Rear pillow type cervical vertebra fixing device

Abstract

The invention relates to the technical field of medical instruments, in particular to a rear pillow type cervical vertebra fixing device which is mounted on a base and comprises a cervical vertebra pillow, an up-down position adjusting mechanism and a front-back position adjusting mechanism. The axial middle part of the cervical vertebra pillow is provided with a concave circular arc curved surface which is attached to the rear part of the cervical vertebra of a human body, and each radial section in the axial position of the cervical vertebra pillow is a circular arc surface of which the curvature is gradually changed; the concave arc in the axial middle of the cervical pillow is in contact with the cervical vertebra of a human body to fix the position of the cervical vertebra and prevent the cervical vertebra from moving leftwards and rightwards; the middle concave arc allows the head to rotate backwards under the action of pushing force, the cervical pillow serves as a contact support of the rear portion of the cervical vertebra during cervical traction, and when the pushing mechanism acts, the lower jaw rotating bracket for supporting the head is pushed to rotate in the curved direction along the rotating center shaft arranged on the rear portion of the cervical vertebra, so that the head of the human body conducts curved arc traction backwards. Existing upward lifting type traction is converted into curved traction, so that the cervical vertebra can naturally stretch, and the original curvature of the cervical vertebra is recovered.

Description

Technical Field

[0001] The present invention relates to the technical field of medical devices, and in particular to a back-pillow type cervical vertebra fixation device. Background Art

[0002] Cervical spondylosis is a syndrome of a series of clinical symptoms caused by degenerative changes in the cervical intervertebral disc and its accessory structures. Figure 1a As shown, the cervical vertebrae maintain a natural forward convex arc. Figure 1b and 1c As shown, Figure 1c The cervical spine is in a backward-bending state. Figure 1b The curvature of the cervical spine becomes straight. With the widespread use of smartphones, the disease is spreading to teenagers and non-desk workers due to the tendency of people to look down at their phones during leisure time.

[0003] Treatments for cervical spondylosis include non-surgical and surgical treatments, with traction being the primary non-surgical treatment. Effective traction can relieve cervical muscle spasms, alleviate pain, enlarge the intervertebral spaces and foramina, stabilize the protruding nucleus pulposus and fibrous tissue, and restore the damaged internal and external balance of the cervical spine, ultimately restoring normal cervical function.

[0004] There are dozens of domestic and imported cervical traction devices on the market. According to the different traction methods, they can be divided into suspension type (such as Figure 2a As shown), shoulder support (as shown Figure 2b As shown), airbag expansion type (as shown Figure 2c There are three categories of traction devices (as shown), all of which adopt the form of upward lifting traction. Such traction straightens the cervical vertebrae and weakens the physiological curvature of the cervical vertebrae, thereby affecting the recovery of the cervical vertebrae. In Patent 202021484872.7, a cervical traction device is also disclosed, which uses a driving mechanism to push the chin support to rotate around the rotation center to achieve traction of the cervical vertebrae. However, since the cervical support pillow of the device does not conform to the curvature design of the back of the human cervical vertebrae, it only plays a supporting and fixing role for the head. When the chin support is rotated and raised, the head is limited by the pillow and cannot rotate backward, resulting in the human cervical vertebrae still being subjected to an upward lifting force, which weakens the physiological curvature of the cervical vertebrae, thereby affecting the recovery of the cervical vertebrae.

[0005] In recent years, cervical pillows that imitate the physiological curvature of the human head and neck have developed rapidly at home and abroad, such as Figure 3a and Figure 3bAs shown in the figure, its main features are: the human cervical spine leans 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, which is effective in relieving pain. However, to restore the deformed cervical spine, open the spaces between the vertebrae, and return the dislocated intervertebral discs, sufficient external force (traction force of 2kg-30kg) is required to achieve a minimal effect. Relying solely on the weight of the head is not effective.

[0006] Based on this, this case is brought forward. Summary of the Invention

[0007] The purpose of the present invention is to provide a back-pillow type cervical vertebra fixation device, which can realize the traction of the human head backward in a circular arc, so that the cervical vertebra can be naturally stretched and the original curvature of the cervical vertebra can be restored, thus better solving the above-mentioned problems.

