Adjustable semi-vertebral plate operation automatic retractor for spine surgery

Abstract

The invention provides an adjustable semi-vertebral plate operation automatic retractor for spine surgery, and belongs to the technical field of semi-vertebral plate operation retractors. The retractor comprises a handle, one side of the handle is fixedly connected with a distraction rod, the side, away from the handle, of the distraction rod is fixedly connected with a front end hook, the bottom of the distraction rod is provided with a retraction rod, and the retraction rod is provided with a first light-weight groove. According to the invention, the number of the retraction rods mounted on the distraction rod and the distance between the retraction rods can be quickly adjusted by arranging the mounting adjusting mechanism, and the retraction rods with corresponding sizes are quickly selected according to the specific use condition on site, and then are quickly and stably mounted on the distraction rod for use, so that the distraction rod can be quickly and stably mounted on the distraction rod for use. The application range of the device is wide, the practicability of the device is good, use is convenient and fast, and the auxiliary opening mechanism can assist opening operation of the main body of the device.

Description

Technical Field

[0001] The present invention relates to the technical field of semi-laminectomy surgical retractors, and particularly to an adjustable automatic semi-laminectomy surgical retractor for spinal surgery. Background Art

[0002] A retractor, also known as a retractor hook, is used to retract tissues, expose the surgical field, and facilitate exploration and operation. It can be divided into two categories: handheld retractor hooks and automatic retractor hooks. There are various specifications in different shapes and sizes, and a suitable retractor hook can be selected according to the surgical needs.

[0003] Currently, there is no dedicated retractor for semi-laminectomy surgery in the medical device market and clinical use. Most of the retractors used are general retractors for posterior total laminectomy. In total laminectomy surgery, since the muscles on both sides are stripped, an automatic retractor with a symmetrical retracting structure can symmetrically retract the muscles on both sides to fully expose the lamina and the structures within the spinal canal. However, in semi-laminectomy surgery, one side is soft tissue and the other side is the bony structure of the spinous process. The pulling forces on both sides for retraction are asymmetric, and the inner spinous process is relatively smooth, so the hook of the retractor cannot accurately catch the spinous process. On the other hand, the depths on the inner and outer sides of semi-laminectomy surgery are different, and the depths of the retracting structures required by the retractor are also different. Most of the retracting structures of traditional posterior spinal laminectomy retractors are of the same length. Therefore, traditional posterior spinal retractors cannot be well applied to semi-laminectomy surgery. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide an adjustable automatic semi-laminectomy surgical retractor for spinal surgery to solve the problem that there is currently no dedicated retractor for semi-laminectomy surgery and the existing total laminectomy surgical retractor is not suitable for the retracting operation of semi-laminectomy surgery.

[0005] To solve the above technical problem, the present invention provides the following technical solutions:

[0006] An adjustable automatic semi-laminectomy surgical retractor for spinal surgery includes a handle. One side of the handle is fixedly connected with a spreading rod. One side of the spreading rod away from the handle is fixedly connected with a front hook. Teeth are fixedly connected to the spreading rod. A retracting rod is installed at the bottom of the spreading rod, and a first lightweight groove is formed in the retracting rod; an installation and adjustment mechanism is used to install the retracting rod on the spreading rod and for the position adjustment of the retracting rod, and the installation and adjustment mechanism is connected to the retracting rod; an auxiliary spreading mechanism is used to assist the retracting rod in opening the surgical incision of the patient, and the auxiliary spreading mechanism is connected to the installation and adjustment mechanism.

[0007] Optionally, the installation and adjustment mechanism includes a mounting block installed on the retractor rod. A limiting piece is installed on one inner wall of the mounting block. An installation groove is formed on the mounting block. A first cavity adapted to the shape of the tooth is formed on the mounting block. A second cavity is formed in the limiting piece. A limiting block is installed on one side of the mounting block. A clamping block adapted to the shape of the limiting piece is fixedly connected to one side of the limiting block.

[0008] Optionally, the limiting piece is M-shaped. Fifth weakening parts are formed on both sides of the limiting piece. A first weakening part is formed in the middle of the limiting piece.

[0009] Optionally, a buffer cavity is formed on one side of the limiting piece close to the first weakening part. An activity cavity adapted to the shape of the limiting piece is formed in the mounting block.

[0010] Optionally, concave parts are formed on both sides of the top of the limiting block. A second lightweight groove is formed on the limiting block. Second weakening parts are formed on both sides of the bottom of the limiting block.

