Cutting device

By designing a support platform and elastic pads, combined with a cutting blade and baffle positioning structure, the problem of inconsistent cutting of book corners is solved, achieving high-quality cutting results and device durability.

CN223918041UActive Publication Date: 2026-02-17RR DONNELLEY (GUANGDONG) PRINTING SOLUTIONS LTD
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Patent Information

Application Number
CN202520292922.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-02-21
Publication Date
2026-02-17
Estimated Expiration
2035-02-21

AI Technical Summary

Technical Problem

Existing cutting devices often cause the spine to curl up when cutting book corners, especially rounded corners. Low basis weight paper or thick books sag and deform under gravity, resulting in inconsistent cutting and affecting cutting quality and aesthetics.

Method used

The cutting device includes a support platform, elastic pads, and a cutting blade. The pads are located in the mounting groove and are flush with the bearing surface. The cutting blade can be embedded in the pads to support the corners of the book and limit deformation. Combined with baffles and pressing structures, the book is positioned and fixed to ensure cutting accuracy.

Benefits of technology

It improves cutting quality, avoids incomplete cutting and deformation, enhances cutting accuracy, and extends the service life of the cutting blade and pad.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN223918041U_ABST
    Figure CN223918041U_ABST
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Abstract

The utility model provides a cutting device which is used for cutting corners of books and comprises a supporting platform, a cushion block and a cutter. The supporting platform comprises a bearing surface; a mounting groove is formed in the bearing surface, and the mounting groove is recessed inwards relative to the bearing surface; the cushion block has elasticity and is arranged in the mounting groove, and the upper surface of the cushion block is flush with the bearing face. The cutter is arranged above the supporting platform and can move in the direction perpendicular to the bearing face. And the maximum stroke of the cut-off knife in the direction close to the bearing surface is that the cut-off knife abuts against or is embedded into the cushion block. The book is placed in parallel relative to the bearing face, and corners, needing to be cut, in the book correspond to the cushion blocks in position. According to the cutting device, the situation that cutting is not in place can be avoided, the cushion blocks can support corners, needing to be cut, in a book, deformation of the book is limited, the risk that an inclined face is formed in the cutting process is reduced, and the book cutting quality can be improved.
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Description

TECHNICAL FIELD

[0001] The utility model relates to book binding technical field, especially a cutting device. BACKGROUND

[0002] Part of the book needs to cut the corner in the process of binding, for example, make the paper edge of the book neat, or form a round shape etc. The existing cutting device cuts the corner of the book, and the cutting device is fixed in the suspended position to ensure that the cutting knife can completely cut all the paper in the book, and prevent the cutting from being out of place.

[0003] However, when cutting the corner, the cutting position is subjected to a large downward shear force, which may cause the book to be raised at the spine position, and the inner page at the cutting position may retract backward. For low basis weight paper or thick books, the stiffness of the paper is not high, and under the action of gravity, the paper will sag and deform when the cutting position is suspended, which will cause the size of the cut corner to be inconsistent from top to bottom, affecting the cutting quality and appearance.

[0004] The content of the background section of this document is only known by the inventor and does not necessarily represent the state of the art in the field. INVENTION CONTENTS

[0005] In view of one or more defects in the prior art, the utility model provides a cutting device for cutting the corner of a book, which comprises:

[0006] A support platform comprising a bearing surface; the bearing surface is provided with a mounting groove which is recessed inwardly relative to the bearing surface;

[0007] A cushion block having elasticity and arranged in the mounting groove, the upper surface of the cushion block is flush with the bearing surface; and

[0008] A cutting knife arranged above the support platform and configured to move in a direction perpendicular to the bearing surface; and the maximum stroke of the cutting knife in the direction close to the bearing surface is that the cutting knife abuts or embeds in the cushion block;

[0009] Wherein, the book is placed parallel to the bearing surface, and the corner to be cut in the book corresponds to the position of the cushion block.

[0010] According to one aspect of the utility model, the cutting device further comprises:

[0011] A baffle arranged on the support platform, the side edge of the book abuts on the baffle to position the corner to be cut in the book.

