Code printing equipment for small negotiable securities

Abstract

The invention provides code printing equipment for small negotiable securities. The code printing equipment for the small negotiable securities comprises a paper feeding unit, a code printing unit and a code printing unit, the printing unit is connected with the paper feeding unit, the printing unit comprises a number cylinder and an impression cylinder, the number cylinder and the impression cylinder are vertically arranged, the number cylinder and the impression cylinder move oppositely and circularly, and a base material to be printed enters the tangent area of the number cylinder and the impression cylinder to be printed; the paper collecting unit is connected with the printing unit and used for collecting the printed base material; and the conveying unit is used for conveying the base material to be printed, the conveying unit comprises a first conveying unit and a second conveying unit, the first conveying unit is connected with the paper feeding unit and the printing unit, and the second conveying unit is connected with the printing unit and the paper collecting unit. The code printing equipment for the small negotiable securities can realize number printing on the small negotiable securities, and has the characteristics of high production efficiency, flexible application, compact structure, modular installation and wide application range.

Description

Technical Field

[0001] The present application relates to the technical field of code printing equipment, and in particular to a code printing equipment for small securities. Background Art

[0002] The printing of securities (such as banknotes, bills, etc.) is to cut the large-format printed products (i.e. large sheets of securities) printed in full pages into single sheets (i.e. small sheets of securities) that can be circulated in the market. The serial number is an important printing feature on securities and is also the only variable information that distinguishes securities from each other. In actual production, there are situations where the numbers of small sheets of securities need to be reprinted due to unqualified quality, number continuity requirements, etc. (i.e., the code supplement process), which is usually achieved by cutting after large-sheet full-page printing or by small-sheet manual code supplement equipment. However, large-sheet full-page printing has problems such as multiple code supplements on large sheets and long production cycles; the existing small-sheet code supplement equipment is all circular flattening, that is, the printing number device makes a circular motion and the printing substrate makes a horizontal motion on the platform, which has problems such as high labor intensity and low production efficiency. Summary of the invention

[0003] The present application aims to solve at least one of the above-mentioned technical problems.

[0004] To this end, the first purpose of the present application is to provide a small-size securities printing device.

[0005] To achieve the first objective of the present application, the technical solution of the first aspect of the present invention provides a small-sheet securities printing device, comprising: a paper feeding unit, used to input a substrate to be printed; a printing unit, connected to the paper feeding unit, the printing unit comprising a number roller and an impression roller, the number roller and the impression roller are arranged vertically, the number roller and the impression roller move in a circular motion toward each other, and the substrate to be printed is printed by entering the tangent area of ​​the number roller and the impression roller; a paper receiving unit, connected to the printing unit, used to collect the substrate to be printed after printing is completed; a conveying unit, used to realize the conveyance of the substrate to be printed, the conveying unit comprising a first conveying unit and a second conveying unit, the first conveying unit connecting the paper feeding unit and the printing unit, and the second conveying unit connecting the printing unit and the paper receiving unit.

[0006] According to the technical solution provided by the present application, the small-sheet securities printing equipment includes a paper feeding unit, a printing unit, a paper receiving unit and a conveying unit. The paper feeding unit is used to convey the substrate to be printed to the conveying unit. The printing unit includes a number roller and an impression roller, which are arranged vertically. The printing substrate enters the middle of the two rollers through the conveying unit, and the two rollers move in a circular motion toward each other. The substrate to be printed enters the tangent area of ​​the number roller and the impression roller to realize the printing of the serial number on the paper, that is, the number printing is a circle-on-circle method. The paper receiving unit is connected to the printing unit and is used to collect the substrate to be printed after printing. The conveying unit is used to realize the conveyance of the substrate to be printed. Through the small-sheet securities printing equipment provided by the present application, the number printing on the small-sheet securities can be realized when the small-sheet securities need to be supplemented with codes, with high production efficiency, flexible application, compact structure, modular installation, and a wide range of applications.

[0007] In addition, the technical solution provided by this application may also have the following additional technical features: In some technical solutions, optionally, the small-size security printing device further includes: a lateral adjustment component, which is arranged between the first conveying unit and the printing unit, and includes two positioning plates and a guide plate, wherein the guide plate is located on one side of the positioning plate, and the two positioning plates are movably arranged, and the lateral adjustment component is used to guide the substrate to be printed on the first conveying unit into the lateral positioning area through the guide plate, and the lateral positioning of the substrate to be printed is achieved by adjusting the position and spacing of the two positioning plates.

