Armrest structure with adjustable lifting function
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Solution Overview
Problem
Conventional chairs with adjustable armrests are overly complex, leading to high maintenance costs and user discomfort due to varying arm lengths.
Innovation Solution
An armrest structure featuring a simple assembly with a main base tube, outer base tube, control member, and spring, allowing for adjustable height and pivot angle through a sliding mechanism with positioning holes and a guide hole, enabling easy adjustment and reset without complex mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional adjustable armrest structures are used, then height and angle adjustment functionality is achieved, but device complexity increases and maintenance cost rises
Solution Approach 1:
The armrest is divided into multiple functional segments: a fixed base tube, a movable outer base tube with cushion, and a control member with fastening part. This segmentation allows independent adjustment of each component while maintaining overall structural simplicity. The positioning holes are also segmented along the base tube to provide discrete adjustment positions.
Solution Approach 2:
The adjustment control function is extracted into a separate control member that can be independently operated. The fastening part is taken out as a distinct element that engages with positioning holes, separating the control mechanism from the main armrest structure and simplifying both design and maintenance.
2Ease of repair
If simple assembly structure is used, then maintenance cost is reduced, but adjustment precision and positioning accuracy deteriorate
Solution Approach 1:
Positioning holes are pre-formed at specific locations along the base tube to ensure accurate positioning before assembly. The control member is pre-designed with a fastening part that precisely engages with these predetermined positions, eliminating the need for complex adjustment mechanisms while maintaining positioning accuracy.
Solution Approach 2:
The spring-loaded fastening part automatically engages with positioning holes when the outer base tube is moved to a desired position, providing self-positioning functionality. This eliminates the need for complex locking mechanisms or precise manual alignment, achieving both simplicity and accuracy.
3Ease of operation
If adjustable lifting function is added, then user comfort is improved, but device complexity increases
Solution Approach 1:
The outer base tube is designed to be movable relative to the base tube, allowing dynamic adjustment of armrest height and angle. The spring-loaded fastening mechanism enables smooth transitions between positions while maintaining stability when positioned, providing both comfort and simplicity.
Solution Approach 2:
The control member acts as an intermediary between the user's adjustment input and the armrest position change. By pressing the control member, the user activates the fastening part to release from positioning holes, allowing smooth movement to new positions without complex mechanisms.
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
The solution provides a cost-effective, user-friendly adjustable armrest that accommodates different arm lengths, reducing maintenance costs and enhancing user comfort by allowing easy height and angle adjustments.
Implementation Method 1
the spring is pushed to elastically deform to store elastic energy, and when the force applied on the press control pan to buckle and press is released, an end of the spring storing elastic energy elastically pushes the press control pan toward the opening to reset position
Data Source
AI summary
An armrest structure includes a main base tube, an outer base tube, a control member, and a spring, and the control member includes a pivot part, a press control part, a fastening part, and a restraining part, when the press control part of the control member is pressed, the spring is pushed to store elastic energy, and the fastening part of the control member can be released from being engaged with the main base tube, and the outer base tube can be adjusted to longitudinally lift; in the other hand, when the force applied on the press control part of the control member to press and buckle is removed, the fastening pan can be engaged with the main base tube, so that the outer base tube is unable to lift and move relative to the main base tube.