US 2010/0060394 A1Published application

Electromagnetic relay

AssigneeAnden Co., Ltd.

InventorsHiroshi Nagura, Takashi Ito, Masaki Takeyama

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Abstract

An electromagnetic relay includes a case, a base, a magnet coil, a movable member driven by electromagnetic force of the coil, a moving contact, a fixed contact engaged with or disengaged from the moving contact, a fixed contact holding member fixed to the base with the holding member passing therethrough and having a load circuit terminal, and a magnet applying Lorentz force to arc generated between the fixed contact and the moving contact. The case includes a guide part on its region with which arc extended in a Lorentz force application direction collides. The guide part guides arc after the collision to extend arc in a different direction from the application direction. The case includes a case partition wall between the guide part and the base. The holding member has a guide part opposing portion opposed to the guide part. The opposing portion is covered with the case partition wall.

Claims6

Dependent claims

An electromagnetic relay comprising:

a fixed contact;
a fixed contact holding member, wherein the fixed contact is attached on one end side portion of the fixed contact holding member so as to be positioned and held at a predetermined position;
a magnet coil configured to generate electromagnetic force when energized;
a movable member driven by the electromagnetic force of the magnet coil;
a moving contact attached on one end side portion of the movable member so as to be engaged with or disengaged from the fixed contact as a result of whether the movable member is driven or not;
and
a magnet disposed on a lateral side of the fixed contact and the moving contact so as to apply Lorentz force to arc which is generated between the fixed contact and the moving contact, wherein:
given that:
a contact alignment direction is a direction of a line passing through a center of the fixed contact and a center of the moving contact;
a magnet arrangement direction is a direction of a line which is perpendicular to the contact alignment direction and which passes through the magnet;
and
a Lorentz force application direction is a direction of the Lorentz force applied to the arc in a region in which the fixed contact and the moving contact are opposed to each other,
an end face of the fixed contact holding member at the one end side portion thereof is opposed to the magnet;
at least the one end side portion of the fixed contact holding member extends in a direction away from the magnet along the magnet arrangement direction;
an end face of the movable member at the one end side portion thereof is opposed to the magnet;
at least the one end side portion of the movable member extends in a direction away from the magnet along the magnet arrangement direction;
the Lorentz force application direction is perpendicular to the contact alignment direction and the magnet arrangement direction;
and
an end portion of the magnet on a side of the Lorentz force application direction extends further in the Lorentz force application direction than a side surface of the fixed contact holding member at the one end side portion thereof on a side of the Lorentz force application direction and a side surface of the movable member at the one end side portion thereof on a side of the Lorentz force application direction.

16 more elements

An electromagnetic relay comprising:

a cylindrical case having a bottom portion;
a plate-like base disposed to close an opening of the case;
a magnet coil that is disposed in an internal space defined by the case and the base and that is configured to generate electromagnetic force when energized;
a movable member disposed in the internal space and driven by the electromagnetic force of the magnet coil;
a moving contact attached on one end side portion of the movable member;
a fixed contact that is disposed in the internal space and that is engaged with or disengaged from the moving contact as a result of whether the movable member is driven or not;
a fixed contact holding member that is fixed to the base with the fixed contact holding member passing through the base and that has a load circuit terminal, which projects into an exterior space and is connected to an external harness, wherein the fixed contact is attached on one end side portion of the fixed contact holding member in the internal space;
and
a magnet disposed on a lateral side of the fixed contact and the moving contact so as to apply Lorentz force to arc which is generated between the fixed contact and the moving contact, wherein:
given that a Lorentz force application direction is a direction of the Lorentz force applied to the arc in a region in which the fixed contact and the moving contact are opposed to each other,
the case includes a guide part on a region of the case with which the arc extended in the Lorentz force application direction collides;
the guide part is formed to guide the arc after the collision so as to extend the arc in a different direction from the Lorentz force application direction;
the case further includes a case partition wall between the guide part and the base;
the fixed contact holding member has a guide part opposing portion opposed to the guide part;
and
the guide part opposing portion is covered with the case partition wall.

13 more elements

Dependencies are inferred from the claim text.