CN2422971Y

CN2422971Y - Self-destruction disposable injector

Info

Publication number: CN2422971Y
Application number: CN 00208685
Authority: CN
Inventors: 宾福玉
Original assignee: Individual
Current assignee: Individual
Priority date: 2000-05-11
Filing date: 2000-05-11
Publication date: 2001-03-14
Anticipated expiration: 2010-05-11

Abstract

The utility model relates to a self-destruction type disposable injector, which is composed of an outer cylinder and a push-pull rod connected with a piston. The push-pull rod is formed by a push-pull sleeve being sheathed in a push-pull handle, and is connected with a piston part by a clamping groove at the center of an end head clamping holder of the push-pull sleeve being inserted into a taper point top of a piston connector. When the push-pull rod is push to a certain degree, the push-pull sleeve is blocked, the push-pull handle is continuously pushed to push the taper point top to be separated from the clamping groove, and therefore, the whole piston part is separated from the push-pull rod; when the push-pull rod is pulled backwards again, the piston part can not be driven to move, and therefore, the purpose of self-destroying the injector is achieved. The utility model has the advantages of simple structure and production process, easy assembly, convenient operation, and effective prevention of repeatedly using the injector.

Description

Re-use preventing once-used syringe

This utility model relates to medical instruments field, specifically is a kind of re-use preventing once-used syringe.

At present, " disposable " plastic injector of selling on the market and using, it can not ruin type automatically, and can repeated multiple times use, and does not reach the specification requirement of real " disposable ", has wretched insufficiency in prevent disease and cross infection.In order to reach real disposable purpose, the domestic people of having designs various self-destruction disposable syringes, for example, ruins type with the expanding material water-swellable, a dress watt type reed is ruined type, and elastic component is ruined type, contracts in the syringe needle and ruins type, needle-penetration is ruined type, and type, the telescopic type etc. of ruining of retaining are ruined in the element fracture.In known self-destruction disposable syringe, or exist and to meet the deliquescence body easily and to be difficult for long-term storage, or adopt hardware to get rusty easily, or the design technology complexity, be difficult for producing, or assembling is inconvenient, or shortcoming such as production cost height.

This utility model purpose is to overcome the defective that known technology exists, and provides a kind of structure, production technology simple, assembling easily, re-use preventing once-used syringe easy to use.

This utility model re-use preventing once-used syringe is by circular outer cylinder, the push-pull bar and the syringe needle that are connected with piston are formed, wherein push-pull bar is to be inserted in push-pull handle by the push-and-pull cover to constitute, the push-and-pull cover is short slightly, its tail end has projection to push away card to make it be hampered by urceolus, inwall has projection to draw Ka Ding to pull back with a pushing tow pull handle, the top is a deck, there is the tension force seam in deck central authorities, have draw-in groove in the tension force seam, the awl pinnacle of inserting piston connector in draw-in groove fuses whole piston portion and push-pull bar, and this awl pinnacle is inserted into a pushing tow pull handle end in the push-and-pull cover always, has resistance to be positioned at the push-pull handle wall and draws the projection of Ka Ding to draw card.

Below in conjunction with drawings and Examples this utility model is described.

Fig. 1 is this utility model cross-sectional view.

Fig. 2 is that Fig. 1 embodiment piston portion breaks away from push-pull bar cut-away section structural representation.

As shown in the figure: the tail end of circular outer cylinder 13 has the card that pushes away of indent to push up 7, and the piston draw-in groove 3 of indent is arranged near the inwall at top.Be inserted in push-pull handle 12 by short slightly push-and-pull cover 14 and constitute push-pull bar.The tail end evagination of push-and-pull cover 14 becomes to push away card 8, and inwall has the card that draws of projection to push up 10, and the top is for connecting the deck 4 of piston portion, and these deck 4 centers have the draw-in groove 5 of indent.Push-pull handle 12 walls have corresponding to the projection of drawing card top 10 and draw card 9, and the top is circular push-plate 11.Piston 2 is fixed on the piston connector 1, piston connector 1 is extended with awl pinnacle 15, the bossed convex clip 6 of these awl pinnacle 15 walls, draw-in groove 5 interior recesses interior and that make its convex clip 6 be stuck in draw-in groove 5 are inserted along tension force seam 16 in awl pinnacle 15 make it to link into an integrated entity, bore pinnacle 15 simultaneously and pass 4 tip circle shapes of deck push-plate 11.It is metal that the present embodiment syringe removes syringe needle, and piston is a rubber bodies, and remaining part is plastic construction, has no side effect, and do not worry antirust and meet deliquescence body problem, and structure, production technology is simple, and assembling easily, and is easy to use.

During use, when the liquid in the syringe will have been injected, push away card 8 and be hampered by and push away card top 7 and make push-and-pull cover 14 can not continue to advance, this moment piston 2 as shown in Figure 1, still have 0.5 centimetre apart from tops in the urceolus 13.As shown in Figure 2, make its circular push-plate 11 direct pushing tow awl pinnacles 15 when continuing to promote push-pull handle 12, convex clip 6 impels the tension force seam 16 on the deck to open under the effect of thrust, convex clip 6 is ejected deck 4, promotes piston 2 to urceolus 13 interior tops simultaneously liquid is injected away fully.Pumpback this moment push-pull handle 12 has been pushed out draw-in groove 5 and has separated dislocation with deck 4 owing to bore pinnacle 15, and piston 2 only has push-and-pull cover 14 to be pulled because " from the tension force " of rubber is stuck in the piston draw-in groove 3.Owing to have 0.5 centimetre range difference between piston connector 1 that breaks away from and the push-and-pull cover 14, under the situation of not destroying syringe urceolus 13, can't restore again.

Claims

1. re-use preventing once-used syringe, constitute by urceolus (13) and the push-pull bar that is connected with piston (2), it is characterized in that push-pull bar is inserted in push-pull handle (12) by push-and-pull cover (14) and constitutes, push-and-pull cover (14) tail end has projection to push away card (8), inwall has projection to draw Ka Ding (10), the top is deck (4), there is tension force seam (16) in deck (4) central authorities, have draw-in groove (5) in the tension force seam (16), in draw-in groove (5), insert the awl pinnacle (15) of piston connector (1), this awl pinnacle (15) enters the circular push-plate (11) of pushing tow pull handle (a 12) end in the push-and-pull cover (14), and what push-pull handle (12) wall had that resistance is positioned at La Kading (10) draws card (9).

2. according to the described re-use preventing once-used syringe of claim 1, it is characterized in that boring the bossed convex clip in pinnacle (15) (6), draw-in groove (5) has indent that should convex clip (6), makes draw-in groove (5) effectively block awl pinnacle (15).

3. according to claim 1 or 2 described re-use preventing once-used syringes, it is characterized in that having the piston draw-in groove (3) of indent and pushing away Ka Ding (7) at the inwall of urceolus (13).