A seat (1) for transport vehicles with an articulated frame (2) capable of moving and changing shape between a neutral position N and a comfort position C, which comprises a headrest portion (21) mechanically linked by means of a connector (22) to a connection area of a backrest portion (23) that changes the height position thereof as the frame (2) moves from the neutral position N to the comfort position C thereof, the connector (22) being suitable for this change in height position to be transmitted, by means of mechanical drag, to the headrest portion (21), the headrest portion (21) being mechanically linked by means of an upper guide unit (31) of a guide system to the chassis (4) which is configured such that the inclination of both the headrest portion (21) and the backrest portion (23) increase the inclination thereof with respect to the vertical as the frame (2) moves from the neutral position N to the comfort position C thereof.

The invention relates to a vehicle seat having a backrest which comprises a backrest part and a backrest base element, the backrest part comprising a middle backrest element which is arranged pivotably on the backrest base element, wherein the backrest part comprises two lower backrest side elements and two upper backrest side elements, which are each mechanically coupled to the middle backrest element, wherein the two lower backrest side elements are arranged pivotably on the backrest base element, wherein at least one joint device is provided in each case between a lower backrest side element and an upper backrest side element, wherein a lower backrest side element and an upper backrest side element are each arranged at an angle α.sub.L, α.sub.R to one another, wherein pivoting of the middle backrest element causes a change in the angle α.sub.L, α.sub.R, wherein the joint device comprises at least one first elastic element.

The invention relates to a vehicle seat having a backrest which comprises a backrest part and a backrest base element, the backrest part comprising a middle backrest element which is arranged pivotably on the backrest base element, wherein the backrest part comprises two lower backrest side elements and two upper backrest side elements, which are each mechanically coupled to the middle backrest element, wherein the two lower backrest side elements are arranged pivotably on the backrest base element, wherein at least one joint device is provided in each case between a lower backrest side element and an upper backrest side element, wherein a lower backrest side element and an upper backrest side element are each arranged at an angle α.sub.L, α.sub.R to one another, wherein pivoting of the middle backrest element causes a change in the angle α.sub.L, α.sub.R.

A vehicle seat includes a seat bottom coupled to floor of a vehicle and a seat back coupled to the seat bottom to move relative to the seat bottom. The seat back includes a backrest and a backrest adjuster configured to move relative to the backrest to change a shape of the backrest.

A vehicle seat in accordance with the present disclosure includes a seat bottom and a seat back. The seat back is coupled to the seat bottom to move relative to the seat bottom. The seat bottom is coupled to a floor of a vehicle and configured to move relative to the seat back.

Described are adjustable seats having a lower portion of a back rest attached to a seat frame having an upper frame and a lower frame. A pivot axis is positioned at an upper end of the lower portion of the back rest, and an upper portion of the back rest is pivotally attached to the pivot axis. The location of the pivot axis is configured to be positioned below a person's shoulders when the person is seated in the adjustable seat. The upper portion of the back rest is also pivotally adjustable relative to the lower portion of the back rest. A seat pan having a front portion pivotally coupled to a rear portion can be attached to the upper frame. An actuation mechanism is configured to simultaneously control a vertical height of the upper frame and a rotational position of the front portion of the seat pan.

A seat adjuster for a vehicle seat is provided. The seat adjuster comprises a rotation mechanism that comprises a rotation part, a rotation drive device that rotates the rotation part, an engagement target member that is configured to be rotated integrally with the rotation part and comprises engagement target portions formed along a rotational direction of the engagement target member, and an engagement member that is configured so that, when one of the engagement target portions is located in a specified engageable position, the engagement member is moved in a direction closer to the engagement target member to be engageable with the one of the engagement target portions located in the specified engageable position.

The invention relates to a vehicle seat comprising a seat part and a backrest, wherein the backrest comprises at least one left-hand backrest longitudinal support at least one middle backrest longitudinal support and at least one right-hand backrest longitudinal support extending in the vertical direction of the backrest. The backrest longitudinal supports are each connected to the seat part and/or a seat-part frame in a lower region and comprise at least one cushion element. The backrest longitudinal supports are hingedly connected to the seat part and/or the seat-part frame and are interconnected by means of an elongate backrest cross strut, wherein it is possible to vary a distance between at least two backrest longitudinal supports by displacing the at least one backrest cross strut along the vertical direction of the backrest in the upper region of the backrest.

In a seat reclining device, a seatback frame forming a skeleton of a seatback is coupled to a seat cushion frame to be rotatable about a shaft with respect to the seat cushion frame. One end portion of a first sliding bracket is rotatably coupled to a middle portion of the seatback frame by a driving unit. The other end portion of the first sliding bracket extends toward a vehicle body located behind the seatback. A second sliding bracket is mounted on the vehicle body located behind the seatback and extends toward the first sliding bracket in a front and rear longitudinal direction to be connected to the first sliding bracket. The second sliding bracket is configured to guide a sliding movement of the first sliding bracket while the first sliding bracket is being rotated.

A child safety seat includes a seat portion, a backrest assembly connected with the seat portion and including a first and a second portion slidably connected with each other and a third portion slidably connected with the second portion, and a backrest adjusting system carried with the backrest assembly and configured to provide a first stage of height adjustment where the first and second portions are locked with each other and the third portion is movable relative to the first and second portions for adjustment, and a second stage of height adjustment where the second portion is locked with the third portion and unlocked from the first portion so that the second portion and the third portion are movable in unison relative to the first portion for adjustment.