Bone biopsy needle convenient for accurate positioning

Abstract

The invention belongs to the technical field of medical instruments, and particularly relates to a bone biopsy needle convenient for accurate positioning, which comprises a needle body, and a thread is arranged at the lower end of the needle body; the device further comprises a guide frame, a pressing rod piece, a coil spring barrel and a puncture control piece, the guide frame comprises an upper limiting plate, a lower limiting plate and a connecting piece connected between the upper limiting plate and the lower limiting plate, and at least two guide rods are arranged between the upper limiting plate and the lower limiting plate; a pressing rod piece, a spring coiling barrel and the needle body are sequentially arranged on the guide frame from top to bottom, a spring is connected between the pressing rod piece and the guide frame, and the spring can be used for enabling the pressing rod piece to have a downward pressing trend. The puncture needle has the advantages that compared with the prior art, puncture operation is facilitated, the needle inserting depth and direction can be accurately controlled during puncture operation, and the accuracy of an operation is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of medical instruments, and in particular relates to a bone biopsy needle which is convenient for accurate positioning. Background Art

[0002] Bone biopsy needles are used to sample bone or bone-like tissue lesions and are the main method for obtaining bone lesion biopsy tissue at home and abroad. During the puncture process, the depth and angle of the bone biopsy needle are mainly determined by the doctor's experience and feel. During the puncture process, the puncture force is usually dispersed into two dimensions of downward pressure and rotational torque. Therefore, when performing bone biopsy puncture, especially for harder bone tissue (such as the skull), it is easy to have deviations in the grasp of the puncture direction, and the puncture depth is also difficult to accurately grasp.

[0003] In order to overcome the above technical problems, the Chinese invention patent with application publication number CN116269531A discloses "A Manually Assisted Bone Biopsy Needle". This manually assisted bone biopsy needle includes an outer sleeve assembly and a manual assist assembly. The outer sleeve assembly includes an outer sleeve and an outer sleeve handle. One end of the outer sleeve is fixedly connected to a through hole opened on the outer sleeve handle, and the part of one end of the outer sleeve located in the outer sleeve handle is processed and formed into a triangular prism-shaped sleeve; the manual assist assembly includes a spiral twisted rod, a movable handle, a fixed handle and a triangular prism plug; one end of the spiral twisted rod is fixedly connected to the fixed handle, and the other end of the fixed handle is fixedly connected to the triangular prism plug, which is a triangular prism-shaped rod, and the triangular prism plug is inserted and connected to the inside of the triangular prism-shaped sleeve; the middle part of the spiral twisted rod is rotatably connected to the movable handle, the middle part of the movable handle is opened and the end is fixedly connected to a circular metal plate, and a connecting hole with the same cross-sectional shape as the spiral twisted rod is opened on the circular metal plate. When using the above-mentioned bone biopsy needle, the operator needs to manually apply pressure and rotation forces at the same time. When applying pressure and torque at the same time, it is still difficult for the operator to grasp the puncture direction, especially for harder bone tissue (such as the skull), which is easy to deviate. It is equivalent to using a screwdriver to "tighten the screw". Many people tend to twist it off-center, which can easily cause medical accidents. It can be seen that the bone biopsy needle in the prior art has technical problems that are not conducive to accurate puncture positioning. Summary of the invention

[0004] The object of the present invention is to provide a bone biopsy needle that is easy to accurately position, so as to solve the technical problem in the prior art that bone biopsy needle insertion is not conducive to accurate puncture positioning.

[0005] In order to achieve the above object, the present invention provides the following technical solutions: A bone biopsy needle for facilitating precise positioning, comprising: A needle body, wherein the lower end of the needle body is provided with a thread; It also includes a guide frame, a pressure rod, a coil spring tube and a puncture control member, wherein the guide frame includes an upper limit plate, a lower limit plate and a connecting member connected between the upper limit plate and the lower limit plate, and at least two guide rods are provided between the upper limit plate and the lower limit plate; The guide frame is provided with a pressure rod, a coil spring tube and the needle body in order from top to bottom, and a spring is connected between the pressure rod and the guide frame, and the spring can be used to make the pressure rod have a downward pressing tendency; The coil spring barrel is arranged between the upper limit plate and the lower limit plate, and the coil spring barrel comprises a barrel member, a coil spring and a drive shaft, the drive shaft is rotatably connected to the barrel member, the upper and lower ends of the drive shaft are exposed outside the barrel member, and the coil spring is connected between the barrel member and the drive shaft to store force for the drive shaft; The coil spring barrel is arranged between the upper limit plate and the lower limit plate so as to be able to move downward, and the guide rod is used to guide the downward movement of the coil spring barrel; The pressure rod comprises a rod body and a pressure head, the pressure head is rotatably connected to the lower end of the rod body, the pressure head and the upper end of the driving shaft are detachably connected to each other, a first latch hole is provided on the pressure head, and a second latch hole is provided on the guide frame, and the first latch hole and the second latch hole can be aligned; A pin is inserted into the second pin hole, and the pin can be inserted into the first pin hole aligned with the second pin hole; The lower end of the driving shaft and the upper end of the needle body are detachably connected in transmission; The lower limit plate is provided with a passage hole, and the passage hole is used for the lower end of the needle body to pass downward; The puncture control member is used to release the puncture pressing force.

