Ring Binder Travel Bar Mechanism for One-Handed Operation
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Solution Overview
Problem
Conventional ring binders require both hands to open and close, leading to uneven strength distribution, potential damage, and inconvenience when handling large numbers of leaflets, resulting in increased costs and user discomfort.
Innovation Solution
A ring binder mechanism featuring a housing with pivotable hinge boards and a travel bar that allows for one-handed operation through an inclined opening and closing mechanism, utilizing a recoil spring and push rod to pivot the hinge boards, enabling easy opening and closing with minimal effort.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional ring binders are opened or closed by using both hands to open the two semi-rings, then the binder can be securely closed, but it requires certain strength of the hands and causes uncomfortable feel
Solution Approach 1:
A travel bar with inclined surfaces acts as an intermediary mechanism between the user's manual input and the hinge boards. The inclined opening surface and inclined closing surface of the travel bar translate linear motion into rotational motion of the hinge boards, providing mechanical advantage and reducing the direct force required from the user's hands.
Solution Approach 2:
The hinge boards are designed to pivot dynamically between open and closed positions. The travel bar's inclined surfaces guide this dynamic movement, allowing the hinge boards to rotate smoothly and reducing the static force needed to maintain the closed position.
2Reliability
If conventional ring binders are opened or closed by using both hands, then the semi-rings can be engaged, but uneven strength between the hands is likely to damage the ring binder
Solution Approach 1:
The travel bar serves as a mediator that equalizes the force distribution. By providing inclined surfaces that convert linear pressure into synchronized rotational movement of both hinge boards, it ensures even engagement of the semi-rings regardless of differences in hand strength between the user's hands.
3Ease of operation
If conventional ring binders are opened or closed by both hands, then the binder can be operated, but it is very inconvenient when there are a large number of leaflets within the semi-rings
Solution Approach 1:
The travel bar with its inclined surfaces acts as a force amplifier and motion converter. When the user presses the push member, the travel bar translates this single-point input into synchronized movement of both hinge boards simultaneously, making it easy to open or close even when numerous leaflets are present in the binder.
4Ease of operation
If a travel bar with inclined surfaces is used to pivot hinge boards, then one-handed operation is enabled, but the device complexity increases
Solution Approach 1:
The travel bar performs multiple functions: it acts as a lever, a guide, and a force transmitter. The inclined opening surface and inclined closing surface are integrated into a single component that interacts with both hinge boards simultaneously, enabling one-handed operation without requiring separate mechanisms for each hinge board.
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 allows for effortless one-handed operation, reducing the risk of damage and cost, while providing a comfortable and convenient way to manage large quantities of leaflets.
Implementation Method 1
utilizing a recoil spring and push rod to pivot the hinge boards
Implementation Method 2
The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position or the inclined closing surface of the top bar contacts the closing edge of the slot to pivot the first and second hinge boards to the closed position
Data Source
AI summary
A ring binder mechanism that includes a housing, first and second hinge boards positioned in the housing that cooperate to define a slot having a closing edge and an opening edge. The hinge boards are pivotable between open and closed positions. A plurality of pairs of semi-rings include first and second ring members mounted on the first and second hinge boards, respectively. A travel bar is positioned below the hinge boards and moveable with respect to the housing and the hinge boards between an open position and a closed position. The travel bar includes at least one top bar extending from a top surface thereof that includes inclined opening and closing surfaces. The top bar extends through the slot in the hinge boards and is biased toward the open position. The inclined opening surface of the top bar contacts the opening edge of the slot to pivot the first and second hinge boards to the open position.