CN209967276U

CN209967276U - Safety pre-filled syringe

Info

Publication number: CN209967276U
Application number: CN201920251450.6U
Authority: CN
Inventors: 卢思萍; 葛哲; 李少莹; 彭艳梅
Original assignee: 92nd Hospital Of Joint Logistics Support Force Of Chinese People's Liberation Army
Current assignee: 92nd Hospital Of Joint Logistics Support Force Of Chinese People's Liberation Army
Priority date: 2019-02-28
Filing date: 2019-02-28
Publication date: 2020-01-21
Anticipated expiration: 2029-02-28

Abstract

The utility model relates to the technical field of medical equipment, concretely relates to safe type pre-filling syringe, protective sleeve cover establishes fixed connection between the glass needle tube outside and protective sleeve and the glass needle tube, protective sleeve and syringe needle outside are established to the sheath cover, and the sheath is established including the cover and is established the major diameter sheath, the cover in the protective sleeve outside and establish the minor diameter sheath in the syringe needle rear end outside and the connecting portion of connecting major diameter sheath and minor diameter sheath, major diameter sheath rear end inboard is fixed with many annular elasticity inside latches along major diameter sheath circumference, the protective sleeve front end outside is fixed with the spacing ring along protective sleeve circumference, the protective sleeve outside of spacing ring rear end is fixed with many and elasticity inside latch adaptation's the outer latch of elasticity. The pre-filled syringe avoids liquid medicine loss caused by breakage of the glass needle tube and the injury of medical staff by glass fragments during transportation and use, prevents puncture, is simple and convenient to use, has high safety, and is suitable for first-aid use.

Description

Safety pre-filled syringe

Technical Field

The utility model relates to the technical field of medical equipment, concretely relates to safe type pre-filled syringe.

Background

The prefilled syringe is to pack the liquid medicine into the prefilled syringe directly, unites two into one syringe and liquid medicine packaging container, and the medicine can be stored for a long time, and the syringe needle is installed to the needle tubing front end, and direct injection during the use is simple and convenient. In order to store liquid medicine in the prefilled syringe for a long time, avoid the drug effect to reduce, become invalid even become toxic substance, prefilled syringe adopts glass preparation at present, and glass is fragile article again, glass syringe has probably takes place the breakage when transportation and use, lead to liquid medicine to run off and cut medical staff, and the prefilled syringe on the existing market mostly does not install safety device, the syringe needle of prefilled syringe punctures medical staff easily after the use, increase medical staff's risk of infecting the disease.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the problem that above-mentioned exists, a safe type pre-filled syringe has been designed, the glass needle tubing of this pre-filled syringe is equipped with protective sleeve outward, protective sleeve can protect glass needle tubing, avoid this pre-filled syringe to lead to liquid medicine to run off and glass piece cuts medical staff when transportation and use the glass needle tubing breakage, cover the syringe needle through the slip sheath after finishing using, reach the purpose of preventing stabbing, and is simple and convenient to use, and the security is high, is fit for the first aid and uses.

In order to realize the technical purpose, reach above-mentioned technological effect, the utility model discloses a realize through following technical scheme:

