EP2073872A1 - Appareil d'injection à entraînement à faibles pertes - Google Patents

Appareil d'injection à entraînement à faibles pertes

Info

Publication number
EP2073872A1
EP2073872A1 EP07720136A EP07720136A EP2073872A1 EP 2073872 A1 EP2073872 A1 EP 2073872A1 EP 07720136 A EP07720136 A EP 07720136A EP 07720136 A EP07720136 A EP 07720136A EP 2073872 A1 EP2073872 A1 EP 2073872A1
Authority
EP
European Patent Office
Prior art keywords
sleeve
housing
distal
proximal
dose
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Withdrawn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
EP07720136A
Other languages
German (de)
English (en)
Inventor
Philippe Kohlbrenner
Peter Stettler
Patrick Hostettler
Jürgen Wittmann
Martin Wittwer
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.)
Tecpharma Licensing AG
Original Assignee
Tecpharma Licensing AG
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 Tecpharma Licensing AG filed Critical Tecpharma Licensing AG
Publication of EP2073872A1 publication Critical patent/EP2073872A1/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Withdrawn legal-status Critical Current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
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
    • A61M5/31585—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod performed by axially moving actuator, e.g. an injection button
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/24—Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or carpules, e.g. automatic
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31511—Piston or piston-rod constructions, e.g. connection of piston with piston-rod
    • A61M5/31513—Piston constructions to improve sealing or sliding
    • 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
    • A61M5/31561—Mechanically operated dose setting member using freely adjustable volume steps
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31565—Administration mechanisms, i.e. constructional features, modes of administering a dose
    • A61M5/31576—Constructional features or modes of drive mechanisms for piston rods
    • A61M5/31583—Constructional features or modes of drive mechanisms for piston rods based on rotational translation, i.e. movement of piston rod is caused by relative rotation between the user activated actuator and the piston rod
    • 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
    • A61M5/20—Automatic syringes, e.g. with automatically actuated piston rod, with automatic needle injection, filling automatically
    • A61M2005/2006—Having specific accessories
    • A61M2005/202—Having specific accessories cocking means, e.g. to bias the main drive spring of an injector
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61M—DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY; DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY; DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR
    • A61M5/00—Devices for bringing media into the body in a subcutaneous, intra-vascular or intramuscular way; Accessories therefor, e.g. filling or cleaning devices, arm-rests
    • A61M5/178—Syringes
    • A61M5/31—Details
    • A61M5/315—Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod or piston; Appliances on the rod for facilitating dosing ; Dosing mechanisms
    • A61M5/31533—Dosing mechanisms, i.e. setting a dose
    • A61M5/31535—Means improving security or handling thereof, e.g. blocking means, means preventing insufficient dosing, means allowing correction of overset dose
    • A61M5/31536—Blocking means to immobilize a selected dose, e.g. to administer equal doses
    • A61M2005/3154—Blocking means to immobilize a selected dose, e.g. to administer equal doses limiting maximum permissible dose
    • 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
    • A61M2202/00—Special media to be introduced, removed or treated
    • A61M2202/04—Liquids
    • 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
    • A61M2205/00—General characteristics of the apparatus
    • A61M2205/58—Means for facilitating use, e.g. by people with impaired vision
    • A61M2205/581—Means for facilitating use, e.g. by people with impaired vision by audible feedback
    • 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
    • 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
    • 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
    • A61M5/31568—Means keeping track of the total dose administered, e.g. since the cartridge was inserted