[0008] In the technical solution, the small-size securities printing device further includes a transverse adjustment component, and the position of the substrate to be printed in the printing area is transversely positioned by the transverse adjustment component. Specifically, the transverse adjustment component is located between the first conveying unit and the printing unit, and is composed of a positioning plate and a guide plate. The substrate to be printed enters the transverse positioning area through the guide plate of the transverse adjustment component under the belt conveyance of the first conveying unit, and the transverse positioning of the substrate to be printed is achieved by adjusting the position and spacing of the two positioning plates.

[0009] In some technical solutions, optionally, the small-sheet securities printing equipment also includes: a paper detection sensor, which is arranged between the first conveying unit and the printing unit; a longitudinal adjustment component, which is arranged at the bottom of the first conveying unit, including a push claw, which is movably arranged. The longitudinal adjustment component is used for when the substrate to be printed enters the lateral positioning area and triggers the paper detection sensor, the push claw moves longitudinally according to a preset movement law and contacts the rear end face of the substrate to be printed, so as to push the substrate to be printed into the printing unit to achieve lateral positioning of the substrate to be printed.

[0010] In this technical solution, the small-size securities printing device further includes a paper detection sensor and a longitudinal adjustment component, and the position of the substrate to be printed in the printing area is longitudinally positioned by the longitudinal adjustment component. Specifically, the longitudinal adjustment component is located below the first conveying unit and is composed of a push claw, a guide component, etc. When the substrate to be printed enters the transverse positioning area and triggers the paper detection sensor, the push claw of the longitudinal adjustment component moves longitudinally according to a certain movement law and contacts the rear end face of the substrate to be printed, pushing the substrate to be printed into the printing unit to achieve transverse positioning of the substrate to be printed.

[0011] In some technical solutions, optionally, the number roller includes a number roller shaft, a number print head fixing ring, a first number print head group and a second number print head group, the first number print head group includes at least one number print head, the second number print head group includes at least one number print head, the first number print head group and the second number print head group are both fixed on the number roller shaft through the number print head fixing ring, and multiple number printing can be achieved through multiple first number print head groups and number print heads.

[0012] In this technical solution, the number roller includes a number roller shaft, a number print head fixing ring, a first number print head group, a second number print head group, a paper pressing wheel and a power gear. The first number print head group includes at least one number print head, the second number print head group includes at least one number print head, and both the first number print head group and the second number print head group are fixed on the number roller shaft through the number print head fixing ring.

[0013] In some technical solutions, optionally, the number printheads of the first number printhead group include horizontal number printheads or vertical number printheads or a combination of horizontal and vertical numbers, and the number printheads of the second number printhead group include horizontal number printheads or vertical number printheads or a combination of horizontal and vertical numbers.

[0014] In this technical solution, the number print heads of the first number print head group include horizontal number print heads or vertical number print heads or a combination of horizontal and vertical numbers, and the number print heads of the second number print head group include horizontal number print heads or vertical number print heads or a combination of horizontal and vertical numbers. Horizontal number printing or vertical number printing, or a combination of horizontal and vertical numbers can be realized on the substrate to be printed.

[0015] In some technical solutions, optionally, the number printing heads of the first number printing head group are mechanical number printing heads or electronically controlled number printing heads; and / or the number printing heads of the second number printing head group are mechanical number printing heads or electronically controlled number printing heads.

[0016] In this technical solution, the number printing heads of the first number printing head group are mechanical number printing heads or electronically controlled number printing heads, and the number printing heads of the second number printing head group are mechanical number printing heads or electronically controlled number printing heads.

[0017] In some technical solutions, optionally, the number of the pushing claws is one or more, and the plurality of pushing claws are arranged at intervals at the bottom of the first conveying unit.

[0018] In this technical solution, the number of the pushing claws is one or more, and the plurality of pushing claws are arranged at intervals at the bottom of the first conveying unit.

[0019] In some technical solutions, optionally, the first conveying unit includes a first belt and a first roller, the first belt is wound around the first roller; and / or the second conveying unit includes a second belt and a second roller, the second belt is wound around the second roller.

[0020] In this technical solution, the first transmission unit includes a first belt and a first roller, the first belt is wound around the first roller, and the second transmission unit includes a second belt and a second roller, the second belt is wound around the second roller.

