Direct current relay and manufacturing method therefor

Abstract

Disclosed are a direct current relay and a manufacturing method therefor. A movable contact part provided in a direct current relay according to an embodiment of the present invention comprises a movable contact and a lower yoke positioned below the movable contact. The lower yoke is configured to attenuate an electromagnetic repulsive force generated by contact between the movable contact and a fixed contact. The movable contact is provided with a coupling protrusion portion that protrudes downward. The lower yoke is provided with a movable contact coupling portion into which the coupling protrusion portion is inserted. The coupling protrusion portion can receive pressure directed radially outward after being inserted into the movable contact coupling portion. The coupling protrusion portion is expanded radially outward by the pressure. Accordingly, the outer circumferential surface of the coupling protrusion portion can be inserted into and coupled to the inner circumferential surface of the lower yoke that forms the movable contact coupling portion. Thus, a separate fastening member for coupling the movable contact and the lower yoke is not required. Accordingly, a method for manufacturing the direct current relay can be simplified.

Description

technical field [0001] The present invention relates to a direct current relay and a manufacturing method thereof, more specifically, to a structure capable of concisely realizing the combination of a lower yoke and a movable contact for offsetting the electromagnetic reaction force of a fixed contact and a movable contact A direct current relay and a method of making the same. Background technique [0002] Direct current relay is a device that uses the principle of electromagnet to transmit mechanical drive or current signal. DC relays, also known as magnetic switches, are usually classified as electrical circuit switching devices. [0003] The DC relay can be operated by connecting an external control power supply. A DC relay includes a fixed core and a movable core that can be magnetized by a control power source. The fixed core and the movable core are arranged adjacent to the bobbin on which the plurality of coils are wound. [0004] When the control power is turned...

AI Technical Summary

Problems solved by technology

[0020] However, such a type of DC relay also has the limitation of only including structural elements for counteracting electromagnetic forces

[0021] Moreover, the above-mentioned type of DC relay has the limitation that no corresponding countermeasures are given to prevent the movable contact from being arbitrarily disengaged during the process of moving the movable contact up and down.

[0022] Furthermore, DC relays of the above-mentioned type also fail to suggest a solution for compactly realizing the coupling between the movable contact and the components arranged adjacent to the movable contact.

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