CN110772298A

CN110772298A - Patella resection forceps

Info

Publication number: CN110772298A
Application number: CN201910814070.3A
Authority: CN
Inventors: 王俊文
Original assignee: Beijing Golden Charlie Artificial Joint Technology Co Ltd; Kuangyue Medical Equipment (suzhou) Co Ltd
Current assignee: Beijing Golden Charlie Artificial Joint Technology Co Ltd; Kuangyue Medical Equipment (suzhou) Co Ltd
Priority date: 2019-08-30
Filing date: 2019-08-30
Publication date: 2020-02-11

Abstract

The invention discloses a pair of patella resectioning forceps, which comprises a first component and a second component which are hinged with each other, wherein the first component and the second component are respectively provided with a handle end and a working end, the working end of the first component and the working end of the second component are integrally provided with arc structures to be matched with a patella, the working end of the first component is provided with forceps saw teeth, the working end of the second component is provided with a saw blade groove which penetrates through the second component from outside to inside, and a saw blade penetrates through the saw blade groove to operate the patella during operation. The patella resectioning forceps disclosed by the invention can be used for accurately positioning the patella resectioning position, is convenient and fast to operate and can be used for reducing the misoperation probability of an operator.

Description

Patella resection forceps

Technical Field

The invention relates to the field of medical instruments, in particular to a patella resectioning forceps.

Background

The patella is located in front of the knee joint, commonly known as the patella, and is a flat bone that approximates a triangle. The back of the patella is covered with cartilage which is connected with the patellar surface of the femur, the front side surface is rough, and the quadriceps femoris muscle tendon passes through the cartilage. The kneecap can protect the knee joint, especially the kneecap surface and the femoral condyle of the femur, and can enable the kneecap ligament to be far away from the axis, increase the action moment of the quadriceps femoris, and reduce the required force when stretching the knee.

Clinically, when the patella femoral osteoarthritis and the lateral patella clamping and pressing syndrome are treated and knee joint replacement surgery is carried out, partial patella resection and drilling are a relatively effective treatment mode. Because the patella presents irregular shape, the accurate quantification of the amount of osteotomy of patella part cutting and the accurate positioning difficulty of the drilling position are great. Improper operation may result in poor patellar tracking and secondary injury. The operation degree of difficulty of current operation instrument is great, and the location is accurate enough, needs a kneecap bone operation instrument that can use conveniently, fixes a position accurately urgently.

Disclosure of Invention

The invention aims to provide a pair of patella resectioning forceps which is convenient to use and accurate in positioning, so as to solve the technical problems.

In order to solve the technical problem, the invention provides a pair of patella resectioning forceps, which comprises a first component and a second component which are hinged to each other, wherein the first component and the second component are respectively provided with a handle end and a working end, the working end of the first component and the working end of the second component are integrally provided with an arc-shaped structure so as to be matched with a patella, the working end of the first component is provided with clamping saw teeth, and the working end of the second component is provided with saw blade grooves which penetrate through the second component from outside to inside. The saw blade passes through the saw blade slot to operate the patella during operation.

In one embodiment, the first and second elements are hinged by a tower-shaped screw nail, the upper part of which forms two annular projections, between which an annular groove is formed.

In one embodiment, the first element comprises a first lever and a first link, the second element comprises a second lever and a second link, one end of the first link is connected with the first lever, the other end of the first link is used for patellar operation, one end of the second link is connected with the second lever, the other end of the second link is used for patellar operation, and the second lever is hinged with the first lever and the second link is hinged with the first link.

In one embodiment, the patella resectioning forceps further comprises a locking rod and a slide lock, wherein two ends of the locking rod are respectively arranged on the first lever and the second lever, and one end of the first connecting rod or one end of the second connecting rod can move along the locking rod,

the sliding lock comprises at least one protruding part or recessed part arranged on the locking rod and a matching part arranged on the first connecting rod or the second connecting rod, and the patella resectoscope is enabled to enter a locking state by blocking the movement of the first lever or the second lever through the matching of the protruding part or the recessed part and the matching part.

In one embodiment, the patella resectioning forceps further comprises a locking knob disposed on the locking rod for further locking the relative positions of the first lever and the second lever.

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, and the other end of the locking rod is matched with the mounting groove and is provided with the locking knob.

