Negative pressure suction device for puncture biopsy

Abstract

The negative pressure suction device for puncture biopsy comprises a tube body, a hollow puncture needle, a puncture needle core, a piston rod, a rubber piston sleeve, a piston driving rod and a gear component. A partition is arranged in the tube body, the puncture needle is installed on the needle connecting tube, the piston driving rod is inserted in the piston driving rod insertion hole, the piston rod is inserted in the piston rod insertion hole, the rubber piston sleeve is sleeved on the front end of the piston rod, the gear component is rotatably installed on the tube body, the piston rod comprises piston rod teeth, the piston driving rod comprises piston driving rod teeth, a piston rod needle core insertion hole is arranged on the piston rod, a rubber piston sleeve needle core insertion hole is arranged on the rubber piston sleeve, a puncture needle core positioning piece is arranged on the side of the tube body, a puncture needle core positioning hole is arranged on the puncture needle core positioning piece, a puncture needle core positioning plug rod is arranged on the puncture needle core positioning plug rod, a puncture needle core driving head is arranged on the puncture needle core positioning plug rod, and the upper end of the puncture needle core is fixed on the puncture needle core driving head, so that the puncture needle core can be pulled out smoothly and labor-savingly.

Description

Technical Field

[0001] The invention relates to a negative pressure suction device for puncture biopsy. Background Art

[0002] With the continuous development of medical technology, ultrasound-guided fine needle aspiration cytology biopsy has been increasingly used in daily medical care in recent years. The puncture needle is an indispensable tool. This method is used under ultrasound monitoring to obtain superficial organ tissue target cells for pathological diagnosis, such as breast, thyroid, lymph nodes, etc., through the puncture needle. It is the fastest, simplest and safest method for early diagnosis of benign and malignant targets.

[0003] Compared with previous histological biopsy, it has the advantages of less damage, less risk, and equally reliable results. However, with the development of clinical work, a new problem has emerged: the specific tissue composition of the lesion determines its physical properties, which may be soft, tough, hard, or relatively sticky.

[0004] For soft lesions, it is easy to extract cells from the lesion through a puncture needle. However, for lesions that are tough, hard, or sticky, it is difficult to extract cells with diagnostic value simply by using a puncture needle, resulting in unsatisfactory puncture results.

[0005] If appropriate external negative pressure suction can be combined during the puncture needle insertion and lifting process, the success rate will be greatly improved. However, in actual work, it is very difficult to perform external negative pressure suction during the puncture needle insertion and lifting process. During puncture, the operator usually holds the ultrasound probe in his left hand for real-time monitoring and holds the puncture needle in his right hand for tissue puncture and lifting. At this time, the operator himself cannot achieve negative pressure suction while lifting and inserting the puncture needle. If an assistant holds a syringe at the tail of the puncture needle for auxiliary negative pressure suction, the coordination of the two people will be a big problem, and it is difficult to achieve coordination and consistency of the movement amplitude and frequency. Since the movement amplitude of extracting diseased cells is small and needs to be precise, the risk of puncture will be greatly increased if an assistant assists in negative pressure suction.

[0006] In addition, the puncture needle head of the puncture needle is a hollow structure and can be equipped with a puncture needle core. The puncture needle core is a solid body and just fills the hollow part of the puncture needle head. The function of the puncture needle core is to prevent tissue debris and other non-target tissues from entering the hollow part of the puncture needle head during the puncture process, thereby interfering with the diagnosis results.

[0007] In the past, few puncture needles have the function of being able to pull out the puncture needle core in combination with appropriate external negative pressure suction during the one-handed operation.

[0008] The most important thing is that one end of the puncture needle core is bent and fixed on the tube body. During the process of pulling out the puncture needle core, the puncture needle core is always in a bent state, which makes the puncture needle core not pulled out smoothly and has relatively high requirements on the material of the needle core. Summary of the invention

[0009] In view of the above technical problems, the present invention provides a device for extracting tissue and organ cells, in which the puncture needle core does not need to be bent and can be operated by one person with one hand to introduce negative pressure suction and the puncture needle core can be smoothly pulled out.

