Manual cartilage defect modeling instrument capable of easily taking out cartilage

Abstract

The utility model discloses a cartilage defect manual modeling instrument capable of easily taking out cartilage, and relates to the technical field of medical instruments. The cartilage defect manual modeling instrument capable of easily taking out cartilage comprises a trephine, the bottom of the trephine is provided with sawteeth, the trephine is used for transferring a hose for modeling, and the top end of the trephine is of a prismatic structure; the handle is detachably installed at the top end of the trephine and used for manually rotating the trephine to conduct drilling operation; the positioning structure is mounted outside the trephine in a sleeving manner and can be fixed at any height; according to the cartilage modeling instrument, by means of the mode that the trephine and the handle are spliced, operation of manual drilling and cartilage taking is achieved, the structure is simple, use is convenient, the handle can be folded to be stored after being turned over, a T-shaped instrument is transformed into a linear structure, the occupied space is reduced, the trephine can be independently replaced after being used for a long time and abraded, and the operation is convenient. Other structures can be repeatedly used, the cost is reduced, the drilling depth can be controlled through the positioning structure, and use is flexible and easy.

Description

Technical Field

[0001] The utility model relates to the technical field of medical instruments, in particular to a manual modeling instrument for cartilage defect that can easily take out cartilage. Background Technique

[0002] The repair of cartilage injury is an important research content in the field of sports medicine. The motor ability and daily life of patients with cartilage injury will be affected to varying degrees. Existing treatment programs cannot generate normal hyaline cartilage at the defect site. Therefore, how to better repair cartilage injury has become a hot topic in the field of sports medicine.

[0003] Animal models are necessary processes before various treatment programs and surgical procedures enter the clinic. They can simulate diseases in clinics, compare the differences in the effects of various treatment programs, and evaluate the safety of drugs / materials in vivo. Before new treatment programs for cartilage injury enter the clinic, it is necessary to verify the effects and biological safety in animals.

[0004] For the preparation of existing cartilage defect models, tools such as trephines and electric drills are mostly used to drill holes on the articular surface of the trochlea of the femur. After modeling with the trephine of these devices, due to the hollow design in the front, the removed cartilage plug is stuck in the pipeline and is not easy to take out. It is necessary to remove the trephine and carefully take out the cartilage plug. If not careful, the cartilage plug is easily damaged, thus affecting the modeling efficiency of the cartilage defect model. Content of the Utility Model

[0005] In view of the deficiencies of the prior art, the utility model provides a manual modeling instrument for cartilage defect that can easily take out cartilage, and solves the problems.

[0006] To achieve the above purposes, the utility model is realized through the following technical solutions: A manual modeling instrument for cartilage defect that can easily take out cartilage, including:

[0007] A trephine, with sawteeth provided at the bottom for taking out cartilage plugs for modeling, and the top end of the trephine is set as a prismatic structure;

[0008] A handle, detachably installed at the top end of the trephine for manually rotating the trephine for drilling operation;

[0009] A positioning structure, sleeved on the outside of the trephine and can be fixed at any height for controlling the drilling depth of the trephine;

[0010] A push rod, axially slidably arranged in the trephine for pushing out the cartilage in the trephine;

[0011] The handle is of a foldable design, including:

[0012] A U-shaped sleeve, with a prismatic hole provided at the center and sleeved on the prismatic structure at the top end of the trephine;

[0013] There are two folding handles, one end of each is rotatably connected to one side inside the U-shaped sleeve, and a hand-tightening bolt threadedly penetrates through the end of the folding handle away from the U-shaped sleeve.

[0014] When in use, the opening of the U-shaped sleeve faces upward and is sleeved on the top of the trephine, and the two folding handles on both sides are unfolded and are linear with the U-shaped sleeve; when not in use, the opening of the U-shaped sleeve faces downward and is sleeved on the top of the trephine, and the two folding handles on both sides droop and fit against the side of the trephine for storage.

[0015] Preferably, positioning seats are provided on both sides of the trephine. When the two folding handles droop naturally, they fit against the positioning seats, and screw holes adapted to the hand-tightening bolts are correspondingly formed inside the positioning seats and on the side wall of the trephine.

