CN108211051B - Needle-replaceable retractable safety syringe - Google Patents
Needle-replaceable retractable safety syringe Download PDFInfo
- Publication number
- CN108211051B CN108211051B CN201810014352.0A CN201810014352A CN108211051B CN 108211051 B CN108211051 B CN 108211051B CN 201810014352 A CN201810014352 A CN 201810014352A CN 108211051 B CN108211051 B CN 108211051B
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- slider
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- shaped
- needle
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- 239000007788 liquid Substances 0.000 claims description 38
- 235000001674 Agaricus brunnescens Nutrition 0.000 claims description 18
- 230000002159 abnormal effect Effects 0.000 claims description 11
- 230000003068 static effect Effects 0.000 claims description 9
- 239000007858 starting material Substances 0.000 claims description 7
- 235000017166 Bambusa arundinacea Nutrition 0.000 claims description 6
- 235000017491 Bambusa tulda Nutrition 0.000 claims description 6
- 241001330002 Bambuseae Species 0.000 claims description 6
- 235000015334 Phyllostachys viridis Nutrition 0.000 claims description 6
- 239000011425 bamboo Substances 0.000 claims description 6
- 206010066054 Dysmorphism Diseases 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 description 11
- 230000007547 defect Effects 0.000 description 8
- 238000009434 installation Methods 0.000 description 8
- 239000000047 product Substances 0.000 description 8
- 238000002347 injection Methods 0.000 description 5
- 239000007924 injection Substances 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000007920 subcutaneous administration Methods 0.000 description 5
- 230000010399 physical interaction Effects 0.000 description 3
- 208000030507 AIDS Diseases 0.000 description 2
- 208000005176 Hepatitis C Diseases 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 2
- 239000003814 drug Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 208000002672 hepatitis B Diseases 0.000 description 2
- 238000001990 intravenous administration Methods 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 210000003205 muscle Anatomy 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 208000035049 Blood-Borne Infections Diseases 0.000 description 1
- 244000208734 Pisonia aculeata Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 230000006978 adaptation Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 210000004905 finger nail Anatomy 0.000 description 1
- 208000015181 infectious disease Diseases 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000007847 structural defect Effects 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Classifications
-
- 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
-
- 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
-
- 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
- A61M5/3129—Syringe barrels
-
- 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
- A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
- A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
- A61M5/321—Means for protection against accidental injuries by used needles
- A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
-
- 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
- A61M5/3129—Syringe barrels
- A61M2005/3131—Syringe barrels specially adapted for improving sealing or sliding
Abstract
The invention provides a needle-replaceable retraction type safety syringe, which comprises an outer sleeve, a push cylinder, a taper seat, a special-shaped liquid-proof ring, a slider, a spring, a rear plug and a piston ring, wherein scientific physical data are adopted in design to improve the locking, interference and disengaging structures of all parts of the needle-replaceable retraction type safety syringe, so that the needle can be replaced in the push cylinder, the needle can be retracted in the push cylinder, the needle is not exposed after the needle is used, the full-automatic equipment production is realized after improvement, the product quality is ensured, the production cost is reduced, and the structure is novel.
Description
Technical Field
The invention relates to a safe syringe with retractable needle, which can replace needles with different sizes according to the use requirement.
Background
The syringe is the most basic medical instrument, and is a disposable safety syringe which is forcedly popularized and used by various national legislation including China in order to reduce the transmission of blood-borne diseases in patients. The known self-destroying safety injector is mainly piston puncture type or manual pulling type with needle, and also has automatic spring set in the needle seat, when the liquid is injected, the push rod is pushed to the front end of the needle cylinder, and at the same time, the needle seat and the needle are retracted into the needle cylinder to prevent the protruding needle from stabbing the person. However, these self-destructing safety syringes still suffer from various design drawbacks.
U.S. patent application publication No. us6572584.b1 discloses an automatic retraction device injector which allows the needle tube together with the needle to be automatically retracted into the plunger, the main purpose of which is to prevent the needle from being exposed for safety, but the inventor fails to think that there are two serious drawbacks to this structural design:
(1) the inventors did not think: the structure can be pulled out of the push barrel by a fingernail after the structure is used at the (60) position of fig. 3, and simultaneously the needle seat retracted in the barrel, together with the needle and the spring, falls off from the (41) positions of (41) and (19) of the push barrel map 17, although the needle is retracted in the push barrel, the safety purpose that the needle is not exposed after the use cannot be achieved, if the (60) position of fig. 3 is in interference locking with the (58) and (60) positions of fig. 4B in turn, the product cannot be used, and the (58) position of fig. 4B and the (60) position of the self fig. 4B need sliding fit when the injection liquid medicine is used, so the inventor cannot think that the structure can be pulled out after a nurse uses the structure, and the safety technology has serious defects.
(2) The inventors failed to think: the structure cannot be automatically assembled on an automatic machine, a clamp is required to be self-made, otherwise, the assembly of the spring (24) in Fig3 cannot be completed, so that a person uses a special clamp to solve the assembly process, the product cannot form a production process flow, the efficiency is low, the work price is high, the product is polluted, and the inventor cannot think of serious technical defects.
The defects of the invention patent number ZL94193486.1 are the same as the above
The defects of the invention patent number ZL99805273.6 are the same as the above
Chinese patent publication No. CN200980874Y discloses a self-destroying safety syringe, which is characterized in that an automatic retraction device is arranged in a push barrel, so that a needle seat and a needle head can be automatically retracted to the push barrel. However, the invention fails to thoroughly solve the problem of how to compress the compression spring at the lower part of the push cylinder before use (the inner wall of the push cylinder is smooth and has no object to buckle, and the compression spring cannot be buckled and compressed), and the problem of how to pass the liquid remained during interference.
