Inertial blocking mechanism

E - Fixed Constructions – 05 – B

Patent

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Details

E05B 47/06 (2006.01) E05B 17/20 (2006.01) E05B 67/36 (2006.01)

Patent

CA 2648775

A mechanical device such as a lock with anti-shock arrangement, comprising a locking member adapted for linear motion. The anti-shock arrangement comprises a balancing member mounted for linear motion substantially parallel to the locking member motion and a pivotally supported lever with two ends and a pivoting axis therebetween. The locking member abuts one of the ends and the balancing member abuts the other end, the abutment being maintained by a biasing means such as a spring. The lever has substantially zero moment of inertia with respect to its pivoting axis. The locking member, for example an armature of a bi-stable solenoid, is held in a blocked position of the device by a permanent magnet. Upon a shock applied to the device, the locking member and the balancing member create inertial forces substantially balancing each other, while vibration forces are cancelled by the abutment arrangement and the permanent magnet.

L'invention concerne un dispositif mécanique, tel qu'un verrou pourvu d'un système antichoc, comprenant un élément de verrouillage adapté en vue d'un mouvement linéaire. Le système antichoc comprend un élément d'équilibrage monté en vue d'un mouvement linéaire sensiblement parallèle au mouvement de l'élément de verrouillage et un levier supporté pivotant comportant deux extrémités et un axe pivotant situé entre celles-ci. L'élément de verrouillage vient buter contre l'une de ces extrémités et l'élément d'équilibrage vient buter contre l'autre extrémité, l'appui en butée étant maintenu par un organe de sollicitation tel qu'un ressort. Le levier présente un moment d'inertie sensiblement nul par rapport à son axe de pivotement. L'élément de verrouillage, tel qu'une armature d'un solénoïde bistable, est maintenu dans une position de blocage du dispositif par un aimant permanent. Lorsque le dispositif subit un choc, l'élément de verrouillage et l'élément d'équilibrage créent des forces d'inertie se contrebalançant sensiblement l'une l'autre, les forces de vibration étant annulées par le système de butée et l'aimant permanent.

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