Molding device for femur upward inclination

Abstract

The invention provides a shaping device for femur upward inclination, which belongs to the technical field of unicompartmental knee arthroplasty and comprises a base, a positioning column, a drill rod and a shaping part. The base is provided with a guide hole, and the hole depth direction of the guide hole is used for facing the upper inclined position of the femur. The positioning column is fixedly arranged on the base and used for penetrating into the femoral bone. The drill rod is connected with an electric drill. The shaping piece is fixedly arranged on the drill rod, one end of the shaping piece is used for inclining upwards towards the femur and is provided with a plurality of shaping blades, and the shaping piece is used for penetrating through the guide hole in a sliding mode. According to the shaping device for the thighbone upward inclination, the machining range of the shaping blade can be reasonably set according to actual needs, so that a plane with a proper size is machined at the thighbone upward inclination position, and the problem that the plane formed by osteotomy on the thighbone upward inclination is often large is solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of unicompartmental replacement, and more particularly, relates to a shaping device for femoral superior obliqueness. Background Art

[0002] As one of the effective treatments for knee osteoarthritis, unicompartmental knee replacement has the significant characteristics of less trauma and faster recovery, and can preserve the proprioception of the knee joint to the greatest extent.

[0003] Existing unicompartmental knee replacement surgery requires femoral reshaping, one of the steps being reshaping the superior oblique femur. This reshaping method currently involves using an oscillating saw and an osteotomy guide to perform osteotomy at the superior oblique femur, creating a flat surface. However, the resulting surface is often larger than the desired surface, causing additional trauma to the patient. Summary of the Invention

[0004] The object of the present invention is to provide a shaping device for the superior oblique femur, aiming to solve the problem that the plane formed by osteotomy of the superior oblique femur is often large.

[0005] In order to achieve the above-mentioned purpose, the technical solution adopted by the present invention is: to provide a shaping device for the superior oblique part of the femur, comprising a base, a positioning column, a drill rod and a shaping piece. The base is provided with a guide hole, the depth direction of the guide hole is used to face the superior oblique part of the femur. The positioning column is fixed on the base, and the positioning column is used to penetrate into the femur. The drill rod is used to be connected to an electric drill. The shaping piece is fixed on the drill rod, and one end of the shaping piece is used to face the superior oblique part of the femur and is provided with a plurality of shaping blades, the extension direction of the shaping blades is perpendicular to the length direction of the drill rod, and the shaping piece is used to slide through the guide hole so that the shaping blades can abut against the superior oblique part of the femur.

[0006] In a possible implementation, the base is further provided with a locking hole facing the femur.

[0007] In a possible implementation, the drill rod has an annular portion in a circular ring structure, and the annular portion is sleeved outside the molding.

[0008] In one possible implementation, a chip removal cavity is provided in the molding part, and the chip removal cavity has an open end at one end facing away from the upper oblique part of the femur. The molding part is provided with a chip feed hole connected to the chip removal cavity at each molding blade, and the side wall of the drill rod is provided with a first chip removal hole connected to the open end of the chip removal cavity.

[0009] In a possible implementation, a second chip removal hole is further provided on the side wall of the drill rod, and a chip removal channel is further provided in the drill rod, with both ends of the chip removal channel being connected to the first chip removal hole and the second chip removal hole respectively.

[0010] In one possible implementation, the base has a clamping portion, and a positioning hole is provided on the clamping portion. The shaping device for the superior inclination of the femur also includes a handle, a sliding member, and a positioning ball. The handle has a sleeve channel and a connecting hole connected to the sleeve channel, and the handle can be slidably sleeved on the outside of the clamping portion through the sleeve channel. The sliding member is slidably inserted into the handle, and the sliding member is located on the side of the connecting hole away from the sleeve channel. The sliding member is provided with a receiving groove on the side facing the sleeve channel, and the receiving groove has a first side wall inclined in the direction outside the receiving groove. The positioning ball is rollingly arranged in the connecting hole. The sliding of the sliding member can enable the positioning ball to enter or exit the receiving groove through the first side wall. When the handle is slidably sleeved on the outside of the clamping portion through the sleeve channel and the positioning ball exits the receiving groove, the positioning ball can enter the positioning hole.

