An angle locator for ablation biopsy needle puncture under CT guidance

Abstract

The invention discloses an angle locator for ablation biopsy needle puncture under CT guidance, which belongs to the technical field of ablation biopsy needle angle locators. During the movement, the main gear at the outer end of the rotating rod drives the slave gear one and the slave gear two to be linked, and drives the positive screw and the reverse screw to rotate. During the rotation, the positive screw and the reverse screw push the abutment pad to extend outward for fixation, so as to realize the function of fixation during the movement and the function of double linkage. The abutment pad can also be moved outward and inward by manual rotation. The internal angle scanning part and the angle identification groove are used in combination to realize the measurement of the rotation angle of the biopsy needle angle adjustment part during the rotation, so as to improve the rotation accuracy and quickly focus. The alignment laser is used in combination with the biopsy needle placement groove, and the alignment laser is connected with the focusing points of the fixed laser and the rotating laser accordingly, so as to realize the function of the biopsy needle being able to be adjusted separately.

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:

[0005] 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.

[0006] 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.

[0007] 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

[0008] The main purpose of the present invention is to provide a positioner for a multi-angle and multi-directional ablation biopsy needle for puncture under CT guidance.

[0009] The object of the present invention can be achieved by adopting the following technical solutions:

[0010] An angle positioner for ablation biopsy needle puncture under CT guidance, including a biopsy needle limiting rod for limiting the biopsy needle, and a biopsy needle placement groove is provided through the middle of the biopsy needle limiting rod;

[0011] A biopsy needle fixing member 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 limiting rod is fixedly installed with the bed body by a moving positioning mechanism, the biopsy needle limiting rod is swingably installed on the limiting driving mechanism, the limiting driving mechanism is rotationally connected to the angle detection mechanism, and a pushing mechanism is installed at the bottom of the angle detection mechanism.

[0012] Preferably, the moving positioning mechanism includes a moving block, a stabilizing slide rod, a rotating rod, a driving member, a cushion, a positive screw, a reverse screw, a driving hole, a moving hole, a main gear, a first driven gear and a second driven gear;

[0013] The biopsy needle limiting rod is fixedly connected by a base, stabilizing slide rods are fixedly installed on both sides inside the base, a rotating rod is rotatably installed in the middle of the base, the stabilizing slide rod and the rotating rod are sleeved with a moving block, the stabilizing slide 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, and main gears for linkage are respectively installed at both ends of the rotating rod;

[0014] A first driven gear and a second driven gear are respectively meshed on both sides of the main gear, a reverse screw is installed at the outer end of the second driven gear, a positive screw is installed at the outer end of the first driven gear, cushions are respectively screwed and installed inside the positive screw and the reverse screw, and a driving member is installed on the base, and the output end of the driving member is rotationally connected to the rotating rod.

[0015] Preferably, the limiting driving mechanism includes a biopsy needle angle adjusting member, a swinging groove, a swinging stabilizing member, an angle adjusting driving member and a swinging driving member;

[0016] The biopsy needle limiting rod is swingably installed in the swinging groove on the biopsy needle angle adjusting member, a swinging driving member is installed on one side of the swinging groove, the output end of the swinging driving member is drivingly connected to the biopsy needle limiting rod, swinging stabilizing members are respectively installed on both sides in the swinging groove, a limiting slider is slidably installed in the swinging stabilizing member, the other end of the limiting slider is fixedly connected to the biopsy needle limiting rod, and the biopsy needle angle adjusting member is drivingly connected by an angle adjusting driving member.

[0017] Preferably, the angle detection mechanism includes an angle detection member, a fixed laser, an angle marking groove, a rotating laser;

[0018] Both sides of the biopsy needle angle adjuster are covered with angle detectors. Angle identification grooves are circumferentially formed on the outer ring of the angle detector. An inner angle scanner corresponding to the angle identification groove is provided on the biopsy needle angle adjuster. Fixed lasers are respectively installed on both sides of the axis of the angle detector, and rotating lasers are installed on the inner angle scanners on both sides of the biopsy needle angle adjuster.

