CN111888580B - Safety syringe - Google Patents
Safety syringe Download PDFInfo
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- CN111888580B CN111888580B CN202010946448.8A CN202010946448A CN111888580B CN 111888580 B CN111888580 B CN 111888580B CN 202010946448 A CN202010946448 A CN 202010946448A CN 111888580 B CN111888580 B CN 111888580B
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- syringe
- locking
- sleeve body
- spring
- claw
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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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—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
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/178—Syringes
- A61M5/31—Details
- A61M5/32—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
- A61M5/3213—Caps placed axially onto the needle, e.g. equipped with finger protection guards
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- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
- A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
- A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
- A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
- 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
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- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Hematology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Environmental & Geological Engineering (AREA)
- Infusion, Injection, And Reservoir Apparatuses (AREA)
Abstract
The invention relates to a safety syringe, which comprises a syringe needle head protection device and a syringe; the syringe is fixedly arranged in the syringe needle head protecting device; the syringe needle protecting device comprises an outer protecting sleeve, an inner mounting sleeve and a spring; the spring is sleeved on the outer wall of the mounting inner sleeve, and the spring is compressed and then is loaded into the protective outer sleeve to form the syringe needle head protective device. Compared with the existing protection device, the invention has simple structure, is easy to produce and assemble, and can effectively protect the needle head part of the syringe; meanwhile, the piston rod of the injector can be locked after injection is finished, and secondary use is effectively avoided.
Description
Technical Field
The invention relates to a safety syringe with a syringe needle protection device.
Background
The disposable syringe is the most common apparatus in the medical field at present, and in order to prevent the syringe needle after use from accidentally injuring a user to cause medicine pollution or prevent the syringe from being used for a second time, the syringe needle is generally required to be uniformly recovered after injection is finished at present; however, with the further strict management of medical devices, some mechanisms have required that a special protection device is additionally arranged on the disposable syringe, and after the injection is completed, the protection device is started to protect the needle head part, so that the needle head is prevented from being accidentally injured, the needle head is also prevented from being separated from the syringe body, and the use safety of the disposable syringe is improved.
The researches on the syringe needle protection device and the corresponding safety syringe are firstly carried out in European and American countries, and the corresponding patent technical schemes are mostly proposed by European and American enterprises, for example, the Chinese patent publication No. CN104411351A is used for the anti-needle-prick safety device of the injection device, the Chinese patent publication No. CN101437561A is used for the passive bolt lock ring safety protection device of the injection device, the Chinese patent publication No. CN1189222A is used for the disposable safety syringe, and the like, and the early stage is limited by the performance of the molding material, the protection requirements and the like, and the syringe needle protection device and the corresponding safety syringe are mostly complex in structure, inconvenient to operate and high in manufacturing cost.
In recent years, with the attention of domestic related enterprises to the field, related technologies have appeared, such as a sliding sleeve type needle protection device and a safety syringe with a chinese patent publication number of CN203043181U, a needle protection device and a safety syringe with a chinese patent publication number of CN111529825A, and a syringe needle protection device with a chinese patent publication number of CN 105854131A; the product has certain needle protecting performance, but part of the structure is still complex.
In order to further improve the operational convenience of the syringe needle protecting device and to improve the safety, further improvement of the related structure is necessary.
Disclosure of Invention
The invention aims to provide a safety syringe, which aims to improve the operation convenience and safety.
