A fully automatic biopsy needle suitable for delicate operation

Abstract

The present invention relates to the field of biopsy needles, and specifically to a fully automatic biopsy needle suitable for refined operation, comprising an inner needle fixing block, a middle needle tube fixing block, an outer needle tube fixing block, a depth limiting slider, and a rotating assembly. The present invention can achieve the cooperation between the depth rotating knob and the limiting block, so that the outer needle tube fixing block, the middle needle tube fixing block, and the depth limiting slider of the biopsy needle are all in a locked state, and the sampling depth of the outer needle tube and the middle needle tube is adjusted at the same time, so that the depth setting and unlocking are combined into one step and performed synchronously, so as to facilitate the operation of the staff.

Description

Technical Field

[0001] The present invention relates to the technical field of biopsy needles, and in particular to a fully automatic biopsy needle suitable for refined operation. Background Art

[0002] The biopsy needle is a medical device used for sampling and aspirating cells from cone tumors and unknown tumors in various organs such as kidney, liver, lung, breast, thyroid, prostate, pancreas, testicle, uterus, ovary, body surface, etc. Since the biopsy needle needs to puncture the skin, the outer needle is ejected to a certain length to intercept the lesion.

[0003] When using some biopsy needles, the staff needs to hold the biopsy needle to load the bolt first, then push the bolt back to reset it, then set the sampling needle to the depth of the specimen, and finally unlock the biopsy needle to take a sample. In other words, the biopsy needle needs to go through four steps to take a sample, which makes the operation steps of the biopsy needle cumbersome and easily reduces the user's operating efficiency. Summary of the invention

[0004] In view of the above situation, in order to overcome the defects of the prior art, the present invention provides a fully automatic biopsy needle suitable for refined operation to solve the problem that the above biopsy needle operation has many steps and reduces the user's operating efficiency.

[0005] In order to achieve the above object, the technical solution adopted by the present invention is:

[0006] A fully automatic biopsy needle suitable for refined operation comprises: a handle, the handle is composed of a left shell and a right shell, one side of the handle is provided with a hollow circular convex part, a bolt and a pressing part, the side of the hollow circular convex part away from the handle is provided with a gun head, the hollow circular convex part is provided with a depth rotating knob, the depth rotating knob is provided with a limit block, the interior of the handle is provided with an inner needle fixing block, a middle needle tube fixing block, an outer needle tube fixing block and a depth limiting sliding block, the interior of the inner needle fixing block is provided with an inner needle, the end of the inner needle away from the inner needle fixing block is in the shape of a spike, the interior of the middle needle tube fixing block is provided with a middle needle tube, the end of the middle needle tube away from the inner needle fixing block is in the shape of a three-diameter spike, the outer surface of the middle needle tube is provided with a cutting opening, the inner wall of the outer needle tube fixing block is rotatably connected with the outer needle tube, the end of the outer needle tube away from the inner needle fixing block has a cutting portion, and the cutting portion is bent, and the inner concave part of the cutting portion faces the inner needle, the outer wall of the larger diameter end of the hollow circular convex part is rotatably connected with the depth rotating knob, the inner wall of the depth rotating knob is fixed with a limit block, and the limit block is stepped;

[0007] A rotating assembly is arranged inside the handle and is used to rotate the middle needle tube and the outer needle tube, so that the middle needle tube cuts the specimen in a rotating shape;

[0008] The handle is also provided with a rotating assembly inside, which includes a connecting circular plate arranged at the recessed position of the right shell seam, a circular hole being provided on the right shell, a driving column being slidably connected inside the circular hole, an end of the driving column extending away from the connecting circular plate to the inside of the handle, and the other end of the driving column being fixed to a side wall of the connecting circular plate, a return spring being fixed between the connecting circular plate and the right shell, a first sliding opening being provided on one side of the depth limiting slider, a second sliding opening being provided on one side of the middle needle tube fixing block, and the driving column being slidably connected to the inside of the first sliding opening and the second sliding opening, a spiral groove being provided on the outer wall of one end of the middle needle tube close to the inner needle fixing block, and the driving column being located inside the spiral groove;

[0009] A limiting square block is fixed on the outer surface of the middle needle tube, a limiting square groove is arranged on the outer wall of one end of the outer needle tube close to the inner needle fixing block, and the limiting square block is located inside the limiting square groove.

