CN101850144B - Safe self-destructive injector - Google Patents
Safe self-destructive injector Download PDFInfo
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- CN101850144B CN101850144B CN2010102020779A CN201010202077A CN101850144B CN 101850144 B CN101850144 B CN 101850144B CN 2010102020779 A CN2010102020779 A CN 2010102020779A CN 201010202077 A CN201010202077 A CN 201010202077A CN 101850144 B CN101850144 B CN 101850144B
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- convex body
- needle holder
- keeper
- injection
- syringe
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- 238000002347 injection Methods 0.000 claims abstract description 95
- 239000007924 injection Substances 0.000 claims abstract description 95
- 238000000034 method Methods 0.000 abstract description 13
- 239000007788 liquid Substances 0.000 description 7
- 210000000078 claw Anatomy 0.000 description 6
- 230000000694 effects Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005452 bending Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 206010011409 Cross infection Diseases 0.000 description 1
- 206010029803 Nosocomial infection Diseases 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000003612 virological effect Effects 0.000 description 1
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Abstract
The invention provides a safe self-destructive injector, belonging to the technical field of medical instruments. The invention solves the problem that patients feel pain when a doctor injects the patients by using the conventional injector. The safe self-destructive injector comprises a syringe, an injection rod, a rubber plug and a cylindrical needle head base, wherein the rubber plug is fixedly connected to the front part of the injection rod; the needle head base is connected to the inner side of the front end of the syringe; the front part of the injection rod is provided with a rod head passing through the rubber plug and extending out of the rubber plug; the end part of the rod head is provided with a positioning piece; the inner wall of the needle head base is provided with a convex body; a clamping structure is arranged between the rod head positioning piece and the convex body; and the positioning piece can prevent the rod head from withdrawing the needle head base through the convex body by using the elasticity of the positioning piece or the convex body when the rod head is inserted into the needle head base. The safe self-destructive injector has the advantages of reasonable design, effective relief of the pain of the patients in the operation process and the like.
Description
Technical field
The invention belongs to technical field of medical instruments, relate to a kind of syringe, particularly a kind of safety self-destructing syringe.
Background technology
Cause viral cross infection for fear of using antihygienic syringe, disposable syringe is widely used in medical field.But common disposable syringe does not have the technical measures that can only use once and not by utilizing again, make secondary to occur free can the boring of the not really regular individual medical clinic of some medical institutions, particularly minority and use, even the phenomenon that is repeatedly used.For this reason, on push rod, be provided with the shackle member that engages with syringe when people design syringe,, make push-rod lock in syringe, can not reuse, thereby reach the purpose of self-destruction when the injection rear push-rod that finishes engages with syringe.But this type syringe at drawing liquid secondary piston front end not on zero line; Therefore during drawing liquid uses, cause drawing liquid dosage nonstandard on the one hand, make that on the other hand the air in the syringe was residual not more when syringe used; It is more that the push rod head of this type syringe exceeds plug; When drawing liquid, can produce the difficult discharge of bubble, have injection residual after this type injector to inject finishes in addition, can not reach the standard of low-residual at the plug top.
In view of the existence of more above-mentioned problems, people can make syringe needle be contracted in the injection tube and the self-destruction syringe of low-residual through improving structure, having designed.For example, Chinese patent discloses a kind of low-residual safe self-destructing injector [publication number is: CN101444649A], comprises the push rod that a hollow barrel, slides in syringe, the plug that is installed in the push rod front end; The front end of syringe is equipped with needle stand; Needle stand is supported by supporting seat, and the supporting seat inboard is provided with elastic card claw, and the push rod front end is provided with the frustum that engages with elastic card claw after injection finishes; When not injecting at the bottom of the awl of said frustum with plug top butt; Plug is a hollow type, and push rod is provided with the block of pushing and pressing plug, and plug receives the counteracting force of injection generation and the thrust compressive deformation of block during injection; This moment the push rod front end frustum along axially the protracting of push rod, the injection back frustum that finishes can engage with elastic card claw.
