Abstract: A safety helmet is disclosed having a shell and a comfort liner coupled to the inner surface of the shell. The comfort liner is constrained to the front part and to the rear part of the shell, and the helmet has a webbing arranged between the shell and the comfort liner along the upper median portion of the comfort liner. The webbing has a front end constrained to the front part of the comfort liner and a rear end to move the webbing with respect to the shell and cause consequently the change of the overall dimensions of the comfort liner inside the helmet. The webbing is constrained, with respect to the shell, in an operative position corresponding to the overall dimensions of the comfort liner inside the helmet.

Abstract: A safety helmet is disclosed having a shell and a comfort liner coupled to the inner surface of the shell. The comfort liner is constrained to the front part and to the rear part of the shell, and the helmet has a webbing arranged between the shell and the comfort liner along the upper median portion of the comfort liner. The webbing has a front end constrained to the front part of the comfort liner and a rear end to move the webbing with respect to the shell and cause consequently the change of the overall dimensions of the comfort liner inside the helmet. The webbing is constrained, with respect to the shell, in an operative position corresponding to the overall dimensions of the comfort liner inside the helmet.

Abstract: A helmet is disclosed having a padding element removably constrained to the shell and provided with a first seat so that a first protrusion integral with the shell is reversibly engaged, reversible male-female coupling members to reversibly couple the shell and the padding element, which are adapted to define a hinge point for the relative rotation between the shell and the padding element. The helmet has restraining members to selectively restrain and release the first protrusion in and from the first seat. The restraining members are movable between a first restraint position to restrain the first protrusion in the first seat, so that the relative rotation between the shell and the padding element is prevented. A second disengagement position of the first protrusion from the first seat is also provided so that the relative rotation between the shell and the padding element is allowed.

Abstract: A helmet is disclosed having a padding element removably constrained to the shell and provided with a first seat so that a first protrusion integral with the shell is reversibly engaged, reversibly-coupling male-female means to reversibly male-female couple the shell and the padding element, which are adapted to define a hinge point for the relative rotation between the shell and the padding element. The helmet has restraining means to selectively restrain and release the first protrusion in and from the first seat. The restraining means are movable between a first restraint position to restrain the first protrusion in the first seat, so that the relative rotation between the shell and the padding element is prevented. A second disengagement position of the first protrusion from the first seat is also provided so that the relative rotation between the shell and the padding element is allowed.

Abstract: A method of controlling a switching converter and a related controller suitable for the switching converter allow to implement a burst-mode functioning without generating acoustic noise and with a relevantly reduced ripple of the regulated DC voltage or current provided in output to a supplied load. The method includes sensing the difference between the error signal and the burst-stop threshold at the beginning of a burst period. If the error signal has surpassed (either upwards or downwards) the burst-stop threshold, the method sets the switching stage in a high impedance state at a new active edge of a clock signal, keeps the switching stage in the high impedance state for an integer number of cycles of the clock signal, and re-enables the switching stage to switch the energy tank circuit up to the end of the burst period. The integer number is determined based on the difference between the error signal and the burst-stop threshold.

Abstract: A method of controlling a switching converter and a related controller suitable for the switching converter allow to implement a burst-mode functioning without generating acoustic noise and with a relevantly reduced ripple of the regulated DC voltage or current provided in output to a supplied load. The method includes sensing the difference between the error signal and the burst-stop threshold at the beginning of a burst period. If the error signal has surpassed (either upwards or downwards) the burst-stop threshold, the method sets the switching stage in a high impedance state at a new active edge of a clock signal, keeps the switching stage in the high impedance state for an integer number of cycles of the clock signal, and re-enables the switching stage to switch the energy tank circuit up to the end of the burst period.