WO2004091699A1 - A safety injector structure - Google Patents

A safety injector structure Download PDF

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Publication number
WO2004091699A1
WO2004091699A1 PCT/KR2004/000888 KR2004000888W WO2004091699A1 WO 2004091699 A1 WO2004091699 A1 WO 2004091699A1 KR 2004000888 W KR2004000888 W KR 2004000888W WO 2004091699 A1 WO2004091699 A1 WO 2004091699A1
Authority
WO
WIPO (PCT)
Prior art keywords
pushing member
needle hub
discharge port
needle
outer cylinder
Prior art date
Application number
PCT/KR2004/000888
Other languages
French (fr)
Inventor
Sung Gu Jo
Original Assignee
Sung Gu Jo
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 Sung Gu Jo filed Critical Sung Gu Jo
Publication of WO2004091699A1 publication Critical patent/WO2004091699A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/02—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor using physical phenomena
    • A61L2/08—Radiation
    • A61L2/10—Ultraviolet radiation
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43B—CHARACTERISTIC FEATURES OF FOOTWEAR; PARTS OF FOOTWEAR
    • A43B3/00—Footwear characterised by the shape or the use
    • A43B3/10—Low shoes, e.g. comprising only a front strap; Slippers
    • A43B3/101—Slippers, e.g. flip-flops or thong sandals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2/00—Methods or apparatus for disinfecting or sterilising materials or objects other than foodstuffs or contact lenses; Accessories therefor
    • A61L2/24—Apparatus using programmed or automatic operation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/11—Apparatus for generating biocidal substances, e.g. vaporisers, UV lamps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/12—Apparatus for isolating biocidal substances from the environment
    • A61L2202/122—Chambers for sterilisation
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/10—Apparatus features
    • A61L2202/14—Means for controlling sterilisation processes, data processing, presentation and storage means, e.g. sensors, controllers, programs
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
    • A61L2202/00—Aspects relating to methods or apparatus for disinfecting or sterilising materials or objects
    • A61L2202/20—Targets to be treated
    • 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
    • A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3223—Means impeding or disabling repositioning of used needles at the syringe nozzle
    • A61M2005/3224—Means to disalign the needle tip and syringe nozzle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3221—Constructional features thereof, e.g. to improve manipulation or functioning
    • A61M2005/3231—Proximal end of needle captured or embedded inside piston head, e.g. by friction or hooks
    • 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
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/322—Retractable needles, i.e. disconnected from and withdrawn into the syringe barrel by the piston
    • A61M5/3232—Semi-automatic needle retraction, i.e. in which triggering of the needle retraction requires a deliberate action by the user, e.g. manual release of spring-biased retraction means

