Lens Device Magnetic Repulsion Collision Control

The patent applies preliminary anti-action by positioning permanent magnet members (second permanent magnet member at the first end part and third permanent magnet member at the second end part of the lens barrel) to generate repulsive forces against the first permanent magnet member on the lens frame before collision occurs. This repulsive magnetic force acts in advance to prevent the lens frame from reaching the collision position, thereby eliminating the harmful collision impact while allowing smooth lens position adjustment.

The patent replaces traditional mechanical collision prevention mechanisms (such as physical buffers, springs, or mechanical stops) with a magnetic field-based repulsive force system. By using permanent magnet members that generate repulsive forces, the system achieves collision suppression without complex mechanical structures, thereby reducing overall device complexity while maintaining effective collision prevention.

The patent uses permanent magnet members that can be manufactured using cost-effective methods and integrated into the lens barrel and lens frame structures. The permanent magnets replace expensive mechanical buffer systems or precision mechanical stop mechanisms, providing a more economical solution for collision suppression that is suitable for mass production in consumer electronics.

The patent maintains positioning flexibility by allowing the lens frame to move freely within the optical axis direction while simultaneously applying preliminary anti-action through repulsive magnetic forces from the permanent magnet members. The magnetic repulsion acts before the lens frame reaches the collision position, preventing the generation of collision sounds and discomfort while preserving the lens frame's ability to move to various focusing and zooming positions.