[0010] In order to solve the above technical problems, a negative pressure suction device for puncture biopsy includes a tube body, a hollow puncture needle, a puncture needle core, a piston rod, a rubber piston sleeve, a piston driving rod and a gear component. The front end of the tube body is closed and provided with a front opening, the rear end of the tube body has an opening, a partition is provided in the tube body, and the partition divides the space in the tube body into a piston rod socket and a piston driving rod socket, the front end of the tube body is provided with a needle connecting tube, the puncture needle is installed on the needle connecting tube, the puncture needle, the needle connecting tube and the piston rod socket are connected, the piston driving rod is inserted in the piston driving rod socket, and the piston rod is inserted in the piston rod socket. The rubber piston sleeve is arranged on the front end of the piston rod, and the rubber piston sleeve is in abutment with the inner wall of the piston rod socket. The gear component is rotatably installed on the tube body above the partition. The piston rod includes piston rod teeth, and the piston driving rod includes piston driving rod teeth. The piston rod teeth and the piston driving rod teeth are arranged opposite to each other. The gear component is located between the piston rod teeth and the piston driving rod teeth. The piston rod teeth and the piston driving rod teeth are both meshed with the gear component. The piston rod is provided with a piston rod needle core socket, and the rubber piston sleeve is provided with a rubber piston sleeve needle core socket The puncture needle core is inserted into the piston rod needle core socket, the rubber piston sleeve needle core socket, the needle connecting tube and the puncture needle. A puncture needle core positioning piece is provided on the side of the tube body. A puncture needle core positioning socket is provided on the puncture needle core positioning piece. A puncture needle core positioning plug rod is provided on the puncture needle core positioning socket. The puncture needle core positioning plug rod can move up and down in the puncture needle core positioning socket. A puncture needle core driving head is provided on the puncture needle core positioning plug rod. The upper end of the puncture needle core is fixed on the puncture needle core driving head, and the puncture needle core positioning plug rod is parallel to the puncture needle core.

[0011] That is to say, it is a tubular structure, and the front end is a tubular hollow structure used to connect to the tail of the puncture needle; most of the device is a hollow tubular structure, and there is a longitudinal plane partition plate in the tube, which divides the hollow part in the tube longitudinally into two spaces, one of which leads to the tubular hollow structure at the front end, and has a piston-like structure inside, which fits tightly to the tube wall, and the separation side of the piston has a serrated structure that meshes with the gear fixed on the tube body above the partition plate; in the other side space, there is a rod body driving rod structure with a similar structure, and the separation side also has a serrated structure, which also meshes with the gear. The rod body is pressed down to drive the rod, and through the gear transmission, the piston on the opposite side moves upward, and drives the puncture needle core to move upward, generating negative pressure, and sucking superficial tissue and organ cells into the puncture needle.

[0012] The beneficial effect of the negative pressure suction device for puncture biopsy provided by the present invention is that when in use, the puncture needle is inserted into the superficial tissue and organ cells, and then the piston driving rod is pressed, the piston driving rod teeth on the piston driving rod move downward to drive the gear component to rotate, the gear component rotates to drive the piston rod teeth and the piston rod to move upward, the piston rod moves upward to drive the rubber piston sleeve to move upward, and when the piston rod moves upward, it drives the puncture needle core driving head to move upward, the puncture needle core driving head moves upward to drive the puncture needle core and the puncture needle core positioning rod to move upward, when the puncture needle core leaves the puncture needle head, the rubber piston sleeve moves upward to generate negative pressure in the puncture needle head, so that the superficial tissue and organ cells are sucked into the puncture needle, so that the superficial tissue and organ cells can be extracted with one hand. That is to say, the operator can lift and insert the puncture needle and pull out the puncture needle core by himself while performing negative pressure suction, and the action is precise, avoiding the difficulty of external negative pressure suction during the puncture and insertion of the puncture needle, the difficulty of coordinating the negative pressure suction assisted by an assistant, and the inconsistency of the coordination of the action amplitude and frequency, thereby avoiding danger during puncture, and preventing tissue debris and other non-target tissues from entering the hollow part of the puncture needle head to interfere with the diagnosis result. In addition, the puncture needle core is no longer in a bent state, but in a straight state. The puncture needle core is parallel to the puncture needle core positioning rod, so that the puncture needle core is pulled out smoothly and labor-savingly, and the puncture needle core positioning rod will not swing left and right under the positioning of the puncture needle core positioning hole, so that the puncture needle core is pulled out more smoothly and labor-savingly.

