Cervical spine rehabilitation training device

Abstract

This utility model relates to the field of medical device technology, specifically to a cervical spine rehabilitation trainer, comprising a first support for wearing on a patient's shoulder and a second support for wearing on a patient's head. The first support is rotatably connected to the second support via a rotating shaft mechanism. The second support is provided with multiple sound-emitting units, which are evenly distributed around the axis of the rotating shaft mechanism. The first support is provided with trigger units corresponding to the sound-emitting units. When the second support rotates relative to the first support, each sound-emitting unit sequentially contacts and triggers the trigger unit. This invention addresses the problem that existing rehabilitation training devices generally lack real-time angle monitoring and feedback functions, making it difficult for patients to grasp flexion / extension angles, affecting rehabilitation effects and potentially causing sports injuries.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, specifically to a cervical spine rehabilitation training device. Background Technology

[0002] Cervical flexion (looking down) and extension (looking up) are fundamental movements in cervical spine rehabilitation training, primarily used to improve cervical spine mobility, relieve muscle stiffness, and promote nutrient exchange in the intervertebral discs. Clinical studies have shown that precisely controlling the range of flexion and extension angles (e.g., flexion ≤ 50°, extension ≤ 60°) can avoid excessive traction on ligaments or compression of neurovascular structures.

[0003] Therefore, patients often use cervical spine rehabilitation training devices (such as mechanical limiters) to assist in rehabilitation training, which restrict the range of head movement through physical barriers or gear structures. However, existing devices generally lack real-time angle monitoring and feedback functions, making it difficult for patients to master the flexion / extension angles, affecting the rehabilitation effect and potentially causing sports injuries. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a cervical spine rehabilitation training device to solve the problem that existing rehabilitation training devices generally lack real-time angle monitoring and feedback functions, which makes it difficult for patients to master the flexion / extension angle, affects the rehabilitation effect, and may cause sports injuries.

[0005] This utility model is achieved through the following technical solution:

[0006] A cervical spine rehabilitation training device includes a first bracket for wearing on a patient's shoulder and a second bracket for wearing on a patient's head, wherein the first bracket is rotatably connected to the second bracket via a rotating shaft mechanism.

[0007] The second bracket is provided with multiple sound-generating units, which are evenly distributed around the axis of the rotating shaft mechanism;

[0008] The first bracket is equipped with a trigger unit corresponding to the sound-emitting unit. When the second bracket rotates relative to the first bracket, each sound-emitting unit contacts and is triggered in sequence.

[0009] Furthermore, the first support is U-shaped, with its closed end rotatably connected to the second support, and the closed end has a notch for the patient's head to extend out.

[0010] Furthermore, the second bracket includes a closed-loop connecting strip and an arc-shaped strip for supporting the connecting strip, wherein the plane of the arc-shaped strip is perpendicular to the plane of the connecting strip;

[0011] The rotating shaft mechanism includes two coaxial frustums and two rotating sleeves fitted around the two frustums and rotatably engaged. The two frustums are fixedly connected to the two ends of the arc strip at opposite ends, and the outer walls of the two rotating sleeves are fixedly connected to the first bracket.

[0012] Furthermore, the truncated cone has a threaded hole coaxial with the arc-shaped strip at one end, and a fastening bolt is provided on the outside of the rotating sleeve. The threaded end of the fastening bolt is inserted into the threaded hole and connected by threaded engagement, while the other end abuts against the end of the rotating sleeve facing away from the arc-shaped strip.

[0013] Furthermore, the sound-generating unit is an elastic sheet, and a plurality of elastic sheets are evenly arranged around the circumference of the frustum and are all parallel to the axis of the frustum.

[0014] One end of the elastic sheet is fixedly connected to the frustum, and the other end extends radially away from the frustum.

[0015] The triggering unit is a baffle plate. One end of the baffle plate is fixedly connected to one end of the rotating sleeve facing away from the arc-shaped strip, and the other end extends radially along the rotating sleeve towards the frustum, with the end located on the rotation trajectory of the elastic plate facing away from the frustum.

