Swing chair

1. A swing chair comprising:

a support which is installed at a certain height or more above a floor;

a main operation member which is elongated and has a virtual first rotation axis provided to the support at one side thereof and which is rotatably coupled to the support;

a sub operation member which is elongated and has a virtual second rotation axis, provided to the support at one side thereof and spaced parallel to the first rotation axis, and which is rotatably coupled to the support;

a seat portion coupled to any one of the main operation member and the sub operation member; and

a rotation connecting member which is elongated and arranged in a front-rear direction and has a rear portion that is rotatably coupled to the other side of the main operation member and a front portion that is rotatably coupled to the other side of the sub operation member so that a closed virtual quadrangle is formed together with the support, the main operation member, and the sub operation member,

wherein an angle of coupling between the rotation connecting member and the main operation member is changed according to user's operation and the main operation member is interlocked with the virtual quadrangle and swings forward and backward based on the first rotation axis,

wherein a portion of the rotation connecting member protrudes forward in a longitudinal direction,

wherein the rotation connecting member is adjusted in a state in which a user is seated in the seat portion, and

wherein a separate operation handle is provided in front of a point of coupling between the rotation connecting member and the sub operation member, so that the rotation connecting member is arranged at a position where the user approaches the rotation connecting member while being seated in the seat portion.

2. The swing chair of claim 1 , wherein the rotation connecting member vertically swings about a point of coupling between the rotation connecting member and the sub operation member.

3. The swing chair of claim 2 , wherein when an external force is applied to a front portion of the rotation connecting member to rotate the rotation connecting member rearward, an interior angle of coupling between the rotation connecting member and the main operation member increases in the virtual quadrangle.

4. The swing chair of claim 1 , wherein a coupling position of the rotation connecting member and the sub operation member is adjusted along a longitudinal direction.

5. The swing chair of claim 1 , wherein the rotation connecting member is extended and contracted forward along a longitudinal direction.

6. The swing chair of claim 1 , wherein a front portion of the rotation connecting member along the longitudinal direction is formed in the shape of a foothold, so that the user operates the rotation connecting member using his/her foot while being seated in the seat portion.

7. The swing chair of claim 1 , wherein at least a portion of the main operation member in the longitudinal direction is formed in the shape of a wire.

8. The swing chair of claim 7 , wherein the seat portion is fixedly coupled to the main operation member.

9. The swing chair of claim 8 , wherein an area of the main operation member, which is arranged below the seat portion along the longitudinal direction, is formed in the shape of a frame.

10. The swing chair of claim 8 , wherein the sub operation member is formed in the shape of a wire.

11. The swing chair of claim 7 , further comprising:

a separate auxiliary support member which is elongated, and has one side that is connected to the support and the other side that is connected to the seat portion.

12. The swing chair of claim 11 , wherein the auxiliary support member is formed in the shape of a wire.

13. The swing chair of claim 1 , wherein the main operation member is formed in the shape of a frame, and

wherein the sub operation member is formed in the shape of a wire.

14. The swing chair of claim 13 , wherein the seat portion is fixedly coupled to a lower portion of the main operation member.

15. The swing chair of claim 13 , wherein the seat portion is fixedly coupled to a lower portion of the sub operation member.

16. The swing chair of claim 1 , wherein the main operation member is formed in the shape of a wire, and

wherein the sub operation member is formed in the shape of a frame.

17. The swing chair of claim 16 , wherein the seat portion is fixedly coupled to a lower portion of the main operation member.

18. The swing chair of claim 1 , wherein the main operation member and the sub operation member are formed in the shape of a frame.

19. The swing chair of claim 18 , wherein the first rotation axis and the second rotation axis are spaced apart from each other in a front-rear direction, and are coupled to the support.

20. The swing chair of claim 1 , wherein a handle is further provided in at least one of the seat portion and the rotation connecting member.

21. The swing chair of claim 1 , wherein the main operation member is provided in plurality, and the main operation members are spaced apart from each other on the first rotation axis, and

wherein the seat portion is fixedly coupled between the main operation members.

22. The swing chair of claim 1 , wherein the sub operation member is provided in plurality, and the sub operation members are spaced apart from each other on the second rotation axis, and

wherein the seat portion is fixedly coupled between the sub operation members.

23. The swing chair of claim 1 , wherein the seat portion further comprises a cradle.

24. The swing chair of claim 1 , wherein the seat portion or the rotation connecting member further comprises a massage means.

25. The swing chair of claim 1 , wherein the seat portion further comprises a means configured to measure physical information.