Postoperative straight leg lifting training device for thoracolumbar vertebra

Abstract

The invention discloses a thoracolumbar spine postoperative straight leg raising training device which comprises a rack and an ankle fixing mechanism installed on the rack and used for fixing the ankle of a patient, a winding mechanism is installed on the rack, and a flexible traction part is arranged between the winding mechanism and the ankle fixing mechanism. The winding mechanism rotates to drive the ankle fixing mechanism to ascend and descend through the flexible traction part, a limiting shaft is further transversely and rotationally installed on the rack and located between the winding mechanism and the ankle fixing mechanism in the vertical direction, and the flexible traction part abuts against the side face of the limiting shaft in the process that the straight legs of a patient ascend or descend. The limiting shaft is used for limiting the highest position for lifting the straight leg of the patient; and the position of the limiting shaft on the rack can be adjusted. According to the thoracolumbar spine post-operation straight leg lifting training device, through the arrangement of the limiting shaft, the lifting height of a patient in the straight leg lifting training process can be conveniently limited, the safety performance is improved, and discomfort of the patient caused by misoperation is avoided.

Description

Technical Field

[0001] The invention relates to the technical field of medical rehabilitation training devices, in particular to a straight leg raising training device after thoracic and lumbar surgery. Background Art

[0002] Straight leg raising training is usually required after thoracic and lumbar surgery. Straight leg raising training generally requires the patient to lie flat on the bed with the knees straight and the thighs raised with the hip joint as the center, forming a certain angle with the bed or lifting it a certain distance from the bed. The specific degree of raising is based on the patient's acceptable level. The muscles in the front of the thigh (mainly the quadriceps femoris) are tightened and straightened for a certain period of time, and then slowly lowered.

[0003] At present, patients can generally be trained to raise their ankles by nurses, or by using existing lifting trainers, which generally include ankle fixing mechanisms, traction ropes, drive members, and pulleys, as in the training device disclosed in the application number: 202310119202.7, named "straight leg raising trainer", and the authorization announcement number: CN213666546U, named "a straight leg raising rehabilitation training device for orthopedics". The traction rope is driven by the drive member to drive the ankle fixing structure to rise or fall, thereby achieving the straight leg raising training of the patient.

[0004] However, in existing straight leg raising training equipment, a driving member is required to control the angle of leg training, and the patient is required to manually control the driving mechanism to drive the traction rope to rise each time training. If the user operates too late or too early, the patient's training results may be poor.

[0005] Therefore, there is an urgent need for a straight leg raising training device that can ensure that the patient's leg raising height is the same each time during straight leg training and the patient's straight leg training height is adjustable. Summary of the invention

[0006] In order to solve the technical problems existing in the background technology, the present invention provides a straight leg raising training device after thoracolumbar surgery.

[0007] The present invention provides a post-operative straight leg raising training device for thoracolumbar spine surgery, comprising a frame and an ankle fixing mechanism installed on the frame for fixing the ankle of a patient, a winding mechanism installed on the frame, a flexible traction portion provided between the winding mechanism and the ankle fixing mechanism, the winding mechanism rotates to drive the ankle fixing mechanism to rise and fall through the flexible traction portion, a limit shaft is also installed on the frame for transverse rotation, the limit shaft is located between the winding mechanism and the ankle fixing mechanism in the vertical direction, when the patient performs straight leg raising or straight leg lowering, the flexible traction portion contacts the side of the limit shaft, and the limit shaft is used to limit the highest position of the patient's straight leg raising;

[0008] The position of the limiting shaft on the frame is adjustable.

[0009] Preferably, a control switch is provided on the limit shaft, and when the flexible traction portion drives the patient's legs to be lifted to a set highest position, the control switch controls the winding mechanism to stop moving.

[0010] Preferably, when the ankle of the patient rises to a preset maximum height, the limiting axis contacts the leg or foot of the patient.

