Jack Device Dual-Tapered Insertion Port Protection
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Solution Overview
Problem
Existing jack devices fail to effectively protect both the inserted plug and internal terminals from excessive load during insertion and removal, leading to potential damage and reduced durability, especially in applications requiring high reliability like airplanes.
Innovation Solution
The jack device features an insertion portion with a dual-tapered inner surface and strategically located terminals, where the second inner surface is closer to the axis, reducing the angle of plug insertion and minimizing contact with terminals, thus distributing the load more evenly and reducing the risk of overload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the opening is made deeper to accommodate terminals, then the terminals can be positioned further inside, but the plug may come into contact with terminals at excessive angles causing overload
Solution Approach 1:
The opening is designed with different inner surface characteristics at different locations: the first inner surface is tapered to facilitate insertion, while the second inner surface is positioned closer to the axis to provide protection. This local differentiation allows the opening to simultaneously accommodate terminals deeply while protecting them from excessive load during oblique insertion.
Solution Approach 2:
The second inner surface is positioned in advance before the terminal location, creating a protective barrier that intercepts obliquely inserted plugs before they can contact terminals at excessive angles. This preliminary protective structure prevents excessive load before it reaches the terminals.
2Ease of operation
If the opening is made shallower for easier insertion, then plugs can be inserted more easily, but terminals cannot be positioned far enough inside to be protected
Solution Approach 1:
The first inner surface is designed with a taper that facilitates easy insertion, while the second inner surface provides the necessary protection. This local differentiation allows the opening to be sufficiently deep for terminal protection while maintaining ease of insertion through the tapered first surface.
Solution Approach 2:
The opening is segmented into two functional zones: the first inner surface zone for facilitating insertion and the second inner surface zone for protection. This segmentation allows each zone to optimize its specific function without compromising the other.
3Ease of operation
If the first inner surface is tapered to facilitate insertion, then plugs can be inserted easily, but the angle of insertion may become too large causing plug contact with terminals at excessive angles
Solution Approach 1:
The second inner surface acts as an intermediary barrier between the obliquely inserted plug and the terminals. It intercepts plugs that are inserted at excessive angles and redirects them to approach the terminals at appropriate angles, preventing harmful excessive angle contact while maintaining ease of insertion through the tapered first surface.
Solution Approach 2:
The second inner surface provides preliminary counter-action to oblique insertion by intercepting plugs before they can contact terminals at excessive angles. This preliminary protective action prevents the harmful effect of excessive angle contact while allowing easy insertion through the first tapered surface.
Data Source
AI summary
A jack device includes an insertion portion configured to receive a plug through an open end along a first axis. The insertion portion has an opening and a terminal. The opening has a predetermined depth from the open end to an inside of the insertion portion. The opening has a first inner surface that is increasingly away from the first axis from the inside to the open end, and a second inner surface whose distance from a certain point on the first axis is shorter than a distance between the first inner surface and the certain point. The terminal is located further inside than the opening in a direction of the first axis and is opposite to the second inner surface in a direction crossing the first axis. The terminal comes into pressure contact with the plug when the plug is inserted into the insertion portion.