CN204181950U - A kind of Needleless seal formula infusion connector - Google Patents

Abstract

The utility model relates to the technical field of medical instruments, in particular to a needle-free sealed transfusion joint. The needle-free airtight infusion joint includes an upper shell, a lower shell, a main cavity formed by connecting the upper shell and the lower shell, and an infusion valve arranged in the main cavity. The upper end of the upper shell is provided with There is a connecting head, the lower end of the lower shell is provided with a Luer outer cone, the infusion valve is made of elastic material, the upper circular end surface of which protrudes from the upper shell and is fixed on the top surface of the connecting head. The lower circular end surface of the infusion valve is arranged between the upper shell and the lower shell, and is in close contact with the inner cavity wall of the upper shell and the outer wall of the lower shell, and the infusion valve is provided with a Luer connector with the infusion set Matching self-sealing infusion channel. The needle-free closed infusion connector can have good airtightness no matter in the infusion state connected with the infusion set or in the closed state not connected with the infusion set.

Description

A needle-free sealed infusion connector

technical field

The utility model relates to the technical field of medical instruments, in particular to a needle-free sealed transfusion joint.

Background technique

The needle-free closed infusion connector is mainly used for sealing the end of CVC (central venous catheter), PICC (peripherally inserted central venous catheter), and indwelling needle catheter. When the infusion set is connected with the needle-free closed infusion connector, a closed Infusion channel; after the infusion device is pulled out, the needle-free closed infusion connector is in a sealed state to prevent gas and external pollution sources from entering the infusion catheter.

With the clinical promotion and application of CVC, PICC and indwelling needle catheters, the clinical utilization rate of needle-free closed infusion connectors has also increased, and the airtightness of needle-free closed infusion connectors is particularly important during use. Poor resistance can easily cause gas or external pollution sources to enter the human body, increasing the probability of air embolism or bloodstream infection in the human body. The use of the existing needle-free airtight infusion connector reduces the incidence of needle-stick injuries, but its airtightness is still insufficient, and air embolism and bloodstream infection are prone to occur during use.

Therefore, to address the above shortcomings, it is necessary to provide a needle-free airtight infusion connector with good airtightness and simple structure.

Utility model content

(1) Technical problems to be solved

The technical problem to be solved by the utility model is to solve the problem of insufficient airtightness of the existing needle-free airtight infusion joint.

(2) Technical solutions

In order to solve the above technical problems, the utility model provides a needle-free airtight infusion joint, which includes an upper shell, a lower shell, a main cavity formed by connecting the upper shell and the lower shell, and a The infusion valve in the body, the upper end of the upper shell is provided with a connector, the lower end of the lower shell is provided with a Luer outer cone, the infusion valve is made of elastic material, and its upper circular end surface protrudes from the upper shell Body and fixed on the top surface of the connector, the lower circular end surface of the infusion valve is arranged between the upper shell and the lower shell, and is close to the inner cavity wall of the upper shell and the outer wall of the lower shell, so The above-mentioned infusion valve is provided with a self-sealing infusion channel matching with the Luer connector of the infusion set.

Preferably, the infusion valve is made of elastic rubber material.

Preferably, the self-sealing infusion channel has a wide top and a narrow bottom, with a taper of 3.44°, and in a natural state, the self-sealing infusion channel is in the shape of a closed slit.

Preferably, the upper circular end surface is provided with a tapered groove.

Preferably, the top end surface is an arc-shaped concave surface.

Preferably, the lower circular end surface is a conical surface, and the conical surface extends outward from the axis, with a taper of 135°.

Preferably, arc grooves are provided on the tapered surface.

(3) Beneficial effects

The above-mentioned technical solution of the utility model has the following advantages: the needle-free airtight infusion connector includes an upper shell, a lower shell, a main cavity composed of the upper shell and the lower shell, and an infusion fluid set in the main cavity. The upper end of the upper housing is provided with a connector, the lower end of the lower housing is provided with a Luer outer cone, and the infusion valve is made of elastic material, the upper circular end of which protrudes from the upper housing and is fixed on the top of the connector The lower circular end surface of the infusion valve is arranged between the upper casing and the lower casing, and is in close contact with the inner cavity wall of the upper casing and the outer wall of the lower casing. The infusion valve is provided with an infusion device The self-sealing infusion channel matched with the Luer connector. The needle-free closed infusion connector can have good airtightness no matter in the infusion state connected with the infusion set or in the closed state not connected with the infusion set.