[0008] In order to achieve the above object, the technical solution of the present invention is as follows:

[0009] A rear pillow type cervical vertebra fixation device is installed on a base and includes a cervical vertebra pillow, an upper and lower position adjustment mechanism and a front and back position adjustment mechanism; the axial middle part of the cervical vertebra pillow has an inwardly concave arc surface for fitting with the rear part of the human cervical vertebra, and each radial section at the axial position of the cervical vertebra pillow is an arc surface with a gradually changing curvature; the upper and lower position adjustment mechanism is used to adjust the upper and lower position of the cervical vertebra pillow, and the front and back position adjustment mechanism is used to adjust the front and back position of the cervical vertebra pillow.

[0010] Furthermore, the up and down position adjustment mechanism includes a connecting plate, a dog clutch and a knob, a bracket is provided on the left and right sides of the base, the dog clutch is installed on the outside of the bracket, and the dog clutch is provided with a tooth on the side away from the bracket, and an external threaded column protrudes from the middle of the side;

[0011] One end of the connecting plate is rotatably connected to one end of the cervical pillow shaft, and the other end of the connecting plate is provided with an axial hole and a tooth 2 that can engage with the tooth 1. A convex shaft is provided in the middle of the knob, and a retaining spring groove is provided on the outer wall of the convex shaft. After the convex shaft passes through the axial hole, it is limited by the retaining spring, and an internal threaded hole that can be threadedly connected to the external threaded column is provided on the convex shaft.

[0012] Furthermore, the teeth 1 are distributed in an annular shape on the surface of the tooth clutch, and the teeth 2 are distributed in an annular shape on the surface of the connecting plate.

[0013] Furthermore, the front-to-back position adjustment mechanism includes a connecting plate, a tooth clutch, a knob, a T-block, and a screw assembly. Brackets are provided on the left and right sides of the base. The brackets are provided with a long slot with a T-shaped cross section and arranged in a front-to-back direction, and the long slot opens on the outside of the bracket; an external threaded column is provided in the middle of the T-block, and the T-block is embedded in the long slot and can move forward and backward along the long slot;

[0014] The screw assembly includes a screw rod installed on the bracket and arranged in the front and back directions, a rotating handle is provided at one end of the screw rod, a nut is threadedly connected to the screw rod, and the nut is fixed to the T-block for realizing the front and back movement of the T-block;

[0015] The dog clutch is located outside the bracket, and a tooth three is provided on a side facing the bracket, a tooth four is provided on the outer side of the bracket and can engage with the tooth three, and a through hole one is opened in the middle of the dog clutch;

[0016] One end of the connecting plate is rotatably connected to one end of the cervical pillow shaft, and the other end is installed with the knob. An internal threaded hole is provided in the middle of the knob. The external threaded column passes through the opening of the long slot and the middle through hole of the tooth clutch toward the outside of the bracket, and is connected to the internal threaded hole of the knob.

[0017] Furthermore, it includes a movable screw and a push spring. The tooth clutch is provided with screw holes on both sides of the through hole one, and the T-block is provided with 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 tooth clutch. The push spring is sleeved outside the straight rod section and rests between the T-block and the tooth clutch.

[0018] Furthermore, the tooth four is distributed in a straight line in the front-to-back direction on the bracket, and there are two groups of tooth four, respectively located on the upper and lower sides of the long slot opening; the tooth three is distributed in a straight line in the front-to-back direction on the tooth clutch, and there are two groups of tooth three and arranged opposite to the two groups of tooth four.

[0019] Furthermore, the outside of the cervical pillow is wrapped with a flexible layer.

[0020] Furthermore, a light therapy module and / or a magnetic therapy module is provided in the cervical pillow.

[0021] The advantages of the present invention are as follows: the concave arc in the middle of the cervical pillow axis contacts the arc at the rear of the cervical protrusion, thereby fixing the position of the cervical spine and preventing the cervical spine from moving left and right; at the same time, the concave arc in the middle allows the head to rotate backward under the action of thrust, and the cervical pillow serves as a contact support for the rear of the cervical spine during cervical traction. When the pushing mechanism is activated, the lower jaw rotation bracket supporting the head is pushed to rotate in a curved direction along the rotation center axis set at the rear of the cervical spine, causing the human head to be pulled backward in a curved arc, converting the existing upward lifting traction into curved traction, allowing the cervical spine to stretch naturally and restore the original curvature of the cervical spine. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1a A schematic diagram of a normal cervical spine in the background art;

