Sandwich cutter head structure of rotary cutting biopsy needle

Abstract

The utility model discloses a rotary cutting biopsy needle sandwich cutter head structure, which comprises a rotary cutting biopsy needle, the rotary cutting biopsy needle is composed of a blade, a cutter head wrapping part, a lower air pipe and an outer cutter tube, the blade and the cutter head wrapping part are fixed on the front side of the rotary cutting biopsy needle, the lower air pipe is parallelly connected to the outer peripheral surface of the outer cutter tube, and the outer cutter tube is fixed on the lower air pipe. The outer knife tube and the lower air tube are fixedly connected to the rear portion of the blade and the rear portion of the knife head wrapping piece, and according to the sandwich knife head structure of the rotary-cut biopsy needle, the blade, the stop buckle, the stop groove, the knife head wrapping piece, the hasp, the hasp groove, the lower air tube and the outer knife tube are arranged, so that the manufacturing process of the structure is simplified conveniently; medical sealants are smeared at the connecting positions between the knife head wrapping piece and the outer knife tube as well as between the knife blade and the lower air tube, so that the sealing performance of the lower air tube is ensured, the structure is uniform in stress in the puncture process, vibration and deviation are reduced, and the operation smoothness is improved.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a sandwich blade structure for a rotary biopsy needle. Background Technology

[0002] Breast biopsy is an indispensable step in diagnosing breast diseases, and its accuracy and efficiency directly affect the patient's treatment outcome. As one of the surgical instruments used to perform this crucial step, the performance of the excision biopsy needle is particularly important. However, existing excision biopsy needles have significant drawbacks in their tip design.

[0003] 1. Most of the existing rotary biopsy needle tips on the market are made of integral metal. Because they need to be welded to the rotary biopsy tube, this process limits the choice of materials. With continuous use, the dulling of the cutting edge will lead to a significant increase in the risk of sampling failure.

[0004] 2. The integrally machined cutter head structure makes the machining process more complex and increases the difficulty of machining. This not only increases the manufacturing cost, but the welding structure also makes assembly more complicated, which brings certain technical challenges to the manufacturer.

[0005] 3. The laser welding assembly of the cutter head and tube may be affected by environmental factors (such as temperature, humidity, vibration, etc.) and equipment aging in practical applications, leading to decreased stability during the welding process. Laser welding requires extremely high workpiece positioning accuracy. Inaccurate workpiece positioning or deviations will directly affect the welding quality and weld appearance, potentially resulting in welding defects such as porosity, cracks, and lack of fusion. Due to the complexity and invisibility of the welding process (such as the invisibility of the laser beam), quality control is relatively difficult.

[0006] The aforementioned issues limit the widespread use of high-quality biopsy needles in medical institutions, increase the difficulty of the procedure and patient discomfort, and raise the risk of sampling failure, potentially affecting diagnostic accuracy and delaying treatment. This is especially problematic in areas with relatively scarce medical resources, where patients may be unable to access high-quality medical services, while also increasing their financial burden. Utility Model Content

[0007] The technical problem to be solved by this utility model is to overcome the existing defects and provide a sandwich blade structure for a rotary biopsy needle, which reduces the purification problem of biopsy, improves the convenience of assembly and structure, and effectively reduces patient pain and medical costs, thus effectively solving the problems in the background art.

[0008] To achieve the above objectives, this utility model provides the following technical solution:

[0009] A rotary biopsy needle sandwich tip structure includes a rotary biopsy needle, which is composed of a blade, a tip cover, a lower endotracheal tube, and an outer tube. The blade and tip cover are fixed to the front side of the rotary biopsy needle. The lower endotracheal tube is connected parallel to the outer circumferential surface of the outer tube. The outer tube and the lower endotracheal tube are fixedly connected to the rear of the blade and tip cover. A snap fastener is provided at the opening at the front end of the outer tube. A snap fastener groove is provided on the side of the rear end of the tip cover to cooperate with the snap fastener. A stop buckle is provided on the inner wall of the lower endotracheal tube. A stop groove is provided on the side of the rear end of the tip cover to cooperate with the stop buckle.

