CN110940553B - Femoral head cartilage sampler for electric experiment - Google Patents

Abstract

The invention relates to a femoral head cartilage sampler for an electric experiment, which effectively solves the problems of low efficiency and low sample quality of the conventional femoral head cartilage artificial sampling; the technical scheme for solving the problem is that the scraper device comprises a main body shell, wherein a fixing cylinder which is through up and down is rotationally connected in the main body shell, and a scraper is fixedly connected in the fixing cylinder; the upper end of the main body shell is connected with an outer adjusting sleeve in a left-right sliding mode, the outer adjusting sleeve can be adjusted in position and fixed through a combined nut meshed with external threads of the outer adjusting sleeve, an inner pressing sleeve is meshed with internal threads of the outer adjusting sleeve, and the lower end of the inner pressing sleeve is coaxially and integrally connected with a flexible clamping port; the bottom surface of the fixed cylinder is provided with an annular through hole surrounding the scraper; a vent hole is formed in one side of the supporting cylinder, and a fan fixedly connected in the main body shell is arranged in the vent hole; compared with the traditional sampling process, the method can shorten the sampling time, improve the quality of cartilage, increase the success rate of subsequent experiments, and has strong practicability.

Description

An electric experimental femoral head cartilage sampling machine

technical field

The invention relates to the technical field of sampling tools for medical experiments, in particular to a femoral head cartilage sampling machine for electric experiments.

Background technique

The femoral head is an important source of experimental cartilage materials. However, the acquisition of femoral head cartilage has always been a difficult point in experiments. At this stage, we do not have special equipment for obtaining cartilage. Although the experimental cartilage is very valuable, the efficiency and quality of the material are relatively low. This led to the failure of subsequent experiments and the slow progress of the experiments. At present, it takes several hours to take a single cartilage, and the obtained cartilage tissue has low activity and low cell content, and the failure rate of subsequent experiments is high.

Therefore, the present invention provides an electric experimental femoral head cartilage sampling machine to solve this problem.

SUMMARY OF THE INVENTION

In view of the above situation, in order to overcome the defects of the prior art, the present invention provides an electric experiment femoral head cartilage sampling machine, which effectively solves the problems of low efficiency and low sample quality of the current femoral head cartilage manual sampling.

The present invention comprises a main body casing, wherein a fixed cylinder which is transparent up and down is rotatably connected in the main casing, and a scraper is fixedly connected in the fixed cylinder;

The upper end of the main body shell is slidably connected with an outer adjustment sleeve, the outer adjustment sleeve can be adjusted and fixed by the combination nut engaged with its outer thread, and the inner thread of the outer adjustment sleeve is engaged with an inner compression sleeve. a sleeve, the lower end of the inner pressing sleeve is coaxially integrally connected with a flexible clamping port;

The bottom surface of the fixed cylinder is provided with an annular through hole surrounding the scraper;

A support cylinder is fixedly connected to the inner bottom surface of the main body shell, a ventilation hole is opened on one side of the support cylinder, and the ventilation hole is provided with a fan fixedly connected in the main body shell;

The upper end of the main body shell is provided with a stakeout opening, an arc-shaped slide rail fixedly connected with the main body shell is arranged above the stake-out opening, and the outer adjustment sleeve is slidably connected in the arc-shaped slide rail;

The combined nut comprises a lower nut detachably sleeved on the lower end of the outer adjusting sleeve and an upper nut threadedly sleeved outside the outer adjusting sleeve, and the upper nut is located above the lower nut;

The arc-shaped slide rail is formed by two arc-shaped plates that are fixedly connected on both sides of the stakeout opening, and the outer adjusting sleeve is placed between the two arc-shaped plates; the upper nut is placed above the arc-shaped plate, and the lower nut is placed on the arc plate. Below the curved plate.

Preferably, a washer sleeved outside the outer adjusting sleeve is provided below the upper nut and above the lower nut.

