A fully automatic biopsy needle with a safety structure

Abstract

The present invention relates to a fully automatic biopsy needle with a safety structure, comprising a needle holder assembly, a needle tube holder assembly, a cover body assembly, a sleeve assembly, a firing rod, a firing button, and a safety rod. The sleeve assembly is placed in the cover body assembly, the firing rod is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing rod slides axially along the sleeve assembly, the firing button extends into the cover body assembly and cooperates with the front end of the firing rod in transmission, a safety rod slot is arranged at the rear end of the firing rod, a safety block is arranged at the rear end of the safety rod slot, a safety slot matched with the safety rod is arranged at the rear end of the cover body assembly so that the safety rod slides radially along the cover body assembly, a travel groove is arranged in the middle of the safety rod, when locked, the safety block abuts against the safety rod, when unlocked, the safety rod is pushed so that the travel groove cooperates with the safety block, and the firing rod moves along the travel groove to realize firing.

Description

Technical Field

[0001] The invention relates to the technical field of medical detection instruments and equipment, in particular to a full-automatic biopsy needle with a safety structure. Background Art

[0002] A biopsy needle is a medical device that is suitable for use in multiple organs such as the kidneys, liver, lungs, breasts, thyroid glands, prostate glands, pancreas, testicles, uterus, ovaries, and body surface. It can be used for sampling living tissue and aspirating cells from vertebral tumors and tumors of unknown types.

[0003] Clinically, when examining a cancer patient, in order to determine the nature of the tumor, it is necessary to use a biopsy needle to take some living tissue from the diseased area. In the past, the traditional method of human tissue biopsy was surgical incision, in which the tissue was removed for biopsy. This method has the disadvantages of large trauma, high cost, and great pain for the patient. In recent years, tissue biopsy mainly uses a biopsy needle, which is composed of a needle body, a needle seat, and a needle core. The needle core is inserted into the needle body from the needle seat. The end of the needle core has a needle groove, and the end of the needle body is made into a bevel, forming a blade-like incision. When this biopsy needle is used to remove tissue, the trauma surface is small and the biopsy success rate is high. In the prior art, the patent document with the authorization announcement number CN209048193U records a percutaneous puncture biopsy needle, including a needle tube and a needle core, and also includes a handle operating end. The handle operating end includes an outer shell, an inner sleeve, an anti-misfire button, a rear firing button, a left button, and a right button. The anti-misfire button acts on the needle core frame (see the attached manual). Figure 5 ), the anti-error button of the above structure is complex in structure and inconvenient to operate. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a fully automatic biopsy needle with a safety structure which is simple in structure and easy to operate.

[0005] In order to solve the above technical problems, the present invention provides a fully automatic biopsy needle with a safety structure, including a needle holder assembly, a needle tube holder assembly, and a cover body assembly, a sleeve assembly, a firing rod, a firing button, and a safety rod. The sleeve assembly is placed in the cover body assembly, and the firing rod is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing rod can slide axially along the sleeve assembly. The firing button extends into the cover body assembly and cooperates with the front end of the firing rod for transmission. A safety rod slot is arranged at the tail end of the firing rod, and a safety block is arranged at the rear end of the safety rod slot. A safety slot adapted to the safety rod is arranged at the tail end of the cover body assembly so that the safety rod can slide radially along the cover body assembly. A travel groove is arranged in the middle part of the safety rod. When locked, the safety block abuts against the safety rod. When unlocked, the safety rod is pushed so that the travel groove cooperates with the safety block, and the firing rod moves along the travel groove to realize firing.

[0006] Furthermore, slides are arranged on both sides of the travel groove, and the slides are lower than the two ends of the safety rod and higher than the travel groove, so that the safety block abuts against the slide when the firing rod is locked, and the travel groove is placed at the safety block after the safety rod moves.

[0007] Furthermore, limit stop bars are respectively arranged on the inner sides of both ends of the safety rod, and when assembled, the limit stop bars are placed between the safety slots on both sides of the cover assembly, so that when the safety rod moves, the limit stop bars are blocked and limited by the inner wall of the cover assembly to prevent the safety rod from leaving the safety slot.