[0010] As a preferred embodiment of this utility model, the blade is specifically an X40Cr13 stainless steel blade.

[0011] As a preferred technical solution of this utility model, the blade cover is formed on the blade by injection molding.

[0012] As a preferred embodiment of this utility model, the cutting edges on both sides of the blade are symmetrical to its center line.

[0013] As a preferred technical solution of this utility model, the cutter head cover and the blade form a cutter head, and the cutter head is specifically a combined sandwich structure.

[0014] As a preferred embodiment of this utility model, the connection between the blade cover and the blade and the outer blade tube and the lower air tube is coated with medical sealant.

[0015] Compared with the prior art, the beneficial effects of this utility model are:

[0016] 1. The sandwich blade structure of this rotary biopsy needle simplifies the manufacturing process by setting up the blade, stop buckle, stop groove, blade cover, hook, hook groove, lower air tube and outer blade tube, which reduces the processing difficulty and manufacturing cost, while also ensuring high structural stability.

[0017] 2. Medical sealant is applied to the connection between the blade and the outer tube and the lower trachea to ensure the airtightness of the lower trachea, thereby ensuring that the structure is subjected to uniform force during puncture, reducing vibration and displacement, and improving the smoothness of operation.

[0018] 3. This structure does not require welding to the rotary cutting tube, avoiding the process limitation on material selection, and thus allowing for flexible selection of the cutting head material, which can solve the problem of cutting edge dulling after a period of use;

[0019] In summary, this utility model achieves innovation in material use and optimization in process through structural design, reducing material costs and improving production efficiency, promoting the widespread use of high-quality biopsy needles, alleviating the economic burden on patients, and improving the level of medical services. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model.

[0021] Figure 2 This is a schematic diagram of the assembly structure of the blade and outer blade tube of this utility model.

[0022] Figure 3 This is a partially enlarged structural diagram of part A of this utility model.

[0023] Figure 4 This is a partially enlarged structural diagram of section B of this utility model.

[0024] Figure 5 This is a schematic diagram of the assembly structure of the hook and latch groove of this utility model.

[0025] In the diagram: Blade 1, Stop latch 11, Stop groove 12, Blade head cover 2, Hook and loop 21, Hook and loop groove 22, Lower air tube 3, Outer blade tube 4. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] Please see Figure 1-5 This utility model provides a technical solution:

[0028] A rotary biopsy needle sandwich tip structure includes a rotary biopsy needle, which is composed of a blade 1, a tip cover 2, a lower air tube 3, and an outer blade tube 4. The blade 1 and the tip cover 2 are fixed to the front side of the rotary biopsy needle. The lower air tube 3 is connected in parallel to the outer circumferential surface of the outer blade tube 4. The outer blade tube 4 and the lower air tube 3 are fixedly connected to the rear of the blade 1 and the tip cover 2. A buckle 21 is provided at the opening at the front end of the outer blade tube 4. A buckle groove 22 that mates with the buckle 21 is provided on the side of the rear end of the tip cover 2. A stop buckle 11 is provided on the inner wall of the lower air tube 3. A stop groove 12 that mates with the stop buckle 11 is provided on the side of the rear end of the tip cover 2.

[0029] Blade 1 is specifically an X40Cr13 stainless steel blade.

[0030] The blade cover 2 is injection molded onto the blade 1 using a mold.

[0031] The cutting edges on both sides of blade 1 are symmetrical to its center line.

[0032] The cutter head consists of the cutter head cover 2 and the blade 1, and the cutter head is specifically a combined sandwich structure.

[0033] Medical sealant is applied to the connection points between the blade cover 2 and the blade 1 with the outer blade tube 4 and the lower trachea 3 to ensure the sealing of the lower trachea 3, ensure that the structure is subjected to uniform force during puncture, reduce vibration and displacement, and improve the smoothness of operation.

