CN201030117Y

CN201030117Y - Disposable rotating destroying injection syringe

Info

Publication number: CN201030117Y
Application number: CNU2007201192019U
Authority: CN
Inventors: 洪正龙
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-03-28
Filing date: 2007-03-28
Publication date: 2008-03-05
Anticipated expiration: 2017-03-28

Abstract

A disposable rotating destroying injector comprises a needle head, a syringe, a push rod, and a piston head, which is characterized in that the piston head is fixed on a piston head shelf, the lower end of the piston head shelf is buckled at the upper portion of the push rod, and a knob which can rotate with the push rod and can support the piston head shelf is arranged between the piston head shelf and the push rod. After the syringe is used, the push rod and the piston can be completely separated only to rotate the push rod to the largest angle, and the piston is fastened in the syringe. The utility model has the advantages of simple structure, convenient and quick operation, and is applicable to a disposable injector.

Description

Syringe is destroyed in disposable rotation

Technical field

This utility model relates to disposable syringe, refers in particular to reach the rotation destruction syringe of destroying purpose a kind of the separation with piston by push rod.

Background technology

Use disposable syringe all to bring great convenience for doctor and patient, safety also must be in guarantee, but some illegal figure that are greedy for small gains may reclaim used disposable syringe and recycle after simple sterilization, have brought very big hidden danger to user.Disposable syringe commonly used comprises syringe, is fixed with syringe needle on the syringe, is the fixed piston of push rod and push rod end in the syringe, and it is not easy that this syringe wants to damage conveniently yet, chance is provided for recycling of syringe.Also there are some to use the once syringe of back auto-destruct in the market, but the cost of manufacture height that has, and the destruction inconvenient operation that has has suppressed applying of destruction property syringe.Still do not have at present a kind of by reaching push rod and separating of piston the structure of destroying syringe.

The utility model content

This utility model is intended to address the above problem, and provides a kind of disposable rotation to destroy syringe.

Syringe is destroyed in this disposable rotation, comprise syringe needle, syringe, push rod and piston head, it is characterized in that: described piston head is fixed on the piston headstock, piston headstock lower end snaps onto the top of push rod, go back the knob that neither one can rotate and strut the piston headstock with push rod between the piston headstock and push rod, the sole that is strutted is stuck in the syringe inwall, and push rod breaks away from piston head, can not drop-down piston, reach the purpose of scrapping.

The described piston headstock comprises a push pedal that adapts with the syringe internal diameter, push pedal is provided with one and the corresponding boss in syringe top, vertically be provided with two parallel soles under the push pedal, both sides, sole bottom inwardly are provided with the hook of projection, and the middle part in the sole also is provided with projection.

Described knob is a cylinder, be provided with a limited post above it, corresponding with this limited post, be provided with groove on the push pedal of the piston headstock and boss, limited post rotatably inserts in the groove, and knob is provided with quadrate detent in the middle of the bottom, be provided with to knob sidewall lateral symmetry helical groove, and the degree of depth of helical groove shoals gradually along with helix descends, and is provided with the darker draw-in groove of the degree of depth at helical groove lower end destination county, and the interior projection of above-described helical groove and draw-in groove and sole is corresponding.

Described draw-in groove extends vertically downward, and development length is H5, and the intensification gradually from top to bottom of the degree of depth of draw-in groove, forms a slope, when projection sinks into will to be fixed therein firmly in this draw-in groove, can not reset again.

The angle of the helical groove rotation of described knob sidewall both sides is 180 degree or 90 degree, and the wide-angle rotation is relatively laborsaving.

Described push rod shaft is wider than the distance of two soles, and the push rod top is provided with a platform, and the square detent of corresponding knob bottom is provided with bumping square on the platform, the hook of sole is limited to platform in the sole, when promptly rotating, the push rod upper-lower position is motionless relatively, has only knob rising.

The height H 7 that the height H 6 of described bumping square is risen when rotating maximum angle greater than knob, and H6＜H7+H5.

The following beneficial effect of this utility model tool:

1, only needs rotation push rod 180 degree or 90 degree, can realize the disengaging fully of the push rod and the piston headstock, reach the purpose that syringe is scrapped.

2, simple to operate, quick.

