Ultrasonic biopsy needle with stepless locking device

Abstract

The invention provides an ultrasonic biopsy needle with a stepless locking device. The ultrasonic biopsy needle with the stepless locking device comprises a rear handle, the rear end of the rear handle is in threaded connection with a Luer taper, the inner wall of the Luer taper is fixedly connected with an outer tube, a needle is arranged in the outer tube, the inner wall of the rear handle is in sliding connection with a fixed core rod, the rear end of the fixed core rod is in threaded connection with a rear cover, and the rear cover is in threaded connection with the rear handle. The front end of the fixed core rod is in threaded connection with a replaceable limiting device arranged at the front end, and the limiting device is provided with a button limiting device, a wrench limiting device, an elastic element limiting device and a nut limiting device. According to the ultrasonic biopsy needle with the stepless locking device, the length of the biopsy needle can be freely adjusted through the limiting device.

Description

Technical Field

[0001] The invention relates to the technical field of biopsy needle limiting, in particular to an ultrasonic biopsy needle with a stepless locking device. Background Art

[0002] An ultrasonic biopsy needle with a stepless locking device is a rapid detection technology widely used in medical diagnosis and other fields. The present application relates to an ultrasonic biopsy needle with a stepless locking device. Currently, the ultrasonic biopsy needles on the market cannot lock the needle length at any time. During clinical use, doctors can only control and lock the needle length before surgery, and cannot lock the needle back.

[0003] The present application adds a stepless locking device based on the original ultrasonic biopsy needle. In clinical use, it can be locked in real time by rotation or pressing. After locking, the needle length will be fixed, which is convenient for clinical use and doctor operation. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides an ultrasonic biopsy needle with a stepless locking device, which solves the problem of stepless locking and limiting.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solutions: an ultrasonic biopsy needle with a stepless locking device, comprising: a rear handle, a rear end of the rear handle is threadedly connected to a Luer connector, the inner wall of the Luer connector is fixedly connected to an outer tube, a needle is arranged inside the outer tube, the inner wall of the rear handle is slidably connected to a fixed core rod, the rear end of the fixed core rod is threadedly connected to a rear cover, the front end of the fixed core rod is threadedly connected to a front handle, and a limiting device is arranged at the front end of the rear handle.

[0006] Preferably, a heat shrink tube is provided at the front end of the front handle, and the inner wall of the heat shrink tube is in contact with the outer tube.

[0007] Preferably, the outer surface of the rear cover is slidably connected to the rear handle, and the inner wall of the rear cover is slidably connected to the outer tube.

[0008] Preferably, the outer surface of the rear handle is provided with a first clamping groove, and the outer surface of the fixed core rod is provided with a limiting groove.

[0009] Preferably: the limiting device is a button limiting device, and the button limiting device comprises: a button, a groove, a spring, a second fixing piece, a first clamping block, a second clamping block and a second clamping groove, the inner wall of the first clamping groove contacts the second fixing piece through the first clamping block, the outer side of the second fixing piece is slidably connected to the second clamping block through the second clamping groove, the rear end of the second clamping block is fixedly connected to the button, the outer surface of the second fixing piece contacts the spring through the groove, the outer surface of the spring contacts the button, and the inner wall of the button contacts the limiting groove through the limiting piece.

[0010] Preferably: the limiting device is a wrench limiting device, the wrench limiting device comprises a fixing ring, a shaft, a third clamping block, an eccentric wrench and a hole, the front end of the rear handle is fixedly connected to the fixing ring, the side end of the fixing ring is fixedly connected to the shaft, the outer surface of the shaft is rotatably connected to the eccentric wrench through the hole, the lower end of the eccentric wrench is fixedly connected to the third clamping block, and the third clamping block is in contact with the limiting groove.

[0011] Preferably: the limiting device is an elastic element limiting device, and the elastic element limiting device includes a first fixing member, a limiting block, a pressing block and a fourth clamping block, the inner wall of the first clamping groove is fixed to the first fixing member through the fourth clamping block, the upper end of the first fixing member is in contact with the pressing block, the front end of the pressing block is fixedly connected to the limiting block, and the lower end of the limiting block is in contact with the limiting groove.

[0012] Preferably: the limiting device is a nut limiting device, the nut limiting device includes a nut and a limiting ring, the front end of the rear handle is threadedly connected to the nut, the inner wall of the nut is fixedly connected to the limiting ring, and the inner wall of the limiting ring is slidably connected to the fixed core rod.

