Multi-Function Pull-Out Spray Head Using End-Face Core Pulling
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Solution Overview
Problem
Conventional multi-function pull-out spray heads suffer from water leakage and low yield due to the need for sealing plates on core-pulling openings, complicating maintenance and reducing product reliability.
Innovation Solution
A multi-function pull-out spray head design featuring a housing with a switching assembly and water discharge assembly, utilizing core-pulling technology for communicating flow passages and detachable inner bodies, sealed by O-shaped rings and rubber pads, to prevent water leakage and facilitate easy maintenance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sealing plates are welded on core-pulling openings to prevent water leakage, then water tightness is improved, but device complexity and maintenance difficulty increase
Solution Approach 1:
The patent removes the sealing plate component entirely by repositioning the core-pulling opening to the end face of the inner body instead of the side face. This extraction of the problematic sealing plate eliminates the need for welding operations and simplifies the overall structure while maintaining water tightness through the natural geometry of the core-pulling hole alignment.
Solution Approach 2:
Instead of creating openings on the side face of the inner body (conventional approach), the patent inverts the approach by forming core-pulling openings on the end face. This directional inversion eliminates the need for sealing plates and simplifies the manufacturing process while achieving the same functional outcome of water-tight flow passages.
2Reliability
If sealing plates are welded on core-pulling openings to prevent water leakage, then water tightness is improved, but ease of repair deteriorates
Solution Approach 1:
By removing the sealing plate component through redesign, the patent enables direct access to core-pulling openings for maintenance purposes. The simplified structure allows technicians to inspect and repair internal components without removing welded sealing plates, significantly improving ease of repair while maintaining water tightness through the redesigned opening configuration.
3Ease of manufacture
If side core-pulling technology is used to form communicating flow passages, then manufacturing capability is improved, but water leakage occurs due to sealing plate requirements
Solution Approach 1:
The patent transitions from side-face core-pulling (two-dimensional surface operation) to end-face core-pulling (one-dimensional linear operation). This dimensional change in the core-pulling process allows the forming of water-tight flow passages without requiring sealing plates, thereby maintaining manufacturing capability while eliminating water leakage issues.
4Ease of repair
If detachable inner bodies are used to facilitate maintenance, then ease of repair is improved, but device complexity increases
Solution Approach 1:
The patent divides the spray head into separable modules: the inner body can be detached from the outer housing for maintenance. This segmentation allows easy access to internal components for repair while keeping the overall structure simple through standardized connection interfaces, thereby improving ease of repair without significantly increasing device complexity.
Data Source
AI summary
A multi-function pull-out spray head includes a housing, a switching assembly, and a water discharge assembly. The water discharge assembly forms at least three water outlet areas. The switching assembly includes a first inner body, a second inner body, a first switching control unit, and at least two second switching control units. The first inner body has a communicating flow passage made by core-pulling technology in a direction parallel to a water flowing direction. The multi-function pull-out spray head is not easy to leak water and has the characteristics of high yield.