WO2021217390A1 - 注射器 - Google Patents

注射器 Download PDF

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Publication number
WO2021217390A1
WO2021217390A1 PCT/CN2020/087378 CN2020087378W WO2021217390A1 WO 2021217390 A1 WO2021217390 A1 WO 2021217390A1 CN 2020087378 W CN2020087378 W CN 2020087378W WO 2021217390 A1 WO2021217390 A1 WO 2021217390A1
Authority
WO
WIPO (PCT)
Prior art keywords
sleeve
housing
guide
metering
cassette
Prior art date
Application number
PCT/CN2020/087378
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/CN2020/087378 priority Critical patent/WO2021217390A1/zh
Priority to EP20933928.2A priority patent/EP4144391A4/en
Priority to JP2022565845A priority patent/JP7394498B2/ja
Priority to US17/920,901 priority patent/US20230181831A1/en
Publication of WO2021217390A1 publication Critical patent/WO2021217390A1/zh

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Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—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
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M5/2422—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic using emptying means to expel or eject media, e.g. pistons, deformation of the ampoule, or telescoping of the ampoule
    • 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
    • A61M5/31541—Means preventing setting of a dose beyond the amount remaining in the cartridge
    • 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
    • A61M5/31543—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose piston rod reset means, i.e. means for causing or facilitating retraction of piston rod to its starting position during cartridge change
    • 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
    • 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
    • A61M5/3156—Mechanically operated dose setting member using volume steps only adjustable in discrete intervals, i.e. individually distinct intervals
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31578—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod
    • A61M5/3158—Constructional features or modes of drive mechanisms for piston rods based on axial translation, i.e. components directly operatively associated and axially moved with plunger rod performed by axially moving actuator operated by user, 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
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31593—Multi-dose, i.e. individually set dose repeatedly administered from the same medicament reservoir
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2403—Ampoule inserted into the ampoule holder

Definitions

  • the invention relates to a syringe, in particular to a syringe that can assemble a medicine bottle to perform quantitative output of medicine liquid for multiple times, and can be replaced with another full medicine bottle for reuse after the medicine liquid is completely used up.
  • the syringe is based on the safety regulations for drug solution injection, and the existing syringe has the function of being repeatedly used for a limited number of times.
  • Existing syringes are generally divided into two types: metering syringes and counting syringes.
  • the metering syringe uses the push rod that presses the back end of the syringe to pass the internal The linkage of the pushing mechanism pushes the piston in the medicine bottle to move a certain stroke distance, and then outputs a quantitative medicine liquid through the needle head connected to the front end of the medicine bottle.
  • the existing metering type injection pen can achieve the function of quantitatively outputting medicament solution, or further has the function of labor-saving operation, but after the medicament in the assembled medicament bottle of the existing syringe is used up, the pushing mechanism in the syringe is not With the function of returning to the original state, the existing syringes are discarded and cannot be reused.
  • the technical problem to be solved by the present invention is to provide a syringe to solve the problem that the existing metered syringe cannot be restored to the initial state for reuse after use.
  • the technical solution proposed by the present invention is to provide a syringe which can detachably assemble a drug bottle with a drug solution and a needle component connected to the front end of the drug bottle, wherein the syringe defines a front and rear shaft A central axis extending to the direction and the syringe includes an injection mechanism, the injection mechanism has an injection mode and a standby mode, and the syringe can be manually triggered to perform the conversion between the injection mode and the standby mode, the injection mechanism includes:
  • a screw pushing assembly that can be installed in the movable space of the housing in a spiral movement along the direction of the central axis, the screw pushing assembly extends outside the rear end of the housing, and the screw pushing assembly can be pressed to produce Spiral force
  • a metering guide sleeve can be installed in the housing rotatably at a fixed point, and the metering guide sleeve is inserted in the screw pushing assembly, and the metering guide sleeve can be controlled to rotate together with the screw pushing assembly, the metering guide
  • the sleeve includes a guide sleeve body and a plurality of backstop ratchet snap buckles.
  • the guide sleeve body has a guide sleeve middle hole and at least one spiral part located on the inner peripheral wall of the guide sleeve middle hole.
  • the outer periphery of the rear section of the guide sleeve body A threaded portion of the guide sleeve is formed on the surface, the front end of the guide sleeve body has a front end of the guide sleeve, and a plurality of check ratchet buckles are formed on the outer surface of the front end of the guide sleeve.
  • a total quantity control nut which can be installed in the screw pushing assembly to move linearly along the direction of the central axis, and the total quantity control nut is screwed to the threaded part of the guide sleeve at the rear section of the metering guide sleeve;
  • a diagonal button which can be movably installed in the front end of the housing along the direction of the central axis, the diagonal button can be driven to change the non-return ratchet spring buckle relative to the one-way ratchet portion of the housing To switch between the injection mode and the standby mode;
  • a metering screw which penetrates the diagonal button and the housing, and the metering screw is screwed in the metering guide sleeve
  • the metering screw includes a screw body with a screw thread portion, and the screw body uses the screw
  • the threaded part is screwed and matched with the spiral part in the metering guide sleeve.
  • the front end of the screw body protrudes in front of the oblique tension button.
  • the spiral movement of the metering guide sleeve can drive the metering screw in the housing along the central axis. It moves linearly in the direction to perform quantitative output of the medicament solution of the medicament bottle.
  • the metering screw can move linearly backward along the central axis and retract into the housing.
  • the syringe includes a cassette sleeve with an accommodating space penetrating along the direction of the central axis, the cassette sleeve can be detachably assembled with the medicine bottle, and The front end of the cassette sleeve can be detachably assembled with the needle component, the cassette sleeve can be assembled at the front end of the casing of the injection mechanism, and the cassette sleeve can trigger the diagonal tension button to move backward and drive multiple A backstop ratchet buckle engages with the one-way ratchet part of the housing to present the injection mode, and when the cassette sleeve is removed from the front end of the housing of the injection mechanism, the diagonal expansion button can move forward to make the backstop
  • the ratchet spring buckle is separated from the unidirectional ratchet part of the housing to be in the standby mode.
  • the cartridge cover includes a cartridge body, the peripheral wall of the cartridge body is provided with at least one viewing window, the rear end of the cartridge body has a connecting part, and the peripheral wall of the cartridge body is on the peripheral wall of the cartridge body.
  • the front end of the connecting portion has a limiting flange, the outer peripheral surface of the connecting portion forms a plurality of clamping protrusions, the front end of the housing is a box-sleeve connecting portion, and the inner peripheral wall of the box-sleeve connecting portion forms a plurality of L-shaped clips
  • the L-shaped clamping groove includes a straight groove section parallel to the central axis and a transverse section connected to the rear end of the straight groove section.
  • the rear end of the cassette sleeve is inserted into the front end of the housing
  • the clamping protrusion can move along the straight groove section of the L-shaped clamping groove, and then screw into the end of the transverse section for positioning, so that the cassette sleeve is assembled and positioned there.
  • the front end of the housing is inserted into the front end of the housing.
  • a guide ring is provided inside the front end of the housing, the outer peripheral surface of the guide ring is connected to the peripheral wall of the movable space with a plurality of arms, and there is a distance between the guide ring and the peripheral wall of the movable space.
  • the inner ring wall of the guide ring is provided with at least one guide protrusion; the screw body of the metering screw has at least one shaft guide groove passing through the screw thread part and parallel to the central axis, and the shaft guide groove is connected to the guide ring of the housing
  • the inner guide bumps are matched.
  • the front end surface of the check ratchet snap button has a wing projecting forward, and the conical curved surface of the oblique expansion button contacts the fin of the check ratchet snap button to make the cone of the oblique expansion button
  • the curved surface can push the backstop ratchet snap buckle to engage the unidirectional ratchet part of the shell through the wing.
  • the syringe includes a cassette sleeve with an accommodating space penetrating along the direction of the central axis, the cassette sleeve can be detachably assembled with the medicine bottle, and The front end of the cassette sleeve can be detachably assembled with the needle parts, the cassette sleeve can be assembled at the front end of the casing of the injection mechanism, and the cassette sleeve can trigger the diagonal tension button to move backward to drive a plurality of The one-way ratchet part of the non-return ratchet buckle engages with the shell in the injection mode.
  • the diagonal expansion button can move forward to make the non-stop ratchet buckle
  • the one-way ratchet part of the housing is separated to be in the standby mode.
  • the cartridge cover includes a cartridge body, the peripheral wall of the cartridge body is provided with at least one viewing window, the rear end of the cartridge body has a connecting part, and the peripheral wall of the cartridge body is on the peripheral wall of the cartridge body.
  • the front end of the connecting portion has a limiting flange, the outer peripheral surface of the connecting portion forms a plurality of clamping protrusions, the front end of the housing is a box-sleeve connecting portion, and the inner peripheral wall of the box-sleeve connecting portion forms a plurality of L-shaped clips
  • the L-shaped clamping groove includes a straight groove section parallel to the central axis and a transverse section connected to the rear end of the straight groove section.
  • the rear end of the cassette sleeve is inserted into the front end of the housing
  • the clamping protrusion can move along the straight groove section of the L-shaped clamping groove, and then screw into the end of the transverse section for positioning, so that the cassette sleeve is assembled and positioned there.
  • the front end of the housing is inserted into the front end of the housing.
  • the inner peripheral wall of the housing has at least one spiral guide bar;
  • the spiral push assembly includes a drive solenoid, a clutch sleeve, and an output button;
  • the drive solenoid is helically installed in the active space of the housing, and the drive solenoid has a solenoid channel penetrating along the direction of the central axis.
  • the front end section of the solenoid channel is formed from back to front.
