Printer

Abstract

The utility model discloses a printer. The printer comprises a base, a cover plate assembly, a printing assembly and a detection module. The cover plate assembly is rotationally connected to the base, has an opening position and a closing position, and comprises a cover plate, a connecting rod and a rubber roller; the printing assembly is arranged on the base and comprises a printing head and a clamping structure, when the cover plate assembly is located at the closing position, the connecting rod is clamped into the clamping structure, and the printing head and the rubber roller form a paper feeding channel communicating with the first containing part; the detection module comprises a mechanical sensor and a photoelectric sensor, under the condition that the cover plate assembly is located at the closing position and the printing paper passes through the paper feeding channel, the connecting rod triggers the mechanical sensor, and light beams emitted by the photoelectric sensor can be shielded by the printing paper.

Description

Technical Field

[0001] This application belongs to the field of printing equipment technology, and specifically relates 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 businesses in the food and beverage industry with high volumes of takeout orders. Unlike regular commercial printers and POS printers, express printers designed for the takeout business model are characterized by high print volume, variable location, and noisy surrounding environments. Especially in terms of high print volume, due to the large number of takeout orders, the printer frequently needs to be refilled, and the printer cover needs to be opened and closed frequently.

[0004] Current printer cover detection typically relies on the cover itself for detection, lacking the ability to detect whether the paper is properly positioned, resulting in insufficient overall accuracy. If the cover is not properly closed, triggering the paper feed motor or printhead heating could damage the equipment or injure the user. Therefore, it is necessary to improve the printer's detection accuracy. Utility Model Content

[0005] This application aims to provide a printer that addresses at least one of the problems in the background art.

[0006] According to a first aspect of this application, a printer is provided, comprising:

[0007] A base having a first receiving portion for holding printing paper;

[0008] 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.

[0009] A printing assembly is disposed on the base and includes a print head and a locking structure. When the cover assembly is in the closed position, the connecting rod is engaged with the locking structure. The print head and the rubber roller form a paper feeding channel communicating with the first receiving part. The connecting rod can drive the rubber roller to rotate so that the printing paper passes through the paper feeding channel.

[0010] The detection module includes a mechanical sensor and a photoelectric sensor. When the cover plate assembly is in the closed position and the printing paper passes through the paper feed channel, the connecting rod can press against and trigger the mechanical sensor, and the light beam emitted by the photoelectric sensor can be blocked by the printing paper.

[0011] Optionally, the printing assembly further includes a mounting base and a printing bracket, wherein the engaging structure and the print head are both disposed on the printing bracket, and the printing bracket is detachably fixed to the base via the mounting base;

[0012] The pressure head of the mechanical sensor is disposed within the engaging structure, and the photoelectric sensor is disposed at the position of the printing bracket corresponding to the rubber roller.

[0013] Optionally, the engaging structure includes two slots and an elastic element. The two slots are disposed on the printing bracket at positions corresponding to the two ends of the connecting rod. The elastic element is fixed to the printing bracket and extends partially to the inner side of the slot to form a limiting part. Under the action of external force, the limiting part can move to the outer side of the slot.

[0014] The pressure head is located at the bottom of one of the slots. When the connecting rod is inserted into the slot, the limiting part can make the connecting rod press against the pressure head and prevent the connecting rod from coming out of the slot.

[0015] Optionally, the elastic element is integrally bent and formed, with one end of the elastic element fixed to the printing bracket and the other end extending to the inside of the slot to form the limiting part.

[0016] Optionally, the printing assembly further includes a guide plate, which is fixed to the printing bracket and located on the side of the print head near the first receiving portion. The guide plate has a through hole through which the light beam emitted by the photoelectric sensor can pass.

[0017] Optionally, two through holes are provided and symmetrically located at both ends of the paperboard, and the light beam emitted by the photoelectric sensor can pass through one of the through holes.

[0018] Optionally, the printing assembly further includes a control module, a drive component, and a transmission component. The drive component is disposed on the printing bracket, and the transmission component is connected to the output end of the drive component. The drive component, the mechanical sensor, and the photoelectric sensor are all connected to the control module.

[0019] When the cover plate assembly is in the closed position, the drive member can drive the connecting rod to rotate via the transmission member, and the control module can control the working state of the drive member based on the detection results of the mechanical sensor and the photoelectric sensor; and / or

[0020] The printhead is a thermal printhead, which is connected to the control module. The control module can also control the working state of the printhead based on the detection results of the mechanical sensor and the photoelectric sensor.

[0021] Optionally, both the mechanical sensor and the photoelectric sensor are disposed on the print holder near the first end of the print head, and the drive unit is disposed on the print holder near the second end of the print head.

[0022] Optionally, the printer also includes an alarm device connected to the control module, which can control the working state of the alarm device based on the detection results of the mechanical sensor and / or the photoelectric sensor.

[0023] Optionally, the printer further includes an unlocking mechanism disposed on the mounting base, which enables the cover assembly to be in the open position when the cover assembly is in the closed position.

[0024] In the embodiments of this application, by setting a locking structure, a mechanical sensor and a photoelectric sensor, the mechanical sensor can be triggered when the connecting rod is locked into the locking structure, thereby determining whether the cover assembly is in the closed position. Furthermore, by determining whether the light beam emitted by the photoelectric sensor is blocked by the printing paper, it is possible to determine whether there is paper in the paper path, thereby improving the accuracy of the cover assembly's closing state and whether the printer is out of paper, and improving the printer's safety performance.

[0025] 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

[0026] 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:

[0027] Figure 1 This is a schematic diagram of the internal structure of the printer provided by this utility model;

[0028] Figure 2 This is an assembly diagram of the cover plate assembly and the base provided by this utility model;

[0029] Figure 3This is a schematic diagram of the printing component provided by this utility model;

[0030] Figure 4 This is a schematic diagram showing the assembly of the elastic element and mechanical sensor provided by this utility model with the printing bracket.

[0031] Figure label:

[0032] 1. Base; 11. First receiving part; 12. Second receiving part; 2. Cover plate assembly; 21. Cover plate; 22. Connecting rod; 23. Glue roller; 24. Transmission component; 3. Printing assembly; 31. Mounting base; 32. Printing bracket; 33. Slot; 34. Print head; 35. Drive component; 36. Straightening plate; 361. Through hole; 4. Elastic component; 41. Limiting part; 5. Unlocking mechanism; 6. Mechanical sensor; 61. Pressure head; 7. Photoelectric sensor. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] The following is combined Figures 1-4 A printer according to an embodiment of this application is described.

[0038] like Figures 1 to 4 As shown, according to a first aspect of this application, a printer is provided, including: a base 1, a cover assembly 2, a printing assembly 3, and a detection module; the base 1 has a first receiving portion 11 for placing printing paper; the cover 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 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 disposed on the base 1, and... The system includes a printhead 34 and a locking structure. When the cover assembly 2 is in the closed position, the connecting rod 22 engages with the locking structure, and the printhead 34 and the rubber roller 23 form a paper feeding channel communicating with the first receiving part 11. The connecting rod 22 can drive the rubber roller 23 to rotate so that the printing paper passes through the paper feeding channel. The detection module includes a mechanical sensor 6 and a photoelectric sensor 7. When the cover assembly 2 is in the closed position and the printing paper passes through the paper feeding channel, the connecting rod 22 can press against and trigger the mechanical sensor 6, and the light beam emitted by the photoelectric sensor 7 can be blocked by the printing paper.

[0039] Specifically, the printer provided in this application has a cover assembly 2 and a base 1. The cover assembly 2 can be rotated to be in an open or closed position relative to the base 1. When the cover assembly 2 is in the open position, the user can perform operations such as changing paper or maintenance. When the cover assembly 2 is in the closed position, the printer can perform printing. The rubber roller 23 and the print head 34 cooperate to form a paper feeding channel. When the rubber roller 23 rotates under the drive of the connecting rod 22, it can drive the printing paper through the paper feeding channel. At the same time, the print head 34 can print on the printing paper, realizing the entire printing process.

[0040] In the above embodiments, this application, through the cooperation of the detection component and the snap-fit ​​structure, enables the connecting rod 22 to press and trigger the mechanical sensor 6 when the cover assembly 2 is in the closed position, so that the printer can detect the closed state of the cover assembly 2. In addition, when the printing paper passes through the paper feed channel, it can block the light beam emitted by the photoelectric sensor 7, so that the printer can detect whether the printer is out of paper. Thus, through the dual detection of the mechanical sensor 6 and the photoelectric sensor 7, it is ensured that the printer can print when the cover assembly 2 is in the closed position and there is enough printing paper, thereby improving the safety of printer operation.

