Instrument for retractor for lumbar surgery

Abstract

The invention relates to the technical field of lumbar surgery instruments.The instrument comprises two pulling legs with the middle ends rotationally connected with each other, two switching legs and two retractor assemblies, each switching leg comprises a switching sleeve, the side wall of the upper end of each switching sleeve is fixedly connected to the end of the corresponding pulling leg, and the side wall of the lower end of each switching sleeve is fixedly connected to the end of the corresponding pulling leg; a stepped hole is formed in the lower end; the upper ends of the transfer rods coaxially abut against the lower ends of the corresponding transfer sleeves, and the upper ends of the drag hook assemblies are fixedly connected to the lower ends of the corresponding transfer rods; the upper end of the adapter shaft extends into the stepped hole, the lower end of the adapter shaft is fixedly connected to the adapter rod, and the adapter shaft is rotationally and slidably connected to the adapter sleeve; the spring is located in the stepped hole and arranged on the adapter shaft in a sleeving mode, the lower end of the spring abuts against a hole shoulder of the stepped hole, and the upper end of the spring abuts against the end of the adapter shaft. The technical problems that in the prior art, a drag hook can only conduct the traction action and cannot achieve the distraction action, and the function is relatively single can be solved.

Description

Technical Field

[0001] This invention relates to the field of lumbar spine surgical instruments, specifically to an instrument for lumbar spine surgical retractors. Background Technology

[0002] In surgeries such as posterior lumbar laminectomy, interbody fusion, and decompression fixation, the surgeon will have an assistant use a nerve retractor to push the nerve root medially to protect the dural sac and the nerve root, in order to obtain a surgical field of vision.

[0003] In the prior art, the assistant may use a right-angle lumbar spinal nerve retractor protection device disclosed in Chinese Patent No. CN220988834U for traction assistance, which pulls the incision open through accessories. Alternatively, the assistant may use a posterior lumbar spine surgery spreader disclosed in Chinese Patent No. CN218979037U, which opens the incision through two opposing spreader handles.

[0004] Therefore, retractors can only pull, and spreaders can only spread; their functions are limited. For a single lumbar spine surgery, multiple retractors and multiple spreaders are needed to assist in the operation in order to complete the surgery. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide an instrument for lumbar spine surgery retractors, so as to improve the technical problem that the retractors in the prior art can only perform traction actions and cannot perform opening actions, and have relatively limited functions.

[0006] This invention is achieved through the following technical solution:

[0007] An instrument for lumbar spine surgery retractors includes two retractor legs rotatably connected at their middle ends, two adapter legs whose upper sidewalls are respectively fixedly connected to the ends of the two retractor legs, and two retractor assemblies whose upper ends are respectively fixedly connected to the lower ends of the two adapter legs. Each of the two adapter legs includes:

[0008] The adapter sleeve has its upper sidewall fixedly connected to the end of the corresponding pull leg, and its lower end has a stepped hole.

[0009] The upper end of the adapter rod is coaxially pressed against the lower end of the corresponding adapter sleeve, and the upper end of the hook assembly is fixedly connected to the lower end of the corresponding adapter rod.

[0010] The adapter shaft has its upper end inserted into the stepped hole and its lower end fixedly connected to the adapter rod. The adapter shaft is rotatable and slidably connected to the adapter sleeve.

[0011] A spring, located within the stepped hole and fitted onto the adapter shaft, has its lower end abutting against the shoulder of the stepped hole and its upper end abutting against the end of the adapter shaft.

[0012] Furthermore, the lower side of the adapter sleeve is provided with a plurality of first tooth grooves, each of the first tooth grooves being circumferentially spaced around the adapter shaft as the central axis, and the groove wall of each of the first tooth grooves along the circumferential tangent direction is a first inclined surface structure. The upper side of the adapter rod is circumferentially fixedly connected with a plurality of first locking teeth, each of the first locking teeth being adapted to and locked into each of the first tooth grooves.

[0013] Furthermore, the stepped hole vertically penetrates the upper end of the adapter sleeve, and the upper end of the adapter sleeve is threaded with a cover plate. The upper end of the adapter shaft is threaded with a limit nut, and the upper end of the spring abuts against the limit nut.

