CN217186321U - Patella clamp - Google Patents

Abstract

The utility model relates to a patella anchor clamps, the mutual articulated assembly of first handle and second handle, the near-end of first bracket is articulated with the distal end of first handle, the guide is fixed on first bracket, the guide has first direction orbit, first direction orbit is perpendicular with first bracket, the distal end of second handle is articulated with the second bracket, the second bracket is along first direction orbit and guide sliding assembly, the near-end and the first handle swing joint of second bracket, with can be along with the second bracket for the rotation of second handle and for the slip of guide, keep second bracket and first bracket parallel. Above-mentioned patella anchor clamps, in order to satisfy the centre gripping of the irregular shape of patella, first bracket and second bracket are designed to be can be along with the distal end of first handle and second handle keep the state that is parallel to each other throughout in the motion of separating each other and merging each other, centre gripping patella that can be stable does benefit to all kinds of operation operations that relate to the patella, like fixed centre gripping, punch and prosthesis installation etc..

Description

Patella clamp

Technical Field

The utility model relates to the technical field of medical equipment, especially relate to patella anchor clamps.

Background

In the artificial knee joint surgical replacement, the accurate quantification of the patella osteotomy amount and the accurate positioning of the drilling position are very critical to the surgery, but the patella is irregular in shape, the control difficulty on the patella osteotomy amount and the drilling position is high, and the patella track is possibly poor once the osteotomy is improper, so that the joint or muscle damage is caused.

At present, a clamp instrument design principle for the kneecap cuts bone is roughly divided into two kinds, one kind is for transversely pressing from both sides tight kneecap design, another kind is for vertically pressing from both sides tight kneecap design, because of the kneecap shape is irregular, the operation degree of difficulty is great when utilizing the horizontal mode of stepping up to carry out the kneecap and handling, and the precision is not high, and the vertical mode of clamping adopts scissors formula pliers usually, be pitch arc motion when the jaw of scissors formula pliers opens and shuts, it is inhomogeneous to lead to kneecap thickness after cutting the bone easily, increase the kneecap fracture risk, consequently, the clamping effect of two kinds of modes is all nonideal, can't satisfy current operation demand.

SUMMERY OF THE UTILITY MODEL

In view of the above, it is necessary to provide a patella clamp for solving the problem of undesirable patella clamping effect.

The utility model provides a patella anchor clamps, patella anchor clamps include:

the first handle and the second handle are mutually hinged and assembled;

a first bracket, a proximal end of the first bracket being hinged to a distal end of the first handle;

the guide piece is fixed on the first bracket and provided with a first guide track, and the first guide track is perpendicular to the first bracket;

a second bracket, a distal end of the second handle being hinged to the second bracket, the second bracket being slidably mounted to the guide along the first guide track, and a proximal end of the second bracket being movably coupled to the first handle to maintain the second bracket parallel to the first bracket as the second bracket rotates relative to the second handle and slides relative to the guide.

In one embodiment, the distal end of the second handle is hinged to the second bracket by a hinge member slidably fitted to the guide member along the first guide track, and the second bracket is indirectly slidably fitted to the guide member by the hinge member.

In one embodiment, the guide member has a first linear sliding hole, the first linear sliding hole is configured to form the first guide track, the hinge member is a first pin shaft, the first pin shaft passes through the first linear sliding hole to be slidably assembled with the guide member, the distal end of the second handle has a slot, and part of the second bracket is accommodated in the slot and is hinged to the second handle through two ends of the first pin shaft.

In one embodiment, the proximal end of the second bracket has a slide rail portion having a second guide track, the first handle has a sliding portion thereon, the sliding portion is located in the proximal direction of the hinge position of the first handle and the second handle, and the sliding portion is slidably assembled with the slide rail portion along the second guide track and can rotate relative to the slide rail portion.

In one embodiment, a second linear sliding hole is formed in the sliding rail portion, the second linear sliding hole is configured to form the second guide track, the sliding connection portion is a second pin shaft disposed on the first handle, and the second pin shaft penetrates through the second linear sliding hole to be movably assembled with the sliding rail portion.

