EP2403560A1 - Dispositif d'injection à réglage de volume d'injection - Google Patents

Dispositif d'injection à réglage de volume d'injection

Info

Publication number
EP2403560A1
EP2403560A1 EP10702245A EP10702245A EP2403560A1 EP 2403560 A1 EP2403560 A1 EP 2403560A1 EP 10702245 A EP10702245 A EP 10702245A EP 10702245 A EP10702245 A EP 10702245A EP 2403560 A1 EP2403560 A1 EP 2403560A1
Authority
EP
European Patent Office
Prior art keywords
injection
actuating
stop
injection device
application mechanism
Prior art date
Legal status (The legal status 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 status listed.)
Withdrawn
Application number
EP10702245A
Other languages
German (de)
English (en)
Inventor
Andreas Renz
Wilfried Weber
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dieter Holze Technik-Projekte GmbH
Dieter Hoelze Technik Projekte GmbH
Original Assignee
Dieter Holze Technik-Projekte GmbH
Dieter Hoelze Technik Projekte GmbH
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 Dieter Holze Technik-Projekte GmbH, Dieter Hoelze Technik Projekte GmbH filed Critical Dieter Holze Technik-Projekte GmbH
Publication of EP2403560A1 publication Critical patent/EP2403560A1/fr
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M5/2033—Spring-loaded one-shot injectors with or without automatic needle insertion
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/2006—Having specific accessories
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/206—With automatic needle insertion
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A61M2005/2403—Ampoule inserted into the ampoule holder
    • A61M2005/2414—Ampoule inserted into the ampoule holder from the side
    • 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
    • A61M5/31546—Electrically operated dose setting, e.g. input via touch screen or plus/minus buttons
    • 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
    • A61M5/3155—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe
    • A61M5/31553—Mechanically operated dose setting member by rotational movement of dose setting member, e.g. during setting or filling of a syringe without axial movement of 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
    • A61M5/31563—Mechanically operated dose setting member interacting with a displaceable stop 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
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31566—Means improving security or handling thereof
    • A61M5/31573—Accuracy improving means
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/3159—Dose expelling manners
    • A61M5/31591—Single dose, i.e. individually set dose administered only once from the same medicament reservoir, e.g. including single stroke limiting means
    • 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
    • A61M5/46—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests having means for controlling depth of insertion

