WO2016155417A1 - 注射笔的锁定构造 - Google Patents

注射笔的锁定构造 Download PDF

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Publication number
WO2016155417A1
WO2016155417A1 PCT/CN2016/073529 CN2016073529W WO2016155417A1 WO 2016155417 A1 WO2016155417 A1 WO 2016155417A1 CN 2016073529 W CN2016073529 W CN 2016073529W WO 2016155417 A1 WO2016155417 A1 WO 2016155417A1
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WO
WIPO (PCT)
Prior art keywords
push rod
rod
spiral
injection pen
tube
Prior art date
Application number
PCT/CN2016/073529
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 EP16771172.0A priority Critical patent/EP3278826B1/en
Priority to JP2017549223A priority patent/JP6429161B2/ja
Priority to US15/561,554 priority patent/US20180085536A1/en
Priority to KR1020177029525A priority patent/KR102100546B1/ko
Publication of WO2016155417A1 publication Critical patent/WO2016155417A1/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
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • A61M5/5013—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe
    • A61M5/502—Means for blocking the piston or the fluid passageway to prevent illegal refilling of a syringe for blocking the piston
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • 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
    • 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
    • A61M5/31533—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
    • A61M5/50—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for preventing re-use, or for indicating if defective, used, tampered with or unsterile
    • 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

Definitions

  • the present invention relates to a pen-shaped syringe, and more particularly to a locking structure that automatically locks and locks when the medicament is used up, so that the injection pen cannot be reused.
  • the existing injection pen has two types: a metering type pen and a counting type pen.
  • a metering type pen After the metering type injection pen is assembled, 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.
  • the needle Pre-dose the 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 the combination of the large pitch stroke structure and the small pitch stroke structure, and converts the force of the user's push rod pressing the injection pen to the rotational force, and utilizes the large The rotary thrust of the pitch stroke is converted to the injection torque of the small pitch stroke to achieve the effect of quantitative injection and labor saving.
  • the aforementioned injection pen can achieve the expected quantitative injection and labor saving effects, however, after the injection pen is used in the medicine bottle, the driving mechanism in the injection pen can still operate, and is not locked, so that the user may continue Misuse, but there is a problem of insufficient security.
  • the technical problem to be solved by the present invention is to provide a locking structure of an injection pen, which can solve the problem that the circulating propulsion device in the injection pen can still be operated after the medicine of the existing injection pen in the medicine bottle is used up, and cannot be locked, resulting in The problem of insufficient security that users may continue to misuse.
  • the technical solution proposed by the present invention is to provide a locking structure of an injection pen, which is disposed between a spiral conduit, a push rod and a push rod of the circulation propulsion device of the injection pen, and the push rod has a dose with a propulsion thread
  • the control section is disposed in the hole in the tube of the connecting wall in the spiral conduit, and the push rod is disposed in the rod hole of the push rod with the rod portion thereof, wherein the locking structure comprises:
  • a constricted ring portion is formed on the rear side of the connecting wall in the spiral conduit and located at the periphery of the hole in the tube;
  • At least one buckle recess is formed in a front portion of the stem of the push rod
  • the at least one elastic hook is formed at a rear end of the push rod adjacent to the dose control section, and the push rod is provided with a through slot around the elastic hook, the through slot is a rod hole radially communicating with the outer peripheral surface of the push rod.
  • the crimping ring portion of the spiral conduit can press the elastic clasp, and the elastic clasp can be bent radially into the rod hole and buckled in the buckle recess of the push rod for braking and locking.
  • the front portion of the rod portion of the push rod forms two radial corresponding buckle recesses, and the push rods form two radial corresponding elastic hooks, and the two elastic hooks respectively correspond to
  • the action path of the recessed portion is described in the two.