In one embodiment, the patellar clamp further comprises:

a locker movably fitted on the guide, the locker configured to limit a range in which the second bracket slides along the first guide track.

In one embodiment, the guiding member is a rod-shaped member, the outer wall of the guiding member has an external thread, and the locking member is a nut, and the nut is assembled and connected with the external thread.

In one embodiment, the patellar clamp further comprises:

the limiting part is arranged on the guide part and configured to be in limiting fit with the locking part so as to limit the locking part to be separated from the guide part.

In one embodiment, the distal end of the first bracket is provided with a supporting part, and the supporting part is provided with a spike facing the direction of the second bracket;

and/or the distal end of the second bracket is provided with an interchangeable structure configured at least for removably mounting an osteotomy plate, a punch guide, or a prosthesis installer.

In one embodiment, the patellar clamp further comprises:

a resilient member disposed between the first handle and the second handle, the resilient member configured to apply a resilient force to the first handle and the second handle urging the two apart.

In order to meet the requirement of clamping the irregular shape of the patella, the first bracket and the second bracket are designed to be in a mutually parallel state all the time along with the movement that the far ends of the first handle and the second handle are mutually separated and combined, an operator only needs to operate the near ends of the first handle and the second handle to control the separation and combination of the near ends of the first handle and the second handle, so that the far ends of the first handle and the second handle can be driven to be separated and combined through the hinged assembly relation of the first handle and the second handle, then the far ends of the first handle and the second handle can drive the first bracket and the second bracket to approach or leave in a mutually parallel state all the time, the operation mode is very simple and convenient, the distance between the first bracket and the second bracket can be quickly and efficiently adjusted, the patella can be stably clamped by utilizing the constantly kept parallel state between the first bracket and the second bracket, and various surgical operations related to the patella are facilitated, such as fixation clamping, perforation, prosthesis installation, etc.

Drawings

Fig. 1 is an exploded view of a portion of a patella clip according to an embodiment of the present invention;

fig. 2 is an assembly view of the first bracket and guide of the patella clip shown in fig. 1;

fig. 3 is a schematic structural view of a second bracket of the patella clamp shown in fig. 1;

fig. 4 is a cross-sectional view a-a of the patella clip shown in fig. 3.

Reference numerals:

100. a first handle; 200. a second handle; 300. a first bracket; 400. a second bracket; 500. a guide member; 600. a locking member; 700. a limiting member; 800. an elastic member;

310. a bearing part; 320. a spike;

410. an articulation member; 420. a first linear slide hole; 430. a slide rail portion; 440. a sliding connection part; 450. a second linear slide hole; 460. disassembling and replacing the structure;

510. and (4) external threads.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, as those skilled in the art will be able to make similar modifications without departing from the spirit and scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

In the present application, unless expressly stated or limited otherwise, the first feature may be directly on or directly under the second feature or indirectly via intermediate members. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

To more clearly describe the structure of the delivery system, the term "distal" is defined herein to mean the end that is distal from the operator during a surgical procedure, e.g., the end of the patella clip that is used to grip the patella is distal, and the term "proximal" is defined to mean the end that is proximal to the operator during a surgical procedure, e.g., the end that the operator grips and controls the patella clip to separate and merge is proximal. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

Referring to fig. 1 to 4, an embodiment of the present invention provides a patella clamp, including: a first handle 100, a second handle 200, a first bracket 300, a second bracket 400, a guide 500, said first handle 100 and said second handle 200 being hingedly assembled to each other, a proximal end of said first bracket 300 being hingedly connected to a distal end of said first handle 100, said guide 500 being fixed to said first bracket 300, said guide 500 having a first guide trajectory, said first guide trajectory being perpendicular to said first bracket 300, it being readily understood that the perpendicular herein is not merely a mathematical perpendicular but may include engineering tolerances. The distal end of the second handle 200 is hinged to the second bracket 400, the second bracket 400 is slidably assembled with the guide 500 along the first guide track, and the proximal end of the second bracket 400 is movably connected to the first handle 100 so as to keep the second bracket 400 parallel to the first bracket 300 as the second bracket 400 rotates relative to the second handle 200 and slides relative to the guide 500.

