Camera Module Elastic Stiffening Material Shock Absorption
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Solution Overview
Problem
Conventional camera modules face issues with uneven adhesive thickness leading to vertical tilting, physical damage from direct contact between the lens assembly and image sensor, lack of shock resistance, and weakened adhesive strength due to narrow coated surfaces.
Innovation Solution
A camera module design featuring a housing with a hole at the upper center and a bottom-opened inner space, incorporating an elastic stiffening material between the lens assembly and the housing, and using a hollow hole for adhesive infusion to ensure even pressure and indirect contact between the lens assembly and image sensor, thereby reducing shock and preventing damage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If adhesive is coated to the bottom surface of the lens assembly or upper surface of the PCB to fix the lens assembly, then the lens assembly can be bonded to the PCB, but uneven adhesive thickness causes vertical tilting of the lens assembly which ill affects image resolution
Solution Approach 1:
A cushioning member is introduced as an intermediary component between the lens assembly and the PCB. This cushioning member serves as a mediator that compensates for adhesive thickness variations, preventing vertical tilting of the lens assembly while maintaining secure bonding. The cushioning member absorbs the dimensional discrepancies, ensuring both strong adhesion and precise lens alignment for optimal image resolution.
2Ease of manufacture
If adhesive is coated to fix the lens assembly to the PCB, then the lens assembly can be mounted, but direct contact between the lens assembly and PCB causes physical damage to the lens assembly
Solution Approach 1:
The cushioning member acts as a protective intermediary between the lens assembly and the PCB. During the mounting process, this intermediary component prevents direct contact between the fragile lens assembly and the rigid PCB, thereby avoiding physical damage while still enabling secure mechanical attachment and optical alignment.
3Device complexity
If the conventional camera module is directly exposed to outside shock, then the structure remains simple, but the module suffers from outside shock without shock reduction capability
Solution Approach 1:
A shock reduction member is pre-installed within the housing as a beforehand protective measure. This member is positioned in advance to cushion and absorb external shocks before they can reach and damage the sensitive internal components such as the lens assembly and image sensor. This prior cushioning approach enhances shock resistance while maintaining relatively simple module structure.
4Strength
If epoxy is introduced into the image sensor area, then adhesive strength can be sufficient, but the coated surface is too narrow which weakens adhesive strength and causes product defects
Solution Approach 1:
The cushioning member serves as an intermediary bonding interface that distributes the adhesive load over a larger surface area. Instead of concentrating epoxy in a narrow region that risks defect formation, the cushioning member provides an extended bonding surface that enhances adhesive strength while reducing the risk of product defects through more uniform stress distribution.
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 design achieves even pressure distribution, reduces shock impact, prevents physical damage to the image sensor, and enhances adhesive strength, ensuring improved image resolution and stability.
Implementation Method 1
an elastic stiffening material inserted between a lens hole periphery at an upper inner side of the housing and an upper edge of the lens assembly
Implementation Method 2
a bottom surface of the lens assembly and an upper surface of the image sensor are mutually attached by an adhesive infused into the hollow hole
Data Source
AI summary
The present invention relates to a camera module, the camera module including: a PCB (Printed Circuit Board), an image sensor mounted on the PCB and formed with an imaging device for converting light to an electrical signal; a housing fixed a bottom end to an upper surface of the PCB, the housing being a case formed with a hole at an upper center and having a bottom-opened inner space; a lens assembly having at least one lens aligned to the lens hole by being positioned at and contacted to an upper surface of the image sensor and accommodated at an inner space of the housing; and an elastic stiffening material inserted between a lens hole periphery at an upper inner side of the housing and an upper edge of the lens assembly.