A biopsy needle body assembly

Abstract

The application discloses a biopsy needle body assembly, which comprises a left body, a right body and a trigger mechanism, the left body and the right body are matched with each other, the trigger mechanism is slidably arranged in a cavity formed by matching the left body and the right body, and the body assembly further comprises a fastening device which is slidably matched on the left body and the right body. The application can improve the structural stability and the connecting strength of the biopsy needle body assembly.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a biopsy needle assembly. Background Technology

[0002] A biopsy needle is a medical device used for sampling and aspirating cells from pyramidal tumors and unidentified tumors in various organs such as the kidneys, liver, lungs, breast, thyroid, prostate, pancreas, testes, uterus, ovaries, and the body surface. It features an ergonomic handle, a Luke's locking lug for attaching a syringe post-procedure, and a specially designed cap for safe sample removal. Multiple models of biopsy needles are available for bone marrow biopsies and bone marrow collection / transplantation. The procedure is safe, reliable, quick, and allows for rapid recovery.

[0003] Most existing biopsy needle shells are made of two pieces joined together. However, after prolonged use, the shell is prone to decomposition, increasing the surgical risk. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a biopsy needle body assembly with a stable structure and high connection strength.

[0005] This invention is achieved through the following technical solution:

[0006] A biopsy needle assembly includes a left body, a right body, and a triggering mechanism. The left and right bodies are connected to each other, and the triggering mechanism is slidably disposed in a cavity formed by the connection of the left and right bodies. The assembly also includes a fastening device that is slidably connected to the left and right bodies.

[0007] Furthermore, the fastening device includes an upper retaining shell that is slidably engaged with the left and right bodies.

[0008] Furthermore, the fastening device also includes a lower retaining shell that cooperates with the upper retaining shell, the lower retaining shell being slidably engaged with the left and right machine bodies.

[0009] Furthermore, the upper retaining shell includes a main body, a retaining part, and a bending part. One end of the main body is connected to the retaining part, and the other end is connected to the bending part. The retaining part is slidably engaged with the left and right machine bodies, and the bending part is sleeved on the left and right machine bodies.

[0010] Furthermore, the upper casing has a protruding strip on its locking part or the lower casing, and the left or right body has a slot, wherein the protruding strip is slidably locked in the slot.

[0011] Furthermore, the locking part is also provided with a limiting hole and a limiting groove, the limiting groove is locked with the sliding part on the triggering mechanism, and the limiting hole is locked with the protrusion on the sliding part.

[0012] Furthermore, the snap-fit ​​portion is also provided with a set of concave surfaces, which are disposed on the opposite side of the protrusion.

[0013] Furthermore, a first guide strip is provided on the left body, and the first guide strip abuts against the contact surface on the snap-fit ​​part.

[0014] Furthermore, the main body is provided with a sliding groove, and the sliding groove is slidably connected to the sliding part on the triggering mechanism.

[0015] Furthermore, the lower housing is provided with a positioning hole and a set of openings, the openings being symmetrically arranged relative to the positioning hole, and the positioning hole engaging with the positioning block on the trigger mechanism.

[0016] Compared with the prior art, the advantages of this invention are:

[0017] 1. The biopsy needle includes a left body, a right body, and a fastening device. The left and right bodies can be spliced ​​together, and the fastening device can slide across the connection gap between the left and right bodies, further reinforcing the connection strength between the left and right bodies.

[0018] 2. By setting a first guide bar on the left body, the first guide bar abuts against the contact surface on the locking part, the upper locking shell is closely attached to the first guide bar and moves together with the triggering mechanism. The first guide bar plays a guiding role and prevents the upper locking shell from deviating from the slide after long-term movement.

