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WO2016155418A1 - 注射笔 - Google Patents

注射笔 Download PDF

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Publication number
WO2016155418A1
WO2016155418A1 PCT/CN2016/073530 CN2016073530W WO2016155418A1 WO 2016155418 A1 WO2016155418 A1 WO 2016155418A1 CN 2016073530 W CN2016073530 W CN 2016073530W WO 2016155418 A1 WO2016155418 A1 WO 2016155418A1
Authority
WO
WIPO (PCT)
Prior art keywords
spiral
tube
rod
hole
sleeve
Prior art date
Application number
PCT/CN2016/073530
Other languages
English (en)
French (fr)
Inventor
叶进民
Original Assignee
群康生技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 群康生技股份有限公司 filed Critical 群康生技股份有限公司
Priority to US15/561,575 priority Critical patent/US10556065B2/en
Priority to KR1020177031241A priority patent/KR102078906B1/ko
Priority to JP2017549220A priority patent/JP6353610B2/ja
Priority to EP16771173.8A priority patent/EP3278828B1/en
Publication of WO2016155418A1 publication Critical patent/WO2016155418A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31525—Dosing
    • A61M5/31526—Dosing by means of stepwise axial movements, e.g. ratchet mechanisms or detents
    • 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
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
    • A61M5/31536—Blocking means to immobilize a selected dose, e.g. to administer equal doses
    • A61M5/31538—Permanent blocking, e.g. by medical personnel
    • 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
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • 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
    • 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
    • A61M5/31501—Means for blocking or restricting the movement of the rod or piston
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31566—Means improving security or handling thereof
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
    • A61M5/31581—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by rotationally moving or pivoting actuator operated by user, e.g. an injection lever or handle
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
    • A61M5/31585—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod performed by axially moving actuator, e.g. an injection button
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/32—Needles; Details of needles pertaining to their connection with syringe or hub; Accessories for bringing the needle into, or holding the needle on, the body; Devices for protection of needles
    • A61M5/3202—Devices for protection of the needle before use, e.g. caps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2403—Ampoule inserted into the ampoule holder
    • A61M2005/2407—Ampoule inserted into the ampoule holder from the rear
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M2005/3103—Leak prevention means for distal end of syringes, i.e. syringe end for mounting a needle
    • A61M2005/3104—Caps for syringes without needle
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—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
    • A61M2005/3152—Piston or piston-rod constructions, e.g. connection of piston with piston-rod including gearings to multiply or attenuate the piston displacing force
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/27—General characteristics of the apparatus preventing use
    • A61M2205/273—General characteristics of the apparatus preventing use preventing reuse, e.g. of disposables
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31566—Means improving security or handling thereof
    • A61M5/31571—Means preventing accidental administration
    • 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means

Definitions

  • the invention relates to a pen-shaped syringe, in particular to an injection pen which has the functions of safely controlling the injection dose and the labor saving effect.
  • the existing injection pens are mainly in the form of a metering type pen and a counting type pen.
  • the plunger is pressed by the rear end of the injection pen, and the piston in the medicine bottle is moved by a certain stroke distance by the interlocking control of the internal driving mechanism, and then the needle is output through the needle.
  • a predetermined dose of the agent Since the early metering type pen can achieve the function of quantitatively outputting a drug, it has a problem of difficulty in operation.
  • the existing metering type pen further utilizes a combination of a large pitch stroke structure and a small pitch stroke structure, and converts the force of the user directly pressing the plunger of the injection pen into a rotational force, and utilizes The rotary thrust of the large pitch stroke is converted to the injection torque of the small pitch stroke to achieve quantitative injection and labor saving effects.
  • the aforementioned injection pen can achieve the expected quantitative injection and labor saving effects, however, the injection pen may be accidentally pulled back and forth during the injection process. Based on the safety of injection, this is necessary to further improve and create.
  • the technical problem to be solved by the present invention is to provide an injection pen, which solves the problem that the push rod of the existing meter type injection pen may be mistakenly pulled backwards during the injection process.
  • the technical solution proposed by the present invention is to provide an injection pen comprising a circulation propulsion device and a medicine bottle casing, wherein the medicine bottle casing can connect a medicine bottle to the front end of the circulation propulsion device, wherein
  • the circulation propulsion device contains:
  • An engaging member having an inner plate portion and a one-way ratchet ring groove at a side end of the inner plate portion, the one-way ratchet ring groove wall forming a plurality of single oblique ratchet teeth formed in the inner plate portion a non-circular guiding hole, the front end of the engaging member is connected to the rear end of the vial casing;
  • spiral sleeve connected to the rear end of the joint member, wherein the spiral sleeve forms a front portion of the through hole and a rear portion of the through hole at the rear end of the front portion of the through hole, and a spiral groove is formed in the inner wall of the rear portion of the through hole
  • the front end of the spiral sleeve has a
  • the end wall of the rear portion of the spiral sleeve forms a long guide groove extending axially from the outer peripheral surface thereof and radially communicating with the rear portion of the through hole.
  • the long guide groove communicates with the front end and the rear end of the spiral groove to form a circular orbit.
  • the rear end of the spiral sleeve forms a rearwardly projecting axial anti-reciprocal elastic piece;
  • a spiral conduit comprising a tube portion, a front tube end portion at a front end of the tube portion, and a connecting wall between the end portion of the front tube and the tube portion, the driving portion forming a driving spiral guiding groove, the front tube end a plurality of anti-reverse ratchet springs are formed on the outer peripheral surface, and the spiral conduit is installed in the front section of the through hole of the spiral sleeve, and the front end of the spiral duct protrudes into the rear sleeve portion of the joint member through the front end of the spiral sleeve
  • the anti-reverse ratcheting elastic piece on the outer peripheral surface of the front tube end abuts against the single oblique ratchet in the one-way ratchet ring groove of the rear sleeve portion, so that the spiral guide can rotate in one direction;
  • a spiral propulsion tube having an axially penetrating central hole, the outer peripheral surface of the front section of the spiral propulsion tube forming a spiral guide block, the outer peripheral surface of the middle section of the spiral propulsion tube forming a guiding protrusion, the spiral propulsion tube rear section
  • the outer peripheral surface forms an axially extending release groove and a back-stop groove concavely arranged at equal intervals in the axial direction, the guiding protrusion and the release groove are respectively located on opposite sides of the spiral propulsion pipe, the spiral
  • the inner hole inner wall of the rear section of the propulsion pipe is formed with a one-way ratchet groove portion having a plurality of single oblique ratchets connected to the spiral conduit and the spiral sleeve, the spiral guide block screwing the spiral conduit Driving the spiral guide groove, the rear portion of the spiral propulsion pipe passes through the rear end of the spiral conduit and the rear end of the spiral sleeve, and the guiding protrusion can change position in a
  • a screwing collar is fixed in the front end of the spiral conduit, and a screw hole is formed in the screw collar;
  • a push rod comprising a rod body having a non-circular rod hole, the cross-sectional shape of the rod body corresponding to the non-circular guide hole of the joint member, the front portion of the rod body being a dose control section formed with an advancing thread on the outer peripheral surface,
  • the pitch of the propulsion thread is smaller than the pitch of the driving spiral guide groove of the spiral conduit, and the propulsion rod is installed in the spiral propulsion tube, and the propulsion rod has a dose control section of the propulsion thread screwed in the screw hole of the screwing collar, the propulsion The rod can pass through the guiding hole of the joint member in a linear motion;
  • a one-way ratchet ring comprising a ring portion and a plurality of single oblique radial anti-revolution springs formed on an outer circumferential surface of the ring portion, the one-way ratchet ring being mounted in a one-way ratchet groove of the spiral propulsion tube and Located behind the push rod, the radial anti-reciprocal spring of the one-way ratchet ring abuts against the single oblique ratchet of the one-way ratchet groove;
  • An injection operating member comprising a push rod and a push rod end cover, the push rod extending axially into the spiral sleeve and the spiral propulsion tube inside the spiral sleeve to the inside of the rod hole of the propeller rod
  • the one-way ratchet ring disposed in the spiral propulsion tube is sleeved and fixed on the push rod
  • the push rod end cover is located at the rear end of the spiral sleeve and is connected to the rear end of the push rod
  • the rear end of the spiral propulsion tube is rotatably connected to the push rod In the end cap.
  • the outer diameter of the front end of the spiral tube is smaller than the outer diameter of the tube portion, and a tube hole is formed in the tube portion, and the driving spiral guide groove is formed in the inner wall of the tube hole, the front portion a plurality of anti-reverse ratcheting elastic pieces are formed on the outer peripheral surface of the tube end, and a front tube hole is formed in the end portion of the front tube, and a tube middle hole is formed in the connecting wall, and the front tube hole communicates with the tube portion through the tube middle hole of the connecting wall
  • the front end of the front tube defines a plurality of fixing recesses extending from the front of the front tube, and the outer peripheral surface of the threaded collar forms a plurality of fixing lugs, and the plurality of fixing lugs are respectively inserted Positioned in the fixed recess of the front end of the spiral tube.
  • the rear end of the rod body of the push rod forms a plurality of recesses on the wall of the rod hole hole, and the front end of the loop portion of the one-way ratchet ring forms a plurality of hooks, and the plurality of hooks can respectively extend correspondingly a recess in the rod hole at the rear end of the push rod;
  • a rear end of the spiral propulsion tube is formed with a rearwardly projecting end portion having a barb portion;
  • the rear end of the push rod is a flanged end portion;
  • the push rod end cover comprises an end cover body and a cover body, wherein the end cover body has a plurality of connecting holes, and the assembled end portion of the rear end of the push rod and the pivot end of the rear end of the spiral propulsion tube are disposed together at the end In the assembly hole of the cover body, the cover body covers the rear end of the end cover body.
  • the push rod is provided with a plurality of hook holes at the front end of the dose control section of the rod body, the hook holes are radially connected to the rod hole from the outer peripheral surface of the rod;
  • the push rod is provided with a rod end at the front end of the rod body
  • the rod end member includes a pushing end portion, a fitting portion formed at the rear end of the pushing end portion, and a plurality of hooks located in the fitting portion, the rod end member being sleeved at the front end of the rod body with the fitting portion thereof
  • the hook is fixed by being engaged in the hook hole through the front end of the rod hole of the rod, and the rod end member is located in front of the inner plate portion of the joint member.