To this end, U.S. patent application publication No. US20040215150AI discloses a syringe with an automatic retraction device intended to supplement this gap:
1) The method adopts the following steps: a biasing member of the spring (7) surrounds the shank of the connecting rod (67). The spring (7) has an upper end (71) engaging the end wall of the top (543) of the push rod and a lower end opposite the upper end, the lower end (72) being inserted and locked in the braking recess (81) by the biasing member;
2) The method adopts the following steps: the actuating portion has a pushing tip (83) which moves with the piercing (62) end of the connecting rod, pulling the tip (89). When the joint end of the connecting shaft (61) of the connecting rod is pressed and separated from the outer ring abutting region (66), once the pushing tail end (83) of the spring (7) moves downwards along with the puncture (62), the pulling tail end (89) can pull the lower end (72) of the spring (7) out of the braking groove (82);
3) Gasket: the gasket is positioned to bring the collar (417) into engagement with the rear cavity (234) and the rear cavity front wall (221) of the outer sleeve. The formation of the washer (3) provides a resistance that supports the collar (417) against movement at a location on the posterior chamber front wall (221) during subcutaneous or intravenous puncture procedures. This allows the collar (417) to disengage from a portion of the syringe rear chamber (221) so that the tubular needle position (41) can move with it on the inner wall (230) of the sheath when a first external force is applied;
4) Using: when the minimum position of the clamping mechanism (61) is in interference with the maximum position of the needle seat (412), the residual liquid is sealed and cannot circulate, and when the push rod (5) is pushed forward again, three problems occur:
(1) after the nurse normally operates the needle to insert the subcutaneous puncture, if the finger pressure and the speed are normally used, the design method seals the residual liquid when the interference of the design method (61) and the design method (412) is carried out;
(2) unless the nurse increases finger pressure and rapidly advances, the needle tube is used for injecting liquid into the human body subcutaneously, and the rapid injection operation is not qualified;
(3) if in normal operation, when the remainder is sealed and stopped when (61) and (412) are in interference, the pressure is increased again to push forward, at the moment, the needle tube penetrating the subcutaneous muscle can move once, and the victim is most painful.
U.S. patent application publication No. US5211628A discloses a syringe with an automatic retraction device that employs a biasing member of a spring surrounding the shank of the connecting rod, the spring having an upper end that engages the top end wall of the push rod and a lower end that is inserted and locked into a detent recess by the biasing member; in addition, the actuating portion has an advancing tip that moves with the piercing end of the connecting rod. The traction tail end is used for pulling the lower end of the spring out of the braking groove when the coupling end of the connecting rod is pressed to be separated from the abutting area of the outer ring and the pushing tail end on the spring moves downwards along with the puncture end; furthermore, by placing the collar in engagement with the front wall of the rear cavity of the housing, a resistance is provided to the formation of the collar that supports the collar against movement at a location on the front wall of the rear cavity of the collar during subcutaneous or intravenous puncture, thus allowing the collar to disengage from a location on the rear cavity of the syringe so that the tubular needle can be moved with it when a first external force is applied. However, this syringe also has some drawbacks: when the minimum position of the clamping mechanism is in interference with the maximum position of the needle seat, residual liquid is sealed and cannot circulate, and at the moment, if the pressure is increased to push the push rod forward again, the needle tube penetrating the subcutaneous muscle can vibrate, and pain is caused to a patient receiving injection.
The Chinese patent with the publication number of CN2817873Y also discloses a self-destruction type safety syringe, which adopts a steel needle rebound device and is arranged in an outer needle seat to be assembled into a needle head assembly, and the needle head assembly is connected to the top end of a syringe barrel through threads.
Although the structure of the self-destroying safety syringe is improved by the U.S. patent publication No. US6379336B1, the structure is complex, is not easy to assemble, is expensive, has high liquid residue, and is unacceptable when the injected liquid is expensive.
Although a number of self-destructing safety syringes have been developed, these syringes still suffer from a variety of structural drawbacks, particularly the problem of the remaining liquid being sealed off when the connection structure is in interference. The invention further revolutionizes the structure of the self-destroying safety syringe on the basis of the prior art to solve the problems in the prior art. Summary of the invention
The invention aims to overcome the defects of the prior art that the prior art cannot be easily or completely overcome, the self-destruction type safety syringe according to the patent number ZL200810096785.1 has the defects that the self-destruction type safety syringe is arranged on a fixed needle, the replaceable needle type retractable type safety syringe (hereinafter referred to as publication number) with publication number of CN104027874A and application number of 201410277213.9 is arranged on a replaceable needle, the technical scheme has the structural defects that the assembly of the ISO standard needle is not realized, the difference is that the structure of each part is adopted, the sample practice proves that the publication number has serious defects after more than three years, the technical scheme can not realize the replacement of the needle, the technical route and the implementation scheme of the technical scheme are realized from conversion production to marketization after the structure is thoroughly reset and implemented, and the needle with the needle number arbitrarily selected by a user can be arranged on the replaceable type safety syringe according to the ISO standard needle of the prior market (see accessory picture), thus being convenient for a user, and simultaneously saving the cost on a money for the user. The standard needle of the ISO is assembled on the replaceable needle type safety syringe, after the syringe is used, the taper seat (3) and the slider (5) rebound together with the standard needle to the inside of the push cylinder (2) to be locked on the convex block (27) of the rear plug (7), so that the needle is not exposed to ensure personal safety of nurses, the disease sources of hepatitis B, hepatitis C and AIDS are prevented from spreading due to the fact that the needle is exposed to harm society after the syringe is used, the needle can be replaced, the standard needle can be retracted into the push cylinder (2) as well, the aim of retracting the needle is achieved as the needle is not exposed after the syringe is achieved, and liquid flows into a human body through the mushroom (21) of the slider (5) and the different strip type (22) of the taper seat (3).
