Drinking bottle closure, in particular for an insulated bottle
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Solution Overview
Problem
Drinking bottle closures with eccentric lever elements face issues with pressure equalization and liquid leakage when opened, especially when the bottle is in a lying position, as existing designs fail to prevent liquid from shooting out through ventilation paths.
Innovation Solution
A drinking bottle cap with a central air duct and a surge protection element that surrounds the air duct, featuring a tunnel structure to allow air flow while preventing liquid from entering the airways, combined with a sealing lip and inner sealing element for mechanical shielding to prevent liquid from escaping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the closure is opened quickly to equalize pressure, then pressure equalization is achieved, but liquid shoots out through the air duct
Solution Approach 1:
The air duct is segmented into multiple pathways: a central air duct for pressure equalization and peripheral ventilation paths surrounded by the surge protection element. This segmentation allows air to flow through the central duct while liquid is blocked by the surge protection element, resolving the contradiction between pressure equalization and liquid containment.
Solution Approach 2:
The surge protection element acts as an intermediary structure between the outlet space and the air duct. It includes a shielding surface that extends into the outlet space, creating a barrier that intercepts liquid particles accelerated during pressure equalization and redirects them away from the air duct, while permitting air flow.
2Reliability
If the sealing plate is pressed against the sealing seat with high contact pressure, then reliable closure is achieved, but liquid leakage prevention is compromised when pressure builds up
Solution Approach 1:
The sealing plate is designed to be movable rather than fixed, allowing it to dynamically respond to pressure changes. When overpressure occurs, the sealing plate can move away from the sealing seat, creating an overflow path that prevents liquid leakage while maintaining reliable closure under normal conditions. This dynamic behavior resolves the contradiction between closure reliability and liquid leakage prevention.
3Ease of operation
If the air duct is kept open for ventilation during drinking, then liquid flows out evenly, but liquid can enter the air duct when the bottle is in lying position
Solution Approach 1:
The surge protection element creates a localized protective zone around the air duct opening. The shielding surface is positioned to specifically protect the air duct entrance from liquid contamination in the outlet space, while the rest of the air duct remains open for ventilation. This local quality approach allows ventilation to continue while preventing liquid contamination.
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
Ensures pressure equalization while preventing liquid from spraying out during opening, maintaining a mechanical seal and allowing air flow, effectively preventing liquid from entering the air duct and ensuring safe opening even under overpressure conditions.
Implementation Method 1
the axis of the sealing element is also mounted so that it can move axially
Implementation Method 2
The surge protection element prevents liquid from being entrained into the airways when the container is opened
Implementation Method 3
In the event of overpressure in the interior, the sealing lip is pressed more strongly against the edge of the air duct and seals it off
Implementation Method 4
the surge protection element is divided into two parallel walls, which form a tunnel between them, ie a path through which air can flow
Data Source
Figure 1
Figure 2a
Figure 2b
AI summary
The invention relates to a drinking bottle closure (100) for an insulated bottle comprising: a housing (10), which is to be connected to a bottle neck, comprises an outlet chamber wall (12) surrounding an outlet chamber (13), and has a cover (10.1), which has at least one pouring opening (10.5) and delimits the outlet chamber (19) at the top; a lever element (20), which, in a closed position, closes the pouring opening (10.5) and is pivotably disposed on the housing (10); an intermediate element (30), which is interlockingly coupled to the lever element (20) and is axially movably contained in an air passage located in the center of the housing (10) and delimited by an air passage wall (14); a sealing element (40), which comprises a sealing plate (41) that is connected to the intermediate element (30) and, in the closed position, rests against the outlet chamber wall (12); and the air passage wall (14) is surrounded by a splash guard element (50), which is disposed inside the outlet chamber (19) and continues in a tunnel (51), which is located in an area opposite the pouring opening (10.5) and extends as far as the outlet chamber wall (12). On its upper side, the sealing plate (40) comprises at least one shoulder (43) which, in a closed position, engages in or covers the splash guard element (50).