Filing rod mechanism and operation auxiliary instrument

Abstract

The utility model provides a file rod mechanism and an operation auxiliary instrument. The file rod mechanism comprises a file rod shaft, a file rod and a file rod, the power input part is connected with the first end, and the power input part is used for being connected with a power mechanism; the fixing part is connected with the second end, and a plurality of clamping grooves are sequentially formed in the fixing part around the axis of the fixing part; the filing part is detachably connected with the fixing part, the filing part is sequentially provided with a plurality of clamping shafts around the axis of the filing part, and the clamping shafts can be clamped in the clamping grooves in a one-to-one correspondence mode; the locking part is arranged on the file rod shaft and located between the first end and the second end, and the locking part is used for being matched with a locking pin of a guider base of the operation auxiliary instrument; the bearing part is arranged on the filing rod shaft and located between the first end and the locking part, and the bearing part is used for being in running fit with the guider base. By the adoption of the technical scheme, the file rod mechanism can be rapidly replaced, operation time is shortened, operation quality is improved, meanwhile, the structure is simple and effective, and it is guaranteed that the file rod mechanism is light and easy to use.

Description

Technical Field

[0001] The utility model relates to the technical field of surgical auxiliary instruments, and more particularly to a file rod mechanism and a surgical auxiliary instrument. Background Art

[0002] Orthopedic surgical robots need to have high positioning accuracy and more efficient and precise surgical auxiliary instruments. For example, in hip replacement surgery, the pelvic acetabulum needs to be accurately ground and the acetabular prosthesis needs to be accurately implanted. The acetabular grinding and implantation of the acetabular prosthesis are based on the same base. When facing surgical patients of different weights, there will be different choices of acetabular grinding and implantation instruments. When facing acetabular prostheses from different manufacturers, the acetabular cup connection thread specifications are different, and implantation instruments with different thread specifications are required for prosthesis implantation. At the same time, the surgical process of the orthopedic surgical robot should be monitorable and controllable. Therefore, in order to meet the requirements, the following requirements are put forward for hip replacement surgical auxiliary instruments: First, the functional components of the product need to be able to be quickly replaced to reduce the operation time and improve the quality of the operation; second, the product structure must be simple and effective to ensure that the product is light and easy to use; third, the product must meet sufficient rigidity and stability to ensure the performance of the product. Utility Model Content

[0003] The purpose of the utility model is to provide a file rod mechanism and a surgical auxiliary instrument to solve the technical problems existing in the prior art.

[0004] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0005] In a first aspect, a file rod mechanism is provided, comprising:

[0006] a rasp shaft defining opposed first and second ends;

[0007] a power input portion connected to the first end, the power input portion being used to connect to a power mechanism;

[0008] a fixing portion connected to the second end, wherein the fixing portion is sequentially provided with a plurality of engaging grooves around its own axis;

[0009] a filing portion detachably connected to the fixing portion, the filing portion being used to realize a filing function, the filing portion being sequentially provided with a plurality of engaging shafts around its own axis, the engaging shafts being capable of being engaged in the engaging grooves in a one-to-one correspondence;

[0010] a locking portion, provided on the file rod shaft and located between the first end and the second end, the locking portion being configured to cooperate with a locking pin of a guide base of a surgical auxiliary instrument;

[0011] A bearing portion is provided on the file rod shaft and is located between the first end and the locking portion, and the bearing portion is used for rotationally cooperating with the guide base.

[0012] By adopting the above technical solution, the file part of the file rod mechanism can be quickly replaced, reducing the operation time and improving the quality of the operation. At the same time, the file rod mechanism has a simple and effective structure, ensuring that the file rod mechanism is light and easy to use. In addition, the file rod mechanism also meets sufficient rigidity and stability to ensure the performance of the product.

[0013] In one embodiment, the locking groove includes an entrance section and a fixed section connected to the entrance section, the entrance section forms a slot for the locking shaft to enter, the entrance section is arranged parallel to the axis of the fixed part, and the fixed section is arranged perpendicular to the axis of the fixed part.

[0014] By adopting the above technical solution, the stability of the fixed connection between the filing portion and the fixing portion is improved.

