U-Shaped Window Profile Connector With Variable Beading
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Solution Overview
Problem
Existing plug-in joining members for window frame profiles, particularly hollow profiles for glass panel struts, face challenges in easy and secure installation due to limited tolerance and potential slipping during insertion, which affects the reliability and durability of the connection.
Innovation Solution
A plug-in joining member with a U-shaped cross-section featuring a bottom wall with longitudinal central beading and side beadings of varying heights, friction claws with increasing cam radii towards the central line, and uniform stiffness to ensure consistent adhesion and resistance, facilitating easier insertion and secure fixation within the profile channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the joining member has uniform beading depth throughout, then the structure is simpler to manufacture, but the insertion process becomes difficult due to insufficient flexibility in the middle area
Solution Approach 1:
The patent applies local quality by creating non-uniform beading depth in the middle area of the bottom wall. The beading in the middle section has greater depth than at the ends, creating localized flexibility where it is most needed during insertion. This allows the joining member to be manufactured with a simple continuous beading process while achieving the flexibility required for easy insertion into the profile channel.
2Manufacturing precision
If the joining member height tolerance is tight, then the connection precision is improved, but the insertion process becomes difficult due to lack of flexibility
Solution Approach 1:
The patent resolves this contradiction by implementing local variation in beading depth. The middle area has deeper beading that provides flexibility and tolerance compensation during insertion, while the end areas maintain tighter dimensional control. This localized approach allows the overall joining member height tolerance to remain tight for precise connections, while the middle section provides the necessary flexibility for easy insertion.
3Ease of manufacture
If the friction claws have uniform cam radius, then the manufacturing is simpler, but the adhesion consistency varies across different friction claws
Solution Approach 1:
The patent applies local quality by varying the cam radius of friction claws based on their position. Friction claws closer to the middle of the joining member have larger cam radii, while those near the ends have smaller cam radii. This positional variation compensates for the different leverage and mechanical advantages at various locations, ensuring that all friction claws provide consistent adhesion force despite their different positions.
Solution Approach 2:
The patent changes the geometric parameter of the friction claws by progressively varying the cam radius. Instead of using a uniform cam radius for all friction claws, the design progressively adjusts the cam radius based on position, optimizing the mechanical performance and adhesion consistency of each friction claw according to its specific location in the assembly.
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 design enhances the tolerance and stiffness of the joining member, allowing for reliable and durable connections by preventing slipping and maintaining consistent holding force across all friction claws, ensuring a more efficient and secure installation process.
Implementation Method 1
friction claws on side walls at the both sides which are turned towards the central line of the joining member
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
Plug-in joining member (1) designed to make connections between ends of window frame profiles is formed as an elongated piece with nearly U-shaped cross-section and comprising a bottom wall (2) and side walls (3) adjacent to the bottom wall (2) down its side edges. Side walls (3) of the joining member (1) are provided with friction claws (4), arranged at the both sides of the central line (O) and turned towards the central line (O) of the joining member (1). The bottom wall (2) has a longitudinal central beading (9) and two longitudinal side beadings (10) arranged at the both sides of the central beading (9), where the bottom (11) of the central beading (9) extends lower than bottoms (12) of side beadings (10).