[0011] Preferably, the limit shaft is rotatably mounted on a support frame, the support frame is mounted on a frame, and the control switch is mounted on the support frame.

[0012] Preferably, when the patient's legs are lifted to a set highest position, the limiting axis is located above the patient's legs and is not in direct contact with the patient.

[0013] Preferably, when the patient's legs are raised or lowered, the limit axis is close to the head of the lying patient relative to the ankle fixing mechanism, and when the part of the flexible traction part connected to the ankle fixing mechanism located below the limit axis is in a vertical state, the control switch controls the winding mechanism to stop moving.

[0014] Preferably, when the patient's legs are lifted and lowered, the limiting axis is located between the ankle fixing mechanism and the winding mechanism both in the horizontal direction and in the vertical direction.

[0015] Preferably, the axis of rotation of the limit shaft changes with the contact position of the limit shaft and the flexible traction part, and also includes a rotation eccentric friction switch, the rotation eccentric friction switch includes a fixed shaft installed on the frame, the lower half of the fixed shaft is a first contact part, and also includes a rotating part that is sleeved outside the fixed shaft and installed on the limit shaft, the through hole of the rotating part is larger than the axis of the fixed shaft, and the rotating part has a second annular contact part, and when the patient's legs rise or fall, the first contact part of the fixed shaft contacts the second contact part of the rotating part; when the flexible traction part located below the limit shaft is in a vertical state, the first contact part of the fixed shaft is separated from the second contact part of the rotating part.

[0016] Preferably, the limiting shaft includes a middle mounting shaft which is laterally detachably mounted on the frame and a rotating sleeve which is sleeved outside the middle mounting shaft, the fixed shaft is mounted on the mounting shaft and is coaxial with it and has the same outer diameter as it, the rotating part is mounted on the rotating sleeve, and the inner diameter of the rotating part is equal to the inner diameter of the rotating sleeve, the through hole of the rotating sleeve is larger than the outer diameter of the mounting shaft, the flexible traction part is in contact with the rotating sleeve, and the axis of rotation of the rotating sleeve relative to the frame changes with the contact position of the flexible traction part with the rotating sleeve.

[0017] Preferably, the flexible traction portion is a traction belt, an annular groove is formed on the outside of the rotating sleeve, and the flexible traction portion contacts the rotating sleeve in the annular groove.

[0018] In the present invention, the proposed straight leg raising training device for thoracolumbar spine surgery facilitates the limitation of the raising height of the patient during the straight leg raising training process through the setting of the limiting axis, improves the safety performance, and avoids discomfort to the patient due to operating errors.

[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention;

[0021] Figure 2 This is a schematic structural diagram of a limit shaft according to a first embodiment of the present invention;

[0022] Figure 3 This is a structural diagram of Embodiment 2 of the present invention;

[0023] Figure 4 This is a schematic diagram of the limit axis structure of the second embodiment of the present invention;

[0024] In the figure: 1. frame; 2. ankle fixing mechanism; 3. flexible traction part; 4. winding mechanism; 5. limit shaft; 50. mounting shaft; 51. rotating sleeve; 510. ring groove; 6. control switch; 7. support frame; 8. rotating eccentric contact switch; 80. fixed shaft; 800. first contact part; 81. rotating part; 810. second contact part; 9. housing; 10. conductive ring. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar symbols throughout represent the same or similar elements or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0026] like Figure 1-Figure 2 The straight leg raising training device after thoracic and lumbar spine surgery shown in the figure comprises a frame 1, an ankle fixing mechanism, a flexible traction part 3 and a winding mechanism 4, wherein:

