Chair Armrest Locking Mechanism for Precise Height Adjustment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing chair armrests often lack efficient mechanisms for vertical height adjustment, limiting user comfort and flexibility.
Innovation Solution
The armrest mechanism includes a support post with slideable members and an actuator that moves between locked and unlocked positions, allowing the arm pad to be adjusted vertically by extending and retracting within channels, with a spring member biasing the actuator to the locked position for secure height settings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If armrests are affixed immovably to the chair, then structural simplicity is maintained, but user comfort and adaptability are limited
Solution Approach 1:
The armrest mechanism is divided into multiple slideable members (first slideable member, second slideable member) that can move independently within channels, allowing incremental height adjustment while maintaining overall structural simplicity
Solution Approach 2:
The first slideable member is positioned within the second slideable member, creating a nested configuration that allows compact storage when retracted and extended adjustment when needed, achieving adaptability without proportionally increasing complexity
2Adaptability or versatility
If slideable members are made moveable for adjustment, then height adaptability is improved, but structural stability deteriorates
Solution Approach 1:
The mechanism transitions between static (locked) and dynamic (adjustable) states through the actuator, allowing the armrest to be stable during use but easily reconfigurable when adjustment is needed
Solution Approach 2:
The actuator serves as an intermediary component that controls the transition between locked and unlocked states, mediating between the user's adjustment action and the slideable members' movement to ensure stable positioning
3Measurement precision
If multiple slideable members are used for precise adjustment, then positioning precision is improved, but device complexity increases
Solution Approach 1:
The adjustment range is segmented into multiple discrete positions defined by steps within the channels, allowing precise positioning without requiring continuous adjustment mechanisms
Solution Approach 2:
Multiple slideable members are combined and controlled by a single actuator, merging the complexity of multi-position control into a unified mechanism that simplifies operation while maintaining precision
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables precise and user-friendly vertical adjustment of the arm pad, enhancing comfort and adaptability to different user preferences.
Implementation Method 1
a spring member biased the actuator to the locked position
Data Source
AI summary
An armrest for a chair includes a first slideable member moveably positioned within a support post and a second slideable member moveably positioned within the support post. The first slideable member is moveably positioned within a channel of the second slideable member such that the first slideable member is moveable relative to the second slideable member. An actuator is connected to the first and second slideable members. The actuator can optionally be included that is actuatable from a locked position to an unlocked position. The first and second slideable members are immovable within the post when the actuator is in the locked position and the first and second slideable members are moveable within the post when the actuator is in the unlocked position.