Universal Handle Assembly With Rotatable Handing Selection
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Solution Overview
Problem
Existing lock systems require dedicated components for different door leaf handings, leading to high component diversity and installation complexity, with a risk of errors during handling selection.
Innovation Solution
A handle assembly with a rotatable handing element and distinct stops allows easy setting of handing during installation, using a spring for return functionality and snap-fit engagement to secure the element in place, reducing the need for multiple components and simplifying installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dedicated handle assemblies are produced for each door leaf handing type, then the handing can be accurately defined, but the component diversity increases and storage requirements increase
Solution Approach 1:
The handle assembly is designed with a rotatable handing element that can be positioned in different orientations to accommodate various door leaf handings (RH, LH, RHR, LHR). This single universal handle assembly can serve multiple handing types by rotating the handing element to the appropriate position, eliminating the need to produce and store separate dedicated handle assemblies for each handing type while maintaining accurate handing definition through the stop-engagement mechanism
2Ease of operation
If the handling element is made rotatable to allow easy setting during installation, then the installation ease improves, but the device complexity increases
Solution Approach 1:
The handing element is designed to be rotatable relative to the base structure, allowing the installer to easily adjust and set the desired handing orientation during installation. The rotation is constrained by stops that engage with features on the base structure, providing precise positioning. This dynamic rotatable design simplifies installation compared to fixed handle assemblies requiring complex adjustment procedures, while the overall complexity remains manageable due to the straightforward rotation-and-lock mechanism
3Reliability
If multiple dedicated components are used for different handings, then the handing specificity is improved, but the installation time increases
Solution Approach 1:
The handle assembly is pre-configured with a rotatable handing element that can be quickly adjusted to the desired orientation during installation. The stops are pre-positioned on the base structure to engage with corresponding features on the handing element, allowing for rapid and accurate handing selection without requiring multiple different components or complex assembly procedures. This preliminary design enables specific handing to be achieved efficiently during installation
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 accurate and error-free handling selection with simplified installation, allowing for two-way handle return and reduced component diversity.
Implementation Method 1
the handle is rotatable relative to the handing element about the rotation axis against a deformation of the spring
Data Source
AI summary
A handle assembly (12a, 12b) comprising a base structure (26a, 26b) for fixation to an access member (18a, 18b); a handing element (38a, 38b); a spring (40a, 40b); and a handle (28a, 28b); wherein the handing element is rotatable relative to the base structure about a rotation axis (30) together with the spring and the handle between a first handing position (54a) and a second handing position (54b); wherein the handle is rotatable relative to the handing element about the rotation axis against a deformation of the spring when the handing element is in the first handing position and in the second handing position; and wherein the base structure comprises a first stop (48a) arranged to be engaged by the handing element to define the first handing position and a second stop (48b) arranged to be engaged by the handing element to define the second handing position.