A positioning device for puncture needle

Abstract

The present invention belongs to the field of medical technology, specifically a positioning device for a puncture needle, including a base, a support plate fixed on one side of the base, a lifting plate connected to one side wall of the support plate, a first adjustment component connected to the upper side of one side wall of the lifting plate, a second adjustment component connected to the bottom of the first adjustment component, a third adjustment component connected to the outer end of the second adjustment component, and a positioning tube installed on the third adjustment component. The present invention can drive the positioning tube to adjust the angle in all directions through the first adjustment component and the second adjustment component, so that the positioning tube can be aligned with the puncture site, and the angle of the positioning tube can also accurately correspond to the puncture angle, and then the positioning tube is used to limit the puncture needle, and the puncture is performed when the positioning tube is limited, thereby improving the accuracy of the needle insertion, which is conducive to avoiding the deviation of the puncture needle.

Description

Technical Field

[0001] The invention relates to the field of medical technology, in particular to a positioning device for a puncture needle. Background Art

[0002] Paracentesis refers to a surgical technique that uses different special puncture needles to pierce into body cavities, organs or blood vessels under strict sterilization conditions to extract fluids, tissues or inject drugs. Its role is that on the one hand, it can help diagnose diseases by visual observation, laboratory or pathological examination of the contents of the puncture; on the other hand, puncture fluid decompression or injection of therapeutic drugs can assist in the treatment of diseases.

[0003] Existing doctors perform puncture operations manually under the CT environment. The staff holds the puncture needle and inserts it directly from the outside of the patient's body to the lesion area. However, in the actual operation, the doctor's hand stability is required to be high, and the puncture needs to be inserted slowly and accurately. However, the staff only performs the puncture operation by naked eye observation, which may cause the puncture position to deviate, which may easily cause damage to other tissues in the patient's body. In addition, the insertion speed is too fast during the puncture process, which may cause excessive puncture, thus affecting the effect of the puncture operation. To this end, we propose a positioning device for the puncture needle. Summary of the invention

[0004] The purpose of the present invention is to provide a puncture needle positioning device, which solves the problem proposed in the background technology that the puncture position is offset when the staff performs the puncture operation only by visual observation, which is easy to cause damage to other tissues in the patient's body, and the insertion speed is too fast during the puncture process, which may cause excessive puncture.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a positioning device for a puncture needle, comprising a base, a support plate fixed to one side of the base, a lifting plate connected to one side wall of the support plate, a first adjustment component connected to the upper side of one side wall of the lifting plate, a second adjustment component connected to the bottom of the first adjustment component, and a third adjustment component connected to the outer end of the second adjustment component;

[0006] The third adjustment component includes a movable plate, an outer wall of the movable plate is provided with a strip groove, a second screw is rotatably installed in the inner cavity of the strip groove, a second servo motor is fixed to one end of the movable plate, a transmission shaft of the second servo motor movably passes through the end surface of the movable plate and is fixedly connected to one end of the second screw, an outer wall of the second screw is sleeved with an adaptive second screw slider, an outer wall of the second screw slider is fixedly connected to a connecting block, and the outer end of the connecting block is connected to a positioning tube.

[0007] By adopting the above technical solution, the device is transferred to the patient's operating bed, and the lifting plate is used to drive the positioning tube to lift and lower to adjust the height. The first adjustment component is then used to drive the positioning tube to move laterally. The second adjustment component then drives the positioning tube to rotate and adjust the direction and needle insertion angle. The puncture needle is then passed through the positioning tube and inserted under the condition that the positioning tube is limited, thereby improving the accuracy of needle insertion and helping to avoid the deviation of the puncture needle.

[0008] As a preferred embodiment of the present invention, a second limiting groove is opened on one side wall of the positioning tube, a matching second limiting slide is inserted into the inner cavity of the second limiting groove, a spring is fixed to one side wall of the second limiting slide, the outer end of the spring is fixedly connected to one side wall of the inner cavity of the limiting groove, and a pressure switch is fixed to the other side wall of the inner cavity of the limiting groove.