[0019] 3. The fastening device and the trigger mechanism inside the biopsy needle are engaged. When the trigger mechanism extends or retracts, it may drive the fastening device to move synchronously. The trigger mechanism is located on the inside of the left and right bodies, and the fastening device is located on the outside of the left and right bodies. After the linkage between the trigger mechanism and the fastening device is ensured, the connection strength between the trigger mechanism, the fastening device, and the left and right bodies is improved, thereby improving the stability of the biopsy needle structure.

[0020] 4. The upper retaining shell is provided with a set of concave surfaces on the snap-fit ​​part, which are located on the opposite side of the protrusion; the lower retaining shell is provided with a set of openings, which are symmetrically arranged with respect to the positioning holes. This ensures the strength of the upper and lower retaining shells while making them lightweight and saving on the material cost of the fastening device. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of a biopsy needle body assembly according to an embodiment of the present invention;

[0022] Figure 2 This is a front view of a biopsy needle assembly according to an embodiment of the present invention;

[0023] Figure 3 for Figure 2 Sectional view along the middle AA;

[0024] Figure 4 Cross-section of the biopsy needle body components Figure 1 ;

[0025] Figure 5 for Figure 4 Cross-section of the biopsy needle body assembly at the BB position Figure 2 ;

[0026] Figure 6 Schematic diagram of the structure of the left body and the organism. Figure 1 ;

[0027] Figure 7 Schematic diagram of the structure of the left body and the organism. Figure 2 ;

[0028] Figure 8 Schematic diagram of the upper shell structure Figure 1 ;

[0029] Figure 9 Schematic diagram of the upper shell structure Figure 2 ;

[0030] Figure 10 This is a schematic diagram of the lower shell structure.

[0031] 1. Left body; 10. Slot; 11. First positioning pin; 12. First positioning hole; 13. First guide bar; 14. First groove; 15. Second groove; 16. Boss; 17. Second guide bar; 18. First receiving groove; 19. Sliding groove; 2. Right body; 21. Second positioning pin; 22. Second positioning hole; 23. Limiting block; 24. Third groove; 25. Fourth groove; 26. First sliding groove; 260. Third sliding groove; 27. Second sliding groove; 270. Fourth sliding groove; 28. Second receiving groove; 29. ​​Cavity; 3. Fastening device; 30. Upper retainer; 31. Lower retaining shell; 310. Connecting hole; 311. Opening; 312. Mating surface; 313. Arc-shaped hole; 32. Main body; 320. Sliding groove; 321. Concave strip; 33. Snap-fitting part; 330. Protruding strip; 331. Limiting hole; 332. Concave surface; 333. Fitting surface; 334. Limiting groove; 34. Bending part; 340. Through hole; 341. Contact surface; 4. Triggering mechanism; 40. First triggering component; 400. Protrusion; 401. Sliding part; 41. Second triggering component; 410. Sliding part; 411. Positioning block; 5. Needle; 6. Pressing part; 7. Needle outlet. Detailed Implementation

[0032] The following detailed, non-limiting description of the invention's technical solutions, in conjunction with preferred embodiments and accompanying drawings, is provided. In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the invention, and should not be construed as limiting the invention.

