Liquid Dispenser Protective Unit and Operating Handle Mechanism
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Solution Overview
Problem
Liquid dispensers, especially those used for nicotine or cannabis products, require comfortable operation while preventing accidental actuations and ensuring safety from small children, as they often unintentionally release liquids or are easily operable by children.
Innovation Solution
A portable liquid dispenser design featuring a liquid reservoir, applicator, and conveying device with a protective unit and operating handle that requires a specific sequence of movements to transition from a protective to a use position, incorporating a blocking device to prevent unintended activation, and a nozzle unit for atomized discharge.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the liquid dispenser is designed to be easily operable for comfortable use, then ease of operation is improved, but accidental actuations and child operation become more likely
Solution Approach 1:
The operating mechanism is divided into two separate functional components: a protective unit that must be moved to expose the applicator, and an operating handle that actuates the conveying device. This segmentation ensures that comfortable operation is achieved through intuitive separate actions, while accidental actuations are prevented by requiring the deliberate sequence of first protecting the applicator, then operating it.
Solution Approach 2:
The protective unit is positioned to cover and protect the liquid applicator in the default state. Before the dispenser can be used, the user must deliberately perform the preliminary action of moving the protective unit to the side to expose the applicator. This preliminary protective action prevents accidental exposure and subsequent accidental actuation by children or unintended users.
2Reliability
If a protective cover is added to prevent accidental actuations, then safety is improved, but device complexity increases
Solution Approach 1:
The protective unit and operating handle are merged into a single integrated assembly that works together as one functional system. The protective unit is moved by the operating handle, and both functions are accomplished through a single deliberate hand movement sequence. This merging reduces device complexity compared to having separate independent protective mechanisms, while still providing effective protection against accidental actuations.
3Ease of operation
If the applicator is always exposed for easy access, then ease of operation is improved, but accidental releases and child access become more likely
Solution Approach 1:
The applicator transitions from a static covered state to a dynamic exposed state only when the user deliberately performs the protective unit movement action. The applicator is dynamically protected by the protective unit during storage and transport, and only dynamically exposed when the user intentionally activates the operating handle. This dynamic behavior ensures easy access for intended users while preventing child operation.
Data Source
AI summary
A liquid dispenser having a liquid reservoir, a liquid applicator and a conveying device for conveying liquid from the liquid reservoir) to the liquid applicator. The liquid dispenser has an applicator unit, on which the liquid applicator is provided, and a protective unit having a protective cover for protecting the applicator unit. The protective unit and the applicator unit can be displaced with respect to one another between a protective position and a use position. The liquid dispenser has an operating handle, via which operating handle the protective unit can be displaced from the protective position into the use position with respect to the applicator unit, and by which, in the use position, the conveying device can be actuated and liquid can be conveyed from the liquid reservoir to the liquid applicator.