CN113018589B - Disposable injector for preventing puncture - Google Patents

Disposable injector for preventing puncture Download PDF

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Publication number
CN113018589B
CN113018589B CN202110191665.5A CN202110191665A CN113018589B CN 113018589 B CN113018589 B CN 113018589B CN 202110191665 A CN202110191665 A CN 202110191665A CN 113018589 B CN113018589 B CN 113018589B
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CN
China
Prior art keywords
section
head
shell
rod
pipe
Prior art date
Legal status (The legal status 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 status listed.)
Active
Application number
CN202110191665.5A
Other languages
Chinese (zh)
Other versions
CN113018589A (en
Inventor
吕玉珍
赵芳
刘树利
朱光丽
李婷
宋文月
孙聚霞
董建军
王娟
张艳萍
石占荣
杨慧
王静静
张玉婷
田可可
王玮
马宇洁
邱承倩
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Jiaozuo Maternal And Child Health Hospital Jiaozuo Women's And Children's Hospital
Original Assignee
Jiaozuo Maternal And Child Health Hospital Jiaozuo Women's And Children's Hospital
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Filing date
Publication date
Application filed by Jiaozuo Maternal And Child Health Hospital Jiaozuo Women's And Children's Hospital filed Critical Jiaozuo Maternal And Child Health Hospital Jiaozuo Women's And Children's Hospital
Priority to CN202110191665.5A priority Critical patent/CN113018589B/en
Publication of CN113018589A publication Critical patent/CN113018589A/en
Application granted granted Critical
Publication of CN113018589B publication Critical patent/CN113018589B/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
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3205—Apparatus for removing or disposing of used needles or syringes, e.g. containers; Means for protection against accidental injuries from used needles
    • A61M5/321—Means for protection against accidental injuries by used needles
    • A61M5/3243—Means for protection against accidental injuries by used needles being axially-extensible, e.g. protective sleeves coaxially slidable on the syringe barrel
    • A61M5/3245—Constructional features thereof, e.g. to improve manipulation or functioning

Abstract

The invention provides a stab-resistant disposable syringe, comprising: the device comprises a piston, a spring, a shell, an inner liner tube, an inner sleeve tube and a needle; wherein the inner bile duct is made of glass material; the inner sleeve is sleeved in the shell, the inner liner pipe part is sleeved in the inner sleeve, and the inner liner pipe is positioned in the middle position between the shell and the inner sleeve; the spring is arranged between the head of the shell and the head of the inner sleeve; the tail end of the inner bile duct is fixed with a needle; the tail end of the piston penetrates into the inner bile duct from the head of the shell. The puncture-preventing disposable injector has the characteristics of simplicity in operation, safety in use and the like, and can be widely applied to the medical field.

Description

Disposable injector for preventing puncture
Technical Field
The invention relates to the technical field of syringes, in particular to a puncture-proof disposable syringe.
Background
In hospitals or clinics, after disposable syringes are used, the syringes and needles need to be handled together in order to prevent and isolate infection. In separating the syringe from the needle, the needle is prone to stabbing the healthcare worker, resulting in injury, even infection or infection to the healthcare worker. At present, many medical researchers also aim at solving the problems, and some patents on puncture-preventing syringes are also filed; however, these patents are not applied to manufacturing and are widely popularized due to limitations of materials and the like. Moreover, even such syringes that have been manufactured have many problems such as complicated use, and therefore have not been widely used.
As can be seen, in the prior art, there is no single-use, stab-resistant syringe that is simple to operate and safe to use.
Disclosure of Invention
Accordingly, the primary object of the present invention is to provide a disposable injector that is easy to operate and safe to use.
In order to achieve the above purpose, the technical scheme provided by the invention is as follows:
a stab-resistant disposable syringe comprising: the device comprises a piston, a spring, a shell, an inner liner tube, an inner sleeve tube and a needle; wherein the inner bile duct is made of glass material;
the inner sleeve is sleeved in the shell, the inner liner pipe part is sleeved in the inner sleeve, and the inner liner pipe is positioned in the middle position between the shell and the inner sleeve; the spring is arranged between the head of the shell and the head of the inner sleeve; the tail end of the inner bile duct is fixed with a needle; the tail end of the piston penetrates into the inner bile duct from the head of the shell.
