Acetabulum file connecting rod

Abstract

The acetabular file connecting rod comprises a shaft sleeve, a torsion bar piece is arranged in the shaft sleeve and rotationally connected with the shaft sleeve, a connecting part is arranged at the position, located on the outer side of the shaft sleeve, of one end of the torsion bar piece and used for being connected with an external power driving device, and a connecting assembly used for being connected with an acetabular file is arranged at the end, away from the connecting part, of the torsion bar piece. The connecting assembly comprises a positioning seat and a locking piece installed in a sliding mode. The shaft sleeve provides rotating support for the torsion bar piece, the positioning seat achieves preliminary positioning of the acetabulum file and the torsion bar piece, the locking piece is installed in a sliding mode to lock the acetabulum file and the torsion bar piece, the connecting part is connected with an external power driving device, efficient power transmission is achieved, and it is guaranteed that the acetabulum file is always kept in a stable state in the grinding process; the acetabulum grinding device has the advantages that the acetabulum grinding efficiency is guaranteed, and the dual requirements of an operation for accuracy and efficiency are met.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a acetabular reamer connecting rod. BACKGROUND

[0002] In the field of medical devices, hip joint surgery is a common and important surgical procedure, and acetabular reaming is one of the key steps, the accuracy and efficiency of which directly affect the effectiveness of hip replacement surgery and the recovery of patients.

[0003] As the main tool for acetabular reaming, the design and performance of the acetabular reamer directly affect the accuracy and efficiency of the operation. In the past hip joint surgery, in order to realize the power transmission and operation of the acetabular reamer, an integrated connecting rod structure is usually used. This connecting rod structure is relatively fixed and difficult to adjust flexibly according to the actual position of the acetabulum and the operation space requirements in hip joint surgery. Some connecting rod structures have certain adjustability, but the adjustment method is complex and inconvenient to operate, and deviations and losses are prone to occur during power transmission, resulting in poor stability of the acetabular reamer during reaming. The traditional acetabular reamer has low flexibility, is not firmly connected, and is prone to looseness, which affects the accuracy of the operation. SUMMARY

[0004] In order to solve the problem of low flexibility of the acetabular reamer, the present application provides an acetabular reamer connecting rod.

[0005] The acetabular reamer connecting rod provided by the present application adopts the following technical solution: An acetabular reamer connecting rod, comprising a shaft sleeve, a torsion bar piece is arranged in the shaft sleeve, the torsion bar piece is rotationally connected with the shaft sleeve, a connecting part is arranged at one end of the torsion bar piece and outside the shaft sleeve, the connecting part is used for connecting with an external power driving device, a connecting assembly is arranged at the end of the torsion bar piece away from the connecting part, the connecting assembly comprises a positioning seat used for connecting with the acetabular reamer and a slidingly installed locking piece, and the locking piece is used for locking the positioning seat.

[0006] By adopting the above technical solution, the shaft sleeve provides rotational support for the torsion bar piece, the positioning seat realizes the preliminary positioning of the acetabular reamer and the torsion bar piece, the slidingly installed locking piece locks the acetabular reamer and the torsion bar piece, the connection of the connecting part and the external power driving device realizes efficient power transmission, ensures that the acetabular reamer always maintains a stable state during reaming, guarantees the efficiency of acetabular reaming, and meets the dual requirements of accuracy and efficiency of the operation.

[0007] Optionally, the shaft sleeve is provided with multiple segments connected with each other, and adjacent two shaft sleeves are distributed at a certain angle.

[0008] By adopting the technical scheme, the multi-section and adjacent shaft sleeve structure distributed at a certain angle can be adjusted according to the actual position of the acetabulum and the operation space requirement in the hip joint surgery, so that the acetabulum can be more conveniently extended into the target polishing area, and the flexibility of the acetabulum connecting rod is greatly improved.

[0009] Optionally, the torsion bar member comprises a plurality of torsion bars, the torsion bars are coaxially distributed and rotationally connected with the shaft sleeves, and the adjacent two torsion bars are connected through a steering mechanism.

[0010] By adopting the technical scheme, the multi-section and adjacent shaft sleeve structure distributed at a certain angle can be adjusted according to the actual position of the acetabulum and the operation space requirement in the hip joint surgery, so that the acetabulum can be more conveniently extended into the target polishing area, and the flexibility of the acetabulum connecting rod is greatly improved.

