CN209490329U

CN209490329U - Disposable syringe

Info

Publication number: CN209490329U
Application number: CN201821704393.4U
Authority: CN
Inventors: 石琰
Original assignee: Individual
Current assignee: Individual
Priority date: 2018-10-19
Filing date: 2018-10-19
Publication date: 2019-10-15
Anticipated expiration: 2028-10-19

Abstract

The utility model discloses a kind of disposable syringes, it include: needle mouth, injection tube, rubber stopper and injection rod, injection tube front end is installed with needle mouth, injection tube rear end is installed with holding handle, injection tube front end internal chamber wall is provided with annular protrusion, it injects tube inner chamber and is equipped with injection rod and rubber stopper, injection rod front end is equipped with rubber stopper, injection rod rear end is installed with push handle, the front end of rubber stopper is provided with tapered guide surface, the tapered guide surface rear portion of rubber stopper is provided with annular groove corresponding with annular protrusion, the limit block piece that restricted injection rod is pushed to the front end of injection tube is set between push handle and holding handle, the height for limiting block piece is greater than the annular protrusion front end of injection tube internal chamber wall to the distance of injection tube front end internal chamber wall.The utility model can effectively prevent disposable syringe disposable syringe caused by use is preceding due to outer active force pushes injection rod or has pressed injection rod because of maloperation and scrap, and avoid waste.

Description

Disposable syringe

Technical field

The utility model relates to the field of medical instrument technology more particularly to a kind of disposable syringes.

Background technique

In clinic, carrying out treatment disease using injection system is a kind of very universal medical mode, in injection process Middle syringe is important injection tool.To prevent cross-infection, people have invented disposable syringe, but traditional disposable Syringe does not have self-destroying function, and used disposable syringe is easy illegally to be recycled by illegal retailer, causes to reuse The phenomenon that, bring security risk.

People have invented a variety of disposable syringes for preventing from reusing in order to solve this problem, as notification number is The Chinese utility model patent of CN201987982U discloses a kind of disposable needle tubing, which includes needle tubing, push rod And stopper head, push rod upper end are connected by thin connecting column with stopper head, there is up-small and down-big male cone (strobilus masculinus) in stopper head upper end, outside There is annular groove below conical surface big end；There is annular convex platform in needle tubing upper end, boss aperture surface has up big and down small inner conical surface.Work as note It penetrates when should be complete, that is, when stopper head should arrive needle tubing bottom, the male cone (strobilus masculinus) of stopper head pushes forward along the inner cone of boss, It is finally stuck in boss in stopper head annular groove, retreat push rod can not, retreating push rod by force can be such that thin connecting column breaks, Stopper head is caused to be detached from push rod, thus can the effective the secondary use for preventing needle tubing.

Notification number is that the Chinese patent of CN205108582U discloses a kind of self-destructed disposable syringe, it includes needle Mouth, injection tube, rubber stopper and injection rod；The needle mouth is fixed on injection tube front end, injection rod front end by setting block with Rubber stopper is connected, and block is arranged inside rubber stopper；The block front end is provided with the head to match with needle mouth inner hole, gear Block and head junction be arranged the first V-groove and form the first easy breakpoint, is provided in the needle mouth and is limited to head Fixed mechanism；It is provided with the second V-groove on the injection rod and forms the second easy breakpoint.This self-destructed disposable syringe is logical The first easy breakpoint of setting and the second easy breakpoint are crossed, on completion of an injection, by fixing first easy breakpoint one end, torsion first is easily The breakpoint other end stays in piston and a part of injection rod in syringe, breaks the disconnected second easy breakpoint by manpower, realizes self-destruction.

Above-mentioned two patent can realize the secondary use for avoiding syringe, but easily generate using preceding written-off existing As.Main reason is that: outer effect inevitably occurs in packaging, transport and seal off above-mentioned one injection device during Situation that power is applied on the injection rod of syringe or user easily cause injection rod because maloperation has pressed injection rod It is disposable that band piston is pushed into the completion of needle tubing bottom.

