CN106964027B - Interface of injection device of medical injector - Google Patents

Interface of injection device of medical injector Download PDF

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Publication number
CN106964027B
CN106964027B CN201710345517.8A CN201710345517A CN106964027B CN 106964027 B CN106964027 B CN 106964027B CN 201710345517 A CN201710345517 A CN 201710345517A CN 106964027 B CN106964027 B CN 106964027B
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CN
China
Prior art keywords
cavity
circumferential
outer sleeve
core rod
conical
Prior art date
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Active
Application number
CN201710345517.8A
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Chinese (zh)
Other versions
CN106964027A (en
Inventor
张奕奕
张祖仁
徐维华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Boqia Medical Devices Co ltd
Original Assignee
Shanghai Boqia Medical Devices Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Boqia Medical Devices Co ltd filed Critical Shanghai Boqia Medical Devices Co ltd
Priority to CN201710345517.8A priority Critical patent/CN106964027B/en
Publication of CN106964027A publication Critical patent/CN106964027A/en
Priority to PCT/CN2017/109253 priority patent/WO2018209899A1/en
Priority to US16/082,169 priority patent/US11154664B2/en
Application granted granted Critical
Publication of CN106964027B publication Critical patent/CN106964027B/en
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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
    • 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
    • A61M5/30—Syringes for injection by jet action, without needle, e.g. for use with replaceable ampoules or carpules
    • 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
    • A61M5/32—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
    • 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
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • 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
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/27—General characteristics of the apparatus preventing use
    • A61M2205/273—General characteristics of the apparatus preventing use preventing reuse, e.g. of disposables

Abstract

The interface of the injection apparatus of a medical syringe, realize and make up the interface of the injection apparatus by conical head and conical bevel of the overcoat and conical lip and tapered hole of the injection apparatus, when the tapered hole of the syringe needle is inserted on the conical head of the overcoat, the syringe needle is fixed on conical head of the overcoat, achieve and prevent the needle point of the syringe needle from taking place the swing purpose while piercing the syringe needle into human muscle or blood vessel, thus avoid causing the misoperation; after the syringe is used, the conical lip of the injection needle far away from the injection needle head is pinched to flatten, the injection needle can be separated from the conical head of the outer sleeve of the syringe, the injection needle with bacteria can be placed into the collecting box, the injection needle with bacteria can be collected into the appliance cavity of the core rod of the syringe, the purpose of avoiding the contact with the needle head in the operation process is achieved, and therefore the injection needle with bacteria is prevented from injuring the human body.

Description

Interface of injection device of medical injector
Technical Field
The invention relates to various medical syringes, in particular to various disposable sterile syringes, in particular to disposable sterile syringes prefilled with liquid medicines, more particularly to various self-destruction disposable sterile syringes, more particularly to self-destruction disposable sterile syringes prefilled with liquid medicines, still more particularly to various safety disposable sterile syringes, still more particularly to safety disposable sterile syringes prefilled with liquid medicines, still more particularly to various safety disposable sterile syringes prefilled with liquid medicines, and still more particularly to various safety disposable sterile syringes prefilled with liquid medicines.
Background
Various medical syringes may be used for injecting and delivering various liquids, for aspirating various liquids, for mixing various liquids or various liquids with powders, for aspirating liquids or mixing various liquids or liquids with powders in containers, and for rinsing or cleaning objects. After the injection needle is inserted into the conical head of various medical injectors, various medicaments can be injected into the subcutaneous tissues, muscles, blood vessels or other tissues and organs of human bodies or animals, and various liquids can be sucked from the tissues and organs of the human bodies or the animals. After the spray head is inserted on the conical head of various medical injectors, various medicaments can be sprayed on the mucous membrane or other tissues and organs of human bodies or animals.
Conventional medical injectors are known that include an outer sheath and a core rod. The outer sleeve has sufficient transparency. The outer sleeve is provided with an outer sleeve cavity. The cavity of the outer sleeve is respectively opened at the front end and the rear end of the outer sleeve. The front end of the cavity of the outer sleeve is provided with a sealing bottom. The front end of the sealing bottom of the cavity of the outer sleeve is provided with a conical head. The conical head of the outer sleeve can be an outer conical joint and can also be an outer conical locking joint. The conical head of the outer sleeve can be a middle-head type conical head or an inclined-head type conical head. The conical head is internally provided with a conical head hole. The conical head hole is communicated with the cavity of the outer sleeve. The jacket bead is provided at the rear of the jacket. A capacity scale is provided on the outer surface of the jacket. The rear end of the core rod is provided with a press handle, and the front part is provided with a sealing ring. After a sealing ring of the core rod is inserted into the outer sleeve cavity from the opening at the rear end of the outer sleeve cavity, the sealing ring can move back and forth in the outer sleeve cavity by operating a press hand of the core rod, and the outer wall of the sealing ring is in sealing fit with the inner wall of the outer sleeve cavity.
The first dissatisfaction of the conventional medical injector is that after the disposable sterile injector is used, the injection needle with bacteria is exposed outside, which is very easy to cause serious infection injury to human body, and the actions of detaching the needle head with two hands and closing the needle head by the sheath are the highest risk actions of causing needle stick injury to medical personnel because the needle head is tightly jointed with the conical head of the outer sleeve of the injector. The world health organization WHO reported 1999 that every 30 seconds a health care worker was pricked with a contaminated needle. A second dissatisfaction is that the single-use sterile syringe and the sheathed needle are placed separately in the packaging; when in use, the injector is taken out of the packaging box, the injection needle with the sheath is taken out of the packaging box, and the injection needle is arranged on the injector after the sheath is removed; after the injection needle is used, the injection needle needs to be taken down from the injector, and then the sheath is found to cover the injection needle, or the sheath is directly used to cover the injection needle arranged on the injector, so that the naked injection needle is prevented from injuring human bodies; the whole operation process is troublesome, and the injury to users is very easy to occur. A third dissatisfaction is that the health of the human body is compromised by the repeated use of disposable sterile syringes after use.
After the safety disposable sterile syringes described in US20120296277A1, US20150174339A1, US20150314079A1, US20160008554A1 and US20160271340A1 are used, the injection needle with bacteria is collected into the cavity of the outer cover of the syringe by various methods, so as to avoid serious injury to human body caused by injection with bacteria. A first dissatisfaction with the medical injectors described above is that the parts of the safety single-use sterile injectors are more complex than those of the conventional single-use sterile injectors, the overall size of the medical injector is larger, the assembly is more difficult, and therefore the production costs are much higher. The second dissatisfaction of the above medical syringes is that the safety disposable sterile syringe has a plurality of parts in the liquid-filled chamber, and it is difficult to completely remove the gas in the liquid-filled chamber of the syringe during liquid filling, which can cause air embolism in the blood vessel of human body and harm to human body. The third unsatisfactory point of the above medical syringes is that after the safety disposable sterile syringe is used, most of the core rod extends out of the outer sleeve, so that the whole volume after use is large, and the subsequent destruction treatment is troublesome. A fourth unsatisfactory point of the above medical syringes is that the needle of the safety disposable sterile syringe is in clearance fit with the sheath, and when the needle of the disposable sterile syringe is inserted into the muscle and blood vessel of the human body, the needle tip of the needle is liable to swing, which causes misoperation.
It is obvious from the above that the known medical injector needs to be further improved, so that the production cost of the medical injector is lower, the medical injector is safer and more convenient to use, and the medical injector is easier to destroy after use.
Disclosure of Invention
The invention provides a medical injector, which realizes that an interface of an injection device is formed by a conical head and a conical inclined plane of an outer sleeve and a conical lip edge and a conical hole of the injection device of an injection needle or an atomizing spray head; after the medical injector is used, the conical lip of the injection needle far away from the injection needle head is pinched to flatten the conical lip, the injection needle can be separated from the conical head of the outer sleeve of the medical injector, the injection needle with bacteria can be placed into the collecting box, the injection needle with bacteria can be collected into the appliance cavity of the core rod of the medical injector, the purpose of avoiding the contact with the needle head in the operation process is achieved, and therefore the injection needle with bacteria is prevented from hurting a human body.
The second purpose of the invention is to provide a medical injector, which realizes that one side of the core rod is provided with a device cavity which is laterally opened and can be used for placing an injection device, and the pressing hand of the core rod is provided with a notch at one side of the device cavity. Before the medical injector is used, the injection device is placed into the device cavity of the core rod; when the medical injector is used, the conical lip of the injection device placed in the device cavity of the core rod is pinched at the notch of the press hand of the core rod, and the injection device is taken out from the lateral opening of the device cavity; after the medical injector is used, the injection device inserted on the conical head of the outer sleeve is taken down, the injection device is placed into the device cavity of the core rod from the lateral opening of the device cavity, then the core rod is pushed to the bottom, most of the core rod enters the outer sleeve, and the purpose that the finally formed safe medical injector is small in overall volume is achieved, so that convenience is brought to subsequent destroying treatment.