Preferably, the lower end of the outer adjusting sleeve is integrally connected with a clamping wedge ring, the inner wall of the clamping wedge ring is an inclined surface, and the inner diameter of the upper end face of the clamping wedge ring is larger than the inner diameter of the lower end face;

The outer side wall of the clamping port is an inclined surface and can fit with the inner wall of the clamping wedge ring;

The side wall of the clamping opening is provided with a moving through groove.

Preferably, the fixed cylinder is rotatably connected in the support cylinder, and the fixed cylinder is connected with the drive motor fixedly connected in the main body shell.

Preferably, the support sleeve is provided with a ball bearing, the inner ring of the ball bearing is fixedly connected to the support sleeve, and the outer ring of the ball bearing is fixedly connected to the fixed cylinder;

The outer side wall of the outer ring of the ball bearing is evenly and fixedly connected with a plurality of teeth, and the output shaft of the driving motor is coaxially and fixedly connected with a driving gear, which meshes with the teeth of the outer ring of the ball bearing.

Preferably, the lower end of the fixed cylinder is slidably connected with two oppositely arranged scraper lower seats, the two scraper lower seats are respectively fixedly connected with the scraper, and the upper end of the fixed cylinder is slidably connected with two oppositely arranged scraper lower seats. The scraper upper seat, the two scraper upper seats are respectively slidably connected with the two scrapers;

The back of the scraper is fixedly connected with an L-shaped plate with an opening facing the direction of the blade, and a wheel frame is extended on the back of the scraper along the direction of the blade, and a guide wheel is rotatably connected to the wheel frame. The lower edge of the wheel is higher than the blade;

The two upper scraper seats and the two lower scraper seats are connected to the fixing cylinder through springs.

Preferably, the lower end of the support cylinder is provided with a tray slidably connected in the main body shell.

The present invention makes improvements to the problems of low efficiency of artificial sampling of femoral head cartilage and low sample quality. The inner and outer sleeves are used to cooperate with the clamping wedge ring and the clamping port, so that the femoral head specimen can be clamped; The adjustment of the specimen position can not only adjust the cutting depth to avoid the contamination of the subchondral bone, but also adjust the angle of the swinging femoral head specimen, change the cutting position, and complete the sampling requirements at different positions; the scraper is set to a flexible metal material, which can make the scraper tightly It fits the surface of the specimen and cuts better; the present invention can electrically complete the acquisition of cartilage tissue for experiments. Compared with the traditional sampling process, the present invention can shorten the sampling time, improve the quality of cartilage, increase the success rate of subsequent experiments, and has strong practicability.

Description of drawings

FIG. 1 is a schematic perspective view of the present invention.

FIG. 2 is a schematic front view of the present invention.

3 is a schematic top view of the present invention.

4 is a schematic cross-sectional view of the present invention.

FIG. 5 is a three-dimensional schematic diagram of the inner compression sleeve and related structures of the present invention.

FIG. 6 is a three-dimensional schematic diagram of the fixing cylinder and related structures of the present invention.

FIG. 7 is a schematic perspective view of the scraper of the present invention.

Detailed ways

The foregoing and other technical contents, features and effects of the present invention will be clearly presented in the following detailed description of the embodiments with reference to FIGS. 1 to 7 . The structural contents mentioned in the following embodiments are all referenced to the accompanying drawings.

Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.

