CN209827770U - An infusion set with an anti-dropping self-locking structure - Google Patents

Abstract

The utility model discloses an infusion apparatus with an anti-drop self-locking structure, which comprises a bottle stopper puncture needle, wherein the bottle stopper puncture needle comprises a needle head and a needle handle, a convex needle head protection tube is arranged on the needle handle, and the needle head is arranged in the needle head protection tube; the lower end of the inner cavity of the needle handle is provided with a connecting sheet, the lower end surface of the connecting sheet is connected with an elastic device, and the elastic device is fixed on the needle handle; the upper end face of the connecting sheet is connected with a telescopic rod, one end of the telescopic rod faces the wall surface of the needle handle, the telescopic rod penetrates through the wall surface of the needle handle, and a button head higher than the outer surface of the needle handle is arranged on the telescopic rod; the upper end surface of the connecting sheet is provided with a linkage rod, the linkage rod extends into the needle head protecting tube, the linkage rod penetrates through the wall surface of the needle head protecting tube, and the linkage rod is provided with a convex barb on the outer side surface of the needle head protecting tube; the bottle stopper puncture needle inserted into the bottle stopper of the infusion bottle is ensured to be firmly fixed in the infusion bottle, and the bottle stopper puncture needle cannot fall off from the infusion bottle under the action of external force, so that the working strength of medical care personnel is reduced, and the medical cost of a patient is saved.

Description

An infusion set with an anti-dropping self-locking structure

technical field

The utility model relates to the technical field of medical instruments, in particular to an infusion set with a fall-off-preventing self-locking structure.

Background technique

The infusion set is a common medical consumable. After aseptic treatment, a channel between the vein and the liquid medicine is established for intravenous infusion. The infusion set is generally composed of an infusion needle, a needle cap, an infusion hose, a liquid medicine filter, a flow rate regulator, a drip pot, a cork puncture needle, an air filter, and the like. Among them, when the infusion set is used to infuse the patient, the connection between the cork puncture needle and the infusion bottle is realized by inserting the tapered head of the cork puncture needle into the rubber cork of the infusion bottle to form an interference fit to realize the connection between the two. During use, if the nurse inserts the cork puncture needle into the infusion bottle, it will be during infusion. Such as the following situations: ① Elderly patients are inconvenient to move, have certain cognitive impairments, and cannot cooperate well with nurses, which increases the probability that the puncture needle will fall out of the bottle stopper; Cooperating well with nurses will also cause the needle of the puncture needle to detach from the bottle stopper; ③The needle will also fall off when a normal person sits on the infusion set inadvertently; External force causes the infusion set to break away from the bottle stopper, and the puncture needle of the infusion set is contaminated by bacteria, making it unusable. At this time, the entire infusion set must be replaced, which increases the labor intensity of the nurses, not only increases the cost, but also brings great harm to the medical work. It is inconvenient, and some patients and their family members lack awareness of the rigor of medical care, and insert the dropped needle into the bottle stopper, causing the contamination of the liquid in the infusion bag. The liquid carries bacteria and enters the human body through the vein, causing harm to the patient. , and even life-threatening to the patient, the medical cost at this time is quite huge.

Utility model content

The purpose of this utility model is to provide an infusion device with an anti-falling self-locking structure, which can ensure that the cork puncture needle inserted into the cork of the infusion bottle is firmly fixed in the infusion bottle, even if the cork is under the action of external force The puncture needle will not fall off from the infusion bottle, which reduces the work intensity of medical staff and saves medical costs for patients.

In order to achieve the purpose of the above invention, the utility model adopts the following technical solutions: an infusion set with an anti-falling self-locking structure, including a bottle stopper puncture needle, the bottle stopper puncture needle includes a needle head and a needle handle, and the needle handle There is a protruding needle protection tube on the top, and the needle is installed in the needle protection tube; the lower end of the inner cavity of the needle handle is provided with a connecting piece, the connecting piece is ring-shaped, and the lower end of the connecting piece is connected with an elastic device, the The elastic device is fixed on the needle handle; the upper end of the connecting piece is connected with a telescopic rod, and one end of the telescopic rod is set towards the wall of the needle handle, and the telescopic rod passes through the wall of the needle handle, and the telescopic rod is provided with a high The button head on the outer surface of the needle handle; the upper end surface of the connecting piece is also provided with a linkage rod, the linkage rod extends into the needle protection tube, the linkage rod passes through the wall of the needle protection tube, and the linkage rod is in the needle protection tube. The outer side of the tube is provided with protruding barbs.

