Tissue spreader for spinal surgery

Abstract

The utility model relates to the field of tissue distraction devices for spinal surgeries, and discloses a tissue distraction device for spinal surgeries, which comprises a quick release mechanism, the quick release mechanism is used for switching distraction tools in the use process, the quick release mechanism comprises a left force arm and a right force arm, and an opening and closing assembly is arranged at the joint part of the left force arm and the right force arm. Second convex grooves are formed in the upper portions and the lower portions of the rear sides of the left force arm and the right force arm correspondingly, second convex blocks are arranged in the second convex grooves in a sliding mode correspondingly, the second convex blocks are fixedly connected to the upper sides and the lower sides of the interiors of the first U-shaped plates correspondingly, and U-shaped grooves are formed in the sides, away from each other, of the rear portions of the left force arm and the right force arm correspondingly. According to the utility model, the U-shaped plate I slides to compress the spring II, so that the U-shaped plate II is separated from the ball, and the U-shaped plate I is loosened after a new supporting head is replaced, so that quick replacement is realized. The spring clamping piece provides elastic pulling force to keep clamping of the pawl and the rack, and the problems of angle fixation and stability are solved.

Description

Technical Field

[0001] The utility model relates to the field of tissue spreaders for spinal surgery, in particular to a tissue spreader for spinal surgery. Background Art

[0002] During spinal surgery, tissue spreaders are used to precisely separate and spread the tissue surrounding the spine so that the surgeon can clearly access the surgical field. These devices typically consist of a main frame and multiple adjustable spreader arms that provide stable support during surgery. By precisely adjusting the angle and width of the spreader arms, the surgeon can control the degree of tissue separation, thereby reducing damage to surrounding structures and improving the surgical field of view and precision.

[0003] Tissue spreaders are used in spinal surgery, and their associated equipment includes various surgical forceps and clamps. These instruments are typically made of sturdy metal and feature multiple adjustment mechanisms. They consist of a main frame connected to multiple adjustable spreader arms via a screw or lever system. The working principle is to steadily separate the surrounding tissue by adjusting the angle and distance of these spreader arms, providing a clear surgical field of view and ample operating space.

[0004] The expansion head and lever arm of some tissue expanders are fixed, which requires the preparation of multiple expanders during surgery, thereby increasing the workload of preoperative preparation, increasing the cost of equipment purchase, increasing the investment in medical resources, and requiring more manpower and material resources in daily management; and the tissue expander cannot be fixed and adjusted to the expansion angle during use, and may shift due to insufficient stability, thereby increasing the risk of surgery, thereby increasing the patient's pain and causing uncertainty in postoperative recovery. Therefore, a tissue expander for spinal surgery is proposed to solve the above problems. Utility Model Content

[0005] In order to overcome the above shortcomings, the present invention provides a tissue spreader for spinal surgery, aiming to improve the problem in the prior art that the spreading head of some tissue spreaders is fixed to the lever arm and the angle cannot be fixed, resulting in poor stability.

[0006] In order to achieve the above-mentioned purpose, the present invention adopts the following technical solution: a tissue spreader for spinal surgery, comprising:

[0007] The quick-release mechanism is used to switch the spreading tool during use, and the quick-release mechanism includes a left lever arm and a right lever arm, and the joints of the left lever arm and the right lever arm are provided with an opening and closing assembly, and the upper and lower parts of the rear sides of the left lever arm and the right lever arm are provided with a convex groove two, and the interior of the convex groove two is slidably provided with a convex block two, and the convex block two are fixedly connected to the upper and lower sides of the interior of the U-shaped plate one, and the left lever arm and the right lever arm are provided with a U-shaped groove on the side away from the rear ends, and the inner front side of the U-shaped groove is equidistantly fixed with one end of a plurality of springs two, and the other end of the springs two is fixedly connected to the rear side of the U-shaped plate two, and the outside of the U-shaped plate two is fixedly connected to the inner rear side of the U-shaped plate one, and the rear of the left lever arm and the right lever arm are provided with a spreading head assembly;

[0008] An adjustment mechanism for adjusting a distraction angle of tissue distraction for spinal surgery;

