CN113332539A - Single infection-preventing type injection needle - Google Patents

Single infection-preventing type injection needle Download PDF

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Publication number
CN113332539A
CN113332539A CN202110592814.9A CN202110592814A CN113332539A CN 113332539 A CN113332539 A CN 113332539A CN 202110592814 A CN202110592814 A CN 202110592814A CN 113332539 A CN113332539 A CN 113332539A
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China
Prior art keywords
needle
cavity
elastic block
block
elastic
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CN202110592814.9A
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Chinese (zh)
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CN113332539B (en
Inventor
吕静平
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First People's Hospital Of Yongkang
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First People's Hospital Of Yongkang
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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
    • A61M5/3278—Apparatus for destroying used needles or 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
    • 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
    • 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
    • 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
    • A61M2005/31516—Piston or piston-rod constructions, e.g. connection of piston with piston-rod reducing dead-space in the syringe barrel after delivery
    • 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
    • A61M5/3278—Apparatus for destroying used needles or syringes
    • A61M2005/328—Apparatus for destroying used needles or syringes having needle tip encapsulating means, e.g. two-component hardenable compound or molten plastic

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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 the technical field of medical instruments, in particular to a single infection-preventing injection needle, which comprises a needle sleeve and a puncture needle; the needle sleeve is characterized in that a conical cavity is arranged at the bottom end of the needle sleeve, a spherical elastic block is clamped in the middle of the conical cavity, a limiting part is arranged on the side wall of the conical cavity, a circulation groove is arranged on the limiting part, a group of circulation holes are formed in the outer surface of the elastic block, a clamping cavity is arranged on the side wall of the conical cavity, the top end of the needle sleeve is connected with a needle cylinder, a piston is connected in the needle cylinder in a sliding manner, the top end of the piston is fixedly connected with a push rod, and the middle of the bottom end of the piston is connected with a pressure rod; according to the invention, through arranging the structure in the needle head, the purpose that the needle head is automatically scrapped after the injection is finished is achieved, the effect of single injection of the needle head is realized, the problems of infection and the like caused by repeated use of the needle head by a patient are reduced, and the safety of the injection needle head in use is improved.

Description

Single infection-preventing type injection needle
Technical Field
The invention relates to the technical field of medical instruments, in particular to a single-time anti-infection injection needle.
Background
Many patients, afflicted with diabetes, require several injections of insulin per day, usually after eating, and therefore require insulin syringes to be carried with them wherever they go, and many different configurations of insulin syringe designs are also currently available.
Some technical solutions related to a needle for injection also appear in the prior art, such as a chinese patent, patent No. 2017113229135, which proposes an insulin injection needle, characterized in that: the device comprises a front-end outer sheath (1) and a rear-end outer sheath (2), wherein a rear sealing plug (3) is arranged in the rear-end outer sheath (2), and a puncture needle head (4) is arranged in the front-end outer sheath (1); the rear end of the front-end outer sheath (1) is connected with the rear outer sheath (2), a front-end sealing piece (5) is arranged inside the front end of the front-end outer sheath (1), the side edge of the front-end sealing piece (5) is fixedly connected with the inner surface of the front end of the front-end outer sheath (1), and the front-end outer sheath (1) is communicated with the rear outer sheath (2); the rear sealing plug (3) is a hollow tube, and the front end of the rear sealing plug (3) is closed and arranged in the rear outer sheath (2). In the technical scheme of this application, thereby block the support through the blood flow and block blood and obtain clear operation field of vision to simple structure blocks effectually.
However, the injection needle in the above technology is often reusable, and many patients often use the same needle repeatedly to save cost, which leads to the patient easily suffering from infection or bad reaction during the injection process.
Therefore, a single infection prevention type injection needle is provided for solving the problems.
Disclosure of Invention
In order to make up the defects of the prior art and solve the problem that the same type of needle is repeatedly used by a patient in order to save cost, so that the patient is easy to have infection or poor reaction in the injection process, the invention provides a single-time anti-infection injection needle.
