Blade structure of rotary cutting biopsy needle tool bit

Abstract

The utility model discloses a blade structure of a rotary-cut biopsy needle tool bit, which belongs to the technical field of rotary-cut biopsy needle puncture tool bits and comprises a blade and a coating layer coated on the outer side of the blade. The blade is triangular, cutting edges are arranged on the two side edges of the blade, the cutting edges are linear cutting edges, and the cutting edges on the two side edges of the blade are symmetrical to the center line of the tool bit. Grooves are formed in two surfaces of the blade; the two side edges of the groove and the two side edges of the cutting edge are arranged in parallel. The biopsy needle cutter head is used for solving the problems that the sharpness of the cutting edge of the biopsy needle cutter head is insufficient and the puncture force is insufficient.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of rotary biopsy needle puncture knife head, concretely is a rotary biopsy needle knife head blade structure. BACKGROUND

[0002] In the field of minimally invasive medical treatment, breast biopsy as an important means of disease diagnosis, its operation efficiency and safety are the prerequisite for the treatment effect of patients. Rotary biopsy needle, as the key medical instrument in the process, its puncture performance is the core element to ensure the safety and efficiency of the operation.

[0003] At present, the knife head circulating in the market is usually prepared by one-piece forming process. Since there is a thick cladding layer on both sides of the blade, the one-piece forming knife head is not convenient for processing the cutting edge when processing the cutting edge, which may result in insufficient sharpness of the cutting edge and insufficient puncture force, thereby causing frequent puncture force attenuation in one operation. In the precise diagnosis path of breast disease, this performance change of the rotary biopsy needle may trigger a chain reaction and have a profound impact on the diagnosis result. The weakening of the puncture force is directly related to the efficiency of sample collection and the personal safety of patients, making it difficult for doctors to obtain diseased tissue at one time, thereby challenging the reliability boundary of pathological diagnosis. The insufficient puncture force also increases the complexity of the operation, prolongs the operation time, and increases the physiological and psychological burden of patients during the operation. More seriously, frequent puncture attempts and angle adjustment increase the unnecessary damage risk to the surrounding healthy tissue, and the incidence of complications such as bleeding and hematoma also rises. These complications not only delay the postoperative rehabilitation process of patients, but also may increase their economic and psychological burden, and have a negative impact on the overall treatment experience. UTILITY MODEL CONTENT

[0004] In view of the above problems, the utility model provides a rotary biopsy needle knife head blade structure for solving the problems of insufficient sharpness of the biopsy needle knife head cutting edge and insufficient puncture force.

[0005] To achieve the above purpose, the utility model adopts the technical scheme of:

[0006] A rotary biopsy needle knife head blade structure, comprising a blade, a cladding layer cladded on the outer side of the blade; the blade is triangular in shape, and the two side edges of the blade are provided with cutting edges; the cutting edges are straight cutting edges, and the two side edge cutting edges of the blade are symmetrical to the center line of the knife head; the two surfaces of the blade are provided with grooves; and the two side edges of the grooves are parallel to the two side edges of the cutting edges.

[0007] As a further improvement of the above technical solution, the middle part of the blade is provided with a through hole, and the middle part of the cladding layer is provided with a protrusion matched with the through hole.

[0008] As a further improvement of the above technical solution, the rear side of the blade is provided with a protrusion, and the rear side of the cladding layer is provided with a groove matched with the protrusion.

[0009] As a further improvement of the above technical solution, the shape of the protrusion is stepped.

[0010] As a further improvement of the above technical solution, the included angle α between the two side edges of the blade is 50°-60°, and the included angle β of the edge is 30°-35°.

[0011] As a further improvement of the above technical solution, the length L of the two side edges of the blade is 5.76-6.14mm, and the width W of the two side edges of the blade is 0.5-1.2mm.

[0012] As a further improvement of the above technical solution, the thickness H of the blade is 0.32-0.66mm, the distance L1 between the center of the through hole and the rear side edge of the blade is 1.6-2.6mm, and the diameter ∮ of the through hole is 1.5-2.2mm.