[0011] Optionally, the steering mechanism comprises a universal joint, the universal joint comprises a driving fork, a driven fork and a cross shaft, one end of the driving fork is arranged at one end of the torsion bar of the previous section, the opposite sides of the cross shaft are rotationally connected with the driving fork, one end of the driven fork is arranged at one end of the torsion bar of the next section, and the remaining two sides of the cross shaft are rotationally connected with the driven fork.

[0012] By adopting the technical scheme, when the torsion bar of the previous section is rotated, the cross shaft is rotated through the driving fork, the driven fork is rotated through the cross shaft, and then the torsion bar of the next section is rotated, so that the power is uniformly transmitted between the adjacent torsion bars, and the deviation and loss of power transmission are reduced.

[0013] Optionally, one end of the torsion bar away from the connecting part is provided with a positioning seat, a disc groove for positioning and inserting with a positioning part of the acetabulum is arranged on the positioning seat, and the positioning part is rotationally connected through the disc groove.

[0014] By adopting the technical scheme, the disc groove on the positioning seat and the positioning part of the acetabulum are positioned and inserted to quickly realize the preliminary positioning of the acetabulum and the torsion bar, so that the acetabulum can be accurately aligned with the torsion bar during installation, and the polishing position deviation of the acetabulum caused by misalignment during installation is reduced.

[0015] Optionally, a protruding part is arranged on one side of the disc groove on the positioning seat, a clamping plate is arranged on one side of the protruding part, and the clamping plate is used for clamping connection with a limiting groove of the positioning part.

[0016] By adopting the technical scheme, the clamping connection of the clamping plate on the protruding portion and the limiting groove of the positioning portion further locks the circumferential position of the acetabulum cup on the basis of the preliminary positioning of the disc groove, prevents the circumferential sliding or rotational deviation of the acetabulum cup relative to the torsion rod during the rotating and polishing process, and further enhances the firmness of the connection between the acetabulum cup and the torsion rod.

[0017] Optionally, the locking member comprises a positioning sleeve slidably installed on the outer side of the torsion rod, one side of the positioning sleeve is provided with a positioning pin, the positioning seat is provided with a positioning hole through which one end of the positioning pin passes, and the shaft sleeve is provided with an elastic member for sliding the positioning sleeve.

[0018] By adopting the technical scheme, the positioning sleeve drives the positioning pin to pass through the positioning hole in the positioning seat under the pushing action of the elastic member, the positioning sleeve and the positioning seat are accurately locked, the acetabulum cup is stably fixed on the torsion rod, and the locking reliability of the locking member is improved. When the acetabulum cup is disassembled, the positioning pin is separated from the positioning hole by reversely pushing the positioning sleeve, which is convenient to operate and does not affect the operation efficiency.

[0019] Optionally, the elastic member comprises a retaining sleeve and a spring, the retaining sleeve is coaxially connected with the torsion rod, the spring is sleeved on the torsion rod, one end of the spring is connected with the retaining sleeve, and the other end of the spring away from the retaining sleeve is connected with the positioning sleeve.

[0020] By adopting the technical scheme, the spring generates a continuous pushing force on the positioning sleeve through its elastic deformation, so that the positioning sleeve drives the positioning pin to always maintain close cooperation with the positioning hole. The elastic pushing force is stable and controllable, which guarantees the locking effect of the locking member, prevents the acetabulum cup from loosening, and avoids damage to the positioning pin or the positioning hole due to excessive pushing force.

[0021] Optionally, the two adjacent shaft sleeves are connected by laser wire filling welding, and the shaft sleeve connection is provided with a sealing ring for sealing.

[0022] By adopting the technical scheme, the laser wire filling welding has high welding strength and good welding quality, which ensures firm connection between the adjacent shaft sleeves, reduces the problems of loosening and fracture of the connection due to stress or vibration of the shaft sleeve during the operation process, and guarantees the stability of the overall structure of the shaft sleeve.

[0023] Optionally, the end of the shaft sleeve is provided with a retaining ring coaxially rotating with the shaft sleeve, and the torsion rod is connected with the retaining ring.

