Paper cutting machine capable of rapidly replacing pad cutter strip

Abstract

The utility model relates to a paper cutter capable of quickly replacing a cutter padding strip. The paper cutter comprises a cutting platform, and a paper pressing mechanism, a cutting mechanism, a paper pushing mechanism and a cutter padding mechanism which are respectively positioned on the cutting platform. The cutting platform is provided with a containing groove. The paper pressing mechanism comprises a paper pressing driver, a linkage rod connected with the paper pressing driver, a lifting plate connected with the linkage rod and a paper pressing plate connected with the lifting plate. The cushion cutter mechanism comprises a cushion plate detachably installed on the cutting platform and a cushion cutter strip placed on the cushion plate. The base plate is contained in the containing groove. The front end of the base plate is provided with an L-shaped step part, and the L-shaped step part and the inner wall of the containing groove form a padding strip clamping groove used for containing the cutter padding strip. The rear end of the base plate is detachably connected with the lifting plate. The base plate is driven to be disengaged by means of the lifting action of the paper pressing plate, so that the cutter padding strip is rapidly taken out, rapid replacement of the cutter padding strip is achieved, a screwdriver does not need to be used, the cutting platform and the cutter padding strip cannot be damaged, and safety and reliability are high.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a paper cutter with a fast-changing pad blade strip. Background Art

[0002] In the paper printing industry, it is often necessary to cut the semi-finished products that have been printed to obtain finished products that meet the size requirements. In the industrial operation process, the equipment usually used for paper cutting is a paper cutter. When working, place the paper on the cutting platform of the paper cutter. After the cutting function is started, the paper pressing board presses down to compact the paper, and then the cutter cuts down (usually using an oblique downward cutting activity) to cut the paper. In order to protect the cutter, it is usually necessary to set a knife pad on the cutting platform. The knife pad is generally a rubber block. The knife pad is set at the cutting line of the cutting platform (corresponding to the incision of the paper). When the cutter descends to the bearing surface of the cutting platform, the knife pad is used to connect the knife to avoid the rigid impact between the cutter and the cutting platform, thereby protecting the cutter. After repeated use, the knife pad will be worn. If the wear depth is too large, the paper at the cutting line will lose its force support, causing the paper incision to be cut unbroken (manifested as the last sheet or several sheets of paper cannot be cut unbroken).

[0003] In order to replace the knife pad, the traditional method is to insert a screwdriver into the gap between the knife pad and the cutting platform, and then lift the knife pad. The disadvantage of this design is that the cutting platform and the knife pad are easily damaged during the process of inserting the screwdriver and lifting. In severe cases, the knife pad may even break into several pieces and get stuck in the cutting platform and be difficult to remove. Utility Model Content

[0004] Based on this, the utility model provides a paper cutter for quickly replacing a pad knife strip, utilizing a strip-shaped slot for accommodating the pad knife strip formed between a pad plate and a cutting platform, and utilizing a detachable connection between the pad plate and a lifting plate of a paper pressing mechanism, and using the lifting action of the paper pressing paper to drive the pad plate to be disengaged, thereby quickly bringing out the pad knife strip, thereby realizing quick replacement of the pad knife strip, without the need for a screwdriver, and without causing damage to the cutting platform and the pad knife strip, with high safety and reliability.

[0005] A paper cutter with a quick-change backing blade, comprising:

[0006] The cutting platform is provided with a receiving groove;

[0007] A paper pressing mechanism located on the cutting platform; the paper pressing mechanism includes: a paper pressing driver, a linkage rod connected to the paper pressing driver, a lifting plate connected to the linkage rod, and a paper pressing plate connected to the lifting plate; the paper pressing driver is used to drive the linkage rod to swing to drive the lifting plate to move up and down in a straight line, thereby driving the paper pressing plate to move vertically to the cutting platform;

[0008] A cutting mechanism located on the cutting platform; the cutting mechanism is used for cutting paper;

[0009] A paper pushing mechanism located on the cutting platform; the paper pushing mechanism is used to adjust the front and rear position of the paper; and

[0010] A knife pad mechanism is located on the cutting platform; the knife pad mechanism includes: a pad plate detachably mounted on the cutting platform and a knife pad strip placed on the pad plate; the pad plate is accommodated in a receiving groove; an L-shaped step portion is provided at the front end of the pad plate, and the L-shaped step portion and the inner wall of the receiving groove form a pad strip slot for accommodating the knife pad strip; the rear end of the pad plate is detachably connected to the lifting plate.

