Electromagnetic relay and method of manufacturing electromagnetic relay

A method of manufacturing an electromagnetic relay, comprising the steps of:

• preparing a drive unit in which a magnetizing coil which forms a magnetic field by energization, a fixed core which is placed on a side of an inner diameter of the magnetizing coil, a yoke which accommodates the magnetizing coil and the fixed core, a movable core which is movable relative to the fixed core, a shaft which is able to reciprocate in an axial direction and is fixed to the movable core and a return spring which urges the movable core in a direction away from the fixed core are assembled;
• preparing a relay unit in which a frame made of an insulating material, a fixed terminal fixed to the frame, a movable element which is provided on a side opposite to the movable core with respect to the fixed terminal and is movable relative to the fixed terminal, and a contact pressure spring which urges the movable element to a side to the fixed terminal are assembled;
• fixing the drive unit and the relay unit by adjusting a press-fitting amount of a claw portion provided on one of the yoke or the frame and a recess portion provided on the other one so that a gap between an end of the shaft and the movable element is adjusted to have a predetermined size in a state where a movable contact included in the movable element and a fixed contact included in the fixed terminal are brought into contact with each other and a movable component and the fixed core are brought into contact with each other;
• fixing a sealing member and an external connection terminal in a state where the external connection terminal is inserted through a hole of the sealing member in a plate shape;
• joining the external connection terminal and the fixed terminal while arranging the sealing member to which the external connection terminal is fixed on an outside of the relay unit and the drive unit;
• forming a sealed space inside an inner cover and the sealing member by joining an inner cover in which the drive unit and the relay unit are accommodated therein and the sealing member;
• and
• sealing an arc-extinguishing gas in the sealed space formed inside the inner cover and the sealing member.