Watch Clasp Sliding Holder for Millimeter-Level Strap Adjustment
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Solution Overview
Problem
Existing watch clasps require special tools for adjusting strap length, making it inconvenient to achieve millimeter-level fine adjustments, especially during activities like sports when wrist size changes.
Innovation Solution
A watch clasp design featuring a sliding holder, stop spring bar, unlock module, and elastic fine-adjusting assembly that allows for millimeter-level adjustments without tools, using a sliding stop module and extension latch assembly to adjust strap length and tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a special-purpose tool is used to adjust the quantity of balls in a steel watch strap, then the length adjustment can be achieved, but the adjustment process becomes inconvenient and cannot be performed whenever and wherever possible
Solution Approach 1:
The watch strap adjustment mechanism is designed to be self-service, allowing the user to adjust the length directly without requiring external special-purpose tools. The sliding holder with engaging teeth and stopper members enables the user to perform the adjustment by simply sliding the holder along the strap
Solution Approach 2:
The adjustment function is extracted from the traditional ball-removal method and reimagined as a sliding mechanism. The sliding holder can be removed from the clasp case and slid along the strap to engage different teeth, effectively taking out the need for tool-based ball removal
2Measurement precision
If the quantity of balls in a watch strap is adjusted by increasing or reducing balls, then the length can be changed, but millimeter-level fine adjustment cannot be achieved due to the relatively large width of each ball (at least 3 mm)
Solution Approach 1:
The strap length adjustment is segmented into fine increments by using multiple engaging teeth along the sliding path. Instead of large ball units, the teeth are spaced to provide millimeter-level segmentation, allowing precise control of the adjustment increment
Solution Approach 2:
The sliding holder provides dynamic adjustment capability, allowing continuous sliding along the strap to engage different teeth at different positions. This dynamic mechanism enables fine-tuning of the length to achieve millimeter-level precision
3Measurement precision
If a watch strap length adjustment mechanism is designed with multiple components (sliding holder, stop spring bar, unlock module), then fine adjustment capability is achieved, but the device complexity increases
Solution Approach 1:
Multiple functions are merged into integrated components. The sliding holder combines the sliding mechanism, engaging teeth, and interaction with stopper members into a single unit. The stop spring bar integrates both stopping and releasing functions, reducing the need for separate components
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
Enables convenient, tool-free millimeter-level fine adjustments of watch strap length and tightness, ensuring comfortable wear during changing wrist sizes, such as during sports.
Implementation Method 1
a stop spring bar 103, fixed to the watch clasp case 101
Implementation Method 2
an elastic fine-adjusting assembly 107
Data Source
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AI summary
Embodiments of this application disclose a watch clasp capable of finely adjusting a watch strap length, to adjust tightness of wearing of a watch strap whenever and wherever possible. The watch clasp capable of finely adjusting a watch strap length in the embodiments of this application includes: a watch clasp sliding holder 102, located on a back surface of a watch clasp case 101; a sliding stop module 104, fixing the watch clasp sliding holder 102 to the back surface of the watch clasp case 101 through engagement, where the sliding holder 102 can slide between the watch clasp case 101 and the sliding stop module 104; a stop spring bar 103, fixed to the watch clasp case 101, and an unlock module 105, fixed to the watch clasp case 101, where the unlock module 105 is engaged with the sliding stop module 104, and the stop spring bar 103 and the unlock module 105 are respectively located on two sides of the sliding stop module 104; and an extension latch assembly, where one end of the extension latch assembly 106 is fixed to the watch clasp case 101, and the other end of the extension latch assembly 106 is fixed to an elastic fine-adjusting assembly 107.