Modular Walking Stick with Internal Height Adjustment
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Solution Overview
Problem
Conventional walking sticks have poor aesthetics, are not customizable, and lack ergonomic design, leading to discomfort and functionality issues, especially for users with arthritis, due to inadequate height adjustment mechanisms, poor traction, and lack of self-standing capability.
Innovation Solution
A modular walking stick with interchangeable shafts, handles, and feet, featuring a friction plug for alignment, a height adjustment mechanism with a pin and collar system, and a foot replacement mechanism with a depressible latch button, designed to provide comfort, adjustability, and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional walking sticks are mass-produced with fixed designs, then manufacturing efficiency is improved, but aesthetics and customization are worsened
Solution Approach 1:
The walking stick is divided into separate modular components: handle assembly, shaft assembly, and foot assembly. Each component can be independently manufactured and then assembled through coupling mechanisms (bayonet-style couplings, friction fits, or threaded connections), allowing mass production of individual parts while enabling customized combinations for different user needs and aesthetic preferences.
Solution Approach 2:
The coupling mechanisms are designed to be universal across different component types. The same coupling system can join various handle designs to various shaft designs to various foot designs, creating a universal platform that supports multiple configurations and customization options without requiring different assembly procedures for each combination.
2Adaptability or versatility
If height adjustment mechanisms with visible holes are added to walking sticks, then adaptability is improved, but aesthetics are worsened
Solution Approach 1:
The height adjustment holes are extracted from the visible exterior surface of the shaft and relocated to the interior. The shaft is designed with internal adjustment mechanisms where holes and adjustment features are positioned inside the shaft wall, making them invisible from the outside while preserving the external aesthetic appearance of the shaft.
Solution Approach 2:
The height adjustment mechanism is nested within the shaft structure. The adjustment holes are positioned inside the shaft wall thickness, and the adjustment pin or mechanism is contained within the shaft's internal cavity, creating a nested configuration where the functional adjustment features are hidden within the shaft's own structure.
3Reliability
If metal spring-loaded pins are used for height adjustment, then reliability is improved, but ease of operation is worsened for users with arthritis
Solution Approach 1:
Instead of using small metal spring-loaded pins that require precise positioning and small finger movements, the invention uses a collar-based adjustment system with larger, more accessible features. The collar can be grasped with the whole hand and rotated or pressed to engage/disengage from the adjustment holes, copying the reliable pin mechanism's function but with much larger, easier-to-manipulate interface elements suitable for users with limited dexterity.
Solution Approach 2:
The adjustment mechanism parameters are changed from small-diameter pins requiring precise alignment to large-diameter collars with greater clearance and tolerance. The collar's larger size changes the operational parameters from fine motor skill requirements to gross motor skill operations, making adjustment easier for users with arthritis while maintaining reliable engagement through the same hole-based positioning system.
4Device complexity
If conventional small feet are used on walking sticks, then device complexity is reduced, but reliability is worsened due to poor ground contact and traction
Solution Approach 1:
The foot is designed with flexible or deformable materials that allow it to dynamically adapt its shape upon ground contact. The foot can compress, flex, or deform to conform to the ground surface, increasing the effective contact area and improving traction reliability. This dynamic adaptation occurs automatically when the foot strikes the ground, providing reliable contact without requiring complex adjustable mechanisms.
Solution Approach 2:
The foot is constructed from composite materials that combine different properties: a rigid structural core for strength with an outer layer of flexible, high-friction material for traction. This composite construction allows the foot to maintain structural integrity while providing enhanced ground contact and grip, improving reliability without significantly increasing overall device complexity.
5Device complexity
If walking sticks are designed as single solid pieces, then device complexity is reduced, but adaptability is worsened as users cannot customize components
Solution Approach 1:
The walking stick is segmented into distinct modular components (handle, shaft, foot) that can be independently manufactured, selected, and assembled. Each component can be interchanged with alternative designs from the same component family, allowing users to customize their walking stick by mixing and matching different handles, shafts, and feet while maintaining relatively simple individual component designs.
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 modular design enhances user comfort and confidence by allowing customization, improving traction, and enabling the walking stick to stand independently, addressing the limitations of conventional walking sticks.
Implementation Method 1
a friction plug coupled to the shaft, the friction plug aligning the shaft with the handle
Implementation Method 2
a foot replacement mechanism comprising: a depressible latch button, a spring disposed within the shaft and applying a force to the depressible latch button
Data Source
AI summary
A walking stick can include a handle (50) including a head (52). The head (52) can include at least one internal reinforcement member (90). The at least one internal reinforcement member (90) can have a shape that is substantially the same as a shape of the head (52). The bathing wand can include a neck (54) and a shaft (20). The bathing wand can also include a foot (150, 180) for engaging the ground. The foot (150, 180) can be coupled to the shaft (20). In some aspects, the foot (180) can include at least two arms (186) extending from a top portion (190) towards a bottom portion (194) of the foot (180). Each of the at least two arms (186) can be coupled together through a base (188) of the of the bottom portion (194). In some aspects, at least one arm (186) can form a loop (193).