A label printer

Abstract

The present invention discloses a label printer, comprising a housing and a cover body rotatably connected thereto, wherein the housing comprises a label roll mounting mechanism, an electric power mechanism and a print head assembly, and a rubber roller is provided on the cover body. When the cover body is buckled onto the housing, the rubber roller is connected to the electric power mechanism, and the rubber roller is arranged relative to the print head ceramic plate. The rubber roller realizes forward and reverse rotation under the action of the electric power mechanism, thereby completing the paper output and paper retraction of the label paper. The print head assembly comprises an anti-stuck component arranged on the paper outlet side of the print head ceramic plate, the edge of the anti-stuck component is arranged into a chamfered structure, and the chamfered structure protrudes more than the top of the print head ceramic plate on the label paper feeding channel. The present invention can avoid the defect of the die-cut label paper being scraped and unable to print normally when the paper is retracted by the anti-stuck component, greatly improve the success rate of paper retraction, solve the waste of exposed labels after installing label consumables, and reduce costs. In addition, the anti-foolproof setting of the core shaft assembly can ensure that the label roll is installed correctly, greatly improving the user experience.

Description

Technical Field

[0001] The present invention relates to the field of label printers, and in particular to a label printer. Background Art

[0002] Printers are now widely used in everyday life, including supermarkets, shopping malls, and homes. Printers are also becoming increasingly miniaturized, such as the price stampers used in supermarkets to print price tags and label printers used in homes to print personalized labels such as dates and logos. Existing thermal printers use a semiconductor heating element, such as a ceramic plate, installed on the print head. This heats the ceramic plate and brings it into contact with thermal printing paper to print the desired pattern. During the printing process, the paper is positioned between the ceramic plate and the rubber roller, which drives the paper. The printing surface of the paper can be considered a smooth plane. The contact surface between the paper and the rubber roller and the contact surface between the ceramic plate and the paper need to be parallel to each other in order to print a clear pattern on the paper.

[0003] When used to print die-cut labels, the right-angle edge at the top of the print head ceramic plate will cause the die-cut label to be scraped off when it is unrolled, causing the die-cut label to be peeled off from the base paper. The peeled die-cut surface paper will be squeezed and stacked between the rubber roller and the print head ceramic plate, eventually causing the rubber roller to jam, making it impossible to effectively unroll the paper and print effectively. This is the main reason why label printers on the market do not have a paper rewind function, resulting in waste of the exposed portion of the label paper.

[0004] In addition, the position optical coupler in the existing label printer is set on the paper inlet side of the print head. If the paper is retracted to the front side of the rubber roller, it cannot be ejected again, resulting in a poor user experience.

[0005] Furthermore, label rolls on the market typically have a core that passes through the roll, with retaining plates on either side to form a complete roll before being loaded into the machine. However, due to the identical structure on both sides of the roll, loading errors are common. For example, the roll can be inserted in such a way that the bottom surface of the roll comes into contact with the heat of the print head, resulting in printing problems. Alternatively, the roll can be loaded upside down, also causing printing problems. Furthermore, due to the lack of a retaining mechanism, the label paper can tilt after loading, resulting in inaccurate printing and poor quality.

[0006] Furthermore, to meet diverse needs, the same label printer often accommodates multiple sizes of label paper. Therefore, printing requires users to quickly identify the current label paper's specifications and model, which increases operational complexity and leads to a poor user experience. Repeated printing actions require repeated operation of the control terminal, making direct printing control impossible locally and cumbersome.

[0007] As can be seen, the existing label printers mentioned above still have inconveniences and defects in their structure, methods, and use, and are in urgent need of further improvement. The industry is currently striving to create a new label printer that can solve the problems of paper jams and label waste, automatically identify labels, and completely resolve the problem of incorrectly loaded label rolls, while also saving costs and simplifying operation. Summary of the Invention

[0008] The technical problem to be solved by the present invention is to provide a label printer that can solve the problem of paper feeding without jamming to avoid label waste, solve the problem of automatic machine identification of label paper, and completely solve the problem of incorrect loading of label paper rolls, save costs, and be easy to operate, thereby overcoming the shortcomings of existing label printers.

