Container Cap Thread Segmentation for Leakage Resistance
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Solution Overview
Problem
Existing container designs with pouring spouts and screw caps face challenges in securing the attachment during e-commerce handling, where upright position is not guaranteed and forces or impacts can cause leakage, while also being inconvenient due to the need for multiple turns to screw on and off.
Innovation Solution
The external thread of the pouring spout includes an additional segment of 135 to 225 degrees that serves as a support for the internal thread, enhancing security without increasing the number of turns required to reach the end position, and a stop edge defines the end position to prevent further rotation, along with a radial sealing element for improved sealing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the external thread has a larger number of windings to improve the hold and security of the attachment, then the reliability of the connection is improved, but the number of turns required to screw on and off the attachment increases, making it more difficult to operate
Solution Approach 1:
The external thread is segmented into two distinct parts: an effective thread area that forms the undercut for the internal thread, and an additional segment that provides support without extending the screwing path. This segmentation allows the thread to provide both security and ease of operation by separating the functions of engagement and support.
Solution Approach 2:
The additional segment extends in the circumferential direction beyond the effective thread area, providing support in a dimensional extension that does not translate to increased rotational travel. This allows the attachment to be supported over a larger angular range without requiring additional turns to engage.
2Reliability
If the external thread is extended to provide better support for the internal thread, then the reliability of the connection under tilting forces and impacts is improved, but the length of the screwing process increases
Solution Approach 1:
The external thread is divided into an effective thread area and an additional segment. The additional segment provides extended support for the internal thread without requiring the screwing process to continue beyond the effective thread area, thus maintaining quick engagement while improving reliability.
Solution Approach 2:
The additional segment provides more support than the minimum required for basic engagement, enhancing the connection's ability to withstand tilting forces and impacts. However, this excessive support is provided in a way that does not extend the screwing process beyond what is necessary for engagement.
3Strength
If the effective thread area is increased to improve the undercut for the internal thread, then the strength of the connection is improved, but the number of revolutions required to reach the end position increases
Solution Approach 1:
The external thread is segmented into an effective thread area that provides the undercut for the internal thread and an additional segment that provides support. This segmentation ensures that the effective thread area is optimized for strength without requiring an excessive number of revolutions, as the additional segment provides the extra support needed.
Solution Approach 2:
The additional segment is positioned specifically to provide support for the internal thread without extending the effective thread area that forms the undercut. This local addition of support quality allows the connection to be stronger without requiring more revolutions to engage.
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
The invention relates to a container (1) which comprises a cylindrical pouring nozzle (30) with at least one external thread turn (31) and a cap (10), which can be screwed onto the pouring nozzle (30), with at least one internal thread turn (21). With the cap (10) in a screwed-on end position, the external thread turn (31) of the pouring nozzle (30) constitutes, over an effective thread region, an undercut for the internal thread turn (21) of the cap (10). The invention is distinguished in that the external thread turn (31) of the pouring nozzle (30) comprises an additional segment (35) having a segment length which is at least 90 degrees in the circumferential direction and wherein a total length of the thread turn (31) of the pouring nozzle (30) is greater than a length of the effective thread region.