A neck brace after thyroid surgery

Abstract

This invention relates to a post-thyroidectomy neck brace, comprising a wearable part and a limiting part. The wearable part includes a support plate and a pressure plate, with pressure plates connected to both the left and right ends of the support plate. The limiting part includes a connecting plate, a limiting sleeve, a limiting ring, and air bladders. A positioning plate is connected to the upper end of the connecting plate, and the positioning plate and the connecting plate are jointly connected to an angle adjustment device. The front end of the outer surface of the limiting sleeve has lugs, and through grooves are provided on the opposite sides of the two lugs. The limiting ring includes two semi-rings, each with a first, second, and third locking groove with outward openings in the middle of its outer peripheral wall. Two air bladders are bent into semi-circular arcs and connected to the two semi-rings. This invention is worn before surgery and used during and after surgery, limiting the neck of post-thyroidectomy patients while maintaining sufficient opening on the front of the neck, providing ample space for emergency assistance.

Description

Technical Field

[0001] This invention relates to the field of medical equipment technology, specifically to a neck brace after thyroid surgery. Background Technology

[0002] The thyroid gland is a very important gland in the human body, belonging to the endocrine system. The thyroid gland controls the rate at which energy is used, produces proteins, and regulates the body's sensitivity to other hormones. The thyroid gland relies on producing thyroxine to adjust these responses. Currently, in clinical practice, thyroid surgery requires patients to lie supine with a pillow under their back and their head tilted back to fully expose the thyroid region of the neck. Patients should maintain this position until the end of the surgery. After the surgery, in order to prevent infection of the wound or other complications, certain care should be taken for the wound.

[0003] After a patient undergoes thyroid surgery, their neck needs to be confined to prevent the wound from reopening due to head movement, which would hinder recovery. A neck brace is commonly used for post-thyroid surgery care. However, due to the 72-hour critical period after thyroid surgery, hospitals may even keep a tracheotomy kit at the patient's bedside. If symptoms such as bleeding, vomiting, and difficulty breathing occur during the critical period, emergency assistance is required, and a tracheotomy may be necessary.

[0004] Current neck braces are usually worn after surgery. Not only do they easily touch the patient's wound when worn, but they also tightly wrap the patient's neck, making it impossible to provide effective assistance in case of danger. The process of removing the neck brace can delay the opportunity for rescue. Therefore, current neck braces are not suitable for postoperative care after thyroid surgery. Summary of the Invention

[0005] To address the problem that existing neck braces are unsuitable for postoperative care after thyroid surgery, this invention provides a postoperative neck brace for thyroid surgery. The purpose is to allow patients to wear it before surgery and use it during and after the surgery. It restricts the neck of patients after thyroid surgery while maintaining sufficient openings on the front of the neck to provide enough space for emergency rescue.

[0006] To achieve the above objectives, the technical solution of the present invention is as follows:

[0007] A neck brace for thyroid surgery, comprising a wearing part and a limiting part;

[0008] The wearable part includes a support plate and a pressure plate, and the support plate is connected to the pressure plate at both the left and right ends;

[0009] The limiting part includes a connecting plate, a limiting sleeve and a limiting ring. The lower part of the connecting plate extends into the bearing plate. A positioning plate is hinged to the upper part of the connecting plate. An angle adjustment device is provided on the outer side of the hinge between the positioning plate and the rear side of the connecting plate.

[0010] There are two limiting sleeves, which are symmetrical from left to right. Each limiting sleeve is formed by a groove with an opening facing the center of the inner surface of an arc-shaped rod. The rear ends of the two limiting sleeves are respectively hinged to the left and right ends of the front side of the positioning plate, and the front ends of the two limiting sleeves are in contact to form an arc-shaped groove. The front ends of the grooves of the two limiting sleeves are connected.

[0011] Each of the limiting sleeves has a lug at its front end. A sleeve is fitted around the two lugs together. A through groove is provided on the opposite side of the two lugs. The two through grooves are joined together to form an adjusting threaded hole. A stud is screwed into the adjusting threaded hole. The front and rear ends of the stud extend out of the adjusting threaded hole. An adjusting handle is connected to the front end of the stud, and the rear end contacts the limiting ring.

[0012] The limiting ring is a circular ring formed by two semi-rings that are in contact with each other, with the outer ring extending into the groove and the inner ring located outside the groove.

