Handheld Printer

Abstract

A handheld printer relates to the technical field of printers, and the handheld printer comprises: a housing, an ink cartridge, a main roller, a main control board and an FPC device; the FPC device comprises a flexible circuit board; the main control board and the flexible circuit board are both installed in the housing, the ink cartridge can be placed inside the housing, the flexible circuit board is electrically connected to the main control board, and the flexible circuit board can be electrically connected to the ink cartridge; the flexible circuit board integrates a print drive module, a position sensor module and an ink cartridge identification module; the main roller is connected to the housing, and the main roller is connected to a magnet, and the magnet is arranged relative to a Hall element in the position sensor module. The print drive module, the position sensor module and the ink cartridge identification module in the handheld printer are all integrated on a flexible circuit board, which improves space utilization, reduces the number of wiring, reduces assembly complexity, and improves production efficiency.

Description

Technical Field

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

[0002] At present, handheld small printers are used in more and more scenarios due to their light weight, small size, portability, and convenient printing. A traditional handheld small printer includes a housing, in which a main control board, an ink cartridge, and a circuit board are arranged. The circuit board is connected to the main control board and the ink cartridge respectively to drive the ink cartridge to print.

[0003] In the prior art, a circuit board is usually used as a carrier of the position sensor module and the ink cartridge identification module, and is connected to the main control board by wiring.

[0004] However, due to limitations in the internal structure of the printer, the position sensor module and the ink cartridge identification module need to be installed in different positions. Therefore, the installation requirements can only be met by setting up multiple circuit boards. The circuit boards are connected to the main control board through wiring. The increase in the number of circuit boards leads to an increase in the number of wiring inside the printer housing, and the lines are tangled and confusing. Errors are prone to occur during assembly and wiring, which can cause hardware damage and affect production efficiency. Summary of the invention

[0005] The object of the present invention is to provide a handheld printer which can solve the above technical problems to a certain extent.

[0006] The present invention is achieved in that:

[0007] A handheld printer, comprising: a housing, an ink cartridge, a main roller, a main control board and an FPC device;

[0008] The FPC device includes a flexible circuit board;

[0009] The main control board and the flexible circuit board are both installed in the housing, the ink cartridge can be placed inside the housing, the flexible circuit board is electrically connected to the main control board, and the flexible circuit board can be electrically connected to the ink cartridge;

[0010] The flexible circuit board is integrated with a print drive module, a position sensor module and an ink cartridge identification module;

[0011] The main roller is rotatably connected to the housing, and the main roller is connected to a magnet, and the magnet is arranged opposite to the Hall element in the position sensor module.

[0012] In a feasible implementation, the FPC device also includes a fixing plate, the flexible circuit board is connected to the housing via the fixing plate, the main roller is rotatably connected to the fixing plate, and the main roller is assembled to the housing via the fixing plate.

[0013] In a feasible implementation scheme, the FPC device also includes a support plate, a flexible pad and a first elastic member, the flexible circuit board is fixed to the side of the support plate facing away from the fixed plate, the flexible pad is spaced between the support plate and the flexible circuit board, the support plate can move relative to the fixed plate, the first elastic member is arranged between the fixed plate and the support plate, and the fixed plate is connected to the casing.

[0014] In a feasible implementation, the handheld printer further includes a nozzle protection cover, a first cover opening detection device and an early warning device;

[0015] The nozzle of the ink cartridge is opposite to the ink jet port of the housing, and the nozzle protection cover is used to cover the nozzle;

[0016] The first cover opening detection device is used to detect whether the nozzle protection cover is covering the nozzle;

[0017] The main control board is respectively connected to the first cover opening detection device and the early warning device for controlling. When the nozzle protection cover is not covered on the nozzle for more than a set time, the early warning device sends out an early warning signal.

[0018] In a feasible implementation, the handheld printer also includes a cover body, a second cover opening detection device and an early warning device, the housing has an opening, the opening is used for the ink cartridge to be inserted into the interior of the housing, the cover body is used to cover the opening, the second cover opening detection device is used to detect whether the cover body covers the ink cartridge, the main control board is controlled and connected to the second cover opening detection device, when the cover body does not cover the ink cartridge, the main control board blocks the ink cartridge from printing, and the early warning device sends a early warning signal.

[0019] In a feasible implementation manner, the second cover opening detection device includes a second detection switch and a second trigger member, the second trigger member is arranged on the cover body, and the second detection switch is arranged on the main control board.

[0020] In a feasible embodiment, the handheld printer also includes a detachable device, the first side of the housing is provided with a protrusion, the protrusion is provided with an inkjet port, the nozzle of the ink cartridge is arranged opposite to the inkjet port, the main roller is arranged on the protrusion, the detachable device is provided with an auxiliary roller, the detachable device is detachably connected to the first side of the housing, and the nozzle protection cover can be covered on the protrusion and the detachable device.

[0021] In a feasible implementation, the main control board is integrated with a reset module, the housing is provided with a reset switch, the reset switch is connected to the reset module, and the reset module is used to restart the main control board.

[0022] In a feasible implementation scheme, the main control board is also integrated with a communication module, and the communication module is used for data transmission with the terminal device.

