Electromagnetic relay

• US 9,123,494 B2
• Filed: 03/24/2011
• Issued: 09/01/2015
• Est. Priority Date: 03/14/2011
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: Shinkai, Tetsuo, Masui, Yasuyuki, Yamashita, Tsukasa
• Primary Examiner(s): Ismail, Shawki S
• Assistant Examiner(s): HOMZA, LISA NHUNG
• Application Number:
  US13/981,314
• Publication Number:
  US 20140015628A1
• Time in Patent Office: 1,622 Days
• Field of Search: 335/78
• US Class Current: 1/1
• CPC Class Codes: H01H 50/02 Bases; Casings; Covers frames for mounting two or more relays or for mounting a relay and another electric component H02B1/01, H04Q1/08, H05K
• CPC Class Codes: H01H 50/26 Parts movable about a knife edge
• CPC Class Codes: H01H 50/28 Parts movable due to bending of a blade spring or reed
• CPC Class Codes: H01H 50/305 damping vibration due to functional movement of armature in air-gap H01H50/163
• CPC Class Codes: H01H 50/54 Contact arrangements
• CPC Class Codes: H01H 51/06 Armature is movable between two limit positions of rest and is moved in one direction due to energisation of an electromagnet and after the electromagnet is de-energised is returned by energy stored during the movement in the first direction, e.g. by using a spring, by using a permanent magnet, by gravity
• CPC Class Codes: H01H 9/40 Multiple main contacts for the purpose of dividing the current through, or potential drop along, the arc
• CPC Class Codes: H01H 9/443 using permanent magnets

Abstract

An electromagnetic relay including an electromagnet block having a rod-shaped iron core, a coil wound around the rod-shaped iron core, and a spool interposed between the coil and iron core. A yoke having one end section extends to a section at a side of a magnet pole section of the iron core. An end section of the yoke is arranged so that the magnet pole section has a gap on a base side. A moving iron is pivotably supported by an elastic support of a hinge spring. The electromagnet block is magnetized wherein a section drawn in the moving iron is drawn to the magnet pole section and pivoted to drive a contact switching unit. The hinge spring includes an elastic contacting portion extending toward an opposite side to the elastic support. The moving iron is integrated with a card member that comes in contact with the elastic contacting portion.

Claims

1. An electromagnetic relay comprising:

an electromagnet block comprising a rod-shaped iron core;

a coil wound around an outer peripheral side of the rod-shaped iron core, and a spool interposed between the coil and the rod-shaped iron core;

a yoke having one end section anchored to one end section of the iron core, and other end section extending to a section at a side of a magnet pole section at other end of the iron core, the electromagnet block being arranged on a base so that a gap is formed between the magnet pole section of the iron core and said base;

a hinge spring anchored to the yoke; and

a moving iron including a portion extending into said gap configured to be pivotably supported by an elastic support of the hinge spring with the other end of the yoke, wherein the electromagnet block is adapted to be magnetized such that a section to be drawn in the moving iron is drawn to the magnet pole section of the iron core and pivoted to drive a contact switching unit;

wherein the hinge spring includes an elastic contacting portion extending toward an opposite side to the elastic support from a position anchored to the yoke;

wherein the moving iron is integrated, at an opposite side to the section to be drawn with respect to the moving iron, with a card member that comes in contact with the elastic contacting portion before coming in contact with the yoke; and

wherein the moving iron integrated with the card member is arranged in a region of smaller than or equal to a height dimension of the yoke of the electromagnet block arranged on the base, the elastic contacting portion of the hinge spring is arranged between the card member and the yoke, and the card member includes a first projecting section adapted to be in contact with the elastic contacting portion of the hinge spring and a second projecting section adapted to be in contact with the yoke after the first projecting section comes into contact with the elastic contacting portion of the hinge spring.

2. The electromagnetic relay according to claim 1, wherein the hinge spring includes a section to be guided at an opposite side to the position anchored to the yoke with respect to a supporting position of the moving iron, and the base includes a supporting recessed portion, in which the section of the hinge spring to be guided is arranged.

3. An electromagnetic relay comprising:

an electromagnet block comprising a rod-shaped iron core;

a coil wound around an outer peripheral side of the rod-shaped iron core, and a spool interposed between the coil and the rod-shaped iron core;

a yoke having one end section anchored to one end section of the iron core, and other end section extending to a section at a side of a magnet pole section at other end of the iron core, the electromagnet block being arranged on a base so that a gap is formed between the magnet pole section of the iron core and said base;

a hinge spring anchored to the yoke; and

a moving iron including a portion extending into said gap configured to be pivotably supported by an elastic support of the hinge spring with the other end of the yoke, wherein the electromagnet block is adapted to be magnetized such that a section to be drawn in the moving iron is drawn to the magnet pole section of the iron core and pivoted to drive a contact switching unit;

wherein the hinge spring includes an elastic contacting portion extending toward an opposite side to the elastic support from a position anchored to the yoke;

wherein the moving iron is integrated, at an opposite side to the section to be drawn with respect to the moving iron, with a card member that comes in contact with the elastic contacting portion before coming in contact with the yoke; and

wherein the hinge spring includes a section to be guided at an opposite side to the position anchored to the yoke with respect to a supporting position of the moving iron, and the base includes a supporting recessed portion, in which the section of the hinge spring to be guided is arranged.

4. An electromagnetic relay comprising:

an electromagnet block comprising a rod-shaped iron core;

a coil wound around an outer peripheral side of the rod-shaped iron core, and a spool interposed between the coil and the rod-shaped iron core;

a yoke having one end section anchored to one end section of the iron core, and other end section extending to a section at a side of a magnet pole section at other end of the iron core, the electromagnet block being arranged on a base so that a gap is formed between the magnet pole section of the iron core and said base;

a hinge spring anchored to the yoke; and

a moving iron including a portion extending into said gap configured to be pivotably supported by an elastic support of the hinge spring with the other end of the yoke, wherein the electromagnet block is adapted to be magnetized such that a section to be drawn in the moving iron is drawn to the magnet pole section of the iron core and pivoted to drive a contact switching unit;

wherein the hinge spring includes an elastic contacting portion extending toward an opposite side to the elastic support from a position anchored to the yoke;

wherein the moving iron is integrated, at an opposite side to the section to be drawn with respect to the moving iron, with a card member that comes in contact with the elastic contacting portion before coming in contact with the yoke;

wherein the moving iron integrated with the card member is arranged in a region of smaller than or equal to a height dimension of the yoke of the electromagnet block arranged on the base;

wherein the elastic contacting portion of the hinge spring is arranged between the card member and the yoke; and

wherein the hinge spring includes a section to be guided at an opposite side to the position anchored to the yoke with respect to a supporting position of the moving iron, and the base includes a supporting recessed portion, in which the section of the hinge spring to be guided is arranged.