Able to hold various femoral stem bends

Abstract

The present invention discloses a femoral stem bending adjustment device that can hold a variety of femoral stem bending shapes, and belongs to the technical field of medical devices. The present invention includes a bending body and a positioning mechanism, the positioning mechanism is installed on one side of the bending body, the positioning mechanism includes a limit support plate, a positioning pin, a pull rod and a spring, the limit support plate and the bending body are integrally formed, a positioning pin is movably installed on one side of the bending body through a snap, a pull rod is movably installed on one side of the bending body, the pull rod passes through the bending body and passes through the inside of the limit support plate, the positioning pin is located above the pull rod, the positioning pin and the pull rod are fixedly installed with a spring at one end close to the bending body, the spring is located inside the bending body, the shape of the middle part of the bending body is arc-shaped, and the arc-shaped structure is designed in accordance with ergonomics. The present invention effectively avoids the loosening of the femoral stem prosthesis during implantation, the implantation effect is better, and the risk of surgical failure is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of medical devices, in particular to an impact adjuster capable of holding a variety of femoral stem bends. Background Art

[0002] Surgical implant hip replacement refers to a surgery that uses a femoral stem impactor tool to knock the femoral stem into the human femoral medullary cavity, so that the femoral stem prosthesis replaces the human femur. Compared with today, early medical staff did not need to consider fat issues too much during surgery, and the surgery was less difficult.

[0003] In the existing femoral stem impactor technology, when the femoral stem impactor clamps the femoral stem prosthesis, it is usually fixed by threaded connection or clamping. The threaded connection wastes time. When clamping, it is necessary to consider whether the clamping piece is compatible with the hole groove opened on the femoral stem prosthesis, which has poor applicability. In addition, each prosthesis needs to be used with an impactor corresponding to the shape, so when using prostheses of different specifications, it is necessary to replace impactors of different shapes. Before each operation, medical staff need to check in advance whether the tools they carry meet the surgical requirements, which increases the surgical preparation time. If the medical staff is not fully prepared, the amount of intraoperative bleeding will increase. Medical staff use a straight rod femoral stem impactor and use a hammer to knock the tail of the femoral stem impactor to implant the femoral stem artificial prosthesis into the human femoral medullary cavity. However, the rod-shaped femoral stem impactor cannot adapt to ergonomics. Especially when the femoral stem is installed in obese patients, the femoral stem cannot be completely straightened and is directly implanted and knocked vertically downward, resulting in the patient's prosthesis not being installed in place. Summary of the invention

[0004] The object of the present invention is to provide a driving adjuster capable of supporting a variety of femoral stem bends, so as to solve the problems raised in the above-mentioned background technology.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: comprising a curved body and a positioning mechanism, wherein the positioning mechanism is installed on one side of the curved body, the positioning mechanism comprises a limit support plate, a positioning pin, a pull rod and a spring, the limit support plate and the curved body are integrally formed, a positioning pin is movably installed on one side of the curved body through a snap buckle, a pull rod is movably installed on one side of the curved body, the pull rod passes through the curved body and passes through the inside of the limit support plate, the positioning pin is located above the pull rod, a spring is fixedly installed on one end of the positioning pin and the pull rod close to the curved body, the spring is located inside the curved body, the shape of the middle part of the curved body is arc-shaped, and the arc-shaped arrangement conforms to the ergonomic structural design, which is used to ensure that the impactor avoids subcutaneous fat of the human body when entering the human tissue during surgery, The prosthesis is easier to install and the impactor is prevented from causing damage to human tissue. The positioning mechanism is used to position, clamp and fix prostheses of different specifications during surgery. The limiting support plate is used to expand outward when the pull rod moves toward the side of the curved body, and contact with the inner wall of the clamping and fixing groove to lock the prosthesis. When the limiting support plate merges inward, it separates from the inner wall of the clamping and fixing groove to release the prosthesis. The positioning pin is used to position prostheses of different specifications during surgery and drive the prosthesis to rotate during surgery. The pull rod is used to perform telescopic movement under the action of the spring and the second stainless steel rope. The spring is used to buffer the force exerted directly on the positioning pin and the pull rod by the first stainless steel rope and the second stainless steel rope, so as to avoid damage to the first stainless steel rope and the second stainless steel rope due to excessive force at a certain moment.

