WO2015196421A1 - 注射器的螺旋导引机构 - Google Patents

注射器的螺旋导引机构 Download PDF

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Publication number
WO2015196421A1
WO2015196421A1 PCT/CN2014/080853 CN2014080853W WO2015196421A1 WO 2015196421 A1 WO2015196421 A1 WO 2015196421A1 CN 2014080853 W CN2014080853 W CN 2014080853W WO 2015196421 A1 WO2015196421 A1 WO 2015196421A1
Authority
WO
WIPO (PCT)
Prior art keywords
spiral
screw
push rod
injection
guiding mechanism
Prior art date
Application number
PCT/CN2014/080853
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 PCT/CN2014/080853 priority Critical patent/WO2015196421A1/zh
Publication of WO2015196421A1 publication Critical patent/WO2015196421A1/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

Definitions

  • the present invention relates to a syringe, and more particularly to a screw guiding mechanism of the syringe. Background technique
  • the syringe products are classified into two types, a meter type syringe and a meter type syringe, for the purpose of quantitative injection, counting the number of injections, and the limited re-use of the syringe.
  • a driving mechanism composed of a plurality of driving components is connected in a syringe housing to connect a push rod, thereby installing a medicine bottle in the syringe housing at the front end of the syringe housing.
  • a needle is arranged, and the needle is connected to the medicine bottle.
  • the needle When the needle is injected, the needle penetrates into a predetermined part of the human body, and after pressing the rear end of the push rod, 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 above-mentioned known metering type syringe construction structure can be combined with a medicine bottle to achieve the purpose of quantitatively injecting a medicament.
  • the syringe is limited by the mutual interlocking between the driving components in the driving mechanism of the syringe, which causes the syringe to have troublesome operation when injecting the medicament, and is not convenient for the user to operate. Summary of the invention
  • the technical solution proposed by the present invention is: providing a screw guiding mechanism for a syringe, comprising: a bidirectional spiral guiding tube set comprising an outer helical catheter and an inner helical catheter, the outer helical catheter including a spiral portion and a tube end formed at a front end of the screw portion, a spiral guide groove is formed in the inner peripheral wall of the screw portion, the inner spiral conduit is installed in the outer spiral conduit, and the outer circumferential surface of the inner spiral conduit is provided with a plurality of a spiral guide block, the spiral guide block is inserted into the spiral guide groove of the outer spiral conduit, so that the inner spiral conduit can rotate in the outer spiral conduit for a predetermined stroke distance, and a single oblique ratchet is formed inside the rear portion of the inner spiral conduit One-way ratchet groove;
  • a threaded ring is set in the tube end of the outer spiral conduit, and a screw hole is formed in the threaded ring;
  • a one-way ratchet is installed in the one-way ratchet groove of the inner spiral conduit, the single The ratchet includes a wheel body and a plurality of single oblique ratchet springs formed on the outer circumferential surface of the wheel, and a middle hole is formed in the wheel body, and the single oblique ratchet elastic piece and the seat Engaging a single oblique ratchet in a one-way ratchet groove;
  • a screw pusher comprising a dose control section, is provided with a thread on the outer peripheral surface 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 can be axially slidably disposed in the shaft hole of the screw push rod, the rear end and the pressing end portion of the rod of the injection push rod are located outside the inner spiral duct, and the push rod end cover is sleeved on the injection push rod Outside the pressing end, the rear end of the inner spiral conduit is pivotally disposed in the push rod end cover, and the injection push rod group is combined with the one-way ratchet, the bidirectional spiral guiding tube set, the screw ring and the screw push rod to circulate.
  • the shaft hole of the auger is non-circular corresponding to the shape of the rod of the injection pusher.
  • the outer circumferential surface of the screw ring forms an axially extending positioning convex portion
  • the inner wall of the outer end of the outer spiral conduit forms a positioning concave portion through the corresponding positioning convex portion and
  • the combination of the positioning recesses positions the threaded ring within the tube end of the outer helical catheter.
  • a tip end of the dose control section of the auger is provided with a piston top block.
  • the outer peripheral surface of the outer end of the outer spiral conduit forms a plurality of single oblique ratcheting elastic pieces
  • the helical guiding mechanism further comprises an engaging collar, the inner side of the engaging collar
  • the utility model has an inner ring portion, an engaging ring portion and an inner ring disposed between the engaging ring portion and the inner ring portion, wherein the inner ring portion forms a one-way ratchet groove having a plurality of single oblique ratchet teeth,
  • the ratchet springs of the outer spiral catheter tube end abut against the single oblique ratchets of the one-way ratchet groove of the engaging collar.
  • a non-circular through hole having a limiting edge is formed in the engaging collar, and an outer peripheral surface shape of the cross section of the auger corresponds to a shape of the non-circular through hole, and
  • the positioning edge corresponding to the limiting edge has a spiral push rod which is disposed in the engaging collar and can only move linearly along the axial direction.
  • the engaging collar is provided with a plurality of hooks between the inner ring portion and the engaging ring portion.
