Projector Lens Adjustment Module with Inclined Guiding Rail
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Solution Overview
Problem
Existing projector lens adjustment mechanisms cause deformation of the casing structure due to interference between the projection lens and stop structures, leading to difficulties in reversing the adjustment and affecting picture quality.
Innovation Solution
A lens adjustment module with a driven structure and a guiding member featuring a closed ring guiding rail inclined to the axis of rotation, allowing the projection lens to move back and forth without excessive force transfer, preventing deformation and eliminating the need for high-strength materials like magnesium alloy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a knob is screwed to the projection lens to adjust the rise or fall of the projection lens, then the projection lens can be moved to change the height of the projected image, but the interference between the projection lens and the stop structure causes deformation of the casing structure of the projection lens
Solution Approach 1:
The patent introduces a driven structure as an intermediary component between the adjustment mechanism and the projection lens. This driven structure absorbs the interference forces generated during adjustment, preventing them from being transmitted to the projection lens and causing deformation of its casing structure.
Solution Approach 2:
The patent segments the adjustment mechanism into distinct functional components: a guiding member for directional control, a driven structure for force absorption, and a rotating member for operation. This segmentation allows each component to perform its specific function without transmitting harmful forces to the projection lens.
2Adaptability or versatility
If the projection lens is adjusted until it contacts the stop structure, then the adjustment range is maximized, but the applied force of the knob becomes too tight and not easy to reverse
Solution Approach 1:
The driven structure acts as a mediator that decouples the adjustment mechanism from the projection lens. It allows the lens to reach the full adjustment range by contacting the stop structure while absorbing the excessive force, making the adjustment easy to reverse without damaging the lens or requiring excessive force.
3Strength
If the casing structure is reinforced with high-strength materials like magnesium alloy to prevent deformation, then the structural strength is improved, but the manufacturing cost increases
Solution Approach 1:
The driven structure serves as a force-absorbing intermediary that protects the projection lens from deformation. This allows the use of ordinary, cost-effective materials for the projection lens casing instead of expensive high-strength materials like magnesium alloy, thereby reducing manufacturing costs while maintaining structural integrity.
Solution Approach 2:
The patent employs a cost-effective driven structure made from ordinary materials to protect the projection lens. This approach replaces the need for expensive high-strength materials, achieving the same protective function at a lower manufacturing cost.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Prevents deformation of the casing structure, simplifies the design, and reduces manufacturing costs by avoiding the use of expensive materials while maintaining precise adjustment capabilities.
Implementation Method 1
The guiding member has a closed ring guiding rail, and the driven structure is slidably disposed at the closed ring guiding rail so that the driven structure is moved relative to the guiding member around a closed ring path defined by the closed ring guiding rail. A normal direction of a surface where the closed ring path is located is not parallel to the axis of rotation.
Implementation Method 2
The rotating member is connected to the guiding member. When the rotating member rotates and drives the guiding member to continuously rotate in a single rotational direction around the axis of rotation
Data Source
AI summary
A projector, including a body, a light source, a light valve, a projection lens, and a lens adjustment module, is provided. The light source and the light valve are disposed in the body, and the projection lens is movably disposed on the body. The lens adjustment module includes a driven structure connected to the projection lens, a guiding member and a rotating member connected to the guiding member. The guiding member is disposed on the body to be rotatable along an axis of rotation and has a closed ring guiding rail. The driven structure is slidably disposed at the closed ring guiding rail and is configured to move relative to the guiding member along a closed ring path defined by the closed ring guiding rail. A normal direction of a surface where the closed ring path is located is not parallel to the axis of rotation.