Tripod Leg Lock Structure for Waterproof Sealing in Harsh Conditions

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Solution Overview

Problem

Existing tripods face issues with waterproofing and durability in hostile environments due to the abrasion and corrosion of rubber seals in their locking mechanisms, leading to poor sealing performance and increased fouling in dirty and salty conditions.

Innovation Solution

The design incorporates a locking mechanism with a collet ramp and knob substrate featuring O-rings and a collet lock with a circular ring or v-shaped ring blocking member, which provides a waterproof seal and minimizes contamination, using a combination of O-rings and anti-twist sleeves to maintain the integrity of the seal even in harsh conditions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If rubber seals are used in the locking mechanism, then waterproofing is achieved, but the rubber seals are prone to abrasion and corrosion in hostile environments

Engineering Contradiction:

ImprovewaterproofingVSAvoidservice life of rubber seals

Core Design Contradiction:

ReliabilityVSDuration of action of stationary object

Solution Approach 1:

The patent removes the rubber seal from the locking mechanism entirely, replacing it with a sealless design that uses the interference fit between the collet lock and leg tube to provide both locking and sealing functions, thereby eliminating the durability issues of rubber seals while maintaining waterproofing

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The collet lock structure performs multiple functions simultaneously: it provides the locking mechanism to secure the leg tube in position and creates an interference fit that serves as the waterproof seal, eliminating the need for separate rubber sealing components

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Ease of operation

If the locking mechanism is exposed to the environment, then ease of operation is improved, but fouling and corrosion increase

Engineering Contradiction:

Improveaccessibility of locking mechanismVSAvoidfouling and corrosion

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The locking mechanism is nested within the telescopic tube structure, with the collet lock positioned inside the leg tube assembly. This nested configuration protects the locking components from direct environmental exposure while maintaining operational accessibility

Inventive Principle:

Principle #7Nested doll (Nesting)

Solution Approach 2:

The interference fit between the collet lock and leg tube acts as an intermediary barrier that prevents direct contact between environmental contaminants and the locking mechanism components, reducing fouling and corrosion

Inventive Principle:

Principle #24Intermediary (Mediator)

3Reliability

If rubber seals are used for waterproofing, then sealing performance is achieved, but the seals can be peeled off and lose waterproof performance

Engineering Contradiction:

Improvesealing performanceVSAvoidattachment integrity of rubber seals

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent eliminates the rubber seal component entirely, replacing it with a mechanical interference fit between the collet lock and leg tube that provides sealing through direct metal-to-metal contact, removing the risk of seal detachment

Inventive Principle:

Principle #2Taking out (Extraction)

Solution Approach 2:

The design employs a composite sealing approach combining the interference fit mechanism with the structural integrity of the telescopic tube assembly, creating a robust seal that maintains attachment integrity under various operational conditions

Inventive Principle:

Principle #40Composite materials

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

The solution effectively maintains a waterproof seal and reduces contamination, preventing fouling and corrosion, thus enhancing the tripod's performance and longevity in hostile environments.

Implementation Method 1

featuring O-rings and a collet lock with a circular ring or v-shaped ring blocking member, which provides a waterproof seal and minimizes contamination

Methodology Applied

Scientific EffectSealing: