A strike-in femoral condyle holder

Abstract

The application discloses a knock-in femoral condyle holder, which comprises a handle, one end of the handle is provided with a main rod, the handle and the main rod are connected through a quick-connection mechanism, one end of the main rod away from the handle is provided with a clamping block, one end of the clamping block away from the main rod is a femoral condyle prosthesis or a femoral condyle test mold, and the main rod is provided with a locking device. The knock-in femoral condyle holder can realize the function of holding the condyle in the middle and meet the more refined and convenient operation requirements without changing the test mold and the prosthesis. In addition, the clamping block can be locked without the test mold or the prosthesis, so that the clamping block can serve as a knock-in device to knock the prosthesis, and other devices need not be replaced.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an insertable femoral condyle holder. Background Technology

[0002] The knee joint is one of the largest and most complex joints in the human body, and it is the most important joint in human movement. Knee joint prosthesis systems have been developed for decades. When the natural knee joint loses some or all of its function due to disease or injury, a knee joint prosthesis system is needed to replace it, restoring normal knee joint function, reducing patient pain and inconvenience. Knee joint replacement surgery can achieve the best treatment results and restore the patient's mobility to the greatest extent possible.

[0003] Femoral condyle replacement is part of knee joint replacement surgery. Since the size of the femur varies from patient to patient, there are usually a series of femoral condyle prostheses available. During the surgery, the size of the femoral condyle needs to be measured using appropriate femoral measuring tools and femoral condyle trial molds of different sizes to determine the final size of the implanted prosthesis. Then, the prosthesis is held in place by a special femoral condyle holder and installed in the appropriate position. After that, the matching inserter is replaced, and the back end of the inserter is tapped with a medical hammer or other tools to ensure that the femoral condyle prosthesis is completely implanted.

[0004] In the existing technology, the femoral condyle holder and the driver are two separate instruments. The femoral condyle holder generally has a clamp that can hold femoral molds and prostheses of different sizes. However, the clamping method is to clamp from both sides, which will interfere with soft tissue during use, increasing the difficulty of the operation. In addition, the existing holder cannot directly strike the prosthesis or mold, and a matching driver needs to be replaced, which is inconvenient.

[0005] This invention discloses an insertable femoral condyle holder to solve the above-mentioned problems. Summary of the Invention

[0006] The purpose of this invention is to provide an insertable femoral condyle holder to solve the problems mentioned in the background art.

[0007] To address the aforementioned technical problems, the present invention provides the following technical solution: an insertable femoral condyle holder, comprising a handle for easy hand gripping, a main rod at one end of the handle, the main rod being a cylindrical structure, the handle and the main rod being connected by a quick-connect mechanism for rapid connection between the handle and the main rod, facilitating use during surgery, a clamping block at the end of the main rod away from the handle, the clamping block forming a first layer of clamping force on the femoral condyle prosthesis or femoral condyle mold, the end of the clamping block away from the main rod being the femoral condyle prosthesis or femoral condyle mold, a locking device on the main rod forming a second layer of clamping force on the femoral condyle prosthesis or femoral condyle mold, which, together with the first layer of clamping force, forms a stable clamping, facilitating intraoperative manipulation of the femoral condyle prosthesis or femoral condyle mold.

[0008] Preferably, clamping plates are provided on both sides of the end of the clamping block away from the main rod, and a clamping groove is provided on the intercondylar side of the femoral condyle prosthesis or femoral condyle mold. The clamping plates extend into the clamping grooves to form a plane clamping of the femoral condyle prosthesis or femoral condyle mold. There are two symmetrically arranged clamping plates and clamping grooves, so that the clamping block and the femoral condyle prosthesis (or femoral condyle mold) form a parallel clamping. At the same time, placing the clamping groove on the intercondylar side of the femoral condyle prosthesis or femoral condyle mold allows the clamping block to form a clamping on the inner side of the femoral condyle prosthesis or femoral condyle mold. When the femoral condyle prosthesis or femoral condyle mold is placed at the knee joint, the holder will not interfere with the soft tissue, which facilitates the placement of the prosthesis and mold.

