Window Handle with Adjustable Driver and Spring
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Solution Overview
Problem
Existing operating handles for windows and doors require complex and costly manufacturing due to the need for multiple components and variable-length drivers, making them difficult to assemble and handle.
Innovation Solution
A rotatable handle with a longitudinally displaceable driver and a compression spring, along with stop elements, allows for adjustable length without needing multiple driver sizes, simplifying production and assembly by allowing the driver to automatically adapt to different installation situations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If variable-length drivers are made using spring-mounted and guided bushings, then the driver length can be adjusted, but the device complexity increases and manufacturing cost rises
Solution Approach 1:
The driver is merged with a compression spring into a single integrated component. The spring serves dual functions: providing the pushing force to extend the driver and enabling length adjustment. This eliminates the need for separate bushings and guidance mechanisms, reducing the number of parts while maintaining variable length capability.
Solution Approach 2:
The compression spring performs multiple functions simultaneously: it acts as both the actuating mechanism to push the driver outward and the length-adjustment mechanism. The stop elements provide both positioning and limiting functions. This multi-functionality reduces device complexity while achieving adaptability.
2Adaptability or versatility
If multiple drivers of different lengths are provided, then different installation situations can be accommodated, but the quantity of parts increases and assembly becomes more difficult
Solution Approach 1:
The driver is designed as a dynamic component that can change its effective length during installation and use. The compression spring enables the driver to extend to different lengths as needed, replacing the need for multiple static drivers of fixed lengths. This dynamic adjustment capability reduces the quantity of parts required.
3Ease of manufacture
If the driver is made fixed in length, then the structure is simple, but it cannot adapt to different installation situations
Solution Approach 1:
The driver's length parameter is made variable through the compression spring mechanism. The spring allows the driver to change its extended length within a range, enabling adaptation to different installation situations while maintaining a relatively simple overall structure. Stop elements define the maximum extension to maintain structural integrity.
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 enables quick installation with reduced part variety, ensuring torque transmission while preventing unintended driver release, thus enhancing manufacturing simplicity and usability.
Implementation Method 1
a compression spring (20) is arranged in the recess and exerts a compressive force directed from the recess on the driver (16)
Data Source
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AI summary
An operating handle for a window or door is proposed, comprising a handle which is rotatably mounted with a handle neck about a pivot axis of a stop body and has an elongated driver for entering into an operative connection with an operating element of the window or door, which can be coupled to the handle in a rotationally fixed manner, wherein the handle neck can be connected to a bushing for fixing the handle to the stop body.According to the invention, the actuating handle has a recess; the driver can be inserted longitudinally displaceably into the recess; a compression spring is arranged in the recess and exerts a compressive force directed out of the recess on the driver; and the driver has at least one first stop element that corresponds to at least one second stop element in or on the recess, so that a movement of the driver directed out of the recess is limited by the stop elements.