Anterior cervical dilator with self-adaptive angle

Abstract

The invention relates to the technical field of medical equipment, in particular to an angle-adaptive anterior cervical dilator. An auxiliary plier body is connected with a main plier body. The plurality of supporting rods are mounted at respective working ends; the self-adaptive opening assembly is used for automatically adjusting and fixing according to the intervertebral space of a patient, and comprises a sliding adjusting part which is fixed on the main forceps body and is used for opening the main forceps body and the auxiliary forceps body in a semicircular rotating direction; the hydraulic triggering part is installed in the main clamp body and acts on the sliding adjusting part so that the main clamp body and the auxiliary clamp body can be locked after the cervical vertebra of the patient is opened. The clamping blocks are driven through the hydraulic action to lock the piston block located in the inner cavity of the clamp body, and then the main clamp body and the auxiliary clamp body fix the intervertebral space at the current opening distance; the clamping distance adjusting assembly is designed, the auxiliary supporting rod and the ratchet bar are combined with the locking block with the rack structure to fix the auxiliary supporting rod, and the fixing device has the advantages of being good in fixing effect, high in flexibility and convenient to use.

Description

Technical Field

[0001] The present invention relates to the technical field of medical equipment, and in particular to an adaptive angle anterior cervical vertebrae distractor. Background Art

[0002] Anterior cervical spine surgery is an important means of treating cervical degenerative diseases, trauma, tumors and other diseases. During the operation, a distraction device is needed to expand the cervical intervertebral space in the surgical area, thereby fully exposing the lesion site for the doctor to perform surgery, while relieving the compression factors and restoring the normal physiological curvature and stability of the cervical spine.

[0003] However, how to select the appropriate distraction distance based on the intervertebral space of the patient's cervical spine has always been a difficult problem in anterior cervical spine surgery. If the distraction distance of the intervertebral space is too large, it will lead to problems such as impaired spinal cord function, endplate damage, spinal canal stenosis and postoperative neck pain. Insufficient distraction height may lead to intervertebral disc herniation and poor decompression effect, and even form a pseudoarthrosis, increasing the risk of surgical failure. The existing distraction device cannot dynamically adjust the intervertebral space of the cervical spine of different patients. The distraction clamp needs to be manually opened and fixed with a fixed structure. This method often has poor stability and is cumbersome to operate, which can easily lead to surgical failure. Summary of the Invention

[0004] The present invention aims to at least improve one of the technical problems existing in the prior art. To this end, the present invention provides an adaptive angle anterior cervical distractor.

[0005] The technical solutions of the present invention are as follows: An adaptive angle anterior cervical vertebrae distractor, comprising: Main clamp body; A secondary clamp body, connected to the main clamp body; A plurality of support rods are installed at respective working ends of the main caliper body and the auxiliary caliper body; Adaptive distraction components, used to automatically adjust and fix according to the patient's intervertebral space, include: A sliding adjustment portion is fixed to the main caliper body, and the sliding adjustment portion is provided with an arc-shaped sliding groove for spreading the main caliper body and the auxiliary caliper body in a semicircular rotation direction; The hydraulic trigger part is installed in the main clamp body and acts on the sliding adjustment part to lock the main clamp body and the auxiliary clamp body after the patient's cervical spine is stretched.

[0006] In a possible technical solution, further, the main clamp body and the auxiliary clamp body are provided with a slide bar and a slide rail, and the spreader further includes: A clamping distance adjustment assembly comprises a plurality of slide bars, each slide bar being correspondingly slidably mounted on the main clamp body or the auxiliary clamp body; The slide bar groove is provided on the slide bar and cooperates with the slide bar rail to enable the clamping distance adjustment component to be slidably adjusted relative to the main caliper body or the auxiliary caliper body.

[0007] In a possible technical solution, further, the arcuate chute is a semi-circular chute as a whole, and a main slider is provided inside the arcuate chute, which is slidably connected to the arcuate chute, and the surface of the main slider away from the arcuate chute is a slider structure provided with a clamping groove; The sliding adjustment portion further includes: The auxiliary slider is installed in the middle of the auxiliary caliper body and is engaged with the engaging groove of the main slider, so that the auxiliary caliper body can rotate relative to the main caliper body with the arc-shaped slide groove as the rotation track.

[0008] In a possible technical solution, further, a first hydraulic chamber is provided in the main caliper body near the middle rotation point, and a liquid outlet on one side of the first hydraulic chamber faces the chute structure on the arc-shaped chute, and the hydraulic triggering part includes: An elastic telescopic tube is installed at the liquid outlet of the first hydraulic chamber, with one end away from the liquid outlet being fixedly connected to the main slider by welding or plugging; a piston block, installed in the first hydraulic chamber; The piston block return spring is installed on the side of the piston block away from the arc-shaped slide groove. When the main slider slides and stretches the elastic telescopic tube, it can draw hydraulic oil into the elastic telescopic tube and drive the piston block to slide along the first hydraulic chamber.