[0033] like Figures 1 to 3 As shown, a biopsy needle assembly according to an embodiment of the present invention includes a left body 1, a right body 2, a fastening device 3, a triggering mechanism 4, a needle 5, and a pressing part 6. The left body 1 and the right body 2 are spliced ​​together by a snap-fit ​​connection. The triggering mechanism 4 and the needle 5 are slidably disposed in a cavity 29 formed between the left body 1 and the right body 2, and a portion of the structure on the triggering mechanism 4 is exposed from the joint between the left body 1 and the right body 2. The fastening device 3 is slidably fitted at the joint between the left body 1 and the right body 2 and is snap-fitted with the triggering mechanism 4 to achieve linkage. The pressing part 6 is disposed on the outside of the left body 1 and connected to the triggering mechanism 4. It is important to emphasize that there are two joints after the left body 1 and right body 2 are engaged. In this embodiment, fastening devices 3 are slidably engaged at the two joints of the left body 1 and right body 2 respectively. The triggering mechanism 4 protrudes from the two joints and engages with the fastening devices 3 respectively, realizing the linkage between the fastening devices 3 and the triggering mechanism 4. The triggering mechanism 4 is located on the inner side of the left body 1 and right body 2, and the fastening device 3 is located on the outer side of the left body 1 and right body 2. After ensuring the linkage between the triggering mechanism 4 and the fastening device 3, the connection strength between the triggering mechanism 4, the fastening device 3, and the left body 1 and right body 2 is improved. The triggering mechanism 4 can slide and extend relative to the left body 1 and right body 2. The pressing part 6 controls the triggering mechanism 4 to return to the retracted state from the extended state. The needle 5 is fixedly connected to the triggering mechanism 4, so that the extension and retraction of the triggering mechanism 4 drives the extension and retraction of the needle 5. The fastening device 3 is snapped into the joint of the left body 1 and the right body 2, further strengthening the connection between the left body 1 and the right body 2 and improving the stability of the biopsy needle assembly structure.

[0034] like Figure 6 and Figure 7 As shown, the left body 1 is provided with several first positioning pins 11 and first positioning holes 12 for positioning and engaging, and also with a first guide strip 13, a first groove 14, a second groove 15, a second guide strip 17, and a first receiving groove 18. In this embodiment, the left body 1 and the right body 2 are each provided with two slots 10, which are located at the edge quarter of the left body 1 or the right body 2. The first guide strip 13 and the slots 10 are arranged parallel to each other. The fastening device 3 is engaged with the slots 10 and can slide relative to the left body 1 or the right body 2. At the same time, the fastening device 3 is in abutting state with the first guide strip 13, which guides the movement of the fastening device 3. The second guide strip 17 and the first guide strip 13 are arranged parallel to each other. The pressing part 6 is located between the second guide strip 17 and the first guide strip 13. The second guide strip 17 and the first guide strip 13 also guide the pressing part 6. Moving the pressing part 6 can trigger the retraction movement of the trigger mechanism 4. Both the left body 1 and the right body 2 are provided with bosses 16, which abut against fastening devices 3.

[0035] The right body 2 is provided with several second positioning pins 21, second positioning holes 22, limiting blocks 23, third grooves 24, fourth grooves 25, and second receiving grooves 28. The second positioning pins 21 are engaged with the first positioning holes 12, and the second positioning holes 22 are engaged with the first positioning pins 11. By providing multiple positioning holes and positioning pins, the degree of engagement between the left body 1 and the right body 2 is improved. The limiting block 23 abuts against the fastening device 3. When the fastening device 3 moves to the position of the boss 16, the fastening device 3 and the limiting block 23 are in abutting state to prevent the fastening device 3 from moving too much and to prevent the generated squeezing force from causing the fastening device 3 to disengage from the slot 10. The first groove 14 and the third groove 24 are fitted together to form the first sliding groove 26, and the second groove 15 and the fourth groove 25 are fitted together to form the second sliding groove 27. The first sliding groove 26 and the second sliding groove 27 are located on the same side of the junction of the left body 1 and the right body 2. The other side of the junction of the left body 1 and the right body 2 is also provided with a third sliding groove 260 corresponding to the first sliding groove 26 and a fourth sliding groove 270 corresponding to the second sliding groove 27.

[0036] like Figures 4 to 5 As shown, the triggering mechanism 4 includes a first triggering component 40 and a second triggering component 41. The first triggering component 40 is provided with a set of sliding portions 401, which slide on the first sliding groove 26 and the third sliding groove 260 respectively. A protrusion 400 is provided on the sliding portion 401 sliding on the side of the first sliding groove 26. The second triggering component 41 is provided with a set of sliding portions 410, which slide on the second sliding groove 27 and the fourth sliding groove 270 respectively. A positioning block 411 is provided on the sliding portion 410 on the side of the fourth sliding groove 270.

