CN200945295Y

CN200945295Y - Safe self-destruction syringe

Info

Publication number: CN200945295Y
Application number: CN 200620045457
Authority: CN
Inventors: 沈海忠
Original assignee: 沈海忠
Current assignee: Shanghai Biotop Technology Co., Ltd.
Priority date: 2006-09-01
Filing date: 2006-09-01
Publication date: 2007-09-12
Anticipated expiration: 2016-09-01

Abstract

The utility model discloses a safe self-destruction syringe, which is characterized in that: an upper neilsbed with a needle pipe arranged on the upper part is arranged in the tube neck on the upper end of the cover, a lower neilsbed is in socket joint with the lower end of the lower neilsbed, the core rob body has a gap near the top, an elastic haul back piece is arranged in the gap, one end of the elastic haul back piece is in fixed connection with the inner wall of the gap, and the other end of the elastic haul back piece slightly extrudes over the gap. The utility model has rational structure, novel design concept, simple operation, convenient product injection molding, and convenient assembling process. Other parts except the needle tube are all plastic pieces, the drug residual quantity is low after completing injection, the resistance is less than 10 newton when the elastic haul back piece on the front end of the core rod and the lower neilsbed are occluded, while separating force bigger than 25 newton can be generated after the both are occluded, enough to successfully haul the lower neilsbed in the external sleeve, with high working stability of products.

Description

A kind of safe self-breaking syringe

Technical field:

This utility model relates to the technical field of medical device, a kind of specifically safe self-breaking syringe, particularly its mechanical connecting structure.

Background technology:

Overwhelming majority hospital in the whole world all uses disposable syringe now, it can effectively avoid the relatively poor infection between the patient in clinical use, stop the malpractice of initiation because the medical appliance sterilization is thorough, but medical and nursing work person still can be taken place because misoperation in its actual use, the inadvertent contamination accident that causes, and then infect as: AISD, hepatitis B, pulmonary tuberculosis (TB), the disease that blood sexuality such as acquired immune deficiency syndrome (AIDS) are dyed, other has some illegal retailers to incite somebody to action, and used disposable syringe reclaims reuse by back door, cause a lot of patient an innocents person to infect the blood sexuality and dye disease, for fear of the generation of above-mentioned incident, various safety types have appearred from syringe or self-destruction syringe on the market now.

Documents one, number of patent application: 200410039572.7, publication number: CN1654094, patentee: Wang Xiping, " a kind of safety injector " disclosed in this case, it includes: sliding sleeve, syringe needle, syringe, piston, spring and the push rod that places in the syringe, the syringe front end is provided with a conehead that cooperates with described syringe needle and dress pin screw thread, syringe needle is installed on the conehead of described syringe front end by described dress pin screw thread, described push rod front end has the union joint that cooperates with described piston, it is characterized in that: described sliding sleeve is set in outside the described syringe slidably, and the sliding sleeve rear portion is provided with two elastic extension plates, respectively is provided with a connection piece on the described elastic extension plate; The sliding sleeve middle part offers a short groove at least, and described short groove place is provided with two elasticity clamps; The sliding sleeve front end is a necking down, and the necking down front end has a baffle plate, and described baffle plate center is provided with a hole that syringe needle is stretched out; The front end of described syringe is provided with a perpendicular end surface, and the cylindrical of syringe is provided with the elongated slot that cooperates with described elasticity clamp, and described elongated slot front portion is provided with a limiting plate, but described limiting plate holding is between described two elasticity clamps; Described syringe outer wall respectively is provided with a junction in the connector corresponding position with the elastic extension plate, and described connecting portion can be connected with the connector on the described elastic extension plate; Described push rod is provided with a sliding sleeve unlocking board in the corresponding position with described sliding sleeve elastic extension plate, at least one is the inclined-plane for the opposite face of described sliding sleeve unlocking board and described sliding sleeve elastic extension plate, when the sliding sleeve unlocking board contacted with sliding sleeve elastic extension plate, the effect low sleeve unlocking board on the inclined-plane can make sliding sleeve elastic extension plate open to both sides slightly.Described spring housing is located at outer the putting of the dress pin screw thread of described syringe, and is compressed between the perpendicular end surface of the baffle plate of described sliding sleeve and described syringe.

Documents two, number of patent application: 200420109618.3, publication number: CN2744359, patentee: Jiang Bo, " a kind of self-destruction syringe " disclosed in this case, it comprises syringe, piston, push rod, is provided with obstruction at the front end of piston, is shaped on agnail in the obstruction, the inwall of the injection orifice of syringe front end is shaped on corresponding agnail groove, obstruction patches syndeton or thin-walled syndeton with the connecting portion employing of piston, and push rod is made easily broken type, adopts some syndeton or thin-walled syndeton.

Above-mentioned patent is a prior art, but still there is weak point, though for example safe syringe can prevent medical and nursing work person because misoperation injures oneself, but syringe still can recycling after use abandons, though and self-destruction syringe can arrive the effect of self-destruction when injection is finished, outside syringe needle point still is exposed to, cause malpractice easily, in sum, still need prior art is further improved, make syringe have the safety self-destruct double effects.

Summary of the invention:

The purpose of this utility model is to provide a kind of safe self-breaking syringe, and it can overcome the existing single shortcoming of syringe function.

To achieve these goals, technical scheme of the present invention is: a kind of safe self-breaking syringe, and it mainly comprises overcoat, needle tubing, is provided with core bar in the overcoat, the core bar place is socketed with plug, it is characterized in that: be provided with needle stand in the tube neck of described outer set upper side, last needle stand upper end is provided with needle tubing, and last needle stand lower end is socketed with down needle stand, the core bar body of rod has a breach near top end, be provided with the elasticity part of pulling back in the breach, a pull back end of part of elasticity is fixedlyed connected with the breach inwall, and its other end slightly protrudes in breach.

