Direct current relay and manufacturing method therefor

A Direct Current (DC) relay comprising:

• a fixed contactor;
• a movable contactor brought into contact with or separated from the fixed contactor to be electrically connected to or disconnected from the fixed contactor;
• a lower yoke located on a lower side of the movable contactor to cancel electromagnetic repulsive force generated between the fixed contactor and the movable contactor,
• wherein a coupling protrusion having a predetermined diameter protrudes from the lower side of the movable contactor,
• wherein a movable contactor coupling portion having a larger diameter than the coupling protrusion is recessed by a predetermined distance into an upper side of the lower yoke,
• wherein the coupling protrusion is expanded radially outward to be fitted to the movable contactor coupling portion when radially outward pressure is applied after the coupling protrusion is inserted into the movable contactor coupling portion,
• wherein the coupling protrusion is formed coaxially with a central portion of the movable contactor,
• the DC relay further comprising an upper yoke located on an upper side of the movable contactor to cancel electromagnetic repulsive force generated between the fixed contactor and the movable contactor,
• wherein electromagnetic attractive force is generated between the upper yoke and the lower yoke when the fixed contactor and the movable contactor are in contact to be electrically connected to each other,
• the DC relay further comprising a housing located between the movable contactor and the upper yoke,
• wherein the housing is provided with a housing through hole formed therethrough in a height direction,
• wherein the upper yoke is provided with an upper yoke through hole formed therethrough in the height direction,
• wherein the housing through hole has a larger diameter than the upper yoke through hole, and
• wherein the housing through hole and the upper yoke through hole are disposed to have the same central axis.

A Direct Current (DC) relay comprising:

• a fixed contactor;
• a movable contactor brought into contact with or separated from the fixed contactor to be electrically connected to or disconnected from the fixed contactor;
• a lower yoke located on a lower side of the movable contactor to cancel electromagnetic repulsive force generated between the fixed contactor and the movable contactor,
• wherein a coupling protrusion having a predetermined diameter protrudes from the lower side of the movable contactor,
• wherein a movable contactor coupling portion having a larger diameter than the coupling protrusion is recessed by a predetermined distance into an upper side of the lower yoke,
• wherein the coupling protrusion is expanded radially outward to be fitted to the movable contactor coupling portion when radially outward pressure is applied after the coupling protrusion is inserted into the movable contactor coupling portion,
• wherein the coupling protrusion is formed coaxially with a central portion of the movable contactor,
• the DC relay further comprising an upper yoke located on an upper side of the movable contactor to cancel electromagnetic repulsive force generated between the fixed contactor and the movable contactor,
• wherein electromagnetic attractive force is generated between the upper yoke and the lower yoke when the fixed contactor and the movable contactor are in contact to be electrically connected to each other,
• the DC relay further comprising a housing located between the movable contactor and the upper yoke,
• the DC relay further comprising a housing to cover the upper yoke,
• wherein the upper yoke is located between the movable contactor and the housing.

A method for manufacturing a direct current (DC) relay, the method comprising:

• (a) coupling an upper yoke and a housing to each other;
• (b) coupling a support member having a first hollow portion and a second hollow portion through the upper yoke and the housing;
• and
• (c) expanding the support member radially outward by applying radially outward pressure to the support member.