  • the beneficial effect that can be achieved by the present invention is that the locking structure is applied to the injection pen, and when the injection pen is used up to the medicine in the medicine bottle, the injection pen can further utilize the position after the movement of the push rod, which is sufficient
  • the elastic buckle on the push rod is squeezed by the shrink ring of the spiral conduit, and the elastic buckle is bent radially to extend into the interior of the push rod, and the buckled recess of the push rod is braked and locked, so that the push pen is pushed The rod can no longer be pulled back, avoiding the pen being overused and ensuring the safety of the pen.
  • the present invention may further form two radial corresponding buckle recesses in the front portion of the rod portion of the push rod, and two radial corresponding elastic hooks are formed on the push rod, and the two elastic hooks respectively correspond to the two buckles.
  • the action path of the recessed portion achieves a better clamping and locking effect by virtue of the use of the two elastic hooks to radially buckle the recessed portion of the push rod.
  • Fig. 1 is a perspective exploded view showing the constitution of an injection pen.
  • FIG. 2 is a perspective exploded view showing the locking structure of the present invention applied to the circulation propulsion device of the injection pen shown in FIG. 1.
  • FIGS. 1 and 2 are schematic cross-sectional views showing the combination of the injection pen and the pharmaceutical bottle shown in FIGS. 1 and 2.
  • Fig. 4 is a partial enlarged view of Fig. 3;
  • Figure 5 is a partial enlarged view of another portion of Figure 3.
  • Figure 6 is a cross-sectional side elevational view showing the position of the face line A-A of Figures 3 and 4.
  • Figure 7 is a cross-sectional side elevational view of the position of the cut line B-B of Figures 3 and 5.
  • Fig. 8 is a perspective view, partly in perspective, of the spiral bushing, the screw propulsion pipe and the push rod end cover in the circulating propulsion device shown in Fig. 2.
  • Figure 9 is a perspective view showing another partial combination of the spiral sleeve, the screw advancement tube and the push rod end cover in the circulation propulsion device shown in Figure 2.
  • Figure 10 is a perspective exploded perspective view showing the locking structure of the present invention applied to the spiral conduit, the propeller rod and the push rod of the circulation propulsion device shown in Figure 2;
  • Figure 11 is a partial cross-sectional view showing the locking structure of the present invention applied to the injection pen shown in Figures 1 and 2.
  • Fig. 12 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. 13 is a view (1) showing 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 (2) showing an embodiment of the preferred embodiment of the injection pen of the present invention for pressing the injection operation member forward.
  • Fig. 15 is a view showing the state of implementation of a preferred embodiment of the injection pen of the present invention when the medicament used in the medicament bottle is used up.
  • Fig. 16 is a view showing a 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.
  • the locking structure of the injection pen of the present invention is arranged in a circulation propulsion device of an injection pen.
  • the injection pen is combined with a medicine bottle casing 2 for assembling the medicine bottle 3 by the circulation propulsion device 1 .
  • the needle 4 and the needle cover 5 are used together.
  • the composition of the circulation 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, and a push rod 60.
  • a one-way ratchet ring 70 and an injection operating member 80, the injection pen can further add a shell 6 and a cover 7.
  • the engaging member 10 has a guiding hole 11 and a one-way ratchet ring groove 12 therein.
  • the guiding hole 11 is a non-circular hole having a positioning plane, such as a polygon.
  • a hole, a through hole having two diametrically opposite positioning planes the front end of the spiral sleeve 20 is assembled to the rear end of the joint member 10, and the rear portion of the spiral sleeve 20 is provided with an inner spiral groove 23 and a long guide groove.
  • the end of the spiral sleeve 20 has an axial anti-back spring 26, which is mounted inside the front section of the spiral sleeve 20.
  • the front end of the spiral duct 30 extends through the front end of the spiral sleeve 20.
  • the spiral conduit 30 Inside the joint member 10, the spiral conduit 30 has a connecting wall 33 with a middle hole 331 therein and a driving spiral guide 34 on the outer side of the connecting wall 33.
  • the outer peripheral surface of the front end of the spiral conduit 30 has a check ratcheting piece 35.
