Segmented Armrest Pad Assembly for Forearm and Elbow Support
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Solution Overview
Problem
Conventional chair armrests lack effective support for the forearm and elbow when a user bends their elbow, leading to fatigue, as they typically have only one support plane.
Innovation Solution
An armrest pad assembly with a flexible material, featuring a first and second support section connected by a bendable section with recesses, and internal frames that fold upward and downward, providing two inclined support surfaces when the armrest frame adjusts, and a rotation locking mechanism to secure the folded position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single support plane is used in conventional armrests, then the structure is simple, but the forearm and elbow cannot be effectively supported when the user bends their elbow, causing fatigue
Solution Approach 1:
The armrest pad is divided into multiple support sections (first support section, second support section, third support section) with different orientations. The first support section supports the forearm horizontally, the second support section supports the elbow at an upward angle, and the third support section provides additional support. This segmentation allows the armrest to adapt to different arm positions and provide effective support for both forearm and elbow when the user bends their elbow, resolving the contradiction between support capability and structural simplicity.
2Ease of operation
If the armrest pad is made flexible to improve comfort, then user comfort is enhanced, but the structural stability may be compromised
Solution Approach 1:
The armrest pad employs a composite structure combining flexible cushioning material with an internal frame system. The flexible material (such as sponge or memory foam) provides comfort and adaptability to user contact, while the internal frame (comprising first inner frame, second inner frame, and third inner frame) maintains structural stability and defines the geometric configuration of the support sections. This composite approach resolves the contradiction between flexibility for comfort and structural stability.
Data Source
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AI summary
Embodiments of the present disclosure relate to the technical field of chair adjustment and control devices, and in particular, relate to an electrically controlled chassis and a chair. The electrically controlled chassis includes: a chassis body; an electrical control box, internally provided with an accommodation space; a drive motor, configured to control lift adjustment of the chassis of the chair and pitch adjustment of a backrest of the chair; a winding mechanism, connected to an output shaft of the drive motor; a first pull cord, reversely wound on the winding mechanism; a second pull cord, normally wound on the winding mechanism; a backrest adjustment mechanism, disposed on the chassis body, and fixedly connected to the other end of the first pull cord; and a chassis lift mechanism, disposed on the chassis body, and fixedly connected to the other end of the second pull cord.