Printer

Abstract

The utility model discloses a printer which comprises a support, a sliding assembly, a paper blocking plate, a printer assembly and a circuit board, the paper blocking plate reciprocates in the first direction, the printing assembly and the sliding assembly are spaced in the second direction, and a first connecting line of the printing assembly is connected with a first wiring end on the circuit board. The circuit board is arranged on the side, facing the printing assembly, of the sliding assembly to separate the first connecting line from the sliding assembly, so that the first connecting line is difficult to interfere with the sliding assembly, and the sliding stability of the sliding assembly is ensured.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of printing technology, and in particular to a printer. BACKGROUND

[0002] In the related art, many lines in the printer need to be connected with the circuit board to realize normal communication interaction. However, the printer is provided with a paper stop plate and a sliding assembly for driving the paper stop plate to slide. The sliding assembly is sliding, and thus the lines in the printer can easily affect the sliding of the sliding assembly. CONTENT OF THE UTILITY MODEL

[0003] The embodiments of the present application provide a printer, which can solve the problem that the lines connected with the circuit board in the printer can easily affect the sliding of the sliding assembly.

[0004] In a first aspect, the embodiments of the present application provide a printer, which is characterized by comprising:

[0005] a support, the support being provided with a sliding groove extending along a first direction;

[0006] a sliding assembly, the sliding assembly being arranged on the support;

[0007] a paper stop plate, the paper stop plate being connected with the sliding assembly through the sliding groove, so that the paper stop plate can reciprocate relative to the support along the first direction;

[0008] a printing assembly, the printing assembly being mounted on the support, the printing assembly being spaced apart from the sliding assembly along a second direction, the first direction being perpendicular to the second direction, the printing assembly comprising a first connecting line;

[0009] a circuit board, the circuit board being connected with the support, the circuit board being provided with a first wiring end, the first wiring end being connected with the first connecting line;

[0010] In the second direction, the circuit board is arranged on a side of the sliding assembly facing the printing assembly, so as to separate the first connecting line from the sliding assembly.

[0011] In some embodiments, in the second direction, the sliding assembly and the printing assembly are located on two sides of the circuit board.

[0012] In some embodiments, the first wiring end is located on a side of the circuit board facing the printing assembly.

[0013] In some embodiments, the circuit board is arranged extending along a third direction, and the first direction, the second direction and the third direction are perpendicular to each other.

[0014] In some embodiments, the circuit board is spaced apart from the sliding assembly by a distance h1 in the third direction, and h1 satisfies 0.5mm≤h1≤3mm.

[0015] In some embodiments, the printer further comprises a micro switch and a second connecting line, the micro switch is arranged on the support and is spaced apart from the sliding assembly in the second direction, the circuit board is electrically connected to the micro switch through the second connecting line, and the circuit board determines the opening and closing of the cover according to the micro switch.

[0016] In the second direction, the micro switch is arranged on the side of the sliding assembly facing the printing assembly, so as to separate the second connecting line from the sliding assembly.

[0017] In some embodiments, the second connecting line is connected to the first connecting line and is electrically connected to the first connecting line.

[0018] In some embodiments, the printer further comprises a first sensor and a third connecting line, the first sensor is arranged on the support and is spaced apart from the sliding assembly in the second direction, the circuit board is electrically connected to the first sensor through the third connecting line, and the first sensor is used to detect the position of the label paper.

[0019] In the second direction, the first sensor is arranged on the side of the sliding assembly facing the printing assembly, so as to separate the third connecting line from the sliding assembly.

[0020] In some embodiments, the third connecting line is connected to the first connecting line and is electrically connected to the first connecting line.

[0021] In some embodiments, the printer comprises a host and a cover, the support is arranged on the host, the cover is rotationally connected to the host, a second sensor is arranged on the cover, the second sensor is connected to a fourth connecting line, the circuit board is electrically connected to the second sensor through the fourth connecting line, and the second sensor is used to detect the position of the label paper.