  • a guide curved surface inclined to the central axis, the outer peripheral wall of the drive solenoid forms a drive spiral guide groove, and the drive spiral guide groove is screwed with the spiral guide bar of the housing, and the rear end of the drive solenoid has a The rear end of the solenoid, the rear end of the solenoid protrudes outside the rear end of the housing, and the rear end of the solenoid can be limited by the rear end of the housing;
  • the clutch sleeve is inserted in the solenoid channel of the drive solenoid and the clutch sleeve can move linearly with respect to the drive solenoid.
  • the clutch sleeve includes a sleeve body, and a A plurality of elastic buckle claws, and a set of connecting ends located at the rear end of the sleeve body, the sleeve body is formed with a sleeve channel extending along the direction of the central axis, and the peripheral wall of the sleeve channel has a peripheral wall parallel to At least one set of tube guide groove portion of the central shaft, a plurality of elastic buckle claws have the elasticity that can radially expand and contract, when the clutch sleeve moves forward relative to the drive solenoid, the plurality of elastic buckle claws It can be radially folded by pushing the guide curved surface of the front end of the driving solenoid, and a plurality of elastic clasps can spring back to the original position along the guide curved surface to
  • the output button is located outside the rear of the housing, and the output button is pivotally connected to the assembly end of the rear end of the clutch sleeve;
  • the metering guide sleeve penetrates through the driving solenoid and the inside of the clutch sleeve, and the metering guide sleeve can be clamped by a plurality of elastic hooks of the clutch sleeve;
  • the outer peripheral surface of the total volume control nut has at least one flange, and the flange is matched with the sleeve guide groove portion of the clutch sleeve.
  • the inner surface of the elastic buckle claw is a buckling surface, and the buckling surface has a plurality of straight stripes extending along the front-rear direction;
  • the guide sleeve body of the metering guide sleeve is attached to the guide sleeve
  • the outer peripheral surface between the front end portion and the threaded portion of the guide sleeve forms a joint surface, the joint surface has a plurality of straight stripes parallel to the central axis, and the straight stripes of the joint surface engage with the elastic clasp The straight stripes on the face match.
  • the rear section of the peripheral wall of the housing is provided with a scale viewing window
  • the outer peripheral wall of the drive solenoid forms a spiral scale portion parallel to the drive spiral guide groove
  • the spiral scale portion has a plurality of scale lines , And can display the scale line of the spiral scale part through the scale viewing window of the casing.
  • the beneficial effect that can be achieved by the present invention is that when the syringe is in use, the injection mechanism can not be connected to the medicament bottle at its front end, and through the overall composition of the syringe, the injection mechanism can be manually triggered to execute the injection mode and The conversion of the standby mode, in which, when the tilt button of the injection mechanism is triggered and moved backward, it can drive a plurality of backstop ratchet snaps to engage the one-way ratchet part of the housing to form an injection mode, so that it has Multi-quantitative output function of medicament solution.
  • the injection mechanism can manually trigger the diagonal expansion button to move forward, so that the backstop ratchet snap buckle can be disengaged
  • the one-way ratchet part of the shell is in the standby mode, so that the metering screw can be directly manually pushed back to the original position, and the metering guide sleeve is driven to rotate in the reverse direction, and the total amount control nut is pushed back to the metering guide sleeve.
  • the initial full-volume position of the syringe enables the syringe to be reused.
  • the syringe of the present invention can further use the cassette sleeve to perform the conversion of the injection mode and the standby mode on the injection mechanism as the trigger element.
  • the diagonal button can be automatically pushed to move backwards to drive the plurality of backstop ratchet snaps to engage the unidirectional ratchet part of the casing in an injection mode, and the cassette is set in the self-injection mechanism
  • the diagonal expansion button can move forward, so that the backstop ratchet snap buckle is separated from the one-way ratchet part of the housing and is in a standby mode.
  • the syringe of the present invention can further provide a guide ring inside the front end of the housing, a distance between the guide ring and the peripheral wall of the movable space, and the guide ring is provided with at least one guide protrusion on the inner ring wall; the metering
  • the screw body of the screw has an axial guide groove that passes through the screw thread portion and is parallel to the central axis.
  • the user When the liquid is used up, the user removes the cassette sleeve and the medicine bottle in it from the front end of the housing, and when the backstop ratchet buckle of the metering guide sleeve is separated from the one-way ratchet part of the housing and its backstop function is released, the metering screw will
  • the shaft guide groove can be positioned to align with the position of the guide protrusion in the guide ring of the housing, so that the metering screw that originally protruded from the housing can be pushed back to the original position directly along the direction of the central axis, and drive the metering guide sleeve in the reverse direction Rotate and push the total amount control nut back to the initial full position of the metering guide sleeve along the direction of the central axis to improve its ease of use.
  • the syringe of the present invention can further enable the screw pushing assembly to include a drive solenoid, a clutch sleeve, and an output button; wherein the drive solenoid is screwed in the housing so as to be capable of spiral movement, and the drive solenoid is mounted on its screw.
  • the front section of the tube channel forms a guiding curved surface
  • the clutch sleeve can spirally traverse through the solenoid channel of the drive solenoid
  • the rear end of the clutch sleeve extends outside the rear end of the housing and is assembled with the output button
  • the clutch sleeve is provided with a plurality of elastic buckle claws at the front end of the sleeve body, and the plurality of elastic buckle claws have the elasticity of radial expansion and contraction.
  • the two elastic claws can be pushed by the guide curved surface at the front end of the drive solenoid to fold and clamp the metering guide sleeve radially, so that the metering guide sleeve, the clutch sleeve and the driving solenoid can rotate together, and a plurality of elastic buckles
  • the metering guide sleeve can spring back to the original position along the guide curved surface to open and release the metering guide sleeve, so that the clutch between the metering guide sleeve and the screw pushing assembly has good smoothness and accuracy of action.
  • the syringe of the present invention can further be provided with a scale viewing window on the peripheral wall of the housing, the outer peripheral wall of the drive solenoid forms a spiral scale portion parallel to the drive spiral guide groove, the spiral scale portion has a plurality of scale lines, and The scale line of the spiral scale part can be displayed through the scale viewing window of the housing, so that the driving solenoid can have both driving and dose scale display functions with a single component.
  • Fig. 1 is an exploded schematic view of a preferred embodiment of the syringe of the present invention using a cassette sleeve as a trigger element, and a medicament bottle, a needle component, and the like.
  • Fig. 2 is a schematic side view of the injection mechanism after the cartridge sleeve of the preferred embodiment of the syringe shown in Fig. 1 is assembled with a medicament bottle.
  • Fig. 3 is a perspective exploded schematic view of the injection mechanism shown in Figs. 1 and 2.
  • Fig. 4 is a three-dimensional exploded schematic view of the injection mechanism shown in Figs. 1 and 2 from another viewing angle.
  • Fig. 5 is a schematic front plan view of the housing in the injection mechanism shown in Figs. 3 and 4.
  • Fig. 6 is a schematic front plan view of the injection mechanism shown in Figs. 3 and 4.
  • Fig. 7 is a schematic cross-sectional view at the position of the cut line A-A shown in Fig. 6.
  • Fig. 8 is a schematic cross-sectional view of the position of the cut line B-B shown in Fig. 6.
  • Fig. 9 is a perspective schematic view of the injection mechanism shown in Figs. 3 and 4 with the casing removed.
  • Fig. 10 is a perspective schematic view of the injection mechanism shown in Figs. 3 and 4 with the casing removed from another viewing angle.
  • FIG. 11 is a partial three-dimensional schematic diagram of the combination of the clutch sleeve and the metering sleeve in the injection mechanism shown in FIGS. 3 and 4.
  • Fig. 12 is a front cross-sectional schematic view of the combined form of the housing and the metering sleeve in the injection mechanism shown in Figs. 3 and 4.
  • Fig. 13 is a reference diagram of an implementation state of an unassembled injection mechanism after the cartridge sleeve of the preferred embodiment of the syringe shown in Fig. 1 is assembled with a medicament bottle.
  • Fig. 14 is a reference diagram of an implementation state in which a cartridge set containing a medicine bottle and an injection component is set at the front end of the injection mechanism in the preferred embodiment of the syringe shown in Fig. 13.
  • Fig. 15 is a reference diagram of an implementation state in which the screw pushing assembly in the injection mechanism shown in Fig. 14 is pulled out from the rear end of the housing toward the rear.
  • Fig. 16 is a reference diagram of an implementation state in which the screw pushing assembly in the injection mechanism shown in Fig. 15 is pressed forward to perform a drug solution output and injection action.
  • FIG. 17 is a reference diagram of an implementation state of the injection mechanism shown in FIG. 16 when it completes one-time execution of a drug solution output injection action.
  • Fig. 18 is a reference diagram of an implementation state in which the screw pushing assembly in the injection mechanism shown in Fig. 17 is pulled out again from the rear end of the housing.
  • 19 is a schematic plan view of the syringe of the present invention after all the medicament solution in the medicament bottle has been injected.
  • FIG. 20 is a reference diagram of an implementation state in which the syringe shown in FIG. 19 removes the empty medicine bottle and the outer cassette cover from the front end of the injection mechanism.
  • Fig. 21 is a schematic plan view showing that the metering screw in the injection mechanism shown in Fig. 20 is pushed back to make the injection mechanism return to the initial state.
  • the syringe of the present invention can be assembled with a medicament bottle 3 filled with a medicament liquid and a needle part 3A connected to the front end of the medicament bottle 3, providing a A device used to perform the function of medicament injection.
  • the medicine bottle 3 and the needle part 3A are all known objects.
  • the medicine bottle 3 is also equipped with a piston 3C that pushes the medicine liquid out.
