Adjustable spinal nerve retractor

Abstract

The invention discloses an adjustable spinal nerve retractor which comprises a pulling tube, one end of the pulling tube is integrally connected with a retracting part, the middle of the pulling tube is sleeved with a sheathing canal in a penetrating mode, a driving box is fixedly installed in the middle of the top of the pulling tube, and the peripheral face of the sheathing canal is integrally connected with a sleeve located in the pulling tube. A tooth groove is formed in the top of the sleeve, a main rotating shaft is rotationally connected to the interior of the driving box, a transmission shaft is rotationally connected to one side of the driving box in a penetrating mode, an adjusting knob located outside the driving box is arranged at one end of the transmission shaft, and the other end of the transmission shaft is in transmission connection with the main rotating shaft. According to the adjustable spinal nerve retractor, the adjusting knob is rotated to enable the transmission shaft to rotate, then the rotating shaft is driven to rotate through the driving gear and the driven gear, the adjusting gear is made to rotate, then the tooth groove meshed with the adjusting gear drives the sleeve and the sheathing canal to slide, and the extension length of the sheathing canal at the tail end of the shifting tube is adjusted.

Description

Technical Field

[0001] The invention relates to the technical field of spinal surgery instruments, in particular to an adjustable spinal nerve retractor. Background Art

[0002] Spinal endoscopy is one of the most promising minimally invasive spinal surgery techniques today and is currently widely used in clinical practice. Based on the anatomical structure and physiological characteristics of the spine, this technology can provide targeted and precise treatment for common spinal nerve root compression diseases. During spinal surgery, in order to expand the operating field of the spinal endoscope and avoid damaging the spinal nerves, some will be assisted by a retractor for collaborative operation. The retractor can retract the spinal nerves and expand the operating range of the endoscope at the surgical site.

[0003] However, existing retractors are not convenient to use and are difficult to adjust in a narrow area. They place too high demands on the doctor's operation, limit the efficiency of the operation, and have certain risks. Summary of the invention

[0004] In view of the defects in the prior art, the present invention provides an adjustable spinal nerve retractor, including a pull tube, one end of the pull tube is integrally connected with a retracting part, a sheath tube is sleeved through the middle part of the pull tube, a driving box is fixedly installed in the middle part of the top of the pull tube, the outer circumferential surface of the sheath tube is integrally connected with a sleeve located inside the pull tube, a tooth groove is provided on the top of the sleeve, a main shaft is rotatably connected inside the drive box, a transmission shaft is rotatably connected through one side of the drive box, an adjustment knob located outside the drive box is provided at one end of the transmission shaft, the other end of the transmission shaft is transmission-connected to the main shaft, an adjustment gear is fixedly installed in the middle part of the main shaft, and the bottom of the adjustment gear penetrates the pull tube and meshes with the tooth groove.

[0005] Preferably, the other end of the transmission rod is fixedly mounted with a driving gear located inside the drive box, and the main rotating shaft is fixedly mounted with a driven gear located on one side of the adjusting gear, the driving gear is meshed with the driven gear, and the adjusting knob is turned to drive the rotating shaft to rotate through the driving gear and the driven gear, so that the adjusting gear rotates, and then the tooth groove meshing with the adjusting gear drives the sleeve and the sheath tube to slide, so as to adjust the protruding length of the sheath tube at the end of the tube pulling.

[0006] Preferably, the main shaft is fixedly installed with a friction cylinder located on the other side of the adjusting gear, and the top inside the drive box is rotatably connected with a locking clip, and the two locking clips are symmetrically arranged on both sides of the friction cylinder. A connecting groove is opened on the top of the locking clip, and the lower half of the locking clip is clamped to the outer peripheral surface of the friction cylinder.

