Paper pressing elastic structure and paper shredder

By designing a paper shredder with a two-stage elastic structure, the pressure of the pressure plate on the paper is optimized, solving the paper jam problem caused by increased friction of paper in the paper box. This enables effective paper shredding under different paper volumes, improving shredding efficiency and effectiveness.

CN224599450UActive Publication Date: 2026-08-07AURORA OFFICE EQUIP
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Patent Information

Application Number
CN202521792580.2
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-08-21
Publication Date
2026-08-07
Estimated Expiration
2035-08-21

AI Technical Summary

Technical Problem

When a large amount of paper is placed into the paper tray of an existing paper shredder at once, the friction between the papers increases exponentially, causing the paper feeding rollers to not feed the paper smoothly, which can easily lead to paper jams or unsatisfactory shredding results.

Method used

It adopts a two-stage elastic structure, in which the stiffness coefficient of the first elastic element is smaller than that of the second elastic element. It is designed as an inverted frustum. The first elastic element is set in the first seat, and the second elastic element abuts against the bottom of the second seat. Through the cooperation of the two-stage elastic elements, the pressure of the pressing board on the paper is optimized, adapting to changes in paper thickness and avoiding over-pressure or under-pressure.

Benefits of technology

Whether there is a lot of paper or a little paper, the pressure plate can ensure that it applies appropriate pressure to the paper, reduce the friction between the papers, prevent paper jams, and improve the efficiency and effect of shredding.

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Abstract

The application provides a paper pressing elastic structure and a paper shredder. The paper pressing elastic structure comprises a first seat, a second seat, a first elastic member and a second elastic member. The top end of the first seat is configured to be close to a cover plate; the top end of the second seat is located in the first seat and is configured to be movable upward relative to the first seat; the top end of the first elastic member is configured to be close to or contact the cover plate, and the bottom end of the first elastic member is arranged on the top end of the second seat and is limited in the horizontal direction by the first seat; the top end of the second elastic member abuts against the bottom end of the second seat, and the bottom end of the second elastic member is configured to be arranged on a paper pressing plate of the paper shredder; and the stiffness coefficient of the first elastic member is smaller than the stiffness coefficient of the second elastic member. By reducing the stiffness coefficient of the first elastic member at the upper level, the first elastic member can provide a larger stroke amount compared with the second elastic member under the same pressure, so that the pressure on the bottom layer of paper can be reduced in the case of multiple papers, and the friction between the papers when the rollers are rubbing the papers can be reduced, thereby facilitating the rollers to rub the papers.
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