Liftable seat in a vehicle

A liftable seat in a vehicle, comprising:

• a base frame;
• a seat cushion frame disposed above the base frame and to which a seat cushion is coupled;
• a seat back frame coupled to the seat cushion frame, configured to be foldable toward the seat cushion frame in a forward direction, and to which a seat back is coupled;
• at least one lifting member having a lower end portion and an upper end portion, wherein the lower end portion is connected to the base frame and the upper end portion is coupled to the seat cushion frame, the lifting member being configured to lift the seat cushion frame upward from an unlifted position to the lifted position;
• a lifting member locking mechanism which fixes the lifting member to the unlifted position or to a lifted position,
• wherein the lower end portion of the lifting member forms a lower hinge that is rotatably connected to the base frame, and the upper end portion of the lifting member forms an upper hinge that is connected to the seat cushion frame, so that the seat cushion frame to which the upper hinge is connected is lifted from the unlifted position to the lifted position;
• wherein the lifting member locking mechanism comprises:
• an adjustable lockable gas spring which includes i) a cylinder part filled with pressurized gas and ii) a rod part configured to be drawn out from or inserted into the cylinder part, in which the adjustable lockable gas spring is capable of locking a position of the rod part drawn out from the cylinder part, and is disposed under the lifting member, wherein a first end of the gas spring is pivotally connected to a first connecting part formed at a first lower end portion of the lifting member that is positioned at a front side of the first end of the gas spring and a second end of the gas spring is pivotally connected to a second connecting part formed at a second lower end portion of the lifting member that is positioned at a rear side of the second end of the gas spring.

A liftable seat in a vehicle, comprising:

• a base frame;
• a seat cushion frame disposed above the base frame and to which a seat cushion is coupled;
• a seat back frame coupled to the seat cushion frame, configured to be foldable toward the seat cushion frame in a forward direction, and to which a seat back is coupled;
• a least one lifting member having a lower end portion and an upper end portion, wherein the lower end portion is connected to the base frame and the upper end portion is coupled to the seat cushion frame, the lifting member being configured to lift the seat cushion frame upward from an unlifted position to a lifted position;
• a lifting member locking mechanism which fixes the lifting member to the unlifted position or the lifted position,
• wherein the lower end portion of the lifting member forms a lower hinge that is rotatably connected to the base frame, and the upper end portion of the lifting member forms an upper hinge that is connected to the seat cushion frame, so that the seat cushion frame to which the upper hinge is connected is lifted from the unlifted position to the lifted position, wherein the lifting member locking mechanism comprises:
• a) a cylinder which includes a cylinder part and a rod part configured to be drawn out from or inserted into the cylinder part, wherein the cylinder is disposed under the lifting member, the cylinder further comprising i) a first end of the cylinder pivotally connected to a first connecting part formed at a first lower end portion of the lifting member that is positioned at a front side of the first end of the cylinder, and ii) a second end of the cylinder pivotally connected to a second connecting part formed at a second lower end portion of the lifting member that is positioned at a rear side of the second end of the cylinder, with the cylinder being mounted such that a length of a portion of the rod part drawn out from the cylinder part when the lifting member is folded in a horizontal direction and a length of a portion of the rod part drawn out from the cylinder part when the lifting member is rotated with respect to the lower hinge so as to be raised in a vertical direction are different from each other;
• b) a pressure supply member which supplies pressure to the cylinder part so as to adjust a length of the rod part drawn out from the cylinder part;
• and
• c) a manipulation part which controls the pressure supply member so as to adjust a length of the rod part drawn out from the cylinder part, thereby moving the seat between the lifted position and the unlifted position.