Locking Pivot Rider Assembly for Sliding-Pivot Panel Control
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Solution Overview
Problem
There is a need for improved sliding and pivot fenestration units and components that enhance the functionality and versatility of sliding doors and windows, particularly in terms of locking mechanisms and height adjustment.
Innovation Solution
The fenestration units incorporate a locking pivot wheel assembly with a rider, pivot, and lock system that allows for slide and pivot mode operations, featuring a lock that inhibits sliding motion during pivot mode and releases for sliding when transitioning back, along with height-adjustable components for panel positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking mechanism is added to the pivot wheel assembly to inhibit sliding during pivot mode, then the reliability of operational mode separation is improved, but the device complexity increases
Solution Approach 1:
The lock mechanism is integrated into the pivot wheel assembly, combining the locking function with the existing pivot and rider components. The lock pin, actuator, and biasing member work together as a unified subsystem within the rider assembly, eliminating the need for separate locking components and reducing overall system complexity while ensuring reliable mode separation.
Solution Approach 2:
The lock mechanism operates automatically through the actuator that is driven by the rotation of the pivot itself. As the pivot rotates from slide mode to pivot mode, the actuator is automatically actuated to engage the lock pin, and vice versa. This self-actuating mechanism eliminates the need for external control systems or additional actuators, simplifying the device while maintaining reliable operational mode separation.
2Ease of operation
If a cam-based actuator is used to move lock pins during pivot rotation, then the ease of operation is improved, but the manufacturing precision requirements increase
Solution Approach 1:
The cam is designed to translate the rotational motion of the pivot into the linear reciprocating motion of the lock pins dynamically. The cam profile is shaped to provide the necessary force and motion characteristics during the transition between slide and pivot modes. By optimizing the cam geometry, the system achieves smooth lock pin actuation that is synchronized with pivot rotation, making operation easy while managing manufacturing tolerances through proven cam design methodologies.
3Adaptability or versatility
If height-adjustable mounts are incorporated into the rider assembly, then the adaptability of the fenestration unit is improved, but the device complexity increases
Solution Approach 1:
The height-adjustable mounts serve multiple functions: they provide vertical adjustment of the panel, accommodate variations in installation heights, and maintain proper alignment of the rider with the track. The adjustable mount mechanism is integrated into the rider assembly, allowing a single component to perform both the structural support function and the height adjustment function, thereby reducing overall system complexity while enhancing adaptability.
Data Source
AI summary
A sliding and pivoting fenestration unit, such as a sliding door, with screen. Embodiments of the fenestration unit include a locking and height-adjustable pivot rider, a head slide, a screen carrier, and a method of operation.