CN2604190Y

CN2604190Y - Safety syringe cylinder capable of using standard needle head and withdrawing syringe needle

Info

Publication number: CN2604190Y
Application number: CN 03236319
Authority: CN
Inventors: 吴鹏杰
Original assignee: Hengwang Biochemical Science & Technology Co Ltd
Current assignee: Hengwang Biochemical Science & Technology Co Ltd
Priority date: 2003-01-20
Filing date: 2003-01-20
Publication date: 2004-02-25
Anticipated expiration: 2013-01-20

Abstract

A safe needle cylinder device which can use standard needle and backward drawing type needle comprises a needle cylinder, an adapter, a standard needle, a backward drawing type needle and a column piston. The adapter which is arranged on the front end of the needle cylinder comprises a ring shape shell and a hollow type inner tube, a demountable standard needle is sleeved between the ring shape shell and the hollow type inner tube. The back end of the backward drawing type needle is provided with a first connecting part, and the backward drawing type needle can be inserted and combined in the hollow type inner tube of the adapter, the column piston with a shape of push rod is sleeved in the needle cylinder and moves forward and backward in the needle cylinder; the front end of the column piston is provided with a piston, a second connecting part which can be combined with the first connecting part is arranged on the front end of the piston, medical solution is extracted and injected via front and back motion of the column piston; standard needle can be used in medical solution extraction and the backward drawing needle can be used in injection; when the column piston is pushed to the bottom, the second connecting and the first connecting are combined together, and when the column piston is pulled back, the backward drawing needle can be pulled into the needle cylinder.

Description

Can use the safety syringe-drum device of standard needle and haulback type syringe needle

Technical field

The utility model relates to medical apparatus, especially a kind of safety syringe-drum device of haulback type, specifically a kind of first two different syringe needles of standard needle and haulback type pin that use extract medicine and injection injection respectively, after finishing, injection also the haulback type syringe needle can be drawn in the syringe, and can discard safely or handle, be suitable for being applied in the syringe cylinder or the similar structures of medical supplies.

Background technology

In the prior art, known manual haulback type safety syringe-drum has multiple kenel, for example the United States Patent (USP) count 5,772,687,5,968,020,6,402,721 and 6,409, shown in 704 grades, the United States Patent (USP) the 5th, 931 that the applicant had, also disclose a kind of safety syringe structure of haulback type No. 813, as shown in Figure 1, its structure is to be provided with the first convergence part C11 in the below of the needle stand C1 of haulback type syringe needle C (comprising needle stand C1 and needle body C2) substantially, is provided with in plunger B upper end to be connected the bonded second linking part B1 of part C11 with first, when injection finishes, the plunger B that is installed in the syringe A can upwards be pushed into the summit, make the first linking part C11 be connected part B1 combination with second, thereby the haulback type syringe needle C that will be incorporated into syringe A inwall upper end draws in syringe A inside, be beneficial to waste treatment, in taking out medicine and injection process, be unsuitable for dismounting and replacing but the shortcoming of its existence is above-mentioned its syringe needle of haulback type safety syringe-drum.

Though existing user uses standard needle, and be the syringe of replaceable syringe needle, shown in the 2nd figure, wherein D is the syringe needle of standard specifications, secure bond needle body D2 on it, end is provided with adaptor E (Adapter) on the syringe A, and it includes shell E1 and interior pipe E2, standard needle D removably is incorporated on the adaptor E by the screw thread combination, and this area is called Lure Lock; Other has a kind of adaptor, can removably be embedded on the adaptor in chimeric mode for standard needle, and this area is called Lureslip.And the syringe of above-mentioned use standard needle though replaceable syringe needle uses the back syringe needle can't draw in the syringe, when doing discarded the processing, has and causes dangerous possibility.

In addition, use the syringe cylinder injectable drug often to comprise following action:

1, needle body C2 or D2 are inserted ampoule extraction medicine to syringe.

2, re-use skin or the intravascular injection that same needle body inserts the patient.

And needle body C2 or D2 may be out of shape rust after inserting ampoule and using, so that insert patient's skin or blood vessel, can make the patient produce more violent pain, when especially various medicaments is used together more very.

This novel content

The purpose of this utility model is exactly the defective that overcomes above-mentioned prior art, a kind of safety syringe-drum that uses standard needle and haulback type syringe needle is provided, it in use, the standard needle that can damage to some extent, be out of shape when extract medicine unloads, repacking haulback type syringe needle is for injection, and after the injection, the haulback type syringe needle can be drawn in the syringe again, make and can do the garbage processing more safely.

