Plate Spring Lens Positioning for Compact Imaging Devices
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Solution Overview
Problem
Conventional imaging devices, such as security cameras, require complex structures and numerous screws for pan and tilt movements of the lens, making it difficult to achieve downsizing and cost reduction.
Innovation Solution
The use of a plate spring mechanism with a columnar member and a base that allows the lens case to be turned in the tilt direction, secured by an elastic force, eliminating the need for complex mechanisms and screws, and enabling a simpler configuration for lens direction and position adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If a ball joint or universal joint mechanism is used to position the lens block in pan and tilt directions, then the lens can be positioned accurately, but the structure becomes complicated and requires large space and numerous screws
Solution Approach 1:
The patent extracts and eliminates the complicated ball joint or universal joint mechanism from the lens positioning system. Instead of using these complex mechanisms, the invention employs a simplified plate spring structure that directly presses the lens case to achieve positioning without requiring multiple screws and complex component assemblies, thus reducing structural complexity while maintaining positioning functionality
Solution Approach 2:
The plate spring structure serves multiple functions simultaneously: it provides elastic pressing force to position the lens case, acts as a mounting structure for the lens block, and eliminates the need for separate screws and complex joint mechanisms. This multi-functional design reduces the overall number of components and simplifies the structure while maintaining accurate lens positioning
2Manufacturing precision
If a ball joint or universal joint mechanism is used to position the lens block, then the lens can be positioned accurately, but the number of screws and component parts increases
Solution Approach 1:
The patent merges the positioning function, mounting function, and structural support function into a single integrated plate spring structure. This eliminates the need for separate screws, ball joints, and universal joints, significantly reducing the quantity of components while maintaining accurate lens positioning through the elastic pressing action of the plate spring
3Reliability
If conventional mechanisms with multiple screws are used, then the lens can be securely positioned, but the manufacturing cost and installation space increase
Solution Approach 1:
The plate spring structure provides self-positioning and self-securing functionality through its elastic pressing action. The plate spring automatically holds the lens case in the correct position without requiring multiple screws or complex assembly steps, reducing both manufacturing cost and installation complexity while maintaining reliable lens position stability
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
This solution allows for the downsizing of the imaging device while maintaining the ability to adjust and fix the lens direction and position with a reduced number of components, resulting in a cost-effective and compact security camera design.
Implementation Method 1
a plate spring secured to the base and pressing a circumferential surface of the columnar member toward the base by elastic force
Implementation Method 2
the plate spring may secure the cover to the base by elastic force
Data Source
AI summary
Disclosed herein is an imaging device including: a lens case on which a lens is installed; a columnar member having a central axis coincidental with a rotational axis of the lens case and formed on a lateral surface of the lens case, the rotational axis extending in a tilt direction being an in-plane direction perpendicular to a horizontal direction; a base supporting the lens case so as to be turnable in the tilt direction; and a plate spring secured to the base and pressing a circumferential surface of the columnar member toward the base by elastic force.