[0023] Figure 1bIt is a schematic diagram of the cervical vertebra curvature becoming straight in the background art;

[0024] Figure 1c This is a schematic diagram of the cervical vertebrae in the background art when the curvature is in a reverse kyphosis state;

[0025] Figure 2a A schematic diagram of a suspended tractor in the background art;

[0026] Figure 2b A schematic diagram of a shoulder-support traction device in the background art;

[0027] Figure 2c A schematic diagram of an airbag expansion type tractor in the background art;

[0028] Figure 3a and Figure 3b A schematic diagram of a cervical pillow that imitates the physiological curvature of the human head and neck in the background art;

[0029] Figure 4 2. It is a schematic front view of the cervical vertebra flexion traction device in the embodiment;

[0030] Figure 5 A schematic side view of a cervical flexion traction device in an embodiment;

[0031] Figure 6 Schematic top view of the cervical flexion traction device in the embodiment;

[0032] Figure 7 Schematic diagram of the three-dimensional structure of the cervical pillow of the cervical flexion traction device in the embodiment;

[0033] Figure 8 for Figure 4 A magnified schematic diagram of part A in FIG;

[0034] Figure 9 An exploded schematic diagram of a back-pillow type cervical vertebra fixation device in an embodiment;

[0035] Figure 10 for Figure 9 Schematic diagram from another perspective;

[0036] Figure 11 and Figure 12 Schematic diagram of the front-back position adjustment of the cervical pillow in the embodiment;

[0037] Figure 13 and Figure 14 Schematic diagram of the upper and lower position adjustment of the cervical pillow in the embodiment;

[0038] Figure 15 Schematic diagram of the operating state of the rotating bracket in the embodiment;

[0039] Figure 16Schematic diagram of the state of the cervical vertebra flexion traction device during flexion traction in the embodiment;

[0040] Description of labels

[0041] 1. Base; 101. Bracket; 1011. Long slot; 1012. Tooth 4; 1013. Thoracic vertebra fixation part;

[0042] 2. Back-pillow cervical fixation device; 201. Cervical pillow; 2011. Concave arc surface; 202. Connecting plate; 2021. Shaft hole; 2022. Tooth 2; 203. Knob; 2031. Protruding shaft; 2032. Internally threaded hole; 204. Circlip; 205. Tooth clutch; 2051. Tooth 1; 2052. Tooth 3; 2053. Through hole 1; 2054. Screw hole; 206. T-block; 2061. Through hole 2; 2062. Externally threaded column; 207. Active screw; 208. Push spring; 209. Screw assembly; 2091. Screw; 2092. Nut; 2093. Rotating handle; 210. Hinge;

[0043] 3. Rotating bracket; 301. Mandibular support position;

[0044] 4. Promote the organization. DETAILED DESCRIPTION

[0045] The present invention is further described in detail below in conjunction with the embodiments. It should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc. used herein to indicate directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0046] This embodiment provides a cervical vertebra flexion traction device, such as Figures 4 to 16 As shown, it includes a base 1, a back-pillow type cervical vertebra fixation device 2, a rotating bracket 3 and a pushing mechanism 4.

[0047] refer to Figure 10 The base 1 is U-shaped, with a central push-pull channel for accommodating a user's neck. The left and right sides of the U-shaped base 1 serve as shoulder supports, which extend downward and connect to form a thoracic vertebrae fixation portion 1013 of the base 1. The thoracic vertebrae fixation portion 1013 works in conjunction with the base shoulder support to ensure that the base 1 is stably placed near the human cervical spine.

[0048] 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 axis is provided on the inner side of the bracket 101 (the side of the bracket 101 close to the traction channel is defined as the inner side, and the side away from the traction channel is defined as the outer side). This axis serves as the rotation center of the rotating bracket 3. Both sides of the rotating bracket 3 are rotatably connected to the rotation center axis by fixing screws. Figure 4 、 Figure 5 、 Figure 6 and Figure 15 The pushing mechanism 4 is mounted on the front side of the base 1 and is used to control the up and down rotation of the rotating bracket 3. The pushing mechanism 4 of this embodiment adopts a cylinder. A support is provided on the mandibular support position 301 of the rotating bracket 3 and the thoracic vertebra fixing portion 1013 of the base 1. The cylinder body end and the piston end of the cylinder are rotatably connected to the support via a pin. The rotating bracket 3 can be rotated around the rotation center by pneumatic control. The pushing mechanism 4 can also adopt one or more of pneumatic control, electric control, manual control, hydraulic control and digital control. Electric control can be achieved by an electric push rod, hydraulic control by a hydraulic cylinder, manual control by a gear and rack control, etc. Digital control can achieve intelligent control through algorithms and data processing. These pushing mechanisms 4 can provide sufficient external force for traction and stretching from small to large.

