Oven Front Panel Mounting for Tolerance-Compensated Edge Alignment
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Solution Overview
Problem
Existing household cooking appliances, such as ovens, face challenges in precise mounting of their components due to manufacturing tolerances, leading to misalignments and aesthetic issues.
Innovation Solution
The implementation of hooking means on both the fore component and the covering element, allowing for a loose coupling with play, enables precise alignment and secure fixing of the covering element on the fore component, facilitating easy assembly and ensuring parallel edges, thereby overcoming misalignment issues.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional threaded fixing members (stud bolts) are used to mount the covering element, then the covering element can be securely fixed to the structure, but misalignments occur between the covering element and door edges due to production tolerances
Solution Approach 1:
The invention changes the geometric parameters of the fixing system by replacing precise threaded holes with enlarged through-holes that accept rounded-headed fixing members. This parameter change allows the fixing members to bridge tolerance gaps while maintaining secure attachment, resolving the contradiction between reliable fixing and precise alignment.
Solution Approach 2:
The fixing system is segmented into two independent functions: positioning (achieved through the rounded heads bearing on the fore component) and securing (achieved through the threaded engagement). This segmentation allows each function to be optimized independently, enabling both secure fixing and tolerance compensation.
2Manufacturing precision
If precise positioning holes are provided for stud bolts, then alignment can be achieved in theory, but production tolerances cause misalignments that ruin the aesthetic appearance
Solution Approach 1:
The rounded-headed fixing members act as disposable tolerance-compensating elements. Their simple geometry and rounded heads allow them to be easily manufactured and inserted, absorbing the misalignment caused by production tolerances without requiring precision machining of the through-holes.
3Ease of operation
If the diameter of through holes is made slightly larger than the stem diameter to facilitate insertion, then assembly becomes easier, but misalignments between components increase
Solution Approach 1:
The fixing system transitions from a static precise-fit approach to a dynamic tolerance-absorbing approach. The rounded heads can move freely during insertion and then bear against the fore component surfaces, dynamically adapting to misalignments while maintaining secure fixation.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
A cooking appliance, in particular an oven, has a structure, articulated to which is a front door (5). Secured via fixing means (16-19) to a fore component (4) of the structure is a covering element (10) of a user interface. The door (5) and the covering element (10) are mounted on the structure in such a way that, in the condition where the door (5) is closed, defined between a lower edge (10a) of the covering element (10) and an upper edge (5a) of the door (5) is an interstice (G). The fore component (4) of the structure and the covering element (10) have means for mutual hooking (14-15), pre-arranged to provide between them a loose coupling, with play. The fixing means (16- 19) are pre-arranged for enabling the covering element (10) to be secured in a fixed position on the fore component (4) in one of a plurality of possible alternative positions allowed by the play provided by the hooking means (14-15).