[0007] Preferably, a guide slide rod passing through the top of the locking clamp is fixedly installed inside the driving box, and a sliding block is slidably connected to the guide slide rod, and a sliding cylinder is integrally connected to the front and rear sides of the sliding block, and the sliding cylinder is slidably connected to the inside of the connecting groove, and a clamping spring is sleeved on the middle part of the guide slide rod, and the two ends of the clamping spring are respectively in tight contact with the opposite surfaces of the two sliding blocks. After the adjustment is completed, the locking clamp and the friction cylinder are clamped under the action of the clamping spring to prevent the main shaft from rotating.

[0008] Preferably, the other side of the sliding block is integrally connected with a sleeve, the middle part of the sleeve is slidably connected to the guide sliding rod, and the two sides inside the driving box are horizontally slidably connected with sliding long rods, the sliding long rods are symmetrically arranged on both sides of the adjusting gear, and one end of the sliding long rod is integrally connected with a driving bevel block.

[0009] Preferably, a through groove is provided in the middle portion of the driving bevel block, and the driving bevel block is slidably connected with the guide slide rod through the through groove, and the inclined surface of the driving bevel block is in sliding contact with the other end of the sleeve, and the end of the sleeve away from the sliding block is provided with an inclined surface in sliding contact with the driving bevel block. By sliding contact between the sleeve and the inclined surface of the driving bevel block, the sleeve and the sliding block can be pushed to move along the guide slide rod when the driving bevel block is driven to move. When the adjusting gear is rotated, the sliding long rod slides and pulls the driving bevel block to move, thereby pushing the sleeve and the sliding block to move toward the middle of the guide slide rod, thereby driving the top of the locking clip to move closer to the middle, so that the locking clip is separated from the friction cylinder, so that the main shaft can rotate freely, which is convenient for adjustment.

[0010] Preferably, the two sides inside the driving box are rotatably connected with connecting long rods located on both sides of the main rotating shaft, the other end of the connecting long rod is movably connected to the top of the connecting long rod, the other end of the connecting long rod is movably connected to a sliding seat, and sliding grooves are provided at both ends of the connecting long rod. The other end of the sliding long rod and the sliding seat are respectively slidably connected to the sliding grooves at both ends of the connecting long rod, and pin shafts connected to the inside of the sliding grooves opened at both ends of the connecting long rod are respectively installed through the other end of the sliding long rod and the sliding seat, the diameter of the pin shaft is the same as the diameter of the sliding groove, and when the connecting long rod rotates, the sliding long rod can also maintain horizontal sliding when the sliding long rod is pulled by the sliding groove.

[0011] Preferably, the sliding seat is slidably connected to the rear side of the driving box, and two sliding seats are symmetrically arranged on both sides of the driving gear. The side of the sliding seat located outside the driving box is in close contact with the adjusting knob.

[0012] Preferably, the adjusting knob is connected to a roller for rotation toward one side of the driving box, the roller is in rolling contact with the sliding seat, a limiting groove is provided on the outer peripheral surface of the transmission shaft, the adjusting knob is slidably connected with the transmission shaft, and the middle part of the adjusting knob is integrally connected with an internal protrusion of the limiting groove. When the adjusting knob is turned, the adjusting knob is pressed to move the sliding seat, and then the connecting long rod pulls the sliding long rod to slide, and then the driving bevel block pushes the sliding block to move, and the roller arranged on one side of the adjusting knob makes it more convenient to turn the adjusting knob.

[0013] Preferably, the width of the through slot opened on the driving bevel block is the same as the diameter of the guide slide rod, and the width of the connecting slot is the same as the diameter of the sliding cylinder. The driving bevel block slides through the through slot, so that the sliding long rod remains horizontal when pulling the driving bevel block, and the through slot with the same diameter as the guide slide rod can enable the driving bevel block to remain stable during movement.

[0014] The beneficial effects of the present invention are embodied in:

[0015] 1. This adjustable spinal nerve retractor is provided with an adjusting gear. By turning the adjusting knob, the transmission shaft rotates, and then the driving gear and the driven gear drive the rotating shaft to rotate, so that the adjusting gear rotates, and then the tooth groove meshing with the adjusting gear drives the sleeve and the sheath to slide, so as to adjust the extension length of the sheath at the end of the tube retraction.

