CN101357245B

CN101357245B - Safety syringe with secondary re-journey

Info

Publication number: CN101357245B
Application number: CN200810141122A
Authority: CN
Inventors: 张亚根; 王冬梅; 范汉杰; 李平
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-08-26
Filing date: 2008-08-26
Publication date: 2012-10-03
Anticipated expiration: 2028-08-26
Also published as: CN101357245A

Abstract

The invention consists of an outer tube, a rubber stopper, a core bar and a push bar. The core bar is arranged in a taper hole of the push bar, and the first section of the core bar passes through the rubber stopper and projects downwards; the rubber stopper is arranged outside the lower part of the push bar; a multi-leave protrusion part is positioned in an inner hole of a cone joint arranged on the outer tube; the core bar and the rubber stopper can move up and down in the outer tube along with the push bar; during application, when liquor is totally injected and the lower end face of the rubber stopper contacts with the bottom face of the inner cavity of the outer tube, the push bar is pressed, thus compression deformation occurs to the rubber stopper; when the push bar runs downwards, the first section of the core bar is interlocked with the multi-leave protrusion part; when the pressure is removed, the rubber stopper pushes the push bar upwards and returns thereof by self-performance; the core bar is interlocked with the outer tube and repositioned when the position of the core bar changes corresponding to the push bar; when the push bar is pressed again, the core bar moves downwards along with the push bar from the position where the core bar is interlocked with the outer tube, and a second travel is realized to execute other desired actions, such as triggering protection action of a safe injection needle, etc.

Description

Safety injector with secondary re-journey

Technical field

The present invention relates to a kind of medical syringe tool, particularly a kind of safety injector with secondary re-journey.

Background technology

Safety injector with secondary re-journey of the present invention mainly is meant the instrument used for injection that is used for medical purpose, and it relates to our various syringes used in everyday.Syringe is can medicinal liquid be drawn into container and injection tool in its inner chamber, and injects (puncture) pin, then is to puncture and set up the instrument of medicinal liquid infusion channel to the injection site.The two cooperates the common function of injection of realizing medicinal liquid.They are bringing into play enormous function in the process of human clinic diagnosis disease.Be that utensil is used in indispensable treatment.But; Along with the variation of nature advancing of disease with virus, antibacterial; Cross infection and the pathophoresis that takes place with blood or body fluid contact is on the rise, and (as: drug addict causes the bamboo telegraph of disease to the common or repeated use of instrument used for injection, is exactly in addition in daily medical act; Entry needle is also very serious to the nosocomial infection of medical personnel's pricking wound initiation, even causes transmissions of disease such as AIDS, hepatitis B, hepatitis C).The disposable strict demand of instrument used for injection has been risen to the laws and regulations requirement of various countries.And The World Health Organization (WHO) has also strictly regulated the safety injection three elements: 1, harmless to user; 2, harmless to receiver (patient); 3, environmental sound; At present; Clinical use be mostly ordinary syringe or passive security syringe; After completion is expelled to the intravital purpose of people with medicine; Can not realize the automatically damaging shape (exist reusable maybe) of syringe or through pulling back push rod and it is fractureed and passive unmaking (increase operating procedure), and entry needle can not hide after use, have the risk of stabbing medical personnel or waste disposal personnel; For this reason; The scientific worker has carried out number of research projects; The technical scheme of a large amount of safety injectors is disclosed; But majority exists such or such deficiency, and promoting the use of of safety injector is severely limited, and the paces that present safety injector is promoted the use of at home are very slow.In part safety injector patent, the overwhelming majority utilizes the latch structure of injector push-rod front end surplus Patent Office of the People's Republic of China disclosed 200, medicinal liquid inject finish after; Dependency structure interlocking with injecting needle base; Form to connect, again with manual type with the entry needle pull from moving back, in the indentation syringe cylinder, protecting; And then implement manual fractureing to injector push-rod, syringe is unmake.Mostly be the mode of protecting in the entry needle indentation syringe cylinder.Its deficiency is:

1, the self-destruction of syringe realizes it being passive;

2, when the protection scheme that uses entry needle pull re-injection love dart urceolus; To note constantly and can not push rod be pressed to the end in the process of taking out medicine and eliminating gas of syringe before injection; Otherwise will make syringe that self-destruction takes place before treatment, and can not realize its predetermined work;

3, complex structure, it is alternative to cause the different security syringe part not exchange each other, has increased enterprise's manufacturing cost;

4, because structural deficiency, make product use habit and clinical injection rule of operation inconsistent, make the operation sequence increase, use loaded down with trivial detailsly, medical personnel can not accept, and product is out of favour etc.

