A link type structure includes a lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a lower rail roller unit rollably connected to the lower rail, a lower rail swing arm rotatably connected to the lower rail roller unit and a door, a first link member having a first end rotatably connected to the door and a second end connected to a link hinge, a second link member having a first end rotatably connected to the lower rail roller unit and a second end connected to the link hinge, and a spring provided on the link hinge. The spring is configured to supply elastic force such that one end of the first link member applies force to the door in a direction toward outside of the vehicle body.

A link type structure includes a lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a lower rail roller unit rollably connected to the lower rail, a lower rail swing arm rotatably connected to the lower rail roller unit and a door, a first link member having a first end rotatably connected to the door and a second end connected to a link hinge, a second link member having a first end rotatably connected to the lower rail roller unit and a second end connected to the link hinge, and a spring provided on the link hinge. The spring is configured to supply elastic force such that one end of the first link member applies force to the door in a direction toward outside of the vehicle body.

A roof system for a vehicle having a roof opening in a roof part thereof, comprises a closure which is movable by an operating mechanism including at least a guide rail extending in a longitudinal direction of the roof system. A slide which is slidable in the guide rail cooperates at least with a closure support. The slide comprises a body and at least two curves provided in the body and each cooperating with at least a cam. The cams are provided on at least the closure support and the curves have such extent that they cross each other between their ends. The curves are arranged in substantially parallel walls of the body of the slide that face away from each other.

A roof system for a vehicle having a roof opening in a roof part thereof, comprises a closure which is movable by an operating mechanism including at least a guide rail extending in a longitudinal direction of the roof system. A slide which is slidable in the guide rail cooperates at least with a closure support. The slide comprises a body and at least two curves provided in the body and each cooperating with at least a cam. The cams are provided on at least the closure support and the curves have such extent that they cross each other between their ends. The curves are arranged in substantially parallel walls of the body of the slide that face away from each other.

An embodiment of the present disclosure provides a swing-in type of door structure of a vehicle that includes a door disposed in parallel at both sides of an entrance of a vehicle, and a door arm mounted on one side of the door to open or close the door by rotation, including: a center door bracket of which one end is fixed to one surface of an upper center of the door and that extends in a direction perpendicular to the door; a roller bracket of which one end is coupled to the other end of the center door bracket in a direction perpendicular to the center door bracket; and a roller mounted on the other end of the roller bracket and coupled to be rolled and rotated while in contact with a rail formed on a vehicle body of an upper side of the door.

An embodiment of the present disclosure provides a swing-in type of door structure of a vehicle that includes a door disposed in parallel at both sides of an entrance of a vehicle, and a door arm mounted on one side of the door to open or close the door by rotation, including: a center door bracket of which one end is fixed to one surface of an upper center of the door and that extends in a direction perpendicular to the door; a roller bracket of which one end is coupled to the other end of the center door bracket in a direction perpendicular to the center door bracket; and a roller mounted on the other end of the roller bracket and coupled to be rolled and rotated while in contact with a rail formed on a vehicle body of an upper side of the door.

A hinge assembly includes a first arm, a second arm, a rotatable pin coupling, and a power transfer conduit. The rotatable pin coupling rotationally couples the second arm to the first arm. The first arm defines a first portion of a channel, the second arm defines a second portion of the channel, and rotatable pin coupling defines a third portion of the channel. The power transfer conduit extends through the first portion of the channel at the first arm, the third portion of the channel at the rotatable pin coupling, and the second portion of the channel at the second arm.

A hinge assembly includes a first arm, a second arm, a rotatable pin coupling, and a power transfer conduit. The rotatable pin coupling rotationally couples the second arm to the first arm. The first arm defines a first portion of a channel, the second arm defines a second portion of the channel, and rotatable pin coupling defines a third portion of the channel. The power transfer conduit extends through the first portion of the channel at the first arm, the third portion of the channel at the rotatable pin coupling, and the second portion of the channel at the second arm.

A dual lower rail structure for opposite sliding doors is provided. The dual lower rail structure includes a first lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a second lower rail mounted in a longitudinal direction on a vehicle body at one side of the first lower rail, a first lower rail roller unit rollably connected to the first lower rail, a second lower rail roller unit having one end rollably connected to the second lower rail, and the other end connected to a sliding door, and a lower rail swing arm rotatably connected to the first lower rail roller unit and the sliding door.

A dual lower rail structure for opposite sliding doors is provided. The dual lower rail structure includes a first lower rail mounted in a longitudinal direction at a lower side of a vehicle body, a second lower rail mounted in a longitudinal direction on a vehicle body at one side of the first lower rail, a first lower rail roller unit rollably connected to the first lower rail, a second lower rail roller unit having one end rollably connected to the second lower rail, and the other end connected to a sliding door, and a lower rail swing arm rotatably connected to the first lower rail roller unit and the sliding door.