Thyroid puncture device

Abstract

The invention discloses a thyroid puncture device, and belongs to the technical field of medical instruments, the thyroid puncture device comprises a shell, a puncture assembly, a driving assembly, a limiting assembly and a negative pressure assembly, the driving assembly and the limiting assembly are arranged in the shell, the negative pressure assembly is arranged at the rear end of the shell, and the puncture assembly is assembled on the driving assembly; the tip of a puncture needle of the puncture assembly is of a plugging structure, a strip-shaped cutting hole is formed in the side wall, and a needle base is provided with a locking groove and a limiting groove. The driving assembly drives the puncture needle to conduct constant-speed rotary cutting through transmission of a motor and a multi-stage gear. The limiting assembly adopts a limiting bead, a wedge and a threaded ring to be matched to realize rigid locking of the puncture assembly; the negative pressure assembly and the springback piece form a manual negative pressure structure through the elastic diaphragm, an external negative pressure source is not needed, and the problems that an existing thyroid puncture device is low in safety, inaccurate in sampling, tedious in operation and insufficient in portability are solved.

Description

Technical Field

[0001] This invention belongs to the field of medical device technology, specifically referring to a thyroid puncture device. Background Technology

[0002] Thyroid fine-needle aspiration biopsy is an important minimally invasive method for clinical diagnosis of benign and malignant thyroid nodules, and it is widely used in preoperative screening and pathological diagnosis in endocrinology and breast and thyroid surgery.

[0003] Current thyroid biopsy devices still have many shortcomings in actual clinical use. Traditional sampling methods mostly rely on manual pushing, pulling, or rotating operations, which not only requires high levels of physician experience but also easily leads to problems such as insufficient tissue sample volume and uneven sample fragmentation, directly affecting the accuracy of pathological diagnosis. Existing devices for obtaining negative pressure mostly rely on external negative pressure equipment, which suffers from poor portability, cumbersome operation procedures, and space limitations, failing to meet the needs of rapid biopsy sampling in bedside and emergency scenarios. The overall disassembly, cleaning, and component replacement procedures of the devices are complex, resulting in low clinical efficiency and making it difficult to achieve disposable or rapid disinfection and reuse, increasing clinical operation costs and infection risks. Summary of the Invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a thyroid puncture device that effectively solves the above problems.

[0005] The technical solution adopted by the present invention is as follows: The present invention proposes a thyroid puncture device, including a housing, a puncture component, a driving component, a limiting component, and a negative pressure component. The driving component and the limiting component are disposed inside the housing, the negative pressure component is disposed at the rear end of the housing, and the puncture component is disposed on the driving component. A limiting ring and a threaded groove are provided on the outer wall of the housing. The threaded groove is disposed on one side of the limiting ring. A locking protrusion is also provided on the housing. The locking protrusion is located at the top of the threaded groove. A rotating rod seat is provided inside the housing.

[0006] Preferably, the housing has a high degree of integration, with the internal area rationally divided into driving and limiting installation areas, and the external area equipped with limiting rings, threaded slots, and locking protrusions to achieve precise positioning and assembly of each component. The built-in rotating rod seat provides stable support for the transmission components, ensuring transmission coaxiality. The housing has a regular shape and stable grip, providing a reliable structural foundation for piercing, cutting, and locking.

[0007] Furthermore, the puncture assembly includes a puncture needle, a needle seat, and a plug rod. The puncture needle is disposed on the needle seat, the plug rod is disposed inside the puncture needle, the tip of the puncture needle has a sealing structure, and the front side wall of the puncture needle has a strip-shaped cutting hole.

[0008] Furthermore, one end of the needle holder is provided with a needle receiving end, the other end of the needle holder is provided with a connecting end, the center of the needle holder is provided with a locking groove, and the locking groove is provided with a limiting groove in a ring array, and the puncture needle is provided on the needle receiving end.

[0009] Preferably, the puncture needle tip is sealed and the side wall is provided with a strip cutting hole to avoid direct damage to blood vessels and nerves by the tip, making sampling safer, and the rotary cutting to obtain more complete and uniform samples. The needle hub is designed as an integrated unit, the puncture needle is firmly installed, the negative pressure connection is smooth, and the stopper rod can be used to steadily draw and push out samples. There is no tissue residue during sampling and discharge, and the process is smooth.

