Mirror-Guided Cutting Length Display for Variable Cutting Depth

The patent implements a movable mirror unit that can change its position and orientation dynamically. The mirror unit is mounted on a movable carrier that can be positioned at different locations along the cutting depth range, and the mirror itself can be rotated to adjust the light beam deflection angle. This dynamic adjustment capability allows the system to adapt to different cutting depths and maintain precise cutting edge position display without requiring a completely different device structure for each cutting depth setting.

The patent introduces a mirror unit as an intermediary element between the light source and the workpiece. This mirror unit acts as a mediator that redirects the light beam at variable angles to indicate different cutting edge positions. By using this intermediary reflective element, the system achieves flexible and precise position indication without requiring direct mechanical coupling between the display mechanism and the cutting tool, thus resolving the contradiction between precision and structural simplicity.

The mirror unit is designed with movable mounting and rotational capability, allowing it to dynamically adjust its position and orientation in response to different cutting depth settings. The movable carrier can be positioned along a guide rail or track to accommodate various cutting depths, and the mirror can be rotated to deflect the light beam at the appropriate angle. This dynamic adaptability enables the same device to serve multiple cutting depth requirements without requiring multiple fixed-angle light sources.

The adjustable mirror unit serves multiple functions: it deflects the light beam at variable angles to indicate different cutting edge positions, adapts to different cutting depth settings, and maintains accurate position indication across the entire cutting depth range. This single multi-functional component replaces what would otherwise require multiple fixed-angle light sources or complex mechanical display mechanisms for each cutting depth setting.

The mirror unit serves as a passive optical intermediary that reflects the light beam to indicate cutting edge position without requiring active sensing or complex mechanical tracking mechanisms. This passive reflective approach is inherently more reliable than active display elements because it has no electronics, no power requirements, and fewer moving parts that could fail. The mirror simply redirects light based on its position and orientation, providing accurate position indication through geometric optics rather than complex mechanical or electronic systems.

The patent replaces complex mechanical display mechanisms (such as moving needles, digital displays, or electronic sensors) with a simple optical reflection system. Instead of using a mechanically complex movable display element that requires precision mounting and calibration, the system uses a mirror that passively reflects light to indicate position. This substitution of mechanical complexity with optical simplicity improves reliability while maintaining or enhancing measurement precision.