CN2151756Y

CN2151756Y - Anti-reused injector

Info

Publication number: CN2151756Y
Application number: CN 93207506
Authority: CN
Inventors: 张宝全
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-30
Filing date: 1993-03-30
Publication date: 1994-01-05
Anticipated expiration: 2003-03-30

Abstract

The utility model relates to an anti-reused injector. In order to provide an anti-reused injector which can not be reused after used, the anti-reused injector composed of an injection barrel, a needle head and a push rod assembly is disclosed. One end of the injection barrel is provided with a hollow shaft end for installing the needle head, and the other end of the injection barrel is provided with a flange. The push rod assembly is composed of a push rod, a rubber plug, a retreat stopping structure and a sleeve barrel. The retreat stopping structure is composed of a retreat stopping seat and an elastic retreat stopping agnail arranged on the retreat stopping seat. The sleeve barrel is arranged out of the push rod and can be axially moved along the push rod, the elastic retreat stopping agnail after compressed can be contained by one end of the sleeve barrel, and the end portion of the other end of the sleeve barrel is provided with a flange and more than three strips of axial slots making the end portion provide with elasticity. The diameter of flange position is greater than the internal diameter of the injection barrel.

Description

Anti-reused injector

This utility model belongs to medium is injected the intravital apparatus of people, particularly prevents reusable syringe.

For avoid that cross infection takes place when giving the mankind or animal injectable media, extensively adopt disposable syringe at present, because this disposable syringe does not have and prevents reusable structure, the phenomenon of reusing disposable syringe is occurred repeatedly, thereby not only do not avoid cross infection, and, more increased the weight of the generation of the situation of cross infection because of syringe not being disinfected.

The purpose of this utility model provides a kind of unrenewable after use, reuses the reusable syringe that prevents that then causes the injection tube damage as desire.

This utility model is by injection tube, syringe needle and push rod assembly are formed, one end of injection tube has the hollow axle end that syringe needle is installed, the other end has flange, push rod assembly is by push rod, plug, retaining structure and sleeve are formed, end at push rod has plug and retaining structure successively, the other end at push rod has the push rod dish, the retaining structure is made up of retaining seat and the elasticity retaining agnail that is installed on the retaining seat, elasticity retaining agnail is the arrow shaped of pointing to direction of propulsion, sleeve is outside push rod, and can move axially along push rod, the one end can contain the elasticity retaining agnail after the compression, its other end end has flange and has makes end rubber-like axial groove more than three, flange place diameter is greater than the injection tube internal diameter.

Because this utility model is by injection tube, syringe needle and push rod assembly are formed, one end of injection tube has the hollow axle end that syringe needle is installed, the other end has flange, push rod assembly is by push rod, plug, retaining structure and sleeve are formed, end at push rod has plug and retaining structure successively, the other end at push rod has the push rod dish, the retaining structure is made up of retaining seat and the elasticity retaining agnail that is installed on the retaining seat, elasticity retaining agnail is the arrow shaped of pointing to direction of propulsion, sleeve is outside push rod, and can move axially along push rod, the one end can contain the elasticity retaining agnail after the compression, its other end end has flange and has makes end rubber-like axial groove more than three, flange place diameter is greater than the injection tube internal diameter.When preventing that reusable syringe from using for the first time, because elasticity retaining agnail is inclusive in the sleeve, telescopic flange end nationality helps axial groove and can dwindle radial dimension and be inclusive in the injection tube, thereby push rod assembly is successfully withdrawed from from injection tube, medium is sucked injection tube, until meeting the requirements of injected dose, this moment, telescopic flange end withdrawed from injection tube and nationality helps elastic return to arrive normal size, during injection, when push rod is advanced in injection tube slowly, sleeve also moves thereupon together, when sleeve flange does not contact with the injection tube flange, push rod assembly can move back and forth in injection tube, to adapt to the requirement of injection personnel operation, when sleeve flange contacts with the injection tube flange, because sleeve is stuck, when push rod moves on, sleeve moves no longer thereupon, thereby elasticity retaining agnail is deviate from the sleeve and nationality helps and is elastically against on the barrel wall, slip over barrel wall when in injection tube, advancing smoothly along with push rod, contact with at the bottom of the injection tube until plug, because elasticity is ended agnail and is against on the barrel wall, when use for the second time, when desiring to withdraw from push rod assembly, because of elasticity retaining agnail is stuck on the barrel wall and can't withdraws from, if when withdrawing from by force, elasticity retaining agnail will puncture injection tube, promptly prevent to reuse, thereby reach the purpose of this utility model.

