Rotatable Spray Lance for Compact Hand-Held Sprayer Storage
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Solution Overview
Problem
Hand-held sprayers with long spray lances are inconvenient for storage and transportation due to their large size, and the detachable connection between the lance and sprayer often results in residual liquid leakage during assembly and disassembly.
Innovation Solution
A hand-held battery-operated sprayer with a rotatable spray lance that uses a rotary axle base and rotating shaft to allow 180° rotation of the lance, eliminating the need for disassembly and providing a compact storage form, while maintaining a threaded connection to prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a relatively long spray lance is used to keep the nozzle away from the human body and close to the target object, then safety during spraying is improved, but the product size becomes excessively large and storage and transportation become inconvenient
Solution Approach 1:
The spray lance is made rotatable through a rotary axle base mechanism, allowing it to dynamically change its position and orientation. During operation, the lance can be extended to a long position for safe spraying, while during storage it can be rotated to a compact position, transforming the system from a static long structure to a dynamic adjustable one that resolves the contradiction between safety distance and storage compactness
Solution Approach 2:
The rotary axle base enables the spray lance to move from a linear extension along the longitudinal axis into a different spatial dimension by rotating it sideways or upward. This dimensional change allows the lance to achieve both long operational reach and compact storage configuration by utilizing three-dimensional space rather than just linear extension
2Reliability
If a threaded connection manner is used between the spray lance and the sprayer, then the connection is secure, but residual liquid leaks during assembly and disassembly and the user feels inconvenient
Solution Approach 1:
The connection system is segmented into a quick-release coupling mechanism with separate locking and unlocking components. The coupling includes a male connector on the lance and a female connector on the sprayer body, with a release lever that can be operated by hand to quickly lock or unlock the connection, eliminating the need for threaded rotation while maintaining secure connection during operation
Solution Approach 2:
The quick-release coupling mechanism is pre-designed with alignment features and self-locking characteristics that automatically engage when the lance is inserted into the sprayer body. The connection is preliminarily prepared with guide surfaces and positioning elements that ensure proper alignment and secure attachment without requiring manual threading or tightening actions
3Ease of operation
If the spray lance is made rotatable to enable compact storage, then storage convenience is improved, but the structural complexity increases
Solution Approach 1:
The rotary axle base mechanism is nested within the existing sprayer body structure, with the rotation axis integrated into the housing and the spray lance passing through the rotary mechanism. The limiting blocks and positioning blocks are nested within the rotary axle base, creating a compact integrated assembly that adds rotational functionality without significantly increasing overall structural complexity
Data Source
AI summary
A hand-held battery operated sprayer with a rotatable spray lance includes a spray lance assembly and a spray chamber. A motor, a pump, a shutoff valve, a suction hose assembly, a pump inlet hose, a pump outlet hose, a battery pack, and a conductor are disposed in the spray chamber. Water sequentially passes the suction hose assembly, the shutoff valve, the pump inlet hose, the pump, and the pump outlet hose, and flows out of the spray chamber. A rotary axle base is disposed at the front end of the spray chamber. A right-angled rotating shaft is movably connected in the rotary axle base. The rotating shaft is connected to the spray lance assembly. The pump outlet hose can reach a nozzle of the spray lance assembly through the rotating shaft.