Puncture trocar assembly
By setting a gradient transition section and groove structure on the needle and needle of the laparoscopic surgical instrument, the problem of easy jamming of the needle tube during the puncture process is solved, and the smooth assembly and use of the surgical instrument is achieved, reducing the difficulty of surgery.
Patent Information
- Application Number
- CN202420559799.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-22
- Publication Date
- 2025-01-07
- Estimated Expiration
- 2034-03-22
AI Technical Summary
In minimally invasive surgery, the needles and syringes of existing laparoscopic surgical instruments are easily stuck by human skin and muscles during the puncture, which increases the difficulty of the operation.
A puncture trocar assembly is designed to improve the assembly method of the needle tube to prevent lag and jam by setting a gradient transition section and groove structure on the surface of the needle tube and needle. Specifically, it includes setting a first gradient transition section at the end of the thread of the needle tube, setting a second gradient transition section and groove at the other end of the needle tube, and setting a third gradient transition section at the tail of the needle to ensure that the needle tube is assembled smoothly when inserted.
It effectively avoids the problem of the syringe being stuck by the skin and muscles during the puncture process, ensures the smooth assembly and use of surgical instruments, and reduces the difficulty of surgery.
Smart Images
Figure CN222303988U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of medical instruments, in particular to a puncture trocar assembly. Background Art
[0002] In current laparoscopic surgical instruments, the combined use of a needle and a needle tube does not require consideration of puncturing directly on human tissue; therefore, the design of the needle and the needle tube has always adopted a conventional combined design.
[0003] With the actual clinical needs and the demand for minimally invasive surgery, surgical instruments need to be improved and upgraded to ensure that the instruments can be assembled during the operation. In the existing combined laparoscopic surgical instruments, there is a problem of the needle being stuck in the skin during the puncture process, which increases the difficulty of puncture and the difficulty of surgery. Utility Model Content
[0004] The utility model aims to design a puncture needle assembly, which improves the problem of the needle tube being stuck by human skin and muscle during the puncture process by improving the surface structure of the needle tube.
[0005] Another object of the utility model is to improve the surface structure of the needle tube and the needle so as to prevent the needle tube and the needle from being stuck when they are combined with other components for use.
[0006] In order to achieve the above purpose, this application adopts the following technical solutions:
[0007] A puncture needle assembly comprises a needle tube with two ends through and a solid needle, wherein the needle comprises a needle tip and a needle tail, and a threaded section is arranged on the needle tip. The needle can be inserted into and partially pass through the needle tube. A thread is arranged on the circumferential surface of one end of the needle tube, and a first gradual transition section is arranged along the axial direction on the tube wall where the thread ends.
[0008] In the above technical solution, the first gradual transition section gradually changes from the root of the thread teeth toward the maximum circumferential surface of the tube wall.
[0009] In the above technical solution, a second gradual transition section is arranged along the axial direction on the tube wall of the other end of the needle tube.
[0010] In the above technical solution, the second gradual transition section gradually changes from the end of the needle tube toward the thread direction.
[0011] In the above technical solution, the first gradual transition section and the second gradual transition end have opposite gradual directions.
[0012] In the above technical solution, the diameter of the needle tail is larger than other parts of the needle, and a third gradual transition section is provided along the spherical structure of the needle tail toward the needle tip.
[0013] In the above technical solution, the third gradual transition section gradually changes from the spherical structure toward the needle tip.
[0014] In the above technical solution, after the needle is inserted into the needle tube, the gradient direction of the third gradient transition section is consistent with that of the second gradient transition section.
[0015] In the above technical solution, when the needle is inserted into the needle tube, the maximum diameter of the needle tail is consistent with the maximum diameter of the needle tube, and a groove for limiting is provided between the second gradual transition section and the first gradual transition section of the needle tube.
[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the utility model are:
[0017] By improving the structure of the needle tube end and setting a gradual end at the end of the thread, it is possible to prevent the formation of grooves between the thread teeth and the tube wall, thereby preventing the needle tube from being stuck in the skin and muscles during the puncture process due to the grooves;
[0018] By improving the other end of the needle tube to make it have a gradual shape, the needle tube can be prevented from being stuck when being inserted into the opposite end, so that the needle tube can be assembled smoothly. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] The present invention will be described by way of examples with reference to the accompanying drawings, in which:
[0020] Figure 1 It is a schematic diagram of the structure of the needle tube;
[0021] Figure 2 It is a schematic diagram of the structure of the needle;
[0022] Figure 3 It is a schematic diagram of the structure after the needle and the needle tube are combined;
[0023] Among them: 1 is the tube body, 1-1 is the threaded section, 1-2 is the first gradual transition section, 1-3 is the tail of the tube body, 1-4 is the second gradual transition section, 1-5 is the groove, 2 is the needle body, 2-1 is the threaded section, 2-2 is the tail of the needle body, and 2-3 is the third gradual transition section. DETAILED DESCRIPTION
[0024] All features disclosed in this specification, or steps in all methods or processes disclosed, except mutually exclusive features and / or steps, can be combined in any manner.