  • the outer diameter of the front end of the spiral tube is smaller than the outer diameter of the tube portion, and the front tube end portion and the tube portion have a connecting wall, and a tube hole is formed in the tube portion.
  • the driving spiral guide groove is formed in the inner wall of the tube hole, and the outer peripheral surface of the front tube portion forms a plurality of anti-reverse ratchet elastic pieces, and a front tube hole is formed in the end portion of the front tube, and a tube middle hole is formed in the connecting wall.
  • the front tube hole communicates with the tube hole of the tube portion through the hole in the tube of the connecting wall, and the front tube end portion forms a plurality of fixing recesses extending from the front to the rear of the front tube hole wall, and the outer peripheral surface of the threaded collar is formed into a plurality of holes a fixing protrusion, wherein the plurality of fixing protrusions are respectively positioned corresponding to the fixing recesses of the front end of the spiral tube; the rear end of the rod body of the pushing rod forms a plurality of concave portions on the wall of the rod hole, the one-way ratchet ring
  • the front end of the ring portion is formed with a plurality of hooks respectively corresponding to the recesses extending into the rod holes at the rear end of the push rod;
  • the rear end of the spiral propulsion tube is formed with a rearwardly protruding and barbed portion a connecting end;
  • the rear end of the push rod is a flanged connecting end;
  • the cover body is closed to the rear end of the end cap body;
  • the push rod is provided with a plurality of hook holes at the front end of the dose control section of the rod body, and the hook holes are radially connected to the rod hole from the outer peripheral surface of the rod;
  • the push rod is
  • the rod body has a rod end member at the front end thereof, and the rod end member includes a pushing end portion and a sleeve formed at the rear end of the pushing end portion a hook portion and a plurality of hooks located in the sleeve portion, the rod end member is sleeved on the front end of the rod body by the sleeve portion thereof, and the hook hook is fixed by being engaged in the hook hole through the front portion of the rod hole of the rod body, the rod end is fixed
  • the component is located in front of the inner panel portion of the joint member.
  • the front portion of the stem portion of the push rod forms a plurality of fastening recesses;
  • the rear side of the connecting wall of the spiral conduit forms a rearwardly projecting constricted ring portion;
  • the rod body of the push rod is adjacent to the dose control a portion of the rear end of the segment forms a plurality of slots extending radially from the outer peripheral surface of the rod hole, and each of the through slots defines a resilient hook, and the elastic hook protrudes from the outer peripheral surface of the rod, and the elastic hook can be
  • the constricted ring portion of the spiral conduit is squeezed and radially bent into the rod hole, and the elastic clasp can be fastened to the deduction recess of the push rod.
  • the injection pen further comprises a casing and a cover
  • the pen case is a front and rear axially penetrating member
  • the pen case is sleeved on the outer side of the spiral sleeve
  • the pen case is connected to the joint a rear end of the component, a pivoting end of the rear end of the spiral propulsion tube and a connecting end of the rear end of the push rod respectively extending outside the rear end of the pen case and connecting the push rod end cover
  • the pen cover is detachably sleeved on the The outer side of the vial case.
  • the joint member includes a front sleeve portion, a rear sleeve portion, a partition portion, and a set of end portions, and the front sleeve portion and the rear sleeve portion are respectively formed at the partition
  • the front and rear sides of the plate portion have an outer diameter smaller than an outer diameter of the front sleeve portion, the sleeve end portion protruding rearward from the rear side of the partition portion, and the sleeve end portion is located at the rear sleeve portion a plurality of first hooks are formed on the outer sleeve portion, and a plurality of protrusions are formed on the outer peripheral surface of the sleeve end portion, and a rear surface of the protrusion portion forms a sloped surface, and the rear side surface of the partition portion is at the sleeve end portion Forming a plurality of second hooks in a space between the rear sleeve portions, the sleeve end
  • the front portion of the stem portion of the push rod forms a plurality of fastening recesses;
  • the rear side of the connecting wall of the spiral conduit forms a rearwardly projecting constricted ring portion;
  • the rod body of the push rod is adjacent to the dose control a portion of the rear end of the segment forms a plurality of slots extending radially from the outer peripheral surface of the rod hole, and each of the through slots defines a resilient hook, and the elastic hook protrudes from the outer peripheral surface of the rod, and the elastic hook can be
  • the constricted ring portion of the spiral conduit is squeezed and radially bent into the rod hole, and the elastic clasp can be fastened to the deduction recess of the push rod.
  • the beneficial effect that can be achieved by the invention is that the injection pen has a combination of a large helical stroke structure of the driving screw guide groove of the spiral conduit and a small pitch stroke configuration of the propulsion rod, and the user presses the injection operation structure in a straight direction.
  • the force of the piece is transformed into the rotational force, and the rotational thrust of the large pitch stroke is used to convert the injection agent thrust of the small pitch stroke to achieve the effects of quantitative injection and labor saving.
  • the injection pen of the present invention further utilizes a radial anti-reciprocal elastic piece of a one-way ratchet ring provided on the push rod to abut against the one-way ratchet groove portion of the spiral propulsion pipe, and restrains the rotation direction of the push rod and the spiral propulsion pipe, and advances
  • the rod is not restricted by the non-circular guiding hole of the engaging member, and the axial anti-reciprocal elastic piece at the rear end of the spiral sleeve is located in the releasing groove of the spiral propelling tube, and the guiding protrusion is located in the long guiding groove to make the screw advance
  • the tube can only move straight forward with the injection operation member, and the spiral guide block on the outer circumferential surface of the spiral propulsion tube cooperates with the screw guide groove of the spiral conduit to drive the spiral guide to rotate in the forward direction, so that the spiral propulsion tube faces forward.
  • the spiral groove of the spiral sleeve and the screw propeller tube are not reversible until the spiral guide block on the outer peripheral surface of the spiral propeller tube is finished in the spiral guide groove of the spiral conduit to travel a lead distance for quantitative injection, and It can ensure the safety of the use of the pen.
  • the injection pen of the present invention uses the medicament in the medicament bottle to be used up, the injection pen can further utilize the position after the movement of the push rod, which is sufficient for the elastic hook on the push rod to be squeezed by the shrink ring of the spiral conduit. Pressing, the elastic clasp is bent radially and protrudes into the inside of the push rod, and the buckled recess of the push rod is braked and locked, so that the injection operation member can no longer be pulled backward, so that the injection pen is prevented from being overused and the injection is ensured. The safety of the pen.
  • Figure 1 is a perspective exploded view of a preferred embodiment of the injection pen of the present invention with a medicament bottle, a needle and a needle cover.
  • Figure 2 is a perspective exploded view of the circulation propulsion device of the preferred embodiment of the injection pen of Figure 1.
  • FIG. 3 is a perspective exploded view of another viewing angle of the circulation propulsion device in the preferred embodiment of the injection pen of FIG. 1.
  • FIGS. 1 to 3 are schematic cross-sectional views showing a preferred embodiment of the injection pen shown in FIGS. 1 to 3 in combination with a pharmaceutical bottle.
  • Fig. 5 is a partial enlarged view of Fig. 4;
  • Figure 6 is a partial enlarged view of another portion of Figure 4.
  • Figure 7 is a side cross-sectional view showing the position of the line A-A in Figures 4 and 5;
  • Figure 8 is a side cross-sectional view showing the position of the line B-B in Figures 4 and 6;
  • Figure 9 is a perspective view, partly in perspective, of the spiral bushing, the screw propulsion pipe and the push rod end cap in the circulating propulsion device shown in Figures 2 and 3.
  • Fig. 10 is a perspective view, partly in perspective, of the spiral bushing, the spiral propulsion pipe and the push rod end cap in the circulating propulsion device shown in Figs. 2 and 3.
  • Fig. 11 is a view showing an embodiment of the preferred embodiment of the injection pen of the present invention in which the medicine bottle is assembled, and the needle and the needle cover are attached, and the injection operation member is pulled backward.
  • Fig. 12 is a view (I) showing an embodiment of the preferred embodiment of the injection pen of the present invention for pressing the injection operation member forward.
  • Figure 13 is a diagram (2) of an embodiment of the preferred embodiment of the injection pen of the present invention for pressing the injection operation member forward.
  • Fig. 14 is a view showing an implementation state of a preferred embodiment of the injection pen of the present invention when the medicine used in the medicine bottle is used up.
  • Fig. 15 is a view (1) showing an implementation state in which a preferred embodiment of the injection pen of the present invention is in a locked state when the medicine in the medicine bottle is used up.
  • Fig. 16 is a view (2) showing an implementation state in which a preferred embodiment of the injection pen of the present invention is in a locked state when the medicine in the medicine bottle is used up.
  • FIG. 1 a schematic exploded view of a preferred embodiment of the injection pen of the present invention and the medicament bottle 3 , the needle 4 and the needle cover 5 is disclosed.
  • the injection pen is used in combination with the medicine bottle 3 , the needle 4 and the needle cover 5 .
  • the injection pen comprises a circulation propulsion device 1 and a vial casing 2, or the injection pen further comprises a casing 6 and a cover 7.
  • the circulating propulsion device 1 includes an engaging member 10 , a spiral sleeve 20 , a spiral conduit 30 , a screw propeller tube 40 , a screw collar 50 , a propeller rod 60 , and a propeller rod 60 .
  • a one-way ratchet ring 70 and an injection operating member 80 wherein:
  • an inner plate portion 11 and a one-way ratchet ring groove 12 at the side end of the inner plate portion 11 are formed in the joint member 10.
  • the groove of the one-way ratchet ring groove 12 is formed in plurality.
  • a single oblique ratchet, a non-circular guiding hole 111 is formed in the inner plate portion 11.
  • the non-circular guiding hole 111 is a polygonal hole having at least one positioning plane or has a two-radial relative positioning plane. Perforations or other non-circular perforations.