[0009] In a possible technical solution, further, the main caliper body near the working end is provided with a second hydraulic chamber, the second hydraulic chamber is filled with hydraulic oil, and the second hydraulic chamber near the side of the first hydraulic chamber is provided with two liquid outlets perpendicular to the entire cavity of the first hydraulic chamber, and the hydraulic triggering part further includes: A pressing block is installed at an opening close to the working end of the main pliers body; A pressing block reset spring, installed in the second hydraulic chamber, for resetting the pressing block; an elastic rotating shaft, the elastic rotating shaft being mounted inside the first hydraulic chamber on a side close to the second hydraulic chamber, the elastic rotating shaft being sleeved with a torsion spring fixed to the main caliper body, the elastic rotating shaft being able to rotate in the first hydraulic chamber and restoring the rotation angle by the elastic force of the torsion spring; One end of the connecting belt is sleeved on the elastic rotating shaft, and the other end is connected to the piston block. When the piston block slides under the action of the main slider and the elastic telescopic tube, it can pull the connecting belt and drive the elastic rotating shaft to rotate.

[0010] The clamping block is installed at the liquid outlet. When the patient's cervical vertebra is stretched, the main clamp body and the auxiliary clamp body gradually open, and the pressing block contacts the cervical vertebra. At this time, the pressing block slides into the second hydraulic chamber and squeezes the hydraulic oil inside, and then the oil pressure of the hydraulic oil pushes the two clamping blocks toward the midline.

[0011] In a possible technical solution, further, the clamping distance adjustment component includes: A plurality of slide bars, each slide bar is correspondingly mounted on the main caliper body or the auxiliary caliper body, and a mounting cavity is opened on one side of the slide bar; Two auxiliary support rods are correspondingly installed on the main clamp body and the auxiliary clamp body close to the working end; A locking mechanism is installed on the slide bar and the gripping ends of the main pliers body and the auxiliary pliers body away from the working end, and is used to adjust and fix the position between the auxiliary support rod and the support rod.

[0012] In a possible technical solution, further, the locking mechanism includes: A ratchet bar is installed on the main pliers body or the auxiliary pliers body; The locking tooth block is slidably installed in the installation cavity and is engaged with the ratchet bar.

[0013] In a possible technical solution, further, the locking mechanism further includes: A clamping block is mounted on the sliding rod at a side away from the main caliper body or the auxiliary caliper body; Locking gear block return spring; A set of telescopic shafts are arranged on both sides of the mounting cavity, with the telescopic portion being mounted on the side of the locking tooth block opposite to the rack structure, and the telescopic shaft sleeve is provided with the locking tooth block return spring for pushing the locking tooth block out of the mounting cavity; A sliding connection block is installed between the two telescopic shafts on the locking tooth block, and the sliding connection block passes through the installation cavity on a side away from the ratchet bar; A snap-fit ​​hole is provided on the sliding connection block and is used for the snap-fit ​​block to pass through.

[0014] In a possible technical solution, further, baffles are provided on both sides of the ratchet bar to prevent the ratchet bar from contacting the patient's body parts.

[0015] In a possible technical solution, further, protrusions are provided at the bottom of the auxiliary support rod and the support rod to improve the fixing effect.

[0016] The adaptive angle anterior cervical distractor according to the present invention has the following beneficial effects: 1. When the present invention is in use, the main clamp body and the auxiliary clamp body are rotated and opened along the arc-shaped slide groove of the sliding adjustment part, and the main slider slides and stretches the elastic telescopic tube to increase the liquid pressure inside the first hydraulic chamber, and drives the piston block to slide and stretch the connecting belt on the elastic rotating shaft. When the pressing block contacts the cervical vertebra, it slides into the second hydraulic chamber, and then drives the clamping block to clamp and fix the connecting belt through the hydraulic action, so that the main clamp body and the auxiliary clamp body form a locking state between the first hydraulic chamber and the second hydraulic chamber, so that the patient's cervical spine surgical site is opened at the maximum sliding distance of the pressing block, so that the support rods on the main clamp body and the auxiliary clamp body can support the patient's cervical vertebra at a safe distance and maintain the supporting and fixing effect of the cervical vertebra, with good stability.

