Patella resection forceps

Abstract

The application discloses a patella resection forceps, which comprises a first element and a second element which are hingedly connected with each other, and the first element and the second element are respectively provided with a handle end and a working end, the working end of the first element and the working end of the second element are integrally provided with an arc-shaped structure to cooperate with the patella, the working end of the first element is provided with a clamp saw tooth, the working end of the second element is provided with a saw blade slot which penetrates the second element from outside to inside, and a saw blade is used to work on the patella by penetrating the saw blade slot during surgery. The patella resection forceps disclosed by the application can accurately position the patella resection position, is convenient to operate and can reduce the probability of misoperation of a surgeon.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of medical devices, in particular to a patella resection forceps. BACKGROUND

[0002] The patella is located in front of the knee joint, commonly known as the kneecap, and is a flat bone similar to a triangle. The back of the patella is smooth and covered with cartilage, which connects with the femoral patellar surface, and the front surface is rough, with the quadriceps tendon passing through. The presence of the patella can protect the knee joint, especially the femoral patellar surface and femoral condyle, and can keep the patellar ligament away from the axis, increasing the moment of force of the quadriceps muscle and reducing the required force during knee extension.

[0003] In clinical practice, partial resection and drilling of the patella is a relatively effective treatment for patellofemoral arthritis, lateral patellar compression syndrome, and knee replacement surgery. Due to the irregular shape of the patella, it is difficult to accurately measure the amount of bone resection and accurately position the drilling site. Improper operation may cause poor patellar trajectory and secondary damage. The existing surgical tools are difficult to operate and are not accurate enough in positioning, and there is an urgent need for a patella surgical tool that is easy to use and accurate in positioning. SUMMARY

[0004] The purpose of the present application is to provide a patella resection forceps that is easy to use and accurate in positioning to solve the above technical problems.

[0005] To solve the above technical problems, the present application provides a patella resection forceps, which comprises a first element and a second element that are hinged to each other, the first element and the second element each having a handle end and a working end, the working end of the first element and the working end of the second element having an overall arc-shaped structure to cooperate with the patella, wherein the working end of the first element is provided with a clamp saw tooth, and the working end of the second element is provided with a saw blade slot that penetrates the second element from the outside to the inside. During surgery, the saw blade passes through the saw blade slot to work on the patella.

[0006] In one embodiment, the first element and the second element are hinged by a tower-shaped threaded pin, the upper part of the tower-shaped threaded pin forming two annular protrusions, and an annular groove being formed between the two annular protrusions.

[0007] In one embodiment, the first element comprises a first lever and a first connecting rod, the second element comprises a second lever and a second connecting rod, one end of the first connecting rod is connected to the first lever, the other end of the first connecting rod is used for working on the patella, one end of the second connecting rod is connected to the second lever, the other end of the second connecting rod is used for working on the patella, and the second lever is hinged to the first lever, and the second connecting rod is hinged to the first connecting rod.

[0008] In one embodiment, the patella resection forceps further comprises a locking rod and a slide lock, two ends of the locking rod are respectively installed on the first lever and the second lever, and one end of the first connecting rod or the second connecting rod is movable along the locking rod,

[0009] The slide lock comprises at least one protrusion or recess provided on the locking rod and a matching part provided on the first connecting rod or the second connecting rod, and the first lever or the second lever is blocked from moving by matching the protrusion or the recess with the matching part, so that the patella resection forceps enters a locked state.

[0010] In one embodiment, the patella resection forceps further comprises a locking knob provided on the locking rod for further locking the relative position of the first lever and the second lever.

[0011] In one embodiment, one end of the locking rod is fixed on the end of the first lever which is not connected with the first connecting rod, the end of the second lever which is not connected with the second connecting rod is provided with a mounting groove, the other end of the locking rod is matched with the mounting groove and provided with the locking knob.

[0012] In one embodiment, the slide lock comprises a plurality of ratchet protrusions provided on the locking rod, and the plurality of ratchet protrusions can be clamped into the bottom of the mounting groove.

[0013] In one embodiment, two elastic sheets are arranged in a cross arrangement between the first lever and the second lever, one end of the two elastic sheets is cross-connected, and the other end of the two elastic sheets is respectively fixedly connected with the first lever and the second lever.

[0014] In one embodiment, a pen needle is arranged on the patella resection forceps, and the pen needle is installed in the annular groove to indicate the patella resection thickness.

