CN102488945A - Prefilled syringe protecting cap - Google Patents

Abstract

The invention relates to a prefilled syringe protecting cap, which is a set consisting of a soft inner core and a hard outer sleeve. A groove which is hermetically fit with the outer surface of a cone of the syringe is arranged in the front of the inner core, an annular clamping groove is arranged in the middle of the inner core circumferentially, an annular clamping step which is protruded and connected with the annular clamping groove on the inner core fittingly is arranged on the inner surface of the outer sleeve correspondingly, and an external thread is arranged at the front end of the outer sleeve and is matched and connected with a screw joint on the syringe. Besides, a conical projection is arranged on the bottom surface of the groove on the inner core and is hermetically fit with an inner hole of the cone of the syringe. The prefilled syringe protecting cap is simple and reasonable in structure, fine in sealing effect, reliable in connection and capable of effectively avoiding falling off, and accordingly is a perfect Luer lock protecting cap for prefilled syringes.

Description

A protective cap for a prefilled syringe

technical field

The invention relates to a medical device, in particular to a protective cap for a prefilled syringe.

Background technique

With the development of medical science and the promotion of various diagnosis and treatment techniques, especially the clinical application of new chemical drugs and high-tech in recent years, the application of prefilled syringes is becoming more and more extensive. Prefilled syringes with screw connectors are suitable for filling and using viscous liquid medicines, and the market demand for this product has increased significantly in recent years. Needle protection is especially important due to the drug product filled in prefilled syringes.

There are two types of protective caps commonly used in the market: hard caps and soft caps. The soft cap has good sealing performance, which can effectively prevent the liquid medicine from being contaminated, but it is easy to fall off; the hard cap is not easy to fall off, but the assembly is more troublesome, and the sealing performance is not easy to meet the requirements.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the above-mentioned prior art, and provide a prefilled syringe protective cap with simple and reasonable structure, reliable connection, effective prevention of falling off, good sealing performance, and safe and reliable use.

The technical solution adopted by the present invention to solve the above-mentioned technical problems is: a protective cap for prefilled syringes, which is characterized in that: it is a suit composed of a soft inner core and a hard outer cover, and the front part of the inner core is provided with a The outer surface of the cone head is matched with a sealed groove, and the middle of the inner core is provided with an annular card groove in the circumferential direction. thread, which mates with the screw connector on the syringe.

The grooves on the inner core of the present invention are tapered, wide at the front and narrow at the back.

The bottom surface of the groove on the inner core of the present invention is provided with a conical protrusion, which cooperates and seals with the inner hole of the cone head of the syringe.

The protective cap of the present invention is a suit composed of a soft inner core and a hard outer coat, and is sealed through the cooperation of the soft inner core and the outer surface of the cone head of the syringe, so that the sealing performance is good. In particular, the groove on the inner core and the conical protrusion in the groove form double internal and external seals with the cone head of the syringe, and the sealing effect is good. The inner core and the outer jacket are connected through the ring slot and the card table, and the hard outer jacket is connected with the screw joint on the syringe, and the connection is reliable, which can effectively prevent falling off. Compared with the prior art, the present invention has simple and reasonable structure, good sealing effect, reliable connection, can effectively prevent falling off, and effectively solves the problems of preventing falling off and sealing performance. An ideal luer lock cap for prefilled syringes.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a schematic structural view of the present invention.

Fig. 2 is a schematic diagram of the assembly of the present invention and the prefilled syringe.

The labels in the figure are: 1. Inner core, 2. Outer coat, 11. Annular card slot, 12. Conical protrusion, 13. Groove, 21. Ring card platform.

Detailed ways

It can be seen from Fig. 1 and Fig. 2 that a protective cap for a prefilled syringe is a suit assembled from a soft inner core 1 and a hard outer coat 2, and the front part of the soft inner core 1 is provided with Groove 13, the groove 13 at the front of the inner core has a taper, the front is wide and the rear is narrow, and it cooperates with the outer surface of the syringe cone to form a sealing effect. The bottom surface of the groove 13 at the front of the inner core is provided with a conical protrusion 12, which cooperates with the inner hole of the syringe cone to form a secondary sealing effect. In order to achieve the double effect of internal and external sealing, the sealing effect is good.

The middle of the inner core 1 is provided with an annular locking groove 11 in the circumferential direction, and the inner surface of the outer casing 2 is correspondingly provided with a protruding annular locking platform 21 cooperating with the annular locking groove 11 on the inner core. The front end of the jacket 2 is provided with an external thread, which is matched with the screw joint on the syringe. In this way, the two accessories are easy to assemble, have good cooperation, reliable connection, and can effectively prevent falling off.

The assembling process of the present invention is: assembling the soft inner core 1 to the hard outer shell 2 . Because the protruding annular card platform 21 of the overcoat 2 has a certain inclination, the soft inner core 1 is easy to enter, but will not retreat and slide out. When in use, the groove 13 of the inner core 1 is in contact with the outer surface of the syringe cone, and the soft inner core cooperates with the outer surface of the syringe cone to seal, especially the groove on the inner core and the conical protrusion in the groove are in contact with the syringe. The cone head forms a double seal inside and outside, and the sealing effect is good. The hard jacket is connected with the screw joint on the syringe, and the connection is reliable, which can effectively prevent falling off.

Claims (3)

1. pre-encapsulated injector helmet; It is characterized in that: the suit that it is made up of soft inner core and hard coat; Said inner core front portion is provided with the groove with syringe conehead outer surface fitted seal, and inner core middle part is circumferentially with annular slot, said overcoat inner surface correspondingly be provided with inner core on the annular snap platform of the protrusion that is connected of annular slot; The overcoat front end is provided with external screw thread, and the screwed union on itself and the syringe is connected.

2. pre-encapsulated injector helmet according to claim 1 is characterized in that: the groove on the said inner core has tapering, and is front wide and rear narrow.

3. pre-encapsulated injector helmet according to claim 1 is characterized in that: the bottom surface of the groove on the said inner core is provided with conical projections, with syringe conehead endoporus fitted seal.

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