Abstract: A lumbar support for a vehicle seat includes: a support panel made of an elastic material and supporting the user's lumbar vertebra; a first guide rod supporting the support panel; a second link bracket fastened to the first guide rod to be movable up and down; a first link bracket disposed under the second link bracket to be movable up and down with respect to the second link bracket, and having an operation block providing a supporting force to the lumbar vertebra; a first rotary screw vertically extending, thread-fastened to the first link bracket, and moving up and down the first link bracket by rotating about a longitudinal axis; and a second rotary screw vertically extending, thread-fastened to the second link bracket, and moving up and down the second link bracket by rotating about a longitudinal axis.

Abstract: A lumbar support for a vehicle seat includes: a support panel made of an elastic material and supporting the user's lumbar vertebra; a first guide rod supporting the support panel; a second link bracket fastened to the first guide rod to be movable up and down; a first link bracket disposed under the second link bracket to be movable up and down with respect to the second link bracket, and having an operation block providing a supporting force to the lumbar vertebra; a first rotary screw vertically extending, thread-fastened to the first link bracket, and moving up and down the first link bracket by rotating about a longitudinal axis; and a second rotary screw vertically extending, thread-fastened to the second link bracket, and moving up and down the second link bracket by rotating about a longitudinal axis.

Abstract: Disclosed is a hinge assembly for rotatably mounting a trunk lid to a vehicle body. The hinge assembly for a trunk lid of a vehicle, includes a hinge arm configured to be coupled to the trunk lid, a hinge bracket configured to be coupled to a vehicle body and having a hinge shaft, the hinge arm being rotatably coupled to the hinge bracket, a torsion bar configured to be coupled to the hinge arm and to provide an elastic force to the hinge arm in an opening direction, and a cushion assembly provided at one end of the hinge arm adjacent to the hinge shaft and configured to adjust a rotation speed of the hinge arm in response to the elastic force of the torsion bar.

Abstract: Disclosed is a hinge assembly for rotatably mounting a trunk lid to a vehicle body. The hinge assembly for a trunk lid of a vehicle, includes a hinge arm configured to be coupled to the trunk lid, a hinge bracket configured to be coupled to a vehicle body and having a hinge shaft, the hinge arm being rotatably coupled to the hinge bracket, a torsion bar configured to be coupled to the hinge arm and to provide an elastic force to the hinge arm in an opening direction, and a cushion assembly provided at one end of the hinge arm adjacent to the hinge shaft and configured to adjust a rotation speed of the hinge arm in response to the elastic force of the torsion bar.

Abstract: A mandrel for bending a rectangular duct body is provided. A round part and a shaft pin hole are formed at the front end of the mandrel, connection pieces and rollers are formed at the front end of the mandrel, protruded parts for supporting the bent part of the rectangular duct body and depressed parts in which depression parts will be formed are formed on both sides of the rollers, and oil grooves are formed in the sides of the rollers. Accordingly, there is an advantage in that workability and productivity can be improved because frictional force between the rollers and between the inside of the rectangular duct body and the rollers is reduced when performing a bending work because grease within the oil grooves formed in the rollers performs a lubrication action.