[0006] Furthermore, a plurality of pins and a pin shaft are fixedly installed inside the curved body, and a first cam and a second cam are rotatably installed on the outer side of the pin shaft. The pins are used to support the first stainless steel rope and the second stainless steel rope, and to guide the first stainless steel rope and the second stainless steel rope to the position of the pin shaft. The pin shaft is used to install the first cam and the second cam. The first cam is used to pull the first stainless steel rope to expand and contract when rotating, so as to achieve the extension and retraction of the locking positioning pin. The second cam is used to pull the second stainless steel rope to expand and contract when rotating, and then pull the pull rod to act on the limiting support plate to lock the prosthesis.

[0007] Furthermore, the positioning pin and the pull rod are respectively fixedly installed with a first stainless steel rope and a second stainless steel rope at one end close to the curved body, the first stainless steel rope and the second stainless steel rope are respectively fixedly installed with one end close to the positioning mechanism inside the spring, and the spring is fixedly installed on the first stainless steel rope and the second stainless steel rope at one end away from the positioning mechanism. The first stainless steel rope and the second stainless steel rope are respectively led to the first cam and the second cam through pins, and the first stainless steel rope is used to pull the positioning pin to extend and retract, and the second stainless steel rope is used to pull the pull rod to extend and retract.

[0008] Furthermore, a limiting hole is opened on one side of the first cam and the second cam, and one end of the first stainless steel rope and the second stainless steel rope away from the positioning mechanism passes through the limiting hole. The limiting hole is used to allow the first stainless steel rope and the second stainless steel rope to pass through the inside of the first cam and the second cam respectively. When the first cam or the second cam is rotated, the first stainless steel rope or the second stainless steel rope is locked, thereby locking the state of the positioning pin or the pull rod.

[0009] Furthermore, the adjuster also includes a handle and a femoral stem prosthesis, the handle being installed at one end of the curved body away from the positioning mechanism, the handle being integrally formed with the curved body, a first tension knob and a second tension knob being rotatably installed on the inner side of the handle, the first tension knob being located on the left side of the second tension knob, a through hole being provided on one side of the handle, and the shape of the handle being set to be elliptical, so that medical staff can take it during surgery, the first tension knob being used to adjust the tightness of the first stainless steel rope during rotation, the second tension knob being used to adjust the tightness of the second stainless steel rope during rotation, and the through hole being used to allow the first stainless steel rope and the second stainless steel rope to pass through.

[0010] Furthermore, one end of the first stainless steel rope near the limiting hole passes through the through hole and the inner cavity of the second tension knob and is fixed in the inner cavity of the first tension knob, and one end of the second stainless steel rope near the limiting hole passes through the through hole and is fixed in the inner cavity of the second tension knob.

[0011] Furthermore, the handle, the positioning mechanism and the two ends of the curved body are located on the same central axis, which is used to ensure that the rotation amplitude of the handle and the positioning mechanism remain consistent when the handle is rotated, thereby avoiding torque generated when the prosthesis is implanted in the femoral medullary cavity and reducing the accuracy of prosthesis implantation.

[0012] Furthermore, the femoral stem prosthesis is provided with a clamping and fixing groove and a limiting groove. The limiting groove is arranged at the edge of the clamping and fixing groove. The clamping and fixing groove is used to allow the limiting support plate and the pull rod to enter. The prosthesis is fixed by adjusting the positioning mechanism. The limiting groove is used to allow the positioning pin to be stuck in the limiting groove when it is extended and retracted outward, so as to facilitate the positioning of the prosthesis during surgery.

[0013] Furthermore, the cross-sectional diameter of the limiting support plate is smaller than the inner diameter of the clamping and fixing groove, and the long diameter of the cross-sectional area of ​​the positioning pin is smaller than the minimum inner diameter of the limiting groove. The cross-sectional diameter of the limiting support plate is set to be smaller than the inner diameter of the clamping and fixing groove, so as to ensure that the pull rod and the limiting support plate can freely enter the interior of the clamping and fixing groove together, thereby realizing locking of prostheses of different specifications. The long diameter of the cross-sectional area of ​​the positioning pin is set to be smaller than the minimum inner diameter of the limiting groove, so as to realize positioning of prostheses of different specifications during surgery.