  • the engaging ring portion of the engaging collar is a full-circular annular body, and an inner ring is sleeved on the inner side of the engaging ring portion outside the hook.
  • the engaging ring portion of the engaging collar is formed into two radially symmetrically arranged arcuate sheets, and a curved inner gasket is disposed in each of the two curved sheets.
  • the two curved inner gaskets are respectively sleeved on The outer side of the hook forms at least one snap protrusion on the outer peripheral surface of the two curved pieces.
  • the beneficial effect that can be achieved by the invention is that the spiral guiding mechanism is applied to the syringe through the aforementioned screw guiding mechanism, and the spiral guiding mechanism mainly adopts a large pitch stroke combined structure of the bidirectional spiral guiding tube group, and is matched with the screw joint and the screw push rod.
  • the small pitch stroke combined structure converts the direct pressing force of the pressing injection pusher group into a rotating force, and converts the injection thrust to the small stroke rotation through the large stroke rotary thrust, thereby achieving the effect of quantitatively injecting the medicament in a simple and labor-saving manner.
  • FIG. 1 is a perspective exploded view of a preferred embodiment of a screw guiding mechanism of a syringe of the present invention.
  • FIG. 2 is a perspective exploded view of another perspective view of the preferred embodiment of the screw guiding mechanism of FIG. 1.
  • FIG 3 is a perspective exploded view of the preferred embodiment of the screw guiding mechanism of FIGS. 1 and 2 further including a coupling collar.
  • FIGS. 1 to 3 are schematic cross-sectional views showing a preferred embodiment of the screw guiding mechanism shown in FIGS. 1 to 3.
  • Figure 5 is a side cross-sectional view showing the line position A-A of Figure 4.
  • Figure 6 is a side cross-sectional view showing the line position B-B of Figure 4.
  • Fig. 7 is a perspective exploded view showing another preferred embodiment of the joint collar and the two curved inner gaskets and an inner sleeve in the screw guiding mechanism of the syringe of the present invention.
  • Fig. 8 is a perspective view showing the joint collar of Fig. 7 combined with the two arcuate inner spacers for assembling the inner sleeve.
  • Fig. 9 is a perspective exploded perspective view showing another preferred embodiment of the injection pusher set, the one-way ratchet, and the auger in the screw guiding mechanism of the syringe of the present invention.
  • Fig. 10 is a perspective exploded view showing the preferred embodiment of the screw guiding mechanism shown in Figs. 1 and 2 applied to a syringe and a needle and a needle cover.
  • Figure 11 is a perspective exploded perspective view of another preferred embodiment of the preferred embodiment of the helical guide mechanism of Figure 10 and a portion of the syringe.
  • Figure 12 is a cross-sectional view showing the syringe of Figure 10 with the needle and needle cover attached thereto.
  • Figure 13 is a cross-sectional view showing the syringe of Figure 10 without the needle and the needle cover, and the cover is attached.
  • Figure 14 is a side cross-sectional view showing the line position C-C of Figure 13;
  • Figure 15 is a side cross-sectional view showing the line position D-D of Figure 13;
  • Fig. 16 is a schematic cross-sectional view showing the syringe of Fig. 10 with the needle cover removed to initiate injection when the pusher is pressed.
  • the screw guiding mechanism comprises a bidirectional spiral guiding tube set 50, a screwing ring 60, and a screw guiding mechanism.
  • the bidirectional spiral guiding tube set 50 includes an outer spiral tube 51 and an inner spiral tube 52 .
  • the outer spiral tube 51 includes a screw portion 511 .
  • a front end wall 512 and a tube end 513 projecting forward from the end wall 512 are formed at the front end of the tube portion 511.
  • the inner peripheral wall of the screw portion 511 forms a spiral guide groove 514, and the outer peripheral surface of the tube end 513 is formed.
  • the single oblique ratcheting piece 515 is further provided with an axially extending positioning recess 516 on the inner wall of the tube end 513.
  • the inner spiral duct 52 is installed in the outer spiral duct 51 , and the outer peripheral surface of the front section of the inner spiral duct 52 is provided.
  • a plurality of spiral guide blocks 521 are inserted into the spiral guide grooves 514 of the outer spiral conduit 51 by the spiral guide blocks 521, and the inner spiral conduits 52 can be disposed in the outer spiral conduits 51 by the cooperation of the spiral guide blocks 521 and the spiral guide grooves 514.
  • a unidirectional ratchet groove 524 having a plurality of single oblique ratchet teeth is formed in the rear portion of the inner spiral conduit 52, and a rear end portion of the inner spiral conduit 52 forms a pivot portion 525, the inner spiral conduit
  • the pivoting portion 525 of the 52 can extend beyond the rear end of the inner sleeve 40.
  • the outer peripheral surface of the inner portion of the inner spiral conduit 52 is further formed with a plurality of check loops 522, and a predetermined length of the guide groove 523 is provided.
  • the threaded ring 60 is disposed in the tube end 513 of the outer spiral conduit 51 .
  • the threaded ring 60 defines a screw hole 61 , and the pitch of the screw hole 61 is smaller than that.
