Portable local printing equipment and system thereof

Abstract

The invention relates to the technical field of printing equipment, and discloses portable local printing equipment and a system thereof.The portable local printing equipment comprises printing equipment designed based on the thermal paper technology, the printing equipment comprises a shell and a cover plate installed on one side of the shell, and a damping penetrating rod rotationally connected is installed in the shell and used for sleeving thermal-sensitive roll paper; a plurality of guide rollers which are rotationally connected are mounted in the shell; according to the technical scheme of the thermo-sensitive paper, the thermo-sensitive paper is driven to move, the thermo-sensitive printing head is used for printing fonts on the thermo-sensitive paper, and then the thermo-sensitive paper is pasted on the paper, so that paper waste caused by reprinting of the whole paper is avoided, meanwhile, the requirements for note taking and content modification in electronic office are met, and the working efficiency is improved. Reprinting caused by local errors is reduced, and paper is saved; audio input, voice recognition, word processing and printing functions are integrated, operation is easy and convenient, the intelligent degree is high, instructions of a user can be quickly responded, and efficient office work is achieved.

Description

Technical Field

[0001] The present invention relates to the technical field of printing equipment, in particular to a portable local printing equipment and a system thereof. Background Art

[0002] With the development of office automation and convenience, traditional printing equipment and content modification tools have gradually exposed many shortcomings. Most existing printing devices print the entire sheet and lack the ability to print and modify partial content on the paper. This not only wastes paper, but also fails to meet the needs of note-taking and real-time content modification in electronic office. In addition, traditional printers are large in size, inconvenient to carry, and difficult to adapt to mobile office scenarios.

[0003] On the other hand, existing content modification tools such as correction tape can modify partial content, but the font and format of the modified handwritten content are quite different from the original printed content, which is difficult to meet the needs of formal occasions. At the same time, correction tape cannot be integrated with electronic office equipment and cannot realize digital processing of content.

[0004] Based on the above-mentioned deficiencies of the prior art, the present invention aims to develop a portable local printing and modification device, which solves the defects of the existing devices in local printing and content modification by combining voice input or preset content input, text processing and local printing technology, while improving office efficiency and convenience. Summary of the invention

[0005] In view of the deficiencies of the prior art, the present invention provides a portable local printing device and a system thereof to solve the background technical problems.

[0006] The first aspect: To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a portable local printing device, including a printing device designed based on thermal paper technology, the printing device including a shell and a cover plate installed on one side of the shell, a rotatably connected damping rod is installed in the shell, the damping rod is used to sleeve the thermal paper roll, a plurality of rotatably connected guide rollers are installed in the shell, one end of the shell is an open structure, and an output guide roller is rotatably connected in the opening, one end of the thermal paper roll slides with the output guide roller and the guide roller, a driving unit is installed in the shell, the driving unit includes a motor, a squeezing roller and an auxiliary roller installed in the shell, the motor drives the squeezing roller to rotate and cooperate with the auxiliary roller to clamp the backing paper of the thermal paper and drive it to move, a discharge port is opened in the side wall of the shell, a thermal print head for printing fonts on the thermal paper is installed on the side wall of the shell, and a stable cutting unit for laminating and cutting the thermal paper is installed on the outer wall of one end of the shell.

[0007] Preferably, the drive unit also includes a worm wheel installed in the outer shell, a fixed sleeve and a worm installed at the output end of the motor, the worm wheel is rotatably connected in the outer shell, the motor is transversely installed in the outer shell, one end of the extrusion roller is fixedly connected to one end of the worm wheel, one end of the worm is rotatably connected in the fixed sleeve, and the worm and the worm wheel are meshed with each other.

[0008] Preferably, the driving unit also includes two adjusting rods fixedly mounted on the inner side wall of the shell, the outer wall of the adjusting rod is slidably connected to the support frame, the outer wall of the adjusting rod is sleeved with a first spring for applying an external thrust to the support frame, and the auxiliary roller is rotatably connected in the support frame.

