CN104027874A - Retractable type safe injection syringe with changeable needle - Google Patents
Retractable type safe injection syringe with changeable needle Download PDFInfo
- Publication number
- CN104027874A CN104027874A CN201410277213.9A CN201410277213A CN104027874A CN 104027874 A CN104027874 A CN 104027874A CN 201410277213 A CN201410277213 A CN 201410277213A CN 104027874 A CN104027874 A CN 104027874A
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- China
- Prior art keywords
- pushing cylinder
- slider
- needle
- arranges
- taper head
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
Abstract
The invention provides a retractable type safe injection syringe with a changeable needle. The retractable type safe injection syringe with the changeable needle comprises a jacket, a protecting sleeve, a taper head, a pushing barrel, a first liquid-proof ring, a slider, a spring, a rear plug and a second liquid-proof ring. On the aspect of the design, scientific physical data are adopted, locking, interference and separating structures of various accessories of the retractable type safe injection syringe with the changeable needle are arranged, and the needle is changeable, can retract in the pushing barrel, and is not exposed after being used; a nurse can operate the retractable type safe injection syringe with a single hand; after the retractable type safe injection syringe with the changeable needle is used, the needle is not exposed; phenomena that the needle is exposed, the nurse is pierced by the exposed needle, and infectious disease propagation or social harm are caused are avoided; and moreover, the retractable type safe injection syringe with the changeable needle is novel in structure.
Description
Technical field
The present invention relates to a kind of self-destroy safety injector, more particularly, the present invention relates to a kind of capable of changing needle hair style retractable safety injector.
Background technology
Syringe is the most basic a kind of medical apparatus and instruments, and in order to reduce the propagation of blood borne disease in patient, make laws one after another and force to promote the use of disposable syringe in the countries in the world including China.But, safety device can be reused and not have to common disposable syringe ubiquity at present, the defects such as the rear needle tubing of injection exposes, easily utilized by lawless person or drug addiction gentleman on the one hand, on the other hand by script only disposable syringe reuse, very easily cause virus disseminating and cross infection.In collection and treatment process, stab medical personnel for syringe needle after preventing the use of disposable syringe, cause hepatitis B, hepatitis C, aids transmission to cause medical personnel and infect, countries in the world all adopt self-destroy safety injector at research promotion.At present known self-destroy safety injector is mainly piston puncture type or manually pull-type with syringe needle, also has at needle stand auto spring is set, in the time having injected liquid, push rod is pushed into syringe foremost, meanwhile, by needle stand together with needle retractable to syringe, to prevent the outstanding syringe needle people of stabbing.But still there are various design defect in these self-destroy safety injectors.
Granted publication number is a kind of automatic retracting device syringe of the U.S. Patent Application Publication of US6572584.B1, make needle tubing together with syringe needle can automatic retracted pushing cylinder in, this structure main purpose is that syringe needle is not exposed, reach safety effect, but inventor fails to expect this structural design is existed to 2 major defects:
1. inventor does not expect: this structure just can pull out pushing cylinder by fingernail after (60) position of figure Fig3 is used, be retracted in simultaneously needle stand in cylindrical shell together with syringe needle and spring (41) from pushing cylinder figure Fig17, (18) (41), (19) fall down (41) position, although needle retractable is in pushing cylinder, but the security purpose that syringe needle does not expose after using cannot realize, if (58) with figure Fig4B (60) position of figure Fig3 conversely, (60) position interference locking, this product cannot use so, (58) position of figure Fig4B own need to be slidably matched while using liquid medicine injection with (60) position, so inventor fails to expect that it is to fall to reveal that this structure pushing cylinder after nurse uses also can pull out needle tubing after this structure is used, there is major defect in safe practice.
2. inventor fails to expect: this structure cannot be on automated machine automatic Composition, necessary self-made clamp, otherwise cannot complete (24) spring assembling of figure Fig3, therefore,, with librarian use special fixture solution assembly process, cause this product cannot form the technological process of production, efficiency is low, labor cost is high, product is polluted, so inventor fails to expect serious technological deficiency.
The defect of patent of invention ZL94193486.1 is the same
The defect of patent of invention ZL99805273.6 is the same
The Chinese patent that Granted publication number is CN200980874Y discloses a kind of self-destroy safety injector, by automatic retracting device is set in pushing cylinder, make needle stand together with syringe needle can automatic retracted to pushing cylinder.But how this invention is compressed in Compress Spring problem (the pushing cylinder inner wall smooth and fastening without any object of pushing cylinder bottom before failing thoroughly to solve and using, Compress Spring fastening can not be compressed), while also not solving interference, how the liquid of remainder leads to the problem of liquid.