In order to achieve the aim, the invention provides a safety syringe which is characterized by comprising a syringe needle head protection device and a syringe; the syringe is fixedly arranged in the syringe needle head protecting device;
the syringe needle protecting device comprises an outer protecting sleeve, an inner mounting sleeve and a spring;
the spring is sleeved on the outer wall of the mounting inner sleeve, and the spring is compressed and then is loaded into the protective outer sleeve to form the syringe needle head protective device;
the protective outer sleeve comprises an outer sleeve opening, an outer sleeve body, a guide chute, an inner spigot, a spring mounting seat and a locking inner jaw;
the outer sleeve opening is arranged at the bottom of the outer sleeve body;
the wall surface of the outer sleeve body is provided with the guide sliding groove;
an inner spigot is arranged in the middle of the inner wall of the outer sleeve barrel;
the upper part of the outer sleeve barrel is provided with a spring mounting seat, the diameter of the bottom of the spring mounting seat is larger than the inner diameter of the outer sleeve barrel, and the spring is stored in the spring mounting seat;
locking inner clamping jaws are arranged above the spring mounting seat, and more than 2 locking inner clamping jaws are arranged along the circumferential direction of the spring mounting seat;
the mounting inner sleeve comprises an inner sleeve body, a stopping claw, a guide block, a locking outer claw, a claw frame, a releasing inclined plane, a syringe flange fixing claw and a syringe flange fixing groove;
the inner sleeve body is mounted within the outer sleeve body, the inner sleeve body being adapted to receive a syringe;
the bottom of the inner sleeve barrel is provided with the backstop claw which is obliquely arranged outwards; in a natural state before assembly, the diameter of a concentric circle where the bottom of the retaining claw is located is larger than the inner diameter of the outer sleeve body;
the inner sleeve body is provided with a guide block, the guide block is positioned at the lower part of the inner sleeve body, and the guide block protrudes out of the outer wall surface of the inner sleeve body; the guide block is buckled into the guide sliding groove;
the top of the inner sleeve body is provided with a protection device locking mechanism, a protection device releasing mechanism and an injector fixing mechanism;
the locking mechanism of the protection device comprises a locking outer clamping jaw, and the locking outer clamping jaw and the locking inner clamping jaw are buckled with each other to realize the locking of the syringe needle protection device; the locking outer claw cantilever is fixed on the claw frame;
the protection device releasing mechanism comprises a releasing inclined plane, and the releasing inclined plane is arranged on the inner side of the cantilever above the locking outer clamping jaw and is positioned below the clamping jaw frame;
the syringe fixing mechanism comprises syringe flange fixing claws and a syringe flange fixing groove, the syringe flange fixing groove is positioned at the top end of the inner sleeve body, a plurality of syringe flange fixing claws are arranged above the syringe flange fixing groove, and the syringe flange fixing claws are provided with guide inclined planes;
the syringe comprises a syringe barrel, a piston rod, a needle head and a needle head sleeve;
the top of the syringe barrel is provided with a syringe flange; the syringe flange is fixed in the syringe flange fixing groove and is positioned below the syringe flange fixing claw;
the top of the piston rod is provided with a release excitation sheet; the diameter of the release excitation sheet is larger than that of a concentric circle where the bottom of the release inclined plane is located.
As a further improvement of the invention, the protective outer sleeve is provided with a locking protective sheet which is arranged at the outer side of the locking inner clamping jaw; and an insertion space of the locking outer clamping jaw is reserved between the locking inner clamping jaw and the locking protection sheet.
As a further improvement of the invention, the protective outer sleeve is provided with a handle wing piece, and the handle wing piece is provided with 2 pieces which are symmetrically arranged on the outer wall of the spring mounting seat or the outer sleeve body.
Furthermore, a plurality of anti-slip strips are arranged on the bottom surface of the handle wing piece.
As a further improvement of the invention, the opening part of the outer sleeve opening is inclined inwards to form an inner cone.
As a further improvement of the invention, more than 2 guide sliding chutes are symmetrically arranged on the wall surface of the protective outer sleeve; the guide blocks are correspondingly provided with more than 2 and are symmetrically arranged on the wall surface of the inner sleeve body.
As a further improvement of the invention, a plurality of spring limiting clamps are arranged on the inner side of the bottom of the spring mounting seat, and the spring limiting clamps are protruded and uniformly distributed on the top of the outer sleeve barrel; the inner diameter of the spring is clamped on the outer side of a limiting part formed by the spring limiting clamp.
As a further improvement of the invention, the bottom of the inner sleeve body is provided with the needle cover backstop sheet which is arranged obliquely inwards; the diameter of a concentric circle where the bottom of the needle head sleeve backstop sheet is located is smaller than the inner diameter of the inner sleeve body;
when the needle cover of the syringe is not installed, the diameter of the concentric circle where the bottom of the needle cover backstop sheet is located is smaller than the outer diameter of the top of the needle cover of the syringe.