[0019] Preferably, the pushing mechanism includes a lifting drive, a lifting block, a sliding plate, a stabilizing groove, and a limiting block. Stabilizing grooves are respectively installed on the angle detector. A limiting block is fixedly installed in the stabilizing groove on the angle detector. A sliding plate is slidably installed in the stabilizing groove. A lifting block is installed at the bottom of the sliding plate, and a lifting drive is installed at the bottom of the lifting block.

[0020] Preferably, the positive screw and the reverse screw push the cushion outward.

[0021] Preferably, the drive drives the rotating rod and the main gear to rotate, and the main gear drives the first driven gear and the second driven gear to rotate and connect.

[0022] Preferably, the biopsy needle limiting rod is swingably connected by a limiting slider along a swinging stabilizer in the biopsy needle angle adjuster.

[0023] Preferably, the biopsy needle angle adjuster is rotatably connected along the angle detector, and the inner angle scanner is used in cooperation with the angle identification groove.

[0024] Preferably, the sliding plate on the lifting block slides along the stabilizing groove, and the sliding plate is limited by the limiting block.

[0025] Preferably, the lifting drive pushes the lifting block and the angle detector to be liftably connected.

[0026] The beneficial technical effects of the present invention:

[0027] An angle locator for ablation biopsy needle puncture under CT guidance provided by the present invention. Stable sliding rods and rotating rods are distributed in the base. A drive is installed on the outer side of the base. The drive drives the rotating rod to rotate. By the rotation of the rotating rod, the moving block is driven to move horizontally. 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. During the moving process, the first driven gear and the second driven gear are driven to be linked by the main gear at the outer end of the rotating rod, driving the positive screw and the reverse screw to rotate. During the rotation of the positive screw and the reverse screw, the cushion is pushed to extend outward for fixation, realizing the function of being fixed during the moving process, realizing the function of double linkage. The cushion can also be rotated manually to move outward and inward, realizing the function of automatic movement;

[0028] A lifting block is installed on the moving block. Angle detection components are respectively installed on both sides of the lifting block. Angle marking grooves are formed on the angle detection components. A fixed laser is installed in the middle of the angle detection components. A biopsy needle angle adjustment component is rotatably installed in the angle detection components. An inner angle scanning component is installed on the biopsy needle angle adjustment component. A rotating laser is installed on the inner angle scanning component. During the swinging process of the biopsy needle angle adjustment component, the rotating laser cooperates with the fixed laser to achieve the focusing function. By using the inner angle scanning component in cooperation with the angle marking grooves, the rotation angle of the biopsy needle angle adjustment component during rotation is measured, which can improve the rotation accuracy and quickly perform focusing;

[0029] A biopsy needle limiting rod is swingably installed in a swinging groove on the biopsy needle angle adjustment component. A biopsy needle fixing component that can move oppositely is installed in the biopsy needle limiting rod. The biopsy needle fixing component can clamp the biopsy needle. A swinging driving component is installed on the biopsy needle angle adjustment component. The swinging driving component is drivingly connected to the biopsy needle limiting rod. An alignment laser is installed on the outer circle of the biopsy needle placement groove. The alignment laser is used in cooperation with the biopsy needle placement groove. By correspondingly connecting the alignment laser with the focus points of the fixed laser and the rotating laser, the function of individually adjusting the biopsy needle is achieved;

