A puncture device for pharmaceutical injection test

Abstract

The application discloses a puncture device for pharmaceutical injection test and belongs to the technical field of medical devices. The puncture device comprises a support plate, a connecting pipe which is slidably connected to the support plate, a puncture needle which is installed at one end of the connecting pipe close to the support plate, a liquid storage cavity which is arranged in the connecting pipe, the liquid storage cavity of the connecting pipe being communicated with the puncture needle, symmetrically distributed connecting rods which are fixedly connected to one side of the support plate away from the connecting pipe, the axis of the symmetrically distributed connecting rods and the axis of the connecting pipe being located on the same plane, and a positioning plate which is hingedly connected to the symmetrically distributed connecting rods, and the positioning plate is provided with a through hole. In the puncture process, the positioning plate is used for extruding, stretching and pressing the skin at the puncture position of the patient, the position stability of the connecting pipe and the puncture needle is maintained, the direction guidance is provided for the connecting pipe and the puncture needle, the puncture needle is more stable in the moving process, and the stability of the puncture needle in the puncture process is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a puncture device for pharmaceutical injection test. BACKGROUND

[0002] Puncturing human tissue and injecting therapeutic solution is a common medical means, widely used in various scenarios such as disease prevention, diagnosis and treatment, especially in pharmaceutical injection test, in order to obtain reliable research data, it is usually required to use a puncture device to accurately puncture to a predetermined depth in a specific injection area of a patient, and then inject drugs.

[0003] However, some existing puncture devices often rely only on the contact between the puncture needle tip and the patient's skin for positioning when operating, which not only lacks effective guidance of the needle body's travel path, but also lacks means to stabilize and fix the puncture needle or device body in the target puncture area. This design defect is prone to cause discomfort or pain to the patient during puncture, and the patient's involuntary muscle tension, contraction or body movement due to pain will directly cause the puncture needle to deviate or vibrate. This instability factor makes it difficult to accurately control the actual puncture depth or angle, which often deviates from the preset target.

[0004] The deviation of puncture accuracy means that the drug may be injected into the wrong tissue layer, which not only directly affects the absorption rate, distribution and metabolism of the drug, but also causes significant errors in key test data such as pharmacodynamics and pharmacokinetics, seriously damaging the accuracy, reliability and comparability of the test results. SUMMARY

[0005] The present application provides a puncture device for pharmaceutical injection test, in order to solve the problems raised in the above background.

[0006] The technical solution of the present application is: a puncture device for pharmaceutical injection test, comprising a support plate, a connecting pipe is slidably connected to the support plate, a puncture needle is installed at one end of the connecting pipe close to the support plate, a liquid storage cavity is provided in the connecting pipe, the liquid storage cavity of the connecting pipe is in communication with the puncture needle, symmetrically distributed connecting rods are fixedly connected to one side of the support plate away from the connecting pipe, the axis of the symmetrically distributed connecting rods and the axis of the connecting pipe are located on the same plane, and the symmetrically distributed connecting rods are collectively hinged to a positioning plate, the positioning plate is provided with a through hole, the through hole of the positioning plate is used for passing the puncture needle, and the positioning plate is used for pressing the patient's skin.

[0007] Further, the positioning plate is provided with symmetrically distributed inclined surfaces on the side away from the support plate, and the distance between the symmetrically distributed inclined surfaces on the positioning plate decreases as the distance between them and the support plate increases.

[0008] Further illustrate, the positioning plate is slidably connected with symmetrically distributed pushing blocks, the pushing blocks are located on the corresponding inclined surfaces of the positioning plate, and the pushing blocks are used for pushing the patient's skin to move.

[0009] Further illustrate, the positioning plate is slidably connected with a positioning ring provided with an avoiding hole, the positioning ring is hingedly connected with a sliding frame, the sliding frame is slidably connected with the connecting pipe, a rough surface is arranged between the connecting pipe and the sliding frame, the connecting pipe drives the sliding frame to move through the rough surface therebetween, the positioning ring is fixedly connected with symmetrically distributed extrusion plates, one side of the pushing block close to the supporting plate is fixedly connected with a triangular block, the extrusion plates drive the pushing block to move by extruding the triangular block, and the axis of the positioning ring coincides with the axis of the through hole on the positioning plate.