Fig. 1 does not use the pre-structure state diagram for this utility model.

Fig. 2 sucks configuration state figure behind the medium for this utility model.

Fig. 3 finishes back configuration state figure for this utility model injection.

Fig. 4 is the structural representation of this utility model embodiment one.

Fig. 5 is an A-A profile among Fig. 4.

Fig. 6 is the structural representation of this utility model embodiment two.

Fig. 7 is a B-B profile among Fig. 6.

Fig. 8 is the structural representation of this utility model embodiment three.

Fig. 9 is a C-C profile among Fig. 8.

Figure 10 is the structural representation of this utility model embodiment four.

Figure 11 is a D-D profile among Figure 10.

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

Embodiment one:

This utility model is made up of injection tube 1, syringe needle 2 and push rod assembly 3, one end of injection tube 1 has the hollow axle end 11 that syringe needle 2 is installed, the other end has flange 12, have end face annular groove 121 on the flange 12, push rod assembly 3 is made up of push rod 31, plug 32, retaining structure 33 and sleeve 34, push rod 31 has cross cross section, have axle head 311 that plug 32 is installed and the little cross cross-section segments 312 that retaining structure 33 is installed successively at an end of push rod 31, have push rod dish 313 at the other end of push rod 31; Retaining structure 33 is made up of retaining seat 331 and two elasticity retaining agnails 332, retaining seat 331 is rotatably installed on the little cross cross-section segments 312, its periphery forms two and holds the axial groove 3311 of elasticity retaining agnail 332 and have the boss 3312 that two elasticity retaining agnails 332 are installed, one end of two elasticity retaining agnails 332 forms and is the half sagittate end 3321 of pointing to propelling side, the other end has the complications button 3322 on the boss 3312 that is stuck in retaining seat 331, and half sagittate end 3321 places in the axial groove 3311; Sleeve 34 is enclosed within outside the push rod 31 and can moves axially along push rod 31, the one end can contain two elasticity retaining agnails 3332 after the compression, its the other end has flange 341, and has four and make this end rubber-like axial groove 324, and flange 341 place's diameters are greater than the internal diameter of injection tube 1.

Embodiment two:

This utility model is by injection tube 1, syringe needle 2 and push rod assembly 4 are formed, one end of injection tube 1 has the hollow axle end 11 that syringe needle 2 is installed, the other end has flange 12, have end face annular groove 121 on the flange 12, push rod assembly 4 is by push rod 41, plug 42, retaining structure 43 and sleeve 44 are formed, push rod 41 has cross cross section, end at push rod 41 has the axle head 411 that plug 42 is installed, the other end of push rod 41 has push rod dish 412, retaining structure 43 is by the positioning disk 413 of axle head 411 the inners of push rod 41, radially boss 414, axially open 415 and elasticity retaining agnail 431 are formed, during being, elasticity retaining agnail 431 is formed centrally the arrow shaped ends 4312 of the sensing direction of propulsion of split ring 4311, split ring 4311 is buckled in radially on the boss 414, and arrow shaped ends 4312 places in the axially open 415; Sleeve 44 is enclosed within outside the push rod 41 and can moves axially along push rod 41, the one end can contain the elasticity retaining agnail 431 after the compression, its other end end has flange 441 and has four makes this end rubber-like axial groove 442, and flange 441 place's diameters are greater than the internal diameter of injection tube 1.

Embodiment three:

This utility model is by injection tube 1, syringe needle 2 and push rod assembly 5 are formed, one end of injection tube 1 has the hollow axle end 11 that syringe needle 2 is installed, the other end has flange 12, have end face annular groove 121 on the flange 12, push rod assembly 5 is by push rod 51, plug 52, retaining structure 53 and sleeve 54 are formed, push rod 51 has cross cross section, end at push rod 51 has the axle head 511 that plug 52 is installed, the other end of push rod 51 has push rod dish 512, retaining structure 53 is by the positioning disk 513 of axle head 511 the inners of push rod 51, axially open 514, boss 515 in the axially open 514,516 and elasticity retaining agnail 531 form, place an end of the elasticity retaining agnail 531 in the axially open 514 to form to be and point to direction of propulsion and be stuck in two and half sagittate ends 5311 on the boss 515, the other end has tortuous button 5312 on the boss of being stuck in 516, sleeve 54 is enclosed within outside the push rod 51 and can moves axially along push rod 51, the one end can contain the elasticity retaining agnail 531 after the compression, its other end end has flange 541, and have four and make this end rubber-like axial groove 542, flange 541 place's diameters are greater than the internal diameter of injection tube 1.