[0009] By adopting the above technical solution, the pressure switch and the third adjusting component are electrically connected. When the puncture needle is inserted into the positioning tube for needle insertion, the puncture needle and the positioning tube will move at the same time, so that the second limit slider slides upward in the limit slide groove, thereby pulling the spring, thereby forming a certain resistance to the medical staff holding the needle, thereby avoiding the needle from being inserted too quickly and ensuring stable needle insertion. After the positioning tube moves to a certain distance, the second limit slider will pressurize the pressure switch. At this time, the pressure switch will start the movement of the third adjusting component. At this time, the second screw slider will drive the second limit slider to move in the opposite direction, thereby releasing the spring, and the distance that the second screw slider moves each time is constant. When it moves into place, the person pushes the puncture needle again for needle insertion, so that the medical staff can insert the needle at a certain distance during the needle insertion process, thereby avoiding excessive puncture caused by too fast needle insertion, and further improving the accuracy of puncture.

[0010] As a preferred embodiment of the present invention, the first adjustment component includes a transverse plate, which is fixedly connected to a lifting plate, a strip hole is opened on the top of the transverse plate, a first screw rod is rotatably installed in the strip hole, an outer wall of the first screw rod is provided with an adaptable first screw rod slider, a first servo motor is fixedly installed at one end of the transverse plate, a transmission shaft of the first servo motor movably passes through the end surface of the transverse plate and is fixedly connected to one end of the first screw rod, and the bottom of the first screw rod slider is connected to the second adjustment component.

[0011] By adopting the above technical solution, the first servo motor drives the first screw to rotate, thereby driving the first screw slider to move, thereby driving the second adjustment component to move horizontally, and then driving the positioning tube to adjust the position horizontally.

[0012] As a preferred embodiment of the present invention, the second adjustment component includes a fixed column, the top of the fixed column is fixedly connected to the bottom of the first screw slider, the bottom of the fixed column is embedded with a third servo motor, the outer end of the transmission shaft of the third servo motor is fixedly connected to the first turntable, the bottom of the first turntable is fixed with a connecting block, the outer end of the connecting block is embedded with a fourth servo motor, the outer end of the transmission shaft of the fourth servo motor is fixedly connected to the second turntable, and the outer wall of the second turntable is fixedly connected to the movable plate.

[0013] By adopting the above technical solution, the third servo motor drives the first turntable to rotate, and then cooperates with the fourth servo motor to drive the second turntable to rotate, thereby realizing all-round angle adjustment of the positioning tube, so that the direction and angle of the needle insertion can be accurately positioned.

[0014] As a preferred embodiment of the present invention, a first limiting slide groove is opened on one side wall of the support plate, a matching first limiting slide groove is inserted into the inner cavity of the first limiting slide groove, an electric push rod is fixedly connected to the top of the first limiting slide groove, the outer end of the electric push rod is fixedly connected to the top of the inner cavity of the first limiting slide groove, and the outer wall of the first limiting slide groove is fixedly connected to the corresponding side wall of the lifting plate.

[0015] By adopting the above technical solution, the electric push rod drives the first limit slider to move up and down in the first limit slide groove, thereby driving the lifting plate to move up and down, and further driving the positioning tube to adjust the height.

[0016] As a preferred embodiment of the present invention, both side walls of the lifting plate are fixedly connected to a frame, a clamp is provided in the inner cavity of the frame, a bolt is threaded through the top of the frame, and the tail end of the bolt is rotatably connected to the top of the clamp.

[0017] By adopting the above technical solution, when the device is transferred to the operating bed, the frame is sleeved on the bedside, and then the rotating bolt can drive the clamp to clamp on the bedside, so that the overall stability of the device is high.

[0018] As a preferred embodiment of the present invention, the bottom of the clamping plate and the bottom of the inner cavity of the frame are both glued with matching rubber pads.

[0019] As a preferred embodiment of the present invention, a controller is fixedly mounted on the outer wall of the support plate.

[0020] By adopting the above technical solution, the controller is a PLC controller, and the control program is set in advance, so as to control the second servo motor to drive the second screw slider to move a fixed distance.

[0021] As a preferred embodiment of the present invention, a handle is fixed to the outer wall of the support plate.

