An easy-to-maintain handheld printer and labeler

Abstract

This utility model relates to an easy-to-maintain handheld label printer, comprising a main frame, a lower support, a printer core, a backing paper recycling mechanism, a label roll mounting mechanism, a peeling rod, a rubber roller, and a control mechanism. The printer core, backing paper recycling mechanism, and label roll mounting mechanism are arranged sequentially from front to back and are all mounted on the main frame. The peeling rod and rubber roller are mounted on the lower support, which is located below the main frame and detachably connected to it. The peeling rod is located in front of the printer core, and the rubber roller is located directly below the printer core. The control mechanism is fixed inside the main frame and is powered by a power supply. The control mechanism is connected to both the backing paper recycling mechanism and the printer core. The advantages of this utility model are: convenient label roll mounting, accurate label positioning, high label information printing precision, compact and portable design, and wide applicability.

Description

Technical Field

[0001] This utility model relates to the field of labeling machines, and in particular to an easy-to-maintain handheld printing and labeling machine. Background Technology

[0002] Existing express label printers only have label printing functions. After the label is printed, it must be manually removed, the backing paper peeled off, and then the label pasted onto the package. This can only meet the needs of sporadic printing and labeling applications such as door-to-door pickup. For applications such as express stations and warehousing and logistics centers, which need to quickly complete the printing and labeling of a large number of items, manually tearing off the printed labels and pasting them onto the packages obviously seriously affects work efficiency. Therefore, for scenarios involving labeling a large number of items, there is an urgent need for an integrated printer and labeler that can automatically complete the labeling after printing.

[0003] Existing integrated printers with backing paper recycling functions have the following problems: 1. When installing the label roll, positioning the label paper's path and fixing the starting end of the backing paper are difficult, time-consuming, and inconvenient; 2. They cannot fix mobile terminals, such as mobile phones and PDAs; 3. The printing position on the label has a large deviation; 4. The label peeling success rate is low, and problems such as labels not being peeled off are not detected in time. Summary of the Invention

[0004] To address the aforementioned issues, the present invention aims to provide an easy-to-maintain handheld printing and labeling machine, which fixes the component that provides lower support along the label paper's travel path onto a lower bracket. The lower bracket is rotatably connected to the main frame, thereby making label installation faster.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An easy-to-maintain handheld printing and labeling machine includes a main frame, a lower support, a printer core, a backing paper recycling mechanism, a label roll mounting mechanism, a peeling rod, a rubber roller, and a control mechanism. The printer core, backing paper recycling mechanism, and label roll mounting mechanism are arranged sequentially from front to back and are all mounted on the main frame. The peeling rod and rubber roller are mounted on the lower support. The lower support is located below the main frame and is detachably connected to the main frame. The peeling rod is located in front of the printer core, and the rubber roller is located directly below the printer core. The control mechanism is fixed inside the main frame and is powered by a power source. The control mechanism is connected to both the backing paper recycling mechanism and the printer core.

[0007] More preferably, the printing and labeling machine further includes a first sensor for detecting whether the label has been successfully peeled off. The first sensor is fixed on the main frame and located in front of the peeling rod. The first sensor is electrically connected to the control mechanism.

[0008] More preferably, the printing and labeling machine further includes a second sensor for detecting label gaps, the second sensor being fixed to the main frame and located behind the printing core, and the second sensor being electrically connected to the control mechanism.

[0009] More preferably, a synchronizing gear is provided at the end of the rubber roller, and the synchronizing gear meshes with the printing roller gear of the printer core.

[0010] More preferably, the printing and labeling machine further includes an auxiliary labeling mechanism, which includes a flattening assembly and a label pressure roller. The label pressure roller and the flattening assembly are arranged sequentially from front to back, and the flattening mechanism is located in front of the peeling rod. The flattening assembly includes multiple parallel mounting rods and multiple guide wheels. The two ends of each mounting rod are fixed to the lower support, and multiple guide wheels are provided on each mounting rod. The label pressure roller is fixed to the main frame.

