| 摘要 |
PURPOSE:To make it unnecessary to provide lead wires by a method wherein an outer printed board which is fixed to housing is connected to an inner printed board which is incorporated by a rotor with a flexible printed board which is provided around a shaft. CONSTITUTION:An inner printed board 4 on which a position detection device 5 is provided is fixed to the large diameter part 1c of a shaft 1. On the other hand, an outer printed board 14 is fixed to the recess 2a of the lower surface of a housing 2. A driving circuit is provided on the outer printed board 14. The inner printed board 4 is connected to the driving circuit with a flexible printed board 12 which is provided around the shaft 1. With this constitution, it is not necessary to provide lead wires inside a rotor and an inefficient process wherein the lead wires are inserted into the shaft at the time of assembly can be eliminated Moreover, as the lead wires do not touch the shaft, failures which are caused by damages of the coverings of the lead wires and cuttings of the lead wires themselves can be avoided. |