[0030] A swinging stabilizing component is installed on the biopsy needle angle adjustment component. A limiting slider is slidably installed in the swinging stabilizing component. The limiting slider is fixedly connected to the biopsy needle limiting rod. The biopsy needle limiting rod is stably slidably connected to the swinging stabilizing component through the limiting slider. Stabilizing grooves are respectively installed on the outer sides of the angle detection components. A sliding plate is slidably installed in the stabilizing grooves. The bottom of the sliding plate is fixedly connected to the lifting block. The lifting of the lifting block drives the sliding plate to lift along the stabilizing grooves. The sliding of the sliding plate along the stabilizing grooves improves the lifting stability of the lifting block, the angle detection components, the biopsy needle angle adjustment component, and the biopsy needle limiting rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 FIG. 1 is a schematic perspective view of the overall structure of a device according to a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0032] Figure 2 FIG. 2 is a schematic view of the base of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0033] Figure 3 FIG. 3 is a schematic view of the moving structure of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0034] Figure 4Schematic diagram of the moving angle monitoring structure of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0035] Figure 5 Schematic diagram of the biopsy needle rotation stability of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0036] Figure 6 Schematic diagram of the biopsy needle rotation limit of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0037] Figure 7 Overall top view of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0038] Figure 8 Enlarged view of the structure at position A of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0039] Figure 9 Schematic diagram of the angle monitoring of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0040] Figure 10 Overall side view of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0041] Figure 11 Schematic diagram of the moving linkage structure of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention;

[0042] Figure 12 Side view of the moving linkage structure of a preferred embodiment of an angle locator for ablation biopsy needle puncture under CT guidance according to the present invention.

[0043] In the figure: 1. Base; 2. Moving block; 3. Stable sliding rod; 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. Stable groove; 13. Angle detection part; 14. Fixed laser; 15. Angle marking groove; 16. Rotating laser; 17. Swing groove; 18. Swing stabilizing part; 19. Biopsy needle limiting rod; 20. Biopsy needle placement groove; 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. Swing driving part; 29. Biopsy needle fixing part; 30. Limiting block; 31. Main gear; 32. First driven gear; 33. Second driven gear. Detailed implementation mode

[0044] To make the technical solutions of the present invention clearer and more definite to those skilled in the art, the present invention will be further described in detail below in conjunction with the embodiments and the accompanying drawings, but the implementation modes of the present invention are not limited thereto.

[0045] As Figure 1 - Figure 12 shown, an angle locator for ablation biopsy needle puncture under CT guidance provided in this embodiment includes a biopsy needle limiting rod 19 for limiting the biopsy needle. A biopsy needle placement groove 20 is formed through the middle of the biopsy needle limiting rod 19;

[0046] A biopsy needle fixing part 29 is clamped and installed in the biopsy needle placement groove 20. An alignment laser 21 is installed around the outer circle of the biopsy needle placement groove 20. The bottom of the biopsy needle limiting rod 19 is fixedly installed with the bed body by a moving positioning mechanism. The biopsy needle limiting rod 19 is swingably installed on a limiting driving mechanism. The limiting driving mechanism is rotationally connected to an angle detection mechanism. A pushing mechanism is installed at the bottom of the angle detection mechanism.

[0047] The moving positioning mechanism includes a moving block 2, a stable sliding rod 3, a rotating rod 4, a driving part 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 first driven gear 32 and a second driven gear 33;

[0048] The biopsy needle limiting rod 19 is fixedly connected by a base 1. Stable sliding rods 3 are fixedly installed on both sides inside 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 stable sliding rod 3 and the rotating rod 4. The stable sliding 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 installed at both ends of the rotating rod 4;

[0049] On both sides of the main gear 31, there are engaged with a first driven gear 32 and a second driven gear 33 respectively. An anti-threaded screw 8 is installed at the outer end of the second driven gear 33, and a normal-threaded screw 7 is installed at the outer end of the first driven gear 32. A cushion 6 is rotatably installed inside the normal-threaded screw 7 and the anti-threaded screw 8 respectively. A driving member 5 is installed on the base 1, and the output end of the driving member 5 is rotatably connected to the rotating rod 4.

[0050] The limit driving mechanism includes a biopsy needle angle adjusting member 25, a swing groove 17, a swing stabilizing member 18, an angle adjusting driving member 26 and a swing driving member 28;

[0051] The biopsy needle limiting rod 19 is swingably installed in the swing groove 17 on the biopsy needle angle adjusting member 25. A swing driving member 28 is installed on one side of the swing groove 17, and the output end of the swing driving member 28 is drivingly connected to the biopsy needle limiting rod 19. Swing stabilizing members 18 are installed on both sides inside the swing groove 17. A limiting slider 27 is slidably installed inside the swing stabilizing member 18, and the other end of the limiting slider 27 is fixedly connected to the biopsy needle limiting rod 19. The biopsy needle angle adjusting member 25 is drivingly connected by the angle adjusting driving member 26.

