Printer

Abstract

The utility model discloses a printer which comprises a base, a cover plate assembly, a printing assembly and an elastic piece. The base is provided with a first containing part and a second containing part which are communicated. The first containing part is used for containing printing paper. The cover plate assembly is rotationally connected to the base and comprises a cover plate, a connecting rod and a rubber roller, the connecting rod is rotationally connected to the face, close to the base, of the cover plate, and the rubber roller is arranged on the connecting rod; the printing assembly is located in the second containing part, the mounting base is assembled on the base, the printing module is assembled on the mounting base, and clamping grooves are formed in the two ends, corresponding to the connecting rod, of the printing module correspondingly. The elastic piece is fixed to the printing module and partially extends to the inner side of the clamping groove to form a limiting part, and the limiting part can move towards the outer side of the clamping groove when pressed, so that the connecting rod can be embedded into the clamping groove and is used for limiting the connecting rod to be disengaged from the clamping groove. According to the printer provided by the utility model, the reliability of the closing function of the cover plate assembly is improved through the improvement of the elastic piece.

Description

Technical Field

[0001] This application belongs to the field of food delivery equipment technology, specifically relating to a printer. Background Technology

[0002] In recent years, with the rapid development of business models such as food delivery and fast goods delivery, related supporting equipment has emerged to improve the accuracy of order preparation and delivery processes. Quick-dry printers are one such important piece of equipment, used to print relevant order information so that merchants and delivery personnel can accurately obtain order and delivery details.

[0003] These types of express printers are typically used by merchants in the catering industry and other businesses with high volumes of takeout orders. Unlike regular commercial printers and POS printers, express printers suitable for the takeout business model are characterized by high printing volume, non-fixed location, and noisy surrounding environments. Especially in terms of high printing volume, due to the large number of takeout orders, the printer often needs to be refilled with paper, and the printer cover needs to be opened and closed frequently. Repeated, rough, and abrupt opening and closing of the cover can easily cause jamming failures, thus reducing the reliability of the cloud printer's cover structure. Utility Model Content

[0004] This application aims to provide a printer that addresses at least one of the problems in the background art.

[0005] According to a first aspect of this application, a printer is provided, comprising:

[0006] A base having a first receiving portion and a second receiving portion in communication, the first receiving portion being used to hold printing paper;

[0007] A cover plate assembly is rotatably connected to the base and has an open position and a closed position relative to the base. The cover plate assembly includes a cover plate, a connecting rod, and a rubber roller. The connecting rod is rotatably connected to the side of the cover plate near the base, and the rubber roller is disposed on the connecting rod.

[0008] A printing assembly is located in the second receiving portion and includes a mounting base and a printing module. The mounting base is assembled to the base, and the printing module is assembled to the mounting base. The printing module has slots at both ends corresponding to the connecting rod.

[0009] An elastic element is fixed to the printing module and extends partially to the inner side of the slot to form a limiting part. When the limiting part is pressed, it can move to the outer side of the slot, so that the connecting rod can be inserted into the slot and is used to prevent the connecting rod from coming out of the slot.

[0010] Optionally, the printing module includes a metal bracket and a print head disposed on the metal bracket, wherein the elastic element and the slot are both disposed on the metal bracket;

[0011] When the cover plate assembly is in the closed position, the printing surface of the print head faces the first receiving portion and forms a paper feeding channel communicating with the first receiving portion with the rubber roller. The two ends of the connecting rod are respectively engaged in the slot. The connecting rod can cause the rubber roller to drive the printing paper out of the paper feeding channel by rotating.

[0012] Optionally, the metal bracket has sidewalls corresponding to both ends of the printhead, the slot and the elastic element are both disposed on the sidewalls, the slot is a U-shaped slot, and the opening and bottom corner of the U-shaped slot are provided with arc-shaped bevels.

[0013] Optionally, the elastic element is integrally bent and formed, the side wall surface of the metal bracket is provided with a groove, and the side wall of the groove is provided with at least two protrusions that protrude towards the inside of the groove. Each of the protrusions forms a first limiting groove with the bottom wall of the groove. The elastic element is partially located in the first limiting groove, so that the elastic element is engaged in the groove through the protrusions.

