Washer Nozzle Flow Channel Shape Consistency via Flange Abutment
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Solution Overview
Problem
Conventional washer nozzles face challenges in enlarging the flow channel while maintaining shape consistency and preventing resin leakage, which affects the spray range of cleaning solutions.
Innovation Solution
A nozzle design featuring a main body member with a recessed part, a lid member with a flange part, and a covering member, where the flange part abuts the main body member to maintain constant insertion and prevent resin leakage, forming a flow channel that is pivotably supported and molded to ensure precise shape retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the nozzle main body is inserted in the recessed housing part to form a flow channel, then the nozzle structure is compact, but the flow channel cannot be enlarged and spray range is limited
Solution Approach 1:
The nozzle is divided into multiple segments: a first divided body with a recessed groove, a second divided body that covers the groove, and a nozzle main body. This segmentation allows the flow channel to be enlarged by combining multiple components while maintaining structural organization and avoiding excessive complexity through modular design.
Solution Approach 2:
The flow channel is extended in the radial direction by adding the recessed groove and covering structure, rather than only increasing length in the axial direction. This dimensional approach allows enlargement of the flow channel volume without proportionally increasing overall nozzle length or complexity.
2Volume of moving object
If the divided bodies are connected to enlarge the flow channel, then the spray range increases, but resin leakage occurs and causes variations in flow channel shape
Solution Approach 1:
A resin seal is预先 (pre) formed in the recessed groove of the first divided body before assembling the second divided body. This preliminary sealing action prevents resin leakage during the connection process, ensuring consistent flow channel shape and spray characteristics while allowing the flow channel to be enlarged through the divided structure.
3Volume of moving object
If the nozzle main body is inserted deeply to form a larger flow channel, then spray range increases, but insertion depth variations cause shape variations
Solution Approach 1:
The resin seal acts as an intermediary element between the first and second divided bodies. It provides a consistent sealing surface that accommodates the nozzle main body at a fixed depth, ensuring uniform flow channel shape across multiple nozzles while still allowing sufficient insertion depth to create an enlarged flow channel for wide spray range.
Data Source
AI summary
An object of the present invention is to suppress variations in shape of flow channels to have an enlarged flow channel. When an attachment main body 51 of a lid member 50 is attached to a recessed attachment part 46 of a main body member 40, a pair of flange parts 52 provided to the lid member 50 abuts on the main body member 40. Therefore, the insertion amount of the attachment main body 51 into the recessed attachment part 46 in each product can be maintained approximately constant while enlarging a main channel MC and a pair of sub channels SS1 and SS2, which are formed by the main body member 40 and the lid member 50, and variations in shape of these flow channels can be reliably suppress. The contact surfaces between the lid member 50 and the main body member 40 can be bent by providing the flange parts 52, and when forming a covering member 60, the molten resin can be prevented from leaking from the outside of the lid member 50 toward the main flow channel MS and the pair of sub flow channels SS1 and SS2, and as a result, variations in shape of the flow channels can be reliably suppressed.