Positioning cone

Abstract

The utility model discloses a positioning cone, which relates to the field of surgical instruments and comprises a positioning rod, and a knocking mechanism is arranged at the top of the positioning rod and used for knocking the positioning rod to enable the lower end of the positioning rod to generate indentations on the bone surface of a patient. The lower end of the positioning rod is a spherical surface, a guide groove is formed in the positioning rod and used for inserting tendon lines, and a strip-shaped seam is formed in the bottom of the positioning rod and communicated with the guide groove. The device has the beneficial effects that the optimal pulling direction and the optimal anchoring point of the tendon line can be explored and pre-determined through the matching of the positioning rod and the guide groove, after the optimal anchoring point is found, the positioning rod is knocked through the knocking mechanism, so that the positioning rod generates an indentation on the bone surface of a patient, and then a threaded hole is formed in the indentation by using an electric drill; finally, the tendon lines are fixed in the threaded holes through the outer row nails, so that the accuracy of nail placement points can be improved, and the operation effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical instruments, in particular to a positioning cone. Background Art

[0002] During current arthroscopic rotator cuff suturing surgery, tendon lines are used in conjunction with anchors to achieve traction and fixation of the tendon. The tendon lines pass through the tendon, and the same end of the tendon lines is fixed to the patient's fixation head through an external row of nails. The best anchor point needs to be determined before the external row of nail holes are opened. The existing technology lacks tools for pre-determining the external row of nail placement points, and often relies on the surgeon's experience for positioning, which is somewhat blind. If the placement point is not ideal, it will affect the quality of the rotator cuff suturing, and once the nail holes are prepared, it is not easy to change them. Utility Model Content

[0003] The purpose of the present invention is to provide a positioning cone in order to solve the above problems, as described below.

[0004] To achieve the above objectives, the present invention provides the following technical solutions:

[0005] The utility model provides a positioning cone, comprising a positioning rod, wherein a knocking mechanism is provided on the top of the positioning rod for knocking the positioning rod so that the lower end of the positioning rod produces an indentation on the patient's bone surface;

[0006] The lower end of the positioning rod is spherical, and a guide groove is provided on the positioning rod for inserting the tendon line. A strip-shaped seam is provided at the bottom of the positioning rod, and the strip-shaped seam is communicated with the guide groove.

[0007] Using the above-mentioned positioning cone, the tendon line passing through the tendon is passed into the guide groove through the strip seam. The surgical operator pulls the tendon line away from one end of the tendon with one hand and moves the positioning rod with the other hand. The positioning rod and the guide groove can be used to explore and pre-determine the best pulling direction and the best anchor point of the tendon line. When the best anchor point is found, the positioning rod is knocked by the knocking mechanism to make the positioning rod produce an indentation on the patient's bone surface. Then, a threaded hole can be opened at the indentation using an electric drill, and finally the tendon line is fixed in the threaded hole using an anchor nail.

[0008] Preferably, both ends of the guide groove penetrate into the surface of the positioning rod, and a first chamfer is provided at the junction of the guide groove and the strip-shaped seam.

[0009] Preferably, a second chamfer is provided at the junction of the strip-shaped seam and the lower end of the positioning rod.

[0010] Preferably, the width of the strip seam is less than or equal to the diameter of the tendon line.

[0011] Preferably, the knocking mechanism includes a guide rod, a guide rod is vertically arranged on the upper end of the guide rod, a counterweight sleeve is slidably arranged on the surface of the guide rod, and a spring is provided on the surface of the guide rod for pushing the counterweight sleeve downward. A lifting assembly is provided on the guide rod for moving the counterweight sleeve away from the positioning rod, and a trigger assembly is provided on the lifting assembly. The trigger assembly and the lifting assembly cooperate to fix the counterweight sleeve that is detached from the positioning rod.

[0012] Preferably, the lifting assembly includes a fixed arm and a pull rod, the fixed arm is fixed on the guide rod, the pull rod is vertically arranged on the counterweight sleeve, the pull rod passes through the fixed arm and is slidably connected to the fixed arm, a handle is provided on the pull rod, and a number of card holes are vertically distributed on the pull rod.

[0013] Preferably, the bottom of the counterweight sleeve corresponds to the upper end of the positioning rod, the two ends of the spring are respectively fixed to the counterweight sleeve and the fixed arm, and an elastic scale is provided on the surface of the guide rod.

[0014] Preferably, the trigger assembly includes a handle and a spring pin, the handle is fixed on the fixed arm, one end of the fixed pin of the spring pin is plugged into the card hole, and the other end is provided with a pull ring.