  • the syringe of the present invention mainly includes an injection mechanism 2.
  • the injection mechanism 2 has an injection mode and a standby mode.
  • the injection mechanism 2 can be directly triggered manually by the user or indirectly through a trigger element. Manually trigger to execute the conversion of the injection mode and the standby mode.
  • the syringe uses a cassette sleeve 1 as a trigger element for changing the mode of the injection mechanism 2, and the cassette sleeve 1 is combined with the front end of the injection mechanism 2 to trigger the injection mechanism 2 Switch from the standby mode to the injection mode.
  • the trigger element used to trigger the mode change of the injection mechanism 2 is not limited to the aforementioned cassette cover 1.
  • the syringe of the present invention defines a central axis A extending forward and backward axially.
  • the injection mechanism 2 includes a housing 20, a screw pushing assembly 2A, a metering guide sleeve 60, a total volume control nut 70, an oblique tension button 80, and One metering screw 90.
  • the structure of each of the aforementioned components is described below.
  • the housing 20 has an active space 200 penetrating along the direction of the central axis A, and a unidirectional ratchet portion 23 is formed in the active space 200 of the housing 20,
  • the one-way ratchet portion 23 has a plurality of single-oblique ratchet teeth, and the plurality of single-oblique ratchet teeth are arranged rotationally symmetrically with respect to the predetermined forward rotation direction of the central axis A, and the front end of the housing 20 can be detached and assembled.
  • a guide ring 22 is further provided in the movable space 200 of the housing 20 in front of the one-way ratchet portion 23.
  • the guide ring 22 and the peripheral wall of the movable space 200 There is a gap between.
  • the outer peripheral surface of the guide ring 22 is connected to the peripheral wall of the movable space 200 through a plurality of arms 24, so that a predetermined distance is maintained between the guide ring 22 and the peripheral wall of the movable space 200.
  • At least one guiding protrusion 221 is provided on the inner ring wall.
  • the inner ring wall of the guide ring 22 is provided with two guide protrusions 221 that are radially symmetric with respect to the central axis A.
  • the casing 20 is provided with one or more spiral guide bars 25 on the peripheral wall of the rear section of the movable space 200.
  • the screw pushing assembly 2A is installed in the active space 200 of the housing 20 to be helically movable along the direction of the central axis A, and the screw pushing assembly 2A extends The outer side of the rear end of the housing 20 can be pressed to generate a spiral propulsion force.
  • the screw pushing assembly 2A includes a driving solenoid 30, a clutch sleeve 40 and an output button 50.
  • the drive solenoid 30 is helically installed in the active space of the housing 20, and the drive solenoid 30 has a penetrating tube along the direction of the central axis A.
  • a solenoid channel 31 of the solenoid channel 31, the front end section of the solenoid channel 31 forms a guide curved surface 32 inclined from rear to front to the central axis A, that is, the solenoid channel 31 is located at the front end section of the drive solenoid 30 formed by the rear The curved surface with decreasing caliber forward.
  • the outer peripheral wall of the drive solenoid 30 forms a drive spiral guide groove 33, the pitch of the drive spiral guide groove 33 is set according to the size of the predetermined injection dose of the syringe, and the drive spiral guide groove 33 and the housing 20
  • the spiral guide bar 25 is screwed together.
  • the rear end of the drive solenoid 30 has a solenoid rear end portion 34 with a larger outer diameter. The end 34 can be restricted by the rear end of the housing 20 to limit its moving stroke.
  • the peripheral wall of the housing 20 is provided with a scale viewing window 26, the outer peripheral wall of the drive solenoid 30 forms a spiral scale portion 35 parallel to the drive spiral guide groove 33, the spiral scale portion 35 has a plurality of scale lines (not shown in the figure), and the scale lines of the spiral scale portion 35 can be displayed through the scale viewing window 26 of the housing 20, and the driving solenoid 30 has both driving and dose scale display functions.
  • the clutch sleeve 40 passes through the solenoid channel 31 of the drive solenoid 30 and can move linearly relative to the drive solenoid 30.
  • the clutch sleeve 40 includes a sleeve body 41, a plurality of elastic locking claws 42 arranged at the front end of the sleeve body 41, and a set of connecting ends 43 located at the rear end of the sleeve body 41.
  • the sleeve body 41 is A sleeve channel 44 extending from front to back along the direction of the central axis A is formed, the peripheral wall of the sleeve channel 44 has at least one sleeve guide groove 45 parallel to the central axis, and the plurality of elastic claws 42 It has the flexibility of radial expansion and contraction.
  • the plurality of elastic buckle claws 42 can be pushed by the guide curved surface 32 at the front end of the driving solenoid 30. It can be folded toward the rear, and can spring back to the original position along the guide curved surface 32 to expand.
  • the inner surface of the elastic buckle 42 is a buckling surface 421, and the buckling surface 421 has a plurality of straight stripes extending along the front-to-rear direction.
  • the output button 50 is located outside the rear end of the housing 20, and the output button 50 is pivotally connected to the assembly end 43 of the rear end of the clutch sleeve 40, and the output button 50 is used to provide a user-operated component.
  • the metering guide sleeve 60 can be pivoted in the housing 20 to be able to rotate at a fixed point, and passes through the drive solenoid 30 and the clutch sleeve 40, and It can be selectively clamped by a plurality of elastic buckle claws 42 of the clutch sleeve 40.
  • the guide curved surface 32 of the drive solenoid 30 drives the elastic buckle claws 42 of the clutch sleeve 40 to fold and clamp the metering guide sleeve 60,
  • the metering guide sleeve 60, the clutch sleeve 40 and the drive solenoid 30 can rotate together.
  • the metering guide sleeve 60 includes a guide sleeve body 61 and a plurality of backstop ratchet snaps 62.
  • a guide sleeve middle hole 63 penetrates in the direction of the central axis A.
  • the guide sleeve body 61 has a guide sleeve front end 64 at the front end.
  • the guide sleeve front end 64 is pivotally connected to the guide ring 22 of the housing 20, and the guide sleeve middle hole 63 is located
  • the inner peripheral wall of the section of the front end portion 64 of the guide sleeve has at least one spiral portion 65.
  • the outer peripheral surface of the rear section of the guide sleeve body 61 forms a guide sleeve thread portion 66.
  • the thread pitch of the guide sleeve thread portion 66 is smaller than that of the driving screw.
  • the guide sleeve body 61 forms a joint surface 67 on the outer peripheral surface between the guide sleeve front end 64 and the guide sleeve threaded portion 66.
  • the joint surface 67 has a plurality of straight stripes parallel to the central axis A.
  • the joint surface 67 The straight stripes match the straight stripes of the buckling surface 421 of the elastic buckle pawl 42.
  • the plurality of backstop ratchet spring buckles 62 are formed on the outer surface of the front end portion 64 of the guide sleeve, and the multiple backstop ratchet spring buckles 62 All are curved and arranged rotationally symmetrically with respect to the predetermined forward rotation direction of the central axis A, and the plurality of backstop ratchet snap buckles 62 can be controlled to be clutched with the unidirectional ratchet portion 23 of the housing 20.
  • the check ratchet buckle 62 engages the one-way ratchet portion 23 of the housing 20
  • the metering guide sleeve 60 can only be driven to rotate in the forward direction but not in the reverse direction, that is, the injection mode is in the injection mode.
  • the backstop function is released, and the metering guide sleeve 60 can freely rotate in the forward or reverse direction, that is, it assumes the standby mode.
  • the front end surface of the backstop ratchet spring buckle 62 has a wing 621 protruding forward.
  • the total amount control nut 70 is mounted in the solenoid channel 31 of the drive solenoid 30 to be linearly movable along the central axis A, and the total amount The control nut 70 is screwed to the metering guide sleeve 60, and the total length of the total amount of control nut 70 that can move on the threaded portion 66 of the metering guide sleeve 60 corresponds to the piston 3C in the medicine bottle 3
  • the movable distance is used to control the total amount of liquid medicine that the medicine bottle 3 can output.
  • the total amount control nut 70 has an inner screw hole and is screwed on the guide sleeve thread portion 66 of the rear section of the guide sleeve body 61 of the metering guide sleeve 60.
  • the total amount control nut 70 The outer peripheral surface has a flange 71, and the flange 71 is matched with the sleeve guide groove 45 in the sleeve passage 44 of the clutch sleeve 40.
  • the diagonal tensioning button 80 is movably installed in the front end of the housing 20 along the central axis A, and the diagonal tensioning button 80 can be driven to change
  • the backstop ratchet snap 62 changes the injection mode and the standby mode relative to the clutch state of the one-way ratchet portion 23 of the housing 20.
  • the diagonal button 80 is installed in the casing joint 21 at the front end of the housing 20, and the diagonal button 80 passes through the peripheral wall of the movable space 200 at the front end of the housing 20 and the guide ring 22 In the space between the outer peripheral edges, the diagonal stretch button 80 has an inner hole 81 penetrating along the central axis A, and the diagonal stretch button 80 has a conical curved surface 82 whose size increases from back to front.
  • the diagonal tension button 80 can drive the metering guide sleeve 60 to stop by the radial diagonal thrust of the conical surface 82
  • the ratchet snap 62 expands radially, so that the check ratchet snap 62 engages with the one-way ratchet portion 23 of the housing 20.
  • the backstop ratchet spring buckle 62 can be separated from the one-way ratchet portion 23 of the housing 20 by its own elastic folding, and can push against the conical curved surface 82 of the diagonal tension button 80 The diagonal tension button 80 is displaced forward to reset.