[0010] Furthermore, the drive assembly includes a rotating base, a rotating gear, a transmission rod, and a motor. The rotating base rotates at the front end of the housing, the rotating gear is mounted on the rotating base, the transmission rod is mounted on the rotating rod seat, and the motor is fixed to the inner wall of the housing.

[0011] Furthermore, the inner wall of the rotating seat is provided with an inner through hole in a circular array, the rear end of the rotating seat is provided with an extension tube, the bottom of the extension tube is provided with a pressure plate groove, the inner circular array of the pressure plate groove is provided with an upper through hole, the upper through hole communicates with the inner through hole, the end of the extension tube is provided with a gear seat, and the rotating gear is provided on the gear seat.

[0012] Furthermore, the transmission rod is provided with transmission rod gears at both ends, the motor is provided with motor gear and start key, the start key is located on the outer wall of the housing, the motor gear is meshed with the transmission rod gear at one end of the transmission rod, and the transmission rod gear at the other end of the transmission rod is meshed with a rotating gear.

[0013] Furthermore, the limiting component includes a limiting bead, a wedge, and an annular pressure plate. The limiting bead is disposed in the inner through hole, and the wedge is disposed in the upper through hole. The inclined surface of the limiting bead is magnetically attracted to the inclined surface of the wedge. A wedge spring is provided at the non-inclined end of the wedge. The annular pressure plate is disposed in a pressure plate groove. A circular array of pressure plate columns is provided on one side of the annular pressure plate. The pressure plate columns are located on one side of the wedge. The wedge spring... Furthermore, the limiting assembly also includes a lower pressure plate and a threaded ring. The lower pressure plate is attached to the inner wall of the housing, and the threaded ring rotates between the limiting ring and the locking protrusion. The bottom of the lower pressure plate is attached to the annular pressure plate, and the top of the lower pressure plate is provided with a threaded plate. The threaded plate is located in the threaded plate groove, and the side wall of the threaded plate is connected to the inner wall of the threaded ring by a thread.

[0014] Preferably, the limiting bead, wedge, annular pressure plate and threaded ring constitute a rigid locking structure, with inclined magnetic attraction for a firm lock, preventing slippage and deviation during rotational puncture; the threaded ring can be rotated to lock and unlock, making operation simple, and the puncture components can be quickly and efficiently disassembled and assembled. Multi-point annular limiting ensures uniform force distribution, significantly improving puncture positioning accuracy and operational safety.

[0015] Furthermore, the negative pressure assembly includes a negative pressure cover, a negative pressure pipe, and an adapter pipe. The negative pressure pipe is disposed on the negative pressure cover, and the adapter pipe is disposed on the pipe end. The end of the negative pressure pipe is provided with a movable rotating plate, and the end of the adapter pipe is provided with a sealing sheet. The sealing sheet is attached to the movable rotating plate.

[0016] Furthermore, the negative pressure cover is provided with an elastic diaphragm inside, which divides the negative pressure cover into a pressing chamber and an expansion chamber. The side wall of the pressing chamber is provided with a one-way exhaust hole, and the tail of the pressing chamber is provided with a rebound piece. The negative pressure tube is connected to the expansion chamber.

[0017] As a preferred option, the elastic diaphragm-type negative pressure structure does not require an external negative pressure source; a stable negative pressure can be generated simply by pressing it manually, making it highly portable. The design of the rebound sheet and one-way exhaust hole allows for rapid establishment of negative pressure, which can be repeatedly adjusted to meet the requirements of sufficient sampling. The movable rotating plate and sealing sheet provide dynamic sealing, maintaining good sealing performance even when rotating, resulting in accurate tissue adsorption and high sampling efficiency.

[0018] The beneficial effects achieved by the present invention using the above structure are as follows: 1. The tip of the puncture needle is sealed and a strip-shaped cutting hole is opened on the side wall to avoid direct damage to blood vessels and nerves by the needle tip, which greatly reduces the puncture risk.

[0019] 2. It adopts a rigid locking structure with limit beads, wedges and threaded rings to fix the piercing components firmly, so that it does not slip or deviate during rotary cutting, and the sampling position is accurate and controllable.