For this reason, U.S. Patent Application Publication No. US20040215150AI discloses a kind of syringe with automatic retracting device, wants to supplement this breach:
1) adopt: the bias piece of a spring (7), surrounds the shank of connecting rod (67).It is top (543) end wall that engages push rod that spring (7) has a upper end (71), spring also has a lower end contrary with upper end, makes lower end (72) embed and be locked in detent recess (81) inner by bias piece;
2) adopt: actuating section has the end (83) of a propelling to follow puncture (62) end of connecting rod mobile, traction end (89).When connecting shaft (61) the joint end pressurized of connecting rod, depart from from adjacent area, outer ring (66), once the upper end (83) that promotes of spring (7) follows puncture (62) end to move down, traction end (89) can be the lower end of spring (7) (72) pull-out detent recess (82);
3) packing ring: laying of packing ring is that back cavity (234) and the back cavity front wall (221) that bulge loop (417) will be taken to overcoat engages.The formation of packing ring (3) provides a resistance, and in the time doing subcutaneous or intravenous injection puncture action, move in certain position of back cavity front wall (221) preventing this resistance support bulge loop (417) location.So just allow bulge loop (417) to depart from from certain position of syringe back cavity (221), so that in the time applying first external force, can make end of tubular needle position (41) move at outer casing inner wall (230) thereupon;
4) utilize: when the maximum position phase interference of position and the needle stand (412) of clamping mechanism (61) minimum, so at this moment, the liquid of surplus is just sealed, cannot circulate, when now push rod (5) is pushed ahead, occur three problems again:
1. by after nurse's normal operating inserting needle subcutaneous puncture, normally use finger pressure and speed, this method for designing can seal surplus liquid in the time of (61) and (412) interference;
Unless 2. nurse strengthens finger pressure and advances fast, at this time needle tubing is to human body subcutaneous injection liquid, and fast injection operation is defective like this;
If 3. in normal operating, surplus is sealed while stopping when (61) and (412) interference so, and intensified pressure pushes forward again, at this moment punctures and can make a movement at the needle tubing of subcutaneous muscle, and victim is the most painful.
Publication number be US5211628A U.S. Patent Application Publication a kind of syringe with automatic retracting device, this syringe has adopted the bias piece of a spring, surround the shank of connecting rod, spring has a upper end engaging with the top end wall of push rod, also has one and is embedded and be locked in the lower end in detent recess by bias piece; In addition, actuating section has the end of a propelling to follow the cutting tip of connecting rod to move.Traction end, when the shaft coupling end pressurized of connecting rod departs from from adjacent area, outer ring, the promotion end on spring will follow cutting tip to move down, and traction end can be the lower end of spring pull-out detent recess; Moreover, engage by laying back cavity and the back cavity front wall that packing ring takes bulge loop to overcoat, for the formation of packing ring provides a resistance, this resistance support bulge loop location, to prevent that move certain position of packing ring back cavity front wall in the time doing subcutaneous or intravenous injection puncture action, so just allow bulge loop to depart from from certain position of syringe back cavity, so that in the time applying first external force, can make end of tubular needle position move at outer casing inner wall thereupon.But, also there are some defects in this syringe: in the time of the phase interference of the position of the position of clamping mechanism minimum and needle stand maximum, the liquid of surplus is just sealed, cannot circulate, if now intensified pressure is pushed ahead push rod again, puncture can be vibrated at the needle tubing of subcutaneous muscle, causes suffering to the patient who accepts injection.
Granted publication number is that the Chinese patent of CN2817873Y also discloses a kind of self-destroy safety injector, this syringe adopts draw point resilient mounting, and be arranged in outer needle stand, be assembled into needle assembly, be threaded connection again in injection tube top, not only there is the feature of common draw point resilience disposable syringe, also there is the advantages such as production technology is simple, easy to assembly, but it still cannot solve the resistance problem of end plug, and the design of the ball-type of end plug front end also can increase liquid residue.
Although the United States Patent (USP) that Granted publication number is US6379336B1 improves the structure of self-destroy safety injector, this structure is more complicated and be not easy assembling, and cost costliness, and liquid residue is high, is difficult to accept the in the situation that of injecting fluid costliness.
Although developed a large amount of self-destroy safety injectors at present, these syringes still exist various faults of construction, particularly when syndeton interference, the problem that surplus liquid is sealed is not resolved always.The present invention is on the basis of existing technology, the structure of self-destroy safety injector is improved further, to solve above-mentioned technical problem.
Content of the present invention
The object of the invention is to overcome above patent defect and cannot easily expect or can not expect overcoming comprehensively these prior aries, the present invention comprises that according to the weak point on a kind of self-destroy safety injector basis of patent No. ZL200810096785.1 etc. defect improves, comprise on the fixed needle of safety injector, be improved to capable of changing needle hair style retractable safety injector, and can be configured on a kind of capable of changing needle hair style safety injector by user optional pin number by the iso standard syringe needle of existing market, so very convenient user, simultaneously also for user is saved a pecuniary spending.On its assembling of standard needle with ISO capable of changing needle hair style safety injector, after using its taper head (2) and slider (13) together with standard needle resilience pushing cylinder (11) internal locking in the projection (23) of rear plug (22), reach syringe needle and do not expose guarantee nurse personal safety, stop because using rear syringe needle to expose harm society, cause hepatitis B, hepatitis C, the source of disease of acquired immune deficiency syndrome (AIDS) is propagated, realize syringe needle interchangeable, with standard needle (27) can bounce back equally reach in pushing cylinder (11) use after syringe needle do not expose the object that reaches equally syringe needle and realize retraction, and liquid flows into human body by the liquid-through hole (30) of taper head (2).