Preferably, the upper end of the barb is an arc surface, the lower end is a horizontal plane, and the protruding length of the barb is 2-3mm; the upper end of the barb is an arc surface so that the barb is protected towards the needle under the action of the linkage rod. The inside of the tube moves more smoothly to avoid interference, and the lower end of the barb is a horizontal plane, which ensures that the horizontal plane of the barb can be smoothly attached to the end surface of the bottle stopper of the infusion bag, which can increase the contact area between the barb and the bottle stopper. The force of the barb on the cork is tightened; and the protruding length of the barb is 2-3mm to ensure that the area of the barb's horizontal surface and the cork is large enough to further increase the tightness and stability of the buckle sex.

Preferably, the barb and the linkage rod have an integrated structure; the structure has high strength, can prevent cracking and breaking, can be used for a longer period of time, and is cheap and easy to manufacture.

As a preference, a central hole for the infusion set to pass through is opened in the middle of the connecting piece, the connecting piece is made of metal, and the thickness of the connecting piece is 1-2mm; the connecting piece needs to reciprocate up and down, and the connecting piece made of metal The service life is longer, and the increase in thickness is to ensure that the connecting piece will not break after being moved and stressed.

Preferably, the elastic device is a spring distributed along the inner cavity of the needle handle; the spring is cheap, stretches elastically in a natural state, and contracts elastically when stressed.

As preferably, the protruding length of the button head is greater than the protruding length of the barb; because the barb is driven to move synchronously when the button head is pressed, if the length of the button head is shorter than the protruding length of the barb, the button head will move towards the needle handle When retracting, the barb cannot be completely brought into the needle protection tube synchronously, resulting in a part of the barb still outside the needle protection tube, causing interference, so that the medical staff cannot easily pull out the needle from the infusion bag.

Preferably, a stopper is provided on the inner surface of the needle handle, and the stopper is located above the connecting piece; the function of the stopper is to limit the position of the connecting piece so that it is in an accurate working position.

As a preference, guide tubes are sleeved on the outer surfaces of the telescopic rod and the linkage rod, and the guide tube is integrated with the needle handle and the needle protection tube; the guide sleeve is integrally manufactured to guide the movement of the telescopic rod and the linkage rod High structural strength.

As a preference, the opening of the guide tube at the position of the linkage rod is larger than the cross-sectional area of the barb; avoiding the jamming phenomenon caused by interference with the outer surface of the needle protection tube when the barb on the linkage rod retracts, ensuring that the barb can smooth movement.

Compared with the prior art, an infusion set with an anti-dropping self-locking structure adopting the above technical solution has the following beneficial effects:

The barb can be buckled on the cork of the infusion bottle smoothly and firmly, and in the natural state, under the action of the elastic device, the barb is in the extended state, which can ensure that the needle will not fall off when inserted into the cork, even under the action of external force It is also difficult to fall out from the infusion bottle.

Description of drawings

Fig. 1 is a structural schematic diagram of an embodiment of an infusion set with an anti-falling-off self-locking structure of the present invention;

Fig. 2 is the partial enlarged view of place A in Fig. 1 of the present embodiment;

Fig. 3 is the partial enlarged view of place B in Fig. 1 of the present embodiment;

Fig. 4 is the schematic structural view of connecting sheet in the present embodiment;

Fig. 5 is a schematic structural diagram of the infusion set in this embodiment.

Reference signs: 1, needle head; 2, needle handle; 20, needle head protection tube; 3, connecting piece; 4, elastic device; 5, telescopic rod; 50, button head; 6, linkage rod; 7, barb; 8 , block; 9, guide tube.

