A head utility system (20) comprising: a headset (22) comprising: a first power or data connector (28) for connecting to an off-headset power or data system (30); and a second power or data connector (38); the head utility system further comprising: headwear (24) for wearing over the headset, the headwear comprising: a headwear power or data connector (44) for connecting to the second power or data connector; wherein the second connector and the headwear connector are arranged to be releasably connected when the headwear is worn over the headset, such that power or data can be transferred between the headset and the headwear.

An adjustable helmet having first and second shells and a single actuator comprising at least one tooth, the single actuator being moveable between: a first locked position, wherein the at least one tooth retains the first and second shells and the first and second shells define a first hollow space; a released position, wherein the at least one tooth no longer retains the first and second shells such that one of the first and second shells is moveable relative to the other of the first and second shells; and a second locked position, wherein the at least one tooth retains the first and second shells and the first and second shells define a second hollow space, the second hollow space being different than the first hollow space.

An adjustable helmet having first and second shells and a single actuator comprising at least one tooth, the single actuator being moveable between: a first locked position, wherein the at least one tooth retains the first and second shells and the first and second shells define a first hollow space; a released position, wherein the at least one tooth no longer retains the first and second shells such that one of the first and second shells is moveable relative to the other of the first and second shells; and a second locked position, wherein the at least one tooth retains the first and second shells and the first and second shells define a second hollow space, the second hollow space being different than the first hollow space.

A collapsible protective helmet (10) comprises an impact-resistant base body (11) intended to encircle the head of a wearer and an impact-resistant crown (12) coupled to the base body by coupling means to be movable between a protective position in which the crown is supported by the base body in an orientation in which the crown covers the top of the head of the wearer and a stored position inverted relative to the protective position in which the crown is supported by, but nested in, the base body. The helmet further comprises releasable locking means for locking the base body (11) and crown (12) together in each of the two positions of the crown. The coupling means permits movement between those positions by pivotation of the crown relative to the base body in a direction away from the base body so as to no longer be supported by the base body rotation of the crown relative to the base body through substantially 180 degrees and pivotation of the crown relative to the base body in a direction towards the base body so as to again be supported by the base body.

A helmet having an outer liner with an inward-facing surface, an inner liner with an outward-facing surface that interfaces with the inward-facing surface of the outer liner, and a flexible tether coupling the outer liner to the inner. The inner liner is slidably coupled to the outer liner via a plurality of return springs, the plurality of return springs biasing the inner liner to a first position with respect to the outer liner.

A chin guard positioning assembly connects a helmet body and a chin guard to each other. The helmet body provides a certain space to allow a user's head to be inserted thereinto and the position of the chin guard is allowed to be moved from a protective position to an open position. The chin guard positioning assembly includes a movable base part in which a position thereof is moved together with the chin guard. A fixed base part is connected to the helmet body and connected to the movable base part to serve as a reference for the movement of the position of the movable base part. A fixed magnetic force part is fixed to the fixed base part. A movable magnetic force part is fixed to the movable base part to fix the movable base part to a first position or a second position.

A ballistic helmet comprising a ballistic shell, wherein within the thickness of the ballistic shell, or inside the ballistic shell, there is provided one or more circuit layers forming a circuit, which circuit comprises a power bus and a data bus, and wherein one or more power connections and one or more data connections are provided on the inside and/or on an edge of the ballistic shell for providing power and data to/from one or more electrical devices through the circuit.

A helmet can include a helmet body comprising an energy-absorbing layer and an outer shell disposed over the energy-absorbing layer. An electronic device can be integrated with the helmet body. A first electrical contact can be formed at an exterior of the outer shell and adapted to be in electrical communication with the electronic device. A helmet visor can be coupled to the helmet body with at least one visor arm, the helmet visor comprising controls integrated within the visor. A second electrical contact can be formed at an inner surface of the at least one visor arm and adapted to be in electrical communication with the controls integrated within the visor. The second electrical contact can be adapted to mateably couple with the first electrical contact such that the electronic device and the controls are adapted to be in electrical contact.

A helmet having an outer liner and an inner liner is disclosed. The inner liner is positioned at least partially inside the outer liner. The helmet includes at least one chin strap anchored to the outer liner and passing through an opening in the inner liner. The helmet further includes a plurality of return springs, each having a first end coupled to the outer liner, and a second end distal to the first end and coupled to the inner liner. The return springs bias the inner liner to a first position with respect to the outer liner. The inner liner is slidably coupled to the outer liner through the plurality of return springs and slidably movable relative to the outer liner between the first position and a second position where the inner liner and outer liner are rotated away from the first position.

A bicycle helmet that fits over a surface of a head of a user generally includes a segment of flexible cell structures that form a radial honeycomb matrix movable between a folded condition where each side of the segment is disposed generally parallel and an expanded condition where the radial honeycomb matrix of the segment is configured to be expanded at least partially over the head of the user and arranged radially relative to the surface of the head of the user. The bicycle helmet includes a first and second side frame disposed respectively at the first and second ends of the honeycomb matrix. A sliding latch permits selective translation of the first and second side frames.