[0009] Preferably, the stable cutting unit includes two limit rods fixedly mounted on the outer wall of the shell, a stabilizing frame is slidably connected to the limit rods, a pressing roller for pressing the thermal paper is rotatably connected to the lower end of the stabilizing frame, and a second spring for applying thrust to the stabilizing frame is sleeved on the limit rods.

[0010] Preferably, the stable cutting unit further comprises a limiting slide groove provided on the side wall of the stable frame, a push block is slidably connected in the limiting slide groove, one end of the push block is fixedly connected to a cutter, and the cutter has a diamond-shaped structure.

[0011] Preferably, the outer wall of the shell is provided with a plurality of stable rotating holes, and the plurality of stable rotating holes are respectively sleeved on one end of the damping rod, the output guide roller, the squeezing roller and the plurality of guide rollers.

[0012] A second aspect: A portable local printing system, comprising the portable local printing device described in the first aspect, and a control module connected to the printing device in communication; the control module comprises:

[0013] A voice input unit, used to receive a user's voice command;

[0014] a speech-to-text unit configured to convert the voice command into text information;

[0015] A word processing unit for formatting and typesetting text information;

[0016] The printing control unit drives the thermal print head to perform partial printing according to the typeset text information, and controls the start and stop time of the motor.

[0017] The Bluetooth communication unit is used to establish a wireless connection with an external mobile device and receive a printing instruction or text data input by a user through the mobile device.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] The present invention adopts a thermal paper technical solution, uses a driver to move the thermal paper, uses a thermal print head to print fonts on the thermal paper, and then sticks the thermal paper on the paper, thereby avoiding paper waste caused by reprinting the entire sheet, while meeting the needs of note-taking and content modification in electronic office, reducing reprinting due to local errors, and saving paper; audio input, voice recognition, word processing and printing functions are integrated into one, the operation is simple and convenient, the degree of intelligence is high, and the user's instructions can be quickly responded to to achieve efficient office.

[0020] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the housing of the present invention;

[0023] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0024] Figure 4 is a detailed structural schematic diagram of the drive unit of the present invention;

[0025] Figure 5 It is a detailed structural schematic diagram of the stable cutting unit of the present invention;

[0026] Figure 6 It is a flowchart of the portable local printing system of the present invention.

[0027] In the figure: 1. shell; 2. cover plate; 3. damping rod; 4. output guide roller; 5. thermal print head; 6. drive unit; 61. extrusion roller; 62. auxiliary roller; 63. motor; 64. worm; 65. fixing sleeve; 66. worm gear; 67. adjustment rod; 68. first spring; 69. support frame; 7. guide roller; 8. stable cutting unit; 81. limit rod; 82. stable frame; 83. second spring; 84. pressing roller; 85. push block; 86. cutter; 87. limit slide groove; 9. outlet; 10. stable rotating hole. DETAILED DESCRIPTION

[0028] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this technical field without creative work are within the scope of protection of the present invention.

[0029] Embodiment 1:

[0030] See also Figure 1-5 The present embodiment provides a portable local printing device, which is a printing device designed based on thermal paper technology. The printing device includes a shell 1 and a cover plate 2 installed on one side of the shell 1. A rotatably connected damping rod 3 is installed in the shell 1. The damping rod 3 is used to cover the thermal paper roll, which has a certain damping. When the thermal paper roll is pulled, the damping rod 3 will not loosen. A plurality of rotatably connected guide rollers 7 are installed in the shell 1. One end of the shell 1 is an open structure, and an output guide roller 4 is rotatably connected in the opening. One end of the thermal paper roll slides with the output guide roller 4 and the guide roller 7. A driving unit 6 is installed in the shell 1. The driving unit 6 includes a motor 63, a squeezing roller 61 and an auxiliary roller 62 installed in the shell 1. The motor 63 drives the squeezing roller 61 to rotate and cooperate with the auxiliary roller 62 to clamp the backing paper of the thermal paper and drive it to move, so as to pull the thermal paper roll. The thermal sensitive of the thermal paper roll When the paper part is outside the output guide roller 4, it is separated from the backing paper. The side wall of the housing 1 is equipped with a thermal print head 5. The thermal paper contacts the thermal print head 5 during the movement. The thermal print head 5 prints fonts on the thermal paper. The cover plate 2 is detachable, which is convenient for replacing the thermal roll paper. The motor 63 is started to work, so that the drive unit 6 drives the backing paper of the thermal roll paper to move. The side wall of the housing 1 is provided with a discharge port 9, and the backing paper is discharged from the discharge port 9. A corner of the thermal paper is pasted on the place where the font needs to be printed. The backing paper moves and separates from the thermal paper. The housing 1 is moved, and the thermal print head 5 prints fonts on the thermal paper. The thermal paper with the font printed is pasted on the place where the font needs to be printed, realizing the local printing and modification capabilities, avoiding the waste of paper caused by reprinting the whole sheet, and meeting the needs of note-taking and content modification in electronic office. The device is compact and easy to carry, suitable for mobile office scenes. Users can perform local printing and content modification at any location, which improves office efficiency and flexibility.