[0023] In a feasible implementation, one end of the cover is hinged to the casing, and the other end is connected to the casing via a snap structure. The casing is provided with a cover opening button, and the cover opening button is connected to the snap structure for unlocking the snap structure.

[0024] In a feasible implementation manner, a receiving groove is provided on a side of the main roller facing the Hall element, and the magnet is embedded in the receiving groove.

[0025] The beneficial effects of the present invention include at least:

[0026] The handheld printer provided in the present application includes: a housing, an ink cartridge, a main roller, a main control board and an FPC device, wherein the FPC device includes a flexible circuit board; the main control board and the flexible circuit board are both installed in the housing, the ink cartridge can be placed inside the housing, the flexible circuit board is electrically connected to the main control board, and the flexible circuit board can be electrically connected to the ink cartridge; the flexible circuit board integrates a print drive module, a position sensor module and an ink cartridge identification module; the main roller is rotatably connected to the housing, and the main roller is connected to a magnet, and the magnet is arranged relative to the Hall element. Since the print drive module, the position sensor module and the ink cartridge identification module are all integrated on a flexible circuit board, and since the flexible circuit board has a certain deformation amount, the position sensor and the print drive module can be placed freely in the structural design, the space utilization rate can be improved, the number of wiring can be reduced, the assembly complexity can be reduced, and the production efficiency can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0028] Figure 1 A schematic diagram of the structure of a handheld printer provided by an embodiment of the present invention when the cover is closed;

[0029] Figure 2 An exploded view of a handheld printer provided by an embodiment of the present invention;

[0030] Figure 3 A schematic diagram of the structure of a handheld printer provided by an embodiment of the present invention when the cover is opened;

[0031] Figure 4 Schematic diagram of the internal structure of a handheld printer provided in an embodiment of the present invention Figure 1 ;

[0032] Figure 5 Schematic diagram of the internal structure of a handheld printer provided in an embodiment of the present invention Figure 2 ;

[0033] Figure 6 An exploded view of an FPC device in a handheld printer provided by an embodiment of the present invention;

[0034] Figure 7 An exploded view of the parts of the base of the handheld printer provided in an embodiment of the present invention;

[0035] Figure 8 An exploded view of the parts of a detachable device in a handheld printer provided in an embodiment of the present invention;

[0036] Fig. 9 A schematic diagram of the structure of a cover body in a handheld printer provided in an embodiment of the present invention;

[0037] Fig.10 Explosion of parts of the housing of the handheld printer provided by the embodiment of the present invention Figure 1 ;

[0038] Fig.11 A partial cross-sectional view of a handheld printer provided by an embodiment of the present invention;

[0039] Fig.12 Explosion of parts of the housing of the handheld printer provided by the embodiment of the present invention Figure 2 ;

[0040] Fig.13 A schematic diagram of the structure of a main control board in a handheld printer provided in an embodiment of the present invention;

[0041] Fig.14 A schematic structural diagram of a silk-screen printing plate in a handheld printer provided in an embodiment of the present invention.

[0042] In the figure:

[0043] 100-housing; 102-printing button; 103-printer housing; 104-printer inner housing; 105-screen printing board; 106-reset switch through hole; 107-light-transmitting area of ​​working status indicator light; 108-light-transmitting area of ​​WiFi indicator light; 109-bottom shielding sheet; 110-opening button; 111-third elastic member; 112-opening button limiter; 120-battery; 130-electric control module; 131-main control board; 132-type-c board; 133-first detection switch; 134-second detection switch; 200-FPC device; 210-flexible circuit board; 211-Hall element; 220-flexible pad; 230-support plate; 240-fixed plate ;250-main roller;252-bearing;253-rubber ring;254-magnet;260-first elastic member;300-ink cartridge;321-top column;322-top column mounting plate;323-second elastic member;400-detachable device;411-auxiliary roller;420-shell;440-buckle plate;460-first buckle;470-fourth elastic member;480-first magnetic member;500-nozzle protection cover;501-protection cover outer shell;502-protection cover inner shell;503-second magnetic member;504-protective cover;505-first trigger member;600-cover body;601-steel shaft;602-steel shaft limit block;603-reset spring;604-second trigger member. DETAILED DESCRIPTION

[0044] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0045] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0046] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0047] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the invention product is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the equipment or components referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0048] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0049] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] Some embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0051] First embodiment

[0052] Please refer to Figure 1-Figure 14The present embodiment provides a handheld printer, which includes: a housing 100, an ink cartridge 300, a main roller 250, a main control board 131 and an FPC device 200; the FPC device 200 includes a flexible circuit board 210; the main control board 131 and the flexible circuit board 210 are both installed in the housing 100, the ink cartridge 300 can be placed inside the housing 100, the flexible circuit board 210 is electrically connected to the main control board 131, and the flexible circuit board 210 can be electrically connected to the ink cartridge 300; the flexible circuit board 210 integrates a print drive module, a position sensor module and an ink cartridge identification module; the main roller 250 is rotatably connected to the housing 100, and the main roller 250 is connected to a magnet 254, and the magnet 254 is arranged opposite to a Hall element 211 in the position sensor module. The Hall element 211 is a magnetic sensor based on the Hall effect. During the printing process, the main roller 250 contacts the medium to be printed (such as paper), so the main roller 250 rotates with the relative movement of the paper and the handheld printer, thereby reflecting the relative movement between the paper and the printer, and transmitting it to the Hall element 211 through the magnet 254, so that the main control board 131 can obtain the relative movement information between the handheld printer and the medium to be printed (the relative movement information may include information such as movement speed and movement position), thereby realizing feedback adjustment.

