Duvet cover and duvet assembly

1 . A duvet cover, comprising:

a zipper; wherein the zipper comprises at least one lower zipper chain and at least one upper zipper chain that cooperate with each other, and a slider that slidably cooperates with the at least one lower zipper chain and the at least one upper zipper chain; and

a cover body, comprising a lower cover piece and an upper cover piece; wherein the lower cover piece comprises a lower accommodation zone located in a central part of the lower cover piece and a lower flange connected to an outer edge of the lower accommodation zone; the at least one lower zipper chain is stitched between the lower accommodation zone and the lower flange; the upper cover piece comprises an upper accommodation zone located in a central part of the upper cover piece and an upper flange connected to an edge of the upper accommodation zone; the at least one upper zipper chain is stitched between the upper accommodation zone and the upper flange; the upper accommodation zone and the lower accommodation zone are opposite to each other and enclose to define a duvet insert accommodation cavity;

wherein the at least one upper zipper chain is located on an inner side of the at least one lower zipper chain, with teeth of the at least one upper zipper chain and teeth of the at least one lower zipper chain facing each other; the at least one upper zipper chain, the at least one lower zipper chain, the lower flange, and the lower accommodation zone are arranged side by side;

wherein the at least one lower zipper chain is at least two lower zipper chains arranged at an angle to each other, and the at least one upper zipper chain is at least two upper zipper chains arranged at an angle to each other; the zipper further comprises a lower transition portion and an upper transition portion; the lower transition portion connects adjacent two lower zipper chains of the at least two lower zipper chains, and the upper transition portion connects adjacent two upper zipper chains of the at least two upper zipper chains;

teeth of the upper transition portion and the lower transition portion face each other, and a side-by-side direction of the upper transition portion and the lower transition portion is arranged at an angle to the lower flange;

wherein the upper transition portion comprises an upper corner segment and two upper transition segments; the two upper transition segments connect two ends of the upper corner segment to the adjacent two upper zipper chains, respectively; the lower transition portion comprises a lower corner segment and two lower transition segments; the two lower transition segments connect two ends of the lower corner segment to the adjacent two lower zipper chains, respectively; the lower corner segment and the upper corner segment are aligned in a covering direction of the lower cover piece and the upper cover piece; and

wherein the duvet cover further comprises at least one tie strap; wherein each of the at least one tie strap is fixedly stitched at a connection between the lower flange and the lower accommodation zone and located within the duvet insert accommodation cavity.

2 . The duvet cover according to claim 1 , wherein each lower corner segment is arranged with a corresponding tie strap of the at least one tie strap.

3 . The duvet cover according to claim 1 , wherein a side edge of the lower cover piece is stitched to a side edge of the upper cover piece, other three side edges of the lower cover piece are each arranged with a corresponding lower zipper chain, and other three side edges of the upper cover piece are each arranged with a corresponding upper zipper chain.

4 . The duvet cover according to claim 1 , wherein an edge of the lower cover piece is folded back towards an edge of the lower accommodation zone to overlap and form the lower flange, and the lower zipper chain is stitched between two opposing fabric surfaces of the lower flange.

5 . The duvet cover according to claim 4 , wherein an edge of the upper cover piece is folded back towards an edge of the upper accommodation zone to overlap and form the upper flange, and the upper zipper chain is stitched onto a fabric surface of the upper flange facing the lower cover piece.

6 . The duvet cover according to claim 5 , wherein a distance between teeth of each of the at least one lower zipper chain and a stitching line when the lower zipper chain is stitched to the lower flange is greater than a distance between teeth of each of the at least one upper zipper chain and a stitching line when the upper zipper chain is stitched to the upper flange.

7 . A duvet assembly, comprising a duvet insert and a duvet cover;

wherein the duvet cover comprises:

a zipper; wherein the zipper comprises at least one lower zipper chain and at least one upper zipper chain that cooperate with each other, and a slider that slidably cooperates with the at least one lower zipper chain and the at least one upper zipper chain; and

a cover body, comprising a lower cover piece and an upper cover piece; wherein the lower cover piece comprises a lower accommodation zone located in a central part of the lower cover piece and a lower flange connected to an outer edge of the lower accommodation zone; the at least one lower zipper chain is stitched between the lower accommodation zone and the lower flange; the upper cover piece comprises an upper accommodation zone located in a central part of the upper cover piece and an upper flange connected to an edge of the upper accommodation zone; the at least one upper zipper chain is stitched between the upper accommodation zone and the upper flange; the upper accommodation zone and the lower accommodation zone are opposite to each other and enclose to define a duvet insert accommodation cavity;

wherein the at least one upper zipper chain is located on an inner side of the at least one lower zipper chain, with teeth of the at least one upper zipper chain and teeth of the at least one lower zipper chain facing each other; the at least one upper zipper chain, the at least one lower zipper chain, the lower flange, and the lower accommodation zone are arranged side by side;

wherein the duvet insert is placed within the duvet insert accommodation cavity of the duvet cover;

wherein the at least one lower zipper chain is at least two lower zipper chains arranged at an angle to each other, and the at least one upper zipper chain is at least two upper zipper chains arranged at an angle to each other; the zipper further comprises a lower transition portion and an upper transition portion; the lower transition portion connects adjacent two lower zipper chains of the at least two lower zipper chains, and the upper transition portion connects adjacent two upper zipper chains of the at least two upper zipper chains;

teeth of the upper transition portion and the lower transition portion face each other, and a side-by-side direction of the upper transition portion and the lower transition portion is arranged at an angle to the lower flange;

wherein the upper transition portion comprises an upper corner segment and two upper transition segments; the two upper transition segments connect two ends of the upper corner segment to the adjacent two upper zipper chains, respectively; the lower transition portion comprises a lower corner segment and two lower transition segments; the two lower transition segments connect two ends of the lower corner segment to the adjacent two lower zipper chains, respectively; the lower corner segment and the upper corner segment are aligned in a covering direction of the lower cover piece and the upper cover piece; and

wherein the duvet cover further comprises at least one tie strap; wherein each of the at least one tie strap is fixedly stitched at a connection between the lower flange and the lower accommodation zone and located within the duvet insert accommodation cavity.

8 . The duvet assembly according to claim 7 , wherein each lower corner segment is arranged with a corresponding tie strap of the at least one tie strap.

9 . The duvet assembly according to claim 7 , wherein a side edge of the lower cover piece is stitched to a side edge of the upper cover piece, other three side edges of the lower cover piece are each arranged with a corresponding lower zipper chain, and other three side edges of the upper cover piece are each arranged with a corresponding upper zipper chain.

10 . The duvet assembly according to claim 7 , wherein an edge of the lower cover piece is folded back towards an edge of the lower accommodation zone to overlap and form the lower flange, and the lower zipper chain is stitched between two opposing fabric surfaces of the lower flange.

11 . The duvet assembly according to claim 10 , wherein an edge of the upper cover piece is folded back towards an edge of the upper accommodation zone to overlap and form the upper flange, and the upper zipper chain is stitched onto a fabric surface of the upper flange facing the lower cover piece.

12 . The duvet assembly according to claim 11 , wherein a distance between teeth of each of the at least one lower zipper chain and a stitching line when the lower zipper chain is stitched to the lower flange is greater than a distance between teeth of each of the at least one upper zipper chain and a stitching line when the upper zipper chain is stitched to the upper flange.