[0011] In the above-mentioned paper cutter with quick replacement of the backing knife strip, the backing plate is separated from the lifting plate of the paper pressing mechanism under normal conditions. When working, the paper is placed on the cutting platform, the paper pushing mechanism adjusts the front and rear positions of the paper, and then the paper pressing mechanism presses the paper to fix it, and finally the cutting is achieved through the cutting mechanism. When the backing knife strip needs to be replaced, the backing plate is connected to the lifting plate of the paper pressing mechanism, and the lifting action of the paper pressing board is used to drive the backing plate to be removed from the receiving groove of the cutting platform. The backing knife strip is located on the L-shaped step portion of the backing plate, so the backing knife strip will also be removed together with the backing plate, and the operator can quickly remove the backing knife strip. Through the above-mentioned design, a strip-shaped card slot for accommodating the backing knife strip is formed between the backing plate and the cutting platform, and the detachable connection between the backing plate and the lifting plate of the paper pressing mechanism is used, and the backing plate is driven to be removed by the lifting action of the paper pressing board, so that the backing knife strip is quickly taken out, and the backing knife strip is quickly replaced, without the need to use a screwdriver, and will not cause damage to the cutting platform and the backing knife strip, and the safety and reliability are high.

[0012] In one embodiment, the backing knife mechanism further includes: a locking member; one end of the locking member is detachably connected to the backing plate, and the other end of the locking member is detachably connected to the lifting plate. The backing plate and the lifting plate are detachably connected by the locking member, and the operator can respectively lock and unlock the backing plate and the lifting plate by installing and removing the locking member, which is easy to operate and not prone to errors.

[0013] In one embodiment, the locking member is a U-shaped structural member; one end of the locking member is provided with a first hooking end for hooking the pad, and the other end of the locking member is provided with a second hooking end for hooking the lifting plate. The locking is achieved by hooking, the structure is simple, no auxiliary tools are required, and the operation difficulty is low.

[0014] In one embodiment, wings extending outward are respectively provided on both sides of the pad; the wings are hooked with the second hooking end; and the lifting plate is provided with a hook hole for hooking the first hooking end. The hooking of the wings extending outward with the locking member can reduce the risk of interference between the locking member and the cutting platform.

[0015] In one embodiment, the backing plate and the cutting platform are detachably connected by screws. The screw connection method has a simple structure, low cost and high reliability.

[0016] In one embodiment, the backing plate and the cutting platform are detachably connected by magnets. The magnet connection method has a simple structure, does not require auxiliary tools, and is easy to operate.

[0017] In one embodiment, the cutting platform is an air-floating platform, which can reduce the friction between the cutting platform and the paper, reduce the surface damage to the paper, and reduce the resistance when moving the paper.

[0018] In one embodiment, the longitudinal cross-section of the blade pad is in the shape of a square. Since the longitudinal cross-section of the blade pad is in the shape of a square, when one side of the blade pad is severely worn, it can be switched to another intact side by flipping it over, without directly replacing a new blade pad, thereby reducing material loss and operating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional view of a paper cutter with a quick-change backing blade according to an embodiment of the utility model;

[0020] Figure 2 for Figure 1 A three-dimensional view of another perspective of the paper cutter with a quick-change backing blade strip shown;

[0021] Figure 3 for Figure 1 A partial view of a paper cutter with a quick-change backing blade strip is shown;

[0022] Figure 4 for Figure 3 A partial view of another perspective of the paper cutter with a quick-change backing blade shown;

[0023] Figure 5 for Figure 1 The view of the locking state of the paper pressing plate and the backing plate in the paper cutter with quick replacement of the backing blade strip shown;

[0024] Figure 6 for Figure 5 A view showing the unlocking of the press board and the backing plate in a paper cutter with a quick-change backing blade strip;

[0025] Figure 7 for Figure 1 A combined view of a cutting platform, a backing plate, and a backing strip in a paper cutter with a quick-change backing strip shown;

[0026] Figure 8 for Figure 7 The disassembled view of the cutting platform, backing plate, and backing knife strip shown;

[0027] Fig. 9 for Figure 1 The diagram of the lifting state of the paper pressing board of the paper cutter with quick replacement of the pad blade strip in the paper cutting working mode is shown;

[0028] Fig.10 for Figure 1 The paper cutter with quick-change backing blade strips shown in the figure drives the backing plate to be lifted by the pressing paper board.