[0025] Any feature disclosed in this specification (including any additional claims, abstract and drawings), unless otherwise stated, may be replaced by other equivalent or alternative features with similar purposes. That is, unless otherwise stated, each feature is only an example of a series of equivalent or similar features.
[0026] like Figure 1 As shown, the needle tube of this embodiment has a tube body 1, a threaded section 1-1 is arranged at one end of the tube body 1, and a first gradual transition section 1-2 is arranged at the end of the threaded section 1-1, starting from the root of the thread teeth along the axial direction toward the other end of the tube body 1. The first gradual transition section 1-2 makes the surface of the tube body 1 after the threaded section 1-1 smooth, without grooves or slot structures, so that the skin or muscle can be smoothly inserted along the first gradual transition section 1-2 during the puncture process.
[0027] A groove structure is arranged at the other end of the tube body 1, and one end of the groove structure is the tube body tail 1-3, and the tube body tail 1-3 is provided with a second gradual transition section 1-4 from the end to the threaded section 1-1. The purpose of the second gradual transition section 1-4 is that when the tube body 1 is inserted into other tubular structures, because the inner diameter of the other tubular structure is consistent with the outer diameter of the tube body 1, the second gradual transition section 1-4 can play a good guiding role, guiding the tube body 1 to insert into other tubular structures. This prevents the tube body 1 from being stuck by other tubular structures when there is no second gradual transition section 1-4.
[0028] A groove 1-5 is provided between the second gradual transition section 1-4 and the first gradual transition section 1-2 on the tube body 1. The groove is used to limit the axial position of the tube body 1 to prevent axial sliding. At the same time, by limiting the position of the tube body 1, the axial movement position of the needle body 2 is limited by the tube body 1 through the tail 2-2 of the needle body 2.
[0029] like Figure 2 As shown, the needle in this embodiment includes a needle body 2, one end of the needle body 2 is a needle tip 2-1, and a threaded section 2-1 is arranged on the needle tip. The threaded section 2-1 of the needle tip can make the needle body 2 be assembled and connected with the surgical forceps. The outer end of the tail 2-2 of the needle body is a spherical structure, and a third gradual transition section 2-3 is arranged axially from the spherical body along the tail 2-2 of the needle body. The purpose of the third gradual transition section 2-3 is to have a good guiding effect when the needle body 2 is inserted into the tubular structure during assembly with other parts, so as to avoid the phenomenon of jamming of the right-angled edge of the traditional structure.
[0030] like Figure 3 As shown, after the needle body 2 is inserted into the tube body 1, the needle body 2 can move axially inside the tube body 1. Through the structure of the needle body 2 and the tube body 1 combined with the common sense of use in this field, both ends of the tube body 1 need to be fixed with other components, and the two ends of the needle body 1 can move after being connected to other components.
[0031] In this embodiment, the second gradual transition section 1-4 and the third gradual transition section 2-3 have the same gradual change direction, while the first gradual transition section 1-2 has the opposite gradual change direction. All the gradual transition sections change from the smallest diameter to the largest diameter.
[0032] In the structure of this embodiment, the diameter of the needle body 2 is very small and can directly puncture human tissue, and the tube body 1 can also puncture into the body along the puncture hole under the condition that the needle body 2 has already punctured.
[0033] The present invention is not limited to the above-mentioned specific implementation modes, but extends to any new features or any new combination disclosed in this specification, as well as any new method or process steps or any new combination disclosed.
Claims
1. A puncture needle assembly, comprising a needle tube with two ends through and a solid needle, the needle comprising a needle tip and a needle tail, a threaded section being arranged on the needle tip, the needle being able to be inserted into and partially pass through the needle tube, characterized in that: A thread is arranged on the circumferential surface of one end of the needle tube, and a first gradual transition section is arranged along the axial direction on the tube wall where the thread ends.
2. A puncture trocar assembly according to claim 1, characterized in that: The first gradual transition section gradually changes from the root of the thread teeth toward the maximum circumferential surface of the tube wall.
3. A puncture needle assembly according to claim 1, characterized in that: A second gradual transition section is arranged along the axial direction on the tube wall of the other end of the needle tube.
4. A puncture needle assembly according to claim 3, characterized in that The second gradual transition section gradually changes from the end of the needle tube toward the thread direction.
5. A puncture trocar assembly according to claim 4, characterized in that: The first gradual transition section and the second gradual transition end have opposite gradual directions.
6. The puncture needle assembly according to claim 1, characterized in that: The diameter of the needle tail is larger than other parts of the needle, and a third gradual transition section is arranged along the spherical structure of the needle tail toward the needle tip.
7. A puncture trocar assembly according to claim 6, characterized in that: The third gradual transition section gradually changes from the spherical structure toward the needle tip.
8. The puncture trocar assembly according to claim 6, characterized in that: When the needle is inserted into the needle tube, the third gradual transition section has the same gradual change direction as the second gradual transition section.
9. A puncture trocar assembly according to any one of claims 1 to 8, characterized in that When the needle is inserted into the needle tube, the maximum diameter of the needle tail is consistent with the maximum diameter of the needle tube, and a groove for limiting is arranged between the second gradual transition section and the first gradual transition section of the needle tube.