The present invention is achieved by the following technical solutions:
A kind of capable of changing needle hair style retractable safety injector, comprise overcoat (1), taper head (2), pushing cylinder (11), the first anti-liquid circle (25), slider (13), spring (16), rear plug (22), the second anti-liquid circle (7), its technical scheme is:
One, a kind of capable of changing needle hair style safety injector uses the rear end (24) of rear needle automatic retracting in pushing cylinder (11), and lock onto the projection (23) of rear plug (22), realizing syringe needle does not expose, protection nurse personal safety, stop because syringe needle sharp weapon expose harm personal safety, overcoat (1) front end arranges cavity (6), cavity (6) is installed taper head (2) and the second anti-liquid circle (7) is installed, the external diameter (26) of the internal diameter of the second anti-liquid circle (7) and taper head (2) is slidably matched, the external diameter of the second anti-liquid circle (7) and cavity (6) internal diameter are slidably matched, cavity (6) external diameter setting enters to coordinate with the internal diameter of sheath (8), prevent air-borne bacteria intrusion taper head (2) and syringe needle, in the time using, advance the top (32) of pushing cylinder (11) that the second anti-liquid circle (7) is advanced toward cavity (6) front end, realize the second anti-liquid circle (7) and depart from taper head (2), make taper head (2) not located by any physical constraint, pushing cylinder (11) upper end arranges step (20) interference fit of interior diameter (21) and slider (13), this structure arranges tapering interference fit, once slightly be subject to counteracting force, the interior diameter (21) of step (20) the safe escape pushing cylinder (11) of slider (13), pushing cylinder (11) front end (17) also arranges clasp (12) or point type clasp (18), slider (13) comprises that spring (16) is arranged in the clasp (12) of pushing cylinder (11) or the front end (17) of point type clasp (18), restricted spring (16) band slider (13) location, not discharged by elastic force, realize the elastic force release request while use, pushing cylinder (11) also arranges first step (36) and second step (37) tight fit of rear end (24) and rear plug (22), prevent from using institute to fall down, in the time that nurse uses, institute's pushing cylinder that advances (11) simultaneously, be arranged on pushing cylinder (11) front end (17) slider (13) the first plane (28) automatically with the second plane (29) that is arranged on the taper head (2) in the cavity (6) of overcoat (1) interference of joining, formation applies a counteracting force, force the lamellar mushroom-shaped (5) of slider (13) and protruding clasp (4) the interference fastening of taper head (2) simultaneously, the step (20) of slider (13) departs from the interior diameter (21) of pushing cylinder (11) simultaneously, T-shaped (14) of slider (13) are forced to cross clasp (12) or the point type clasp (18) of pushing cylinder (11) simultaneously, be arranged on pushing cylinder (11) front end (17) medi-spring (16) simultaneously and bring into play its elasticity simultaneously, slider (13) is sprung into pushing cylinder (11) internal locking in the projection (23) of rear plug (22) together with the related standard needle of taper head (2) (27) and needle tubing simultaneously, realizing syringe needle does not expose, guarantee nurse can not exposed and stab by syringe needle sharp weapon, cause acquired immune deficiency syndrome (AIDS), hepatitis B, the source of disease such as hepatitis C infect, after reaching protection nurse's personal safety and stopping syringe use, because exposing, syringe needle sharp weapon endanger society, the prior art that overcomes safety injector cannot be expected, the outstanding main points of the present invention.
Two, overcoat (1) front end arranges described cavity (6), the top plane layout circular hole (35) of cavity (6), circular hole (35) also arranges circular hole projection (40), the outer bulge loop (33) of installation code syringe needle (27) locks in circular hole projection (40) and ensures internal diameter (42) 6:100 of standard needle (27) and the mutual interference of front end (3) 6:100 of taper head (2), realizes locking effect.Taper head (2) is installed in the cavity (6) of overcoat (1), cavity (6) is also installed the second anti-liquid circle (7), the second anti-liquid circle (7) is slidably matched with cavity (6) interference of overcoat (1), prevents liquid leakage; Overcoat (1) cavity (6) lower end also arranges resistance ring (41), prevent that the stressed needle stand of subcutaneous inserting needle from retreating, safety assurance is provided, and internal diameter (9) interference that external diameter (10) and sheath (8) are set is slidably matched, liquid-through hole (30) antibacterial that prevents taper head (2) is invaded, and the present invention is one of outstanding main points wherein.