The technical scheme adopted by the invention for solving the technical problems is as follows: a single infection-proof injection needle comprises a needle sleeve and a puncture needle arranged on the needle sleeve; the needle sleeve is characterized in that a conical cavity with a wide top and a narrow bottom is arranged at the bottom end of the needle sleeve, a spherical elastic block is clamped in the middle of the conical cavity, a limiting part is arranged on the side wall of the conical cavity corresponding to the top end of the elastic block, the elastic block can be pressed against the side wall of the conical cavity by the limiting part, a circulation groove is arranged on the limiting part, a group of circulation holes extending in the vertical direction are formed in the position, close to the outer surface of the side wall of the conical cavity, of the elastic block, a clamping cavity matched with the side wall of the conical cavity in shape is arranged on the side wall of the conical cavity corresponding to the bottom end of the elastic block, when the elastic block is pressed into the clamping cavity, the side wall of the clamping cavity can block ports of the circulation holes, a needle cylinder is connected to the top end of the needle sleeve, a piston is connected to the inside of the needle cylinder in a sliding manner, a push rod is fixedly connected to the top end of the piston, and a compression rod is connected to the middle of the bottom end of the piston; when the injection needle works, the injection needle in the prior art can be reused, and many patients often use the same needle repeatedly in order to save cost, so that the patients are easy to have infection or bad reaction in the injection process; when the injection needle head is used, before insulin is injected, the elastic block is clamped in the conical cavity between the limiting part and the clamping cavity, when the push rod pushes the piston to apply pressure to liquid medicine in the needle cylinder, the liquid medicine can be injected into a patient through the circulation groove, the circulation hole and the puncture needle, when the piston gradually finishes liquid medicine injection and drives the press rod to move to the elastic block, the press rod can extrude and deform the elastic block until the elastic block is pressed into the clamping cavity and tightly clamped with the clamping cavity, the side wall of the clamping cavity can attach and block two ends of the circulation hole, so that the whole conical cavity is blocked under the matching of the elastic block and the clamping cavity, the purpose that the needle head is automatically scrapped after the injection is finished is achieved, the effect of single injection of the needle head is achieved, and the problems of infection and the like caused by the repeated use of the needle head of the patient are solved, the safety of the injection needle in use is improved.
Preferably, a clamping groove is formed in the top end of the needle cylinder, and a clamping block capable of limiting the position of the push rod is clamped in the clamping groove in an interference manner; the during operation, before the cylinder uses, the fixture block of setting can restrict the push rod position, prevents that the push rod from accidentally impressing the elastomer under the interference of external force in the joint chamber, leads to the condition that the syringe needle became invalid, when the cylinder used, extracted the fixture block from the draw-in groove is inside, can make the injection work of syringe needle go on smoothly, improved the validity of syringe needle when using.
Preferably, the bottom end in the needle cylinder is filled with an elastomer, the middle part of the elastomer is provided with a through hole for the pressure rod to pass through, and the side wall of the elastomer is arranged into a wave shape and is attached to the inner wall of the needle cylinder; the during operation, when the piston moves to elastomer department, the piston can extrude the elastomer this moment, and the elastomer can stretch into in the needle cover cavity on spacing portion top when the pressurized to liquid medicine in this cavity plays extruded effect, thereby when not influencing the liquid medicine injection, the liquid medicine that has significantly reduced remains between piston and elastomer, makes injection and use that the liquid medicine can be more abundant, reduces the waste of liquid medicine.
Preferably, the elastic body is a wave-shaped air bag, and the air bag can penetrate through the circulation groove and extend into a cavity formed by the limiting part, the side wall of the conical cavity and the elastic body when being deformed under pressure; the during operation is the form of gasbag through setting up the elastomer, has increased the flexible deformation effect of elastomer for the gasbag is receiving the piston extrusion time, and the gasbag bottom can warp and stretch into in the cavity between spacing portion, toper chamber and the elastomer, thereby can be with the more abundant extrusion of liquid medicine in this cavity, further reduce the waste of liquid medicine.
