CN104667381A - Anti-drop infusion apparatus needle - Google Patents

Abstract

An anti-falling needle for an infusion set, comprising a plastic needle with a needle point at the front end and a baffle in the middle. The front part between the needle point and the baffle is in the shape of a cylindrical tube. Any one of the wings is a triangular flat plate, the central axis of the plastic needle is located in the plane where the wings are located, and the angle between the rear side of any one of the wings and the central axis of the plastic needle is greater than the front side of the wing and the center axis of the plastic needle. The included angle of the central axis of the plastic needle. The front part of the plastic needle passes through the bottle stopper of the infusion set under the guidance of the needle point. After the fins are squeezed through the bottle stopper, the stopper is an elastic body that re-closes the gap formed when the fins pass through. The angle between them makes it difficult for the plastic needle to back off. In the present invention, fins are arranged on the front of the plastic needle. After the fins are squeezed through the cork, the cork is an elastic body, and the gap formed when the fins pass through is reclosed. The angle makes it difficult for the plastic needle to retreat, effectively preventing it from falling off.

Description

An anti-falling type infusion set needle

Technical field:

The invention relates to daily necessities for human beings, in particular to a medical device, in particular to an infusion set, in particular to an anti-falling off type infusion set needle.

Background technique:

In the prior art, the cork puncture needle used at the front end of the infusion set is made of plastic material, which is relatively smooth. However, if the patient changes position during the operation and pulls the infusion pipeline, the cork puncture needle is easy to fall off, causing pollution, and the infusion needs to be replaced.

Invention content:

The object of the present invention is to provide a fall-off-proof infusion set needle, which solves the technical problem in the prior art that the bottle stopper puncture needle used at the front end of the infusion set is easy to fall off.

The anti-falling type infusion set needle of the present invention comprises a plastic needle, the axis of the plastic needle is provided with a through hole, the front end of the plastic needle is provided with a needle point, and the middle part of the plastic needle is provided with a baffle, wherein, The front part of the plastic needle is located between the needle point and the baffle, and the front part of the plastic needle is in the shape of a cylindrical tube. There are three or four fins distributed along the circumferential direction on the front outer wall of the plastic needle, and any one of the fins is Triangular plate, the central axis of the plastic needle is located in the plane where the fins are located, and the angle between the rear side of any fin and the central axis of the plastic needle is greater than the angle between the front side of the fin and the central axis of the plastic needle.

Further, grooves parallel to the central axis are distributed on the front outer wall of the plastic needle along the circumference, the number of the grooves is the same as the number of the fins, and the depth of the grooves is equal to or greater than the width of the fins. The front ends of a fin are respectively arranged in the front end of a groove and are hinged with the plastic needle, and a spring is arranged between the rear end of the fin and the rear end of the groove, and the spring pushes the rear end of the fin toward the The outside of the plastic needle is offset.

Further, the outer corners of the fins transition in a circular arc.

The working principle of the present invention is: the front part of the plastic needle passes through the bottle stopper of the infusion set under the guidance of the needle point. After the fins squeeze through the bottle stopper, the bottle stopper is an elastic body, and the gap formed when the fins pass through is closed again, and the fins The angle between the rear end of the bottle stopper and the end face of the bottle stopper makes it difficult for the plastic needle to retreat.

Compared with the prior art, the present invention has positive and obvious effects. In the present invention, fins are arranged on the front of the plastic needle. After the fins are squeezed through the cork, the cork is an elastic body, and the gap formed when the fins pass is reclosed. The angle makes it difficult for the plastic needle to retreat, effectively preventing it from falling off.

Description of drawings:

Fig. 1 is a schematic structural view of a needle of an anti-falling infusion set according to the present invention.

Detailed ways:

Example 1:

As shown in Figure 1, a kind of anti-falling type infusion set needle of the present invention comprises a plastic needle, and the axial center of described plastic needle is provided with through hole, and the front end of plastic needle 1 is provided with needle point 2, and plastic needle 1 A baffle 3 is provided in the middle of the plastic needle 1, wherein the front of the plastic needle 1 is located between the needle point 2 and the baffle 3, the front of the plastic needle 1 is in the shape of a cylindrical tube, and the outer wall of the front of the plastic needle 1 is distributed along the circumferential direction. Or four fins 4, any one of the fins 4 is a triangular flat plate, the central axis of the plastic needle 1 is located in the plane of the fin 4, and the rear side of any one of the fins 4 is in the same plane as the central axis of the plastic needle 1. The included angles are greater than the included angles between the front side of the wing 4 and the central axis of the plastic needle 1 .

Further, the front outer wall of the plastic needle 1 is distributed with grooves parallel to its central axis along the circumference, the number of the grooves is the same as the number of the fins 4, and the depth of the grooves is equal to or greater than that of the fins 4. Width, the front end of any wing 4 is all respectively arranged in the front end of a groove and hinged with the plastic needle 1, a spring is arranged between the rear end of the wing 4 and the rear end of the groove, and the spring will The rear end of the wing 4 is biased toward the outside of the plastic needle 1 .

Further, the outer corners of the fins 4 transition in a circular arc.

The working principle of this embodiment is: the front part of the plastic needle 1 passes through the bottle stopper of the infusion set under the guidance of the needle point 2, after the fin 4 is squeezed through the bottle stopper, the bottle stopper is an elastic body, and the gap formed when the fin 4 passes through Re-sealing, the angle between the rear end of the flap 4 and the end face of the bottle stopper makes it difficult for the plastic needle 1 to retreat.

Claims (3)

1. an Anti-falling syringe needle for transfusion device, comprise a plastic spike, the axle center place of described plastic spike is provided with through hole, the front end of plastic spike is provided with needle point, the middle part of plastic spike is provided with baffle plate, it is characterized in that: the front portion of plastic spike is between needle point and baffle plate, the front portion of plastic spike is cylindrical tube, the anterior outer wall of plastic spike is circumferentially distributed with three or four fins, fin described in any one flat board all triangular in shape, the central axis of plastic spike is positioned at fin institute in the planes, the back side edge of any one fin and the angle of plastic spike central axis are all greater than the angle of this fin front side edge and plastic spike central axis.

2. a kind of Anti-falling syringe needle for transfusion device as claimed in claim 1, it is characterized in that: the anterior outer wall of plastic spike is circumferentially distributed with the groove with its centerline axis parallel, the number of described groove is identical with the number of fin, the degree of depth of groove is equal to, or greater than the width of fin, hinged with plastic spike in the front end that the front end of any one fin is arranged on a groove all separately, be provided with a spring between the rear end of fin and the rear end of groove, the outside of the rear end of fin to plastic spike is biased by described spring.

3. a kind of Anti-falling syringe needle for transfusion device as claimed in claim 1, is characterized in that: the exterior angle of fin is arc transition.