Image pickup apparatus and driving apparatus

• US 20020145346A1
• Filed: 04/08/2002
• Published: 10/10/2002
• Est. Priority Date: 04/09/2001
• Status: Active Grant

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Ito, Tetsuya, Ito, Kenichi
• Granted Patent: US 6,707,189 B2
• Time in Patent Office: Days
• US Class Current: 310/75R
• CPC Class Codes: H02K 7/10 Structural association with clutches, brakes, gears, pulleys or mechanical starters

Abstract

An image pickup apparatus comprise a camera unit for photographing a subject and a driving device for driving the camera unit in a circumferential angle direction and an elevation angle direction, wherein the driving device includes a motor which drives the camera unit in the circumferential angle direction, and a motor which drives the camera unit in the elevation angle direction, and each of the motor and the motor is constituted of a permanent magnet motor including a planetary reduction gear.

Claims

1. 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 is constituted of a permanent magnet motor including a planetary reduction gear.

2. The image pickup apparatus according to claim 1, wherein said permanent magnet motor includes a hollow portion present inside a driving shaft which outputs a driving force, and a wiring connected to said image pickup device through the hollow portion.

3. The image pickup apparatus according to claim 1, wherein said permanent magnet motor includes a conductive member disposed on said driving shaft, and a conducting member which is connected to the conductive member and secures conduction of electricity to the outside from said first driving device or said second driving device.

4. The image pickup apparatus according to claim 2, wherein said permanent magnet motor includes:

a conductive member disposed on said driving shaft; and

a conducting member which is connected to the conductive member and secures conduction of electricity to the outside from said first driving device or said second driving device.

5. The image pickup apparatus according to claim 1, 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.

6. The image pickup apparatus according to claim 2, 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.

7. The image pickup apparatus according to claim 3, 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.

8. The image pickup apparatus according to claim 4, 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.

9. The image pickup apparatus according to claim 1, wherein said first driving device and said second driving device are constituted of permanent magnet motors having the same structure.

10. A driving apparatus comprising:

a driving device which drives an object in a peripheral angle direction and an elevation angle direction;

said driving device comprising;

a first driving device which drives said object in the circumferential angle direction; and

a second driving device which drives said object in the elevation angle direction,

said first driving device and said second driving device being constituted of permanent magnet motors including planetary reduction gears.

11. The driving apparatus according to claim 10, wherein said permanent magnet motor includes a hollow portion present inside a driving shaft which outputs a driving force, and a wiring connected to an image pickup device through the hollow portion.

12. The driving apparatus according to claim 10, wherein said permanent magnet motor includes a conductive member disposed on said driving shaft, and a conducting member which is connected to the conductive member and secures conduction of electricity to the outside from said first driving device or said second driving device.

13. The driving apparatus according to claim 11, wherein said permanent magnet motor includes a conductive member disposed on said driving shaft, and a conducting member which is connected to the conductive member and secures conduction of electricity to the outside from said first driving device or said second driving device.

14. The driving apparatus according to claim 10, 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.

15. The driving apparatus according to claim 11, 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.

16. The driving apparatus according to claim 12, 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.

17. The driving apparatus according to claim 13, 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.

18. The driving apparatus according to claim 10, wherein said first driving device and said second driving device are constituted of permanent magnet motors having the same structure.