Magnetic Wristlet Attachment Mechanism for Watch Cases
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Solution Overview
Problem
Existing watch wristlet attachment methods require skilled operation and multiple components, leading to complexity and potential breakage, as well as poor integration with watch cases, especially with openwork designs.
Innovation Solution
A wristlet attachment device featuring a support with a channel and pull-out piece held by magnets, allowing the bar to be securely held or released without tools, using a stainless steel design for durability and non-magnetic materials to prevent interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional piston-based attachment mechanism is used, then the wristlet can be securely attached to the watch case, but the device complexity increases and skilled operation is required
Solution Approach 1:
The patent replaces the traditional mechanical piston-based attachment system with a magnetic attachment mechanism. The bar contains magnetic elements that interact with corresponding magnetic elements in the support, enabling secure attachment through magnetic attraction rather than mechanical pistons. This substitution simplifies the device structure while maintaining secure attachment capability, eliminating the need for complex piston retraction and holding mechanisms.
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate components from the traditional attachment mechanism. By using direct magnetic attraction between the bar and support, the invention removes the need for pistons, springs, and complex housing structures, thereby reducing device complexity while preserving the essential attachment function.
2Reliability
If traditional piston-based attachment mechanism is used, then the wristlet can be attached to the watch case, but the ease of operation deteriorates due to requiring tools and skilled operation
Solution Approach 1:
The magnetic attachment mechanism allows for tool-free operation. The bar can be simply inserted into the support where magnetic attraction automatically secures it, and removal is achieved by overcoming the magnetic force, eliminating the need for specialized tools and skilled operation required by piston-based systems.
Solution Approach 2:
The magnetic attachment system is self-securing through magnetic attraction. When the bar is inserted into the support, the magnetic elements automatically engage and hold the components together without requiring external tools or skilled manipulation, making the operation intuitive and easy for users.
3Reliability
If traditional bar insertion method is used, then the wristlet can be attached to the horns, but the ease of operation worsens due to difficulty in finding the hole alignment
Solution Approach 1:
The magnetic attachment mechanism eliminates the need for precise hole alignment through traditional bar insertion. The bar with magnetic elements can be freely positioned within the support's recess, and the magnetic attraction automatically guides and secures the components together, removing the alignment difficulty entirely.
4Device complexity
If complex attaching mechanism with multiple parts is used, then the wristlet can be securely attached, but the reliability deteriorates due to increased risk of part breakage
Solution Approach 1:
The patent merges multiple separate components into integrated structures. The magnetic elements are embedded within the bar and support components rather than being separate parts, reducing the total number of components that could potentially break. The support integral with the wristlet strand and the magnetic elements integrated into the bar structure minimize the number of potential failure points.
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
Simplifies the attachment process, reduces component risk, and provides seamless integration with watch cases by using magnets to securely hold and release the wristlet, enhancing user experience and durability.
Implementation Method 1
a pair of magnets disposed on the support and the pull-out piece so as to hold the pull-out piece against the support and allow the pull-out piece to switch from a closed position wherein the bar is held in the channel to an open position wherein the bar is free
Data Source
AI summary
The invention relates to a device for attaching a wristlet strand to a watch case, the device being arranged to be attached to a bar, the wristlet strand being attached to the bar through attaching means. According to the invention, the attaching means are formed by a support integral with the wristlet strand, a pull-out piece arranged to cooperate with said support so as to close the support, the support comprising a channel capable of receiving the bar, and in that they comprise a pair of magnets disposed on the support and the pull-out piece so as to hold the pull-out piece against the support and allow the pull-out piece to switch from a closed position wherein the bar is held in the channel to an open position wherein the bar is free.