The patella clamp is a tool for clamping the patella and is specially used for the clamping operation of the irregular shape of the patella, the patella clamp is a patella clamp which is provided with a first handle 100 and a second handle 200 as basic clamping structures, the first handle 100 and the second handle 200 are hinged and assembled with each other to form a structure which can be used for holding and can be controlled to be separated and combined, and an operator can control the separation and combination of the distal ends of the first handle 100 and the second handle 200 by holding the proximal ends of the first handle 100 and the second handle 200.

In order to satisfy the irregular shape of the patella, the first and second brackets 300 and 400 are designed to be parallel to each other during the movement of the distal ends of the first and second handles 100 and 200 separating and combining with each other, and the first and second brackets 300 and 400 are parallel to each other to form a stable grip on the patella, thereby facilitating various surgical operations related to the patella.

In order to always keep the first and second brackets 300 and 400 parallel, first, the proximal end of the first bracket 300 is hinged to the distal end of the first handle 100 to match the arcuate movement of the first handle 100 relative to the second handle 200 in the separation and merger of the distal ends of the first and second handles 100 and 200, and the second bracket 400 is also hinged to the second handle 200 to match the arcuate movement of the second handle 200 relative to the first handle 100 in the separation and merger of the distal ends of the first and second handles 100 and 200, so that the first and second brackets 300 and 400 can make a rotational movement relative to the first and second handles 100 and 200 in the separation and merger of the distal ends of the first and second handles 100 and 200, and the first and second brackets 300 and 400 can be moved toward and away from each other.

Further, the guide 500 provided on the first bracket 300 defines a first guide track, which can be a basis for movement, for the second bracket 400, the first guide track being perpendicular to the first bracket 300, when the second carriage 400 moves along the first guide track, it is possible to achieve a moving state substantially close to or away from the first carriage 300, in order to keep the second bracket 400 parallel to the first bracket 300 during the approaching or departing movement of the second bracket 400 relative to the first bracket 300, the proximal end of the second bracket 400 is movably connected to the first handle 100, the movable connection between the second bracket 400 and the first handle 100 can form a moving support for the second bracket 400 by using the first handle 100, so that when the second bracket 400 approaches or departs relative to the first bracket 300, the second bracket 400 can be always maintained in a state of being parallel to the first bracket 300 by the movable support of the first handle 100.

Therefore, as long as an operator operates the proximal ends of the first handle 100 and the second handle 200, the proximal ends of the first handle 100 and the second handle 200 are controlled to be separated and combined, so that the distal ends of the first handle 100 and the second handle 200 can be driven to be separated and combined through the hinged assembly relationship of the first handle 100 and the second handle 200, and then the distal ends of the first handle 100 and the second handle 200 can drive the first bracket 300 and the second bracket 400 to approach or separate from each other in a relatively parallel state according to the principle.

Furthermore, as can be seen from the above, the whole patella clamp has a very simple structure and low manufacturing cost, and can be produced in batch by using a linear cutting process or a common machining process, the first bracket 300 and the second bracket 400 always clamp the patella in a parallelogram (mutual parallel) moving mode, so that the accuracy of the osteotomy amount and the positioning accuracy of the patella mounting position hole can be ensured, because the first bracket 300 and the second bracket 400 move in parallel, the thickness of the patella after osteotomy can be ensured to be uniform, the axial line of the mounting hole drilled on the surface after osteotomy can also be ensured to be perpendicular to the osteotomy surface, a better fit osteotomy surface after patella prosthesis is mounted is ensured, the guide piece 500 for controlling the first bracket 300 and the second bracket 400 and the related assembly structure thereof are simple and compact, the operation by a doctor with one hand is facilitated, and the storage space of the patella clamp in the instrument box is saved.

