Camera Motor Cushioning Part for Impact Stress Reduction

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Solution Overview

Problem

Large aperture lenses in mobile devices are prone to damage due to internal impact stress when the lens bearing apparatus moves, affecting imaging quality.

Innovation Solution

A camera motor design incorporating a cushioning part made of vibration-absorbing materials and a drive apparatus with shape memory alloy wires or elastic columns to reduce impact stress on the lens bearing apparatus and lens, allowing for stable movement and image stabilization without hindering the lens's operation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Illumination intensity

If a large aperture lens is used to meet customer photographing requirements, then imaging quality is improved, but the lens becomes heavier and generates more impact stress during movement

Engineering Contradiction:

ImproveapertureVSAvoidlens weight

Core Design Contradiction:

Illumination intensityVSWeight of moving object

Solution Approach 1:

The patent applies beforehand cushioning by installing a cushioning part on the outer surface of the lens bearing apparatus before impact occurs. This cushioning part absorbs impact stress when the heavy lens causes the bearing apparatus to collide with the accommodating cavity wall, protecting the lens and bearing apparatus from damage while maintaining the large aperture design

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

2Adaptability or versatility

If the lens bearing apparatus moves to enable focusing and image stabilization, then camera functionality is improved, but impact stress damages the lens and bearing apparatus

Engineering Contradiction:

Improvecamera functionalityVSAvoidcomponent durability

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The cushioning part is pre-installed on the lens bearing apparatus to provide protection before impact occurs. When the apparatus moves during focusing or image stabilization and collides with the accommodating cavity, the cushioning part absorbs the impact stress, maintaining both functionality and reliability

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The cushioning part acts as an intermediary between the lens bearing apparatus and the accommodating cavity wall. It mediates the impact force during movement, reducing the direct transmission of shock to the lens and bearing apparatus while allowing the movement functionality to continue

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If the lens bearing apparatus is moved by the drive apparatus, then focusing and image stabilization are achieved, but collision with the accommodating cavity causes damage

Engineering Contradiction:

Improvelens movement controlVSAvoidimpact stress

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The cushioning part is installed in advance on the lens bearing apparatus to protect against impact stress when collision with the accommodating cavity occurs during driven movement for focusing or image stabilization

Inventive Principle:

Principle #11Beforehand cushioning (Prior cushioning)

Solution Approach 2:

The cushioning part converts the harmful impact stress from collision into beneficial energy absorption. The impact force that would normally damage the lens and bearing apparatus is transformed into deformation energy of the cushioning part, protecting the system while allowing the drive apparatus to continue its operation

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

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 solution effectively reduces the risk of damage to the lens bearing apparatus and lens, ensuring high imaging quality by absorbing impact and suppressing vibrations, thus protecting the components and maintaining camera performance.

Implementation Method 1

The cushioning part is made of a material that can cushion vibration absorption

Methodology Applied

Scientific EffectVibration absorption: Damping

Implementation Method 2

The shape memory alloy wire can be deformed when being powered on, to drive the body part and the lens bearing apparatus to move

Methodology Applied

Scientific EffectShape memory alloy deformation: Shape Memory Alloy

Implementation Method 3

When the lens bearing apparatus moves, the elastic column can be elastically bent when being pulled by the lens bearing apparatus

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS12143700B2Camera motor, camera module, and electronic device

Publication Date: 2024.11.12 HUAWEI TECH CO LTD

AI summary

A camera motor includes a motor housing, a lens bearing apparatus, a cushioning part, and a drive apparatus. The motor housing has an accommodating cavity, and the lens bearing apparatus is accommodated in the accommodating cavity and is spaced apart from an inner wall of the accommodating cavity. The cushioning part is disposed on an outer surface of the lens bearing apparatus. The drive apparatus is accommodated in the accommodating cavity, and the drive apparatus can drive the lens bearing apparatus to move in the accommodating cavity.