[0016] 2. This adjustable spinal nerve retractor is provided with a friction cylinder and a locking clamp. When the adjusting gear is rotated, the sliding long rod slides and pulls the driving inclined block to move, thereby pushing the sleeve and the sliding block to move toward the middle of the guide slide rod, thereby driving the top of the locking clamp to move toward the middle, so that the locking clamp is separated from the friction cylinder, so that the main shaft can rotate freely, which is convenient for adjustment. After the adjustment is completed, under the action of the clamping spring, the locking clamp and the friction cylinder are clamped to prevent the main shaft from rotating.

[0017] 3. This adjustable spinal nerve retractor is provided with a sliding seat. When the adjusting knob is turned, the adjusting knob is pressed to move the sliding seat, so that the connecting long rod pulls the sliding long rod to slide, and the driving bevel block pushes the sliding block to move. The roller arranged on one side of the adjusting knob makes it more convenient to turn the adjusting knob. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following is a brief introduction to the drawings required for the specific embodiments or the description of the prior art. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn according to the actual scale.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 It is a schematic diagram of the cross-section structure of the pipe pulling device of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the installation box of the present invention;

[0022] Figure 4 It is a structural schematic diagram of the main rotating shaft of the present invention;

[0023] Figure 5 It is a structural schematic diagram of the locking clip of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the sliding long rod of the present invention;

[0025] Figure 7 It is a structural schematic diagram of the transmission shaft of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the adjusting knob of the present invention.

[0027] In the attached figure: 1. pull tube; 2. retraction part; 3. sleeve; 4. sheath; 5. tooth groove; 6. drive box; 7. main shaft; 8. transmission shaft; 9. adjustment knob; 10. driving gear; 11. driven gear; 12. adjustment gear; 13. friction cylinder; 14. locking clamp; 15. connecting groove; 16. guide slide rod; 17. sliding block; 18. sliding cylinder; 19. clamping spring; 20. sleeve; 21. sliding long rod; 22. sliding seat; 23. connecting long rod; 24. driving inclined block; 25. limiting slide groove; 26. roller. DETAILED DESCRIPTION

[0028] The following embodiments of the technical solution of the present invention are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and are therefore only used as examples, and cannot be used to limit the protection scope of the present invention.

[0029] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which the present invention belongs.

[0030] like Figures 1 to 8As shown, an adjustable spinal nerve retractor comprises a pull tube 1, one end of which is integrally connected with a retracting portion 2, a sheath tube 4 is sleeved through the middle of the pull tube 1, a driving box 6 is fixedly installed in the middle of the top of the pull tube 1, the outer circumferential surface of the sheath tube 4 is integrally connected with a sleeve 3 located inside the pull tube, a tooth groove 5 is provided on the top of the sleeve 3, a main shaft 7 is rotatably connected inside the driving box 6, a transmission shaft 8 is rotatably connected through one side of the driving box 6, an adjusting knob 9 located outside the driving box 6 is provided at one end of the transmission shaft 8, the other end of the transmission shaft 8 is transmission-connected to the main shaft 7, an adjusting gear 12 is fixedly installed in the middle of the main shaft 7, and the bottom of the adjusting gear 12 penetrates the pull tube and meshes with the tooth groove 5.

[0031] As an embodiment of the present invention, the other end of the transmission rod is fixedly installed with a driving gear 10 located inside the drive box 6, and the main shaft 7 is fixedly installed with a driven gear 11 located on one side of the adjusting gear 12. The driving gear 10 is meshed with the driven gear 11. By setting the adjusting gear 12, the adjusting knob 9 is rotated to rotate the transmission shaft 8, and then the driving gear 10 and the driven gear 11 drive the shaft to rotate, so that the adjusting gear 12 rotates, and then the tooth groove 5 meshing with the adjusting gear 12 drives the sleeve 3 and the sheath tube 4 to slide, so as to adjust the protruding length of the sheath tube 4 at the end of the pull tube 1.

