Postoperative functional rehabilitation exercise device for elbow joint fracture

Abstract

The invention relates to the technical field of postoperative rehabilitation devices, and discloses an elbow joint fracture postoperative functional rehabilitation exercise device. An upper fixing cylinder is connected with a lower fixing cylinder through a first spring and a traction rope, and the outer side wall of the upper fixing cylinder is fixedly connected with a cylinder body with an opening in the lower end; the device further comprises a buffer assembly arranged in the cylinder and connected between the first spring and the traction rope, the buffer assembly comprises an upper support, a lower support, a plurality of sets of telescopic frames and a damping piece, the upper support and the lower support are slidably connected into the cylinder, a second spring is fixedly connected between the upper support and the lower support, and the elastic force of the second spring is larger than that of the first spring. The telescopic frames are evenly and symmetrically distributed between the upper support and the lower support, each telescopic frame comprises a first connecting rod hinged to the lower surface of the upper support and a second connecting rod hinged to the upper surface of the lower support, and the ends, close to each other, of the first connecting rods and the second connecting rods are hinged through hinged shafts. And an accident protection effect can be achieved in the use process of a patient.

Description

Technical Field

[0001] The invention relates to the technical field of postoperative rehabilitation devices, and in particular to a functional rehabilitation training device after a fracture of an elbow joint. Background Art

[0002] The elbow joint is located in the upper limb, between the upper arm and forearm. It is composed of the lower end of the humerus, the olecranon fossa of the ulna and the upper end of the radius. When there is obvious bone displacement after an elbow fracture, internal fixation surgery is usually used for treatment. Commonly used fixation devices include nails, plates, screws, etc., and external fixation is still used to assist treatment during the recovery stage. During the recovery process, in order to avoid muscle adhesion in the elbow joint, elbow stiffness, and reduced elbow bone flexibility, it is necessary to conduct gradual rehabilitation training on the fractured limb and trunk during the fixation period.

[0003] Since patients have different requirements for different impedance forces at different time periods, and the movements between the upper arm and the forearm during rehabilitation training need to be standardized, there are currently many elbow joint rehabilitation training devices that can adjust the impedance force and correct the training movements at the same time. Such elbow joint rehabilitation training devices usually include a semi-arc upper fixing cylinder that wraps the patient's upper arm, and a semi-arc lower fixing cylinder that wraps the patient's upper arm. The lower fixing cylinder and the upper fixing cylinder are hingedly arranged by a hinge. Usually, an adjustable elastic device connecting the upper and lower fixing cylinders is arranged on one side of the upper and lower fixing cylinders close to the hinge. The elastic device is usually a spring connected to the upper fixing cylinder and one end is connected to the spring. A traction rope is fixed with a spring and the other end is fixed to the lower fixed tube. The spring can adjust the distance between the spring and the lower fixed tube in the guide groove of the upper fixed tube, and the elastic force of the spring can be replaced to enable the patient to adjust different pre-tightening forces. When training the elbow joint, the patient wears the upper and lower fixed tubes on the upper arm and forearm respectively, and firmly connects them to the arm through the Velcro. At this time, the forearm is bent without rotating the upper arm itself, so that the traction rope is stretched and the spring is elastically deformed. The elastic force of the spring is used to provide pre-tightening impedance to the upper limb joint part, thereby achieving the effect of muscle training on the elbow joint.

[0004] However, when patients use existing rehabilitation exercise devices, when their forearms rotate to the critical position of joint elasticity and they feel pain and it is difficult to continue to provide the elastic tension of the impedance spring and the traction rope, the patients' forearms can easily be quickly pulled back and unfolded under the elastic reset of the spring and the traction rope, which aggravates the pain in the elbow joint and even damages the muscles and ligaments. Summary of the invention

[0005] The invention provides a functional rehabilitation training device for post-operative fracture of the elbow joint, which can play an effect of accidental protection during use by the patient.

