Latch unit and assembly, and method of operating a latch unit

E - Fixed Constructions – 05 – B

Patent

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Details

E05B 63/18 (2006.01) E05B 55/00 (2006.01) E05B 65/10 (2006.01) E05C 1/14 (2006.01)

Patent

CA 2260198

The invention relates to a latch unit (10; 210) which includes a bolt (16; 116; 216; 316; 416), a housing (12; 212; 412) for the bolt, guide means (14) for the bolt in the housing, first resilient bias means (20; 120; 420) for the bolt in the housing, the first resilient bias means urging the bolt in a forwards direction towards a holding position in which an end part (22; 222) of the bolt is outside the housing, and retaining means (56, 60; 156, 160; 456, 460) for the bolt, the retaining means comprising a first part (56; 156; 456) and a second part (60; 160; 460), the retaining means having an active condition in which the first part is engaged with the second part whereby to retain the bolt against movement in the said forwards direction, characterised by a second resilient bias means (58; 458) to hold the first and second parts in the active condition. It is a particular feature of the invention the bolt has {i} a holding position in which it can engage a keeper, {ii} a non-holding position in which it is disengaged from the keeper, and {iii} a retained position in which it cannot engage the keeper and in which it is retained by the retaining means (56, 60; 156, 160; 456, 460), the non-holding position being between the holding and retained positions. There is also provided a method of operating a latch unit (10) according as herein defined.

La présente invention porte sur un verrou (10; 210) comprenant un pêne (16; 116; 216; 316; 416), un boîtier (12; 212; 412) contenant le pêne, des moyens de guidage (14) du pêne logé dans le boîtier, des premiers moyens élastiques de sollicitation (20; 120; 420) du pêne logé dans le boîtier, lesdit premiers moyens élastiques sollicitant le pêne vers l'avant pour l'amener à une position de blocage dans laquelle une partie terminale (22; 222) du pêne se trouve hors du boîtier. Le verrou comprend aussi des moyens de retenue (56, 60; 156, 160; 456, 460) du pêne, comportant une première partie (56; 156; 456) et une deuxième partie (60; 160; 460). Lorsque les moyens de retenue sont à l'état actif, la première partie entre en contact avec la deuxième partie pour retenir le pêne et l'empêcher de se déplacer vers l'avant, un deuxième moyen élastique de sollicitation (58; 458) maintenant les première et deuxième parties dans ledit état actif. Un aspect particulier de l'invention est que le pêne adopte {i} une position de blocage dans laquelle il s'engage dans un auberon, {ii} une position libre dans laquelle il est libéré de l'auberon, et {iii} une position de retenue dans laquelle il ne peut pas s'engager dans l'auberon, étant bloqué par les moyens de retenue (56, 60; 156, 160; 456, 460), la position libre se situant entre la position de blocage et la position de retenue. L'invention porte en outre sur un mode de fonctionnement d'un verrou (10) tel que décrit.

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