Embodiment 1, the present invention is an electric experimental femoral head cartilage sampling machine, which is characterized in that it includes a main body shell 1, the main body shell 1 is a hollow shell, and the main body shell 1 is rotatably connected with upper and lower parts. A transparent fixing cylinder 2, a scraper 3 is fixedly connected in the fixing cylinder 2, and one end of the cartilage head of the femoral head can be placed beside the scraper 3 in the fixing cylinder 2, and the rotation of the fixing cylinder 2 drives the scraper 3 to rotate, thereby removing the cartilage tissue. cut off;

The upper end of the main body shell 1 is slidably connected with an outer adjustment sleeve 4, the outer adjustment sleeve 4 can be adjusted and fixed by the combination nut whose outer thread is engaged, and the inner thread of the outer adjustment sleeve 4 is engaged. There is an inner compression sleeve 5. After the outer adjustment sleeve 4 is fixed, the inner compression sleeve 5 can be moved up and down by rotating the inner compression sleeve 5. The lower end of the inner compression sleeve 5 is connected coaxially and integrally. There is a flexible clamping port 6, the femoral head can be placed in the inner compression sleeve 5, and the femoral head can be clamped through the clamping port 6. At this time, the cartilage head of the femoral head is located under the clamping port 6. It should be noted that , when the middle of the femoral head is clamped by the inner compression sleeve 5, the upper part of the femoral head is not suspended, and the upper part of the femoral head is still in contact with the inner side wall of the inner compression sleeve 5, and its function is to locate the femoral head, and the fixed femoral head The main force-bearing point is at the position where the clamping port 6 is clamped, and this setting can prevent the upper end of the femoral head from swinging after the clamping port 6 clamps the middle of the femoral head, resulting in unstable fixation;

The upper end of the main body shell 1 is provided with a lofting port 7, the cartilage head at the lower end of the femoral head is put into the fixing cylinder 2 through the lofting port 7, and an arc-shaped slide rail 8 fixedly connected with the main body shell 1 is arranged above the lofting port 7. , The arc-shaped slide rail 8 is slidably connected with the outer adjustment sleeve 4. Specifically, referring to FIG. 1 and FIG. 4, the arc-shaped slide rail 8 is fixedly connected to the stakeout port 7 by two The side arc-shaped plates are formed, and the outer adjusting sleeve 4 is placed between the two arc-shaped plates;

The combination nut includes a lower nut 10 detachably sleeved on the lower end of the outer adjustment sleeve 4 and an upper nut 9 threadedly sleeved outside the outer adjustment sleeve 4. The detachable connection method of the lower nut 10 is preferably a threaded connection. The upper nut 9 is located above the lower nut 10, the upper nut 9 is placed above the arc-shaped plate, and the lower nut 10 is placed under the arc-shaped plate;

The bottom surface of the fixing cylinder 2 is provided with an annular through hole 17 surrounding the scraper 3, the bottom surface of the fixing cylinder 2 is provided with an annular through hole 17 surrounding the scraper 3, and the inner bottom surface of the main body shell 1 is fixedly connected with a supporting cylinder 14. , the lower end of the support cylinder 14 is provided with a tray 18 which is slidably connected in the main body shell 1, and one end of the tray 18 can be placed in the support cylinder 14, below the fixed cylinder 2 and attached to the inner wall of the support cylinder 14, and the main body shell 1 is provided with There is an outlet through which the user can pull out the tray 18;

One side of the support cylinder 14 is provided with a ventilation hole 25, and the ventilation hole 25 is provided with a fan 26 fixedly connected in the main body shell 1. Specifically, referring to FIG. 4, the fan 26 is arranged between the opening and the support cylinder 14. During the time, when the fixed cylinder 2 rotates and drives the scraper 3 to rotate and cut, a vortex air flow will be generated due to the rapid rotation of the fixed cylinder 2, which is easy to cause the cutting tissue debris to rotate in the fixed cylinder 2 and will not fall, and when the fixed cylinder 2 stops rotating , there will still be a lot of tissue debris adhering to the inner wall of the fixed cylinder 2, the fan 26 sucks air under the annular through hole 17 of the fixed cylinder 2 and generates a negative pressure area, so that the tissue debris cut by the scraper 3 is adsorbed and moved along the As the airflow moves in the direction, the ventilation hole 25 is narrow, and the venturi effect makes the fan 26 generate a large airflow under the fixed cylinder 2, so that the negative pressure under the annular through hole 17 has a large suction force, and the airflow flows through the fixed cylinder. 2. After entering the main body shell 1, the open interior space of the main body shell 1 greatly reduces the wind power, so that the airflow will not take away the tissue debris. A number of small ventilation holes are opened on the side wall. In order to prevent the cut tissue debris from being scattered in the main body shell 1, a filter screen is detachably provided on the tray 18. The collected tissue debris can be collected, and at the same time, between the fan 26 and the support cylinder 14, a deflector inclined plate fixedly connected in the main body shell 1 is arranged, so as to facilitate the fan 26 to extract air from the ventilation hole 25;