[0020] 3. The motor-driven automatic rotary cutting, combined with the built-in manual negative pressure, ensures stable tissue adsorption and uniform cutting, allowing for the rapid acquisition of sufficient and complete samples without the need for an external negative pressure source. Attached Figure Description

[0021] Figure 1 This is a three-dimensional cross-sectional view of a thyroid biopsy device proposed in this invention; Figure 2 This is an exploded view of a thyroid biopsy device proposed in this invention; Figure 3 This is a front view of a thyroid biopsy device proposed in this invention; Figure 4 for Figure 2 A cross-sectional view along the cutting line AA; Figure 5 for Figure 2 A cross-sectional view along the cutting line BB; Figure 6 for Figure 5 A cross-sectional view along the section line CC; Figure 7 for Figure 5 A cross-sectional view along the cutting line DD; Figure 8 for Figure 6 A cross-sectional view along the cutting line EE; Figure 9 This is a schematic diagram of the needle hub of a thyroid puncture device proposed in this invention; Figure 10 This is a schematic diagram of the rotating seat of a thyroid puncture device proposed in this invention.

[0022] Among them, 1. Housing, 11. Limiting ring, 12. Threaded groove, 13. Locking protrusion, 14. Rotating rod seat, 2. Puncture assembly, 21. Puncture needle, 211. Strip cutting hole, 22. Needle seat, 221. Needle receiving end, 222. Connecting end, 223. Locking groove, 224. Limiting groove, 23. Plug rod, 3. Drive assembly, 31. Rotating seat, 311. Inner through hole, 312. Upper through hole, 313. Pressure plate groove, 314. Extension tube, 315. Gear seat, 32. Rotating gear, 33. Transmission rod, 331. Transmission 34. Gear lever, 341. Motor gear, 342. Start button, 4. Limiting assembly, 41. Limiting bead, 42. Wedge, 421. Wedge spring, 43. Annular pressure plate, 431. Pressure plate column, 44. Lower pressure plate, 441. Threaded plate, 45. Threaded ring, 5. Negative pressure assembly, 51. Negative pressure cover, 511. Elastic diaphragm, 512. Pressing chamber, 5121. One-way exhaust hole, 513. Expansion chamber, 514. Rebound plate, 52. Negative pressure pipe, 521. Movable rotating plate, 53. Adaptor pipe, 531. Sealing plate.

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the embodiments of the invention to explain the invention and do not constitute a limitation thereof. Detailed Implementation

[0024] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0025] In the description of this invention, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0026] like Figures 1-10 As shown, the present invention proposes a thyroid puncture device, including a housing 1, a puncture component 2, a drive component 3, a limiting component 4, and a negative pressure component 5. The drive component 3 and the limiting component 4 are disposed inside the housing 1, the negative pressure component 5 is disposed at the rear end of the housing 1, and the puncture component 2 is disposed on the drive component 3. A limiting ring 11 and a threaded groove 12 are provided on the outer wall of the housing 1. The threaded groove 12 is disposed on one side of the limiting ring 11. A locking protrusion 13 is also provided on the housing 1. The locking protrusion 13 is located at the top of the threaded groove 12. A rotating rod seat 14 is provided inside the housing 1.

[0027] The puncture assembly 2 includes a puncture needle 21, a needle seat 22, and a plug rod 23. The puncture needle 21 is disposed on the needle seat 22, and the plug rod 23 is disposed inside the puncture needle 21. The tip of the puncture needle 21 has a sealing structure, and the front side wall of the puncture needle 21 has a strip-shaped cutting hole 211.

[0028] The needle holder 22 has a needle receiving end 221 at one end and a connecting end 222 at the other end. The center of the needle holder 22 has a locking groove 223, and the locking groove 223 has a ring array of limiting grooves 224. The puncture needle 21 is placed on the needle receiving end 221.

[0029] The drive assembly 3 includes a rotating base 31, a rotating gear 32, a transmission rod 33, and a motor 34. The rotating base 31 rotates at the front end of the housing 1, the rotating gear 32 is mounted on the rotating base 31, the transmission rod 33 is mounted on the rotating rod seat 14, and the motor 34 is fixed on the inner wall of the housing 1.

