| 摘要 |
<p>An upper cover (15) is provided with a step (15f) on the periphery of a supporting section (15d) which supports a rotating shaft (17), for placing a circuit board (16), and on an inner plane of the supporting section (15d), a recessed section wherein a part of a rotor (11) enters is formed. Furthermore, through holes (14a, 14b), which are relief holes wherein lower portions and upper portions of coils (13a, 13b) enter, and through holes (15a, 15b) are formed on a lower cover (14) and the upper cover (15), respectively. Thus, size reduction of the rotating shaft (17) in the shaft direction is achieved. An adhesive layer (20) composed of an adhesive used for adhering a circuit board (16) on the upper cover (15) is provided on portions covering the through holes (15a, 15b) on the circuit board (16). Foreign materials entering from the through holes (14a, 14b) on the lower cover (14) and a space between the lower cover (14) and the upper cover (15) are adhered on an adhesive surface by the adhesive on the surface of the adhesive layer (20). ® KIPO & WIPO 2008</p> |