  • the joint member 10 includes a front sleeve portion 13, a rear sleeve portion 14, a partition portion 15, and a set of end portions 16, a front sleeve portion 13 and a rear sleeve portion 14.
  • the outer diameter of the rear sleeve portion 14 is smaller than the outer diameter of the front sleeve portion 13, and the sleeve end portion 16 projects rearward from the rear side of the partition portion 15, and is sleeved.
  • the end portion 16 is located outside the rear sleeve portion 14, and the front sleeve portion 13 is for assembling the rear end of the vial casing 2, and the medicament bottle 3 can pass through the inside of the front sleeve portion 13 into the rear sleeve portion 14,
  • the inner plate portion 11 and the one-way ratchet ring groove 12 are formed in the inner peripheral wall of the rear sleeve portion 14.
  • a plurality of first hooks 131 are formed on the front sleeve portion 13 of the joint member 10 for The cartridge sleeve 2 is snapped, and the rear side of the partition portion 15 of the joint member 10 forms a plurality of second hooks 141 in a space between the sleeve end portion 16 and the rear sleeve portion 14, and the sleeve end portion
  • a plurality of bumps 161 are formed on the outer peripheral surface, and a rear surface of the bump 161 is formed with a sloped surface.
  • the sleeve end portion 16 is further provided with two alignment recesses 162 extending from the rear to the front.
  • the spiral sleeve 20 is assembled to the rear end of the joint member 10 , and a through hole front section 21 and a through hole rear section 22 at the rear end of the front end 21 of the through hole are formed in the spiral sleeve 20 .
  • the through-hole front section 21 is combined with the through-hole rear section 22 to form a through-hole extending axially through the inside of the spiral sleeve 20.
  • the aperture of the front section 21 of the through-hole is larger than the aperture of the rear section 22 of the through-hole, and is located at the rear section 22 of the through-hole.
  • the inner bore wall defines a spiral groove 23 having a complete spiral lead.
  • the front end of the spiral sleeve 20 has a combined end portion 24, and the circumferential wall of the rear portion of the spiral sleeve 20 forms an axial extension and The outer peripheral surface thereof radially communicates with the long guide groove 25 of the rear portion 22 of the through hole, and the long guide groove 25 communicates with the front end and the rear end of the spiral groove 23 to form a circulation track, and the rear end of the spiral sleeve 20 also forms a rearward convex protrusion.
  • the axial anti-back spring 26, the rear end of the axial anti-back spring 26 is a free end, so that the axial anti-back spring 26 has the elasticity of swinging up and down.
  • the side wall of the coupling end portion 24 of the spiral sleeve 20 is formed with a plurality of card holes 241 and two alignment protrusions 242.
  • the spiral sleeves 20 are correspondingly assembled to the joint member 10 Between the rear sleeve portion 14 and the sleeve end portion 16 , the second hook 141 of the joint member 10 is engaged with the card hole 241 of the spiral sleeve 20 , and the alignment convex portion 242 is correspondingly inserted into the alignment recess 162 . in.
  • the spiral conduit 30 includes a tube portion 31 and a front tube end portion 32 formed at the front end of the tube portion 31.
  • the outer diameter of the front tube end portion 32 is smaller than the outer diameter of the tube portion 31, and
  • the front tube end portion 32 and the tube portion 31 have a connecting wall 33.
  • the tube portion 31 defines a tube hole 311 and a driving spiral guiding groove 34 formed in the hole wall of the tube hole 311.
  • the driving spiral guiding groove 34 has A complete spiral lead, the outer peripheral surface of the front tube end portion 32 forms a plurality of anti-reverse ratcheting elastic pieces 35, a front tube hole 321 is formed in the front tube end portion 32, and the front tube end portion 32 is formed in the front tube hole 321 hole.
  • the wall is formed with a plurality of fixing recesses 322 extending from the rear to the rear, and a tube hole 331 is formed in the connecting wall 33.
  • the front tube hole 321 communicates with the tube hole 311 of the tube portion 31 through the tube center hole 331 of the connecting wall 33.
  • the spiral tube 30 Installed in the through-hole front section 21 of the spiral sleeve 20, the front tube end portion 32 of the spiral conduit 30 extends beyond the front end of the spiral sleeve 20, and the front tube end portion 32 projects into the rear sleeve portion 14 of the joint member 10,
  • the anti-reverse ratcheting piece 35 of the outer peripheral surface of the front tube end portion 32 abuts against the single oblique ratchet in the one-way ratchet ring groove 12 of the rear cannula portion 14, so that the spiral catheter 30 Can be unidirectional rotation.
  • a constricted loop portion 36 projecting rearwardly is formed at the periphery of the tube center hole 331 on the rear side of the engaging wall 33.
  • the spiral propulsion tube 40 has an axial through hole 41 therein, and the spiral propulsion tube 40 forms a spiral guide block 42 on the outer circumferential surface of the front section thereof, and the middle portion of the spiral propulsion tube 40
  • the outer peripheral surface is formed with a guiding protrusion 43.
  • the outer peripheral surface of the rear section of the spiral propelling tube 40 forms an axially extending release groove 44 and a plurality of backstop rings which are arranged at equal intervals in the axial direction at the periphery of the release groove 44.
  • a pattern 45, the guiding protrusion 43 and the release groove 44 are respectively located
  • the diametrically opposite sides of the auger tube 40, the inner wall 41 of the rear section of the auger tube 40 is formed with a one-way ratchet groove portion 46 having a plurality of single oblique ratchet teeth.
  • the spiral propulsion tube 40 is disposed in the spiral conduit 30 and the spiral sleeve 20, and the spiral guide block 42 is screwed to the driving spiral guide groove 34 of the spiral conduit 30, and the rear portion of the spiral propulsion tube 40 extends beyond the rear end of the spiral conduit 30.
  • the guiding protrusion 43 can change position in the circulating track formed by the spiral groove 23 and the long guiding groove 25, and the spiral propelling tube 40 can pass along the guiding protrusion 43
  • the spiral groove 23 is spirally advanced or receding linearly along the long guide groove 25, and the axial anti-reciprocal elastic piece 26 at the rear end of the spiral sleeve 20 can be displaced between the release groove 44 and the check ring groove 45.
  • the rear end of the auger tube 40 further defines a pivoting end portion 47 that projects rearwardly and has a barb portion.
  • the threaded collar 50 is fixed in the front tube hole 321 of the front tube end portion 32 of the spiral conduit 30 , and a screw hole 51 is formed in the threaded collar 50 .
  • the outer peripheral surface of the sprocket collar 50 is formed with a plurality of fixing protrusions 52, which are respectively positioned corresponding to the fixing recesses 322 of the front tube end portion 32 of the spiral duct 30.
  • the push rod 60 includes a rod body 61 having an axially penetrating and non-circular rod hole 62.
  • the cross-sectional shape of the rod body 61 corresponds to the non-circular guide of the joint member 10.
  • the pilot hole 111 has a dose control section 63 on the outer peripheral surface of which the advancement thread 631 is formed.
  • the pitch of the advancement thread 631 is smaller than the pitch of the drive spiral guide groove 34 of the spiral conduit 30.
  • the cross-sectional shape of the dose control section 63 is Corresponding to the non-circular shape of the guiding hole 111 of the engaging member 10, the rod body 61 forms a radially protruding flange 632 adjacent to the rear end portion of the dose control section 63, and the rear end of the rod body 61 forms a radially convex end. edge.
  • the push rod 60 is mounted in the auger tube 40.
  • the push rod 60 has a rear end of the end edge extending beyond the rear end of the screw propeller tube 40.
  • the dose control section 63 having the advancement thread 631 is screwed to the screw collar 50.
  • the screw holes 51 correspond to the guide holes 111 passing through the joint member 10.
  • the front end of the pusher lever 60 can directly serve as a portion for pushing the piston 3A inside the vial 3 or, as in the preferred embodiment, the pusher lever 60 further includes a rod end member 65.
  • the rod end member 65 is fixed to the front end of the rod body 61, and the rod end member 65 serves as a member for pushing the piston 3A inside the medicine bottle 3.
  • the rod end member 65 includes a pushing end portion 651, a fitting portion 652 formed at the rear end of the pushing end portion 651, and a plurality of hooks 653 located in the fitting portion 652.
  • the rod end member 65 has a fitting portion thereof. 652 is sleeved on the front end of the rod body 61.
  • the hook 653 is engaged with the hook hole 613 through the front portion of the rod hole 62 of the rod body 61, so that the rod end piece 65 is fixed to the front end of the rod body 61, and the rod end piece 65 is located at the inner plate of the joint member 10. In front of the department 11.
  • the rear portion of the rod 61 of the push rod 60 is adjacent to the dose control portion 63 to form a plurality of slots 611 extending from the outer peripheral surface of the radial connecting rod hole 62.
  • the hook 612 protrudes from the outer peripheral surface of the rod 61, and the elastic clasp 612 can be folded by the constricted ring portion 36 of the spiral conduit 30.
  • the tire is extruded and radially bent into the rod hole 62.
  • the rear end of the rod body 61 can also form a plurality of recesses in the hole wall of the rod hole 62.
  • the front end of the dose control section 63 of the rod body 61 is provided with a plurality of hook holes 613, and the hook holes 613 radially communicate with the rod holes 62 from the outer peripheral surface of the rod body 61.
  • the one-way ratchet ring 70 includes a ring portion 71 and a plurality of single oblique radial anti-reciprocal elastic pieces 72 formed on the outer circumferential surface of the ring portion 71.
  • An inner hole 711 is formed in the ring portion 71, and the inner hole 711 is a non-circular hole corresponding to the rod hole 62 of the push rod 60.
  • the one-way ratchet ring 70 is mounted in the one-way ratchet groove portion 46 of the auger tube 40 and is located behind the propulsion rod 60.
  • Each of the radial anti-reciprocal elastic pieces 72 of the one-way ratchet ring 70 abuts the single To the single oblique ratchet of the ratchet groove portion 46.
  • a plurality of clasps 73 are formed at the front end of the ring portion 71, and the plurality of clasps 73 can respectively extend into the recesses in the rod holes 62 at the rear end of the rod 61 of the push rod 60.
  • the injection operating member 80 includes a push rod 81 and a push rod end cover 82.