[0006] When using the bone biopsy needle of the present invention for puncture, the operator (doctor) holds the guide frame and presses the lower limit plate against the puncture position. Then, the latch is pulled out of the second latch hole; and the latch releases the limit work of the pressure head in the two dimensions of up and down and rotation; then, under the action of the spring, the pressure head presses the drive shaft downward; the coil spring tube moves downward, and the pressure is transmitted to the needle body synchronously; during the downward movement of the coil spring tube, under the action of the coil spring, the drive shaft rotates, and the drive shaft drives the needle body to rotate synchronously. In the above process, the needle body is synchronously subjected to pressure and rotation driving force, and then the puncture work is performed. The puncture control member is conducive to timely release of the pressure on the needle body, and to a certain extent, it is conducive to controlling the puncture depth and avoiding the problem of excessive puncture. When using the present invention for puncture, the operator (doctor) only needs to hold the present invention in place. Since the pressure of the spring is related to its elastic deformation, it is conducive to accurately grasping the upper limit range of pressure during the puncture process. In this puncture process, the rotational force is released by the coil spring, and the operator does not actually need to rotate his arm. Therefore, compared with the prior art, the present invention is conducive to maintaining the puncture position and puncture direction; it is conducive to reducing the difficulty of puncture and improving the accuracy of puncture.

[0007] Furthermore, the guide frame is slidably connected to a carrier frame, the carrier frame is connected to a sliding sleeve, the sliding sleeve is slidably connected to the guide rod, the carrier frame is provided with a pit, the bottom of the pit is provided with a hole for passing the lower end of the drive shaft, the periphery of the pit is provided with a limiting groove, the bottom of the cylinder is provided with a limiting head for cooperating with the limiting groove, the limiting head cooperates with the limiting groove to prevent the cylinder from rotating on the carrier. The advantage is that it is convenient to replace the coil spring barrel in the present invention; after the coil spring barrel is removed from the carrier frame, it is convenient to tighten the coil spring by rotating the drive shaft to store force; the features of the pit, the limiting groove and the limiting head are not only conducive to the disassembly of the coil spring barrel, but also can ensure that the drive shaft can stably transmit torque when the coil spring barrel is installed in place.

[0008] Furthermore, the puncture control member is cylindrical, the lower end of the puncture control member can be detachably connected to the lower limit plate, the needle body is sleeved through the puncture control member, the upper end of the puncture control member is located below the carrier, and the upper end of the puncture control member is used to limit the lowest position of the carrier. The advantage is that the principle of the puncture control member controlling the puncture depth of the needle body is that after the bottom of the carrier and the upper end of the puncture control member are against each other, the top of the puncture control member forms a support for the carrier, thereby blocking the carrier from further moving downward. After the carrier cannot move downward, the drive shaft cannot press the needle body, thereby limiting the puncture depth and also facilitating puncture safety.

[0009] Furthermore, the puncture control member is formed by sequentially splicing at least two unit components, and two adjacent unit components are threadedly connected. The advantage is that the total length of the puncture control member can be adjusted by relatively rotating the threaded unit components, thereby facilitating the adjustment of the control amount of the puncture depth.

[0010] Furthermore, the guide frame is provided with a handle, which includes a first gripping portion, the first gripping portion is arranged opposite to the outer end of the latch, and the outer end of the latch is connected to a second gripping portion. The advantage is that when the operator (doctor) holds the present invention, one hand holds it in such a way that the base of the thumb is stuck on the first gripping portion, and one or more fingers other than the thumb form a "hooking and pulling" tendency on the second gripping portion. When the latch needs to be pulled out, the hand holds it with force, and then pulls the second gripping portion, and then pulls the latch out of the first latch hole, which facilitates the manual release of the latch's limit on the pressure head in the up and down and rotational dimensions.

