Latching Motion Transfer Mechanism for Caster Lift Synchronization
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Solution Overview
Problem
Existing motion transfer mechanisms for articulating beds and similar applications lack efficient mechanisms to lift and latch wheels or casters off a support surface, requiring complex and unreliable systems for engagement and disengagement.
Innovation Solution
A latching motion transfer mechanism that lifts and latches by applying force in one direction initially and releases by applying force in the same direction again, utilizing a detent member and biasing member to engage and disengage catches, with synchronization features to maintain mechanical linkage between multiple mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex motion transfer mechanism is used to lift and latch casters, then the lifting function can be achieved, but the system becomes unreliable and difficult to operate
Solution Approach 1:
The mechanism is divided into distinct functional components: a drive member that receives input force, a detent member that provides latching action, and a biasing member that maintains default position. This segmentation allows each component to perform its specific function reliably while keeping the overall structure manageable and easy to understand.
Solution Approach 2:
The biasing member automatically returns the detent member to its default position after latching, without requiring additional actuators or complex control systems. The spring-loaded detent member self-actuates to engage or disengage from catches based on the drive member's position, eliminating the need for separate return mechanisms.
2Device complexity
If a simple motion transfer mechanism is used, then the device complexity is reduced, but the ability to reliably lift and latch casters is compromised
Solution Approach 1:
The biasing member is pre-loaded to automatically position the detent member in its default state, ensuring that the mechanism is always ready to latch when the drive member is in the correct position. This preliminary positioning action eliminates the need for complex control systems to maintain readiness.
Solution Approach 2:
The detent member acts as an intermediary between the drive member and the catches, translating the drive member's linear motion into reliable latching action. This intermediate component provides mechanical advantage and ensures positive engagement with the catches, enhancing reliability without adding significant complexity.
3Adaptability or versatility
If multiple latching mechanisms are used independently, then each can operate autonomously, but synchronization between mechanisms becomes difficult to maintain
Solution Approach 1:
Multiple latching mechanisms are connected through a common drive member or linkage system, merging their operation into a unified mechanism. This allows all latches to be actuated simultaneously by a single input force, maintaining synchronization automatically while preserving the ability of each individual latch to engage or disengage independently based on its own detent member's position.
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
Enables reliable and efficient lifting and lowering of wheels or casters, ensuring stable operation and synchronization across multiple mechanisms, enhancing the stability and mobility of supported structures.
Implementation Method 1
a biasing member disposed between the drive member and the detent member and configured to urge the detent member toward the first catch
Data Source
AI summary
Latching motion transfer arrangements may be used to raise an object up and out of the engagement with the ground or other support surface and to lower the object back onto the ground or other support surface. In one exemplary embodiment, the mechanism is caused to lift and latch by applying force in a first direction, a first time, and is caused to release and lower by applying force in the first direction, a second time.