Test Jig Pressure Sensor Feedback for Key Depression Accuracy
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Solution Overview
Problem
Existing test jigs for electronic products, such as tablet computers and mobile phones, lack control over the pressing force of key depression test heads, leading to potential key damage or inaccurate results, and cause wear and tear on flex circuit terminals during circuit testing.
Innovation Solution
Incorporating a pressure sensor on the key depression test head to control the pressing force within a specified range and using test needles with suction and clamping devices to stabilize flex circuits during circuit testing, ensuring accurate and stable contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cylinder is used to drive the key depression test head, then the test head can move to press the keys, but the pressing force cannot be controlled leading to key damage or inaccurate results
Solution Approach 1:
A pressure sensor is installed on the key depression test head to detect the pressing force in real-time. The sensor provides feedback to a control system that adjusts the cylinder's driving force to maintain the pressing force within a predetermined range, ensuring accurate test results while preventing key damage
Solution Approach 2:
The patent replaces the simple mechanical cylinder-driven system with a more sophisticated system that incorporates a pressure sensor and control mechanism. This substitution transforms the purely mechanical system into a controlled system that can precisely regulate pressing force, resolving the contradiction between simplicity and control accuracy
2Reliability
If male and female terminals are used for circuit testing, then connections can be established, but wear and tear occurs on the flex circuit terminals
Solution Approach 1:
The patent uses test needles as disposable or replaceable components that make contact with the flex circuit terminals. Instead of using durable male-female terminal pairs that wear each other, the test needles are designed to be replaced when worn, preserving the integrity of the product's flex circuit terminals while maintaining reliable test connections
Solution Approach 2:
The test needles act as an intermediary between the testing equipment and the flex circuit terminals. This intermediary approach allows electrical contact to be made without the mechanical interlocking of male-female terminals, reducing wear and tear on the product's terminals while maintaining connection stability during testing
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 pressure sensor ensures controlled key depression tests without damaging the product, while the needle and suction systems provide stable circuit connections, preventing wear and ensuring accurate test results.
Implementation Method 1
a pressure sensor equipped on the key depression test head of the key testing unit
Implementation Method 2
appropriate suction and clamping devices are used to stabilize the flex circuits of the product under test
Data Source
AI summary
An electronic product test jig includes a key testing unit and a circuit testing unit. The key testing unit includes: an X-axis mechanical arm, a Y-axis mechanical arm, a depression mechanical arm that are connected in succession; wherein the X-axis mechanical arm; and a key depression test head disposed at one end of the depression mechanical arm. The X-axis mechanical arm, the Y-axis mechanical arm, and the depression mechanical arm are configured to drive the key depression test head to move and fall over key positions of a product under test so as to complete the test of keys through the key depression test head. A pressure sensor is disposed on the key depression test head.