[0037] The fastening device 3 is integrally molded by injection molding. The fastening device 3 includes an upper retaining shell 30 and a lower retaining shell 31 that mates with the upper retaining shell 30. The upper retaining shell 30 or the lower retaining shell 31 is slidably engaged with the left body 1 and the right body 2. The contact surface 341 of the upper retaining shell 30 and the mating surface 312 of the lower retaining shell fit together seamlessly, maximizing the connection strength of the fastening device 3 to the left body 1 and the right body 2.

[0038] like Figure 8 and Figure 9 As shown, the upper retainer 30 includes a main body 32, a retaining part 33, and a bending part 34. One end of the main body 32 is connected to the retaining part 33, and the other end is connected to the bending part 34. The retaining part 33 is slidably engaged with the left body 1 and the right body 2, and the bending part 34 is sleeved on the left body 1 and the right body 2.

[0039] The main body 32 is provided with a sliding groove 320 and a recessed strip 321. The sliding part 410 on the side of the second sliding groove 27 can slide in the sliding groove 320. The sliding groove 320 and the sliding part 410 limit each other to ensure the stability of the structure between the upper retaining shell 30 and the triggering mechanism 4. The recessed strip 321 is provided on the outside to save on disassembly materials.

[0040] The engaging part 33 is provided with a protrusion 330, a limiting hole 331, a concave surface 332, a contact surface 333, and a limiting groove 334. The two protrusions 330 are slidably engaged in the slots 10 on the left body 1 and the right body 2, respectively. The sliding part 401 on the side of the first sliding groove 26 engages with the limiting groove 334, and the protrusion 400 on the sliding part 401 engages with the limiting hole 331. A set of concave surfaces 332 are provided on the opposite side of the protrusions 330. This design saves material costs and makes the upper retaining shell 30 lighter while ensuring the strength of the upper retaining shell 30. The contact surface 333 of the engaging part 33 abuts against the first guide bar 13. The upper retaining shell 30 is close to the first guide bar 13 and moves together with the triggering mechanism 4. The first guide bar 13 plays a guiding role and prevents the upper retaining shell 30 from deviating from the slot 10 after long-term movement.

[0041] A through hole 340 is provided on the bending part 34, and the needle end 7 on the left body 1 and the right body 2 passes through the through hole 340.

[0042] like Figure 10As shown, the lower housing 31 is provided with a mating hole 310, a set of openings 311, a protrusion 330 and an arc-shaped hole 313. The protrusion 330 is slidably engaged in the slots 10 on the left body 1 and the right body 2. The openings 311 are symmetrically arranged with respect to the mating hole 310. The mating hole 310 is engaged with the positioning block 411 on the trigger mechanism 4. The arc-shaped hole 313 abuts against both the left body 1 and the right body 2, which can play a limiting role during the sliding of the lower housing 31. The structure is designed with an arc-shaped hole 313 to save materials and make the lower housing 31 lightweight.

[0043] During assembly, the left body 1 and the right body 2 enclose the trigger mechanism 4, such that the sliding part 401 on the trigger mechanism 4 protrudes from the first sliding groove 26 and the third sliding groove 260, and the sliding part 410 protrudes from the second sliding groove 27 and the fourth sliding groove 270. The sliding part 401 with the protrusion 400 is located on the side of the first sliding groove 26, and the sliding part 410 with the positioning block 411 is located on the side of the fourth sliding groove 270. At this time, by combining the left body 1 and the right body 2, the needle 5, which is fixedly connected to the trigger mechanism 4, is accommodated in the sliding groove 19 formed by the first receiving groove 18 and the second receiving groove 28 through external compression of the left body 1 or the right body 2. Finally, the second positioning pin 21 and the first positioning hole 12 are tightly engaged, and the second positioning hole 22 and the first positioning pin 11 are tightly engaged, ensuring that after the left body 1 and the right body 2 are combined, the upper retainer 30 is slidably engaged in the sliding grooves 10 on both sides of the first sliding groove 26 and ensures that the protrusion 400 of the trigger mechanism 4 is engaged in the limiting hole 331 of the upper retainer 30, and the sliding part 401 of the trigger mechanism 4 is engaged in the limiting groove 334 of the upper retainer 30. The upper retainer 30 strengthens the connection strength between the left body 1 and the right body 2 and can be linked with the trigger mechanism 4, further improving the structural strength of the biopsy needle body assembly. The lower retainer 31 is slidably engaged in the slots 10 on both sides of the fourth sliding groove 270, and the positioning block 411 of the trigger mechanism 4 is engaged in the mating hole 310 on the lower retainer 31, so as to realize the linkage between the lower retainer 31 and the trigger mechanism 4.