[0009] As a further description of the above technical solution: the support head assembly, the support head assembly includes a support head, the front middle side of the support head is fixedly connected to a convex head, the front of the convex head is evenly provided with a plurality of circular grooves, the rear side of the inner part of the U-shaped groove is evenly provided with a plurality of cylindrical grooves, the interior of the cylindrical groove is provided with balls, the circular grooves are in one-to-one correspondence with the balls and are engaged with them, the rear middle sides of the left and right arm are provided with square grooves, and the convex heads are engaged with the square grooves;

[0010] As a further description of the above technical solution: the adjusting mechanism comprises a convex groove 1, the convex groove 1 is provided on the right front side of the right lever arm, one end of a spring 1 is fixedly connected to the inner front side of the convex groove 1, the other end of the spring 1 is fixedly connected to the front middle side of the convex block 1, the rear right side of the convex block 1 is rotatably connected to the front right side of the pawl through a rotating shaft, the rear left side of the convex block 1 is fixedly connected to the front left side of the pawl through a spring clip, the right middle side of the convex block 1 is fixedly connected to a push plate, a square hole is provided on the right front side of the right lever arm, and the right front side of the left lever arm is fixedly connected to a rack;

[0011] As a further description of the above technical solution: the rack passes through the square hole, and the pawl passes through the convex groove and engages with the corresponding tooth of the rack;

[0012] As a further description of the above technical solution: the inner material of the support head is stainless steel, and the outer surface of the stainless steel is provided with a right titanium alloy coating;

[0013] As a further description of the above technical solution: an opening and closing assembly, the opening and closing assembly includes a screw, the opening and closing parts of the left lever arm and the right lever arm are fixedly connected to the connecting block 2 and the connecting block 1 respectively, and the screw passes through the connecting block 2 and is threadedly connected to the connecting block 1;

[0014] As a further description of the above technical solution: the right front side of the left lever arm and the left front side of the right lever arm are respectively fixedly connected with one end of the left spring leaf and one end of the right spring leaf, and the other end of the right spring leaf passes through the rear side of the left spring leaf;

[0015] As a further description of the above technical solution: the two U-shaped plates are in contact with the outer side of the ball.

[0016] The utility model has the following beneficial effects:

[0017] The U-shaped plate can be used to push the user to move the U-shaped plate to the side so that the user can ...

[0018] 2. In the present invention, when the angle of the supporting head needs to be adjusted, the left and right lever arms are squeezed inward, and the spring clip provides an elastic pulling force for the pawl, so that the pawl can maintain the engaged state with the rack under normal circumstances, ensuring stability during long-term use. When the supporting head needs to be released, the push plate is slid, and the push plate drives the convex block 1 to slide inside the convex groove 1, so that the pawl disengages from the rack, and the rack rotates around the rotating shaft and separates from the rack. The push plate is released, and the spring 1 will squeeze the convex block 1, which can help the relevant components return to the initial position or perform elastic adjustment within a certain range, so as to solve the problem that the supporting angle cannot be fixedly adjusted during use and displacement due to insufficient stability may occur. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is the overall structure diagram of a tissue spreader for spinal surgery proposed by the utility model;

[0020] Figure 2 This is an expanded view of a tissue spreader for spinal surgery proposed by the present invention;

[0021] Figure 3 This is a partial cross-sectional view of a tissue spreader for spinal surgery proposed by the present invention;

[0022] Figure 4 This is a rear cross-sectional view of a tissue spreader for spinal surgery proposed by the present invention;

[0023] Figure 5 for Figure 3 Enlarged view of point A in the middle;

[0024] Figure 6 for Figure 3 Enlarged view of point B in the middle.

[0025] Legend:

[0026] 1. Left lever arm; 2. Right lever arm; 3. Left spring leaf; 4. Right spring leaf; 5. Rack; 6. Screw; 7. Spreader head; 8. U-shaped plate 1; 9. Connecting block 1; 10. Connecting block 2; 11. Convex head; 12. Circular groove; 13. Square groove; 14. U-shaped groove; 15. Square hole; 16. Convex groove 1; 17. Convex block 1; 18. Push plate; 19. Rotating shaft; 20. Spring clip; 21. Spring 1; 22. Ratchet; 23. Convex groove 2; 24. Convex block 2; 25. Spring 2; 26. U-shaped plate 2; 27. Cylindrical groove; 28. Ball. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0028] Reference Figure 1 、 Figure 3 and Figure 6 The present invention provides an embodiment of a tissue spreader for spinal surgery, comprising:

