Automatic shoulder joint traction instrument

Abstract

The invention discloses an automatic shoulder joint traction instrument, and belongs to the technical field of shoulder joint traction. Comprising a supporting frame, a fixed pulley is fixed to a cross arm of the supporting frame, a traction rope is wound around the fixed pulley, an angle adjusting base is arranged on the supporting frame in a sliding mode, the angle adjusting base is rotationally connected with a redirection arm capable of being adjusted in a telescopic mode through a shaft rod, the redirection arm comprises two movable rods which are elastically connected, and the traction rope is detachably installed on the two movable rods; the height of the angle adjusting seat is adjusted along a track set by the supporting frame so as to adjust the height of the lifting arm in a traction state; the distance between the handles at the two ends of the traction rope is adjusted through the two movable rods so that the swing arm area can be adjusted. Structural innovation (elastic resistance grading, multi-angle locking and modular switching) and biomechanical adaptation (arc track and dynamic compensation) are achieved, precision, safety and functionalization of shoulder joint rehabilitation training are achieved, and the technical effects of meeting individual requirements of patients with different heights and different disease courses are achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of shoulder joint traction, and more specifically, to an automatic shoulder joint traction device. Background Art

[0002] A shoulder stretcher (also known as an upper limb traction device) is a rehabilitation device used to improve the range of motion of the shoulder joint, relieve pain and muscle tension, and mainly helps patients gradually recover shoulder function through external force traction.

[0003] Although existing devices support arc trajectory traction, community popularization devices (such as upper limb traction devices) only support basic traction modes and cannot adapt to the different rehabilitation needs of different users, resulting in a single training method.

[0004] In view of this, we propose an automatic shoulder joint traction device. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic shoulder joint traction device, which solves the technical problems raised in the above background art, realizes structural innovation (elastic resistance grading, multi-angle locking, modular switching) and biomechanical adaptation (arc trajectory, dynamic compensation), and realizes the precision, safety and functionality of shoulder joint rehabilitation training, achieving the technical effect of meeting the personalized needs of patients with different heights and different courses of disease.

[0006] The technical solution of the present invention provides an automatic shoulder joint traction device, including a support frame. A fixed pulley is fixed on the cross arm of the support frame, and a traction rope is wound around the fixed pulley. An angle adjustment seat is slidably arranged on the support frame, and a telescopic and adjustable redirecting arm is rotatably connected to the angle adjustment seat through a shaft rod. The redirecting arm includes two elastically connected movable rods, and the traction rope is detachably installed on the two movable rods; The angle adjustment seat adjusts along the set trajectory height of the support frame to adjust the lifting height of the arm during the traction state; The distance between the handles at both ends of the traction rope is adjusted by the two movable rods to adjust the swing arm area; When the two movable rods are fixed, the redirecting arm swings back and forth around the shaft rod by pulling the handle, forming an arc motion trajectory that conforms to the range of motion of the shoulder joint; When the two movable rods are elastically connected, the redirecting arm swings back and forth around the shaft rod by pulling the handle and slides, so as to realize multi-angle oblique traction of the shoulder joint during the arc motion trajectory.

[0007] As an optional solution of the technical solution of the present invention document, a spring is fixed between the two movable rods, and a positioning screw is threadedly connected to the redirecting arm; The spring is segmented and positioned by the positioning screw to realize the adjustment of the resilience force and sliding state of the two movable rods; Among them, when the spring is positioned by the positioning screw rod, the two movable rods slide independently; When the positioning screw rod disengages from the spring, the two movable rods slide interactively.

[0008] As an alternative to the technical solution of the present invention document, a plurality of leaf springs are fixed to one end of the movable rod away from the spring, and a swing rod is fixed to one end of the leaf spring away from the movable rod; The pulling rope is detachably installed on the swing rod, and the swing rod is detachably installed on the movable rod; Among them, when the swing rod is fixed to the movable rod, the swing rod swings following the movable rod; when the swing rod is disassembled from the movable rod and the shaft rod is fixed, through the elastic deformation of the leaf spring, the shoulder joint realizes a progressive load adaptation from low to high during the pulling process.

