Paper cutting blade, blade group and cutting knife device of paper shredder

Abstract

The invention provides a paper cutting blade, a blade group and a cutting knife device of a paper shredder, which are high in efficiency and great in paper shredding effect. The paper cutting blade comprises knife tip parts, a knife face part and a knife back part, wherein chamfered edges on the knife tip parts and beveled edges on the knife back part are separately located at different edge sides, the outer edges of the chamfered edges are connected with the knife tips, and the inner edges of the chamfered edges are connected with the knife face part; and the outer edges of the beveled edges are connected with the peripheral outer wall of the blade, and the inner edges of the beveled edges are connected with the knife back part. According to the invention, a breakthrough is made over a blade stamping technology and assembling method, the chamfered edges on the knife tip parts of the blade and the beveled edges on the knife back part are separately located at different edge sides, the chamfered edges are arranged on the knife face part, the beveled edges are arranged on the knife back part, then, the blade group is combined by two blades, and then, the cutting knife device is combined by the blade groups. Tip clearances in the prior art are thoroughly eliminated. Paper shredding and rolling effects are obviously improved, none of cut paper pieces are strip-shaped, paper clamping and blocking phenomena cannot occur between the two blades, and the paper breaking rate is greatly increased.

Description

technical field [0001] The invention relates to a paper shredder, in particular to a paper cutting blade, a blade group and a cutter device with a new type of paper shredder blade. Background technique [0002] The shredder cutting blade in the prior art is usually made of a leftward blade 1 and a rightward blade 2 (as figure 1 , 2 shown), then the left-hand blade 1 and the right-hand blade 2 are used as the knife back 5 (the side with sharp corners on the blade is called the knife face 4, and the side that processes the corners on the blade into a chamfered side is called Knife back 5, the blade circumferential surface is called the peripheral outer wall 6, the same below) to form the paper cutting blade group 7 (such as image 3 shown), and then several groups of paper cutting blade groups 7 are installed on two parallel rotating shafts 9 to form a cutter device 8 (such as Figure 4 As shown), the paper cutting blade groups 7 on the two rotating shafts 9 are alternately...

AI Technical Summary

Problems solved by technology

However, the above-mentioned tip gap 71 has resulted in an unsatisfactory shredding and paper rolling effect, and the cut paper is often in the shape of long paper strips.

[0005] 2) The tip gap 71 is easy to jam and jam paper. During the shredding process, the shredded paper stuffed into the tip gap 71 is continuously squeezed to produce an outward component force f, so that the left blade 1 is aligned with the right blade 1. The blade 2 has a tendency to separate, and the blade tip 3 will bend and deform over time

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