US-12617111-B2 - Paper cutter

US12617111B2US 12617111 B2US12617111 B2US 12617111B2US-12617111-B2

Abstract

The present application discloses a paper cutter, which is particularly suitable for cutting roll paper, including a hollow cylinder body and a cutting blade. The cutting blade is slidably mounted on a sliding rail structure, so that the cutting blade is detachably connected to the hollow cylinder body. The paper cutter is stable in cutting process and good in cutting quality; the blade is quick and convenient to mount, and the cutting blade can be directly pushed into the sliding rail structure from the bottom of the hollow cylinder body, and to demount or replace, the blade can be pulled out of sliding rails, which is also quick and convenient.

Inventors

Youqing Zhou

Assignees

Youqing Zhou

Dates

Publication Date: 20260505
Application Date: 20240605
Priority Date: 20240522

Claims (9)

1 . A paper cutter, comprising: a hollow cylinder body, wherein the hollow cylinder body is internally provided with a hollow passage for a roll shaped structure to pass through; a side wall of the hollow cylinder body is provided with a strip-shaped slot forming a paper feed passage; a sliding rail structure is provided on the side wall of the hollow cylinder body; the sliding rail structure extends to a bottom of the hollow cylinder body; and one end of the sliding rail structure close to the bottom of the hollow cylinder body is provided with a bottom opening suitable for sliding insertion of a cutting blade, and the sliding rail structure is internally provided with a limiting structure for abutting against the cutting blade; and the cutting blade is slidably inserted and connected in the sliding rail structure, wherein when the cutting blade is mounted in the sliding rail structure, a cutting edge of the cutting blade directly faces the paper feed passage; the paper cutter further comprises a push-pull device, the side wall of the hollow cylinder body is provided with a notch, the push-pull device is movably provided in the notch, and one side of the push-pull device facing the hollow passage is provided with a movable matching surface; and when the push-pull device moves toward an interior of the hollow cylinder body, the movable matching surface enters the interior of the hollow cylinder body and compresses an inner diameter of the hollow passage.
2 . The paper cutter according to claim 1 , wherein the sliding rail structure comprises two sliding rails arranged symmetrically along two sides; and two sides of the cutting blade are provided with sliding connecting portions, and the sliding connecting portions are matched with the sliding rail structure and are suitable for mutual sliding.
3 . The paper cutter according to claim 2 , wherein one end of the sliding rail structure is an opening for the sliding connecting portions to enter, and the other end of the sliding rail structure is a closed limiting surface; and when one end of each of the sliding connecting portions close to the cutting edge abuts against the limiting surface of the sliding rail structure, the cutting edge of the cutting blade directly faces the paper feed passage.
4 . The paper cutter according to claim 2 , wherein the side wall of the hollow cylinder body is further provided with a limiting protruding column protruding therefrom, the limiting protruding column is located between the two sliding rails, a bottom surface of the cutting blade is provided with a bottom sliding groove, and the limiting protruding column is provided in the bottom sliding groove; and when the bottom sliding groove abuts against the limiting protruding column and limits the cutting blade, the cutting edge of the cutting blade directly faces the paper feed passage.
5 . The paper cutter according to claim 1 , wherein a boss structure is further provided on a top surface of the cutting blade in a protruding manner to facilitate pushing and pulling the blade by a hand, and the boss structure is located at one end of the cutting blade opposite to the cutting edge.
6 . The paper cutter according to claim 1 , further comprising an outer handle, wherein the outer handle is fixedly formed on an outer side wall of the hollow cylinder body; and the push-pull device further comprises a jointing portion for connecting the outer handle, and the jointing portion of the push-pull device is movably clamped and connected to the outer handle, so that the movable matching surface is movably provided in the notch.
7 . The paper cutter according to claim 6 , wherein the outer handle is internally provided with an accommodating cavity, and the jointing portion of the push-pull device is inserted and connected to the interior of the accommodating cavity of the outer handle; and the outer handle is provided with a plurality of clamping groove structures, the plurality of clamping groove structures are closely arranged and interconnected along a linear direction, the jointing portion of the push-pull device is provided with snap-fit structures, and the snap-fit structures are alternatively snap-fitted in the clamping groove structures.
8 . The paper cutter according to claim 1 , wherein one end of the strip-shaped slot is an open end, and the other end thereof is a closed end; and a beginning section of the strip-shaped slot relative to an opening is a horn-shaped wide paper feed section, and the width of one side of the wide paper feed section facing the opening gradually increases.