The piston includes: piston cap, piston rod, piston sleeve; wherein the piston sleeve is made of rubber material;
the piston rod is a five-section type integrated structure, and from the head end to the tail end of the piston rod, the piston rod is sequentially divided into: the first section of rod, the second section of rod, the third section of rod, the fourth section of rod and the fifth section of rod, the tail end of the first section of rod is connected with the head end of the second section of rod, the tail end of the second section of rod is connected with the head end of the third section of rod, the tail end of the third section of rod is connected with the tail end of the fourth section of rod, the tail end of the fourth section of rod is connected with the head end of the fifth section of rod, the head end of the first section of rod is used as the head end of a piston rod, and the tail end of the fifth section of rod is used as the tail end of the piston rod; in addition, the diameter of the first section rod, the diameter of the second section rod, the diameter of the third section rod and the diameter of the fourth section rod are gradually reduced along the direction from the head end to the tail end of the piston rod, the diameter of the fifth section rod is larger than the diameter of the fourth section rod, and the diameter of the fifth section rod is smaller than the diameter of the third section rod; the fifth section has a axial length substantially less than the first section, the second section, the third section, and the fourth section;
the piston cap is fixedly sleeved on the head end of the piston rod, and the piston sleeve is sleeved on the fourth section of rod and the fifth section of rod; the inner cross section of the piston sleeve is a T-shaped cavity, the part with the large diameter accommodates the fifth section of rod, and the part with the small diameter accommodates the fourth section of rod; the outer circumference of the piston sleeve is provided with waves, and the outer tail end of the piston sleeve is provided with an arrow;
and the third section of rod is also provided with 1 transverse through hole, and the axial direction of the transverse through hole is vertical to the axial direction of the third section of rod.
The inner sleeve comprises: a tube body, a tube umbrella and a tube body interface; the pipe umbrella is fixed at the head end of the pipe body, the tail end of the pipe body is also provided with a pipe body interface, and the pipe body interface are of an integrated structure; the diameter of the pipe body interface is smaller than the diameter of the pipe body.
The lower part of the pipe body is uniformly distributed with 3 long and narrow long holes along the axial direction, and each long hole is axially formed along the pipe body.
The pipe umbrella includes: 2 first umbrella sheets and 2 second umbrella sheets; the first umbrella sheet is provided with an arc-shaped T-shaped structure, and the head end of the first umbrella sheet is wide and the tail end of the first umbrella sheet is narrow; the second umbrella sheet is of an arc ladder-shaped structure, the head end of the second umbrella sheet is wide, the tail end of the second umbrella sheet is narrow, and 1 spike is respectively arranged on two sides of the head end of the second umbrella sheet; the inner sides of the tail ends of the 2 first umbrella sheets and the inner sides of the tail ends of the 2 second umbrella sheets are uniformly fixed on the outer side of the head end of the pipe body at intervals along the circumferential direction of the pipe body, the 2 first umbrella sheets are symmetrically arranged, and the 2 second umbrella sheets are also symmetrically arranged; the head ends of the 2 first umbrella sheets and the head ends of the 2 second umbrella sheets are free ends along the axial direction of the pipe body.
The housing includes: the shell head, the first section of shell pipe, the second section of shell pipe and the connector; wherein the shell head, the first section of shell pipe and the second section of shell pipe are of a three-section integrated structure, and the connector is a split part; the shell head is a tubular structure provided with a T-shaped through hole, and 4 first clamping pieces, 2 second clamping pieces and 2 third clamping pieces are further arranged in the shell head.
The shell head free end is used as the shell head end, one end of the connector is inserted into the free end of the second shell pipe section, and the other end of the connector is used as the shell tail end; the outer diameter of the shell head is larger than that of the first section of shell pipe and that of the second section of shell pipe, the outer diameter of the first section of shell pipe is the same as that of the second section of shell pipe, and the inner diameter of the first section of shell pipe is smaller than that of the second section of shell pipe; the inner diameter of the bottom end of the through hole in the shell head is the same as that of the first section of shell pipe, and the inner diameter of the bottom end of the through hole in the shell head is smaller than that of the rest part of the through hole in the shell head.
Along the circumferential direction of the shell head, 4 first clamping pieces are uniformly fixed on the inner side of the bottom end of the shell head; along the circumferential direction of the shell head, 1 second clamping piece or 1 third clamping piece is fixed at the inner side of the bottom end of the shell head at the middle position between every 2 first clamping pieces; and, 4 first screens piece are all symmetrical each other, and 2 second screens piece are symmetrical in opposite directions, and 2 third screens piece are symmetrical in opposite directions.
The connector comprises a connector pipe and a connector edge, wherein the connector pipe is of a horn-shaped tubular structure, and the connector edge is arranged on the opening end face of the connector pipe.
The connector one end is pegged graft in second section shell pipe free end specifically, and the connector is pegged graft in second section shell pipe free end along one end.