[0022] The fourth connecting line is arranged on the edge of the host and the cover, and part of the fourth connecting line is spaced apart from the sliding assembly in the first direction.

[0023] In some embodiments, the circuit board has a second connecting terminal connected to the fourth connecting line, and the second connecting terminal is spaced apart from the sliding assembly by a distance h2 in the first direction, and h2 satisfies 0cm≤h2≤2cm.

[0024] In some embodiments, the second terminal is located at an edge of the circuit board along the first direction.

[0025] In some embodiments, the circuit board comprises a first circuit board and a second circuit board, the first terminal is arranged on the first circuit board, the second circuit board is electrically connected to the first circuit board through a fifth connecting line, a control button is arranged on the bracket, and the second circuit board performs device management on the printer according to the control button.

[0026] In some embodiments, the printer further comprises a battery, the battery is arranged on the bracket, and the battery is arranged on two sides of the first circuit board along the thickness direction of the first circuit board respectively.

[0027] In some embodiments, the fifth connecting line is located on a side of the first circuit board away from the sliding assembly.

[0028] The printer based on the embodiments of the present application comprises a bracket, a sliding assembly, a paper stop plate, a printer assembly, and a circuit board. The paper stop plate reciprocates along a first direction, the printer assembly is spaced apart from the sliding assembly along a second direction, a first connecting line of the printer assembly is connected to a first terminal on the circuit board, and the circuit board is arranged on a side of the sliding assembly facing the printer assembly in the second direction to separate the first connecting line from the sliding assembly. In this way, the first connecting line is less likely to interfere with the sliding assembly, thereby ensuring the stability of the sliding assembly during sliding. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the drawings needed in the embodiments or prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0030] Figure 1 The structural schematic diagram of the printer provided by the embodiments of the present application is shown.

[0031] Figure 2 The structural schematic diagram of the first perspective of the internal structure of the printer provided by the embodiments of the present application is shown.

[0032] Figure 3 The structural schematic diagram of the second perspective of the internal structure of the printer provided by the embodiments of the present application is shown.

[0033] Figure 4 The structural schematic diagram of the third perspective of the internal structure of the printer provided by the embodiments of the present application is shown.

[0034] Figure 5A structural schematic diagram of a fourth view angle inside the printer is provided for the embodiments of the present application.

[0035] Reference numerals in the drawings:

[0036] 10, host; 20, cover;

[0037] 100, support; 100a, sliding groove; 101, control button;

[0038] 200, sliding assembly;

[0039] 300, paper stop plate;

[0040] 400, printing assembly; 401, first connecting line;

[0041] 500, circuit board; 510, first circuit board; 520, second circuit board; 521, fifth connecting line; 501, first connecting terminal; 502, second connecting terminal;

[0042] 600, micro switch; 601, second connecting line;

[0043] 700, first sensor; 701, third connecting line;

[0044] 800, second sensor; 801, fourth connecting line;

[0045] 900, battery;

[0046] XX, first direction; YY, second direction; ZZ, third direction. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solutions and advantages of the present application more clear, the present application is further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0048] In the prior art, there are many lines in the printer that need to be connected with the circuit board to realize normal communication interaction. However, the printer is provided with a paper stop plate and a sliding assembly for driving the paper stop plate to slide. The sliding assembly is sliding, so the lines in the printer can easily affect the sliding of the sliding assembly.

[0049] In order to solve the above technical problems, please refer to Figures 1-2 The present application provides a printer, which comprises a support 100, a sliding assembly 200, a paper stop plate 300, a printing assembly 400 and a circuit board 500.

[0050] The main function of the printer is to print information such as documents and pictures from a computer or other digital devices onto paper or other media for users to view or save. The printer can be an inkjet printer, a laser printer, a thermal printer, or a thermal transfer printer. The present application does not limit the type of printer, and the example used is a thermal transfer printer, specifically a label thermal transfer printer.