Detailed ways

Below in conjunction with accompanying drawing, the utility model is further described.

An infusion set with an anti-falling self-locking structure as shown in Figures 1 to 5, includes a cork puncture needle, and the cork puncture needle includes a needle head 1 and a needle handle 2, and the needle handle 2 is provided with a protrusion Out of the needle protection tube 20, the needle 1 is installed in the needle protection tube 20; the lower end of the inner cavity of the needle handle 2 is provided with a connecting piece 3, the connecting piece 3 is ring-shaped, and the lower end surface of the connecting piece 3 is connected to the elastic device 4, the elastic device 4 is fixed on the needle handle 2; the upper end surface of the connecting piece 3 is connected with a telescopic rod 5, and one end of the telescopic rod 5 is arranged towards the wall surface of the needle handle 2, and the telescopic rod 5 passes through Pass through the wall surface of the needle handle 2, and the telescopic rod 5 is provided with a button head 50 higher than the outer surface of the needle handle 2; the upper end surface of the connecting piece 3 is also provided with a linkage rod 6, and the linkage rod 6 extends to the needle protection tube 20 , the linkage rod 6 passes through the wall of the needle protection tube 20 , and the linkage rod 6 is provided with a protruding barb 7 on the outer surface of the needle protection tube 20 .

As shown in Figure 1, the thumb and forefinger of the medical staff press the button head 50 on the needle handle 2, the button head 50 is forced to retract toward the inside of the needle handle 2, and the button head 50 drives the telescopic rod 5 to move synchronously. 3 is forced to move downward, which drives the elastic device 4 to elastically contract, and the linkage rod 6 on the upper end surface of the connecting piece 3 also moves synchronously, which drives the movement of the barb 7, and the barb 7 retracts into the needle protection tube 20 , until the barb 7 is completely located in the needle protection tube 20, the medical staff can insert the needle 1 into the stopper of the infusion bottle at this time, and after the needle 1 is completely placed in the infusion bottle, the position of the needle 1 and the extension of the needle 1 are adjusted. After entering the length, release the button head 50, and the button head 50 will stretch elastically under the action of the elastic force of the elastic device 4 itself. At this time, the barb 7 will automatically stretch out until it exceeds the outer surface of the needle protection tube 20 and the bottle stopper. The end face of the infusion bottle is bonded, so that the barb 7 is fastened on the bottle stopper, even if the infusion set is subjected to external force, the needle 1 will not be pulled out from the infusion bottle, which ensures the normal infusion of the infusion set.

As shown in Figure 2, the upper end of the barb 7 is a circular arc surface, the lower end is a horizontal plane, and the protruding length of the barb 7 is 2-3mm; It is smoother when moving toward the inside of the needle protection tube 20 under the action of the needle protection tube 20, avoiding interference, and the lower end of the barb 7 is a horizontal plane, which ensures that the horizontal plane of the barb 7 can fit smoothly on the end surface of the bottle stopper of the infusion bag, which can increase The contact area between the barb 7 and the cork makes the force of the barb 7 fastened on the cork more tightly; and the protruding length of the barb 7 is 2-3mm, which is to ensure that the horizontal plane of the barb 7 is fastened with the cork The area is large enough to further increase the fastening tightness and stability.

The barb 7 and the linkage rod 6 have an integrated structure; the structure has high strength, can prevent cracking and breaking, and can be used for a longer period of time, and the price is convenient to manufacture.

As shown in Figure 4, a central hole for the infusion set to pass is opened in the middle of the connecting piece 3, the connecting piece 3 is made of metal, and the thickness of the connecting piece 3 is 1-2mm; the connecting piece 3 needs to reciprocate up and down, and the metal The connection piece 3 made of material has a longer service life, and the increase in thickness is to ensure that the connection piece 3 will not break after being moved and stressed.

The elastic device 4 is a spring distributed along the circumference of the inner cavity of the needle handle 2; the spring is cheap, stretches elastically in a natural state, and contracts elastically after being stressed.