[0052] The angle detection mechanism includes an angle detection member 13, a fixed laser 14, an angle marking groove 15, and a rotating laser 16;

[0053] Both sides of the biopsy needle angle adjusting member 25 are covered with the angle detection member 13. An angle marking groove 15 is provided in a circular pattern on the outer ring of the angle detection member 13. An inner angle scanning member 24 corresponding to the angle marking groove 15 is provided on the biopsy needle angle adjusting member 25. Fixed lasers 14 are installed on both sides of the axis of the angle detection member 13. Rotating lasers 16 are installed on the inner angle scanning members 24 on both sides of the biopsy needle angle adjusting member 25.

[0054] The pushing mechanism includes a lifting driving member 9, a lifting block 10, a sliding plate 11, a stabilizing groove 12 and a limiting block 30. Stabilizing grooves 12 are respectively installed on the angle detection member 13. A limiting block 30 is fixedly installed in the stabilizing groove 12 on the angle detection member 13. A sliding plate 11 is slidably installed in the stabilizing groove 12. A lifting block 10 is installed at the bottom of the sliding plate 11, and a lifting driving member 9 is installed at the bottom of the lifting block 10.

[0055] The normal-threaded screw 7 and the anti-threaded screw 8 push the cushion 6 to move outwards.

[0056] The driving member 5 drives the rotating rod 4 and the main gear 31 to rotate, and the main gear 31 drives the first driven gear 32 and the second driven gear 33 to be rotationally connected.

[0057] The biopsy needle limiting rod 19 is swingably connected by the limiting slider 27 along the swing stabilizing member 18 inside the biopsy needle angle adjusting member 25.

[0058] The biopsy needle angle adjuster 25 is rotatably connected along the angle detector 13, and the inner angle scanner 24 is used in cooperation with the angle identification groove 15.

[0059] The slide plate 11 on the lifting block 10 is slidably connected along the stable groove 12, and the slide plate 11 is limited by the limit block 30.

[0060] The lifting drive member 9 pushes the lifting block 10 and the angle detector 13 to be liftably connected.

[0061] As Figure 1 - Figure 12 shown, the working process of an angle locator for ablation biopsy needle puncture under CT guidance provided in this embodiment is as follows: Connect the device to the power supply, drive the rotating rod 4 to rotate by starting the angle identification groove 15. During the rotation of the rotating rod 4, drive the moving block 2 to move along the stable sliding rod 3 and the rotating rod 4 in the base 1. During the movement, drive the first driven gear 32 and the second driven gear 33 to be linked through the main gear 31 at the outer end of the rotating rod 4, drive the positive screw 7 and the reverse screw 8 to rotate. During the rotation of the positive screw 7 and the reverse screw 8, push the cushion 6 to extend outwards to be fixed at the bed position. After the base 1 is fixed, start the fixed laser 14, the rotating laser 16 and the alignment laser 21. After the laser is turned on, drive the biopsy needle angle adjuster 25 to rotate along the angle detector 13 through the drive member, drive the biopsy needle limiting rod 19 to swing back and forth through the swing drive member 28. During the rotation of the angle identification groove 15, cooperate with the fixed laser 14 on the angle detector 13 to focus, accurately measure the focus point, realize multi-directional angle adjustment, automatically and accurately measure the rotation angle during the adjustment process, the angle of the biopsy needle can be swung separately, and during the swing process, it is reinforced through the swing stabilizer 18, the slide plate 11 and the stable groove 12. Push the lifting block 10 to adjust the height through the lifting drive member 9, and perform lateral movement through the moving block 2, the stable sliding rod 3 and the rotating rod 4. This device can realize the function of moving and focusing in the X, Y, and Z axes.

