CN2507474Y - Expendable safety syringe - Google Patents

Abstract

The utility model relates to a disposable safe injector, comprising an injector barrel and a push-pull rod, wherein a buckling device is buckled on the front end of the injector barrel, a needle group is installed on the front end of the buckling device, and a front rubber ring is further sleeved on the buckling device. A buckling head is formed on the front end of the push-pull rod. After the disposable safe injector is used, with the help of a buckle between a groove on the buckling head and a protruding edge of the front rubber ring, the needle group is pulled back into the injector barrel, and the injector is disposed without any damage to careless people. Furthermore, during the procedure of being pulling back, the buckling groove and the protruding edge can be engaged to form a barb-type buckle, which assures the buckling head and the buckling device don't break away easily from each other.

Description

The disposal type safety injector

Technical field

The relevant a kind of disposal type safety injector of this utility model.

Background technology

In recent years, consideration for health, syringe adopts disposal type more, also be that syringe is not reused, with the generation of avoiding infection, tradition disposal type syringe, though can solve syringe reuse the infection problems that may cause, but comparatively speaking, the disposal type syringe but can bring the problem of Biohazard Waste, for medical personnel and Biohazard Waste treatment people etc., depleted syringe is a kind of article of danger, and the syringe that described personnel Chang Yin goes out of use is because of carelessness stabbed, more spreading out of medical personnel in recent years stabs because of the syringe that goes out of use, and infection AIDS, the case of body fluid infections such as hepatitis B (body fluid contact) disease is so for traditional disposal type syringe, it truly has improved necessity.

In order to solve the above problems, the someone has improved traditional disposal type syringe, discloses such as No. 89201289 " safety injector " the novel patent in Taiwan, and this improved disposal type syringe includes an injection tube; One is sticked in the snap fastener of injection tube front end, is formed with hollow chamber in the snap fastener; One can be assembled in the syringe needle group of injection tube front end by snap fastener; One push-pull bar, the push-pull bar front end is provided with a piston, and piston nose is formed with dop, dop can stretch into the hollow chamber of snap fastener, the hollow chamber inwall has block, and by hooking together between the block of the flange of dop and hollow chamber inwall, dop is limited in the hollow chamber.Whereby, after this safety injector injection finished, user can be pulled back push-pull bar, and the interlock snap fastener bounces back in the injection tube with assembling syringe needle group thereon.Like this, the syringe needle group can be concealed in the injection tube, to avoid stabbing casual people.

Though similarly safety injector is enough to solve the safety problem of using the back garbage, following room for improvement is arranged: at first, hooking together between dop flange and snap fastener block is reliable inadequately, and it may break away from the process of pulling back.In addition, after syringe is drawn medicament, medical personnel need the air in the syringe is discharged fully, medicament could be injected in the patient, but aforementioned drawing in the safety injector process, the front end face of push-pull bar piston is to be one plane, residual easily before injection have bubble and be difficult for discharge, medical personnel often need knock injection tube, could make to cause the puzzlement of manipulating by residual bubble exhaustjet tube.

Summary of the invention

A purpose of the present utility model is to provide a kind of disposal type safety injector, and it can guarantee that push-pull bar and syringe needle group do not break away from the process of pulling back, and promptly breaks away from push-pull bar and causes puzzlement in the use to avoid syringe needle not to be retracted into injection tube fully.

Another purpose of the present utility model is to provide a kind of disposal type safety injector, thereby the convenience and the simplified structure that can make things convenient for bubble exhaustjet tube increase successfully to use are convenient to make.

Understand the purpose of this utility model, characteristics and advantage for clearer, preferred embodiment of the present utility model is elaborated below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is an exploded perspective sketch map of the present utility model;

Fig. 2 is a combination schematic perspective view of the present utility model;

Fig. 3 is a combination generalized section of the present utility model;

Fig. 4 is the local enlarged diagram of the injection tube front end of dop draw-in groove of the present utility model when engaging with preceding rubber ring flange;

Fig. 5 be this utility model use the back syringe needle be retracted into fully injection tube and push-pull bar fracture by the time generalized section;

Fig. 6 is the local enlarged diagram of dop of the present utility model, preceding rubber ring, after image cushion rubber and clamping close device.