Three, taper head (2) front end is set to tapering 6:100 (3) and works in coordination with the internal diameter 6:100 of standard needle (27), taper head (2) rear end arranges protruding clasp (4) and links closely with lamellar mushroom-shaped (5) interference of slider (13) front end, taper head (2) also arranges external diameter (26) and the second anti-liquid circle (7) internal diameter interference fit, and on taper head (2) top, liquid-through hole (30) is set, when slider (13) is under elastic force effect, slider (13) is sprung into pushing cylinder (11) internal locking in the projection (23) of rear plug (22) together with taper head (2), the liquid of syringe flows into human body by the liquid-through hole (30) of taper head (2) simultaneously, the present invention is one of outstanding main points wherein.
Four, the front end (17) of pushing cylinder (11) arranges clasp (12) or point type clasp (18), the front end (17) of pushing cylinder (11) is also installed slider (13) and is comprised spring (16), clasp (12) or point type clasp (18) are mainly withheld in being arranged on pushing cylinder (11), the slider (13) of front end (17) comprises spring (16) location, makes spring (16) form before use static pressure state, pushing cylinder (11) upper end also arranges groove (31), groove (31) is installed the first anti-liquid circle (25), the first anti-liquid circle (25) is slidably matched with the internal diameter (38) of overcoat (1), pushing cylinder (11) upper end also arranges interior diameter (21), slider (13) is installed, step (20) interference fit with slider (13), pushing cylinder (11) also arranges rear end (24) and is total to secondary interference fit with first step (36) and the second step (37) of rear plug (22), prevent that rear plug (22) from easily falling down, expose syringe needle, cause stabbing human body, harm society, the present invention is one of outstanding main points wherein.
Five, slider (13) front end arranges lamellar mushroom-shaped (5), ditch body (39) is also set in the middle of lamellar mushroom-shaped (5) and forms lamellar, slider (13) rear end arranges T-shaped (14), slider (13) also arranges centre bore (34), T-shaped (14) of slider (13) are arranged on clasp (12) or point type clasp (18) front end (17) of pushing cylinder (11), mainly spring (16) compression set, form static pressure, when pushing cylinder (11) forward impelling, be arranged on the interference of joining of first plane (28) of slider (13) of pushing cylinder (11) front end (17) and second plane (29) of taper head (2), force T-shaped (14) of slider (13) to cross clasp (12) or the point type clasp (18) in pushing cylinder (11), the elasticity that the spring (16) of while in static pressure brought into play it springs into slider (13) and the related standard needle of taper head (2) (27) in pushing cylinder (11) together, the projection (23) of plug (22) after interference locking, realizing syringe needle does not expose, the present invention is one of outstanding main points wherein.
Six, rear plug (22) center arranges projection (23) and is installed in the rear end (24) of pushing cylinder (11), the external diameter of rear plug (22) arranges two stage steps, it is rear end (24) the interference tight fit of first step (36) and second step (37) and pushing cylinder (11), in the time of pushing cylinder (11) forward impelling, step (20) pressurized that is arranged on the slider (13) of pushing cylinder (11) upper end departs from the interior diameter (21) of pushing cylinder (11), slider (13) is sprung into the projection (23) of locking and rear plug (22) together with the related standard needle of taper head (2) (27), prevent that people from pulling open for forcing, cause syringe needle to depart to fall dew, injury personal safety, the present invention is one of outstanding main points wherein.
Seven, cavity (6) external diameter (10) interference that sheath (8) arranges internal diameter (9) and overcoat (1) is slided and is locked, and prevents that air-borne bacteria from invading described taper head (2) and standard needle (27).
Technical solution of the present invention, particularly in the product technology structural design of outstanding capable of changing needle hair style automatic telescopic, stop nurse and stabbed by sharp spike because of carelessness in use or after using, realize protection nurse personal safety and be not subject to hepatitis B, hepatitis C, the virus disseminatings such as acquired immune deficiency syndrome (AIDS) are object, therefore the first plane (28) that is slider (13) from the technological core of structural design automatically and the interference of joining of second plane (29) of taper head (2), force the lamellar mushroom-shaped (5) of slider (13) and protruding clasp (4) interference of taper head (2) simultaneously, the step (20) of slider (13) departs from the interior diameter (21) of pushing cylinder (11) simultaneously, T-shaped (14) of slider (13) cross clasp (12) or the point type clasp (18) of pushing cylinder (11) simultaneously, spring (16) is brought into play its elasticity simultaneously, slider (13) is sprung in pushing cylinder (11) together with taper head (2) band standard needle (27) simultaneously, lock onto the projection (23) of rear plug (22) simultaneously, 6 actions are in performance at the same time, and liquid continues to flow into human body by the liquid-through hole (30) of taper head (2), this technology fails to expect to inventor, the present invention is one of outstanding main points wherein.
A product is obtained the authorization from inventing to, also needing product accessories to be applicable to mould produces, accessory die structure could reach the demoulding, whether various accessories are suitable for automatization or semi-automatic device assembles, also have product whether to adapt to the marketization, and the structural design of product of the present invention overcomes above defect part, described overcoat, sheath, taper head, pushing cylinder, the first anti-liquid circle, slider, spring, rear plug, the second anti-liquid circle accessory overcomes from Mold Making, the mould structure demoulding is until automated production, realize unmanned assembling, minimizing personnel pollute product composition, these technology essential factors have overcome three large key elements in the time of the present patent application, that is: invention, transform and produce, the marketization.