[0012] According to one aspect of the utility model, the baffle includes two pieces of sub baffle, the two pieces of sub baffle are mutually perpendicular and are arranged in the plane of the bearing surface, the two sides of the book that are mutually perpendicular are respectively abutted on the two sub baffles to position the corner that needs to be cut in the book, the two pieces of sub baffle are configured to make the corner that needs to be cut in the book correspond to the position of the cushion block.

[0013] According to one aspect of the utility model, the cushion block is separable or movable relative to the mounting groove.

[0014] According to one aspect of the utility model, the cutting device further comprises:

[0015] The pressing structure comprises a pressing plate, the pressing plate is movably pressed on the side of the book away from the bearing surface, and the edge position of the pressing plate is close to or aligned with the corner that needs to be cut in the book.

[0016] According to one aspect of the utility model, the pressing structure further comprises:

[0017] The pressing rod is configured to move in the direction perpendicular to the bearing surface;

[0018] The pressing rod and the pressing plate are rotatably connected through the connecting portion.

[0019] According to one aspect of the utility model, the pressing rod is configured to move in the direction parallel to the bearing surface to change the position of the pressing plate relative to the book, when the pressing plate is pressed on the side of the book away from the bearing surface, the distance between the edge of the pressing plate and the corner that needs to be cut in the book is 5mm-15mm.

[0020] According to one aspect of the utility model, the cutting device further comprises:

[0021] The bracket is fixedly connected with the support platform;

[0022] The sleeve is arranged in the direction perpendicular to the bearing surface and is fixedly connected with the bracket, and the cutting knife is arranged in the sleeve and can move along the sleeve.

[0023] According to one aspect of the utility model, the sleeve is configured to move in the direction perpendicular to the bearing surface to make the lower edge of the sleeve close to the side of the book away from the bearing surface; the cutting knife is separable or rotatable relative to the sleeve.

[0024] According to one aspect of the utility model, the maximum stroke of the cutting knife in the direction close to the bearing surface is embedded in the cushion block, and the depth range embedded in the cushion block is 0.05mm-0.1mm;The cutting knife is a round corner cutting knife, and the cutting edge angle of the cutting knife ranges from 19 to 21 degrees.

[0025] Compared with the prior art, the embodiment of the utility model provides a cutting device for cutting the corners of a book, when the cutting knife cuts the book, the maximum stroke of the cutting knife can abut or be embedded in the inside of the cushion block, avoiding the situation that cutting is not in place, and the cushion block can support the corners of the book that need to be cut, limit the deformation of the book, reduce the risk of cutting to form an inclined plane, and is beneficial to improve the quality of book cutting. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings are included to provide a further understanding of the utility model, and constitute a part of the specification, and are used to explain the utility model together with embodiments of the utility model, and do not constitute the limitation to the utility model.In the drawings:

[0027] Figure 1 It is the structure schematic view of cutting device in some embodiments of the utility model;

[0028] Figure 2 It is the schematic view of support platform in some embodiments of the utility model;

[0029] Figure 3 It is the cooperation schematic view of pressing structure and book in some embodiments of the utility model;

[0030] Figure 4 It is the position relation schematic view of pressing plate and book in some embodiments of the utility model;

[0031] Figure 5A It is the top view of cutting knife relative to cushion block in some embodiments of the utility model;

[0032] Figure 5B It is the side view of cutting knife relative to cushion block in some embodiments of the utility model. DETAILED DESCRIPTION

[0033] In the following, only some exemplary embodiments are simply described.As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the utility model.Therefore, the drawings and the description are considered to be exemplary in nature rather than limiting.

[0034] In the description of the utility model, it is necessary to understand that the orientation or positional relation indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like is the orientation or positional relation based on the orientation or positional relation shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model. In addition, the terms "first" and "second" are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the utility model, the meaning of "multiple" is two or more than two, unless otherwise specifically limited.