[0014] Furthermore, a washer is slidably connected to the upper end of the adapter shaft, and the spring is pressed against the limiting nut through the washer.

[0015] Furthermore, it also includes a hinge, which includes two fixed plates spaced apart and fixedly connected to the middle of one of the pull legs, a central shaft rotatably connected to the two fixed plates at both ends, a fixed sleeve fixedly connected to the middle of the other pull leg and opening towards the central shaft, and an elastic clip fixedly connected to the opening of the fixed sleeve. The elastic clip includes a clamping opening for the central shaft to enter and exit, and arc-shaped guide plates are fixedly connected to both sides of the clamping opening. The two arc-shaped guide plates extend obliquely in opposite directions.

[0016] Furthermore, one of the fixed plates is provided with a plurality of second toothed grooves, each of the second toothed grooves being circumferentially spaced around the central shaft, and the groove wall of each of the second toothed grooves along the circumferential tangent direction is a second inclined surface structure. Both of the arc-shaped guide plates are fixedly connected with elastic cantilever arms, and the ends of the two elastic cantilever arms are fixedly connected with second locking teeth facing one of the fixed plates. Both of the second locking teeth are adapted to and locked into the corresponding second toothed grooves.

[0017] Furthermore, the groove walls of each of the second tooth grooves near the central shaft are all inclined surfaces and form guide surfaces.

[0018] Furthermore, the central shaft includes a bolt and a nut threaded to the bolt shank. The bolt passes through both of the fixing plates and is secured within the elastic clamp.

[0019] Furthermore, each of the two hook assemblies includes an arc-shaped plate, two protective plates with one end fixedly connected to both ends of the arc-shaped plate, and two hook plates with one end fixedly connected to the lower end of the protective plate. The arc-shaped plate is fixedly connected to the corresponding adapter rod. The two protective plates form an angle structure of not less than 90° and not more than 150°. Both hook plates are located on the back side of the corresponding protective plate.

[0020] Furthermore, each of the two hook assemblies also includes two parallel inner plates. One end of each inner plate is fixedly connected to the end of the two protective plates away from the arc plate. One inner plate has an arc groove at its other end, and the other inner plate has an arc block that is adapted to and inserted into the opposite arc groove at its other end.

[0021] The beneficial effects of this invention are as follows:

[0022] This instrument for lumbar spine surgery retractors, by applying force to the adapter rod, causes the adapter rod to rotate relative to the adapter sleeve via the adapter shaft. When the two retractor assemblies open towards each other, the two pull legs can be operated to open the opposite sides of the two retractor assemblies. When both retractor assemblies open in the direction away from the operating end of the pull legs, the two pull legs can be operated to perform bidirectional traction on the back side of the two retractor assemblies, thereby realizing the multi-functionality of the retractor and improving the technical problem of existing retractors that can only perform traction actions and cannot perform opening actions, resulting in relatively single functions.

[0023] Other advantages, objectives, and features of the invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination, or may be learned from practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0024] Figure 1 This is a diagram showing the first usage state of the device of the present invention;

[0025] Figure 2 For the present invention Figure 1 First enlarged view of the area;

[0026] Figure 3 For the present invention Figure 2 A partial sectional view;

[0027] Figure 4 For the present invention Figure 3 A partial exploded view;

[0028] Figure 5 For the present invention Figure 1 Second enlarged view of the area;

[0029] Figure 6 This is an isometric view of the hinge component of the present invention;

[0030] Figure 7 This is a diagram showing the second usage state of the device of the present invention;

[0031] Figure 8This is a diagram showing the third usage state of the device of the present invention;

[0032] Figure 9 For the present invention Figure 8 A magnified view of a portion of the image;

[0033] Figure 10 For the present invention Figure 9 Enlarged view of part A;

[0034] Figure 11 For the present invention Figure 9 Another perspective on the structure diagram;

[0035] Figure 12 For the present invention Figure 11 Enlarged view of part B;

[0036] Figure 13 This is a diagram showing the fourth usage state of the device of the present invention;

[0037] Figure 14 For the present invention Figure 13 A magnified view of a portion of the image;

[0038] Figure 15 For the present invention Figure 14 Enlarged view of part C.