[0041] Furthermore, the mechanical sensor 6 has a simple structure and high reliability. It detects whether the cover assembly 2 is in the closed position, and the connecting rod 22 presses against and triggers the mechanical sensor 6, making the detection data on whether the cover assembly 2 is closed more accurate. For example, the mechanical sensor 6 uses a microswitch. By placing the pressure head 61 of the microswitch in the locking structure, the connecting rod 22 can press against the pressure head 61 after being engaged in the locking structure, thereby triggering the microswitch. In other words, closing the cover assembly 2 triggers the mechanical sensor 6, improving the accuracy of its detection results.

[0042] In addition, the photoelectric sensor 7 achieves its detection purpose by emitting a light beam and detecting the reflected or blocked light signal, converting it into an electrical signal output. The photoelectric sensor 7 is used to detect whether the printer is out of paper. It can determine whether there is paper obstruction by detecting whether the emitted light beam (e.g., visible light or infrared light) is reflected, thus improving the accuracy of the detection. Since the photoelectric sensor 7 needs to detect whether it is obstructed by paper rather than other objects, it can be placed within the paper feed path, i.e., the inevitable path of the paper, improving the reliability of the detection. The specific design can be tailored to the specific form of the printer and is not limited here.

[0043] In practical applications, the photoelectric sensor 7 can also be replaced by a light sensor. A light sensor is a sensor that can sense light intensity and convert it into an electrical signal. It is mainly used to detect changes in ambient light. Applying it to this embodiment, it can detect whether the light is blocked by printing paper by sensing light intensity, exhibiting high sensitivity and accuracy. Furthermore, in practical applications, the light intensity sensed by the light sensor differs depending on whether the cover assembly 2 is in the closed or open position, allowing the light sensor to detect both paper shortage and whether the cover assembly is closed, further improving the accuracy and reliability of the detection.

[0044] Optionally, such as Figures 1 to 3As shown, the printing assembly 3 also includes a mounting base 31 and a printing bracket 32. The locking structure and the print head 34 are both mounted on the printing bracket 32. The printing bracket 32 ​​is detachably fixed to the base 1 via the mounting base 31. The pressure head 61 of the mechanical sensor 6 is located in the locking structure, and the photoelectric sensor 7 is located on the printing bracket 32 ​​at the position corresponding to the rubber roller 23.

[0045] Specifically, in this embodiment, the printing bracket 32 ​​is detachably mounted on the base 1 via the mounting base 31, facilitating disassembly and repair of the printing assembly 3 in case of malfunction. Simultaneously, the printing bracket 32 ​​allows both the locking structure and the print head 34 to be mounted on it, facilitating the engagement of the connecting rod 22 with the locking structure. Furthermore, the pressure head 61 of the mechanical sensor 6 can also be located inside the locking structure, so that when the cover assembly 2 is in the closed position, the connecting rod 22 can simultaneously engage with the locking structure and trigger the mechanical sensor 6. The printing bracket 32 ​​can be made of metal, improving the reliability of the printing assembly 3 structure.

[0046] In practical applications, the locking structure can be a structural feature formed on the print holder 32 or a separate locking component. The specific design can be customized based on factors such as the position of the connecting rod 22 and the ease of opening and closing the cover assembly 2; this application does not impose any limitations on this. Additionally, a second receiving portion 12 communicating with the first receiving portion 11 can be provided on the base to accommodate the print assembly 3. Furthermore, the print head 34 can be mounted on the print holder 32 via an elastic structure such as a spring, allowing the pressure between the roller 23 and the print head 34 to be adjustable. This improves the uniformity of pressure on different parts of the paper in the paper feed path, avoiding problems such as blurry printing caused by uneven pressure on the paper, and thus improving print quality.

[0047] Optionally, such as Figures 3 to 4 As shown, the engaging structure includes two slots 33 and an elastic element 4. The two slots 33 are located on the printing bracket 32 ​​at positions corresponding to the two ends of the connecting rod 22. The elastic element 4 is fixed to the printing bracket 32 ​​and extends partially to the inner side of the slot 33 to form a limiting part 41. Under the action of external force, the limiting part 41 can move to the outer side of the slot 33. The pressure head 61 is located at the bottom of one of the slots 33. When the connecting rod 22 is engaged in the slot 33, the limiting part 41 can make the connecting rod 22 press against the pressure head 61 and restrict the connecting rod 22 from coming out of the slot 33.

