Angle positioner for puncture of ablation biopsy needle under guidance of CT (Computed Tomography)

Abstract

The invention discloses an angle positioner for ablation biopsy needle puncture under CT guidance, and belongs to the technical field of ablation biopsy needle angle positions.In the moving process, a driving gear at the outer end of a rotating rod drives a first driven gear and a second driven gear to be linked, a right-hand thread screw and a left-hand thread screw are driven to rotate, and the right-hand thread screw is driven to rotate; the right-hand thread screw and the left-hand thread screw push the abutting pad to extend outwards to be fixed in the rotating process, the fixing function can be achieved in the moving process, the double-linkage function is achieved, the abutting pad can also be rotated manually to move outwards and inwards, and the fixing effect is achieved. An inner angle scanning piece and an angle identification groove are matched for use, the rotating angle is measured in the rotating process of a biopsy needle angle adjusting piece, focusing can be rapidly carried out while the rotating precision is improved, alignment laser and a biopsy needle containing groove are matched for use, the alignment laser is correspondingly connected with the focusing point of fixed laser and the focusing point of rotating laser, and the alignment precision is improved. The function that the biopsy needle can be independently adjusted is achieved.

Description

Technical Field

[0001] The invention relates to an angle positioner for ablation biopsy needle puncture under CT guidance, belonging to the technical field of ablation biopsy needle angle positioners. Background Art

[0002] Percutaneous puncture biopsy under CT guidance is one of the important methods for diagnosing the nature of deep tumors such as lungs, liver, and kidneys. However, the ideal puncture angle guided by CT is often between 0 and 90 degrees from the horizontal line, that is, the operator must estimate the angle to accurately insert the needle and successfully puncture. For the angle of needle insertion, most clinicians estimate it with the naked eye, and more carefully use a protractor to draw or focus through a laser. Traditional biopsy needle angle positioning devices are mostly manually focused by a handheld protractor or a laser focusing device and a rotating focusing device.

[0003] For example, a percutaneous puncture medical device disclosed in application number: CN103815971B includes a base, a base level, a protractor level seat, a protractor, a protractor level, an aiming sleeve seat and an aiming sleeve; the base level is arranged on the base, the protractor level seat is arranged on the side of the base and is rotatably connected to the base, the protractor level is arranged on the protractor level seat, the protractor level seat, the protractor and the aiming sleeve seat connecting piece are connected to each other, the connecting piece passes through the center of the protractor, the protractor level seat is fixedly connected to the protractor, the aiming sleeve seat can rotate relative to the protractor, the protractor is located between the protractor level seat and the aiming sleeve seat, the aiming sleeve is arranged on the aiming sleeve seat, the accuracy of the horizontal and vertical planes is controlled by the base level and the protractor level of the puncture locator, and the device has the outstanding advantages of accurate and reliable angle positioning, ensuring the accurate insertion angle of the puncture biopsy needle, and significantly improving the one-time puncture success rate.

[0004] Based on the search and analysis, the existing technology still has deficiencies: In the prior art, the biopsy needle fixing device requires a worker to manually turn a rotating member to adjust the focus angle of the laser during use, which makes the operation complicated. In the prior art, biopsy needle placement devices and fixing devices are usually manually fixed and moved during use, which may cause inaccurate laser focusing. The biopsy needle in the prior art has a relatively simple adaptation during use, and the biopsy needle fixing device and the biopsy needle are mostly fixed structures, which makes it difficult to adjust the angle of the biopsy needle. Summary of the invention

[0005] The main purpose of the present invention is to provide a multi-angle and multi-directional positioner for an ablation biopsy needle used for puncture under CT guidance.

[0006] The purpose of the present invention can be achieved by adopting the following technical solutions: An angle locator for ablation biopsy needle puncture under CT guidance, comprising a biopsy needle limiting rod for limiting the position of the biopsy needle, wherein a biopsy needle placement groove is provided through the middle of the biopsy needle limiting rod; A biopsy needle fixing part is clamped and installed in the biopsy needle placement groove, an alignment laser is installed around the outer circle of the biopsy needle placement groove, the bottom of the biopsy needle limit rod is fixedly installed on the bed by a mobile positioning mechanism, the biopsy needle limit rod is swingably installed on the limit driving mechanism, the limit driving mechanism is rotatably connected to the angle detection mechanism, and a pushing mechanism is installed at the bottom of the angle detection mechanism.

