String collecting device and article having string

1. A string collecting device, comprising a rotating part and a string winding part configured to wind a string,

wherein the rotating part is provided with at least one movable part that can be moved, and

each movable part is configured to be engaged with the string winding part when the rotating part is rotated towards a string collecting direction,

wherein when the movable part is engaged with the string winding part, the rotating part, the at least one movable part and the string winding part are connected to be in synchronous rotation,

wherein the rotating part is provided with a toggle portion configured to drive the at least one movable part to move in a radial direction of the rotating part,

wherein each movable part comprises a pull-out surface interacting with the toggle portion;

the toggle portion comprises a pull-out structure, and the pull-out structure is configured to press the pull-out surface, when the rotating part is rotated towards the string collecting direction, so as to drive the movable part to be engaged with the string winding part;

the pull-out structure is provided on a central axis of the rotating part;

the pull-out structure comprises at least one pressing portion which is in one-to-one correspondence with the at least one movable part, and each pressing portion is configured to press against the respective pull-out surface;

the toggle portion further comprises a pull-back structure, and the movable part comprises a pull-back surface arranged opposite to the pull-out surface;

the pull-back structure is configured to push and press the pull-back surface, when the rotating part is rotated towards a direction opposite to the string collecting direction, so as to drive the at least one movable part to be separated from the string winding part; and

the pull-back structure comprises at least one pull-back block, which is in one-to-one correspondence with the movable part.

2. The string collecting device according to claim 1 , wherein each movable part comprises meshing teeth, and the string winding part is provided with a gear ring corresponding to the meshing teeth.

3. The string collecting device according to claim 1 , wherein the rotating part is provided with a sliding groove, and the movable part is provided with an insertion portion,

wherein the insertion portion is inserted into and slidably connected with the sliding groove.

4. The string collecting device according to claim 1 , wherein the string winding part is rotatably disposed inside a fixing part, and the rotating part is sleeved on and rotatably connected with the fixing part.

5. The string collecting device according to claim 4 , wherein the fixing part is provided thereon with a rotation restricting part configured to restrict the rotating part such that the rotating part is rotatable only in the string collecting direction,

wherein the rotation restricting part comprises a ratchet wheel, and the rotating part is provided thereon with pawls corresponding to the ratchet wheel; and

the rotating part comprises a rotary cover and a turnplate rotatably provided in the rotary cover.

6. The string collecting device according to claim 5 , wherein the rotary cover is provided thereon with a driving portion configured to drive the turnplate to rotate in the string collecting direction,

wherein the driving portion comprises arc grooves, and the turnplate is provided thereon with protrusions which are coaxially arranged with and are in one-to-one correspondence with the arc grooves; and

the protrusions are inserted into the arc grooves respectively, and by abutting against the respective protrusions, end portions of the arc grooves enable the turnplate to synchronously rotate with the rotary cover,

wherein a plurality of the arc grooves are provided and distributed in an array which is annular about a central axis of the rotary cover.

7. The string collecting device according to claim 5 , wherein the rotary cover is provided thereon with a snap-fit portion configured to be snap-fitted with the turnplate.

8. The string collecting device according to claim 7 , wherein the snap-fit portion comprises elastic hooks, and the turnplate is provided thereon with engagement grooves which are snap-fitted with the hooks respectively; and

a plurality of the hooks are provided and distributed in an array which is annular about a central axis of the rotary cover.

9. An article having a string, comprising the string and the string collecting device according to claim 1 .

10. The string collecting device according to claim 2 , wherein the rotating part is provided with a toggle portion configured to drive the at least one movable part to move in a radial direction of the rotating part,

wherein each movable part comprises a pull-out surface interacting with the toggle portion;

the toggle portion comprises a pull-out structure, and the pull-out structure is configured to press the pull-out surface, when the rotating part is rotated towards the string collecting direction, so as to drive the movable part to be engaged with the string winding part;

the pull-out structure is provided on a central axis of the rotating part;

the pull-out structure comprises at least one pressing portion which is in one-to-one correspondence with the at least one movable part, and each pressing portion is configured to press against the respective pull-out surface;

the toggle portion further comprises a pull-back structure, and the movable part comprises a pull-back surface arranged opposite to the pull-out surface;

the pull-back structure is configured to push and press the pull-back surface, when the rotating part is rotated towards a direction opposite to the string collecting direction, so as to drive the at least one movable part to be separated from the string winding part; and

the pull-back structure comprises at least one pull-back block, which is in one-to-one correspondence with the movable part.