the safety pre-filled syringe comprises a glass needle tube, a needle head, a protective cap, a piston and a push rod, wherein the glass needle tube is a hollow cylinder with an opening at the rear end, the front end of the glass needle tube is fixed with the needle head, the front end of the needle head is sleeved with the protective cap, a sealing rubber plug matched with the needle head is fixed in the protective cap, the piston is connected in the glass needle tube in a sliding manner, the rear end of the piston is connected with the push rod, the glass needle tube is pre-filled with liquid medicine, the safety pre-filled syringe further comprises a protective sleeve and a sheath, the protective sleeve is sleeved on the outer side of the glass needle tube and fixedly connected between the protective sleeve and the glass needle tube, the sheath is sleeved on the outer sides of the protective sleeve and the needle head, the sheath comprises a large-diameter sheath sleeved on the outer side of the protective sleeve, a small-diameter sheath sleeved on the outer, the cross-section of latch is regular triangle in the elasticity, and a right angle limit of regular triangle is fixed at major diameter sheath inboardly, and regular triangle's hypotenuse is towards major diameter sheath front end, the protective sleeve front end outside is fixed with the spacing ring along protective sleeve circumference, the protective sleeve outside of spacing ring rear end is fixed with many and the outer latch of elasticity of the interior latch adaptation of elasticity along protective sleeve circumference, the cross-section of the outer latch of elasticity is regular triangle, and a right angle limit of regular triangle is fixed in the protective sleeve outside, and regular triangle's hypotenuse is towards the protective sleeve rear end, the inside elasticity plug that is fixed with of minor diameter sheath, the through-hole that supplies the syringe needle to pass is seted up at elasticity plug middle part.

Furthermore, the outer sides of the protective cap and the protective sleeve are both provided with anti-skid convex lines.

Furthermore, when the elastic inner latch at the rear end of the large-diameter sheath is meshed with the elastic outer latch at the front end of the protective sleeve, the needle head is completely positioned in the sheath.

Furthermore, the glass syringe is made of colorless transparent glass, the protective sleeve is made of colorless transparent medical PVC, and the sheath is made of high polymer polypropylene.

Furthermore, a breaking notch is formed in the position, close to the piston, of the push rod.

The utility model has the advantages that: the protective sleeve is arranged outside the glass needle tube of the prefilled syringe and can protect the glass needle tube, so that the phenomenon that the glass needle tube is broken to cause liquid medicine loss and glass fragments cut medical staff when the prefilled syringe is transported and used is avoided; the sheath slides forwards along the protective sleeve after use, the elastic inner latch on the inner side of the rear end of the sheath is mutually clamped with the elastic outer latch on the outer side of the front end of the protective sleeve, the limiting ring prevents the rear end of the sheath from slipping from the front end of the protective sleeve, when the elastic inner latch is clamped with the elastic outer latch, the sheath cannot slide backwards, the condition that the medical staff touches the front end of the sheath, the sheath slides backwards to cause the needle head to leak and stab the medical staff is avoided, the front end of the sheath is a small-diameter sheath sleeved on the outer wall of the needle head, an elastic rubber plug is fixed in the small-diameter sheath, a through hole for the needle head to pass through is formed in the elastic rubber plug, when the sheath slides to the front end of the protective sleeve, the needle head is completely positioned in the sheath, meanwhile, the through hole on the elastic rubber plug is closed under the elastic action, and the condition that the skin entering the small-diameter sheath is, the safety is high, and the device is suitable for emergency treatment; after the elastic inner latch and the elastic outer latch are clamped, the sheath cannot slide backwards, and the push rod is provided with a notch close to the piston, so that secondary use of the injector can be avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic diagram of the overall structure of a safety pre-filled syringe;

FIG. 2 is a schematic view of the construction of the sheath;

FIG. 3 is a schematic view of the engagement between the inner resilient latch and the outer resilient latch;

FIG. 4 is an enlarged view of the structure of FIG. 1 at A;

fig. 5 is an enlarged view of the structure at B of fig. 1.

In the drawings, the components represented by the respective reference numerals are listed below:

1-glass needle tube, 11-needle head, 2-protective sleeve, 21-elastic outer latch, 22-limit ring, 3-sheath, 31-large diameter sheath, 311-elastic inner latch, 32-small diameter sheath, 321-elastic rubber plug, 33-connecting part, 4-piston, 5-push rod, 51-break notch and 6-protective cap.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