[0015] The beneficial effects are:

[0016] 1. The positioning rod and the guide groove can be used to explore and pre-determine the optimal pulling direction and the optimal anchoring point of the tendon line. Once the optimal anchoring point is found, the positioning rod is struck by the knocking mechanism to create an indentation on the patient's bone surface. Then, a threaded hole can be opened at the indentation using an electric drill. Finally, the tendon line is fixed in the threaded hole using an external nail, thereby improving the accuracy of the nail placement point and enhancing the surgical effect.

[0017] 2. The impact force of the knocking mechanism on the positioning rod is adjustable, so that it can be suitable for people with different bone densities, thereby improving the application range of the positioning cone. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 This is a front view structural diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model;

[0021] Figure 3 It is a schematic diagram of the three-dimensional structure of the positioning rod of the utility model.

[0022] The following are the descriptions of the reference numerals:

[0023] 1. Positioning rod; 2. Striking mechanism; 3. Guide groove; 4. Strip slit; 5. First chamfer; 6. Second chamfer; 7. Guide rod; 8. Spring; 9. Elasticity scale; 10. Counterweight sleeve; 11. Trigger assembly; 12. Fixed arm; 13. Handle; 14. Spring pin; 15. Pull ring; 16. Pull rod; 17. Handle; 18. Pull assembly. DETAILED DESCRIPTION

[0024] To make the purpose, technical solution, and advantages of the present invention more clear, the technical solution of the present invention will be described in detail below. Obviously, the embodiments described are only some of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-Figure 3 As shown, the utility model provides a positioning cone, including a positioning rod 1, a knocking mechanism 2 is provided on the top of the positioning rod 1, which is used to knock the positioning rod 1 so that the lower end of the positioning rod 1 produces an indentation on the patient's bone surface;

[0026] The lower end of the positioning rod 1 is spherical, and the spherical surface is set so that the lower end of the positioning rod 1 is in point contact with the patient's bone surface, which makes it easier for the positioning rod 1 to move on the bone surface, and the indentation produced is more regular and accurate;

[0027] A guide groove 3 is provided on the positioning rod 1 for inserting the tendon line. A strip slit 4 is provided at the bottom of the positioning rod 1 , and the strip slit 4 is communicated with the guide groove 3 .

[0028] As an optional embodiment, both ends of the guide groove 3 pass through the surface of the positioning rod 1, and a first chamfer 5 is provided at the junction of the guide groove 3 and the strip seam 4. The provision of the first chamfer 5 makes the junction of the guide groove 3 and the strip seam 4 smoother, which facilitates pulling the tendon line out of the guide groove 3.

[0029] A second chamfer 6 is provided at the junction of the strip seam 4 and the lower end of the positioning rod 1. The second chamfer 6 is provided to facilitate the insertion of the tendon line into the strip seam 4 on the one hand, and to prevent the lower edge of the strip seam 4 from scratching the bone surface when the lower end of the positioning rod 1 contacts the bone surface on the other hand.

[0030] The width of the strip seam 4 is less than or equal to the diameter of the tendon line, which can prevent the tendon line from easily passing through the strip seam 4 and detaching from the guide groove 3. The tendon line is elastic and deformable, so when the width of the strip seam 4 is slightly smaller than the diameter of the tendon line, the tendon line can still pass through the strip seam 4.

[0031] The striking mechanism 2 includes a guide rod 7, a guide rod 7 is vertically provided at the upper end of the guide rod 7, a counterweight sleeve 10 is slidably provided on the surface of the guide rod 7, a spring 8 is provided on the surface of the guide rod 7 for pushing the counterweight sleeve 10 downward, a lifting assembly 18 is provided on the guide rod 7 for moving the counterweight sleeve 10 away from the positioning rod 1, and a trigger assembly 11 is provided on the lifting assembly 18. The trigger assembly 11 cooperates with the lifting assembly 18 to fix the counterweight sleeve 10 that is separated from the positioning rod 1;

[0032] The counterweight sleeve 10 is moved away from the positioning rod 1 by the lifting assembly 18. Then the spring 8 will be compressed, and the position of the counterweight sleeve 10 will be fixed by the cooperation of the trigger assembly 11 and the lifting assembly 18. When it is necessary to knock the positioning rod 1, the trigger assembly 11 releases the fixation of the lifting assembly 18. Then the spring 8 will quickly push the counterweight sleeve 10, causing the counterweight sleeve 10 to hit the positioning rod 1, generating an impact force, and causing the positioning rod 1 to produce an indentation on the patient's bone surface.

[0033] The lifting assembly 18 includes a fixed arm 12 and a pull rod 16. The fixed arm 12 is fixed to the guide rod 7. The pull rod 16 is vertically arranged on the counterweight sleeve 10. The pull rod 16 passes through the fixed arm 12 and is slidably connected to the fixed arm 12. A handle 17 is provided on the pull rod 16. A plurality of clamping holes are vertically distributed on the pull rod 16. The pull rod 16 is driven by the handle 17 to enable the counterweight sleeve 10 to move along the guide rod 7.