More than many factors, all cause above-mentioned safety injector product on market, to be difficult to promote and promote situation slowly.The safety self-destruct product of China's disposable medical instrument used for injection is interfered on using and promoting, and country and enterprise are difficult to existing resources is fully effectively used on safe and reliable, good and cheap, easy to manufacture, as to meet clinical medical and nursing injection operation routine and the use habit disposible safety syringe tool.

I disclose the technical scheme of the safe injection needle of a kind of disposable safety injector with active self-destroying function that can satisfy above-mentioned requirements and active self-destroying function in the CN101099876A patent; But its syringe is owing to only there is the stroke design again; And do not have the secondary re-journey structure, so the protection of easy erroneous trigger safe injection needle action when injection liquid finishes.For this reason, the present invention proposes a kind of safety injector with secondary re-journey to solve above-mentioned various deficiency.

Summary of the invention

Safety injector with secondary re-journey of the present invention is made up of urceolus, plug, core bar and push rod.Core bar places the taper hole on the push rod, and first section first sector hole that passes on the plug of core bar is outstanding downwards; Plug places outside, push rod bottom; In 6% Rule cone joint endoporus of urceolus bottom the bossy body that is the multi-petal shape formula is arranged; Core bar and plug can move up and down in the inner chamber of urceolus with push rod.

Safety injector with secondary re-journey of the present invention is characterized in that: plug has the cylinder of four sector holes for inner center.From bottom to top: first sector hole is isometrical circular hole, and its diameter is slightly less than the diameter of second section of core bar; Second sector hole is isometrical circular hole, and its diameter is greater than the maximum gauge of the 4th section of core bar; The 3rd sector hole is isometrical circular hole, and its diameter equals the diameter of first section of push rod bottom, and its hole depth is consistent with the height of first section of push rod bottom; The 4th sector hole is isometrical circular hole, and its diameter equals the diameter of second section of push rod bottom, and its hole depth equals the height of second section of push rod bottom;

Safety injector with secondary re-journey of the present invention is characterized in that: core bar is three sections round platforms and three sections cylinders that cylinder is formed.From bottom to top: first section is the little down big round platform of; Second section is cylinder, and its diameter is consistent with first section lower end diameter; The 3rd section is the big down little round platform of, and its lower end diameter is consistent with second section diameter; The 4th section is the little down big round platform of, and its lower end diameter is not less than second section cylindrical diameter; The 5th section is cylinder, and its diameter is consistent with the 4th section lower end diameter; The 6th section is cylinder, and the through hole width on second section of its diameter and the push rod bottom is consistent;

Safety injector with secondary re-journey of the present invention is characterized in that: the push rod bottom is three sections waney cylinders.From bottom to top: first section diameter greater than second section diameter less than the 3rd section diameter; Second section both sides, upper end are jagged respectively, the center has through hole, through hole height to equal the height of the 6th section of core bar, and the width of through hole is consistent with the diameter of the 6th section of core bar; It between breach and the through hole thin-walled form; First and second section center have a slit upwards with second section on through hole link to each other, first and second section cylinder is divided into two lobes, this two lobe can be respectively is that appropriate folding is done in the center of circle with breach and the thin-walled between the through hole on second section; There are two sections circular ports the cylindrical center of first and second section.From bottom to top: following sector hole is the little down big taper hole of, and its size be able to hold the 4th section of core bar; Last sector hole is isometrical circular hole, and the lower end diameter of its diameter and hypomere taper hole is consistent and greater than the through hole width on second section cylinder, and be able to hold the 5th section cylinder of core bar;

Safety injector with secondary re-journey of the present invention is characterized in that: in 6% Rule cone joint endoporus of urceolus bottom the bossy body that is the multi-petal shape formula is arranged.Its diameter of bore is slightly larger than the maximum gauge of first section of core bar; The distance of bossy body to inner chamber body equals the height of first section of core bar; Minimum diameter after many lobes bossy body surrounds equals the diameter of second section of core bar;