[0009] Preferably, the locking device includes a locking knob, a sleeve, a locking block, and a slot. The main rod has a locking knob, and one end of the locking knob has a sleeve. The locking knob and the sleeve are integrally formed. The sleeve has an internal thread, and the main rod has a thread. The sleeve is screwed onto the main rod. A locking block is sleeved on the outside of the main rod. One side of the locking knob abuts against the locking block. When the sleeve moves relative to the main rod, it can move the locking block. The side of the locking block away from the locking knob contacts the femoral condyle prosthesis or femoral condyle mold. When the locking block moves, it exerts pressure on the femoral condyle prosthesis or femoral condyle mold, thus forming a second layer of clamping force. The second layer of clamping force assists the first layer of clamping force in forming a stable clamping of the femoral condyle prosthesis or femoral condyle mold. The locking block has a hollow groove in the middle, and the clamping block is located in the hollow groove. Placing the clamping block into the hollow groove can make the size of this gripper smaller and the structure more compact.

[0010] Preferably, the locking block has a through hole in the middle, the sleeve extends into the through hole, and a protective ring is also fitted on the outside of the sleeve. A groove is provided in the through hole at a position corresponding to the protective ring, and the protective ring is located in the groove. When the locking knob and the sleeve drive the locking block to move, friction will occur between the sleeve and the locking block, causing the locking block to be worn. The protective ring can protect the locking block from being worn.

[0011] Preferably, the locking block has a concave end that contacts the femoral condyle prosthesis or femoral condyle mold. The shape of the concave surface can fit closely with the bottom surface of the femoral condyle prosthesis or femoral condyle mold to form a three-dimensional clamping effect on the femoral condyle prosthesis or femoral condyle mold.

[0012] Preferably, the clamping block has a first locking step in the middle and a second locking step in the hollow groove. After the femoral condyle prosthesis or femoral condyle mold is placed in the knee, the holder and the femoral condyle prosthesis or femoral condyle mold can be separated. Then, the locking device is used to move the locking block towards the clamping block until the first locking step and the second locking step are locked together. The holder can then replace the percussion tool to strike the femoral condyle prosthesis or femoral condyle mold, so that the locking block acts on the femoral condyle prosthesis or femoral condyle mold, ensuring that the femoral condyle prosthesis or femoral condyle mold is completely implanted.

[0013] Preferably, the main rod and the clamping block are connected by a pin.

[0014] Preferably, the quick-connect mechanism includes a stop flange protrusion, a polygonal anti-rotation block, a locking part, an anti-disengagement block, a polygonal anti-rotation groove, a locking block, a through hole, a spring, a first pin, a waist-shaped hole, and a second pin. The main rod near the handle end is sequentially provided with a stop flange protrusion, a polygonal anti-rotation block, a locking part, and an anti-disengagement block. The main rod, stop flange protrusion, polygonal anti-rotation block, locking part, and anti-disengagement block are integrally formed. The stop flange protrusion abuts against the end of the handle. A polygonal anti-rotation groove is provided in the handle at a position corresponding to the polygonal anti-rotation block to prevent circumferential rotation of the main rod. A locking block is provided in the handle at a position corresponding to the locking part to lock the locking part. An extension is provided in the handle at a position corresponding to the anti-disengagement block. The locking block is designed to prevent the main rod from detaching. One end of the locking block extends beyond the handle. A through hole is provided in the middle of the locking block, and the locking part extends into the through hole. A spring is provided at the lower end of the locking block. The spring generates elastic force on the locking block, causing the locking block to be subjected to force, which in turn causes the lower edge of the through hole to exert force on the locking part, thereby locking the locking part. A first pin is provided at the lower end of the spring. The two ends of the first pin are fixed inside the handle. The first pin is used to prevent the spring from coming out. An oblong hole is provided at the upper part of the locking block. A second pin extends into the oblong hole. The two ends of the second pin are fixed inside the handle. The oblong hole and the second pin are used to limit the locking block and prevent the locking block from coming out.

[0015] Preferably, the locking block is made of POM, and the hardness of POM is less than that of the femoral condyle prosthesis or femoral condyle mold, which can prevent damage to the femoral condyle prosthesis or femoral condyle mold during impact.