[0014] Furthermore, a baffle is provided at the end of the handle, and the cross-sectional diameter of the baffle is larger than the cross-sectional diameter of the bone hammer. The baffle is used to prevent the handle from slipping due to insufficient friction between the hand and the handle surface during surgery, thereby affecting the accuracy of the surgery, and to enable the bone hammer to directly act on the baffle surface to compact the prosthesis inside the femoral medullary cavity.

[0015] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0016] 1. The present invention adds a limiting support plate, a positioning pin, a pull rod, a first stainless steel rope and a second stainless steel rope. The positioning pin is pulled by the first stainless steel rope to fix the femoral stem prosthesis laterally, and the pull rod is pulled by the second stainless steel rope to push the limiting support plate to contact the inner wall of the clamping and fixing groove, thereby fixing the femoral stem prosthesis longitudinally, avoiding loosening of the femoral stem prosthesis during implantation, achieving a better implantation effect and reducing the risk of surgical failure.

[0017] 2. The present invention adds a positioning pin, a limiting groove, a first stainless steel rope and a first cam, and fine-tunes the length of the first stainless steel rope by turning the first cam. The first stainless steel rope drives the positioning pin to enter the inner cavity of the limiting groove to fix the femoral stem prosthesis. When the femoral stem prosthesis needs to be knocked, since the bone in the femoral medullary cavity is relatively soft, the pull rod and the limiting support plate need to be separated from the clamping limiting groove. At this time, the positioning pin fixes the femoral stem prosthesis to ensure that the implantation direction of the femoral stem prosthesis will not change and the femoral medullary cavity will not be damaged during the knocking process. The present invention is suitable for femoral stem prostheses of different specifications and has strong applicability. There is no need to change tools during surgery, which saves operation time and reduces intraoperative bleeding.

[0018] 3. The present invention adds a curved main body. The "curved" structure of the curved main body conforms to ergonomic design and can avoid the subcutaneous fat of human tissue. The handle, the positioning mechanism and the two ends of the curved main body are located on the same central axis. When the handle is rotated to adjust the femoral stem prosthesis, the movement trajectories of the positioning mechanism and the handle are ensured to remain consistent, so that the femoral stem prosthesis is in a straightened state when it is knocked downward, avoiding improper installation of the patient's prosthesis and further increasing the success rate of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a schematic diagram of the overall structure of the impact adjuster capable of supporting various femoral stem bends of the present invention;

[0021] Figure 2 It is a schematic diagram of the main structure of the impact adjuster capable of supporting various femoral stem bends of the present invention;

[0022] Figure 3 It is a top view of the structure of the adjusting device capable of supporting various femoral stem bends of the present invention;

[0023] Figure 4 It is a side view structural schematic diagram of the impact adjuster capable of holding various femoral stem bends of the present invention;

[0024] Figure 5 The present invention is a kind of adjusting device capable of supporting various femoral stem bending types. Figure 1 The enlarged structural diagram at A in the middle;

[0025] Figure 6 The present invention is a kind of adjusting device capable of supporting various femoral stem bending types. Figure 2 Enlarged structural diagram at B in the middle.

[0026] In the figure: 1. handle; 11. first tension knob; 12. second tension knob; 13. through hole; 14. baffle; 2. curved body; 21. pin; 22. pin shaft; 23. first cam; 24. second cam; 25. limit hole; 3. positioning mechanism; 31. limit support plate; 32. positioning pin; 33. pull rod; 34. spring; 4. first stainless steel rope; 5. second stainless steel rope; 6. femoral stem prosthesis; 61. clamping and fixing groove; 62. limit groove. DETAILED DESCRIPTION

