Method and system for adjusting an electromagnetic relay

A method for adjusting an electromagnetic relay, the electromagnetic relay comprising a solenoid formed from a wound coil, a movable contact-point block having a movable iron core, an insulation holder integrated with the upper end portion of the movable iron core and a movable contact piece which is biased toward and supported by the insulation holder through a contact pressing spring, a secondary yoke secured to the upper end surface of the solenoid, and a fixed iron core secured to a yoke, the method comprising:

• inserting a restoring spring into an axial hole of the solenoid,
• slidably inserting the movable iron core of the movable contact-point block into the axial hole of the solenoid from thereabove through a through hole in the secondary yoke,
• inserting the fixed iron core into the axial hole from therebelow,
• adapting the movable iron core to slide into the axial hole based on the magnetization force and the demagnetization of the coil to move the movable contact-point block back and forth, effecting contacting and separating of a movable contact point provided on the movable contact piece with and from a fixed contact point,
• pushing the movable contact-point block to bring the movable contact point provided on the movable contact piece into contact with the fixed contact point,
• pushing the movable contact-point block in by an amount corresponding to a predetermined amount of contact-point follow against the spring force of the contact pressing spring,
• pushing the fixed iron core in until the fixed iron core comes into contact with the movable iron core against the spring force of the restoring spring to position the yoke on the secondary yoke, and
• securing the secondary yoke and the yoke to and integrated with each other.

A method for adjusting an electromagnetic relay, the electromagnetic relay comprising:

• a solenoid formed from a wound coil, a movable contact-point block having a movable iron core, an insulation holder integrated with the upper end portion of the movable iron core and a movable contact piece which is biased toward and supported by the insulation holder through a contact pressing spring, a secondary yoke secured to the upper end surface of the solenoid, and a fixed iron core secured to a yoke, the method comprising:
• inserting a restoring spring into an axial hole of the solenoid,
• slidably inserting the movable iron core of the movable contact-point block into the axial hole of the solenoid from thereabove through a through hole in the secondary yoke,
• inserting the fixed iron core into the axial hole from therebelow,
• adapting the movable iron core to slide into the axial hole based on the magnetization force and the demagnetization of the coil to move the movable contact-point block back and forth, effecting contacting and separating of a movable contact point provided on the movable contact piece with and from a fixed contact point,
• pushing the fixed iron core in until the fixed iron core comes into contact with the movable iron core against the spring force of the restoring spring,
• pushing the movable contact-point block to bring the movable contact point provided on the movable contact piece into contact with the fixed contact point,
• pushing the movable contact-point block in by an amount corresponding to a predetermined amount of contact-point follow against the spring force of the contact pressing spring for positioning the yoke on the secondary yoke, and
• securing the secondary yoke and the yoke to and integrated with each other.