The invention is realized by the following technical scheme:
1. the utility model provides a removable syringe needle formula safety syringe that contracts, includes overcoat (1), push away section of thick bamboo (2), tapering seat (3), dysmorphism prevent liquid circle (4), slider (5), spring (6), back stopper (7), piston ring (8), its technical scheme lies in: the front end of the outer sleeve (1) is provided with a resistance guiding ring (9), the inner diameter of the resistance guiding ring (9) is provided with a resistance guiding ring cavity (28), the resistance guiding ring is provided with a rear end plane (29) and a step limit (31) of the taper seat (3) which are limited by each other, the front end of the outer sleeve (1) is provided with a special-shaped convex ring (14) (the outer sleeve (1) in the publication number fails to disclose the technical scheme), the taper seat (3) is provided with a first step (11), a second step (10), a step limit (31) is naturally formed between the first step (11) and the second step (10), the step limit (31) which is fully utilized to be naturally formed is limited by the rear end plane (29) of the resistance guiding ring (9) when the outer sleeve (1) is arranged, the installation of the special-shaped convex ring is prevented, the top end of the special-shaped convex ring is also provided with a special-shaped convex ring (22) which is mainly embodied in different lengths and thickness, the special-shaped design is provided with a mushroom type (21) when the slider (5) is arranged, the effect of being less in interference force is in a mushroom type, the self-tightening force is in a large interference force is not disclosed, the special-shaped convex ring (2) is provided, the expansion type (12) is provided, on the other hand, the special-shaped convex ring (2) is provided with the expansion type (12) is considered, and the expansion type is provided, the technical scheme is that automatic equipment is not required to be considered, the production efficiency is improved (a second liquid-proof ring (7) in a publication number cannot be disclosed, the special-shaped liquid-proof ring (4) is installed on a first step (11) of a taper seat (3), a convex (12) of the special-shaped liquid-proof ring (4) is tightly matched with the first step (11) of the taper seat (3), the special-shaped liquid-proof ring (4) is installed at a position of a central round hole (26) of a jacket (1), a step limit (31) of the taper seat (3) is limited by a rear end plane (29) of the jacket (1) during installation, the installation is prevented from exceeding, a second step (10) of the taper seat (3) and a guide ring (9) of the jacket (1) are in sliding fit with each other, an outer diameter (13) of the special-shaped liquid-proof ring (4) and an inner diameter plane of the front end of the jacket (1) are in interference fit with each other, the jacket (1) and the second liquid-proof ring (7) cannot be disclosed, the technical scheme is provided, the needle is not inclined when the needle is assembled, the needle is not required to be installed on the front end of the common needle (3) and the common needle is not required to be matched with the common needle (3), the common needle is not required to be installed on the front end (2), providing a slider (5), wherein the slider comprises a spring (6) and is arranged on a bearing platform plane (15) of a push cylinder (2), so that a second step (17) and a third step (18) which are arranged on the slider (5) naturally form a second step (30) to limit the bearing platform plane (15) of the push cylinder (2), the slider comprises the spring (6) and is limited by the bearing platform plane (15) of the push cylinder (2), the top end of the slider (5) is also provided with a mushroom (21), a liquid through groove (25) is also arranged, the slider (5) is provided with a first step (16), a second step (17) and a third step (18), the technical scheme is that the third step (18) of the slider (5) is arranged on the bearing platform plane (15) of the push cylinder (2) and is mutually in interference holding with a taper (19), the second step (17) and the third step (18) of the slider (5) are fully utilized to naturally form the second step (30) to limit the push cylinder (11) and the slider (13) in the publication number, the elastic force of the slider (6) is controlled, forcing the spring (6) to form static pressure (technical scheme in publication number) adopts the T-shaped (14) of the slider (13) to be buckled on the buckling ring (12) or the point buckling ring (18) of the pushing barrel (11) to enable the spring (16) to form static pressure, when the pushing barrel (11) is pressed, the T-shaped (14) of the slider (13) passes over the buckling ring (12) or the point buckling ring (18) of the pushing barrel (11), the spring (16) acts at the moment, the buckling ring (12) or the point buckling ring (18) belongs to forced demolding on a mold, technical risks exist, the forced demolding can enable the buckling ring (12) or the point buckling ring (18) to be easily deformed in a physical way, the technical scheme is different from the technical scheme that the third step (18) of the slider (5) and the taper (19) of the pushing barrel (2) are adopted to be mutually in interference and buckled, the trigger (32) is arranged at the lower end of the third step (18) of the slider (5) to be stressed by the second step (30), the trigger (33) of the trigger seat (3) is stressed, the spring (6) acts slightly, the third step (18) is acted on the slider (5), and the third step (18) does not need to be stressed once the step (5) is stressed easily, and the step (17) is not stressed on the sliding step (5) is mounted on the sliding barrel (2) to be easily, and the technical scheme is taken into consideration, the spring (6) is limited by a first step (16) arranged on the slider (5), and cannot play a role, when the mushroom (21) of the slider (5) is pushed forward, the abnormal strip type (22) of the interference taper seat (3) is clamped, when liquid clamped by the mushroom (21) and the abnormal strip type (22) continues to circulate from the liquid through groove (25), the front end of the push cylinder (2) is further provided with a groove (24) for installing a piston ring (8) to be assembled on the inner diameter of the outer sleeve (1), and the push cylinder (2) is in sliding fit with the inner diameter of the outer sleeve (1) to form a whole set of products, and the special-shaped taper seat is characterized in that when the push cylinder (2) is pushed forward, the top end (20) of the push cylinder (2) pushes against the position of the abnormal strip type (12) of the abnormal strip type liquid prevention ring (4), the abnormal strip type taper seat (14) of the outer sleeve (1) is separated, the abnormal strip type (12) of the abnormal strip type liquid prevention ring (4) is separated from the first step (11) of the taper seat (3), the inner diameter of the guide ring (9) is pushed forward, and the guide ring (28) of the inner diameter of the guide ring (1) is pushed forward, and the third step (18) of the slider (5) is separated from the abnormal strip type (19) of the abnormal strip type (2) at the same time, simultaneously, a trigger (33) arranged on the taper seat (3) is contacted with a starter (32) arranged at the lower end of a third step (18) of the slider (5), and simultaneously, the spring (6) releases the nature of the trigger, so that the slider (5), the taper seat (3) and the needle tube can simultaneously exert the protruding blocks (27) with the rear plug (7) locked on the push tube (2).