Description of drawings

Fig. 1 is the schematic sectional view of the utility model needle-free closed infusion connector;

Fig. 2 is a schematic cross-sectional view of the connection between the needle-free closed infusion connector of the present invention and the infusion set;

Fig. 3 is a schematic cross-sectional view of the closed state of the self-sealing infusion channel of the infusion valve of the present invention;

Fig. 4 is a schematic cross-sectional view of the open state of the self-closing infusion channel of the infusion valve of the present invention;

Fig. 5 is a schematic diagram of the upper casing of the utility model;

Fig. 6 is a schematic diagram of the appearance structure of the needle-free sealed infusion connector of the present invention.

In the figure: 1: upper shell; 11: connector; 111: top surface; 2: lower shell; 21: Luer outer cone; 3: main cavity; 4: infusion valve; 41: upper circular end face; 42 : lower circular end face; ; 421: conical surface; 422: arc groove; 43: self-sealing infusion channel; 44: conical groove; 5: Luer connector.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the utility model more clear, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the utility model. Obviously, the described The embodiments are some embodiments of the present utility model, but not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of the present utility model.

In the description of the present utility model, unless otherwise specified, "plurality" means two or more; unless otherwise specified, "notch-shaped" means a shape other than a flat section. The orientation or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail" etc. is Based on the orientation or positional relationship shown in the drawings, it is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot It should be understood as a limitation of the present utility model.

As shown in Fig. 1, Fig. 2 and Fig. 6, the needle-free airtight infusion connector provided by the embodiment of the present invention includes an upper shell 1 and a lower shell 2, the upper end of the upper shell is provided with a connector, and the lower end of the lower shell is There is a Luer outer cone, the upper shell 1 and the lower shell 2 are both hollow structures, and they are connected to form a main cavity 3, and an infusion valve 4 is arranged in the main cavity 3, and the upper circular end surface of the infusion valve 4 41 protrudes from the upper casing 1 and is bonded to the top end surface 111 of the connector 11. The lower circular end surface 42 of the infusion valve 4 is provided with a groove, and the lower casing 2 extends into the groove of the lower circular end surface 42. The shaped end face 42 is between the upper casing 1 and the lower casing 2, and is close to the inner cavity wall of the upper casing 1 and the outer wall of the lower casing 2. The infusion valve 4 is also provided with a self-sealing valve that runs through the entire infusion valve 4. Infusion channel 43, and in order to make the airtightness better when the infusion set is connected with the needle-free airtight infusion joint, the infusion valve 4 is made of elastic rubber material, preferably, as shown in Figure 4, the self-sealing infusion channel 43 is set as an upper Wide and narrow at the bottom, the taper α formed is 3.44°, and its taper fits with the taper of the Luer connector 5 of the infusion set. When the Luer connector 5 is inserted, the self-sealing infusion channel 43 is completely fitted with the Luer connector 5, The mutual force between the self-sealing infusion channel 43 and the Luer connector 5 is more uniform, and the airtightness is the best. When the infusion set is pulled out, the self-sealing infusion channel 43 is automatically closed under the extrusion force of the elastic rubber material, and the closed state is in the shape of a gap, preventing the entry of gas or other pollution sources, and the self-sealing infusion channel 43 is in a natural state For normally closed channel.

In order to further increase the airtightness of the needle-free airtight infusion connector, preferably, as shown in Figure 5, the top end surface 111 of the connector 11 is set as an arc-shaped concave surface, as shown in Figure 6, the upper circular end surface of the infusion valve 4 41 protrudes from the upper casing 1 and is bonded to the top end surface 111 of the connector 11, and the two sides of the infusion valve 4 (the two sides applying the closing force to the self-closing channel) are higher than the other two sides of the infusion valve 4 by fitting the top end surface 111 State, and the deformation of the higher sides will be more severe, and the extrusion force on the self-sealing infusion channel 43 will be greater, so that the airtightness of the needle-free airtight infusion joint is better.

For the Luer connector 5 of the infusion set to be inserted into the infusion valve 4 more easily, and the upper circular end surface 41 of the infusion valve 4 is more easily deformed when it is bonded on the top end surface 111, preferably, as shown in Fig. 1, Fig. 2 and Fig. 6 As shown, a tapered groove 44 is provided on the upper circular end surface 41, and the self-sealing infusion channel 43 is arranged in the tapered groove 44 and runs through the entire infusion valve 4. When the infusion valve 4 is bonded to the top surface 111, the upper circle The shaped end surface 41 is V-shaped.

