Projection Lens Adjustment Module with Flexible Connection Line
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Solution Overview
Problem
Conventional projectors face challenges in accurately and conveniently adjusting the focal length of the projection lens due to the obstruction of the projection beam by the focus ring, whether it is positioned at the top or bottom, which affects the accuracy and convenience of focusing.
Innovation Solution
A projection lens adjustment module with a flexible connection line and a driving mechanism that allows the adjusting element to move in a direction non-parallel to the optical axis, enabling the focal length to be adjusted without obstructing the projection beam, by using a flexible connection line connected between the adjusting element and the driving mechanism, allowing the adjusting element to be positioned at the side of the projector.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the focus ring is disposed to protrude from the top of the projector, then the user can manually adjust the focus of the projection lens, but the projection beam will be blocked by the focus ring during operation resulting in incomplete projection frames
Solution Approach 1:
The adjusting element is repositioned from the top surface to the side surface of the projector body, changing the spatial dimension of operation. This allows the focus adjustment function to be achieved without the adjusting element protruding into the projection beam path, thereby eliminating the blockage problem while maintaining ease of operation.
2Object-generated harmful factors
If the focus ring is disposed at the bottom of the projector, then the projection beam will not be blocked during focus adjustment, but the projector requires to be lifted from a table surface to operate the focus ring which shifts projection frames
Solution Approach 1:
Instead of placing the adjusting element at the bottom like conventional designs, this invention positions it on the side surface of the projector body. This side positioning allows users to access and operate the focus adjustment without lifting the projector, maintaining both beam path clearance and operational convenience.
3Device complexity
If a rigid connection is used between the adjusting element and the driving mechanism, then the structure is simple, but the adjusting element cannot be positioned at the side of the projector when the driving mechanism is at the top
Solution Approach 1:
A flexible connection line is used to connect the adjusting element on the side surface with the driving mechanism at the top. This flexible connection allows the adjusting element to be positioned independently at the side without requiring a rigid structural connection, enabling spatial separation while maintaining functional coupling.
Data Source
AI summary
A projection lens adjustment module applicable to a projection lens is provided. The projection lens includes a first assembly and a second assembly. The projection lens adjustment module includes a flexible connection line, an adjusting element and a driving mechanism. The flexible connection line has a first end and a second end opposite to each other. The adjusting element is connected to the first end. The driving mechanism is connected to the second assembly and the second end. When the adjusting element drives the first end to move along a first direction thereby leading the second end to move along a second direction non-parallel to the first direction, the second end drives the second assembly to move along an optical axis direction of the projection lens relative to the first assembly through the driving mechanism.