Semi-automatic biopsy needle

Abstract

The utility model discloses a semi-automatic biopsy needle, which relates to the technical field of medical science and comprises a shell, fixing rings are fixedly mounted on the outer walls of the two sides of the shell, a connecting rod is arranged on the outer wall of one end of the shell in a penetrating manner and is in sliding connection with the shell, and a pull block is fixedly mounted at one end of the connecting rod. A connecting plate slidably connected with the inner wall of the shell is fixedly mounted at the other end of the connecting rod, a needle tube slidably connected with the outer wall of the other end of the shell penetrates through the outer wall of the other end of the shell, one end of the needle tube is fixedly connected with the connecting plate, and a tension spring is fixedly connected between the connecting plate and the inner wall of the other end of the shell. By arranging the anti-falling structure and the auxiliary mechanism, limiting of the ejector rod and releasing of limiting of the ejector rod can be achieved by pressing different anti-falling blocks, so that the needle tube can conduct stored force launching to achieve tissue cutting, the limiting position of the ejector rod can be adjusted, adjustment of the stored force is achieved, and the cutting efficiency is improved. Therefore, the device can be inserted into tissues with different depths.

Description

Technical Field

[0001] This utility model relates to the field of medical technology, and in particular to a semi-automatic biopsy needle. Background Technology

[0002] With the continuous development of medical technology, ultrasound-guided histological biopsy has been increasingly used in recent years. This method, performed under ultrasound imaging, involves a minimally invasive percutaneous approach to the target tissue, where a groove-like incision is made to obtain a tissue sample for histological and pathological analysis. In recent years, semi-automatic biopsy needles have also seen a surge in applications. Compared to traditional manual biopsy needles, semi-automatic needles offer advantages such as ease of operation, accurate sample collection, and minimal trauma. They enable automated tissue cutting and sample collection via mechanical devices, significantly reducing the workload for doctors and improving the efficiency and accuracy of biopsies.

[0003] However, existing semi-automatic biopsy needles still have some shortcomings in practical applications. For example, the biopsy needle proposed in Chinese patent CN202740039U requires the needle core to be pushed out, the needle tip to be inserted into the biopsy site, the needle core to be pulled back, and the biopsy tissue to be taken through the thin-walled side and taken out of the body. Another example is a biopsy needle proposed in Chinese patent CN219207061U, which requires holding the needle body and then using two fingers to hook it into the needle handle. Then, the beveled needle tip of the needle body connected to one end of the needle body is inserted into the organ to be sampled. However, this type of biopsy needle is difficult to cut tissue instantly and is difficult to control the cutting depth, which can easily lead to incomplete samples or damage to surrounding tissues, making it difficult to meet the biopsy needs of different anatomical sites and pathological types. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned shortcomings in the existing technology by proposing a semi-automatic biopsy needle.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A semi-automatic biopsy needle includes a housing, with fixing rings fixedly installed on both outer walls of the housing. A connecting rod is slidably connected to one end of the outer wall of the housing, and a connecting plate is fixedly installed at the other end of the connecting rod and slidably connected to the inner wall of the housing. A needle tube is slidably connected to the other end of the outer wall of the housing, with one end of the needle tube fixedly connected to the connecting plate. Three anti-dislodgement mechanisms are provided on the housing, and auxiliary mechanisms are provided inside the housing.

[0007] Preferably, the anti-detachment mechanism includes a mounting block that extends through and is slidably connected to the top of the housing, and the anti-detachment block is fixedly mounted on one end of the mounting block located outside the housing.

[0008] Preferably, the auxiliary mechanism includes a fixed block fixedly installed on the top of the housing, a first telescopic rod fixedly installed on one side wall of the fixed block, a strip plate fixedly connected to one end of the first telescopic rod, and a first spring fixedly connected between the strip plate and the fixed block.