[0015] In one embodiment, a locking shaft is provided in the fixing section, the locking shaft is elastically connected to the groove wall of the fixing section, and the locking shaft is used to lock the engaging shaft in the fixing section.

[0016] By adopting the above technical solution, the stability of the engaging shaft when it is fixed in the engaging groove is further improved.

[0017] In one embodiment, the locking portion is provided with a locking end surface for abutting against the locking pin, and the locking end surface is arranged in a direction away from the first end.

[0018] By adopting the above technical solution, the limiting cooperation between the locking part and the locking pin is achieved.

[0019] In one embodiment, the bearing portion includes a bearing fixing sleeve, a bearing arranged in the bearing fixing sleeve, and a gap adjustment gasket; the bearing fixing sleeve is arranged on the file rod shaft, the outer ring of the bearing is connected to the bearing fixing sleeve, the inner ring of the bearing is connected to the file rod shaft, and the gap adjustment gasket is arranged between the inner ring and the file rod shaft.

[0020] By adopting the above technical solution, the flexibility of adjusting the file rod shaft is improved.

[0021] In one embodiment, the file rod mechanism is a straight file rod mechanism, and the file rod mechanism also includes a first adapter portion connecting the file portion and the second end, the first adapter portion includes a spring limit sleeve, a locking spring and a fixing structure, the spring limit sleeve is connected to the second end, the fixing structure is connected to the fixing portion, and the locking spring connects the spring limit sleeve and the fixing portion.

[0022] By adopting the above technical solution, the force acting on the acetabulum by the rasp during rasp grinding is reduced, thereby reducing damage to the acetabulum.

[0023] In one embodiment, the spring limiting sleeve is detachably connected to the second end.

[0024] By adopting the above technical solution, the spring limit sleeve is easy to disassemble, which is beneficial for maintenance and cleaning.

[0025] In one embodiment, the file rod mechanism is a bent file rod mechanism, and the file rod mechanism also includes a second adapter portion connecting the file portion and the second end, the second adapter portion is bent in shape, and the second adapter portion is provided with a positioning pin for being clamped into the positioning hole of the guide base.

[0026] By adopting the above technical solution, the applicability of the file rod mechanism is improved.

[0027] In one embodiment, the second adapter portion includes a bent pipe and a universal shaft disposed in the bent pipe, the bent pipe is provided with the positioning pin, and the universal shaft connects the file rod shaft and the fixing portion.

[0028] By adopting the above technical solution, the structure of the bending file rod mechanism is simplified.

[0029] In a second aspect, a surgical auxiliary instrument is provided, comprising a power mechanism and the above-mentioned file rod mechanism, wherein the power mechanism is connected to the file rod mechanism.

[0030] By adopting the above technical solution, on the basis of having the advantages of the file rod mechanism of the above embodiment, the surgical auxiliary instrument of this embodiment also has the advantage of strong applicability. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. 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.

[0032] Figure 1 It is a three-dimensional structural diagram of the straight file rod mechanism provided by an embodiment of the utility model.

[0033] Figure 2 It is an exploded view of the straight file rod mechanism provided in an embodiment of the utility model.

[0034] Figure 3 It is an exploded view of the straight filing portion and the fixing portion provided in an embodiment of the present utility model.

[0035] Figure 4It is a cross-sectional view of the straight file rod mechanism provided by an embodiment of the utility model.

[0036] Figure 5 yes Figure 4 Magnified view of point “A” in the figure.

[0037] Figure 6 yes Figure 4 Magnified view of point “B” in the figure.

[0038] Figure 7 It is a three-dimensional structural diagram of the bending file rod mechanism provided in an embodiment of the utility model.

[0039] Figure 8 It is an exploded view of the bending file rod mechanism provided in an embodiment of the utility model.

