CN111888581A - Safety syringe with needle protector - Google Patents
Safety syringe with needle protector Download PDFInfo
- Publication number
- CN111888581A CN111888581A CN202010947075.6A CN202010947075A CN111888581A CN 111888581 A CN111888581 A CN 111888581A CN 202010947075 A CN202010947075 A CN 202010947075A CN 111888581 A CN111888581 A CN 111888581A
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- Prior art keywords
- syringe
- spring
- needle
- needle head
- sleeve
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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
- A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
- A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
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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
- 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)
- Hematology (AREA)
- Anesthesiology (AREA)
- Biomedical Technology (AREA)
- Heart & Thoracic Surgery (AREA)
- Vascular Medicine (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 with a needle head protection device, which comprises a protective outer sleeve, an installation inner sleeve, a spring and a syringe; the mounting inner sleeve is sleeved with the spring and is arranged in the protective outer sleeve to form a needle head protective device; the syringe is arranged in the needle head protection device; the top of the outer sleeve body is provided with a spring mounting table; the upper part of the outer sleeve body is provided with a backstop elastic sheet; a raised guide pin is arranged on the inner side of the upper part of the outer sleeve body; the lower part of the inner sleeve body for mounting the inner sleeve is provided with a backstop window; the wall surface of the inner sleeve body for mounting the inner sleeve is also provided with a guide window, and the guide pin is clamped in the guide window, so that the outer protective sleeve can only move relative to the inner sleeve along the guide window. The safety syringe has simple structure, is easy to produce and assemble, and can effectively protect the needle head part of the syringe.
Description
Technical Field
The invention relates to a safety syringe with a 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 with a needle head protection device, so as to improve the operation convenience and the safety.
In order to achieve the above object, the present invention provides a safety syringe with a needle protector, which is characterized by comprising a syringe needle protector and a syringe;
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 fixed flange; a piston rod is inserted in the syringe barrel; the bottom of the syringe barrel is provided with a needle head; a removable needle cover is arranged outside the needle;
the syringe needle protecting device comprises an outer protecting sleeve, an inner mounting sleeve and a spring; the outer wall of the mounting inner sleeve is sleeved with the spring and is arranged in the protective outer sleeve to form the syringe needle protecting device; the syringe is arranged in the needle head protection device;
the protective outer sleeve is provided with an outer sleeve body, the inner part of the outer sleeve body is a hollow cavity, and the inner cavity is used for accommodating the mounting inner sleeve; the top of the outer sleeve body is provided with a spring mounting table; the spring is arranged on a spring mounting table above the outer sleeve body;
the upper part of the outer sleeve body is provided with a backstop elastic sheet, and the top of the backstop elastic sheet is a free end and inclines inwards; the inner side of the top of the backstop elastic sheet is positioned in the section of the inner wall of the outer sleeve barrel in a free state;
a raised guide pin is arranged on the inner side of the upper part of the outer sleeve body;
an inner sleeve body is sleeved in the mounting inner sleeve body, a hollow cavity is formed inside the inner sleeve body, and an injector is accommodated in the hollow cavity; the outer side of the inner sleeve body is sleeved in the outer sleeve body of the protective outer sleeve; the top of the mounting inner sleeve is provided with a syringe fixing barrel, a fixing claw is arranged in the syringe fixing barrel, and the outer side of the fixing claw is connected to the wall surface of the syringe fixing barrel; a fixing flange is arranged on the outer side of the top of the syringe barrel of the syringe, and the fixing flange is clamped in the syringe fixing barrel and is positioned below the fixing claw; when the fixing flange of the syringe barrel is clamped, the fixing claw is turned downwards around the fixing part on the outer side, so that the fixing flange is clamped; the bottom of the syringe fixing barrel is in contact with the top of the spring;
the lower part of the inner sleeve body for mounting the inner sleeve is provided with a backstop window; when the needle head protection device is in a starting state, the backstop elastic sheet is buckled into the backstop window;
the wall surface of the inner sleeve body of the mounting inner sleeve is also provided with a guide window, and the guide pin is clamped in the guide window, so that the protective outer sleeve can only move relative to the mounting inner sleeve along the guide window;
the spring is positioned on the outer wall of the inner sleeve body and positioned between the spring mounting platform and the syringe fixing barrel;
when the needle head protection device is in an unactivated state, the needle head of the injector extends out of the bottom of the protective sleeve;
after the needle head protection device is started, the needle head of the injector is completely positioned in the protection outer sleeve.
