CN2635108Y

CN2635108Y - Pullback type safety injector capable of operating by single hand

Info

Publication number: CN2635108Y
Application number: CN 03266801
Authority: CN
Inventors: 史昭华
Original assignee: Hengwang Biochemical Science & Technology Co Ltd
Current assignee: Hengwang Biochemical Science & Technology Co Ltd
Priority date: 2003-07-04
Filing date: 2003-07-04
Publication date: 2004-08-25
Anticipated expiration: 2013-07-04

Abstract

The utility model relates to a pulling back safety syringe capable of operating by a single hand, which comprises a needle cylinder, a syringe needle combined with the front end of the needle cylinder and a plunger piston arranged in the needle cylinder, wherein the back end of the needle cylinder is provided with a base edge which generally extends out to different orientations; the rear end of the syringe needle is provided with a first connected portion; the front end of the plunger piston is provided with a second connected portion for fastening with the first connected portion, and the rear end of the plunger piston is provided with an end surface. The base edge of the needle cylinder can be hooked by two fingers, and the plunger piston can be propelled by another finger of the same hand for injection. After the injection is finished, the end surface at the rear end of the plunger piston can be held against by the two fingers, and the outward extending base edge of the needle cylinder can be pushed against by another finger of the same hand to enable the plunger piston to move relative to the needle cylinder, so that the function of pulling back the plunger piston can be realized. A user can propel the plunger piston or pull back the plunger piston by a single hand.

Description

The haulback safety syringe of one-hand operation

Technical field

This utility model relates to the haulback safety syringe that closes a kind of one-hand operation, particularly a kind ofly makes things convenient for the propelling of one-handed performance plunger or pulls back, and to extract or injection liquid medicine, is applicable to the safety injector that medical treatment is used.

Background technology

In medical procedure, the use of syringe is very frequent, reaches two kinds of haulback types but syringe generally is divided into general expression, and the syringe needle secure bond of general expression is in the front end of syringe, and no matter in the injection front and back, its syringe needle all exposes outside, quite has danger; And but the haulback type syringe is with after the liquid medicine injection, can be with in the syringe needle retraction syringe, and comparatively reliable in safety and sanitation.

But the haulback safety syringe of generally commonly using 1 as shown in Figure 1, comprise that syringe 2, that its bottom is provided with two symmetric alar parts 3 is linked to the injection needle 4 of syringe 2 front ends, and a plunger 5 that can in syringe 2, move forward and backward, these plunger 5 rear ends are provided with an end face 6, are beneficial to the push-and-pull operation.

At present, industry is quite paid attention to the singlehanded convenience that uses in the use of safety injector, in the use of above-mentioned conventional security syringe 1, as will be with one-handed performance, general system points the alar part 3 that catches on syringe 2 with two when operation, and another finger advances plunger 5 to finish injection; After injection finishes, prop up plunger 5 rear end end faces 6 with two fingers, the alar part 3 that another finger press syringe 2 is overhanging makes plunger 5 move with respect to syringe 2, and reaches plunger 5 post-tensioning effects; Owing to open outside these alar part 3 both sides, and contract in the pars intermedia, when the time with a finger pushing, the alar part 3 of both sides must be accurately compressed, therefore, the angle of syringe must be rotated sometimes, so conventional security syringe 1 is on one-handed performance, because of the quite inconvenience of restriction of syringe alar part directivity.

Summary of the invention

Main purpose of the present utility model provides a kind of safety injector of one-hand operation, and its back end of syringe is provided with to the comprehensive overhanging base of different azimuth, makes things convenient for user with one hand plunger to be advanced or pulls back, in order to extracting or injection liquid medicine.

For reaching the purpose of above-mentioned utility model, haulback safety syringe of the present utility model comprises: a syringe, its rear end are provided with to the comprehensive overhanging base of different azimuth; One syringe needle is incorporated into the syringe front end, and this syringe needle rear end is provided with first convergence part; And a plunger, place syringe inside, the plunger front end is provided with second convergence part, for the above-mentioned first convergence part snapping, plunger back-end is provided with an end face; By this, can two the finger base of catching on syringe, another finger advances plunger to finish injection; After injection finishes, can prop up the plunger back-end end face by two fingers, the overhanging base of another finger press syringe makes plunger move relative to syringe, reaches the effect of plunger post-tensioning, thereby is available for users to one hand plunger be advanced, or make the plunger post-tensioning.

This utility model is elaborated with instantiation below in conjunction with accompanying drawing.

Description of drawings

Fig. 1 is the axonometric chart of conventional security syringe;

Fig. 2 is the axonometric chart of this utility model first embodiment;

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

Fig. 4 is the combination section of this utility model first embodiment;

User mode figure when figure is this utility model injection;

Fig. 6 is the user mode figure of this utility model when pulling out plunger;

Fig. 7 is the combination section of this utility model when pulling out plunger;

Fig. 8 is the axonometric chart of this utility model second embodiment;

Fig. 9 is the axonometric chart of this utility model the 3rd embodiment;

Figure 10 is the combination section of Another Application example of the present utility model.