[0013] The present invention provides an ultrasonic biopsy needle with a stepless locking device. It has the following beneficial effects:

[0014] The ultrasonic biopsy needle with a stepless locking device can freely adjust the length of the biopsy needle by setting a limiting device, and can be locked at will, thereby improving the use efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0016] Figure 2 It is an internal schematic diagram of the present invention.

[0017] Figure 3 It is a schematic structural diagram of the button limiting device of the present invention.

[0018] Figure 4 It is a structural schematic diagram of the wrench limiting device of the present invention.

[0019] Figure 5 It is a schematic structural diagram of the elastic element limiting device of the present invention.

[0020] Figure 6 It is a structural schematic diagram of the nut limiting device of the present invention.

[0021] Among them, 1. rear handle; 2. Luer connector; 3. outer tube; 4. needle; 5. heat shrink tube; 6. fixed core rod; 7. limit groove; 8. rear cover; 9. first slot; 10. button; 11. groove; 12. spring; 13. front handle; 14. first clamping block; 15. second clamping block; 16. second slot; 17. fixing ring; 18. shaft; 19. third clamping block; 20. eccentric wrench; 21. hole; 22. pressing block; 23. first fixing piece; 24. limit block; 25. fourth clamping block; 26. nut; 27. limit ring; 28. button limit device; 29. ​​wrench limit device; 30. elastic element limit device; 31. nut limit device; 32. second fixing piece; 33. limit device. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0023] Embodiment 1

[0024] like Figure 1-3 As shown, an embodiment of the present invention provides an ultrasonic biopsy needle with a stepless locking device, including a rear handle 1, a rear end of the rear handle 1 being threadedly connected to a Luer connector 2, an inner wall of the Luer connector 2 being fixedly connected to an outer tube 3, an inner portion of the outer tube 3 being provided with a needle 4, an inner wall of the rear handle 1 being slidably connected to a fixed core rod 6, a rear end of the fixed core rod 6 being threadedly connected to a rear cover 8, a front end of the fixed core rod 6 being threadedly connected to a front handle 13, a front end of the rear handle 1 being provided with a limiting device 33, a front end of the front handle 13 being provided with a heat shrink tube 5, an inner wall of the heat shrink tube 5 being in contact with the outer tube 3, an outer surface of the rear cover 8 being slidably connected to the rear handle 1, an inner wall of the rear cover 8 being slidably connected to the outer tube 3, an outer surface of the rear handle 1 being provided with a first card slot 9, and an outer surface of the fixed core rod 6 being provided with a limiting slot 7.

[0025] The limiting device 33 is a button limiting device 28, which includes: a button 10, a groove 11, a spring 12, a second fixing member 32, a first clamping block 14, a second clamping block 15 and a second clamping groove 16. The inner wall of the first clamping groove 9 contacts the second fixing member 32 through the first clamping block 14, the outer side of the second fixing member 32 is slidingly connected to the second clamping block 15 through the second clamping groove 16, the rear end of the second clamping block 15 is fixedly connected to the button 10, the outer surface of the second fixing member 32 contacts the spring 12 through the groove 11, the outer surface of the spring 12 contacts the button 10, and the inner wall of the button 10 contacts the limiting groove 7 through the limiting member.

[0026] Embodiment 2

[0027] like Figure 4 As shown, an embodiment of the present invention provides an ultrasonic biopsy needle with a stepless locking device, including a rear handle 1, a rear end of the rear handle 1 being threadedly connected to a Luer connector 2, an inner wall of the Luer connector 2 being fixedly connected to an outer tube 3, an inner portion of the outer tube 3 being provided with a needle 4, an inner wall of the rear handle 1 being slidably connected to a fixed core rod 6, a rear end of the fixed core rod 6 being threadedly connected to a rear cover 8, a front end of the fixed core rod 6 being threadedly connected to a front handle 13, a front end of the rear handle 1 being provided with a limiting device 33, a front end of the front handle 13 being provided with a heat shrink tube 5, an inner wall of the heat shrink tube 5 being in contact with the outer tube 3, an outer surface of the rear cover 8 being slidably connected to the rear handle 1, an inner wall of the rear cover 8 being slidably connected to the outer tube 3, an outer surface of the rear handle 1 being provided with a first card slot 9, and an outer surface of the fixed core rod 6 being provided with a limiting slot 7.

