Telescopic Adapter Plug Structure for Shorter Pin Extension Stroke
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Solution Overview
Problem
Existing power adapter plugs require a large space and volume due to the need for two stages of stroke to extend plug pins, hindering miniaturization.
Innovation Solution
A telescopic structure with a plug sleeve and plug pin assembly, featuring a fixing rod, first and second rockers, and a driving chute, allowing the plug pin assembly to achieve two stages of displacement with one stage of push tab stroke through varying rocker angles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the push tab is designed to complete two stages of stroke to extend plug pins, then the plug pins can be fully extended for use, but the plug requires large space and volume
Solution Approach 1:
The patent applies dynamics by using rockers that change their included angle during operation. The first and second rockers are hinged together, allowing the included angle between them to increase as the plug sleeve extends, transforming the single-stage linear motion into a two-stage motion sequence without requiring additional space
Solution Approach 2:
The driving protrusion on the first rocker acts as an intermediary element that interacts with the driving chute on the plug sleeve. As the plug sleeve extends, the driving protrusion slides along the driving chute, converting the linear displacement into angular change of the rockers, which then drives the plug pin assembly outward
2Volume of moving object
If the push tab stroke is shortened to reduce plug volume, then the plug achieves compact size, but the plug pin assembly cannot complete two stages of displacement
Solution Approach 1:
The dynamic change in the included angle between the first and second rockers allows the system to amplify the displacement effect. As the included angle increases during plug sleeve extension, the second rocker pushes the plug pin assembly outward with increased leverage, achieving full pin extension despite the shortened push tab stroke
Solution Approach 2:
The patent changes the geometric parameter of the rocker linkage by varying the included angle between the first and second rockers during operation. This parameter change transforms the mechanical advantage ratio dynamically, enabling the system to achieve greater output displacement than the input stroke would normally permit
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 structure reduces the required space for the push tab movement, facilitating miniaturization by enabling the plug pin assembly to extend with a shorter stroke, thus reducing the overall product volume.
Implementation Method 1
a driving protrusion, and the driving protrusion can be slidably mounted on the driving chute; when the plug sleeve slides out of the housing, the driving protrusion slides from a first end of the driving chute to a second end of the driving chute, an included angle between the first rocker and the second rocker increases
Data Source
AI summary
A telescopic structure of a power adapter plug is disclosed, which includes a housing, a push tab, a plug sleeve and a plug pin assembly, the plug sleeve being slidably mounted to the housing in a Z-axis direction, and the push tab being mounted to the plug sleeve; and further includes a fixing rod, a first rocker and a second rocker hingedly connected successively, where one end of the fixing rod away from the first rocker is fixed to the housing, and one end of the second rocker away from the first rocker is hingedly connected to the plug pin assembly, and the plug sleeve is provided with a driving chute; one end of the first rocker away from the fixing rod is provided with a driving protrusion, and the driving protrusion can be slidably mounted on the driving chute.