CN2889323Y - Safety medical syringe with needle automatically retraction - Google Patents
Safety medical syringe with needle automatically retraction Download PDFInfo
- Publication number
- CN2889323Y CN2889323Y CN 200620102721 CN200620102721U CN2889323Y CN 2889323 Y CN2889323 Y CN 2889323Y CN 200620102721 CN200620102721 CN 200620102721 CN 200620102721 U CN200620102721 U CN 200620102721U CN 2889323 Y CN2889323 Y CN 2889323Y
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- China
- Prior art keywords
- syringe
- needle
- needle stand
- head
- ejector sleeve
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- Expired - Lifetime
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Abstract
The utility model relates to a safe medical syringe with an automatic slow withdraw needle, which is characterized in that the needle bar includes a flexible connectivity needle bar with a syringe and a needle bar case for fixing the flexible connectivity needle bar, a spring is installed between the flexible connectivity needle bar and the needle bar case, the flexible connectivity needle bar can apart from the cylinder's head and withdraw due to the action of the spring after pushing, a slow withdraw set axial corresponding to the flexible connectivity needle bar is fixed on the front end of the corn pole, the slow withdraw set comprises a support shield ring and a slow withdraw frame which has at lease two flexible support claws corresponding to the inner wall of the pushing tube at the front part of the core pole. After injection, the flexible connectivity needle bar ejects the slow withdraw set by the cylinder's action to let the flexible connectivity needle fall back to the cylinder's inside slowly so as to hold the needle in the syringe. The utility model solves the problem in the prior art that the withdraw speed is too fast to cause the second infection due to the blood spurts into the pinhole under the pressure of the human body.
Description
Technical field
This utility model relates to a kind of injector for medical purpose, and especially a kind of syringe needle can bounce back automatically and pull out pin, uses the back syringe needle to conceal automatically to be unlikely to expose the injector for medical purpose of hurting sb.'s feelings without the doctor.
Background technology
Facts have proved of modern medicine, for avoiding to the input of the mankind or animal or cross infection takes place when taking out medium, hypodermic syringe must disposable use, is using later promptly as garbage disposal.Using maximum disposable syringes at present is by a cavity syringe, syringe needle and the journey piston of deciding that is fitted in the syringe are formed, the existing greatest problem of this syringe is after injection finishes, its syringe needle still is trapped in the outside, sharp-pointed degree with respect to syringe needle, it not only is the carrying of syringe rubbish, destroying makes troubles, often take place because of the thing of stabbing the medical and nursing work personnel accidentally simultaneously, this the secondary cross infection of pathogenic bacteria just inevitably can occur, particularly be used to suffer from serious infectious disease (as acquired immune deficiency syndrome (AIDS) for those, hepatitis, SARS etc.) syringe of patient's use, the medical hidden danger that can not ignore especially, practice shows, the damage that the needle stick injuries that dangerous needle set causes obviously causes more than other accidents.
In recent years, along with it is found that disposable syringe do not had good people reclaim use repeatedly after, in having proposed self-destruction syringe at the end of last century, self-destruction syringe can destroy voluntarily after it uses or be locked and can not reuse.But some present syringes all have an important disadvantages, and that is exactly that the nurse will manually pull out pin after injection finishes, and are complicated thereby the injection manipulation that makes becomes, and make troubles for medical worker's use; A kind of syringe needle is arranged in addition with the automatic retractable syringe of spring, this syringe is after injection is finished, syringe needle can bounce back in the syringe under the effect of spring automatically, but the shortcoming of this syringe be moment retraction speed too fast, blood is sprayed in the acupuncture treatment hole by the pressure of human body own, causes the secondary cross infection.
Summary of the invention
Technical problem to be solved in the utility model is: after providing a kind of injection to finish, and the safe medical syringe of needle capable of automatically retracting to the syringe.This syringe thoroughly solves the problem of the secondary cross infection that exists in the prior art.
In order to solve the problems of the technologies described above, this utility model is by the following technical solutions: a kind of safe medical syringe with needle capable of automatically retracting, comprise a hollow barrel, one is installed in the core bar in the described syringe, one is installed in the plug of core bar head, one is installed in the needle stand of described syringe head, described core bar front portion is an ejector sleeve, it is characterized in that: described needle stand comprises that the resilient connection needle stand that entry needle is housed reaches the fixedly needle stand cover of resilient connection needle stand, described resilient connection needle stand and needle stand inner room are provided with spring, described resilient connection needle stand after pushing away liquid and finishing, can break away from described syringe head and the effect at spring under bounce back, described core bar front end be equipped with the resilient connection needle ingot shaft to low-speed retraction device corresponding and that match, this low-speed retraction device is fitted by backup washer and low-speed retraction support and constitutes, and described low-speed retraction rack forming has at least two elasticity support claws that cooperate with the forward ejector sleeve inwall of core bar.