[0040] The reference numerals in the figures are:

[0041] 1. File rod shaft; 2. Power input part; 3. Fixing part; 4. File part; 5. Locking part; 6. Bearing part; 7. First adapter part; 8. Second adapter part;

[0042] 31. Engaging groove; 41. Engaging shaft; 51. Locking end face; 61. Bearing fixing sleeve; 62. Bearing; 63. Gap adjustment washer; 71. Spring limiting sleeve; 72. Locking spring; 73. Fixing structure; 81. Positioning pin; 82. Bend pipe; 83. Universal joint;

[0043] 311. Entrance section; 312. Fixed section; 313. Locking shaft. DETAILED DESCRIPTION

[0044] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0045] It should be noted that when an element is referred to as being “fixed to” or “disposed on” another element, it may be directly located on the other element or indirectly located on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0046] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate that the device or element must have a specific orientation, be constructed and operate in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate relative importance or the number of technical features. In the description of this utility model, "plurality" means two or more, unless otherwise specifically defined. The following is a more detailed description of the specific implementation of this utility model in conjunction with specific embodiments:

[0048] like Figure 1 and Figure 2 As shown, a file rod mechanism provided by an embodiment of the present invention is used to be configured in a surgical auxiliary instrument. For example, in hip replacement surgery, it is necessary to accurately grind and file the pelvic acetabulum and accurately implant the acetabular prosthesis. The acetabular grinding and acetabular prosthesis implantation are performed based on the same base; therefore, the file rod mechanism provided by this embodiment can realize the grinding and filing of the acetabulum, so that it meets the conditions for prosthesis implantation; the file rod mechanism provided by this embodiment has product functional components that can be quickly replaced, reducing operation time and improving operation quality. At the same time, the product structure is simple and effective, ensuring that the product is light and easy to use. In addition, the product also meets sufficient rigidity and stability to ensure the performance of the product. The following is an explanation through specific implementation methods:

[0049] The file rod mechanism of this embodiment includes:

[0050] A file shaft 1 is defined with a first end and a second end opposite to each other;

[0051] A power input part 2 is connected to the first end and is used to connect to the power mechanism;

[0052] The fixing portion 3 is connected to the second end, and the fixing portion 3 is sequentially provided with a plurality of engaging grooves 31 around its own axis;

[0053] The filing portion 4 is detachably connected to the fixing portion 3 and is used to realize the filing function. The filing portion 4 is sequentially provided with a plurality of engaging shafts 41 around its own axis. The engaging shafts 41 can be respectively engaged in the engaging grooves 31.

[0054] A locking portion 5 is provided on the file rod shaft 1 and is located between the first end and the second end, and the locking portion 5 is used to cooperate with a locking pin of a guide base of a surgical auxiliary instrument;

[0055] The bearing portion 6 is provided on the file rod shaft 1 and is located between the first end and the locking portion 5. The bearing portion 6 is used for rotationally cooperating with the guide base.

[0056] Here, it can be understood that the file rod shaft 1 refers to the shaft body of the file rod mechanism, and the file rod shaft 1 is used to transmit power from the power mechanism, so that the power can be transmitted to the file part 4 through the file rod shaft 1; the file rod shaft 1 is defined with a first end and a second end opposite to each other. In this embodiment, the file rod shaft 1 has two opposite ends, one of which is the first end and the other is the second end;

[0057] The power input part 2 is a component for receiving power transmitted by the power mechanism; the power input part 2 is connected to the first end. In this embodiment, the power input part 2 is formed on the file rod shaft 1, that is, the power input part 2 and the file rod shaft 1 are integrally formed.

[0058] The fixing portion 3 is a component for fixing to the file shaft 1; the fixing portion 3 is connected to the second end and is used to connect the file shaft 1 and the file portion 4; the fixing portion 3 is sequentially provided with a plurality of engaging grooves 31 around its own axis, that is, the plurality of engaging grooves 31 are sequentially arranged along the circumference of the fixing portion 3;

[0059] The file portion 4 is a component used to perform the filing function. A plurality of file protrusions are provided on the surface of the file portion 4, which enable the acetabulum to be filed. The file portion 4 is provided with a plurality of engaging shafts 41 arranged in sequence around its own axis. That is, the plurality of engaging shafts 41 are arranged in sequence along the circumference of the file portion 4, and the engaging shafts 41 can be correspondingly engaged in the engaging grooves 31 one by one.

[0060] The locking portion 5 is a component used to lock the file rod shaft 1 on the guide base. The locking portion 5 is provided on the file rod shaft 1 and is also located between the first end and the second end. The locking portion 5 is used to cooperate with the locking pin of the guide base of the surgical auxiliary instrument.