The hinge assembly between the distal end of the second handle 200 and the second bracket 400 may be assembled by a direct hinge assembly, or may be assembled by an indirect hinge assembly through other components, for example, the distal end of the second handle 200 is hinged to the second bracket 400 through the hinge 410, the hinge 410 is not limited to various structural shapes such as a column, a block, etc., as long as the hinge assembly between the distal end of the second handle 200 and the second bracket 400 can be achieved, the hinge 410 is slidably assembled with the guide 500 along the first guide track in addition to the hinge assembly between the distal end of the second handle 200 and the second bracket 400, the second bracket 400 is slidably assembled with the guide 500 through the hinge 410, and the second bracket 400 is actually and indirectly slidably assembled with the guide 500 through the hinge 410, therefore, the position of the second bracket 400 hinged to the distal end of the second handle 200 can also be used as the position of the second bracket 400 slidably assembled along the guide 500, and the position of the second bracket 400 hinged to the distal end of the second handle 200 and the position of the second bracket 400 slidably assembled with the guide 500 are combined into a whole, and of course, the position of the second bracket 400 hinged to the distal end of the second handle 200 and the position of the second bracket 400 slidably assembled with the guide 500 can also be respectively located at different positions of the second bracket 400 according to design requirements, which is not limited thereto and can be selected by those skilled in the art according to requirements.

The first guiding track may be formed in the form of a track, a guiding groove, a guiding hole, and the like, for example, the guiding element 500 is provided with a first linear sliding hole 420, the first linear sliding hole 420 is configured to form the first guiding track, at this time, the hinge element 410 may be a columnar structure such as a pin, for example, a first pin shaft is adopted, the first pin shaft passes through the first linear sliding hole 420 and is slidably assembled with the guiding element 500, the distal end of the second handle 200 has a slot, a partial structure of the second bracket 400 is accommodated in the slot and is hinged with the second handle 200 through both ends of the first pin shaft, at this time, the central region of the first pin shaft is limited in the first linear sliding hole 420 to form a stable sliding assembly structure, and the central region of the first pin shaft can also rotate in the first linear sliding hole 420, so that the position on the second bracket 400 hinged with the distal end of the second handle 200 and the position on the second bracket 400 hinged with the guiding element 500 on the second bracket 400 are realized The assembly positions are combined into one, and in addition, the second bracket 400 and the second handle 200 are hinged at two ends of the first pin shaft, so that stable assembly can be formed among the second bracket 400, the second handle 200 and the guide piece 500.

For the movable connection between the second bracket 400 and the first handle 100, a movable support capable of matching the movement of the second bracket 400 is required, the proximal end of the second bracket 400 has a sliding rail portion 430, the sliding rail portion 430 has a second guiding track, the first handle 100 has a sliding connection portion 440 thereon, the sliding connection portion 440 is located in the proximal direction of the hinged position of the first handle 100 and the second handle 200, the sliding connection portion 440 is slidably assembled with the sliding rail portion 430 along the second guiding track, which allows the second bracket 400 to at least realize linear movement relative to the first handle 100, and simultaneously, the sliding connection portion 440 can also rotate relative to the sliding rail portion 430, which allows the second bracket 400 to provide a rotation function on the basis of the linear movement relative to the first handle 100, and by utilizing the linear movement and the rotation movement functions of the second bracket 400 relative to the first handle 100, complex and predetermined movements of the second bracket 400 relative to the first handle 100 may be allowed to satisfy the movable support of the second bracket 400 by the first handle 100.

For the second bracket 400 to have both the linear motion function and the rotational motion function relative to the first handle 100, a matching manner of a sliding hole and a pin may also be adopted, for example, the sliding rail portion 430 is provided with a second linear sliding hole 450, the second linear sliding hole 450 is configured to form the second guide track, the sliding connection portion 440 is a second pin disposed on the first handle 100, and the second pin passes through the second linear sliding hole 450 to be movably assembled with the sliding rail portion 430, so that a partial region of the second pin may be limited to form a stable sliding assembly structure in the second linear sliding hole 450, and a partial region of the second pin may also rotate in the second linear sliding hole 450. Of course, in addition to this, the function of the second bracket 400 having both linear motion and rotational motion relative to the first handle 100 may also be implemented by other structures, specifically, the second guide track may be formed by a track, a guide groove, a guide hole, and the like, and the rotational motion of the second bracket 400 relative to the first handle 100 may be implemented by assembling other rotating shaft components.