[0062] Example 1: As Figure 1 , Figure 11 and Figure 12As shown, stabilizing slide rods 3 and rotating rods 4 are distributed inside the base 1. 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. By the rotation of the rotating rod 4, the moving block 2 is driven to move horizontally. During the rotation of the rotating rod 4, the moving block 2 is driven to move along the stabilizing slide rod 3 and the rotating rod 4 inside the base 1. During the moving process, the main gear 31 at the outer end of the rotating rod 4 drives the driven gear one 32 and the driven gear two 33 to be linked, driving the positive-thread screw 7 and the negative-thread screw 8 to rotate. During the rotation of the positive-thread screw 7 and the negative-thread screw 8, the cushion 6 is pushed to extend outwards for fixation, realizing the function of being fixable during the moving process and realizing the double-linkage function. The cushion 6 can also be rotated manually to move outwards and inwards, realizing the function of automatic movement.

[0063] Embodiment 2: As Figure 1 - Figure 12 shown, a lifting block 10 is installed on the moving block 2. Angle detection members 13 are respectively installed on both sides of the lifting block 10. Angle marking grooves 15 are opened on the angle detection members 13. A fixed laser 14 is installed in the middle of the angle detection members 13. A biopsy needle angle adjustment member 25 is rotatably installed inside the angle detection members 13. An inner angle scanning member 24 is installed on the biopsy needle angle adjustment member 25. A rotating laser 16 is installed on the inner angle scanning member 24. During the swinging process of the biopsy needle angle adjustment member 25, the rotating laser 16 cooperates with the fixed laser 14 to realize the focusing function. By using the inner angle scanning member 24 in cooperation with the angle marking grooves 15, the rotation angle of the biopsy needle angle adjustment member 25 during rotation is measured, improving the rotation accuracy and enabling rapid focusing.

[0064] Embodiment 3: As Figure 1 - Figure 12 shown, a biopsy needle limiting rod 19 is swingably installed in a swing groove 17 on the biopsy needle angle adjustment member 25. A biopsy needle fixing member 29 that can move towards each other is installed inside the biopsy needle limiting rod 19. The biopsy needle fixing member 29 can clamp the biopsy needle. A swing driving member 28 is installed on the biopsy needle angle adjustment member 25. The swing 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 cooperation with the biopsy needle placement groove 20. By corresponding connection of the alignment laser 21 with the focal points of the fixed laser 14 and the rotating laser 16, the function of individually adjusting the biopsy needle is realized.

[0065] Embodiment 4: As Figure 1 - Figure 12As shown, a swing stabilizer 18 is installed on the biopsy needle angle adjuster 25. A limit slider 27 is slidably installed in the swing stabilizer 18. The limit slider 27 is fixedly connected to the biopsy needle limit rod 19. The biopsy needle limit rod 19 is stably slidably connected to the swing stabilizer 18 through 27. Stable grooves 12 are respectively installed on the outer side of the angle detector 13. A slide plate 11 is slidably installed in the stable grooves 12. The bottom of the slide plate 11 is fixedly connected to the lifting block 10. The lifting of the lifting block 10 drives the slide plate 11 to lift along the stable grooves 12. The sliding of the slide plate 11 along the stable grooves 12 improves the lifting stability of the lifting block 10, the angle detector 13, the biopsy needle angle adjuster 25 and the biopsy needle limit rod 19.

[0066] As mentioned above, the above are only further embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the scope disclosed by the present invention, according to the technical solution and concept of the present invention, makes equivalent substitutions or changes, all belong to the protection scope of the present invention.