Brief description of the drawings:
Fig. 1 is embodiment of the present invention structural representation
Fig. 2 is that embodiment of the present invention slider and tapering headband needle retractable lock onto rear plug structure schematic diagram
Fig. 3 is the local structure for amplifying schematic diagram of the embodiment of the present invention
Fig. 4 is embodiment of the present invention overcoat structure for amplifying schematic diagram
Fig. 4 a be embodiment of the present invention Fig. 4 overlook structure for amplifying schematic diagram
Fig. 5 is the invention process taper head structural representation
Fig. 6 is the anti-liquid coil structures of the invention process second schematic diagram
Fig. 7 is the invention process jacket structure schematic diagram
Fig. 8 is the snap ring structure schematic diagram of the invention process pushing cylinder
Fig. 8 a is the point type snap ring structure schematic diagram of the invention process pushing cylinder
Fig. 9 is plug structure schematic diagram after the invention process
Figure 10 is the invention process slider structural representation
Figure 11 is the anti-liquid coil structures of the invention process first schematic diagram
Figure 12 is the invention process spring structure schematic diagram
Figure 13 is the invention process standard needle structural representation
In figure: 1, overcoat; 2, taper head; 3, taper head 6:100; 4, protruding clasp; 5, lamellar is mushroom-shaped; 6, cavity; 7, the second anti-liquid circle; 8, sheath; 9, sheath internal diameter; 10, cavity external diameter; 11, pushing cylinder; 12, clasp; 13, slider; 14, T-shaped; 15, slider external diameter; 16, spring; 17, front end; 18, point type clasp; 19, spacing; 20, step; 21, pushing cylinder interior diameter; 22, rear plug; 23, projection; 24, rear end; 25, the first anti-liquid circle; 26, taper head external diameter; 27, standard needle; 28, the first plane; 29, the second plane; 30, liquid-through hole; 31, groove; 32, top; 33, outer bulge loop; 34, centre bore; 35, circular hole; 36, first step; 37, second step; 38, outer casing internal diameter; 39, ditch body; 40, circular hole projection; 41, resistance ring; 42, standard needle internal diameter 6:100.
Specific embodiments:
In embodiment: with reference to Fig. 1,2,3, in the invention process, described capable of changing needle hair style retractable safety injector as shown in Figure 1, Figure 2, Figure 3 shows, comprises overcoat 1, taper head 2, the second anti-liquid circle 7, sheath 8, pushing cylinder 11, the first anti-liquid circle 25, slider 13, rear plug 22, spring 16.
As shown in Figure 1, Figure 2, Figure 3 shows, capable of changing needle hair style safety injector uses rear needle automatic retracting in pushing cylinder 11 rear ends 24, and lock onto the projection 23 of rear plug 22, realizing syringe needle does not expose, protection nurse personal safety, stops because syringe needle sharp weapon expose, harm personal safety, overcoat 1 front end arranges cavity 6, cavity 6 is installed taper head 2 and the second anti-liquid circle 7 is installed, the external diameter 26 of the internal diameter of the second anti-liquid circle 7 and taper head 2 is slidably matched, the external diameter of the second anti-liquid circle 7 and cavity 6 internal diameters are slidably matched, in the time using, advance the top 32 of pushing cylinder 11 that the second anti-liquid circle 7 is advanced toward cavity 6 front ends, realize taper head 2 and depart from the second anti-liquid circle 7, make taper head 2 not be subject to any physical constraint, pushing cylinder 11 upper ends arrange step 20 interference fit of interior diameter 21 and slider 13, this structure arranges tapering interference fit, once slightly stressed, the interior diameter 21 of the step 20 safe escape pushing cylinders 11 of slider 13, pushing cylinder 11 front ends also arrange clasp 12 or point type clasp 18, restricted spring 16 is with slider 13 to locate, not discharged by elastic force, realize the elastic force release request while use, as Fig. 2, Fig. 8 pushing cylinder 11 also arranges first step 36 and second step 37 tight fits of rear end 24 and rear plug 22, prevent from using institute to fall down, as Fig. 1, Fig. 3, Fig. 8, Fig. 8 a slider 13 comprises that spring 16 is arranged in the clasp 12 of pushing cylinder 11 or the front end 17 of point type clasp 18, as Fig. 2 in the time that nurse uses the pushing cylinder that advances 11 simultaneously, be arranged on pushing cylinder 11 front ends 17 slider 13 the first plane 28 automatically with the second plane 29 that is arranged on the taper head 2 in the cavity 6 of overcoat 1 interference of joining, formation applies a counteracting force, force the lamellar mushroom-shaped 5 of slider 13 and the protruding clasp 4 interference fastenings of taper head 2 simultaneously, the step 20 of slider 13 departs from the interior diameter 21 of pushing cylinder 11 simultaneously, T-shaped 14 of while slider 13 is forced to cross clasp 12 or the point type clasp 18 of pushing cylinder 11, be arranged on pushing cylinder 11 front end 17 medi-springs 16 simultaneously and bring into play its elasticity simultaneously, slider 13 is sprung into pushing cylinder 11 internal lockings in the projection 23 of rear plug 22 together with the related standard needle 27 of taper head 2 and needle tubing simultaneously, realizing syringe needle does not expose, guarantee nurse can not exposed and stab by syringe needle sharp weapon, cause acquired immune deficiency syndrome (AIDS), hepatitis B, the source of disease such as hepatitis C infect, after reaching protection nurse's personal safety and stopping syringe use, because exposing, syringe needle sharp weapon endanger society, the prior art that overcomes safety injector cannot be expected, the outstanding main points of the present invention.