[0032] As an embodiment of the present invention, the main shaft 7 is fixedly installed with a friction cylinder 13 located on the other side of the adjusting gear 12, and the top inside the driving box 6 is rotatably connected with a locking clip 14. The two locking clips 14 are symmetrically arranged on both sides of the friction cylinder 13. A connecting groove 15 is opened on the top of the locking clip 14, and the lower half of the locking clip 14 is clamped with the outer peripheral surface of the friction cylinder 13.

[0033] As an embodiment of the present invention, a guide slide bar 16 is fixedly installed inside the drive box 6 and passes through the top of the locking clip 14. The guide slide bar 16 passes through a sliding block 17 that is slidably connected. The front and rear sides of the sliding block 17 are integrally connected with a sliding cylinder 18. The sliding cylinder 18 is slidably connected to the inside of the connecting groove 15. A clamping spring 19 is sleeved on the middle part of the guide slide bar 16. The two ends of the clamping spring 19 are respectively in tight contact with the opposite surfaces of the two sliding blocks 17. By setting the friction cylinder 13 and the locking clip 14, when the adjustment gear 12 is rotated, the sliding long rod 21 slides and pulls the driving inclined block 24 to move, thereby pushing the sleeve 20 and the sliding block 17 to move toward the middle part of the guide slide bar 16, thereby driving the top of the locking clip 14 to move closer to the middle part, so that the locking clip 14 is separated from the friction cylinder 13, thereby allowing the main shaft 7 to rotate freely, which is convenient for adjustment. After the adjustment is completed, under the action of the clamping spring 19, the locking clip 14 is clamped with the friction cylinder 13 to prevent the main shaft 7 from rotating.

[0034] As an embodiment of the present invention, a sleeve 20 is integrally connected to the other side of the sliding block 17, the middle part of the sleeve 20 is slidably connected to the guide slide rod 16, and a long sliding rod 21 is horizontally slidably connected to both sides of the driving box 6. The long sliding rod 21 is symmetrically arranged on both sides of the adjusting gear 12, and one end of the long sliding rod 21 is integrally connected to the driving bevel block 24.

[0035] As an embodiment of the present invention, a through groove is opened in the middle of the driving bevel block 24, and the driving bevel block 24 is slidably connected with the guide slide bar 16 through the through groove. The inclined surface of the driving bevel block 24 is in sliding contact with the other end of the sleeve 20, and the end of the sleeve 20 away from the sliding block 17 is provided with an inclined surface in sliding contact with the driving bevel block 24. By making the sleeve 2 and the inclined surface of the driving bevel block 24 slidably contact, the driving bevel block 24 is driven to move, which can push the sleeve 20 and the sliding block 17 to move along the guide slide bar 16.

[0036] As an embodiment of the present invention, the two sides inside the driving box 6 are rotatably connected with connecting long rods 23 located on both sides of the main rotating shaft 7, the other end of the connecting long rod 23 is movably connected to the top of the connecting long rod 23, and the other end of the connecting long rod 23 is movably connected to the sliding seat 22, and the two ends of the connecting long rod 23 are provided with sliding grooves, and the other end of the sliding long rod 21 and the sliding seat 22 are respectively slidably connected to the sliding grooves at both ends of the connecting long rod 23, and the other end of the sliding long rod 21 and the sliding seat 22 are respectively installed with pins connected to the inside of the sliding grooves opened at both ends of the connecting long rod 23, and the diameter of the pin is the same as the diameter of the sliding groove. When the connecting long rod 23 rotates, when the sliding long rod 21 is pulled by the sliding groove, the sliding long rod 21 can also maintain horizontal sliding.

