High-Hardness Screen Protector Cutting for Burr-Free Attachment
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Solution Overview
Problem
Conventional cutters struggle to cut screen protectors with a hardness greater than 3H, leading to issues like burrs and scratches, and inventory management challenges for manufacturers due to the need for various shapes and sizes to fit different mobile devices.
Innovation Solution
A cutting and attaching system comprising a cutting apparatus with a specifically designed cutter and a universal sheet, featuring a unique cutting edge geometry and layered structure, allows for precise cutting of screen protectors with at least 5H hardness without burrs or scratches, and includes a film applicator for accurate attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional cutter is used to cut a hardened screen protector (hardness ≥5H), then the cutting process can be performed, but the screen protector develops burrs or a scratchy structure after cutting
Solution Approach 1:
The patent changes the geometric parameters of the cutter by introducing a slanting angle (1°-3°) and a primary cutting edge angle (43°-47°) relative to the transversal reference plane. These specific parameter ranges enable the cutter to effectively cut hardened screen protectors (≥5H) while producing burr-free, smooth edges, resolving the contradiction between cutting capability and surface quality
Solution Approach 2:
The patent applies local quality by creating a primary cutting edge with specific geometric properties (slanting angle and angle relative to transversal reference plane) that are optimized for cutting hardened materials. This localized geometric feature at the cutting edge enables precise control over the cutting process, achieving both effective cutting and high surface quality
2Adaptability or versatility
If manufacturers inventory screen protectors in various shapes and sizes to fit different mobile apparatuses, then all device requirements can be met, but inventory costs greatly increase
Solution Approach 1:
The patent implements universality by providing a universal sheet with a standardized large-size design that can be cut into different shapes and sizes to fit various mobile apparatuses. The standardized universal sheet serves multiple device types, eliminating the need to maintain separate inventories for each device shape and size, thus reducing inventory costs while maintaining device compatibility
Solution Approach 2:
The patent applies segmentation by enabling the universal sheet to be divided into different shapes and sizes through precise cutting along device-specific contours. This allows a single universal sheet to be segmented into multiple custom shapes to fit different devices, providing versatility without requiring separate inventory items for each device type
Data Source
AI summary
A cutting and attaching system for a screen protector having a high hardness is provided, and includes a cutting apparatus, a universal sheet having a hardness of at least 5H, and a film applicator. The cutting apparatus can perform a cutting process to the universal sheet through a cutter thereof according to the film applicator and a mobile apparatus, thereby forming a screen protector that is suitable to be applied to the film applicator and the mobile apparatus.