Resilient Tenterhook for V-Shaped Frame Profiles
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Solution Overview
Problem
Existing stretching hooks are limited in their application and design flexibility due to their rigid shape, restricting their use to specific types of stretch frames, particularly those with hollow frame tubes and not accommodating corner installations effectively.
Innovation Solution
The stretching hook features a resilient connecting component attached via coil springs to a coupling element with a right-angled triangular second part, allowing it to be securely locked in V-shaped profile cross sections, enabling installation in various frame types, including corners, through a mechanism where the second part's end catches on a protrusion, providing stability and versatility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the stretching hook uses a rigid shape, then the structure is simple and strong, but the field of application is restricted and design freedom is reduced
Solution Approach 1:
The stretching hook is divided into multiple planar parts (first planar part, second planar part, connecting component) that can move relative to each other through resilient connections and coil springs. This segmentation allows the hook to adapt to different frame configurations while maintaining structural integrity through the modular design.
Solution Approach 2:
The stretching hook transitions from a rigid structure to a dynamic one with resilient connections and coil springs that allow movement and adjustment. The second part can rotate relative to the first part, and the connecting component can flex, enabling the hook to accommodate various frame types and corner installations while maintaining strength through controlled flexibility.
2Adaptability or versatility
If the stretching hook is designed for hollow frame tubes, then the coupling is secure, but the design freedom for stretch frame profiles is limited
Solution Approach 1:
The stretching hook is designed with universal compatibility across different frame profiles including hollow tubes, V-shaped profiles, and square corners. The coupling element with its resilient connections and the second part's ability to catch on protrusions enables it to function securely across multiple frame types, achieving multi-functionality without sacrificing reliability.
Solution Approach 2:
The hook's configuration parameters can change through the resilient connections and coil springs, allowing it to adapt to different frame profile geometries. The second part's angular position relative to the first part can vary, enabling the hook to accommodate different profile shapes while maintaining secure coupling through the catching mechanism on protrusions.
3Ease of operation
If the stretching hook uses a rigid connection, then the manufacturing is simple, but the installation in corner positions is difficult
Solution Approach 1:
The connection mechanism incorporates resilient connections and coil springs that allow the second part to rotate and adjust during installation. This dynamic capability enables easy installation in corner positions where the hook needs to adapt to the frame geometry, while the resilient nature ensures secure locking once installed.
Solution Approach 2:
The coil springs act as intermediaries between the first and second parts, facilitating smooth adjustment and installation in corner positions. These springs mediate the transition between different angular configurations, making installation easier while the resilient connection ensures reliable locking in the final position.
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
This design enhances the hook's applicability to a broader range of stretch frames, including those with constant cross-sectional profiles and square corners, ensuring a stable and secure mounting of eyelet-containing canvases, while maintaining flexibility and adaptability.
Implementation Method 1
the connecting component is connected via at least one coil spring to the first planar part of the coupling element
Implementation Method 2
at least one of the planar parts and/or the connection between the two planar parts is resilient
Implementation Method 3
at least one of the planar parts and/or the connection between the two planar parts is resilient
Data Source
Figure 1~2
Figure 3~4
Figure 5~7
AI summary
A stretching hook (7) for stretching in a stretch frame an eyelet-containing canvas has a hook (13) and a coupling element (17) resiliently connected to the hook via a connecting component (15), which coupling element is formed by a first planar part (19) which is connected to the connecting component (15), and a second planar part (21) which is connected to the first part. The connecting component (15) is attached to the hook (13) and is connected to the first part via two coil springs (23). The profiles (5) of the stretch frame are formed by two strips (25) and (27) present at an angle relative to each other and fitted to each other over a longitudinal raised edge, between which strips the stretching hooks (7) are clamped by the coupling element (17). The strip (27) has a protruding raised edge (31) which is caught by the second end (21b) of the second part (21).