[0015] In one embodiment, a pin is arranged on the patella resection forceps, the first connecting rod and the second connecting rod of the patella resection forceps are hingedly connected through a tower-shaped threaded pin, the upper part of the tower-shaped threaded pin forms two annular protrusions, an annular groove is formed between the two annular protrusions, and the pin is clamped in the annular groove and rotates about the tower-shaped threaded pin as the shaft.

[0016] The patella resection forceps of the present application adopts a lever plus connecting rod structure, which greatly enhances the clamping force of the operating end of the connecting rod. In addition, the patella resection forceps adopts a slide lock for locking, which can quickly lock and unlock, and is convenient to operate.

[0017] The patella resection forceps further comprises a locking rod arranged on the first lever and the second lever, and a locking knob arranged on the locking rod and used for further locking the relative position of the first lever and the second lever. The arrangement enables the patella resection forceps to have double locking structures of a slide lock and a locking knob. When preliminarily adjusting the position of the patella resection forceps, the surgeon first adopts the slide lock for simple locking, continuously checks whether the position of the patella resection forceps is appropriate, and if appropriate, tightens the locking knob to provide final locking. The arrangement improves the positioning accuracy of the patella resection forceps and reduces the probability of misoperation of the surgeon.

[0018] The slide lock is arranged as a plurality of protrusions on the locking rod. The arrangement integrates each component of the patella resection forceps and improves the compactness of the structure.

[0019] The slide lock is arranged as a ratchet protrusion on the locking rod. When the patella resection forceps is in the simple locking state of the slide lock, the arrangement enables the patella resection forceps to have greater resistance to movement to the unlocking state, thereby enhancing the locking effect.

[0020] The first lever and the second lever are arranged with intersecting elastic pieces. One end of each elastic piece is connected to each other, and the other end of each elastic piece is arranged on the first lever and the second lever, respectively. The arrangement enables the working end of the connecting rod of the patella resection forceps to remain in an open state in a natural state, thereby facilitating use.

[0021] One end of the first connecting rod of the patella resection forceps is arranged with a clamp sawtooth, and one end of the second connecting rod of the patella resection forceps is arranged with a saw blade slot. The arrangement enables the patella resection forceps to more stably clamp the patella. The arrangement enables the patella resection forceps to provide guidance for patella osteotomy.

[0022] A pen needle is arranged on the patella resection forceps and used for indicating the resection thickness of the patella. The arrangement enables the patella resection forceps to accurately control the amount of osteotomy.

[0023] The first connecting rod and the second connecting rod of the patella resection forceps are connected through a tower-shaped threaded pin, and the pen needle is detachably buckled on the tower-shaped threaded pin. The arrangement enables the surgeon to more conveniently adjust the height of the pen needle.

[0024] In summary, the patella resection forceps disclosed in the application can accurately position the resection and punching positions of the patella, is convenient to operate, and can reduce the probability of misoperation of the surgeon. BRIEF DESCRIPTION OF DRAWINGS

[0025] Figure 1 FIG. 1 is a perspective view of the patella resection forceps according to an embodiment of the application;

[0026] Figure 2 is Figure 1 a perspective view of a patella resection forceps according to another embodiment of the present application;

[0027] Figure 3 a perspective view of a patella resection forceps according to another embodiment of the present application; DETAILED DESCRIPTION

[0028] The preferred embodiments of the present application will be described herein below with reference to the accompanying drawings, in which the purpose, characteristics and advantages of the present application will be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended to limit the scope of the present application, but are merely intended to illustrate the essential spirit of the technical solutions of the present application.

[0029] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of various disclosed embodiments. It will be appreciated, however, that embodiments can be practiced in many different inventive ways without one or more of the specific details set forth herein. In other instances, well-known structures, structures and techniques associated with the present application are not shown or described in order to avoid unnecessarily obscuring this description.

[0030] Unless otherwise needed by the context, the words "comprise" and variations such as "comprising", and "having" throughout the specification and claims, are to be construed in an open, inclusive and non-exclusive sense, that is, as "including, but not limited to".

[0031] Reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment. Thus, appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics can be combined in any suitable manner in one or more embodiments.

[0032] As used in this specification and the appended claims, the singular forms "a", "an" and "the" include plural referents unless the content clearly dictates otherwise. It should be noted that the term "or" is generally employed in its sense including "and / or", unless the content clearly dictates otherwise.