[0010] Further illustrate, the pushing block is provided with a U-shaped groove away from the supporting plate.

[0011] Further illustrate, the positioning plate is hingedly connected with an adjusting rod, the supporting plate is provided with symmetrically distributed sliding grooves, the adjusting rod is slidably connected with a sliding sleeve, the sliding sleeve slides in one of the sliding grooves of the supporting plate, the positioning plate is hingedly connected with a threaded rod, the threaded rod is used for adjusting the angle of the positioning plate, the threaded rod is threadedly connected with a threaded sleeve, and the threaded sleeve slides in the other sliding groove of the supporting plate.

[0012] Further illustrate, one side of the supporting plate away from the positioning plate is rotationally connected with a threaded cylinder, the connecting pipe is spline-connected with a threaded ring, the threaded ring is threadedly connected with the threaded cylinder, and the threaded cylinder is used for adjusting the position of the threaded ring.

[0013] Further illustrate, the threaded cylinder is rotationally connected with a guide pipe, the guide pipe is slidably connected with the connecting pipe, the connecting pipe is fixedly connected with a lifting ring, the guide pipe is provided with a guide groove, the lifting ring slides in the guide groove of the guide pipe, and a spring is arranged between the lifting ring and the guide pipe.

[0014] Further illustrate, the guide pipe is provided with symmetrically distributed scale lines, and the scale lines are used for showing the position of the lifting ring.

[0015] Further illustrate, the guide pipe is fixedly connected with symmetrically distributed limiting frames, the limiting frames are made of elastic materials, and the limiting frames are used for limiting the position of the lifting ring.

[0016] Further illustrate, the limiting frames are J-shaped, and the limiting frames are provided with inclined surfaces close to the supporting plate.

[0017] Further, the elastic plate is fixed in the connecting pipe, and the elastic plate is used for shielding the communication between the liquid storage cavity of the connecting pipe and the puncture needle.

[0018] Compared with the prior art, the present application has the following advantages: 1. In the puncture process, the skin of the patient is stretched by the positioning plate, the position of the connecting pipe and the puncture needle is stable, and the direction of the connecting pipe and the puncture needle is guided, so that the puncture needle is more stable during movement, and the stability of the puncture needle during puncture is improved.

[0019] 2. The angle of the positioning plate is adjusted by the threaded rod, so that the direction of the puncture needle is changed without changing the position of the patient's skin, so that the puncture needle can puncture the patient's skin from different angles, thereby improving the applicability of the device.

[0020] 3. In the process of adjusting the position of the connecting pipe, the distance of the connecting pipe is judged by observing the position of the lifting ring on the scale line, so that the accuracy of the moving distance of the connecting pipe is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present application;

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the positioning plate, the adjusting rod and the threaded rod of the present application;

[0023] Figure 3 It is a schematic diagram of the three-dimensional structure of the pushing block, the extrusion plate and the threaded ring of the present application;

[0024] Figure 4 It is a schematic diagram of the three-dimensional structure of the spring, the limiting frame and the elastic plate of the present application;

[0025] Figure 5 It is a schematic diagram of the three-dimensional structure of the positioning ring, the sliding frame and the threaded sleeve of the present application;

[0026] Figure 6 It is a schematic diagram of the three-dimensional structure of the positioning plate, the positioning ring and the extrusion plate of the present application;

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the connecting pipe and the elastic plate of the present application.

