Electromagnetic relay
AssigneeFujitsu Component Limited
InventorsKatsuyuki Takahashi, Yoshinori Kurata, Daishi Kitajima
Life of this patent
Estimating the term…
Abstract
An electromagnetic relay includes: an electromagnet; a twin contact set that includes first twin contacts provided on a first movable spring, and second twin contacts that are provided on a first fixed contact plate and disposed opposite to the first twin contacts; a single contact set that includes a first single contact provided on a second movable spring, and a second single contact that is provided on a second fixed contact plate and disposed opposite to the first single contact; and a card that moves in response to excitation or non-excitation of the electromagnet, and moves the first and the second movable springs simultaneously with the movement of the card.
Claims8
An electromagnetic relay comprising:
- a base;
- an elongated electromagnet having first and second opposite longitudinal sides, and first and second opposite ends;
- a movable card spaced from and substantially parallel to the base and having first and second opposite longitudinal sides corresponding to the longitudinal sides of the electromagnet, and first and second opposing ends,
- wherein the electromagnet is positioned between the base and the card;
- a plurality of first projections that are arranged in a row along a longitudinal direction of the electromagnet, each first projection extending from the base toward the card and being positioned at the first longitudinal side of the electromagnet;
- a plurality of second projections that are arranged in a row along the longitudinal direction of the electromagnet, each second projection extending from the base toward the card and being positioned at the second longitudinal side of the electromagnet;
- an armature that is opposite to the first end of the electromagnet, has one end rotatably fixed to the base, a second end, and is attracted by an electromagnetic force of the electromagnet;
- a return spring that is opposite to the second end of the electromagnet, and has a first end fixed directly to the base and a second end received by the card,
- wherein the card is biased toward the armature by the return spring;
- a twin contact set positioned at the first longitudinal side of the electromagnet and including first twin contacts provided on a first movable spring having a first end received in the base and a second end received in the first longitudinal side of the card, and second twin contacts that are provided on a first fixed contact plate received in the first projection, the second twin contacts being disposed opposite to the first twin contacts;
- and
- a single contact set positioned at the second longitudinal side of the electromagnet and including a first single contact provided on a second movable spring having a first end received in the base and a second end received in the second longitudinal side of the card, and a second single contact that is provided on a second fixed contact plate received in the second projection and that is disposed opposite to the first single contact,
- wherein the card moves parallel to the base via the armature being responsive to excitation of the electromagnet, and simultaneously moves the first and the second movable springs received therein.
Dependencies are inferred from the claim text.