Furthermore, the needle head sleeve backstop sheet and the backstop claw are respectively provided with more than 2; the needle head sleeve backstop sheet and the backstop claw are evenly distributed at the bottom of the inner sleeve barrel at intervals.
As a further improvement of the invention, the bottom of the guide block is connected with the inner sleeve body through a connecting strip, the upper part of the guide block is suspended, and the guide block can be inclined inwards along the connecting strip.
Furthermore, the inner sleeve body at the position of the guide block is provided with a window, and the window opening direction corresponds to the direction of the guide sliding chute; the syringe barrel is visible from the outside through the guide chute and the window.
As a further improvement of the invention, a piston fixing step is arranged below the release inclined plane, and the piston fixing step is positioned on the inner side of the cantilever above the locking outer clamping jaw; the piston fixing step is higher than the top of the syringe flange fixing claw.
The syringe needle protection device is provided with 2 states, namely a locking state and a protection state after release; when the locking state is realized, the locking inner clamping jaw and the locking outer clamping jaw are buckled with each other for locking, and the spring is compressed for storing energy; when the syringe is used, a syringe is installed into the installation inner sleeve of the syringe needle head protection device, the syringe flange is clamped into the syringe flange fixing groove, and the syringe flange fixing claw is used for locking; then, pulling out the needle head sleeve to expose the needle head, and carrying out injection operation; in the injection process, the piston rod is pushed to push the medicine; at the end of pushing the medicine, the piston rod props up the locking outer clamping claw, the locking outer clamping claw is separated from the locking inner clamping claw, and meanwhile, the exciting sheet is released to be clamped into the piston fixing step to lock the position of the piston rod; after the medicine is pushed, an operator releases the injector and the injector needle head protecting device, the spring starts to release, the outer protective sleeve and the inner mounting sleeve move relatively, so that the outer sleeve port shields and protects the needle head, and the protection state after the release is achieved; at the moment, the guide block slides to the top end of the guide sliding chute to prevent the outer protective sleeve from being separated from the inner mounting sleeve; simultaneously, the stopping claw is bounced open and is blocked in the interior tang, prevent the overcoat with installation endotheca retracts relatively again, exposes the syringe needle.
The protective outer sleeve and the mounting inner sleeve are made of plastics, particularly, related parts of the mounting inner sleeve, such as the needle sleeve anti-return sheet, the anti-return claw, the connecting strip, the locking outer clamping claw and the syringe flange fixing claw have good elasticity, and can be bent to a certain extent and reset elastically according to the requirements of different stages.
The syringe needle protecting device provided by the invention adopts the outer protecting sleeve and the inner mounting sleeve which are made of plastics, and the materials have certain elasticity and toughness and are convenient to assemble.
Compared with the existing protection device, the syringe needle protection device has the advantages of simple structure, easy production and assembly, and effective protection of the needle part of the syringe; meanwhile, the piston rod of the injector can be locked after injection is finished, and secondary use is effectively avoided.
Drawings
FIG. 1 is an exploded view of the components of the protective device of the present invention;
FIG. 2 is an assembled cross-sectional view of the protective device of the present invention;
FIG. 3 is a schematic view of the construction of the protective outer cover of the present invention;
FIG. 4 is a schematic structural diagram of the installation inner sleeve of the present invention 1;
FIG. 5 is a schematic structural diagram of the installation inner sleeve of the present invention 2;
FIG. 6 is an exploded view of the components of the injector of the present invention;
FIG. 7 is an assembled cross-sectional view of the safety syringe of the present invention;
FIG. 8 is a schematic view of the assembled structure of the safety syringe of the present invention 1;
FIG. 9 is a schematic view of the assembled structure of the safety syringe of the present invention, FIG. 2;
FIG. 10 is a sectional view of the protection release process state 1 of the safety syringe of the present invention;
FIG. 11 is a sectional view of the protection release process state 2 of the safety syringe of the present invention;
FIG. 12 is a schematic view of the protective release process of the safety syringe of the present invention;
FIG. 13 is a schematic view of the safety syringe of the present invention in a protective state;
FIG. 14 is a sectional view of the safety syringe 1 in a protection state of the present invention;
FIG. 15 is a sectional view of the safety syringe of the present invention in a protection state 2;
reference numerals: the protection device comprises a protection outer sleeve 1, a mounting inner sleeve 2 and a spring 3; a syringe barrel 4, a piston rod 5, a needle 6 and a needle cover 7;
the locking device comprises an outer sleeve opening 11, an outer sleeve body 12, a guide sliding groove 13, an inner spigot 14, a spring mounting seat 15, a locking inner claw 16, a locking protection sheet 17 and a handle wing 18; a spring limit catch 151; the antislip strips 19;
the needle cover retaining sheet 21, the retaining claw 22, the guide block 23, the locking outer claw 24, the claw frame 25, the release inclined plane 26, the piston fixing step 27, the syringe flange fixing claw 28 and the syringe flange fixing groove 29; a connecting strip 231;
a syringe flange 41; the trigger piece 51 and the push head 52 are released.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
As shown in figure 1, the syringe needle protection device of the invention comprises a protective outer sleeve 1, a mounting inner sleeve 2 and a spring 3; the spring 3 is sleeved outside the mounting inner sleeve 2, and the spring 3 is compressed and then is loaded into the protective outer sleeve 1, so that the syringe needle protecting device is formed and is used after the syringe is assembled.
