CN210020663U

CN210020663U - Low-residue pre-filling and sealing injector

Info

Publication number: CN210020663U
Application number: CN201920488164.1U
Authority: CN
Inventors: 赵立品; 曹志峰; 赖家春; 邓伟; 张宏飞; 梁诗雨; 赵莉; 羊俊儒; 高洁
Original assignee: CHONGZHOU JUNJIAN PLASTIC Co Ltd
Current assignee: CHONGZHOU JUNJIAN PLASTIC Co Ltd
Priority date: 2019-04-11
Filing date: 2019-04-11
Publication date: 2020-02-07
Anticipated expiration: 2029-04-11

Abstract

The utility model relates to a low-residue pre-filled and sealed injector, which comprises a sleeve, a push rod and a piston, wherein one end of the sleeve is provided with an opening, the other end of the sleeve is provided with a connector with internal threads, a conical head is arranged in the connector, a channel is arranged on the conical head, the channel penetrates through the conical head and is communicated with the interior of the sleeve, and the inner diameter of the channel is 0.18-0.41 mm; the piston is wrapped at one end of the push rod, and the piston and the push rod are sleeved and sealed in the sleeve together. The utility model realizes the effect of reducing the residual quantity of the liquid medicine by changing the inner diameter of the channel, and has simple principle and good practical application effect; the protective cap is arranged to prevent the liquid medicine in the sleeve from being infected; the injection is carried out by setting the capacity scale marks to match with the zero scale marks on the outer wall of the sleeve, so that the accuracy of the injection amount can be improved; the self-locking function is realized by arranging the V-shaped elastic sheets and the barbs which are matched with each other, so that the syringe is prevented from being repeatedly used and causing cross infection.

Description

Low-residue pre-filling and sealing injector

Technical Field

The utility model relates to a medicine packaging container technical field particularly, relates to a low embedment syringe in advance that remains.

Background

For a long time, the packaging for injection in the medical field is a penicillin bottle, and the medicament is firstly pumped into an injector and then injected when in use, however, the practical application finds that the injection mode has many inconveniences, so that a medicament pre-filling and sealing technology is developed. The pre-encapsulation means that the medicine is directly filled into the injector for storage, so that the use is more convenient, and the medicine can be stored for a long time. However, the inner diameter of a channel of a conical head of an existing prefilled syringe is usually larger, generally about 1.2mm, and during actual injection, more liquid medicine is usually left in the conical head of the syringe, so that the actual injection amount is lower than the theoretical injection amount, and injection errors are caused; meanwhile, the existing pre-filling and sealing injector has the problem of being repeatedly utilized by lawless persons, and is easy to cause cross infection.

SUMMERY OF THE UTILITY MODEL

A first object of the utility model is to provide a low embedment syringe in advance that remains, it can reduce the liquid medicine of remaining in the conical head, has self-locking function simultaneously, avoids being used repeatedly.

The embodiment of the utility model is realized like this: a low-residue pre-filled and sealed injector comprises a sleeve, a push rod and a piston, wherein one end of the sleeve is provided with an opening, the other end of the sleeve is provided with a connector with internal threads, a conical head is arranged in the connector, a channel is formed in the conical head, the channel penetrates through the conical head and is communicated with the interior of the sleeve, and the inner diameter of the channel is 0.18-0.41 mm;

the piston is wrapped at one end of the push rod, and the piston and the push rod are sleeved and sealed in the sleeve together.

Further, still include the helmet, set up the holding tank that corresponds with the conical head on the helmet, the holding tank outside is seted up with the corresponding spread groove of connector, the spread groove inner wall set up with the external screw thread of the internal thread looks adaptation of connector, in order to realize helmet and connector threaded connection.

Furthermore, the outer wall of the sleeve is provided with zero scale marks, the cross section of the push rod is in a cross shape, the outer wall of the push rod is provided with capacity scale marks, and the capacity scale marks correspond to the zero scale marks of the sleeve.

Furthermore, the side of the inner wall of the sleeve, which is close to the opening, is provided with a V-shaped elastic sheet, and the side of the outer wall of the push rod, which is far away from the piston, is provided with an agnail matched with the V-shaped elastic sheet.

Furthermore, the sleeve is made of polypropylene or cycloolefin polymer.

Further, the piston is a TPE injection molding rubber plug or a butyl rubber plug.

Further, one end, away from the sleeve, of the conical head is of an arc-shaped structure.

Furthermore, a blocking head corresponding to the channel is arranged at the top in the accommodating groove.

