Patent ID: 11944199
Assignee: REMACRO TECHNOLOGY CO., LTD.
Field: Furniture, games (Other fields)
Classification: CPC A | IPC A

Claim 8:
9. The mechanical stretching device according to claim 8, wherein the leg stretching structure comprises a footrest extension mechanism, and the footrest extension mechanism further comprises a coupling rod, a second footrest element, and a footrest connection element;
the second connecting rod comprises a first end hinged to the first footrest element, and a second end hinged to the first connecting rod, the first connecting rod is hinged to the linkage support of the seat unit, the fourth connecting rod comprises a first end hinged to the second footrest element, and a second end hinged to the third connecting rod, the first footrest element is hinged to a first end of the coupling rod, and a second end of the coupling rod is hinged to a middle of the fourth connecting rod;
the footrest connection element comprises a first connection element and a second connection element, the first connection element comprises a first end hinged to a middle of the second footrest element, and a second end hinged to a first end of the second connection element, a second end of the second connection element is hinged to the middle of the second connecting rod, and a middle of the second connection element is hinged to the middle of the fourth connecting rod;
the middle of the second footrest element is provided with a first limit element, and when the first limit element abuts against the second connection element, the second footrest element is retracted to a limit position to prevent the footrest element from being loose;
an end of the second connecting rod close to the first footrest element is provided with a second connecting point, and the second connecting rod is connected to the second connection element at the second connecting point;
an end of the fourth connecting rod close to the second footrest element is sequentially provided with a footrest connecting point, a coupling rod connecting point, and a connection element connecting point; and
the fourth connecting rod is connected to the second footrest element at the footrest connecting point, the fourth connecting rod is connected to the coupling rod at the coupling rod connecting point, the fourth connecting rod is connected to the second connection element at the connection element connecting point, and the coupling rod connecting point is provided between the footrest connecting point and the connection element connecting point.