Printer

Abstract

The utility model discloses a printer which comprises a host and a cover plate, the cover plate is rotatably connected with the host, the rotatable track of the cover plate has a maximum unfolding position, a printing groove in the host is provided with a first side wall and a second side wall which are arranged in a spaced mode, and the first side wall is located on the side, close to the cover plate, of the second side wall. When the cover plate is located at the maximum unfolding position, the printing groove is exposed, and the projection of the cover plate on the upper surface of the host is located on the side, away from the second side wall, of the first side wall, so that enough space is formed above the host to place the wire marking pipe, and the difficulty of placing the wire marking pipe in the printing groove is simplified.

Description

Technical Field

[0001] This application relates to the field of printer technology, and more particularly to a printer. Background Technology

[0002] When printing, the cover needs to be opened first, and then the printout needs to be placed on the printer host. However, in some cases, the cover may interfere with the placement of the printout. Utility Model Content

[0003] This application provides a printer that solves the technical problem that the placement of printed materials is still affected when the cover is open.

[0004] This application provides a printer, including:

[0005] The host has a printing slot for placing the workpiece to be printed, the printing slot having a first sidewall and a second sidewall spaced apart;

[0006] A cover plate is rotatably connected to the host computer. The cover plate has a closed position and a maximum unfolded position on its rotatable trajectory. When the cover plate is in the closed position, the cover plate closes to the host computer. When the cover plate is in the maximum unfolded position, the printing groove is exposed.

[0007] Wherein, the first sidewall is located on the side of the second sidewall closer to the cover plate, and when the cover plate is in the maximum unfolded position, the projection of the cover plate on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

[0008] In some embodiments, the cover plate includes:

[0009] The top cover is rotatably connected to the main unit;

[0010] The middle cover is located inside the upper cover and is rotatably connected to the main unit. The middle cover is used to press against the workpiece to be printed when the cover plate is in the closed position.

[0011] In some embodiments, when the cover is in the maximum unfolded position, the projections of the upper cover and the middle cover onto the upper surface of the host are both located on the side of the first sidewall away from the second sidewall.

[0012] In some embodiments, the cover plate is rotatably connected to the host via a first rotating shaft, a first torsion spring is sleeved on the first rotating shaft, a first free end of the first torsion spring is connected to the host, and a second free end of the first torsion spring is connected to the cover plate. Under the elastic force of the first torsion spring, the cover plate has a tendency to move towards the maximum unfolded position.

[0013] In some embodiments, when the cover is in the maximum extended position, the center of gravity of the cover is spaced apart from the main unit when viewed from above.

[0014] In some embodiments, the host is provided with an upward-facing groove, a ribbon cartridge is disposed in the groove, and a pressing member is provided on the cover plate. When the cover plate is in the closed position, the pressing member presses against the ribbon cartridge.

[0015] When the cover plate is in the maximum unfolded position, the projection of the pressing member on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

[0016] In some embodiments, the ribbon cartridge is located on the side of the second sidewall away from the first sidewall.

[0017] In some embodiments, the printing slot has an inlet end and an outlet end, and a first pressing block is provided on the inner side of the cover plate. The first pressing block has a first end and a second end. The first end is connected to the cover plate, and the second end is used to press the workpiece to be printed when the cover plate is in the closed position. The first end is located on the side of the second end closer to the inlet end.

[0018] In some embodiments, when the cover is in its maximum extended position, the projection of the first pressure block onto the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

[0019] In some embodiments, the first end is rotatably connected to the cover plate.

[0020] In some embodiments, the first end is rotatably connected to the cover plate via a second rotating shaft, a second torsion spring is sleeved on the second rotating shaft, the first free end of the second torsion spring is connected to the cover plate, and the second free end of the second torsion spring is connected to the first pressure block. Under the action of the elastic force of the second torsion spring, the first end has a tendency to move away from the cover plate.

[0021] In some embodiments, the first pressing block includes a first body and a first rolling part. The two ends of the first body are respectively formed as a first end and a second end. The first rolling part is rotatably connected to the second end. The first rolling part is used to press against the workpiece to be printed when the cover plate is in the closed position.