The third purpose of the invention is to provide a medical injector, which realizes that the rear part of the cavity of the outer sleeve is provided with an inward convex locking circumferential lug, the periphery of the core rod is provided with a locking circumferential groove, and the locking circumferential lug in the cavity of the outer sleeve can elastically deform to pass over the locking circumferential lug of the core rod and enter the locking circumferential groove of the core rod. After the medical injector is used, once the expected disposable use process is finished, the function of preventing reuse is automatically started, the outer sleeve of the medical injector and the core rod are locked together, then the conical lip of the injection needle far away from the needle head is pinched flat, the injection needle can be separated from the conical head of the outer sleeve of the medical injector, and then the injection needle with bacteria is placed into the collection box; for the use requirement that the core bar can be used for multiple times of suction before single injection, once the expected disposable use process is finished, the conical lip edge of the injection needle far away from the needle head is pinched flat, the injection needle can be separated from the conical head of the outer sleeve of the medical injector, the injection needle with bacteria can be placed into the collection box, the injection needle with bacteria can also be collected into the instrument cavity of the core bar of the medical injector, then the function of preventing reuse is selectively and manually started, and the outer sleeve and the core bar of the medical injector are locked together or not; the purpose that the needle head can not be contacted in the operation process is achieved, so that serious injury to a human body caused by injection with bacteria can be avoided, and repeated use can be avoided.
The invention also provides a medical injector, which realizes that the rear part of the outer sleeve cavity is provided with an inward convex positioning circumferential convex block, and the periphery of the core rod is provided with a positioning axial convex block and a plurality of positioning circumferential grooves which are distributed along the axial direction of the core rod. When the core rod is rotated to enable the positioning circumferential lug in the outer sleeve cavity to elastically deform to cross the positioning axial lug of the core rod and enter the selected positioning circumferential groove of the core rod, a cavity between the sealing ring of the core rod and the bottom sealing part of the outer sleeve cavity is restrained in the outer sleeve cavity to form the selected liquid filling capacity of the medical injector; when the core rod is rotated to enable the positioning circumferential lug in the cavity of the outer sleeve to elastically deform and move out of the positioning circumferential groove of the core rod beyond the positioning circumferential groove of the core rod, the button of the core rod is operated to enable the sealing ring to move back and forth in the cavity of the outer sleeve; the aim that the liquid filling amount of the medical injector can be accurately locked is fulfilled.
The fifth purpose of the invention is to provide a medical injector, which realizes that the parts of the safe disposable sterile injector or the safe self-destruction disposable sterile injector are one less part of the sheath of the injection needle than the parts of the conventional disposable sterile injector.
The purpose of the invention is realized by the following technical scheme:
the medical injector of the invention comprises an outer sleeve and a core rod. The outer sleeve has sufficient transparency. The outer sleeve is provided with an outer sleeve cavity. The cavity of the outer sleeve is respectively opened at the front end and the rear end of the outer sleeve. The front end of the cavity of the outer sleeve is provided with a sealing bottom. The front end of the sealing bottom of the cavity of the outer sleeve is provided with a conical head. The conical head of the outer sleeve can be an outer conical joint, an outer conical locking joint, a middle-head conical head or a head-deviating conical head. The conical head is internally provided with a conical head hole. The conical head hole is communicated with the cavity of the outer sleeve. The jacket bead is provided at the rear of the jacket. A capacity scale is provided on the outer surface of the jacket. The rear end of the core rod is provided with a press handle, and the front part is provided with a sealing ring. The sealing ring can be made into an integral type with the core rod or a split type with the core rod. After a sealing ring of the core rod is inserted into the outer sleeve cavity from the opening at the rear end of the outer sleeve cavity, the sealing ring can move back and forth in the outer sleeve cavity by operating a press hand of the core rod, and the outer wall of the sealing ring is in sealing fit with the inner wall of the outer sleeve cavity.
The conical head of the outer sleeve of the medical injector can be inserted with a syringe needle, a spray head or other various injection devices. The back end of the conical head of the outer sleeve is provided with a conical inclined plane. The rear of the injection device has a tapered lip and a tapered bore. The tapered lip of the injection device is located at the rear of the tapered bore. Axial grooves may be distributed in the wall of the conical lip of the injection device. The generatrix of the taper of the tapered lip may be straight or curved. The conical head and the conical inclined plane of the outer sleeve and the conical lip edge and the conical hole of the injection device form an interface of the injection device. When the conical hole of the injection device is inserted into the conical head of the outer sleeve, the injection device is fixed on the conical head of the outer sleeve. When the conical lip of the injection device is pinched flat, the conical lip moves along the conical inclined surface at the rear end of the conical head of the outer sleeve, so that the conical lip pushes the injection device to move forwards, and the conical hole of the injection device is separated from the conical head of the outer sleeve.
One side of the core rod of the medical injector of the present invention may have a laterally open device cavity. An injection device with an injection needle or a spray head can be placed in the device cavity. The rear end of the appliance cavity is provided with an intra-cavity circumferential groove. The circumferential width at the lateral opening of the circumferential groove in the cavity of the tool cavity is less than the diameter of the tapered lip of the injection tool and the diameter of the circumferential groove in the cavity of the tool cavity. The plunger may have a notch in the side of the plunger that is located in the cavity of the device. When the injection device is placed into the device cavity of the core rod, the tapered lip of the injection device elastically deforms to pass over the lateral opening of the circumferential groove in the cavity of the device cavity and enter the circumferential groove in the cavity of the device cavity, so that the tapered lip of the injection device is restrained in the circumferential groove in the cavity of the device cavity, and the injection device is restrained in the device cavity. The injection device is placed into the device cavity of the core rod before the medical injector is used. When the medical injector is used, the conical lip of the injection device placed in the device cavity of the core rod is pinched at the notch of the press hand of the core rod, the injection device is taken out from the lateral opening of the device cavity, and the conical hole of the injection device is inserted into the conical head of the outer sleeve, so that the injection device is fixed on the conical head of the outer sleeve. After the medical injector is used, the injection device inserted on the conical head of the outer sleeve is taken down, and then the injection device is placed into the device cavity of the core rod from the lateral opening of the device cavity.
The rear part of the jacket cavity of the medical injector can be provided with an inward convex positioning circumferential lug. The two axial sides of the positioning circumferential lug are respectively provided with a lug axial restraining inclined plane. The two sides of the circumferential direction of the positioning circumferential lug are respectively provided with a lug circumferential direction restraining inclined plane. The periphery of the core rod can be provided with a positioning circumferential groove. The plurality of positioning circumferential grooves are distributed along the axial direction of the core rod. Axial constraint inclined planes are respectively arranged on the two axial sides of each positioning circumferential groove. The circumferential two sides of each positioning circumferential groove are respectively provided with a groove circumferential restraining inclined plane. And the circumferential side surface of the positioning circumferential groove is provided with a positioning axial convex block. The circumferential side surface of the positioning axial lug is provided with a lug circumferential restraining inclined plane. When the core rod is rotated to enable the positioning circumferential lug in the outer sleeve cavity to elastically deform and cross the lug circumferential constraint inclined plane of the positioning axial lug of the core rod to enter the selected positioning circumferential groove of the core rod, the two groove circumferential constraint inclined planes of the selected positioning circumferential groove of the core rod are respectively mutually constrained with the two lug circumferential constraint inclined planes of the positioning circumferential lug in the outer sleeve cavity to prevent the core rod from rotating in the outer sleeve cavity, the two groove axial constraint inclined planes of the selected positioning circumferential groove of the core rod are respectively mutually constrained with the two lug axial constraint inclined planes of the positioning circumferential lug in the outer sleeve cavity to prevent the sealing ring of the core rod from moving back and forth in the outer sleeve cavity, and a cavity between the front end of the sealing ring of the core rod constrained in the outer sleeve cavity and the bottom sealing part of the outer sleeve cavity forms the selected liquid filling capacity of the medical injector. When the core rod is rotated to enable the positioning circumferential lug in the outer sleeve cavity to elastically deform and cross the groove circumferential restraining inclined plane of the positioning circumferential groove of the core rod to move out of the positioning circumferential groove of the core rod, the lug circumferential restraining inclined plane of the positioning axial lug of the core rod prevents the positioning circumferential lug in the outer sleeve cavity from entering the positioning circumferential groove of the core rod, and the sealing ring can move back and forth in the outer sleeve cavity by operating a press hand of the core rod.