[0009] In order to solve the above technical problems, the present invention provides a label printer, comprising a shell and a cover body rotatably connected to the shell, the shell including a label roll mounting mechanism, an electric power mechanism and a print head assembly, the cover body is provided with a rubber roller, when the cover body is buckled on the shell, the rubber roller is connected to the electric power mechanism, and the rubber roller is arranged opposite to the print head ceramic plate of the print head assembly, the label paper passes between the rubber roller and the print head ceramic plate, and the rubber roller realizes forward and reverse rotation under the action of the electric power mechanism to complete the paper output and paper retraction of the label paper.

[0010] As a further improvement, the print head assembly includes an anti-stuck component arranged on the paper outlet side of the print head ceramic plate, and the edge of the anti-stuck component adjacent to the top of the print head ceramic plate is configured as a chamfered structure, and the chamfered structure protrudes more than the top of the print head ceramic plate on the label paper feed channel.

[0011] As a further improvement, the distance that the rounded corner structure protrudes from the top of the print head ceramic plate on the label paper feeding path is 0.1-1.0 mm.

[0012] As a further improvement, a photoelectric transmitter is provided on the cover body, and a photoelectric receiver cooperating with the photoelectric transmitter is provided inside the shell body. The photoelectric transmitter and the photoelectric receiver are respectively arranged on both sides of the label paper output channel on the rear end side of the rubber roller to realize the detection of the label paper.

[0013] As a further improvement, the electric power mechanism includes a motor and a gear transmission mechanism connected to the motor, and one end of the rubber roller is provided with a gear, which is engaged with the gear transmission mechanism of the electric power mechanism.

[0014] As a further improvement, a travel switch is provided on the bracket of the print head assembly, and the travel switch cooperates with the rubber roller on the cover body to detect the opening and closing of the cover body.

[0015] As a further improvement, an RFID tag reader is further provided inside the shell, and the RFID tag reader is arranged on the inner side of the shell corresponding to the RFID tag attached to the tag roll.

[0016] As a further improvement, the label roll installation mechanism includes a first fixing groove and a second fixing groove arranged relatively on the inner side of the shell, and the first fixing groove and the second fixing groove are asymmetrically arranged.

[0017] Further improvements include a core shaft assembly for installing a label roll, the core shaft assembly includes a core shaft and a first baffle, the first end and the second end of the core shaft adopt a snap-fit structure corresponding to the first fixing groove and the second fixing groove respectively, the core shaft includes a first anti-foolproof structure close to the first end and a second anti-foolproof structure close to the second end, the central through hole structure of the first baffle matches the first anti-foolproof structure, and the first baffle is arranged on the core shaft by an interference fit.

[0018] As a further improvement, the core shaft assembly further includes a second baffle connected to the second end side of the core shaft, and the middle through hole structure of the second baffle matches the second fool-proof structure.

[0019] As a further improvement, an RFID tag is attached to the outer side of the first baffle or the second baffle.

[0020] As a further improvement, the core shaft assembly further includes a stopper engaged with the first end portion of the core shaft, for preventing the first baffle from sliding out of the core shaft;

[0021] A partition plate is provided between the first fool-proof structure and the second fool-proof structure, and a buckle for engaging with the second blocking piece is provided on the second fool-proof structure.

[0022] As a further improvement, the first blocking piece or the second blocking piece includes a limiting extension portion, and the limiting extension portion extends to the lower portion of the rubber roller when the cover is in the buckled state.

[0023] Further improvements include a control main board connected to the electric power mechanism and the print head assembly, and control keys arranged on the shell and connected to the control main board, the control keys including a start button and a toggle push rod, the start button is used to issue a power-on instruction to the control main board by a long press, and is used to issue a paper feed or paper ejection instruction to the control main board by a short press, and the toggle push rod is used to issue a paper ejection or paper feed instruction to the control main board by toggling.

[0024] After adopting such a design, the present invention has at least the following advantages:

[0025] 1. The label printer of the present invention can avoid the defect of die-cut label paper being scraped off and unable to print normally when the paper is unloaded by setting an original anti-stuck component on the print head assembly, greatly improving the paper unloading success rate without affecting the paper output effect, solving the problem of waste of exposed labels after installing label consumables, and reducing costs.

[0026] 2. By setting up the photoelectric transmitter and the photoelectric receiver, the label paper detection mechanism is set at the rear end of the rubber roller, which can quickly realize the advance identification of paper feeding without consumables, and will not cause the problem of excessive paper feeding back to the rubber roller and being unable to output paper.