As a further improvement of the invention, the guide window consists of 3 parts of groove bodies, namely a retention groove before excitation, a spring excitation chute, a spring release guide groove and 3 parts of groove bodies which are connected end to form a 7 shape;
when the needle head protection device is in an unactivated state, the spring is in a compressed state, and the guide pin is positioned at the bottom of the pre-excitation retention groove;
when the needle head protection device is started, the guide pin enters the spring release guide groove from the pre-excitation retention groove along the spring excitation inclined groove, the guide pin moves along the spring release guide groove under the action of the spring release elasticity, and the outer protection sleeve and the inner installation sleeve move relatively;
and after the needle head protection device is started, the guide pin is positioned at the bottom of the spring release guide groove.
As a further improvement of the invention, the outer side of the upper part of the protective outer sleeve is provided with a handle wing panel.
Furthermore, a plurality of anti-slip strips are arranged at the bottom of the handle wing plate.
As a further improvement of the invention, the bottom of the protective outer sleeve is provided with a protective sheet, the protective sheet is formed by a plurality of arc-shaped sheets which are spaced from each other in a surrounding manner, and the protective sheet is gathered towards the center to shrink, so that the inner diameter of the bottom of the protective outer sleeve formed by the protective sheet is smaller than the inner diameter of the outer sleeve body;
when the needle head protection device is in an unactivated state, the needle head of the syringe extends out of the bottom of the protection sheet;
and after the needle head protection device is started, the needle head of the syringe is completely positioned above the bottom horizontal plane of the protection sheet.
As a further improvement of the invention, more than 2 fixing claws are arranged along the inner wall of the syringe fixing barrel; the upper surface of the fixed claw is provided with a guide inclined plane.
As a further improvement of the invention, the upper part of the inner sleeve body of the mounting inner sleeve is provided with a storage window, and the bottom of the storage window is provided with an inclined plane which inclines outwards;
when the needle head protection device is in an unactivated state, the retaining elastic sheet is buckled into the storage window, and the outer portion of the retaining elastic sheet is lower than the outer wall surface of the outer sleeve body of the protective sleeve.
Furthermore, a storage barrier strip is arranged in the storage window, and the outermost side of the storage barrier strip is lower than the outer diameter of the inner sleeve body;
when the syringe needle protection device is in an unactivated state, the backstop elastic sheet is propped against the outer surface of the storage barrier strip.
As a further improvement of the invention, the bottom of the mounting inner sleeve is provided with a needle head sleeve check sheet which is an elastic piece, and the number of the needle head sleeve check sheets is more than 2; the bottom of the needle head sleeve anti-return sheet is in a free state and gathers to the center to shrink;
the diameter of a concentric circle where the bottom of the needle head sleeve backstop sheet is located is smaller than the outer diameter of the top of the needle head sleeve.
Furthermore, the outer wall of the needle head sleeve backstop sheet is provided with a backstop bulge.
As a further improvement of the invention, the bottom of the inner sleeve body is provided with a guide elastic sheet, two sides of the guide elastic sheet are provided with open slots, and the bottom plate of the guide elastic sheet is an open end and can be elastically bent inwards along the open slots at the two sides.
Furthermore, the guide elastic sheet and the spring release guide groove are in the same vertical direction, and the open grooves on two sides of the guide elastic sheet extend upwards to the upper part of the bottom of the spring release guide groove.