[0016] Compared with the prior art, the beneficial effects achieved by the present invention are:

[0017] 1. The present invention discloses an insertable femoral condyle holder that can clamp the medial side of the femoral condyle prosthesis or femoral condyle mold, thereby achieving the function of intermediate condyle holding. When the femoral condyle prosthesis or femoral condyle mold is placed at the knee joint, the holder will not interfere with the soft tissue, which facilitates the insertion of the prosthesis and mold and can meet the needs of more precise and convenient surgery.

[0018] 2. The present invention discloses an insertable femoral condyle holder, which firstly uses a clamping block to form a first layer of clamping force on the femoral condyle prosthesis or femoral condyle mold, and then uses a locking device to form a second layer of clamping force on the femoral condyle prosthesis or femoral condyle mold. The two layers of clamping forces cooperate with each other, and the end of the locking block that contacts the femoral condyle prosthesis or femoral condyle mold is set as a concave surface, forming a three-dimensional clamping of the femoral condyle prosthesis or femoral condyle mold, so that the holding action of the holder is stable and reliable;

[0019] 3. The present invention discloses an insertable femoral condyle holder. After the femoral condyle prosthesis or femoral condyle mold is placed in the knee, the holder can be disengaged from the femoral condyle prosthesis or femoral condyle mold. Then, using a locking device, the locking block is moved towards the clamping block and locked between the first locking step and the second locking step. Thus, the holder can replace the percussion tool to strike the femoral condyle prosthesis or femoral condyle mold. That is, the holder has a dual function and reduces the number of instruments used during surgery. Attached Figure Description

[0020] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings:

[0021] Figure 1 This is a perspective view of an insertable femoral condyle holder according to the present invention;

[0022] Figure 2 This is an exploded view of an insertable femoral condyle holder according to the present invention;

[0023] Figure 3 This is a perspective view of the locking knob and locking block of the present invention;

[0024] Figure 4 This is a perspective view of the clamping block and locking block of the present invention;

[0025] Figure 5This is an exploded view of the quick-connect mechanism of the present invention;

[0026] In the diagram: Handle-1; Main rod-2; Quick-connect mechanism-3; Clamping block-4; Femoral condyle prosthesis-5; Femoral condyle trial mold-6; Locking device-7; Clamping plate-8; Clamping groove-9; Locking knob-10; Sleeve-11; Locking block-12; Hollowed-out groove-13; Through hole-14; Protective ring-15; Edge groove-16; Concave surface-17; No. 2 pin-18; No. 1 locking step-19; No. 2 locking step-20; Pin-21; Stop edge protrusion-22; Polygonal anti-rotation block-23; Locking part-24; Anti-disengagement block-25; Polygonal anti-rotation groove-26; Locking block-27; Through hole-28; Spring-29; No. 1 pin-30; Waist-shaped hole-31. Detailed Implementation

[0027] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0028] Example: The present invention provides a technical solution, such as... Figure 1 An insertable femoral condyle holder includes a handle 1 for easy hand gripping. A main rod 2, cylindrical in shape, is attached to one end of the handle 1. The handle 1 and main rod 2 are connected via a quick-connect mechanism 3 for rapid connection during surgery. A clamping block 4 is located at the end of the main rod 2 furthest from the handle 1, providing a first-layer clamping force on the femoral condyle prosthesis 5 or femoral condyle mold 6. The end of the clamping block 4 furthest from the main rod 2 is the femoral condyle prosthesis 5 or femoral condyle mold 6. A locking device 7 is provided on the main rod 2, providing a second-layer clamping force on the femoral condyle prosthesis 5 or femoral condyle mold 6. Combined with the first-layer clamping force, a stable clamping is formed, facilitating intraoperative manipulation of the femoral condyle prosthesis 5 or femoral condyle mold 6.

