Clamping Device for Frame Mounting Without Drilling
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Solution Overview
Problem
Existing fastening devices for insect/particle protection grilles and doors often damage on-site frame systems, lack variability in frame width adaptation, and require complex manufacturing or drilling, making them difficult to install and remove without causing damage.
Innovation Solution
A fastening device with a ferrule-like clamping element that allows stepless adjustment to various window and door frame thicknesses and cross-sections, including rounded profiles, using a carrier with a threaded spindle and lever arms to apply clamping force without drilling, enabling easy installation and removal without damaging the frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If brackets, bracket springs, or hinge segments are screwed to the frame system, then secure fastening is achieved, but the on-site frame elements are damaged
Solution Approach 1:
The patent introduces a holding element as an intermediary component between the frame system and the attachment element. This holding element features a U-shaped holding angle that encompasses both the frame and attachment element, creating a detachable connection without direct screwing into the frame. The holding element acts as a mediator that transfers the fastening function while preserving the frame integrity.
2Adaptability or versatility
If a latching element is provided in the holding angle to adapt to different frame thicknesses, then versatility is improved, but manufacturing complexity and wear increase
Solution Approach 1:
The patent replaces static latching elements with dynamic resilient holding legs that can flexibly adapt to different frame thicknesses. The holding legs are designed to be resiliently rotatable, allowing them to automatically adjust their position and clamping force based on the frame width, eliminating the need for complex adjustable latching mechanisms.
Solution Approach 2:
The holding element is designed to self-adjust to different frame widths through the resilient properties of its holding legs. The legs automatically flex and rotate to match the frame thickness, providing adaptability without requiring external adjustment mechanisms or complex latching systems.
3Object-affected harmful factors
If wire holding elements with resilient holding legs are used, then damage-free fastening is achieved, but frame width variability is limited
Solution Approach 1:
The patent enhances the wire holding element design by making the holding legs resiliently rotatable rather than fixed. This dynamic capability allows the holding legs to flex and adapt to a wider range of frame thicknesses and cross-sections, including rounded profiles, while maintaining the damage-free fastening advantage of the wire construction.
4Strength
If a rotary spindle fastening device is used to clamp the frame, then secure fastening is achieved, but space requirements and installation complexity increase
Solution Approach 1:
The patent extracts the essential clamping function from the complex rotary spindle mechanism and implements it through simpler resilient holding legs that provide clamping force through elastic deformation. This eliminates the need for rotary spindles, long adjustment ranges, and complex mechanical assemblies while maintaining secure fastening capability.
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 device provides a secure, adjustable, and damage-free fastening solution for insect and particle protection systems, accommodating different frame widths and cross-sections with consistent holding power, and can be used on both window and door frames without the need for mirrored versions.
Implementation Method 1
a carrier (2) with a threaded spindle (3) and a carriage (4) which is displaceable on the threaded spindle (3) in the longitudinal direction of the threaded spindle (3)
Implementation Method 2
a lever arm (5) with a first end (51) pivotably connected to the carrier (2) and a second end (52) pivotably connected to the carriage (4), and a second lever arm (6) with a first end (61) pivotably connected to the carrier (2) and a second end (62) connected to the bracket (7)
Implementation Method 3
an elastic element (17), in particular a spiral spring, a torsion spring or a compression spring
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The fixing device (1) has a clamping element (7), movably connected to a base element (2). There is at least one lever element (5) between the base element and the clamping element. A power element (3) in the form of a turning spindle provides the clamping force for the clamping element, the clamping force being transferred by a transfer element (4, 6).