Needle biopsy equipment for liver department

Abstract

The invention provides needle biopsy equipment for the liver department, and belongs to the field of inspection equipment. Comprising a mounting plate and a master control module. The mounting plate is arranged in a [shape, a main control module is mounted on the outer side wall of the mounting plate, a fixing and locking assembly is arranged in the mounting plate, a connecting plate is arranged on the upper side of the mounting plate, the connecting plate is arranged in an L shape and movably connected with two mounting shells, displacement adjusting assemblies are arranged on the mounting shells, and the displacement adjusting assemblies are movably connected with the mounting shells. And one side of the mounting shell on the upper side is fixedly connected with a fixing ring, and a spherical shell is assembled in the fixing ring. By arranging the displacement adjusting assembly and the angle driving assembly, through driving of a first motor and a second motor, a puncture needle can be rapidly adjusted to the designated position of the body of a patient, and by controlling third motors at different positions, the rotating position of a spherical shell can be adjusted by a driving wheel; therefore, the puncture needle can be accurately adjusted to a specified angle, and the puncture precision is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of inspection equipment, and particularly relates to a puncture biopsy device for hepatology. Background Art

[0002] In the field of diagnosis and treatment of liver diseases, puncture biopsy is a key technology. Through this technology, doctors can obtain liver tissue samples, providing extremely accurate basis for subsequent pathological diagnosis, which plays a decisive role in accurately judging the type and severity of liver diseases and formulating treatment plans.

[0003] In recent years, with the rapid progress of medical technology, the clinical performance requirements for liver puncture biopsy equipment have become increasingly stringent. Precision and stability have become important indicators for measuring the quality of equipment, directly related to the accuracy of diagnostic results and the treatment effects of patients. However, many traditional puncture biopsy operations still rely on manual puncture operations, with insufficient stability control. This leads to great uncertainty in the control of puncture precision during the puncture operation, which may cause deviations in the puncture position, thereby affecting the accuracy of sample collection and interfering with doctors' diagnostic judgments. Secondly, during traditional puncture biopsy operations, the operation process is cumbersome and complex, not only consuming a large amount of time and energy of doctors, but also doctors often need to repeatedly adjust based on experience, which undoubtedly increases the operation difficulty and uncertainty, and also brings additional pain and risks to patients.

[0004] For the above reasons, the present invention proposes a puncture biopsy device for hepatology to solve the deficiencies of existing technologies in puncture biopsy operations. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a puncture biopsy device for hepatology, which has the advantages of high puncture precision, automated operation, and reduced labor intensity.

[0006] To solve the above technical problems, the present invention provides the following technical solutions:

[0007] A puncture biopsy device for hepatology, including a mounting plate. The mounting plate is arranged in a "C" shape, and a main control module is installed on the outer side wall. A fixed locking component is arranged inside the mounting plate. A connecting plate is arranged on the upper side of the mounting plate. The connecting plate is arranged in an L shape and is movably connected with two mounting shells. A displacement adjusting component is arranged on the mounting shell. A fixing ring is fixedly connected to one side of the upper mounting shell. A spherical shell is assembled inside the fixing ring. An angle driving component is arranged on the side wall of the fixing ring. A movable ring is arranged on the upper side of the spherical shell. A puncture needle clamping component is arranged inside the movable ring. An injection component is arranged on the movable ring.

[0008] Preferably, the fixing and locking assembly includes a first threaded rod, and a plurality of first threaded rods are connected to the distributed threads on the bottom surface of the mounting plate. The top end of the first threaded rod extends into the mounting plate and is movably connected to a clamping plate, and a rotating wheel is fixedly installed on the bottom end of the first threaded rod.