The purpose of this utility model realizes that by following technical proposals the safety syringe-drum of standard needle and haulback type syringe needle that uses of the present utility model is made up of syringe, adaptor, standard needle, haulback type syringe needle and plunger; Wherein this syringe is a hollow tube, and this adaptor is located at the front end of syringe, has the interior pipe of ring-shaped shell and hollow, is set as between pipe and the shell in it and can removably be socketed on wherein for standard needle; This haulback type syringe needle comprises needle stand and needle body, and the needle stand rear end is provided with first convergence part, and the external diameter of needle stand is corresponding with the internal diameter of the hollow bowl of adaptor again, and can insert on the inwall that is incorporated into hollow bowl; This plunger is the push rod shape for being installed within the syringe, and the plunger front end is provided with piston, the front end of this piston and be provided with can with bonded second convergence part, first convergence part, and the moving forward and backward of mat plunger to draw or liquid medicine injection.During use, but mat adaptor combined standard syringe needle to extract medicine, the standard needle of rust is detachable, repacking haulback type syringe needle is with injectable drug, and when the plunger front end was shifted the summit onto, second convergence part combined with first convergence part when short, when plunger was pulled back, needle stand and needle body can be drawn in the syringe.

Description of drawings

Fig. 1 is the assembly exploded view of the last patent haulback type safety injector that the applicant had.

Fig. 2 is the cutaway view of injection device of the standard needle of an existing known technology;

Fig. 3 is the three-dimensional assembly exploded view of this utility model embodiment;

Fig. 4 is the part combination of components cutaway view of this utility model embodiment;

Fig. 5 extracts the cutaway view of drug condition for this utility model embodiment;

Fig. 5 a is the partial enlarged drawing of the 5th figure;

Fig. 6 is the cutaway view of this utility model embodiment inject state;

Fig. 6 a is the partial enlarged drawing of the 6th figure;

Fig. 7 is the cutaway view of this utility model embodiment injection finishing first convergence part and second convergence part bonding state;

Fig. 7 a is the partial enlarged drawing of the 7th figure;

The cross-sectional schematic that Fig. 8 pulls back injection needle for this utility model embodiment.

The figure number explanation

A, syringe B, plunger

B1, second is connected part C, haulback type syringe needle

C1, needle stand C11, first convergence part

C2, needle body D, standard needle

D2, needle body E, adaptor

E1, shell E2, hollow bowl

1, syringe 2, adaptor

21, hollow bowl 22, shell

221, screw thread 3, standard needle

31, needle body 4, haulback type syringe needle

41, needle body 42, needle stand

43, first convergence part 431, the sour jujube of pulling

421, collar flange 5, plunger

51, push rod 52, piston

53, second convergence part 531, hook portion

Other characteristics of the present utility model and specific embodiment can be in being elaborated below in conjunction with accompanying drawing, and making it has further understanding to it.

The specific embodiment

See also Fig. 3, safety syringe-drum device of the present utility model comprises a syringe 1, one adaptor (Adapter) 2, one standard needle 3, an one haulback type syringe needle 4 and a plunger 5, wherein this syringe 1 is a hollow tube, this adaptor 2 is front ends of being located at syringe 1, have ring-shaped shell 22 and hollow bowl 21, be to be set as to be socketed on wherein for standard needle between shell 22 and the hollow bowl 21, in the present embodiment, as shown in Figure 4, the internal face of this ring-shaped shell 22 is provided with screw thread 221, can be socketed on the adaptor 2 for the mode (Lure Lock) that standard needle 3 spins with screw thread.Also mode as is known during enforcement is set as the outer wall of hollow bowl coniform, and the bottom interior wall of standard needle is set as corresponding shape, make standard needle can directly chimeric (Lure slip) on adaptor 2.

Haulback type syringe needle 4 comprises needle stand 42 and needle body 41, needle stand 42 rear ends are provided with first convergence part 43, and the external diameter of needle stand 4 is corresponding with the internal diameter of the hollow bowl 21 of adaptor 2, needle stand 42 can be incorporated in the channel of hollow bowl 21, and the stage casing outer wall of needle stand 4 can be established the collar flange 421 of at least one circle, to increase the effect of combination and sealing.In the present embodiment, first convergence part 43 is to form the convergence part with recess, and this recess constitutes (seeing also figure 6a) by the spinal plate 431 of pulling more than a slice.

Plunger 5 roughly is a push rod 51 shapes, and front end is provided with piston 52, and the front end of piston 52 also is provided with one second convergence part 53, in the present embodiment, this second convergence part 53 is an outstanding hook portion 531, and this plunger 5 is to do moving of front and back for being inserted in syringe 1, as shown in Figure 4.