The protruding length of the button head 50 is greater than the protruding length of the barb 7; because the barb 7 is moved synchronously when the button head 50 is pressed, if the length of the button head 50 is as short as the protruding length of the barb 7, then the button head 50 faces When the needle handle 2 is indented, the barb 7 cannot be completely brought into the needle protection tube 20 synchronously, causing a part of the barb 7 to remain outside the needle protection tube 20, causing interference. Pull needle 1 out of the infusion bag.

A stopper 8 is arranged on the inner surface of the needle handle 2, and the stopper 8 is located above the connecting piece 3; the function of the stopper 8 is to limit the position of the connecting piece 3 so that it is in an accurate working position.

The outer surfaces of the telescopic rod 5 and the linkage rod 6 are all sleeved with a guide tube 9, and the guide tube 9 is integrated with the needle handle 2 and the needle protection tube 20; the guide sleeve is to guide the movement of the telescopic rod 5 and the linkage rod 6 , The integral manufacturing structure has high strength.

The opening of the guide tube 9 at the position of the linkage rod 6 is larger than the cross-sectional area of the barb 7; avoid the jamming phenomenon caused by the interference of the barb 7 on the linkage rod 6 with the outer surface of the needle protection tube 20 when retracting, and ensure the barb 7 to be able to move smoothly.

The above description makes the preferred embodiment of the present utility model, for those of ordinary skill in the art, under the premise of not departing from the principle of the present utility model, some modifications and improvements can also be made, and these should also be regarded as protection of the present utility model scope.

Claims (7)

1. An infusion set with an anti-falling self-locking structure, including a cork puncture needle, the cork puncture needle includes a needle head (1) and a needle handle (2), and the needle handle (2) is provided with a convex Out of the needle protection tube (20), the needle (1) is installed in the needle protection tube (20); it is characterized in that: the lower end of the inner cavity of the needle handle (2) is provided with a connecting piece (3), the connection The piece (3) is ring-shaped, and the lower end surface of the connecting piece (3) is connected to the elastic device (4), and the elastic device (4) is fixed on the needle handle (2); the upper end surface of the connecting piece (3) is connected to There is a telescopic rod (5), one end of the telescopic rod (5) is set towards the wall of the needle handle (2), the telescopic rod (5) passes through the wall of the needle handle (2), and the telescopic rod (5) is set There is a button head (50) higher than the outer surface of the needle handle (2); the upper end surface of the connecting piece (3) is also provided with a linkage rod (6), and the linkage rod (6) extends to the needle protection tube (20 ), the linkage rod (6) passes through the wall of the needle protection tube (20), and the linkage rod (6) is provided with a protruding barb (7) on the outer surface of the needle protection tube (20); The protruding length of the button head (50) is greater than the protruding length of the barb (7); The elastic device (4) is a spring distributed along the inner cavity circumference of the needle handle (2). 2. An infusion set with an anti-falling self-locking structure according to claim 1, characterized in that: the upper end of the barb (7) is a circular arc surface, the lower end is a horizontal plane, and the barb (7) The length of the protrusion is 2-3mm. 3. An infusion set with a fall-off-preventing self-locking structure according to claim 1, characterized in that: the barb (7) is integrated with the linkage rod (6). 4. An infusion set with an anti-falling self-locking structure according to claim 1, characterized in that: the middle part of the connecting piece (3) is provided with a central hole for the infusion tube to pass through, and the connecting piece (3) is made of metal, and the thickness of the connecting piece (3) is 1-2mm. 5. An infusion set with an anti-dropping self-locking structure according to claim 1, characterized in that: a stopper (8) is provided on the inner surface of the needle handle (2), and the stopper (8) ) above the connecting piece (3). 6. An infusion set with an anti-dropping self-locking structure according to claim 1, characterized in that guide tubes ( 9), the guide tube (9) is integrated with the needle handle (2) and the needle protection tube (20). 7. An infusion set with an anti-falling self-locking structure according to claim 6, characterized in that: the opening of the guide tube (9) at the position of the linkage rod (6) is larger than that of the barb (7) cross-sectional area.