Safety injector with secondary re-journey of the present invention is characterized in that: first section of core bar can penetrate in 6% Rule cone joint endoporus of urceolus bottom under external force, and with its on the bossy body interlocking; Plug during inner cavity, (promptly continues the compressing push rod) under the effect of external force at the bottom of moving to urceolus, vertically compression to be satisfying the requirement of stroke again of syringe, and when external force is cancelled, and plug relies on the performance of self can make the push rod answer that makes progress; When plug was upwards replied, because first section of core bar with bossy body on the urceolus interlocking taken place, core bar will be with upwards answer of push rod, and deviates from the taper hole from push rod, the upper surface of the 4th section of core bar is contacted with the lower surface of push rod and locatees; The push rod hypomere is two lobe forms, when deviating from the taper hole of core bar from push rod, can appropriateness open; Plug is housed on the push rod, and after the taper hole of core bar from push rod, deviating from, because the effect of plug, two lobes of push rod hypomere close up rapidly, core bar can not be got in the taper hole on the push rod for the 4th section once more, and reorientate;

Safety injector with secondary re-journey of the present invention; It is characterized in that: after first section of core bar and bossy body generation interlocking, push rod on the urceolus are upwards replied; Once more plug is applied external force (promptly oppressing push rod once more); Plug is vertically compression once more also, and core bar will move (being secondary re-journey) downwards with push rod once more from the interlocking position beginning with urceolus simultaneously;

Safety injector with secondary re-journey of the present invention; It is characterized in that: after first section of core bar and bossy body generation interlocking, push rod on the urceolus are upwards replied; If pull push rod by force; Because plug is to the restriction of the 4th section of core bar, core bar will rupture at its light section place of the 3rd section, first, second and third section of core bar often stayed in the endoporus of 6% Rule cone joint of urceolus bottom make syringe can not be repeated use;

Safety injector with secondary re-journey of the present invention; It is characterized in that: the safety injector with secondary re-journey of the present invention; Safeguard protection to syringe is when injection finishes, to continue compressing push rod descending (stroke again); First section of core bar got in 6% Rule cone joint endoporus of urceolus bottom, realize with bossy body generation interlocking on it; And this again stroke only can realize safeguard protection (self-destroying function) and little residualization of liquid medicine injection to syringe; Afterwards, repress is compeled push rod makes it descending, and the link position of core bar and push rod changes owing to this moment, so core bar will move (being secondary re-journey) downwards with push rod once more from the interlocking position beginning with urceolus; In order to carrying out other expection actions, like the protection action that triggers safe injection needle etc.

Owing to adopted technique scheme; Make the present invention satisfy the design philosophy that the device pin separates, unmakes respectively; Make the structure of active self-destroyed syringe that the variation of essence take place, under the situation that does not change clinical use habit, realized the active design of the safety self-destruct of syringe.Particularly the structural design of secondary re-journey of the present invention has broken through the technical scheme of all existing safety injectors.Safety injector with secondary re-journey of the present invention, its safety is higher, and is easy to use, and meets clinical use working specification.

Safety injector with secondary re-journey of the present invention, since the design philosophy that has adopted the device pin to separate, unmake respectively, and the expected design of the satisfied recycling of the syringe after the use (because: syringe has only contacted medicinal liquid in clinical); Meet the Treatment of Medical ' Waste program; More meet national related medical offal treatment rules requirement (because: the syringe after the use is through certain processing, and its waste material can be recycled, and entry needle; Behind contact tissue of patient, the blood; Belong to and want the strict danger wastes of handling sterilization, there are special legal provisions in country, requires concrete management).So application of the present invention meets the national policy of energy-saving and emission-reduction.The recycling of instrument used for injection will be a wealth leaving society for.

Description of drawings

Fig. 1 is that structure of the present invention is launched sketch map.

Fig. 2 is combinative structure of the present invention (when not using and in use, medicinal liquid being injected when a finishing) sketch map.

To be the present invention at medicinal liquid inject Fig. 3 continues the compressing push rod when finishing and realize the unmake structural representation of (stroke again) of syringe.