[0037] As an embodiment of the present invention, the sliding seat 22 is slidably connected to the rear side of the driving box 6, and the two sliding seats 22 are symmetrically arranged on both sides of the driving gear 10. The sliding seat 22 is located on one side outside the driving box 6 and is in close contact with the adjusting knob 9. The sliding seat 22 is pushed to move by the adjusting knob 9, so that when the adjusting knob 9 is not rotated, the sliding seat 22 automatically resets, so that the locking clip 14 is clamped with the friction cylinder 13.

[0038] As an embodiment of the present invention, the adjusting knob 9 is connected to a roller 26 for rotation toward one side of the driving box 6, and the roller 26 is in tight rolling contact with the sliding seat 22. A limiting groove 25 is provided on the outer peripheral surface of the transmission shaft 8, and the adjusting knob 9 is slidably connected with the transmission shaft. The middle part of the adjusting knob 9 is integrally connected with an internal protrusion of the limiting groove 25. By setting the sliding seat 22, when the adjusting knob 9 is rotated, the adjusting knob 9 is pressed to move the sliding seat 22, and then the connecting long rod 23 pulls the sliding long rod 21 to slide, and then the driving bevel block 24 pushes the sliding block 17 to move, and the roller 26 arranged on one side of the adjusting knob 9 makes it more convenient to rotate the adjusting knob 9.

[0039] As an embodiment of the present invention, the width of the through slot opened in the driving bevel block 24 is the same as the diameter of the guide slide rod 16, the width of the connecting slot 15 is the same as the diameter of the sliding cylinder 18, and the driving bevel block 24 slides through the opened through slot, so that the sliding long rod 21 remains horizontal when pulling the driving bevel block 24, and the through slot with the same diameter as the guide slide rod 16 can enable the driving bevel block 24 to remain stable during movement.

[0040] It should be noted that when in use, when the adjusting knob 9 is turned, the adjusting knob 9 is pressed to move the sliding seat 22, so that the connecting long rod 23 pulls the sliding long rod 21 to slide, and the sliding long rod 21 slides and pulls the driving inclined block 24 to move, thereby pushing the sleeve 20 and the sliding block 17 to move toward the middle of the guide slide rod 16, thereby driving the top of the locking clip 14 to move toward the middle, so that the locking clip 14 is separated from the friction cylinder 13, so that the main shaft 7 can rotate freely, which is convenient for adjustment. Turn the adjusting knob 9, The transmission shaft 8 rotates, and then the rotating shaft is driven to rotate through the driving gear 10 and the driven gear 11, so that the adjusting gear 12 rotates, and then the tooth groove 5 meshing with the adjusting gear 12 drives the sleeve 3 and the sheath tube 4 to slide, so as to adjust the extension length of the sheath tube 4 at the end of the pull tube 1. After the adjustment is completed, under the action of the clamping spring 19, the locking clamp 14 and the friction cylinder 13 are clamped to prevent the main rotating shaft 7 from rotating, and the roller 26 arranged on one side of the adjusting knob 9 makes it more convenient to rotate the adjusting knob 9.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention, and they should all be included in the scope of the claims and specification of the present invention.

Claims

1. An adjustable spinal nerve retractor, comprising a retractor tube (1), characterized in that: One end of the pulling tube (1) is integrally connected with a retraction portion (2), a sheath tube (4) is sleeved through the middle of the pulling tube (1), a driving box (6) is fixedly installed in the middle of the top of the pulling tube (1), the outer peripheral surface of the sheath tube (4) is integrally connected with a sleeve (3) located inside the pulling tube, a tooth groove (5) is provided on the top of the sleeve (3), the inside of the driving box (6) is rotatably connected with a main shaft (7), one side of the driving box (6) is rotatably connected with a transmission shaft (8), one end of the transmission shaft (8) is provided with an adjustment knob (9) located outside the driving box (6), the other end of the transmission shaft (8) is connected to the main shaft (7), an adjustment gear (12) is fixedly installed in the middle of the main shaft (7), the bottom of the adjustment gear (12) passes through the pulling tube and meshes with the tooth groove (5).

