CN2383583Y - shredder cutter - Google Patents

Abstract

A cutter for a paper shredder, comprising a pair of cylindrical hobs, each hob includes a hexagonal shaft and a plurality of sets of break blades sleeved on the shaft, and two adjacent breaks A spacer is arranged between the blade groups, and each differential blade group is composed of a first sub-blade and a second sub-blade, each sub-blade has a dodecagonal axis hole and at least nine protruding outwards from the peripheral edge. The cut-off edges of the first and second pair of blades have a difference of 3° to 4° between the front and back of the cut-off edges, and the chamfered edges on the two corresponding cut-off edges form a V-shaped opening.

Description

shredder cutter

The utility model relates to a shredder cutter.

A traditional shredder cutter (as shown in Figure 1) consists of a pair of cylindrical hobs 1, 1' rotating in opposite directions, which are driven by a drive device including a motor and gears . Each cylindrical hob comprises a polygonal shaft 2 (hexagonal as shown in Figure 1) and a plurality of shearing blades 4 sleeved on the shaft, and between two adjacent A spacer 6 is arranged between the shearing blades to space them apart, so that the shearing blades of the two cylindrical hobs are assembled in a staggered manner. This traditional paper shredder mainly cuts the paper into strips of paper scraps by the shearing action of two adjacent blades. However, such long strips of paper scraps are easy to put back together, so for extremely confidential documents, their secrecy is not enough.

Another traditional paper shredder cutter, as shown in Figure 2, although it is provided with three to four (shown in Figure 2 is 4) on the periphery of the shearing blade 4, it is equally azimuthally spaced. Blade 8 is used to cut paper into strip-shaped confetti, but the length of the confetti it cuts out is still too long, and the secrecy is still not enough.

In order to make the paper scraps produced by the shredder difficult to be reassembled and to provide better confidentiality for the processed document content, it is the most efficient way in the shredder industry to keep confidential There is a strong demand for shredder knives for permanent shredding operations.

The purpose of this utility model is to provide a paper shredder cutter, which can produce the best secrecy effect in the most economical and efficient way, and can evenly distribute the force of cutting the paper over the length of the cutter; it can use the smallest motor Output to cut and cut the paper to use energy efficiently and reduce costs, and has the advantages of low noise, smooth paper feeding and low gear damage rate.

The technical scheme of the utility model is:

A paper shredder cutter, which includes two cylindrical hobs rotating in opposite directions, each hob includes a polygonal shaft, and a plurality of sets of break blades sleeved on the shaft, and A spacer is arranged between two adjacent gap blade groups to space them apart, so that the gap blade groups on the two cylindrical hobs are assembled in a staggered manner, wherein each gap blade group is composed of a Consisting of a first sub-blade and a second sub-blade, the paper shredder cutter is characterized in that: the sub-blade of each breaking blade set has a polygonal shaft center hole, the number of sides of which is at least smaller than the number of sides of the shaft more than two sides, and at least nine acute-angled cut-off edges protruding outward from the periphery of the secondary blade, the angle between each cut-off edge and the periphery of the secondary blade is an acute angle, and each cut-off edge has a beveled edge, Wherein the first sub-blade and the second sub-blade correspond to the cut-off edge with a difference of 3° to 4° between the front and back, and the chamfered edge tips on the two corresponding cut-off edges form a V-shaped opening. A circle of radial protrusions is formed on the outer peripheral wall. It removes paper dust that may accumulate in the V-shaped opening, making the cutting action of the knife smoother.

In an embodiment of the present invention, the number of the cut-off blades is not more than nineteen, and nine, eleven, thirteen, seventeen, and nineteen cut-off blades are the most optimal.

Compared with the prior art, the utility model has the following advantages:

1. The processed documents have excellent confidentiality: since the cutting blade set of the utility model has at least eleven cutting blades, the length of shredded paper after processing is equal to that of shredded paper produced by traditional knives. 1/3 to 1/5, so it is almost impossible to put it back together again, thus providing better confidentiality.