Preferably, the hard pipe is arranged in the flow hole in an interference manner; during operation, when the elastic block extrudees and deforms under the effect of depression bar and tapered cavity lateral wall, the hard tube can support the flow through hole this moment, reduces the elastomer and leads to the situation that the flow hole contracts inwards and influence the liquid medicine velocity of flow when warping, has improved the stability of liquid medicine when the injection greatly.
Preferably, a sliding groove is formed in the top end of the elastic block, a rigid layer is connected to the inside of the sliding groove in a sliding mode, an elastic piece is connected between the top end of the rigid layer and the end portion of the sliding groove, and when the elastic block is matched with the clamping cavity, the rigid layer is located at the corner positions of the clamping cavity and the conical cavity; during operation, after the elastic block cooperatees with the joint chamber, if stimulate the piston hard and to the toper intracavity portion when bleeding, the elastic block is under the effect of joint chamber both sides atmospheric pressure difference this moment, be easy to be pressed and be out of shape and inhale the condition to joint chamber top again, through setting up the rigidity layer this moment, when the elastic block moves to joint intracavity portion, the rigidity layer moves to the spout top under the effort at joint chamber and toper chamber turning, thereby make the elastic block can impress smoothly in the joint chamber, the rigidity layer resets under the effect of elastic component afterwards, and make the rigidity level locate at the turning position department in joint chamber and toper chamber, the elastic block that joint chamber and toper chamber turning department correspond takes place to warp greatly, thereby reduce the elastic block and inhaled the circumstances that the toper chamber top and reset, automatic condemned effect after the syringe needle injection has further been improved.
Preferably, the middle part of the elastic block is provided with a flow channel, the bottom end of the flow channel is provided with a funnel-shaped cavity with a narrow upper part and a wide lower part, the side wall of the flow channel is connected with a blocking block through a traction rope, the bottom end of the needle sleeve is connected with an ejector rod, and when the elastic block is matched with the clamping cavity, the ejector rod can tightly press the blocking block on the side wall of the funnel-shaped cavity; the during operation, when the elastic block was located joint chamber top, there was the clearance between blocking piece and the funnel shape chamber this moment for the liquid medicine can be followed the opening and flowed out with the circulation synchronization, has improved the injection speed of syringe needle, when the elastic block pressed the joint intracavity portion simultaneously, the ejector pin can be pressed the blocking piece this moment, and make the blocking piece hug closely on funnel-shaped intracavity wall, and can block the funnel shape chamber, thereby reached the effect of syringe needle single injection.
Preferably, a group of cavities are formed in the top end of the elastic block, an air passage communicated with the cavities is formed in the outer surface of the elastic block corresponding to the bottom end of the limiting part, and a sealing film is connected to the outer surface of the elastic block corresponding to the outer end of the air passage; the during operation, when the depression bar extrudeed the elastic block top, the cavity can pass through the air flue with the gas of inside during compressing this moment and impress in the cavity between seal membrane and the elastic block to make the seal membrane can extrude the liquid in the spacing portion bottom cavity and fully flow out when the swell, further reduce the waste of liquid medicine.
The invention has the following beneficial effects:
1. according to the invention, through arranging the structure in the needle head and pressing the elastic block into the clamping cavity when the injection of the needle head is finished, the conical cavity is blocked under the matching of the elastic block and the clamping cavity, so that the purpose of automatically scrapping the needle head after the injection is finished is achieved, the effect of single injection of the needle head is realized, the problems of infection and the like caused by the repeated use of the needle head by a patient are reduced, and the safety of the injection needle head in use is improved.
