CN212940880U

CN212940880U - Disposable safety syringe

Info

Publication number: CN212940880U
Application number: CN202020715016.1U
Authority: CN
Inventors: 王丽明; 胡欣欣; 胡军飞; 何广军
Original assignee: Zhejiang Lingyang Medical Apparatus Co ltd
Current assignee: Zhejiang Lingyang Medical Apparatus Co ltd
Priority date: 2020-04-30
Filing date: 2020-04-30
Publication date: 2021-04-13
Anticipated expiration: 2030-04-30

Abstract

The utility model discloses a disposable safety injector, which comprises a needle cylinder, a piston rod, a piston, a needle tube and a protective sleeve, wherein the needle cylinder is of a hollow structure, two ports of the needle cylinder are respectively a big port and a small port, the piston rod is embedded in the cavity of the needle cylinder through the big port, the piston sleeve is arranged on the end part of the piston rod positioned in the needle cylinder, the small port is provided with a hollow tube, the connecting end of the needle tube is arranged on the hollow tube, the protective sleeve is provided with an opening end, and the needle tube is sealed after the opening end is sleeved on the hollow tube; the sealing ring that has radial outside setting on the hollow tube outer wall is provided with easy cracked connecting strip between the open end of sealing ring and sheath, and the connecting strip has a plurality of and circumference evenly distributed. The utility model discloses be connected sealing ring and sheath through easy cracked connecting strip to the broken quick connecting strip that can be very convenient when rotating the sheath, and then take off the sheath from the sealing ring, prevented the possibility that the syringe was retrieved once more, improved user's personal safety.

Description

Disposable safety syringe

Technical Field

The utility model belongs to the technical field of medical supplies, especially, relate to a disposable safety syringe.

Background

Syringes are a very common medical product for mixing drugs and injecting the drugs into a human body through a needle of the syringe, thereby rehabilitating the human body or producing pathogenic antibodies.

In order to ensure safety and prevent cross infection, the syringe is generally a disposable article and needs to be destroyed after use, however, some illegal traders sterilize the disposable syringe or simply treat the disposable syringe and then package the disposable syringe again for use, thereby damaging the personal safety of patients, and therefore, a safety syringe avoiding recovery is needed to be provided.

SUMMERY OF THE UTILITY MODEL

The utility model aims at the technical problem who exists, provide a disposable safety syringe, when opening the sheath on the needle tubing, need destroy the connecting strip between sheath and the cylinder, and then avoided the problem of retrieving once more to take place, improved user's personal safety.

The purpose of the utility model is realized like this: the utility model provides a disposable safety syringe, includes cylinder, piston rod, piston, needle tube and sheath, the cylinder is hollow structure, and its both ends mouth is big port and port respectively, the piston rod passes through big port inlays to be located in the cylinder cavity, and follow the length direction of cylinder slides and sets up, the piston housing is located being located of piston rod on the tip in the cylinder, just the outer fringe of piston closely laminate in the inner wall of cylinder, be provided with on the port with the cylinder hollow tube as an organic whole, the link of needle tube set up in on the hollow tube, the sheath has an open end, and this open end cover is located after on the hollow tube will the needle tube is sealed its characterized in that: the outer wall of the hollow pipe is provided with a sealing ring which is arranged radially outwards, an easily-broken connecting strip is arranged between the sealing ring and the open end of the sheath, and the connecting strip is provided with a plurality of sealing rings which are evenly distributed in the circumferential direction.

The utility model discloses further set up to: the sealing ring, the connecting strips and the sheath are of an integral structure, the sealing ring is tightly sleeved on the hollow tube, and the external force for driving the sealing ring to rotate on the hollow tube is larger than the external force for driving the sheath to rotate and fracture the connecting strips.

The utility model discloses further set up to: the outer wall of the hollow pipe is provided with a blocking ring which is arranged outwards in the radial direction, the blocking ring is provided with an annular groove for embedding the sealing ring, the connecting strip and the opening end of the sheath, the inner wall of the annular groove is provided with a clamping jaw with certain elastic deformation, the outer wall of the sealing ring is provided with a positioning groove, in the process that the sealing ring is embedded into the annular groove, the outer wall of the annular groove extrudes the head of the clamping jaw and enables the clamping jaw to bend towards the inner wall of the annular groove, when the positioning groove on the sealing ring is opposite to the head of the clamping jaw, the head of the clamping jaw loses external force, and under the action of elastic restoring force, the head of the clamping jaw is pulled into the positioning groove and limits the.

The utility model discloses further set up to: the locating grooves on the sealing ring are more than two, and the number of the clamping jaws in the retaining ring is the same as that of the locating grooves and corresponds to that of the locating grooves one to one.

The utility model discloses further set up to: and a press hand is arranged at one end of the piston rod, which extends out of the needle cylinder, and the outer diameter of the press hand is larger than that of the piston rod.

