The present invention relates to the technical field of massagers and provides a head massager and a helmet size adjusting structure thereof. The helmet size adjusting structure includes two racks and an adjusting apparatus, the adjusting apparatus includes a revolving shaft and a gear, an upper part and a lower part of the gear are separately engaged with the racks, and a knob component and a locking component are disposed on the revolving shaft; and the structure further includes two tension springs, where front ends of the tension springs are fastened on a rear housing and rear ends of the tension springs are separately fastened on the two racks; the knob component includes a knob outer ring, a knob shell, and a gear stand; the locking component includes a knob lock, an upper cover of the knob lock, and an elastic element; the gear stand is located inside the knob lock, a unidirectional gear ring is disposed on the gear stand, a lock that can be clamped on the unidirectional gear ring is disposed on the knob lock, and the elastic element is disposed on the upper cover of the knob lock; and teeth are further disposed on the gear stand, where the teeth are engaged with the gear. In the present invention, a knob and a button are designed as a whole and helmet adjustment is implemented by using two manners, its operation is more convenient, and an inner structure is more reliable.

The present application provides a headband arrangement for a welding helmet, comprising: a fixed attachment structure; and a helmet mounting structure cooperating with the attachment structure, wherein at least two stopping positions are defined longitudinally between the attachment structure and the helmet mounting structure, the helmet mounting structure is selectively switchable between an unlocking state and a locking state, wherein in the unlocking state, the helmet mounting structure is slidable between the stopping positions relative to the attachment structure, and wherein in the locking state, the helmet mounting structure can be locked to one of the stopping positions relative to the attachment structure and can be kept there by a magnetic force generated between a pair of magnetic parts.

A helmet for protecting a head of a wearer, such as a hockey, lacrosse, football or other sports player. The helmet includes an outer shell and an inner padding disposed between the outer shell and the wearer's head when the helmet is worn. The inner padding includes a plurality of shock absorbers and an interconnector interconnecting the shock absorbers, each shock absorber being deformable in response to a rotational impact on the helmet such that an outer part of the shock absorber moves relative to an inner part of the shock absorber in a direction tangential to an angular movement of the outer shell due to the rotational impact.

The present disclosure relates to a variable helmet that can be unfolded flat and carried or kept when not in use. A configuration of the variable helmet is characterized by including a protective pad in which a plurality of unit pads are planarly coupled like a mosaic so that the protective pad is in a hemispherical shape to cover and protect a head of a wearer and is able to be unfolded flat like a plate, the protective pad having unevenness portions provided in a sawtooth shape at both ends thereof; both-end fixing means allowing the unit pads to have a hemispherical shape by tightening the both ends of the protective pad; and a chin strap allowing the protective pad to be fixed in a state in which the protective pad is covered on the head.

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.

A personal protection system for providing a sterile barrier around medical/surgical personnel. The system includes a helmet over which a hood or a toga suspended. A microphone, an amplifier and a speaker are mounted to the helmet. Speech of the individual wearing the personal protection system is picked up by the microphone and amplified speech is broadcast by the speaker. The speaker is outwardly directed so as to broadcast the speech out through the hood or toga covering the helmet.

A helmet can include an upper body comprising an interior surface comprising a locking flange, and a lower body positioned at least partially inside the upper body. The lower body can comprise an edge in contact with the locking flange of the upper body. At least one joining pin can be located within, and bridge, the lower body and the upper body. An at least one basket pair can comprise an upper basket comprising a pin receiver, the upper basket being at least partially embedded within the upper body. A lower basket can comprise a pin aperture, the lower basket being at least partially embedded within the lower body and positioned such that the pin aperture is aligned with the pin receiver of the basket pair. The at least one joining pin can be positioned inside both the pin aperture and the pin receiver of the basket pair.

A helmet can include an upper body comprising an interior surface comprising a locking flange, and a lower body positioned at least partially inside the upper body. The lower body can comprise an edge in contact with the locking flange of the upper body. At least one joining pin can be located within, and bridge, the lower body and the upper body. An at least one basket pair can comprise an upper basket comprising a pin receiver, the upper basket being at least partially embedded within the upper body. A lower basket can comprise a pin aperture, the lower basket being at least partially embedded within the lower body and positioned such that the pin aperture is aligned with the pin receiver of the basket pair. The at least one joining pin can be positioned inside both the pin aperture and the pin receiver of the basket pair.

A collapsible helmet including a shell having two or more components which are hingedly connected together about fold lines extending across the shell. Each component includes a plurality of panels with each panel being hingedly connected to at least one adjacent panel. The shell may be adjustable between a first configuration in which the helmet may be placed over the head of the user and a second configuration in which the components are flattened and are arranged in a substantially overlying relationship.

A rider safety compliance system comprising: a personal transport upon which a user can be transported, a physical lock mechanism securely mounted on the personal transport and mechanically adapted to lock and secure a helmet, and a processor adapted to release the helmet from the physical lock mechanism as a predetermined action for allowing the user to activate the personal transport.