As shown in Figure 3, Figure 4, overcoat 1 front end arranges cavity 6, the top plane layout circular hole 35 of cavity 6, circular hole 35 also arranges circular hole projection 40, the mutual interference of 6:100 that the outer bulge loop 33 of installation code syringe needle 27 locks in circular hole projection 40 and ensure the 6:100 of internal diameter 42 and the front end 3 of taper head 2 of standard needle 27, realizes locking effect.The interior installation taper head 2 of cavity 6 of overcoat 1, cavity 6 is also installed the anti-liquid circle 7 of the second anti-liquid circle 7, the second and is slidably matched with cavity 6 interference of overcoat 1, prevents liquid leakage; Overcoat 1 cavity 6 lower ends also arrange resistance ring 41, prevent that the stressed needle stand of subcutaneous inserting needle from retreating, safety assurance is provided, and external diameter 10 is set is slidably matched with internal diameter 9 interference of sheath 8, liquid-through hole 30 antibacterials that prevent taper head 2 are invaded, and the present invention is one of outstanding main points wherein.
As Fig. 1, Fig. 2, Fig. 3, shown in Fig. 5, taper head 2 front ends are set to 3 of tapering 6:100 and work in coordination with the internal diameter 6:100 of standard needle 27, taper head 2 rear ends arrange protruding clasp 4 and link closely with mushroom-shaped 5 interference of lamellar of slider 13 front ends, taper head 2 also arranges external diameter 26 and the second anti-liquid circle 7 internal diameter interference fit, and on taper head 2 tops, liquid-through hole 30 is set, when slider 13 is under elastic force effect, slider 13 is sprung into pushing cylinder 11 internal lockings in the projection 23 of rear plug 22 together with taper head 2, the liquid of syringe flows into human body by the liquid-through hole 30 of taper head 2 simultaneously, the present invention is one of outstanding main points wherein.
As shown in Fig. 2, Fig. 3, Fig. 8, the front end 17 of pushing cylinder 11 arranges clasp 12 or point type clasp 18, the front end 17 of pushing cylinder 11 is also installed slider 13 and is comprised spring 16, clasp 12 or point type clasp 18 are mainly withheld in being arranged on pushing cylinder 11, the slider 13 of front end 17 comprises that spring 16 locates, and makes spring 16 form before use static pressure state; Pushing cylinder 11 upper ends also arrange groove 31, groove 31 is installed the anti-liquid circle 25 of the first anti-liquid circle 25, the first and is slidably matched with the internal diameter 38 of overcoat 1, and pushing cylinder 11 upper ends also arrange interior diameter 21, slider 13 is installed, with step 20 interference fit of slider 13, pushing cylinder 11 also arranges rear end 24 and is total to secondary interference fit with first step 36 and the second step 37 of rear plug 22, prevents that rear plug 22 from easily falling down, expose syringe needle, cause stabbing human body, harm society, the present invention is one of outstanding main points wherein.
As shown in Fig. 3, Figure 10, slider 13 front ends arrange lamellar mushroom-shaped 5, in the middle of lamellar mushroom-shaped 5, ditch body 39 is also set and forms lamellar, slider 13 rear ends arrange T-shaped 14, slider 13 also arranges centre bore 34, T-shaped 14 of slider 13 is arranged on clasp 12 or point type clasp 18 front ends 17 of pushing cylinder 11, mainly spring 16 compression set, form static pressure, when pushing cylinder 11 forward impelling, the first plane 28 and the second plane 29 of taper head 2 that is arranged on the slider 13 of pushing cylinder 11 front ends 17 interference of joining, force T-shaped 14 of slider 13 to cross clasp 12 or the point type clasp 18 in pushing cylinder 11, spring 16 its elasticity of performance in static pressure spring into slider 13 and the related standard needle 27 of taper head 2 in pushing cylinder 11 together simultaneously, the projection 23 of plug 22 after interference locking, realizing syringe needle does not expose, the present invention is one of outstanding main points wherein.
