Hard hat having an articulated cheek plate
A hard hat worn by an individual includes a crown and a visor to protect a region of a face of the individual. A cheek plate is movable between a retracted position and a protective position in which the cheek plate is arranged at least partially around the visor. An articulation system articulates the cheek plate with respect to the crown. The articulation system guides movement of the cheek plate, and includes a clamp to clamp the cheek plate against the visor when the cheek plate is close to or in the protective position.
1. A safety helmet adapted to be worn by an individual, comprising:
a shell configured to receive a skull of the individual;
a shield adapted to protect an area of the face of the individual;
a chin guard adapted to be moved between a withdrawal position and a protection position, wherein when worn and in the protection position, the chin guard is configured to be at least partially disposed around the shield so as to extend an area of protection of the face of the individual by the helmet;
an articulation system for articulating the chin guard relative to the shell, comprising means for guiding a displacement of the chin guard between the withdrawal position and the protection position,
wherein the articulation system further comprises pressing means adapted to press the chin guard against the shield when the chin guard is proximate and in the protection position;
wherein the means for guiding the articulation system comprise a guide slot and wherein the chin guard comprises a guide pin adapted to slide inside the guide slot to guide a controlled displacement of the chin guard between the withdrawal and protection positions;
wherein the guide slot comprises:
a first portion adapted to guide a sliding of the chin guard between the withdrawal position and a first intermediate position,
a second portion adapted to guide a switching of the chin guard between the first intermediate position and a second intermediate position, wherein in the second intermediate position, the chin guard is at least partially positioned around the shield and at a distance from the shield, and
a third portion adapted to guide a pressing of the chin guard against the shield between the second intermediate position and the protection position; and
wherein the articulation system comprises an additional guide slot having dimensions similar to dimensions of the first portion of the guide slot, the additional guide slot extending substantially in a longitudinal direction of the helmet and being aligned with the third portion of the guide slot at a distance from the third portion of the guide slot, and wherein the chin guard comprises an additional guide pin adapted to slide inside the additional guide slot when the chin guard is moved between the withdrawal and protection positions.
2. The safety helmet according to claim 1 , wherein the pressing means of the articulation system comprise a spring adapted to exert on the chin guard a restoring force tending to press the chin guard against the shield when the chin guard is proximate or in the protection position.
3. The safety helmet according to claim 1 , wherein the guide slot has substantially a shape of a cane, the first portion and the third portion of the guide slot being disposed at a distance from each other and extending substantially in a longitudinal direction of the helmet, and the second portion of the guide slot being curved and connecting the first portion and the third portion of the guide slot.
4. The safety helmet according to claim 1 , wherein:
the first portion of the guide slot comprises a rear end adapted to form an abutment for the guide pin when the chin guard is in the withdrawal position, and the third portion of the guide slot comprises a rear end adapted to form an abutment for the guide pin when the chin guard is in the protection position, and wherein
the additional guide slot comprises a rear end adapted to form an abutment for the additional guide pin when the chin guard is in the withdrawal position, and a front end adapted to form an abutment for the additional guide pin during switching of the chin guard between the first intermediate position and the second intermediate position, the switching of the chin guard taking place around the additional guide pin.
5. The safety helmet according to claim 1 , wherein the means for guiding the articulation system further comprise a connecting rod adapted to be added and fixed onto the guide pin and onto the additional guide pin, wherein the connecting rod is adapted to bias the pressing means during a displacement of the chin guard between the first intermediate position and the second intermediate position.
6. The safety helmet according to claim 1 , wherein the shield is adapted to be moved between a lowered position in which the shield protects part of the face of the individual wearing the helmet, and a raised position in which the shield is obscured to expose the face of the individual wearing the helmet.
7. The safety helmet according to claim 6 , wherein the articulation system for articulating the chin guard relative to the shell is adapted to allow a controlled displacement of the chin guard between the protection position and the withdrawal position independently of a displacement of the shield between the lowered position and the raised position.