Definitions

  • the present invention relates to a device for administering a fluid product.
  • the device may be designed as an injection device for injecting an adjustable dose of the product and in particular in the form of an injection pen, i. of a compact pen-shaped injection device.
  • the prior art discloses a large number of injection devices for metered administration of medicaments, such as insulin, growth hormones or osteoporosis preparations, which have to be administered regularly.
  • medicaments such as insulin, growth hormones or osteoporosis preparations
  • Such devices should reliably and precisely dispense a presettable dose.
  • they should be highly user-friendly and user-friendly. This is even more so since they are usually operated by the patient himself.
  • the drug can be accommodated in a replaceable carpule which can be inserted into a carpule holder. This can then be attached to a housing of the injection device, for example by a screw or a bayonet connection.
  • a conveyor with a conveying element in the form of a piston rod.
  • compact pen-shaped administration devices are known in which the distribution takes place automatically after a first triggering ("power-assisted pens").
  • the dose is usually preset in such devices by a rotation on a Dosierknopf.
  • the device has a drive, eg a spring drive, which is tensioned when setting the dose.
  • the device is triggered by pressing in a triggering device, which may be identical to the dosing button.
  • the drive generates a drive movement, for example in the form of a rotational movement, which is converted into a propulsion movement of the piston rod.
  • the piston rod is usually formed as a threaded rod on which a drive nut runs.
  • injection pens examples include DE-A 10 2004 063 644, DE-A 10 2004 063 647, WO-A 2004/002556 and DE-A 102 29 122.
  • the device according to the invention for administering a fluid product thus comprises a housing and a conveying element, which is movable for conveying the product from a reservoir relative to the housing.
  • the device further comprises at least one ball bearing, which receives forces that are transmitted between the conveyor element and the housing.
  • a ball bearing is particularly advantageous if the device comprises at least one rotatable element cooperating with the conveying element and a drive device for generating a rotational movement of the rotatable element relative to the housing, wherein the rotational movement of the rotatable element along a (preferably linear) advancing movement of the originallyele- along a feed axis in a distal direction causes, preferably by a threaded engagement, which is preferably non-blocking.
  • the ball bearing is advantageously arranged such that it receives along the feed axis acting (axial) forces, which are transferred from the (preferably non-rotatable) relative to the housing conveying element via the rotatable EIe- ment on the housing, ie between the rotatable element and the housing act.
  • axial forces acting in particular in the proximal direction are transmitted between the conveying element and the housing via a rotatable connection which is displaceable in the axial direction.
  • a sliding connection between the rotatable element and the housing or a housing-fixed element is usually provided for this purpose.
  • At least one ball bearing is provided, the Preferably, between the rotatable member or an associated element on the one hand and the housing or a housing-fixed at least during the administration element on the other hand is arranged. As a result, friction losses during rotation of the rotatable element can be avoided.
  • ball bearings which are preferably arranged to provide forces along the feed axis in both the proximal direction and the opposite distal direction, i. the direction in which the feed takes place can record.
  • Axial forces in the proximal direction usually arise during administration, while axial forces in the distal direction can arise, in particular, when the delivery element is spring-loaded in the distal direction, as is the case in a preferred embodiment.
  • the spring serving for this purpose is preferably so weak that it does not cause expulsion of the product from the reservoir. Rather, it serves to automatically bring the conveying element into its distal end position during a reservoir change, ie to extend it completely when the reservoir is removed from the housing.
  • the device can be designed as follows:
  • the conveying element is sleeve-shaped with a proximal and a distal end and has an internal thread.
  • the conveyor element is rotatably guided relative to the housing along the feed direction. It is (axially) movable between a proximal and a distal end position along the feed direction.
  • the rotatable element has an external thread which cooperates with the internal thread of the conveying element. In this way, a thread on the outside of the conveying element can be avoided, and the peripheral surface of the conveying element can be smooth or any other Be fashioned. This offers on the one hand advantages in the cleaning of the conveying element, since a smooth peripheral surface is known to be easier to clean than a thread.
  • a smooth circumferential surface allows a simple seal between the conveyor element and a radially surrounding the originallyele- element to achieve a seal between the outside of the conveyor element and the interior of the housing.
  • a conveying element with internal threading allows an external design of the conveying element that is less "technical" for the patient than a threaded rod and therefore helps to increase the acceptance of the injection device The external thread then cooperates with an internal thread of the preferably designed as a drive nut rotatable element, as is known from the prior art.
  • such an internal threaded conveying element is surrounded radially at least partially by a guide sleeve having a proximal end and a distal end.
  • the length of this guide sleeve preferably corresponds at least to the maximum feed region of the delivery element, ie the distance between the distal and the proximal end position of the delivery element.
  • the guide sleeve is rotatably connected at least during administration with the housing or a housing-fixed element.
  • the conveyor element is rotatably guided along the feed direction in the guide sleeve.
  • the conveying element is at least in the region of its proximal end with the interior of the guide sleeve in a rotationally fixed engagement, but allows an axial displacement.
  • an engagement structure protruding radially outward from the outer circumferential surface of the conveying element for example in the form of a plurality of longitudinal ribs, having a complementary structure, eg in the form of a plurality of longitudinal grooves, on the inner peripheral surface of the guide sleeve interacts.
  • the device then preferably also comprises an outer sleeve a proximal and a distal end, which in turn at least partially surrounds the guide sleeve radially.
  • this outer sleeve is connected to the rotatable element. Near its distal end, the outer sleeve is guided rotatably and non-displaced relative to the guide sleeve via the at least one ball bearing.
  • the conveyor element should be secured against rotation relative to the stationary housing and longitudinally guided.
  • the conveying element should preferably be designed on its outside substantially smooth or otherwise arbitrary. This implies that the conveying element is longitudinally guided only in the region of its proximal end in a rotationally fixed to the housing element. However, this in turn requires that this non-rotatable element is at least as long that the guide is ensured over the entire range of the feed of the conveying element.
  • a sleeve-like structure of the rotationally fixed member is chosen, which is therefore referred to as a guide sleeve, with a length of this guide sleeve which corresponds at least to the feed region of the conveying element.
  • the rotatable element To drive the conveying element, the rotatable element must furthermore be arranged in the interior of the conveying element. In order to ensure a threaded engagement over the entire feed area, the rotatable element must extend at least over a length from proximal to distal in the conveying element, which corresponds to the feed area. The only available access to the rotatable element consists of the proximal end. A drive of the rotatable element must therefore take place via its proximal end. At the same time, the rotatable element must be supported in any way relative to a housing-fixed element. This bearing must be able to absorb axial forces, as axial forces are transmitted from the conveyor element via the threaded engagement with the rotatable element.
  • the conveying element with respect to the housing or a housing-fixed element is liquid-tight, at least splash-proof, sealed. This effectively prevents ingress of liquids.
  • a corresponding seal may be formed directly between the conveyor element and the housing. But it is also conceivable that a first seal between the conveying element and a member which is movable relative to the housing, is formed, and a second seal between the movable member and the housing is formed.
  • the movable element may e.g. be arranged so that it is movable only during a change of the reservoir and is immobile during the actual administration to the housing. It may in particular be sleeve-shaped.
  • the conveying element preferably has a substantially smooth, cylindrical see, preferably circular cylindrical outer wall portion which is surrounded by at least one annular sealing element.
  • the length of the smooth outer wall region corresponds at least to the distance between the distal end position and the proximal starting position, between which the conveying element is movable in the course of administration to ensure a seal over this entire area.
  • a "substantially smooth" outer wall region is to be understood as meaning an area in which there are no structures such as threads or grooves that could oppose an efficient sealing effect.
  • the outer wall region may well have fine structures, in particular in the region below 100 micrometers, preferably below 10 micrometers, which are suitable for at least not impairing or even improving the sealing effect, for example a microstructure or nanostructuring. These structures may have a preferred direction to inhibit the flow of liquids.
  • the at least one annular sealing element preferably comprises at least one circumferential, flexible sealing lip, which rests on the cylindrical outer wall region and acts as a wiper in the manner of a windshield wiper.
  • the contact angle between the sealing lip and the outer wall region is preferably less than 90 degrees. It may, however, be e.g. also be designed as a ring with a round or polygonal cross-section.
  • the interior of the housing is completely sealed liquid-tight against the outside of the housing, so not only in the area in which the conveying element is guided to the outside, but also in other areas, e.g. in the range of moving dosing or actuating elements.
  • the conveying element or a sealingly cooperating with this element may in particular consist of a hydrophobic material or hydrophobic be coated to achieve or improve a sealing effect by creep by capillary action is avoided.
  • the reservoir is preferably held in a container holder, which is releasably attachable to the housing. When mounting, it is preferably guided relative to the housing such that it performs a combined rotational movement about an axis of rotation and translational movement along the axis of rotation relative to the housing.
  • the device then preferably further comprises a spring element and a latching element. These elements are arranged such that the spring element generates a spring force acting essentially along the axis of rotation on the latching element. The latching element thereby causes in a predetermined holding position of the container holder a releasable latching connection, by which the container holder is fixed relative to the housing.
  • the latching connection is preferably designed so that it can be released again by a movement of the container holder relative to the housing, which is opposite to the movement during fastening, that is, the latching connection need not be unlocked manually.