[0029] The quick-release mechanism is used to switch the expansion tool during use. The quick-release mechanism includes a left lever 1 and a right lever 2. The left lever 1 and the right lever 2 are the main structural components of the quick-release mechanism, and they play an important role in transmitting force and supporting the expansion action. The left lever 1 and the right lever 2 can be made of high-strength aluminum alloy. This material has the characteristics of light weight and high strength. While meeting the mechanical performance requirements, it can reduce the weight of the entire mechanism and facilitate movement and adjustment during surgical operations. The joints of the left lever 1 and the right lever 2 are provided with an opening and closing component. The opening and closing component includes a screw 6. The screw 6 can be made of stainless steel. Stainless steel has good corrosion resistance and can maintain stable performance in complex surgical environments such as those filled with body fluids, preventing rust from affecting its mechanical properties, and its high strength can withstand the force generated during the opening and closing operation. The opening and closing parts of the left lever 1 and the right lever 2 are fixedly connected with a connecting block 2 10, a connecting block 1 9, a connecting block 2 10 and a connecting block respectively. 1-9 is a component used to connect the left lever 1, the right lever 2 and the screw 6, which closely connects the left lever 1, the right lever 2 and the screw 6 to ensure effective transmission of force and provide a stable connection point for opening and closing operations. The screw 6 passes through the connecting block 2 10 and is threadedly connected to the connecting block 1-9. The right front side of the left lever 1 and the left front side of the right lever 2 are fixedly connected with one end of the left spring sheet 3 and the right spring sheet 4 respectively. The other end of the right spring sheet 4 passes through the rear side of the left spring sheet 3. The left spring sheet 3 and the right spring sheet 4 play the role of auxiliary support and reset in the opening and closing assembly. During the opening and closing operation, they can provide a certain elastic force to ensure the smoothness of the opening and closing action and help the lever return to its initial state when it needs to be reset.The left spring piece 3 and the right spring piece 4 can be made of a high elastic alloy material, such as nickel-titanium alloy. This alloy has superelasticity and shape memory properties, can maintain stable elastic properties within a large deformation range, and is not prone to fatigue fracture, ensuring that it can still work normally after multiple opening and closing operations. The upper and lower parts of the rear sides of the left lever 1 and the right lever 2 are both provided with convex grooves 23, and convex blocks 24 are slid inside the convex grooves 23. The convex grooves 23 provide specific space and guidance for the installation and sliding of subsequent components. The convex grooves 23 can be directly processed on the aluminum alloy material of the lever. The machinability of the aluminum alloy makes it possible to manufacture a convex groove 23 structure with higher precision. The convex blocks 24 are slid inside the convex grooves 23. The convex grooves 23 provide specific space and guidance for the installation and sliding of subsequent components. The convex grooves 23 can be directly processed on the aluminum alloy material of the lever. The machinability of the aluminum alloy makes it possible to manufacture a convex groove 23 structure with higher precision. The two 24 are fixedly connected to the upper and lower sides of the interior of the U-shaped plate 8. The U-shaped plate 8 can be made of medical-grade stainless steel. The high strength and corrosion resistance of stainless steel can ensure its stability in the surgical environment and provide reliable support for other components. A U-shaped groove 14 is provided on the side away from the rear of the left lever arm 1 and the right lever arm 2. One end of a plurality of springs 25 are fixedly connected to the front side of the interior of the U-shaped groove 14 at equal distances. The other end of the spring 25 is fixedly connected to the rear side of the U-shaped plate 26. The spring 25 has a reset function. The outside of the U-shaped plate 26 is fixedly connected to the rear side of the U-shaped plate 8. The rear of the left lever arm 1 and the right lever arm 2 is provided with a support head assembly.

[0030] The head assembly includes a head 7, which directly acts on spinal tissue to distract it. Its shape, material, and structure directly influence the distraction effect and its impact on the tissue. The internal material of the head 7 is stainless steel, which offers excellent strength and corrosion resistance. A convex head 11 is fixedly connected to the front and middle sides of the head 7. Its unique shape mates with the corresponding component to ensure a secure connection and effective force transmission. The convex head 11 can be made of the same stainless steel material as the supporting head 7 to ensure the strength and stability of the overall structure. A number of circular grooves 12 are evenly spaced on the front of the convex head 11, and a number of cylindrical grooves 27 are evenly spaced on the inner rear side of the U-shaped groove 14. Balls 28 are provided inside the cylindrical grooves 27. The circular grooves 12 correspond to the ball 28 one by one and are engaged with each other. A square groove 13 is provided on the rear middle side of the left lever arm 1 and the right lever arm 2. The square groove 13 provides a matching accommodation space for the convex head 11, and cooperates with the convex head 11 to further ensure the stability of the connection between the supporting head 7 and the lever arm, so that the supporting head 7 can be accurately positioned and transmit force during the expansion operation. The convex head 11 is engaged with the square groove 13. The inner material of the supporting head 7 is stainless steel, and the outside of the stainless steel is provided with a right titanium alloy coating.