As a further improvement of the invention, the upper part of the protective outer sleeve is provided with a spring mounting cylinder, and the bottom of the spring mounting cylinder is provided with the spring mounting platform; the inner diameter of the spring installation cylinder is larger than that of the outer sleeve cylinder, and the bottom of the spring is installed in the spring installation cylinder.
The safety syringe with the needle head protection device adopts the outer protection sleeve and the inner installation sleeve which are made of plastics, and the materials have certain elasticity and toughness and are convenient to assemble.
Compared with the existing safety syringe, the safety syringe with the needle head protection device has the advantages of simple structure, easy production and assembly and capability of effectively protecting the needle head part of the syringe.
Drawings
FIG. 1 is an exploded view of a component of the present invention;
FIG. 2 is a schematic view of the construction of the protective outer cover of the present invention 1;
FIG. 3 is a schematic view of the construction of the protective outer cover of the present invention 2;
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 a schematic structural view of a syringe barrel of the present invention;
FIG. 7 is a schematic view of the needle guard of the present invention;
FIG. 8 is a cross-sectional view of the needle guard of the present invention;
FIG. 9 is a schematic view in partial cross-section of the needle tip protector of the present invention;
FIG. 10 is a schematic view showing the overall construction of the safety syringe of the present invention;
FIG. 11 is a cross-sectional view of the safety syringe of the present invention;
FIG. 12 is a schematic view of the safety syringe of the present invention in use;
FIG. 13 is a sectional view showing a state in which the safety syringe of the present invention is used;
FIG. 14 is a schematic illustration of the protective sheath release process of the present invention;
FIG. 15 is a schematic view of the present invention with the protective sheath released;
FIG. 16 is a schematic view, partially in section, of the release process of the protective sheath of the present invention, FIG. 1;
FIG. 17 is a schematic view, partially in section, of the release process of the protective sheath of the present invention, FIG. 2;
FIG. 18 is a partial cutaway view of the protective sheath of the present invention shown after release;
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;
an outer sleeve body 11, a spring mounting cylinder 12; handle tabs 13, cleats 131;
a protective sheet 14, a backstop elastic sheet 15 and a guide pin 16;
an inner sleeve body 21, a syringe fixing cylinder 22, a fixing claw 221;
a needle cover retaining piece 23, a retaining bulge 231; a backstop window 24, a storage window 25, and a storage barrier 251;
a guide window 26, a pre-excitation retention groove 261, a spring excitation inclined groove 262, a spring release guide groove 263; a guide spring piece 264;
a fixing flange 41; a piston rod bore 42.
Detailed Description
The invention is further described below with reference to the following figures and specific examples.
As shown in fig. 1, a safety syringe includes a needle guard, and a disposable syringe; the needle head protection device comprises a protection outer sleeve 1, a mounting inner sleeve 2 and a spring 3; the disposable syringe is similar to a conventional syringe and comprises a syringe barrel 4, a piston rod 5, a needle 6 and a needle cover 7.
The structure of the protective outer sleeve 1 is shown in fig. 2 and 3, the protective outer sleeve 1 is provided with an outer sleeve body 11, a hollow cavity is arranged inside the outer sleeve body 11, and the mounting inner sleeve 2 is accommodated in the hollow cavity; a spring mounting cylinder 12 is arranged at the upper part of the protective outer sleeve 1, the inner diameter of the spring mounting cylinder 12 is larger than that of the outer sleeve body 11, and the spring mounting cylinder 12 is used for mounting and storing the spring 3; the outer side of the upper part of the protective outer sleeve 1 is provided with a handle wing piece 13 for being held by fingers of an operator, and the bottom of the handle wing piece 13 is provided with a plurality of anti-slip strips 131 for increasing holding friction force; the bottom of protective sheath 1 is equipped with protection piece 14, protection piece 14 is surrounded by a plurality of arc pieces of mutual interval and is constituteed, protection piece 14 gathers together to the center and contracts, makes the protective sheath 1 bottom by the internal diameter that protection piece 14 constitutes is less than the internal diameter of outer cover barrel 11.