[0061] The bearing portion 6 is used to enable the file rod shaft 1 to rotate around the axis when used in conjunction with the guide base, thereby enabling the file rod shaft 1 to drive the file portion 4 to rotate around the axis, thereby realizing the basic function of the file.

[0062] The working principle of the file rod mechanism provided in this embodiment is as follows:

[0063] Aim the file part 4 at the acetabulum to be operated on, and connect the power mechanism to the power input part 2. In this way, the power output by the power mechanism can act on the file part 4 through the file rod shaft 1, so that the file part 4 acts on the acetabulum; at the same time, the file rod shaft 1 is fixed to the guide base through the locking part 5, so that the file rod shaft 1 and the guide base are relatively fixed in the axial direction; in addition, the file rod shaft 1 is rotated relative to the guide base through the bearing part 6, which is beneficial for the file part 4 to rotate around the axis according to actual surgical needs; finally, the file part 4 is detachable from the fixing part 3, so that the file part 4 can be cleaned and replaced.

[0064] By adopting the above technical solution, the file part 4 of the file rod mechanism can be quickly replaced, reducing the operation time and improving the operation quality. At the same time, the file rod mechanism has a simple and effective structure, ensuring that the file rod mechanism is light and easy to use. In addition, the file rod mechanism also meets sufficient rigidity and stability to ensure the performance of the product.

[0065] like Figure 3 As shown, in one embodiment, the locking groove 31 includes an entrance section 311 and a fixed section 312 connected to the entrance section 311, the entrance section 311 forms a slot for the locking shaft 41 to enter, the entrance section 311 is arranged parallel to the axis of the fixing part 3, and the fixed section 312 is arranged perpendicular to the axis of the fixing part 3.

[0066] It can be understood here that the engaging groove 31 is for the engaging shaft 41 to be engaged, and the engaging groove 31 is set to an L-shaped groove structure, which reduces the risk of the engaging shaft 41 detaching from the engaging groove 31 and improves the stability of the engaging shaft 41 when engaged; specifically, the engaging groove 31 includes an entrance section 311 and a fixed section 312, the fixed section 312 is connected to the entrance section 311, and the entrance section 311 is formed with a notch for the engaging shaft 41 to enter; wherein, the extension direction of the entrance section 311 is parallel to the axis of the fixing part 3, and the extension direction of the fixed section 312 is parallel to the axis of the fixing part 3, so that the engaging shaft 41 enters the entrance section 311 from the notch and then enters the fixed section 312. Since the entrance section 311 is perpendicular to the fixed section 312, the engaging shaft 41 is not easy to detach from the engaging groove 31.

[0067] By adopting the above technical solution, the stability of the fixed connection between the filing portion 4 and the fixing portion 3 is improved.

[0068] It needs to be further explained that, since the multiple engaging grooves 31 and the multiple engaging shafts 41 are arranged in sequence around the axis, when the file part 4 and the fixing part 3 are engaged, the file part 4 rotates around the axis so that the engaging shaft 41 can be aligned with the engaging groove 31 and engaged. When entering the fixing section 312 from the entrance section 311, the file part 4 can be rotated again so that the engaging shaft 41 is engaged in the fixing section 312. This fixing method is simple to operate.

[0069] In one embodiment, a locking shaft 313 is provided in the fixing section 312 . The locking shaft 313 is elastically connected to the groove wall of the fixing section 312 . The locking shaft 313 is used to lock the engaging shaft 41 in the fixing section 312 .

[0070] Here, it can be understood that the locking shaft 313 refers to the shaft body used to lock the locking shaft 41 in the fixed section 312; the locking shaft 313 is elastically connected to the groove wall of the fixed section 312, so that the elastic force of the locking shaft 313 can limit the locking shaft 41 in the fixed section 312.

[0071] By adopting the above technical solution, the stability of the engaging shaft 41 when being fixed in the engaging groove 31 is further improved.

[0072] In one embodiment, the locking portion 5 is provided with a locking end surface 51 for abutting against the locking pin, and the locking end surface 51 is arranged in a direction away from the first end.

