CIRCUIT BOARD UNIT

PROBLEM TO BE SOLVED: To provide a circuit board unit that enables reduction in the stress of the board on solder, electrical connection, and the like, and prevent it from causing nonconformities. SOLUTION: The circuit board unit includes: a cut portion 21a and a screw receiving portion 22 of a peripheral sidewall portion 21, provided at least along the direction of the length of a circuit board; and screw cramp portions 32 so provided that they are paired with the cut portion 21a and screw receiving portion 22 of the peripheral sidewall portion 21. The wall face portion 21b of the cut portion 21a of the peripheral sidewall portion 21 and the flared portions 32a of the screw cramp portions 32 face each other planarly, with parts thereof away from each other, in the direction of the length of the circuit board 4; and they are set separating from each other, when they are supported horizontally, and are also brought into contact with each other, in a supported state in which deflection is produced. COPYRIGHT: (C)2010,JPO&INPIT