  • the outer circumferential surface of the threaded ring 60 forms an axially extending positioning protrusion 62 corresponding to the positioning concave portion 516 of the outer spiral conduit 51, so that the threaded ring 60 and the outer spiral conduit 51 are matched. Combine together.
  • the one-way ratchet 70 is mounted in a one-way ratchet groove 524 of the inner spiral conduit 52, and the one-way ratchet 70 includes a wheel body 71. And a plurality of shapes formed on the outer circumferential surface of the wheel body 71
  • the single oblique ratchet spring 72 has a middle hole 73 formed in the wheel body 71.
  • the cross-sectional shape of the middle hole 73 corresponds to the non-circular shaft hole of the screw push rod 80, and the single oblique ratchet spring 72 of the one-way ratchet 70 is The one-way ratchets of the one-way ratchet slots 524 in the inner helical conduit 52 engage.
  • the auger 80 has a dose control section 81, and a thread is arranged on the outer peripheral surface of the dose control section 81, and a middle section of the screw pusher 80 is formed on the side edge of the dose control section 81.
  • the limiting flange 82, the non-circular shaft hole 83 is formed in the screw push rod 80, and 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
  • the inside of the ring 60 can be inserted into a medicament bottle to push against the piston.
  • the front end of the dose control section 81 of the screw pusher 80 is provided with a piston top block 84, and is pushed into the medicament bottle through the piston top block 84. Pistons.
  • the injection pusher set 90 includes an injection pusher 91 and a pusher end cover.
  • the injection pusher 91 includes a rod body 911 and a pressing end portion 912 disposed at a rear end of the rod body 911.
  • the cross-sectional shape of the rod body 911 corresponds to the non-circular shaft hole 83 in the screw push rod 80 and the non-circular shaft hole 70.
  • the injection push rod 91 is axially slidably disposed through the shaft hole 83 of the screw push rod 80, and the rod body 911 is fixed through the middle hole 73 of the one-way ratchet 70,
  • a positioning block 913 is formed on the rod body 911, and the one-way ratchet 70 is fixed to the rod body 911 by the positioning block 913.
  • the rod body 911 of the injection push rod 91 has a rear end of the pressing end portion 912 protruding from the outer spiral duct 52.
  • the push rod end cover 92 is sleeved on the outer side of the pressing end portion 912 of the injection push rod 91, and the pivot portion of the rear end of the inner spiral duct 52 is pivotally disposed in the push rod end cover 92.
  • the non-circular shape of the middle hole 73 of the one-way ratchet 70, the shaft hole 83 of the screw push rod 80, and the rod body 911 of the injection push rod 91 may be a gear shape (as shown in FIG. 2) or a polygon, or the like.
  • One side or diametrically opposite sides have a straight edge shape (as shown in Figure 9) and the like.
  • the screw guiding mechanism further includes a joint collar 20, and the joint collar 20 includes an engaging ring portion 21, a set of ring portions 22 and an inner ring portion.
  • the set ring portion 22 and the joint ring portion 21 are respectively located at the front end and the rear end of the joint collar 20, and the inner ring portion 23 is located inside the joint collar 20, and the inner ring portion 23 is formed with a plurality of A one-way ratchet groove 24 with a single oblique ratchet.
  • the engaging collar 20 is further provided with a plurality of hooks 25 between the inner ring portion 23 and the engaging ring portion 21, and the tube end 513 of the outer spiral conduit 51 extends into the inner ring portion 23 of the engaging collar 20,
  • the ratcheting elastic pieces 515 of the outer peripheral surface of the outer end of the outer spiral conduit 51 abut against the single oblique ratchets of the one-way ratchet groove 24 of the engaging collar 20, so that the outer spiral conduit 51 can only rotate in one direction.
  • the auger 80 is threaded into the engagement collar 20 and is only linearly movable in the axial direction.
  • a non-circular through hole 27 having a limiting edge 271 is formed in the engaging collar 20, and the outer peripheral surface shape of the cross section of the auger 80 corresponds to the shape of the non-circular through hole 27. And having a positioning edge 85 corresponding to the limiting edge 271, so that the screw push rod 80 It is worn in the joint collar 20 and can only move linearly in the axial direction.
  • the engaging ring portion 21 of the engaging collar 20 is a full-circle annular body, and an inner ring ring 26 can be coupled to the inner side of the engaging ring portion 21.
  • a snap ring groove 210 is formed on the outer peripheral surface of the engaging ring portion 21 on the outer side of the hook 25.
  • the engaging ring portion 21 of the engaging collar 20 is formed into two radially symmetrically disposed curved sheets 211, and the two curved shaped bodies 211 are formed.
  • Each of the arc-shaped inner spacers 260 is disposed on the outer side of the hooks 25 for assembling an inner sleeve 40, and at least one latching protrusion 212 is formed on the outer peripheral surface of the two curved sheet bodies 211 for An outer casing is snap-fitted.
  • the syringe 1 shown in FIG. 10 and FIG. 11 is taken as an example.
  • the syringe 1 further includes an outer casing 10 and a vial sleeve.