[0021] In some technical solutions, optionally, there are multiple first rollers, which are spaced apart between the paper feeding unit and the printing unit; and / or there are multiple second rollers, which are spaced apart between the printing unit and the paper receiving unit.

[0022] In this technical solution, there are multiple first rollers, which are arranged at intervals between the paper feeding unit and the printing unit. There are multiple second rollers, which are arranged at intervals between the printing unit and the paper receiving unit.

[0023] Additional aspects and advantages of the present application will become apparent in the following description or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the main structure of a small-size securities code printing device according to an embodiment of the present application; Figure 2 This is a partial three-dimensional structural diagram of a small-size securities code printing device according to an embodiment of the present application; Figure 3 This is a partial three-dimensional structural diagram of a small-size securities code printing device according to another embodiment of the present application; Figure 4 This is a partial three-dimensional structural diagram of a small-size security code printing device according to another embodiment of the present application.

[0025] in, Figures 1 to 4 The corresponding relationship between the reference numerals and component names in the figure is: 10: small-sheet securities printing equipment; 110: paper feeding unit; 120: printing unit; 122: number roller; 124: impression roller; 130: paper receiving unit; 140: transmission unit; 142: first transmission unit; 144: second transmission unit; 150: lateral adjustment assembly; 152: positioning plate; 154: guide plate; 160: paper detection sensor; 170: longitudinal adjustment assembly; 172: push claw; 180: first number printing head group; 182: second number printing head group; 184: number roller shaft; 186: number printing head fixing ring; 188: paper pressing wheel; 190: power gear; 192: impression roller body; 194: eccentric shaft; 196: rubber cloth; 198: rubber cloth fixing assembly; 202: number printing head; 210: first belt; 212: first roller; 214: second belt; 216: second roller. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purposes, features and advantages of the present application, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0028] Refer to the following Figures 1 to 4 The invention describes the small-sheet securities printing device according to some embodiments of the present application.

[0029] like Figure 1 , Figure 2 , Figure 3 and Figure 4As shown, the embodiment of the first aspect of the present invention provides a small-sheet security printing device 10, comprising a paper feeding unit 110, a printing unit 120, a paper receiving unit 130, and a conveying unit 140. Specifically, the paper feeding unit 110 is used to input a substrate to be printed. The printing unit 120 is connected to the paper feeding unit 110, and the printing unit 120 comprises a number cylinder 122 and an impression cylinder 124, the number cylinder 122 and the impression cylinder 124 are arranged vertically, and the number cylinder 122 and the impression cylinder 124 move in a circular motion toward each other, and the substrate to be printed is printed by entering the tangent area of ​​the number cylinder and the impression cylinder. The paper receiving unit 130 is connected to the printing unit 120, and is used to collect the substrate to be printed after printing. The conveying unit 140 is used to realize the conveyance of the substrate to be printed, and the conveying unit 140 comprises a first conveying unit 142 and a second conveying unit 144, the first conveying unit 142 connects the paper feeding unit 110 and the printing unit 120, and the second conveying unit 144 connects the printing unit 120 and the paper receiving unit 130.

[0030] In this embodiment, the small-sheet securities printing device 10 includes a paper feeding unit 110, a printing unit 120, a paper receiving unit 130, and a conveying unit 140. The paper feeding unit 110 is used to convey the substrate to be printed to the conveying unit 140. The printing unit 120 includes a numbering cylinder 122 and an impression cylinder 124, which are arranged vertically. The printed substrate enters the middle of the two cylinders through the conveying unit 140, as shown in FIG. Figure 1 As shown by the middle arrow, the two rollers move in a circle toward each other to print the number of the securities, that is, the number printing is a circle-on-circle method. The paper collection unit 130 is connected to the printing unit 120 and is used to collect the substrate to be printed after printing. The transmission unit 140 is used to realize the transmission of the substrate to be printed. The small-sheet securities printing device 10 provided by the present application can realize the number printing on the small-sheet securities when the small-sheet securities need to be supplemented with codes, with high production efficiency, flexible application, compact structure, modular installation, and wide application range.

