CN100423798C

CN100423798C - Self-damaging injector

Info

Publication number: CN100423798C
Application number: CNB200310100718XA
Authority: CN
Inventors: 刘蓉娥
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-10-08
Filing date: 2003-10-08
Publication date: 2008-10-08
Anticipated expiration: 2023-10-08
Also published as: CN1605364A

Abstract

The present invention relates to a self-destroying syringe which can be connected with a needle head. The syringe comprises a needle cylinder, a thrust part, a clamping part, a needle head connecting part, a push rod, a pushing and pulling part, a plug stopping set, a clamping edge, a balancing cylinder and a clamping member, wherein the needle cylinder is provided with a cylinder body and a containing hole; the thrust part is formed by the cylinder body to the direction of the needle head; the clamping part is formed on the inner edge of the containing hole; the needle head connecting part is used for the installation of the needle head; the push rod is provided with a rod body and a clamping member connected to the rod body; the pushing and pulling part is arranged on the back end of the rod body for fingers to push and pull; the plug stopping set is provided with a dish-shaped plug body which can forwards pass through the clamping part of the needle cylinder by deforming and is clamped on a moving plug of the needle cylinder during backset to be arranged in the containing hole of the needle cylinder; the clamping edge is formed on the plug body and is an elastic clamping part; the balancing cylinder is connected to the plug body and can extend backwards in an elastically inwards shrunk mode, and a balancing butting edge which is butted on the hole wall of the containing hole of the needle cylinder is formed on the balancing cylinder; the clamping member is connected to the plug body, and can be clamped with the clamp member of the push rod to be linked with the push rod. When the plug stopping set is back drawn by the push rod, the clamping member of the push rod or the clamping member of the plug stopping set can generate disjunction, and the plug stopping set is still clamped in the needle cylinder.

Description

Self-destruction syringe

Technical field

The present invention is relevant with syringe, is meant a kind of self-destruction syringe especially.

Background technology

Press, conventional injector may be used injection again, thereby will be caused the situation that infected by the injector after having injected.

Therefore, the self-destruction syringe that multiple different structure promptly arranged in response to and give birth to, still, wherein be no lack of multiple very complicated design, the higher or operating difficulties of its cost and can't extensively being used; In addition, some simple designs are arranged again, but it may cause the correctness of injection bad, perhaps still reusable, or brought subject matters such as recycling the back use easily.

For example, general type self-destroyed syringe, but normally directly integrally formed its dialysis of a fastener and can be limited to the syringe predetermined position on push rod, such design major part must add a plug, because the card of die forming demoulding integral type ends comparatively difficulty of edge, perhaps its die parting line must be positioned at periphery or vertically can't seal with the endoporus of this syringe, causes leakage easily.

The applicant supervises in above-mentioned shortcoming, therefore in addition pains research and development self-destruction syringe of the present invention, and it can reach following each goal of the invention.

Summary of the invention

Main purpose of the present invention is promptly providing a kind of self-destruction syringe, and it can make the detent plug group remain in syringe inside after finishing injection, and can prevent to reuse.

An of the present invention purpose more providing a kind of self-destruction syringe, and it can make the easy to manufacture of member, combination and easy to operate.

Another object of the present invention is providing a kind of self-destruction syringe again, and it also can make the containing hole slippage of this detent plug group and this syringe have balanced action.

A further object of the present invention is more providing a kind of self-destruction syringe, and it can make the portion of breaking of this push rod can not produce torsional fracture because of rotation.

Edge makes eye bright with exposure before reaching, self-destruction syringe provided by the present invention, be to establish for connecing of a syringe needle, this syringe includes a syringe to have a stack shell and is provided with a containing hole, one push stopping part is formed to the syringe needle direction by this stack shell, one fastener is formed at this containing hole inner edge, and a syringe needle portion of connecing is for the installing of syringe needle; One push rod has a shaft, and a shackle member is arranged in this shaft, and a push-and-pull portion is located at the push-and-pull usefulness of its rear end for finger; One detent plug group has the containing hole that cock body plug in the form of annular discs and movable is located at this syringe, one card ends edge, and to be formed at this cock body be elastically deformable ground is arranged in this syringe forward when retreating by the fastener now of this syringe fastener, but be arranged in this cock body a surge drum and contract in the elasticity to extend back and be formed with a balance and support edge and support the containing hole hole wall of being located at this syringe, a shackle member is arranged in this cock body and can makes with the shackle member clamping of this push rod and this push rod interlock; When this detent plug group was pulled back by this push rod, the shackle member of the shackle member of this push rod or this detent plug group was to produce dialysis, and this push rod is pulled back and this detent plug group still is limited to this syringe, and syringe can't be used once again.

