WO2015149323A1 - 注射器 - Google Patents

注射器 Download PDF

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Publication number
WO2015149323A1
WO2015149323A1 PCT/CN2014/074713 CN2014074713W WO2015149323A1 WO 2015149323 A1 WO2015149323 A1 WO 2015149323A1 CN 2014074713 W CN2014074713 W CN 2014074713W WO 2015149323 A1 WO2015149323 A1 WO 2015149323A1
Authority
WO
WIPO (PCT)
Prior art keywords
spiral
push rod
spiral conduit
injection
conduit
Prior art date
Application number
PCT/CN2014/074713
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 EP14888120.4A priority Critical patent/EP3127567B1/en
Priority to JP2017501445A priority patent/JP6199526B2/ja
Priority to CA2943554A priority patent/CA2943554C/en
Priority to PCT/CN2014/074713 priority patent/WO2015149323A1/zh
Publication of WO2015149323A1 publication Critical patent/WO2015149323A1/zh
Priority to US15/274,814 priority patent/US10149944B2/en
Priority to PH12016501931A priority patent/PH12016501931B1/en

Links

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
    • A61M5/31528—Dosing by means of rotational movements, e.g. screw-thread 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
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31545—Setting modes for dosing
    • A61M5/31548—Mechanically operated dose setting member
    • A61M5/31555—Mechanically operated dose setting member by purely axial movement of dose setting member, e.g. during setting or filling of a syringe
    • 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
    • A61M5/31573—Accuracy improving means
    • A61M5/31575—Accuracy improving means using scaling up or down transmissions, e.g. gearbox
    • 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
    • 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
    • A61M5/3129—Syringe barrels

Definitions

  • This invention relates to a syringe, and more particularly to a syringe having both a safely controlled injection dose function and a labor-saving function. Background technique
  • syringes are available in both metered and graduated syringes.
  • a driving mechanism composed of a plurality of driving components is mainly connected in a syringe casing to connect a push rod, thereby installing a drug bottle in the syringe casing, at the front end of the syringe casing.
  • a needle is arranged, and the needle is connected to the medicine bottle.
  • the needle When the needle is injected, the needle is broken into a predetermined part of the human body, and the rear end of the push rod is pressed, so that the push rod is controlled by the driving part driving the driving mechanism, thereby pushing the piston in the medicine bottle to move.
  • the stroke outputs a predetermined dose of the medicament through the needle.
  • the technical solution proposed by the present invention is to provide a syringe for use in combination with a medicament bottle and a needle, the syringe comprising:
  • An outer casing which is a hollow body having an opening formed at the front end and the rear end;
  • An engagement collar is disposed at a front end of the outer casing, the engagement collar has an inner ring portion therein, and a one-way ratchet groove having a plurality of single oblique ratchet teeth is formed in the inner ring portion;
  • a medicine bottle sleeve which is assembled at a front end of the joint sleeve for fixing the medicine bottle therein, and the front end of the medicine bottle sleeve is detachably set on the needle set;
  • An inner sleeve is disposed in the outer casing, and the front end of the inner sleeve is fixed in the joint collar; a bidirectional spiral guiding tube set comprising an outer spiral conduit and an inner spiral conduit, the outer spiral conduit being mounted in the inner sleeve, the outer spiral conduit comprising a screw portion and a tube formed at the front end of the solenoid portion
  • the inner peripheral wall of the spiral tube portion forms a spiral guide groove
  • the outer peripheral surface of the tube end forms a plurality of single oblique ratchet elastic pieces, and the ratchet elastic pieces respectively abut the single oblique ratchet teeth of the one-way ratchet groove of the engaging collar
  • the outer spiral conduit can only be rotated in one direction, the inner spiral conduit is installed in the inner sleeve and the outer spiral conduit, and the outer peripheral surface of the inner spiral conduit is provided with a plurality of spiral guide blocks, and the spiral guide block is placed in the outer spiral a spiral guide groove of the catheter
  • a threaded ring which is set in the tube end of the outer spiral conduit, and a screw hole is formed in the threaded ring;
  • the one-way ratchet which is mounted in a one-way ratchet groove of the inner spiral conduit, the one-way ratchet includes a wheel body and a plurality of single oblique ratchet springs formed on the outer peripheral surface of the wheel, formed in the wheel body a middle hole, the single oblique ratchet spring meshes with a single oblique ratchet in the one-way ratchet groove;
  • a screw push rod comprising a dose control section, wherein a thread is arranged on the outer circumference of the dose control section, a shaft hole is formed in the screw push rod, and the screw push rod is installed in the bidirectional spiral guide tube group, and the dose of the screw push rod is
  • the control section is threaded through the interior of the threaded ring and is configured to extend into the medicament bottle to apply a thrust;
  • An injection pusher set comprising an injection pusher and a pusher end cover, the injection pusher comprising a rod body and a pressing end portion disposed at the rear end of the rod body, the rod body of the injection push rod passing through the fixed one-way ratchet
  • the rod body is axially slidably disposed in the shaft hole of the screw push rod, and the rear end and the pressing end portion of the rod of the injection push rod are located outside the inner spiral duct
  • the push rod end cover is sleeved on the injection push Outside the pressing end of the rod, the rear end of the inner spiral conduit is pivotally disposed in the push rod end cover, so that the injection push rod group can be combined with the one-way ratchet, the bidirectional spiral guiding tube group, the screw ring and the screw push rod to open and close.
  • the rear end of the inner sleeve forms a check button and a limit retaining edge
  • the outer peripheral surface of the rear portion of the inner spiral conduit forms a plurality of check loops and is provided with a predetermined length of the guide shaft.
  • the check button can resist the reverse spiral of the inner spiral conduit to prevent the inner spiral conduit from moving forward, and the check button is changed to the shaft guide groove, so that the inner spiral conduit can be driven to move forward,
  • the limit retaining edge limits the position of the inner helical catheter to move backward.
  • the shaft hole of the auger is non-circular corresponding to the shape of the rod of the injection pusher.
