Ring Binder Mechanism Automatic Locking via Deformable Lever
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ring binder mechanisms do not positively lock closed ring members together, leading to unintentional opening if accidentally dropped, and require manual operation to engage locking structures, which can be cumbersome and prone to errors.
Innovation Solution
A ring binder mechanism with a flexible actuator and locking system that automatically locks the ring members in a closed position using a lever and travel bar, eliminating the need for additional biasing components and manual locking, ensuring secure closure without unintentional opening.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual locking operation is used, then locking reliability is improved, but ease of operation deteriorates
Solution Approach 1:
The locking system is designed to automatically engage when the ring members are closed, eliminating the need for manual locking operation. The actuator moves the locking structure into position to block the hinge plates from pivoting, and the system self-locks without requiring additional manual intervention, thus improving ease of operation while maintaining locking reliability.
Solution Approach 2:
The locking structure is positioned in advance to block the hinge plates from pivoting before any accidental drop or unintended opening can occur. The actuator pre-positions the locking elements so that when the ring members close, the locking engagement is already prepared, ensuring reliable locking without requiring reactive manual operation.
2Reliability
If strong spring force is used to clamp ring members, then reliability of closed position is improved, but ease of operation deteriorates
Solution Approach 1:
The strong spring force required for clamping is extracted from the system by replacing it with a locking structure that uses blocking elements to prevent hinge plate pivoting. The locking elements engage with the hinge plates to maintain the closed position, eliminating the need for strong spring force and thereby reducing the operator force required to open and close the ring members.
Solution Approach 2:
The locking structure acts as an intermediary between the hinge plates and the housing, providing a mechanical blocking mechanism that replaces the spring force function. The locking elements transfer the load from the spring to the blocking structure, allowing the spring force to be reduced while maintaining reliable closure.
3Reliability
If locking structure is added, then reliability of closed position is improved, but device complexity increases
Solution Approach 1:
The actuator serves multiple functions: it moves the control slide to position the locking structure, it directly moves the locking elements into blocking position, and it maintains the locked position during ring member closure. By consolidating these functions into a single actuator mechanism, the patent adds locking capability while minimizing the increase in device complexity.
Solution Approach 2:
The locking structure is merged with the existing actuator and control slide mechanism. The locking elements are integrated into the travel bar that is already part of the actuator assembly, combining the locking function with the existing motion transmission system rather than adding completely separate locking components.
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 mechanism securely retains loose-leaf pages by automatically locking the ring members in a closed position, preventing unintentional opening and reducing operator effort, while eliminating the need for additional springs or manual locking operations.
Implementation Method 1
The actuation system is adapted to deform upon movement of the actuator from the second position to the first position to delay the movement of the locking system from the pivoting motion of the hinge plates.
Data Source
AI summary
A ring mechanism for retaining loose-leaf pages comprises a housing, hinge plates, and ring members mounted on the hinge plates for retaining pages on the mechanism. An actuating lever is pivotally mounted on the housing for engaging the hinge plates and pivoting them to selectively move the ring members between an open position and a closed position. A travel bar is operatively connected to the lever for selective movement between a position in which locking elements of the travel bar block the pivoting movement of the hinge plates and a position in which the travel bar allows the hinge plates to pivot. The lever is configured to deform when pivoting the hinge plates to close the ring members to delay movement of the travel bar and locking elements to the blocking position from the onset of pivoting motion of the hinge plates.