High-Pressure Cleaner Hood Alignment for Easier Locking
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Solution Overview
Problem
High-pressure cleaning devices are difficult to handle due to complex alignment and locking mechanisms, making it challenging for users to efficiently pivot and secure the hood in a closed position.
Innovation Solution
Incorporating an alignment device with first and second alignment elements on the hood and housing rear wall, respectively, which couple before the locking elements, allowing for easier alignment and locking of the hood relative to the rear wall, reducing the required pivoting angle and improving handling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the hood is locked using only locking elements, then the hood can be securely locked in the closed position, but the alignment process becomes difficult and requires a larger pivoting angle
Solution Approach 1:
The locking mechanism is segmented into two distinct functional components: alignment elements and locking elements. The alignment elements (protrusions and recesses) handle the positioning and guiding function, while the locking elements (lugs and receptacles) handle the secure locking function. This segmentation allows each component to be optimized for its specific purpose, resolving the contradiction between secure locking and easy alignment.
Solution Approach 2:
The alignment elements perform a preliminary action by establishing correct alignment between the hood and housing before the locking elements engage. As the hood is pivoted into the closed position, the alignment protrusions guide the hood into proper alignment with the alignment recesses first, and only then do the locking lugs engage with the locking receptacles. This preliminary alignment action simplifies the overall closing operation and reduces the required pivoting angle.
2Device complexity
If the hood is designed with a simple locking mechanism, then the device structure is simpler, but the hood cannot be reliably locked in the closed position
Solution Approach 1:
The alignment function and locking function are merged into a single integrated mechanism where alignment elements and locking elements work together in sequence. The alignment protrusions and recesses are positioned on the same components that contain the locking lugs and receptacles, allowing both functions to be achieved without adding separate complex mechanisms. This merging maintains structural simplicity while ensuring reliable locking through the coordinated action of both element types.
3Reliability
If the alignment elements couple after the locking elements, then the hood is securely locked, but the alignment occurs too late to guide proper positioning
Solution Approach 1:
The alignment elements are positioned and dimensioned to engage in advance of the locking elements during the hood closing motion. The alignment protrusions and recesses are located such that as the hood is pivoted toward the closed position, the alignment features make contact first and establish the correct relative positioning. Only after this preliminary alignment is achieved do the locking lugs and receptacles engage, ensuring both precise alignment and secure locking.
Solution Approach 2:
Different regions of the hood and housing components have different functional qualities: the alignment protrusions and recesses are designed with geometry optimized for guiding and positioning (tapered shapes, larger clearance), while the locking lugs and receptacles are designed with geometry optimized for secure engagement (interlocking shapes, smaller clearance). This local differentiation of quality ensures that alignment occurs with proper guidance while locking provides secure fixation.
Data Source
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AI summary
The invention relates to a high-pressure cleaning device (10) comprising a housing (24) that has a hood (26) and a housing rear wall (28), said hood (26) being pivotable from an open position in which the housing (24) is open into a closed position in which the housing (24) is closed. The high-pressure cleaning device (10) comprises a locking device (74) with at least one first locking element (76) that is arranged on the hood (26) and at least one second locking element (72) that couples with the first locking element (76) in the closed position of the hood (26) in order to lock same. The aim of the invention is to further develop such a high-pressure cleaning device such that said device can be operated in an easier manner. According to the invention, this is achieved in that the high-pressure cleaning device (10) comprises an aligning device (64) with at least one first aligning element (62, 90, 92) that is arranged on the hood (26) and at least one second aligning element (58, 60, 86, 88) which is molded on the housing rear wall (28) and which couples with the at least one first aligning element (62, 90, 92) in order to align the hood (26) relative to the housing rear wall (28). The at least one first aligning element (62, 90, 92) and the at least one second aligning element (58, 60, 86, 88) couple with each other upon pivoting the hood (26) from the open position into the closed position while moving over a smaller pivoting angle than when the at least one first locking element (76) and the at least one second locking element (72) couple with each other.