[0016] Furthermore, the rotating sleeve has a groove at one end facing away from the arc-shaped strip for accommodating the elastic sheet and the baffle.

[0017] Furthermore, multiple elastic sheets are spliced ​​together to form a fan-shaped structure, and limit strips are provided on the outer sides of the two edge elastic sheets;

[0018] One end of the limiting strip is detachably fixed to the inner wall of the groove, and the other end extends radially towards the frustum along the rotating sleeve, with the end located on the movement trajectory of the elastic plate towards the frustum.

[0019] Furthermore, the sum of the angles between the two elastic pieces at the edge and the two limiting strips is less than the central angle of the fan-shaped structure corresponding to the multiple elastic pieces, and the baffle is disposed at the middle of the angle between the two limiting strips facing the elastic pieces.

[0020] Furthermore, the outer circumference of the rotating sleeve is provided with a plurality of limiting holes adapted to the limiting strip, and the plurality of limiting holes are evenly arranged around the circumference of the rotating sleeve.

[0021] The limiting strip extends out of one of the limiting holes at one end of the truncated cone and is tightly fitted together.

[0022] Furthermore, the end face of the rotating sleeve facing away from the arc-shaped strip is engraved with angle scale lines corresponding to multiple limiting holes.

[0023] The beneficial effects of this utility model are as follows:

[0024] This cervical spine rehabilitation trainer, through the cooperation of a sound-generating unit and a trigger unit, provides real-time auditory feedback when the patient's head rotates to a specific angle. This helps the patient perceive the current angle of movement and reduces the risk of sports injuries. Because the sound-generating units are evenly arranged around the rotation center line, they can trigger sound prompts at different angles and positions, helping the patient control the range of flexion / extension and improving the accuracy of rehabilitation training.

[0025] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0026] Figure 1 This is a three-dimensional structural diagram of an embodiment of the present utility model;

[0027] Figure 2 This is an exploded view of an embodiment of the present utility model;

[0028] Figure 3 for Figure 2 Enlarged view of point A in the middle;

[0029] Figure 4 This is a top view of an embodiment of the present utility model;

[0030] Figure 5 Bit Figure 4 A cross-sectional view of BB.

[0031] In the diagram: 1. First support; 11. Notch; 2. Second support; 21. Connecting strip; 22. Arc strip; 31. Frustum; 311. Threaded hole; 32. Rotating sleeve; 321. Groove; 322. Limiting hole; 33. Fastening bolt; 4. Elastic sheet; 5. Baffle; 6. Limiting strip; 7. Angle scale line. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0034] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0035] In the above description of this utility model, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0036] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0037] Please see Figure 1-5 The present invention provides a technical solution: a cervical spine rehabilitation training device, comprising a first support 1 for wearing on the patient's shoulder and a second support 2 for wearing on the patient's head, wherein the first support 1 is rotatably connected to the second support 2 through a rotating shaft mechanism;

[0038] The second bracket 2 is provided with multiple sound-generating units, which are evenly distributed around the axis of the rotating shaft mechanism;

[0039] The first bracket 1 is provided with a trigger unit corresponding to the sound-emitting unit. When the second bracket 2 rotates relative to the first bracket 1, each sound-emitting unit contacts the trigger unit in sequence and is triggered.

[0040] In this solution, through the cooperation of the sound-generating unit and the triggering unit, when the patient's head turns to a specific angle, the triggering unit contacts the sound-generating unit and emits a sound signal, providing real-time auditory feedback to help the patient perceive the current angle of movement and reduce the risk of sports injury. Since the sound-generating units are evenly arranged around the rotation center line, they can trigger sound prompts at different angle positions to help the patient control the range of flexion / extension and improve the accuracy of rehabilitation training.