Description of drawings

Fig. 1 is the piston headstock, knob and push rod package assembly sketch map.

Fig. 2 is the rotation status structural representation.

Fig. 3 is a piston head shelf structure sketch map, and wherein Fig. 3 A is a front view, and Fig. 3 B is a upward view, and Fig. 3 C is an axonometric chart.

Fig. 4 is the knob structure sketch map, and wherein Fig. 4 A is a front view, and Fig. 4 B is a right view, and Fig. 4 C looks up structural representation.

Fig. 5 is the pusher structure sketch map.

The specific embodiment

Below in conjunction with accompanying drawing this utility model is further described.

It is identical with existing syringe that syringe is destroyed in this disposable rotation, comprise syringe needle, syringe, push rod and piston head, piston head is fixed on the piston headstock of push rod upper end, because architecture advances of the present utility model is primarily aimed at the connecting portion of push rod and piston head, omit the sketch map of syringe and syringe needle here.As shown in Figure 1, the piston headstock 10 lower ends snap onto the top of push rod 30, also are provided with a knob 20 that can rotate and strut the piston headstock with push rod at the

piston headstock

10 and 30 of push rods.Fig. 2 illustrates the situation that the piston headstock 10 is strutted, and will specify each parts in conjunction with each respective drawings simultaneously below.

As Fig. 3 A to shown in the 3C, the piston headstock 10 comprises a push pedal 11 that adapts with the syringe internal diameter, push pedal 11 is provided with one and the corresponding boss 12 in syringe top, push pedal vertically is provided with two parallel soles 13 for 11 times, both sides, sole bottom inwardly are provided with the hook 14 of projection, and the middle part in the sole also is provided with projection 15, and push pedal 11 bottoms are provided with the groove 16 that communicates with boss 12, this groove 16 cooperates with limited post 21 on the knob 20, below description will be arranged.

As Fig. 4 A to shown in the 4C, knob 20 is cylinders, be provided with a limited post 21 above it, this limited post 21 is corresponding with the groove 16 on the piston headstock 10, limited post 21 rotatably inserts in the groove 16, be provided with quadrate detent 22 in the middle of knob 20 bottoms, be provided with to knob 20 sidewall lateral symmetry helical groove 23, and the degree of depth of helical groove 23 shoals gradually along with helix descends, the anglec of rotation of present embodiment is designed to 180 degree, see Fig. 4 C, the depth H 1 of the helical groove 23 of lower end is more shallow than the depth H 2 of upper end, be provided with the darker draw-in groove of the degree of depth 24 at helical groove 23 lower end destination counties, the projection 15 in above-described helical groove 23 and draw-in groove 24 and the sole is corresponding, and the dotted portion among Fig. 4 C is the schematic lines of helical groove 23 and draw-in groove 24; For projection 15 can be stuck in more firmly in the draw-in groove 24, shown in Fig. 4 A, draw-in groove 24 extends vertically downward, and development length is H5, and the degree of depth of draw-in groove 24 from top to bottom deepens gradually, and promptly the A point degree of depth of ordering than B is darker, forms a slope.

Shown in Fig. 5 A, Fig. 5 B; push rod 30 comprises three parts in upper, middle and lower; the shaft 33 width H3 at middle part are greater than the distance H 4 (referring to Fig. 3 A) of two soles 13; top is provided with a platform 31, and the square detent 22 of corresponding knob bottom is provided with bumping square 32 on the platform 31, simultaneously referring to Fig. 1; the hook 14 of sole 13 is limited to platform 31 in the sole 13; the relative position protection that can reach knob 20 and push rod 30 is constant, and when push rod 30 rotations, drives knob 20 rotations simultaneously.

By the installation and the work process of syringe this utility model is done further explanation below in conjunction with each accompanying drawing.

