CN113018592A

CN113018592A - Syringe with a needle

Info

Publication number: CN113018592A
Application number: CN202110292348.2A
Authority: CN
Inventors: 刘艳艳; 孙颖川; 刘其伟
Original assignee: Xuchang University
Current assignee: Xuchang University
Priority date: 2021-03-18
Filing date: 2021-03-18
Publication date: 2021-06-25

Abstract

The application provides a syringe, including syringe barrel and with syringe barrel complex plunger, the plunger includes the plunger rod and with the inner chamber complex plunger head of syringe barrel, the plunger head includes the stock solution chamber and locates the stock solution intracavity and can follow stock solution chamber axial reciprocating motion's piston head, the hole site of intercommunication stock solution chamber is seted up to the tip that the piston head was kept away from to the plunger head, the one end and the piston head of plunger rod are connected, under the plunger rod promotes, the plunger head removes and the piston head along stock solution chamber axial motion towards the injection end of syringe barrel, thereby make the liquid of stock solution intracavity discharge from the injection end of syringe barrel. The utility model provides a plunger head stores the medicine through the stock solution chamber, during the use, need not to extract the liquid medicine from the external world, only needs to fill in the plunger barrel with the plunger head in, then promote the plunger rod can, under the promotion of plunger rod, the medicine in the stock solution intracavity is discharged and is discharged from the injection end of syringe barrel from the stock solution chamber, and the use is simple swift and can reduce medicine pollution probability.

Description

Syringe with a needle

Technical Field

The invention relates to the technical field of medical equipment, in particular to an injector.

Background

Syringes are common medical devices commonly used to inject liquid medications into patients. A typical syringe generally includes a barrel, a needle, and a plunger shaft. When the existing syringe is used, the liquid medicine is generally required to be extracted from a medicine bottle and then injected, the operation process is complex, and the liquid medicine is easily polluted.

Therefore, a technical scheme which is simple and quick in use process and can reduce the probability of drug contamination needs to be provided.

Disclosure of Invention

The present invention proposes a syringe with the aim of simplifying the operating process and reducing the probability of contamination of the drug.

The technical scheme adopted by the invention is as follows:

the utility model provides a syringe, including syringe barrel and with syringe barrel complex plunger, the plunger includes the plunger rod and with syringe barrel's inner chamber complex plunger head, the plunger head includes the stock solution chamber and locates the stock solution intracavity and can follow the piston head of stock solution chamber axial reciprocating motion, the hole site of intercommunication stock solution chamber is seted up to the tip that the plunger head kept away from the piston head, the one end and the piston head of plunger rod are connected, under the promotion of plunger rod, the plunger head moves and the piston head moves along stock solution chamber axial motion towards syringe barrel's injection end, thereby make the liquid in the stock solution chamber discharge from syringe barrel's injection end.

Further, the plunger head comprises a plunger barrel and a sealing element; the liquid storage cavity is formed in the plunger cylinder; the sealing element is sleeved at one end of the plunger cylinder, the piston head is positioned at the other end far away from the plunger cylinder, and two ends of the liquid storage cavity are respectively sealed by the sealing element and the piston head; the hole site is opened on the sealing member.

Furthermore, the sealing element is provided with a blocking piece for blocking the hole position, the inner side of the injection end of the syringe cylinder body is provided with a puncturing pipe, the puncturing pipe is communicated with the liquid discharge port of the injection end of the syringe cylinder body, when the plunger head moves close to the injection end of the syringe cylinder body, the puncturing pipe punctures the blocking piece, and liquid in the liquid storage cavity flows to the liquid discharge port from the puncturing pipe.

Furthermore, the sealing element is a member made of soft material.

Furthermore, the side of the piston head facing the sealing piece is an arc-shaped surface, and the shape of the side of the sealing piece facing the piston head is matched with the shape of the arc-shaped surface.

Furthermore, the side surface of the piston head facing the sealing element is provided with a convex blocking column, and when the piston head is abutted against the sealing element, the blocking column is positioned in the hole.

Furthermore, one end of the hole position facing the piston head is trumpet-shaped.

Furthermore, an annular soft sleeve is sleeved at the end part, far away from the sealing element, of the plunger head.

Furthermore, the plunger cylinder is a glass cylinder.

Further, the plunger rod is detachably connected with the piston head.

The invention has the beneficial effects that:

the utility model provides a plunger head stores the medicine through the stock solution chamber, during the use, need not to extract the liquid medicine from the external world, only needs to fill in the plunger barrel with the plunger head in, then promote the plunger rod can, under the promotion of plunger rod, the medicine of the liquid form in the stock solution intracavity is discharged from the stock solution chamber and is discharged from the injection end of syringe barrel, and the use is simple swift and can reduce medicine pollution probability.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an embodiment of the present invention in one operating state;

FIG. 3 is an enlarged schematic view of the portion A in FIG. 2 according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of another working state of the embodiment of the present invention;

fig. 5 is a schematic structural view of a plunger head according to an embodiment of the present invention.