[0033] In the following description, in order to clearly show the structure and working mode of the present application, many directional words will be used for description, but the words "front", "back", "left", "right", "outer", "inner", "outward", "inward", "up", "down" and the like should be understood as convenient words, and should not be understood as limiting words.

[0034] The patella resection forceps of the present application generally comprises a first element and a second element hingedly connected to each other, the first element and the second element each having a handle end and a working end, the working end of the first element and the working end of the second element having an arcuate structure as a whole to cooperate with the patella, wherein the working end of the first element is provided with a clamp sawtooth, and the working end of the second element is provided with a saw blade slot penetrating the second element from the outside to the inside, and a saw blade is used to work on the patella during surgery by penetrating the saw blade slot. The first element and the second element can be an integral piece respectively, or can be formed by several parts connected to each other. For example, in the embodiment shown in the present application, Figures 1-2 , the first element can comprise a first lever 1 and a first connecting rod 3, and the second element can comprise a second lever and a second connecting rod 4, while in the embodiment shown in the present application, Figure 3 , the first element is a first lever 51, and the second element is a second lever 52. The embodiments of the present application will be described below with reference to the accompanying drawings.

[0035] Figure 1 and Figure 2 are respectively a perspective view and a perspective exploded view of a patella resection forceps 100 according to an embodiment of the present application. As shown in Figures 1-2 , the patella resection forceps 100 comprises a first lever 1, a second lever 2, a first connecting rod 3 and a second connecting rod 4, the first lever 1 and the second lever 2 are hingedly connected, and the first connecting rod 3 and the second connecting rod 4 are hingedly connected. In this document, for the convenience of description, the end close to the jaw of the patella resection forceps is referred to as the front end, and the end opposite to the jaw is referred to as the rear end. The first connecting rod 3 is connected to the first lever 1 at the front end of the first lever 1, and the second connecting rod 4 is connected to the second lever 2 at the front end of the second lever 2. Among them, the first lever 1 and the second lever 2 are hingedly connected at the positions close to the respective front ends, and the first connecting rod 3 and the second connecting rod 4 are hingedly connected at the respective rear parts.

[0036] The end of the first connecting rod 3 and the second connecting rod 4 away from the first lever 1 and the second lever 2 (i.e. the end provided with the jaw) is the working end, which is used to work on the patella.

[0037] Continuing to refer to Figures 1-2 , the rear end of the first lever 1 and the second lever 2 is provided with a locking rod 5. The two ends of the locking rod 5 are respectively connected to the rear end of the first lever 1 and the second lever 2. Specifically, one end of the locking rod 5 is fixed to the rear end of the first lever 1 (i.e. the end part away from the first connecting rod 3) through a pin 12, and the other end of the locking rod 5 is installed on the rear end of the second lever 2 (i.e. on the end away from the second connecting rod 4) and is provided with a locking knob 7. The locking knob 7 is sleeved on the locking rod 5 and can slide along the locking rod 5, and at the same time cooperates with the threads on the locking rod 5 to be locked. It can be understood that one end of the locking rod 5 can also be fixed to the end part of the second lever 2 away from the second connecting rod 4 through the pin 12, and the other end is installed on the end of the first lever 1 away from the first connecting rod 3.

[0038] The patella resection forceps is also provided with a slide lock 6. In the embodiment, the slide lock 6 is at least one protrusion or recess arranged along the running track of the locked object on the side of the running direction of the locked object. The locked object is blocked by the protrusion into the movement path to enter the locked state, or the locked object is blocked by the locked object into the inside of the recess to enter the locked state. The slide lock 6 is used for preliminary locking of the patella resection forceps, and the locking knob 7 is used for further locking of the patella resection forceps. Specifically, when the surgeon preliminarily adjusts the position of the patella resection forceps, the slide lock 6 is first used for simple locking, and the position of the patella resection forceps is continuously observed to see if it is appropriate. If the position is appropriate, the locking knob 7 is tightened to provide the final locking. The arrangement can improve the positioning accuracy of the patella resection forceps and reduce the probability of misoperation of the surgeon.