  • connection in the manner of a screw or preferably bayonet connection between the container holder and the housing or between them connected to these elements In conventional bayonet connections between two elements, an element with a bayonet pin in a suitably shaped slot or in a corresponding groove in the manner of a gate guide of the other element is usually performed until the bayonet pin reaches an end position (corresponding to the holding position). In such compounds, there is the problem of avoiding unintentional sliding back of the pin from the end position out. A similar problem arises with screw connections which are fixed by a clamping force and can likewise be released inadvertently.
  • the present embodiment solves this problem by providing an axially spring-loaded (and axially movable) locking element provides.
  • Such a locking element ensures a defined fixation of the container holder in the holding position, without the risk of unintentional release exists.
  • the connection is only solvable by overcoming a sufficiently large force. This wear, which could lead to a leaching of the connection, avoided.
  • the latching element is spring-loaded in the axial direction, a simple and space-saving design of the locking element and the spring element is made possible.
  • the container will be a container with a cylindrical wall region and a stopper displaceable therein, a so-called carpule, which defines a longitudinal direction and is accommodated in a container holder with a correspondingly elongate shape.
  • the container holder When mounting on the housing, the container holder is preferably rotated about this longitudinal direction, that is, the axis of rotation coincides with the longitudinal axis.
  • the plug is advanced by the conveyor element along the longitudinal direction. More generally, thus preferably, the feed direction of the conveying element corresponds to a direction along the axis of rotation about which the container holder is rotated during its attachment.
  • the locking element is rotatably relative to the housing and releasably locked in the locking position with an element which is rotationally fixed relative to the container holder.
  • the locking element does not follow the rotation of the container holder, but remains in the attachment of the container holder rotationally fixed to the housing.
  • the reverse arrangement is conceivable in which the locking element is rotatably relative to the container holder.
  • the device comprises a driving element, which is arranged rotatably relative to the housing.
  • the entrainment element is guided in such a way relative to the housing, that it is in the fastening of the Container holder on the housing as well as the release of the container holder is taken from the housing through the container holder and placed in a movement that includes a rotational movement about the axis of rotation.
  • the locking element then causes in the holding position of the container holder a detachable latching connection fertilg, by which the driving element is fixed relative to the housing. This in turn holds the container holder.
  • the container holder is thus fixed indirectly, via the driving element, relative to the housing. This allows a greater freedom in the design of the container holder and the locking element and spring element.
  • the device comprises a relative to the housing rotatably arranged guide element, which may be formed in particular as a guide sleeve.
  • This guide member may be rigidly connected to the housing, in particular be made in one piece with this, or it may be axially displaceable relative to the housing.
  • the driving element which can also be configured as a sleeve and can then be referred to as a bayonet sleeve, is at least rotatably connected to the guide element.
  • the spring element and the latching element are preferably arranged rotationally fixed relative to the guide element, and the latching element is releasably latched in the holding position of the container holder with the driving element.
  • the guide element relative to the housing axially displaceable and the driving element, although rotatably, but be connected axially fixedly fixed to the guide element.
  • This design makes it possible that further arranged in the housing parts of the device, which are connected to the guide element, are axially displaced when the container holder is attached to the housing.
  • the administration device can automatically be reset, for example, when the container holder is released, and returned to an operational state when the container holder is fastened.
  • the triggering device which may be configured as a push button, is retracted into the housing and thus indicates that the device is not ready.
  • the carrier element is preferably guided relative to the housing such that it is entrained by the container holder when the container holder is fastened to the housing and offset relative to the housing in a combined rotational movement about the axis of rotation and translation along the axis of rotation in a proximal direction.
  • the driving element between two defined end positions is movable, and the locking element causes in both positions a releasable locking connection, by which the driving element is fixed relative to the housing.
  • the driving element assumes its first end position when the container holder assumes its holding position, and it assumes its second end position when the container holder is removed from the housing.
  • the latching element is releasably latched in both the first end position and in the second end position directly to the driving element.
  • the entrainment element is preferably in at least one guide slot relative to the housing, i. on the actual housing itself or on a housing-fixed element, guided, in particular by one or more corresponding pin.
  • the container holder when mounting on the housing in at least one guide slot, guided in the manner of a bayonet connection, relative to the housing.
  • the latching element is preferably designed in the form of a ring which extends around the axis of rotation and in particular around the feed element.
  • suitable locking lugs may be formed on the ring suitable locking lugs.
  • This locking element can be axially spring-loaded by a separate spring element. This may be, for example, a pressure-loaded coil spring or another type of elastic element.
  • the spring element preferably has the shape of a ring, which surrounds the axis of rotation extends and is curved about an axis perpendicular to the axis of rotation, so that the spring force is generated by compressing the spring element along the axis of rotation.
  • the locking element is formed integrally with the spring element.
  • the locking element may be formed as a projecting in the direction of the axis of rotation projection on the spring element. This is particularly advantageous if the spring element, as described above, has the shape of a curved ring.
  • a conveying device for conveying the product from a reservoir wherein the conveying device comprises a rotatable input element and a conveying element which can be moved along a feed axis and which is drivable, in particular linearly advanceable, due to a rotation of the input element,
  • a rotatable metering device for adjusting a dose of the product to be administered and for tensioning the drive device
  • a triggering device that is movable to trigger a delivery from a rest position to a triggering position.
  • the device then preferably comprises two clutches. Each of the clutches can assume a engaged and a disengaged position.
  • a first clutch is formed between the drive device and the input member of the conveyor. In an engaged position of this clutch, the drive means and the input member of the conveyor are rotatably connected to each other while these parts are disengaged from each other in a disengaged position are.
  • a second clutch is formed between the metering device and the drive device. In an engaged position of this coupling, the metering device and the drive means are rotatably connected to each other and released from each other in a disengaged position.
  • the couplings can be operated by the tripping device. In the rest position of the tripping device, the first clutch assumes its disengaged position and the second clutch assumes its engaged position. In this way, a rotation of the metering device to the drive device, but not on the conveyor is transferable. As a result, a tensioning of the drive device is made possible by a rotation of the metering device, without the conveyor being moved.
  • the metering device is preferably releasably fixed torque-fixed relative to the housing, preferably via a ratchet connection, i. a snap-in connection which is resiliently releasable by rotation of the metering device in at least one direction (the metering direction) and engages in a plurality of predefined angular positions.
  • a movement of the triggering device from the rest position to the release position preferably causes first engaging the first clutch and then or simultaneously disengaging the second clutch.
  • the engagement of the first clutch causes the drive means to be coupled to the conveyor.
  • no drive movement is possible because the drive device is still held by the metering device via the second clutch. Only after the second clutch is disengaged, the drive means is released, and the resulting drive movement is transferable to the conveyor.
  • both clutches are uncoupled in a state in which the container holder is detached from the housing. This is preferably achieved by a proximal displacement of an axially displaceable guide element as described above.
  • the proposed arrangement thus enables a defined interaction of the metering device, the drive device and the conveyor.
  • the metering device is fixable via a ratchet connection relative to the housing, this is preferably designed as a double slip clutch, which allows a manual rotation of the metering device relative to the housing both in a first direction of rotation for increasing the dose to be administered and in an opposite direction of rotation for reducing the dose , In this way, a very simple dose correction is possible.
  • the ratchet connection preferably has a spring-loaded toothing between a rotationally fixed to the metering element and an element rotatably fixed to the housing.
  • the toothing is preferably designed asymmetrically, so that for loosening the ratchet connection when turning back the metering device against the metering direction a larger torque is required than for a release of the compound in the metering , Overall, it can thus be achieved that the user of the injection device has to apply a comparable torque during dosing and during a dose correction.
  • the ratchet connection is formed by an axial toothing of two ratchet elements, ie the ratchet connection comprises two axially opposing ratchet elements, on the front sides of which teeth are formed.
  • a first of the ratchet elements can be designed as an axially movable, direction of the second ratchet element spring-loaded ratchet ring, which is arranged rotationally fixed to the dosing, and the second ratchet member may be rotatably and non-slidably connected to the housing.
  • the ratchet ring may be spring loaded by a plurality of springs disposed along the circumference of the ratchet ring. This results in a smaller footprint than in an embodiment in which the ratchet ring is spring-loaded, for example, by a coil spring extending around the feed pocket.
  • an optional third clutch can be provided. This is preferably formed between the housing and the conveying device.
  • the conveyor In a coupled position, the conveyor is non-rotatably connected to the housing (directly or via a housing non-rotatable element).
  • the third clutch in the engaged position prevents any rotational movement of the conveyor and an unintentional administration of the product caused thereby.
  • the conveyor and the housing In a disengaged position, however, the conveyor and the housing are released from each other, so that in this position, a movement of the conveyor and thus an administration of the product is possible.
  • the third clutch In the rest position of the tripping device, the third clutch assumes its engaged position and thus prevents unintentional movement of the conveying device.