[0029] The meanings of the symbols in the accompanying drawings are:

[0030] 100-Paper cutter with quick-change blade pads;

[0031] 10-cutting platform, 11-accommodating tank;

[0032] 20-paper pressing mechanism, 21-linking rod, 22-lifting plate, 221-hook hole, 23-paper pressing plate, 24-counterweight block;

[0033] 30-cutting mechanism, 31-paper cutting drive, 32-cam, 33-rocker, 34-knife holder, 35-cutter, 36-electromagnetic lock;

[0034] 40-paper pushing mechanism, 41-paper pushing driver, 42-screw, 43-nut sleeve, 44-sliding seat, 45-paper pushing board;

[0035] 50 - knife pad mechanism, 51 - pad plate, 511 - wing, 52 - knife pad strip, 53 - magnet, 54 - locking piece, 541 - first hook end, 542 - second hook end. DETAILED DESCRIPTION

[0036] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0037] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0039] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0041] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0042] like Figures 1 to 10 As shown, it is a paper cutter 100 with a quick-change backing blade according to an embodiment of the present invention.

[0043] like Figure 1 and Figure 2 As shown, the paper cutter 100 with quick-change knife pad strips includes: a cutting platform 10, and a paper pressing mechanism 20, a cutting mechanism 30, a paper pushing mechanism 40, and a knife pad mechanism 50 respectively located on the cutting platform 10. Among them, the cutting platform 10 is used to carry the paper to be cut (the paper is generally stacked together). The paper pressing mechanism 20 is used to apply a squeezing force perpendicular to the direction of the cutting platform 10 to the paper before cutting the paper, so that the paper is pressed and fixed. The cutting mechanism 30 is used to cut the paper. The paper pushing mechanism 40 is used to adjust the front and rear position of the paper according to the preset cutting size before pressing the paper. The knife pad mechanism 50 is used to protect the cutting mechanism 30 when it is cutting the paper.

[0044] Below, combined Figures 1 to 10 , the above-mentioned paper cutter 100 with quick replacement of the pad blade is further explained.

[0045] like Figure 4 As shown, the cutting platform 10 is a platform structure with a horizontal bearing surface. Figure 8 As shown, the cutting platform 10 is provided with a receiving groove 11. The receiving groove 11 is located below the paper pressing mechanism 20 and the paper pushing mechanism 40, and the receiving groove 11 is used to accommodate the knife pad mechanism 50.

[0046] Considering that after the paper is placed on the cutting platform 10, it needs to slide on the supporting surface of the cutting platform 10, therefore, reducing the friction between the cutting platform 10 and the paper is helpful to reduce the damage to the paper. Figure 4 As shown, in this embodiment, the cutting platform 10 is an air-floating platform, which can reduce the friction between the cutting platform 10 and the paper, reduce the surface damage to the paper, and reduce the resistance when moving the paper.

[0047] Combination Figure 3 and Figure 4As shown, the paper pressing mechanism 20 includes: a paper pressing driver (not shown), a linkage rod 21 connected to the paper pressing driver, a lifting plate 22 connected to the linkage rod 21, and a paper pressing plate 23 connected to the lifting plate 22. The paper pressing driver is used to drive the linkage rod 21 to swing so as to drive the lifting plate 22 to move up and down in a straight line, thereby driving the paper pressing plate 23 to move up and down perpendicular to the cutting platform 10. The paper pressing driver can be a hydraulic cylinder, and a counterweight block 24 of the linkage rod 21 can also be provided to reduce the load of the hydraulic cylinder.

[0048] like Figure 3 As shown, in this embodiment, the cutting mechanism 30 includes: a paper cutting driver 31, a cam 32 connected to the paper cutting driver 31, a swing rod 33 connected to the cam 32, a knife holder 34 connected to the swing rod 33, and a cutter 35 installed on the knife holder 34. When paper cutting is required, the paper cutting driver 31 drives the cam 32 to rotate, drives the swing rod 33 to swing, so that the knife holder 34 moves up and down along an inclined track in a direction perpendicular to the cutting platform 10 (vertical direction in this embodiment).

[0049] In addition, if Figure 3 As shown, the cutting mechanism 30 further includes an electromagnetic lock 36 connected to the knife holder 34. When the knife holder 34 is lifted to the top and in a waiting state, the position of the knife holder 34 is locked by the electromagnetic lock 36 to prevent the knife holder 34 from falling due to abnormal power failure of the paper cutting driver 31, thereby improving the safety protection for the operator.

