Puncture needle

Abstract

The utility model relates to a puncture needle which comprises a hollow rod body, a puncture head is arranged at one end of the rod body, a connecting section is formed at the other end of the rod body, symmetrically-arranged keys are arranged on the side wall of the connecting section, and a fixing base matched with the keys is arranged on the side wall of the connecting section in a sleeved mode. The end of the fixing seat is provided with an open hole for the endoscope to stretch in, the edge of the inner side of the open hole is provided with a plurality of elastic pieces extending towards the opening of the connecting section, and the elastic pieces are mutually enclosed to form an inner ring for the endoscope to pass through. The utility model has the characteristics that the endoscope is prevented from shaking, the stability of the endoscope in use is kept, the influence on the operation field observation is avoided, the normal use of the endoscope is prevented from being influenced by the sliding of the endoscope, and the like.

Description

Technical Field

[0001] The utility model relates to a puncture needle and belongs to the technical field of medical equipment. Background Art

[0002] In laparoscopic surgery, a trocar is used to puncture the human skin to create a channel for inserting surgical instruments. During this process, the sharp puncture tip needs to stop puncturing as soon as possible after passing through the human skin to avoid damage to other organs. Some surgeries also require the injection of gas into the human body to form an operable surgical space, which requires the product to have sealing performance.

[0003] A Chinese patent application with publication number CN213430449U discloses a visual puncture needle, which includes a puncture rod, a puncture head arranged at the front end of the puncture rod, and an operating end arranged at the rear end of the puncture rod. The needle is characterized in that a visual channel is formed in the puncture rod, and a socket is provided at the rear end of the visual channel so that a camera assembly can be plugged into the visual channel through the socket; an observation window is formed at the front end of the visual channel, and the puncture head is a transparent member.

[0004] When the puncture needle in the prior art is in use, various surgical instruments such as an endoscope are usually inserted into the puncture needle channel. The endoscope is inserted into the puncture device. When the doctor uses the puncture device, the endoscope is prone to radial shaking, which causes the image transmitted by the endoscope to shake, affecting the surgical field effect. When the doctor applies force on the puncture device, the endoscope is prone to slide outward in the puncture needle, affecting the normal use of the endoscope. Utility Model Content

[0005] The utility model aims to provide a puncture needle, which solves the problems of easy shaking and sliding of the endoscope in the prior art.

[0006] The above technical purpose of the utility model is mainly solved by the following technical solutions: a puncture needle comprises a hollow rod body, a puncture head is provided at one end of the rod body, a connecting section is formed at the other end of the rod body, symmetrically arranged buttons are provided on the side wall of the connecting section, a fixing seat cooperating with the button is sleeved on the side wall of the connecting section, an opening for an endoscope to extend into is provided at the end of the fixing seat, a plurality of spring pieces extending toward the opening of the connecting section are provided at the inner edge of the opening, and each of the spring pieces is surrounded by each other to form an inner circle for the endoscope to pass through; a fixing seat is provided on the side wall of the connecting section at the end of the above-mentioned rod body, so that the endoscope can enter the hollow inner cavity of the connecting section and the rod body through the opening, and the positioning of the endoscope is achieved by contact with the spring pieces and the limiting of the inner circle, so as to avoid the endoscope from shaking in the rod body of the puncture needle, maintain the stability of the endoscope when in use, avoid affecting the observation of the surgical field, and avoid the endoscope from sliding out of the rod body and affecting the normal use of the endoscope.

[0007] Preferably, an annular plate coaxially arranged with the connecting section is provided on the inner end surface of the fixing seat corresponding to the circumferential side of the spring sheet, and the end of the annular plate is connected to the end of the connecting section by a snap-fit ​​structure; the arrangement of the annular plate enables the fixing seat to be connected and fixed to the connecting section of the rod body by means of the snap-fit ​​structure, which is more convenient for assembly and production.

