Buckle, lacing device and boot

A buckle (1) for a lacing device (2) of a boot (3), in particular a ski boot (3), comprising a base part (4) and a grip lug (8), wherein the base part (4) can be placed with its underside (5) against a shell (7) of a boot (3) and can be fastened to the shell (7),

• wherein the base part (4) has at least one first receiving extension (9) on its upper side (6), and wherein a swivel element (10) is configured on the grip lug (8), wherein in an engagement position (11) the swivel element (10) is latched at least in certain regions in the first receiving extension (9) to form a swivelable first latching connection, so that the grip lug (8) can be swiveled in the engagement position (11) from an open engagement position (12) into a closed engagement position (13) by means of the swivel element (10),
• wherein at least one first latching extension (14) is configured on the upper side (6) of the base part (4), and wherein the grip lug (8) is configured with at least one latching element (15) corresponding to the first latching extension (14), wherein the first latching extension (14) and the latching element (15) are configured such that, in the closed engagement position (13), the latching element (15) is latched at least in certain regions on the first latching extension (14) to form a releasable second latching connection,
• so that the grip lug (8) is secured in the closed engagement position (13) against leaving the engagement position (11) and against swiveling into the open engagement position (12).