CN-121987456-A - Humerus proximal fracture rehabilitation training device with constant traction force

CN121987456ACN 121987456 ACN121987456 ACN 121987456ACN-121987456-A

Abstract

The invention discloses a proximal humerus fracture rehabilitation training device with constant traction force, which belongs to the field of medical equipment and comprises a base and a telescopic frame arranged on the base, a hinge structure, an arm support mechanism, a traction assembly and a fixed pulley, wherein the hinge structure is connected with the top of the telescopic frame through the hinge structure so as to allow the arm support structure and the telescopic frame to rotate relatively, the hinge center of the hinge structure forms a shoulder joint simulated rotation center, the traction assembly comprises an elastic energy storage structure and a traction rope which are connected with each other, the fixed pulley is connected with the outer wall of the arm support mechanism, the free end of the traction rope is connected to the elbow region of the adjustable arm support mechanism after the traction rope bypasses the fixed pulley and changes the direction, and therefore the traction rope is applied to the upper limb traction direction of a patient when the arm support mechanism rotates around the shoulder joint simulated rotation center, and always keeps consistent with the limb bearing axis direction defined by the arm support mechanism. By the arrangement, the invention can provide constant axial traction on the premise of ensuring that the fracture end is subjected to the shearing component of traction force.

Inventors

CHEN CHEN
LI JIAHUI
KONG DAN
CUI XIANG
GAO YUAN

Assignees

中国人民解放军总医院第一医学中心

Dates

Publication Date: 20260508
Application Date: 20260313

Claims (10)

1. The utility model provides a constant traction's proximal humerus fracture rehabilitation training device, includes the base and sets up the expansion bracket on the base, its characterized in that still includes: The arm support mechanism is used for bearing and fixing the upper limb of a patient; The arm support mechanism is connected with the top of the telescopic frame through the hinge structure so as to allow the arm support structure and the telescopic frame to rotate relatively, and the hinge center of the hinge structure forms a shoulder joint simulated rotation center; The traction assembly comprises an elastic energy storage structure and a traction rope which are connected with each other, and also comprises a fixed pulley connected to the outer wall of the arm support mechanism; The traction cable bypasses the fixed pulley and changes the direction, and the free end of the traction cable, which is away from the elastic energy storage structure, is connected to the elbow region of the adjustable arm support mechanism, so that when the arm support mechanism rotates around the shoulder joint simulated rotation center, the traction cable always keeps the traction direction applied to the upper limb of a patient consistent with the limb bearing axis defined by the arm support mechanism.
2. The proximal humerus fracture rehabilitation training device with constant traction force according to claim 1, wherein the elastic energy storage structure comprises a shell and a constant force spring rotatably arranged in the shell, the shell is detachably connected with the outer wall of the expansion frame, and the free end of the constant force spring penetrates through the shell to be connected with the traction cable.
3. The proximal humerus fracture rehabilitation training device with constant traction force according to claim 1 or 2, wherein the hinge structure comprises a hinge seat and a rotor which are rotationally embedded, a connecting shaft is arranged between the rotor and the arm support mechanism, and the connecting shaft is parallel to the rotation axis of the fixed pulley.
4. The proximal humerus fracture rehabilitation training device with constant traction force according to claim 1 or 2, wherein the arm support mechanism comprises an upper arm support for supporting an upper arm, a forearm support for supporting a forearm, and an elbow joint positioning support arranged between the upper arm support and the forearm support, and the elbow joint positioning support is provided with a locking structure for adjusting and fixing elbow joint flexion and extension angles.
5. The traction-constant proximal humerus fracture rehabilitation training device according to claim 4, wherein the elbow joint positioning support comprises a sliding plate and a connecting plate, wherein the sliding plate is hinged in a rotating manner and is connected with the connecting plate in a sliding manner along the length direction of the upper arm support, the locking structure is a fixing bolt connected with the sliding plate through a bolt, and the fixing bolt abuts against the connecting plate when being screwed tightly and limits the relative rotation of the sliding plate and the connecting plate.
6. The near-end fracture rehabilitation training device for the humerus with constant traction force according to claim 3, wherein the elbow joint positioning support further comprises an elastic support, two ends of the elastic support are fixedly connected with the sliding plate and the connecting plate respectively, the elastic support is driven to elastically deform when the upper arm support and the forearm arm support rotate relatively, a plurality of positioning grooves are formed in the end portion, away from the elastic plate, of the elastic support, and when a patient arm is placed on the upper arm support, the forearm arm support and the elbow joint positioning support, the positioning grooves are respectively matched with an olecranon of the patient arm, an epicondylar and an epicondylar of the humerus.
7. The traction-constant proximal humerus fracture rehabilitation training device according to claim 1, wherein the telescopic frame comprises a fixed support column fixedly connected with the base and a sliding support column in sliding sleeve connection with the fixed support column, and the hinge structure is connected to the end part of the sliding support column, which is away from the base.
8. A traction-constant proximal humerus fracture rehabilitation training device according to claim 7, wherein the base is connected with a plurality of universal wheels.
9. The traction-constant proximal humerus fracture rehabilitation training device according to claim 4, wherein the upper arm support is provided with a sliding groove along the length direction, and the sliding plate is slidingly connected with the sliding groove.
10. The traction-constant proximal humerus fracture rehabilitation training device according to claim 9, wherein the forearm support is provided with a plurality of forearm straps along the length direction, and the sliding plate is provided with a plurality of upper arm straps along the length direction.