[0031] Reference Figure 1-Figure 5, adjustment mechanism, the adjustment mechanism is used to adjust the expansion angle of the tissue expansion for spinal surgery, the adjustment mechanism includes a convex groove 16, the convex groove 16 is opened on the right front side of the right lever arm 2, the convex groove 16 provides a specific space and guide for the installation and movement of subsequent components, the inner front side of the convex groove 16 is fixedly connected with one end of a spring 21, and the other end of the spring 21 is fixedly connected to the front middle side of the convex block 17. The spring 21 plays the role of elastic reset and auxiliary adjustment in the adjustment mechanism, one end is fixed to the inner front side of the convex groove 16, providing elastic force support for the convex block 17 and subsequent components, and during the expansion angle adjustment process, it can help the relevant components return to the initial position or perform elastic adjustment within a certain range. The rear right side of the convex block 17 is rotatably connected to the front right side of the pawl 22 through the rotating shaft 19, and the rotating shaft 19 and the pawl 22 can adopt different The material is stainless steel. The corrosion resistance and strength of stainless steel can ensure stability during long-term use. The left side of the rear of the convex block 17 is fixedly connected to the left side of the front of the pawl 22 through a spring clip 20. The spring clip 20 provides an elastic pulling force for the pawl 22, so that the pawl 22 can maintain the engaged state with the rack 5 under normal circumstances. Only when it is subjected to a specific external force will it rotate around the rotating shaft 19 and separate from the rack 5, ensuring the stability of the opening angle after adjustment. The push plate 18 is fixedly connected to the middle side of the right part of the convex block 17, and a square hole 15 is provided on the right front side of the right lever arm 2. The rack 5 is fixedly connected to the right front side of the left lever arm 1. The engaging relationship between the rack 5 and the pawl 22 can convert the movement of the left lever arm 1 into the relative movement of the right lever arm 2, thereby realizing the adjustment of the opening angle, and the tooth structure of the rack 5 can ensure the accuracy and stability of the transmission. The rack 5 can be made of high-strength aluminum alloy, which ensures strength while its light weight contributes to the operational flexibility of the entire mechanism. The rack 5 passes through the square hole 15, and the pawl 22 passes through the convex groove 16 and engages with the corresponding tooth of the rack 5.

[0032] Working principle: Before the operation begins, if the support head 7 needs to be replaced, the following operations can be performed: First, slide the U-shaped plate 18 with the U-shaped plate 26. This sliding action will compress the spring 25. As the spring 25 is compressed, the U-shaped plate 26 will gradually separate from the upper part of the ball 28. At this time, the support head 7 with the convex head 11 can be pulled out. Next, the support head 7 to be used is engaged with the inside of the square groove 13. After the engagement operation is completed, release the U-shaped plate 18. Under the action of the elastic force of the spring 25 itself, the spring 25 will squeeze the U-shaped plate 26, causing the U-shaped plate 26 to move. The movement of the U-shaped plate 26 will push the ball 28 into the circular groove 12 of the convex head 11 of the newly inserted support head 7, and the movement of the ball 28 will be restricted by the U-shaped plate 26. In this way, the support head 7 can be replaced. Since the supporting head 7 is replaceable, the problem of increased medical resource investment that may be caused when the supporting head 7 is fixed to the left lever arm 1 or the right lever arm 2 is avoided, thereby achieving the purpose of saving product use costs.

[0033] When there is a need to adjust the angle of the support head 7, the left lever arm 1 and the right lever arm 2 need to be squeezed inward. During this process, the spring clip 20 will provide an elastic pulling force to the pawl 22. This elastic pulling force allows the pawl 22 to always maintain an engaged state with the rack 5 under normal circumstances, thereby ensuring the stability of the entire structure during long-term use. When the support head 7 needs to be released, it is achieved by sliding the push plate 18. When the push plate 18 slides, it will drive the convex block 17 to slide inside the convex groove 16. This sliding process will cause the pawl 22 to disengage from the rack 5, so that the rack 5 can rotate around the rotating shaft 19 and separate from the pawl 22. When the push plate 18 is released, the spring 121 will exert an extrusion effect on the convex block 17. This extrusion effect helps the relevant components return to their initial positions, or perform elastic adjustments within a certain range. Through this operation method, the problem of being unable to fix and adjust the support angle during use and the problem of displacement due to insufficient stability can be solved.

