Normally closed auxiliary contact module and unipolar alternating current contactor with same

Abstract

The invention discloses a normally closed auxiliary contact module and a unipolar alternating current contactor with the same. The normally closed auxiliary contact module includes a housing, a contact support piece, a bridge contact, a stationary contact and a spring, wherein the housing is provided with a tongue-shaped element rest; the contact support piece is mounted in the housing and provided with an open slot; one slot wall of the open slot is fitted in a gas formed between the tongue-shaped element rest and a side cavity wall of an accommodating cavity, so that the contact support piece can perform the oriented movement along the tongue-shaped element rest; the bridge contact is clamped and mounted at the bottom of the contact support piece; and the spring is elastically tensioned and propped between the bottom end of the contact support piece and the bottom cavity wall of the accommodating cavity. The unipolar alternating current contactor comprises the normally closed auxiliary contact module, a base, and a main contact support piece. By adopting the structure, the normally closed auxiliary contact module has the characteristics of simple structure, fewer parts, small size and easiness in assembly, and is applied onto the unipolar alternating contactor to form a unipolar alternating contactor with small size, light weight and extremely compact structure, thereby lowering the product cost.

Description

technical field [0001] The invention relates to a contactor, in particular to a normally closed auxiliary contact module of the contactor and a single-pole AC contactor thereof. Background technique [0002] A contactor is an automatic control appliance that uses a coil to flow current to generate a magnetic field to close the contacts to control the load. [0003] Contactors in the prior art are generally required to be equipped with normally closed auxiliary contacts. The normally closed auxiliary contact module in the prior art generally includes a housing, a contact support, a bridge contact, a contact spring, a static contact, a return spring, a connection terminal and the like. The bridge-shaped contact is clamped in the window of the contact support, and is kept in place by the action of the contact spring to generate contact pressure; the contact support is assembled in the groove in the middle of the shell, and is determined by the outer peripheral contour of the p...

AI Technical Summary

Problems solved by technology

The normally closed auxiliary contact module in the prior art has a complex structure, large volume, and cumbersome assembly, which is not conducive to the miniaturization of the contactor, and causes an increase in the cost of materials and human resources

[0004] A single-pole AC contactor in the prior art is difficult to install auxiliary contact modules due to its small size and compact structure

At present, no unipolar AC contactor with auxiliary contact module has been found. In the prior art, one of the two poles of the bipolar AC contactor is usually transformed into an auxiliary contact to form a pole of the

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