Telescopic Power Plug with Rotating Handle for Pin Protection
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Solution Overview
Problem
Conventional chargers with fixed or movable pins face issues of pin exposure leading to scratches and instability when in use, as well as lack of a stable position for pins when not in use.
Innovation Solution
A telescopic power plug design featuring a rotating handle, annular groove, and interconnected shrapnels and shrapnels that allow pins to retract and extend stably, ensuring secure engagement with sockets and protection when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If pins are made fixed and protrude from the plug body, then the charger structure is simple, but objects close to the pins have a chance to be scratched by the pins
Solution Approach 1:
The patent applies the dynamics principle by making the pins movable rather than fixed. The pins can rotate between an extended position (for charging) and a retracted position (for protection). This dynamic mechanism resolves the contradiction by allowing the pins to be exposed only when needed, eliminating the scratch hazard during storage while maintaining structural simplicity through a straightforward rotational movement system with guide grooves and positioning structures.
Solution Approach 2:
The patent applies the nesting principle by having the pins rotate into the plug body cavity when not in use. The pins are nested within the plug body during storage, with the pin tips retracting into the internal space of the plug. This nesting mechanism protects the pins from causing scratches to surrounding objects while maintaining ease of manufacture through a simple rotational retraction design.
2Object-affected harmful factors
If pins rotate or slide in the groove to be hidden in the plug body, then pin protection is improved, but both of them have no block position to stay still without moving when being used, and the pins inserted into the socket are unstable
Solution Approach 1:
The patent applies dynamics by implementing a rotational mechanism with defined positional states. The pins can rotate to specific blocked positions: extended position for stable socket insertion and retracted position for protection. The rotational system includes guide grooves and positioning structures that ensure the pins stay stable in both extended and retracted states, resolving the contradiction between protection and stability.
Solution Approach 2:
The patent applies self-service through the automatic positioning mechanism. When the pins are rotated to the extended position, the guide grooves and positioning structures automatically block the pins at the correct orientation for stable socket insertion. The system self-regulates to ensure stability during use without requiring external intervention, while also providing automatic protection when retracted.
3Object-affected harmful factors
If pins are made movable and can be hidden in the plug body, then pin protection is improved, but the pins have no block position to stay still without moving when being used
Solution Approach 1:
The patent applies dynamics through a rotational mechanism that provides defined blocked positions. The pins can rotate freely during operation but are automatically blocked at specific positions: extended position for charging and retracted position for protection. This dynamic system with automatic positioning resolves the contradiction by ensuring stability during use while maintaining retraction capability for protection.
Solution Approach 2:
The patent applies self-service through the automatic blocking mechanism. When the pins are rotated to the extended position, the guide grooves and positioning structures automatically block the pins at the correct orientation, ensuring stable insertion into the socket. The system self-regulates to provide both protection when retracted and stability when extended, without requiring external control.
Data Source
AI summary
A telescopic power plug includes a handle, a plug body and an inner sleeve. The handle is threadedly engaged with the plug body. The plug body with an irregular shape end is engaged with an irregular shape end of the inner sleeve. The irregular shape engagement makes the plug body movement produced only in the axial direction. The plug body is extended or retracted in the inner sleeve by rotating the handle. The handle operation force is uniform and stable.