[0009] Preferably, a pull block located outside the housing is fixedly installed at one end of the connecting rod, and a tension spring is fixedly connected between the connecting plate and the inner wall of the other end of the housing.

[0010] Preferably, all three mounting blocks are rectangular blocks, and a round rod located inside the outer shell is rotatably connected to each mounting block. A second spring is fixedly connected between the anti-detachment block and the top of the outer shell.

[0011] Preferably, the strip is provided with a reset groove and two slots, and the bottom of the two mounting blocks opposite to the two slots is fixedly connected to two second telescopic rods. The telescopic ends of the two second telescopic rods located on the same mounting block are fixedly connected to the same limiting block. The strip is slidably connected to the inner top of the outer shell.

[0012] Preferably, the vertical cross-section of both limiting blocks is a right-angled triangle, and the bottom of each of the two mounting blocks opposite to the two slots is fixedly connected to one end of a set of third springs. The two sets of third springs are respectively fixedly connected to the top of the two limiting blocks, and a top rod is fixedly installed on the top of the connecting plate.

[0013] The beneficial effects of this utility model are:

[0014] This invention achieves flexible limiting and releasing of the push rod by setting up an anti-detachment structure and auxiliary mechanism. Users can easily control the fixing and releasing of the push rod by pressing different anti-detachment blocks, thereby driving the needle to charge and fire, effectively completing the tissue cutting operation.

[0015] The aforementioned design also features an adjustable push rod limit position, meaning users can flexibly adjust the limit position of the push rod according to actual needs, thereby achieving precise adjustment of the force stored. This feature makes the device suitable for tissue insertion at different depths, improving its flexibility and applicability. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of one side of a semi-automatic biopsy needle proposed in this utility model;

[0017] Figure 2 Here is a three-dimensional structural diagram of the other side of the semi-automatic biopsy needle proposed in this utility model:

[0018] Figure 3This is a schematic diagram of the planar structure of a semi-automatic biopsy needle proposed in this utility model;

[0019] Figure 4 This is a three-dimensional structural diagram of the strip and mounting block of this utility model;

[0020] Figure 5 This is a three-dimensional structural diagram of the strip, slot, and reset slot of this utility model.

[0021] In the diagram: 1. Outer shell, 2. Fixing ring, 3. Anti-detachment block, 4. Pulling block, 5. Needle tube, 6. Mounting block, 7. Limiting block, 8. Strip plate, 9. Fixing block, 10. First spring, 11. First telescopic rod, 12. Top rod, 13. Connecting plate, 14. Tension spring, 15. Second spring, 16. Round rod, 17. Reset groove, 18. Slot, 19. Third spring, 20. Second telescopic rod, 21. Connecting rod. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Reference Figures 1-5 A semi-automatic biopsy needle includes a housing 1. Fixing rings 2 are fixedly installed on both outer walls of the housing 1. A connecting rod 21, slidably connected to one end of the outer wall of the housing 1, is passed through the housing 1. A pull block 4 is fixedly installed at one end of the connecting rod 21, allowing the user to operate the biopsy needle by pulling the pull block 4. A connecting plate 13, slidably connected to the inner wall of the housing 1, is fixedly installed at the other end of the connecting rod 21. A needle tube 5, slidably connected to the other end of the outer wall of the housing 1, is passed through the housing 1. One end of the needle tube 5 is fixedly connected to the connecting plate 13. A tension spring 14 is fixedly connected between the connecting plate 13 and the inner wall of the other end of the housing 1, providing power during release. To help the syringe 5 be ejected quickly, the outer shell 1 is provided with three anti-detachment mechanisms. The anti-detachment mechanism includes a mounting block 6 that runs through the top of the outer shell 1 and is slidably connected to it. An anti-detachment block 3 is fixedly installed at one end of the mounting block 6 outside the outer shell 1. The user can operate the anti-detachment mechanism by pressing the anti-detachment block 3. A second spring 15 is fixedly connected between the anti-detachment block 3 and the top of the outer shell 1. When the anti-detachment block 3 is pressed, the second spring 15 is compressed and provides a reset force when released. A round rod 16 located inside the outer shell 1 is rotatably connected to the mounting block 6. The round rod 16 is used to cooperate with the reset groove 17 and the slot 18 on the strip plate 8 to realize the anti-detachment and unlocking functions.