[0009] As an alternative to the technical solution of the present invention document, the redirecting arm further includes a support tube, the spring is disposed inside the support tube, the movable rod is slidably inserted into the support tube, and the shaft rod is fixed to the support tube; A support column is fixed on the support frame, the angle adjustment seat includes a sleeve sleeved on the support column, a first locking screw threadedly connected to the sleeve and abutted against the support column, a shaft sleeve is fixed on the sleeve, and the shaft rod is rotatably disposed in the shaft sleeve through a bearing.

[0010] As an alternative to the technical solution of the present invention document, a long screw rod threadedly connected to the movable rod is inserted into the swing rod, a rope passing hole for the pulling rope to pass through is formed in the swing rod, and a third locking screw with a rubber pad at one end and abutted against the pulling rope is threadedly connected to the swing rod.

[0011] As an alternative to the technical solution of the present invention document, a bolt with a nut is fixed to one end of the movable rod away from the leaf spring, strip-shaped holes are symmetrically formed on the support tube, and the bolt passes through and slides along the strip-shaped holes.

[0012] As an alternative to the technical solution of the present invention document, a second locking screw threadedly connected to the shaft rod and abutted against the shaft rod is disposed on the shaft sleeve, and a plurality of positioning grooves are annularly formed on the shaft rod.

[0013] As an alternative to the technical solution of the present invention document, a plurality of positioning holes corresponding to the first locking screw are formed on the support column.

[0014] One or more technical solutions provided in the embodiments of the present invention have at least the following technical effects or advantages: 1. Through the height adjustment of the angle-adjusting base and the telescopic design of the redirecting arm, the present invention can accurately control the angles "b" and "a" of the pulling rope, achieve multi-directional fixed-angle locking, adapt to the compound movement modes of shoulder joint abduction, internal rotation, and forward flexion, and improve the pertinence of rehabilitation training.

[0015] 2. Through the elastic adjustment function of the distance between the handles, the present invention allows the device to match users of different heights and provides differentiated traction modes for the acute stage (low resistance / small swing amplitude) and recovery stage (high resistance / large swing amplitude) of patients with scapulohumeral periarthritis, avoiding over-stretching injury. 3. Through the spring segmented positioning (adjustment of the positioning screw) and the non-linear deformation characteristics of the leaf spring, the present invention can achieve progressive loading of elastic resistance from low to high during the pulling process, which can not only protect the adhesed tissues from violent stretching but also simulate the actual force differences of the muscle groups around the shoulder joint through non-uniform resistance (such as the difference in the compression amount of the springs on both sides), promoting the recovery of muscle coordination.

[0016] 4. Through the design of the arc swing trajectory of the redirecting arm (with the shaft rod as the axis) combined with the sliding compensation of the elastic movable rod, the present invention ensures that the shoulder joint always moves along the physiological range of motion during traction, restricts abnormal shear stress (such as the transverse shear force of the glenohumeral joint), reduces the risk of cartilage wear and ligament overload, and at the same time prevents instantaneous impact injury through the spring energy dispersion characteristics. 5. Through the modular design (disassembly of the swing rod and the movable rod, detachment / insertion of the positioning screw, locking and separation of the second locking screw), the present invention allows the device to quickly switch between the arc traction, fixed-angle diagonal pull, and vertical traction modes, meets the diverse movement requirements in rehabilitation training (such as simulating daily actions like combing hair and dressing), and improves the training efficiency and functional muscle strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 is a schematic diagram of the overall structure of a shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention; Figure 2 is a schematic diagram of the structure at the sleeve of a shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention; Figure 3 is a schematic diagram of the structure at the support tube of a shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention; Figure 4 is an exploded view of the support tube of a shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention; Figure 5 is a schematic diagram of the multi-angle diagonal pull state structure during the arc movement trajectory of a shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention; Figure 6Schematic structural diagram of the horizontal lateral traction state of a shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention; Figure 7 A shoulder joint automatic traction device disclosed in a preferred embodiment of the present invention Figure 6 Enlarged structural diagram at position A in Description of reference numerals in the figure: 10, support frame; 11, support column; 20, fixed pulley; 30, traction rope; 31, handle; 40, angle adjustment seat; 41, sleeve; 411, first locking screw; 42, shaft sleeve; 421, second locking screw; 50, redirecting arm; 51, support tube; 511, strip hole; 512, positioning screw; 52, movable rod; 520, swing rod; 521, rope passing hole; 522, bolt; 523, nut; 53, spring; 54, shaft rod; 541, positioning groove; 55, third locking screw; 56, leaf spring; 57, long screw. Detailed implementation manners

[0018] The present invention will be further described in detail below with reference to the accompanying drawings of the specification.

