CN115382091A

CN115382091A - Anti-drop luer locking connector

Info

Publication number: CN115382091A
Application number: CN202210862285.4A
Authority: CN
Inventors: 莫钢锋
Original assignee: Wenling Gangfeng Mould Co ltd
Current assignee: Wenling Gangfeng Mould Co ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-11-25

Abstract

The invention discloses an anti-drop Ruhr locking connector, which belongs to the technical field of medical appliances and comprises a connecting part with threads, wherein at least one bulge is arranged on the surface of the threads of the connecting part. The invention has the advantages of simple structure, good locking effect, capability of effectively preventing the luer connector from being loosened and even wholly falling off due to high-temperature deformation, bumping vibration, mistaken collision and the like, thereby avoiding the occurrence of drug leakage or failure and even serious medical accidents, strong universality and wide application range.

Description

Anti-drop luer locking connector

Technical Field

The invention relates to an anti-drop Ruhr locking connector, and belongs to the technical field of medical appliances.

Background

A luer is a standardized, micro-zero penetration fitting that is connected by a male luer and a matching female luer. The device is widely used in medical and laboratory instruments and is convenient connecting equipment used in the medical industry. Luer connectors are used as connection devices in the treatment of intravenous fluids, blood transfusions, intravascular imaging, and the like, which greatly simplifies the administration of liquid and gaseous medical fluids. With the development of medical science and the popularization of various diagnosis and treatment technologies, particularly the clinical application of new chemical medicines and advanced technologies in recent years, the application of the prefilled syringe is more and more extensive, the luer connector is also an indispensable structure in the prefilled syringe, and the prefilled syringe with the luer locking connector completes the long-term sealing and storage functions of the medicine through the luer locking protective cap matched with the prefilled syringe.

The first element of the luer connector is conical surface fit, the taper is 6%, in order to ensure the connection to be firm, the luer connector is also provided with a second element of threads, the second element of the luer connector is called a luer locking connector, and in practical application, the luer locking connector is mostly used. The existing luer locking connector has the problem that the luer locking connector is easy to loosen and fall off, and particularly when the luer locking connector is applied to a pre-filled syringe, the thread connection of the luer locking protective cap is easy to loosen or even wholly fall off due to high-temperature deformation, bumping and vibration and the like in high-temperature sterilization and transportation of the pre-filled syringe, so that medicine leakage or failure is caused, and if the luer locking protective cap falls off in the treatment processes of intravenous infusion, blood transfusion, intravascular radiography and the like, serious clinical accidents can be caused. Therefore, the design of an anti-drop luer locking connector is an urgent problem to be solved in the medical industry at present.

The prior Chinese special publication No. CN202342609U, 7.25.2012, discloses a pre-encapsulated syringe protective cap, which is a set consisting of a soft inner core and a hard outer sleeve, wherein the front part of the inner core is provided with a groove matched and sealed with the outer surface of a syringe conical head, and the front end of the outer sleeve is provided with an external thread which is matched and connected with a spiral connector on a syringe. The bottom surface of the groove on the inner core is provided with a conical protrusion which is matched and sealed with an inner hole of a conical head of the syringe. The groove on the protective cap inner core and the conical protrusion in the groove form internal and external dual sealing with the syringe conical head, the sealing effect is good, and the falling off can be effectively prevented. China with publication number CN203620005U specially adapted for 6/4/2014 discloses a protective cap for a prefilled syringe, which comprises a protective cap body, wherein a sealing sleeve is arranged inside one end of the body, which is opposite to the prefilled syringe, and a cavity matched with a needle of the prefilled syringe is arranged inside the sealing sleeve. And a sealing bulge is arranged on the inner top wall of the cavity. The sealing bulge is matched with the needle hole of the needle head of the pre-charging type syringe, and the sealing bulge can be clamped into the needle hole, so that the sealing effect is better improved, and the protective cap is prevented from falling off.

However, the apertures of the conical heads of different syringes are different, the protrusions in the protective cap cannot be adapted to different apertures, and the scheme is only suitable for luer connectors with end caps serving as protective caps or plugs, but not for luer connectors with two ends communicated for transmission media, and is poor in universality.

Disclosure of Invention

The technical problem to be solved by the invention is to overcome the problems and provide an anti-drop luer locking connector which is simple in structure, strong in universality and good in locking effect.

The technical scheme of the invention is as follows:

the utility model provides an anti-drop luer locking connects, includes threaded connecting portion, its characterized in that: the threaded surface of the connecting part is provided with at least one protrusion.

Further, in the above-described drop-proof luer lock fitting, the protrusion is located on a bottom or a top or a side of the thread.