[0008] Preferably, the inner wall of the annular plate abuts against the outer wall of the connecting section, a first conical convex portion is provided on the inner side of the end of the annular plate, a second conical convex portion cooperating with the first conical convex portion is provided on the outer wall of the end of the connecting section, a fixing block connected to the key is provided on the side wall of the connecting section, a groove cooperating with the first conical convex portion is formed between the fixing block and the second conical convex portion; the arrangement of the first conical convex portion and the second conical convex portion enables the first conical convex portion to be limited in the groove, thereby connecting and fixing the annular plate and the connecting section abutting against each other, ensuring the connection stability of the fixing seat at the end of the rod body and facilitating assembly.

[0009] Preferably, at least three of the spring clips are evenly distributed on the inner side of the opening and are integrally formed with the fixing seat; the at least three spring clips are evenly distributed on the inner side of the opening, so that the clamping force of the spring clip on the side wall of the endoscope is more uniform and the clamping is more stable. The spring clip and the fixing seat are integrally formed, which makes production more convenient and improves the structural stability of the spring clip, making the clamping of the spring clip more reliable.

[0010] Preferably, each of the spring pieces is inclined inwardly to form a cone-shaped structure, and the inner diameter of the inner circle formed by the spring pieces is smaller than the outer diameter of the endoscope; the above-mentioned spring pieces are inclined inwardly to form a cone-shaped structure, so that the spring pieces can cooperate with the side walls of the endoscope to form a circumferential clamp on the endoscope and a radial limit on the endoscope to prevent the endoscope from shaking, and the inner diameter of the inner circle formed by the spring pieces is smaller than the outer diameter of the endoscope, so that when each spring piece clamps the endoscope, it can increase the clamping force on the endoscope through its own elastic deformation ability, thereby improving the clamping effect, and at the same time can adapt to endoscopes of different diameters, thereby increasing the scope of application.

[0011] Preferably, the length of the spring clip is 1-3 mm; the length of the spring clip is set so that the spring clip fits between the connecting section and the end of the fixing seat, avoiding the spring clip being too long to affect normal assembly, and avoiding the spring clip being too short to elastically clamp the endoscope.

[0012] Therefore, the utility model has the characteristics of preventing the endoscope from shaking, maintaining the stability of the endoscope when in use, avoiding affecting the observation of the surgical field, and preventing the endoscope from sliding and affecting the normal use of the endoscope. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 yes Figure 1 A cross-sectional view of the local structure.

[0015] Figure 3 yes Figure 2 A magnified view of the structure at center. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0017] like Figure 1-2 As shown, a puncture needle comprises a hollow rod body 1, a puncture head 11 is provided at one end of the rod body 1, a connecting section 12 is formed at the other end of the rod body 1, a symmetrically arranged button 13 is provided on the side wall of the connecting section 12, a fixing seat 2 cooperating with the button 13 is sleeved on the side wall of the connecting section 12, an opening 21 for an endoscope to extend into is provided at the end of the fixing seat 2, a plurality of spring pieces 22 extending toward the opening of the connecting section 12 are provided at the inner edge of the opening 21, and the spring pieces 22 are mutually enclosed to form an inner circle 221 for the endoscope to pass through.

[0018] The rod body of the above-mentioned puncture needle is hollow, the puncture head is located at one end of the rod body, and a connecting section is arranged at the other end of the rod body. The puncture head and the button are both existing conventional structures. A slot matching the button is provided on the fixing seat. The opening at the end of the fixing seat, the inner ring and the opening of the rod body are interconnected. The endoscope can be inserted into the inner ring and the inside of the rod body from the opening in turn. When the endoscope is inserted into the inner ring, the spring sheet is slightly deformed and clamped by its own elastic deformation ability, and maintains the clamping state to limit the shaking of the endoscope. The above-mentioned spring sheet can be made of materials such as plastic or metal.