[0017] 2. By designing a clamping distance adjustment component, when the patient's cervical vertebra is stretched, the sliding rod is slid along the main clamp body or the auxiliary clamp body to adjust the distance between the support rod and the auxiliary support rod, and the sliding rod is fixed with a clamping block, so that the present invention can adapt to different patient cervical vertebra sizes and be adjusted. The support rod and the auxiliary support rod are clamped to both sides of the patient's cervical vertebra for further stretching and fixation, which has the advantage of strong flexibility.

[0018] 3. The overall structure of the present invention is simple and easy to manufacture. When the patient's cervical vertebra is stretched, the present invention only needs to open the main clamp body and the auxiliary clamp body, and then the main clamp body and the auxiliary clamp body can be triggered by the pressing block to contact the bone on one side of the cervical vertebra to stretch the cervical vertebrae. The two clamp bodies are locked to maintain the stretched state of the cervical vertebrae. Compared with the existing device that needs to use a rack or other structure for clamping after stretching, the present invention has the advantage of being easy to use.

[0019] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned by practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 2. It is a schematic structural diagram of an adaptive angle anterior cervical distractor according to an embodiment of the present invention; Figure 2 2 is a schematic structural diagram of the adaptive angle anterior cervical distractor according to an embodiment of the present invention from another perspective; Figure 3 2. It is a schematic diagram of the structure of the adaptive angle anterior cervical distractor after distraction according to an embodiment of the present invention; Figure 4 yes Figure 2 A magnified schematic diagram of part A; Figure 5 yes Figure 3 An enlarged schematic diagram of part B; Figure 6 2. It is a structural schematic diagram of the main jaw body of the adaptive angle anterior cervical distractor according to an embodiment of the present invention; Figure 7 is a partial cross-sectional schematic diagram of the main jaw body of the adaptive angle anterior cervical distractor according to an embodiment of the present invention; Figure 8 yes Figure 7 An enlarged schematic diagram of part C; Figure 9 yes Figure 7 An enlarged schematic diagram of part D; Figure 10 yes Figure 7 An enlarged schematic diagram of part E; Figure 11 is a schematic diagram of the second hydraulic chamber of the adaptive angle anterior cervical distractor; Figure 12 This is a schematic diagram of the locking mechanism of the adaptive angle anterior cervical distractor; Figure 13 This is a schematic diagram of the connection between the elastic telescopic tube and the main slider of the adaptive angle anterior cervical distractor; Figure 14 This is a schematic diagram of the position of the slide rod and slide groove of the adaptive angle anterior cervical distractor.

[0022] Reference numerals: 1. Main clamp body; 2. Auxiliary clamp body; 3. Support rod; 4. Adaptive expansion assembly; 401. Sliding adjustment unit; 4011. Arc-shaped slide; 4012. Main slide; 4013. Auxiliary slide; 402. Hydraulic trigger unit; 4021. First hydraulic chamber; 4022. Elastic telescopic tube; 4023. Piston block; 4024. Piston block return spring; 4025. Second hydraulic chamber; 4026. Pressing block; 4027. Pressing block return spring; 4028. Elastic rotating shaft; 4029. Connecting belt; 4030. Clamping block; 5. Snap-fit ​​distance adjustment assembly; 501. Sliding rod; 502. Auxiliary support rod; 503. Locking mechanism; 5031. Ratchet bar; 5032. Locking tooth block; 5033. Snap-fit ​​block; 5034. Locking tooth block return spring; 5035. Telescopic shaft; 5036. Sliding connection block; 5037. Snap-fit ​​hole; 6. Slide rails; 7. Slide rod chute; 8. Articulated shaft. DETAILED DESCRIPTION

[0023] The embodiments of the present invention are described in detail below. The embodiments described with reference to the accompanying drawings are exemplary. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0024] It should be noted that when an element is referred to as being “fixed to” another element, it may be directly on the other element or there may be an intermediate element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or there may be an intermediate element.

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the art to which this invention pertains. The terms used in this specification of the present invention are for the purpose of describing specific embodiments only and are not intended to limit the present invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0026] In the specification, claims, and accompanying drawings of this application, the terms "first," "second," "third," and the like are used to distinguish different objects and are not used to describe a particular order. Furthermore, the terms "including," "comprising," "having," and any variations thereof are intended to cover non-exclusive inclusions. For example, a list of steps or elements may be included, or alternatively, steps or elements not listed may be included, or other steps or elements may be included that are inherent to the process, method, product, or apparatus.