  • the metering screw 90 passes through the diagonal button 80 and the guide ring 22 of the housing 20, and the metering screw 90 is screwed into the metering guide sleeve 60 , And can be driven to move linearly along the direction of the central axis A
  • the metering screw 90 includes a screw body 91 and a screw front end portion 92 provided at the front end of the screw body 91.
  • the outer circumference of the screw body 91 has a screw thread portion 93 , And has at least one axial guide groove 94 passing through the screw thread portion 93 and parallel to the central axis A.
  • the screw thread portion 93 is threadedly fitted with the spiral portion 65 in the guide sleeve front end 64 of the metering guide sleeve 60.
  • the shaft guide groove 94 is matched with the guide protrusion 221 in the guide ring 22 of the housing 20.
  • the front end portion of the screw rod 92 is located in front of the guide ring 22 of the housing 20 and in front of the diagonal button 80, so that the spiral movement of the metering guide sleeve 60 can drive the metering
  • the screw 90 moves linearly in the direction of the central axis A in the housing 20 to push against the piston 3C in the medicine bottle 3 to perform quantitative output of the medicine liquid of the medicine bottle 3.
  • the injection mechanism 2 When the injection mechanism 2 is in the standby mode, it extends
  • the metering screw 90 outside the front end of the housing 20 can be rectilinearly moved backward along the direction of the central axis A and retracted into the housing 20.
  • the cassette sleeve 1 has an accommodating space 100 penetrating along the direction of the central axis A, and the cassette sleeve 1 includes a sleeve body 10, and the front end of the sleeve body 10 It has a needle coupling portion 11, and the rear end of the cassette body 10 has a connecting portion 12, the accommodating space 100 forms openings at both the front and rear ends of the cassette sleeve 1, and the medicine bottle 3 can be assembled and disassembled.
  • the needle part 3A is detachably sleeved on the needle coupling portion 11, and the connecting portion 12 at the rear end of the cassette body 10 can be detachably connected to the injection mechanism 2 .
  • the needle coupling portion 11 is provided with threads on the outer peripheral surface, the needle component 3A is screwed and assembled on the needle coupling portion 11, and
  • the peripheral wall of the casing body 10 has a limiting flange 13 at the front end of the connecting portion 12.
  • One or more viewing windows 14 communicating with the accommodating space 100 can be further provided on the peripheral wall of the cartridge case body 10 to provide a user with a view of the pharmaceutical liquid capacity of the pharmaceutical bottle 3 in the cartridge case 1.
  • the front end of the casing 20 has a casing joint 21, and the connection portion 12 at the rear end of the casing 1 is detachably connected to the casing joint of the casing 20
  • the combined structure between the sleeve connecting portion 21 at the front end of the casing 20 and the connecting portion 12 at the rear end of the cassette sleeve 1 can be a combination structure such as a snap connection or a screw connection.
  • the combination structure is disclosed
  • the combination structure between the cartridge sleeve connecting portion 21 at the front end of the housing 20 and the connecting portion 12 at the rear end of the cassette sleeve 1 is a snap-on combination structure, wherein a plurality of cards are formed on the outer peripheral surface of the connecting portion 12 at the rear end of the cassette sleeve 1.
  • Connecting the protrusions 15, a plurality of L-shaped clamping grooves 211 are formed on the inner peripheral wall of the box-sleeve joint 21 at the front end of the housing 20.
  • the L-shaped clamping grooves 211 include straight groove sections parallel to the central axis A and connected to The transverse section at the rear end of the straight groove section, when the connecting portion 12 at the rear end of the cassette sleeve 1 is inserted into the cassette sleeve joint 21 at the front end of the housing 20, the clamping protrusion 15 moves along the straight groove section of the L-shaped clamping groove 211 Afterwards, the cassette cover 1 is rotated by an angle, and the clamping protrusion 15 is clamped and positioned at the end of the transverse section of the L-shaped clamping groove 211, so that the cassette cover 1 is fixed to the front end of the housing 20.