[0006] The present invention provides a functional rehabilitation training device for postoperative fracture of the elbow joint, comprising an upper fixing cylinder and a lower fixing cylinder for wrapping the upper arm and the forearm of the patient, wherein the upper fixing cylinder is connected to the lower fixing cylinder via a first spring and a pulling rope, wherein the outer wall of the upper fixing cylinder is fixedly connected to a cylinder body with an opening at the lower end, wherein the first spring is placed in the cylinder body and one end of the first spring is fixedly connected to the upper end of the cylinder body, and further comprising a buffer assembly placed in the cylinder body and connected between the first spring and the pulling rope, wherein the buffer assembly comprises an upper support and a lower support, a plurality of telescopic frames, and a damping member, wherein the upper support and the lower support are both slidably connected to the cylinder body, wherein the other end of the first spring is fixedly connected to the upper end of the upper support, The pulling rope is fixedly connected to the lower support, and a second spring is fixedly connected between the upper support and the lower support. The elastic force of the second spring is greater than the elastic force of the first spring. When the second spring is in an initial state of non-expansion, the upper support is adjacent to the lower support. Multiple groups of telescopic frames are evenly and symmetrically distributed between the upper support and the lower support. The telescopic frame includes a first connecting rod hinged to the lower surface of the upper support and a second connecting rod hinged to the upper surface of the lower support. The ends of the first connecting rod and the second connecting rod that are close to each other are hinged through hinge shafts, and the damping member is connected to each hinge shaft. As the second spring elastically resets and drives the first connecting rod and the second connecting rod to retract, the damping member is in friction contact with the inner wall of the cylinder.

[0007] Preferably, a first telescopic rod is fixedly connected to the middle of the lower surface of the upper support, a telescopic end of the first telescopic rod extends downward and is fixedly connected to the upper surface of the lower support, and the second spring is sleeved outside the first telescopic rod.

[0008] Preferably, the extended parts of both ends of each hinge shaft are sleeved and fixedly connected with ear blocks extending outward, wherein a pair of opposite hinge shafts are connected by a horizontally extending second telescopic rod, and both ends of the second telescopic rod are fixedly connected to the corresponding two hinge shafts, and the damping member includes an elastic sleeve, which is sleeved and fixedly connected to the outside of each ear block, and as each hinge shaft moves outward to an extreme position, the elastic sleeve frictionally contacts with the inner wall of the cylinder.

[0009] Preferably, a plurality of third springs are fixedly connected between the upper support and the lower support, and the elastic force of the plurality of third springs is greater than the elastic force of the plurality of first springs.

[0010] Preferably, a rubber layer is provided on the outer wall of the elastic sleeve near each ear block.

[0011] Preferably, the outer surface of the rubber layer has the same curvature as the inner wall of the cylinder.

[0012] Preferably, the telescopic frames are in an even number of groups, and the lower surface of the upper support and the upper surface of the lower support are fixedly connected with a corresponding number of hinge supports corresponding to the number of groups of the telescopic frames.

[0013] Preferably, the outer rings of the upper support and the lower support are connected to a plurality of rubber rollers rolling against the inner wall of the cylinder along the circumferential direction, and at least two groups of rubber rollers are distributed along the axial direction on each of the upper support and the lower support.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: the lower end of the cylinder is opened, and the interior forms a slide groove for the upper support and the lower support to slide vertically; the upper support and the lower support are arranged horizontally; compared with the traditional first spring directly connected to the pulling rope, the present device can provide a buffer component to provide a buffer protection effect on the patient's arm when the patient's forearm rotates to the critical position of the joint elasticity and feels pain and it is difficult to continue to provide the elastic tension of the impedance spring and the pulling rope. Specifically, when the patient is instantly pulled back by the first spring and the pulling rope, the second spring is arranged because it is stronger than the first spring. The elastic force is large, so the second spring contracts faster. When the second spring retracts first, it can drive multiple first connecting rods and corresponding second connecting rods to fold close to each other. At this time, multiple hinge shafts connected to the first connecting rods and the second connecting rods will simultaneously expand and move outward. At this time, the damping member connected to the hinge shaft gradually approaches the inner wall of the cylinder and finally contacts the inner wall of the cylinder. As the first spring continues to retract rapidly, each damping member increases the friction with the inner wall, thereby providing a buffering effect for the passive and rapid resetting of the patient's forearm, reducing the speed of the patient's forearm's straight rotation, thereby protecting the patient from accidents during exercise. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A schematic diagram of the structure of a functional rehabilitation training device for postoperative elbow fracture surgery provided by an embodiment of the present invention;

[0016] Figure 2 A schematic diagram of the internal cross-sectional structure of a functional rehabilitation training device for elbow joint fracture surgery provided by an embodiment of the present invention;

[0017] Figure 3 for Figure 2 A partial enlarged view of part A;

[0018] Figure 4 A partial structural schematic diagram of a functional rehabilitation training device for elbow joint fracture surgery provided by an embodiment of the present invention;

[0019] Figure 5 A partial structural schematic diagram of a functional rehabilitation training device for elbow joint fracture surgery provided by an embodiment of the present invention;

[0020] Figure 6 A schematic diagram of a portion of the structure from a top view of a functional rehabilitation training device for postoperative elbow fracture surgery provided by an embodiment of the present invention.