[0011] In one possible implementation, a first elongated hole is defined in a sidewall of the handle, the length of the first elongated hole being arranged along the sliding direction of the slider. The device for shaping the femoral superior oblique further comprises a drive sleeve and a fixed post. The drive sleeve is slidably mounted on the outside of the handle along the sliding direction of the slider. The fixed post is movably disposed within the first elongated hole and is fixedly connected to both the drive sleeve and the slider.

[0012] In one possible implementation, a connecting cavity connected to the sleeve channel is provided in the handle, and the connecting cavity is located on one side of the sleeve channel along the sliding direction of the sliding member. A second elongated hole connected to the connecting cavity is provided on the side wall of the handle, and the length direction of the second elongated hole is arranged along the sliding direction of the sliding member. The shaping device for the upper inclination of the femur also includes a driving column and a compression spring. The driving column is movably inserted into the second elongated hole and one section of it is located in the connecting cavity, and the driving column is fixedly connected to the driving sleeve. The compression spring is located in the connecting cavity and between the driving column and the sleeve channel. One end of the compression spring abuts against the driving column, and the other end is connected to the end wall of the connecting cavity facing the sleeve channel. Wherein, when the sliding member slides under the rebound force of the compression spring, the positioning ball exits the accommodating groove through the first side wall.

[0013] In a possible implementation, the base has a distraction portion, and the distraction portion is used to penetrate between the femur and the tibia.

[0014] In one possible implementation, the base is provided with a slideway extending along the length of the positioning column, and the device for shaping the femur upward further includes a thickening member having a sliding portion slidably disposed within the slideway and a thickening portion located on the side of the spreader facing away from the femur.

[0015] In a possible implementation, a positioning groove is provided on the side wall of the slideway, and the sliding portion has a positioning portion protruding outward, and the positioning portion is clamped in the positioning groove.

[0016] In one possible implementation, the sliding portion is provided with a notch, the notch passes through one end of the sliding portion along the sliding direction of the sliding portion, the sliding portion has a long strip portion located on one side of the notch and having a long strip structure, the length direction of the long strip portion is arranged along the sliding direction of the sliding portion, and the positioning portion is located on the side wall of the long strip portion facing away from the notch.

[0017] In the embodiment of the present application, the positioning column is inserted into the femur to position the base, so that the depth direction of the guide hole is toward the upper oblique part of the femur. The drill rod is connected to the electric drill, and the shaping piece is slid through the guide hole, so that the shaping blade is in contact with the upper oblique part of the femur. Since the extension direction of the shaping blade is perpendicular to the length direction of the drill rod, the rotation of the drill rod can enable the shaping blade to cut and process a plane at the upper oblique part of the femur. In this way, the processing range of the shaping blade can be reasonably set according to actual needs, so that a plane of appropriate size can be processed at the upper oblique part of the femur, thereby avoiding the problem that the plane formed by osteotomy at the upper oblique part of the femur is often large. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] 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 or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 A schematic diagram of the first angle structure of the device for shaping the femur superiorly provided by an embodiment of the present invention; Figure 2 for Figure 1 Schematic diagram of the enlarged structure of local A in FIG; Figure 3 A schematic diagram of the second angle structure of the shaping device for superior femoral obliqueness provided by an embodiment of the present invention; Figure 4 A schematic structural diagram of a base in a device for shaping a superiorly inclined femur provided by an embodiment of the present invention; Figure 5for Figure 4 Schematic diagram of the enlarged structure of the local B in FIG; Figure 6 A schematic cross-sectional view of the structure of the drill rod and the shaping member connected in the shaping device for femoral superior obliqueness provided by an embodiment of the present invention; Figure 7 A schematic structural diagram of a thickening member in a shaping device for superior femoral obliqueness provided by an embodiment of the present invention; Figure 8 for Figure 7 Schematic diagram of the enlarged structure of the local C in FIG; Figure 9 A schematic cross-sectional view of the structure of the handle and some parts of the device for shaping the superior oblique femur provided by an embodiment of the present invention after connection; Figure 10 for Figure 9 Schematic diagram of the enlarged structure of the local D in FIG; Figure 11 A schematic structural diagram of the use of the femoral superior oblique shaping device provided by an embodiment of the present invention.