[0022] As a preferred embodiment of the present invention, locking universal wheels are fixed at the four corners of the bottom of the base.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention can drive the positioning tube to adjust the angle in all directions through the first adjustment component and the second adjustment component, so that the positioning tube can be aligned with the puncture site, and the angle of the positioning tube can also accurately correspond to the puncture angle, and then the positioning tube is used to limit the puncture needle, and the puncture is performed under the condition of the positioning tube being limited, thereby improving the accuracy of the needle insertion and facilitating the avoidance of the deviation of the puncture needle;

[0025] When the puncture needle is inserted into the positioning tube and the needle is inserted, the puncture needle and the positioning tube will move at the same time and pull the spring, thereby forming a certain resistance to the medical staff holding the needle, thereby avoiding the needle from being inserted too quickly and ensuring stable needle insertion. After the positioning tube moves to a certain distance, it will apply pressure to the pressure switch. At this time, the pressure switch will start the movement of the third adjustment component to release the spring, and then insert the needle again, so that the medical staff can insert the needle at a certain distance during the needle insertion process, thereby avoiding excessive puncture caused by too fast needle insertion, and further improving the accuracy of puncture. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Other features, objects and advantages of the present invention will become more apparent from the detailed description of non-limiting embodiments made with reference to the following drawings:

[0027] Figure 1 It is a schematic diagram of the overall structure of a positioning device for a puncture needle of the present invention;

[0028] Figure 2 This is a schematic diagram of the disassembled structure of the support plate and the lifting plate of a positioning device for a puncture needle according to the present invention;

[0029] Figure 3 It is a schematic structural diagram of a second adjustment component of a positioning device for a puncture needle according to the present invention;

[0030] Figure 4 The present invention is a schematic diagram of the cross-sectional structure of a positioning tube of a positioning device for a puncture needle.

[0031] In the figure:

[0032] 1. Base; 11. Locking universal wheel;

[0033] 2. Support plate; 21. Lifting plate; 22. Handle; 23. Frame; 24. Clamp; 25. Bolt; 26. First limit slider; 27. Electric push rod; 28. Controller;

[0034] 3. horizontal plate; 31. first servo motor; 32. first screw rod; 33. first screw rod slider;

[0035] 4. Fixed column; 41. First turntable; 42. Connecting block; 43. Second turntable; 44. Third servo motor; 45. Fourth servo motor;

[0036] 5. movable plate; 51. second servo motor; 52. second screw rod; 53. second screw rod slider; 54. positioning tube; 55. second limit slider; 56. spring; 57. pressure switch. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected or set, or detachably connected or set, or connected or set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances. The models of electrical appliances provided in the present invention are only for reference, and different models of electrical appliances with the same functions can be replaced according to actual usage.

[0040] See also Figure 1-4 The present invention provides a technical solution: a positioning device for a puncture needle, comprising a base 1, a support plate 2 is fixed to one side of the base 1, a side wall of the support plate 2 is connected to a lifting plate 21, a first adjustment component is connected to the upper side of a side wall of the lifting plate 21, a second adjustment component is connected to the bottom of the first adjustment component, and a third adjustment component is connected to the outer end of the second adjustment component;

[0041] The third adjustment component includes a movable plate 5, the outer wall of the movable plate 5 is provided with a strip groove, the inner cavity of the strip groove is rotatably mounted with a second screw rod 52, one end of the movable plate 5 is fixed with a second servo motor 51, the transmission shaft of the second servo motor 51 movably passes through the end surface of the movable plate 5 and is fixedly connected to one end of the second screw rod 52, the outer wall of the second screw rod 52 is sleeved with an adapted second screw rod slider 53, the outer wall of the second screw rod slider 53 is fixedly connected with a connecting block, and the outer end of the connecting block is connected with a positioning tube 54;

[0042] In the prior art, when performing puncture on a patient, the medical staff often manually inserts the needle, and the direction of the needle is controlled by feel during the insertion process, which can easily lead to needle position deviation. The present embodiment can solve the above problem, and is specifically implemented as follows: first, the device is transferred to the patient's operating bed, and the lifting plate 21 is used to drive the positioning tube 54 to lift and adjust the height, and then the first adjustment component is used to drive the positioning tube 54 to move horizontally, and then the second adjustment component drives the positioning tube 54 to rotate and adjust the direction and the insertion angle of the needle, and then the puncture needle is passed through the positioning tube 54 and the positioning tube 54 is limited to perform the needle insertion, thereby improving the accuracy of the needle insertion and helping to avoid the deviation of the puncture needle.