[0014] Optionally, the elastic element includes a fixed end and a movable end, and an arc-shaped segment connecting the fixed end and the movable end, wherein at least a portion of the movable end extends to the inner side of the slot to form the limiting portion;

[0015] A circular boss is also provided on the bottom wall of the groove. The circular boss and the side wall of the groove form a second limiting groove. The arc-shaped segment is located in the second limiting groove, and the fixed end and the movable end are respectively located on both sides of the circular boss.

[0016] The movable end has a movable gap with one side of the circular boss, and the movable gap allows the limiting part to move to the outside of the slot.

[0017] Optionally, the limiting part includes a pressure-receiving section, a limiting section, and a guide section connected in sequence, and the guide section is located at the outermost end of the movable end;

[0018] The side wall of the metal bracket is provided with a guide groove corresponding to the slot opening of the card slot. The guide section extends at least partially into the guide groove. When the limiting part moves to the outside of the card slot, the guide section can move in the guide groove along the moving direction of the limiting part.

[0019] The pressure section is used to guide the connecting rod to be inserted into the slot, and when the connecting rod is inserted into the slot, the limiting section is used to prevent the connecting rod from coming out of the slot.

[0020] Optionally, the cover plate assembly further includes a bushing and a transmission gear, the transmission gear being fixed to the first end of the connecting rod, and the bushing being rotatably connected to the second end of the connecting rod;

[0021] The cover plate is provided with a mounting bracket. The two ends of the connecting rod are rotatably mounted on the mounting bracket through the transmission gear and the bushing, respectively. The transmission gear is used to connect with the power device to drive the connecting rod to rotate around its own axis.

[0022] Optionally, the transmission gear includes a gear area and a first limiting area. The gear area is used to connect to the power device, and the first limiting area is located on the side of the gear area near the rubber roller, and is used for axial limiting of the first end of the connecting rod.

[0023] The bushing has a connecting area and a second limiting area. The end of the connecting rod is assembled to the mounting bracket through the connecting area, and the second limiting area is used for axial limiting of the second end of the connecting rod.

[0024] Optionally, it also includes an unlocking mechanism, which is movably mounted on the mounting base, and the cover plate is provided with an unlocking ramp corresponding to the position of the unlocking mechanism;

[0025] When the cover plate assembly is in the closed position, the unlocking mechanism can act on the unlocking ramp, causing the cover plate to drive the end of the connecting rod to press against the limiting part to disengage from the slot. After the end of the connecting rod disengages from the slot, the cover plate assembly is in the open position.

[0026] Optionally, the unlocking mechanism has an initial position and an unlocking position, and has an unlocking end;

[0027] When the cover plate assembly is in the closed position, the unlocking mechanism can move from the initial position to the unlocked position and protrude from the upper surface of the printing assembly, so that the unlocking end can act on the unlocking ramp.

[0028] In the embodiments of this application, by setting a slot and an elastic element in the printing component, and by having the limiting part of the elastic element extend or move out of the slot to engage the connecting rod with the rubber roller, the purpose of locking the cover assembly is achieved. Furthermore, by enabling the limiting part of the elastic element to move outward from the slot when under pressure, the impact of repeated opening and closing on the fatigue of the elastic element material is avoided, thereby improving the reliability of the closing function of the cover assembly.

[0029] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0030] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0031] Figure 1 This is a schematic diagram of the internal structure of the printer provided by this utility model;

[0032] Figure 2 This is a schematic diagram of the connection between the cover plate assembly and the base provided by this utility model;

[0033] Figure 3 This is a structural schematic diagram of the cover plate assembly provided by this utility model;

[0034] Figure 4 This is a schematic diagram of the printing component provided by this utility model;

[0035] Figure 5 This is a schematic diagram of the installation of the elastic element and the side wall of the metal bracket provided by this utility model;

[0036] Figure 6 This is a schematic diagram of the structure of the elastic element provided by this utility model;

[0037] Figure 7 This is a schematic diagram of the side wall structure of the metal bracket provided by this utility model.