[0035] In the description of the utility model, it should be explained that, unless otherwise specifically defined and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected: it can be mechanical connection, or electrical connection or can communicate with each other; it can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements or the interaction relationship between two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0036] In the utility model, unless otherwise specifically defined and limited, the "upper" or "lower" of the first feature to the second feature can include the direct contact of the first and second features, or the contact of the first and second features through another feature between them. Moreover, the "upper", "upper" and "upper" of the first feature to the second feature include the vertical and inclined upward of the first feature above the second feature, or only indicate that the horizontal height of the first feature is higher than that of the second feature. The "below", "below" and "below" of the first feature to the second feature include the vertical and inclined downward of the first feature below the second feature, or only indicate that the horizontal height of the first feature is less than that of the second feature.

[0037] The disclosure below provides many different embodiments or examples for implementing different structures of the present application. For the sake of simplicity, the description below of the specific examples will not be exhaustive of the application. Indeed, the application will be described with additional specificity and detail to convey the requisite technical disclosure to one of ordinary skill in the art, such that one of ordinary skill in the art, upon inspecting the following disclosure, will be able to implement various similar embodiments and / or uses of the present application. It is intended that all such additional examples and implementations of the present application be included within this description, as can be reasonably inferred by one of ordinary skill in the art. Moreover, it is contemplated that the various embodiments and / or examples of the present application can be implemented in various order and / or with various modifications, as will be readily appreciated by persons skilled in the art, and the application includes each and every implementation and example thereof.

[0038] The embodiments of the present application will be described below with reference to the accompanying drawings. It should be understood that the embodiments described herein are merely exemplary and are not intended to limit the present application. In addition, the present application provides various specific examples of processes and materials, but one of ordinary skill in the art can realize the application of other processes and / or the use of other materials.

[0039] Figure 1 The structure of the cutting device 100 according to some embodiments of the present application is shown. The cutting device 100 in this embodiment is used to cut the corners of a book 200 (see Figure 2 ) such as the mouth, top or bottom of the book 200 to form neat sides, or to cut the corners of the book 200 to form right angles or rounded corners, etc. The cutting device 100 will be described below in conjunction with Figure 1 .

[0040] The cutting device 100 includes a support platform 110, a cushion block 120 and a cutting knife 130. The support platform 110 includes a bearing surface 111, which is preferably a horizontal surface, on which the book 200 is placed parallel during cutting. The bearing surface 111 is provided with a mounting groove 112 which is recessed inwardly relative to the plane of the bearing surface 111.

[0041] The cushion block 120 is elastic, for example, made of rubber, silicone, polyurethane, foamed plastic, polypropylene, etc. The cushion block 120 is arranged in the mounting groove 112, and the upper surface of the cushion block 120 is substantially flush with the upper surface of the bearing surface 111. When the book 200 is cut, the position of the corner to be cut in the book 200 corresponds to the position of the cushion block 120. That is, the book 200 is placed parallel on the bearing surface 111, with the corner to be cut above the cushion block 120. The cushion block 120 has a certain strength and can provide support for the book 200 to prevent it from deforming significantly after being pressed.

[0042] The cutting knife 130 is arranged above the support platform 110, and the cutting knife 130 can move along a direction perpendicular to the bearing surface 111, close to or away from the book 200, to cut the corners of the book 200. The shape of the cutting knife 130 can be preselected according to the binding effect of the book 200, for example, the shape of the cutting knife 130 cutting the corners of the book 200 can be a plane, a wave shape, a round corner, a right angle or other shapes.

[0043] The cutting knife 130 moves in the direction close to the bearing surface 111 to cut the corners of the book 200 that need to be cut. In the present application, the maximum stroke of the cutting knife 130 in the direction close to the bearing surface 111 is that the cutting knife 130 abuts against the cushion block 120, or the cutting knife 130 can be embedded in the cushion block 120. In other words, when cutting the book 200, the cutting knife 130 moves in the direction close to the bearing surface 111, and the lowest point of the movement of the cutting knife 130 is that the cutting knife 130 abuts against the cushion block 120, or the cutting knife 130 is pressed into the inside of the cushion block 120.

[0044] The cushion block 120 in the embodiment has elasticity, which can not only provide support for the book 200 and reduce the risk of deformation of the book 200 under the pressure of the cutting knife 130, but also improve the cutting quality of the book 200. In addition, the elasticity of the cushion block 120 can also avoid rigid contact with the blade of the cutting knife 130, which is beneficial to the protection of the cutting knife 130 and prolongs the service life of the cutting knife 130.

