Method for automatic seat pan tilt
A seat assembly includes a seat pan that is tilted automatically by way of a seat bucket moving up and down relative to a base structure. The seat bucket is pivotably coupled to a carrier. The carrier and the seat bucket each follow respective channels of a base structure. The movement of the seat bucket along the channel of the base structure causes the pivoting of the seat bucket relative to the carrier. The channels are shaped with an angular orientation resulting in the seat pan angle changing as the seat bucket moves up and down.
1 . A seating assembly comprising:
a base structure; the base structure comprising a pair of side panels; wherein the pair of side panels each define:
a carrier channel; and
a bucket channel; wherein the bucket channel comprises an upper portion, a lower portion, and an inlet portion; wherein a distance between the upper portion and the carrier channel increases from the inlet portion to the lower portion; wherein the lower portion is disposed below and extends from the upper portion; wherein the inlet portion is disposed above and extends from the upper portion;
a carrier; the carrier comprising one or more carrier bearings; wherein the one or more carrier bearings are disposed in and follow the carrier channel;
a seat bucket; the seat bucket comprising one or more seat bucket bearings; wherein the one or more seat bucket bearings are disposed in and follow the bucket channel;
wherein the seat bucket is coupled to the carrier by a revolute joint; wherein the upper portion is shaped relative to the carrier channel to cause rotation of the seat bucket about the revolute joint when the seat bucket follows the upper portion; and
a metering block and an energy absorbing sheet; wherein the metering block is coupled to the base structure by the energy absorbing sheet; wherein the metering block defines a plurality of holes arranged in a linear array; the carrier comprising a lock assembly; wherein the lock assembly is configured to lock and unlock the seat bucket by selectively engaging with the plurality of holes of the metering block.
2 . The seating assembly of claim 1 , wherein the upper portion is rectilinear.
3 . The seating assembly of claim 1 , wherein the upper portion is curvilinear.
4 . The seating assembly of claim 1 , wherein the lower portion is curvilinear; wherein a distance between the lower portion and the carrier channel increases away from the upper portion.
5 . The seating assembly of claim 1 , wherein the carrier channel and the bucket channel are interior-facing slots defined by the pair of side panels.
6 . The seating assembly of claim 1 , wherein the revolute joint comprises an axis of rotation which is in a lateral direction.
7 . The seating assembly of claim 1 , the seat bucket comprising a seat pan; wherein the rotation of the seat bucket about the revolute joint causes rotation of the seat pan.
8 . The seating assembly of claim 7 , wherein the carrier and the seat bucket follow the carrier channel and the bucket channel upwards to simultaneously raise a height of the seat pan and decrease an angle of the seat pan; wherein the carrier and the seat bucket follow the carrier channel and the bucket channel downwards to simultaneously lower the height of the seat pan and increase the angle of the seat pan.
9 . The seating assembly of claim 8 , wherein the angle of the seat pan changes by at least six degrees as the seat bucket follows the upper portion.
10 . The seating assembly of claim 9 , wherein the angle of the seat pan changes by at least nine degrees as the seat bucket follows the upper portion.
11 . The seating assembly of claim 1 , wherein the plurality of holes face at least one of the pair of side panels.
12 . The seating assembly of claim 1 , the base structure comprising a middle spreader; wherein the middle spreader rigidly couples the pair of side panels; wherein the energy absorbing sheet couples the middle spreader and the metering block.
13 . The seating assembly of claim 1 , wherein the energy absorbing sheet is in an undeformed state while the seat bucket follows the upper portion; wherein the carrier causes the energy absorbing sheet to deform as the seat bucket follows the lower portion.
14 . The seating assembly of claim 13 , wherein the carrier defines a recess; wherein the recess receives but does not engage with the metering block when the seat bucket follows the upper portion.