Retractable Stop Pins for Symmetrical DIP Loading
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Solution Overview
Problem
Conventional IC magazines often require manual reorientation and additional handling steps due to DIPs being misplaced, leading to increased cycle time and yield loss during transfer between testing and packaging equipment.
Innovation Solution
The introduction of retractable stop pins at both ends of the IC magazine allows for symmetrical loading and unloading, eliminating the need for reorientation and reducing handling steps by allowing DIPs to be loaded and removed from either end, using a spring-actuated L-shaped push rod mechanism or magnetically controlled retractable pins.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional IC magazines use fixed stop pins at one end, then DIPs are prevented from falling out, but manual reorientation and additional handling steps are required
Solution Approach 1:
The patent applies the dynamics principle by making the stop pins retractable rather than fixed. The stop pins can extend to prevent DIPs from falling out during transport, and retract to allow DIPs to be removed from either end of the magazine. This dynamic configuration eliminates the need for manual reorientation and reduces handling steps, directly resolving the contradiction between reliability and cycle time.
2Reliability
If conventional IC magazines have stop pins at one end only, then DIPs are secured, but symmetrical loading and unloading is not possible
Solution Approach 1:
The patent applies the universality principle by providing retractable stop pins at both ends of the magazine. This allows the magazine to be loaded and unloaded from either end, providing symmetrical operation and reducing handling steps. The stop pins maintain their securing function while enabling flexible operation from both ends.
3Manufacturing precision
If manual reorientation is required for DIPs, then proper orientation is achieved, but yield loss occurs during transfer
Solution Approach 1:
The patent applies the preliminary action principle by pre-positioning retractable stop pins at both ends of the magazine slots. This preliminary configuration allows DIPs to be properly oriented and secured before transfer operations begin, eliminating the need for manual reorientation during transfer and preventing yield loss from handling damage.
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
This solution reduces cycle time and minimizes DIP damage by enabling efficient and oriented transfer of DIPs, thereby reducing scrap and improving operational efficiency.
Implementation Method 1
A spring inside the cavity between the underside of the short segment and the bottom of the cavity holds the retractable stop pin in an up position
Implementation Method 2
The long segment of an L-shaped push rod projects through an opening from the cavity through the magazine rail. The short segment of the L-shaped push rod is coupled to the bottom of the retractable stop pin inside the cavity
Data Source
AI summary
An IC magazine with retractable stop pins at both ends of the IC magazine. The retractable stop pins project into the magazine slot through an opening from a cavity in the base of the IC magazine. The long segment of an L-shaped push rod projects through an opening from the cavity through the magazine rail. The short segment of the L-shaped push rod is coupled to the bottom of the retractable stop pin inside the cavity. A spring inside the cavity between the underside of the short segment and the bottom of the cavity holds the retractable stop pin in an up position. An IC magazine with retractable stop pins at both ends of the IC magazine. The retractable stop pins project into the magazine slot through an opening from a cavity in the base of the IC magazine. A stop collar surrounding the retractable stop pin inside the cavity. A spring inside the cavity that pushes up on the underside of the stop collar and pushes down on the bottom of the cavity.