In the specific use of this embodiment, the user can first unscrew the lower nut 10, take out the outer adjustment sleeve 4, and put the femoral head from below the outer adjustment sleeve 4 into the inner compression sleeve 5. At this time, the femoral head is One end of the cartilage head is facing down, then the inner compression sleeve 5 is rotated so that the compression port compresses the femoral head, and the outer adjustment sleeve 4 is placed in the arc-shaped slide rail 8. At this time, the upper nut 9 is clamped between the two arcs. Then, screw the lower nut 10 outside the outer adjusting sleeve 4, and adjust the positions of the lower nut 10 and the upper nut 9, so as to adjust the placement height of the cartilage head at the lower end of the femoral head, and then swing the outer adjusting sleeve 4 to adjust the femoral head. To determine the angle of bone cutting, tighten the lower nut 10 downward, and cooperate with the upper nut 9 to fix the outer adjusting sleeve 4 in the arc-shaped slide rail 8, and then only need to rotate the fixing cylinder 2 to cut the cartilage head at the lower end of the femoral head scraper 3. The scraped cartilage head tissue can directly fall on the tray 18 through the annular through hole 17, and then the user can pull out the tray 18.

Embodiment 2, on the basis of Embodiment 1, a washer 11 sleeved on the outside of the outer adjusting sleeve 4 is provided below the upper nut 9 and above the lower nut 10. The setting of the washer 11 can make the upper nut 9 and the lower nut 10 press the outer adjusting sleeve 4 on the arc-shaped slide rail 8 more firmly.

Embodiment 3, on the basis of Embodiment 1, the lower end of the outer adjusting sleeve 4 described with reference to FIG. 4 is integrally connected with a clamping wedge ring 12 coaxially, and the inner wall of the clamping wedge ring 12 is an inclined surface and clamps The inner diameter of the upper end surface of the wedge-shaped ring 12 is larger than the inner diameter of the lower end surface, so that the inner wall of the clamping wedge-shaped ring 12 is an inclined surface whose upper end is inclined away from the center of the circle;

Referring to FIG. 5 , the outer side wall of the clamping port 6 is an inclined surface and can fit with the inner wall of the clamping wedge ring 12 , and the side wall of the clamping port 6 is provided with a moving through groove 13 , which can be rotated within the user's rotation. When the sleeve 5 is pressed to move downward, the inner wall side of the clamping wedge ring 12 will press the clamping port 6 to tighten inwardly, thereby clamping the femoral head. If the clamping port 6 is a complete ring, then It is not easy to be compressed to the inside, and the opening of the moving through groove 13 enables the clamping port 6 to better clamp the femoral head.