  • the spiral tube 30 can be unidirectionally rotated by the abutment ratchet ring 35 abutting against the one-way ratchet ring groove 12 of the joint member 10.
  • the spiral propulsion tube 40 is mounted in the spiral conduit 30 and the spiral sleeve 20, and the spiral propulsion tube 40 is movable between the spiral conduit 30 and the spiral sleeve 20.
  • the outer peripheral mask of the spiral propulsion tube 40 has a spiral guide block. 42.
  • the spiral guide block 42 can be screwed to the driving spiral guide groove 34 of the spiral conduit 30,
  • a guiding protrusion 43 is formed on the outer peripheral surface of the middle portion of the spiral propelling tube 40.
  • the outer peripheral surface of the rear portion of the spiral propelling tube 40 forms an axially extending release groove 44 and the axial direction.
  • the check ring 43 is spaced apart, and the guiding protrusion 43 and the releasing groove 44 are respectively located on two opposite sides of the spiral propelling tube 40, and the inside of the rear part of the spiral propelling tube 40 has a one-way ratchet groove portion 46.
  • the rear portion of the spiral propulsion tube 40 extends beyond the rear end of the spiral sleeve 20.
  • the guide projection 43 can be formed in the spiral groove 23 and the long guide groove 25 in the spiral sleeve 20.
  • the guiding protrusion of the spiral propelling tube 40 can be spirally advanced along the spiral groove 23 and receding backward along the long guiding groove 25, and the axial anti-backing elastic piece 26 at the rear end of the spiral sleeve 20 can The position between the release groove 44 of the auger tube 40 and the check ring groove 45 is changed.
  • the propulsion rod 60 has a rod body 61 and a rod end member disposed at the front end of the rod body 61. 65.
  • the cross-sectional shape of the rod body 61 corresponds to the non-circular shape of the guiding hole 11 of the joint member 10, and an axially penetrating rod hole 62 is formed in the rod body 61.
  • the front portion of the rod body 61 is a dose control section 63 having the advancing thread 631, and is advanced.
  • the pitch of the thread 631 is smaller than the pitch of the driving spiral groove 34.
  • the front end of the rod body 61 is provided with a hole 613, and the rod end piece 65 provided at the front end of the rod body 61 is fastened to the card hole 613.
  • the push rod 60 is mounted in the auger tube 40.
  • the push rod 60 has a dose control section 63 of the advancement thread 631 through the tube center hole 331 of the connecting wall 33 of the spiral conduit 30, and the screw provided on the screw collar 50.
  • the push rod 60 is linearly movable in the hole 51 and corresponding to the non-circular guide hole 11 passing through the joint member 10.
  • the one-way ratchet ring 70 is disposed in the auger tube 40 and is located behind the propulsion rod 60.
  • the one-way ratchet ring 70 has a radial anti-revolution spring 72 on the outer circumferential surface of the ring portion 71, as shown in FIG.
  • the radial anti-back spring piece 72 abuts against the one-way ratchet groove portion 46 of the auger tube 40.
  • the injection operating member 80 includes a push rod 81 and a push rod end cover 82 that is disposed at the rear end of the push rod 81.
  • the push rod 81 extends into the rear end of the spiral sleeve 20 with a non-circular rod portion 811.
  • the rear end of the spiral propulsion tube 40 passes through the inside of the one-way ratchet ring 70 into the rod hole 62 of the push rod 60.
  • the one-way ratchet ring 70 is fixed to the rod portion 811 of the push rod 81, and the rod of the push rod 60 is
  • the hole 62 and the rod portion 811 of the push rod 81 are non-circular, so that the push rod 81 can only move linearly.
  • the rear end of the push rod 81 and the rear end of the screw propeller tube 40 are extended together with the spiral sleeve 20 and are assembled on the push rod 81.
  • the cover body 822 is further closed to the rear end of the end cap body 821, and the screw propeller tube 40 can be rotated in the push rod end cover 82.
  • the vial case 2 can fix a drug bottle 3 to the front end of the circulation propulsion device 1, and the rod end member 65 at the front end of the push rod 60 abuts against the piston in the drug bottle 3.
