Fastening Screw with Annular Grooves for Waterproof Sealing
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Solution Overview
Problem
Conventional connecting structures using fastening screws face challenges in maintaining waterproof performance, particularly when exposed to water, due to the need for additional parts like rubber O-rings, which increase costs and assembly time.
Innovation Solution
The implementation of fastening screws with a head and threaded portion, featuring multiple rows of annular grooves on the seat surface or neck, forming multiple-row airtight chambers to prevent water infiltration, thereby eliminating the need for additional sealing components and simplifying the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a rubber O-ring is installed to prevent water infiltration, then waterproof performance is improved, but the number of parts increases and assembly time increases
Solution Approach 1:
The sealing function is merged into the fastening screw itself by forming annular grooves directly on the screw body. This integration eliminates the need for separate rubber O-rings while maintaining waterproof performance, directly resolving the contradiction between reliability and device complexity
Solution Approach 2:
The fastening screw performs its own sealing function through the annular grooves formed on its surface. The screw structure itself provides the waterproofing capability without requiring external sealing components, reducing part count while maintaining effectiveness
2Reliability
If a rubber O-ring is installed to prevent water infiltration, then waterproof performance is improved, but assembly time increases
Solution Approach 1:
The sealing function is integrated into the fastening screw structure through annular grooves, eliminating the separate step of installing rubber O-rings. This reduces assembly time while maintaining waterproof performance
Solution Approach 2:
The annular grooves are pre-formed on the fastening screw during manufacturing, so no additional sealing components need to be installed during assembly. The waterproofing capability is already built-in, reducing assembly time and complexity
3Reliability
If multiple rows of annular grooves are formed on the fastening screw, then waterproof performance is improved through the labyrinth effect, but manufacturing complexity increases
Solution Approach 1:
The sealing structure is segmented into multiple rows of annular grooves on the fastening screw. This segmentation creates a labyrinth effect that enhances waterproof performance while the grooves themselves can be formed using standard machining processes, balancing manufacturing feasibility with improved sealing
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
This configuration effectively prevents water permeation through the labyrinth effect, reducing the number of parts and assembly time while maintaining waterproof performance, similar to traditional screws without the need for O-rings.
Implementation Method 1
a plurality of rows of annular grooves are formed in a seat surface of the head around a shaft of the screw
Data Source
AI summary
It is possible to compensate for waterproof with a simple structure, and to achieve a reduction in the number of parts and a reduction in the connecting operation time.There is a connecting member that connects a first member 100 to a second member 101, wherein the connecting member is a fastening screw 10, having a head 11 on one side thereof and having a threaded portion 12 on the other side thereof, which performs connecting by fastening, and a plurality of rows of annular grooves 13 are formed in a seat surface 11a of the head 11 around a shaft of the screw. In addition, the head side of the fastening screw 10 is provided with a neck having a larger diameter than the diameter of the threaded portion which is closely inserted into an insertion hole of the first member, and a plurality of rows of annular grooves 13 are formed on the outer circumference of the neck.