[0013] Furthermore, a puncture needle core positioning rod stopping component is provided on the puncture needle core positioning member, and the puncture needle core positioning rod stopping component cooperates with the puncture needle core positioning rod. The beneficial effect is that by providing the puncture needle core positioning rod stopping component, a certain resistance can be provided to the puncture needle core positioning rod, thereby preventing the puncture needle core positioning rod from being displaced under its own gravity.

[0014] Furthermore, a stop-retraction component mounting column is provided on the puncture needle core positioning component, and the stop-retraction component of the puncture needle core positioning rod includes a stop-retraction component pressure piece, a stop-retraction component support spring, a stop-retraction component retaining spring and a stop-retraction component pressure ball, a stop-retraction component pressure piece sleeve hole is provided on the stop-retraction component pressure piece, a stop-retraction component mounting column is provided with a stop-retraction component mounting column slot, and the stop-retraction component pressure piece is sleeved on the stop-retraction component mounting column. The retaining spring of the stop component is clamped on the retaining groove of the retaining component mounting column, the retaining component supporting spring is sleeved on the retaining component mounting column, the retaining component supporting spring is located between the retaining spring of the stop component and the retaining component pressing piece, one end of the retaining component supporting spring abuts against the retaining spring of the stop component, the other end of the retaining component supporting spring abuts against the retaining component pressing piece, the retaining component pressing ball is installed on the retaining component pressing piece, the retaining component pressing ball abuts and cooperates with the puncture needle core positioning rod. The beneficial effect is that this structure can not only provide a certain resistance to the puncture needle core positioning rod, but also prevent the puncture needle core positioning rod from being stuck by the retaining component of the puncture needle core positioning rod.

[0015] Furthermore, a driving head puncture needle core plug hole is provided at the bottom of the puncture needle core driving head, a driving head puncture needle core fixing threaded hole is provided on the side of the puncture needle core driving head, the driving head puncture needle core fixing threaded hole is communicated with the driving head puncture needle core plug hole, a puncture needle core fixing screw is provided on the driving head puncture needle core fixing threaded hole, the upper end of the puncture needle core is inserted into the driving head puncture needle core plug hole, and the front end of the puncture needle core fixing screw is in contact with the puncture needle core.

[0016] The beneficial effect is that this structure allows the puncture needle core to be firmly fixed to the puncture needle core driving head, preventing the puncture needle core from being separated, and the puncture needle core is convenient and simple to install on the puncture needle core driving head.

[0017] The piston rod is provided with a piston driving rod body, a piston driving rod tooth plate and a piston driving rod tooth plate fixing screw, the piston driving rod body is provided with a piston driving rod body groove, the piston driving rod body groove is provided with a piston driving rod body groove threaded hole, the piston rod tooth plate is provided with a piston driving rod tooth plate screw hole, the piston rod tooth plate is screwed into the piston rod body groove threaded hole through the piston rod tooth plate fixing screw, and is installed on the piston rod body groove, the piston rod tooth is arranged on the piston rod tooth plate, and the piston driving rod comprises a piston driving rod body, a piston driving rod tooth plate and a piston driving rod tooth plate fixing screw, the piston driving rod body is provided with a piston driving rod body groove, the piston driving rod body groove is provided with a piston driving rod body groove threaded hole, the piston driving rod tooth plate is provided with a piston driving rod tooth plate screw hole, and the piston driving rod tooth plate passes through the piston belt through the piston driving rod tooth plate fixing screw The screw hole of the moving rod tooth plate is screwed into the threaded hole of the piston driving rod body groove and is installed on the groove of the piston driving rod body. The piston driving rod tooth is arranged on the piston driving rod tooth plate. The gear component includes a gear shaft and a gear. The tube body is provided with a gear shaft mounting threaded hole, and the gear shaft is provided with a gear shaft thread. The gear shaft is installed on the gear shaft mounting threaded hole, and the gear shaft mounting threaded hole matches the gear shaft thread. The gear is rotatably sleeved on the gear shaft, and the piston rod teeth and the piston driving rod teeth are both meshed with the gear. The piston rod body is provided with a gear left limit strip and a gear right limit strip, and the left side of the gear abuts and cooperates with the gear left limit strip, and the right side of the gear abuts and cooperates with the gear right limit strip. The beneficial effect is that this structure makes the cooperation between the piston rod and the piston driving rod stable, prevents the gear from slipping, and can limit the left and right movement of the gear to prevent the gear from being stuck by friction with the inner wall of the tube body.

