Closed type rotary cutting needle calibration device

Abstract

A closed rotary-cut needle calibration device relates to the technical field of medical equipment and is characterized in that a driving handle is rotatably connected with an outer needle tube and an inner needle tube, the inner needle tube is positioned in the outer needle tube and rotatably connected with the outer needle tube, one ends of the outer needle tube and the inner needle tube, which are positioned in the driving handle, are respectively connected with a driving motor, and the outer needle tube is provided with a sampling cutter groove; the position of the inner needle tube corresponds to the position of the sampling cutter groove, a central identification point is arranged at one end, close to the mounting rack, of the outer needle tube, and a positioning mark is arranged in the middle of one end, close to the outer needle tube, of the mounting rack; according to the closed type rotary cutting needle calibrating device, the driving motor drives the outer needle tube to rotate, the notch of the sampling cutter groove in the outer needle tube faces the reference position in the middle over the outer needle tube, the position of the inner needle tube is determined through the vertex limiting mark and the original point limiting mark on the outer needle tube, and operation of workers is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a closed rotary cutting needle calibration device. Background Art

[0002] During the use of breast biopsy and excision systems, the self-inspection and positioning of the closed excision needle is a key technology that affects whether the product can be used normally. In the actual application of some closed excision needle products, the positions of the inner and outer needle tubes need to be calibrated. Each calibration requires multiple calibrations by the staff, which is time-consuming and labor-intensive, and it is difficult to calibrate successfully in one go. Utility Model Content

[0003] In order to overcome the shortcomings of the background technology, the utility model discloses a closed rotary cutting needle calibration device. The utility model drives the outer needle tube to rotate through a driving motor, so that the notch of the sampling knife groove on the outer needle tube faces the reference position in the middle above, and the position of the inner needle tube is determined by the vertex limit mark and the origin limit mark on the outer needle tube, which is convenient for the staff to operate.

[0004] In order to achieve the purpose of the utility model, the utility model adopts the following technical solutions:

[0005] A closed rotary cutting needle calibration device includes a driving handle with a mounting frame installed on the driving handle, an outer needle tube and an inner needle tube are rotatably connected to the driving handle respectively, and the inner needle tube is located inside the outer needle tube and is rotatably connected, one end of the outer needle tube and the inner needle tube located inside the driving handle are respectively connected to a driving motor, and a sampling knife groove is provided on the outer needle tube, and the position of the inner needle tube corresponds to the position of the sampling knife groove.

[0006] A center marking point is arranged on one end of the outer needle tube close to the mounting frame.

[0007] A positioning mark is provided at a middle position of the mounting frame close to one end of the outer needle tube.

[0008] The outer needle tube is provided with a vertex limit mark and an origin limit mark, respectively, and the vertex limit mark and the origin limit mark are respectively located on both sides of the sampling knife groove.

[0009] A spring is installed on one end of the inner needle tube connected to the driving motor, and one end of the spring is connected to the mounting end of the driving motor.

[0010] The position of the central axis of the outer needle tube coincides with the position of the central axis of the inner needle tube.

[0011] The blade head of the inner needle tube is located in the sampling blade groove of the outer needle tube.

[0012] The position of the central marking point on the outer needle tube corresponds to the position of the sampling knife groove on the outer needle tube and is located on the same side.

[0013] Due to the adoption of the above technical solution, the utility model has the following beneficial effects:

[0014] The utility model discloses a closed type rotary cutting needle calibration device, which drives the outer needle tube to rotate by a driving motor so that the notch of the sampling knife groove on the outer needle tube faces the reference position in the middle above, and determines the position of the inner needle tube by the vertex limit mark and the origin limit mark on the outer needle tube, so as to facilitate the operation of the staff. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0016] 1. Driving handle; 2. Center mark point; 3. Sampling knife groove; 4. Inner needle tube; 5. Vertex limit mark; 6. Origin limit mark; 7. Outer needle tube; 8. Mounting bracket. DETAILED DESCRIPTION

[0017] The present invention can be explained in detail through the following embodiments. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0018] Combined with Figure 1 The closed type rotary cutting needle calibration device comprises a driving handle 1, and a mounting frame 8 is installed on the driving handle 1, and an outer needle tube 7 and an inner needle tube 4 are rotatably connected to the driving handle 1 respectively, and the inner needle tube 4 is located in the outer needle tube 7 and is rotatably connected, and one end of the outer needle tube 7 and the inner needle tube 4 located in the driving handle 1 are respectively connected to the driving motor, and an encoding counter is installed in the driving handle 1, and the data of the driving motor is collected by the encoding counter, and a sampling knife groove 3 is provided on the outer needle tube 7, and the position of the inner needle tube 4 corresponds to the position of the sampling knife groove 3.

[0019] A center marking point 2 is provided on one end of the outer needle tube 7 close to the mounting frame 8 .