[0041] Among them, the first bracket 1 (shoulder fixation bracket): is worn on the patient's shoulder and can use an adjustable shoulder strap or a rigid support frame to ensure stable support;

[0042] Second bracket 2 (head fixation bracket): worn on the patient's head, it can be a headband or an adjustable headband, to ensure a close fit to the head and to rotate on the first bracket 1 with the movement of the head;

[0043] Rotating shaft mechanism: connects the first support 1 and the second support 2, allowing the second support 2 to flex (head down) and extend (head up) around the rotating shaft;

[0044] The sound-generating units (such as mechanical buzzers, reeds, or striking bells) are evenly distributed along the rotation trajectory of the second support 2, preferably 4 to 8, corresponding to different angles (such as one every 15° or 30°).

[0045] The trigger unit (such as a raised contact, a flexible metal sheet, or a lever) is fixed on the first bracket 1 and located in the movement path of the sound-generating unit. When the second bracket 2 rotates to a specific angle, the corresponding sound-generating unit contacts the trigger unit, emitting a sound prompt through mechanical collision or flicking.

[0046] The usage steps are as follows:

[0047] Step 1: The patient wears the first support 1 (fixed to the shoulder) and the second support 2 (fixed to the head);

[0048] Step 2: Slowly perform cervical flexion (head down) or extension (head up) exercises;

[0049] Step 3: When the movement reaches the set angle, the trigger unit and the sound unit make mechanical contact and emit a sound prompt, which the patient can use to adjust the range of motion.

[0050] Step 4: Repeat the training until the number of repetitions and angle range specified in the rehabilitation plan are completed.

[0051] In this embodiment: the first support 1 is U-shaped, the closed end of the first support 1 is rotatably connected to the second support 2, and the closed end is provided with a notch 11 for the patient's head to extend out.

[0052] In this plan, such as Figure 1As shown, the open end of the first bracket 1 faces downwards, and the dimensions of the patient's front and back sides are adapted to the opening size of the open end of the first bracket 1 (the first bracket 1 can move slightly on the patient's body after being worn). Soft padding materials (such as cotton, sponge, etc.) can be pasted on the inner surface of the first bracket 1 to improve wearing comfort. A notch 11 is opened in the center of the closed end, and the edge of the notch 11 is treated with soft edging to avoid friction on the neck skin, so that the patient's head can be extended from the notch 11.

[0053] In this embodiment: the second bracket 2 includes a closed-loop connecting strip 21 and an arc-shaped strip 22 for supporting the connecting strip 21, wherein the plane of the arc-shaped strip 22 is perpendicular to the plane of the connecting strip 21;

[0054] The rotating shaft mechanism includes two coaxial frustums 31 and two rotating sleeves 32 sleeved on the outside of the two frustums 31 and rotatably engaged. The two frustums 31 are fixedly connected to the two ends of the arc strip 22 at opposite ends, and the outer walls of the two rotating sleeves 32 are fixedly connected to the first bracket 1.

[0055] In this plan, such as Figure 2 As shown, clips are provided on the two inner sidewalls corresponding to both ends of the arc-shaped strip 22. When wearing the second bracket 2, the two clips fit against the patient's head (such as the temples or other relatively flat areas) to provide lateral support for the head. Since the arc-shaped strip 22 is connected to the first bracket 1 by rotating around the axis of the frustum 31 through the frustum 31 and the rotating sleeve 32, the lateral deflection (lateral flexion movement) of the head is restricted. The connecting strap 21 is put on the outside of the patient's head, so that the arc-shaped strip 22 can rotate with the patient's head to perform flexion and extension rehabilitation exercises smoothly. It is suitable for early postoperative cervical spine surgery, acute whiplash injury, and spinal cord type cervical spondylosis.

[0056] The connecting strap 21 consists of a hook and loop side and a loop side. The middle of the hook and loop side and the middle of the loop side are opposite to the two clips and are fixedly connected. By bonding the two ends of the hook and loop side to the two ends of the loop side, a closed loop structure is formed, which is suitable for patients with various head circumference sizes.