[0013] As a further improvement of the above technical solution, the two side edges of the groove are respectively coincided with the edges of the inner sides of the two edges of the blade.

[0014] As a further improvement of the above technical solution, the material of the blade is X40Cr13 stainless steel.

[0015] Compared with the prior art, the utility model has the advantages of:

[0016] X40Cr13 stainless steel is used as the material of the blade, so that the blade has excellent hardness and wear resistance, is suitable for various corrosion environments, and has good stability; after being prepared into a blade, the two side edges do not have puncture force attenuation phenomenon in one operation;

[0017] The straight edge of the blade edge has good puncture stability, the cutting force distribution is relatively uniform, and excessive local stress concentration is not easy to occur; such stability helps to ensure the accuracy and depth of puncture, especially in the case of strong puncture;

[0018] The cutter head is prepared by combining the blade with the cladding layer, wherein the cladding layer is arranged outside the blade by injection molding, which is convenient for processing the blade edge, can enhance the sharpness of the blade edge, and further improve the puncture force of the cutter head.

[0019] The two-face recesses of the blade are arranged for limiting during overmolding to ensure that the blade and the overmolded layer are free of excess overmolding burrs on both sides during overmolding; the through hole arranged at the center of the blade facilitates connection of the overmolded layer and prevents separation of the overmolded layer from the blade during puncture; the boss at the tail of the blade and the recess at the rear side of the overmolded layer can prevent the blade from swinging up and down in the overmolded layer.

[0020] The included angle between the blade edges on both sides of the blade and the setting of the blade edge included angle can improve the puncture force and efficiency of the entire cutter head and effectively alleviate the pain of the patient. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a three-dimensional structure schematic diagram of the utility model.

[0022] Figure 2 It is a three-dimensional structure explosion schematic diagram of the utility model.

[0023] Figure 3 It is a blade structure schematic diagram of the utility model.

[0024] Figure 4 It is Figure 3 It is a sectional structure schematic diagram at A-A.

[0025] Figure 5 It is Figure 4 It is a local enlarged structure schematic diagram at B.

[0026] Figure 6 It is a blade three-dimensional structure schematic diagram of the utility model.

[0027] In the figure: 1, blade; 2, overmolded layer; 11, blade edge; 12, recess; 13, through hole; 14, boss; 21, protrusion; 22, depression. DETAILED DESCRIPTION

[0028] In order for those skilled in the art to better understand the technical scheme of the utility model, the utility model is described in detail below in combination with embodiments, and the description in this part is only exemplary and explanatory and should not have any limiting effect on the protection scope of the utility model. EMBODIMENT

[0029] A rotary biopsy needle cutter head blade structure, comprising a blade and an overmolded layer overmolded on the outer side of the blade; the blade is triangular in shape, the two side edges of the blade are provided with blade edges, the blade edges are straight blade edges, and the blade edges on the two side edges of the blade are symmetrical to the center line of the cutter head; the two faces of the blade are provided with recesses; the two side edges of the recesses are parallel to the two side edges of the blade edges.

[0030] As a preferred mode of the above embodiment, the middle part of the blade is provided with a through hole, and the middle part of the cladding layer is provided with a protrusion matched with the through hole, and the cladding layer is arranged outside the blade through an injection molding process.

[0031] As a preferred mode of the above embodiment, the rear side of the blade is provided with a protrusion, and the rear side of the cladding layer is provided with a recess matched with the protrusion.

[0032] As a preferred mode of the above embodiment, the shape of the protrusion is stepped.

[0033] As a preferred mode of the above embodiment, the angle of the included angle α between the two side edges of the blade is 50°-60°, and the angle of the included angle β of the edges is 30°-35°.

[0034] As a preferred mode of the above embodiment, the length L of the two side edges of the blade is 5.76-6.14 mm, and the width W of the two side edges of the blade is 0.5-1.2 mm.