2. According to the invention, the position of the push rod is limited by the arranged fixture block, so that the situation that the needle head fails due to the fact that the push rod accidentally presses the elastic body into the clamping cavity under the interference of external force is prevented, when the needle cylinder is used, the fixture block is pulled out from the clamping groove, the injection work of the needle head can be smoothly carried out, and the effectiveness of the needle head in use is improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive exercise.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is an enlarged view at A in FIG. 1;
FIG. 3 is a schematic structural diagram of an elastic block in the second embodiment;
in the figure: the needle sleeve 1, a puncture needle 2, a conical cavity 3, an elastic block 4, a limiting part 5, a circulation groove 6, a circulation hole 7, a clamping cavity 8, a needle cylinder 9, a piston 10, a push rod 11, a pressure rod 12, a clamping groove 13, a clamping block 14, an elastic body 15, a hard tube 16, a rigid layer 17, a circulation channel 18, a funnel-shaped cavity 19, a blocking block 20, a push rod 21, a cavity 22, an air passage 23, a sealing membrane 24 and an elastic piece 25.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The first embodiment is as follows:
referring to fig. 1-2, the single infection prevention type injection needle of the present invention includes a needle sheath 1 and a puncture needle 2 mounted on the needle sheath 1; the needle sleeve 1 is provided with a tapered cavity 3 with a wide top and a narrow bottom at the bottom, a spherical elastic block 4 is clamped in the middle of the tapered cavity 3, a limiting part 5 is arranged on the side wall of the tapered cavity 3 corresponding to the top end of the elastic block 4, the limiting part 5 can press the elastic block 4 against the side wall of the tapered cavity 3, a circulation groove 6 is arranged on the limiting part 5, a group of circulation holes 7 extending in the vertical direction are arranged on the outer surface of the elastic block 4 close to the side wall of the tapered cavity 3, a clamping cavity 8 matched with the shape of the elastic block 4 is arranged on the side wall of the tapered cavity 3 corresponding to the bottom end of the elastic block 4, when the elastic block 4 is pressed into the clamping cavity 8, the side wall of the clamping cavity 8 can seal the port of the circulation hole 7, the needle sleeve 1 is connected with a needle cylinder 9 at the top end, a piston 10 is slidably connected inside the needle cylinder 9, and a push rod 11 is fixedly connected to the top end of the piston 10, the middle part of the bottom end of the piston 10 is connected with a pressure lever 12; when the injection needle works, the injection needle in the prior art can be reused, and many patients often use the same needle repeatedly in order to save cost, so that the patients are easy to have infection or bad reaction in the injection process; when the injection needle head is used, before insulin is injected, the elastic block 4 is clamped in the conical cavity 3 between the limiting part 5 and the clamping cavity 8, when the push rod 11 pushes the piston 10 to apply pressure to liquid medicine in the needle cylinder 9, the liquid medicine can be injected into a patient body through the circulation groove 6, the circulation hole 7 and the puncture needle 2, when the piston 10 gradually finishes liquid medicine injection and drives the pressing rod 12 to move to the elastic block 4, the pressing rod 12 can extrude and deform the elastic block 4 until the elastic block 4 is pressed into the clamping cavity 8 and is tightly clamped with the elastic block, the side wall of the clamping cavity 8 can attach and block two ends of the circulation hole 7, so that the whole conical cavity 3 is blocked under the matching of the elastic block 4 and the clamping cavity 8, the purpose of automatically scrapping the needle head after the injection is finished is achieved, and the effect of single injection of the needle head is achieved, the problems of infection and the like caused by repeated use of the needle of a patient are reduced, and the safety of the injection needle in use is improved.
A clamping groove 13 is formed in the top end of the needle cylinder 9, and a clamping block 14 capable of limiting the position of the push rod 11 is clamped in the clamping groove 13 in an interference manner; during operation, before cylinder 9 uses, the fixture block 14 that sets up can restrict push rod 11 position, prevents that push rod 11 from pressing the elastomer 15 into joint chamber 8 under the interference of external force by accident, leads to the condition that the syringe needle became invalid, when cylinder 9 uses, extracts fixture block 14 from draw-in groove 13 is inside, can make the injection work of syringe needle go on smoothly, has improved the validity of syringe needle when using.