[0030] The inner wall of the rotating seat 31 is provided with an inner through hole 311 in a circular array. The rear end of the rotating seat 31 is provided with an extension tube 314. The bottom of the extension tube 314 is provided with a pressure plate groove 313. The inner circular array of the pressure plate groove 313 is provided with an upper through hole 312. The upper through hole 312 communicates with the inner through hole 311. The end of the extension tube 314 is provided with a gear seat 315. The rotating gear 32 is provided on the gear seat 315.

[0031] The transmission rod 33 has transmission rod gears 331 at both ends, and the motor 34 has a motor gear 341 and a start key 342. The start key 342 is located on the outer wall of the housing 1. The motor gear 341 is meshed with the transmission rod gear 331 at one end of the transmission rod 33, and the transmission rod gear 331 at the other end of the transmission rod 33 is meshed with the rotating gear 32.

[0032] The limiting component 4 includes a limiting bead 41, a wedge 42, and an annular pressure plate 43. The limiting bead 41 is disposed in the inner through hole 311, and the wedge 42 is disposed in the upper through hole 312. The inclined surface of the limiting bead 41 is magnetically attracted to the inclined surface of the wedge 42. A wedge spring 421 is provided at the non-inclined end of the wedge 42. The annular pressure plate 43 is disposed in the pressure plate groove 313. A circular array of pressure plate posts 431 is provided on one side of the annular pressure plate 43. The pressure plate posts 431 are located on one side of the wedge 42. The wedge spring 421... The limiting assembly 4 also includes a lower pressure plate 44 and a threaded ring 45. The lower pressure plate 44 is attached to the inner wall of the housing 1, and the threaded ring 45 rotates between the limiting ring 11 and the locking protrusion 13. The bottom of the lower pressure plate 44 is attached to the annular pressure plate 43, and the top of the lower pressure plate 44 is provided with a threaded piece 441. The threaded piece 441 is located in the threaded piece groove 12, and the side wall of the threaded piece 441 is connected to the inner wall of the threaded ring 45 by threads.

[0033] The negative pressure assembly 5 includes a negative pressure cover 51, a negative pressure pipe 52, and an adapter pipe 53. The negative pressure pipe 52 is located on the negative pressure cover 51, and the adapter pipe 53 is located on the adapter end 222. The end of the negative pressure pipe 52 is provided with a movable rotating plate 521, and the end of the adapter pipe 53 is provided with a sealing plate 531. The sealing plate 531 is attached to the movable rotating plate 521.

[0034] The negative pressure cover 51 has an elastic diaphragm 511 inside, which divides the negative pressure cover 51 into a pressing chamber 512 and an expansion chamber 513. The side wall of the pressing chamber 512 has a one-way exhaust hole 5121, and the tail of the pressing chamber 512 has a spring plate 514. The negative pressure tube 52 is connected to the expansion chamber 513.

[0035] In practical use, the plug rod 23 is inserted into the puncture needle 21, and the puncture needle 21 is fixed to the needle receiving end 221 of the needle seat 22. Then, the needle seat 22 is placed into the rotating seat 31, so that the locking groove 223 of the needle seat 22 corresponds to the position of the inner through hole 311. The threaded ring 45 is rotated, and the threaded engagement between the threaded plate 441 and the threaded ring 45 drives the threaded plate 441 to move along the threaded plate groove 12 toward the puncture needle 21, thereby pushing the lower pressure plate 44 to move down along the inner wall of the housing 1. The bottom of the lower pressure plate 44 is attached to the annular pressure plate 43 and... Applying downward pressure causes the annular pressure plate 43 to move downward within the pressure plate groove 313. The pressure plate column 431 pushes the wedge 42 to move inward and compresses the wedge spring 421. As the wedge 42 moves inward, the inclined surface of the wedge 42 magnetically attracts the limiting bead 41 to move inward through the inner through hole 311. Finally, the limiting bead 41 is locked into the limiting groove 224 in the locking groove 223 of the needle seat 22, completing the rigid locking of the puncture assembly 2 and the rotating seat 31, preventing the puncture assembly 2 from slipping or shifting during the puncture process. After locking, the rotating threaded ring 45 stops rotating.