[0028] The limiting device 33 is a wrench limiting device 29, which includes a fixing ring 17, a shaft 18, a third clamping block 19, an eccentric wrench 20 and a hole 21. The front end of the rear handle 1 is fixedly connected to the fixing ring 17, the side end of the fixing ring 17 is fixedly connected to the shaft 18, the outer surface of the shaft 18 is rotatably connected to the eccentric wrench 20 through the hole 21, the lower end of the eccentric wrench 20 is fixedly connected to the third clamping block 19, and the third clamping block 19 is in contact with the limiting groove 7.

[0029] Embodiment 3

[0030] like Figure 5 As shown, an embodiment of the present invention provides an ultrasonic biopsy needle with a stepless locking device, including a rear handle 1, a rear end of the rear handle 1 being threadedly connected to a Luer connector 2, an inner wall of the Luer connector 2 being fixedly connected to an outer tube 3, an inner portion of the outer tube 3 being provided with a needle 4, an inner wall of the rear handle 1 being slidably connected to a fixed core rod 6, a rear end of the fixed core rod 6 being threadedly connected to a rear cover 8, a front end of the fixed core rod 6 being threadedly connected to a front handle 13, a front end of the rear handle 1 being provided with a limiting device 33, a front end of the front handle 13 being provided with a heat shrink tube 5, an inner wall of the heat shrink tube 5 being in contact with the outer tube 3, an outer surface of the rear cover 8 being slidably connected to the rear handle 1, an inner wall of the rear cover 8 being slidably connected to the outer tube 3, an outer surface of the rear handle 1 being provided with a first card slot 9, and an outer surface of the fixed core rod 6 being provided with a limiting slot 7.

[0031] The limiting device 33 is an elastic element limiting device 30, which includes a first fixing member 23, a limiting block 24, a pressing block 22 and a fourth clamping block 25. The inner wall of the first clamping groove 9 is fixed to the first fixing member 23 through the fourth clamping block 25. The upper end of the first fixing member 23 contacts the pressing block 22, the front end of the pressing block 22 is fixedly connected to the limiting block 24, and the lower end of the limiting block 24 contacts the limiting groove 7.

[0032] The nut limiting device 31 includes a nut 26 and a limiting ring 27 .

[0033] Embodiment 4

[0034] like Figure 6 As shown, an embodiment of the present invention provides an ultrasonic biopsy needle with a stepless locking device, including a rear handle 1, a rear end of the rear handle 1 being threadedly connected to a Luer connector 2, an inner wall of the Luer connector 2 being fixedly connected to an outer tube 3, an inner portion of the outer tube 3 being provided with a needle 4, an inner wall of the rear handle 1 being slidably connected to a fixed core rod 6, a rear end of the fixed core rod 6 being threadedly connected to a rear cover 8, a front end of the fixed core rod 6 being threadedly connected to a front handle 13, a front end of the rear handle 1 being provided with a limiting device 33, a front end of the front handle 13 being provided with a heat shrink tube 5, an inner wall of the heat shrink tube 5 being in contact with the outer tube 3, an outer surface of the rear cover 8 being slidably connected to the rear handle 1, an inner wall of the rear cover 8 being slidably connected to the outer tube 3, an outer surface of the rear handle 1 being provided with a first card slot 9, and an outer surface of the fixed core rod 6 being provided with a limiting slot 7.

[0035] The nut limiting device 31, the limiting device 33 is the nut limiting device 31, the nut limiting device 31 includes a nut 26 and a limiting ring 27, the front end of the rear handle 1 is threadedly connected to the nut 26, the inner wall of the nut 26 is fixedly connected to the limiting ring 27, and the inner wall of the limiting ring 27 is slidably connected to the fixed core rod 6.

