Sliding unit for vehicle

1. A sliding unit in a vehicle, the sliding unit including:

a rail provided on the vehicle;

a fixing portion formed of a material through which magnetism is flowable and provided along a direction in which the rail extends;

a moving portion that is slidable along the rail; and

a magnetic module provided in the moving portion, disposed toward the fixing portion, and selectively locked to the fixing portion by a magnetic path to selectively fix the moving portion to the rail.

2. The sliding unit of claim 1 , wherein the magnetic module includes:

a fixed permanent magnet that has an annular shape and is in contact with the fixing portion and provided toward the fixing portion in the magnetic module; and

an electromagnet provided on an opposite side of the fixing portion in the magnetic module,

wherein the magnetic module is locked to or unlocked from the fixing portion according to a change in a polarity of the electromagnet.

3. The sliding unit of claim 2 ,

wherein when the magnetic module and the fixing portion together form the magnetic path according to the polarity of the electromagnet, the magnetic module is locked to the fixing portion, and

wherein when the magnetic path is formed only in the magnetic module according to the polarity of the electromagnet, the magnetic module is unlocked from the fixing portion.

4. The sliding unit of claim 2 ,

wherein the magnetic module is provided with a rotating permanent magnet that rotates based on a rotation axis thereof, and

wherein the rotating permanent magnet is rotated when a direction of the magnetic path flowing through the magnetic module is changed to reinforce a magnetic force of the magnetic path flowing through the magnetic module.

5. The sliding unit of claim 1 ,

wherein the rail is configured to be provided on a floor of the vehicle, and

wherein a seat is coupled to the moving portion to slide along the rail on the floor of the vehicle.

6. The sliding unit of claim 1 ,

wherein the rail is provided with a cable veyor, and

wherein the cable veyor includes a first end portion configured to be connected to a power supply of the vehicle and extending along the rail, and a second end portion bent and connected to an end portion of the moving portion to thereby supply power to the moving portion.

7. The sliding unit of claim 1 ,

wherein the rail is configured to be provided on a floor of the vehicle, and

wherein a console is coupled to the moving portion to slide along the rail on the floor of the vehicle.

8. The sliding unit of claim 1 ,

wherein the rail includes a bottom surface and first and second side walls to form an internal space,

wherein the fixing portion is provided on the bottom surface, and

wherein the moving portion is disposed in the internal space of the rail.

9. The sliding unit of claim 8 , wherein the moving portion is provided with a guide roller rotatably supported by at least one of the first and second side walls of the rail, so that left and right positions of the moving portion are regulated by the guide roller when the moving portion slides.

10. The sliding unit of claim 8 , wherein the moving portion is provided with a sliding roller rotatably supported by the bottom surface of the rail, so that top and bottom positions of the moving portion are regulated by the sliding roller when the moving portion slides.

11. The sliding unit of claim 8 ,

wherein the rail is provided with a rail cover extending in a longitudinal direction of the rail at upper end portions of the first and second side walls,

wherein a slit hole extending in the longitudinal direction is formed in the rail cover,

wherein a driving portion is provided above the rail cover to provide a driving force to the moving portion, and

wherein the driving portion and the moving portion are connected by a connection portion penetrating through the slit hole.

12. The sliding unit of claim 11 ,

wherein the rail is configured to be provided on a floor of the vehicle, and

wherein a seat is configured to be coupled to the connection portion to be disposed above the rail cover, the driving portion is located in the seat, and the seat is slidable along the rail on the floor of the vehicle.

13. The sliding unit of claim 1 , wherein the rail includes a rack gear extending in a longitudinal direction on a side of the rail, and one side of the moving portion is provided with a pinion gear engaged with the rack gear, so that the moving portion slides along the rail when the pinion gear rotates.

14. The sliding unit of claim 13 ,

wherein the rail is provided with a cable veyor, and

wherein the cable veyor has a first end portion configured to be connected to a power supply of the vehicle at an end portion of the rack gear and extending along one side of the rail in an opposite direction from which the rack gear extends, and a second end portion bent and connected to one end portion of the moving portion to thereby supply power to the moving portion.

15. The sliding unit of claim 14 , wherein the moving portion has a pinion gear located at a first end portion of the moving portion opposite to a second end portion of the moving portion connected to the cable veyor, and the magnetic module is provided at a point between the first end portion and the second end portion of the moving portion.