Definitions

  • the invention relates to an injection device for automatic extrusion of an injection device according to the preamble of claim 1.
  • the injection device has for this purpose a housing in which an especially accessible transversely to an injection direction receiving space for an injection device to be used is provided, which can be expressed via an injection ram injectable Onswashkeits constituer has.
  • the injection device has an actuating device for automatic extrusion of the injection liquid container, which can be displaced between an insertion / removal position outside and an injection position within the receiving space.
  • the actuating device is spaced in the insertion / removal position by a clearance distance from the receiving space, which allows easier insertion or removal of the injection device.
  • an injection device for receiving and actuating a two-chamber ampoule is known. This has a plunger for actuating the ampoule, which is held in its initial position spaced from an ampoule flask to allow easy insertion and removal of the two-chamber ampoule. After its activation, the injection device performs a mixing stroke in which the plunger is automatically applied to the ampoule flask and displaces it.
  • the object of the invention is therefore to enable a precise injection volume adjustment and a comfortable handling in a generic injection device.
  • an injection device having the features of claim 1.
  • a landing mechanism is provided, by means of which the actuating device can be brought into a stop position.
  • an actuating stop of the actuating device is free of play on the injection ram of the injection device received therein.
  • an injection volume setting is automatically actuated or activated precisely in this stop position.
  • the injection volume setting is formed by a mechanically or electrically or electronically controlled device which is suitable for the predetermined definition of a fixed or adjustable injection volume of the medium to be injected.
  • the injection volume setting starting from the stop position along an injection direction, limits a stroke of the actuating supply device. In this way, a simple but accurate determination of the stroke and thus of the injection volume to be administered is possible.
  • the actuating stop on the other actuator is movably held and the application mechanism has fixing means by means of which the actuating stop in dependence on the position of the injection ram to the rest of the actuator can be fixed. In this way, regardless of possible manufacturing tolerances of the injection device, a play-free stop position of the actuating device can be ensured.
  • the injection volume setting is actuated by the application mechanism, whereby this also serves to activate the injection volume adjustment in addition to the displacement of the actuating stop and the locking of the same on the actuating device.
  • the simultaneous activation of the injection volume setting when reaching the stop position can be achieved particularly easily.
  • the actuating stop is formed by an actuating tappet displaceable on the actuating device in the direction of injection, and the locking means generate a positive locking against the direction of injection upon contact of the actuating stop on the injection tappet, whereby a positionally stable fixing of the actuating stop to the remaining actuating device during a force application of the injection shock can be ensured.
  • the application mechanism can be activated or deactivated depending on the position of a cover of the housing. In this way it can be ensured that the actuating device is not accidentally activated when the lid is open.
  • the application mechanism in this case has a displaceable by the cover actuator, which is a blocking position with the lid open occupies, in which it holds the fixing means and the actuating plunger against a respective bias in the insertion / removal position.
  • the actuating plunger is arranged in the insertion / removal position in a rear stop position and the Verrieglungsstoff are solved. This ensures that the clearance distance is completely available to allow a comfortable insertion or removal of the injection device.
  • the application mechanism has a clamping element displaceable transversely to the direction of injection. This is displaced by the actuating plunger when it rests against the injection ram via a bevel in an end position in which it blocks a movement of the actuating plunger against the injection direction relative to the other actuator.
  • the actuating tappet is fixed to a movable stop element of the injection volume setting. In this way, the actuator is mechanically coupled in the application position with the injection volume setting to limit your stroke in a simple way.
  • the movable stop element has a toothing, with a counter toothing of the coupling element is engageable to achieve a stable positive connection between the actuator and the movable stop member.
  • the injection volume setting has an adjustable end stop which is arranged in the direction of movement of the movable stop element. As a result, the stroke and thus the injection volume to be administered can be adjusted or changed as needed.
  • the end stop is advantageously displaced over an accessible from outside the housing screw to provide the adjustable injection volume setting particularly cost.
  • the injection volume setting is formed by a control unit of an electric motor.
  • the control unit can be actuated via the signal of a sensor by means of which the stop position of the actuating device can be detected. In this way, starting from the stop position, a particularly accurate and variable injection volume adjustment is possible.
  • the injection volume setting has a counting function by means of which, starting from the stop position, a number of completed revolutions of the motor can be determined. In this way, a required number of revolutions can be calculated and set via the injection volume setting, by which the transport mechanism is brought into an end stop position whose distance from the stop position corresponds to the stroke that must be traversed by the injection slide with respect to the injection device used to first the Einstechhub and then squeeze the volume of the drug to be injected adjusted at the injection volume setting.
  • FIG. 1 shows a longitudinal section of an injection device according to the invention
