Device for automatically adjusting angle of monitor on vehicle seat back

A device for automatically adjusting an angle of a monitor on a vehicle seat back, the device comprising:

• a fixation bracket mounted on a front seat back upper-frame;
• a first rotation bracket rotatably mounted on an upper portion of the fixation bracket via a first hinge pin;
• a second rotation bracket rotatably mounted on a lower portion of the fixation bracket via a second hinge pin;
• a monitor mounted on a front surface of the first rotation bracket such that the monitor faces in a rearward direction;
• a motor mounted on a bottom surface of the second rotation bracket;
• an angle adjustment bar integrally combined with a rear surface of the first rotation bracket;
• a lead screw including:
• a lower portion rotatably connected to an output shaft of the motor, and an upper portion configured to pass through the second rotation bracket;
• and
• an ascending and descending member having a threaded hole configured to engage with a threaded surface of the lead screw,
• wherein a rotation of the lead screw is configured to cause the ascending and descending member to ascend and descend along the lead screw while being fastened by a hinge portion to an end portion of the angle adjustment bar.