[0039] In the diagram: 1. Pull leg; 11. Handheld part; 12. Working part; 2. Adapter leg; 21. Adapter sleeve; 211. Stepped hole; 212. First tooth groove; 213. Cover plate; 22. Adapter rod; 221. First locking tooth; 23. Adapter shaft; 231. Limit nut; 232. Washer; 24. Spring; 3. Hook assembly; 31. Arc plate; 32. Protective plate; 33. Hook plate; 34. Inward plate; 341. Arc groove; 342. Arc block; 4. Hinge; 41. Fixing plate; 411. Second tooth groove; 412. Guide surface; 42. Central shaft; 421. Bolt; 422. Nut; 43. Fixing sleeve; 44. Elastic clamp; 441. Clamping port; 442. Arc guide plate; 45. Elastic cantilever; 451. Second locking tooth. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0041] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0042] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0043] In the above description of the present invention, it should be noted that the terms "one side," "the other side," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the product of the invention is conventionally placed during use. These terms are used only for the convenience of describing the present invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0044] Furthermore, terms such as "identical" do not imply that components must be absolutely identical; minor differences are permissible. The term "perpendicular" simply means that the positional relationship between components is more perpendicular than "parallel," not that the structure must be perfectly perpendicular; a slight tilt is acceptable.

[0045] Please see Figure 1-15 This invention provides a technical solution: an instrument for lumbar spine surgery retractors, comprising two retractor legs 1 rotatably connected at their middle ends, two adapter legs 2 whose upper side walls are respectively fixedly connected to the ends of the two retractor legs 1, and two retractor assemblies 3 whose upper ends are respectively fixedly connected to the lower ends of the two adapter legs 2. Each adapter leg 2 includes:

[0046] The adapter sleeve 21 has its upper side wall fixedly connected to the end of the corresponding pull leg 1, and its lower end has a stepped hole 211.

[0047] The upper end of the adapter rod 22 is coaxially pressed against the lower end of the corresponding adapter sleeve 21, and the upper end of the hook assembly 3 is fixedly connected to the lower end of the corresponding adapter rod 22.

[0048] The adapter shaft 23 has its upper end extending into the stepped hole 211 and its lower end fixedly connected to the adapter rod 22. The adapter shaft 23 is rotatable and slidably connected to the adapter sleeve 21.

[0049] Spring 24 is located in the stepped hole 211 and sleeved on the adapter shaft 23. Its lower end abuts against the shoulder of the stepped hole 211 and its upper end abuts against the end of the adapter shaft 23.

[0050] The adapter rod 22 is rotatably connected to the adapter sleeve 21 via the adapter shaft 23, and under the elastic support of the spring 24, the adapter rod 22 is pressed against the adapter sleeve 21. When it is necessary to pull or spread the hook assembly 3, a force can be applied to the adapter rod 22, causing the adapter rod 22 to rotate relative to the adapter sleeve 21 via the adapter shaft 23. When the two hook assemblies 3 are facing each other and open, it is the first use state (e.g., Figure 1 The two hook assemblies 3 can be opened by operating the two pull legs 1 to open the opposite sides of the two pull legs 1. When both hook assemblies 3 are open in the direction away from the operating end of the pull legs 1, it is the second use state (e.g. Figure 2 By operating the two pull legs 1, the two hook components 3 can perform bidirectional pulling operations on their back sides, thereby realizing the multi-functionality of the hooks and improving the technical problem that the hooks in the existing technology can only perform pulling actions and cannot perform opening actions, resulting in relatively single functions.

[0051] Of course, the hook assembly 3 can also be adjusted to other angles by rotating the adapter rod 22 relative to the adapter sleeve 21 to suit different usage needs.

[0052] In this embodiment: both pull legs 1 include a handle portion 11 and a working portion 12 fixedly connected to the handle portion 11. The handle portion 11 serves as the operating end and is fixedly connected to a finger ring. The working portion 12 serves as the working end, and the adapter leg 2 is fixedly connected to the end of the working portion 12. The ends of the handle portion 11 and the working portion 12 that are connected to each other constitute the middle of the pull leg 1, and the two pull legs 1 form an "X" shape.