2. The adjustable spinal nerve retractor according to claim 1, characterized in that: A driving gear (10) located inside the driving box (6) is fixedly mounted on the other end of the transmission rod, and a driven gear (11) located on one side of the adjusting gear (12) is fixedly mounted on the main rotating shaft (7), and the driving gear (10) is meshed with the driven gear (11).

3. The adjustable spinal nerve retractor according to claim 1, characterized in that: The main shaft (7) is fixedly mounted with a friction cylinder (13) located on the other side of the adjusting gear (12); the top of the driving box (6) is rotatably connected with a locking clamp (14); two locking clamps (14) are symmetrically arranged on both sides of the friction cylinder (13); a connecting groove (15) is provided on the top of the locking clamp (14); and the lower half of the locking clamp (14) is clamped with the outer peripheral surface of the friction cylinder (13).

4. The adjustable spinal nerve retractor according to claim 3, characterized in that: A guide slide bar (16) penetrating the top of the locking clamp (14) is fixedly installed inside the driving box (6); a sliding block (17) is slidably connected to the guide slide bar (16); a sliding cylinder (18) is integrally connected to the front and rear sides of the sliding block (17); the sliding cylinder (18) is slidably connected to the inside of the connecting groove (15); a clamping spring (19) is sleeved on the middle part of the guide slide bar (16); two ends of the clamping spring (19) are respectively in tight contact with the opposite surfaces of the two sliding blocks (17).

5. The adjustable spinal nerve retractor according to claim 4, characterized in that: The other side of the sliding block (17) is integrally connected with a sleeve (20), the middle part of the sleeve (20) is slidably connected to the guide sliding rod (16), and the two sides inside the driving box (6) are horizontally slidably connected with sliding long rods (21), the sliding long rods (21) are symmetrically arranged on both sides of the adjusting gear (12), and one end of the sliding long rod (21) is integrally connected with a driving inclined block (24).

6. The adjustable spinal nerve retractor according to claim 5, characterized in that: A through slot is provided in the middle of the driving inclined block (24), and the driving inclined block (24) is slidably connected to the guide slide bar (16) through the through slot. The inclined surface of the driving inclined block (24) is in sliding contact with the other end of the sleeve (20), and the end of the sleeve (20) away from the slide block (17) is provided with an inclined surface in sliding contact with the driving inclined block (24).

7. The adjustable spinal nerve retractor according to claim 6, characterized in that: The two sides of the driving box (6) are rotatably connected to connecting long rods (23) located on both sides of the main rotating shaft (7); the other end of the connecting long rod (23) is movably connected to the top of the connecting long rod (23); the other end of the connecting long rod (23) is movably connected to a sliding seat (22); sliding grooves are provided at both ends of the connecting long rod (23); the other end of the sliding long rod (21) and the sliding seat (22) are respectively slidably connected to the sliding grooves at both ends of the connecting long rod (23).

8. The adjustable spinal nerve retractor according to claim 7, characterized in that: The sliding seat (22) is slidably connected to the rear side of the driving box (6), and the two sliding seats (22) are symmetrically arranged on both sides of the driving gear (10). The side of the sliding seat (22) located outside the driving box (6) is in close contact with the adjusting knob (9).

9. The adjustable spinal nerve retractor according to claim 8, characterized in that: The adjusting knob (9) is rotatably connected to one side of the driving box (6), and the roller (26) is in tight rolling contact with the sliding seat (22). A limiting sliding groove (25) is provided on the outer peripheral surface of the transmission shaft (8), and the adjusting knob (9) is slidably connected to the transmission shaft. The middle part of the adjusting knob (9) is integrally connected with an internal protrusion of the limiting sliding groove (25).

10. The adjustable spinal nerve retractor according to claim 6, characterized in that: The width of the through slot formed in the driving inclined block (24) is the same as the diameter of the guide slide bar (16), and the width of the connecting slot (15) is the same as the diameter of the sliding cylinder (18).

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