[0036] Working principle: Figure 1As shown, the proximal hand-held portion of the ultrasonic biopsy needle in the present application is composed of a front handle 13, a fixed core rod 6, a button 10, a spring 12, a second fixing member 32, a rear handle 1, a Luer connector 2, a needle tube 4, and a rear cover 8. The fixed core rod 6 and the rear cover 8 are located inside the rear handle 1, the second fixing member 32 is sleeved on the fixed core rod 6 and fixed to the rear handle 1 by means of glue or buckle, the button 10 is matched with the second fixing member 32 by buckle, the spring 12 is located between the button 10 and the fixed core rod 6, pressing the button 10 can compress the spring 12, and releasing the button 10 can reset the spring 12, the rear cover 8 is connected to the fixed core rod 6 by threads, the needle 4 passes through the middle of the rear cover 8, and the rear cover 8 plays a certain supporting role for the needle 4. When the rear handle 1 moves to the rearmost side along the fixed core rod 6, That is, when the needle 4 is retracted, the second fixing member 32 and the rear cover 8 will interfere with the limit position to prevent the rear handle 1 from falling off the fixed core rod 6. When the button 10 is released, the second block 15 on the fixed core rod 6 interferes with the button 10. The second block 15 limits the button 10 from moving along the fixed core rod 6. At this time, the second fixing member 32, the spring 12, the rear handle 1, the Luer connector 2, and the needle 4 are also unable to move along the fixed core rod 6. The ultrasonic biopsy needle is in a locked state, and the needle 4 cannot be removed or retracted. When the button 10 is pressed, the second block 15 does not interfere with the button 10, and the limit position is released. The button 10, the second fixing member 32, the spring 12, the rear handle 1, the Luer connector 2, and the needle 4 can move along the fixed core rod 6. The ultrasonic biopsy needle is in an unlocked state, and the needle 4 can be removed or retracted.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An ultrasonic biopsy needle with a stepless locking device, characterized in that: include: A rear handle (1), wherein the rear end of the rear handle (1) is threadedly connected to a Luer connector (2), the inner wall of the Luer connector (2) is fixedly connected to an outer tube (3), a needle (4) is arranged inside the outer tube (3), the inner wall of the rear handle (1) is slidably connected to a fixed core rod (6), the rear end of the fixed core rod (6) is threadedly connected to a rear cover (8), the front end of the fixed core rod (6) is threadedly connected to a front handle (13), and a limiting device (33) is arranged at the front end of the rear handle (1).

2. The ultrasonic biopsy needle with a stepless locking device according to claim 1, characterized in that: A heat shrink tube (5) is provided at the front end of the front handle (13), and the inner wall of the heat shrink tube (5) is in contact with the outer tube (3).

3. The ultrasonic biopsy needle with a stepless locking device according to claim 1, characterized in that: The outer surface of the rear cover (8) is slidably connected to the rear handle (1), and the inner wall of the rear cover (8) is slidably connected to the outer tube (3).

4. The ultrasonic biopsy needle with a stepless locking device according to claim 1, characterized in that: The outer surface of the rear handle (1) is provided with a first clamping groove (9), and the outer surface of the fixed core rod (6) is provided with a limiting groove (7).

5. The limiting device according to claim 1, characterized in that: The limiting device (33) is a button limiting device (28), and the button limiting device (28) comprises: a button (10), a groove (11), a spring (12), a second fixing member (32), a first clamping block (14), a second clamping block (15) and a second clamping groove (16); the inner wall of the first clamping groove (9) contacts the second fixing member (32) through the first clamping block (14); the outer side of the second fixing member (32) is slidably connected to the second clamping block (15) through the second clamping groove (16); the rear end of the second clamping block (15) is fixedly connected to the button (10); the outer surface of the second fixing member (32) contacts the spring (12) through the groove (11); the outer surface of the spring (12) contacts the button (10); and the inner wall of the button (10) contacts the limiting groove (7) through the limiting member.

6. The limiting device according to claim 1, characterized in that: The limiting device (33) is a spanner limiting device (29), and the spanner limiting device (29) comprises a fixing ring (17), a shaft (18), a third clamping block (19), an eccentric spanner (20) and a hole (21); the front end of the rear handle (1) is fixedly connected to the fixing ring (17); the side end of the fixing ring (17) is fixedly connected to the shaft (18); the outer surface of the shaft (18) is rotatably connected to the eccentric spanner (20) through the hole (21); the lower end of the eccentric spanner (20) is fixedly connected to the third clamping block (19); and the third clamping block (19) is in contact with the limiting groove (7).

7. The limiting device according to claim 4, characterized in that: The limiting device (33) is an elastic element limiting device (30), and the elastic element limiting device (30) comprises a first fixing member (23), a limiting block (24), a pressing block (22) and a fourth clamping block (25); the inner wall of the first clamping groove (9) is fixed to the first fixing member (23) by the fourth clamping block (25); the upper end of the first fixing member (23) is in contact with the pressing block (22); the front end of the pressing block (22) is fixedly connected to the limiting block (24); and the lower end of the limiting block (24) is in contact with the limiting groove (7).

8. The limiting device according to claim 1, characterized in that: The limiting device (33) is a nut limiting device (31), and the nut limiting device (31) comprises a nut (26) and a limiting ring (27). The front end of the rear handle (1) is threadedly connected to the nut (26), the inner wall of the nut (26) is fixedly connected to the limiting ring (27), and the inner wall of the limiting ring (27) is slidably connected to the fixed core rod (6).

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