[0045] When the cutting knife 130 cuts the book 200, the cutting knife 130 moves to the cushion block 120, and the cushion block 120 can be elastically deformed or the cutting knife 130 can be cut into the inside of the cushion block 120. This can ensure that the cutting knife 130 cuts all the paper in the book 200 and avoids incomplete cutting.

[0046] According to the preferred embodiment of the present application, the cushion block 120 is detachable or movable relative to the mounting groove 112. For example, after the cutting device 100 is used for many times, the structure of the cushion block 120 is damaged and the structural strength is reduced because the cutting knife 130 is embedded in the cushion block 120 for many times. The cushion block 120 can be taken out of the mounting groove 112 and replaced or turned over, or the position of the cushion block 120 in the mounting groove 112 can be provided so that other positions in the cushion block 120 correspond to the blade of the cutting knife 130, thereby prolonging the service life of the cushion block 120.

[0047] Further, in some embodiments, after being used for many times, the damaged part of the cushion block 120 (the depth of the cutting knife 130 embedded in the cushion block 120 when cutting the book 200) can be removed, and a gasket can be arranged in the mounting groove 112 so that the upper surface of the cushion block 120 is flush with the upper surface of the bearing surface 111 to support the book 200.

[0048] As Figure 2 shown in the preferred embodiment of the utility model, the cutting device 100 further includes a baffle 140. The baffle 140 is arranged on the support platform 110, when the book 200 is cut, the book 200 is placed in parallel on the bearing surface 111, and the side edge of the book 200 abuts on the baffle 140, and the corner of the book 200 which needs to be cut is positioned. For example, the baffle 140 has a plane which protrudes from the bearing surface 111, one side edge of the book 200 can abut on the plane of the baffle 140, and the distance between the baffle 140 and the cutting knife 130 can be preset or adjusted, so as to improve the cutting precision of the corner of the book 200.

[0049] According to the preferred embodiment of the utility model, the baffle 140 includes two pieces of sub-baffle 141, the two pieces of sub-baffle 141 are arranged perpendicularly in the plane of the bearing surface 111, and the two pieces of sub-baffle 141 form the approximate right angle relative position relationship as Figure 2 shown in the figure, after the book 200 is placed on the bearing surface 111, two side edges of the book 200 which are perpendicular to each other abut on the two pieces of sub-baffle 141 respectively, so as to position the corner of the book 200 which needs to be cut, and the two pieces of sub-baffle 141 make the corner of the book which needs to be cut correspond to the position of the cushion block 120.

[0050] In the embodiment, the corner of the book 200 is cut by the cutting device 100, the two pieces of sub-baffle 141 are arranged perpendicularly and are spaced apart, after the two side surfaces of the book 200 which are perpendicular to each other are fitted on the two pieces of sub-baffle 141, the position of the corner of the book 200 can be positioned, for example, the corner of the book 200 which needs to be cut is the included angle between two side surfaces which are perpendicular to each other.

[0051] In some embodiments, the baffle 140 is movable or detachable relative to the support platform 110, for example, the position of the baffle 140 can be adjusted and locked according to the size of the book 200, when the book 200 of another size is cut, the position of the baffle 140 on the support platform 110 can be adjusted.

[0052] According to the preferred embodiment of the utility model, the cutting device 100 further includes a pressing structure 150. As Figure 3 shown, the pressing structure 150 includes a pressing plate 151. The pressing plate 151 is movably pressed on the side of the book 200 which is away from the bearing surface 111.

[0053] The pressure plate 151 can fix the book 200 when cutting its corners and prevent deformation of some of the paper in the book 200. For thicker books 200 or books with softer paper, the part away from the cutter 130 may arch upwards during cutting, causing the book 200 to deform and the cut to form a bevel, affecting the cutting quality. In this embodiment, the pressure plate 151 presses down on the side of the book 200 away from the bearing surface 111, keeping the book 200 flat during cutting, which helps to further improve the cutting quality. In this embodiment, the edge of the pressure plate 151 is close to or aligned with the corner of the book 200 that needs to be cut, so that the position of the corner of the book 200 remains fixed during the cutting process.

