Conductor Connection Spring Retention in Tensioned Clamp Housings
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Solution Overview
Problem
Existing connection devices for conductor ends lack a secure mechanism to prevent the clamping spring from falling out of the housing, especially when the spring is in a tensioned state.
Innovation Solution
A connection device with a housing that includes a clamping spring retaining mechanism integrated into the housing, which secures the clamping spring against falling out by using a wall section directly connected to the front wall or a latch hook extending from the rear wall, ensuring the spring remains in place even when the clamping leg is tensioned.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the clamping spring is made movable to enable conductor insertion and clamping, then the connection device can perform its clamping function, but the clamping spring may fall out of the housing especially when tensioned
Solution Approach 1:
The receiving chamber is segmented into a insertion region and a retention region by the transverse wall section. This segmentation allows the clamping spring to be inserted through the opening while the wall section prevents it from falling out when tensioned, resolving the contradiction between movability for operation and retention for reliability.
Solution Approach 2:
The transverse wall section acts as an intermediary element between the clamping spring and the housing opening. It provides a retaining surface that prevents the spring from falling out while allowing the spring to remain movable for its clamping function, thus resolving the contradiction between ease of operation and reliability.
2Reliability
If a clamping spring retaining mechanism is added to prevent the spring from falling out, then the reliability of spring retention is improved, but the device complexity increases
Solution Approach 1:
The retaining mechanism is merged with the housing structure itself. The transverse wall section is formed as an integral part of the housing, combining the retaining function with the existing housing structure rather than adding a separate mechanism, thus improving reliability while minimizing increases in device complexity.
Solution Approach 2:
The transverse wall section serves multiple functions: it forms part of the housing structure, creates the retention barrier for the clamping spring, and defines the receiving chamber geometry. This multi-functionality improves spring retention reliability without proportionally increasing device complexity.
Data Source
AI summary
A connection device for connecting a conductor end includes a housing with a rear wall and a front wall, a busbar arranged in the housing and a V-shaped clamping spring arranged in the housing. The clamping spring has a supporting leg supported on an abutment, a clamping leg and a spring rear connecting the two legs. A conductor insertion channel is configured in the housing, by which a conductor end to be connected can be guided into a contacting space between the front wall and the rear wall. The housing further has a receiving chamber open toward the front wall of the housing for inserting and receiving the clamping spring. A housing attachment overlapped by the clamping spring is configured in the receiving chamber and the clamping spring is at least positively secured toward the front wall against falling out of the receiving chamber by a clamping spring retaining mechanism integrated into the housing, including in a state in which the clamping leg has been moved into an open position.