CN212067362U

CN212067362U - Prefilled syringe seals syringe injection head seal structure

Info

Publication number: CN212067362U
Application number: CN201922321356.6U
Authority: CN
Inventors: 刘小英; 黄洪; 施小玲; 陈汝慧
Original assignee: Chengdu Qingshan Likang Pharmaceutical Co Ltd
Current assignee: Chengdu Qingshan Likang Pharmaceutical Co Ltd
Priority date: 2019-12-20
Filing date: 2019-12-20
Publication date: 2020-12-04
Anticipated expiration: 2029-12-20

Abstract

The utility model relates to the technical field of medical injectors, in particular to a sealing structure of an injection head of a pre-filling and sealing injector; the adopted technical scheme is as follows: a pre-filled and sealed injector injection head sealing structure comprises a spiral head, an injection head and a protective cap, wherein the spiral head and the protective cap are in threaded connection, the spiral head is sleeved outside the injection head, and the spiral head and the injection head are both fixedly connected with a needle cylinder; the spiral head overcoat is equipped with solid fixed ring, gu fixed ring is connected with the helmet through a plurality of splice bars, the splice bar is fracture when rotating the helmet. The utility model can increase the connection stability of the protective cap and the spiral head and reduce the loosening of the protective cap caused by transportation; and the connecting rib is broken when the protective cap is rotated, so that whether the protective cap rotates can be easily distinguished, the contaminated pre-filled and sealed syringe is prevented from being put into use, and the treatment safety is ensured.

Description

Prefilled syringe seals syringe injection head seal structure

Technical Field

The utility model relates to a medical syringe technical field, concretely relates to embedment syringe injection head seal structure in advance.

Background

The prefilled syringe fills liquid medicine or medicinal powder in the syringe, then seals the injection head through the protective cap, and is placed in the sterilization cabinet for storage, so that the prefilled syringe has two functions of medicine storage and common injection, is safe and reliable, reduces labor and cost consumed from production to use to the maximum extent compared with the traditional mode of 'medicine bottle + syringe', and brings advantages in many aspects as long as air pressure and clinical use are achieved.

The injection head of the existing pre-filled and sealed injector is generally sealed by screwing a protective cap, and the protective cap is easy to loosen in the transportation process, so that the medicine in the injector is exposed in the air, and the sterile environment of the medicine is damaged. For the pre-filled syringe with the loosened protective cap or the pre-filled syringe which is unscrewed from the protective cap but not injected, medical staff cannot easily perceive the syringe, the treatment effect on patients is influenced, and even the life safety is threatened.

SUMMERY OF THE UTILITY MODEL

To the above-mentioned technical problem that the embedment syringe is difficult to differentiate in advance that has polluted, the utility model provides a embedment syringe injection head seal structure in advance can differentiate out embedment syringe helmet in advance and whether become flexible, prevents that the embedment syringe in advance that has polluted from coming into use, ensures treatment safety.

The utility model discloses a following technical scheme realizes:

a sealing structure of an injection head of a pre-filled and sealed injector comprises a spiral head, the injection head and a protective cap, wherein the spiral head is sleeved outside the injection head and is in threaded connection with the protective cap, and the spiral head and the injection head are both fixedly connected with a needle cylinder; the spiral head overcoat is equipped with solid fixed ring, gu fixed ring is connected with the helmet through a plurality of splice bars, the splice bar is fracture when rotating the helmet.

The utility model discloses a spiral head overcoat is equipped with solid fixed ring, and solid fixed ring passes through the splice bar to be connected with the helmet, can increase the steadiness that helmet and spiral head are connected, reduces because of the transportation helmet that leads to is not hard up. Meanwhile, the connecting ribs are broken when the protective cap is rotated, so that whether the protective cap rotates can be easily distinguished, the contaminated pre-filling and sealing syringe is prevented from being put into use, and the treatment safety is ensured.

As a specific implementation mode of connecting the spiral head and the protective cap, the spiral head is an internal thread sleeve, one end of the protective cap is provided with a thread column, and the thread column is in threaded connection with the spiral head so as to increase the sealing area between the injection head and the protective cap and improve the sealing performance of the injector.

Furthermore, the end part of the threaded column is provided with a blind hole, and the injection head is inserted into the blind hole so as to further improve the sealing property between the injection head and the protective cap.

Preferably, the injection head is conical, the blind hole is a tapered hole, and the side wall of the blind hole and the side wall of the injection head form a tapered surface seal, so that the sealing performance of the injection head is further improved, and the pollution caused by the contact of the medicine in the injector and air before use is prevented.

Preferably, the connecting ribs are uniformly distributed along the circumferential direction of the fixing ring.

Furthermore, a plurality of anti-skidding protrusions are arranged on the outer portion of one end, opposite to the threaded column, of the protective cap, so that the protective cap is prevented from skidding when the protective cap is opened.

As a specific embodiment of the stud, the stud is a rib extending along the length of the cap.

Compared with the prior art, the utility model, following advantage and beneficial effect have:

1. the utility model discloses a spiral head overcoat is equipped with solid fixed ring, and solid fixed ring passes through the splice bar to be connected with the helmet, can increase the steadiness that helmet and spiral head are connected, reduces because of the transportation helmet that leads to is not hard up. Meanwhile, the connecting ribs are broken when the protective cap is rotated, so that whether the protective cap rotates can be easily distinguished, the contaminated pre-filling and sealing syringe is prevented from being put into use, and the treatment safety is ensured.