[0011] Furthermore, the guide frame is provided with a handle, and the handle and the handle are distributed on the left and the right. The advantage is that during the puncture operation, it is convenient to operate the present invention with both hands, which is further conducive to the stability of the needle body orientation during the puncture process and the accuracy of the puncture direction.

[0012] Furthermore, the cylinder member includes a cylinder body and two cylinder covers, and the cylinder covers are detachably connected to the two ends of the cylinder body, and each cylinder cover is provided with a first bearing, and the first bearing is used to support the drive shaft. The advantages are that it is conducive to the smooth rotation of the drive shaft and reduces the friction loss during the transmission process; it is conducive to ensuring the conversion ratio of the elastic potential energy of the coil spring into the kinetic energy of the needle body rotation.

[0013] Furthermore, the upper limit plate is provided with a hole for inserting the rod body, the rod body passes through the upper limit plate, the spring is a compression spring, the spring is inserted on the rod body, the spring is located below the upper limit plate, and a stopper is provided on the rod body, the stopper is located below the spring and is used to limit the lower end of the spring. The advantage is that the structure of the present invention is compact and the spring is convenient to replace; thus, it is convenient to adjust the pressure when puncturing bones of different hardness.

[0014] Furthermore, a protective pad is provided at the bottom of the lower limit plate, which has the advantage that the protective pad is used to contact the skin at the puncture position, thereby improving the comfort during puncture.

[0015] Furthermore, a locking pin is provided on the cylinder member, and a locking hole is provided on the drive shaft. The locking pin can be inserted into the locking hole. After the locking pin is inserted into the drive shaft, it is used to lock the drive shaft. The advantage is that when the coil spring barrel is in a state of being detached from the present invention, after the coil spring in the coil spring barrel accumulates force, the drive shaft is locked by the locking pin, thereby preventing the drive shaft from rotating. After the coil spring barrel is installed in place in the present invention and the pressing head is limited in two dimensions, up and down, and in rotation, the locking pin can be pulled out. Multiple spare coil spring barrels can be configured, and different coil spring barrels have different force storage capabilities, that is, the elastic coefficients of the corresponding coil springs are different. During the actual puncture operation, it is beneficial to provide medical staff with a variety of options according to actual conditions.

[0016] The present invention has the following beneficial effects: according to the hardness of the bone to be punctured, the present invention controls the range of force applied to the puncture needle by selecting a spring with a suitable elastic coefficient, thereby facilitating accurate control of the depth and direction of needle insertion. In summary, compared with the prior art, the present invention facilitates the puncture operation, and during the puncture operation, the present invention can accurately control the depth and direction of needle insertion, thereby improving the accuracy of the operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a three-dimensional schematic diagram of the present invention; Figure 2 A three-dimensional schematic diagram of a guide frame; Figure 3 is a schematic diagram of the structure of the pressing member; Figure 4 It is a three-dimensional schematic diagram of a spring coil; Figure 5 This is a schematic diagram of the spring coil after the coil body is removed; Figure 6 is a three-dimensional schematic diagram of the mounting frame; Figure 7 is a three-dimensional schematic diagram of a puncture control member; Figure 8 is a three-dimensional schematic diagram of a needle body; In the figure: 1 needle body, 11 thread, 2 upper limit plate, 21 lower limit plate, 211 channel hole, 22 connecting piece, 221 guide rod, 23 hook stopper, 24 outer end support part, 25 disassembly part, 26 second latch hole, 27 protective pad, 3 rod body, 31 pressure head, 32 first latch hole, 33 spring, 34 stopper, 35 connecting part, 4 cylinder body, 41 cylinder cover, 42 first bearing, 43 coil spring, 44 driving shaft, 45 locking pin, 46 limit head, 5 puncture control part, 51 stopper bar, 6 handle part, 61 first grip part, 7 latch, 71 second grip part, 8 mounting frame, 81 sliding sleeve, 82 pit, 83 limit groove, 9 handle part. DETAILED DESCRIPTION