[0028] The labels in the diagram are as follows: 1-Support plate, 2-Connecting tube, 3-Piercing needle, 4-Connecting rod, 5-Positioning plate, 6-Pushing block, 7-Positioning ring, 8-Sliding frame, 9-Extrusion plate, 10-Triangle block, 601-U-groove, 11-Adjusting rod, 12-Sliding sleeve, 13-Threaded rod, 14-Threaded sleeve, 15-Threaded cylinder, 16-Threaded ring, 17-Guide tube, 18-Lifting ring, 19-Spring, 20-Scale line, 21-Limiting frame, 22-Elastic plate. Detailed Implementation

[0029] Although the invention may be described with respect to specific applications or industries, those skilled in the art will recognize its broader applicability. Those skilled in the art will understand that terms such as "left" and "right" are used to describe the drawings and not to indicate a limitation on the scope of the invention. Any numerical designations such as "first" or "second" are merely illustrative and not intended to limit the scope of the invention in any way.

[0030] In the current puncture device, due to the lack of guidance and fixation between the puncture needle and the patient's skin, the patient's subconscious body movement caused by pain during the puncture process can cause the puncture needle to deviate or vibrate between the puncture needle and the patient's skin, resulting in reduced puncture accuracy and affecting the accuracy of the test data.

[0031] Example 1: A puncture device for pharmaceutical injection testing, such as Figures 1-7 As shown, the device includes a support plate 1, a connecting tube 2 slidably connected to the support plate 1, a puncture needle 3 installed at one end of the connecting tube 2 near the support plate 1, a fluid reservoir inside the connecting tube 2, the fluid reservoir of the connecting tube 2 communicating with the puncture needle 3, and symmetrically distributed connecting rods 4 fixedly connected to the side of the support plate 1 away from the connecting tube 2. The axes of the symmetrically distributed connecting rods 4 and the axis of the connecting tube 2 are both located on the same plane. The symmetrically distributed connecting rods 4 are hinged together to a positioning plate 5, which has a through hole for the puncture needle 3 to pass through and for squeezing the patient's skin.

[0032] Furthermore, such as Figures 1-3 and Figures 5-7 As shown, the positioning plate 5 has symmetrically distributed inclined surfaces on the side away from the support plate 1, and the distance between the symmetrically distributed inclined surfaces on the positioning plate 5 decreases as the distance between it and the support plate 1 increases.

[0033] Furthermore, such as Figures 1-3 and Figures 5-7 As shown, symmetrically distributed pusher blocks 6 are slidably connected to the positioning plate 5. The pusher blocks 6 are located on the inclined surface corresponding to the positioning plate 5 and are used to push the patient's skin to move.

[0034] The above scheme provides a way to fix the moving track of the puncture needle 3 during the puncture process, and increase the stability of the puncture needle 3 during the puncture process; the connecting pipe 2 is located at the center of the support plate 1, initially, the support plate 1 is located at the left part of the connecting pipe 2, the connecting pipe 2 can drive the puncture needle 3 to slide left relative to the support plate 1, the puncture needle 3 is located at the left part of the connecting pipe 2, the right part of the connecting pipe 2 is externally connected with a syringe through a hose, the syringe is used to deliver liquid medicine into the connecting pipe 2, the shape and size of the liquid storage cavity in the connecting pipe 2 can be adjusted according to actual conditions, the connecting rod 4 is two front and back symmetrical distribution, both are located at the left part of the support plate 1, the left end of the two connecting rods 4 is hinged with the positioning plate 5, when it is needed to inject medicine into the specified position of the patient's body, the staff first connects the syringe with the hose at the right part of the connecting pipe 2, then delivers the medicine into the connecting pipe 2 to discharge the gas in the connecting pipe 2, until the gas in the connecting pipe 2 is completely discharged, the staff presses the positioning plate 5 against the puncture area of the patient's skin, and makes the through hole of the positioning plate 5 surround the puncture part of the patient's skin, then extrudes the skin of the puncture part of the patient through the positioning plate 5, and uses the reaction force provided by the skin of the patient to make the position of the support plate 1 and the parts thereon remain stable, thereby increasing the stability of the puncture needle 3 during the puncture process; the left side of the positioning plate 5 is provided with two inclined surfaces which are symmetrically distributed upward and downward, the distance between the two inclined surfaces gradually increases from left to right, the inclined surface on the positioning plate 5 is used to drive the patient's skin to move to the surrounding, the two pushing blocks 6 are used to push the patient's skin to move to both sides, stretch the skin of the puncture part of the patient, and increase the resistance when the positioning plate 5 moves to other positions, thereby reducing the probability of change of the position of the positioning plate 5 in the process of extruding the skin of the patient.

