Handle Assembly Asymmetry for Narrow Window Frames
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Solution Overview
Problem
Existing handle arrangements for narrow frame profiles and outward-opening windows are unsuitable, as they lack sufficient space for installation, compromising both aesthetics and functionality due to the limited profile width.
Innovation Solution
A handle arrangement featuring a side cap that covers part of the base body's side surface, allowing the base body to be offset from the center, with a convex shape to accommodate protruding parts and a cover rosette that interacts with the side cap to create a closed construction, enabling assembly on very narrow frames and maintaining a clean visual appearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the base body is mounted centrally on the frame profile, then the cover rosette occupies the central position and provides a symmetrical appearance, but there is insufficient space for installation on narrow frame profiles
Solution Approach 1:
The patent applies asymmetry by introducing a side cap that covers the asymmetrically positioned base body when mounted on narrow frame profiles. This allows the handle assembly to be installed off-center while maintaining an aesthetically pleasing appearance through the convex side cap design that conceals the asymmetric arrangement.
Solution Approach 2:
The side cap is designed in advance with a convex shape that anticipates the need to cover asymmetrically positioned components. By pre-forming the side cap with this shape, the patent enables flexible mounting positions on narrow frames while maintaining aesthetic appearance without requiring additional adjustment during installation.
2Area of stationary object
If the frame profile width is reduced to allow larger glazing area, then visual impression and lighting conditions improve, but the available space for handle assembly becomes insufficient
Solution Approach 1:
The patent utilizes the third dimension by extending the side cap convexly beyond the frame profile surface. This dimensional extension provides the necessary space to accommodate the base body and gearbox components on narrow frame profiles without compromising the two-dimensional glazing area, effectively moving the handling components into a protruding spatial zone.
Solution Approach 2:
The side cap functions as a flexible covering element that can be shaped to accommodate various component arrangements. Its convex design allows it to envelop the base body and gearbox, providing a sleek external surface that conceals the internal component layout and adapts to the limited space constraints of narrow frame profiles.
3Ease of operation
If the base body protrudes from the frame profile to provide mounting space, then installation is feasible on narrow frames, but the circumferential side surface becomes visible and aesthetically unpleasing
Solution Approach 1:
The side cap extracts the aesthetic function from the base body's circumferential side surface by covering it completely. The base body can protrude to provide necessary mounting space while the side cap serves as a separate aesthetic element that conceals the protrusion, separating the functional requirement (space) from the aesthetic requirement (appearance).
Solution Approach 2:
The side cap acts as a flexible shell that envelops the protruding base body and gearbox components. This shell-like structure provides a continuous, sleek external surface that hides the internal component arrangement and protrusion from view, maintaining aesthetic appearance while allowing functional components to extend beyond the frame profile.
Data Source
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AI summary
The handle arrangement (5) has handle (9), main portion (11) and covering rosette (14). A bearing mount (35) which serves for the rotary mounting of the handle is arranged in the main portion. The main portion which is covered by covering rosette has an encircling side surface (32) and front side (33). A side cap (13) engages over just one region (44) of side surface of main portion and has a peripheral edge (23) which is positioned against or is located opposite a side surface of frame profile of window or door to form blind joint. An independent claim is included for window, door.