Travel Bag Frame With Adjustable Wheel Axis
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Solution Overview
Problem
Conventional travel bags experience instability and limited steerability when moved on uneven ground, especially in inclined positions, leading to potential falls and increased user strain due to unbalanced moments and restricted wheel rotation.
Innovation Solution
A travel bag design featuring a frame with at least three wheels that remain in contact with the ground and are rotatable 360 degrees, along with a pivot axis and angle maintaining unit, allowing the bag to be inclined at various angles while maintaining continuous ground contact, enhancing mobility and reducing user strain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the travel bag is moved in an inclined status to reduce falling risk, then stability is improved, but steerability deteriorates because wheels cannot freely rotate
Solution Approach 1:
The patent applies the dynamics principle by making the wheel rotation axis adjustable rather than fixed. The wheel rotation axis changing unit allows the rotation axis of the wheels to be dynamically changed between a first position (perpendicular to the case bottom surface) and a second position (perpendicular to the ground). This enables the wheel rotation characteristics to adapt to different operating conditions - providing stable support in inclined positions while maintaining steerability when needed.
2Reliability
If the travel bag is moved in an inclined status on uneven ground, then falling risk is reduced, but wheel rotation is restricted due to friction
Solution Approach 1:
The patent implements dynamics by enabling the wheel rotation axis to change position based on operating conditions. When moving on uneven ground or in inclined status, the rotation axis can be adjusted to remain perpendicular to the ground rather than the case bottom surface, allowing wheels to continue rotating freely despite the inclined orientation of the bag body.
Solution Approach 2:
The patent applies parameter changes by modifying the orientation of the wheel rotation axis. The wheel rotation axis changing unit changes the rotational parameters of the wheels from being fixed relative to the case bottom surface to being adjustable relative to the ground, enabling the wheels to adapt their rotation characteristics to match the ground surface orientation rather than the bag orientation.
3Ease of operation
If the handle is positioned at the uppermost position for user convenience, then ease of operation is improved, but the travel bag shakes and may fall due to unbalanced moment
Solution Approach 1:
The patent applies dynamics by making the wheel rotation axis adjustable rather than fixed. When the travel bag is in an inclined status with the handle positioned for user convenience, the wheel rotation axis can be changed to remain perpendicular to the ground, allowing the wheels to rotate smoothly and reducing the shaking and falling risk caused by unbalanced moments.
Data Source
AI summary
A travel bag is provided. The travel bag comprising: a frame having at least three wheels attached thereto, each of the wheels being configured to be contact to a ground; a case being configured to have an empty space to receive objects and also being configured to be disposed on the frame; and a pivot axis being located on or above the frame, the pivot axis being defined by two contact points or a contact line connecting the case and the frame. The case disposed on the frame is allowed to pivot on the pivot axis to draw a trajectory of an arc or a circle. All of the wheels are configured to be maintained as being continuously contact to the ground, regardless of the case's pivoting around the pivot axis.