CN205994815U - The pre-charge injector of slip-off preventing - Google Patents

Abstract

The utility model provides an anti-falling prefilled syringe, which includes a casing, a push rod and a piston that are slidably arranged in the casing, a Luer joint is provided on the top of the casing, an adapter is provided on the outside of the Luer connection, and an inner wall is provided on the inner wall of the adapter. Thread, the root of the Luer connector is provided with a card slot, the rear end of the card slot is connected to the top of the jacket, the front end of the card slot is connected to the rear end of the Luer connector, and the diameter of the card slot is smaller than the diameter of the proximal end of the Luer connector , the inner side wall of the rear end of the adapter is provided with a protrusion matching the card slot, the protrusion and the card slot are in an interference fit, and at the same time, the proximal end of the card slot is bonded to the adapter with a cured adhesive layer, and the cured adhesive layer One side of the cured adhesive layer is connected with the proximal surface of the slot, and the other side of the cured adhesive layer is connected with the inner side wall of the protrusion. The beneficial effect of the utility model is to solve the problems of loosening and falling off of the syringe with the Luer lock joint during use, and provide a prefilled syringe with a simple structure, safety and reliability that prevents falling off.

Description

Anti-drop prefilled syringe

technical field

The utility model belongs to the field of medical equipment, in particular to a fall-off preventing prefilled syringe.

Background technique

The pre-filled syringe is a new type of pharmaceutical packaging container with high technical content, suitable for injections and injections. The pre-filled syringe is to directly fill the injection medicine in the syringe, and the syringe and the liquid medicine packaging container are combined into one, and it is very convenient to inject directly during use.

With the development of medical science and the promotion of various diagnosis and treatment techniques, especially the clinical application of new drugs and high-tech in recent years, the application of prefilled syringes is becoming more and more extensive. Prefilled syringes with Luer lock connectors are suitable for the filling and use of viscous liquid medicines, and the market demand for this product has increased significantly in recent years.

Since the jacket of the prefilled syringe is made of glass, the shape cannot be processed arbitrarily. Therefore, if the current prefilled syringe is to be made into a product with a Luer lock connector, it is necessary to install a screw with an internal thread on the cone head of the glass jacket. The adapter, the inner thread of the adapter cooperates with the Luer connector of the glass jacket to form a 6% Luer lock connector.

According to the current market survey, the biggest problem in the use of prefilled syringes with Luer lock joints is the connection firmness between the adapter and the glass syringe jacket. The adapter often loosens or even falls off during use. clinical accident.

Utility model content

The purpose of the utility model is to solve the problems of loosening and falling off of the syringe with a Luer lock joint during use, and to provide a prefilled syringe with a simple structure, safety and reliability that prevents falling off.

The technical scheme of the utility model is:

The anti-falling prefilled syringe includes a jacket, a push rod and a piston slidably arranged in the jacket, a Luer connector is provided on the top of the jacket, an adapter is provided on the outside of the Ruer connector, and an internal thread is provided on the inner wall of the adapter. The root of the Luer connector is provided with a card slot, the rear end of the card slot is connected to the top of the jacket, the front end of the card slot is connected to the rear end of the Luer connector, the diameter of the card slot is smaller than the diameter of the proximal end of the Luer connector, and the adapter The inner side wall of the rear end is provided with a protrusion that matches the card slot, and the protrusion and the card slot are in an interference fit. At the same time, the proximal end of the card slot is bonded to the adapter with a cured adhesive layer. The card slot or the proximal surface of the card slot is connected, and the other side of the cured adhesive layer is connected with the protrusion of the adapter.

The protrusion at the rear end of the adapter of the syringe and the card slot are fixed together through a cured adhesive layer. During use, when installing the needle of the Luer lock connector, the needle is rotated and installed on the adapter and tightened, so as to prevent the adapter from rotating or falling off due to excessive pressure of the liquid medicine during injection.

The cured adhesive layer is a UV cured adhesive layer, an electronic book cured adhesive layer or an LED cured adhesive layer.

The cured adhesive layer is located in the card slot or at the circumference of the connecting part between the proximal end of the card slot and the adapter.

The utility model has the advantages and positive effects that: due to the adoption of the above technical solution, the connection between the adapter and the card slot is more firm, and the safety of the whole anti-falling off prefilled syringe is improved.

