| 主权项 |
1. An electromagnetic relay for starting a motor of a starter, the electromagnetic relay comprising:
a resistor to reduce an activation current that flows through the motor from a battery for activation of the motor; a relay contact that causes the starting current to flow while bypassing the resistor; a relay coil that forms an electromagnet when excited by energization; a control circuit that controls an excited state of the relay coil for activation of the motor to open or close the relay contact, thus controlling energization of the motor from the battery via the resistor; a case having a bottom portion at one end thereof in an axial direction of the relay coil, and an opening portion that is open at the other end in the axial direction, the relay coil being accommodated in the case; a movable core movable, inside of the relay coil, in the axial direction of the relay coil; a fixed core arranged in the axial direction of the relay coil to be opposite to the movable core; a first partitioning wall member and a second partitioning wall member, the first partitioning wall member and the second partitioning wall member being arranged at the one end of the relay coil and the other end of the relay coil, respectively, in the axial direction thereof, each of the first partitioning wall member and the second partitioning wall member forming a part of a magnetic circuit; a resin cover that is fixed to the case and closes the opening portion of the case; a first stationary contact of the relay contact located in a contact chamber that is an inner space of the cover, the contact chamber being formed at an anti-coil side relative to the second partitioning wall member, the first stationary contact being connected with the battery via a first external connection terminal fixed to the cover; a second stationary contact of the relay contact located in the contact chamber and connected with the motor via a second external connection terminal fixed to the cover; and a movable contact movable in an axial direction of the relay coil in the contact chamber with motion of the movable core, wherein
the resistor is electrically connected between the first external connection terminal and the second external connection terminal in the contact chamber;the relay contact is closed when the movable contact abuts onto the first stationary contact and the second stationary contact so that both the first stationary contact and the second stationary contact are electrically conducted via the movable contact, and the relay contact is opened when the movable contact is separated from the first stationary contact and the second stationary contact;the control circuit includes an IC;the IC and the resistor are incorporated in the electromagnetic relay;the IC includes a package that protects circuit elements contained in the IC;the package is attached to be closely adjacent to any one of the first partitioning wall member and the second partitioning wall member, each of the first partitioning wall member and the second partitioning wall member being made of a metal member; andthe relay contact of the electromagnetic relay has a normally-closed contact structure in which the movable contact abuts onto the first stationary contact and the second stationary contact with the relay coil deenergized so that the relay contact is closed. |