The utility model discloses further set up to: the outer wall of the needle cylinder is provided with a scale, and the scale is provided with a graduation capacity line and a nominal capacity line.

The utility model has the advantages that: 1. the outer wall of the hollow pipe is provided with a sealing ring which is arranged radially outwards, an easily-broken connecting strip is arranged between the sealing ring and the opening end of the sheath, and a plurality of connecting strips are uniformly distributed in the circumferential direction; the sealing ring is connected with the sheath through the easily-broken connecting strip, so that the connecting strip can be broken conveniently when the sheath is rotated, the sheath is taken down from the sealing ring, the possibility of recycling the syringe again is prevented, and the personal safety of a user is improved; 2. the hollow tube is provided with the baffle ring, and the opening end of the sheath is embedded into the annular groove of the baffle ring to achieve the purpose of installing the sheath, so that the sealing performance of the sheath on the needle tube can be improved, and the pollution is avoided; the sealing ring is fixed in the annular groove of the baffle ring in a clamping manner, so that the connecting strength is high, and the assembly is more convenient and more visual.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a schematic view of the sheath of the present invention being fixed to the hollow tube;

FIG. 3 is an enlarged view at A in FIG. 2;

the reference numbers in the figures are: 1. a needle cylinder; 11. a hollow tube; 12. a baffle ring; 121. an annular groove; 122. a claw; 13. a scale; 131. a graduated capacity line; 132. a nominal capacity line; 2. a piston rod; 21. pressing the hand; 3. a piston; 4. a needle tube; 5. a sheath; 51. a seal ring; 511. positioning a groove; 52. and (4) connecting strips.

Detailed Description

In order to make the technical solutions in the present invention better understood by those skilled in the art, the technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the accompanying drawings:

a disposable safety syringe, as shown in fig. 1, fig. 2 and fig. 3, comprises a needle cylinder 1, a piston rod 2, a piston 3 and a needle tube 4, wherein the needle cylinder 1 is of a hollow structure, two ports of the needle cylinder 1 are respectively a large port and a small port, the piston rod 2 is embedded in the cavity of the needle cylinder 1 through the large port and is arranged in a sliding manner along the length direction of the needle cylinder 1, the piston 3 is sleeved on the end part of the piston rod 2 positioned in the needle cylinder 1, the outer edge of the piston 3 is tightly attached to the inner wall of the needle cylinder 1, a hollow tube 11 integrated with the needle cylinder 1 is arranged on the small port, and the connecting end of the needle tube 4 is arranged on;

the piston rod 2 and the piston 3 are pulled outwards, so that negative pressure is generated in a cavity between the needle tube 4 and the piston 3, and the liquid medicine is further sucked into the needle cylinder 1; during injection, the piston rod 2 and the piston 3 are pressed, so that the liquid medicine in the syringe 1 can be injected outwards through the needle tube 4.

The injector further comprises a sheath 5, the sheath 5 is provided with an open end, the open end is sleeved on the hollow tube 11 and then seals the needle tube 4, wherein the outer wall of the hollow tube 11 is provided with a sealing ring 51 which is radially and outwards arranged, an easily broken connecting strip 52 is arranged between the sealing ring 51 and the open end of the sheath 5, and the connecting strip 52 is provided with a plurality of connecting strips which are evenly distributed in the circumferential direction.

The sealing ring 51 and the sheath 5 are connected through the connecting strip 52 which is easy to break, so that the connecting strip 52 can be broken conveniently when the sheath 5 is rotated, the sheath 5 is taken down from the sealing ring 51, the possibility of recycling the syringe again is prevented, and the personal safety of a user is improved.

The sealing ring 51, the connecting strips 52 and the sheath 5 are of an integral structure, the sealing ring 51 is tightly sleeved on the hollow tube 11, and the external force for driving the sealing ring 51 to rotate on the hollow tube 11 is larger than the external force for driving the sheath 5 to rotate and enabling the connecting strips 52 to be broken. Wherein the sealing ring 51, the connecting strip 52 and the sheath 5 are provided as one body for easy processing; the sealing ring 51 is arranged on the hollow tube 11 in an interference fit mode or both the sealing ring and the hollow tube are bonded together through plastic glue, and the assembly is very convenient.

There is radial outside fender ring 12 that sets up on the outer wall of hollow tube 11, fender ring 12 is last to be seted up and is supplied sealing ring 51, the ring channel 121 of the open end embedding of connecting strip 52 and sheath 5, be provided with the jack catch 122 that has certain elastic deformation on the ring channel 121 inner wall, constant head tank 511 has been seted up on sealing ring 51's the outer wall, the in-process in sealing ring 51 embedding ring channel 121, the head of the outer wall extrusion jack catch 122 of ring channel 121 makes jack catch 122 crooked to the inner wall of ring channel 121, when constant head tank 511 on sealing ring 51 is just right to the head to jack catch 122, the head of jack catch 122 loses external force, the head of jack catch 122 is pulled to be embedded in constant head tank 511 and is restricted sealing ring 51.