[0009] Preferably, the displacement adjustment assembly includes a second threaded rod, a second threaded rod is threadedly connected to the mounting shell on the lower side, both ends of the second threaded rod are movably connected to side plates, the side plates are fixedly connected to the mounting plate, one end of the second threaded rod passes through the side plate and is fixedly connected to the first motor, the first motor is fixedly connected to the side plate, threaded holes are provided on the side walls at both ends of the connecting plate, third threaded rods are threadedly connected in the threaded holes, one end of the third threaded rod extends to the threaded hole and is fixedly connected to the second motor, and the two second motors are fixedly connected to the mounting shell.

[0010] Preferably, the angle driving assembly includes a through groove, four through grooves are distributed on the side wall of the fixed ring, a movable shell is movably connected in each of the through grooves, a rotating shaft is movably connected to the inner cavity of the movable shell, a driving wheel and a turbine are fixedly connected to the side wall of the rotating shaft, the side wall of the driving wheel extends out of the movable shell and is tightly arranged with the spherical shell, the rotation direction of adjacent driving wheels is vertically arranged, a worm is meshed on the turbine, one end of the worm is movably connected to the inner wall of the movable shell, the other end of the worm is fixedly connected to a third motor, the third motor is fixedly connected to the inner wall of the movable shell, a first electric push rod is fixedly connected to the side wall of the movable shell away from the driving wheel, the other end of the first electric push rod is fixedly connected to a fixing frame, and the fixing frame is fixedly connected to the outer wall of the fixed ring.

[0011] Preferably, the puncture needle clamping assembly includes a transverse plate, and two transverse plates are symmetrically and movably connected to the movable ring. The transverse plate is located inside the movable ring and is fixedly connected to an arc plate on one side. The other sides of the two transverse plates are movably connected to the same movable plate. The movable plate is concave and the two side walls are inclined. A second electric push rod is fixedly connected to the center of the side wall of the movable plate, and the other end of the second electric push rod is fixedly connected to the movable ring.

[0012] Preferably, the injection assembly includes a fourth motor, which is fixedly connected to the movable ring. A fourth threaded rod is fixedly connected to the rotor of the fourth motor. The bottom end of the fourth threaded rod is inserted into the spherical shell and threadedly connected to the spherical shell. A plurality of vertical rods are fixedly connected to the bottom surface of the movable ring. The vertical rods are inserted into the spherical shell and movably connected to the spherical shell.

[0013] Preferably, a slide rail is fixedly connected to the top surface of the mounting plate, and a slide groove is provided on the bottom surface of the mounting shell at the lower side, and the slide rail is movably connected to the slide groove.

[0014] Preferably, inclined grooves are provided on both sides of the movable plate, and a sliding block is fixedly connected to the transverse plate, and the sliding block is inserted into the inclined groove and movably connected to the inclined groove.

[0015] Compared with the prior art, the present invention has at least the following beneficial effects:

[0016] The present invention is provided with a displacement adjustment component and an angle driving component. Through the drive of the first motor and the second motor, the puncture needle can be quickly adjusted to a specified position of the patient's body, and by controlling the third motor at different positions, the driving wheel can adjust the rotation position of the ball shell, so that the puncture needle can be accurately adjusted to a specified angle, which can effectively improve the puncture accuracy.

[0017] The present invention is provided with a puncture needle clamping assembly and an injection assembly. By using the first electric drive, the two arc-shaped plates can accurately and stably clamp the puncture needle, effectively improving the stability of the puncture needle during the puncture process. In addition, by using the drive of the fourth motor, the puncture depth of the puncture needle can be accurately controlled, which not only facilitates the puncture operation but also improves the puncture accuracy, thereby effectively improving the accuracy of the puncture biopsy sample.

[0018] The present invention connects the main control module with an external CT or B-ultrasound device, uses the main control module to process data collected by the CT or B-ultrasound device, and inputs the processed information into the device, thereby realizing automated and accurate puncture biopsy operation of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings, which are incorporated herein and constitute a part of the specification, illustrate embodiments of the present disclosure and, together with the description, further serve to explain the principles of the present disclosure and to enable those skilled in the relevant art to make and use the present disclosure.

