Tamper-Resistant Outlet With De-Energized Contacts
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Solution Overview
Problem
Existing electrical outlets are prone to electrical shock risks due to small conductive objects like paperclips or screwdrivers accessing live electrical contacts, and access-restricting outlets face issues with wear and damage from high insertion forces.
Innovation Solution
A tamper-resistant electrical outlet design that maintains live electrical contacts in a non-energized state by default, energizing them only when compatible objects are inserted into different outlet openings, using actuators to establish electrical connections upon proper plug insertion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If access-blocking structures are used to prevent insertion of small objects, then safety against electrical shock is improved, but the outlet becomes prone to wear and damage from high insertion forces
Solution Approach 1:
Instead of blocking access to electrical contacts with mechanical structures, the patent inverts the approach by keeping contacts accessible but controlling their electrical state. The outlet maintains receptacle openings without access-blocking structures, and instead uses actuators to control whether contacts are energized or not, eliminating wear from mechanical blocking while maintaining safety.
Solution Approach 2:
The patent replaces the mechanical access-blocking system with an electrical control system. Rather than using movable shutters or sliders that physically block contacts, the invention uses actuators controlled by detection mechanisms to control the electrical energization state, substituting mechanical protection with electrical state management.
2Object-affected harmful factors
If access-blocking structures are used to restrict insertion, then safety is improved, but operational complexity and susceptibility to wear increase
Solution Approach 1:
The patent extracts the access-blocking function from the physical structure and removes it entirely. The receptacle openings remain open without any blocking structures, and the safety function is achieved by controlling the electrical energization state of contacts through actuators, completely eliminating the complexity of mechanical blocking mechanisms.
Solution Approach 2:
The patent introduces actuators as intermediary components between the detection mechanism and the electrical contacts. These actuators control the energization state of contacts based on whether proper plug insertion is detected, serving as a mediator that enables safety without requiring physical access-blocking structures.
3Productivity
If live contacts are continuously energized, then power availability is improved, but safety risk from small conductive objects increases
Solution Approach 1:
The patent makes the electrical energization state dynamic rather than static. Contacts are not continuously energized but instead change their energization state based on real-time detection of proper plug insertion. This dynamic control allows the outlet to provide power when needed while maintaining safety by keeping contacts de-energized when no proper plug is inserted.
Solution Approach 2:
The patent performs preliminary detection of proper plug insertion before energizing the contacts. The detection mechanism identifies whether a compatible object is inserted, and only after this preliminary verification does the actuator energize the contacts, ensuring safety before power delivery.
Data Source
AI summary
A tamper resistant electrical outlet maintains its electrical contacts in a non-energized state until an object is inserted into an outlet opening for a different electrical contact. In this way, an object contacting the electrical contact behind one contact opening will not be subjected to electrical current unless another object is simultaneously inserted sufficiently far into another outlet opening. Insertion of an object, such as the prong of an electrical plug, into either outlet opening will move an actuator, thereby moving a respective live contact toward the electrical contact that is associated with the other outlet opening. Although the electrical outlet does not preclude objects from being inserted into its outlet openings and engaging the associated electrical contacts, only by simultaneous insertion of two different objects (such as two prongs of an electrical plug) into the different outlet openings will the electrical contacts become energized.