[0054] In some embodiments, the pressure plate 151 can be manually placed on top of the book 200 and secured by an operator, for example, by adding a counterweight or using a locking device to fix the pressure plate 151 on top of the book 200. In other embodiments, the pressing device 150 can also press the pressure plate 151 on top of the book 200 by automatic control or mechanical transmission.

[0055] like Figure 3 As shown, in some embodiments, the pressing structure 150 further includes a pressure rod 152 and a connecting portion 153. The pressure rod 152 can move along a direction perpendicular to the bearing surface 111. Specifically, the pressure rod 152 can be a motor-driven linkage or a hydraulic device, etc. The pressure rod 152 can be automatically controlled or manually controlled by an operator to move along the direction perpendicular to the bearing surface 111. In a preferred embodiment, the stroke of the pressure rod 152 along the direction perpendicular to the bearing surface 111 (the pressure exerted on the book 200 by the pressure plate 151) is adjustable to accommodate books 200 of different sizes and thicknesses and to reduce the risk of damage to the book 200.

[0056] The pressure plate 151 and the pressure rod 152 are rotatably connected via the connecting part 153. During the process of the pressure plate 151 being pressed onto the book 200 by the pressure rod 152, the pressure plate 151 can rotate relative to the pressure rod 152 under the action of the connecting part 153, so that the pressure plate 151 fully adheres to the surface of the book 200 away from the bearing surface 111. Specifically, the connecting part 153 can be a ball joint. When the pressure rod 152 moves the pressure plate 151 toward the book 200, and under the bidirectional pressure of the pressure rod 152 and the book 200, the ball joint causes the pressure plate 151 to rotate relative to the pressure rod 152, so that the pressure plate 151 adheres to the surface of the book 200.

[0057] According to a preferred embodiment of the present invention, such as Figure 4As shown, when the pressure plate 151 presses down on the side of the book 200 away from the bearing surface 111, the distance between the edge of the pressure plate 151 and the corner of the book 200 that needs to be cut is 5mm-15mm. For example, the distance between the edge of the pressure plate 151 and the corner of the book 200 that needs to be cut is 5mm, 10mm, or 15mm. The distance between the edge of the pressure plate 151 and the corner of the book 200 that needs to be cut can be determined according to factors such as the thickness of the book 200 and the material of the paper. In some preferred embodiments, the pressure plate 151 does not cover the spine, that is, the width of the pressure plate 151 is smaller than the width of the book 200, so as to avoid the pressure of the pressure plate 151 affecting the stability of the spine position in the book 200.

[0058] In some embodiments, the pressure bar 152 can also move in a direction parallel to the bearing surface 111 to move the pressure plate 151 and adjust the position of the pressure plate 151 relative to the book 200 so that the edge of the pressure plate 151 is close to the corner of the book 200 that needs to be cut. Specifically, the position of the pressure bar 152 can be adjusted manually or automatically.

[0059] like Figure 1 As shown, according to a preferred embodiment of the present invention, the cutting device 100 further includes a bracket 160 and a sleeve 170. The bracket 160 is fixedly connected to the support platform 110, and the sleeve 170 is arranged in a direction perpendicular to the bearing surface 111, and the sleeve 170 is fixedly connected to the bracket 160. The cutting blade 130 is disposed inside the sleeve 170 and can move along the sleeve 170. In this embodiment, the sleeve 170 can position the cutting blade 130 during the movement of cutting the book 200 to avoid uneven force on the cutting blade 130, which could cause tilting or displacement.

[0060] In a preferred embodiment of this invention, the sleeve 170 is a hollow cylindrical shape, and the cutter 130 includes a blade and a connecting rod. The sleeve 170 surrounds the connecting rod circumferentially and defines the direction of movement of the connecting rod. The blade is located at the end of the connecting rod closer to the book 200. Furthermore, the sleeve 170 and the connecting rod can also be driven together so that the cutter 130 can move in a direction perpendicular to the bearing surface 111.

[0061] According to a preferred embodiment of the present invention, the sleeve 170 can be configured to move along a direction perpendicular to the bearing surface 111, so that the lower edge of the sleeve 170 is close to the surface of the book 200 away from the bearing surface 111, further shortening the size of the cutting blade 130 that is not within the constraint range of the sleeve 170, and improving the stability of the movement direction of the cutting blade 130.