[0053] In use, fingers are inserted into the finger rings, and the two handles 11 are held to operate, thereby opening and closing the two pull legs 1. As is a well-known technical means to those skilled in the art, the two finger rings can be located on the same horizontal plane, or they can be located one above the other.

[0054] In this embodiment: the lower side of the adapter sleeve 21 is provided with a plurality of first tooth grooves 212, each of the first tooth grooves 212 being circumferentially spaced around the adapter shaft 23 as the central axis, and the groove wall of each of the first tooth grooves 212 along the circumferential tangent direction is a first inclined surface structure. The upper side of the adapter rod 22 is circumferentially fixedly connected with a plurality of first locking teeth 221, each of the first locking teeth 221 being adapted to and locked into each of the first tooth grooves 212.

[0055] During operation, under the elastic support of the spring 24, the adapter rod 22 is pressed against the adapter sleeve 21, and each of the first locking teeth 221 is adapted and locked in the first tooth groove 212 to reduce the possibility of relative rotation between the adapter sleeve 21 and the adapter rod 22 during operation. At the same time, the groove wall of the first tooth groove 212 along the circumferential tangent direction is a first inclined surface structure. This first inclined surface structure can form a guiding effect, so that when the adapter rod 22 rotates relative to the adapter sleeve 21 through the adapter shaft 23, the spring 24 undergoes adaptive deformation, and the first locking teeth 221 can smoothly disengage from the first tooth groove 212 and enter the next adjacent first tooth groove 212.

[0056] The stepped hole 211 vertically penetrates the upper end of the adapter sleeve 21, and the upper end of the adapter sleeve 21 is threadedly connected to the cover plate 213. The upper end of the adapter shaft 23 is threadedly connected to the limit nut 231, and the upper end of the spring 24 abuts against the limit nut 231.

[0057] In order to press the spring 24 by rotating the limit nut 231, change the preload of the spring 24, and thus make the adapter rod 22 press against the adapter sleeve 21, so as to reduce the possibility of the hook assembly 3 rotating automatically during operation.

[0058] Furthermore, the cover plate 213 is connected by threads so that the spring 24 and the limiting nut 231 can be installed in the stepped hole 211 by unscrewing the cover plate 213.

[0059] The limiting nut 231 has a gap with the wall of the stepped hole 211 so that tools such as pliers can be inserted for operation.

[0060] A washer 232 is slidably connected to the upper end of the adapter shaft 23, and the spring 24 is pressed against the limit nut 231 through the washer 232.

[0061] The limit nut 231 is rotated when the adapter rod 22 is rotated relative to the adapter sleeve 21, so as to form a partition by the washer 232.

[0062] The sidewall of washer 232 abuts against the wall of stepped hole 211 to form secondary support for adapter shaft 23, ensuring the stable installation of adapter shaft 23; and the sidewall of washer 232 is provided with an operating hole to ensure that washer 232 can be pulled out from stepped hole 211 by using tools such as hooks. Of course, it is also possible to unscrew cover plate 213 and limit nut 231, invert adapter sleeve 21, and pour washer 232 out from stepped hole 211.

[0063] Please see Figures 8-12In this embodiment: the device for lumbar spine surgery retractor of the present invention further includes a hinge 4. The hinge 4 includes two spaced-apart fixing plates 41, each fixedly connected to the middle of one of the retractor legs 1, a central shaft 42 rotatably connected to the two fixing plates 41 at both ends, a fixing sleeve 43 fixedly connected to the middle of the other retractor leg 1 and opening toward the central shaft 42, and an elastic clip 44 fixedly connected to the opening of the fixing sleeve 43. The elastic clip 44 includes a clamping port 441 for the central shaft 42 to enter and exit, and arc-shaped guide plates 442 are fixedly connected to both sides of the clamping port 441. The two arc-shaped guide plates 442 extend obliquely in opposite directions.

[0064] The central shaft 42 is locked in the elastic clamp 44 so that the two pull legs 1 can be rotated and connected to each other through the hinge 4. When in use, force is applied to the operating end of the two pull legs 1, so that the two pull legs 1 can rotate about the central shaft 42 as the axis to open or close. During the opening process, the spreading operation is achieved.

