Multi-Step Height Adjuster Using Nested Spindles for Extended Stroke
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Solution Overview
Problem
Conventional multi-step height adjusters using gas cylinders have a limited stroke, restricting their ability to raise upper plates or adjust heights on tables, work stands, dining tables, or desks effectively.
Innovation Solution
A multi-step height adjuster design featuring a base tube portion with two reciprocating base tubes and spindles, along with a gas cylinder or gas spring mechanism, allows for independent adjustment of multiple stages, increasing the overall stroke length by integrating the movement of the first spindle and second base tube.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If a single-stage gas cylinder is used, then the structure is simple, but the stroke length is limited
Solution Approach 1:
The height adjuster is divided into multiple independent stages, each with its own base tube and spindle. The first base tube and first spindle form one stage, while the second base tube and second spindle form another stage. This segmentation allows each stage to contribute to the overall stroke length, enabling the system to achieve a greater total stroke than a single-stage design without requiring an excessively large single component.
Solution Approach 2:
The second base tube is inserted into the first base tube, and the second spindle is inserted into the first spindle, creating a nested configuration. This nesting allows the multi-stage structure to be compact while maintaining the ability to provide extended stroke length through the combined movement of multiple stages.
2Length of moving object
If a multi-stage structure with multiple base tubes and spindles is used, then the stroke length is increased, but the device complexity increases
Solution Approach 1:
The first base tube and second base tube are combined in a nested arrangement, as are the first spindle and second spindle. This merging of components into a compact nested structure reduces the overall space required and simplifies the assembly compared to having separate independent stages, while still achieving the extended stroke length through the coordinated movement of multiple stages.
3Length of moving object
If the first spindle and second base tube are integrally moved, then the stroke length is maximized, but the control complexity increases
Solution Approach 1:
The opening/closing pin is pre-positioned to automatically open or close the gas flow path based on the movement of the piston rod. When the piston rod moves, it directly actuates the opening/closing pin without requiring additional control mechanisms, thereby simplifying the control system while enabling the integrated movement of the first spindle and second base tube to achieve maximum stroke length.
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 design achieves a greater stroke length compared to single-stage systems, enabling more substantial height adjustments and improved versatility in applications such as tables, work stands, and seating systems.
Implementation Method 1
an adjustment portion (300) installed in the spindle portion (200) to transmit power to the spindle portion
Data Source
AI summary
According to an aspect of the present disclosure, a multi-step height adjuster includes a base tube portion including a first base tube and a second base tube vertically reciprocating inside the first base tube; a spindle portion including a first spindle installed inside the first base tube to vertically reciprocate and a second spindle installed inside the second base tube to vertically reciprocate; and an adjustment portion installed in the spindle portion to transmit power to the spindle portion, wherein the first spindle and the second base tube are integrally moved.