Composite Battery Cover Structure for Camera Sealing Stability
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Solution Overview
Problem
Conventional PU battery covers in electronic devices suffer from poor sealing performance, high risk of degumming, and increased cost due to the need for additional decoration rings.
Innovation Solution
A battery cover design with a stacked structure of polyurethane and glass fiber layers, where the camera assembly's decoration member is divided into outer and inner portions, adhered to a glass fiber layer, enhancing adhesion and eliminating the need for decoration rings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional PU battery cover assembly manner is used, then the appearance and hand feeling are good, but the sealing performance is poor and the cost is high
Solution Approach 1:
The battery cover adopts a composite structure with a glass fiber layer and a polyurethane layer. The glass fiber layer provides structural strength and adhesion for the decoration member, while the polyurethane layer provides appearance quality and hand feeling. This composite material approach improves sealing performance by ensuring stable adhesion of the decoration member to the battery cover, eliminating the need for additional sealing measures.
2Reliability
If a traditional PU battery cover assembly manner is used, then the assembly is simple, but the PU battery cover is prone to degumming when subjected to external force
Solution Approach 1:
The glass fiber layer serves as an adhesive base layer that provides strong bonding between the decoration member and the polyurethane battery cover. When external force is applied, the glass fiber layer prevents the decoration member from detaching (degumming) by providing a stable adhesion interface, thereby improving reliability without significantly increasing assembly complexity.
Solution Approach 2:
The glass fiber layer is specifically positioned at the adhesion interface between the decoration member and the battery cover, providing localized reinforcement and improved bonding strength only where needed. This allows the rest of the battery cover to maintain its simple polyurethane structure, balancing reliability improvement with structural simplicity.
3Reliability
If a decoration ring is added to improve adhesion, then the adhesion stability is improved, but the cost increases and the device complexity increases
Solution Approach 1:
The glass fiber layer is integrated directly into the battery cover structure, merging the adhesion function with the battery cover itself. The decoration member is adhered directly to the glass fiber layer on the battery cover, eliminating the need for a separate decoration ring component. This integration maintains adhesion stability while reducing device complexity and cost.
Data Source
AI summary
This application discloses an electronic device. A battery cover includes a first cover layer and a second cover layer that are arranged in a stacked manner, and the first cover layer is located on an outer side of the second cover layer, where the first cover layer is made of a polyurethane material, and the second cover layer is made of a glass fiber material. The camera assembly includes a decoration member, the decoration member includes a first decoration portion and a second decoration portion, the first decoration portion is located on an outer side of the battery cover and is adhered to the second cover layer, and the second decoration portion is located on an inner side of the battery cover and is adhered to the second cover layer, where the first decoration portion partially covers the first cover layer.