[0027] Only portions relevant to the present application are shown in the accompanying drawings, not all of them. Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flow charts. Although the flow charts describe the various operations (or steps) as sequential processes, many of the operations can be performed in parallel, concurrently, or simultaneously. In addition, the order of the various operations can be rearranged. The process can be terminated when its operations are completed, but can also have additional steps not included in the accompanying drawings. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0028] As used in this specification, the terms "component," "module," "system," "unit," and the like are used to refer to computer-related entities, hardware, firmware, a combination of hardware and software, software, or software in execution. For example, a unit can be, but is not limited to, a process running on a processor, a processor, an object, an executable file, an execution thread, a program, and / or distributed between two or more computers. In addition, these units can be executed from various computer-readable media having various data structures stored thereon. Units can communicate, for example, via local and / or remote processes based on signals having one or more data packets (e.g., data from a second unit interacting with another unit in a local system, a distributed system, and / or a network, such as the Internet, which interacts with other systems via signals).

[0029] Example 1 This embodiment provides an adaptive angle anterior cervical distractor, which includes: Main clamp body 1; The auxiliary clamp body 2 is connected to the main clamp body 1; it should be noted that, in this embodiment, the auxiliary clamp body 2 is located above the main clamp body 1, and the main clamp body 1 and the auxiliary clamp body 2 are both lightweight metal slender rods. The overall structure of the two is relatively close, and both ends are provided with a circular gripping end that can pass through the fingers, and a working end for spreading the patient's cervical spine during anterior cervical spine surgery. The main clamp body 1 and the auxiliary clamp body 2 are rotatably connected in a cross-shaped manner by setting a hinge shaft 8 in the middle; the main clamp body 1 and the auxiliary clamp body 2 are provided with a slide bar rail 6.

[0030] A plurality of support rods 3 are installed at the respective working ends of the main caliper body 1 and the auxiliary caliper body 2; The adaptive distraction component 4 is used for automatically adjusting and fixing according to the patient's intervertebral space, and includes: The sliding adjustment portion 401 is fixed to the main jaw body 1 and is provided with an arcuate slot 4011 for spreading the main jaw body 1 and the auxiliary jaw body 2 in a semicircular rotation direction. The arcuate slot 4011 is a semicircular slot as a whole, and is provided with a main slider 4012 therein, which is slidably connected to the arcuate slot 4011. The surface of the main slider 4012 away from the arcuate slot 4011 is a slider structure provided with a snap-fit ​​slot. The auxiliary slider 4013 is installed in the middle of the auxiliary clamp body 2 and is engaged with the engaging groove of the main slider 4012, so that the auxiliary clamp body 2 can rotate relative to the main clamp body 1 along the arc-shaped slide groove 4011. The hydraulic triggering part 402 is installed in the main jaw body 1 and acts on the sliding adjustment part 401 to lock the main jaw body 1 and the auxiliary jaw body 2 after the patient's cervical spine is distracted.

[0031] The clamping distance adjustment component 5 has a plurality of slide bars 501, and each slide bar 501 is slidably mounted on the main caliper body 1 or the auxiliary caliper body 2; The slide bar slot 7 is provided on the slide bar 501 and cooperates with the slide bar rail 6 to enable the clamping distance adjustment component 5 to be slidably adjusted relative to the main caliper body 1 or the auxiliary caliper body 2 .

[0032] It should be noted that in this embodiment, a secondary slider 4013 is fixed near the middle rotation point of the secondary caliper body 2 by welding or threaded connection, and the secondary slider 4013 is clamped in the clamping groove on the upper part of the main slider 4012, so that the secondary caliper body 2 can rotate relative to the main caliper body 1 with the arc-shaped slide groove 4011 as the rotation trajectory.

[0033] It should be noted that, in this embodiment, the hydraulic triggering unit 402 can be roughly divided into two parts by the rod body of the main caliper body 1. The first part is the main caliper body 1 near the middle rotation point, which has a first hydraulic chamber 4021, and a liquid outlet on one side of the first hydraulic chamber 4021 facing the chute structure on the arc chute 4011. The hydraulic triggering unit 402 includes: The elastic telescopic tube 4022 is installed at the liquid outlet of the first hydraulic chamber 4021. The elastic telescopic tube 4022 can refer to the more common multi-section metal telescopic hose products. The elastic telescopic tube 4022 is arranged along the slide structure on the arc-shaped slide 4011, and the end away from the liquid outlet is fixedly connected to the main slider 4012 by welding or plug-in fixation. In this embodiment, the elastic telescopic tube 4022 is installed at the liquid outlet of the first hydraulic chamber 4021 by welding or plug-in fixation. When the auxiliary clamp body 2 rotates relative to the main clamp body 1, the hydraulic oil filled in the first hydraulic chamber 4021 can be sucked out by sliding the main slider 4012 in combination with the elastic telescopic tube 4022, that is, a negative pressure effect can be formed in the first hydraulic chamber 4021. The piston block 4023 is installed in the first hydraulic chamber 4021 , wherein the first hydraulic chamber 4021 and the side of the piston block 4023 close to the arc-shaped slide groove 4011 are filled with hydraulic oil; The piston block return spring 4024 is installed on the side of the piston block 4023 away from the arc-shaped slide groove 4011. When the main slider 4012 slides and stretches the elastic telescopic tube 4022, it can draw hydraulic oil into the elastic telescopic tube 4022 and drive the piston block 4023 to slide along the first hydraulic chamber 4021.