[0051] The thermal transfer printer uses thermal transfer technology to transfer images or text from special thermal transfer paper or carbon tape to label paper, providing high-quality color images and durable adhesion.

[0052] The bracket 100 serves as the main frame of the device, providing structural support and spatial layout, ensuring the stability and durability of the printer, allowing it to work normally in various environments.

[0053] The sliding assembly 200 is usually used to support and adjust the position of the paper stop plate 300, allowing the paper stop plate 300 to slide smoothly in a specific direction to meet different printing needs.

[0054] The main function of the paper stop plate 300 is to prevent paper displacement or disorder during printing, i.e., it can limit the label paper. Generally, two paper stop plates 300 are provided, and the two paper stop plates 300 are arranged opposite to each other along the first direction XX. It should be understood that a sliding groove 100a extending along the first direction XX is formed on the bracket 100, and the paper stop plate 300 is connected to the sliding assembly 200 through the sliding groove 100a. The paper stop plate 300 can usually be adjusted in the first direction XX by the sliding assembly 200 to adapt to different sizes of paper.

[0055] The printing assembly 400 is installed on the bracket 100, and the printing assembly 400 is the core component of the printer, responsible for the actual printing task. The printing assembly 400 includes a first connecting line 401 that can receive instructions to transfer images or text on thermal transfer paper or carbon tape to label paper. It can be understood that the first connecting line 401 can also conduct electricity to enable the printing assembly 400 to convert electrical energy into thermal energy.

[0056] The circuit board 500 is connected to the bracket 100, and the circuit board 500 is the control center of the printer, responsible for receiving and processing instructions from a computer or other devices, and converting these instructions into a format that the printer can understand. The circuit board 500 is provided with a first wiring end 501, which is connected to the first connecting line 401, i.e., the circuit board 500 can control the printing of the printing assembly 400.

[0057] In the embodiment of the present application, the printing assembly 400 is spaced apart from the sliding assembly 200 along the second direction YY, and the circuit board 500 is arranged on the side of the sliding assembly 200 facing the printing assembly 400 in the second direction YY to separate the first connecting line 401 from the sliding assembly 200. By arranging the first direction XX perpendicular to the second direction YY, the possibility of interference between the first connecting line 401 and the sliding assembly 200 can be avoided, thereby ensuring the smoothness of the sliding of the sliding assembly 200.

[0058] The first direction XX can be the width direction of the printer or the length direction of the printer. In an embodiment, the first direction XX is taken as the width direction of the printer, and the second direction YY is taken as the height direction of the printer, which refers to the height direction of the printer in the normal use state, also referred to as the vertical direction.

[0059] Based on the miniaturization and lightweight design of the printer and the complex functions required to be integrated in the printer, in an embodiment, referring to Figure 2 , the circuit board 500 includes a first circuit board 510 and a second circuit board 520. The first connecting terminal 501 is arranged on the first circuit board 510. The second circuit board 520 is electrically connected to the first circuit board 510 through a fifth connecting line 521. The support 100 is provided with a control button 101. The second circuit board 520 performs equipment management on the printer according to the control button 101.

[0060] Specifically, the second circuit board 520 can control the power-on and power-off of the printer and implement the instructions sent by the printer through the control button 101.

[0061] Through the design of the first circuit board 510 and the second circuit board 520, the extension of a single circuit board 500 in a certain direction does not excessively occupy the space of the printer, and the space inside the printer can be more effectively utilized. That is, the positions of various components can be more flexibly arranged in limited space, thereby optimizing the overall structure of the printer.

[0062] Referring to Figure 2 , the printer further includes a battery 900. The battery 900 is arranged on the support 100. The battery 900 provides power for the entire printer to ensure the normal printing of the printer. The battery 900 is arranged on both sides of the first circuit board 510 along the thickness direction of the first circuit board 510 and the second circuit board 520, respectively. This layout fully utilizes the three-dimensional space inside the printer. The battery 900, the first circuit board 510 and the second circuit board 520 are stacked in the thickness direction of the first circuit board 510, thereby reducing the floor area of the printer in the horizontal direction and facilitating the miniaturization design of the printer.