[0020] A positioning mark is provided at the middle position of the mounting frame 8 near one end of the outer needle tube 7. By coinciding the positioning mark on the mounting frame 8 with the center identification point 2 on the outer needle tube 7, it is convenient for the staff to confirm the direction of the notch of the sampling knife groove 3 on the outer needle tube 7.

[0021] The outer needle tube 7 is provided with a vertex limit mark 5 and an origin limit mark 6 , respectively, and the vertex limit mark 5 and the origin limit mark 6 are located at two sides of the sampling knife groove 3 .

[0022] A spring is installed on one end of the inner needle tube 4 connected to the driving motor, and one end of the spring is connected to the mounting end of the driving motor.

[0023] The position of the central axis of the outer needle tube 7 coincides with the position of the central axis of the inner needle tube 4 .

[0024] The blade head of the inner needle tube 4 is located in the sampling blade groove 3 of the outer needle tube 7 .

[0025] The position of the center marking point 2 on the outer needle tube 7 corresponds to the position of the sampling knife groove 3 on the outer needle tube 7 and is located on the same side. After the center marking point 2 coincides with the position on the positioning mark on the mounting frame 8, the notch of the sampling knife groove 3 on the outer needle tube 7 faces upward.

[0026] The closed rotary cutting needle calibration device is described. When in use, the feed drive motor is started to drive the inner needle tube 4 to move from the outer needle tube 7 to any axial position, and retreat to the origin limit mark 6 at a low speed (the PWM duty cycle is adjusted to 35%). When the inner needle tube 4 retreats, there is no running resistance, and the current running current of the feed motor is stable. When the inner needle tube 4 retreats to the position of the origin limit mark 6, the drive motor encounters resistance in operation. After passing the origin limit mark 6, as the spring on the inner needle tube 4 is compressed, the running resistance continues to increase, and the current of the drive motor is sampled by the encoder counter on the drive handle 1. , the sampling waveform will collect a slowly rising waveform. When the voltage waveform reaches the resistance threshold of the origin limit mark 6, the drive motor stops running, and the current position is recorded as the starting position. After the encoding counter is cleared, the drive motor is restarted, and the encoding count is started at the same time. The inner needle tube 4 is moved forward to the position of 1 / 2 of the sampling knife groove 3 length and stops feeding. The current encoding count is recorded, and the position of the inner needle tube 4 is calibrated. The outer needle tube 7 is driven to rotate by the drive motor on the outer needle tube 7, so that the center identification point 2 on the outer needle tube 7 is aligned with the positioning mark on the mounting frame 8, and the position of the outer needle tube 7 is located.

[0027] The parts of the present invention that are not described in detail are prior art. Although the present invention is specifically demonstrated and introduced in conjunction with the preferred implementation scheme, there are many methods and ways to implement the technical solution. The above is only a preferred implementation scheme of the present invention. However, technical personnel in the relevant field should understand that various changes can be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined in the attached claims, which are all within the scope of protection of the present invention.

Claims

1. A closed type rotary cutting needle calibration device, comprising a driving handle (1), wherein a mounting frame (8) is mounted on the driving handle (1), wherein: The driving handle (1) is rotatably connected to an outer needle tube (7) and an inner needle tube (4), and the inner needle tube (4) is located inside the outer needle tube (7) and is rotatably connected thereto; one end of the outer needle tube (7) and the inner needle tube (4) located inside the driving handle (1) are respectively connected to a driving motor, and a sampling knife groove (3) is provided on the outer needle tube (7), and the position of the inner needle tube (4) corresponds to the position of the sampling knife groove (3); A center marking point (2) is provided on one end of the outer needle tube (7) close to the mounting frame (8); A positioning mark is provided at a middle position of the mounting frame (8) close to one end of the outer needle tube (7).

2. The closed type rotary cutting needle calibration device according to claim 1, characterized in that: The outer needle tube (7) is provided with a vertex limit mark (5) and an origin limit mark (6), respectively, and the vertex limit mark (5) and the origin limit mark (6) are respectively located on both sides of the sampling knife groove (3).

3. The closed type rotary cutting needle calibration device according to claim 1, characterized in that: A spring is installed on one end of the inner needle tube (4) connected to the drive motor, and one end of the spring is connected to the mounting end of the drive motor.

4. The closed type rotary cutting needle calibration device according to claim 1, characterized in that: The position of the central axis of the outer needle tube (7) coincides with the position of the central axis of the inner needle tube (4).

5. The closed type rotary cutting needle calibration device according to claim 1, characterized in that: The blade head portion of the inner needle tube (4) is located within the sampling blade groove (3) of the outer needle tube (7).

6. The closed type rotary cutting needle calibration device according to claim 1, characterized in that: The position of the central marking point (2) on the outer needle tube (7) corresponds to the position of the sampling knife groove (3) on the outer needle tube (7), and are located on the same side.

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