Rotatable Disc Attraction Device Using Gravity and Reflection

The patent applies the dynamics principle by making the reflective disc rotatable rather than static. The disc can be manually rotated to a signaling position where the reflectors face outward to attract attention, and automatically returns to a retracted position when not in use. This dynamic movement allows a simple construction to achieve effective attention-attracting capability at different operational states.

The patent applies the self-service principle by using passive reflective materials that do not require external energy sources. The reflectors on the disc passively reflect existing light (such as vehicle headlights) to attract attention, eliminating the need for batteries, motors, or electronic circuits. The system serves itself by utilizing ambient light rather than generating its own illumination.

The patent applies dynamics by enabling the device to transition between visible and hidden states. The rotatable disc allows users to manually activate the signaling function by rotating the disc to a visible position, and the automatic return mechanism ensures the device retracts to a hidden position when not needed, providing both visibility when required and user control over when the signaling function is active.