| 摘要 |
A stepping motor is provided to reduce assembly tolerance by removing a process for coupling a tooth yoke with a side of a bobbin facing a side plate of a bracket. A metallic bracket(110) includes a supporting plate(111), a first side plate(113) having a through-hole, a second side plate(115), and a plurality of teeth(117) formed in a predetermined interval on an inner circumference of the through-hole. A housing(120) includes both of open sides. A plurality of teeth(121) are formed in a predetermined interval on one side of the housing. The other side of the housing is coupled with the first side plate. A first stator is installed in the inside of the housing. The first stator includes a first bobbin for receiving the teeth of the housing, a first coil wound around an outer circumference of the first bobbin, and a first tooth yoke coupled with an inner circumference of the other side of the first bobbin. A second stator is installed in the inside of the housing. The second stator includes a second bobbin for receiving the teeth of the bracket, a second coil wound around an outer circumference of the second bobbin, and a second tooth yoke coupled with an inner circumference of the other side of the second bobbin. An end cover(130) is coupled with one side of the housing. One end or the other end of a lead screw(170) is supported by an end cover side and a second bracket side in order to be rotated forwardly. A magnet is fixed to an outer circumference of one end of the lead screw and is operated with the first stator and the second stator.
|