11. The string collecting device according to claim 3 , wherein the rotating part is provided with a toggle portion configured to drive the at least one movable part to move in a radial direction of the rotating part,

wherein each movable part comprises a pull-out surface interacting with the toggle portion;

the toggle portion comprises a pull-out structure, and the pull-out structure is configured to press the pull-out surface, when the rotating part is rotated towards the string collecting direction, so as to drive the movable part to be engaged with the string winding part;

the pull-out structure is provided on a central axis of the rotating part;

the pull-out structure comprises at least one pressing portion which is in one-to-one correspondence with the at least one movable part, and each pressing portion is configured to press against the respective pull-out surface;

the toggle portion further comprises a pull-back structure, and the movable part comprises a pull-back surface arranged opposite to the pull-out surface;

the pull-back structure is configured to push and press the pull-back surface, when the rotating part is rotated towards a direction opposite to the string collecting direction, so as to drive the at least one movable part to be separated from the string winding part; and

the pull-back structure comprises at least one pull-back block, which is in one-to-one correspondence with the movable part.

12. The article according to claim 9 , wherein each movable part comprises meshing teeth, and the string winding part is provided with a gear ring corresponding to the meshing teeth.

13. The article according to claim 9 , wherein the rotating part is provided with a sliding groove, and the movable part is provided with an insertion portion,

wherein the insertion portion is inserted into and slidably connected with the sliding groove.

14. The article according to claim 9 , wherein the rotating part is provided with a toggle portion configured to drive the at least one movable part to move in a radial direction of the rotating part,

wherein each movable part comprises a pull-out surface interacting with the toggle portion;

the toggle portion comprises a pull-out structure, and the pull-out structure is configured to press the pull-out surface, when the rotating part is rotated towards the string collecting direction, so as to drive the movable part to be engaged with the string winding part;

the pull-out structure is provided on a central axis of the rotating part;

the pull-out structure comprises at least one pressing portion which is in one-to-one correspondence with the at least one movable part, and each pressing portion is configured to press against the respective pull-out surface;

the toggle portion further comprises a pull-back structure, and the movable part comprises a pull-back surface arranged opposite to the pull-out surface;

the pull-back structure is configured to push and press the pull-back surface, when the rotating part is rotated towards a direction opposite to the string collecting direction, so as to drive the at least one movable part to be separated from the string winding part; and

the pull-back structure comprises at least one pull-back block, which is in one-to-one correspondence with the movable part.

15. The article according to claim 9 , wherein the string winding part is rotatably disposed inside a fixing part, and the rotating part is sleeved on and rotatably connected with the fixing part.

16. The article according to claim 15 , wherein the fixing part is provided thereon with a rotation restricting part configured to restrict the rotating part such that the rotating part is rotatable only in the string collecting direction,

wherein the rotation restricting part comprises a ratchet wheel, and the rotating part is provided thereon with pawls corresponding to the ratchet wheel; and

the rotating part comprises a rotary cover and a turnplate rotatably provided in the rotary cover.

17. The article according to claim 16 , wherein the rotary cover is provided thereon with a driving portion configured to drive the turnplate to rotate in the string collecting direction,

wherein the driving portion comprises arc grooves, and the turnplate is provided thereon with protrusions which are coaxially arranged with and are in one-to-one correspondence with the arc grooves; and

the protrusions are inserted into the arc grooves respectively, and by abutting against the respective protrusions, end portions of the arc grooves enable the turnplate to synchronously rotate with the rotary cover,

wherein a plurality of the arc grooves are provided and distributed in an array which is annular about a central axis of the rotary cover.

18. The article according to claim 16 , wherein the rotary cover is provided thereon with a snap-fit portion configured to be snap-fitted with the turnplate.

19. The article according to claim 18 , wherein the snap-fit portion comprises elastic hooks, and the turnplate is provided thereon with engagement grooves which are snap-fitted with the hooks respectively; and

a plurality of the hooks are provided and distributed in an array which is annular about a central axis of the rotary cover.