A cardiac puncture assembly and puncture device

By designing a fixation frame and positioning and angle-fixing module for cardiology puncture components, precise positioning of the puncture position and angle is achieved, solving the problem of inaccurate positioning caused by reliance on physician experience in existing technologies, and improving the safety and effectiveness of treatment.

CN120616623BActive Publication Date: 2026-06-19THE FIRST AFFILIATED HOSPITAL OF ARMY MEDICAL UNIV

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
THE FIRST AFFILIATED HOSPITAL OF ARMY MEDICAL UNIV
Filing Date
2025-07-23
Publication Date
2026-06-19

AI Technical Summary

Technical Problem

Current cardiac puncture techniques rely on the doctor's experience, which can lead to inaccurate localization, affecting treatment outcomes and potentially harming patients.

Method used

A cardiology puncture assembly has been designed, including a fixation frame, a clamping frame, a directional tube, and a positioning and angle-fixing module. Through the combined use of these components, precise positioning of the puncture location and angle can be achieved.

🎯Benefits of technology

It improves the accuracy of punctures, reduces puncture deviations, minimizes harm to patients, and enhances the safety of treatment.

✦ Generated by Eureka AI based on patent content.

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Abstract

This invention belongs to the field of medical device technology, specifically a cardiac puncture component and device. Addressing the limited positioning capability of existing cardiac puncture components, the following solution is proposed: a fixation frame; four symmetrical clamping frames, each externally fixed to the fixation frame and equipped with a fastening bolt; a directional cylinder located within the fixation frame and between the four clamping frames; and a positioning and angle-fixing module comprising a movable component and a movable sleeve. This invention discloses a cardiac puncture component and device that helps physicians accurately position the puncture site and angle during cardiac puncture treatment, effectively reducing the impact of puncture deviation or failure on treatment outcomes, minimizing patient harm, and improving treatment safety.
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Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a cardiology puncture component and puncture device. Background Technology

[0002] Cardiology, or cardiovascular medicine, is a clinical department set up by the internal medicine department of hospitals at all levels to diagnose and treat cardiovascular diseases. Pericardiocentesis is a diagnostic and treatment technique that uses a puncture needle to directly penetrate the pericardial cavity. It can drain the pericardial effusion and reduce the intracardiac pressure. By puncturing and aspirating the pericardial effusion, biochemical tests are performed, smears are used to look for bacteria and pathological cells, and tuberculosis or other bacterial cultures are performed to differentiate and diagnose various types of pericardial diseases.

[0003] In the treatment and diagnosis of heart disease, puncture is a common and crucial step that requires extremely high precision and safety. However, existing cardiology puncture techniques often rely heavily on the doctor's experience and feel, which may lead to inexperienced doctors causing unnecessary harm to patients due to inaccurate positioning during the puncture procedure, thus affecting the patient's treatment outcome. Summary of the Invention

[0004] This invention discloses a cardiology puncture component and puncture device, aiming to solve the technical problem of limited positioning capability of existing cardiology puncture components in the background art.

[0005] The present invention provides a cardiology puncture assembly, including a fixation frame;

[0006] The clamping frames, all four of which are symmetrical, are fixedly connected to the outside of the fixing frame, and each clamping frame is provided with a fastening bolt.

[0007] A directional tube, which is located inside a fixed frame and between four clamping frames;

[0008] The positioning and angle-fixing module includes a movable part two and a movable sleeve. A rotating platform is movably connected to the outside of the movable sleeve. A slide rail is fixedly connected to the upper side of the rotating platform. A slide seat is slidably connected inside the slide rail, and the slide seat is fixedly connected to the opposite side of the outer side of the directional cylinder. The positioning and angle-fixing module is used to accurately position the puncture device when performing cardiac puncture on a patient.