[0019] like Figure 2-3 As shown, an annular plate 23 coaxially arranged with the connecting section 12 is provided on the inner end surface of the fixing seat 2 corresponding to the circumference of the elastic sheet 22, and the end of the annular plate 23 is connected to the end of the connecting section 12 by a snap-fit ​​structure, and the inner wall of the annular plate 23 abuts against the outer wall of the connecting section 12, and a first conical convex portion 231 is provided on the inner side of the end of the annular plate 23, and a second conical convex portion 121 cooperating with the first conical convex portion 231 is provided on the outer wall of the end of the connecting section 12, and a fixing block 122 connected with the button 13 is provided on the side wall of the connecting section 12, and a slot 123 cooperating with the first conical convex portion 231 is formed between the fixing block 122 and the second conical convex portion 121.

[0020] The annular plate on the inner side of the above-mentioned fixing seat is coaxially arranged with the connecting section, the inner wall of the annular plate abuts against the outer wall of the connecting section, the button is connected to the side wall of the connecting section through the fixing block, and a slot matching with the first conical convex portion is formed between the side wall of the fixing block and the side wall of the second conical convex portion, the first conical convex portion and the second conical convex portion cooperate with each other to form a snap-fit ​​structure, the first conical convex portion is stuck in the slot, thereby fixing the connecting section and the fixing seat, and the assembly is more convenient.

[0021] like Figure 2 As shown, at least three spring pieces 22 are evenly distributed on the inner side of the opening 21 and are integrally formed with the fixing seat 2, and each spring piece 22 is inclined inwardly to form a conical structure. The inner diameter of the inner ring 221 formed by the spring pieces 22 is smaller than the outer diameter of the endoscope, and the length of the spring piece 22 is 2 mm. The above-mentioned spring pieces are arranged at the edge of the opening and are evenly distributed in a ring shape. The ends of the spring pieces are uniformly inclined inwardly to form a conical structure and enclose an inner ring for clamping the endoscope. When the endoscope enters the inner ring, the ends of the spring pieces form a squeezing force on the side wall of the endoscope, thereby clamping the endoscope.

Claims

1. A puncture needle, characterized in that: The invention comprises a hollow rod body (1), one end of which is provided with a puncture head (11), the other end of which is formed with a connecting section (12), the side wall of which is provided with a symmetrically arranged button (13), the side wall of which is provided with a fixing seat (2) which cooperates with the button (13), the end of which is provided with an opening (21) for an endoscope to extend therethrough, the inner edge of which is provided with a plurality of spring pieces (22) extending toward the opening of the connecting section (12), the spring pieces (22) mutually enclosing each other to form an inner circle (221) for an endoscope to pass therethrough.

2. The puncture needle according to claim 1, characterized in that: An annular plate (23) coaxially arranged with the connecting section (12) is provided on the inner end surface of the fixing seat (2) corresponding to the peripheral side of the elastic sheet (22), and the end of the annular plate (23) is connected to the end of the connecting section (12) via a snap-fit ​​structure.

3. The puncture needle according to claim 2, characterized in that: The inner wall of the annular plate (23) abuts against the outer wall of the connecting section (12); a first conical convex portion (231) is provided on the inner side of the end of the annular plate (23); a second conical convex portion (121) cooperating with the first conical convex portion (231) is provided on the outer wall of the end of the connecting section (12); a fixing block (122) connected to the key (13) is provided on the side wall of the connecting section (12); a clamping groove (123) cooperating with the first conical convex portion (231) is formed between the fixing block (122) and the second conical convex portion (121).

4. The puncture needle according to claim 1, characterized in that: At least three of the spring pieces (22) are evenly distributed inside the opening (21) and are integrally formed with the fixing seat (2).

5. The puncture needle according to claim 1 or 4, characterized in that: Each of the spring pieces (22) is inclined inwardly to form a cone-shaped structure, and the inner diameter of an inner circle (221) formed by the spring pieces (22) being mutually enclosed is smaller than the outer diameter of the endoscope.

6. The puncture needle according to claim 1 or 4, characterized in that: The length of the spring piece (22) is 1-3 mm.

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