Further, in the above anti-drop luer lock fitting, the protrusion is higher than the threaded surface by 0.05-0.15mm. The proper height can ensure that the threaded connection is firm and not loosened, and labor is saved when the threads are screwed out manually.

Preferably, in the anti-drop luer locking connector, two side surfaces of the protrusion along the spiral line direction are both inclined surfaces. The inclined plane is arranged to facilitate the screwing-in and screwing-out of the screw thread.

Preferably, in the above-described drop-proof luer lock fitting, the projection is provided at a position where the thread is close to the screw-on terminal end. The structure only needs labor in the last section when screwing in and the first section when screwing out, and does not need labor in the whole process, thereby not only ensuring firm connection without loosening, but also being convenient for use.

Further, in the above anti-drop luer locking connector, the thread is a double-thread having two spiral grooves and two teeth, the two spiral grooves or the two teeth are both provided with protrusions, and the number of the protrusions on the two spiral grooves or the two teeth is n, or n and n +1 respectively.

Further, in the above anti-drop luer lock connector, the luer lock connector is made of polypropylene material. The polypropylene belongs to a semi-rigid material, is not easy to fall off, has good sealing property, good heat resistance and chemical resistance, and higher safety.

One scheme of the anti-drop luer locking connector is that the thread is an external thread and is arranged on the outer surface of the connecting part, the connecting part is also provided with an inner conical hole with 6% taper, the screwing starting end of the external thread is close to the large-diameter end of the inner conical hole, and the screwing terminating end is close to the small-diameter end of the inner conical hole. This is the solution applied to female luer locking fittings.

Another scheme of the anti-drop luer locking connector is that the thread is an internal thread, the connecting portion comprises an internal thread collar with the internal thread and an external conical column with 6% taper coaxially arranged in the internal thread collar, the screwing starting end of the internal thread is close to the small diameter end of the external conical column, and the screwing terminating end is close to the large diameter end of the external conical column. This is the solution applied to male luer locking fittings.

The beneficial effects of the invention are:

1. the structure is simple, the thread surface of the luer locking joint is provided with the bulge, the mutual extrusion force between the threads can be increased, the locking effect is enhanced, the luer locking joint is effectively prevented from being loosened and even wholly falling off due to high-temperature deformation, bumping and vibration, mistaken collision and the like, and therefore the occurrence of drug leakage or failure and even serious medical accidents is avoided;

2. the scheme that the protrusions are arranged at the threads is not limited by the aperture of the conical head of the syringe, is suitable for a male luer connector with internal threads and a female luer connector with external threads, is suitable for a luer protective cap with a cover, is also suitable for a luer connector which is communicated with two ends and used for a transmission medium, and has strong universality and wide application range.

Drawings

Fig. 1 is a schematic structural diagram of a first embodiment of the present invention.

Fig. 2 is a perspective view of the first embodiment.

Fig. 3 is a schematic structural diagram of a second embodiment of the present invention.

In the figure: 1. a connecting portion; 1a, screwing an initial end; 1b, screwing a termination end; 10. a barrel; 11. an inner conical bore; 12. a helical groove; 13. teeth; 14. an internal thread collar; 15. an outer conical column; 2. a cover body; 21. anti-slip ribs; 3. and (4) protruding.

Detailed Description

The invention will now be further described with reference to the accompanying drawings and examples:

in the description of the present invention, it is to be understood that the terms "inside" and "outside" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, and thus, should not be construed as limiting the present invention.

Example one

As shown in fig. 1, the anti-drop luer lock connector provided in this embodiment is an externally threaded and capped female luer lock connector, and is used as a luer lock cap for a prefilled syringe, an indwelling needle, or an infusion set connector.

As shown in fig. 1 and 2, the luer lock connector is made of polypropylene material, and includes a connecting portion 1, wherein the outer surface of the connecting portion 1 is provided with an external thread, and the connecting portion 1 further has an internal tapered hole 11 with a taper of 6%. Here, a point where the thread starts to be screwed in is defined as a screwing starting point, the end is a screwing starting end point, a point where the thread reaches the bottom is a screwing end point, and the end is a screwing terminating end point. The screwing starting end 1a of the external thread is close to the large-diameter end of the inner conical hole 11, and the screwing terminating end 1b is close to the small-diameter end of the inner conical hole 11. This luer lock connects still includes lid 2, and lid 2 body coupling is in the one end that connecting portion 1 is close to interior circular cone hole 11 minor diameter end, is equipped with the anti-skidding rib 21 that a plurality of edge 2 outer peripheral face equipartitions of lid were extended along the axial on the outer peripheral face of lid 2, is convenient for revolve wrong helmet.

