Breast rotary cutting biopsy needle with high-precision feed stroke

Abstract

The utility model discloses a breast rotary cutting biopsy needle with high-precision feed stroke, which comprises a handle, an outer cutter tube and an inner cutter tube, a cutter body transmission part is mounted in a shell of the handle, and a first driving gear drives a first driven gear through a first intermediate gear to transmit torque so as to control the rotation of the inner cutter tube and an inner cutter mounted on the inner cutter tube; the second driving gear drives the second driven gear to transmit torque through the second intermediate gear so as to control the inner cutter tube and the inner cutter mounted on the inner cutter tube to advance and retreat; a Hall gear sensor used for judging the cutter feeding position of the inner cutter pipe is further installed in the shell of the handle. According to the breast rotary cutting biopsy needle with the high-precision feed stroke, a chain is changed into gear transmission, two middle gears are additionally arranged in the middle, and torsion and precision are improved; a Hall gear sensor is used for judging the feeding position of the inner cutter pipe.

Description

Technical Field

[0001] This utility model relates to the technical field of biological tissue sampling equipment, and in particular to a breast biopsy needle with high precision infeed stroke. Background Technology

[0002] Breast biopsy needles are a diagnostic technique used under ultrasound guidance to puncture a breast lump and obtain a biopsy sample. The needle relies on gears in the handle to drive the blade's movement, including cutting and retraction. Currently, some biopsy needles on the market use a chain for transmission between the handle gears, resulting in poor torque and accuracy. Furthermore, the blade's internal tube moves in a 360-degree rotating motion, relying on a voltage signal generated after the motor stalls to determine if it has reached the top position, which is not precise enough. Each time the blade reaches the top, it continues to move for a while before stopping, leading to blade wear and the resulting debris affecting patient recovery. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a breast biopsy needle with high precision in the infeed stroke in order to overcome the shortcomings of the existing technology.

[0004] The technical solution adopted in this utility model is: a high-precision breast biopsy needle with a high-precision infeed stroke, comprising a handle, an outer blade tube, and an inner blade tube. The outer blade tube and the inner blade tube are installed at the front end of the handle. A blade transmission component is installed in the housing of the handle. The blade transmission component includes a first transmission assembly and a second transmission assembly. The first transmission assembly includes a first driving gear, a first driven gear, and a first motor drive shaft. The second transmission assembly includes a second driving gear, a second driven gear, and a second motor. The first transmission assembly also includes a first intermediate gear, which meshes with the first driving gear and the first driven gear respectively. The first motor drive shaft is powered by the first motor. The first drive gear is driven to rotate under the driving action. The first drive gear drives the first driven gear to transmit torque through the first intermediate gear to control the rotation of the inner cutter tube and the inner cutter mounted on the inner cutter tube. The second transmission assembly also includes a second intermediate gear, which meshes with the second drive gear and the second driven gear respectively. The second drive gear rotates under the power drive of the second motor. The second drive gear drives the second driven gear to transmit torque through the second intermediate gear to control the advance and retreat of the inner cutter tube and the inner cutter mounted on the inner cutter tube. A Hall gear sensor for determining the advance position of the inner cutter tube is also installed in the housing of the handle.

[0005] To be further specific, the first motor drive shaft drives the first drive gear to rotate 360° in both directions under the power of the first motor.

[0006] To be further specific, the second drive gear achieves 360° forward and reverse rotation under the power drive of the second motor.

[0007] To be further specific, the diameter of the first driving gear is greater than the diameter of the first intermediate gear, and the diameter of the first driven gear is greater than the diameter of the first driving gear.

[0008] To be further specific, the diameter of the second driven gear is greater than the diameter of the second driving gear, and the diameter of the second intermediate gear is greater than the diameter of the second driven gear.

[0009] To be further specific, the diameter of the first driven gear is larger than the diameter of the second intermediate gear.

[0010] Compared with the prior art, the present invention has the following advantages: the breast biopsy needle with high precision infeed stroke of the present invention changes the chain to gear transmission and adds two intermediate gears in the middle position, which improves torque and accuracy; a Hall gear sensor is used to determine the infeed position of the inner blade tube. When the gear rotates one tooth, it will generate a pulse wave. The chip reads the pulse wave and counts it, so that the infeed position of the inner blade tube can be determined well. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the external structure of the breast biopsy needle of this utility model;

[0012] Figure 2 This is a schematic diagram of the blade transmission component. Figure 1 ;

[0013] Figure 3 This is a schematic diagram of the blade transmission component. Figure 2 .

[0014] The following are the labels in the diagram: 1. Handle; 2. First driving gear; 3. First intermediate gear; 4. First driven gear; 5. First motor drive shaft; 6. Second driving gear; 7. Second intermediate gear; 8. Second driven gear; 9. Motor; 10. Hall effect gear sensor. Detailed Implementation

[0015] The embodiments of this utility model are described in detail below. The embodiments are implemented based on the technical solution of this utility model, and detailed implementation methods and specific operation processes are given. However, the protection scope of this utility model is not limited to the following embodiments.

[0016] See Figures 1-3The present invention relates to a high-precision breast biopsy needle with a high-precision infeed stroke, comprising a handle 1, an outer blade tube, and an inner blade tube. The outer blade tube and the inner blade tube are installed at the front end of the handle 1. A blade transmission component is installed in the housing of the handle 1, and the blade transmission component includes a first transmission assembly and a second transmission assembly.

