CN212522704U

CN212522704U - Infusion apparatus connector

Info

Publication number: CN212522704U
Application number: CN202020486088.3U
Authority: CN
Inventors: 康雪; 郭梅; 张淑豪
Original assignee: Chinese PLA General Hospital
Current assignee: Chinese PLA General Hospital
Priority date: 2020-04-07
Filing date: 2020-04-07
Publication date: 2021-02-12
Anticipated expiration: 2030-04-07

Abstract

The application discloses transfusion system connector, it includes: an inner joint and an outer ferrule; the nipple comprises an inner tube and an outer tube; the outer pipe is arranged around the inner pipe, and a circle of convex wall which protrudes outwards is formed on the periphery of the outer pipe; the outer ferrule is sleeved on the convex wall; the inner circumferential surface of the outer ring is in close contact with the outer circumferential surface of the convex wall and has a preset friction force; when the screwing force applied by a user through the outer ring is smaller than the friction force, the outer ring and the outer pipe rotate together; when the screwing force applied by the user through the outer ring is larger than the friction force, the outer ring and the outer pipe slide relatively. The relative sliding between the outer ring and the outer tube gives feedback to the operator that the connector of the infusion apparatus is screwed in place, and avoids the situation that the connector of the infusion apparatus is screwed too much.

Description

Infusion apparatus connector

Technical Field

The application relates to an infusion apparatus, in particular to a connector of an infusion apparatus.

Background

The infusion apparatus is a common medical consumable, and a channel between a vein and liquid medicine is established through aseptic treatment for intravenous infusion. The head ends of the infusion apparatus are generally two types; most commonly, a venipuncture needle, also known as a scalp needle, is directly punctured into a vein; another is a connector as shown in fig. 1a-1c, which is connected to the port, PICC, etc. by a positive pressure connector without repeated punctures. The infusion apparatus joint in the prior art comprises an inner tube 10 and an outer tube 20, wherein the inner tube 10 is inserted into a positive pressure joint to be communicated with the positive pressure joint so as to form a pipeline for conveying liquid medicine; the inner periphery of the outer tube is provided with internal threads which are combined with the external threads of the positive pressure joint, so that the positive pressure joint and the infusion apparatus connector are tightly connected together.

In clinical work, a nurse is difficult to know the specific position where the connection is tight enough, and in order to ensure firm connection, the infusion set connector and the positive pressure connector can only be connected together as tightly as possible until the connection is not screwed; this can cause difficulty in removing the infusion set. For example, when the tube is sealed after the infusion is completed and the infusion set needs to be removed, it is difficult to remove the infusion set connector.

SUMMERY OF THE UTILITY MODEL

In view of the above problems, the present application aims to provide an infusion set connector capable of reminding that screwing is in place.

The application discloses transfusion system connector, it includes: an inner joint and an outer ferrule;

the nipple comprises an inner tube and an outer tube; the outer pipe is arranged around the inner pipe, and a circle of convex wall which protrudes outwards is formed on the periphery of the outer pipe;

the outer ferrule is sleeved on the convex wall; the inner circumferential surface of the outer ring is in close contact with the outer circumferential surface of the convex wall and has a preset friction force; when the screwing force applied by a user through the outer ring is smaller than the friction force, the outer ring and the outer pipe rotate together; when the screwing force applied by the user through the outer ring is larger than the friction force, the outer ring and the outer pipe slide relatively.

Preferably, the convex wall is formed at a middle portion of the outer tube;

two sides of the outer ring are downwards formed with convex edges, and the convex wall is accommodated between the two convex edges.

Preferably, the outer side of the outer ring is formed with a first handle.

Preferably, the outer circumferential surface of the convex wall and the inner circumferential surface of the outer race are formed as rough surfaces.

Preferably, a second handle is formed at a rear end of the outer tube.