[0048] Specifically, in this embodiment, the locking structure includes two slots 33 formed on the printing bracket 32 ​​and an elastic member 4 disposed on one side of the slots 33. When the cover assembly 2 is in the closed position, both ends of the connecting rod 22 can be locked into the slots 33 and pressed and restrained within the slots 33 by the elastic member 4. The pressure head 61 of the mechanical sensor 6 is disposed at the bottom of the slots 33, so that when the connecting rod 22 is restrained within the slots 33, it can simultaneously press and trigger the mechanical sensor 6. This improves both the structural rationality and the reliability of the mechanical sensor 6 triggering. Furthermore, the slots 33 also provide some protection for the pressure head 61, preventing accidental activation and further improving the reliability of the detection results.

[0049] In some embodiments, two mechanical sensors 6 can be provided, with each sensor 6 positioned at the bottom of one of the two slots 33. This ensures that even if one sensor fails, the printer can still detect the closed state of the cover assembly 2, further improving the reliability of the detection results. Furthermore, the elastic element 4 serves two purposes: firstly, it prevents the connecting rod 22 from disengaging from the slot 33; secondly, it can move outwards from the slot 33 under external force. This allows the user to simply press down the cover 21, causing the connecting rod 22 to press against the elastic element 4 and engage with the slot 33, thus closing the cover without the need for external structural assistance and improving the ease of printer operation.

[0050] Optionally, such as Figure 4 As shown, the elastic element 4 is integrally bent and formed. One end of the elastic element 4 is fixed to the printing bracket 32, and the other end extends to the inside of the slot 33 to form a limiting part 41.

[0051] 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 print holder 32. In practical applications, the slots 33 can be set on the side walls of the print holder 32 corresponding to both ends of the print head 34. Two elastic elements 4 are provided, respectively set on one side of the two slots 33. When the two ends of the connecting rod 22 are inserted into the slots 33, the limiting parts 41 of the elastic elements 4 at both ends simultaneously restrict the connecting rod 22 from disengaging and apply a pressure to the connecting rod 22, so that the connecting rod 22 can press against the pressure head 61 of the mechanical sensor 6. This design simplifies the internal structure of the printer and realizes the working cooperation between the connecting rod 22, the locking structure and the mechanical sensor 6.

[0052] Optionally, such as Figure 3As shown, the printing assembly 3 also includes a paperboard 36, which is fixed on the printing bracket 32 ​​and located on the side of the print head 34 near the first receiving portion 11. The paperboard 36 is provided with a through hole 361, through which the light beam emitted by the photoelectric sensor 7 can pass.

[0053] Specifically, in this embodiment, the guide plate 36 is typically fixed to the printing bracket 32, corresponding to one side of the print head 34, to guide the printing paper from the first receiving part 11 into the paper feeding channel and out of the paper feeding channel. The arrangement of the guide plate 36 improves the smoothness of the printer's paper feeding. Furthermore, the photoelectric sensor 7 is positioned on the printing bracket 32 ​​at the position corresponding to the rubber roller 23, and the guide plate 36 covers the photoelectric sensor 7. By providing a through hole 361 on the guide plate 36, the light beam emitted by the photoelectric sensor 7 can smoothly pass through the guide plate 36 and then illuminate the printing paper in the paper feeding channel, thereby realizing the detection of the printing paper.

[0054] In the above embodiments, the arrangement of the paper guide 36 simultaneously protects the photoelectric sensor 7 from being scratched by the printing paper, thereby improving the reliability and lifespan of the photoelectric sensor 7. The size and position of the through-hole 361 can be customized to match the specific form of the photoelectric sensor 7.

[0055] Optionally, such as Figure 3 As shown, there are two through holes 361, which are symmetrically located at both ends of the paperboard 36. The light beam emitted by the photoelectric sensor 7 can pass through one of the through holes 361.