[0057] In this embodiment: the frustum 31 has a threaded hole 311 coaxial with the frustum 31 at one end facing away from the arc strip 22, and a fastening bolt 33 is provided on the outside of the rotating sleeve 32. The threaded end of the fastening bolt 33 is inserted into the threaded hole 311 and connected by threaded engagement, and the other end abuts against the end of the rotating sleeve 32 facing away from the arc strip 22.

[0058] In this plan, such as Figure 2 , 3As shown, the axial dimension of the frustum 31 is smaller than that of the rotating sleeve 32, allowing the frustum 31 to be fully embedded in the rotating sleeve 32. By driving the fastening bolt 33 to rotate on the arc-shaped strip 22, the distance between the fastening bolt 33 and the arc-shaped strip 22 can be adjusted. Therefore, the fastening bolt 33 and the arc-shaped strip 22 can jointly clamp the rotating sleeve 32, using friction to limit the relative rotation of the frustum 31 and the rotating sleeve 32, thus locking the first support 1 and the second support 2, allowing the patient to maintain the current flexion or extension angle, and assisting in rehabilitation training.

[0059] In this embodiment: the sound-generating unit is an elastic sheet 4, and a plurality of elastic sheets 4 are evenly arranged around the circumference of the frustum 31, and are all parallel to the axis of the frustum 31;

[0060] One end of the elastic sheet 4 is fixedly connected to the frustum 31, and the other end extends radially away from the frustum 31.

[0061] The triggering unit is a baffle 5. One end of the baffle 5 is fixedly connected to the end of the rotating sleeve 32 facing away from the arc-shaped strip 22, and the other end extends radially along the rotating sleeve 32 toward the direction close to the truncated cone 31, and the end is located on the rotation trajectory of the elastic piece 4 facing away from the truncated cone 31.

[0062] In this plan, such as Figure 5 As shown, the elastic plate 4 is made of metal material and has a certain elasticity and strength. During the process of the elastic plate 4 rotating and sliding over the baffle 5, the elastic plate 4 deforms and bends into an energy storage state. Its bending stress is lower than the yield strength and it is not easy to undergo plastic deformation. After sliding over the baffle, the elastic potential energy is released instantaneously, causing the elastic plate 4 to swing back and forth. The surface periodically compresses and expands the surrounding air. The vibration causes the air molecules to alternate between density and sparsity, forming sound waves, thus achieving the purpose of real-time auditory feedback.

[0063] Among them, multiple elastic sheets 4 can be set with different thicknesses. Using elastic sheets 4 of different thicknesses as sound generating units can achieve differentiated sound feedback. Based on different sounds, the relative position (bending or extension angle) of the frustum 31 and the rotating sleeve 32 can be determined.

[0064] like:

[0065] 0.1-0.3mm elastic sheet 4: When triggered, it vibrates at a high frequency (about 800-1500Hz) and emits a crisp high-pitched sound;

[0066] 0.4-0.6mm elastic sheet 4: low vibration frequency (about 300-600Hz), producing a dull bass sound.

[0067] A pitch gradient can be established through a stepped thickness design (such as 0.2 / 0.4 / 0.6mm) to achieve differentiated sound feedback.

[0068] In this embodiment: the rotating sleeve 32 has a groove 321 at one end facing away from the arc-shaped strip 22 for accommodating the elastic sheet 4 and the baffle 5.

[0069] In this plan, such as Figure 2 , 3 As shown, the elastic sheet 4 and the baffle 5 are embedded in the groove 321, and the outer wall of the rotating sleeve 32 can be used to support and protect the elastic sheet 4 and the baffle 5, reducing the probability of them being damaged by bumps.

[0070] In this embodiment: multiple elastic sheets 4 are spliced ​​together to form a fan-shaped structure, and limit strips 6 are provided on the outside of the two edge elastic sheets 4;

[0071] One end of the limiting strip 6 is detachably fixed to the inner wall of the groove 321, and the other end extends radially along the rotating sleeve 32 toward the frustum 31, with the end located on the movement trajectory of the elastic piece 4 facing the frustum 31.