[0063] The battery 900 is placed on the bracket 100, and is distributed with the circuit board 500 in the thickness direction of the first circuit board 510, which helps to achieve the weight balance of the printer. This can reduce the shaking or tilting of the printer during use, improve the stability and accuracy of printing.

[0064] It needs to be understood that, since the weight of the battery 900 is generally heavy, it is generally arranged at the bottom of the inside of the printer, so the thickness direction of the first circuit board 510 can also be the vertical direction, and the battery 900 is arranged below the circuit board 500, which can be more easily connected with the bracket 100, improving the convenience of connection.

[0065] In another embodiment, please refer to Figure 2 The fifth connecting line 521 is located on the side of the first circuit board 510 away from the sliding assembly 200, which can make the layout inside the printer more compact and orderly. By placing the fifth connecting line 521 on one side of the circuit board 500, the space can be more effectively utilized, avoiding confusion and congestion of internal structures. This helps to maintain the structural integrity and stability of the printer.

[0066] And the fifth connecting line 521 and the sliding assembly 200 are located on opposite sides of the first circuit board 510, which can also reduce the interference between the fifth connecting line 521 and the sliding assembly 200, ensuring the smoothness of the sliding assembly 200 when sliding.

[0067] Optionally, please refer to Figures 2-3 In an embodiment, in the second direction YY, the sliding assembly 200 and the printing assembly 400 are located on both sides of the circuit board 500, which can more effectively utilize the space, so that the first connecting line 401 from the circuit board 500 to the printing assembly 400 can be more directly connected without bypassing other components, which helps to shorten the total length of the first connecting line 401, thereby reducing the attenuation and interference in the signal transmission process, improving the printing quality and stability, and also saving materials.

[0068] In addition, by locating the sliding assembly 200 and the printing assembly 400 on both sides of the circuit board 500, the bending degree of the first connecting line 401 can be reduced, reducing the stress caused by bending and prolonging the service life of the first connecting line 401.

[0069] In an embodiment, the first connecting terminal 501 is located on the side of the circuit board 500 facing the printing assembly 400, and the first connecting line 401 between the printing assembly 400 and the circuit board 500 can be more directly connected without bypassing other components or complex wiring, which significantly shortens the length of the connecting line, reduces the attenuation and delay in the signal transmission process, and thus improves the printing quality and response speed.

[0070] The first terminal 501 is directly arranged on the side of the circuit board 500 facing the printing assembly 400, which can greatly simplify the wiring process, reduce the wiring complexity, and improve the reliability and maintainability of the overall structure.

[0071] Referring to Figure 4 , the circuit board 500 is arranged along a third direction ZZ, and the first direction XX, the second direction YY, and the third direction ZZ are perpendicular to each other, i.e., the circuit board 500 is flexibly laid out in a three-dimensional space, so that the internal space of the printer can be more effectively utilized.

[0072] When the first direction XX is the width direction of the printer, and the second direction YY is the height direction of the printer, the third direction ZZ can be understood as the length direction of the printer, i.e., the horizontal direction, so that the vertical space can be more effectively utilized, which is helpful for the compactness of the overall structure of the printer, especially in application scenarios where the height of the printer needs to be limited.

[0073] Further, along the third direction ZZ, the distance between the circuit board 500 and the sliding assembly 200 is h1, which satisfies: 0.5mm≤h1≤3mm, i.e., h1 can be 0.5mm, 1mm, 2mm, 3mm or any range between any two of them, by h1 being in the above range, sufficient space is provided for the installation of the circuit board 500. This ensures that the circuit board 500 will not be damaged due to close contact with the sliding assembly 200 during installation, and also provides sufficient operating space for connectors, elements, etc. on the circuit board 500, facilitating installation and disassembly.

[0074] In addition, the occupation of the internal space of the printer is effectively controlled, i.e., the layout of other components such as the print head, ink cartridge, paper channel, etc. can be optimized in a limited space, which facilitates the miniaturization and light weight of the entire printer.