  • FIG. 10 and FIG. 11 wherein the engaging collar 20 is placed in the outer casing 10 , and the vial casing 30 is detachably assembled to the engaging collar 20 .
  • the front end as shown in FIG. 10 and FIG. 12, is used for fixing a medicine bottle 2, wherein a front end of the medicine bottle casing 30 is provided with a set of needles 3, and the inner sleeve 40 is mounted on the outer guard.
  • the front end of the inner sleeve 40 is assembled to engage the collar 20, and is engaged in the slot 41 of the front end of the inner sleeve 40 by the hook 25 in the engaging collar 20, and the engaging collar 20 is combined.
  • An inner ring ring 26 (or two arc-shaped blocks) is sleeved on the outer side of the hook 25 to fix the inner sleeve 40 and the joint collar 20, and the outer casing 10 is snap-fitted to the outside of the joint collar 20
  • the rear end of the inner sleeve 40 extends out of the outer casing 10, and the bidirectional spiral guiding tube set 50 is installed in the inner sleeve 40.
  • the rear end of the inner spiral duct 52 of the bidirectional spiral guiding tube set 50 protrudes. Outside the rear end of the inner sleeve 40, the rear end of the inner sleeve 40 has a check button 42 and a backstop ring 522 and an axial direction of the rear portion of the inner spiral conduit 52.
  • the position between the guide grooves 523 is changed.
  • the inner spiral duct 52 can move forward in the axial direction, and when the check button 42 abuts against the reverse loop of the inner spiral duct 52, At 522, the inner spiral conduit 52 can be prevented from being inadvertently moved linearly toward the front axial direction.
  • the rear end of the inner sleeve 40 also has a limit retaining edge 43 for limiting the position of the inner spiral conduit 52 to move backward.
  • the threaded ring 60 is mounted in the tube end 513 of the outer spiral conduit 51, and the positioning of the screw ring 60 with the outer circumferential surface of the positioning convex portion 62 and the outer spiral conduit 51
  • the recess 516 is mated so that the threaded ring 60 is coupled to the outer spiral conduit 51.
  • the tube end 513 of the outer spiral conduit 51 also extends into the engagement collar 20.
  • the outer spiral conduit 51 abuts the one-way spine in the engagement collar 20 with its ratcheting elastic piece 515, respectively.
  • the single oblique ratchet of the gullet 24 allows the outer helical catheter 51 to rotate only in one direction.
  • the one-way ratchet 70 is mounted in the one-way ratchet groove 524 of the inner spiral conduit 52. As shown in FIG. 15, the one-way ratchet 70 has a single oblique ratchet on the outer circumferential surface of the wheel body 71. One-way ratchet of the one-way ratchet groove 524 inside the rear portion of the inner piece of the inner spiral conduit 52 Engaged.
  • the auger 80 is mounted in the inner spiral conduit 51 of the bidirectional helical guiding tube set 50, and the auger 80 has a threaded dose control section 81.
  • a front end of the dose control section 81 of the screw pusher 80 is provided with a piston top block 84, and the screw push rod 80 is pushed against the piston 2A in the medicament bottle 2 via the piston top block 84.
  • the injection push rod 91 of the injection pusher set 90 can be axially slidably disposed in the shaft hole 83 in the screw push rod 80, and is disposed in the one-way ratchet 70, the injection push rod
  • the one-way ratchet 70 is fixed by a positioning stopper 913 on the rod body thereof, and the injection push rod 91 has a rear end of the pressing end portion 912 protruding outside the inner spiral duct 52, and the push rod end cover 92 is sleeved on
  • the outer side of the pressing end portion 912 of the injection pusher 91 is pivotally connected to the push rod end cover 92 to constitute a syringe 1.
  • the syringe 1 having the screw guiding mechanism is in use, as shown in FIG. 13, when the medicine bottle 2 is assembled, the medicine bottle 2 has one end of the piston 2A in a state where the medicine bottle casing 30 is detached. Positioned in the engagement collar 20, 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 the vial sleeve 30 is sleeved on the outside of the medicament bottle 2, through the vial sleeve 30 and The drug bottle 2 is fixed in the syringe 1 in conjunction with the combination of the collars 20. As shown in FIG. 13, when the needle 3 and the needle cover 4 are not assembled on the vial casing 30, the medicine bottle 2 is assembled, and the pen cover 5 can be first set on the vial case. 30 outside.
  • the pen cover 5 When preparing for injection, as shown in Figs. 12 and 13, the pen cover 5 is removed, and the needle 3 and the needle cover 4 are attached. One end of the needle 3 is inserted into the drug bottle 2, and the needle cover 4 is covered on the outside of the needle 3 to avoid use. The person was mistakenly stabbed 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. As shown in FIG.
  • the inner spiral conduit 52 is driven to move backward and the inner spiral conduit 51 is idly rotated, and the check button 42 at the rear end of the inner sleeve 40 can be inside.
  • the back of the loop 522 of the spiral conduit 52 is bouncing to generate sound, and the check button 42 at the rear end of the inner sleeve 40 abuts against the limit of the back loop 522 of the inner spiral conduit 52, thereby preventing the injection pusher from being generated.