The back part of the jacket cavity of the medical injector can be provided with an inward convex locking circumferential lug. The axial direction of the locking circumferential lug is provided with a lug axial restraining inclined plane. The two sides of the circumferential direction of the locking circumferential convex block are respectively provided with a convex block circumferential direction restraining inclined plane. The periphery of the core rod can be provided with a locking circumferential groove. The axial direction of locking circumference recess is fluted axial restraint inclined plane. The circumferential two sides of the locking circumferential groove are respectively provided with a groove circumferential restraining inclined plane. And the circumferential side surface of the locking circumferential groove is provided with a locking axial convex block. When the core rod is rotated to enable the locking circumferential lug in the outer sleeve cavity to elastically deform and cross the locking axial lug of the core rod to enter the locking circumferential groove of the core rod, the groove axial constraint inclined plane of the locking circumferential groove of the core rod and the lug axial constraint inclined plane of the locking circumferential lug in the outer sleeve cavity are mutually constrained, and the two groove circumferential constraint inclined planes of the locking circumferential groove of the core rod are respectively mutually constrained with the two lug circumferential constraint inclined planes of the locking circumferential lug in the outer sleeve cavity, so that the core rod is locked on the outer sleeve cavity.
The back part of the jacket cavity of the medical injector can be provided with an inward convex locking circumferential lug. The axial direction of the locking circumferential lug is provided with a lug axial restraining inclined plane. The two sides of the circumferential direction of the locking circumferential convex block are respectively provided with a convex block circumferential direction restraining inclined plane. The periphery of the core rod can be provided with a locking circumferential groove. The axial direction of locking circumference recess is fluted axial restraint inclined plane. The circumferential two sides of the locking circumferential groove are respectively provided with a groove circumferential restraining inclined plane. The axial side of the locking circumferential groove is provided with a locking circumferential convex block. After the locking circumferential lug in the outer sleeve cavity is elastically deformed to cross the locking circumferential lug and enter the locking circumferential groove of the core rod by pushing the core rod, the groove axial constraint inclined plane of the locking circumferential groove of the core rod and the lug axial constraint inclined plane of the locking circumferential lug in the outer sleeve cavity are mutually constrained, and the two groove circumferential constraint inclined planes of the locking circumferential groove of the core rod are respectively mutually constrained with the two lug circumferential constraint inclined planes of the locking circumferential lug in the outer sleeve cavity, so that the core rod is locked on the outer sleeve cavity.
The jacket of the medical injector of the present invention may include a liquid-filled bottle and an outer cover. The liquid-filled bottle is provided with a first coat cavity. The first jacket cavity is open at the front and rear ends, respectively. The front part of the first outer sleeve cavity is provided with a sealing bottom. The front end of the sealing bottom part of the first outer sleeve cavity is provided with a conical head. The conical head is internally provided with a conical head hole. The conical head hole is communicated with the first outer sleeve cavity. The housing has a second housing cavity. The second housing cavity is open at the front and rear ends of the housing, respectively. The rear portion of the second housing cavity has an inwardly projecting snap, an inwardly projecting circumferential projection and an outwardly extending housing bead. When the second outer sleeve cavity of the outer cover is wrapped on the periphery of the liquid filling bottle, the buckle of the second outer sleeve cavity of the outer cover is hooked on the edge of the rear end of the liquid filling bottle, the liquid filling bottle is locked in the second outer sleeve cavity of the outer cover, and the conical head of the liquid filling bottle extends out of the opening at the front end of the outer cover. When the sealing ring of the core rod is inserted into the first outer sleeve cavity from the opening at the rear end of the second outer sleeve cavity, the sealing ring can move back and forth in the first outer sleeve cavity by operating the press hand of the core rod, and the outer wall of the sealing ring is in sealing fit with the inner wall of the first outer sleeve cavity.
An injection instrument of an injection needle or an atomizing head can be inserted on the conical head at the front end of the sealing bottom of the first jacket cavity of the liquid filling bottle. The opening at the front end of the outer cover can be provided with a conical inclined plane with a large inclination angle. When the conical hole of the injection device is inserted on the conical head of the liquid charging bottle, the injection device is fixed on the conical head of the liquid charging bottle. When the conical lip edge of the injection device is pinched flat, the conical lip edge moves along the conical inclined plane at the front end opening of the outer cover, and the conical lip edge pushes the injection device to move forwards, so that the conical hole of the injection device is separated from the conical head of the liquid charging bottle.
Drawings
FIG. 1 is a front elevational view of a safety self-destructive medical injector illustrating a first embodiment of the present invention, prior to use;
FIG. 2 is a front view of the medical injector of FIG. 1 shown with a needle being removed or inserted;
FIG. 3 is a rear view of FIG. 2;
FIG. 4 is a front elevational view of the medical injector of FIG. 1 shown ready for use;
FIG. 5 is a rear view illustrating the medical injector of FIG. 1 in a self-locking state;
FIG. 6 is a cross-sectional view taken along line 6-6 of FIG. 5;
FIG. 7 is a sectional view taken from 7 to 7 in FIG. 5;
FIG. 8 is an external view showing a core bar of the medical injector of FIG. 1;
FIG. 9 is an external view showing the back side of FIG. 8;
fig. 10 is an external view showing a sheath of the medical injector of fig. 1;
fig. 11 is an external view showing an injection needle of the medical injector of fig. 1;
FIG. 12 is a front view showing the needle of FIG. 11 inserted into the stem of FIG. 8;
FIG. 13 is a rear view showing an alternative core pin;
fig. 14 is a front elevational view showing the medical injector with the first embodiment of the spray head deployed, prior to use;
fig. 15 is a front view showing the medical injector of fig. 14 with the spray head installed;
FIG. 16 is an external view of the spray head of FIG. 15;
fig. 17 is a front view showing the spray head of fig. 16 positioned within the core pin of fig. 8;
FIG. 18 is an external view illustrating a safety self-destruction medical syringe in a state in which a liquid medicine is injected in accordance with a second embodiment of the present invention;
fig. 19 is an external view showing the medical injector of fig. 18 when it is ready to be used;
fig. 20 is a top view showing the medical injector of fig. 18;
FIG. 21 is a cross-sectional view taken generally from 21 to 21 of FIG. 20;
FIG. 22 is a cross-sectional view taken generally from 22 to 22 of FIG. 20;
FIG. 23 is a front elevational view of the medical injector of FIG. 18 shown after use;
FIG. 24 is a front elevational view of the medical injector of FIG. 18 showing the needle disposed within the plunger rod;
fig. 25 is an external view showing the medical injector of fig. 18 in a self-locking state;
FIG. 26 is an external view showing the back side of FIG. 25;
FIG. 27 is an external view showing an end seal cap of the medical injector of FIG. 18;
FIG. 28 is an external view showing a core bar of the medical injector of FIG. 18;
fig. 29 is an external view showing the back side of fig. 28;
fig. 30 is an external view showing a sheath of the medical injector of fig. 18;
FIG. 31 is an external view showing the back side of FIG. 30;
fig. 32 is a front elevational view of a medical injector showing a second embodiment of a medical injector mounting spray head;
FIG. 33 is an external view of a safety medical injector according to a third embodiment of the present invention, shown prior to use;
fig. 34 is an external view showing the medical injector of fig. 33 when it is ready to be used;
FIG. 35 is a front elevational view showing the needle being inserted into the core pin of the medical injector of FIG. 33;
fig. 36 is a front view showing a sheath of the medical injector of fig. 33;
FIG. 37 is a left side elevational view of the outer cover of FIG. 36;
FIG. 38 is an external view of a fourth embodiment of the safety medical injector of the present invention shown prior to use;
fig. 39 is an external view showing the medical injector of fig. 38 when it is ready to be used;
fig. 40 is a front view showing the housing of the medical injector of fig. 38;
FIG. 41 is an external view showing the cover of FIG. 40;
fig. 42 is a front view illustrating a liquid charging bottle of the medical syringe of fig. 38;
fig. 43 is an external view showing the liquid charging bottle of fig. 42;
fig. 44 is an external view showing a sheath of the medical injector of fig. 38;
FIG. 45 is an external view showing a core rod of the medical injector of FIG. 38;
fig. 46 is an external view showing the needle insertion core rod of the medical injector of fig. 38.
Detailed Description
Preferred embodiments of the medical injector of the present invention will now be described, by way of example, with reference to the accompanying drawings. The scope of the invention is indicated in the claims. It is to be understood that some or all of the figures are diagrammatic illustrations for purposes of illustrating a preferred embodiment of the invention and do not depict the actual dimensions of the portions shown. The actual manner in which the above-recited and other objects and advantages of the invention are obtained will be more clearly understood by reference to the detailed description of the preferred embodiments.
In the drawings and the following description, the terms "proximal" and "rear" refer to a location near the injector operator, while the terms "distal" and "front" refer to a location away from the injector operator. The term "axial" is with reference to the long axis direction of the outer jacket of the medical injector and the term "circumferential" is with reference to the circumferential direction of a radial cross-section of the outer jacket of the medical injector. Other positional and orientational terms may be understood in light of the drawings and the following description.
