Protective helmet

A protective helmet, comprising:

• a helmet shell for at least partially covering a head of a helmet wearer;
• a holding strap arrangement arranged on the helmet shell for holding the helmet shell on the head of the helmet wearer, wherein the holding strap arrangement comprises a chin strap, a first closure part and a second closure part, the chin strap being connected to the helmet shell, the first closure part being connected to the helmet shell, the second closure part being connected to the chin strap and the second closure being configured to be brought into closed connection with the first closure part, with a closure being formed, wherein the closure automatically opens in a first closed position in event of a predetermined opening tensile force acting between the first closure part and the second closure part, and the first closure part and the second closure part being separate from each other, wherein, in a second closed position of the closure, the first closure part and the second closure part are always in closed connection with each other irrespective of a tensile force acting between the first closure part and the second closure part, wherein, in order to form a respective closed position, one of the first closure part and the second closure part comprises a pivotable pivoting component, the pivoting component being mounted pivotably on a basic body of the one of the first closure part and the second closure part comprising the pivotable pivoting component, wherein at least one tongue retaining receptacle is formed in the one of the first closure part and the second closure part comprising the pivotable pivoting component, and another one of the first closure part and the second closure part has a tongue arrangement for engaging in the at least one tongue retaining receptacle, wherein, in the first closed position, the pivoting component has a first introduction direction and a first removal direction oriented in an opposed manner with respect thereto, wherein, in order to form the first closed position, the tongue arrangement is configured to be inserted in a direction of the first introduction direction into the one of the first closure part and the second closure part comprising the pivoting component, and, in order to release the first closed position, the tongue arrangement is configured to be moved in a direction of the first removal direction out of the one of the first closure part and the second closure part comprising the pivoting component, wherein the at least one tongue retaining receptacle is bounded by a first retaining flank, the first retaining flank interacting in a retaining manner with the tongue arrangement in the first closed position, the first retaining flank having an inclination in relation to a perpendicular to the first introduction direction and, with respect to the perpendicular to the first introduction direction, the first retaining flank is inclined toward the first removal direction, as seen from laterally outside toward inside.