[0038] Figure label:

[0039] 1. Base; 11. First receiving part; 12. Second receiving part;

[0040] 2. Cover plate assembly; 21. Cover plate; 22. Connecting rod; 23. Rubber roller; 24. Bushing; 241. Second limiting area; 242. Connecting area; 25. Transmission gear; 251. Gear area; 252. First limiting area; 26. Unlocking ramp; 27. Mounting bracket;

[0041] 3. Printing assembly; 31. Mounting base; 32. Metal bracket; 321. Groove; 322. Protrusion; 3221. First limiting groove; 323. Circular boss; 3231. Second limiting groove; 324. Guide groove; 33. Slot; 34. Print head; 35. Power unit;

[0042] 4. Elastic element; 41. Fixed end; 42. Arc-shaped section; 43. Limiting part; 44. Pressure-bearing section; 45. Limiting section; 46. Guide section;

[0043] 5. Unlocking mechanism. Detailed Implementation

[0044] Embodiments of this application will now be described in detail. Examples of these embodiments are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application are within the scope of protection of this application.

[0045] The terms "first" and "second" in the specification and claims of this application may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise stated, "multiple" means two or more. Furthermore, "and / or" in the specification and claims indicates at least one of the connected objects, and the character " / " generally indicates that the preceding and following objects are in an "or" relationship.

[0046] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, 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, and therefore should not be construed as a limitation of this application.

[0047] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0048] The following is combined Figures 1-7 A printer according to an embodiment of this application is described.

[0049] like Figures 1 to 5As shown, according to some embodiments of this application, a printer is provided, including: a base 1, a cover plate assembly 2, a printing assembly 3, and an elastic member 4; the base 1 has a communicating first receiving portion 11 and a second receiving portion 12, the first receiving portion 11 being used to hold printing paper; the cover plate assembly 2 is rotatably connected to the base 1 and has an open position and a closed position relative to the base 1, the cover plate assembly 2 including a cover plate 21, a connecting rod 22, and a rubber roller 23, the connecting rod 22 being rotatably connected to the side of the cover plate 21 near the base 1, and the rubber roller 23 being disposed on... The connecting rod 22; the printing assembly 3 is located in the second receiving part 12 and includes a mounting base 31 and a printing module. The mounting base 31 is assembled on the base 1, and the printing module is assembled on the mounting base 31. The printing module is provided with slots 33 at both ends corresponding to the connecting rod 22. The elastic member 4 is fixed to the printing module and extends partially to the inside of the slot 33 to form a limiting part 43. When the limiting part 43 is pressed, it can move to the outside of the slot 33 so that the connecting rod 22 can be inserted into the slot 33 and is used to limit the connecting rod 22 from coming out of the slot 33.

[0050] Specifically, in this embodiment, the cover plate assembly 2 can be rotatably mounted on the base 1 via a pivot or hinge, allowing the cover plate assembly 2 to be in the open position for paper changing, maintenance, or other operations, or in the closed position for printing. The rubber roller 23 and the print head 34 in the printing assembly 3 enable the printer's printing function. During printing, the two ends of the connecting rod 22 are respectively embedded in two slots 33 on the printing module, allowing the rubber roller 23 to cooperate with the print head 34 for printing.

[0051] In the above embodiments, one or two elastic elements 4 are provided to achieve locking of at least one end of the connecting rod 22. For example, an elastic element 4 is provided at corresponding positions in both slots 33, and a portion of the elastic element 4 extends into the inner side of the slot 33 to form a limiting part 43. When both ends of the connecting rod 22 are located in the slots 33, the limiting part 43 can limit the ends of the connecting rod 22 in the corresponding slots 33, preventing the connecting rod 22 from coming out of the slots 33.

[0052] Furthermore, the elastic element 4 provided by this utility model can also move towards the outside of the slot 33 when it is pressed, so that when the cover plate assembly 2 moves from the open position to the closed position, the limiting part 43 can move towards the outside of the slot 33 after being pressured by the end of the connecting rod 22, so that the connecting rod 22 can move from the outside of the slot 33 to the inside of the slot 33. Then, under the elastic force of the elastic element 4, the limiting part 43 can rebound to the position located inside the slot 33, so as to realize the limiting effect on the connecting rod 22, thereby improving the reliability of the printer's printing operation.

