| 摘要 |
PURPOSE:To miniaturize the mechanism and make it as lightweight as possible in a simple constitution and to enhance the adaptability by providing a flat portion without pole teeth in the middle of the pole teeth row width of a stator, and by providing the rolling wheel between moving pieces abutting to the flat portion. CONSTITUTION:In the middle of the pole teeth row width of a stator 2 a flat portion 15 without pole teeth is provided along the progressive direction of a moving piece 1. Furthermore, a rolling wheel 17 abutted to this flat portion 15 is provided between the needle 1 facing the flat portion 15. The rolling wheel 17 rolls on the flat portion 17 provided between the pole teeth rows 10-1 and 10-2 and moves the moving piece 1 in parallel to the stator 2, keeping the clearance of pole teeth between the moving piece 1 and the stator 2.
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