[0010] Preferably, an opening group is provided on the outside of the handle, and the opening group includes a first opening and a second opening, and the first opening is provided on the left shell, and the second opening is provided on the right shell, the first opening and the second opening are communicated with each other, a bolt is slidably connected inside the opening group, a side of the bolt away from the gun head has a first U-shaped cavity and a second U-shaped cavity, and the second U-shaped cavity is located below the first U-shaped cavity, and the second U-shaped cavity is close to the depth of the handle, and a push block is fixed to the side of the bolt close to the gun head.

[0011] Preferably, the inner needle fixing block has an end on the side facing the opening group, an inner column is fixed to one side of the end of the inner needle fixing block, an auxiliary spring is arranged outside the inner column, and the auxiliary spring and the inner needle are both located inside the second U-shaped cavity.

[0012] Preferably, a main spring is fixed between the side of the outer needle tube fixing block facing the inner needle fixing block and the inner needle fixing block.

[0013] Preferably, the outer needle tube fixing block has a convex opening, a convex cavity and a connecting opening, and the convex opening, the convex cavity and the connecting opening are all connected, and the connecting opening is close to the gun head, and the convex opening is close to the inner needle fixing block, and the convex cavity is located between the convex opening and the connecting opening.

[0014] Preferably, the outer needle tube fixing block has a raised portion at the top end facing the gun head, the raised portion is flat on the side facing the gun head, the inclined surface of the raised portion faces the inclined surface of the pressing piece, a limiting protrusion is fixed to the inner wall of the left shell, the plane of the limiting protrusion faces the plane of the raised portion, and the plane of the raised portion contacts the plane of the limiting protrusion.

[0015] Preferably, an elastic buckle is provided on one side of the middle needle tube fixing block facing the outer needle tube fixing block, and the elastic buckle consists of a bent portion and a cylinder, and the cylinder is fixed to the top end of the bent portion.

[0016] Preferably, a limiting groove group is provided on the outer wall of the outer needle tube fixing block on one side facing the bolt, and the limiting groove group consists of two limiting linkage grooves, and the bending portion is located inside the limiting groove close to the step surface of the outer needle tube fixing block, and the slope surface of the bending portion faces the slope surface of the limiting groove, and the slope surface of the limiting groove faces the slope surface of the bending portion.

[0017] The beneficial effects of the present invention are:

[0018] 1. The bolt, inner needle fixing block, inner needle, inner column, auxiliary spring, outer needle tube fixing block, outer needle tube, main spring, pressing piece, middle needle tube fixing block, middle needle tube, depth rotating knob, limit block and depth limiting slider arranged inside the handle. Through the cooperation between the depth rotating knob and the limit block, the outer needle tube fixing block, middle needle tube fixing block and depth limiting slider of the biopsy needle can be locked, and the sampling depth of the outer needle tube and the middle needle tube can be adjusted at the same time, so that the depth setting and unlocking are combined into one step and carried out simultaneously, which is convenient for the staff to operate.

[0019] 2. By setting up a rotating assembly, the rotating assembly includes a driving column, a connecting circular plate, a first sliding mouth, a second sliding mouth, a spiral groove, a limiting square block and a limiting square groove, which can enable the middle needle tube to perform rotational cutting during sampling, thereby improving the efficiency of the middle needle tube cutting.

[0020] 3. The present invention has a compact structure, is more compact as a whole, and has a rounded appearance, which improves the user's comfort when sampling and is suitable for fine finger-pinching operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the present invention.

[0022] Figure 2 It is a schematic structural diagram of the handle of the present invention.

[0023] Figure 3 It is a schematic diagram of the first three-dimensional cross-sectional structure of the handle of the present invention.

[0024] Figure 4 For the present invention Figure 3 Schematic diagram of the structure enlarged at point A in the middle.

[0025] Figure 5 It is a schematic diagram of the structure of the bolt of the present invention.

[0026] Figure 6 It is a schematic structural diagram of the hollow circular convex part of the present invention.

[0027] Figure 7 For the present invention Figure 6 Schematic diagram of the enlarged structure at point B.

[0028] Figure 8It is a schematic structural diagram of the pressing member of the present invention.

[0029] Fig. 9 It is a structural schematic diagram of the outer needle tube fixing block of the present invention.