  • the push rod 81 includes a rod portion 811 and a joint end portion 812 formed at the rear end of the rod portion 811.
  • the rod portion 811 is an elongated member having a non-circular cross-sectional shape, and the cross-sectional shape of the rod portion 811 corresponds to the shape of the non-circular rod hole 62 of the push rod 60, and the rear portion of the rod portion 811 forms a plurality of positions.
  • a recess 813 having a radially projecting flange.
  • the rod portion 811 of the push rod 81 extends into the rear end of the spiral sleeve 20, the rear end of the screw propeller tube 40, the inner hole 711 of the one-way ratchet ring 70, and the rod hole 62 of the push rod 60.
  • the one-way ratchet ring 70 is buckled.
  • the hooks 73 are respectively engaged with the positioning recesses 813 of the rod portion 811, and the one-way ratchet ring 70 is fixed to the rod portion 811 of the push rod 81.
  • the push rod end cover 82 is located at the rear end of the spiral sleeve 20, and the assembly end portion 812 at the rear end of the push rod 81 and the pivot end portion 47 at the rear end of the spiral propulsion tube 40 are assembled together in the push rod end cover 82, and the screw advancement The tube 40 can be rotated in the push rod end cap 82.
  • the front portion of the rod portion 811 of the push rod 81 further defines a plurality of fastening recesses 814, so that the fastening recess portion 814 provides a portion where the elastic hook 612 of the push rod 60 is locked.
  • the push rod end cover 82 includes an end cover body 821 and a cover body 822.
  • the end cover body 821 has a plurality of connecting holes, a connecting end portion 812 at the rear end of the push rod 81, and a pivot end portion of the rear end of the screw propeller tube 40. 47 is disposed in the assembly hole of the end cap body 821, and the cover body 822 is closed to the rear end of the end cap body 821.
  • the vial case 2 is for providing a drug bottle 3, wherein a front end of the vial case 2 can be assembled with a needle 4, and the needle 4 can pass through the vial sleeve.
  • the front end of the shell 2 extends into the vial 3.
  • the rear end of the vial casing 2 can be assembled to the front end of the joint member 10.
  • the rear end of the vial casing 2 has a joint portion 2A, and the joint portion 2A defines a plurality of hook holes 2B.
  • the joint portion 2A can be sleeved on the outer side of the front sleeve portion 13 of the joint member 10, and the hook hole 2B can be respectively engaged with the first hook portion 131 on the front sleeve portion 13.
  • the pen case 6 is a front and rear axially penetrating member.
  • the pen case 6 can be sleeved on the outer side of the spiral sleeve 20 and assembled to the rear end of the joint member 10, and the spiral propeller tube 40 pivoting end 47 and push rod 81
  • the end portion 812 of the end extends beyond the rear end of the pen case 6 to assemble the push rod end cover 82.
  • the front end of the pen case 6 is sleeved on the outer side of the sleeve end 16 of the joint member 10.
  • the front end of the pen case 6 is provided with a plurality of recesses 6A, and the outer peripheral surface of the sleeve end 16 is The plurality of bumps 161 are respectively coupled to the recesses 6A of the pen case 6 to be coupled together.
  • the pen cover 7 is detachably assembled to the outside of the vial casing 2.
  • FIG. 1 As shown in FIG. 1, FIG. 4 and FIG. 5, when the injection pen of the present invention assembles the pharmaceutical bottle 3, the rear end of the pharmaceutical bottle 3 is inserted into the joint member 10 before the vial casing 2 is assembled with the circulation propulsion device 1.
  • the rod end member 65 at the front end of the push rod 60 extends into the rear end of the medicament bottle 3 to abut the piston 3A, and then the vial sleeve 2 is sleeved on the outside of the vial 3 to the vial case.
  • the joint portion 2A of the rear end is sleeved outside the front sleeve portion 13 at the front end of the joint member 10, wherein the plurality of hook holes 2B provided on the rear end joint portion 2A of the vial casing 2 and the joint member 10 are The first hooks 131 on the front sleeve portion 13 are respectively fixed correspondingly to the hooks.
  • the outer side of the joint portion 2A at the rear end of the vial casing 2 can also be coupled with a fixing collar 2C to make the vial casing 2 and the joint member 10 Firmly combined together.
  • FIG. 7 and FIG. 8 when the user uses the injection pen with the drug bottle 3, it is prepared before the injection, the pen cover 7 is first removed, and the needle 4 is installed in the medicine bottle cover. At the front end of the shell 2, the needle 4 passes through the front end of the vial casing 2 and penetrates into the medicament bottle 3. At this time, the needle cover 5 can be covered on the outside of the needle 4 to prevent the user from being mistakenly stabbed by the needle 4.
  • the injection operation member 80 of the circulation propulsion device 1 is pulled straight backward in the axial direction to the preparatory position.
  • the spiral propulsion tube 40 In the process of pulling the injection operation member 80 backward, the spiral propulsion tube 40 is driven to move backward, and the spiral propulsion tube 40 is simultaneously idling inside the spiral sleeve 20 and the spiral conduit 30, and is fixed on the push rod.
  • the radial anti-reciprocal spring piece 72 of the one-way ratchet ring 70 on the 81 abuts against the one-way ratchet groove portion 46 of the auger tube 40, and the anti-reverse ratchet element 35 of the front end portion 32 of the spiral tube 30 abuts In the one-way ratchet ring groove 12 of the joint member 10, the direction of rotation of the push rod 81 and the screw advance tube 40 is restrained, so that the screw advance tube 40 can be turned out only in one direction.
  • the axial anti-reciprocal elastic piece 26 at the rear end of the spiral sleeve 20 bounces at the check ring concave 45 of the auger tube 40 to generate a sound, and utilizes the check ring of the spiral propulsion tube 40.
  • the position of the axial anti-back spring 26 at the rear end of the spiral sleeve 20 can function to prevent the injection operation member 80 from being erroneously pressed to drive the auger tube 40 to move forward in the axial direction, ensuring that the injection operation member 80 is rearward. During the process of pulling out, it will not be retracted and retracted.
  • the spiral propulsion tube 40 is rotated one full turn, as shown in FIG. 10, the axially-reverse elastic piece 26 of the spiral sleeve 20 enters the release groove 44 of the auger tube 40, and the axial reversal elastic piece 26 is released. system.
  • the needle cover 5 is removed, the needle 4 is inserted into the predetermined injection site of the human body, and when the injection operation member 80 is pressed to start the injection, as shown in Figs. 12 and 13, the operation member 80 is injected.
  • the push rod end cover 82 is biased toward the front, and the injection operation member 80 is linearly moved, and the auger tube 40 is pushed together.
  • the guide projection 43 is located in the long guide groove 25, so that the screw advancement tube 40 can only move straight forward together with the injection operation member 80, and the spiral guide block on the outer circumferential surface of the spiral advancement tube 40. 42 is screwed into the helical guide groove 34 of the spiral conduit 30 to drive the helical conduit 30 to rotate in the forward direction.
  • the screw advancement tube 40 is advanced forward, it is not retractable by the cooperation of the spiral groove 23 of the spiral sleeve 20 and the screw advancement tube 40.
  • the spiral guide 42 of the outer circumferential surface of the spiral propulsion tube 40 completes a lead distance (ie, one complete lead) in the driving spiral guide groove 34 of the spiral conduit 30, the spiral conduit 30 is pushed by the spiral propulsion tube 40.
  • the driving spiral guide groove 34 of the spiral conduit 30 is a combination of the large pitch stroke configuration and the advancement thread 631 of the push rod 60 in a small pitch stroke configuration, and the force of the user directly pressing the injection operation member 80 is converted into the rotational force. And use the rotary thrust of the large pitch stroke to switch to the injection torque of the small pitch stroke to achieve labor-saving effect.
  • the injection pen can be reused until the medicine in the medicine bottle 3 is used up.
  • the injection pen When the medicine contained in the medicine bottle 3 installed in the injection pen is used up, the injection pen must be discarded.
  • FIGS. 14 to 16 when the injection pen is used up to the medicine in the medicine bottle 3, the position of the push rod 60 in the injection pen after the movement is sufficient to make the elastic hook 612 on the push rod 60.
  • the elastic clasp 612 is radially bent to extend into the interior of the push rod 60, and the snap recess 814 of the push rod 81 is buckled to be brake-locked, so that the injection operating member 80 is It can no longer be pulled backwards to avoid the overuse of the pen, ensuring the safety of the pen.