[0053] The main roller 250 can rotate around its own axis relative to the housing 100. In a specific implementation of this embodiment, the main roller 250 is rotatably connected to the housing 100 via a bearing. The bearing not only ensures that the main roller 250 can rotate relative to the housing 100, but also limits the main roller 250, thereby improving the rotation stability of the main roller 250.

[0054] like Figure 6 As shown, in a preferred embodiment, the FPC device 200 further includes a fixing plate 240 , and the flexible circuit board 210 is connected to the housing 100 via the fixing plate 240 .

[0055] Further, in a feasible embodiment, the main roller 250 may be directly rotatably connected to the housing 100, or, in another feasible embodiment, the main roller 250 is rotatably connected to the fixing plate 240. Since the fixing plate 240 is fixedly connected to the housing 100, the main roller 250 is indirectly connected to the housing 100 through the fixing plate 240, so as to realize the rotatable connection between the main roller 250 and the housing 100. When the main roller 250 is rotatably connected to the fixing plate 240, the main roller 250 is preferably rotatably connected to the fixing plate 240 through a bearing.

[0056] In a feasible implementation manner, the flexible circuit board 210 is directly fixed to the fixing plate 240 , and the fixing plate 240 is fixed to the housing 100 .

[0057] Alternatively, in a preferred embodiment, the FPC device 200 further includes a support plate 230 and a first elastic member 260, the flexible circuit board 210 is fixed to the side of the support plate 230 away from the fixed plate 240, the first elastic member 260 is arranged between the fixed plate 240 and the support plate 230, and the fixed plate 240 is connected to the housing 100. In this arrangement, under the action of the first elastic member 260, the support plate 230 can move within a certain range relative to the fixed plate 240, so as to approach or move away from the fixed plate 240, thereby changing the position of the flexible circuit board 210 installed on the support plate 230 on the inner side of the housing 100, so as to facilitate the effective contact between the flexible circuit board 210 and the ink cartridge 300.

[0058] Preferably, the flexible circuit board 210 is integrally formed with a plurality of first metal contacts, and the ink cartridge 300 is provided with a plurality of second metal contacts, and the first metal contacts can contact the second metal contacts.

[0059] The number of the first metal contacts on the flexible circuit board 210 is greater than or equal to the number of the second metal contacts on the ink cartridge 300. The plurality of first metal contacts can be connected to the plurality of second metal contacts in a one-to-one correspondence. When the number of the first metal contacts is greater than the number of the second metal contacts, in addition to the first metal contacts corresponding to the second metal contacts in a one-to-one correspondence, the other first metal contacts can also be in contact with the metal contacts on other mechanisms (such as an encryption chip).

[0060] Since the first metal contact is integrally formed and arranged on the flexible circuit board 210, the assembly process is simplified, the assembly time is saved, and the assembly efficiency is improved. In the process of installing the ink cartridge 300 into the housing 100, the ink cartridge 300 pushes the support plate 230, so that the support plate 230 moves in the direction close to the fixed plate 240, so as to avoid the ink cartridge 300 from rubbing against the first metal contacts on the flexible circuit board 210 during installation, thereby improving the service life of the handheld printer. When the support plate 230 moves in the direction close to the fixed plate 240, the first elastic member 260 accumulates force. After the ink cartridge 300 moves into place, the first elastic member 260 pushes the support plate 230 in the direction away from the fixed plate 240, so that the flexible circuit board 210 installed on the support plate 230 is effectively in contact with the ink cartridge 300.

[0061] Furthermore, the Hall element 211 in the position sensor module is integrated into the flexible circuit board 210, and a receiving groove is provided on the side of the main roller 250 facing the Hall element 211, and a magnet 254 is installed in the receiving groove, and the magnet 254 is arranged opposite to the Hall element 211. An annular groove is provided on the circumference of the main roller 250, and the rubber ring 253 is sleeved on the main roller 250, and a part of the structure of the rubber ring 253 is embedded in the annular groove.

[0062] During the rotation of the main roller 250, the magnet 254 rotates with the main roller 250, so that the magnetic field of the Hall element 211 changes, so that the rotation speed of the main roller 250 can be detected by the Hall element 211. The Hall element 211 is connected to the control device, and the control device controls the ink jetting speed of the ink cartridge 300 according to the information feedback of the Hall element 211.

[0063] Furthermore, a flexible pad 220 is provided between the flexible circuit board 210 and the support plate 230, and the flexible pad 220 supports and protects the flexible circuit board 210. The flexible pad 220 is made of a flexible material, such as rubber, rubber or resin. On the one hand, the flexible pad 220 can play a role of buffering and shock absorption between the flexible circuit board 210 and the support plate 230, thereby protecting the flexible circuit board 210, and on the other hand, it can support the flexible circuit board 210, so as to facilitate effective contact between the flexible circuit board 210 and the ink cartridge 300.