[0009] In a preferred embodiment, the fixing frame has a slit, within which two symmetrical sliding rods are fixedly connected. Each sliding rod is slidably connected to a movable component, and each movable component is equipped with a fastening bolt. A common upper crossbar is fixedly connected to the opposite side of the two movable components, and a slot is formed on the upper side of the upper crossbar, within which a rack is fixedly connected. The outer side of the upper crossbar is slidably connected to the inner wall of the movable component. A boss is fixedly connected to the upper side of the movable component, and a locking component is movably connected to the boss. An elastic spring is fixedly connected to the outer side of the boss, with the end of the elastic spring away from the boss fixedly connected to the outer side of the locking component. A rectangular opening is formed on the upper side of the movable component, through which one end of the locking component passes and engages with the rack. Symmetrical threaded rods one and two are provided below the movable component, and a common adjusting frame is provided on the outer side of both threaded rods. The upper side of the threaded rod one is fixedly connected to the bottom of the movable component two, and the bottom of the threaded rod two is movably connected. The system is connected to a connecting seat, with a telescopic rod movably connected to the bottom of the connecting seat. A sleeve is slidably connected to the outside of the telescopic rod, and the end of the sleeve away from the telescopic rod is fixedly connected to the outside of the rotating platform. The fixed frame has two symmetrical rectangular holes on its exterior. Two symmetrical vertical rods are fixedly connected to the inner walls of each rectangular hole. Movable seats are slidably connected to the outside of each vertical rod, and each movable seat has a fastening bolt three. A sliding rod two is fixedly connected to the opposite side of the two movable seats two on the same side. Movable seats two are slidably connected to the outside of each sliding rod two, and both movable seats two have fastening bolts four. A lower horizontal rod is fixedly connected to the opposite side of the two movable seats two. The outside of the lower horizontal rod is slidably connected to the inner wall of the movable sleeve. Two symmetrical narrow grooves are opened on the slide rail, and sliders are slidably connected to each narrow groove. The sliders are fixedly connected to the opposite side of the slide block. A spring one is connected to the outside of the slide block via a tensioning rod, and the end of the spring one away from the slide block is fixedly connected to the inner wall of the slide rail.

[0010] In a preferred embodiment, a cardiology puncture device includes a cardiology puncture assembly as described above, and a syringe. A puncture needle is inserted into one end of the syringe. The outside of the syringe is inserted into the inner wall of a directional cylinder. A mounting base is fixedly connected to the outside of a rotating platform. The mounting base has a circular hole. An adjusting screw is rotatably connected to the circular hole via a bearing. A toothed ring is fixedly connected to the outside of the adjusting screw. The toothed ring is movably connected to the side opposite to the mounting base. A locking ring is provided on the outside of the toothed ring. A rack is fixedly connected to the inner wall of the locking ring, and the rack engages with the toothed ring. A guide buckle is slidably connected to the outside of the locking ring. The guide buckle is fixedly connected to the side opposite to the mounting base. A spring is fixedly connected to the side of the guide buckle away from the toothed ring. The end of the spring away from the guide buckle is fixedly connected to the inner wall of the locking ring. A transmission ring is rotatably connected to the outside of the adjusting screw via an external thread. The outside of the transmission ring is fixedly connected to the outside of a slider near the transmission ring. The transmission ring is located on the side of the mounting base away from the locking ring.

[0011] As can be seen from the above, the cardiology puncture component and cardiology puncture device provided by the present invention can help doctors accurately position the puncture location and angle when performing cardiology puncture treatment on patients, thereby effectively reducing the impact of puncture deviation or failure on the treatment effect, reducing harm to patients, and improving the safety of treatment. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of a cardiology puncture assembly proposed in this invention;

[0013] Figure 2 This is a cross-sectional structural diagram of a cardiology puncture assembly proposed in this invention;

[0014] Figure 3 This is a schematic diagram of the movable component 2 and the adjustment frame structure of a cardiology puncture assembly proposed in this invention;

[0015] Figure 4 This is a schematic diagram of the lower crossbar structure of a cardiology puncture assembly proposed in this invention;

[0016] Figure 5 This is a schematic diagram of the rotating platform structure of a cardiology puncture assembly proposed in this invention;

[0017] Figure 6 This is a schematic diagram of the syringe and puncture needle structure of a cardiology puncture device proposed in this invention;

[0018] Figure 7 This is a schematic diagram of the mounting base structure of a cardiology puncture device proposed in this invention.

