Injection device with mode locking means
First Claim
1. An injection device comprising:
- a housing,a dose setting member being rotationally operable to set a desired dose,a piston rod adapted to cooperate with a piston to cause a set dose to be expelled from the injection device,a mode locking member rotationally locked to the housing and movable between a first extreme position during dose setting, and a second extreme position during injection,an injection button operable by pushing to cause the piston rod to cooperate with the piston to cause a set dose to be expelled from the injection device, the injection button being operatively connected to the mode locking member in such a manner that when the injection button is operated by pushing to cause a set dose to be expelled from the injection device, the mode locking member is automatically moved from the first extreme position to the second extreme position,wherein during dose setting the mode locking member in the first extreme position prevents the piston rod from cooperating with the piston by locking the piston rod,wherein during injection the mode locking member in the second extreme position prevents the dose setting member from performing rotational movement and being operated to set a dose.
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Abstract
An injection device having a housing, a dose setting member being operable to set a desired dose, a piston rod adapted to cooperate with a piston to cause a set dose to be expelled, and a mode locking member. The mode locking member is adapted to be in a first extreme position and in a second extreme position. When the mode locking member is in the first extreme position the piston rod is prevented from cooperating with the piston, and when the mode locking member is in the second extreme position the dose setting member is prevented from being operated to set a dose. The mode locking member is adapted to be in the first extreme position during dose setting and the second extreme position during injection of a set dose.
320 Citations
22 Claims
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1. An injection device comprising:
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a housing, a dose setting member being rotationally operable to set a desired dose, a piston rod adapted to cooperate with a piston to cause a set dose to be expelled from the injection device, a mode locking member rotationally locked to the housing and movable between a first extreme position during dose setting, and a second extreme position during injection, an injection button operable by pushing to cause the piston rod to cooperate with the piston to cause a set dose to be expelled from the injection device, the injection button being operatively connected to the mode locking member in such a manner that when the injection button is operated by pushing to cause a set dose to be expelled from the injection device, the mode locking member is automatically moved from the first extreme position to the second extreme position, wherein during dose setting the mode locking member in the first extreme position prevents the piston rod from cooperating with the piston by locking the piston rod, wherein during injection the mode locking member in the second extreme position prevents the dose setting member from performing rotational movement and being operated to set a dose. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. An injection device comprising:
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a housing, a dose setting member being operable to set a desired dose, a piston rod adapted to cooperate with a piston to cause a set dose to be expelled from the injection device, a mode locking member rotationally locked to the housing and movable between a first extreme position during dose setting, and a second extreme position during injection, an injection button operable by pushing to cause the piston rod to cooperate with the piston to cause a set dose to be expelled from the injection device, the injection button being operatively connected to the mode locking member in such a manner that when the injection button is operated by pushing to cause a set dose to be expelled from the injection device, the mode locking member is automatically moved from the first extreme position to the second extreme position, wherein during dose setting the mode locking member in the first extreme position prevents the piston rod from cooperating with the piston by locking the piston rod, wherein the mode locking member (8) and dose setting member (3) are each provided with a set of teeth (11,
12), andthe teeth (11,
12) from the dose setting member and mode locking member engage when the mode locking member is in the second extreme position during injection of a set dose. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22)
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Specification