Telescopic Foldable Chair Design for Adjustable Seat Height
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Solution Overview
Problem
Existing foldable chairs have a fixed seat height, making them uncomfortable for both shorter and taller users, as they either elevate the feet or force the knees to bend excessively.
Innovation Solution
A telescopic foldable chair design with adjustable height, featuring telescopic frames and a locking mechanism that allows the front and rear leg tubes to adjust their position relative to support tubes, enabling the seat height to be customized.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the chair seat height is fixed, then the structure is simple and stable, but it cannot accommodate users of different heights, causing discomfort for both shorter and taller users
Solution Approach 1:
The patent applies the dynamics principle by transforming the fixed chair seat height into an adjustable one. The telescopic frame structure allows the support tubes to extend or retract relative to the leg tubes, enabling the chair seat height to be dynamically adjusted to suit different user heights while maintaining structural stability through the locking mechanism.
Solution Approach 2:
The patent implements parameter changes by modifying the height parameter of the chair seat. Through the telescopic frame mechanism, the support tubes can change their extension parameter, allowing the chair seat height to be adjusted within a specific range to accommodate different user requirements.
2Adaptability or versatility
If telescopic frames and locking mechanisms are added to adjust chair seat height, then adaptability to different users is improved, but the device complexity increases
Solution Approach 1:
The telescopic frame structure serves multiple functions: it provides structural support, enables height adjustment, and works with the locking mechanism to maintain stability. This multi-functionality reduces the need for separate components for each function, thereby limiting the increase in overall device complexity despite adding adjustability.
3Ease of operation
If the locking mechanism is unlocked to adjust height, then the support tubes can move relative to leg tubes for height adjustment, but the structural stability is temporarily reduced during adjustment
Solution Approach 1:
The locking mechanism operates in periodic cycles: locked for stability during use, unlocked for adjustment, then locked again for stability. This periodic action between locked and unlocked states allows the chair to maintain structural stability during normal use while enabling easy height adjustment when needed.
Data Source
AI summary
A foldable chair comprises a chair seat, front leg tubes, rear leg tubes, and two telescopic frames. The two telescopic frames respectively correspond to the front leg tubes and the rear leg tubes. Each of the two telescopic frames comprises two support tubes and a connection tube connected to the two support tubes. The two support tubes of a first of the two telescopic frames are respectively and telescopically coupled with the front leg tubes, and the two support tubes of a second of the two telescopic frames are respectively and telescopically coupled with the rear leg tubes. A locking mechanism is disposed between each of the support tubes and a corresponding one of the front leg tubes and the rear leg tubes.