Safety Socket Contact Structure for Oblique Insertion Shock Prevention
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Solution Overview
Problem
Existing safety sockets are prone to electric shock risks due to foreign objects being inserted into the socket holes, especially when the object matches the socket size or is inserted obliquely, despite having movable contact pieces to prevent such insertions.
Innovation Solution
A safety socket design featuring symmetrically arranged electrical connecting components with a movable contact piece and insulating pressing rod, requiring simultaneous alignment and depth insertion to establish electrical connection, incorporating a lever mechanism to ensure safe conduction only when standard plugs are inserted.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a movable contact piece of elastic structure is used to prevent electric shock, then safety is improved, but the risk of electric shock from foreign objects matching socket size or inserted obliquely increases
Solution Approach 1:
The contact piece is divided into two functionally independent parts: an insulating portion corresponding to the inner side of the plughole and a conductive portion on the outer side. This segmentation ensures that foreign objects must simultaneously satisfy multiple conditions (pushing the insulating portion outward while maintaining proper alignment and depth) to establish electrical connection, thereby reducing the risk of electric shock from mismatched or obliquely inserted objects.
Solution Approach 2:
The insulating portion of the movable contact piece acts as an intermediary between the foreign object and the conductive portion. It serves as a safety barrier that must be displaced along with the conductive portion, adding an extra layer of protection against improper insertion while still allowing legitimate plug insertion to establish electrical connection.
2Ease of operation
If the movable contact piece is made to move outward for conduction, then ease of operation is improved, but the precision required for safe conduction increases
Solution Approach 1:
The contact piece is designed as a movable component that can dynamically shift outward when force is applied. This dynamic behavior allows the socket to automatically respond to insertion attempts: legitimate plugs naturally push the contact piece outward to establish connection, while foreign objects fail to do so properly due to size or shape mismatches, thereby achieving both ease of operation and safety through motion-based differentiation.
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
Significantly reduces the risk of electric shock by ensuring that foreign objects must meet precise alignment and depth conditions for conduction, and the insulating inner side of the movable contact piece prevents shocks from non-standard insertions, enhancing overall safety.
Implementation Method 1
a spring that can elastically lift it up and down
Implementation Method 2
a torsion spring sleeved on the rotating shaft and used to provide elastic force for the movable contact piece
Implementation Method 3
the conductive portion is electrically connected with at least one of the static contact pieces, when the movable contact piece is reset outward to a standard width position of the plughole, the conductive portion can be in contact and conducted with the static end of the connecting terminal
Data Source
AI summary
The present disclosure provides a safety socket, in which: the electrical connecting component includes a fixed terminal, a plughole component including three static contact pieces and a movable contact piece enclosing a plughole, an elastic component forcing the movable contact piece to deviate to the inner side of the plughole, and a connecting terminal for dynamically electrically connecting the plughole component and the fixed terminal; the bottom of the plughole component is provided with a liftable pressing rod, and when the pressing rod is pressed down, the connecting terminal and the fixed terminal can be forced to contact and conduct through a lever component.