[0031] In some embodiments, the small-size securities printing device 10 may further include a transverse adjustment component 150, and the position of the substrate to be printed in the printing area is transversely positioned by the transverse adjustment component 150. Specifically, the transverse adjustment component 150 is located between the first conveying unit 142 and the printing unit 120, and is composed of a positioning plate 152 and a guide plate 154. The substrate to be printed enters the transverse positioning area through the guide plate 154 of the transverse adjustment component 150 under the belt conveyance of the first conveying unit 142, and the transverse positioning of the substrate to be printed is achieved by adjusting the position and spacing of the two positioning plates 152.

[0032] In some embodiments, the small-size securities printing device 10 may further include a paper detection sensor 160 and a longitudinal adjustment assembly 170. Specifically, the longitudinal adjustment assembly 170 is located below the first conveying unit 142 and is composed of a push claw 172, a guide assembly, etc. When the substrate to be printed enters the transverse positioning area and triggers the paper detection sensor 160, the push claw 172 of the longitudinal adjustment assembly 170 moves longitudinally according to a certain movement rule and contacts with the rear end face of the substrate to be printed, pushing the substrate to be printed into the printing unit 120 to achieve transverse positioning of the substrate to be printed.

[0033] In some embodiments, optionally, the number roller 122 includes a number roller shaft 184, a number print head fixing ring 186, a first number print head group 180, a second number print head group 182, a pressure wheel 188 and a power gear 190, the first number print head group 180 includes at least one number print head 202, the second number print head group 182 includes at least one number print head 202, the first number print head group 180 and the second number print head group 182 are both fixed on the number roller shaft 184 by the number print head fixing ring 186, and the impression roller 124 includes an impression roller body 192, an eccentric shaft 194, a rubber cloth 196 and a rubber cloth fixing assembly 198.

[0034] In some embodiments, optionally, the number print heads 202 of the first number print head group 180 include horizontal number heads or vertical number heads or a combination of horizontal and vertical numbers, and the number print heads 202 of the second number print head group 182 include horizontal number heads or vertical number heads or a combination of horizontal and vertical numbers, so that horizontal number printing or vertical number printing, or a combination of horizontal and vertical numbers can be achieved on the substrate to be printed.

[0035] In some embodiments, optionally, the small security printing device 10 is suitable for a plastic substrate or a paper substrate.

[0036] In some embodiments, optionally, the width of the substrate to be printed is greater than or equal to 45 mm, and the width of the substrate to be printed is less than or equal to 165 mm.

[0037] In some embodiments, optionally, the length of the substrate to be printed is greater than or equal to 85 mm, and the length of the substrate to be printed is less than or equal to 225 mm.

[0038] In some embodiments, the applicable range of the substrate to be printed is 70 g / m 2 ~700g / m 2 .

[0039] In some embodiments, optionally, the first conveying unit 142 includes a first belt 210 and a first roller 212, and the first belt 210 is wound around the first roller 212. The second conveying unit 144 includes a second belt 214 and a second roller 216, and the second belt 214 is wound around the second roller 216.

[0040] In some embodiments, optionally, there are multiple first rollers 212, which are spaced apart between the paper feeding unit 110 and the printing unit 120. There are multiple second rollers 216, which are spaced apart between the printing unit 120 and the paper receiving unit 130.

[0041] In some embodiments, optionally, the number of the pushing claws 172 is one or more, and the plurality of pushing claws 172 are disposed at intervals at the bottom of the first conveying unit 142 .

[0042] In some embodiments, optionally, the number printing heads 202 of the first number printing head group 180 are mechanical number printing heads or electronically controlled number printing heads, and the number printing heads 202 of the second number printing head group 182 are mechanical number printing heads or electronically controlled number printing heads.

[0043] like Figure 1 , Figure 2 and Figure 3 As shown, a small-size security code printing device 10 according to a specific embodiment of the present application has the characteristics of high production efficiency, flexible application, compact structure, modular installation, and wide application range.

[0044] Specifically, this embodiment provides a small-size security printing device 10, which realizes the number printing on the small-size security. The specific printing principle is: the number cylinder 122 and the impression cylinder 124 are arranged vertically, the printing substrate enters the middle of the two cylinders through the transmission module, and the two cylinders move in a circular motion towards each other to realize the number printing of the security, that is, the number printing is a circle-on-circle method.

[0045] The small-size securities printing device 10 adopts a modular design concept and is easy to install and maintain, and specifically comprises: a paper feeding unit 110 , a transmission unit 140 , a printing unit 120 and a paper receiving unit 130 .

[0046] The paper feeding unit 110 is used to convey the substrate to be printed to the conveying unit 140 .