[0007] Preferably, the mobile positioning mechanism includes a moving block, a stabilizing slide rod, a rotating rod, a driving member, a cushion, a positive screw, a negative screw, a driving hole, a moving hole, a main gear, a slave gear 1 and a slave gear 2; The biopsy needle limit rod is fixedly connected to the base, and stable sliding rods are fixedly installed on both sides of the base. A rotating rod is rotatably installed in the middle of the base. A moving block is sleeved on the stable sliding rod and the rotating rod. The stable sliding rod passes through the driving hole on the moving block and is fixedly connected to the base. The rotating rod passes through the moving hole and is rotatably connected to the base. Main gears for linkage are respectively installed at both ends of the rotating rod; Slave gear one and slave gear two are respectively meshed on both sides of the main gear, a reverse screw is installed at the outer end of the slave gear two, and a positive screw is installed at the outer end of the slave gear one, and pads are respectively installed in the positive screw and the reverse screw for rotation, and a driving member is installed on the base, and the output end of the driving member is rotationally connected to the rotating rod.

[0008] Preferably, the limit drive mechanism includes a biopsy needle angle adjustment member, a swing slot, a swing stabilizing member, an angle adjustment drive member and a swing drive member; The biopsy needle limit rod is swingably installed in a swinging groove on the biopsy needle angle adjustment piece, a swinging driving piece is installed on one side of the swinging groove, the output end of the swinging driving piece is drive-connected to the biopsy needle limit rod, swinging stabilizing pieces are respectively installed on both sides of the swinging groove, a limit slider is slidably installed in the swing stabilizing piece, the other end of the limit slider is fixedly connected to the biopsy needle limit rod, and the biopsy needle angle adjustment piece is drive-connected by the angle adjustment driving piece.

[0009] Preferably, the angle detection mechanism includes an angle detection member, a fixed laser, an angle marking groove, and a rotating laser; The biopsy needle angle adjustment piece is covered with angle detection pieces on both sides, an angle identification groove is opened around the outer circle of the angle detection piece, an inner angle scanning piece corresponding to the angle identification groove is on the biopsy needle angle adjustment piece, fixed lasers are installed on both sides of the axis of the angle detection piece, and rotating lasers are installed on the inner angle scanning pieces on both sides of the biopsy needle angle adjustment piece.

[0010] Preferably, the pushing mechanism includes a lifting drive member, a lifting block, a slide plate, a stabilizing groove and a limit block. The angle detection member is respectively provided with a stabilizing groove, a limit block is fixedly installed in the stabilizing groove on the angle detection member, a slide plate is slidably installed in the stabilizing groove, a lifting block is installed at the bottom of the slide plate, and a lifting drive member is installed at the bottom of the lifting block.

[0011] Preferably, the positive screw and the reverse screw push the abutment pad outward.

[0012] Preferably, the driving member drives the rotating rod and the main gear to rotate, and the main gear drives the slave gear 1 and the slave gear 2 to be rotationally connected.

[0013] Preferably, the biopsy needle limiting rod is connected by a limiting slider to swing along a swing stabilizing member in the biopsy needle angle adjusting member.

[0014] Preferably, the biopsy needle angle adjustment member is rotatably connected along the angle detection member, and the internal angle scanning member is used in conjunction with the angle identification groove.

[0015] Preferably, the slide plate on the lifting block is slidably connected along the stabilizing groove, and the slide plate is limited by the limiting block.

[0016] Preferably, the lifting drive member drives the lifting block and the angle detection member to be lifted and connected.