Description

Humerus proximal fracture rehabilitation training device with constant traction force Technical Field The invention belongs to the technical field of medical appliances, and particularly relates to a proximal humerus fracture rehabilitation training device with constant traction. Background Proximal humerus fractures are a clinically common fracture type, and the treatment target thereof is not only to achieve anatomic reduction and tissue fixation through surgery, but also to restore shoulder joint function through early rehabilitation exercise of the system, so as to prevent complications such as joint stiffness, muscular atrophy and the like. At present, at the early clinical rehabilitation stage after the proximal humerus fracture operation, therapists mostly adopt a freehand mode to assist patients to perform passive or power-assisted mobility training of shoulder joints. This approach, while flexible, is difficult to maintain constant in both the magnitude and direction of the traction force applied by the therapist with bare hands, and involves the risk of detrimental shear forces being generated to the fractured ends or the internal bone fixtures due to improper force lines. In order to relieve the burden of therapists and standardize training, some upper limb rehabilitation training devices also exist on the market. These devices can be broadly divided into simple suspension devices and multi-joint training devices of complex construction, wherein the former are mainly used for early post-operative limb support and braking, with the aim of protecting the fracture site, but fail to provide axial traction to promote joint separation and relieve pain. The latter is typically integrated with sensors and drivers, which can be used for active, passive or resistive training of the elbow and wrist joint. However, the design of such devices does not generally take into account the multi-degree of freedom motion characteristics of the shoulder joint complex, and the applied training forces are difficult to precisely control as a pure axial distraction along the humeral anatomic axis, with a high risk of potential shear forces, and therefore their direct application to early rehabilitation of proximal humerus fractures is clearly not adapted. Therefore, there is a need for a device that meets the core needs of early recovery after proximal humerus fracture surgery, provides constant axial traction to relieve joint face pressure and pain while ensuring the shear component of traction to the fracture end, and simultaneously, adapts to different patients and guides their shoulder joints to perform controlled training within a safe range. Disclosure of Invention The invention aims to solve the defects of the prior art in the background art and provides an early rehabilitation exercise device suitable for patients with proximal humerus fracture. The device can simulate the rotation center of the shoulder joint, dynamically keep the direction of traction force applied to the upper limb when a patient performs multi-angle movement of the shoulder joint, so that the direction of traction force is always parallel to the axis direction of the humerus, and the traction direction is constant. Meanwhile, the device is also provided with a limb fixing mechanism with adjustable height, and patients with different heights in sitting and standing states can be effectively adapted to ensure correct force lines, so that a safe, efficient and easy-to-operate early rehabilitation auxiliary scheme for patients is formed. A traction force-constant proximal humerus fracture rehabilitation training device comprises a base and a telescopic frame arranged on the base, an arm support mechanism used for bearing and fixing an upper limb of a patient, a hinge structure connected with the top of the telescopic frame through the hinge structure so as to allow the arm support structure and the telescopic frame to rotate relatively, a shoulder joint simulated rotation center formed by the hinge center of the hinge structure, a traction assembly comprising an elastic energy storage structure and a traction rope which are connected with each other, and a fixed pulley connected to the outer wall of the arm support mechanism, wherein the traction rope bypasses the fixed pulley and changes direction, and the free end of the traction rope, deviating from the elastic energy storage structure, is connected to an elbow region of the adjustable arm support mechanism, so that the traction rope is applied to the upper limb of the patient when the arm support mechanism rotates around the shoulder joint simulated rotation center, and always keeps consistent with the limb bearing axis direction defined by the arm support mechanism. Further, the elastic energy storage structure comprises a shell and a constant force spring rotatably arranged in the shell, the shell is detachably connected with the outer wall of the expansion bracket, and the free end of the c