[0011] More preferably, the lower bracket has a front connecting rod on its front side and a U-shaped spring and a rear connecting rod on its rear side. The bottom of the U-shaped spring is fixed to the rear side of the lower bracket, and the two ends of the U-shaped spring abut against the rear connecting rod. The two ends of the rear connecting rod are located in the limiting grooves on the two side plates of the lower bracket. The main bracket has a slot for accommodating the rear connecting rod, and the opening of the slot faces the rear connecting rod.

[0012] More preferably, the backing paper recycling mechanism includes a horizontally arranged backing paper mounting rod, a backing paper locking rod, and a servo motor for driving the backing paper mounting rod to rotate. One end of the backing paper mounting rod is fixed to the main frame. The backing paper mounting rod is provided with a locking groove along the axial direction for matching the shape of the backing paper locking rod. The backing paper locking rod is inserted into the locking groove. The servo motor is electrically connected to the control mechanism. The label roll mounting mechanism includes a label roll mounting rod and a limiting member for positioning the label roll. The limiting member is disposed on the label roll mounting rod.

[0013] More preferably, the limiting member is a chuck, and the chuck has a through hole in the middle for passing through the label roll mounting rod. The inner wall of the through hole is provided with a spring-loaded tab, one side of which is fixedly connected to the inner wall of the through hole, and the other side abuts against the side wall of the label roll mounting rod.

[0014] More preferably, the upper surface of the main frame is provided with a telescopic bracket for fixing the mobile terminal device; a handle is also fixed on the main frame, and the handle is detachably connected to the main frame or integrally formed.

[0015] More preferably, the print head is a print head with a built-in stepper motor, the control mechanism transmits printing data with the print head, and the control mechanism controls the number of forward or backward rotation steps of the stepper motor; the control mechanism is equipped with a wireless communication module, and the control mechanism also transmits data with a mobile terminal through the wireless communication module, and the control mechanism transmits the received data to the print head.

[0016] This utility model has the following beneficial effects:

[0017] 1. Easy label roll installation: The lower bracket, which can be detachably connected to the main unit frame, makes label roll installation faster.

[0018] 2. Accurate label positioning: The label position and status are accurately located by the first and second sensors, resulting in high accuracy in label information printing.

[0019] 3. High adaptability: Supports a variety of label materials and sizes, and can adapt to different industries and application scenarios.

[0020] 4. High portability: The handheld design and compact size make the device easy to carry to various workplaces, meeting the needs of mobile printing and labeling.

[0021] 5. Easy to operate: It can be operated and controlled through a mobile terminal, requiring no professional computer knowledge, and ordinary users can easily get started.

[0022] 6. High efficiency and practicality: The integrated printing and labeling design reduces operation steps and time costs, while the telescopic card holder further improves the practicality of the equipment. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0024] Figure 2 This is a schematic diagram of the internal structure of this utility model (with the outer side panels of the main frame removed);

[0025] Figure 3 This is a schematic diagram of the lower support of this utility model;

[0026] Figure 4 This is a schematic diagram of the internal structure of Embodiment 2 of the present invention;

[0027] Figure 5 This is a schematic diagram of the lower support and the main frame of this utility model being completely separated and connected.

[0028] Explanation of reference numerals in the attached figures:

[0029] 1. First sensor; 2. Second sensor; 3. Printer cartridge; 4. Peeling rod; 5. Glue roller; 6. Control mechanism; 7. Handle; 8. Steering limit shaft; 9. Label outlet;

[0030] 10. Main frame; 11. Card slot; 12. Arc-shaped groove; 13. Strip hole;

[0031] 20. Lower bracket; 21. Front connecting rod; 22. U-shaped spring; 23. Rear connecting rod; 24. Limiting groove;

[0032] 30. Label roll mounting mechanism; 31. Label roll mounting rod; 32. Limiting component; 321. Elastic lever;

[0033] 40. Bottom paper recycling mechanism; 41. Bottom paper mounting rod; 411. Locking slot; 42. Servo motor;

[0034] 50. Telescopic bracket; 51. Fixed bracket; 52. Movable bracket; 53. Telescopic elastic element; 531. Screw;

[0035] 60. Auxiliary labeling mechanism; 61. Label pressure roller; 62. Guide wheel mounting rod; 63. Guide wheel. Detailed Implementation