[0034] Most of the existing rotary biopsy needle tips on the market are made of integral metal. Because they need to be welded to the rotary biopsy tube, this process limits the choice of materials. With continuous use, the dulling of the cutting edge will lead to a significant increase in the risk of sampling failure. This structure does not need to be welded to the outer tube, so the material of the tip can be flexibly selected.

[0035] Based on extensive research and consultation, this design utilizes X40Cr13 stainless steel as the blade body. Compared to the currently used 17-4 stainless steel, X40Cr13 stainless steel offers advantages in cost, machinability, hardness, wear resistance, corrosion resistance, and biocompatibility, as shown in Table 1 (material performance comparison). In particular, its hardness and wear resistance reach high levels, effectively addressing the issue of edge dulling with continuous use and also reducing costs.

[0036] Table 1 Comparison of Material Properties

[0037] Material Hardness and wear resistance Corrosion resistance Biocompatibility Processing performance cost 17-4 high outstanding good good higher X40Cr13 high Excellent Excellent Excellent Moderate

[0038] The cutter head of this structure consists of a blade 1 and a cutter head cover 2, and is specifically a sandwich structure. The blade 1 is cut by laser cutting and then finely ground to the required size by automated grinding equipment. The cutter head cover 2 is made by injection molding technology, which accurately places the blade 1 in the mold, ensuring that the blade 1 and the cover 2 are seamless and firmly connected, which simplifies the manufacturing process and reduces the processing difficulty and manufacturing cost.

[0039] Compared to traditional welding assembly, this structure uses double fixing with buckles 21 and buckle grooves 22, and stop buckles 11 and stop grooves 12. The buckles 21 on both sides of the outer blade tube 4 are locked in the buckle grooves 22 of the blade head cover 2, and then the stop buckles 11 on the lower air pipe 3 are locked in the stop grooves 12 of the blade head cover 2.

[0040] The distance from the tip of the blade 1 to the outer blade tube 4 is 7.3 mm, and the maximum width of the blade 1 is 5.8 mm.

[0041] During assembly, the outer blade tube 4 is aligned with the blade head consisting of the blade 1 and the blade head cover 2. The buckle 21 on the outer blade tube 4 is pressed into the buckle groove 22 of the blade head cover 2, and the stop buckle 11 of the lower air pipe 3 is inserted into the stop groove 12 of the blade head cover 2.

[0042] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A sandwich-shaped biopsy needle structure, comprising a rotary biopsy needle, characterized in that: The biopsy needle is composed of a blade (1), a blade cover (2), a lower air tube (3), and an outer blade tube (4). The blade (1) and the blade cover (2) are fixed to the front side of the biopsy needle. The lower air tube (3) is connected in parallel to the outer circumferential surface of the outer blade tube (4). The outer blade tube (4) and the lower air tube (3) are fixedly connected to the rear of the blade (1) and the blade cover (2). The opening at the front end of the outer blade tube (4) is provided with a buckle (21). The side of the rear end of the blade cover (2) is provided with a buckle groove (22) that cooperates with the buckle (21). The inner wall of the lower air tube (3) is provided with a stop buckle (11). The side of the rear end of the blade cover (2) is provided with a stop groove (12) that cooperates with the stop buckle (11).

2. The sandwich blade structure of the rotary biopsy needle according to claim 1, characterized in that: The blade (1) is specifically an X40Cr13 stainless steel blade.

3. The sandwich blade structure of the rotary biopsy needle according to claim 1, characterized in that: The blade cover (2) is injection molded onto the blade (1) by a mold.

4. The sandwich blade structure of the rotary biopsy needle according to claim 1, characterized in that: The cutting edges on both sides of the blade (1) are symmetrical to its center line.

5. The sandwich blade structure of the rotary biopsy needle according to claim 1, characterized in that: The cutter head is composed of the cutter head cover (2) and the blade (1), and the cutter head is specifically a combined sandwich structure.

6. The sandwich blade structure of the rotary biopsy needle according to claim 1, characterized in that: Medical sealant is applied to the connection points between the blade cover (2) and the blade (1) and the outer blade tube (4) and the lower trachea (3).

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