Nozzle Cover Positioning Structure to Prevent Cleaning Device Misalignment
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Solution Overview
Problem
Existing cleaning devices face issues with positioning accuracy of the cover with respect to the support, leading to impaired appearance and unexpected interference due to component tolerance or assembly errors.
Innovation Solution
The cleaning device incorporates a bracket and holder with retaining portions, an urging member providing an urging force, and a positioning member to prevent pivot motion about a non-parallel axis, enhancing positioning accuracy and reducing misalignment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If an urging member is used to retain the bracket and holder, then the retaining force is improved, but pivot motion and misalignment occur due to component tolerance or assembly error
Solution Approach 1:
A positioning member is introduced as an intermediary element between the bracket and holder to prevent pivot motion. This positioning member acts as a mediator that eliminates the harmful pivot movement caused by the urging force while allowing the retaining function to continue, thereby resolving the misalignment issue without reducing the urging force.
2Ease of manufacture
If component tolerance or assembly error exists, then manufacturing ease is improved, but positioning accuracy of the cover deteriorates
Solution Approach 1:
The positioning member is designed beforehand to compensate for potential pivot motions caused by component tolerances or assembly errors. By providing this preventive measure in advance, the system maintains high positioning accuracy even when manufacturing variations occur, without requiring stricter manufacturing controls.
3Adaptability or versatility
If the cover is movable with the nozzle, then the cleaning function is improved, but interference with the support may occur due to misalignment
Solution Approach 1:
The positioning member serves as a protective intermediary that prevents the cover from misaligning with the support during its movable operation. This ensures that the cover can move freely with the nozzle for cleaning functionality while the positioning member prevents harmful interference with the support structure.
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
This configuration improves the appearance and prevents interference between the cover and support, increasing manufacturing yield by alleviating component tolerance and assembly errors.
Implementation Method 1
an urging member providing an urging force that urges the second retaining member toward the edge portion
Data Source
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AI summary
A piston (13) displaces a nozzle (16) between a first position located outside a support (20) and a second position located inside the support (20) along a first axis (A1) while passing through an opening (21). A cover (11) covers the nozzle (16) as viewed from the outside of the support (20) in a direction along the first axis (A1), and moves with the nozzle (16) along the first axis (A1). A bracket (12) supports the piston (13), and has a first retaining portion (121) retained on an edge portion (22) of the opening (21) from the outside of the support (20). A holder (14) has a second retaining portion (141) facing the first retaining portion (121) from the inside of the support (20) with the edge portion (22) in between. An urging member (15) provides an urging force that urges the second retaining member (141) toward the edge portion (22). A positioning member (17) prevents a pivot motion of at least one of the bracket (12) and holder (14) about a second axis (A2) extending in a direction that is not parallel to the first axis (A1) caused by the urging force.