Utility model content

To overcome above-mentioned the deficiencies in the prior art, the technical problem to be solved by the utility model is to provide a kind of disposable Syringe, to prevent disposable syringe before using with regard to written-off phenomenon.

To solve the above problems, the utility model uses following technical scheme:

A kind of disposable syringe, comprising: needle mouth, injection tube, rubber stopper and injection rod, the injection tube front end are installed with Needle mouth, the injection tube rear end are installed with holding handle, and injection tube front end internal chamber wall is provided with annular protrusion, the injection Tube inner chamber is equipped with the injection rod and the rubber stopper, and the injection rod front end is equipped with the rubber stopper, the injection rod rear end It is installed with push handle, the front end of the rubber stopper is provided with tapered guide surface, and the tapered guide surface rear portion of the rubber stopper is provided with Annular groove corresponding with the annular protrusion, which is characterized in that

The restricted injection rod is arranged between the push handle and the holding handle to push to the front end of the injection tube Limit block piece, it is described limit block piece height be greater than the injection tube internal chamber wall annular protrusion front end to the injection tube before Hold the distance of internal chamber wall.

Preferably, the limit block piece is set as cylindrical body, and one end of the limit block piece is fixed at the push handle Front end, the other end extend to the rear end of the holding handle.

Preferably, the limit block piece is set as cuboid, and one end of the limit block piece is fixed at the clamping The rear end of handle, the other end extend to the push handle front end.

Preferably, the limit block piece is set as the sleeve of circumferential openings, and the sleeve is set on the injection rod.

Preferably, drawing head is set at the circumferential openings of the sleeve.

After adopting the above technical scheme, the beneficial effects of the utility model are:

It can effectively prevent disposable syringe pushing injection rod because of outer active force before or pressing because of maloperation Injection rod and caused by disposable syringe scrap, avoid waste.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of the utility model disposable syringe embodiment one；

The structural schematic diagram of broken section when Fig. 2 is the utility model disposable syringe unused state；

Fig. 3 be the utility model disposable syringe use state when broken section structural schematic diagram；

The structural schematic diagram of Fig. 4 the utility model disposable syringe embodiment two；

Fig. 5 is the enlarged structure schematic diagram of the sleeve of circumferential openings in Fig. 4；

Fig. 6 is the schematic cross-sectional view in Fig. 5 at A-A；

In figure: 10- injection tube, 101- needle mouth, 102- holding handle, 103- annular protrusion, 13- injection rod, 14- push handle, 15- cylindrical body, 16- rubber stopper, 161- annular groove, 162- tapered guide surface, the sleeve of 17- circumferential openings, 171- drawing head, Distance of the annular protrusion front end of H1- injection tube internal chamber wall to injection tube front end internal chamber wall, H2- cylinder height, H3- are circumferentially opened The sleeve height of mouth.

Specific embodiment

Utility model will be further described in detail below with reference to the attached drawings and specific embodiments.

For ease of understanding, the utility model makees following regulation: the direction that injection rod promotes when injection is " preceding ", in contrast Be reversed " rear ".

Embodiment 1:

Disposable syringe as shown in Figures 1 to 4,10 front end of injection tube are installed with needle mouth 101,101 rear end of injection tube It is installed with holding handle 102,10 front end internal chamber wall of injection tube is provided with annular protrusion 15, and 10 inner cavity of injection tube is equipped with injection rod 13 With rubber stopper 16,13 front end of injection rod is equipped with rubber stopper 16, and 13 rear end of injection rod is installed with push handle 14, and the front end of rubber stopper 16 is set It is equipped with tapered guide surface 162, it is recessed that 162 rear portion of tapered guide surface of rubber stopper 16 is provided with annular corresponding with annular protrusion 103 The limiting block that restricted injection rod 13 is pushed to the front end of injection tube 10 is arranged in slot 161 between push handle 14 and holding handle 102 Part, limit block piece height be greater than injection tube internal chamber wall annular protrusion front end to injection tube front end internal chamber wall distance H1.