  • the front end of the vial case 2 can be combined with a needle 4 which can be inserted into the vial 3 through the front end of the vial case 2.
  • the pen case 6 is assembled at the rear end of the engaging member 10 and sleeved on the outer side of the spiral sleeve 20, and the rear end of the screw advancing tube 40 and the rear end of the push rod 81 extend beyond the rear end of the pen case 6 to assemble the push rod end cover. 82.
  • the pen cover 7 is detachably assembled on the outer side of the vial casing 2.
  • the locking structure of the injection pen of the present invention comprises a constricted ring portion 36, at least one deduction recess 814 and at least one elastic clasp 612, wherein:
  • the constricted ring portion 36 is formed on the rear side of the engaging wall 33 in the spiral conduit 30 and is located at the periphery of the hole 331 in the tube.
  • the buckle recess 814 is formed in front of the rod portion 811 of the push rod 81.
  • two radially corresponding deduction recesses 814 are formed in the front section of the stem portion 811 of the push rod 81.
  • the elastic hook 612 is formed on the rear end of the push rod 60 adjacent to the dose control section 63.
  • the push rod 60 is provided with a through slot 611 around the elastic hook 612.
  • the through slot 611 is radially outward of the outer peripheral surface of the push rod 60.
  • the elastic hook 612 formed in the through slot 611 can be pressed by the narrowing ring portion 36 of the spiral conduit 30 to be radially bent into the rod hole 62, and the elastic hook 612 can be buckled.
  • the buckle recess 814 of the push rod 81 is brake-locked.
  • two radial corresponding elastic hooks 612 are formed on the push rod 60, and the two elastic hooks 612 respectively correspond to the action paths of the two fastening recesses 814 of the push rod 81.
  • the medicine bottle 3 is attached to the front end of the joint member 10, and the rod end member 65 at the front end of the push rod 60 is inserted into the rear end of the medicine bottle 3 to abut.
  • the piston is further sleeved on the outer side of the medicine bottle 3, and the rear end of the medicine bottle casing 2 is coupled to the front end of the joint member 10 by a fixing collar 2C.
  • the pen cover 7 is first sleeved on the outside of the vial casing 2.
  • the pen cover 7 is removed, and the needle 4 is attached to the front end of the vial casing 2 and penetrated into the drug bottle 3, after which the needle cover 5 is covered first.
  • the user is prevented from being mistakenly stabbed by the needle 4.
  • the injection operation member 80 of the circulation propulsion device 1 is pulled straight in the axial direction to the preparatory position.
  • the auger tube 40 is driven to move backwards, and the auger tube 40 is simultaneously idling inside the spiral sleeve 20 and the spiral conduit 30, and the single set on the push rod 81 is utilized.
  • the radial anti-reciprocal elastic piece 72 of the ratchet ring 70 abuts against the one-way ratchet groove portion 46 of the auger tube 40, and the anti-reverse ratchet elastic piece 35 at the front end of the spiral catheter 30 abuts against the one-way ratchet of the engaging member 10.
  • the direction of rotation of the push rod 81 and the auger tube 40 is restricted, so that the auger tube 40 can be rotated 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 back-stop ring of the spiral propulsion tube 40.
  • 45 pairs of the axial anti-back springs 26 at the rear end of the spiral sleeve 20 can be configured to prevent the injection operation member 80 from being erroneously pressed to drive the spiral propulsion tube 40 to move forward in the axial direction, ensuring that the injection operation member 80 faces During the process of pulling out, it will not be retracted and retracted. Until the spiral propulsion tube 40 rotates one full turn, as shown in FIG. 9, the axial direction of the spiral sleeve 20 is reversed to enter the elastic piece 26 After the release groove 44 of the auger tube 40, the contraction of the axially reversed spring piece 26 is released.
  • the needle cover 5 is removed, the needle 4 is inserted into the predetermined injection site of the human body, and the injection operation member 80 is pressed to start the injection.
