Lever Connector Backlash Prevention for Vibration Isolation
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Solution Overview
Problem
Conventional lever type connectors experience vibration propagation due to gaps between housings, leading to terminal abrasion and increased electric resistance when external forces are applied.
Innovation Solution
Incorporation of backlash preventing parts and stopper ribs that project towards the inner wall surfaces of the hood part, ensuring pressure contact and filling the gap for the lever's swing motion, thereby preventing vibration propagation and terminal abrasion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a gap is provided between the hood part and the second housing to allow lever swing motion, then the lever can be accommodated in the hood part, but vibration is propagated between the housings causing terminal abrasion and increased electric resistance
Solution Approach 1:
A vibration prevention member is introduced as an intermediary element between the first housing and the second housing. This member fills the gap formed by the lever's swing motion and prevents vibration propagation, thereby eliminating terminal abrasion and maintaining electrical connectivity without interfering with the lever's operational swing motion.
2Force
If the lever is swingably assembled to the second housing to allow fitting into the hood part, then the second housing can be fitted in the hood part with reduced fitting force, but a gap is created that allows vibration propagation
Solution Approach 1:
The vibration prevention member serves as a mediator that fills the gap created by the lever mechanism. It prevents vibration from propagating through the gap between housings, thereby preventing terminal abrasion and maintaining reliable electrical connectivity while preserving the low fitting force advantage of the lever mechanism.
3Reliability
If the gap between housings is filled to prevent vibration propagation, then terminal abrasion is prevented, but the lever swing motion is restricted
Solution Approach 1:
The vibration prevention member is designed with specific local properties: it fills the gap sufficiently to prevent vibration propagation and terminal abrasion, while its dimensions and positioning are controlled to allow the lever's necessary swing motion. This localized intervention maintains electrical connectivity without restricting operational freedom.
Data Source
AI summary
A lever type connector includes a first housing having a hood part, a second housing fittable into the hood part, a lever swingably assembled to an outer circumference of the second housing in a manner that a swing motion of the lever allows the second housing to be fitted in the hood part and allows the lever to be accommodated in the hood part, and a backlash preventing part provided in the lever and formed so as to project toward an inner wall surface of the hood part. The backlash preventing part is in pressure contact with the inner wall surface of the hood part when the second housing is fitted into the hood part.