[0024] An auxiliary mechanism is provided inside the outer casing 1. The auxiliary mechanism includes a fixing block 9 fixedly installed on the top of the inner casing 1. A first telescopic rod 11 is fixedly installed on one side wall of the fixing block 9. A strip plate 8 is fixedly connected to one end of the first telescopic rod 11. The strip plate 8 is slidably connected to the top of the inner casing 1. A first spring 10 is fixedly connected between the strip plate 8 and the fixing block 9. The strip plate 8 is provided with a reset groove 17 and two slots 18. These slots are used to cooperate with the round rod 16 to achieve different functional states. Two second telescopic rods 20 are fixedly connected to the bottom of the two mounting blocks 6 opposite to the two slots 18. The two second telescopic rods 20 located on the same mounting block 6 are... The telescopic end of the telescopic rod 20 is fixedly connected to the same limiting block 7. The vertical cross-section of the two limiting blocks 7 is a right-angled triangle. The bottom of the two mounting blocks 6 opposite to the two slots 18 is fixedly connected to one end of a set of third springs 19. The two sets of third springs 19 are fixedly connected to the top of the two limiting blocks 7 respectively. The third springs 19 are used to provide reset power after the limiting blocks 7 are pushed, helping the limiting blocks 7 to return to the initial position. The top of the connecting plate 13 is fixedly installed with a push rod 12. The three mounting blocks 6 are all rectangular blocks. The push rod 12 will interact with the limiting blocks 7 during the movement to realize the power charging and unlocking function of the biopsy needle.

[0025] When using this utility model, in the attached... Figure 2 In the initial state, pulling the pull block 4 to the left moves the top rod 12 on the connecting plate 13. The top rod 12 will not contact the limiting block 7, so it cannot charge up for launch. When charging up for launch is required, press down on the anti-detachment block 3 corresponding to the slot 18. The second spring 15 is compressed. The movement of the anti-detachment block 3 drives the mounting block 6, the round rod 16 on the mounting block 6, the second telescopic rod 20, and the limiting block 7 to move downward. During the downward movement of the round rod 16, the round rod 16 will first contact the inclined part of the slot 18. As the round rod 16 continues to move downward, the strip 8 moves towards the fixing block 9, which can compress the first spring 10. When the round rod 16 is located in the horizontal part of the slot 18, the elastic force generated by the compression of the first spring 10 can make the round rod 16 be stuck in the horizontal part of the slot 18. This allows the limiting block 7 to move downward and then reset to the initial position.

[0026] Subsequently in the appendix Figure 2In the current state, pulling the pull block 4 to the left causes the needle tube 5 to move to the left via the connecting rod 21 and the connecting plate 13. The tension spring 14 is stretched, and the movement of the connecting plate 13 simultaneously drives the push rod 12. This allows the push rod 12 to first contact the inclined surface of the limiting block 7, which is positioned a short distance downwards. As the push rod 12 continues to move to the left, the limiting block 7 moves closer to the mounting block 6, compressing the third spring 19. This causes the push rod 12 to move from one side of the limiting block 7 to the other. When the push rod 12 reaches the other side of the limiting block 7, the third spring 19 causes the limiting block 7 to move downwards, locking the push rod 12 and preventing it from resetting. This allows the needle tube 5 to accumulate power. Then, the anti-dislodgement block 3, corresponding to the reset groove 17, is pressed downwards. The anti-dislodgement block 3 then engages with the reset groove 17. The round rod on the mounting block corresponding to the anti-detachment block moves downward. During the downward movement of the round rod 16, it will contact the inclined surface of the reset groove 17 and cause the strip 8 to move closer to the fixing block 9. As the strip 8 moves, the previous round rod 16 will disengage from the horizontal part of the slot 18. Through the second spring 15, the limiting block 7 moves upward to reset, thereby releasing the limiting of the top rod 12. Through the tension generated by the extension of the tension spring 14, the needle tube 5 can be launched to the right, so that the front end of the needle tube 5 enters the biopsy site and cuts off the sample tissue. Since there is no horizontal part on the reset groove 17, the round rod 16 corresponding to the reset groove 17 will not be stuck when the anti-detachment block 3 is released, so it can be reset under the action of the second spring 15. By setting the two slots 18 in different positions, the top rod 12 can be limited in different positions, thereby adjusting the storage force of the needle tube 5 and adjusting the insertion depth of the needle tube 5.