  • a movement of the triggering device from the rest position to the release position causes first engaging the first clutch, then disengaging the second clutch and finally disengaging the third clutch.
  • the third clutch provides an effective safeguard against inadvertent administration, which is released only when the device is otherwise completely ready to effect administration.
  • the administration is preferably carried out by pressing the triggering device axially in a distal direction relative to the housing.
  • the triggering device is preferably movable along the feed axis between the rest position and the release position.
  • Each of the clutches includes a clutch input member and a clutch output member.
  • the release device causes by their axial displacement along the feed axis a relative displacement of these members, whereby they are mutually engageable or disengageable.
  • the triggering device is designed as a push button, which can be pressed into the housing along the feed axis. This is preferably drawn into the housing when the container holder is released from the housing.
  • the triggering device comprises, for example, a sleeve which surrounds the proximal end of the housing at least partially along the circumferential direction.
  • Each of the couplings is preferably formed by longitudinal grooves and longitudinal ribs on radial inner and outer surfaces of the respective coupling input member or coupling output member. These longitudinal grooves and longitudinal ribs can be brought by mutual longitudinal displacement of the Kupplungseingangs- and coupling output members in and out of engagement in the manner of a tongue and groove connection. Such an arrangement is opposite to other conceivable forms, e.g. frontal gears or helical gears, very compact, and it allows, for example, a coupling input member extending in both the proximal and distal direction beyond the corresponding coupling output member.
  • the entire drive device is displaceably arranged along the feed axis, so that the movement of the triggering device from the rest position into the release position causes a distal displacement of the drive device from its starting position.
  • the drive device is preferably spring-loaded along the feed axis in the proximal direction in order to ensure an automatic return of the drive device to its starting position at the end of the administration.
  • Other springs for this purpose can be omitted, since the spring-loaded drive means also pushes back the triggering device in the rest position.
  • FIG. 1 is an exploded perspective view of an injection device according to a first embodiment
  • FIG. 2 shows a longitudinal section through the injection device of FIG. 1;
  • FIG. 3 shows an enlarged detail from FIG. 2;
  • FIG. 4 shows a longitudinal section through an arrangement of a guide sleeve and a coupling sleeve in the injection device of FIG. 1;
  • Fig. 5A is a plan view of a ball bearing ring
  • Fig. 5B is a sectional view of the ball bearing ring in the plane A - A;
  • Fig. 6 is a perspective view of a coupling sleeve
  • Fig. 7 is a longitudinal section through selected parts of the injection device of Figure 1;
  • FIG. 8 is a perspective view of a bayonet sleeve
  • Fig. 9A is a plan view of a bayonet spring
  • Fig. 9B is a side view of the bayonet spring of Fig. 8A;
  • FIG. 9C is a perspective view of the bayonet spring of Fig. 8A;
  • FIG. 10 shows a longitudinal section through selected parts of the injection device of FIG. 1;
  • FIG. 10 shows a longitudinal section through selected parts of the injection device of FIG. 1;
  • 11A is a longitudinal section through selected parts of the injection device of Figure 1 with a dose-limiting ring in its end position ..;
  • 11 B is a longitudinal section through selected parts of the injection device of Figure 1 with the dose-limiting ring in its initial position ..;
  • Fig. 12A is a perspective view of a coupling shaft with a dose limiting ring of the injection device of Fig. 1;
  • FIG. 12B shows the parts of FIG. 13A in an exploded view
  • FIG. FIG. 12C shows the coupling shaft of FIG. 13A in a perspective view from another viewing direction
  • Fig. 13 is an exploded view of a locking sleeve, a clutch spring and a support ring;
  • Fig. 14 is a perspective view of selected parts of the injection device of Fig. 1;
  • Fig. 15 is an exploded perspective view of the proximal end of the injection device of Fig. 1;
  • FIG. 16 shows a longitudinal section through the injection device of FIG. 1 in the starting position
  • FIG. 17 shows the longitudinal section of FIG. 16 with the push-button pushed in
  • FIG. 18 shows the longitudinal section of FIG. 16 after a first metering up to half the maximum dose
  • FIG. 19 shows the longitudinal section of FIG. 16 after a first metering up to the full maximum dose
  • FIG. 20 shows the longitudinal section of FIG. 16 after a first triggering and a second metering
  • FIG. 21 shows a longitudinal section through the injection device of FIG. 1 after complete emptying of the carpule
  • Fig. 22 is a perspective view of the injection device of FIG. 1 after
  • Fig. 23 is a longitudinal section through an injection device according to a second embodiment.
  • FIG. 1 shows an injection device in the form of an injection pen in an exploded perspective view.
  • Fig. 2 shows the device in longitudinal section. The following description refers to the apparatus in the assembled state as shown in FIG.
  • the injection device has a housing sleeve 20, in which a mechanism for setting and pouring a dose is housed.
  • the housing sleeve 20 is substantially circular cylindrical and thereby defines a longitudinal axis.
  • a container holder in the form of a cartridge sleeve 30 is releasably attached to a distal end of the housing sleeve 20 via a bayonet connection described in more detail below. This takes a container in the form of a carpule 40 with a liquid drug in which a plug 41 is slidably guided. This limits a drug reservoir R of variable volume within the carpule.
  • a container may be present, whose volume is variable, for example, a container with concertina-like folded walls in the manner of a bellows.
  • a needle holder 31 is screwed, which carries a hollow needle (cannula) 32 serving as an injection needle, the proximal end of which projects through a sealing septum into the medication reservoir R.
  • a peelable needle shield 33 surrounds the forwardly projecting portion of the needle 32 and protects a user from accidental puncturing.
  • a retaining ring 11 is mounted with locking arms 12 extending in the proximal direction.
  • the ends of the latching arms 12 are releasably latched to the cartridge sleeve 30. While the invention is explained here with reference to an injection device having a needle 32, it is also conceivable that the injection device has a plurality of needles or no needle as in a jet injector.
  • a metering sleeve 60 is rotatably disposed therein with a push button 80.
  • the dosing sleeve serves to set a dose to be dispensed from the medicament reservoir R and to tension a drive device with a drive element in the form of a diagrammatically indicated only, acting as a torsion spring coil spring 310.
  • the set dose is displayed on a display drum 70 and can through a window 21 in the Housing sleeve 20 are read, which is covered by a transparent cover 22. Correcting (reducing) the set dose is possible in a simple manner by turning back the dosing sleeve 60. Below is explained in detail with reference to the other figures, as this setting is made possible.
  • the distal direction is the direction in which the administration takes place, i. it points along the longitudinal axis of the push button 80 in the direction of the hollow needle 32.
  • the proximal direction is defined accordingly as the opposite direction. If reference is made to a direction of rotation (clockwise, counterclockwise), this refers to the sense of rotation that is perceived when looking along the longitudinal axis in the distal direction.
  • the hollow needle 32 is pierced through the skin of the patient, and it is triggered a dose distribution by the user presses the push button 80 into the dosing sleeve 60.
  • a rotational movement is generated by the drive means, which is converted into a propulsion of a conveying element in the form of a feed sleeve 90 in the distal direction.
  • the feed sleeve 90 pushes the stopper 41 of the medicament bobbin 40 by a set amount in the distal direction via a feed flange 100 arranged at its distal end, whereby the release of the medicament from the reservoir R is effected.
  • the feed sleeve 90 thus acts as Piston rod for the piston formed by the feed flange 100 and the plug 41. After the end of the administration, the user releases the push button 80 again.
  • the display drum is entrained during the advance of the feed sleeve 90 of the drive device such that it returns to its zero position in the course of the distribution. Thus, the injection pen is immediately ready for the next dose setting.
  • the feed sleeve 90 is almost completely extended, this is detected by a dose limiting device described in detail below in the Injetationspen.
  • the dose limiting device then only allows the user to set a maximum of the remaining available residual dose.
  • the dose limiting device as well as the display drum 70 automatically return to the initial state. So no manual reset is required.
  • FIG. 3 shows an enlarged view of the rear (proximal) region of the injection device of FIG. 1.
  • the structure of this region will now be described in detail, essentially from the inside to the outside.
  • the feed sleeve 90 is rotatably and rotatably mounted in a longitudinal direction in a rotatably and slidably disposed to the housing guide sleeve 110 again.
  • the feed sleeve 90 at its proximal end a plurality of radially outwardly projecting ceremoniessnocke ⁇ 91, which are guided in complementary longitudinal grooves on the inside of the guide sleeve 110.
  • the guide sleeve 110 is particularly well visible in the Fig. 4, which illustrates the interaction of the guide sleeve with other parts.
  • the guide sleeve 110 has at its distal end a radially outwardly projecting, circumferential annular flange 111 with radial bores 112.
  • An annular bearing holder 130 is pushed from the proximal side over the guide sleeve 110, surrounds the annular flange 111 radially and is rigidly connected to the drawing via radial dowel pins.
  • a coupling sleeve 120 is rotatably supported between the annular flange 111 of the guide sleeve 110 and an inwardly projecting shoulder 132 of the bearing holder 130.
  • the coupling sleeve 120 is connected via a threaded rod 180 with the feed sleeve 90 and therefore forms part of a conveyor, which is driven by a rotational movement and causes a feed of the conveying element in the form of the feed sleeve.
  • the coupling sleeve 120 therefore absorbs considerable axial forces during operation, which are transmitted via their bearing to the guide sleeve 110, the bearing holder 130, the mechanism holder 150 and thus ultimately to the housing.
  • a first ball bearing ring 140 is provided between the flange 111 of the guide sleeve and a radially circumferential flange 124 of the coupling sleeve 120.
  • Another such ball bearing ring 140 is disposed between the flange 124 and an end face of the bearing holder 130.
  • the ball bearing ring 140 is shown in detail in FIGS. 5A and 5B. He carries a plurality of bearing balls 141 (here twelve pieces). These run, as can be seen in FIG. 3, in flat, circular grooves which are formed in both end faces of the radial flange 124 of the coupling sleeve 120, in the corresponding end face of the flange 111 of the guide sleeve 110 and in the end face of the bearing holder 130 are.
  • the coupling sleeve 120 is shown together with the ball bearing rings 140 (but without balls 141) in FIG. 6.
  • a plurality of longitudinal ribs 122 are formed on the cylindrical sleeve body 121, which extend over a considerable part of the length of the sleeve body in the longitudinal direction up to its proximal end. In between there are corresponding grooves.
  • a thickening 123 is followed by the flange 124, which adjoins the ball bearing rings 140 on both sides.
  • FIG. 7 shows how the unit consisting of guide sleeve 110 and bearing holder 130 is held in a sleeve-shaped mechanism holder 150 in a rotationally fixed manner but displaceable in the longitudinal direction.
