Dual-shaft synchronous motion device

• US 8,959,714 B2
• Filed: 06/06/2013
• Issued: 02/24/2015
• Est. Priority Date: 02/08/2013
• Status: Active Grant

• Current Assignee: First Dome Corporation
• Original Assignee: First Dome Corporation
• Inventors: Hsu, An Szu
• Primary Examiner(s): MAH, CHUCK Y
• Application Number:
  US13/911,201
• Publication Number:
  US 20140223693A1
• Time in Patent Office: 628 Days
• Field of Search: 163/54, 163/66, 163/65, 163/68, 163/69, 163/70, 163/42, 162/27, 361/679.08, 361/679.11, 361/679.02, 361/679.15, 361/679.27, 455/90.3, 455/575.1, 455/575.3, 455/575.8, 379/433.12, 379/433.13, 348/373, 348/333.01, 348/333.06, 348/794
• US Class Current: 16/287
• CPC Class Codes: E05Y 2999/00 Subject-matter not otherwise provided for in this subclass
• CPC Class Codes: G06F 1/1681 Details related solely to hinges hinge details related to the transmission of signals or power are classified in G06F1/1683

Abstract

A dual-shaft synchronous motion device includes a first shaft and a second shaft; a first rotor and a third rotor disposed on the first shaft and turned synchronously; a second rotor and a fourth rotor disposed on the second shaft and turned synchronously; and a tractive member disposed between the first rotor (the third rotor) and the second rotor (the fourth rotor). When the first shaft drives the first and third rotors to turn, the tractive member brings the second rotor to turn reversely relative to the first rotor. The fourth rotor makes the tractive member drive the third rotor so that the first and second shafts are turned synchronously.

Claims

1. A dual-shaft synchronous motion device, comprising:

a first shaft (10) and a second shaft (20), the first shaft (10) and the second shaft (20) respectively having a fixed end (10a, 20a) and a pivot end (10b, 20b);

a first rotor (11) and a third rotor (33) disposed on the first shaft (10) and turned synchronously;

a second rotor (22) and a fourth rotor (44) disposed on the second shaft (20) and turned synchronously;

a first tractive member (50) disposed between the first rotor (11) and the second rotor (22); and

a second tractive member (60) disposed between the third rotor (33) and the fourth rotor (44);

the first and second tractive members (50, 60) respectively link the first shaft (10) and the second shaft (20) to turn synchronously in opposite directions;

wherein the first, second, third and fourth rotors (11, 22, 33, 44) are in the form of a roller and each have a cylindrical main body (a) and a shoulder portion (b) formed at two ends of the main body (a).

2. The dual-shaft synchronous motion device as claimed in claim 1, wherein the cylindrical main body (a) has a diameter less than that of the diameter of the shoulder portion (b).

3. The dual-shaft synchronous motion device as claimed in claim 2, wherein the tractive member (50) wound from the first rotor (11) to the second rotor (22) and the tractive member (60) wound from the third rotor (33) to the fourth rotor (44) are wound in opposite directions so that the first shaft (10) and the second shaft (20) are turned in different directions.

4. The dual-shaft synchronous motion device as claimed in claim 3, wherein the first shaft (10) is turned in the range of 0-180 degrees, and the second shaft (20) is turned synchronously and reversely in the range of 0-180 degrees.

5. The dual-shaft synchronous motion device as claimed in claim 1, wherein the first, second, third and fourth rotors (11, 22, 33, 44) each have a shaft hole (c);

the shaft hole (c) corresponds in shape to the pivot ends (10b, 20b) of the first and second shafts (10, 20);

the shaft hole (c) is pivoted with the pivot ends (10b, 20b) of the first and second shafts (10, 20);

the first and third rotors (11, 33) and the first shaft (10) are turned together; and

the second and fourth rotors (22, 44) and the second shaft (20) are turned together.

6. The dual-shaft synchronous motion device as claimed in claim 5, wherein the pivot ends (10b, 20b) and the shaft hole (c) have a rectangular cross-section.

7. The dual-shaft synchronous motion device as claimed in claim 6, wherein the tractive member (50) wound from the first rotor (11) to the second rotor (22) and the tractive member (60) wound from the third rotor (33) to the fourth rotor (44) are wound in opposite directions so that the first shaft (10) and the second shaft (20) are turned in different directions.

8. The dual-shaft synchronous motion device as claimed in claim 7, wherein the first shaft (10) is turned in the range of 0-180 degrees, and the second shaft (20) is turned synchronously and reversely in the range of 0-180 degrees.

9. The dual-shaft synchronous motion device as claimed in claim 5, wherein the first and second tractive members (50, 60) are in the form of a cable and have respective first ends (51, 61) and second ends (52, 62);

the first end (51) of the first tractive member (50) is wound and fixed to the main body (a) of the first rotor (11);

the second end (52) of the first tractive member (50) is wound and fixed to the main body (a) of the second rotor (22);

the first end (61) of the second tractive member (60) is wound and fixed to the main body (a) of the third rotor (33); and

the second end (62) of the second tractive member (60) is wound and fixed to the main body (a) of the fourth rotor (44).