[0011] Optionally, the auxiliary retracting mechanism includes a mounting piece installed on the installation and adjustment mechanism. A first insertion block adapted to the shape of the second cavity is fixedly connected to the bottom of the mounting piece. A second insertion block adapted to the shape of the buffer cavity is fixedly connected to the bottom of the mounting piece. A retracting piece is installed between the two mounting pieces. A retracting auxiliary piece is fixedly connected to the bottom of the retracting piece.

[0012] Optionally, the bottom edges of the first insertion block and the second insertion block are both arc-shaped.

[0013] Optionally, the retracting piece is an arc-shaped structure protruding away from the center of the retractor rod. A third weakening part is provided on one side of the retracting piece close to the retracting auxiliary piece.

[0014] Optionally, a side bladder is installed on one side of the retractor rod. Two limiting strips are fixedly connected to one side of the mounting block. A limiting groove adapted to the shape of the limiting strips is formed on the side bladder.

[0015] Optionally, the cross-section of the limiting strip is C-shaped. A guiding part is provided on one side of the limiting strip away from the mounting block. A fourth weakening part is formed on one side of the limiting strip close to the guiding part.

[0016] Compared with the prior art, the present invention has at least the following beneficial effects:

[0017] In the above scheme, the number of retraction rods installed on the expansion rod and the distance between each retraction rod can be quickly adjusted by setting up an installation adjustment mechanism, and after quickly selecting the retraction rod of the corresponding size according to the specific usage situation on site, the retraction rod is quickly and stably installed on the expansion rod for use, so that the application range of the device is relatively wide, and the auxiliary expansion mechanism can also assist the expansion operation of the main body of the device, so that the device can better open the surgical opening completely, and then the expansion operation can be completed with as few surgical expansion instruments as possible. It is not only convenient to operate, but also saves manpower to a certain extent, and correspondingly increases the work efficiency of the surgical operation. The coordinated use of the structures further makes the use effect of the device better.

[0018] The device is a retractor for hemi-laminectomy with a bilaterally detachable and adjustable retractor mechanism, which provides better exposure for posterior hemi-laminectomy in spinal cord and spine surgery. The device can select retractor rods of different numbers and depths according to different incision lengths and depths to obtain better exposure effects.

[0019] In summary, the device can be flexibly adjusted on-site according to individual differences of patients, different incision depths, different lesion sizes, and different incision lengths by installing an adjustment mechanism and an auxiliary expansion mechanism and coordinating the various components therein, thereby making the device more widely applicable. In addition, the device has a simple structure, is convenient and quick to use, has a low production cost, is more practical, and is easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, further serve to explain the principles of the invention and to enable those skilled in the relevant art to make and use the invention.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the present invention from a first viewing angle;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the present invention from a second viewing angle;

[0023] Figure 3 for Figure 2 The enlarged structural diagram at A in the middle;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the mounting block and the retraction rod of the present invention;

[0025] Figure 5 for Figure 4 The enlarged structural diagram at B in the middle;

[0026] Figure 6 It is a schematic diagram of the three-dimensional unfolding structure of the mounting block and the retraction rod of the present invention;

[0027] Figure 7 is Figure 6 The enlarged structural schematic diagram at position C in

[0028] Figure 8 is the front view of the present invention;

[0029] Figure 9 is the three-dimensional unfolded structural schematic diagram of the spreading piece and the retractor rod of the present invention;

[0030] Figure 10 is Figure 9 The enlarged structural schematic diagram at position D in

[0031] Figure 11 is the unfolded structural schematic diagram of the spreading piece and the retractor rod of the present invention;

[0032] Figure 12 is Figure 11 The enlarged structural schematic diagram at position E in

[0033] Reference numerals:

[0034] 1. Handle; 2. Spreading rod; 3. Front hook; 4. Teeth; 5. Mounting block; 6. Retractor rod; 7. Side bladder; 8. Mounting groove; 9. First lightweight groove; 10. First cavity; 11. Limiting piece; 12. Buffer cavity; 13. Second cavity; 14. First weakening part; 15. Limiting block; 16. Concave part; 17. Second lightweight groove; 18. Second weakening part; 19. Clamping block; 20. Mounting piece; 21. First inserting block; 22. Second inserting block; 23. Spreading piece; 24. Third weakening part; 25. Retracting auxiliary piece; 26. Limiting clamping strip; 27. Guiding part; 28. Fourth weakening part; 29. Limiting groove; 30. Fifth weakening part.

