Crash-activated headrest for motor vehicle, has blocking part with opening for link from carrier structure, and release device which allows release of tension spring

摘要

A drive unit (38) comprises a tension spring (40) and a blocking device (42). The blocking device includes a blocking part (44) and release device (48). The blocking device has an elongate opening (50) through which a link from a carrier structure (20) engages. In use, the blocking part supports the tension of the tension spring. After operation of the release device (48), the blocking part releases the tension spring.