2. The power to cut off the paper can be evenly distributed in the length direction of the cutter: since the number of sides of the polygon of the axis hole of the cutting blade group is greater than the number of sides of the cutter shaft, the truncation on the combined cylindrical cutter The blades may form a continuous helical blade, ie at each point in time a maximum of two cut-off blades are in contact with the paper.

3. It can reduce the cost of the paper shredder: since the cutter of the utility model has at most two cutting blades to cut the paper at any point in time, the required driving force of the cutter can be reduced a lot. In other words, a smaller motor can be used to cut the paper. Drive the knives, thus reducing the cost of the overall shredder.

4. Since the cutting blade of the utility model is combined with the first sub-blade and the second sub-blade, the difference between the corresponding cutting edge is 3° to 4°, and each time the paper is cut off by the cutting knife is implemented in two stages, This further distributes the cutting force.

5. It can improve the quality of the whole paper shredder: because the new type of gasket used in this application has a circle of radial protrusions on its outer circumference, it can remove the paper scraps that may accumulate on the edge of the cutting edge, This makes the action of cutting the paper by the cutting blade group more reliable and smooth, and makes the quality of the shredded paper after processing better and more confidential.

Brief description of the drawings

Fig. 1 is a three-dimensional schematic diagram of a traditional paper shredder cutter;

2 is a three-dimensional schematic diagram of another traditional paper shredder cutter;

Fig. 3 is a three-dimensional schematic diagram of an embodiment of a paper shredder cutter of the present invention;

Fig. 4A is a front view of the first secondary blade of the break blade of the paper shredder cutter of the present invention;

Fig. 4B is a front view of the second auxiliary blade of the break blade of the paper shredder cutter of the present invention;

Fig. 4C is a front view of the cutting blade set of the paper shredder cutter of the present invention formed after the combination of the first and second auxiliary blades in Figs. 4A and 4B;

Fig. 4D is a side view of the break blade group of the paper shredder cutter of the utility model shown in Fig. 4C;

Fig. 5A is the front view of the washer in the paper shredder cutter of the present utility model; and

Fig. 5B is an enlarged schematic side view of the relative arrangement between the shim and the breaking blade group in the paper shredder cutter of the present invention.

The preferred embodiment of the utility model is described in detail as follows:

The utility model will be described according to the embodiment shown in Figures 3 to 5, but it should be understood that this embodiment is only used for illustration and does not mean that the utility model is limited to the structure shown in the embodiment .

As can be seen from Figure 3, the paper shredder cutter of the present utility model is composed of two cylindrical hobs 10, 10', each hob includes a hexagonal shaft 12, and multiple groups are sleeved on the The gap blade group 14 on the axle bar is provided with a spacer 16 between two adjacent gap blade groups to space it apart, so that the gap blades on the two cylindrical hobs are connected with the gap blades. Groups are assembled in such a way that they are interleaved with each other. Each breaker knife set 14 is composed of a first set of auxiliary blades 14a and a second auxiliary blade 14b, as shown in FIG. 4c.

In addition, because the number of sides of the polygon of the axial center hole 20 of the discontinuity blade group is greater than the number of sides of the tool shaft 12, so all the cut-off edges on the cylindrical tool 10 after the combination form a continuous helical blade, such as As shown in FIG. 3 , at each time point, at most only two cut-off blades are in contact with the paper, so that the required shredding effect can be achieved with the minimum driving force, so as to reduce costs and meet economic benefits.

Referring now to Fig. 4A, 4B, 4C and 4D, Fig. 4A is a detailed view of the first sub-blade 14a, clearly seen from Fig. 4A, the first sub-blade 14a has a dodecagonal axis hole 20a, and has Thirteen acute-angle cutting edges a1-a13 protrude outward from the peripheral edge of the secondary blade 14a, wherein the cutting edges a1-a13 are formed at equal intervals on the peripheral edge of the secondary blade 14a. In addition, a chamfered edge T is formed at the tip of each cut-off edge, making it easier for the cut-off edge to pierce the paper and cut it off.