[0016] Preferably, when the folding handle droops and fits against the side of the positioning seat for fixation, the hand-tightening bolt penetrates through the folding handle, the positioning seat and the side wall of the trephine for fixation. At the same time, the hand-tightening bolt abuts and fixes the ejector rod to fix the ejector rod.

[0017] Preferably, a rubber coating is provided on the surface of the middle section of the ejector rod to increase the friction force after being abutted by the hand-tightening bolt.

[0018] Preferably, the positioning structure includes a sleeve slidably sleeved outside the trephine, and a positioning bolt threadedly penetrates through the side of the sleeve. A plurality of ball bearings are evenly distributed in a circumferential direction at the bottom of the sleeve.

[0019] Preferably, a scale line indicating the height of the positioning structure is engraved on the bottom end of the side of the trephine, and anti-slip rubber strips for increasing the friction force of the positioning bolt are also embedded on both sides of the trephine.

[0020] The utility model provides a manual cartilage defect modeling instrument for easily extracting cartilage. Compared with the prior art, it has the following beneficial effects:

[0021] 1. For the manual cartilage defect modeling instrument for easily extracting cartilage, this cartilage modeling instrument realizes the operation of manually drilling to extract cartilage through the splicing method of the trephine and the handle. The structure is simple and easy to use. After the handle is flipped, it can be folded for storage, deforming the T-shaped instrument into a linear structure, reducing the occupied space. After the trephine is worn after long-term use, it can be replaced separately, and other structures can be reused, reducing the cost. The positioning structure can also be used to control the drilling depth, and the use is flexible and simple.

[0022] 2. For the manual cartilage defect modeling instrument for easily extracting cartilage, by providing positioning seats on both sides of the trephine, it can be ensured that when the trephine is stored on the side of the trephine, the hand-tightening bolt can be screwed in vertically to the trephine, realizing the positioning effect. At the same time, after the hand-tightening bolt is screwed in, the ejector rod can be fixed synchronously, thereby preventing it from slipping out and being lost randomly. One operation realizes the storage and fixation of the overall structure, and the use is convenient.

[0023] 3. The manual modeling instrument for cartilage defect with easy cartilage extraction, the positioning structure can adjust the height outside the trephine, and then can limit the depth of cartilage extraction by the trephine, meeting different cartilage modeling requirements. And ball bearings are arranged at the bottom of the sleeve. During the process of the trephine driving the positioning structure to rotate, the sliding friction is changed into rolling friction by using the ball bearings, which can reduce the wear on the bone surface. Description of the Drawings

[0024] Figure 1 It is a schematic diagram of the using state of the present utility model;

[0025] Figure 2 It is a schematic diagram of the storage state of the present utility model;

[0026] Figure 3 It is a schematic diagram of the ejector rod of the present utility model;

[0027] Figure 4 It is a partial cross-sectional view of the positioning structure of the present utility model.

[0028] In the figure: 1 - trephine, 11 - positioning seat, 12 - anti-slip rubber strip;

[0029] 2 - handle, 21 - U-shaped sleeve, 22 - prism hole, 23 - folding handle, 24 - hand-tightening bolt;

[0030] 3 - positioning structure, 31 - sleeve, 32 - positioning bolt, 33 - ball bearing;

[0031] 4 - ejector rod, 41 - rubber coating. Detailed Embodiments

[0032] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0033] Refer to Figures 1 - 4 , the present utility model provides three technical solutions:

[0034] The first embodiment: A manual modeling instrument for cartilage defect with easy cartilage extraction, comprising:

[0035] A trephine 1, with sawteeth provided at the bottom for rotating and extracting flexible tubes for modeling, and the top end of the trephine 1 is set as a prism-shaped structure. The outer diameter of the top end of the trephine 1 is 8 mm, the inner diameter is 6 mm. The bottom end of the trephine 1 is tapered inwards, and the outer diameter of the bottom end is 6 mm, the inner diameter is 4 mm, and the height of the tapered part is 10 mm;

[0036] A handle 2, detachably installed at the top end of the trephine 1 for manually rotating the trephine 1 to perform drilling operations;

[0037] A positioning structure 3, sleeved and installed outside the trephine 1 and fixable at any height for controlling the drilling depth of the trephine 1;