  • the function of the group 90 being depressed to drive the inner spiral conduit 52 to move linearly forwardly causes the injection pusher set 90 to be retracted without being crushed during the backward pulling process.
  • the needle cover 4 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 is pressed by the straight forward direction.
  • the action of the set 90, and the inner helical catheter 52 is pushed via the pusher end cap 92, wherein the check button 42 at the rear end of the inner cannula 40 enters the axial guide groove 523 of the inner helical catheter 52, allowing the inner helical catheter 52 to be injected
  • the pusher group 90 is directly moved forwardly, and the outer spiral conduit 51 is driven to rotate in the forward direction by the spiral guide block 521 of 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.
  • the injection pusher set 90 extends into the outer casing 10 Closed.
  • 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 to the vial cover of the syringe 1.
  • the outside of the shell 30 ensures that the next needle can be replaced with a new needle.
  • the syringe 1 is combined with the one-way ratchet 70, the bidirectional spiral guiding tube set 50, the screwing ring 60 and the auger 80 by the injection pusher set 90 during use.
  • the linkage mechanism is invented to enable a labor-saving operation mode in which a large-stroke rotary thrust is converted into a small-stroke rotation injection thrust during each quantitative injection operation, and is combined with a cyclic opening and closing mode for the user to operate.
  • the number of threads and the pitch of the outer peripheral surface of the dose control section 81 of the screw pusher 80 are used to set the number of injections and the injection dose according to the drug volume in the vial 2, so that the syringe 1 is provided with fixed dose injection and automatic counting.
  • the function When the number of uses of the syringe 1 containing the drug bottle 2 reaches a predetermined number of times, the medicine in the drug bottle 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

一种注射器的螺旋导引机构，包含有双向螺旋导引管组（50）、螺接环（60）、单向棘轮（70）、螺旋推杆（80）与注射推杆组（90），双向螺旋导引管组（50）包含外螺旋导管（51）与螺接于外螺旋导管（51）内的内螺旋导管（52），螺接环（60）组设于外螺旋导管（51）内，单向棘轮（70）组设于内螺旋导管（52）的单向棘齿槽（524）中，螺旋推杆（80）装设于双向螺旋导引管组（50）内且螺接螺接环（60）中，注射推杆组（90）以注射推杆（91）穿设于单向棘轮（70）中且能轴向滑移地穿设于螺旋推杆（80），当其应用于注射器中，该螺旋导引机构能利用双向螺旋导引管组（50）的大螺距行程组合构造，搭配螺接头与螺旋推杆（80）间的小螺距行程组合构造，使按压注射推杆组（90）的直向按压力量转换为旋转力量，经由大行程旋转推力转换至小行程旋转的注射推力，以省力的简便操作方式达到定量注射药剂的目的。

Description

注射器的螺旋导引机构
技术领域
本发明是关于一种注射器， 尤指该注射器的螺旋导引机构。 背景技术
目前公知的注射器产品， 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， 注射器产品区分有计量型注射器与计次型注射器两种型式。 其中， 计量型注射器产品的组成构造中， 其主要是于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， 于注射器外壳前 端装设针头， 针头连接药剂瓶， 于注射时， 针头刺入人体预定部位， 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。
前述公知的计量型注射器组成构造， 虽能够结合药剂瓶达到定量注射药剂的目的。 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中各驱动部件间连动 的相互牵制， 造成该注射器在注射药剂时有操作费力的问题， 不便于使用者操作使用。 发明内容
