Windshield-Mounted Onboard Device Attachment for Curved Glass
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Solution Overview
Problem
Conventional onboard devices attached to vehicle windshields using thick double-sided adhesive tapes face issues with high costs, reduced attachment strength due to uneven tape compression, and difficulty in detachment due to strong adhesion, along with air bubbles forming during attachment.
Innovation Solution
An onboard device with a support member featuring a base with a curved attachment surface and slits in the adhesive tape that allows for conforming to the windshield's curvature, reducing tape thickness and facilitating even adhesion while enabling easy detachment by providing guide parts for tool insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If thick double-sided adhesive tape is used to attach the onboard device to the curved windshield, then the attachment can accommodate the curvature difference, but the cost increases and air bubbles remain on the stuck surface
Solution Approach 1:
The base is designed with a curved attachment surface that matches the curvature of the windshield inner surface. This allows the adhesive tape to be applied evenly without excessive thickness, accommodating the curvature difference while avoiding air bubble formation and reducing material usage
Solution Approach 2:
The attachment surface of the base is specifically designed with different curvature characteristics in different regions to match the local curvature of the windshield. This localized curvature matching allows for thinner adhesive tape application while maintaining proper adhesion across the entire attachment area
2Ease of manufacture
If the stuck area of the projection is decreased to enable attachment without being influenced by the curve, then the attachment becomes easier, but the adhesive strength with respect to moment decreases
Solution Approach 1:
The base is designed with a curved attachment surface that matches the windshield curvature, allowing the full area of the base to be effectively utilized for adhesion. This curvature matching enables both large stuck area for strength and ease of attachment without being influenced by curve complications
3Ease of repair
If the double-sided adhesive tape is removed from the windshield for detachment, then the onboard device can be replaced, but the strong adhesion makes it difficult to force the screwdriver into the stuck part
Solution Approach 1:
The base is designed with separation parts that create gaps between the adhesive tape and the windshield surface. These gaps allow detachment tools to be easily inserted between the tape and glass, enabling simple removal of the adhesive tape for device replacement while maintaining strong adhesion during normal use
4Ease of repair
If a flathead screwdriver is forced into the stuck part to remove the adhesive tape, then the device can be detached, but the strong adhesion without gaps impedes easy detachment
Solution Approach 1:
The base includes separation parts that segment the adhesive tape structure, creating intentional gaps between the tape and windshield. These gaps provide easy access points for detachment tools without requiring forceful insertion, while the overall structure maintains strong adhesion during normal operation
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 configuration enhances attachment strength, reduces costs, and minimizes air bubbles, ensuring stable fixation and easy removal without compromising adhesive force.
Implementation Method 1
a double-sided adhesive tape prepared to be stuck on the base
Data Source
AI summary
An onboard device includes a body member, a support member projecting from the body member and including a base to be attached to a concave inner surface of a glass member having a curved shape provided in a vehicle, and a double-sided adhesive tape stuck on a the base. The base is a plate-like member including an attachment surface to be opposed to the inner surface of the glass member. The attachment surface is a curved surface having a curvature at least in a first direction along the attachment surface. The double-sided adhesive tape is provided with at least one first slit open toward an upper edge located on the upper side and cut downward and at least one second slit open toward a lower edge located on the lower side and cut upward when the base (3) is attached to the inner surface.