The inner diameter of the connector is larger than the outer diameter of the pipe body, and the inner diameter of the connector is smaller than the outer diameter of the pipe umbrella; the first clamping piece is in a hook shape, and one end without a hook part is fixed on the inner side of the bottom end of the shell head.
The side surface, close to the periphery of the shell head, of the second clamping piece is an arc surface, and the side surface, far away from the periphery of the shell head, of the second clamping piece is an inclined side surface; the bottom end surface of the second clamping piece is fixed on the inner side of the bottom end of the shell head.
The third clamping piece comprises a vertical face, and an inward horizontal boss is arranged in the middle of the inner side of the vertical face; the horizontal cross section of the third clamping piece is of a trapezoid structure with an arc, and the bottom end surface of the third clamping piece is fixed on the inner side of the bottom end of the shell head.
The height of the horizontal boss from the inner side of the bottom end of the shell head is the same as the height of the top end of the second clamping piece from the inner side of the bottom end of the shell head; the height of the horizontal boss from the inner side of the bottom end of the shell head, and the height of the top end of the second clamping piece from the inner side of the bottom end of the shell head are smaller than the height of the hook part of the first clamping piece from the inner side of the bottom end of the shell head.
In summary, before the puncture-preventing disposable injector is used, the liquid medicament is pre-filled in the inner bile duct, so that most of the piston is positioned outside the head port of the shell, and the bottom of the piston is positioned in the inner bile duct; the inner sleeve is positioned at the middle front part in the shell, and the spring is compressed between the head of the shell and the head of the inner sleeve; the needle fixed at the tail end of the inner bile duct extends out of the tail end port of the shell. In practical application, the puncture-proof disposable syringe is also provided with a needle cap sleeved on the needle before use. When the needle is pricked into subcutaneous tissue, the head of the piston is pressed by hand, the piston extrudes the liquid medicament in the inner tube towards the tail end of the shell, and the liquid medicament is injected into the subcutaneous tissue by the needle. When the piston head is completely buckled into the head of the shell and cannot be pushed, the injection is completed; then, the piston head is continuously applied with larger force than that when the medicine is pushed, at the moment, the inner sleeve tube is ejected to the outer side of the tail end of the anti-puncture disposable syringe, the head of the inner sleeve tube is clamped at the tail end of the shell, the rest parts of the inner sleeve tube are ejected to the outer side of the tail end of the anti-puncture disposable syringe, and at the moment, the inner sleeve tube wraps the needle head in the inner sleeve tube, so that the needle head is prevented from stabbing medical staff. The puncture-proof disposable syringe of the present invention is also very convenient to operate from the whole process of the above operation.
Drawings
FIG. 1 is a schematic view of the overall composition of the disposable puncture-resistant syringe of the present invention before use.
Fig. 2 is a schematic view showing the overall composition structure of the disposable syringe for preventing puncture wound according to the present invention after use.
Fig. 3 is a schematic view of the composition structure of the piston rod according to the present invention.
Fig. 4 is a schematic view of the composition structure of the piston sleeve according to the present invention.
Fig. 5 is a front view showing the constitution of the inner liner tube according to the present invention.
Fig. 6 is a left side view showing the composition structure of the inner bile duct according to the present invention.
Fig. 7 is a front view of the inner sleeve assembly according to the present invention.
Fig. 8 is a top view of the inner sleeve assembly of the present invention.
Fig. 9 is a front view of the housing assembly structure of the present invention.
Fig. 10 is a left side view of the housing assembly structure of the present invention.
Fig. 11 is a schematic structural view of the connector according to the present invention.
Fig. 12 is a schematic view of the structure of the first positioning element according to the present invention.
Fig. 13 is a schematic view of the structure of the second detent of the present invention.
Fig. 14 is a front view of the third detent assembly according to the present invention.
Fig. 15 is a left side view of the third detent assembly according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and the embodiments, in order to make the objects, technical solutions and advantages of the present invention more apparent.
FIG. 1 is a schematic view of the overall composition of the disposable puncture-resistant syringe of the present invention before use. Fig. 2 is a schematic view showing the overall composition structure of the disposable syringe for preventing puncture wound according to the present invention after use. As shown in fig. 1 and 2, the present invention relates to a puncture-proof disposable syringe comprising: the device comprises a piston 1, a spring 2, a shell 3, an inner liner tube 4, an inner liner tube 5 and a needle 6; wherein the inner liner tube 4 is made of glass material;
the inner sleeve 5 is sleeved in the shell 3, the inner liner pipe 4 is partially sleeved in the inner sleeve 5, and the inner liner pipe 4 is positioned at the middle position inside the shell 3 and the inner sleeve 5; the spring 2 is arranged between the head of the shell 3 and the head of the inner sleeve 5; the tail end of the inner bile duct 4 is fixed with a needle head 6; the tail end of the piston 1 penetrates into the inner bile duct 4 from the head of the shell 3.