  • an outer circumferential surface of the threaded ring forms an axially extending positioning convex portion
  • an inner wall of the outer end of the outer spiral conduit forms a positioning concave portion, by a combination of the corresponding positioning convex portion and the positioning concave portion, Position the threaded ring in the tube end of the outer spiral conduit.
  • the front and rear ends of the engaging collar are respectively an engaging ring portion and a set of connecting ring portions, and the engaging ring portion is disposed in the outer casing, and the engaging collar is in the inner ring portion.
  • a plurality of hooks are disposed between the joint ring portions, and an inner ring is disposed between the joint ring portion and the inner ring portion; the inner sleeve extends into the inner end of the joint collar to have a card slot.
  • the card slot provides a hook corresponding to the engagement ring, and the inner ring sleeve is sleeved on the outer side of the hook to engage and fix the inner sleeve and the engagement collar.
  • a front end of the dose control section of the auger is provided with a piston top block.
  • the beneficial effect that can be achieved by the present invention is that the invention is constructed by the overall combination of the aforementioned syringes, so that after the syringe is assembled, after the needle is installed, the injection pusher can be quickly pulled in a straight back pull manner.
  • the invention is combined with a one-way ratchet, a two-way spiral guiding tube set, a screwing ring and a screw push rod by an injection pusher group, so that it can be opened and closed in a circular injection operation.
  • the operation mode achieves the effect of labor saving.
  • the invention can also be constructed by the combination of the check button of the inner sleeve and the reverse loop of the inner spiral conduit, so that the injection pusher set of the syringe must be pulled back to a predetermined position before the injection pusher group can be pressed. Injection, and through the back end of the inner sleeve and the back-stop ring of the inner spiral surface of the inner spiral tube to generate a blocking limit function, the inner spiral tube is not pulled in the middle of being pulled out along with the injection push rod group. And retracting, to ensure that the syringe can reach the set injection dose every time the injection dose.
  • the syringe of the present invention further includes a cap that allows the syringe to be removed before the cap can be removed, ensuring that the syringe can be replaced with a new needle each time it is used.
  • Figure 1 is a perspective exploded view of a preferred embodiment of the syringe of the present invention and a needle and a needle cover.
  • Figure 2 is an exploded perspective view of another viewing angle of a partial component of the syringe of Figure 1.
  • Figure 3 is a cross-sectional view showing the preferred embodiment of the syringe of Figures 1 and 2 without a needle and a cap.
  • Figure 4 is a schematic end elevational view of the section line position A-A of Figure 3;
  • Figure 5 is a schematic end elevational view of the section line position B-B of Figure 3;
  • Figure 6 is an exploded perspective view of the preferred embodiment of the syringe of Figures 1 through 3 with the vial cap removed, and the cap, needle, and needle cap.
  • Figure 7 is a cross-sectional view showing the preferred embodiment of the syringe of Figures 1 to 3 with the pen cover removed, the needle and the needle cover attached, and the push rod pulled out to the predetermined position.
  • Figure 8 is a cross-sectional view showing the preferred embodiment of the syringe of Figures 1 to 3 with the needle cover removed and the pusher of the pusher being injected.
  • Figure 9 is a cross-sectional view showing the preferred embodiment of the syringe of Figures 1 through 3 when the pusher is used to inject a metered dose of the drug.
  • the syringe 1 is used to combine the medicament bottle 2 with the needle 3 and the needle cover 4.
  • the composition of the syringe 1 mainly includes an external protection.
  • the putter set 90 is injected, or the syringe 1 is further inserted into a cover 5 .
  • the outer casing 10 is a hollow body having an opening formed at both front and rear ends, and the front end of the outer casing 10 is a joint end 11.
  • the engagement collar 20 includes an engagement ring portion 21, a set of ring portions 22, and an inner ring portion 23.
  • the assembly ring portion 22 and the engagement ring portion 21 are respectively engaged.
  • the front end and the rear end of the collar 20 are located inside the joint collar 20, and the joint collar 20 is assembled inside the joint end 11 of the outer casing 10 with the joint ring portion 21, which is A one-way ratchet groove 24 having a plurality of single oblique ratchet teeth is formed in the ring portion 23.
  • the engaging collar 20 is provided with a plurality of hooks 25 between the inner ring portion 23 and the engaging ring portion 21, and the engaging collar 20 is at the engaging ring portion.
  • An inner ring 26 can be further disposed between the inner ring portion 21 and the inner ring portion 23.
  • the vial casing 30 is assembled on the engaging ring portion 21 at the front end of the engaging collar 20 for fixing a pharmaceutical bottle 2 therein.
  • the front end of the vial case 30 is provided with a set of 3 needles.
  • the inner sleeve 40 is mounted inside the outer casing 10.
  • the front end of the inner sleeve 40 extends into the joint ring portion 21 of the joint collar 20, and is sleeved in the inner ring.
  • the outer portion of the inner sleeve 40 is inserted into the engaging collar 20, and the front end of the inner sleeve 40 is provided with a card slot 41.
  • the card slot 41 provides a hook 25 for engaging the collar 20, and the corresponding hook is inserted therein.
  • the inner ring ring 26 is sleeved on the outer side of the hook 25, and the inner sleeve 40 is engaged with the joint collar 20.
  • the rear end of the inner sleeve 40 can extend outside the outer casing 10, and the rear end of the inner sleeve 40 forms a rear end.
  • the check button 42 and the limit stop 43 are provided.
  • the bidirectional helical guiding tube set 50 comprises an outer helical catheter
  • An inner spiral conduit 52 is disposed in the inner sleeve 40.
  • the outer spiral conduit 51 includes a screw portion 511.
  • the front end of the solenoid portion 511 forms a ring end wall 512 and a self-loop end.
  • the inner end wall of the screw portion 511 is formed with a spiral guide groove 514.
  • the outer peripheral surface of the tube end 513 is formed with a plurality of single oblique ratchet elastic pieces 515, and the inner end of the tube end 513 is provided with an axial extension.