[0013] Furthermore, the top surface of the support plate is provided with a connecting hole at its center, and the rear side surface of the support plate is provided with a plurality of positioning threaded holes that communicate with the connecting hole at intervals.

[0014] Furthermore, a first slot with an outward opening is provided in the middle of the outer peripheral wall of the semi-ring, a second slot is provided in the middle of the bottom surface of the first slot, and there is a gap between the left and right ends of the second slot and the left and right ends of the first slot, respectively. A third slot is provided in the middle of the bottom surface of the second slot, and there is a gap between the left and right ends of the third slot and the left and right ends of the second slot, respectively. The first slot, the second slot, and the third slot are all arc-shaped and concentric with the semi-ring. The third slot of the semi-ring located on the front side of the two semi-rings faces the adjusting threaded hole, and the rear end of the stud is located in the third slot.

[0015] Furthermore, an inclined connecting groove is provided at the intersection of the upper surface of the semi-ring and the inner ring surface. An airbag is fixedly connected in the connecting groove of each semi-ring, and the airbags on the two semi-rings contact each other to form a circular ring.

[0016] Furthermore, the pressure plate is provided with a strap and a connecting ring at both ends, with one end of the strap passing through the connecting ring to connect the two ends of the pressure plate.

[0017] Furthermore, the front side of the support plate is connected to an elastic pad, the left and right ends of the pad are aligned with the left and right sides of the support plate respectively, and the front surface of the pad is an arc-shaped surface with curved edges on the left and right sides and straight edges on the top and bottom sides.

[0018] Furthermore, the angle adjustment device includes a nut and two L-shaped screws. The front end of the horizontal section of the upper L-shaped screw is hinged to the middle of the rear side of the positioning plate, and the front end of the horizontal section of the lower L-shaped screw is hinged to the upper part of the rear side of the connecting plate. The vertical sections of the two L-shaped screws are coaxial and opposite to each other and connected by the nut. The external threads of the two L-shaped screws have opposite directions. The upper and lower parts of the inner circumferential wall of the nut are respectively provided with internal threads that match the external threads on the two L-shaped screws.

[0019] Furthermore, a compression spring is provided between the sleeve and the two limiting sleeves, which is fitted around the outer periphery of the two lugs. The compression spring presses the sleeve tightly against the rear side of the adjusting handle.

[0020] Furthermore, the upper surface of the lug inside the sleeve is provided with scale lines. There are three scale lines, which are named the first scale line, the second scale line, and the third scale line from back to front. When the rear end of the sleeve is aligned with the first scale line, the rear end of the stud is located in the third groove. When the rear end of the sleeve is aligned with the second scale line, the rear end of the stud is located in the second groove. When the rear end of the sleeve is aligned with the third scale line, the rear end of the stud is located in the first groove.

[0021] The beneficial effects of the present invention through the above technical solution are as follows:

[0022] This invention allows patients to wear the neck brace before surgery, thus avoiding the problems of pain and wound contact that can easily occur when wearing it after surgery.

[0023] This invention is equipped with an angle adjustment device that can limit the neck position and position the patient during surgery. This eliminates the need for patients to practice their surgical position a few days before surgery. Patients can wear this device directly during surgery and maintain a suitable surgical position throughout the entire procedure.

[0024] The present invention does not come into contact with the wound when being put on or taken off, and does not completely wrap the neck, but only wraps the area near the chin, fully exposing the surgical site. Therefore, it will not cause pain to the patient. At the same time, because the present invention leaves surgical operation space in front of and on both sides of the patient's neck, it is convenient to provide emergency assistance to the patient during the critical period after surgery, including tracheotomy and other hemostasis, pressure and other operations.

[0025] This invention restricts the patient's neck after surgery to prevent excessive neck movement that could damage the surgical incision. At the same time, as the patient gradually recovers, it provides the patient with a corresponding range of motion, allowing the patient to move their neck to a limited extent even without medical supervision, without damaging the surgical wound. Attached Figure Description

[0026] Figure 1 This is the front view of the present invention;

[0027] Figure 2 yes Figure 1 A cross-sectional view along line AA (excluding the airbag);

[0028] Figure 3 This is the right view of the present invention;

[0029] Figure 4 yes Figure 3 Enlarged view of part B;

[0030] Figure 5 This is a schematic diagram of the wearable part of the present invention (front view).

