CN2531797Y

CN2531797Y - Syringe with easy separated piston-rod after being withdrawn

Info

Publication number: CN2531797Y
Application number: CN 02206081
Authority: CN
Inventors: 钟健维; 黄锦树; 范日生
Original assignee: Individual
Current assignee: Berkeley International Ltd By Share Ltd
Priority date: 2002-02-21
Filing date: 2002-02-21
Publication date: 2003-01-22
Anticipated expiration: 2012-02-21

Abstract

Disclosed is an injector whose push rod is easy to be detached after being pulled back. The utility model comprises a syringe which has a straight tube shaped syringe body and an accommodating hole passing through the syringe body is arranged therein. A forced opening part is arranged at the side of back opening and a rod drilling hole is arranged in the syringe. A needle stand which is arranged in the accommodating hole is provided with a pull back hook part. A hook stand which is provided with a hook part of needle stand is a needle stand which can be hooked. A hook part of push rod is arranged at the distraction of forced opening part which is forced by the syringe when being pulled back. A push rod is rod shaped and the push rod is provided with a rod body which can be inserted in the accommodating hole of the syringe. One hook joint is connected with the rod body and is hooked by the hook part of the push rod which can be inserted into the hook stand. Therefore, when the needle stand is pulled back to the bottom by the push rod, the hook part of push rod of hook stand can be distracted by the forced opening part of the syringe and then the push rod can be pulled away from the needle stand.

Description

After pulling back, push rod is easy to the syringe that breaks away from

Technical field

This utility model is relevant with safety injector, is meant the syringe that is easy to break away from after a kind of push rod is pulled back especially.

Background technology

Press, general traditional syringe, its push rod plug and are sticked in needle stand or collude after the seat, all be not easy to break away from, and the broken structure of push rod need be arranged; No doubt need a step fractureing in the use.

Yet, several designs are arranged again at present on the market, push rod is designed to can separated structures: still, it is to utilize bigger breakaway force, perhaps need other project organization or mode of operation assist, and is therefore still not ideal enough and remain to be improved.

The creator supervises in above-mentioned shortcoming, the syringe that is easy to break away from after therefore in addition pains research and development this utility model push rod is pulled back.

The utility model content

Main purpose of the present utility model, i.e. the syringe that after providing a kind of push rod to pull back, is easy to break away from, it can make push rod easily from being easy to engaging and breaking away from.

A time purpose of the present utility model, the syringe that after providing a kind of push rod to pull back, is easy to break away from more, it can make operation more easy and convenient.

Edge is to take off the creation purpose before reaching, the syringe that push rod that this utility model provides is easy to break away from after pulling back includes the stack shell that a syringe has a straight-tube shape, and it has provided a containing hole, and one compels out portion is located at the after-opening side, a pole perforating hole; One needle stand is the containing hole that is installed in this syringe, has together pull hook portion; One colludes and closes seat to have a needle stand hook part be can collude to draw this needle stand, and a push rod hook part is located at and strutted by the portion that compels out of this syringe; One push rod is to be elongated rod shape, has the containing hole that a shaft can be inserted in this syringe, and one colludes pull head is arranged in this shaft and can plugs this and collude the push rod hook part of closing seat and collude and draw.Thus, push rod is pulled back needle stand on earth the time, and this colludes the push rod hook part of closing seat and strutted by the portion that compels out of this syringe, take off and can easily this push rod be broken away from needle stand.

Wherein this to collude the push rod hook part of closing seat be that two corresponding pawls that collude of being separated by are arranged.

Wherein this collude close the seat the push rod hook part be establish cylindrical.

Wherein the portion that compels out of this syringe is coniform.

Wherein the portion that compels out the periphery of this syringe is formed with a sliding face that supports.

Wherein the cunning of this syringe is to be circular arc to face.

Wherein this to collude the push rod hook part of closing seat be to have one to be subjected to face, be the shape of gradually opening backward, supports for the portion that compels out of this syringe is slotting.