[0020] Figure 1 It is a schematic diagram of the front three-dimensional structure of the present invention;

[0021] Figure 2 It is a side perspective structural schematic diagram of the present invention;

[0022] Figure 3 It is a schematic diagram of the overall cross-sectional three-dimensional structure of the present invention;

[0023] Figure 4 It is a schematic diagram of the three-dimensional structure on the spherical shell of the present invention;

[0024] Figure 5 It is a schematic diagram of the cross-sectional three-dimensional structure of the spherical shell of the present invention;

[0025] Figure 6 It is a schematic diagram of the transverse cross-sectional three-dimensional structure of the fixing ring of the present invention;

[0026] Figure 7 It is a schematic diagram of the three-dimensional structure of the displacement adjustment component of the present invention;

[0027] Figure 8 It is a three-dimensional structural schematic diagram of the fixing and locking assembly of the present invention.

[0028] [reference numerals]

[0029] 1. Mounting plate; 2. Main control module; 3. Fixed locking assembly; 4. Connecting plate; 5. Mounting shell; 6. Displacement adjustment assembly; 7. Fixed ring; 8. Ball shell; 9. Angle drive assembly; 10. Movable ring; 11. Puncture needle clamping assembly; 12. Injection assembly; 13. First threaded rod; 14. Clamping plate; 15. Rotating wheel; 16. Second threaded rod; 17. Side plate; 18. First motor; 19. Third threaded rod; 20. Second motor; 21. Through groove; 22. Movable shell; 23. Rotating shaft; 24. Driving wheel; 25. Turbine; 26. Worm; 27. Third motor; 28. First electric push rod; 29. ​​Fixed frame; 30. Horizontal plate; 31. Arc plate; 32. Movable plate; 33. Second electric push rod; 34. Fourth motor; 35. Fourth threaded rod; 36. Vertical rod; 37. Slide rail; 38. Bevel groove; 39. Slider.

[0030] As shown in the figure, in order to clearly implement the structure of the embodiment of the present invention, specific structures and devices are marked in the figure, but this is only for illustrative purposes and is not intended to limit the present invention to the specific structure, device and environment. According to specific needs, ordinary technicians in this field can adjust or modify these devices and environments, and the adjustments or modifications made are still included in the scope of the attached claims. DETAILED DESCRIPTION

[0031] The following is a detailed description of a liver puncture biopsy device provided by the present invention in conjunction with the accompanying drawings and specific embodiments. At the same time, it is explained here that in order to make the embodiments more detailed, the following embodiments are the best and preferred embodiments, and those skilled in the art may also adopt other alternative methods to implement some known technologies; and the accompanying drawings are only for a more specific description of the embodiments, and are not intended to specifically limit the present invention.

[0032] It should be noted that the references to "one embodiment", "an embodiment", "an exemplary embodiment", "some embodiments" and the like in the specification indicate that the embodiments described may include specific features, structures or characteristics, but not every embodiment may include the specific features, structures or characteristics. In addition, when a specific feature, structure or characteristic is described in conjunction with an embodiment, it should be within the knowledge of a person skilled in the art to implement such feature, structure or characteristic in conjunction with other embodiments (whether or not explicitly described).

[0033] Generally, terms can be understood at least in part from their use in context. For example, depending at least in part on the context, the term "one or more" as used herein can be used to describe any feature, structure, or characteristic in a singular sense, or can be used to describe a combination of features, structures, or characteristics in a plural sense. Additionally, the term "based on" can be understood to not necessarily be intended to convey a set of exclusive factors, but rather, alternatively, depending at least in part on the context, to allow for the existence of other factors that may not be explicitly described.