[0024] By adopting the technical scheme, the coaxial rotation of the retaining ring and the shaft sleeve reduces the friction loss between the torsion rod and the end of the shaft sleeve, avoids wear of the torsion rod or the shaft sleeve due to friction, and prolongs the service life of the components.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The shaft sleeve provides rotational support for the torsion bar, the positioning seat realizes the preliminary positioning of the acetabulum reamer and the torsion bar, the sliding installation locking piece locks the acetabulum reamer and the torsion bar, the connecting part is connected with the external power driving device to realize efficient power transmission, ensure that the acetabulum reamer always maintains a stable state during polishing, improve the efficiency of acetabulum polishing, and meet the dual requirements of accuracy and efficiency in surgery; 2. The multi-section shaft sleeve structure is distributed at a certain angle, which can adjust the overall direction of the shaft sleeve according to the actual position of the acetabulum in the hip joint surgery and the operation space requirement, so that the acetabulum reamer can be more conveniently extended into the target polishing area, and the flexibility of the acetabulum reamer connecting rod is greatly improved; 3. The multi-section torsion bar is coaxially distributed and rotationally connected with the corresponding shaft sleeve, the steering mechanism between the adjacent torsion bars realizes the angle adjustment of the torsion bar, so that the multi-section torsion bar can be synchronously adapted to steering according to the angle distribution of the multi-section shaft sleeve, the power can be stably transmitted between the segmented torsion bars, and the flexibility and power transmission stability of the acetabulum reamer connecting rod are improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 is a schematic view of the three-dimensional structure of the present application.

[0027] Figure 2 is a sectional view of the present application along the axial direction of the shaft sleeve.

[0028] Figure 3 is a schematic view of the three-dimensional structure of the present application with the shaft sleeve located at one end of the locking piece.

[0029] Figure 4 is an enlarged sectional view of part A of the present application.

[0030] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and have not necessarily been drawn to scale. For example, the dimensions and / or relative positioning of some of the elements in the drawings are exaggerated relative to other elements to help to improve understanding of the present application.

[0031] Reference signs: 1, shaft sleeve; 11, sealing ring; 2, retaining ring; 3, positioning sleeve; 31, positioning pin; 4, torsion bar; 41, connecting part; 42, positioning seat; 421, disc groove; 422, protruding part; 423, clamping plate; 424, positioning hole; 5, universal joint; 6, elastic member; 61, retaining sleeve; 62, spring. DETAILED DESCRIPTION

[0032] The present application will be further described in detail below with reference to the accompanying drawings.

[0033] The present application discloses an acetabulum reamer connecting rod, referring to Figure 1 and Figure 2It includes a bushing 1 and a torsion bar. The bushing 1 provides rotational support for the torsion bar, which rotates within the bushing 1. The two are rotatably connected. One end of the torsion bar is provided with a connecting part 41 for connecting to an external power drive device, and the other end is provided with a connecting component for connecting to the acetabular joint. This achieves efficient power transmission and stable connection of the acetabular joint, ensuring the efficiency and accuracy of acetabular grinding.

[0034] Reference Figure 1 and Figure 2 The bushing 1 comprises multiple interconnected segments, with adjacent bushings 1 positioned at a certain angle. The bushing 1 has a hollow tubular structure to accommodate the torsion bar. Adjacent bushings 1 are connected by laser-guided wire welding. This welding method provides high weld strength and good weld quality, ensuring a secure connection between adjacent bushings 1 and reducing the risk of loosening or breakage at the connection point due to stress or vibration during surgery.

[0035] Reference Figure 1 and Figure 2 The bushing 1 connection is also equipped with a sealing ring 11 for sealing, which can prevent foreign objects from entering the bushing 1 and affecting the rotation of the torsion bar. The end of the bushing 1 is provided with a retaining ring 2 that rotates coaxially with the bushing 1. The retaining ring 2 is usually made of wear-resistant material. The retaining ring 2 and the bushing 1 are coaxially rotated through a bearing. The torsion bar is connected to the retaining ring 2. The rotational connection reduces frictional loss between the torsion bar and the end of the bushing 1 and extends the service life of the component.

