Leveling Folding Chair With Telescoping Legs for Sloped Ground
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional folding chairs fail to provide a comfortable, horizontal seating surface on angled or sloped ground surfaces, leading to awkward sitting positions and instability due to their design, which does not anchor properly to the ground.
Innovation Solution
A folding chair with telescoping back legs and a locking mechanism that allows the chair to adjust to a horizontal position on sloped surfaces, featuring a pair of locking mechanisms with a locking key and leveling spring to secure the seat frame in a level orientation, and an anchoring mechanism for stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional folding chairs are placed on sloped surfaces, then the chair structure remains simple and portable, but the seating surface becomes angled and uncomfortable for users
Solution Approach 1:
The chair employs telescoping legs with adjustable lengths that can be dynamically modified to compensate for ground slope. The locking mechanism allows the leg lengths to be fixed at different positions, enabling the chair to adapt to various terrain angles while maintaining a horizontal seating surface.
Solution Approach 2:
The chair structure is divided into separate adjustable segments - specifically the telescoping back legs with independent locking mechanisms. This segmentation allows each leg to be adjusted independently to achieve proper leveling on sloped surfaces without requiring complete structural redesign.
2Reliability
If conventional folding chairs are placed on angled surfaces, then the chair maintains its standard design, but the chair slips and becomes unstable
Solution Approach 1:
The anchoring system includes movable locking keys that can engage or disengage from the telescoping legs. When engaged, the locking keys prevent the legs from sliding, providing stable anchoring on sloped surfaces. The system transitions from a static design to a dynamic one that can adapt to different stability requirements.
Solution Approach 2:
The locking keys serve as intermediary elements between the telescoping legs and the chair frame. These locking keys transfer and secure the adjusted leg positions, acting as a mechanical intermediary that ensures the anchoring function without requiring complex direct connection mechanisms.
3Ease of operation
If telescoping legs with locking mechanisms are added to provide horizontal seating on slopes, then seating comfort improves, but the chair becomes more complex and harder to operate
Solution Approach 1:
The locking mechanism is designed to be operated by the user through simple manual action - pulling or pushing the locking key to engage or disengage the lock. The system serves itself by using the user's body weight and simple hand movements to achieve the locking function without requiring additional tools or complex操作流程.
Solution Approach 2:
The locking function is extracted as a separate, independent component (the locking key) that can be easily manipulated. This extraction allows the locking mechanism to be operated independently from the main chair structure, simplifying the user interaction while maintaining the necessary complexity for stable locking.
Data Source
AI summary
A chair is provided that is configurable to provide a substantially horizontal seating surface when the chair is disposed on an angled ground surface. The chair comprises a back frame having a pair of telescoping back legs including an upper back leg tube and a lower back leg tube slidingly disposed within the upper back leg tube. The chair additionally includes a pair of locking mechanisms comprising a locking key that includes a locking aperture through which the respective lower back leg tube extends. Each locking mechanism is structured and operable to selectively position the respective locking key in an engaged position that binds the lower back leg tube such that the lower back leg tube cannot slide into the upper back leg tube, and a disengaged position that allows the lower back leg tube to freely slide within the upper back leg tube.