Hydraulic Control Handle for Power-Free Tripod Leg Locking

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Solution Overview

Problem

Photography support stand control handles prone to power issues when used outdoors, necessitating additional chargers or power banks, increasing user burden and inconvenience.

Innovation Solution

A hydraulic control handle with a hydraulic cylinder and piston system that locks or unlocks support legs without the need for charging, using hydraulic fluid to operate the support leg locking assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If an electronic control handle is used to lock or unlock the support leg, then the control function is achieved, but the control handle runs out of power when used outdoors for long time, requiring additional chargers or power banks

Engineering Contradiction:
Improvecontrol handle operationVSAvoidpower consumption
Core Design Contradiction:
Ease of operationVSUse of energy by moving object

Solution Approach 1:

The patent replaces the electronic control system with a pure mechanical control system. The control handle uses a lever mechanism that directly transmits mechanical force through a transmission component to the support leg locking assembly, eliminating the need for electronic components, batteries, and external power sources while maintaining full control functionality

Inventive Principle:
Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces a hydraulic system consisting of a hydraulic cylinder, hydraulic piston, and hydraulic fluid to transmit force from the control handle to the support leg locking assembly. When the lever is operated, it drives the hydraulic piston to move hydraulic fluid into the hydraulic cylinder, generating mechanical force to lock or unlock the support leg without requiring electrical power

Inventive Principle:
Principle #29Pneumatics and hydraulics

2Reliability

If additional chargers or power banks are carried to ensure continuous operation of the electronic control handle, then the power supply issue is resolved, but the burden of carrying additional equipment increases

Engineering Contradiction:
Improvecontinuous operationVSAvoidcarrying burden
Core Design Contradiction:
ReliabilityVSWeight of moving object

Solution Approach 1:

The patent extracts and removes all electronic components, power sources, and associated accessories from the control system. By eliminating the electronic control handle entirely and replacing it with a mechanical-hydraulic system, the need for carrying chargers or power banks is completely removed, reducing the carrying burden while ensuring continuous operation

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The mechanical-hydraulic control system is self-contained and self-powered, using the user's manual operation of the lever to directly drive the hydraulic mechanism. The system requires no external power sources, batteries, or maintenance of electronic components, making it inherently reliable for continuous outdoor operation without additional equipment

Inventive Principle:
Principle #25Self-service

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

Eliminates the need for external power sources, reducing user burden and enhancing convenience by providing a reliable and power-independent operation for photography support stands.

Implementation Method 1

a hydraulic cylinder arranged in the handle housing, the hydraulic cylinder comprising a cylinder body and a first piston, the cylinder body being defined with a hydraulic chamber for storing hydraulic fluid

Methodology Applied
Scientific EffectHydraulic pressure transmission: Pascal's Law

Data Source

PatentUS20260110313A1Control handle of photography support stand and photography support stand
Publication Date: 2026.04.23 SHENZHEN LEQI INNOVATION CO LTD
  • US20260110313A1 patent drawing
  • US20260110313A1 patent drawing
  • US20260110313A1 patent drawing

AI summary

A control handle of a photography support stand and a photography support stand are provided. The control handle is configured to unlock or lock a support leg locking assembly of the photography support stand, and includes a handle housing and a hydraulic cylinder arranged in the handle housing. The hydraulic cylinder includes a cylinder body and a first piston. The cylinder body is defined with a hydraulic chamber for storing hydraulic fluid and a through hole that is communicated with the hydraulic chamber and configured to allow the hydraulic fluid to enter and exit the hydraulic chamber. The through hole is communicated with the support leg locking assembly. The first piston is slidably arranged in the hydraulic chamber and configured to expel the hydraulic fluid in the hydraulic chamber through the through hole or draw the hydraulic fluid back into the hydraulic chamber through the through hole.