  • the injection operation member 80 is applied by the push rod end cover 82.
  • the linear propulsion tube 40 is linearly moved forward by the pressing force, and the radial thrust tube 72 of the one-way ratchet ring 70 provided on the push rod 81 abuts against the auger tube 40.
  • the rotation direction of the push rod 81 and the screw advance tube 40 is restrained, and the push rod 60 is restricted by the non-circular guide hole 11 of the joint member 10, and cannot be rotated, and the spiral sleeve 20 is behind.
  • the axial end stop spring 26 of the end is located in the release groove 44 of the auger tube 40 (as shown in FIG. 9), and the guide protrusion 43 is located in the long guide groove 25, so that the screw advance tube 40 can only be combined with the injection operation member 80.
  • the helical guide 42 on the outer circumferential surface of the auger tube 40 is screwed into the drive helical guide 34 of the spiral conduit 30 to drive the helical conduit 30 to rotate in the forward direction.
  • the auger tube 40 After the auger tube 40 is advanced forward, it cannot be folded back by the cooperation of the spiral groove 23 of the spiral sleeve 20 and the screw advancement tube 40. Until 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.
  • the rotary thrust of the large pitch stroke is used to convert the injection thrust of the small pitch stroke.
  • the locking structure of the present invention functions as its brake lock, wherein the push rod 60 in the injection pen is used.
  • the position after the movement is sufficient for the elastic clasp 612 on the push rod 60 to be squeezed by the constricted ring portion 36 of the spiral duct 30, and the elastic clasp 612 is radially bent to extend into the push rod 60, and the push rod is buckled.
  • the buckle recess 814 of the 81 is brake-locked so that the injection operation member 80 can no longer be pulled backward, preventing the injection pen from being overused, and ensuring the safety of use of the injection pen.

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  • Health & Medical Sciences (AREA)
  • Vascular Medicine (AREA)
  • Engineering & Computer Science (AREA)
  • Anesthesiology (AREA)
  • Biomedical Technology (AREA)
  • Heart & Thoracic Surgery (AREA)
  • Hematology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Infusion, Injection, And Reservoir Apparatuses (AREA)

