Wrist Device Spring-Bar Exterior Attachment Without Visible Screw Holes
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Solution Overview
Problem
Existing wrist devices, such as watches, face design constraints due to the use of screws for securing exteriors like bezels to the case, which increases the number of parts and requires additional space for screw holes, affecting appearance and design flexibility.
Innovation Solution
A wrist device design that uses a spring bar to connect the case and exterior through communicating through holes, eliminating the need for separate screw fastening, and allowing for a more secure and aesthetically pleasing attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If screws are used to secure the exterior to the case, then the exterior is firmly attached, but the number of parts increases and design flexibility is reduced
Solution Approach 1:
The patent combines the exterior and case into a single integrated structure, eliminating the need for separate attachment components like screws. The exterior is formed as an integral part of the case, reducing the number of parts while maintaining structural strength through continuous material formation.
Solution Approach 2:
The case structure is designed to serve multiple functions: it provides structural support, housing for internal components, and integrated attachment for the exterior. This multi-functionality eliminates the need for dedicated fastening components, reducing part count while maintaining secure attachment.
2Strength
If screws are used to secure the exterior to the case, then the exterior is firmly attached, but visible screw holes affect the appearance
Solution Approach 1:
By merging the exterior and case into an integrated structure, the patent eliminates visible screw holes and fastening points. The continuous surface formed by integral construction provides a clean, seamless appearance while maintaining secure attachment through the unified structure.
3Strength
If screws are used to secure the exterior to the case, then the exterior is firmly attached, but additional space for screw holes is required
Solution Approach 1:
The patent merges the exterior attachment function into the case structure itself, eliminating the need for separate screw holes. The integrated design utilizes the existing case geometry for attachment, reducing the additional space required for fastening components.
4Device complexity
If a spring bar is used to connect the case and exterior, then the number of parts is reduced, but the attachment security must be maintained
Solution Approach 1:
The patent merges the attachment function into the integral case structure, eliminating the need for separate spring bars or fastening components. The unified construction provides inherent structural security while reducing part count.
Data Source
AI summary
Disclosed is a wrist device including: a case that includes a band attachment having a first through hole formed therein; an exterior that covers at least a portion of an upper surface side of the case and includes a connector having a second through hole formed therein that communicates with the first through hole in an assembled state in which the exterior is attached to the case; a spring bar that passes through the first through hole and the second through hole, which are in a communicating state, from one side to the other side and has protruding ends protruding to the one side and the other side; and a case attachment on a band side having engagement holes for receiving the respective protruding ends of the spring bar.