[0017] The first transmission assembly includes a first driving gear 2, a first driven gear 4, and a first motor drive shaft 5. The first transmission assembly also includes a first intermediate gear 3, which meshes with both the first driving gear 2 and the first driven gear 4. Driven by the power of the first motor, the first motor drive shaft 5 rotates the first driving gear 2. The first driving gear 2, through the first intermediate gear 3, drives the first driven gear 4 to transmit torque, thereby controlling the rotation of the inner tool tube and the inner tool mounted on it. Specifically, driven by the power of the motor, the first motor drive shaft 5 drives the first driving gear 2 to rotate 360° in both directions, thus enabling the inner tool tube and the inner tool to rotate 360° in both directions. The first motor is a DC brushed motor.

[0018] The second transmission assembly includes a second driving gear 6, a second driven gear 8, and a second motor 9. It also includes a second intermediate gear 7, which meshes with both the second driving gear 6 and the second driven gear 8. The second driving gear 6 rotates under the power of the second motor 9, and transmits torque to the second driven gear 8 via the second intermediate gear 7 to control the forward and backward movement of the inner tool tube and the inner tool mounted on it. Specifically, the second driving gear 6 rotates 360° in both directions under the power of the second motor 9, thus enabling the forward and backward movement of the inner tool tube and the inner tool. The second motor 9 is a DC brushed motor.

[0019] Preferably, the diameter of the first driving gear 2 is larger than the diameter of the first intermediate gear 3, and the diameter of the first driven gear 4 is larger than the diameter of the first driving gear 2. The diameter of the second driven gear 8 is larger than the diameter of the second driving gear 6, and the diameter of the second intermediate gear 7 is larger than the diameter of the second driven gear 8. The diameter of the first driven gear 4 is larger than the diameter of the second intermediate gear 7. More preferably, the diameter of the first driving gear 2 is slightly larger than the diameter of the first intermediate gear 3, the diameter of the second intermediate gear 7 is slightly larger than the diameter of the second driven gear 8, and the diameter of the first driving gear 2 is the same as the diameter of the second driving gear 6. More preferably, the number of teeth of the first driving gear 2 is the same as the number of teeth of the second driving gear 6, the number of teeth of the first driving gear 2 is greater than the number of teeth of the first intermediate gear 3, the number of teeth of the second driven gear 8 is greater than the number of teeth of the first driving gear 2, the number of teeth of the second intermediate gear 7 is greater than the number of teeth of the second driven gear 8, and the number of teeth of the first driven gear 4 is greater than the number of teeth of the second intermediate gear 7. This design is mainly due to the internal space of the handle 1 and the distance between each gear, in order to ensure better meshing between the teeth.

[0020] The handle 1 housing also houses a Hall gear sensor 10 for determining the infeed position of the inner tool tube. By replacing the chain with gear transmission and adding two intermediate gears in the middle position, namely the first intermediate gear 3 and the second intermediate gear 7, the torque and accuracy are improved. The Hall gear sensor 10 is used to determine the infeed position of the inner tool tube. When the second drive gear 6 rotates one tooth, it generates a pulse wave. By reading and counting the pulse waves using a chip, the infeed position of the inner tool tube can be accurately determined.

[0021] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A breast biopsy needle with high-precision infeed stroke, comprising a handle (1), an outer blade tube, and an inner blade tube, wherein the outer blade tube and the inner blade tube are mounted on the front end of the handle (1), and a blade transmission component is installed in the housing of the handle (1), the blade transmission component comprising a first transmission assembly and a second transmission assembly, the first transmission assembly comprising a first driving gear (2), a first driven gear (4), and a first motor transmission shaft (5), the second transmission assembly comprising a second driving gear (6), a second driven gear (8), and a second motor (9), characterized in that: The first transmission assembly further includes a first intermediate gear (3), which meshes with the first driving gear (2) and the first driven gear (4) respectively. The first motor transmission shaft (5) drives the first driving gear (2) to rotate under the power drive of the first motor. The first driving gear (2) transmits torque through the first intermediate gear (3) to drive the first driven gear (4) to control the rotation of the inner blade tube and the inner blade mounted on the inner blade tube. The second transmission assembly further includes a second intermediate gear (7), which meshes with the second driving gear (6) and the second driven gear (8) respectively. The second driving gear (6) rotates under the power drive of the second motor (9). The second driving gear (6) drives the second driven gear (8) through the second intermediate gear (7) to transmit torque to control the advance and retreat of the inner blade tube and the inner blade mounted on the inner blade tube. The handle (1) housing is also equipped with a Hall gear sensor (10) for determining the infeed position of the inner blade tube.

2. The high-precision breast biopsy needle with a high infeed stroke as described in claim 1, characterized in that: The first motor drive shaft (5) drives the first active gear (2) to rotate 360° in both directions under the power drive of the first motor.

3. The high-precision breast biopsy needle with a high infeed stroke as described in claim 1, characterized in that: The second drive gear (6) rotates 360° in both directions under the power drive of the second motor (9).

4. The high-precision breast biopsy needle with a high infeed stroke as described in claim 1, characterized in that: The diameter of the first driving gear (2) is greater than the diameter of the first intermediate gear (3), and the diameter of the first driven gear (4) is greater than the diameter of the first driving gear (2).

5. The high-precision breast biopsy needle with a high infeed stroke as described in claim 4, characterized in that: The diameter of the second driven gear (8) is greater than the diameter of the second driving gear (6), and the diameter of the second intermediate gear (7) is greater than the diameter of the second driven gear (8).

6. The high-precision breast biopsy needle with a high infeed stroke as described in claim 5, characterized in that: The diameter of the first driven gear (4) is greater than the diameter of the second intermediate gear (7).

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