Referring to fig. 1-5, the safety pre-filled syringe comprises a glass needle tube 1, a needle 11, a protective cap 6, a piston 4 and a push rod 5, wherein the glass needle tube 1 is a hollow cylinder with an opening at the rear end, the needle 11 is fixed at the front end of the glass needle tube 1, the protective cap 6 is sleeved at the front end of the needle 11, a sealing rubber plug matched with the needle 11 is fixed in the protective cap 6, the piston 4 is connected in the glass needle tube 1 in a sliding manner, the push rod 5 is connected at the rear end of the piston 4, the glass needle tube 1 is pre-filled with liquid medicine, the safety pre-filled syringe further comprises a protective sleeve 2 and a sheath 3, the protective sleeve 2 is sleeved at the outer side of the glass needle tube 1, the protective sleeve 2 is fixedly connected with the glass needle tube 1, the sheath 3 is sleeved at the outer sides of the protective sleeve 2 and the needle 11, the sheath 3 comprises a large-diameter sheath 31 sleeved at the outer side of the, a plurality of annular elastic inner latch teeth 311 are fixed on the inner side of the rear end of the large-diameter sheath 31 along the circumferential direction of the large-diameter sheath 31, the section of the elastic inner latch 311 is a regular triangle, one right-angle side of the regular triangle is fixed at the inner side of the large-diameter sheath 31, the inclined side of the regular triangle faces the front end of the large-diameter sheath 31, a limiting ring 22 is fixed on the outer side of the front end of the protective sleeve 2 along the circumferential direction of the protective sleeve 2, a plurality of elastic outer latch teeth 21 matched with the elastic inner latch teeth 311 are fixed on the outer side of the protective sleeve 2 at the rear end of the limiting ring 22 along the circumferential direction of the protective sleeve 2, the section of the elastic outer latch 21 is a regular triangle, one right-angle side of the regular triangle is fixed at the outer side of the protective sleeve 2, the inclined side of the regular triangle faces the rear end of the protective sleeve 2, an elastic rubber plug 321 is fixed inside the small-diameter sheath 32, and a through hole for the needle 11 to pass through is formed in the middle of the elastic rubber plug 321.

Wherein, the protective cap 6 and the sheath 3 outside all are equipped with anti-skidding burr, make things convenient for medical staff to take off the protective cap 6 and slide sheath 3 on the protective sleeve 2 from syringe needle 11 front end.

When the elastic inner latch 311 at the rear end of the large-diameter sheath 31 is engaged with the elastic outer latch 21 at the front end of the protective sleeve 2, the needle 11 is fully positioned inside the sheath 3.

Wherein, glass cylinder 1 adopts colorless transparent glass to make and forms, protective sleeve 2 adopts colorless transparent medical PVC to make and forms, sheath 3 adopts the preparation of polymer polypropylene to form, and glass cylinder 1, protective sleeve 2 and sheath 3 all adopt transparent material to make, make things convenient for medical staff to observe the inside liquid medicine capacity of syringe.

Wherein, the push rod 5 is provided with a break gap 51 near the piston 4, after the liquid medicine is injected, the push rod 5 is pulled to ensure that the break gap 51 is positioned at the opening at the rear end of the glass needle cylinder 1, and the push rod 5 is bent to ensure that the push rod is broken at the break gap 51, thereby avoiding the secondary use of the injector.

