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Pharmaceutical injection device

  • US 10,159,799 B2
  • Filed: 07/25/2017
  • Issued: 12/25/2018
  • Est. Priority Date: 09/12/2011
  • Status: Active Grant
First Claim
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1. A pharmaceutical injection device, comprising:

  • a main body case that has an opening through which an injection needle is inserted and retracted;

    a pharmaceutical syringe mounting portion that is provided inside the main body case and to which a pharmaceutical syringe is removably mounted;

    a piston that is provided movably with respect to the pharmaceutical syringe mounted to the pharmaceutical syringe mounting portion;

    a drive mechanism configured to drive the piston, the drive mechanism including a piston drive motor configured to drive the piston;

    a controller that is electrically connected to the drive mechanism;

    a display section that is connected to the controller;

    a power button that is provided to a periphery of the main body case; and

    a remaining pharmaceutical sensor that is connected to the controller and configured to sense the amount of pharmaceutical remaining in the pharmaceutical syringe from the amount of movement of the piston,wherein, when the presence of a pharmaceutical is detected by the remaining pharmaceutical sensor;

    the controller causes the display section to display a warning recommending removal of the pharmaceutical syringe from the pharmaceutical syringe mounting portion for storing the pharmaceutical syringe, andthe power for the device will not turn off even if the power button is pressed when the device is in a state in which the pharmaceutical syringe has not been removed from the pharmaceutical syringe mounting portion.

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