Wherein this collude close seat to be subjected to face be linearly.

Wherein this collude close seat to be subjected to face be to be circular arc.

Description of drawings

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

Fig. 1 is the side-looking combination section of this utility model one preferred embodiment.

Fig. 2 is the plane exploded view of Fig. 1.

Fig. 3 is that the axonometric chart that closes seat is colluded in this utility model one preferred embodiment.

Fig. 4 is the fastening state figure of this utility model one preferred embodiment.

Fig. 5 is the state diagram of pulling back of this utility model one preferred embodiment.

Fig. 6 is the softened state figure of this utility model one preferred embodiment.

Fig. 7 is the local enlarged diagram of preceding Fig. 6.

Fig. 8 is that this utility model one preferred embodiment push rod takes off state diagram.

Fig. 9 is that the axonometric chart that closes seat is colluded in another preferred embodiment of this utility model.

Figure 10 is that this utility model colludes the difformity sketch map that closes seat.

Figure 11 ab is the difformity sketch map of this utility model syringe.

Figure 12 is the part sectioned view of another structure of this utility model syringe.

The specific embodiment

See also Fig. 1 to Fig. 3, the syringe that is easy to break away from after this utility model one preferred embodiment push rod is pulled back is can be for the sleeve of a syringe needle 60.

Again as shown in Figure 1 to Figure 3, this syringe includes:

One syringe 10, stack shell 11 with a straight-tube shape, it has provided a containing hole 12, one hand-held ear 13 is arranged in the other end outside of this stack shell 11, and an inner ring body 14 extends internally in open rearward end, and one compels out portion 15 is coniform this inner ring body 14 of being located at, the one sliding periphery that is formed at the portion of compeling out 15 to face 16, one pole perforating hole 17 axially is opened in the central authorities that this compels out portion 15, and one supports ring 18 is located at the front end endoporus, and is arranged with a protecgulum 19.

One needle stand 20 is the containing holes 12 that are installed in this syringe 10, has 21, one of pedestals and supports portion 22 and be formed at periphery in this syringe 10, one sealing rings 23 and put the hook part 24 of pulling back, hole 12, for the visitor of this syringe 10 of sealing and be formed at the rear end for fastening, and a syringe needle meets portion 25.

One collude close the seat 30, have a pedestal 31 and be provided with the containing hole 12 of a ring portion 32 for corresponding this syringe 10 of sealing, one needle stand hook part 33 is to collude the hook part 24 of pulling back of drawing this needle stand 20, one push rod hook part 35 it have two to collude pawl 36 and be located at its rear end, respectively be formed with a retaining part 37, be subjected to face 38 be coniform backward gradually open form be formed in its open side.

One push rod 40 is to be elongated rod shape, has a shaft 41 and can be inserted in the containing hole 12 of this syringe 10 and pole perforating hole 17, and collude pull head 43 and be arranged in these shaft 41, one push-and-pulls 45 and be arranged in this and collude pull head 43.

The operation start situation of relevant present embodiment is described as follows now:

As shown in Figure 4, when having injected, the pull head 43 that colludes of this push rod 40 is to insert to throw to be limited to this and to collude the push rod hook part 35 of closing seat 30.

Moreover, can pull back this needle stand 20 some, as shown in Figure 5.

As shown in Figure 6, when pulling back on earth, this colludes 35 inboards, push rod hook part of closing seat 30 is inserted by the portion that compels out 15 of this syringe 10; Then, as shown in Figure 7, when this colludes when closing seat 30 and continue to be pulled back by this push rod 40, the portion that compels out 15 of this syringe 10 plugs this to collude and close seat 30 be subjected to face 38, this colludes and closes two of seat 30 and collude pawl 36 and promptly be subjected to the cunning of the portion that compels out 15 of this syringe 10 to support face 16 to strut, make this collude the push rod hook part 35 of closing seat 30 and be out of shape laterally, and its opening is strengthened.