[0020] In the figure: 1. Base; 11. Guide hole; 12. Locking hole; 13. Clamping portion; 14. Positioning hole; 15. Spreading portion; 16. Slideway; 161. Positioning groove; 2. Positioning column; 3. Drill rod; 31. Ring portion; 32. First chip removal hole; 33. Second chip removal hole; 34. Chip removal channel; 4. Molding part; 41. Molding blade; 42. Chip removal chamber; 43. Chip feed hole; 44. Threading hole; 5. Handle; 51. Sleeve channel; 52. Connecting hole 53. First elongated hole; 54. Connecting cavity; 55. Second elongated hole; 6. Sliding member; 61. Accommodating groove; 611. First side wall; 7. Positioning ball; 8. Driving sleeve; 9. Fixing column; 10. Driving column; 110. Compression spring; 120. Thickening member; 1201. Sliding portion; 12011. Notch; 12012. Elongated portion; 12013. Positioning portion; 1202. Thickening portion; 1203. Identification; 130. Femur; 140. Tibia. DETAILED DESCRIPTION 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.

[0021] When an element is referred to as being “fixed to” or “disposed on” another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it can be directly connected to the other element or indirectly connected to the other element.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the technical features being referenced. Therefore, features specified as "first" or "second" may explicitly or implicitly include one or more of such features. In the description of this invention, "plurality" means two or more, and "several" means one or more, unless otherwise specifically defined.

[0023] Please also refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 11 , the shaping device for the upper oblique femur provided by the present invention is now described. The shaping device for the upper oblique femur comprises a base 1, a positioning column 2, a drill rod 3 and a shaping piece 4. The base 1 is provided with a guide hole 11, and the hole depth direction of the guide hole 11 is used to face the upper oblique part of the femur 130. The positioning column 2 is fixed on the base 1, and the positioning column 2 is used to penetrate into the femur 130. The drill rod 3 is used to be connected to an electric drill. The shaping piece 4 is fixed on the drill rod 3, and one end of the shaping piece 4 is used to face the upper oblique part of the femur 130 and is provided with a plurality of shaping blades 41, and the extension direction of the shaping blade 41 is perpendicular to the length direction of the drill rod 3. The shaping piece 4 is used to slide through the guide hole 11 so that the shaping blade 41 can abut against the upper oblique part of the femur 130.

[0024] Compared with the prior art, the shaping device for the upper oblique part of the femur provided by the present invention allows the positioning column 2 to penetrate into the femur 130 to position the base 1, so that the depth direction of the guide hole 11 is toward the upper oblique part of the femur 130. The drill rod 3 is connected to the electric drill, and the shaping part 4 is slid through the guide hole 11, so that the shaping blade 41 abuts against the upper oblique part of the femur 130. Since the extension direction of the shaping blade 41 is perpendicular to the length direction of the drill rod 3, the rotation of the drill rod 3 can enable the shaping blade 41 to cut and process a plane at the upper oblique part of the femur 130. In this way, the processing range of the shaping blade 41 can be reasonably set according to actual needs, so that a plane of appropriate size can be processed at the upper oblique part of the femur 130, thereby avoiding the problem that the plane formed by osteotomy on the upper oblique part of the femur 130 is often large.

[0025] In this embodiment, the positioning column 2 and the base 1 can be integrally formed.