[0019] In the diagram: 1. Fixed frame; 2. Clamping frame; 3. Fastening bolt one; 4. Orienting cylinder; 5. Positioning and angle fixing module; 501. Slide rod one; 502. Movable part one; 503. Fastening bolt two; 504. Upper crossbar; 505. Movable part two; 506. Rack one; 507. Locking element; 508. Elastic spring; 509. Adjusting frame; 510. Threaded rod one; 511. Threaded rod two; 512. Connecting seat; 513. Vertical rod; 514. Movable seat one; 515. Fastening bolt 516. Bolt 3; 517. Slide rod 2; 518. Movable seat 2; 519. Fastening bolt 4; 520. Lower crossbar; 521. Movable sleeve; 522. Rotating table; 523. Slide rail; 524. Slide block; 525. Spring 1; 526. Slider; 527. Telescopic rod; 528. Sleeve; 6. Syringe; 7. Puncture needle; 8. Adjusting screw; 9. Mounting seat; 10. Locking ring; 11. Gear ring; 12. Rack 2; 13. Guide buckle; 14. Spring 2; 15. Transmission ring. Detailed Implementation

[0020] 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.

[0021] The cardiology puncture component and puncture device disclosed in this invention are mainly applied to scenarios where the positioning capability of existing cardiology puncture components is limited.

[0022] Reference Figures 1-7 A cardiology puncture assembly, including a fixation frame 1;

[0023] Clamping frame 2, four symmetrical clamping frames 2 are all connected to the outside of the fixing frame 1 by bolts, and each clamping frame 2 is provided with a fastening bolt 3;

[0024] The directional cylinder 4 is located inside the fixing frame 1 and between the four clamping frames 2;

[0025] The positioning and angle-fixing module 5 includes a movable part 505 and a movable sleeve 520. The movable sleeve 520 is rotatably connected to a rotating platform 521 via a bearing. A slide rail 522 is bolted to the upper side of the rotating platform 521. A slide seat 523 is slidably connected inside the slide rail 522. The slide seat 523 is bolted to the opposite side of the outer side of the directional cylinder 4. The positioning and angle-fixing module 5 is used to accurately position the puncture device when performing cardiac puncture on a patient.

[0026] Reference Figure 3 , Figure 4 and Figure 5In a preferred embodiment, the fixing frame 1 has a slit, and two symmetrical sliding rods 501 are bolted into the slit. Each sliding rod 501 is slidably connected to a movable part 502, and each movable part 502 is equipped with a fastening bolt 503. The opposite sides of the two movable parts 502 are bolted to the same upper crossbar 504, and the upper side of the upper crossbar 504 has a slot, within which a rack 506 is bolted. The outer side of the upper crossbar 504 is slidably connected to the inner wall of the movable part 505. A boss is bolted to the upper side of the movable part 505, and a bearing is rotatably connected to the boss. A locking element 507 is attached. An elastic spring 508 is bolted to the outside of the boss. The end of the elastic spring 508 away from the boss is bolted to the outside of the locking element 507. A rectangular opening is provided on the upper side of the movable part 505. One end of the locking element 507 passes through the rectangular opening and engages with the rack 506. Symmetrical threaded rods 510 and 511 are provided below the movable part 505. The same adjusting frame 509 is provided on the outside of the threaded rods 510 and 511. The upper side of the threaded rod 510 is bolted to the bottom of the movable part 505, and the bottom of the threaded rod 511 is rotatably connected via a bearing. A connecting seat 512 is provided, and a telescopic rod 526 is rotatably connected to the bottom of the connecting seat 512 via a bearing. A sleeve 527 is slidably connected to the outside of the telescopic rod 526. The end of the sleeve 527 away from the telescopic rod 526 is bolted to the outside of the rotating platform 521. Two symmetrical rectangular holes are opened on the outside of the fixed frame 1. Two symmetrical vertical rods 513 are bolted to the inner walls of the rectangular holes. Movable seats 514 are slidably connected to the outside of the vertical rods 513. Each movable seat 514 is provided with a fastening bolt 515. The two movable seats 514 on the same side are bolted to the same sliding rod 516 on opposite sides. The two rods 516 are slidably connected to the outer side of the movable seats 517, and each movable seat 517 is provided with a fastening bolt 518. The two movable seats 517 are connected to the same lower crossbar 519 by bolts on the opposite side. The outer side of the lower crossbar 519 is slidably connected to the inner wall of the movable sleeve 520. The slide rail 522 has two symmetrical narrow slots, and each narrow slot is slidably connected to a slider 525. The slider 525 is connected to the opposite side of the slide block 523 by bolts. The slide block 523 is connected to a spring 524 by a tensioning rod on the outside. The end of the spring 524 away from the slide block 523 is connected to the inner wall of the slide rail 522 by bolts.