The outer ferrule is arranged outside the infusion apparatus connector, the maximum screwing force of the infusion apparatus connector is limited by the maximum friction force between the outer ferrule and the convex wall, when the screwing force is larger than the screwing force, the infusion apparatus connector cannot be screwed continuously, relative sliding occurs between the outer ferrule and the outer tube, the screwing is fed back to an operator to be screwed in place, and the situation that the infusion apparatus connector is screwed excessively is avoided.

Drawings

FIG. 1a is a schematic front view of a connector of an infusion set in the prior art;

FIG. 1b is a schematic cross-sectional view of a connector of an infusion set in the prior art;

FIG. 1c is a schematic cross-sectional view of a connector of an infusion set in the prior art;

fig. 2 is a schematic front view of the infusion set connector of the present application;

FIG. 3 is a schematic sectional view of the connector of the infusion set of the present application;

FIG. 4 is a schematic front view of the inner connector of the infusion set connector of the present application;

FIG. 5 is a schematic cross-sectional view of the inner joint of the infusion set connector of the present application;

FIG. 6 is a schematic front view of an outer ferrule of the infusion set connector according to the present application;

FIG. 7 is a schematic side view of the outer ferrule of the infusion set connector of the present application;

FIG. 8 is a cross-sectional view of the outer race of FIG. 7;

fig. 9 is a cross-sectional structure diagram of the outer race of fig. 7.

Detailed Description

The infusion set connector of the present application will be described in detail with reference to the accompanying drawings.

The application discloses transfusion system connector, it includes: an inner joint and an outer ferrule 30.

The nipple comprises an inner tube 10 and an outer tube 20; an outer tube 20 is disposed around the inner tube 10, and the outer circumference of the outer tube 20 is formed with a ring of outwardly convex walls 21.

The outer ferrule 30 is sleeved on the convex wall 21; the inner peripheral surface 32 of the outer race 30 is in close contact with the outer peripheral surface of the convex wall 21 and has a predetermined frictional force; when the screwing force applied by the user through the outer ring 30 is smaller than the friction force, the outer ring 30 and the outer tube 20 rotate together, and the whole infusion set connector is screwed in; when the tightening force applied by the user through the outer ring 30 is greater than the friction force, the outer ring 30 slides relative to the outer tube 20, i.e., slipping occurs.

A convex wall 21 is formed at the middle of the outer tube 20 as shown in fig. 4.

Both sides of the outer race 30 are formed downward with a ledge between which the ledge 21 is received.

The outer side of the outer collar 30 is formed with a first handle 31 to assist in screwing or screwing the infusion set connector.

The outer peripheral surface of the convex wall 21 and the inner peripheral surface of the outer race are formed as rough surfaces.

A second handle 22 is formed at the rear end of the outer tube 20, and the second handle 22 is used for screwing out the infusion set connector.

When the infusion apparatus connector and the positive pressure connector are screwed, the resistance in the screwing process is small, and the outer tube and the outer ferrule rotate integrally; when the outer pipe reaches the end of the positive pressure joint thread, if the outer pipe is continuously screwed, the outer pipe cannot continuously advance a lot, so that great resistance is generated, if an operator continuously increases the screwing force to try to further screw, once a preset pressure is exceeded, the outer ring and the outer pipe slide relatively, the screwing force hardly acts on the outer pipe, and the operator knows that the outer pipe is screwed in place by sensing the relative sliding. When the connector of the infusion apparatus needs to be disassembled, the connector of the infusion apparatus is screwed down by rotating the second handle at the rear part of the outer tube in the opposite direction.

Claims

1. The utility model provides an infusion set connector which characterized in that includes: an inner joint and an outer ferrule;

2. The infusion set connector according to claim 1, wherein:

the convex wall is formed in the middle of the outer pipe;

3. The infusion set connector according to claim 1, wherein:

a first handle is formed on the outer side of the outer ring.

4. The infusion set connector according to claim 1, wherein:

the outer peripheral surface of the convex wall and the inner peripheral surface of the outer race are formed into rough surfaces.

5. The infusion set connector according to claim 1, wherein:

a second handle is formed at the rear end of the outer tube.