Embodiment 4, on the basis of Embodiment 1, the fixed cylinder 2 is rotatably connected in the support cylinder 14, the fixed cylinder 2 is connected with the drive motor 15 fixedly connected in the main body shell 1, and the drive motor 15 and Connected to an external power supply, the support cylinder 14 provides the basis for the rotational connection of the fixed cylinder 2, the outer sleeve of the support cylinder 14 is provided with a ball bearing 16, the ball bearing inner ring 19 is fixedly connected to the support cylinder 14, and the support cylinder 14 is fixedly connected. The outer ball bearing ring 20 is fixedly connected with the fixing cylinder 2, the inner ball bearing ring 19 and the supporting cylinder 14, the outer ball bearing ring 20 and the fixing cylinder 2 are all fixedly connected by bolts;

The outer side wall of the outer ball bearing ring 20 is evenly and fixedly connected with a number of teeth, and the output shaft of the driving motor 15 is coaxially and fixedly connected with a driving gear 21. The driving gear 21 and the teeth of the outer ball bearing ring 20 Meshing, in the specific use of this embodiment, the drive motor 15 drives the ball bearing outer ring 20 to rotate through the drive gear 21, thereby driving the fixed cylinder 2 to rotate, and then drives the scraper 3 to rotate and cut around the cartilage head of the femoral head.

Embodiment 5, on the basis of Embodiment 1, the lower end of the fixing cylinder 2 is fixedly connected with two oppositely arranged scrapers 3, and the cartilage head at the lower end of the femoral head is placed between the two scrapers 3, and the scrapers 3 3 can be made of elastic metal material, this setting can make the two scrapers 3 close to the cartilage head, which is convenient for better cutting, and the scraper 3 can be a 18-10 stainless steel thin blade;

At the same time, when the soft scraper tells the rotation to cut the femoral head, if it encounters a large protrusion of the femoral head, it will easily break the blade or cause damage to the femoral head. Therefore, a better structure is provided below to avoid When this happens, specifically, the lower end of the fixing cylinder 2 is slidably connected with two lower scraper seats 27 arranged opposite to each other, and the scraper 3 is fixedly connected to the two lower scraper seats 27 respectively. 2. The upper end is slidably connected with two oppositely arranged scraper upper seats 28, and two scraper upper seats 28 are respectively slidably connected with two said scrapers 3, two said scraper upper seats 28 and two said scraper lower seats 27 Both are connected to the fixed cylinder 2 through a spring, and the scraper upper seat 28 and the scraper lower seat 27 can move synchronously and are connected to the fixed cylinder 2 through the spring. Specifically, referring to FIG. 4, this setting can make the scraper 3 always close to the femoral head, which is convenient for the scraper 3 to cut. , the back of the scraper 3 is fixedly connected with an L-shaped plate 22 with an opening facing the direction of the blade, this setting can make the scraper 3 in the cutting process, the cut tissue debris can enter the L-shaped plate along the inertia of the cutting direction 22 forms a semi-open through groove, and through the action of the L-shaped plate 22 and the negative pressure area formed by the fan 26 under the annular through hole 17, the cut tissue debris directly passes through the annular through hole along the L-shaped plate 22. The hole 17 falls on the tray 18, the back of the scraper 3 is provided with a wheel frame 23 extending along the direction of the blade, the wheel frame 23 is rotatably connected with a guide wheel 24, and the lower edge of the guide wheel 24 is higher than Blade, the setting of the guide wheel 24 cooperates with the scraper upper seat 28, the scraper lower seat 27 and the spring, so that the blade of the scraper 3 changes along the surface of the femoral head, and the blade of the scraper 3 always cuts between the blade and the lower edge of the guide wheel 24. Therefore, the scraper 3 and the femoral head are effectively protected. In this embodiment, the femoral head is put into the fixed cylinder 2, and under the action of the spring, the scraper upper seat 28 and the scraper lower seat 27, the scraper 3 is closely attached The surface of the femoral head, and then the rotation of the fixed cylinder 2 drives the two scrapers 3 to rotate. Under the action of the guide wheel 24, the upper seat 28 of the scraper, the lower seat 27 of the scraper and the spring can make the blade of the scraper 3 follow the change of the surface of the femoral head. However, the blade of the scraper 3 always cuts the tissue between the blade and the lower edge of the guide wheel 24, and the cut tissue debris can enter the L-shaped plate 22 along the inertia of the cutting direction to form a semi-open through groove, through the L-shaped The action of the plate 22 cooperates with the negative pressure area formed by the fan 26 under the annular through hole 17 , and the tissue debris falls on the tray 18 .