[0022] In some embodiments, a second pressing block is provided on the inner side of the cover plate. The second pressing block is connected to the cover plate and is located on the side of the first pressing block near the inlet end. The second pressing block is used to press the workpiece to be printed when the cover plate is in the closed position.

[0023] When the cover plate is in the maximum unfolded position, the projection of the second pressing block on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

[0024] In some embodiments, the second pressing block includes a second body and a second rolling part, the first rolling part being rotatably connected to the second body, and the second rolling part being used to press against the workpiece to be printed when the cover plate is in the closed position.

[0025] In some embodiments, a third pressing block is provided on the inner side of the cover plate. The third pressing block is connected to the cover plate. When the cover plate is in the closed position, the third pressing block is used to press against the printable part near the outlet end.

[0026] When the cover plate is in its fully extended position, the projection of the third pressing block onto the upper surface of the main unit is located on the side of the first sidewall away from the second sidewall.

[0027] The printer based on the embodiments of this application includes a main unit and a cover plate. The cover plate is rotatably connected to the main unit. The cover plate has a maximum unfolded position on its rotatable trajectory. The printing slot on the main unit has a first sidewall and a second sidewall that are spaced apart. The first sidewall is located on the side of the second sidewall that is closer to the cover plate. When the cover plate is in the maximum unfolded position, the printing slot is exposed. The projection of the cover plate on the upper surface of the main unit is located on the side of the first sidewall that is away from the second sidewall. In this way, there is enough space above the main unit to place the wire tube, which simplifies the difficulty of placing the wire tube in the printing slot. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the printer structure provided in an embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the printer from another perspective, provided in an embodiment of this application.

[0031] Figure 3 This is a schematic diagram of the structure of the cover provided in an embodiment of this application;

[0032] Figure 4 for Figure 3 Enlarged schematic diagram of the structure at point A;

[0033] Figure 5 This is an exploded structural diagram of the cover provided in an embodiment of this application.

[0034] Figure reference numerals:

[0035] 100, Main unit; 100a, Printing slot; 101a, First sidewall; 102a, Second sidewall; 100b, Inlet end; 100c, Outlet end;

[0036] 200. Cover plate; 201. Pressing component; 210. Top cover; 220. Middle cover;

[0037] 300, First pressure block; 301, First end; 302, Second end; 303, Second rotating shaft; 304, Second torsion spring; 310, First body; 320, First rolling part;

[0038] 400. Second pressing block; 410. Second body; 420. Second rolling part;

[0039] 500, ribbon box;

[0040] 600, Third pressing block. Detailed Implementation

[0041] To make the objectives, technical solutions, and advantages of this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this application.

[0042] In the prior art, when printing a document, the cover needs to be opened first, and then the document needs to be placed on the printer host. However, in some cases, the cover can affect the placement of the document.

[0043] If the lid is in its maximum unfolded position, that is, when the lid is rotated to its limit and it is difficult to continue rotating the lid, and if the angle between the lid and the main unit is relatively small, that is, the space above the main unit is limited, then it is inconvenient for the user to put the document to be printed into the printing slot.

[0044] The object to be printed (also known as the printable part) can refer to objects such as wire tubes, leather, metal plates or plastic plates, which need to have labels or patterns printed on their surfaces. In this embodiment of the application, the printable part is exemplarily described using wire tubes.

[0045] Therefore, to resolve the above issues, please refer to [link / reference needed]. Figure 1-3 This application provides a printed component, including a host 100 and a cover plate 200.

[0046] The main unit 100 is the core component of the printer, containing key components such as the printhead, ink / toner cartridge, and transmission system. Upon receiving a print command, the printhead ejects ink or toner onto the printable material according to a preset pattern or text information, completing the printing task. Simultaneously, the main unit 100 has a printing slot 100a for the printable material to pass through. The printing slot 100a has an inlet end 100b and an outlet end 100c, used for inputting and outputting the printable material, respectively. Through an internal transmission system (such as rollers or belts), the printable material can be automatically fed in from the inlet end 100b and output from the outlet end 100c after printing. The printing slot 100a has a first sidewall 101a and a second sidewall 102a spaced apart.