In practical application, the piston 1, the shell 3 and the inner sleeve 5 are made of plastic grease, PPT and other materials.
In practical application, the puncture-preventing disposable injector is filled with a certain dose of liquid medicament in advance in the inner bile duct 4 before leaving a factory for use, and the dose of the liquid medicament can be specifically determined according to practical requirements.
In a word, before the disposable injector for preventing puncture is used, as the liquid medicament is pre-filled in the inner bile duct, most of the piston is positioned outside the head port of the shell, and the bottom of the piston is positioned in the inner bile duct; the inner sleeve is positioned at the middle front part in the shell, and the spring is compressed between the head of the shell and the head of the inner sleeve; the needle fixed at the tail end of the inner bile duct extends out of the tail end port of the shell. In practical application, the puncture-proof disposable syringe is also provided with a needle cap sleeved on the needle before use. When the needle is pricked into subcutaneous tissue, the head of the piston is pressed by hand, the piston extrudes the liquid medicament in the inner tube towards the tail end of the shell, and the liquid medicament is injected into the subcutaneous tissue by the needle. When the piston head is completely buckled into the head of the shell and cannot be pushed, the injection is completed; then, the piston head is continuously applied with larger force than that when the medicine is pushed, at the moment, the inner sleeve tube is ejected to the outer side of the tail end of the anti-puncture disposable syringe, the head of the inner sleeve tube is clamped at the tail end of the shell, the rest parts of the inner sleeve tube are ejected to the outer side of the tail end of the anti-puncture disposable syringe, and at the moment, the inner sleeve tube wraps the needle head in the inner sleeve tube, so that the needle head is prevented from stabbing medical staff. The puncture-proof disposable syringe of the present invention is also very convenient to operate from the whole process of the above operation.
Fig. 3 is a schematic view of the composition structure of the piston rod according to the present invention. Fig. 4 is a schematic view of the composition structure of the piston sleeve according to the present invention. As shown in fig. 3 and 4, in the present invention, a piston 1 includes: a piston cap 11, a piston rod and a piston sleeve 13; wherein the piston sleeve 13 is made of rubber material; the piston rod is a five-section type integrated structure, and from the head end to the tail end of the piston rod, the piston rod is sequentially divided into: the first section rod 121, the second section rod 122, the third section rod 123, the fourth section rod 124 and the fifth section rod 125, wherein the tail end of the first section rod 121 is connected with the head end of the second section rod 122, the tail end of the second section rod 122 is connected with the head end of the third section rod 123, the tail end of the third section rod 123 is connected with the tail end of the fourth section rod 124, the tail end of the fourth section rod 124 is connected with the head end of the fifth section rod 125, the head end of the first section rod 121 is used as the head end of a piston rod, and the tail end of the fifth section rod 125 is used as the tail end of the piston rod; moreover, the diameter of the first section bar 121, the diameter of the second section bar 122, the diameter of the third section bar 123, and the diameter of the fourth section bar 124 are gradually reduced in the direction from the head end to the tail end of the piston rod, the diameter of the fifth section bar 125 is larger than the diameter of the fourth section bar 124, and the diameter of the fifth section bar 125 is smaller than the diameter of the third section bar 123; the fifth rod 125 axial length is much less than the first rod 121 axial length, the second rod 122 axial length, the third rod 123 axial length, and the fourth rod 124 axial length.
The piston cap 11 is fixedly sleeved on the head end of the piston rod, and the piston sleeve 13 is sleeved on the fourth section rod 124 and the fifth section rod 125; the inner cross section of the piston sleeve 13 is a T-shaped cavity, the large-diameter part accommodates the fifth-section rod 125, and the small-diameter part accommodates the fourth-section rod 124; the outer circumference of the piston sleeve 13 is provided in a wave shape, and the outer tail end of the piston sleeve 13 is provided in an arrow shape.
The third segment rod 123 is further provided with 1 transverse through hole 126, and the axial direction of the transverse through hole 126 is perpendicular to the axial direction of the third segment rod 123.
In practical application, in the pushing process of the piston 1 in the inner bile duct 4, the piston sleeve 13 has the function of sealing the inner bile duct 4; the lateral through hole 126 has the function of balancing the air pressure outside the piston sleeve 13 to further secure the sealability of the piston sleeve 13.
