Ratcheting Watch Strap Buckle for Incremental Fit Adjustment
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Solution Overview
Problem
There has been little innovation concerning the fitment and ease of adjustment of watch bands, particularly in terms of limited discrete fitment settings and ease of adjustment in modern wristwatches.
Innovation Solution
A wristwatch with a ratcheting buckle and strap mechanism that allows incremental adjustment via a ratcheting mechanism between the buckle and strap, utilizing a cam-lever and linkage element to enable one-directional or bi-directional translation of the strap depending on the cam-lever's configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional watch strap with fixed holes is used, then the strap structure is simple, but the fitment adjustment is limited and not easy to modify
Solution Approach 1:
The patent applies the dynamics principle by implementing a ratcheting mechanism that allows the strap to be dynamically adjusted to different positions. The ratcheting buckle enables one-way movement of the strap through engagement and disengagement of teeth, allowing users to easily adjust the fitment by pulling the strap to the desired position and locking it in place, transforming a static strap system into a dynamically adjustable one.
Solution Approach 2:
The ratcheting mechanism embodies the self-service principle by enabling users to adjust the strap themselves without requiring tools or assistance. The mechanism automatically locks the strap at the selected position through the ratcheting action, allowing the user to independently control and modify the fitment according to their needs.
2Ease of operation
If a ratcheting mechanism is added to enable incremental adjustment, then the ease of adjustment is improved, but the device complexity increases
Solution Approach 1:
The ratcheting mechanism is segmented into distinct functional components: the ratcheting buckle with teeth, the engagement lever, and the strap with corresponding features. This segmentation allows each component to perform its specific function independently while working together as an integrated system, making the complex mechanism easier to manufacture, assemble, and maintain.
Solution Approach 2:
The engagement lever acts as an intermediary element between the user's manual input and the ratcheting teeth. By manipulating the lever, the user indirectly controls the engagement and disengagement of the teeth, providing a mechanical advantage and ergonomic interface that simplifies the adjustment operation while managing the inherent complexity of the ratcheting mechanism.
3Manufacturing precision
If the strap allows continuous adjustment, then the fitment precision is improved, but the mechanism becomes more complex and less reliable
Solution Approach 1:
The ratcheting mechanism provides dynamic adjustability within a controlled framework. The strap can be adjusted incrementally by engaging the ratchet at different tooth positions, offering multiple discrete fitment options that balance precision with mechanical simplicity and reliability.
Data Source
AI summary
A watchstrap is provided with a novel ratcheting buckle and strap, whereby the user may incrementally adjust fitment of a corresponding watch via a ratcheting mechanism embodied between the ratcheting buckle and strap. The strap includes a first strap portion and a second strap portion. The first strap portion has a linear rack and a plurality of teeth embedded in the linear rack. The second strap portion is coupled to a buckle wherein the buckle is configured to slideably engage with one or more of the plurality of teeth as the first strap portion is inserted through the buckle and translated therethrough. Terminal ends of both the first strap portion and the second strap portion are each configured to couple to the corresponding watch.