The specific embodiment

Please refer to shown in Fig. 1 and 2, disposal type safety injector of the present utility model includes:

One injection tube 10, it is the hollow circuit cylinder cylindrical shell of a both ends open, the injection tube 10 1 ends outside is provided with the finger cramp 100 of one, in being provided with the back stopper 102 that is formed with projection on the opening part inwall that refers to cramp 100 1 ends, on the inwall at injection tube 10 nearly end places in addition, be formed with the front block unit 104 of projection again;

One push-pull bar 20, it can have the opening part that refers to cramp 100 1 ends by injection tube 10 and penetrate in the injection tube 10, these push-pull bar 20 shafts have the axially extended fin 22 of multi-disc, and be formed with the dop 28 of one in the end that push-pull bar 20 penetrates injection tube 10, each fin 22 nearly dops 28 place is provided with the groove 24 that shaft is fractureed easily, forms a sleeved part 26 between push-pull bar 20 and dop 28; Dop 28 is the taper that a free end dwindles, offer an annular draw-in groove 29 around the dop 28, the direction that draw-in groove 29 is offered is the free end towards dop 28, draw-in groove 29 has a snap-latch surface 292 and an anticline face 294, please refer to shown in Figure 6ly, snap-latch surface 292 then is the inclined plane that is provided with dop 29 taper free end the same side incline directions perpendicular to dop 29 axis anticline faces 294;

One back rubber ring 30, it can be sheathed on push-pull bar 20 sleeved part 26 so that the leak-stopping function of sealing to be provided;

One clamping close device 40, can be assembled in injection tube 10 and be provided with the end opening inboard in addition that refers to cramp 100, these clamping close device 40 1 ends are formed with a sleeved part 42, end is formed with needle stand 44 in addition, be formed with an annular holddown groove 46 that can match around the clamping close device 40 with injection tube 10 front block units 104, buckle by 104 of holddown groove 46 and injection tube 10 front block units can be snapped in clamping close device 40 this end opening place that injection tube 10 has front block unit 104;

One syringe needle group 50, it includes the entry needle 52 and the needle handle 54 of hollow, is provided with a fixing hole 56 that can be sheathed on the needle stand 44 in the needle handle 54;

Rubber ring 60 before one, it can be sheathed on the sleeved part 42 of clamping close device 40 so that the leak-stopping function of sealing to be provided, be formed with the indent end face 602 of a horn mouth shape on the preceding rubber ring 60, please cooperate with reference to figure 4 and 16, the opposite side of end face 602 then is a bottom surface 603 of pasting mutually with clamping close device 40 when being assembled on the clamping close device 40, end face 602 central authorities are provided with a mesopore 604 that runs through end face 602 and bottom surface 603, and the nearly end face of mesopore 604 inwalls 602 places are provided with a collar flange 606 that 603 directions tilt to extend towards the bottom surface;

Please refer to shown in Fig. 2 and 3, disposal type safety injector of the present utility model needs earlier the mesopore 604 of preceding rubber ring 60 to be sheathed on the sleeved part 42 of clamping close device 40 before using, then clamping close device 40 is assembled in the injection tube 10 together with preceding rubber ring 60, buckle by 104 of the front block units of clamping close device 40 holddown grooves 46 and injection tube 10, and clamping close device 40 is sticked in the opening part that injection tube 10 is provided with front block unit 104 these ends, again back rubber ring 30 is sheathed on push-pull bar 20 sleeved part 26, and dop 28 1 ends of push-pull bar 20 are provided with an end opening place that refers to cramp 100 by injection tube 10 push in the injection tube 10, impose suitable strength simultaneously and make the back stopper 102 of dop 28 by injection tube 10, needle handle 52 with syringe needle group 50 is sheathed on the needle stand 44 of bayonet unit 40 and syringe needle group 50 is assembled in injection tube 10 1 ends by fixing hole 56 again, promptly be state shown in Figure 2, as seen from the figure, when injection tube 10 sucks medicament preparation injection, injection tube 10 can be inverted and make entry needle 52 up, be to be inclined upwardly because of preceding rubber ring 60 end faces 602 this moment, the air bubble that event can make in the medicament and be had upwards floats towards entry needle 52 directions, outside exhaustjet tube 10.