本发明的目的是提供一种注射器的螺旋导引机构，用以改善现有计量型注射器操作 费力的问题。
本发明所提出的技术解决方案是： 提供一种注射器的螺旋导引机构， 其包含- 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， 所述外螺旋导管包含 有一螺管部以及一成形于螺管部前端的管端， 螺管部内周壁形成一螺旋导槽， 所述内螺 旋导管装设于外螺旋导管内， 所述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， 使内螺旋导管能于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， 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， 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 个成形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， 其包含一剂量控制段， 于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， 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动作。
如上所述的注射器的螺旋导引机构中，所述螺旋推杆的轴孔与所述注射推杆的杆体 形状为相对应的非圆形。
如上所述的注射器的螺旋导引机构中，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。
如上所述的注射器的螺旋导引机构中，所述螺旋推杆的剂量控制段前端装设一活塞 顶块。
如上所述的注射器的螺旋导引机构中，所述外螺旋导管的管端外周面形成多个单斜 向棘齿弹片， 所述螺旋导引机构还包含一接合套环， 该接合套环内部具有一内环部、一 接合环部以及一设于接合环部与内环部之间的内环圈，该内环部中形成一具有多个单斜 向棘齿的单向棘齿槽，所述外螺旋导管管端的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。
如上所述的注射器的螺旋导引机构中，所述接合套环中形成一具有限位边的非圆形 通孔， 螺旋推杆断面的外周面形状对应于非圆形通孔的形状， 并具有相应于限位边的定 位边， 螺旋推杆穿设于接合套环中仅能沿轴向直线移动。
如上所述的注射器的螺旋导引机构中，所述接合套环于内环部与接合环部之间设有 多个卡钩。
如上所述的注射器的螺旋导引机构中， 所述接合套环的接合环部为全圆周的环形 体， 于接合环部内侧结合一内环圈套设于卡钩外侧。
如上所述的注射器的螺旋导引机构中，所述接合套环的接合环部是形成两径向对称 设置的弧形片体， 于该两弧形片体内各设置一弧形内垫片， 该两弧形内垫片分别套设于 卡钩外侧， 于该两弧形片体外周面形成至少一卡接凸块。
本发明可达成的有益功效是， 通过前述螺旋导引机构应用于注射器中， 该螺旋导引 机构主要是利用双向螺旋导引管组的大螺距行程组合构造，搭配螺接头与螺旋推杆间的 小螺距行程组合构造， 使按压注射推杆组的直向按压力量转换为旋转力量， 经由大行程 旋转推力转换至小行程旋转的注射推力， 以省力的简便操作方式达到定量注射药剂的功 效。 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是本发明注射器的螺旋导引机构的一较佳实施例的立体分解示意图。
图 2是图 1所示螺旋导引机构较佳实施例另一观视角度的立体分解示意图。
图 3是图 1及图 2所示螺旋导引机构较佳实施例进一步包含一接合套环的立体分解 示意图。
图 4是图 1至图 3所示螺旋导引机构较佳实施例的组合剖面示意图。
图 5是图 4所示剖切线位置 A-A的侧视剖面示意图。
图 6是图 4所示剖切线位置 B-B的侧视剖面示意图。
图 7是本发明注射器的螺旋导引机构中的接合套环另一较佳实施例与两弧形内垫片 及一内套管的立体分解示意图。
图 8是图 7所示接合套环结合两弧形内垫片组接内套管的立体示意图。
图 9是本发明注射器的螺旋导引机构中的注射推杆组、单向棘轮以及螺旋推杆的另 一较佳实施例立体分解示意图。
图 10是图 1及图 2所示螺旋导引机构较佳实施例应用于注射器中与针头、 针头盖 的立体分解示意图。
图 11是图 10所示螺旋导引机构较佳实施例与注射器中的部分部件的另一观视角度 的立体分解示意图。
图 12是图 10所示注射器装上针头与针头盖时的剖面示意图。
图 13是图 10所示注射器未装上针头及针头盖， 另盖上笔盖时的剖面示意图。 图 14是图 13所示剖切线位置 C-C的侧视剖面示意图。
图 15是图 13所示剖切线位置 D-D的侧视剖面示意图。
图 16是图 10所示注射器拔下针头盖， 于按压推杆开始注射时的剖面示意图。 附图简单说明- 1注射器 2药剂瓶 2A活塞 3针头
4针头盖
10外护壳 11结合端 20接合套环 21接合环部 210卡接环槽 211弧形片体 212卡接凸块
22组接环部 23内环部 24单向棘齿槽 25卡钩
26内环圈 260弧形内塾片 27非圆形通孔 271限位边 30药瓶套壳
40内套管 41卡槽 42逆止键 43限位挡缘
50双向螺旋导引管组 51外螺旋导管
51 1螺管部 512环端壁
513管端 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 85定位边 86凸缘
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及图 2所示， 是揭示本发明注射器的螺旋导引机构的一较佳实施例， 所述螺 旋导引机构是包含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。
如图 1、 图 2及图 4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包含一螺管部 511， 所述螺管部 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， 所述螺管部 511内周壁形成一螺旋导 槽 514， 所述管端 513中外周面形成多个单斜向棘齿弹片 515， 所述管端 513内壁还设 有一轴向延伸的定位凹部 516。
如图 1、 图 2及图 4所示， 前述双向螺旋导引管组 50中， 所述内螺旋导管 52是装 设于所述外螺旋导管 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能于外螺旋导管 51中旋转行进一预定行程距离， 所述内螺旋 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， 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。 于本较佳实施 例中，所述内螺旋导管 52后段外周面还形成多个逆止环纹 522，并设有一预定长度的轴 向导槽 523。