[0049] The rear pillow type cervical vertebra fixation device 2 is installed on the rear side of the base 1, including a cervical pillow 201, as shown in FIG. Figures 4 to 7 As shown, the middle part of the axial direction of the cervical pillow 201 has a concave arc surface 2011 for fitting with the back of the human cervical spine, and each radial section of the axial position of the cervical pillow 201 is an arc surface with a gradually changing curvature. Figure 7 As can be seen in the figure, the middle part of the front and the middle part of the upper and lower sides of the cervical pillow 201 all have a concave arc curved surface 2011. This fixes the position of the cervical vertebra and prevents the cervical vertebra from moving left and right. At the same time, the concave arc in the middle part allows the head to rotate backward under the thrust. When the cervical pillow 201 is used as the contact support at the rear of the cervical vertebra during traction of the cervical vertebra, when the pushing mechanism 4 moves, the lower jaw rotating bracket 3 that pushes the head to rotate along the rotation center axis arranged at the rear of the cervical vertebra, so that the human head is pulled backward in a curved arc, and the existing upward lifting traction is converted into a curved traction, so that the cervical vertebra is naturally stretched and the original curvature of the cervical vertebra is restored.

[0050] like Figure 15 The diagram shows the state of the tractor when it is performing curved traction work, wherein the curve b is the motion trajectory of the connection point between the cylinder piston rod and the rotating bracket 3 along the rotation center a. Figure 15 The middle c position is the initial position line of the human head and cervical spine during traction. Figure 15 Point d in the figure is the position line when the human head and cervical vertebra are pulled into place. Figure 15 The line segment e in the figure is the travel of the traction activity of the head and jaw from the starting position to the traction position. Figure 16The figure shows the change of the movement of causing the human head to bend backward and be pulled into an arc.

[0051] Due to individual differences in the length and curvature of the cervical spine, the cervical pillow 201 needs to be adjusted not only in terms of its front-to-back position but also in terms of its height. The rear-pillow cervical fixation device 2 also includes a vertical position adjustment mechanism and a front-to-back position adjustment mechanism, which can be used to adjust the vertical position and the front-to-back position of the cervical pillow 201. The vertical position adjustment mechanism and the front-to-back position adjustment mechanism can adopt existing structural forms or can be innovated with respect to the traction device structure. In this embodiment, structural innovations are made to the vertical position adjustment mechanism and the front-to-back position adjustment mechanism, as detailed below.

[0052] like Figure 9 and Figure 10 As shown, the up-down 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 dog clutch 205, a T-block 206, and a screw assembly 209. The connecting plate 202 is a rectangular flat plate, one end of which is rotatably connected to one end of the cervical pillow 201 via a two-section hinge 210. The other end of the connecting plate 202 is semicircular in shape, with an axial hole 2021 defined in the center of the semicircle. A protruding shaft 2031 is defined in the middle of the knob 203, and a retaining spring groove is defined on the outer wall of the protruding shaft 2031. After the protruding shaft 2031 passes through the axial hole 2021, it is limited by a retaining spring 204, thereby realizing the rotatable connection between the knob 203 and the connecting plate 202. The protruding shaft 2031 is provided with an internal threaded hole 2032. The tooth clutch 205 is arranged between the connecting plate 202 and the outer side surface of the bracket 101. The tooth clutch 205 is provided with a tooth 1 2051 on the side away from the bracket 101, and the semicircular surface of the connecting plate 202 is provided with a tooth 2022 that can engage with the tooth 1 2051. A long slot 1011 with a T-shaped cross section and arranged in a front-to-back direction is opened in the bracket 101. The long slot 1011 is open on the outside of the bracket 101. The middle part of the T-block 206 is provided with an external threaded column 2062. The T-block 206 is embedded in the long slot 1011 and can move forward and backward along the long slot 1011. The screw assembly 209 includes a screw rod 2091 installed in the bracket 101 and arranged in a front-to-back direction. A rotating handle 2093 is provided at one end of the screw rod 2091. A nut 2092 is threadedly connected to the screw rod 2091. The nut 2092 is fixed to the T-block 206 (as shown in FIG. Figure 10As shown, the nut 2092 extends upward to form a protrusion. The lower portion of the T-block 206 is provided with a mounting slot. The upper end of the protrusion engages the mounting slot to secure the nut 2092 to the T-block 206, thereby enabling forward and backward movement of the T-block 206. The tooth clutch 205 is provided with a third tooth 2052 on the side facing the bracket 101. The outer side of the bracket 101 is provided with a fourth tooth 1012 that engages with the third tooth 2052. A through hole 1053 is defined in the middle of the tooth clutch 205. An externally threaded post 2062 extends toward the outside of the bracket 101, sequentially passing through the opening of the long slot 1011 and the through hole 1053 in the middle of the tooth clutch 205, and connects to the internally threaded hole 2032 of the knob 203.