2. The front end of the outer sleeve (1) is provided with a guide ring (9) and a second step (10) of the taper seat (3) which are in sliding fit with each other, the guide taper seat (3) is arranged in the structure as a center, the first step (11) of the taper seat (3) is provided with a special-shaped liquid-proof ring (4) and the inner diameter plane of the front end of the outer sleeve (1) are provided with a special-shaped convex ring (14) which is in interference tight fit with each other, the rear end plane (29) of the outer sleeve (1) limits the installation of the taper seat (3) to be too far, when the special-shaped liquid-proof ring (4) is pushed, the first step (11) of the taper seat (3) is separated, the guide ring (9) of the outer sleeve (1) is pushed to the inner diameter guide ring cavity (28) of the outer sleeve (1), and meanwhile the special-shaped convex ring (14) are separated from the outer sleeve (1), so that the front end of the outer sleeve (1) is provided with a technical structure, and the guide ring (9), the guide ring cavity (28), the special-shaped convex ring (14) and the outer sleeve (1) in the technical structure are limited by the rear end plane (29) to be different from the outer sleeve (1) in the publication number.
3. The push cylinder (2) is provided with a bearing platform plane (15) for limiting the slide (5) and the bearing platform plane (15) arranged by the spring (6), a third step (18) of the slide (5) is provided for tightly holding the taper (19) of the push cylinder (2) in an interference manner, the spring (6) is forced to be pressed to form a static state, the push cylinder (2) is further provided with a groove (24) for installing the piston ring (8) and the jacket (1) in a sliding fit manner, so that the push cylinder (2) is simple and reasonable in structure, the structural complexity is avoided, the structural technical scheme is influenced, and the taper (19) of the push cylinder (2) and the third step (18) of the slide (5) in the technical scheme are in interference holding manner and are different from the buckle ring (12) or the point type buckle ring (18) of the push cylinder (11) in the publication number for buckling the slide (13).
4. The taper seat (3) is provided with a first step (11), a second step (10) and a different piece type (22) arranged at the top, the first step (11) is provided with a special-shaped liquid-proof ring (4), the convex type (12) arranged by the special-shaped liquid-proof ring (4) is mutually interfered with the first step (11) of the taper seat (3), meanwhile, the outer diameter (13) of the special-shaped liquid-proof ring (4) is mutually interfered with the special-shaped convex ring (14) on the inner diameter plane of the front end of the outer sleeve (1), the leakage is prevented from happening, the taper seat (3) is required to be born when the universal standard needle is assembled, the taper seat (3) is set by backing, the step limit (31) between the first step (11) and the second step (10) of the taper seat (3) is limited by the rear end plane (29) of the guide ring (9) of the outer sleeve (1), the step limit (31) arranged between the first step (11) and the second step (10) is prevented from being arranged, the taper seat (3) is arranged on the outer sleeve (1) in an assembling way, the sliding type (5) is provided at the top of the taper seat (3) and the different piece type (22) is required to bear the taper seat (3) to be backed up, the step limit (21) is arranged together with the guide ring (9) of the needle head (1) and the guide ring (9) is arranged, the different strip type (22) of the taper seat (3) and the mushroom type (21) arranged at the front end of the slider (5) are tightly clamped with each other in an interference manner, so that physical interaction is realized in the technical scheme, and the first step (11) and the second step (10) of the taper seat (3) in the technical scheme are different from the taper head (2) in the publication number in the different strip type (22).
5. The top end of the slider (5) is provided with a mushroom type (21), a liquid through groove (25), a first step (16) comprising the slider (5), a second step (17) and a third step (18), the first step (16) is arranged to limit the exertion of a spring (6), the second step (17) is used for guiding the spring (6) during installation, the third step (18) and the taper (19) of the pushing cylinder (2) are tightly held by interference mutually, the spring (6) is forced to be pressed to form a static pressure state, a second step (30) between the second step (17) and the third step (18) and a bearing platform plane (15) of the pushing cylinder (2) are mutually limited to prevent the slider (5) from being excessively assembled, the mushroom type (21) of the slider (5) pushes the abnormal strip type (22) of the interference taper seat (3) to be tightly clamped, and liquid flows into a human body through the liquid through groove (25) of the mushroom type (21), the slider (5) is adopted to set up the third step (18) and the taper (19) of the pushing cylinder (2) to be tightly held by interference mutually to form a static pressure state, the second step (30) between the second step (17) and the slider (18) comprises a third step (18) and the lower end (32), is distinguished from a point type snap ring (18) or a snap ring (12) which adopts a slider (13) to be fastened with a push cylinder (11) in the publication number.
6. The special-shaped liquid-proof ring (4) is designed into an inner diameter convex shape (12), the position of the top end (20) of the push cylinder (2) is matched with the convex surface to push, expansion resistance is reduced, on the other hand, the orientation of the special-shaped liquid-proof ring (4) in the assembly process of automatic equipment is considered, the left side and the right side of the convex shape (12) of the special-shaped liquid-proof ring (4) are identical, and the convex shape (12) of the special-shaped liquid-proof ring (4) in the technical structure is different from that of a second liquid-proof ring (7) in a publication number.
