Counterbalanced Exercise Beam With Adjustable Resistance
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Solution Overview
Problem
Existing exercise devices are limited in their ability to effectively develop or restore targeted body parts and muscles, particularly for users with physical limitations, injuries, or those undergoing medical therapy, as they do not allow for precise adjustment of resistance and are not suitable for medically supervised physical therapy regimens.
Innovation Solution
An exercise device featuring a counterbalanced elongate beam with adjustable weights and a dynamic tension device, allowing for independent variation of beam imbalance and overall mass, along with an infinitely adjustable weight assembly and a semi-circular member for angular position indication, enabling precise control of resistance and user manipulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing exercise devices are used, then basic exercise function is provided, but precise adjustment of resistance is not possible and they are not suitable for medical therapy
Solution Approach 1:
The exercise device is segmented into multiple independent adjustment mechanisms: (1) counterweights on the elongate beam for resistance adjustment, (2) spring mechanism for additional resistance control, (3) adjustable forearm pad position, and (4) selectable range of motion limits. This segmentation allows precise customization for medical therapy while keeping each component relatively simple.
Solution Approach 2:
The device incorporates dynamic adjustment capabilities where the counterweights can be repositioned along the elongate beam to vary resistance, the spring tension can be adjusted, and the range of motion can be dynamically limited during exercise. This dynamic adaptability enables the device to suit different medical therapy stages and patient capabilities.
2Manufacturing precision
If fixed resistance exercise devices are used, then device simplicity is maintained, but precise control of resistance for targeted muscle development is not achieved
Solution Approach 1:
Counterweights are attached to the elongate beam at adjustable positions to create a counterbalancing moment that precisely controls the resistance experienced by the user. By varying the counterweight mass and position, the resistance can be precisely tuned for different muscle groups and therapy requirements, while the counterweight mechanism itself remains mechanically simple.
Solution Approach 2:
The device allows continuous variation of resistance parameters through counterweight repositioning along the beam and spring tension adjustment. This parameter change capability enables precise resistance control for targeted muscle development without requiring complex electronic or mechanical systems.
3Adaptability or versatility
If adjustable counterweights are added to the elongate beam, then resistance adjustment capability is improved, but device complexity increases
Solution Approach 1:
The elongate beam serves multiple functions: it acts as the lever arm for exercise, carries the counterweights for resistance adjustment, provides mounting for springs, and includes markings for range of motion measurement. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity despite adding resistance adjustment capability.
4Reliability
If range of motion is limited for safety, then user safety is improved, but exercise effectiveness may be reduced
Solution Approach 1:
The range of motion limitation is dynamic and adjustable rather than fixed. Stops can be positioned at different locations along the arc of motion, allowing the safe range to be expanded as the user's strength and mobility improve. This dynamic adjustment maintains safety while progressively enhancing exercise effectiveness.
Solution Approach 2:
The device provides different quality characteristics at different portions of the range of motion: early in the range, lighter resistance and softer spring tension protect vulnerable areas, while later in the range, full resistance and stiffer spring tension maximize muscle activation. This localized quality variation ensures both safety and effectiveness throughout the exercise.
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 device provides a customizable and therapeutic means to develop targeted musculature, allowing for precise adjustment of resistance and range of motion, making it suitable for users with physical limitations and enhancing the effectiveness of medical therapy exercises.
Implementation Method 1
a spring mechanism, the leaves of which are affixed to the bottom of the plate
Implementation Method 2
The counterbalanced elongate beam assembly includes a first set of weights selectively positionable at a first end of the beam and a second set of weights selectively positionable at a second end of the beam
Implementation Method 3
a pivot assembly interconnecting the elongate beam to the seat support structure for limited rotation with respect to each other
Data Source
AI summary
An apparatus for the development of upper body parts and muscles is disclosed. The apparatus includes a base on which is mounted a seat supported above the base and a forearm pad disposed forward of the seat and supported above the base. A pivoted lever is pivoted at a first end to a seat support, a second end of the lever extends past the forearm pad a distance and includes a weight supporting pin which extends vertically upward. A lifting device is selectively and pivotally attached to the pivoted lever forward of the forearm rest. A plurality of weights are selectively attached to the weight support pin to vary the amount of force required to use the lifting device and raise the weights. A variety of attachments are selectively affixed to the lifting device to exercise various body parts and muscles.