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 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 safety helmet (100) includes an arched helmet shell (7), a front holding element (2) attached to the helmet shell (7) and a curved front bearing element (5). The front bearing element lies flat against the forehead of a user of the safety helmet (100). A rigid intermediate piece (1) bridges a distance between the front holding element (2) and the front bearing element (5). This intermediate piece (1) is mechanically connected to the front holding element (2) and to the front bearing element (5), wherein at least one connection is detachable. The present invention pertains, furthermore, to two arrangements with such a safety helmet and with two alternative intermediate pieces or with two alternative front bearing elements with a respective intermediate piece.

A safety helmet (100) includes an arched helmet shell (2), an arched shock-absorbing shell (1), a holding ring (3, 11) and a resilient element (14). The holding ring (3, 11) is permanently connected to the helmet shell (2). The shock-absorbing shell (1) adjoins a holding ring edge. The resilient element (14) is supported at the holding ring (3, 11), projects over the holding ring edge and acts to move the shock-absorbing shell (1) away from the holding ring (3, 11) and to press shock-absorbing shell (1) against the helmet shell (2). A process for manufacturing such a safety helmet (100) is provided. According to the process, first the shock-absorbing shell (1) is placed first into the helmet shell (2) and the holding ring (3, 11) is then attached to the helmet shell (2).

A safety helmet (100) includes a helmet shell (7), with a bearing support structure (2, 5, 9, 21), with a helmet-side coupling point and with a module adapter (1). The bearing support structure (2, 5, 9, 21) is fastened to the helmet shell (7) on an inside. A helmet-side adapter coupling point of the module adapter (1) can be connected detachably to the safety helmet-side adapter coupling point of the module adapter (1). The module adapter (1) holds a module at the safety helmet (100). A process for fastening a module detachably to a safety helmet (100).

A safety helmet (100) includes a helmet shell (7), with a bearing support structure (2, 5, 9, 21), with a helmet-side coupling point and with a module adapter (1). The bearing support structure (2, 5, 9, 21) is fastened to the helmet shell (7) on an inside. A helmet-side adapter coupling point of the module adapter (1) can be connected detachably to the safety helmet-side adapter coupling point of the module adapter (1). The module adapter (1) holds a module at the safety helmet (100). A process for fastening a module detachably to a safety helmet (100).

A safety helmet (100) with a helmet shell (7), with a bearing element (5), with at least one holding element (2, 9.l, 9.r, 28) and with a tubular shape textile sheathing. Each holding element (2, 9.l, 9.r, 28) is permanently connected to the helmet shell (7). A distance is present between a holding element (2, 9.l, 9.r, 28) and the head of a user of the safety helmet (100). The bearing element (5) is adjacent to the head. The textile sheathing encloses the bearing element (5) and is located in some areas between the bearing element (5) and the head. The bearing element (5) is detachably connectable to a respective holding element through at least one connection opening in the textile sheathing. A process for removing the textile sheathing from the safety helmet (100), as well as to a process for manufacturing a safety helmet (100) are provided.

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 helmet (10) comprises an outer shell (12), an inner lining (14), and at least one releasable connector arrangement adapted to enable the outer shell (12) to be removably attached to the inner lining (14). The releasable connector arrangement includes a connecting stem (28) on the outer shell (12), and a receiving channel (30) in the inner lining (14).

A helmet (10) comprises an outer shell (12), an inner lining (14), and at least one releasable connector arrangement adapted to enable the outer shell (12) to be removably attached to the inner lining (14). The releasable connector arrangement includes a connecting stem (28) on the outer shell (12), and a receiving channel (30) in the inner lining (14).