Apparatus for adjusting height of seat belt

1. An apparatus of adjusting a height of a seat belt, the apparatus comprising:

a sliding rail vertically provided on a side of a seatback; and

a slider including a belt ring to hang a shoulder belt, wherein the slider is engaged to the sliding rail and configured to vertically slide along the sliding rail, the belt ring being positioned on a top portion of the seatback in a state in which the slider is positioned on an upper end portion of the sliding rail,

wherein the belt ring is coupled to an upper end portion of the slider, and

wherein the upper end portion of the slider is configured to slide to a position higher than the upper end portion of the sliding rail.

2. The apparatus of claim 1 , further including:

a cover covering the upper end portion of the sliding rail and configured to vertically slide,

wherein the cover is supported by the slider to vertically slide with the slider in a predetermined co-sliding section including an uppermost position of the slider.

3. The apparatus of claim 2 , further including:

a downward stopper provided on a seatback frame to which the sliding rail is affixed,

wherein the cover is caught by the downward stopper during downward movement of the cover along the co-sliding section, so that the downward movement of the cover is stopped by the downward stopper.

4. The apparatus of claim 2 , further including:

an upward stopper provided on a seatback frame to which the sliding rail is affixed,

wherein the cover is caught by the upward stopper during upward movement of the cover along the co-sliding section, so that the upward movement of the cover is stopped by the upward stopper.

5. The apparatus of claim 4 , wherein the cover includes a protrusion formed on an internal surface of the cover at a position below the upper stropper to be selectively caught by a lower surface of the upward stopper.

6. The apparatus of claim 2 , further including:

a spring configured to continuously exert an elastic force in a direction in which the cover moves downward.

7. The apparatus of claim 5 , wherein an upper end portion of a spring is coupled to the cover and a lower end portion of the spring is coupled to a seatback frame.

8. The apparatus of claim 1 , further including:

a folding rail provided to extend from the upper end portion of the sliding rail and configured to be folded rearward of the seatback about a hinge axis located at a lower end portion of the folding rail.

9. The apparatus of claim 8 , wherein the slider is foldable rearward along with the folding rail in a state in which the slider is positioned on the folding rail.

10. The apparatus of claim 8 , further including:

a cover covering the upper end portion of the sliding rail and the folding rail and configured to rotate rearward of the seatback about the hinge axis,

wherein the cover is folded rearward along with the slider and the folding rail in a state in which the slider is positioned on the folding rail.

11. The apparatus of claim 2 ,

wherein the sliding rail has a front open region, and

wherein a screen is affixed to a top portion and a bottom portion of the slider to cover the front open region of the sliding rail.

12. The apparatus of claim 11 ,

wherein a guide roller is transversely connected inside the cover,

wherein the screen includes an upper screen affixed to an upper end portion of the slider, and

wherein the upper screen extends and retracts between a ceiling surface of the cover and the guide roller in response to sliding of the slider to cover the front open region above the slider.

13. The apparatus of claim 11 ,

wherein the screen includes a first lower screen coupled to a lower end portion of the slider, and a second lower screen provided below the first lower screen, and

wherein the first and second lower screens move in response to sliding of the slider to cover the front open region below the slider in a state in which the first lower screen overlaps a front surface of the second lower screen.

14. The apparatus of claim 1 ,

wherein a plurality of first locks is disposed along the sliding rail, and

wherein a second lock is formed on the slider to engage with a corresponding one of the first locks to keep the slider at a fixed vertical position.

15. The apparatus of claim 10 ,

wherein the sliding rail has a front open region, and

wherein a screen is affixed to a top portion and a bottom portion of the slider to cover the front open region of the sliding rail.