PURPOSE: To enlarge the allowable range of fastening torque at the time of fastening a screw, facilitate torque management, and surely fix a printed board to a frame, by forming a plurality of through holes in a region around a screw insertion hole of the printed board which region is pressed by the screw.
CONSTITUTION: A screw 50 is inserted into a screw insertion hole 20, and fastened to a screw hole of a frame 60, thereby fixing a printed board 10 to the frame 60. Around the screw insertion hole 20, a plurality of through holes 30 are formed at equal intervals, on the concentric circle of the screw insertion hole 20. These through holes 30 are arranged in a fastening part 14. Thereby the allowable range of fastening torque at the time of fastening the screw 50 is enlarged, torque management is facilitated, and sure fixing is enabled, when the printed board 10 is fixed to a specified portion of the printed board 10 by using the screw 50.
ABE HIDEFUMI
KONNO TAKESHI
SATO KAZUNORI