But the syringe of this class formation is not too rational when safety self-destruct.In such scheme; Because elastic card claw is arranged on the supporting seat inboard; When the injection rear push-rod that finishes might only retract supporting base in the injection tube, needle stand and syringe needle then are retained in the injection tube front end, and the staff can be by needle sting when these discarded syringes of processing.Moreover; This syringe in use is that the push rod front end contacts with elastic card claw earlier; Be only then that plug contacts with the syringe end; Just entered into the stage of safety self-destruct like this at injection when also injection does not finish fully, owing to the pressure that inputs to the patient changes suddenly, made the patient feel very pain during this period.At last,, can cause the residual of the interior injection of syringe like this, make it be injected to the intravital dose of people and reduce, not reach the purpose of treatment owing to be that the push rod front end contacts with elastic card claw earlier.
Summary of the invention
The objective of the invention is to have the problems referred to above to existing technology, proposed a kind of reasonable in design and in operating process, can effectively alleviate the safety self-destructing syringe of patient's pain.
The object of the invention can be realized through following technical proposal:
A kind of safety self-destructing syringe; Comprise injection tube, injection rod, rubber stopper and be needle holder cylindraceous, described rubber stopper is connected in the front portion of injection rod, and above-mentioned needle holder is connected the front end inboard of said injection tube; It is characterized in that; The front portion of said injection rod has the bar head that passes rubber stopper and stretch out rubber stopper, and described rod head end portion has keeper, and said needle holder inwall is provided with convex body; Have interface arrangment between bar head keeper and the convex body, and utilize the elasticity of keeper self or convex body and can prevent that through convex body the stopping bar head withdraws from needle holder when the bar head is inserted into keeper above-mentioned in the needle holder.
When the safety self-destruction syringe in use was not inserted in the needle holder as if the bar head, injection rod can move forward and backward in injection tube, realizes drawing liquid and injection.In the injection process, when the bar head is inserted in the needle holder, consider that this syringe can only once use; When the rubber stopper end is resisted against the injection tube inner terminal; When this moment, keeper just abutted on the convex body, medical personnel continued injection rod is promoted to injection direction, because rubber stopper has elasticity; This moment, rubber stopper was extruded and keeper continues to move forward, keeper or convex body bending in the moving process.After keeper passed through convex body, the keeper or the convex body of bending resetted under the effect of elastic force, and the back keeper that resets is stopped by convex body, forces keeper to be connected in the needle holder, and people are very difficult things if want to make injection rod to withdraw from needle holder.The inboard interference fit of the outside of needle holder one end and the front end of injection tube; Frictional force between the two is just greater than the pressure that produces in the injection process; But the power when in keeper snaps fit onto needle holder, needle holder being retracted is arranged on like this in the injection process and the seepage phenomenon can occur between the needle holder and injection tube, when the needs self-destruction, also can needle holder be withdrawn in the injection tube; In the time of in needle holder is pulled back to injection tube, injection rod is fractureed realize the purpose of self-destruction.
This interface arrangment is to realize clamping like this: when keeper under the elastic force effect through behind the convex body; Because keeper or convex body need return to original state; Cause keeper to be stopped by convex body after the recovery, thereby can't pass through convex body, keeper can only abut on the convex body during pulling injection rod.In order to realize that keeper is stopped, then to the minimum range of needle holder axis, and convex body is to the minimum range of the needle holder axis radius greater than the bar head greater than convex body for the radius of keeper maximum cross section.
Keeper is for having spigot surface, and keeper can be shapes such as circular cone, round platform here, and the big end and the bar head of keeper are fixed together, when small end is used for through convex body the guiding and with convex body against.
In above-mentioned safety self-destructing syringe, described interface arrangment is several rubber-like convex bodys, all has the inclined-plane that tilts to needle holder the place ahead by along the needle holder sidewall on described each convex body.
