A time relay socket

Abstract

A time relay socket, the housing is provided with eight jacks, the conductive piece corresponding to the jack and the socket end on it, the conductive piece is located in the cavity between the housing and the cover plate, each of the two ends of the cover plate There are four terminal blocks, one cover plate screw seat and two insulating partitions; the cover plate screw seat separates the four terminal blocks at the same end into two groups, and the two terminal blocks of each group are protruded from the cover plate Separated by insulating partitions, the terminal of the conductive sheet is installed on the terminal block; two concave holes and a shell screw seat are provided at both ends of the shell, and the shell screw seat is located between the two hole slots at the same end and connects the same end. The two slots are separated, and the concave space of each slot accommodates a group of 2 terminal blocks with an insulating partition and 2 terminals, thereby avoiding harmful gaps, improving the safety level and pressure resistance.

Description

technical field [0001] The invention relates to a time relay, in particular to a time relay socket. Background technique [0002] The time relay is an electronic control device, it has a control system (also known as input circuit) and a controlled system (also known as output circuit), usually used in automatic control circuits, it actually uses a smaller current to control a larger High Current. The time relay has a socket part, also known as the time relay socket, which includes a base, a bottom plate and eight inserts. There is a high voltage difference between the eight inserts. The base and the base are fixedly connected to form an inner cavity. Eight The insert is packaged in the cavity. Due to the unreasonable structure of the existing time relay socket, the arc ribs are often only set on the shell, or only on the base. For example, the arc ribs are only set on the shell, and the base is set on the corresponding The grooves completely adopt the corresponding relat...

AI Technical Summary

Problems solved by technology

In order to meet the insulation requirements, the existing time relay sockets usually adopt the structure of arc-breaking ribs between the sockets and terminals, but due to the structural limitations of the inserts installed on the base with jacks, Therefore, the matching gap between the arc rib and the base or the bottom plate is very close to the insert, especially the harmful gap near the socket and the terminal is particularly prominent, resulting in poor insulation effect between the guide inserts , the gap still causes arcing

[0003] The existing time relay socket adopts the structure of arc-proof ribs and arc-break grooves near the socket end of the insert to reduce the harmfulness of harmful gaps, but the disadvantage of this structure is that due to technological reasons, the arc-break grooves It cannot be made very deep, and the overlapping area between the arc ribs and the arc slots is very small, so the structure of the arc ribs and arc slots near the end of the socket has a good effect on the insulation between the sockets. Still not ideal, or the extent to which detrimental gaps can be reduced is limited

In addition, due to the limitation of the forming process of the base and the bottom plate, it is difficult to ensure the connection between the arc rib and the arc slot (the top edge of the arc rib is inserted into the arc slot). The alignment accuracy of the arc chute (unless the manufacturing cost of the base and the bottom plate is greatly increased), and the alignment accuracy is directly related to the assembly efficiency of the time relay socket and the scrap rate of parts, in order not to affect the assembly efficiency and reduce the Scrap rate, the matching gap between the arc rib and the arc groove should not be small, and the increase of the matching gap is obviously not conducive to the insulation between the sockets

[0004] The existing time relay socket has not yet seen an ideal technical solution in reducing the harm of the harmful gap near the terminal of the insert. The reason may be that it is necessary to form a practical solution in terms of structural design and manufacturing process. certain degree of difficulty

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