[0039] In Figure 1 and Figure 2 A preferred embodiment of the slide lock 6 is shown in the embodiment, that is, the slide lock 6 is arranged on the locking rod 5, and the locking knob 7 is also arranged on the same locking rod 5. It can be understood that the slide lock 6 is arranged on other rods, which also belongs to the protection scope of the present application. In an embodiment, the slide lock 6 is arranged as a plurality of protrusions uniformly distributed along the axial direction of the locking rod 5. The plurality of protrusions can have various shapes, and the plurality of protrusions can be arranged as elastic members, and the elastic members are unlocked by pressing.

[0040] In an embodiment, the slide lock 6 can also be arranged as a plurality of ratchet protrusions uniformly distributed along the axial direction of the locking rod 5. The arrangement makes the patella resection forceps in the simple locking state of the slide lock locking have greater resistance when moving to the unlocked state, enhancing the locking effect. At the same time, the arrangement of the ratchet protrusions is consistent with the curved arrangement of the threads of the locking rod 5, which does not affect the cooperation and locking of the locking knob 7 and the threads of the locking rod 5. In addition, the arrangement reduces the manufacturing cost compared with other types of slide lock arrangements.

[0041] In an embodiment, the first lever 1 and the second lever 2 are provided with two cross-shaped elastic pieces 8. One end of the two cross-shaped elastic pieces 8 is connected to each other, and the other end of the two cross-shaped elastic pieces 8 is connected to the end of the first lever 1 away from the first connecting rod 3 and the end of the second lever 2 away from the second connecting rod 4, respectively. The arrangement makes the working end of the patella resection forceps linkage in a natural state maintain an open state, which is convenient to use. The elastic piece 8 is in a curved strip shape, and one of the two cross-shaped elastic pieces has a "concave" shaped end, and the other has a "convex" shaped end. When assembling, the "convex" shaped end is inserted into the "concave" shaped end to make the two elastic pieces cross and tightly clamped, and the other end of the two elastic pieces is fastened to the inside of the first lever 1 and the second lever 2 through the head nail 13, respectively. It can be understood that the elastic piece 8 can be arranged in other ways, and the number of elastic pieces can be arranged as one pair or multiple pairs.

[0042] In one embodiment, the first connecting rod 3 of the patella resection forceps 100 is provided with a plurality of clamping saw teeth 31 at one end away from the first lever 1 for clamping the patella. The second connecting rod 4 of the patella resection forceps 100 is provided with a saw blade slot 41 extending along the length of the second lever 2 at one end away from the second lever 2 as a bone cutting guide.

[0043] In one embodiment, the first lever 1 and the second lever 2 of the patella resection forceps 100 are hingedly connected by a screw 11 and are hingedly connected with the first connecting rod 3 and the second connecting rod 4 respectively at the front end by a screw 9, and the first connecting rod 3 and the second connecting rod 4 are hingedly connected by a tower-shaped threaded pin 10. The tower-shaped threaded pin 10 is provided with two annular protrusions 101 at the upper part, and a recess 102 is formed between the two annular protrusions 101. A pen needle (not shown in the figure) is detachably buckled in the recess 102 formed between the two annular protrusions 101 of the tower-shaped threaded pin 10 and can rotate around the tower-shaped threaded pin 10 as the shaft.

[0044] During operation, first measure the thickness of the patella and evaluate the bone cutting thickness of the patella. Adjust the scale of the pen needle to adjust the bone cutting amount to the required value. The scale of the pen needle represents the bone cutting amount, and the value should be consistent with the thickness of the patella component to be implanted. After confirming the bone cutting amount, buckle the pen needle to the patella resection forceps 100, and the bone cutting amount is from the position of the pen needle to the position of the patella resection forceps 100 clamping the patella.

[0045] Subsequently, straighten the lower limbs and evert the patella. Place the assembled patella resection forceps 100 so that the pen needle is aimed at the position of the patella articular surface that protrudes the most. Align the working part of the first connecting rod 3 provided with saw teeth with the edge of the upper and lower articular surfaces of the patella, and use the slide lock 6 for simple locking. After confirming that the medial and lateral sides are well aligned, tighten the saw teeth and tighten the locking knob 7 to provide additional fixation. Use the saw blade to cut the patella through the saw blade slot provided on the second connecting rod 4. Figure 3 A perspective exploded view of the patella resection forceps 200 of another embodiment of the present application is shown. The main difference between the patella resection forceps 200 of the present embodiment and the patella resection forceps 100 of the previous embodiment is mainly that the first lever 51 and the second lever 52 of the patella resection forceps 200 are of an integral structure, and the structure of the slide lock 55.