[0056] Specifically, in this embodiment, two through holes 361 are provided on the paper guide 36, symmetrically located at both ends of the paper guide 36. This allows for more flexible placement of the photoelectric sensor 7. The photoelectric sensor 7 can be positioned closer to one side according to actual product requirements, avoiding interference with the wiring or structure of other electronic devices and facilitating the installation of the paper guide 36. In some embodiments, two photoelectric sensors 7 can be selectively provided, with the light beams emitted by the two sensors passing through two separate through holes 361. This prevents one sensor from failing and improves the reliability of paper shortage detection.

[0057] Optionally, such as Figure 3 and Figure 4As shown, the printing assembly 3 also includes a control module, a drive component 35, and a transmission component 24. The drive component 35 is disposed on the printing bracket 32, and the transmission component 24 is connected to the output end of the drive component 35. The drive component 35, the mechanical sensor 6, and the photoelectric sensor 7 are all connected to the control module. When the cover assembly 2 is in the closed position, the drive component 35 can drive the connecting rod 22 to rotate through the transmission component 24. The control module can control the working state of the drive component 35 according to the detection results of the mechanical sensor 6 and the photoelectric sensor 7.

[0058] Specifically, in this embodiment, the control module can control the working state of the drive component 35, thereby enabling the drive component 35 to rotate the connecting rod 22 through the transmission component 24, thus driving the rubber roller 23 to rotate, so that the printer can feed the printing paper through the rubber roller 23 during the printing process. The control module is connected to both the mechanical sensor 6 and the photoelectric sensor 7. When the mechanical sensor 6 is not triggered by the connecting rod 22, and / or the photoelectric sensor 7 is not blocked by the printing paper, the control module can control the drive component 35 to standby or not start based on these detection results, thus preventing users from printing with the cover open or when paper is out, improving printer safety.

[0059] In practical applications, when the mechanical sensor 6 is triggered and the photoelectric sensor 7 is blocked by the printing paper, the control module can control the drive component 35 to start, and then drive the connecting rod 22 to rotate through the transmission component 24, so that the rubber roller 23 can drive the printing paper to feed, without affecting the normal printing process.

[0060] In another embodiment, the printhead 34 is a thermal printhead 34, which is connected to the control module. The control module can also control the working state of the printhead 34 based on the detection results of the mechanical sensor 6 and the photoelectric sensor 7. That is, when the mechanical sensor 6 is not triggered by the connecting rod 22, and / or the photoelectric sensor 7 is not blocked by the printing paper, the control module can control the printhead 34 not to heat up based on this detection result, so as to prevent the user from printing with the cover open or when there is no paper, further improving the safety of the printer. In addition, when the mechanical sensor 6 is triggered and the photoelectric sensor 7 is blocked by the printing paper, it indicates that normal printing is possible. The control module can then control the drive component 35 to start, which in turn drives the connecting rod 22 to rotate through the transmission component 24, so as to achieve the purpose of the rubber roller 23 driving the printing paper to feed.

[0061] Optionally, such as Figure 3 As shown, mechanical sensor 6 and photoelectric sensor 7 are both located on the print holder 32 near the first end of print head 34, and drive unit 35 is located on the print holder 32 near the second end of print head 34.

[0062] Specifically, in this embodiment, the mechanical sensor 6 and the photoelectric sensor 7 are disposed at the same end of the print head 34, and the drive unit 35 is disposed at the other end of the print head 34. This facilitates the connection between the entire detection module and the control module, simplifying wiring. Furthermore, it avoids interference with the wiring of the drive unit 35, thus improving the reliability of the printer control circuit. In practical applications, either the mechanical sensor 6 or the photoelectric sensor 7 can be disposed at the same end of the print head 34 as the drive unit 35, depending on actual needs; no further restrictions are imposed.

[0063] Optionally, the printer also includes an alarm device connected to the control module, which can also control the working status of the alarm device based on the detection results of the mechanical sensor 6 and / or the photoelectric sensor 7.

[0064] Specifically, in this embodiment, an alarm device is installed to promptly alert the user if the printer malfunctions, such as running out of paper or the cover not being closed, thereby improving printer safety. The alarm device can be a voice module to alert the user via voice prompts about paper shortages or printing failures, or it can be a buzzer or other similar module. Additionally, different light indicators can be used to indicate different printer statuses; for example, LED colors can distinguish between an open cover assembly 2 and a paper shortage, allowing the user to take appropriate action. The specific design is tailored to the actual usage scenario of the printer and is not limited here.