[0075] Optionally, referring to Figure 3 , the printer further comprises a micro switch 600 and a second connecting line 601, the micro switch 600 is arranged on the bracket 100 and is spaced apart from the sliding assembly 200 along the second direction YY, and the circuit board 500 is electrically connected to the micro switch 600 through the second connecting line 601, and the circuit board 500 determines the opening and closing of the printer cover 20 according to the micro switch 600, wherein, along the second direction YY, the micro switch 600 is arranged on the side of the sliding assembly 200 facing the printing assembly 400, so as to separate the second connecting line 601 from the sliding assembly 200.

[0076] The micro switch 600 is arranged on the side of the sliding assembly 200 facing the printing assembly 400, and the circuit board 500 is also arranged on the side of the sliding assembly 200 facing the printing assembly 400, so that the second connecting line 601 connecting the micro switch 600 and the circuit board 500 is also separated from the sliding assembly 200, so that the wiring inside the printer is more tidy, that is, the second connecting line 601 is difficult to interfere with the sliding assembly 200, which not only improves the reliability of the circuit connection, but also ensures the smoothness of the sliding assembly 200.

[0077] In the foregoing, please refer to Figure 3 The second connecting line 601 is connected to the first connecting line 401 and is electrically connected to the first connecting line 401, so that the setting of the wiring terminal and the wiring interface on the circuit board 500 can be reduced, which not only optimizes the layout and makes the entire printer structure more compact, but also reduces the cost.

[0078] The first connecting line 401 can be a FPC (Flexible Printed Circuit), and the second connecting line 601 is also a FPC, that is, the first connecting line 401 and the second connecting line 601 can be an integrally formed structure, and the FPC itself has the characteristics of being light and thin and bendable, which facilitates the connection of the circuit board 500 with the micro switch 600 and the printing assembly 400.

[0079] In an embodiment of the present application, please refer to Figure 3 The printer further comprises a first sensor 700 and a third connecting line 701, the first sensor 700 is arranged on the bracket 100, and the circuit board 500 is electrically connected to the first sensor 700 through the third connecting line 701, and the first sensor 700 is used to detect the position of the label paper.

[0080] The main function of the first sensor 700 is to detect the position of the label paper, and through the cooperation with the circuit board 500, the first sensor 700 can obtain the state information of the label paper in real time and transmit the information to the control unit on the circuit board 500.

[0081] The first sensor 700 can be used to detect the starting position of the label paper, the moving position of the label paper, the ending position of the label paper, and the gap detection between the bottom paper and the face paper of the label paper, and the specific functions of the first sensor 700 are not described here, which can be set according to the actual situation.

[0082] The first sensor 700 is arranged along the second direction YY away from the sliding assembly 200, and in the second direction YY, the first sensor 700 is arranged on the side of the sliding assembly 200 facing the printing assembly 400, so as to separate the third connecting line 701 from the sliding assembly 200, that is, the space inside the printer can be effectively utilized, and the interference between the third connecting line 701 and the sliding assembly 200 is avoided.

[0083] In addition, the circuit board 500 is also arranged on the side of the sliding assembly 200 facing the printing assembly 400, so that the third connecting line 701 connected with the first sensor 700 can be directly connected without bypassing other assemblies, which helps to shorten the total length of the third connecting line 701, thereby reducing the attenuation and interference in the signal transmission process, improving the printing quality and stability, saving materials, and making the wiring inside the printer more tidy and reducing the risk of failure caused by disordered wiring.

[0084] Further, the third connecting line 701 is connected to the first connecting line 401 and electrically connected with the first connecting line 401, so that the setting of the wiring terminal and the wiring interface on the circuit board 500 can be reduced, which not only optimizes the layout and makes the structure of the entire printer more compact, but also reduces the cost.