[0019] As Figure 1 - Figure 7 As shown, a shoulder joint automatic traction device includes a support frame 10. In order to meet the needs of people of different heights, the support frame 10 is of a liftable structure. A fixed pulley 20 is fixed on the cross arm of the support frame 10, and a traction rope 30 is wound around the fixed pulley 20, so that the traction rope 30 forms an inverted V-shaped structure. The traction rope 30 swings with the fixed pulley 20 as a fulcrum, reducing the wear of the traction rope 30 during traction. At the same time, an angle adjustment seat 40 is slid vertically on the support frame 10. The angle adjustment seat 40 adjusts the height along the set track of the support frame 10 to adjust the height of the lifted arm during the traction state. By adjusting the height of the angle adjustment seat 40, the included angle "b" between the traction rope 30 and the redirecting arm 50 can be adjusted. When the angle adjustment seat 40 rises, the included angle "b" becomes smaller, and vice versa. By adjusting the height of the angle adjustment seat 40, the distance between the two handles 31 can be adjusted; At the same time, under the support of the redirecting arm 50, when the distance between the handles 31 is adjusted, their heights also follow the adjustment, and thus the heights of the handles 31 can be adaptively adjusted; the larger the included angle "b", the larger the swing amplitude of the shoulder joint, and vice versa; In order to better adapt to people of different heights, a retractable and adjustable redirecting arm 50 is rotatably connected to the angle-adjusting seat 40 through a shaft rod 54. The redirecting arm 50 includes two movably connected rods 52 that are elastically connected. The pulling rope 30 is detachably installed on the two movably connected rods 52. Through the adjustment of the two movably connected rods 52, when the two movably connected rods 52 are adjusted relative to each other, the two handles 31 approach each other, and vice versa, so as to adjust the swing arm area. The user adjusts the pulling range of the handle 31 according to the range of motion of their own shoulder joint to achieve progressive exercise, which is suitable for patients with periarthritis of the shoulder at different rehabilitation stages; When the two movably connected rods 52 are fixed, the redirecting arm 50 swings back and forth around the shaft rod 54 through the reciprocating pulling of the handle 31. During the change of the angle "a" between the redirecting arm 50 and the angle-adjusting seat 40, the two arms are reciprocally pulled up and down. By restricting the traction direction through the structure of the redirecting arm 50, the user forms an arc motion trajectory that conforms to the range of motion of the shoulder joint during the up and down pulling, avoiding excessive stretching or incorrect stress on the shoulder joint; When the two movably connected rods 52 are elastically connected, when the redirecting arm 50 swings back and forth around the shaft rod 54 through the reciprocating pulling of the handle 31, that is, while the shoulder joint is moving along an arc trajectory, it can also make the movably connected rod 52 slide along a set trajectory and, under the action of elastic rebound, to achieve multi-angle oblique pulling during the arc motion trajectory. The oblique pulling can adjust the force application direction through the arc trajectory, which is closer to the compound movement mode of upper limb rotation and abduction in daily life, promoting the coordinated contraction of the rotator cuff muscles (such as the supraspinatus muscle and the infraspinatus muscle) and the deltoid muscle, enhancing the functional muscle strength. Simulating multi-angle daily movements, it plays the role of simulating multi-angle daily movements, and at the same time increases the non-vertical stress stimulation of the shoulder joint capsule and ligaments, enhancing the dynamic control ability of the glenohumeral joint in the coronal plane and sagittal plane, and reducing the risk of dislocation during movement.

