Solenoid control apparatus

摘要

A solenoid control apparatus includes a resin housing having a solenoid mounting portion, a connector portion, and a circuit board mounting portion in which a circuit board is mounted. Terminals extending from the solenoid mounting portion and the connector portion are soldered to the electrical circuit on the circuit board. The circuit board has a reduced-rigidity portion in its area corresponding to a portion of the resin housing through which the connector portion is connected to the solenoid mounting portion. The reduced-rigidity portion is formed by reducing the amount of material forming the circuit board per unit area, and is more easily deformable than the remaining portion of the circuit board. When the connector portion is thermally deformed, the circuit board is also easily deformable about the reduced-rigidity portion. This reduces stress on the soldered portions.

主权项

1. A solenoid control apparatus comprising:
a housing made of resin and including a solenoid mounting portion, an overhanging connector portion having terminals and integrally connected to one side of the solenoid mounting portion though a connecting portion, and a circuit board mounting portion provided over an area from the solenoid mounting portion to the connector portion so as to be adjacent to the solenoid mounting portion and the connector portion; a circuit board having a electronic control circuit and mounted in the circuit board mounting portion so as to be supported by supported by the housing, and connector portion extending in a direction of one surface of the circuit board; solenoid coils having terminals and mounted in the solenoid mounting portion; wherein the terminals of the connector portion and the terminals of the solenoid coils extend through the circuit board and are joined to the electrical control circuit on the circuit board; wherein the circuit board has a reduced-rigidity portion formed in an area of the circuit board corresponding to the connecting portion of the housing, the reduced-rigidity portion being formed by reducing the amount of the material forming the circuit board; and wherein the reduced-rigidity portion comprises a plurality of through holes extending through the circuit board and spaced apart by predetermined distances from each other, and wherein the solenoid control apparatus further comprises a heat dissipating member having heat absorbing protrusions press-fitted in the respective through holes of the circuit board for dissipating heat generated in the circuit board.