[0034] It can be understood that the meanings of "on", "above", and "over" in the present disclosure should be construed in the broadest manner such that "on" not only means "directly on" something, but also includes the meaning of being "on" something with intervening features or layers therebetween, and "above" or "over" not only means "above" or "over" something, but can also include the meaning of being "above" or "over" something with no intervening features or layers therebetween.

[0035] In addition, spatial relative terms such as "under", "below", "lower", "above", "upper", etc. are used herein for convenience of description to describe the relationship of one element or feature to another or other elements or features, as shown in the drawings. The spatial relative terms are intended to cover different orientations in the use or operation of the device in addition to the orientation depicted in the drawings. The device can be oriented in other ways, and the spatial relative descriptive terms used herein can be similarly interpreted accordingly.

[0036] As Figure 1-8 shown, an embodiment of the present invention provides a puncture biopsy device for hepatology, including a mounting plate 1. The mounting plate 1 is arranged in a "C" shape and a main control module 2 is mounted on the outer side wall.

[0037] In this embodiment, by connecting the main control module 3 to an external CT or B-ultrasound device, processing the data collected by the CT or B-ultrasound device by the main control module 3, and inputting the processed information into this puncture biopsy device to provide operating data support for each driving mechanism of this puncture biopsy device, the automated and precise puncture biopsy operation of this puncture biopsy device can be achieved.

[0038] As Figure 8 shown, a fixed locking assembly 3 is arranged inside the mounting plate 1. The fixed locking assembly 3 includes a first threaded rod 13. A plurality of first threaded rods 13 are uniformly and threadedly connected to the bottom surface of the mounting plate 1. The top end of the first threaded rod 13 extends into the mounting plate 1 and is movably connected to a clamping plate 14. The bottom end of the first threaded rod 13 is fixedly installed with a runner 15.

[0039] In this embodiment, in order to achieve stable use of the puncture biopsy device, medical staff can clamp the mounting plate 1 onto the examination bed or other suitable equipment before use, and rotate the rotating wheel 15 to clamp the clamping plate 14 and the examination bed or other equipment, so that the puncture biopsy device can be firmly and stably fixed, which is convenient for subsequent puncture operations;

[0040] like Figure 3 and 7 As shown, a connecting plate 4 is arranged on the upper side of the mounting plate 1, the connecting plate 4 is arranged in an L shape and is movably connected to two mounting shells 5, a displacement adjustment assembly 6 is arranged on the mounting shell 5, and the displacement adjustment assembly 6 includes a second threaded rod 16, and the second threaded rod 16 is threadedly connected to the lower mounting shell 5, and both ends of the second threaded rod 16 are movably connected to side plates 17, and the side plates 17 are fixedly connected to the mounting plate 1, and one end of the second threaded rod 16 passes through the side plate 17 and is fixedly connected to the first motor 18, and the first motor 18 is fixedly connected to the side plate 17, and threaded holes are opened on the side walls at both ends of the connecting plate 4, and third threaded rods 19 are threadedly connected in the threaded holes, and one end of the third threaded rod 19 extends to the threaded hole and is fixedly connected to the second motor 20, and the two second motors 20 are fixedly connected to the mounting shell 5;

[0041] Furthermore, a slide rail 37 is fixedly connected to the top surface of the mounting plate 1, and a slide groove is provided on the bottom surface of the lower mounting shell 5, and the slide rail 37 is movably connected to the slide groove;

[0042] In this embodiment, in order to adapt the device to the needs of puncture biopsy of different patients and different positions of patients, by driving the first motor 18, the first motor 18 drives the second threaded rod 17 to rotate, the second threaded rod 17 engages with the vertical mounting shell 5, and the mounting shell 5 moves to the specified position along the slide rail 37, and by driving the second motor 20 in the vertical direction, the second motor 20 drives the third threaded rod 19 to engage with the connecting plate 4, so that the connecting plate 4 moves in the vertical mounting shell 5, and the height of the puncture needle is adjusted. By driving the second motor 20 in the horizontal direction, the horizontal position of the puncture needle can be adjusted by rotating the third threaded rod 19 in the horizontal direction, so that the puncture needle can be conveniently and accurately adjusted to the liver position of the patient's body.