[0072] In this design, the limiting strip 6 is used to limit the angle of rotation of the elastic sheet 4 within the groove 321 (the maximum angle of extension and buckling drive). The baffle 5 is positioned on the side of the two limiting strips 6 facing the elastic sheet 4; the two limiting strips 6 are a buckling limiting strip 6 and an extension limiting strip 6, respectively. The elastic sheet 4 can rotate in the following three states:

[0073] State 1: When one side of the fan-shaped structure abuts against the flexion limiting strip 6, the flexion angle cannot be increased further, that is, the patient's head moves to the maximum flexion angle;

[0074] State 2: When the plane on the other side of the fan-shaped structure abuts against the extension limit bar 6, the extension angle cannot be increased further, and the patient's head moves to the maximum extension angle;

[0075] State 3: There are gaps between the two side planes of the fan-shaped structure and the buckling limit strip 6 and the extension limit strip 6, which can freely adjust the buckling or extension angle.

[0076] By limiting the maximum angle of flexion and extension with two limiting strips 6, the patient's cervical spine is protected, reducing the probability of secondary cervical spine injury during rehabilitation training.

[0077] In this embodiment, the sum of the included angles between the two elastic pieces 4 and the two limiting strips 6 is less than the central angle of the fan-shaped structure corresponding to the multiple elastic pieces 4, and the baffle 5 is disposed at the middle of the included angle between the two limiting strips 6 facing the elastic piece 4.

[0078] In this solution, the sum of the included angles of the two elastic pieces 4 and the two limiting strips 6 is the range of angles in which the elastic piece 4 rotates within the groove 321. It is only necessary to set the baffle 5 at the middle of the included angle of the two limiting strips 6 facing the elastic piece 4. That is, during the rotation of the fan-shaped structure, the elastic piece 4 always slides past the position of the baffle 5, making a sound.

[0079] In this embodiment: the outer circular surface of the rotating sleeve 32 is provided with a plurality of limiting holes 322 that are adapted to the limiting strip 6, and the plurality of limiting holes 322 are evenly arranged around the circumference of the rotating sleeve 32;

[0080] The end of the limiting strip 6 facing away from the truncated cone 31 extends out of the rotating sleeve 32 through one of the limiting holes 322 and is tightly fitted together.

[0081] In this scheme, the limiting strip 6 is inserted into the limiting hole 322. The friction between them restricts the limiting strip 6 from sliding out naturally. When the elastic piece 4 abuts against the limiting strip 6, it can only apply a thrust to the limiting strip 6 in the circumferential direction of the rotating sleeve 32 (perpendicular to the direction of movement of the limiting strip 6), making it difficult to drive the limiting strip 6 out of the limiting hole 322.

[0082] The limit bar 6 can be inserted into the corresponding limit hole 322 according to actual usage needs (such as different stages of rehabilitation training) to change the maximum angle of flexion or extension, so that the trainer is adjustable.

[0083] In this embodiment: the end face of the rotating sleeve 32 facing away from the arc-shaped strip 22 is engraved with angle scale lines 7 corresponding to multiple limiting holes 322.

[0084] In this design, the angle scale line 7 is set to correspond with the limiting hole 322 so as to quickly read the angle of the limiting hole 322 relative to the neutral position of the cervical spine and assist in adjusting the position of the limiting strip 6.

