Optical Fiber Terminal Box Sealing via Segmented Threading Block
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Solution Overview
Problem
Existing optical fiber terminal boxes fail to meet the IP65 dust sealing and water resistance requirements, allowing foreign matter and sprayed water to enter and cause damage.
Innovation Solution
The design incorporates a threading block with a multi-layer step structure and integrally formed rubber plug, featuring positioning grooves and lug bosses for interference and clearance fits, ensuring a tight seal and accommodating optical fiber cabling with a tapered hole that can be formed as needed, along with a hinged optical fiber storage tray for enhanced durability and hovering functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a threading plate with concentric stripping wires is used to improve universality of cable entry, then adaptability is improved, but sealing performance deteriorates and IP65 requirements cannot be met
Solution Approach 1:
The threading plate is divided into multiple independent threading holes, each capable of accommodating different cable types and sizes. Each threading hole is independently sealed with sealing rings, allowing the structure to adapt to various cable configurations while maintaining IP65 sealing performance through modular segmentation.
Solution Approach 2:
Sealing rings are introduced as intermediary elements between the threading holes and the box body to prevent water and dust ingress. These sealing rings act as mediators that enable universal cable entry while maintaining the required sealing performance, solving the contradiction between adaptability and reliability.
2Ease of manufacture
If the threading block structure is simplified for ease of manufacture, then ease of manufacture is improved, but positioning precision and sealing reliability deteriorate
Solution Approach 1:
The threading block is designed as an integrated component that combines multiple functions: cable entry, positioning, and sealing. The positioning grooves and lug bosses are merged into a single molded part, achieving both manufacturing simplicity through integral construction and positioning precision through built-in geometric features.
Solution Approach 2:
The design uses standardized positioning groove dimensions and lug boss configurations that can be directly molded, changing the manufacturing parameter from multi-step assembly to single-step molding. This maintains positioning precision while significantly improving ease of manufacture.
Data Source
AI summary
The invention discloses an optical fiber terminal box comprising a box body, where mounting grooves are disposed on the box body, a threading block is plugged into the mounting groove having an open end provided with a threading block pressing plate, the threading block is provided with an optical fiber cabling hole, an outer circumferential surface of the threading block is provided with at least two first positioning grooves arranged along an axial direction of the optical fiber cabling hole, at least one second positioning groove is disposed on a groove bottom surface of at least one of the first positioning grooves, an inner circumferential surface of the mounting groove is provided with first positioning lug bosses, the first positioning lug bosses and the first positioning grooves are arranged in one-to-one correspondence, and at least one of the first positioning lug bosses is provided with a second positioning lug boss.