In practical applications, the piston cap 11 and the piston rod may be in an integral structure, and the piston cap 11 and the piston rod are made of plastic.
Fig. 5 is a front view showing the constitution of the inner liner tube according to the present invention. Fig. 6 is a left side view showing the composition structure of the inner bile duct according to the present invention. As shown in fig. 5 and 6, in the present invention, the inner liner tube 4 has a four-section integrated structure, and sequentially includes, from the head end to the tail end of the inner liner tube 4: a stem plate 41, a lumen segment 42, a first needle fixing segment 43, a second needle fixing segment 44; wherein the tube seat piece 41 is a glass piece with a through hole; the diameter of the through hole on the tube seat piece 41 is the same as the inner diameter of the tube cavity section 42, and the through hole on the tube seat piece 41 corresponds to the inner cavity of the tube cavity section 42;
one end of the tube seat piece 41 is fixedly connected with the head end of the tube cavity section 42, the tail end of the tube cavity section 42 is connected with the head end of the first needle fixing section 43, and the tail end of the first needle fixing section 43 is fixedly connected with the head end of the second needle fixing section 44; the tail end of the tube cavity section 42 is contracted into a hole with the same size as the cross section of the tail end of the needle head 6 for fixing the tail end of the needle head 6, and the tail end of the tube cavity section 42 is communicated with the interior of the needle head 6; the needle head 6 sequentially passes through the first needle fixing section 43 and the second needle fixing section 44, and the needle head 6 passes through the tail end of the second needle fixing section 44, and the head of the needle head 6 is positioned outside the tail end of the bile duct 4.
Fig. 7 is a front view of the inner sleeve assembly according to the present invention. Fig. 8 is a top view of the inner sleeve assembly of the present invention. As shown in fig. 7 and 8, in the present invention, the inner tube 5 includes: a tube body 51, a tube umbrella and a tube body interface 53; wherein, the tube umbrella is fixed at the head end of the tube body 51, the tail end of the tube body 51 is also provided with a tube body interface 53, and the tube body 51 and the tube body interface 53 are of an integrated structure; the diameter of the tube interface 53 is smaller than the diameter of the tube 51; the lower part of the pipe body 51 is uniformly provided with 3 long and narrow long holes 54 along the axial direction, and each long hole 54 is axially opened along the pipe body 51.
The pipe umbrella includes: 2 first umbrella blades 521, 2 second umbrella blades 522; the first umbrella piece 521 is of a T-shaped structure with an arc shape, and the head end of the first umbrella piece 521 is wide and the tail end is narrow; the second umbrella piece 522 is of an arc ladder-shaped structure, the head end of the second umbrella piece 522 is wide, the tail end of the second umbrella piece 522 is narrow, and 1 spike is respectively arranged on two sides of the head end of the second umbrella piece 522; the inner sides of the tail ends of the 2 first umbrella pieces 521 and the inner sides of the tail ends of the 2 second umbrella pieces 522 are uniformly fixed at intervals along the circumferential direction of the pipe body 51 outside the head end of the pipe body 51, the 2 first umbrella pieces 521 are symmetrically arranged, and the 2 second umbrella pieces 522 are also symmetrically arranged; the head ends of the 2 first umbrella blades 521 and the head ends of the 2 second umbrella blades are all free ends along the axial direction of the pipe body 51.
Fig. 9 is a front view of the housing assembly structure of the present invention. Fig. 10 is a left side view of the housing assembly structure of the present invention. Fig. 11 is a schematic structural view of the connector according to the present invention. As shown in fig. 9, 10, and 11, in the present invention, the housing 3 includes: the shell head 31, the first section of shell tube 32, the second section of shell tube 33 and the connector 30; wherein the shell head 31, the first section of shell tube 32 and the second section of shell tube 33 are of a three-section integrated structure, and the connector 30 is a split part; the shell head 31 is a tubular structure with a T-shaped through hole, and 4 first clamping pieces 311, 2 second clamping pieces 312 and 2 third clamping pieces 313 are further arranged in the shell head 31.
The free end of the shell head 31 is used as the head end of the shell 3, one end of the connector 30 is inserted into the free end of the second shell tube 33, and the other end of the connector 30 is used as the tail end of the shell 3; the outer diameter of the shell head 31 is larger than that of the first section shell tube 32 and the second section shell tube 33, the outer diameter of the first section shell tube 32 is the same as that of the second section shell tube 33, and the inner diameter of the first section shell tube 32 is smaller than that of the second section shell tube 33; the inner diameter of the bottom end of the through hole in the shell head 31 is the same as the inner diameter of the first section of shell tube 32, and the inner diameter of the bottom end of the through hole in the shell head 31 is smaller than the inner diameter of the rest part of the through hole in the shell head 31.