  • the mechanism holder 150 has a distal section 151 with an enlarged inner and outer diameter and a proximal section 152 with a somewhat smaller inner and outer diameter. These two sections are connected by a step 153.
  • the outside of the distal portion 151 is held rigidly in the housing sleeve 20. Thus, therefore, the entire mechanism holder 150 relative to the housing immovable, so functionally forms part of the housing.
  • the mechanism holder 150 Adjacent to the step 153, at least two longitudinal slots 154 are formed in the mechanism holder 150.
  • pins are used, which are not shown in Fig. 7. These protrude radially beyond the bearing holder 130 and into the longitudinal slots 154 of the mechanism holder.
  • the bearing holder 130 and the guide sleeve 110 fixedly connected thereto are displaceably guided in the longitudinal direction between a distal and a proximal end position and secured against rotation in the mechanism holder 150.
  • an external thread 157 is formed on the outer lateral surface of the mechanism holder 150.
  • On the inner surface several longitudinal grooves 158 are formed in this area.
  • a bayonet sleeve 160 adjoins the guide sleeve 110 and the bearing holder 130, which is also shown in FIG. 8. It is held on the bearing holder 130 in the axial direction and rotatable relative thereto. With an inwardly projecting annular flange 161, it supports the unit of guide sleeve 110 and bearing holder 130 with the coupling sleeve 120 held therein in the distal direction.
  • the bayonet sleeve 160 has two axially projecting in the distal direction and diametrically opposite arms 162 having radial openings 163.
  • radially outwardly projecting pins are used, which run in two as slide guides (positive guides) acting guide slots 155 of the mechanism holder 150.
  • These guide slots 155 are designed so that the bayonet sleeve 160 is forcibly displaced axially in the proximal direction during a rotation in the counterclockwise direction (in the sense of the definition given above, ie when viewed along the longitudinal axis in the distal direction).
  • the unit of guide sleeve 110, bearing holder 130 and coupling sleeve 120 is displaced in the proximal direction.
  • this unit will move clockwise in the distal direction.
  • FIG. 1 Parallel to the guide slots 155 another pair of guide slots 156 extends to receive radial pins 36 of a locking portion 35 of the cartridge case 30 (see Figures 1 and 3).
  • the cartridge tube is subject to a forced guidance, so that the cartridge case 30 performs a combined rotational movement and displacement.
  • the cartridge case 30 is designed so that it is coupled in its movement with the arms 162 of the bayonet sleeve 160 and the bayonet sleeve 160 entrains.
  • the guide slots 155 are of finite length and limit the movement of the bayonet sleeve between a distal and a proximal end position. In Fig. 7, the proximal end position is shown. In particular, the guide slots 155 allow a rotation of the bayonet sleeve 90 degrees between see these positions.
  • a bayonet spring 170 is disposed between the bayonet sleeve 160 and the guide sleeve 110. This is shown in detail in FIGS. 9A to 9C.
  • the bayonet spring 170 has an essentially flat and annular basic body 171 which acts as a spring element. For this basic body protrude two diametrically opposite, axially flat projecting protrusions or projections 172 as locking elements or locking cams axially in the distal direction.
  • the base spring 170 between the guide sleeve 110 and the bayonet sleeve 160 is permanently pretensioned such that the projections 172 are pressed in the distal direction against the corresponding counter surface on the annular flange 161.
  • this counter surface four recesses are present, which are arranged at intervals of 90 degrees about the longitudinal axis. In the proximal end position, the projections 172 come to lie in a first pair of these recesses, while in the distal end position, in which the bayonet sleeve is rotated by 90 degrees, they are received in the second pair of recesses.
  • the carpule sleeve 30, via its coupling with the bayonet sleeve 160, is rotationally and non-displaceably secured to the guide sleeve 110 and therewith with ultimately held on the housing.
  • the carpule sleeve 30 is detached from the housing.
  • the bayonet sleeve 160 is in turn locked in this position with the guide sleeve 110 and thereby fixed to the housing 20 rotationally and non-displaceably. In this way, it is ensured that the cartridge tube when inserted into the guide slots 156, the arms 162 of the bayonet sleeve again in the correct position about the longitudinal axis "finds" and then can take them after releasing the locking connection.
  • the locking elements are formed as projections 172 integral with the spring element in the form of the base body 171.
  • a separate detent element e.g. in the form of a rigid ring with locking cams, be provided, which is pressed by the spring element in the axial direction.
  • the latching element can also have depressions which then interact with corresponding projections of the counter-surface.
  • the locking element is rotationally fixed to the housing. Instead, it can also be rotationally fixed to the bayonet sleeve.
  • the spring element can also be designed differently for generating an axial force. So there are multiple modifications of the lock shown here between the cartridge case 30 and the housing possible.
  • FIG. 10 shows the parts of the injection device shown in FIG. 7 together with further components.
  • the feed sleeve 90 is now inserted into the guide sleeve 110.
  • the feed sleeve 90 has a short internal thread 92, in which a hollow external threaded rod 180 is guided. This is connected at its proximal end via a transverse pin 181 rigidly connected to the coupling sleeve 120.
  • a feed of the feed sleeve 90 in the distal direction is thus carried out by the coupling sleeve 120, which is indeed rotatably mounted, performs a rotational movement.
  • the feed sleeve 90 is supported in this feed movement by a long, loaded on pressure coil spring 190, which is arranged in the interior of the threaded rod 180 and guided on a guide needle 200.
  • the coil spring 190 presses an annular thickening 201 near the distal end of the guide needle 200 in the distal direction against the feed flange 100.
  • An axial pin 202 protrudes into a corresponding blind hole of the feed flange 100 and is rotatable in this blind hole.
  • a substantially cylindrical transmission sleeve 210 which partially surrounds the coupling sleeve 120, is inserted into the mechanism holder 150 from the proximal side.
  • the transmission sleeve 210 has a plurality of longitudinal ribs 212 on the outside.
  • the outer diameter of the transmission sleeve 210 is chosen so that it is freely rotatable in the interior of the mechanism holder 150 despite their outer longitudinal ribs.
  • the transmission sleeve 210 has an internal thread 211 in which a dose-limiting ring 220 runs with a corresponding external thread 221. In the interior of the dose-limiting ring 220, particularly clearly visible longitudinal grooves 222 are present in FIGS.
  • the dose-limiting ring 220 is displaceable on the coupling sleeve in a rotationally fixed manner in the axial direction, and guided in the internal thread of the transmission sleeve 210 on the other hand.
  • a rotation of the coupling sleeve 120 relative to the transmission sleeve 210 thus leads to a rotation and axial displacement of the dose limiting ring 220th
  • the axial displacement range of the dose limiting ring is limited in the distal and in the proximal direction. This will be explained with reference to Figures 11 A, 11 B, 12A and 12B.
  • a coupling shaft 230 is connected to the transmission sleeve 210.
  • the coupling shaft has an axis 231 with a transverse bore 232 near the proximal end 233. From the distal end of the axle, a circumferential flange 234 extends radially outward. From this, in turn, an annular flange 235 extends axially in the distal direction. The outer diameter of the flange 234 is greater than that of the annular flange 235, whereby the flange 234 projects radially beyond the annular flange 235 and forms a stop for the transmission sleeve 210.
  • the annular flange 235 is inserted into the transmission sleeve 210, so that it rests with its proximal end on the flange 234.
  • the annular flange is secured by radial pins in the transmission sleeve 210, which are inserted into bores 237.
  • the coupling shaft 230 and the transmission sleeve 210 are connected to one another in a torque-proof and non-displaced manner.
  • a plurality of longitudinal grooves 238 are formed in the inner surface of the annular flange 235 a plurality of longitudinal grooves 238 are formed.
  • Figures 12A and 12B show the coupling shaft 230 and the dose limiting ring 220 alone.
  • a radial stop 223 is formed, which cooperates with a corresponding radial stop 236 on the annular flange 235 of the coupling shaft.
  • a radial stop is understood to mean a stop surface whose surface normal points essentially in the tangential direction and which is designed to cooperate with a corresponding counter surface. The radial stop is thus stressed primarily in the tangential direction (ie in the direction of rotation) instead of in the axial direction.
  • a radial stop avoids the risk of jamming, which occurs when two parts axially collide with one another via a screw connection, and which is particularly pronounced with a small pitch of the screw thread.
  • the radial stop 236 limits the here Screw movement of the dose limiting ring 220 in the proximal direction.
  • FIG. 11A the dose-limiting ring 220 is shown in the resulting proximal end position, whereas FIG. 11B is shown in a distal starting position.
  • the locking sleeve includes an annular main body 281 from which four arms 282 extending in the distal direction extend in the distal direction.
  • the main body has on its inner surface longitudinal grooves 284 which are interlocked with the longitudinal ribs 122 of the coupling sleeve 120.
  • the locking sleeve 280 is displaceable in the longitudinal direction relative to the coupling sleeve 120, but is secured against rotation in relation to the latter.
  • inwardly extending flange portions 283 are provided at the end of the arms 282.
  • the possible displacement range is limited in the proximal direction by these flange areas.
  • These abut in the proximal end position of the locking sleeve 280, as shown in FIG. 3, to the distal end of the longitudinal ribs 122 of the coupling sleeve 120.
  • longitudinal ribs are formed on the outer peripheral surface of the main body 281. These longitudinal ribs engage in the position of FIG. 3 in the inner longitudinal grooves 158 of the mechanism holder 150 a.
  • the locking sleeve 280 is axially displaceable in this position relative to the mechanism holder 150, but secured against rotation. Ultimately, the locking sleeve 280 secures in this position so the coupling sleeve 120 against rotation in the mechanism holder 150. As will be explained below, however, the locking sleeve 280 is so far displaced in the distal direction that it can come out of engagement with the mechanism holder 150 and relative to this then rotatable together with the coupling sleeve 120.
  • the locking sleeve 280 is biased by a coupling spring 290 in the proximal direction.
  • the clutch spring is in the form of a pressurized loaded coil spring, which surrounds the arms 282 of the locking sleeve 280 and abuts with its proximal end on the distal end side of the main body 281. At the distal end of the clutch spring 290 this is held on a support ring 300 which abuts in the distal direction to the bearing holder 130 and on the inside of which longitudinal grooves are formed.
  • FIG. 14 the unit of FIG. 10 is shown with yet further components.
  • the mechanism holder 150 On the mechanism holder 150, the previously mentioned display drum 70 is now held.
  • a stop sleeve 240 can be seen.
  • the stop sleeve 240 is immovably connected to the housing sleeve 20 by means of pins which project into the radial holes 242 which can be seen in FIG. 14.
  • radial stops 243 are formed. Its proximal end is serrated, i. Teeth 244 are formed on the face side for a ratchet connection to be described later.