[0020] Such as Figure 3 、 Figure 4 As shown, a spring 53 is fixed between the two movably connected rods 52, and a positioning screw rod 512 is threadedly connected to the redirecting arm 50; The spring 53 is segmented and positioned by the positioning screw rod 512. When the spring 53 is positioned by the positioning screw rod 512, the two movably connected rods 52 slide independently. When the positioning screw rod 512 is inserted into different positions of the spring 53, the elastic rebound forces of the two movably connected rods 52 are different, so as to adjust the rebound force when the two movably connected rods 52 slide relative to each other, so that the two shoulders are pulled under non-uniform forces, thereby accurately adjusting the difference in the return spring forces of the two movably connected rods 52. This non-uniform traction force can simulate the actual force differences of the muscle groups around the shoulder joint (such as the uneven tension between the anterior and posterior bundles of the deltoid muscle), promoting the recovery of muscle coordination; When the positioning screw 512 is disengaged from the spring 53, the two movable rods 52 cooperate with each other and slide to adjust under the connection of the spring 53. When the upper movable rod 52 swings downward, it presses the spring 53. The elastic resilience of the spring 53 forces the lower movable rod 52 to move downward and reach the critical position (that is, when the deflecting arm 50 is in a horizontal state). The lower movable rod 52 moves upward, and the upper movable rod 52 moves downward. The movable rods 52 of the two arms interact alternately; Finally, by inserting the positioning screw 512 into the spring 53 at different positions, the different configurations of the elastic resilience of the spring 53 can form a dynamic balance of the two shoulder joints during traction, avoid the generation of transverse shear force on the glenohumeral joint caused by unilateral over-stretching, reduce the risk of cartilage wear. At the same time, the elastic deformation of the spring 53 disperses energy to prevent the ligament from being overloaded instantaneously.

[0021] Such as Figure 6 - Figure 7 As shown, in order to meet more usage requirements of users, a plurality of leaf springs 56 are fixed to the end of the movable rod 52 away from the spring 53, and a swing rod 520 is fixed to the end of the leaf spring 56 away from the movable rod 52; The pulling rope 30 is detachably installed on the swing rod 520, and the swing rod 520 is detachably installed on the movable rod 52; Among them, when the swing rod 520 is fixed to the movable rod 52, the swing rod 520 swings along with the movable rod 52, that is, the movable rod 52 makes a normal arc movement trajectory at this time; When the swing rod 520 is disassembled from the movable rod 52 and the shaft rod 54 is fixed on the angle adjusting seat 40, and at the same time the movable rod 52 is in a horizontal state, and there is a surplus of the pulling rope 30 above the swing rod 520. Therefore, when the user pulls vertically with both arms, through the elastic deformation of the leaf spring 56, the shaft rod 54 and the angle adjusting seat 40 form a stable fulcrum, ensuring that the length of the traction arm (from the shaft rod 54 to the action point of the pulling rope 30) is constant. This design conforms to the principle of lever balance, can avoid the sudden change of traction force caused by the fluctuation of the force arm, and improve the linear controllability of the shoulder joint force; The leaf spring 56 undergoes elastic deformation during vertical pulling, and its deformation amount is positively correlated with the pulling force. This non-linear resistance characteristic enables the muscle groups around the shoulder joint (such as the deltoid muscle and the rotator cuff muscle group) to bear a smaller load in the initial stage, and gradually increases the stimulation intensity as the pulling amplitude increases, realizing the synchronous improvement of muscle strength and joint range of motion, and realizing the progressive load adaptation of the shoulder joint from low to high during traction.

[0022] Such as Figure 3 、 Figure 4As shown, the redirecting arm 50 further includes a support tube 51. A spring 53 is disposed within the support tube 51. Two ends of the spring 53 are respectively fixed to one end of two movable rods 52 that is away from the leaf spring 56. The movable rods 52 are slidably inserted into the support tube 51. A shaft rod 54 is fixed at the middle position of the support tube 51; A vertically arranged support column 11 is fixed on the support frame 10. The angle adjustment base 40 includes a sleeve 41 sleeved on the support column 11. A first locking screw 411 that abuts against the support column 11 is threadedly connected to the sleeve 41. The sleeve 41 slides and adjusts along the support column 11 to adjust the height of the redirecting arm 50. And by fixing a horizontally arranged shaft sleeve 42 on the sleeve 41, the shaft rod 54 is rotatably arranged within the shaft sleeve 42 through a bearing to achieve the adjustment of the height between the redirecting arm 50 and the angle adjustment base 40.

