Disc Stopper Mechanism for Precise Optical Detection

The patent applies preliminary action by pre-positioning the stopper at a specific location on the slider corresponding to the detection zone. Before the disc completes its rotation, the stopper is already in place to receive the protrusion, ensuring the disc stops precisely at the required position without overshooting or misalignment. This pre-positioning mechanism guarantees accurate stopping at the detection zone.

The patent uses an intermediary mechanism consisting of the stopper and protrusion pair. The protrusion on the disc acts as an intermediary element that interfaces with the stopper on the slider. When the protrusion engages with the stopper, it mediates the stopping action, transferring the stopping force precisely at the intended position and enabling accurate positioning of the disc relative to the detection zone.

The patent applies segmentation by dividing the stopping function into two separate components: a protrusion element on the disc and a stopper element on the slider. This segmentation allows each component to be simple in design while collectively achieving precise stopping. The protrusion is a simple radial feature on the disc, and the stopper is a simple blocking feature on the slider, avoiding the need for a complex integrated stopping mechanism.

The patent implements self-service through the automatic engagement of the protrusion with the stopper. The disc's own rotational motion automatically brings the protrusion into contact with the stopper at the correct position, eliminating the need for external control systems, sensors, or actuation mechanisms. The system uses the disc's inherent rotation to trigger the stopping action, simplifying the overall device structure.