Retractable Window Handle Mechanism for Ergonomic Operation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional window and door fittings with protruding rotary handles are aesthetically unappealing and can hinder the sliding motion of adjacent doors, while also being less ergonomic for operation.
Innovation Solution
A fitting with a retractable handle that can be extended by pressing an activation section, allowing for easy grasping and unlocking, featuring a gear mechanism to convert linear motion into rotary motion for locking and unlocking, and a spring-loaded mechanism for automatic locking and simplified operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a protruding rotary handle is used for locking and unlocking, then the handle is easily graspable and operable, but the visual appearance is impaired and it may hinder sliding motion of adjacent doors
Solution Approach 1:
The handle is designed to be dynamically repositionable between a retracted state (flush with the wing surface for aesthetic appearance) and an extended state (protruding for easy grasping and operation). This dynamic transformation allows the handle to adapt its position based on operational needs versus aesthetic requirements.
Solution Approach 2:
The handle operates in a different dimensional space by extending perpendicular to the wing surface rather than protruding radially outward. This linear extension in a different dimension allows the handle to be retracted completely into the wing surface while still providing adequate graspable surface area when extended.
2Ease of operation
If the handle is spaced clearly from the wing surface for good accessibility, then operability is improved, but visual appearance is impaired
Solution Approach 1:
The handle transitions from a static protruding position to a dynamic position that can be retracted flush with the wing surface. This dynamic capability allows the handle to maintain adequate spacing for accessibility during operation while achieving a clean, integrated appearance when retracted.
3Ease of operation
If a rotary handle is used for locking and unlocking, then the drive section can be directly actuated, but linear movement can be brought about with less effort and is more ergonomic
Solution Approach 1:
A gear mechanism serves as an intermediary between the linearly movable handle and the rotatable drive section. The gear converts the linear displacement of the handle into rotational motion of the drive section, enabling ergonomic linear pulling motion while maintaining the rotational locking mechanism's effectiveness.
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 provides an inconspicuous, ergonomic, and intuitive operation that minimizes visual impact and facilitates easy opening and closing of windows and doors, ensuring good accessibility and aesthetics.
Implementation Method 1
the drive section for locking and unlocking the wing can be rotated about an axis of rotation, a gear being provided by means of which a linear displacement movement of the handle can be converted into a rotary movement of the drive section
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A fitting for opening and closing a window or door sash comprises a movable drive unit for locking and unlocking the sash and a handle for operating the drive unit. The handle can be moved from a retracted position to an extended position by pressing an activation element. The drive unit can be moved into an unlocked position by pulling the extended handle.