CN204864383U - Single uses syringe that ceases to be in force automatically - Google Patents

Abstract

The utility model discloses a single uses syringe that ceases to be in force automatically, it includes: sleeve, syringe sleeve have internal surface, outlet chamber and the open end of having injectd the cavity, push rod spare, push rod spare include push rod main part, edge blade that the push rod main part distributes, connect the piston in the push rod main part and set up a plurality of tooth portions on the blade edge, the tourus, the tourus can be fixed a position in the cavity with sliding, tourus joint sleeve internal surface, the tourus can move towards the telescopic open end orientation of syringe, and the tourus makes push rod spare and tourus to move towards the telescopic outlet chamber of syringe together with the tooth portion joint of push rod spare, and the rand, the rand hasp is on the sleeve surface, and the rand passes through the rand connecting portion by rand A lamella and rand B lamella and forms. The combination that utilizes rand and tourus makes product failure to the effect of push rod again, and tourus and syringe sleeve inner wall no -float can not pollute liquid medicine or weeping.

Description

Single-use auto-disable syringe

Technical field

This utility model relates to a kind of syringe, particularly relates to a kind of single-use auto-disable syringe.

Background technology

Although prior art provides the syringe with locking member, locking member can automatically lock plunger rod and reuse to help prevent, but the use of these syringes is not also used on a large scale.The typical cost relevant to existing syringe, lures that user is attempted reusing this device into.Therefore, need to produce and not only the most effectively prevented it from reusing but also easy-to-use cost-effective signal use syringe, thus stop trial to be reused.That is, need to produce on a kind of basis reducing material and manufacturing cost and don't the syringe of infringement syringe effect.

Utility model content

This utility model technical issues that need to address are to provide a kind of single-use auto-disable syringe.

For solving technical problem of the present utility model, the technical solution adopted in the utility model is:

Single-use auto-disable syringe, it comprises:

Syringe sleeve, described syringe sleeve has the inner surface, outlet plenum and the opening that define chamber; Push-rod assembly, described push-rod assembly comprises push rod main body, the blade along the distribution of described push rod main body, multiple teeth portion of being connected to the piston in described push rod main body and being arranged on described blade edge; Torus, described annulus physical ability is positioned in described chamber slidably, described torus coupling spool inner surface, torus can move towards the opening direction of syringe sleeve, torus and the teeth portion of described push-rod assembly engage make described push-rod assembly and torus can together with move towards the outlet plenum of syringe sleeve; And collar, described collar snap close is on sleeve outer surface, and described collar is formed by collar connection by collar A lobe and collar B lobe.

Further, described toric shape of cross section is triangle or trapezoidal, and described torus and teeth portion joint are torus inner surface, and torus inner surface is inclined-plane, and torus outer surface matches with collar.

Further, described teeth portion has tooth proximal end face and tooth distal face.

Further, described collar has collar inner surface and collar outer surface, and described collar inner surface has multiple latch, and the hole clipping on described latch and syringe sleeve is locked.

Further, described latch has latch concave surface, latch concave bottom surface, latch concave crown face, the convex end face of latch and latch convex bottom face, described latch concave bottom surface and latch concave crown face are positioned at bottom and the top of latch concave surface, and the convex end face of described latch, latch convex bottom face are positioned at the outside of latch concave surface.

Further, when described torus and collar are locked, described torus outer surface is combined with latch concave surface, and described torus bottom surface is combined with latch concave bottom surface.

Collar and torus all adopt non-metallic material, and cost is low.

The beneficial effects of the utility model: utilize collar and toric combination to make product failure to the effect of push rod again, in injection process, torus and syringe sleeve inwall no-float, can not produce plastic scrap and pollute medicinal liquid or cylinder inwall has flute mark to make leakage.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model.

Fig. 2 is components apart figure of the present utility model.

Fig. 3 is the structural representation of push rod in this utility model.