Wherein the card of this detent plug group ends the containing hole that edge is salable this syringe.

Wherein this detent plug group also is provided with the containing hole that a plug seals this syringe.

Wherein this push rod has the portion of breaking and is formed between this shaft and shackle member.

Wherein this surge drum is to be to arrange by a plurality of balancing patches to form.

Wherein this push rod also have one the card transfer part, and this detent plug group also have one the card transfer part can engage with the card transfer part of this push rod, can prevent the rotation to axial between this push rod and detent plug group.

Wherein the card transfer part of this push rod is made up of some raised lines, and the card transfer part of this detent plug group also is made up of some draw-in grooves.

Wherein this detent plug group has an annular groove in this cock body inboard.

Wherein the cock body of this detent plug group is tapered.

Wherein this push rod also has one and supports portion, and this detent plug group also have one support portion can with the portion that the supports pushing and pressing of this push rod.

Description of drawings

More understand characteristics of the present invention and effect for making, be described in detail as follows below in conjunction with embodiment and conjunction with figs., wherein:

Fig. 1 is the assembled sectional view of a preferred embodiment of the present invention.

Fig. 2 is the plane exploded view of a preferred embodiment of the present invention.

Fig. 3 is a mode of operation figure of a preferred embodiment of the present invention, shows the urgent state that supports the fastener of syringe of detent plug group.

Fig. 4 is another operation chart of a preferred embodiment of the present invention, and the demonstration push rod is shifted the detent plug group onto the state at the end.

Fig. 5 is a preferred embodiment of the present invention operation chart again, shows that push rod retracts the state of interlock detent plug group a little.

Fig. 6 is the another operation chart of a preferred embodiment of the present invention, shows the state of the portion that the breaks dialysis of push rod.

Fig. 7 is the axonometric chart of another detent plug group of the present invention.

Fig. 8 is the exploded perspective view of another push rod of the present invention and detent plug group.

Fig. 9 is the constitutional diagram that detent plug group of the present invention installs a plug additional.

Figure 10 is the cutaway view of the another detent plug group of the present invention, shows that its cock body generally is the discoid structure of planar shaped.

Figure 11 is the more cutaway view of a detent plug group of the present invention, shows that this shackle member is formed with the structure of some claws.

Figure 12 is the plane decomposing schematic representation of push rod of the present invention and detent plug group, shows the state that the two interface arrangment exchanges.

The specific embodiment

See also Fig. 1 to Fig. 6, a preferred embodiment of the present invention self-destruction syringe is to connect to establish a syringe needle N; This syringe includes:

One syringe 10, having a stack shell 11 is straight-tube shape and is provided with a containing hole 12, one push stopping part 13 is formed to syringe needle N direction by this stack shell 11, one fastener 15 is formed at leading portion in this containing hole 12, one syringe needle connects the installing of portion 16 for syringe needle N, one hand-held ear 17 is arranged in this stack shell 11 rear ends, and push rod retaining edge 18 is located near containing hole 12 opening parts.

One push rod 30, have a shaft 31 and can plug the containing hole 12 of this syringe 10, one shackle member 33 is arranged in this shaft 31, one breaks portion 34 is formed between this shaft 31 and the shackle member 33, one connecting portion 35 is formed at this shackle member 33 peripheries, one supports portion 36 is positioned at this shaft 31 front ends, and a push-and-pull portion 37 is located at the push-and-pull of its rear end for finger, and a removal stop section 38 can support the push rod retaining edge 18 that terminates in this syringe 10.