[0043] like Figure 1 and 4-6, a fixing ring 7 is fixedly connected to one side of the upper mounting shell 5, a spherical shell 8 is assembled in the fixing ring 7, an angle driving assembly 9 is arranged on the side wall of the fixing ring 7, and the angle driving assembly 9 includes a through groove 21, four through grooves 21 are distributed on the side wall of the fixing ring 7, a movable shell 22 is movably connected in each through groove 21, a rotating shaft 23 is movably connected in the inner cavity of the movable shell 22, a driving wheel 24 and a turbine 25 are fixedly connected to the side wall of the rotating shaft 23, and the side wall of the driving wheel 24 extends out of the movable shell 22 The worm 26 is meshed with the worm gear 26, one end of the worm gear 26 is movably connected to the inner wall of the movable shell 22, the other end of the worm gear 26 is fixedly connected to the third motor 27, the third motor 27 is fixedly connected to the inner wall of the movable shell 22, a first electric push rod 28 is fixedly connected to the side wall of the movable shell 22 away from the driving wheel 24, the other end of the first electric push rod 28 is fixedly connected to a fixing frame 29, and the fixing frame 29 is fixedly connected to the outer wall of the fixing ring 7;

[0044] In this embodiment, in order to realize the precise position puncture biopsy operation of the liver by the puncture needle, the first electric push rod 28 at the interval position is started at the same time, and the first electric push rod 28 pushes the movable shell 22 to move to one side of the spherical shell 8, so that the driving wheel 24 at the symmetrical position is in close contact with the outer wall of the spherical shell 8. At this time, the third motor 27 is started, and the third motor 27 drives the worm 26 to engage the turbine 25 to rotate, and the turbine 25 drives the rotating shaft 23 to rotate, and the rotating shaft 23 drives the driving wheel 24 to rotate. The spherical shell 8 is driven by the driving wheel 24, and the movement control of the spherical shell 8 in the fixed ring 7 can be realized. By continuously controlling the first electric push rod 28 at the interval position and the rotation control of the driving wheel 24, the continuous angle adjustment operation of the spherical shell 8 in the fixed ring 7 can be realized, and the precise adjustment operation of the angle and position of the puncture needle for puncture biopsy is completed, ensuring the accuracy of the puncture biopsy sample;

[0045] like Figure 4 and 5 As shown, a movable ring 10 is provided on the upper side of the ball shell 8, and a puncture needle clamping assembly 11 is provided in the movable ring 10. The puncture needle clamping assembly 11 includes a transverse plate 30. Two transverse plates 30 are symmetrically and movably connected on the movable ring 10. The transverse plates 30 are located in the movable ring 10. One side is fixedly connected with an arc plate 31, and the other side of the two transverse plates 30 is movably connected with the same movable plate 32. The movable plate 32 is concave and the two side walls are inclined. The center of the side wall of the movable plate 32 is fixedly connected with a second electric push rod 33, and the other end of the second electric push rod 33 is fixedly connected to the movable ring 10;

[0046] Furthermore, both sides of the movable plate 32 are provided with inclined grooves 38, and a slider 39 is fixedly connected to the horizontal plate 30, and the slider 39 is inserted into the inclined groove 38 and movably connected to the inclined groove 38;