Knob 20 is installed into from sole 13 bottoms, wherein the projection 15 of sole 13 inboards is inserted in the helical groove 23 accordingly, platform 31 setting-ins of reuse push rod 30 advance in the sole 13, it is exactly the state among Fig. 1, at this moment, limited post 21 on the knob 20 inserts in the groove 16, guarantee that knob 20 is unlikely to be offset, and the bumping square 32 on push rod 30 tops inserts in the square detent 22 that matches with it, the hook 14 of piston headstock sole acts on the lower surface of push rod 30 platforms 31, and limit by sole 13, push rod 30 can not up move.After syringe is used, only need rotation push rod 30, at this moment push rod 30 drives knob 20 rotations by bumping square 32, knob 20 is subjected to projection 15 effects on the sole, at this moment the platform liter, is subjected to the effect of helical groove 23 owing to projection 15 gradually, strut outward at leisure, when projection 15 arrived bottom, sole 13 was strutted and is stuck in the syringe inwall fully, exerts oneself slightly again, projection 15 sticks in the draw-in groove 24, be subjected to the extruding of syringe and the effect on draw-in groove 24 slopes, projection 15 slides into the slope bottom, i.e. the A point, at this moment, sole 13 struts fully, and its state is seen Fig. 2, and promptly hook 14 breaks away from the platform 31 of push rod 30 fully, push rod 30 can be removed separately, and piston head is left in the syringe.This wherein also has a design cleverly, be that the height that risen of the aspect ratio knob 20 Rotate 180 degree of the bumping square 32 on push rod 30 tops is big, can guarantee that so just push rod 30 can drive knob 20 always and rotate in this process, and projection 15 is when being stuck in 24 li of draw-in grooves fully, projection 15 is stuck in the A point in the draw-in groove 24, a distance has promptly moved down, this distance is the H5 among Fig. 4 A, at this moment bumping square 32 breaks away from square detent 22 fully, still be subjected to the restriction of sole 13 lower ends, push rod 30 can not up inject, and can reach the purpose that push rod 30 and knob 20 break away from so fully.

According to above principle, the angle of the helical groove of knob sidewall both sides rotation also can be designed to 90 degree, will use bigger strength when this designing requirement is rotated.

Above content be in conjunction with concrete preferred implementation to further describing that this utility model is done, can not assert that concrete enforcement of the present utility model is confined to these explanations.For this utility model person of an ordinary skill in the technical field, under the prerequisite that does not break away from this utility model design, its framework form can be flexible and changeable, can the subseries product.Just make some simple deduction or replace, all should be considered as belonging to the scope of patent protection that this utility model is determined by claims of being submitted to.

Claims

1. syringe is destroyed in disposable rotation, comprise syringe needle, syringe, push rod and piston head, it is characterized in that: described piston head is fixed on the piston headstock, piston headstock lower end snaps onto the top of push rod, goes back the knob that neither one can rotate and strut the piston headstock with push rod between the piston headstock and push rod.

2. syringe according to claim 1, it is characterized in that: the described piston headstock comprises a push pedal that adapts with the syringe internal diameter, push pedal is provided with one and the corresponding boss in syringe top, vertically be provided with two parallel soles under the push pedal, both sides, sole bottom inwardly are provided with the hook of projection, and the middle part in the sole also is provided with projection.

3. syringe according to claim 2, it is characterized in that: described knob is a cylinder, be provided with a limited post above it, corresponding with this limited post, on the push pedal of the piston headstock and boss, be provided with groove, limited post rotatably inserts in the groove, knob is provided with quadrate detent in the middle of the bottom, be provided with to knob sidewall lateral symmetry helical groove, and the degree of depth of helical groove shoals gradually along with helix descends, be provided with the darker draw-in groove of the degree of depth at helical groove lower end destination county, the projection in above-described helical groove and draw-in groove and the sole is corresponding.

4. syringe according to claim 3 is characterized in that: described draw-in groove extends vertically downward, and development length is H5, and the intensification gradually from top to bottom of the degree of depth of draw-in groove, forms a slope.

5. syringe according to claim 4 is characterized in that: the angle of the helical groove rotation of described knob sidewall both sides is 180 degree or 90 degree.

6. according to each described syringe in the claim 2 to 5, it is characterized in that: described push rod shaft is wider than the distance of two soles, the push rod top is provided with a platform, and the square detent of corresponding knob bottom is provided with bumping square on the platform, and the hook of sole is limited to platform in the sole.

7. syringe according to claim 6 is characterized in that: the height H 7 that the height H 6 of described bumping square is risen when rotating maximum angle greater than knob, and H6＜H7+H5.