[0043] Furthermore, locking universal wheels 11 are fixed at the four corners of the bottom of the base 1. The arrangement of the locking universal wheels 11 makes it convenient to transfer and reposition the entire device.

[0044] Furthermore, a handle 22 is fixed to the outer wall of the support plate 2. The arrangement of the handle 22 enables a worker to hold the handle 22 and conveniently push the entire device to move.

[0045] like Figure 1 and 4 As shown; a second limiting slot is provided on one side wall of the positioning tube 54, a second limiting slider 55 is inserted into the inner cavity of the second limiting slot, a spring 56 is fixed to one side wall of the second limiting slider 55, an outer end of the spring 56 is fixedly connected to one side wall of the inner cavity of the limiting slot, and a pressure switch 57 is fixed to the other side wall of the inner cavity of the limiting slot;

[0046] In actual use, the pressure switch 57 is electrically connected to the third adjusting component. When the puncture needle is inserted into the positioning tube 54, the puncture needle and the positioning tube 54 will move at the same time, so that the second limit slider 55 slides upward in the limit slide groove, thereby pulling the spring 56, thereby forming a certain resistance to the medical staff holding the needle, thereby avoiding the needle from being inserted too quickly and ensuring stable needle insertion. After the positioning tube 54 moves to a certain distance, the second limit slider 55 will apply pressure to the pressure switch 57. At this time, the pressure switch 57 will start the movement of the third adjusting component. At this time, the second screw slider 53 will drive the second limit slider 55 to move in the opposite direction, thereby releasing the spring 56, and the distance that the second screw slider 53 moves each time is constant. When it moves into place, the person pushes the puncture needle again for insertion, so that the medical staff can insert the needle at a certain distance during the insertion process, thereby avoiding excessive puncture caused by excessive insertion of the needle, and further improving the accuracy of puncture.

[0047] Furthermore, a controller 28 is fixedly mounted on the outer wall of the support plate 2. The controller 28 is a PLC controller, and a control program is set in advance, so as to control the second servo motor 51 to drive the second screw slider 53 to move a fixed distance.

[0048] like Figure 1 As shown; the first adjustment component includes a horizontal plate 3, the horizontal plate 3 and the lifting plate 21 are fixedly connected, a strip hole is opened on the top of the horizontal plate 3, a first screw rod 32 is rotatably installed in the strip hole, an outer wall of the first screw rod 32 is sleeved with an adapted first screw rod slider 33, a first servo motor 31 is fixedly installed at one end of the horizontal plate 3, a transmission shaft of the first servo motor 31 movably passes through the end surface of the horizontal plate 3 and is fixedly connected to one end of the first screw rod 32, and the bottom of the first screw rod slider 33 is connected to the second adjustment component;

[0049] The first servo motor 31 drives the first screw rod 32 to rotate, thereby driving the first screw rod slider 33 to move, thereby driving the second adjustment component to move horizontally, and then driving the positioning tube 54 to adjust the position horizontally.

[0050] like Figure 1 and 3 As shown; the second adjustment component includes a fixed column 4, the top of the fixed column 4 is fixedly connected to the bottom of the first screw slider 33, the bottom of the fixed column 4 is embedded with a third servo motor 44, the outer end of the transmission shaft of the third servo motor 44 is fixedly connected to the first turntable 41, the bottom of the first turntable 41 is fixed with a connecting block 42, the outer end of the connecting block 42 is embedded with a fourth servo motor 45, the outer end of the transmission shaft of the fourth servo motor 45 is fixedly connected to the second turntable 43, and the outer wall of the second turntable 43 is fixedly connected to the movable plate 5;

[0051] The third servo motor 44 drives the first turntable 41 to rotate, and then cooperates with the fourth servo motor 45 to drive the second turntable 43 to rotate, so as to achieve all-round angle adjustment of the positioning tube 54, so as to accurately position the direction and angle of the needle insertion.