[0065] During the pulling operation, opposite forces can be applied to the two pulling legs 1, causing the fixing plate 41 and the fixing sleeve 43 to separate, and the central shaft 42 to disengage from the clamping port 441 of the elastic clamp 44. At this time, the two pulling legs 1 are separated, and different parts can be pulled through the hook assembly 3 connected to the ends of the two pulling legs 1. This is the third usage state (e.g. Figure 8 ).

[0066] Based on the above embodiment, the hinge 4 is fixedly connected to the end of the pull leg 1 where the handle part 11 and the working part 12 are connected, and the two handle parts 11 cross after the hinge 4.

[0067] The closed end of the elastic clip 44 is fixedly connected to the fixing sleeve 43 by a straight plate.

[0068] In this embodiment: one of the fixing plates 41 has a plurality of second toothed grooves 411, each of the second toothed grooves 411 being circumferentially spaced around the central shaft 42, and the groove wall of each of the second toothed grooves 411 along the circumferential tangent direction is a second inclined surface structure. Both of the two arc-shaped guide plates 442 are fixedly connected with elastic cantilever 45, and the ends of the two elastic cantilever 45 are fixedly connected with second locking teeth 451 facing one of the fixing plates 41. Both second locking teeth 451 are adapted to and locked into the corresponding second toothed grooves 411.

[0069] During operation, each of the second locking teeth 451 is fitted and locked into each of the second tooth grooves 411. After the two legs 1 are opened to the required position, the second locking teeth 451 are locked into the second tooth grooves 411 to achieve a limiting position, thereby maintaining the opening angle of the two legs 1. This reduces the possibility that the assistant needs to use a large force to maintain the opening during the operation, especially during the opening operation. At the same time, the groove wall of the second tooth groove 411 along the circumferential tangential direction is a second inclined surface structure. This second inclined surface structure can form a guiding effect, so that when the fixed sleeve 43 rotates relative to the fixed plate 41, the elastic cantilever 45 undergoes adaptive deformation, and the second locking teeth 451 can smoothly disengage from the second tooth groove 411 and enter the next adjacent second tooth groove 411.

[0070] In this configuration, the two elastic cantilever arms 45 are positioned close to each other at their midpoints and far apart at their ends. Specifically, the two elastic cantilever arms 45 gradually move closer to each other from the end closest to the arc-shaped guide plate 442 to the midpoint, and gradually move away from each other from the midpoint to the other end where the second locking teeth 451 are fixed. This relatively shortens the distance between the other ends of the two elastic cantilever arms 45, allowing the two pull legs 1 to close. When both elastic cantilever arms 45 are inserted into the openings of the two fixed plates 41, the other ends of the two elastic cantilever arms 45 can clamp the elastic clamp 44 and undergo adaptive elastic deformation. After the central shaft 42 enters the elastic clamp 44, the two second locking teeth 451 slide from the surface of the fixed plate 41 into the two corresponding second tooth grooves 411. That is, the installation sliding path of the second tooth groove 411 is as follows: first, it enters the second tooth groove 411 at the opening end of the two fixing plates 41, then slides out of the second tooth groove 411 and slides on the plate surface of the fixing plate 41, and finally, when the central shaft 42 enters the elastic clamp 44, the second locking tooth 451 slides into the second tooth groove 411 at the closed end of the two fixing plates 41.

[0071] It should be noted that, for the above-mentioned scheme where the two finger rings can be located on the same horizontal plane, during disassembly, the two pull legs 1 can be rotated first to open the two pull legs 1 and move the two finger rings away from each other, and then the two pull legs 1 can be separated to avoid the finger rings colliding.

[0072] In each of the second tooth grooves 411, the groove wall near the central shaft 42 is an inclined surface, forming a guide surface 412.

[0073] When the fixing sleeve 43 is inserted into the space between the two fixing plates 41 to achieve the closing installation of the two pull legs 1, the second locking tooth 451 enters the second tooth groove 411, and as the second locking tooth 451 is pushed forward, the guide surface 412 can guide the second locking tooth 451; similarly, when the two pull legs 1 are separated, the guide surface 412 can also guide the second locking tooth 451, so that the second locking tooth 451 can smoothly disengage from the second tooth groove 411.

[0074] In this embodiment: the central shaft 42 includes a bolt 421 and a nut 422 threadedly connected to the shank of the bolt 421. The bolt 421 passes through both fixing plates 41 and is secured in the elastic clip 44.