Abstract

一种注射笔的锁定构造，其设于注射笔的循环推进装置（1）的螺旋导管（30）、推杆（81）及推进杆（60）之间，推进杆（60）以具有推进螺纹（631）的剂量控制段（63）穿设于螺旋导管（30）内的衔接壁（33）的管中孔（331），推杆（81）以杆部（811）穿设于推进杆（60），锁定构造包含缩口环部（36）、扣制凹部（814）与弹性扣钩（612），缩口环部（36）形成于螺旋导管（30）内的衔接壁（33）后侧面，扣制凹部（814）形成于推杆（81）的杆部（811）前段，弹性扣钩（612）形成于推进杆（60）邻近剂量控制段（63）后端。

Description

注射笔的锁定构造 技术领域
本发明涉及一种笔形的注射器，尤指一种于药剂用完后即自动制动锁定，使注射笔无法重复使用的锁定构造。
背景技术
在符合安全的规范下，为使注射笔能够有限次数的重复使用，现有的注射笔有计量型注射笔与计次型注射笔两种型式。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出剂量的药剂。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，将用户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，该注射笔于药剂瓶中的药剂用完后，注射笔中的驱动机构仍能操作，并未加以锁定，造成使用者可能继续误用，而有安全性不足的问题。
发明内容
本发明所要解决的技术问题是：提供一种注射笔的锁定构造，解决现有注射笔于药剂瓶中的药剂用完后，注射笔中的循环推进装置仍能操作，未能加以锁定，造成使用者可能继续误用的安全性不足的问题。
本发明所提出的技术解决方案是：提供一种注射笔的锁定构造，其设于该注射笔的循环推进装置的螺旋导管、推杆及推进杆之间，推进杆以其具有推进螺纹的剂量控制段穿设于螺旋导管内的衔接壁的管中孔中，推杆以其杆部穿设于推进杆的杆孔中，其中，该锁定构造包含：
一缩口环部，是形成于该螺旋导管内的衔接壁后侧面且位于管中孔外围；
至少一扣制凹部，是形成于推杆的杆部前段；以及
至少一弹性扣钩，是形成于该推进杆邻近剂量控制段后端，该推进杆于弹性扣钩周边设有穿槽，所述穿槽是自推进杆外周面径向连通其内部的杆孔，所述螺旋导管的缩口环部能挤压所述弹性扣钩，所述弹性扣钩能径向弯曲伸入杆孔内且扣制于推杆的扣制凹部中予以制动锁定。
如上所述的注射笔的锁定构造中，该推杆的杆部前段形成两径向对应的扣制凹部，该推进杆上形成两径向对应的弹性扣钩，两所述弹性扣钩分别对应于两所述扣制凹部的动作路径。
本发明可达成的有益功效是，凭借该锁定构造应用于注射笔中，当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，使注射笔的推杆无法再被朝后拉动，避免该注射笔被过度重复使用，确保注射笔的使用安全性。
本发明还可进一步于该推杆的杆部前段形成两径向对应的扣制凹部，于推进杆上形成两径向对应的弹性扣钩，两所述弹性扣钩分别对应于两所述扣制凹部的动作路径，凭借利用两弹性扣钩径向相对扣制推杆的扣制凹部而达到更佳的夹持制动锁定效果。
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是注射笔组成构造的立体分解示意图。
图2是本发明锁定构造应用于图1所示注射笔的循环推进装置中的立体分解示意图。
图3是图1及图2所示注射笔结合药剂瓶的组合剖面示意图。
图4是图3的局部放大图。
图5是图3另一部分的局部放大图。
图6是图3及图4中割面线A-A位置的端视剖面示意图。
图7是图3及图5中割面线B-B位置的端视剖面示意图。
图8是图2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9是图2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10是本发明锁定构造应用于图2所示循环推进装置的螺旋导管、推进杆与推杆中的立体分解示意图。
图11是本发明锁定构造应用于图1及图2所示注射笔中的局部剖面示意图。
图12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(一)。
图14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的实施状态参考图。
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。
具体实施方式
以下配合附图及本发明的较佳实施例，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。
本发明注射笔的锁定构造是设置于一注射笔的循环推进装置中，如图1所示，所述注射笔是以该循环推进装置1结合一药瓶套壳2用以组接药剂瓶3、针头4及针头盖5等一起使用。如图2所示，有关循环推进装置1的组成构造，其包含有一接合构件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，该注射笔还可进一步增设一笔壳6与一笔盖7。