[0027] 3. The fool-proof setting of the core shaft assembly can also realize the fool-proof installation of the label roll. Whether it is the assembly of the label roll itself or the installation of the label roll in the machine, the setting of the fool-proof structure ensures that the label roll installation will not go wrong, simplifies the operation, and greatly improves the user experience.

[0028] 4. By attaching an RFID tag to the spindle assembly and installing an RFID reader inside the housing, the system can quickly and automatically identify the label roll's specifications, length, gap width, heating time, and other information. It then quickly matches the corresponding editing and printing interface, automatically calculating and intelligently matching heating information and paper feed volume to ensure accurate printing position and clear content, enabling preview of print effects and improving print quality. Furthermore, the control key setting greatly facilitates repeated printing of dates and prices in supermarkets and other locations. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The above is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0030] Figure 1 It is a structural schematic diagram of the label printer of the present invention with the cover body opened.

[0031] Figure 2 It is a schematic diagram of the longitudinal section structure of the label printer of the present invention.

[0032] Figure 3 It is a structural schematic diagram of the print head assembly in the label printer of the present invention.

[0033] Figure 4 It is a structural schematic diagram of the combination of the print head assembly and the anti-jamming component in the label printer of the present invention.

[0034] Figure 5 It is a schematic top view of the structure of the label printer of the present invention with the cover body opened.

[0035] Figure 6 It is a schematic structural diagram of the label printer of the present invention after the label roll is loaded.

[0036] Figure 7 It is a schematic diagram of the exploded structure of the label roll in the label printer of the present invention. DETAILED DESCRIPTION

[0037] Refer to the attached Figure 1 and 2 As shown, the label printer of this embodiment includes a housing 1 and a cover 2 rotatably connected to the housing 1. The housing 1 includes a label roll mounting mechanism, an electric power mechanism, and a print head assembly 3. A rubber roller 21 is provided on the cover 2. When the cover 2 is snapped onto the housing 1, the rubber roller 21 is connected to the electric power mechanism and is arranged opposite to the print head ceramic plate 31 of the print head assembly 3. The label paper passes between the rubber roller 21 and the print head ceramic plate 31. The rubber roller 21 is rotated forward and reversed under the action of the electric power mechanism to complete the paper output and paper withdrawal of the label paper.

[0038] In this embodiment, the housing 1 is composed of an upper and lower housing that snap together to form a cavity for accommodating a label roll 10, the printhead assembly 3, the electric drive mechanism, the control board 14, the battery 15, and other components. The top surface of the upper housing has a through hole for inserting the label roll 10 and for snapping the cover 2. The cover 2 is connected to one side of the upper housing via a pin. The battery 15 is secured by the curved rib structure of the upper and lower housings and provides power to the printer.

[0039] Refer to the attached Figure 3 As shown, the printhead assembly 3 and electric drive mechanism of this embodiment can utilize existing, mature products. They include a printhead ceramic plate 31, a printhead base plate 32, a leaf spring 33, a printhead bracket 34, a motor 35, and a gear transmission mechanism 36. One side of the printhead base plate 32 is connected to the printhead ceramic plate 31, and the other side is connected to the leaf spring 33, which is mounted on the sidewall of the printhead bracket 34. The leaf spring 33 provides thrust for the printhead ceramic plate 31, ensuring that the printhead ceramic plate adheres tightly to the label paper and remains parallel to the rubber roller 21. The motor 35 drives the gear transmission mechanism 36 to achieve power transmission. In this embodiment, a gear 22 is provided at one end of the rubber roller 21 on the cover 2. When the cover is engaged, the gear 22 meshes with the gear transmission mechanism 36, allowing the motor 35 to drive both forward and reverse rotation of the rubber roller 21. At the same time, after closing the cover 2, the rubber roller 21 is pressed by the springs at both ends of the print head assembly, and the leaf spring 33 behind the print head substrate 32 is also compressed, so that the rubber roller 21 and the print head ceramic plate 31 are tightly fitted together, ensuring that the contact surface between the label paper and the rubber roller 21 and the contact surface between the print head ceramic plate 31 and the label paper are in a parallel state, ensuring that a clear pattern is printed on the label paper.