[0031] The driving unit 6 also includes a worm gear 66, a fixed sleeve 65 and a worm 64 installed at the output end of the motor 63 installed in the housing 1. The worm gear 66 is rotatably connected in the housing 1, and the motor 63 is horizontally installed in the housing 1. One end of the squeezing roller 61 is fixedly connected to one end of the worm gear 66, and one end of the worm gear 64 is rotatably connected in the fixed sleeve 65. The worm gear 64 and the worm gear 66 are meshed with each other. The motor 63 drives the worm gear 64, which in turn drives the worm gear 66 to rotate, so that the squeezing roller 61 cooperates with the auxiliary roller 62 to drive the backing paper of the thermal paper roll to move. The motor 63 is located horizontally in the housing 1, and the squeezing roller 61 is driven to rotate by the worm gear 64 and the worm gear 66, which occupies a lateral area, reduces the overall width, and improves the convenience of use.

[0032] The driving unit 6 also includes two adjusting rods 67 fixedly mounted on the inner side wall of the shell 1. The outer wall of the adjusting rod 67 is slidably connected to a support frame 69. The outer wall of the adjusting rod 67 is sleeved with a first spring 68 for applying an external thrust to the support frame 69. The auxiliary roller 62 is rotatably connected in the support frame 69. By utilizing the thrust of the first spring 68 and cooperating with the support frame 69, the auxiliary roller 62 and the squeezing roller 61 clamp the backing paper of the thermal paper roll. When the thermal paper roll needs to be replaced, the support frame 69 is pressed to separate the auxiliary roller 62 from the squeezing roller 61. At this time, it is convenient to put the backing paper between the auxiliary roller 62 and the squeezing roller 61 for easy replacement.

[0033] A stable cutting unit 8 is installed on the outer wall of one end of the shell 1. The stable cutting unit 8 includes two limit rods 81 fixedly installed on the outer wall of the shell 1. A stable frame 82 is slidably connected to the limit rod 81. The lower end of the stable frame 82 is rotatably connected to a pressing roller 84. A second spring 83 for applying a thrust to the stable frame 82 is sleeved on the limit rod 81. The downward pressure applied by the second spring 83 to the stable frame 82 is used to make the pressing roller 84 always keep the thermal paper separated from the backing paper close to the surface of the target paper to ensure that the printed content is firmly attached. As the shell 1 moves, the pressing roller 84 stably and closely attaches the thermal paper printed with fonts, thereby improving practicality.

[0034] The stable cutting unit 8 also includes a limiting slide groove 87 opened on the side wall of the stable frame 82, and a push block 85 is slidably connected in the limiting slide groove 87. One end of the push block 85 is fixedly connected to a cutter 86. The cutter 86 has a diamond-shaped structure, and its lateral width is greater than its height. The movable range of the cutter 86 is greater than the width of the thermal paper. Therefore, after the thermal paper is attached to a position such as a paper, if the thermal paper needs to be cut, it only needs to push the block 85 to make the cutter 86 cut the thermal paper horizontally, which is convenient for operation and use.

[0035] The outer wall of the housing 1 is provided with a plurality of stabilizing rotating holes 10, which are respectively sleeved on one end of the damping rod 3, the output guide roller 4, the squeezing roller 61 and the plurality of guide rollers 7 to improve stability.