In order to solve the problems of the technologies described above, this utility model adopts following further technical scheme: a groove is arranged at the top of described low-speed retraction support, described elasticity support claw head forms outside boss platform, upside is provided with boss in the described ejector sleeve, can be superimposed with the outside boss platform of elasticity support claw head.
Described backup washer head molding one gap slot, the bottom forms the dome circle, and the head of described elasticity support claw forms inboard boss platform, and the dome circle outside, bottom and the inner convex platform of elasticity support claw of described backup washer are fitted.
The upper outside and the plug of described backup washer closely cooperate, the endoporus of the middle part outside and ejector sleeve head movingly, the bottom is provided with a boss upper surface and ejector sleeve inner tip face fits, bottom inside molding one inner groovy fits with an O-ring seal.
Described syringe head forms inner groovy, and described resilient connection needle stand bottom symmetry is set up the elasticity support claw of at least two profiles and tight engaging corresponding with the inner groovy of syringe head molding, backing pin support in the hollow space between the elasticity support claw is placed.
Inboard, described ejector sleeve middle part forms step.
This utility model compared with prior art has the following advantages: after 1, injection finishes, needle stand cooperates with the low-speed retraction device, resilient connection needle stand springing low-speed retraction device low-speed retraction is to syringe inside under the effect of spring, syringe needle is accommodated in the syringe, it is too fast to have solved the moment retraction speed that exists in the prior art, blood is sprayed in the acupuncture treatment hole by the pressure of human body own, causes the problem of secondary cross infection.2, syringe construction is reasonable, and thrust is light, good reliability, and easy operating is fit to apply.
Description of drawings
Fig. 1 is the cutaway view of this utility model unused state;
Fig. 2 prepares the cutaway view of drawing liquid state for this utility model;
Fig. 3 is the finish cutaway view of state of this utility model drawing liquid;
Fig. 4 pushes away liquid do not begin on earth the to bounce back cutaway view of self-destruction state for this utility model,
Fig. 5 is the cutaway view of this utility model needle retractable self-destruction first step done state;
Fig. 6 is the cutaway view of this utility model needle retractable self-destruction second EOS state
Fig. 7 is for this utility model injection finishes, syringe needle self-destruction the 3rd EOS, and syringe needle begins the cutaway view of retracted state;
Fig. 8 is the cutaway view of this utility model needle retractable to the syringe internal state;
Fig. 9 is Fig. 1 partial enlarged drawing;
Figure 10 is the cutaway view of ejector sleeve;
Figure 11 is the structural representation of handle;
Figure 12 is the cutaway view of backup washer;
Figure 13 is the cutaway view of low-speed retraction support;
Figure 14 is the cutaway view of the low-speed retraction support after being out of shape;
Figure 15 is the cutaway view of needle stand cover
Figure 16 is the cutaway view of resilient connection needle stand
Figure 17 is the cutaway view of the resilient connection needle stand after being out of shape
Figure 18 is the cutaway view of interior backing pin
Figure 19 is the cutaway view of syringe
Figure 20 is the cutaway view of core bar
Figure 21 is the cutaway view of needle stand
The specific embodiment
As shown in Figure 1: this utility model comprises a hollow barrel 1, one is installed in the core bar 2 in the described syringe 1, be installed in the plug 3 of core bar 2 heads, one is installed in the needle stand 4 of described syringe 1 front end, core bar 2 front portions are ejector sleeve 21, as shown in Figure 9: needle stand 4 comprises that the resilient connection needle stand 42 that entry needle is housed reaches the fixedly needle stand cover 41 of resilient connection needle stand 42, resilient connection needle stand 42 and 41 in needle stand cover are provided with spring 44, resilient connection needle stand 42 can break away from described syringe 1 head and bounce back under the effect of spring 44 after pushing away liquid and finishing, core bar 2 front ends are equipped with low-speed retraction device axially corresponding with resilient connection needle stand 42 and that match, this low-speed retraction device bounces back in the syringe described resilient connection needle stand 42 at a slow speed automatically, this low-speed retraction device is fitted by backup washer 23 and low-speed retraction support 24 and constitutes, backup washer 23 works to support low-speed retraction support 24, described low-speed retraction support 24 forms at least two elasticity support claws 242 that cooperate with ejector sleeve 21 inwalls, this elasticity support claw 242 contacts with ejector sleeve 21 inwalls under self elastic force effect and produces frictional resistance, push away liquid finish back resilient connection needle stand 42 retraction and springing low-speed retraction support 24 and backup washer 23 under spring 44 elastic force effects, the elasticity support claw 242 of low-speed retraction support 24 is glided along ejector sleeve 21 inwalls, and resilient connection needle stand 42 arrives ejector sleeve 21 inside together with injection needle restoring.Resilient connection needle stand 42 is not to be at moment retraction, but under the situation that overcomes the frictional resistance between elasticity support claw 242 and ejector sleeve 21 inwalls low-speed retraction.