10. The dual-shaft synchronous motion device as claimed in claim 9, wherein the main body (a) of each of the first, second, third and fourth rotors (11, 22, 33, 44) has an engaging hole (d);

and the first and second ends (51, 61, 52, 62) of the first and second tractive members (50, 60) are inserted through the respective engaging hole (d) and connected with a fixing portion (70).

11. The dual-shaft synchronous motion device as claimed in claim 10, wherein the tractive member (50) wound from the first rotor (11) to the second rotor (22) and the tractive member (60) wound from the third rotor (33) to the fourth rotor (44) are wound in opposite directions so that the first shaft (10) and the second shaft (20) are turned in different directions.

12. The dual-shaft synchronous motion device as claimed in claim 11, wherein the first shaft (10) is turned in the range of 0-180 degrees, and the second shaft (20) is turned synchronously and reversely in the range of 0-180 degrees.

13. The dual-shaft synchronous motion device as claimed in claim 9, wherein the tractive member (50) wound from the first rotor (11) to the second rotor (22) and the tractive member (60) wound from the third rotor (33) to the fourth rotor (44) are wound in opposite directions so that the first shaft (10) and the second shaft (20) are turned in different directions.

14. The dual-shaft synchronous motion device as claimed in claim 13, wherein the first shaft (10) is turned in the range of 0-180 degrees, and the second shaft (20) is turned synchronously and reversely in the range of 0-180 degrees.

15. The dual-shaft synchronous motion device as claimed in claim 5, wherein the tractive member (50) wound from the first rotor (11) to the second rotor (22) and the tractive member (60) wound from the third rotor (33) to the fourth rotor (44) are wound in opposite directions so that the first shaft (10) and the second shaft (20) are turned in different directions.

16. The dual-shaft synchronous motion device as claimed in claim 15, wherein the first shaft (10) is turned in the range of 0-180 degrees, and the second shaft (20) is turned synchronously and reversely in the range of 0-180 degrees.

17. The dual-shaft synchronous motion device as claimed in claim 1, wherein the tractive member (50) wound from the first rotor (11) to the second rotor (22) and the tractive member (60) wound from the third rotor (33) to the fourth rotor (44) are wound in opposite directions so that the first shaft (10) and the second shaft (20) are turned in different directions.

18. The dual-shaft synchronous motion device as claimed in claim 17, wherein the first shaft (10) is turned in the range of 0-180 degrees, and the second shaft (20) is turned synchronously and reversely in the range of 0-180 degrees.

19. The dual-shaft synchronous motion device as claimed in claim 1, wherein after the first rotor (11) is turned 180 degrees along with the first shaft (10), the length of the first tractive member (50), wound on the first rotor (11), is at least equal to a half of the periphery of the first rotor (11).

20. The dual-shaft synchronous motion device as claimed in claim 1, wherein after the first rotor (11) is turned 180 degrees, the length of the first end (51) of the first tractive member (50), wound on the first rotor (11), is greater than a periphery distance that the first rotor (11) is turned 90 degrees.

21. The dual-shaft synchronous motion device as claimed in claim 1, wherein after the fourth rotor (44) is turned 180 degrees along with the second shaft (20), the length of the second tractive member (60), wound on the fourth rotor (44), is at least equal to a half of the periphery of the fourth rotor (44).

22. The dual-shaft synchronous motion device as claimed in claim 1, wherein after the fourth rotor (44) is turned 180 degrees, the length of the second end (62) of the second tractive member (60), wound on the fourth rotor (44), is equal greater than a periphery distance that the fourth rotor (44) is turned 90 degrees.

23. The dual-shaft synchronous motion device as claimed in claim 1, wherein the first shaft (10) and the second shaft (20) are mounted in a casing (30).

24. The dual-shaft synchronous motion device as claimed in claim 1, wherein the fixed ends (10a, 20a) of the first and second shafts (10, 20) cooperate with a fixed seat for the first and second shafts (10, 20) to be fixed to a display module (91) and a machine body module (92) of an electronic article (90).

25. The dual-shaft synchronous motion device as claimed in claim 24, wherein the display module (91) drives the first shaft (10) to turn in the range of 0-180 degrees, and the second shaft (20) and the machine body module (92) are turned synchronously and reversely in the range of 0-180 degrees.

26. The dual-shaft synchronous motion device as claimed in claim 1, wherein the first, second, third and fourth rotors (11, 22, 33, 44) and the first and second tractive members (50, 60) in cooperation with a fixture assembly (80) are assembled on the first shaft (10) and the second shaft (20).

27. The dual-shaft synchronous motion device as claimed in claim 1, wherein the first shaft (1) drives the first and third rotors (11, 33), the first tractive member (50) brings the second rotor (22) to turn reversely relative to the first rotor (11), and the fourth rotor (44) makes the second tractive member (60) drive the third rotor (33).