Patent ID: 6707189
Filing Date: 2004-03-16
Classification: H02K

Abstract:
An image pickup apparatus comprising:an image pickup device for photographing a subject; and a driving device for driving the image pickup device in a circumferential angle direction and an elevation angle direction, wherein said driving device includes a first driving device which drives said image pickup device in the circumferential angle direction, and a second driving device which drives said image pickup device in the elevation angle direction, and each of said first driving device and said second driving device constitutes a permanent magnet motor including a planetary reduction gear, wherein said permanent magnet motor includes: a stator having a winding; a rotor which has a permanent magnet, and rotates by passing a current through said winding; a rotation shaft which is formed integrally with the rotor, and has a driving gear formed on an outer periphery thereof; a planetary gear which is disposed so as to be rotatable around an axis center line of the rotation shaft and meshes with said driving gear, and which is disposed so as to be rotatable on an axis center line extending in parallel to an axial direction of said rotation shaft, a fixed internal gear which is disposed coaxially with said rotation shaft, fixed to said stator, and meshes with said planetary gear in an inner periphery thereof; a rotary internal gear which is disposed coaxially with said rotation shaft, disposed so as to be freely rotatable around said axis center line, meshes with said planetary gear in the inner periphery thereof and has the number of teeth different from the number of teeth of said fixed internal gear; and a driving shaft which rotates integrally with the rotary internal gear.