[0008] Furthermore, the sleeve assembly includes a plug-in positioning left sleeve and a positioning right sleeve, and the outer wall of the positioning left sleeve is symmetrically provided with connecting rod limit blocks, and a connecting rod slide groove is formed between the two connecting rod limit blocks. The front part of the firing connecting rod is slidably matched with the connecting rod slide groove, and the firing connecting rod is guided by the connecting rod limit blocks.

[0009] Furthermore, the positioning left sleeve and the positioning right sleeve both include a semicircular first sleeve portion and a second sleeve portion. After the positioning left sleeve and the positioning right sleeve are plugged into each other, the first sleeve portion forms a first cylinder and the second sleeve portion forms a second cylinder. The diameter of the first cylinder is greater than that of the second cylinder.

[0010] Furthermore, the firing link includes a connecting rod body, a firing button slot is provided at the front end of the connecting rod body, a button clamping column is provided on the firing button, and a firing window is provided on the cover body assembly. The button clamping column passes through the firing window and is inserted into the firing button slot, so that the firing link is driven to move when the firing button outside the cover body assembly moves.

[0011] Furthermore, the tail end of the connecting rod body is L-shaped, a sliding bracket is provided at the tail end of the connecting rod body, and a connecting rod slot suitable for the firing connecting rod to pass through is provided on the first sleeve part, so that the connecting rod body passes through the connecting rod slot and is placed outside the sleeve assembly.

[0012] Furthermore, a needle holder block and a connecting rod block are arranged in the first sleeve part, and a firing chamber is formed between the needle holder block and the connecting rod block after the left positioning sleeve and the right positioning sleeve are plugged in and matched, and the sliding bracket is placed in the firing chamber.

[0013] Furthermore, limiting brackets are arranged on both sides of the front end of the bumper slot, and the limiting brackets are placed between the bumper slot and the sliding bracket. During assembly, the limiting brackets are placed outside the connecting rod stopper.

[0014] Furthermore, the cover body assembly includes a semi-cylindrical upper cover and a lower cover that are plug-fitted together. The upper cover and the lower cover are provided with a sleeve limiting groove. The outer wall of the first sleeve part is provided with a limiting column that is plug-fitted with the sleeve limiting groove. During assembly, the limiting column is placed in the sleeve limiting groove for circumferential positioning of the sleeve assembly.

[0015] The technical effects of the invention are as follows: (1) Compared with the prior art, the biopsy needle of the present invention realizes the safety locking function by arranging a safety rod radially at the tail end of the firing rod so that the firing rod cannot move when the safety rod is locked; the safety rod directly limits the stroke of the firing rod, so the needle holder and the needle tube holder are limited at the same time, which is safer; (2) slides are arranged on both sides of the stroke groove to facilitate the movement and unlocking of the safety rod; (3) the setting of the limit stop bar facilitates the limiting of the safety rod to prevent the safety rod from being separated from the safety slot; (4) the connecting rod sliding groove is formed by the two connecting rod limit blocks, which is convenient for guiding the firing rod when it moves. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0017] Figure 1 It is a three-dimensional structural schematic diagram of a fully automatic biopsy needle with a safety structure;

[0018] Figure 2 It is a schematic diagram of the exploded structure after the cover assembly and the sleeve assembly are separated;

[0019] Figure 3 It is a schematic diagram of the three-dimensional structure of the upper cover;

[0020] Figure 4 1 is a three-dimensional structural schematic diagram of the sleeve assembly;

[0021] Figure 5 It is a schematic diagram of the three-dimensional structure of the positioning right sleeve;

[0022] Figure 6 It is a three-dimensional structural schematic diagram of the positioning left sleeve;

[0023] Figure 7 It is a three-dimensional structural schematic diagram of the firing rod;

[0024] Figure 8 It is a three-dimensional structural schematic diagram of the bumper;

