Patent ID: 7075780

Claim:
A support structure of a control board comprising: a control board including a plurality of attaching holes disposed at respective corners of an imaginary polygon; a support member made of a synthetic resin for supporting the control board; a plurality of support bosses disposed on the support member in correspondence with the respective attaching holes, the plurality of support bosses each having a support portion in contact with one face of the control board, and an engaging portion inserted into the respective attaching hole and engaged with another face of the control board; and each of the support bosses being integrally formed with the support member and allowing for expansion and contraction movement of the control board relative to the support member, wherein each of the engaging portions is formed with a split groove in a shape of a straight line opened at a front end thereof, each split groove is arranged between engaging members, and the respective support bosses are provided at the support member by avoiding alignment between at least two of the split grooves of the support bosses disposed at two ends of straight lines connecting corners of the imaginary polygon, and wherein the split grooves are arranged so as not to be parallel to each other.