Telescopic CPA Device Enhances Connector Leverage
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Solution Overview
Problem
Existing connectors lack assurance mechanisms to prevent incomplete mating and inadvertent unlocking, particularly in miniaturized designs where reliability and noise reduction are critical.
Innovation Solution
A connector with a telescopic CPA device that extends the lever arm in its initial position, enhancing leverage and ease of use, and retracts to a compact form in the final position, ensuring secure mating and noise reduction through complementary shapes and locking arms, preventing unintended pivoting and vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the connector is miniaturized to reduce size, then the connector dimensions are reduced, but the leverage effect of the latch arm is reduced making it difficult to manipulate
Solution Approach 1:
The CPA device is designed to be movable between a retracted position (when not engaged) and an extended position (when engaged with the latch arm). This dynamic configuration allows the lever arm length to change based on engagement state, providing enhanced leverage only when needed while maintaining compact size when disengaged.
Solution Approach 2:
The CPA device can be nested within or integrated into the connector housing when not in use, and extends outward when engagement is required. This nesting approach allows the connector to maintain a compact form factor while providing an extended lever arm for easy latch manipulation when needed.
2Ease of operation
If the CPA device is extended to increase leverage effect, then the ease of operation is improved, but the connector size increases
Solution Approach 1:
The CPA device transitions between extended and retracted states based on operational needs. When the latch arm needs to be actuated, the CPA extends to provide a longer lever arm for easier manipulation. When not in use, it retracts to minimize the overall connector footprint.
Solution Approach 2:
The extended lever arm feature is localized only to the CPA device portion that interacts with the latch arm, rather than increasing the size of the entire connector. The housing and other components remain compact, with the extended functionality confined to the specific area where it is needed.
3Volume of moving object
If the CPA device is made telescopic to reduce size, then the connector size is reduced, but the structural complexity increases
Solution Approach 1:
The CPA device combines multiple functions into a single integrated component: it serves as both the position indicator and the lever arm extension for latch manipulation. The telescopic mechanism is integrated into the CPA housing rather than being a separate assembly, reducing the number of parts while providing the needed functionality.
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 ensures reliable and secure mating, reduces connector size, and minimizes noise and vibrations by enhancing the leverage effect and using complementary shapes to lock the CPA device in place, ensuring that connectors remain securely mated until intentionally unlocked.
Implementation Method 1
the CPA device extends in cantilevered position and increases the leverage effect of the lever portion. In other words, the CPA makes the lever arm of the lever portion longer in the initial position of the CPA
Implementation Method 2
the latch arm having a free end which is blocked by the CPA device, in its final position, the CPA device being itself blocked by a static portion of the housing. This way, the latch arm can no longer be pivoted
Implementation Method 3
The lever portion has a pressing area. When a force is exerted on this pressing area, a leverage effect (i.e. lever arm effect) operates on the latch arm. This makes the tooth free
Data Source
Figure 1~3C
Figure 4~5C
Figure 6A~8
AI summary
A connector with housing and a latch arm integrally molded with the housing. The latch arm has a lever portion (146) and a latch portion which can be actuated by leverage effect when the lever portion (146) is operated. The connector further includes a connector position assurance (CPA) device slidingly mounted on the housing between an initial position in which the latch portion can be actuated when the lever portion (146) is operated and a final position in which it prevents the actuation of the latch portion. The CPA device has a pushing portion, extending in cantilevered position when the CPA is its initial position so as to increase the leverage effect of the lever portion (146).