[0047] The conveying unit 140 includes a conveying unit I (a first conveying unit 142) and a conveying unit II (a second conveying unit 144), each of which is composed of a series of belts and rollers, and is used to convey the substrate to be printed between the units in the device.

[0048] Printing unit 120: includes number cylinder 122 and impression cylinder 124, to realize the printing of serial numbers on paper. Wherein: number cylinder 122 is composed of number cylinder shaft 184, number printing head fixing ring 186, first number printing head group 180, second number printing head group 182, paper pressing wheel 188, power gear 190, etc., the first number printing head group 180 and second number printing head group 182 are respectively fixed to number cylinder shaft 184 through number printing head fixing ring 186; impression cylinder 124 is composed of impression cylinder body 192, eccentric shaft 194, rubber blanket 196, rubber blanket fixing assembly 198, etc.

[0049] The number printing head 202 on the number roller 122 can be a mechanical number printing head or an electronically controlled number printing head.

[0050] The number printing heads 202 on the number cylinder 122 can be horizontal number heads or vertical number heads, or one horizontal number head and one vertical number head.

[0051] The small security code printing device 10 can realize horizontal number printing or vertical number printing, or a combination of horizontal number and vertical number printing.

[0052] The small security printing device 10 is suitable for a plastic substrate or a paper substrate.

[0053] The maximum size of the substrate applicable to the small-size securities printing device 10 is 165 mm×225 mm, and the minimum size is 45 mm×85 mm.

[0054] The applicable range of the substrate for the small-size securities printing equipment 10 is 70g / m 2 ~700g / m 2 .

[0055] The paper collecting unit 130 is used for collecting the printed substrate after printing.

[0056] Positioning method: The position of the substrate to be printed in the printing area is respectively positioned horizontally and vertically by the horizontal adjustment component 150 and the vertical adjustment component 170. Among them: the horizontal adjustment component 150 is located between the conveying unit I and the printing unit 120, and is composed of a positioning plate 152 and a guide plate 154. The substrate to be printed enters the horizontal positioning area through the guide plate 154 of the horizontal adjustment component 150 under the belt transmission of the conveying unit I, and the horizontal positioning of the substrate to be printed is achieved by adjusting the position and spacing of the two positioning plates 152; the vertical adjustment component 170 is located below the conveying unit I, and is composed of a push claw 172, a guide component, etc. When the substrate to be printed enters the horizontal positioning area and triggers the paper detection sensor 160, the push claw 172 of the vertical adjustment component 170 moves vertically according to a certain movement law and contacts with the rear end face of the substrate to be printed, and pushes the substrate to be printed into the printing unit 120 to achieve the horizontal positioning of the substrate to be printed.

[0057] Working principle: A small-sheet securities printing device 10 of the present embodiment includes a paper feed unit 110, a conveying unit 140, a longitudinal adjustment component 170, a transverse adjustment component 150, a printing unit 120 and a paper receiving unit 130. The working principle of the device is as follows: (1) During the printing process, the paper feed unit 110 delivers the substrate to be printed onto the conveying unit I; (2) The substrate to be printed moves to the transverse adjustment component 150 area through the conveying unit I, and the substrate is transversely positioned under the joint action of the guide plate 154 and the positioning plate 152. (3) When the substrate to be printed enters the transverse adjustment component 150 area and triggers the paper detection sensor 160, the push claw 172 of the longitudinal adjustment component 170 moves along the corresponding mechanism. Figure 3 The belt of the conveying unit I is rotated in the direction d1 shown in the figure, and moves along the belt of the conveying unit I according to a certain rule. Figure 3 The push claw 172 moves horizontally in the direction d2 shown; the push claw 172 contacts the rear end of the substrate to be printed and moves together until the substrate is pushed to the printing unit 120 area. (4) The printing unit 120 includes a number roller 122 and an impression roller 124. The substrate to be printed enters the predetermined printing position through the push claw 172, and the number printing is achieved under the joint action of the print head of the number roller 122 and the rubber blanket 196 of the impression roller 124. (5) The printed substrate enters the paper receiving unit 130 through the conveying unit II.

[0058] In this application, the terms "first", "second", and "third" are used for descriptive purposes only and are not to be understood as indicating or implying relative importance; the term "plurality" refers to two or more, unless otherwise expressly defined. Terms such as "installed", "connected", "connected", and "fixed" should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; "connected" can be a direct connection or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0059] In the description of the present application, it should be understood that the terms "upper", "lower", "rear", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation, and therefore, should not be understood as a limitation on the present application.

