Belt locking device for a vehicle seat

A belt locking device that is for a vehicle seat and operates advantageously in response to a crash, the belt lock device comprising:

• a tightening unit supported by a support element and operatively connected to a belt lock by way of a transmission means, wherein
• (a) the tightening unit is operative for pulling the belt lock, by way of the transmission means, from an initial position into a crash position in response to the crash, and
• (b) the tightening unit is mounted for moving relative to the support element in a longitudinal direction of the transmission means;
• and
• a motor operatively associated with the tightening unit for moving the tightening unit relative to the support element in the longitudinal direction of the transmission means, so that the belt lock is moved by way of the transmission means.