One detent plug group 40, be with plastic material PE (Polyethylene, polyethylene) ejection formation, has the tapered discoid and strain slightly of a cock body 41, one card end that edge 42 is formed at these cock body 41 peripheries and can be forward by and be limited to the fastener 15 of this syringe 10 backward, this card ends the containing hole 12 that edge 42 is proper salable these syringes 10 in present embodiment, one shackle member 43 is arranged in 41 pairs of this cock bodys should push rod 30 directions, one blocked hole 44 is formed in this shackle member 43, one connecting portion 45 be formed at this blocked hole 44 and can with connecting portion 35 hook joints of this push rod 30, one support portion 46 can with this push rod 30 support portion's 36 contacts, and an extension rod 47 is arranged in front end.

In addition, but this detent plug group 40 also has a surge drum 48 to be annular cylinder shape to be arranged in this cock body 41 and to extend back with contracting in the elasticity, and be formed with a balance in these surge drum 48 peripheries and support edge 481 and support containing hole 12 hole walls of being located at this syringe 10, it is the effects that also can have sealing concurrently that this balance is supported edge 481; And more be formed with an annular groove 49 in these cock body 41 inboards, make these cock body 41 more convenient strains when pushing ahead.

The operational scenario of relevant present embodiment is described as follows now:

When it promotes to operate forward, as shown in Figure 3, be that this push rod 30 pushes away forward and makes the portion 46 that supports that supports portion's 36 these detent plug groups 40 of pushing and pressing with it, the card of this detent plug group 40 end slightly strain and passing through of fastener 15 that edge 42 promptly compels to support this syringe 10; In pushing course, it is to containing hole 12 hole walls of being located at this syringe 10 that the balance of these detent plug group 40 surge drums 48 is supported edge 481, and can make this detent plug group 40 in keeping balance; Then, as shown in Figure 4, shift this push rod 30 onto cock body 41 that the end makes this detent plug group 40 and compress push stopping part 13, and injecting liquid drug can be gone out to this syringe 10.

During pullback operation, as shown in Figure 5, this push rod 30 is pulled back and is promptly driven this detent plug group 40 displacements backward for it, and make the card of this detent plug group 40 end edge 42 retaining is butted on the fastener 15 of this syringe 10, and makes this detent plug group 40 displacement again; At this moment,, and make push rod 30 to pull back if continuing firmly to spur this push rod 30 more promptly can make it break portion's 34 dialysis, and the containing hole 12 that the shackle member 33 of these push rod 30 dialysis and detent plug group 40 still are limited to this syringe 10, as shown in Figure 6.

Therefore, this syringe promptly is the alleged self-destruction state of industry this moment, can't be repeated to use again and has a safety.

In addition, can be because this detent plug group 40 is adopted single-piece by the axial demoulding, the die parting line of its formation can not influence the sealing that its card ends the containing hole 12 of edge 42 and this syringe 10, therefore can not use plug.

Member manufacturing cost of the present invention can greatly reduce, and possesses self-destroying function, therefore is expected to replace the market of traditional type syringe.

Except above embodiment, the present invention also can implement as follows:

Except above embodiment, the surge drum of aforementioned this detent plug group is also to can be other various structures, and as shown in Figure 7, wherein this surge drum is that balancing patch 48A by multi-disc is five equilibrium and arranges and form.

Again, this push rod of the present invention and detent plug group also can be done following design:

As shown in Figure 8, this push rod also have one the card transfer part 39A its be to combine by some raised lines 391; In addition, this detent plug group also has a card transfer part 46A, and it is to be combined by some draw-in grooves 461, the card transfer part 46A of this detent plug group can engage with the card transfer part 39A of this push rod and can prevent rotation to axial between this push rod and detent plug group, makes the portion that breaks 34 of this push rod not produce the situation of torsional fracture because of rotation.

In addition, as shown in Figure 9, this detent plug group also can also have the front end that a plug 50 is installed in this cock body, so that the containing hole sealing function of this syringe relatively to be provided; Perhaps, also can be installed in the rear end (figure does not show) of this cock body.