  • the positioning recess 516 as shown in FIGS.
  • the tube end 513 of the outer spiral conduit 51 extends into the inner ring portion 23 of the engagement collar 20, and the ratchet springs 515 abut the single of the engagement collar 20, respectively.
  • the outer helical catheter 51 can only be rotated in one direction.
  • the inner spiral duct 52 is installed in the inner sleeve 40 and the outer spiral duct 51, and the outer peripheral surface of the front section of the inner spiral duct 52 is provided.
  • the spiral guide blocks 521 are inserted into the spiral guide grooves 514 of the outer spiral conduit 51.
  • the outer peripheral surface of the inner portion of the inner spiral conduit 52 is formed with a plurality of spaced-apart check loops 522, and has a predetermined length of the axial guide groove 523, and the reverse stop loop 522 is a single oblique direction.
  • a one-way ratchet groove 524 having a plurality of single oblique ratchets is formed inside the rear portion of the inner spiral conduit 52.
  • the one-way ratchet groove 524 The single oblique ratchet is the same oblique direction as the single oblique ratchet of the one-way ratchet groove 24 in the engaging collar 20, and the rear end of the inner spiral conduit 52 forms a pivoting portion 525, and the inner spiral conduit 52 is pivotally connected.
  • the portion 525 can extend beyond the rear end of the inner sleeve 40, and the check button 42 at the rear end of the inner sleeve 40 can be displaced between the reverse ring 522 and the extended guide groove 523 of the rear portion of the inner spiral conduit 52. As shown in FIGS.
  • the inner spiral conduit 52 can move forward in the axial direction, and the check button 42 abuts against the reverse loop of the inner spiral conduit 52.
  • the inner spiral conduit 52 can be prevented from being inadvertently moved linearly toward the front axial direction.
  • the threaded ring 60 is axially mounted in the tube end 513 of the outer spiral conduit 51.
  • the threaded ring 60 defines a screw hole 61.
  • the pitch of the screw hole 61 is smaller than that of the spiral.
  • the outer circumferential surface of the threaded ring 60 forms an axially extending positioning projection 62 corresponding to the positioning recess 516 in the outer spiral conduit 51, so that the screw ring 60 is combined with the outer spiral conduit 51. .
  • the one-way ratchet 70 is mounted in a one-way ratchet groove 524 of the inner spiral conduit 52.
  • the one-way ratchet 70 includes a wheel body 71 and a plurality of wheels formed thereon.
  • the single oblique ratcheting piece 72 of the outer peripheral surface of the body 71 forms a middle hole 73 in the wheel body 71.
  • the shape of the middle hole 73 corresponds to the non-circular shaft hole of the screw push rod 80, and the single oblique ratchet of the one-way ratchet 70
  • the toothed elastic piece 72 is in the same oblique direction as the single oblique ratcheting elastic piece 515 of the tube end 513 of the outer spiral conduit 51.
  • the single oblique ratcheting elastic piece 72 and the one-way ratcheting groove 524 are The one-way ratchets mesh.
  • the auger 80 has a dose control section 81.
  • the outer circumference of the dose control section 81 is provided with a thread, and the middle section of the screw pusher 80 forms a limit protrusion on the side edge of the dose control section 81.
  • a non-circular shaft hole 83 is formed in the screw push rod 80.
  • the screw push rod 80 is disposed in the bidirectional spiral guiding tube set 50, and the dose control section 81 of the screw push rod 80 is screwed through the screw ring 60. And can extend into the medicament bottle 2 and directly push against the piston 2A.
  • the front end of the dose control section 81 of the screw pusher 80 can be provided with a piston top block 84, so that the screw push rod 80 is pushed indirectly via the piston top block 84. The piston 2A in the vial 2 is received.
  • the injection pusher set 90 includes an injection pusher 91 and a pusher end cover 92.
  • the injection pusher 91 includes a rod 911 and a pressing end disposed at the rear end of the rod 911. 912, the cross-sectional shape of the rod 911 corresponds to the non-circular shaft hole 83 in the screw push rod 80 and the non-circular middle hole 73 in the one-way ratchet 70, and the injection push rod 91 can axially slide with the rod body 911 Passing through the shaft hole 83 of the screw push rod 80, and the rod body 911 It is fixed through the middle hole 73 of the one-way ratchet 70, wherein a positioning stopper 913 is formed on the rod body 911, and the one-way ratchet 70 is fixed to the rod body 911 by the positioning stopper 913, and the rod body 911 of the injection push rod 91 has The rear end of the pressing end portion 912 protrudes out of the inner spiral conduit 52.
  • the push rod end cover 92 is s
  • the syringe of the present invention As shown in Figs. 3 and 6, when the pharmaceutical bottle 2 is assembled, it is in a state where the vial case 30 is removed, and the drug bottle 2 has one end of the piston 2A extending into the engaging collar. 20 positioning, the piston top block 84 at the side end of the screw push rod 80 extends into the medicament bottle 2 to abut the piston 2A, and then sets the vial sleeve 30 outside the medicament bottle 2, through the vial sleeve 30 and the combined collar The combination of 20 secures the vial 2 to the syringe 1. When the needle 3 and the needle cover 4 are not assembled on the vial case 30 and the drug bottle 2 is not assembled, the pen cover 5 is first set on the outside of the vial case 30.
  • the pen cover 5 When preparing for injection, as shown in FIG. 3 and FIG. 7, the pen cover 5 is removed, the needle 3 and the needle cover 4 are attached, the needle 3 end is inserted into the drug bottle 2, and the needle cover 4 is covered on the outside of the needle 3 to avoid The user is mistaken by the needle 3.
  • the injection pusher set 90 is quickly pulled straight back to the predetermined position in the axial direction until the spiral guide block 521 of the outer peripheral surface of the inner spiral conduit 52 is moved to contact the inner end of the inner sleeve 40 at the limit retaining edge 43. Stay stopped.
  • the inner spiral conduit 52 is simultaneously moved backward and idling is generated inside the outer spiral conduit 51, and the check button 42 at the rear end of the inner sleeve 40 can be in the reverse loop of the inner spiral conduit 52.
  • a bounce occurs at the rib 522 to generate a sound, and the check button 42 at the rear end of the inner sleeve 40 abuts against the limit of the check ring 522 of the inner spiral conduit 52, thereby preventing the injection pusher group 90 from being driven by the wrong pressure.
  • the function of linearly moving the inner spiral conduit 52 toward the front axial direction causes the injection pusher set 90 to be retracted without being crushed during the process of pulling back.
  • the needle cover is removed, the needle 3 is inserted into the predetermined injection site of the human body, and the injection pusher group 90 is pressed to start the injection, wherein the injection pusher set 90 is pressed straight forward.
  • the group 90 is moved in the same direction as the front direction, and the outer spiral conduit 51 is driven to rotate in the forward direction by the spiral guide block 521 on the outer peripheral surface of the inner spiral conduit 52 until the inner spiral conduit 52 completes the travel distance of the outer spiral conduit 51, and the injection is performed.
  • the push rod set 90 extends into the outer casing 10 to close, and the outer spiral duct 51 rotates when it rotates in the same direction.
  • the ring 60 rotates, and the screw push rod 80 is rotationally driven to rotate by the screw ring 60 to apply a thrust to the piston 2A in the drug bottle 2, and the medicine in the drug bottle 2 is output through the needle 3.
  • the engagement of the spiral guide groove 514 of the predetermined stroke distance inside the outer spiral conduit 51 with the spiral guide block 521 of the outer circumferential surface of the inner spiral conduit 52, and the screwing ring 60 of the outer spiral conduit 51 are screwed together.
  • the cooperation of the rod 80 enables the pressing of the injection pusher group 90 to directly advance the distance of the predetermined stroke, and drives the screw ring 60 to drive the screw push rod 80 to rotate one turn, that is, stop, thereby controlling the output of the vial 2
  • the injected dose is set.
  • the screw hole of the screw ring 60 and the thread of the screw push rod 80 are small pitch strokes.
  • the needle cover 4 is first sleeved on the outer side of the needle 3, and then the needle 3 and the needle cover 4 are pulled out from the syringe 1, and the pen cover 5 is closed on the outside of the vial case 30 of the syringe 1, ensuring that You can replace the new needle 3 with one use.