The bottom end of the interior of the needle cylinder 9 is filled with an elastic body 15, the middle part of the elastic body 15 is provided with a through hole for the pressure rod 12 to pass through, and the side wall of the elastic body 15 is arranged into a wave shape and is attached to the inner wall of the needle cylinder 9; the during operation, when piston 10 moved to elastomer 15 department, piston 10 can extrude elastomer 15 this moment, and elastomer 15 can stretch into in the needle cover 1 cavity on spacing portion 5 top when the pressurized to liquid medicine in this cavity plays extruded effect, thereby when not influencing the liquid medicine injection, the liquid medicine that has significantly reduced remains between piston 10 and elastomer 15, make injection and use that the liquid medicine can be more abundant, reduce the waste of liquid medicine.
The elastic body 15 is a wave-shaped air bag, and the air bag can penetrate through the circulation groove 6 and extend into a cavity formed by the limiting part 5, the side wall of the conical cavity 3 and the elastic body 15 when being pressed and deformed; the during operation is the form of gasbag through setting up elastomer 15, has increased the flexible deformation effect of elastomer 15 for the gasbag is receiving piston 10 when extrudeing, and the gasbag bottom can warp and stretch into in the cavity between spacing portion 5, conical cavity 3 and the elastomer 15, thereby can be with the more abundant extrusion of the liquid medicine in this cavity, further reduce the waste of liquid medicine.
A hard pipe 16 is arranged in the flow hole 7 in an interference manner; during operation, when the elastic block 4 is extruded and deformed under the action of the pressure rod 12 and the side wall of the tapered cavity 3, the hard tube 16 can support the flow through hole 7, the situation that the flow speed of the liquid medicine is influenced by the inward contraction of the flow through hole 7 caused by the deformation of the elastic body 15 is reduced, and the stability of the liquid medicine during injection is greatly improved.
The top end of the elastic block 4 is provided with a sliding chute, a rigid layer 17 is connected inside the sliding chute in a sliding manner, an elastic part 25 is connected between the top end of the rigid layer 17 and the end part of the sliding chute, and when the elastic block 4 is matched with the clamping cavity 8, the rigid layer 17 is positioned at the corner positions of the clamping cavity 8 and the conical cavity 3; when the clamping device works, after the elastic block 4 is matched with the clamping cavity 8, if the piston 10 is pulled forcibly and the inside of the conical cavity 3 is pumped, at the moment, the elastic block 4 is easy to be pressed and deformed under the action of the air pressure difference at the two sides of the clamping cavity 8 and is sucked to the top end of the clamping cavity 8 again, at the moment, by arranging the rigid layer 17, when the elastic block 4 moves towards the inside of the clamping cavity 8, the rigid layer 17 moves towards the top end of the sliding chute under the action of the corners of the clamping cavity 8 and the conical cavity 3, so that the elastic block 4 can be smoothly pressed into the clamping cavity 8, and then the rigid layer 17 is reset under the action of the elastic piece 25, and the rigid layer 17 is positioned at the corner positions of the clamping cavity 8 and the conical cavity 3, the deformation of the elastic block 4 corresponding to the corner positions of the clamping cavity 8 and the conical cavity 3 is greatly reduced, and the situation that the elastic block 4 is sucked into the top end of the conical cavity 3 and is reset is reduced, further improving the effect of automatic scrapping after the injection of the needle head.