[0050] like Figure 3 and Figure 4 As shown, in this embodiment, the paper pushing mechanism 40 includes: a paper pushing driver 41, a screw rod 42 connected to the paper pushing driver 41, a nut sleeve 43 for adjusting the screw rod 42, a slide seat 44 connected to the nut sleeve 43 and slidably connected to the cutting platform 10, and a paper pushing board 45 installed on the slide seat 44. When paper pushing is required, the paper pushing driver 41 drives the screw rod 42 to rotate, drives the slide seat 44 connected to the nut sleeve 43 to slide linearly, so that the paper pushing board 45 can slide back and forth.

[0051] like Figure 7 and Figure 8 As shown, the backing knife mechanism 50 includes: a backing plate 51 detachably mounted on the cutting platform 10 and a backing knife strip 52 placed on the backing plate 51. The backing plate 51 is received in the receiving groove 11. An L-shaped step portion is provided at the front end of the backing plate 51, and the L-shaped step portion and the inner wall of the receiving groove 11 form a backing knife strip slot for receiving the backing knife strip 52. Figure 5 As shown, the rear end of the pad 51 is detachably connected to the lifting plate 22 .

[0052] In this solution, the detachable connection between the backing plate 51 and the cutting platform 10 can be implemented in a variety of specific ways.

[0053] For example, in this embodiment, Figure 8 As shown, the pad 51 and the cutting platform 10 are detachably connected by a magnet 53. The magnet 53 connection method has a simple structure, does not require auxiliary tools, and has low operation difficulty. Among them, the pad 51 may be provided with a receiving groove for accommodating the magnet 53. The magnet 53 can be fixed on the pad 51 or the cutting platform 10. For example, in this embodiment, the magnet 53 is fixed to the cutting platform 10 by screws.

[0054] For example, in other embodiments, the backing plate 51 and the cutting platform 10 are detachably connected by screws. The screw connection method has a simple structure, low cost and high reliability.

[0055] In this solution, the detachable connection between the backing plate 51 and the lifting plate 22 can be realized in a variety of specific ways.

[0056] For example, in this embodiment, Figure 5 As shown, the backing knife mechanism 50 further includes a locking member 54. One end of the locking member 54 is detachably connected to the backing plate 51, and the other end of the locking member 54 is detachably connected to the lifting plate 22. The locking member 54 is used to realize the detachable connection between the backing plate 51 and the lifting plate 22. The operator can install and remove the locking member 54 to respectively realize the locking and unlocking between the backing plate 51 and the lifting plate 22, which is easy to operate and not prone to errors.

[0057] Furthermore, if Figure 5 and Figure 6 As shown, the locking member 54 is a U-shaped structural member. One end of the locking member 54 is provided with a first hooking end 541 for hooking the backing plate 51, and the other end of the locking member 54 is provided with a second hooking end 542 for hooking the lifting plate 22. The locking is achieved by hooking, the structure is simple, no auxiliary tools are required, and the operation difficulty is low.

[0058] Furthermore, if Figure 6 Shown and Figure 7 As shown, wings 511 extending outward are respectively provided on both sides of the pad 51. The wings 511 are hooked with the second hooking end 542. The lifting plate 22 is provided with a hook hole 221 for hooking the first hooking end 541. The hooking of the wings 511 extending outward with the locking member 54 can reduce the risk of interference between the locking member 54 and the cutting platform 10.

[0059] For another example, in other embodiments, a movable snap-fit ​​member or latch member may be provided between the backing plate 51 and the lifting plate 22 to achieve a detachable connection between the two.

[0060] like Figure 7As shown, in this embodiment, the longitudinal cross-section of the backing blade strip 52 is in the shape of a square. Since the longitudinal cross-section of the backing blade strip 52 is in the shape of a square, when one surface of the backing blade strip 52 is severely worn, it can be switched to another intact surface by flipping, without directly replacing a new backing blade strip 52, thereby reducing material loss and lowering operating costs.

[0061] Brief description of working principle:

[0062] like Figure 6 As shown, in normal condition, the pad plate 51 is separated from the lifting plate 22 of the paper pressing mechanism 20. When working, the paper is placed on the cutting platform 10, the paper pushing mechanism 40 adjusts the front and rear position of the paper, and then the paper pressing mechanism 20 presses the paper to fix it, and finally the cutting is realized by the cutting mechanism 30. A strip-shaped card slot for accommodating the pad knife strip 52 is formed between the pad plate 51 and the cutting platform 10. Fig. 9 As shown, since the backing blade strip 52 does not need to be replaced in this state, when the paper pressing plate 23 is raised or lowered, the backing plate 51 and the backing blade strip 52 remain in a stationary state.

