Navigation device of surgical tool and surgical tool assembly

Abstract

The utility model relates to a navigation device of a surgical tool and a surgical tool assembly. The navigation device of the surgical tool comprises a first sleeve provided with a first through hole; one end of the second sleeve is arranged in the first through hole, the second sleeve is provided with a second through hole, and the surgical tool is rotatably arranged in the second through hole; the locking structure can lock the second sleeve in the first through hole; and the tracer is arranged on the first sleeve. The navigation device of the surgical tool can avoid abrasion of the locking structure, and the service life of the navigation device is prolonged.

Description

Technical Field

[0001] The present application relates to the field of medical equipment, and in particular to a navigation device for a surgical tool and a surgical tool assembly. Background Art

[0002] Surgical robots are increasingly being used in joint surgery, improving surgical efficiency and accuracy. During hip replacement surgery, a grinding tool is required, and the grinding tool and navigation device can be connected through a locking structure with a locking ball. The locking ball is engaged with the grinding tool, and the locking ball will rotate with the grinding tool during rotation, causing wear of the locking ball and affecting the use of the navigation device. Utility Model Content

[0003] Based on the above problems, the present application provides a navigation device for a surgical tool and a surgical tool assembly to avoid wear of the locking structure and increase the life of the navigation device.

[0004] In order to achieve the above effects, the technical solutions adopted in this application are as follows:

[0005] An embodiment of the present application provides a navigation device for a surgical tool, including: a first sleeve, provided with a first through hole; a second sleeve, partially disposed in the first through hole, the second sleeve provided with a second through hole, and the surgical tool rotatably disposed in the second through hole; a locking structure capable of locking the second sleeve in the first through hole; and a tracer disposed on the first sleeve.

[0006] According to some embodiments of the present application, the locking structure includes: a locking unit for limiting the movement of the second sleeve along the axis of the first through hole; and a rotation-stopping unit for limiting the rotation of the second sleeve relative to the first sleeve.

[0007] According to some embodiments of the present application, a first flange is provided on the outer wall of the first sleeve, and a ball hole and a guide hole are provided on the side wall, the ball hole and the guide hole are connected to the first through hole, and a card slot is provided on the outer wall of the second sleeve, and the locking unit includes: a sliding sleeve provided with a third through hole, an inner wall of the third through hole provided with a second flange, and the sliding sleeve is slidably provided on the first sleeve through the third through hole; a locking ball is provided in the ball hole of the first sleeve, and the second flange of the sliding sleeve can press the locking ball so that the locking ball partially enters the first through hole; an elastic member is provided between the first flange and the second flange; a guide pin is provided on the sliding sleeve, and the end of the guide pin is located in the guide hole; wherein, the outer wall of the second sleeve can lift up the locking ball, and when the card slot is opposite to the locking ball, the second flange of the sliding sleeve can press the locking ball to fit into the card slot.

[0008] According to some embodiments of the present application, a surface of the second flange away from the first flange is a slope.

[0009] According to some embodiments of the present application, the guide hole includes a first guide portion and a second guide portion that are interconnected, the first guide portion extends parallel to the axial direction of the first sleeve, and the second guide portion extends along the circumferential direction of the first sleeve.

[0010] According to some embodiments of the present application, the anti-rotation unit includes: a first anti-rotation portion, which is arranged on the outer wall of the second sleeve; a second anti-rotation portion, which is arranged on the side wall of the first sleeve, and the second anti-rotation portion is adapted to the first anti-rotation portion.

[0011] According to some embodiments of the present application, the outer wall of the second sleeve is provided with anti-slip grooves.

[0012] According to some embodiments of the present application, the navigation device of the surgical tool further includes a bushing disposed in the second through hole.

[0013] An embodiment of the present application provides a surgical tool assembly, comprising: a navigation device for a surgical tool as described above; and a surgical tool rotatably disposed in the second through hole of the second sleeve.

[0014] According to some embodiments of the present application, two retaining rings are further included, both of which are disposed on the surgical tool, and the two retaining rings are respectively located at two ends of the second sleeve.

