Brassiere Strap Adjustment Ring With Direct-Sewn Shoulder Strap
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Solution Overview
Problem
Conventional brassiere shoulder strap adjustment rings require complex and labor-intensive production processes, leading to high costs and aesthetic issues due to multilayered straps, which also compromise comfort and ease of adjustment.
Innovation Solution
An adjustable shoulder strap design where the strap body is directly sewn to a brassiere strap adjustment ring, eliminating the need for multiple passes through guiding holes, simplifying production, reducing thickness, and enhancing comfort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the conventional 8-shaped adjustment ring is used with multiple threading passes, then the shoulder strap can be adjusted for length, but the production process becomes complex and labor-intensive
Solution Approach 1:
The patent extracts the threading function from the adjustment ring structure itself and relocates it to the shoulder strap design. The strap includes integrated guiding elements that guide the strap through the adjustment ring in a single pass, eliminating the need for multiple threading operations through the ring structure.
Solution Approach 2:
The guiding holes and guiding structures are pre-formed in the shoulder strap during manufacturing, before the adjustment ring is attached. This preliminary preparation of the strap path eliminates the need for complex threading operations during final assembly, simplifying the production process.
2Adaptability or versatility
If the strap is threaded multiple times through the adjustment ring, then length adjustment is achieved, but the strap becomes multilayered and protrudes through outer garments
Solution Approach 1:
The patent removes the redundant looping and multilayering by extracting the adjustment function from a traditional 8-shaped ring configuration to a linear strap-with-guides configuration. This eliminates the doubling-back of the strap through the same space, preventing protrusion through outer garments.
Solution Approach 2:
The patent reorganizes the strap path from a two-dimensional looping pattern (threading back and forth through the same plane) to a more linear, space-efficient arrangement where the strap passes through guiding holes in sequence, reducing the vertical thickness and lateral profile at the adjustment ring location.
3Reliability
If the strap is threaded twice through the guiding holes, then the adjustment ring is secured, but the wearer must exert more force to move the strap during adjustment
Solution Approach 1:
The patent extracts the security function from multiple friction-based threading passes and relocates it to a combination of features: a single robust threading path through guiding holes, supplemented by optional locking mechanisms or friction-based retention at critical points. This reduces the number of times the strap must be forced through tight spaces.
Solution Approach 2:
The guiding holes and strap interaction are designed to allow smooth dynamic movement during adjustment, with rounded edges and appropriate clearances that reduce friction. The structure transitions from a static, tight-fit design to a dynamic, low-friction system that facilitates easy strap movement during wear.
4Reliability
If the fixed end is sewn to the shoulder strap, then the adjustment ring is anchored, but thickness differences affect wearer comfort
Solution Approach 1:
The patent applies different structural qualities to different locations: the anchoring point uses reinforced stitching or localized strengthening to ensure security, while the surrounding areas maintain a thin, smooth profile. The guiding holes and strap layers are configured to minimize thickness variations at the point where the strap contacts the wearer's skin.
Data Source
AI summary
The present invention provides an adjustable shoulder strap, its manufacturing method, and a brassiere strap adjustment ring, wherein the adjustable shoulder strap includes a strap body, and the brassiere strap adjustment ring includes a frame body and a fixed column, wherein the frame body defines and has a threading space, and the fixed column is horizontally placed in the frame body, dividing the threading space into a first guiding hole and a second guiding hole, wherein the fixed column has at least one threading hole aligned with the opening direction of the first guiding hole and the second guiding hole, allowing the corresponding stitching to pass through the at least one threading hole to stitch and secure one end of the strap body to the fixed column.