One specific application of this embodiment is: the glass needle tube 1 of the prefilled syringe is externally provided with a protective sleeve 2, the protective sleeve 2 can protect the glass needle tube 11, the prefilled syringe is prevented from being damaged by liquid medicine loss and glass fragments from cutting medical staff when being transported and used, when the prefilled syringe is used, a protective cap 6 is taken down from the front end of the needle 11, the needle 11 is penetrated into a sterilized injection part, a piston 4 is pushed by a push rod 5 for injection, after the injection is completed, a sheath 3 is pushed forwards along the protective sleeve 2, when the 'click' sound is heard, an elastic inner clamping tooth 311 on the inner side of the rear end of a large-diameter sheath 31 is clamped with an elastic outer clamping tooth 21 on the outer side of the front end of the protective sleeve 2, a limiting ring 22 is fixed on the outer side of the front end of the protective sleeve 2, the limiting ring 22 can prevent the rear end of the sheath 3 from slipping from the front end of the protective sleeve 2, and when the elastic inner clamping tooth 311 is clamped with the elastic, the sheath 3 can not slide backwards, the medical staff can be prevented from being punctured by the needle 11 leaking outwards due to the fact that the sheath 3 slides backwards when touching the front end of the sheath 3, the front end of the sheath 3 is a small-diameter sheath 32 sleeved on the outer wall of the needle 11, an elastic rubber plug 321 is fixed in the small-diameter sheath 32, a through hole for the needle 11 to pass through is formed in the elastic rubber plug 321, when the sheath 3 slides to the front end of the protective sleeve 2, the needle 11 is completely positioned in the sheath 3, meanwhile, the through hole in the elastic rubber plug 321 is closed under the elastic action, the skin entering the small-diameter sheath 32 is prevented from being punctured by the needle 11 when the medical staff touches the front end of the small-diameter sheath 32, the push rod 5 is pulled backwards to enable the fracture notch 51 on the push rod 5 to be positioned at the opening at the rear end of the glass needle cylinder 1, then the push rod 5 is bent to enable the push rod, high safety and is suitable for emergency treatment.

In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, to thereby enable others skilled in the art to best understand the invention for and utilize the invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. Safety type pre-filling syringe, including glass needle tubing, syringe needle, helmet, piston and push rod, the glass needle tubing is equipped with open-ended hollow cylinder for the rear end, and glass needle tubing front end is fixed with the syringe needle, and the syringe needle front end cover is equipped with the helmet, and the helmet internal fixation has the sealed plug with the syringe needle adaptation, and sliding connection has the piston in the glass needle tubing, and the piston rear end is connected with the push rod, it has liquid medicine, its characterized in that to fill in advance in the glass needle tubing: the needle protection sleeve comprises a glass needle tube and is characterized by further comprising a protection sleeve and a sheath, wherein the protection sleeve is sleeved on the outer side of the glass needle tube, the protection sleeve is fixedly connected with the glass needle tube, the sheath is sleeved on the outer sides of the protection sleeve and the needle head, the sheath comprises a large-diameter sheath sleeved on the outer side of the protection sleeve, a small-diameter sheath sleeved on the outer side of the rear end of the needle head and a connecting part for connecting the large-diameter sheath and the small-diameter sheath, a plurality of annular elastic inner clamping teeth are fixed on the inner side of the rear end of the large-diameter sheath along the circumferential direction of the large-diameter sheath, the cross section of each elastic inner clamping tooth is a regular triangle, one right-angle side of each regular triangle is fixed on the inner side of the large-diameter sheath, the inclined side of each regular triangle faces the front end of the large-diameter sheath, a limiting ring is fixed on, the cross-section of the elastic outer latch is a regular triangle, a right-angle side of the regular triangle is fixed on the outer side of the protective sleeve, the inclined side of the regular triangle faces the rear end of the protective sleeve, an elastic rubber plug is fixed inside the small-diameter sheath, and a through hole for the needle head to pass through is formed in the middle of the elastic rubber plug.

2. A safety pre-filled syringe according to claim 1 wherein: the outer sides of the protective cap and the protective sleeve are both provided with anti-skid convex lines.

3. A safety pre-filled syringe according to claim 2, in which: when the elastic inner clamping teeth at the rear end of the large-diameter sheath are meshed with the elastic outer clamping teeth at the front end of the protective sleeve, the needle head is completely positioned in the sheath.

4. A safety pre-filled syringe according to claim 1 wherein: the glass needle tube is made of colorless transparent glass, the protective sleeve is made of colorless transparent medical PVC, and the sheath is made of high polymer polypropylene.

5. A safety pre-filled syringe according to claim 4 in which: and a breaking notch is formed at the position, close to the piston, of the push rod.