In one embodiment, the slide lock includes a plurality of ratchet protrusions provided on the locking lever, the plurality of ratchet protrusions being capable of snapping into the bottom of the mounting groove.

In one embodiment, two elastic pieces which are arranged in a crossed manner are arranged between the first lever and the second lever, one ends of the two elastic pieces are connected in a crossed manner, and the other ends of the two elastic pieces are respectively fixedly connected with the first lever and the second lever.

In one embodiment, the patella resectioning forceps is provided with a pen needle which is mounted in the annular groove to indicate the patella resectioning thickness.

In one embodiment, the patella resectioning forceps is provided with a pin, the first connecting rod and the second connecting rod of the patella resectioning forceps are hinged through a tower-shaped threaded nail, two annular bulges are formed on the upper portion of the tower-shaped threaded nail, an annular groove is formed between the two annular bulges, and the pin is clamped in the annular groove and rotates around the tower-shaped threaded nail.

The patella resectioning forceps adopt a structure of a lever and a connecting rod, and greatly enhance the engagement force of the operating end of the connecting rod. In addition, this patella resectoscope adopts the slip lock to lock, can lock fast and unblock, the simple operation.

The patella resectioning forceps further comprise a locking rod, and the locking rod is arranged on the first lever and the second lever; and the locking knob is arranged on the locking rod and used for further locking the relative position of the first lever and the second lever. This arrangement provides a dual locking arrangement for the patella resectioning forceps with a slide lock and a lock knob lock. When the position of the patella resectioning clamp is initially adjusted, an operator firstly adopts the sliding lock to simply lock, continuously checks whether the position of the patella resectioning clamp is proper or not, and screws the locking knob to provide final locking if the position is proper. This arrangement improves the positioning accuracy of the patella resectioning forceps and reduces the probability of misoperation of the operator.

The sliding lock is arranged into a plurality of bulges on the locking rod, and the arrangement integrates all parts of the patella resectioning forceps, so that the compactness of the structure is improved.

The sliding lock is arranged as a ratchet wheel protrusion on the locking rod, and the arrangement enables the patella resectioning forceps to move towards an unlocking state under larger resistance when the patella resectioning forceps are in a simple locking state locked by the sliding lock, so that the locking effect is enhanced.

The first lever and the second lever are provided with a first elastic sheet, the first lever and the second lever are provided with a second elastic sheet, the first elastic sheet and the second elastic sheet are arranged on the first lever and the second lever respectively, and the second elastic sheet is arranged on the second lever. The setting makes the operation end of the patella resectioning forceps connecting rod keep an opening state under the natural state, and the use is convenient.

One end of the first connecting rod of the patella resectioning forceps is provided with a forceps sawtooth, and one end of the second connecting rod of the patella resectioning forceps is provided with a saw blade groove. The provision of the clamping serrations enables the patella resectioning clamp to grip the patella more firmly. The provision of the blade slots enables the patella resectioning forceps to provide guidance for the patella osteotomy.

The patella resectioning forceps are provided with pen needles for indicating the patella resectioning thickness. This arrangement enables the patella resectioning forceps to accurately control the amount of osteotomy.

The first connecting rod and the second connecting rod of the patella resectioning forceps are hinged through a tower-shaped threaded nail, and the pen needle is detachably buckled on the tower-shaped threaded nail. The arrangement enables an operator to adjust the height of the pen needle more conveniently.

In conclusion, the patella resectioning forceps disclosed by the invention can accurately position the patella resectioning and punching positions, is convenient and fast to operate, and can reduce the misoperation probability of an operator.

Drawings

FIG. 1 is a perspective view of a patellar resectioning forceps in accordance with one embodiment of the present invention;

FIG. 2 is an exploded perspective view of the patellar resectioning forceps of FIG. 1;

fig. 3 is a perspective view of another embodiment of a patella resectioning forceps of the present disclosure.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings so that the objects, features and advantages of the invention can be more clearly understood. It should be understood that the embodiments shown in the drawings are not intended as limitations on the scope of the invention, but are merely illustrative of the true spirit of the technical solutions of the present invention.