Fig. 3 a is the enlarged diagram at A place in Fig. 3.

Fig. 4 is the structural representation of this utility model middle sleeve.

Fig. 5 is the structural representation of collar in this utility model.

Fig. 6 is the generalized section of latch in Fig. 5.

Fig. 7 is that in this utility model, collar closes schematic diagram.

Fig. 8 is toric structural representation in this utility model.

Fig. 8 a is toric schematic cross-section in Fig. 8.

Fig. 9 is collar and torus locking state schematic diagram in this utility model.

Fig. 9 a is that in this utility model, collar and torus lock generalized section.

Figure 10 is view before this utility model uses.

Figure 11 is this utility model schematic diagram when being drawn into predeterminable quantity of liquid.

Figure 11 a is the amplification profile at B place in Figure 11.

Figure 12 be this utility model injection complete time schematic diagram.

Wherein,

1, push rod main body, 11, blade, 111, tooth, 1111, tooth proximal end face, 1112, tooth distal face;

2, collar, 21, collar connection, 22, latch, 221, latch concave surface, 222, latch concave bottom surface, 223, latch concave crown face, 224, the convex end face of latch, 225, latch convex bottom face, 23, collar end face A, 24, collar end face B, 25, collar inner surface, 26, collar outer surface, 27, collar A lobe, 28, collar B lobe;

3, syringe sleeve, 31, sleeve outer surface, 32, sleeve interior surface, 33, hole clipping, 34, chamber, 35, outlet plenum, 36, opening;

4, torus, 41, torus inner surface, 42, torus outer surface, 43, torus bottom surface;

5, piston;

6, liquid.

Detailed description of the invention

Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.Following examples, only for illustration of this utility model, are not used for limiting protection domain of the present utility model.

Single-use auto-disable syringe of the present utility model, with reference to figure 1, Fig. 2, Fig. 4, syringe sleeve 3, syringe sleeve 3 has the inner surface 32, outlet plenum 35 and the opening 36 that define chamber 34;

With reference to figure 3, push-rod assembly, blade 11, multiple teeth portion 111 of being connected to the piston 5 in push rod main body 1 and being arranged on blade 11 edge that push-rod assembly comprises push rod main body 1, distributes along push rod main body 1;

Torus 4, torus 4 can be positioned in chamber 34 slidably, torus 4 coupling spool inner surface 32, torus 4 can move towards opening 36 direction of syringe sleeve 3, torus 4 and the teeth portion 111 of push-rod assembly engage make push-rod assembly and torus 4 can together with move towards the outlet plenum 35 of syringe sleeve 3;

Shown in Fig. 5, collar 2, collar 2 snap close is on sleeve outer surface 31, and collar 2 is formed by collar connection 21 by collar A lobe 27 and collar B lobe 28.

Shown in Fig. 8, the shape of cross section of torus 4 is triangle or trapezoidal, Fig. 8 a is depicted as right angled triangle, torus 4 is made up of torus inner surface 41, torus outer surface 42 and torus bottom surface 43, and torus 4 and the junction of teeth portion 111 are the combination of tooth proximal end face 1111 and torus bottom surface 43.As long as the shape of torus 4 meets: that face that torus 4 is corresponding with teeth portion 111 is inclined-plane, the outer surface of torus 4 matches with collar 2, as long as the top and bottom of torus 4 can be fixed just passable.

Shown in Fig. 3 a, teeth portion 111 has tooth proximal end face 1111 and tooth distal face 1112.

Shown in Fig. 5, collar 2 has collar inner surface 25 and collar outer surface 26, and collar inner surface 25 has multiple latch 22, and latch 22 is locked with the hole clipping 33 on syringe sleeve 3.

Shown in Fig. 6, latch 22 has latch concave surface 221, latch concave bottom surface 222, latch concave crown face 223, the convex end face 224 of latch, latch convex bottom face 225, latch concave bottom surface 222 and latch concave crown face 223 are positioned at bottom and the top of latch concave surface 221, and the convex end face 224 of latch, latch convex bottom face 225 are positioned at the outside of latch concave surface 221.