The purpose of setting is like this, when keeper will pass through convex body, and the joint, inclined-plane of keeper and convex body, because convex body has elasticity, then the inclined-plane of convex body expands outwardly under the extruding of keeper, makes things convenient for passing through of keeper.When keeper when the convex body, convex body returns to original state under self elastic force, when this moment, keeper pushed convex body again, convex body then can not expand outwardly, convex body has stopped keeper thus, makes keeper by clamping.Convex body is set to several, has more effectively stoped convex body, makes self-destruction be more prone to realize.
In above-mentioned safety self-destructing syringe, described convex body in the form of sheets.
Convex body in the form of sheets has better elasticity, and when keeper abutted on the convex body, convex body expanded outwardly easily, makes keeper better pass through convex body.
In above-mentioned safety self-destructing syringe, described keeper comprises that being positioned at its front portion is conical excessive portion and is positioned at its rear portion and is conical jam portion, and excessively portion links to each other with jam portion big longitudinal end, and excessive portion, jam portion and injection rod concentric.
In above-mentioned safety self-destructing syringe, the described keeper outside has the external screw thread that is extended to excessive portion by jam portion.
Keeper is inserted in the needle holder when injection has been injected; In order to alleviate,, make keeper under the convex body elastic reaction, cross convex body injection rod precession needle holder at the arranged outside external screw thread of keeper by injector's pain; In the process of injection rod rotation, convex body matches with external screw thread.Keeper comprises excessive portion and jam portion, be provided with so convenient externally threaded excessively, the final purpose that realizes is to make convex body smoothly through jam portion and excessive portion.
In above-mentioned safety self-destructing syringe, described external screw thread extends to the excessive portion outside by the bar head outside, the jam portion outside successively.
Just inject when finishing when the injection in the injection tube, above-mentioned convex body just is positioned at the externally threaded end that is arranged on the keeper.Rotate injection rod around a direction during self-destruction, make the bar head and the convex body threaded engagement of injection rod, this moment, injection rod produced operating range with respect to rubber stopper under the rubber stopper elastic reaction.When convex body was crossed by excessive portion, convex body can be resisted against in the jam portion, and under the effect of screw thread, was difficult to the bar head is extracted in needle holder, and the pulling needle holder reached purpose safe in utilization when injection rod was stirred to injection tube.
In above-mentioned safety self-destructing syringe, described convex body is at least two and convex body along the needle holder axial distribution, and two adjacent convex bodys stagger along the needle holder radial position.
It is in order can better to prevent that keeper from being stopped by convex body when the keeper clamping, to be unlikely to during the rotary injection bar keeper is pulled out in needle holder that convex body is at least two, but pulls out together positioning seat is whole.Convex body is provided with when keeper passes through convex body along the needle holder axial distribution like this, contacts with a convex body earlier, through contacting with second convex body behind the convex body again.Keeper radially staggers and is arranged in the needle holder, avoids all convex bodys all to be positioned at the same side of needle holder, prevents that injection rod from retracting in the process because the needle holder unbalance stress causes the result that can not needle holder be pulled out.
In above-mentioned safety self-destructing syringe, described convex body is 2-4.
Guaranteeing to be stopped effectively by convex body that keeper can be chosen the quantity of one group of number as self wantonly under the situation that also can needle holder be retracted in the array of 2-4 after keeper is through convex body.Consider the processing situation of economic conditions and needle holder, convex body is set to 4 at most; Consider can effectively be greater than the frictional force between needle holder and the injection tube by the power that convex body stops and convex body bears when retracting injection rod after keeper is through convex body, the number that convex body is minimum is decided to be 2.
In above-mentioned safety self-destructing syringe, described convex body is 2.
The preferred version of convex body is 2, and 2 convex bodys lay respectively on the relative bus along needle holder axial distribution and 2 convex bodys.
In above-mentioned safety self-destructing syringe, described injection rod is provided with some baffle rings, has on the said rubber stopper and the corresponding annular groove of baffle ring.
During assembling, the annular groove on the baffle ring on the injection rod and the plug forms and cooperates, makes being connected firmly of injection rod and plug, make inject and the drawing liquid process more stable.
