A door check mechanism providing an infinite number of stable retaining positions between fully opened and closed, said mechanism comprising:
- a guiding arm linked to a steady part, or linked to a moving part;
- and
- a mechanism linked to the opposite of the steady or moving part, in such a way that the guiding arm penetrates through the mechanism with a relative displacement between those two parts, the checking function being provided by a relative blocking of the guiding arm through said mechanism, wherein
- the guiding arm provides a rolling and relative blocking path between said guiding arm and said mechanism, whereas the surface of rolling path provides appropriate roughness to ensure the adherence of a braking roller to said guiding arm, the braking roller being configured to ensure a checking function, the surface of the rolling path may therefore enclose notches that will match the shape of a rolling surface of the braking roller, the braking roller being made of an elastic material;
- the mechanism includes a carriage device which comprises the braking roller mounted on an axle which can slide along lateral guiding slots, which are provided on the sides of said carriage device, whereas a braking element made of a brake shoe linked to carriage device will block the braking roller by a contact between its surface and the braking roller and whereas a spring device acting on said axle, while the load exerted on the guiding arm by the braking roller is counterbalanced by a roller mounted to the opposite of the braking roller, which holds the guiding arm, the mechanism ensuring the three functions hereafter:
- a) blocking of the rotation of the braking roller against guiding arm in any un-predefined position,
- b) release of the rotation of the braking roller whenever an opening or closing force greater than a predefined release threshold is exerted on the door, this release taking place within a limited clearance between the mechanism and the guiding arm,
- c) automatic re-locking, in any un-predefined position of the door, when the opening or closing force disappears;
- the lateral guiding slots, comprising bosses and notches, which resist the displacement of the axle, and which provide stable positions, during a locked phase and opening or closing maneuvers, the bosses and notches configured so during door opening or closing maneuvers, the axle tends to slide along lateral guiding slots in a direction opposite of the direction of the load, and after a limited clearance, the axle passes the bosses and reaches the notches, which releases the braking roller from the braking element, allowing its free rotation and therefore a relative displacement between the carriage device and the guiding arm;
- whereas the spring device exerts a compression load on the axle tending to bring it back to the locked position, as soon as the opening or closing maneuver is interrupted, the clearance of the door during this re-locking phase being limited by the size of lateral guiding slots.