[0053] This invention achieves the connection and disconnection of the connecting rod 22 and the printing component 3 through the cooperation of the aforementioned elastic element 4 and the slot 33, thereby realizing the opening and closing between the cover assembly 2 and the base 1. The elastic element 4 simplifies the opening and closing of the cover assembly 2 and the base 1, eliminating the need for complex structures and simplifying the internal structure of the printer. Furthermore, the cooperation between the elastic element limiting part and the slot avoids the impact on the fatigue of the elastic element material, improves the service life of the elastic element, and ensures the reliability of the cover assembly's closing function. The specific form of the elastic element 4 can be customized according to actual needs, improving design flexibility and universality, and reducing design and production costs.

[0054] Furthermore, in the above embodiments, if the cover assembly 2 needs to move from the closed position to the open position, since the elastic element 4 can move outward of the slot 33 under the action of external force, an external force can be applied directly or indirectly to the elastic element 4 to move it outward of the slot 33. This allows the connecting rod 22 to disengage from the slot 33, thereby achieving the purpose of opening the cover assembly 2. All components of the cover assembly 2 are integrated on the cover 21, and all components of the printing module in the printing assembly 3 are integrated on the mounting base 31 and assembled to the second receiving part 12 of the base 1 via the mounting base 31. This improves the modular design of the printer components, facilitating assembly and subsequent maintenance disassembly.

[0055] Understandably, the first receiving part 11 and the second receiving part 12 on the base 1 are interconnected, so that the printing paper located in the first receiving part 11 can enter the position of the printing component 3 to realize the printing work.

[0056] Optionally, such as Figures 4 to 5 As shown, the printing module includes a metal bracket 32 ​​and a print head 34 disposed on the metal bracket 32. The elastic element 4 and the slot 33 are both disposed on the metal bracket 32. When the cover plate assembly 2 is in the closed position, the printing surface of the print head 34 faces the first receiving part 11 and forms a paper feeding channel communicating with the first receiving part 11 with the rubber roller 23. The two ends of the connecting rod 22 are respectively engaged in the slot 33. The connecting rod 22 can cause the rubber roller 23 to drive the printing paper to pass through the paper feeding channel by rotating.

[0057] Specifically, in this embodiment, all parts of the printing module are integrated and assembled on the metal bracket 32. On the one hand, the metal bracket 32 ​​has high structural strength, which can improve the structural reliability of the entire printing module. On the other hand, the slots 33 are set at the positions of the metal bracket 32 ​​corresponding to the two ends of the print head 34, which improves the rationality of the design. Moreover, the slots 33 will not fail to engage due to the long-term opening and closing of the cover assembly 2, which further improves the reliability of the printer and extends the service life of the printer.

[0058] In some embodiments, the printhead 34 is typically a thermal printhead 34, which can achieve printing by heating and cooperating with the rubber roller 23. The heating surface (i.e., the printing surface) of the printhead 34 can face the first receiving portion 11. When the cover assembly 2 is in the closed position, the rubber roller 23 forms a paper feeding channel with the printing surface of the printhead 34. The paper feeding channel communicates with the first receiving portion 11, allowing the printing paper to directly pass into the paper feeding channel. After being printed by the printhead 34 within the paper feeding channel, the paper exits the paper feeding channel through the rubber roller 23 and reaches the outside of the printer. The rotation of the rubber roller 23 is achieved by the rotation of the connecting rod 22 around its axis, which can be achieved by an external power device 35. The specific design can be tailored to the actual structure of the product, and this invention does not limit this design.

[0059] In practical applications, all the aforementioned components are integrated onto the metal bracket 32. When problems arise with the printhead 34 or paper jams occur in the paper path, opening the cover assembly 2 directly resolves the printing issues, improving the printer's usability. Furthermore, the metal bracket 32 ​​can be cast using a mold, and the mounting base 31 can be manufactured using injection molding; both manufacturing processes are mature and cost-effective, reducing the overall production cost of the printer.

[0060] Optionally, such as Figures 4 to 5 As shown, the metal bracket 32 ​​has sidewalls corresponding to both ends of the print head 34. The slot 33 and the elastic element 4 are both provided on the sidewalls. The slot 33 is a U-shaped slot, and the opening and bottom corner of the U-shaped slot are provided with arc-shaped bevels.

