This refers to a retention mechanism (18) to control the translation between two components (2, 7) in a longitudinal direction (P, d), the retention mechanism (18) comprising an Elastic arm (2.1) in one of the components (2, 7) and a member of ramp rhombic (7.1 (7) in the other Component, the Elastic Beam (2).1) that is essentially Straight when he relaxes and has a First Rocker Head (2.2) and willing to interact in a coupling respectively with one of the two inclined ramps (7.2, 7.3), each ramp on one longitudinal side of the ramp Member Diamond (7.1) so that the application of a Force transfer between the components (2, 7) in a longitudinal direction (P, d) with the first Rocker Head (2.2) on one of the ramps (7.2, 7.3) in a First State (A, c) deflects the beam Elastic (2.1) in a Transverse direction (or i) when a Predetermined value of the driving force, depending on The Elasticity of the Elastic Beam (2.1) is to allow the first Rocker Head (2.2) travel along one side of the ramp romboi transverse Member Dal (7.1) on continuous Translational Components (2, 7), which allows the Elastic Beam (2.1) to relax when the first Head Rocker (2.2) has reached the other ramps (7.3, 7.2) in a Second State (C, a), where the application of a Force transfer between the components (2, 7) in the longitudinal direction (D, p) with the first Rocker Head (2.2) coupled to the other of the ramps (7.1, 7.2) deflects the beam Elastic (2.1) in the transverse direction (I, o) when a Predetermined value of the driving force, at least that depends on The Elasticity of the Elastic Beam (2.1) is to allow the first Rocker Head (2.2) travel along the other side of the ramp transverse Member Rhombic (7.1) in Translation on continuous Components (2, 7).La presente se refiere a un mecanismo de retención (18) para controlar la traslación entre dos componentes (2, 7) en una dirección longitudinal (P, D), el mecanismo de retención (18) que comprende un balancín elástico (2.1) en uno de los componentes