Fig. 1 to 12 show a safety self-destructive medical injector 1 according to a first embodiment of the present invention. The medical injector 1 comprises a jacket 2 and a core rod 3. The housing 2 (see fig. 1, 5, 6 and 10) has a housing cavity 4. The jacket cavity 4 is open 5 at the rear end of the jacket 2. The front end of the housing cavity 4 has a back cover 6. The front end of the back cover part 6 of the jacket cavity 4 is provided with a middle-head type conical head 7. The conical head 7 is internally provided with a conical head hole 8. The conical head hole 8 is communicated with the jacket cavity 4 to form a front end opening of the jacket 2. At the rear of the outer sleeve 2 there is an outer sleeve bead 9. On the outer surface of the casing 2 there is a capacity scale 10. The core rod 3 (see fig. 8, 9 and 12) has a press handle 11 at the rear end and a sealing ring 12 at the front. After the sealing ring 12 of the core rod 3 is inserted into the outer sleeve cavity 4 from the opening 5 at the rear end of the outer sleeve cavity 4, the pressing hand 11 of the core rod 2 is operated to enable the sealing ring 12 to move back and forth in the outer sleeve cavity 4, and the outer wall 13 of the sealing ring 12 is in sealing fit with the inner wall 14 of the outer sleeve cavity 4 to form the medical injector 1.
An injection needle 15 (see fig. 4) can be inserted into the conical head 7 of the outer sleeve 2. The rear end of the conical head 7 of the jacket 2 has a conical bevel 16 with a large inclination (see fig. 1 to 3). The rear of the needle 15 has a tapered lip 17 and a tapered bore 18 (see fig. 11). The tapered lip 17 of the injection needle 15 is located at the rear of the tapered bore 18. The wall of the conical lip 17 of the needle 15 is provided with an axial groove 19. The groove 19 in the tapered lip 17 of the needle 15 both increases the friction of the tapered lip 17 and facilitates pinching of the tapered lip 17. The conical head 7 and conical bevel 16 of the casing 2 and the conical lip 17 and conical hole 18 of the injection needle 15 constitute the interface of the injection needle 15. When the tapered hole 18 of the injection needle 15 is inserted on the tapered head 7 of the sheath 2, the injection needle 15 is fixed on the tapered head 7 of the sheath 2 (see fig. 4). When the conical lip 17 of the injection needle 15 is pinched flat, the conical lip 17 moves along the conical slope 16 at the rear end of the conical head 7, so that the conical lip 17 pushes the injection needle 15 forward, so that the conical hole 18 of the injection needle 15 is disengaged from the conical head 7 of the outer sleeve 2.
Core pin 3 has a laterally open device cavity 20 on one side. An injection needle 15 (see fig. 12) can be placed in the instrument lumen 20. The rearward end of the instrument lumen 20 has a lumen circumferential groove 21 (see fig. 8). The circumferential width at the lateral opening of the intra-cavity circumferential groove 21 of the instrument cavity 20 is smaller than the diameter of the tapered lip 17 of the injection needle 15 and the diameter of the intra-cavity circumferential groove 21 of the instrument cavity 20. The push handle 11 of the plunger 3 has a recess 22 on the side of the injection needle 15 (see fig. 8). When the injection needle 15 is placed into the device cavity 20 of the core pin 3, the tapered lip 17 of the injection needle 15 is elastically deformed over the lateral opening of the intra-cavity circumferential groove 21 of the device cavity 20 into the intra-cavity circumferential groove 21 of the device cavity 20 so that the tapered lip 17 of the injection needle 15 is constrained within the intra-cavity circumferential groove 21 of the device cavity 20, constraining the injection needle 15 within the device cavity 20 (see fig. 12). Before the medical injector 1 is used, the injection needle 15 is inserted into the device cavity 20 of the plunger rod 3 (see fig. 1). When the medical injector 1 is used, the conical lip 17 of the injection needle 15 inserted into the device cavity 20 of the plunger 3 is pinched at the notch 22 of the knob 11 of the plunger 3 (see fig. 2), the injection needle 15 is removed from the lateral opening of the device cavity 20, and the conical hole 18 of the injection needle 15 is inserted into the conical head 7 of the sheath 2, so that the injection needle 15 is fixed to the conical head 7 of the sheath 2 (see fig. 4). After the medical injector 1 is used, the injection needle 15 inserted into the conical head 7 of the outer sleeve 2 is removed, and the injection needle 15 is inserted into the instrument cavity 20 of the core rod 3 from the lateral opening of the instrument cavity 20 (see fig. 2).
The rear of the housing cavity 4 has an inwardly projecting locking circumferential projection 23 (see fig. 10). The locking circumferential lug 23 in the housing cavity 4 is axially provided with a large-inclination-angle lug axial restraining inclined surface 24, and the two circumferential sides of the locking circumferential lug 23 are respectively provided with large-inclination-angle lug circumferential restraining inclined surfaces 25 and 26. The outer periphery of the core rod 3 has a locking circumferential groove 27 (see fig. 3 and 9). The locking circumferential groove 27 has a large-inclination-angle groove axial restraint slope 28 in the axial direction. The locking circumferential groove 27 is circumferentially flanked by large-inclination-angle groove circumferential restraint inclined surfaces 29 and 30, respectively. The locking circumferential groove 27 has a locking axial projection 31 on its circumferential side. The lateral surfaces of the locking axial projections 31 are provided with a small-inclination projection circumferential constraining inclined surface 32 and a large-inclination circumferential constraining inclined surface 33, respectively. Before the medical injector 1 is used, the large-inclination-angle projection circumferential-restriction slopes 33 of the locking axial projections 31 of the core rod 3 prevent the circumferential projections 23 in the jacket cavity 4 from deviating from the locking axial projections 31 (see fig. 3). After the medical injector 1 is used, the injection needle 15 inserted on the conical head 7 of the outer sleeve 2 is taken down, the injection needle 15 is placed in the device cavity 20 of the core rod 7, at the moment, the core rod 3 is rotated to enable the locking circumferential lug 23 in the outer sleeve cavity 4 to elastically deform to cross the small-inclination-angle lug circumferential restraining inclined plane 32 of the locking axial lug 31 of the core rod 3, after the injection needle enters the locking circumferential groove 27 of the core rod 3, the large-inclination-angle groove axial restraining inclined plane 28 of the locking circumferential groove 27 of the core rod 3 and the large-inclination-angle lug axial restraining inclined plane 24 of the locking circumferential lug 23 in the outer sleeve cavity 4 are mutually restrained, and the two large-inclination-angle groove circumferential restraining inclined planes 29 and 30 of the locking circumferential groove 27 of the core rod 3 and the two large-inclination-angle lug circumferential restraining inclined planes 25 and 26 of the locking circumferential lug 23; at the same time, the locking circumferential projection 23 in the housing cavity 4 elastically deforms, giving an audible indication that the plunger 3 and the injection needle 15 inserted into the device cavity 20 of the plunger 3 have been locked in the housing 4 (see fig. 5 to 7).
The core rod 3 in the medical injector 1 can also be replaced by a core rod 34 (see fig. 13). The core pin 34 has a locking circumferential groove 35 (see fig. 13) on its outer periphery. The locking circumferential groove 35 has a large-inclination-angle groove axial restraint inclined surface 36 in the axial direction. The locking circumferential groove 35 is circumferentially flanked by large-inclination-angle groove circumferential restraint inclined surfaces 37 and 38. The axial side of the locking circumferential groove 35 has a locking circumferential projection 39. The lateral surface of the locking circumferential projection 39 has a small-pitch projection axial constraint ramp 40. When the core rod 34 is pushed to enable the locking circumferential protrusion 23 in the outer sleeve cavity 4 to elastically deform to cross the small-inclination-angle protrusion axial restraining inclined plane 40 of the locking circumferential protrusion 39 of the core rod 34 and enter the locking circumferential groove 35 of the core rod 34, the large-inclination-angle groove axial restraining inclined plane 36 of the locking circumferential groove 35 of the core rod 34 and the large-inclination-angle protrusion axial restraining inclined plane 24 of the locking circumferential protrusion 23 in the outer sleeve cavity 4 are mutually restrained, and the two large-inclination-angle groove circumferential restraining inclined planes 37 and 38 of the locking circumferential groove 35 of the core rod 34 and the two large-inclination-angle protrusion circumferential restraining inclined planes 25 and 26 of the locking circumferential protrusion 23 in the outer sleeve cavity 4 are mutually restrained respectively; at the same time, the locking circumferential projection 23 in the jacket cavity 4 is elastically deformed, which gives an audible indication that the core rod 34 has been locked in the jacket cavity 4.
