Smartwatch Back Cover Laser Bonding for Thin Waterproof Assembly
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Solution Overview
Problem
Current smart watch designs face challenges in achieving high waterproof performance while maintaining a thin profile, as traditional designs with waterproof rings and screws compromise aesthetics and increase thickness.
Innovation Solution
A watch assembly method using laser adhesive layers on the middle frame and back cover, activated through heating or laser irradiation, eliminates the need for screws and waterproof rings, ensuring a stable and sealed connection without compromising thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional waterproof ring and screw design is used, then waterproof performance is improved, but watch thickness increases and aesthetics deteriorate
Solution Approach 1:
The patent removes the traditional waterproof ring and screw components from the watch assembly, replacing them with a bonding structure that integrates the back cover directly to the case body, eliminating the need for separate sealing elements and fastening hardware
Solution Approach 2:
The bonding structure merges the functions of sealing, fastening, and structural connection into a single integrated solution, combining the adhesive layer and bonding surface to achieve both waterproofing and mechanical attachment without separate components
2Reliability
If traditional waterproof ring and screw design is used, then waterproof performance is improved, but aesthetic appearance deteriorates
Solution Approach 1:
The patent removes the visible screws and waterproof ring components that mar the aesthetic appearance, replacing them with a seamless bonding structure that maintains a clean, uninterrupted surface on the watch back
Solution Approach 2:
The bonding structure merges the functional elements into an integrated solution that is either hidden or aesthetically integrated, eliminating the visual disruption caused by separate sealing rings and fastening screws
3Device complexity
If laser adhesive layers are used for bonding, then device complexity is reduced, but bonding strength must be maintained
Solution Approach 1:
The patent replaces the mechanical screw-fastening system with a chemical bonding system using laser adhesive layers, eliminating the need for threaded holes, fastening hardware, and associated mechanical assembly/disassembly processes
Solution Approach 2:
The patent utilizes changes in the physical and chemical parameters of the adhesive material through laser activation, transforming the adhesive from a non-curing state to a bonded state through controlled heating and chemical reaction
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 method achieves excellent waterproof performance up to 5ATM without the need for screws or rings, enhancing the watch's aesthetics and reducing thickness, while allowing for bonding of various materials and special-shaped surfaces.
Implementation Method 1
activating the first laser adhesive layer; activating the second laser adhesive layer
Implementation Method 2
activated through heating or laser irradiation
Implementation Method 3
a good waterproof effect can be realized due to the high viscosity of the laser adhesive layer
Data Source
Figure 1~2
Figure 3~5
Figure 6~8
AI summary
A watch assembly method includes: processing a first bonding surface (13) on a first connecting member (1), bonding a first laser adhesive layer (4) on the first bonding surface (13) and activating the first laser adhesive layer (4); processing a second bonding surface (22) on a second connecting member (2), bonding a second laser adhesive layer (5) on the second bonding surface (22) and activating the second laser adhesive layer (5); fixing the second connecting member (2) with the first connecting member (1) preliminarily in such a manner that the first laser adhesive layer (4) and the second laser adhesive layer (5) face each other, and pressing the first connecting member (1) and the second connecting member (2) against each other until the first laser adhesive layer (4) and the second laser adhesive layer (5) are completely bonded and infiltrated.