[0047] In this embodiment, in order to achieve the stability of the puncture needle during the puncture biopsy operation, the medical staff needs to insert the puncture needle from the upper side of the movable ring 10 before performing the puncture biopsy operation, so that the puncture needle passes through the ball shell 8 and passes out from the lower side of the ball shell 8, and then start the second electric push rod 33, the second electric push rod 33 drives the movable plate 32 to move, the movement of the movable plate 32 causes the slider 39 to move in the inclined groove 38, at this time, the horizontal plates 30 on both sides drive the arc plate 31 to clamp the puncture needle, and by controlling the second electric push rod 33, the arc plate 31 ensures that the specified force is continuously clamped on the puncture needle. On the one hand, due to the current setting of the movable plate 32, it can ensure that the puncture needle is clamped concentrically with the movable ring 10 through the arc plate 31, which is convenient for the subsequent precision control of the puncture needle during adjustment. On the other hand, it can effectively ensure the stability of the puncture needle during the puncture process, avoiding the problem of inconvenience in extracting puncture biopsy samples due to abnormal movement of the puncture needle.

[0048] like Figure 3 and 4 As shown, an injection assembly 12 is provided on the movable ring 10, and the injection assembly 12 includes a fourth motor 34, and the fourth motor 34 is fixedly connected to the movable ring 10, and a fourth threaded rod 35 is fixedly connected to the rotor of the fourth motor 34, and the bottom end of the fourth threaded rod 35 is inserted into the ball shell 8 and threadedly connected to the ball shell 8, and a plurality of vertical rods 36 are fixedly connected to the bottom surface of the movable ring 10, and the vertical rods 36 are inserted into the ball shell 8 and movably connected to the ball shell 8;

[0049] In this embodiment, in order to improve the sample extraction accuracy and operation convenience of liver puncture biopsy, after the position and angle of the puncture needle are adjusted in the early stage, the fourth motor 34 is started, and the fourth motor 34 drives the fourth threaded rod 35 to rotate. The fourth threaded rod 35 and the spherical shell 8 are threadedly engaged, so that the movable ring 10 continuously moves toward the side of the spherical shell 8. Because the puncture needle is fixed in the movable ring 10, automatic and stable puncture needle puncture operation can be achieved at this time, and the puncture depth of the puncture needle can be accurately controlled by controlling the fourth motor 34 to complete the accurate puncture biopsy operation of the liver. After the sampling is completed, the reverse rotation control of the fourth motor 34 can be used to achieve stable removal of the puncture needle. Not only is the operation convenient, but also the damage to the patient is effectively reduced, and the use effect is good.

[0050] The present invention covers any substitution, modification, equivalent method and scheme made on the essence and scope of the present invention. In order to make the public have a thorough understanding of the present invention, specific details are described in detail in the following preferred embodiments of the present invention, but those skilled in the art can fully understand the present invention without the description of these details. In addition, in order to avoid unnecessary confusion about the essence of the present invention, well-known methods, processes, procedures, components and circuits are not described in detail.

[0051] A person skilled in the art will appreciate that all or part of the steps in the above-mentioned embodiment method can be completed by instructing related hardware through a program, and the program can be stored in a computer-readable storage medium, such as ROM / RAM, a disk, an optical disk, etc.

[0052] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A puncture biopsy device for liver medicine, comprising a mounting plate (1), characterized in that: The mounting plate (1) is arranged in a "C" shape, and a main control module (2) is installed on the outer side wall. A fixed locking component (3) is arranged inside the mounting plate (1). A connecting plate (4) is arranged on the upper side of the mounting plate (1). The connecting plate (4) is arranged in an L shape and is movably connected to two mounting shells (5). A displacement adjusting component (6) is arranged on the mounting shell (5). A fixed ring (7) is fixedly connected to one side of the upper mounting shell (5). A spherical shell (8) is assembled in the fixed ring (7). An angular driving component (9) is arranged on the side wall of the fixed ring (7). A movable ring (10) is arranged on the upper side of the spherical shell (8). A puncture needle clamping component (11) is arranged inside the movable ring (10). An injection component (12) is arranged on the movable ring (10).

2. A liver puncture biopsy device according to claim 1, characterized in that: The fixed locking component (3) includes a first threaded rod (13). A plurality of first threaded rods (13) are uniformly and threadedly connected to the bottom surface of the mounting plate (1). The top end of the first threaded rod (13) extends into the mounting plate (1) and is movably connected to a clamping plate (14). A runner (15) is fixedly installed at the bottom end of each first threaded rod (13).