[0035] As shown in the figure, in order to clearly implement the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic needs and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments. Detailed implementation manners

[0036] The following will describe in detail an adjustable semi-laminectomy surgical automatic retractor for spinal surgery provided by the present invention with reference to the accompanying drawings and specific embodiments. At the same time, it should be noted here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments. For some well-known technologies, those skilled in the art can also implement them in other alternative ways; and the accompanying drawings are only for describing the embodiments according to the body and are not intended to specifically limit the present invention.

[0037] It should be noted that in the specification, references to "one embodiment", "an embodiment", "exemplary embodiments", "some embodiments", etc. indicate that the described embodiments may include a particular feature, structure, or characteristic, but not every embodiment necessarily includes that particular feature, structure, or characteristic. Additionally, when a particular feature, structure, or characteristic is described in connection with an embodiment, it is within the knowledge of those skilled in the relevant art to implement such feature, structure, or characteristic in connection with other embodiments, whether or not explicitly described.

[0038] Generally, terms can be understood, at least in part, from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood as not necessarily intended to convey a set of exclusive factors, but rather, depending at least in part on the context, can alternatively allow for the existence of other factors that are not necessarily explicitly described.

[0039] It can be understood that the meanings of "on", "above", and "over" in the present invention should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but also can include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0040] Furthermore, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the figures. Spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the figures. The device may be otherwise oriented, and the spatial relative descriptors used herein may be interpreted correspondingly.

[0041] Such as Figures 1 to 12As shown in the figure, an embodiment of the present invention provides an adjustable automatic retractor for hemilaminectomy in spinal surgery, which includes a handle 1. One side of the handle 1 is fixedly connected with a spreading rod 2. A tooth 4 is fixedly connected to the spreading rod 2. A retracting rod 6 is installed at the bottom of the spreading rod 2; an installation and adjustment mechanism is provided, which is used to install the retracting rod 6 on the spreading rod 2 and for position adjustment of the retracting rod 6. The installation and adjustment mechanism is connected to the retracting rod 6; an auxiliary spreading mechanism is provided, which is used to assist the retracting rod 6 to open the surgical opening of the patient. The auxiliary spreading mechanism is connected to the installation and adjustment mechanism. The handle 1 is an existing mature technology, and its specific structural composition and working principle will not be elaborated here.

[0042] The length of the spreading rod 2 is 15 cm. The cross-section of the spreading rod 2 is square. The size of the retracting rod 6 is not limited. Different lengths of retracting rods 6 can be selected according to the specific on-site use situation during the operation. A first lightweight groove 9 is provided on the retracting rod 6 to reduce the mass of the retracting rod 6. One side of the spreading rod 2 away from the handle 1 is fixedly connected with a front hook 3, which can be stuck in the soft tissue between the spinous processes, so as to facilitate the spreading operation of the device. By using the installation and adjustment mechanism, the number of retracting rods 6 installed on the spreading rod 2 and the distance between each retracting rod 6 can be quickly adjusted. And after quickly selecting the corresponding size of the retracting rod 6 according to the specific on-site use situation, the retracting rod 6 can be quickly and stably installed on the spreading rod 2 for use, making the device have a wide range of applications, good practicability, convenient and fast to use. And by using the auxiliary spreading mechanism, the spreading operation of the main body of the device can be assisted, so that the device can better fully open the surgical opening, and then the spreading operation can be completed with as few surgical spreading instruments as possible. It is not only convenient to operate, but also saves manpower to a certain extent, and correspondingly increases the working efficiency of the surgical operation. The coordinated use of the structures further makes the use effect of the device better.

[0043] As Figures 2 to 7 and Figure 9 As shown in the figure, the installation and adjustment mechanism includes an installation block 5 installed on the retracting rod 6. A limiting piece 11 is installed on one side inner wall of the installation block 5. An installation groove 8 is provided on the installation block 5. A first cavity 10 adapted to the shape of the tooth 4 is provided on the installation block 5. A second cavity 13 is provided in the limiting piece 11. A limiting block 15 is installed on one side of the installation block 5. A clamping block 19 adapted to the shape of the limiting piece 11 is fixedly connected to one side of the limiting block 15. The shape of the installation groove 8 is adapted to the shape of the spreading rod 2. Both ends of the limiting piece 11 away from the installation groove 8 are fixed on the inner wall of the installation block 5, and the rest is not connected to the installation block 5.

