Rubber Plug Mounting Tongue Hooking Strength
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Solution Overview
Problem
Existing connectors with voltage detection openings face challenges in ensuring the safety of terminal fittings by maintaining a charged state, as the large diameter portion of the sealing plug needs to be increased to enhance resistance force, but this compromises the ease of attachment due to increased compression requirements.
Innovation Solution
A cover unit with a rubber plug and holder design, where the mounting tongue is thicker than the coupling, allowing for enhanced hooking strength while the coupling can be easily deformed for easy attachment, and a center hole for resilient deformation facilitates easy insertion and secure attachment to the device.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If the large diameter portion of the sealing plug is increased in size to enhance resistance force against pull, then the hooking strength is improved, but the ease of attachment deteriorates due to increased compression requirements
Solution Approach 1:
The sealing plug is divided into two distinct parts: a large diameter portion for hooking and a small diameter portion for insertion. This segmentation allows each part to be optimized independently - the large diameter portion provides sufficient hooking strength while the small diameter portion ensures easy insertion without requiring excessive compression.
Solution Approach 2:
Different portions of the sealing plug have different diameters tailored to their specific functions. The large diameter portion is localized at the hooking area to provide strength, while the small diameter portion is localized at the insertion area to facilitate easy attachment. This local quality differentiation resolves the contradiction between strength and ease of operation.
2Reliability
If the large diameter portion is increased to enhance resistance force, then the reliability of the connection is improved, but the device complexity increases due to additional compression requirements
Solution Approach 1:
By segmenting the sealing plug into large and small diameter portions, the design achieves reliable connection through the large diameter hooking portion while keeping the attachment process simple through the small diameter insertion portion, avoiding the need for complex compression mechanisms.
Solution Approach 2:
Instead of making the entire sealing plug large diameter to ensure reliability, the invention inverts the approach by making only the critical hooking portion large diameter while keeping the insertion portion small, thereby maintaining reliability without increasing overall complexity.
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
Ensures the attachability of the rubber plug while maintaining sufficient hooking strength, ensuring the rubber plug is securely fixed to the device and enhancing the rigidity of the rubber plug body for stable attachment.
Implementation Method 1
the coupling of the rubber plug is thinner than the mounting tongue. Accordingly, the coupling can be deformed resiliently with ease. Thus, the coupling can be bent easily when inserting the mounting tongue into the insertion hole of the rubber plug holder
Implementation Method 2
the mounting tongue of the rubber plug is thicker than the coupling. Thus, the hooking strength to the hook is enhanced by making the mounting tongue of the rubber plug thicker than the coupling. Thus, the hooking strength of the rubber plug to the hook can be ensured. On the other hand, the coupling of the rubber plug is thinner than the mounting tongue. Accordingly, the coupling can be deformed resiliently with ease.
Data Source
AI summary
A cover unit (50) includes a plug holder (60) mounted on a cover (51). A rubber plug (80) is attached to the plug holder (60) and closes an opening (30) of a device (C). The rubber plug (80) includes a cylindrical body (81) to fit in the opening (30). A mounting tongue (87) extending from a base of the body (81) via a coupling (85) and has a locking hole (89). The plug holder (60) includes an insertion hole (75) allowing the mounting tongue (87) of the rubber plug (80) to be inserted on a side opposite to the plug body (81). A hook (67) engages the locking hole (89) of the mounting tongue (87) inserted into the insertion hole (75). The mounting tongue (87) of the rubber plug (80) is thicker than the coupling (85).