Drives for Electromagnetic Relays

Abstract

The invention provides a driving device of an electromagnetic relay. The driving device comprises an iron core, a coil, a guide rod and a coil framework, wherein the coil is wound on the coil framework, the coil framework is internally provided with the iron core, the coil framework is internally sleeved with a sleeve, a plurality of permanent magnets are fixedly arranged between the sleeve and the coil framework, the iron core is arranged in the sleeve, the axial length of the sleeve is larger than the length of the iron core, the guide rod penetrates through two sides of the coil framework along an axial direction of the sleeve, and the guide rod and the iron core are fixedly connected. The iron core can be magnetized by the permanent magnets by utilizing homopolar opposite arrangement of the permanent magnets, a magnetic field can be generated in the coil when current flows through the coil, the magnetized iron core can be driven to do reciprocating motion along the axial direction of the coil framework, the iron core and the guide rod can restore to original status without reset devices such as a spring, the structure of the whole device is simplified, the stroke displacement of the iron core driving the guide rod to move is large, the requirement on long stroke is realized, and the flux leakage of the driving device of the electromagnetic relay, which is provided by the invention, is greatly reduced.

Description

technical field [0001] The invention relates to a drive device for an electromagnetic relay. Background technique [0002] The electromagnetic relay is generally composed of a driving device, an armature, a contact reed, etc. The driving device is composed of an iron core and a coil. As long as a certain voltage is applied to both ends of the coil, a certain current will flow through the coil, thereby generating an electromagnetic relay. Effect, the armature will overcome the pulling force of the return spring and attract to the iron core under the action of electromagnetic force attraction, thereby driving the moving contact of the armature to pull in the static contact (normally open contact). When the coil is powered off, the electromagnetic attraction will also disappear, and the armature will return to its original position under the reaction force of the spring, so that the moving contact and the original static contact (normally closed contact) will be released. In t...

AI Technical Summary

Problems solved by technology

[0003] The electromagnetic relay has a simple structure and is easy to operate, but with the advancement of science and technology, the electromagnetic relay with a simple structure has been difficult to meet the circuit requirements of single-pole multi-throw (SPNT), and the ordinary electromagnetic relay has a relatively large volume and a short stroke. , the degree of integration is not high, and the electromagnetic drive parts of the traditional open structure of adjacent electromagnetic relays have large magnetic interference with each other, which is not conducive to the structural realization of the product, high-density installation, and strict requirements on the installation environment when used.

Images