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Abstract

一种注射笔，包含循环推进装置(1)和药瓶套壳(2)，用以结合药剂瓶(3)及针头(4)，循环推进装置(1)包含接合构件(10)、螺旋套管(20)、螺旋导管(30)、螺旋推进管(40)、螺接套环(50)、推进杆(60)、单向棘轮环(70)和注射操作构件(80)；注射时，推杆(81)上的单向棘轮环(70)与螺旋推进管(40)的单向棘齿槽部(46)结合，约束推杆(81)与螺旋推进管(40)的旋转方向，推进杆(60)为接合构件(10)所限制而无法转动。

Description

注射笔 技术领域
本发明涉及一种笔形的注射器，尤指一种兼具安全控制注射剂量及注射省力等功能的注射笔。
背景技术
为使注射笔在安全规范下能够有限次数的重复使用，现有的注射笔大概有计量型注射笔与计次型注射笔两种形式。其中，已知计量型注射笔于组装药剂瓶后，其利用按压注射笔后端的推杆动作，通过内部的驱动机构的连动控制来推动药剂瓶内的活塞移动一定行程距离，进而通过针头输出预定剂量的药剂。由于早期的计量型注射笔虽能达到定量输出药剂的功能，但在使用上有操作费力的问题。为解决前述操作费力的问题，现有的计量型注射笔即进一步利用大螺距行程构造与小螺距行程构造的组合，将使用者直向按压注射笔的推杆的力量转变为旋转力量，并利用大螺距行程的旋转推力转换至小螺距行程的注射药剂推力，达到定量注射和省力的功效。
前述注射笔虽能达到预期的定量注射和省力等功效，然而，该注射笔在注射过程中，该推杆有可能向后误拉折返。基于注射的安全性，对此有进一步加以改良创造的必要。
发明内容
本发明所要解决的技术问题是：提供一种注射笔，解决现有计量型注射笔在注射过程中，其推杆有可能向后误拉折返的问题。
本发明所提出的技术解决方案是：提供一种注射笔，其包含一循环推进装置以及一药瓶套壳，该药瓶套壳能将一药剂瓶连接于该循环推进装置前端，其中，该循环推进装置包含：
一接合构件，其内部具有一内板部以及一位于内板部侧端的单向棘齿环槽，该单向棘齿环槽槽壁形成多个单斜向棘齿，该内板部中形成一非圆形的导引孔，该接合构件前端连接该药瓶套壳后端；
一螺旋套管，其连接于接合构件的后端，该螺旋套管中形成一通孔前段与一衔接通孔前段后端的通孔后段，于该通孔后段的内孔壁形成一螺旋槽，该螺旋套管前端具有一 结合端部，该螺旋套管后段周壁形成一轴向延伸且自其外周面径向连通通孔后段的长导槽，该长导槽连通螺旋槽的前端与后端而形成一循环轨道，该螺旋套管后端形成一朝后凸伸的轴向止逆弹片；
一螺旋导管，其包含一管部、一位于管部前端的前管端部以及一位于前管端部与管部之间的衔接壁，该管部内形成一驱动螺旋导槽，该前管端部外周面形成多个止逆棘齿弹片，该螺旋导管装设于螺旋套管的通孔前段内，该螺旋导管的前管端部通过螺旋套管前端而伸入接合构件的后套管部中，该前管端部外周面的止逆棘齿弹片抵接于后套管部的单向棘齿环槽中的单斜向棘齿上，使螺旋导管能单向旋转；
一螺旋推进管，其具有一轴向贯通的中孔，该螺旋推进管前段的外周面形成一螺旋导块，该螺旋推进管中段的外周面形成一导引凸块，该螺旋推进管后段的外周面形成一沿轴向延伸的放行沟槽以及沿轴向等间距排列的逆止环凹纹，该导引凸块与放行沟槽分别位于螺旋推进管径向相对的两侧，该螺旋推进管后段的中孔内孔壁形成有一具有多个单斜向棘齿的单向棘齿槽部，该螺旋推进管连接于螺旋导管与螺旋套管中，该螺旋导块螺接螺旋导管的驱动螺旋导槽，该螺旋推进管后段通过螺旋导管后端及螺旋套管后端外，该导引凸块能于螺旋槽与长导槽构成的循环轨道中变换位置，该螺旋推进管的导引凸块能沿着螺旋槽螺旋前进或沿着长导槽直线后退，该螺旋套管后端的轴向止逆弹片能于该螺旋推进管的放行沟槽与逆止环凹纹之间变换位置；
一螺接套环，其固设于螺旋导管的前管端部中，该螺接套环中形成一螺孔；
一推进杆，其包含一内有非圆形杆孔的杆体，该杆体的断面形状对应于接合构件的非圆形导引孔，该杆体前段为一外周面形成有推进螺纹的剂量控制段，该推进螺纹的螺距小于螺旋导管的驱动螺旋导槽的螺距，该推进杆装设于螺旋推进管内，该推进杆具有推进螺纹的剂量控制段螺设于螺接套环的螺孔中，该推进杆能直线运动地穿过接合构件的导引孔；
一单向棘轮环，其包含一环部以及形成于环部外周面的多个单斜向的径向止逆弹片，该单向棘轮环装设于螺旋推进管的单向棘齿槽部内且位于推进杆后方，该单向棘轮环的径向止逆弹片抵接于单向棘齿槽部的单斜向棘齿上；以及
一注射操作构件，其包含一推杆以及一推杆端盖，该推杆能轴向直线运动地伸入螺旋套管及位于螺旋套管内部的螺旋推进管至推进杆的杆孔内部，装设于螺旋推进管内的单向棘轮环套设固定于推杆上，该推杆端盖位于螺旋套管后端且连接推杆的后端，该螺旋推进管后端能旋转地连接于推杆端盖中。
如上所述的注射笔中，该螺旋导管的前管端部的外部直径小于管部的外部直径，该管部中形成一管孔，该驱动螺旋导槽形成于管孔内孔壁，该前管端部外周面形成多个止逆棘齿弹片，该前管端部中形成一前管孔，该衔接壁中形成一管中孔，该前管孔通过衔接壁的管中孔连通管部的管孔，该前管端部于前管孔孔壁形成多个由前往后延伸的固定凹部，该螺接套环外周面形成多个固定凸块，该多个固定凸块分别对应置入于螺旋导管的前管端部的固定凹部中定位。
如上所述的注射笔中，该推进杆的杆体后端于杆孔孔壁形成多个凹部，该单向棘轮环的环部前端形成多个扣钩，该多个扣钩能分别对应伸入推进杆后端的杆孔内的凹部中；该螺旋推进管后端形成一朝后凸伸且具有倒钩部的枢接端部；该推杆后端为一具有凸缘的组接端部；该推杆端盖包含有一端盖本体以及一盖体，该端盖本体中具有一组接孔，该推杆后端的组接端部以及螺旋推进管后端的枢接端部一同穿设于端盖本体的组接孔中，该盖体盖合于端盖本体后端。
如上所述的注射笔中，该推进杆于杆体的剂量控制段前端设有多个钩孔，所述钩孔自杆体外周面径向连通杆孔；该推进杆于杆体前端设有一杆端部件，该杆端部件包含一推抵端部、一形成于推抵端部后端的套合部以及多个位于套合部内的卡钩，该杆端部件以其套合部套接于杆体前端，该卡钩通过杆体的杆孔前段而卡接于钩孔中而固定，该杆端部件位于接合构件的内板部前方。
如上所述的注射笔中，该螺旋导管的前管端部的外部直径小于管部的外部直径，该前管端部与管部间具有一衔接壁，该管部中形成一管孔，该驱动螺旋导槽形成于管孔内孔壁，该前管端部外周面形成多个止逆棘齿弹片，该前管端部中形成一前管孔，该衔接壁中形成一管中孔，该前管孔通过衔接壁的管中孔连通管部的管孔，该前管端部于前管孔孔壁形成多个由前往后延伸的固定凹部，该螺接套环外周面形成多个固定凸块，该多个固定凸块分别对应置入于螺旋导管的前管端部的固定凹部中定位；该推进杆的杆体后端于杆孔孔壁形成多个凹部，该单向棘轮环的环部前端形成多个扣钩，该多个扣钩能分别对应伸入推进杆后端的杆孔内的凹部中；该螺旋推进管后端形成一朝后凸伸且具有倒钩部的枢接端部；该推杆后端为一具有凸缘的组接端部；该推杆端盖包含有一端盖本体以及一盖体，该端盖本体中具有一组接孔，该推杆后端的组接端部以及螺旋推进管后端的枢接端部一同穿设于端盖本体的组接孔中，该盖体盖合于端盖本体后端；该推进杆于杆体的剂量控制段前端设有多个钩孔，所述钩孔自杆体外周面径向连通杆孔；该推进杆于杆体前端设有一杆端部件，该杆端部件包含一推抵端部、一形成于推抵端部后端的套 合部以及多个位于套合部内的卡钩，该杆端部件以其套合部套接于杆体前端，该卡钩通过杆体的杆孔前段而卡接于钩孔中而固定，该杆端部件位于接合构件的内板部前方。
如上所述的注射笔中，该推杆的杆部前段形成多个扣制凹部；该螺旋导管的衔接壁后侧面形成一朝后凸伸的缩口环部；该推进杆的杆体邻近剂量控制段后端的部位形成多个自外周面径向连通杆孔的穿槽，每一该穿槽中分别形成一弹性扣钩，所述弹性扣钩凸出杆体的外周面，该弹性扣钩能被螺旋导管的缩口环部挤压而径向弯曲伸入杆孔内，该弹性扣钩能扣制于推杆的扣制凹部。
如上所述的注射笔中，该注射笔还包含一笔壳以及一笔盖，该笔壳是一前后轴向贯通的部件，该笔壳套设于螺旋套管外侧，该笔壳连接于接合构件的后端，该螺旋推进管后端的枢接端部与推杆后端的组接端部分别伸出笔壳后端外侧且连接推杆端盖；该笔盖是能拆组地套设于药瓶套壳外侧。
如上所述的注射笔中，该接合构件包含一前套管部、一后套管部、一隔板部以及一套接端部，该前套管部与后套管部分别形成于该隔板部前、后侧，该后套管部的外部直径小于前套管部的外部直径，该套接端部自隔板部后侧朝后凸伸，该套接端部位于后套管部外侧，该前套管部上形成多个第一卡钩，该套接端部外周面形成多个凸块，所述凸块后端形成斜面，该隔板部后侧面于套接端部与后套管部之间的空间中形成多个第二卡钩，该套接端部设有二由后往前延伸的对位凹部；该药瓶套壳端具有一结合部，该结合部上形成多个卡钩孔，该结合部能套接于接合构件的前套管部外侧，所述卡钩孔能与前套管部上的第一卡钩分别对应卡接；该笔壳前端部是套接于接合构件的套接端部外侧，该笔壳前端部设有多个凹洞，该套接端部外周面的多个凸块分别对位卡接于笔壳的凹洞而结合一起；该螺旋套管的结合端部的侧壁形成有多个卡孔以及二个对位凸部，该螺旋套管是对应连接于接合构件后端的后套管部与套接端部之间，该接合构件的第二卡钩卡接螺旋套管的卡孔中，该对位凸部分别对应置入于对位凹部中。
