Cervical flexion traction device

Abstract

This utility model relates to the field of medical device technology, and in particular to a cervical flexure traction device, comprising a base, a posterior cervical fixation device, a rotating bracket, and a pushing mechanism. The posterior cervical fixation device is installed on the rear side of the base, the rotating bracket is rotatably connected to the base, and the pushing mechanism is installed on the front side of the base and is used to control the up-and-down rotation of the rotating bracket. The posterior cervical fixation device includes a cervical pillow, the middle of which has an inwardly concave arc surface for conforming to the posterior part of the human cervical spine, and each radial section of the cervical pillow is an arc surface with gradually changing curvature. When the pushing mechanism is activated, it pushes the jaw rotating bracket supporting the head to rotate flexibly along the rotation center axis set at the posterior part of the cervical spine, causing the human head to be pulled backward in a flexural arc, transforming the existing upward lifting traction into flexural traction, allowing the cervical spine to naturally extend and restore its original curvature.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a cervical flexion traction device. Background Technology

[0002] Cervical spondylosis is a syndrome caused by degenerative changes in the intervertebral discs and their surrounding structures in the cervical spine, resulting in a series of clinical symptoms. A normal cervical spine, such as... Figure 1a As shown, maintaining a natural forward-convex curve, the pathological cervical spine is like... Figure 1b and 1c As shown, Figure 1c The cervical spine exhibits a backward-curving, reverse arch. Figure 1b The cervical spine's curvature becomes straight. Currently, with the widespread use of smartphones, the "smartphone addict" lifestyle, where people spend their leisure time looking at their phones, is causing this disease to spread to teenagers and those who don't work at desks.

[0003] Treatment methods for cervical spondylosis are divided into non-surgical and surgical treatments, with traction being the main non-surgical method. Effective traction can relieve cervical muscle spasms, alleviate pain symptoms, increase the intervertebral space and intervertebral foramen, which is beneficial for the stability of herniated nucleus pulposus and fibrous tissue, adjusting and restoring the damaged internal and external balance of the cervical spine, and restoring the normal function of the cervical spine.

[0004] Currently, there are dozens of domestic and imported cervical traction devices on the market. They can be categorized into suspension type (e.g., ...) based on their traction method. Figure 2a As shown), shoulder support type (such as...) Figure 2b As shown), airbag inflatable type (such as...) Figure 2c As shown, these traction devices fall into three main categories. All of them employ an upward lifting traction method, which straightens the cervical spine, weakens its physiological curvature, and thus affects its recovery. Patent 202021484872.7 also discloses a cervical traction device that uses a drive mechanism to rotate a chin support around a center of rotation to achieve cervical traction. However, because the cervical support pillow in this device does not conform to the curvature design of the posterior cervical spine, it only serves to support and fix the head. When the chin support rotates and rises, the head is restricted by the pillow and cannot rotate backward. This means that the cervical spine is still essentially subjected to an upward lifting force, weakening its physiological curvature and thus affecting its recovery.

[0005] In recent years, cervical pillows that mimic the physiological curvature of the human head and neck have seen rapid development both domestically and internationally, such as... Figure 3a and Figure 3bAs shown, its main features are: the cervical spine rests against the curved surface of the pillow, relying on the weight of the head to achieve flexural stretching. It is simple to design and manufacture, inexpensive, and can relax the cervical spine while lying down, having some effect on relieving soreness. However, to realign a deformed cervical spine, open the gaps between vertebrae, and reposition misaligned intervertebral discs, there is no sufficient external force to provide gradual traction (traction force between 2kg and 30kg). Relying solely on the weight of the head has minimal effect.

[0006] Therefore, this case is brought. Utility Model Content

[0007] The purpose of this invention is to provide a cervical flexion traction device that enables the human head to be flexed backward in an arc, allowing the cervical spine to extend naturally and restore its original curvature, thus effectively solving the aforementioned problems.

[0008] To achieve the above objectives, the technical solution of this utility model is as follows: A cervical flexion traction device includes a base, a posterior cervical fixation device, a rotating bracket, and a pushing mechanism. The posterior cervical fixation device is installed on the rear side of the base, the rotating bracket is rotatably connected to the base, and the pushing mechanism is installed on the front side of the base and is used to control the up-and-down rotation of the rotating bracket. The posterior cervical fixation device includes a cervical pillow, the middle part of which has an inwardly concave arc surface for conforming to the posterior part of the human cervical spine, and each radial section of the cervical pillow is an arc surface with gradually changing curvature.