[0036] Based on the patient's thyroid examination results, medical staff determine the puncture sampling location. Holding the housing 1, they align the tip of the puncture needle 21 with the predetermined puncture site, ensuring the needle 21 is perpendicular to the site or at a preset angle, avoiding contact with surrounding blood vessels or nerves. The medical staff slowly and steadily push the device towards the puncture site. Once the needle 21 reaches the predetermined sampling location, the medical staff presses the rebound plate 514 of the negative pressure cover 51 with their fingers. The rebound plate 514 compresses the pressing chamber 512, which then... The gas is discharged to the outside through the one-way exhaust port 5121. After the finger is released, the rebound plate 514 rebounds, creating a negative pressure inside the pressing chamber 512. As a result, the elastic diaphragm 511 undergoes elastic deformation to one side of the pressing chamber 512. At this time, the volume of the expansion chamber 513 inside the negative pressure cover 51 increases, creating a negative pressure inside. The negative pressure is transmitted to the puncture needle 21 through the negative pressure tube 52 and the adapter tube 53, causing the stopper rod 23 to move upward. Under the action of the negative pressure, the strip-shaped cutting hole 211 of the puncture needle 21 draws in the thyroid tissue sample.

[0037] Medical staff press the motor start button 342 on the outer wall of the housing 1 to start the motor 34. The motor 34 rotates and drives the motor gear 341 to rotate. The motor gear 341 meshes with the transmission rod gear 331 at one end of the transmission rod 33, causing the transmission rod 33 to rotate around the rotating rod seat 14. The transmission rod gear 331 at the other end of the transmission rod 33 rotates synchronously and meshes with the rotating gear 32, thereby driving the rotating seat 31 to rotate at a constant speed around the front end of the housing 1. The rotating puncture needle 21 performs rotary cutting on the thyroid tissue through the strip-shaped cutting hole 211 on the front side wall, realizing the initial cutting and separation of the tissue sample. The operation of pressing and releasing the negative pressure cover 51 can be repeated until a sufficient amount of thyroid tissue sample is obtained. During the sampling process, the position of the puncture needle 21 is kept fixed to avoid displacement.

[0038] After the tissue sample is collected, first press the motor start button 342 to turn off the motor 34, then pull out the puncture needle 21. Reverse the threaded ring 45, using the threaded engagement to move the threaded plate 441 upwards along the threaded plate groove 12. The lower pressure plate 44 moves upwards accordingly, releasing the downward pressure on the annular pressure plate 43. Pull the needle seat 22 out of the rotating seat 31, then pull out the plug rod 23 inside the puncture needle 21. Slowly push the thyroid tissue sample from the puncture needle 21 into the sample storage container using the pusher, completing the sample collection. After labeling the sample, send it to the testing department. After sample collection, soak and rinse it with medical disinfectant to remove residual tissue, then air dry it for later use.

[0039] It should be noted that, in this document, the terms “comprising,” “including,” or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0040] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention.

[0041] The present invention and its embodiments have been described above. This description is not restrictive, and the accompanying drawings are only one embodiment of the present invention; the actual structure is not limited thereto. In conclusion, if those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, such designs should fall within the protection scope of the present invention.

Claims

1. A thyroid biopsy device, characterized in that: It includes a housing (1), a puncture assembly (2), a drive assembly (3), a limiting assembly (4), and a negative pressure assembly (5). The drive assembly (3) and the limiting assembly (4) are located inside the housing (1), the negative pressure assembly (5) is located at the rear end of the housing (1), and the puncture assembly (2) is located on the drive assembly (3). The outer wall of the housing (1) is provided with a limiting ring (11) and a threaded groove (12). The threaded groove (12) is located on one side of the limiting ring (11). The housing (1) is also provided with a locking protrusion (13). The locking protrusion (13) is located at the top of the threaded groove (12). The housing (1) is provided with a rotating rod seat (14).

2. The thyroid biopsy device according to claim 1, characterized in that: The puncture assembly (2) includes a puncture needle (21), a needle seat (22), and a plug rod (23). The puncture needle (21) is located on the needle seat (22), and the plug rod (23) is located inside the puncture needle (21). The tip of the puncture needle (21) is a sealing structure, and the front side wall of the puncture needle (21) is provided with a strip-shaped cutting hole (211).