[0047] The cover plate 200 is rotatably connected to the host 100. Its rotational trajectory has a closed position and a maximum unfolded position. The maximum unfolded position is the limit of the cover plate 200's rotation. After the cover plate 200 rotates to this position, it is limited and cannot continue to rotate. When the cover plate 200 is in the closed position, it covers the host 100 and can effectively protect the key components such as the print head and transmission system in the printing area from damage caused by external factors such as dust and moisture. When the cover plate 200 is in the maximum unfolded position, it is convenient for users to observe the working status of the host 100 and perform maintenance work such as replacing ink cartridges / toner cartridges.

[0048] The first sidewall 101a is located on the side of the second sidewall 102a closer to the cover plate 200. Taking the printer's usage state as a reference, the cover plate 200 and the main unit 100 are rotated to the rear. Therefore, the second sidewall 102a of the printing slot 100a is closer to the user, and the first sidewall 101a of the printing slot 100a is farther away from the user. When the cover plate 200 is in the fully extended position, the projection of the cover plate 200 on the upper surface of the main unit 100 is located on the side of the first sidewall 101a away from the second sidewall 102a. This means that the opening formed between the main unit 100 and the cover plate 200 is relatively large, and there is enough space above the main unit 100. The user can easily see the inside of the printing slot 100a, and there is enough space above the printer to facilitate the user placing the wire tube.

[0049] In one embodiment, please refer to Figure 1-2The cover 200 includes an upper cover 210 and a middle cover 220. The upper cover 210 is located outside the main unit 100 and is connected to the main unit 100 by a rotatable connection. The main function of the upper cover 210 is to protect the delicate internal components of the printer from dust, paper scraps and other debris. At the same time, as an exterior component of the printer, it provides a clean and safe appearance.

[0050] The middle cover 220 separates the printing area from other parts, preventing debris and other contaminants from polluting the inside of the printer. Furthermore, the middle cover 220 is located inside the upper cover 210, and its rotation range is smaller than that of the upper cover 210. When the cover plate 200 is in the closed state, the middle cover 220 covers the printing slot 100a, the upper cover 210 covers the upper surface of the printer, and the middle cover 220. The projection of the middle cover 220 onto the upper surface of the host 100 is smaller than the projection of the upper cover 210 onto the upper surface of the host 100. Therefore, in this embodiment, when the cover plate 200 switches from its fully extended position to its closed position, the middle cover 220 can more easily press against the marking tubes within the printing slot 100a, ensuring that the marking tubes maintain a stable position during printing and preventing them from moving or becoming misaligned, thereby ensuring printing quality and accuracy.

[0051] Furthermore, when the cover plate 200 is in its fully extended position, the projections of the upper cover 210 and the middle cover 220 onto the upper surface of the host 100 are both located on the side of the first side wall 101a away from the second side wall 102a. That is, when the cover plate 200 is fully opened, in the vertical direction, the projections of the upper cover 210 and the middle cover 220 onto the upper surface of the host 100 do not obstruct the print slot 100a, allowing the user to quickly insert the wire gauge into the print slot 100a. In addition, there is sufficient space for maintenance work, such as cleaning the print head or checking the printing status.

[0052] In one embodiment of this application, the cover plate 200 is rotatably connected to the host 100 via a first rotating shaft. A first torsion spring is sleeved on the first rotating shaft. The first free end of the first torsion spring is connected to the host 100, and the second free end of the first torsion spring is connected to the cover plate 200. Under the action of the elastic force of the first torsion spring, the cover plate 200 has a tendency to move towards the maximum unfolded position.

[0053] When the cover plate 200 is in the fully extended position, the elastic force of the first torsion spring will keep the cover plate 200 stable, preventing it from closing accidentally due to external force or vibration, and ensuring that the cover plate 200 is unlikely to close and cause injury when the user is placing wire pipes or performing maintenance work.