[0061] Specifically, in this embodiment, by providing slots 33 and elastic elements 4 on the sidewalls of the metal bracket 32 ​​corresponding to both ends of the print head 34, the rationality of the structural design is improved. On the other hand, when the cover plate assembly 2 is in the closed position, the engaging position of the connecting rod 22 (i.e., both ends of the connecting rod 22) is respectively engaged in the two slots 33, so that the rubber roller 23 on the connecting rod 22 can smoothly cooperate with the print head 34 for printing, avoiding interference between the slots 33, elastic elements 4 and other printing components such as the rubber roller 23 and the print head 34.

[0062] Furthermore, the slot 33 is designed as a U-shaped groove, which matches the cylindrical structure of the connecting rod 22, preventing the connecting rod 22 from wobbling within the slot 33 and improving the accuracy and reliability of printing by the print head 34. Additionally, the arc-shaped bevel at the opening of the slot 33 facilitates the insertion of the end of the connecting rod 22 into the slot 33. The arc-shaped bevel at the bottom improves the matching with the outer contour of the connecting rod 22, further enhancing the stability of the connecting rod 22 within the slot 33. It also prevents excessive stress at the bottom corner of the slot 33, which could lead to breakage or cracking of the sidewalls of the slot 33, thus extending the service life of the slot 33 structure.

[0063] Optionally, such as Figures 4 to 6 As shown, the elastic member 4 is integrally bent and formed. The side wall surface of the metal bracket 32 ​​is provided with a groove 321. At least two protrusions 322 protruding towards the inside of the groove 321 are provided on the side wall of the groove 321. Each protrusion 322 forms a first limiting groove 3221 with the bottom wall of the groove 321. Part of the structure of the elastic member 4 is located in the first limiting groove 3221, so that the elastic member 4 is engaged in the groove 321 through the protrusions 322.

[0064] Specifically, in this embodiment, the elastic element 4 can be integrally bent from metal material, which reduces the manufacturing difficulty of the elastic element 4 and facilitates the assembly of the elastic element 4 with the metal bracket 32.

[0065] In one embodiment, the sidewall of the metal bracket 32 ​​is provided with a groove 321. The elastic element 4 can be engaged and fixed within the first limiting groove 3221 by a protrusion 322 protruding into the groove 321 from the upper sidewall of the groove 321, thus fixing the elastic element 4. This fixing method only requires designing a corresponding structure on the mold when casting the metal bracket 32, making the metal bracket 32 ​​a one-piece molded structure and improving the reliability of fixing the elastic element 4. The number of protrusions 322 can be designed according to actual needs. Figure 6 As shown, a protrusion 322 can be provided on each side of the groove 321, so that the two ends of the elastic member 4 can be respectively engaged in the first limiting groove 3221 formed by the protrusion 322 and the bottom wall of the groove 321.

[0066] In practical applications, the groove 321 is provided on one side of the slot 33, so that after one end of the elastic member 4 is fixed, the other end can extend to the inside of the slot 33. It also facilitates the movement of the limiting part 43 extending to the inside of the slot 33 to the outside of the slot 33, simplifying the structural features of the slot 33 and the elastic member 4.

[0067] Optionally, such as Figures 4 to 6 As shown, the elastic member 4 includes a fixed end 41 and a movable end, as well as an arc-shaped segment connecting the fixed end 41 and the movable end. At least a portion of the movable end extends to the inner side of the slot 33 to form a limiting part 43. A circular boss 323 is also provided on the bottom wall of the groove 321. The circular boss 323 and the side wall of the groove 321 form a second limiting groove 3231. The arc-shaped segment is located in the second limiting groove 3231, and the fixed end 41 and the movable end are located on both sides of the circular boss 323 respectively. There is a movable gap between the movable end and one side of the circular boss 323. The movable gap allows the limiting part 43 to move to the outside of the slot 33.

[0068] Specifically, such as Figure 5As shown, in this embodiment, the fixed end 41 of the elastic member 4 is fixed to the left side of the circular boss 323, and the movable end is movably assembled to the right side of the circular boss 323, and is limited by two protrusions 322 on the left and right sides respectively. The circular boss 323 can limit the arc-shaped segment of the elastic member 4 within the second limiting groove 3231, preventing the elastic member 4 from moving entirely within the groove 321. On the other hand, the right side of the circular boss 323 can form an movable gap with the movable end, so that when the limiting part 43 is pressed or subjected to external force, it can move outward from the slot 33, that is, towards the side closer to the groove 321. This satisfies both the limiting and moving requirements of the elastic member 4, and the assembly method is simple. In addition, the groove 321 is provided on the side wall of the metal bracket 32, saving space in the length direction of the printing component 3, which is beneficial to further miniaturization and weight reduction of the printer.

