Camera Module Barrel Positioning Support Structure
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Solution Overview
Problem
The existing camera modules for vehicles are prone to deformation under external forces, leading to a reduction in image quality due to the exposure of the barrel member, which can cause the shield case to exceed its elastic limit and affect the accuracy of the barrel's position within the housing.
Innovation Solution
A camera module design featuring a housing with a support system that includes a peripheral wall portion and a control portion, where the peripheral wall portion covers the imaging device and the control portion is elastically engaged with the inner surface of the first case, preventing excessive deformation and maintaining the barrel's position accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the shield case is used to fix the barrel member using spring force, then the barrel member can be easily positioned, but the shield case may be deformed beyond its elastic limit when large external force acts on the barrel
Solution Approach 1:
The support structure is divided into two functional parts: a shield case for positioning and a support structure for force absorption. This segmentation allows each component to specialize in its function without compromising the other.
Solution Approach 2:
The support structure acts as an intermediary between the shield case and the barrel member, absorbing external forces before they reach the shield case. This mediator prevents force transmission that would cause deformation.
2Device complexity
If the shield case is deformed beyond its elastic limit, then the barrel member position accuracy is reduced, but this leads to significant reduction in camera image quality
Solution Approach 1:
The support structure provides beforehand cushioning by absorbing external forces before they can deform the shield case beyond its elastic limit, thereby maintaining position accuracy without requiring complex compensation mechanisms.
3Reliability
If the control portion is added to control the approach of the barrel member, then the durability against external force is improved, but the device complexity increases
Solution Approach 1:
The control portion utilizes elastic deformation of thin-walled structures to achieve force absorption and position control. This approach provides the needed functionality without requiring complex mechanical systems with multiple moving parts.
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 camera module enhances durability against external forces, maintaining image quality by stabilizing the barrel member's position within the housing, preventing deformation beyond the elastic limit and ensuring accurate image capture.
Implementation Method 1
The control portion is arranged between the peripheral wall portion and an inner peripheral surface of the first case and controls approach of the barrel member to the second case. The control portion may be an elastic part that is formed of a portion of the peripheral wall portion and presses the inner peripheral surface of the first case.
Implementation Method 2
The first case may be made of a synthetic resin material that has absorptive properties with respect to laser light of a specified wavelength, and the second case may be made of a synthetic resin material that has transmissive properties with respect to the laser light.
Data Source
AI summary
A camera module according to an embodiment of the present technology includes a housing that includes a first case that includes an opening at one of ends of the first case, and a second case that is joined to another of the ends of the first case; a barrel member that is arranged in the housing and includes a barrel that is fitted into the opening in an optical-axis direction; a sensor board that is arranged in the housing and includes an imaging device that faces the barrel; and a support that includes a peripheral wall portion and a control portion, and is arranged between the barrel member and the second case, the peripheral wall portion including a first end and a second end and covering around the imaging device, the first end supporting the barrel member, and the second end being brought into elastic contact with the second case.