[0046] As shown in Figure 3 The patella resection forceps 200 is provided with a first lever 51 and a second lever 52, and the first lever 51 and the second lever 52 are hingedly connected. A working end 53 and a working end 54 are provided at the front of the hinged point of the first lever 51 and the second lever 52, and the working end 53 and the working end 54 are used for working on the patella. A handle end is provided at the rear of the hinged point of the first lever 51 and the second lever 52 to facilitate holding.

[0047] The patella resection forceps 200 further comprises a slide lock 55. The slide lock 55 is arranged on the side of the moving direction of the locked object, and at least one protrusion or recess is arranged along the moving track of the locked object. The locked object is blocked by the protrusion to enter the locked state, or the locked object is blocked by the locked object to enter the locked state.

[0048] In Figure 3 A preferred embodiment of the slide lock 55 is shown in the illustrated embodiment. The slide lock 55 is arranged in a rod shape, and a rod-shaped main body 551 is provided with a plurality of ratchet protrusions 552. One end of the rod-shaped main body 551 is fixed to the handle end of the first lever 51 by a pin 58 and can rotate around the pin 58 as the rotation axis, and the other end of the rod-shaped main body 551 is installed on the handle end of the second lever 52. Specifically, the handle end of the second lever 52 is provided with a recess 521, and the other end of the rod-shaped main body 551 is fitted into the recess 521 and extends a distance in a direction perpendicular to the recess 521, thereby forming an arrangement in which one end of the rod-shaped main body 551 is hinged to the handle end of the first lever 55, and the other end of the rod-shaped main body 551 is overlapped in the recess 521 of the handle end of the second lever 52. In this embodiment, the protrusions 551 of the slide lock are arranged in a ratchet shape, so that when the patella resection forceps are in the simple locking state of the slide lock, the movement to the unlocked state is resisted by a greater force, enhancing the locking effect.

[0049] It can be understood that the slide lock 55 can be arranged in other structures, and the shape is not limited to a rod shape. The ratchet protrusions of the slide lock 55 can also be arranged in other shapes of protrusions, and a plurality of protrusions can also be arranged as elastic members, and the unlocking is performed by pressing the elastic members. The plurality of protrusions can also be replaced by one or more movable protrusions. This arrangement makes it more difficult for the patella resection forceps to move to the unlocked state when they are in the simple locking state of the slide lock, enhancing the locking effect.

[0050] Continuing to refer to Figure 3 , a pair of cross springs 56 is further arranged between the first lever 51 and the second lever 52. One end of the cross springs 56 is connected to each other, and the other end of the cross springs 56 is fixedly connected to the first lever 51 and the second lever 52, respectively. This arrangement allows the working end of the patella resection forceps lever to remain in an open state in a natural state, facilitating use. Preferably, the cross springs 56 are in a curved strip shape. At the end where the springs 56 cross, the end of one of the springs is in a "concave" shape, and the end of the other spring is in a "convex" shape. During assembly, the "convex" shaped spring is inserted into the "concave" shaped interior to make the two springs cross, and the other ends of the two springs are respectively fastened to the inside of the first lever 51 and the inside of the second lever 52 by a head nail 59. It can be understood that the springs 56 can be fixed in other ways.

[0051] The working end 54 of the second lever of the patella resection forceps 200 is provided with a plurality of clamping serrations 541 for clamping the patella. The working end 53 of the first lever of the patella resection forceps 200 is provided with a saw blade slot 531 as a bone cutting guide.

[0052] In an embodiment, the first lever 51 and the second lever 52 of the patella resection forceps 200 are connected by a hinged connection of a tower screw 57. The tower screw 57 is provided with two annular protrusions 571 at the upper end, and an annular groove 572 is formed between the two annular protrusions 571. A pen needle (not shown in the figure) is detachably buckled in the annular groove 572 between the two annular protrusions 571 of the tower screw 57, and can rotate around the tower screw 57 as an axis.

[0053] During operation, first measure the thickness of the patella, and evaluate the bone cutting thickness of the patella. Adjust the scale of the pen needle, and adjust the bone cutting amount to the required value. The scale of the pen needle represents the bone cutting amount, and the value should be consistent with the thickness of the patella component to be implanted. After confirming the bone cutting amount, buckle the pen needle to the patella resection forceps 200, and the bone cutting amount is from the position of the pen needle to the position of the patella resection forceps 200 clamping the patella.