[0035] Further, as shown in Figures 1-3 、 Figure 5 and Figure 6 , the positioning ring 7 is slidably connected to the positioning plate 5, the positioning ring 7 is provided with an avoiding hole, the positioning ring 7 is hinged with a sliding frame 8, the sliding frame 8 is slidably connected with the connecting pipe 2, a rough surface is arranged between the connecting pipe 2 and the sliding frame 8, the connecting pipe 2 drives the sliding frame 8 to move through the rough surface therebetween, the positioning ring 7 is fixedly connected with symmetrically distributed extrusion plates 9, the side of the pushing block 6 close to the support plate 1 is fixedly connected with a triangular block 10, the extrusion plate 9 drives the pushing block 6 to move by extruding the triangular block 10, the axis of the positioning ring 7 coincides with the axis of the through hole on the positioning plate 5.

[0036] Further, as shown in Figure 3 、 Figure 5 and Figure 6 , the side of the pushing block 6 away from the support plate 1 is provided with a U-shaped groove 601.

[0037] The above solution provides a way to reduce the positional deviation of the positioning plate 5; the left side of the positioning ring 7 is a gradient surface, and the thickness of the positioning ring 7 gradually decreases from its axis to its edge, which is used to ensure the fixing force of the positioning ring 7 on the skin in its central area, thereby increasing the stability of the device. The axis of the positioning ring 7 coincides with the axis of the clearance hole on it, which is used to allow space for the puncture needle 3 to move. The positioning ring 7 is located in the through hole of the positioning plate 5, the sliding frame 8 is located on the right side of the positioning ring 7, and there are two extrusion plates 9, which are symmetrically distributed on the positioning ring 7. Taking the lower extrusion plate 9 as an example. The lower part of the extrusion plate 9 is tilted to the right, and the triangular block 10 is located on the right side of the pusher block 6. The inclined surface of the triangular block 10 faces the axis of the positioning ring 7. The extrusion plate 9 pushes the pusher block 6 to move by extruding the triangular block 10. After the positioning plate 5 is stabilized, the operator pushes the connecting pipe 2 to move to the left. The connecting pipe 2 drives the sliding frame 8 to move to the left through friction. The sliding frame 8 pushes the positioning ring 7 to move to the left relative to the positioning plate 5. At this time, the positioning ring 7 drives the two extrusion plates 9 on it to move synchronously, so that the extrusion plate 9 pushes the pusher block 6 away from the positioning plate by extruding the triangular block 10. The axis of 5 is such that the pusher block 6 pushes the patient's skin, increasing the tension of the positioning plate 5 on the corresponding skin, thereby improving the stability of the positioning plate 5 on the patient's skin and reducing the probability of the positioning plate 5 pushing the skin to move. During this process, when the positioning ring 7 comes into contact with the patient's skin, the positioning ring 7 also squeezes the patient's skin, further reducing the area of ​​the uncompressed skin at the puncture site, until the positioning ring 7 can no longer move to the left relative to the positioning plate 5. Then, the connecting tube 2 drives the puncture needle 3 to move to the left relative to the sliding frame 8 to puncture the patient's skin. 3. After puncturing to the designated depth in the patient's body, the staff injects a predetermined amount of medication into the patient's body. In this article, the U-shaped groove 601 is located in the middle of the left side of the pusher block 6. It is used to reduce the pressure on the patient's blood vessels when the pusher block 6 squeezes the patient's skin. The shape of the U-shaped groove 601 can be adjusted according to the actual situation. During the process of pressing the positioning plate 5 against the puncture area of ​​the patient's skin, the staff adjusts the position of the two U-shaped grooves 601 by controlling the angle of the positioning plate 5 so that the two U-shaped grooves 601 are located at the corresponding blood vessels, thereby reducing the squeezing force on the blood vessels.