Along the circumferential direction of the shell head 31, 4 first clamping pieces 311 are uniformly fixed on the inner side of the bottom end of the shell head 31. Along the circumferential direction of the casing head 31, 1 second detent piece 312 or 1 third detent piece 313 is fixed inside the bottom end of the casing head 31 at an intermediate position between every 2 first detent pieces 311. Moreover, the 4 first clamping members 311 are symmetrical to each other, the 2 second clamping members 312 are symmetrical to each other, and the 2 third clamping members 313 are symmetrical to each other.
The connector 30 comprises a connector tube 301 and a connector edge 302, wherein the connector tube 301 is of a horn-shaped tubular structure, and the connector edge 302 is arranged on the opening end face of the connector tube 301. The inner diameter of the connector 30 is larger than the outer diameter of the tube body 51, and the inner diameter of the connector 30 is smaller than the outer diameter of the tube umbrella.
One end of the connector 30 is inserted into the free end of the second section of casing 33, specifically, one end of the connector edge 302 is inserted into the free end of the second section of casing 33.
Fig. 12 is a schematic view of the structure of the first positioning element according to the present invention. As shown in fig. 12, in the present invention, the first locking member 311 is in a hook shape, and one end without a hook portion is fixed to the inner side of the bottom end of the shell head 31.
Fig. 13 is a schematic view of the structure of the second detent of the present invention. As shown in fig. 13, in the present invention, the side of the second detent member 312 near the outer periphery of the shell head 31 is an arc surface, and the side of the second detent member 312 far from the outer periphery of the shell head 31 is an inclined side; the bottom end surface of the second clamping member 312 is fixed to the inner side of the bottom end of the shell head 31.
Fig. 14 is a front view of the third detent assembly according to the present invention. Fig. 15 is a left side view of the third detent assembly according to the present invention. As shown in fig. 14 and 15, in the present invention, the third detent 313 includes a vertical surface, and an inward horizontal boss 3130 is disposed in the middle of the inner side of the vertical surface; the horizontal cross section of the third clamping member 313 is a trapezoid structure with an arc, and the bottom end surface of the third clamping member 313 is fixed on the inner side of the bottom end of the shell head 31. The height of the horizontal boss 3130 from the inside of the bottom end of the case head 31 is the same as the height of the top end of the second stopper 312 from the inside of the bottom end of the case head 31. The height of the horizontal boss 3130 from the inner side of the bottom end of the shell head 31 and the height of the top end of the second clamping piece 312 from the inner side of the bottom end of the shell head 31 are smaller than the height of the hook part of the first clamping piece 311 from the inner side of the bottom end of the shell head 31.
In summary, before the disposable injector for preventing puncture according to the present invention is used, the tube seat piece 41 of the bile duct 4 pre-filled with the liquid medicine is positioned at the top end of the hook portion of the first clamping piece 311 in the shell head 31; the tube umbrella of the inner sleeve 5 is positioned at the upper part of the first section of shell tube 32, moreover, the first umbrella piece 521 is propped against the inner side of the top end of the second clamping piece 312, the second umbrella piece 522 is propped against the bottom of the horizontal boss 3130 of the third clamping piece 313, and 2 spines at two sides of the top end of the second umbrella piece 522 are respectively positioned at two sides of the horizontal boss 3130. At this time, the spring is in a compressed state between the head space of the inner sleeve and the head of the shell, which are enclosed by the first umbrella piece 521 and the second umbrella piece 522, most of the piston is positioned outside the head port of the shell, and the bottom of the piston is positioned in the inner bile duct; the needle fixed at the tail end of the inner bile duct extends out of the tail end port of the shell. When the injection of the disposable injector for preventing puncture is completed, the inner side of the top end of the piston cap 11 is completely attached to the outer surface of the free end of the tube seat piece 41. Then, a certain force is continuously applied to the outer side of the top end of the piston cap 11, at this time, the tube seat piece 41 is pressed and then falls from the top end of the hook part of the first clamping piece 311 to the outer side of the top end of the second clamping piece 312 and the top of the horizontal boss 3130 of the third clamping piece 313; the external force is continuously transmitted through the fallen tube seat piece 41, and the 2 spines at the two sides of the top ends of the first umbrella piece 521 and the second umbrella piece 522 are simultaneously pressed by the external force; this pressure is superimposed on the elastic force of the compressed spring, which pushes the inner sleeve 5 together to eject towards the tail of the puncture-proof disposable syringe according to the invention. The tube umbrella of the ejected inner tube 5 is positioned on the second section of shell tube 32, the free ends of the first umbrella piece 521 and the second umbrella piece 522 are stretched outwards, and the free ends of the first umbrella piece 521 and the second umbrella piece 522 are propped against the edges between the first section of shell tube 32 and the second section of shell tube 33 because the inner diameter of the first section of shell tube 32 is smaller than the inner diameter of the second section of shell tube 33, and the ejected inner tube 5 cannot reversely enter the first section of shell tube 32. At this time, the spring is in a free state; because the inside diameter of the connector 30 is smaller than the outside diameter of the tube umbrella, the tube umbrella of the inner sleeve 5 is clamped at the tail part of the shell, the rest part of the inner sleeve is ejected out of the tail end of the puncture-proof disposable syringe, and the needle is wrapped inside the inner sleeve, so that the needle is prevented from puncturing medical staff.