[0015] In the navigation device of the present application, the second sleeve is rotatably connected to the surgical tool, and the second sleeve is connected to the first sleeve via a locking structure. When the surgical tool rotates, the locking structure will not be worn, thereby increasing the life of the navigation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solution of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without exceeding the scope of protection required by the present application.

[0017] Figure 1 is a schematic diagram of a navigation device for a surgical tool according to an embodiment of the present application;

[0018] Figure 2 is a cross-sectional view of a navigation device for a surgical tool according to an embodiment of the present application;

[0019] Figure 3 is a schematic diagram of a first sleeve and a tracer in an embodiment of the present application;

[0020] Figure 4is a schematic diagram of a second sleeve of an embodiment of the present application;

[0021] Figure 5 is a schematic diagram of a surgical tool connected to a second sleeve according to an embodiment of the present application;

[0022] Figure 6 is a schematic diagram of the second sleeve connected to the first sleeve in an embodiment of the present application;

[0023] Figure 7 is a schematic diagram of a first sleeve of an embodiment of the present application;

[0024] Figure 8 is a schematic diagram of a locking unit according to an embodiment of the present application;

[0025] Fig. 9 is a schematic diagram of a sliding sleeve according to an embodiment of the present application;

[0026] Fig.10 is a schematic diagram of a guide hole in an embodiment of the present application;

[0027] Fig.11 is a schematic diagram of a rotation-stopping unit according to an embodiment of the present application;

[0028] Fig.12 is a schematic diagram of a bushing according to an embodiment of the present application;

[0029] Fig.13 It is a schematic diagram of a retaining ring according to an embodiment of the present application. DETAILED DESCRIPTION

[0030] The following is a clear and complete description of the technical solution of the present application in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present application.

[0031] like Figure 1 and Figure 2 As shown, an embodiment of the present application provides a navigation device (hereinafter referred to as a navigation device) 100 for a surgical tool, and the navigation device 100 includes a first sleeve 1, a second sleeve 2, a locking structure 3, and a tracer 4. The surgical tool 200 is rotatably connected to the second sleeve 2, and the second sleeve 2 is detachably connected to the first sleeve 1 through the locking structure 3. The tracer 4 is arranged on the first sleeve 1, and the navigation system (NDI camera) of the surgical robot can identify the tracer 4 to navigate the surgical tool 200 during surgery. For example, the surgical tool 200 is an acetabular grinding rod.

[0032] like Figure 3As shown, the barrel 11 of the first sleeve 1 is roughly cylindrical. The barrel 11 is provided with a first through hole 12, and the first through hole 12 extends along the axis of the barrel 11. The outer wall of the barrel 11 is provided with a support 13, and the tracer 4 is arranged at the top of the support 13, so that the navigation system of the surgical robot can recognize the tracer 4.

[0033] like Figure 4 and Figure 5 As shown, the second sleeve 2 has a first end 2a and a second end 2b opposite to each other. The length of the second sleeve 2 is greater than that of the first sleeve 1, and the second sleeve 2 is adapted to the first through hole 12, and the second sleeve 2 is partially disposed in the first through hole 12. Among them, the first end 2a of the second sleeve 2 is located in the first through hole 12, and the second end 2b is located outside the first through hole 12. The second sleeve 2 is provided with a second through hole 21, and the second through hole 21 extends along the axis of the second sleeve 2. Optionally, the second through hole 21 is coaxial with the first through hole 12. The surgical tool 200 is rotatably coaxially disposed in the second through hole 21. The surgical tool 200 cannot move along the axis of the second through hole 21 relative to the second sleeve 2.

[0034] The second sleeve 2 is detachably connected to the first sleeve 1 via a locking structure 3. The locking structure 3 can lock the second sleeve 2 in the first through hole 12 so that the second sleeve 2 cannot move relative to the first sleeve 1.

[0035] The tracer 4 uses an existing tracer, including a reflective ball bracket and a plurality of reflective balls (not shown in the figure), and the plurality of reflective balls are asymmetrically and non-collinearly arranged on the reflective ball bracket. The navigation system of the surgical robot can identify the reflective balls of the tracer 4.

