Camera Blade Drive Single-Surface Mounting
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Solution Overview
Problem
Conventional blade driving apparatuses for cameras require cumbersome assembly processes and increased manufacturing costs due to the need to mount electromagnetic driving sources and blades on both surfaces of the base plate, which complicates handling and results in a thicker design that is not suitable for ultra-slim camera applications.
Innovation Solution
The apparatus is designed with the electromagnetic driving source and blades mounted on one surface of the base plate, utilizing a rotor magnetized with magnetic poles and a yoke with a coil, positioned between the base plate and a cover plate, allowing for a compact design with reduced component count and simplified assembly by eliminating the need for additional mounting members.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If electromagnetic driving sources and blades are mounted on both surfaces of the base plate, then the structural balance and stability are improved, but the assembly process becomes cumbersome and manufacturing costs increase
Solution Approach 1:
The patent combines the electromagnetic driving source and blade assembly into a single integrated unit mounted on one surface of the base plate. The electromagnetic driving source includes a stator mounted on the base plate and a rotor that directly drives the blade, eliminating the need for separate mounting on both surfaces and reducing assembly complexity while maintaining structural stability.
Solution Approach 2:
The base plate serves multiple functions: it provides structural support, mounts the electromagnetic driving source, and acts as part of the magnetic circuit through its ferromagnetic material. This multi-functionality reduces the need for additional components and simplifies the overall structure.
2Stability of the object's composition
If electromagnetic driving sources and blades are mounted on both surfaces of the base plate, then structural balance is improved, but the number of components and fixing members increases
Solution Approach 1:
The electromagnetic driving source is designed as an integrated assembly where the stator, rotor, and blade connection form a unified structure mounted on a single surface. This merging reduces the total component count and eliminates the need for multiple fixing members while maintaining structural balance through careful design of the magnetic circuit and mounting arrangement.
3Stability of the object's composition
If conventional mounting methods are used on both surfaces, then structural stability is maintained, but the apparatus thickness increases
Solution Approach 1:
The patent reorganizes the mounting arrangement from a distributed two-surface configuration to a concentrated single-surface configuration. The electromagnetic driving source is positioned in one location with its magnetic circuit extending through the base plate, effectively utilizing the thickness dimension for magnetic flux paths rather than requiring symmetric distribution, thereby reducing overall apparatus thickness.
4Ease of manufacture
If components are mounted on one surface only, then assembly is simplified and manufacturing costs are reduced, but structural balance may be compromised
Solution Approach 1:
The base plate is designed as a ferromagnetic component that serves dual purposes: it provides mechanical support for mounting the electromagnetic driving source on one surface and simultaneously acts as part of the magnetic circuit. This multi-functionality allows single-surface mounting while maintaining structural and magnetic circuit integrity.
Solution Approach 2:
The base plate acts as an intermediary element that transfers both mechanical loads and magnetic flux. By positioning the electromagnetic driving source on one surface and utilizing the base plate's ferromagnetic properties, the structure achieves balance without requiring symmetric mounting on both surfaces.
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 configuration facilitates easier assembly, reduces the overall thickness of the apparatus, and lowers manufacturing costs while maintaining the slim design necessary for modern camera applications, including those with small lens diameters like mobile phones.
Implementation Method 1
a coil wound through the yoke
Implementation Method 2
a rotor magnetized to have a plurality of magnetic poles at preset angles on its peripheral surface
Data Source
AI summary
A blade driving apparatus for cameras includes a base plate having an aperture for a photographing optical path; a cover plate having the aperture for the photographing optical path, provided with a blade chamber between the base plate and the cover plate; at least one blade rotatably mounted to the base plate in the blade chamber; and at least one electromagnetic driving source driving the blade. The electromagnetic driving source includes a rotor magnetized to have a plurality of magnetic poles at preset angles on its peripheral surface and having a driving pin for driving pin for driving the blade by its rotation, a yoke having a plurality of magnetic pole sections opposite to the peripheral surface of the rotor, and a coil wound through the yoke. At least, the rotor and the yoke are interposed between the base plate and the cover plate so that, at least, the rotor is rotatably mounted to the base plate.