[0040] In addition, a travel switch 37 is provided on the bracket of the print head assembly 3 , and the travel switch 37 cooperates with the rubber roller on the cover body 2 to detect whether the cover body 2 is opened or closed.

[0041] In a preferred embodiment, the print head assembly 3 includes an anti-stuck member 38 provided on the paper outlet side of the print head ceramic plate 31, as shown in the attached Figure 4 The edge of the anti-stuck member 38 adjacent to the top of the print head ceramic plate 31 is configured as a rounded structure, and the rounded structure protrudes from the top of the print head ceramic plate 31 on the label paper feeding path.

[0042] Preferably, the distance that the chamfered structure protrudes from the top of the print head ceramic plate on the label paper feeding channel is 0.1-1.0mm, more preferably 0.1-0.3mm. In this way, when the label paper is retracted, since the anti-stuck component protrudes from the top of the print head ceramic plate, the die-cut label paper can avoid the right-angled edge of the top of the print head ceramic plate and retract smoothly, thereby preventing the die-cut label on the label paper from being scraped off by the right-angled top of the print head ceramic plate 31 during retraction, causing the die-cut label to peel off from the base paper, resulting in the label paper being squeezed and piled up, and unable to print normally. Moreover, the setting of the chamfered structure of the anti-stuck component allows the die-cut label paper to be ejected smoothly when feeding, and the die-cut label will not be peeled off. The setting of the anti-stuck component 38 greatly improves the success rate of paper retraction of the label printer, completely solves the problem that the existing label printer cannot retract paper, and allows the unprinted labels exposed outside the machine to be smoothly returned to the inside of the machine, reducing label waste.

[0043] Specifically, the anti-stuck component 38 includes a fixed plate 381 with the same length as the print head substrate 32 and an extension plate 382 perpendicular to the fixed plate 381. The extension plate 382 extends to the upper end of the print head ceramic plate 31, and the edge of the extension plate is set to the chamfered structure.

[0044] A plurality of vertical reinforcing ribs 383 are provided between the fixing plate 381 and the extension plate 382 to ensure the stability of the anti-jamming member. Fixing legs 384 are provided at both ends of the extension plate 382 and the fixing plate 381. The fixing legs 384 are inserted into the print head assembly to secure the anti-jamming member.

[0045] Refer to the attached Figure 2 As shown, in this embodiment, the cover 2 is provided with a photoelectric transmitter 23, and the housing 1 is provided with a photoelectric receiver 13 that cooperates with the photoelectric transmitter 23. The photoelectric transmitter 23 and the photoelectric receiver 13 constitute a label paper detection mechanism, which is respectively located on either side of the label paper discharge channel at the rear end of the rubber roller 21 to detect the presence of label paper and the gap between die-cut labels. Because the label paper detection mechanism is located at the rear end of the rubber roller, it can quickly and preemptively identify paper feed material shortages, preventing the problem of excessive paper feed being blocked by the rubber roller and unable to be discharged.

[0046] In order to achieve miniaturization of the label printer, in this embodiment, the fixing plate 381 of the anti-stuck component 38 is provided with an escape opening 385 for allowing the photoelectric emitting component 23 and the photoelectric receiving component 13 to pass through.

[0047] In this embodiment, the label printer further includes a core shaft assembly for mounting the label roll 10 , wherein the core shaft assembly includes a core shaft 4 , a first baffle 5 and a second baffle 6 .

[0048] In this embodiment, the second baffle 6 can be installed on one side of the label roll 10. Specifically, the second baffle 6 can be secured to the core of the label roll 10 through an interference fit and sold separately as a single label roll. To facilitate identification of the label roll 10, an RFID tag 7 is affixed to the outside of the second baffle 6 in this embodiment. The RFID tag 7 contains information such as the label material's specifications, length, gap width, and heating time, facilitating rapid identification of the label material using an RFID reader.

[0049] In order to ensure accurate installation of the label roll, the core shaft assembly is provided with a foolproof design. The foolproof design is a preventive and corrective behavioral restraint method that uses a restrictive method to avoid errors, allowing the operator to directly and accurately complete the correct operation without expending attention, experience, or professional knowledge. Specifically, the first end 41 and the second end 42 of the core shaft 4 described in this embodiment adopt an asymmetric foolproof structure. For example, the width of the first end 41 is larger than the width of the second end 42, and the first end 41 is configured to be larger at the top and smaller at the bottom, which facilitates the identification of the left and right and up and down directions of the label roll consumables.