[0053] like Figure 8 As shown, in order to realize the automatic separation of tooth three 2052 and tooth four 1012, this embodiment further includes a movable screw 207 and a push spring 208. The tooth clutch 205 is provided with screw holes 2054 on both sides of the through hole 1 2053. The T-block 206 is provided with 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 tooth clutch 205. The push spring 208 is sleeved outside the straight rod section and abuts between the T-block 206 and the tooth clutch 205.

[0054] The front and rear adjustment of the cervical pillow 201 is as follows Figure 11 and Figure 12 As shown, the process is as follows: loosen the knob 203, the spring pushes tooth three 2052 and tooth four 1012 (at this time, tooth one 2051 and tooth two 2022 are actually separated, and the up and down positions can also be adjusted. This section focuses on the adjustment of the front and back positions, so the up and down position adjustment will not be expanded), so that the tooth clutch 205 and the bracket 101 are separated. At this time, operate the rotating handle 2093 to rotate the screw rod 2091. The rotation of the screw rod 2091 drives the T-block 206 to move forward and backward through the nut 2092. The forward and backward movement of the T-block 206 drives the connecting plate 202 to move forward and backward through the external threaded column 2062 and the knob 203, thereby realizing the forward and backward position adjustment of the cervical pillow 201. After the position is adjusted to the right position, tighten the knob 203. During the process of screwing in the knob 203, the tooth three 2052 on the tooth clutch 205 and the tooth four 1012 on the bracket 101 are engaged, thereby achieving fixation.

[0055] Preferably, the four teeth 1012 are arranged in a straight line in the front-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 slot 1011. The three teeth 2052 are arranged in a straight line in the front-back direction on the dog clutch 205, and there are two sets of three teeth 2052, which are arranged opposite the two sets of four teeth 1012. In this way, the dog clutch 205 can be engaged and fixed with the bracket 101 at any front-back position.

[0056] The cervical pillow 201 can be adjusted up and down as follows: Figure 13 and Figure 14 As shown, the process is as follows: loosen the knob 203, the connecting plate 202 is driven by the retaining spring 204 and moves to the side away from the tooth clutch 205, so that tooth one 2051 and tooth two 2022 are separated (at this time, tooth three 2052 and tooth four 1012 are also separated under the action of the spring, but the front and rear position cannot be adjusted without adjusting the screw assembly 209). At this time, the connecting plate 202 can be rotated around the convex 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 process of screwing in the knob 203, the tooth one 2051 on the tooth clutch 205 and the tooth two 2022 on the connecting plate 202 are engaged, thereby achieving fixation.

[0057] Preferably, the tooth 1 2051 is distributed in an annular shape on the surface of the tooth clutch 205 , and the tooth 2 2022 is distributed in an annular shape on the surface of the connecting plate 202 , thereby achieving a separation and engagement between the connecting plate 202 and the tooth clutch 205 at any circumferential angle.

[0058] Preferably, the base 1, cervical pillow 201, and rotating bracket 3, which come into contact with the human body, are wrapped with a flexible layer to enhance patient comfort. Furthermore, the cervical pillow includes a phototherapy module and a magnetic therapy module. The phototherapy module, such as an infrared irradiation module, can increase the temperature of human tissue, accelerate blood circulation, and promote the normal curve of the cervical spine. The magnetic therapy module's magnetic field can regulate the body's biomagnetic field, generate induced microcurrents, alter cell membranes, influence nerve conduction, improve microcirculation, and provide analgesic, anti-inflammatory, and immune-enhancing effects.

