| 摘要 |
PROBLEM TO BE SOLVED: To eliminate anxiety about the damage to connection parts of electronic parts mounted on a driving circuit board by cable puttingin/out work or the like to a connector, and eliminate a fixing screw serving as a means for fastening the driving circuit board to a venturi in a brushless DC fan with a driving part integrally built therein. SOLUTION: A motor driving part is composed of a driving circuit board 4 mounted with specified electronic parts 6 and also one end of a relay connector 5 of a feeder cable 8 connected to an external power source. A plurality of recessed parts are provided at the outer peripheral edge of the driving circuit board 4 at least partially having a circular arc face, near a part connected to this circular arc face and mounted with the connector 5. The small diameter cylindrical part inner peripheral surface l-21 of a venturi l corresponding to the recessed parts is provided with a pair of small protrusions l-3 axially displaced and provided with a space sufticient to hold the driving circuit board 4. The outer peripheral edge of the driving circuit board 4 is fitted into this clearance and rotated to fix and hold the driving circuit board 4. |