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

[0028] See also Figure 1-6The present invention provides a technical solution: it includes a curved body 2 and a positioning mechanism 3, the positioning mechanism 3 is installed on one side of the curved body 2, the shape of the middle part of the curved body 2 is an arc, and the arc shape is set to be ergonomically designed to ensure that the impactor avoids the subcutaneous fat of the human body when entering the human tissue during surgery, so that the prosthesis is easier to install in place, and it also prevents the impactor from causing damage to the human tissue. The positioning mechanism 3 is used to position, clamp and fix prostheses of different specifications during surgery. The positioning mechanism 3 includes a limiting support plate 31, a positioning pin 32, a pull rod 33 and a spring 34. The limiting support plate 31 is integrally formed with the curved body 2. The limiting support plate 31 is used to expand outward when the pull rod 33 moves toward one side of the curved body 2, and contact with the inner wall of the clamping and fixing groove 61 to lock the prosthesis. When the limiting support plate 31 merges inward, it separates from the inner wall of the clamping and fixing groove 61 to release the prosthesis. One side of the curved body 2 is clamped The buckle is movably installed with a positioning pin 32, which is used to position prostheses of different specifications during surgery and drive the prosthesis to rotate during surgery. A pull rod 33 is movably installed on one side of the curved body 2, and the pull rod 33 is used to perform telescopic movement under the action of a spring 34 and a second stainless steel rope 5. The pull rod 33 passes through the curved body 2 and passes through the inside of the limiting support plate 31. The positioning pin 32 is located above the pull rod 33. The positioning pin 32 is used to cooperate with the pull rod 33 and the limiting support plate 31 to achieve simultaneous lateral and longitudinal support of the femoral stem prosthesis 6, and the fixing effect is optimal. The positioning pin 32 and the pull rod 33 are fixedly installed with a spring 34 at one end close to the curved body 2, and the spring 34 is located inside the curved body 2. The spring 34 is used to buffer the force exerted directly on the first stainless steel rope 4 and the second stainless steel rope 5 on the positioning pin 32 and the pull rod 33, so as to avoid damage to the first stainless steel rope 4 and the second stainless steel rope 5 due to excessive force at a certain moment.

[0029] A plurality of pins 21 and a pin shaft 22 are fixedly installed inside the curved main body 2, the pin 21 is used to support the first stainless steel rope 4 and the second stainless steel rope 5, and to guide the first stainless steel rope 4 and the second stainless steel rope 5 to the position of the pin shaft 22, the pin shaft 22 is used to install the first cam 23 and the second cam 24, the first cam 23 and the second cam 24 are rotatably installed on the outer side of the pin shaft 22, the first cam 23 is used to pull the first stainless steel rope 4 to scale when rotating, so as to realize the extension and retraction of the locking positioning pin 32, the second cam 24 is used to pull the second stainless steel rope 5 to scale when rotating, and then pull the pull rod 33 to act on the limiting support plate 31 to lock the prosthesis.

[0030] The first stainless steel rope 4 and the second stainless steel rope 5 are fixedly installed on one end of the positioning pin 32 and the pull rod 33 close to the curved body 2, respectively. The first stainless steel rope 4 is used to pull the positioning pin 32 to extend and retract, and the second stainless steel rope 5 is used to pull the pull rod 33 to extend and retract. One end of the first stainless steel rope 4 and the second stainless steel rope 5 close to the positioning mechanism 3 is located inside the spring 34, and one end of the spring 34 away from the positioning mechanism 3 is fixedly installed on the first stainless steel rope 4 and the second stainless steel rope 5. The first stainless steel rope 4 and the second stainless steel rope 5 are respectively led to the first cam 23 and the second cam 24 through the pin 21.

[0031] A limiting hole 25 is provided on one side of the first cam 23 and the second cam 24, and one end of the first stainless steel rope 4 and the second stainless steel rope 5 away from the positioning mechanism 3 passes through the limiting hole 25. The limiting hole 25 is used to allow the first stainless steel rope 4 and the second stainless steel rope 5 to pass through the inside of the first cam 23 and the second cam 24 respectively. When the first cam 23 or the second cam 24 is rotated, the first stainless steel rope 4 or the second stainless steel rope 5 is locked, thereby locking the state of the positioning pin 32 or the pull rod 33.

[0032] The adjuster also includes a handle 1 and a femoral stem prosthesis 6. The shape of the handle 1 is set to be elliptical, which is convenient for medical staff to pick up during surgery. The handle 1 is installed at the end of the curved body 2 away from the positioning mechanism 3. The handle 1 and the curved body 2 are integrally formed. The first tension knob 11 and the second tension knob 12 are rotatably installed on the inner side of the handle 1. The first tension knob 11 is located on the left side of the second tension knob 12. The first tension knob 11 is used to adjust the tightness of the first stainless steel rope 4 during rotation, and the second tension knob 12 is used to adjust the tightness of the second stainless steel rope 5 during rotation. A through hole 13 is opened on one side of the handle 1, and the through hole 13 is used to allow the first stainless steel rope 4 and the second stainless steel rope 5 to pass through.