In the following description, for the purposes of illustrating various disclosed embodiments, certain specific details are set forth in order to provide a thorough understanding of the various disclosed embodiments. One skilled in the relevant art will recognize, however, that the embodiments may be practiced without one or more of the specific details. In other instances, well-known devices, structures and techniques associated with this application may not be shown or described in detail to avoid unnecessarily obscuring the description of the embodiments.

Throughout the specification and claims, the word "comprise" and variations thereof, such as "comprises" and "comprising," are to be understood as an open, inclusive meaning, i.e., as being interpreted to mean "including, but not limited to," unless the context requires otherwise.

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, the 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 may be combined in any suitable manner in one or more embodiments.

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

In the following description, for the purposes of clearly illustrating the structure and operation of the present invention, directional terms will be used, but terms such as "front", "rear", "left", "right", "outer", "inner", "outer", "inward", "upper", "lower", etc. should be construed as words of convenience and should not be construed as limiting terms.

The patella resectioning forceps generally comprise a first component and a second component which are hinged with each other, wherein the first component and the second component are respectively provided with a handle end and a working end, the working end of the first component and the working end of the second component are integrally provided with arc structures to be matched with the patella, the working end of the first component is provided with forceps saw teeth, the working end of the second component is provided with a saw blade groove which penetrates through the second component from outside to inside, and a saw blade penetrates through the saw blade groove to perform patella operation during operation. The first and second elements may each be one piece or may be constructed of several parts connected to each other. For example, in the embodiment of the invention shown in fig. 1-2, the first element may comprise a first lever 1 and a first link 3, and the second element may comprise a second lever and a second link 4, whereas in the embodiment shown in fig. 3, the first element is a first lever 51 and the second element is a second lever 52. Embodiments of the present invention are described below with reference to the drawings.

Fig. 1 and 2 are perspective and exploded views, respectively, of a patella resectioning forceps 100 in accordance with an embodiment of the present invention. As shown in fig. 1-2, the patella resectioning forceps 100 includes a first lever 1, a second lever 2, a first link 3 and a second link 4, the first lever 1 and the second lever 2 are hinged, and the first link 3 and the second link 4 are hinged. For ease of description herein, the end of the jaws that is proximal to the patella resectioning forceps is referred to as the anterior end, and the end opposite the jaws is referred to as the posterior end. The front end of the first lever 1 is connected with a first connecting rod 3, and the front end of the second lever 2 is connected with a second connecting rod 4. Wherein, the first lever 1 and the second lever 2 are hinged at a position close to the front end of each, and the first connecting rod 3 and the second connecting rod 4 are hinged at the rear end of each.

The ends 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 ends provided with the jaws) are working ends for working the patella.

With continued reference to fig. 1-2, the rear ends of the first and

second levers

1 and 2 are provided with a locking bar 5. Both ends of the locking rod 5 are connected to the rear ends of the first lever 1 and the second lever 2, respectively. Specifically, one end of the locking lever 5 is fixed on the rear end of the first lever 1 (i.e., the end portion away from the end of the first link 3) by a pin 12, and the other end of the locking lever 5 is mounted on the rear end of the second lever 2 (i.e., the end away from the second link 4) and 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 meanwhile, the locking knob is matched with threads on the locking rod 5 for locking. It will be appreciated that one end of the locking lever 5 may also be fixed by a pin 12 to the end of the second lever 2 remote from the end of the second link 4, while the other end is mounted on the end of the first lever 1 remote from the first link 3.

The patella resectioning forceps are also provided with a slide lock 6. In the present embodiment, the slide lock 6 is at least one protruding portion or recessed portion provided along the traveling track of the locked object on the side of the traveling direction of the locked object, and the locked object is blocked by the protruding portion protruding into the moving path of the locked object to enter the locked state, or the locked object is blocked by the locked object protruding into the recessed portion to enter the locked state. Wherein the slide lock 6 is used for initially locking the patella resectioning forceps and the locking knob 7 is used for further locking the patella resectioning forceps. Specifically, when the operator preliminarily adjusts the position of the patella resectioning forceps, firstly, the sliding lock 6 is adopted for simple locking, whether the position of the patella resectioning forceps is suitable or not is continuously checked, and if the position is suitable, the locking knob 7 is screwed down to provide final locking. The arrangement can improve the positioning precision of the patella resectioning forceps and reduce the misoperation probability of an operator.