[0018] Furthermore, a rubber piston sleeve plug is provided at the front end of the piston rod, a rubber piston sleeve limiting convex ring is provided on the rubber piston sleeve plug, a rubber piston sleeve limiting concave ring is provided on the inner wall of the rubber piston sleeve, the rubber piston sleeve limiting convex ring enters the rubber piston sleeve limiting concave ring, a rubber piston sleeve sealing convex ring is provided on the outer surface of the rubber piston sleeve, and the rubber piston sleeve sealing convex ring is abutted and matched with the inner wall of the piston rod socket. The beneficial effect is that this structure makes the installation of the rubber piston sleeve more stable, the rubber piston sleeve abuts against the inner wall of the piston rod socket more closely, and the negative pressure effect is better.

[0019] Furthermore, a pressing collar is provided on the piston driving rod, and a left hook and a right hook are provided on both sides of the tube body respectively, wherein the pressing collar is mounted on the piston driving rod by screws, making it more convenient to use.

[0020] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is one of the structural schematic diagrams of the negative pressure suction device for puncture biopsy provided by the present invention.

[0022] Figure 2 This is the second structural schematic diagram of the negative pressure suction device for puncture biopsy provided by the present invention.

[0023] Figure 3 It is one of the cross-sectional structural schematic diagrams of the negative pressure suction device for puncture biopsy provided by the present invention.

[0024] Figure 4 This is the second schematic cross-sectional view of the negative pressure suction device for puncture biopsy provided by the present invention.

[0025] Figure 5 It is one of the partially enlarged structural schematic diagrams of the negative pressure suction device for puncture biopsy provided by the present invention.

[0026] Figure 6 This is the second partially enlarged structural schematic diagram of the negative pressure suction device for puncture biopsy provided by the present invention.

[0027] Figure 7 This is the third partially enlarged structural schematic diagram of the negative pressure suction device for puncture biopsy provided by the present invention.

[0028] Figure 8 It is one of the partial cross-sectional enlarged structural schematic diagrams of the negative pressure suction device for puncture biopsy provided by the present invention.

[0029] Fig. 9 This is the second partial cross-sectional enlarged structural schematic diagram of the negative pressure suction device for puncture biopsy provided by the present invention.

[0030] Fig.10 This is one of the schematic diagrams of the exploded structure of the negative pressure suction device for puncture biopsy provided by the present invention.

[0031] Fig.11 This is the second schematic diagram of the exploded structure of the negative pressure suction device for puncture biopsy provided by the present invention.

[0032] Fig.12 This is the third schematic diagram of the exploded structure of the negative pressure suction device for puncture biopsy provided by the present invention.

[0033] Fig.13 This is one of the schematic diagrams of the structure of some components of the negative pressure suction device for puncture biopsy provided by the present invention.

[0034] Fig.14 This is the second schematic diagram of the structure of some components of the negative pressure suction device for puncture biopsy provided by the present invention.

[0035] Fig.15 It is a schematic diagram of the enlarged structure of some components of the negative pressure suction device for puncture biopsy provided by the present invention. DETAILED DESCRIPTION