  • FIG. 2a shows a simplified sectional illustration of the injection device according to FIG. 1 in a starting position in which an actuating device is in an insertion / removal position
  • FIG. 2b shows a representation of the injection device when a start button is actuated
  • FIG. 2c shows a representation of the injection device when a predetermined piercing depth has been reached
  • FIG. 2d a representation of the actuating device in a stop position
  • FIG. 2e a representation of the actuating device in an injection position
  • FIG. 2f a representation of the injection device at the beginning of a return stroke
  • FIG. 3 shows a perspective view of the injection device with an alternative embodiment of a landing mechanism
  • FIG. 4 shows a longitudinal section through the injection device according to FIG. 3 in FIG.
  • FIG. 5a shows a section through the application mechanism in plane V-V of Fig. 4,
  • Figure 5c is a section through the application mechanism with fully closed lid
  • Figure 5d is a sectional view of the injection device in the direction Vd of Figure 5c.
  • FIG. 1 shows an injection device 2 according to the invention with a housing 4.
  • the housing 4 forms a receiving space 6 for a syringe-shaped injection device 8, which has a Injetations butterkeits actuallyer 10.
  • the injection liquid container 10 serves to receive a medicament M to be injected and can be pressed out via an injection ram 12.
  • the receiving space 6 has a virtual longitudinal extent I which corresponds to at least one total length of the injection device 2 provided for use on the injection device 2 at a planned maximum volume of the medicament M received.
  • the housing 4 has a removable cover 14 which permits lateral access to the receiving space 6 with respect to an injection direction R and thus lateral insertion of the injection device.
  • the injection device is fixed to a plunge carriage 16 of an actuating device 18.
  • This also has an injection slide 20, which serves to act on the injection ram 12 and which can be moved relative to the Einstechschlitten 16 for this purpose.
  • a generally designated 22 application mechanism On the injection carriage 20, a generally designated 22 application mechanism is provided. This has an actuation slide 20 movably mounted on the actuating slide 24, which forms an actuating stop 26 at its end in the direction of injection R end. This actuating stop 26 serves to rest on the injection tappet 12.
  • an injection volume setting 28 is provided between the injection slide 20 and the housing 4.
  • This has an end stop 30 which is displaceable parallel to the direction of injection R via an adjustable screw 32 accessible from outside the housing 4.
  • a stroke wH of a movable stopper 34 is limited, which is formed on a stop member 36.
  • This is mounted movably parallel to the direction of injection R on the housing 4 and has a toothing 38 on a side facing the injection slide 20.
  • the stop element 36 can be coupled via a coupling element 40 to the injection slide 20, which for this purpose has a counter toothing 42 which can be brought into engagement with the toothing 38.
  • the coupling element 40 is held displaceably on the injection slide 20 transversely to the direction of injection R and abuts with an oblique end surface 44 on an inclined control surface 46 of the actuating tappet 24, which is formed on an end facing away from the actuating stop 26.
  • the injection device 2 for the automatic drive of the actuating device 18 has a compression spring 48 acting on the injection slide 20 in the direction of injection R.
  • an electrical transport mechanism 50 can be applied counter to the direction of injection R to the injection carriage 20, which is driven by a motor 52.
  • the transport mechanism 50 can serve on the one hand to control the speed of the actuating device 18 in the injection direction R and to return the actuating device 18 to the starting position after a completed injection process.
  • an electrical or electronic control unit 54 is provided on the motor 52, which, for example, comprises a counting element for determining a number of revolutions of the motor 52.
  • FIG. 2a to 2f illustrate the basic arrangement of the essential parts of the injection device 2 for the invention during the implementation of an injection application.
  • the actuating device 18 is held in its insertion / removal position, the Einstechschlitten 16 via a locking mechanism 56 and the injection carriage 20 by the transport mechanism 50 each in a rear end position with respect the injection direction R are held.
  • the movable stop element 36 is biased by the force of a spring FA in a rear end position in which the stopper 34 has a maximum distance to the end stop 30, which corresponds to the stroke distance wH set at the Injetechnischsvolumeneinstel- 28 or the injection volume defined thereby.
  • the Einstechhub ends, as shown in Fig. 2c, by conditioning the Einstechschlittens 16 on a housing-side Einstech brieflyenanschlag 64. At the same time the movement coupling of the carriage 16, 20 is lifted via the driver 58 by means of appropriate control means 66, so that the injection slide 20 now also with respect to the Einstechschlitten 16 can be moved in the direction of injection R further.
  • the driver 58 and the control means 66 also shown only schematically, for example, by an am Einstechschlitten 16 bearing sliding block and with this cooperating control surfaces on the injection slide 20 and the housing 4 (not shown) may be formed.
  • the actuating stop 26 Due to the relative movement of the injection slide 20 relative to the plunge carriage 16, the actuating stop 26, as shown in FIG. 2 d, is now brought into a stop position, in which it is directly adjacent to the receiving space 6 or comes into contact with the injection plunger 12. Due to the resistance of the injection tappet 12, the actuating tappet 24 on the injection slide 20 is displaced towards the rear against the direction of injection R. By this relative movement relative to the injection slide 20, the inclined control surface 46 presses against the inclined end face 44 of the coupling element 40, which is thereby displaced in the direction of the stop element 36. In this case, the toothing 38 comes into engagement with the counter teeth 42, which in turn results in a movement coupling of the stop element 36 with the injection slide 20. At the same time, the coupling element 40 blocks in this engaged position, a further displacement of the actuating plunger 24 and thus acts as a fixing means by means of which the actuating stop 26 is set positively on the injection carriage 20 with respect to the injection direction R.
