A contactor using a plastic clip to fix a static contact

Abstract

The invention discloses a contactor capable of fixing a static contact through a plastic clamping element. The contactor comprises a static contact assembly, a base and the plastic clamping element, wherein the plastic clamping element is U-shaped; notches retracting along the width direction of a contact board are respectively arranged on the two sides of the middle lower part of the contact board, the lower edge of each notch extends out of the base, and the upper edge of each notch is reserved in a mounting hole of the base; the two ends of the opening part of the plastic clamping element are respectively clamped in the notches on the two sides of the contact board and are in interference fit between the lower end edges of the mounting holes of the base and the lower edges of the notches of the contact board; and the closed part of the plastic clamping element is matched in a trough of a lug boss on the lower end edge of each mounting hole of the base. According to the structure, the plastic clamping element is clamped at the middle lower part of the contact board for limiting, thereby greatly improving the utilization rate of a copper material of the contact board, reducing the costs of parts and products, and improving the market competitiveness of the products.

Description

technical field [0001] The invention relates to a contactor, in particular to a contactor which uses a plastic clip to fix a static contact. 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. The contactor is usually composed of electromagnetic system, contact system, arc extinguishing device, insulating shell and accessories. The electromagnetic system generally includes electromagnetic coil, moving iron core and static iron core. The contact system includes moving contact, moving contact It is usually connected with the moving iron core and interlocked with each other. The arc extinguishing device is usually used to quickly cut off the arc to avoid burning the contact system. When the electromagnetic coil of the contactor is energized, it will generate a strong magnetic field, so that the static iron core will generate electromagnetic attractio...

AI Technical Summary

Problems solved by technology

figure 1 It is a schematic diagram of the connection structure between a static contact assembly and a base in the prior art. The static contact assembly includes a contact plate 1' and a static contact 10', and a mounting hole 21' is provided on the base 2'. When the static contact assembly of the contactor is designed to pass through the mounting hole 21' of the base 2' in a vertical manner and requires fastening, the common way is to leave the upper sides of the contact plate 1' of the static contact assembly. The upper shoulder 11', the lower end surface of the upper shoulder 11' of the contact plate 1' abuts against the upper edge of the mounting hole 21', and the lower step part of the end of the contact plate 1' exposed to the base is split into two outward forks The open italic structure 12' makes the italic structure 12' lean against the lower edge of the mounting hole 21', and the upper and lower edge of the mounting hole 21' are opposed by the upper shoulder 11' of the contact plate 1' and the italic structure 12'. Clamping is carried out so that the contact plate 1' is fixed in the mounting hole 21' of the base 2'. In this structure, the shoulder 11' on the upper part of the contact plate 1' will occupy the effective area of ​​the contact plate material (generally a copper plate). area, reducing material usage, the lower step will increase the width of the contact plate 1', thereby increasing the consumption of contact plate materials

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