[0036] As shown in Figure 1 Fig.15 As shown, an embodiment of the negative pressure suction device for puncture biopsy provided by the present invention comprises a tube body 1, a hollow puncture needle 2, a puncture needle core 2-1, a piston rod 3, a rubber piston sleeve 4, a piston driving rod 5 and a gear component 6. The front end of the tube body 1 is closed and provided with a front opening, and the rear end of the tube body 1 has an opening, that is, the tube body 1 is syringe-like, and a partition 7 is provided in the tube body 1. The partition 7 divides the space in the tube body 1 into a piston rod insertion hole 8 and a piston driving rod insertion hole 9. The front end of the tube body 1 is provided with a needle connecting tube 10, and the puncture needle 2 is installed on the needle connecting tube 10. The puncture needle 2, the needle connecting tube 10 and the piston rod insertion hole 8 are connected, the piston driving rod 5 is inserted in the piston driving rod insertion hole 9, and the piston rod 3 is inserted in the piston rod insertion hole 8. The rubber piston sleeve 4 is sleeved on the front end of the piston rod 3, and the rubber piston sleeve 4 is abutted against the inner wall of the piston rod socket 8. The gear component 6 is rotatably installed on the tube body 1 above the partition 7. The piston rod 3 includes a piston rod tooth 11, and the piston driving rod 5 includes a piston driving rod tooth 12. The piston rod tooth 11 and the piston driving rod tooth 12 are arranged opposite to each other. The gear component 6 is located between the piston rod tooth 11 and the piston driving rod tooth 12, and the piston rod tooth 11 and the piston driving rod tooth 12 are both meshed with the gear component 6. The piston rod 3 is provided with a piston rod needle core socket 3-1, and the rubber piston sleeve 4 is provided with a rubber piston sleeve needle core socket 4-1. The puncture needle core 2- 1 is inserted into the piston rod needle core socket 3-1, the rubber piston sleeve needle core socket 4-1, the needle connecting tube 10 and the puncture needle 2, the side of the tube body 1 is provided with a puncture needle core positioning piece 1-1, the puncture needle core positioning piece 1-1 is provided with a puncture needle core positioning socket 1-2, the puncture needle core positioning socket 1-2 is provided with a puncture needle core positioning rod 1-3, the puncture needle core positioning rod 1-3 can move up and down in the puncture needle core positioning socket 1-2, the puncture needle core positioning rod 1-3 is provided with a puncture needle core driving head 1-4, the upper end of the puncture needle core 2-1 is fixed on the puncture needle core driving head 1-4, and the puncture needle core positioning rod 1-3 is parallel to the puncture needle core 2-1.

[0037] The puncture needle core positioning piece 1-1 is square, the puncture needle core positioning hole 1-2 is a square hole, the puncture needle core positioning rod 1-3 is a square rod, the puncture needle core positioning piece 1-1 and the tube body can be integrally formed, or the puncture needle core positioning piece 1-1 can be fixed to the tube body 1 by screws or glue, the puncture needle core driving head 1-4 and the puncture needle core positioning rod 1-3 are integrally formed, and the puncture needle core driving head 1-4 is located above the piston rod 3.

[0038] The puncture needle core positioning member 1-1 is provided with a puncture needle core positioning rod stopper 1-5, and the puncture needle core positioning rod stopper 1-5 cooperates with the puncture needle core positioning rod 1-3. The puncture needle core positioning member 1-1 is provided with a stopper mounting column 1-6, and the puncture needle core positioning rod stopper 1-5 includes a stopper pressing member 1-7, a stopper supporting spring 1-8, a stopper retaining spring 1-9 and a stopper pressing ball 1-10, and the stopper pressing member 1-7 is provided with a stopper pressing member sleeve hole 1-11, and the stopper mounting column 1-6 is provided with a stopper mounting column slot 1-12, and the stopper pressing member 1-7 is sleeved on the stopper mounting column 1-6. The retaining spring 1-9 of the anti-recognition component is clamped on the retaining groove 1-12 of the retaining component mounting column, the retaining component support spring 1-8 is sleeved on the retaining component mounting column 1-6, the retaining component support spring 1-8 is located between the retaining spring 1-9 of the retaining component and the retaining component pressure piece 1-7, one end of the retaining component support spring 1-8 abuts against the retaining component retaining spring 1-9, the other end of the retaining component support spring 1-8 abuts against the retaining component pressure piece 1-7, the retaining component pressure ball 1-10 is installed on the retaining component pressure piece 1-7, and the retaining component pressure ball 1-10 abuts and cooperates with the puncture needle core positioning rod 1-3.

[0039] Among them, the puncture needle core positioning part 1-1 and the stop-recession part mounting column 1-6 are integrally formed, the stop-recession part mounting column 1-6 is a square column, the stop-recession part pressure piece sleeve hole 1-11 is a square hole, and the square cooperation makes the stop-recession part pressure piece 1-7 not rotate but can move forward and backward, and the stop-recession part retaining spring 1-9 functions to fix the stop-recession part supporting spring 1-8 so that the stop-recession part supporting spring 1-8 is pressed on the stop-recession part pressure piece 1-7, and when the pushing force is greater than the stop-recession part supporting spring 1-8, the stop-recession part pressure piece 1-7 can move, and when the stop-recession part pressure piece 1-7 moves backward, the stop-recession part supporting spring 1-8 is compressed, which can avoid the stop-recession part pressure piece 1-7 from getting stuck and provide elastic supporting force, and the stop-recession part pressure piece 1-7 is in the shape of a handle, and the stop-recession part pressure piece 1-7 and the stop-recession part pressure ball 1-10 are integrally formed.