Reference is made to the accompanying drawings in which: 10. a syringe barrel; 11. an inner cavity; 21. a plunger rod; 211. a convex column; 22. a plunger head; 221. a plunger barrel; 2211. a liquid storage cavity; 222. a seal member; 223. a piston head; 224. a soft sleeve member; 2241. and (4) a groove.

Detailed Description

The following detailed description of embodiments of the invention refers to the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and explanation only, not limitation.

Referring to fig. 1 to 5, a syringe includes a syringe barrel 10 and a plunger matching with the syringe barrel 10, wherein the injection end of the syringe barrel 10 is provided with a needle, and the needle is communicated with a liquid outlet of the injection end. The plunger comprises a plunger rod 21 and a plunger head 22 matched with the inner cavity 11 of the syringe barrel 10, and the plunger head 22 is matched with the inner cavity 11 of the syringe barrel 10 to form a piston structure. The plunger head 22 comprises a cylindrical liquid storage cavity 2211 and a piston head 223 arranged in the liquid storage cavity 2211, a piston structure is formed between the piston head 223 and the liquid storage cavity 2211, the piston head 223 can axially reciprocate along the liquid storage cavity 2211, a hole position communicated with the liquid storage cavity 2211 is arranged at one end, away from the piston head 223, of the plunger head 22, one end of the plunger rod 21 is connected with the piston head 223, the plunger head 22 moves towards the injection end of the syringe barrel 10 and the piston head 223 axially moves along the liquid storage cavity 2211 under the pushing of the plunger rod 21, so that liquid in the liquid storage cavity 2211 is discharged from the hole position, and finally the liquid is discharged from the injection end of the syringe barrel 10 and enters the needle.

The utility model provides a plunger head 22 stores the medicine through stock solution chamber 2211, during the use, need not to extract the liquid medicine from the external world, only needs to fill in plunger head 22 in plunger barrel 221, then promote plunger rod 21 can, under the promotion of plunger rod 21, the medicine in the stock solution chamber 2211 is discharged and is discharged from the injection end of syringe barrel 10 from stock solution chamber 2211, and the use is simple swift and can reduce medicine pollution probability. In addition, the plunger can be used as a liquid storage component for separate production and sale, and can also be separately stored.

In this embodiment, the outer port of the interior cavity 11 of the syringe barrel 10 is flared in order to facilitate entry of the plunger tip 22 into the interior cavity 11 of the syringe barrel 10.

In this embodiment, the plunger rod 21 is detachably connected to the plunger head 223, a groove 2241 is disposed on an end surface of the plunger head 223, a protrusion 211 is disposed on an end surface of the plunger rod 21, the protrusion 211 is engaged with the groove 2241, and preferably, the protrusion 211 is in interference fit with the groove 2241. The plunger rod 21 and the plunger head 22 can be stored separately, so that the storage is convenient, and when the plunger is used, only the convex column 211 needs to be assembled on the piston head 223, so that the assembly process is simple and quick. In this embodiment, the plunger head 22 may be used alone as a liquid storage member, and may be mass produced alone. In other embodiments, the plunger rod 21 and the piston head 223 may be fixedly connected.

In this embodiment, the plunger head 22 further includes a plunger barrel 221 and a sealing member 222 disposed at one end of the plunger barrel 221, and in other possible embodiments, the sealing member 222 may also be disposed inside the plunger barrel 221 in a blocking manner. In this embodiment, reservoir 2211 is formed in plunger barrel 221, seal 222 seals one end of plunger barrel 221, piston 223 is disposed in the other end of plunger barrel 221, and both ends of reservoir 2211 are sealed by seal 222 and piston 223, respectively. Specifically, the circumferential side wall of the piston head 223 abuts against the inner wall of the syringe cylinder 10, so that the piston head 223 and the syringe cylinder 10 are combined to form a piston structure, and therefore the piston head 223 can move axially along the liquid storage cavity 2211 and can seal the end part of the liquid storage cavity 2211. In this embodiment, the aperture opening is provided in the seal 222. The sealing cover (not shown) is disposed on the outer side of the sealing member 222, and the sealing cover is disposed on the outer side of the piston head 223, and the sealing cover may be an aluminum cover with a cushion on the inner side, on one hand, the sealing cover can improve the sealing effect of the sealing member 222 and the piston head 223 and prevent the liquid from flowing out from the hole site, and on the other hand, the sealing cover can more firmly limit the piston head 223 and the sealing member 222 on the plunger barrel 221, thereby facilitating the storage and transportation of the plunger head 22 with the liquid medicine. The plunger head 22 can replace medicine bottles used in daily life, the plunger head 22 can be manufactured in batch independently, and the size of the plunger head 22 can be formed into specification size, so that the syringe barrel 10 is suitable for daily use and has wide applicability. When the plunger head 22 is stored, the syringe barrel 10 and the plunger rod 21 are stored separately, the storage environment of the plunger head 22 should be an aseptic environment or be packaged by a vacuum packaging bag, when the plunger head 22 is used, the plunger head 22 is taken out of the vacuum packaging bag, a sealing cover outside the piston head 223 and a sealing cover outside the sealing piece 222 are disassembled, then the plunger head 22 is plugged into the syringe barrel 10, then the plunger rod 21 is assembled, and the plunger rod 21 is pushed.