[0021] Description of reference numerals:

[0022] 1. Upper fixed cylinder; 2. Lower fixed cylinder; 3. First spring; 4. Pull rope; 5. Cylinder body; 6. Buffer assembly; 61. Upper support; 62. Lower support; 63. Second spring; 64. Telescopic frame; 641. First connecting rod; 642. Second connecting rod; 643. Hinge shaft; 65. Damping element; 651. Elastic sleeve; 652. Rubber layer; 7. First telescopic rod; 8. Ear block; 9. Second telescopic rod; 10. Third spring. DETAILED DESCRIPTION

[0023] A specific implementation of the present invention is described in detail below in conjunction with the accompanying drawings, but it should be understood that the protection scope of the present invention is not limited by the specific implementation.

[0024] In the description of the present invention, it is to be understood that the terms “center”, “longitudinal”, “lateral”, “length”, “width”, “thickness”, “up”, “down”, “front”, “back”, “left”, “right”, “vertical”, “horizontal”, “top”, “bottom”, “inside”, “outside”, “axial”, “radial”, “circumferential”, etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the technical solutions of the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0025] refer to Figure 1 , Figure 2 and Figure 4The present invention provides a functional rehabilitation training device for postoperative fracture of the elbow joint, comprising an upper fixing tube 1 and a lower fixing tube 2 for wrapping the patient's upper arm and forearm, and also comprising a first spring 3 connected to the upper fixing tube 1 and a pulling rope 4 connected to the first spring 3. The upper fixing tube 1 is connected to the lower fixing tube 2 through the first spring 3 and the pulling rope 4 respectively. The outer wall of the upper fixing tube 1 is fixedly connected with a cylinder 5 with an open lower end. The first spring 3 is placed in the cylinder 5 and one end is fixedly connected to the upper end of the cylinder 5. It also comprises a buffer component 6 placed in the cylinder 5 and connected between the first spring 3 and the pulling rope 4. The buffer component 6 comprises: an upper support 61 and a lower support 62, a plurality of telescopic frames 64, and a damping member 65. The upper support 61 and the lower support 62 are both slidably connected to the cylinder 5. The other end of the first spring 3 is fixedly connected to the upper end of the upper support 61. The ends are fixedly connected, the pulling rope 4 is fixedly connected to the lower support 62, and a second spring 63 is fixedly connected between the upper support 61 and the lower support 62. The elastic force of the second spring 63 is greater than the elastic force of the first spring 3. When the second spring 63 is in an initial state of not being extended, the upper support 61 is adjacent to the lower support 62, and multiple groups of telescopic frames 64 are evenly and symmetrically distributed between the upper support 61 and the lower support 62. The telescopic frame 64 includes a first connecting rod 641 hinged to the lower surface of the upper support 61 and a second connecting rod 642 hinged to the upper surface of the lower support 62. The ends of the first connecting rod 641 and the second connecting rod 642 that are close to each other are hinged through a hinge shaft 643, and the damping member 65 is connected to each hinge shaft 643. As the second spring 63 elastically resets and drives the first connecting rod 641 and the second connecting rod 642 to retract, the damping member 65 is in friction contact with the inner wall of the cylinder 5.

[0026] In the above embodiment, the lower end of the barrel 5 is opened, and the interior is a slide groove for the upper support 61 and the lower support 62 to slide vertically. The upper support 61 and the lower support 62 are arranged horizontally. Compared with the traditional first spring 3 directly connected to the pulling rope 4, the present device can provide a buffer component 6 to provide a buffer protection effect on the patient's arm when the patient's forearm rotates to the critical position of the joint elasticity and feels pain and it is difficult to continue to provide the elastic tension of the impedance spring and the pulling rope 4. Specifically, when the patient is instantly pulled back by the first spring 3 and the pulling rope 4, the second spring 63 is arranged because the elastic force of the second spring 6 is greater than that of the first spring 3, so the second spring 6 3, when the second spring 63 retracts first, it can drive the first connecting rods 641 and the corresponding second connecting rods 642 to fold and close together. At this time, the hinge shafts 643 connected to the first connecting rods 641 and the second connecting rods 642 will simultaneously move outward. At this time, the damping member 65 connected to the hinge shaft 643 gradually approaches the inner wall of the cylinder 5 and finally contacts the inner wall of the cylinder 5. With the continuous and rapid retraction of the first spring 3, the damping members 65 increase the friction with the inner wall, thereby providing a buffering effect for the passive and rapid reset of the patient's forearm, reducing the speed of the patient's forearm's straight rotation, thereby protecting the patient from accidents during exercise.