The injection needle 15 in the medical injector 1 may be replaced with the atomizing head 41. The rear of the spray head 41 has a tapered lip 42 and a tapered bore 43 (see fig. 16). The tapered lip 42 of the spray head 41 is located rearwardly of the tapered bore 43. An axial recess 44 is provided in the wall of the tapered lip 42 of the spray head 41. Before the medical injector 1 is used, the spray head 41 is inserted into the device chamber 20 of the plunger rod 3 (see fig. 14). When the spray head 41 is attached to the medical injector 1, the spray head 41 inserted into the instrument cavity 20 of the stem 3 is removed, and then the tapered hole 43 of the spray head 41 is inserted into the tapered end 7 of the outer sheath 2, so that the spray head 41 is fixed to the tapered end 7 of the outer sheath 2 (see fig. 15). After the medical injector 1 is used, the spray head 41 inserted into the conical head 7 is removed, and the spray head 41 is inserted into the instrument cavity 20 of the plunger rod 3 (see fig. 17).
Fig. 18 to 31 show a safety self-destructive medical syringe 50 filled with a medical fluid according to a second embodiment of the present invention. The medical injector 50 includes an outer sheath 51 and a core pin 52. The housing 51 (see fig. 21, 25, 30 and 31) has a housing cavity 53. The housing cavity 53 opens at the rear end 54 of the housing 51. The front end of the housing cavity 53 has a back cover 55. A middle-head type conical head 56 is arranged at the front end of the bottom sealing part 55 of the jacket cavity 53. The conical head 56 has a conical head bore 57 therein. The cone bore 57 is in communication with the jacket cavity 53. At the rear of the outer sleeve 51 is an outer sleeve bead 58. On the outer surface of the jacket 51 there is a capacity scale 59. The core rod 52 (see fig. 28 and 29) has a knob 60 at the rear end and a gasket 61 at the front. After the sealing ring 61 of the stem 52 is inserted into the sheath cavity 53 from the rear end opening 54 of the sheath cavity 53 (see fig. 21), the sealing ring 61 can be moved back and forth within the sheath cavity 53 by manipulating the knob 60 of the stem 51, and the outer wall 62 of the sealing ring 61 forms a sealing engagement with the inner wall 63 of the sheath cavity 53 for the medical injector 50.
The rear end of the conical head 56 of the outer sleeve 51 has a conical inclined surface 64 with a large inclination angle (see fig. 21 and 24 to 26). The rear of the cone cap 65 has a tapered lip 66 and a tapered bore 67 (see fig. 21 and 27). The tapered lip 66 of the cone cap 65 is located rearward of the tapered bore 67. When the tapered hole 67 of the conical head cap 65 is inserted into the conical head 56 of the outer sleeve 51, the conical head cap 65 is fixed to the conical head 56 of the outer sleeve 51 (see fig. 20 and 21). When the tapered lip 66 of the cone cap 65 is pinched off, the tapered lip 66 moves along the tapered slope 64 at the rear end of the cone 56, and the tapered lip 66 pushes the cone cap 65 forward, so that the tapered hole 67 of the cone cap 65 disengages from the cone 56 of the outer sleeve 51.
One side of the stem 52 (see fig. 19 and 28) has a laterally open instrument cavity 68. Needle 15 can be placed in the instrument lumen 68. At the rearward end of the instrument chamber 68 is an intra-chamber circumferential groove 69. The circumferential width at the lateral opening of the intra-cavity circumferential groove 69 of the instrument cavity 68 is less than the diameter of the tapered lip 17 of the injection needle 15 and the diameter of the intra-cavity circumferential groove 69 of the instrument cavity 68. The handle 60 of the plunger 52 has a notch 70 on the side of the needle 15. When needle 15 is placed in the core pin tool cavity 68 (see fig. 24), tapered lip 17 of needle 15 is elastically deformed over the lateral opening of the cavity inner circumferential groove 69 of tool cavity 68 and into cavity inner circumferential groove 69 of tool cavity 68 so that tapered lip 17 of needle 15 is constrained within cavity inner circumferential groove 69 of tool cavity 68, constraining needle 15 within tool cavity 68. Before the medical injector 50 is used (see fig. 18), the needle 15 is placed within the instrument cavity 68 of the core pin 52. When the medical injector 50 is used (see fig. 19), the tapered lip 17 of the needle 15 inserted into the instrument cavity 68 of the core rod 52 is pinched at the notch 70 of the knob 60 of the core rod 52, the needle 15 is removed from the lateral opening of the instrument cavity 68, and the tapered bore 20 of the needle 15 is inserted over the tapered end 56 of the outer sleeve 51, so that the needle 15 is fixed to the tapered end 56 of the outer sleeve 51. After the medical injector 50 is used (see fig. 24), the needle 15 inserted into the tapered end 56 of the outer sleeve 51 is removed, and the needle 15 is inserted into the instrument cavity 68 of the core pin 52 from the lateral opening of the instrument cavity 68.
The rear of the housing cavity 53 has an inwardly projecting locking circumferential projection 71 (see fig. 30). The locking circumferential projection 71 has a large-inclination-angle projection axial restraining slope 72 in the axial direction. The locking circumferential projection 71 is circumferentially flanked on both sides by large-inclination-angle projection circumferential restraint slopes 73 and 74, respectively. The core rod 52 has a locking circumferential groove 75 (see fig. 29) in its outer periphery. The locking circumferential groove 75 has a large-inclination groove axial restraint slope 76 in the axial direction. The locking circumferential groove 75 has large-inclination-angle groove circumferential restraint inclined surfaces 77 and 78 on both circumferential sides thereof, respectively. The locking circumferential groove 75 has a locking axial projection 79 on its circumferential side. The sides of the locking axial projections 79 have small rake projection circumferential restraint ramps 80. After the medical injector 50 is used, the injection needle 15 inserted into the conical head 56 of the outer sheath 51 is removed, and then the injection needle 15 is inserted into the instrument cavity 68 of the core rod 52 (see fig. 24), at this time, the core rod 52 is rotated to make the locking circumferential protrusion 71 in the outer sheath cavity 53 elastically deform to cross the small-inclination-angle protrusion circumferential restraining inclined surface 80 of the locking axial protrusion 79 of the core rod 52 and enter the locking circumferential groove 75 of the core rod 52, the large-inclination-angle groove axial restraining inclined surface 76 of the locking circumferential groove 75 of the core rod 52 and the large-inclination-angle protrusion axial restraining inclined surface 72 of the locking circumferential protrusion 71 in the outer sheath cavity 53 are restrained with each other, and the two large-inclination-angle groove circumferential restraining inclined surfaces 77 and 78 of the locking circumferential groove 75 of the core rod 52 are respectively restrained with the two large-inclination-angle protrusion circumferential restraining inclined surfaces 73 and 74 of the locking circumferential; at the same time, the locking circumferential projection 71 in the housing cavity 53 elastically deforms to provide an audible indication that the plunger 52 and the needle 15 disposed in the instrument cavity 68 of the plunger 52 are locked within the housing 51 (see fig. 25 and 26).
The rear of the housing cavity 53 has an inwardly projecting locating circumferential projection 81 (see figure 31). Axially opposite sides of the positioning circumferential projection 81 are projection axial restraint ramps 82 and 83, respectively. The positioning circumferential projection 81 has projection circumferential restraint slopes 84 and 85 on both circumferential sides thereof, respectively. The core rod 52 (see fig. 28) has a positioning circumferential groove 86 in its outer periphery. A plurality of positioning circumferential grooves 86 are distributed in an axial arrangement along the core rod 52. Axially opposite sides of each positioning circumferential groove 86 are groove axial restraint chamfers 87 and 88, respectively. Circumferentially both sides of each positioning circumferential groove 86 are respectively provided with groove circumferential restraint chamfers 89 and 90. The circumferential side of the positioning circumferential groove 86 has a positioning axial projection 91. The circumferential side of the positioning axial projection 91 has a projection circumferential restraining ramp 92. When the core rod 52 is rotated to elastically deform the positioning circumferential protrusion 81 in the outer sheath cavity 53 into the selected positioning circumferential groove 93 of the core rod 52 beyond the protrusion circumferential restraining slope 92 of the positioning axial protrusion 91 of the core rod 52 (see fig. 18 and 20 to 22), the two groove circumferential restraining slopes 96 and 97 of the selected positioning circumferential groove 93 of the core rod 52 are respectively restrained with the two protrusion circumferential restraining slopes 84 and 85 of the positioning circumferential protrusion 81 in the outer sheath cavity 53 to prevent the core rod 52 from rotating in the outer sheath cavity 53, the two groove axial restraining slopes 94 and 95 of the selected positioning circumferential groove 93 of the core rod 52 are respectively restrained with the two protrusion axial restraining slopes 82 and 83 of the positioning circumferential protrusion 81 in the outer sheath cavity 53 to prevent the seal ring 61 of the core rod 52 from moving back and forth in the outer sheath cavity 53, and a cavity between the front end of the seal ring 61 of the core rod 52 restrained in the outer sheath cavity 53 and the bottom sealing portion 55 of the outer sheath cavity 53 forms a medical cavity A selected fill volume of the syringe 50. After the positioning circumferential protrusion 81 in the outer sheath cavity 53 is elastically deformed by rotating the core rod 52 and moves out of the positioning circumferential groove 93 of the core rod 52 beyond the groove circumferential restraining slope 96 of the positioning circumferential groove 93 of the core rod 52 (fig. 19, 23 and 24), the protrusion circumferential restraining slope 92 of the positioning axial protrusion 91 of the core rod 52 prevents the positioning circumferential protrusion 81 in the outer sheath cavity 53 from entering the positioning circumferential groove 86 of the core rod 52, and the sealing ring 61 can move back and forth in the outer sheath cavity 53 by operating the pressing hand 60 of the core rod 52. During operation, the sound produced when the locating circumferential projection 81 within the housing cavity 53 elastically deforms indicates that the operating condition of the medical injector 50 has been changed.