[0060] In the description of this specification, the description of the terms "one embodiment", "some embodiments", "specific embodiments", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0061] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A small-size securities printing device, characterized in that: include: A paper feeding unit (110), used for feeding a substrate to be printed; A printing unit (120) connected to the paper feeding unit (110), the printing unit (120) comprising a number roller (122) and an impression roller (124), the number roller (122) and the impression roller (124) being arranged vertically, the number roller (122) and the impression roller (124) moving in a circular motion towards each other, and the substrate to be printed is printed by entering a tangent area between the number roller (122) and the impression roller (124); A paper collection unit (130), connected to the printing unit (120), and used for collecting the substrate to be printed after printing; A conveying unit (140) is used to convey the substrate to be printed, the conveying unit (140) comprising a first conveying unit (142) and a second conveying unit (144), the first conveying unit (142) connecting the paper feeding unit (110) and the printing unit (120), and the second conveying unit (144) connecting the printing unit (120) and the paper receiving unit (130).

2. The small-size security printing device according to claim 1 is characterized in that: Also includes: A transverse adjustment component (150) is arranged between the first conveying unit (142) and the printing unit (120), and comprises two positioning plates (152) and a guide plate (154), wherein the guide plate (154) is located on one side of the positioning plate (152), and the two positioning plates (152) are movably arranged. The transverse adjustment component (150) is used to guide the substrate to be printed on the first conveying unit (142) into the transverse positioning area through the guide plate (154), and the transverse positioning of the substrate to be printed is achieved by adjusting the position and spacing of the two positioning plates (152).

3. The small-size security printing device according to claim 2 is characterized in that: Also includes: A paper detection sensor (160) is provided between the first conveying unit (142) and the printing unit (120); A longitudinal adjustment component (170) is disposed at the bottom of the first conveying unit (142), and comprises a push claw (172), wherein the push claw (172) is movably disposed, and is used for causing the push claw (172) to move longitudinally according to a preset movement rule and contact the rear end surface of the substrate to be printed when the substrate to be printed enters the transverse positioning area and triggers the paper detection sensor (160), thereby pushing the substrate to be printed into the printing unit (120) to achieve transverse positioning of the substrate to be printed.

4. The small-size security printing device according to claim 1 is characterized in that: The number roller (122) comprises a number roller shaft (184), a number print head fixing ring (186), a first number print head group (180) and a second number print head group (182); the first number print head group (180) comprises at least one number print head (202); the second number print head group (182) comprises at least one number print head (202); the first number print head group (180) and the second number print head group (182) are both fixed to the number roller shaft (184) via the number print head fixing ring (186).

5. The small-size security printing device according to claim 4 is characterized in that: The number print heads (202) of the first number print head group (180) include horizontal number print heads or vertical number print heads or a combination of horizontal numbers and vertical numbers, and the number print heads (202) of the second number print head group (182) include horizontal number print heads or vertical number print heads or a combination of horizontal numbers and vertical numbers.

6. The small-size security printing device according to claim 1 is characterized in that: The substrate to be printed includes a plastic substrate or a paper substrate.

7. The small-size security printing device according to claim 4 is characterized in that: The number printing head (202) of the first number printing head group (180) is a mechanical number printing head or an electronically controlled number printing head; and / or The number printing heads (202) of the second number printing head group (182) are mechanical number printing heads or electronically controlled number printing heads.

8. The small-size security printing device according to claim 3 is characterized in that: The number of the pushing claws (172) is one or more, and the plurality of pushing claws (172) are arranged at intervals at the bottom of the first conveying unit (142).

9. The small-size security code printing device according to any one of claims 1 to 8, characterized in that: The first conveying unit (142) comprises a first belt (210) and a first roller (212), the first belt (210) being wound around the first roller (212); and / or The second conveying unit (144) comprises a second belt (214) and a second roller (216), and the second belt (214) is wound around the second roller (216).

10. The small-size security code printing device according to claim 9, characterized in that: The number of the first rollers (212) is plural, and the plural first rollers (212) are arranged at intervals between the paper feeding unit (110) and the printing unit (120); and / or There are a plurality of second rollers (216), and the plurality of second rollers (216) are arranged at intervals between the printing unit (120) and the paper receiving unit (130).

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