  • the syringe may further include a protective cover 4, which can be sleeved on the outer side of the cassette sleeve 1 containing the drug bottle 3 and the needle part 3A to protect the drug containing the needle part Bottle 3, in addition, the needle part 3A can also be sheathed with a needle sheath 3B to prevent the needle from being exposed and ensure the safety of use.
  • a protective cover 4 which can be sleeved on the outer side of the cassette sleeve 1 containing the drug bottle 3 and the needle part 3A to protect the drug containing the needle part Bottle 3, in addition, the needle part 3A can also be sheathed with a needle sheath 3B to prevent the needle from being exposed and ensure the safety of use.
  • the connecting portion 12 at the rear end of the cassette sleeve 1 is inserted into the sleeve coupling portion 21 at the front end of the casing 20 of the injection mechanism 2 to be combined, and passes through the limit of the cassette sleeve 1.
  • the positioning flange 13 abuts against the front end of the housing 20, and at the same time, the rear end of the cassette sleeve 1 is used to push the diagonal expansion button 80 to move backward, and then the conical surface 82 of the diagonal expansion button 80 is used to push against the measuring guide sleeve 60.
  • the reverse ratchet spring buckle 62 radially expands and engages with the one-way ratchet portion 23 of the housing 20 to form an injection mode, and the metering setting mode of the syringe is turned on.
  • the metering screw 90 The axial guide groove 94 is located at the position aligned with the guide protrusion 221 in the guide ring 22 of the housing 20.
  • the metering screw 90 that originally protrudes from the housing 20 is pushed back to the original position directly along the direction of the central axis, and at the same time passes through the metering
  • the guide sleeve 60 rotates in the reverse direction, and pushes the total amount control nut 70 back along the direction of the central axis A to the initial full position of the metering guide sleeve 60. In this way, the syringe can be reused repeatedly.

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Abstract

一种注射器，其包括一注射机构（2），用以可拆组地连接药剂瓶（3），注射机构（2）能被手动触发变换注射模式与备用模式，注射机构（2）包括外壳（20）、螺旋推送组件（2A）、计量导套（60）、总量管制螺帽（70）、斜张钮（80）及计量螺杆（90），注射机构（2）连接药剂瓶（3）后能变换至注射模式，具备多次药剂液定量输出功能，注射器于药剂瓶（3）内所有药剂液用完后，使用者能将药剂瓶（3）自外壳（20）前端拆下，注射机构（2）能变换至备用模式，使计量导套（60）的逆止棘轮弹扣（62）能脱离外壳（20）的单向棘轮部（23）而解除逆止功能，计量螺杆（90）即能朝后推回原位，同时驱动计量导套（60）逆向旋转，并将总量管制螺帽（70）朝后推回至计量导套（60）的起始满量位置，使注射器能重复再使用。

Description

注射器 技术领域
本发明涉及一种注射器，尤指一种能组装药剂瓶多次执行药剂液定量输出，且于药剂液完全用完后，能够重新换装另一满量药剂瓶重复再利用的注射器。
背景技术
注射器基于药剂液注射的安全规范，现有的注射器已具备有限次数的重复使用的功能。现有的注射器概区分有计量型注射器与计次型注射器两种类型，就现有的计量型注射器而言，计量型注射器于组装药剂瓶后，利用按压注射器后端的推杆动作，通过内部的推送机构的连动来推动药剂瓶内的活塞移动一定行程距离，进而通过连接于药剂瓶前端针头部输出定量的药剂液。
现有计量型注射笔虽能达到定量输出药剂液的功能，或进一步具备操作省力的功能，但是，现有注射器于其所组装的药剂瓶中的药剂用完后，因注射器中的推送机构不具备重回起始状态的功能，造成现有注射器均丢弃处理，无法重复再利用。
发明内容
本发明所要解决的技术问题是：提供一种注射器，解决现有计量型注射器于使用后，无法重新回复至初始状态再利用的问题。
本发明所提出的技术解决方案是：提供一种注射器，其能拆组地组接具有药剂液的一药剂瓶与连接于该药剂瓶的前端的一针头部件，其中，该注射器定义有前后轴向延伸的一中心轴且该注射器包括一注射机构，该注射机构具备一注射模式与一备用模式，并且该注射器能被手动触发而执行该注射模式与该备用模式的变换，该注射机构包括：
一外壳，其具有沿着该中心轴的方向贯通的一活动空间，该外壳的前端能拆组地连接所述药剂瓶，该外壳的活动空间的前段周壁形成一单向棘轮部；
一螺旋推送组件，其能沿着该中心轴的方向螺旋运动地装设于该外壳的活动空间中，该螺旋推送组件伸出该外壳的后端外侧，并且该螺旋推送组件能被按压而产生螺旋推进力量；
一计量导套，其能定点旋转地装设于该外壳中，且该计量导套穿设于该螺旋推送组件中，并且该计量导套能受控结合该螺旋推送组件一同旋转，该计量导套包括一导套本 体以及多个逆止棘轮弹扣，该导套本体中具有一导套中孔以及位于该导套中孔的内周壁的至少一螺旋部，该导套本体的后段外周面形成一导套螺纹部，该导套本体的前端具有一导套前端部，多个逆止棘轮弹扣成形于该导套前端部的外侧面，当多个逆止棘轮弹扣受控啮合该外壳的单向棘轮部时，该计量导套仅能被驱动顺向旋转而呈所述注射模式，当所述逆止棘轮弹扣脱离该外壳的单向棘轮部时，该计量导套能顺向与逆向旋转而呈所述备用模式；
一总量管制螺帽，其能沿着该中心轴的方向直线运动地装设于螺旋推送组件内，且该总量管制螺帽螺接于该计量导套后段的导套螺纹部；
一斜张钮，其能沿着该中心轴的方向移动地装设于该外壳的前端内，该斜张钮能被带动而改变所述逆止棘轮弹扣相对于该外壳的单向棘轮部的离合状态而变换该注射模式与该备用模式；以及
一计量螺杆，其穿设于该斜张钮与该外壳内，且该计量螺杆螺设于该计量导套内，该计量螺杆包括具有螺杆螺纹部的一螺杆本体，并且该螺杆本体以该螺杆螺纹部与该计量导套内的螺旋部螺接配合，该螺杆本体的前端伸出该斜张钮的前方，该计量导套的螺旋运动能驱动该计量螺杆于该外壳中沿着中心轴的方向直线移动，用以执行所述药剂瓶的药剂液定量输出，当该注射机构处于备用模式时，该计量螺杆能沿着该中心轴朝后直线运动地收合至该外壳内。
如上所述的注射器中，该注射器包括一卡匣套，该卡匣套中具有沿该中心轴的方向贯通的一容置空间，该卡匣套能拆组地组设所述药剂瓶，且该卡匣套的前端能拆组地组接所述针头部件，该卡匣套能组设于该注射机构的外壳的前端，且该卡匣套能触发该斜张钮朝后移动并带动多个逆止棘轮弹扣啮合该外壳的单向棘轮部呈该注射模式，且在该卡匣套自注射机构的外壳的前端拆下时，该斜张钮能朝前移动，使所述逆止棘轮弹扣脱离该外壳的单向棘轮部而呈该备用模式。
如上所述的注射器中，该卡匣套包括一匣套本体，该匣套本体的周壁设有至少一观视窗，该匣套本体的后端具有一连接部，该匣套本体的周壁于该连接部的前端具有一限位凸缘，该连接部的外周面形成多个卡接凸粒，该外壳的前端为一匣套结合部，该匣套结合部的内周壁形成多个L形卡接槽，所述L形卡接槽包括平行于该中心轴的一直槽段与连接于该直槽段的后端的一横向段，该卡匣套的后端的连接部置入该外壳的前端的匣套结合部内部时，所述卡接凸粒能沿着所述L形卡接槽的直槽段移动，再旋入所述横向段的末端定位，使该卡匣套组接定位于该外壳的前端。
