Dual Magnetic Shield Components for See-Through Timepiece
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Solution Overview
Problem
Existing timepiece designs with magnetic shield plates formed by bending a single plate member can result in visible wrinkles or cracks, compromising the appearance quality, especially when applied to timepieces with see-through structures.
Innovation Solution
A timepiece configuration featuring a cylindrical case with a transmissive case back and dual magnetic shield components, where the first magnetic shield component covers the case back side and the second component covers the side surface, overlapping and in contact with each other to form a continuous magnetic shield path without air layers, hiding any processing defects and enhancing magnetic shielding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a magnetic shield plate is formed by bending a single plate member, then magnetic shielding performance is improved, but wrinkles or cracks occur in processed portions deteriorating appearance quality
Solution Approach 1:
The magnetic shield plate is divided into multiple separate members (first magnetic shield member and second magnetic shield member) instead of using a single bent plate. This segmentation eliminates the need for bending processing that causes wrinkles and cracks, while maintaining comprehensive magnetic field shielding coverage through the coordinated arrangement of multiple members.
2Area of stationary object
If a single plate member is bent to form the magnetic shield plate, then magnetic shielding coverage is improved, but the plate develops wrinkles or cracks reducing aesthetic appearance
Solution Approach 1:
Multiple magnetic shield members (first and second members) are combined together to form a complete magnetic shielding structure. The first magnetic shield member covers the upper side and one side surface, while the second member covers another side surface, and they are positioned adjacent to each other to provide comprehensive coverage without requiring any single member to be bent into complex shapes.
3Object-affected harmful factors
If a magnetic shield plate is used in a see-through timepiece, then magnetic shielding is provided, but the plate structure becomes visible through the case back reducing aesthetic quality
Solution Approach 1:
The magnetic shielding function is localized to specific areas where it is most needed (covering the motor and sensitive components), while using multiple smaller members instead of one large continuous plate. This allows the shielding to be effective where required while minimizing the visual impact through the transparent case back, as the multiple smaller members create less visible obstruction than a single large plate.
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 configuration effectively suppresses external magnetic field influence, maintains the aesthetic integrity of see-through timepieces by concealing potential defects in the magnetic shield components and enhances the compactness and magnetic shield performance of the timepiece.
Implementation Method 1
a first magnetic shield component covering at least a portion on the case back side of the timepiece component, and a second magnetic shield component covering at least a portion of a side surface of the timepiece component... effectively suppresses external magnetic field influence
Data Source
AI summary
A timepiece includes a case having a cylindrical shape, a case back including a transmissive region and covering one opening of the case, and a movement accommodated in the case, the movement including a timepiece component, a first magnetic shield component covering at least a portion on the case back side of the timepiece component, and a second magnetic shield component covering at least a portion of a side surface of the timepiece component. The first magnetic shield component includes an overlapping region overlapping the second magnetic shield component in plan view as viewed from a direction perpendicular to the case back, and the first magnetic shield component and the second magnetic shield component are disposed in contact with each other in the overlapping region.