Below in conjunction with each figure, further describe:
As shown in figure 20, described core bar 2 comprises ejector sleeve 21, handle 22, backup washer 23, low-speed retraction support 24 and O-ring seal 25.
As shown in figure 21, needle stand 4 comprises needle stand cover 41, resilient connection needle stand 42, interior backing pin 43, spring 44 and O-ring seal 45, and there is groove 433 (as shown in figure 18) at interior backing pin 43 middle parts, and needle stand 4 outsides are provided with sheath 5.
As shown in figure 19, the head of described syringe 1 outside forms a boss 11, and inner portion forms inner groovy 12, and the bottom forms a circle 14, outside the circle 14 the big sheath 6 that prevents maloperation is installed, and the bottom inside of syringe 1 forms inner convex platform 13.
As shown in figure 10, described ejector sleeve 21 is a hollow pipe, its top outer forms boss platform 211, inside forms top end face 215, and interior upside forms inner convex platform 212, and the inboard, middle part forms step 213, this step 213 is sloping platform rank or straight step, be provided with step 213 at ejector sleeve 21 middle parts, the internal diameter of ejector sleeve 21 is strengthened, form inclined platform rank 214 in the bottom of ejector sleeve 21.
As shown in figure 11, described handle 22 tops form boss platform 221, closely fasten with inclined platform rank 214 in ejector sleeve 21 bottoms; The middle part forms boss platform 222, its round table surface 224 and ejector sleeve 21 bottom butts, and its bottom symmetrical molding has plural card 223, and the boss 13 with syringe 1 bottom after injection finishes fastens.
As shown in figure 12, described backup washer 23 head molding one gap slot 231, the bottom forms dome circle (236), and upper outside and plug 3 closely cooperate, and the outside, middle part and ejector sleeve endoporus 216 are movingly; The bottom is provided with a boss upper surface 232 and fits with ejector sleeve inner tip face 215; Bottom inside molding one inner groovy 233 fits with an O-ring seal 25; The inner convex platform 2422 of the elasticity support claw 242 of dome circle 236 outsides, bottom and low-speed retraction support 24 is fitted.
As shown in figure 13, one groove 241 is arranged at the top of described low-speed retraction support 24, it and backup washer 23 fit and moving joining, and its bottom outside forms two above elasticity support claws 242, and the boss 212 that its head forms upsides in outside boss platform 2421 and the ejector sleeve 21 is superimposed; This moment, this boss 212 was located elasticity support claw 242 chuckings, and its inboard boss platform 2422 fits with dome circle 236 outsides, backup washer 23 bottom.
As shown in figure 15, described needle stand overlaps 41 inside and sets up top end face 411 and spring 44 upper surface butts, and middle inside sets up middle boss face 412, fits tightly with an O-ring seal 45, inboard middle and lower part forms groove 413, closely cooperates with syringe 1 head outside boss 11.
As shown in figure 16, the bottom symmetry of described resilient connection needle stand 42 is set up two above elasticity support claws 421, the shape in its outside and the inner groovy 12 corresponding and tight engagings of syringe 1 head, the inboard 4213 of elasticity support claw 421 and following endoporus 424 are fitted with the outer wall of interior backing pin 43; A ladder boss 422 is set up at the middle part of resilient connection needle stand 42, and is superimposed with the bottom surface of spring 44; The cylindrical 423 of resilient connection needle stand 42 is joined with spring 44 endoporus are moving, and the last endoporus 425 of resilient connection needle stand 42 cooperates with entry needle.