[0038] An ejector rod 4, axially slidably arranged inside the trephine 1 for ejecting the cartilage inside the trephine 1;

[0039] The handle 2 is of a foldable design and includes:

[0040] A U-shaped sleeve 21, with a prism hole 22 provided at the center and sleeved outside the prism-shaped structure at the top end of the trephine 1;

[0041] Folding handles 23, two of them are provided, and one end of each is rotatably connected to one side inside the U-shaped sleeve 21, and a hand-tightening bolt 24 threadedly penetrates through the end of the folding handle 23 away from the U-shaped sleeve 21;

[0042] When the handle 2 is in use, the U-shaped sleeve 21 has its opening facing upward and is sleeved at the top end of the trephine 1, and the two folding handles 23 on both sides are unfolded and in a linear shape with the U-shaped sleeve 21; when the handle 2 is not in use, the U-shaped sleeve 21 has its opening facing downward and is sleeved at the top end of the trephine 1, and the two folding handles 23 on both sides droop and fit against the side surface of the trephine 1 for storage.

[0043] This cartilage modeling instrument realizes the operation of manually drilling and taking cartilage by splicing the trephine 1 and the handle 2. It has a simple structure and is convenient to use. After flipping the handle 2, it can be folded for storage, changing the T-shaped instrument into an I-shaped structure, reducing the occupied space. When the trephine 1 is worn after long-term use, it can be replaced separately, and other structures can be reused, reducing the cost. The positioning structure 3 can also be used to control the drilling depth, and it is flexible and simple to use.

[0044] The second implementation mode is mainly different from the first implementation mode in that: positioning seats 11 are provided on both sides of the trephine 1. When the two folding handles 23 droop naturally, they fit against the positioning seats 11, and screw holes adapted to the hand-tightening bolt 24 are correspondingly opened inside the positioning seats 11 and on the side wall of the trephine 1. When the folding handle 23 droops and fits against the side surface of the positioning seat 11 for fixation, the hand-tightening bolt 24 penetrates through the folding handle 23, the positioning seat 11 and the side wall of the trephine 1 for fixation. At the same time, the hand-tightening bolt 24 tightly presses and fixes the ejector rod 4 to fix the ejector rod 4. A rubber coating 41 is provided on the surface of the middle section of the ejector rod 4 to increase the friction force after being touched by the hand-tightening bolt 24. The outer diameter of the rubber coating 41 is not greater than the maximum diameter of the ejector rod 4, so that the ejector rod 4 slides axially more smoothly.

[0045] By arranging positioning seats 11 on both sides of the trephine 1, it can ensure that when the trephine 1 is received on the side of the trephine 1, the hand-tightening bolt 24 can be screwed into the trephine 1 vertically, achieving the positioning effect. At the same time, after the hand-tightening bolt 24 is screwed in, it can also fix the ejector rod 4 synchronously, thereby preventing it from slipping out and being lost randomly. One operation realizes the storage and fixation of the overall structure, which is convenient to use.

[0046] The third implementation mode is mainly different from the first implementation mode in that: the positioning structure 3 includes a sleeve 31 slidably sleeved outside the trephine 1, and a positioning bolt 32 penetrates through the side of the sleeve 31 in a threaded manner. A plurality of balls 33 are circumferentially distributed at the bottom of the sleeve 31. A scale line indicating the height of the positioning structure 3 is engraved at the bottom end of the side of the trephine 1. The value of the scale line is the actual height of the line relative to the bottom end of the trephine 1 minus the height of the balls 33 exceeding the sleeve 31. That is, the actual value of the scale line corresponding to the sleeve 31 is the height difference between the balls 33 and the bottom end of the trephine 1. Anti-slip rubber strips 12 for increasing the friction of the positioning bolt 32 are also embedded on both sides of the trephine 1.

[0047] The positioning structure 3 can adjust the height outside the trephine 1, thereby restricting the depth of cartilage drilling by the trephine 1 and meeting different cartilage modeling requirements. By arranging the balls 33 at the bottom of the sleeve 31, during the process of the trephine 1 driving the positioning structure 3 to rotate, the sliding friction is changed to rolling friction by the balls 33, which can reduce the wear on the bone surface.

