Seat headrest and vehicle seat
AssigneeYanfeng International Automotive Technology Co., Ltd.
InventorsYineng Shen, Xinze Zhang, Xiaocui Zhang, Aiping Zhang, Kunjia Gan
Life of this patent
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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.
Claims18
A seat headrest device comprising:
- a fixed base, which is configured to be mounted to a seat backrest,
- a headrest,
- a headrest electric motor, and
- a composite motion mechanism comprising a screw-nut mechanism and a pinion-rack mechanism, wherein the headrest electric motor can drive the headrest to move relative to the fixed base through the composite motion mechanism,
- the screw-nut mechanism comprising a lead screw which is drivable by the headrest electric motor to rotate and a nut which is movable along the lead screw,
- the pinion-rack mechanism comprising a pinion coupled with the nut and a movable rack coupled with the headrest,
- the pinion and the nut coupled by a slider,
- the nut fixedly mounted to the slider,
- the pinion rotatably mounted to the slider.
Dependencies are inferred from the claim text.