[0033] One end of the first stainless steel rope 4 near the limiting hole 25 passes through the through hole 13 and the inner cavity of the second tension knob 12 and is fixed in the inner cavity of the first tension knob 11 . One end of the second stainless steel rope 5 near the limiting hole 25 passes through the through hole 13 and is fixed in the inner cavity of the second tension knob 12 .

[0034] The handle 1, the positioning mechanism 3 and the two ends of the curved body 2 are located on the same central axis. The handle 1, the positioning mechanism 3 and the two ends of the curved body 2 are located on the same central axis, which is used to ensure that the rotation amplitude of the handle 1 and the positioning mechanism 3 remain consistent when the handle 1 is rotated, thereby avoiding torque generated when the prosthesis is implanted into the femoral medullary cavity and reducing the accuracy of prosthesis implantation.

[0035] The femoral stem prosthesis 6 is provided with a clamping and fixing groove 61 and a limiting groove 62. The clamping and fixing groove 61 is used to allow the limiting support plate 31 and the pull rod 33 to enter. The prosthesis is fixed by adjusting the positioning mechanism 3. The limiting groove 62 is provided at the edge of the clamping and fixing groove 61. The limiting groove 62 is used to be stuck in the limiting groove 62 when the positioning pin 32 is extended and retracted outward, so as to facilitate the positioning of the prosthesis during surgery.

[0036] The cross-sectional diameter of the limiting support plate 31 is smaller than the inner diameter of the clamping and fixing groove 61. The cross-sectional diameter of the limiting support plate 31 is set to be smaller than the inner diameter of the clamping and fixing groove 61 to ensure that the pull rod 33 and the limiting support plate 31 can freely enter the clamping and fixing groove 61 together, thereby achieving locking of prostheses of different specifications. The long diameter of the cross-sectional area of ​​the locating pin 32 is smaller than the minimum inner diameter of the limiting groove 62. The long diameter of the cross-sectional area of ​​the locating pin 32 is set to be smaller than the minimum inner diameter of the limiting groove 62 to achieve positioning of prostheses of different specifications during surgery.

[0037] A baffle 14 is provided at the end of the handle 1. The cross-sectional diameter of the baffle 14 is larger than the cross-sectional diameter of the bone hammer. The baffle 14 is used to prevent the handle 1 from slipping due to insufficient friction between the hand and the surface of the handle 1 during surgery, thereby affecting the accuracy of the surgery. The baffle 14 can also enable the bone hammer to act directly on the surface of the baffle 14 to compact the prosthesis inside the femoral medullary cavity.

[0038] The working principle of the present invention is as follows: when in use, the user inserts the femoral stem prosthesis 6 into the outer side of the limiting support plate 31 through the clamping and fixing groove 61, and then pulls the second cam 24 to fine-tune the length of the second stainless steel rope 5. During the adjustment process, the second stainless steel rope 5 pulls the pull rod 33 to move toward the side where the curved body 2 is located. During the movement, the pull rod 33 enters the interior of the chamber composed of multiple limiting support plates 31, and pushes the limiting support plate 31 to move outward to a position that contacts the inner wall of the clamping and fixing groove 61. Then, the first cam 23 is pulled to fine-tune the length of the first stainless steel rope 4. During the adjustment process, the first stainless steel rope 4 drives the positioning pin 32 to move to the inner cavity of the limiting groove 62 to lock the prosthesis. Then, the first tension knob 11 and the second tension knob 12 are tightened respectively to make the first stainless steel rope 4 and the second stainless steel rope 5 in a taut state. Then, the femoral stem prosthesis 6 is driven into the human tissue through the curved body 2. Due to the "curved" structure of the curved body 2 The structure is that the curved main body 2 avoids the subcutaneous fat of the human body when entering the human tissue during the operation. When the femoral stem prosthesis 6 enters the human tissue, the handle 1 is rotated according to the implantation requirements. Since the handle 1 and the two ends of the positioning mechanism 3 and the curved main body 2 are located on the same central axis, the handle 1, the positioning mechanism 3 and the femoral stem prosthesis 6 maintain consistent movement and no torque is generated. Finally, a bone hammer is used to knock the baffle 14 to compact the femoral stem prosthesis 6 and enter the femoral medullary cavity. When the femoral stem prosthesis 6 is knocked, the pull rod 33 and the limiting support plate 31 are disengaged from the clamping and fixing groove 61 to avoid damage to the femoral medullary cavity. After the femoral stem prosthesis 6 is implanted, the first tension knob 11 and the second tension knob 12 are loosened, and then the first cam 23 and the second cam 24 are pulled. At this time, the first stainless steel rope 4 and the second stainless steel rope 5 are in a relaxed state. The first stainless steel rope 4 and the second stainless steel rope 5 in the relaxed state drive the positioning pin 32 and the pull rod 33 to disengage from the clamping and fixing groove 61 and the limiting groove 62 respectively.