[0009] Furthermore, the posterior cervical spine fixation device includes a vertical position adjustment mechanism for adjusting the vertical position of the cervical pillow.

[0010] Furthermore, the up and down position adjustment mechanism includes a connecting plate, a jaw clutch, and a knob. The base has brackets on its left and right sides. The inner side of the brackets is rotatably connected to the rotating bracket. The jaw clutch is installed on the outer side of the brackets. The jaw clutch has a tooth on the side away from the bracket, and an external threaded column protrudes from the middle of the side. One end of the connecting plate is rotatably connected to one end of the cervical pillow axis. The other end of the connecting plate is provided with a shaft hole and a second tooth that can mesh with the first tooth. The knob is provided with a convex shaft in the middle, and the outer wall of the convex shaft is provided with a retaining spring groove. After the convex shaft passes through the shaft hole, it is limited by the retaining spring. The convex shaft is provided with an internal thread hole that can be threadedly connected to an external threaded column.

[0011] Furthermore, the first tooth is distributed in a ring on the surface of the jaw clutch, and the second tooth is distributed in a ring on the surface of the connecting plate.

[0012] Furthermore, the posterior cervical spine fixation device includes an anterior-posterior position adjustment mechanism for adjusting the anterior-posterior position of the cervical pillow.

[0013] Furthermore, the front and rear position adjustment mechanism includes a connecting plate, a jaw clutch, a knob, a T-block, and a lead screw assembly. The base has brackets on its left and right sides, and the inner side of the brackets is rotatably connected to the rotating bracket. The brackets have a T-shaped cross-section and a long groove arranged in the front and rear direction, with the long groove opening near the outer side of the bracket. The T-block has an external threaded post in its middle, and the T-block is embedded in the long groove and can move back and forth along the long groove. The lead screw assembly includes a lead screw mounted on a bracket and arranged in a front-back direction. One end of the lead screw is provided with a rotating handle. A lead screw nut is threaded onto the lead screw. The lead screw nut is fixed to the T-block and is used to realize the front-back movement of the T-block. The jaw clutch is located on the outside of the bracket, and has a third tooth on the side facing the bracket. The outer side of the bracket has a fourth tooth that can mesh with the third tooth. A through hole is opened in the middle of the jaw clutch. One end of the connecting plate is rotatably connected to one end of the cervical pillow along its axis, and the other end is fitted with the knob. The knob has an internal threaded hole in the middle. The external threaded column passes through the opening of the long slot and the middle through hole of the jaw clutch in sequence on the outside of the bracket, and connects with the internal threaded hole of the knob.

[0014] Furthermore, including a movable screw and a push spring, the jaw clutch has screw holes on both sides of the through hole one, and the T-block has a through hole two corresponding to the screw holes. The movable screw includes a straight rod section and a threaded section. The straight rod section passes through the through hole two, and the threaded section is screwed into the screw hole of the jaw clutch. The push spring is sleeved on the outside of the straight rod section and abuts between the T-block and the jaw clutch.

[0015] Furthermore, the fourth tooth is distributed in a straight line in the front-back direction on the bracket, and there are two sets of the fourth tooth, located on the upper and lower sides of the opening of the long slot respectively; the third tooth is distributed in a straight line in the front-back direction on the jaw clutch, and there are two sets of the fourth tooth and they are arranged opposite to the two sets of the third tooth.

[0016] Furthermore, the parts of the base, cervical pillow, and rotating bracket that come into contact with the human body are covered with a flexible layer.

[0017] Furthermore, the pushing mechanism is used to generate flexural traction force, and its control employs one or more of electric control, pneumatic control, hydraulic control, manual control, and digital control.

[0018] Furthermore, the cervical pillow is equipped with a phototherapy module and / or a magnetic therapy module.

[0019] The advantages of this invention are as follows: the concave arc in the middle of the cervical pillow's axis contacts the arc of the protruding cervical vertebrae, fixing the position of the cervical spine and preventing it from moving to the left or right; at the same time, the concave arc in the middle allows the head to rotate backward under the action of thrust, using the cervical pillow as a contact support for the posterior part of the cervical spine during cervical traction. When the pushing mechanism is activated, it pushes the jaw rotation bracket supporting the head to rotate in a curved direction along the rotation center axis set at the posterior part of the cervical spine, causing the human head to be pulled backward in a curved arc, transforming the existing upward lifting traction into curved traction, allowing the cervical spine to naturally extend and restore its original curvature. Attached Figure Description

