Tailgate lift device, in particular for a vehicle

The platform device has a four-link mechanism (14) with upper arm (16) connected by the first joint (40) to the load platform and the second joint (42) to the carrier device (20); and a lower arm (18) connected to the platform by a third joint (50) and the carrier device by a fourth joint (52). The piston-cylinder unit (22) is connected by a fifth joint (60) to the lower arm and by a sixth joint (62) to the carrier device.