Door Handle Bearing Screwless Clamping Mount
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Solution Overview
Problem
Existing handle bearings for doors and windows require screwing for secure attachment, which can be inconvenient and may not always provide a reliable non-rotatable fixation.
Innovation Solution
A handle bearing design featuring a lower rosette with a clamping element that can be fixed to a door or window sash without screws, using a profile pin and bearing flange with a neck part that inserts into the handle neck, and a clamping casing with steps to spread radially for secure attachment, along with a non-rotatable connection between the lower and cover rosettes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the lower rosette is attached to the door leaf or window sash using screws, then the attachment is secure and reliable, but the installation process becomes more complex and time-consuming
Solution Approach 1:
The invention extracts the screw fastening operation from the installation process by using a press-fit clamping mechanism. The lower rosette is equipped with a clamping element that can be pressed into a cylindrical opening and rotated to clamp the bearing flange, eliminating the need for screws and simplifying installation while maintaining secure attachment.
Solution Approach 2:
The clamping element is designed to be self-securing through rotation. When the lower rosette is rotated relative to the clamping element, the clamping element automatically clamps the bearing flange without requiring additional fastening operations. The mechanism serves itself by converting rotational motion into clamping force.
2Device complexity
If the lower rosette is attached without screws using a clamping mechanism, then the installation is simpler and faster, but the rotational fixation reliability may be compromised
Solution Approach 1:
The clamping element transitions from an unclamped state to a clamped state through rotation. During installation, the lower rosette is inserted with the clamping element in a relaxed state, then rotated to engage the clamping teeth with the bearing flange, dynamically transforming the attachment from loose to securely fixed.
Solution Approach 2:
The invention adds a rotational dimension to the attachment process. The lower rosette is inserted axially into the opening and then rotated about the longitudinal axis to engage the clamping element. This second degree of freedom (rotation) provides the locking action that ensures rotational fixation reliability without screws.
3Reliability
If the clamping element is designed with multiple spreading sections, then the clamping force and fixation reliability are improved, but the device structure becomes more complex
Solution Approach 1:
The clamping element is segmented into multiple clamping sections (first, second, and third sections) that can spread radially outward independently. Each section has clamping teeth that engage with corresponding features on the bearing flange, distributing the clamping force across multiple contact points to enhance reliability.
Solution Approach 2:
The clamping element is designed with nested spreading sections where the first, second, and third sections are arranged concentrically. When the lower rosette is rotated, these sections spread outward in a nested sequence, with each section providing an additional layer of clamping force. The sections are integrated into a single piece that can be manufactured as one component.
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
Enables simple and reliable attachment of the handle bearing to a door or window sash without screws, ensuring secure and non-rotatable fixation, enhancing ease of installation and stability.
Implementation Method 1
The clamping element (6) can be pressed into a cylindrical opening (58) in the door leaf (200) or window sash (201) and fixed in the opening in the door leaf or window sash by rotating the lower rosette (5) relative to the clamping element (6).
Data Source
Figure 1
Figure 2~4
Figure 5~7
AI summary
The invention relates to a handle bearing for a door or window handle (2) having a gripping part (21) and a handle neck (22), in particular for public buildings, comprising: - a lower rosette (5) which can be mounted in a recess on one side of a door leaf or window sash in a rotationally fixed manner; - a covering rosette (4) which covers the lower rosette (5) toward the handle (2); - a profiled pin (7), rotatable about its longitudinal axis, for actuating a door lock or window lock, wherein: - the profiled pin (7) extends through bearing openings (46, 52) in the lower rosette (5) and in the covering rosette (4) and through a profiled pin receptacle (36) of a bearing flange (3) which surrounds the profiled pin (7); - the bearing flange (3) has, on the side thereof facing the handle (2), a neck part (31, 32) for fastening the handle (2), which neck part can be inserted into the end opening (23) in the handle neck (22); - on the side of the lower rosette (5) facing away from the neck part (31, 32) of the bearing flange (3), a clamping element (6) is arranged which can be pressed into a cylindrical opening in the door leaf or window sash; - a clamping jacket (53) of the lower rosette (5) can be inserted into the clamping element (6) and clampingly fixed in the opening in the door leaf or window sash by rotation of the lower rosette (5) relative to the clamping element (6).