[0038] Example 2: Based on Example 1, such as Figures 1-5 As shown, the positioning plate 5 is hinged to an adjusting rod 11, the support plate 1 is provided with symmetrically distributed sliding grooves, the adjusting rod 11 is slidably connected to a sliding sleeve 12, the sliding sleeve 12 slides in one of the sliding grooves of the support plate 1, the positioning plate 5 is hinged to a threaded rod 13, the threaded rod 13 is used to adjust the angle of the positioning plate 5, the threaded rod 13 is threadedly connected to a threaded sleeve 14, the threaded sleeve 14 slides in another sliding groove of the support plate 1.

[0039] The above scheme provides a way to adjust the angle of the positioning plate 5; the adjusting rod 11 is located at the upper part of the positioning plate 5, the threaded rod 13 is located at the lower part of the positioning plate 5, initially, the left side of the positioning plate 5 is parallel to the left side of the support plate 1, the support plate 1 is provided with two sliding grooves symmetrically distributed upward and downward, the two sliding grooves on the support plate 1 are used to provide the moving space of the sliding sleeve 12 and the threaded sleeve 14 during the adjustment of the angle of the positioning plate 5, when it is necessary to adjust the angle of the puncture needle 3 according to the different positions of the patient, the staff rotates the threaded rod 13, the left end of the threaded rod 13 drives the lower part of the positioning plate 5 to move left (right), so that the positioning plate 5 rotates clockwise (counterclockwise) around the left end of the connecting rod 4, thereby changing the angle of the positioning plate 5, during this process, the upper part of the positioning plate 5 drives the adjusting rod 11 to move right (left), the threaded rod 13 and the adjusting rod 11 drive the parts thereon to move along the corresponding guide grooves on the support plate 1 and approach each other, until the positioning plate 5 is at the appropriate angle, the staff stops rotating the threaded rod 13 to complete the adjustment of the angle of the positioning plate 5.

[0040] In example 3, as shown in Figures 1-4 , the side of the support plate 1 away from the positioning plate 5 is rotationally connected with a threaded cylinder 15, the connecting pipe 2 is spline-connected with a threaded ring 16, the threaded ring 16 is threadedly connected with the threaded cylinder 15, and the threaded cylinder 15 is used to adjust the position of the threaded ring 16.

[0041] The above scheme provides a way to adjust the initial position of the connecting pipe 2; the threaded cylinder 15 is located at the right side of the support plate 1, the threaded ring 16 is located in the threaded cylinder 15, initially, the threaded ring 16 is located at the right part of the threaded cylinder 15, the threaded cylinder 15 is used to drive the threaded ring 16 to reciprocate left and right, initially, the threaded ring 16 is located at the left part of the spline on the connecting pipe 2, when different puncture needles 3 are needed to be used, the staff drives the threaded ring 16 to move left by rotating the threaded cylinder 15, the threaded ring 16 drives the connecting pipe 2 to move left, the connecting pipe 2 drives the puncture needle 3 to move left, thereby ensuring that the relative position of the left end of the puncture needle 3 to the positioning plate 5 remains unchanged when different lengths of puncture needles 3 are used, during this process, since the connecting pipe 2 will move left, after adjusting the position of the connecting pipe 2, the staff needs to push the positioning ring 7 right to ensure that the position of the positioning ring 7 and the parts thereon before use is in the initial state.

[0042] Further, as shown in Figures 1-4 , the threaded cylinder 15 is rotationally connected with a guide pipe 17, the guide pipe 17 is slidingly connected with the connecting pipe 2, the connecting pipe 2 is fixedly connected with a lifting ring 18, the guide pipe 17 is provided with a guide groove, the lifting ring 18 slides in the guide groove of the guide pipe 17, and a spring 19 is arranged between the lifting ring 18 and the guide pipe 17.

[0043] Further, as shown in Figure 1As shown in the drawings, the guide pipe 17 is provided with symmetrically distributed scale lines 20, which are used to show the position of the lifting ring 18.