The utility model has the advantages that:

the utility model realizes the effect of reducing the residual quantity of the liquid medicine by changing the inner diameter of the channel, and has simple principle and good practical application effect; by arranging the protective cap, the self-sealing performance of the injector can be further improved, and the liquid medicine in the sleeve is prevented from being infected; the injection is carried out by setting the capacity scale marks to match with the zero scale marks on the outer wall of the sleeve, so that the accuracy of the injection amount can be improved; the self-locking function is realized by arranging the V-shaped elastic sheets and the barbs which are matched with each other, so that the syringe is prevented from being repeatedly used and causing cross infection.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is a main sectional view of a structure of a syringe provided in embodiment 1 of the present invention when the syringe is not injected;

fig. 2 is a main sectional view of the structure of the syringe provided in embodiment 1 of the present invention when completing injection;

fig. 3 is a structural sectional view of a protective cap provided in embodiment 1 of the present invention;

icon: 1-sleeve, 2-push rod, 3-piston, 4-connector, 5-conical head, 6-channel, 7-protective cap, 8-capacity scale mark, 9-V-shaped elastic sheet, 10-barb, 11-blocking head and 12-liquid medicine.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

Referring to fig. 1 and 2, the present embodiment provides a low residue prefilled syringe, including a sleeve 1, a push rod 2 and a piston 3, one end of the sleeve 1 is an opening, the other end of the sleeve 1 is provided with a connector 4 with internal threads, a conical head 5 is arranged in the connector 4, a channel 6 is arranged on the conical head 5, the channel 6 penetrates through the conical head 5 and is communicated with the interior of the sleeve 1, the liquid medicine 12 in the sleeve 1 is finally discharged through the channel 6, in order to reduce the liquid medicine 12 remaining in the channel 6 as much as possible, the inner diameter of the channel 6 is 0.18-0.41 mm, so that the inner diameter of the channel 6 is equivalent to the aperture of a syringe needle, and the purpose of reducing the residue of the liquid medicine;

referring to fig. 1 and 2, the piston 3 is wrapped at one end of the push rod 2, and the piston 3 and the push rod 2 are jointly sleeved in the sleeve 1.

Referring to fig. 1 and 3, in order to improve the leakproofness of syringe, still include helmet 7 in further preferred embodiment, the holding tank that corresponds with conical head 5 has been seted up on helmet 7, the holding tank outside is seted up with the corresponding spread groove of connector 4, the external screw thread with the internal thread looks adaptation of connector 4 is seted up to the spread groove inner wall, in order to realize helmet 7 and connector 4 threaded connection, when not injecting, will protect cap 7 lid on connector 4 for in conical head 5 imbeds the holding tank, in the connector 4 imbeds the spread groove and screw up helmet 7, prevent that liquid medicine 12 in the sleeve 1 from being infected.

Referring to fig. 1 and 2, in order to make the injection more accurate and avoid generating a large error when injecting the liquid medicine 12, the outer wall of the sleeve 1 is provided with zero scale marks, the cross section of the push rod 2 is cross-shaped so as to improve the structural strength of the push rod 2 itself, the outer wall of the push rod 2 is provided with capacity scale marks 8, the capacity scale marks 8 correspond to the zero scale marks of the sleeve 1, and the injection is performed by matching the capacity scale marks 8 on the push rod 2 with the zero scale marks on the outer wall of the sleeve 1 during the injection, so that the injection amount is more accurate and the injection error caused by human observation error is reduced.

Referring to fig. 1 and 2, in order to realize the self-locking function of the syringe, in a further preferred embodiment, a V-shaped elastic sheet 9 is arranged on one side of the inner wall of the sleeve 1, which is close to the opening, the open end of the V-shaped elastic sheet 9 faces one end of the connector 4 of the sleeve 1, and an agnail 10 matched with the V-shaped elastic sheet 9 is arranged on one side of the outer wall of the push rod 2, which faces away from the piston 3; when not injecting, the V-shaped elastic sheet 9 on the sleeve 1 is positioned between the piston 3 and the barb 10; during injection, the push rod 2 is continuously pushed forwards, the barb 10 on the push rod 2 extrudes the elastic arm of the V-shaped elastic sheet 9, the barb 10 smoothly passes through the V-shaped elastic sheet 9, after the barb 10 passes through the V-shaped elastic sheet 9, the elastic arm of the V-shaped elastic sheet 9 automatically resets and forms a self-locking structure with the barb 10, the push rod 2 can not be pulled out any more, and the syringe is prevented from being repeatedly used to cause cross infection.

