Breast rotary cutting biopsy needle with high-precision swing cutter angle

Abstract

The utility model discloses a breast rotary cutting biopsy needle with high precision of swinging knife angle, which comprises a handle, an outer knife tube and an inner knife tube, the outer knife tube and the inner knife tube are arranged at the front end of the handle, a knife body transmission component is arranged in a shell of the handle, and the knife body transmission component comprises a first transmission component, a second transmission component and a third transmission component; the second driving gear is in meshing transmission with the second driven gear under the power driving action of the second motor so as to control the inner cutter tube and the inner cutter mounted on the inner cutter tube to swing; a Hall gear sensor used for sensing the rotation angle of each tooth on the second driving gear is further installed in the shell of the handle. According to the breast rotary cutting biopsy needle with the high precision of the swinging cutter angle, the Hall gear sensor is additionally arranged on the edge of the gear responsible for swinging cutting in the handle, the rotation angle of each tooth on the gear can be sensed, then the center position of the cutter when the cutter stops can be well positioned, and the precision of the swinging angle of the cutter is improved.

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 in scalpel angle. Background Technology

[0002] Breast biopsy needles are a diagnostic technique used under ultrasound guidance to obtain a biopsy sample from a breast lump. The needle relies on a gear in the handle to drive the blade on the needle to rotate and move forward and backward. Currently, some biopsy needles on the market use a handle-driven method where the inner blade moves at a fixed angle. This rotation angle is not precise enough, making it difficult to accurately position the blade at the center point. If the center point is significantly off after the handle has reached the top, a notch may remain on the left or right side of the inner blade after the biopsy is completed. If the tissue is not completely severed during the procedure, moving the biopsy needle can cause pulling damage to the tissue, potentially leading to medical accidents. 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 swivel angle in order to overcome the shortcomings of the existing technology.

[0004] The technical solution adopted in this utility model is: a breast biopsy needle with high-precision swing angle, including 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, a second transmission assembly, and a third transmission assembly. The first transmission assembly includes a first driving gear, a first driven gear, and a first motor. The first driving gear meshes with the first driven gear under the power drive of the first motor to control the rotation of the outer blade tube and the outer blade mounted on the outer blade tube. The second transmission assembly... The first component includes a second driving gear, a second driven gear, and a second motor. The second driving gear meshes with the second driven gear under the power drive of the second motor to control the oscillation of the inner cutter tube and the inner cutter mounted on the inner cutter tube. The second transmission component includes a third driving gear, a third driven gear, and a third motor. The third driving gear meshes with the third driven gear under the power drive of the third motor to control the forward and backward movement of the inner cutter tube and the inner cutter mounted on the inner cutter tube. A Hall effect gear sensor for sensing the rotation angle of each tooth on the second driving gear is also installed in the housing of the handle.

[0005] To be further specific, the first drive gear achieves 360° forward and reverse rotation under the power drive of the first motor.

[0006] To be further specific, the second drive gear rotates 180° in both directions under the power drive of the second motor.

[0007] To be further specific, the third driving gear achieves 360° forward and reverse rotation under the power drive of the third motor.

[0008] More specifically, a fixed shaft is also installed in the housing of the handle, and the first driven gear, the second driven gear and the third driven gear are coaxially mounted on the fixed shaft.

[0009] To be further specific, the second driven gear and the third driven gear are of the same specifications.

[0010] Compared with the prior art, the present invention has the following advantages: The breast biopsy needle with high precision swing angle of the present invention adds a Hall gear sensor to the side of the gear responsible for swing cutting inside the handle, which can sense the rotation angle of each tooth on the gear, thereby accurately locating the center position when the tool stops and improving the accuracy of the tool swing angle. 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 internal structure of the breast biopsy needle of this utility model;

[0013] Figure 3 This is a schematic diagram of the blade transmission component. Figure 1 ;

[0014] Figure 4 This is a schematic diagram of the blade transmission component. Figure 2 ;

[0015] Figure 5 This is a schematic diagram of the blade transmission component. Figure 3 ;

[0016] Figure 6 This is a schematic diagram of the blade transmission component. Figure 4 ;

[0017] Figure 7 This is a schematic diagram of the blade transmission component. Figure 5 .

[0018] The following are the labels in the diagram: 1. Handle; 2. First driving gear; 3. First driven gear; 4. First motor; 5. Second driving gear; 6. Second driven gear; 7. Second motor; 8. Third driving gear; 9. Third driven gear; 10. Third motor; 11. Hall effect gear sensor; 12. Fixed shaft. Detailed Implementation

[0019] 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.

[0020] See Figures 1-7 The present invention relates to a high-precision breast biopsy needle with a swing blade angle, 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. The blade transmission component includes a first transmission assembly, a second transmission assembly, and a third transmission assembly.

[0021] The first transmission assembly includes a first driving gear 2, a first driven gear 3, and a first motor 4. The first driving gear 2, driven by the first motor 4, meshes with the first driven gear 3 to control the rotation of the outer tool tube and the outer tool mounted on it. The first driving gear 2 achieves 360° forward and reverse rotation under the power of the first motor 4, thereby enabling the outer tool tube and the outer tool to rotate 360° in both directions. The first motor 4 is a DC brushed motor.