[0027] Specifically, when the first spring 3 and the second spring 63 are both in the initial state, the distance between the first connecting rod 641 and the second connecting rod 642 and the end portions is the smallest. When the patient is training, the second spring 63 will be stretched first, and the damping member 65 will be separated from the inner wall of the cylinder 5. At this time, the first spring 3 will be stretched synchronously so that it can be used normally. After stretching, the traction rope 4 will be bent around the hinge of the upper fixed cylinder 1 and the lower fixed cylinder 2. Specifically, the traction rope 4 can be one or more. The upper fixed cylinder 1 and the lower fixed cylinder 2 are fixed near the hinge to allow the traction rope 4 to pass through a guide ring. The traction rope 4 passes through the guide ring to avoid the traction rope 4 from being offset when the upper fixed cylinder 1 and the lower fixed cylinder 2 rotate. Since the design is conventional, the specific layout method is not specifically limited in this embodiment.

[0028] Further, refer to Figure 4 and Figure 5 A first telescopic rod 7 is fixedly connected to the middle of the lower surface of the upper support 61 , the telescopic end of the first telescopic rod 7 extends downward and is fixedly connected to the upper surface of the lower support 62 , and the second spring 63 is sleeved outside the first telescopic rod 7 .

[0029] In the above embodiment, the first telescopic rod 7 is provided to guide the relative sliding of the upper support 61 and the lower support 62, further restraining the upper support 61 and the lower support 62 from deflecting when sliding vertically, thereby ensuring the stability of the entire telescopic frame 64.

[0030] Further, refer to Figure 3 and Figure 6 The extended parts of both ends of each hinge shaft 643 are sleeved and fixedly connected with an outwardly extending ear block 8, wherein a pair of opposite hinge shafts 643 are connected by a horizontally extending second telescopic rod 9, and both ends of the second telescopic rod 9 are fixedly connected to the corresponding two hinge shafts 643, and the damping member 65 includes an elastic sleeve 651, which is sleeved and fixedly connected to the outside of each ear block 8. As each hinge shaft 643 moves outward to the extreme position, the elastic sleeve 651 is in frictional contact with the inner wall of the cylinder 5.

[0031] In the above embodiments, the elastic sleeve 651 can be set to simultaneously achieve the opening and contraction effects as the multiple ear blocks 8 expand and contract. The second telescopic rod 9 is set to cooperate with the elastic sleeve 651 to fix the orientation of the multiple ear blocks 8, thereby avoiding the ear blocks 8 from tilting or deflecting.

[0032] Further, refer to Figure 3 and Figure 6 A plurality of third springs 10 are fixedly connected between the upper support 61 and the lower support 62 , and the elastic force of the plurality of third springs 10 is greater than the elastic force of the plurality of first springs 3 .

[0033] In the above embodiment, multiple third springs 10 are provided to cooperate with the second spring 63 so that the physical force can sense the agility of the patient's forearm when the rotation speed is too fast. The third spring 10 and the second spring 63 will retract faster to control the elastic sleeve 651 to contact the inner wall of the cylinder 5 faster.

[0034] Further, refer to Figure 3 and Figure 5 A rubber layer 652 is provided on the outer wall of the elastic sleeve 651 near each ear block 8 , and the outer surface of the rubber layer 652 has the same curvature as the inner wall of the cylinder 5 .

[0035] In the above embodiments, by limiting the outer surface of the rubber layer 652 to have the same curvature as the inner wall of the cylinder 5 , the degree of fit with the inner wall of the cylinder 5 can be improved.

[0036] Further, refer to Figure 4 and Figure 5 The telescopic frames 64 are an even number of groups, and the lower surface of the upper support 61 and the upper surface of the lower support 62 are fixedly connected with a corresponding number of hinge supports corresponding to the number of groups of the telescopic frames 64.

[0037] In the above embodiment, by limiting the telescopic frame 64 to an even number group, stability can be ensured to improve stability during operation.