In the specific use of the present invention, the user first unscrews the lower nut 10, takes out the outer adjustment sleeve 4, and puts the femoral head into the inner compression sleeve 5 from below the outer adjustment sleeve 4. At this time, one end of the femoral head cartilage head is downward, and then rotate the inner compression sleeve 5. When the user rotates the inner compression sleeve 5 to make it move downward, the inner wall side of the clamping wedge ring 12 will press the clamping opening 6 to tighten inward, so that the femoral head clamping;

After that, place the outer adjusting sleeve 4 in the arc-shaped slide rail 8, at this time the upper nut 9 is clamped on the two arc-shaped plates, and then screw the lower nut 10 outside the outer adjusting sleeve 4, and adjust the lower nut 10 and The position of the upper nut 9, thereby adjusting the placement height of the cartilage head at the lower end of the femoral head, the femoral head is placed in the fixed cylinder 2, under the action of the spring and the upper seat 28 of the scraper and the lower seat 27 of the scraper, the scraper 3 is close to the surface of the femoral head, and then , swing the outer adjustment sleeve 4 to adjust the angle of the femoral head cutting, after confirming, screw down the lower nut 10, and cooperate with the upper nut 9 to fix the outer adjustment sleeve 4 in the arc-shaped slide rail 8,

After that, it is only necessary to start the driving motor 15. The driving motor 15 drives the outer ring 20 of the ball bearing to rotate through the driving gear 21, thereby driving the fixed cylinder 2 to rotate, and then drives the scraper 3 to rotate and cut around the cartilage head of the femoral head. The rotation of the fixed cylinder 2 drives two The scraper 3 rotates, under the action of the guide wheel 24, the upper seat 28 of the scraper, the lower seat 27 of the scraper and the spring can make the blade of the scraper 3 change along the surface of the femoral head, and the blade of the scraper 3 always cuts the blade and guides In the tissue between the lower edges of the wheel 24, the cut tissue debris can enter the L-shaped plate 22 to form a semi-open through groove along the inertia of the cutting direction. In the negative pressure area formed below 17 , the tissue debris falls on the tray 18 .

The present invention makes improvements to the problems of low efficiency of artificial sampling of femoral head cartilage and low sample quality. The inner and outer sleeves are used to cooperate with the clamping wedge ring and the clamping port, so that the femoral head specimen can be clamped; The adjustment of the specimen position can not only adjust the cutting depth to avoid the contamination of the subchondral bone, but also adjust the angle of the swinging femoral head specimen, change the cutting position, and complete the sampling requirements at different positions; the scraper is set to a flexible metal material, which can make the scraper tightly It fits the surface of the specimen and cuts better; the present invention can electrically complete the acquisition of cartilage tissue for experiments. Compared with the traditional sampling process, the present invention can shorten the sampling time, improve the quality of cartilage, increase the success rate of subsequent experiments, and has strong practicability.

Claims (7)

1. The femoral head cartilage sampler for the electric experiment is characterized by comprising a main body shell (1), wherein a fixing cylinder (2) which is through up and down is rotatably connected in the main body shell (1), and a scraper (3) is fixedly connected in the fixing cylinder (2);

the upper end of the main body shell (1) is connected with an outer adjusting sleeve (4) in a left-right sliding mode, the outer adjusting sleeve (4) can be adjusted in position and fixed through a combined nut meshed with external threads of the outer adjusting sleeve, an inner pressing sleeve (5) is meshed with internal threads of the outer adjusting sleeve (4), and the lower end of the inner pressing sleeve (5) is coaxially and integrally connected with a flexible clamping port (6);

the bottom surface of the fixed cylinder (2) is provided with an annular through hole (17) surrounding the scraper (3);