[0023] As Figure 4 、 Figure 7 As shown, a long screw 57 threadedly connected to the movable rod 52 is inserted into the swing rod 520. When the long screw 57 is disengaged from the movable rod 52, the leaf spring 56 can be used at this time. When the long screw 57 is threadedly fixed to the movable rod 52, the swing rod 520 and the movable rod 52 are fixed at this time. A rope passing hole 521 is formed in the swing rod 520. The pulling rope 30 passes through the rope passing hole 521 and is then fixed by a third locking screw 55 threadedly connected to one end of the swing rod 520 and having a rubber pad that abuts against the pulling rope 30. Under the action of extrusion and / or friction force of the rubber pad, the swing rod 520 after adjusting the height can be fixed to the pulling rope 30, and the pulling rope 30 is prevented from being damaged by extrusion under the action of the rubber pad.

[0024] As Figure 3 、 Figure 4 As shown, one end of the movable rod 52 away from the leaf spring 56 is fixed with a bolt 522 with a nut 523. Strip-shaped holes 511 are symmetrically formed on the support tube 51. The bolt 522 passes through and slides along the strip-shaped holes 511. The nut 523 is larger than the width of the strip-shaped holes 511. Through the threaded connection between the nut 523 and the bolt 522, the movable rod 52 after adjusting the position is fixed to the support tube 51 under the action of extrusion and / or friction force of the nut 523 on the support tube 51.

[0025] As Figure 2 、 Figure 3 、 Figure 4As shown, a second locking screw 421 that abuts against the shaft rod 54 is threadedly connected to the shaft sleeve 42, and a plurality of positioning grooves 541 corresponding to and adapted to the second locking screw 421 are annularly formed on the shaft rod 54. When the second locking screw 421 is screwed and inserted into the corresponding positioning groove 541, the deflecting arm 50 can be fixed at a certain angle. At the same time, after the positioning screw 512 is disengaged from the spring 53, the movable rod 52 can slide within the support tube 51 at this time, and under the action of the spring 53, the shoulder is pulled at a certain angle in multiple directions (oblique pull and horizontal pull); During oblique or horizontal pulling, the spring 53 can automatically compensate for the displacement differences of the two movable rods 52 on both sides, maintain the movement coordination between the scapula and the humerus, and avoid winged scapula caused by excessive unilateral pulling.

[0026] As Figure 1 shown, a plurality of positioning holes corresponding to the first locking screw 411 are formed on the support column 11. When the first locking screw 411 is screwed into the positioning hole, the fixing reliability of the sleeve 41 and the support column 11 can be improved.

[0027] Working principle: The user adjusts the height of the deflecting arm 50 and / or the distance between the two handles 31 as needed; Arc movement trajectory state: At this time, the movable rod 52 is fixed on the support tube 51 through the cooperation of the bolt 522 and the nut 523. The long screw 57 is threadedly connected to the movable rod 52. The shaft rod 54 is rotatably arranged on the shaft sleeve 42. At this time, the user can reciprocally pull up and down with both hands holding the two handles 31 respectively; Arc movement trajectory and oblique pull state: Loosen the nut 523, the movable rod 52 can slide within the support tube 51, and the spring 53 automatically compensates for the displacement differences of the two movable rods 52 on both sides. In this state, when the positioning screw 512 is screwed into the spring 53 and when the amounts of the spring 53 at both ends of the positioning screw 512 are different, the two shoulders are pulled with non-uniform acting forces when obliquely pulling simultaneously in the arc movement trajectory; Fixed-angle pulling state: Adjust the angle of the included angle "a" as needed, and fix the shaft rod 54 on the sleeve 41 through the second locking screw 421. Then, disengage the positioning screw 512 from the spring 53. At this time, the arm is obliquely pulled or horizontally dragged to perform directional oblique or horizontal pulling on the shoulder joint; Vertical pulling state: Adjust the included angle "a" to ninety degrees, then fix the shaft rod 54 on the sleeve 41 through the second locking screw 421. Subsequently, rotate the long screw 57 to disengage from the movable rod 52, and at the same time adjust the pulling rope 30 so that there is a reserve above the swing rod 520 to ensure the normal downward pull of the handle 31. Then, pull down with both arms.

[0028] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above-described exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic characteristics of the present invention. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present invention. Any reference signs in the claims should not be construed as limiting the claims involved.

