The present invention relates to a magnetic switch, and more particularly, to a magnetic switch provided with a permanent magnet disposed at an outside of an upper frame and an externally fitted permanent magnet holder to reduce a number of components and facilitate maintenance.

A base of a relay has a leg extending in a contact/separation direction between contacts, and the leg is configured to come into contact with a yoke when the base is incorporated into a case. The leg is spaced away from an upper part of an armature by a distance. This distance is determined so that an upper surface of the armature does not come into contact with the leg in a normal operation of the armature, but the upper surface of the armature comes into contact with a lower surface of the leg when the armature jumps up beyond a movable range thereof due to, for example, a strong impact applied to a vehicle on which the relay is mounted.

A relay of the present disclosure includes an insulation cover, a first yoke plate, a contact assembly, a driving assembly and a pressure relief valve assembly. The first yoke plate is connected with the insulation cover and encloses a contact chamber with the insulation cover. The first yoke plate is provided with a pressure relief hole. The driving assembly is connected with the movable contact piece and configured to drive the movable contact piece move. The pressure relief valve assembly is arranged on the first yoke plate and configured to close the pressure relief hole when a gas pressure in the contact chamber is less than a threshold and configured to be broken to open the pressure relief hole when the gas pressure in the contact chamber is greater than or equal to the threshold.

A base of a relay has a leg extending in a contact/separation direction between contacts, and the leg is configured to come into contact with a yoke when the base is incorporated into a case. The leg is spaced away from an upper part of an armature by a distance. This distance is determined so that an upper surface of the armature does not come into contact with the leg in a normal operation of the armature, but the upper surface of the armature comes into contact with a lower surface of the leg when the armature jumps up beyond a movable range thereof due to, for example, a strong impact applied to a vehicle on which the relay is mounted.

A relay of the present disclosure includes an insulation cover, a first yoke plate, a contact assembly, a driving assembly and a pressure relief valve assembly. The first yoke plate is connected with the insulation cover and encloses a contact chamber with the insulation cover. The first yoke plate is provided with a pressure relief hole. The driving assembly is connected with the movable contact piece and configured to drive the movable contact piece move. The pressure relief valve assembly is arranged on the first yoke plate and configured to close the pressure relief hole when a gas pressure in the contact chamber is less than a threshold and configured to be broken to open the pressure relief hole when the gas pressure in the contact chamber is greater than or equal to the threshold.