如图 1、 图 2及图 4所示， 所述螺接环 60是装设于外螺旋导管 51的管端 513中， 所述螺接环 60中成一螺孔 61， 螺孔 61的螺距小于所述外螺旋导管 51的螺旋导槽 514 的螺距。 于本较佳实施例中， 所述螺接环 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、 图 2、 图 4及图 5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以及多个成形于轮体 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截面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与所述内螺旋导管 52中的单向棘齿 槽 524的单向棘齿相啮合。
如图 1、 图 2及图 4所示， 所述螺旋推杆 80具有一剂量控制段 81， 于剂量控制段 81外周面设有螺纹， 螺旋推杆 80中段于剂量控制段 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， 并能伸入一药剂瓶内推抵活塞， 或者， 所述螺旋推杆 80的剂量控制段 81前端装设一活塞顶块 84， 通过活塞顶块 84推抵所述 药剂瓶内的活塞。
如图 1、 图 2及图 4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 截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。
所述单向棘轮 70的中孔 73、 螺旋推杆 80的轴孔 83以及注射推杆 91的杆体 911 的非圆形形状可为齿轮形（如图 2所示）或多边形等， 也可为一侧或径向相对的两侧具 有直边的形状 （如图 9所示） 等。
如图 3、 图 4及图 6所示， 所述螺旋导引机构还包含一接合套环 20， 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， 所述内环部 23位于接合套环 20的内部， 所述 内环部 23中形成一具有多个单斜向棘齿的单向棘齿槽 24。 所述接合套环 20于内环部 23与接合环部 21之间还设有多个卡钩 25， 所述外螺旋导管 51的管端 513伸入接合套 环 20的内环部 23中， 所述外螺旋导管 51管端 513外周面的棘齿弹片 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。 所述 螺旋推杆 80是穿设于接合套环 20中， 并仅能沿轴向直线移动。 于本较佳实施例中， 所 述接合套环 20中形成一具有限位边 271的非圆形通孔 27，螺旋推杆 80断面的外周面形 状对应于非圆形通孔 27的形状， 并具有相应于限位边 271的定位边 85， 使螺旋推杆 80 穿设于接合套环 20中， 仅能沿轴向直线移动。
如图 3及图 4所示， 于本较佳实施例中， 所述接合套环 20的接合环部 21为全圆周 的环形体， 于接合环部 21 内侧还可结合一内环圈 26套设于卡钩 25外侧， 于接合环部 21外周面形成一卡接环槽 210。 如图 7及图 8所示的另一较佳实施例中， 所述接合套环 20的接合环部 21是形成两径向对称设置的弧形片体 211， 于该两弧形片体 211 内各设 置一弧形内垫片 260套设于卡钩 25外侧， 用以组接一内套管 40， 于该两弧形片体 211 外周面形成至少一卡接凸块 212， 用以与一外护壳卡接组合。
本发明螺旋导引机构应用于注射器时， 以图 10及图 11所示的注射器 1为例， 所述 注射器 1除了所述螺旋导引机构外， 还包含有一外护壳 10、 一药瓶套壳 30、 一内套管 40以及一笔盖 5， 所述注射器 1是用以结合药剂瓶 2与针头 3、 针头盖 4一起使用。
请配合参阅图 10及图 11所示， 其中， 是以所述接合套环 20置入组设于外护壳 10 内部， 所述药瓶套壳 30可拆组地组设于接合套环 20前端， 如图 10、 及图 12所示， 用 以将一药剂瓶 2固定其中， 所述药瓶套壳 30前端提供一针头 3套组其上， 所述内套管 40装设于外护壳 10内部， 所述内套管 40前端组接接合套环 20， 并通过接合套环 20内 的卡钩 25卡接于内套管 40前端的卡槽 41中，所述接合套环 20结合一内环圈 26 (或两 弧形垫块）套设于卡钩 25外侧， 将内套管 40与接合套环 20予以固定， 外护壳 10套合 卡接于接合套环 20外侧， 所述内套管 40后端伸出外护壳 10外， 所述双向螺旋导引管 组 50装设于内套管 40内，所述双向螺旋导引管组 50的内螺旋导管 52后端伸出内套管 40后端外， 所述内套管 40后端具有逆止键 42能于所述内螺旋导管 52后段的逆止环纹 522与轴向导槽 523之间变换位置。其中，如图 15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， 当逆止键 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。 所述内套管 40后端还具 有限位挡缘 43， 用以限制内螺旋导管 52后移的位置。
如图 10至图 11所示， 所述螺接环 60装设于外螺旋导管 51的管端 513中， 该螺接 环 60以其外周面的定位凸部 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。所述外螺旋导管 51的管端 513还伸入接合套环 20中， 如图 14所示， 所述外螺旋导管 51以其棘齿弹片 515分别抵接于接合套环 20中的单向 棘齿槽 24的单斜向棘齿上， 使外螺旋导管 51仅能单向旋转。 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， 如图 15所示， 所述单向棘轮 70以其轮体 71外周面的单斜向棘齿弹片 72与内螺旋导管 52后段内部的单向棘齿槽 524的单向棘齿 相啮合。
如图 10、图 11及图 13所示，所述螺旋推杆 80装设于双向螺旋导引管组 50的内螺 旋导管 51内， 所述螺旋推杆 80以其具有螺纹的剂量控制段 81贯穿螺接螺接环 60， 所 述螺旋推杆 80的剂量控制段 81前端设有一活塞顶块 84，螺旋推杆 80经由活塞顶块 84 推抵药剂瓶 2内的活塞 2A。 再以所述注射推杆组 90中的注射推杆 91能轴向滑移地穿 设于螺旋推杆 80中的轴孔 83中， 并穿设于单向棘轮 70中， 所述注射推杆 91以其杆体 上的定位挡块 913将单向棘轮 70予以固定，所述注射推杆 91具有按压端部 912的后端 伸出内螺旋导管 52外， 所述推杆端盖 92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， 而组成一注射器 1。
