Folding Table Height Adjustment Pin-and-Sleeve Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional folding table height adjustment devices have limited adjustable ranges and are inconvenient during folding and unfolding operations, restricting the flexibility and usability of folding tables.
Innovation Solution
The height adjustment device incorporates an inner sleeve, an outer sleeve, an elastic positioning pin, and a cord with a handle, allowing for a more extensive and flexible height adjustment range by using engaging slots and a reset spring mechanism to restrain and disengage the sleeves, enabling easy height adjustment with minimal space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a conventional height adjustment device with pull rod and limiting device is used, then the table top height can be adjusted, but the adjustable range is limited and the operation is inconvenient
Solution Approach 1:
The height adjustment device is segmented into inner sleeve and outer sleeve components, with the inner sleeve containing multiple engaging slots at different positions. This segmentation allows the table top to be adjusted to multiple discrete height levels, expanding the adjustable range while maintaining operational simplicity through the pull rod mechanism that engages with these segmented positions.
Solution Approach 2:
The connection rod is designed to be slidable within the sliding seat, allowing dynamic adjustment of the distance between connection rods. This dynamic mechanism enables the table top height to be freely adjusted within a range, transforming the static limiting device into a dynamic system that accommodates various height requirements during folding and unfolding operations.
2Ease of operation
If the pull rod is drawn outwardly to adjust height, then the inner and outer sleeves move relative to each other, but the pull rod requires two degrees of freedom and needs a limiting device, restricting the adjustable range
Solution Approach 1:
The limiting device is extracted and replaced with a pull rod that directly engages with engaging slots on the inner sleeve. This extraction eliminates the need for complex limiting mechanisms and multiple degrees of freedom, simplifying the operation while the multiple engaging slots provide the necessary adjustable range. The pull rod only needs to move in one degree of freedom (inward/outward) to engage different height positions.
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
This solution provides a more diverse and flexible height adjustment range for folding tables, enhancing user convenience and usability while maintaining compactness.
Implementation Method 1
an elastic positioning pin selectively engages a respective one of the engaging slots to restrain the inner and outer sleeves from moving relative to one another
Implementation Method 2
using engaging slots and a reset spring mechanism to restrain and disengage the sleeves, enabling easy height adjustment
Data Source
AI summary
Disclosed are height adjustment devices and folding tables. A height adjustment device includes movably coupled inner and outer sleeves. The inner and outer sleeves are coupled to first and second legs of a table. The height adjustment device also includes an elastic positioning pin and a cord. The elastic positioning pin is disposed on an external side of the outer sleeve to selectively engage with the inner sleeve. The cord is coupled to the elastic positioning pin and configured to pull the elastic positioning pin outward to disengage the elastic positioning pin from the inner and/or outer sleeves.