[0026] In some embodiments, the above-mentioned characteristic base 1 can be used as follows Figure 4 The structure shown. Figure 4 The base 1 is further provided with a locking hole 12 facing the femur 130. A fixing pin can be inserted into the locking hole 12 and threaded into the femur 130, thereby maintaining the stability of the base 1 when shaping the upper inclination of the femur 130. The fixing pin is not shown in the drawings.

[0027] In some embodiments, the above-mentioned characteristic drill rod 3 can be used as follows Figure 3 and Figure 6 The structure shown. Figure 3 and Figure 6 The drill rod 3 has a ring-shaped annular portion 31, which is sleeved onto the outer surface of the shaping member 4. Thus, the positioning of the annular portion 31 by the base 1 limits the depth of the shaping blade 41 in the upper oblique portion of the femur 130. In this embodiment, the axis of the annular portion 31 is coaxial with the rotational axis of the drill rod 3.

[0028] In some embodiments, the above-mentioned characteristic molding part 4 can be used as follows Figure 1 、 Figure 2 and Figure 6 The structure shown. Figure 1 、 Figure 2 and Figure 6 The shaping member 4 includes a chip removal cavity 42, with one end of the chip removal cavity 42 facing away from the upper oblique portion of the femur 130 being open. Each shaping blade 41 of the shaping member 4 is provided with a chip feed hole 43 communicating with the chip removal cavity 42. The sidewall of the drill rod 3 is provided with a first chip removal hole 32 communicating with the open end of the chip removal cavity 42. Bone chips removed by the shaping blades 41 can enter the chip removal cavity 42 through the chip feed hole 43 and then be discharged through the open end of the chip removal cavity 42 and the first chip removal hole 32.

[0029] In this embodiment, the chip feed holes 43 can be machined using wire cutting. For example, a threading hole 44 for the cutting wire to pass through and communicate with the chip removal chamber 42 can be machined at the axis of rotation of the shaping member 4. This allows two chip feed holes 43 to be machined simultaneously, communicating with the threading holes 44. If the machining range of the shaping blade 41 does not cover the threading holes 44, a protrusion will be left at the upper oblique portion of the femur 130 corresponding to the threading holes 44. This protrusion can then be removed using a surgical instrument such as a rongeur.

[0030] In some embodiments, the above-mentioned characteristic drill rod 3 can be used as follows Figure 1 and Figure 6 The structure shown. Figure 1 and Figure 6 The sidewall of the drill rod 3 is also provided with a second chip removal hole 33, and a chip removal channel 34 is also provided within the drill rod 3. The ends of the chip removal channel 34 are connected to the first chip removal hole 32 and the second chip removal hole 33, respectively. Bone chips from the open end of the chip removal chamber 42 can also enter the chip removal channel 34 and then be discharged from the second chip removal hole 33. In this embodiment, after the surgery is completed, cleaning water can be injected into the chip removal channel 34 through the second chip removal hole 33, thereby rinsing the drill rod 3 and the molded part 4 after the surgery.