[0030] Fig.10 It is a structural schematic diagram of the middle needle tube fixing block of the present invention.

[0031] Fig.11 It is a schematic structural diagram of the depth limiting sliding block of the present invention.

[0032] Fig.12 It is a structural schematic diagram of the first sliding opening of the present invention.

[0033] Fig.13 It is a schematic diagram of the structure of the spiral groove of the present invention.

[0034] In the figure: 10, handle; 101, left shell; 102, right shell; 11, gun head; 12, opening group; 13, bolt; 14, inner needle fixing block; 15, inner needle; 16, inner column; 17, auxiliary spring; 18, outer needle tube fixing block; 19, outer needle tube; 110, main spring; 111, pressing piece; 112, middle needle tube fixing block; 113, middle needle tube; 114, depth rotating knob; 115, hollow circular protrusion; 116, depth limit slider; 117, elastic buckle; 118, limit slot group; 120, limit block;

[0035] 30. Rotating assembly; 31. Driving column; 32. Connecting circular plate; 33. Return spring; 34. First sliding opening; 35. Second sliding opening; 36. Spiral groove; 37. Position-limiting square block; 38. Position-limiting square groove. DETAILED DESCRIPTION

[0036] The following will refer to the attached Figures 1 to 13 The embodiments of the present invention are described in detail. It should be understood by those skilled in the art that these embodiments are only used to explain the technical principles of the present invention and are not intended to limit the protection scope of the present invention.

[0037] A fully automatic biopsy needle suitable for delicate operation, as shown in the attached Figure 1-Figure 13 As shown, including:

[0038] The handle 10 is composed of a left shell 101 and a right shell 102. A gun head 11 is arranged on one side of the handle 10, and the gun head 11 is trumpet-shaped. The handle 10 has a hollow circular protrusion 115 on the side facing the gun head 11, and the hollow circular protrusion 115 is composed of a left semicircular protrusion and a right semicircular protrusion, and one side of the left semicircular protrusion is fixed on a side wall of the left shell 101, and one side of the right semicircular protrusion is fixed on a side wall of the right shell 102, and the left semicircular protrusion and the right semicircular protrusion are symmetrical with the axis of the hollow circular protrusion 115 as the center ... left semicircular protrusion and the right semicircular protrusion. The convex block combination is in a circle, the side of the hollow circular convex part 115 with a larger diameter faces the handle 10, and the side of the hollow circular convex part 115 with a smaller diameter faces the gun head 11, the inner wall of the gun head 11 is provided with an inner screw groove, the outer wall of the end with a smaller diameter of the hollow circular convex part 115 is provided with an outer thread, and the gun head 11 is threadedly connected with the outer thread of the hollow circular convex part 115 through the inner screw groove, a cylinder is installed on the side of the gun head 11 away from the handle 10, an opening is opened on the left shell 101, and a pressing piece 111 is slidably connected to the inside of the opening, and the bottom of the pressing piece 111 facing the gun head 11 has an inclined surface.

[0039] refer to Figure 3 , Figure 5 and Fig.10 As shown, an opening group 12 is provided on the outside of the handle 10, and the opening group 12 includes a first opening and a second opening, and the first opening is provided on the left shell 101, and the second opening is provided on the right shell 102, the first opening and the second opening are connected, and a bolt 13 is slidably connected inside the opening group 12, and a side of the bolt 13 away from the gun head 11 has a first U-shaped cavity and a second U-shaped cavity, and the second U-shaped cavity is located below the first U-shaped cavity, and the second U-shaped cavity is close to the depth of the handle 10, and a push block is fixed on the side of the bolt 13 close to the gun head 11, and the width of the first U-shaped cavity is smaller than the width of the second U-shaped cavity.

[0040] refer to Figure 3 , Figure 5 and Fig. 9 As shown, an inner needle fixing block 14 is installed on the inner wall of the handle 10, and the inner needle fixing block 14 has an inner cavity. An inner needle 15 is fixed on the inner cavity wall of the inner needle fixing block 14, and the end of the inner needle 15 away from the inner needle fixing block 14 is in a spike shape, and the end of the inner needle 15 away from the inner needle fixing block 14 is located inside the cylinder, and the inner needle fixing block 14 has an end on the side facing the opening group 12, and an inner column 16 is fixed on one side of the end of the inner needle fixing block 14, and a secondary spring 17 is arranged outside the inner column 16, and the secondary spring 17 and the inner needle 15 are both located inside the second U-shaped cavity.