[0054] Please see Figure 1-2In one embodiment of this application, when the cover plate 200 is in its fully extended position, viewed from above, the center of gravity of the cover plate 200 is spaced apart from the host 100, which prevents the cover plate 200 from tipping over or wobbling due to an unstable center of gravity. This is particularly important when printing or maintenance requires the cover plate to remain open for extended periods, ensuring its stability and reliability and preventing damage or safety hazards caused by accidental tipping.

[0055] It should be understood that when the first sidewall 101a is located on the side of the second sidewall 102a away from the user, the projection of the cover 200 in the maximum unfolded position is also located on the side of the first sidewall 101a away from the second sidewall 102a. Thus, even if the cover 200 is accidentally touched, under the action of gravity, the cover 200 has a tendency to fall towards the rear of the host 100, thereby reducing the possibility of the cover 200 suddenly closing in the maximum unfolded position.

[0056] It's also important to understand that printers typically include a ribbon cartridge 500, which contains the ribbon carrying the images, text, and other information to be printed. When the printer is working, the toner or wax on the ribbon is transferred to the marking tubes under the influence of heat, forming clear images or text. The ribbon cartridge 500 is responsible for providing a stable and continuous supply of ribbon during the printing process, ensuring smooth printing.

[0057] The main unit 100 has an upward-facing groove, in which a ribbon box 500 is installed. As a whole component, the ribbon box 500 can be quickly installed and removed when installed in the groove, making ribbon replacement simpler and faster. Users do not need to manually handle the ribbon; they only need to replace the entire ribbon box 500.

[0058] In one embodiment, a pressing member 201 is provided on the inner side of the cover plate 200. When the cover plate 200 is in the closed position, the pressing member 201 presses against the ribbon cartridge 500. The pressing member 201 applies a certain pressure to the ribbon cartridge 500 to prevent it from moving or shaking during the printing process, thus ensuring the stability of the ribbon cartridge 500 in the groove, thereby ensuring the printing quality and preventing damage to the internal components of the printer.

[0059] Furthermore, when the cover plate 200 is in its fully extended position, the projection of the pressing member 201 on the upper surface of the host 100 is located on the side of the first side wall 101a away from the second side wall 102a, that is, in the vertical direction, the projection of the pressing member 201 on the upper surface of the host 100 does not obstruct the printing slot 100a, allowing the user to quickly insert the wire tube into the printing slot 100a. In addition, there is enough space for maintenance work, such as cleaning the print head or checking the printing status.

[0060] Based on the previous embodiment, please refer to Figure 1The ribbon cartridge 500 is located on the side of the second side wall 102a away from the first side wall 101a. When the second side wall 102a of the printing slot 100a is closer to the user than the first side wall 101a of the printing slot 100a, the ribbon cartridge 500 is also closer to the user. Thus, when the cover 200 is in the fully extended position, the upper surface of the host 100 has enough space to facilitate the user to install or replace the ribbon cartridge 500 at close range.

[0061] In addition, because the ribbon cartridge 500 is closer to the user, the user can see the installation position and method of the ribbon cartridge 500 more clearly, thereby avoiding errors during the installation process and ensuring the normal operation of the printer. It also makes it easier for the user to observe the status of the ribbon cartridge 500, such as the remaining amount of ribbon or whether there is a malfunction, to ensure the continuous and stable operation of the printer.

[0062] In one embodiment of this application, please refer to Figure 3-4 The cover plate 200 has a first pressing block 300 on its inner side. The first pressing block 300 has a first end 301 and a second end 302. The first end 301 is rotatably connected to the cover plate 200, and the second end 302 is used to hold the workpiece to be printed when the cover plate 200 is in the closed position, so as to keep it flat and prevent it from moving during printing. Through the pressing action of the first pressing block 300, the relative position between the print head and the workpiece to be printed can be kept stable, thereby improving the print quality.