[0031] In some embodiments, see Figure 3、 Figure 4 、 Figure 9 and Figure 10 The base 1 has a clamping portion 13, which is provided with a positioning hole 14. The shaping device for the superior oblique femur also includes a handle 5, a sliding member 6 and a positioning ball 7. The handle 5 has a sleeve channel 51 and a connecting hole 52 connected to the sleeve channel 51. The handle 5 can be slidably sleeved outside the clamping portion 13 through the sleeve channel 51. The sliding member 6 is slidably inserted into the handle 5. The sliding member 6 is located on the side of the connecting hole 52 away from the sleeve channel 51. The side of the sliding member 6 facing the sleeve channel 51 is provided with a receiving groove 61. The receiving groove 61 has a first side wall 611 inclined toward the outside of the receiving groove 61. The positioning ball 7 is rollingly arranged in the connecting hole 52. The sliding of the sliding member 6 can enable the positioning ball 7 to enter or exit the receiving groove 61 through the first side wall 611. When the handle 5 is slidably sleeved outside the clamping portion 13 through the sleeve channel 51 and the positioning ball 7 exits the receiving groove 61, the positioning ball 7 can enter the positioning hole 14. After the positioning ball 7 enters the receiving groove 61 through the first side wall 611, the handle 5 is then sleeved outside the clamping portion 13 through the sleeve channel 51. Subsequently, the positioning ball 7 is withdrawn from the receiving groove 61 through the first side wall 611 by the sliding of the sliding member 6, thereby allowing the positioning ball 7 to enter the positioning hole 14. In this way, the relative movement between the handle 5 and the base 1 can be limited, so that the base 1 can be controlled by the handle 5. When the upper oblique shaping of the femur 130 is completed, the driving sliding member 6 is driven to slide, so that the positioning ball 7 enters the receiving groove 61 through the first side wall 611, thereby allowing the positioning ball 7 to withdraw from the positioning hole 14, and then the handle 5 can be detached from the base 1. In this embodiment, the sliding direction of the sliding member 6 is parallel to the extension direction of the sleeve channel 51. The end of the connecting hole 52 used to communicate with the sleeve channel 51 is retracted inward to limit the depth of the positioning ball 7 entering the sleeve channel 51.

[0032] In some embodiments, see Figure 10 The side wall of the handle 5 is provided with a first elongated hole 53, the length direction of which is arranged along the sliding direction of the slider 6. The device for shaping the femoral superior obliqueness further includes a driving sleeve 8 and a fixing post 9. The driving sleeve 8 is slidably mounted on the outside of the handle 5 along the sliding direction of the slider 6. The fixing post 9 is movably inserted into the first elongated hole 53 and is fixedly connected to both the driving sleeve 8 and the slider 6. The driving sleeve 8 is fixedly connected to the slider 6 via the fixing post 9, making it more convenient to drive the slider 6 to slide via the driving sleeve 8.

[0033] In some embodiments, see Figure 10The handle 5 is provided with a connecting cavity 54 that communicates with the sleeve channel 51. The connecting cavity 54 is located on one side of the sleeve channel 51 along the sliding direction of the slider 6. A second elongated hole 55 that communicates with the connecting cavity 54 is provided on the side wall of the handle 5. The length of the second elongated hole 55 is arranged along the sliding direction of the slider 6. The device for shaping the upper oblique femur also includes a drive column 10 and a compression spring 110. The drive column 10 is movably inserted into the second elongated hole 55, and one section of the drive column 10 is located in the connecting cavity 54. The drive column 10 is fixedly connected to the drive sleeve 8. The compression spring 110 is located in the connecting cavity 54 and between the drive column 10 and the sleeve channel 51. One end of the compression spring 110 abuts the drive column 10, and the other end is connected to the end wall of the connecting cavity 54 facing the sleeve channel 51. When the slider 6 slides under the rebound force of the compression spring 110, the positioning ball 7 exits the receiving groove 61 through the first side wall 611. The resilience of the compression spring 110 acts on the drive sleeve 8 via the drive post 10, thereby driving the slider 6 to slide. As the slider 6 slides under the resilience of the compression spring 110, the positioning ball 7 exits the receiving groove 61 through the first sidewall 611. Thus, when the device is in use, the resilience of the compression spring 110 prevents the positioning ball 7 from exiting the positioning hole 14 due to the sliding of the slider 6.

[0034] In some embodiments, the above-mentioned characteristic base 1 can be used as follows Figure 1 and Figure 11 The structure shown. Figure 1 and Figure 11 The base 1 has a distraction portion 15, which is used to penetrate between the femur 130 and the tibia 140, thereby distracting the femur 130 and the tibia 140, so as to reduce the shaking of the femur 130 when the device is operated.