[0018] like Figures 1 to 8As shown, during puncture, the operator holds the guide frame and places the lower limit plate 21 against the puncture position. Then the latch 7 is pulled out from the second latch hole 26; and then the latch releases the limit work of the pressure head 31 in the up and down and rotational dimensions; then, under the action of the spring 33, the pressure head presses the drive shaft 44 downward; the coil spring tube moves downward, and the pressure is transmitted to the needle body 1 synchronously; during the downward movement of the coil spring tube, under the action of the coil spring 43, the drive shaft 44 rotates, and the drive shaft 44 synchronously drives the needle body 1 to rotate. In the above process, the needle body 1 is simultaneously subjected to pressure and rotation driving force, and then the puncture work is performed. The puncture control member 5 is conducive to timely release of the pressure on the needle body, and to a certain extent, it is conducive to controlling the puncture depth and avoiding the problem of excessive puncture. When using the present invention for puncture, the user only needs to put the present invention in place. Since the pressure of the spring is related to its elastic deformation, the upper limit range of the pressure during the puncture process can be accurately grasped after selecting the spring with the corresponding elastic coefficient according to the hardness of the bone to be punctured. During the puncture process, the rotational force is released by the coil spring, and the operator does not actually need to rotate his arm. Therefore, compared with the prior art, the present invention is conducive to maintaining the puncture position and puncture direction, reducing the difficulty of puncture and improving the accuracy of puncture.

[0019] like Figure 1 As shown, a bone biopsy needle for accurate positioning includes a needle body 1, a guide frame, a pressure rod, a coil spring tube and a puncture control member 5. The guide frame is provided with a pressure rod, a coil spring tube and a needle body 1 from top to bottom, and a spring 33 is connected between the pressure rod and the guide frame, and the spring 33 can be used to make the pressure rod have a downward pressing tendency.

[0020] like Figure 1 and Figure 8 As shown, a thread 11 is provided at the lower end of the needle body 1 .

[0021] like Figure 1 and Figure 2 As shown, the guide frame includes an upper limit plate 2, a lower limit plate 21, and a connecting member 22 connected between the upper limit plate 2 and the lower limit plate 21. Three rod-shaped connecting members 22 are arranged between the upper limit plate 2 and the lower limit plate 21, and a section of the connecting member 22 is used as a guide rod 221. A protective pad 27 is arranged at the bottom of the lower limit plate 21. The protective pad 27 is made of skin-friendly material, and is used to improve the comfort of use.

[0022] like Figure 1 , Figure 4 and Figure 5As shown, the coil spring barrel is arranged between the upper limit plate 2 and the lower limit plate 21. The coil spring barrel includes a barrel member, a coil spring 43 and a drive shaft 44; the barrel member includes a barrel body 4 and two barrel covers 41. The barrel body 4 is detachably connected with a barrel cover 41 at both ends, and three first ear plates are evenly arranged on the barrel cover 41 along the circumferential direction, and each ear plate is provided with a hole for inserting a bolt; three second ear plates are respectively arranged at the upper end and the lower end of the barrel body; threaded holes for connecting with bolts are arranged on the second ear plates, and then the barrel cover and the barrel body are detachably connected by bolts, so as to facilitate the disassembly and maintenance of the coil spring barrel.

[0023] like Figure 1 , Figure 4 and Figure 5 As shown, the drive shaft 44 is rotatably connected to the cylinder, the upper and lower ends of the drive shaft 44 are exposed outside the cylinder, and the coil spring 43 is connected between the cylinder and the drive shaft 44 to store force for the drive shaft 44. Each cylinder cover 41 is provided with a first bearing 42, and the first bearing 42 is used to support the drive shaft 44.

[0024] like Figure 1 , Figure 4 and Figure 6 As shown, the coil spring barrel can be arranged between the upper limit plate 2 and the lower limit plate 21 so as to move downward, and the guide rod 221 is used to guide the downward movement of the coil spring barrel. The guide frame is slidably connected to the carrier frame 8, and the carrier frame 8 is connected to a sliding sleeve 81, and the sliding sleeve 81 is slidably connected to the guide rod 221. The carrier frame 8 is provided with a pit 82, and the bottom of the pit 82 is provided with a hole for passing the lower end of the drive shaft 44. The periphery of the pit 82 is provided with a limiting groove 83, and the bottom of the cylinder is provided with a limiting head 46 for cooperating with the limiting groove 83, and the limiting head 46 cooperates with the limiting groove 83 to prevent the cylinder from rotating on the carrier. The limiting head is formed by a first ear plate and a second ear plate that are matched with each other at the bottom of the cylinder. A locking pin 45 is provided on the cylinder, and a locking hole is provided on the drive shaft 44. The locking pin 45 can be inserted into the locking hole. After the locking pin 45 is inserted into the drive shaft 44, it is used to lock the drive shaft 44. The spring barrel can be removed from the mounting frame. First, it is convenient to store force on the spring of the spring barrel (the spring can be stored force by rotating the drive shaft 44). After the spring is stored force, the drive shaft is locked by the locking pin 45. The spring barrel after storing force is ready for use. Multiple types of spring barrels can be configured. The difference between different types of spring barrels lies in the different elastic coefficients of the springs. Second, it is convenient to replace different types of spring barrels.

