Deformable Watch Case with Slit Side Plates for Shock Stress Dispersion
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Solution Overview
Problem
Existing shield cases for electronic devices, such as wristwatches, concentrate stress on the top plate during shock events due to the deformation caused by slit sections on the side plates, leading to potential damage.
Innovation Solution
A case design featuring a deformable exterior member with a separation section, including a slit and switch insertion hole, allows the exterior case to displace circumferentially, dispersing shock stress and preventing damage by maintaining gaps between components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If slit sections are provided on side plates to enable flexural deformation during shock, then shock mitigation is improved, but stress concentration on the top plate increases leading to potential damage
Solution Approach 1:
The side plates are divided into multiple slit sections that can independently deform during shock events. This segmentation allows the structure to absorb impact energy through controlled flexing of individual slit sections rather than transmitting force uniformly to the top plate, thereby mitigating shock while distributing stress more effectively
Solution Approach 2:
The slit sections are strategically positioned and dimensioned to create localized flexibility zones in the side plates. These local flexible regions enable the side plates to deform preferentially at the slit sections during shock, protecting the top plate from stress concentration by confining deformation to specific areas rather than propagating stress across the entire structure
2Reliability
If the exterior member is made deformable in circumferential direction to disperse shock stress, then shock resistance is improved, but structural integrity may be compromised
Solution Approach 1:
The exterior member transitions from a static rigid structure to a dynamic deformable structure that can adapt its shape during shock events. The circumferential deformation capability allows the exterior member to absorb impact energy through controlled shape changes, while the separation section provides a defined deformation path that prevents uncontrolled structural failure
Solution Approach 2:
The separation section acts as an intermediary element that mediates between the need for shock absorption and structural integrity. It provides a controlled weak point that allows circumferential deformation to occur in a predetermined manner, dispersing shock stress while maintaining overall structural coherence and preventing catastrophic failure
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 design effectively mitigates shock-induced stress, preventing damage to the exterior case and associated components like the band and push-button switches, while maintaining the exterior case's integrity and appearance.
Implementation Method 1
the exterior case is provided with a separation section for separating the exterior case in the circumferential direction thereof, so that the exterior case can be displaced in the circumferential direction by being subjected to a shock
Implementation Method 2
generation of stress due to the shock can be dispersed, whereby the shock to which the exterior case has been subjected can be mitigated
Data Source
AI summary
A case including a case body, and an exterior member which is arranged on an outer periphery of the case body in a manner to be deformable in a circumferential direction and which is provided with a separation section for separating at least a part of the case body in the circumferential direction.