[0020] Figure 1a This is a schematic diagram of a normal cervical spine in the background art; Figure 1b This is a schematic diagram of the cervical spine curvature becoming straight in the background art. Figure 1c This is a schematic diagram of the cervical spine curvature exhibiting a reverse arch state in the background art; Figure 2a This is a schematic diagram of a suspended traction device in the background art; Figure 2b This is a schematic diagram of a shoulder-supported traction device in the background art; Figure 2c This is a schematic diagram of a bladder-expanding traction device in the background art; Figure 3a and Figure 3b This is a schematic diagram of a cervical pillow that mimics the physiological curvature of the human head and neck in the background art. Figure 4 This is a front view schematic diagram of the cervical flexion traction device in the embodiment; Figure 5 This is a side view of the cervical flexion traction device in the embodiment; Figure 6 This is a top view of the cervical flexion traction device in the embodiment; Figure 7 This is a three-dimensional structural diagram of the cervical pillow in the embodiment of the cervical flexion traction device; Figure 8 for Figure 4 Enlarged diagram of part A in the diagram; Figure 9 This is an exploded schematic diagram of the posterior cervical spine fixation device in the embodiment; Figure 10 for Figure 9 A diagram from another perspective; Figure 11 and Figure 12 This is a schematic diagram illustrating the front-to-back position adjustment of the cervical pillow in the embodiment; Figure 13 and Figure 14This is a schematic diagram illustrating the vertical adjustment of the cervical pillow in the embodiment; Figure 15 This is a schematic diagram of the rotating bracket's operating state in the embodiment; Figure 16 This is a schematic diagram of the cervical flexion traction device during flexion traction in the embodiment; Label Explanation 1. Base; 101. Bracket; 1011. Long groove; 1012. Tooth 4; 1013. Thoracic vertebral fixation unit; 2. Rear-pillow type cervical spine fixation device; 201. Cervical pillow; 2011. Concave arc surface; 202. Connecting plate; 2021. Shaft hole; 2022. Gear 2; 203. Knob; 2031. Convex shaft; 2032. Internal threaded hole; 204. Snap ring; 205. Jaw clutch; 2051. Gear 1; 2052. Gear 3; 2053. Through hole 1; 2054. Screw hole; 206. T-block; 2061. Through hole 2; 2062. External threaded post; 207. Movable screw; 208. Push spring; 209. Lead screw assembly; 2091. Lead screw; 2092. Nut; 2093. Rotating handle; 210. Hinge; 3. Rotate the bracket; 301. Jaw support position; 4. Promotion agencies. Detailed Implementation

[0021] The present invention will be further described in detail below with reference to the embodiments. It should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer" etc. indicated by the accompanying drawings are only for the convenience of describing the present invention and simplifying the description, and are not intended to 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 the present invention.

[0022] This embodiment proposes a cervical flexion traction device, such as... Figures 4 to 16 As shown, it includes a base 1, a posterior cervical spine fixation device 2, a rotating bracket 3, and a pushing mechanism 4.

[0023] refer to Figure 10 The base 1 is U-shaped with a central traction channel to accommodate a user's neck. The left and right sides of the U-shaped base 1 are shoulder supports that extend downwards and connect to form the thoracic spine fixation part 1013 of the base 1. The thoracic spine fixation part 1013 works in conjunction with the shoulder supports of the base to ensure that the base 1 is stably placed near the human cervical spine.

[0024] refer to Figure 5 and Figure 10A bracket 101 is provided above the left and right shoulder supports of the base 1. A rotation center shaft is provided on the inner side of the bracket 101 (the side of the bracket 101 closest to the traction channel is defined as the inner side, and the side furthest from the traction channel is defined as the outer side), serving as the rotation center of the rotating bracket 3. The two sides of the rotating bracket 3 are rotatably connected to the rotation center shaft by fixing screws. (Reference) Figure 4 , Figure 5 , Figure 6 and Figure 15 The pushing mechanism 4 is installed on the front side of the base 1 and is used to control the up and down rotation of the rotating bracket 3. In this embodiment, the pushing mechanism 4 is a cylinder. Supports are provided on the lower jaw support position 301 of the rotating bracket 3 and the thoracic vertebra fixing part 1013 of the base 1. The cylinder body end and piston end of the cylinder are rotatably connected to the support by a pin. Through pneumatic control, the rotation of the rotating bracket 3 around the rotation center can be realized. The pushing mechanism 4 can also adopt one or more of the following: pneumatic control, electric control, manual control, hydraulic control, and digital control. Electric control is such as electric push rod, hydraulic control is such as hydraulic cylinder, manual control is such as gear and rack control, etc. Digital control realizes intelligent control through algorithms and data processing. All these pushing mechanisms 4 can provide sufficient external force for traction and stretching from small to large.