  • the syringe 1 is invented by the injection pusher set 90 in combination with the one-way ratchet 70, the bidirectional helical guide tube set 50, the screwing ring 60 and the screw push rod 80, so that it is injected every time. During operation, it can be easily opened and closed by the user.
  • the number of threads and the pitch of the outer peripheral surface of the dose control section 81 of the screw pusher 80 are set according to the drug volume in the vial 2, and the injection number and the injection dose are set, so that the syringe 1 has the functions of fixed dose injection and automatic counting use. .
  • the number of uses of the syringe 1 containing the vial 2 reaches a predetermined number of times, the medicament in the vial 2 is just used up, and at this time, the syringe 1 is discarded to prevent the syringe 1 from being overused.

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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

一种注射器（1），其用以结合药剂瓶（2）与针头（3）使用，该注射器（1）包含外护壳（10）、接合套环（20）、药瓶套壳（30）、内套管（40）、双向螺旋导引管组（50）、螺接环（60）、单向棘轮（70）、螺旋推杆（80）与注射推杆组（90），接合套环（20）设于外护壳（10）前端，并结合药瓶套壳（30）组设药剂瓶（2），外护壳（10）内部组设内套管（40）、双向螺旋导引管组（50）、螺接环（60）、单向棘轮（70）、螺旋推杆（80）与注射推杆组（90）等，使其能直向快速后拉注射推杆组（90），再直向按压注射推杆组（90）注射，并利用双向螺旋导引管组（50）的大螺距行程构造，搭配螺接环（60）的螺孔（61）与螺旋推杆（80）间的小螺距行程构造，将直向按压力量转换为旋转力量，结合大行程旋转推力转换至小行程旋转的注射推力，使其达到定量注射药剂的目的，且以循环开闭的简便操作方式达到省力的功效。

Description

注射器
技术领域
本发明涉及一种注射器， 特别涉及一种兼具安全控制注射剂量功 能以及操作省力功能的注射器。 背景技术
为了因应药剂定量注射、 计数注射次数以及注射器能够有限重复 再利用等使用目的， 目前已知的注射器大概有计量型注射器与计次型 注射器两种形式。 其中， 已知的计量型注射器组成构造中， 其主要在 一注射器外壳内装设一组由多个驱动部件组成的驱动机构连接一推 杆， 借以在注射器外壳中装设药剂瓶， 在注射器外壳前端装设针头， 针头连接药剂瓶， 在注射时， 针头剌入人体预定部位， 经按压推杆后 端， 使推杆经由带动驱动机构的驱动部件连动控制， 进而推动药剂瓶 内的活塞移动预定的行程而通过针头输出预定剂量的药剂。
前述已知计量型注射器虽达到定量输出药剂的目的， 但是该注射 器在使用操作的过程中， 因受限于注射器的驱动机构各驱动部件间连 动的牵制， 造成该注射器在注射药剂时有操作费力的问题。 发明内容
为了解决上述技术问题， 本发明的目的在于提供一种注射器， 解 决改善现有计量型注射器操作费力的问题。
为了达到上述目的， 本发明所提出的技术解决方案是： 提供一种 注射器， 是用以结合药剂瓶与针头使用， 该注射器是包含：
一外护壳， 其是一前端与后端形成开口的中空体；
一接合套环， 其是组设于外护壳前端， 该接合套环内部具有一内 环部， 该内环部中形成一具有多个单斜向棘齿的单向棘齿槽；
一药瓶套壳， 其是组接于接合套环前端， 用以将所述药剂瓶固定 其中， 药瓶套壳前端可供所述针头可拆组地套组其上；
一内套管， 其是装设于外护壳内， 该内套管前端固定于接合套环 内； 一双向螺旋导引管组， 其包含一外螺旋导管与一内螺旋导管， 外 螺旋导管装设于内套管内， 所述外螺旋导管包含有一螺管部以及一形 成于螺管部前端的管端， 螺管部内周壁形成一螺旋导槽， 管端外周面 形成多个单斜向棘齿弹片， 所述棘齿弹片分别抵接于接合套环的单向 棘齿槽的单斜向棘齿上， 使外螺旋导管仅能单向旋转， 所述内螺旋导 管装设于内套管与外螺旋导管内， 内螺旋导管前段外周面设有多个螺 旋导块， 螺旋导块置入外螺旋导管的螺旋导槽， 使内螺旋导管能在外 螺旋导管中旋转行进一预定行程距离， 内螺旋导管后段内部形成一具 有多个单斜向棘齿的单向棘齿槽；
一螺接环， 其是组设定位于外螺旋导管的管端中， 该螺接环中形 成一螺孔；
一单向棘轮， 其是装设于内螺旋导管的单向棘齿槽中， 该单向棘 轮包含一轮体以及多个形成于轮体外周面的单斜向棘齿弹片， 轮体中 形成一中孔， 所述单斜向棘齿弹片与所述单向棘齿槽中的单斜向棘齿 相啮合；
一螺旋推杆， 其包含有一剂量控制段， 在剂量控制段外周面设有 螺纹， 螺旋推杆中形成轴孔， 螺旋推杆是装设于双向螺旋导引管组内， 螺旋推杆的剂量控制段螺接通过螺接环内部， 且用以伸入所述药剂瓶 内施以推力； 以及
一注射推杆组， 其包含一注射推杆与一推杆端盖， 注射推杆包含 一杆体与一设于杆体后端的按压端部， 注射推杆的杆体穿过固接于单 向棘轮的中孔中， 且杆体是能轴向滑移地穿设于螺旋推杆的轴孔中， 注射推杆的杆体后端及按压端部位于内螺旋导管外， 推杆端盖套设于 注射推杆的按压端部外侧， 内螺旋导管后端枢设于推杆端盖中， 使注 射推杆组结合单向棘轮、 双向螺旋导引管组、 螺接环与螺旋推杆能循 环开闭动作。
如上所述的注射器中， 所述内套管后端形成一逆止键以及一限位 挡缘， 所述内螺旋导管后段外周面形成多个逆止环纹且设有一预定长 度的轴向导槽， 逆止键能抵止于内螺旋导管的逆止环纹处阻止内螺旋 导管朝前运动， 且逆止键变换至轴向导槽处， 使内螺旋导管能被驱动 朝前运动， 所述限位挡缘限制内螺旋导管后移的位置。 如上所述的注射器中， 螺旋推杆的轴孔与注射推杆的杆体形状为 相对应的非圆形。
如上所述的注射器中， 所述螺接环外周面形成一轴向延伸的定位 凸部， 所述外螺旋导管的管端内壁形成定位凹部， 通过相对应的定位 凸部与定位凹部的结合， 使螺接环定位于外螺旋导管的管端内。
如上所述的注射器中， 所述接合套环前后端分别为一接合环部与 一组接环部， 接合环部置入组设于外护壳内， 所述接合套环在内环部 与接合环部之间设有多个卡钩， 接合套环在接合环部与内环部之间装 设一内环圈； 所述内套管伸入接合套环内部的前端设有卡槽， 卡槽提 供接合套环的卡钩对应卡入其中， 内环圈套设于卡钩外侧， 使内套管 与接合套环接合固定。
如上所述的注射器中， 所述螺旋推杆的剂量控制段前端装设一活 塞顶块。
本发明可达成的有益功效即有益效果是通过前述注射器的整体组 合构造发明， 使该注射器组装药剂瓶后， 在装设上针头后， 能够以直 向后拉方式快速地将注射推杆拉至预备注射位置， 并在直向按压注射 推杆组时， 通过外螺旋导管的螺旋导槽与内螺旋导管的螺旋导块的大 螺距行程组合构造， 搭配螺接头的螺孔与螺旋推杆的螺纹为小螺距行 程组合构造， 将直向的按压力量转换为旋转力量， 并由大行程旋转推 力转换为小行程旋转的注射推力， 不仅达到定量注射药剂及良好使用 安全性的目的， 且该注射器在使用时， 通过注射推杆组结合单向棘轮、 双向螺旋导引管组、 螺接环与螺旋推杆的连动机构发明， 使其在定量 注射的操作过程中， 能以循环开闭的简便的操作方式达到省力的功效。
本发明还可通过内套管的逆止键与内螺旋导管的逆止环纹的组合 构造， 使该注射器的注射推杆组必须朝后拉出至预定位置， 方能按压 注射推杆组进行注射， 且通过内套管后端逆止键搭配内螺旋导管外周 面的逆止环纹产生阻挡限位的功能， 在内螺旋导管随同注射推杆组被 拉出的中途不会因为被误压而回缩， 确保该注射器每一次注射剂量皆 能达到设定注射剂量。
此外， 本发明注射器还包含一笔盖， 使该注射器必须卸下针头的 状态下， 方能盖上笔盖， 确保注射器每一次使用皆能更换新的针头。 附图说明
图 1 是本发明注射器的一较佳实施例与针头、 针头盖的立体分解 示意图。
图 2是图 1所示注射器中局部部件的另一观视角度的立体分解示 意图。
图 3是图 1及图 2所示注射器较佳实施例未装针头、 盖上笔盖时 的剖面示意图。
图 4是图 3所示剖面线位置 A-A的端视剖面示意图。
图 5是图 3所示剖面线位置 B-B的端视剖面示意图。
图 6是图 1至图 3所示注射器较佳实施例拆下药瓶套壳， 以及与 笔盖、 针头、 针头盖的分解示意图。
图 7是图 1至图 3所示注射器较佳实施例取下笔盖、 装上针头与 针头盖、 并拉出推杆至预定位置时的剖面示意图。
图 8是图 1至图 3所示注射器较佳实施例拔下针头盖， 在按压推 杆开始注射时的剖面示意图。
图 9是图 1至图 3所示注射器较佳实施例在按压推杆注射定量药 剂完毕时的剖面示意图。
主要部件符号说明：
1 注射器 2 药剂瓶
2A 活塞 3 针头
4 针头盖 5 笔 ¾皿
10 外护壳 11 结合而
20 接合套环 21 接合环部
22 组接环部 23 内环部
24 单向棘齿槽 25 卡钩
26 内环圈
30 药瓶套壳
40 内套管 41 卡槽
42 逆止键 43 限位挡缘
50 双向螺旋导弓 1管组 51 外 511 螺管部 512 环端壁
513 官 而 514 螺旋导槽
515 棘齿弹片 516 定位凹部
52 内螺旋导管 521 螺旋导块
522 逆止环纹 523 轴向导槽
524 单向棘齿槽 525 枢接部
60 螺接环 61 螺孔
62 定位凸部
70 单向棘轮 71 轮体
72 单斜向棘齿弹片 73 中孔
80 螺旋推杆 81 剂量控制段
82 限位凸缘 83 轴孔
84 活塞顶块
90 注射推杆组 91 注射推杆
911 杆体 912 按压端部
913 定位挡块 92 推杆端盖。 具体实施方式
以下配合附图及本发明的较佳实施例， 进一歩阐述本发明为达成 预定发明目的所采取的技术手段。
如图 1及图 2所示， 是揭示本发明注射器的一较佳实施例， 该注 射器 1是用以结合药剂瓶 2与针头 3、针头盖 4使用， 该注射器 1的组 成主要包含一外护壳 10、 一接合套环 20、 一药瓶套壳 30、 一内套管 40、 一双向螺旋导引管组 50、 一螺接环 60、 一单向棘轮 70、 一螺旋推 杆 80以及一注射推杆组 90，或者，该注射器 1还进一歩包含一笔盖 5。
如图 1及图 2所示， 所述外护壳 10是一前后两端皆形成开口的中 空体， 外护壳 10前端为结合端 11。
如图 1、 图 2所示， 所述接合套环 20包含有一接合环部 21、 一组 接环部 22以及一内环部 23，所述组接环部 22与接合环部 21分别位于 接合套环 20前端与后端， 内环部 23位于接合套环 20的内部， 该接合 套环 20并以接合环部 21置入外护壳 10的结合端 11内部组合， 该内 环部 23中则形成一具有多个单斜向棘齿的单向棘齿槽 24。如图 3所示， 在本较佳实施例中， 所述接合套环 20在内环部 23与接合环部 21之间 设有多个卡钩 25，所述接合套环 20在接合环部 21与内环部 23之间还 可进一歩装设一内环圈 26。
如图 1、 图 2所示， 所述药瓶套壳 30是组设于接合套环 20前端的 接合环部 21上， 用以将一药剂瓶 2固定其中。 所述药瓶套壳 30前端 可供一针头 3套组其上。
