Head restraint systems and the method for adjusting headrest

Head restraint systems and the method for adjusting headrest

  • CN 104,379,400 B
  • Filed: 08/13/2013
  • Issued: 03/08/2019
  • Est. Priority Date: 08/13/2012
  • Status: Active Grant
First Claim
Patent Images

1. a kind of head restraint systems comprising:

  • Headrest (11;

    16;

    17,18);

    Guiding trestle (13;

    25,26), the headrest (11;

    16;

    17,18) it is installed to the guiding trestle and makes the headrest(11;

    16;

    17,18) relative to the guiding trestle (13;

    It 25,26) is displaceable;

    WithActuator (12;

    21-23;

    31-39,22,23), be couple to it is described headrest (11;

    16;

    17,18) and the guiding trestle(13;

    25,26), the actuator (12;

    21-23;

    31-39,22,23) be configured to make the headrest (11;

    16;

    17,18) oppositeIn the guiding trestle (13;

    25,26) it shifts, the actuator (12;

    21-23;

    31-39,22,23) include shaft drive(22,23) and the power drive unit (21 for being couple to the shaft drive (22,23);

    31-39), the shaft drive(22,23) include axis (22) and with the axis (22) cooperation axis nut (23),The power drive unit (21;

    It 31-39) is arranged in and is defined in the headrest (11;

    16;

    17,18) chamber within shellIn body (19),The power drive unit (21;

    It 31-39) include motor (31),The wherein actuator (12;

    21-23;

    31-39,22,23) have in the motor (31) and the shaft driveThe two-stage worm gearing (32-35) coupled between (22,12), andThe wherein side that the worm screw (32) of the first worm gearing of the two-stage worm gearing (32-35) is verified with torqueFormula is couple to the output shaft of the motor (31), and the second worm-drive dress of the two-stage worm gearing (32-35)The worm gear (35) set is couple to the axis (22) or the axis nut (23) in such a way that torque verifies,Wherein, the power drive unit (21;

    It 31-39) is configured to rotationally drive the axis (22) and the axis nut (23)In one, one in the axis (22) and the axis nut (23) is installed so that it can turn around its longitudinal axis (48)It is dynamic, and another in the axis (22) and the axis nut (23) is installed so that it cannot be rotated around its longitudinal axis (48);

    Wherein, in order to adjust in a first direction it is described headrest (11;

    16;

    17,18) height makes the output of the motor (31)Axis is rotated with first direction, makes the axis (22) and the axis nut (23) by the two-stage worm gearing (32-35)In it is one rotated with first direction, thus make in the axis (22) and the axis nut (23) described another is oppositeOne in the axis (22) and the axis nut (23) and relative to the power drive unit (21;

    31-39)It is shifted in said first direction in a manner of translation;

    AndWherein, in order to adjust in a second direction opposite to the first direction it is described headrest (11;

    16;

    17,18) height,It rotates the output shaft of the motor (31) with second direction, the axis is made by the two-stage worm gearing (32-35)(22) one and in the axis nut (23) is rotated with second direction, to make the axis (22) and the axis nut(23) in it is described another relative to one in the axis (22) and the axis nut (23) and relative to describedPower drive unit (21;

    31-39) shifted in this second direction in a manner of translation;

    AndWherein, the guiding trestle includes the cross member (26) that a pair of (25) at bar and is extended between a pair of bar, and instituteState power drive unit (21;

    The cross member (26) 31-39) are attached to, so that the power drive unit (21;

    31-39)Adjusting the headrest (11;

    16;

    17,18) it is not shifted relative to the guiding trestle during height.

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