[0034] The second part is the main pliers body 1 near the working end, which is provided with a second hydraulic chamber 4025. The second hydraulic chamber 4025 is located above the support rod 3. The second hydraulic chamber 4025 is filled with hydraulic oil, and the second hydraulic chamber 4025 near the first hydraulic chamber 4021 is provided with two liquid outlets perpendicular to the entire cavity of the first hydraulic chamber 4021. The hydraulic triggering part 402 also includes: A pressing block 4026 is installed near the opening of the working end of the main caliper body 1, wherein the second hydraulic chamber 4025 is slidably connected to the pressing block 4026, and the pressing block 4026 is tightly fitted with the opening of the second hydraulic chamber 4025; A pressing block reset spring 4027 is installed in the second hydraulic chamber 4025 and is used to reset the pressing block 4026; An elastic shaft 4028 is installed inside the first hydraulic chamber 4021 on a side close to the second hydraulic chamber 4025. A torsion spring fixed to the main caliper body 1 is sleeved on the elastic shaft 4028. The elastic shaft 4028 can rotate in the first hydraulic chamber 4021 and restore its rotation angle through the elastic force of the torsion spring. The connecting belt 4029 is a slender belt structure with a certain degree of elasticity. One end is mounted on the elastic shaft 4028, and the other end is connected to the piston block 4023. When the piston block 4023 slides under the action of the main slider 4012 and the elastic telescopic tube 4022, it can pull the connecting belt 4029, thereby driving the elastic shaft 4028 to rotate.

[0035] The clamping block 4030 is installed at the liquid outlet. When the patient's cervical vertebra is stretched, the main clamp body 1 and the auxiliary clamp body 2 are gradually opened, and the pressing block 4026 is in contact with the cervical vertebra. At this time, the pressing block 4026 slides into the second hydraulic chamber 4025 and squeezes the hydraulic oil inside, and then the two clamping blocks 4030 are pushed close to the midline by the oil pressure of the hydraulic oil.

[0036] When the main jaw body 1 and the auxiliary jaw body 2 are relatively opened, the main slider 4012 can be driven to slide along the arc-shaped slide groove 4011, and the piston block 4023 can be driven to slide along the first hydraulic chamber 4021 through the elastic telescopic tube 4022, and then the elastic shaft 4028 can be driven to rotate through the connecting belt 4029. The main jaw body 1 and the auxiliary jaw body 2 are gradually opened, and the pressing block 4026 contacts the patient's cervical vertebrae and slides into the second hydraulic chamber 4025. Then, the clamping block 4030 is made to slide close to the midline by the hydraulic action. A spring is provided on the surface of the clamping block 4030. The serrated pattern then clamps the connecting belt 4029 being stretched, thereby locking the main clamp body 1 and the auxiliary clamp body 2 at the current opening angle to open the patient's cervical spine. At this time, the length of the pressing block 4026 extended into the second hydraulic chamber 4025 can be regarded as the distance of opening the patient's cervical spine. Therefore, in some embodiments, the overall length of the pressing block 4026 can be replaced, or the amount of hydraulic oil filled in the second hydraulic chamber 4025 can be adjusted to adjust the degree of opening of the patient's cervical spine.

[0037] It should be noted that, in this embodiment, the clamping distance adjustment component 5 includes: Multiple slide bars 501, each slide bar 501 is correspondingly mounted on the main caliper body 1 or the auxiliary caliper body 2, and a mounting cavity is opened on one side of the slide bar 501; Two auxiliary support rods 502 are correspondingly installed on the main pliers body 1 and the auxiliary pliers body 2 near the working end. The auxiliary support rods 502 and the support rod 3 are similar in overall shape, both of which are slender cylindrical rod structures; The locking mechanism 503 is installed on the slide bar 501 and the gripping ends of the main pliers body 1 and the auxiliary pliers body 2 away from the working end, and is used to adjust and fix the position between the auxiliary support rod 502 and the support rod 3.

[0038] It should be noted that, in this embodiment, the locking mechanism 503 includes: The ratchet bar 5031 is installed on the main pliers body 1 or the auxiliary pliers body 2; The locking tooth block 5032 is slidably mounted in the mounting cavity and engaged with the ratchet bar 5031. It should be noted that the mounting cavity is located on the side of the slide bar 501 close to the ratchet bar 5031, wherein the cross-sectional dimensions of the locking tooth block 5032 match the mounting cavity; It should be noted that, in this embodiment, two baffle structures are fixed on the upper and lower sides of the ratchet bar 5031 to prevent the ratchet bar 5031 from contacting the patient's body parts.

