Drive shaft rotary movement converting device for motor vehicle seat, has conversion unit converting rotary movement into linear movement of massage module, and swivel plate arranged to make additional load for drive motor in idle area

摘要

The device has a conversion unit converting a rotary movement of a drive shaft (34) into a linear movement of a massage module along a movement distance such that an idle area exists in the movement distance. The rotary movement causes a decreased movement or no movement of the module opposite to another range of the movement distance. A swivel plate (40) is arranged to make an additional load for the drive motor in the idle area. An independent claim is also included for a massage module of a seat with a device for converting a rotary movement of a drive shaft into a periodically running linear movement of a massage module.