[0031] Figure 6 This is a schematic diagram of the wearable part of the present invention (rear view).

[0032] Figure 7 This is a schematic diagram of the structure of the limiting part of the present invention;

[0033] Figure 8 This is a right-section view of the limiting portion of the present invention;

[0034] Figure 9 This is a schematic diagram of the structure of the limiting sleeve of the present invention;

[0035] Figure 10 This is a schematic diagram of the semi-ring structure of the present invention;

[0036] The attached diagram is labeled as follows: 1. Bearing plate; 2. Pressure plate; 3. Strap; 4. Pad; 5. Connecting hole; 6. Positioning threaded hole; 7. Connecting ring; 8. Connecting plate; 9. Limiting sleeve; 10. Half ring; 11. Airbag; 12. Positioning plate; 13. Angle adjustment device; 14. Lug; 15. Through groove; 16. Stud; 17. Adjusting handle; 18. Sleeve; 19. First slot; 20. Second slot; 21. Third slot; 22. Transition plate; 23. Connecting groove; 24. Nut; 25. L-shaped screw; 26. Compression spring; 27. Scale line; 28. Slide groove; 29. ​​Hinge; 30. Air injection pipe. Detailed Implementation

[0037] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0038] It should be noted that the directional terms "front", "back", "left", "right", "up", "down", "bottom", and "top" used in the following description refer to the directions shown in the attached diagram, while the terms "inside" and "outside" refer to the directions toward or away from the geometric center of a specific component, respectively.

[0039] like Figures 1-10 As shown, a post-thyroidectomy neck brace includes a wearing part and a limiting part;

[0040] The wearable part includes a support plate 1, a pressure plate 2 and a strap 3. The support plate 1 is a rectangular plate. The left and right ends of the support plate 1 are connected to the pressure plate 2. The pressure plate 2 is an arc-shaped plate with an upward protrusion. The circles containing the two pressure plates 2 are coaxial. The rear parts of the opposite sides of the two pressure plates 2 are respectively fixedly connected to the lower ends of the left and right sides of the support plate 1.

[0041] The limiting part includes a connecting plate 8, a limiting sleeve 9, and a limiting ring. The lower part of the connecting plate 8 extends into the bearing plate 1. The upper end of the connecting plate 8 is hinged to a positioning plate 12 via a hinge 29. The positioning plate 12 is a rectangular plate. The length and width of the positioning plate 12 are the same as the length and width of the connecting plate 8. The height of the positioning plate 12 is less than the height of the connecting plate 8. The two leaf plates of the hinge 29 are respectively connected to the upper end of the rear side of the connecting plate 8 and the lower end of the rear side of the positioning plate. An angle adjustment device 13 is provided on the outer side of the hinge between the positioning plate 12 and the rear side of the connecting plate 8. The angle adjustment device 13 is used to adjust the angle between the connecting plate 8 and the positioning plate 12, that is, the tilt angle of the positioning plate 12, which is used to adjust the angle and position of the patient during surgery.

[0042] There are two limiting sleeves 9, which are identical in shape and size and symmetrical from left to right. Each limiting sleeve 9 is formed by a groove 28 with an opening facing the center of the circle on the inner surface of an arc-shaped rod. The height of each limiting sleeve 9 is 2-3 cm. The surface of the limiting sleeve 9 facing the center of the circle is the inner surface of the limiting sleeve 9, and the other surface is the outer surface of the limiting sleeve 9. The two limiting sleeves 9 are on the same circle. The rear ends of the two limiting sleeves 9 are respectively hinged to the left and right ends of the front side of the positioning plate 12. The front ends of the two limiting sleeves 9 are in contact to form a superior arc-shaped groove. The front ends of the grooves 28 of the two limiting sleeves 9 are connected and connected. The central angle of the superior arc-shaped groove is greater than 300°.