[0025] Fig. 9 It is a schematic diagram of the three-dimensional structure after the firing link, the safety lever and the firing button are assembled;

[0026] Fig.10 is a schematic diagram of the exploded structure of the biopsy needle assembly;

[0027] Fig.11 is a schematic diagram of the exploded structure of a biopsy needle assembly;

[0028] In the figure:

[0029] Upper cover 10, lower cover 11, push rod window 12, firing window 13, rectangular slot 14, safety slot 15, sleeve limit slot 16,

[0030] Positioning left sleeve 20, positioning right sleeve 21, needle holder slide 22, needle tube holder slide 23, connecting rod limit block 24, needle holder block 25, firing chamber 26, needle tube holder block 27, connecting rod block 28, first sleeve part 210, limit column 211, connecting rod slot 212, second sleeve part 213, needle holder moving chamber 214, needle tube holder moving chamber 215, needle holder slot 216, needle tube holder slot 217,

[0031] Firing rod 30, firing button 31, sliding bracket 32, limiting bracket 33, rear cover 34, firing button slot 35, safety rod slot 36, safety block 37, connecting rod extrusion slot 38, connecting rod body 39, button clamp column 311,

[0032] Safety rod 40, travel groove 41, limit stop bar 42, slide 43,

[0033] Needle holder 50, needle holder push rod 51, needle holder extrusion groove 52, biopsy needle 53, needle holder slot 54, first spring 55, needle holder buckle 56, needle holder plug post 57,

[0034] The needle tube rack 60 , the needle tube rack push rod 61 , the shielding cover 62 , the needle tube 63 , the needle tube rack slot 64 , the second spring 65 , the needle tube rack buckle 66 , and the needle tube rack plug column 67 . DETAILED DESCRIPTION

[0035] Example 1

[0036] like Figures 1 to 11 As shown, the fully automatic biopsy needle with a safety structure of this embodiment includes a cover body assembly, a sleeve assembly, a firing link 30, a firing button 31, a safety rod 40, and also includes a needle holder assembly and a needle tube holder assembly; the cover body assembly includes a semi-cylindrical and plug-matched upper cover 10 and lower cover 11, and rectangular grooves 14 are symmetrically arranged at the front of the upper cover 10 and the lower cover 11, and second rectangular grooves are symmetrically arranged at the rear of the upper cover 10 and the lower cover 11, so that after the upper cover 10 and the lower cover 11 are plugged together, the two rectangular grooves 14 form a firing window 13, and the two second rectangular grooves form a safety slot 15.

[0037] The sleeve assembly is placed in the cover body assembly, and the sleeve assembly includes a plug-in positioning left sleeve 20 and a right sleeve 21. The positioning left sleeve 20 and the positioning right sleeve 21 both include a semicircular first sleeve portion 210 and a second sleeve portion 213. After the positioning left sleeve 20 and the positioning right sleeve 21 are plug-in-fitted, the first sleeve portion 210 forms a first cylinder, and the second sleeve portion 213 forms a second cylinder. The diameter of the first cylinder is greater than that of the second cylinder.

[0038] A sleeve limiting groove 16 is also provided in the upper cover 10 and the lower cover 11. A limiting column 211 which is plugged into and cooperates with the sleeve limiting groove 16 is provided on the outer wall of the first sleeve portion 210. During assembly, the limiting column 211 is placed in the sleeve limiting groove 16 for circumferential positioning of the sleeve assembly.

[0039] The firing link 30 is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing link 30 can slide axially along the sleeve assembly. The firing link 30 includes a connecting rod body 39. A firing button slot 35 is arranged at the front end of the connecting rod body 39. A button clamping column 311 is arranged on the firing button 31. The button clamping column 311 passes through the firing window 13 and is inserted into the firing button slot 35, so that when the firing button 31 outside the cover body assembly moves, the firing link 30 is driven to move.

