Glue-free and solvent-free laser welding of medical delivery tubing

Abstract

This utility model relates to the technical field of medical devices, providing a glue-free and solvent-free laser-welded medical delivery tubing, including a connector and a delivery tube. The connector includes a connector body and a connector connecting part that are fixedly connected, with a fastener on the outer wall of the connector connecting part near the connector body. The delivery tube includes a delivery tube body and a delivery tube connecting part that are fixedly connected, with a fastener on the inner wall of the delivery tube connecting part away from the delivery tube body. The delivery tube connecting part is sleeved on the outside of the connector connecting part, and the fastener engages with the fastener. The inner wall of the delivery tube connecting part and the outer wall of the connector connecting part are in close contact and sealed by laser welding. The use of fasteners and fasteners combined with laser welding replaces the traditional glue curing process, avoiding the volatilization of VOCs caused by glue and improving the safety of medical device use. Laser welding eliminates the need for air drying and curing time, increasing production capacity, reducing manual operation, and enabling automated production.

Description

Technical Field

[0001] This utility model relates to the technical field of medical devices, and more specifically, to a laser-welded medical transmission pipeline that is glue-free and solvent-free. Background Technology

[0002] Transmission tube connector assemblies are used to connect with medical devices. Existing medical transmission tube and connector assembly processes generally use adhesives (such as UV adhesives, quick-drying adhesives, etc.) for curing. The adhesive curing process has the problem of VOC substances volatilizing after assembly, which poses a safety risk. At the same time, the adhesive curing process requires a certain amount of time to air dry and cure, which is not conducive to rapid product production. Utility Model Content

[0003] The purpose of this invention is to provide a laser-welded medical transmission tubing that is glue-free and solvent-free, in order to solve the technical problems of long drying time and VOC volatilization caused by the use of glue for curing medical transmission tubing and connectors in the prior art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] This utility model provides a glue-free and solvent-free laser-welded medical transmission tubing, comprising:

[0006] The connector includes a connector body and a connector connecting part that are fixedly connected, and the outer wall of the connector connecting part near one end of the connector body is provided with a fastener.

[0007] A transmission pipe, comprising a transmission pipe body and a transmission pipe connecting part fixedly connected, wherein a fastener is provided on the inner wall of the end of the transmission pipe connecting part away from the transmission pipe body;

[0008] The transmission pipe connection is sleeved on the outside of the connector connection, the fastener is fastened to the fastener, and the inner wall of the transmission pipe connection is in close contact with the outer wall of the connector connection and is sealed by laser welding.

[0009] According to the above-described glue-free and solvent-free laser welding medical transmission pipeline, the fastening position is a groove position circumferentially disposed on the outer wall of the connector connection part;

[0010] The fastener is an annular protrusion formed by bending the transmission pipe connection part inward. Correspondingly, the outer wall of the transmission pipe connection part forms a corresponding notch, and the cross-section of the annular protrusion is wedge-shaped.

[0011] According to the above-described glue-free and solvent-free laser-welded medical transmission tubing, the end of the transmission tubing connection furthest from the transmission tubing body and the fastener are both located within the fastening position.

[0012] According to the above-described glue-free and solvent-free laser welding medical transmission pipeline, the end of the connector connection away from the connector body is provided with a guide portion.

[0013] According to the above-described glue-free and solvent-free laser-welded medical transmission pipeline, the outer wall of the connector body is provided with multiple anti-slip strips.

[0014] According to the above-described glue-free and solvent-free laser-welded medical transmission tubing, the connection part of the transmission tubing is a transparent or semi-transparent plastic part.

[0015] According to the above-described glue-free and solvent-free laser-welded medical transmission tubing, the connector part is a semi-transparent or opaque plastic component.

[0016] According to the above-described glue-free and solvent-free laser-welded medical transmission tubing, the wall thickness of the connection part of the transmission tubing is no more than 4mm.

[0017] According to the above-described glue-free and solvent-free laser welding medical transmission pipeline, the laser light source wavelength for laser welding is 800nm ​​to 1000nm.

[0018] According to the above-described glue-free and solvent-free laser welding medical transmission pipeline, the laser welding uses an 808nm laser light source, or the laser welding uses a 980nm laser light source.

