Telescopic module
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Solution Overview
Problem
Conventional telescopic stands in desks and chairs experience high friction and wear, leading to unstable movement and reduced functionality over time, as they lack effective mechanisms to minimize friction between inner and outer tubes.
Innovation Solution
Incorporating rollers between the first and second tubes, which are pivoted to touch the inner or outer sides of the tubes, significantly reducing friction and wear by allowing stable reciprocation, and an adjustable mechanism using a hub with flexible portions and an adjusting member to optimize roller pressure for smoother movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a ring is provided between the inner tube and the outer tube to reduce friction, then the friction is reduced, but the ring wears out and loses its function over time
Solution Approach 1:
The patent introduces a roller as an intermediary element between the inner tube and outer tube. The roller rotates on the inner tube surface while the outer tube moves, converting direct sliding friction into rolling friction. This intermediary mechanism significantly reduces friction and prevents wear of the tube surfaces, maintaining reliable operation over time.
Solution Approach 2:
The patent replaces the traditional ring-based friction reduction mechanism with a roller-based system. The roller rotates freely, substituting the sliding mechanical contact of the ring with a rotating mechanical contact, thereby reducing friction and wear while maintaining the telescopic function.
2Force
If ribs are provided on the inner side of the outer tube or outer side of the inner tube instead of the ring, then friction is reduced, but the tubes still wear after long time operation
Solution Approach 1:
The roller acts as a mediator between the inner and outer tubes, preventing direct contact and wear between the tube surfaces. The roller absorbs the wear through its replaceable design, protecting the expensive tube components from wear damage.
Solution Approach 2:
The patent changes the contact parameter from sliding friction (ring or ribs) to rolling friction (roller). This parameter change fundamentally reduces both the magnitude of friction and the wear rate, extending the service life of the telescopic mechanism.
3Device complexity
If the ring is fixed to the outer tube, then the structure is simplified, but relative motion between the ring and inner tube causes wear
Solution Approach 1:
The roller is designed to rotate dynamically on the inner tube surface rather than being fixed to the outer tube. This dynamic rotation allows the roller to maintain contact with both tubes while reducing friction and wear, balancing structural simplicity with reliability.
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 telescopic module with reduced friction and wear, ensuring stable and smooth height adjustment over time, even with prolonged use, by utilizing rollers and an adjustable mechanism to maintain low friction and prevent wear on the tubes.
Implementation Method 1
The roller touches at least one of an inner side of the first tube and an outer side of the second tube to be turned when the second tube is moving. The roller may reduce the friction between the first and the second tubes when the second tube is moving.
Data Source
AI summary
A telescopic module includes a first tube having a passageway therein; a second tube received in the passageway of the first tube for reciprocation; a hub connected to the second tube; a roller pivoted on the hub to touch the inner side of the first tube; and an adjusting member. The hub is provided with an expanding hole and flexible portions. The roller is pivoted on the flexible portion, and the adjusting member is inserted into the expanding hole and abuts against the flexible portions to move the roller outwardly.