[0059] The above embodiments are only used to illustrate the concept of the present invention, and are not intended to limit the protection of the present invention. Any non-substantial changes to the present invention using this concept should fall within the scope of protection of the present invention.

Claims

1. A cervical vertebrae fixation device with a back pillow, mounted on a base, characterized in that: It includes a cervical pillow, an up-down position adjustment mechanism, and a front-back position adjustment mechanism; The axial middle part of the cervical pillow has an inwardly concave arc surface for fitting with the back of the human cervical spine, and each radial section at the axial position of the cervical pillow is an arc surface with a gradually changing curvature; the upper and lower position adjustment mechanism is used to adjust the upper and lower positions of the cervical pillow, and the front and back position adjustment mechanism is used to adjust the front and back positions of the cervical pillow.

2. A back-pillow type cervical vertebra fixation device according to claim 1, characterized in that: The up and down position adjustment mechanism includes a connecting plate, a dog clutch and a knob. Brackets are provided on the left and right sides of the base. The dog clutch is installed on the outside of the bracket. The side of the dog clutch away from the bracket is provided with a tooth, and an external threaded column protrudes in the middle of the side. One end of the connecting plate is rotatably connected to one end of the cervical pillow shaft, and the other end of the connecting plate is provided with an axial hole and a tooth 2 that can engage with the tooth 1. A convex shaft is provided in the middle of the knob, and a retaining spring groove is provided on the outer wall of the convex shaft. After the convex shaft passes through the axial hole, it is limited by the retaining spring, and an internal threaded hole that can be threadedly connected to the external threaded column is provided on the convex shaft.

3. A back-pillow type cervical vertebra fixation device according to claim 2, characterized in that: The first teeth are distributed in an annular shape on the surface of the tooth clutch, and the second teeth are distributed in an annular shape on the surface of the connecting plate.

4. The back-pillow type cervical vertebra fixation device according to claim 1, characterized in that: The front-to-back position adjustment mechanism includes a connecting plate, a tooth clutch, a knob, a T-block, and a screw assembly. Brackets are provided on the left and right sides of the base. The brackets are provided with a long slot with a T-shaped cross section and arranged in a front-to-back direction, with the long slot opening close to the outer side of the bracket. An externally threaded column is provided in the middle of the T-block, which is embedded in the long slot and can move forward and backward along the long slot. The screw assembly includes a screw rod installed on the bracket and arranged in the front and back directions, a rotating handle is provided at one end of the screw rod, a nut is threadedly connected to the screw rod, and the nut is fixed to the T-block for realizing the front and back movement of the T-block; The dog clutch is located outside the bracket, and a tooth three is provided on a side facing the bracket, a tooth four is provided on the outer side of the bracket and can engage with the tooth three, and a through hole one is opened in the middle of the dog clutch; One end of the connecting plate is rotatably connected to one end of the cervical pillow shaft, and the other end is installed with the knob. An internal threaded hole is provided in the middle of the knob. The external threaded column passes through the opening of the long slot and the middle through hole of the tooth clutch toward the outside of the bracket, and is connected to the internal threaded hole of the knob.

5. A back-pillow type cervical vertebra fixation device according to claim 4, characterized in that: It includes a movable screw and a push spring. The tooth clutch is provided with screw holes on both sides of the through hole 1. The T-block is provided with a through hole 2 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 2, and the threaded section is screwed into the screw hole of the tooth clutch. The push spring is sleeved outside the straight rod section and rests between the T-block and the tooth clutch.

6. The back-pillow type cervical vertebra fixation device according to claim 4, characterized in that: The tooth four is distributed in a straight line in the front-to-back direction on the bracket, and there are two groups of tooth four, which are respectively located on the upper and lower sides of the long slot opening; the tooth three is distributed in a straight line in the front-to-back direction on the tooth clutch, and there are two groups of tooth three and are arranged opposite to the two groups of tooth four.

7. The back-pillow type cervical vertebra fixation device according to claim 1, characterized in that: The outside of the cervical pillow is wrapped with a flexible layer.

8. The back-pillow type cervical vertebra fixation device according to claim 1, characterized in that: The cervical pillow is provided with a light therapy module and / or a magnetic therapy module.

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