如图 1至图 3所示， 所述内套管 40是装设于外护壳 10内部， 该 内套管 40前端伸入接合套环 20的接合环部 21内，且套接于内环部 23 外侧固定， 在本较佳实施例中， 内套管 40伸入接合套环 20中的前端 设有卡槽 41， 卡槽 41提供接合套环 20的卡钩 25对应卡入其中， 并以 内环圈 26套设于卡钩 25外侧， 而使内套管 40与接合套环 20接合固 定， 内套管 40的后端则可伸出外护壳 10外， 内套管 40后端形成一逆 止键 42以及限位挡缘 43。
如图 1至图 3所示， 所述双向螺旋导引管组 50包含一外螺旋导管
51以及一内螺旋导管 52， 所述外螺旋导管 51是装设于内套管 40内， 外螺旋导管 51包含有一螺管部 511，螺管部 511前端形成一环端壁 512 以及自环端壁 512朝前凸伸的管端 513，螺管部 511内周壁形成一螺旋 导槽 514， 管端 513中外周面形成多个单斜向棘齿弹片 515， 管端 513 内壁设有一轴向延伸的定位凹部 516， 如图 3及图 4所示， 外螺旋导管 51的管端 513伸入接合套环 20的内环部 23中， 这些棘齿弹片 515分 别抵接于接合套环 20的单向棘齿槽 24的单斜向棘齿上， 使外螺旋导 管 51仅能单向旋转。
如图 1至图 3所示， 所述双向螺旋导引管组 50中， 所述内螺旋导 管 52是装设于内套管 40与外螺旋导管 51内， 该内螺旋导管 52前段 外周面设有多个螺旋导块 521， 并以螺旋导块 521置入外螺旋导管 51 的螺旋导槽 514， 通过螺旋导块 521与螺旋导槽 514的配合， 使内螺旋 导管 52能在外螺旋导管 51中旋转行进一预定行程距离， 内螺旋导管 52后段外周面形成多个间隔排列的逆止环纹 522， 且具有一预定长度 的轴向导槽 523， 所述逆止环纹 522为单斜向， 内螺旋导管 52后段内 部形成一具有多个单斜向棘齿的单向棘齿槽 524， 该单向棘齿槽 524 的单斜向棘齿与接合套环 20中的单向棘齿槽 24的单斜向棘齿为相同 斜向， 内螺旋导管 52后端形成一枢接部 525， 内螺旋导管 52的枢接部 525能伸出内套管 40后端外， 内套管 40后端的逆止键 42能在内螺旋 导管 52后段的逆止环纹 522与伸入轴向导槽 523间变换位置。 如图 3 及图 5所示， 当逆止键 42伸入轴向导槽 523中， 内螺旋导管 52方能 沿轴向朝前运动， 逆止键 42抵接内螺旋导管 52的逆止环纹 522时， 则能阻止内螺旋导管 52被误压而朝前轴向直线运动。
如图 1至图 3所示，所述螺接环 60是可轴向装设于外螺旋导管 51 的管端 513中， 该螺接环 60中成一螺孔 61， 螺孔 61的螺距小于螺旋 导槽 514的螺距。 在本较佳实施例中， 螺接环 60外周面形成一轴向延 伸的定位凸部 62， 与外螺旋导管 51中的定位凹部 516对应配合， 使螺 接环 60与外螺旋导管 51结合一起。
如图 1至图 3所示，所述单向棘轮 70是装设于所述内螺旋导管 52 的单向棘齿槽 524中， 该单向棘轮 70包含有一轮体 71 以及多个形成 于轮体 71外周面的单斜向棘齿弹片 72， 轮体 71中形成一中孔 73， 中 孔 73形状对应于螺旋推杆 80的非圆形轴孔， 该单向棘轮 70的单斜向 棘齿弹片 72与外螺旋导管 51管端 513的单斜向棘齿弹片 515为相同 斜向， 如图 5所示， 所述单斜向棘齿弹片 72与所述单向棘齿槽 524中 的单向棘齿相啮合。
如图 1至图 3所示，所述螺旋推杆 80具有一剂量控制段 81，在剂 量控制段 81外周面设有螺纹， 螺旋推杆 80中段在剂量控制段 81的侧 缘形成限位凸缘 82， 螺旋推杆 80中形成非圆形的轴孔 83， 螺旋推杆 80是设于双向螺旋导引管组 50内，螺旋推杆 80的剂量控制段 81螺接 通过螺接环 60内部， 且能伸入药剂瓶 2内直接推抵活塞 2A, 或者， 所述螺旋推杆 80的剂量控制段 81前端可装设一活塞顶块 84， 使螺旋 推杆 80经由活塞顶块 84间接推抵药剂瓶 2内的活塞 2A。
如图 1至图 3所示， 所述注射推杆组 90包含有一注射推杆 91与 一推杆端盖 92， 该注射推杆 91包含一杆体 911 以及一设于杆体 911 后端的按压端部 912， 杆体 911的断面形状相应于螺旋推杆 80中的非 圆形轴孔 83以及单向棘轮 70中的非圆形中孔 73形状， 注射推杆 91 以其杆体 911可轴向滑移地穿设于螺旋推杆 80的轴孔 83， 且杆体 911 穿过单向棘轮 70的中孔 73中予以固定， 其中通过杆体 911上形成一 定位挡块 913， 以定位挡块 913将单向棘轮 70固定于杆体 911上， 注 射推杆 91的杆体 911具有按压端部 912的后端伸出内螺旋导管 52外， 该推杆端盖 92是套设于注射推杆 91的按压端部 912外侧， 内螺旋导 管 52后端的枢接部枢设于推杆端盖 92中。
关于本发明注射器的使用情形， 如图 3及图 6所示， 组装药剂瓶 2 时， 其是在药瓶套壳 30拆下的状态， 将药剂瓶 2具有活塞 2A的一端 伸入接合套环 20内定位， 螺旋推杆 80侧端的活塞顶块 84伸入药剂瓶 2内抵接活塞 2A, 再将药瓶套壳 30套设于药剂瓶 2外侧， 通过药瓶套 壳 30与结合套环 20的结合， 使药剂瓶 2固定于注射器 1中。 未注射 时， 针头 3以及针头盖 4未组设于药瓶套壳 30上组接药剂瓶 2的状态 下， 先将笔盖 5套设于药瓶套壳 30外侧。
准备注射时， 如图 3及图 7所示， 取下笔盖 5， 装上针头 3及针头 盖 4，针头 3—端***药剂瓶 2内，且通过针头盖 4罩盖于针头 3外侧， 避免使用者被针头 3误剌。 其次， 将注射推杆组 90沿轴向朝后直向快 速拉开至预定位置， 直至内螺旋导管 52外周面的螺旋导块 521移动至 接触内套管 40后端限位挡缘 43处卡住停止。在注射推杆组 90后拉的 过程中， 同时带动内螺旋导管 52朝后运动及在外螺旋导管 51 内部产 生空转，内套管 40后端的逆止键 42可于内螺旋导管 52的逆止环纹 522 处产生弹跳而发生声音， 并通过内套管 40后端的逆止键 42抵接于内 螺旋导管 52的逆止环纹 522处限位， 产生阻止注射推杆组 90被误压 而驱动内螺旋导管 52朝前轴向直线运动的功能， 使注射推杆组 90在 朝后拉出的过程中， 不会被误压而回缩。