[0064] In a preferred embodiment, a first metal contact is formed on one side of the flexible circuit board 210, and a depression is formed in the area opposite to the first metal contact on the other side of the flexible circuit board 210. A support protrusion structure is provided on the side of the flexible pad 220 facing the flexible circuit board 210, and the support protrusion structure is provided in a one-to-one correspondence with the first metal contact. When the flexible circuit board 210 and the flexible pad 220 are assembled, the board surface of the flexible circuit board 210 contacts the surface of the flexible pad 220, and the support protrusion structure on the flexible pad 220 extends into the depression formed on the rear side of the corresponding first metal contact, thereby supporting, consolidating and reinforcing the shape of the first metal contact, which is conducive to achieving effective contact between the flexible circuit board 210 and the ink cartridge 300.

[0065] The support plate 230 is provided with a chip slot, and a part of the structure of the Hall element 211 extends into the chip slot. The support plate 230 can move relative to the fixing plate 240, thereby changing the distance between the fixing plate 240 and the flexible circuit board 210, thereby changing the depth of the first metal contact on the flexible circuit board 210 extending into the inside of the housing 100, so that the first metal contact is better in contact with the second metal contact of the ink cartridge 300. The fixing plate 240 is fixed to the housing 100.

[0066] The FPC device 200 is located on a side of the ink cartridge 300 where the second metal contact is provided. On the other side opposite to the ink cartridge 300, the housing 100 is provided with an ink cartridge pushing device, which includes a top column 321, a top column mounting plate 322 and a second elastic member 323. The second elastic member 323 is connected between the top column 321 and the top column mounting plate 322. The top column mounting plate 322 is connected to the housing 100. A protrusion is provided on the top column mounting plate 322. The second elastic member 323 can be a spring. The second elastic member 323 is sleeved on the protrusion. A groove is provided on the side of the top column 321 facing the top column mounting plate 322. One end of the spring and a part of the protrusion extend into the top column 321. When the ink cartridge 300 is placed in the housing 100, the ink cartridge pushing device and the FPC device 200 are respectively located on both sides of the ink cartridge 300. The ink cartridge pushing device pushes the ink cartridge 300 toward the FPC device 200, so that the second metal contact on the ink cartridge 300 is effectively in contact with the first metal contact of the FPC device 200.

[0067] In order to better protect the nozzle of the ink cartridge 300, preferably, the handheld printer also includes a nozzle protection cover 500. The ink cartridge 300 is installed inside the housing 100, and the nozzle of the ink cartridge 300 is opposite to the inkjet port of the housing 100; the nozzle protection cover 500 can cover the nozzle, thereby protecting the nozzle and preventing the ink from drying.

[0068] In order to remind the user to close the nozzle protection cover 500 in time, preferably, the handheld printer also includes a first cover opening detection device and an early warning device; the first cover opening detection device is used to detect whether the nozzle protection cover 500 is covered on the nozzle; the main control board 131 is respectively controlled and connected to the first cover opening detection device and the early warning device, and when the nozzle protection cover 500 is not covered on the nozzle for more than a set time, the early warning device sends a warning signal to remind the user to close the nozzle protection cover 500 to protect the nozzle.

[0069] The handheld printer is provided with a cover 600 . Correspondingly, the housing 100 has an opening for inserting the ink cartridge 300 into the housing 100 . The cover 600 is used to cover the opening.

[0070] Furthermore, in a preferred embodiment, the handheld printer also includes a second cover opening detection device and an early warning device. The main control board 131 is control-connected to the second cover opening detection device. When the cover body 600 is not covered on the ink cartridge 300, the main control board 131 blocks the ink cartridge 300 from printing, and the early warning device sends out an early warning signal.

[0071] Specifically, the main control board 131 blocks the ink cartridge 300 from printing. When the handheld printer is in the printing process, the main control board 131 controls the ink cartridge 300 to stop printing, that is, the handheld printer stops printing. When the handheld printer is in the standby state and is not in the printing process, the main control board 131 controls the ink cartridge 300 to not start the printing function, so that the handheld printer cannot start the printing function to print when the cover body 600 is not installed.

[0072] The second cover opening detection device and the early warning device are electrically connected to the main control board 131 respectively.

[0073] The second cover opening detection device is used to detect whether the cover body 600 covers the opening of the housing 100. When the cover body 600 does not cover the opening of the housing 100 for more than a set time, the main control board 131 controls the handheld printer to stop printing and controls the early warning device to send an early warning signal to remind the user to close the cover body 600. This can prevent the user from pulling out the ink cartridge 300 when the handheld printer is turned on, causing damage to the ink cartridge 300 or short circuit of some modules in the control device.