如图2及图3所示，该接合构件10内部具有一导引孔11与一单向棘齿环槽12，所述导引孔11为一具有定位平面的非圆形孔，如：多边形孔、具有两径向相对定位平面的穿孔等，该螺旋套管20前端组接于接合构件10后端，该螺旋套管20后段设有由一位于内部的螺旋槽23以及一长导槽25构成的循环轨道，螺旋套管20后端具有一轴向止逆弹片26，该螺旋导管30装设于螺旋套管20前段内部，该螺旋导管30前端部通过螺旋套管20前端而伸入接合构件10内部，该螺旋导管30内部具有一内有管中孔331的衔接壁33以及一位于衔接壁33外侧的驱动螺旋导槽34，螺旋导管30前端外周面具有止逆棘齿弹片35，如图6所示，且以所述止逆棘齿弹片35抵接于接合构件10的单向棘齿环槽12，使螺旋导管30能单向旋转。该螺旋推进管40装设于螺旋导管30与螺旋套管20中，且螺旋推进管40能于螺旋导管30与螺旋套管20之间运动，该螺旋推进管40前段外周面具有一螺旋导块42，螺旋导块42能螺接螺旋导管30的驱动螺旋导槽34， 该螺旋推进管40中段外周面形成一导引凸块43，如图2及图8所示，该螺旋推进管40后段外周面形成一沿轴向延伸的放行沟槽44以及沿轴向等间距排列的逆止环凹纹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后段内部具有单向棘齿槽部46，该螺旋推进管40后段伸出螺旋套管20后端外，如图8及图9所示，导引凸块43能于螺旋套管20中的螺旋槽23与长导槽25构成的循环轨道中变换位置，螺旋推进管40的导引凸块能沿着螺旋槽23螺旋前进与沿着长导槽25直线后退的运动，该螺旋套管20后端的轴向止逆弹片26能于该螺旋推进管40的放行沟槽44与逆止环凹纹45之间变换位置。
如图2至图5所示，所述循环推进装置1中，该螺接套环50固定于螺旋导管30前端内部，该推进杆60具有一杆体61与一设于杆体61前端的杆端部件65，杆体61断面形状对应接合构件10的导引孔11的非圆形，且杆体61中形成一轴向贯通的杆孔62，杆体61前段为一具有推进螺纹631的剂量控制段63，推进螺纹631的螺距小于驱动螺旋槽34的螺距，杆体61前端设有卡孔613，设于杆体61前端的杆端部件65卡接该卡孔613固定。该推进杆60是装设于螺旋推进管40内，推进杆60具有推进螺纹631的剂量控制段63通过螺旋导管30的衔接壁33的管中孔331、螺设于螺接套环50的螺孔51中且对应通过接合构件10的非圆形导引孔11中，使推进杆60能直线运动。该单向棘轮环70装设于螺旋推进管40中且位于推进杆60后方，该单向棘轮环70于其环部71外周面具有径向止逆弹片72，如图7所示，且以径向止逆弹片72抵接于螺旋推进管40的单向棘齿槽部46。该注射操作构件80包含一推杆81以及一活动组设于推杆81后端的推杆端盖82，该推杆81以其断面为非圆形的杆部811伸入螺旋套管20后端、螺旋推进管40后端，再穿过单向棘轮环70内部至推进杆60的杆孔62中，单向棘轮环70固定于推杆81的杆部811上，且凭借推进杆60的杆孔62与推杆81的杆部811为非圆形配合，使推杆81仅能直线运动，该推杆81后端以及螺旋推进管40后端一同伸出螺旋套管20外组设于推杆端盖82的端盖本体821中，再以盖体822盖合于端盖本体821后端，螺旋推进管40能于推杆端盖82中旋转。
如图1、图2及图3所示，该药瓶套壳2能将一药剂瓶3固定于循环推进装置1前端，推进杆60前端的杆端部件65抵接药剂瓶3内的活塞，药瓶套壳2前端能组接一针头4，该针头4能通过药瓶套壳2前端而伸入药剂瓶3内。该笔壳6是组设于接合构件10后端且套设于螺旋套管20外侧，螺旋推进管40后端与推杆81后端伸出笔壳6后端外侧再组接推杆端盖82。该笔盖7则是可拆组地套设于药瓶套壳2外侧。
如图10及图11所示，本发明注射笔的锁定构造是包含一缩口环部36、至少一扣制凹部814以及至少一弹性扣钩612，其中：
所述缩口环部36是形成于该螺旋导管30内的衔接壁33后侧面且位于管中孔331外围。
所述扣制凹部814是形成于推杆81的杆部811前段。于本优选实施例中，于推杆81的杆部811前段形成两径向对应的扣制凹部814。
所述弹性扣钩612是形成于该推进杆60邻近剂量控制段63后端，推进杆60于弹性扣钩612周边设有穿槽611，所述穿槽611是自推进杆60外周面径向连通其内部的杆孔62，形成于穿槽611中的弹性扣钩612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，弹性扣钩612能扣制推杆81的扣制凹部814中予以制动锁定。于本优选实施例中，于推进杆60上形成两径向对应的弹性扣钩612，该两弹性扣钩612分别对应于该推杆81的两扣制凹部814的动作路径。
关于前述具有锁定构造的注射笔的使用情形，如图3所示，药剂瓶3装设于接合构件10前端，并使推进杆60前端的杆端部件65伸入药剂瓶3后端内部抵接活塞，再将药瓶套壳2套设于药剂瓶3外侧，药瓶套壳2后端结合一固定套环2C组接套接于接合构件10前端。该注射笔未装设针头进行注射前，先将笔盖7套设于药瓶套壳2外侧。
如图3及图12所示，于注射前的准备时，取下笔盖7，将针头4装设于药瓶套壳2前端且刺入药剂瓶3内，之后，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。