As Fig. 1,2,3,4,5,6,7 and shown in Figure 8, be the overall process of this utility model use.Wherein Fig. 1 is the cutaway view of unused state, elasticity support claw 242 on the low-speed retraction support 24 is by the inner convex platform 212 chucking location of upsides in the ejector sleeve 21 at this moment, Fig. 2 is for preparing the cutaway view of drawing liquid, the sheath 5 in needle stand 4 outsides and the big sheath 6 of syringe 1 bottom have been removed at this moment, the cutaway view that Fig. 3 finishes for drawing liquid, Fig. 4 pushes away liquid do not begin on earth the to bounce back cutaway view of self-destruction state, the top of the support of low-speed retraction shown in the figure 24 and the bottom of interior backing pin 43 rigidly connect touches, liquid can pass through from the groove 241 of low-speed retraction support 24 heads, and Fig. 5 is the cutaway view of needle retractable self-destruction first step done state; This moment in backing pin 43 by low-speed retraction support 24 push resilient connection needle stand 42 hollow spaces half, the bottom connection of the elasticity support claw 421 on the top of backup washer 23 and the resilient connection needle stand 42 touches preparation and moves next time; Fig. 6 is the cutaway view of the needle retractable self-destruction second EOS state; When continuing to push away liquid forward, backup washer 23 and low-speed retraction support 24 are because of being movingly, low-speed retraction support 24 is pushed ahead again, this moment, backup washer 23 bottom relative motioies arrived the elasticity support claw 242 interior roots of low-speed retraction support 24, make the inner portion of elasticity support claw 242 lose support, 43 of backing pins are pushed into resilient connection needle stand 42 inside fully simultaneously, at this moment elasticity support claw 421 loses support and is out of shape inwards, after the distortion as shown in figure 17, thereby make elasticity support claw 421 break away from the groove 12 that matches with syringe 1 head, elasticity support claw 421 is clamped the head of low-speed retraction support 24, for needle retractable is got ready, Fig. 7 finishes for injection, needle retractable self-destruction the 3rd EOS, and the cutaway view of beginning retracted state.When continuing to push ahead, elasticity support claw 242 inner portion of low-speed retraction support 24 because of lose support stressed be extruded with ejector sleeve 2 in the boss 212 of upsides be separated, the elasticity support claw 242 of low-speed retraction support 24 is deformed into as shown in figure 14 under self elastic force effect subsequently, and conflict with ejector sleeve 21 inwalls, push away liquid and finish, begin retraction.Fig. 8 is the cutaway view of needle retractable to ejector sleeve 21 internal states, when pushing away liquid and finish, resilient connection needle stand 42 springing low-speed retraction supports 24 and backup washer 23 under spring 44 elastic force effects make the elasticity support claw 242 of low-speed retraction support 24 retract to ejector sleeve 21 inside along the downslide of ejector sleeve 21 inwalls.This moment, the elasticity support claw 242 owing to low-speed retraction support 24 was out of shape, elasticity support claw 242 is conflicted with the inwall of ejector sleeve 21 and is cooperated, resilient connection needle stand 42 is not to be to bounce back in moment, but under the frictional resistance that overcomes between elasticity support claw 242 and the ejector sleeve 21 low-speed retraction, when elasticity support claw 242 slides to ejector sleeve 21 middle parts downwards, because of the ejector sleeve middle part is provided with step 213, the internal diameter of ejector sleeve 21 is strengthened, cause the power of compressing of 242 pairs of ejector sleeve 21 inwalls of elasticity support claw to weaken, frictional resistance between elasticity support claw 242 and ejector sleeve 21 inwalls reduces thereupon, match resilient connection needle stand 42 retraction self-destruction smoothly with the spring force that weakens gradually.
The foregoing description is only for the usefulness that this utility model is described, and be not to restriction of the present utility model, the those of ordinary skill in relevant technologies field, under the situation that does not break away from spirit and scope of the present utility model, can also make various variations and modification, so all technical schemes that are equal to also belong to category of the present utility model.
Claims (10)
1, a kind of safe medical syringe with needle capable of automatically retracting, comprise a hollow barrel (1), one is installed in the core bar (2) in the described syringe (1), one is installed in the plug (3) of core bar (2) head, one is installed in the needle stand (4) of described syringe (1) head, described core bar (2) front portion is ejector sleeve (21), it is characterized in that: described needle stand (4) comprises resilient connection needle stand (42) that entry needle is housed and fixing resilient connection needle stand (42)) needle stand cover (41), be provided with spring (44) between described resilient connection needle stand (42) and needle stand cover (41), described resilient connection needle stand (42) can break away from described syringe (1) head and bounce back under the effect of spring (44) after pushing away liquid and finishing, described core bar (2) front end is equipped with low-speed retraction device axially corresponding with resilient connection needle stand (42) and that match, this low-speed retraction device is by backup washer (23) and low-speed retraction support (24) formation that fits, and described low-speed retraction support (24) forms at least two elasticity support claws (242) that cooperate with the forward ejector sleeve of core bar (2) (21) inwall.