[0069] Optionally, such as Figure 6 As shown, the limiting part 43 includes a pressure-bearing section 44, a limiting section 45, and a guide section 46 connected in sequence, with the guide section 46 located at the outermost end of the movable end; the side wall of the metal bracket 32 ​​is provided with a guide groove 324 corresponding to the groove opening of the slot 33, and the guide section 46 extends at least partially into the guide groove 324. When the limiting part 43 moves to the outside of the slot 33, the guide section 46 can move in the guide groove 324 along the moving direction of the limiting part 43; the pressure-bearing section 44 is used to guide the connecting rod 22 to be inserted into the slot 33, and when the connecting rod 22 is inserted into the slot 33, the limiting section 45 is used to restrict the connecting rod 22 from being dislodged from the slot 33.

[0070] Specifically, in this embodiment, the integral molding structure of the elastic element 4 makes it easier to form the pressure-bearing section 44, the limiting section 45, and the guiding section 46, reducing the manufacturing difficulty of the elastic element 4. The pressure-bearing section 44 extends along the opening of the slot 33 towards the side wall away from the slot 33, forming an oblique guiding structure. When the connecting rod 22 is pressed against the pressure-bearing section 44 by the cover plate 21, it can be guided to the inside of the slot 33, improving the smoothness of the cover plate assembly 2's movement. Furthermore, the limiting section 45 is connected to the pressure-bearing section 44, extending from the side wall away from the slot 33 towards the side wall closer to the slot 33. This allows the limiting part 43 to form a space between itself and the bottom of the slot 33 to accommodate the end of the connecting rod 22. When the end of the connecting rod 22 is embedded inside the slot 33, the limiting section 45 prevents the connecting rod 22 from dislodging from the limiting groove, improving the reliability of the structure.

[0071] Furthermore, in practical applications, by adjusting the magnitude of the rebound force of the elastic element 4, and by matching the dimensions of the connecting rod 22 and the slot 33, the limiting part 43 can be pressed against the connecting rod 22 when the end of the connecting rod 22 is located inside the slot 33, thereby further preventing the connecting rod 22 from shaking inside the slot 33.

[0072] In addition, the limiting part 43 also includes a guide section 46 located at the outermost end of the movable end. The guide section 46 is located at the opening of the slot 33, and the metal bracket 32 ​​is provided with a guide groove 324 corresponding to the opening to accommodate the guide section. This allows the guide groove 324 to guide the sliding of the guide section 46 when the limiting part 43 moves towards the outside of the slot 33, thereby limiting the movement position of the entire limiting part 43 and preventing the limiting part 43 from deviating from the movement direction during movement. When the limiting part 43 is located inside the slot 33, there is a certain gap between the end of the guide section 46 and the groove wall of the guide groove 324 in the movement direction, so that when the limiting part 43 moves to the outside of the slot 33, the guide section 46 can be completely accommodated in the guide groove 324.

[0073] Optionally, such as Figure 3 As shown, the cover plate assembly 2 also includes a bushing 24 and a transmission gear 25. The transmission gear 25 is fixed to the first end of the connecting rod 22, and the bushing 24 is rotatably connected to the second end of the connecting rod 22. The cover plate 21 is provided with a mounting bracket 27. The two ends of the connecting rod 22 are rotatably mounted on the mounting bracket 27 through the transmission gear 25 and the bushing 24, respectively. The transmission gear 25 is used to connect with the power device 35 to drive the connecting rod 22 to rotate around its own axis.

[0074] Specifically, in this embodiment, both ends of the connecting rod 22 are rotatably mounted on the mounting frame 27 via bushings 24 and transmission gears 25, respectively. This allows one end of the connecting rod 22 to be connected to the power device 35 via the transmission gears 25, thereby enabling the connecting rod 22 to rotate and further drive the rubber roller 23 to rotate. The other end is mounted on the mounting frame 27 via bushings 24, which reduces wear between the connecting rod 22 and the mounting frame 27 and improves the smoothness of the rotation of the connecting rod 22. The two ends of the connecting rod 22 can be engaged into the slots 33 via a portion of the transmission gears 25 and / or a portion of the bushings 24, or they can be engaged into the slots 33 by the connecting rod itself. This invention does not impose any limitations on this.