[0050] Correspondingly, the label roll mounting mechanism inside the housing 1 in this embodiment includes a first fixing groove 11 and a second fixing groove 12 that respectively engage with the first end 41 and the second end 42. Figure 5 As shown, the width of the first fixing slot 11 is larger than the width of the second fixing slot 12, so as to solve the problem that the label roll 10 is placed upside down.

[0051] The foolproof design is also as follows: Figure 6 and 7 As shown, the core shaft 4 includes a first foolproof structure 43 near the first end 41 and a second foolproof structure 44 near the second end 42. The central through-hole structure of the first baffle 5 matches the first foolproof structure 43, and the middle through-hole structure of the second baffle 6 matches the second foolproof structure 44. In this embodiment, the specific structural arrangement of the first and second foolproof structures can be composed of axial ribs of different widths or different gaps, as long as the baffle and the core shaft are matched at a single angle, achieving the goal of precise installation of the baffle.

[0052] To secure the baffle 5 to the core shaft, the first baffle 5 is positioned on the core shaft 4 via an interference fit. This allows the first baffle 5 to be positioned at any position on the core shaft 4, depending on the width of the label roll 10. This allows for positioning of label rolls of varying widths, expanding the applicability of label paper. To prevent the first baffle 5 from slipping off the core shaft 4, the core shaft assembly further includes a retaining member 8, such as a screw, that engages with the first end of the core shaft.

[0053] A partition plate 45 is provided between the first foolproof structure 43 and the second foolproof structure 44. The second foolproof structure 44 is provided with a buckle 46 for engaging with the second baffle 6. When the second baffle 6 is installed in the second foolproof structure 44, the partition plate 45 and the buckle 46 secure the second baffle 6 to the core shaft 4, thereby securing the baffle.

[0054] In order to ensure that the label paper is pulled into the paper feed path without being skewed when the label roll is applied to the inside of the printer housing, the first baffle 5 also includes a limiting extension portion 51 extending in the plane, and the limiting extension portion 51 extends to the lower part of the rubber roller 21 when the cover body 2 is in the buckled state.

[0055] Of course, in this embodiment, the second blocking piece 6 may also include a limiting extension portion similar to the limiting extension portion 51 to further ensure that the label paper is not skewed when feeding.

[0056] In addition, in this embodiment, an RFID tag reader is also provided inside the shell 1. The RFID tag reader is arranged on the inner side of the shell 1 corresponding to the RFID tag affixed to the label roll, and is used to quickly identify the authenticity and related information of the label roll consumables, so that the printer can quickly match the corresponding editing and printing interface, automatically calculate and intelligently match the heating information and paper feed amount to ensure that the printing position is accurate and the content is clear, and the printing effect preview is realized to improve the printing effect and printing quality.

[0057] The label printer of this embodiment further includes a control board 14 connected to the electric power mechanism and print head assembly, and control keys disposed on the housing 1 and connected to the control board 14. The control keys include a start button 17 and a toggle lever 18. The start button 17 is used to issue a power-on instruction to the control board 14 by a long press, and to issue a paper feed instruction to the control board 14 by a short press. The toggle lever 18 is used to issue a paper eject instruction to the control board 14 by toggling. Of course, the control keys can change the type of instruction issued according to actual needs.

[0058] To use the label printer of this embodiment, after installing the label roll 10 according to the foolproofing settings, close the cover 2 and long-press the start button 17 to turn it on. When printing begins, if a label is exposed, pushing the push rod 18 once will cause the machine to retract one label. If multiple labels are exposed, each push of the push rod 18 retracts one label, thus eliminating wasted labels. If no labels are exposed, briefly pressing the start button 17 will restart printing from the first label in the consumables. To repeat a label after printing, simply click the start button 17 once to repeat the previous print, greatly facilitating repeated printing of dates and prices in supermarkets and other locations.

[0059] In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "back", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limiting the present invention.

[0060] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0061] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any form. Those skilled in the art can make some simple modifications, equivalent changes or modifications based on the technical content disclosed above, which all fall within the scope of protection of the present invention.