[0036] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments:

[0037] See Figures 1 to 3A handheld label printer / printer that is easy to maintain includes a main frame 10, a lower support 20, a printer core 3, a backing paper recycling mechanism 40, a label roll mounting mechanism 30, a peeling rod 4, a glue roller 5, and a control mechanism 6. The printer core 3, the backing paper recycling mechanism 40, and the label roll mounting mechanism 30 are arranged sequentially from front to back and are all mounted on the main frame 10. The peeling rod 4 and the glue roller 5 are mounted on the lower support 20. The lower support 20 is located below the main frame 10 and is detachably connected to it. The peeling rod 4 is located in front of the printer core 3, and the glue roller 5 is located directly below the printer core 3. The control mechanism 6 is fixed inside the main frame 10. The control mechanism 6 is powered by a power source (not shown), which can be an external power source or a battery. The control mechanism 6 is connected to the backing paper recycling mechanism 40 and the printer core 3. The control mechanism 6 is a control circuit board, which mainly includes a main control chip, a memory, and a wireless communication module. Preferably, the wireless communication module can be a Bluetooth module, or a main control chip with Bluetooth functionality, such as an ESP32 main control chip, can be directly selected. The control mechanism 6 also transmits data with a mobile terminal (not shown) via the wireless communication module, and the control mechanism 6 transmits the data received from the mobile terminal to the printing core 3.

[0038] When installing the label roll (which is made by rolling and winding label paper, which consists of a label backing paper and a label pasted on the label backing paper), after fixing the label roll to the label roll installation mechanism 30, the starting end of the label paper (usually only the backing paper, not the label) needs to pass through the gap between the printer core 3 and the rubber roller 5, then turn around 360° around the peeling bar 4, and then pass under the rubber roller 5 before fixing the starting end to the backing paper recycling mechanism 40. Because the label paper is rolled up and the gap is narrow, the installation is difficult, time-consuming and labor-intensive. Therefore, in this embodiment, the peeling bar 4 and the rubber roller 5 are installed on the lower bracket 20. The lower bracket 20 can be separated from the main frame 10, so that the label paper does not have to pass through narrow gaps, turn around, etc., making the installation more convenient, greatly reducing the difficulty of installing the label roll and shortening the installation time.

[0039] There are several ways to detachably connect the lower bracket 20 and the main frame 10. In this embodiment, the lower bracket 20 is mainly rotatably connected to the main frame 10 on one side and detachably connected to the main frame 10 on the other side. When it is necessary to install the label roll, the detachable side of the lower bracket 20 can be opened. Preferably, the lower bracket 20 has a front connecting rod 21 on the front side and a U-shaped spring piece 22 and a rear connecting rod 23 on the rear side. The bottom of the U-shaped spring piece 22 is fixed to the rear side of the lower bracket 20, and the two ends of the U-shaped spring piece 22 abut against the rear connecting rod 23. The two ends of the rear connecting rod 23 are set in the limiting grooves 24 on the two side plates of the lower bracket 20. The main frame 10 has a slot 11 for accommodating the rear connecting rod 23, and the opening of the slot 11 faces the rear connecting rod 23. When the lower bracket 20 and the main frame 10 are in a closed connection state, simply push the rear connecting rod 23 forward to press the U-shaped spring piece 22, causing the rear connecting rod 23 to slide out from the opening to open the lower bracket 20. The operation is simple. A completely separable connection between the lower bracket 20 and the main frame 10 can be achieved by replacing the rotatable connection between the front connecting rod 21 on the front side of the lower bracket 20 and the main frame 10 with a detachable connection, such as... Figure 5 As shown, an arc-shaped groove 12 with an opening is provided on the front side of the main frame 10, and the length of the arc-shaped groove 12 is greater than the depth of the slot 11. The two ends of the front connecting rod 21 are first pushed into the arc-shaped groove 12 and pushed to the bottom of the groove, and then the two ends of the rear connecting rod 23 are pushed into the slot 11. When it is necessary to open the lower bracket 20, the operation is reversed, and the front connecting rod 21 can slide out of the arc-shaped groove 12, thereby achieving complete separation of the lower bracket 20 from the main frame 10. The possible implementation methods of the lower bracket 20 and the main frame 10 are not limited to the two methods of this embodiment; all existing technologies that can achieve detachable connection methods are within the protection scope of this utility model.