The injection needle 15 in the medical injector 50 can be replaced with a spray head 41 (see fig. 32).
Fig. 33 to 37 show a safety medical injector 100 according to a third embodiment of the present invention. The medical injector 100 includes an outer sheath 101 and a core pin 102. The housing 101 (see fig. 36 and 37) has a housing cavity 103. The housing cavity 103 opens at the rear end 104 of the housing 101. The front end of the housing cavity 103 has a back cover 105. The front end of the bottom cover part 105 of the outer sleeve cavity 103 is provided with a head-biased conical head 106. The bit 106 has a bit hole 107 therein. The tapered bore 107 and the jacket cavity 103 communicate to form a front end opening of the jacket 101. At the rear of the casing 101 there is a casing bead 108. On the outer surface of the casing 101 there is a capacity scale 109. The core rod 102 (see fig. 33 to 35) has a knob 110 at the rear end and a packing 111 at the front. After the sealing ring 111 of the core rod 102 is inserted into the sheath cavity 103 from the rear opening 104 of the sheath cavity 103, the button 110 of the core rod 101 is operated to move the sealing ring 111 back and forth within the sheath cavity 103, and the outer wall 112 of the sealing ring 111 forms a sealing fit with the inner wall 113 of the sheath cavity 103 of the medical injector 100.
The injection needle 15 can be inserted into the conical head 106 of the outer sleeve 101 (see fig. 34). The rear end of the conical head 106 of the casing 101 has a conical slope 114 (see fig. 36) with a large inclination. The conical head 106 and conical ramp 114 of the sheath 101 and the tapered lip 17 and tapered bore 18 of the needle 15 form the interface of the needle 15. When the tapered hole 18 of the injection needle 15 is inserted into the tapered head 106 of the sheath 101, the injection needle 15 is fixed to the tapered head 106 of the sheath 101. When the tapered lip 17 of the injection needle 15 is pinched flat, the tapered lip 17 moves along the tapered slope 114 at the rear end of the conical head 106, so that the tapered lip 17 pushes the injection needle 15 forward, so that the tapered hole 18 of the injection needle 15 is disengaged from the conical head 106 of the outer sleeve 101.
One side of the stem 102 has a laterally open instrument cavity 115. An injection needle 15 (see fig. 35) can be placed in the instrument lumen 115. At the rearward end of the instrument lumen 115 is a lumen circumferential groove 116 (see fig. 34). The circumferential width at the lateral opening of the intra-cavity circumferential groove 116 of the instrument cavity 115 is smaller than the diameter of the tapered lip 17 of the injection needle 15 and the diameter of the intra-cavity circumferential groove 116 of the instrument cavity 115. The handle 110 of the core 102 has a notch 117 on the side of the needle 15. When the injection needle 15 is placed into the device cavity 115 of the core pin 102, the tapered lip 17 of the injection needle 15 is elastically deformed over the lateral opening of the intra-cavity circumferential groove 116 of the device cavity 115 into the intra-cavity circumferential groove 116 of the device cavity 115 such that the tapered lip 17 of the injection needle 15 is constrained within the intra-cavity circumferential groove 116 of the device cavity 115, constraining the injection needle 15 within the device cavity 115 (see fig. 35). Before the medical injector 100 is used, the injection needle 15 is placed into the instrument cavity 115 of the stem 102 (see FIG. 33). When the medical injector 100 is used, the tapered lip 17 of the needle 15 inserted into the device cavity 115 of the plunger 102 is pinched at the notch 117 of the knob 110 of the plunger 102, the needle 15 is removed from the lateral opening of the device cavity 115, and the tapered bore 18 of the needle 15 is inserted over the tapered end 106 of the sheath 101, such that the needle 15 is secured to the tapered end 106 of the sheath 101 (see fig. 34). After the medical injector 100 is used, the needle 15 inserted into the tapered end 106 of the sheath 101 is removed, and the needle 15 is inserted into the device cavity 115 of the stem 102 from the side opening of the device cavity 115.
Fig. 38 to 46 show a safety medical injector 120 according to a fourth embodiment of the present invention. The medical injector 120 includes an outer sheath 121 and a core pin 122. The housing 121 includes a liquid-filled bottle 123 and a cover 124 (see fig. 44). The liquid-filled bottle 123 and the outer cover 124 have sufficient transparency. The inflation bottle 123 has a first housing cavity 125 (see fig. 42 and 43). The first casing cavity 125 is open at the front and rear ends, respectively. The front of the first housing cavity 125 has a back cover portion 126. At the front end of the back cover portion 126 of the first housing cavity 125 is a conical head 127. Conical head 127 has a conical head bore 128 therein. The countersunk 128 communicates with the first housing cavity 125. The housing 124 has a second housing cavity 129 (see fig. 40 and 41). The second housing cavity 129 opens at the front and rear ends of the housing 124, respectively. The rear of the second housing cavity 129 has an inwardly projecting catch 130, an inwardly projecting circumferential projection 131 and an outwardly extending housing bead 132. When the second housing cavity 129 of the housing 124 is wrapped around the outer periphery of the liquid filling bottle 123, the latch 130 in the second housing cavity 129 is hooked on the rear end edge of the liquid filling bottle 123 to lock the liquid filling bottle 123 in the second housing cavity 129 of the housing 124, and the conical head 127 of the liquid filling bottle 123 extends out from the front end opening of the housing 124 (see fig. 44). After the sealing ring 133 of the stem 122 is inserted into the first sheath cavity 125 from the opening at the rear end of the second sheath cavity 129, the sealing ring 133 can be moved back and forth within the first sheath cavity 125 by manipulating the knob 134 of the stem 122, and the outer wall 135 of the sealing ring 133 forms a sealing engagement with the inner wall 136 of the first sheath cavity 125 for the medical injector 120.
The injection needle 15 can be inserted into the conical head 127 at the front end of the bottom sealing part of the first jacket cavity of the liquid filling bottle 123. The front opening of the housing 124 may have a large angled conical ramp 137 (see fig. 40). When the tapered hole 20 of the needle 15 is inserted into the tapered head 127 of the liquid charging bottle 123, the needle 15 is fixed to the tapered head 127 of the liquid charging bottle 123. When the tapered lip 17 of the injection needle 15 is pinched flat, the tapered lip 17 moves along the tapered slope 137 at the front opening of the housing 124, and the tapered lip 17 pushes the injection needle 15 to move forward, so that the tapered hole 20 of the injection needle 15 is separated from the tapered head 127 of the liquid charging bottle 123.
One side of the stem 122 has a laterally open instrument cavity 138 (see FIG. 45). The instrument lumen 138 may receive an injection needle 15 (see fig. 46). The rearward end of the instrument lumen 138 has an intra-lumen circumferential groove 139 (see fig. 45). The circumferential width at the lateral opening of the intra-cavity circumferential groove 139 of the instrument cavity 138 is less than the diameter of the tapered lip 17 of the injection needle 15 and the diameter of the intra-cavity circumferential groove 139 of the instrument cavity 138. The knob 134 of the core rod 122 has a notch 140 on the side of the needle 15. When needle 15 is placed in the device cavity 138 of core rod 122, tapered lip 17 of needle 15 is elastically deformed over the lateral opening of the intracavity circumferential groove 139 of device cavity 138 and into the intracavity circumferential groove 139 of device cavity 138 so that tapered lip 17 of needle 15 is constrained within the intracavity circumferential groove 139 of device cavity 138, constraining needle 15 within device cavity 138 (see fig. 46). Before the medical injector 120 is used, the needle 15 is placed into the instrument cavity 138 of the core pin 122 (see FIG. 38). When the medical injector 120 is used, the tapered lip 17 of the needle 15 placed in the device cavity 138 of the core rod 122 is pinched at the notch 140 of the knob 134 of the core rod 122, the needle 15 is removed from the lateral opening of the device cavity 138, and the tapered bore 18 of the needle 15 is inserted over the tapered head 127 of the outer sheath 121, such that the needle 15 is secured to the tapered head 127 of the outer sheath 121 (see fig. 39). After the medical injector 120 is used, the needle 15 inserted over the tapered head 127 of the outer sheath 121 is removed, and the needle 15 is placed into the device cavity 138 of the core pin 122 from a lateral opening of the device cavity 138.
