Cooktop Control Housing Snap-Fit Assembly Without Screws
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The manufacturing of cooktops, particularly induction cooktops, is hindered by the time-consuming and costly process of screwing a control housing to a support plate, which complicates assembly and increases production costs.
Innovation Solution
A hob design featuring hooks and corresponding recesses on the support plate and control housing allows for a quick and secure attachment in one direction, with a movable projection and locking device ensuring a form-fit connection that can be released for repairs, potentially eliminating the need for screws.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If self-tapping screws are used to connect the control housing to the support plate, then the connection is secure and reliable, but the assembly process becomes time-consuming and manufacturing costs increase
Solution Approach 1:
The connection system is segmented into multiple functional elements: hooks on the support plate, recesses on the control housing, movable projections for automatic engagement, and locking devices with detents. This segmentation allows each element to perform a specific function, achieving secure connection through the combined action of multiple simple components rather than relying on complex screw fastening
Solution Approach 2:
The hooks and recesses are pre-positioned on the support plate and control housing respectively, allowing the components to automatically engage when brought together. The movable projections are pre-configured to snap into the recesses during assembly, and the locking devices with detents are pre-arranged to automatically lock the connection, eliminating the need for time-consuming manual screw fastening operations
2Reliability
If self-tapping screws are used to connect the control housing to the support plate, then the connection is secure, but the manufacturing cost increases
Solution Approach 1:
The connection system uses simple, inexpensive components such as hooks, recesses, movable projections, and locking devices that can be easily manufactured and replaced if needed. These components are simpler and cheaper than self-tapping screws, reducing material costs and manufacturing complexity while maintaining adequate connection reliability for the application
Solution Approach 2:
Multiple connection functions are merged into an integrated system where hooks provide initial engagement, movable projections provide automatic snapping, and locking devices with detents provide secure locking. This merging of functions into a unified connection mechanism eliminates the need for separate screw fastening operations, reducing manufacturing steps and costs
3Productivity
If hooks and recesses are used for attachment, then assembly is simplified and accelerated, but the connection may not be secure enough without additional locking
Solution Approach 1:
The locking devices with detents are pre-positioned in the connection path, so that when the control housing is attached to the support plate, the movable projections automatically engage with the detents during the assembly motion. This preliminary positioning ensures that the locking action occurs automatically as part of the assembly process, providing secure connection without requiring additional manual locking steps
Solution Approach 2:
The connection system is designed to be self-securing through the automatic engagement of movable projections with locking device detents. The geometry of the components is arranged so that the assembly motion itself forces the projections into the locked position, making the connection secure without requiring external intervention or additional fastening operations
Data Source
Figure 1A~1B
Figure 2A~2B
Figure 3A~3B
AI summary
A cooktop (11) has a support plate (13) for mounting heating elements on it and a control housing (20) for a control unit or electronics, wherein connecting means (17, 23) are provided for the detachable connection of the support plate (13) and the control housing (20) to each other. The connecting means have hooks (17) on the support plate (13) and corresponding recesses (23) on the control housing (20), wherein the hooks (17) are designed to engage with the recesses (23) in an engagement direction (A) and to subsequently move the two parts (13, 20) relative to each other in a final direction (E) that differs from the engagement direction (A). A movable projection (26) is provided on the control housing (20) and a recess for the projection (26) is provided on the support plate (13). When moving into the final position, the projection (26) is moved into the recess and in the final position acts as a positive locking mechanism with the locking device (18).