[0027] The ankle fixing mechanism 2 is sleeved on the outside of the patient's ankle, one end of the flexible traction part 3 is fixed on the ankle fixing mechanism 2, the flexible traction part 3 can be a traction rope or traction belt in the prior art, the other end of the flexible traction part 3 is installed on the winding mechanism 4, the winding mechanism 4 is installed on the frame 1, the winding mechanism 4 rotates to change the length of the flexible traction part 3 and then drives the patient's ankle upward to achieve the straight leg raising of the patient; specifically, the winding mechanism 4 includes a winding wheel and a driving member, the winding wheel is installed on the frame 1 for transverse rotation, the driving member is installed on the frame 1 and is used to drive the winding wheel to rotate, and the end of the flexible traction part 3 away from the ankle fixing mechanism 2 is fixed on the winding wheel;

[0028] It should be noted that the ankle fixing mechanism 2 can be a clamping ring structure in the prior art or other structures that can fix the ankle of the patient;

[0029] The difference from the prior art is that a limit shaft 5 is also installed on the frame 1 for horizontal rotation, and the limit shaft 5 is located between the winding mechanism 4 and the ankle fixing mechanism 2. When the flexible traction part 3 drives the ankle to move upward, the flexible traction part 3 bypasses the limit shaft 5 and is connected to the winding mechanism 4. That is, when the patient raises his legs straight or lowers his legs straight, the flexible traction part 3 conflicts with the side of the limit shaft 5, and the limit shaft 5 is used to limit the highest angle of the ankle raise.

[0030] In this embodiment, when the patient's ankle rises to a preset maximum height, the limiting shaft 5 contacts the patient's leg, that is, the ankle fixing mechanism 2 limits the patient's leg to prevent the patient's leg from being raised.

[0031] Preferably, a control switch 6 is also provided on the limit shaft 5, and the control switch 6 controls the action of the winding mechanism 4. When the patient's leg contacts the control switch 6 on the limit shaft 5, the control switch 6 controls the winding mechanism 4 to stop rotating and drives the flexible traction part 3 to stop winding on the winding wheel of the winding mechanism 4. After a certain period of time, the winding mechanism 4 rotates in the opposite direction to lengthen the length of the flexible traction part 3 between the winding mechanism 4 and the ankle fixing mechanism 2. It should be noted that a controller for controlling the action of the driving part of the winding mechanism 4 is also provided. The control switch 6 on the limit shaft 5 and the controller simultaneously control the action of the motor on the winding mechanism 4. The controller controls the driving motor of the winding mechanism 4 to rotate forward, reverse or stop.

[0032] Specifically, a support frame 7 is rotatably mounted on the outer side of the limiting shaft 5 , and the control switch 6 is mounted on the support frame 7 .

[0033] When the control switch 6 controls the driving motor to stop, the leg stays at this height for a certain period of time and then the driving motor rotates in the opposite direction, driving the leg to move downward under the action of the human leg's own gravity. In the process of the leg moving downward, due to the action of the flexible traction part 3, the patient can control the falling speed to be lower than the speed of the change in the length of the flexible traction part 3.

[0034] Specifically, the position of the limiting shaft 5 on the frame 1 can be adjusted, thereby achieving height adjustment for different patients or different recovery stages of the same patient.

[0035] like Figure 3-4 As shown, in some embodiments, the difference from the above embodiments is that when the patient's legs are lifted to the set highest position, the limit axis 5 is located above the patient's legs and does not directly contact the patient, thereby reducing the impact of the patient's legs to a certain extent and increasing the comfort of using the device.

[0036] During the process of raising or lowering the legs, the limiting axis 5 is close to the head of the lying patient relative to the ankle fixing mechanism, and the limiting axis 5 is horizontally located between the ankle fixing mechanism 2 and the winding mechanism 4. When the part of the flexible traction part 3 connected to the ankle fixing mechanism 2 located below the limiting axis 5 is in a vertical state, the winding mechanism 4 stops moving.

[0037] Preferably, the limiting shaft 5 is located between the ankle fixing mechanism 2 and the winding mechanism 4 in the vertical direction, and the winding mechanism 4 is located above the limiting shaft 5 .