[0043] Each limiting sleeve 9 has a lug 14 on its outer surface front end. A sleeve 18 is fitted over both lugs 14. The sleeve 18 is a tubular body with a square cross-section. The sleeve 18 brings the two lugs 14 into contact, and the sleeve 18 slides back and forth along the central axis of the two lugs 14. The lugs 14 are rectangular prisms. Through grooves 15 are provided on the opposite sides of the two lugs 14. The front and rear ends of the through grooves 15 pass through the front and rear ends of the respective lugs 14, and the through grooves 15 and the sliding grooves 2 of the limiting sleeve 9 are connected. 8 are connected. The inner wall of the through groove 15 is provided with a semi-thread. After the two lugs 14 are connected, the semi-threads on the through grooves 15 on the two lugs are connected to form an integral internal thread. The through grooves 15 on the two lugs 14 are connected to form an adjusting threaded hole. A stud 16 is screwed into the adjusting threaded hole. The front and rear ends of the stud 16 extend out of the adjusting threaded hole respectively. The front end of the stud 16 is connected to an adjusting handle 17, and the rear end is in contact with a limiting ring. The adjusting handle 17 is a regular hexagon. The outer diameter of the sleeve 18 is smaller than the outer diameter of the adjusting handle 17.

[0044] The limiting ring is a circular ring formed by two semi-circular rings 10 in contact with each other. Both semi-circular rings 10 are semi-circular plates. The two semi-circular rings 10 are the same in shape and size and are symmetrical. The outer ring of the circular ring extends into the sliding groove 28 and is in sliding contact with the inner surface of the limiting sleeve 9, while the inner ring is located outside the sliding groove 28.

[0045] A connecting hole 5 is provided at the center of the top surface of the support plate 1. The connecting hole 5 is a rectangular countersunk hole that extends downward into the lower part of the support plate 1. A plurality of positioning threaded holes 6 are provided at intervals on the rear side of the support plate 1, which are connected to the connecting hole 5. The positioning threaded holes 6 are countersunk threaded holes, and the front end of the positioning threaded holes 6 is connected to the connecting hole 5. The connecting plate 8 is a vertical rectangular plate. The cross-sectional length and width of the connecting plate 8 correspond to the cross-sectional length and width of the connecting hole 5, respectively. The connecting plate 8 is screwed into the positioning threaded hole 6 and the countersunk screw that tightens the connecting plate 8 is limited. The depth of the countersunk hole of the positioning threaded hole 6 is greater than the head thickness of the countersunk screw. When the countersunk screw tightens the connecting plate 8, the head of the countersunk screw is located in the countersunk hole of the positioning threaded hole 6.

[0046] A first groove 19 with an outward opening is provided in the middle of the outer peripheral wall of the semi-ring 10. The first groove 19 is recessed towards the center of the semi-ring 10 and opens outward. A second groove 20 is provided in the middle of the bottom surface of the first groove 19. The second groove 20 is recessed towards the bottom surface of the first groove 19 and opens outward. There is a gap between the left and right ends of the second groove 20 and the left and right ends of the first groove 19, respectively. A third groove 21 is provided in the middle of the bottom surface of the second groove 20. The third groove 21 is recessed towards the bottom surface of the second groove 20 and opens outward. The left and right ends of the third slot 21 are spaced apart from the left and right ends of the second slot 20, respectively. The first slot 19, the second slot 20, and the third slot 21 are all arc-shaped concentric with the semi-ring 10. The bottom surfaces of the first slot 19, the second slot 20, and the third slot 21 are all close to the inner ring of the semi-ring 10. The openings of the first slot 19, the second slot 20, and the third slot 21 face outward toward the outer ring of the semi-ring 10. The third slot 21 of the semi-ring 10 located on the front side of the two semi-rings 10 faces the adjusting threaded hole. The rear end of the stud 16 is located inside the third slot 21.

[0047] The central angle of the third slot 21 on the semi-ring 10 is 60°, the central angle of the second slot 20 is 90°, and the central angle of the first slot 19 is 120°.

[0048] An inclined connecting groove 23 is provided at the intersection of the upper surface of the semi-ring 10 and the inner ring surface. The connecting groove 23 is an arc-shaped groove that is recessed into the semi-ring 10 and opens towards the center of the semi-ring 10. The two sides of the connecting groove 23 intersect the inner peripheral wall and the upper surface of the semi-ring 10, respectively. The two ends of the connecting groove 23 pass through the two ends of the semi-ring 10. An airbag 11 is fixedly connected in the connecting groove 23 of each semi-ring 10. The airbags 11 on the two semi-rings 10 contact each other to form a circular ring. The outer peripheral wall of the airbag 11 is connected to the arc-shaped surface of the connecting groove 23.