Embodiment four:

This utility model is by injection tube 1, syringe needle 2 and push rod assembly 6 are formed, one end of injection tube 1 has the hollow axle end 11 that syringe needle 2 is installed, the other end has flange 12, have end face annular groove 121 on the flange 12, push rod assembly 6 is by push rod 61, plug 62, retaining structure 63 and sleeve 64 are formed, push rod 61 has cross cross section, end at push rod 61 has the axle head 611 that plug 62 is installed, the other end of push rod 61 has push rod dish 612, retaining structure 63 is by the positioning disk 613 of axle head 611 the inners of push rod 61, axially open 614, cross muscle 615 and two elasticity retaining agnails 631 in the axially open 614, place the end formation of two elasticity retaining agnails 631 in the axially open 614 to be half arrow shaped ends 6311 of pointing to direction of propulsion, the other end has the discount 6312 on the radial rib that is stuck in cross muscle 615; Sleeve 64 is enclosed within outside the push rod 61 and can moves axially along push rod 61, the one end can contain two elasticity retaining agnails 631 after the compression, its other end end has flange 641, and has four and make this end rubber-like axial groove 642, and the diameter at flange 641 places is greater than the internal diameter of injection tube 1.

Claims

1, a kind ofly prevent reusable syringe, it has syringe needle, it is characterized in that it also has injection tube and push rod assembly, one end of injection tube has the hollow axle end that syringe needle is installed, the other end has flange, push rod assembly is by push rod, plug, retaining structure and sleeve are formed, end at push rod has plug and retaining structure successively, the other end at push rod has the push rod dish, the retaining structure is made up of retaining seat and the elasticity retaining agnail that is installed on the retaining seat, elasticity retaining agnail is the arrow shaped of pointing to direction of propulsion, sleeve and can move axially along push rod outside push rod, the one end can contain compression after elasticity retaining agnail, its other end end has flange and has makes end rubber-like axial groove more than three, flange place diameter is greater than the injection tube internal diameter.

2, according to claim 1ly prevent reusable syringe, it is characterized in that described push rod has cross cross section, have axle head that plug is installed and the little cross cross-section segments that the retaining structure is installed successively at an end of push rod, have the push rod dish at the other end of push rod; The retaining structure is made up of retaining seat and two elasticity retaining agnails, the retaining seat is rotatably installed on the little cross cross-section segments, its periphery forms two and holds the axial groove of elasticity retaining agnail and have the boss that two elasticity retaining agnails are installed, one end of two elasticity retaining agnails forms and is the half sagittate end of pointing to propelling side, and the other end has the complications button on the boss that is stuck in the retaining seat.

3, describedly prevent reusable syringe according to claim 1,2, it is characterized in that described push rod has cross cross section, end at push rod has the axle head that plug is installed, the other end of push rod has the push rod dish, the retaining structure is by the positioning disk of axle head the inner of push rod, radially boss, axially open and elasticity retaining agnail are formed, during being, elasticity retaining agnail is formed centrally the arrow shaped ends of the sensing direction of propulsion of split ring, split ring is buckled in radially on the boss, and arrow shaped ends places in the axially open.

4, describedly prevent reusable syringe according to claim 1,2, it is characterized in that described push rod has cross cross section, end at push rod has the axle head that plug is installed, the other end of push rod has the push rod dish, the retaining structure is made up of boss and elasticity retaining agnail in the positioning disk of axle head the inner of push rod, axially open, the axially open, place an end of the elasticity retaining agnail in the axially open to form to be and point to direction of propulsion and be stuck in two and half sagittate ends on the boss, the other end has warpage button on the boss of being stuck in.

5, describedly prevent reusable syringe according to claim 1,2, it is characterized in that described push rod has cross cross section, end at push rod has the axle head that plug is installed, the other end of push rod has the push rod dish, the retaining structure is by cross muscle and two elasticity retaining agnails in the positioning disk of axle head the inner of push rod, axially open, the axially open, place the end formation of two elasticity retaining agnails in the axially open to be half arrow shaped ends of pointing to direction of propulsion, the other end has the warpage button on the radial rib that is stuck in the cross muscle.