Rotary cutting device

Abstract

The utility model relates to a rotary cutting device which comprises an outer shell, a rotary cutting assembly and a driving assembly. The driving assembly comprises a fixing base, a limiting pin, a rotating shaft pipe and a power source. The fixing base is fixedly arranged in the outer shell, one end of the rotating shaft pipe extends into the fixing base, a spiral guide groove is formed in the peripheral wall of the end, located in the fixing base, of the rotating shaft pipe, one end of the limiting pin is limited relative to the inner wall of the fixing base, the other end of the limiting pin is located in the spiral guide groove, and the rotating shaft pipe is driven by the power source to rotate; the rear end of the rotary cutter is fixedly connected with and penetrates through the interior of the rotary shaft pipe. The rotating shaft pipe is driven to rotate through the power source, the limiting pin drives the rotating shaft pipe to do linear motion in the fixing base at the same time under the guiding effect of the spiral guiding groove, the rotating shaft pipe can be driven to do rotating motion and linear motion at the same time only through one power source, then the rotary cutter is driven to complete rotating motion and linear motion, and therefore rotary cutting work is completed. The structure is simple and cost is low.

Description

Technical Field

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

[0002] Biopsy is the abbreviation of "live tissue examination". Clinically, the benign and malignant nature of various tumors are determined by biopsy. At present, there are two commonly used methods of biopsy, one is passive puncture biopsy and the other is active puncture biopsy. Due to the advantages of passive puncture biopsy, which is convenient and safe to operate, it is becoming more and more popular in the field of biological tissue sampling equipment.

[0003] It is known that there are various methods of puncture sampling to obtain biopsy samples. For example, the Chinese utility model patent with patent number CN202220699766.3 discloses "A tumor rotary biopsy motion structure", which includes an inner knife tube, a first drive mechanism and a second drive mechanism. The inner knife tube includes a cutter, a rack, an adapter and a second gear; the first drive mechanism includes a first rotary power source and a first bevel gear to achieve the linear reciprocating motion of the inner knife tube; the second drive mechanism includes a second rotary power source and a first gear to achieve the rotational motion of the inner knife tube; its structure is complex, and it adopts a dual-drive structure, which requires two power sources, and the production cost is relatively high. In addition, the dual-drive endurance of the biopsy device is relatively weak under the same specification power supply. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a rotary cutting device to overcome the deficiencies in the above-mentioned prior art.

[0005] The utility model solves the above technical problems with the following technical solutions: a rotary cutting device, comprising an outer shell, a rotary cutting assembly and a driving assembly; the rotary cutting assembly comprises a rotary cutting blade and a window tube, the rear end of the window tube is fixedly connected to the front end of the outer shell, and the rotary cutting blade is arranged inside the window tube;

[0006] The driving assembly includes a fixed seat, a limit pin, a rotating shaft tube and a power source; the fixed seat is fixedly arranged in the outer shell, one end of the rotating shaft tube extends into the fixed seat, a spiral guide groove is arranged on the peripheral wall of one end of the rotating shaft tube located in the fixed seat, one end of the limit pin is limitedly arranged relative to the inner wall of the fixed seat, the other end of the limit pin is located in the spiral guide groove, and the rotating shaft tube is driven to rotate by the power source; the rear end of the rotary cutter is fixedly connected and passes through the interior of the rotating shaft tube; the rear end of the rotary cutter is externally received by the collecting assembly and the negative pressure pump.

[0007] The beneficial effects of the utility model are as follows: the rotating shaft tube is driven to rotate by a power source, and the limit pin drives the rotating shaft tube to perform linear motion in the fixed seat at the same time under the guiding action of the spiral guide groove. Only one power source is required to drive the rotating shaft tube to perform rotational motion and linear motion at the same time, and then drive the rotary cutter to complete rotational motion and linear motion, thereby completing the rotary cutting work, with a simple structure and low cost.

[0008] On the basis of the above technical solution, the present invention can also be improved as follows.

[0009] Furthermore, the driving assembly also includes a limit sleeve and a spring; the limit sleeve moves linearly in the fixed seat, one end of the rotating shaft tube located in the spiral guide groove extends into the limit sleeve, and the other end of the limit pin penetrates the inner wall of the limit sleeve and extends into the spiral guide groove; retaining rings are respectively fixed at both ends of the fixed seat, and springs are provided between the two ends of the limit sleeve and the retaining rings.

[0010] Furthermore, a limiting groove is arranged inside the fixing seat along its length direction, and one end of the limiting pin is slidably arranged in the limiting groove.

[0011] Furthermore, a collection box is provided at the rear of the outer shell, the rear end of the rotary cutter is connected to the collection box, and the collection box is externally connected to a negative pressure pump.

[0012] Furthermore, the outer shell includes an upper shell and a lower shell that are detachably connected.

