Electronic Cover Engagement Structure for Stable Detachment Force
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Solution Overview
Problem
Conventional covers for electronic devices, such as scientific calculators, face challenges in adjusting the ease of removal from the device main body, leading to instability and difficulty in detachment due to inconsistent gap sizes and elastic deformation, which can result in unstable engagement forces.
Innovation Solution
The design includes a cover with extending parts and engaging parts that form gaps of specific dimensions to allow for controlled elastic deformation, ensuring consistent engagement forces and stable attachment regardless of the cover's orientation, maintaining equal ease of removal whether attached to the front or back side.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the cover is pressed at its center toward the electronic device main body to detach the engaging part, then the engaging part is moved outward, but the ease of detachment becomes difficult to adjust appropriately due to inconsistent gap sizes
Solution Approach 1:
The cover is divided into multiple regions with different gap sizes: a first gap at the center portion and a second gap at the end portion. This segmentation allows the center region to provide ease of detachment while the end region maintains stable engagement, resolving the contradiction between easy removal and reliable attachment.
Solution Approach 2:
Different portions of the cover are designed with different gap characteristics: the center portion has a first gap size optimized for detachment ease, while the end portion has a second gap size optimized for engagement stability. This local differentiation allows each region to fulfill its specific function, solving the contradiction between ease of operation and reliability.
2Ease of operation
If the gap between the electronic device main body and the cover is not appropriate, then it is difficult to appropriately adjust the ease of removal of the cover
Solution Approach 1:
The gap between the cover and main body is segmented into different regions with different sizes. The first gap at the center and the second gap at the end portion are designed with different dimensions, allowing the cover to be removed easily from the center while maintaining stable engagement at the ends, thus simplifying the overall design without requiring complex adjustment mechanisms.
3Ease of operation
If the cover is elastically deformed during detachment, then the engaging part is moved outward, but the deformation may change the ease of detachment inconsistently
Solution Approach 1:
The cover structure implements local quality by designing different gap sizes at different locations. The center portion with the first gap allows controlled elastic deformation for easy detachment, while the end portion with the second gap maintains consistent engagement, reducing the need for high manufacturing precision across the entire cover.
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
The solution stabilizes the engagement force and ensures consistent ease of removal, preventing unintended detachment and protecting the device from accidental removal during use, while maintaining a compact design.
Implementation Method 1
the cover is pressed at its center in the vertical direction toward the electronic device main body and is elastically deformed so that the engaging part of the cover is moved outward
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
An electronic device (100) includes: an electronic device main body (10); and a cover (20). The main body (10) includes a stopper (15a) on lateral faces at both ends in a longitudinal direction. The cover includes an engaging part (22) that engages with the stopper in a first state where there is a gap between the cover and the main body at a central part in the longitudinal direction. The gap is formed such that a front-side attachment engagement amount which is an engagement amount (H2) of the engaging part and the stopper when the cover is attached onto the front side of the main body in a second state where the cover is elastically deformed to contact the main body and a backside attachment engagement amount which is an engagement amount (H2) when the cover is attached onto the back side in the second state are substantially equal.