Definitions

  • the present invention relates to a safety injector structure capable of
  • a safety injector that is an injector in which an outer
  • cylinder and a needle hub are integral, and a piston and a needle hub are integral, and a piston and a needle hub are
  • connection rib by a connection rib is separated from an outer cylinder, and a needle hub
  • injector needle is inserted into an injection, and a piston is bac wardly pulled, the
  • Figure 1 is a cross sectional view of a major part of a injector in the conventional
  • a needle hub 2 in which an injector
  • needle 1 is integrally fixed, an outer cylinder 5 in which a piston 3 is movable
  • reference numeral 7 is a stopper that is formed at a portion behind an inner
  • needle cap 6 is separated from the needle hub 2 for using injector, the tip of the
  • injector needle 1 that is longitudinally extended may contact with the needle cap
  • the needle cap 6 is engaged to the needle hub 2 for preventing an injector
  • tip of the injector needle 1 is contacted with a user's body, and the user has a
  • a certain infectious disease such as AIDS or hepatitis may be
  • Figure 2 is a cross sectional view of an enlarged major part of another
  • the injector needle 1 is integrally fixed.
  • a needle is integrally fixed.
  • hub 2 includes a screw shaped protrusion 2a at an outer surface of the same.
  • a pushing member 3 is detachably
  • connection member connected with the needle hub 2 by a connection member, wherein it is forwardly
  • a needle cap 6 is detachably
  • a groove 2b is formed in an inner surface of the needle hub 2 as a
  • connection member There is provided a protrusion pin 3 a that is formed at a
  • the hand intended to hold the outer cylinder may be touched with a sharp ip of the injector needle 1 due to mistake or may be touched with a user's body
  • Figure 1 is an enlarged cross sectional view of a injector in the
  • Figure 2 is an enlarged cross sectional view of another injector in the
  • Figure 3 is a separated perspective view of a safety injector according to
  • Figures 4 and 5 are cross sectional views of a safety injector according to
  • Figure 6 is a cross sectional view illustrating a state that a needle hub is
  • Figure 7 is a cross sectional view illustrating an operation that a needle
  • Figure 8 is a cross sectional view illustrating an operation that a needle
  • Figure 9 is a view of describing an injection operation using a safety
  • Figure 10 is a cross sectional view illustrating an operation that an
  • injector needle is moved into the interior of an outer cylinder after an injection
  • Figure 11 is a cross sectional view illustrating an operation that an
  • injector needle is bent in the interior of an outer cylinder after an injection using
  • Figure 12 is a view illustrating a safety injector according to another embodiment of the present invention.
  • Figure 13 is a separated perspective view of a safety injector according
  • Figure 14 is a cross sectional view of a safety injector according to
  • Figure 15 is a view illustrating the construction of a needle cap covered
  • injector capable of preventing a bending of a tip of an injector needle when
  • connection member and a needle hub and a pushing member are separated by
  • safety injector capable of preventing a needle hub from being separated from an
  • an expansion part is provided in a lower side of the needle cap in a
  • a first push prevention shoulder is provided in an outer
  • the needle hub is pressurized in order to achieve a horizontal state in
  • a second push prevention shoulder is provided in
  • connection member capable of detachably engaging
  • a protrusion is formed in an inner surface of the discharge
  • a groove corresponding to the protrusion is formed in a needle hub.
  • an outer cylinder 105 having an inwardly
  • needle hub 102 is fixed to the discharge port 104 based on a forward movement
  • the injector needle 101 is inserted into the interior of the outer
  • connection member there are provided a pair of engaging
  • a first push prevention shoulder 130 is provided on an outer surface of
  • the needle 102 formed at the portion corresponding to the slanted front end of the
  • discharge port 104 in a circular shape or in a shape of a few protrusions for
  • second push prevention shoulder 113 is provided in an inner surface of the
  • reference numeral 107 represents a stopper formed in an
  • the needle cap 106 is connected with the front end
  • the second connection member 120 is inserted into the interior of the outer
  • the pushing member 103 is
  • the injector needle 101 is inserted into an injection
  • the second connection member 120 is
  • the pushing member 103 is slightly forwardly
  • the pushing member 103 is slightly
  • the needle hub 102 and the pushing member 103 are integrally formed
  • needle hub 102 is surrounded based on a close engagement of the slanted surface
  • protrusion 102b is provided below the protrusion 102a of the needle hub 102 for
  • the injector needle 101 or the needle hub 102 is pressurized, namely, the injector needle 101 or the needle hub 102 is
  • the pressure generated at the tapered discharge port 104 can be endured based on a double structure between the first push prevention
  • the needle cap 106 is separated from the outer cylinder 105 for thereby
  • the needle hub 102 and the pushing
  • the protrusion 113 is formed in an inner
  • protrusion 113 is formed in the needle hub 102.
  • part 102b is provided at the lower side of the needle hub 102.
  • shoulders 103b are formed at the end of the pushing member 103 wherein the
  • engaging shoulders 103b are opposite to each other with a certain interval to be
  • an extension part Il ia is provided at the
  • the first push prevention shoulder 130 is
  • needle hub 102 is engaged to the discharge port 104 when the pushing member
  • a second push prevention shoulder 113 is forwardly moved.
  • a second push prevention shoulder 113 is forwardly moved.
  • duplicating elements are given the same numbers.
  • the needle cap 106 is integrally connected
  • first connection member 111 and is separated with respect to the outer cylinder
  • a circular guide part 150 is integrally formed at a front end of the pushing member 103 movable in the outer cylinder 105.
  • the needle hub 102 is
  • injector needle 101 is fixed to the front end and is detachable with
  • a connection member is provided to fix the
  • connection member includes a
  • first push prevention shoulder 130 is provided in an outer surface of the needle
  • port 104 in a circular shape or a shape of a few protrusions for preventing a gap
  • tapered discharge port 104 generated when the injector needle 101 or the needle hub 102 is pressurized for horizontally maintaining the needle hub 102 in
  • a second push prevention shoulder 113 is provided in an
  • connection member includes a pair of engaging shoulders formed opposite to
  • the compression spring or plate spring 160 is
  • the needle cap 106 is covered on
  • the safety injector according to the present invention has the following
  • the needle hub and the pushing member are integrally formed
  • outer cylinder and the needle cap are integrally formed, so that the number of the
  • the needle hub and the pushing member are integrally formed, and the
  • the needle cap connected by the connection member is separated from the outer cylinder, and at the same time the
  • needle hub is engaged to the discharge port of the outer cylinder.

Landscapes

  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Veterinary Medicine (AREA)
  • Public Health (AREA)
  • General Health & Medical Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • Epidemiology (AREA)
  • Engineering & Computer Science (AREA)
  • Vascular Medicine (AREA)
  • Hematology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Biomedical Technology (AREA)
  • Anesthesiology (AREA)
  • Environmental & Geological Engineering (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

The present invention relates to a safety injector. It is possible to prevent an end portion of an injector needle from being bent when separating a needle cap covered to protect injector needle. A procedure for covering the needle cap for discarding the injectors used is not needed in the present invention. In addition, it is possible to prevent an infection to wound when an injector needle contacts with a human body.

