Frame structure of net chair-back
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Solution Overview
Problem
Conventional net chair-backs have exposed locking holes and threaded fasteners on the rear side, which deteriorate the outside appearance and make the chair look poor.
Innovation Solution
A frame structure with a recessed groove in the first frame member and an insertion groove in the second frame member, featuring fixation posts and locking pillars with retention members that securely engage, hiding the fasteners and holes from view.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If locking holes and threaded fasteners are used to combine frame members, then the frame structure can be securely assembled, but the locking holes and fasteners become exposed on the rear side deteriorating the outside appearance
Solution Approach 1:
The retention member is received within the recessed groove of the second frame member, nesting the fastening mechanism inside the frame structure rather than having it exposed externally. This allows the threaded fastener to secure the frame members while being hidden from external view, resolving the contradiction between assembly strength and appearance.
Solution Approach 2:
The retention member acts as an intermediary element that mediates between the threaded fastener and the frame members. It receives the fastener and provides a bearing surface against the first frame member, enabling secure assembly while concealing the fastener within the recessed groove structure.
2Ease of manufacture
If locking holes are formed completely through the frame member, then threaded fasteners can be easily inserted and secured, but the holes allow fasteners to be clearly observable from the rear side
Solution Approach 1:
The recessed groove provides a nested cavity within the second frame member that receives the retention member and conceals the threaded fastener. This nested structure maintains ease of fastener insertion while preventing the fastener from being observable from the rear side.
3Stability of the object's composition
If conventional mounting pins are used to fix the net member, then the net member can be secured in position, but the overall structure requires additional exposed fasteners that degrade appearance
Solution Approach 1:
The patent combines the frame assembly function and the net member fixation function into a unified structure. The retention member not only secures the first frame member to the second frame member but also provides a bearing surface that fixes the net member in position, eliminating the need for separate exposed fasteners and improving overall appearance.
Data Source
AI summary
A net chair-back includes a first frame member, a second frame member corresponding to the first frame member and combined with the first frame member, and a net member arranged between the first frame member and the second frame member. The first frame member includes a recessed groove formed therein and arranged in a circumferentially surrounding form. The recessed groove includes a plurality of fixation posts mounted therein. The second frame member includes an insertion groove formed therein and arranged in a circumferentially surrounding form. The insertion groove includes a plurality of locking pillars formed therein. The locking pillars each include a retention member mounted thereto. The retention member is tightly engageable with an inside surface of the fixation post. In this way, exposing locking holes or threaded fasteners outside the net chair-back can be prevented to thereby improve the outside appearance of the net chair-back.