The upper part of the outer sleeve body 11 is provided with a backstop elastic sheet 15, and the top of the backstop elastic sheet 15 is a free end and inclines inwards; the top inner side of the backstop elastic sheet 15 is positioned in the inner wall section of the outer sleeve body 11 in a free state. The number of the backstop elastic sheets 15 is 2, and the backstop elastic sheets are symmetrically arranged on two sides of the outer sleeve body 11.
A raised guide pin 16 is provided on the inner side of the upper part of the outer sleeve body 11.
The structure of the mounting inner sleeve 2 is as shown in fig. 4 and 5, the mounting inner sleeve 2 is provided with an inner sleeve body 21, the inner part of the inner sleeve body 21 is a hollow chamber, and the hollow chamber is used for accommodating the syringe barrel 4; the outer side of the inner sleeve body 21 is sleeved in the outer sleeve body 11 of the protective outer sleeve 1; the top of the mounting inner sleeve 2 is provided with a syringe fixing barrel 22, and the syringe fixing barrel 22 is internally provided with a fixing claw 221 for fixing a fixing flange 41 (shown in fig. 6) of the syringe barrel 4; in order to facilitate the clamping of the fixing flange 41, the upper surface of the fixing claw 221 is provided with an inclined surface, and the outer side of the fixing claw 221 is connected to the wall surface of the syringe fixing cylinder 22; when the fixing flange 41 is engaged, the fixing claw 221 is turned downward around the outer fixing portion, so that the fixing flange 41 is smoothly engaged.
The bottom of the installation inner sleeve 2 is provided with a needle head sleeve check sheet 23, the needle head sleeve check sheet 23 is an elastic piece, and the bottom of the needle head sleeve check sheet 23 is in a free state and gathers to the center to shrink; in the free state, the bottom inside diameter of the needle cover retaining tab 23 is smaller than the top outside diameter of the needle cover 7.
The lower part of the inner sleeve body 21 of the installation inner sleeve 2 is provided with a stopping window 24, the stopping elastic sheet 15 is buckled into the stopping window 24, the top of the stopping elastic sheet 15 is propped against the top of the inner side of the stopping window 24, and the protection outer sleeve 1 cannot move upwards along the installation inner sleeve 2 any more.
Further, the upper part of the inner sleeve body 21 for mounting the inner sleeve 2 is provided with a storage window 25, and the bottom of the storage window 25 is provided with an inclined plane which inclines outwards. Still further, a storage barrier 251 is arranged in the storage window 25, and the outermost side of the storage barrier 251 is lower than the outer diameter of the inner sleeve body 21.
The wall surface of the inner sleeve body 21 of the mounting inner sleeve 2 is further provided with a guide window 26, and the guide pin 16 is clamped in the guide window 26, so that the protection outer sleeve 1 can only move relative to the mounting inner sleeve 2 along the guide window 26.
Further, the guide window 26 is composed of 3 parts of groove bodies, namely a pre-excitation retention groove 261, a spring excitation inclined groove 262, a spring release guide groove 263, and the 3 parts of groove bodies are connected end to form a 7 shape.
Furthermore, a guide elastic sheet 264 is arranged at the bottom of the inner sleeve body 21, open slots are formed in two sides of the guide elastic sheet 264, and a bottom plate of the guide elastic sheet 264 is an open end and can be elastically bent inwards along the open slots on the two sides; the guide elastic sheet 264 and the spring release guide groove 263 are in the same vertical direction, and open grooves at two sides of the guide elastic sheet 264 extend upwards to the upper part of the bottom of the spring release guide groove 263; when the protective outer sleeve 1 is mounted on the mounting inner sleeve 2, the guide pin 16 moves upward along the guide elastic sheet 264, and presses the guide elastic sheet 264 to contract inward, so that the guide pin 16 conveniently passes over the guide elastic sheet 264 and enters the spring release guide groove 263 to complete the primary assembly.