Description

A SAFETY INJECTOR STRUCTURE
[Technical Field]
The present invention relates to a safety injector structure capable of
preventing a bending of a tip of an injector needle when separating a needle cap
adapted to protect an injector needle and preventing an infectious disease such as
AIDS or hepatitis due to a physical contact with an injector needle in such as
manner that a needle cap covering process for discarding an injector used is not
needed, and in particular to a safety injector, that is an injector in which an outer
cylinder and a needle hub are integral, and a piston and a needle hub are
integrally formed. When a piston is pushed, a needle cap connected with an outer
cylinder by a connection rib is separated from an outer cylinder, and a needle hub
is connected with a discharge port of the outer cylinder. In addition, when an
injector needle is inserted into an injection, and a piston is bac wardly pulled, the
piston is separated from the needle hub, and a medicine is sucked. When
injecting into a human body, an impact applied to a human body is minimized
based on a coupling of the needle hub and piston. When the injector needle is
separated from a human body, and the piston is backwardly moved, the injector
needle is inserted into the interior of the outer cylinder, and then the piston is
forwardly moved. Thereafter, the injector needle is wasted in the interior of the
cylinder. [Background Art]
Figure 1 is a cross sectional view of a major part of a injector in the conventional
art. As shown therein, there are provided a needle hub 2 in which an injector
needle 1 is integrally fixed, an outer cylinder 5 in which a piston 3 is movable
forwardly and backwardly, and the needle hub 2 is sealingly engaged to an outer
side of a tapered discharge port 4, and a needle cap 6 detachable from the needle
hub 2 for thereby protecting a tip of the injector needle 1. In the drawings,
reference numeral 7 is a stopper that is formed at a portion behind an inner
surface of the outer cylinder 5 for thereby preventing the piston 3 from being
separated from the outer cylinder 5 when backwardly moving the piston 3.
In the structure of the injector of Figure 1, during the procedure that the
needle cap 6 is separated from the needle hub 2 for using injector, the tip of the
injector needle 1 that is longitudinally extended may contact with the needle cap
6. In this case, the end of the injector needle 1 may be easily bent. At this time, in
the case that the end of the injector needle 1 is bent by a small degree, a patient
may feel big pain when it is injected. In addition, when collecting the injectors
used, the needle cap 6 is engaged to the needle hub 2 for preventing an injector
collector from being injured by a sharp injector needle 1. In this case, when the
tip of the injector needle 1 is contacted with a user's body, and the user has a
certain wound, a certain infectious disease such as AIDS or hepatitis may be
infected to the user. Namely, the safety is decreased. Figure 2 is a cross sectional view of an enlarged major part of another
injector in the conventional art. The injector needle 1 is integrally fixed. A needle
hub 2 includes a screw shaped protrusion 2a at an outer surface of the same.
There is provided an outer cylinder 5 in which a needle hub 2 is detachably fixed
wherein a screw type groove 5a corresponding to the protrusion 2a is formed in
an inner surface of a discharge port 4. A pushing member 3 is detachably
connected with the needle hub 2 by a connection member, wherein it is forwardly
and backwardly movable in the outer cylinder 5. A needle cap 6 is detachably
fixed to the discharge port 4 for thereby protecting the injector needle 1. At this
time, a groove 2b is formed in an inner surface of the needle hub 2 as a
connection member. There is provided a protrusion pin 3 a that is formed at a
front end of the pushing member 3 and is capable of detachably connecting the
pushing member 3 with respect to the needle hub 2, wherein the injector needle 1
is moved into the outer cylinder 5 when the pushing member 3 is backwardly
moved. In Figure 8, there is provided an O-ring engaged to an outer surface of
the needle hub 2 for fixing the needle hub 2 to the discharge port 4 in a sealed
state.
As shown in Figure 2, in the injector structure, in order to move the
injector needle 1 into the interior of the outer cylinder 5, the outer cylinder 5 is
held using another hand, and the pushing member 3 is rotated by 90° using the
other hand, so that the needle hub and the pushing member are engaged. In this
case, the hand intended to hold the outer cylinder may be touched with a sharp ip of the injector needle 1 due to mistake or may be touched with a user's body
for thereby causing a certain wound.
In the above case, it is impossible to protect the user from a deadly
infectious disease such as AIDS. When the needle cap 6 is separated from the
discharge port 4 for using an injector, in the case that the end part of the injector
needle 1 and the needle cap 6 contact with each other due to the user's mistake,
the end part of the injector needle 1 is easily bent. In addition, there is provided
an O-ring for sealing with respect to the needle hub 2, so that the number of parts
is increased. Since the needle hub 2 and the pushing member 3 are separately
fabricated, the number of works is increased, and the unit cost and fabrication
cost are increased.
[Brief Description of the Drawings]
The preferred embodiments of the present invention will be described
with reference to the accompanying drawings.
Figure 1 is an enlarged cross sectional view of a injector in the
conventional art;
Figure 2 is an enlarged cross sectional view of another injector in the
conventional art.
Figure 3 is a separated perspective view of a safety injector according to
an embodiment of the present invention; Figures 4 and 5 are cross sectional views of a safety injector according to
an embodiment of the present invention;
Figure 6 is a cross sectional view illustrating a state that a needle hub is
engaged with respect to a tapered discharge port in a safety injector according to
an embodiment of the present invention;
Figure 7 is a cross sectional view illustrating an operation that a needle
hub and a pushing member are separated from each other when a pushing
member is moved back when a medicine liquid is sucked from an injector
medicine bottle using a safety injector according to an embodiment of the present
invention;
Figure 8 is a cross sectional view illustrating an operation that a needle
hub and a pushing member are engaged when a pushing member is moved
forwardly during an injection using a safety injector according to an embodiment
of the present invention;
Figure 9 is a view of describing an injection operation using a safety
injector according to an embodiment of the present invention;