[0029] like Figure 2Clamping plates 8 are provided on both sides of the clamping block 4 away from the main rod 2. A clamping groove 9 is provided on the intercondylar side of the femoral condyle prosthesis 5 or femoral condyle mold 6. The clamping plate 8 extends into the clamping groove 9, which can form a plane clamping of the femoral condyle prosthesis 5 or femoral condyle mold 6. There are two symmetrical clamping plates 8 and clamping grooves 9, so that the clamping block 4 and the femoral condyle prosthesis 5 (or femoral condyle mold 6) form a parallel clamping. At the same time, the clamping groove 9 is placed on the intercondylar side of the femoral condyle prosthesis 5 or femoral condyle mold 6, so that the clamping block 4 can clamp the inner side of the femoral condyle prosthesis 5 or femoral condyle mold 6. When the femoral condyle prosthesis 5 or femoral condyle mold 6 is placed at the knee joint, the holder will not interfere with the soft tissue, which facilitates the insertion of the prosthesis and mold.

[0030] like Figure 2 The locking device 7 includes a locking knob 10, a sleeve 11, a locking block 12, and a slot 13. The locking knob 10 is mounted on the main rod 2, and a sleeve 11 is attached to one end of the locking knob 10. The locking knob 10 and sleeve 11 are integrally formed. The sleeve 11 has an internal thread, and the main rod 2 has a thread. The sleeve 11 is screwed onto the main rod 2. The locking block 12 is sleeved on the outside of the main rod 2. One side of the locking knob 10 abuts against the locking block 12. When the sleeve 11 moves relative to the main rod 2, it can move the locking block 12. The side away from the locking knob 10 contacts the femoral condyle prosthesis 5 or femoral condyle mold 6. When the locking block 12 moves, it generates pressure on the femoral condyle prosthesis 5 or femoral condyle mold 6, thus forming a second layer of clamping force on the femoral condyle prosthesis 5 or femoral condyle mold 6. The second layer of clamping force assists the first layer of clamping force in forming a stable clamping of the femoral condyle prosthesis 5 or femoral condyle mold 6. The locking block 12 has a hollow groove 13 in the middle, and the clamping block 4 is located in the hollow groove 13. Placing the clamping block 4 into the hollow groove 13 can make the size of this gripper smaller and the structure more compact.

[0031] like Figure 3 The locking block 12 has a through hole 14 in the middle, and the sleeve 11 extends into the through hole 14. A protective ring 15 is also fitted on the outside of the sleeve 11. A groove 16 is provided in the through hole 14 at a position corresponding to the protective ring 15. The protective ring 15 is located in the groove 16. When the locking knob 10 and the sleeve 11 drive the locking block 12 to move, friction will occur between the sleeve 11 and the locking block 12, causing the locking block 12 to be worn. The protective ring 15 is provided to protect the locking block 12 from being worn.

[0032] like Figure 3 The locking block 12 has a concave surface 17 at one end that contacts the femoral condyle prosthesis 5 or the femoral condyle mold 6. The shape of the concave surface 17 can fit closely with the bottom surface of the femoral condyle prosthesis 5 or the femoral condyle mold 6, forming a three-dimensional clamping effect on the femoral condyle prosthesis 5 or the femoral condyle mold 6.

[0033] like Figure 4The clamping block 4 has a first locking step 19 in the middle and a second locking step 20 in the hollow groove 13. After the femoral condyle prosthesis 5 or femoral condyle mold 6 is placed in the knee, the holder and the femoral condyle prosthesis 5 or femoral condyle mold 6 can be separated. Then, the locking device 7 is used to move the locking block 12 towards the clamping block 4 until the first locking step 19 and the second locking step 20 are locked together. Then the holder can replace the percussion tool to strike the femoral condyle prosthesis 5 or femoral condyle mold 6, so that the locking block 12 acts on the femoral condyle prosthesis 5 or femoral condyle mold 6, ensuring that the femoral condyle prosthesis 5 or femoral condyle mold 6 is completely implanted.

[0034] like Figure 2 The main rod 2 and the clamping block 4 are connected by a pin 21.

