A mechanical self-holding electromagnetic relay

Abstract

The present invention proposes a mechanical self-holding electromagnetic relay, including: an electromagnetic linear drive with a reset function, a push head, a bracket, a drive rod with a reset function, a rotary with a positioning ratchet and a one-way rotation of the ratchet. wheel, a touch switch that realizes conduction through touch pressure; the electromagnetic linear drive is connected with the push head to drive the push head in a straight line; Engage with one end of the drive rod to form a one-way clutch; the other end of the drive rod is provided with a reset device, and the reset device is connected to the bracket; the runner is set on the bracket and connected with the drive rod to drive The runner rotates in one direction; the runner is provided with a convex part and a concave part, and the touch switch is arranged on the lower part of the runner, so that when the convex part turns to the lower part, the touch switch is pressed, and when the concave part turns to the lower part, the touch switch return to the non-conductive state. The proposal provides a better and more reliable electromagnetic relay.

Description

technical field [0001] The invention relates to the field of relay devices, in particular to a mechanical self-holding electromagnetic relay. Background technique [0002] A relay (English name: relay) is an electrical control device, which is an electrical appliance that makes a predetermined step change in the controlled quantity in the electrical output circuit when the change of the input quantity (excitation quantity) reaches the specified requirements. It has an interactive relationship between the control system (also known as the input loop) and the controlled system (also known as the output loop). Usually used in automatic control circuits, it is actually an "automatic switch" that uses a small current to control the operation of a large current. Therefore, it plays the role of automatic adjustment, safety protection, and conversion circuit in the circuit. [0003] The existing circuit automatic switching electrical appliances generally use electromagnetic relays...

AI Technical Summary

Problems solved by technology

There are some defects in this specific method: first, two buttons are required to control the on-off of the load (one for normally closed and one for normally open); secondly, the current when the electromagnetic coil is working will generate heat in the coil, and the alternating current will also generate heat at the same time. Eddy currents are generated, so the relay coil working in the holding state will generate heat accumulation and cause a large temperature rise in the coil, which seriously affects the reliability of the relay operation; in addition, the load is energized, and the electromagnetic coil is always energized to work, which consumes power and energy

[0005] The self-maintaining electromagnetic relay in this state requires two coils to work alternately, the operation process is complicated, and the power-on and power-off operations of the coil need to be controlled by pressing the switch, which increases the labor cost

The power on and off of the control circuit needs to be realized by energizing the upper and lower coils in sequence, which is complicated to operate and inconvenient to use.

One more coil increases the cost of making materials such as switches and circuits, and also increases the volume of the entire relay, which is not suitable for the control of small electrical appliances

Images