As shown in fig. 2 and 3, the protective outer sleeve 1 comprises an outer sleeve opening 11, an outer sleeve body 12, a guide sliding groove 13, an inner spigot 14, a spring mounting seat 15, a locking inner claw 16, a locking protection sheet 17 and a handle wing 18; the opening part of the outer sleeve opening 11 is inclined inwards to form an inner cone, so that a certain protection effect is achieved; the outer casing port 11 is arranged at the bottom of the outer casing body 12; the wall surface of the outer sleeve body 12 is provided with guide sliding grooves 13, and preferably 2 guide sliding grooves 13 are symmetrically arranged; an inner spigot 14 is arranged in the middle of the inner wall of the outer sleeve body 12, and preferably 2 inner spigots 14 are symmetrically arranged; a spring mounting seat 15 is arranged at the upper part of the outer sleeve body 12, the diameter of the bottom of the spring mounting seat 15 is larger than the inner diameter of the outer sleeve body 12, a spring 3 is stored in the spring mounting seat 15, and the diameter of the spring 3 is matched with that of the spring mounting seat 15, so that the spring 3 cannot be clamped into the outer sleeve body 12; preferably, a plurality of spring limiting clamps 151 are arranged on the inner side of the bottom of the spring mounting seat 15, and the spring limiting clamps 151 can limit the inner side of the bottom of the spring 3 better, so that the spring 3 is prevented from being clamped into the outer sleeve body 12 by mistake; locking inner claws 16 are arranged above the spring mounting seat 15, and more than 2 locking inner claws 16 are arranged along the circumferential direction of the spring mounting seat 15; a handle wing piece 18 is further arranged, conventionally, two handle wing pieces 18 are used as a pair and are symmetrically arranged on the outer wall of the spring mounting seat 15 or the outer sleeve body 12, so that the finger of an operator can be hooked conveniently; the bottom surface of the handle wing piece 18 is provided with a plurality of anti-slip strips 19 to increase the friction force; preferably, a corresponding locking guard 17 is provided on the outer side of the locking inner jaw 16, the locking guard 17 may be provided on the upper surface of the handle tab 18, and a locking installation space is left between the locking inner jaw 16 and the locking guard 17.