[0017] Beneficial technical effects of the present invention: The present invention provides an angle positioner for ablation biopsy needle puncture under CT guidance, wherein a stable sliding rod and a rotating rod are distributed in the base, and a driving member is installed on the outer side of the base, wherein the driving member drives the rotating rod to rotate, and the rotating rod drives the moving block to move laterally, and during the rotation of the rotating rod, the moving block is driven to move along the stable sliding rod and the rotating rod in the base, and during the movement, the main gear at the outer end of the rotating rod drives the slave gear 1 and the slave gear 2 to be linked, and drives the positive screw and the reverse screw to rotate, and during the rotation, the positive screw and the reverse screw push the abutment pad to extend outward for fixing, thereby realizing the function of fixing in the process of moving, realizing the function of double linkage, and the abutment pad can also be moved outward and inward by manual rotation, thereby realizing the function of automatic movement; The moving block is installed with a lifting block, and angle detection parts are installed on both sides of the lifting block respectively, and an angle identification groove is provided on the angle detection part. A fixed laser is installed in the middle of the angle detection part, and a biopsy needle angle adjustment part is rotatably installed in the angle detection part. An internal angle scanning part is installed on the biopsy needle angle adjustment part, and a rotating laser is installed on the internal angle scanning part. The rotating laser of the biopsy needle angle adjustment part cooperates with the fixed laser to realize the focusing function during the swinging process. The internal angle scanning part cooperates with the angle identification groove to realize the measurement of the rotation angle of the biopsy needle angle adjustment part during the rotation process, thereby improving the rotation accuracy and quickly focusing; A biopsy needle limiting rod is swingably installed in the swinging groove on the biopsy needle angle adjustment member, a biopsy needle fixing member that can move in opposite directions is installed in the biopsy needle limiting rod, and the biopsy needle fixing member can clamp the biopsy needle, a swinging driving member is installed on the biopsy needle angle adjustment member, and the swinging driving member is drivingly connected to the biopsy needle limiting rod, an alignment laser is installed on the outer ring of the biopsy needle placement groove, and the alignment laser is used in conjunction with the biopsy needle placement groove, and the alignment laser is connected to the focus points of the fixed laser and the rotating laser correspondingly, so that the function of the biopsy needle being able to be adjusted separately is realized; The biopsy needle angle adjustment member is provided with a swinging stabilizing member, a limiting slider is slidably installed in the swinging stabilizing member, the limiting slider is fixedly connected to the biopsy needle limiting rod, the biopsy needle limiting rod is firmly slidably connected to the swinging stabilizing member, and stabilizing grooves are respectively installed on the outer sides of the angle detection member, a slide plate is slidably installed in the stabilizing groove, and the bottom of the slide plate is fixedly connected to the lifting block, and the slide plate is driven to be lifted and lowered along the stabilizing groove by lifting and lowering the lifting block, and the lifting stability of the lifting block, the angle detection member, the biopsy needle angle adjustment member and the biopsy needle limiting rod is improved by sliding the slide plate along the stabilizing groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall three-dimensional structure of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention; Figure 2 A schematic diagram of a base of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention; Figure 3 A schematic diagram of the moving structure of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention; Figure 4 A schematic diagram of a moving angle monitoring structure of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention; Figure 5 A schematic diagram of biopsy needle rotation stabilization according to a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance of the present invention; Figure 6 A schematic diagram of a biopsy needle rotation limit according to a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance of the present invention; Figure 7 It is an overall top view of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention; Figure 8It is an enlarged view of the structure at A of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention; Fig. 9 A schematic diagram of angle monitoring of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention; Fig.10 A side view of the overall structure of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention; Fig.11 A schematic diagram of a moving linkage structure of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention; Fig.12 The figure is a side view of the moving linkage structure of a preferred embodiment of an angle positioner for ablation biopsy needle puncture under CT guidance according to the present invention.