[0036] Embodiment 2:

[0037] See also Figure 1-6 Based on the first embodiment, this embodiment provides a portable local printing system, including the portable local printing device described in the first embodiment, and a control module connected to the portable local printing device, and the control module is specifically as follows:

[0038] (1) User input module

[0039] Voice input unit:

[0040] The hardware design features a built-in high-sensitivity MEMS microphone (model: Knowles SPH0645), which supports a signal-to-noise ratio of ≥65dB, a directional pickup angle of 120°, and can effectively capture voice commands within 3 meters.

[0041] The software integrates a speech recognition system based on a deep learning model, using Baidu Smart Cloud speech recognition API (supports offline mode) to achieve mixed recognition of Chinese and English, with a recognition accuracy rate of ≥ 97%. Users can trigger printing tasks through voice commands (such as "print today's to-do list").

[0042] Bluetooth communication unit:

[0043] It uses Nordic nRF52840 low-power Bluetooth (BLE) module, supports BLE 5.2 protocol, and has a maximum transmission rate of 2Mbps. After pairing with a mobile device (phone / tablet), users can perform the following operations through the exclusive WeChat applet "LocalPrint" or Android / iOS application:

[0044] Voice input;

[0045] Import pre-edited documents (Word / TXT / PDF format);

[0046] Edit text in real time (support font, font size, adjustment);

[0047] Select the printing mode (partial printing / roll paper transfer);

[0048] Send a print command to the device.

[0049] (2) Control processing module

[0050] Speech-to-text unit:

[0051] Based on the customized optimization of the open source speech recognition framework Kaldi, a lightweight model (model size <50MB) is deployed locally, supporting real-time conversion with a delay of <0.5 seconds. After the audio signal is pre-processed (noise reduction, framing, MFCC feature extraction), the text is output to the text processing unit.

[0052] Word processing unit:

[0053] Font: Support Songti, Heiti and Kaiti;

[0054] Font size: 8-24pt, step 1pt;

[0055] Alignment: left, center, right;

[0056] Special symbols: insertion arrow, checkbox, underline.

[0057] Mobile editing: The editing interface is displayed through a mini-program or App, supporting multi-language typesetting (such as Chinese and English mixed) and column typesetting.

[0058] Print control unit:

[0059] Using the STM32F407 microcontroller, the following components are precisely controlled through PWM signals:

[0060] Thermal print head 5: Set the heating temperature to 80-120℃ (error ±2℃), heating time to 0.1-0.5ms, to ensure that the local printing is clear and does not burn through the thermal paper;

[0061] Motor 63: drives the thermal paper to move step by step (step length 0.5mm), and cooperates with the thermal print head 5 to achieve partial printing;

[0062] (3) Print output module

[0063] Partial printing mode:

[0064] The user slides the handheld device on the target paper, and the thermal print head 5 heats in real time according to the layout content to generate text on the thermal paper. A weak adhesive layer (similar to correction stickers) is pre-coated on the back of the thermal paper, which can be directly pasted to the target position after printing to achieve seamless modification.

[0065] (4) System workflow

[0066] Command input:

[0067] Users use the voice command "print meeting minutes" or the mini-program to select a template;

[0068] The speech signal is transmitted to the Kaldi model after noise reduction, and the output text is "Minutes of the October 2023 Meeting".

[0069] Text processing:

[0070] The word processing unit automatically matches the preset template (bold titles, bullet points);

[0071] The user adjusts the font size to 12pt and the alignment to center in the mini program.

[0072] Print execution:

[0073] The printing control unit drives the motor 63 to step the thermal paper, and the thermal print head 5 prints the content in a designated area on the thermal paper. The printed thermal paper is separated from the backing paper and attached to the paper that needs to be corrected or added.

