Expandable Watch Strap With Loop Stop Surface
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Solution Overview
Problem
Traditional watch straps face limitations in adjustment range, ease of use, and durability, particularly failing to accommodate diverse user morphologies and handling conditions such as wearing gloves or withstanding strong accelerations.
Innovation Solution
A watch strap design featuring an extensible strand with a loop that can surround a watch case, utilizing stop surfaces for secure attachment and adjustable tensile force, allowing for easy donning and removal without a traditional clasp, and incorporating elastic or rigid elements for flexibility and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional clasps (pin buckles or folding clasp mechanisms) are used, then secure attachment is achieved, but ease of operation deteriorates due to delicate handling requirements and inability to use with gloves
Solution Approach 1:
The patent removes the traditional clasp mechanism entirely from the watch bracelet system. Instead of using pin buckles or folding clasps, the invention employs a simple loop that passes through the watch case and secures with a stop surface, eliminating complex clasping mechanisms that require delicate handling.
Solution Approach 2:
Rather than using a clasp that closes around the watch case, the invention inverts the approach by using a loop that passes through the watch case from the back, with the stop surface preventing removal. This reversal simplifies the operation to a single pulling motion that works even with gloves on.
2Reliability
If traditional clasps are used, then secure attachment is achieved, but device complexity increases due to multiple components and assembly steps
Solution Approach 1:
The patent extracts and removes the entire traditional clasp mechanism (pin buckles, folding clasps, multiple links) from the watch bracelet system. The replacement is a simple loop with a stop surface that integrates directly with the watch case, dramatically reducing component count and assembly complexity.
Solution Approach 2:
The invention merges the functions of the clasp, anchor point, and adjustment mechanism into a single integrated loop structure that works with the watch case. The stop surface on the loop cooperates directly with the watch case geometry, eliminating the need for separate clasp components and simplifying the overall system.
3Ease of operation
If bracelets are made entirely of elastic material, then ease of operation improves, but reliability deteriorates under strong accelerations
Solution Approach 1:
The patent employs a composite construction where the bracelet combines elastic material segments with rigid structural elements. The elastic portions provide flexibility and ease of operation, while the rigid loop with stop surface and watch case integration provide reliable anchoring that resists strong accelerations and maintains secure hold.
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
The design provides a wide adjustment range, ease of use, and enhanced durability, ensuring a secure fit during wear, even under strong accelerations, and is suitable for both professional and sports use, while being glove-friendly and cost-effective.
Implementation Method 1
at least one extensible strand (4)
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
Bracelet (3) comprising an extendable strap (4). This bracelet (3) comprises a buckle (5) arranged to encircle a case (2) or a projecting element of said bracelet (3), formed by said extendable strap (4) or by an added buckle (59), and said buckle (5) comprising a stop surface (50) arranged to cooperate, in an engaged position, with either a first complementary stop surface (20) of said case (2), or with a second complementary stop surface (30) of said projecting element of said bracelet (3). Watch (1) comprising, attached to a case (2), such a bracelet (3), of which said buckle (5) is arranged to cooperate with said case (2).