[0052] like Figure 1 and 2 As shown, a first limiting slide groove is provided on one side wall of the support plate 2, an adapted first limiting slide block 26 is inserted into the inner cavity of the first limiting slide groove, an electric push rod 27 is fixedly connected to the top of the first limiting slide groove, an outer end of the electric push rod 27 is fixedly connected to the top of the inner cavity of the first limiting slide groove, and an outer wall of the first limiting slide block 26 is fixedly connected to the corresponding side wall of the lifting plate 21;

[0053] The electric push rod 27 drives the first limit slider 26 to move up and down in the first limit slide groove, thereby driving the lifting plate 21 to move up and down, and further driving the positioning tube 54 to adjust the height.

[0054] like Figure 1 As shown, both side walls of the lifting plate 21 are fixedly connected with a frame 23, the inner cavity of the frame 23 is provided with a clamping plate 24, the top thread of the frame 23 is penetrated by a bolt 25, and the tail end of the bolt 25 is rotatably connected with the top of the clamping plate 24;

[0055] When the device is transferred to the operating bed, the frame 23 is placed on the bedside, and then the bolt 25 is rotated to drive the clamping plate 24 to clamp on the bedside, so that the overall stability of the device is high.

[0056] Furthermore, the bottom of the clamping plate 24 and the bottom of the inner cavity of the frame 23 are both glued with matching rubber pads, and the provision of the rubber pads further improves the clamping stability.

[0057] The implementation principle of the positioning device of the puncture needle of the present application is as follows: first, the device is transferred to the patient's operating bed, and the lifting plate 21 is used to drive the positioning tube 54 to lift and adjust the height, and then the first servo motor 31 drives the first screw rod 32 to rotate, thereby driving the first screw rod slider 33 to move, thereby driving the second adjustment component to move horizontally, and then driving the positioning tube 54 to adjust the position horizontally, and the third servo motor 44 drives the first turntable 41 to rotate, and then cooperates with the fourth servo motor 45 to drive the second turntable 43 to rotate, so as to realize the omni-directional angle adjustment of the positioning tube 54, so that the direction and angle of the needle insertion are accurately positioned, and then the puncture needle is passed through the positioning tube 54 and inserted when the positioning tube 54 is limited, thereby improving the accuracy of the needle insertion, which is conducive to avoiding the deviation of the puncture needle. When the needle is inserted into the positioning tube 54, the puncture needle and the positioning tube 54 will move at the same time, so that the second limit slider 55 slides upward in the limit slider groove, thereby pulling the spring 56, thereby forming a certain resistance to the medical staff holding the needle, thereby avoiding the needle from being inserted too quickly and ensuring stable needle insertion. After the positioning tube 54 moves to a certain distance, the second limit slider 55 will apply pressure to the pressure switch 57. At this time, the pressure switch 57 will start the movement of the third adjustment component. At this time, the second screw slider 53 will drive the second limit slider 55 to move in the opposite direction, thereby releasing the spring 56, and the distance that the second screw slider 53 moves each time is constant. When it moves into place, the person pushes the puncture needle again for insertion, so that the medical staff can insert the needle at a certain distance during the insertion process, thereby avoiding excessive puncture caused by too fast insertion of the needle, and further improving the accuracy of puncture.

[0058] In addition, the components included in the positioning device of a puncture needle of the present invention are all universal standard parts or components known to technical personnel in this field. The structure and principle thereof can be known to technical personnel in this field through technical manuals or through conventional experimental methods. In the idle part of the device, all the above-mentioned electrical components, which refer to power elements, electrical components, and adapted monitoring computers and power supplies, are connected through wires. The specific connection means should refer to the following working principle. The electrical connection is completed in the working order of each electrical component. The detailed connection means are well-known technologies in this field. The following mainly introduces the working principle and process, and no longer explains the electrical control.