[0027] Specifically, before performing the puncture on the patient, the fixation frame 1 is set up on the patient's bed. The clamping frame 2 and fastening bolt 3 are used to fix the fixation frame 1 to the bed, so that the fixation frame 1 is positioned above the patient's chest cavity. The fastening bolt 3 515 is loosened, and the adjusting frame 509 is rotated, so that the adjusting frame 509 moves the threaded rod 2 511 closer to the threaded rod 1 510, and the sliding rod 2 516 is raised, so that the rotating platform 521 is moved to a position above and relatively close to the patient's chest cavity. The fastening bolt 3 515 is tightened, and the fastening bolt 4 518 and fastening bolt 2 503 are loosened, so that the rotating platform 521 can be moved laterally to a position closer to the patient's heart puncture site. At the puncture point, tighten the fourth fastening bolt 518 and the second fastening bolt 503, rotate the adjusting frame 509 again and overcome the elastic force of the elastic spring 508 to press the locking part 507, so that the locking part 507 is released from the engagement with the rack 506, and the movable part 505 slides on the upper crossbar 504, so that the threaded rod 510, the adjusting frame 509 and the threaded rod 511 form a whole to push and pull the rotating table 521. With the help of the sleeve 527 extending or shortening on the telescopic rod 526, the rotating table 521 can rotate on the movable sleeve 520, so that the directional cylinder 4 can be aligned with the puncture point at a certain angle.

[0028] In specific application scenarios, the positioning and angle determination module 5 is mainly used in the positioning and angle determination process. That is, the positioning and angle determination module 5 uses the movable sleeve 520, the rotating table 521 and the directional cylinder 4 to help doctors accurately locate the puncture position and angle when performing cardiac puncture treatment on patients. This effectively reduces the impact of puncture deviation or failure on the treatment effect, reduces harm to patients, and improves the safety of treatment.

[0029] Reference Figure 6 and Figure 7In a preferred embodiment, a cardiology puncture device includes a cardiology puncture assembly as described above, and further includes a syringe 6. A puncture needle 7 is inserted into one end of the syringe 6. The outside of the syringe 6 is inserted into the inner wall of the directional cylinder 4. A mounting base 9 is bolted to the outside of the rotating platform 521. The mounting base 9 has a circular hole, and an adjusting screw 8 is rotatably connected to the circular hole via a bearing. A toothed ring 11 is bolted to the outside of the adjusting screw 8. The side of the toothed ring 11 opposite to the mounting base 9 is rotatably connected via a bearing. A locking ring 10 is provided on the outside of the toothed ring 11, and the inner wall of the locking ring 10 is bolted to... There is a rack 12, which is engaged with the gear ring 11; the locking ring 10 is slidably connected to the outside of a guide buckle 13, which is bolted to the side opposite to the mounting base 9, and the side of the guide buckle 13 away from the gear ring 11 is bolted to a spring 14, the end of the spring 14 away from the guide buckle 13 is bolted to the inner wall of the locking ring 10; the adjusting screw 8 is rotatably connected to a transmission ring 15 by an external thread, and the outside of the transmission ring 15 is bolted to the outside of the slider 525 near the side of the transmission ring 15, and the transmission ring 15 is located on the side of the mounting base 9 away from the locking ring 10.

[0030] Specifically, after inserting the syringe 6 into the directional cylinder 4 and fixing it, the puncture needle 7 is installed on the syringe 6. Overcoming the elastic force of the second spring 14, the locking ring 10 is pushed upward. Under the guidance of the guide buckle 13, the locking ring 10 moves upward, thereby releasing the rack 12 from locking the toothed ring 11. The adjusting screw 8 is rotated, and the rotating adjusting screw 8 pushes the transmission ring 15 connected to the slider 525 to move, thereby causing the slide 523 to drive the syringe 6 in the directional cylinder 4 to move towards the patient's puncture position. Finally, as the adjusting screw 8 continues to rotate, the cardiology puncture of the patient is completed. After the puncture is completed, the locking ring 10 is released. Under the elastic force of the second spring 14, the locking ring 10 returns to its original position, causing the rack 12 to lock the toothed ring 11, and the adjusting screw 8 stops rotating.

