Door Handle Removable Coupling Mechanism for Simplified Maintenance
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Solution Overview
Problem
Existing door and window handles are bulky, complex to maintain, and costly to replace, with multiple components and internal constraining systems that complicate their functionality and maintenance.
Innovation Solution
A handle design featuring a removable associating device with a cylindrical wall and bushing system, including sliders and elastic elements, allows for easy assembly, disassembly, and color changes without requiring technician assistance, reducing size and maintenance complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional handle design with multiple components and internal constraining systems is used, then the handle is reliable in function, but it becomes bulky and complex to maintain
Solution Approach 1:
The handle is divided into separate functional modules: a removable associating device (body) that couples to the door surface, and a separate operating element (handgrip) that couples to the control shaft. This segmentation allows each module to be optimized independently and simplifies maintenance by enabling replacement of only the necessary component.
Solution Approach 2:
The constraining system (spring means and positioning unit) is extracted from the associating body and integrated into the handgrip assembly. This extraction eliminates the need for internal constraining systems within the body, reducing its complexity and allowing it to serve purely as a mounting interface.
2Reliability
If multiple components and internal constraining systems are included in the handle, then the handle functions reliably, but replacement time and cost increase significantly
Solution Approach 1:
The handle is divided into separate functional modules: a removable associating device (body) that couples to the door surface, and a separate operating element (handgrip) that couples to the control shaft. This segmentation allows each module to be optimized independently and simplifies maintenance by enabling replacement of only the necessary component.
Solution Approach 2:
The design enables easy replacement of the associating body or handgrip independently without requiring disposal of the entire handle assembly. The removable coupling mechanisms allow selective replacement of worn or aesthetically outdated components, reducing replacement time and cost.
3Reliability
If the associating body houses the positioning unit and spring means, then the handle is functionally complete, but it requires technician assistance for maintenance and color changes
Solution Approach 1:
The handle is divided into separate functional modules: a removable associating device (body) that couples to the door surface, and a separate operating element (handgrip) that couples to the control shaft. This segmentation allows each module to be optimized independently and simplifies maintenance by enabling replacement of only the necessary component.
Solution Approach 2:
The simplified coupling mechanisms (grub screw for handgrip-to-shaft, and external coupling for body-to-shaft) are designed to be easily operated by end users without requiring technician assistance. Users can independently replace handgrips or entire handle assemblies for maintenance or aesthetic updates.
4Reliability
If a bulky design with internal constraining systems is used, then the handle provides complete functionality, but it cannot be easily customized for different colors or styles
Solution Approach 1:
The handle is divided into separate functional modules: a removable associating device (body) that couples to the door surface, and a separate operating element (handgrip) that couples to the control shaft. This segmentation allows each module to be optimized independently and simplifies maintenance by enabling replacement of only the necessary component.
Solution Approach 2:
The associating body is designed as a universal mounting interface that can accommodate different handgrip styles, materials, and colors. The standardized coupling mechanism allows the same body to work with various handgrip designs, enabling aesthetic customization without requiring changes to the mounting structure.
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 handle is simplified, reduced in size, and easier to maintain, with faster replacement times and lower costs, while maintaining reliability and aesthetic appeal.
Implementation Method 1
at least one elastic element (14) arranged between the slider (12) and the annular element (8) and configured to maintain the retracted position of the slider (12)
Implementation Method 2
the rotation of the handgrip (corresponding to the opening of the door or window and with a downwards direction) and of the ring determines the compression of the spring means which, once the handgrip is released by the user, allows the raising of the handgrip acting on the ring
Data Source
Figure 1
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Figure 3
AI summary
Described is a handle for a door or window comprising a handgrip (4) having a gripping portion (4a) and a base or neck portion (4b); means (5) for stable coupling of the neck (4b) of the handgrip (4) to the operating shaft (3); elastic means (6) positioned between the handgrip (4) and the operating shaft (3) and configured to allow the maintaining of the handgrip (4) in a predetermined first position corresponding to the closed configuration of the door or window; a removable device (7) for associating the handgrip (4) to the door (1) or window comprising an annular element (8) associated with the door (1) or window and having a cylindrical wall (8a) equipped with a first plurality of teeth (9); a bushing (10) associated with the neck (4b) of the handgrip (4) and having an annular edge (10a) equipped with a second plurality of teeth (11), delimiting an inner chamber (10b) of the bushing (10); the bushing (10) couples and contains, in use, the cylindrical wall (8a) with the first plurality of teeth (9) through a predetermined positioning of the handgrip (4), and a subsequent rotation of the handgrip (4) to obtain a coupling between the first (9) and the second (11) plurality of teeth and define a stable connection of the handgrip (4) to the door or window (1); a slider (12) for locking the coupling between the first (9) and the second (11) plurality of teeth, positioned in a radial seat (13) made on the annular element (8) and protruding between two successive teeth of the first plurality of teeth (9); the slider (12) is movable in the seat (13) between an advanced position of free rotation of the second plurality of teeth (11) and a withdrawn position for locking the second plurality of teeth (11) wherein the slider (12) is between two successive teeth of the second plurality of teeth (11). [Figure 1]