[0027] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A semi-automatic biopsy needle, comprising a housing (1), characterized in that, Fixing rings (2) are fixedly installed on both sides of the outer wall of the outer shell (1). A connecting rod (21) is slidably connected to one end of the outer wall of the outer shell (1). A connecting plate (13) is slidably connected to the inner wall of the outer shell (1) at the other end of the connecting rod (21). A needle tube (5) is slidably connected to the other end of the outer wall of the outer shell (1). One end of the needle tube (5) is fixedly connected to the connecting plate (13). Three anti-detachment mechanisms are provided on the outer shell (1). An auxiliary mechanism is provided inside the outer shell (1).

2. The semi-automatic biopsy needle according to claim 1, characterized in that, The anti-detachment mechanism includes a mounting block (6) that is disposed through the top of the outer shell (1) and slidably connected thereto. An anti-detachment block (3) is fixedly installed at one end of the mounting block (6) located outside the outer shell (1).

3. The semi-automatic biopsy needle according to claim 2, characterized in that, The auxiliary mechanism includes a fixed block (9) fixedly installed on the top of the housing (1), a first telescopic rod (11) fixedly installed on one side wall of the fixed block (9), and a strip plate (8) fixedly connected to one end of the first telescopic rod (11).

4. The semi-automatic biopsy needle according to claim 1, characterized in that, One end of the connecting rod (21) is fixedly installed with a pull block (4) located outside the outer shell (1), and a tension spring (14) is fixedly connected between the connecting plate (13) and the inner wall of the other end of the outer shell (1).

5. A semi-automatic biopsy needle according to claim 3, characterized in that, All three mounting blocks (6) are rectangular blocks, and a round rod (16) located inside the outer shell (1) is rotatably connected to the mounting block (6).

6. A semi-automatic biopsy needle according to claim 5, characterized in that, A second spring (15) is fixedly connected between the top of the anti-detachment block (3) and the outer shell (1), and a reset groove (17) and two card slots (18) are provided on the strip (8).

7. A semi-automatic biopsy needle according to claim 6, characterized in that, Two second telescopic rods (20) are fixedly connected to the bottom of the two mounting blocks (6) opposite to the two slots (18), and the telescopic ends of the two second telescopic rods (20) located on the same mounting block (6) are fixedly connected to the same limiting block (7).

8. A semi-automatic biopsy needle according to claim 7, characterized in that, The strip (8) is slidably connected to the inner top of the outer shell (1), and the vertical cross-sections of the two limiting blocks (7) are both right-angled triangles.

9. A semi-automatic biopsy needle according to claim 8, characterized in that, The bottom of each of the two mounting blocks (6) opposite to the two slots (18) is fixedly connected to one end of a set of third springs (19), and the two sets of third springs (19) are fixedly connected to the top of the two limiting blocks (7).

10. A semi-automatic biopsy needle according to claim 3, characterized in that, A top rod (12) is fixedly installed on the top of the connecting plate (13), and a first spring (10) is fixedly connected between the strip (8) and the fixing block (9).

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