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Motorized roller

Imported: 24 Feb '17 | Published: 06 Jan '04

Tatsuhiko Nakamura, Tomoyuki Fujimoto, Masaki Tanaka

USPTO - Utility Patents

Abstract

By housing a driver circuit board in a motorized roller having a built-in electric motor, the troublesome external wiring can be dispensed with, thereby facilitating the mounting of the roller on other apparatus. The heat generating inside the roller from a driver circuit board in the roller is dissipated by a heat releaser, thus protecting the devices from damage and avoiding failure of control.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of the motorized roller of an embodiment of this invention;

FIG. 2 is an exploded perspective view of the motorized roller illustrated in FIG. 1;

FIG. 3 is a perspective view of the unit for the motorized roller illustrated in FIG. 1;

FIG. 4 is a sectional view of the unit for the motorized roller illustrated in FIG. 1;

FIG. 5 is a cross-sectional view of the unit taken along line A—A of FIG. 4;

FIG. 6 is a perspective view of the motor driver assembly illustrated in FIG. 4;

FIG. 7 is an enlarged perspective view of the motor driving circuit board

31 and the radiating plate

32 illustrated in FIG. 6; and

FIG. 8 is an enlarged perspective view of the motor driving circuit board

31 and the radiating plate

32 of a modified example of this invention.

Claims

1. A motorized roller comprising:

2. The motorized roller according to claim 1, wherein the electronic device includes a transistor.

3. The motorized roller according to claim 1, wherein the electronic device comprises a circuit board within the roller body, the circuit board fed from a supply and causing a variation of current from the supply to the electric motor in response to conditions of the motor.

4. A motorized roller comprising:

5. The motorized roller according to claim 4, wherein thermally conductive grease is applied between the heat releaser and the electronic device.

6. The motorized roller according to claim 4, wherein an electrical insulator intervenes between the heat releaser and the electronic device.

7. The motorized roller according to claim 4, wherein the heat releaser and a device container made of plastic are housed within the roller body, the device container containing the electronic device and the heat releaser exposed to both inside and outside the device container.

8. The motorized roller according to claim 7, wherein an inner shell is housed within the roller body, the device container is housed within the inner shell and the heat releaser directly or indirectly contacts both the inner shell and the electronic device.

9. The motorized roller according to claim 7, wherein the device container has an opening into which the heat releaser is inserted.

10. A motorized roller comprising:

11. The motorized roller according to claim 10, wherein the inner shell is supported free from rotation.

12. The motorized roller according to claim 10, wherein the area of the outer surface of the inner shell is larger than that of the heat releaser.

13. The motorized roller according to claim 10, wherein the heat releaser has a curved outer surface conforming to the inner surface of the inner shell.

14. A motorized roller comprising:

15. The motorized roller according to claim 14 further comprising:

16. The motorized roller according to claim 14, wherein the electronic device includes a transistor.

17. The motorized roller according to claim 14, wherein the inner shell is supported unrotatably.

18. A unit for a motorized roller comprising:

19. The unit according to claim 18, wherein thermally conductive grease is applied between the heat-conducting member and the electronic device.

20. The unit according to claim 18, wherein the fixed shaft has an internal bore through which a cable for supplying electrical current to the motor in the driving portion runs.

21. The unit according to claim 18 further comprising a heat-conducting member kept in contact with both the electronic device and the casing.

22. A motorized roller comprising: