Needleless infusion connector
By designing a cylindrical protrusion and groove structure on the outer shell of the needleless infusion connector, the problem of unstable connection is solved, and a more stable infusion connection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WEIHAI JIERUI MEDICAL PRODUCTS CO LTD
- Filing Date
- 2024-12-26
- Publication Date
- 2026-04-14
AI Technical Summary
Existing needleless infusion connectors are prone to loosening or being difficult to tighten properly when connected to external infusion lines due to their small size, resulting in unstable connections.
A needleless infusion connector was designed. The hollow cavity of the outer shell is equipped with a sealing plug and a capsule. The outer shell is equipped with a threaded connection part. The threaded groove has a cylindrical protrusion. The outer wall of the outer shell has a concave long groove to increase friction. The design of the cylindrical protrusion and groove improves the self-locking effect.
The increased friction of the threaded connection ensures connection stability, facilitates tightening and disassembly by the operator, and improves product reliability.
Smart Images
Figure CN224113074U_ABST
Abstract
Description
Technical fields:
[0001] This utility model relates to the field of medical device manufacturing technology, specifically a disposable needleless infusion connector for medical use that has a reasonable structure, is easy to operate, and can improve the connection stability of infusion connectors. Background technology:
[0002] The disposable needle-free closed infusion connector for medical use is a drug transfer component suitable for mechanically preventing environmental transfer into the system and leakage of hazardous drugs or vapor concentrates outside the system. The product includes a connector housing with an inlet at one end and an outlet at the other. For easy connection to the infusion line, both ends of the connector housing are equipped with medical Luer threads, allowing for quick connection to the infusion line during use. Furthermore, to ensure a rapid establishment of an infusion line corresponding to the external infusion tubing after connection, the housing contains a capsule assembly. When the connector is not connected, the capsule assembly is in an extended state, pushing a sealing plug to the outlet of the infusion line, thus sealing the outlet. When the connector is connected to the external infusion line, the sealing plug retracts into the housing, compressing the capsule and opening the outlet.
[0003] At present, needleless infusion connectors are small in size, and their connection with external infusion tubing is mainly achieved by the threaded connection at both ends. During the tightening process, due to the small size of the components, it is not easy to hold and apply force, which can easily lead to problems such as incomplete tightening or loosening. Summary of the Invention:
[0004] This invention addresses the shortcomings and deficiencies of existing technologies by proposing a medical disposable needleless infusion connector that is structurally sound, easy to operate, and improves the connection stability of infusion connectors.
[0005] This utility model achieves its purpose through the following measures:
[0006] A needle-free infusion connector includes a shell with a hollow cavity. Inside the hollow cavity of the shell are a sealing plug, a capsule, and a capsule telescopic support. The capsule is made of elastic medical-grade silicone and is positioned along the central axis of the shell. The capsule telescopic support is coaxial with the capsule, and the tail of the capsule has a guide sleeve that engages with the capsule telescopic support. The sealing plug is used to seal the outlet end of the shell. The connector is characterized by a threaded connection portion on the outside of the shell corresponding to the outlet end, with a threaded groove and a cylindrical protrusion within the threaded groove.
[0007] The cylindrical protrusion of this invention is arranged along the width direction of the threaded groove. Furthermore, the cross-section of the cylindrical protrusion can be semi-circular.
[0008] The threaded groove of the threaded connection part of this utility model is provided with two cylindrical protrusions. The two cylindrical protrusions are symmetrically arranged on both sides of the threaded connection part. When the needleless infusion connector is connected to the external infusion pipeline equipment through the threaded connection part, the tip of the internal thread tooth will contact the cylindrical protrusion in the threaded groove of the threaded connection part and undergo extrusion deformation, which will increase the friction and play an auxiliary self-locking role. The cylindrical protrusions on both sides of the threaded groove can further improve the self-locking effect.
[0009] The outer wall of this utility model has concave long ridges evenly distributed along the circumference to increase the surface area and increase friction during use.
[0010] Compared with the prior art, this utility model optimizes the structure by adding cylindrical protrusions on both sides of the threaded groove, which increases friction during threaded connection and plays an auxiliary self-locking role, ensuring product reliability and making it convenient for operators to use. By adding multiple recessed long grooves to the outer surface, the contact area of the operator's fingers is increased when pinching, and a large friction is generated when screwing in, making it easy to complete the assembly or disassembly process. Attached image description:
[0011] Appendix Figure 1 This is a schematic diagram of the structure of this utility model.
[0012] Reference numerals: 1. Outer shell; 2. Sealing plug; 3. Threaded connection; 4. Threaded groove; 5. Cylindrical protrusion; 6. Long ridge groove. Detailed implementation method:
[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0014] Example:
[0015] As attached Figure 1 As shown, this example provides a self-locking, easy-to-tighten needleless infusion connector, which has a shell 1 with a hollow cavity. Inside the hollow cavity of the shell 1, there is a sealing plug 2, a capsule, and a capsule telescopic support. The capsule is made of elastic medical silicone and is set along the central axis of the shell. The capsule telescopic support is coaxial with the capsule, and the tail of the capsule has a guide sleeve that fits into the capsule telescopic support. The sealing plug 2 is used to seal the liquid outlet end of the shell. The outside of the shell 1 has a threaded connection part 3 corresponding to the liquid outlet end. The threaded connection part 3 has a threaded groove 4, and a cylindrical protrusion 5 is provided in the threaded groove 4.
[0016] The cylindrical protrusion 5 of this utility model is arranged along the width direction of the threaded groove 4. Furthermore, the cross-section of the cylindrical protrusion 5 can be semi-circular.
[0017] The threaded connection part 3 of this utility model has two cylindrical protrusions 5 in the threaded groove 4. The two cylindrical protrusions 5 are symmetrically arranged on both sides of the threaded connection part 3. When the needleless infusion connector is connected to the external infusion pipeline equipment through the threaded connection part, the tip of the internal thread tooth will contact the cylindrical protrusion 5 in the threaded groove 4 of the threaded connection part and undergo extrusion deformation, which will increase the friction and play an auxiliary self-locking role. The cylindrical protrusions on both sides of the threaded groove can further improve the self-locking effect.
[0018] The outer wall of the outer shell 1 of this utility model has concave long ridge grooves 6 evenly distributed along the circumference to increase the surface area and increase the friction during use.
[0019] Compared with the prior art, this utility model optimizes the structure by adding cylindrical protrusions on both sides of the threaded groove, which increases friction during threaded connection and plays an auxiliary self-locking role, ensuring product reliability and making it convenient for operators to use. By adding multiple recessed long grooves to the outer surface, the contact area of the operator's fingers is increased when pinching, and a large friction is generated when screwing in, making it easy to complete the assembly or disassembly process.
Claims
1. A needle-free infusion connector, comprising a shell with a hollow lumen, wherein a sealing plug, a capsule, and a capsule telescopic support are disposed within the hollow lumen of the shell, wherein the capsule is made of elastic medical-grade silicone and is arranged along the central axis of the shell, the capsule telescopic support is coaxially arranged with the capsule, and the tail end of the capsule is provided with a guide sleeve that engages with the capsule telescopic support, and the sealing plug is used to seal the outlet end of the shell, characterized in that, The outer shell has a threaded connection part corresponding to the liquid outlet end. The threaded connection part has a threaded groove and a cylindrical protrusion inside the threaded groove.
2. The needleless infusion connector according to claim 1, characterized in that, The cylindrical protrusion is arranged along the width direction of the threaded groove.
3. The needleless infusion connector according to claim 1, characterized in that, The cylindrical protrusion has a semi-circular cross-section.
4. The needleless infusion connector according to claim 3, characterized in that, The threaded groove of the threaded connection part is provided with two cylindrical protrusions, which are symmetrically arranged on both sides of the threaded connection part. When the needleless infusion connector is connected to the external infusion pipeline equipment through the threaded connection part, the tip of the internal thread tooth will contact the cylindrical protrusion in the threaded groove of the threaded connection part and undergo extrusion deformation, which will increase the friction and play an auxiliary self-locking role. The cylindrical protrusions on both sides of the threaded groove can further improve the self-locking effect.
5. The needleless infusion connector according to claim 1, characterized in that, The outer wall of the casing has concave long grooves evenly distributed along its circumference to increase the surface area and thus increase friction during use.