[0074] In the handheld printer provided in this embodiment, only the first cover opening detection device and its corresponding early warning device may be provided, or only the second cover opening detection device and its corresponding early warning device may be provided, or, preferably, both the first cover opening detection device and its corresponding early warning device and the second cover opening detection device and its corresponding early warning device may be provided, and the early warning device corresponding to the first cover opening detection device and the early warning device corresponding to the second cover opening detection device may be two independent early warning devices, or the same early warning device may be used together.

[0075] In a preferred implementation of the present embodiment, the main control board 131 is integrated with a reset module. Correspondingly, the housing 100 is provided with a reset switch, and the reset switch is connected to the reset module. The reset module is used to restart the main control board 131 .

[0076] In a feasible implementation scheme, the main control board 131 is also integrated with a communication module, and the communication module is used for data transmission with the terminal device.

[0077] Specifically, the terminal device can be a mobile terminal such as a tablet computer or a mobile phone. When the terminal device is a mobile terminal such as a tablet computer or a mobile phone, an application software matching the handheld printer can be added to the terminal device, and the communication module is used for wireless data transmission, so that the user can control, input, view data, etc. through the application software. Furthermore, the early warning device can achieve the purpose of reminding the user by displaying the early warning information on the terminal device, making the terminal device ring, vibrate, etc.

[0078] Specifically, the hardware system of the handheld printer provided in the present application includes an external interface module, a power module and an embedded control module, the embedded control module includes a control device, and the control device includes a printing module, a reset module, a cover opening detection module and a communication module. Among them, the communication module includes a WiFi module and / or a Bluetooth module, which is integrated on the main control board 131.

[0079] The power module is composed of a battery 120 (such as a rechargeable polymer lithium battery) and corresponding circuits and interfaces, wherein the interface and the corresponding circuit are integrated on the main control board 131. The battery 120 is pasted on the inner shell of the casing 100 and connected to the interface on the main control board 131 using wiring to power the handheld printer.

[0080] The external interface module consists of a Type-c interface and corresponding circuits, which are integrated on a separate interface board and connected to the main control board 131 through a pin header. It is used to charge and transmit data to the handheld printer by inserting a Type-c cable into the Type-c interface.

[0081] The printing module includes: a main control chip, a printing control circuit, a position sensor module, a printing drive module and an ink cartridge identification module. Among them, the main control chip and the printing control circuit are integrated on the main control board 131, and the printing drive module and the ink cartridge identification module are integrated on the flexible circuit board 210, which are used to process the printing data transmission, drive the ink cartridge 300 to print, identify the ink cartridge identification chip at the bottom of the ink cartridge 300, and ensure that the customer uses the original quality ink cartridge 300. The position sensor module is composed of a position sensor and a corresponding circuit, wherein the position sensor is integrated on the flexible circuit board 210, connected to the main control board 131 through the wiring on the flexible circuit board 210, and the corresponding circuit is integrated on the main control board 131, which is used to feedback the relative movement information between the handheld printer and the medium to be printed (the relative movement information may include information such as the movement speed and the movement position), and then realize feedback adjustment through the main control board 131. The position sensor includes a Hall element 211.

[0082] The reset module includes a circuit corresponding to the reset switch, which is integrated on the main control board 131 and is used to manually restart the system through the reset switch when the system crashes.

[0083] The cover opening detection module includes a first cover opening detection device, a second cover opening detection device and an early warning device. The early warning device includes a machine status indicator light arranged on the housing 100, or the early warning device may also include a buzzer or a display panel, or the early warning device may be connected to the communication module to perform an early warning operation on the mobile terminal through the communication module. The display panel is a panel capable of displaying information, which may include an OLED display screen or an LCD display screen.

[0084] In a feasible embodiment, the handheld printer also includes a detachable device 400, a protrusion is provided on the first side of the housing 100, the nozzle can be exposed from the protrusion, the protrusion is provided with a main roller 250, the detachable device 400 is provided with an auxiliary roller 411, the detachable device 400 is detachably connected to the first side of the housing 100, and the nozzle protection cover 500 can be covered on the protrusion and the detachable device 400.

[0085] like Figure 8 As shown, the buckle of the detachable device 400 may adopt the following structure:

[0086] The detachable device 400 includes a housing 420, and the housing 420 is provided with a buckle, which is called a first buckle 460. A first slot is provided on the first side of the housing 100, and the first buckle 460 can be engaged with the first slot. The housing 420 includes a bottom housing and a buckle plate 440, the bottom housing is connected to the buckle plate 440, the auxiliary roller 411 is installed between the bottom housing and the buckle plate 440, and a part of the structure of the auxiliary roller 411 extends out of the bottom housing, and the first buckle 460 is slidably assembled on the bottom housing and a part of its structure extends out of the buckle plate 440 to connect with the housing 100. The first buckle 460 is connected to the housing 420 through a fourth elastic member 470.

[0087] Of course, the detachable device 400 may also adopt other structural forms.

[0088] like Figure 2 , Figure 3 and Fig. 9 One end of the cover body 600 is hinged to the housing 100, and the other end is connected to the housing 100 through a buckle structure. The housing 100 is provided with a cover opening button 110, and the cover opening button 110 is connected to the buckle structure for unlocking the buckle structure.