  • an injection stroke is now completed, in which the actuating stop 26 is moved to an injection position within the receiving space 6 and thereby the injection plunger 12 is displaced within the injection liquid container 10.
  • the injection volume of the medicament M predetermined via the injection volume setting 28 exits via the cannula 62 until it has passed the stroke wH from the injection slide 20 in the direction of injection R with the moving stop element 36 and stops at the end stop 30, as shown in FIG. 2e.
  • the injection device 2 can then remain for a predetermined dwell time to ensure that the set Injection volume of the drug M can completely exit via the cannula 62.
  • the motor 52 can then drive the transport mechanism 50 counter to the direction of injection R to return the actuating device 18 back to the insertion / removal position and thus the injection device 2 as a whole back to the starting position to shift according to Fig. 2a.
  • FIG. 3 shows an alternative embodiment of the injection device 2, wherein here only one with respect to the embodiment of FIGS. 1 and 2 different application mechanism 70 is provided, while the remaining operation remains the same. Corresponding elements of both embodiments are therefore designated by the same reference numerals as in FIGS. 1 and 2.
  • the application mechanism 70 of the embodiment according to FIG. 3 differs from the application mechanism 22 described above essentially in that it can be actuated in dependence on the position of the cover 14 and thereby spends the actuation device into the stop position before the insertion stroke.
  • the cover 14 can, as shown, completely removable from the housing 4 and again fixed or alternatively be hinged to the same.
  • an actuating element 72 is formed on the cover 14. This is pressed when closing the lid 14 against a toggle lever 74 of a deflecting gear 76 of the application mechanism 22, which projects for example from the open housing 4 out, as shown in Fig. 4.
  • FIGS. 5 a to 5 c show the application mechanism 70 in the starting position according to FIG. 4, in which the actuation device 18 forms the release distance d between the injection ram 12 and the actuation stop 26 the insertion / removal position occupies.
  • the actuating plunger 24 is biased by a spring 78 in the direction of injection R and has a side arm 80 which projects out of a guide slot 82 of the injection slide 20 out.
  • fixing means are provided with a pivotally held latch hook 84.
  • the latching hook 84 is acted upon by a spring 86, which biases him in the direction of a locking position.
  • both the latching hook 84 and the actuating plunger 24 are held counter to their respective bias by acting as an actuator pivot arm 88 of the deflection gear 76 in a rear relative to the injection direction R stop position.
  • the latching hook is detached from the injection slide 20.
  • the deflection gear 76 is for this purpose acted upon by a biasing spring FV, which is greater than the sum of forces of the springs 78 and 86th
  • Fig. 5b shows the application mechanism 70 when closing the lid 14, as indicated in Fig. 4 by dotted lines.
  • a loose first member 90 of the toggle lever 74 is spread away from a fixed member 92 in the direction of injection R by the pressure of the actuating element 72 on the toggle 74 (as shown in FIG.
  • the first member 90 is connected to the pivot arm 88, so that this is also displaced from its blocking position shown in FIG. 5a out in the injection direction R.
  • the actuating plunger 24, which continues to rest on its side arm 80 on the pivot arm 88, moves in response to the action of the spring 78 with the pivot arm 88 and thus enters the stop position on the injection plunger 12 of FIG. 5b.
  • FIG. 5 c shows the application mechanism 70 when the cover 14 is completely closed (as shown in FIG. 5 d).
  • the first member 90 is displaced in this position against the biasing spring FV far enough in the direction of injection R, that the pivot arm 88 is laterally pivoted into a release position and thereby completely releases the movement of both the side arm 80 and the latching hook 84 , As a result, the latching hook 84 is pivoted as a result of the action of the spring 86 in a locking position in which the actuating plunger 24 is positively fixed to the injection carriage 20.
  • 5c thus represents the injection device 2 in the stop position of the actuating device 18 when the actuating stop 26 is fixed relative to the injection carriage 20, this stop position being detected by a sensor 94 provided by way of example on the actuating stop 26 and signaled to the injection volume setting 28 (see FIG. 5d).
  • a sensor could be provided which detects only the closed state of the lid 14 and the injection volume setting 28 signals (not shown).
  • the injection volume setting 28 is thereby implemented as an electronic component of the control unit 54 of the motor 52 (see FIG. 4), at which a desired injection volume of the medicament M to be injected is provided, for example via an input / display device E / A provided on the housing 4 (see Fig. 3) is adjustable.
  • the injection volume setting 28 is further connected to a position sensor 95 (see FIG. 5c) which detects the set position of the puncture depth stop 64 and forwards it to the injection volume setting 28.
  • the position sensor 95 can be formed for example by a sliding potentiometer.
  • the injection volume setting 28 determines, starting from the stop position, one through the position of Einstechtiefenanschlags 64 predetermined Einstechweg wE for performing the Einstechhubes and a dependent of the set injection volume injection path wl for carrying out the injection stroke, according to the dot-dashed representation in Fig. 5d.
  • the injection device 2 then passes through the Einstechhub after actuation of the start button 60 first.
  • the piercing slide 16 is displaced together with the injection slide 20 by the compression spring 48 via the insertion path wE and the cannula 62 exits from the housing 4, as shown by dotted lines.
  • the Einstechhub ends by conditioning the Einstechschlittens 16 at Einstechtiefenanschlag 64 (see dash-dotted line in Fig. 5c).
  • this can alternatively also be implemented mechanically.
  • a stop between the injection slide and the insertion slide could be provided (not shown), which closes off the injection stroke.