前述具有螺旋导引机构的注射器 1于使用情形， 如图 13所示， 于组装药剂瓶 2时， 是在药瓶套壳 30拆下的状态下， 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， 将药剂瓶 2固定于注射器 1中。 如图 13所示， 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， 可先将所述笔盖 5套设于药瓶套壳 30外侧。
准备注射时， 如图 12及图 13所示， 取下笔盖 5， 装上针头 3及针头盖 4， 针头 3 一端插入药剂瓶 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误刺。 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。 如图 12所示， 于注射推杆组 90后拉的过程中， 同时带动内螺旋导管 52朝后运动及于外螺旋导管 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。
如图 16及图 17所示， 在注射过程中， 拔下针头盖 4， 以针头 3刺入人体预定注射 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。 其中， 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。
如图 16及图 17所示， 前述中， 其是通过外螺旋导管 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于使用过程中具有省力的功效。
如图 12所示， 当注射完毕后， 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。
如图 16及图 17所示， 所述注射器 1于使用过程中， 其是通过注射推杆组 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， 能以大行程旋转推力转换为小行程旋转的注射推力的 省力操作方式， 再搭配循环开闭方式以便于使用者操作使用。另外， 还利用螺旋推杆 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

权利要求书
1、 一种注射器的螺旋导引机构， 其特征在于， 其包含：
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， 所述外螺旋导管包含 有一螺管部以及一成形于螺管部前端的管端， 所述螺管部内周壁形成一螺旋导槽， 所述 内螺旋导管装设于外螺旋导管内， 所述内螺旋导管前段外周面设有多个螺旋导块， 所述 螺旋导块置入所述外螺旋导管的螺旋导槽，使所述内螺旋导管能于外螺旋导管中旋转行 进一预定行程距离， 所述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， 是组设定位于所述外螺旋导管的管端中， 所述螺接环中形成一螺孔； 一单向棘轮， 是装设于所述内螺旋导管的单向棘齿槽中， 所述单向棘轮包含一轮体 以及多个成形于轮体外周面的单斜向棘齿弹片， 所述轮体中形成一中孔， 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， 其包含一剂量控制段， 于所述剂量控制段外周面设有螺纹， 所述螺旋 推杆中形成轴孔， 所述螺旋推杆是装设于所述双向螺旋导引管组内， 所述螺旋推杆的剂 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， 所述注射推杆包含一杆体与一设 于杆体后端的按压端部， 所述注射推杆的杆体穿过固接于单向棘轮的中孔中， 且所述杆 体能轴向滑移地穿设于螺旋推杆的轴孔中，所述注射推杆的杆体后端及按压端部位于内 螺旋导管外， 所述推杆端盖套设于注射推杆的按压端部外侧， 所述内螺旋导管后端枢设 于推杆端盖中， 所述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 能循环动作。
2、 根据权利要求 1所述的注射器的螺旋导引机构， 其特征在于， 所述螺旋推杆的 所述轴孔与所述注射推杆的杆体形状为相对应的非圆形。
3、 根据权利要求 1所述的注射器的螺旋导引机构， 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， 使所述螺接环定位于所述外螺旋导管的管端内。
4、 根据权利要求 2所述的注射器的螺旋导引机构， 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的内壁形成定位凹部， 通过相对 应的定位凸部与定位凹部的结合， 使所述螺接环定位于所述外螺旋导管的管端内。
5、 根据权利要求 4所述的注射器的螺旋导引机构， 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。
6、 根据权利要求 1至 5中任一项所述的注射器的螺旋导引机构， 其特征在于， 所 述外螺旋导管的管端外周面形成多个单斜向棘齿弹片，所述螺旋导引机构还包含一接合 套环， 所述接合套环内部具有一内环部、 一接合环部以及一设于接合环部与内环部之间 的内环圈， 所述内环部中形成一具有多个单斜向棘齿的单向棘齿槽， 所述外螺旋导管管 端的棘齿弹片分别抵接于所述接合套环的单向棘齿槽的单斜向棘齿上。
7、 根据权利要求 6所述的注射器的螺旋导引机构， 其特征在于， 所述接合套环中 形成一具有限位边的非圆形通孔，所述螺旋推杆断面的外周面形状对应于所述非圆形通 孔的形状， 并具有相应于所述限位边的定位边， 所述螺旋推杆穿设于所述接合套环中仅 能沿轴向直线移动。
8、 根据权利要求 7所述的注射器的螺旋导引机构， 其特征在于， 所述接合套环于 所述内环部与所述接合环部之间设有多个卡钩。
9、 根据权利要求 8所述的注射器的螺旋导引机构， 其特征在于， 所述接合套环的 接合环部为全圆周的环形体，于所述接合环部内侧结合一所述内环圈套设于所述卡钩外
10、 根据权利要求 8所述的注射器的螺旋导引机构， 其特征在于， 所述接合套环的 接合环部是形成两径向对称设置的弧形片体， 于两所述弧形片体内各设置一弧形内垫 片， 两所述弧形内垫片分别套设于所述卡钩外侧， 于两所述弧形片体外周面形成至少一 卡接凸块。
PCT/CN2014/080853 2014-06-26 2014-06-26 注射器的螺旋导引机构 WO2015196421A1 (zh)

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