[0019] The beneficial effects of the glue-free and solvent-free laser-welded medical transmission tubing provided by this utility model are at least as follows:

[0020] This utility model provides a glue-free and solvent-free laser-welded medical transmission tubing. It employs a fastener and connector assembly using laser welding, replacing the traditional glue curing process. This avoids the volatilization of VOCs caused by glue, improving the safety of medical device use. Laser welding eliminates the need for air drying and curing time, shortening manufacturing time, increasing production capacity, reducing manual operation, and enabling automated production. Laser welding ensures high weld strength and aesthetics, providing advantages such as sealing, airtightness, and watertightness. It also strengthens the connection between the two components, meeting the sealing and tensile strength requirements of the transmission tubing and connector. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A three-dimensional structural diagram of the glue-free and solvent-free laser-welded medical transmission pipeline provided by this utility model;

[0023] Figure 2 A schematic diagram of the local structure of the explosion-free, solvent-free laser-welded medical transmission pipeline provided by this utility model;

[0024] Figure 3 A partial cross-sectional structural diagram of the glue-free and solvent-free laser-welded medical transmission pipeline provided by this utility model.

[0025] The following are the labeling elements in the figure:

[0026] 100. Laser-welded medical transmission tubing without glue or solvents; 10. Connector; 11. Connector body; 12. Connector connection part; 13. Fastener; 14. Guide part; 15. Anti-slip strip; 20. Transmission tube; 21. Transmission tube body; 22. Transmission tube connection part; 23. Fastener; 24. Notch; 30a. First welding position; 30b. Second welding position. Detailed Implementation

[0027] To make the technical problem to be solved, the technical solution, and the beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this utility model and are not intended to limit this utility model.

[0028] It should be noted that when a component is referred to as "fixed to" or "set on" another component, it may be directly or indirectly located on that other component. When a component is referred to as "connected to" another component, it may be directly or indirectly connected to that other component. The terms "upper," "lower," "left," "right," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate orientations or positions based on the accompanying drawings, and are for ease of description only, and should not be construed as limiting the technical solution. 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 technical features. "A plurality" means two or more, unless otherwise explicitly defined.

[0029] Please see Figure 1 This embodiment provides a glue-free and solvent-free laser-welded medical transmission line 100 for connection with medical devices, comprising a connector 10 and a transmission tube 20. Please refer to... Figure 2 and Figure 3The connector 10 includes a connector body 11 and a connector connecting portion 12 fixedly connected. A fastening position 13 is provided on the outer wall of the connector connecting portion 12 near the end of the connector body 11. The transmission pipe 20 includes a transmission pipe body 21 and a transmission pipe connecting portion 22 fixedly connected. A fastener 23 is provided on the inner wall of the end of the transmission pipe connecting portion 22 away from the transmission pipe body 21. The transmission pipe connecting portion 22 is sleeved on the outside of the connector connecting portion 12. The fastener 23 engages with the fastening position 13. The inner wall of the transmission pipe connecting portion 22 is in close contact with the outer wall of the connector connecting portion 12, and a sealed assembly is achieved by laser welding. Optionally, laser welding can weld one circle. Optionally, laser welding can weld at least two circles, including at least a first welding position 30a and a second welding position 30b, which makes the sealed connection more reliable.

[0030] The transmission tube connector 22 is fitted over the connector connector 12 until the fastener 23 and the fastener 13 engage to provide a tight fit, preventing them from coming loose and meeting the tensile requirements of the transmission tube 20 and the connector 10. Then, laser welding is used to weld the inner wall of the transmission tube connector 22 to the outer wall of the connector connector 12, ensuring effective energy transfer between the components. This embodiment uses the fastener 23 and the fastener 13 in conjunction with laser welding, replacing the traditional glue curing process. This avoids the volatilization of VOCs caused by glue, improving the safety of medical device use. Laser welding eliminates the need for air drying and curing time, shortening manufacturing time, increasing production capacity, reducing manual operation, and enabling automated production. Laser welding ensures high weld strength and aesthetics, providing advantages such as sealing, airtightness, and watertightness, while also strengthening the connection between the two components, meeting the sealing and tensile requirements of the transmission tube 20 and the connector 10.

[0031] In one embodiment, see Figure 2 and Figure 3 The buckle 13 is a groove circumferentially disposed on the outer wall of the connector connection 12; the fastener 23 is an annular protrusion formed by bending the transmission pipe connection 22 inward. Correspondingly, the outer wall of the transmission pipe connection 22 forms a corresponding notch 24, which simplifies the manufacturing process of the fastener 23. Moreover, the cross-section of the annular protrusion is wedge-shaped, which makes it easy for the fastener 23 to be quickly installed into the buckle 13, and it is also very convenient and labor-saving to disassemble.

[0032] In one embodiment, see Figure 2 and Figure 3The end of the transmission pipe connection part 22 away from the transmission pipe body 21 and the fastener 23 are both located in the fastening position 13, so that after the fastener 23 is fastened and connected to the fastening position 13, the connection between the transmission pipe connection part 22 and the connector connection part 12 has a simple and beautiful structure.

[0033] In one embodiment, the end of the connector connection portion 12 away from the connector body 11 is provided with a guide portion 14. The guide portion 14 facilitates the quick and accurate insertion of the connector connection portion 12 into the transmission tube connection portion 22.

[0034] In one embodiment, the wall thickness of the transmission pipe connection 22 is no more than 4 mm, while the wall thickness of the connector connection 12 is not limited.

[0035] Optionally, the wall thickness of the transmission pipe connection portion 22 is 4 mm. Optionally, the wall thickness of the transmission pipe connection portion 22 is 3 mm. Optionally, the wall thickness of the transmission pipe connection portion 22 is 2 mm. It should be understood that the wall thickness of the transmission pipe connection portion 22 is not limited to the above situations, and other situations are also possible, which are not limited here.

[0036] In one embodiment, see Figure 2 The outer wall of the connector body 11 is provided with multiple anti-slip strips 15. The anti-slip strips 15 increase the friction of gripping the connector 10, thereby improving the stability of gripping the connector 10.

[0037] In one embodiment, the laser source for laser welding has a wavelength of 800nm ​​to 1000nm, a power of 100W, and a time of instantaneous movement. Optionally, the laser welding uses an 808nm laser source. Optionally, the laser welding uses a 980nm laser source.

[0038] In one embodiment, the transmission tube connection 22 is a transparent or translucent plastic part, and the connector connection 12 is a translucent or opaque plastic part.

[0039] Since the transmission tube connector 22 is sleeved on the outside of the joint connector 12, it is located on the surface. The surface transmission tube connector 22 is made of transparent or semi-transparent plastic to facilitate the laser beam's penetration into the welding layer. Correspondingly, the joint connector 12 is located inside the transmission tube connector 22, that is, in the inner layer. The inner joint connector 12 is made of semi-transparent or opaque plastic to facilitate the absorption of laser energy, which is then converted into heat energy to melt and bond the molded parts together.

[0040] The laser penetrates the transparent or semi-transparent surface layer of the transmission tube connection 22, reaching the welding layer between the transmission tube connection 22 and the connector connection 12. The inner semi-transparent or opaque connector connection 12 absorbs energy and converts it into heat energy. Sufficient volume absorbs the heat and plasticizes the polymer through the component, causing the outer wall of the tightly contacting connector connection 12 and the inner wall of the transmission tube connection 22 to fuse and bond together. The entire circle of welding is performed on the outer wall of the connector connection 12 and the inner wall of the transmission tube connection 22, completing the sealed assembly.

[0041] Optionally, the material of the transfer pipe connection 22 is the same as the material of the connector connection 12. Optionally, the material of the transfer pipe connection 22 is different from the material of the connector connection 12. When the two materials are different, the overlapping melting temperature of the two materials needs to be considered.

[0042] Optionally, the material of the connector 12 is PC, PE, ABS, PPUS, PET, PMMA, PCTG, POM, PA6, PA66, PA, PP, Silicon, PVC, PS, HDPE, LDPE, K-Resin, PETG, TPE, LLDPE, HIPS, PBT, PA+GF30%, PP+GF30%, POM+GF30%, ABS+GF30%, or PC+GF30%.

[0043] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A laser-welded medical transmission tubing without glue or solvents, characterized in that, include: The connector includes a connector body and a connector connecting part that are fixedly connected, and the outer wall of the connector connecting part near one end of the connector body is provided with a fastener. A transmission pipe, comprising a transmission pipe body and a transmission pipe connecting part fixedly connected, wherein a fastener is provided on the inner wall of the end of the transmission pipe connecting part away from the transmission pipe body; The transmission pipe connection is sleeved on the outside of the connector connection, the fastener is fastened to the fastener, and the inner wall of the transmission pipe connection is in close contact with the outer wall of the connector connection and is sealed by laser welding.

2. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The fastening position is a groove that is circumferentially disposed on the outer wall of the connector connection part; The fastener is an annular protrusion formed by bending the transmission pipe connection part inward. Correspondingly, the outer wall of the transmission pipe connection part forms a corresponding notch, and the cross-section of the annular protrusion is wedge-shaped.

3. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The end of the transmission pipe connection that is away from the transmission pipe body and the fastener are both located within the fastening position.

4. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The connector connection part is provided with a guide part at the end away from the connector body.

5. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The outer wall of the connector body is provided with multiple anti-slip strips.

6. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The connection part of the transmission tube is a transparent or semi-transparent plastic part.

7. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 6, characterized in that, The connector connection part is a semi-transparent or opaque plastic part.

8. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The wall thickness of the transmission pipe connection is no more than 4 mm.

9. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The laser light source used in the laser welding has a wavelength of 800nm ​​to 1000nm.

10. The glue-free and solvent-free laser-welded medical transmission tubing according to claim 1, characterized in that, The laser welding uses an 808nm laser light source, or the laser welding uses a 980nm laser light source.

Images