Claims

1. A label printer, characterized in that: The device comprises a housing and a cover rotatably connected to the housing, wherein the housing includes a label roll mounting mechanism, an electric power mechanism, and a print head assembly. The cover is provided with a rubber roller. When the cover is buckled onto the housing, the rubber roller is connected to the electric power mechanism and is arranged opposite to the print head ceramic plate of the print head assembly. The label paper passes between the rubber roller and the print head ceramic plate. The rubber roller is rotated forward and reversely under the action of the electric power mechanism to complete the paper feeding and unfeeding of the label paper. The print head assembly includes an anti-stuck member disposed on the paper outlet side of the print head ceramic plate, wherein the edge of the anti-stuck member adjacent to the top of the print head ceramic plate is configured to be a rounded structure, and the rounded structure protrudes from the top of the print head ceramic plate on the label paper feeding path; The anti-stuck component includes a fixed plate and an extension plate vertically connected thereto, the extension plate extending to the upper end of the print head ceramic plate, the edge of the extension plate being configured as the rounded structure, fixed legs being provided at both ends of the extension plate and the fixed plate, the fixed legs being connected to the print head assembly, a plurality of vertical reinforcing ribs being provided between the fixed plate and the extension plate, and a notch being provided on the fixed plate for allowing a label paper detection mechanism to pass through; The cover body is provided with a photoelectric transmitter, and the shell body is provided with a photoelectric receiver that cooperates with the photoelectric transmitter. The photoelectric transmitter and the photoelectric receiver are respectively arranged on both sides of the label paper outlet channel on the rear end side of the rubber roller to realize the detection of the label paper.

2. The label printer according to claim 1, wherein: The distance that the rounded corner structure protrudes from the top of the print head ceramic plate on the label paper feeding path is 0.1-1.0 mm.

3. The label printer according to claim 1, wherein: The electric power mechanism includes a motor and a gear transmission mechanism connected to the motor. One end of the rubber roller is provided with a gear, and the gear is meshed with the gear transmission mechanism of the electric power mechanism.

4. The label printer according to claim 1, wherein: A travel switch is provided on the bracket of the print head assembly, and the travel switch cooperates with the rubber roller on the cover body to detect the opening and closing of the cover body.

5. The label printer according to claim 1, wherein: An RFID tag reader is also provided inside the shell, and the RFID tag reader is arranged on the inner side of the shell corresponding to the RFID tag attached to the tag roll.

6. The label printer according to any one of claims 1 to 5, characterized in that: The label roll installation mechanism includes a first fixing groove and a second fixing groove arranged opposite to each other on the inner side of the shell, and the first fixing groove and the second fixing groove are asymmetrically arranged.

7. The label printer according to claim 6, characterized in that: It also includes a core shaft assembly for installing a label roll, the core shaft assembly includes a core shaft and a first baffle, the first end and the second end of the core shaft adopt a snap-fit structure corresponding to the first fixing groove and the second fixing groove respectively, the core shaft includes a first anti-foolproof structure near the first end and a second anti-foolproof structure near the second end, the central through hole structure of the first baffle matches the first anti-foolproof structure, and the first baffle is arranged on the core shaft by an interference fit.

8. The label printer according to claim 7, wherein: The core shaft assembly further includes a second baffle connected to the second end side of the core shaft, and the middle through-hole structure of the second baffle matches the second fool-proof structure.

9. The label printer according to claim 8, characterized in that: An RFID tag is attached to the outer side of the first baffle or the second baffle.

10. The label printer according to claim 8, characterized in that: The spindle assembly further includes a stopper engaged with the first end portion of the spindle, for preventing the first baffle from sliding out of the spindle; A partition plate is provided between the first fool-proof structure and the second fool-proof structure, and a buckle for engaging with the second blocking piece is provided on the second fool-proof structure.

11. The label printer according to claim 10, characterized in that: The first blocking piece or the second blocking piece includes a position-limiting extension portion, and the position-limiting extension portion extends to the lower portion of the rubber roller in the buckled state of the cover body.

12. The label printer according to any one of claims 1 to 5, characterized in that: It also includes a control main board connected to the electric power mechanism and the print head assembly, and control keys arranged on the shell and connected to the control main board, the control keys including a start button and a toggle push rod, the start button is used to issue a power-on instruction to the control main board by long pressing, and is used to issue a paper feed or paper ejection instruction to the control main board by short pressing, and the toggle push rod is used to issue a paper ejection or paper feed instruction to the control main board by toggling.

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