[0036] The second sleeve 2 of the navigation device 100 of the present application is detachably connected to the first sleeve 1, and the surgical tool 200 is rotatably disposed on the second sleeve 2. When the surgical tool 200 rotates, it will not cause wear of the locking structure 3, thereby improving the life of the navigation device 100.

[0037] like Figure 6 As shown, in some embodiments, the locking structure 3 includes: a locking unit 31 and a rotation-stopping unit 32. The locking unit 31 is disposed at the end of the first sleeve 1, and can limit the movement of the second sleeve 2 along the axis of the first through hole 12. The rotation-stopping unit 32 is used to limit the rotation of the second sleeve 2 relative to the first sleeve 1. After the second sleeve 2 is inserted into the first through hole 12 and installed in place, the locking structure 3 can lock and connect the second sleeve 2 and the first sleeve 1.

[0038] like Figure 7As shown, in some embodiments, a first flange 14 is provided on the outer wall of the first sleeve 1, and a ball hole 15 and a guide hole 16 are provided on the side wall. The first flange 14, the ball hole 15 and the guide hole 16 are located at the end of the first sleeve 1 close to the first end 2a of the second sleeve 2. The ball hole 15 is connected to the first through hole 12. Optionally, there are multiple ball holes 15, and the multiple ball holes 15 are evenly distributed around the axis of the first sleeve 1. The guide hole 16 is connected to the first through hole 12, and the guide hole 16 includes a portion extending parallel to the axial direction of the first sleeve 1. As shown in FIG. Figure 4 As shown, an annular groove 22 is provided on the outer wall of the second sleeve 2 , and the groove 22 is located near the first end 2 a of the second sleeve 2 .

[0039] like Figure 8 As shown, the locking unit 31 includes a sliding sleeve 33 , a locking ball 34 and an elastic member 35 .

[0040] like Fig. 9 As shown, the sliding sleeve 33 is provided with a third through hole 331, and the third through hole 331 extends along the axis of the sliding sleeve 33. The sliding sleeve 33 is slidably arranged outside the first sleeve 1 through the third through hole 331, and the sliding sleeve 33 is coaxially arranged with the first sleeve 1. The inner wall of the third through hole 331 is provided with a second flange 332, and the inner diameter of the second flange 332 is smaller than the outer diameter of the first flange 14 of the first sleeve 1.

[0041] The locking ball 34 is disposed in the ball hole 15 of the first sleeve 1. The diameter of the hole 15 connecting the first through hole 12 is smaller than the diameter of the locking ball 34. The second flange 332 can press the locking ball 34 so that the locking ball 34 is in the ball hole 15 and partially enters the first through hole 12.

[0042] The elastic member 35 is disposed between the first flange 14 and the second flange 332. Optionally, the elastic member 35 is a compression spring. The elastic member 35 can push the sliding sleeve 33 to slide in the axial direction away from the pillar 13, so that the second flange 332 presses the locking ball 34.

[0043] The guide pin 36 is arranged on the sliding sleeve 33. For example, the sliding sleeve 33 is provided with a pin hole adapted to the guide pin 36. The top end of the guide pin 36 is located in the guide hole 16 of the first sleeve 1. The guide pin 36 slides in the guide hole 16 to guide the sliding of the sliding sleeve 33. When the sliding sleeve 33 slides, the guide pin 36 abuts against the hole wall of the guide hole 16, and the sliding sleeve 33 stops sliding.

[0044] During assembly, the sleeve 33 is slid toward the direction close to the pillar 13, the elastic member 35 is compressed, and the locking ball 34 can move radially in the ball hole 15 of the first sleeve 1. The first end 2a of the second sleeve 2 is installed into the first through hole 12, and the outer wall of the second sleeve 2 lifts the locking ball 34. When the slot 22 of the second sleeve 2 corresponds to the position of the locking ball 34, the sleeve 33 is released, and the elastic member 35 pushes the sleeve 33 to slide away from the pillar 13. After the second flange 332 contacts the locking ball 34, the locking ball 34 is pressed into the slot 22, and the second sleeve 2 cannot be pulled out of the first through hole 12. When the second sleeve 2 needs to be disassembled, the sleeve 33 is slid toward the direction close to the pillar 13 so that the locking ball 34 can be moved out of the slot 22.