Description of reference numerals: syringe 1; Syringe 2; Alar part 3; Injection needle 4; Plunger 5; End face 6; The haulback safety syringe 10 of one-hand operation; Syringe 20; Syringe front end 21;

Base

22,50,60; Syringe needle 30,70; Needle body 31; First convergence part 32; Plunger 40; Second convergence part 41; End face 42; Alar part 61; Standard pin 71; Adaptor 72.

The specific embodiment

Fig. 2 and Fig. 3 show first embodiment of the haulback safety syringe 10 of this utility model one-hand operation, and its primary clustering comprises: a syringe 20, a syringe needle 30 and a plunger 40; Wherein:

This syringe 20 is a hollow cylinder, and its front end 21 inwalls can be incorporated into wherein for syringe needle, and the rear end is provided with vertical with the cylinder axle center and to the comprehensive overhanging base 22 of different azimuth, this base 22 is hexagonal ring-type plate bodys.

Syringe needle 30 is incorporated in the inwall of syringe 20 front ends 21, and its front end has hollow injection needle body 31, and the rear end is provided with first convergence part 32.

Plunger 40 can place syringe 20 inside, and these plunger 40 front ends are provided with second convergence part 41, for above-mentioned first convergence part 32 snappings, plunger 40 rear ends are provided with a vertical outward extending end face 42 with the axle center.

See also Fig. 4～Fig. 7, in this utility model when operation,, the base 22 that can catch on syringe 20 in order to forefinger and middle finger compresses the rear end face 42 of plunger 40 in addition with thumb, plunger 40 is advanced to inject; After injection finished, the finger abdomen of available forefinger and middle finger propped up the rear end face 42 of plunger 40, and the base 22 that reuse thumb pushing syringe 20 is overhanging makes plunger 40 move relative to syringe 20, reaches plunger 40 post-tensioning effects.

Fig. 8 shows second embodiment of the haulback type syringe 10 of this utility model one-hand operation, and wherein, the base 50 of these syringe 20 rear ends is circular ring-type plate bodys, also for stretch out comprehensively, can reach the purpose of utility model.

Fig. 9 shows the 3rd embodiment of the present utility model, wherein, the base 60 of these syringe 20 rear ends comprises six to the overhanging alar part 61 of different azimuth, and with mode annular array uniformly-spaced, its a plurality of alar parts also can be improved the shortcoming of commonly using the alar part that is subjected to the directivity restriction also near stretch out comprehensively.

The

base

22,50,60 of this utility model syringe 20 rear ends is overhanging with different azimuth, if when directly placing on the desktop, syringe 10 can be an angle; Yet, before not injecting, this utility model have a lid (not shown) to cover syringe needle 30, and after the injection, syringe needle 30 is promptly pulled back and is contracted to syringe 20, therefore in fact there is no the misgivings that above-mentioned thing takes place.

See also Figure 10, the hexagon ring-type base 22 of syringe of the present utility model 20 rear ends, also applicable to syringe needle 70 with replaceable standard pin 71, this syringe needle 70 comprises a standard pin 71 and an adaptor 72, standard pin 71 is incorporated on this adaptor 72 removably, adaptor 72 is just as the rear end of aforementioned syringe needle 70, and above-mentioned first convergence part 32 is incorporated on the adaptor 72; In addition, base 50,60 structures that aforementioned second and third embodiment is different are also applicable on should the safety injector 10 of use-case.

Advantage of the present utility model is as follows:

1, because the syringe base, makes the medical personnel can be singlehanded comprehensively or approach and comprehensively stretch out Syringe easily promotes or pulls back.

If 2, medical personnel inject or retract syringe with one hand habitually, certain because having between each finger Working length, so can avoid excessive with the both hands application of force, and plunger and syringe needle are pulled out the syringe outside Shortcoming.

Claims

1, a kind of haulback safety syringe of one-hand operation comprises: a syringe, and one is incorporated into the syringe needle of syringe front end, and this syringe needle rear end is provided with first convergence part; One places the plunger of syringe inside, and the plunger front end is provided with second convergence part, for the above-mentioned first convergence part snapping, plunger back-end has an end face; It is characterized in that: back end of syringe is provided with to the overhanging base of different azimuth.

2, the safety injector of one-hand operation as claimed in claim 1, wherein, the base of this back end of syringe is circular.

3, the safety injector of one-hand operation as claimed in claim 1, wherein, the base of this back end of syringe is polygonal ring-type.

4, the safety injector of one-hand operation as claimed in claim 3, wherein, this is polygon to be hexagon.

5, the safety injector of one-hand operation as claimed in claim 1, wherein, the base of this back end of syringe comprises at least three to the overhanging alar part of different azimuth.

6, the safety injector of one-hand operation as claimed in claim 5, wherein, this base comprises six alar parts.

7, as the safety injector of claim 5 or 6 described one-hand operations, wherein, alar part is uniformly-spaced arranged.

8, the haulback safety syringe of one-hand operation as claimed in claim 1, wherein, this syringe needle comprises a standard pin and an adaptor, and standard pin removably is incorporated on this adaptor, adaptor is just as the rear end of described syringe needle, and described first convergence part is incorporated on the adaptor.