CN219270980U

CN219270980U - Needle head structure of biopsy rotary-cut puncture needle

Info

Publication number: CN219270980U
Application number: CN202223387330.XU
Authority: CN
Inventors: 李辉; 莫易凡; 陈洁; 郑佰显; 庄泳平; 苏定章; 林聪杰
Original assignee: Surgaid Medical (xiamen) Co ltd
Current assignee: Surgaid Medical (xiamen) Co ltd
Priority date: 2022-12-16
Filing date: 2022-12-16
Publication date: 2023-06-30
Anticipated expiration: 2032-12-16

Abstract

The utility model relates to a biopsy rotary-cut puncture needle head structure, which comprises a needle point and a needle seat, wherein the needle point is fixed on the needle seat; the needle tip comprises an upper blade and a lower blade, and the upper blade and the lower blade are isosceles triangles; the upper blade and the lower blade are connected in a jogged manner through a limit structure; the limiting structure is a lower limiting notch extending upwards from the middle of the bottom edge of the upper blade, and an upper limiting notch extending downwards from the top angle is arranged on the lower blade; the lower limit notch and the upper limit notch are mutually spliced; the needle tip is fixed on the needle seat to form a needle head together, and the joint of the upper blade, the lower blade and the needle seat is injection-molded and encapsulated, so that the needle head forms a conical needle head. Compared with the prior art, the utility model has the beneficial effects that: the utility model uses the blade type combined needle head, so that all the cutting edges keep consistent sharpening angles, the sharpness of the cutting edges is ensured, the pulling of focus parts of patients in the puncturing process can be effectively reduced, and the damage to patients is reduced.

Description

Needle head structure of biopsy rotary-cut puncture needle

Technical Field

The utility model relates to the field of medical appliances, in particular to a needle head structure of a biopsy rotary-cut puncture needle.

Background

The biopsy rotary-cut puncture needle is used for clinical biopsy sampling, the puncture needle head plays a role in puncture, the needle head is in a conical shape, the common needle head forms divided according to the edge number of the cutting edge are double-prismatic, triangular and quadrangular needle heads, and the triple-concave puncture needle head in the triangular needle head is generally adopted in the market at present. If the sharpness of the needle point or the cutting edge of the puncture needle is insufficient, the required puncture force is large, the puncture process is unsmooth, the damage to tissues in the puncture process is easy to aggravate, the operation difficulty of doctors is increased, and the operation efficiency is influenced, so that the guarantee of the sharpness of the needle point of the puncture needle is very important.

The puncture force of the puncture needle head is influenced by the sharpening angle and sharpness of the blade: the smaller the sharpening angle, the sharper the blade and the smaller the penetration force. In the prior art, a three-concave triangular puncture needle is generally adopted as a biopsy rotary-cut puncture needle, the biopsy rotary-cut puncture needle is limited by a processing technology, the angle of a part of the three-concave triangular puncture needle is larger, a material is not suitable for high-hardness materials, one edge of the three-concave triangular puncture needle faces against the edge along the edge opening of a ball head in the milling process of the ball head cutter, the edge which is processed against the edge is extremely easy to damage, and the sharpness is difficult to ensure; the double-prismatic needle is easy to process due to the reduction of edges, but the resistance on two sides is larger in the double-prismatic puncturing process, and the puncturing force is larger.

Disclosure of Invention

The utility model aims to provide a biopsy rotary-cut puncture needle head structure with a combined needle head, which can make the needle head sharper.

The utility model is realized by the following technical scheme: the biopsy rotary-cut puncture needle head structure comprises a needle point and a needle seat 5, wherein the needle point is fixed on the needle seat 5; the needle point comprises an upper blade 1 and a lower blade 2, and the upper blade 1 and the lower blade 2 are isosceles triangles; the upper blade 1 and the lower blade 2 are connected in a jogged manner through a limit structure;

the limiting structure comprises a lower limiting notch 3 which is formed by the upper blade 1 and extends upwards from the middle part of the bottom edge, and an upper limiting notch 4 which is formed by the lower blade 2 and extends downwards from the top angle; the lower limit notch 3 and the upper limit notch 4 are mutually spliced;

the needle tip is fixed on the needle seat 5 to form a needle head together, and the joint of the upper blade 1, the lower blade 2 and the needle seat 5 is injection-molded and encapsulated, so that the needle head forms a conical needle head.

Compared with the prior art, the utility model has the beneficial effects that:

1. the utility model uses the blade type combined needle head, so that all the cutting edges keep consistent sharpening angles, the sharpness of the cutting edges is ensured, the pulling of focus parts of patients in the puncturing process can be effectively reduced, and the damage to patients is reduced.

2. The blade used in the utility model has simple and convenient forming process, is not limited by the processing technology, can use high-hardness materials or heat treatment to improve the hardness of the materials, and can ensure the sharpness of the needle point more easily when a single blade tip is directly used as the needle point.

