Vehicle display system

1. A vehicle display system comprising:

a movable body including a frame having an annular shape or a non-annular shape in which a portion of the annular shape is missing, the frame being allowed to shift between at least two fixed positions corresponding to an upright position in which an inner region of the frame is directed at least to a vehicle rear side and a tilt position in which the inner region is directed to at least a vehicle upper part on a vehicle rear side and a vehicle lower side relative to the upright position;

a first holding body that holds one of a vehicle upper side and a vehicle lower side of the movable body in the upright position;

a second holding body that holds the other one of the vehicle upper side and the vehicle lower side;

a display device that displays information to be displayed such that the information is recognized by a user inside a vehicle interior in the inner region of the frame;

a driving device that transmits a driving force at a time of a shift operation of the movable body between the upright position and the tilt position based on power of a power source to the first holding body, the driving force corresponding to a first driving force at a time of shifting the movable body from the upright position to the tilt position and a second driving force at a time of shifting the movable body from the tilt position to the upright position, the second driving force being reverse to the first driving force; and

a guide device that guides the shift operation of the movable body between the upright position and the tilt position by guiding a guided portion provided in the second holding body along a guide rail, wherein

the guided portion includes a rotating shaft and first and second rotating bodies disposed coaxially with the rotating shaft, rolling contact surfaces rolling along the guide rail being formed on the first and second rotating bodies,

the guide rail includes a first guide surface that comes into contact with the rolling contact surface of the first rotating body at one side in a radial direction of the first and second rotating bodies and guides the first rotating body while rolling the first rotating body, and a second guide surface that comes into contact with the rolling contact surface of the second rotating body at the other side in the radial direction and guides the second rotating body while rolling the second rotating body,

the first rotating body is disposed to roll while coming into contact with only the first guide surface, and

the second rotating body is disposed to roll while coming into contact with only the second guide surface.

2. The vehicle display system according to claim 1 , wherein

the guide rail shifts the movable body from the upright position to the tilt position by guiding the guided portion such that a first held portion of the movable body held by the first holding body moves in a direction of the first driving force when the first driving force acts on the first holding body, and shifts the movable body from the tilt position to the upright position by guiding the guided portion such that the first held portion moves in a direction of the second driving force when the second driving force acts on the first holding body.

3. The vehicle display system according to claim 1 , wherein

the first rotating body includes a rolling portion having the rolling contact surface, and a gear portion coaxial with the rolling portion, and

the guide rail has a rack portion on which a plurality of teeth is formed, the rack portion rolling the first rotating body while meshing with teeth of the gear portion.

4. The vehicle display system according to claim 2 , wherein

the first rotating body includes a rolling portion having the rolling contact surface, and a gear portion coaxial with the rolling portion, and

the guide rail has a rack portion on which a plurality of teeth is formed, the rack portion rolling the first rotating body while meshing with teeth of the gear portion.