MOTION-BLOCKING MECHANISM WITH PIEZOELECTRIC DRIVE Russian patent published in 2012 - IPC E05B65/46 A47B88/04 

FIELD: construction.

SUBSTANCE: unit comprises a lock mechanism and a guide. The guide comprises the first element and the second element installed as capable of relative displacement. The lock mechanism comprises the first locking element, the second locking element and a controlled driving mechanism. The first locking element comprises a movable lever installed on the first element of the guide, and has the first end directed towards the second element of the guide. The lever is installed as capable of displacement between the first position and at least one second position. The second locking element is installed on the second element of the guide and is forwarded to outside from the second element of the guide towards the first element of the guide. The controlled driving mechanism serves for linear displacement of a stem between its pulled-in and pulled-out positions. If there is no power supply, the controlled driving mechanism prevents displacement of the stem from the pulled-out position to the pulled-in position. If power supply is available, the controlled driving mechanism provides for displacement of the stem from the pulled-out position to the pulled-in position. When the stem is in the pulled-out position, the controlled driving mechanism is disconnected from power supply, and the lever is in the first position, pullout of the second element of the guide is prevented from the first element of the guide with the help of a stem, which prevents displacement of the lever into the position making it possible for the second stop element to pass by the first end of the lever. When power supply arrives to the controlled driving mechanism, the second element of the guide may be pulled out from the first element of the guide with the help of the second locking element, which provides for the lever an opportunity to move to the second position with the help of stem movement to pulled-in position. The proposed invention also relates to the locking mechanism and method of sliding mechanism locking.

EFFECT: group of inventions provides for possibility to resist high loads without disengagement, and also makes it possible to retain a locking mechanism in a blocked or closed position in case of power supply failure.

24 cl, 7 dwg