[0063] In this embodiment, when the cover plate 200 is in the closed position, the first end 301 is located on the side of the second end 302 near the inlet end 100b. The user can manually swing the first pressure block 300 so that the first pressure block 300 is in an inclined state, that is, the first end 301 is located on the side of the second end 302 near the inlet end 100b, until the second end 302 presses against the wire tube. The user can then remove their hand and continue to rotate the cover plate 200 until the cover plate 200 is in the closed position.

[0064] by Figure 1 The orientation is described as follows: the inlet end 100b is located on the right, the outlet end 100c is located on the left, the corresponding second end 302 is on the left, and the first end 301 is on the right. That is, the wire tube moves from the right to the left. When the second end 302 presses against the wire tube, the friction between the wire tube and the second end 302 will cause the first pressure block 300 to rotate clockwise. Thus, as the wire tube continues to move, the friction between the wire tube and the second end 302 is unlikely to increase, which can ensure the smoothness of the wire tube passing through the tube.

[0065] Furthermore, when the cover plate 200 is in its fully extended position, the projection of the first pressing block 300 on the upper surface of the host 100 is located on the side of the first side wall 101a away from the second side wall 102a, that is, in the vertical direction, the projection of the first pressing block 300 on the upper surface of the host 100 does not obstruct the printing slot 100a, so that the user can quickly put the wire tube into the printing slot 100a. In addition, there is enough space for maintenance work, such as cleaning the print head or checking the printing status.

[0066] In one embodiment of this application, the first end 301 is rotatably connected to the cover plate 200, so that the first pressing block 300 is flexibly set relative to the cover plate 200. In this way, when dealing with wire tubes of different diameters, the position of the first pressing block 300 relative to the printing groove 100a can be adaptively adjusted, thereby adapting to wire tubes of different specifications within a certain range.

[0067] Furthermore, since the first pressure block 300 is flexibly set relative to the cover plate 200, meaning it has a certain rotation trajectory, if a user accidentally touches the first pressure block 300, since the first pressure block 300 and the cover plate 200 are not relatively fixed, the first pressure block 300 can rotate to avoid being touched by the user, thereby reducing the possibility of the first pressure block 300 breaking.

[0068] In the above embodiments, the pressure exerted by the first pressure block 300 on the wire tube is mainly achieved by its own weight. To further improve the pressure exerted by the first pressure block 300 on the wire tube, please refer to an embodiment of this application. Figure 4-5 The first end 301 is rotatably connected to the cover plate 200 via the second rotating shaft 303. A second torsion spring 304 is sleeved on the second rotating shaft 303. The first free end of the second torsion spring 304 is connected to the cover plate 200, and the second free end of the second torsion spring 304 is connected to the first pressure block 300. Under the action of the elastic force of the second torsion spring 304, the first end 301 has a tendency to move away from the cover plate 200, that is, under the action of the elastic force, the first end 301 will move closer to the printing groove 100a.

[0069] That is, under the elastic force of the second torsion spring 304, the first pressure block 300 is driven to press against the wire marking tube. Under the elastic force of the second torsion spring 304 and combined with the weight of the first pressure block 300, the wire marking tube can be pressed more stably, ensuring the accuracy of the wire marking tube printing.

[0070] Since the second end 302 of the first pressure block 300 presses against the wire tube when the cover plate 200 is closed, friction will be generated between the first pressure block 300 and the wire tube. The further friction may affect the smoothness of the wire tube.

[0071] Therefore, in one embodiment of this application, please refer to Figure 4-5The first pressing block 300 includes a first body 310 and a first rolling part 320. The two ends of the first body 310 are respectively formed as a first end 301 and a second end 302. The first rolling part 320 is rotatably connected to the second end 302. When the cover plate 200 is in the closed state, the first rolling part 320 is used to hold the workpiece to be printed.

[0072] The axis of the first rolling part 320 is parallel to the axis of the shaft connecting the first end 301 and the cover plate 200. Therefore, the contact between the first rolling part 320 and the wire tube is rolling contact. Rolling contact means that there is less rolling friction. Therefore, the wear on the wire tube can be reduced by the first rolling part 320, and the smoothness of the wire tube can also be improved.