7. Under the interaction of physical objects, the design of the structure is also the same principle and conception setting with the physical interaction, 6 functions are simultaneously performed, the conception and the technical characteristics of the technical scheme are that the jacket (1), the push tube (2), the taper seat (3), the slider (5) and the special-shaped liquid-proof ring (4) are provided, and the structural characteristics of the special-shaped liquid-proof ring and other parts are that the manufacturing of parts is realized under the mutual data setting and the physical interaction, and the simplification of the part design and the adaptation of the parts to the automatic equipment installation and the automatic installation are taken as one of primary consideration, so the technical scheme defects of the technical invention, the process manufacturing complexity and the like are overcome, the practical (low price) of the product is achieved, and the invention, the conversion production and the marketization of the product are realized.
The technical scheme of the invention is characterized in that when the push cylinder (2) advances forwards, the top end (20) of the push cylinder (2) pushes against the convex (12) of the special-shaped liquid-proof ring (4), the special-shaped liquid-proof ring (4) is separated from the special-shaped convex ring (14) of the outer sleeve (1), the special-shaped liquid-proof ring (4) is separated from the first step (11) of the taper seat (3), the inner diameter guide ring cavity (28) of the guide ring (9) of the outer sleeve (1) advances, the third step (18) of the slider (5) is separated from the taper (19) of the push cylinder (2), the front end of the slider (5) is provided with the interference taper seat (3) of the special-shaped liquid-proof ring (4), the trigger (33) of the setting seat (3) is separated from the special-shaped convex ring (14) of the outer sleeve (1), the special-shaped liquid-proof ring (4) is separated from the first step (11) of the taper seat (3), the inner diameter guide ring cavity (28) of the guide ring (9) of the outer sleeve (1) advances, the third step (18) of the slider (5) is separated from the taper (19) of the push cylinder (2), the front end of the slider (5) is provided with the mushroom (21) interference taper seat (3) and the interference strip (22), the trigger (33) is simultaneously contacted with the third step (32) of the slider (3) at the same time, and the trigger (32) is released from the trigger (3) and the trigger (3) is released The needle tube and the protruding blocks (27) which are locked on the rear plug (7) of the push tube (2) are exerted at the same time in 6 ways, so that the purpose that the needle head automatically retracts and is not exposed after the liquid injection is finished is achieved by 6 simultaneous technical schemes. And the liquid continuously flows into the human body through the different strip type (22) of the taper seat (3), and the technology is different from a replaceable needle type retractable safety syringe with publication number of CN104027874A and application number of 201410277213.9.
Description of the drawings:
FIG. 1 is a schematic view of a structure of an embodiment of the present invention
FIG. 2 is a schematic view of a partially enlarged structure according to an embodiment of the present invention
FIG. 3 is a schematic view showing a slider and a taper seat according to an embodiment of the present invention, with a needle retracted and locked to a rear plug
FIG. 4 is an enlarged schematic view of the jacket according to the embodiment of the present invention
FIG. 4a is an enlarged schematic top view of FIG. 4 according to an embodiment of the present invention
FIG. 5 is a schematic view of a taper seat according to the present invention
FIG. 6 is a schematic view of a special-shaped liquid-proof ring according to the present invention
FIG. 7 is a schematic view of a pushing cylinder according to the present invention
FIG. 7a is an enlarged schematic top view of a push-up barrel according to the present invention
FIG. 8 is a schematic view of a slider according to an embodiment of the present invention
FIG. 8a is an enlarged schematic top view of a slider embodying the present invention
FIG. 9 is a schematic view of a rear plug structure according to the embodiment of the present invention
FIG. 10 is a schematic view of a spring structure according to the present invention
FIG. 11 is a schematic view of a piston ring according to the present invention
In fig. 1: 1. a jacket; 2. pushing a cylinder; 3. a taper seat; 4. a special-shaped liquid-proof ring; 5. a slider; 6. a spring; 7. a rear plug; 8. piston rings; 27. a bump; 30. a second step; 32. a starter; 33. a trigger;
in fig. 2: 1. a jacket; 2. pushing a cylinder; 3. a taper seat; 4. a special-shaped liquid-proof ring; 5. a slider; 6. a spring; 9. a resistance guiding ring; 11. a first step; 12. convex shape; 14. a special-shaped convex ring; 15. a bearing platform plane; 16. a first step; 17. a second step; 18. a third step; 19. taper; 20. the top end of the pushing cylinder; 21. a mushroom shape; 22. different strip type slices; 25. a liquid channel; 26. a central circular hole; 28. a resistance guiding ring cavity; 29. a rear end plane; 30. a second step; 31. step limiting; 32. a starter; 33. a trigger;
in fig. 3: 3. a taper seat; 5. a slider; 6. a spring; 7. a rear plug; 15. a bearing platform plane; 18. a third step; 19. taper; 20. the top end of the pushing cylinder; 21. a mushroom shape; 22. different strip type slices; 26. a central circular hole; 27. a bump; 28. a resistance guiding ring cavity; 29. a rear end plane; 30. a second step; 31. step limiting; 32. a starter; 33. a trigger;
in fig. 4: 1. a jacket; 9. a resistance guiding ring; 14. a special-shaped convex ring; 26. a central circular hole; 28. a resistance guiding ring cavity; 29. a rear end plane;
in fig. 5: 3. a taper seat; 10. a second step; 11. a first step; 22. different strip type slices; 31. step limiting; 33. a trigger;
in fig. 6: 4. a special-shaped liquid-proof ring; 12. convex shape; 13. an outer diameter;
in fig. 7: 2. pushing a cylinder; 15. a bearing platform plane; 19. taper; 20. the top end of the pushing cylinder; 24. a groove;
in fig. 8: 5. a slider; 16. a first step; 17. a second step; 18. a third step; 21. a mushroom shape; 25. a liquid channel; 30. a second step; 32. a starter;
in fig. 9: 7. a rear plug; 27. a bump;
in fig. 10: 6. a spring;
in fig. 11: 8. piston ring.
