Electromagnetic relay

• US 6,924,719 B2
• Filed: 04/22/2004
• Issued: 08/02/2005
• Est. Priority Date: 04/24/2003
• Status: Active Grant

• Current Assignee: Omron Corporation
• Original Assignee: Omron Corporation
• Inventors: Yano, Keisuke, Fujiwara, Tetsuya, Saruwatari, Yojiro, Minowa, Ryota, Furusyo, Shinichi
• Primary Examiner(s): Barrera, Ramon M.
• Application Number:
  US10/829,683
• Publication Number:
  US 20050052263A1
• Time in Patent Office: 467 Days
• Field of Search: 335/17, 335 78- 86
• US Class Current: 335/78
• CPC Class Codes: H01H 50/08 Indicators; Distinguishing marks

Abstract

An electromagnetic relay, which reduces power consumption in a coil block and causes an indicator to operate smoothly, is provided. A coil block and a contact switching mechanism are provided on a base plate, a case is covered over the base plate, the coil block is excited and demagnetized to rotate a movable iron piece, and a movable contact piece is operated via a card, whereby a contact is opened and closed. An indicator, which operates following movement of the card by the rotation of the movable iron piece, is provided between the coil block and the contact switching mechanism.

Claims

1. An electromagnetic relay which provides a coil block and a contact switching mechanism on a base plate to cover the base plate with a case and is adapted to excite and demagnetize the coil block to rotate a movable iron piece, and operate a movable contact piece via a card to thereby open and close a contact,

wherein an indicator, which operates following movement of the card by the rotation of the movable iron piece, is arranged between the coil block and the contact switching mechanism.

2. An electromagnetic relay according to claim 1, wherein an insulation wall is formed between the coil block and the contact switching mechanism, and release portions for avoiding interference at the time of rotation of the indicator are formed in the insulation wall.

3. An electromagnetic relay according to claim 1, wherein the indicator comprises an indication piece at an upper end thereof, and the case comprises a projected portion, which forms a space in which the indication piece is movable in a central part on an upper surface thereof.

4. An electromagnetic relay according to claim 2, wherein bearing portions are formed on sides of the insulation wall, and the indicator has an elastically deformable structure comprising pivots which rotatably engages in the bearing portions.

5. An electromagnetic relay according to claim 2, wherein the indicator comprises an indication piece at an upper end thereof, and the case comprises a projected portion, which forms a space in which the indication piece is movable in a central part on an upper surface thereof.

6. An electromagnetic relay according to claim 4, wherein the indicator comprises an indication piece at an upper end thereof, and the case comprises a projected portion, which forms a space in which the indication piece is movable in a central part on an upper surface thereof.