CN114129822A

CN114129822A - Pull-back syringe

Info

Publication number: CN114129822A
Application number: CN202111471175.7A
Authority: CN
Inventors: 车林杰; 郑大田; 刘青山; 田耀能
Original assignee: Hunan Pingan Medical Devices Technology Co ltd
Current assignee: Hunan Pingan Medical Devices Technology Co ltd
Priority date: 2021-12-03
Filing date: 2021-12-03
Publication date: 2022-03-04

Abstract

The invention discloses a pull-back type injector, belonging to the field of medical instruments, comprising: the needle base, the needle base fixing buckle, the core rod and the outer sleeve; the fixed knot joint of needle file is in the hole of the head end of overcoat, the fixed knot tail end of detaining of needle file sets up elasticity rifle tooth, the needle file passes the head end of overcoat is inserted in the fixed knot of needle file quilt elasticity rifle tooth supports, the core bar is in sliding connection in the overcoat, the head end of core bar has set gradually deformation recess, tooth and cylinder, deformation recess with the tooth joint is in the needle file, the cylinder head end struts elasticity rifle tooth supports the needle file. The invention has simple structure, can realize the disposable pull-back type injector through the clamping relation of the top end of the core rod, the needle seat and the needle seat fixing buckle, and simultaneously protects medical care personnel after the injector is used.

Description

Pull-back syringe

Technical Field

The invention relates to the field of medical instruments, in particular to a pull-back type injector.

Background

With the improvement of living standard, the safety and sanitary standard of medical treatment and sanitation are higher and higher, the syringe is a common medical apparatus, and lawless persons can simply clean and pack the syringe after recovering the disposable syringe and flow to the market again, thereby greatly influencing the personal of patients; but also the medical staff is often stabbed by the used apparatus, which causes the medical staff to be infected by the virus and bacteria on the patient.

Disclosure of Invention

In view of the above, the present invention provides a retractable syringe to ensure the disposable use of the syringe and protect medical staff from being pricked by the used syringe.

In order to achieve the purpose, the invention adopts the following technical scheme:

a pull-back syringe comprising: the needle base, the needle base fixing buckle, the core rod and the outer sleeve; the fixed knot joint of needle file is in the hole of the head end of overcoat, the fixed knot tail end of detaining of needle file sets up elasticity rifle tooth, the needle file passes the head end of overcoat is inserted in the fixed knot of needle file quilt elasticity rifle tooth supports, the core bar is in sliding connection in the overcoat, the head end of core bar has set gradually deformation recess, tooth and cylinder, deformation recess with the tooth joint is in the needle file, the cylinder head end struts elasticity rifle tooth supports the needle file.

Furthermore, the needle seat fixing buckle is provided with a protruding rib, a concave ring is arranged at the inner hole at the upper end of the head end of the outer sleeve, and the needle seat fixing buckle is clamped in the concave ring through the protruding rib and fixed in the inner hole at the head end of the outer sleeve.

Furthermore, the needle holder further comprises a sheath and a needle tube, wherein the needle tube is fixedly arranged in the needle holder, and the sheath is arranged at the head end of the outer sleeve and covers the needle tube.

Furthermore, the needle holder fixing buckle further comprises a sealing element, wherein the sealing element is installed between the needle holder and the head end of the outer sleeve and is pressed in the outer sleeve by the head end face of the needle holder fixing buckle.

Further, the rubber plug is arranged on the core bar and is connected with the outer sleeve in a sliding manner.

Furthermore, a weakening structure is arranged on the core rod.

The invention has the beneficial effects that:

according to the invention, through the clamping relation among the top end of the core rod, the needle seat and the needle seat fixing buckle, the core rod can be broken after the core rod is pulled back, and the product is self-destructed, so that the disposable use is realized; the needle tube enters the inside of the outer sleeve, and medical care personnel can be protected from being punctured by the used needle tube.

Drawings

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

Fig. 1 is a schematic structural view of a pull-back syringe.

Fig. 2 is an enlarged view of fig. 1.

Fig. 3 is a schematic view showing the structure of the retractable syringe in use.

Fig. 4 is an enlarged view of fig. 3.

Fig. 5 is a self-destruction schematic view of the pull-back syringe.

Wherein, in the figure:

1-sheath, 2-needle tube, 3-needle base, 4-sealing element, 5-needle base fixing buckle, 6-rubber plug, 7-core bar, 8-outer sleeve, 9-inner clamping ring, 10-concave ring, 11-elastic gun tooth, 12-deformation groove, 13-tooth, 14-cylinder and 15-weakening structure.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1 to 5, a pull-back syringe includes: the needle base 3, the needle base fixing buckle 5, the core bar 7 and the outer sleeve 8; the 5 joints of needle file stationary dog are in the hole of the head end of

overcoat

8, 5 tail ends of the needle file stationary dog set up elasticity rifle tooth 11, needle file 3 passes the head end of overcoat 8 and inserts in the needle file stationary dog 5 by elasticity rifle tooth 11 and support, what two elasticity rifle teeth 11 firmly blocked needle file 3 and does not roll back, core bar 7 sliding connection in overcoat 8, the head end of core bar 7 has set gradually deformation recess 12, tooth 13 and cylinder 14, core bar 7 slides to the head end in overcoat 8, can be so that deformation recess 12 and tooth 13 joint are in needle file 3, cylinder 14 head end struts elasticity rifle tooth 11 and supports needle file 3, core bar 7 is as an organic whole with the cassette kayser.