[0040] The tail end of the connecting rod body 39 is L-shaped, and a sliding bracket 32 ​​is set at the tail end of the connecting rod body 39. A connecting rod slot 212 suitable for the connecting rod body 39 of the firing connecting rod 30 to pass through is set on the first sleeve part 210, so that the connecting rod body 39 passes through the connecting rod slot 212 and is placed outside the second sleeve part 213.

[0041] A needle holder block 25 and a connecting rod block 28 are disposed in the first sleeve portion 210. After the left sleeve 20 and the right sleeve 21 are positioned and plugged in, a firing chamber 26 is formed between the needle holder block 25 and the connecting rod block 28. The sliding bracket 32 ​​is placed in the firing chamber 26, and the connecting rod slot 212 is placed on the side wall of the firing chamber 26.

[0042] The outer wall of the left positioning sleeve 20 is symmetrically provided with connecting rod limit blocks 24 , and a connecting rod sliding groove is formed between the two connecting rod limit blocks 24 . The front part of the firing connecting rod 30 is slidably matched with the connecting rod sliding groove, and the firing connecting rod 30 is guided by the connecting rod limit blocks 24 .

[0043] A safety rod slot 36 is provided at the tail end of the firing link 30, and a safety block 37 is provided at the rear end of the safety rod slot 36. The safety rod 40 is adapted to the safety slot 15 at the tail end of the cover body assembly so that the safety rod 40 can slide radially along the cover body assembly. A travel groove 41 is provided in the middle of the safety rod 40. When locked, the safety block 37 abuts against the safety rod 40. When unlocked, the safety rod 40 is pushed so that the travel groove 41 cooperates with the safety block 37, and the firing link 30 moves along the travel groove 41 to realize firing.

[0044] Limiting brackets 33 are arranged on both sides of the front end of the bumper slot 36 , and the limiting brackets 33 are placed between the bumper slot 36 and the sliding bracket 32 ​​. When assembled, the limiting brackets 33 are placed outside the connecting rod stopper 28 .

[0045] A rear cover 34 is provided at the rear end of the safety stopper 37 for closing the rear end of the cover assembly.

[0046] Slides 43 are set on both sides of the travel groove 41. The slides 43 are lower than the two ends of the safety rod 40 and higher than the travel groove 41, which is convenient for the safety rod 40 to slide so that the safety block 37 abuts against the slide 43 when the firing link 30 is locked. After the safety rod 40 moves, the travel groove 41 is placed at the safety block 37.

[0047] Limiting bars 42 are respectively arranged on the inner sides of both ends of the safety rod 40. When assembled, the limiting bars 42 are placed between the safety slots 15 on both sides of the cover assembly so that when the safety rod 40 moves, the limiting bars 42 are blocked and limited by the inner wall of the cover assembly to prevent the safety rod 40 from escaping from the safety slots 15.

[0048] The needle holder assembly includes a needle holder 50, a needle holder push rod 51, a biopsy needle 53, and a first spring 55. The needle tube holder assembly includes a needle tube holder 60, a needle tube holder push rod 61, a shielding cover 62, a needle tube 63, and a second spring 65. The needle tube holder 60 and the needle holder 50 are slidably arranged in a sleeve assembly composed of a positioning left sleeve 20 and a positioning right sleeve 21, and a needle holder slide groove 22 and a needle tube holder slide groove 23 are arranged on the side wall of the sleeve assembly. A needle tube holder stopper 27 is arranged in the second sleeve portion 213, and the needle tube holder stopper 27 isolates the second sleeve portion 213 into a needle holder moving bin 214 and a needle tube holder moving bin 215. The needle holder slide groove 22 is arranged on one side of the needle holder moving bin 214, and the needle tube holder slide groove 23 is arranged on one side of the needle tube holder moving bin 215.