Specific embodiments:
in the examples: referring to fig. 1, 2 and 3, in the implementation of the present invention, the retractable safety syringe with a replaceable needle as shown in fig. 1, 2 and 3 includes the following components in fig. 1: the novel anti-liquid-leakage device comprises an outer sleeve 1, a push cylinder 2, a taper seat 3, a special-shaped anti-liquid ring 4, a slider 5, a spring 6, a rear plug 7 and a piston ring 8.
As shown in fig. 1, 2, 3, 4, 5, 6, 8 and 10, after the replaceable needle type safety syringe is used, the needle automatically retracts after the product shown in fig. 3 is used, when no liquid medicine exists in the product, the push cylinder 2, the taper seat 3, the special-shaped liquid-proof ring 4, the slider 5 and the spring 6 of the structure play roles simultaneously, the needle retracts and locks the needle to the lug 27 of the rear plug 7, the needle is not exposed, the personal safety of nurses is protected, and the personal safety is prevented from being endangered due to the exposure of the needle type sharp tool; in the implementation, the front ends of the jackets 1 of the figures 4 and 2 are provided with a central round hole 26, the central round hole 26 of the figure 2 is provided with the taper seat 3 of the figure 5 and the special-shaped liquid-proof ring 4 of the figure 6, the convex 12 of the special-shaped liquid-proof ring 4 is tightly matched with the outer diameter 11 of the taper seat 3 of the figure 5, the outer diameter of the special-shaped liquid-proof ring 4 of the figure 6 is tightly matched with the front end special-shaped convex ring 14 of the jacket 1 of the figure 4, when in use, the top end 20 of the push tube 2 of the figure 3 pushes the convex 12 of the special-shaped liquid-proof ring 4 of the figure 3 towards the front end of the guide ring 28 of the figure 3, the taper seat 3 of the figure 3 is separated from the special-shaped liquid-proof ring 4, the figure 3 is realized, the taper seat 3 is free from any object restriction, the figure 3 plays a role in static spring 6 at the moment, the figure 3 is locked with a standard needle head of the figure 5 together with the taper seat 3, the figure 8, the figure 2 push tube 2 is provided with a third step 18 of the figure 8 slide 5, the figure 8 is tightly matched with the figure 5, the slide 5 and the figure 2 is positioned by a spring (6), when in use, the push tube 2 pushes the push tube 2, the top end 20 of the push tube 2 pushes the push tube 2 to push the convex 12 of the special-shaped liquid-proof ring 4 towards the taper ring 28 of the figure 3, and the front end of the figure 3, and the conical piece 2, and the figure 2, and the special-shaped liquid-proof ring 2 is forced to be pushed by the 3, and the 3, the special-shaped liquid-proof ring 3, the figure 3-shaped conical seat 3, and the figure 6, so as required to be locked by the needle 7 Meanwhile, the third step 18 of the slider 5 is separated from the taper 19 of the push cylinder 2 in the figure 3, and the spring 6 is arranged in the bearing platform plane 15 of the push cylinder 2 in the figure 3 to exert the elasticity of the spring 6 in the figure 3, and the slider 5 and the taper seat 3 together with a standard needle and a needle tube are simultaneously sprung into the push cylinder 2 to be locked on the convex block 27 of the rear plug 7, so that the needle is not exposed in the figure 3, the nurse is ensured not to be pricked by the exposure of the needle sharp instrument, the infection of diseases such as AIDS, hepatitis B and hepatitis C is caused, the personal safety of the nurse is protected, the society is prevented from being damaged due to the exposure of the needle sharp instrument after the syringe is used, and the problem that the prior art of the safety syringe cannot be solved is solved.
As shown in fig. 3, fig. 4, fig. 5 and fig. 6, as shown in fig. 4, the front end of the outer sleeve 1 is provided with a central round hole 26, the taper seat 3 of fig. 5 is installed, the side circumference of the central round hole 26 of fig. 4 is provided with a resistance guiding ring 9, the second step 10 of the taper seat 3 of fig. 5 is provided for guiding, the inner diameter of the resistance guiding ring 9 of fig. 4 is also provided with a resistance guiding ring cavity 28, the rear end of the resistance guiding ring cavity 28 of fig. 4 is provided with a special-shaped convex ring 14, the special-shaped liquid-proof ring 4 is positioned in the process of providing the special-shaped liquid-proof ring 4, and the special-shaped liquid-proof ring 4 is pushed into the cavity 28 of the resistance guiding ring as shown in fig. 3 to form the taper seat 3 of fig. 6, and the special-shaped liquid-proof ring 4 are independent respectively, and the structure is simple, and the device is suitable for automatic production.
As shown in fig. 2, fig. 4, fig. 5 and fig. 6, the front end of the taper seat 3 in fig. 5 is provided with a first step 11 and a second step 10, the top end of the taper seat 3 is also provided with a different strip 22, the first step 11 in fig. 5 is in interference tight fit with the special-shaped liquid-proof ring 4 in fig. 6, the special-shaped liquid-proof ring is installed in a central round hole 26 in the front end of the jacket 1 in fig. 2, the second step 10 in fig. 6 of the taper seat 3 is in sliding fit with the resistance ring 9 in the jacket 1 in fig. 4, positioning is implemented, the step limit 31 between the first step 11 and the second step 10 in the taper seat 3 is limited by the rear end plane 29 of the resistance ring 9 in the jacket 1, the installation is prevented from exceeding, and the top end of the taper seat 3 in fig. 5 is provided with a different strip 22 for implementing liquid passing, the special-shaped design is mainly embodied in different lengths and different thicknesses, the effect of small resistance and large pull-back fastening force is realized when the mushroom (21) of the slider (5) is in interference, and in the process of using the pressed liquid flows into human body through the different strip 22 in the taper seat 3 in fig. 5.