[0045] In some embodiments, the surface of the second flange 332 away from the first flange 14 is an inclined surface, so that the second flange 332 can press the locking ball 34 after contacting the locking ball 34 .

[0046] Optionally, the inner wall of the third through hole 331 is further provided with a third flange 334, the third flange 334 is located on the side of the second flange 332 away from the first flange 14, the inner diameter of the third flange 334 is the same as the inner diameter of the second flange 332, and the third through hole 331, the inner wall of the third through hole 331 and the second flange 332 together form a receiving groove. When the sliding sleeve 33 is slid toward the direction close to the pillar 13, the locking ball 34 can partially enter the receiving groove.

[0047] like Fig.10 As shown, in some embodiments, the guide hole 16 includes a first guide portion 161 and a second guide portion 162 that are interconnected. The first guide portion 161 extends parallel to the axial direction of the first sleeve 1, and the second guide portion 162 extends along the circumferential direction of the first sleeve 1, and the guide hole 16 is generally L-shaped. When the sleeve 33 slides in a direction away from the pillar 13, after the guide pin 36 abuts against the end of the first guide portion 161, the sleeve 33 stops sliding, and the sleeve 33 is rotated around the axis of the sleeve 33, and the guide pin 36 enters the second guide portion 162, which has a locking effect on the sliding of the sleeve 33.

[0048] like Fig.11As shown, in some embodiments, the anti-rotation unit 32 includes: a first anti-rotation portion 321 and a second anti-rotation portion 32. The first anti-rotation portion 321 is arranged on the outer wall of the second sleeve 2. For example, the second sleeve 2 is in the shape of a stepped shaft, and the first anti-rotation portion 321 is arranged on the shoulder of the second sleeve 2. The second anti-rotation portion 322 is arranged on the side wall of the first sleeve 1, and the second anti-rotation portion 322 is located at the end of the first sleeve 1 away from the first end 2a of the second sleeve 2. The second anti-rotation portion 322 is adapted to the first anti-rotation portion 321 to limit the second sleeve 2 from rotating relative to the first sleeve 1 around the axis of the first through hole 12. When the second sleeve 2 is installed in the first through hole 12 of the first sleeve 1, the anti-rotation unit 32 can also play a role in axial positioning so that the slot 22 is opposite to the locking ball 34.

[0049] For example, the first anti-rotation part 321 includes a plurality of anti-rotation teeth, and the plurality of anti-rotation teeth are evenly distributed around the axis of the second sleeve 2. The second anti-rotation part 32 includes a plurality of anti-rotation grooves matched with the anti-rotation teeth, and the anti-rotation grooves are matched with the anti-rotation teeth.

[0050] like Figure 4 As shown, in some embodiments, the outer wall of the second sleeve 2 is provided with anti-slip grooves 23. When using the surgical tool 200, it is convenient for the operator to hold the guide device 100.

[0051] like Fig.12 As shown, in some embodiments, the navigation device 100 further includes a bushing 5, which is disposed in the second through hole 21 of the second sleeve 2. For example, there are two bushings 5, which are respectively disposed at both ends of the second sleeve 2. The surgical tool 200 passes through the bushing 5 to prevent the second sleeve 2 from being worn when the surgical tool 200 rotates.

[0052] like Figure 1 As shown, an embodiment of the present application provides a surgical tool assembly, which includes: the above-mentioned surgical tool navigation device 100 and a surgical tool 200, the surgical tool 200 passes through the second through hole 21 of the second sleeve 2, and the surgical tool 200 can rotate around the axis of the second through hole 21, but cannot move along the axis of the second through hole 21. During surgery, the navigation device 100 is used to navigate the surgical tool 200.