[0031] In specific application scenarios, the device utilizes the adjusting screw 8, locking ring 10, rack 2 12, and gear ring 11 to ensure that the puncture needle 7 can be stably inserted into the patient's chest cavity during puncture operations. Furthermore, once the puncture is in place, it ensures that the position of the puncture needle 7 will not shift with the movements of the doctor or the patient, thus preventing the needle tip of the puncture needle 7 from being pulled out or shifting inside the patient's body, which could lead to puncture failure or damage to internal organs, thereby reducing risks.

[0032] Working principle: Before puncture, the fixation frame 1 is placed on the patient's bed. The clamping frame 2 and fastening bolt 3 are used to fix the fixation frame 1 to the bed, so that the fixation frame 1 is above the patient's chest cavity. The fastening bolt 3 515 is loosened, and the adjusting frame 509 is rotated, so that the adjusting frame 509 moves the threaded rod 2 511 closer to the threaded rod 1 510, and the sliding rod 2 516 is raised, so that the rotating table 521 is moved to a position above and close to the patient's chest cavity. The fastening bolt 3 515 is then tightened. Loosen the fourth fastening bolt 518 and the second fastening bolt 503 to allow the rotating table 521 to move laterally closer to the patient's cardiac puncture site. Tighten the fourth fastening bolt 518 and the second fastening bolt 503, rotate the adjusting frame 509 again, and overcome the elastic force of the elastic spring 508 to press the locking member 507, causing the locking member 507 to disengage from the rack 506, allowing the movable member 505 to slide on the upper crossbar 504, thereby allowing the threaded rod 510, the adjusting frame 509, and the threaded rod 510 to move laterally. The entire assembly 1 pushes and pulls the rotating platform 521. With the help of the sleeve 527 extending or shortening on the telescopic rod 526, the rotating platform 521 can rotate on the movable sleeve 520, allowing the directional cylinder 4 to be aligned with the puncture point at a certain angle. After the syringe 6 is inserted into the directional cylinder 4 and fixed, the puncture needle 7 is installed on the syringe 6. Overcoming the elastic force of spring 14, the locking ring 10 is pushed upwards. Guided by the guide buckle 13, the locking ring 10 moves upwards, thereby releasing rack 12. In addition to locking the toothed ring 11, rotating the adjusting screw 8 will push the transmission ring 15 connected to the slider 525 to move, thereby causing the slide 523 to drive the syringe 6 in the directional cylinder 4 to move towards the patient's puncture position. Finally, as the adjusting screw 8 continues to rotate, the cardiology puncture of the patient is completed. After the puncture is completed, the locking ring 10 is released. Under the elastic force of the second spring 14, the locking ring 10 returns to its original position, causing the second rack 12 to lock the toothed ring 11, and the adjusting screw 8 no longer rotates.