[0044] When in use, turn on the trigger switch (not shown in the figure), the trigger mechanism 4 is released, the needle 5 moves with the trigger mechanism 4 and extends along the sliding groove 19. At the same time, the trigger mechanism 4 will also drive the fastening device 3 to slide. When the needle 5 retracts, the fastening device 3 will also move together with the trigger mechanism 4. The fastening device 3 strengthens the connection between the left body 1 and the right body 2, making it less likely for them to separate. Since the fastening device 3 moves together with the trigger mechanism 4, the fastening device 3 will not affect the normal operation of the biopsy needle.

[0045] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of this patent should be determined by the appended claims.

Claims

1. A biopsy needle assembly, comprising a left body (1), a right body (2), and a triggering mechanism (4), wherein the left body (1) and the right body (2) are connected to each other, and the triggering mechanism (4) is slidably disposed in a cavity (29) formed by the connection of the left body (1) and the right body (2), characterized in that, The body assembly also includes a fastening device (3), which is slidably mounted on the left body (1) and the right body (2); The fastening device (3) includes an upper retaining shell (30), which is slidably engaged with the left body (1) and the right body (2); The upper retaining shell (30) includes a main body (32), a retaining part (33) and a bending part (34). One end of the main body (32) is connected to the retaining part (33) and the other end is connected to the bending part (34). The retaining part (33) is slidably engaged with the left body (1) and the right body (2). The bending part (34) is sleeved on the left body (1) and the right body (2). The locking part (33) is also provided with a limiting hole (331) and a limiting groove (334). The limiting groove (334) is locked with the sliding part (401) on the trigger mechanism (4), and the limiting hole (331) is locked with the protrusion (400) on the sliding part (401).

2. The biopsy needle assembly according to claim 1, characterized in that, The fastening device (3) also includes a lower retainer (31) that cooperates with the upper retainer (30), and the lower retainer (31) is slidably engaged with the left body (1) and the right body (2).

3. The biopsy needle assembly according to claim 2, characterized in that, The upper casing (30) has a protruding strip (330) on its snap-fit ​​part (33) or the lower casing (31), and the left body (1) or the right body (2) has a slot (10) on its slot (10). The protruding strip (330) is slidably snapped into the slot (10).

4. The biopsy needle assembly according to claim 3, characterized in that, The snap-fit ​​part (33) is also provided with a set of concave surfaces (332), which are located on the opposite side of the protrusion (330).

5. The biopsy needle assembly according to claim 1, characterized in that, The left body (1) is provided with a first guide strip (13), which abuts against the contact surface (333) on the snap-fit ​​part (33).

6. The biopsy needle assembly according to claim 1, characterized in that, The main body (32) is provided with a sliding groove (320), and the sliding groove (320) and the sliding part (410) on the triggering mechanism (4) are slidably connected.

7. The biopsy needle assembly according to claim 2, characterized in that, The lower housing (31) is provided with a mating hole (310) and a set of openings (311). The openings (311) are symmetrically arranged relative to the mating hole (310). The mating hole (310) and the positioning block (411) on the trigger mechanism (4) are engaged.

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