Rotary Bracket Mechanism for Perforated Sheet Handling
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Solution Overview
Problem
Existing devices for receiving perforated sheets face issues with reliable and precise opening and closing of holding brackets, especially when dealing with varying spring forces, which can limit the flexibility of inserting and removing sheets.
Innovation Solution
A device featuring a base plate with openable and closable retaining brackets connected via a bracket web that rotates about an axis, a pivoting lever guided by a connecting link, and a carriage that controls the movement of the lever to determine the opening and closing of the brackets, ensuring precise control over the angle and movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If spring-loaded pins are used to open the folding bracket, then the bracket can be opened automatically, but the opening is not reliable and intermediate positions are difficult to adjust
Solution Approach 1:
The patent replaces the spring-loaded pin mechanism with a carriage-based mechanical system. The carriage, when displaced, directly drives the folding bracket through a connecting link and pivoting lever, eliminating the need for springs and providing reliable, controlled opening and closing movements with adjustable intermediate positions.
Solution Approach 2:
The patent enables adjustment of the folding bracket's opening angle by modifying the carriage displacement distance. This parameter change allows flexible control over the bracket's position, enabling intermediate positions for sheet removal while maintaining reliable closed positions for sheet storage.
2Reliability
If high spring force is used to move sheets during opening, then sheets can be moved reliably, but intermediate positions become difficult to adjust
Solution Approach 1:
The patent transforms the static spring force system into a dynamic carriage-driven system. The carriage can be displaced to any position, providing dynamic control over the folding bracket's opening angle and the force applied to move sheets, thus enabling both reliable sheet movement and flexible adjustment of intermediate positions.
3Ease of operation
If manual assistance is required to open the folding bracket, then intermediate positions can be adjusted, but the operation becomes complex and time-consuming
Solution Approach 1:
The patent enables the folding bracket to open and close automatically through the carriage mechanism. When the carriage is displaced, it self-drivenly actuates the pivoting lever and connecting link, which in turn open or close the folding bracket without requiring manual assistance, thus reducing operation time while maintaining adjustability.
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a device for accommodating punched sheets, in particular loose sheets of paper, and a folder, in particular a binder, having such a device. The device comprises a base plate (2), at least two retainer bracket pairs (3) designed to be openable and closable, each of which having a first bracket (31) and a second bracket (32), wherein the at least two first brackets are connected to each other by a bracket connector (7) that is connected to the base plate so as to be rotatable about an axis of rotation (A) that runs parallel to the base plate, and is connected to a pivot lever (4). The device further comprises a carriage (5) that is displaceably mounted on the base plate, wherein the carriage has a link (6) that guides the pivot lever and is designed such that, when the carriage (5) is displaced, the link (6) determines a rotational movement of the pivot lever (4) about the axis of rotation (A), which is parallel to the base plate (2), in both directions of rotation.