Fig. 7 is that in this utility model, collar closes schematic diagram, and collar end face A23 and collar end face B24 closes in two end faces.

Shown in Fig. 9 and Fig. 9 a, when torus 4 and collar 2 are locked, torus outer surface 42 is combined with latch concave surface 221, and torus bottom surface 43 is combined with latch concave bottom surface 222.

Shown in Figure 10, torus 4 will install to precalculated position before push-rod assembly fills piston 5; The position of torus 4 in the teeth portion 111 of push rod main body 1 can set before dispatching from the factory, and is set the maximum injection amount of this utility model syringe by the distance between default torus 4 and collar 2.

Shown in Figure 11, Figure 12, torus 4 once the position after presetting in the teeth portion 111 of push rod main body 1 just first fixing in the dust, when pumping liquid 6, torus 4 moves along with push rod main body 1 and moves, until pumping liquid reaches maximum preset amount, at this moment torus 4 is locked in collar 2.In Figure 11 a, the long D of tooth should be not less than the height d of torus 4, because torus bottom surface 43 limits teeth portion 111, collar 2 limits torus 4, so row suction action can not be continued, at this moment can only promote push rod and travel forward, once the liquid in syringe is injected complete, syringe just can not carry out suction action again, thus realizes ceasing to be in force automatically function.

Collar 2 and torus 4 all adopt non-metallic material, lower than stainless steel metal locking member cost.Collar 2 is rational in infrastructure with torus 4, can not produce incised wound accident when production and assembly.

Utilize collar 2 to make product failure to the effect of push rod again with the combination of torus 4, in injection process, torus and syringe sleeve inwall no-float, can not produce plastic scrap and pollute medicinal liquid or cylinder inwall has flute mark to make leakage.

Claims (6)

1. single-use auto-disable syringe, is characterized in that, it comprises:

Syringe sleeve, described syringe sleeve has the inner surface, outlet plenum and the opening that define chamber;

Push-rod assembly, described push-rod assembly comprises push rod main body, the blade along the distribution of described push rod main body, multiple teeth portion of being connected to the piston in described push rod main body and being arranged on described blade edge;

Torus, described annulus physical ability is positioned in described chamber slidably, described torus coupling spool inner surface, torus can move towards the opening direction of syringe sleeve, torus and the teeth portion of described push-rod assembly engage make described push-rod assembly and torus can together with move towards the outlet plenum of syringe sleeve; And

Collar, described collar snap close is on sleeve outer surface, and described collar is formed by collar connection by collar A lobe and collar B lobe.

2. single-use auto-disable syringe according to claim 1, it is characterized in that: described toric shape of cross section is triangle or trapezoidal, described torus and teeth portion joint are torus inner surface, and torus inner surface is inclined-plane, and torus outer surface matches with collar.

3. single-use auto-disable syringe according to claim 1, is characterized in that: described teeth portion has tooth proximal end face and tooth distal face.

4. single-use auto-disable syringe according to claim 1, is characterized in that: described collar has collar inner surface and collar outer surface, and described collar inner surface has multiple latch, and the hole clipping on described latch and syringe sleeve is locked.

5. single-use auto-disable syringe according to claim 4, it is characterized in that: described latch has latch concave surface, latch concave bottom surface, latch concave crown face, the convex end face of latch and latch convex bottom face, described latch concave bottom surface and latch concave crown face are positioned at bottom and the top of latch concave surface, and the convex end face of described latch, latch convex bottom face are positioned at the outside of latch concave surface.

6. single-use auto-disable syringe according to claim 2, is characterized in that: when described torus and collar are locked, and described torus outer surface is combined with latch concave surface, and described torus bottom surface is combined with latch concave bottom surface.