2, a kind of safe medical syringe with needle capable of automatically retracting as claimed in claim 1, it is characterized in that: a groove (241) is arranged at the top of described low-speed retraction support (24), described elasticity support claw (242) head forms outside boss platform (2421), the interior upside of described ejector sleeve (21) is provided with boss (212), can be superimposed with the outside boss platform (2421) of elasticity support claw (242) head.
3, a kind of safe medical syringe with needle capable of automatically retracting as claimed in claim 2, it is characterized in that: described backup washer (23) head molding one gap slot (231), the bottom forms dome circle (236), the head of described elasticity support claw (242) forms inboard boss platform (2422), fits with the inner convex platform (2422) of elasticity support claw (242) in bottom dome circle (236) outside of described backup washer (23).
4, a kind of safe medical syringe with needle capable of automatically retracting as claimed in claim 3, it is characterized in that: the upper outside of described backup washer (23) and plug (3) closely cooperate, the endoporus (216) of the outside, middle part and ejector sleeve (21) head movingly, the bottom is provided with a boss upper surface (232) and fits with ejector sleeve (21) inner tip face (215), bottom inside molding one inner groovy (233) fits with an O-ring seal (25).
5, as each described a kind of safe medical syringe with needle capable of automatically retracting of claim 1 to 4, it is characterized in that: described syringe (1) head forms inner groovy (12), described resilient connection needle stand (42) bottom symmetry is set up the elasticity support claw (421) of at least two profiles and tight engaging corresponding with the inner groovy (12) of syringe (1) head molding, backing pin (43) support in the hollow space between elasticity support claw (421) is placed.
6, as each described a kind of safe medical syringe with needle capable of automatically retracting of claim 1 to 4, it is characterized in that: inboard, described ejector sleeve (21) middle part forms step (213).
7, as each described a kind of safe medical syringe with needle capable of automatically retracting of claim 1 to 4, it is characterized in that: the head outside of described syringe (1) forms a boss (11), top (411) and spring (44) upper surface butt are set up in described needle stand cover (41) inside, middle inside sets up middle boss (412), fit tightly with an O-ring seal (45), inboard middle and lower part forms groove (413), closely cooperates with the boss (11) in syringe (1) the head outside.
8, as each described a kind of safe medical syringe with needle capable of automatically retracting of claim 1 to 4, it is characterized in that: a ladder boss (422) is set up at the middle part of described resilient connection needle stand (42), and is superimposed with the bottom surface of spring (44); The cylindrical (423) of resilient connection needle stand (42) is joined with the endoporus of spring (44) is moving, and the last endoporus (425) of resilient connection needle stand (42) cooperates with entry needle.
9, as each described a kind of safe medical syringe with needle capable of automatically retracting of claim 1 to 4, it is characterized in that: the bottom inside of described syringe (1) forms inner convex platform (13), form inclined platform rank (214) in the bottom of described ejector sleeve (21), described ejector sleeve (21) bottom is provided with handle (22), described handle (22) top forms boss platform (221), and the inclined platform rank (214) interior with ejector sleeve (21) bottom closely fasten; The middle part forms boss platform (222), and its round table surface (224) has at least two card (223) with ejector sleeve (21) bottom butt, its bottom symmetrical molding, injects the back that finishes and fastens with syringe (1) bottom inner convex platform (13).
10, as each described a kind of syringe needle automatic retraction safety syringe of claim 1 to 4, it is characterized in that: described syringe (1) bottom forms a circle (14), the outer big sheath (6) that is equipped with of circle (14), described needle stand (4) outside is provided with sheath (5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620102721 CN2889323Y (en) | 2006-04-13 | 2006-04-13 | Safety medical syringe with needle automatically retraction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620102721 CN2889323Y (en) | 2006-04-13 | 2006-04-13 | Safety medical syringe with needle automatically retraction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2889323Y true CN2889323Y (en) | 2007-04-18 |
Family
ID=38019975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620102721 Expired - Lifetime CN2889323Y (en) | 2006-04-13 | 2006-04-13 | Safety medical syringe with needle automatically retraction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2889323Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391554C (en) * | 2006-04-13 | 2008-06-04 | 林作钱 | Safe medical syringe with needle capable of automatically retracting |
| WO2011127750A1 (en) * | 2010-04-14 | 2011-10-20 | 浙江康泰医疗器械有限公司 | Syringe with retracting steel needle |
-
2006
- 2006-04-13 CN CN 200620102721 patent/CN2889323Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100391554C (en) * | 2006-04-13 | 2008-06-04 | 林作钱 | Safe medical syringe with needle capable of automatically retracting |
| WO2011127750A1 (en) * | 2010-04-14 | 2011-10-20 | 浙江康泰医疗器械有限公司 | Syringe with retracting steel needle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20080604 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |