Leather Shoulder Strap Dynamic Length Adjustment Mechanism
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Solution Overview
Problem
Existing shoulder straps for leather goods, such as bags and briefcases, lack simplicity and convenience in adjusting length and securing the item to a support, leading to potential swinging or falling when used with luggage or other supports.
Innovation Solution
A shoulder strap design featuring a first section with a hooking tab and a second section with a foldable loop, allowing for quick length adjustment by folding the first section back on itself and engaging a hooking rod into the loop, providing a secure, tight configuration when used with supports like suitcases.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the shoulder strap is made with a fixed length, then the structure is simple, but the adaptability to different carrying needs is poor
Solution Approach 1:
The shoulder strap incorporates a dynamic length adjustment mechanism where the first section of ribbon can be folded back onto itself and secured by a hooking rod. This allows the strap to transition between different lengths (full length when unfolded, reduced length when folded) without requiring multiple separate straps or complex adjustment mechanisms. The hooking tab and rod system provides a simple yet effective way to lock the folded configuration.
2Ease of operation
If the shoulder strap uses a complex adjustment mechanism, then the length adjustability is precise, but the ease of operation is reduced
Solution Approach 1:
The adjustment mechanism is designed to be operated by the user without requiring additional tools or complex procedures. The hooking rod can be easily inserted into the hooking tab to secure the folded first section, and removed when adjustment is needed. The design relies on simple manual manipulation of the folding and hooking actions, making it intuitive and easy to use while maintaining structural simplicity.
3Reliability
If the shoulder strap is securely attached to the support, then the reliability of mounting is high, but the ease of operation for mounting/dismounting is reduced
Solution Approach 1:
The shoulder strap attachment system is divided into separate functional components: the first end with attachment piece and hooking piece for securing to the leather goods, and the ability to fold and hook the first section for securing to the support. This segmentation allows independent operation of attachment and mounting functions, enabling secure fastening through simple discrete actions rather than requiring complex integrated mechanisms.
Data Source
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AI summary
The invention relates to a shoulder strap (1) for a leather goods item, having a determined length (L1) and delimited between a first end (3) and a second end (4) opposite the first end, a first section of ribbon (5) extending from the first end, a second section of ribbon (6) extending from the second end, and a first buckle (13) having a closed frame (14) to which are attached, on one side the first section of ribbon, opposite the first end, and on the opposite side the second section of ribbon, opposite the second end,characterized in that the first section of ribbon is provided with a hook tab (12) at the first end and the first loop further comprises an open frame (15) defining a hook pin (40) configured to engage with the hook tab in a so-called tight configuration of the shoulder strap in which the latter has a usable length (L3) less than its determined length, with the first section of ribbon which is at least partially folded back on itself.