[0019] In the figure: 1. base; 2. moving block; 3. stabilizing slide bar; 4. rotating rod; 5. driving part; 6. cushion; 7. positive screw; 8. reverse screw; 9. lifting driving part; 10. lifting block; 11. slide plate; 12. stabilizing slot; 13. angle detection part; 14. fixed laser; 15. angle marking slot; 16. rotating laser; 17. swinging slot; 18. swinging stabilizing part; 19. biopsy needle limiting rod; 20. biopsy needle placement slot; 21. alignment laser; 22. driving hole; 23. moving hole; 24. inner angle scanning part; 25. biopsy needle angle adjustment part; 26. angle adjustment driving part; 27. limiting slider; 28. swinging driving part; 29. ​​biopsy needle fixing part; 30. limiting block; 31. main gear; 32. slave gear one; 33. slave gear two. DETAILED DESCRIPTION

[0020] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0021] like Figure 1 - Fig.12 As shown, the present embodiment provides an angle positioner for ablation biopsy needle puncture under CT guidance, including a biopsy needle limiting rod 19 for limiting the position of the biopsy needle, and a biopsy needle placement groove 20 is formed in the middle of the biopsy needle limiting rod 19; A biopsy needle fixing part 29 is clamped and installed in the biopsy needle placement groove 20, and an alignment laser 21 is installed around the outer circle of the biopsy needle placement groove 20. The bottom of the biopsy needle limit rod 19 is fixedly installed on the bed by a mobile positioning mechanism. The biopsy needle limit rod 19 is swingably installed on the limit driving mechanism. The limit driving mechanism is rotatably connected to the angle detection mechanism, and a pushing mechanism is installed at the bottom of the angle detection mechanism.

[0022] The mobile positioning mechanism includes a moving block 2, a stabilizing slide bar 3, a rotating bar 4, a driving member 5, a cushion 6, a positive screw 7, a reverse screw 8, a driving hole 22, a moving hole 23, a main gear 31, a slave gear 1 32 and a slave gear 2 33; The biopsy needle limit rod 19 is fixedly connected to the base 1, and stable slide rods 3 are fixedly installed on both sides of the base 1. A rotating rod 4 is rotatably installed in the middle of the base 1. The moving block 2 is sleeved on the stable slide rod 3 and the rotating rod 4. The stable slide rod 3 passes through the driving hole 22 on the moving block 2 and is fixedly connected to the base 1. The rotating rod 4 passes through the moving hole 23 and is rotatably connected to the base 1. Main gears 31 for linkage are respectively installed at both ends of the rotating rod 4; The two sides of the main gear 31 are respectively meshed with a slave gear 1 32 and a slave gear 2 33. The outer end of the slave gear 2 33 is installed with a reverse screw 8, and the outer end of the slave gear 1 32 is installed with a positive screw 7. Abutment pads 6 are respectively installed in the positive screw 7 and the reverse screw 8 for rotation. A driving member 5 is installed on the base 1, and the output end of the driving member 5 is rotationally connected to the rotating rod 4.

[0023] The limit drive mechanism includes a biopsy needle angle adjustment member 25, a swing slot 17, a swing stabilizing member 18, an angle adjustment drive member 26 and a swing drive member 28; The biopsy needle limit rod 19 is swingably installed in the swing groove 17 on the biopsy needle angle adjustment member 25, and a swing driving member 28 is installed on one side of the swing groove 17. The output end of the swing driving member 28 is drivingly connected to the biopsy needle limit rod 19. Swing stabilizing members 18 are respectively installed on both sides of the swing groove 17. A limit slider 27 is slidably installed in the swing stabilizing member 18. The other end of the limit slider 27 is fixedly connected to the biopsy needle limit rod 19. The biopsy needle angle adjustment member 25 is driven and connected by the angle adjustment driving member 26.

[0024] The angle detection mechanism includes an angle detection member 13, a fixed laser 14, an angle marking groove 15, and a rotating laser 16; The biopsy needle angle adjustment member 25 is covered on both sides by the angle detection member 13, the outer circle of the angle detection member 13 is surrounded by an angle identification groove 15, the biopsy needle angle adjustment member 25 has an inner angle scanning member 24 corresponding to the angle identification groove 15, and fixed lasers 14 are respectively installed on both sides of the axis of the angle detection member 13, and rotating lasers 16 are installed on the inner angle scanning members 24 on both sides of the biopsy needle angle adjustment member 25.

[0025] The pushing mechanism includes a lifting drive component 9, a lifting block 10, a slide plate 11, a stabilizing groove 12 and a limit block 30. The stabilizing grooves 12 are respectively installed on the angle detection component 13. The limit block 30 is fixedly installed in the stabilizing groove 12 on the angle detection component 13. The slide plate 11 is slidably installed in the stabilizing groove 12. The lifting block 10 is installed at the bottom of the slide plate 11, and the lifting drive component 9 is installed at the bottom of the lifting block 10.

[0026] The positive screw 7 and the negative screw 8 push the stop pad 6 to move outward.

[0027] The driving member 5 drives the rotating rod 4 and the main gear 31 to rotate, and the main gear 31 drives the slave gear 1 32 and the slave gear 2 33 to be rotationally connected.

[0028] The biopsy needle limiting rod 19 is connected by a limiting slider 27 to swing along the swing stabilizing member 18 in the biopsy needle angle adjusting member 25 .

[0029] The biopsy needle angle adjustment member 25 is rotatably connected along the angle detection member 13 , and the inner angle scanning member 24 is used in conjunction with the angle identification groove 15 .

[0030] The slide plate 11 on the lifting block 10 is slidably connected along the stabilizing groove 12 , and the slide plate 11 is limited by the limiting block 30 .

[0031] The lifting driving member 9 pushes the lifting block 10 and the angle detection member 13 to be lifted and connected.

[0032] like Figure 1 - Fig.12As shown, the working process of an angle locator for ablation biopsy needle puncture under CT guidance provided by this embodiment is as follows: connect the device to a power source, and drive the rotating rod 4 to rotate by starting the angle identification slot 15. During the rotation of the rotating rod 4, the moving block 2 is driven to move along the stable sliding rod 3 and the rotating rod 4 in the base 1. During the movement, the main gear 31 at the outer end of the rotating rod 4 drives the slave gear 1 32 and the slave gear 2 33 to rotate in linkage, driving the positive screw 7 and the reverse screw 8 to rotate. During the rotation, the positive screw 7 and the reverse screw 8 push the pad 6 to extend outward to be fixed at the bed. After the base 1 is fixed, start the fixed laser 14, the rotating laser 16 and the aiming laser 21. After the laser is turned on The biopsy needle angle adjustment member 25 is driven by the driving member to rotate along the angle detection member 13, and the biopsy needle limit rod 19 is driven to swing back and forth by the swing driving member 28. During the rotation of the angle identification groove 15, it cooperates with the fixed laser 14 on the angle detection member 13 to focus and accurately measure the focus point, so that the angle can be adjusted in multiple directions. During the adjustment process, the rotation angle can be automatically and accurately measured. The angle of the biopsy needle can be swung separately, and during the swinging process, it is reinforced by the swing stabilizing member 18, the slide plate 11 and the stabilizing groove 12. The lifting block 10 is pushed by the lifting driving member 9 to adjust the height, and the moving block 2, the stabilizing slide bar 3 and the rotating rod 4 are used for lateral movement. The device can realize the function of moving and focusing in the X, Y and Z axes.

[0033] Embodiment 1: Figure 1 , Fig.11 and Fig.12 As shown, a stabilizing slide bar 3 and a rotating rod 4 are distributed in the base 1, and a driving member 5 is installed on the outer side of the base 1. The driving member 5 drives the rotating rod 4 to rotate, and the rotating rod 4 drives the moving block 2 to move horizontally. During the rotation of the rotating rod 4, the moving block 2 is driven to move along the stabilizing slide bar 3 and the rotating rod 4 in the base 1. During the movement, the main gear 31 at the outer end of the rotating rod 4 drives the slave gear 1 32 and the slave gear 2 33 to be linked, and drives the positive screw 7 and the reverse screw 8 to rotate. During the rotation, the positive screw 7 and the reverse screw 8 push the pad 6 to extend outward for fixing, thereby realizing the function of fixing during the movement and the function of double linkage. The pad 6 can also be moved outward and inward by manual rotation to realize the function of automatic movement.