[0063] like Figure 5 and Fig.10 As shown, when the backing knife strip 52 needs to be replaced, the backing plate 51 is connected to the lifting plate 22 of the paper pressing mechanism 20, and the lifting action of the paper pressing paper 23 is used to drive the backing plate 51 to escape from the receiving groove 11 of the cutting platform 10. When the paper pressing paper 23 is lifted, the lifting plate 22 will also be lifted, so the backing plate 51 will be lifted together with the paper pressing paper 23 to escape from the cutting platform 10. The backing knife strip 52 is lifted by the L-shaped step portion of the backing plate 51 and is lifted together with the backing plate 51 to achieve the purpose of escaping from the receiving groove 11. The backing knife strip 52 is located on the L-shaped step portion of the backing plate 51, so the backing knife strip 52 will also escape together with the backing plate 51, and the operator can quickly remove the backing knife strip 52.

[0064] When the backing strip 52 needs to be installed, the paper pressing mechanism 20 drives the backing plate 23 to descend and reset, so that the backing plate 23 and the cutting platform 10 are combined together again, and then the backing strip 52 is inserted into the strip-shaped slot. After the backing strip 52 is installed, the backing plate 52 and the lifting plate 22 are unlocked (for example, the locking member 54 is removed).

[0065] The above-mentioned paper cutter 100 with quick replacement of the backing knife strip utilizes the strip-shaped slot for accommodating the backing knife strip 52 formed between the backing plate 51 and the cutting platform 10, and utilizes the detachable connection between the backing plate 51 and the lifting plate 22 of the paper pressing mechanism 20, and uses the lifting action of the paper pressing paper 23 to drive the backing plate 51 to be disengaged, thereby quickly bringing out the backing knife strip 52, thereby realizing quick replacement of the backing knife strip 52, without the need to use a screwdriver, and without causing damage to the cutting platform 10 and the backing knife strip 52, with high safety and reliability.

[0066] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0067] The above embodiments only express the preferred implementation of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A paper cutter with a quick-change backing blade, characterized in that: include: Cutting platform; The cutting platform is provided with a receiving groove; A paper pressing mechanism located on the cutting platform; the paper pressing mechanism comprises: a paper pressing driver, a linkage rod connected to the paper pressing driver, a lifting plate connected to the linkage rod, and a paper pressing plate connected to the lifting plate; the paper pressing driver is used to drive the linkage rod to swing so as to drive the lifting plate to move up and down in a straight line, thereby driving the paper pressing plate to move vertically to the cutting platform; A cutting mechanism located on the cutting platform; the cutting mechanism is used for cutting paper; A paper pushing mechanism located on the cutting platform; the paper pushing mechanism is used to adjust the front and rear position of the paper; and A knife pad mechanism is located on the cutting platform; the knife pad mechanism includes: a pad plate detachably mounted on the cutting platform and a knife pad strip placed on the pad plate; the pad plate is accommodated in the accommodating groove; an L-shaped step portion is provided at the front end of the pad plate, and the L-shaped step portion and the inner wall of the accommodating groove form a pad strip slot for accommodating the knife pad strip; the rear end of the pad plate is detachably connected to the lifting plate.

2. The paper cutter with quick-change backing blade according to claim 1, characterized in that: The backing knife mechanism also includes: a locking piece; one end of the locking piece is detachably connected to the backing plate, and the other end of the locking piece is detachably connected to the lifting plate.

3. The paper cutter with quick-change backing blade according to claim 2, characterized in that: The locking member is a U-shaped structural member; one end of the locking member is provided with a first hooking end hooked to the pad, and the other end of the locking member is provided with a second hooking end hooked to the lifting plate.

4. The paper cutter with quick-change backing blade according to claim 3, characterized in that: The two sides of the pad are respectively provided with wings extending outwards; the wings are hooked with the second hooking end; and the lifting plate is provided with a hook hole hooked with the first hooking end.

5. The paper cutter with quick-change backing blade according to claim 1, characterized in that: The backing plate and the cutting platform are detachably connected via screws.

6. The paper cutter with quick-change backing blade according to claim 1, characterized in that: The pad and the cutting platform are detachably connected via magnets.

7. The paper cutter with quick-change backing blade according to claim 1, characterized in that: The cutting platform is an air-floating platform.

8. The paper cutter with quick-change backing blade according to any one of claims 1 to 7, characterized in that: The longitudinal cross-section of the knife pad is in the shape of a square.

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