[0089] Specifically, the cover opening button 110 is connected with a snap plate, and the housing 100 is snap-connected with the cover body 600 through the snap plate. Specifically, the snap plate is connected with the cover opening button 110, and the snap plate is provided with a hook, and a slot corresponding to the hook is provided on the cover body 600. The cover opening button 110 is connected to the housing 100 through a third elastic member 111, and the third elastic member 111 is used to reset the cover opening button 110. When the cover body 600 is closed on the opening of the housing 100, the hook extends into the slot, so that the cover body 600 is connected to the housing 100. After pressing the cover opening button 110, the cover opening button 110 drives the snap plate to move toward the inside of the housing 100, so that the hook is disengaged from the slot, and the cover body 600 is unlocked. Furthermore, a cover opening button 110 limit block is provided in the housing 100, a cover opening button limit member 112 is connected to the housing 100 and is located inside the housing 100, and a third elastic member 111 is connected between the cover opening button limit member 112 and the cover opening button 110. Specifically, the cover opening button 110 and the clamping plate can be an integrated structure.

[0090] Further, the cover body 600 is provided with a steel shaft 601, and the steel shaft 601 is installed on the cover body 600 through a steel shaft stopper 602. Specifically, the return spring 603 is a torsion spring, and the return spring 603 is sleeved on the steel shaft 601, and is assembled on the cover body 600 by the limit function of the steel shaft stopper 602. The end of the torsion spring is connected to the housing 100, and the cover body 600 is hinged to the housing 100 through the steel shaft 601. When the cover body 600 is engaged with the clamping plate, the return spring 603 accumulates force. When the cover opening button 110 is pressed, the return spring 603 drives the cover body 600 to flip, thereby realizing the automatic flipping of the cover body 600.

[0091] In a feasible embodiment, the nozzle protection cover 500 is connected to the detachable device 400 by magnetic attraction. Specifically, a first magnetic member 480 is provided in the detachable device 400, and a second magnetic member 503 is provided in the nozzle protection cover 500. The first magnetic member 480 and the second magnetic member 503 are attracted to each other, so that the nozzle protection cover 500 is attracted to the detachable device 400.

[0092] Second embodiment

[0093] This embodiment is an improvement on the above-mentioned first embodiment, and the technical contents disclosed in the first embodiment are not described repeatedly, and the contents disclosed in the first embodiment also belong to the contents disclosed in this embodiment.

[0094] In this embodiment, the first cover opening detection device includes a first trigger member 505, a first detection switch 133 and a corresponding circuit. The first trigger member 505 is arranged on the nozzle protection cover 500. When the nozzle protection cover 500 is closed, the first trigger member 505 contacts the first detection switch 133 in the housing 100.

[0095] like Fig.13 The first detection switch 133 and the corresponding circuit are integrated in the main control board 131, and the first detection switch 133 is located at the bottom of the main control board 131 so as to be closer to the nozzle protection cover 500. The first trigger member 505 is disposed on the nozzle protection cover 500. Figure 7 In the embodiment, the first triggering member 505 is a column disposed on the nozzle protection cover 500, and the column and the nozzle protection cover 500 are an integral structure. When the nozzle protection cover 500 is covered on the housing 100, the first triggering member 505 contacts the first detection switch 133.

[0096] When the handheld printer is turned on, the nozzle protection cover 500 is removed, and the first trigger member 505 leaves the first detection switch 133, so that the first detection switch 133 is in a triggered state. When the printer is in a printing state, the early warning device does not alarm.

[0097] When the handheld printer is turned on, the nozzle protection cover 500 is removed, and the first trigger member 505 leaves the first detection switch 133, so that the first detection switch 133 is in a triggered state. The handheld printer automatically detects the current state through program control. When the handheld printer is in the working state (i.e., the printing state), it waits for the printing to be completed and then starts the nozzle protection cover 500 cover removal timing; when the handheld printer is in the non-working state (i.e., the standby state), it enters the nozzle protection cover 500 cover removal timing. When the set time (e.g., ten minutes) is reached, the early warning device warns, and the early warning device turns red. The early warning device can also pop up a prompt message through the application to cover the nozzle protection cover 500.

[0098] like Fig. 9 and Fig.13 As shown, in a preferred implementation manner of this embodiment, the second cover opening detection device includes a second trigger member 604, a second detection switch 134 and a corresponding circuit. The second trigger member 604 is arranged on the cover body 600. When the cover body 600 is closed, the second trigger member 604 contacts the second detection switch 134 of the casing 100.

[0099] like Fig.13 The second detection switch 134 and the corresponding circuit are integrated in the main control board 131, and the second detection switch 134 is located on the top of the main control board 131 so as to be closer to the cover 600. The second trigger 604 is disposed on the cover 600. Fig. 9 In the embodiment, the second trigger member 604 is a protruding structure disposed on one side edge of the cover body 600 , and the second trigger member 604 and the cover body 600 are an integral structure. When the cover body 600 is covered on the housing 100 , the second trigger member 604 contacts the second detection switch 134 .