As Fig. 2, shown in Fig. 9, Hou Sai 22 centers arrange projection 23 and are installed in the rear end 24 of pushing cylinder 11, the external diameter of rear plug 22 arranges two stage steps, be the rear end 24 interference tight fits of first step 36 and second step 37 and pushing cylinder 11, in the time of pushing cylinder 11 forward impelling, step 20 pressurizeds that are arranged on the slider 13 of pushing cylinder 11 upper ends depart from the interior diameter 21 of pushing cylinder 11, slider 13 is sprung into the projection 23 of locking and rear plug 22 together with the related standard needle 27 of taper head 2, prevent that people from pulling open for forcing, cause syringe needle to depart to fall dew, injury personal safety, the present invention is one of outstanding main points wherein.
As shown in Figure 1, sheath 8 arranges internal diameter 9 and slides and be locked with cavity 6 external diameter 10 interference of overcoat 1, prevents air-borne bacteria intrusion taper head 2 and standard needle 27.
Claims (7)
1. a capable of changing needle hair style retractable safety injector, comprise overcoat (1), sheath (8), taper head (2), pushing cylinder (11), the first anti-liquid circle (25), slider (13), spring (16), rear plug (22), the second anti-liquid circle (7), it is characterized in that: the rear end (24) of needle automatic retracting in described pushing cylinder (11) after capable of changing needle hair style safety injector uses, and lock onto the projection (23) of described rear plug (22), realizing syringe needle does not expose, described overcoat (1) front end arranges cavity (6), described cavity (6) is installed described taper head (2) and described the second anti-liquid circle (7) is installed, the external diameter (26) of the internal diameter of described the second anti-liquid circle (7) and taper head (2) is slidably matched, the external diameter of described the second anti-liquid circle (7) and described cavity (6) internal diameter are slidably matched, the internal diameter tight fit of the external diameter of described cavity (6) and sheath (8), prevent that air-borne bacteria from invading described taper head (2) and syringe needle, described pushing cylinder (11) upper end arranges step (20) interference fit of interior diameter (21) and described slider (13), described pushing cylinder (11) front end (17) also arranges clasp (12) or point type clasp (18), described slider (13) comprises that described spring (16) is arranged in the clasp (12) of described pushing cylinder (11) or the described front end (17) of point type clasp (18), described pushing cylinder (11) also arranges first step (36) and second step (37) tight fit of rear end (24) and described rear plug (22), in the time that using, nurse advances described pushing cylinder (11) simultaneously, be arranged on described pushing cylinder (11) front end (17) slider (13) the first plane (28) automatically with the second plane (29) that is arranged on the described taper head (2) in the cavity (6) of described overcoat (1) interference of joining, formation forces protruding clasp (4) the interference fastening automatically of the lamellar of described slider (13) mushroom-shaped (5) and described taper head (2) when applying a counteracting force, the interior diameter (21) that the step (20) of described slider (13) departs from described pushing cylinder (11) simultaneously, T-shaped (14) of described slider (13) are forced to cross clasp (12) or the point type clasp (18) of described pushing cylinder (11) simultaneously, be arranged on spring (16) described in described pushing cylinder (11) front end (17) simultaneously and bring into play its elasticity simultaneously, described slider (13) is sprung into described pushing cylinder (11) internal locking in the projection (23) of described rear plug (22) together with the related standard needle of described taper head (2) (27) and needle tubing simultaneously, realizing syringe needle does not expose, guarantee nurse can not exposed and stab by syringe needle sharp weapon, cause acquired immune deficiency syndrome (AIDS), hepatitis B, the source of disease such as hepatitis C infect, after reaching protection nurse's personal safety and stopping syringe use, because exposing, syringe needle sharp weapon endanger society.
2. capable of changing needle hair style retractable safety injector according to claim 1, it is characterized in that: overcoat (1) front end arranges cavity (6), the top plane layout circular hole (35) of cavity (6), circular hole (35) also arranges circular hole projection (40), when installation code syringe needle (27), padlock is in outer bulge loop (33), taper head (2) is installed in the cavity (6) of overcoat (1), cavity (6) is also installed the second anti-liquid circle (7) and is slidably matched with cavity (6) interference of overcoat (1), prevents liquid leakage; Overcoat (1) cavity (6) lower end also arranges resistance ring (41), prevent that the stressed needle stand of subcutaneous inserting needle from retreating, and internal diameter (9) interference that external diameter (10) and sheath (8) are set is slidably matched, prevent that liquid-through hole (30) antibacterial of taper head (2) from invading.
3. capable of changing needle hair style retractable safety injector according to claim 1, it is characterized in that: taper head (2) front end is set to tapering 6:100 (3) and works in coordination with the internal diameter 6:100 (42) of standard needle (27), taper head (2) rear end arranges protruding clasp (4) and links closely with lamellar mushroom-shaped (5) interference of slider (13) front end, taper head (2) also arranges external diameter (26) and the second anti-liquid circle (7) internal diameter interference fit, and on taper head (2) top, liquid-through hole (30) is set, when slider (13) is under elastic force effect, slider (13) is sprung into pushing cylinder (11) internal locking in the projection (23) of rear plug (22) together with taper head (2), the liquid of syringe flows into human body by the liquid-through hole (30) of taper head (2) simultaneously.