Landscapes

  • 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

La présente invention concerne un dispositif d'injection (2) comportant un boîtier (4) pourvu d'un logement (6) accueillant une seringue (8) définissant un réservoir à liquide d'injection (10) pouvant être chassé par compression au moyen d'un piston de seringue (12). Le dispositif d'injection (2) comporte également un actionneur (18), qui permet de vider automatiquement par compression le réservoir à liquide d'injection (10), et qui est mobile entre une position de mise en place et d'enlèvement, située à l'extérieur du logement (6), et une position d'injection, située à l'intérieur du logement (6). En position de mise en place et d'enlèvement, l'actionneur (18) présente par rapport au logement (6) un écart de dégagement (d). L'invention comporte en outre un mécanisme de mise en contact (22) permettant d'amener l'actionneur (18) en position de butée dans laquelle une butée d'actionnement (26) de l'actionneur (18) vient se placer contre le piston de seringue (12), le réglage du volume d'injection (28) s'effectuant automatiquement dans cette position.
EP10702245A 2009-03-03 2010-01-22 Dispositif d'injection à réglage de volume d'injection Withdrawn EP2403560A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202009003009U DE202009003009U1 (de) 2009-03-03 2009-03-03 Injektionsvorrichtung mit Injektionsvolumeneinstellung
PCT/EP2010/000373 WO2010099850A1 (fr) 2009-03-03 2010-01-22 Dispositif d'injection à réglage de volume d'injection

Publications (1)

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EP2403560A1 true EP2403560A1 (fr) 2012-01-11

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EP10702245A Withdrawn EP2403560A1 (fr) 2009-03-03 2010-01-22 Dispositif d'injection à réglage de volume d'injection

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US (1) US9233205B2 (fr)
EP (1) EP2403560A1 (fr)
JP (1) JP5650669B2 (fr)
DE (1) DE202009003009U1 (fr)
WO (1) WO2010099850A1 (fr)

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Also Published As

Publication number Publication date
US20120056019A1 (en) 2012-03-08
US9233205B2 (en) 2016-01-12
WO2010099850A1 (fr) 2010-09-10
DE202009003009U1 (de) 2009-06-25
JP2012519042A (ja) 2012-08-23
JP5650669B2 (ja) 2015-01-07

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