Fig. 4 is the structural representation of the present invention when realizing that syringe unmakes push rod answer (again behind the stroke).

Fig. 5 is the structural representation of the present invention when realizing oppressing push rod (secondary re-journey) once more after syringe unmakes.

The specific embodiment

Can be known by Fig. 1: the present invention is made up of urceolus 1, plug 2, core bar 3 and push rod 4.

Can be known by Fig. 2: core bar 3 places the taper hole 4f on the push rod 4, and the first sector hole 2a that first section 3a of core bar passes on the plug 2 is outstanding downwards; Plug 2, core bar 3 can move up and down in the inner chamber of urceolus 1 with push rod 4; During product export and in use medicinal liquid is injected when finishing, the lower surface of plug 2 contacts with the inner chamber bottom surface of urceolus 1.At this moment, plug 2 is not compressed, and first section 3a of core bar gets among the endoporus 1b of urceolus 1, do not have interlocking with urceolus 1.

Can be known by Fig. 3: the present invention injects when continuing compressing push rod 4 when finishing and realizing that syringes unmake (stroke again) at medicinal liquid; Compression takes place in plug 2; Push rod 4 is realized downward stroke again, and first section 3a of core bar is through bossy body 1a among the endoporus 1b of urceolus 1 and interlocking with it.

Can be known by Fig. 4: the present invention is when realizing that syringe unmakes 4 answers (again behind the stroke) of (interlocking that is first section 3a of core bar and urceolus 1) rear push-rod, and plug 2 returns back to the product export state with push rod 4.But; Core bar 3 is in interlocking state and does not upwards reply with push rod 4; Deviate from the 4th section taper hole 4f of 3d from push rod 4 of core bar and get among the second sector hole 2b on the plug 2; And make the upper surface of the 4th section 3d of core bar and the lower surface of push rod 4 join, locate, promptly accomplished the relative position change of core bar 3 with push rod 4.

Can be known by Fig. 5: the present invention is when realizing oppressing push rod (secondary re-journey) once more after syringe unmakes, and compression takes place plug 2 once more; Push rod 4 is stroke downwards; Core bar 3 begins to move down among the endoporus 1b of urceolus 1 with push rod 4 from the interlocking position with urceolus 1, realizes secondary re-journey.This trip is in order to carrying out other expection actions, like the protection action that triggers safe injection needle etc.

Claims

1. the safety injector that has secondary re-journey; Form by urceolus (1), plug (2), core bar (3) and push rod (4); It is characterized in that: plug (2) has the cylinder of four sector holes for inner center; From bottom to top: first sector hole (2a) is isometrical circular hole, and its diameter is slightly less than the diameter of second section (3b) on the core bar (3); Second sector hole (2b) is isometrical circular hole, and its diameter is greater than the maximum gauge of the 4th section (3d) on the core bar (3), and hole depth is greater than 2 times of the 4th section (3d) on the core bar (3) height; The 3rd sector hole (2c) is isometrical circular hole, and its diameter is greater than the diameter of second sector hole (2b), and its hole depth is highly consistent with first section (4a) of push rod (4) bottom; The 4th sector hole (2d) is isometrical circular hole, and its diameter equals the diameter of second section (4b) of push rod (4) bottom, and its hole depth equals the height of second section (4b) of push rod (4) bottom;

Again, core bar (3) is three sections round platforms and three sections cylinders that cylinder is formed, and from bottom to top: first section (3a) on the core bar (3) is the little down big round platform of, and its upper end diameter is slightly less than the internal diameter of the endoporus (1b) on the urceolus (1); Second section (3b) on the core bar (3) is cylinder, and the lower end diameter of first section (3a) on its diameter and the core bar (3) is consistent; The 3rd section (3c) on the core bar (3) little round platform for down big, and the diameter of second section (3b) on its lower end diameter and the core bar (3) is consistent; The 4th section (3d) on the core bar (3) is the little down big round platform of, and its lower end diameter is not less than second section (3b) cylindrical diameter on the core bar (3); The 5th section (3e) on the core bar (3) is cylinder, and the lower end diameter of the 4th section (3d) on its diameter and the core bar (3) is consistent; The 6th section (3f) on the core bar (3) is cylinder, and through hole (4e) width on its diameter and push rod (4) bottom second section (4b) is consistent; The height of the 4th section (3d) on the height of first section (3a) on the core bar (3) and the core bar (3) is consistent;