Specifically, when limit block piece is set as cylindrical body 15, as shown in Figure 1, one end fixed setting of limit block piece 15 In 14 front end of push handle, the other end extends to the rear end of the holding handle.

Cylindrical body 15 is dismantled when disposable syringe to be easy to use, one end of the cylindrical body fixed with push handle 14 is set For tip.

Alternatively, limit block piece is set as cuboid, the one end for limiting block piece is fixed at the rear end of holding handle 102, The other end extends to the push handle front end.

Embodiment 2:

As shown in Figures 4 to 6, the present embodiment 2 and the structure of embodiment 1 are essentially identical, the difference is that, limit block piece It is set as the sleeve 17 of circumferential openings, the sleeve 17 of circumferential openings is set on injection rod 13.To be easy to use disposable injection The sleeve of circumferential openings 17 is removed when device, drawing head 171 is set at circumferential openings.

The application method of the utility model disposable syringe:

When using disposable syringe, syringe needle is mounted on needle mouth 101, shape is not used in syringe shown in Fig. 2 (rubber stopper 16 and injection rod 13 are in initial position), which starts extraction medical fluid, under state will limit block piece after syringe extracts medical fluid (sleeve 17 of the cylindrical body 15 in Fig. 1 or the circumferential openings in Fig. 4) removes, and then makes the exhaustjet upward of needle mouth 101 Air in cylinder 10, after the completion of patient's injection, syringe is in disposable syringe as shown in Figure 3 use state (note Penetrate bar 13 and rubber stopper 16 be in the front end of injection tube inner chamber), at this moment if to retreat injection rod 13, injection rod by force 13 are pulled off or cause stopper head to be detached from injection rod, prevent the secondary use of disposable syringe.

The utility model effectively prevent disposable syringe using it is preceding because outer active force push injection rod or because The problem of disposable syringe caused by injection rod is scrapped has been pressed for maloperation, has avoided waste.

The technical solution of the utility model is explained in detail above in conjunction with attached drawing, but the utility model is not limited to Above-described embodiment, it will be appreciated by those skilled in the art that the various changes made in the form and details to it are equal It falls in protection scope defined by the utility model claims book.

Claims

1. a kind of disposable syringe, comprising: needle mouth, injection tube, rubber stopper and injection rod, the injection tube front end are installed with needle Mouth, the injection tube rear end are installed with holding handle, and injection tube front end internal chamber wall is provided with annular protrusion, the injection tube Inner cavity is equipped with the injection rod and the rubber stopper, and the injection rod front end is equipped with the rubber stopper, and the injection rod rear end is solid Equipped with push handle, the front end of the rubber stopper is provided with tapered guide surface, the tapered guide surface rear portion of the rubber stopper be provided with The corresponding annular groove of annular protrusion, which is characterized in that

The limit that the restricted injection rod is pushed to the front end of the injection tube is set between the push handle and the holding handle The height of position block piece, the limit block piece is greater than in the annular protrusion front end to the injection tube front end of the injection tube internal chamber wall The distance of cavity wall.

2. disposable syringe according to claim 1, which is characterized in that the limit block piece is set as cylindrical body, institute The one end for stating limit block piece is fixed at the push handle front end, and the other end extends to the rear end of the holding handle.

3. disposable syringe according to claim 2, which is characterized in that the limit block piece is set as cuboid, institute The one end for stating limit block piece is fixed at the rear end of the holding handle, and the other end extends to the push handle front end.

4. disposable syringe according to claim 1, which is characterized in that the limit block piece is set as circumferential openings Sleeve, the sleeve are set on the injection rod.

5. disposable syringe according to claim 4, which is characterized in that drawing is arranged at the circumferential openings of the sleeve Head.