In-vehicle Camera Lens Protrusion for Windshield Mounting Stability
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Solution Overview
Problem
Conventional in-vehicle cameras require a large hood and a significant surface area on the windshield for attachment, which can lead to a long hood extension and stability issues, especially when the windshield inclination is high, resulting in increased size and complexity.
Innovation Solution
An in-vehicle camera design featuring a bracket with an attachment portion and a mounting portion, where the camera body has a facing portion, a projection portion with a lens, and a light-blocking portion, along with a first cut-out portion above the projection portion, allowing the lens to be positioned close to the windshield and reducing the hood length while maintaining a stable attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bracket attachment area on the windshield is increased to improve stability, then the mounting stability is improved, but the available surface area on the windshield is reduced
Solution Approach 1:
The bracket extends in the depth direction (perpendicular to the windshield) to provide mounting stability, rather than requiring a larger area on the windshield surface. The support portion protrudes toward the camera body, creating a three-dimensional mounting structure that achieves stability without consuming excessive windshield surface area.
2Object-affected harmful factors
If the hood extension length is increased to prevent light intrusion, then the light-blocking effectiveness is improved, but the device size and complexity increase
Solution Approach 1:
The light-blocking portion is integrated with the support portion of the bracket, forming a combined structure that provides both mechanical support and optical shielding. This merging eliminates the need for a separate, complex hood structure while achieving effective light intrusion prevention.
Solution Approach 2:
The light-blocking portion acts as an intermediary element between the bracket and the camera body, preventing light intrusion into the optical path without requiring the bracket itself to be complex. This mediator structure simplifies the overall design by providing a dedicated, simple light-blocking function.
3Area of moving object
If the projection portion extends upward to position the lens closer to the windshield, then the field of view is improved, but the risk of light intrusion increases
Solution Approach 1:
The light-blocking portion is positioned between the projection portion and the windshield to prevent light intrusion while allowing the lens in the projection portion to maintain its close proximity to the windshield for an expanded field of view. The light-blocking portion serves as a mediator that enables both benefits simultaneously.
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 design secures a large attachment area on the windshield, shortens the hood length, and provides a stable mounting structure without obstructing the field of view, improving the camera's mountability and preventing light intrusion while maintaining driver visibility.
Implementation Method 1
the light-blocking portion forming an inhibition space including at least a defined space defined by an angle of field of the in-vehicle camera body through the lens in a space between the lens and the windshield, the light-blocking portion configured to block light from the outside of the inhibition space to the inside of the inhibition space
Data Source
AI summary
A vehicle-mounted camera has a lens disposed on a protruding part, which protrudes from the upper surface of a vehicle-mounted camera body; thus, compared to the situation in which the entire vehicle-mounted camera body is positioned below a bracket, the lens can be positioned at the shortest distance from a windshield, thereby enabling the length of a hood to be reduced. Furthermore, the in-vehicle camera is able to take up a large area of the portion of the bracket affixed to the windshield.