[0025] The posterior cervical spine fixation device 2 is installed on the rear side of the base 1, including a cervical pillow 201, such as... Figures 4 to 7 As shown, the cervical pillow 201 has a concave arc surface 2011 in the middle of its axial direction for conforming to the posterior part of the human cervical spine, and each radial section of the cervical pillow 201 at its axial position is an arc surface with gradually changing curvature. Figure 7 As can be seen, the cervical pillow 201 has concave arc surfaces 2011 in the center of the front and the center of the upper and lower sides. This fixes the position of the cervical spine, preventing it from moving to the left or right, while the concave arc in the center allows the head to rotate backward under the action of thrust. Using the cervical pillow 201 as the contact support for the posterior part of the cervical spine during cervical traction, when the pushing mechanism 4 is activated, it pushes the jaw rotation bracket 3 supporting the head to rotate in a curved direction along the rotation center axis set at the posterior part of the cervical spine, causing the human head to be pulled backward in a curved arc, changing the existing upward lifting traction to curved traction, allowing the cervical spine to naturally extend and restore its original curvature.

[0026] like Figure 15 The diagram shown illustrates the state of the traction device during curved traction operation. Curve b represents the trajectory of the cylinder piston rod and the connection point of the rotating bracket 3 along the rotation center a. Figure 15 The middle C position is the initial position line when the human head and cervical spine are subjected to traction. Figure 15 Point d in the diagram represents the position line when the cervical spine of the human head is in the correct position after traction. Figure 15 In the diagram, line segment 'e' represents the stroke of the head and jaw from the initial position to the final traction position. For example... Figure 16The diagram illustrates the movement of the human head bending backward in an arc.

[0027] Due to individual differences, the length and curvature of the cervical spine vary from person to person. Therefore, the cervical pillow 201 needs adjustment not only for its front-to-back position but also for its height. The posterior-type cervical fixation device 2 also includes a height adjustment mechanism and a front-to-back adjustment mechanism, which can be used to adjust the height and front-to-back positions of the cervical pillow 201. The height and front-to-back adjustment mechanisms can adopt existing structural forms or can be innovated based on the traction device structure. This embodiment innovates the structure of the height and front-to-back adjustment mechanisms as follows.

[0028] like Figure 9 and Figure 10 As shown, the vertical position adjustment mechanism and the front-back position adjustment mechanism of this embodiment are integrated together, including a connecting plate 202, a knob 203, a jaw clutch 205, a T-block 206, and a lead screw assembly 209. The connecting plate 202 is a rectangular flat plate. One end of the connecting plate 202 is rotatably connected to one end of the cervical pillow 201 through a two-section hinge 210. The other end of the connecting plate 202 is semi-circular, with a shaft hole 2021 in the center of the semi-circle. The knob 203 has a convex shaft 2031 in the middle, and the outer wall of the convex shaft 2031 has a retaining spring groove. After the convex shaft 2031 passes through the shaft hole 2021, it is limited by the retaining spring 204 to realize the rotatable connection between the knob 203 and the connecting plate 202. The convex shaft 2031 has an internal thread hole 2032. A jaw clutch 205 is disposed between the connecting plate 202 and the outer side of the bracket 101. The jaw clutch 205 has a tooth 2051 on its side away from the bracket 101, and a tooth 2022, which meshes with the tooth 2051, is provided on the semi-circular surface of the connecting plate 202. A T-shaped, longitudinally oriented long groove 1011 is formed inside the bracket 101. The long groove 1011 opens to the outer side of the bracket 101. An externally threaded post 2062 is provided in the middle of the T-shaped block 206. The T-shaped block 206 is embedded in the long groove 1011 and can move longitudinally along the long groove 1011. The lead screw assembly 209 includes a lead screw 2091 installed inside the bracket 101 and oriented longitudinally. One end of the lead screw 2091 has a rotating handle 2093. A nut 2092 is threaded onto the lead screw 2091, and the nut 2092 is fixed to the T-shaped block 206 (e.g., ...). Figure 10As shown, the nut 2092 extends upward to form a protrusion, and the lower part of the T-block 206 is provided with a mounting groove. The upper end of the protrusion is inserted into the mounting groove to fix the nut 2092 and the T-block 206, which is used to realize the forward and backward movement of the T-block 206. The jaw clutch 205 has a tooth 3 2052 on the side facing the bracket 101. The outer side of the bracket 101 is provided with a tooth 4 1012 that can mesh with the tooth 3 2052. The jaw clutch 205 has a through hole 1 2053 in the middle. The external threaded post 2062 passes through the opening of the long groove 1011 and the through hole 1 2053 in the middle of the jaw clutch 205 in sequence, and connects to the internal threaded hole 2032 of the knob 203.

