Smartwatch Laser Adhesive Assembly for Screwless Waterproof Sealing
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Solution Overview
Problem
Current smart watch designs require multiple pressing screws and a waterproof ring, which compromise aesthetics, increase thickness, and potentially affect waterproof performance.
Innovation Solution
A watch assembly method using laser adhesive layers on connecting members, activated through heating or laser irradiation, to achieve a secure and waterproof bond without screws or a waterproof ring, utilizing a special elastomer adhesive that softens and infiltrates for stable connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a waterproof ring and pressing screws are used to ensure waterproof performance, then waterproof reliability is improved, but device complexity and aesthetic quality deteriorate
Solution Approach 1:
The patent removes the traditional waterproof ring and pressing screws from the watch structure, extracting these separate components and replacing them with an integrated laser adhesive bonding system. This eliminates the need for additional waterproofing elements while maintaining sealing performance through direct bonding between the middle frame and back shell.
Solution Approach 2:
The patent combines the waterproofing function and bonding function into a single laser adhesive layer. The adhesive serves dual purposes: it bonds the middle frame and back shell together while simultaneously providing the waterproof seal, eliminating the need for separate waterproof ring and screw components.
2Reliability
If a waterproof ring and pressing screws are used to ensure waterproof performance, then waterproof reliability is improved, but the thickness of the watch increases
Solution Approach 1:
The patent extracts and removes the waterproof ring from the watch structure, eliminating its contribution to overall thickness. The pressing screws are also removed, eliminating the need for threaded holes and additional thickness from the screw heads and shafts protruding from the watch case.
3Strength
If multiple pressing screws are used to secure components, then bonding strength is improved, but aesthetics deteriorate due to exposed screws
Solution Approach 1:
The patent removes all pressing screws from the watch exterior, extracting this mechanical fastening element entirely. The aesthetic surface is preserved without any exposed screw heads or visible threaded holes, while the bonding strength is maintained through the laser adhesive system.
Solution Approach 2:
The patent replaces the mechanical screw-fastening system with a chemical bonding system using laser adhesive. This substitution eliminates the need for visible mechanical fasteners while providing equivalent or superior bonding strength through the adhesive layer between the middle frame and back shell.
4Reliability
If a waterproof ring is used for sealing, then waterproof performance is improved, but device complexity and thickness increase
Solution Approach 1:
The patent extracts and completely removes the waterproof ring from the watch assembly. The annular mounting groove and separate waterproof ring structure are eliminated, replacing them with a simplified direct bonding interface between the middle frame and back shell using laser adhesive.
Solution Approach 2:
The patent merges the sealing function previously performed by the waterproof ring into the laser adhesive bonding layer. The adhesive serves as both the bonding medium and the waterproof seal, eliminating the need for a separate ring structure and reducing overall device complexity.
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 enhances waterproof performance to 5 ATM without the need for screws or a waterproof ring, improving aesthetics and reducing watch thickness while ensuring reliable bonding and easy removal of the adhesive.
Implementation Method 1
bonding a first laser adhesive layer on the first bonding surface and activating the first laser adhesive layer; processing a second bonding surface on a second connecting member, bonding a second laser adhesive layer on the second bonding surface and activating the second laser adhesive layer
Implementation Method 2
activating the first laser adhesive layer; activating the second laser adhesive layer
Implementation Method 3
pressing the first connecting member and the second connecting member against each other until the first laser adhesive layer and the second laser adhesive layer are completely bonded and infiltrated
Data Source
AI summary
A watch assembly method includes: processing a first bonding surface on a first connecting member, bonding a first laser adhesive layer on the first bonding surface and activating the first laser adhesive layer; processing a second bonding surface on a second connecting member, bonding a second laser adhesive layer on the second bonding surface and activating the second laser adhesive layer; fixing the second connecting member with the first connecting member preliminarily in such a manner that the first laser adhesive layer and the second laser adhesive layer face each other, and pressing the first connecting member and the second connecting member against each other until the first laser adhesive layer and the second laser adhesive layer are completely bonded and infiltrated.