[0074] This embodiment discloses a portable partial printing device and its system, which combines mechanical structure with intelligent control module to realize efficient partial printing and correction, avoiding paper waste caused by reprinting the whole sheet, meeting the needs of note-taking and content modification in electronic office, reducing reprinting due to partial errors, and saving paper; the device is small in size, easy to carry, and suitable for mobile office scenarios. Users can perform partial printing and content modification at any location, improving office efficiency and flexibility; audio input, voice recognition, text processing and printing functions are integrated into one, which is simple and convenient to operate, highly intelligent, and can quickly respond to user instructions to achieve efficient office; through voice-to-text and text processing technology, the present invention realizes digital processing of content, ensuring that the modified text is consistent with the original printed content in font and format, meeting the needs of formal occasions.

Claims

1. A portable local printing device, including a printing device designed based on thermal paper technology, characterized in that: The printing device comprises a housing (1) and a cover plate (2) installed on one side of the housing (1); a rotatably connected damping rod (3) is installed in the housing (1); the damping rod (3) is used to cover a thermal paper roll; a plurality of rotatably connected guide rollers (7) are installed in the housing (1); one end of the housing (1) is an open structure, and an output guide roller (4) is rotatably connected in the opening; one end of the thermal paper roll slides with the output guide roller (4) and the guide roller (7); a driving unit (6) is installed in the housing (1); The driving unit (6) comprises a motor (63), a squeezing roller (61) and an auxiliary roller (62) installed in the housing (1); the motor (63) drives the squeezing roller (61) to rotate and cooperate with the auxiliary roller (62) to clamp the backing paper of the thermal paper and drive it to move; a discharge port (9) is provided on the side wall of the housing 1; a thermal print head (5) for printing characters on the thermal paper is installed on the side wall of the housing (1); and a stable cutting unit (8) for laminating and cutting the thermal paper is installed on the outer wall of one end of the housing (1).

2. A portable local printing device according to claim 1, characterized in that: The driving unit (6) further comprises a worm wheel (66) installed in the housing (1), a fixed sleeve (65) and a worm (64) installed at the output end of the motor (63); the worm wheel (66) is rotatably connected in the housing (1); the motor (63) is transversely installed in the housing (1); one end of the squeezing roller (61) is fixedly connected to one end of the worm wheel (66); one end of the worm (64) is rotatably connected in the fixed sleeve (65); and the worm (64) and the worm wheel (66) are meshed with each other.

3. A portable local printing device according to claim 1, characterized in that: The driving unit (6) further comprises two adjusting rods (67) fixedly mounted on the inner side wall of the housing (1); the outer wall of the adjusting rod (67) is slidably connected to a support frame (69); the outer wall of the adjusting rod (67) is sleeved with a first spring (68) for applying an external thrust to the support frame (69); and the auxiliary roller (62) is rotatably connected inside the support frame (69).

4. A portable local printing device according to claim 1, characterized in that: The stable cutting unit (8) comprises two limit rods (81) fixedly mounted on the outer wall of the housing (1); a stable frame (82) is slidably connected to the limit rods (81); a pressing roller (84) for pressing the thermal paper is rotatably connected to the lower end of the stable frame (82); and a second spring (83) for applying a thrust to the stable frame (82) is sleeved on the limit rods (81).

5. A portable local printing device according to claim 4, characterized in that: The stable cutting unit (8) further comprises a limiting slide groove (87) provided on the side wall of the stable frame (82), a push block (85) being slidably connected in the limiting slide groove (87), a cutter (86) being fixedly connected to one end of the push block (85), and the cutter (86) being of a diamond-shaped structure.

6. A portable local printing device according to claim 2, characterized in that: The outer wall of the housing (1) is provided with a plurality of stabilizing rotating holes (10), and the plurality of stabilizing rotating holes (10) are respectively sleeved on one end of the damping rod (3), the output guide roller (4), the squeezing roller (61) and the plurality of guide rollers (7).

7. A portable local printing system, characterized in that: The portable local printing device comprises any one of claims 1 to 6, and a control module connected to the printing device in communication; the control module comprises: A voice input unit, used to receive a user's voice command; a speech-to-text unit configured to convert the voice command into text information; A word processing unit for formatting and typesetting text information; A printing control unit drives the thermal printing head (5) to perform partial printing according to the typeset text information, and controls the start and stop time of the motor (63). The Bluetooth communication unit is used to establish a wireless connection with an external mobile device and receive a printing instruction or text data input by a user through the mobile device.

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