Telescopic Seatpost with Elastic Locking Mechanism

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Solution Overview

Problem

Existing bicycle seatposts are either rigid and inflexible or expensive due to the use of hydraulics and pneumatic valves for height adjustment, lacking reliability and affordability.

Innovation Solution

A seatpost assembly with a telescopic design and an elastic engagement element that allows for height adjustment without the need for hydraulic or pneumatic mechanisms, using a radially expandable and contractable spring to lock and unlock the telescopic displacement.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If hydraulic or pneumatic valves are used for height adjustment, then the seatpost can be adjusted, but the cost increases and reliability decreases

Engineering Contradiction:

Improveheight adjustment capabilityVSAvoidsealing reliability

Core Design Contradiction:

Ease of operationVSReliability

Solution Approach 1:

The patent replaces complex hydraulic or pneumatic valve systems with a purely mechanical spring-based locking mechanism. The spring engages with notches on the telescopic tube to lock at different heights, eliminating the need for fluid seals and complex valve assemblies, thereby improving reliability while maintaining adjustability

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses simple, inexpensive mechanical components (spring, notches, friction elements) instead of expensive hydraulic/pneumatic systems. These simple components are more reliable and easier to manufacture, reducing cost while providing sufficient functionality for height adjustment

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

2Ease of operation

If hydraulic or pneumatic valves are used for height adjustment, then the seatpost can be adjusted, but the manufacturing cost increases

Engineering Contradiction:

Improveheight adjustment capabilityVSAvoidmanufacturing cost

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The patent replaces expensive hydraulic or pneumatic valve systems with simple mechanical components including a spring, notches, and friction elements. This substitution dramatically reduces manufacturing complexity and cost while maintaining the height adjustment functionality

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The seatpost is divided into modular components (telescopic tube with notches, spring mechanism, friction elements) that can be manufactured separately using simple processes and assembled easily, reducing overall manufacturing cost compared to integrated hydraulic/pneumatic systems

Inventive Principle:

Principle #1Segmentation

3Device complexity

If a rigid fixed-height configuration is used, then the structure is simple, but the adaptability decreases

Engineering Contradiction:

Improvestructural simplicityVSAvoidheight adjustment capability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The patent transforms the rigid fixed-height structure into a dynamic adjustable structure by incorporating a telescopic tube with multiple notches and a spring-based locking mechanism. This allows the seatpost to adapt to different height requirements while maintaining structural simplicity through the use of straightforward mechanical components

Inventive Principle:

Principle #15Dynamics

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 lightweight, cost-effective, and reliable height-adjustable seatpost that can withstand lateral loads, offering improved structural strength and stiffness while maintaining ease of use and safety features.

Implementation Method 1

an elastic engagement element that is positioned to extend circumferentially around the first or the second portion. This engagement element may be elastically flexed between a released and unlocked first position that permits telescopic displacement of the first portion relative to the second portion and a locked or engaged second position

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS10214258B2Height adjustable seatpost assembly

Publication Date: 2019.02.26 SCHLANGER RAPHAEL

AI summary

A seatpost assembly, including a first seatpost portion, a second seatpost portion axially displaceable relative to the first seatpost portion along an axial axis, and an engagement element with a circumferential coil portion having a first termination and a second termination. The engagement element may be elastically deflected in a relaxing direction toward an engaged orientation to provide restraint of the axial displacement at a restraining interface with one of the first and second seatpost portions; and in a deflecting direction toward a released orientation for reduced restraint. The engagement element has an axially maintained engagement with the other one of the first seatpost portion. Where one of: (i) the released orientation corresponds to a radially outwardly expanded orientation of the engagement element relative to the deflected position; and (ii) the released orientation corresponds to a radially inwardly contracted orientation of the engagement element relative to the deflected position.