Direct current relay

Patent metadata

Field	Value
Publication number	US-9673009-B2
Application number	US-201615260081-A
Country	US
Kind code	B2
Filing date	Sep 8, 2016
Priority date	Oct 14, 2015
Publication date	Jun 6, 2017
Grant date	Jun 6, 2017

Abstract

Disclosed embodiments relate to a direct current relay. In some embodiments, a direct current relay is capable of reducing noise by attenuating an impact generated between a fixed core and a moving core during an ‘ON’ operation, and by attenuating an impact generated between a shaft and a middle plate during an ‘OFF’ operation.

First claim

What is claimed is:

1. A direct current relay, comprising:
a pair of fixed contacts fixed on one side of a frame;
a movable contact disposed below the pair of fixed contacts configured to move linearly, and configured to contact the pair of fixed contacts or to be separated from the pair of fixed contacts;
a middle plate disposed below the movable contact;
a contact spring disposed between the movable contact and the middle plate;
a fixed core disposed at the middle plate, and including a center with a shaft hole;
a movable core disposed below the fixed core and configured to move linearly;
a shaft including an upper end forming a mounting portion protruding to an upper side of the movable contact, and including a lower end coupled to the movable core; and
a tension spring disposed between the movable contact and the mounting portion.

2. The direct current relay of claim 1 , further comprising a jaw portion formed at the middle plate, and a flange portion mounted on the jaw portion and formed at an upper part of the fixed core.

3. The direct current relay of claim 1 , further comprising an insulating plate disposed between the movable contact and the middle plate, and a lower end of the contact spring disposed on the insulating plate.

4. The direct current relay of claim 1 , further comprising an elastic member disposed on the fixed core.

5. The direct current relay of claim 1 , wherein the shaft comprises a straight-shaped shaft, and the mounting portion comprises a flange.

6. The direct current relay of claim 4 , further comprising a return spring including:
a lower end fixed to a spring groove and formed at an upper part of the movable core,
an intermediate part which is configured to pass through the shaft hole of the fixed core, and
an upper end fixed to the elastic member.

7. The direct current relay of claim 1 , wherein when an external force is not applied to the direct current relay in an interrupted state, if the tension spring and the contact spring are in a force balanced state, the movable contact is configured to be separated from the two fixed contacts.

Assignees

• Lsis Co Ltd

Inventors

• Yang Junhyuk

Classifications

• H01H50/30 Primary

  Mechanical arrangements for preventing or damping vibration or shock, e.g. by balancing of armature · CPC title

• H01H50/305 Primary

  damping vibration due to functional movement of armature (in air-gap H01H50/163) · CPC title

• H01H50/58

  Driving arrangements structurally associated therewith; Mounting of driving arrangements on armature · CPC title

• H01H50/56

  Contact spring sets · CPC title

• H01H51/065

  Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles (details H01H50/20) · CPC title