[0049] Both airbags 11 are hollow cylinders made of rubber. The two airbags 11 are bent into semicircles and connected to two semi-rings 10. The upper end of the airbag 11 is higher than the upper end of the limiting sleeve 9. Both airbags 11 are connected to an air injection tube 30 that is higher than the limiting sleeve 9, lower than the upper end of the airbag 11, and with the end facing outward. The air injection tube 30 is equipped with a shut-off valve.

[0050] The pressure plate 2 is provided with a tie 3 and a connecting ring 7 at both ends. The tie 3 is connected to the rear end face of the pressure plate 2, and the connecting ring 7 is provided on the front end face for the tie 3 to pass through. The tie 3 is a non-elastic strip, and the connecting ring 7 is a square ring. One end of the tie 3 passes through the connecting ring 7 to connect the two ends of the pressure plate 2.

[0051] The front side of the support plate 1 is connected to an elastic pad 4. The left and right ends of the pad 4 are aligned with the left and right sides of the support plate 1, respectively. The rear surface of the pad 4 is connected to the front surface of the support plate 1. The front surface of the pad 4 is an arc-shaped surface with curved edges on the left and right sides and straight edges on the top and bottom sides. The arc-shaped protrusion of the pad 4 faces forward. The pad 4 is used to support the neck to prevent the neck from being suspended in the air, which helps the patient maintain a tilted-back position during the operation.

[0052] The lower end of the bearing plate 1 is connected to a transition plate 22. The upper end face of the transition plate 22 has the same shape and size as the lower end face of the bearing plate 1. The front side of the transition plate 22 is a sloped surface with its lower end tilted backward. The lower end of the front side face of the transition plate 22 coincides with the lower end of the rear side face.

[0053] The angle adjustment device 13 includes a nut 24 and two L-shaped screws 25. Each L-shaped screw 25 has a horizontal section and a vertical section. The horizontal section of the upper L-shaped screw 25 is hinged at the front end to the middle of the rear side of the positioning plate 12 and at the rear end to the upper end of the vertical section of the upper L-shaped screw 25. The horizontal section of the lower L-shaped screw 25 is hinged at the front end to the upper part of the rear side of the connecting plate 8 and at the rear end to the lower end of the vertical section of the lower L-shaped screw 25. The vertical sections of the two L-shaped screws 25 are coaxial and connected by the nut 24. The external threads rotate in opposite directions. The nut 24 is a hexagonal prism with a central through hole. The upper and lower parts of the inner circumferential wall of the nut 24 are respectively provided with internal threads that correspond to the external threads on the two L-shaped screws 25. When the patient tilts their head back and rotates the nut 24, the vertical sections of the two L-shaped screws 25 are brought closer together. At this time, the distance between the horizontal sections of the two L-shaped screws 25 decreases. Because the upper end of the connecting plate 8 is hinged to the positioning plate 12 via the hinge 29, the connecting plate 8 and the positioning plate 12 form an angle. The angle between the connecting plate 8 and the positioning plate 12 fixes the angle of the patient's head tilting back.

[0054] A compression spring 26 is provided between the sleeve 18 and the two limiting sleeves 9, which is sleeved around the two lugs 14. The compression spring 26 presses the sleeve 18 against the rear side of the adjusting handle 17.

[0055] The upper surface of the lug 14 inside the sleeve 18 is provided with scale lines 27. There are three scale lines 27, which are the first scale line, the second scale line, and the third scale line from back to front. When the rear end of the sleeve 18 is aligned with the first scale line, the rear end of the stud 16 is located in the third slot 21. When the rear end of the sleeve 18 is aligned with the second scale line, the rear end of the stud 16 is located in the second slot 20. When the rear end of the sleeve 18 is aligned with the third scale line, the rear end of the stud 16 is located in the first slot 19. The rotation range of the limiting ring formed by the docking of the two half rings 10 is adjusted by rotating the stud 16 into the first slot, the second slot, or the third slot. That is, at a certain stage after the operation, the patient's head can rotate within a certain range without affecting the wound. This range is determined by the central angle of the first slot, the second slot, or the third slot.

[0056] The middle part of the tie 3 and the free end of the tie 3 are respectively provided with nylon fleece and nylon hook strap. Each tie 3 passes through the corresponding connecting ring 7 and is connected by nylon hook strap and nylon fleece.

