Motorcycle Case Cam Snap Closure Mechanism
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Solution Overview
Problem
Existing motorcycle case opening and closing devices are complex and bulky due to their connecting rod mechanisms, which compromise the compactness and aesthetics of the case.
Innovation Solution
A snap closure mechanism utilizing a foldable handle with a cam system that integrates connecting rods at the hinge, allowing for a simple and space-efficient operation with a cam and lever system, including elastic means for automatic lid release and handle unfolding, and stopping mechanisms to prevent sudden movements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a connecting rod mechanism is used for snap closure, then reliable lid locking is achieved, but device complexity and size increase
Solution Approach 1:
The patent extracts the essential function of the connecting rod mechanism (providing snap closure) and eliminates the complex connecting rod components. Instead, it uses a simplified cam mechanism directly integrated into the handle assembly, removing unnecessary intermediate linkages while maintaining the snap closure function.
Solution Approach 2:
The handle assembly is designed to perform multiple functions: it serves as both the carrying handle and the actuation mechanism for the cam system. The cam mechanism itself is integrated into the handle structure, making the handle a multi-functional component that combines structural support with the locking mechanism.
2Reliability
If a connecting rod mechanism is used for snap closure, then reliable lid locking is achieved, but the case appearance and compactness deteriorate
Solution Approach 1:
The patent merges the cam mechanism with the handle assembly, combining two separate components into a single integrated unit. This integration eliminates the need for separate connecting rods and other intermediate components, resulting in a more compact and aesthetically pleasing appearance while maintaining the reliable snap closure function.
3Volume of moving object
If a cam mechanism with foldable handle is used, then device compactness is improved, but ease of operation may be compromised
Solution Approach 1:
The handle is designed to be foldable, transitioning between a folded position for compact storage and an extended position for operation. The cam mechanism is designed to rotate through a specific angular range, converting the rotational motion of the handle into the linear motion needed for lid closure. This dynamic design maintains compactness when not in use while providing full operational capability when needed.
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 solution provides a compact, easy-to-use snap closure system that ensures secure lid engagement with minimal manual effort, automatic handle unfolding, and secure locking, enhancing the case's compactness and user experience.
Implementation Method 1
said at least one cam comprising a cylindrical body longitudinal to said hinge axis and placed eccentrically with respect to said axis
Implementation Method 2
elastic means for automatic lid release and handle unfolding
Data Source
Figure 1~2
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AI summary
Opening and closing device (4) for motorcycle cases comprising at least a cam (10) at a handle (8), said cam (10) being linked to a closing element (5) and is placed at the hinge axis (9) of the handle (8) to the base (2) of the case (1), so that the movement of the handle (8) between a folded position and an unfolded position rotates said at least one cam (10), which also moves said closing element (5) between a first position and a second position.