In the embodiment of fig. 1 and 2, a preferred embodiment of the slide lock 6 is shown, i.e. the slide lock 6 is arranged on the lock lever 5 and the locking knob 7 is also arranged on the same lock lever 5. It is understood that the slide lock 6 is provided on other rods, and falls within the scope of the present invention. In one embodiment, the slide lock 6 is provided as a plurality of protrusions evenly distributed along the axial direction of the lock lever 5, and the plurality of protrusions may take various shapes, and may be arranged as an elastic member, and the unlocking is performed by pressing the elastic member.

In one embodiment, the slide latch 6 may also be provided as a plurality of ratchet protrusions evenly distributed along the axial direction of the lock lever 5. This setting makes patella resectioning pincers be in the simple and easy locking state of slide lock locking, and the removal of going the unblock state receives bigger resistance, reinforcing locking effect. Meanwhile, the arrangement of the ratchet wheel protrusions is consistent with the thread bending arrangement of the locking rod 5, and the matching locking of the locking knob 7 and the threads on the locking rod 5 is not affected. In addition, this arrangement reduces manufacturing costs relative to other types of slide lock arrangements.

In one embodiment, two crossed elastic sheets 8 are arranged between the first lever 1 and the second lever 2, one ends of the two elastic sheets 8 are connected with each other in a crossed manner, and the other ends of the two elastic sheets 8 are respectively connected with the end of the first lever 1 far away from the first connecting rod 3 and the end of the second lever 2 far away from the second connecting rod 4. The setting makes the operation end of the patella resectioning forceps connecting rod keep an opening state under the natural state, and the use is convenient. The elastic sheets 8 are in a bent strip shape, and at one crossed end of the elastic sheets 8, one elastic sheet is provided with a concave-shaped end part, and the other elastic sheet is provided with a convex-shaped end part. During assembly, the convex end is inserted into the concave end to enable the two elastic sheets to be clamped in a crossed mode, and the other ends of the two elastic sheets are fastened on the inner side of the first lever 1 and the inner side of the second lever 2 through the headed nails 13 respectively. It is understood that the resilient pieces 8 may be arranged in other ways, and the number of the resilient pieces may be arranged in one or more pairs.

In one embodiment, the end of the first link 3 of the patella resectioning forceps 100 remote from the first lever 1 is provided with a plurality of clamping serrations 31 for clamping the patella. The end of the second link 4 of the patella resectioning forceps 100 away from the second lever 2 is provided with a blade groove 41 extending along the length of the second lever 2 as a osteotomy guide.

In one embodiment, the first lever 1 and the second lever 2 of the patella resectioning forceps 100 are hinged by a screw 11 and are hinged at the front end by a screw 9 with the first connecting rod 3 and the second connecting rod 4 respectively, and the first connecting rod 3 and the second connecting rod 4 are hinged by a tower-shaped threaded nail 10. Wherein, two annular protrusions 101 are formed at the upper part of the tower-shaped screw 10, a groove 102 is formed between the two annular protrusions 101, and a pen needle (not shown) is detachably fastened in the groove 102 formed between the two annular protrusions 101 of the tower-shaped screw 10 and can rotate around the tower-shaped screw 10.

In operation, the thickness of the patella is first measured and the osteotomy thickness of the patella is evaluated. And adjusting the scale of the pen needle to adjust the bone cutting amount to a required value. The scale of the stylus represents the amount of osteotomy, which should be of a value consistent with the thickness of the patellar component to be implanted. The pen pins are snapped onto the patella resectioning forceps 100 after the amount of bone resection is confirmed, from the position of the pen pins to the position where the patella resectioning forceps 100 grips the patella.

The lower limb is then straightened and the patella is everted. The assembled patella resectioning forceps 100 is positioned with the stylus aligned in the most prominent position on the patellar articular surface. The operating part provided with sawteeth on the first connecting rod 3 is aligned with the edges of the upper and lower patella articular surfaces, and the sliding lock 6 is adopted for simple locking. After confirming that the medial and lateral sides are well aligned, gripping the serrations and tightening the locking knob 7 provides additional securement. The patella osteotomy is performed using the saw blade through the saw blade slot provided on the second link 4. Fig. 3 shows a perspective exploded view of a patella resectioning forceps 200 according to another embodiment of the present invention. The main differences between the patella resectioning forceps 200 of the present embodiment and the patella resectioning forceps 100 of the previous embodiment are mainly that the first lever 51 and the second lever 52 of the patella resectioning forceps 200 are of a unitary structure, and that the structure of the slide lock 55.

