Handle Actuator Assembly for Dropdown Door Latch Release
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Solution Overview
Problem
Latching mechanisms for dropdown doors in animal transport vehicles are complex and difficult to operate, especially when the door is positioned overhead, making it hard for users to comfortably release the latch and control the door.
Innovation Solution
A handle actuator assembly with a uniquely shaped handle that functions as both a pivot and an actuator, featuring a medial portion for grasping, an upper pivot connector, and a lower actuator rod, allowing the door to be shifted from a closed to an open position with a single, comfortable motion by pulling the handle outward, thereby unlocking the latch and pivoting the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional latch mechanism is used for overhead dropdown doors, then the door can be retained in the closed position, but the mechanism becomes complex and difficult to operate
Solution Approach 1:
The patent combines the handle and actuator rod into a single integrated component. The handle serves dual purposes: as a gripping element for user operation and as the actuator rod that directly engages the latch mechanism. This merging eliminates the need for separate actuating components, reducing overall mechanism complexity while maintaining reliable door retention.
Solution Approach 2:
The handle is designed to perform multiple functions: it serves as both the user interface for operation and the mechanical actuator for the latch. By making the handle multi-functional, the patent reduces the number of separate components needed, simplifying the overall mechanism while ensuring reliable door retention through the integrated design.
2Reliability
If the door is positioned at an overhead location, then the door can be closed properly, but it becomes difficult for the user to comfortably release the latch and control the door
Solution Approach 1:
The patent introduces a pivoting motion dimension to the handle operation. The handle can pivot about a pivot axis in a vertical plane, allowing the user to apply force in a more ergonomic direction rather than requiring direct upward or downward force at the overhead location. This dimensional change in motion makes the operation more comfortable while maintaining reliable door closure.
Solution Approach 2:
The handle is designed with dynamic movement capabilities, including pivoting about a pivot axis and reciprocating motion of the actuator rod. This dynamic design allows the mechanism to adapt to user input forces and provides controlled motion during latch release and door operation, improving ease of operation while maintaining reliable closure.
3Ease of operation
If the handle is designed with multiple components for pivoting and actuating, then the functionality is improved, but the construction becomes more complicated
Solution Approach 1:
The patent merges the handle and actuator rod into a single integrated component, eliminating the need for separate connecting elements between these parts. This integration maintains the pivoting and reciprocating functionality needed for easy operation while reducing the number of separate components and assembly steps, thereby simplifying the overall construction.
Solution Approach 2:
The integrated handle assembly is designed to perform multiple functions within a single component structure. The handle serves as both the user interface and the actuating mechanism, while the pivot connectors and sleeves are incorporated into the same assembly. This multi-functionality approach provides comprehensive door operation control without requiring separate dedicated components for each function.
Data Source
AI summary
A handle actuator for dropdown doors or closures includes a handle with a pivot connector at the top and an actuator rod at the bottom. Upper and lower housings are mounted on the door in a vertically aligned and spaced apart relationship. The upper housing has a pivot connector connected with the pivot connector on the handle, and the lower housing has a sleeve slidably receiving the actuator rod therein for reception. A pivoting actuator arm has opposite ends connected with the actuator rod and the door proximate the handle housing, respectively, such that reciprocation of the actuator rod rotates the actuator arm. A connector has one end connected with the door latch, and the opposite end connected with the actuator arm, such that the door is shifted from the raised closed position to the lowered open position by grasping the handle, pulling the handle outwardly to release the door latch and manually pivoting the door about the bottom hinge to the lowered open position.