Adjustable Chest Expander Gas Spring Positioning Mechanism
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Solution Overview
Problem
Conventional chest expanders lack the ability to adjust the intensity of elastic force according to the user's muscular strength, necessitating the use of different equipment for varying resistance levels.
Innovation Solution
A chest expander design featuring a pair of operational arms and gas springs, where the position of the gas spring ends can be adjusted along longitudinal holes to modify the elastic force, utilizing a guide and holding device system with ratchet sawteeth and elastic support members to facilitate adjustable resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the elastic force intensity is fixed in conventional chest expanders, then the structure is simple, but the adaptability to different user muscular strengths is poor
Solution Approach 1:
The patent makes the gas spring position dynamic and adjustable along the operational arm through a guide mechanism with multiple positioning holes. Users can adjust the gas spring attachment point to different positions to change the elastic force intensity, transforming a static structure into a dynamic one that adapts to different user needs.
Solution Approach 2:
The patent changes the positional parameter of the gas spring attachment point on the operational arm. By providing multiple discrete positioning holes at different distances from the rotation axis, the system allows users to modify the effective lever arm length, thereby changing the elastic force intensity without altering the spring itself.
2Adaptability or versatility
If the gas spring position is adjustable to modify elastic force, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The guide mechanism is segmented into multiple discrete positioning holes along the operational arm. Instead of allowing continuous adjustment, the system divides the adjustment range into specific discrete positions, simplifying the holding mechanism while still providing multiple resistance levels.
Solution Approach 2:
The guide mechanism acts as an intermediary between the gas spring and the operational arm. It provides a structured interface with predefined positioning holes that mediate the adjustment process, making it easier to control and maintain while still achieving the goal of variable elastic force intensity.
3Adaptability or versatility
If multiple chest expanders are used for different intensity levels, then the adaptability is achieved, but the quantity of equipment increases
Solution Approach 1:
The patent makes a single chest expander universal by enabling it to perform multiple functions across different intensity levels. Through the adjustable gas spring position mechanism, one device can serve users with different muscular strengths, eliminating the need for multiple specialized devices.
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 customize the exercise intensity to match their muscular strength by adjusting the gas spring positions, providing a versatile and effective workout experience without the need for multiple devices.
Implementation Method 1
a pair of gas springs disposed crosswise between the pair of operational arms and configured to provide elastic force in a direction in which the pair of operational arms are spaced apart from each other
Implementation Method 2
an elastic support member arranged on the support plate and configured to elastically support the pole to retain the pole at the engagement positions
Data Source
AI summary
Provided is a chest expander including a pair of operational arms having upper ends rotatably coupled to a head and moving to approach or be spaced apart from each other and a pair of gas springs disposed crosswise between the pair of operational arms. In the operational arm, a longitudinal hole configured to guide one end of the gas spring to move are formed. A guide coupled to the one end of the gas spring are arranged in the longitudinal holes. A Holding device holds the guide at a selected position. Intensity of elastic force provided by the gas spring is adjustable by adjusting a position of the one end of the gas spring.