Venting device and venting method thereof

1. A venting device, comprising:

a first flap, configured to be actuated to swing upward during a rising time;

a second flap, disposed opposite to the first flap and configured to be actuated to swing downward during a falling time;

a first actuating portion, disposed on the first flap; and

a second actuating portion, disposed on the second flap;

wherein the venting device, configured to form a vent, is disposed within a wearable sound device or to be disposed within the wearable sound device;

wherein the vent is formed via applying a first voltage to the first actuating portion and applying a second voltage on the second actuating portion, such that the venting device gradually forms the vent.

2. The venting device of claim 1 , wherein the rising time or the falling time is equal to or more than 50 milliseconds.

3. The venting device of claim 1 , wherein the rising time or the falling time is longer than a threshold, such that no noticeable sound is perceived by human hearing when the venting device forms the vent.

4. The venting device of claim 1 ,

wherein the first voltage applied to the first actuating portion gradually increases during the rising time, and the second voltage applied to the second actuating portion gradually decreases during the falling time, such that the first flap gradually swings upward, the second flap gradually swings downward, and the vent of the venting device is gradually opened.

5. The venting device of claim 1 , wherein a delay is inserted between a start timing of the rising time and a start timing of the falling time.

6. The venting device of claim 1 , wherein the rising time overlaps with the falling time.

7. The venting device of claim 1 , wherein a delay between a start timing of the rising time and a start timing of the falling time is equal to or less than the rising time or the falling time.

8. The venting device of claim 1 ,

wherein the first voltage applied to the first actuating portion is unchanged during part of the falling time, and the second voltage applied to the second actuating portion is unchanged during part of the rising time.

9. The venting device of claim 1 , wherein

one of the first flap and the second flap swings after the other of the first flap and the second flap has already started swinging; or

a center of the vent of the venting device deviates from a center line of the venting device during most of the rising time or most of the falling time.

10. The venting device of claim 1 ,

wherein the venting device is driven by a driving circuit;

where the driving circuit is configured to output the first voltage to the first actuating portion and output the second voltage to the second actuating portion.

11. A venting method, comprising:

actuating a first flap to gradually swing upward during a rising time; and

actuating a second flap to gradually swing downward during a falling time;

wherein the venting method is applied for a venting device;

wherein the venting device is disposed within a wearable sound device or to be disposed within the wearable sound device;

wherein the venting device is configured to form a vent;

wherein the venting device comprises the first flap and the second flap.

12. The venting method of claim 11 , wherein the rising time or the falling time is equal to or more than 50 milliseconds.

13. The venting method of claim 11 , wherein the rising time or the falling time is longer than a threshold duration, such that no noticeable sound is perceived by human hearing when the venting device forms the vent.

14. The venting method of claim 11 , comprising:

applying a first voltage to a first actuating portion on the first flap; and

applying a second voltage to a second actuating portion on the second flap;

wherein the first voltage gradually increases during the rising time and the second voltage gradually decreases during the falling time, such that the venting device gradually opens the vent.

15. The venting method of claim 11 , comprising:

inserting a delay between a start timing of the rising time and a start timing of the falling time.

16. The venting method of claim 11 , wherein the rising time overlaps with the falling time.

17. A venting device, comprising:

a first flap, configured to be actuated to gradually swing upward during a rising time; and

a second flap, disposed opposite to the first flap and configured to be actuated to swing downward during a falling time;

wherein a slit is formed between the first flap and the second flap;

wherein the venting device is configured to form a vent, and the vent is formed because of the slit;

wherein the venting device is disposed within a wearable sound device or to be disposed within the wearable sound device.

18. The venting device of claim 17 , wherein the second flap is configured to remain stationary during the rising time.

19. The venting device of claim 17 , wherein the rising time or the falling time is equal to or more than 50 milliseconds.

20. The venting device of claim 17 , wherein the second flap is configured to be actuated to gradually swing upward during a second rising time, and a delay between a start timing of the rising time and a start timing of the second rising time of the second flap is equal to or less than the rising time or the second rising time.

21. The venting device of claim 17 , wherein the first flap is configured to remain stationary during the falling time.