a support cylinder (14) is fixedly connected to the bottom surface inside the main body shell (1), a vent hole (25) is formed below the support cylinder (14), and a fan (26) fixedly connected into the main body shell (1) is arranged beside the vent hole (25);

a lofting opening (7) is formed in the upper end of the main body shell (1), an arc-shaped sliding rail (8) fixedly connected with the main body shell (1) is arranged above the lofting opening (7), and the arc-shaped sliding rail (8) is connected with the outer adjusting sleeve (4) in a sliding manner;

the combined nut comprises a lower nut (10) detachably sleeved at the lower end of the outer adjusting sleeve (4) and an upper nut (9) sleeved outside the outer adjusting sleeve (4) in a threaded manner, and the upper nut (9) is positioned above the lower nut (10);

the arc-shaped sliding rail (8) is formed by two arc-shaped plates fixedly connected to two sides of the lofting opening (7), and the outer adjusting sleeve (4) is arranged between the two arc-shaped plates; the upper nut (9) is arranged above the arc-shaped plate, and the lower nut (10) is arranged below the arc-shaped plate.

2. The femoral head cartilage sampler for the electric experiment as claimed in claim 1, wherein a gasket (11) sleeved outside the outer adjusting sleeve (4) is arranged below the upper nut (9) and above the lower nut (10).

3. The femoral head cartilage sampler for the electric experiment as claimed in claim 1, wherein the lower end of the outer adjusting sleeve (4) is coaxially and integrally connected with a clamping wedge-shaped ring (12), the inner wall of the clamping wedge-shaped ring (12) is an inclined surface, and the inner diameter of the upper end surface of the clamping wedge-shaped ring (12) is larger than that of the lower end surface;

the outer side wall of the clamping opening (6) is an inclined surface and can be attached to the inner wall of the clamping wedge-shaped ring (12);

the side wall of the clamping opening (6) is provided with a movable through groove (13).

4. The femoral head cartilage sampler for the electric experiment as claimed in claim 1, wherein the fixed cylinder (2) is rotatably connected in the supporting cylinder (14), and the fixed cylinder (2) is connected with a driving motor (15) fixedly connected in the main body shell (1).

5. The femoral head cartilage sampler for the electric experiment as claimed in claim 4, wherein the support cylinder (14) is sleeved with a ball bearing (16), the ball bearing inner ring (19) is fixedly connected with the support cylinder (14), and the ball bearing outer ring (20) is fixedly connected with the fixed cylinder (2);

the ball bearing outer ring (20) outer wall is evenly fixedly connected with a plurality of teeth, the output shaft of the driving motor (15) is coaxially and fixedly connected with a driving gear (21), and the driving gear (21) is meshed with the teeth of the ball bearing outer ring (20).

6. The femoral head cartilage sampler for the electric experiment as claimed in claim 1, wherein the lower end of the fixed cylinder (2) is slidably connected with two opposite scraper lower seats (27), the two scraper lower seats (27) are respectively and fixedly connected with the scrapers (3), the upper end of the fixed cylinder (2) is slidably connected with two opposite scraper upper seats (28), and the two scrapers (3) are respectively and slidably connected in the two scraper upper seats (28);

the scraper (3) is characterized in that an L-shaped plate (22) with an opening facing the direction of the blade point is fixedly connected to the blade back of the scraper (3), a wheel carrier (23) is arranged on the blade back of the scraper (3) in an extending manner along the direction of the blade point, a guide wheel (24) is rotatably connected to the wheel carrier (23), and the lower edge of the guide wheel (24) is higher than the blade point;

the two scraper upper seats (28) and the two scraper lower seats (27) are connected with the fixed cylinder (2) through springs.

7. The femoral head cartilage sampler for the electric experiment as claimed in claim 1, wherein the lower end of the supporting cylinder (14) is provided with a tray (18) which is slidably connected in the main body shell (1).

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