[0040] A driving head puncture needle core plug hole 1-13 is provided at the bottom of the puncture needle core driving head 1-4, and a driving head puncture needle core fixing threaded hole 1-14 is provided at the side of the puncture needle core driving head 1-4. The driving head puncture needle core fixing threaded hole 1-14 is communicated with the driving head puncture needle core plug hole 1-13, and a puncture needle core fixing screw 1-15 is provided on the driving head puncture needle core fixing threaded hole 1-14. The upper end of the puncture needle core 2-1 is inserted into the driving head puncture needle core plug hole 1-13, and the front end of the puncture needle core fixing screw 1-15 abuts against the puncture needle core 2-1, that is, the upper end of the puncture needle core 2-1 is fixed in the driving head puncture needle core plug hole 1-13 by the puncture needle core fixing screw 1-15.

[0041] The piston rod 3 includes a piston rod body 13, a piston rod tooth plate 14 and a piston rod tooth plate fixing screw 15, the piston rod body 13 is provided with a piston rod body groove 16, the piston rod body groove 16 is provided with a piston rod body groove threaded hole 17, the piston rod tooth plate 14 is provided with a piston rod tooth plate screw hole 18, the piston rod tooth plate 14 is installed on the piston rod body groove 16 through the piston rod tooth plate fixing screw 15 through the piston rod tooth plate screw hole 18 into the piston rod body groove threaded hole 17, the piston rod tooth 11 is arranged on the piston rod tooth plate 14, the piston driving rod 5 includes a piston driving rod body 5-1, a piston driving rod tooth plate 19 and a piston driving rod tooth plate fixing screw 20, the piston driving rod body 5-1 is provided with a piston driving rod body groove 21, the piston driving rod body groove 21 is provided with a piston driving rod body groove threaded hole 22, the piston driving rod tooth plate 19 is provided with a piston driving rod tooth plate screw hole 23, The piston driving rod tooth plate 19 is screwed into the piston driving rod body groove threaded hole 22 through the piston driving rod tooth plate fixing screw 20, and is installed on the piston driving rod body groove 21. The piston driving rod tooth 12 is arranged on the piston driving rod tooth plate 19. The gear component 6 includes a gear shaft 24 and a gear 25. The tube body 1 is provided with a gear shaft mounting threaded hole 26, and the gear shaft 24 is provided with a gear shaft thread 27. The gear shaft 24 is installed on the gear shaft mounting threaded hole 26, and the gear shaft mounting threaded hole 26 cooperates with the gear shaft thread 27. The gear 25 is rotatably sleeved on the gear shaft 24. The piston rod teeth 11 and the piston driving rod teeth 12 are both meshed with the gear 25. The piston rod body 13 is provided with a gear left limit strip 28 and a gear right limit strip 29. The left side of the gear 25 abuts and cooperates with the gear left limit strip 28, and the right side of the gear 25 abuts and cooperates with the gear right limit strip 29.

[0042] A rubber piston sleeve plug 30 is provided at the front end of the piston rod 3, and a rubber piston sleeve limiting convex ring 31 is provided on the rubber piston sleeve plug 30. A rubber piston sleeve limiting concave ring 32 is provided on the inner wall of the rubber piston sleeve 4. The rubber piston sleeve limiting convex ring 31 enters the rubber piston sleeve limiting concave ring 32. A rubber piston sleeve sealing convex ring 33 is provided on the outer surface of the rubber piston sleeve 4, and the rubber piston sleeve sealing convex ring 33 is abutted and matched with the inner wall of the piston rod socket 8.

[0043] The piston driving rod 5 is provided with a pressing collar 34 , and the two sides of the tube body 1 are respectively provided with a left hook 35 and a right hook 36 , wherein the pressing collar 34 is fixed to the piston driving rod 5 by screws, and the left hook 35 and the right hook 36 are integrally formed with the tube body 1 .