[0073] Furthermore, the first rolling part 320 is made of an elastic material, such as rubber, silicone, or polyurethane. By using an elastic material for the first rolling part 320, it can better adapt to the unevenness of the wire tube surface and ensure that the pressure is evenly distributed across the entire contact surface through slight deformation, thereby reducing printing quality problems caused by excessive local pressure.

[0074] In one embodiment, please continue to refer to Figure 1-2 The printer also includes a second pressure block 400, which is located inside the cover plate 200 and spaced apart from the first pressure block 300. When the cover plate 200 is in the closed position, the second pressure block 400 is used to press against the workpiece to be printed.

[0075] When the cover plate 200 is in the closed state, the first pressing block 300 presses against the wire tube. Under the action of the pressing force, the position in contact with the first pressing block 300 will sink, and the adjacent position may lift up. Therefore, by setting the second pressing block 400, it can press against the wire tube at intervals with the first pressing block 300 when the cover plate 200 is in the closed state, which plays an auxiliary pressing role and ensures that the wire tube moves in the printing slot 100a according to the preset trajectory.

[0076] It should be understood that, in this embodiment, the second pressure block 400 is located on the side of the first pressure block 300 near the inlet end 100b, which can ensure the smoothness of the tube inlet. In this embodiment, when the cover plate 200 is in the maximum unfolded position, the projection of the second pressure block 400 on the upper surface of the host 100 is located on the side of the first side wall 101a away from the second side wall 102a. That is, in the vertical direction, the projection of the second pressure block 400 on the upper surface of the host 100 does not obstruct the printing slot 100a, so that the user can quickly put the wire tube into the printing slot 100a. In addition, there is enough space for maintenance work, such as cleaning the print head or checking the printing status.

[0077] Furthermore, please continue reading Figure 4-5The second pressing block 400 includes a second body 410 and a second rolling part 420. The second rolling part 420 is rotatably connected to the second body 410. When the cover plate 200 is in the closed state, the second rolling part 420 is used to press against the workpiece to be printed.

[0078] The axis of the second rolling part 420 is parallel to the axis of the shaft connecting the first end 301 and the cover plate 200. That is, the axis of the second rolling part 420 is parallel to the axis of the first rolling part 320. Therefore, the contact between the second rolling part 420 and the wire tube is also a rolling contact. Rolling contact means that there is less rolling friction. Therefore, the wear on the wire tube can be reduced by the second rolling part 420, and the smoothness of the wire tube can also be improved.

[0079] The material of the second rolling part 420 can be the same as that of the first rolling part 320, namely, an elastic material, such as rubber, silicone, or polyurethane. This material can better adapt to the uneven surface of the wire tube and ensure that the pressure is evenly distributed across the entire contact surface through slight deformation, thereby reducing printing quality problems caused by excessive local pressure.

[0080] In one embodiment of this application, please refer to Figure 1-2 A third pressing block 600 is provided on the inner side of the cover plate 200. The third pressing block 600 is connected to the cover plate 200. When the cover plate 200 is in the closed position, the third pressing block 600 is used to press the printable part near the outlet end 100c.

[0081] When the cover plate 200 is closed, the third pressure block 600 can directly press against the workpiece to be printed near the outlet end 100c, thereby effectively fixing the workpiece to be printed and preventing it from moving or shifting during the printing process. This ensures the accuracy and quality of printing and reduces the probability of printing errors or defects caused by changes in the position of the workpiece to be printed.

[0082] Since the third pressure block 600 and the first pressure block 300 are set at intervals, the third pressure block 600 can also press down the wire marking tube, reducing the probability of the marking tube lifting up, and further improving the smoothness of the wire marking tube running in the printing slot 100a.

