Adjustable Hand Exerciser with Sliding Support and Spring Tension
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Solution Overview
Problem
Existing hand exercise devices have limited adjustability in resistance and size, restricting the range of exercises and accommodating different hand sizes, and require tools or disassembly for adjustments.
Innovation Solution
A hand exercise device with adjustable height and resistance, featuring longitudinally slidable and lockable support members, fine internal tension adjustment via knobs, and coarse external adjustment through spring replacement, allowing for customizable resistance and size without tools.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the device uses a fixed housing structure with permanently housed springs, then the device structure is simple and reliable, but the adjustability of resistance range and device size is limited
Solution Approach 1:
The device is divided into modular components: the housing is segmented to allow support member removal, springs are individually accessible, and the support member is a separate adjustable component. This segmentation enables users to modify resistance by replacing individual springs or adjust device size by repositioning support members, thereby improving adaptability without significantly increasing overall structural complexity.
Solution Approach 2:
The support member is designed to be longitudinally slidable and lockable at multiple positions along the housing, transforming a static fixed-structure device into a dynamic adjustable one. This allows the device size to be modified according to different hand sizes and exercise requirements, improving versatility while maintaining structural simplicity through a straightforward sliding and locking mechanism.
2Adaptability or versatility
If the device provides fine internal tension adjustment only, then the device structure remains simple, but the overall resistance range is limited
Solution Approach 1:
Multiple springs with different resistance values are pre-installed in the device, allowing users to quickly switch between different resistance levels by simply replacing springs rather than performing complex adjustments. This preliminary preparation of multiple spring options significantly expands the overall resistance range while keeping the adjustment process simple and tool-free.
Solution Approach 2:
The device incorporates both fine internal tension adjustment (changing the resistance parameter continuously within a range) and coarse external adjustment through spring replacement (changing the resistance parameter to discrete predetermined values). This dual approach to parameter change provides a comprehensive resistance range while maintaining simplicity in both adjustment mechanisms.
3Adaptability or versatility
If the device is designed for a specific hand size, then the device structure is optimized and simple, but it cannot accommodate users with different hand sizes
Solution Approach 1:
The support member is designed to be longitudinally slidable and lockable at multiple positions along the housing, transforming a static fixed-structure device into a dynamic adjustable one. This allows the device size to be modified according to different hand sizes and exercise requirements, improving versatility while maintaining structural simplicity through a straightforward sliding and locking mechanism.
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
Enables a wide range of resistance options and accommodates various hand sizes, enhancing usability for strength training and rehabilitation with optional callus-building exercises.
Implementation Method 1
Each compressible plunger extends from the housing in a longitudinal direction in operable communication with one elongate chamber and is biased away from the housing
Implementation Method 2
A tension adjustment member is operatively associated with each compressible plunger for varying the bias force on the respective plunger
Data Source
AI summary
An exercise device for compression exercises is adjustable in height and in compression force. The device includes a central housing and a plurality of plungers extending from a top side. A support member is attached to the housing on a bottom side. The support member is movable longitudinally relative to the housing and plungers from a fully retracted position to a fully extended position and is lockable in a plurality of intermediate longitudinal positions to vary the height of the device. Each plunger is operatively associated with an internal bias member that biases the plunger away from the housing. Resistance force on a plunger is adjustable via changing tension of the associated bias member with an adjustment knob to finely adjust tension. An installed bias member is removable and replaceable with a different bias member to coarsely adjust tension.