Hand Grip Exerciser With Threaded Screw Resistance Adjustment
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Solution Overview
Problem
Existing hand grip exercisers lack a simple and effective means to adjust resistive force, requiring multiple devices or springs to provide a range of exercises, which is cumbersome and inefficient.
Innovation Solution
A hand grip exerciser device with pivotally interconnected arms and a threaded screw mechanism that adjusts the length of a resistance providing element, such as a helical coil spring or elastomeric compound, to easily modify the resistive force applied during rotation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a simple coiled spring is used without adjustment means, then the device structure is simple, but the resistive force cannot be adjusted requiring multiple devices
Solution Approach 1:
The spring length is made adjustable through a threaded rod mechanism that allows dynamic modification of the spring's effective length. The threaded rod engages with the spring and can be rotated to extend or compress the spring, thereby dynamically adjusting the resistive force to accommodate different exercise intensities and user needs.
Solution Approach 2:
The resistive force parameter is changed by modifying the spring length. By rotating the threaded rod, the spring length parameter varies, which directly changes the spring constant and the resulting resistive force. This allows a single device to provide multiple resistance levels through parameter adjustment rather than requiring multiple fixed devices.
2Adaptability or versatility
If multiple springs or devices are used to provide a range of exercises, then the resistive force range is sufficient, but the device complexity and quantity increase
Solution Approach 1:
A single hand grip exerciser is designed to perform multiple functions by incorporating an adjustable spring length mechanism. The threaded rod allows the same spring to provide multiple resistance levels, making one device universal for various exercise intensities rather than requiring multiple specialized devices for different resistance levels.
Solution Approach 2:
The adjustment mechanism is merged with the spring assembly itself. The threaded rod integrates with the spring ends, combining the resistance element and adjustment mechanism into a unified structure. This merging eliminates the need for separate adjustment devices or multiple springs, reducing overall system complexity while maintaining exercise range.
3Ease of operation
If adjustment positions are provided with pins and holes, then the resistive force can be adjusted, but the adjustment is not smooth and precise
Solution Approach 1:
The discrete pin-and-hole mechanical adjustment system is replaced with a threaded rod mechanism. Instead of moving between fixed discrete positions, the threaded rod allows continuous rotational adjustment that translates to precise linear positioning of the spring. This substitution provides both smooth operation through rotation and precise adjustment through the fine threading pitch.
Solution Approach 2:
The adjustment mechanism transitions from static discrete positions (pins in holes) to dynamic continuous adjustment (threaded rod rotation). The user can rotate the threaded rod to achieve any desired spring length within the adjustment range, providing smooth and precise control over the resistive force rather than being constrained to fixed positions.
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 smooth and precise adjustment of resistive force, allowing for a wide range of exercises with a single device, enhancing user experience and exercise variability without the need for multiple devices or springs.
Implementation Method 1
a threaded screw having a longitudinal axis around which it rotates, the screw attached at a first end to the resistance providing element and engaging a threaded nut mounted on the second mounting portion of the second arm and the screw having at a second end a means to facilitate its rotation, the screw rotatable about its longitudinal axis to move along it in relation to the threaded nut
Implementation Method 2
a resistance providing element providing a resistive force against rotational movement of the arms
Implementation Method 3
the resistance providing element has a longitudinal axis which is parallel to the longitudinal axis of the screw... in which the resistance providing means is a helical coil spring
Implementation Method 4
in which the resistance providing means is an elastomeric compound... in which the resistance providing means is a rubber based compound
Data Source
AI summary
A handgrip exerciser device has two pivotally interconnected arms. Each arm has a first end region, a central region and a second end region. Each arm has at its first end region a hand grip. The central region forms a pivot pin receiving area. A pivot pin extends between the two arms enabling the arms to be rotatably connected together. Each arm having at its second end region a mounting portion. A resistance element providing a resistive force against rotational movement of the arms and having first and second ends. A first arm mounting portion supports the first end of the resistance element providing element. A second arm mounting portion supports the second end of the resistance element. An adjustment element adjusts the resistive force applied by the resistance element to the rotation of the two arms around the pivot pin.