[0044] Further, as shown in the drawings, Figures 1-4 The guide pipe 17 is fixed with symmetrically distributed limit racks 21, which are made of elastic material and are used to limit the position of the lifting ring 18.

[0045] Further, as shown in the drawings, Figures 1-4 The limit rack 21 is J-shaped, and the side close to the support plate 1 is provided with an inclined surface.

[0046] The above scheme provides a way to limit the moving distance of the connecting pipe 2; the guide pipe 17 is located at the right part of the threaded cylinder 15, the lifting ring 18 is located at the right part of the connecting pipe 2, and the maximum diameter of the lifting ring 18 is greater than that of the guide pipe 17. When it is necessary to move the puncture needle 3 through the connecting pipe 2, it is convenient for the staff to move the connecting pipe 2 to the left by pushing the lifting ring 18. In this paper, the guide grooves of the guide pipe 17 are two symmetrically distributed ones, and their number can be adjusted according to the actual situation. The spring 19 is used to push the lifting ring 18 to move to the right and reset. The guide grooves of the guide pipe 17 limit the moving range of the lifting ring 18. In the process of moving the connecting pipe 2 to the left through the threaded ring 16, the distance between the lifting ring 18 and the left part of the guide groove on the guide pipe 17 is changed to adjust the distance of the connecting pipe 2 moving the puncture needle 3 to the left, so that the puncture depth of the puncture needle 3 changes with its length. The scale lines 20 are two, which are respectively located on the front and back of the guide pipe 17, and are used to facilitate the staff to confirm the moving distance of the lifting ring 18 when adjusting the initial position of the connecting pipe 2, and improve the moving accuracy of the lifting ring 18. The limit racks 21 are two, which are symmetrically distributed on the guide pipe 17. The left part of the limit rack 21 is fixed with the guide pipe 17, and the right part of the limit rack 21 is provided with an inclined surface. In the process of moving the lifting ring 18 to the left, when the lifting ring 18 contacts with the inclined surface of the limit rack 21, the lifting ring 18 can deform the limit rack 21 by extruding the inclined surface, so that the right part of the limit rack 21 moves away from the lifting ring 18, so that the lifting ring 18 passes through the right part of the limit rack 21. After the lifting ring 18 passes through the right part of the limit rack 21, the right part of the limit rack 21 resets under the action of its own elastic force and clamps the lifting ring 18, so that the staff does not need to press the lifting ring 18 for a long time, and it is convenient for the staff to perform other operations.

[0047] In the embodiment 3, as shown in the drawings, Figure 4 and Figure 7 The connecting pipe 2 is fixed with an elastic plate 22, which is used to shield the communication part between the liquid storage cavity of the connecting pipe 2 and the puncture needle 3.

[0048] In the above scheme, the elastic plate 22 is located on the left part of the liquid storage cavity of the connecting tube 2, there is an included angle between the elastic plate 22 and the left side of the liquid storage cavity of the connecting tube 2, and the included angle is less than 20°, so as to facilitate the flow of the liquid to guide the elastic plate 22 to deform, the area of the elastic plate 22 is greater than the flow area of the connecting tube 2 and the communication hole on the puncture needle 3, after the flow rate of the liquid in the connecting tube 2 to the puncture needle 3 is increased, the liquid guide elastic plate 22 deflects clockwise, so that the gap between the elastic plate 22 and the connecting tube 2 is reduced, thereby reducing the speed of the liquid in the puncture needle 3 into the connecting tube 2, so that the injection speed of the liquid is kept stable.

[0049] The above merely provides a specific implementation of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be covered within the protection scope of the present application.