[0038] The control switch 6 includes a rotating eccentric contact switch 8, which includes a fixed shaft 80 mounted on the support frame 7 of the frame 1, the lower half of the fixed shaft 80 is a first contact portion 800, and also includes a rotating portion 81 that is sleeved outside the fixed shaft 80 and mounted on the limit shaft 5, the through hole of the rotating portion 81 is larger than the axis of the fixed shaft 80, the rotating portion 81 has an annular second contact portion 810, the rotating portion 81 rotates with the limit shaft 5, and the axis of rotation of the limit shaft 5 is not fixed, the axis of rotation of the limit shaft 5 relative to the frame 1 and the axis of rotation of the rotating portion 81 relative to the fixed shaft 80 Overlap, when the patient's legs rise or fall, the first contact part 800 of the rotating part 81 contacts the second contact part 810 of the fixed shaft 80, and when the flexible traction part 3 located below the limit shaft 5 is in a vertical state, the first contact part 800 is separated from the second contact part 810 of the rotating part 81, and the first winding mechanism 4 stops rotating. After a certain period of time, the winding mechanism 4 drives the flexible traction part 3 to rotate in the opposite direction to make the patient's legs fall, thereby improving the safety performance, and the position of the limit shaft 5 and the position of the rotating eccentric resistance switch 8 can be adjusted, and then set according to the needs of different patients.

[0039] The first contact part 800 and the second contact part 810 can be conductive parts, and also include a conductive ring rotatably connected to the second contact part 810, the conductive ring does not rotate with the rotating part 81 and is connected to the second contact part 810, and the conductive ring and the first contact part 800 are both connected with conductive wires, which are connected to electric wires that control the rotation of the drive motor.

[0040] In order to facilitate electrical conduction, the second contact portion 810 is also rotatably connected to a conductive ring 10, which can rotate relative to the rotating portion 81, and further includes a shell 9 covering the conductive ring 10, and the shell 9 is connected to the support frame 7.

[0041] Specifically, preferably, the limiting shaft 5 includes a middle mounting shaft 50 which is detachably mounted on the frame 1 in a transverse direction and a rotating sleeve 51 which is sleeved outside the middle mounting shaft 50. The fixed shaft 80 is mounted on the mounting shaft 50 and is coaxial with it and has the same outer diameter as it. The rotating portion 81 is mounted on the rotating sleeve 51, and the inner diameter of the rotating portion 81 is equal to the inner diameter of the rotating sleeve 51. The through hole of the rotating sleeve 51 is larger than the outer diameter of the mounting shaft 50. When no external force is applied, the rotating sleeve 51 rotates under the action of gravity. The sleeve 51 is in line contact with the mounting shaft 50, the flexible traction portion 3 is wound around the outside of the rotating sleeve 51, and since the winding mechanism 4 is located above the limiting shaft 5 and on the side of the limiting shaft 5 away from the ankle fixing mechanism 2, that is, during the leg lifting process, the limiting shaft 5 is located horizontally between the ankle fixing mechanism 2 and the winding mechanism 4. Therefore, during the process of the flexible traction portion 3 driving the foot to lift, the flexible traction portion 3 has a portion in contact with the lower half of the rotating sleeve 51 away from the winding mechanism 4.

[0042] Preferably, the flexible traction portion 3 is a traction belt, and an annular groove 510 is formed on the outside of the rotating sleeve 51 , and the flexible traction portion 3 contacts the rotating sleeve 51 in the annular groove 510 .

[0043] Preferably, the mounting shaft 50 is fixed on the support frame 7, and the position of the support frame 7 on the frame 1 can be adjusted.