The sliding range of the second bracket 400 on the first guide track may be determined by the length of the first guide track itself, or may be defined on the first guide track by other matching structures, so that when the sliding range of the second bracket 400 on the first guide track is defined on the first guide track by other matching structures, the sliding range is less than or equal to the length of the first guide track itself, for example, the patella clamp further includes a locking member 600, the locking member 600 is movably fitted on the guide member 500, and the locking member 600 is configured to limit the sliding range of the second bracket 400 along the first guide track.

In one embodiment, the guide member 500 is a rod-shaped member, the outer wall of the guide member 500 has an external thread 510, the locking member 600 is a nut, and the nut is assembled with the external thread 510 and is located at a specific position of the first guide track when the nut axially moves on the external thread 510 by rotating relative to the thread, so that a limit is formed at the specific position, and the second bracket 400 cannot move along the remaining distance of the first guide track after contacting the nut, which limits the sliding range of the second bracket 400 by the nut. The outer wall of the nut can be provided with concave or convex parts which are suitable for being held by human fingers or matching characteristics of the combination of the concave or convex parts, and the comfortable feeling of the operation of a doctor can be improved by matching with the holding of the human fingers.

Wherein the external thread 510 is a double-lead thread, the double-lead thread can realize the rapid rotation of the nut, thereby facilitating the rapid operation of the doctor and saving the operation time, the external thread 510 only occupies a partial section of the length direction of the guide 500, if the axial length of the external thread 510 is shorter than the length of the guide 500, the external thread 510 of the guide 500 is configured as a non-full thread, which may be segmented or full-length, however, the total length of the external thread is shorter than that of the guide 500 even in the segmentation process, so that the structure of the shorter external thread 510 can meet the thread assembly of the nut, the structure of the locking member 600 can be simpler due to the reduction of the processing of the threads, a gap can be formed between the locking member 600 and the nut due to the unthreaded section on the locking member 600, and the gap is favorable for more thorough cleaning and sterilization and reduces the risk of patient infection in the operation.

Since the nut needs to rotate along the external threads 510 to realize its linear movement, the nut has a risk of being unscrewed from the locking member 600, which will result in a failure of the limiting effect of the nut, and therefore, the patella jig further includes a limiting member 700, the limiting member 700 is disposed on the guide member 500, and the limiting member 700 is configured to be in limiting engagement with the locking member 600 to limit the locking member 600 from being separated from the guide member 500. The locating part 700 can be any structure such as a pin, and the pin sets up through the activity and forms the stopping to the nut on retaining member 600, can't continue to remove along external screw thread 510 when making the nut touch the pin, and the pin can be pegged graft on the top of retaining member 600 usually, can not break away from retaining member 600 when guaranteeing that the nut moves the extreme position of retaining member 600.

In order to cooperate with the clamping of the patella, the distal end of the first bracket 300 has a supporting portion 310, the supporting portion 310 is provided with a spike 320 facing the second bracket 400, the spike 320 can be used to fix the patella, the distal end of the second bracket 400 is provided with a replacing structure 460, the replacing structure 460 is configured at least to be used for detachably installing an osteotomy plate, a perforation guide or a prosthesis installer, so that various components such as the osteotomy plate, the perforation guide or the prosthesis installer which are needed can be replaced by the replacing structure 460 when various operations are performed on the patella, the patella clamp can perform various operations on the patella when different components are replaced, the replacing structure 460 can adopt a clamping structure, an adhesion structure, an insertion structure and the like, for example, as shown in fig. 4, the replacing structure 460 is a slot at the distal end of the second bracket 400, and the osteotomy plate, the perforation guide or the insertion slot can be realized by the slot, The quick plug switching of prosthesis erector etc. realizes that a pincers is multi-purpose, effectively saves cost.