[0034] The bottom of the weight sleeve 10 corresponds to the upper end of the positioning rod 1, and the two ends of the spring 8 are fixed to the weight sleeve 10 and the fixed arm 12 respectively. The surface of the guide rod 7 is provided with an elastic scale 9. The elastic scale 9 is provided to facilitate the operator to grasp the impact force generated by the weight sleeve 10 at different heights, so as to be suitable for people with different bone densities;

[0035] The trigger assembly 11 includes a handle 13 and a spring pin 14. The handle 13 is fixed to the fixed arm 12. One end of the fixed pin of the spring pin 14 is plugged into the card hole, and the other end is provided with a pull ring 15.

[0036] Inserting the fixing pin of the spring pin 14 into the card hole can fix the position of the pull rod 16, thereby fixing the position of the counterweight sleeve 10. When it is necessary to knock the positioning rod 1, pull the fixing pin through the pull ring 15 to disengage it from the card hole. At this time, the pull rod 16 and the counterweight sleeve 10 will quickly approach the positioning rod 1 and complete the impact on the positioning rod 1.

[0037] Using the above structure, the tendon line passing through the tendon is inserted into the guide groove 3 through the strip seam 4. The surgical operator pulls the tendon line away from one end of the tendon with one hand and moves the positioning rod 1 with the other hand. The positioning rod 1 and the guide groove 3 can be used to explore and pre-determine the best pulling direction and the best anchor point of the tendon line. After finding the best anchor point, the positioning rod 1 is knocked by the knocking mechanism 2, so that the positioning rod 1 produces an indentation on the patient's bone surface. Then, a threaded hole can be opened at the indentation using an electric drill, and finally the tendon line is fixed in the threaded hole using an anchor nail.

[0038] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A positioning cone, characterized in that: It comprises a positioning rod (1), wherein a knocking mechanism (2) is provided on the top of the positioning rod (1) for knocking the positioning rod (1) so that the lower end of the positioning rod (1) produces an indentation on the patient's bone surface; The lower end of the positioning rod (1) is spherical, and a guide groove (3) is provided on the positioning rod (1) for inserting the tendon line. A strip slit (4) is provided at the bottom of the positioning rod (1), and the strip slit (4) is connected to the guide groove (3).

2. A positioning cone according to claim 1, characterized in that: Both ends of the guide groove (3) penetrate the surface of the positioning rod (1), and a first chamfer (5) is provided at the junction of the guide groove (3) and the strip-shaped slit (4).

3. A positioning cone according to claim 1, characterized in that: A second chamfer (6) is provided at the junction of the strip-shaped slit (4) and the lower end of the positioning rod (1).

4. A positioning cone according to claim 1, characterized in that: The width of the strip-shaped seam (4) is less than or equal to the diameter of the tendon line.

5. The positioning cone according to claim 1, characterized in that: The knocking mechanism (2) includes a guide rod (7), a guide rod (7) is vertically provided on the upper end of the guide rod (7), a counterweight sleeve (10) is slidably provided on the surface of the guide rod (7), a spring (8) is provided on the surface of the guide rod (7) for pushing the counterweight sleeve (10) downward, a lifting assembly (18) is provided on the guide rod (7) for moving the counterweight sleeve (10) away from the positioning rod (1), a trigger assembly (11) is provided on the lifting assembly (18), and the trigger assembly (11) cooperates with the lifting assembly (18) to fix the counterweight sleeve (10) that is separated from the positioning rod (1).

6. A positioning cone according to claim 5, characterized in that: The lifting assembly (18) includes a fixed arm (12) and a pull rod (16), wherein the fixed arm (12) is fixed on the guide rod (7), and the pull rod (16) is vertically arranged on the counterweight sleeve (10), and the pull rod (16) passes through the fixed arm (12) and is slidably connected to the fixed arm (12), and a handle (17) is provided on the pull rod (16), and a plurality of card holes are vertically distributed on the pull rod (16).

7. A positioning cone according to claim 6, characterized in that: The bottom of the counterweight sleeve (10) corresponds to the upper end of the positioning rod (1), the two ends of the spring (8) are respectively fixed to the counterweight sleeve (10) and the fixed arm (12), and the surface of the guide rod (7) is provided with an elastic scale (9).

8. The positioning cone according to claim 6, characterized in that: The trigger assembly (11) comprises a handle (13) and a spring pin (14). The handle (13) is fixed on the fixed arm (12). One end of the fixed pin of the spring pin (14) is plugged into the card hole, and the other end is provided with a pull ring (15).

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