Stair Stepper Linkage Mechanism for Step-Twist Mode Switching
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Solution Overview
Problem
Existing stair steppers lack the ability to synchronize step and twist training, and cannot switch between stepping and stepping-twisting training functions, limiting their functionality and convenience for users.
Innovation Solution
A stair stepper design incorporating a rotating mechanism with a first and second rotating shaft, a pedal mechanism, and a linkage member that allows for rapid switching between stepping and stepping-twisting training through a knob mechanism, featuring a limiting groove system and flexible stopping blocks for smooth motion conversion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single-function stepping mechanism is used, then the device structure is simple, but the training function is limited and cannot synchronize step and twist training
Solution Approach 1:
The pedal mechanism is designed to perform multiple functions: it can execute simple stepping motion when the linkage member is in one position, and synchronized stepping-twisting motion when the linkage member is in another position. This multi-functionality resolves the contradiction by allowing one mechanism to provide diverse training options without requiring separate dedicated mechanisms for each function.
Solution Approach 2:
The linkage member is designed to be movable along the second rotating shaft, allowing dynamic reconfiguration of the mechanism. By adjusting the position of the linkage member, the system can switch between different training modes (stepping only vs. stepping-twisting). This dynamic adjustability enables function switching without permanently fixing the mechanism structure, thus maintaining relative simplicity while achieving versatility.
2Adaptability or versatility
If separate equipment is used for stepping and twisting training, then each function can be optimized, but the device occupies more space and is less convenient for home use
Solution Approach 1:
The patent combines stepping and twisting training functions into a single integrated pedal mechanism. The same pedal structure can deliver both stepping motion and twisting motion depending on the configuration of the linkage member. This merging of functions into one device eliminates the need for multiple separate equipment pieces, thereby reducing the occupied space while maintaining training versatility.
Solution Approach 2:
The pedal mechanism serves as a universal training component that can accommodate both stepping and twisting exercises. By designing the mechanism to universally handle different motion types through the adjustable linkage member, the system consolidates multiple training needs into one device, reducing the overall footprint required in a home environment.
3Adaptability or versatility
If the linkage member is fixed in position, then the mechanism structure is simple, but the function switching between stepping and stepping-twisting training cannot be achieved
Solution Approach 1:
The linkage member is designed with movable capability along the second rotating shaft, transforming it from a fixed component to a dynamic one. This mobility allows the linkage member to be positioned at different locations to achieve different training functions. The dynamic nature of this component enables function switching without requiring completely separate mechanisms for each mode, thus adding versatility while controlling complexity through a single adjustable element.
Solution Approach 2:
The linkage member is segmented into distinct components (second sleeve pipe, limiting rod with vertical and transverse rods) that can independently move and interact with other mechanism parts. This segmentation allows the vertical rod to engage with different limiting grooves at different positions, enabling function switching. The segmented design provides adaptability while maintaining a relatively simple overall structure through modular components.
4Adaptability or versatility
If a complex switching mechanism is used to change training functions, then function versatility is improved, but the operation complexity increases
Solution Approach 1:
The limiting rod with its vertical rod and limiting grooves creates a self-guided positioning system. When the linkage member moves along the second rotating shaft, the vertical rod automatically engages with the appropriate limiting groove based on the desired function, without requiring complex control mechanisms or user intervention. This self-service positioning reduces operational complexity while maintaining function versatility.
Solution Approach 2:
The limiting grooves act as an intermediary mechanism that mediates between the movable linkage member and the fixed frame. By providing predetermined engagement positions through the limiting grooves, the system simplifies the switching process - the user only needs to move the linkage member to the desired position, and the limiting grooves automatically guide and lock it into the correct configuration for either stepping or stepping-twisting training. This intermediary structure reduces operational complexity compared to direct control mechanisms.
Data Source
AI summary
Provided in the invention is a stair stepper. A rotating mechanism includes a first rotating shaft and a second rotating shaft that are fixed in an intersecting manner, and the rotating mechanism is rotatably connected to a base through the first rotating shaft; a pedal mechanism and a linkage member are sequentially connected to the second rotating shaft, a limiting rod is provided on the linkage member, and a transverse rod of the limiting rod is slidably connected to an adapter; a first limiting groove is provided on the pedal mechanism, and a second limiting groove is provided on the base. The limiting rod on the linkage member is located in the first limiting groove or the second limiting groove, so that switching between two motion functions of stepping training and stepping-twisting training is implemented.