如图13及图14所示，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。于注射操作构件80往后拉动的过程中，一并带动螺旋推进管40朝后运动，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前端的止逆棘齿弹片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仅能单向旋转转出。如图8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9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13及图14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，注射操作构件80因推杆端盖82被施以朝前的按压力量而直线运动，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11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9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，凭借螺旋套管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直线往前行进一默认的距离，并通过推进杆60前端推动药剂瓶3内的活塞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，凭借螺旋导管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，将用户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。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内的药剂用完时，该注射笔即须丢弃。如图15及图16所示，当该注射笔使用至药剂瓶3内的药剂正好用尽时，本发明的锁定构造即发挥其制动锁定的功能，其中，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较佳实施例而已，并非对本发明做任何形式上的限制，虽然本发明已以较佳实施例揭露如上，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。
而且需要说明的是，本发明的各组成部分并不仅限于上述整体应用，本发明的说明书中描述的各技术特征可以根据实际需要选择一项单独采用或选择多项组合起来使用，因此，本发明理所当然地涵盖了与本案发明点有关的其它组合及具体应用。

Claims (2)

  1. 一种注射笔的锁定构造，设于该注射笔的循环推进装置的螺旋导管、推杆及推进杆之间，所述推进杆以其具有推进螺纹的剂量控制段穿设于螺旋导管内的衔接壁的管中孔中，所述推杆以其杆部穿设于推进杆的杆孔中，其特征在于，该注射笔的锁定构造包含：
    一缩口环部，其形成于该螺旋导管内的衔接壁后侧面且位于管中孔外围；
    至少一扣制凹部，其形成于所述推杆的杆部前段；
    至少一弹性扣钩，其形成于该推进杆邻近所述剂量控制段后端，该推进杆于所述弹性扣钩周边设有穿槽，所述穿槽自所述推进杆外周面径向连通所述推进杆内部的杆孔，所述螺旋导管的缩口环部能挤压所述弹性扣钩，所述弹性扣钩能径向弯曲伸入所述杆孔内且扣制于所述推杆的扣制凹部中予以制动锁定。
  2. 如权利要求1所述的注射笔的锁定构造，其特征在于，该推杆的杆部前段形成两径向对应的扣制凹部，所述推进杆上形成两径向对应的弹性扣钩，两所述弹性扣钩分别对应于两所述扣制凹部的动作路径。
PCT/CN2016/073529 2015-04-01 2016-02-04 注射笔的锁定构造 WO2016155417A1 (zh)

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EP16771172.0A EP3278826B1 (en) 2015-04-01 2016-02-04 Locking structure for injection pen
JP2017549223A JP6429161B2 (ja) 2015-04-01 2016-02-04 注射ペンのロック構造
US15/561,554 US20180085536A1 (en) 2015-04-01 2016-02-04 Locking Device for a Syringe
KR1020177029525A KR102100546B1 (ko) 2015-04-01 2016-02-04 주입 펜용 잠금장치

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EP3278826A4 (en) 2018-11-21
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KR20170129198A (ko) 2017-11-24
EP3278826B1 (en) 2021-04-14
TWI587884B (zh) 2017-06-21
JP6429161B2 (ja) 2018-11-28
CN106139322A (zh) 2016-11-23
EP3278826A1 (en) 2018-02-07
KR102100546B1 (ko) 2020-04-14
TW201636062A (zh) 2016-10-16

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