The needle seat fixing buckle 5 is provided with a convex rib, the inner hole at the upper end of the head end of the outer sleeve 8 is provided with a concave ring 10, the needle seat fixing buckle 5 is clamped in the concave ring 10 through the convex rib to be fixed in the inner hole at the head end of the outer sleeve 8, and the needle seat fixing buckle 5 is fixedly arranged on the outer sleeve 8.

The needle tube 2 is fixedly arranged in the needle base 3, the sheath 1 is arranged at the head end of the outer sleeve 8 to cover the needle tube 2, and the sheath 1 protects the needle tube 2 from being damaged or polluted before use and also protects medical personnel from being pricked before use.

Sealing member 4 is installed between needle file 3 and the 8 head ends of overcoat, is pressed in overcoat 8 by the fixed knot of needle file 5 head end terminal surface, and sealing member 4 plays sealed effect, prevents that the clearance on liquid medicine meeting overcoat 8 top from spilling when the injection.

The rubber plug 6 is arranged on the core bar 7 and is connected with the outer sleeve 8 in a sliding way, and the rubber plug 6 at the upper end of the core bar 7 also plays a sealing role to push the liquid medicine to enter the body of a patient through the needle tube 2, so that the liquid medicine is prevented from leaking from the tail end of the outer sleeve 8.

The core rod 7 is provided with the weakening structure 15, and after the use is finished, the core rod 7 is pulled back and broken off from the weakening structure 15, so that the syringe can not be used again.

Examples

The sheath 1 is pulled out from the top end of the outer sleeve 8, then the core rod 7 is pulled to suck the liquid medicine into the outer sleeve 8 through the needle tube 2, during injection, the core rod 7 is pushed, the cylinder 14 at the upper end of the core rod 7 props up the two elastic gun teeth 11 of the needle base fixing buckle 5, the rubber plug 6 touches the bottom of the inner cavity of the outer sleeve 8, meanwhile, the deformation grooves 12 at the two sides of the sharp part of the core rod 7 deform, teeth 13 easily enter the inner clamping ring 9 of the needle base 3, the core rod 7 and the needle base 3 are locked into a whole, the self-destruction function is activated, and the needle base 3 enters the inner cavity of the outer sleeve 8 along with the core rod 7 when the core rod 7 is pulled back.

Example 2

After the needle seat 3 enters the inner cavity of the outer sleeve 8 along with the core rod 7 when the core rod 7 is pulled back, the core rod 7 is continuously pulled until the weakening structure 15 of the core rod 7 is flush with the tail end port of the outer sleeve 8, the core rod 7 is broken off from the weakening structure 15, and the product is completely self-destructed.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A pull-back syringe, comprising: the needle base, the needle base fixing buckle, the core rod and the outer sleeve; the fixed knot joint of needle file is in the hole of the head end of overcoat, the fixed knot tail end of detaining of needle file sets up elasticity rifle tooth, the needle file passes the head end of overcoat is inserted in the fixed knot of needle file quilt elasticity rifle tooth supports, the core bar is in sliding connection in the overcoat, the head end of core bar has set gradually deformation recess, tooth and cylinder, deformation recess with the tooth joint is in the needle file, the cylinder head end struts elasticity rifle tooth supports the needle file.

2. The retractable syringe as claimed in claim 1, wherein the needle holder fastener is provided with a protruding rib, the inner hole at the upper end of the head end of the outer sleeve is provided with a concave ring, and the needle holder fastener is fixed in the inner hole at the head end of the outer sleeve by the protruding rib being engaged with the concave ring.

3. The retractable syringe as claimed in claim 1, further comprising a sheath and a needle tube, wherein the needle tube is fixedly mounted in the needle holder, and the sheath is mounted at the head end of the outer sleeve to cover the needle tube.

4. The retractable syringe as claimed in claim 1, further comprising a sealing member, wherein the sealing member is mounted between the needle holder and the head end of the outer sleeve, and is pressed in the outer sleeve by the head end face of the needle holder retaining buckle.

5. The pull-back syringe as claimed in claim 1, further comprising a rubber plug mounted on the core rod and slidably connected to the outer sheath.

6. The retractable syringe as claimed in claim 1, wherein the core rod is provided with a weakening structure.