[0048] At the same time, the content not described in detail in this specification belongs to the prior art well-known to those skilled in the art.

[0049] When in use, open the U-shaped sleeve 21 of the handle 2 upward, then put it on the top end of the trephine 1, then unfold the folding handle 23 to the horizontal, then loosen the positioning bolt 32 of the positioning structure 3, look at the bottom end of the sleeve 31 horizontally, observe the scale line to adjust the height of the positioning structure 3, and then tighten the positioning bolt 32 for fixation; then you can start to hold the handle 2 and drive the trephine 1 to rotate to drill the cartilage. The drilled cartilage is stuck in the trephine 1, and at the same time, the top end of the ejector rod 4 will be pushed out of the trephine 1. After pulling out the trephine 1, hold the trephine 1 and press the ejector rod 4 to push out the cartilage.

[0050] When not in use, pull out the handle 2 and turn it 180 degrees downward, then put it on the trephine 1. Then let the folding handle 23 hang down and fit against the positioning seat 11, and then tighten the hand-tightening bolt 24 so that it screws into the trephine 1 to press the ejector rod 4 tightly.

[0051] It should be noted that in this text, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "including" or any other variant thereof are intended to cover non-exclusive inclusion, such that a process, method, article or device comprising a series of elements not only includes those elements but also includes other elements not expressly listed, or elements inherent to such process, method, article or device.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manual cartilage defect modeling device for easily removing cartilage, characterized in that: include: The trephine has serrations at the bottom for taking out the hose for molding, and the top of the trephine is set as a prismatic structure; A handle, which is detachably mounted on the top of the trephine and is used to manually rotate the trephine for drilling operations; The positioning structure is installed on the outside of the trephine and can be fixed at any height to control the drilling depth of the trephine; An ejector rod is axially slidably disposed in the trephine and is used to push out the cartilage in the trephine; The handle is foldable and includes: The U-shaped sleeve has a prismatic hole at its center which is sleeved outside the prismatic structure at the top of the trephine; Two folding handles are provided, and one end of each folding handle is rotatably connected to one side of the inside of the U-shaped sleeve, and a hand-tightening bolt is threadedly penetrated at one end of the folding handle away from the U-shaped sleeve; When the handle is in use, the U-shaped sleeve opens upward and is sleeved on the top of the trephine, and the foldable handles on both sides are unfolded to be in line with the U-shaped sleeve; when the handle is not in use, the U-shaped sleeve opens downward and is sleeved on the top of the trephine, and the foldable handles on both sides are drooped and fit to the sides of the trephine for storage.

2. A manual cartilage defect modeling device for easy removal of cartilage according to claim 1, characterized in that: Positioning seats are arranged on both sides of the trephine. The folding handles on both sides are fitted into the positioning seats when they are naturally drooped, and screw holes adapted to hand-tightened bolts are opened inside the positioning seats and correspondingly on the side walls of the trephine.

3. A manual cartilage defect modeling device for easy removal of cartilage according to claim 2, characterized in that: When the folding handle is drooped and attached to the side of the positioning seat for fixing, the folding handle, the positioning seat and the side wall of the trepanation are fixed by means of a hand-tightening bolt, and at the same time, the hand-tightening bolt is pressed against the fixed ejector rod to fix the fixed ejector rod.

4. A manual cartilage defect modeling device for easy removal of cartilage according to claim 3, characterized in that: The surface of the middle section of the ejector rod is provided with a rubber coating to increase the friction force after the hand-tightened bolt hits.

5. The manual cartilage defect modeling device for easy removal of cartilage according to claim 1, characterized in that: The positioning structure comprises a sleeve which is slidably sleeved on the outside of the trephine, and a positioning bolt is penetrated through the side thread of the sleeve, and a plurality of balls are evenly distributed in the circumferential direction on the bottom of the sleeve.

6. A manual cartilage defect modeling device for easy removal of cartilage according to claim 5, characterized in that: The bottom end of the side of the trephine is engraved with a scale line indicating the height of the positioning structure, and both sides of the trephine are embedded with anti-skid rubber strips to increase the friction of the positioning bolts.

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