[0075] Bolt 421 serves as the central axis, and under the snap-fit ​​of elastic clamp 44, it enables the stable rotation of the two pull legs 1. Nut 422 is threadedly connected to bolt 421 to facilitate assembly and disassembly.

[0076] Both fixing plates 41 have countersunk holes on their surfaces to allow bolts 421 and nuts 422 to enter, respectively. Furthermore, the head of bolt 421 has a hexagonal hole to allow for installation and removal of bolt 421 using a wrench.

[0077] Please see Figure 1 , Figure 2 In this embodiment: both hook assemblies 3 include an arc-shaped plate 31, two protective plates 32 with one end fixedly connected to both ends of the arc-shaped plate 31, and two hook plates 33 with one end fixedly connected to the lower end of the protective plate 32. The arc-shaped plate 31 is fixedly connected to the corresponding adapter rod 22. An included angle structure of not less than 90° and not more than 150° is formed between the two protective plates 32. The two hook plates 33 are located on the back side of the corresponding protective plate 32.

[0078] In use, the incision is pulled or opened by the combined action of the back of the two protective plates 32 and the two hook plates 33. The angle between the two protective plates 32 fits and opens the shape of the incision. The arc plate 31 and the two protective plates 32 make surface contact with the muscles of the incision to reduce the damage caused by the concentrated force on the muscles during the pulling or opening process. In the posterior lumbar spine surgery, the incision is opened to meet the surgeon's subsequent screw placement operation and to avoid interfering with the movement of surgical instruments during screw placement. At the same time, during the operation, the two hook plates 33 can wrap around the nerve root in two directions at the same time to form protection, improving the practicality of the retractor.

[0079] The angle formed between the two protective plates 32 can be 90°, 100°, 110° or 120°, etc.

[0080] Please see Figures 13-15 In this embodiment, each of the two hook assemblies 3 further includes two parallel inner plates 34. One end of each inner plate 34 is fixedly connected to the end of the two protective plates 32 away from the arc plate 31. The other end of one inner plate 34 is provided with an arc groove 341, and the other end of the other inner plate 34 is fixedly connected with an arc block 342 that is adapted to and inserted into the opposing arc groove 341.

[0081] When pulling or spreading actions are performed using the two hook assemblies 3, both inner plates 34 retract relative to the corresponding protective plates 32, reducing the possibility of injury to the wound due to concentrated force. Simultaneously, during use, the two pull legs 1 can be closed, and the arc-shaped block 342 enters the opposing arc-shaped groove 341. This is the fourth usage state (e.g., ...). Figure 13 The two hook assemblies 3 can be closed to perform unidirectional pulling operations simultaneously. The two hook plates 33 that are close to each other provide protection, and the arc block 342 enters into the opposite arc groove 341. The two inner plates 34 close, reducing the possibility of muscle injury due to gaps.

[0082] It should be noted that the postoperative disinfection and specific size setting of the retractor device of the present invention are existing technologies, and their application to surgical retractor devices can be achieved without creative effort, so they will not be elaborated here. For example, as a specific processing method, rounding the corners of the various parts of the surgical retractor device of the present invention is a conventional technical means in the field. For example, common retractor lengths are 95mm, 102mm, and 209mm.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention, and all such modifications or substitutions should be covered within the scope of the claims of the present invention.

Claims

1. An instrument for lumbar spine surgery retractors, comprising two retractor legs (1) rotatably connected at their middle ends, two adapter legs (2) whose upper sidewalls are respectively fixedly connected to the ends of the two retractor legs (1), and two retractor assemblies (3) whose upper ends are respectively fixedly connected to the lower ends of the two adapter legs (2), characterized in that: Both of the aforementioned adapter legs (2) include: The adapter sleeve (21) has its upper side wall fixedly connected to the end of the corresponding pull leg (1), and its lower end is provided with a stepped hole (211). The upper end of the adapter rod (22) is coaxially pressed against the lower end of the corresponding adapter sleeve (21), and the upper end of the hook assembly (3) is fixedly connected to the lower end of the corresponding adapter rod (22). The adapter shaft (23) has its upper end extending into the stepped hole (211) and its lower end fixedly connected to the adapter rod (22). The adapter shaft (23) is rotatable and slidably connected to the adapter sleeve (21). A spring (24) is located in the stepped hole (211) and sleeved on the adapter shaft (23). Its lower end abuts against the shoulder of the stepped hole (211), and its upper end abuts against the end of the adapter shaft (23).