[0075] Optionally, such as Figure 3 As shown, the transmission gear 25 includes a gear area 251 and a first limiting area 252. The gear area 251 is used to connect the power unit 35. The first limiting area 252 is located on the side of the gear area 251 near the rubber roller 23 and is used for axial limiting of the first end of the connecting rod 22. The bushing 24 has a connecting area 242 and a second limiting area 241. The end of the connecting rod 22 is assembled to the mounting bracket 27 through the connecting area 242. The second limiting area 241 is used for axial limiting of the second end of the connecting rod 22.

[0076] Specifically, in this embodiment, the gear section 251 of the transmission gear 25 is connected to the output end of the power device 35. The rotation of the output end drives the gear section 251, which in turn drives the connecting rod 22 to rotate. The connecting section 242 of the bushing 24 is used to assemble the other end of the connecting rod 22 and the mounting bracket 27, allowing the connecting rod 22 to rotate relative to the mounting bracket 27. At the same time, the cooperation of the first limiting section 252 and the second limiting section 241 at both ends of the connecting rod 22 prevents the connecting shaft from moving freely in its axial direction, thereby improving the accuracy of the position of the rubber roller 23 on the connecting rod 22 and the print head 34 in the printing assembly 3, and ensuring the printing effect.

[0077] In some embodiments, when the cover assembly 2 is in the closed position, the two ends of the connecting rod 22 can be embedded into the two slots 33 through the first limiting area 252 and the second limiting area 241, respectively.

[0078] Optionally, such as Figures 3 to 4 As shown, the printer also includes an unlocking mechanism 5, which is movably mounted on the mounting base 31. The cover plate 21 is provided with an unlocking ramp 26 corresponding to the position of the unlocking mechanism 5. When the cover plate assembly 2 is in the closed position, the unlocking mechanism 5 can act on the unlocking ramp 26, causing the cover plate 21 to drive the end of the connecting rod 22 to press against the limiting part 43, so as to disengage from the slot 33. After the end of the connecting rod 22 disengages from the slot 33, the cover plate assembly 2 is in the open position.

[0079] Specifically, in this embodiment, when the unlocking mechanism 5 acts on the unlocking ramp 26, it can move the connecting rod 22 outward towards the slot 33 by acting on the cover plate 21, thereby moving the cover plate assembly 2 from the closed position to the open position. The unlocking ramp 26 reduces the interaction distance between the unlocking structure and the cover plate assembly 2, allowing the cover plate assembly 2 to be opened with a smaller external force. The unlocking mechanism 5 reduces the difficulty of opening the cover plate assembly 2, making the printer more convenient to use.

[0080] Optionally, such as Figures 3 to 4 As shown, the unlocking mechanism 5 has an initial position and an unlocking position, and has an unlocking end; when the cover plate assembly 2 is in the closed position, the unlocking mechanism 5 can move from the initial position to the unlocking position and protrude from the upper surface of the printing assembly 3, so that the unlocking end can act on the unlocking ramp 26.

[0081] Specifically, in this embodiment, when the unlocking structure is in its initial position, its unlocking end does not interact with the unlocking ramp 26, allowing the cover assembly 2 to remain in the closed position. When it moves to the unlocked position, the unlocking end interacts with the unlocking ramp 26 to open the cover assembly 2. This design further reduces the unlocking distance between the unlocking mechanism 5 and the cover 21. Simultaneously, the unlocking mechanism 5 can be positioned on one or both sides of the slot 33 for user convenience.

[0082] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0083] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A printer, characterized in that, include: A base having a first receiving portion and a second receiving portion in communication, the first receiving portion being used to hold printing paper; A cover plate assembly is rotatably connected to the base and has an open position and a closed position relative to the base. The cover plate assembly includes a cover plate, a connecting rod, and a rubber roller. The connecting rod is rotatably connected to the side of the cover plate near the base, and the rubber roller is disposed on the connecting rod. A printing assembly is located in the second receiving portion and includes a mounting base and a printing module. The mounting base is assembled to the base, and the printing module is assembled to the mounting base. The printing module has slots at both ends corresponding to the connecting rod. An elastic element is fixed to the printing module and extends partially to the inner side of the slot to form a limiting part. When the limiting part is pressed, it can move to the outer side of the slot, so that the connecting rod can be inserted into the slot and is used to prevent the connecting rod from coming out of the slot.