According to the detailed description, the medical injector of the invention can achieve the following technical effects:
the medical injector of the invention realizes that the conical head and the conical inclined plane of the outer sleeve and the conical lip edge and the conical hole of the injection device of the injection needle or the spray head form the interface of the injection device. When the conical hole of the injection needle is inserted into the conical head of the outer sleeve, the injection needle is fixed on the conical head of the outer sleeve, so that the aim of preventing the needle point of the injection needle from swinging when the injection needle is inserted into muscles or blood vessels of a human body is fulfilled, and misoperation is avoided; after the medical injector is used, the conical lip of the injection needle far away from the injection needle head is pinched to flatten the conical lip, the injection needle can be separated from the conical head of the outer sleeve of the medical injector, the injection needle with bacteria can be placed into the collecting box, the injection needle with bacteria can be collected into the appliance cavity of the core rod of the medical injector, the purpose of avoiding the contact with the needle head in the operation process is achieved, and therefore the injection needle with bacteria is prevented from hurting a human body.
The medical injector of the invention realizes that one side of the core rod is provided with an appliance cavity which is provided with a lateral opening and can be used for placing an injection appliance, and the press hand of the core rod is provided with a gap at one side of the appliance cavity. Before the medical injector is used, the injection device is placed into the device cavity of the core rod; when the medical injector is used, the conical lip of the injection device placed in the device cavity of the core rod is pinched at the notch of the press hand of the core rod, and the injection device is taken out from the lateral opening of the device cavity; after the medical injector is used, the injection device inserted on the conical head of the outer sleeve is taken down, the injection device is placed into the device cavity of the core rod from the lateral opening of the device cavity, then the core rod is pushed to the bottom, most of the core rod enters the outer sleeve, and the purpose that the finally formed safe medical injector is small in overall volume is achieved, so that convenience is brought to subsequent destroying treatment.
The medical injector realizes that the rear part of the cavity of the outer sleeve is provided with an inward convex locking circumferential lug, the periphery of the core rod is provided with a locking circumferential groove, the locking circumferential lug in the cavity of the outer sleeve can elastically deform to cross the locking circumferential lug of the core rod and enter the locking circumferential groove of the core rod, the locking circumferential lug in the cavity of the outer sleeve gives out a sound prompt when elastically deforming, and the core rod and an injection needle arranged in the cavity of the core rod are locked in the outer sleeve. After the medical injector is used, once the expected disposable use process is finished, the function of preventing reuse is automatically started, the outer sleeve of the medical injector and the core rod are locked together, then the conical lip of the injection needle far away from the needle head is pinched flat, the injection needle can be separated from the conical head of the outer sleeve of the medical injector, and then the injection needle with bacteria is placed into the collection box; for the use requirement that the core bar can be used for multiple times of suction before single injection, once the expected disposable use process is finished, the conical lip edge of the injection needle far away from the needle head is pinched flat, the injection needle can be separated from the conical head of the outer sleeve of the medical injector, the injection needle with bacteria can be placed into the collection box, the injection needle with bacteria can also be collected into the instrument cavity of the core bar of the medical injector, then the function of preventing reuse is selectively and manually started, and the outer sleeve and the core bar of the medical injector are locked together or not; the purpose that the needle head can not be contacted in the operation process is achieved, so that serious injury to a human body caused by injection with bacteria can be avoided, and repeated use can be avoided.
The medical injector realizes that the rear part of the outer sleeve cavity is provided with an inward convex positioning circumferential lug, and the periphery of the core rod is provided with a positioning axial lug and a plurality of positioning circumferential grooves which are axially distributed along the core rod. When the core rod is rotated to enable the positioning circumferential lug in the outer sleeve cavity to elastically deform to cross the positioning axial lug of the core rod and enter the selected positioning circumferential groove of the core rod, a cavity between the front end of the sealing ring of the core rod constrained in the outer sleeve cavity and the bottom sealing part of the outer sleeve cavity forms the selected liquid filling capacity of the medical injector; when the core rod is rotated to enable the positioning circumferential lug in the cavity of the outer sleeve to elastically deform and move out of the positioning circumferential groove of the core rod beyond the positioning circumferential groove of the core rod, the button of the core rod is operated to enable the sealing ring to move back and forth in the cavity of the outer sleeve; the aim that the pre-filling liquid medicine amount of the medical injector can be accurately locked is achieved. In the operation process, when the positioning circumferential lug in the cavity of the outer sleeve is elastically deformed, the sound is emitted to prompt that the working state of the medical injector is changed.
The medical injector of the invention realizes that the parts of the safe disposable sterile injector or the safe self-destruction disposable sterile injector are one less part of the sheath of the injection needle than the parts of the conventional disposable sterile injector, the structure of the liquid filling chamber of the medical injector of the invention is the same as that of the conventional disposable sterile injector, the medical injector of the invention not only achieves the purposes of conveniently removing the gas in the liquid filling chamber and conveniently assembling, but also achieves the purposes that the production cost is almost the same as that of the conventional disposable sterile injector and is much lower than that of the existing safe disposable sterile injector or the safe self-destruction disposable sterile injector.
It will thus be seen that the objects set forth above, including those made apparent from the preceding description, are efficiently attained. While only the exemplary preferred embodiment of the present invention has been described herein, certain changes may be made in the above constructions without departing from the spirit and scope of the invention. The invention is not limited or restricted to the specific details set forth herein but is intended to retain any improvements or modifications that would be obvious to one of ordinary skill in the art as set forth in the limitations of the claims.

Claims (10)

1. An interface of an injection apparatus of a medical injector, the medical injector comprising an outer sleeve and a core rod;
the outer sleeve is provided with an outer sleeve cavity, the outer sleeve cavity is respectively provided with openings at the front end and the rear end of the outer sleeve, the front end of the outer sleeve cavity is provided with a sealing bottom, the front end of the sealing bottom of the outer sleeve cavity is provided with a conical head, a conical head hole is arranged in the conical head, the conical head hole is communicated with the outer sleeve cavity, the rear part of the outer sleeve is provided with an outer sleeve curled edge, and the outer surface of the outer sleeve is provided with a capacity scale;
the rear end of the core rod is provided with a press handle, and the front part of the core rod is provided with a sealing ring; after a sealing ring of the core rod is inserted into the outer sleeve cavity from the opening at the rear end of the outer sleeve cavity, the pressing hand of the core rod is operated to enable the sealing ring to move back and forth in the outer sleeve cavity, and the outer wall of the sealing ring is in sealing fit with the inner wall of the outer sleeve cavity;
the method is characterized in that: the injection device is inserted on the conical head of the outer sleeve, the conical inclined surface is arranged at the rear end of the conical head of the outer sleeve, the conical lip edge and the conical hole are arranged at the rear part of the injection device, the conical lip edge of the injection device is positioned at the rear part of the conical hole, and the conical head and the conical inclined surface of the outer sleeve and the conical lip edge and the conical hole of the injection device form an interface of the injection device; when the conical hole of the injection device is inserted on the conical head of the outer sleeve, the injection device is fixed on the conical head of the outer sleeve; when the conical lip of the injection device is pinched flat, the conical lip moves along the conical inclined surface at the rear end of the conical head of the outer sleeve, so that the conical lip pushes the injection device to move forwards, and the conical hole of the injection device is separated from the conical head of the outer sleeve.
2. A medical injector interface as claimed in claim 1, wherein the walls of the tapered lip of the injector are provided with axial grooves.
3. The medical injector syringe interface of claim 1, wherein the core pin has a laterally open device cavity on one side thereof into which the injector is inserted, and an intra-cavity circumferential groove at a rear end thereof, the lateral opening of the intra-cavity circumferential groove of the device cavity having a circumferential width smaller than a diameter of the tapered lip of the injector and a diameter of the intra-cavity circumferential groove of the device cavity; when the injection device is placed into the device cavity of the core rod, the tapered lip of the injection device elastically deforms over the lateral opening of the intra-cavity circumferential groove of the device cavity and into the intra-cavity circumferential groove of the device cavity, so that the tapered lip of the injection device is constrained within the intra-cavity circumferential groove of the device cavity, and the injection device is constrained within the device cavity.
4. A medical injector syringe interface as claimed in claim 3, wherein the plunger is notched on the side of the device cavity; the injection device is placed into the device cavity of the core rod before the medical injector is used; when the medical injector is used, the conical lip of the injection device placed in the device cavity of the core rod is pinched at the notch of the press handle of the core rod, the injection device is taken out from the lateral opening of the device cavity, and the conical hole of the injection device is inserted on the conical head of the outer sleeve, so that the injection device is fixed on the conical head of the outer sleeve.
5. The medical injector syringe interface of claim 4, wherein after the medical injector is used, the syringe inserted into the tapered end of the sheath is removed and then placed into the device cavity of the core pin from the lateral opening of the device cavity.
6. A medical injector syringe interface as claimed in claim 1, wherein the rear portion of the outer housing cavity has an inwardly projecting positioning circumferential projection, the positioning circumferential projection having projection axial restraining ramps on opposite axial sides thereof, and the positioning circumferential projection having projection circumferential restraining ramps on opposite circumferential sides thereof; the periphery of the core bar is provided with a positioning circumferential groove, a plurality of positioning circumferential grooves are distributed along the axial direction of the core bar in an arrayed manner, the two axial sides of each positioning circumferential groove are respectively provided with a groove axial restraint inclined plane, the two circumferential sides of each positioning circumferential groove are respectively provided with a groove circumferential restraint inclined plane, the circumferential side surface of each positioning circumferential groove is provided with a positioning axial bump, and the circumferential side surface of each positioning axial bump is provided with a bump circumferential restraint inclined plane; when the core rod is rotated to enable the positioning circumferential lug in the cavity of the outer sleeve to elastically deform and cross the lug circumferential restraining inclined plane of the positioning axial lug of the core rod to enter the selected positioning circumferential groove of the core rod, the two groove circumferential restraining inclined planes of the selected positioning circumferential groove of the core rod are respectively mutually restrained with the two lug circumferential restraining inclined planes of the positioning circumferential lug in the outer sleeve cavity to prevent the core rod from rotating in the outer sleeve cavity, the two groove axial restraining inclined planes of the selected positioning circumferential groove of the core rod are respectively mutually restrained with the two lug axial restraining inclined planes of the positioning circumferential lug in the outer sleeve cavity to prevent the sealing ring of the core rod from moving back and forth in the outer sleeve cavity, and a cavity between the front end of the sealing ring of the core rod restrained in the outer sleeve cavity and the sealing bottom of the outer sleeve cavity forms the selected liquid filling capacity of the medical injector; when the core rod is rotated to enable the positioning circumferential lug in the outer sleeve cavity to elastically deform and cross the groove circumferential restraining inclined plane of the positioning circumferential groove of the core rod to move out of the positioning circumferential groove of the core rod, the lug circumferential restraining inclined plane of the positioning axial lug of the core rod prevents the positioning circumferential lug in the outer sleeve cavity from entering the positioning circumferential groove of the core rod, and the button of the core rod is operated to enable the sealing ring to move back and forth in the outer sleeve cavity.
7. A medical injector syringe interface as claimed in claim 1, wherein the rear portion of the outer housing cavity has an inwardly projecting locking circumferential projection, the locking circumferential projection having axial projection restraining ramps on its axial direction, and each of the locking circumferential projection having circumferential projection restraining ramps on its circumferential sides; a locking circumferential groove is formed in the periphery of the core rod, an axial groove axial restraint inclined plane is formed in the axial direction of the locking circumferential groove, circumferential restraint inclined planes are respectively formed in the two circumferential sides of the locking circumferential groove, and a locking axial convex block is arranged on the circumferential side surface of the locking circumferential groove; when the core rod is rotated to enable the locking circumferential lug in the outer sleeve cavity to elastically deform and cross the locking axial lug of the core rod to enter the locking circumferential groove of the core rod, the groove axial constraint inclined plane of the locking circumferential groove of the core rod and the lug axial constraint inclined plane of the locking circumferential lug in the outer sleeve cavity are mutually constrained, and the two groove circumferential constraint inclined planes of the locking circumferential groove of the core rod are respectively mutually constrained with the two lug circumferential constraint inclined planes of the locking circumferential lug in the outer sleeve cavity, so that the core rod is locked on the outer sleeve cavity.
8. A medical injector syringe interface as claimed in claim 1, wherein the rear portion of the outer housing cavity has an inwardly projecting locking circumferential projection, the locking circumferential projection having axial projection restraining ramps on its axial direction, and each of the locking circumferential projection having circumferential projection restraining ramps on its circumferential sides; a locking circumferential groove is formed in the periphery of the core rod, an axial groove axial restraint inclined plane is formed in the locking circumferential groove, circumferential restraint inclined planes are respectively formed in two circumferential sides of the locking circumferential groove, and a locking circumferential lug is arranged on the axial side face of the locking circumferential groove; when the core rod is pushed to enable the locking circumferential convex blocks in the outer sleeve cavity to elastically deform to cross the locking circumferential convex blocks of the core rod and enter the locking circumferential grooves of the core rod, the groove axial constraint inclined planes of the locking circumferential grooves of the core rod and the convex block axial constraint inclined planes of the locking circumferential convex blocks in the outer sleeve cavity are mutually constrained, and the two groove circumferential constraint inclined planes of the locking circumferential grooves of the core rod are respectively mutually constrained with the two convex block circumferential constraint inclined planes of the locking circumferential convex blocks in the outer sleeve cavity, so that the core rod is locked on the outer sleeve cavity.
9. The hub of an injection unit of a medical injector as set forth in claim 1, wherein said casing includes a liquid-filled bottle and a housing; the liquid charging bottle is provided with a first outer sleeve cavity, the front end and the rear end of the first outer sleeve cavity are respectively provided with an opening, the front part of the first outer sleeve cavity is provided with a bottom sealing part, the front end of the bottom sealing part of the first outer sleeve cavity is provided with a conical head, a conical head hole is formed in the conical head, and the conical head hole is communicated with the first outer sleeve cavity; the outer cover is provided with a second outer cover cavity, the front end and the rear end of the outer cover are respectively provided with an opening, and the rear part of the second outer cover cavity is provided with an inward convex buckle, an inward convex circumferential lug and an outward extending outer cover curled edge; when the second outer sleeve cavity of the outer cover is wrapped on the periphery of the liquid filling bottle, the buckle of the second outer sleeve cavity of the outer cover is hooked on the edge of the rear end of the liquid filling bottle, the liquid filling bottle is locked in the second outer sleeve cavity of the outer cover, and the conical head of the liquid filling bottle extends out of the opening at the front end of the outer cover; when the sealing ring of the core rod is inserted into the first outer sleeve cavity from the opening at the rear end of the second outer sleeve cavity, the press handle of the core rod is operated to enable the sealing ring to move back and forth in the first outer sleeve cavity, and the outer wall of the sealing ring and the inner wall of the first outer sleeve cavity form sealing fit of the medical injector.
10. The medical injector syringe interface according to claim 9, wherein the syringe is inserted into the conical head of the front end of the bottom sealing portion of the first housing cavity of the liquid-filled bottle, and the front end opening of the housing has a conical inclined surface with a large inclination angle; when the conical hole of the injection appliance is inserted on the conical head of the liquid charging bottle, the injection appliance is fixed on the conical head of the liquid charging bottle; when the conical lip edge of the injection device is pinched flat, the conical lip edge moves along the conical inclined plane at the opening at the front end of the outer cover, and the conical lip edge pushes the injection device to move forwards, so that the conical hole of the injection device is separated from the conical head of the liquid charging bottle.
CN201710345517.8A 2017-05-16 2017-05-16 Interface of injection device of medical injector Active CN106964027B (en)

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Application Number Priority Date Filing Date Title
CN201710345517.8A CN106964027B (en) 2017-05-16 2017-05-16 Interface of injection device of medical injector
PCT/CN2017/109253 WO2018209899A1 (en) 2017-05-16 2017-11-03 Interface for injection needle of medical syringe injector
US16/082,169 US11154664B2 (en) 2017-05-16 2017-11-03 Interface of needle of medical syringe

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CN201710345517.8A CN106964027B (en) 2017-05-16 2017-05-16 Interface of injection device of medical injector

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018209899A1 (en) * 2017-05-16 2018-11-22 上海博洽医疗器械有限公司 Interface for injection needle of medical syringe injector
CN108926755A (en) * 2018-08-02 2018-12-04 上海博洽医疗器械有限公司 The injector for medical purpose that anti-needle is stabbed

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CN208212260U (en) * 2017-05-16 2018-12-11 上海博洽医疗器械有限公司 The interface of the instrument used for injection of injector for medical purpose

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TWI265036B (en) * 2005-04-29 2006-11-01 Guo-Ming Huang Safety injector and method of operating the same
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US4932941A (en) * 1988-03-14 1990-06-12 Min Kyung M Non-reusable disposable syringe
CN2673419Y (en) * 2004-01-05 2005-01-26 董永华 Self locking type injector
CN201030119Y (en) * 2007-02-14 2008-03-05 董忠浩 Safety syringe with the needle backing automatically
CN201453770U (en) * 2009-07-09 2010-05-12 张亚平 Safety syringe with separate syringe body and needle
CN202113444U (en) * 2011-06-24 2012-01-18 上海双鸽实业有限公司 Special insulin syringe
CN105597195A (en) * 2016-02-02 2016-05-25 黄沛敏 Disposable syringe
CN208212260U (en) * 2017-05-16 2018-12-11 上海博洽医疗器械有限公司 The interface of the instrument used for injection of injector for medical purpose

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