[0022] The second transmission assembly includes a second driving gear 5, a second driven gear 6, and a second motor 7. The second driving gear 5, driven by the second motor 7, meshes with the second driven gear 6 to control the oscillation of the inner cutter tube and the inner cutter mounted on it. The second driving gear 5 rotates 180° in both directions under the power of the second motor 7, thus enabling the inner cutter tube and the inner cutter to oscillate 180° in both directions. The second motor 7 is a DC brushed motor.

[0023] The third transmission assembly includes a third driving gear 8, a third driven gear 9, and a third motor 10. The third driving gear 8, driven by the third motor 10, meshes with the third driven gear 9 to control the forward and backward movement of the inner tool tube and the inner tool mounted on it. The third driving gear 8 rotates 360° in both directions under the power of the third motor 10, thus enabling the forward and backward movement of the inner tool tube and the inner tool. The third motor 10 is a DC brushed motor.

[0024] A fixed shaft 12 is also installed in the housing of the handle 1. The first driven gear 3, the second driven gear 6, and the third driven gear 9 are coaxially mounted on the fixed shaft 12. This design is because the three driven gears, the first driven gear 3, the second driven gear 6, and the third driven gear 9, need to correspond one-to-one with the first driving gear 2, the second driving gear 5, and the third driving gear 8. Specifically, the first driven gear 3, the third driven gear 9, and the second driven gear 6 are mounted on the fixed shaft 12 in sequence from front to back.

[0025] The second driven gear 6 and the third driven gear 9 have the same specifications. That is, the diameter of the second driven gear 6 is the same as that of the third driven gear 9, and the number of teeth of the second driven gear 6 is the same as that of the third driven gear 9. Mass production of gears of the same specification can reduce production costs. Gears of the same specification can share maintenance spare parts, reducing inventory and management costs. Gears of the same specification can be repaired and maintained more easily.

[0026] Preferably, the diameter of the first driving gear 2 is slightly larger than the diameter of the third driving gear 8, the diameter of the first driven gear 3 is larger than the diameter of the first driving gear 2, the diameter of the second driving gear 5 is larger than the diameter of the first driven gear 3, and the diameter of the second driven gear 6 is slightly larger than the diameter of the second driving gear 5. The first driving gear 2 has more teeth than the third driving gear 8, the second driving gear 5 has more teeth than the first driving gear 2, the number of teeth of the second driving gear 5 is the same as that of the second driven gear 6, and the first driven gear 3 has more teeth than the second driving gear 5. This design is mainly due to the internal space of the handle 1 and the distance between the gears, in order to ensure better meshing between the teeth.

[0027] The handle 1 housing also contains a Hall gear sensor 11 for sensing the rotation angle of each tooth on the second drive gear 5. By adding a Hall gear sensor 11 to the side of the second drive gear 5, which is responsible for oscillating cutting, inside the handle 1, the rotation angle of each tooth on the second drive gear 5 can be sensed, thereby accurately locating the center position of the tool when it stops and improving the accuracy of the tool oscillation angle.

[0028] 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 swing angle, 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), characterized in that: The blade transmission component includes a first transmission assembly, a second transmission assembly, and a third transmission assembly; The first transmission assembly includes a first driving gear (2), a first driven gear (3) and a first motor (4). The first driving gear (2) meshes with the first driven gear (3) under the power drive of the first motor (4) to control the rotation of the outer blade tube and the outer tool mounted on the outer blade tube. The second transmission assembly includes a second driving gear (5), a second driven gear (6), and a second motor (7). The second driving gear (5) meshes with the second driven gear (6) under the power drive of the second motor (7) to control the swing of the inner tube and the inner cutter mounted on the inner tube. The third transmission assembly includes a third driving gear (8), a third driven gear (9), and a third motor (10). The third driving gear (8) meshes with the third driven gear (9) under the power drive of the third motor (10) 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 (11) for sensing the rotation angle of each tooth on the second drive gear (5).

2. The breast biopsy needle with high-precision oscillating blade angle according to claim 1, characterized in that: The first drive gear (2) rotates 360° in both directions under the power drive of the first motor (4).

3. The breast biopsy needle with high-precision swing blade angle according to claim 1, characterized in that: The second drive gear (5) rotates 180° in both directions under the power drive of the second motor (7).

4. The breast biopsy needle with high-precision swing blade angle according to claim 1, characterized in that: The third drive gear (8) rotates 360° in both directions under the power drive of the third motor (10).

5. The breast biopsy needle with high-precision swing blade angle according to claim 1, characterized in that: A fixed shaft (12) is also installed in the housing of the handle (1), and the first driven gear (3), the second driven gear (6) and the third driven gear (9) are coaxially mounted on the fixed shaft (12).

6. The breast biopsy needle with high-precision oscillating blade angle according to claim 1, characterized in that: The second driven gear (6) and the third driven gear (9) have the same specifications.

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