[0085] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A cervical vertebra rehabilitation training device, characterized in that: It includes a first bracket (1) for wearing on the patient's shoulder and a second bracket (2) for wearing on the patient's head. The first bracket (1) is rotationally connected to the second bracket (2) through a rotating shaft mechanism; A plurality of sound generating units are provided on the second bracket (2), and the plurality of sound generating units are evenly distributed around the axis of the rotating shaft mechanism; A trigger unit corresponding to the sound generating unit is provided on the first bracket (1). When the second bracket (2) rotates relative to the first bracket (1), each sound generating unit sequentially contacts and triggers the trigger unit; The outer shape of the first bracket (1) is in the shape of a U-shaped plate. The closed end of the first bracket (1) is rotationally connected to the second bracket (2), and a notch (11) for the patient's head to extend out is provided at the closed end; The second bracket (2) includes a connecting band (21) in a closed-loop shape and an arc-shaped strip (22) for supporting the connecting band (21). The plane of the arc-shaped strip (22) is perpendicular to the plane of the connecting band (21); The rotating shaft mechanism includes two coaxial frustums (31) and two rotating sleeves (32) sleeved outside the two frustums (31) and in rotational fit. The two opposite ends of the two frustums (31) are respectively fixedly connected to the two ends of the arc-shaped strip (22), and the outer walls of the two rotating sleeves (32) are fixedly connected to the first bracket (1).

2. The cervical vertebra rehabilitation trainer according to claim 1, characterized in that: A threaded hole (311) coaxial with the frustum (31) is provided at one end of the frustum (31) facing away from the arc-shaped strip (22). A fastening bolt (33) is provided outside the rotating sleeve (32). The threaded end of the fastening bolt (33) is inserted into the threaded hole (311) and is connected by thread fit, and the other end abuts against one end of the rotating sleeve (32) facing away from the arc-shaped strip (22).

3. The cervical spine rehabilitation training device according to claim 1, characterized in that: The sound generating unit is an elastic sheet (4). The plurality of elastic sheets (4) are evenly arranged in the circumferential direction of the frustum (31) and are all parallel to the axis of the frustum (31); One end of the elastic sheet (4) is fixedly connected to the frustum (31), and the other end extends radially away from the frustum (31); The trigger unit is a stop piece (5). One end of the stop piece (5) is fixedly connected to one end of the rotating sleeve (32) facing away from the arc-shaped strip (22), and the other end extends radially towards the frustum (31) along the rotating sleeve (32), and the end part is located on the rotation trajectory of the end of the elastic sheet (4) facing away from the frustum (31).

4. The cervical spine rehabilitation training device according to claim 3, characterized in that: A groove (321) for accommodating the elastic sheet (4) and the stop piece (5) is provided at one end of the rotating sleeve (32) facing away from the arc-shaped strip (22).

5. The cervical spine rehabilitation training device according to claim 4, characterized in that: The plurality of elastic sheets (4) are spliced to form a fan-shaped structure, and limiting strips (6) are provided outside the two edge elastic sheets (4); One end of the limiting strip (6) is detachably fixedly connected to the inner wall of the groove (321), and the other end extends radially towards the frustum (31) along the rotating sleeve (32), and the end part is located on the movement trajectory of the end of the elastic sheet (4) facing the frustum (31).

6. The cervical spine rehabilitation training device according to claim 5, characterized in that: The sum of the included angles between the two edge elastic sheets (4) and the two limiting strips (6) is less than the central angle of the fan-shaped structure corresponding to the plurality of elastic sheets (4). The stop piece (5) is arranged in the middle of the included angle on the side of the two limiting strips (6) facing the elastic sheet (4).

7. The cervical spine rehabilitation training device according to claim 5, characterized in that: The outer circular surface of the rotating sleeve (32) is provided with a plurality of limiting holes (322) that are adapted to the limiting strip (6), and the plurality of limiting holes (322) are evenly arranged around the circumference of the rotating sleeve (32); The limiting strip (6) extends out of the rotating sleeve (32) through one of the limiting holes (322) at one end facing away from the truncated cone (31) and is tightly connected.

8. The cervical spine rehabilitation training device according to claim 7, characterized in that: The end face of the rotating sleeve (32) facing away from the arc strip (22) is engraved with angle scale lines (7) corresponding to multiple limiting holes (322).

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