As shown in fig. 2, 4 and 5, the mounting inner sleeve 2 comprises an inner sleeve body, a needle sleeve retaining piece 21, a retaining claw 22, a guide block 23, a locking outer claw 24, a claw frame 25, a release inclined plane 26, a piston fixing step 27, a syringe flange fixing claw 28 and a syringe flange fixing groove 29; when assembled, the inner sleeve fits within the outer sleeve 12, the inner sleeve being adapted to receive a syringe; the bottom of the inner sleeve body is provided with the needle head sleeve backstop sheet 21 and a backstop claw 22; the needle head sleeve retaining sheet 21 is arranged in an inward inclined mode, and the retaining claw 22 is arranged in an outward inclined mode; preferably, the needle cover retaining pieces 21 and the retaining claws 22 are respectively provided with more than 2, in the embodiment, 2 needle cover retaining pieces are symmetrically arranged and are mutually separated by 90 degrees and uniformly distributed at the bottom of the inner sleeve body; in a natural state, the diameter of the bottom formed by a plurality of needle sleeve retaining sheets 21 is smaller than the inner diameter of the inner sleeve body, and the diameter of the bottom formed by a plurality of retaining claws 22 is larger than the inner diameter of the outer sleeve body 12; the inner sleeve body is provided with a guide block 23, the guide block 23 is positioned at the lower part of the inner sleeve body, and the guide block 23 protrudes out of the outer wall surface of the inner sleeve body; the guide block 23 is buckled into the guide chute 13; preferably, the bottom of the guide block 23 is connected with the inner sleeve body through a connecting strip 231, so that the upper part of the guide block 23 is suspended, and during assembly, the guide block 23 is extruded by the inner wall of the outer sleeve body 12, can incline inwards along the connecting strip 231, and slides into the guide sliding groove 13, thereby facilitating assembly. Preferably, the inner sleeve body at the position of the guide block 23 is provided with a window corresponding to the guide chute 13, so that the liquid medicine state in the syringe can be conveniently and directly checked from the outside.
The top of the inner sleeve body is provided with a protection device locking mechanism, a protection device releasing mechanism and an injector fixing mechanism.
The protection device locking mechanism comprises a locking outer jaw 24, and the locking outer jaw 24 is butted with the locking inner jaw 16 to realize the locking of the protection device; the locking outer clamping jaw 24 is fixed on the clamping jaw frame 25 in a cantilever manner, when the mounting inner sleeve 2 is pressed downwards into the protective outer sleeve 1, the bottom of the locking outer clamping jaw 24 is in contact with the top of the locking inner clamping jaw 16, when the mounting inner sleeve is pressed downwards, the locking outer clamping jaw 24 deflects around the clamping jaw frame 25, the two clamping jaws are buckled and butted with each other finally, the spring 3 is compressed, and the assembly of the syringe needle head protective device is completed.
The guard release mechanism includes a release ramp 26, the release ramp 26 being disposed on the inside of the cantilever above the locking outer jaw 24 and below the jaw frame 25.
The syringe fixing mechanism comprises syringe flange fixing claws 28 and a syringe flange fixing groove 29, the syringe flange fixing groove 29 is positioned at the top end of the inner sleeve body, a plurality of syringe flange fixing claws 28 are arranged above the syringe flange fixing groove 29, and the syringe flange fixing claws 28 are provided with guide inclined planes.
Further, a piston fixing step 27 is arranged below the release inclined surface 26, and the piston fixing step 27 is positioned on the inner side of the cantilever above the locking outer jaw 24; the piston holding step 27 is higher than the top of the syringe flange holding claw 28.
Fig. 6 shows a syringe, comprising a syringe barrel 4, a piston rod 5, a needle 6 and a needle cover 7; the top of the syringe barrel 4 is provided with a syringe flange 41; the top of the piston rod 5 is provided with a push head 52, and a release excitation sheet 51 is further arranged below the push head 52; in some cases, the pushing head 52 is designed to be flat, so as to achieve the function of the release sheet 51.
As shown in fig. 7 and 8, after the syringe is filled with the medicine, the syringe is integrally mounted in the inner sleeve of the mounting sleeve 2 of the syringe needle protector, the syringe flange 41 of the syringe barrel 4 presses the upper inclined surface of the syringe flange fixing claw 28, so that the syringe flange fixing claw 28 is pressed into the syringe flange fixing groove 29 after being bent and deformed along the root, and the syringe flange fixing claw 28 is elastically restored to position the syringe flange 41, thereby fixing the syringe in the syringe needle protector.
As shown in figure 9, in use, the needle cover 7 is removed to expose the needle 6; at the moment, the needle cover retaining sheet 21 elastically resets to prevent the needle cover 7 from being inserted back again for secondary use; the medicine is injected through the needle 6 by gripping the grip wing 18 and pushing the pusher 52.
As shown in fig. 10 and 11, at the end of the drug annotation, the release trigger 51 is snapped into the release ramp 26, the locking outer jaw 24 is opened to disengage from the locking inner jaw 16, and finally the release trigger 51 is snapped into the piston fixing step 27 completely, the activation release is completed, and the release is started.