In summary, the above embodiments are only preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (2)

1. A stab-resistant disposable syringe, said syringe comprising: the device comprises a piston, a spring, a shell, an inner liner tube, an inner sleeve tube and a needle; wherein the inner bile duct is made of glass material;
the inner sleeve is sleeved in the shell, the inner liner pipe part is sleeved in the inner sleeve, and the inner liner pipe is positioned in the middle position between the shell and the inner sleeve; the spring is arranged between the head of the shell and the head of the inner sleeve; the tail end of the inner bile duct is fixed with a needle; the tail end of the piston penetrates into the inner bile duct from the head part of the shell;
the piston includes: piston cap, piston rod, piston sleeve; wherein the piston sleeve is made of rubber material;
the piston rod is a five-section type integrated structure, and from the head end to the tail end of the piston rod, the piston rod is sequentially divided into: the first section of rod, the second section of rod, the third section of rod, the fourth section of rod and the fifth section of rod, the tail end of the first section of rod is connected with the head end of the second section of rod, the tail end of the second section of rod is connected with the head end of the third section of rod, the tail end of the third section of rod is connected with the tail end of the fourth section of rod, the tail end of the fourth section of rod is connected with the head end of the fifth section of rod, the head end of the first section of rod is used as the head end of a piston rod, and the tail end of the fifth section of rod is used as the tail end of the piston rod; in addition, the diameter of the first section rod, the diameter of the second section rod, the diameter of the third section rod and the diameter of the fourth section rod are gradually reduced along the direction from the head end to the tail end of the piston rod, the diameter of the fifth section rod is larger than the diameter of the fourth section rod, and the diameter of the fifth section rod is smaller than the diameter of the third section rod; the fifth section has a axial length substantially less than the first section, the second section, the third section, and the fourth section;
the piston cap is fixedly sleeved on the head end of the piston rod, and the piston sleeve is sleeved on the fourth section of rod and the fifth section of rod; the inner cross section of the piston sleeve is a T-shaped cavity, the part with the large diameter accommodates the fifth section of rod, and the part with the small diameter accommodates the fourth section of rod; the outer circumference of the piston sleeve is provided with waves, and the outer tail end of the piston sleeve is provided with an arrow;
the third section of rod is also provided with 1 transverse through hole, and the axial direction of the transverse through hole is vertical to the axial direction of the third section of rod;
the inner sleeve comprises: a tube body, a tube umbrella and a tube body interface; the pipe umbrella is fixed at the head end of the pipe body, the tail end of the pipe body is also provided with a pipe body interface, and the pipe body interface are of an integrated structure; the diameter of the pipe body interface is smaller than that of the pipe body;
the lower part of the pipe body is uniformly provided with 3 long and narrow long holes along the axial direction, and each long hole is axially formed along the pipe body;
the pipe umbrella includes: 2 first umbrella sheets and 2 second umbrella sheets; the first umbrella sheet is provided with an arc-shaped T-shaped structure, and the head end of the first umbrella sheet is wide and the tail end of the first umbrella sheet is narrow; the second umbrella sheet is of an arc ladder-shaped structure, the head end of the second umbrella sheet is wide, the tail end of the second umbrella sheet is narrow, and 1 spike is respectively arranged on two sides of the head end of the second umbrella sheet; the inner sides of the tail ends of the 2 first umbrella sheets and the inner sides of the tail ends of the 2 second umbrella sheets are uniformly fixed on the outer side of the head end of the pipe body at intervals along the circumferential direction of the pipe body, the 2 first umbrella sheets are symmetrically arranged, and the 2 second umbrella sheets are also symmetrically arranged; the head ends of the 2 first umbrella sheets and the head ends of the 2 second umbrella sheets are free ends along the axial direction of the pipe body;
the housing includes: the shell head, the first section of shell pipe, the second section of shell pipe and the connector; wherein the shell head, the first section of shell pipe and the second section of shell pipe are of a three-section integrated structure, and the connector is a split part; the shell head is of a tubular structure provided with a T-shaped through hole, and is internally provided with 4 first clamping pieces, 2 second clamping pieces and 2 third clamping pieces;