4. capable of changing needle hair style retractable safety injector according to claim 1, it is characterized in that: the front end (17) of pushing cylinder (11) arranges clasp (12) or point type clasp (18), the front end (17) of pushing cylinder (11) is also installed slider (13) and is comprised spring (16), clasp (12) or point type clasp (18) are mainly withheld in the slider (13) that is arranged on pushing cylinder (11) front end (17) and are comprised spring (16) location, make spring (16) form before use static pressure state, pushing cylinder (11) upper end also arranges groove (31), groove (31) is installed the first anti-liquid circle (25), the first anti-liquid circle (25) is slidably matched with the internal diameter (38) of overcoat (1), pushing cylinder (11) upper end also arranges interior diameter (21), slider (13) is installed, step (20) interference fit with slider (13), pushing cylinder (11) also arranges rear end (24) and is total to secondary interference fit with first step (36) and the second step (37) of rear plug (22), prevent that rear plug (22) from easily falling down, expose syringe needle, cause stabbing human body, harm society.
5. capable of changing needle hair style retractable safety injector according to claim 1, it is characterized in that: slider (13) front end arranges lamellar mushroom-shaped (5), ditch body (39) is also set in the middle of lamellar mushroom-shaped (5) and forms lamellar, slider (13) rear end arranges T-shaped (14), slider (13) also arranges centre bore (34), T-shaped (14) of slider (13) are arranged on clasp (12) or point type clasp (18) front end (17) of pushing cylinder (11), mainly spring (16) compression set, form static pressure, when pushing cylinder (11) forward impelling, be arranged on the interference of joining of first plane (28) of slider (13) of pushing cylinder (11) front end (17) and second plane (29) of taper head (2), formation applies T-shaped (14) that a counteracting force forces slider (13) simultaneously and crosses clasp (12) or the point type clasp (18) in pushing cylinder (11), the elasticity that the spring (16) of while in static pressure brought into play it springs into slider (13) and the related standard needle of taper head (2) (27) in pushing cylinder (11) together, the projection (23) of plug (22) after interference locking, realizing syringe needle does not expose.
6. capable of changing needle hair style retractable safety injector according to claim 1, it is characterized in that: rear plug (22) center arranges projection (23) and be installed in the rear end (24) of pushing cylinder (11), the external diameter of rear plug (22) arranges two stage steps, it is rear end (24) the interference tight fit of first step (36) and second step (37) and pushing cylinder (11), in the time of pushing cylinder (11) forward impelling, step (20) pressurized that is arranged on the slider (13) of pushing cylinder (11) upper end departs from the interior diameter (21) of pushing cylinder (11), slider (13) is sprung into the projection (23) of locking and rear plug (22) together with the related standard needle of taper head (2) (27), prevent that people from pulling open for forcing, cause syringe needle to depart to fall dew, injury personal safety.
7. capable of changing needle hair style retractable safety injector according to claim 1, it is characterized in that: sheath (8) arranges internal diameter (9) and slides and be locked with cavity (6) external diameter (10) interference of overcoat (1), prevent air-borne bacteria intrusion taper head (2) and standard needle (27).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277213.9A CN104027874A (en) | 2014-06-19 | 2014-06-19 | Retractable type safe injection syringe with changeable needle |
| PCT/CN2014/086029 WO2015192485A1 (en) | 2014-06-19 | 2014-09-05 | Retractable safe syringe with changeable needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410277213.9A CN104027874A (en) | 2014-06-19 | 2014-06-19 | Retractable type safe injection syringe with changeable needle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104027874A true CN104027874A (en) | 2014-09-10 |
Family
ID=51459008
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410277213.9A Pending CN104027874A (en) | 2014-06-19 | 2014-06-19 | Retractable type safe injection syringe with changeable needle |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN104027874A (en) |
| WO (1) | WO2015192485A1 (en) |
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| CN105709309A (en) * | 2016-01-06 | 2016-06-29 | 徐昊华 | Intelligent safe injection syringe |
| CN108014397A (en) * | 2017-12-07 | 2018-05-11 | 汕头华尔怡医疗器械有限公司 | Syringe |
| CN108211051A (en) * | 2018-01-08 | 2018-06-29 | 杨德怡 | A kind of changing needle hair style retractable safety injector |
| CN109303954A (en) * | 2017-07-27 | 2019-02-05 | 刘期全 | Syringe construction |
| WO2022041524A1 (en) * | 2020-08-27 | 2022-03-03 | 汕头华尔怡医疗器械有限公司 | Syringe barrel structure and syringe having same |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110251395A (en) * | 2019-07-23 | 2019-09-20 | 四川普瑞斯生物科技有限公司 | A kind of Medical safety type is from the puncture needle that bounces back |
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Also Published As
| Publication number | Publication date |
|---|---|
| WO2015192485A1 (en) | 2015-12-23 |
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Application publication date: 20140910 |