Spray Nozzle Positioning Structure Without Spring Fatigue
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Solution Overview
Problem
Conventional water spray guns with spring-based positioning structures suffer from spring fatigue and breakage, leading to loss of positioning function, increased maintenance costs, and user inconvenience.
Innovation Solution
A water spray gun design featuring a spray nozzle with recesses and an elastic member comprising a positioning head and elastic legs, which provides durable and stable positioning through elastic deformation and engagement with recesses, eliminating the need for springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a spring-based positioning structure is used, then the positioning function is initially reliable, but the spring fatigues and breaks after many switches and rotations
Solution Approach 1:
The patent removes the spring component from the positioning structure entirely. Instead of using a spring-based mechanism, the invention employs a bead that engages with recesses on the spray nozzle to provide positioning during rotation and switching operations. This extraction of the spring element eliminates the fatigue and breakage issues inherent in spring-based systems.
Solution Approach 2:
The patent replaces the durable but complex spring mechanism with a simpler, maintenance-free bead and recess structure. The bead acts as a simple positioning element that can be easily replaced if needed, while the recesses provide the positioning geometry. This approach trades the long service life of a spring for a simpler structure that eliminates fatigue failures.
2Reliability
If a spring and positioning bead structure is used, then positioning is achieved, but the structure complexity increases and maintenance costs rise
Solution Approach 1:
The patent combines the positioning bead and recesses into an integrated system where the bead on the spray nozzle directly engages with recesses on the body. This merging eliminates the need for separate spring components and complex positioning mechanisms, reducing overall structure complexity while maintaining reliable positioning functionality.
Solution Approach 2:
The spray nozzle itself serves multiple functions: it sprays water and simultaneously provides positioning through the bead that engages with recesses. The body also serves dual purposes by housing the water passage and providing the recesses for positioning. This multi-functionality reduces the need for separate dedicated positioning components, simplifying the overall structure.
3Manufacturing precision
If a spring-based positioning structure is used, then initial positioning is accurate, but maintenance inconvenience increases due to spring breakage
Solution Approach 1:
By removing the spring component entirely and replacing it with a bead-and-recess positioning system, the patent eliminates the maintenance issue of spring breakage. The bead is integrated into the spray nozzle and the recesses are molded into the body, creating a maintenance-free positioning system that preserves positioning precision without the repair inconvenience of spring-based systems.
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
The design ensures long service life, stable positioning, and reduced maintenance, with improved durability and user-friendly operation by using an elastic member that resists fatigue and simplifies assembly.
Implementation Method 1
The elastic legs are inserted in the accommodating groove. When the positioning head is pressed, the elastic legs are elastically deformed outward for the positioning head to be moved backward and disengaged from the corresponding recess.
Data Source
AI summary
A water spray gun having a spray nozzle positioning structure includes a gun body and a spray nozzle. The gun body has a water passage therein. The spray nozzle is rotatably connected to a front end of the gun body. A rear end face of the spray nozzle has a plurality of spaced recesses. A front end face of the gun body has an accommodating groove and an elastic member located in the accommodating groove. The elastic member includes a positioning head and at least two elastic legs. The positioning head is engaged in a corresponding one of the recesses when the spray nozzle is rotated. The elastic legs are inserted in the accommodating groove. When the positioning head is pressed, the elastic legs are elastically deformed outward for the positioning head to be moved backward and disengaged from the corresponding recess.