When the patella cutting device is used, the nut can be rotated to separate the first handle 100 from the second handle 200, the bone cutting plate is inserted into the inserting groove of the second bracket 400, the nut is screwed to perform bone cutting operation after the patella is clamped, the punching guide is inserted into the inserting groove of the second bracket 400 after bone cutting is completed, the nut is screwed to perform patella punching, finally, the prosthesis installer can be inserted into the inserting groove of the second bracket 400 to perform prosthesis installation, and if other operations are required to be performed on the patella, corresponding auxiliary components can be inserted into the inserting groove of the second bracket 400.

The patella clamp also includes a spring 800, the spring 800 disposed between the first handle 100 and the second handle 200, the spring 800 configured to apply a spring force urging the first handle 100 and the second handle 200 apart. The elastic member 800 may be formed by two elastic pieces arranged in a crossed manner, and may be fixed to the first handle 100 and the second handle 200 by fixing members such as screws, and the like, and meanwhile, a damping function may be integrated between the two elastic pieces, so that the first handle 100 and the second handle 200 may be automatically flicked away from each other, thereby facilitating the holding operation of an operator with one hand.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only represent some embodiments of the present invention, and the description thereof is specific and detailed, but not to be construed as limiting the scope of the present invention. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.

Claims (10)

1. A patellar clamp, comprising:

the first handle and the second handle are mutually hinged and assembled;

a first bracket, a proximal end of the first bracket being hinged to a distal end of the first handle;

the guide piece is fixed on the first bracket and provided with a first guide track, and the first guide track is perpendicular to the first bracket;

a second bracket, a distal end of the second handle being hinged to the second bracket, the second bracket being slidably mounted to the guide along the first guide track, and a proximal end of the second bracket being movably coupled to the first handle to maintain the second bracket parallel to the first bracket as the second bracket rotates relative to the second handle and slides relative to the guide.

2. The patellar clip according to claim 1, wherein the distal end of the second handle is hingedly connected to the second bracket by a hinge, the hinge slidably fits with the guide along the first guide track, and the second bracket is indirectly slidably fits with the guide by the hinge.

3. The patella clamp according to claim 2, wherein the guide member defines a first linear slide hole configured to define the first guide track, the hinge member is a first pin passing through the first linear slide hole to slidably fit with the guide member, the distal end of the second handle has a slot, and a portion of the second bracket is received in the slot and is hinged to the second handle via two ends of the first pin.

4. The patellar clip according to claim 1, wherein the proximal end of the second bracket has a slide track portion having a second guide track, the first handle has a slip portion thereon located proximally of the location of articulation of the first and second handles, the slip portion slidably fitting with the slide track portion along the second guide track and being rotatable relative to the slide track portion.

5. The patellar clamp according to claim 4, wherein the rail portion defines a second linear slide hole configured to form the second guide track, the sliding connection portion is a second pin disposed on the first handle, and the second pin passes through the second linear slide hole and is movably assembled with the rail portion.

6. The patellar clamp according to claim 1, further comprising:

a retaining member movably mounted on the guide member, the retaining member configured to limit a range of sliding of the second bracket along the first guide track.

7. The patella clamp according to claim 6, wherein the guide member is a rod-shaped member, the outer wall of the guide member has external threads, and the locking member is a nut that is fittingly coupled to the external threads.

8. The patellar clamp according to claim 6, further comprising:

the limiting part is arranged on the guide part and is configured to be in limiting fit with the locking part so as to limit the locking part to be separated from the guide part.

9. The patellar clip according to any of claims 1-8, wherein the distal end of the first bracket has a bearing portion with a spike disposed thereon in a direction toward the second bracket;

and/or, the distal end of the second bracket is provided with a tamper structure configured at least for removably mounting an osteotomy plate, a punch guide, or a prosthetic mount.

10. The patellar clamp according to any of claims 1-8, further comprising:

a resilient member disposed between the first handle and the second handle, the resilient member configured to apply a resilient force to the first handle and the second handle urging the two apart.

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