[0040] The mobile terminals include mobile phones and PDAs. To enable the printing and labeling machine to fix mobile terminals and accommodate mobile terminals of different sizes, the upper surface of the main frame 10 of this embodiment of the printing and labeling machine is provided with a telescopic bracket 50 for fixing the mobile terminal device. The telescopic bracket 50 includes a fixed bracket 51, a movable bracket 52, and at least two telescopic elastic members 53. The fixed bracket 51 is fixed to the upper surface of the main frame 10, the movable bracket 52 is located on the side of the main frame 10 and is opposite to the fixed bracket 51, and one end of the telescopic elastic member 53 is fixed to the main frame 10, and the other end is fixedly connected to the movable bracket 52. The telescopic elastic member 53 may consist of a screw 531 and a spring (not shown) mounted on the screw 531. The diameter of the spring is larger than the diameter of the screw body 531 and smaller than the diameter of the screw head 531. A horizontal hole 13 is provided on the main frame 10. The diameter of the hole 13 near the movable latch 52 matches the diameter of the screw 531, and the diameter of the hole 13 away from the movable latch 52 matches the diameter of the screw head of the screw 531. The screw 531 passes through the hole 13, and its threaded end protrudes from the hole 13 and is threadedly connected to the movable latch 52. The length of the screw 531 is less than the length of the hole 13. The spring fitted on the screw 531 cannot pass through the hole 13 near the movable latch 52. When the movable latch 52 is pulled, the spring is compressed, and the spring's restoring force is tension, pushing the screw 531 towards the fixed latch 51, thereby pulling the movable latch 52 towards the fixed latch 51, thus fixing the mobile terminal.

[0041] The printer core 3 is a thermal printhead with a built-in stepper motor, such as the JX series printer core 3. The stepper motor inside the printer core 3 drives the print roller to rotate. The control mechanism 6 transmits printing data to the printer core 3 and controls the number of steps the stepper motor rotates forward or backward.

[0042] The peeling rod 4 is a triangular peeling rod, which can improve the success rate of label peeling.

[0043] One of the functions of the rubber roller 5 is to press the label paper against the printing roller of the printer core 3. At the same time, in order to push the label paper forward, a synchronous gear is provided at the end of the rubber roller 5. The synchronous gear meshes with the printing roller gear of the printer core 3, so that the label moves forward more smoothly.

[0044] To ensure that the label peeled off by the peeling rod 4 can continue to move smoothly forward to the label outlet without curling, this embodiment of the printing and labeling machine also includes an auxiliary labeling mechanism 60. The auxiliary labeling mechanism 60 includes a flattening assembly and a label pressure roller 61. The label pressure roller 61 and the flattening assembly are arranged sequentially from front to back, with the flattening assembly located in front of the peeling rod 4. The flattening assembly includes multiple parallel guide wheel mounting rods 62 and multiple guide wheels 63. Both ends of each guide wheel mounting rod 62 are fixed to the lower support 20, and multiple guide wheels 63 are mounted on each guide wheel mounting rod 62. The label pressure roller 61 is fixed to the main frame 10. In this embodiment, the foremost guide wheel mounting rod 23 serves as the front connecting rod 21 of the lower support 20, and it is rotatably connected to the main frame 10. After the label is peeled off, because the lower surface of the label has adhesive and the guide rollers 63 are narrow with a small contact area with the label, the spaced guide rollers 63 can effectively assist the label in moving forward and flatten the originally curled label. After the label leaves the flattening assembly and exits from the label outlet 9, during labeling, the label pressure rollers 61 apply downward pressure to the label, preventing it from floating and ensuring a more secure label adhesion.