[0044] As required, detailed embodiments of the present invention are disclosed herein, but it should be understood that the disclosed embodiments are only exemplary of the present invention, and the present invention may be implemented in different and alternative forms. The drawings are not necessarily drawn to scale. Therefore, the specific structural and functional details disclosed herein should not be understood as having a limiting meaning, but only as a representative basis to teach those skilled in the art to adopt and implement the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

Claims

1. A negative pressure suction device for puncture biopsy, characterized in that: The invention comprises a tube body (1), a hollow puncture needle (2), a puncture needle core (2-1), a piston rod (3), a rubber piston sleeve (4), a piston driving rod (5) and a gear component (6). The front end of the tube body (1) is closed and provided with a front opening, the rear end of the tube body (1) is provided with a partition (7), the partition (7) divides the space in the tube body (1) into a piston rod insertion hole (8) and a piston driving rod insertion hole (9), the front end of the tube body (1) is provided with a needle connecting tube (10), the puncture needle (2) is mounted on the needle connecting tube (10), the puncture needle (2), the needle connecting tube (10) and the piston rod insertion hole (8) are connected, the piston driving rod (5) is inserted into the piston driving rod insertion hole (9), the piston rod (3) is inserted into the piston rod insertion hole (8), The rubber piston sleeve (4) is sleeved on the front end of the piston rod (3), and the rubber piston sleeve (4) is in abutment with the inner wall of the piston rod insertion hole (8). The gear component (6) is rotatably mounted on the tube body (1) above the partition (7). The piston rod (3) includes piston rod teeth (11), and the piston driving rod (5) includes piston driving rod teeth (12). The piston rod teeth (11) and the piston driving rod teeth (12) are arranged opposite to each other. The gear component (6) is located on the piston rod teeth. (11) and the piston driving rod teeth (12), the piston rod teeth (11) and the piston driving rod teeth (12) are both meshed with the gear component (6), the piston rod (3) is provided with a piston rod needle core insertion hole (3-1), the rubber piston sleeve (4) is provided with a rubber piston sleeve needle core insertion hole (4-1), the puncture needle core (2-1) is inserted into the piston rod needle core insertion hole (3-1), the rubber piston sleeve needle core insertion hole (4-1), the needle connecting tube (10) and the puncture needle (2), The tube body (1) is provided with a puncture needle core positioning member (1-1) on the side thereof, the puncture needle core positioning member (1-1) is provided with a puncture needle core positioning insertion hole (1-2), the puncture needle core positioning insertion hole (1-2) is provided with a puncture needle core positioning insertion rod (1-3), the puncture needle core positioning insertion rod (1-3) can move up and down in the puncture needle core positioning insertion hole (1-2), the puncture needle core positioning insertion rod (1-3) is provided with a puncture needle core driving head (1-4), the upper end of the puncture needle core (2-1) is fixed on the puncture needle core driving head (1-4), the puncture needle core positioning insertion rod (1-3) is parallel to the puncture needle core (2-1), The puncture needle core positioning piece (1-1) is provided with a puncture needle core positioning insertion rod stopper component (1-5), and the puncture needle core positioning insertion rod stopper component (1-5) cooperates with the puncture needle core positioning insertion rod (1-3).

2. The negative pressure suction device for puncture biopsy according to claim 1, characterized in that: The puncture needle core positioning member (1-1) is provided with a stop-retraction member mounting column (1-6); the puncture needle core positioning rod stop-retraction member (1-5) comprises a stop-retraction member pressing member (1-7), a stop-retraction member supporting spring (1-8), a stop-retraction member retaining spring (1-9) and a stop-retraction member pressing ball (1-10); the stop-retraction member pressing member (1-7) is provided with a stop-retraction member pressing member sleeve hole (1-11); the stop-retraction member mounting column (1-6) is provided with a stop-retraction member mounting column clamping groove (1-12); the stop-retraction member pressing member (1-7) is sleeved on the stop-retraction member mounting column (1-6); The stop-retraction component retaining spring (1-9) is clamped on the stop-retraction component mounting column clamping groove (1-12); the stop-retraction component support spring (1-8) is sleeved on the stop-retraction component mounting column (1-6); the stop-retraction component support spring (1-8) is located between the stop-retraction component retaining spring (1-9) and the stop-retraction component pressing piece (1-7); one end of the stop-retraction component support spring (1-8) abuts against the stop-retraction component retaining spring (1-9); the other end of the stop-retraction component support spring (1-8) abuts against the stop-retraction component pressing piece (1-7); the stop-retraction component pressing ball (1-10) is mounted on the stop-retraction component pressing piece (1-7); and the stop-retraction component pressing ball (1-10) abuts against the puncture needle core positioning plug rod (1-3).