Description of drawings

Fig. 1 is the structure schematic diagram of the anti-dropping prefilled syringe of the present invention

Fig. 2 is the sectional view of the anti-dropping prefilled syringe of the present utility model

Fig. 3 is an enlarged view of the anti-dropping prefilled syringe of the present invention without a needle

Fig. 4 is the enlarged view after the needle is installed in the anti-dropping prefilled syringe of the utility model

In the picture:

1. Needle 2. Adapter 3. Jacket 4. Push rod 5. Piston

6. Luer connector 7. Card slot 8. Cured adhesive layer 21. Protrusion 22. Internal thread

detailed description

As shown in Figure 1, the anti-falling prefilled syringe of the present invention includes an outer casing 3 and a push rod 4 and a piston 5 that are slidably arranged in the outer casing 3. The top of the outer casing 3 is provided with a Luer connector 6, and the outer casing of the Luer connector 6 is An adapter 2 is provided, and an internal thread 22 is provided on the inner wall of the adapter 2, and a card slot 7 is provided at the root of the Luer connector 6, the rear end of the card slot 7 is connected with the top of the jacket 3, and the front end of the card slot 7 is connected with the Luer The rear ends of the joints 6 are connected, and the diameter of the slot 7 is smaller than the diameter of the proximal end of the Luer connector 6. The inner wall of the rear end of the adapter 2 is provided with a protrusion 21 that matches the slot 7, and the gap between the protrusion 21 and the slot 7 is Interference fit, at the same time there is a cured adhesive layer 8 between the card slot 7 or the proximal end of the card slot 7 and the adapter 2, one side of the cured adhesive layer 8 is connected to the surface or the proximal end of the card slot 7, and the cured adhesive layer 8 The other side is connected with the protrusion 21 of the adapter 2 .

The protrusion at the rear end of the adapter of the syringe and the card slot are fixed together through a cured adhesive layer. During use, when installing the needle 1 of the Luer lock connector, rotate the needle 1 to the adapter 2 and tighten it, so as to prevent the adapter 2 from rotating or being caused by the excessive pressure of the drug solution during the injection of the drug solution. fall off.

Further, the cured adhesive layer 8 is a UV cured adhesive layer, an e-book cured adhesive layer or an LED cured adhesive layer.

Wherein, the cured adhesive layer should be located in the card slot or at the circumference of the connecting part between the proximal end of the card slot and the adapter. In this way, the cured layer 8 can effectively bond the card slot 7 or the proximal end of the card slot 7 to the adapter 2, preventing the adapter 2 from loosening or falling off.

The working process of this example: the protrusion 21 of the adapter 2 is fixedly connected with the card slot 7 through a cured adhesive layer, which eliminates the possible relative movement between the two, and avoids that when the needle 1 is screwed into the adapter 2, the 7 relative to each other, and cause the fixed connection between the adapter 2 and the card slot 7 to be destroyed, resulting in loosening. During the injection process, under the pressure of the injection liquid, especially the viscous liquid medicine that is difficult to inject, the adapter 2 and the needle 1 will break away from the fixing of the card slot 7 under high pressure, causing medical accidents or product failure.

An embodiment of the present utility model has been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the application scope of the utility model should still belong to the scope covered by the patent of the utility model.

Claims (4)

1. the pre-charge injector of slip-off preventing, the push rod including overcoat and being slideably positioned in overcoat and piston, overcoat top is provided with Female Luer, is arranged with adapter outside female Luer, the medial wall of adapter is provided with female thread, the root of described female Luer Portion is provided with draw-in groove, and the rear end of draw-in groove is connected with overcoat top, and the front end of draw-in groove is connected with female Luer rear end, draw-in groove straight Footpath is less than the diameter of female Luer near-end, and the medial wall of described adapter rear end is provided with the projection matching with draw-in groove, raised Interference fit and draw-in groove between, draw-in groove near-end and adapter have solidification glue-line bonding, the side of described solidification glue-line and card simultaneously Groove proximal end face is connected, and the opposite side of described solidification glue-line is connected with raised medial wall.

2. slip-off preventing according to claim 1 pre-charge injector it is characterised in that：Described solidification glue-line is UV solidification glue Layer, electronic beam curing glue-line or LED solidification glue-line.

3. slip-off preventing according to claim 2 pre-charge injector it is characterised in that：Described solidification glue-line be located at draw-in groove or At the circumference of draw-in groove near-end and adapter connecting portion.

4. slip-off preventing according to claim 3 pre-charge injector it is characterised in that：The width of described solidification glue-line is less than The raised depth of adapter.