Paper Clamp Structure for Variable-Thickness Sheet Retention
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Solution Overview
Problem
Existing paper clamping devices require users to hold both the device and the pad of paper with their hands when inserting or removing it, limiting practicality.
Innovation Solution
A clamping device with a pivoting shaft and flexible elastic element at the entrance of the stacking area that securely retains multiple sheets of paper, accommodating varying thicknesses, allowing single-handed operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional clamping devices with hooks are used, then the device structure is simple, but the user must hold both the device and pad of paper with hands during insertion and removal
Solution Approach 1:
The clamping device incorporates a self-latching mechanism with a spring-loaded lever that automatically engages with the board's holes. When the pad is inserted, the lever is pushed inward and automatically snaps into the engaged position, releasing the pad without requiring manual intervention. This self-service mechanism enables single-handed operation while maintaining reasonable structural complexity
Solution Approach 2:
The device uses a dynamic lever mechanism that can move between retracted and engaged positions. The spring provides continuous force to push the lever outward for automatic latching, while the lever's pivoting motion allows it to transition smoothly between states. This dynamic behavior enables automatic clamping action without requiring the user to manually manipulate both the device and paper pad
2Reliability
If hooks are used to clamp papers, then the device is simple to manufacture, but the retention firmness is insufficient for pads of varying thickness
Solution Approach 1:
The lever mechanism allows the clamping force to be adjusted based on the pad thickness. As the pad thickness varies, the lever automatically adjusts its engagement depth and the spring adjusts its compression level, maintaining consistent retention firmness across different pad sizes. This parameter adaptation resolves the contradiction between reliable retention and manufacturing simplicity
Solution Approach 2:
The clamping function is divided into multiple components: the lever arm, the spring element, the engagement protrusion, and the interaction with the board's holes. This segmentation allows each component to be manufactured separately using simple processes, yet when assembled, they create a reliable retention mechanism that adapts to varying pad thicknesses
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
Enables firm retention of multiple sheets of paper, independent of thickness, facilitating single-handed insertion and removal, and secure attachment to a support board.
Implementation Method 1
a flexible elastic element (9), arranged on the inner face of the rear delimiting surface (4), projected towards the interior of the stacking area of the sheets of paper
Implementation Method 2
a pivoting shaft (11) and a flexible elastic element (9) at the entrance of a stacking area for the sheets of paper, which act jointly to firmly and safely retain a plurality of sheets of paper
Data Source
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AI summary
The invention is related to a clamping device (1) for a plurality of sheets of paper comprising an anterior delimiting surface (2); an upper delimiting surface (3); a rear delimiting surface (4); an inner delimiting surface (5); wherein a stacking area for the sheets of paper includes a first ridge (8); a second ridge (10), which is connected to a pivoting shaft (11); and a flexible elastic element (9). In this way, the stacking area for sheets of paper is adapted to hold sheets of paper with differentiated amounts of paper or sheets of paper having differentiated thickness, considering the joint action between the first ridge (8), the flexible elastic element (9) and the pivoting shaft (11).