Rotatable Pannier Connector with Biasing Strap
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Solution Overview
Problem
Existing connection systems for securing bags to bicycle or motorcycle frames require multiple shim dimensions to accommodate varying rod geometries, leading to rattling issues due to play between clips and rods.
Innovation Solution
A connection system featuring rotatable connectors with a biasing mechanism, adjustable track mounting, and a carrying strap that rotates the connectors into a locking position, utilizing a shim with high friction coefficient to secure the rod-like member, and an abutment insert to prevent movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fastening clips are designed to enclose and accommodate the rod, then the connection is simplified, but various shim dimensions are required to ensure suitable connection to different rod geometries
Solution Approach 1:
The cam portion is designed with a universal geometry that can accommodate different rod diameters and shapes through rotational adjustment. The cam's curved surface profile allows it to adapt to various rod geometries without requiring different shim dimensions, making a single connector design suitable for multiple rod types.
Solution Approach 2:
The connector transitions from a static clip design to a dynamic cam mechanism that rotates to adjust its engagement geometry. This rotational movement allows the cam portion to dynamically adapt its contact surface orientation and position, enabling accommodation of different rod geometries through motion rather than requiring multiple fixed-dimensional shims.
2Ease of manufacture
If fastening clips are used to secure bags, then installation is simplified, but play between clips and rods causes rattling
Solution Approach 1:
The cam mechanism changes the engagement parameters by rotating to different positions, which alters the contact point and contact angle between the connector and rod. This parameter change allows the system to transition from a loose fit that causes rattling to a tight, stable engagement that eliminates play while maintaining ease of installation.
Solution Approach 2:
The traditional mechanical clip system that relies on friction and compression is replaced with a cam-based mechanical advantage system. The cam's rotational movement creates a leveraged locking action that provides more reliable and stable connection than simple clip compression, eliminating rattling while preserving installation simplicity.
3Ease of operation
If rotatable connectors with biasing mechanism are used, then easy installation is achieved, but the connector structure becomes more complex
Solution Approach 1:
The biasing mechanism and cam rotation feature are merged into a single integrated component rather than separate assemblies. The spring bias is built into the cam structure itself, allowing the connector to combine the functions of providing locking force and enabling rotational adjustment within one unified part, reducing overall structural complexity.
Solution Approach 2:
The biasing mechanism automatically provides the necessary locking force without requiring external adjustment or additional components. The spring-loaded cam self-regulates its engagement pressure and maintains stable connection, making the system self-adjusting and reducing the need for complex external control mechanisms.
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 system effectively secures bags to various rod geometries, minimizing rattling and play, while allowing easy installation and adjustment, ensuring a stable and secure attachment.
Implementation Method 1
a biasing member biasing the portions toward the locking position
Implementation Method 2
utilizing a shim with high friction coefficient to secure the rod-like member
Data Source
AI summary
A pannier comprises a container portion and a connection system. Two connectors each have a portion rotatable between an opened position to allow the connectors to be installed onto the rod-like member, and a locking position in which the portions lock the connectors to the rod-like member, and a biasing member biasing the portions toward the locking position. The portions of the connectors each rotate about an axis transverse with respect to the rod-like member. The portions of the connectors are oriented so as to rotate in opposite directions with respect to one another when concurrently rotating to the opened position and concurrently rotating to the locking position. A strap connected to said portions of both of the connectors, the strap being positioned with respect to the container portion in a grasping position such that a pulling action on the strap concurrently rotates said portions to the opened position.