如上所述的注射器中，该外壳的前端内部设有一导环，该导环的外周面以多个支臂连接该活动空间的周壁，该导环与该活动空间的周壁之间具有间距，该导环的内环壁设有至少一导引凸块；该计量螺杆的螺杆本体具有至少一通过该螺杆螺纹部且平行该中心轴的轴向导槽，所述轴向导槽与该外壳的导环内的导引凸块配合。
如上所述的注射器中，所述逆止棘轮弹扣的前端面具有朝前凸伸的一翼片，该斜张钮的圆锥曲面接触逆止棘轮弹扣的翼片，使该斜张钮的圆锥曲面能通过所述翼片推动所述逆止棘轮弹扣啮合该外壳的单向棘轮部。
如上所述的注射器中，该注射器包括一卡匣套，该卡匣套中具有沿该中心轴的方向贯通的一容置空间，该卡匣套能拆组地组设所述药剂瓶，且该卡匣套的前端能拆组地组接所述针头部件，该卡匣套能组设于该注射机构的外壳前端，且该卡匣套能触发该斜张钮朝后移动而带动多个逆止棘轮弹扣啮合该外壳的单向棘轮部呈该注射模式，当该卡匣套自注射机构的外壳前端拆下时，该斜张钮能朝前移动，使所述逆止棘轮弹扣脱离该外壳的单向棘轮部而呈该备用模式。
如上所述的注射器中，该卡匣套包括一匣套本体，该匣套本体的周壁设有至少一观视窗，该匣套本体的后端具有一连接部，该匣套本体的周壁于该连接部的前端具有一限位凸缘，该连接部的外周面形成多个卡接凸粒，该外壳的前端为一匣套结合部，该匣套结合部的内周壁形成多个L形卡接槽，所述L形卡接槽包括平行于该中心轴的一直槽段与连接于该直槽段的后端的一横向段，该卡匣套的后端的连接部置入该外壳的前端的匣套结合部内部时，所述卡接凸粒能沿着所述L形卡接槽的直槽段移动，再旋入所述横向段的末端定位，使该卡匣套组接定位于该外壳的前端。
如上所述的注射器中，该外壳的内周壁具有至少一螺旋导条；该螺旋推送组件包括一驱动螺管、一离合套管及一输出钮；其中：
该驱动螺管能螺旋运动地装设于该外壳的活动空间中，该驱动螺管内具有沿着该中心轴的方向贯通的一螺管通道，该螺管通道的前端区段形成由后朝前偏向该中心轴倾斜的一导引曲面，该驱动螺管的外周壁形成一驱动螺旋导槽，且该驱动螺旋导槽与该外壳的螺旋导条螺合，该驱动螺管的后端具有一螺管后端部，该螺管后端部伸出该外壳的后端外侧，且该螺管后端部能受到该外壳的后端的限位；
该离合套管穿设于该驱动螺管的螺管通道中且该离合套管能相对于该驱动螺管直线运动，该离合套管包括一套管本体、设于该套管本体的前端的多个弹性扣爪，以及位于该套管本体的后端的一组接端部，该套管本体中形成沿着该中心轴的方向延伸的一套 管通道，该套管通道的周壁具有平行于该中心轴的至少一套管导引槽部，多个弹性扣爪具有能径向张开与内缩的弹性，当该离合套管相对于驱动螺管往前位移时，多个弹性扣爪能为该驱动螺管的前端的导引曲面推挤而径向收合，并且多个弹性扣爪能沿着该导引曲面朝后弹回原位而张开；
该输出钮位于该外壳的后方外侧，且该输出钮枢接该离合套管的后端的组接端部；
该计量导套穿设于该驱动螺管与该离合套管的内部，并且该计量导套能为该离合套管的多个弹性扣爪夹持；
该总量管制螺帽的外周面具有至少一凸缘，所述凸缘与该离合套管的套管导引槽部相配合。
如上所述的注射器中，所述弹性扣爪的内侧面为一扣合面，所述扣合面具有沿着前后方向延伸的多个直条纹；该计量导套的导套本体于该导套前端部与该导套螺纹部之间的外周面形成一接合面，所述接合面具有平行于该中心轴的多个直条纹，所述接合面的直条纹与所述弹性扣爪的扣合面的直条纹相匹配。
如上所述的注射器中，该外壳的周壁后段设有一刻度观视窗口，该驱动螺管的外周壁形成平行于该驱动螺旋导槽的一螺旋刻度部，该螺旋刻度部具有多个刻度线，并能通过该外壳的刻度观视窗口显示该螺旋刻度部的刻度线。
本发明可达成的有益功效是，该注射器于使用时，该注射机构除能于其前端连接药剂瓶，并通过该注射器的整体组成构造，使该注射机构能被手动触发而执行该注射模式与该备用模式的变换，其中，于注射机构的该斜张钮被触发而朝后移动时，即能带动多个逆止棘轮弹扣啮合该外壳的单向棘轮部而呈注射模式，使其具备多次药剂液定量输出功能，待注射机构前端组设的药剂瓶内所有药剂液用完，药剂瓶取下，该注射机构能手动触发该斜张钮朝前移动，使所述逆止棘轮弹扣脱离该外壳的单向棘轮部而呈该备用模式，进而使计量螺杆能直接手动朝后推回原位，同时驱动计量导套逆向旋转，并将总量管制螺帽朝后推回至计量导套的起始满量位置，使该注射器能重复再使用。
本发明注射器还能进一步使用卡匣套对注射机构执行注射模式与备用模式的变换作为触发元件，该卡匣套兼具装设药剂瓶及组设针头部件的功能，并该卡匣套装设于注射机构的外壳前端时，即能自动推动该斜张钮朝后移动而带动该多个逆止棘轮弹扣啮合该外壳的单向棘轮部呈注射模式，且在该卡匣套自注射机构的外壳前端拆下时，该斜张钮能朝前移动，使所述逆止棘轮弹扣脱离该外壳的单向棘轮部而呈备用模式。
本发明注射器还能进一步使该外壳前端内部设有导环，该导环与该活动空间的周壁 之间具有间距，且该导环于其内环壁设有至少一导引凸块；该计量螺杆的螺杆本体具有通过该螺杆螺纹部且平行该中心轴的一轴向导槽，所述轴向导槽与该外壳的导环内的导引凸块配合，借此，于当药剂瓶内所有药剂液用完时，使用者将卡匣套及其内的药剂瓶自外壳前端拆下，计量导套的逆止棘轮弹扣脱离外壳的单向棘轮部而解除其逆止功能时，计量螺杆的轴向导槽能位于对准外壳的导环内的导引凸块的位置，使原伸出外壳的计量螺杆能直接沿着中心轴的方向朝后快速推回原位，并驱动计量导套逆向旋转，以及将总量管制螺帽沿着中心轴的方向朝后推回至计量导套的起始满量位置，增进其使用的简便性。
本发明注射器还能进一步使该螺旋推送组件包括一驱动螺管、一离合套管及一输出钮；其中，该驱动螺管能螺旋运动地螺设于该外壳内，该驱动螺管于其螺管通道的前区段形成导引曲面，该离合套管能螺旋运动地穿设于该驱动螺管的螺管通道中，该离合套管后端伸出外壳后端外侧且组接输出钮，该离合套管于其套管本体前端设有多个弹性扣爪，多个弹性扣爪具有径向张开与内缩的弹性，当该离合套管相对于驱动螺管往前位移时，多个弹性扣爪能为该驱动螺管前端的导引曲面推挤而径向收合夹持该计量导套，使计量导套、离合套管与驱动螺管能一同旋转，且多个弹性扣能沿着该导引曲面朝后弹回原位而张开释放计量导套，借此，使计量导套与该螺旋推送组件之间的离合具备良好的动作顺畅性且精确性。
本发明注射器还能进一步于该外壳的周壁设置一刻度观视窗口，该驱动螺管的外周壁形成平行于该驱动螺旋导槽的一螺旋刻度部，该螺旋刻度部具有多个刻度线，并能通过该外壳的刻度观视窗口显示该螺旋刻度部的刻度线，使驱动螺管能以单一部件兼具驱动及剂量刻度表示功能。
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是本发明注射器使用卡匣套作为触发元件的一较佳实施例与药剂瓶、针头部件等的分解示意图。
图2是图1所示注射器优选实施例的卡匣套组装药剂瓶后，未组装注射机构的侧视剖面示意图。
图3是图1及图2所示注射机构的立体分解示意图。
图4是图1及图2所示注射机构的另一观视角度的立体分解示意图。
图5是图3及图4所示注射机构中的外壳主视平面示意图。
图6是图3及图4所示注射机构中的主视平面示意图。
图7是图6所示割面线A-A位置的剖面示意图。
图8是图6所示割面线B-B位置的剖面示意图。
图9是图3及图4所示注射机构移除外壳后的立体示意图。
图10是图3及图4所示注射机构移除外壳后的另一观视角度立体示意图。
图11是图3及图4所示注射机构中的离合套管与计量套管的组合型态局部立体示意图。
图12是图3及图4所示注射机构中的外壳与计量套管的组合型态主视剖面示意图。
图13是图1所示注射器优选实施例的卡匣套组装药剂瓶后，未组装注射机构的实施状态参考图。
图14是图13所示注射器优选实施例中，装有药剂瓶与注射部件的卡匣套组设于注射机构前端的实施状态参考图。
图15是图14所示注射机构中的螺旋推送组件自外壳后端朝后拉出的实施状态参考图。
图16是图15所示注射机构中的螺旋推送组件被朝前按压执行药剂液输出注射动作的实施状态参考图。
图17是图16所示注射机构完成一次执行药剂液输出注射动作的实施状态参考图。
图18是图17所示注射机构中的螺旋推送组件再次自外壳后端朝后拉出的实施状态参考图。
图19是本发明注射器于药剂瓶中的全部药剂液注射完后的平面示意图。
图20是图19所示注射器将空瓶状态的药剂瓶及其外侧的卡匣套自注射机构前端拆下的实施状态参考图。
图21是图20所示注射机构中的计量螺杆推回，使注射机构回复起始状态的平面示意图。
附图标号简单说明：
A、中心轴；1、卡匣套；10、匣套本体；100、容置空间；11、针头结合部；12、连接部；13、限位凸缘；14、观视窗；15、卡接凸粒；2、注射机构；20、外壳；200、活动空间；21、匣套结合部；211、L形卡接槽；22、导环；221、导引凸块；23、单向棘轮部；24、支臂；25、螺旋导条；26、刻度观视窗口；2A、螺旋推送组件；30、驱动 螺管；31、螺管通道；32、导引曲面；33、驱动螺旋导槽；34、螺管后端部；35、螺旋刻度部；40、离合套管；41、套管本体；42、弹性扣爪；421、扣合面；43、组接端部；44、套管通道；45、套管导引槽部；50、输出钮；60、计量导套；61、导套本体；62、逆止棘轮弹扣；621、翼片；63、导套中孔；64、导套前端部；65、螺旋部；66、导套螺纹部；67、接合面；70、总量管制螺帽；71、凸缘；80、斜张钮；81、内孔；82、圆锥曲面；90、计量螺杆；91、螺杆本体；92、螺杆前端部；93、螺杆螺纹部；94、轴向导槽；3、药剂瓶；3A、针头部件；3B、针头护套；3C、活塞；4、护盖。
具体实施方式
以下配合附图及本发明的优选实施例，进一步阐述本发明为达成预定发明目的所采取的技术手段。
请配合参看图1及图2所示，依据前揭发明内容的记载，本发明注射器能组设一内装有药剂液的药剂瓶3与连接于该药剂瓶3前端的一针头部件3A，提供一种用于执行药剂液注射功能的器具。所述药剂瓶3及所述针头部件3A均为已知物件，所述药剂瓶3内部除了装有药剂液，还装有推挤药剂液输出的活塞3C。
如图1及图2所示，本发明该注射器主要包括一注射机构2，该注射机构2具备一注射模式与一备用模式，该注射机构2能由使用者直接手动触发或通过一触发元件间接手动触发而执行所述注射模式与所述备用模式的变换。
于图1及图2所示的较佳实施例中，该注射器使用一卡匣套1作为注射机构2变换模式的触发元件，通过该卡匣套1结合注射机构2的前端而触发注射机构2自备用模式变换至注射模式，当卡匣套1自注射机构2的前端拆下时，注射机构2能自动变换为备用模式。但本发明注射器中，用于触发注射机构2变换模式的触发元件不以前述卡匣套1为限。