[0041] refer to Figure 3 , Figure 6 and Fig.10As shown, the inner wall of the handle 10 is slidably connected with an outer needle tube fixing block 18, and a main spring 110 is fixed between the outer needle tube fixing block 18 and the inner needle fixing block 14 on one side thereof, for supporting the outer needle tube fixing block 18, so as to facilitate the outer needle tube fixing block 18 to be reset, and the outer needle tube fixing block 18 has a convex opening, a convex cavity and a connecting opening, and the convex opening, the convex cavity and the connecting opening are all connected, and the connecting opening is close to the gun head 11, and the convex opening is close to the inner needle fixing block 14, and the convex cavity is located between the convex opening and the connecting opening, and the inner needle 15 An outer needle tube 19 is provided on the outside, and an end of the outer needle tube 19 away from the inner needle fixing block 14 has a cutting portion, and the cutting portion is bent, and the concave part of the cutting portion faces the inner needle 15, and the minimum diameter value of the outer needle tube 19 is greater than the maximum diameter value of the inner needle 15, and there is a gap between the inner wall of the outer needle tube 19 and the outer wall of the inner needle 15, and the end of the outer needle tube 19 away from the inner needle fixing block 14 passes through the convex mouth, the convex cavity, the connecting port, the hollow circular convex part 115 and the gun head 11 to the inside of the cylinder, which is used to cut the specimen, thereby facilitating the removal of the specimen from the human body.

[0042] refer to Figure 8 , Fig.10 and Fig.11 As shown, the outer needle tube fixing block 18 has a raised portion at the top end facing the gun head 11, the raised portion is flat on the side facing the gun head 11, the inclined surface of the raised portion faces the inclined surface of the pressing piece 111, a limiting protrusion is fixed to the inner wall of the left shell 101, and the plane of the limiting protrusion faces the plane of the raised portion, and the plane of the raised portion is in contact with the plane of the limiting protrusion.

[0043] refer to Figure 6 , Figure 7 and Fig.10 As shown, the inner part of the convex opening is slidably connected with a middle needle tube fixing block 112, and the inner wall of the middle needle tube fixing block 112 is rotatably connected with a middle needle tube 113, and the end of the middle needle tube 113 away from the inner needle fixing block 14 is in a three-pointed spike shape, and the outer surface of the middle needle tube 113 is provided with a cutting opening, and the middle needle tube 113 is located between the inner wall of the outer needle tube 19 and the outer wall of the inner needle 15, and the minimum diameter value of the middle needle tube 113 is greater than the maximum diameter value of the inner needle 15, and the maximum diameter value of the middle needle tube 113 is less than the minimum diameter value of the outer needle tube 19, An elastic buckle 117 is provided on the side of the middle needle tube fixing block 112 facing the outer needle tube fixing block 18. The elastic buckle 117 consists of a bent portion and a cylinder. The cylinder is fixed to the top of the bent portion. A limiting groove group 118 is provided on the outer wall of the side of the outer needle tube fixing block 18 facing the bolt 13. The limiting groove group 118 consists of two limiting linkage grooves. The bent portion is located inside the limiting groove close to the step surface of the outer needle tube fixing block 18, and the slope surface of the bent portion faces the slope surface of the limiting groove, and the slope surface of the limiting groove faces the slope surface of the bent portion.

[0044] refer to Figure 3, Figure 6 , Fig.11 and Fig.12 As shown, the inner wall of the handle 10 is slidably connected with a depth limiting slider 116, and a slideway is provided on the side wall of the depth limiting slider 116 facing the outer needle tube fixing block 18, and the outer needle tube fixing block 18 and the middle needle tube fixing block 112 are both slidably connected inside the slideway, and a first limiting slide groove and a second limiting slide groove are provided on the inner wall of the slideway, and a side wall of the outer needle tube fixing block 18 facing the depth limiting slider 116 has a first limiting slider, and the first limiting slider is slidably connected inside the corresponding first limiting slide groove, and the first limiting slider cooperates with the first limiting slide groove to limit the outer needle tube fixing block 18, thereby maintaining the stability of the outer needle tube fixing block 18 when sliding, and the middle needle tube fixing block 112 has a second limiting slider on the side facing the depth limiting slider 116, and the second limiting slider is slidably connected inside the corresponding second limiting slide groove, and the second limiting slider cooperates with the second limiting slide groove to limit the middle needle tube fixing block 112, thereby maintaining the stability of the middle needle tube fixing block 112 when sliding.

