Bag Belt Mechanism for Shoulder Stability
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Solution Overview
Problem
Existing shoulder-slingable bags with handles often experience low usability due to handle instability and the inability to easily switch between carrying the bag over either shoulder, leading to potential handle loss and uneven distribution of load, which can cause the bag to swing and twist.
Innovation Solution
A bag design featuring a detachable and adjustable belt member with a coupling mechanism that allows the bag to be turned relative to the belt member, ensuring stability and allowing the user to easily switch between carrying the bag over either shoulder, with a second coupling mechanism for adjusting the belt member's position, and gusset parts for housing the belt member when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a belt member is coupled to the handle to prevent handle fall-off, then handle stability is improved, but device complexity increases
Solution Approach 1:
A belt member is introduced as an intermediary element between the handle and the bag body. The belt member includes a first coupling part connected to the handle and a second coupling part connected to the bag body, acting as a mediator that prevents handle fall-off while maintaining structural simplicity through detachable connections.
2Reliability
If the belt member is fixed to the bag body, then handle stability is improved, but adaptability decreases
Solution Approach 1:
The coupling mechanism between the belt member and the bag body is designed to be detachable rather than fixed. This dynamic connection allows the belt member to be attached or detached based on usage needs, providing both stability when attached and flexibility when detached, thus resolving the contradiction between reliability and adaptability.
3Manufacturing precision
If the bag is designed for a specific shoulder orientation, then manufacturing precision is improved, but versatility decreases
Solution Approach 1:
The coupling part is designed with universal functionality to accommodate different shoulder orientations. The detachable coupling mechanism allows the bag to be worn on either the left or right shoulder, enabling the same design surface to be displayed regardless of which shoulder is used, thus achieving both manufacturing precision for a specific design orientation and versatility for different carrying configurations.
4Ease of operation
If the coupling mechanism is made detachable, then ease of operation is improved, but reliability decreases
Solution Approach 1:
The coupling mechanism is designed to be detachable for ease of operation, allowing users to adjust or remove the belt member as needed. The detachable design includes coupling parts that can be easily connected and disconnected, providing operational convenience while maintaining sufficient connection stability during use through proper coupling design.
5Adaptability or versatility
If the belt member is made stretchable, then adaptability is improved, but manufacturing precision decreases
Solution Approach 1:
The belt member is designed with stretchable properties to accommodate different body sizes and shapes. By changing the physical parameter of the belt material to be elastic, the system adapts to various users without requiring precise manufacturing for each individual size, thus trading manufacturing precision for improved adaptability and user comfort.
Data Source
Figure 1(a)~1(b)
Figure 2
Figure 3(a)~3(b)
AI summary
A bag 1 of the present invention includes: a bag main body 2; a shoulder-slingable first handle 3 and a shoulder-slingable second handle 4 attached to the bag main body 2; and a belt member 5 that connects the first handle 3 and a bottom of the bag main body 2. In a case where the first handle 3 and the second handle 4 are slung over a shoulder of a user H and where the bag main body 2 is located on a back side of the user H, the belt member 5 draws the first handle 3 and the bottom of the bag main body 2 toward each other on a chest side of the user H, to thereby maintain a state where part of the bag main body 2 is in contact with the back of the user H. The bag 1 further includes a coupled body 6 and an another-end-side carabiner 55 that movably couple the belt member 5 to the bottom of the bag main body 2.