Elastic Pull Test Apparatus for Consistent Handle Force
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Solution Overview
Problem
Conventional pull testing methods for electronic device handles are inaccurate due to user variability in applying force direction, amount, and speed, affecting the consistency of testing results.
Innovation Solution
A pull test apparatus featuring a tension meter connected to a handle via a linkage assembly with an elastic element and positioning element, allowing the tension meter to move between positions driven by elastic force, ensuring consistent initial positions and force application for improved accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a user manually pulls the tension meter to test the handle, then the testing can be performed, but the force direction, amount, and speed vary between tests reducing accuracy
Solution Approach 1:
The elastic element automatically propels the tension meter from the first position to the second position without requiring manual operation. The system uses stored elastic potential energy to self-drive the testing process, eliminating human variability in force application while maintaining consistent testing parameters across all tests.
Solution Approach 2:
The elastic element is pre-loaded with potential energy before each test by positioning the tension meter at the first position where the positioning element engages. This preliminary energy storage ensures that each test begins with identical force conditions, guaranteeing consistency in force direction, amount, and speed throughout the testing process.
2Measurement precision
If the tension meter is manually pulled each time, then testing can be performed, but the initial position varies affecting result consistency
Solution Approach 1:
The patent replaces complex active positioning mechanisms (motors, sensors, controllers) with a simple passive mechanical positioning element that uses elastic force and geometric constraints to automatically return the tension meter to the first position. This mechanical self-positioning system achieves precise repeatability without requiring complex control systems.
3Measurement precision
If elastic force is used to drive the tension meter, then force application consistency is improved, but additional linkage components are required
Solution Approach 1:
The linkage assembly serves multiple functions simultaneously: it transmits the elastic force from the elastic element to the tension meter, guides the tension meter along the correct path of motion, and provides the positioning function through the positioning element. By combining these functions into a single integrated mechanism, the patent minimizes the number of separate components needed while achieving consistent force application.
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 apparatus ensures consistent force application and direction, enhancing the accuracy of pull testing results by utilizing stored elastic potential energy to position and move the tension meter, reducing user variability in force application.
Implementation Method 1
The elastic element is connected between the base and the tension meter... when the positioning element releases the tension meter, the tension meter moves toward the second position by means of the elastic force of the elastic element
Data Source
AI summary
A pull test apparatus includes a base, a tension meter and a linkage assembly. An object is adapted to be fixed at the base. The tension meter is movably disposed at the base and adapted to connect a handle of the object. The linkage assembly includes an elastic element and a positioning element. The elastic element is connected between the base and the tension meter. When the tension meter resists the elastic force of the elastic element to move to a first position, the positioning element positions the tension meter. When the positioning element releases the tension meter, the tension meter moves toward a second position by means of the elastic force of the elastic element so as to drive the handle closed at a main body of the object to be unfolded from the main body, wherein the first position is between the object and the second position.