[0054] Subsequently, straighten the lower limbs, and evert the patella. Place the assembled patella resection forceps 200, and make the pen needle point to the position of the most protruding articular surface of the patella. Align the working part of the first lever 51 provided with serrations with the edge of the upper and lower articular surfaces of the patella, and lock by using the slide lock 55. After confirming that the medial side and the lateral side are well aligned, use the saw blade to cut the patella through the saw blade slot provided on the second lever 51.

[0055] As can be seen from the above description, the patella resection forceps 100 and 200 of the present application are locked by using a slide lock, and can accurately position the patella. In addition, serrations are provided on the working end of the second lever of the patella resection forceps, a saw blade slot is provided on the working end of the first lever, and a tower screw is provided at the hinged connection of the first lever and the second lever for installing a pen needle, which is a clever design, and can complete the measurement of the bone cutting amount of the patella and the bone cutting in one step.

[0056] The preferred embodiments of the present application have been described in detail above, but it should be understood that aspects of the embodiments can be modified if necessary to employ aspects, features and concepts of various patents, applications and publications to provide additional embodiments.

[0057] These and other changes can be made to the embodiments in light of the above detailed description. In general, in the appended claims, the terms used should not be construed to limit the application to the specific embodiments disclosed in the specification and the claims, but should be construed to include all embodiments that would be covered by the terms of the claims following the patent statutory provisions.

Claims

1. A patella resecting forceps characterized by, The patella resection forceps comprises a first element and a second element which are hingedly connected to each other, the first element and the second element each have a handle end and a working end, the working end of the first element and the working end of the second element have an arc-shaped structure as a whole to cooperate with the patella, wherein the working end of the first element is provided with a clamp saw tooth, and the working end of the second element is provided with a saw blade slot which penetrates the second element from outside to inside; The first element comprises a first lever and a first connecting rod, the second element comprises a second lever and a second connecting rod, one end of the first connecting rod is connected with the first lever, the other end of the first connecting rod is used for working on the patella, one end of the second connecting rod is connected with the second lever, the other end of the second connecting rod is used for working on the patella, and the second lever is hingedly connected with the first lever, and the second connecting rod is hingedly connected with the first connecting rod; The first lever and the second lever are hingedly connected by a screw, and the first connecting rod and the second connecting rod are hingedly connected by a screw at the front end, respectively, and the first connecting rod and the second connecting rod are hingedly connected by a tower-shaped threaded nail; The first element and the second element are hingedly connected by a tower-shaped threaded nail, the upper part of the tower-shaped threaded nail forms two annular protrusions, and an annular groove is formed between the two annular protrusions; A pen needle is arranged on the patella resection forceps, the pen needle is installed in the annular groove to indicate the thickness of the patella resection, and the pen needle can rotate around the tower-shaped threaded nail as the shaft.

2. The patella resecting forceps according to claim 1, wherein, The patella resection forceps further comprises a locking rod and a sliding lock, two ends of the locking rod are respectively installed on the first lever and the second lever, and one end of the first connecting rod or the second connecting rod can move along the locking rod, The sliding lock comprises at least one protrusion or recess arranged on the locking rod and a matching part arranged on the first connecting rod or the second connecting rod, the movement of the first lever or the second lever is blocked by matching the protrusion or the recess with the matching part, so that the patella resection forceps enters a locked state.

3. The patella resecting forceps according to claim 2, wherein, The patella resection forceps further comprises a locking knob, the locking knob is arranged on the locking rod and is used for further locking the relative position of the first lever and the second lever.

4. The patella resecting forceps according to claim 3, wherein One end of the locking rod is fixed on the end of the first lever which is not connected with the first connecting rod, the end of the second lever which is not connected with the second connecting rod is provided with a mounting groove, the other end of the locking rod is matched with the mounting groove and is provided with the locking knob.

5. The patella resecting forceps according to claim 4, wherein, The sliding lock comprises a plurality of ratchet protrusions arranged on the locking rod, and the plurality of ratchet protrusions can be clamped into the bottom of the mounting groove.

6. The patella resecting forceps according to claim 2, wherein Two elastic sheets are arranged in a cross arrangement between the first lever and the second lever, one end of the two elastic sheets is cross-connected, and the other end of the two elastic sheets is fixedly connected with the first lever and the second lever, respectively.

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