Compared with prior art, the safety self-destruction syringe has the following advantages:
1, convex body is set directly on the needle holder in the safety self-destruction syringe, and needle holder is easy to be pulled in the injection tube under the situation that convex body can effectively stop keeper, and the effect of self-destruction is more obvious.
2, the bar head is provided with the external screw thread that is extended to excessive portion by jam portion, in the injection injection finishes the process that is realizing safety self-destruct, can alleviate by injector's pain.
3, the safety self-destruction syringe can just realized safety self-destruct after being extracted by injector's health, has avoided the influence that human body is produced because of self-destruction fully.
Description of drawings
Fig. 1 is the structural representation of safety self-destruction syringe.
Fig. 2 is the structural representation of another state of safety self-destruction syringe.
Fig. 3 is the structural representation of the needle holder that provides of embodiment one.
Fig. 4 is the structural representation of the needle holder that provides of embodiment two.
Fig. 5 is the partial enlarged drawing at A place among Fig. 1.
Fig. 6 is the structural representation of rubber stopper in the safety self-destruction syringe.
Among the figure, 1, injection tube; 2, injection rod; 21, bar head; 22, keeper; 22a, excessive portion; 22b, jam portion; 23, baffle ring; 3, rubber stopper; 31, annular groove; 4, needle holder; 41, convex body; 41a, inclined-plane; 5, external screw thread.
The specific embodiment
Below be specific embodiment of the present invention and combine accompanying drawing, technical scheme of the present invention is done further to describe, but the present invention is not limited to these embodiment.
Embodiment one
As depicted in figs. 1 and 2; The safety self-destruction syringe; Comprise injection tube 1, injection rod 2, rubber stopper 3 and be needle holder 4 cylindraceous, the outside interference fit of needle holder 4 one ends is inboard in the front end of injection tube 1, and needle holder 4 and injection tube 1 frictional force between the two are just greater than the pressure that produces in the injection process; Be arranged on like this in the injection process and the seepage phenomenon can not occur between the needle holder 4 and injection tube 1, when the needs self-destruction, also can needle holder 4 be withdrawn in the injection tube 1.Injection rod 2 front ends are provided with some baffle rings 23, and are as shown in Figure 6, have on the rubber stopper 3 and baffle ring 23 corresponding annular grooves 31, and assembling snaps fit onto the annular groove on the rubber stopper 3 31 on the baffle ring 23 of injection rod 2 during syringe and reaches being connected of rubber stopper 3.The front portion of injection rod 2 has the bar head 21 that passes rubber stopper 3 and stretch out rubber stopper 3, and the end of bar head 21 has keeper 22.As shown in Figure 5, keeper 22 comprises that being positioned at its front portion is the conical excessive 22a of portion and is positioned at its rear portion and is the conical jam 22b of portion, and excessively the 22a of portion links to each other with the jam portion big longitudinal end of 22b, and the excessive 22a of portion, the 22b of jam portion and injection rod 2 concentrics.One end and the bar head 21 of keeper 22 are fixed together.Keeper 22 outsides have the external screw thread 5 that is extended to the excessive 22a of portion by the 22b of jam portion, and external screw thread 5 extends to the excessive 22a of the portion outside by bar head 21 outsides, the 22b of the jam portion outside successively.
As shown in Figure 3, the inwall of needle holder 4 is provided with some have elasticity and convex bodys in the form of sheets 41, and convex body 41 in the form of sheets has better elasticity; When keeper 22 abuts to 41 last times of convex body; Convex body 41 expands outwardly easily, makes keeper 22 better through convex body 41, alleviates patient's pain.According to specific circumstances, convex body 41 can be set to 2-4, in the present embodiment is 2, and 2 convex bodys 41 lay respectively on the relative bus along needle holder 4 axial distribution and 2 convex bodys 41.All have an inclined-plane 41a along the inclination of needle holder 4 the place aheads on each convex body 41, convex body 41 is along needle holder 4 axial distribution.
