Patent ID: 9172286
Filing Date: 2015-10-27
Classification: H02K

Abstract:
1. A leveling motor for adjusting an irradiation angle of a lamp, comprising: a housing; a magnet coupled with a coil and disposed within the housing for generating an electromagnetic force; a shaft moving in the housing in an axial direction and having a threaded portion formed on a predetermined portion of an outer circumference of the shaft and a ball coupled at a first end the shaft; a threaded pipe disposed to surround the outer circumference of the shaft, and having a grooved portion on an inner circumference of the threaded pipe wherein the grooved portion is engaged with the threaded portion of the shaft, and wherein the threaded pipe is configured to rotate the threaded portion of the shaft by the electromagnetic force; and an elastic member disposed between a second end of the shaft and an inner surface of the housing, wherein the elastic member comprises a coil spring for providing an elastic force toward the second end of the shaft, wherein the threaded portion of the shaft comes into close contact with the grooved portion of the threaded pipe to inhibit a backlash present therebetween.