[0062] In some embodiments, the cutter 130 is detachable or rotatable relative to the sleeve 170. For example, the cutter 130 can be removed and replaced from the sleeve 170, or as... Figure 5AAs shown, the cutter 130 is a rounded cutter that can rotate within the range defined by the sleeve 170 to change the orientation of the rounded corners in the cutter 130 and meet different cutting requirements.

[0063] like Figure 5B As shown, in a preferred embodiment of this invention, when the cutter 130 moves close to the bearing surface 111, its maximum stroke is such that the blade of the cutter 130 embeds into the pad 120. For example, when the cutter 130 moves to its lowest position, the depth of embedding into the pad 120 is 0.05mm-0.1mm, such as 0.05mm, 0.07mm, 0.1mm, etc. In some embodiments, the cutting edge angle of the cutter 130 is in the range of 19°-21°, such as 19°, 20°, or 21°.

[0064] Finally, it should be noted that the above descriptions are merely embodiments of this utility model and are not intended to limit the utility model. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A cutting apparatus characterized by comprising: A cutting device for cutting the corners of a book, the cutting device comprising: a support platform comprising a bearing surface, wherein a mounting groove is provided on the bearing surface and is recessed inwardly relative to the bearing surface; a cushion block having elasticity and being arranged in the mounting groove, wherein the upper surface of the cushion block is flush with the bearing surface; and a cutting knife arranged above the support platform and configured to move in a direction perpendicular to the bearing surface, and the maximum stroke of the cutting knife in the direction close to the bearing surface is that the cutting knife abuts or is embedded in the cushion block; wherein the book is placed parallel to the bearing surface, and the corner to be cut in the book corresponds to the position of the cushion block.

2. The cutting apparatus of claim 1, wherein, The cutting device further comprises: a baffle plate arranged on the support platform, and the side edge of the book abuts on the baffle plate to position the corner to be cut in the book.

3. The cutting apparatus of claim 2, wherein, The baffle plate comprises two sub-baffle plates arranged perpendicular to each other in the plane of the bearing surface, and the two mutually perpendicular side edges of the book abut on the two sub-baffle plates respectively to position the corner to be cut in the book, and the two sub-baffle plates are configured to make the corner to be cut in the book correspond to the position of the cushion block.

4. The cutting apparatus of claim 1, wherein, The cushion block is detachable or movable relative to the mounting groove.

5. The cutting apparatus of claim 1, wherein, The cutting device further comprises: a pressing structure comprising a pressing plate, the pressing plate is movably pressed on the side of the book away from the bearing surface, and the edge position of the pressing plate is close to or aligned with the corner to be cut in the book.

6. The cutting apparatus of claim 5, wherein, The pressing structure further comprises: a pressing rod configured to move in a direction perpendicular to the bearing surface; a connecting portion, the pressing rod and the pressing plate are rotatably connected through the connecting portion.

7. The cutting apparatus of claim 6, wherein, The pressing rod is configured to move in a direction parallel to the bearing surface to change the position of the pressing plate relative to the book, and when the pressing plate is pressed on the side of the book away from the bearing surface, the distance between the edge of the pressing plate and the corner to be cut in the book is 5-15 mm.

8. The cutting apparatus of claim 1, wherein, The cutting device further comprises: a bracket fixedly connected with the support platform; a sleeve arranged in a direction perpendicular to the bearing surface and fixedly connected with the bracket, and the cutting knife is arranged in the sleeve and can move along the sleeve.

9. The cutting apparatus of claim 8, wherein, The sleeve is configured to move in a direction perpendicular to the bearing surface to make the lower edge of the sleeve close to the side of the book away from the bearing surface; and the cutting knife is detachable or rotatable relative to the sleeve.

10. The cutting apparatus according to any one of claims 1-9, wherein, The maximum stroke of the cutting knife in the direction close to the bearing surface is embedded in the cushion block, and the depth range embedded in the cushion block is 0.05-0.1 mm; and the cutting knife is a round corner cutting knife, and the cutting edge angle of the cutting knife is 19-21°.