2. The instrument for lumbar spine surgery retractors according to claim 1, characterized in that: The adapter sleeve (21) has a plurality of first toothed grooves (212) on its lower side. Each first toothed groove (212) is circumferentially spaced around the adapter shaft (23) as the central axis. The groove wall of each first toothed groove (212) along the circumferential tangent direction is a first inclined surface structure. The upper side of the adapter rod (22) is circumferentially fixedly connected with a plurality of first locking teeth (221). Each first locking tooth (221) is adapted to and locked into each first toothed groove (212).

3. The instrument for lumbar spine surgery retractors according to claim 1, characterized in that: The stepped hole (211) vertically penetrates the upper end of the adapter sleeve (21), and the upper end of the adapter sleeve (21) is threaded with a cover plate (213). The upper end of the adapter shaft (23) is threaded with a limit nut (231), and the upper end of the spring (24) abuts against the limit nut (231).

4. The instrument for lumbar spine surgery retractors according to claim 3, characterized in that: The upper end of the adapter shaft (23) is also slidably connected to a washer (232), and the spring (24) is pressed against the limiting nut (231) through the washer (232).

5. The instrument for lumbar spine surgery retractors according to claim 1, characterized in that: It also includes a hinge (4), which includes two fixed plates (41) spaced apart and fixedly connected to the middle of one of the pull legs (1), a central shaft (42) rotatably connected to the two fixed plates (41) at both ends, a fixed sleeve (43) fixedly connected to the middle of the other pull leg (1) and opening toward the central shaft (42), and an elastic clip (44) fixedly connected to the opening of the fixed sleeve (43). The elastic clip (44) includes a clamping port (441) for the central shaft (42) to enter and exit, and arc-shaped guide plates (442) are fixedly connected to both sides of the clamping port (441). The two arc-shaped guide plates (442) extend obliquely in opposite directions.

6. The instrument for lumbar spine surgery retractors according to claim 5, characterized in that: One of the fixed plates (41) has multiple second toothed grooves (411), each second toothed groove (411) is circumferentially spaced around the central shaft (42), and the groove wall of each second toothed groove (411) along the circumferential tangent direction is a second inclined surface structure. Both of the arc-shaped guide plates (442) are fixedly connected with elastic cantilever (45), and the ends of the two elastic cantilever (45) are fixedly connected with second locking teeth (451) facing one of the fixed plates (41). Both second locking teeth (451) are adapted to and locked into the corresponding second toothed groove (411).

7. The instrument for lumbar spine surgery retractors according to claim 6, characterized in that: Each of the second tooth grooves (411) has a groove wall close to the central shaft (42) that is inclined and forms a guide surface (412).

8. The instrument for lumbar spine surgery retractors according to claim 5, characterized in that: The central shaft (42) includes a bolt (421) and a nut (422) threaded to the shank of the bolt (421). The bolt (421) passes through both of the fixing plates (41) and is secured in the elastic clip (44).

9. The retractor for lumbar spine surgery according to any one of claims 1-8, characterized in that: Both hook assemblies (3) include an arc plate (31), two protective plates (32) with one end fixedly connected to both ends of the arc plate (31), and two hook plates (33) with one end fixedly connected to the lower end of the protective plate (32). The arc plate (31) is fixedly connected to the corresponding adapter rod (22). The two protective plates (32) form an angle structure of not less than 90° and not more than 150°. The two hook plates (33) are located on the back side of the corresponding protective plate (32).

10. The instrument for lumbar spine surgery retractors according to claim 9, characterized in that: Both hook assemblies (3) further include two parallel inner plates (34). One end of each inner plate (34) is fixedly connected to the end of each protective plate (32) away from the arc plate (31). One inner plate (34) has an arc groove (341) at the other end, and the other inner plate (34) has an arc block (342) that is adapted to and inserted into the opposite arc groove (341) at the other end.

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