Set of coupling assemblies for a board for board sports

A set of coupling assemblies comprising a right coupling assembly and a left coupling assembly, the set of coupling assemblies being configured to be mounted on a board for board sports in which both feet of a user are connected to a single board,

• wherein the right coupling assembly is configured to receive a right boot and comprises:
• a right inner receiving unit configured to receive and engage an inner boot coupling part which is positioned on a left side of the right boot,
• a right outer receiving unit configured to receive and engage an outer boot coupling part which is positioned on a right side of the right boot,
• wherein the left coupling assembly is configured to receive a left boot and comprises:
• a left inner receiving unit configured to receive and engage an inner boot coupling part which is positioned on a right side of the left boot,
• a left outer receiving unit configured to receive and engage an outer boot coupling part which is positioned on a left side of the left boot,
• wherein each outer receiving unit comprises an outer locking element configured to engage the outer boot coupling part and to hold the outer boot coupling part in place,
• each inner receiving unit comprises a locking arm which is pivotable about a main inner pivot axis from a locked position to a released position and vice versa, wherein the locking arm comprises an inner locking cam configured to engage the inner boot coupling part and to hold the inner boot coupling part in place,
• wherein each inner receiving unit comprises a pull mechanism connected to the locking arm, the pull mechanism comprising:
• at least one elongate interlink member which extends between the two inner receiving units and interlinks the two inner receiving units, and
• a link pull member configured to engage the boot or the inner boot coupling part and to receive a pull force from the boot or boot coupling part when the boot or boot coupling part is no longer held by the coupling assembly and moves away from the coupling assembly, and to be pulled over a pull distance by said boot or by the boot coupling part,
• wherein the pull mechanism is configured to transfer the pull force and the pull distance to the at least one elongate interlink member, and to convert the pull distance in an interlink pull distance of the elongate interlink member, and wherein said interlink pull distance pivots the locking arm of the other coupling assembly from the locking position to the released position, thereby releasing the other boot.