The basic structure of the second sub-blade 14b in FIG. 4B is similar to that of the first sub-blade 14a in FIG. 4A. It also has thirteen acute-angled cutting edges b1-b13 protruding from the periphery of the second sub-blade 14b. , the difference between the two is only the angle of the periphery of the axial hole 20b. In detail, an apex angle A of the periphery of the axial center hole 20a is located on a straight line connecting two points between the cutting edge a1 and the center of the circle B, as shown in FIG. The apex angle A' of the angle A deviates from the straight line connecting the cutting edge b1 and the center B' by an angle. Therefore, when the first and second secondary blades 14a and 14b are combined into a differential blade set 14, as shown in Figure 4C, the corresponding cutting edges, such as a1 and b1, a2 and b2, a3 and b3, etc. That is, a fault angle α will be generated. When the gap angle ranges from 3° to 4°, the truncation effect is the best. In addition, the chamfering edges T' of the cutting edges b1-b11 on the second sub-blade 14b have opposite chamfering directions, so that when the first sub-blade 14a and the second sub-blade 14b are combined to form the split blade set 14, A V-shaped notch S is formed between the chamfered edges T and T′ on the corresponding cut-off edge, as shown in FIG. 4D .

Although the breaking blade set 14 in FIGS. 4A-4D is illustrated as an embodiment having thirteen cutting edges, it should be understood that the number of cutting edges may range from nine to nineteen. Any number in between, but nine, eleven, thirteen, seventeen and nineteen are the best.

The gasket 16 of the present invention will now be described with reference to FIGS. 5A and 5B. FIG. 5A shows the spacer 16 used in the tool of the present invention, which has a hollow ring for sheathing on the shaft 12 , and has a radial protrusion 161 formed on the outer circumference. The protrusion 161 is designed to be aligned with the V-shaped notch S of the cutting edge on the corresponding breaking blade set after assembly, as shown in FIG. The scraps of paper in the middle make the action of cutting the paper by the cutting blade group more reliable and smooth, and make the quality of the shredded paper after processing better and more confidential.

During operation, the cutter of the paper shredder of the present utility model cuts the paper into long strips in addition to cutting the paper into long strips through the shearing action between the two-phase staggered set of break blades 14. 1 to 19 cut-off blades cut off each strip of paper scraps into pieces of very short length, so as to improve the confidentiality of the content of the document.

To sum up, the paper shredder cutter of the present invention can effectively improve the paper shredding quality of the paper shredder and improve the confidentiality of the document content.

Claims (6)

1. A paper shredder cutter, which includes two cylindrical hobs that rotate in opposite directions, each hob includes a polygonal shaft, and multiple groups of break blades set on the shaft , and a spacer is provided between two adjacent gap blade sets to space them apart, so that the gap blade sets on the two cylindrical hobs are assembled in a staggered manner, wherein each gap blade set is Consisting of a first sub-blade and a second sub-blade, the paper shredder cutter is characterized in that: the sub-blade of each breaking blade set has a polygonal shaft center hole, the number of sides of which is at least smaller than that of the shaft The number of sides is more than two sides, and there are at least nine acute-angled cut-off edges protruding outward from the peripheral edge of the auxiliary blade, the angle between each cut-off edge and the peripheral edge of the auxiliary blade is an acute angle, and each cut-off edge has a beveled cutting edge sharp, wherein the first sub-blade and the second sub-blade corresponding to the cut-off edge have a difference of 3° to 4° between the front and rear, and the chamfered cutting edges on the two corresponding cut-off edges form a V-shaped opening, each pad A ring of radial protrusions is formed on the outer peripheral wall of the sheet. 2. The paper shredder cutter according to claim 1, wherein the number of cutting blades is not more than nineteen. 3. The paper shredder cutter according to claim 1, wherein the number of the cut-off blades is eleven. 4. The paper shredder cutter according to claim 1, wherein the number of cutting blades is thirteen. 5. The paper shredder cutter according to claim 1, wherein the number of the cut-off blades is seventeen. 6. The paper shredder cutter according to claim 1, wherein the number of cutting blades is nineteen.

Images