[0045] refer to Figure 2 and Figure 3 As shown, a sliding opening is provided on the outer wall of one end of the hollow circular protrusion 115 with a larger diameter, and a depth rotation knob 114 is rotatably connected to the outer wall of the one end of the hollow circular protrusion 115 with a larger diameter. A limit block 120 is fixed to the inner wall of the depth rotation knob 114, and the limit block 120 is stepped and slidably connected to the inside of the sliding opening.

[0046] Since a pointer line is provided on the outer surface of the left shell 101, and a depth line is also provided on the depth rotating knob 114, when the pointer line points to the value 0 of the depth rotating knob 114, the longer side of the limit block 120 presses against the depth limit slider 116, so that the depth limit slider 116 is in a locked state. When the value 0 of the depth rotating knob 114 slowly rotates to 20, the stepped surface of the limit block 120 is shortened accordingly, thereby controlling the length of the outer needle tube 19 and the middle needle tube 113 entering the human body to take specimens.

[0047] When the fully automatic biopsy needle is used, the bolt 13 is pulled, and the bolt 13 will slide to the end of the inner needle fixing block 14. At this time, the bolt 13 will compress the auxiliary spring 17, and at the same time, the inner column 16 will slide into the first U-shaped cavity, and the push block of the bolt 13 will press against the inner wall of the connecting port of the outer needle tube fixing block 18, and drive the outer needle tube fixing block 18, the middle needle tube fixing block 112 and the depth limiting slider 116 to slide toward the inner needle fixing block 14. At this time, the outer needle tube fixing block 18 compresses the main spring 110. When the bolt 13 is pulled to the limit position, the warping of the outer needle tube fixing block 18 The raised portion is located behind the limiting protrusion, and the plane of the raised portion contacts the plane of the limiting protrusion. At this time, the limiting protrusion limits the outer needle tube fixing block 18 by pressing against the raised portion, and the bent portion of the elastic buckle 117 is located inside the limiting groove close to the step surface of the outer needle tube fixing block 18, and the first limiting slide slides to the tail end of the first limiting slide groove, and the second limiting slide slides to the tail end of the second limiting slide groove, and then the bolt 13 is released. At this time, the bolt 13 is driven by the secondary spring 17 to reset, and at this time the pointer is first aligned with the value 0 of the depth line, the middle needle tube fixing block 112, the depth The depth limiting slider 116 and the outer needle tube fixing block 18 are in a locked state. When the cylinder on the gun head 11 is inserted into the place where the specimen needs to be taken, the depth rotating knob 114 is turned to adjust the depth of the outer needle tube 19 and the middle needle tube 113 to take the specimen, and then the pressing piece 111 is pressed. At this time, the raised portion of the outer needle tube fixing block 18 will be separated from the limit of the limiting protrusion, and the main spring 110 drives the outer needle tube fixing block 18 to reset, and the outer needle tube fixing block 18 drives the depth limiting slider 116 and the middle needle tube fixing block 112 to slide toward the gun head 11, and the three-point barb of the middle needle tube 113 will cut For the specimen inside the cylinder, since the depth limit slider 116 first presses against the stepped surface of the limit block 120, the second limit slider of the middle needle tube fixing block 112 will first press against the front end wall of the second limit slot. At this time, the middle needle tube fixing block 112 stops sliding, and the outer needle tube fixing block 18 will continue to move forward 2.5 mm until the first limit slider presses against the front end wall of the first limit slot. At this time, the cutting portion of the outer needle tube 19 will slide into the inside of the cutting port to remove the specimen inside the middle needle tube 113, and the cutting portion will block the cutting port. After the specimen is removed, the biopsy needle can be taken out.

[0048] The biopsy needle weighs about 35 grams, and the three-dimensional dimensions of the main body are 155*48*20, which is relatively light. At the same time, the appearance of our product is round, suitable for a variety of holding postures, and suitable for traditional hand-held operation, as well as thumb, index finger and middle finger pinching operation. At the same time, the curved surface design makes the grip comfortable and the control accuracy is greatly improved, which is convenient for refined operation. The noise reduction design is adopted, and the impact noise generated when firing is greatly reduced. The maximum noise of the product at 20cm is about 55Bd.