[0029] like Figure 8 As shown, to achieve automatic separation of gear 3 2052 and gear 4 1012, this embodiment also includes a movable screw 207 and a push spring 208. The jaw clutch 205 has screw holes 2054 on both sides of the through hole 1 2053. The T-block 206 has a through hole 2061 with a countersunk hole corresponding to the screw hole 2054. The movable screw 207 includes a countersunk head, a straight rod section and a threaded section. The straight rod section passes through the through hole 2061, and the threaded section is screwed into the screw hole 2054 of the jaw clutch 205. The push spring 208 is sleeved on the straight rod section and abuts between the T-block 206 and the jaw clutch 205.

[0030] The cervical pillow 201's forward and backward adjustment is as follows: Figure 11 and Figure 12 As shown, the process is as follows: Loosen knob 203, and the spring pushes tooth 3 2052 and tooth 4 1012 apart (at this time, tooth 1 2051 and tooth 2 2022 are also actually separated, and the up and down position can also be adjusted. This section focuses on the adjustment of the front and back position, so the adjustment of the up and down position will not be elaborated). This separates the jaw clutch 205 from the bracket 101. At this time, operate the rotating handle 2093 to rotate the lead screw 2091. The rotation of the lead screw 2091 drives the T-block 206 to move back and forth through the nut 2092. The back and forth movement of the T-block 206 drives the connecting plate 202 to move back and forth through the external threaded column 2062 and knob 203, thereby realizing the back and forth position adjustment of the cervical pillow 201. After the position is adjusted to the right position, tighten knob 203. During the screwing process, the tooth 3 2052 on the jaw clutch 205 and the tooth 4 1012 on the bracket 101 are engaged, thereby achieving fixation.

[0031] Preferably, the four teeth 1012 are arranged in a straight line along the front and back direction on the bracket 101, and there are two sets of four teeth 1012, located on the upper and lower sides of the opening of the long groove 1011 respectively; the three teeth 2052 are arranged in a straight line along the front and back direction on the jaw clutch 205, and there are two sets of three teeth 2052, which are arranged opposite to the two sets of four teeth 1012. In this way, the jaw clutch 205 can be engaged and fixed with the bracket 101 at any position.

[0032] The vertical adjustment of the cervical pillow 201 is as follows: Figure 13 and Figure 14 As shown, the process is as follows: Loosen the knob 203, and the connecting plate 202 is driven by the snap ring 204 to move away from the jaw clutch 205, so that tooth 1 2051 and tooth 2022 are separated (at this time, tooth 3 2052 and tooth 4 1012 are also separated under the action of the spring, but without adjusting the lead screw assembly 209, the forward and backward position cannot be adjusted). At this time, the connecting plate 202 can rotate around the cam shaft 2031, thereby realizing the up and down position adjustment of the cervical pillow 201. After the position is adjusted to the right position, tighten the knob 203. During the screwing process, the tooth 1 2051 on the jaw clutch 205 and the tooth 2 2022 on the connecting plate 202 are engaged, thereby achieving fixation.

[0033] Preferably, the first tooth 2051 is arranged in a ring on the surface of the jaw clutch 205, and the second tooth 2022 is arranged in a ring on the surface of the connecting plate 202, thereby realizing the separation and engagement of the connecting plate 202 and the jaw clutch 205 at any circumferential angle.

[0034] Preferably, the parts of the base 1, cervical pillow 201, and rotating bracket 3 that come into contact with the human body are covered with a flexible layer to improve patient comfort. Additionally, the cervical pillow contains a phototherapy module and a magnetic therapy module.

[0035] The above embodiments are only used to explain the concept of this utility model, and are not intended to limit the protection of this utility model. Any non-substantial modifications made to this utility model using this concept should fall within the protection scope of this utility model.