A flow channel 18 is formed in the middle of the elastic block 4, a funnel-shaped cavity 19 with a narrow upper part and a wide lower part is formed in the bottom end of the flow channel 18, a blocking block 20 is connected to the side wall of the flow channel 18 through a traction rope, a top rod 21 is connected to the bottom end of the needle sleeve 1, and when the elastic block 4 is matched with the clamping cavity 8, the top rod 21 can tightly press the blocking block 20 to the side wall of the funnel-shaped cavity 19; the during operation, when elastic block 4 was located 8 tops in joint chamber, there was the clearance between blocking piece 20 and the funnel shape chamber 19 this moment, make the liquid medicine can follow opening 7 and the synchronous outflow of circulation channel 18, the injection speed of syringe needle has been improved, simultaneously when elastic block 4 impresses joint intracavity 8 insidely, ejector pin 21 can be pressed and block piece 20 this moment, and make blocking piece 20 hug closely on 19 inner walls in funnel shape chamber, and can block funnel shape chamber 19, thereby the effect of syringe needle single injection has been reached.
Example two:
referring to fig. 3, a group of cavities 22 is disposed at the top end of the elastic block 4, an air passage 23 communicated with the cavities 22 is disposed on the outer surface of the elastic block 4 corresponding to the bottom end of the limiting part 5, and a sealing film 24 is connected to the outer surface of the elastic block 4 corresponding to the outer end of the air passage 23; during operation, when the top end of the elastic block 4 is extruded by the compression rod 12, at the moment, when the cavity 22 is compressed, the internal gas can be pressed into the cavity between the sealing film 24 and the elastic block 4 through the air channel 23, so that the sealing film 24 can extrude the liquid in the cavity at the bottom end of the limiting part 5 to fully flow out when swelling, and the waste of liquid medicine is further reduced.
The working principle is as follows: before the insulin is injected, the elastic block 4 is clamped in the conical cavity 3 between the limiting part 5 and the clamping cavity 8, when the push rod 11 pushes the piston 10 to apply pressure to the liquid medicine in the needle cylinder 9, the liquid medicine can be injected into the patient body through the circulation groove 6, the circulation hole 7 and the puncture needle 2, when the piston 10 finishes the liquid medicine injection gradually and drives the pressure rod 12 to move to the elastic block 4, the pressure rod 12 can extrude and deform the elastic block 4 until the elastic block 4 is pressed into the clamping cavity 8 and tightly clamped with the clamping cavity, the side wall of the clamping cavity 8 can fit and block two ends of the circulation hole 7, so that the whole conical cavity 3 is blocked under the matching of the elastic block 4 and the clamping cavity 8, the purpose of automatic scrapping of the needle after the injection is finished is achieved, the effect of single injection of the needle is realized, and the problems of infection and the like caused by the repeated use of the needle of the patient are reduced, the safety of the injection needle is improved when in use; before the syringe 9 is used, the position of the push rod 11 can be limited by the arranged fixture block 14, the situation that the needle head fails due to the fact that the push rod 11 accidentally presses the elastic body 15 into the clamping cavity 8 under the interference of external force is prevented, and when the syringe 9 is used, the fixture block 14 is pulled out of the clamping groove 13, so that the injection work of the needle head can be smoothly carried out, and the effectiveness of the needle head in use is improved; when the piston 10 moves to the elastic body 15, the piston 10 can extrude the elastic body 15, and the elastic body 15 can extend into the cavity of the needle sleeve 1 at the top end of the limiting part 5 when being pressed and has an extruding effect on the liquid medicine in the cavity, so that the residue of the liquid medicine between the piston 10 and the elastic body 15 is greatly reduced while the injection of the liquid medicine is not influenced, the liquid medicine can be more fully injected and used, and the waste of the liquid medicine is reduced; by arranging the elastic body 15 in the form of an air bag, the expansion deformation effect of the elastic body 15 is increased, so that when the air bag is extruded by the piston 10, the bottom end of the air bag can deform and extend into a cavity among the limiting part 5, the conical cavity 3 and the elastic body 15, and therefore liquid medicine in the cavity can be more fully extruded out, and waste of the liquid medicine is further reduced; when the elastic block 4 is extruded and deformed under the action of the pressure lever 12 and the side wall of the tapered cavity 3, the hard tube 16 can support