3. The negative pressure suction device for puncture biopsy according to claim 1 or 2, characterized in that: The bottom of the puncture needle core driving head (1-4) is provided with a driving head puncture needle core insertion hole (1-13), and the side of the puncture needle core driving head (1-4) is provided with a driving head puncture needle core fixing threaded hole (1-14), the driving head puncture needle core fixing threaded hole (1-14) is communicated with the driving head puncture needle core insertion hole (1-13), and the driving head puncture needle core fixing threaded hole (1-14) is provided with a puncture needle core fixing screw (1-15), the upper end of the puncture needle core (2-1) is inserted into the driving head puncture needle core insertion hole (1-13), and the front end of the puncture needle core fixing screw (1-15) abuts against the puncture needle core (2-1).

4. The negative pressure suction device for puncture biopsy according to claim 1 or 2, characterized in that: The piston rod (3) comprises a piston rod body (13), a piston rod tooth plate (14) and a piston rod tooth plate fixing screw (15); the piston rod body (13) is provided with a piston rod body groove (16); the piston rod body groove (16) is provided with a piston rod body groove threaded hole (17); the piston rod tooth plate (14) is provided with a piston rod tooth plate screw hole (18); the piston rod tooth plate (14) is installed on the piston rod body groove (16) by the piston rod tooth plate fixing screw (15) passing through the piston rod tooth plate screw hole (18) and screwing into the piston rod body groove threaded hole (17); the piston rod teeth (11) are arranged on the piston rod tooth plate (14); The piston driving rod (5) comprises a piston driving rod body (5-1), a piston driving rod tooth plate (19) and a piston driving rod tooth plate fixing screw (20); the piston driving rod body (5-1) is provided with a piston driving rod body groove (21); the piston driving rod body groove (21) is provided with a piston driving rod body groove threaded hole (22); the piston driving rod tooth plate (19) is provided with a piston driving rod tooth plate screw hole (23); the piston driving rod tooth plate (19) is installed on the piston driving rod body groove (21) by the piston driving rod tooth plate fixing screw (20) passing through the piston driving rod tooth plate screw hole (23) and screwed into the piston driving rod body groove threaded hole (22); the piston driving rod teeth (12) are arranged on the piston driving rod tooth plate (19); The gear component (6) comprises a gear shaft (24) and a gear (25); a gear shaft mounting threaded hole (26) is provided on the tube body (1); a gear shaft thread (27) is provided on the gear shaft (24); the gear shaft (24) is mounted on the gear shaft mounting threaded hole (26); the gear shaft mounting threaded hole (26) and the gear shaft thread (27) are matched; the gear (25) is rotatably sleeved on the gear shaft (24); the piston rod teeth (11) and the piston driving rod teeth (12) are both meshed with the gear (25); a gear left limit strip (28) and a gear right limit strip (29) are provided on the piston rod body (13); the left side of the gear (25) is in abutment with the gear left limit strip (28); and the right side of the gear (25) is in abutment with the gear right limit strip (29).

5. The negative pressure suction device for puncture biopsy according to claim 1 or 2, characterized in that: A rubber piston sleeve plug (30) is provided at the front end of the piston rod (3), a rubber piston sleeve limiting convex ring (31) is provided on the rubber piston sleeve plug (30), a rubber piston sleeve limiting concave ring (32) is provided on the inner wall of the rubber piston sleeve (4), the rubber piston sleeve limiting convex ring (31) enters into the rubber piston sleeve limiting concave ring (32), and a rubber piston sleeve sealing convex ring (33) is provided on the outer surface of the rubber piston sleeve (4), and the rubber piston sleeve sealing convex ring (33) is in abutment with the inner wall of the piston rod insertion hole (8).

6. The negative pressure suction device for puncture biopsy according to claim 5, characterized in that: A pressing collar (34) is provided on the piston driving rod (5), and a left hook (35) and a right hook (36) are respectively provided on two sides of the tube body (1).

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