Vehicle-mounted display screen device and vehicle

A vehicle-mounted display screen device, comprising:

• a display screen;
• a motor, and a transmission system, wherein the motor drives the display screen to rotate via the transmission system, the transmission system comprises a first shaft, a second shaft, a first semi-clutch, a second semi-clutch and an elastic component, the first shaft is coaxial with the second shaft, the first semi-clutch is slidably sleeved on the first shaft axially, the second semi-clutch is connected to the second shaft, a first tooth is formed on an end surface of the first semi-clutch facing the second semi-clutch, a second tooth is formed on an end surface of the second semi-clutch facing the first semi-clutch, and the elastic component applies axial elastic force to the first semi-clutch to enable the first tooth and the second tooth to be engaged with each other;
• the transmission system further comprises a speed reducer, the motor is in transmission connection with the speed reducer, the first shaft is an output shaft of the speed reducer, and the second shaft is fixed on the display screen;
• and a fixed rack, the motor and the speed reducer are mounted on the fixed rack;
• and the fixed rack is provided with a first contact switch and a second contact switch, and a contact terminal is fixed on the display screen;
• the contact terminal is in contact with the first contact switch when the display screen is in a horizontal screen state;
• and the contact terminal is in contact with the second contact switch when the display screen is in a vertical screen state.