2. The spiral head is equipped with the screw thread post for internal thread cover, helmet one end, screw thread post tip is equipped with the blind hole, and the blind hole lateral wall forms the conical surface with the injection head lateral wall and seals, can improve the sealing performance between helmet and the injection head, prevents that the medicine in the syringe from leading to the fact the pollution with the air contact before using.

Drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Reference numbers and corresponding part names in the drawings:

1-screw head, 12-fixing ring, 13-connecting rib, 2-injection head, 3-protective cap, 31-threaded column, 32-blind hole, 33-anti-skid projection and 4-syringe.

Detailed Description

To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.

Examples

A sealing structure of an injection head of a pre-filling and sealing injector comprises a spiral head 1, an injection head 2 and a protective cap 3. The screw head 1 is sleeved outside the injection head 2, and the screw head 1 is in threaded connection with the protective cap 3; the spiral head 1 and the injection head 2 are both fixedly connected with the needle cylinder 4, and usually the injection head 2, the spiral head 1 and the needle cylinder 4 are integrally injection-molded. A fixing ring 12 is sleeved outside the screw head 1, the fixing ring 12 is connected with the protective cap 3 through a plurality of connecting ribs 13, and the connecting ribs 13 are broken when the protective cap 3 is rotated; that is, the cap 3 and the fixing ring 12 form a plastic anti-theft bottle cap, and the processing technology is the same as the processing mode of the plastic anti-theft bottle cap of the existing beverage bottle, i.e. polyolefin is generally used as the main raw material and is processed and formed by injection molding, hot pressing or other technologies.

It can be understood that the screw head 1 of the injector is externally sleeved with a fixing ring 12, and the fixing ring 12 is connected with the protective cap 3 through a connecting rib 13 to form a plastic anti-theft end cover; can increase the steadiness that helmet 3 and spiral head 1 are connected on the one hand, reduce because of the transportation helmet 3 that leads to is not hard up, on the other hand can increase the leakproofness between helmet 3 and spiral head 1. Meanwhile, the connecting ribs 13 are broken when the protective cap 3 is rotated, so that whether the protective cap 3 rotates or not can be easily distinguished, the contaminated pre-filled and sealed injector is prevented from being put into use, and the treatment safety is ensured.

As a specific embodiment of the connection between the screw head 1 and the protective cap 3, the screw head 1 is an internal thread sleeve, one end of the protective cap 3 is provided with a threaded column 31, and the threaded column 31 is screwed in the screw head 1. It can be understood that the screw head 1 is provided with a threaded hole, and the injection head 2 is positioned in the threaded hole; the outer wall of the threaded column 31 is in threaded connection with the inner wall of the spiral head 1, so that the sealing area between the injection head 2 and the protective cap 3 is increased, and the sealing performance of the injector is improved.

Further, the end of the threaded column 31 is provided with a blind hole 32, and the injection head 2 is inserted into the blind hole 32, so as to further improve the sealing performance between the injection head 2 and the protective cap 3.

Preferably, the injection head 2 is conical, the blind hole 32 is a tapered hole, and the side wall of the blind hole 32 and the side wall of the injection head 2 form a tapered surface seal, so that the sealing performance of the injection head 2 is further improved, and the medicine in the injector is prevented from contacting with air before use to cause pollution.

Preferably, the connecting ribs 13 are uniformly distributed along the circumferential direction of the fixing ring 12.

Further, a plurality of anti-slip protrusions 33 are arranged on the outer portion of one end of the protective cap 3, which faces the threaded column 31, so as to prevent the protective cap 3 from slipping when the protective cap 3 is opened.

As a specific embodiment of the anti-slip projection, the anti-slip projection 33 is a rib extending along the length direction of the cap 3, so as to facilitate the production and processing of the cap 3. Preferably, the studs 33 are evenly distributed circumferentially around the cap 3.

The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims

1. A pre-encapsulated syringe injection head sealing structure comprises a spiral head (1), an injection head (2) and a protective cap (3), and is characterized in that the spiral head (1) is sleeved outside the injection head (2), the spiral head (1) is in threaded connection with the protective cap (3), and the spiral head (1) and the injection head (2) are both fixedly connected with a needle cylinder (4);

spiral head (1) overcoat is equipped with solid fixed ring (12), gu fixed ring (12) are connected with helmet (3) through a plurality of splice bar (13), splice bar (13) fracture when rotating helmet (3).

2. The pre-filled and sealed syringe injector head sealing structure according to claim 1, characterized in that the screw head (1) is an internally threaded sleeve, and one end of the protective cap (3) is provided with a threaded column (31), and the threaded column (31) is screwed in the screw head (1).

3. The pre-filled and sealed syringe injector head sealing structure according to claim 2, characterized in that the threaded column (31) is provided with a blind hole (32) at the end, and the injector head (2) is inserted in the blind hole (32).

4. The pre-filled and sealed syringe injector head sealing structure according to claim 3, characterized in that the injector head (2) is conical, the blind hole (32) is a tapered hole, and the side wall of the blind hole (32) forms a tapered seal with the side wall of the injector head (2).

5. The pre-filled and sealed syringe injector head sealing structure according to claim 4, characterized in that the connecting ribs (13) are circumferentially distributed uniformly along the fixing ring (12).

6. The sealing structure of the injection head of the pre-filled and sealed syringe as claimed in claim 4, wherein the cap (3) is provided with a plurality of anti-slip protrusions (33) on the outside of the end opposite to the threaded column (31).

7. The pre-filled and sealed syringe tip sealing structure according to claim 6, wherein the anti-slip protrusion (33) is a rib extending along the length of the cap (3).