[0035] In some embodiments, see Figure 5 、 Figure 7 and Figure 8 The base 1 is provided with a slide 16, which extends along the length direction of the positioning column 2. The shaping device for the upper inclination of the femur also includes a thickening member 120. The thickening member 120 has a sliding portion 1201 that is slidably inserted into the slide 16 and a thickening portion 1202 located on the side of the expansion portion 15 facing away from the femur 130. The expansion portion 15 and the thickening portion 1202 simultaneously penetrate between the femur 130 and the tibia 140, thereby fully expanding the femur 130 and the tibia 140. In this embodiment, since the sliding portion 1201 can slide into and out of the slide 16, the thickening member 120 can be replaced. The slide 16 is a T-shaped slide 16.

[0036] In some embodiments, the above-mentioned thickening member 120 can be used as follows Figure 7 The structure shown. Figure 7The thickening member 120 is provided with a marking 1203 to indicate the distance between the surface of the thickening portion 1202 facing the distraction portion 15 and the surface of the thickening portion 1202 facing away from the distraction portion 15. Because the range of distraction that can be achieved for each patient's femur 130 and tibia 140 varies, multiple thickening members 120 may be provided, and the markings 1203 on different thickening members 120 may be different. By replacing different thickening members 120 on the base 1, the range of distraction that can be achieved for the patient's femur 130 and tibia 140 can be varied. The markings 1203 on the thickening member 120 facilitate selection by medical personnel.

[0037] In some embodiments, see Figure 5 and Figure 8 A positioning groove 161 is provided on the side wall of the slideway 16, and a positioning portion 12013 protruding outward is provided on the sliding portion 1201. The positioning portion 12013 is locked in the positioning groove 161. The positioning portion 12013 cooperates with the positioning groove 161 to limit the sliding of the sliding portion 1201, thereby increasing the reliability of the connection between the thickening member 120 and the base 1.

[0038] In some embodiments, see Figure 5 and Figure 8 The sliding portion 1201 is provided with a notch 12011 that extends through one end of the sliding portion 1201 along the sliding direction of the sliding portion 1201. The sliding portion 1201 has a long strip portion 12012 located on one side of the notch 12011. The length of the long strip portion 12012 is arranged along the sliding direction of the sliding portion 1201. The positioning portion 12013 is located on the side wall of the long strip portion 12012 facing away from the notch 12011. When the sliding portion 1201 is inserted into the slideway 16, the sidewall of the slideway 16 presses the positioning portion 12013 toward the notch 12011, thereby deforming the long strip portion 12012 toward the notch 12011. When the positioning portion 12013 is engaged with the positioning groove 161, the long strip portion 12012 returns to its original position. When the sliding portion 1201 needs to exit the slideway 16, the elongated portion 12012 is deformed toward the notch 12011, thereby allowing the positioning portion 12013 to exit the positioning groove 161. Then, the sliding portion 1201 can slide out of the slideway 16. In this embodiment, the notch 12011 can extend to the thickened portion 1202.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions 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 shaping device for the upper oblique femur, characterized in that: include: The base is provided with a guide hole, wherein the depth of the guide hole is directed toward the upper oblique part of the femur; A positioning column is fixed on the base and is used to penetrate into the femur; Drill rod, used to connect to the electric drill; as well as A shaping piece is fixed on the drill rod, one end of the shaping piece is used to face the upper slope of the femur and is provided with a plurality of shaping blades, the extension direction of the shaping blades is perpendicular to the length direction of the drill rod, and the shaping piece is used to slide through the guide hole so that the shaping blades can abut against the upper slope of the femur.

2. The device for shaping the femur as claimed in claim 1, wherein: The base is also provided with a locking hole for facing the femur.

3. The device for shaping the femur as claimed in claim 1, wherein: The drill rod has an annular portion in a circular ring structure, and the annular portion is sleeved outside the molding.