[0029] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An automatic shoulder joint traction device, comprising a support frame (10), characterized in that: A fixed pulley (20) is fixed on the cross arm of the support frame (10), a pulling rope (30) is wound around the fixed pulley (20), an angle adjustment seat (40) is slidably provided on the support frame (10), a retractable and adjustable redirection arm (50) is rotatably connected to the angle adjustment seat (40) via a shaft (54), the redirection arm (50) comprises two elastically connected movable rods (52), and the pulling rope (30) is detachably mounted on the two movable rods (52); The angle adjustment seat (40) is height-adjustable along a trajectory set by the support frame (10) to adjust the height of the arm when in a pulling state; The distance between the handles (31) at both ends of the pulling rope (30) is adjusted via two movable rods (52) to adjust the swing arm area; When the two movable rods (52) are fixed, the redirection arm (50) is pulled back and forth by the handle (31) to swing around the shaft (54) as the axis, forming an arc motion trajectory that conforms to the range of motion of the shoulder joint; When the two movable rods (52) are elastically connected, the redirection arm (50) is pulled back and forth by the handle (31) to swing and slide around the shaft (54) as the axis, so as to achieve multi-angle oblique pulling of the shoulder joint in the process of arc motion trajectory.

2. The automatic shoulder joint stretching device according to claim 1, characterized in that: A spring (53) is fixed between the two movable rods (52), and a positioning screw (512) is threadedly connected to the redirecting arm (50); The spring (53) is positioned in sections via a positioning screw (512) to achieve adjustment of the rebound force and sliding state of the two movable rods (52); When the spring (53) is positioned by the positioning screw (512), the two movable rods (52) slide independently; When the positioning screw (512) is separated from the spring (53), the two movable rods (52) slide against each other.

3. The automatic shoulder joint stretching device according to claim 2, characterized in that: A plurality of leaf springs (56) are fixed to one end of the movable rod (52) away from the spring (53), and a swing rod (520) is fixed to one end of the leaf spring (56) away from the movable rod (52); The pulling rope (30) is detachably mounted on the swing rod (520), and the swing rod (520) is detachably mounted on the movable rod (52); When the swing rod (520) is fixed on the movable rod (52), the swing rod (520) swings along with the movable rod (52); when the swing rod (520) and the movable rod (52) are separated and the shaft rod (54) is fixed, the elastic deformation of the leaf spring (56) enables the shoulder joint to achieve progressive load adaptation from low to high during the pulling process.

4. The automatic shoulder joint stretching device according to claim 3, characterized in that: The redirecting arm (50) further comprises a support tube (51), the spring (53) is arranged in the support tube (51), the movable rod (52) is slidably inserted in the support tube (51), and the shaft rod (54) is fixed on the support tube (51); A support column (11) is fixed to the support frame (10), the angle adjustment seat (40) comprises a sleeve (41) sleeved on the support column (11), a first locking screw (411) abutting against the support column (11) is threadedly connected to the sleeve (41), a shaft sleeve (42) is fixed to the sleeve (41), and the shaft rod (54) is rotatably arranged in the shaft sleeve (42) via a bearing.

5. The automatic shoulder joint stretching device according to claim 3, characterized in that: The swing rod (520) is provided with a long screw rod (57) threadedly connected to the movable rod (52), the swing rod (520) is provided with a rope threading hole (521) for the pulling rope (30) to pass through, and the swing rod (520) is threadedly connected to a third locking screw rod (55) having a rubber pad at one end and abutting against the pulling rope (30).

6. The automatic shoulder joint stretching device according to claim 4, characterized in that: A bolt (522) with a nut (523) is fixed to one end of the movable rod (52) away from the leaf spring (56), and strip holes (511) are symmetrically opened on the support tube (51), and the bolt (522) passes through and slides along the strip holes (511).

7. The automatic shoulder joint stretching device according to claim 4, characterized in that: A second locking screw (421) is threadedly connected to the shaft sleeve (42) and abuts against the shaft rod (54). The shaft rod (54) is provided with a plurality of positioning grooves (541) in an annular shape.

8. The automatic shoulder joint stretching device according to claim 4, characterized in that: The support column (11) is provided with a plurality of positioning holes corresponding to the first locking screw (411).

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