Chair-type upper body exercise device
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Solution Overview
Problem
There is a growing need for effective exercise devices that can accommodate users with joint issues and cater to home fitness needs, particularly in a society where exercising is inconvenient due to aging or health concerns, and existing devices do not adequately address the requirement for adjustable resistance and user-friendly operation.
Innovation Solution
A chair-type upper body exercise device with a motor-driven system that adjusts the twining of strings and elastic bands to provide variable resistance, allowing users to perform arm, shoulder, and chest exercises by gripping handles, with a controller to set exercise intensity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a motor-driven system with strings and elastic bands is used to provide adjustable resistance, then exercise intensity and adaptability are improved, but device complexity increases
Solution Approach 1:
The motor is positioned inside the back support portion, and the strings are routed through guides and splitters that are nested within the back support structure. The elastic bands are connected to the strings and extend to the handles, creating a nested arrangement where components are housed within each other to minimize space and reduce apparent complexity while maintaining adjustability
Solution Approach 2:
The motor-driven system serves multiple functions: it adjusts the resistance level for different exercise intensities, controls the twining of strings to vary elastic band tension, and enables various upper body exercises (arm, shoulder, chest) using the same basic mechanism. This multi-functionality improves adaptability without proportionally increasing complexity
2Adaptability or versatility
If the motor head rotates to twine strings together, then resistance adjustment capability is improved, but mechanical complexity increases
Solution Approach 1:
The motor head is designed to rotate in both directions dynamically. Rotation in the first direction twines the first and second strings together to increase resistance, while rotation in the opposite direction untwines them to decrease resistance. This dynamic bidirectional rotation provides continuous resistance adjustment capability while using a single mechanical component rather than multiple fixed mechanisms
Solution Approach 2:
The guides are positioned to preliminarily align and direct the strings toward the motor head, and the splitters are pre-positioned to support the strings at appropriate locations. This preliminary arrangement of components simplifies the motor head's task to only rotating and twining/untwining the strings, reducing the mechanical complexity of the resistance adjustment 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 users to perform various exercises with adjustable resistance, enhancing exercise intensity and convenience, accommodating users with joint issues and meeting the demand for home fitness solutions.
Implementation Method 1
a motor inside the back support portion; a first string, of which an end is connected, directly or indirectly, to the motor and the other end is outside the back support portion; a second string, of which an end is connected, directly or indirectly, to the motor
Implementation Method 2
a first elastic band connected, directly or indirectly, to the first string; and a second elastic band connected, directly or indirectly, to the second string
Data Source
AI summary
A chair-type upper body exercise assistance device may include: a chair comprising a buttocks support part which can support the buttocks of a user, a back support part which is connected to the buttocks support part and can support the back of the user, and a plurality of legs connected to the buttocks support part; a motor arranged inside the back support part; a first string one end of which is connected to the motor and the other end of which is provided on the outside of the back support part; a second string one end of which is connected to the motor, at a position spaced apart from the first string, and the other end of which is provided on the outside of the back support part; a first splitter which is arranged inside the back support part, is provided at a position spaced apart from the motor, and supports the first string; and a second splitter which is arranged inside the back support part, is provided at a position spaced apart from the motor, and supports the second string; a first elastic band connected to the first string; and a second elastic band connected to the second string.