As shown in fig. 12, after the injection is completed, the release trigger 51 is completely snapped into the position of the piston fixing step 27, so as to fix the piston rod 5 and the syringe barrel 4; when an operator loosens the safety syringe, the spring 3 starts to be released, the outer protective sleeve 1 and the inner mounting sleeve 2 are pushed to start to move relatively, the inner locking claw 16 is separated from the outer locking claw 24, and the outer cannula opening 11 gradually shields and protects the needle 6; in the process, the guide block 23 slides along the guide runner 13.
As shown in fig. 13 to 15, the spring 3 starts to be released, and the protective outer sleeve 1 and the mounting inner sleeve 2 move to the longest state relatively; as shown in fig. 13 and 15, at this time, the guide block 23 slides to the top end of the guide chute 13 to prevent the outer protective sleeve 1 from being separated from the inner mounting sleeve 2; meanwhile, as shown in fig. 14, the retaining claws 22 are bounced open and snapped into the inner seam allowance 14, so as to prevent the outer protective sleeve 1 and the inner mounting sleeve 2 from retracting again relatively to each other and expose the needle 6.
According to the syringe needle protecting device, the locking inner clamping jaws 16 and the locking outer clamping jaws 24 are buckled with each other for locking, so that the spring 3 is compressed and stored with energy; after the syringe needle protection device is independently assembled, when the syringe needle protection device is used, a syringe is installed into the installation inner sleeve 2 of the syringe needle protection device, the syringe flange 41 is clamped into the syringe flange fixing groove 29 and is locked by the syringe flange fixing claws 28; then, the needle cover 7 is pulled out to expose the needle 6, and injection operation is carried out; in the injection process, the piston rod 5 is pushed to push the medicine; at the end of pushing the medicine, the piston rod 5 props up the locking outer clamping jaws 24 to be separated from the locking inner clamping jaws 16, and simultaneously the release excitation sheet 51 is clamped into the piston fixing step 27 to lock the position of the piston rod 5; after the medicine pushing is finished, an operator releases the injector and the injector needle head protection device, the spring 3 starts to release, and the outer protection sleeve 1 and the inner installation sleeve 2 move relatively to shield and protect the needle head 6 through the outer sleeve opening 11.
In the syringe needle protection device of the present invention, the protective outer sleeve 1 and the mounting inner sleeve 2 are made of plastic, and particularly, the related components of the mounting inner sleeve 2, such as the needle sleeve retaining piece 21, the retaining claw 22, the connecting strip 231, the locking outer clamping claw 24 and the syringe flange fixing claw 28, have good elasticity, and can generate certain bending and elastic reset according to the requirements of different stages. The syringe needle protection device has a simple structure, and the formed corresponding safety syringe can have a good protection effect on the needle 6 after being used.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are given by way of illustration of the principles of the present invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (12)
1. A safety syringe is characterized by comprising a syringe needle head protecting device and a syringe; the syringe is fixedly arranged in the syringe needle head protecting device;
the syringe needle protecting device comprises an outer protecting sleeve, an inner mounting sleeve and a spring;
the spring is sleeved on the outer wall of the mounting inner sleeve, and the spring is compressed and then is loaded into the protective outer sleeve to form the syringe needle head protective device;
the protective outer sleeve comprises an outer sleeve opening, an outer sleeve body, a guide chute, an inner spigot, a spring mounting seat and a locking inner jaw;
the outer sleeve opening is arranged at the bottom of the outer sleeve body;
the wall surface of the outer sleeve body is provided with the guide sliding groove;
an inner spigot is arranged in the middle of the inner wall of the outer sleeve barrel;
the upper part of the outer sleeve barrel is provided with a spring mounting seat, the diameter of the bottom of the spring mounting seat is larger than the inner diameter of the outer sleeve barrel, and the spring is stored in the spring mounting seat;
locking inner clamping jaws are arranged above the spring mounting seat, and more than 2 locking inner clamping jaws are arranged along the circumferential direction of the spring mounting seat;
the mounting inner sleeve comprises an inner sleeve body, a stopping claw, a guide block, a locking outer claw, a claw frame, a releasing inclined plane, a syringe flange fixing claw and a syringe flange fixing groove;