[0053] like Fig.13 As shown, in some embodiments, the surgical tool assembly further includes two retaining rings, a first retaining ring 301 and a second retaining ring 302 are both disposed on the surgical tool 200, the first retaining ring 301 is located at the first end 2a of the second sleeve 2, and the second retaining ring 302 is located at the second end 2b of the second sleeve 2. The first retaining ring 301 and the second retaining ring 302 can limit the movement of the surgical tool 200 along the axis of the second through hole 21.

[0054] Optionally, the second retaining ring 302 is integrally formed with the surgical tool 200. After the surgical tool 200 is inserted into the second through hole 21, the first retaining ring 301 is mounted on the surgical tool 200, for example, the first retaining ring 301 and the surgical tool 200 are welded.

[0055] In the surgical tool assembly of this embodiment, the surgical tool 200 is installed in the second through hole 21, and the surgical tool 200 is rotatably connected to the second sleeve 2, and the second sleeve 2 is detachably connected to the first sleeve 1 through the locking structure 3. When the surgical tool is used, the wear of the locking structure 3 is avoided, and the life of the navigation device 100 is increased.

[0056] The embodiments of the present application are described in detail above. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solution and core ideas of the present application. Therefore, changes or deformations made by those skilled in the art based on the ideas of the present application, the specific implementation methods and the scope of application of the present application, all belong to the scope of protection of the present application. In summary, the contents of this specification should not be construed as limiting the present application.

Claims

1. A navigation device for a surgical tool, characterized in that: include: A first sleeve is provided with a first through hole; A second sleeve, partially disposed in the first through hole, the second sleeve being provided with a second through hole, the surgical tool being rotatably disposed in the second through hole; A locking structure capable of locking the second sleeve in the first through hole; A tracer is arranged on the first sleeve.

2. The navigation device for surgical tools according to claim 1, characterized in that: The locking structure comprises: A locking unit, used for limiting the movement of the second sleeve along the axis of the first through hole; The anti-rotation unit is used to limit the second sleeve from rotating relative to the first sleeve.

3. The navigation device for surgical tools according to claim 2, characterized in that: The first sleeve has a first flange on its outer wall, a ball hole and a guide hole on its side wall, both of which are connected to the first through hole, a slot on its outer wall, and the locking unit comprises: The sliding sleeve is provided with a third through hole, the inner wall of the third through hole is provided with a second flange, and the sliding sleeve is slidably arranged on the first sleeve through the third through hole; A locking ball is disposed in the ball hole of the first sleeve, and the second flange of the sliding sleeve can press the locking ball so that the locking ball partially enters the first through hole; an elastic member, disposed between the first flange and the second flange; A guide pin, disposed on the sliding sleeve, wherein an end of the guide pin is located in the guide hole; The outer wall of the second sleeve can lift up the locking ball, and when the slot is opposite to the locking ball, the second flange of the sliding sleeve can press the locking ball into the slot.

4. The navigation device for surgical tools according to claim 3, characterized in that: A surface of the second flange away from the first flange is an inclined surface.

5. The navigation device for surgical tools according to claim 3, characterized in that: The guide hole includes a first guide portion and a second guide portion that are connected to each other, the first guide portion extends parallel to the axial direction of the first sleeve, and the second guide portion extends along the circumferential direction of the first sleeve.

6. The navigation device for surgical tools according to claim 2, characterized in that: The anti-rotation unit comprises: A first anti-rotation portion, disposed on the outer wall of the second sleeve; The second anti-rotation portion is arranged on the side wall of the first sleeve, and the second anti-rotation portion is adapted to the first anti-rotation portion.

7. The navigation device for surgical tools according to claim 1, characterized in that: The outer wall of the second sleeve is provided with anti-slip grooves.

8. The navigation device for surgical tools according to claim 1, characterized in that: It also includes a bushing, which is arranged in the second through hole.

9. A surgical tool assembly, characterized in that: include: A navigation device for a surgical tool as claimed in any one of claims 1 to 8; A surgical tool is rotatably disposed in the second through hole of the second sleeve.

10. The surgical tool assembly according to claim 9, characterized in that: It also includes two retaining rings, both of which are arranged on the surgical tool, and the two retaining rings are respectively located at two ends of the second sleeve.

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