Relay having insulation distance between electromagnet and contacts

Patent metadata

Field	Value
Publication number	US-11456136-B2
Application number	US-201916689750-A
Country	US
Kind code	B2
Filing date	Nov 20, 2019
Priority date	Nov 30, 2018
Publication date	Sep 27, 2022
Grant date	Sep 27, 2022

Abstract

Provided is a relay, with which an insulation distance can be maintained while preventing an increase in size of the relay. The relay has a coil, an iron core, an armature which moves by excitation of the coil, a contact terminal which displaces in accordance with the movement of the armature, a pressing member which is attached to the armature and which presses the contact terminal, and a base block having a wall arranged between a first area in which the coil and the iron core are arranged, and a second area in which the contact terminal and the pressing member are arranged, wherein the armature comprises a first portion arranged in the first area and a second portion extending from the first portion and arranged in the second area, and the pressing member is affixed to the second portion.

First claim

The invention claimed is:

1. A relay, comprising:
a coil,
an iron core comprising a shaft arranged in the coil and a protrusion provided on an end tip of the shaft,
an armature which moves by excitation of the coil, the armature comprising a first portion arranged in the first area and a second portion extending from the first portion and arranged in the second area,
a movable contact terminal which displaces in accordance with the movement of the armature,
a pressing member which is attached to the armature and which presses the movable contact terminal,
a base having an insulating wall, having a height which reaches an upper surface of the coil, arranged between a first area in which the coil and the iron core are arranged, and a second area in which the contact terminal and the pressing member are arranged, and
a yoke comprising a first part arranged in the first area which is connected with the protrusion to form a magnetic path, and a second part arranged in the second area which extends so as to be away from the first part,
wherein the pressing member is fixed to the second portion, and
the insulating wall is positioned between the coil and the second part of the yoke, wherein the insulating wall is configured to insulate the coil from the second part.

2. The relay according to claim 1 ,
wherein the iron core further comprises a shaft arranged in the coil, and
wherein the base comprises an extending part which extends from the wall and which is inserted between the head and the coil.

3. The relay according to claim 1 , wherein the base is interposed between the iron core and the yoke.

4. The relay according to claim 3 ,
wherein the base comprises a bottom in which the first portion of the yoke is exposed, and
wherein the first part and an area of the bottom surrounding the first part are covered with an adhesive.

5. The relay according to claim 3 , comprising a bobbin on which the coil is wound and which comprises a cavity into which the iron core is inserted,
wherein the base comprises a first extending part connected to an upper part of the wall and which extends toward the first area, and a second extending part connected to a lower part of the wall and which extends toward the first area.

6. The relay according to claim 1 , wherein the base further comprises a first extending part configured to cover the upper surface of the coil.

7. The relay according to claim 1 , wherein the base further comprises a second extending part configured to cover a lower surface of the coil.

8. The relay according to claim 1 , wherein the second portion supports a bent part of the armature along its end.

Assignees

• Fujitsu Component Ltd

Inventors

• Kubono Kazuo

Classifications

• H01H50/642 Primary

  intermediate part being generally a slide plate, e.g. a card · CPC title

• H01H50/026

  Details concerning isolation between driving and switching circuit · CPC title

• H01H50/648

  intermediate part being rigidly combined with armature (H01H50/66 - H01H50/74 take precedence) · CPC title

• H01H50/18

  Movable parts of magnetic circuits, e.g. armature · CPC title

• H01H50/043 Primary

  Details particular to miniaturised relays (H01H50/042 takes precedence) · CPC title