[0013] Furthermore, the power source includes a driving gear and a driving motor, and the driving assembly also includes a driven gear; the driven gear is sleeved on the end of the rotating shaft tube away from the fixed seat; the driving motor is arranged in the outer shell, and the rotating shaft of the driving motor is connected to the driving gear, and the driving gear is meshed with the driven gear. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 This is a schematic diagram of the structure of the drive assembly of the utility model;

[0016] Figure 3 This is a schematic diagram of the structure of the matching of the rotating shaft sleeve and the driven gear of the utility model;

[0017] Figure 4 It is a schematic diagram of the structure of the matching of the limiting sleeve and the limiting pin of the utility model.

[0018] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0019] 1. Outer shell; 2. Peeling assembly; 21. Peeling knife; 22. Window tube; 3. Driving assembly; 31. Fixed seat; 311. Limiting groove; 32. Limiting pin; 33. Rotating shaft tube; 331. Spiral guide groove; 34. Limiting sleeve; 35. Spring; 36. Retaining ring; 37. Driven gear; 4. Collection box. DETAILED DESCRIPTION

[0020] The principles and features of the present invention are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present invention and are not used to limit the scope of the present invention.

[0021] like Figure 1 to Figure 4 As shown, in embodiment 1, a rotary cutting device comprises an outer shell 1, a rotary cutting assembly 2 and a driving assembly 3; the rotary cutting assembly 2 comprises a rotary cutting blade 21 and a window tube 22, the rear end of the window tube 22 is fixedly connected to the front end of the outer shell 1, and the rotary cutting blade 21 is arranged inside the window tube 22;

[0022] The driving assembly 3 includes a fixed seat 31, a limit pin 32, a rotating shaft tube 33 and a power source; the fixed seat 31 is fixedly arranged in the outer shell 1, one end of the rotating shaft tube 33 extends into the fixed seat 31, and a spiral guide groove 331 is arranged on the peripheral wall of one end of the rotating shaft tube 33 located in the fixed seat 31, one end of the limit pin 32 is limitedly arranged relative to the inner wall of the fixed seat 31, and the other end of the limit pin 32 is located in the spiral guide groove 331, and the rotating shaft tube 33 is driven to rotate by the power source; the rear end of the rotary cutter 21 is fixedly connected and passes through the interior of the rotating shaft tube 33; the rear end of the rotary cutter 21 receives the collecting assembly and the negative pressure pump outside.

[0023] The rotating shaft tube 33 is driven to rotate by a power source, and the limiting pin 32 drives the rotating shaft tube 33 to perform linear motion in the fixed seat 31 under the guidance of the spiral guide groove 331. Only one power source is needed to drive the rotating shaft tube 33 to perform rotational motion and linear motion at the same time, thereby driving the rotary cutter 21 to complete rotational motion and linear motion, thereby completing the rotary cutting work, with a simple structure and low cost.

[0024] In a specific implementation, a spike portion is provided at the front end of the window tube 22 to facilitate piercing of the pathological tissue. An opening is provided on the front end side wall of the window tube 22, and a cutting edge is provided at the front end of the rotary cutter 21. During the suction process of the negative pressure pump, the pathological tissue is sucked into the window tube 22 from the opening. At this time, the driving component 3 is driven by the power source to perform rotational motion and linear motion at the same time, and the pathological tissue sucked into the window tube 22 is rotary cut by the cutting edge at the front end of the rotary cutter 21. After rotary cutting, the cut pathological tissue is further sucked out by the negative pressure pump, thereby completing the rotary cutting operation.

[0025] Embodiment 2: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0026] The driving assembly 3 also includes a limit sleeve 34 and a spring 35; the limit sleeve 34 moves linearly in the fixed seat 31, one end of the rotating shaft tube 33 located in the spiral guide groove 331 extends into the limit sleeve 34, and the other end of the limit pin 32 penetrates the inner wall of the limit sleeve 34 and extends into the spiral guide groove 331; retaining rings 36 are fixedly provided at both ends of the fixed seat 31, and springs 35 are provided between both ends of the limit sleeve 34 and the retaining ring 36. When the pathological tissue is relatively dense, the movement speed of the limit pin 32 in the spiral guide groove 331 does not match the speed of the rotary cutter 21, which will cause the rotating sleeve to be unable to rotate, while the power source is continuously outputting, thereby causing the risk of instantaneous overload of the power source; by providing a limit sleeve 34 that can move linearly in the fixed seat 31, when encountering a relatively dense pathological tissue, the linear movement of the limit sleeve 34 to the rear end offsets the force of the rotating sleeve pushing forward, thereby avoiding the risk of instantaneous overload of the power source; the limit sleeve 34 that can move linearly in the fixed seat 31 is specifically achieved by providing springs 35 at both ends of the limit sleeve 34, and the rotary cutter 21 can play a buffering role in axial movement through the spring, thereby avoiding the risk of instantaneous overload of the motor.

