Hidden Rotary Bag Closure With Contoured Pin and Knob Return
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Solution Overview
Problem
Conventional closure devices for bags and clothing are aesthetically unattractive due to visible rotating parts, negatively impacting the overall appearance.
Innovation Solution
A closure device with a rotatable part that integrates with the appearance of the bag or item of clothing, featuring a contoured pin and a control knob with magnetic and elastic return mechanisms for seamless operation and integration with the bag's design, allowing the pin to be hidden when closed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional closure device with a visible rotatable pin is used, then the closure function is achieved, but the aesthetic appearance of the bag is degraded
Solution Approach 1:
The rotatable end portion of the contoured pin is nested within a contoured cavity in the movable part. When the closure device is engaged, the pin extends through the bag material and the rotatable portion is concealed within the cavity, making it invisible from the exterior. This nesting principle allows the functional rotating mechanism to be hidden while maintaining aesthetic appearance.
Solution Approach 2:
The rotatable end portion is extracted from the visible exterior and relocated to the interior of the movable part. By removing the rotating mechanism from the external view and placing it within the contoured cavity, the invention separates the functional element from the aesthetic surface, resolving the contradiction between functionality and appearance.
2Shape
If the rotatable end portion is concealed within the contoured cavity, then the aesthetic appearance is improved, but the ease of operation may be compromised
Solution Approach 1:
The contoured cavity is pre-configured with specific geometric features that guide the user's fingers during operation. The cavity's shape provides natural grip zones and rotational guidance, so that the preliminary design of the cavity structure prepares the user for easy manipulation without requiring complex controls or exposing mechanical components.
Solution Approach 2:
The contoured pin and cavity are designed to be self-operating through natural finger manipulation. The geometry of the pin and cavity works together to provide tactile feedback and automatic engagement/disengagement without requiring additional mechanisms, buttons, or exposed controls. The system serves itself through its own geometric design, maintaining aesthetics while ensuring ease of use.
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
The device provides reliable and efficient closure while maintaining a seamless appearance, enhancing the aesthetic appeal of bags and clothing.
Implementation Method 1
a) a control knob (9) which is associated rotatably with the movable part (2) about a second rotation axis (10)... and elastic return means (39) for returning the rotatable end portion (7a) to the release position
Implementation Method 2
control knob (9) which is associated rotatably with the movable part (2)... and magnetic return mechanisms
Data Source
Figure 1
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AI summary
A closure device (1, 1'), particularly for bags and items of clothing in general, comprising a movable part (2, 2') and a fixed part (3, 3') which are associable with, respectively, a first flap (4, 4') and a second flap (5, 5') of a bag or item of clothing in general to be closed as a result of their overlap; the movable part (2, 2') has a contoured cavity (6, 6') of the through type and a contoured pin, which is engageable in the contoured cavity (6, 6'), protrudes from the fixed part (3, 3'); the contoured pin (7, 7') comprises an end portion (7a, 7a') which is rotatable about a first rotation axis (8, 8') with respect to the remaining portion (7b, 7b') of the contoured pin (7, 7') so that it can be fastened to the movable part (2, 2'); and further comprising a control knob (9, 9'), which is associated rotatably with the movable part (2, 2') and acts on the end portion (7a, 7a') of the contoured pin (7, 7').