Eyeglasses Subsidiary Frame Snap-Fit Assembly
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Solution Overview
Problem
Conventional assembly structures for eyeglasses subsidiary frames, such as those using magnets or slot-insert fittings, fail to provide a firm and stable fixation, leading to potential detachment during movement or swaying of the human body.
Innovation Solution
The proposed assembly structure incorporates a nose pad bracket with female snap-fit portions on the eyeglasses major body and a subsidiary frame with corresponding male snap-fit portions and an abutting segment, ensuring firm positioning by fitting the subsidiary frame against the lenses and abutting with a protruding portion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If magnets attraction or slot-insert fitting is used to assemble the main frame and subsidiary frame, then the assembly process is simple, but the fixation becomes unstable and the subsidiary frame may fall off during movement or swaying of the human body
Solution Approach 1:
The engagement structure is divided into multiple independent components: engagement protrusions on the subsidiary frame, engagement grooves on the main frame, and intermediate engagement bridges connecting them. This segmentation allows each component to perform a specific function while collectively providing stable fixation that prevents the subsidiary frame from falling off during movement.
Solution Approach 2:
The engagement bridges are positioned within the engagement grooves of the main frame, and the engagement protrusions extend from the subsidiary frame into these grooves. This nested arrangement creates a hierarchical engagement system where multiple levels of engagement structures work together to provide both simplicity of assembly and stability of fixation.
2Device complexity
If conventional assembly structures are used, then the device complexity is low, but the subsidiary frame cannot be firmly fixed in position
Solution Approach 1:
The engagement protrusions and engagement bridges are merged into a single integrated engagement structure on the subsidiary frame, while the corresponding engagement grooves are integrated into the main frame. This merging reduces the number of separate components while maintaining the multi-level engagement system that provides firm position stability.
Solution Approach 2:
The engagement structure extends in multiple spatial dimensions: the engagement protrusions extend from the subsidiary frame toward the main frame, the engagement bridges connect these protrusions to the engagement grooves, creating a three-dimensional engagement system that provides stability in multiple directions simultaneously.
Data Source
AI summary
An assembly structure for subsidiary frame of eyeglasses is provided. A nose pad bracket provided on an eyeglasses major body has an engaging portion having female snap-fit portions provided at both sides thereof to fit with male snap-fit portions on the subsidiary frame. Further, an abutting segment is extended from the surface of a recessed portion on the subsidiary frame in such a manner as to fit with a recessed groove provided on a protruding portion of a nose bridge section of the subsidiary frame. Therefore, one side of the subsidiary frame is pressed against the lenses of the eyeglasses major body and the other side is firmly abutted with the protruding portion, so as to achieve firm positioning of the subsidiary frame and to protect the subsidiary frame from fall off in using.