[0044] It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0045] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0046] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0048] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A post-operative straight leg raising training device for thoracic and lumbar spine surgery, comprising a frame (1) and an ankle fixing mechanism (2) mounted on the frame (1) for fixing the patient's ankle, a winding mechanism (4) being mounted on the frame (1), a flexible traction portion (3) being provided between the winding mechanism (4) and the ankle fixing mechanism (2), the winding mechanism (4) rotating through the flexible traction portion (3) driving the ankle fixing mechanism (2) to rise and fall, characterized in that: A limit shaft (5) is also installed on the frame (1) for transverse rotation. The limit shaft (5) is located between the winding mechanism (4) and the ankle fixing mechanism (2) in the vertical direction. When the patient performs straight leg raising or straight leg lowering, the flexible traction part (3) contacts the side of the limit shaft (5). The limit shaft (5) is used to limit the highest position of the patient's straight leg raising. The position of the limiting shaft (5) on the frame (1) can be adjusted.

2. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 1, characterized in that: A control switch (6) is provided on the limit shaft (5). When the flexible traction part (3) drives the patient's legs to be lifted to a set highest position, the control switch (6) controls the winding mechanism (4) to stop moving.

3. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 2, characterized in that: When the patient's ankle rises to a preset maximum height, the limiting shaft (5) contacts the patient's leg or foot.

4. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 3, characterized in that: The limit shaft (5) is rotatably mounted on a support frame (7), the support frame (7) is mounted on the frame (1), and the control switch (6) is mounted on the support frame (7).

5. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 2, characterized in that: When the patient's legs are lifted to a set highest position, the limiting shaft (5) is located above the patient's legs and does not directly contact the patient.

6. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 5, characterized in that: When the patient's legs are raised or lowered, the limit axis (5) is close to the head of the lying patient relative to the ankle fixing mechanism (2), and when the part of the flexible traction part (3) connected to the ankle fixing mechanism (2) located below the limit axis (5) is in a vertical state, the control switch (6) controls the winding mechanism (4) to stop moving.

7. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 6, characterized in that: The limiting axis (5) is located between the ankle fixing mechanism (2) and the winding mechanism (4) in the horizontal direction.

8. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 6, characterized in that: The axis of rotation of the limit shaft (5) changes with the contact position between the limit shaft (5) and the flexible traction part (3), and further comprises a rotation eccentric abutment switch (8), wherein the rotation eccentric abutment switch (8) comprises a fixed shaft (80) mounted on the frame (1), the lower half of the fixed shaft (80) being a first contact part (800), and further comprises a rotation part (81) sleeved outside the fixed shaft (80) and mounted on the limit shaft (5), the through hole of the rotation part (81) being larger than the through hole of the fixed shaft (80). The axis of the fixed shaft (80) is arranged on the rotating part (81), and the first contact part (800) of the fixed shaft (80) contacts the second contact part (810) of the rotating part (81) when the patient's legs are raised or lowered; when the flexible traction part (3) below the limiting shaft (5) is in a vertical state, the first contact part (800) of the fixed shaft (80) is separated from the second contact part (810) of the rotating part (81).

9. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 8, characterized in that: The limiting shaft (5) comprises a middle mounting shaft (50) which is detachably mounted on the frame (1) in a transverse direction and a rotating sleeve (51) which is sleeved outside the middle mounting shaft (50); the fixed shaft (80) is mounted on the mounting shaft (50) and is coaxial with the mounting shaft and has the same outer diameter; the rotating portion (81) is mounted on the rotating sleeve (51), and the inner diameter of the rotating portion (81) is equal to the inner diameter of the rotating sleeve (51); the through hole of the rotating sleeve (51) is larger than the outer diameter of the mounting shaft (50); the flexible traction portion (3) is in contact with the rotating sleeve, and the axis of rotation of the rotating sleeve (51) relative to the frame (1) changes as the contact position of the flexible traction portion (3) with the rotating sleeve changes.

10. The postoperative straight leg raising training device for thoracolumbar spine surgery according to claim 8, characterized in that: The flexible traction portion (3) is a traction belt, an annular groove (510) is formed on the outside of the rotating sleeve (51), and the flexible traction portion (3) contacts the rotating sleeve (51) in the annular groove (510).

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