A shape memory alloy (SMA) controlled hinge assembly is provided, including assemblies and combinations for adjusting a shape or position of an occupant support component, such as a vehicle seat support component or other seating component. The assembly includes an occupant support component and a hinge assembly configured to adjust a shape or position of at least a portion of the occupant support component. The hinge assembly includes a stationary plate and a movable plate rotatable relative to the base plate about a fixed axis of rotation. The hinge assembly includes a shape memory alloy wire coupling the stationary plate with the movable plate. An actuator is provided and configured to transform the phase of the shape memory alloy wire. In various aspects, the occupant support component is selected from one of a seat bottom; a seatback; a seat bolster; a seat head rest, and the like.

A seat includes: a backrest configured to support a back of a seated occupant; a headrest provided to an upper portion of the backrest and configured to support a back of a head of the seated occupant; an overhang portion configured to overhang forward so as to laterally cover the head of the seated occupant from a side portion of the headrest; an overhang adjustment mechanism capable of adjusting an overhang amount of the overhang portion; and a height adjustment mechanism capable of adjusting a height position of the headrest with respect to the backrest.

A seat includes: a backrest configured to support a back of a seated occupant; a headrest provided to an upper portion of the backrest and configured to support a back of a head of the seated occupant; an overhang portion configured to overhang forward so as to laterally cover the head of the seated occupant from a side portion of the headrest; an overhang adjustment mechanism capable of adjusting an overhang amount of the overhang portion; and a height adjustment mechanism capable of adjusting a height position of the headrest with respect to the backrest.

A passenger seat headrest includes a frame and a support band. The frame includes a main portion, a first side wing connected to the main portion, and a second side wing connected to the main portion distal from the first side wing. The support band is connected to the frame and extends from the first side wing to the second side wing.

A passenger seat headrest includes a frame and a support band. The frame includes a main portion, a first side wing connected to the main portion, and a second side wing connected to the main portion distal from the first side wing. The support band is connected to the frame and extends from the first side wing to the second side wing.

An aircraft passenger seat grouping including a first passenger seat, a second passenger seat positioned to one side of the first passenger seat, an armrest positioned between the first and second passenger seats, a shell member positioned between the first and second passenger seats, the shell member extending between the first and second passenger seats in a forward direction above the armrest, and a privacy headrest extension movably attached to the privacy shell, the privacy headrest extension movable between a stowed position substantially within the privacy shell and a deployed position forward of the shell member wherein at least a portion of the privacy headrest extension is outside of the privacy shell and above the armrest. The shell member provides privacy between the seats and the privacy headrest extension deploys to increase privacy between the seats.

An aircraft passenger seat grouping including a first passenger seat, a second passenger seat positioned to one side of the first passenger seat, an armrest positioned between the first and second passenger seats, a shell member positioned between the first and second passenger seats, the shell member extending between the first and second passenger seats in a forward direction above the armrest, and a privacy headrest extension movably attached to the privacy shell, the privacy headrest extension movable between a stowed position substantially within the privacy shell and a deployed position forward of the shell member wherein at least a portion of the privacy headrest extension is outside of the privacy shell and above the armrest. The shell member provides privacy between the seats and the privacy headrest extension deploys to increase privacy between the seats.

An automobile headrest includes a mounting component, a pillow portion detachably connected with the mounting component, a movable block provided with engaging protrusions arranged vertically, a side of the pillow portion adjacent to the mounting component is provided with a groove, at least part of the movable block is movably arranged in the groove, an end of the movable block disposed with the engaging protrusions is exposed from a groove opening of the groove, the pillow portion is provided with a vertically oriented slideway adjacent to the groove opening, the mounting component is provided with a sliding block matched with the slideway, the sliding block is provided with an engagement portion matched with the engaging protrusions, the sliding block is arranged in the slideway, the engaging protrusions are protruded from the groove opening and partially arranged in the engagement portion, when the pillow portion is connected with the mounting component.

An automobile headrest includes a mounting component, a pillow portion detachably connected with the mounting component, a movable block provided with engaging protrusions arranged vertically, a side of the pillow portion adjacent to the mounting component is provided with a groove, at least part of the movable block is movably arranged in the groove, an end of the movable block disposed with the engaging protrusions is exposed from a groove opening of the groove, the pillow portion is provided with a vertically oriented slideway adjacent to the groove opening, the mounting component is provided with a sliding block matched with the slideway, the sliding block is provided with an engagement portion matched with the engaging protrusions, the sliding block is arranged in the slideway, the engaging protrusions are protruded from the groove opening and partially arranged in the engagement portion, when the pillow portion is connected with the mounting component.

A head securing assembly for supporting a user's head while sleeping and sitting upright in a seat includes a pair of clamps that is each positionable on a top side of a backrest of a seat in a vehicle. Each of the clamps is positioned on opposite sides of a headrest post with respect to each other. A support is coupled to each of the clamps and the support is directed forwardly from the backrest of the seat. A pair of cushions is each slidably coupled to the support and each of the cushions can be positioned on opposite sides of a user's head when the user sits in the seat. In this way the user's head is inhibited from tipping to the left or to the right when the user is sleeping.