[0027] Embodiment 3, this embodiment is a further improvement on the basis of embodiment 2, and its details are as follows:

[0028] A limiting groove 311 is provided inside the fixing seat 31 along its length direction, and one end of the limiting pin 32 is slidably disposed in the limiting groove 311. The limiting pin 32 is prevented from rotating, that is, the limiting pin 32 is angularly limited relative to the inner wall of the fixing seat 31, thereby preventing the rotating shaft tube 33 from driving the limiting sleeve 34 and the limiting pin 32 to rotate simultaneously during the rotation process, thereby avoiding the hidden danger of failing to drive the rotary cutter 21 to move forward for rotary cutting.

[0029] Embodiment 4: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0030] The rear part of the outer shell 1 is provided with a collection box 4, the rear end of the rotary cutter 21 is connected to the collection box 4, and the collection box 4 is externally connected to a negative pressure pump. The pathological tissue removed by rotary cutting can be collected without an external receiving container. In a specific implementation, the rotary cutting device is disposable, and the collection box 4 is also disposable, avoiding the risk of cross infection caused by unclean cleaning.

[0031] Embodiment 5, this embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0032] The outer shell 1 comprises an upper shell and a lower shell which are detachably connected to facilitate production, processing and assembly.

[0033] Embodiment 6: This embodiment is a further improvement on the basis of embodiment 1, and its details are as follows:

[0034] The power source includes a driving gear and a driving motor, and the driving assembly 3 also includes a driven gear 37; the driven gear 37 is sleeved on the end of the rotating shaft tube 33 away from the fixed seat 31; the outer shell 1 is provided with a driving motor, and the rotating shaft of the driving motor is connected with the driving gear, and the driving gear is meshed with the driven gear 37. It can be realized by the existing driving motor and driving gear structure, which is simple in structure and reduces the cost.

[0035] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations of the present invention. Ordinary technicians in the field can change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A rotary cutting device, characterized in that: The invention comprises an outer shell (1), a rotary cutting assembly (2) and a driving assembly (3); the rotary cutting assembly (2) comprises a rotary cutting blade (21) and a window tube (22); the rear end of the window tube (22) is fixedly connected to the front end of the outer shell (1), and the rotary cutting blade (21) is arranged inside the window tube (22); The driving assembly (3) comprises a fixed seat (31), a limit pin (32), a rotating shaft tube (33) and a power source; the fixed seat (31) is fixedly arranged in the outer shell (1); one end of the rotating shaft tube (33) extends into the fixed seat (31); a spiral guide groove (331) is arranged on the peripheral wall of one end of the rotating shaft tube (33) located in the fixed seat (31); one end of the limit pin (32) is limitedly arranged relative to the inner wall of the fixed seat (31); the other end of the limit pin (32) is located in the spiral guide groove (331); the rotating shaft tube (33) is driven to rotate by the power source; the rear end of the rotary cutter (21) is fixedly connected to and passes through the interior of the rotating shaft tube (33); the rear end of the rotary cutter (21) receives the collection assembly and the negative pressure pump.

2. A rotary cutting device according to claim 1, characterized in that: The driving assembly (3) further comprises a limiting sleeve (34) and a spring (35); the limiting sleeve (34) moves linearly in the fixed seat (31); one end of the rotating shaft tube (33) located in the spiral guide groove (331) extends into the limiting sleeve (34); the other end of the limiting pin (32) penetrates through the inner wall of the limiting sleeve (34) and extends into the spiral guide groove (331); retaining rings (36) are respectively fixedly provided at both ends of the fixed seat (31); and the springs (35) are provided between both ends of the limiting sleeve (34) and the retaining rings (36).

3. A rotary cutting device according to claim 2, characterized in that: A limiting groove (311) is arranged inside the fixing seat (31) along its length direction, and one end of the limiting pin (32) is slidably arranged in the limiting groove (311).

4. The rotary cutting device according to claim 1, characterized in that: A collection box (4) is provided at the rear of the outer shell (1); the rear end of the rotary cutter (21) is connected to the collection box (4); and the collection box (4) is externally connected to a negative pressure pump.

5. The rotary cutting device according to claim 1, characterized in that: The outer shell (1) comprises an upper shell and a lower shell which are detachably connected.

6. The rotary cutting device according to claim 1, characterized in that: The power source comprises a driving gear and a driving motor, and the driving assembly (3) further comprises a driven gear (37); the driven gear (37) is sleeved on an end of the rotating shaft tube (33) away from the fixing seat (31); the driving motor is arranged in the outer shell (1), the rotating shaft of the driving motor is connected to the driving gear, and the driving gear is meshed with the driven gear (37).

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