Claims

1. A cervical flexion traction device, comprising a base, a posterior cervical fixation device, a rotating bracket, and a pushing mechanism, wherein the posterior cervical fixation device is installed on the rear side of the base, the rotating bracket is rotatably connected to the base, and the pushing mechanism is installed on the front side of the base and is used to control the up-and-down rotation of the rotating bracket; characterized in that: The posterior cervical spine fixation device includes a cervical pillow. The cervical pillow has a concave arc surface in the middle of its axial direction for conforming to the posterior part of the human cervical spine, and each radial section of the cervical pillow is an arc surface with gradually changing curvature.

2. A cervical curvature traction device as claimed in claim 1, wherein, The posterior cervical spine fixation device includes an up-and-down position adjustment mechanism for adjusting the up-and-down position of the cervical pillow.

3. A cervical curvature traction device as claimed in claim 2, wherein, The up and down position adjustment mechanism includes a connecting plate, a jaw clutch and a knob. The base is provided with brackets on the left and right sides. The inner side of the bracket is rotatably connected to the rotating bracket. The jaw clutch is installed on the outer side of the bracket. The jaw clutch has a tooth on the side away from the bracket, and an external threaded column protrudes from the middle of the side. One end of the connecting plate is rotatably connected to one end of the cervical pillow axis. The other end of the connecting plate is provided with a shaft hole and a second tooth that can mesh with the first tooth. The knob is provided with a convex shaft in the middle, and the outer wall of the convex shaft is provided with a retaining spring groove. After the convex shaft passes through the shaft hole, it is limited by the retaining spring. The convex shaft is provided with an internal thread hole that can be threadedly connected to an external threaded column.

4. A cervical curvature traction device as claimed in claim 3, wherein, The first tooth is distributed in a ring on the surface of the toothed clutch, and the second tooth is distributed in a ring on the surface of the connecting plate.

5. A cervical curvature traction device as claimed in claim 1, wherein, The posterior-position cervical spine fixation device includes an anterior-posterior position adjustment mechanism for adjusting the anterior-posterior position of the cervical pillow.

6. A cervical curvature traction device as claimed in claim 5, wherein, The front and rear position adjustment mechanism includes a connecting plate, a jaw clutch, a knob, a T-block, and a lead screw assembly. The base has brackets on its left and right sides, and the inner side of the brackets is rotatably connected to the rotating bracket. The brackets have a T-shaped cross-section and a long groove arranged in the front and rear direction, with the long groove opening near the outer side of the bracket. The T-block has an external threaded post in the middle, and the T-block is embedded in the long groove and can move back and forth along the long groove. The lead screw assembly includes a lead screw mounted on a bracket and arranged in a front-back direction. One end of the lead screw is provided with a rotating handle. A lead screw nut is threaded onto the lead screw. The lead screw nut is fixed to the T-block and is used to realize the front-back movement of the T-block. The jaw clutch is located on the outside of the bracket, and has a third tooth on the side facing the bracket. The outer side of the bracket has a fourth tooth that can mesh with the third tooth. A through hole is opened in the middle of the jaw clutch. One end of the connecting plate is rotatably connected to one end of the cervical pillow along its axis, and the other end is fitted with the knob. The knob has an internal threaded hole in the middle. The external threaded column passes through the opening of the long slot and the middle through hole of the jaw clutch in sequence on the outside of the bracket, and connects with the internal threaded hole of the knob.

7. A cervical curvature traction device as claimed in claim 6, wherein, The device includes a movable screw and a push spring. The jaw clutch has screw holes on both sides of the through hole one. The T-block has a through hole two corresponding to the screw holes. The movable screw includes a straight rod section and a threaded section. The straight rod section passes through the through hole two, and the threaded section is screwed into the screw hole of the jaw clutch. The push spring is sleeved on the straight rod section and abuts between the T-block and the jaw clutch.

8. A cervical curvature traction device as in claim 6, wherein, The fourth tooth is arranged in a straight line along the front and back on the bracket, and there are two sets of fourth teeth, located on the upper and lower sides of the opening of the long slot respectively; the third tooth is arranged in a straight line along the front and back on the tooth clutch, and there are two sets of third teeth, which are arranged opposite to the two sets of fourth teeth.

9. A cervical curvature traction device as in claim 1, wherein, The parts of the base, cervical pillow, and rotating bracket that come into contact with the human body are covered with a flexible layer.

10. A cervical curvature traction device as in claim 1, wherein, The pushing mechanism is used to generate flexural traction force, and its control adopts one or more of electric control, pneumatic control, hydraulic control, manual control and digital control.

11. A cervical curvature traction device as in claim 1, wherein, The cervical pillow is equipped with a phototherapy module and / or a magnetic therapy module.

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