Hinge-Side Finger Protection Device with Resilient Clip
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Solution Overview
Problem
Existing finger protection devices for wing doors, especially on the hinge side, are difficult to remove without damaging them, making them cumbersome during door assembly or renovations, and often require special tools.
Innovation Solution
A hinge-side finger protection device featuring a protective profile that can be easily and non-destructively attached and detached from a resilient clip fastening mechanism, allowing for quick installation and removal without special tools, and designed to be cost-effective and visually appealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional fastening methods (screws, gluing, clipping) are used to attach protective profiles to door frames, then the protective profile is securely fixed, but the removal process becomes difficult, time-consuming, and may cause damage
Solution Approach 1:
The fastening system transitions from a static permanent connection to a dynamic reversible connection. The resilient clip utilizes elastic deformation to create a snap-fit mechanism that provides strong fixation during use but allows easy removal when force is applied to overcome the elastic retention force.
Solution Approach 2:
The material properties of the clip are selected to provide appropriate elastic modulus and resilience. The clip is designed with specific geometric parameters (thickness, curvature, leg dimensions) that enable it to deform elastically during attachment and release, changing its mechanical state between fixed and removable conditions.
2Strength
If permanent fastening methods are used, then the protective profile remains securely in place during door use, but removal requires special tools and may damage the door frame or profile
Solution Approach 1:
The resilient clip is designed as a simple, inexpensive fastening element that can be easily replaced if needed. Its plastic or elastomeric material allows it to be manufactured at low cost, making the system economically viable for single-use or limited-life applications where non-destructive removal is prioritized over permanent durability.
Solution Approach 2:
The clip's elastic properties enable it to provide strong holding force during normal door operation while allowing controlled deformation for removal. The dynamic behavior of the elastic material creates a force threshold that maintains secure fixation but can be overcome with manual effort for damage-free removal.
3Ease of operation
If complex fastening mechanisms are used to enable easy removal, then the protective profile can be quickly detached, but the device complexity and manufacturing cost increase
Solution Approach 1:
The fastening system is divided into separate functional components: the resilient clip (fastening element), the protective profile (covered element), and the door frame (mounting surface). This segmentation allows each component to be optimized independently and simplifies manufacturing, assembly, and replacement of individual parts.
Solution Approach 2:
The resilient clip performs multiple functions automatically: it attaches the protective profile to the door frame, maintains secure fixation during door operation, and enables easy removal when force is applied. The elastic material self-regulates the fixation force, eliminating the need for additional locking mechanisms or complex adjustment systems.
4Adaptability or versatility
If resilient clip fastening is used, then the protective profile can be easily removed and reattached, but the clip must be precisely designed to provide adequate holding force
Solution Approach 1:
The clip's geometric parameters (thickness, curvature radius, leg dimensions, material modulus) are carefully selected to achieve the desired balance between holding force and ease of removal. These parameters are optimized through design calculations and testing to ensure the clip provides sufficient fixation strength while remaining manufacturable with standard tolerances.
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 cost-effective installation and removal of the finger protection device, preserving the door's appearance and facilitating quick processing during door assembly or renovations, while providing effective protection against finger pinching.
Implementation Method 1
The clip is preferably designed to be axially symmetrical in cross section... the at least one fastening means is a clip, in particular a resilient clip
Data Source
Figure 1
Figure 2~3
Figure 4~6
AI summary
The invention relates to a hinge-sided finger protection device for a wing door, comprising at least a protective profile (1) and at least a fastening means (3) for fastening the protective profile (1) to a door frame (R) of the wing door. The protective profile (1) can be plugged onto the fastening means (3), wherein the protective profile (1) accommodates in itself the fastening means (3) in the plugged-on state. The protective profile (1) is non-destructively removable from the fastening means (3) and can be again plugged thereon. The at least one fastening means is preferably a clip (3).