In order to realize that keeper 22 is stopped, the radius of keeper 22 maximum cross sections is greater than the minimum range of convex body 41 to needle holder 4 axis, and convex body 41 arrives the radius of the minimum range of needle holder 4 axis greater than bar head 21.Just inject when finishing when the injection in the injection tube 1, above-mentioned convex body 41 just is positioned at the end of the external screw thread 5 that is arranged on the keeper 22.
When the safety self-destruction syringe in use was not inserted in the needle holder 4 as if bar head 21, injection rod 2 can move forward and backward in injection tube 1, realizes drawing liquid and injection.In the injection process; Realize like this self-destruction during the safety self-destruction syringe: when bar head 21 is inserted in the needle holder 4; Owing to consider that this syringe can only once use, rubber stopper 3 just abuts on the end of injection tube 1 when the injection injection finishes, and is as shown in Figure 1; This moment, convex body 41 just was positioned at the end of the external screw thread 5 that is arranged on the keeper 22, then with syringe needle from being extracted in injector's health.The characteristics of this syringe can just realize self-destruction when being extracted in injector's health with syringe, have when self-destroyed syringe not to being exerted an influence by the injector.After syringe needle was extracted in the human body, medical personnel's rotary injection bar 2 can form convex body 41 with external screw thread 5 and cooperate, and this moment, injection rod 2 with respect to rubber stopper 3 generation operating ranges, was connected to keeper 22 in the needle holder 4 under rubber stopper 3 elastic reactions.When keeper 22 firm be connected in the needle holder 4 time, pulling injection rod 2 is withdrawn into needle holder 4 in the injection tube 1 together, then injection rod 2 is fractureed, and realizes the self-destruction of syringe.
Embodiment two
The structural principle of present embodiment is basic identical with the structural principle of embodiment one; Different places are; As shown in Figure 4, the inwall of needle holder 4 is provided with 3 and has elasticity and 41,3 convex bodys 41 of convex body in the form of sheets stagger in radial position; 2 convex bodys 41 are positioned on the bus of needle holder 4, and another convex body 41 be positioned at above-mentioned bus corresponding bus lines on.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as injection tube 1, injection rod 2, bar head 21, keeper 22, the excessive 22a of portion, the 22b of jam portion, baffle ring 23, rubber stopper 3, annular groove 31, needle holder 4, convex body 41, inclined-plane 41a, external screw thread 5 morely, do not get rid of the probability of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; It all is contrary with spirit of the present invention being construed to any additional restriction to them.
Claims (6)
1. safety self-destructing syringe; Comprise injection tube (1), injection rod (2), rubber stopper (3) and be needle holder cylindraceous (4), described rubber stopper (3) is connected in the front portion of injection rod (2), and above-mentioned needle holder (4) is connected the front end inboard of said injection tube (1); The front portion of said injection rod (2) has the bar head (21) that passes rubber stopper (3) and stretch out rubber stopper (3); Described bar head (21) end has keeper (22), and said needle holder (4) inwall is provided with convex body (41), has interface arrangment between bar head (21) keeper (22) and the convex body (41); And when bar head (21) is inserted in the needle holder (4); Above-mentioned keeper (22) forms clamping with convex body (41), and anti-stopping bar head (21) withdraws from needle holder (4), and described interface arrangment is several rubber-like convex bodys (41); All has the inclined-plane (41a) that tilts to needle holder (4) the place ahead by along needle holder (4) sidewall on described each convex body (41); Described convex body (41) in the form of sheets, described keeper (22) comprises that being positioned at its front portion is conical excessive portion (22a) and is positioned at its rear portion and be conical jam portion (22b), excessively portion (22a) and jam portion (22b) greatly longitudinal end link to each other; And excessively portion (22a), jam portion (22b) and injection rod (2) concentric have the external screw thread (5) that is extended to excessive portion (22a) by jam portion (22b) outside the described keeper (22).
2. safety self-destructing syringe according to claim 1 is characterized in that, described external screw thread (5) extends to excessive portion (22a) outside by bar head (21) outside, jam portion (22b) outside successively.
