Needle protection device with a blocked protection position
First Claim
Patent Images
1. A needle guard device for or on an injection device, the needle guard device comprising:
- a) an injection needle extending along a longitudinal axis of the needle guard device,b) a needle holder which is attached to or can be attached to the injection device, from which the injection needle extends in a distal direction,c) a spring element,d) a needle guard element, which can be moved by an external force against a spring force of the spring element from a distal initial position, in which it surrounds the injection needle to beyond a needle tip, in the proximal direction by a releasing stroke as far as a releasing position exposing the injection needle and out of the releasing position in the distal direction as far as a guard position in which it surrounds the injection needle and the needle tip,e) a lock mechanism, which locks the needle guard element in a locked connection in the guard position to prevent a movement in the proximal direction, andf) a locking member arranged in an interior of the lock mechanism, wherein the locking member is axially movable relative to the lock mechanism upon establishing an engagement with the needle guard element, said engagement established as the needle guard element moves, relative to the lock mechanism and the locking member, into a triggering position disposed between the initial position and the releasing position, whereing) upon reaching the triggering position, the engagement is established by a locating element of the needle guard element moving into a driving connection with a complementary locating element of the locking member, whereinh) in the driving connection, the needle guard element slaves the locking member in the distal direction, and due to the spring force returning the needle guard element engaged with the locking member from the triggering position to the guard position, the locked connection is established by the locating element of the needle guard element abutting a lock stop of the lock mechanism, the abutting contact preventing the needle guard element from moving in the proximal direction.
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Abstract
A needle protection device for use with an injection device, the needle protection device including a moveable needle protection element which moves through a release course of movement into a locking engagement position as a result of an elastic force, the locking engagement position being achieved when the needle protection element moves from a starting position to a triggering position, when the needle protection element moves over a small portion of the release course, and being maintained when the needle protection element is no longer subjected to an external force in the triggering position.
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Citations
17 Claims
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1. A needle guard device for or on an injection device, the needle guard device comprising:
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a) an injection needle extending along a longitudinal axis of the needle guard device, b) a needle holder which is attached to or can be attached to the injection device, from which the injection needle extends in a distal direction, c) a spring element, d) a needle guard element, which can be moved by an external force against a spring force of the spring element from a distal initial position, in which it surrounds the injection needle to beyond a needle tip, in the proximal direction by a releasing stroke as far as a releasing position exposing the injection needle and out of the releasing position in the distal direction as far as a guard position in which it surrounds the injection needle and the needle tip, e) a lock mechanism, which locks the needle guard element in a locked connection in the guard position to prevent a movement in the proximal direction, and f) a locking member arranged in an interior of the lock mechanism, wherein the locking member is axially movable relative to the lock mechanism upon establishing an engagement with the needle guard element, said engagement established as the needle guard element moves, relative to the lock mechanism and the locking member, into a triggering position disposed between the initial position and the releasing position, wherein g) upon reaching the triggering position, the engagement is established by a locating element of the needle guard element moving into a driving connection with a complementary locating element of the locking member, wherein h) in the driving connection, the needle guard element slaves the locking member in the distal direction, and due to the spring force returning the needle guard element engaged with the locking member from the triggering position to the guard position, the locked connection is established by the locating element of the needle guard element abutting a lock stop of the lock mechanism, the abutting contact preventing the needle guard element from moving in the proximal direction. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A needle guard device for or on an injection device, the needle guard device comprising:
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a) an injection needle extending along a longitudinal axis of the needle guard device, b) a needle holder which is attached to or can be attached to the injection device, from which the injection needle extends in a distal direction, c) a spring element, d) a needle guard element, which can be moved by an external force against a spring force of the spring element from the distal initial position, in which it surrounds the injection needle to beyond a needle tip, in the proximal direction by a releasing stroke as far as a releasing position exposing the injection needle and out of the releasing position in the distal direction as far as a guard position in which it surrounds the injection needle and the needle tip, e) a lock mechanism, which locks the needle guard element in a locked connection in the guard position to prevent a movement in the proximal direction, and f) a locking member arranged in an interior of the lock mechanism, wherein in the distal initial position of the needle guard element, the spring force urges the needle guard element into an abutting engagement with the locking member, and the locking member axially moves relative to the lock mechanism via a force from the spring element when the needle guard element acts in the proximal direction from the distal initial position to a triggering position disposed between the initial position and the releasing position, wherein g) the needle guard element moves into the locked connection due to the needle guard element passing through a passage on the locking member to effect a release of the abutting engagement between the needle guard element and the locking member, such that the spring force moves the needle guard element from the triggering position to the guard position. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
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Specification