[0035] like Figure 5 The quick-connect mechanism 3 includes a stop flange protrusion 22, a polygonal anti-rotation block 23, a locking part 24, an anti-detachment block 25, a polygonal anti-rotation groove 26, a locking block 27, a through hole 28, a spring 29, a first pin 30, a waist-shaped hole 31, and a second pin 18. The main rod 2, near the end of the handle 1, is sequentially provided with the stop flange protrusion 22, the polygonal anti-rotation block 23, the locking part 24, and the anti-detachment block 25. The main rod 2, the stop flange protrusion 22, the polygonal anti-rotation block 23, the locking part 24, and the anti-detachment block 25 are integrally formed. The stop flange protrusion 22 abuts against the end of the handle 1. A polygonal anti-rotation groove 26 is provided in the handle 1 at a position corresponding to the polygonal anti-rotation block 23 to prevent the main rod 2 from rotating circumferentially. A locking block 27 is provided in the handle 1 at a position corresponding to the locking part 24 to lock the locking part 24. The locking block 27 is used to lock the locking part 24. The locking block 27 is provided with an insertion groove to prevent the main rod 2 from disengaging. One end of the locking block 27 extends out of the handle 1. A through hole 28 is provided in the middle of the locking block 27, and the locking part 24 extends into the through hole 28. A spring 29 is provided at the lower end of the locking block 27. The spring 29 generates elastic force on the locking block 27, causing the locking block 27 to be subjected to force, so that the lower edge of the through hole 28 exerts force on the locking part 24, thereby locking the locking part 24. A first pin 30 is provided at the lower end of the spring 29. The two ends of the first pin 30 are fixed in the handle 1. The first pin 30 is used to prevent the spring 29 from disengaging. A waist-shaped hole 31 is provided at the upper part of the locking block 27. A second pin 18 extends into the waist-shaped hole 31. The two ends of the second pin 18 are fixed in the handle 1. The waist-shaped hole 31 and the second pin 18 are used to limit the locking block 27 and prevent the locking block 27 from disengaging.

[0036] The locking block 12 is made of POM, which has a lower hardness than the femoral condyle prosthesis 5 or the femoral condyle mold 6, thus preventing damage to the femoral condyle prosthesis 5 or the femoral condyle mold 6 during impact.

[0037] The working principle of this invention is as follows: When installing a femoral condyle prosthesis 5 or a femoral condyle mold 6 at the knee joint, the quick-connect mechanism 3 is used to quickly connect the handle 1 and the main rod 2. Then, the clamping plate 8 of the clamping block 4 is inserted into the clamping groove 9 to form a first layer of clamping force on the femoral condyle prosthesis 5 or the femoral condyle mold 6. Then, the locking device 7 is used to form a second layer of clamping force on the femoral condyle prosthesis 5 or the femoral condyle mold 6. Apply force to stably clamp the femoral condyle prosthesis 5 or femoral condyle trial mold 6, then hold the handle 1 to place the femoral condyle prosthesis 5 or femoral condyle trial mold 6 into the distal femur. Then remove the holder and lock the clamping block 4 and locking block 12. Finally, use the locking block 12 of the holder to tap the femoral condyle prosthesis 5 or femoral condyle trial mold 6 to completely implant the femoral condyle prosthesis 5 or femoral condyle trial mold 6 into the distal femur.

[0038] The principle of the quick-connect mechanism 3 is as follows: the polygonal anti-rotation block 23, the locking part 24, and the anti-disengagement block 25 are inserted into the handle 1 in sequence. The polygonal anti-rotation block 23, combined with the polygonal anti-rotation groove 26, prevents the main rod 2 from rotating circumferentially. The spring 29 at the lower end of the locking block 27 generates elastic force on the locking block 27, causing the locking block 27 to be subjected to force, so that the lower edge of the through hole 28 generates force on the locking part 24, thereby locking the locking part 24. The anti-disengagement block 25, combined with the groove, prevents the main rod 2 from disengaging from the handle 1.

[0039] The principle of the locking device 7 is as follows: rotating the locking knob 10 causes the sleeve 11 to move relative to the main rod 2, which in turn moves the locking block 12, causing the locking block 12 to exert pressure on the femoral condyle prosthesis 5 or the femoral condyle mold 6, thus forming a second layer of clamping force on the femoral condyle prosthesis 5 or the femoral condyle mold 6. The second layer of clamping force assists the first layer of clamping force in forming a stable clamping of the femoral condyle prosthesis 5 or the femoral condyle mold 6.