[0044] By inserting the expansion rod 2 and the tooth 4 into the installation groove 8, the installation block 5 is sleeved on the expansion rod 2, and then the limiting block 15 is inserted into the first cavity 10, so that the limiting block 15 bends the side of the limiting piece 11 close to the installation groove 8, and the limiting piece 11 is deformed by the extrusion force. At this time, the limiting piece 11 does not contact the tooth 4, so as not to form an obstruction to the expansion rod 2 and the tooth 4, so that the installation block 5 can slide on the expansion rod 2, and different lengths of retraction rods 6 are selected according to the specific use conditions on site, and a corresponding number of retraction rods 6 are installed on the expansion rod 2, and the distance between the multiple retraction rods 6 is adjusted according to the required spacing. After completion, the limiting block 15 is taken out from the first cavity 10 to make the limiting piece 11 rebound, and one side of the limiting piece 11 after rebound fits with the outer wall of the tooth 4 as shown in FIG. Figure 5 As shown, a limit is formed on the mounting block 5, and then the limit block 15 is inserted into the second cavity 13, and the clamping block 19 is clamped into the middle groove of the limit plate 11. The clamping block 19 and the limit block 15 are used in coordination to further limit the limit plate 11, so that the mounting block 5 can be more stably installed on the spreader rod 2 for use. The coordinated use of the structures allows the device to be quickly installed and adjusted, so that the device can be better suitable for use in semi-push plate surgeries in different scenarios, and the structure is simple, easy to use and operate.

[0045] like Figures 5 to 8 As shown, the limiting plate 11 is M-shaped, so that the limiting plate 11 can fit well with the teeth 4 in a natural state, so that the limiting plate 11 can cooperate with the teeth 4 to quickly limit the mounting block 5, and the fifth weakening portion 30 is provided on both sides of the limiting plate 11, so that the limiting plate 11 can first be deformed from the fifth weakening portion 30 under the action of external force, and the first weakening portion 14 is provided in the middle of the limiting plate 11, so that the limiting plate 11 can preferentially be deformed from the first weakening portion 14 under the action of the outer wall, and a buffer cavity 12 is provided on the side of the limiting plate 11 close to the first weakening portion 14, which further enhances the deformation ability of the limiting plate 11 and reduces the weight of the limiting plate 11.

[0046] An activity cavity adapted to the shape of the limiting piece 11 is formed in the installation block 5, facilitating sufficient deformation and movement space for the limiting piece 11 under the action of an external force. Concave portions 16 are formed on both sides of the top of the limiting block 15, facilitating the clamping of the limiting block 15 with tools or pinching the limiting block 15 by hand, so as to install the limiting block 15 in the required groove according to specific usage conditions. A second lightweight groove 17 is formed in the limiting block 15, reducing the weight of the limiting block 15. Second weakening portions 18 are formed on both sides of the bottom of the limiting block 15. Through the formation of the second weakening portions 18, the second weakening portions 18 can deform first from the second weakening portions 18 under the action of extrusion force, enabling the limiting block 15 to be inserted into the first cavity 10 or the second cavity 13 more quickly. The coordinated use of the structures further improves the use effect of the device, and the structure is simple and convenient to use.

[0047] As Figures 8 to 12 shown, the auxiliary expansion mechanism includes a mounting piece 20 mounted on the mounting and adjusting mechanism. A first insertion block 21 adapted to the shape of the second cavity 13 is fixedly connected to the bottom of the mounting piece 20. A second insertion block 22 adapted to the shape of the buffer cavity 12 is fixedly connected to the bottom of the mounting piece 20. A spreading piece 23 is mounted between the two mounting pieces 20. A pulling auxiliary piece 25 is fixedly connected to the bottom of the spreading piece 23. After the installation block 5 and the pulling rod 6 are installed, the first insertion block 21 and the second insertion block 22 at the bottom of the mounting piece 20 are respectively inserted into the second cavity 13 and the buffer cavity 12 formed in two installation blocks 5 near the two outermost ends of the spreading rod 2. The limiting piece 11 is used to quickly limit and fix the mounting piece 20, and then the spreading piece 23 is quickly installed on the installation block 5 for use, so that the pulling auxiliary piece 25 is used to assist in expanding the surgical opening. Moreover, due to the arrangement of the spreading piece 23, it can also simply buffer the opening operation of the handle 1, preventing the surgical opening of the patient from being torn and suffering secondary injuries due to the too-fast opening operation of the handle 1. At the same time, the first insertion block 21 and the second insertion block 22 limit the limiting piece 11, enabling the installation block 5 to be stably installed on the spreading rod 2 for use. The structure is simple, and the coordinated use of the structures further improves the use effect of the device, thus making the device more practical.

