Waterproof Connector Rotation Stopping Rib Design
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Solution Overview
Problem
Existing waterproof connectors lack effective control over the mounting orientation and position of the rubber ring, leading to potential detachment of rotation stopping ribs from locking grooves, which compromises the rubber ring's rotational stopping functionality.
Innovation Solution
The design incorporates an annular rubber ring with trapezoidal and rectangular ribs that engage with a housing's accommodation groove, featuring a bottom surface and facing surfaces that press the ribs to the bottom surface, preventing detachment and ensuring continuous rotation stopping without design changes to existing components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rectangular locking groove is used to accommodate the rotation stopping rib, then the structure is simple to manufacture, but the rib may be lifted up from the bottom surface and fail to stop rotation
Solution Approach 1:
The locking groove is designed with an asymmetric trapezoidal cross-section where the engaged surfaces are inclined relative to the bottom surface. This asymmetric geometry creates a mechanical interlock that prevents the rotation stopping rib from being lifted up, while maintaining manufacturing simplicity through standard molding techniques.
Solution Approach 2:
The locking groove geometry is changed from a simple rectangular shape to a trapezoidal shape with specific angle parameters. The engaged surfaces are inclined at specific angles to create pressing force on the rotation stopping rib, transforming the groove from a passive容纳 space to an active constraint structure that prevents lifting while stopping rotation.
2Object-affected harmful factors
If the rubber ring is mounted on the outer peripheral surface of the fitting portion, then it provides waterproofing function, but there is no control on mounting orientation and position
Solution Approach 1:
The rotation stopping ribs are pre-formed on the rubber ring during manufacturing, and the locking grooves are pre-formed on the housing. When assembled, these pre-formed features automatically guide the rubber ring to the correct orientation and position, eliminating the need for separate orientation control steps and ensuring precise mounting.
Solution Approach 2:
The mechanical orientation control system replaces simple snap-fit mounting with a guided engagement system. The rotation stopping ribs engage with the locking grooves through a mechanical interlocking mechanism that automatically establishes the correct mounting orientation, substituting for complex alignment procedures or additional positioning components.
Data Source
AI summary
A waterproof connector (10) includes an annular rubber ring (30) and a housing (20) on which the rubber ring (30) is to be mounted. A trapezoidal rotation stopping rib (34 having two engaging surfaces is provided on a side edge of the rubber ring (30), whereas an accommodation groove (26) into which the rotation stopping rib is to be accommodated is provided in the housing (20). The accommodation groove (26) has a bottom surface (21A). Two facing engaged surfaces (42) are on both sides of the bottom surface (21A) and are configured to press the rotation stopping rib to the bottom surface (21A) by being engaged with the engaging surfaces of the rotation stopping rib.