Again, push rod (4) bottom is three sections waney cylinders, from bottom to top: the diameter of first section (4a) of push rod (4) bottom greater than the diameter of second section (4b) of push rod (4) bottom less than the diameter of the 3rd section (4c) of push rod (4) bottom; There is through hole (4e) both sides, upper end of second section (4b) of push rod (4) bottom jagged (4d), center respectively; The height of through hole (4e) equals the height of the 6th section (3f) on the core bar (3), and the diameter of the 6th section (3f) on the width of through hole (4e) and the core bar (3) is consistent; Between breach (4d) and the through hole (4e) is thin-walled form; First and second section (4a, 4b) center of push rod (4) bottom have a slit upwards with second section (4b) of push rod (4) bottom on through hole (4e) link to each other; First and second section (4a, 4b) of push rod (4) bottom is divided into two lobes, and this two lobe can be the folding that appropriateness is done in the center of circle with breach (4d) on second section (4b) of push rod (4) bottom and the thin-walled between the through hole (4e) respectively; There are two sections endoporus first and second section (4a, 4b) cylindrical center of push rod (4) bottom, and from bottom to top: following sector hole is the little down big taper hole (4f) of, and its size be able to hold the 4th section (3d) on the core bar (3); Last sector hole (4g) is isometrical circular hole, and the lower end diameter of its diameter and hypomere taper hole (4f) is consistent and greater than the width of through hole (4e) on second section (4b) cylinder of push rod (4) bottom, and be able to hold the 5th section (3e) cylinder on the core bar (3);

In 6% Rule cone joint endoporus (1b) of urceolus (1) bottom the bossy body (1a) that is the multi-petal shape formula is arranged, the maximum gauge of first section (3a) of the somewhat larger in diameter of its endoporus (1b) on core bar (3) again; The distance (1c) of bossy body (1a) to inner chamber body equals the height of first section (3a) on the core bar (3), and half the less than endoporus (1b) hole depth; Minimum diameter after many lobes bossy body (1a) surrounds equals the diameter of second section (3b) on the core bar (3).

2. the safety injector with secondary re-journey according to claim 1; It is characterized in that: when first section (3a) on the core bar (3) passes the bossy body (1a) on the urceolus (1) from top to down; Both interlockings; First section (3a) on the core bar (3) must not be drawn back from former road, if pull by force, core bar (3) then will be in the light section place of its 3rd section (3c) fracture.

3. the safety injector with secondary re-journey according to claim 1 is characterized in that: second section (3b) on first sector hole (2a) on the plug (2) and the core bar (3) is in closed state all the time; The colloid of second sector hole (2b) on the plug (2) outside under the effect of external force, vertically compression; Simultaneously, push rod (4) has one to continue downward stroke, i.e. stroke again; And when external force was cancelled, the colloid of second sector hole (2b) outside on the plug (2) relied on the performance of self that push rod (4) is upwards replied.

4. the safety injector with secondary re-journey according to claim 1; It is characterized in that: when the colloid of the outside of second sector hole (2b) on the plug (2) is replied; Because interlocking has taken place for first section (3a) on the core bar (3) and the bossy body (1a) on the urceolus (1), core bar (3) will upwards not replied with push rod (4); After deviating from the taper hole (4f) of core bar (3) from push rod (4), can not return wherein again, and make the location that joins, the lower surface of upper surface and the push rod (4) of the 4th section (3d) on the core bar (3); When once more plug (2) being applied external force and promptly oppresses push rod (4) once more, it is secondary re-journey that core bar (3) will move a stroke downwards with push rod (4) once more from the interlocking position beginning with urceolus (1).

5. the safety injector with secondary re-journey according to claim 1; It is characterized in that: the colloidal compression through second sector hole (2b) on the plug (2) outside realizes that syringe also has one to continue downward stroke when injection is accomplished, i.e. stroke again.

6. the safety injector with secondary re-journey according to claim 1 is characterized in that: interlocking through core bar (3) and urceolus (1) and the relative position through core bar (3) and push rod (4) change that to move a stroke once more downwards on the core bar (3) of the realizing syringe position behind the stroke again be secondary re-journey.