The present disclosure includes a headgear for a helmet. The headgear includes a front band, a back band, and an intermediate band comprising a plurality of intermediate band parts arranged between the front band and the back band. The plurality of intermediate band parts comprises first pair of band parts having a circular shape, the band parts of the first pair of band parts extending from and connecting on a first side of the headgear, a second pair of band parts having a circular shape, the band parts of the second pair of band parts extending from and connecting on a second side of the headgear, a first cross band part intersecting with and extending from the connection of the first pair of band parts, and a second cross band part intersecting with and extending from the connection of the second pair of band parts.

A helmet, comprising: an outer shell; a head mount, configured to conform to the head of a wearer; and a plurality of connectors, each provided between the outer shell and the head mount and each connected to the outer shell and head mount; wherein the connectors are configured to suspend the head mount within the outer shell such that, in use, an air gap is provided between head mount and the outer shell; wherein the connectors each have a first connection point connected to the outer shell and a second connection point connected to the head mount; and at least one connector is configured such that, under tensile loading between the first and the second connection points, the connector extends with a first modulus of elasticity up to a threshold extension and extends with a second modulus of elasticity beyond the threshold extension.

A safety helmet with a helmet shell, with a bearing ring, with a rotatable actuating element (14) and with a transmission unit (15.1, 15.2). The transmission unit (15.1, 15.2) transmits a rotation of the actuating element to the bearing ring, so that the head size provided is changed. A helmet shell-side transmission piece (15.1) is non-rotatably connected to the actuating element (14) such that they rotate in unison, and a bearing ring-side transmission piece (15.2) is connected mechanically to the bearing ring. The helmet shell-side transmission piece (15.1) can move both relative to the actuating element (14) and relative to the bearing ring-side transmission piece (15.2) linearly in two opposite directions. The distance between the actuating element (14) and the bearing ring can be changed thereby.

A ratchet mechanism for a hard hat and method of assembling the same are provided. The ratchet mechanism includes a knob with knob protrusions. The ratchet mechanism also includes a ratchet gear. The ratchet gear includes teeth engagement mechanisms. Each teeth engagement mechanism includes a hooking mechanism and a tooth protrusion. Each hooking mechanism is configured to engage with the knob protrusions. The ratchet mechanism also includes a band housing configured to allow a band to ratchetably move within the housing. The band housing also includes a knob engagement protrusion and a ratchet gear aperture configured with one or more teeth defining a ramped surface. The ratchet gear is disposed on the knob engagement protrusion and includes one or more ratchet gear teeth configured to engage with a set of band teeth on the band, such that the rotation of the ratchet gear tightens or loosens the band during operation.

A fit system for a helmet can include an adjuster including a width adjustment track, and first and second pods moveably coupled to the width adjustment track with a first and second support arm, the second pod comprising a lateral offset from the first pod. The fit system can further include a dial moveably coupled to the adjustor, such that movement of the dial changes a size of the lateral offset between the first pod and the second pod. The fit system can further include a hanger flexibly coupled to both the first pod and the second pod and adapted to allow for adjustment of the lateral offset between the first pod and the second pod. The hanger can further be adapted to allow for movement of the first pod and the second pod in a direction substantially perpendicular to the lateral offset without movement of the dial.

The present application discloses a helmet retention system for securing a helmet to the head of a user. In certain versions, the helmet retention system comprises a rear portion connected the rear of the helmet, a chin portion configured to receive the chin of the user, a first side upper strap extending from the rear portion to the front of the helmet, a second side upper strap extending from the rear portion to the front of the helmet, a first side lower strap extending from the rear portion to the chin portion, a second side lower strap extending from the rear portion to the chin portion, and an adjustment device operably attached to the rear portion. The adjustment device is configured to selectively and simultaneously adjust the length of the first side upper strap and the second side upper strap between the rear portion and the front of the helmet and simultaneously adjust the length of the first side lower strap and the second side lower strap between the rear portion and the chin portion.

A protective helmet with an outer shell for distributing impact forces, with a head support ring for placing on a head of a wearer of the protective helmet, and with an adjustment device for adjusting a circumference of the head support ring in order to adapt the latter to the head of the wearer. The adjustment device is guided through an opening of the outer shell so as to be operated from outside the outer shell. The protective helmet is characterized in that the adjustment device is designed to tension a spring device, during the adjustment of the circumference, in such a way that the tension of the spring device acts to transfer the head support ring to a basic circumference.

A tactical helmet assembly has a helmet retention harness includes left and right straps that form a snapback adjustment assembly. The first strap has a first end with a helmet mounting feature mountable to a first lateral, interior side of a helmet. The first strap includes a second end having a first strap slot. The first strap presents snap stud(s) on a first surface. The snapback adjustment assembly includes a second strap having a first end inserted through the first strap slot of the first strap. the second strap includes a helmet mounting feature mountable to a second lateral, interior side of the helmet. The second strap includes a second end having a second strap slot through which the first end of the first strap is inserted. The second strap presents more than one eyelets longitudinally aligned to receive the snap stud(s) of the first strap.

Intelligent VR (Virtual Reality) elastic bandage equipment includes a main body, left and right supporting arms, a rear support, a telescopic assembly and a driving mechanism. According to a touch panel in the equipment, different input signals are triggered through different touch actions and touch durations, and a motor is controlled through a main control circuit board, so that the motor outputs different rotating speeds and directions; and therefore, the motor further drives the driving mechanism to drive the telescopic assembly to move and stretch, the telescopic assembly further drives the left and right supporting arms to retract, and adjustment of the distance between the main body and the head of a human body is achieved, so that the equipment is more comfortable to use, the use range is enlarged, and the operation is easy.

The disclosed strap adjustment devices may include a pinion gear, with a first rack secured to a first strap and a second rack secured to a second strap each engaged with the pinion gear. A rotatable cam element may include an angled radially outer surface that is at an angle to a circumference of the rotatable cam element. A bearing element may be positioned adjacent to the angled radially outer surface such that the bearing element jams between the angled radially outer surface and a braking surface when the rotatable cam element is rotated in a jamming direction. A spiral spring may be coupled to the pinion gear and the rotatable cam element to allow for an increase in length of the first and second straps upon application of a tension force to the first and second straps. Various other methods, systems, and devices are also disclosed.