  • the display drum 70 has an internal thread, which can be seen in FIG. This runs on the external thread 157 of the mechanism holder, which is particularly well recognizable in Figures 7 and 10. At its proximal end, the display drum 70 tapers to form an annular region 72. Longitudinal grooves are formed on the inner side of the annular region 72. With these longitudinal grooves, the display drum 70 is secured against rotation, but guided displaceably in the longitudinal direction on the longitudinal ribs 212 of the transmission sleeve 210. By combining this longitudinal guide on the transfer sleeve and the thread guide on the mechanism holder, rotation of the transfer sleeve 210 results in combined rotation and longitudinal displacement of the indicator drum 70. This movement is limited by radial stops in both directions.
  • a radial stop cooperates with the radial stop 243 of the stop sleeve 240.
  • a corresponding radial stop 73 cooperates with a radial stop 159 of the mechanism holder 150.
  • the mechanism for setting a dose and triggering the administration of this dose will now be explained with reference to FIGS. 3 and 15.
  • the already mentioned dosing sleeve 60 is arranged. It is axially 29iebegeschreibt with a spring ring 61 and rotatably fixed to the stop sleeve 240.
  • the dosing sleeve 60 can be rotated about the longitudinal axis relative to the housing sleeve 20 via a friction clutch in the form of a ratchet connection in a clockwise as well as counterclockwise direction, whereby it can assume a plurality of predefined detent positions. This mechanism will be explained below.
  • an inner ring 250 is arranged and rigidly connected to the dosing sleeve 60.
  • the inner ring 250 has a plurality of longitudinal grooves in its radial inner surface.
  • a ratchet ring 260 is held axially displaceable, but secured against rotation in the dosing sleeve 60.
  • the ratchet ring 260 is formed jagged on its distal end, complementary to the teeth 244 of the serrated proximal end face of the stop sleeve 240, so that teeth of the ratchet ring 260 can engage in depressions in the end face of the stop sleeve 240 and vice versa.
  • the ratchet ring 260 is axially displaceable between the distal end surface of the inner ring 250 and the serrated proximal end face of the stop sleeve 240 by a certain amount.
  • the amount by which an axial displacement is possible is at least so great that the serrated end faces of the ratchet ring 260 and the stop sleeve 240 can be disengaged.
  • the ratchet ring 260 is resiliently urged against the stop sleeve 240 by a spring force.
  • a plurality of axial bores 251 in the form of blind holes are provided in the inner ring 250.
  • the coil spring 310 By turning the metering sleeve 60 clockwise, the coil spring 310 can be stretched, which is indicated in Fig. 3.
  • the coil spring 310 has a plurality of spring coils which rotate about the longitudinal axis and are arranged one above the other radially to the longitudinal axis.
  • the inner end of the spiral spring 310 is fastened to a spring holding region 311 of the coupling shaft 230, which is particularly clearly visible in FIG. 12C.
  • the outer end of the coil spring 310 is attached to a spring sleeve 320, which is rotatably held in the stop sleeve 240.
  • a clutch plate 270 is mounted and secured by a pin 271 in the transverse bore 232 of the coupling shaft 230 against rotation and displacement.
  • the clutch disc 270 has a plurality of longitudinal ribs on its outer peripheral surface. In the position of FIG.
  • the metering sleeve 60 has an axial passage opening, in which the Push button 80 is arranged axially displaceable.
  • the push button 80 is with a plurality of radially resilient arms 81 rotatably and non-displaced clicked on the proximal end 233 of the coupling shaft 230. He pushes with its distal end against a proximal end face of the clutch disc 270.
  • Inside the push button 80 is a coil spring 82 which rests with its proximal end on the inner end face of the push button and presses with its distal end against a support ring 83.
  • the support ring 83 has on its outer circumferential surface longitudinal ribs which are guided in corresponding longitudinal grooves in the inner jacket surface of the push button 80.
  • the support ring 83 in the push button 80 rotatably and axially displaceable.
  • At its distal end face of the support ring 83 is formed flat jagged.
  • the proximal end face of the clutch disc 270 is designed to be jagged in a complementary manner, so that the support ring 83 is axially toothed with the clutch disc 270.
  • the clutch disc 270 rotates relative to the support ring 83.
  • the serrated surfaces slide on each other, so that the teeth alternately into and out of engagement. This produces a distinctive clicking sound that indicates to the user that an administration is taking place.
  • the toothing of the support ring 83 and the clutch disc 270 is preferably designed such that each click corresponds to just one unit (or a predetermined multiple of a unit) of the administered medicament.
  • the entire mechanism for setting the dose and the distribution is splash-proof housed in the housing sleeve 20.
  • a total of four seals D1, D2, D3 and D4 are present.
  • the seal D1 comprises a sealing ring, which bears sealingly between the mechanism holder 150 and the bayonet sleeve 160.
  • the mechanism holder 150 is immovable and tightly mounted in the housing 2, while the bayonet sleeve 160 relative to the mechanism holder 160 is both displaceable and rotatable and over the Seal D1 is sealed relative to the housing.
  • the seal D2 comprises a further, here flat-shaped sealing ring which bears sealingly between the bayonet sleeve 160 and the smooth outer side of the feed sleeve 90.
  • the feed flange 100 is arranged tightly on the feed sleeve 90.
  • the region of the injection device located proximally from the bayonet sleeve 160, including the interior of the advancing sleeve 90, is completely sealed against the area lying distally therefrom. If fluids should reach this distal area, eg due to a breakage of the drug bundle 40, they can not penetrate into the difficult mechanics and cause them to become dirty or stick together.
  • the other two seals are located at the proximal end of the injection device.
  • the seal D3 comprises a sealing ring which bears sealingly between the dosing sleeve 60 and the stop sleeve 240.
  • the stop sleeve 240 is immovable and tightly mounted in the housing sleeve 20, while the metering sleeve 60 relative to the stop sleeve 240 is rotatable.
  • the seal D4 comprises a further sealing ring, which rests sealingly between the dosing sleeve 60 and the push button 80.
  • a transparent window cover 22 is placed liquid-tight on the window 21.
  • the entire mechanism which is limited to the outside through the housing sleeve 20, the metering sleeve 60 and the push button 80, also completely sealed to the outside and so completely protected against the ingress of liquids. Even a rain shower or accidentally overturned by the user glass of water can therefore not harm the injection device.
  • the seal to the feed sleeve out is preferably designed such that it acts as a scraper, similar to a windscreen wiper in the car.
  • at least to the distal side preferably a smallest possible contact angle between the surfaces of the sealing element and the feed sleeve. This can be below 90 degrees.
  • the parts to be sealed to one another have a hydrophobic surface, in particular be formed from or coated with a hydrophobic material.
  • a hydrophobic surface prevents the parts from being wetted.
  • water droplets emit water and creep of liquids through gaps between the parts to be sealed due to capillary effect is effectively prevented.
  • the provided with a hydrophobic surface, against each other to be sealed parts can therefore be arranged at a certain distance (gap) to each other without the sealing effect is lost ("virtual seal").
  • a hydrophobic surface is understood here to mean a surface for which the contact angle of a water droplet is at least 90 degrees, preferably at least 110 degrees.
  • the contact angle is the angle between the surface normals of the water droplet and the respective surface at the contact point.
  • materials having hydrophobic properties are PTFE (polytetrafluoroethylene) or PVDF (polyvinylidene fluoride). Many other materials, especially for thin coatings in the range of a few micrometers, are known.
  • the surfaces can be micro- or nanostructured, ie provided with structures whose dimensions are in the nanometer to micrometer range. These structures can be one Preferred direction to inhibit the flow of liquids on the surface in one direction. For example, scales can be provided.
  • FIG. 16 in which the injection device is shown in its initial position before the first use.
  • the above-explained mechanism for setting and dispensing a dose has three clutches K1, K2, and K3 for the transmission of torques. Each of these couplings can be brought into and out of engagement with each other by an axial movement of two components.
  • the coupling K1 is formed by the longitudinal grooves on the inner surface of the axial flange 235 of the coupling shaft 230 as a coupling input member in cooperation with the longitudinal ribs 122 on the outside of the coupling sleeve 120 (see Fig. 5) as a coupling output member. In the position of Fig. 16, this coupling is disengaged, that is, the teeth formed by the longitudinal grooves and longitudinal ribs is disengaged.
  • the coupling K1 can be coupled by an axial displacement of the coupling shaft 230 in the distal direction.
  • the coupling K2 is formed by the longitudinal grooves in the radial inner surface of the inner ring 250 as a coupling input member in cooperation with the longitudinal ribs on the radial outer surface of the clutch disc 270 as a coupling output member. In the position of Fig. 16, this coupling is engaged, that is, the teeth formed by the longitudinal grooves and longitudinal ribs are engaged.
  • the clutch K2 can be disengaged by an axial displacement of the clutch disc 270 in the distal direction.
  • the coupling K3 is through the longitudinal ribs on the outside of the outer Ring flange 282 of the locking sleeve 280 formed as a coupling input member in cooperation with the longitudinal grooves 158 on the inner surface of the mechanism holder 150 as a coupling output member. In the position of FIG. 13, this coupling is engaged. It can be disengaged by an axial displacement of the locking sleeve 280 in the distal direction.
  • All three clutches K1, K2 and K3 can be engaged or disengaged by the push button 80 is moved far enough axially. Thereby a certain order is kept.
  • the clutch disc 270 and the clutch shaft 230 connected to it are displaced in the distal direction.
  • the clutch K1 engages, i.e., the clutch shaft is coupled to the clutch sleeve 120 for torque transmission.
  • the coupling shaft 230 advances the transmission sleeve 210 in the distal direction. This takes the locking sleeve 280 in the distal direction, whereby the clutch spring 290 is compressed.
  • FIG. 19 which will be described in more detail later, shows the injection device when the push-button 80 is fully depressed.
  • the clutch K1 is now engaged while the clutches K2 and K3 are disengaged.
  • the push button 80 is released, the engagement of the clutches takes place in the reverse order.
  • the clutch spring 290 pushes the locking sleeve 280, the transmission sleeve 210, the clutch shaft 230, the clutch disc 270 and the push button 80 back into the distal starting position.
  • a first unit is formed by the housing sleeve 20, the mechanism holder 150, the stop sleeve 240 and the spring ring 320.
  • This unit may be functionally interpreted as a holding device or a housing in an expanded sense. It represents the stationary reference system for all movements.
  • a second unit is formed by the metering sleeve 60, the inner ring 250 and the ratcheting ring 260. It can be functionally understood as a rotatable metering device. This metering device is detachable via the ratchet connection on the housing, but held torque-resistant up to a certain value.
  • a third unit is formed by the clutch disc 270, the clutch shaft 230 and the transmission sleeve 210, which are all rigidly connected to each other, and by the associated coil spring 310, which acts as the actual drive element.
  • This unit can be understood as a drive device.
  • the rotational movement of the drive device is limited by two limiting elements, both of which are guided on the transmission device.
  • the first limiting element is formed by the indicating drum 70, which limits the range of movement of the drive device in both directions, a metering direction and a correcting and dispensing direction.
  • the second limiting element is formed by the dose limiting ring 220, which covers the range of movement of the drive device. least in one direction, the metering direction, regardless of the first limiting element limited.
  • the drive device can be detachably coupled in a rotationally fixed manner to the metering device by the clutch K2, which makes it possible to tension the drive element in the form of the spiral spring 310.
  • a fourth unit comprises the coupling sleeve 120 and the threaded rod 180, which form a rigid unit, the elements on which these parts are mounted, namely the guide sleeve 110, the bearing holder 130 and the ball bearing rings 140, and the feed sleeve 90.
  • This unit provides a Conveying device, which converts a rotational movement of an input member in the form of the coupling sleeve 120 in a feed of the conveying element in the form of the feed sleeve 90.
  • Your input member is releasably rotatably coupled by the clutch K1 with the drive device.
  • the holding device i.e., the housing
  • a triggering device which primarily comprises the push button 80 and serves to operate the clutches K1 to K3.
  • the injection device is operated as follows. Starting from the starting position of FIG. 16, a dose to be administered is initially set. For this purpose, the dosing sleeve 60 is rotated clockwise. The dosing sleeve takes over the clutch K2 the clutch disc 270 and the clutch shaft 230 with. As a result, the coil spring 310 is wound up. The resulting torque is maintained by the ratchet connection between the co-rotating ratchet ring 260 and the stationary stop sleeve 240. By the rotation of the coupling shaft 230 and the transmission sleeve 210 and the display drum 70 guided thereon are also rotated.
  • the display drum 70 is also displaced axially in the proximal direction because of their thread guide on the mechanism holder 150, thus performs a total of a screw movement in the proximal direction. This causes marks on the surface of the Display drum 70 under the window 21 and indicate the currently set dose. Furthermore, due to its threaded engagement with the interior of the transmission sleeve 210 and due to its rotationally secured arrangement on the coupling sleeve 120, the dose limiting ring 220 is displaced in the proximal direction.
  • Fig. 17 shows the injection device after half the maximum single dose has been set.
  • the display drum has moved halfway between its distal and proximal end positions to the rear.
  • the dose limiting ring 220 has moved in the proximal direction by an amount proportional to the set single dose.
  • the rotation of the metering sleeve 60 in the clockwise direction is limited on the one hand by the maximum range of movement of the display drum 70, on the other hand by the maximum range of movement of the dose limiting ring 220.
  • the display drum 70 comes after a predetermined number of revolutions of the dosing sleeve 60 with its proximal radial stop against the stop sleeve 240, unless the rotation of the dosing sleeve 60 has not previously been limited by the dose limiting ring 220, as described in more detail below. As a result, further rotation of the dosing sleeve 60 is no longer possible. This position corresponds to the maximum adjustable single dose. This situation is shown in FIG.
  • the dosing sleeve 60 can be turned counterclockwise against the force of the ratchet connection. Since the ratchet connection additionally has to absorb the torque of the spiral spring 310 in this direction, the ratchet connection is designed asymmetrically.
  • the front-side toothing has a larger pitch angle on the side which is loaded by a torque which acts counterclockwise on the dosing sleeve on than on the side which is loaded at a torque in a clockwise direction (see the configuration of the teeth 244 in Fig. 14).
  • the distribution of the dose thus set takes place by pressing the push button 80.
  • the clutch K1 is engaged.
  • the clutch K2 disengages.
  • the rotationally fixed connection between the metering sleeve 60 on the one hand and the coupling shaft 230 with the coupling sleeve 120 now coupled and threaded rod 180 on the other hand is canceled. This causes the ratchet connection no longer absorbs the torque of the coil spring 310.
  • the system is still rotatably held on the clutch K3 in the mechanism holder 150 and thus in the housing sleeve 20.
  • the clutch K3 also disengages.
  • the torque of the coil spring 310 is released and acts on the threaded rod 190 via the coupling shaft 230 and the coupling sleeve 120.
  • these parts are set in a counterclockwise rotation.
  • the feed sleeve 90 undergoes an axial displacement in the distal direction.
  • the feed sleeve pushes the plug 41 in the carpule 40 before. In this way, the drug is released.
  • the display drum 70 is again entrained counterclockwise by the rotation of the transfer sleeve 210, and is thereby again distally moved because of its threaded engagement with the stationary mechanism holder 150 until it resumes its distal home position. In this position, it is prevented by a radial stop on further rotation, whereby the distribution is terminated. After the end of the distribution, the display drum again displays the dose "zero".
  • the payout can be interrupted at any time by the push button 80 is released. As a result, the clutches K3 and K2 engage again, and the clutch K1 disengages again.
  • the display drum 70 indicates the remaining remaining dose that is still being dispensed when the push button is pressed again, thereby continuing the dispensing.
  • the dose-limiting ring 220 maintains its axial position during dispensing, as the transmission sleeve 210 and the coupling sleeve 120, between which the dose-limiting ring 220 is located, rotate synchronously.
  • the injection device After the end of the distribution, the injection device is ready for the next injection process.
  • the feed sleeve 90 has migrated in the distal direction in accordance with the distributed dose.
  • the dose-limiting ring 220 has also migrated by a proportional amount in the proximal direction.
  • the state after the end of the injection corresponds to the initial state of FIG. 16.
  • the advancement sleeve 90 moves further in the distal direction, while the dose-limiting ring 220 moves in the proximal direction. This is illustrated in FIG.
  • the maximum axial travel by which the dose-limiting ring 220 can travel in the proximal direction in the transfer sleeve corresponds to the contents of a completely filled carpule.
  • the dose limiting ring 220 reaches its proximal end position and, with its radial stop, abuts the axial annular flange 235 of the coupling shaft 230, as shown in FIG. 12A.
  • the metering sleeve 60 is prevented from further rotating in a clockwise direction.
  • no larger dose can be set than the dose corresponding to the remaining amount of the drug in the carpule.
  • Fig. 20 shows this situation, in which no more metering is possible, although the display drum is in the distal starting position, ie the zero position. Accordingly, the feed sleeve 90 has reached its distal end position, so it is maximally extended.
  • the cartridge sleeve 30 is released against the elastic resistance of the bayonet spring 170 from the mechanism holder 150 and out through the corresponding guide slot 156 in the mechanism holder out.
  • the bayonet sleeve 160 is forcibly also twisted along its own, parallel guide slot 155 and simultaneously displaced in the distal direction.
  • the guide sleeve 110 is pulled in the distal direction.
  • the feed sleeve 90 was not yet maximally extended before the carpule change, so had not yet reached its distal end position.
  • the coil spring 190 now presses the guide needle 200, the feed flange 100 and the feed sleeve 90 in the distal direction.
  • the threaded rod 180 is rotated via its screw connection with the interior of the feed sleeve 90 in rotation.
  • the threaded rod 180 takes in particular the coupling sleeve 120 and the dose-limiting ring 220.
  • the dose limiting ring 220 is displaced in this rotation by its threaded engagement with the transmission sleeve 210 in its proximal end position. Once the dose limiting ring 220 has reached this starting position, it prevents further rotation of the coupling sleeve 120 and the threaded rod 180, so that no further extension of the feed sleeve 90 is possible. The feed sleeve 90 has now reached its distal end position. This situation is shown in FIG. Overall, so now is the display drum 70 in the neutral position, the dose limiting ring 220 in the proximal end position and the feed sleeve 90 in its distal end position.
  • a new carpule 40 is inserted into the cartridge case 30, and the cartridge case 30 with the carpule 40 received therein is axially guided in the proximal direction against the housing sleeve 20.
  • the plug 41 of the carpule presses the feed flange 100 and the feed sleeve 90 against the force of the coil spring 190 in the proximal direction.
  • the threaded rod 180 is rotated.
  • the threaded rod again takes the coupling sleeve 120 and the dose limiting ring 220 with.
  • the dose limiting ring is moved in the distal direction, ie in the direction of its initial position due to its threaded engagement with the transmission sleeve 210.
  • the amount by which it is displaced in this direction corresponds to the dose present in the carpule 40.
  • the dose-limiting ring 220 migrates to its distal starting position.
  • the cartridge sleeve 30 is then inserted into the mechanism holder 150, wherein the radial pin 36 of the cartridge sleeve 30 again engage in the guide slots 156 in the mechanism holder 150 (see Figures 1 and 3).
  • the bayonet sleeve 160 is forced to follow the movement of the cartridge sleeve 30 in the corresponding guide slots.
  • the bayonet sleeve 160 is thereby returned to its proximal end position, in which it is releasably locked by the bayonet disc 170 (see Figures 8 to 10).
  • the injection device is now back in the starting position of Fig. 16 and is available after screwing a new needle holder 31 for a new sequence of administrations available.
  • FIG. 21 shows as a variant a second embodiment of the injection device according to the invention.
  • the operation is substantially the same as in the first embodiment.
  • Like-acting parts are therefore designated by the same reference numerals as in the first embodiment. In the following, only the essential differences will be discussed.
  • the stop sleeve 240 omitted. Their function is taken over by the correspondingly elongated housing sleeve 20.
  • the drive device which is formed in the first embodiment, apart from the coil spring 310, from the clutch plate 270, clutch shaft 230 and transmission sleeve 210 is here formed by other parts, namely by a connecting shaft 400 (with integrally formed thereon clutch disc 401), a closed at the proximal end of the first transmission sleeve 410 and a distal thereto subsequent second stressesshül- se 420. These three parts are in turn rigidly interconnected.
  • the display drum served not only to display the set dose, but also to limit the maximum adjustable single dose in the dosing and to limit the movement in the discharge direction, the latter function is adopted by a second dose limiting ring 430 in the second embodiment , This is rotatably, but axially displaceably guided in the housing sleeve 20. With an internal thread, it runs on a corresponding external thread of the first transmission sleeve 410. Its axial movement is limited by two radial stops between a distal starting position, which corresponds to the zero position, and a proximal end position, which corresponds to the maximum adjustable dose. In this way, it takes over the stop functions of the display drum according to the first embodiment.
  • the display drum 70 is guided in the second embodiment via a rigidly connected to it driving sleeve 440 axially and rotatably on the second transmission sleeve 420. Their operation is otherwise the same as in the first embodiment.

