US 12,290,289 B1
Elastic intramedullary fixation device
Licheng Zhang, Beijing (CN); Peifu Tang, Beijing (CN); Xiang Cui, Beijing (CN); Chi Ma, Beijing (CN); Houchen Lv, Beijing (CN); Jia Li, Beijing (CN); and Hua Chen, Beijing (CN)
Assigned to The Fourth Medical Center of the Chinese People's Liberation Army General Hospital, Beijing (CN)
Filed by The Fourth Medical Center of the Chinese People's Liberation Army General Hospital, Beijing (CN)
Filed on Jan. 10, 2025, as Appl. No. 19/017,237.
Claims priority of application No. 202410344282.0 (CN), filed on Mar. 25, 2024.
Int. Cl. A61B 17/72 (2006.01)
CPC A61B 17/7208 (2013.01) [A61B 17/7233 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An elastic intramedullary fixation device, comprising a serpentine frame and a shell, wherein one end of the serpentine frame is provided with a drill bit, fibers are inserted into an inner surface of the serpentine frame and an inner surface of the shell respectively, the inner surface of the shell is rotatably connected with a locking rod, a key rod is inserted into one end of the locking rod, one end of the key rod is fixedly connected with a key head, a clamping rod is inserted into one end of the shell, outer surfaces of the clamping rod and the key rod are sleeved with a connecting sleeve, and a guide wire hole is defined in inner surfaces of the drill bit, the serpentine frame, the locking rod and the key rod respectively;
the outer surfaces of the clamping rod and the key rod are provided with a connecting component, the connecting component is configured to fix a relative position between the clamping rod and the key rod, and the connecting component is respectively connected with the clamping rod and the key rod;
surfaces of the clamping rod and the shell are provided with a self-locking component, the self-locking component is configured to lock a relative position between the clamping rod and the shell, and the self-locking component is respectively connected with the clamping rod and the shell;
the connecting component comprises the connecting sleeve sleeved on the outer surface of the key rod, an inner surface of the connecting sleeve is fixedly connected with a connecting piece, surfaces of the key rod and the clamping rod are provided with a first groove, the outer surface of the clamping rod is provided with a second groove, and the outer surface of the key rod is provided with a third groove; and
the inner surface of the connecting sleeve is fixedly connected with an arc-shaped elastic sheet group, and the connecting piece and the connecting sleeve are fixedly connected through the arc-shaped elastic sheet group; a surface of the connecting piece is provided with an inclined structure with self-guidance; and the outer surface of the clamping rod is fixedly connected with a stop piece.