Hand Grip Four-Bar Linkage for Uniform Palm Force Distribution
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Solution Overview
Problem
Conventional hand grips with rotatably coupled operating arms do not uniformly disperse power across the palm during exercise, leading to inefficient muscular strength training.
Innovation Solution
A hand grip design featuring connected operating arms with inclined connection arms and a spring member that provides elastic force, allowing for parallel approach and separation movements, with adjustable strength and gap settings via a rotating engaging member and rotation restriction mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If operating arms are rotatably coupled to a hinge point, then the structure is simple, but power is not uniformly dispersed throughout the palm during exercise
Solution Approach 1:
The operating arms are divided into multiple segments connected by link arms instead of a single hinge point. The first and second operating arms are connected through first and second link arms to form a four-bar linkage mechanism, which segments the rotational motion and distributes force uniformly across the palm surface during gripping exercise.
2Device complexity
If the spring member position is fixed, then the structure is simple, but the elastic force strength cannot be adjusted according to user muscular strength
Solution Approach 1:
The spring member position is made adjustable through a strength adjusting part that includes a rotating engaging member and a moving part. The rotating engaging member can rotate within the spring connection part to move the spring member along the link arm, dynamically changing the spring's effective length and thus the elastic force strength according to user needs.
Solution Approach 2:
The elastic force strength is adjusted by changing the position parameter of the spring member along the link arm. The strength adjusting part allows the spring member to be positioned at different locations, which changes the spring's compression distance and thereby adjusts the elastic force magnitude to match different user muscular strength levels.
3Ease of operation
If the operating arms are connected in parallel, then power dispersion is improved, but the device complexity increases with additional connection arms
Solution Approach 1:
The first and second link arms are configured with asymmetric orientations relative to the operating arms. The first link arm connects the first operating arm to the second operating arm, while the second link arm connects the second operating arm to the first operating arm, creating a symmetric four-bar linkage that provides uniform power dispersion through asymmetric geometric arrangement.
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
Uniform power dispersion across the palm during exercise, allowing for customizable strength and gap adjustments to suit individual user strength and hand size, enhancing the effectiveness of muscular strength training.
Implementation Method 1
a spring member installed to provide an elastic force in a direction interfering with approach of the first operating arm and the second operating arm
Data Source
AI summary
Provided is a hand grip including a first and second operating arms capable of moving toward and away from each other, a first and second connection arms disposed between the first and second operating arms to be inclined, of which both ends rotatably connected to the first and second operating arms, a spring member installed to provide an elastic force in a direction interfering with approach of the first and second operating arms, a spring fixing part formed to extend upward from the first operating arm and to which one end of the spring member is fixed, a spring connection part formed to extend from an upper end of the first connection arm and to which the other end of the spring member is fixed, and a strength adjusting part formed in the spring connection part and configured to allow the other end of the spring member to move.