Signal transmission device

Abstract

The invention discloses a signal transmission device including an airtight housing, a push rod, a touch bridge, a support piece, a wiring post, an auxiliary contact board, an auxiliary contact and two signal lines. The push rod is arranged in the housing. The contact bridge sleeves the upper part of the push rod. The support rod is in rigid connection with the contact bridge. The wiring post is arranged above the contact bridge. The auxiliary contact point is fixed above the support piece. The auxiliary contact board is arranged between the auxiliary contact point and the support piece and the end of the auxiliary contact board adjacent to the auxiliary contact point is suspended and the other end of the auxiliary contact board is fixed in the housing. One signa line is connected to the auxiliary contact point while the other signal line is connected to the auxiliary contact board. The sum of the distance from the support board to the auxiliary contact board and the distance from the auxiliary contact board to the auxiliary contact point is smaller than the distance from the contact bridge to the wiring post. By adopting the signal transmission device, error judgment caused by main contact fusion welding can be prevented effectively.

Description

technical field [0001] The present invention relates to the technical field of signal transmission, in particular to a signal transmission device. Background technique [0002] At present, the auxiliary contact and the main contact are generally designed synchronously, and the auxiliary contact is usually used to transmit signals to display the on-off status of the main contact. If the main contacts pass the overload current for a long time, frequent starting and stopping, etc., overheating or welding will occur. The welding phenomenon will have a great impact on the disconnection process of the main contact. If the main contact has a welding phenomenon, then when the auxiliary contact is disconnected (that is, the signal that the auxiliary contact has disconnected the main contact transmitted), the main contact is actually still in the bonding state, and the auxiliary contact cannot transmit the working state of the main contact synchronously, causing the transmitted signa...

AI Technical Summary

Problems solved by technology

If the main contacts pass through the overload current for a long time, frequent starting and stopping, etc., overheating or welding will occur

The welding phenomenon will have a great impact on the disconnection process of the main contact. If the main contact has a welding phenomenon, then when the auxiliary contact is disconnected (that is, the signal that the auxiliary contact has disconnected the main contact transmitted), the main contact is actually still in the bonding state, and the auxiliary contact cannot transmit the working state of the main contact synchronously, causing the transmitted signal to be inconsistent with the actual state, resulting in misjudgment, which is likely to cause serious damage production error

[0003] In addition, the transmitting signal end and the receiving signal end of the prior art are in the same space. If the working environment of the signal sending end is harsh (dusty, humid or toxic gas, etc.), the transmitting signal end and the receiving signal end cannot be in the same space. , but it is necessary to know the state in this space in time and accurately, then the structure type of the prior art can no longer be applied

Images