Seeing also Fig. 5 and Fig. 5 a, is earlier standard needle 3 screw-casings to be connected between the ring-shaped shell 22 and hollow bowl 21 of adaptor 2 during use, and the needle body 31 of mat standard needle 3 thrusts draws medicine in the ampoule.

After the action of drawing medicinal liquid, mode that can reverse acting spiral is taken off standard needle 3 on adaptor 2, insert in the hollow bowl 21 that is incorporated in the adaptor 2 with haulback type syringe needle 4 again, thereby but mat haulback type syringe needle 4 liquid medicine injections, shown in Fig. 6,6a.

Please again referring to Fig. 7,7a and Fig. 8, when action of injection is finished, can shift plunger 5 front ends onto summit, second convergence part 53 of piston 52 front ends can mutually combine with first convergence part 43 of needle stand 4, it is the end that the hook portion 531 on piston 52 surfaces is stuck in the spinal plate 431 of pulling, at this moment, plunger 5 is pulled back, haulback type syringe needle 4 comprises that needle body 41 can be drawn in the syringe 1.

More than cooperating graphic explanation is a preferred embodiment of the present utility model, and for example first convergence part 43 of needle stand 42 is to have recess, and second convergence part 53 of leaning on plug 5 then is provided with hook portion; And when implementing, can adopt other shape and the structure that can reach the linking effect, all can as long as can reach the identical linking purpose of essence; Certainly, also first convergence part 43 of needle stand 42 can be made as and have hook portion, and second convergence part 531 of plunger 5 is made as and has recess, can reach equally to be connected bonded purpose.

The above, is only in order to the enforceable mode of announcement this utility model, and can not be in order to limit scope of the present utility model, all professional and technical personnel all should be considered as not departing from flesh and blood of the present utility model its significant change of doing and modification.

In sum, safety syringe-drum provided by the utility model has following advantage:

1, use respectively the syringe needle that extracts soup and liquid medicine injection, can avoid using may when extracting soup The syringe needle that damages to some extent, is out of shape, the impression of unlikely increase patient pain.

2, can according to the syringe needle of occasion Application standard syringe needle and pulling-back type, have selective.

3, the syringe needle of pulling back after the injection can be pulled back to syringe, guarantees the safety of offal treatment.

Claims

1, a kind of safety syringe-drum device that uses standard needle and haulback type syringe needle is characterized in that it comprises;

One syringe is a hollow tube;

One standard needle is provided with the needle body of standard specifications;

One adaptor is located at the front end of syringe, and the interior pipe with ring-shaped shell and hollow is set as between interior pipe and the shell and can removably be socketed on wherein for standard needle;

One haulback type syringe needle comprises needle stand and needle body, and the front end of needle stand supplies in conjunction with needle body, and the rear end is provided with first convergence part, and the external diameter of needle stand is corresponding with the internal diameter of above-mentioned hollow bowl again, and can insert on the inwall that is incorporated into hollow bowl; And

One plunger is the push rod shape, and front end is provided with piston, and plunger is for being placed within the syringe, can move forward and backward drawing or liquid medicine injection, piston nose and be provided with can with bonded second convergence part, first convergence part;

When the plunger front end is shifted the summit onto, impel first convergence part to combine with second convergence part, when plunger was pulled back, the haulback type syringe needle can be drawn in the syringe.

2, the safety syringe-drum device that uses standard needle and haulback type syringe needle according to claim 1 is characterized in that first convergence part is to form the convergence part with recess, and second convergence part then is the convergence part that becomes to have protuberance.

3, the safety syringe-drum device that uses standard needle and haulback type syringe needle according to claim 1 is characterized in that first convergence part is to form the convergence part with protuberance, and second convergence part then is the convergence part that becomes to have recess.

4,, it is characterized in that the recess of telling is the sour jujube shape of pulling, and be made of the spinal plate of pulling more than a slice, and protuberance is a claw according to claim 2 or the 3 described safety syringe-drum devices that use standard needle and haulback type syringe needle.

5, the safety syringe-drum device that uses standard needle and haulback type syringe needle according to claim 1 is characterized in that the inwall of shell is provided with screw thread, and standard needle is to be socketed on the adaptor in a spiral manner.

6, the safety syringe-drum device that uses standard needle and haulback type syringe needle according to claim 1, it is coniform to it is characterized in that the outer wall of inner tube of telling forms, and standard needle is tightly to be placed on the adaptor in chimeric mode.

7, the safety syringe-drum device that uses standard needle and haulback type syringe needle according to claim 1 is characterized in that the needle stand outer rim of haulback type syringe needle is provided with at least one loop flange, with in conjunction with and be sealed on the hollow bowl tube wall.