Claims

1. An angle locator for ablation biopsy needle puncture under CT guidance, comprising a biopsy needle limiting rod (19) for limiting the biopsy needle. A biopsy needle placement groove (20) is formed through the middle of the biopsy needle limiting rod (19); It is characterized in that: 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 circle of the biopsy needle placement groove (20). The bottom of the biopsy needle limiting rod (19) is fixedly installed on the bed body by a moving positioning mechanism. The biopsy needle limiting rod (19) is swingably installed on a limiting driving mechanism. The limiting driving mechanism is rotationally connected to an angle detection mechanism. A pushing mechanism is installed at the bottom of the angle detection mechanism; The moving positioning mechanism includes 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 reverse screw (8), a driving hole (22), a moving hole (23), a main gear (31), a first driven gear (32) and a second driven gear (33); The biopsy needle limiting rod (19) is fixedly connected by a base (1). Stabilizing slide rods (3) are fixedly installed on both sides inside 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 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 installed at both ends of the rotating rod (4); A first driven gear (32) and a second driven gear (33) are respectively meshed on both sides of the main gear (31). A reverse screw (8) is installed at the outer end of the second driven gear (33). A positive screw (7) is installed at the outer end of the first driven gear (32). Cushions (6) are rotatably installed inside the positive screw (7) and the reverse screw (8). A driving member (5) is installed on the base (1). The output end of the driving member (5) is rotationally connected to the rotating rod (4); The limiting driving mechanism includes a biopsy needle angle adjusting member (25), a swing groove (17), a swing stabilizing member (18), an angle adjusting driving member (26) and a swing driving member (28); The biopsy needle limiting rod (19) is swingably installed in the swing groove (17) on the biopsy needle angle adjusting member (25). 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 limiting rod (19). Swing stabilizing members (18) are respectively installed on both sides inside the swing groove (17). A limiting slider (27) is slidably installed inside the swing stabilizing member (18). The other end of the limiting slider (27) is fixedly connected to the biopsy needle limiting rod (19). The biopsy needle angle adjusting member (25) is drivingly connected by an angle adjusting driving member (26); The angle detection mechanism includes an angle detection member (13), a fixed laser (14), an angle marking groove (15), a rotating laser (16); On both sides of the biopsy needle angle adjuster (25), there are angle detectors (13) covering. An angle identification groove (15) is provided around the outer ring of the angle detector (13). An inner angle scanner (24) corresponding to the angle identification groove (15) is provided on the biopsy needle angle adjuster (25). Fixed lasers (14) are respectively installed on both sides of the axis of the angle detector (13). Rotating lasers (16) are installed on the inner angle scanners (24) on both sides of the biopsy needle angle adjuster (25).

2. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 1, characterized in that: The pushing mechanism includes a lifting drive (9), a lifting block (10), a sliding plate (11), a stabilizing groove (12) and a limiting block (30). Stabilizing grooves (12) are respectively installed on the angle detector (13). The limiting block (30) is fixedly installed in the stabilizing groove (12) on the angle detector (13). The sliding plate (11) is slidably installed in the stabilizing groove (12). The lifting block (10) is installed at the bottom of the sliding plate (11). The lifting drive (9) is installed at the bottom of the lifting block (10).

3. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 1, characterized in that: The positive screw (7) and the reverse screw (8) push the abutting pad (6) to move outwards.

4. The angle locator for ablation biopsy needle puncture under CT guidance according to claim 1, characterized in that: The drive (5) drives the rotating rod (4) and the main gear (31) to rotate, and the main gear (31) drives the first driven gear (32) and the second driven gear (33) to be rotationally connected.

5. A kind of angle locator for ablation biopsy needle puncture under CT guidance according to claim 1, characterized in that: The biopsy needle limiting rod (19) is swing-connected by the limiting slider (27) along the swing stabilizing member (18) inside the biopsy needle angle adjuster (25).

6. The angle locator for puncturing an ablation biopsy needle under CT guidance according to claim 5, wherein: The biopsy needle angle adjuster (25) is rotationally connected along the angle detector (13), and the inner angle scanner (24) is used in cooperation with the angle identification groove (15).

7. An angle locator for ablation biopsy needle puncture under CT guidance according to claim 2, characterized in that: The sliding plate (11) on the lifting block (10) is slidably connected along the stabilizing groove (12), and the sliding plate (11) is limited by the limiting block (30).

8. The angle locator for puncturing an ablation biopsy needle under CT guidance according to claim 2, wherein: The lifting drive (9) pushes the lifting block (10) and the angle detector (13) to be lift-connected.

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