[0065] Optionally, such as Figure 3 As shown, the printer also includes an unlocking mechanism 5, which is disposed on the mounting base 31. When the cover assembly 2 is in the closed position, the unlocking mechanism 5 can enable the cover assembly 2 to be in the open position.

[0066] In this embodiment, the unlocking mechanism 5 can move the connecting rod 22 outward from the slot 33 by acting on the cover plate 21 or the connecting rod 22, thereby moving the cover plate assembly 2 from the closed position to the open position. The unlocking mechanism 5 reduces the difficulty of opening the cover plate assembly 2, making the printer more convenient to use. In practical applications, the distance at which the unlocking mechanism 5 acts on the cover plate assembly 2 can be reduced by setting an unlocking ramp on the cover plate 21, further improving the convenience of unlocking.

[0067] 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.

[0068] 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 for holding 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 disposed on the base and includes a print head and a locking structure. When the cover assembly is in the closed position, the connecting rod is engaged with the locking structure. The print head and the rubber roller form a paper feeding channel communicating with the first receiving part. The connecting rod can drive the rubber roller to rotate so that the printing paper passes through the paper feeding channel. The detection module includes a mechanical sensor and a photoelectric sensor. When the cover plate assembly is in the closed position and the printing paper passes through the paper feed channel, the connecting rod can press against and trigger the mechanical sensor, and the light beam emitted by the photoelectric sensor can be blocked by the printing paper.

2. The printer according to claim 1, characterized in that, The printing assembly also includes a mounting base and a printing bracket. The engaging structure and the print head are both disposed on the printing bracket, and the printing bracket is detachably fixed to the base via the mounting base. The pressure head of the mechanical sensor is disposed within the engaging structure, and the photoelectric sensor is disposed at the position of the printing bracket corresponding to the rubber roller.

3. The printer according to claim 2, characterized in that, The engaging structure includes two slots and an elastic element. The two slots are disposed on the printing bracket at positions corresponding to the two ends of the connecting rod. The elastic element is fixed to the printing bracket and extends partially to the inner side of the slot to form a limiting part. Under the action of external force, the limiting part can move to the outer side of the slot. The pressure head is located at the bottom of one of the slots. When the connecting rod is inserted into the slot, the limiting part can make the connecting rod press against the pressure head and prevent the connecting rod from coming out of the slot.

4. The printer according to claim 3, characterized in that, The elastic element is integrally bent and formed. One end of the elastic element is fixed to the printing bracket, and the other end extends to the inside of the slot to form the limiting part.

5. The printer according to claim 2, characterized in that, The printing assembly also includes a guide plate, which is fixed to the printing bracket and located on the side of the print head near the first receiving portion. The guide plate has a through hole through which the light beam emitted by the photoelectric sensor can pass.

6. The printer according to claim 5, characterized in that, Two through holes are provided and symmetrically located at both ends of the paperboard, and the light beam emitted by the photoelectric sensor can pass through one of the through holes.

7. The printer according to claim 2, characterized in that, The printing assembly further includes a control module, a drive component, and a transmission component. The drive component is disposed on the printing bracket, and the transmission component is connected to the output end of the drive component. The drive component, the mechanical sensor, and the photoelectric sensor are all connected to the control module. When the cover plate assembly is in the closed position, the drive member can drive the connecting rod to rotate via the transmission member, and the control module can control the working state of the drive member based on the detection results of the mechanical sensor and the photoelectric sensor; and / or The printhead is a thermal printhead, which is connected to the control module. The control module can also control the working state of the printhead based on the detection results of the mechanical sensor and the photoelectric sensor.

8. The printer according to claim 7, characterized in that, Both the mechanical sensor and the photoelectric sensor are located on the printing bracket near the first end of the print head, and the driving component is located on the printing bracket near the second end of the print head.

9. The printer according to claim 7, characterized in that, It also includes an alarm device, which is connected to the control module. The control module can also control the working state of the alarm device based on the detection results of the mechanical sensor and / or the photoelectric sensor.

10. The printer according to claim 2, characterized in that, It also includes an unlocking mechanism disposed on the mounting base, which enables the cover assembly to be in the open position when the cover assembly is in the closed position.

Images