Positioning device for a sensor element of a miniature fan

摘要

A positioning device includes an axle tube (10) for engaging with a circuit board (1) and a stator (2). The circuit board (1) includes control elements (11) and a sensor element (12) thereon. Each pole of the stator includes two pole ends (21,22). A gap (23) exists between two adjacent pole ends respectively of two adjacent poles. The gap (23) receives the sensor element (12) or provides a positioning reference for the sensor element.