[0048] The bottom edges of the first insertion block 21 and the second insertion block 22 are both arc-shaped, which is convenient for quickly inserting the first insertion block 21 into the second cavity 13 and also for quickly inserting the second insertion block 22 into the buffer cavity 12, so as to complete the installation of the installation piece 20. The spreading piece 23 is an arc-shaped structure protruding away from the center of the spreading rod 2. A third weakening part 24 is provided on one side of the spreading piece 23 close to the auxiliary spreading piece 25, so that the spreading piece 23 can deform first from the third weakening part 24 under the action of an external force. A side bladder 7 is installed on one side of the spreading rod 2, which can further protect both sides of the device and prevent the spreading rod 2 from tearing the surgical opening when cooperating with the retracting rod 6 to open the surgical opening. Two limiting strips 26 are fixedly connected to one side of the mounting block 5. A limiting groove 29 adapted to the shape of the limiting strip 26 is formed on the side bladder 7. The cooperation of the retracting rod 6 and the limiting groove 29 facilitates the quick and stable installation of the side bladder 7 on one side of the mounting block 5 for use. The cross-section of the limiting strip 26 is C-shaped. A guiding part 27 is provided on the side of the limiting strip 26 away from the mounting block 5. The guiding of the guiding part 27 can make the side bladder 7 be fixed on the limiting strip 26 faster. A fourth weakening part 28 is formed on one side of the limiting strip 26 close to the guiding part 27, so that the limiting strip 26 can deform first from the fourth weakening part 28 under the action of an external force, further facilitating the installation of the side bladder 7. Through the cooperation of the above structures, the use effect of the auxiliary spreading mechanism is further improved.

[0049] The working process of the technical solution provided by the present invention is as follows:

[0050] During use, first insert the spreading rod 2 and the tooth 4 into the installation groove 8, so that the mounting block 5 is sleeved on the spreading rod 2. Then insert the limiting block 15 into the first cavity 10, so that the limiting block 15 bends one side of the limiting piece 11 close to the installation groove 8. The limiting piece 11 deforms under the extrusion force. At this time, the limiting piece 11 does not contact the tooth 4, so as not to form an obstruction to the spreading rod 2 and the tooth 4, so that the mounting block 5 can slide on the spreading rod 2. Select retracting rods 6 of different lengths according to the specific on-site use conditions, and install the corresponding number of retracting rods 6 on the spreading rod 2, and adjust the distance between the multiple retracting rods 6 at the required spacing. After completion, take out the limiting block 15 from the first cavity 10, so that the limiting piece 11 rebounds. One side of the rebounded limiting piece 11 fits against the outer wall of the tooth 4 as Figure 5 shown, forming a limit on the mounting block 5. Then insert the limiting block 15 into the second cavity 13, and make the clamping block 19 be clamped at the middle groove of the limiting piece 11. The cooperation of the clamping block 19 and the limiting block 15 further limits the limiting piece 11, so that the mounting block 5 is more stably installed on the spreading rod 2 for use. The cooperation of the structures enables the device to be quickly installed and adjusted, so that the device can better be applied to the semi-push plate surgery in different scenarios.

[0051] After the installation block 5 and the retractor rod 6 are installed, the first insertion block 21 and the second insertion block 22 at the bottom of the installation piece 20 are respectively inserted into the second cavity 13 and the buffer cavity 12 opened on the two installation blocks 5 near the two outermost ends of the retractor rod 2. The limiting piece 11 is used to quickly limit and fix the installation piece 20, and then the retractor piece 23 is quickly installed on the installation block 5 for use, so that the auxiliary retractor piece 25 is used to assist in expanding the surgical opening, reducing the number of expansion instruments used. And when the handle 1 is opened, due to the arrangement of the retractor piece 23, a simple buffer can be carried out on the opening operation of the handle 1 to prevent the surgical opening of the patient from being torn and suffering secondary damage due to the too-fast opening operation of the handle 1. At the same time, the installation of the first insertion block 21 and the second insertion block 22 can also limit the limiting piece 11, so that the installation block 5 can be stably installed on the retractor rod 2 for use. And two limiting strips 26 are fixedly connected to one side of the installation block 5, and a limiting groove 29 adapted to the shape of the limiting strip 26 is opened on the side bladder 7. The cooperation of the retractor rod 6 and the limiting groove 29 facilitates the quick and stable installation of the side bladder 7 on one side of the installation block 5 for use. When performing the retraction operation, the side bladder 7 is installed on one side of the installation block 5 to further protect the surgical opening and prevent the opening from being torn.

