A helmet may include an outer liner and an inner liner disposed inward from the outer liner, the inner liner comprising an inner surface with at least one hole. A fit belt may comprise at least one pin coupled to an inner surface of the inner liner with the at least one hole mateably coupled with the at least one pin. An elastomeric strap may comprise an inner end and an outer end opposite the inner end. The outer end of the elastomeric strap may be coupled to an inner surface of the outer liner. The outer end of the elastomeric strap may comprise a recess and a fastener that extends through the recess of the outer end of the elastomeric strap to couple the elastomeric strap to the outer liner. The inner end of the elastomeric strap may be coupled to the fit belt.

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.

There is provided a helmet with at least an inner liner forming a body of the helmet, the inner liner having a concave inner surface defining a cavity configured for receiving a wearer's head. The helmet has a plurality of slippage pads disposed at selected locations on the concave inner surface and connected to the inner liner. The slippage pads have an elongated shape with its length greater than its width. Each slippage pad defines a number of integrally connected side-by-side tubes each having an opening adapted to be oriented toward the wearer's head. The openings are aligned longitudinally along the length of the slippage pads. The helmet also has an attachment system to attach the helmet to the wearer's head.

A system for preventing insects from entering the vent openings of bicycle helmets including a preferably elastic shell-shaped covering of an open mesh material wherein the mesh openings are sized to prevent insects from passing through such that when the covering or barrier is mounted over or in the helmet, the desired insect prevention is achieved.

A cycling helmet capable of switching a sound production guidance mode based on a bone conduction earphone includes: a helmet body and the bone conduction earphone disposed on the helmet body. The bone conduction earphone includes a magnet, a coil and a bone conduction oscillator, and the bone conduction oscillator can contact the helmet body, so as to cause the helmet body to oscillate to form a sound cavity.

An impact attenuating helmet including an outer liner having an inner mating surface, an inner liner positioned under the outer liner and having an outer mating surface configured to be received by the inner mating surface of the outer liner, the inner liner and the outer liner being configured to move relative to each other along a slip plane between outer mating surface of the inner liner and the inner mating surface of the outer liner, and one or more securing attachments, each securing attachment being coupled to the outer liner and being configured to secure the outer liner to the inner liner, each securing attachment comprising a slack element configured to permit a range of movement between the outer liner and the inner liner.

A helmet for a head of a user with a liner with an outer shell and an energy management layer having an inner surface and a lower edge surrounding the inner surface at a helmet opening, at least two coupling points located on the inner surface proximal to the lower edge, at least one flexible forehead strap following the lower edge of the energy management layer and inwardly offset from the inner surface, at least two prongs comprising a stem and a head, the head having a larger cross-section than a cross-section of the stem, wherein the stem is attached to and projects away from the flexible forehead strap towards the inner surface and the head couples with the inner surface at one of the at least two coupling points, a continuous gap between the inner surface and the flexible forehead strap extending around an entirety of the lower edge.

A camera system includes a motorcycle helmet having an energy-absorbing inner liner, an outer shell surrounding at least a portion of the energy-absorbing inner liner, and a number of pockets in the motorcycle helmet. Each pocket includes an opening in the outer shell and a recess in the energy-absorbing liner. The camera system also includes a number of cameras in the pockets in the motorcycle helmet, and each camera includes a lens, an image sensor, and a processor. The camera system also includes a number of lens covers covering the cameras, and each lens cover is conformal with a portion of the outer shell proximate to the lens cover such that the cameras and the lens covers do not appreciably increase the aerodynamic drag of the motorcycle helmet.

A safety helmet includes a shell, a flexible frame attached to the shell from inside, and a slide-facilitating member attached to the flexible frame from inside. In virtue of the slide-facilitating member, the shell when receiving incoming impact can slide with respect to a head of a user wearing it, so that the safety helmet can absorb and convert energy of the incoming impact force into other forms of energy, thereby enhancing protection to the user's head.

The present invention discloses a method for interlocking a shared bicycle and an intelligent safety helmet, and the method comprises the following steps: (1) providing an electronic frame lock and an intelligent safety helmet for using cooperatively on a shared bicycle respectively, interlocking both of them when the shared bicycle is parked; (2) checking the current state information of an electric lock and a safety helmet lock simultaneously when a user uses the mobile intelligent terminal to scan the shared bicycle; (3) unlocking of the electric lock and the safety helmet lock when the verification is passed; (4) wearing an intelligent safety helmet before using the bicycle; (5) beginning to record the trip information by the intelligent helmet after the user puts on the intelligent safety helmet; (6) stopping the voice broadcast function and terminating the recording of the trip information when the state information of the electronic frame lock and the safety helmet lock which is checked shows that the electronic frame lock and the safety helmet lock are locked, after the user terminates the using of the bike. The invention also discloses an interlocking device for a shared bicycle and an intelligent safety helmet implementing the above-mentioned method, which makes that the bicycle and the intelligent safety helmet are always in a state that they are used in cooperation with each other.