Figure 10 is a cross sectional view illustrating an operation that an
injector needle is moved into the interior of an outer cylinder after an injection
using a safety injector according to an embodiment of the present invention;
Figure 11 is a cross sectional view illustrating an operation that an
injector needle is bent in the interior of an outer cylinder after an injection using
a safety injector according to an embodiment of the present invention; Figure 12 is a view illustrating a safety injector according to another
embodiment of the present invention;
Figure 13 is a separated perspective view of a safety injector according
to further another embodiment of the present invention;
Figure 14 is a cross sectional view of a safety injector according to
further another embodiment of the present invention; and
Figure 15 is a view illustrating the construction of a needle cap covered
onto an outer surface of a discharging port of an outer cylinder according to
further another embodiment of the present invention.
[Disclosure of Invention]
Accordingly, it is an object of the present invention to provide a safety
injector capable of preventing a bending of a tip of an injector needle when
separating a needle cap provided for protecting an injector needle, wherein a
covering work of a needle cap for discarding the used injector is not needed, and
it is possible to protect a user or a used injector collector (a person who collects
the injector used and disposes the same) from being infected with a certain
disease such as hepatitis due to wound caused when a human body contacts with
an injector needle because both hands are not concurrently used even when a
needle is inputted into the interior of the outer cylinder.
It is another object of the present invention to provide a safety injector
capable of decreasing the number of works of a fabrication and assembling processes and decreasing a unit cost and fabrication cost wherein a needle cap
connected with an outer cylinder and a connection member is integral, and a
pushing member connected by a needle hub and a connection member is integral,
and a sealing O-ring is not needed for fixing a needle hub to an outer cylinder.
It is further another object of the present invention to provide a safety
injector in which an outer cylinder and a needle cap are separated by cutting a
connection member, and a needle hub and a pushing member are separated by
cutting a connection member for thereby basically preventing a reuse of an
injector, so that it is possible to a certain infection of disease.
It is still further another object of the present invention to provide a
safety injector capable of preventing a needle hub from being separated from an
outer cylinder due to a repulsive force by a muscle movement during an injection
or preventing a leakage of injection liquid for thereby enhancing an accurate
injection and reliability.
To achieve the above objects, there is provided a safety injector that
includes an outer cylinder having a tapered discharge port; a needle cap integrally
connected with the outer cylinder by a first connection member and is separated
from the outer cylinder based on a cutting of the first connection member as the
pushing member inserted into the outer cylinder is forwardly moved; a gasket
that expands an entrance of the discharge port as the pushing member is
forwardly moved, and easily separates the needle hub from a groove of the
discharge port, and prevents the engaging shoulder of the needle hub from being separated from a hook part of the pushing member and contacts an end of the
injector needle with an inner wall surface when it is inserted into the interior of
the outer cylinder; a widening prevention protrusion capable of preventing the
engaging shoulder of the needle hub from being widened; and a connection
member that separates the pushing member from the needle hub based on a
cutting of the second connection member connecting the needle hub and the
pushing member as the pushing member is forwardly moved when fixing the
needle hub to the discharge port, and connects the pushing member to the needle
hub as the pushing member is forwardly moved during an injection and inserts
the injector needle into the outer cylinder when the pushing member is moved
back after injection.
[Best mode for Carrying Out the Invention]
The preferred embodiments of the present invention will be described
with reference to the accompanying drawings. In the following descriptions,
when the detailed descriptions concerning the function or construction are
deemed to make the gist of the present invention unclear, the detailed
descriptions of the same will be omitted.
In a preferred embodiment of the present invention, the connection
member includes a pair of engaging shoulders opposite to the lower side of the
needle hub, and a hook part that is inserted into the engaging shoulder during injection and escapes the needle hub from the discharge port when the pushing
member is moved back and inserts into the interior of the outer cylinder. In
addition, an expansion part is provided in a lower side of the needle cap in a
radial shape and is easily caught by a front end of the discharge port when the
pushing member is moved back in a state that the needle cap is escaped from the
discharge port after the needle cap is engaged to the needle hub for thereby easily
separating the needle cap from the needle hub.
In addition, a first push prevention shoulder is provided in an outer
surface of the needle hub at a portion corresponding to a slanted end of the
discharge port in a circular shape or a shape of a few protrusions for thereby
preventing a gap formation between the discharge port and the needle hub by a
lateral pressure of the tapered discharge port occurring when the injector needle
or the needle hub is pressurized in order to achieve a horizontal state in
maximum with respect to a blood vessel during injection after the needle hub is
engaged to the discharge port. A second push prevention shoulder is provided in
an inner surface of the discharge port to correspond with the protrusion formed in
an outer surface of the needle hub for thereby preventing a separation of the
needle hub from the discharge port by a forward pressure of the tapered discharge
port occurring a repulsive force of muscle during injection after the needle hub is
engaged to the discharge port.
In addition, in the connection member capable of detachably engaging
the needle hub and the pushing member, the needle hub and the pushing member are separately formed. A protrusion is formed in an inner surface of the discharge
port. A groove corresponding to the protrusion is formed in a needle hub. An
engaging shoulder is formed in a lower side of the needle hub. A hook part
opposite to the engaging shoulder is formed at an end of the pushing member for
