Electromagnetic relay manual test switch structure convenient to operate and electromagnetic relay

Abstract

The invention discloses an electromagnetic relay manual test switch structure convenient to operate and an electromagnetic relay. The manual test switch structure comprises an electromagnetic relay shell and also comprises a shift knob, wherein the shift knob is rotatably arranged on the shell, the shift knob locally extends to the shell and is matched with a push clamp of the electromagnetic relay, the shift knob can be shifted to an open or closed state, the push clamp is driven to move along a direction of driving a movable spring sheet of the electromagnetic relay by the shift knob when the shift knob is opened, and the push clamp is released by the shift knob when the shift knob is closed. The shift knob is employed to substitute a knob and is used as a test switch of the electromagnetic relay, the state is more intuitive, a detector is difficult to operate by mistake, a tester is also more convenient to operate, labor is saved, the tester can operate by a single finger, and no tool is needed in a narrow space.

Description

technical field [0001] The invention relates to the field of relays, in particular to a conveniently operated electromagnetic relay manual test switch structure and the electromagnetic relay. Background technique [0002] At present, in the actual application process of the small control relays of the prior art, once the application equipment fails, in addition to the fault detection of the equipment itself, the abnormality detection of the relay is also required to determine whether the equipment failure is caused by the abnormal operation of the relay. When performing anomaly detection on relays, since the application equipment can no longer work normally, it is necessary to perform an anomaly test on the relay under non-excitation conditions (that is, under non-energized conditions). To this end, a test switch is installed on the relay shell, and the test switch is used to drive the push card in the electromagnetic relay to move in the direction of driving the moving reed...

AI Technical Summary

Problems solved by technology

For a relay with only normally closed static contacts, if the resistance between the pins corresponding to the moving contacts and the pins corresponding to the normally closed static contacts is infinite, it means that the moving contacts and the normally closed static contacts can be disconnected normally. Open, the relay function is normal; if the resistance between the pin corresponding to the moving contact and the pin corresponding to the normally closed static contact is close to zero, it means that the moving contact and the normally closed static contact cannot be disconnected normally, indicating that the relay function Abnormal, that is, the relay has failed

[0003] The above test switches are mostly implemented with knobs. Since the knobs can be rotated 360°, and the knobs are mostly designed as circular structures, the state of the knobs is not intuitive enough, and testers are prone to misuse.

In addition, with the knob method, the tester often needs to use at least two fingers to turn the knob, or, in a narrow space, the tester needs to use tools to turn the knob, which makes the operation more inconvenient for the tester

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