[0038] Further, refer to Figure 3 The outer rings of the upper support 61 and the lower support 62 are connected to a plurality of rubber rollers rolling against the inner wall of the cylinder 5 along the circumferential direction, and there are at least two groups of rubber rollers distributed along the axial direction on each of the upper support 61 and the lower support 62.

[0039] In the above embodiments, the rubber rollers are provided to improve the smoothness of the movement of the upper support 61 and the lower support 62 .

[0040] The above disclosures are only several specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A functional rehabilitation training device for postoperative fracture of the elbow joint, comprising a first spring (3) connected to an upper fixing cylinder (1) and a pulling rope (4) connected to the first spring (3), characterized in that: The outer wall of the upper fixed cylinder (1) is fixedly connected to a cylinder body (5) with an opening at the lower end, the first spring (3) is placed in the cylinder body (5) and one end of the first spring is fixedly connected to the upper end of the cylinder body (5), and also includes a buffer component (6) placed in the cylinder body (5) and connected between the first spring (3) and the pulling rope (4), the buffer component (6) comprising: The upper support (61) and the lower support (62) are both slidably connected in the cylinder (5); the other end of the first spring (3) is fixedly connected to the upper end of the upper support (61); the pulling rope (4) is fixedly connected to the lower support (62); and a second spring (63) having a greater elastic force than the first spring (3) is fixedly connected between the upper support (61) and the lower support (62); A plurality of telescopic frames (64) are evenly and symmetrically distributed between the upper support (61) and the lower support (62), the telescopic frames (64) comprising a first connecting rod (641) hinged to the lower surface of the upper support (61) and a second connecting rod (642) hinged to the upper surface of the lower support (62), and the ends of the first connecting rod (641) and the second connecting rod (642) close to each other are hinged via a hinge shaft (643); The damping member (65) is connected to each hinge shaft (643), and as the first connecting rod (641) and the second connecting rod (642) retract, the damping member (65) is in frictional contact with the inner wall of the cylinder (5).

2. The functional rehabilitation training device for elbow joint fracture after surgery as claimed in claim 1, characterized in that: A first telescopic rod (7) is fixedly connected to the middle of the lower surface of the upper support (61), the telescopic end of the first telescopic rod (7) extends downward and is fixedly connected to the upper surface of the lower support (62), and the second spring (63) is sleeved outside the first telescopic rod (7).

3. A functional rehabilitation training device for postoperative elbow fracture according to claim 1 or 2, characterized in that: The protruding parts of both ends of each hinge shaft (643) are sleeved and fixedly connected with an ear block (8) extending outward, wherein a pair of opposite hinge shafts (643) are connected via a second telescopic rod (9) extending horizontally, and both ends of the second telescopic rod (9) are fixedly connected to the corresponding two hinge shafts (643). The damping member (65) comprises an elastic sleeve (651), and the elastic sleeve (651) is sleeved and fixedly connected to the outside of each ear block (8). When each hinge shaft (643) moves outward to an extreme position, the elastic sleeve (651) is in frictional contact with the inner wall of the cylinder (5).

4. The functional rehabilitation training device for postoperative elbow fracture according to claim 3, characterized in that: A plurality of third springs (10) are fixedly connected between the upper support (61) and the lower support (62), and the elastic force of the plurality of third springs (10) is greater than the elastic force of the plurality of first springs (3).

5. The functional rehabilitation training device for postoperative elbow fracture according to claim 3, characterized in that: A rubber layer (652) is provided on the outer wall of the elastic sleeve (651) near each ear block (8).

6. The functional rehabilitation training device for postoperative elbow fracture according to claim 5, characterized in that: The outer surface of the rubber layer (652) has the same curvature as the inner wall of the cylinder (5).

7. The functional rehabilitation training device for postoperative elbow fracture according to claim 1, characterized in that: The telescopic frames (64) are in an even number of groups, and the lower surface of the upper support (61) and the upper surface of the lower support (62) are fixedly connected with a corresponding number of hinge supports corresponding to the number of groups of the telescopic frames (64).

8. The functional rehabilitation training device for postoperative elbow fracture according to claim 1, characterized in that: The outer rings of the upper support (61) and the lower support (62) are connected to a plurality of rubber rollers that roll with the inner wall of the cylinder (5) along the circumferential direction, and at least two groups of rubber rollers are distributed along the axial direction on each of the upper support (61) and the lower support (62).

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