2. The printer according to claim 1, characterized in that, The printing module includes a metal bracket and a print head disposed on the metal bracket, and the elastic element and the slot are both disposed on the metal bracket; When the cover plate assembly is in the closed position, the printing surface of the print head faces the first receiving portion and forms a paper feeding channel communicating with the first receiving portion with the rubber roller. The two ends of the connecting rod are respectively engaged in the slot. The connecting rod can cause the rubber roller to drive the printing paper out of the paper feeding channel by rotating.

3. The printer according to claim 2, characterized in that, The metal bracket has sidewalls at both ends corresponding to the print head. The slot and the elastic element are both disposed on the sidewalls. The slot is a U-shaped slot, and the opening and bottom corner of the U-shaped slot are provided with arc-shaped bevels.

4. The printer according to claim 3, characterized in that, The elastic element is integrally bent and formed. The side wall surface of the metal bracket is provided with a groove. At least two protrusions protruding towards the inside of the groove are provided on the side wall of the groove. Each of the protrusions forms a first limiting groove with the bottom wall of the groove. The elastic element is located in the first limiting groove, so that the elastic element is engaged in the groove through the protrusions.

5. The printer according to claim 4, characterized in that, The elastic element includes a fixed end and a movable end, as well as an arc-shaped segment connecting the fixed end and the movable end, and at least a portion of the movable end extends to the inside of the slot to form the limiting portion. A circular boss is also provided on the bottom wall of the groove. The circular boss and the side wall of the groove form a second limiting groove. The arc-shaped segment is located in the second limiting groove, and the fixed end and the movable end are respectively located on both sides of the circular boss. The movable end has a movable gap with one side of the circular boss, and the movable gap allows the limiting part to move to the outside of the slot.

6. The printer according to claim 5, characterized in that, The limiting part includes a pressure section, a limiting section and a guide section connected in sequence, and the guide section is located at the outermost end of the movable end; The side wall of the metal bracket is provided with a guide groove corresponding to the slot opening of the card slot. The guide section extends at least partially into the guide groove. When the limiting part moves to the outside of the card slot, the guide section can move in the guide groove along the moving direction of the limiting part. The pressure section is used to guide the connecting rod to be inserted into the slot, and when the connecting rod is inserted into the slot, the limiting section is used to prevent the connecting rod from coming out of the slot.

7. The printer according to claim 1, characterized in that, The cover plate assembly also includes a bushing and a transmission gear, the transmission gear being fixed to the first end of the connecting rod, and the bushing being rotatably connected to the second end of the connecting rod; The cover plate is provided with a mounting bracket. The two ends of the connecting rod are rotatably mounted on the mounting bracket through the transmission gear and the bushing, respectively. The transmission gear is used to connect with the power device to drive the connecting rod to rotate around its own axis.

8. The printer according to claim 7, characterized in that, The transmission gear includes a gear area and a first limiting area. The gear area is used to connect to the power device, and the first limiting area is located on the side of the gear area near the rubber roller and is used for axial limiting of the first end of the connecting rod. The bushing has a connecting area and a second limiting area. The end of the connecting rod is assembled to the mounting bracket through the connecting area, and the second limiting area is used for axial limiting of the second end of the connecting rod.

9. The printer according to claim 1, characterized in that, It also includes an unlocking mechanism, which is movably mounted on the mounting base, and the cover plate is provided with an unlocking ramp corresponding to the position of the unlocking mechanism; When the cover plate assembly is in the closed position, the unlocking mechanism can act on the unlocking ramp, causing the cover plate to drive the end of the connecting rod to press against the limiting part to disengage from the slot. After the end of the connecting rod disengages from the slot, the cover plate assembly is in the open position.

10. The printer according to claim 9, characterized in that, The unlocking mechanism has an initial position and an unlocking position, and has an unlocking end; When the cover plate assembly is in the closed position, the unlocking mechanism can move from the initial position to the unlocked position and protrude from the upper surface of the printing assembly, so that the unlocking end can act on the unlocking ramp.

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