[0049] A push rod window 12 is provided on one side of the upper cover 10, a shielding cover 62 is fixedly provided at the front end of the sleeve assembly, the tail end of the needle tube 63 is fixedly connected to the front end of the needle tube stand 60, the front end of the needle tube 60 extends out of the shielding cover 62 and is slidably matched with the shielding cover 62, a needle tube stand buckle 66 is provided at the tail end of the needle tube stand 60, a needle tube stand plug column 67 is protruded from one side of the needle tube stand 60, a needle tube stand push rod 61 is slidably provided in the push rod window 12, and a needle tube stand slot 64 adapted to the needle tube stand plug column 67 is provided on the needle tube stand push rod 61 , so that the needle tube rack plug 67 passes through the needle tube rack slide groove 23 and is plugged into the needle tube rack slot 64. When the needle tube rack push rod 61 moves, it drives the needle tube rack 60 and the needle tube 63 to move. A needle tube rack clamping groove 217 matched with the needle tube rack buckle 66 is provided in the middle of the needle tube rack block 27. The second spring 65 is placed between the needle tube rack block 27 and the needle tube rack 60, so that the needle tube rack 60 moves until the needle tube rack buckle 66 is placed in the needle tube rack clamping groove 217. The second spring 65 is compressed to realize the loading of the needle tube 63 and the needle tube rack 60.

[0050] The tail end of the biopsy needle 53 is fixedly connected to the front end of the needle holder 50, the front end of the biopsy needle 53 extends into the needle tube 63 and slides with the needle tube 63, the tail end of the needle holder 50 is provided with a needle holder buckle 56, one side of the needle holder 50 is provided with a needle holder plug 57, the needle holder push rod 51 is slidably arranged in the push rod window 12, and the needle holder push rod 51 is provided with a needle holder slot 54 adapted to the needle holder plug 57, so that the needle holder plug 57 passes through the needle holder slide groove 2 2 is plugged and matched with the needle holder slot 54, and when the needle holder push rod 51 moves, the needle holder 50 and the biopsy needle 53 are driven to move. The middle part of the needle holder stopper 25 is provided with a needle holder clamping groove 216 adapted to the needle holder buckle 56. The first spring 55 is arranged between the needle holder stopper 25 and the needle holder 50, so that the needle holder 50 moves until the needle holder buckle 56 is placed in the needle holder clamping groove 216, and the first spring 55 is compressed, so that the biopsy needle 53 and the needle holder 50 are loaded.

[0051] A conical needle rack squeezing groove 52 is also provided at the front end of the needle rack 50, so that when the needle rack 50 moves to abut against the needle tube rack block 27, the needle tube rack buckle 66 is squeezed by the needle rack squeezing groove 52, the needle tube rack buckle 66 is disengaged from the needle tube rack slot 217, and the compressed second spring 66 is fired after the needle tube rack 60 is freed from the restraint.

[0052] A conical connecting rod extrusion groove 38 matched with the needle holder buckle 56 is set in the middle of the sliding bracket 32 ​​of the firing link 30. After the safety rod 40 is unlocked, the firing link 30 is driven to move by the firing button 31. At this time, the sliding bracket 32 ​​moves in the firing chamber 26. When the sliding bracket 32 ​​moves to abut against the needle holder block 25, the needle holder buckle 56 is squeezed by the connecting rod extrusion groove 38, and the needle holder buckle 56 is separated from the needle holder slot 216. After the needle holder 50 is freed from the restraint, the compressed first spring 55 is fired, thereby realizing the movement of the needle holder 50, and the needle holder 50 realizes the firing of the needle tube holder 60.

[0053] Obviously, the above embodiments are merely examples for clearly explaining the present invention, and are not intended to limit the implementation methods of the present invention. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. However, these obvious changes or modifications derived from the spirit of the present invention are still within the protection scope of the present invention.