如上所述的注射笔中，该推杆的杆部前段形成多个扣制凹部；该螺旋导管的衔接壁后侧面形成一朝后凸伸的缩口环部；该推进杆的杆体邻近剂量控制段后端的部位形成多个自外周面径向连通杆孔的穿槽，每一该穿槽中分别形成一弹性扣钩，所述弹性扣钩凸出杆体的外周面，该弹性扣钩能被螺旋导管的缩口环部挤压而径向弯曲伸入杆孔内，该弹性扣钩能扣制于推杆的扣制凹部。
本发明可达成的有益功效是，该注射笔除通过螺旋导管的驱动螺旋导槽为大螺距行程构造与该推进杆的推进螺纹为小螺距行程构造的组合，将使用者直向按压注射操作构 件的力量转变为旋转力量，利用大螺距行程的旋转推力转换至小螺距行程的注射药剂推力，达到定量注射和省力的功效外。本发明注射笔还进一步利用设于推杆上的单向棘轮环的径向止逆弹片抵接于螺旋推进管的单向棘齿槽部中，约束推杆与螺旋推进管的旋转方向，推进杆受到接合构件非圆形导引孔的限制而无法转动，以及螺旋套管后端的轴向止逆弹片位于螺旋推进管的放行沟槽中，导引凸块位于长导槽中，使螺旋推进管仅能与注射操作构件一同朝前直向运动，在螺旋推进管外周面的螺旋导块与螺旋导管的驱动螺旋导槽的螺接配合而驱动螺旋导管顺向旋转，使螺旋推进管朝前推进后，通过螺旋套管的螺旋槽与螺旋推进管的配合而不可折返，直至螺旋推进管外周面的螺旋导块于螺旋导管的驱动螺旋导槽中完成行进一导程距离进行定量注射，且能确保注射笔的使用安全性。
本发明的注射笔使用至药剂瓶内的药剂正好用尽时，该注射笔还能进一步利用推进杆运动后的位置，足以使推进杆上的弹性扣钩受到螺旋导管的缩口环部的挤压，弹性扣钩径向弯曲而伸入推进杆内部，扣制推杆的扣制凹部加以制动锁定，使注射操作构件无法再被朝后拉动，避免该注射笔被过度重复使用，确保注射笔的使用安全性。
附图说明
以下附图仅旨在于对本发明做示意性说明和解释，并不限定本发明的范围。其中，
图1是本发明注射笔的一优选实施例与药剂瓶、针头及针头盖的立体分解示意图。
图2是图1所示注射笔优选实施例中的循环推进装置的立体分解示意图。
图3是图1所示注射笔优选实施例中的循环推进装置另一观视角度的立体分解示意图。
图4是图1至图3所示注射笔优选实施例结合药剂瓶的组合剖面示意图。
图5是图4的局部放大图。
图6是图4另一部分的局部放大图。
图7是图4及图5中剖切线A-A位置的侧视剖面示意图。
图8是图4及图6中剖切线B-B位置的侧视剖面示意图。
图9是图2及图3所示循环推进装置中的螺旋套管、螺旋推进管与推杆端盖的局部组合立体示意图。
图10是图2及图3所示循环推进装置中的螺旋套管、螺旋推进管与推杆端盖的另一局部组合立体示意图。
图11是本发明注射笔优选实施例组接药剂瓶，并装设针头与针头盖后，于朝后拉动注射操作构件的实施状态参考图。
图12是本发明注射笔优选实施例于朝前按压注射操作构件的实施状态参考图(一)。
图13是本发明注射笔优选实施例于朝前按压注射操作构件的实施状态参考图(二)。
图14是本发明注射笔优选实施例使用至药剂瓶内的药剂用尽时的实施状态参考图。
图15是本发明注射笔优选实施例使用至药剂瓶内的药剂用尽时，呈锁定状态的实施状态参考图(一)。
图16是本发明注射笔优选实施例使用至药剂瓶内的药剂用尽时，呈锁定状态的实施状态参考图(二)。
具体实施方式
以下配合附图及本发明的优选实施例，进一步阐述本发明为达成预定发明目的所采取的技术手段。
如图1所示，揭示本发明注射笔的一个优选实施例与药剂瓶3、针头4及针头盖5的立体分解示意图，该注射笔是结合药剂瓶3、针头4及针头盖5一起使用，该注射笔包含一循环推进装置1以及一药瓶套壳2，或者，该注射笔还包含一笔壳6以及一笔盖7。
如图1至图3所示，该循环推进装置1包含一接合构件10、一螺旋套管20、一螺旋导管30、一螺旋推进管40、一螺接套环50、一推进杆60、一单向棘轮环70以及一注射操作构件80，其中：
如图2至图6所示，该接合构件10中形成一内板部11以及一位于内板部11侧端的单向棘齿环槽12，该单向棘齿环槽12槽壁形成多个单斜向棘齿，内板部11中形成一非圆形的导引孔111，所述非圆形的导引孔111是一个具有至少一定位平面的多边形孔或具有二径向相对定位平面的穿孔或其它非圆形的穿孔。于本优选实施例中，该接合构件10包含一前套管部13、一后套管部14、一隔板部15以及一套接端部16，前套管部13与后套管部14分别形成于该隔板部15前、后侧，后套管部14的外部直径小于前套管部13的外部直径，套接端部16自隔板部15后侧朝后凸伸，套接端部16位于后套管部14外侧，该前套管部13是用以组接药瓶套壳2后端，且药剂瓶3能通过前套管部13内至后套管部14中，该内板部11及单向棘齿环槽12是成形于后套管部14的内周壁中。
于本优选实施例中，该接合构件10的前套管部13上形成多个第一卡钩131，用以 卡接药瓶套壳2，该接合构件10的隔板部15后侧面于套接端部16与后套管部14之间的空间中形成多个第二卡钩141，该套接端部16外周面形成多个凸块161，凸块161后端形成斜面，该套接端部16还设有二由后往前延伸的对位凹部162。
如图2至图6所示，该螺旋套管20是组接于接合构件10的后端，该螺旋套管20中形成一通孔前段21与一衔接通孔前段21后端的通孔后段22，该通孔前段21结合通孔后段22构成一前后轴向贯通螺旋套管20内部的通孔，通孔前段21的孔径大于通孔后段22的孔径，且于通孔后段22的内孔壁形成一螺旋槽23，该螺旋槽23具有一圈完整的螺旋导程，该螺旋套管20前端具有一结合端部24，该螺旋套管20后段周壁形成一轴向延伸且自其外周面径向连通通孔后段22的长导槽25，长导槽25连通螺旋槽23的前端与后端而形成一循环轨道，该螺旋套管20后端还形成一朝后凸伸的轴向止逆弹片26，轴向止逆弹片26后端为自由端，使轴向止逆弹片26具有上下摆动的弹性。
于本优选实施例中，该螺旋套管20的结合端部24的侧壁形成有多个卡孔241以及二个对位凸部242，该螺旋套管20是对应组接于接合构件10后端的后套管部14与套接端部16之间，接合构件10的第二卡钩141卡接螺旋套管20的卡孔241中，对位凸部242分别对应置入于对位凹部162中。
如图2至图6所示，该螺旋导管30包含有一管部31以及一形成于管部31前端的前管端部32，前管端部32的外部直径小于管部31的外部直径，且前管端部32与管部31间具有一衔接壁33，该管部31中形成一管孔311以及一形成于管孔311内孔壁的驱动螺旋导槽34，该驱动螺旋导槽34具有一圈完整的螺旋导程，该前管端部32外周面形成多个止逆棘齿弹片35，前管端部32中形成一前管孔321，前管端部32于前管孔321孔壁形成多个由前往后延伸的固定凹部322，衔接壁33中形成一管中孔331，前管孔321通过衔接壁33的管中孔331连通管部31的管孔311，该螺旋导管30是装设于螺旋套管20的通孔前段21中，螺旋导管30前管端部32伸出螺旋套管20前端外，前管端部32伸入接合构件10的后套管部14中，前管端部32外周面的止逆棘齿弹片35抵接于后套管部14的单向棘齿环槽12中的单斜向棘齿上，使螺旋导管30仅能单向旋转。于本优选实施例中，衔接壁33后侧面的管中孔331外围处形成一朝后凸伸的缩口环部36。
如图2至图6所示，该螺旋推进管40中具有一轴向贯通的中孔41，该螺旋推进管40于其前段的外周面形成一螺旋导块42，该螺旋推进管40中段的外周面形成一导引凸块43，螺旋推进管40的后段外周面形成一沿轴向延伸的放行沟槽44以及多个沿轴向等间距排列于放行沟槽44外围的逆止环凹纹45，该导引凸块43与放行沟槽44分别位于 螺旋推进管40径向相对的两侧，螺旋推进管40后段的中孔41内孔壁形成有一具有多个单斜向棘齿的单向棘齿槽部46。该螺旋推进管40组设于螺旋导管30与螺旋套管20中，螺旋导块42螺接螺旋导管30的驱动螺旋导槽34，该螺旋推进管40后段伸出螺旋导管30后端外，且伸出螺旋套管20的通孔后段22外，导引凸块43能于螺旋槽23与长导槽25构成的循环轨道中变换位置，螺旋推进管40能通过导引凸块43沿着该螺旋槽23螺旋前进或沿着长导槽25直线后退运动，螺旋套管20后端的轴向止逆弹片26能于放行沟槽44与逆止环凹纹45间变换位置。于本优选实施例中，该螺旋推进管40后端还形成一朝后凸伸且具有倒钩部的枢接端部47。
如图2至图6所示，该螺接套环50是固定于螺旋导管30的前管端部32的前管孔321中，螺接套环50中形成一螺孔51，于本优选实施例中，螺接套环50外周面形成多个固定凸块52，该多个固定凸块52分别对应置入于螺旋导管30的前管端部32的固定凹部322中定位。