[0085] In addition, the third connecting line 701 can also be an FPC, and in the case that the first connecting line 401 is an FPC, that is, the first connecting line 401 and the third connecting line 701 can be an integrally formed structure, the FPC itself has the characteristics of thinness and bendability, which facilitates the connection between the circuit board 500 and the first sensor 700.

[0086] It can be understood that, referring to Figure 1 , the printer generally includes a host 10 and a cover 20, the bracket 100 is arranged on the host 10, and the cover 20 is rotationally connected to the host 10, so that the cover 20 has an open cover position and a closed cover position. In the open cover state, the paper compartment of the printer can be exposed, which is convenient for users to replace paper or check and maintain, and in the closed cover position, the paper compartment can be closed to ensure normal printing of the label paper.

[0087] In addition, referring to Figure 3 , the cover 20 is provided with a second sensor 800, the second sensor 800 is connected with a fourth connecting line 801, and the circuit board 500 is electrically connected with the second sensor 800 through the fourth connecting line 801. The second sensor 800 is used for detecting the position of the label paper, and in the embodiment of the application, the second sensor 800 is used for label paper out-of-paper detection.

[0088] The second sensor 800 monitors the conveying path of the label paper, ensuring that the paper moves correctly (paper out) during printing or is accurately returned (paper back) when needed, i.e., a signal can be sent to the controller to allow the printing assembly 400 to start working when the paper is detected to reach a preset position (such as the printing start point), and the second sensor 800 triggers an alarm and stops printing if the label paper is not detected (such as paper jam or no paper).

[0089] In the embodiment of the present application, since the fourth connecting line 801 is to be connected to the second sensor 800 on the circuit board 500 of the host 10 and the cover 20, the fourth connecting line 801 is arranged at the edge of the host 10 and the cover 20, and part of the fourth connecting line 801 is arranged apart from the sliding assembly 200 along the first direction XX.

[0090] Arranging the fourth connecting line 801 along the edge can more effectively utilize the space and avoid conflicts with other components inside the printer, and since the fourth connecting line 801 is spaced apart from the sliding assembly 200, the sliding assembly 200 is difficult to interfere with the fourth connecting line 801 even in the sliding state, ensuring stable operation of the printer.

[0091] The edge arrangement allows the connecting line to have a certain degree of freedom when the cover 20 is opened or closed, and will not be damaged due to excessive bending or stretching, enabling smoother opening and closing of the cover 20.

[0092] Further, referring to Figure 5 , the circuit board 500 has a second connecting terminal 502 connected to the fourth connecting line 801, and along the first direction XX, the second connecting terminal 502 is spaced apart from the sliding assembly 200 by a distance h2, which satisfies: 0cm≤h2≤2cm, where h2 can be 0.1cm, 0.5cm, 1cm, 2cm or any range between any two of the above, by h2 being in the above range, the fourth connecting line 801 connected to the second connecting terminal 502 and the sliding assembly 200 have sufficient spacing, reducing the possibility of interference between the two, and secondly, the entire printer structure can be compact, enabling lightweight and small design of the printer.

[0093] Further, referring to Figure 3 , the second connecting terminal 502 is located at the edge of the circuit board 500 along the first direction XX, which allows the fourth connecting line 801 to be drawn from the edge of the circuit board 500, avoiding complex wiring inside the circuit board 500. This not only makes the wiring more neat and orderly, but also optimizes the space utilization inside the circuit board 500, which helps to maintain the compactness of the internal structure of the printer.

[0094] In addition, the edge arrangement makes the second terminal 502 and the connecting wire connected thereto more easily accessible and operable. When connecting, disconnecting or replacing the connecting wire, the technician can more conveniently access these components, reducing the operation difficulty and maintenance cost.

[0095] The same or similar reference numerals in the drawings of the embodiments correspond to the same or similar components; in the description of the present application, it is understood that if the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right" and the like are based on the orientations or positional relationships shown in the drawings, they are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore the terms describing the positional relationships in the drawings are only used for exemplary illustration, and cannot be understood as a limitation on the present patent, for those skilled in the art, the specific meanings of the above terms can be understood according to the specific circumstances.