As shown in fig. 3, the patella resectioning 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 hinge point of the first lever 51 and the second lever 52, and the working ends 53 and 54 are used for working the patella. A handle end is provided at a rear portion of a hinge point of the first lever 51 and the second lever 52 to facilitate grasping.

The patella resectioning forceps 200 also includes a slide lock 55. The slide lock 55 is provided on the side of the traveling direction of the to-be-locked article, and at least one of a projection and a recess is provided along the traveling locus of the to-be-locked article, and the to-be-locked article is blocked to enter the locked state by the projection extending into the traveling path of the to-be-locked article, or the to-be-locked article is blocked to enter the locked state by the to-be-locked article extending into the recess.

A preferred embodiment of the slide latch 55 is shown in the embodiment shown in fig. 3. The slide lock 55 is provided in a rod shape, and a rod-shaped body 551 is packaged, and a plurality of ratchet protrusions 552 are provided on the rod-shaped body 551, wherein one end of the rod-shaped body 551 is fixed on the handle end of the first lever 51 through a pin 58 and can rotate by taking the pin 58 as a rotation axis, and the other end of the rod-shaped 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 groove 521, the other end of the rod-shaped body 551 is fittingly installed in the groove 521 and extends out for a certain distance along the direction perpendicular to the groove 521, so that one end of the rod-shaped body 551 is hinged to the handle end of the first lever 55, and the other end of the rod-shaped body 551 is overlapped in the groove 521 of the handle end of the second lever 52. In this embodiment, the protrusion 551 of the slide lock is configured to be ratchet-shaped, so that when the patella resectoscope is in the simple locked state of the slide lock locking, the patella resectoscope is moved to the unlocked state with greater resistance, and the locking effect is enhanced.

It will be appreciated that the slide latch 55 may be provided in other configurations and the shape is not limited to a rod. The ratchet protrusion of the slide lock 55 may be provided as a protrusion of other shapes, and a plurality of protrusions may be arranged as an elastic member, and unlocking is performed by pressing the elastic member. The plurality of protrusions may also be replaced by one or more moving protrusions. This setting makes patella resectioning pincers be in the simple and easy locking state of slide lock locking, and the removal of going the unblock state receives bigger resistance, reinforcing locking effect.

With reference to fig. 3, a pair of cross spring plates 56 is further disposed between the first lever 51 and the second lever 52, one ends of the cross spring plates 56 are cross-connected to each other, and the other ends of the cross spring plates 56 are fixedly connected to the first lever 51 and the second lever 52, respectively. The setting makes the operation end of the patella resectioning forceps lever keep the opening state under the natural state, and the use is convenient. Preferably, the cross spring 56 is in the shape of a curved strip. At the crossing end of the spring plates 56, the end of one spring plate is concave, and the end of the other spring plate is convex. During assembly, the convex spring plate is inserted into the concave spring plate to enable the two spring plates to be crossed, and the other ends of the two spring plates are fastened on the inner side of the first lever 51 and the inner side of the second lever 52 through headed nails 59 respectively. It is understood that the spring 56 may be secured in other manners.

The working end 54 of the second lever of the patella resectioning 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 resectioning forceps 200 is provided with a blade groove 531 as a osteotomy guide.

In one embodiment, the first lever 51 and the second lever 52 of the patella resectioning forceps 200 are hingedly connected by a stepped threaded screw 57. Wherein, two annular bulges 571 are formed at the upper part of the tower-type screw nail 59, and an annular groove 572 is formed between the two annular bulges 571. The pen needle (not shown) is detachably fastened in the annular groove 572 between the two annular protrusions 571 of the tower-shaped screw nail 57 and can rotate around the tower-shaped screw nail 57.

In operation, the thickness of the patella is first measured and the osteotomy thickness of the patella is evaluated. And adjusting the scale of the pen needle to adjust the bone cutting amount to a required value. The scale of the stylus represents the amount of osteotomy, which should be of a value consistent with the thickness of the patellar component to be implanted. The pen pins are snapped onto the patella resectioning forceps 200 after the amount of bone resection is confirmed, from the position of the pen pins to the position where the patella resectioning forceps 200 grips the patella.

