Window Locking Part Oblique Clamping Mechanism
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing locking parts for windows and doors in aluminum frames face issues with corrosion and loosening due to material differences and thermal expansion, and existing solutions are cumbersome or provide limited clamping effectiveness.
Innovation Solution
A locking part design where a clamping element is tilted to insert obliquely into a receiving groove, then aligned parallel to the closing part, allowing it to clamp the groove's edges securely without damaging the coated surface, using a screw or clamping plate for secure fastening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a grub screw is screwed into the locking part to clamp it in the receiving groove, then the locking part is securely fastened, but the coated surface of the aluminum profile is damaged leading to corrosion
Solution Approach 1:
A flat clamping element is introduced as an intermediary between the locking part and the receiving groove edges. This clamping element has a clamping edge that engages behind the groove edges without penetrating or damaging the coated aluminum surface, thereby securing the locking part while preventing corrosion.
Solution Approach 2:
The locking part is divided into separate functional components: a locking part base body, a distinct clamping element, and a fastening element. The clamping element is tilted relative to the base body, allowing it to be inserted obliquely and engage behind the groove edges independently from the fastening mechanism.
2Ease of manufacture
If different materials (steel screws and zinc die-cast locking parts) are used, then the locking part can be manufactured, but the different coefficients of thermal expansion cause the locking part to loosen under thermal stress
Solution Approach 1:
The clamping element is designed with a tilted orientation relative to the locking part base body. This angular parameter change allows the clamping edge to engage behind the receiving groove edges at an oblique angle during insertion, creating a mechanical interlock that resists thermal expansion and contraction forces.
3Ease of operation
If a grub screw is inserted from above through an inclined threaded hole, then the locking part can be fastened, but the screw must protrude below the edge and contact the groove wall which damages the coated surface
Solution Approach 1:
The clamping element is tilted at an angle relative to the locking part base body, introducing a dimensional change in its orientation. This angular arrangement allows the clamping edge to engage behind the receiving groove edges in a different spatial dimension, achieving secure fastening without the fastening element needing to protrude and contact the groove wall.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The lock section, fitting into a groove in a window or door frame, has a base body (2) with at least one holder (8) at the upper side (5) for the lock handle. A flat clamp plate (3) is at the under side (22), secured by an adjustable fastener screw (4). The clamp and the fastener together can tilt in relation to the body on an axis (17) parallel to the groove.