Cap Member Cranked Cable Fixing Soldering Defects
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Solution Overview
Problem
Conventional electrical apparatuses experience soldering defects in the core-wire soldered portion when force is applied to the lead wires, and the cap is not securely fixed to the casing, leading to potential disengagement.
Innovation Solution
The design includes a cap member with rotating shaft portions that securely engage with the casing, forming a cranked cable portion between the peripheral wall and cap member, which prevents pull-out forces and ensures the cap is firmly attached, using pressing structures and protrusions to maintain the cable's position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the opening portion is closed by a cap in conventional electrical apparatus, then the core-wire soldered portion is protected, but soldering defects occur when force is applied to lead wires
Solution Approach 1:
The cap is divided into a cap body and a separate shaft portion that rotates independently. The shaft portion engages with the casing to secure the cap, while the cap body covers the opening. This segmentation allows the cap to be firmly fixed without compromising soldering quality when force is applied to lead wires.
Solution Approach 2:
The shaft portion is designed to rotate relative to the cap body, transitioning between a locked state (when engaged with the casing) and an unlocked state. This dynamic mechanism allows the cap to be securely fixed during operation while enabling easy removal when maintenance is needed, preventing soldering defects without permanent fixation.
2Ease of operation
If the cap is designed to be easily removable, then maintenance is facilitated, but the cap may become unintentionally disengaged
Solution Approach 1:
The shaft portion is preliminarily configured to engage with the casing through a rotating locking mechanism. This preliminary engagement prevents unintentional disengagement during normal operation, while the rotational design allows intentional removal when needed for maintenance, balancing ease of operation with fixation stability.
Solution Approach 2:
The shaft portion acts as an intermediary between the cap body and the casing. It provides a controlled interface that allows the cap to be securely fixed through rotation while maintaining ease of removal. The shaft mediates between the need for stable fixation and the need for easy maintenance access.
3Reliability
If the cable is firmly fixed between the peripheral wall portion and cap member, then pull-out forces are prevented, but the cable may be damaged during installation
Solution Approach 1:
The cable is preliminarily routed through the opening portion before the cap is fully assembled. The shaft portion is then rotated to lock the cap in place, securing the cable between the peripheral wall portion and cap member. This preliminary routing allows the cable to be positioned correctly before final fixation, preventing damage during installation while ensuring strong fixation strength.
Data Source
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AI summary
A cable is sandwiched between a first inner wall surface of a peripheral-wall-side pressing wall portion and a first inner wall surface of a cap-side pressing wall portion, between a second inner wall surface of the peripheral-wall-side pressing wall portion and a second wall surface of the a cap-side pressing wall portion, and between a third inner wall surface of the peripheral-wall-side pressing wall portion and a third inner wall surface of the cap-side pressing wall portion to crank the cable to form a cranked portion of the cable. The peripheral-all-side pressing wall portion and the cap-side pressing wall portion sandwich the cranked portion therebetween. Thus, defective soldering may be prevented between a plurality of lead wires and a core-wire soldered portion to which core wires of the lead wires are soldered and connected.