thereby being detached from the engaging shoulder when the pushing member is
forwardly and backwardly moved.
As shown in Figures 3 through 15, in the safety injector according to the
present invention, there are provided an outer cylinder 105 having an inwardly
tapered discharge port 104, a needle cap 106 separated with respect to the outer
cylinder 104 based on a cuttmg of a first connection member 111 wherein a
needle hub 102 is fixed to the discharge port 104 based on a forward movement
of a pushing member 103, a needle hub 102 that is integrally connected with the
pushing member 103 forwardly and backwardly movable in the outer cylinder
105, and is integrally connected with the pushing member 103, and is received in
the outer cylinder 105, and is detachably engaged to the tapered discharge port
104 wherein the injector needle 101 is fixed to a front end of the same, and a
connection member in which the pushing member 103 is separated from the
needle hub 102 based on a cutting of a second connection member 103 integrally
connecting the needle hub 102 and the pushing member 103 when the pushing
member 103 is forwardly moved in a state that the needle hub 102 is fixed to the
discharge port 104, and the pushing member 103 is connected to the needle hub
102 based on the forward movement of the pushing member 103 during the injection, and the injector needle 101 is inserted into the interior of the outer
cylinder 105 when the pushing 103 is moved back after an injection is completed.
In the connection member, there are provided a pair of engaging
shoulders 109 opposing at a lower side of the needle hub 103 at a certain interval,
and a hook part 110 that is detachably inserted into the engaging shoulder 109
during an injection operation, and the needle hub 102 is separated from the
discharge port 104 when the pushing member 103 is moved back and is inserted
into the interior of the outer cylinder 105.
A first push prevention shoulder 130 is provided on an outer surface of
the needle 102 formed at the portion corresponding to the slanted front end of the
discharge port 104 in a circular shape or in a shape of a few protrusions for
preventing a certain gap formation between the discharge port 104 and the needle
hub 102 by a lateral direction pressure of the tapered discharge port 104
generated when the injector needle 101 or the needle hub 102 is pressurized so
that a desired horizontal state is obtained with respect to a blood vessel during an
injection after the needle hub 102 is fixed to the discharge port 104. In addition, a
second push prevention shoulder 113 is provided in an inner surface of the
discharge port 104 formed at the portion corresponding to the protrusion 102a
formed at the outer surface of the needle hub 102 for thereby preventing the
needle hub 102 from being separated from the discharge port 104 by a forward
direction pressure of the tapered discharge port 104 generated by a repulsive
force of the muscle during the injection after the needle hub 102 is engaged to the discharge port 104.
In the drawings, reference numeral 107 represents a stopper formed in an
outer surface of the outer cylinder 105 for preventing the pushing member 103
from being separated from the outer cylinder 105, and 140 represents a gasket
sealingly engaged to an upper end of the pushing member 103.
The operation of the safety injector according to the present invention
will be described with reference to Figures 4, 5 through 15.
As shown in Figure 4, the needle cap 106 is connected with the front end
of the outer cylinder 105 using the first connection member 111, and the needle
hub 102 integrally connected with the front end of the pushing member 103 by
the second connection member 120 is inserted into the interior of the outer
cylinder 105 through the entrance of the lower side of the outer cylinder 105.
As shown in Figure 5, in a state that the user holds the outer cylinder 105
in the downward direction for using an injector, the pushing member 103 is
slightly forwardly moved, so that the needle cap 106 integrally connected
through the outer cylinder 105 and the first connection member 111 is separated.
In addition, the needle hub 102 integrally connected through the pushing member
103 and the second connection member 120 is engaged with the outer cylinder
105. Therefore, in the present invention, the procedure for separating the needle
hub 102 is not needed in a state that the needle cap 106 is held using the other
hand for using the injector needle 101, so that it is possible to prevent a bending
of the injector needle 101 at its end portion. As shown in Figure 6, at the time when the needle cap 106 is separated,
the protrusion 102a of the needle hub 102 is engaged with the second push
prevention shoulder 113 of the discharge port 104, and the first push prevention
shoulder 130 of the needle hub 102 is caught by the angled front end of the
discharge port 104. Therefore, it is possible to prevent a gap formation between
the tapered discharge port 104 and the needle hub 102 formed to correspond
thereto.
As shown in Figure 7, the injector needle 101 is inserted into an injection
medicine bottle A in a state that the needle hub 102 is fixedly supported by the
discharge port 104 of the outer cylinder 105, and the pushing member 103 is
backwardly moved, and the liquid medicine is inputted from the medicine bottle
A into the interior of the outer cylinder 105. At this time, when the pushing
member 103 is backwardly moved, the second connection member 120 integrally
connecting the engaging shoulder 109 of the needle hub 102 and the hook part
110 of the pushing member 103 is cut, and the pushing member 103 is separated
with respect to the needle hub 102.
At this time, the forward and backward movements of the needle hub
102 are prevented in such a manner that the second push prevention shoulder 113
formed in the inner surface of the discharge port 104 is insertion-engaged with
the protrusion 102a of the needle hub 102, and it is prevented from being inserted
into the interior of the outer cylinder 105. The second connection member 120 is
connected between the engaging shoulder 109 of the needle hub 102 and the front end of the hook part 110 at a crossed angle, so that it is easily cut and
separated.
As shown in Figure 8, the pushing member 103 is slightly forwardly
moved for thereby discharging the air. The pushing member 103 is slightly
forwardly moved, and a liquid medicine is injected into the human body. At this
time, since the hook part 110 formed at the front end of the pushing member 103
is inserted through the space between the engaging shoulder 109 with respect to
the engaging shoulder 109 formed at the lower side of the needle hub 102.
Therefore, the needle hub 102 and the pushing member 103 are integrally
