Door Handle Rose with Nested Resilient Spring
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Door handle components tend to come loose, leading to jamming or deformation, especially in high-end or safety-regulated applications, and the weight of large or heavy handles can stress the spring mechanism, reducing its lifespan.
Innovation Solution
A rose for a door handle system featuring a rotatable member with a resilient coiled spring that biases the handle to a specific position, providing smoother rotation and resistance against gravity, made from a zinc aluminum alloy and polycarbonate for reduced weight and increased durability, with a design that includes a spindle receiving aperture for secure coupling and visual indicators for correct installation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If large and/or heavy handles or knobs are fitted to the door, then the aesthetic appearance and security perception are improved, but the rose becomes prone to breaking or deforming with use and the spring mechanism experiences increased stress
Solution Approach 1:
The rose is divided into a two-piece construction with a first piece and a second piece that can be independently replaced. The resilient member is housed in a recess with a specific configuration that separates the spring mechanism from the handle components, allowing the handle to be replaced without affecting the spring mechanism integrity.
Solution Approach 2:
The resilient member is nested within a recess in the rose body, with the rotatable member positioned within the recess to engage the resilient member. This nested configuration protects the spring mechanism while allowing it to function independently from the handle weight.
2Ease of manufacture
If conventional door handle components are used, then the initial installation is simple, but the components come loose from one another leading to jamming of the latch mechanism
Solution Approach 1:
The first piece and second piece of the rose are designed to be securely coupled together with the resilient member and rotatable member forming an integrated assembly. The specific configuration of the recess and the engagement features ensure that components remain firmly connected during operation, preventing the loosening and jamming issues associated with conventional separate components.
3Force
If the resilient member is positioned with a large angle between free end and fixed end, then the spring provides stronger biasing force, but the spring becomes more susceptible to warping and deformation over time
Solution Approach 1:
The recess is configured with specific geometric characteristics including a depth and width that are optimized to constrain the resilient member in a way that distributes stress evenly. The rotatable member engages the resilient member at a specific location within the recess, creating a localized stress distribution pattern that reduces overall spring deformation while maintaining adequate biasing force.
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 ensures smooth and consistent operation of the door handle, reduces the risk of jamming, and extends the lifespan of the rose by minimizing stress on the spring mechanism, while also providing a visually appealing and secure attachment to the door.
Implementation Method 1
a resilient member coiled about the first axis, the resilient member comprising a fixed end and a free end, wherein the fixed end is fixed to the body and the free end is coupled to the rotatable member; wherein the resilient member biases the rotatable member to a first position
Implementation Method 2
the resilient member coiled about the first axis... the resilient member biases the rotatable member to a first position
Data Source
AI summary
There is a rose for a door handle, the rose comprising a body comprising a first face; a rotatable member configured to rotate about a first axis, the rotatable member comprising an outer perimeter; a spindle receiving aperture extending along the first axis, wherein the spindle receiving aperture extends through the body and the rotatable member; and a resilient member coiled about the first axis, the resilient member comprising a fixed end and a free end, wherein the fixed end is fixed to the body and the free end is coupled to the rotatable member; wherein the body comprises a recess defined by an inner perimeter, the recess configured to house the resilient member and the rotatable member; wherein the resilient member biases the rotatable member to a first position and in the first position the angle between the free end and the fixed end relative to the centre of the coiled resilient member is at least 90 degrees. There is further described a handle system for a door.