[0073] Here, it can be understood that the locking end face 51 refers to the surface used to abut against the locking pin, and the locking end face 51 is set in the direction away from the first end, that is, the locking end face 51 is located on the surface of the locking part 5 away from the first end, that is, after the locking end face 51 abuts against the locking pin, the locking pin and the locking end face 51 are arranged relative to each other, and the locking pin can limit the axial movement of the locking end face 51, thereby limiting the movement of the file rod shaft 1.

[0074] By adopting the above technical solution, the limiting cooperation between the locking portion 5 and the locking pin is achieved.

[0075] like Figure 4 and Figure 5 As shown, in one embodiment, the bearing portion 6 includes a bearing fixing sleeve 61, a bearing 62 arranged in the bearing fixing sleeve 61, and a gap adjustment gasket 63; the bearing fixing sleeve 61 is arranged on the file rod shaft 1, the outer ring of the bearing 62 is connected to the bearing fixing sleeve 61, the inner ring of the bearing 62 is connected to the file rod shaft 1, and the gap adjustment gasket 63 is arranged between the inner ring and the file rod shaft 1.

[0076] Here, it can be understood that the bearing part 6 includes a bearing fixing sleeve 61, a bearing 62 and a gap adjustment gasket 63, the bearing fixing sleeve 61 is used to fix the bearing 62, so that the bearing 62 can be connected to the file rod shaft 1; the bearing 62 includes an outer ring and an inner ring, wherein the outer ring is connected to the bearing fixing sleeve 61, and the inner ring is connected to the file rod shaft 1, so that the file rod shaft 1 can rotate around the axis relative to the bearing fixing sleeve 61; in addition, since there is a gap between the inner ring and the file rod shaft 1, a gap adjustment gasket 63 is set in the gap, so that the gap between the inner ring and the file rod shaft 1 is adjustable, which is beneficial to the cooperation between the file rod shaft 1 and the bearing 62, and reduces the error when the file rod shaft 1 moves.

[0077] By adopting the above technical solution, the flexibility of adjusting the file rod shaft 1 is improved.

[0078] Please also refer to Figure 1 、 Figure 2 and Figure 6 As shown, in one embodiment, the file rod mechanism also includes a first adapter portion 7 connecting the file portion 4 and the second end, the first adapter portion 7 includes a spring limit sleeve 71, a locking spring 72 and a fixing structure 73, the spring limit sleeve 71 is connected to the second end, the fixing structure 73 is connected to the fixing portion 3, and the locking spring 72 connects the spring limit sleeve 71 and the fixing portion 3.

[0079] Here, it can be understood that the file rod mechanism in this embodiment is a straight file rod mechanism. At the same time, the file rod mechanism also includes a first adapter part 7, which includes a spring limit sleeve 71, a locking spring 72 and a fixing structure 73; in this way, an elastic structure is provided between the file part 4 and the second end, which reduces the force acting on the acetabulum when the file part 4 is filing, thereby reducing damage to the acetabulum.

[0080] It needs to be further explained that the fixing structure 73 can be a flange structure.

[0081] By adopting the above technical solution, the force exerted by the rasp portion 4 on the acetabulum during rasp grinding is reduced, thereby reducing damage to the acetabulum.

[0082] In one embodiment, the spring limiting sleeve 71 is detachably connected to the second end.

[0083] Here, it can be understood that the spring limit sleeve 71 of the straight file rod is provided with a limit groove and a through hole, which can be radially rotated 90 degrees and disengaged from the limit pin of the file rod shaft 1, so that the locking spring 72 and the acetabular file locking sleeve can be loosened for easy maintenance and cleaning.

[0084] By adopting the above technical solution, the spring limiting sleeve 71 is easy to disassemble, which is beneficial for maintenance and cleaning.

[0085] like Figure 7 and Figure 8 As shown, in one embodiment, the file rod mechanism further includes a second adapter portion 8 connecting the file portion 4 and the second end. The second adapter portion 8 is bent in shape and is provided with a positioning pin 81 for snapping into the positioning hole of the guide base.

[0086] Here, it can be understood that the file rod mechanism in this embodiment is a bent file rod mechanism. At the same time, the file rod mechanism also includes a second adapter part 8, and the second adapter part 8 is provided with a positioning pin 81. The positioning pin 81 is used to be inserted into the positioning hole of the guide base, thereby limiting the rotation of the second adapter part 8 around the axis.