As shown in fig. 7 to 9, the needle protector according to the present invention is composed of the outer protective sleeve 1, the inner mounting sleeve 2, and the spring 3 assembled together, before use, the spring 3 is in a compressed state, i.e. the top of the spring mounting cylinder 12 is close to the bottom of the syringe fixing cylinder 22; at this time, the retaining elastic sheet 15 is buckled into the storage window 25, so that the buckled outermost part of the retaining elastic sheet 15 is smaller than the outer wall of the outer sleeve body 11, and the retaining elastic sheet 15 is in a safe state, thereby preventing the retaining elastic sheet from being collided and damaged and influencing normal use; meanwhile, the inner side of the retaining elastic sheet 15 abuts against the storage barrier strip 251, so that the retaining elastic sheet 15 is prevented from being pressed by external force and being rapidly folded inwards to be further broken; meanwhile, the guide pin 16 is positioned in the pre-excitation retention groove 261, and the spring 3 is in a compressed state, so that the guide pin 16 is pressed against the bottom of the pre-excitation retention groove 261, and the needle protection device of the present invention is maintained in a pre-excitation state.
As shown in fig. 10 and 11, in the disposable syringe, the piston rod 5 is inserted into the piston rod hole 42 of the syringe barrel 4, and the medicine is pre-filled therein; the tail end of the syringe barrel 4 is provided with a needle 6, and a needle cover 7 is sleeved outside the needle 6; the whole body is inserted from the top to the bottom from the hole of the inner sleeve body 21 of the mounting inner sleeve 2, so that the fixing flange 41 of the syringe barrel 4 is clamped into the syringe fixing barrel 22 by the fixing claws 221, and the safety syringe of the invention is formed.
As shown in figure 12, the safety syringe of the present invention is used by removing the needle cover 7 and retracting the needle cover retaining tab 23 inwardly to prevent the needle cover 7 from being inserted to shield the needle 6; the needle 6 is exposed to the outside, and injection operation can be carried out. At this time, the piston rod 5 is pushed to perform injection as in a conventional disposable syringe.
The outer wall of the needle cover retaining sheet 23 is also provided with a retaining projection 231, which further prevents the possibility of inserting the needle cover 7 back.
When the piston rod 5 is pushed to the bottom of the syringe barrel 4, as shown in fig. 13, the injection is completed; at this time, the force is continuously applied, the protective outer sleeve 1 and the piston rod 5 relatively move under the action of the finger driving the handle wing 13, the spring 3 is further compressed, and at this time, the guide pin 16 is also taken away from the bottom of the pre-excitation retention slot 261 and moves towards the spring excitation inclined slot 262; the spring biased chute 262 is a chute so that the guide pin 16 slides along the upper slope of the spring biased chute 262 from the pre-energized retention slot 261 to above the spring release channel 263.
Subsequently, the operator removes his hand, so that the protective outer sleeve 1 starts to be released under the action of the spring 3, at this time, the guide pin 16 starts to slide along the spring release guide groove 263, and the retaining elastic piece 15 slides out of the storage window 25 along the inclined plane at the bottom of the storage window 25; as shown in fig. 14.
When the guide pin 16 slides to the bottom of the spring release guide groove 263, the anti-return elastic sheet 15 is clamped in the anti-return window 24, as shown in fig. 15, the spring 3 is released, and the bottom of the protection sheet 14 of the protective outer sleeve 1 exceeds the bottom of the needle 6, so as to protect the needle 6; at this time, the retaining elastic sheet 15 is clamped into the retaining window 24, so that the protective outer sleeve 1 cannot move upwards and the needle 6 cannot be exposed, and a due protective effect is achieved.
The motion state of the guide pin 16 is schematically shown in fig. 9, 16-18.
