The invention provides a seat headrest backward folding mechanism which is characterized in that two ends of a headrest main rotating shaft are rotatably mounted on a backrest bottom plate, a headrest rod is fixed on the headrest main rotating shaft, a headrest force storage torsion spring is arranged between the headrest main rotating shaft and the backrest bottom plate, and the headrest force storage torsion spring has torsion for driving the headrest main rotating shaft to rotate backward; the pull rod assembly is hinged to the backrest bottom plate, a reset torsion spring is arranged between the pull rod assembly and the backrest bottom plate, the reset torsion spring has pre-tightening force for driving the pull rod assembly to move upwards, and the cam lock assembly is arranged between the headrest main rotating shaft and the pull rod assembly. The cam lock assembly is in a locking state under the action of the torsion of the headrest force storage torsion spring and the pre-tightening force of the reset torsion spring. The cam lock assembly can be unlocked by pulling the pull rod assembly, so that the rotation constraint on the headrest main rotating shaft is relieved, and the backward folding of the headrest rod is realized. The device has a stable locking function and an automatic resetting function, and is ingenious in structure, convenient to operate and low in cost.
本发明提出了一种座椅头枕向后翻折机构,所述头枕主转轴的两端转动安装于靠背底板上,所述头枕杆固定于头枕主转轴上,头枕主转轴与靠背底板之间设有头枕蓄力扭簧,所述头枕蓄力扭簧具有驱动头枕主转轴向后转动的扭力;所述拉杆组件铰接于靠背底板上,拉杆组件与靠背底板之间设有复位扭簧,所述复位扭簧具有驱动拉杆组件向上运动的预紧力,所述凸轮锁组件布设于头枕主转轴与拉杆组件之间,且凸轮锁组件在头枕蓄力扭簧的扭力和复位扭簧的预紧力作用下呈锁止状态;拉动拉杆组件,能实现凸轮锁组件的解锁,从而解除对头枕主转轴的转动约束,进而实现头枕杆的向后翻折。本发明具有稳定的锁止功能和自动复位功能,且结构巧妙、操作便捷、成本低。
Backward folding mechanism for seat headrest
一种座椅头枕向后翻折机构
13.05.2025
Patent
Elektronische Ressource
Chinesisch
IPC: | B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet |
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