Adjustable Nozzle Tip for Paint Sprayer with Rotating Guard
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Solution Overview
Problem
The existing paint sprayer nozzle adjustment mechanism tends to loosen the spray nozzle from the reservoir during rotation, disrupting the threaded connection and affecting the spray pattern.
Innovation Solution
An adjustable nozzle tip system featuring a guard member that can be rotated without disturbing the threaded connection, allowing for the collar member to be securely engaged and rotated over the channel member, maintaining the connection while adjusting the spray pattern.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the spray nozzle is rotated to adjust the spray pattern, then the spray pattern can be adjusted, but the threaded connection between the spray nozzle and reservoir becomes loosened
Solution Approach 1:
The assembly is divided into separate functional components: the spray nozzle (62) with its threading, the collar member (102) with its threading, and the guard member (130) as a separate rotational interface. This segmentation allows the spray nozzle to remain securely threaded while the guard member provides the rotational adjustment function without transmitting loosening forces back to the threaded connection.
Solution Approach 2:
The guard member (130) acts as an intermediary between the user's rotational input and the spray nozzle assembly. It engages with the collar member (102) to provide rotational adjustment of the spray pattern while preventing direct rotational disturbance to the threaded connection between the spray nozzle (62) and reservoir, thus mediating between adjustment need and connection security.
2Adaptability or versatility
If the spray nozzle is rotated to change spray pattern, then spray pattern adjustment is achieved, but the connection between spray nozzle and reservoir becomes disturbed
Solution Approach 1:
The system provides dynamic adjustability through the rotatable guard member (130) that can be rotated relative to the collar member (102) to change spray pattern orientation, while the threaded connections remain statically secure. The guard member's rotation is constrained to not disturb the threaded portions, creating a dynamic adjustment mechanism that preserves connection stability.
Solution Approach 2:
The rotational adjustment function is extracted from the spray nozzle assembly itself and placed into a separate guard member (130) that interfaces with the collar member (102). This extraction allows spray pattern adjustment without transmitting rotational disturbance to the threaded connection between the spray nozzle (62) and reservoir, separating the adjustment function from the connection function.
Data Source
AI summary
A sprayer that dispenses paint stored in a reservoir body generally includes a housing and a channel member having an outer periphery with a threaded portion and an inner periphery defining an aperture. The channel member extends from the housing. A spray nozzle is connected to the inner periphery in the channel member. A collar member has an inner periphery with a threaded portion that is operable to engage to the threaded portion on the outer periphery of the channel member. A guard member is rotatably engaged with the spray nozzle and movable between an extended condition and a retracted condition. The guard member in the retracted condition is engaged for rotation with the collar member and is operable rotate the threaded portion of the collar member over the threaded portion of the channel member. The guard member in the extended condition is rotatable relative to the collar member.