ELECTROMAGNET DEVICE AND ELECTROMAGNETIC RELAY USING THE SAME

• US 20140055221A1
• Filed: 07/31/2013
• Published: 02/27/2014
• Est. Priority Date: 08/24/2012
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: SUMINO, Toshifumi, YAMAMOTO, Masaaki, SAKAI, Ichinori, KATO, Tatsuro, MURAKAMI, Kazuya
• Granted Patent: US 9,136,080 B2
• Time in Patent Office: Days
• US Class Current: 335/179
• CPC Class Codes: H01H 50/20 movable inside coil and substantially lengthwise with respect to axis thereof; movable coaxially with respect to coil
• CPC Class Codes: H01H 50/26 Parts movable about a knife edge
• CPC Class Codes: H01H 50/36 Stationary parts of magnetic circuit, e.g. yoke
• CPC Class Codes: H01H 50/42 Auxiliary magnetic circuits, e.g. for maintaining armature in, or returning armature to, position of rest, for damping or accelerating movement
• CPC Class Codes: H01H 50/642 intermediate part being generally a slide plate, e.g. a card
• CPC Class Codes: H01H 51/2236 comprising pivotable armature, pivoting at extremity or bending point of armature H01H51/2227 takes precedence

Abstract

The present invention provides an electromagnet device including: an electromagnet block having a spool around which a coil is wound and an iron core inserted in a central hole of the spool; a yoke connected to an end portion of the iron core via a permanent magnet; a movable iron piece pivotably supported on a pivoting shaft center located at an end face edge portion of the yoke, the movable iron piece is adapted to pivot on a basis of magnetization and demagnetization of the electromagnet block, and a protrusion having a linear edge portion which extends in parallel to the pivoting shaft center and the protrusion protrudes from at least either the movable iron piece or the iron core, the protrusion protrudes in a facing direction in which the movable iron piece and the iron core face each other.

Claims

1. An electromagnet device comprising:

an electromagnet block comprising a spool around which a coil is wound and an iron core inserted in a central hole of the spool;

a yoke connected to an end portion of the iron core via a permanent magnet;

a movable iron piece having a pivoting shaft center, the movable iron piece being pivotally disposed at an end face edge portion of the yoke with the pivoting shaft center supported by and disposed in pivotal contact with the end face edge portion of the yoke, the movable iron piece being adapted to pivot on a basis of magnetization and demagnetization of the electromagnet block, and

a protrusion comprising a linear edge portion which extends in parallel to the pivoting shaft center and the protrusion protrudes from at least either the movable iron piece or the iron core, the protrusion protrudes in a facing direction in which the movable iron piece and the iron core face each other,

wherein the movable iron piece is adapted to be in line contact with the iron core via an outer edge portion of the protrusion on magnetization of the electromagnet block, the outer edge portion is located in an outside position as compared with a central axis of the iron core when the electromagnet block is magnetized.

2. The electromagnet device according to claim 1, further comprising a curving surface, that projects towards the facing direction, and is formed in a surface of the protrusion.

3. The electromagnet device according to claim 2, wherein the protrusion is provided in the movable iron piece and the outer edge portion is adapted to be in contact with a magnetic pole surface of the iron core.

4. The electromagnet device according to claim 2, wherein the protrusion is provided in the iron core and the outer edge portion adapted to be in contact with a horizontal portion of the movable iron piece.

5. The electromagnet device according to claim 1, wherein the protrusion is provided in the iron core, and the outer edge portion is adapted to be in contact with a horizontal portion of the movable iron piece.

6. The electromagnet device according to claim 1, wherein the protrusion is provided in the movable iron piece, and the outer edge portion is adapted to be in contact with a magnetic pole surface of the iron core.

7. An electromagnetic relay comprising the electromagnet device according to claim 1.

8. An electromagnetic relay comprising the electromagnet device according to claim 2.

9. An electromagnetic relay comprising the electromagnet device according to claim 3.

10. An electromagnetic relay comprising the electromagnet device according to claim 4.

11. An electromagnetic relay comprising the electromagnet device according to claim 5.

12. An electromagnetic relay comprising the electromagnet device according to claim 6.