9 . The paper cutter according to claim 8 , wherein a limiting inclined surface is formed on the side wall of the hollow cylinder body, and the limiting inclined surface and the strip-shaped slot are on the same horizontal plane; a flat and straight section is connected to one side of the wide paper feed section facing away from the opening; the limiting inclined surface enables a narrowing section, a transition section and a limiting section to be formed on the paper feed passage in sequence along a direction of the closed end; the narrowing section is in communication with one side of the flat and straight section facing away from the wide paper feed section, and a width of the narrowing section gradually narrows down along a direction of one side of the closed end; and the closed end of the strip-shaped slot is located within the limiting section, and the limiting section is arranged obliquely relative to the transition section.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS The application claims priority of Chinese patent application CN2024211368228, filed on May 22, 2024, which is incorporated herein by reference in its entireties. TECHNICAL FIELD The present application relates to the field of stationery supplies, and particularly relates to a paper cutter. BACKGROUND Cutting paper, especially roll paper (paper rolled into a cylindrical shape, such as gift wrapping paper), is a common task in daily life and work. The most traditional way is to use cutting tools such as cutting knives and scissors to cut, by which there are deficiencies of curved cutting paths thereof, deckled edges, not ideal cutting effect and low standardization degree. For this purpose, a special cutter for roll paper arises, which is of a hollow cylinder-like structure, a side wall of the cylinder may be provided with a strip-shaped slot, and a sharp cutting blade may be mounted inside the tail end of the strip-shaped slot. The working principle of such a roll paper cutter is as follows: a free end of the roll paper is unrolled by a certain length, a roll tube portion of the roll paper is sleeved into a hollow sleeve of the cutter, at the same time, the edge of unrolled paper is inserted into the strip-shaped slot of the paper cutter and clamped and fixed by the strip-shaped slot, and a position to be cut on the edge of the paper abuts against the cutting blade. Then the cutter is pushed forward by a hand along an extension direction of the strip-shaped slot, thereby enabling the blade to cut off the paper. The prior art and the working principle of such the roll paper cutter can refer to the Chinese utility model “Paper Cutter” with the publication number CN219255676U. In an existing roll paper cutter, in order to mount the cutting blade, the strip-shaped slot provided on the side wall of the cylinder usually has two structural forms. (1) One end of the strip-shaped slot is an open end, and the other end thereof is a closed end, and the cutting blade is fixedly mounted inside the closed end; and before cutting, the edge of the paper is inserted into the strip-shaped slot from the open end and slides to the closed end all along the opening of the strip-shaped slot until abutting against the cutting blade. The paper cutter disclosed in the Chinese utility model CN219255676U adopts this structure form. Since the structure of this type of slot has a good guiding effect on the paper, the paper will be limited and fixed when sliding to the closed end, and a cutting edge of the blade will be consistently and stably aligned with the edge of the paper, thereby realizing a stable cutting process. However, the blade is inconvenient to mount, demount and replace. When mounted, the blade needs to be pressed into the strip-shaped slot from up to down, and after being mounted, the blade is harder to demount from the slot. (2) The strip-shaped slot is in the form of a through slot, i.e., both ends of the slot are open ends; the limiting and fixing effect of this type of through slot on the paper is not good enough; and in the cutting process, the cutting edge cannot be stably aligned with the edge of the paper. Specifically, when the edge of the paper slides to the cutting edge along the through slot, two sides of the paper will be constrained by a side wall of the slot. However, since the through slot lacks a closed end, the paper is not constrained in the direction of the end. As a result, the paper is prone to swinging back and forth, and the cutting edge of the blade cannot be consistently and stably aligned with the edge of the paper, which may easily affect the cutting quality. SUMMARY To overcome the deficiencies of the prior art, the purpose of the present application is to provide a paper cutter that can address the problems of the inconvenience of blade mounting and demounting as well as misalignment of the blade in existing paper cutters. The present application is implemented via the following technical solution: A paper cutter comprises a hollow cylinder body, and the hollow cylinder body is internally provided with a hollow passage for a roll-like structure to pass through; a side wall of the hollow cylinder body is provided with a strip-shaped slot forming a paper feed passage; a sliding rail structure is provided on the side wall of the hollow cylinder body; the sliding rail structure extends to the bottom of the hollow cylinder body; one end of the sliding rail structure close to the bottom of the hollow cylinder body is provided with a bottom opening suitable for sliding insertion of a cutting blade, and the sliding rail structure is internally provided with a limiting structure for abutting against the cutting blade; the cutting blade is slidably inserted and connected in the sliding rail structure; and when the cutting blade is mounted in the sliding rail structure, a cutting edge of the cutting blade directly faces the paper feed passage. Further, the slidin