The hollow tube 11 is provided with the baffle ring 12, and the opening end of the sheath 5 is embedded into the annular groove 121 of the baffle ring 12 to achieve the purpose of installing the sheath 5, so that the sealing performance of the sheath 5 on the needle tube 4 can be improved, and the pollution is avoided; the sealing ring 51 is fixed in the annular groove 121 of the baffle ring 12 in a clamping manner, so that the connecting strength is high, the assembly is more convenient and more visual, and the end part of the sealing ring 51 can be set to be conical in order to embed the sealing ring 51 into the annular groove 121.

Preferably, more than two positioning grooves 511 are arranged on the sealing ring 51, and the number of the claws 122 in the baffle ring 12 is the same as that of the positioning grooves 511, and the claws correspond to one another, so that the connection strength between the sealing ring 51 and the baffle ring is improved.

Optimally, one end of the piston 3, which extends out of the needle cylinder 1, of the rod 2 is provided with a press hand 21, the outer diameter of the press hand 21 is larger than that of the piston 3, the press hand 21 is arranged to be convenient for an operator to use, and when the piston 3 and the rod 2 are pulled outwards, the press hand 21 can provide a stress point, so that the liquid medicine can be extracted more conveniently.

Preferably, in order to facilitate accurate and quantitative extraction of the liquid medicine by the operator, a scale 13 is provided on the outer wall of the cylinder 1, and the scale 13 has a graduation capacity line 131 and a nominal capacity line 132.

The above embodiments are only preferred embodiments of the present invention, not all embodiments, and other embodiments obtained based on the above embodiments by those skilled in the art without any creative work shall fall within the protection scope of the present invention, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. A disposable safety syringe comprises a needle cylinder (1), a piston rod (2), a piston (3), a needle tube (4) and a sheath (5), wherein the needle cylinder (1) is of a hollow structure, two ports of the needle cylinder are respectively a big port and a small port, the piston rod (2) is embedded in the cavity of the needle cylinder (1) through the big port and slides along the length direction of the needle cylinder (1), the piston (3) is sleeved on the end part, located in the needle cylinder (1), of the piston rod (2), the outer edge of the piston (3) is tightly attached to the inner wall of the needle cylinder (1), a hollow tube (11) which is integrated with the needle cylinder (1) is arranged on the small port, the connecting end of the needle tube (4) is arranged on the hollow tube (11), the sheath (5) is provided with an open end, and the open end is sleeved on the hollow tube (11) and then seals the needle tube (4), the method is characterized in that: the outer wall of the hollow pipe (11) is provided with a sealing ring (51) which is arranged outwards in the radial direction, an easily-broken connecting strip (52) is arranged between the sealing ring (51) and the opening end of the sheath (5), and the connecting strip (52) is provided with a plurality of connecting strips which are evenly distributed in the circumferential direction.

2. A single use safety syringe according to claim 1 wherein: the sealing ring (51), the connecting strips (52) and the sheath (5) are of an integral structure, the sealing ring (51) is tightly sleeved on the hollow pipe (11), and the external force for driving the sealing ring (51) to rotate on the hollow pipe (11) is larger than the external force for driving the sheath (5) to rotate and enabling the connecting strips (52) to break.

3. A single use safety syringe according to claim 2 wherein: the outer wall of the hollow pipe (11) is provided with a blocking ring (12) which is arranged outwards in the radial direction, the blocking ring (12) is provided with an annular groove (121) which is used for embedding the sealing ring (51), the connecting strip (52) and the opening end of the sheath (5), the inner wall of the annular groove (121) is provided with a clamping jaw (122) with certain elastic deformation, the outer wall of the sealing ring (51) is provided with a positioning groove (511), the sealing ring (51) is embedded into the annular groove (121), the outer wall of the annular groove (121) extrudes the head of the clamping jaw (122) and enables the clamping jaw (122) to bend towards the inner wall of the annular groove (121), when the positioning groove (511) on the sealing ring (51) is opposite to the head of the clamping jaw (122), the head of the clamping jaw (122) loses external force, and the head of the clamping jaw (122) is dragged into the positioning groove (511) under the action of elastic restoring force and limits the sealing ring (51) And (4) rotating.

4. A single use safety syringe according to claim 3 wherein: the number of the positioning grooves (511) on the sealing ring (51) is more than two, and the number of the clamping claws (122) in the baffle ring (12) is the same as that of the positioning grooves (511) and corresponds to that of the positioning grooves one to one.

5. A single use safety syringe according to any one of claims 1 to 4 wherein: a press handle (21) is arranged at one end of the piston rod (2) extending out of the needle cylinder (1), and the outer diameter of the press handle (21) is larger than that of the piston rod (2).

6. A single use safety syringe according to any one of claims 1 to 4 wherein: the outer wall of the needle cylinder (1) is provided with a scale (13), and the scale (13) is provided with a graduation capacity line (131) and a nominal capacity line (132).