3. A thyroid biopsy device according to claim 2, characterized in that: The needle holder (22) has a needle receiving end (221) at one end and a connecting end (222) at the other end. The needle holder (22) has a locking groove (223) at the center and a limiting groove (224) in a ring array inside the locking groove (223). The puncture needle (21) is located on the needle receiving end (221).

4. A thyroid biopsy device according to claim 3, characterized in that: The drive assembly (3) includes a rotating seat (31), a rotating gear (32), a transmission rod (33), and a motor (34). The rotating seat (31) rotates at the front end of the housing (1), the rotating gear (32) is mounted on the rotating seat (31), the transmission rod (33) is mounted on the rotating rod seat (14), and the motor (34) is fixed on the inner wall of the housing (1).

5. A thyroid biopsy device according to claim 4, characterized in that: The inner wall of the rotating seat (31) is provided with an inner through hole (311) in a circular array. The rear end of the rotating seat (31) is provided with an extension tube (314). The bottom of the extension tube (314) is provided with a pressure plate groove (313). The inner circular array of the pressure plate groove (313) is provided with an upper through hole (312). The upper through hole (312) communicates with the inner through hole (311). The end of the extension tube (314) is provided with a gear seat (315). The rotating gear (32) is provided on the gear seat (315).

6. A thyroid biopsy device according to claim 5, characterized in that: The transmission rod (33) has transmission rod gears (331) at both ends, and the motor (34) has a motor gear (341) and a start key (342). The start key (342) is located on the outer wall of the housing (1). The motor gear (341) is meshed with the transmission rod gear (331) at one end of the transmission rod (33), and the transmission rod gear (331) at the other end of the transmission rod (33) is meshed with the rotating gear (32).

7. A thyroid biopsy device according to claim 6, characterized in that: The limiting component (4) includes a limiting bead (41), a wedge (42) and an annular pressure plate (43). The limiting bead (41) is located in the inner through hole (311), and the wedge (42) is located in the upper through hole (312). The inclined surface of the limiting bead (41) is magnetically attracted to the inclined surface of the wedge (42). The non-inclined end of the wedge (42) is provided with a wedge spring (421). The annular pressure plate (43) is located in the pressure plate groove (313). A circular array of pressure plate columns (431) is provided on one side of the annular pressure plate (43). The pressure plate columns (431) are located on one side of the wedge (42), and the end of the wedge spring (421) is attached to the annular pressure plate (43).

8. A thyroid biopsy device according to claim 7, characterized in that: The limiting component (4) further includes a lower pressure plate (44) and a threaded ring (45). The lower pressure plate (44) is attached to the inner wall of the housing (1). The threaded ring (45) rotates between the limiting ring (11) and the locking protrusion (13). The bottom of the lower pressure plate (44) is attached to the annular pressure plate (43). The top of the lower pressure plate (44) is provided with a threaded piece (441). The threaded piece (441) is located in the threaded piece groove (12), and the side wall of the threaded piece (441) is connected to the inner wall of the threaded ring (45) by a thread.

9. A thyroid biopsy device according to claim 8, characterized in that: The negative pressure assembly (5) includes a negative pressure cover (51), a negative pressure pipe (52), and a connecting pipe (53). The negative pressure pipe (52) is located on the negative pressure cover (51), and the connecting pipe (53) is located on the connecting pipe end (222). The end of the negative pressure pipe (52) is provided with a movable rotating plate (521), and the end of the connecting pipe (53) is provided with a sealing plate (531). The sealing plate (531) is attached to the movable rotating plate (521).

10. A thyroid puncture device according to claim 9, characterized in that: The negative pressure cover (51) is provided with an elastic diaphragm (511) inside. The elastic diaphragm (511) divides the negative pressure cover (51) into a pressing chamber (512) and an expansion chamber (513). The side wall of the pressing chamber (512) is provided with a one-way exhaust hole (5121). The tail of the pressing chamber (512) is provided with a rebound piece (514). The negative pressure tube (52) is connected to the expansion chamber (513).

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