Abstract: The present disclosure relates to a connection mechanism for a headrest (101) and a soft pillow (100), and a headrest-soft pillow assembly comprising the connection mechanism. The headrest (101) comprises a rear cover (300), and the connection mechanism comprises: a magnet (150) disposed in the soft pillow (100), and a magnetic metal piece (230) provided in the rear cover of the headrest (101). The connection mechanism is configured to removably connect the soft pillow (100) to the headrest (101) through the magnetic attraction between the magnet (150) and the magnetic metal piece (230). Fastening the soft pillow (100) to the headrest (101) by magnetic attraction may not affect the movement and performance of the headrest (101) and meanwhile facilitates easy, rapid mounting and dismounting of the soft pillow (100).

Abstract: A headrest structure, comprising a headrest driving seat (400) fixed to a seat backrest, a lead screw motor (410), a gear mechanism (330), transmission racks (320) and a headrest part (10). The headrest structure further comprises a headrest rear cover plate (200) disposed on a rear side of the headrest part (10), wherein the headrest rear cover plate (200) is provided thereon with rear cover racks (220). The gear mechanism (330) is engaged between the rear cover racks (220) and the transmission racks (320). The lead screw motor (410) drives the gear mechanism (330) to move according to the principle of a lead screw transmission mechanism, thereby driving the headrest part (10) to move relative to the headrest driving seat (400).

Abstract: The present invention relates to a seat headrest device comprising a fixed base (30), a headrest (20) and a headrest electric motor (40). The headrest electric motor (40) drives the headrest (20) to move relative to the fixed base (30) through a composite motion mechanism comprising a screw-nut mechanism (70) and a pinion-rack mechanism (10). The present invention further discloses a seat headrest device comprising the seat headrest device. The seat headrest device has the following characteristics: a stroke of the headrest can be significantly enhanced by means of the composite movement mechanism.