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CN-115588600-B - Electromagnetic relay

CN115588600BCN 115588600 BCN115588600 BCN 115588600BCN-115588600-B

Abstract

The invention can restrain the increase of manufacturing cost and expand the space for extinguishing arc in electromagnetic relay. An electromagnetic relay includes a base, a fixed terminal, a fixed contact, a movable piece, a movable contact, a magnet, a base holder, and a housing. The fixed terminal is supported by the base. The fixed contact is connected with the fixed terminal. The movable piece is supported by the base. The movable contact is connected to the movable piece and faces the fixed contact. The magnet applies lorentz force to an arc generated between the fixed contact and the movable contact. The base support is independent of the base. The base support is mounted on the base. The base support is disposed at least in a direction in which the lorentz force acts with respect to the base. The shell is mounted on the base support.

Inventors

  • MURATA KEISUKE
  • Kitagawa Dachiro

Assignees

  • 欧姆龙株式会社

Dates

Publication Date
20260505
Application Date
20220621
Priority Date
20210705

Claims (8)

  1. 1. An electromagnetic relay is characterized by comprising: A base; A fixed terminal supported by the base; A fixed contact connected to the fixed terminal; a movable piece supported by the base; a movable contact connected to the movable piece and facing the fixed contact, and movable in a forward-backward direction to contact with or separate from the fixed contact; a magnet that applies a lorentz force to an arc generated between the fixed contact and the movable contact, the lorentz force being applied in a left-right direction; A base support which is independent from the base, is mounted on the base, and is arranged at least in a direction in which the Lorentz force acts, that is, at least in a left-right direction of the base, with respect to the base, and A housing mounted to the base bracket; the direction in which the movable contact contacts the fixed contact is defined as the front, The direction in which the movable contact moves away from the fixed contact is defined as the rear, The base bracket includes: A front bracket portion disposed in front of the base; A rear bracket portion disposed behind the base; A left bracket part arranged at the left side of the base, and And a right bracket portion disposed on the right side of the base.
  2. 2. The electromagnetic relay according to claim 1, wherein, The magnet is disposed above the fixed contact and the movable contact.
  3. 3. The electromagnetic relay according to claim 1, wherein, The base support includes an opening that, The base is disposed within the opening.
  4. 4. The electromagnetic relay according to claim 3, wherein, The base bracket includes: a bracket frame including the opening, and And a protruding portion protruding from the bracket frame into the opening and contacting the base from above.
  5. 5. The electromagnetic relay according to claim 3, wherein, The base bracket includes: a bracket frame including the opening, and And a protrusion protruding from the bracket frame into the opening and supporting the base from below.
  6. 6. The electromagnetic relay according to claim 1, wherein, The base bracket includes a stepped portion supporting the housing from below.
  7. 7. The electromagnetic relay according to claim 1, wherein, The housing includes a magnet housing portion disposed above the fixed contact and the movable contact, The magnet housing portion is partitioned from a space in the housing, The magnet is accommodated in the magnet accommodating portion.
  8. 8. The electromagnetic relay according to claim 7, wherein, The housing further includes a cover portion made of a soft magnetic material that closes off the magnet housing portion.

Description

Electromagnetic relay Technical Field The present invention relates to an electromagnetic relay. Background For example, as shown in patent document 1, an electromagnetic relay is provided with a fixed contact and a movable contact. By bringing the movable contact into contact with the fixed contact, current flows to the movable contact and the fixed contact. The power is interrupted between the movable contact and the fixed contact by moving the movable contact away from the fixed contact. The fixed contact is connected with the fixed terminal. The movable contact is connected to the movable piece. The fixed terminal and the movable piece are supported by the base. The housing is mounted on the base. On the other hand, there is an electromagnetic relay including a magnet for extinguishing an arc. The lorentz force acts on an arc generated between the fixed contact and the movable contact by a magnetic field from the magnet. The arc is elongated by the lorentz force, and thus extinguished rapidly. Patent document 1 Japanese patent application laid-open No. 2019-175603 Disclosure of Invention In order to extinguish the arc quickly, a large space is desired around the contacts. Thus, for example, by enlarging the base, a larger space is provided around the contacts. However, the base is a member for defining the positional relationship among the fixed terminal, the fixed contact, the movable piece, and the movable contact, and high dimensional accuracy is required. Thus, it is not easy to redesign the base. Also, if the shape of the base is changed, it is necessary to redesign the production line of the electromagnetic relay. In this case, the manufacturing cost increases. The purpose of the present invention is to expand the space for extinguishing an arc in an electromagnetic relay while suppressing an increase in manufacturing cost. An electromagnetic relay according to one embodiment of the present invention includes a base, a fixed terminal, a fixed contact, a movable piece, a movable contact, a magnet, a base holder, and a housing. The fixed terminal is supported by the base. The fixed contact is connected with the fixed terminal. The movable piece is supported by the base. The movable contact is connected to the movable piece and faces the fixed contact. The magnet applies lorentz force to an arc generated between the fixed contact and the movable contact. The base support is independent of the base. The base support is mounted on the base. The base support is disposed at least in a direction in which the lorentz force acts with respect to the base. The shell is mounted on the base support. In the electromagnetic relay according to the present aspect, the base holder is disposed at least in a direction in which the lorentz force acts on the base. Therefore, the space for extinguishing the arc is enlarged in the housing in the direction in which the lorentz force acts. And the base support is independent from the base. Therefore, the space for extinguishing the arc is enlarged without changing the shape of the base. This makes it possible to expand the space for extinguishing the arc while suppressing an increase in manufacturing cost. The magnet may be disposed above the fixed contact and the movable contact. In this case, the magnet can apply lorentz force to the arc without interfering with the operation of the movable piece. The movable contact may also be contacted with or separated from the fixed contact by moving in the front-rear direction. The lorentz force may also act in the left-right direction. The base support may be disposed at least in the left-right direction of the base. In this case, the space for extinguishing the arc is enlarged in the right-left direction in which the lorentz force acts in the case. The direction in which the movable contact contacts the fixed contact is defined as the front. The direction in which the movable contact moves away from the fixed contact is defined as the rear. The base bracket may also include a front bracket portion, a rear bracket portion, a left bracket portion, and a right bracket portion. The front bracket portion may be disposed in front of the base. The rear bracket portion may be disposed at the rear of the base. The left bracket portion may be disposed on the left side of the base. The right bracket portion may be disposed right of the base. In this case, the base holders are disposed in the front, rear, left, and right of the base. Thus, the base bracket is firmly mounted to the base. The base bracket may also include an opening. The base may also be disposed within the opening. In this case, the base bracket is easily attached to the base. The base bracket may also include a bracket frame and a boss. The bracket frame may also include an opening. The projection may also protrude from the bracket frame into the opening. The convex portion may be in contact with the base from above. In this case, the protrusion prevents the upward escape of