Two-Layer Wristband Nested Structure for Deformation Resistance
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Solution Overview
Problem
Conventional U-shaped wristbands made of soft and elastic materials are prone to deformation and falling off due to lack of tenacity, and adding a buckle structure increases manufacturing costs and alters the appearance.
Innovation Solution
A two-layer wristband design featuring a first U-shaped band with protruding vertical and horizontal walls and a second U-shaped band with ring-shaped grooves, where the first band is embedded and adhered to the second, enhancing structural integrity and appearance without new manufacturing techniques or costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a buckle structure is added to prevent deformation, then the wristband strength is improved, but the manufacturing cost and device complexity increase
Solution Approach 1:
The first U-shaped band is nested within the second U-shaped band, with the inner band's hollow portion receiving the outer band. This nesting creates a reinforced structure where the two bands work together to resist deformation, eliminating the need for separate buckle components while maintaining structural strength.
Solution Approach 2:
The wristband combines two different U-shaped bands with distinct structures (one with hollow portions and protruding walls, the other with depressed portions and ring-shaped grooves) to create a composite structure. This composite design provides enhanced strength and rigidity compared to a single-band design, without requiring additional buckle mechanisms.
2Strength
If an insert molding process with metal is used to prevent deformation, then the wristband strength is improved, but the appearance quality deteriorates
Solution Approach 1:
The reinforcement structure is localized to specific areas where needed: the first band has hollow portions and protruding vertical walls at strategic locations, and the second band has corresponding depressed portions and ring-shaped grooves. This localized structural enhancement provides strength without requiring metal inserts that would compromise the overall appearance.
Solution Approach 2:
The invention uses a composite structure of two bands with complementary geometric features rather than metal inserts. The protruding vertical walls of the first band fit into the depressed portions of the second band, creating a mechanically strong connection that maintains the aesthetic appearance of the wristband.
3Strength
If a two-layer structure with embedded bands is used, then the wristband strength is improved, but the manufacturing complexity increases
Solution Approach 1:
The first U-shaped band is formed with pre-designed hollow portions, protruding vertical walls, and horizontal walls before the second band is added. This preliminary structuring allows the second band to be precisely fitted into place, creating a strong embedded connection without requiring complex post-assembly operations or multi-step manufacturing processes.
Solution Approach 2:
The two-layer structure utilizes a nesting arrangement where the first band is placed within the second band, with complementary geometric features (hollow portions matching depressed portions, protruding walls matching ring-shaped grooves). This nesting design simplifies the manufacturing process compared to alternative embedded structures, as the bands can be sequentially formed and assembled using standard molding techniques.
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 two-layer wristband provides increased strength against deformation and a unique appearance, maintaining wearability without the need for buckles or additional manufacturing complexity.
Implementation Method 1
the outer surface of the second U-shaped symmetrical band is adhered to the inner surface of the first U-shaped symmetrical band
Data Source
AI summary
A two-layer wristband, including: a first U-shaped symmetrical band having two hollow portion on the two ends of the first U-shaped symmetrical band, respectively, each hollow portion is formed with a vertical wall protruding from the first U-shaped symmetrical band; a second U-shaped symmetrical band having a depressed portion on its outer surface, a pair of ring-like grooves is formed in the depressed portion; wherein the first U-shaped symmetrical band is placed in the depressed portion of the second U-shaped symmetrical band, and the pair of vertical wall of the first U-shaped symmetrical band joins the pair of ring-like grooves, respectively.