[0057] There is a gap between the rear end of the circle containing the two semi-rings 10 and the positioning plate 12, that is, there is a gap between the rear end of the circle containing the groove 28 and the positioning plate 12, so that the semi-rings 10 do not contact the positioning plate 12 when rotating in the groove 28.

[0058] In use, the two pressure plates 2 press against the patient's shoulders, and the straps 3 are used to wrap around the patient's armpits and connecting rings 7 and are connected by nylon hooks and nylon fleece, so that the wearable part can be connected to the patient's shoulders. The pad 4 is located at the patient's neck, so that the front ends of the two limiting sleeves 9 of the limiting part are separated to the left and right. The connecting plate 8 is inserted into the connecting hole 5. The limiting sleeves 9 are lower than the patient's chin before the connecting plate 8 is fixed. The countersunk screw is screwed into the positioning threaded hole 6 to limit the connecting plate 8. Then the half ring 10 is installed, and the front ends of the two limiting sleeves 9 are connected by the sleeve 18. The height of the limiting part is adjusted so that the half ring 10 is slightly lower than the patient's chin when the airbag 11 is not inflated and presses against the patient's chin when the airbag 11 is inflated. At this time, the invention is worn on the patient.

[0059] Because this invention protects the patient's neck by applying pressure to the patient's jaw and shoulders, without completely wrapping the neck, and with padding at the back of the neck, the surgical site from the side to the front of the neck is fully exposed, leaving room for surgical operation on the front of the neck, this invention can be worn by the patient before surgery. This not only allows the patient to adjust to a comfortable state before surgery, but also avoids the problems of pain and wound contact that can easily occur when wearing a neck brace after surgery.

[0060] Before the patient is out of danger, they need to move their neck at regular intervals to avoid neck muscle stiffness and discomfort. However, the amount of movement is very small, and it is not easy for the patient to grasp the range of movement. When wearing this invention, after the patient's surgery and before they are out of danger, a portion of the gas in both airbags 11 can be released. The amount of gas released is about 15%-20% of the volume of the airbags 11. The stud 16 is then tightened against the bottom surface of the third slot 21, so that the patient can slowly lower their head and move their head left and right, but cannot turn their head left and right.

[0061] As the patient gradually recovers, some neck movement is permitted, and this range of movement gradually increases with the progress of recovery. At this time, the adjustment handle 17 can be rotated to move the sleeve 18 forward to align with the first scale line. At this time, the rear end of the stud 16 is located in the third slot 21, and there is a gap between it and the circle containing the bottom surface of the third slot 21. Because the airbag is in contact with the patient's chin, when the patient turns their head left and right, the airbag causes the limiting ring to rotate. Due to the restriction of the third slot 21, the patient can turn their head left and right within a range of 30° to each side (i.e., within the central angle range of the circle corresponding to the third slot 21), making the range of neck movement greater than before the critical period. As the patient gradually recovers, the adjustment handle 17 is adjusted to align the sleeve 18 forward to align with the second and third scale lines in sequence, allowing the patient to turn their head left and right within a range of 45° to each side and 60° to each side. In this way, the patient can move their neck to a limited extent even without medical staff supervision, without causing damage to the surgical wound.

[0062] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Various modifications can be made to the technical solutions of the present invention without departing from the spirit of the present invention or the scope of disclosure.