Claims

1. A fully automatic biopsy needle with a safety structure, comprising a needle holder assembly and a needle tube holder assembly, characterized in that: It also includes a cover body assembly, a sleeve assembly, a firing rod, a firing button, and a safety rod, wherein the sleeve assembly is placed in the cover body assembly, the firing rod is arranged between the outer wall of the sleeve assembly and the inner wall of the cover body assembly so that the firing rod slides axially along the sleeve assembly, the firing button extends into the cover body assembly and cooperates with the front end of the firing rod in transmission, a safety rod slot is arranged at the rear end of the firing rod, a safety block is arranged at the rear end of the safety rod slot, a safety slot adapted to the safety rod is arranged at the rear end of the cover body assembly so that the safety rod slides radially along the cover body assembly, a travel groove is arranged in the middle part of the safety rod, when locked, the safety block abuts against the safety rod, when unlocked, the safety rod is pushed so that the travel groove cooperates with the safety block, and the firing rod moves along the travel groove to realize firing; A rear cover is arranged at the rear end of the safety stopper to close the rear end of the cover body assembly.

2. The fully automatic biopsy needle with a safety structure according to claim 1, characterized in that: Slides are arranged on both sides of the travel groove, and the slides are lower than the two ends of the safety rod and higher than the travel groove, so that the safety block abuts against the slide when the firing link is locked, and the travel groove is placed at the safety block after the safety rod moves.

3. The fully automatic biopsy needle with a safety structure according to claim 2, characterized in that: The inner sides of both ends of the safety rod are respectively provided with limit stop bars, which are placed between the safety slots on both sides of the cover assembly during assembly, so that when the safety rod moves, the inner wall of the cover assembly blocks and limits the limit stop bars.

4. The fully automatic biopsy needle with a safety structure according to claim 2 or 3, characterized in that: The sleeve assembly includes a plug-in positioning left sleeve and a positioning right sleeve, the outer wall of the positioning left sleeve is symmetrically provided with connecting rod limit blocks, a connecting rod slide groove is formed between the two connecting rod limit blocks, and the front part of the firing connecting rod is slidably matched with the connecting rod slide groove.

5. The fully automatic biopsy needle with a safety structure according to claim 4, characterized in that: The positioning left sleeve and the positioning right sleeve both include a semicircular first sleeve portion and a second sleeve portion. After the positioning left sleeve and the positioning right sleeve are plugged into each other, the first sleeve portion forms a first cylinder and the second sleeve portion forms a second cylinder. The diameter of the first cylinder is greater than that of the second cylinder.

6. The fully automatic biopsy needle with a safety structure according to claim 5, characterized in that: The firing link includes a connecting rod body, a firing button slot is arranged at the front end of the connecting rod body, a button clamping column is arranged on the firing button, a firing window is arranged on the cover body assembly, and the button clamping column passes through the firing window and is clamped into the firing button slot, so that when the firing button outside the cover body assembly moves, the firing link is driven to move.

7. The fully automatic biopsy needle with a safety structure according to claim 6, characterized in that: The tail end of the connecting rod body is L-shaped, a sliding bracket is arranged at the tail end of the connecting rod body, and a connecting rod slot suitable for the firing connecting rod to pass through is arranged on the first sleeve part, so that the connecting rod body passes through the connecting rod slot and is placed outside the sleeve assembly.

8. The fully automatic biopsy needle with a safety structure according to claim 7, characterized in that: A needle holder block and a connecting rod block are arranged in the first sleeve part, and a firing chamber is formed between the needle holder block and the connecting rod block after the left positioning sleeve and the right positioning sleeve are plugged and matched, and the sliding bracket is placed in the firing chamber.

9. The fully automatic biopsy needle with a safety structure according to claim 8, characterized in that: Limiting brackets are arranged on both sides of the front end of the bumper slot, and the limiting brackets are placed between the bumper slot and the sliding bracket. When assembling, the limiting brackets are placed outside the connecting rod stopper.

10. The fully automatic biopsy needle with a safety structure according to claim 9, characterized in that: The cover body assembly includes a semi-cylindrical upper cover and a lower cover that are plug-fitted together. The upper cover and the lower cover are provided with sleeve limiting grooves. The outer wall of the first sleeve part is provided with a limiting column that is plug-fitted with the sleeve limiting groove. During assembly, the limiting column is placed in the sleeve limiting groove.

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