[0096] The above only describes the preferred embodiments of the present application and is not intended to limit the present application, any modifications, equivalent replacements and improvements made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A printer characterized by comprising: The printer comprises: a bracket provided with a sliding groove extending in a first direction; a sliding assembly arranged on the bracket; a paper stop plate connected with the sliding assembly through the sliding groove, so that the paper stop plate can reciprocate relative to the bracket in the first direction; a printing assembly mounted on the bracket, the printing assembly being spaced apart from the sliding assembly in a second direction, the first direction being perpendicular to the second direction, the printing assembly comprising a first connecting line; a circuit board connected with the bracket, the circuit board being provided with a first terminal connected with the first connecting line; wherein, in the second direction, the circuit board is arranged on a side of the sliding assembly facing the printing assembly, so as to separate the first connecting line from the sliding assembly.

2. The printer of claim 1, wherein, In the second direction, the sliding assembly and the printing assembly are located on both sides of the circuit board.

3. The printer of claim 1, wherein, The first terminal is located on a side of the circuit board facing the printing assembly.

4. The printer of claim 1, wherein, The circuit board extends in a third direction, the first direction, the second direction and the third direction being perpendicular to each other.

5. The printer of claim 4, wherein, In the third direction, the distance between the circuit board and the sliding assembly is h1, and h1 satisfies 0.5mm≤h1≤3mm.

6. The printer of claim 1, wherein, The printer further comprises a micro switch and a second connecting line, the micro switch being arranged on the bracket and being spaced apart from the sliding assembly in the second direction, the circuit board being electrically connected with the micro switch through the second connecting line, and the circuit board judging the opening and closing of a cover of the printer according to the micro switch; wherein, in the second direction, the micro switch is arranged on a side of the sliding assembly facing the printing assembly, so as to separate the second connecting line from the sliding assembly.

7. The printer of claim 6, wherein, The second connecting line is connected with and electrically connected to the first connecting line.

8. The printer of claim 1, wherein, The printer further comprises a first sensor and a third connecting line, the first sensor being arranged on the bracket and being spaced apart from the sliding assembly in the second direction, the circuit board being electrically connected with the first sensor through the third connecting line, and the first sensor being used for detecting the position of a label paper; wherein, in the second direction, the first sensor is arranged on a side of the sliding assembly facing the printing assembly, so as to separate the third connecting line from the sliding assembly.

9. The printer of claim 8, wherein, The third connecting line is connected with and electrically connected to the first connecting line.

10. The printer of claim 1, wherein, The printer comprises a host and a cover, the bracket being arranged on the host, the cover being rotationally connected to the host, a second sensor being arranged on the cover, the second sensor being connected with a fourth connecting line, the circuit board being electrically connected with the second sensor through the fourth connecting line, and the second sensor being used for detecting the position of a label paper; wherein, the fourth connecting line is arranged on the edge of the host and the cover, and part of the fourth connecting line is spaced apart from the sliding assembly in the first direction.

11. The printer of claim 10, wherein, The circuit board has a second terminal connected with the fourth connecting line, and the distance between the second terminal and the sliding assembly in the first direction is h2, which satisfies 0cm≤h2≤2cm.

12. The printer of claim 11, wherein, The second terminal is located at the edge of the circuit board in the first direction.

13. The printer of claim 1, wherein, The circuit board comprises a first circuit board and a second circuit board, the first terminal is arranged on the first circuit board, the second circuit board is electrically connected with the first circuit board through a fifth connecting line, a control button is arranged on the support, and the second circuit board performs equipment management on the printer according to the control button.

14. The printer of claim 13, wherein, The printer further comprises a battery, the battery is arranged on the support, and the battery is arranged on two sides of the first circuit board in the thickness direction of the first circuit board respectively.

15. The printer of claim 13, wherein, The fifth connecting line is located on the side of the first circuit board away from the sliding assembly.

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