[0025] like Figure 1 , Figure 3 and Figure 4As shown, the pressure rod member includes a rod body 3 and a pressure head 31. The pressure head 31 is rotatably connected to the lower end of the rod body 3. The pressure head 31 and the upper end of the drive shaft 44 are detachably connected in transmission. The upper end of the drive shaft 44 is processed into a regular hexagon. A connecting portion 35 is provided at the bottom of the pressure head 31. The connecting portion 35 is provided for plugging in a hole position at the upper end of the drive shaft 44, and the hole position is a regular hexagon. A first latch hole 32 is provided on the pressure head 31, and a second latch hole 26 is provided on the guide frame. The first latch hole 32 and the second latch hole 26 can be aligned. A latch 7 is inserted in the second latch hole 26, and the latch 7 can be inserted into the first latch hole 32 aligned with the second latch hole 26. When the pressure head 31 is limited by the latch and the transmission connection between the drive shaft and the pressure head is in place, the locking pin can be removed.

[0026] like Figures 1 to 3 As shown, the upper limit plate 2 is provided with a hole for inserting the rod body 3, and the rod body 3 passes through the upper limit plate 2. The spring 33 is a compression spring, and the spring 33 is inserted on the rod body 3. The spring 33 is located below the upper limit plate 2. A stopper 34 is provided on the rod body 3, and the stopper 34 is located below the spring 33 to limit the lower end of the spring 33.

[0027] like Figure 1 and Figure 8 As shown, the lower end of the driving shaft 44 and the upper end of the needle body 1 are detachably connected in transmission; the upper end of the needle body 1 is arranged to be a regular hexagon, and a hole for plugging the upper end of the needle body 1 is provided at the lower end of the driving shaft 44, and the hole is a regular hexagon, which is used for detachable transmission connection.

[0028] like Figure 1 and Figure 2 As shown, a passage hole 211 is provided on the lower limit plate 21 , and the passage hole 211 is used for the lower end of the needle body 1 to pass downward.

[0029] like Figure 1 , Figure 2 and Figure 7 As shown, the puncture control member 5 is used to release the puncture pressing force. The puncture control member 5 is cylindrical, and is formed by splicing two unit components in sequence. The two adjacent unit components are threadedly connected, so as to facilitate the adjustment of the total length of the puncture control member 5. The lower end of the puncture control member 5 can be detachably connected to the lower limit plate 21. The bottom of the puncture control member is provided with three sections of baffles 51. The three sections of baffles 51 are evenly distributed along the circumferential direction, and a gap is provided between two adjacent baffles; the lower limit plate 21 is provided with a blocking hook 23, and the upper end of the blocking hook 23 can pass through the gap. The blocking hook 23 is used to hook the baffle 51, and then used to detachably connect the control member 5. The needle body 1 is sleeved with the puncture control member 5, and the upper end of the puncture control member 5 is located below the carrier 8. The upper end of the puncture control member 5 is used to limit the lowest position of the carrier 8.

[0030] like Figure 1 and Figure 2 As shown, the guide frame is provided with a handle member 6, and the handle member 6 includes a first gripping portion 61, and the first gripping portion 61 is arranged opposite to the outer end of the plug 7, and the outer end of the plug 7 is connected to the second gripping portion 71. The guide frame is provided with a handle member 9, and the handle member 9 and the handle member 6 are distributed on the left and the right. The guide frame is provided with an outer end support portion 24 and a disassembly portion 25. The outer end support portion 24 is provided with an end portion for plugging the plug 7 passing through the pressure head 31, so as to support the plug 7. The end of the handle member 9 is provided with an external thread, and the disassembly portion 25 is provided with an internal thread hole for matching with the external thread, so that the handle member can be detachably connected through the disassembly portion 25, so as to facilitate the storage of the handle member.

[0031] The detachable transmission connection involved in the present invention can also be achieved through the cooperation of a shaft key and a hole capable of inserting a shaft with a shaft key.