3. The needle rudiment is reinforced through injection molding rubber coating, and meanwhile, the included angle between the filling blades forms a conical structure, so that the resistance in the puncturing process can be effectively reduced, the puncturing force is reduced, and the operating efficiency is improved.

Drawings

FIG. 1 is a schematic diagram of the structure of the present utility model;

FIG. 2 is a schematic view of the engagement structure of the upper blade and the lower blade;

FIG. 3 is a graph showing the effect of the injection molding encapsulation based on FIG. 2.

FIG. 4 is a schematic diagram of the process of embodiment 1 of the present utility model;

fig. 5 is a schematic diagram of the process according to embodiment 2 of the present utility model.

Description of the reference numerals: the novel plastic packaging structure comprises an upper blade 1, a lower blade 2, a lower limit notch 3, an upper limit notch 4, a needle seat 5, a limit boss 51, a cross limit groove 52 and a rubber coating area 6.

Detailed Description

The present utility model will be described in detail with reference to the accompanying drawings, but the protection of the present utility model is not limited to the following:

as shown in fig. 1-3: the biopsy rotary-cut puncture needle head structure comprises a needle point and a needle seat 5, wherein the needle point is fixed on the needle seat 5; the needle point comprises an upper blade 1 and a lower blade 2, and the upper blade 1 and the lower blade 2 are isosceles triangles; the upper blade 1 and the lower blade 2 are connected in a jogged manner through a limit structure;

the limiting structure comprises a lower limiting notch 3 which is formed by the upper blade 1 and extends upwards from the middle part of the bottom edge, and an upper limiting notch 4 which is formed by the lower blade 2 and extends downwards from the top angle; the lower limit notch 3 and the upper limit notch are mutually inserted 4;

The blade type combined needle head ensures that all the cutting edges keep consistent sharpening angles, ensures the sharpness of the cutting edges, can effectively reduce the pulling of focus parts of patients in the puncturing process, and reduces the damage to the patients.

In addition, the junction of the upper blade 1, the lower blade 2 and the needle seat 5 is subjected to injection molding and encapsulation to form an encapsulation area 6, so that the needle head forms a conical needle head, the puncture force can be reduced, and the operation efficiency is improved.

As shown in fig. 4, in the first embodiment of the present utility model, the needle seat 5 is provided with a limiting boss 51, the limiting boss 51 is provided with a cross limiting groove 52, and the needle tip is embedded in the cross limiting groove 52.

The upper blade is used as a main blade, and the tip of the upper blade is used as a needle point; the upper blade and the lower blade are inserted into the cross limiting groove after being combined. Then, the needle embryonic form is subjected to injection molding and encapsulation to further fix the included angle between the blades and the perpendicularity of the blades, and meanwhile, the included angle between the blades is filled to form a conical structure to be used as a needle main body, so that the quadrangular blade type combined needle is formed.

In fig. 5, in a second embodiment of the present utility model, the needle seat 5 is provided with a cross groove, and the needle tip is embedded in the cross groove.

The upper blade is used as a main blade, and the tip of the upper blade is used as a needle point; the upper blade and the lower blade are inserted into the cross groove after being combined. Then, the needle embryonic form is subjected to injection molding and encapsulation to further fix the included angle between the blades and the perpendicularity of the blades, and meanwhile, the included angle between the blades is filled to form a conical structure to be used as a needle main body, so that the quadrangular blade type combined needle is formed.

While the utility model has been illustrated and described with respect to specific embodiments and alternatives thereof, it will be appreciated that various changes and modifications can be made therein without departing from the spirit of the utility model. It is, therefore, to be understood that the utility model is not to be in any way limited except by the appended claims and their equivalents.

Claims

1. A biopsy rotary-cut puncture needle head structure, which is characterized in that: comprises a needle point and a needle seat (5), wherein the needle point is fixed on the needle seat (5); the needle point comprises an upper blade (1) and a lower blade (2), and the upper blade (1) and the lower blade (2) are isosceles triangles; the upper blade (1) and the lower blade (2) are connected in a jogged manner through a limit structure;

the limiting structure comprises a lower limiting notch (3) which is formed by the upper blade (1) and extends upwards from the middle of the bottom edge, and an upper limiting notch (4) which is formed by the lower blade (2) and extends downwards from the top angle; the lower limit notch (3) and the upper limit notch (4) are mutually spliced;

the needle tip is fixed on the needle seat (5) to form a needle head together, and the joint of the upper blade (1), the lower blade (2) and the needle seat (5) is subjected to injection molding and encapsulation, so that the needle head forms a conical needle head.

2. A biopsy rotary cutting needle tip structure as defined in claim 1, wherein: the needle seat (5) is provided with a limiting boss (51), the limiting boss (51) is provided with a cross limiting groove (52), and the needle point is embedded in the cross limiting groove.

3. A biopsy rotary cutting needle tip structure as defined in claim 1, wherein: the needle seat (5) is provided with a cross groove, and the needle point is embedded in the cross groove.