3. safety self-destructing syringe according to claim 1 is characterized in that, described convex body (41) is at least two and convex body (41) along needle holder (4) axial distribution, and adjacent two convex bodys (41) stagger along needle holder (4) radial position.
4. safety self-destructing syringe according to claim 3 is characterized in that, described convex body (41) is 2-4.
5. safety self-destructing syringe according to claim 4 is characterized in that, described convex body (41) is 2.
6. safety self-destructing syringe according to claim 1 is characterized in that, described injection rod (2) is provided with some baffle rings (23), has on the said rubber stopper (3) and the corresponding annular groove of baffle ring (23) (31).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102020779A CN101850144B (en) | 2010-06-18 | 2010-06-18 | Safe self-destructive injector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010102020779A CN101850144B (en) | 2010-06-18 | 2010-06-18 | Safe self-destructive injector |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101850144A CN101850144A (en) | 2010-10-06 |
| CN101850144B true CN101850144B (en) | 2012-07-25 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010102020779A Expired - Fee Related CN101850144B (en) | 2010-06-18 | 2010-06-18 | Safe self-destructive injector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101850144B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103638582B (en) | 2013-12-25 | 2015-09-30 | 徐雪花 | The syndeton of needle holder and syringe in a kind of safety injector |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352994A (en) * | 2000-11-09 | 2002-06-12 | 罗正己 | Safety injector with easily detachable push rod |
| CN2808184Y (en) * | 2005-01-10 | 2006-08-23 | 邹纯平 | Self-destroyed safety syringe |
| GB2435213A (en) * | 2005-07-28 | 2007-08-22 | Acxing Ind Co Ltd | Disposable safety syringe with retractable needle |
| CN101347648A (en) * | 2008-05-22 | 2009-01-21 | 林作钱 | Self-locking type self-breaking syringe |
| CN101444649A (en) * | 2008-12-30 | 2009-06-03 | 林作钱 | Low-residual safe self-destructing injector |
| CN101862492A (en) * | 2010-05-27 | 2010-10-20 | 郑德夫 | Safety self-destruction syringe |
-
2010
- 2010-06-18 CN CN2010102020779A patent/CN101850144B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1352994A (en) * | 2000-11-09 | 2002-06-12 | 罗正己 | Safety injector with easily detachable push rod |
| CN2808184Y (en) * | 2005-01-10 | 2006-08-23 | 邹纯平 | Self-destroyed safety syringe |
| GB2435213A (en) * | 2005-07-28 | 2007-08-22 | Acxing Ind Co Ltd | Disposable safety syringe with retractable needle |
| CN101347648A (en) * | 2008-05-22 | 2009-01-21 | 林作钱 | Self-locking type self-breaking syringe |
| CN101444649A (en) * | 2008-12-30 | 2009-06-03 | 林作钱 | Low-residual safe self-destructing injector |
| CN101862492A (en) * | 2010-05-27 | 2010-10-20 | 郑德夫 | Safety self-destruction syringe |
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| Publication number | Publication date |
|---|---|
| CN101850144A (en) | 2010-10-06 |
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Owner name: XU XUEHUA Free format text: FORMER OWNER: ZHENG DEFU Effective date: 20110928 |
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Effective date of registration: 20110928 Address after: Taizhou City, Zhejiang Province, 317605 West Street, Yuhuan County Town, No. 64 Truman Applicant after: Xu Xuehua Address before: 317606, No. 65, Zhu Jia village, Taizhou Town, Yuhuan County, Zhejiang Applicant before: Zheng Defu |
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Effective date of registration: 20170629 Address after: 200082, No. 107, 109, 128, 111 and 112, building 10, Xiang Yin Road, Shanghai, Yangpu District Patentee after: Ethan medical science and Technology (Shanghai) Co., Ltd. Address before: Taizhou City, Zhejiang Province, 317605 West Street, Yuhuan County Town, No. 64 Truman Patentee before: Xu Xuehua |
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