the inner sleeve body is mounted within the outer sleeve body, the inner sleeve body being adapted to receive a syringe;
the bottom of the inner sleeve barrel is provided with the backstop claw which is obliquely arranged outwards; in a natural state before assembly, the diameter of a concentric circle where the bottom of the retaining claw is located is larger than the inner diameter of the outer sleeve body;
the inner sleeve body is provided with a guide block, the guide block is positioned at the lower part of the inner sleeve body, and the guide block protrudes out of the outer wall surface of the inner sleeve body; the guide block is buckled into the guide sliding groove;
the top of the inner sleeve body is provided with a protection device locking mechanism, a protection device releasing mechanism and an injector fixing mechanism;
the locking mechanism of the protection device comprises a locking outer clamping jaw, and the locking outer clamping jaw and the locking inner clamping jaw are buckled with each other to realize the locking of the syringe needle protection device; the locking outer claw cantilever is fixed on the claw frame;
the protection device releasing mechanism comprises a releasing inclined plane, and the releasing inclined plane is arranged on the inner side of the cantilever above the locking outer clamping jaw and is positioned below the clamping jaw frame;
the syringe fixing mechanism comprises syringe flange fixing claws and a syringe flange fixing groove, the syringe flange fixing groove is positioned at the top end of the inner sleeve body, a plurality of syringe flange fixing claws are arranged above the syringe flange fixing groove, and the syringe flange fixing claws are provided with guide inclined planes;
the syringe comprises a syringe barrel, a piston rod, a needle head and a needle head sleeve;
the top of the syringe barrel is provided with a syringe flange; the syringe flange is fixed in the syringe flange fixing groove and is positioned below the syringe flange fixing claw;
the top of the piston rod is provided with a release excitation sheet; the diameter of the release excitation sheet is larger than that of a concentric circle where the bottom of the release inclined plane is located.
2. A safety syringe as claimed in claim 1, wherein the protective outer sleeve is provided with a locking guard disposed outside the locking inner jaw; and an insertion space of the locking outer clamping jaw is reserved between the locking inner clamping jaw and the locking protection sheet.
3. A safety syringe as claimed in claim 1, wherein the protective sheath is provided with a handle tab, said handle tab having 2 pieces symmetrically disposed on the outer wall of the spring mounting seat or the outer sleeve body.
4. A safety syringe according to claim 3 wherein anti-slip strips are provided on the underside of the handle tabs.
5. A safety syringe according to claim 1 wherein the outer cannula port opening is inwardly tapered to form an internal cone.
6. A safety syringe as claimed in claim 1, wherein said guide grooves are provided in a number of 2 or more, symmetrically arranged on the wall surface of said protective casing; the guide blocks are correspondingly provided with more than 2 and are symmetrically arranged on the wall surface of the inner sleeve body.
7. A safety syringe as claimed in claim 1, wherein a plurality of spring retaining clips are provided on the inner side of the bottom of said spring mounting seat, said spring retaining clips being raised and evenly distributed on the top of said outer sleeve body; the inner diameter of the spring is clamped on the outer side of a limiting part formed by the spring limiting clamp.
8. A safety syringe as claimed in claim 1, characterised in that the base of said inner barrel is provided with said needle cover back stop tab, said needle cover back stop tab being inclined inwardly; the diameter of a concentric circle where the bottom of the needle head sleeve backstop sheet is located is smaller than the inner diameter of the inner sleeve body;
when the needle cover of the syringe is not installed, the diameter of the concentric circle where the bottom of the needle cover backstop sheet is located is smaller than the outer diameter of the top of the needle cover of the syringe.
9. A safety syringe as claimed in claim 8, wherein there are more than 2 needle cover retaining tabs and retaining claws; the needle head sleeve backstop sheet and the backstop claw are evenly distributed at the bottom of the inner sleeve barrel at intervals.
10. A safety syringe as claimed in claim 1, wherein the bottom of said guide block is connected to said inner sleeve body by a connecting strip, the upper portion of said guide block is suspended, and said guide block can be tilted inwardly along said connecting strip.