[0035] As a preferred mode of the above embodiment, the thickness H of the blade is 0.32-0.66 mm, the distance L1 between the center of the through hole and the rear side of the blade is 1.6-2.6 mm, and the diameter ∮ of the through hole is 1.5-2.2 mm.

[0036] As a preferred mode of the above embodiment, the two side edges of the groove respectively coincide with the edges of the inner sides of the two edges of the blade.

[0037] As a preferred mode of the above embodiment, the material of the blade is X40Cr13 stainless steel.

[0038] The straight blade has good puncture stability, relatively uniform cutting force distribution, and is not easy to produce excessive local stress concentration. This stability helps to ensure the accuracy and depth of puncture, especially in situations where strong puncture is required. The sharpness of the integrally formed blade is poor, and the blade is blunt, which weakens the puncture force. The sharpness of the blade of the present scheme after laser cutting and precision grinding is much higher than that of the integrally formed blade, which further improves the puncture force of the blade of the tool head, thereby improving the efficiency and safety of the operation, reducing the economic burden and psychological burden of the patient.

[0039] The grooves on both sides of the blade are used for injection molding limiting to ensure that there is no excess injection molding burr on both sides of the blade and the blade during injection molding of the cladding layer, and to avoid the situation that the edge of the cladding layer protrudes from the side of the blade.

[0040] It should be noted that the terms "comprises", "comprising", or any other variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but can also include other elements not expressly listed or inherent to such process, method, article, or apparatus.

[0041] The principles and implementation manners of the present application are described by using specific examples in the present application. The above examples are only used to help understand the method of the present application and its core idea.

[0042] The above is only the preferred embodiment of the present application. It should be noted that due to the limited nature of the language expression, there are objectively infinite specific structures. For ordinary skilled persons in the technical field, some improvements, refinements or changes can be made without departing from the principles of the present application. The above technical features can also be combined in an appropriate manner. These improvements, refinements, changes or combinations, or the direct application of the concept and technical solution of the present application to other occasions without improvement, shall be regarded as the protection scope of the present application.

Claims

1. A rotary biopsy needle cutting head blade structure, characterized by, The utility model provides a kind of cutting blade, including blade, cladding layer cladded outside blade;The blade is triangular, and two side edges of the blade are provided with blade edge, the blade edge is straight blade edge, and the blade edge of two side edges of the blade is symmetrical with the center line of tool bit;Two sides of the blade are provided with recess;Two side edges of the recess are parallel with two side edges of the blade edge.

2. A rotary biopsy needle cutting head blade structure according to claim 1, wherein, The middle part of the blade is provided with through hole, and the middle part of the cladding layer is provided with protrusion matched with through hole, and the cladding layer is set outside the blade by injection molding process.

3. The biopsy needle cutting head blade structure of claim 1, wherein, The rear side of the blade is provided with boss, and the rear side of the cladding layer is provided with recess matched with boss.

4. The biopsy needle cutting head blade structure of claim 3, wherein, The boss is in the shape of step.

5. The biopsy needle cutting head blade structure of claim 1, wherein, The angle α between two side blade edges of the blade is 50°-60°, and the angle β of blade edge is 30°-35°.

6. The biopsy needle cutting head blade structure of claim 1, wherein, The length L of two side blade edges of the blade is 5.76-6.14mm, and the width W of two side blade edges of the blade is 0.5-1.2mm.

7. The biopsy needle cutting head blade structure of claim 2, wherein, The thickness H of the blade is 0.32-0.66mm, the distance L1 between the center of through hole and the rear side edge of the blade is 1.6-2.6mm, and the diameter ∮ of the through hole is 1.5-2.2mm.

8. The biopsy needle cutting head blade structure of claim 1, wherein, Two side edges of the recess are respectively coincided with the edge of the inner side of two blade edges of the blade.

9. The biopsy needle cutting head blade structure of claim 1, wherein, The material of the blade is X40Cr13 stainless steel.

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