[0100] When the handheld printer is in the power-on state, the cover 600 is opened, the second trigger 604 leaves the second detection switch 134, the second detection switch 134 is in the trigger state, the early warning device issues an alarm, the machine status indicator turns red, and the embedded control module performs power-off processing on the print driver module to prevent the user from opening the upper cover and pulling out the ink cartridge 300 in the power-on state, thereby causing damage to the ink cartridge 300 or a short circuit in the print driver module. Specifically, the early warning device can issue an early warning through the application software of the mobile terminal, for example, through the application software, a pop-up window is displayed on the mobile terminal to remind the user that the cover 600 is not closed.

[0101] When the handheld printer is in the printing state, if the second detection switch 134 is in the triggering state, the early warning device will give an alarm, the embedded control module will power off the printing drive module, and the current printing will be interrupted.

[0102] like Figure 7As shown, in a preferred implementation manner of the present embodiment, the nozzle protective cover 500 includes a protective cover outer shell 501 and a protective cover inner shell 502, a second magnetic component 503 is provided on the protective cover outer shell 501, the protective cover outer shell 501 is half-covered on the outer side of the protective cover inner shell 502, and the protective cover inner shell 502 faces the casing 100.

[0103] The second magnetic member 503 is located between the protective cover inner shell 502 and the protective cover outer shell 501 . Specifically, a limiting groove is provided in the protective cover outer shell, and the second magnetic member 503 is installed in the limiting groove, and the second magnetic member 503 abuts against the protective cover inner shell 502 .

[0104] A protective cover 504 is disposed on the protective cover inner shell 502 , and the protective cover 504 is opposite to the nozzle and is used to cover the nozzle. Specifically, the protective cover inner shell 502 is provided with a groove, and the protective cover 504 is embedded in the groove.

[0105] Furthermore, in an optional implementation, the first trigger member 505 may be disposed on the top surface of the protective cover inner shell 502 and extend upward.

[0106] Furthermore, in an optional implementation, a positioning column is provided on the protective cover inner shell 502 , and a positioning hole is provided on the protective cover outer shell 501 , and the positioning column of the protective cover inner shell 502 matches with the positioning hole of the protective cover outer shell 501 .

[0107] like Figure 7 As shown, in an optional embodiment, a claw is provided on the edge of the protective cover inner shell 502, and a slot is provided on the edge of the protective cover outer shell 501. When the protective cover inner shell 502 is installed to the protective cover outer shell 501, the claw extends into the slot, thereby fixing the protective cover inner shell 502 to the protective cover outer shell 501.

[0108] In an optional implementation, a scraper slot may also be provided in the inner shell 502 of the protective cover, and a nozzle scraper is clamped and placed in the scraper slot.

[0109] In a specific implementation of this embodiment, the handheld printer includes: a housing 100, an ink cartridge 300, an FPC device 200, a detachable device 400, a cover body 600 and a nozzle protection cover 500. Among them:

[0110] The housing 100 includes a screen printing plate 105, a printer housing 103 and a printer inner housing 104. The housing 100 is provided with a printing button 102, an FPC device 200, an ink cartridge 300, an electronic control module 130 and a battery 120. The screen printing plate 105 is used to print logos such as trademarks. The screen printing plate 105 is bonded to the printer housing 103 and the printer inner housing 104. The screen printing plate 105 is also provided with a WiFi indicator light-transmitting area 108, a working status indicator light-transmitting area 107, and a reset switch through hole 106. The printing button 102 matches the hole provided in the printer housing 103. The printer housing 103 is placed above the printer inner housing 104 and is screwed to the printer inner housing 104. The FPC device 200 is screwed to the printer inner housing 104 and is screwed to the electronic control module 130. The ink cartridge 300 is placed in the cavity provided in the printer inner shell; the electronic control module 130 includes a main control board 131 and a type-c board 132; the electronic control module 130 is screwed to the printer inner shell, and the main control board 131 is placed on the left side of the printer inner shell; the type-c board 132 is placed on the rear side of the printer inner shell; the printer inner shell 104 is connected with a bottom shielding sheet 109, and the inkjet port is provided on the bottom shielding sheet 109. In a preferred embodiment, the bottom shielding sheet 109 cooperates with the printer inner shell 104 through a positioning column. (Of course, the bottom shielding sheet 109 can also be connected to the printer inner shell 104 in other ways, such as bonding.) The battery 120 is placed on the right side of the printer inner shell 104, bonded to the printer inner shell 104, and electrically connected to the electronic control module 130.

[0111] like Figure 3 and Fig. 9 As shown, the top of the housing 100 has an opening, one end of the cover 600 is hinged to the housing 100, and the other end is connected to the housing 100 through a snap structure, and the housing 100 is provided with a cover opening button 110. The cover 600 is provided with a steel shaft 601, and the steel shaft 601 is installed on the cover 600 through a steel shaft limit block 602. The reset spring 603 is sleeved on the steel shaft 601, and is assembled to the cover 600 by the limiting effect of the steel shaft limit block 602. The reset spring 603 can be a torsion spring, and the end of the torsion spring is connected to the housing 100, and the cover 600 is hinged to the housing 100 through the steel shaft 601.