如图2至图6所示，该推进杆60包含一杆体61，杆体61中具有一轴向贯通且非圆形的杆孔62，杆体61的断面形状对应于接合构件10的非圆形导引孔111，该杆体61前段为一外周面形成有推进螺纹631的剂量控制段63，推进螺纹631的螺距小于螺旋导管30的驱动螺旋导槽34的螺距，该剂量控制段63的断面形状是对应于接合构件10的导引孔111的非圆形，该杆体61邻近剂量控制段63后端部位形成一径向凸伸的凸缘632，该杆体61后端形成一径向凸伸的端缘。该推进杆60装设于螺旋推进管40内，推进杆60具有端缘的后端伸出螺旋推进管40后端外，具有推进螺纹631的剂量控制段63螺设于螺接套环50的螺孔51中且对应通过接合构件10的导引孔111。
如图2至图6所示，该推进杆60的前端可直接作为推抵药剂瓶3内部的活塞3A的部位，或者，如本优选实施例中，该推进杆60还包含一杆端部件65，杆端部件65固定于杆体61前端，以杆端部件65作为推抵药剂瓶3内部的活塞3A的部件。该杆端部件65包含一推抵端部651、一形成于推抵端部651后端的套合部652以及多个位于套合部652内的卡钩653，杆端部件65以其套合部652套接于杆体61前端，卡钩653通过杆体61的杆孔62前段而卡接于钩孔613中，使杆端部件65固定于杆体61前端，杆端部件65位于接合构件10的内板部11前方。
于本优选实施例中，该推进杆60的杆体61后段邻近剂量控制段63的部位形成多个自外周面径向连通杆孔62的穿槽611，每一穿槽611中分别形成一弹性扣钩612，所述弹性扣钩612凸出杆体61的外周面，且弹性扣钩612能被螺旋导管30的缩口环部36 挤压而径向弯曲伸入杆孔62内。该杆体61后端还可于杆孔62孔壁形成多个凹部，该杆体61的剂量控制段63前端设有多个钩孔613，钩孔613自杆体61外周面径向连通杆孔62。
如图2至图4及图6所示，该单向棘轮环70包含一环部71以及形成于环部71外周面的多个单斜向的径向止逆弹片72。该环部71中形成一内孔711，该内孔711为对应于推进杆60的杆孔62的非圆形孔。该单向棘轮环70装设于螺旋推进管40的单向棘齿槽部46中，且位于推进杆60后方，该单向棘轮环70的每一径向止逆弹片72分别抵接于单向棘齿槽部46的单斜向棘齿上。于本优选实施例中，该环部71前端形成多个扣钩73，该多个扣钩73能分别对应伸入推进杆60杆体61后端的杆孔62内的凹部。
如图2至图6所示，该注射操作构件80包含一推杆81以及一推杆端盖82，该推杆81包含一杆部811以及一成形于杆部811后端的组接端部812，该杆部811为一断面形状为非圆形的长条形部件，且杆部811的断面形状对应于推进杆60的非圆形杆孔62形状，该杆部811后段形成多个定位凹部813，该组接端部812具有径向凸伸的凸缘。该推杆81的杆部811伸入螺旋套管20后端、螺旋推进管40后端、单向棘轮环70的内孔711至推进杆60的杆孔62中，单向棘轮环70以扣钩73分别对应扣合于杆部811的定位凹部813中，使单向棘轮环70固定于推杆81的杆部811上。该推杆端盖82位于螺旋套管20后端，该推杆81后端的组接端部812以及螺旋推进管40后端的枢接端部47一同组设于推杆端盖82中，螺旋推进管40能于推杆端盖82中旋转。
于本优选实施例中，该推杆81的杆部811前段还形成多个扣制凹部814，以扣制凹部814提供推进杆60的弹性扣钩612扣制锁定的部位。该推杆端盖82包含有一端盖本体821以及一盖体822，端盖本体821中具有一组接孔，推杆81后端的组接端部812以及螺旋推进管40后端的枢接端部47一同穿设于端盖本体821的组接孔中，盖体822盖合于端盖本体821后端。
如图1至图4所示，该药瓶套壳2是用以提供一药剂瓶3装设其中，药瓶套壳2前端能组接一针头4，并使该针头4能通过药瓶套壳2前端而伸入药剂瓶3内。该药瓶套壳2后端能组接于接合构件10前端，于本优选实施例中，该药瓶套壳2后端具有一结合部2A，结合部2A上形成多个卡钩孔2B，该结合部2A能套接于接合构件10的前套管部13外侧，所述卡钩孔2B能与前套管部13上的第一卡钩131分别对应卡接。
如图1至图3所示，该笔壳6是一前后轴向贯通的部件，该笔壳6能套设于螺旋套管20外侧，且组接于接合构件10的后端，螺旋推进管40的枢接端部47与推杆81后 端的组接端部812伸出笔壳6后端外侧再组接推杆端盖82。于本优选实施例中，该笔壳6前端部是套接于接合构件10的套接端部16外侧，该笔壳6前端部设有多个凹洞6A，套接端部16外周面的多个凸块161分别对位卡接于笔壳6的凹洞6A而结合一起。如图1及图5所示，该笔盖7是可拆组地套设于药瓶套壳2外侧。
如图1、图4及图5所示，本发明注射笔组装药剂瓶3时，是在药瓶套壳2还未组接循环推进装置1之前，将药剂瓶3后端伸入接合构件10的前套管部13中，推进杆60前端的杆端部件65伸入药剂瓶3后端内部抵接活塞3A，再将药瓶套壳2套设于药剂瓶3外侧，以药瓶套壳2后端的结合部2A套接于接合构件10前端的前套管部13外侧，其中，通过该药瓶套壳2后端结合部2A上所设的多个卡钩孔2B与接合构件10的前套管部13上的第一卡钩131分别对应卡接而固定，该药瓶套壳2后端的结合部2A外侧还可结合一固定套环2C，使药瓶套壳2与接合构件10稳固地结合一起。该注射笔未装设针头进行注射时，使用者可先将笔盖7套设于药瓶套壳2外侧。
如图4及图11、图7及图8所示，当使用者于使用该装有药剂瓶3的注射笔时，于注射前准备，先取下笔盖7，将针头4装设于药瓶套壳2前端，针头4穿过药瓶套壳2前端且刺入药剂瓶3内，此时，可先将针头盖5罩盖于针头4外侧，避免使用者被针头4误刺。准备注射时，将该循环推进装置1的注射操作构件80沿轴向朝后直向拉动至预备位置。在前述将注射操作构件80往后拉动的过程中，一并带动螺旋推进管40朝后运动，且螺旋推进管40同时于螺旋套管20与螺旋导管30内部空转，又利用固设于推杆81上的单向棘轮环70的径向止逆弹片72抵接于螺旋推进管40的单向棘齿槽部46中，以及螺旋导管30前管端部32的止逆棘齿弹片35抵接于接合构件10的单向棘齿环槽12中，约束推杆81与螺旋推进管40的旋转方向，使螺旋推进管40仅能单向转出。如图9所示，同时螺旋套管20后端的轴向止逆弹片26于螺旋推进管40的逆止环凹纹45处弹跳而发生响声，并利用螺旋推进管40的逆止环凹纹45对螺旋套管20后端的轴向止逆弹片26的限位，而能产生阻止注射操作构件80被误按压而驱动螺旋推进管40沿轴向朝前运动的功能，确保注射操作构件80朝后拉出的过程中，不会被误压而回缩。直至螺旋推进管40旋转满一圈时，如图10所示，螺旋套管20的轴向逆止弹片26进入螺旋推进管40的放行沟槽44后，解除对轴向逆止弹片26的约制。
如图11所示，于注射时，取下针头盖5，以针头4刺入人体预定注射部位，再按压注射操作构件80开始注射时，如图12及图13所示，注射操作构件80的推杆端盖82被施以朝前的按压力量，而使注射操作构件80直线运动，且螺旋推进管40一并被推动 向前运动，其中，设于推杆81上的单向棘轮环70的径向止逆弹片72抵接于螺旋推进管40的单向棘齿槽部46中，约束推杆81与螺旋推进管40的旋转方向，且推进杆60受到接合构件10非圆形导引孔111的限制而无法转动，以及螺旋套管20后端的轴向止逆弹片26位于螺旋推进管40的放行沟槽44中(如图10所示)，导引凸块43位于长导槽25中，使螺旋推进管40仅能与注射操作构件80一同朝前直向运动，在螺旋推进管40外周面的螺旋导块42与螺旋导管30的驱动螺旋导槽34的螺接配合而驱动螺旋导管30顺向旋转。螺旋推进管40朝前推进后，通过螺旋套管20的螺旋槽23与螺旋推进管40的配合而不可折返。直至螺旋推进管40外周面的螺旋导块42于螺旋导管30的驱动螺旋导槽34中完成行进一导程距离(即完整导程一圈)，螺旋导管30因被螺旋推进管40推动而顺向旋转一圈，同时一并带动螺旋导管30前端内部的螺接套环50旋转一圈，进而利用螺接套环50带动推进杆60直线往前行进一预设的距离，并通过推进杆60前端推动药剂瓶3内的活塞3A往前运动而将一定量的药剂注入人体中，使该注射笔具备固定剂量注射的使用功能。同时，通过螺旋导管30的驱动螺旋导槽34为大螺距行程构造与该推进杆60的推进螺纹631为小螺距行程构造的组合，将使用者直向按压注射操作构件80的力量转变为旋转力量，并利用大螺距行程的旋转推力转换至小螺距行程的注射药剂推力，达到省力的功效。
如上所述，该注射笔能重复使用至药剂瓶3中的药剂用完为止。当装设于注射笔内的药剂瓶3内的药剂用完时，该注射笔即须丢弃。如图14至图16所示，当该注射笔使用至药剂瓶3内的药剂正好用尽时，该注射笔中的推进杆60运动后的位置，足以使推进杆60上的弹性扣钩612受到螺旋导管30的缩口环部36的挤压，弹性扣钩612径向弯曲而伸入推进杆60内部，并扣制推杆81的扣制凹部814加以制动锁定，使注射操作构件80无法再被朝后拉动，避免该注射笔被过度重复使用，确保注射笔的使用安全性。