[0049] refer to Figure 3 , Figure 4 , Fig.11 , Fig.12 and Fig.13 As shown, in order to facilitate the middle needle tube 113 to cut the specimen, the present invention also provides a second embodiment.

[0050] A rotating assembly 30 is also provided inside the handle 10. The rotating assembly 30 includes a connecting circular plate 32 provided at the recessed portion of the shell seam of the right shell 102. A circular hole is provided on the right shell 102. A driving column 31 is slidably connected inside the circular hole. One end of the driving column 31 away from the connecting circular plate 32 extends to the inside of the handle 10, and the other end of the driving column 31 is fixed to a side wall of the connecting circular plate 32. A reset spring 33 is fixed between the connecting circular plate 32 and the right shell 102, which is used to limit the driving column 31, thereby facilitating the reset of the driving column 31. The depth limiting slide A first sliding opening 34 is provided on one side of the block 116, a second sliding opening 35 is provided on one side of the middle needle tube fixing block 112, and the driving column 31 is slidably connected to the inside of the first sliding opening 34 and the second sliding opening 35, a spiral groove 36 is provided on the outer wall of one end of the middle needle tube 113 close to the inner needle fixing block 14, and the driving column 31 is located inside the spiral groove 36, a limiting square block 37 is fixed on the outer surface of the middle needle tube 113, a limiting square groove 38 is provided on the outer wall of one end of the outer needle tube 19 close to the inner needle fixing block 14, and the limiting square block 37 is located inside the limiting square groove 38.

[0051] Since the end of the spiral groove 36 close to the inner needle fixing block 14 is the tail end, the other end of the spiral groove 36 is the head end. When the middle needle tube fixing block 112 is in a locked state, the driving column 31 is located at the head end of the spiral groove 36. When the inner needle fixing block 14 is unlocked and the middle needle tube 113 cuts the specimen, the middle needle tube 113 will rotate. At the same time, the middle needle tube 113 will drive the outer needle tube 19 to rotate through the limiting square block 37 and the limiting square groove 38, thereby keeping the cutting part corresponding to the cutting port, and facilitating the middle needle tube 113 to easily cut the specimen.

[0052] The present invention has a compact structure, is more compact as a whole, and has a rounded appearance, which improves the comfort of the user when sampling and is suitable for fine finger-pinching operations (similar products require hand-grip operations).

[0053] It should be noted that in the description of the present invention, the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings, which are only for the convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0054] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0055] So far, the technical solutions of the present invention have been described in conjunction with the preferred embodiments shown in the accompanying drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will fall within the protection scope of the present invention.

Claims

1. A fully automatic biopsy needle suitable for refined operation, characterized in that: include: The handle (10) is composed of a left shell (101) and a right shell (102). A hollow circular protrusion (115), a bolt (13) and a pressing piece (111) are provided on one side of the handle (10). A gun head (11) is provided on the side of the hollow circular protrusion (115) away from the handle (10). A depth rotation knob (114) is provided on the hollow circular protrusion (115). A limit block (120) is provided on the depth rotation knob (114). An inner needle fixing block (14), a middle needle tube fixing block (112), an outer needle tube fixing block (18) and a depth limit slider (116) are provided inside the handle (10). An inner needle (15) is provided inside the inner needle fixing block (14). The inner needle (15) is away from the inner needle One end of the needle fixing block (14) is in the shape of a spike, a middle needle tube (113) is provided inside the middle needle tube fixing block (112), an end of the middle needle tube (113) away from the inner needle fixing block (14) is in the shape of a three-diamond spike, a cutting opening is provided on the outer surface of the middle needle tube (113), an outer needle tube (19) is provided inside the outer needle tube fixing block (18), an end of the outer needle tube (19) away from the inner needle fixing block (14) has a cutting portion, the cutting portion is in a bent shape, and the inner concave part of the cutting portion faces the inner needle (15), the outer wall of the larger diameter end of the hollow circular convex part (115) is rotatably connected to the depth rotation knob (114), the inner wall of the depth rotation knob (114) is fixed with a limit block (120), and the limit block (120) is in a stepped shape; A rotating assembly (30), the rotating assembly (30) being arranged inside the handle (10) and used to rotate the middle needle tube (113) and the outer needle tube (19), so that the middle needle tube (113) cuts the specimen in a rotating manner; The handle (10) is further provided with a rotating assembly (30) inside. The rotating assembly (30) comprises a connecting circular plate (32) arranged at a shell seam recess of the right shell (102). The right shell (102) is provided with a circular hole. A driving column (31) is slidably connected inside the circular hole. One end of the driving column (31) away from the connecting circular plate (32) extends to the inside of the handle (10). The other end of the driving column (31) is fixed to a side wall of the connecting circular plate (32). The connecting circular plate (32) A return spring (33) is fixed between the right shell (102), a first sliding opening (34) is provided on one side of the depth limiting slider (116), a second sliding opening (35) is provided on one side of the middle needle tube fixing block (112), and the driving column (31) is slidably connected inside the first sliding opening (34) and the second sliding opening (35), a spiral groove (36) is provided on the outer wall of one end of the middle needle tube (113) close to the inner needle fixing block (14), and the driving column (31) is located inside the spiral groove (36); A limiting square block (37) is fixed on the outer surface of the middle needle tube (113); a limiting square groove (38) is provided on the outer wall of one end of the outer needle tube (19) close to the inner needle fixing block (14); and the limiting square block (37) is located inside the limiting square groove (38).