[0087] By adopting the above technical solution, the applicability of the file rod mechanism is improved.

[0088] In one embodiment, the second adapter portion 8 includes a curved tube 82 and a universal shaft 83 disposed in the curved tube 82 . The curved tube 82 is provided with a positioning pin 81 . The universal shaft 83 connects the file rod shaft 1 and the fixing portion 3 .

[0089] Here, it can be understood that the curved tube 82 can be a Z-shaped tube.

[0090] By adopting the above technical solution, the structure of the bending file rod mechanism is simplified.

[0091] In a second aspect, a surgical auxiliary instrument is provided, comprising a power mechanism and the above-mentioned file rod mechanism, wherein the power mechanism is connected to the file rod mechanism.

[0092] Here, it can be understood that the power mechanism can be a motor, an electric drill, a manipulator, etc.

[0093] By adopting the above technical solution, on the basis of having the advantages of the file rod mechanism of the above embodiment, the surgical auxiliary instrument of this embodiment also has the advantage of strong applicability.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements and improvements 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 file rod mechanism, characterized in that: include: a rasp shaft defining opposed first and second ends; a power input portion connected to the first end, the power input portion being used to connect to a power mechanism; a fixing portion connected to the second end, wherein the fixing portion is sequentially provided with a plurality of engaging grooves around its own axis; a filing portion detachably connected to the fixing portion, the filing portion being used to realize a filing function, the filing portion being sequentially provided with a plurality of engaging shafts around its own axis, the engaging shafts being capable of being engaged in the engaging grooves in a one-to-one correspondence; a locking portion, provided on the file rod shaft and located between the first end and the second end, the locking portion being configured to cooperate with a locking pin of a guide base of a surgical auxiliary instrument; A bearing portion is provided on the file rod shaft and is located between the first end and the locking portion, and the bearing portion is used for rotationally cooperating with the guide base.

2. The file bar mechanism according to claim 1, wherein: The engaging groove includes an entrance section and a fixing section connected to the entrance section, the entrance section forms a slot for the engaging shaft to enter, the entrance section is arranged parallel to the axis of the fixing portion, and the fixing section is arranged perpendicular to the axis of the fixing portion.

3. The file bar mechanism according to claim 2, wherein: A locking shaft is provided in the fixing section, the locking shaft is elastically connected to the groove wall of the fixing section, and the locking shaft is used to lock the engaging shaft in the fixing section.

4. The file bar mechanism according to claim 1, wherein: The locking portion is provided with a locking end surface for abutting against the locking pin, and the locking end surface is arranged in a direction away from the first end.

5. The file bar mechanism according to claim 1, wherein: The bearing part includes a bearing fixing sleeve, a bearing arranged in the bearing fixing sleeve, and a gap adjustment gasket; the bearing fixing sleeve is arranged on the file rod shaft, the outer ring of the bearing is connected to the bearing fixing sleeve, the inner ring of the bearing is connected to the file rod shaft, and the gap adjustment gasket is arranged between the inner ring and the file rod shaft.

6. The file bar mechanism according to claim 1, wherein: The file rod mechanism is a straight file rod mechanism, and the file rod mechanism also includes a first adapter portion connecting the file portion and the second end, the first adapter portion includes a spring limit sleeve, a locking spring and a fixing structure, the spring limit sleeve is connected to the second end, the fixing structure is connected to the fixing portion, and the locking spring connects the spring limit sleeve and the fixing portion.

7. The file bar mechanism according to claim 6, wherein: The spring limiting sleeve is detachably connected to the second end.

8. The file bar mechanism according to claim 1, wherein: The file rod mechanism is a bent file rod mechanism, and the file rod mechanism also includes a second adapter portion connecting the file portion and the second end. The second adapter portion is bent in shape and is provided with a positioning pin for being clamped into the positioning hole of the guide base.

9. The file bar mechanism according to claim 8, wherein: The second adapter portion includes a bent pipe and a universal shaft arranged in the bent pipe. The bent pipe is provided with the positioning pin, and the universal shaft connects the file rod shaft and the fixing portion.

10. A surgical assisting instrument, characterized in that: The invention comprises a power mechanism and the file rod mechanism according to any one of claims 1 to 9, wherein the power mechanism is connected to the file rod mechanism.

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