[0112] like Figure 6As shown, the FPC device 200 includes a flexible circuit board 210, a support plate 230, a flexible pad 220, a fixed plate 240 and a first elastic member 260. The flexible circuit board 210 is installed on the support plate 230, the flexible pad 220 is located between the support plate 230 and the flexible circuit board 210, the first elastic member 260 is located between the fixed plate 240 and the support plate 230, the fixed plate 240 is connected to the housing 100, and the support plate 230 can be close to or away from the fixed plate 240. The main roller 250 is connected to the fixed plate 240, and the main roller 250 is rotatably connected to the fixed plate 240 through a bearing 252. A groove is provided on the side of the main roller 250, and a magnet 254 is located in the groove. An annular groove is provided on the circumference of the main roller 250, and a rubber ring 253 is sleeved on the main roller 250, and a part of the structure of the rubber ring 253 is embedded in the annular groove.

[0113] In an optional solution, the housing 100 may also be provided with a hanging rope.

[0114] Furthermore, in the handheld printer provided in the present embodiment, the ink cartridge 300 is located inside the housing 100, and the size of the housing 100 is slightly larger than the size of the ink cartridge 300, that is, the size of the housing 100 is similar to the size of the ink cartridge 300, so that the overall size of the handheld printer is relatively small and more portable. Preferably, the outer contour of the handheld printer is similar to a rectangular parallelepiped with rounded corners, which is easy to grasp, so there is no need to set a handle or a handle protruding from the housing 100, so that the overall volume of the handheld printer is smaller and easier to carry, reducing the packaging cost and transportation cost. The user can directly grasp the outer side of the housing 100 to drive the handheld printer to move for printing operations. The appearance of the handheld printer provided in the present embodiment meets the requirements of various holding methods, and has a compact structure, light weight, and is easy to carry and easy to package and transport.

[0115] Furthermore, in order to facilitate gripping of the outer side of the housing 100 , an anti-skid structure may be provided on the outer side of the housing 100 . The anti-skid structure may be an anti-skid convex point, an anti-skid groove, an anti-skid convex rib, or the like.

[0116] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A handheld printer, characterized in that: include: Casing, ink cartridge, main roller, main control board and FPC device; The FPC device includes a flexible circuit board; The main control board and the flexible circuit board are both installed in the housing, the ink cartridge can be placed inside the housing, the flexible circuit board is electrically connected to the main control board, and the flexible circuit board can be electrically connected to the ink cartridge; The flexible circuit board is integrated with a print drive module, a position sensor module and an ink cartridge identification module; The main roller is rotatably connected to the housing, and the main roller is connected to a magnet, and the magnet is arranged opposite to the Hall element in the position sensor module; The FPC device further comprises a fixing plate, the flexible circuit board is connected to the housing via the fixing plate, the main roller is rotatably connected to the fixing plate, and the main roller is assembled to the housing via the fixing plate; The FPC device further comprises a support plate, a flexible pad and a first elastic member, the flexible circuit board is fixed to a side of the support plate away from the fixed plate, the flexible pad is spaced between the support plate and the flexible circuit board, the support plate can move relative to the fixed plate, the first elastic member is arranged between the fixed plate and the support plate, and the fixed plate is connected to the housing; It also includes a nozzle protection cover, a first cover opening detection device and an early warning device; The nozzle of the ink cartridge is opposite to the ink jet port of the housing, and the nozzle protection cover is used to cover the nozzle; the first cover-opening detection device is used to detect whether the nozzle protection cover is covering the nozzle; the main control board is respectively connected to the first cover-opening detection device and the early warning device, and when the nozzle protection cover is not covering the nozzle for more than a set time, the early warning device sends a warning signal; It also includes a cover body, a second cover-opening detection device and an early warning device. The housing has an opening, and the opening is used for the ink cartridge to be inserted into the interior of the housing. The cover body is used to cover the opening. The second cover-opening detection device is used to detect whether the cover body covers the ink cartridge. The main control board is controlled and connected to the second cover-opening detection device. When the cover body does not cover the ink cartridge, the main control board blocks the ink cartridge from printing, and the early warning device sends a early warning signal.

2. The handheld printer according to claim 1, characterized in that: The second cover opening detection device includes a second detection switch and a second trigger member, the second trigger member is arranged on the cover body, and the second detection switch is arranged on the main control board.

3. The handheld printer according to claim 1, characterized in that: It also includes a detachable device, the first side of the casing is provided with a protrusion, the protrusion is provided with an inkjet port, the nozzle of the ink cartridge is arranged opposite to the inkjet port, the main roller is arranged on the protrusion, the detachable device is provided with an auxiliary roller, and the detachable device is detachably connected to the first side of the casing.

4. The handheld printer according to claim 1, characterized in that: The main control board is integrated with a reset module, the housing is provided with a reset switch, the reset switch is connected to the reset module, and the reset module is used to restart the main control board.

5. The handheld printer according to claim 1, characterized in that: The main control board is also integrated with a communication module, and the communication module is used for data transmission with the terminal device.

6. The handheld printer according to claim 1, characterized in that: One end of the cover body is hinged to the housing, and the other end is connected to the housing through a buckle structure. The housing is provided with a cover opening button, and the cover opening button is connected to the buckle structure for unlocking the buckle structure.

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