Please refer to shown in Figure 4, when injection finishes, user can further push injection tube 10 with push-pull bar 20, so that the dop 28 of push-pull bar 20 1 ends penetrates in preceding rubber ring 60 mesopores 604, and by the buckle of 606 of the draw-in groove 29 of dop 28 and preceding rubber ring 60 flanges, dop 28 is engaged with bayonet unit 40, pull back push-pull bar 20 this moment, bayonet unit 40 can be pulled back to injection tube 10 together with sheathed syringe needle group 52 thereon, in this pulls back process, dop 28 draw-in grooves 29 become a barb-like buckle state with 606 of preceding rubber ring 60 flanges, can guarantee dop 28 and clamping close device 40 difficult drop-off in the process of pulling back.

Please refer to shown in Figure 5, when pull bar 20 is pulled back to a certain degree the time, dop 28 can be by back stopper 102 blocks, and unlikely being completely pulled out of easily outside the injection tube 10, be provided with groove 24 that shaft easily fractureed because of fin 22 front end places this moment, so user can fracture push-pull bar 20 whereby, so that syringe needle group 50 is concealed in the injection tube 10, avoids stabbing casual people.

As known from the above, disposal type safety injector of the present utility model, it has an injection tube 10 and a push-pull bar 20, injection tube 10 1 end buckles have a clamping close device 40, clamping close device 40 1 ends are assembled with a syringe needle group 50, clamping close device 40 end in addition is formed with a sleeved part 42, rubber ring 60 before being arranged with one on the sleeved part 42, preceding rubber ring 60 has an end face 602 that tilts to be provided with a mesopore 604 and a flange 606 that tilts, push-pull bar 20 front ends are formed with dop 28, be formed with the draw-in groove 29 that matches with flange 606 on the dop 28, when injection finishes, can when push-pull bar 20 is pulled back, syringe needle group 50 be retreated in the injection tube 10, to avoid stabbing casual people by the hooking together of 29 of flange 606 and draw-in grooves, rubber ring 60 is the end face 602 of bell mouth shape before aforementioned again, can before injection, help bubble discharge remaining in the medicament, operate, thereby improve the shortcoming of traditional now disposal type safety injector to make things convenient for medical personnel.

Claims (4)

1. disposal type safety injector includes:

The injection tube of one hollow, injection tube one end is formed with the finger cramp of one, and injection tube has a clamping close device with respect to buckle in the end in addition that refers to cramp, is formed with a sleeved part on the clamping close device and is assembled with a syringe needle group;

One push-pull bar, it can be stretched in the injection tube by the end that refers to cramp that has of injection tube, and push-pull bar one end is provided with a dop, and it is the taper that a free end dwindles, and is arranged with a back rubber ring on the dop, it is characterized in that, also comprises:

Rubber ring before one, it has the end face of the indent of a horn mouth shape, the end face opposite side is one to fit in the bottom surface of clamping close device, end face central authorities are provided with a mesopore that runs through end face and bottom surface, the nearly end face of mesopore inwall place is provided with a flange towards bottom surface direction inclination extension, and wherein preceding rubber ring is sheathed on the sleeved part of bayonet unit by mesopore;

One draw-in groove, it is opened on the dop, and its direction of offering is towards the free end of dop and can be snapped in wherein for the flange of preceding rubber ring.

2. disposal type safety injector as claimed in claim 1 is characterized in that, described preceding rubber ring flange is a cyclic flange.

3. disposal type safety injector as claimed in claim 2 is characterized in that, described dop draw-in groove is one to be formed at the annular groove around the dop.

4. disposal type safety injector as claimed in claim 3 is characterized in that, described dop draw-in groove has a snap-latch surface and an anticline face, and the anticline face is the inclined plane that is provided with dop taper free end the same side incline direction to snap-latch surface perpendicular to the dop axis.

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