11. A safety syringe according to claim 10, wherein the inner sleeve in the region of the guide block is provided with a window, the window being oriented in a direction corresponding to the orientation of the guide runner; the syringe barrel is visible from the outside through the guide chute and the window.
12. A safety syringe according to claim 1, wherein a plunger holding step is provided below the release ramp, the plunger holding step being located inside the cantilever above the locking outer jaw; the piston fixing step is higher than the top of the syringe flange fixing claw.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010946448.8A CN111888580B (en) | 2020-09-10 | 2020-09-10 | Safety syringe |
| DE212021000440.7U DE212021000440U1 (en) | 2020-09-10 | 2021-06-25 | Syringe guard and safety syringe |
| EP21865631.2A EP4212194A1 (en) | 2020-09-10 | 2021-06-25 | Syringe protection device and safe syringe |
| US18/025,796 US20230355893A1 (en) | 2020-09-10 | 2021-06-25 | Syringe Protector and Its Safety Syringe |
| PCT/CN2021/102380 WO2022052575A1 (en) | 2020-09-10 | 2021-06-25 | Syringe protection device and safe syringe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010946448.8A CN111888580B (en) | 2020-09-10 | 2020-09-10 | Safety syringe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111888580A CN111888580A (en) | 2020-11-06 |
| CN111888580B true CN111888580B (en) | 2022-03-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010946448.8A Active CN111888580B (en) | 2020-09-10 | 2020-09-10 | Safety syringe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111888580B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230355893A1 (en) * | 2020-09-10 | 2023-11-09 | Suzhou Savicred Biotechnology Co., Ltd. | Syringe Protector and Its Safety Syringe |
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|---|---|---|---|---|
| CN1288391A (en) * | 1998-01-20 | 2001-03-21 | 塞尔焦·雷斯特利 | Disposable safety syringe |
| CN103301528A (en) * | 2013-06-18 | 2013-09-18 | 浙江康德莱医疗器械股份有限公司 | Safe intravenous infusion indwelling needle component |
| CN106215284A (en) * | 2016-07-07 | 2016-12-14 | 邓源基 | The clutch of pen-type injector |
| CN107823761A (en) * | 2017-12-08 | 2018-03-23 | 宁波美生医疗器材有限公司 | A kind of new type of safe novopen, which is matched somebody with somebody, applies mechanically pin |
| CN109496158A (en) * | 2018-07-24 | 2019-03-19 | 江苏采纳医疗科技有限公司 | A kind of disposable anti-needle thorn insulin injection pen needle and anti-needle-punching method |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2799375B1 (en) * | 1999-10-07 | 2002-01-18 | Marc Brunel | SINGLE USE INJECTION DEVICE |
| FR2837107B1 (en) * | 2002-03-18 | 2005-02-25 | Sedat | NEEDLE PROTECTION DEVICE FOR SYRINGE, AND INJECTION DEVICE COMPRISING SYRINGE AND PROTECTIVE DEVICE |
| DE102010010699A1 (en) * | 2010-03-08 | 2011-09-08 | Lts Lohmann Therapie-Systeme Ag | Method and device for filling a disposable injector |
| CN108434556A (en) * | 2018-05-23 | 2018-08-24 | 苏州鹏烨医疗科技有限公司 | Injection pen |
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2020
- 2020-09-10 CN CN202010946448.8A patent/CN111888580B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1288391A (en) * | 1998-01-20 | 2001-03-21 | 塞尔焦·雷斯特利 | Disposable safety syringe |
| CN103301528A (en) * | 2013-06-18 | 2013-09-18 | 浙江康德莱医疗器械股份有限公司 | Safe intravenous infusion indwelling needle component |
| CN106215284A (en) * | 2016-07-07 | 2016-12-14 | 邓源基 | The clutch of pen-type injector |
| CN107823761A (en) * | 2017-12-08 | 2018-03-23 | 宁波美生医疗器材有限公司 | A kind of new type of safe novopen, which is matched somebody with somebody, applies mechanically pin |
| CN109496158A (en) * | 2018-07-24 | 2019-03-19 | 江苏采纳医疗科技有限公司 | A kind of disposable anti-needle thorn insulin injection pen needle and anti-needle-punching method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111888580A (en) | 2020-11-06 |
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