2. A fully automatic biopsy needle suitable for refined operation according to claim 1, characterized in that: The handle (10) is provided with an opening group (12) on the outside, and the opening group (12) includes a first opening and a second opening, and the first opening is provided on the left shell (101), and the second opening is provided on the right shell (102), the first opening and the second opening are connected, and a bolt (13) is slidably connected to the inside of the opening group (12), and a side of the bolt (13) away from the gun head (11) has a first U-shaped cavity and a second U-shaped cavity, and the second U-shaped cavity is located below the first U-shaped cavity, and the second U-shaped cavity is close to the handle (10) in depth, and a push block is fixed to a side of the bolt (13) close to the gun head (11).

3. A fully automatic biopsy needle suitable for refined operation according to claim 2, characterized in that: The inner needle fixing block (14) has an end on one side facing the opening group (12), an inner column (16) is fixed to one side of the end of the inner needle fixing block (14), an auxiliary spring (17) is arranged outside the inner column (16), and the auxiliary spring (17) and the inner needle (15) are both located inside the second U-shaped cavity.

4. A fully automatic biopsy needle suitable for refined operation according to claim 3, characterized in that: A main spring (110) is fixed between the side of the outer needle tube fixing block (18) facing the inner needle fixing block (14) and the inner needle fixing block (14).

5. The fully automatic biopsy needle suitable for refined operation according to claim 1, characterized in that: The outer needle tube fixing block (18) has a convex opening, a convex cavity and a connecting opening, and the convex opening, the convex cavity and the connecting opening are all connected, and the connecting opening is close to the gun head (11), and the convex opening is close to the inner needle fixing block (14), and the convex cavity is located between the convex opening and the connecting opening.

6. The fully automatic biopsy needle suitable for delicate operation according to claim 1, characterized in that: The outer needle tube fixing block (18) has a raised portion at the top end facing the gun head (11), the raised portion is plane on the side facing the gun head (11), the inclined surface of the raised portion faces the inclined surface of the pressing member (111), a limiting protrusion is fixed to the inner wall of the left shell (101), the plane of the limiting protrusion faces the plane of the raised portion, and the plane of the raised portion contacts the plane of the limiting protrusion.

7. The fully automatic biopsy needle suitable for refined operation according to claim 6, characterized in that: An elastic buckle (117) is provided on one side of the middle needle tube fixing block (112) facing the outer needle tube fixing block (18), and the elastic buckle (117) is composed of a bent portion and a cylinder, and the cylinder is fixed to the top end of the bent portion.

8. The fully automatic biopsy needle suitable for refined operation according to claim 7, characterized in that: A limiting groove group (118) is provided on an outer wall of a side of the outer needle tube fixing block (18) facing the bolt (13), and the limiting groove group (118) consists of two limiting linkage grooves, and the bending portion is located inside the limiting groove close to the step surface of the outer needle tube fixing block (18), and the slope surface of the bending portion faces the slope surface of the limiting groove, and the slope surface of the limiting groove faces the slope surface of the bending portion.

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