Display screen support holder

A display screen support holder, comprising:

• a stand;
• a screen connecting base;
• and
• a constant force spring,
• wherein:
• the screen connecting base is pivotally connected with the stand such that the screen connecting base is rotatable about a screen rotation center and configured to be connected with a display;
• after a display screen is mounted to the screen connecting base, an overall gravity center of a combined gravity of the display screen and the screen connecting base is set to be deviated from the screen rotation center, in a projection plane perpendicular to a rotation axis of the screen connecting base;
• two ends of the constant force spring comprise a moving end and a swinging end, wherein the moving end is movably arranged on the stand, and the swinging end is pivotally connected with the screen connecting base such that the swinging end is swingable about a center of swinging;
• during swinging of the screen connecting base, a screen torque, which the combined gravity generates with respect to the screen rotation center, changes constantly with the swinging of the screen connecting base;
• the moving end of the constant force spring is moved along with the swinging of the screen connecting base, the constant force spring is stretched or contracted with the movement of the moving end, and a spring torque which a spring force of the constant force spring generates with respect to the screen rotation center also changes along with the stretching and the contracting, and the constant force spring is configured to dynamically balance the screen torque;
• the display screen support holder further comprises a moving member movably arranged on the stand and a track arranged on the stand, wherein the moving end of the constant force spring is connected with the moving member, and the moving member is movably arranged on the track;
• and
• the display screen support holder further comprises a sliding rail, wherein the sliding rail comprises roll balls, a movable rail which serves as the moving member and a fixed rail which serves as the track;
• the moving end of the constant force spring is connected with the movable rail, and the fixed rail is fixedly arranged on the stand;
• the roll balls are arranged between the movable rail and the fixed rail, and the movable rail is rollably and movably arranged on the fixed rail via the roll balls.