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 (13)
1. The safety syringe with the needle head protection device is characterized by comprising a syringe needle head protection device and a syringe;
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 fixed flange; a piston rod is inserted in the syringe barrel; the bottom of the syringe barrel is provided with a needle head; a removable needle cover is arranged outside the needle;
the syringe needle protecting device comprises an outer protecting sleeve, an inner mounting sleeve and a spring; the outer wall of the mounting inner sleeve is sleeved with the spring and is arranged in the protective outer sleeve to form the syringe needle protecting device; the syringe is arranged in the needle head protection device;
the protective outer sleeve is provided with an outer sleeve body, the inner part of the outer sleeve body is a hollow cavity, and the inner cavity is used for accommodating the mounting inner sleeve; the top of the outer sleeve body is provided with a spring mounting table; the spring is arranged on a spring mounting table above the outer sleeve body;
the upper part of the outer sleeve body is provided with a backstop elastic sheet, and the top of the backstop elastic sheet is a free end and inclines inwards; the inner side of the top of the backstop elastic sheet is positioned in the section of the inner wall of the outer sleeve barrel in a free state;
a raised guide pin is arranged on the inner side of the upper part of the outer sleeve body;
an inner sleeve body is sleeved in the mounting inner sleeve body, a hollow cavity is formed inside the inner sleeve body, and an injector is accommodated in the hollow cavity; the outer side of the inner sleeve body is sleeved in the outer sleeve body of the protective outer sleeve; the top of the mounting inner sleeve is provided with a syringe fixing barrel, a fixing claw is arranged in the syringe fixing barrel, and the outer side of the fixing claw is connected to the wall surface of the syringe fixing barrel; a fixing flange is arranged on the outer side of the top of the syringe barrel of the syringe, and the fixing flange is clamped in the syringe fixing barrel and is positioned below the fixing claw; when the fixing flange of the syringe barrel is clamped, the fixing claw is turned downwards around the fixing part on the outer side, so that the fixing flange is clamped; the bottom of the syringe fixing barrel is in contact with the top of the spring;
the lower part of the inner sleeve body for mounting the inner sleeve is provided with a backstop window; when the needle head protection device is in a starting state, the backstop elastic sheet is buckled into the backstop window;
the wall surface of the inner sleeve body of the mounting inner sleeve is also provided with a guide window, and the guide pin is clamped in the guide window, so that the protective outer sleeve can only move relative to the mounting inner sleeve along the guide window;
the spring is positioned on the outer wall of the inner sleeve body and positioned between the spring mounting platform and the syringe fixing barrel;
when the needle head protection device is in an unactivated state, the needle head of the injector extends out of the bottom of the protective sleeve;
after the needle head protection device is started, the needle head of the injector is completely positioned in the protection outer sleeve.
2. The safety syringe with needle head protection device according to claim 1, characterized in that the guiding window is composed of 3 parts of groove bodies, namely a pre-excitation retention groove, a spring excitation chute and a spring release guide groove, wherein the 3 parts of groove bodies are connected end to form a 7 shape;
when the needle head protection device is in an unactivated state, the spring is in a compressed state, and the guide pin is positioned at the bottom of the pre-excitation retention groove;
when the needle head protection device is started, the guide pin enters the spring release guide groove from the pre-excitation retention groove along the spring excitation inclined groove, the guide pin moves along the spring release guide groove under the action of the spring release elasticity, and the outer protection sleeve and the inner installation sleeve move relatively;
and after the needle head protection device is started, the guide pin is positioned at the bottom of the spring release guide groove.
3. A safety syringe with needle protector according to claim 1, characterized by the fact that the upper outer side of the protective sheath is provided with a handle flap.
4. A safety syringe with needle protector according to claim 3, characterized by several anti-slip strips at the bottom of the handle wings.
