Electromagnetic relay

Patent metadata

Field	Value
Publication number	US-9305718-B2
Application number	US-201414248772-A
Country	US
Kind code	B2
Filing date	Apr 9, 2014
Priority date	Jul 1, 2013
Publication date	Apr 5, 2016
Grant date	Apr 5, 2016

Abstract

An electromagnetic relay, includes: a first movable contact that comes in contact with a first fixed contact; a second movable contact that comes in contact with a second fixed contact; a first elastic body that biases the first movable contact; a second elastic body that biases the second movable contact; a pressing member that presses the first elastic body and contacts the first movable contact to the first fixed contact, presses the second elastic body and contacts the second movable contact to the second fixed contact; wherein the pressing member contacts the second movable contact to the second fixed contact before contacting the first movable contact to the first fixed contact.

First claim

What is claimed is:

1. An electromagnetic relay, comprising:
a first movable contact that comes in contact with a first fixed contact;
a second movable contact that comes in contact with a second fixed contact;
a first elastic body that biases the first movable contact;
a second elastic body that biases the second movable contact; and
a pressing member that presses the first elastic body and contacts the first movable contact to the first fixed contact, presses the second elastic body and contacts the second movable contact to the second fixed contact,
wherein the pressing member contacts the second movable contact to the second fixed contact before contacting the first movable contact to the first fixed contact;
the pressing member includes a first contact pressing portion that presses the first elastic body, and a second contact pressing portion that presses the second elastic body; and
a distance from the first elastic body to the first contact pressing portion is longer than a distance from the second elastic body to the second contact pressing portion.

2. The electromagnetic relay as claimed in claim 1 , wherein contact volumes of the second movable contact and the second fixed contact are larger than contact volumes of the first movable contact and the first fixed contact.

3. The electromagnetic relay as claimed in claim 1 , wherein the pressing member detaches the first movable contact from the first fixed contact and detaches the second movable contact from the second fixed contact, and the pressing member detaches the second movable contact from the second fixed contact after detaching the first movable contact from the first fixed contact.

4. The electromagnetic relay as claimed in claim 1 , wherein the pressing member includes a first detachment portion that detaches the first movable contact from the first fixed contact and a second detachment portion that detaches the second movable contact from the second fixed contact, and
a distance from the first elastic body to the first detachment portion is shorter than a distance from the second elastic body to the second detachment portion.

5. The electromagnetic relay as claimed in claim 4 , wherein the first elastic body includes a third elastic body that is pressed by the first contact pressing portion, and a fourth elastic body that overlaps with the third elastic body and is pressed by the first detachment portion, and
the second elastic body includes a fifth elastic body that is pressed by the second contact pressing portion, and a sixth elastic body that overlaps with the fifth elastic body and is pressed by the second detachment portion.

6. The electromagnetic relay as claimed in claim 1 wherein a width of the first elastic body at a portion with which the first contact pressing portion comes in contact is narrower than a width of the second elastic body at a portion with which the second contact pressing portion comes in contact.

7. The electromagnetic relay as claimed in claim 1 , wherein a direction of a current which flows into the first movable contact or flows out from the first movable contact, and a direction of a current which flows into the first fixed contact or flows out from the first fixed contact are the same direction, and
a direction of a current which flows into the second movable contact or flows out from the second movable contact, and a direction of a current which flows into the second fixed contact or flows out from the second fixed contact are the same direction.

8. An electromagnetic relay comprising:
a first movable contact that comes in contact with a first fixed contact;
a second movable contact that comes in contact with a second fixed contact;
a first elastic body that biases the first movable contact;
a second elastic body that biases the second movable contact; and
a pressing member that presses the first elastic body and contacts the first movable contact to the first fixed contact, presses the second elastic body and contacts the second movable contact to the second fixed contact;
wherein the pressing member contacts the second movable contact to the second fixed contact before contacting the first movable contact to the first fixed contact,
wherein a width of the first elastic body between the first movable contact and a fixed potion of the first elastic body is wider than a width of the second elastic body between the second movable contact and a fixed portion of the second elastic body.

9. An electromagnetic relay comprising:
a first movable contact that comes in contact with a first fixed contact;
a second movable contact that comes in contact with a second fixed contact;
a first elastic body that biases the first movable contact;
a second elastic body that biases the second movable contact; and
a pressing member that presses the first elastic body and contacts the first movable contact to the first fixed contact, presses the second elastic body and contacts the second movable contact to the second fixed contact,
wherein the pressing member contacts the second movable contact to the second fixed contact before contacting the first movable contact to the first fixed contact, and
wherein the first elastic body curves between the first movable contact and a fixed portion of the first elastic body, and the second elastic body curves between the second movable contact and a fixed portion of the second elastic body.

Assignees

• Fujitsu Component Ltd

Inventors

• Iwamoto Daiei

Classifications

• H01H2001/265

  having special features for supporting, locating or pre-stressing the contact blade springs · CPC title

• H01H3/001

  Means for preventing or breaking contact-welding · CPC title

• H01H50/56

  Contact spring sets · CPC title

• H01H1/50 Primary

  Means for increasing contact pressure, preventing vibration of contacts, holding contacts together after engagement, or biasing contacts to the open position · CPC title

• H01H51/2272

  comprising rockable armature, rocking movement around central axis parallel to the main plane of the armature (H01H51/2227 takes precedence) · CPC title