Tripod Shaft Blocking Mechanism for Torsional Stability
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing tripod support devices for photography equipment lack sufficient torsional stability due to play between shafts, runners, and housings, which is not adequately addressed by current blocking mechanisms.
Innovation Solution
A blocking device for shafts featuring a housing with a sliding actuator and runner mechanism that secures the shaft in a blocking position by applying radial pressure, utilizing inclined surfaces and multiple sliding axes to enhance rigidity and stability, allowing for high levels of torsional resistance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a blocking device with a runner sliding inside a housing is used to block shafts, then the shaft can be blocked in a desired position, but play remains between the shaft, runner and housing, resulting in insufficient torsional stability
Solution Approach 1:
The blocking device is segmented into distinct functional components: a shaft, a runner with blocking elements, and a housing with seats. This segmentation allows each component to be optimized for its specific function while working together to eliminate play. The runner is divided into multiple blocking elements that can engage with corresponding features on the shaft, creating multiple contact points that reduce movement and play between components.
2Reliability
If shaft thickness is increased or high-modulus materials like carbon fiber composites are used to increase rigidity, then torsional stability improves, but device complexity and cost increase
Solution Approach 1:
The runner acts as an intermediary component between the shaft and the housing. It features blocking elements that engage with the shaft and corresponding seats in the housing, creating a mechanical linkage that eliminates play without requiring changes to the shaft's fundamental structure or material composition. This intermediary mechanism provides torsional stability while keeping the shaft design simple and compatible with conventional materials.
3Reliability
If parallel legs are secured to each other to reduce movements, then torsional stability improves, but device complexity increases
Solution Approach 1:
The blocking device extracts and addresses the source of instability at the shaft level, rather than requiring complex leg configurations. By eliminating play between the shaft, runner, and housing components, the invention stabilizes each individual leg independently, removing the need for additional parallel leg structures or cross-bracing mechanisms to achieve torsional stability.
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 significantly reduces or eliminates play between components, providing enhanced rigidity and stability against torsional forces, resulting in improved performance and reduced undesirable movements during photography.
Implementation Method 1
it urges the at least one runner both against the shaft and against the housing so as to block the actuator, the at least one runner and the shaft with respect to the housing
Implementation Method 2
an actuator which is received in a second seat which is formed in the housing and which can be moved along a second sliding axis away from and towards a blocking position of the shaft
Data Source
AI summary
A blocking device for shafts includes a housing having a first seat for receiving a shaft movable along a first sliding axis, an actuator received in a second seat formed in the housing and movable along a second sliding axis away from and towards a blocking position of the shaft, and at least one runner which is received in the housing and which is interposed between the actuator and the shaft. The actuator is formed such that, when it is moved towards the blocking position, it urges the one runner both against the shaft and against the housing so as to block the actuator, the runner and the shaft with respect to the housing.