engaged in a state that a certain impact is not applied to a patient. At this time,
when pressuring the pushing member 103, the engaging shoulder 109 of the
needle hub 102 is surrounded based on a close engagement of the slanted surface
103 of the needle hub 102 in a state that it is pressurized by the slanted surface
140a of the gasket 14. Therefore, it is possible to prevent a separation between
the engaging shoulder 109 of the needle hub 102 and the hook part 110 of the
pushing member 103. As the gasket 140b pushes the slanted surface 105a of the
outer cylinder 105, and the slanted surface 105a is expanded, so that the needle
hub 102 is easily separated from the needle hub 102. The widening prevention
protrusion 102b is provided below the protrusion 102a of the needle hub 102 for
thereby preventing a widening of the engaging shoulder of the needle hub 103.
As the pushing member 103 is backwardly moved, the injector needle 101 is
inserted into the interior of the outer cylinder 105, so that the procedure for covering the needle cap 106 onto the injector needle 101 of the needle hub 102 is
not needed. Therefore, in the present invention, it. is possible to prevent a user
from being infected by an infectious disease when a sharp end formed when
covering the needle cap 106 onto the needle hub 102 contacts with the injector
needle 101 for collecting the injector needle 101 used.
As shown in Figure 9, in a state that the injector keeps a slight lying state
with respect to the skin for injecting to a patient, when the pushing member 103
is pressurized, namely, the injector needle 101 or the needle hub 102 is
pressurized in such a manner that the injector needle 101 or the needle hub 102
keeps a horizontal state in maximum when the injector needle 101 is inserted or
injected into the body. When a lateral pressure is formed in the tapered discharge
port 104 of the outer cylinder 105, it is possible to prevent a gap and separation
between the needle hub 102 and the discharge port 104 by the first push
prevention shoulder 130 supported by the front end of the tapered discharge port
105 because it is formed in the needle hub 102 in a circular shape or in a shape of
a few protrusions. In the case that the forward pressure is generated in the
discharge port 104, the slanted surface 105a of the outer cylinder 105 is
contracted in a radius direction, and the protrusion 102a of the needle hub 102 is
pressurized for thereby tightening the needle hub 102. Therefore, the forward and
backward movements of the needle hub 102 are prevented with respect to the
outer cylinder 105.
Therefore, the pressure generated at the tapered discharge port 104 can be endured based on a double structure between the first push prevention
shoulder 130 corresponding to the lateral pressure formed at the upper and lower
sides of the needle hub 102 and the protrusion 102a corresponding to the front
side pressure, so that it is possible to prevent a leakage of the injection liquid
from the outer cylinder 105 and to prevent the needle hub 1092 from being
separated from the discharge port 104.
As shown in Figure 10, as the pushing member 103 is backwardly moved,
when the injector needle 101 is fully inserted into the interior of the outer
cylinder 105, the pushing member 102 is slightly forwardly moved. Since the
engaging shoulder 109 of the needle hub 102 is movably engaged with respect to
the hook part 110 of the pushing member 103, the end of the injector needle 101
is caught by the inner wall of the outer cylinder 105 and is applied with a
pressure and is fully bent, so that it is possible to prevent a safety accident of the
collector of the injector wherein the accident may occur due to a sharp injector
needle 101 when collecting the injectors used.
As described above, in the safety injector according to the present
invention, in a state that the outer cylinder 105 is held by one hand in the
downward direction, the pushing member 103 is slightly forwardly moved, and
the needle cap 106 is separated from the outer cylinder 105 for thereby
preventing the injector needle 101 from being bent, and the injector needle 101 is
inserted into the interior of the outer cylinder 105 after an injection. Therefore, a
procedure for covering the needle cap 106 for collecting the injector needle 101 used is not needed. As shown in Figure 11, the pushing member 103 is forwardly
moved, and the injector needle 101 is bent in the outer cylinder 105 and is
discarded.
Therefore, in the present invention, a procedure for separating the
injector needle 101 or covering the same in a state that the needle cap 106 is held
is not needed. Therefore, a sharp injector needle 101 is prevented from damaging
the user for thereby preventing an infection of disease and achieving a desired
safety.
As shown in Figure 12, in the safety injector according to another
embodiment of the present invention, the needle hub 102 and the pushing
member 103 are separately formed, and the protrusion 113 is formed in an inner
surface of the tapered discharge port 104. The groove 102c corresponding to the
protrusion 113 is formed in the needle hub 102. As a connection member for
detachably engaging the needle hub 102 and the pushing member 103, the hook
part 102b is provided at the lower side of the needle hub 102. A pair of engaging
shoulders 103b are formed at the end of the pushing member 103 wherein the
engaging shoulders 103b are opposite to each other with a certain interval to be
detachably engaged to the hook part 102b when the pushing member 103 is
forwardly and backwardly moved.
As shown in Figure 13, in the safety injector according to another
embodiment of the present invention, an extension part Il ia is provided at the
lower side of the needle cap 106 in a radial shape, so that the needle cap 106 is easily separated from the needle hub 103 in a state that it is being caught by the
front end of the discharge port 104 when the pushing member 103 is moved back
in a state that the needle cap 106 is engaged to the needle hub 102 and is
separated from the discharge port 104. The first push prevention shoulder 130 is
provided in an outer surface of the needle hub 102 to prevent a gap between the
discharge port 104 and the needle hub 102 by a lateral pressure of the discharge
port 104 in a structure that the needle hub 102 and the pushing member 103 are
separated from each other when the pushing member 103 is moved back after the
needle hub 102 is engaged to the discharge port 104 when the pushing member
103 is forwardly moved. In addition, a second push prevention shoulder 113 is
formed in an inner surface of the discharge port 104 for preventing the needle
hub 102 from the discharge port 104 by a forward pressure of the discharge port
104. The above constructions are same as the construction of Figure 3. Therefore,
the detailed construction and operation of the same will be omitted, and the
duplicating elements are given the same numbers.
As shown in Figure 14, in the safety injector according to another
embodiment of the present invention, the needle cap 106 is integrally connected
with the outer cylinder 105 having the inwardly tapered discharge port 104 by the
first connection member 111 and is separated with respect to the outer cylinder
104 based on a cutting of the first connection member 111 as the needle hub 102
is fixed to the discharge port 104 based on the forward movement of the pushing
member 103. A circular guide part 150 is integrally formed at a front end of the pushing member 103 movable in the outer cylinder 105. The needle hub 102 is
connected with the guide part 150 and is received in the outer cylinder 105
wherein the injector needle 101 is fixed to the front end and is detachable with
respect to the discharge port 104. A connection member is provided to fix the
needle hub 102 to the discharge port 104, and to separate the pushing member
103 from the needle hub 102 based on a cutting of the second connection
member 120 integrally connecting the needle hub 102 and the pushing member
103 when the pushing member 103 is backwardly moved, and to connect the
pushing member 103 to the needle hub 102 as the pushing member 103 is
forwardly moved during the injection, and to input the injector needle 101 into
the interior of the outer cylinder 105 when the pushing member 103 is moved
back after the injection into the human body. The connection member includes a
pair of engaging shoulders 109 opposite to the lower end of the needle hub 103 at
a certain interval, and a hook part 110 that is detachably engaged with the
engaging shoulder 109 during the injection into the human body and separates
the needle hub 102 from the discharge port 104 when the pushing member 103 is
moved back and inputs into the interior of the outer cylinder 105. In addition, a
first push prevention shoulder 130 is provided in an outer surface of the needle
hub 102 at the portion corresponding to the slanted front end of the discharge
port 104 in a circular shape or a shape of a few protrusions for preventing a gap
between the discharge port 104 and the needle hub 1 by a lateral pressure of the
tapered discharge port 104 generated when the injector needle 101 or the needle hub 102 is pressurized for horizontally maintaining the needle hub 102 in
maximum with respect to the blood vessel after the needle hub 102 is fixed to the
discharge port 104. A second push prevention shoulder 113 is provided in an
inner surface of the discharge port 104 corresponding to the protrusion 102a
formed in the outer surface of the needle hub 102 for preventing the needle hub
102 from being separated from the discharge port 104 by a forward pressure of
the tapered discharge port 104 generated by a repulsive force of the muscle
during the injection after the needle hub 102 is engaged to the discharge port 104.
The connection member includes a pair of engaging shoulders formed opposite to
each other at the lower side of the needle hub, and a hook part inserted into the
engaging shoulder during the injection for separating the needle hub from the
discharge port when the pushing member is moved back and inputting into the
interior of the outer cylinder. The compression spring or plate spring 160 is
installed at an outer surface of the pushing member, so that the pushing member
always stays behind the outer cylinder. The end of the handle 103 a of the pushing
member is eccentrically formed, so that the pushing member is slightly rotated
when pushing the same. As shown in Figure 15, the needle cap 106 is covered on
the outer surface of the discharge port 104 of the outer cylinder 105, and the
needle hub 102 engaged with the pushing member 103 is mounted through the
discharge port 104, and the needle cap 106 is forwardly pushed, so that the
needle cap 106 is separated from the outer surface of the discharge port 104. [Industrial applicability]
The safety injector according to the present invention has the following
advantages.
Since the procedure of injecting is performed by one hand, and the end
of the injector needle is prevented from being bent when separating the needle
cap adapted to protect the injector needle. A procedure for covering the needle
cap for discarding the injectors used is not needed. In the case that the injector
needle is moved into the interior of the outer cylinder, since the other hand is not
used, it is possible to protect the user and the collector of the used injectors from
infectious diseases due to wound caused when the injector needle contacts with a
human body.
In addition, the needle hub and the pushing member are integrally
formed, and the engaging groove is formed in the discharge port of the outer
cylinder in order for the inner side taper and the needle hub to be caught. The
outer cylinder and the needle cap are integrally formed, so that the number of the
fabrication and assembling is decreased. The O-ring adapted to achieve a sealing
of the needle hub with respect to the outer cylinder is not needed, so that the unit
cost and fabrication cost are decreased. Therefore, the disposability and safety
are concurrently achieved.
The needle hub and the pushing member are integrally formed, and the
outer cylinder and the needle cap are integrally connected. When the pushing
member is forwardly moved when in use, the needle cap connected by the connection member is separated from the outer cylinder, and at the same time the
needle hub is engaged to the discharge port of the outer cylinder. When the
pushing member is forwardly moved, the pushing member is separated from the
needle hub, so that it is possible to prevent a reuse of the injector for thereby
basically preventing the infection of disease.
Furthermore, during the injection, it is possible to prevent the needle hub
from being escaped from the outer cylinder by a lateral pressure caused in the
tapered discharge port and the leakage of the injection liquid when the injector
needle or the injector needle is pressurized for maintaining a horizontal state in
maximum with respect to the blood vessel for thereby achieving an accurate
injection operation and reliability.
As the present invention may be embodied in several forms without
departing from the spirit or essential characteristics thereof, it should also be
understood that the above-described examples are not limited by any of the
details of the foregoing description, unless otherwise specified, but rather should
be construed broadly within its spirit and scope as defined in the appended claims,
and therefore all changes and modifications that fall within the meets and bounds
of the claims, or equivalences of such meets and bounds are therefore intended to
be embraced by the appended claims.