Abstract

Appareil d'injection comportant un boîtier (20) et un élément d'extraction (90) mobile par rapport au boîtier. Pour réduire à un minimum les pertes par friction, ledit appareil comporte au moins un roulement à billes (140) destiné à absorber les forces qui sont transmises entre l'élément d'extraction et le boîtier. Ledit roulement à billes transmet de préférence des forces axiales de l'élément d'extraction au boîtier. Ce roulement à billes peut être placé de manière peu encombrante dans une partie distale dudit appareil d'injection.
EP07720136A 2006-09-15 2007-05-11 Appareil d'injection à entraînement à faibles pertes Withdrawn EP2073872A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH14752006 2006-09-15
PCT/CH2007/000239 WO2008031235A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à entraînement à faibles pertes

Publications (1)

Publication Number Publication Date
EP2073872A1 true EP2073872A1 (fr) 2009-07-01

Family

ID=38320161

Family Applications (8)

Application Number Title Priority Date Filing Date
EP07720139A Withdrawn EP2076302A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à dispositif de limitation de dose à rappel automatique
EP07720136A Withdrawn EP2073872A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à entraînement à faibles pertes
EP22188664.1A Pending EP4159257A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection pourvu d'élément de transport amélioré
EP20177292.8A Active EP3738626B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection a element d'extraction ameliore
EP07720137A Withdrawn EP2066373A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection protégé contre les éclaboussures d'eau
EP07720138.2A Active EP2077878B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à élément d'extraction amélioré
EP19202165.7A Active EP3626289B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à élément d'extraction amélioré
EP07720140.8A Active EP2076303B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à plusieurs accouplements

Family Applications Before (1)

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EP07720139A Withdrawn EP2076302A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à dispositif de limitation de dose à rappel automatique

Family Applications After (6)

Application Number Title Priority Date Filing Date
EP22188664.1A Pending EP4159257A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection pourvu d'élément de transport amélioré
EP20177292.8A Active EP3738626B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection a element d'extraction ameliore
EP07720137A Withdrawn EP2066373A1 (fr) 2006-09-15 2007-05-11 Appareil d'injection protégé contre les éclaboussures d'eau
EP07720138.2A Active EP2077878B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à élément d'extraction amélioré
EP19202165.7A Active EP3626289B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à élément d'extraction amélioré
EP07720140.8A Active EP2076303B1 (fr) 2006-09-15 2007-05-11 Appareil d'injection à plusieurs accouplements

Country Status (9)

Country Link
US (10) US20090247960A1 (fr)
EP (8) EP2076302A1 (fr)
JP (5) JP2010503430A (fr)
CN (5) CN101594898B (fr)
DE (1) DE102007022791A1 (fr)
DK (2) DK2076303T3 (fr)
HU (2) HUE060243T2 (fr)
PL (2) PL2076303T3 (fr)
WO (5) WO2008031239A1 (fr)

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US20120197213A1 (en) 2012-08-02
EP2076303B1 (fr) 2018-07-18
US8491538B2 (en) 2013-07-23
CN101594896A (zh) 2009-12-02
US8834431B2 (en) 2014-09-16
US20090254044A1 (en) 2009-10-08
PL2076303T3 (pl) 2019-05-31
WO2008031239A1 (fr) 2008-03-20
US20190247587A1 (en) 2019-08-15
US11458257B2 (en) 2022-10-04
US20090247960A1 (en) 2009-10-01
JP2010503433A (ja) 2010-02-04
HUE053543T2 (hu) 2021-07-28
EP2077878B1 (fr) 2020-01-01
WO2008031235A1 (fr) 2008-03-20
DK2076303T3 (en) 2018-11-05
EP2077878A1 (fr) 2009-07-15
CN101563123B (zh) 2012-08-29
JP2010503434A (ja) 2010-02-04
CN101563123A (zh) 2009-10-21
CN101594898A (zh) 2009-12-02
US20090247959A1 (en) 2009-10-01
JP2010503430A (ja) 2010-02-04
US8048037B2 (en) 2011-11-01
US20090247951A1 (en) 2009-10-01
US20140350484A1 (en) 2014-11-27
CN101588830A (zh) 2009-11-25
EP2076302A1 (fr) 2009-07-08
WO2008031237A1 (fr) 2008-03-20
DK3626289T3 (da) 2021-03-01
US10300211B2 (en) 2019-05-28
JP2010503432A (ja) 2010-02-04
CN101594897A (zh) 2009-12-02
JP4955772B2 (ja) 2012-06-20
EP3738626A1 (fr) 2020-11-18
CN101594898B (zh) 2012-10-03
JP2010503431A (ja) 2010-02-04
EP2066373A1 (fr) 2009-06-10
EP3626289B1 (fr) 2020-12-02
EP2076303A1 (fr) 2009-07-08
EP3626289A1 (fr) 2020-03-25
US20170043098A1 (en) 2017-02-16
EP3738626B1 (fr) 2022-08-10
US20190022332A1 (en) 2019-01-24
HUE060243T2 (hu) 2023-02-28
WO2008031236A1 (fr) 2008-03-20
WO2008031238A1 (fr) 2008-03-20
EP4159257A1 (fr) 2023-04-05
DE102007022791A1 (de) 2008-03-27
US20090254035A1 (en) 2009-10-08
US10350363B2 (en) 2019-07-16
PL3626289T3 (pl) 2021-06-14

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