[0034] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent replacements for some of the technical features therein. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A tissue expander for spinal surgery, characterized in that: include: A quick release mechanism is used to switch the spreading tool during use. The quick release mechanism includes a left lever arm (1) and a right lever arm (2). The joints of the left lever arm (1) and the right lever arm (2) are provided with an opening and closing assembly. The upper and lower parts of the rear sides of the left lever arm (1) and the right lever arm (2) are both provided with a convex groove (23). The interior of the convex groove (23) is slidably provided with a convex block (24). The convex block (24) is fixedly connected to the upper and lower sides of the interior of the U-shaped plate (8). , the left lever arm (1) and the right lever arm (2) are both provided with a U-shaped groove (14) on the side away from the rear part, the inner front side of the U-shaped groove (14) is fixedly connected with one end of a plurality of springs (25) at equal distances, the other end of the springs (25) is fixedly connected to the rear side of the U-shaped plate (26), the outer side of the U-shaped plate (26) is fixedly connected to the inner rear side of the U-shaped plate (8), and the rear part of the left lever arm (1) and the right lever arm (2) is provided with a support head assembly; The adjusting mechanism is used to adjust the spreading angle of the tissue spreader used for spinal surgery.

2. The tissue spreader for spinal surgery according to claim 1, characterized in that: A support head assembly, the support head assembly includes a support head (7), a convex head (11) is fixedly connected to the front middle side of the support head (7), a plurality of circular grooves (12) are evenly spaced on the front of the convex head (11), a plurality of cylindrical grooves (27) are evenly spaced on the rear side of the inner part of the U-shaped groove (14), a ball (28) is provided inside the cylindrical groove (27), the circular grooves (12) correspond to the ball (28) one by one and are engaged with each other, a square groove (13) is opened on the rear middle side of the left lever arm (1) and the right lever arm (2), and the convex head (11) is engaged with the square groove (13).

3. The tissue spreader for spinal surgery according to claim 1, characterized in that: The adjusting mechanism comprises a convex groove (16), the convex groove (16) is provided on the right front side of the right lever arm (2), one end of a spring (21) is fixedly connected to the inner front side of the convex groove (16), the other end of the spring (21) is fixedly connected to the front middle side of the convex block (17), the rear right side of the convex block (17) is rotatably connected to the front right side of the pawl (22) through a rotating shaft (19), the rear left side of the convex block (17) is fixedly connected to the front left side of the pawl (22) through a spring clip (20), the right middle side of the convex block (17) is fixedly connected to a push plate (18), a square hole (15) is provided on the right front side of the right lever arm (2), and a rack (5) is fixedly connected to the right front side of the left lever arm (1).

4. The tissue spreader for spinal surgery according to claim 3, characterized in that: The rack (5) passes through the square hole (15), and the pawl (22) passes through the convex groove (16) and engages with the corresponding teeth of the rack (5).

5. The tissue spreader for spinal surgery according to claim 2, characterized in that: The inner material of the support head (7) is stainless steel, and the outer surface of the stainless steel is provided with a titanium alloy coating.

6. The tissue spreader for spinal surgery according to claim 1, characterized in that: An opening and closing assembly comprises a screw rod (6); the opening and closing parts of the left lever arm (1) and the right lever arm (2) are fixedly connected to a second connecting block (10) and a first connecting block (9), respectively; the screw rod (6) passes through the second connecting block (10) and is threadedly connected to the first connecting block (9).

7. The tissue spreader for spinal surgery according to claim 1, characterized in that: The right front side of the left lever arm (1) and the left front side of the right lever arm (2) are respectively fixedly connected with one end of a left spring leaf (3) and one end of a right spring leaf (4), and the other end of the right spring leaf (4) passes through the rear side of the left spring leaf (3).

8. The tissue spreader for spinal surgery according to claim 1, characterized in that: The two U-shaped plates (26) are in contact with the outer sides of the balls (28).

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