The lower limb is then straightened and the patella is everted. The assembled patella resectioning forceps 200 is positioned with the stylus aligned in the most prominent position on the patellar articular surface. The serrated working part of the first lever 51 is aligned with the edge of the patella superior-inferior articular surface, and is locked by a slide lock 55. After confirming that the medial and lateral alignment is good, a patella osteotomy is performed using a saw blade through a saw blade slot provided on the second lever 51.

From the foregoing, it can be seen that the

patella resectioning forceps

100 and 200 of the present invention employ a slide lock for locking to enable precise positioning of the patella. In addition, the operating end of the second lever of the patella resectioning forceps is provided with the saw teeth, the operating end of the first lever is provided with the saw blade groove, and the hinged position of the first lever and the second lever is provided with the tower-shaped threaded nail for mounting the pen needle, so that the design is ingenious, and the measurement of the patella osteotomy amount and the osteotomy can be completed in one step.

While preferred embodiments of the present invention have been described in detail above, it should be understood that aspects of the embodiments can be modified, if necessary, to employ aspects, features and concepts of the various patents, applications and publications to provide yet further embodiments.

These and other changes can be made to the embodiments in light of the above detailed description. In general, in the claims, the terms used should not be construed to be limited to the specific embodiments disclosed in the specification and the claims, but should be construed to include all possible embodiments along with the full scope of equivalents to which such claims are entitled.

Claims

1. The patellar resectioning forceps are characterized by comprising a first component and a second component which are hinged to each other, wherein the first component and the second component are respectively provided with a handle end and a working end, the working end of the first component and the working end of the second component are integrally provided with arc structures to be matched with a patella, clamping saw teeth are arranged at the working end of the first component, and a saw blade groove penetrating through the second component from outside to inside is formed in the working end of the second component.

2. The patellar resectioning forceps according to claim 1, wherein the first and second components are hinged by a stepped threaded nail having an upper portion forming two annular projections with an annular groove formed therebetween.

3. The patellar resectioning forceps according to claim 1, wherein the first element includes a first lever and a first link, the second element includes a second lever and a second link, one end of the first link is connected with the first lever, the other end of the first link is used for patellar operation, one end of the second link is connected with the second lever, the other end of the second link is used for patellar operation, and the second lever is hinged with the first lever, and the second link is hinged with the first link.

4. The patellar resectioning forceps according to claim 3, further comprising a locking rod and a slide lock, wherein both ends of the locking rod are mounted on the first lever and the second lever, respectively, and one end of the first link or the second link is movable along the locking rod,

5. The patellar resectioning forceps according to claim 4, further comprising a locking knob disposed on the locking rod for further locking the relative positions of the first and second levers.

6. The patellar resectioning forceps according to claim 5, wherein one end of the locking rod is fixed to an end of the first lever not connected to the first link, an end of the second lever not connected to the second link is provided with a mounting groove, and the other end of the locking rod is fitted with the mounting groove and provided with the locking knob.

7. The patellar resectioning forceps according to claim 4, wherein the slide lock includes a plurality of ratchet projections provided on the lock lever, the plurality of ratchet projections being capable of snapping into the bottom of the mounting slot.

8. The patellar resectioning forceps according to claim 4, wherein two elastic pieces are arranged in a crossed manner between the first lever and the second lever, one ends of the two elastic pieces are connected in a crossed manner, and the other ends of the two elastic pieces are respectively fixedly connected with the first lever and the second lever.

9. The patellar resectioning forceps according to claim 2, wherein a pen needle is provided on the patellar resectioning forceps, the pen needle being mounted in the annular groove to indicate patellar resectioning thickness.

10. The patellar resectioning forceps according to claim 4, wherein a pin is provided on the patellar resectioning forceps, the first connecting rod and the second connecting rod of the patellar resectioning forceps are hinged through a tower-shaped threaded nail, two annular protrusions are formed on the upper portion of the tower-shaped threaded nail, an annular groove is formed between the two annular protrusions, and the pin is clamped in the annular groove and rotates around the tower-shaped threaded nail.