In order to prevent the luer locking joint from loosening and falling off in use, the surface of the external thread of the connecting part 1 is provided with at least one protrusion 3, the protrusion 3 is arranged at the position of the external thread close to the screwing terminal end 1a, and the protrusion 3 is positioned at the bottom or the top or the side of the spiral groove of the thread. The protrusion 3 is higher than the thread surface by 0.05-0.15mm, and two side surfaces of the protrusion along the spiral line direction are inclined surfaces. The general thread surface is equipped with two at least archs 3, and connecting portion 1 is whole to be the cylinder, and the projection of arch 3 on cylinder cross-section circle is evenly distributed on the cross-section circumference, and 3 evenly distributed of arch make the atress even, and structural performance is more stable. In this embodiment, the thread is a double-start thread, and has two spiral grooves 12 and two teeth 13, the protrusions 3 are located at the bottoms of the spiral grooves, the number of the protrusions is 4, specifically, the bottom of each spiral groove 12 is provided with two protrusions 3,4, the projections of the protrusions 3 on the circle of the section of the cylinder are uniformly distributed on the circumference of the section, and the adjacent intervals are 90 degrees.

Example two

This embodiment is substantially the same as the first embodiment, except that: as shown in fig. 3, the anti-drop luer lock connector provided in this embodiment is a male luer lock connector with an internal thread, and is used as a luer connector of a pre-filled syringe.

The specific differences are as follows: as shown in fig. 3, the luer lock connector includes a connector 1 without a cap, and the connector 1 is fixed to the front end of a barrel 10 of a prefilled syringe. The connecting part 1 comprises an internal thread clamping ring 14 with internal threads and an outer conical column 15 with 6% of conicity coaxially arranged in the internal thread clamping ring 14, wherein the outer conical column 15 is in a hollow tube structure and is used as an injection nozzle of the pre-filled syringe. The screwing starting end 1a of the internal thread is close to the small-diameter end of the outer conical column, the screwing terminating end 1b is close to the large-diameter end of the outer conical column 15, and the bulge 3 is arranged at the position of the internal thread close to the screwing terminating end 1b, namely close to the syringe barrel 10. The thread is double thread, has two helicla flute 12 and two tooth 13, and arch 3 is located the spiral tank bottom, and the quantity is 4, and the tank bottom of every helicla flute 12 all sets up two archs 3,4 projections of arch 3 on the cylinder cross-section circle evenly distributed on the cross-section circumference, adjacent interval 90 degrees.

Finally, it is understood that various other changes and modifications can be made by those skilled in the art based on the technical idea of the present invention, and all such changes and modifications should fall within the scope of the claims of the present invention.

Claims

1. The utility model provides an anti-drop luer locking connects, includes threaded connecting portion, its characterized in that: the threaded surface of the connecting part is provided with at least one protrusion.

2. The anti-drop luer lock fitting of claim 1, wherein: the protrusions are located on the bottom or crest or flanks of the helix of the thread.

3. The drop-resistant luer lock fitting of claim 1, wherein: the protrusion is 0.05-0.15mm higher than the thread surface.

4. The anti-drop luer lock fitting of claim 1, wherein: the two side faces of the protrusions in the spiral line direction are inclined planes.

5. The anti-drop luer lock fitting of claim 1, wherein: the protrusion is arranged at the position of the thread close to the screwing termination end.

6. The anti-drop luer lock fitting of claim 1, wherein: the screw thread is double thread, has two helicla flutes and two teeth, all sets up the arch on two helicla flutes or the tooth, and two helicla flutes or the protruding quantity of tooth are n, perhaps are n respectively, n + 1.

7. The drop-resistant luer lock fitting of claim 1, wherein: the luer locking connector is made of polypropylene materials.

8. A drop-proof luer lock fitting according to claim 1, 2, 3,4, 5, 6 or 7, wherein: the thread is an external thread and is arranged on the outer surface of the connecting part, the connecting part is also provided with an inner conical hole with 6% taper, the screwing starting end of the external thread is close to the large-diameter end of the inner conical hole, and the screwing terminating end is close to the small-diameter end of the inner conical hole.

9. The drop-proof luer lock fitting according to claim 1, 2, 3,4, 5, 6, or 7, characterized in that: the thread is the internal thread, connecting portion include that the internal thread rand that has this internal thread with locate coaxially the external cone post of the tapering 6% in the internal thread rand, the start end that closes soon of internal thread is close to the path end of external cone post, close end that closes soon is close to the path end of external cone post.