In order to facilitate the connection of the needle-free airtight infusion connector with the infusion set and the infusion catheter more conveniently and firmly, preferably, as shown in Figure 1 and Figure 2, on the connector 11 of the upper housing 1, there is a device for connecting the infusion set. The external thread of the lower housing 2 is provided with an internal thread connected with the infusion catheter.

The Luer connector 5 of the infusion set passes through the self-sealing infusion channel 43, and the medicinal liquid passes through the infusion catheter connected with the Luer outer cone 21 of the needle-free airtight infusion connector. At this time, the main cavity of the needle-free airtight infusion connector is There are liquid medicines in the body 3, and these liquid medicines will exert force on the infusion valve 4, which affects the airtightness of the infusion valve 4 to a certain extent. In order to reduce the impact on the airtightness of the infusion valve 4, preferably, as shown in Figure 1 and 3, the lower circular end surface 42 of the infusion valve 4 is provided with a conical surface 421 at the end that is in contact with the liquid medicine. The apex of the conical surface 421 is downward, and the conical surface 421 extends obliquely upward from the apex. The taper β is 135°. When there is liquid medicine in the main cavity 3, the liquid medicine will submerge the part near the apex of the conical surface 421, and give the self-sealing infusion channel 43 arranged on the infusion valve 4 a force towards the axis, so that the airtight performance is better . More preferably, an arcuate groove 422 is provided on the conical surface 421, and it is advisable that the maximum diameter of the arcuate groove 422 be set close to the apex of the conical surface 421, so as to obtain more component force towards the axis, Increase the airtightness of the infusion valve 4.

When in use, the Luer connector 5 of the infusion set is inserted into the infusion valve 4, and the self-sealing infusion channel 43 is completely attached to the Luer connector 5. At this time, the infusion set, the needle-free closed infusion connector and the infusion catheter form a closed infusion channel ; When replacing the infusion set, pull out the Luer connector 5 of the infusion set, and the self-sealing infusion channel 43 will be automatically closed to form a closed space to prevent gas or other pollution sources from entering.

To sum up, the top end surface of the connection head of the upper housing of the needle-free closed infusion joint of the utility model is an arc-shaped concave surface, and the upper circular end surface of the infusion valve is bonded to the top surface, so that the infusion device is more easily connected with the needle-free The closed infusion joint is connected with better airtightness. The self-sealing infusion channel of the infusion valve is provided with a taper that fits the Luer joint, and the lower circular end surface is provided with a tapered surface, so that the needle-free closed infusion joint can be used no matter in the Good airtightness can be achieved in the infusion state connected with the infusion set, or in the closed state not connected with the infusion set.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present utility model, and are not intended to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit of the technical solutions of the various embodiments of the present invention. and range.

Claims (7)

1. A needle-free airtight infusion connector, characterized in that: it comprises an upper housing (1), a lower housing (2), and a main cavity formed by connecting the upper housing (1) and the lower housing (2) (3) and the infusion valve (4) arranged in the main cavity (3), the upper end of the upper housing (1) is provided with a connector (11), the lower end of the lower housing (2) There is a Luer outer cone (21), the infusion valve (4) is made of elastic material, and its upper circular end surface (41) protrudes from the upper casing (1) and is fixed on the top surface of the connector (11) (111), the lower circular end surface (42) of the infusion valve (4) is arranged between the upper casing (1) and the lower casing (2), and is close to the inner cavity of the upper casing (1) wall and the outer wall of the lower casing (2), the infusion valve (4) is provided with a self-sealing infusion channel (43) matching the Luer connector of the infusion set. 2. The needle-free sealed infusion connector according to claim 1, characterized in that: the infusion valve (4) is made of elastic rubber material. 3. The needle-free airtight infusion connector according to claim 1, characterized in that: the self-sealing infusion channel (43) is a structure with a wide top and a narrow bottom, and its taper is 3.44°, and the self-sealing infusion channel (43) is in a natural state. The closed infusion channel (43) is in the shape of a closed slit. 4. The needle-free sealed infusion connector according to claim 1, characterized in that: the upper circular end surface (41) is provided with a downward tapered groove (44). 5. The needle-free sealed infusion connector according to claim 1, characterized in that: the top end surface (111) is an arc-shaped concave surface. 6. The needle-free sealed infusion connector according to claim 1, characterized in that: the lower circular end surface (42) is provided with a conical surface (421), and the conical surface (421) extends outward from the axis , with a taper of 135°. 7. The needle-free sealed infusion connector according to claim 6, characterized in that: the conical surface (421) is provided with an arcuate groove (422).