In this embodiment, the sealing member 222 is provided with the blocking member 40 for blocking the hole, the sealing member 222 is made of a soft material, such as medical silica gel or medical rubber, the material of the blocking member 40 is the same as that of the sealing member, and preferably, the blocking member 40 and the sealing member 222 are integrally formed. The inner side of the injection end of the syringe barrel 10 is provided with a puncture tube 30, the puncture tube 30 is a needle tube made of metal, one end of the puncture tube 30 is embedded in the liquid discharge port of the injection end of the syringe barrel 10, the puncture tube 30 is communicated with the liquid discharge port of the injection end of the syringe barrel 10, and when the plunger head 22 moves close to the injection end of the syringe barrel 10, the puncture tube 30 punctures the plugging piece 40. In use, plunger rod 21 pushes plunger head 22 through plunger head 223 to the injection end of syringe barrel 10, piercing tube 30 pierces stopper 40 and communicates with the reservoir, and plunger rod 21 then pushes plunger head 223 to move from one end of reservoir 2211 to the other end, thereby moving fluid out of reservoir 2211, through piercing tube 30 to the discharge port at the injection end of syringe barrel 10, and finally out of the needle.

In this embodiment, the side of the piston head 223 facing the seal 222 is an arc-shaped surface, the shape of the side of the seal 222 facing the piston head 223 is matched with the shape of the arc-shaped surface, and the side of the piston head 223 facing the seal 222 is provided with a convex blocking column, so that when the piston head 223 abuts against the seal 222, the blocking column can enter the piercing tube, and liquid remained in the piercing tube can be squeezed out.

In the present embodiment, an annular soft sleeve 224 is sleeved on an end portion of the plunger tip 22 away from the sealing element 222, and a circumferential side wall of the soft sleeve 224 abuts against a side wall of the syringe barrel 10, so that the soft sleeve 224 and the syringe barrel 10 are combined to form a piston structure, and a material of the soft sleeve 224 is the same as a material of the sealing element 222.

In this embodiment, the plunger cylinder 221 is a glass cylinder.

Any combination of the various embodiments of the present invention should be considered as disclosed in the present invention, unless the inventive concept is contrary to the present invention; within the scope of the technical idea of the invention, any combination of various simple modifications and different embodiments of the technical solution without departing from the inventive idea of the present invention shall fall within the protection scope of the present invention.

Claims

1. a syringe comprising a syringe barrel and a plunger matched with the syringe barrel, the plunger comprising a plunger rod and a plunger head matched with the inner cavity of the syringe barrel, characterized in that, The plunger head includes a liquid storage cavity and a piston head arranged in the liquid storage cavity and can reciprocate axially along the liquid storage cavity, and the end of the plunger head away from the piston head is provided with a communication In the hole position of the liquid storage chamber, one end of the plunger rod is connected with the piston head, and when the plunger rod is pushed, the plunger head moves toward the injection end of the syringe barrel and the plunger head moves toward the injection end of the syringe barrel. The piston head moves axially along the liquid storage chamber, so that the liquid in the liquid storage chamber is discharged from the injection end of the syringe barrel.

2. The syringe according to claim 1, wherein the plunger head comprises a plunger barrel and a sealing member; a liquid storage cavity is formed in the plunger barrel; the sealing member is sleeved on One end of the plunger cylinder, the piston head is located at the other end away from the plunger cylinder, and the two ends of the liquid storage chamber are respectively sealed by the seal and the piston head; the hole position open on the seal.

3. The syringe according to claim 2, wherein the sealing member is provided with a blocking member for blocking the hole, and a piercing tube is provided on the inner side of the injection end of the syringe barrel, and the piercing The tube communicates with the liquid discharge port of the injection end of the syringe barrel, when the plunger head moves close to the injection end of the syringe barrel, the piercing tube pierces the blocking member, and the liquid storage cavity is The liquid flows from the piercing tube to the drain.

4. The syringe of claim 2, wherein the seal is a member of a soft material.

5 . The syringe of claim 2 , wherein the side surface of the piston head facing the seal is an arc surface, and the shape of the side surface of the seal facing the piston head is the same as the arc surface. 6 . shape to match.

6 . The syringe of claim 5 , wherein the side of the piston head facing the seal is provided with a protruding blocking post, and when the piston head is in contact with the seal, the A plugging post is located within the hole location.

7 . The syringe of claim 6 , wherein an end of the hole facing the piston head is trumpet-shaped. 8 .

8. The syringe of claim 2, wherein an annular soft sleeve is sleeved at the end of the plunger head away from the seal.

9. The syringe of claim 2, wherein the plunger barrel is a glass barrel.

10. The syringe of claim 1, wherein the plunger rod and the piston head are connected in a detachable manner.