Connector Contact Prevention Part and Shield Shell Design
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Solution Overview
Problem
Conventional connectors fail to effectively prevent finger contact with terminal fittings during detachment from mating connectors, which can lead to accidental exposure and potential electrical hazards.
Innovation Solution
A connector design featuring a tubular first housing member with an insertion hole and a second housing member that includes a terminal housing chamber, a terminal holding part, and a contact prevention part to prevent finger contact, along with a conductive shield shell to suppress noise intrusion and secure the components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the connector is designed to be detachable from the mating connector, then the ease of operation is improved, but the safety deteriorates due to potential finger contact with terminal fittings during detachment
Solution Approach 1:
A finger stopper is introduced as an intermediary component between the terminal fitting and the operator's finger. The finger stopper protrudes from the housing and physically blocks finger access to the terminal fitting, preventing accidental contact while maintaining the detachable connection functionality
Solution Approach 2:
The finger stopper is positioned in advance to prevent the harmful action of finger contact before it can occur. By protruding from the housing near the terminal fitting, it creates a preliminary barrier that stops fingers from reaching the electrical contacts during the detachment operation
2Object-affected harmful factors
If multiple terminal fittings are covered with one shield shell, then the noise suppression is improved, but the device complexity increases
Solution Approach 1:
Multiple terminal fittings are grouped together and covered by a single common shield shell, merging their individual protective requirements into one unified structure. This reduces the total number of separate shielding components while maintaining effective noise suppression for all terminal fittings
Solution Approach 2:
The common shield shell serves multiple functions simultaneously: it provides electromagnetic shielding for multiple terminal fittings, acts as a structural housing element, and integrates with the overall connector assembly, reducing the need for separate protective components
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 solution effectively prevents finger contact with the electrical connecting parts, enhances noise suppression, and maintains the secure connection of the terminal fittings, improving safety and reliability while allowing for easy detachment and reconnection.
Implementation Method 1
a contact prevention part that stops a finger to prevent the finger from coming into contact with the electrical connecting part through the terminal insertion port
Implementation Method 2
a plurality of terminal fittings are covered with one shield shell together with a housing, and electric wires for the respective terminal fittings are bundled and covered with one braid
Data Source
AI summary
A connector includes a second housing member having a terminal housing chamber that accommodates an electrical connecting part in an accommodation space, a terminal holding part that holds a held part of a terminal fitting so as to prevent the electrical connecting part from coming off the terminal housing chamber, a terminal insertion port through which a mating terminal is inserted into the terminal housing chamber, and a contact prevention part that stops fingers to prevent them from coming into contact with the electrical connecting part through the terminal insertion port. The contact prevention part is disposed to cover at least part of an end surface of the electrical connecting part disposed facing the terminal insertion port from the terminal insertion port side in the tube axial direction.