Claims

1. A neck brace after thyroid surgery, characterized in that, Includes the wearable part and the limiting part; The wearable part includes a support plate (1) and a pressure plate (2), and the left and right ends of the support plate (1) are connected to the pressure plate (2). The limiting part includes a connecting plate (8), a limiting sleeve (9) and a limiting ring. The lower part of the connecting plate (8) extends into the bearing plate (1). The upper end of the connecting plate (8) is hinged to a positioning plate (12). An angle adjustment device (13) is provided on the outside of the hinge between the positioning plate (12) and the rear side of the connecting plate (8). There are two limiting sleeves (9), which are symmetrical from left to right. The limiting sleeve (9) is formed by a groove (28) with an opening facing the center of the limiting sleeve (9) on the inner surface of the arc-shaped rod. The rear ends of the two limiting sleeves (9) are respectively hinged to the left and right ends of the front side of the positioning plate (12), and the front end faces are in contact to form an arc-shaped groove. The front ends of the grooves (28) of the two limiting sleeves (9) are connected. Each of the limiting sleeves (9) has a lug (14) at its front end. A sleeve (18) is fitted around the two lugs (14). A through groove (15) is provided on the opposite side of the two lugs (14). The two through grooves (15) are joined together to form an adjusting threaded hole. A stud (16) is screwed into the adjusting threaded hole. The front and rear ends of the stud (16) extend out of the adjusting threaded hole. An adjusting handle (17) is connected to the front end of the stud (16), and the rear end contacts the limiting ring. The limiting ring is a circular ring formed by two semi-rings (10) in contact with each other, with the outer ring extending into the slide groove (28) and the inner ring located outside the slide groove (28); The outer peripheral wall of the semi-ring (10) is provided with a first slot (19) with an outward opening, a second slot (20) is provided in the middle of the bottom surface of the first slot (19), and a third slot (21) is provided in the middle of the bottom surface of the second slot (20). An inclined connecting groove (23) is provided at the intersection of the upper surface of the semi-ring (10) and the inner ring surface. An airbag (11) is fixedly connected in the connecting groove (23) of each semi-ring (10). The airbags (11) on the two semi-rings (10) contact each other to form a circular ring. The upper surface of the lug (14) inside the sleeve (18) is provided with scale lines (27). There are three scale lines (27), which are the first scale line, the second scale line and the third scale line from back to front.

2. The cervical collar after thyroid surgery according to claim 1, characterized in that, The top surface of the support plate (1) is provided with a connecting hole (5), and the rear side surface of the support plate (1) is provided with a plurality of positioning threaded holes (6) that are connected to the connecting hole (5).

3. The cervical collar after thyroid surgery according to claim 1, characterized in that, The left and right ends of the second slot (20) are respectively spaced from the left and right ends of the first slot (19), and the left and right ends of the third slot (21) are respectively spaced from the left and right ends of the second slot (20). The first slot (19), the second slot (20) and the third slot (21) are all arcs concentric with the semi-ring (10). The third slot (21) of the semi-ring (10) located on the front side of the two semi-rings (10) faces the adjusting thread hole, and the rear end of the stud (16) is located in the third slot (21). The central angle of the third slot (21) on the semi-ring (10) is 60°, the central angle of the second slot (20) is 90°, and the central angle of the first slot (19) is 120°.

4. A cervical collar after thyroid surgery according to claim 1, characterized in that, The pressure plate (2) has a strap (3) and a connecting ring (7) at both ends respectively. One end of the strap (3) passes through the connecting ring (7) to connect the two ends of the pressure plate (2).

5. A cervical collar after thyroid surgery according to claim 1, characterized in that, The front side of the bearing plate (1) is connected to an elastic pad (4). The left and right ends of the pad (4) are aligned with the left and right sides of the bearing plate (1), respectively. The front surface of the pad (4) is an arc-shaped surface with curved edges on the left and right sides and straight edges on the top and bottom sides.

6. A cervical collar after thyroid surgery according to claim 1, characterized in that, The angle adjustment device (13) includes a nut (24) and two L-shaped screws (25). The front end of the horizontal section of the upper L-shaped screw (25) is hinged to the middle of the rear side of the positioning plate (12), and the front end of the horizontal section of the lower L-shaped screw (25) is hinged to the upper part of the rear side of the connecting plate (8). The vertical sections of the two L-shaped screws (25) are coaxially opposite and connected by the nut (24). The external threads of the two L-shaped screws (25) are in opposite directions. The upper and lower parts of the inner circumferential wall of the nut (24) are respectively provided with internal threads that match the external threads on the two L-shaped screws (25).

7. A cervical collar after thyroid surgery according to claim 1, characterized in that, A compression spring (26) is provided between the sleeve (18) and the two limiting sleeves (9) and is fitted around the outer periphery of the two lugs (14). The compression spring (26) presses the sleeve (18) against the rear side of the adjusting handle (17).

8. A cervical collar after thyroid surgery according to claim 1, characterized in that, When the rear end of the sleeve (18) is aligned with the first scale line, the rear end of the stud (16) is located in the third slot (21). When the rear end of the sleeve (18) is aligned with the second scale line, the rear end of the stud (16) is located in the second slot (20). When the rear end of the sleeve (18) is aligned with the third scale line, the rear end of the stud (16) is located in the first slot (19).

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