Moreover as shown in figure 10, the cock body 41A of this detent plug group of the present invention also can be to be the discoid design of planar shaped.

And as shown in figure 11, but the shackle member 43A of this detent plug group is its elastic bending deflection of some calvus, and its connecting portion 45A is formed in this each shackle member 43A for a reverse-hook shape.

Perhaps, as shown in figure 12, the shackle member 43B of the shackle member 33B of this push rod and this detent plug group be with last embodiment in structure exchange, and this push rod can and separate with the main body dialysis of this detent plug group the shackle member 43B pulling of this detent plug group when pulling back.

By above each embodiment explanation, it is as follows to conclude characteristics of the present invention:

1. self-destruction syringe of the present invention, it can make the detent plug group keep being limited to this syringe inside after finishing injection, and can prevent to reuse.

2. self-destruction syringe of the present invention, the combination and the isolating construction of its detent plug group and push rod are simple and easy, the simple and low cost of manufacture of member, and have effects such as easy to operate.

3. self-destruction syringe of the present invention, it more can make, and slippage has balanced action between the containing hole of detent plug group and syringe.

4. self-destruction syringe of the present invention, wherein the card transfer part of push rod and detent plug group only can be blocked mutually, makes the portion of breaking of this push rod can not produce torsional fracture because of rotation.

Claims

1. a self-destruction syringe is to establish for connecing of a syringe needle, it is characterized in that this syringe includes:

One syringe has a stack shell and is provided with a containing hole, and a push stopping part is formed to the syringe needle direction by this stack shell, and a fastener is formed at this containing hole inner edge, and a syringe needle portion of connecing is for the installing of syringe needle;

One push rod has a shaft, and a shackle member is arranged in this shaft, and a push-and-pull portion is located at the push-and-pull usefulness of its rear end for finger;

One detent plug group, have cock body plug in the form of annular discs and movable and be located at the containing hole of this syringe, one card ends edge, and to be formed at this cock body be elastically deformable ground is arranged in this syringe forward when retreating by the fastener now of this syringe fastener, extend back but a surge drum is arranged in this cock body with contracting in the elasticity and be formed with a balance and support edge and support the containing hole hole wall of being located at this syringe, a shackle member is arranged in this cock body and can makes with the shackle member clamping of this push rod and this push rod interlock; When this detent plug group was pulled back by this push rod, the shackle member of the shackle member of this push rod or this detent plug group was to produce dialysis, and this push rod is pulled back and this detent plug group still is limited to this syringe, and syringe can't be used once again;

Wherein this push rod has the portion of breaking and is formed between this shaft and shackle member;

And this detent plug group is with the plastic material ejection formation, and the card of this detent plug group ends the containing hole that edge is salable this syringe; In addition, this detent plug group is adopted single-piece and by the axial demoulding, and the die parting line of its formation can not influence the sealing that its card ends the containing hole of edge and this syringe.

2. according to the described self-destruction syringe of claim 1, it is characterized in that wherein this detent plug group also is provided with the containing hole that a plug seals this syringe.

3. according to the described self-destruction syringe of claim 1, it is characterized in that wherein this surge drum is to be to arrange by a plurality of balancing patches to form.

4. according to the described self-destruction syringe of claim 1, it is characterized in that, wherein this push rod also have one the card transfer part, and this detent plug group also have one the card transfer part can engage with the card transfer part of this push rod, can prevent the rotation to axial between this push rod and detent plug group.

5. according to the described self-destruction syringe of claim 4, it is characterized in that wherein the card transfer part of this push rod is made up of some raised lines, and the card transfer part of this detent plug group also is made up of some draw-in grooves.

6. according to the described self-destruction syringe of claim 1, it is characterized in that wherein this detent plug group has an annular groove in this cock body inboard.

7. according to the described self-destruction syringe of claim 1, it is characterized in that wherein the cock body of this detent plug group is tapered.

8. according to the described self-destruction syringe of claim 1, it is characterized in that wherein this push rod also has one and supports portion, and this detent plug group also have one support portion can with the portion that the supports pushing and pressing of this push rod.