Adjustable Treadmill Armrest Locking for Ergonomic Height Fit
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Solution Overview
Problem
Existing treadmills have fixed armrests that fail to accommodate users of varying heights, causing visual discomfort and limited limb extension due to inflexible height adjustment, which affects ergonomics and user experience.
Innovation Solution
A treadmill with adjustable armrests featuring a flexible locking sleeve and seat pipe clamp mechanism that allows stepless height adjustment of the armrests, utilizing a locking sleeve made of elastic material to distribute clamping force uniformly and prevent wear.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the armrests are rigidly connected to the treadmill rack through fixed vertical pipes, then the structure is simple and manufacturing cost is low, but the armrest height cannot be adjusted to accommodate users of different heights
Solution Approach 1:
The patent transforms the fixed rigid connection into a dynamic adjustable structure by allowing the second pipe to slide within the first pipe. The vertical pipe component changes from a static fixed connection to a dynamic telescopic structure that can adapt to different user heights while maintaining structural integrity through the locking mechanism.
Solution Approach 2:
The patent implements nesting by placing the second pipe inside the first pipe, creating a telescopic structure. The smaller pipe (second pipe) is nested within the larger pipe (first pipe), allowing height adjustment while maintaining a compact structure when retracted.
2Adaptability or versatility
If a locking mechanism is added to enable height adjustment, then armrest height adaptability is improved, but the device complexity and manufacturing cost increase
Solution Approach 1:
The locking sleeve acts as an intermediary component between the seat pipe clamp and the second pipe. It mediates the clamping force from the seat pipe clamp and distributes it uniformly around the second pipe through radial elastic deformation, enabling reliable locking while using simple, easily manufactured components.
Solution Approach 2:
The locking sleeve changes its radial dimension through elastic deformation when clamped by the seat pipe clamp. This parameter change (radial compression) enables the locking function without requiring complex mechanical mechanisms, maintaining ease of manufacture while achieving height adjustability.
3Reliability
If the seat pipe clamp directly clamps the second pipe, then the locking mechanism is simple, but micro motion wear occurs between the pipe walls reducing service life
Solution Approach 1:
The locking sleeve serves as a protective intermediary layer between the seat pipe clamp and the second pipe. It absorbs the clamping force through its elastic material properties and distributes it uniformly, preventing direct contact and micro-motion wear between the clamp and the second pipe, thereby extending component service life.
Solution Approach 2:
The locking sleeve is made of flexible elastic material that can deform radially under clamping force. This flexible shell absorbs mechanical stress and protects the rigid second pipe from wear, combining the simplicity of a thin-walled structure with enhanced durability through elastic deformation.
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 adjustable armrest mechanism enhances user comfort by accommodating different user heights and reduces wear on components, extending the lifespan of the armrests and improving ergonomic usability.
Implementation Method 1
the locking sleeve undergoes a radial elastic deformation and clamps the outer walls of the two second pipe
Data Source
AI summary
A treadmill with adjustable armrest height is provided. Which includes a rack, a running platform is provided on the rack; vertical pipe components symmetrically arranged on two sides of a front end of the rack, the vertical pipe components include a first pipe and two second pipes. Tops of the second pipes are extended to an upper side of an opening the first pipe and are provided with a handrail; a console connected between the two second pipes; a height locking mechanism including a locking sleeve and a seat pipe clamp, the locking sleeve is made of flexible material and is sleeved on outer walls of the second pipes; when the seat pipe clamps the locking sleeve, the locking sleeve undergoes a radial elastic deformation and clamps the outer walls of the second pipes, achieving a mechanical locking of a lifting stroke of the second pipes.