| 摘要 |
A stepping motor prevent separation of a thrust holder by coupling an elastic member with the housing when pressing the elastic member to the thrust holder and prevents damage to components by elastically supporting the thrust holder. One side of a housing(120) is combined in one side board of a bracket(110). A thrust holder(144) is installed inside the other side surface of the housing. A stator includes one or more bobbins(131) installed inside the housing, the coil(138) wound around an outer circumference of bobbin, and a tooth yoke(134) combined and inserted into an inner circumference of the bobbin. One end and other end of a lead screw(150) are supported in the other side board of the bracket and the thrust holder and installed to rotate forward and backward. A rotor has a magnet(160) which is fixed at an outer circumference of one end of the lead screw and rotates the lead screw forward and backward while rotating by operating with the stator. An elastic member(170) is coupled with other side surface of the housing and prevents the thrust holder from being separated to the other side surface of the housing, and elastically supports the lead screw to the other side board of the bracket.
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