[0039] It should be noted that, in this embodiment, protrusions are further provided at the bottom of the auxiliary support rod 502 and the support rod 3 to improve the fixing effect.

[0040] It should be noted that in this embodiment, a slender sliding rod rail 6 is fixed on the side of the main caliper body 1 away from the arc-shaped slide groove 4011, or on the side of the auxiliary caliper body 2 close to the arc-shaped slide groove 4011. The sliding rod 501 is a slender rod as a whole, and a sliding rod groove 7 is provided on one side of the sliding rod rail 6 on the main caliper body 1 or the auxiliary caliper body 2, and the overall length of the sliding rod rail 6 is smaller than the sliding rod groove 7. Therefore, the sliding rod 501 can be slidably adjusted relative to the main caliper body 1 or the auxiliary caliper body 2.

[0041] Example 2 This embodiment makes further improvements on the above embodiment and provides an adaptive angle anterior cervical distractor, wherein the locking mechanism 503 further includes: The clamping block 5033 is installed on the sliding rod 501 at a side away from the main caliper body 1 or the auxiliary caliper body 2; Locking tooth block return spring 5034; A set of telescopic shafts 5035 are provided on both sides of the mounting cavity, with the telescopic portion being mounted on the side of the locking tooth block 5032 opposite the rack structure. The telescopic shafts 5035 are sleeved with the locking tooth block return spring 5034 for pushing the locking tooth block 5032 out of the mounting cavity. The sliding connection block 5036 is installed between the two telescopic shafts 5035 on the locking tooth block 5032. The sliding connection block 5036 passes through the installation cavity on the side away from the ratchet bar 5031. A rectangular parallelepiped engaging hole 5037 is provided on the sliding connecting block 5036 for the engaging block 5033 to pass through.

[0042] When distracting the patient's cervical vertebra, the sliding bar 501 can be slidably adjusted along the main clamp body 1 and the auxiliary clamp body 2 according to the size of the patient's cervical vertebra on both sides. When adjusting, the sliding connecting block 5035 can be pulled to separate the locking tooth block 5032 from the ratchet bar 5031, and the sliding connecting block 5035 can be released after the adjustment is completed, so that the locking tooth block 5032 is engaged with the ratchet bar 5031, and then the engaging block 5033 is pushed and inserted into the engaging hole 5037 on the sliding connecting block 5035, so that the locking tooth block 5032 is fixed to the ratchet bar 5031, and then the sliding bar 501 is fixed to the main clamp body 1 or the auxiliary clamp body 2, so that the auxiliary support rod 502 and the support rod 3 can be engaged to both sides of the patient's cervical vertebra, so as to assist in distracting the surgical site of the patient's cervical vertebra.

[0043] This embodiment provides a method for using the adaptive angle anterior cervical distractor of the above embodiment, comprising the following steps: S1. According to the overall size of the patient's cervical spine, the slide bar 501 is adjusted synchronously along the main jaw body 1 or the auxiliary jaw body 2 to adjust the distance between the support rod 3 and the auxiliary support rod 502 to a distance suitable for clamping to both sides of the patient's cervical spine, and the clamping block 5033 is pushed into the clamping hole 5037 to lock it; S2. Place the support rods 3 and auxiliary support rods 502 at the working ends of the main jaw body 1 and auxiliary jaw body 2 along both sides of the patient's cervical vertebrae, and make the auxiliary jaw body 2 fit against one side of the patient's cervical vertebrae; S3. Open the main jaw body 1 and the auxiliary jaw body 2 through the gripping end. When the pressing block 4026 on the main jaw body 1 contacts the patient's cervical vertebrae, it can slide into the second hydraulic chamber 4025 and drive the clamping block 4030 through the hydraulic action to clamp and fix the connecting belt 4029, thereby locking the rotation between the main jaw body 1 and the auxiliary jaw body 2. The maximum distance that the pressing block 4026 slides into the second hydraulic chamber 4025 is the distance that the main jaw body 1 and the auxiliary jaw body 2 spread apart the cervical vertebrae.