Claims

1. A puncture device for pharmaceutical injection testing, characterized in that, The device includes a support plate (1), a connecting tube (2) slidably connected to the support plate (1), a puncture needle (3) installed at one end of the connecting tube (2) near the support plate (1), a fluid storage chamber provided inside the connecting tube (2), the fluid storage chamber of the connecting tube (2) communicating with the puncture needle (3), and symmetrically distributed connecting rods (4) fixedly connected to the side of the support plate (1) away from the connecting tube (2). The axes of the symmetrically distributed connecting rods (4) and the axis of the connecting tube (2) are both located on the same plane. The symmetrically distributed connecting rods (4) are hinged together to a positioning plate (5). The positioning plate (5) is provided with a through hole. The through hole of the positioning plate (5) is used to allow the puncture needle (3) to pass through. The positioning plate (5) is used to squeeze the patient's skin. The positioning plate (5) is slidably connected with symmetrically distributed pusher blocks (6), the pusher blocks (6) are located on the inclined surface corresponding to the positioning plate (5), and the pusher blocks (6) are used to push the patient's skin to move. A positioning ring (7) is slidably connected to the positioning plate (5). The positioning ring (7) is provided with a clearance hole. The positioning ring (7) is hinged to a sliding frame (8). The sliding frame (8) is slidably connected to the connecting pipe (2). A rough surface is provided between the connecting pipe (2) and the sliding frame (8). The connecting pipe (2) drives the sliding frame (8) to move through the rough surface between the two. The positioning ring (7) is fixedly connected to symmetrically distributed extrusion plates (9). A triangular block (10) is fixedly connected to the side of the pusher block (6) near the support plate (1). The extrusion plate (9) pushes the pusher block (6) to move by extruding the triangular block (10). The axis of the positioning ring (7) coincides with the axis of the through hole on the positioning plate (5). The positioning plate (5) is hinged with an adjusting rod (11), the support plate (1) is provided with symmetrically distributed sliding grooves, the adjusting rod (11) is slidably connected with a sliding sleeve (12), the sliding sleeve (12) slides in one of the sliding grooves of the support plate (1), the positioning plate (5) is hinged with a threaded rod (13), the threaded rod (13) is used to adjust the angle of the positioning plate (5), the threaded rod (13) is threadedly connected with a threaded sleeve (14), the threaded sleeve (14) slides in another sliding groove of the support plate (1).

2. A puncture device for pharmaceutical injection testing according to claim 1, characterized in that, The positioning plate (5) has symmetrically distributed inclined surfaces on the side away from the support plate (1), and the distance between the symmetrically distributed inclined surfaces on the positioning plate (5) decreases as the distance between it and the support plate (1) increases.

3. A puncture device for pharmaceutical injection testing according to claim 2, characterized in that, The pusher block (6) has a U-shaped groove (601) on the side away from the support plate (1).

4. A puncture device for pharmaceutical injection testing according to claim 3, characterized in that, The support plate (1) is rotatably connected to a threaded cylinder (15) on the side away from the positioning plate (5). The connecting pipe (2) is splined connected to a threaded ring (16). The threaded ring (16) is threadedly connected to the threaded cylinder (15). The threaded cylinder (15) is used to adjust the position of the threaded ring (16).

5. A puncture device for pharmaceutical injection testing according to claim 4, characterized in that, The threaded cylinder (15) is rotatably connected to a guide tube (17), the guide tube (17) is slidably connected to the connecting tube (2), the connecting tube (2) is fixedly connected to a lifting ring (18), the guide tube (17) is provided with a guide groove, the lifting ring (18) slides in the guide groove of the guide tube (17), and a spring (19) is provided between the lifting ring (18) and the guide tube (17).

6. A puncture device for pharmaceutical injection testing according to claim 5, characterized in that, The guide tube (17) is provided with symmetrically distributed scale lines (20), which are used to show the position of the lifting ring (18).

7. A puncture device for pharmaceutical injection testing according to claim 6, characterized in that, The guide tube (17) is fixed with symmetrically distributed limiting frames (21), which are made of elastic material and are used to limit the position of the lifting ring (18).

8. A puncture device for pharmaceutical injection testing according to claim 7, characterized in that, The limiting frame (21) is J-shaped, and an inclined surface is provided on the side near the support plate (1).

9. A puncture device for pharmaceutical injection testing according to claim 8, characterized in that, An elastic plate (22) is fixed inside the connecting tube (2). The elastic plate (22) is used to block the connection between the liquid storage chamber of the connecting tube (2) and the puncture needle (3).

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