Variable Aperture Motor With Magnetic Lens Stabilization

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Solution Overview

Problem

The aperture of camera modules in electronic devices is fixed, leading to poor photographing performance.

Innovation Solution

A variable aperture drive motor is introduced, comprising a base assembly, a lens support body, driving magnets, driving coils, a blade set, and magnetic attraction plates, allowing the lens support body to rotate and change the aperture diameter, enabling adjustable aperture settings.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If a fixed aperture structure is used in the camera module, then the device complexity is reduced, but the photographing performance deteriorates

Engineering Contradiction:

Improveaperture structure complexityVSAvoidphotographing performance

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent implements a variable aperture mechanism where the aperture diameter can be dynamically adjusted between different sizes (e.g., F1.8 and F2.4) through a drive motor that rotates the blade set. This transforms the static fixed aperture into a dynamic adjustable aperture, enabling the camera module to adapt to different photographing conditions and improve overall photographing performance.

Inventive Principle:

Principle #15Dynamics

2Adaptability or versatility

If a variable aperture mechanism is added to the camera module, then the photographing performance is improved, but the device complexity increases

Engineering Contradiction:

Improvephotographing performanceVSAvoidaperture structure complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent employs a magnetic drive system where driving magnets and driving coils generate electromagnetic forces to rotate the lens support body and blade set, replacing traditional mechanical gear or linkage systems. This electromagnetic actuation method reduces the number of mechanical transmission components, simplifies the overall structure, and enables precise control of the variable aperture mechanism.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The drive motor assembly serves multiple functions: it rotates the lens support body to adjust focus, rotates the blade set to control aperture diameter, and positions the magnetic attraction plates to maintain lens stability. By integrating these functions into a single compact motor unit, the patent reduces overall device complexity while achieving variable aperture capability.

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Adaptability or versatility

If the lens support body is made movable to enable aperture adjustment, then the aperture becomes variable, but the lens stability deteriorates when the device is inverted

Engineering Contradiction:

Improveaperture adjustabilityVSAvoidlens stability

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent introduces magnetic attraction plates that generate magnetic attraction forces to counteract the gravitational force acting on the lens support body and lens assembly. When the device is inverted, these magnetic forces prevent the lens support body from rotating due to weight, maintaining lens stability and preventing imaging errors while allowing aperture adjustment through controlled electromagnetic actuation.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

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

The variable aperture drive motor effectively addresses the fixed aperture issue by allowing adjustable aperture settings, improving camera performance and preventing lens movement due to weight when the device is inverted.

Implementation Method 1

driving coils, wherein there are a plurality of driving coils, the driving coils are provided on a side wall of the base assembly corresponding to the driving magnets, and the driving magnets and the driving coils are relatively induced so that the lens support body rotates relative to the base assembly

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 2

first magnetic attraction plates, wherein there are a plurality of first magnetic attraction plates, and the first magnetic attraction plates are provided on a bottom end of the base assembly corresponding to the driving magnets

Methodology Applied

Scientific EffectMagnetic attraction force: Magnetism

Data Source

PatentUS20240377706A1Variable Aperture Drive Motor, Camera Apparatus, and Electronic Device

Publication Date: 2024.11.14 SHANGHAI BILLU ELECTRONICS CO LTD

AI summary

The disclosure provides a variable aperture drive motor, a camera apparatus, and an electronic device. A variable aperture drive motor, includes: a base assembly, the base assembly being provided with an accommodating cavity; a lens support body, at least a part of the lens support body being movably provided inside the accommodating cavity; driving magnets, wherein there are a plurality of driving magnets; driving coils, wherein there are a plurality of driving coils, the driving coils are provided on a side wall of the base assembly corresponding to the driving magnets, and the driving magnets and the driving coils are relatively induced so that the lens support body rotates relative to the base assembly; and first magnetic attraction plates, wherein there are a plurality of first magnetic attraction plates, and the first magnetic attraction plates are provided on a bottom end of the base assembly corresponding to the driving magnets.