed on the upper case, and arc extinguishing in the upper case The chamber accommodates a contact unit including a movable contact and a fixed contact. The electromagnet for driving the contact part and the driving rod are accommodated in the lower case. In addition, an arc extinguishing cover for covering a contact part in the arc extinguishing chamber and a terminal cover for covering a coil terminal of an electromagnet are attached to the upper case. [0003] Here, if an abnormally large current flows through the contacts of the electromagnetic contactor due to a short-circuit accident...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H50/02H01H9/30
CPCH01H50/02H01H9/30H01H9/043H01H50/12H01H33/08
Inventor 川岛成则古畑幸生庄司晴纪坂田昌良
Owner FUJI ELECTRIC FA COMPONENTS & SYST CO LTD