Claims

1. A bone biopsy needle that facilitates precise positioning, characterized in that: include: A needle body, wherein the lower end of the needle body is provided with a thread; It also includes a guide frame, a pressure rod, a coil spring tube and a puncture control member, wherein the guide frame includes an upper limit plate, a lower limit plate and a connecting member connected between the upper limit plate and the lower limit plate, and at least two guide rods are provided between the upper limit plate and the lower limit plate; The guide frame is provided with a pressure rod, a coil spring tube and the needle body in order from top to bottom, and a spring is connected between the pressure rod and the guide frame, and the spring can be used to make the pressure rod have a downward pressing tendency; The coil spring barrel is arranged between the upper limit plate and the lower limit plate, and the coil spring barrel comprises a barrel member, a coil spring and a drive shaft, the drive shaft is rotatably connected to the barrel member, the upper and lower ends of the drive shaft are exposed outside the barrel member, and the coil spring is connected between the barrel member and the drive shaft to store force for the drive shaft; The coil spring barrel is arranged between the upper limit plate and the lower limit plate so as to be able to move downward, and the guide rod is used to guide the downward movement of the coil spring barrel; The pressure rod comprises a rod body and a pressure head, the pressure head is rotatably connected to the lower end of the rod body, the pressure head and the upper end of the driving shaft are detachably connected to each other, a first latch hole is provided on the pressure head, and a second latch hole is provided on the guide frame, and the first latch hole and the second latch hole can be aligned; A pin is inserted into the second pin hole, and the pin can be inserted into the first pin hole aligned with the second pin hole; The lower end of the driving shaft and the upper end of the needle body are detachably connected in transmission; The lower limit plate is provided with a passage hole, and the passage hole is used for the lower end of the needle body to pass downward; The puncture control member is used to release the puncture pressing force.

2. The bone biopsy needle for easy precise positioning according to claim 1, characterized in that: The guide frame is slidably connected to a carrying frame, the carrying frame is connected to a sliding sleeve, the sliding sleeve is slidably connected to the guide rod, the carrying frame is provided with a pit, the bottom of the pit is provided with a hole for passing the lower end of the driving shaft, the periphery of the pit is provided with a limiting groove, the bottom of the cylinder is provided with a limiting head for cooperating with the limiting groove, the limiting head and the limiting groove cooperate to prevent the cylinder from rotating on the carrying member.

3. The bone biopsy needle for easy precise positioning according to claim 2, characterized in that: The puncture control member is cylindrical, the lower end of which is detachably connected to the lower limit plate, the needle body is sleeved through the puncture control member, the upper end of which is located below the carrier, and the upper end of which is used to limit the lowest position of the carrier.

4. The bone biopsy needle for easy precise positioning according to claim 3, characterized in that: The puncture control component is formed by sequentially splicing at least two unit components, and two adjacent unit components are threadedly connected.

5. The bone biopsy needle for easy precise positioning according to claim 1, characterized in that: The guide frame is provided with a handle, which includes a first gripping portion, the first gripping portion is arranged opposite to the outer end of the latch, and the outer end of the latch is connected to the second gripping portion.

6. The bone biopsy needle for easy precise positioning according to claim 5, characterized in that: The guide frame is provided with a handle piece, and the handle piece and the handle piece are distributed on the left and the right.

7. The bone biopsy needle for easy precise positioning according to claim 1, characterized in that: The cylinder member comprises a cylinder body and two cylinder covers. Both ends of the cylinder body are detachably connected with cylinder covers. Each cylinder cover is provided with a first bearing, and the first bearing is used to support the driving shaft.

8. The bone biopsy needle for easy precise positioning according to claim 1, characterized in that: The upper limit plate is provided with a hole for inserting the rod body, the rod body passes through the upper limit plate, the spring is a compression spring, the spring is inserted into the rod body, the spring is located below the upper limit plate, a stopper is provided on the rod body, and the stopper is located below the spring to limit the lower end of the spring.

9. The bone biopsy needle for easy precise positioning according to claim 1, characterized in that: A protective pad is provided at the bottom of the lower limit plate.

10. The bone biopsy needle for easy precise positioning according to claim 1, characterized in that: The cylinder is provided with a locking pin, and the drive shaft is provided with a locking hole, into which the locking pin can be inserted. After the locking pin is inserted into the drive shaft, the locking pin is used to lock the drive shaft.

Images