the flow through hole 7, so that the situation that the flow speed of the liquid medicine is influenced by the inward contraction of the flow through hole 7 caused by the deformation of the elastic body 15 is reduced, and the stability of the liquid medicine during injection is greatly improved; when the elastic block 4 is matched with the clamping cavity 8 and the piston 10 is pulled by force and the interior of the conical cavity 3 is pumped, at the moment, under the action of the air pressure difference at the two sides of the clamping cavity 8, the elastic block 4 is easy to be pressed and deformed and is sucked to the top end of the clamping cavity 8 again, at the moment, by arranging the rigid layer 17, when the elastic block 4 moves towards the inside of the clamping cavity 8, the rigid layer 17 moves towards the top end of the sliding chute under the acting force of the clamping cavity 8 and the corner of the conical cavity 3, so that the elastic block 4 can be smoothly pressed into the clamping cavity 8, and then the rigid layer 17 is reset under the action of the elastic piece 25, and the rigid layer 17 is positioned at the corner positions of the clamping cavity 8 and the conical cavity 3, so that the deformation of the elastic block 4 corresponding to the corner positions of the clamping cavity 8 and the conical cavity 3 is greatly reduced, thereby reducing the situation that the elastic block 4 is sucked into the top end of the conical cavity 3 and is reset, and further improving the effect of automatic scrapping after the injection of the needle head; when the elastic block 4 is positioned at the top end of the clamping cavity 8, a gap is reserved between the blocking block 20 and the funnel-shaped cavity 19, so that liquid medicine can synchronously flow out from the flow hole 7 and the flow channel 18, the injection speed of the needle head is improved, and when the elastic block 4 is pressed into the clamping cavity 8, the ejector rod 21 can press the blocking block 20, the blocking block 20 is tightly attached to the inner wall of the funnel-shaped cavity 19, and the funnel-shaped cavity 19 can be blocked, so that the single injection effect of the needle head is achieved; when the top end of the elastic block 4 is extruded by the compression rod 12, when the cavity 22 is compressed, the internal gas can be pressed into the cavity between the sealing film 24 and the elastic block 4 through the air channel 23, so that the sealing film 24 can extrude the liquid in the cavity at the bottom end of the limiting part 5 to fully flow out when swelling, and the waste of the liquid medicine is further reduced.
The foregoing illustrates and describes the principles, general features, and advantages of the present 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 (8)

1. A single infection-preventing injection needle comprises a needle sleeve (1) and a puncture needle (2) arranged on the needle sleeve (1); the method is characterized in that: the needle sleeve (1) is provided with a tapered cavity (3) with a wide upper part and a narrow lower part at the bottom end, a spherical elastic block (4) is clamped in the middle of the tapered cavity (3), a limiting part (5) is arranged on the side wall of the tapered cavity (3) corresponding to the top end of the elastic block (4), the limiting part (5) can press the elastic block (4) against the side wall of the tapered cavity (3), a circulation groove (6) is arranged on the limiting part (5), a group of circulation holes (7) extending in the vertical direction are formed in the outer surface of the elastic block (4) close to the side wall of the tapered cavity (3), a clamping cavity (8) matched with the elastic block in shape is arranged on the side wall of the tapered cavity (3) corresponding to the bottom end of the elastic block (4), when the elastic block (4) is pressed into the clamping cavity (8), the side wall of the clamping cavity (8) can block the port of the circulation hole (7), the needle guard is characterized in that the top end of the needle guard (1) is connected with a needle cylinder (9), a piston (10) is slidably connected inside the needle cylinder (9), the top end of the piston (10) is fixedly connected with a push rod (11), and the middle part of the bottom end of the piston (10) is connected with a press rod (12).
2. The single use anti-infection needle of claim 1, wherein: a clamping groove (13) is formed in the top end of the needle cylinder (9), and a clamping block (14) capable of limiting the position of the push rod (11) is clamped in the clamping groove (13) in an interference manner.
3. The single use anti-infection needle of claim 2, wherein: the bottom end of the interior of the needle cylinder (9) is filled with an elastic body (15), the middle of the elastic body (15) is provided with a through hole for the pressure rod (12) to pass through, and the side wall of the elastic body (15) is arranged into a wave shape and is attached to the inner wall of the needle cylinder (9).