[0083] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this application, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, they are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the accompanying drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0084] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A printer, characterized in that, include: The host has a printing slot for placing the workpiece to be printed, the printing slot having a first sidewall and a second sidewall spaced apart; A cover plate is rotatably connected to the host computer. The cover plate has a closed position and a maximum unfolded position on its rotatable trajectory. When the cover plate is in the closed position, the cover plate closes to the host computer. When the cover plate is in the maximum unfolded position, the printing groove is exposed. Wherein, the first sidewall is located on the side of the second sidewall closer to the cover plate, and when the cover plate is in the maximum unfolded position, the projection of the cover plate on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

2. The printer according to claim 1, characterized in that, The cover plate includes: The top cover is rotatably connected to the main unit; The middle cover is located inside the upper cover and is rotatably connected to the main unit. The middle cover is used to press against the workpiece to be printed when the cover plate is in the closed position.

3. The printer according to claim 2, characterized in that, When the cover is in the maximum unfolded position, the projections of the upper cover and the middle cover onto the upper surface of the host are both located on the side of the first sidewall away from the second sidewall.

4. The printer according to claim 1, characterized in that, The cover plate is rotatably connected to the host via a first rotating shaft. A first torsion spring is sleeved on the first rotating shaft. The first free end of the first torsion spring is connected to the host, and the second free end of the first torsion spring is connected to the cover plate. Under the action of the elastic force of the first torsion spring, the cover plate has a tendency to move towards the maximum unfolded position.

5. The printer according to claim 1, characterized in that, When the cover is in its maximum extended position, viewed from above, the center of gravity of the cover is spaced apart from the main unit.

6. The printer according to claim 1, characterized in that, The main unit is provided with an upward-facing groove, and a ribbon box is disposed in the groove. The cover plate is provided with a pressing member. When the cover plate is in the closed position, the pressing member presses against the ribbon box. When the cover plate is in the maximum unfolded position, the projection of the pressing member on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

7. The printer according to claim 6, characterized in that, The ribbon box is located on the side of the second sidewall away from the first sidewall.

8. The printer according to claim 1, characterized in that, The printing slot has an inlet end and an outlet end. The inner side of the cover plate is provided with a first pressing block. The first pressing block has a first end and a second end. The first end is connected to the cover plate. The second end is used to press the workpiece to be printed when the cover plate is in the closed position. The first end is located on the side of the second end closer to the inlet end.

9. The printer according to claim 8, characterized in that, When the cover is in its maximum extended position, the projection of the first pressure block onto the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

10. The printer according to claim 8, characterized in that, The first end is rotatably connected to the cover plate.

11. The printer according to claim 10, characterized in that, The first end is rotatably connected to the cover plate via a second rotating shaft. A second torsion spring is sleeved on the second rotating shaft. The first free end of the second torsion spring is connected to the cover plate, and the second free end of the second torsion spring is connected to the first pressure block. Under the action of the elastic force of the second torsion spring, the first end has a tendency to move away from the cover plate.

12. The printer according to claim 8, characterized in that, The first pressing block includes a first body and a first rolling part. The two ends of the first body are respectively formed as a first end and a second end. The first rolling part is rotatably connected to the second end. The first rolling part is used to press the workpiece to be printed when the cover plate is in the closed position.

13. The printer according to claim 8, characterized in that, A second pressing block is provided on the inner side of the cover plate. The second pressing block is connected to the cover plate and is located on the side of the first pressing block near the inlet end. The second pressing block is used to press the workpiece to be printed when the cover plate is in the closed position. Wherein, when the cover plate is in the maximum unfolded position, the projection of the second pressing block on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

14. The printer according to claim 13, characterized in that, The second pressing block includes a second body and a second rolling part. The first rolling part is rotatably connected to the second body. The second rolling part is used to press against the workpiece to be printed when the cover plate is in the closed position.

15. The printer according to claim 8, characterized in that, A third pressure block is provided on the inner side of the cover plate. The third pressure block is connected to the cover plate. When the cover plate is in the closed position, the third pressure block is used to press against the printable part near the outlet end. When the cover plate is in its maximum extended position, the projection of the third pressing block on the upper surface of the host is located on the side of the first sidewall away from the second sidewall.

Images