Claims

Claims;
1. A safety inj ector, comprising:
an outer cylinder having a tapered discharge port;
a needle cap that is integrally connected with the outer cylinder by a first
connection member and is separated from the outer cylinder based on a cutting of
the first connection member as the pushing member inserted into the outer
cylinder is forwardly moved;
a gasket that easily separates the needle hub from a groove of the
discharge port by expanding an entrance of the discharge port as the pushing
member is forwardly moved, and prevents the engaging shoulder of the needle
hub from being separated from the hook part of the pushing member, and
contacts with an inner wall surface when the end of the injector needle is inserted
into the interior of the outer cylinder; and
a connection means that separates the pushing member from the needle
hub based on a cutting of the second connection member connecting the needle
hub and the pushing member as the pushing member is forwardly moved when
fixing the needle hub to the discharge port, and connects the pushing member to
the needle hub as the pushing member is forwardly moved during an injection
and inserts the injector needle into the outer cylinder when the pushing member
is moved back after injection.
2. The injector of claim 1, wherein said connection means includes a pair of engaging shoulders formed opposite to each other at a lower side of the needle
hub; and a hook part inserted into the engaging shoulder and escapes the needle
hub from the discharge port when the pushing member is moved back and inputs
into the interior of the outer cylinder, wherein a widening prevention protrusion
is provided in the needle hub for preventing a widening of the engaging shoulder
when the engaging shoulder and the hook part of the pushing member are
engaged and moved into the interior.
3. The injector of either claim 1 or claim 2, wherein a first push prevention
shoulder is provided in an outer surface of the needle hub at a portion
corresponding to a slanted front end of the discharge portion in a circular shape
or a shape of a few protrusions for thereby preventing a gap formation between
the discharge port and the needle hub by a lateral pressure of the tapered
discharge port occurring when the injector needle or the needle hub is pressurized
for horizontally maintaining the same in maximum with respect to a blood vessel
during injection after the needle hub is engaged to the discharge port; and a
second push prevention shoulder is provided in an inner surface of the discharge
port to correspond with the protrusion formed in an outer surface of the needle
hub for thereby preventing a separation of the needle hub from the discharge port
by a forward pressure of the tapered discharge port occurring by a repulsive force
of a muscle during injection after the needle hub is engaged to the discharge port.
4. A safety injector, comprising:
an outer cylinder having a tapered discharge port;
an expansion part that is formed in a lower side in a radial shape, and is
caught by a front end of the discharge port when the pushing member is moved
back in a state that the needle cap is engaged with the needle hub, and the needle
cap is escaped from the discharge port, so that the needle cap is easily separated
from the needle hub;
a gasket that easily separates the needle hub from a groove of the
discharge port by expanding an entrance of the discharge port as the pushing
member is forwardly moved, and prevents the engaging shoulder of the needle
hub from being separated from the hook part of the pushing member, and
contacts with an inner wall surface when the end of the injector needle is inserted
into the interior of the outer cylinder; and
a connection means that separates the pushing member from the needle
hub based on a cutting of the second connection member connecting the needle
hub and the pushing member as the pushing member is forwardly moved when
fixing the needle hub to the discharge port, and connects the pushing member to
the needle hub as the pushing member is forwardly moved during an injection
and inserts the injector needle into the outer cylinder when the pushing member
is moved back after injection.
5. A safety inj ector, comprising:
an outer cylinder having a tapered discharge port;
a gasket that easily separates the needle hub from a groove of the
discharge port by expanding an entrance of the discharge port as the pushing
member is forwardly moved, and prevents the engaging shoulder of the needle
hub from being separated from the hook part of the pushing member, and
contacts with an inner wall surface when the end of the injector needle is inserted
into the interior of the outer cylinder;
a connection means that separates the pushing member from the needle
hub based on a cutting of the second connection member connecting the needle
hub and the pushing member as the pushing member is forwardly moved when
fixing the needle hub to the discharge port, and connects the pushing member to
the needle hub as the pushing member is forwardly moved during an injection
and inserts the injector needle into the outer cylinder when the pushing member
is moved back after injection; and
wherein said connection means detachably engages the needle hub
engaged to the discharge port and the pushing member, and the needle hub and
the pushing member are separately formed, and a protrusion is formed in an inner
surface of the discharge port, and a groove opposite to the discharge port is
formed in the needle hub, and a hook part is formed in a lower side of the needle
hub.
6. A safety injector, comprising:
an outer cylinder having a tapered discharge port;
a needle cap that is integrally connected with a first connection member
and is separated with respect to the outer cylinder based on a cutting of the first
connection member when the needle hub is fixed to the discharge port as the
pushing member is forwardly moved;
a circular guide part that is closer to the interior of the outer cylinder
integrally with respect to a front end of the pushing member forwardly and
backwardly movable inserted into the outer cylinder;
a needle hub that is connected with the guide part and is received in the
outer cylinder and is detachably engaged to the tapered discharge port wherein
the injector needle is fixed to the front end; and
a connection means that separates the pushing member from the needle
hub based on a cutting of the second connection member connecting the needle
hub and the pushing member as the pushing member is forwardly moved when
fixing the needle hub to the discharge port, and connects the pushing member to
the needle hub as the pushing member is forwardly moved during an injection
and inserts the injector needle into the outer cylinder when the pushing member
is moved back after injection.
7. The injector of claim 6, wherein a compression spring or a plate spring is
installed in an outer portion of the pushing member, so that the pushing member is always positioned behind the outer cylinder.
8. The injector of either claim 6 or claim 7, wherein said pushing member
is slightly rotated during a procedure that an end of the handle of the pushing
member is eccentrically formed and is pushed.
9. A safety injector, comprising:
an outer cylinder having a tapered discharge port;
a needle cap that is fixed by covering a needle cap on an outer surface of
the discharge port of the outer cylinder and is separated from an outer surface of
the discharge port as the needle hub engaged with the pushing member when in
use is mounted through the discharge port and forwardly move the needle cap;
a circular guide part that is closer to the interior of the outer cylinder
integrally with respect to a front end of the pushing member forwardly and
backwardly movable inserted into the outer cylinder;
a needle hub that is connected with the guide part and is received in the
outer cylinder and is detachably engaged to the tapered discharge port wherein
the injector needle is fixed to the front end; and
a connection means that separates the pushing member from the needle hub
based on a cutting of the second connection member connecting the needle hub
and the pushing member as the pushing member is forwardly moved when fixing
the needle hub to the discharge port, and connects the pushing member to the needle hub as the pushing member is forwardly moved during an injection and
inserts the injector needle into the outer cylinder when the pushing member is
moved back after injection.
PCT/KR2004/000888 2003-04-17 2004-04-17 A safety injector structure WO2004091699A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR1020030024396 2003-04-17
KR10-2003-0024396 2003-04-17
KR20030034061 2003-05-28
KR10-2003-0034061 2003-05-28

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Application Number Title Priority Date Filing Date
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KR (1) KR100601315B1 (en)
WO (1) WO2004091699A1 (en)

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CN107583140A (en) * 2017-09-19 2018-01-16 干学东 A kind of Internal Medicine-Cardiovascular Dept. angina pectoris remissive treatment device

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Publication number Priority date Publication date Assignee Title
WO2014160864A1 (en) * 2013-03-28 2014-10-02 Unitract Syringe Pty Ltd Needle capture retractable needle safety syringes
AU2014241143B2 (en) * 2013-03-28 2019-03-28 Unl Holdings Llc Needle capture retractable needle safety syringes
US11298466B2 (en) 2013-03-28 2022-04-12 Unl Holdings Llc Needle capture retractable needle safety syringes
CN107583140A (en) * 2017-09-19 2018-01-16 干学东 A kind of Internal Medicine-Cardiovascular Dept. angina pectoris remissive treatment device
CN107583140B (en) * 2017-09-19 2020-04-28 干学东 Angina pectoris alleviating and treating device for cardiovascular internal medicine

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