为便于本发明注射器的具体结构说明，以下是以图1及图2的较佳实施例为例提出说明。本发明注射器定义有前后轴向延伸的一中心轴A，该注射机构2包括一外壳20、一螺旋推送组件2A、一计量导套60、一总量管制螺帽70、一斜张钮80以及一计量螺杆90。以下分别就前述每一部件说明其构造。
如图1至图5以及图6至图8所示，该外壳20中具有沿着该中心轴A方向贯通的一活动空间200，该外壳20的活动空间200中形成一单向棘轮部23，该单向棘轮部23具有多个单斜向棘齿，且该多个单斜向棘齿相对于该中心轴A的预定顺向旋转方向呈旋 转对称排列，该外壳20的前端能拆组地连接所述药剂瓶3。
如图1至图5以及图6至图8所示，该外壳20的活动空间200内部相对单向棘轮部23的前方还设有一导环22，该导环22与该活动空间200的周壁之间具有间距。于本较佳实施例中，该导环22的外周面通过多个支臂24连接活动空间200的周壁，使导环22与活动空间200的周壁之间维持预定的间距，该导环22的内环壁设有至少一导引凸块221。于本较佳实施例中，该导环22的内环壁中设有相对于该中心轴A呈径向对称的两导引凸块221。该外壳20于活动空间200的后段周壁设有一条或多条螺旋导条25。
如图2至图4以及图6至图10所示，该螺旋推送组件2A能沿着该中心轴A方向螺旋运动地装设于该外壳20的活动空间200中，该螺旋推送组件2A伸出该外壳20的后端外侧，并能被按压而产生螺旋推进力量。于本较佳实施例中，该螺旋推送组件2A包括一驱动螺管30、一离合套管40及一输出钮50。
如图2至图4以及图6至图10所示，该驱动螺管30能螺旋运动地装设于该外壳20的活动空间中，该驱动螺管30内具有沿着该中心轴A方向贯通的一螺管通道31，螺管通道31的前端区段形成由后朝前偏向该中心轴A倾斜的一导引曲面32，即螺管通道31位于驱动螺管30的前端区段形成由后往前口径递减的曲面型态。该驱动螺管30的外周壁形成一驱动螺旋导槽33，该驱动螺旋导槽33的螺距依据注射器预定注射药剂液的剂量大小而设定，且该驱动螺旋导槽33与该外壳20内的螺旋导条25螺合，该驱动螺管30的后端具有较大外径的一螺管后端部34，该螺管后端部34伸出该外壳20的后端外侧，且螺管后端部34能受到外壳20后端的限位而限制其移动行程。
如图3及图4所示，该外壳20的周壁设置一刻度观视窗口26，该驱动螺管30的外周壁形成平行于该驱动螺旋导槽33的一螺旋刻度部35，该螺旋刻度部35具有多个刻度线(图未示)，并能通过该外壳20的刻度观视窗口26显示该螺旋刻度部35的刻度线，并使驱动螺管30兼具驱动及剂量刻度显示功能。
如图2至图4以及图6至图8所示，该离合套管40穿设于该驱动螺管30的螺管通道31中且能相对于该驱动螺管30直线运动。该离合套管40包括一套管本体41、设于该套管本体41前端的多个弹性扣爪42，以及位于该套管本体41后端的一组接端部43，该套管本体41中形成沿着该中心轴A方向由前往后延伸的一套管通道44，该套管通道44的周壁具有平行于该中心轴的至少一套管导引槽部45，该多个弹性扣爪42具有径向张开与内缩的弹性，当离合套管40相对于驱动螺管30往前位移时，该多个弹性扣爪42能为驱动螺管30前端的导引曲面32推挤而径向收合，并能沿着导引曲面32朝后弹回 原位而张开。于本较佳实施例中，所述弹性扣爪42的内侧面为一扣合面421，所述扣合面421具有沿着前后方向延伸的多个直条纹。
该输出钮50位于该外壳20的后端外侧，且该输出钮50枢接该离合套管40后端的组接端部43，该输出钮50用于提供使用者操作的部件。
如图2至图4以及图6至图11所示，该计量导套60能定点旋转地枢设于外壳20中，且穿设于该驱动螺管30与该离合套管40的内部，并能为离合套管40的多个弹性扣爪42选择性夹持，当驱动螺管30的导引曲面32带动离合套管40的弹性扣爪42收合夹持计量导套60的状态下，计量导套60与离合套管40、驱动螺管30三者能一同旋转，该计量导套60包括一导套本体61以及多个逆止棘轮弹扣62，该导套本体61中具有沿着该中心轴A方向贯通的一导套中孔63，该导套本体61前端具有一导套前端部64，导套前端部64枢接于外壳20的导环22中，导套中孔63位于该导套前端部64的区段的内周壁具有至少一螺旋部65，该导套本体61的后段外周面形成一导套螺纹部66，所述导套螺纹部66的螺距小于该驱动螺管30的驱动螺旋导槽33的螺距。该导套本体61于导套前端部64与导套螺纹部66之间的外周面形成一接合面67，所述接合面67具有平行于中心轴A的多个直条纹，所述接合面67的直条纹与所述弹性扣爪42的扣合面421的直条纹相匹配，该多个逆止棘轮弹扣62成形于该导套前端部64外侧面，该多个逆止棘轮弹扣62均呈弯曲状且相对于该中心轴A的预定顺向旋转方向呈旋转对称排列，且该多个逆止棘轮弹扣62能受控与该外壳20的单向棘轮部23离合。当所述逆止棘轮弹扣62啮合外壳20的单向棘轮部23时，该计量导套60仅能被驱动顺向旋转而不能逆向旋转，即呈所述注射模式，当所述逆止棘轮弹扣62脱离外壳20的单向棘轮部23时，即解除逆止功能，则该计量导套60能自由地顺向或逆向旋转，即呈所述备用模式。于本较佳实施例中，所述逆止棘轮弹扣62前端面具有朝前凸伸的一翼片621。
如图2至图4以及图6至图8所示，该总量管制螺帽70能沿中心轴A方向直线运动地装设于该驱动螺管30的螺管通道31内，且该总量管制螺帽70螺接于该计量导套60，该总量管制螺帽70于该计量导套60的导套螺纹部66上所能移动的距离总长对应于所述药剂瓶3内的活塞3C所能移动距离，用以管制药剂瓶3所能输出的药剂液总量。于本较佳实施例中，该总量管制螺帽70中具有内螺孔，且螺设于计量导套60的导套本体61后段的导套螺纹部66，该总量管制螺帽70外周面具有凸缘71，所述凸缘71与该离合套管40的套管通道44内的套管导引槽部45相配合。
如图2至图4以及图6至图10所示，该斜张钮80能沿着该中心轴A方向移动地装 设于该外壳20的前端内，该斜张钮80能被带动而改变所述逆止棘轮弹扣62相对于该外壳20的单向棘轮部23的离合状态而变换该注射模式与该备用模式。
于本较佳实施例中，该斜张钮80装设于该外壳20前端的匣套结合部21内，且该斜张钮80通过该外壳20前端的活动空间200的周壁与该导环22外周缘之间的空间，该斜张钮80中具有沿中心轴A贯穿的一内孔81，且斜张钮80具有由后往前尺寸递增的一圆锥曲面82，所述圆锥曲面82后段接触逆止棘轮弹扣62的翼片621，当斜张钮80受力朝后位移时，该斜张钮80能借其圆锥曲面82的径向斜张的推力驱动计量导套60的逆止棘轮弹扣62径向扩张，而使逆止棘轮弹扣62与外壳20的单向棘轮部23相啮合。当斜张钮80未受力时，能使逆止棘轮弹扣62借其本身的弹性收合而脱离该外壳20的单向棘轮部23，并能推抵该斜张钮80的圆锥曲面82而使斜张钮80朝前位移复位。
如图2至图4以及图6至图10所示，该计量螺杆90穿设于该斜张钮80与该外壳20的导环22，且该计量螺杆90螺设于该计量导套60内，并能被驱动沿着该中心轴A方向直线移动，该计量螺杆90包括一螺杆本体91以及设于该螺杆本体91前端的一螺杆前端部92，螺杆本体91外周面具有一螺杆螺纹部93，并具有通过螺杆螺纹部93且平行中心轴A的至少一轴向导槽94，螺杆螺纹部93与计量导套60的导套前端部64内的螺旋部65螺接配合，所述轴向导槽94与该外壳20的导环22内的导引凸块221配合，该螺杆前端部92位于外壳20的导环22前方与斜张钮80的前方，使计量导套60的螺旋运动能驱动计量螺杆90于外壳20中沿着中心轴A方向直线移动，用以推抵药剂瓶3内的活塞3C执行所述药剂瓶3的药剂液定量输出，当该注射机构2处于备用模式时，伸出该外壳20前端外的该计量螺杆90能沿着该中心轴A方向朝后直线运动地收合至该外壳20内。
当本发明注射器使用卡匣套1作为注射机构2变换模式的触发元件时，如图1至图2所示，该卡匣套1能容置该药剂瓶3及装设连接该药剂瓶3的该针头部件3A，并能拆组地连接该注射机构2。于本较佳实施例中，该卡匣套1中具有沿着该中心轴A方向贯通的一容置空间100，且该卡匣套1包括一匣套本体10，该匣套本体10的前端具有一针头结合部11，且该匣套本体10的后端具有一连接部12，该容置空间100于该卡匣套1的前端及后端均形成开口，药剂瓶3能拆组地装设于该卡匣套1的容置空间中定位，针头部件3A能拆组地套设于该针头结合部11，该匣套本体10后端的连接部12则能拆组地连接该注射机构2。
如图1至图5以及图6至图8所示，于本较佳实施例中，该针头结合部11外周面 设有螺纹，该针头部件3A螺接组设于该针头结合部11，该匣套本体10的周壁于连接部12的前端具有一限位凸缘13。该匣套本体10的周壁还可设置连通容置空间100的一个或多个观视窗14，提供使用者观视位于卡匣套1内的药剂瓶3的药剂液容量。
如图1至图5以及图6至图8所示，该外壳20的前端具有一匣套结合部21，该卡匣套1后端的连接部12可拆组地连接该外壳20的匣套结合部21，该外壳20前端的匣套结合部21与该卡匣套1后端的连接部12之间的组合构造可为卡接或螺接等组合构造，于本较佳实施例中，揭示该外壳20前端的匣套结合部21与卡匣套1后端的连接部12之间的组合构造为卡接组合构造，其中，于该卡匣套1后端的连接部12的外周面形成多个卡接凸粒15，于该外壳20前端的匣套结合部21的内周壁形成多个L形卡接槽211，所述L形卡接槽211包括平行于中心轴A的直槽段与连接于直槽段后端的横向段，使卡匣套1后端的连接部12置入外壳20前端的匣套结合部21内部时，卡接凸粒15沿着L形卡接槽211的直槽段移动后，再旋转卡匣套1一角度，卡接凸粒15即卡接定位于L形卡接槽211的横向段末端，使卡匣套1固定于外壳20的前端。
如图1所示，该注射器还可进一步包括一护盖4，该护盖4能套设于装有药剂瓶3与针头部件3A的卡匣套1外侧，用以防护装有针头部件的药剂瓶3，此外，该针头部件3A也可以套设一针头护套3B，用以避免针头外露，确保使用安全性。
关于本发明注射器的使用情形，以图1及图2所示的注射器较佳实施例为例，请配合参看图13、图14结合图6至图8、图12所示，将具有满量药剂液的药剂瓶3装设于卡匣套1后，以卡匣套1后端的连接部12置入注射机构2的外壳20前端的匣套结合部21中组合，并通过卡匣套1的限位凸缘13抵靠在外壳20的前端限位，同时利用卡匣套1的后端推压斜张钮80朝后移动，进而利用斜张钮80的圆锥曲面82推抵计量导套60的逆止棘轮弹扣62径向扩张，并与外壳20的单向棘轮部23相啮合而呈注射模式，并开启注射器的计量设定模式。