[0034] Embodiment 2: Figure 1 - Fig.12As shown, a lifting block 10 is installed on the moving block 2, and angle detection parts 13 are installed on both sides of the lifting block 10 respectively. An angle identification groove 15 is opened on the angle detection part 13, and a fixed laser 14 is installed in the middle of the angle detection part 13. A biopsy needle angle adjustment part 25 is rotatably installed in the angle detection part 13, and an internal angle scanning part 24 is installed on the biopsy needle angle adjustment part 25. A rotating laser 16 is installed on the internal angle scanning part 24. During the swinging process of the biopsy needle angle adjustment part 25, the rotating laser 16 cooperates with the fixed laser 14 to realize the focusing function. The internal angle scanning part 24 cooperates with the angle identification groove 15 to realize the measurement of the rotation angle of the biopsy needle angle adjustment part 25 during the rotation process, thereby improving the rotation accuracy and quickly focusing.

[0035] Embodiment 3: Figure 1 - Fig.12 As shown, a biopsy needle limiting rod 19 is swingably installed in the swinging groove 17 on the biopsy needle angle adjustment member 25, and a biopsy needle fixing member 29 that can move in opposite directions is installed in the biopsy needle limiting rod 19. The biopsy needle fixing member 29 can clamp the biopsy needle, and a swinging driving member 28 is installed on the biopsy needle angle adjustment member 25. The swinging driving member 28 is drivingly connected to the biopsy needle limiting rod 19. An alignment laser 21 is installed on the outer ring of the biopsy needle placement groove 20. The alignment laser 21 is used in conjunction with the biopsy needle placement groove 20. The alignment laser 21 is connected to the focus points of the fixed laser 14 and the rotating laser 16 accordingly, so that the function of the biopsy needle being able to be adjusted separately is realized.

[0036] Embodiment 4: Figure 1 - Fig.12 As shown, a swing stabilizing member 18 is installed on the biopsy needle angle adjustment member 25, and a limiting slider 27 is slidably installed in the swing stabilizing member 18. The limiting slider 27 is fixedly connected to the biopsy needle limiting rod 19, and the biopsy needle limiting rod 19 is firmly slidably connected to the swing stabilizing member 18 through 27. The outer sides of the angle detection member 13 are respectively installed with stabilizing grooves 12, and a slide plate 11 is slidably installed in the stabilizing grooves 12. The bottom of the slide plate 11 is fixedly connected to the lifting block 10. The lifting and lowering of the lifting block 10 drives the slide plate 11 to be lifted and lowered along the stabilizing groove 12. The sliding of the slide plate 11 along the stabilizing groove 12 improves the lifting and lowering stability of the lifting block 10, the angle detection member 13, the biopsy needle angle adjustment member 25 and the biopsy needle limiting rod 19.

[0037] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. An angle positioner for ablation biopsy needle puncture under CT guidance, comprising a biopsy needle limiting rod (19) for limiting the position of the biopsy needle, wherein a biopsy needle placement groove (20) is provided through the middle of the biopsy needle limiting rod (19); Features: A biopsy needle fixing member (29) is clamped and installed in the biopsy needle placement groove (20), an alignment laser (21) is installed around the outer ring of the biopsy needle placement groove (20), the bottom of the biopsy needle limit rod (19) is fixedly installed with the bed body by a mobile positioning mechanism, the biopsy needle limit rod (19) is swingably installed on the limit driving mechanism, the limit driving mechanism is rotatably connected to the angle detection mechanism, and a pushing mechanism is installed at the bottom of the angle detection mechanism.

2. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 1, characterized in that: The mobile positioning mechanism comprises a moving block (2), a stabilizing slide rod (3), a rotating rod (4), a driving member (5), a cushion (6), a positive screw (7), a negative screw (8), a driving hole (22), a moving hole (23), a main gear (31), a slave gear 1 (32) and a slave gear 2 (33); The biopsy needle limit rod (19) is fixedly connected to the base (1), and a stabilizing slide rod (3) is fixedly installed on both sides of the base (1). A rotating rod (4) is rotatably installed in the middle of the base (1). A moving block (2) is sleeved on the stabilizing slide rod (3) and the rotating rod (4). The stabilizing slide rod (3) passes through a driving hole (22) on the moving block (2) and is fixedly connected to the base (1). The rotating rod (4) passes through the moving hole (23) and is rotatably connected to the base (1). Main gears (31) for linkage are respectively installed at both ends of the rotating rod (4); A slave gear 1 (32) and a slave gear 2 (33) are respectively meshed on both sides of the main gear (31); a reverse screw (8) is installed at the outer end of the slave gear 2 (33); a positive screw (7) is installed at the outer end of the slave gear 1 (32); and a stopper (6) is rotatably installed in the positive screw (7) and the reverse screw (8). A driving member (5) is installed on the base (1); and an output end of the driving member (5) is rotatably connected to the rotating rod (4).

3. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 2, characterized in that: The limit drive mechanism comprises a biopsy needle angle adjustment member (25), a swing groove (17), a swing stabilizing member (18), an angle adjustment drive member (26) and a swing drive member (28); The biopsy needle limiting rod (19) is swingably mounted in a swinging groove (17) on the biopsy needle angle adjustment member (25); a swinging driving member (28) is mounted on one side of the swinging groove (17); an output end of the swinging driving member (28) is drivingly connected to the biopsy needle limiting rod (19); swinging stabilizing members (18) are mounted on both sides of the swinging groove (17); a limiting slider (27) is slidably mounted in the swinging stabilizing member (18); the other end of the limiting slider (27) is fixedly connected to the biopsy needle limiting rod (19); and the biopsy needle angle adjustment member (25) is drivingly connected by the angle adjustment driving member (26).

4. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 3, characterized in that: The angle detection mechanism comprises an angle detection member (13), a fixed laser (14), an angle identification groove (15), and a rotating laser (16); The biopsy needle angle adjustment member (25) is covered on both sides by an angle detection member (13), an angle identification groove (15) is formed around the outer ring of the angle detection member (13), an inner angle scanning member (24) corresponding to the angle identification groove (15) is formed on the biopsy needle angle adjustment member (25), fixed lasers (14) are respectively installed on both sides of the axis of the angle detection member (13), and rotating lasers (16) are installed on the inner angle scanning members (24) on both sides of the biopsy needle angle adjustment member (25).

5. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 4, characterized in that: The pushing mechanism comprises a lifting drive member (9), a lifting block (10), a slide plate (11), a stabilizing groove (12) and a limit block (30); the angle detection member (13) is respectively provided with a stabilizing groove (12); the limit block (30) is fixedly installed in the stabilizing groove (12) on the angle detection member (13); the slide plate (11) is slidably installed in the stabilizing groove (12); the lifting block (10) is installed at the bottom of the slide plate (11); and the lifting drive member (9) is installed at the bottom of the lifting block (10).

6. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 5, characterized in that: The positive screw (7) and the negative screw (8) push the washer (6) outward.

7. The angle positioner for ablation biopsy needle puncture under CT guidance according to claim 6, characterized in that: The driving member (5) drives the rotating rod (4) and the main gear (31) to rotate, and the main gear (31) drives the slave gear 1 (32) and the slave gear 2 (33) to be rotationally connected.

8. The angle positioner for ablation biopsy needle puncture under CT guidance according to claim 7, characterized in that: The biopsy needle limiting rod (19) is connected by a limiting slider (27) to swing along the swing stabilizing member (18) in the biopsy needle angle adjusting member (25).

9. The angle positioner for ablation biopsy needle puncture under CT guidance according to claim 8, characterized in that: The biopsy needle angle adjustment member (25) is rotatably connected along the angle detection member (13), and the internal angle scanning member (24) is used in conjunction with the angle identification groove (15).

10. The angle positioner for ablation biopsy needle puncture under CT guidance according to claim 9, characterized in that: The slide plate (11) on the lifting block (10) is slidably connected along the stabilizing groove (12), and the slide plate (11) is limited by the limiting block (30).

11. The angle positioner for ablation biopsy needle puncture under CT guidance according to claim 9, characterized in that: The lifting drive member (9) drives the lifting block (10) and the angle detection member (13) to be lifted and connected.

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