[0040] The principle of locking between clamping block 4 and locking block 12 is as follows: the locking block 12 continuously moves towards clamping block 4 until it locks between locking step 19 and locking step 20. Then, this gripper can replace the percussion tool to strike the femoral condyle prosthesis 5 or femoral condyle mold 6, and use external force to make the locking block 12 act on the femoral condyle prosthesis 5 or femoral condyle mold 6.

[0041] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0042] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An insertable femoral condyle holder, comprising a handle (1), characterized in that: The handle (1) is provided with a main rod (2) at one end. The handle (1) and the main rod (2) are connected by a quick-connect mechanism (3). The main rod (2) is provided with a clamping block (4) at the end away from the handle (1). The clamping block (4) at the end away from the main rod (2) is a femoral condyle prosthesis (5) or a femoral condyle trial mold (6). The main rod (2) is provided with a locking device (7). The clamping block (4) is provided with clamping plates (8) on both sides of the end away from the main rod (2). The intercondylar side of the femoral condyle prosthesis (5) or femoral condyle test mold (6) is provided with clamping grooves (9). The clamping plates (8) extend into the clamping grooves (9) so that the clamping block (4) and the femoral condyle prosthesis (5) or femoral condyle test mold (6) form parallel clamping. The locking device (7) includes a locking knob (10), a sleeve (11), and a locking block (12). The main rod (2) is provided with a locking knob (10). One end of the locking knob (10) is provided with a sleeve (11). The sleeve (11) is provided with an internal thread. The main rod (2) is provided with a thread. The sleeve (11) is screwed onto the main rod (2). The main rod (2) is sleeved with a locking block (12). The side of the locking block (12) away from the locking knob (10) contacts the femoral condyle prosthesis (5) or the femoral condyle trial mold (6). The locking device (7) also includes a hollow groove (13), and the locking block (12) has a hollow groove (13) in the middle, and the clamping block (4) is located in the hollow groove (13).

2. The infemoral condyle retainer according to claim 1, characterized in that: The locking block (12) has a through hole (14) in the middle, the sleeve (11) extends into the through hole (14), and a protective ring (15) is also sleeved on the outside of the sleeve (11). A groove (16) is provided in the through hole (14) corresponding to the protective ring (15), and the protective ring (15) is located in the groove (16).

3. The infemoral condyle retainer according to claim 1, characterized in that: The locking block (12) has a concave surface (17) at one end that contacts the femoral condyle prosthesis (5) or femoral condyle trial mold (6).

4. The infemoral condyle retainer according to claim 1, characterized in that: The clamping block (4) is provided with a first locking step (19) in the middle, and the hollow groove (13) is provided with a second locking step (20).

5. The infemoral condyle retainer according to claim 1, characterized in that: The main rod (2) and the clamping block (4) are connected by a pin (21).

6. The infemoral condyle retainer according to claim 1, characterized in that: The quick-connect mechanism (3) includes a stop flange protrusion (22), a polygonal anti-rotation block (23), a locking part (24), an anti-disengagement block (25), a polygonal anti-rotation groove (26), a locking block (27), a through hole (28), a spring (29), a first pin (30), a waist-shaped hole (31), and a second pin (18). The main rod (2) near the handle (1) is provided with a stop flange protrusion (22), a polygonal anti-rotation block (23), a locking part (24), and an anti-disengagement block (25) in sequence. The stop flange protrusion (22) abuts against the end of the handle (1). A polygonal anti-rotation groove (26) is provided in the handle (1) at the position corresponding to the polygonal anti-rotation block (23). The handle (1) is provided with a groove corresponding to the locking part (24). A locking block (27) is provided at the position of the handle (1). An insertion groove is provided in the handle (1) at the position corresponding to the anti-detachment block (25). One end of the locking block (27) extends out of the handle (1). A through hole (28) is provided in the middle of the locking block (27). The locking part (24) extends into the through hole (28). A spring (29) is provided at the lower end of the locking block (27). A first pin (30) is provided at the lower end of the spring (29). Both ends of the first pin (30) are fixed in the handle (1). A waist-shaped hole (31) is provided at the upper part of the locking block (27). A second pin (18) extends into the waist-shaped hole (31). Both ends of the second pin (18) are fixed in the handle (1).

7. The infemoral condyle retainer according to claim 1, characterized in that: The locking block (12) is made of POM.

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