如图15、图16结合图6至图8所示，当卡匣套1前端装上针头部件3A，即能执行人体的药剂注射，其中，由使用者按压螺旋推送组件2A后端的输出钮50，同时通过输出钮50推抵离合套管40往前行进，当离合套管40前端的弹性扣爪42受驱动螺管30前端的导引曲面32的推挤作用下，弹性扣爪42收合并夹持计量导套60，使驱动螺管30、离合套管40与计量导套60三者同动顺向旋转，其中，通过螺旋推送组件2A的驱动螺管30外周面的驱动螺旋导槽33与外壳20内周壁的螺旋导条25的螺合构造，驱动螺管30于外壳20内部朝前螺旋行进时，且驱动螺管30的旋转圈数等于离合套管40驱 动总量管制螺帽70于计量导套60上旋转的圈数，计量导套60因斜张钮80推压限位，而使计量导套60扩张的逆止棘轮弹扣62与外壳20的单向棘轮部23相啮合，计量导套60仅能于外壳20内定点旋转，并在驱动计量螺杆90朝前直线移动，进而推顶药剂瓶3内活塞而执行定量药剂液输出。
如图17、图18结合图6至图8所示，当使用者完成一次定量药剂输出注射动作后，释放螺旋推送组件2A后端的输出钮50，离合套管40前端的弹性扣爪42受驱动螺管30前端的导引曲面32的导引作用，离合套管40能朝后弹回，并使弹性扣爪42张开而释放计量导套60，如此，螺旋推送组件2A即能朝后拉动，执行下一次定量药剂液输出的注射动作。
如图19至图21结合图6至图8所示，当使用多次后，药剂瓶3内所有药剂液用完，使用者将卡匣套1及其内的药剂瓶3自外壳20前端拆下，此时，原卡匣套1作用于斜张钮80上的力量已去除，斜张钮80即在计量导套60的逆止棘轮弹扣62内缩的回复弹力作用下，斜张钮80被朝前推回原位，而计量导套60因逆止棘轮弹扣62脱离外壳20的单向棘轮部23而解除其逆止功能，并变换为备用模式，此时，计量螺杆90的轴向导槽94位于对准外壳20的导环22内的导引凸块221的位置，原伸出外壳20的计量螺杆90即直接沿着中心轴的方向朝后推回原位，同时通过计量导套60逆向旋转，并将总量管制螺帽70沿着中心轴A方向朝后推回至计量导套60的起始满量位置。如此，使该注射器能重复再使用。
以上所述仅是本发明的优选实施例而已，并非对本发明做任何形式上的限制，虽然本发明已以优选实施例揭露如上，然而并非用以限定本发明，任何熟悉本领域的普通技术人员，在不脱离本发明技术方案的保护范围内，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保护范围内。

Claims (10)

  1. 一种注射器，其能拆组地组接具有药剂液的一药剂瓶与连接于所述药剂瓶的前端的一针头部件，其特征在于：所述注射器定义有前后轴向延伸的一中心轴且所述注射器包括一注射机构，所述注射机构具备一注射模式与一备用模式，并且所述注射机构能被手动触发而执行所述注射模式与所述备用模式的变换，所述注射机构包括：
    一外壳，其具有沿着所述中心轴的方向贯通的一活动空间，所述外壳的前端能拆组地连接所述药剂瓶，所述外壳的活动空间的前段周壁形成一单向棘轮部；
    一螺旋推送组件，其能沿着所述中心轴的方向螺旋运动地装设于所述外壳的活动空间中，所述螺旋推送组件伸出所述外壳的后端外侧，并且所述螺旋推送组件能被按压而产生螺旋推进力量；
    一计量导套，其能定点旋转地装设于所述外壳中，且所述计量导套穿设于所述螺旋推送组件中，并且所述计量导套能受控结合所述螺旋推送组件一同旋转，所述计量导套包括一导套本体以及多个逆止棘轮弹扣，所述导套本体中具有一导套中孔以及位于所述导套中孔的内周壁的至少一螺旋部，所述导套本体的后段外周面形成一导套螺纹部，所述导套本体的前端具有一导套前端部，多个所述逆止棘轮弹扣成形于所述导套前端部的外侧面，当多个所述逆止棘轮弹扣受控啮合所述外壳的单向棘轮部时，所述计量导套仅能被驱动顺向旋转而呈所述注射模式，当所述逆止棘轮弹扣脱离所述外壳的单向棘轮部时，所述计量导套能顺向与逆向旋转而呈所述备用模式；
    一总量管制螺帽，其能沿着所述中心轴的方向直线运动地装设于所述螺旋推送组件内，且所述总量管制螺帽螺接于所述计量导套后段的导套螺纹部；
    一斜张钮，其能沿着所述中心轴的方向移动地装设于所述外壳的前端内，所述斜张钮能被带动而改变所述逆止棘轮弹扣相对于所述外壳的单向棘轮部的离合状态而变换所述注射模式与所述备用模式；以及
    一计量螺杆，其穿设于所述斜张钮与所述外壳内，且所述计量螺杆螺设于所述计量导套内，所述计量螺杆包括具有螺杆螺纹部的一螺杆本体，并且所述螺杆本体以所述螺杆螺纹部与所述计量导套内的螺旋部螺接配合，所述螺杆本体的前端伸出所述斜张钮的前方，所述计量导套的螺旋运动能驱动所述计量螺杆于所述外壳中沿着所述中心轴的方向直线移动，用以执行所述药剂瓶的药剂液定量输出，当所述注射机构处于备用模式时，所述计量螺杆能沿着所述中心轴朝后直线运动地收合至所述外壳内。
  2. 根据权利要求1所述的注射器，其特征在于，所述注射器包括一卡匣套，所述卡匣套中具有沿所述中心轴的方向贯通的一容置空间，所述卡匣套能拆组地组设所述药剂瓶，且所述卡匣套的前端能拆组地组接所述针头部件，所述卡匣套能组设于所述注射机构的外壳的前端，且所述卡匣套能触发所述斜张钮朝后移动并带动多个所述逆止棘轮弹扣啮合所述外壳的单向棘轮部呈所述注射模式，且在所述卡匣套自注射机构的外壳的前端拆下时，所述斜张钮能朝前移动，使所述逆止棘轮弹扣脱离所述外壳的单向棘轮部而呈所述备用模式。
  3. 根据权利要求2所述的注射器，其特征在于，所述卡匣套包括一匣套本体，所述匣套本体的周壁设有至少一观视窗，所述匣套本体的后端具有一连接部，所述匣套本体的周壁于所述连接部的前端具有一限位凸缘，所述连接部的外周面形成多个卡接凸粒，所述外壳的前端为一匣套结合部，所述匣套结合部的内周壁形成多个L形卡接槽，所述L形卡接槽包括平行于所述中心轴的一直槽段与连接于所述直槽段的后端的一横向段，所述卡匣套的后端的连接部置入所述外壳的前端的匣套结合部内部时，所述卡接凸粒能沿着所述L形卡接槽的直槽段移动再旋入所述横向段的末端定位，使所述卡匣套组接定位于所述外壳的前端。
  4. 根据权利要求1所述的注射器，其特征在于，所述外壳的前端内部设有一导环，所述导环的外周面以多个支臂连接所述活动空间的周壁，所述导环与所述活动空间的周壁之间具有间距，所述导环的内环壁设有至少一导引凸块；所述计量螺杆的螺杆本体具有至少一通过所述螺杆螺纹部且平行所述中心轴的轴向导槽，所述轴向导槽与所述外壳的导环内的导引凸块配合。
  5. 根据权利要求4所述的注射器，其特征在于，所述逆止棘轮弹扣的前端面具有朝前凸伸的一翼片，所述斜张钮的圆锥曲面接触逆止棘轮弹扣的翼片，使所述斜张钮的圆锥曲面能通过所述翼片推动所述逆止棘轮弹扣啮合所述外壳的单向棘轮部。
  6. 根据权利要求5所述的注射器，其特征在于，所述注射器包括一卡匣套，所述卡匣套中具有沿所述中心轴的方向贯通的一容置空间，所述卡匣套能拆组地组设所述药剂瓶，且所述卡匣套的前端能拆组地组接所述针头部件，所述卡匣套能组设于所述注射机构的外壳前端，且所述卡匣套能触发所述斜张钮朝后移动而带动多个所述逆止棘轮弹扣啮合所述外壳的单向棘轮部呈所述注射模式，当所述卡匣套自注射机构的外壳前端拆下时，所述斜张钮能朝前移动，使所述逆止棘轮弹扣脱离所述外壳的单向棘轮部而呈所述备用模式。
  7. 根据权利要求6所述的注射器，其特征在于，所述卡匣套包括一匣套本体，所述匣套本体的周壁设有至少一观视窗，所述匣套本体的后端具有一连接部，所述匣套本体的周壁于所述连接部的前端具有一限位凸缘，所述连接部的外周面形成多个卡接凸粒，所述外壳的前端为一匣套结合部，所述匣套结合部的内周壁形成多个L形卡接槽，所述L形卡接槽包括平行于所述中心轴的一直槽段与连接于所述直槽段的后端的一横向段，所述卡匣套的后端的连接部置入所述外壳的前端的匣套结合部内部时，所述卡接凸粒能沿着所述L形卡接槽的直槽段移动再旋入所述横向段的末端定位，使所述卡匣套组接定位于所述外壳的前端。
  8. 根据权利要求1至7中任一项所述的注射器，其特征在于，所述外壳的内周壁具有至少一螺旋导条；所述螺旋推送组件包括一驱动螺管、一离合套管及一输出钮；其中：
    所述驱动螺管能螺旋运动地装设于所述外壳的活动空间中，所述驱动螺管内具有沿着所述中心轴的方向贯通的一螺管通道，所述螺管通道的前端区段形成由后朝前偏向所述中心轴倾斜的一导引曲面，所述驱动螺管的外周壁形成一驱动螺旋导槽，且所述驱动螺旋导槽与所述外壳的螺旋导条螺合，所述驱动螺管的后端具有一螺管后端部，所述螺管后端部伸出所述外壳的后端外侧，且所述螺管后端部能受到所述外壳的后端的限位；
    所述离合套管穿设于所述驱动螺管的螺管通道中且所述离合套管能相对于所述驱动螺管直线运动，所述离合套管包括一套管本体、设于所述套管本体的前端的多个弹性扣爪，以及位于所述套管本体的后端的一组接端部，所述套管本体中形成沿着所述中心轴的方向延伸的一套管通道，所述套管通道的周壁具有平行于所述中心轴的至少一套管导引槽部，多个所述弹性扣爪具有能径向张开与内缩的弹性，当所述离合套管相对于驱动螺管往前位移时，多个所述弹性扣爪能为所述驱动螺管的前端的导引曲面推挤而径向收合，并且多个所述弹性扣爪能沿着所述导引曲面朝后弹回原位而张开；
    所述输出钮位于所述外壳的后方外侧，且所述输出钮枢接所述离合套管的后端的组接端部；
    所述计量导套穿设于所述驱动螺管与所述离合套管的内部，并且所述计量导套能为所述离合套管的多个弹性扣爪夹持；
    所述总量管制螺帽的外周面具有至少一凸缘，所述凸缘与所述离合套管的套管导引槽部相配合。
  9. 根据权利要求8所述的注射器，其特征在于，所述弹性扣爪的内侧面为一扣合面，所述扣合面具有沿着前后方向延伸的多个直条纹；所述计量导套的导套本体于所述导套 前端部与所述导套螺纹部之间的外周面形成一接合面，所述接合面具有平行于所述中心轴的多个直条纹，所述接合面的直条纹与所述弹性扣爪的扣合面的直条纹相匹配。
  10. 根据权利要求8所述的注射器，其特征在于，所述外壳的周壁后段设有一刻度观视窗口，所述驱动螺管的外周壁形成平行于所述驱动螺旋导槽的一螺旋刻度部，所述螺旋刻度部具有多个刻度线，并能通过所述外壳的刻度观视窗口显示所述螺旋刻度部的刻度线。
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