4. The device for shaping the femur as claimed in claim 3, wherein: A chip removal cavity is provided in the molding part, and the chip removal cavity has an open end at one end facing away from the upper oblique part of the femur. The molding part is provided with a chip feed hole connected to the chip removal cavity at each molding blade, and the side wall of the drill rod is provided with a first chip removal hole connected to the open end of the chip removal cavity.

5. The device for shaping the femur as claimed in claim 4, characterized in that: The side wall of the drill rod is further provided with a second chip removal hole, and the drill rod is further provided with a chip removal channel, with both ends of the chip removal channel being communicated with the first chip removal hole and the second chip removal hole respectively.

6. The device for shaping the femur as claimed in claim 1, wherein: The base has a clamping portion, and the clamping portion is provided with a positioning hole. The shaping device for femoral superior obliqueness also includes: A handle having a sleeve channel and a communication hole communicating with the sleeve channel, wherein the handle can be slidably sleeved outside the clamping portion through the sleeve channel; a sliding member slidingly inserted into the handle, the sliding member being located on a side of the communicating hole away from the sleeve channel, the sliding member being provided with a receiving groove on a side facing the sleeve channel, the receiving groove having a first side wall inclined toward an outside of the receiving groove; A positioning ball is arranged to roll in the communicating hole; In which, the sliding of the sliding member can enable the positioning ball to enter or exit the receiving groove through the first side wall. When the handle is slidably sleeved outside the clamping part through the sleeve channel and the positioning ball exits the receiving groove, the positioning ball can enter the positioning hole.

7. The device for shaping the femur superiorly as claimed in claim 6, wherein: The side wall of the handle is provided with a first elongated hole, the length direction of the first elongated hole is arranged along the sliding direction of the sliding member, and the shaping device for femoral superior obliqueness further includes: A driving sleeve, slidably sleeved on the outside of the handle along the sliding direction of the sliding member; A fixed column is movably arranged in the first elongated hole, and the fixed column is fixedly connected to the driving sleeve and the sliding member.

8. The device for shaping the femur as claimed in claim 7, wherein: The handle is provided with a connecting cavity communicating with the sleeve channel, the connecting cavity is located on one side of the sleeve channel along the sliding direction of the sliding member, and the side wall of the handle is provided with a second elongated hole communicating with the connecting cavity, the length direction of the second elongated hole is arranged along the sliding direction of the sliding member, and the shaping device for femoral superior inclination further includes: A driving post is movably arranged in the second elongated hole and one section of the driving post is located in the connecting cavity, and the driving post is fixedly connected to the driving sleeve; a compression spring located in the connecting cavity and between the driving post and the sleeve passage, one end of the compression spring abutting against the driving post and the other end abutting against an end wall of the connecting cavity facing the sleeve passage; When the sliding member slides under the rebound force of the compression spring, the positioning ball exits the accommodating groove through the first side wall.

9. The device for shaping the femur as claimed in claim 1, wherein: The base has an opening portion, and the opening portion is used to penetrate between the femur and the tibia.

10. The device for shaping the femur as claimed in claim 9, wherein: The base is provided with a slideway, and the slideway extends along the length direction of the positioning column. The shaping device for the upper oblique femur further includes: The thickening member comprises a sliding portion which is slidably arranged in the slideway and a thickening portion which is located on the side of the expansion portion and is used to face away from the femur.

11. The device for shaping the femur as claimed in claim 10, wherein: A positioning groove is provided on the side wall of the slideway, and a positioning portion protruding outward is provided on the sliding portion, and the positioning portion is clamped in the positioning groove.

12. The device for shaping the femur as claimed in claim 11, wherein: The sliding portion is provided with a notch, and the notch passes through one end of the sliding portion along the sliding direction of the sliding portion. The sliding portion has a long strip portion located on one side of the notch and having a long strip structure. The length direction of the long strip portion is arranged along the sliding direction of the sliding portion, and the positioning portion is located on the side wall of the long strip portion facing away from the notch.

Images