4. A single use anti-infection injection needle as claimed in claim 3, wherein: the elastic body (15) is a wave-shaped air bag, and the air bag can penetrate through the circulating groove (6) and extend into a cavity formed by the limiting part (5), the side wall of the conical cavity (3) and the elastic body (15) when being deformed under pressure.
5. The single use anti-infection needle of claim 4, wherein: the hard pipe (16) is arranged in the flow hole (7) in an interference manner.
6. The single use anti-infection needle of claim 5, wherein: the spout has been seted up on the top of elastic block (4), the inside sliding connection of spout has rigid layer (17), be connected with elastic component (25) between the top of rigid layer (17) and the spout tip, when elastic block (4) and joint chamber (8) cooperate, rigid layer (17) are located the turning position department in joint chamber (8) and toper chamber (3).
7. The single use anti-infection needle of claim 6, wherein: the utility model discloses a funnel shape chamber, including elasticity piece (4), flow channel (18) have been seted up at elasticity piece (4) middle part, flow channel (18) bottom is provided with under narrow wide funnel shape chamber (19), be connected with plugging block (20) through the haulage rope on flow channel (18) lateral wall, needle cover (1) bottom is connected with ejector pin (21), when elasticity piece (4) and joint chamber (8) cooperate, ejector pin (21) can compress tightly plugging block (20) on funnel shape chamber (19) lateral wall.
8. The single use anti-infection needle of claim 7, wherein: elastic block (4) top is provided with a set of cavity (22), air flue (23) that are linked together with cavity (22) are seted up to elastic block (4) surface that spacing portion (5) bottom corresponds, elastic block (4) surface that air flue (23) outer end corresponds is connected with seal membrane (24).
CN202110592814.9A 2021-05-28 2021-05-28 Single infection-preventing type injection needle Active CN113332539B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113729497A (en) * 2021-09-26 2021-12-03 齐喝彩(上海)人工智能科技有限公司 Brewing structure for automatic beverage making machine

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US5312348A (en) * 1993-07-30 1994-05-17 Sans Ten S Single-usage disposable hypodermic syringe
CN2258071Y (en) * 1996-04-22 1997-07-23 曹建华 Needle retractable safety syringe
CN2546041Y (en) * 2002-05-28 2003-04-23 无锡市宇寿医疗器械有限公司 Safety self-destroy injector
CN1644223A (en) * 2005-01-25 2005-07-27 陈志法 Disposable self-destructing sterilized syringes
US20060100577A1 (en) * 2004-04-30 2006-05-11 Ming-Jeng Shue Disposable syringe with a retractable needle
CN109925571A (en) * 2017-12-15 2019-06-25 倪萍 A kind of medical disposable self-destruction syringe

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Publication number Priority date Publication date Assignee Title
CN1063824A (en) * 1991-01-30 1992-08-26 莫钊 Medical syringe capable of being discarded after being used once
US5312348A (en) * 1993-07-30 1994-05-17 Sans Ten S Single-usage disposable hypodermic syringe
CN2258071Y (en) * 1996-04-22 1997-07-23 曹建华 Needle retractable safety syringe
CN2546041Y (en) * 2002-05-28 2003-04-23 无锡市宇寿医疗器械有限公司 Safety self-destroy injector
US20060100577A1 (en) * 2004-04-30 2006-05-11 Ming-Jeng Shue Disposable syringe with a retractable needle
CN1644223A (en) * 2005-01-25 2005-07-27 陈志法 Disposable self-destructing sterilized syringes
CN109925571A (en) * 2017-12-15 2019-06-25 倪萍 A kind of medical disposable self-destruction syringe

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113729497A (en) * 2021-09-26 2021-12-03 齐喝彩(上海)人工智能科技有限公司 Brewing structure for automatic beverage making machine

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