Relay

Patent metadata

Field	Value
Publication number	US-11450496-B2
Application number	US-202017012065-A
Country	US
Kind code	B2
Filing date	Sep 4, 2020
Priority date	Sep 13, 2019
Publication date	Sep 20, 2022
Grant date	Sep 20, 2022

Abstract

A relay includes a fixed terminal, a movable contact piece, a holder, a drive shaft, a contact case, a magnetic field generation member, and an inner member. The drive shaft is connected to the holder on a side close to the first end of the drive shaft. The magnetic field generation member is arranged around the contact case and is configured to generate a magnetic field in which an arc generated between the fixed contact and the movable contact extends in a lateral direction of the movable contact piece. The inner member includes a rotation preventing portion for restricting rotation of the holder around the drive shaft. The rotation preventing portion is arranged so as to contact the holder at a position closer to a second end of the drive shaft than the movable contact piece and closer to the drive shaft than the movable contact.

First claim

The invention claimed is:

1. A relay comprising:
a fixed terminal including a fixed contact;
a movable contact piece including a movable contact arranged to face the fixed contact, the movable contact piece being configured to move in a moving direction including a first direction in which the movable contact comes into contact with the fixed contact and a second direction in which the movable contact separates from the fixed contact;
a holder that holds the movable contact piece;
a drive shaft including a first end and a second end opposite to the first end, the drive shaft extending in the moving direction of the movable contact piece, the drive shaft being connected to the holder on a side close to the first end of the drive shaft;
a contact case that accommodates the fixed contact, the movable contact piece, and the holder;
a magnetic field generation member arranged around the contact case, the magnetic field generation member being configured to generate a magnetic field in which an arc generated between the fixed contact and the movable contact extends in a lateral direction of the movable contact piece; and
an inner member that is a separate body from the contact case and that includes a rotation preventing portion for restricting rotation of the holder around the drive shaft, the rotation preventing portion being arranged so as to contact the holder at a position closer to the second end of the drive shaft than the movable contact piece and closer to the drive shaft than the movable contact, wherein
the holder includes a plurality of contact portions configured to contact the rotation preventing portion, and
the plurality of contact portions are arranged to face the rotation preventing portion in a longitudinal direction orthogonal to the lateral direction of the movable contact piece.

2. The relay according to claim 1 , wherein
the contact case has an opening that opens toward the second end of the drive shaft,
the inner member further includes a base portion arranged to cover the opening of the contact case, and
the rotation preventing portion projects from the base portion toward the movable contact piece.

3. The relay according to claim 2 , wherein
the inner member further includes a tubular portion extending from the base portion in the moving direction and into which the drive shaft is inserted.

4. The relay according to claim 1 , wherein
the plurality of contact portions and the rotation preventing portion extend parallel to the lateral direction of the movable contact piece.

5. The relay according to claim 4 , wherein
the plurality of contact portions are arranged without overlapping the movable contact piece in the moving direction of the movable contact piece.

6. The relay according to claim 1 , wherein
the holder includes a pedestal portion on which the movable contact piece is placed, a leg portion extending from both ends of the pedestal portion in the lateral direction of the movable contact piece toward the second end of the drive shaft, and a pair of clamping portions clamping the movable contact piece, the pair of the clamping portions being formed by bending a part of the leg portion toward the first end of the drive shaft.

7. The relay according to claim 1 , wherein
at least a part of the inner member is formed of an insulating material.

8. The relay according to claim 1 , wherein
the plurality of contact portions and the rotation preventing portion are made of a metal member.

Assignees

• Omron Tateisi Electronics Co

Inventors

• Harimochi Hiroyuki
• Minowa Ryota
• Kawaguchi Naoki
• Ogawa Shinichi
• Otsuka Kohei
• Iwasaka Hiroyuki
• Tsutsui Kazuhiro

Classifications

• H01H51/065

  Relays having a pair of normally open contacts rigidly fixed to a magnetic core movable along the axis of a solenoid, e.g. relays for starting automobiles (details H01H50/20) · CPC title

• H01H50/04 Primary

  Mounting complete relay or separate parts of relay on a base or inside a case · CPC title

• H01H50/54

  Contact arrangements · CPC title

• H01H50/60

  moving contact being rigidly combined with movable part of magnetic circuit {(for polarised relays H01H51/2254, H01H51/2281)} · CPC title

• H01H1/34

  with provision for adjusting position of contact relative to its co-operating contact · CPC title