[0044] The present invention also provides the following specific implementation cases to verify the effects of the present invention: Case 1: In this case, the number of the opener of the present invention used is one. When opening the patient's cervical vertebra, the slide bar 501 is first slid and adjusted along the main jaw body 1 or the auxiliary jaw body 2 according to the distance between the two sides of the patient's cervical vertebra. Then, the slide bar 501 is locked relative to the main jaw body 1 or the auxiliary jaw body 2 using the locking mechanism 503. The opener is then clamped to the two sides of the patient's cervical vertebra using the support rod 3 and the auxiliary support rod 502. Then, the main jaw body 1 and the auxiliary jaw body 2 are opened. When the main clamp body 1 and the auxiliary clamp body 2 are opened, the support rod 3 and the auxiliary support rod 502 at the working end gradually fit together with the upper and lower sides of the cervical vertebrae. When the pressing block 4026 on the main clamp body 1 fits together with the cervical vertebrae and slides into the second hydraulic chamber 4025, the connecting belt 4029 can be clamped and fixed by the clamping block 4030. At this time, the sliding of the main slider 4012 is locked under the hydraulic action inside the first hydraulic chamber 4021, that is, the relative rotation between the main clamp body 1 and the auxiliary clamp body 2 is locked, thereby stretching the patient's cervical vertebra to one side so that surgery can be performed on the middle part of the cervical vertebra or the side of the stretched side.

[0045] Case 2: In this case, the number of expanders used in the present invention is two. The difference is that the clamping distance adjustment component 5, that is, the structure including the slide bar 501, can be removed. At this time, the main clamp body 1 and the auxiliary clamp body 2 of the two expanders can be extended into the two sides of the cervical spine surgery site, and the expanders on both sides can be stretched open. When the pressing blocks 4026 on both sides contact the cervical vertebrae and extend into the second hydraulic chamber 4025, the main clamp body 1 and the auxiliary clamp body 2 can be locked in the same manner as in Case 1. Since the expanders in this case are arranged on both sides of the cervical vertebrae, the cervical vertebrae can be longitudinally stretched through both sides so that surgery can be performed on the middle part of the patient's cervical spine.

[0046] The adaptive angle anterior cervical distractor according to the present invention has the following beneficial effects: 1. When the present invention is in use, the main clamp body and the auxiliary clamp body are rotated and opened along the arc-shaped slide groove of the sliding adjustment part, and the main slider slides and stretches the elastic telescopic tube to increase the liquid pressure inside the first hydraulic chamber, and drives the piston block to slide and stretch the connecting belt on the elastic rotating shaft. When the pressing block contacts the cervical vertebra, it slides into the second hydraulic chamber, and then drives the clamping block to clamp and fix the connecting belt through the hydraulic action, so that the main clamp body and the auxiliary clamp body form a locking state between the first hydraulic chamber and the second hydraulic chamber, so that the patient's cervical spine surgical site is opened at the maximum sliding distance of the pressing block, so that the support rods on the main clamp body and the auxiliary clamp body can support the patient's cervical vertebra at a safe distance and maintain the supporting and fixing effect of the cervical vertebra, with good stability.

[0047] 2. By designing a clamping distance adjustment component, when the patient's cervical vertebra is stretched, the sliding rod is slid along the main clamp body or the auxiliary clamp body to adjust the distance between the support rod and the auxiliary support rod, and the sliding rod is fixed with a clamping block, so that the present invention can adapt to different patient cervical vertebra sizes and be adjusted. The support rod and the auxiliary support rod are clamped to both sides of the patient's cervical vertebra for further stretching and fixation, which has the advantage of strong flexibility.

[0048] 3. The overall structure of the present invention is simple and easy to manufacture. When the patient's cervical vertebra is stretched, the present invention only needs to open the main clamp body and the auxiliary clamp body, and then the main clamp body and the auxiliary clamp body can be triggered by the pressing block to contact the bone on one side of the cervical vertebra to stretch the cervical vertebrae. The two clamp bodies are locked to maintain the stretched state of the cervical vertebrae. Compared with the existing device that needs to use a rack or other structure for clamping after stretching, the present invention has the advantage of being easy to use.

[0049] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore should not be understood as a limitation to the invention.

[0050] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "example," "specific example," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0051] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all of the embodiments. Mentioning "embodiment" in this article means that the specific features, structures or characteristics described in conjunction with the embodiment may be included in at least one embodiment of the present embodiment application. The appearance of this phrase in various positions in the specification does not necessarily mean that they are all the same embodiments, nor are they independent or alternative embodiments that are mutually exclusive with other embodiments. It can be understood explicitly and implicitly by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without making creative work are within the scope of protection of this application.

[0052] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the claims and their equivalents.

Claims

1. An adaptive angle anterior cervical distractor, characterized in that: include: Main clamp body (1); A secondary clamp body (2) connected to the main clamp body (1); A plurality of support rods (3) are mounted on respective working ends of the main pliers body (1) and the auxiliary pliers body (2); An adaptive distraction assembly (4) for automatically adjusting and fixing according to the patient's intervertebral space, comprising: A sliding adjustment portion (401) is fixed to the main pliers body (1), and the sliding adjustment portion (401) is provided with an arc-shaped sliding groove (4011) for spreading the main pliers body (1) and the auxiliary pliers body (2) in a semicircular rotation direction; A hydraulic triggering portion (402) is installed in the main clamp body (1) and acts on the sliding adjustment portion (401) to lock the main clamp body (1) and the auxiliary clamp body (2) after the patient's cervical spine is stretched.