As shown in Figure 8, when opening to predetermined when big or small, colluding pull head 43 and promptly can not being subjected to the effect that card ends of this push rod 40 colluded the push rod hook part 35 of closing seat 30 and can break away from this easily, and promptly this push rod 40 can be pulled out easily.

In addition, as shown in Figure 9, this colludes the push rod hook part 35A that closes seat and also can be cylindrical shape; In addition, colluding pawl by three or more is again constituted.

Except aforesaid shape, as shown in figure 10, this collude close seat 30 to be subjected to face 38A be also to can be circular arc, inwardly or outside; In addition, collude and close seat and also can not be subjected to, and can directly be subjected to the portion that compels out of this syringe that this retaining part is supported to arrive in distortion, push rod can be pulled out to face.

Same, shown in Figure 11 ab, the cunning of this syringe 10 is supported face 16A, 16B and also be can be circular arc, and is inside or outside.

Again as shown in figure 12, the 15A of the portion that compels out of this syringe is that straight forming is located at the precalculated position in its containing hole 12.

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

1. the syringe that is easy to break away from after this utility model push rod is pulled back, it utilizes the portion that compels out of this syringe, can be when using operation, this push rod is closed seat and separates the enhancement effect of taking off with colluding convenient and strength-savingly.

2. the syringe that is easy to break away from after this utility model push rod is pulled back, its features simple structure need not cooperate again in other operation, can reach its effect quickly and easily, has the enhancement effect of operation convenience.

In sum, the syringe that is easy to break away from after this utility model push rod is pulled back, every characteristics of taking off before having and reached and respectively create purpose, its unitary construction is really at first creating and having progressive and a practicality effect, the condition that meets novel patent is so file an application patent in accordance with the law.

Claims

1. the syringe that is easy to break away from after a push rod is pulled back, it can be established for connecing of a syringe needle, it is characterized in that this syringe includes:

One syringe has the stack shell of a straight-tube shape, and it has provided a containing hole, and one compels out portion is located at the rear end, a pole perforating hole;

One needle stand is the containing hole that is installed in this syringe, has the hook part of pulling back;

One colludes and closes seat, and having a needle stand hook part is can collude to draw this needle stand, and a push rod hook part is located at and strutted by the portion that compels out of this syringe;

One push rod is to be elongated rod shape, has the containing hole that a shaft can be inserted in this syringe, one collude pull head be arranged in this shaft and can plug this collude close the seat push rod hook part trip.

2. be easy to take off the syringe of postal after pulling back according to the described push rod of claim 1, it is characterized in that, wherein this to collude the push rod hook part of closing seat be that two corresponding pawls that collude of being separated by are arranged.

3. the syringe that is easy to break away from after pulling back according to the described push rod of claim 1 is characterized in that, wherein this collude close the seat the push rod hook part be establish cylindrical.

4. the syringe that is easy to break away from after pulling back according to the described push rod of claim 1 is characterized in that wherein the portion that compels out of this syringe is coniform.

5. the syringe that is easy to break away from after pulling back according to the described push rod of claim 4 is characterized in that, wherein the portion that compels out the periphery of this syringe is formed with a sliding face that supports.

6. the syringe that is easy to break away from after pulling back according to the described push rod of claim 5 is characterized in that, wherein the cunning of this syringe is to be circular arc to face.

7. the syringe that is easy to break away from after pulling back according to the described push rod of claim 1 is characterized in that, wherein this to collude the push rod hook part of closing seat be to have one to be subjected to face, be the shape of gradually opening backward, supports for the portion that compels out of this syringe is slotting.

8. the syringe that is easy to break away from after pulling back according to the described push rod of claim 7 is characterized in that, wherein this collude close seat to be subjected to face be linearly.

9. the syringe that is easy to break away from after pulling back according to the described push rod of claim 7 is characterized in that, wherein this collude close seat to be subjected to face be to be circular arc.