Pendulum laser device with lockable pendulum assembly

The device (1) has a pendulum arrangement (2) arranged at a housing (4). A laser unit (13) is attached at the pendulum arrangement for producing laser rays. A securing device (3) comprising a two-armed securing pendulum (20) is provided for locking the pendulum arrangement. The securing device is designed such that the securing device automatically locks the pendulum arrangement during the deflection of the pendulum arrangement above a critical angle. A contact element (25) i.e. disk, comprises a rubberized coating at a side that faces the pendulum arrangement.