2. The adaptive angle anterior cervical distractor according to claim 1, characterized in that: The main clamp body (1) and the auxiliary clamp body (2) are provided with a slide bar and a slide rail (6), and the spreader further comprises: The clamping distance adjustment component (5) has a plurality of slide bars (501), and each slide bar (501) is correspondingly slidably mounted on the main clamp body (1) or the auxiliary clamp body (2); The slide bar groove (7) is provided on the slide bar (501) and cooperates with the slide bar rail (6).

3. The adaptive angle anterior cervical distractor according to claim 1, characterized in that: A main slider (4012) is provided in the arc-shaped slide groove (4011) and is slidably connected to the arc-shaped slide groove (4011). The surface of the main slider (4012) is a slider structure provided with a clamping groove. The sliding adjustment portion (401) further includes: The auxiliary slider (4013) is installed in the middle of the auxiliary clamp body (2) and is engaged with the engaging groove of the main slider (4012).

4. The adaptive angle anterior cervical distractor according to claim 1, characterized in that: The main caliper body (1) near the middle rotation point is provided with a first hydraulic chamber (4021), a liquid outlet on one side of which faces the chute structure on the arc-shaped chute (4011), and the hydraulic triggering part (402) includes: An elastic telescopic tube (4022) is installed at the liquid outlet of the first hydraulic chamber (4021), and one end away from the liquid outlet is fixedly connected to the main slider (4012); A piston block (4023) is installed in the first hydraulic chamber (4021); A piston block return spring (4024) is installed on one side of the piston block (4023).

5. The adaptive angle anterior cervical distractor according to claim 1, characterized in that: The main pliers body (1) near the working end is provided with a second hydraulic chamber (4025), and the second hydraulic chamber (4025) near the first hydraulic chamber (4021) is provided with two liquid outlets perpendicular to the entire cavity of the first hydraulic chamber (4021). The hydraulic triggering portion (402) further includes: A pressing block (4026) is installed near the opening of the working end of the main clamp body (1); A pressing block return spring (4027) installed in the second hydraulic chamber (4025); An elastic rotating shaft (4028) is installed in the first hydraulic chamber (4021); A connecting belt (4029), one end of which is sleeved on the elastic rotating shaft (4028) and the other end of which is connected to the piston block (4023); The clamping block (4030) is installed at the liquid outlet.

6. The adaptive angle anterior cervical distractor according to claim 2, characterized in that: The clamping distance adjustment component (5) comprises: A plurality of slide rods (501), each slide rod (501) is correspondingly mounted on the main pliers body (1) or the auxiliary pliers body (2), and a mounting cavity is provided on one side of the slide rod (501); Two auxiliary support rods (502) are mounted on the main clamp body (1) and the auxiliary clamp body (2) respectively; A locking mechanism (503) is mounted on the slide bar (501) and the gripping ends of the main pliers body (1) and the auxiliary pliers body (2) away from the working end.

7. The adaptive angle anterior cervical distractor according to claim 6, characterized in that: The locking mechanism (503) comprises: A ratchet bar (5031) is mounted on the main pliers body (1) or the auxiliary pliers body (2); The locking tooth block (5032) is slidably mounted in the mounting cavity and is engaged with the ratchet bar (5031).

8. The adaptive angle anterior cervical distractor according to claim 6, characterized in that: The locking mechanism (503) further comprises: A clamping block (5033) is mounted on the sliding rod (501) at a side away from the main clamp body (1) or the auxiliary clamp body (2); Locking gear return spring (5034); a set of telescopic shafts (5035) arranged on both sides of the installation cavity, wherein the telescopic portion is installed on the side of the locking tooth block (5032) opposite to the rack structure, and the telescopic shafts (5035) are sleeved with the locking tooth block return spring (5034); A sliding connection block (5036) is installed between the two telescopic shafts (5035) on the locking tooth block (5032), and the sliding connection block (5036) passes through one side of the installation cavity; The snap-fitting hole (5037) is formed on the sliding connection block (5036).

9. The adaptive angle anterior cervical distractor according to claim 7, characterized in that: Baffles are provided on both sides of the ratchet bar (5031).

10. The adaptive angle anterior cervical distractor according to claim 6, characterized in that: Protrusions are also provided at the bottom of the auxiliary support rod (502) and the support rod (3).

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