[0052] By using the cooperation among the various structures in the device, the number of retractor rods 6 installed on the retractor rod 2 and the distance between each retractor rod 6 can be quickly adjusted, so that the retractor rods 6 can be quickly and stably installed on the retractor rod 2 for use, and the surgical opening can be better fully opened. Furthermore, the retraction operation can be completed with as few surgical retraction instruments as possible, effectively increasing the convenience of using the device. The structure of the device is simple and easy to use.

[0053] The present invention covers any substitutions, modifications, equivalent methods and solutions made within the essence and scope of the present invention. In order to enable the public to have a thorough understanding of the present invention, specific details are described in detail in the preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without these detailed descriptions. In addition, in order to avoid unnecessary confusion to the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0054] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. An adjustable automatic retractor for semi-laminectomy in spinal surgery, characterized in that: It comprises a handle, one side of the handle is fixedly connected with a spreading rod, a side of the spreading rod away from the handle is fixedly connected with a front hook, the spreading rod is fixedly connected with teeth, a retracting rod is installed at the bottom of the spreading rod, and a first lightweight groove is opened on the retracting rod; An installation adjustment mechanism, the installation adjustment mechanism is used to install the distraction rod on the spreading rod and to adjust the position of the distraction rod, the installation adjustment mechanism is connected to the distraction rod; The auxiliary expansion mechanism is used to assist the retractor rod in opening the surgical opening of the patient, and the auxiliary expansion mechanism is connected to the installation and adjustment mechanism.

2. The adjustable automatic retractor for semi-laminectomy for spinal surgery according to claim 1, characterized in that: The installation and adjustment mechanism includes a mounting block installed on the retraction rod, a limiting plate is installed on the inner wall of one side of the mounting block, a mounting groove is provided on the mounting block, a first cavity adapted to the shape of the teeth is provided on the mounting block, a second cavity is provided in the limiting plate, a limiting block is installed on one side of the mounting block, and a clamping block adapted to the shape of the limiting plate is fixedly connected to one side of the limiting block.

3. The adjustable automatic retractor for semi-laminectomy in spinal surgery according to claim 2, characterized in that: The limiting piece is M-shaped, a fifth weakened portion is provided on both sides of the limiting piece, and a first weakened portion is provided in the middle of the limiting piece.

4. The adjustable automatic retractor for semi-laminectomy for spinal surgery according to claim 3, characterized in that: A buffer cavity is formed on one side of the limiting piece close to the first weakened portion, and an active cavity matching the shape of the limiting piece is formed in the mounting block.

5. The adjustable automatic retractor for semi-laminectomy for spinal surgery according to claim 2, characterized in that: Both sides of the top of the limit block are provided with recessed parts, a second lightweight groove is provided on the limit block, and both sides of the bottom of the limit block are provided with second weakened parts.

6. The adjustable automatic retractor for semi-laminectomy in spinal surgery according to claim 4, characterized in that: The auxiliary expansion mechanism includes a mounting plate installed on the mounting and adjusting mechanism, the bottom of the mounting plate is fixedly connected with a first plug block adapted to the shape of the second cavity, the bottom of the mounting plate is fixedly connected with a second plug block adapted to the shape of the buffer cavity, a expansion plate is installed between the two mounting plates, and the bottom of the expansion plate is fixedly connected with a retraction auxiliary plate.

7. The adjustable automatic retractor for semi-laminectomy for spinal surgery according to claim 6, characterized in that: The bottom edges of the first plug-in block and the second plug-in block are both arc-shaped.

8. The adjustable automatic retractor for semi-laminectomy in spinal surgery according to claim 6, characterized in that: The expansion piece is an arc-shaped structure protruding away from the center of the expansion rod, and a third weakened portion is provided on a side of the expansion piece close to the auxiliary retraction piece.

9. The adjustable automatic retractor for semi-laminectomy in spinal surgery according to claim 6, characterized in that: A side bag is installed on one side of the expansion rod, a limiting clamping strip is fixedly connected to one side of the mounting block, and a limiting groove matching the shape of the limiting clamping strip is opened on the side bag.

10. The adjustable automatic retractor for semi-laminectomy in spinal surgery according to claim 9, characterized in that: The cross section of the limiting clamping strip is C-shaped, a guide portion is provided on a side of the limiting clamping strip away from the mounting block, and a fourth weakened portion is provided on a side of the limiting clamping strip close to the guide portion.

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