the shell head free end is used as the shell head end, one end of the connector is inserted into the free end of the second shell pipe section, and the other end of the connector is used as the shell tail end; the outer diameter of the shell head is larger than that of the first section of shell pipe and that of the second section of shell pipe, the outer diameter of the first section of shell pipe is the same as that of the second section of shell pipe, and the inner diameter of the first section of shell pipe is smaller than that of the second section of shell pipe; the inner diameter of the bottom end of the through hole in the shell head is the same as that of the first section of shell pipe, and is smaller than that of the rest part of the through hole in the shell head;
along the circumferential direction of the shell head, 4 first clamping pieces are uniformly fixed on the inner side of the bottom end of the shell head; along the circumferential direction of the shell head, 1 second clamping piece or 1 third clamping piece is fixed at the inner side of the bottom end of the shell head at the middle position between every 2 first clamping pieces; in addition, the 4 first clamping pieces are symmetrical to each other, the 2 second clamping pieces are symmetrical to each other, and the 2 third clamping pieces are symmetrical to each other;
the connector comprises a connector pipe and a connector edge, the connector pipe is of a horn-shaped tubular structure, and the connector edge is arranged on the opening end face of the connector pipe;
one end of the connector is spliced with the free end of the second section of shell pipe, and the connector is spliced in the free end of the second section of shell pipe along one end;
the inner diameter of the connector is larger than the outer diameter of the pipe body, and the inner diameter of the connector is smaller than the outer diameter of the pipe umbrella; the first clamping piece is in a hook shape, and one end without a hook part is fixed on the inner side of the bottom end of the shell head;
the side surface, close to the periphery of the shell head, of the second clamping piece is an arc surface, and the side surface, far away from the periphery of the shell head, of the second clamping piece is an inclined side surface; the bottom end surface of the second clamping piece is fixed on the inner side of the bottom end of the shell head;
the third clamping piece comprises a vertical face, and an inward horizontal boss is arranged in the middle of the inner side of the vertical face; the horizontal cross section of the third clamping piece is of a trapezoid structure with an arc, and the bottom end surface of the third clamping piece is fixed on the inner side of the bottom end of the shell head;
the height of the horizontal boss from the inner side of the bottom end of the shell head is the same as the height of the top end of the second clamping piece from the inner side of the bottom end of the shell head; the height of the horizontal boss from the inner side of the bottom end of the shell head, and the height of the top end of the second clamping piece from the inner side of the bottom end of the shell head are smaller than the height of the hook part of the first clamping piece from the inner side of the bottom end of the shell head.
2. The puncture-resistant disposable syringe according to claim 1, wherein the inner tube has a four-segment integrated structure, and comprises, in order from the head end to the tail end of the inner tube: the device comprises a tube seat piece, a tube cavity section, a first needle fixing section and a second needle fixing section; wherein, the tube seat sheet is a glass sheet with a through hole; the diameter of the through hole on the tube seat sheet is the same as the inner diameter of the tube cavity section, and the through hole on the tube seat sheet corresponds to the inner cavity of the tube cavity section;
one end of the tube seat piece is fixedly connected with the head end of the connecting tube cavity section, the tail end of the tube cavity section is connected with the head end of the first fixed needle section, and the tail end of the first fixed needle section is fixedly connected with the head end of the second fixed needle section;
the tail end of the tube cavity section is contracted into a hole which has the same size as the cross section of the tail end of the needle head and is used for fixing the tail end of the needle head, and the tail end of the tube cavity section is communicated with the interior of the needle head; the needle head sequentially passes through the first needle fixing section and the second needle fixing section, and passes through the tail end of the second needle fixing section, and the head of the needle head is positioned outside the tail end of the inner bile duct.
CN202110191665.5A 2021-02-06 2021-02-06 Disposable injector for preventing puncture Active CN113018589B (en)

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CN113996451B (en) * 2021-11-03 2022-08-26 焦作市妇幼保健院(焦作市妇女儿童医院) Clinical application system for quality control of blood specimen before test

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