3. A liver puncture biopsy device according to claim 2, characterized in that: The displacement adjusting component (6) includes a second threaded rod (16). The second threaded rod (16) is threadedly connected to the lower mounting shell (5). Both ends of the second threaded rod (16) are movably connected to side plates (17). The side plates (17) are fixedly connected to the mounting plate (1). One end of the second threaded rod (16) penetrates through the side plate (17) and is fixedly connected to a first motor (18). The first motor (18) is fixedly connected to the side plate (17). Threaded holes are formed in the side walls at both ends of the connecting plate (4). Third threaded rods (19) are threadedly connected to the threaded holes. One end of the third threaded rod (19) extends out of the threaded hole and is fixedly connected to a second motor (20). The two second motors (20) are fixedly connected to the mounting shell (5).

4. A liver puncture biopsy device according to claim 3, characterized in that: The angle driving assembly (9) comprises a through slot (21), and four through slots (21) are distributed on the side wall of the fixed ring (7), and a movable shell (22) is movably connected in each of the through slots (21), and a rotating shaft (23) is movably connected in the inner cavity of the movable shell (22), and a driving wheel (24) and a turbine (25) are fixedly connected to the side wall of the rotating shaft (23), and the side wall of the driving wheel (24) extends out of the movable shell (22) and is arranged closely to the spherical shell (8), and the rotation direction of adjacent driving wheels (24) is arranged vertically. A worm (26) is meshed on the turbine (25), one end of the worm (26) is movably connected to the inner wall of the movable shell (22), the other end of the worm (26) is fixedly connected to a third motor (27), the third motor (27) is fixedly connected to the inner wall of the movable shell (22), a first electric push rod (28) is fixedly connected to the side wall of the movable shell (22) away from the driving wheel (24), the other end of the first electric push rod (28) is fixedly connected to a fixing frame (29), and the fixing frame (29) is fixedly connected to the outer wall of the fixing ring (7).

5. A liver puncture biopsy device according to claim 4, characterized in that: The puncture needle clamping assembly (11) includes a transverse plate (30), and two transverse plates (30) are symmetrically and movably connected to the movable ring (10). One side of the transverse plate (30) located inside the movable ring (10) is fixedly connected to an arc plate (31), and the other side of the two transverse plates (30) is movably connected to the same movable plate (32). The movable plate (32) is concave and the two side walls are inclined. The center of the side wall of the movable plate (32) is fixedly connected to a second electric push rod (33), and the other end of the second electric push rod (33) is fixedly connected to the movable ring (10).

6. A liver puncture biopsy device according to claim 5, characterized in that: The injection assembly (12) comprises a fourth motor (34), the fourth motor (34) is fixedly connected to the movable ring (10), a fourth threaded rod (35) is fixedly connected to the rotor of the fourth motor (34), the bottom end of the fourth threaded rod (35) is inserted into the spherical shell (8) and is threadedly connected to the spherical shell (8), and a plurality of vertical rods (36) are fixedly connected to the bottom surface of the movable ring (10), the vertical rods (36) are inserted into the spherical shell (8) and are movably connected to the spherical shell (8).

7. A liver puncture biopsy device according to claim 6, characterized in that: A slide rail (37) is fixedly connected to the top surface of the mounting plate (1), and a slide groove is provided on the bottom surface of the mounting shell (5) at the lower side, and the slide rail (37) is movably connected to the slide groove.

8. A liver puncture biopsy device according to claim 7, characterized in that: Both sides of the movable plate (32) are provided with inclined grooves (38), and a sliding block (39) is fixedly connected to the transverse plate (30), and the sliding block (39) is inserted into the inclined groove (38) and movably connected to the inclined groove (38).

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