[0033] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. An intracardiac puncture assembly, comprising: Includes a mounting bracket (1); Clamping frame (2), the four symmetrical clamping frames (2) are all fixedly connected to the outside of the fixing frame (1), and each clamping frame (2) is provided with a fastening bolt (3); The directional tube (4) is located inside the fixed frame (1) and between the four clamping frames (2); The positioning and angle-fixing module (5) includes a movable part two (505) and a movable sleeve (520). The movable sleeve (520) is movably connected to a rotating platform (521). A slide rail (522) is fixedly connected to the upper side of the rotating platform (521). A slide seat (523) is slidably connected inside the slide rail (522). The slide seat (523) is fixedly connected to the opposite side of the outer side of the directional cylinder (4). The positioning and angle-fixing module (5) is used to accurately position the puncture device when performing cardiac puncture on a patient. The fixed frame (1) has a cut, and two symmetrical sliding rods (501) are fixedly connected in the cut. The two sliding rods (501) are slidably connected to the outside of each sliding rod (502). Each sliding rod (502) is provided with a fastening bolt (503). The same upper crossbar (504) is fixedly connected to the opposite side of the two sliding rods (502). The upper side of the upper crossbar (504) has a slot, and a rack (506) is fixedly connected in the slot. The outside of the upper crossbar (504) is slidably connected to the inner wall of the sliding rod (505). The upper side of the movable part 2 (505) is fixedly connected to a boss, and a locking member (507) is movably connected to the boss. An elastic spring (508) is fixedly connected to the outside of the boss. The end of the elastic spring (508) away from the boss is fixedly connected to the outside of the locking member (507). A rectangular opening is provided on the upper side of the movable part 2 (505). One end of the locking member (507) passes through the rectangular opening and engages with the rack 1 (506). Symmetrical threaded rod 1 (510) and threaded rod 2 (511) are provided below the movable part 2 (505). The same adjustment frame (509) is provided on the outside of threaded rod 1 (510) and threaded rod 2 (511). The upper side of the threaded rod (510) is fixedly connected to the bottom of the movable part (505). The bottom of the threaded rod (511) is movably connected to the connecting seat (512). The bottom of the connecting seat (512) is movably connected to the telescopic rod (526). The telescopic rod (526) is slidably connected to the outside of the sleeve (527). The end of the sleeve (527) away from the telescopic rod (526) is fixedly connected to the outside of the rotating table (521).

2. The intracardiac assembly of claim 1, wherein, The fixed frame (1) has two symmetrical rectangular holes on its exterior. The inner walls of the rectangular holes are fixedly connected to two symmetrical vertical rods (513). The exterior of each vertical rod (513) is slidably connected to a movable seat (514). Each movable seat (514) is provided with a fastening bolt (515). The two movable seats (514) on the same side are fixedly connected to the same sliding rod (516) on opposite sides. The exterior of each sliding rod (516) is slidably connected to a movable seat (517), and each movable seat (517) is provided with a fastening bolt (518).

3. A cardiology puncture assembly according to claim 2, characterized in that, The two movable seats (517) are fixedly connected to the same lower crossbar (519) on opposite sides. The outer side of the lower crossbar (519) is slidably connected to the inner wall of the movable sleeve (520). Two symmetrical narrow slots are opened on the slide rail (522). A slider (525) is slidably connected in each narrow slot. The slider (525) is fixedly connected to the opposite side of the slide seat (523). A spring (524) is connected to the outside of the slide seat (523). The end of the spring (524) away from the slide seat (523) is fixedly connected to the inner wall of the slide rail (522).

4. A cardiology puncture device, comprising a cardiology puncture assembly as described in any one of claims 1-3, and further comprising a syringe (6), characterized in that, One end of the syringe (6) is connected to a puncture needle (7), the outside of the syringe (6) is connected to the inner wall of the directional cylinder (4), and the outside of the rotating table (521) is fixedly connected to a mounting base (9). A round hole is provided on the mounting base (9), and an adjusting screw (8) is rotatably connected to the round hole through a bearing. A toothed ring (11) is fixedly connected to the outside of the adjusting screw (8).

5. The intracardiac puncture device of claim 4, wherein, The toothed ring (11) and the mounting base (9) The opposite side is movably connected. A locking ring (10) is provided on the outside of the toothed ring (11). A rack (12) is fixedly connected to the inner wall of the locking ring (10), and the rack (12) is engaged with the toothed ring (11).

6. The intracardiac puncture device of claim 5, wherein, The locking ring (10) is slidably connected to a guide buckle (13). The guide buckle (13) is fixedly connected to the side opposite to the mounting base (9). A second spring (14) is fixedly connected to the side of the guide buckle (13) away from the toothed ring (11). The end of the second spring (14) away from the guide buckle (13) is fixedly connected to the inner wall of the locking ring (10).

7. The intracardiac puncture device of claim 6, wherein, The external of the adjusting screw (8) is rotatably connected to the transmission ring (15) by an external thread. The external of the transmission ring (15) is fixedly connected to the external of the slider (525) near the side of the transmission ring (15), and the transmission ring (15) is located on the side of the mounting base (9) away from the locking ring (10).

Citation Information

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