In a further preferred embodiment, the sleeve 1 is made of polypropylene or a cyclic olefin polymer material, and the sleeve 1 is made of a hydrophobic material, so as to further reduce the residual amount of the medical fluid 12 in the sleeve 1.

In a further preferred embodiment, the piston 3 is a TPE injection molded rubber plug or butyl rubber plug.

With reference to fig. 1, in a further preferred embodiment, the end of the conical head 5 facing away from the sleeve 1 is of an arc-shaped configuration.

Referring to fig. 1 and 3, in a further preferred embodiment, a blocking head 11 corresponding to the channel 6 is disposed at the top inside the receiving groove, and when the protective cap 7 covers the connecting head 4, the blocking head 11 is just embedded into the channel 6, so as to further perform a sealing function, and improve the sealing performance between the connecting head 4 and the protective cap 7.

The working principle is as follows: this syringe is when in actual use, screws up protective cap 7 on connector 4 earlier, will need the liquid medicine 12 of pre-sealing jar to add sleeve 1 in through sleeve 1's open end, adds piston 3 and push rod 2 in proper order in sleeve 1 afterwards for sleeve 1 forms a seal structure and seals up liquid medicine 12 and keep in sleeve 1. When needs are injected, take off protective cap 7, accomplish the injection of liquid medicine 12 through promoting push rod 2, when piston 3 contradicts with the interior bottom of sleeve 1, accomplish the injection of liquid medicine 12, barb 10 on the push rod 2 forms a auto-lock structure with the V-arrangement shell fragment 9 of sleeve 1 inner wall simultaneously, avoids the syringe to be recycled.

In summary, the utility model realizes the effect of reducing the residual quantity of the liquid medicine 12 by changing the inner diameter of the channel 6, and has simple principle and good practical application effect; the arrangement of the protective cap 7 can further improve the sealing performance of the syringe and prevent the liquid medicine 12 in the sleeve 1 from being infected; the capacity scale mark 8 is arranged to be matched with a zero scale mark on the outer wall of the sleeve 1 for injection, so that the accuracy of the injection amount can be improved; the self-locking function is realized by arranging the V-shaped elastic sheets 9 and the barbs 10 which are matched with each other, so that the phenomenon that the injector is repeatedly used to cause cross infection is avoided.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A low-residue pre-filled and sealed syringe is characterized in that: the anti-theft device comprises a sleeve (1), a push rod (2) and a piston (3), wherein one end of the sleeve (1) is provided with an opening, the other end of the sleeve (1) is provided with a connector (4) with internal threads, a conical head (5) is arranged in the connector (4), a channel (6) is formed in the conical head (5), the channel (6) penetrates through the conical head (5) and is communicated with the interior of the sleeve (1), and the inner diameter of the channel (6) is 0.18-0.41 mm;

the piston (3) is coated at one end of the push rod (2), and the piston (3) and the push rod (2) are sleeved and sealed in the sleeve (1) together.

2. The low residue pre-filled and sealed syringe of claim 1, further comprising: still include and protect cap (7), protect and offer the holding tank that corresponds with conical head (5) on cap (7), the holding tank outside is seted up with the corresponding spread groove of connector (4), the external screw thread with the internal thread looks adaptation of connector (4) is seted up to the spread groove inner wall, in order to realize protect cap (7) and connector (4) threaded connection.

3. The low residue pre-filled and sealed syringe of claim 1, further comprising: the outer wall of the sleeve (1) is provided with zero scale marks, the cross section of the push rod (2) is cross-shaped, the outer wall of the push rod (2) is provided with capacity scale marks (8), and the capacity scale marks (8) correspond to the zero scale marks of the sleeve (1).

4. The low residue pre-filled and sealed syringe of claim 1, further comprising: the inner wall of sleeve (1) is close to opening one side and is provided with V-arrangement shell fragment (9), the outer wall of push rod (2) deviates from piston (3) one side and is provided with barb (10) with V-arrangement shell fragment (9) looks adaptation.

5. The low residue pre-filled and sealed syringe of claim 1, further comprising: the sleeve (1) is made of polypropylene or cycloolefin polymer.

6. The low residue pre-filled and sealed syringe of claim 1, further comprising: the piston (3) is a TPE injection molding rubber plug or a butyl rubber plug.

7. The low residue pre-filled and sealed syringe of claim 1, further comprising: one end of the conical head (5) departing from the sleeve (1) is of an arc-shaped structure.

8. The low residue pre-filled and sealed syringe of claim 2, further comprising: and a blocking head (11) corresponding to the channel (6) is arranged at the top in the accommodating groove.