在注射时， 如图 8及图 9所示， 拔下针头盖， 以针头 3剌入人体 预定注射部位， 再按压注射推杆组 90开始注射， 其中通过直向朝前按 压注射推杆组 90的动作， 并经由推杆端盖 92推动内螺旋导管 52， 其 中，内套管 40后端的逆止键 42进入内螺旋导管 52的轴向导槽 523处， 使内螺旋导管 52可与注射推杆组 90—同朝前直向运动， 同时通过内 螺旋导管 52外周面的螺旋导块 521驱动外螺旋导管 51定点顺向旋转， 直至内螺旋导管 52于外螺旋导管 51完成行进一行程距离， 注射推杆 组 90伸入外壳体 10内闭合， 外螺旋导管 51顺向旋转时一并带动螺接 环 60旋转， 且经由螺接环 60旋转驱动螺旋推杆 80旋转前进而对药剂 瓶 2内的活塞 2A施以推力， 使药剂瓶 2内的药剂通过针头 3输出。
前述中， 通过外螺旋导管 51内部预定行程距离的螺旋导槽 514与 内螺旋导管 52外周面的螺旋导块 521的配合， 以及装设于外螺旋导管 51中的螺接环 60螺接螺旋推杆 80的配合，使按压注射推杆组 90—次 仅能直向推进该预定行程的距离， 并带动螺接环 60驱动螺旋推杆 80 同动旋转一圈即停止， 进而控制药剂瓶 2输出设定的注射剂量。 另一 方面， 通过外螺旋导管 51的螺旋导槽 514与内螺旋导管 52的螺旋导 块 521 的大螺距行程组合构造， 搭配螺接环 60的螺孔与螺旋推杆 80 的螺纹为小螺距行程组合构造， 而以大行程旋转推力转换为小行程旋 转的注射推力， 使该注射器 1在使用过程中具有省力的功效。
在注射完毕后， 先将针头盖 4套合于针头 3外侧， 再自注射器 1 一同拔下针头 3与针头盖 4， 将笔盖 5盖合于注射器 1的药瓶套壳 30 外侧， 确保下一次使用， 皆能更换新的针头 3使用。 该注射器 1在使 用时， 通过注射推杆组 90结合单向棘轮 70、 双向螺旋导引管组 50、 螺接环 60与螺旋推杆 80的连动机构发明， 使其在每一次定量注射的 操作过程中， 能以循环开闭方式便于使用者的操作使用。 另外利用螺 旋推杆 80的剂量控制段 81外周面的螺纹圈数与螺距依药剂瓶 2内的 药剂容量设定注射次数以及注射剂量， 使该注射器 1 具备固定剂量注 射与自动计次使用的功能。 当该装设有药剂瓶 2的注射器 1使用次数 到达预定次数时，药剂瓶 2内的药剂正好用尽，此时，即丢弃注射器 1， 避免该注射器 1被过度使用。
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， 任何本领域技术人员， 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

权利要求书
1、 一种注射器， 所述注射器是用以结合药剂瓶与针头使用， 其特 征在于， 所述注射器包含：
一外护壳， 其是一前端与后端形成开口的中空体；
一接合套环， 其组设于外护壳前端， 该接合套环内部具有一内环 部， 该内环部中形成一具有多个单斜向棘齿的单向棘齿槽；
一药瓶套壳， 其组接于接合套环前端， 用以将所述药剂瓶固定其 中， 药瓶套壳前端能够供所述针头能够拆组地套组其上；
一内套管， 其装设于外护壳内， 该内套管前端固定于接合套环内； 一双向螺旋导引管组， 其包含一外螺旋导管与一内螺旋导管， 外 螺旋导管装设于内套管内， 所述外螺旋导管包含有一螺管部以及一形 成于螺管部前端的管端， 螺管部内周壁形成一螺旋导槽， 管端外周面 形成多个单斜向棘齿弹片， 所述棘齿弹片分别抵接于接合套环的单向 棘齿槽的单斜向棘齿上， 使外螺旋导管仅能单向旋转， 所述内螺旋导 管装设于内套管与外螺旋导管内， 内螺旋导管前段外周面设有多个螺 旋导块， 螺旋导块置入外螺旋导管的螺旋导槽， 使内螺旋导管能够在 外螺旋导管中旋转行进一预定行程距离， 内螺旋导管后段内部形成一 具有多个单斜向棘齿的单向棘齿槽；
一螺接环， 其组设定位于外螺旋导管的管端中， 该螺接环中形成 一螺孔；
一单向棘轮， 其装设于内螺旋导管的单向棘齿槽中， 该单向棘轮 包含一轮体以及多个形成于轮体外周面的单斜向棘齿弹片， 轮体中形 成一中孔， 所述单斜向棘齿弹片与所述单向棘齿槽中的单斜向棘齿相 啮合；
一螺旋推杆， 其包含有一剂量控制段， 在剂量控制段外周面设有 螺纹， 螺旋推杆中形成轴孔， 螺旋推杆装设于双向螺旋导引管组内， 螺旋推杆的剂量控制段螺接通过螺接环内部， 且用以伸入所述药剂瓶 内施以推力； 以及
一注射推杆组， 其包含一注射推杆与一推杆端盖， 注射推杆包含 一杆体与一设于杆体后端的按压端部， 注射推杆的杆体穿过固接于单 向棘轮的中孔中， 且杆体能够轴向滑移地穿设于螺旋推杆的轴孔中， 注射推杆的杆体后端及按压端部位于内螺旋导管外， 推杆端盖套设于 注射推杆的按压端部外侧， 内螺旋导管后端枢设于推杆端盖中， 使注 射推杆组结合单向棘轮、 双向螺旋导引管组、 螺接环与螺旋推杆能够 循环开闭动作。
2、 根据权利要求 1所述的注射器， 其特征在于， 所述内套管后端 形成一逆止键以及一限位挡缘， 所述内螺旋导管后段外周面形成多个 逆止环纹且设有一预定长度的轴向导槽， 逆止键能够抵止于内螺旋导 管的逆止环纹处阻止内螺旋导管朝前运动， 且逆止键变换至轴向导槽 处， 使内螺旋导管能够被驱动朝前运动， 所述限位挡缘限制内螺旋导 管后移的位置。
3、 根据权利要求 1或 2所述的注射器， 其特征在于， 所述螺旋推 杆的轴孔与注射推杆的杆体形状为相对应的非圆形。
4、 根据权利要求 1或 2所述的注射器， 其特征在于， 所述螺接环 外周面形成一轴向延伸的定位凸部， 所述外螺旋导管的管端内壁形成 定位凹部， 通过相对应的定位凸部与定位凹部的结合， 使螺接环定位 于外螺旋导管的管端内。
5、 根据权利要求 4所述的注射器， 其特征在于， 所述接合套环前 后端分别为一接合环部与一组接环部， 接合环部置入组设于外护壳内， 所述接合套环在内环部与接合环部之间设有多个卡钩， 接合套环在接 合环部与内环部之间装设一内环圈； 所述内套管伸入接合套环内部的 前端设有卡槽， 卡槽提供接合套环的卡钩对应卡入其中， 内环圈套设 于卡钩外侧， 使内套管与接合套环接合固定。
6、 根据权利要求 5所述的注射器， 其特征在于， 所述螺旋推杆的 剂量控制段前端装设一活塞顶块。
PCT/CN2014/074713 2014-04-03 2014-04-03 注射器 WO2015149323A1 (zh)

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