5. The safety syringe with needle protector according to claim 1, characterized in that the bottom of the protective sleeve is provided with a protective sheet, the protective sheet is surrounded by a plurality of arc-shaped sheets which are spaced from each other, the protective sheet is gathered to the center and contracted, so that the inner diameter of the bottom of the protective sleeve formed by the protective sheet is smaller than the inner diameter of the outer sleeve body;
when the needle head protection device is in an unactivated state, the needle head of the syringe extends out of the bottom of the protection sheet;
and after the needle head protection device is started, the needle head of the syringe is completely positioned above the bottom horizontal plane of the protection sheet.
6. The safety syringe with needle protector according to claim 1, characterized in that the number of the fixing claws is more than 2 along the inner wall of the syringe fixing barrel; the upper surface of the fixed claw is provided with a guide inclined plane.
7. The safety syringe with needle protector as claimed in claim 1, characterized in that the upper part of the inner sleeve body of the mounting inner sleeve is provided with a storage window, and the bottom of the storage window is provided with an outward inclined plane;
when the needle head protection device is in an unactivated state, the retaining elastic sheet is buckled into the storage window, and the outer portion of the retaining elastic sheet is lower than the outer wall surface of the outer sleeve body of the protective sleeve.
8. A safety syringe with needle protector according to claim 7, characterized in that a storage barrier is arranged in the storage window, the outermost side of the storage barrier is lower than the outer diameter of the inner sleeve body;
when the syringe needle protection device is in an unactivated state, the backstop elastic sheet is propped against the outer surface of the storage barrier strip.
9. The safety syringe with needle protector as claimed in claim 1, wherein the bottom of the installation inner sleeve is provided with needle cover anti-return sheets, the needle cover anti-return sheets are elastic pieces, and the number of the needle cover anti-return sheets is more than 2; the bottom of the needle head sleeve anti-return sheet is in a free state and gathers to the center to shrink;
the diameter of a concentric circle where the bottom of the needle head sleeve backstop sheet is located is smaller than the outer diameter of the top of the needle head sleeve.
10. A safety syringe with needle protector according to claim 9, characterized in that the needle cover retaining tab is provided with a retaining projection on the outer wall.
11. The safety syringe with needle protector as claimed in claim 1, wherein the inner sleeve has guide elastic sheet at its bottom, and the guide elastic sheet has open slots at its two sides and open bottom capable of bending elastically inwards.
12. The safety syringe with needle protector according to claim 11, characterized in that the guiding spring is in the same vertical direction with the spring releasing guide groove, and the open grooves at both sides of the guiding spring extend upward to the upper part of the bottom of the spring releasing guide groove.
13. The safety syringe with needle protector of claim 1, characterized in that the spring mounting cylinder is arranged on the upper part of the protective casing, and the spring mounting table is arranged on the bottom of the spring mounting cylinder; the inner diameter of the spring installation cylinder is larger than that of the outer sleeve cylinder, and the bottom of the spring is installed in the spring installation cylinder.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010947075.6A CN111888581A (en) | 2020-09-10 | 2020-09-10 | Safety syringe with needle protector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010947075.6A CN111888581A (en) | 2020-09-10 | 2020-09-10 | Safety syringe with needle protector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111888581A true CN111888581A (en) | 2020-11-06 |
Family
ID=73226050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010947075.6A Withdrawn CN111888581A (en) | 2020-09-10 | 2020-09-10 | Safety syringe with needle protector |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111888581A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023284843A1 (en) * | 2021-07-15 | 2023-01-19 | 贝普医疗科技股份有限公司 | Disposable syringe with low residue that is capable of preventing needle sticks |
| CN115957399A (en) * | 2023-03-16 | 2023-04-14 | 杭州钱唐隆腾医疗技术有限公司 | Safety device for syringe |
| WO2024021807A1 (en) * | 2022-07-29 | 2024-02-01 | 苏州嘉树医疗科技有限公司 | Anti-loosening fixing structure suitable for flange-tap bottle body |
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| CN115957399A (en) * | 2023-03-16 | 2023-04-14 | 杭州钱唐隆腾医疗技术有限公司 | Safety device for syringe |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WW01 | Invention patent application withdrawn after publication | ||
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Application publication date: 20201106 |