Height Adjustable Table with Top-Integrated Counterbalance Mechanism
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Solution Overview
Problem
Existing height adjustable tables with counterbalance mechanisms either result in a bulky base that reduces leg room or fail to accommodate varying loads, leading to safety hazards due to excessive force requirements or uncontrolled movement of the work surface.
Innovation Solution
A height adjustable table with a constant-force counterbalance mechanism integrated into the top assembly, featuring a tension spring coupled to a snail cam pulley by a snail cable, and a synchronized lift mechanism with pulley systems and bands, along with a preload mechanism to adjust counter-weighting force and ensure safe, effortless height adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If counterbalance mechanisms are disposed within table legs or cross-member beams, then height adjustment is effortless, but the support structure becomes bulky and reduces leg room below the work surface
Solution Approach 1:
The counterbalance mechanism is extracted from the traditional locations (table legs and cross-member beams) and relocated to the top assembly of the table. This extraction allows the support structure to be minimized for leg room while maintaining the counterbalance function in a different location that does not interfere with lower clearance.
2Volume of moving object
If gas springs are used in opposing table legs, then more leg room is provided, but the counterbalance mechanism cannot accommodate varying loads, requiring excessive force or creating safety hazards
Solution Approach 1:
The counterbalance mechanism uses a spring-loaded design with adjustable preload that can dynamically adapt to varying loads on the work surface. The spring mechanism provides progressive resistance that accommodates different weight conditions, and the adjustable preload allows the system to be tuned for specific load requirements, ensuring safe and effortless operation across various scenarios.
Solution Approach 2:
The counterbalance mechanism allows for parameter changes in the spring preload and tension to accommodate varying loads. By adjusting these parameters, the system can adapt to different weight conditions on the work surface, preventing both excessive force requirements and uncontrolled movement.
3Device complexity
If the counterbalance force is preset, then the mechanism is simple, but it cannot adjust to varying loads, leading to excessive force requirements or uncontrolled work surface movement
Solution Approach 1:
The counterbalance mechanism transitions from a static preset force system to a dynamic adjustable spring-loaded system. The spring mechanism inherently provides progressive resistance that adapts to varying loads, and the included adjustment capability allows the preload to be tuned for different operating conditions while maintaining relatively simple overall mechanism design.
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 non-bulky, load-variable counterbalance mechanism that ensures safe and effortless height adjustment of the work surface, eliminating safety risks associated with non-load variable systems while maintaining minimal effort and optimal leg room.
Implementation Method 1
the counterbalance mechanism, which can comprise a tension spring coupled to a snail cam pulley by a snail cable
Implementation Method 2
a tension spring coupled to a snail cam pulley by a snail cable
Implementation Method 3
The synchronized lift mechanism can comprise at least two bands operatively engaged with a pulley system disposed within the right and left telescoping leg assemblies
Data Source
AI summary
A height adjustable table, which has a counterbalance mechanism integrated into a top assembly of the table is disclosed. The height adjustable table can include a top assembly supported by a base assembly, which can include right and left telescoping leg assemblies. The top assembly can include a work surface supported by a housing. A counterbalance mechanism, which can include a spring coupled to a snail cam pulley, can be mounted within the housing. A synchronized lift mechanism, which can include at least two bands operatively engaged with a pulley system disposed within the right and left telescoping leg assemblies, can be operatively coupled to the snail cam pulley such that the counterbalance force provided by the counterbalance mechanism is transmitted to the synchronized lift mechanism.