[0039] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0040] Finally, it should be noted that the above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. It can hold various femoral stem bending types, and its features are: The invention comprises a curved body (2) and a positioning mechanism (3), wherein the positioning mechanism (3) is installed on one side of the curved body (2), and the positioning mechanism (3) comprises a limiting support plate (31), a positioning pin (32), a pull rod (33) and a spring (34), wherein the limiting support plate (31) and the curved body (2) are integrally formed, and a positioning pin (32) is movably installed on one side of the curved body (2) through a buckle, and a pull rod (33) is movably installed on one side of the curved body (2), and the pull rod (33) passes through the curved body (2) and passes through the inside of the limiting support plate (31), and the positioning pin (32) is located above the pull rod (33), and a spring (34) is fixedly installed on one end of the positioning pin (32) and the pull rod (33) close to the curved body (2), and the spring (34) is located inside the curved body (2); A plurality of pins (21) and a pin shaft (22) are fixedly mounted inside the curved body (2), and a first cam (23) and a second cam (24) are rotatably mounted outside the pin shaft (22); The first stainless steel rope (4) and the second stainless steel rope (5) are fixedly mounted on one end of the positioning pin (32) and the pull rod (33) close to the curved body (2), respectively; one end of the first stainless steel rope (4) and the second stainless steel rope (5) close to the positioning mechanism (3) is located inside the spring (34); one end of the spring (34) away from the positioning mechanism (3) is fixedly mounted on the first stainless steel rope (4) and the second stainless steel rope (5); the first stainless steel rope (4) and the second stainless steel rope (5) are respectively guided to the first cam (23) and the second cam (24) through the pin (21).

2. The adjusting device capable of holding various femoral stem bends according to claim 1, characterized in that: A limiting hole (25) is formed on one side of the first cam (23) and the second cam (24), and one end of the first stainless steel rope (4) and the second stainless steel rope (5) away from the positioning mechanism (3) passes through the limiting hole (25).

3. The adjusting device capable of holding various femoral stem bends according to claim 2, characterized in that: The adjuster also includes a handle (1) and a femoral stem prosthesis (6), wherein the handle (1) is mounted on an end of the curved body (2) away from the positioning mechanism (3), the handle (1) and the curved body (2) are integrally formed, a first tension knob (11) and a second tension knob (12) are rotatably mounted on the inner side of the handle (1), the first tension knob (11) is located on the left side of the second tension knob (12), and a through hole (13) is opened on one side of the handle (1).

4. The impact adjuster capable of holding various femoral stem bends according to claim 3, characterized in that: One end of the first stainless steel rope (4) near the limiting hole (25) passes through the through hole (13) and the inner cavity of the second tension knob (12), and is fixed in the inner cavity of the first tension knob (11); and one end of the second stainless steel rope (5) near the limiting hole (25) passes through the through hole (13) and is fixed in the inner cavity of the second tension knob (12).

5. The impact adjuster capable of holding various femoral stem bends according to claim 4, characterized in that: The handle (1), the positioning mechanism (3) and the two ends of the curved body (2) are located on the same central axis.

6. The impact adjuster capable of holding various femoral stem bends according to claim 5, characterized in that: The femoral stem prosthesis (6) is provided with a clamping and fixing groove (61) and a limiting groove (62), wherein the limiting groove (62) is provided at the edge of the clamping and fixing groove (61).

7. The impact adjuster capable of holding various femoral stem bends according to claim 6, characterized in that: The cross-sectional diameter of the limiting support plate (31) is smaller than the inner diameter of the clamping and fixing groove (61), and the long diameter of the cross-sectional diameter of the positioning pin (32) is smaller than the minimum inner diameter of the limiting groove (62).

8. The impact adjuster capable of holding various femoral stem bends according to claim 7, characterized in that: A baffle (14) is provided at the end of the handle (1), and the cross-sectional diameter of the baffle (14) is greater than the cross-sectional diameter of the bone hammer.

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