[0036] Reference Figure 1 and Figure 2 The torsion bar component includes multiple torsion bar sections 4, which are coaxially distributed and rotatably connected to each section of bushing 1. The torsion bar 4 is a slender rod shape. Each torsion bar section 4 can rotate stably within its corresponding bushing 1, and adjacent torsion bars 4 are connected by a steering mechanism. The steering mechanism includes a universal joint 5, which comprises a driving fork, a driven fork, and a cross shaft. The driving fork is located at one end of the preceding torsion bar section 4 and is connected to it by welding or integral molding. The opposite sides of the cross shaft are rotatably connected to the driving fork via pins. The driven fork is located at one end of the following torsion bar section 4 and is also connected by welding or integral molding. The remaining two sides of the cross shaft are rotatably connected to the driven fork via pins. When the preceding torsion bar section 4 is rotated, the driving fork drives the cross shaft to rotate, which in turn drives the driven fork to rotate, thereby driving the following torsion bar section 4 to rotate. This achieves uniform power transmission between adjacent torsion bars 4, reducing power transmission deviation and loss.

[0037] Reference Figure 2 and Figure 3The connecting assembly includes a positioning seat 42 and a sliding locking member. The positioning seat 42 is located at the end of the torsion bar 4 away from the connecting part 41, and the positioning seat 42 and the torsion bar 4 are integrally formed. The positioning seat 42 is provided with a disc groove 421 for positioning and inserting with the positioning part of the acetabular file. The shape of the disc groove 421 is adapted to the shape of the positioning part of the acetabular file, and is a circular groove. The positioning part is rotatably connected to the torsion bar 4 through the disc groove 421, which quickly realizes the initial positioning of the acetabular file and the torsion bar 4, ensuring that the acetabular file can be accurately aligned with the torsion bar 4 during installation, and reducing the deviation of the grinding position of the acetabular file due to installation misalignment.

[0038] Reference Figure 3 and Figure 4 A protrusion 422 is provided on the positioning seat 42 and on one side of the disc groove 421. A retaining plate 423 is provided on one side of the protrusion 422. The retaining plate 423 is used to engage with the limiting groove of the positioning part. Based on the initial positioning of the disc groove 421, the circumferential position of the acetabular file is further locked to prevent the acetabular file from sliding or rotating relative to the torsion bar 4 during the rotation grinding process, and further enhances the firmness of the connection between the acetabular file and the torsion bar 4.

[0039] Reference Figure 3 and Figure 4 The locking component includes a positioning sleeve 3 that slides on the outside of the torsion bar 4. The positioning sleeve 3 is generally made of metal and is ring-shaped, sliding along the axial direction of the torsion bar 4. A positioning pin 31 is provided on one side of the positioning sleeve 3. The positioning pin 31 is integrally formed with the positioning sleeve 3. The positioning seat 42 is provided with a positioning hole 424 for one end of the positioning pin 31 to pass through. An elastic element 6 is provided on the bushing 1. The elastic element 6 includes a retaining sleeve 61 and a spring 62. The retaining sleeve 61 is coaxially fixedly connected to the torsion bar 4. The spring 62 is sleeved on the torsion bar 4. One end of the spring 62 is connected to the retaining sleeve 61, and the end of the spring 62 away from the retaining sleeve 61 is connected to the positioning sleeve 3. Spring 62 generates a continuous thrust through its elastic deformation, acting on the positioning sleeve 3. This ensures that the positioning sleeve 3, along with the positioning pin 31, maintains a tight fit with the positioning hole 424. This elastic thrust is stable and controllable, guaranteeing the locking effect of the locking components, preventing the acetabular joint from loosening, and avoiding damage to the positioning pin 31 or the positioning hole 424 due to excessive thrust. When disassembling the acetabular joint, the positioning pin 31 is disengaged from the positioning hole 424 by pushing the positioning sleeve 3 in the reverse direction. This operation is convenient and does not affect surgical efficiency.

[0040] The implementation principle of the acetabular contusion linkage in this application embodiment is as follows: During hip joint surgery, the doctor adjusts the overall orientation of the bushing 1 according to the actual position of the acetabulum and the surgical operation space requirements.

[0041] The external power drive device drives the torsion bar 4 to rotate through the connecting part 41. When the first section of the torsion bar 4 rotates, the driving fork drives the cross shaft to rotate, and the cross shaft drives the driven fork to rotate, which in turn drives the second section of the torsion bar 4 to rotate, thus realizing the transmission of power between the segmented torsion bars 4 to the acetabulum.