The utility model discloses a kind of safe self-breaking syringe, it is rational in infrastructure, and the design concept novelty is simple to operate, the product injection moulding is convenient, packaging technology is convenient, and other parts are working of plastics except that needle tubing, and the medicinal liquid residual quantity was low after injection was finished, resistance was less than 10 newton when core bar front end elasticity was pulled back part and following needle stand interlock, produce greater than the separating force more than 25 newton and understand after both interlocks, can be so that following needle stand be drawn in the overcoat product job stability height smoothly.

Description of drawings:

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

Fig. 2 is a needle stand structural representation on this utility model.

Fig. 3 is a needle stand structural representation under this utility model.

Fig. 4 is this utility model core bar structure sketch map.

Fig. 5 is this utility model jacket structure sketch map.

View when Fig. 6 finishes for this utility model injection.

View when Fig. 7 is this utility model safety self-destruct.

The specific embodiment:

With reference to the accompanying drawings, this utility model further is described

This utility model is a kind of safe self-breaking syringe, as shown in fig. 1, it mainly comprises overcoat 1, needle tubing 4, be provided with core bar 2 in the overcoat 1, core bar 2 places are socketed with plug 3, it is characterized in that: be provided with needle stand 5 in the tube neck of described overcoat 1 upper end, last needle stand 5 upper ends are provided with needle tubing 4, last needle stand 5 lower ends are socketed with down needle stand 6, last needle stand and following needle stand are combined the needle holder that constitutes syringe, core bar 2 bodies of rod have a breach 7 near top end, be provided with the elasticity part 8 of pulling back in the breach 7, a pull back end of part 8 of elasticity is fixedlyed connected with breach 7 inwalls, its other end slightly protrudes in breach 7, elasticity pull back part 8 except with the fixed connection place of breach 7 inwalls, all there are the gap in other position and breach 7 inwalls, the outer wall of last needle stand 5 bottoms laterally is provided with 1-6 circle bulge loop 9, following needle stand 6 upper inside wall are provided with 1-6 ring annular groove 10, its bulge loop 9 with last needle stand is corresponding, the internal diameter at following needle stand lower ending opening place is less than its top internal diameter, following needle stand lower ending opening place forms ring body 11, and ring body 11 tops are provided with the annular groove 12 of pulling back.

In the specific implementation, promote core bar forward, when elasticity is pulled back the part sidewall when touching down the needle stand bottom, because the internal diameter at following needle stand lower ending opening place is less than its top internal diameter, so the core bar front end is easy to push ahead, add elasticity pull back part remove in the fixed connection place of breach inwall, all there are the gap in other position and breach inwall, the elasticity part one end lateral wall of pulling back slightly protrudes in breach, so elasticity is pulled back part when moving up, its lateral wall can be subjected to displacement by pressurized to the inside, as shown in Figure 6, having the pull back core bar end of part of elasticity enters in the needle stand fully, the pull back pressure of part sidewall of elasticity disappears, the elasticity part of pulling back returns to initial condition again, be that the elasticity part one end lateral wall of pulling back slightly protrudes in breach, because needle stand lower ending opening place forms ring body down, ring body top is provided with the annular groove of pulling back, this moment is the pulling core bar downwards, the pull back part of the outstanding breach of part of elasticity can firmly snap in the groove of pulling back, firmly spur core bar more slightly backward, whole needle holder will be taken advantage of a situation and be drawn in the overcoat, as shown in Figure 7, in needle holder entered overcoat, the spacing power of its outer wall disappeared, can be under elasticity is pulled back the effect of the outside restoring force of part to lopsidedness, at this moment, promote core bar forward, the needle tubing top of inclination touches the inwall of outer sleeve neck bottom, promote core bar more forward, the stressed flexural deformation of needle tubing utilizes the line of weakness at core bar place that core bar is fractureed at last, reaches the purpose of syringe overall safety self-destruction.

Claims

1, a kind of safe self-breaking syringe, it mainly comprises overcoat (1), needle tubing (4), be provided with core bar (2) in the overcoat (1), core bar (2) locates to be socketed with plug (3), it is characterized in that: be provided with needle stand (5) in the tube neck of described overcoat (1) upper end, last needle stand (5) upper end is provided with needle tubing (4), last needle stand (5) lower end is socketed with down needle stand (6), core bar (2) body of rod has a breach (7) near top end, be provided with the elasticity part (8) of pulling back in the breach (7), a pull back end of part (8) of elasticity is fixedlyed connected with breach (7) inwall, and its other end slightly protrudes in breach (7).

2, according to a kind of safe self-breaking syringe described in the claim 1, it is characterized in that: elasticity pull back part (8) except with the fixed connection place of breach (7) inwall, all there is the gap in other position and breach (7) inwall.

3, according to a kind of safe self-breaking syringe described in the claim 1, it is characterized in that: the outer wall of going up needle stand (5) bottom laterally is provided with 1-6 circle bulge loop (9).

4, according to a kind of safe self-breaking syringe described in the claim 1, it is characterized in that: following needle stand (6) upper inside wall is provided with 1-6 ring annular groove (10), and its bulge loop (9) with last needle stand is corresponding.

5, according to a kind of safe self-breaking syringe described in the claim 2, it is characterized in that: the internal diameter at following needle stand lower ending opening place is less than its top internal diameter, and following needle stand lower ending opening place forms ring body (11), and ring body (11) top is provided with the annular groove (12) of pulling back.