以上所述仅是本发明的优选实施例而已，并非对本发明做任何形式上的限制，虽然本发明已以优选实施例揭露如上，然而并非用以限定本发明，任何熟悉本专业的技术人员，在不脱离本发明技术方案的范围内，当可利用上述揭示的技术内容作出些许更动或修饰为等同变化的等效实施例，但凡是未脱离本发明技术方案的内容，依据本发明的技术实质对以上实施例所作的任何简单修改、等同变化与修饰，均仍属于本发明技术方案的范围内。

Claims (9)

  1. 一种注射笔，其包含一循环推进装置以及一药瓶套壳，该药瓶套壳能将一药剂瓶连接于该循环推进装置前端，其特征在于，该循环推进装置包含：
    一接合构件，其内部具有一内板部以及一位于内板部侧端的单向棘齿环槽，该单向棘齿环槽槽壁形成多个单斜向棘齿，该内板部中形成一非圆形的导引孔，该接合构件前端连接该药瓶套壳后端；
    一螺旋套管，其连接于接合构件的后端，该螺旋套管中形成一通孔前段与一衔接通孔前段后端的通孔后段，于该通孔后段的内孔壁形成一螺旋槽，该螺旋套管前端具有一结合端部，该螺旋套管后段周壁形成一轴向延伸且自其外周面径向连通通孔后段的长导槽，该长导槽连通螺旋槽的前端与后端而形成一循环轨道，该螺旋套管后端形成一朝后凸伸的轴向止逆弹片；
    一螺旋导管，其包含一管部、一位于管部前端的前管端部以及一位于前管端部与管部之间的衔接壁，该管部内形成一驱动螺旋导槽，该前管端部外周面形成多个止逆棘齿弹片，该螺旋导管装设于螺旋套管的通孔前段内，该螺旋导管的前管端部通过螺旋套管前端而伸入接合构件的后套管部中，该前管端部外周面的止逆棘齿弹片抵接于后套管部的单向棘齿环槽中的单斜向棘齿上，使螺旋导管能单向旋转；
    一螺旋推进管，其具有一轴向贯通的中孔，该螺旋推进管前段的外周面形成一螺旋导块，该螺旋推进管中段的外周面形成一导引凸块，该螺旋推进管后段的外周面形成一沿轴向延伸的放行沟槽以及沿轴向等间距排列的逆止环凹纹，该导引凸块与放行沟槽分别位于螺旋推进管径向相对的两侧，该螺旋推进管后段的中孔内孔壁形成有一具有多个单斜向棘齿的单向棘齿槽部，该螺旋推进管连接于螺旋导管与螺旋套管中，该螺旋导块螺接螺旋导管的驱动螺旋导槽，该螺旋推进管后段通过螺旋导管后端及螺旋套管后端外，该导引凸块能于螺旋槽与长导槽构成的循环轨道中变换位置，该螺旋推进管的导引凸块能沿着螺旋槽螺旋前进或沿着长导槽直线后退，该螺旋套管后端的轴向止逆弹片能于该螺旋推进管的放行沟槽与逆止环凹纹之间变换位置；
    一螺接套环，其固设于螺旋导管的前管端部中，该螺接套环中形成一螺孔；
    一推进杆，其包含一内有非圆形杆孔的杆体，该杆体的断面形状对应于接合构件的非圆形导引孔，该杆体前段为一外周面形成有推进螺纹的剂量控制段，该推进螺纹的螺距小于螺旋导管的驱动螺旋导槽的螺距，该推进杆装设于螺旋推进管内，该推进杆具 有推进螺纹的剂量控制段螺设于螺接套环的螺孔中，该推进杆能直线运动地穿过接合构件的导引孔；
    一单向棘轮环，其包含一环部以及形成于环部外周面的多个单斜向的径向止逆弹片，该单向棘轮环装设于螺旋推进管的单向棘齿槽部内且位于推进杆后方，该单向棘轮环的径向止逆弹片抵接于单向棘齿槽部的单斜向棘齿上；以及
    一注射操作构件，其包含一推杆以及一推杆端盖，该推杆能轴向直线运动地伸入螺旋套管及位于螺旋套管内部的螺旋推进管至推进杆的杆孔内部，装设于螺旋推进管内的单向棘轮环套设固定于推杆上，该推杆端盖位于螺旋套管后端且连接推杆的后端，该螺旋推进管后端能旋转地连接于推杆端盖中。
  2. 根据权利要求1所述的注射笔，其特征在于，该螺旋导管的前管端部的外部直径小于管部的外部直径，该管部中形成一管孔，该驱动螺旋导槽形成于管孔内孔壁，该前管端部外周面形成多个止逆棘齿弹片，该前管端部中形成一前管孔，该衔接壁中形成一管中孔，该前管孔通过衔接壁的管中孔连通管部的管孔，该前管端部于前管孔孔壁形成多个由前往后延伸的固定凹部，该螺接套环外周面形成多个固定凸块，该多个固定凸块分别对应置入于螺旋导管的前管端部的固定凹部中定位。
  3. 根据权利要求1所述的注射笔，其特征在于，该推进杆的杆体后端于杆孔孔壁形成多个凹部，该单向棘轮环的环部前端形成多个扣钩，该多个扣钩能分别对应伸入推进杆后端的杆孔内的凹部中；该螺旋推进管后端形成一朝后凸伸且具有倒钩部的枢接端部；该推杆后端为一具有凸缘的组接端部；该推杆端盖包含有一端盖本体以及一盖体，该端盖本体中具有一组接孔，该推杆后端的组接端部以及螺旋推进管后端的枢接端部一同穿设于端盖本体的组接孔中，该盖体盖合于端盖本体后端。
  4. 根据权利要求1所述的注射笔，其特征在于，该推进杆于杆体的剂量控制段前端设有多个钩孔，所述钩孔自杆体外周面径向连通杆孔；该推进杆于杆体前端设有一杆端部件，该杆端部件包含一推抵端部、一形成于推抵端部后端的套合部以及多个位于套合部内的卡钩，该杆端部件以其套合部套接于杆体前端，该卡钩通过杆体的杆孔前段而卡接于钩孔中而固定，该杆端部件位于接合构件的内板部前方。
  5. 根据权利要求1所述的注射笔，其特征在于，该螺旋导管的前管端部的外部直径小于管部的外部直径，该前管端部与管部间具有一衔接壁，该管部中形成一管孔，该驱动螺旋导槽形成于管孔内孔壁，该前管端部外周面形成多个止逆棘齿弹片，该前管端部中形成一前管孔，该衔接壁中形成一管中孔，该前管孔通过衔接壁的管中孔连通管 部的管孔，该前管端部于前管孔孔壁形成多个由前往后延伸的固定凹部，该螺接套环外周面形成多个固定凸块，该多个固定凸块分别对应置入于螺旋导管的前管端部的固定凹部中定位；
    该推进杆的杆体后端于杆孔孔壁形成多个凹部，该单向棘轮环的环部前端形成多个扣钩，该多个扣钩能分别对应伸入推进杆后端的杆孔内的凹部中；该螺旋推进管后端形成一朝后凸伸且具有倒钩部的枢接端部；该推杆后端为一具有凸缘的组接端部；该推杆端盖包含有一端盖本体以及一盖体，该端盖本体中具有一组接孔，该推杆后端的组接端部以及螺旋推进管后端的枢接端部一同穿设于端盖本体的组接孔中，该盖体盖合于端盖本体后端；
    该推进杆于杆体的剂量控制段前端设有多个钩孔，所述钩孔自杆体外周面径向连通杆孔；该推进杆于杆体前端设有一杆端部件，该杆端部件包含一推抵端部、一形成于推抵端部后端的套合部以及多个位于套合部内的卡钩，该杆端部件以其套合部套接于杆体前端，该卡钩通过杆体的杆孔前段而卡接于钩孔中而固定，该杆端部件位于接合构件的内板部前方。
  6. 根据权利要求1至5中任一项所述的注射笔，其特征在于，该推杆的杆部前段形成多个扣制凹部；该螺旋导管的衔接壁后侧面形成一朝后凸伸的缩口环部；该推进杆的杆体邻近剂量控制段后端的部位形成多个自外周面径向连通杆孔的穿槽，每一该穿槽中分别形成一弹性扣钩，所述弹性扣钩凸出杆体的外周面，该弹性扣钩能被螺旋导管的缩口环部挤压而径向弯曲伸入杆孔内，该弹性扣钩能扣制于推杆的扣制凹部。
  7. 根据权利要求1至5中任一项所述的注射笔，其特征在于，该注射笔还包含一笔壳以及一笔盖，该笔壳是一前后轴向贯通的部件，该笔壳套设于螺旋套管外侧，该笔壳连接于接合构件的后端，该螺旋推进管后端的枢接端部与推杆后端的组接端部分别伸出笔壳后端外侧且连接推杆端盖；该笔盖是能拆组地套设于药瓶套壳外侧。
  8. 根据权利要求7所述的注射笔，其特征在于，该接合构件包含一前套管部、一后套管部、一隔板部以及一套接端部，该前套管部与后套管部分别形成于该隔板部前、后侧，该后套管部的外部直径小于前套管部的外部直径，该套接端部自隔板部后侧朝后凸伸，该套接端部位于后套管部外侧，该前套管部上形成多个第一卡钩，该套接端部外周面形成多个凸块，所述凸块后端形成斜面，该隔板部后侧面于套接端部与后套管部之间的空间中形成多个第二卡钩，该套接端部设有二由后往前延伸的对位凹部；
    该药瓶套壳端具有一结合部，该结合部上形成多个卡钩孔，该结合部能套接于接 合构件的前套管部外侧，所述卡钩孔能与前套管部上的第一卡钩分别对应卡接；
    该笔壳前端部是套接于接合构件的套接端部外侧，该笔壳前端部设有多个凹洞，该套接端部外周面的多个凸块分别对位卡接于笔壳的凹洞而结合一起；
    该螺旋套管的结合端部的侧壁形成有多个卡孔以及二个对位凸部，该螺旋套管是对应连接于接合构件后端的后套管部与套接端部之间，该接合构件的第二卡钩卡接螺旋套管的卡孔中，该对位凸部分别对应置入于对位凹部中。
  9. 根据权利要求8所述的注射笔，其特征在于，该推杆的杆部前段形成多个扣制凹部；该螺旋导管的衔接壁后侧面形成一朝后凸伸的缩口环部；该推进杆的杆体邻近剂量控制段后端的部位形成多个自外周面径向连通杆孔的穿槽，每一该穿槽中分别形成一弹性扣钩，所述弹性扣钩凸出杆体的外周面，该弹性扣钩能被螺旋导管的缩口环部挤压而径向弯曲伸入杆孔内，该弹性扣钩能扣制于推杆的扣制凹部。
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