[0042] During installation of the acetabular clip, the positioning part of the acetabular clip is first inserted into the disc groove 421 on the positioning seat 42 to achieve initial positioning of the acetabular clip and the torsion bar 4. Then, the locking plate 423 engages with the limiting groove of the positioning part to further lock the position of the acetabular clip in the circumferential direction. The spring 62 pushes on the positioning sleeve 3, causing the positioning sleeve 3 to drive the positioning pin 31 through the positioning hole 424 on the positioning seat 42, precisely locking the positioning sleeve 3 and the positioning seat 42, thereby stably fixing the acetabular clip on the torsion bar 4. When it is necessary to remove the acetabular clip, simply push the positioning sleeve 3 in the opposite direction to disengage the positioning pin 31 from the positioning hole 424. The operation is simple and quick and will not affect the efficiency of the operation.

[0043] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. An acetabular file connecting rod, comprising a bushing (1), wherein a torsion bar is disposed within the bushing (1), characterized in that: The torsion bar is rotatably connected to the bushing (1). One end of the torsion bar and located outside the bushing (1) is provided with a connecting part (41). The connecting part (41) is used to connect with an external power drive device. One end of the torsion bar away from the connecting part (41) is provided with a connecting assembly. The connecting assembly includes a positioning seat (42) for connecting with the acetabular joint and a sliding locking member. The locking member is used to lock the positioning seat (42).

2. The acetabular impaction linkage according to claim 1, characterized in that: The bushing (1) is provided with multiple segments that are connected to each other, and the two adjacent bushings (1) are distributed at a certain angle.

3. The acetabular impaction linkage according to claim 1, characterized in that: The torsion bar includes multiple torsion bars (4), which are coaxially distributed and rotatably connected to each of the bushings (1). Adjacent torsion bars (4) are connected by a steering mechanism.

4. The acetabular impaction linkage according to claim 3, characterized in that: The steering mechanism includes a universal joint (5), which includes an active fork, a driven fork, and a cross shaft. The active fork is located at one end of the torsion bar (4) in the first section, and the opposite sides of the cross shaft are rotatably connected to the active fork. The driven fork is located at one end of the torsion bar (4) in the second section, and the remaining two sides of the cross shaft are rotatably connected to the driven fork.

5. The acetabular impaction linkage according to claim 3, characterized in that: The torsion bar (4) is provided with a positioning seat (42) at one end away from the connecting part (41). The positioning seat (42) is provided with a disc groove (421) for positioning and inserting with the positioning part of the acetabular joint. The positioning part is rotatably connected to the disc groove (421).

6. The acetabular impaction linkage according to claim 5, characterized in that: A protrusion (422) is provided on the positioning seat (42) and on one side of the disc groove (421). A retaining plate (423) is provided on one side of the protrusion (422). The retaining plate (423) is used to engage with the limiting groove of the positioning part.

7. The acetabular file connecting rod according to claim 6, characterized in that: The locking component includes a positioning sleeve (3) that is slidably mounted on the outside of the torsion bar (4). A positioning pin (31) is provided on one side of the positioning sleeve (3). A positioning hole (424) is provided on the positioning seat (42) for one end of the positioning pin (31) to pass through. An elastic element (6) for pushing the positioning sleeve (3) to slide is provided on the bushing (1).

8. The acetabular impaction linkage according to claim 7, characterized in that: The elastic element (6) includes a retaining sleeve (61) and a spring (62). The retaining sleeve (61) is coaxially connected to the torsion bar (4). The spring (62) is sleeved on the torsion bar (4). One end of the spring (62) is connected to the retaining sleeve (61), and the end of the spring (62) away from the retaining sleeve (61) is connected to the positioning sleeve (3).

9. The acetabular impaction linkage according to claim 1, characterized in that: The two adjacent bushings (1) are connected by laser filler wire welding, and a sealing ring (11) is provided at the connection of the bushings (1).

10. The acetabular impaction linkage according to claim 1, characterized in that: The end of the bushing (1) is provided with a retaining ring (2) that rotates coaxially with the bushing (1), and the torsion bar (4) is connected to the retaining ring (2).

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