[0059] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0060] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A puncture needle positioning device, comprising a base (1), characterized in that: A support plate (2) is fixed to one side of the base (1); a side wall of the support plate (2) is connected to a lifting plate (21); an upper side of a side wall of the lifting plate (21) is connected to a first adjustment component; a bottom of the first adjustment component is connected to a second adjustment component; and an outer end of the second adjustment component is connected to a third adjustment component; The third adjustment component comprises a movable plate (5), the outer wall of the movable plate (5) is provided with a strip groove, a second screw rod (52) is rotatably installed in the inner cavity of the strip groove, a second servo motor (51) is fixed to one end of the movable plate (5), a transmission shaft of the second servo motor (51) movably passes through the end surface of the movable plate (5) and is fixedly connected to one end of the second screw rod (52), an outer wall of the second screw rod (52) is sleeved with an adaptive second screw rod slider (53), the outer wall of the second screw rod slider (53) is fixedly connected with a connecting block, and the outer end of the connecting block is connected to a positioning tube (54).

2. A puncture needle positioning device according to claim 1, characterized in that: A second limiting groove is provided on one side wall of the positioning tube (54), a second limiting slide block (55) is inserted into the inner cavity of the second limiting groove, a spring (56) is fixed to one side wall of the second limiting slide block (55), an outer end of the spring (56) is fixedly connected to one side wall of the inner cavity of the limiting groove, and a pressure switch (57) is fixed to the other side wall of the inner cavity of the limiting groove.

3. A puncture needle positioning device according to claim 1, characterized in that: The first adjustment component comprises a transverse plate (3), the transverse plate (3) and the lifting plate (21) are fixedly connected, a strip hole is opened on the top of the transverse plate (3), a first screw rod (32) is rotatably installed in the strip hole, an outer wall of the first screw rod (32) is sleeved with an adapted first screw rod slider (33), a first servo motor (31) is fixedly installed at one end of the transverse plate (3), a transmission shaft of the first servo motor (31) movably passes through the end surface of the transverse plate (3) and is fixedly connected to one end of the first screw rod (32), and the bottom of the first screw rod slider (33) is connected to the second adjustment component.

4. A puncture needle positioning device according to claim 3, characterized in that: The second adjustment component comprises a fixed column (4), the top of the fixed column (4) is fixedly connected to the bottom of the first screw slider (33), the bottom of the fixed column (4) is embedded with a third servo motor (44), the outer end of the transmission shaft of the third servo motor (44) is fixedly connected to the first turntable (41), the bottom of the first turntable (41) is fixed with a connecting block (42), the outer end of the connecting block (42) is embedded with a fourth servo motor (45), the outer end of the transmission shaft of the fourth servo motor (45) is fixedly connected to the second turntable (43), and the outer wall of the second turntable (43) is fixedly connected to the movable plate (5).

5. A puncture needle positioning device according to claim 1, characterized in that: A first limiting slide groove is provided on one side wall of the support plate (2), a first limiting slide groove is inserted with an adaptable first limiting slider (26) in its inner cavity, an electric push rod (27) is fixedly connected to the top of the first limiting slider (26), an outer end of the electric push rod (27) is fixedly connected to the top of the inner cavity of the first limiting slide groove, and an outer wall of the first limiting slider (26) is fixedly connected to the corresponding side wall of the lifting plate (21).

6. A puncture needle positioning device according to claim 1, characterized in that: Both side walls of the lifting plate (21) are fixedly connected to a frame (23), an inner cavity of the frame (23) is provided with a clamping plate (24), a bolt (25) is threadedly passed through the top of the frame (23), and the tail end of the bolt (25) is rotatably connected to the top of the clamping plate (24).

7. A puncture needle positioning device according to claim 6, characterized in that: The bottom of the clamping plate (24) and the bottom of the inner cavity of the frame (23) are both glued with matching rubber pads.

8. A puncture needle positioning device according to claim 1, characterized in that: A controller (28) is fixedly mounted on the outer wall of the support plate (2).

9. A puncture needle positioning device according to claim 1, characterized in that: A handle (22) is fixed to the outer wall of the support plate (2).

10. A puncture needle positioning device according to claim 1, characterized in that: Locking universal wheels (11) are fixed at the four corners of the bottom of the base (1).

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