# US 2014/0155834 A1 · Locking Interface, Cartridge Holder and Drug Delivery Device Comprising a Locking Interface > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2014/0155834 A1 - Document ID: US20140155834A1 - Status: Published application - Kind: A1 - Application number: 14/232,818 - Filed: 2012-07-12 - Published: 2014-06-05 - Earliest claimed: 2011-07-15 - Inventors: Michael Harms; Tobias Stever; Christiane Schneider; Meinolf Werner; Olaf Zeckai - Web page: https://patentgrep.com/patent/US20140155834A1 ## CPC - A61M 5/24: Ampoule syringes, i.e. syringes with needle for use in combination with replaceable ampoules or cartridges, e.g. automatic - A61M 5/315: Pistons; Piston-rods; Guiding, blocking or restricting the movement of the rod {or piston}; Appliances on the rod for facilitating dosing {; Dosing mechanisms} - A61M 2205/60: with identification means - Y10T 403/591: having operating mechanism - A61M: DEVICES FOR INTRODUCING MEDIA INTO, OR ONTO, THE BODY (introducing media into or onto the bodies of animals A61D7/00; means for inserting tampons A61F13/26; devices for administering food or medicines orally A61J; containers for collecting, storing or administering blood or medical fluids A61J1/05); DEVICES FOR TRANSDUCING BODY MEDIA OR FOR TAKING MEDIA FROM THE BODY (surgery A61B; chemical aspects of surgical articles A61L); DEVICES FOR PRODUCING OR ENDING SLEEP OR STUPOR {(Electrotherapy, e.g. producing anaesthesia by the use of alternating or intermittent currents A61N1/36021)} - Y10T: TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION ## Abstract A locking interface for locking a cartridge holder onto a main body of a drug delivery device comprises a locking member for locking the cartridge holder onto the main body, a user interface operable by a user, a support member, on which the locking member and the user interface are located, wherein the locking interface is configured such that a force needed for unlocking the cartridge holder and the main body is reducible by operating the user interface. ## Claims ### Claim at position 1 1-15. (canceled) ### Claim 16 A locking interface for locking a cartridge holder onto a main body of a drug delivery device, the locking interface comprising: a locking member for locking the cartridge holder onto the main body, a user interface operable by a user, a support member, on which the locking member and the user interface are located, wherein the locking interface is configured such that a force needed for unlocking the cartridge holder from the main body is reducible by operating the user interface. ### Claim 17 (depends on 16) The locking interface of claim 16, comprising a base, wherein the support member is resiliently connected to the base. ### Claim 18 (depends on 17) The locking interface of claim 17, wherein the support member is resiliently connected to the base in a hinge region. ### Claim 19 (depends on 17) The locking interface of claim 17, wherein the resilient connection is facilitated by at least one cut-out in the base. ### Claim 20 (depends on 19) The locking interface of claim 19, wherein the cut-out encircles the support member except from the hinge region. ### Claim 21 (depends on 17) The locking interface of claim 17, configured such that by operating the user interface the support member deflects relative to the base. ### Claim 22 (depends on 16) The locking interface of claim 16, wherein the user interface comprises at least one tactile member. ### Claim 23 (depends on 22) The locking interface of claim 22, wherein the tactile member comprises at least one of a rib, a knob or a rippled surface. ### Claim 24 (depends on 17) The locking interface of claim 17, wherein the user interface and the locking member are located such on the support member that, when the user interface is operated, the locking member and the user interface deflect in the same amount relative to the base. ### Claim 25 (depends on 17) The locking interface of claim 17, wherein the base extends along a longitudinal axis and wherein the support member and the user interface are located in an offset along the longitudinal axis. ### Claim 26 (depends on 16) A cartridge holder attachable to a main body of a drug delivery device, wherein the cartridge holder comprises the locking interface of claim 16. ### Claim 27 (depends on 26) The cartridge holder of claim 26, configured to be attachable to the main body by a revolving movement of the cartridge holder or the main body. ### Claim 28 (depends on 16) A drug delivery device comprising a cartridge holder, a main body and a locking interface of claim 16, wherein the cartridge holder is attachable to the main body and lockable to the main body by the locking member. ### Claim 29 (depends on 28) The drug delivery device of claim 28 being configured as a reusable device. ### Claim 30 (depends on 28) The drug delivery device of claims 28, wherein the cartridge holder is attachable to the main body by a revolving movement of one of the cartridge holder and the main body, lockable to the main body by the locking member and configured such that a torque needed for unlocking the cartridge holder is reducible by operating the user interface.