As shown in fig. 1, 2, 3, 4, 7, 8, 10 and 11, the push tube 2 of fig. 7 is provided with a taper 19 and a groove 24, the groove 24 is provided with the piston ring 8 of fig. 11 to realize interference sliding fit with the jacket of fig. 4, the taper 19 of the push tube 2 of fig. 7 is realized to realize interference tight fit with the third step 18 of the slider 5 of fig. 8, the spring 6 of fig. 10 is controlled to release elasticity to exert, so that the spring 6 of fig. 10 forms a static pressure state before use, and the push tube 2 of fig. 7 is also provided with a bearing platform plane 15 to provide the slider 5 of fig. 8, the third step 18 and the spring 6 of fig. 10 to realize bearing platform positioning.
As shown in fig. 1, 2, 3, 5, 8 and 10, the top end of the slider 5 in fig. 8 is provided with a liquid through groove 25, the middle groove body of the liquid through groove 25 is used for liquid circulation when injection is used, the rear end of the slider 5 in fig. 8 is provided with a first step 16, a second step 17, a third step 18 and a mushroom 21 at the top end, the first step 16 of the slider 5 in fig. 8 limits the spring 6 in fig. 10 to play, the second step 17 in fig. 8 is provided with a spring 6 guiding function, the third step 18 in fig. 8 is in interference control with the taper 19 of the push tube 2 in fig. 2 to play a role of elasticity in the spring 6 in fig. 10, the mushroom 21 at the top end of the slider 5 in fig. 8 is tightly clamped with the different strip 22 of the taper seat 3 in fig. 5, when the push cylinder 2 in fig. 2 is pushed forward, the taper 19 of the push cylinder 2 in fig. 2 is forced to be separated from the third step 18 of the slider 5 in fig. 8, the spring 6 in fig. 10 is installed and used as a guide on the second step 17 of the slider 5 in fig. 8, meanwhile, the spring 6 in static pressure plays the elasticity of the spring in fig. 2 and 3 instantly, so that the slider 5 in fig. 8 and the taper seat 3 in fig. 5 are sprung into the push cylinder 2 together with a standard needle, and the projection 27 of the rear plug 7 in fig. 3 is locked to realize that the needle is not exposed.
As shown in fig. 1, 3, 7, 9 and 10, a bump 27 is arranged at the center of the rear plug 7 in fig. 9 and is mounted at the rear end of the push barrel 2 in fig. 7, the outer diameter of the rear plug 7 is in interference tight fit with the rear end of the push barrel 2 in fig. 7, when the push barrel 2 in fig. 1 is pushed forward, the third step 18 of the slider 5 mounted at the upper end of the push barrel 2 in fig. 3 is pressed to be separated from the taper 19 of the push barrel 2, and under the action of the elasticity of the spring 6 in fig. 10, the slider 5 in fig. 3 and the taper seat 3 together with a standard needle are sprung into the bump 27 for locking the rear plug 7 in fig. 3, so that the needle is prevented from being pulled apart by manpower force, and the needle is prevented from falling off and dew, and personal safety is damaged.
Claims (1)
1. The utility model provides a removable syringe needle formula safety syringe that contracts, includes overcoat (1), push away section of thick bamboo (2), tapering seat (3), dysmorphism prevent liquid circle (4), slider (5), spring (6), back stopper (7), piston ring (8), its characterized in that: the front end of the outer sleeve (1) is provided with a resistance guiding ring (9) and comprises a rear end plane (29), the inner diameter of the resistance guiding ring (9) is provided with a resistance guiding ring cavity (28), the resistance guiding ring comprises a special-shaped convex ring (14) arranged at the front end of the outer sleeve (1), the taper seat (3) is provided with a first step (11), a second step (10) and a step limit (31) formed between the first step (11) and the second step (10), the top end of the taper seat (3) is further provided with a special-shaped strip-shaped (22) and comprises a trigger (33) arranged at the lower end, the special-shaped liquid preventing ring (4) is designed into a special-shaped shape, the inner side of the special-shaped liquid preventing ring is provided with a convex ring (12) which is matched with the top end (20) of the push cylinder (2), expansion resistance is reduced, the convex ring (12) of the special-shaped liquid preventing ring (4) is matched with the first step (11) of the taper seat (3), the outer diameter (13) of the special-shaped liquid preventing ring (4) is matched with the inner diameter of the outer sleeve (1) which is provided with the special-shaped flat surface (1) to be tightly matched with the convex ring (14) of the outer sleeve (1), the middle part of the outer sleeve (1) is matched with the second step (3), the utility model discloses a three-dimensional sliding device, which is characterized in that a first step of a taper seat (3) and a second step (10) are limited by a rear end plane (29) of a guide resistance ring (9) of a jacket (1) by utilizing a naturally formed step limit (31), the taper seat (3) and the special-shaped liquid-proof ring (4) are installed at the position of a central round hole (26) of the jacket (1), a bearing platform plane (15) is arranged at the front end of a push cylinder (2), a taper (19) is further arranged at the push cylinder (2), a mushroom-shaped (21) is arranged at the top end of a slider (5), a liquid-passing groove (25) is further arranged at the top end of the slider (5), a first step (16) of the slider (5), a second step (17) of the slider (5) and a third step (18) of the slider (5) are included, the spring (6) is installed at the second step (17) of the slider (5), the spring (6) is installed at the lower end of the bearing platform plane (15) of the push cylinder (2), the second step (17) and the third step (17) of the slider (5) is arranged between the second step (5) and the third step (5) by utilizing the second step (18) to form the limit groove (30) of the slider (5), the third step (18) of the slider (5) is arranged on the taper (19) of the pushing cylinder (2) in a mutually interference enclasping manner, the third step (18) of the slider (5) is provided with a step type starter (32), the spring (6) is pressed and matched with the taper (19) of the pushing cylinder (2) in a mutually interference enclasping manner to form a static pressure state, when the mushroom-shaped (21) of the slider (5) pushes, the taper seat (3) is in interference clamping with the different-strip-shaped piece (22) in an interference manner, all liquid continues to circulate through the liquid through grooves (25), the front end of the pushing cylinder (2) is provided with a groove (24) for mounting the piston ring (8), the center of the rear plug (7) is provided with a convex block (27) and is arranged at the rear end of the pushing cylinder (2), the outer diameter of the piston (7) is matched with the inner diameter of the rear end of the pushing cylinder (2), the pushing cylinder (2) is arranged in the interference sleeve (1), when the mushroom-shaped ring (21) pushes, the special-shaped ring (4) pushes away from the top end of the pushing cylinder (4) and the special-shaped ring (4) simultaneously, simultaneously dysmorphism liquid-proof circle (4) break away from first step (11) of tapering seat (3), toward guide and hinder ring cavity (28) are advanced to guide and hinder ring (9) rear end of overcoat (1), simultaneously third step (18) of slider (5) break away from tapering (19) of push away section of thick bamboo (2), simultaneously slider (5) front end sets up mushroom type (21) interference tapering seat (3) abnormal strip piece formula (22) interference chucking, simultaneously set up trigger (33) of tapering seat (3) and setting up starter (32) at third step (18) lower extreme of slider (5) contact interference, simultaneously when push away section of thick bamboo (2) forward propulsion, install third step (18) of slider (5) of push away section of thick bamboo (2) are pressed and are broken away from tapering (19) of push away section of thick bamboo (2), simultaneously under the effect that spring (6) elasticity released, slider (5) take slider (3) to take together to push away in step (16) and advance in slider (5) one step (7) and go into in the tapering seat (7).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014352.0A CN108211051B (en) | 2018-01-08 | 2018-01-08 | Needle-replaceable retractable safety syringe |
| PCT/CN2018/104158 WO2019134381A1 (en) | 2018-01-08 | 2018-09-05 | Retractable safety syringe having replaceable needle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810014352.0A CN108211051B (en) | 2018-01-08 | 2018-01-08 | Needle-replaceable retractable safety syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108211051A CN108211051A (en) | 2018-06-29 |
| CN108211051B true CN108211051B (en) | 2024-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810014352.0A Active CN108211051B (en) | 2018-01-08 | 2018-01-08 | Needle-replaceable retractable safety syringe |
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| Country | Link |
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| CN (1) | CN108211051B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108014397B (en) * | 2017-12-07 | 2019-08-30 | 杨德怡 | Syringe |
| AU2018316355B2 (en) * | 2018-08-30 | 2020-07-30 | Jiangsu Caina Medical Co., Ltd | Safety syringe |
| CN111840709A (en) * | 2020-08-27 | 2020-10-30 | 汕头华尔怡医疗器械有限公司 | Needle tube structure and injector with same |
| CN115252966B (en) * | 2022-08-03 | 2023-12-26 | 四川大学华西第二医院 | Composite injector |
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| WO2006096909A1 (en) * | 2005-03-14 | 2006-09-21 | Global Medisafe Holdings Limited | Auto retractable syringe |
| CN101195050A (en) * | 2006-12-06 | 2008-06-11 | 文代久 | Disposal medical automatic retraction safety syringe |
| CN201701572U (en) * | 2010-06-24 | 2011-01-12 | 张亚平 | Medical safety syringe |
| CN104027874A (en) * | 2014-06-19 | 2014-09-10 | 杨育和 | Retractable type safe injection syringe with changeable needle |
| CN208678077U (en) * | 2018-01-08 | 2019-04-02 | 杨德怡 | A kind of changing needle hair style retractable safety injector |
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2018
- 2018-01-08 CN CN201810014352.0A patent/CN108211051B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006096909A1 (en) * | 2005-03-14 | 2006-09-21 | Global Medisafe Holdings Limited | Auto retractable syringe |
| CN101195050A (en) * | 2006-12-06 | 2008-06-11 | 文代久 | Disposal medical automatic retraction safety syringe |
| CN201701572U (en) * | 2010-06-24 | 2011-01-12 | 张亚平 | Medical safety syringe |
| CN104027874A (en) * | 2014-06-19 | 2014-09-10 | 杨育和 | Retractable type safe injection syringe with changeable needle |
| WO2015192485A1 (en) * | 2014-06-19 | 2015-12-23 | 杨育和 | Retractable safe syringe with changeable needle |
| CN208678077U (en) * | 2018-01-08 | 2019-04-02 | 杨德怡 | A kind of changing needle hair style retractable safety injector |
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| Publication number | Publication date |
|---|---|
| CN108211051A (en) | 2018-06-29 |
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Effective date of registration: 20190523 Address after: 515064 jinring North Road, Shantou, Guangdong (Qishan Middle School Road) Applicant after: SHANTOU WEALY MEDICAL INSTRUMENT Co.,Ltd. Address before: 518000 E09 Building, 5 Floors, 9 Skirt Buildings, Shenzhen Bay Science and Technology Eco-Park, Yuehai Street, Nanshan District, Shenzhen City, Guangdong Province Applicant before: Yang Deyi |
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