[0045] The backing paper recycling mechanism 40 of this embodiment includes a horizontally arranged backing paper mounting rod 41, a backing paper locking rod (not shown), and a servo motor 42 for driving the backing paper mounting rod 41 to rotate. The servo motor 42 is electrically connected to the control mechanism 6. One end of the backing paper mounting rod 41 is fixed to the main frame 10. The backing paper mounting rod 41 has a locking groove 411 along the axial direction to match the shape of the backing paper locking rod. The backing paper locking rod is inserted into the locking groove 411. The backing paper, through the cooperation of the backing paper locking rod and the locking groove 411, fixes the starting end of the backing paper of the label roll to the backing paper mounting rod 41. The servo motor 42 rotates the backing paper mounting rod 41 to rewind the backing paper. After the label paper passes through the peeling rod 4, the label is peeled off, and the backing paper is wound around the backing paper mounting rod 41.

[0046] The label roll mounting mechanism 30 includes a label roll mounting rod 31 and a limiting member 32 for positioning the label roll. The limiting member 32 is disposed on the label roll mounting rod 31. Preferably, the limiting member 32 is a chuck with a through hole in the center for penetrating the label roll mounting rod 31. A spring-loaded tab 321 is provided on the inner wall of the through hole. One side of the spring-loaded tab 321 is fixedly connected to the inner wall of the through hole, and the other side abuts against the side wall of the label roll mounting rod 31. Alternatively, the limiting member 32 can be a pin. Multiple limiting holes are provided on the label roll mounting rod 31, and several corresponding limiting holes are also provided on the main frame 10. The position of the limiting hole through which the pin passes is determined according to the width of the label roll. The pin passes through both the limiting holes on the main frame 10 and the limiting holes on the label roll mounting rod 31 simultaneously to prevent the label roll from slipping outwards.

[0047] To enable more convenient handheld labeling, a handle 7 is also fixed on the main frame 10. The handle 7 is detachably connected to the main frame 10 or integrally formed.

[0048] In this embodiment, a display screen can also be installed on the main frame 10. The display screen is connected to the control mechanism 6, which makes it more intuitive and convenient to set the parameters of the printing and labeling machine.

[0049] The working process of this embodiment is as follows:

[0050] 1. Install the label roll, aligning the printing start side of one label on the label roll with the bottom of the printer core 3, and then fix the bottom paper onto the bottom paper recycling mechanism 40.

[0051] 2. The number of steps the stepper motor of the printer core 3 can advance is set through the control mechanism 6, which is the number of steps required to completely peel off the label. Then the number of steps to retreat is set, which is the number of steps required for the next label to be printed to retreat from the peeling rod 4 back to directly below the printer core 3.

[0052] 3. When printing begins, the control mechanism 6 simultaneously controls the servo motor 42 to rotate and rewind the base paper. When the label printing is completed and the paper label is peeled off, the stepper motor and servo motor 42 stop rotating at the same time.

[0053] 4. Retract the label paper. The control mechanism 6 controls the stepper motor according to the retraction steps, and at the same time controls the servo motor 42 to rotate in the opposite direction, retracting the bottom paper to cooperate with the retraction of the label paper until the label paper is repositioned directly below the printing core 3. At the same time, the stepper motor and servo motor 42 stop rotating. Repeat steps 3 and 4 until all labels are printed and labeled.

[0054] Example 2

[0055] To improve the intelligence of label positioning and the accuracy of controlling the stepper motor and servo motor 42 of the printer cartridge 3 in Embodiment 1, this embodiment adds a first sensor 1 for detecting whether the label has been successfully peeled off and a second sensor 2 for detecting the label gap, based on Embodiment 1.

[0056] Please further emphasize and combine Figure 4 The first sensor 1 is fixed to the main frame 10 and located in front of the peeling rod 4, and is electrically connected to the control mechanism 6. The second sensor 2 is fixed to the main frame 10 and located behind the printer core 3, and is electrically connected to the control mechanism 6. Preferably, both the first sensor 1 and the second sensor 2 can be reflective sensors.

[0057] The first sensor 1 detects whether there is a label at that position. When there is no label below the first sensor 1, the first sensor 1 will not receive a reflected signal; when there is a label below the first sensor 1, the first sensor 1 will receive a reflected signal, confirming that the label has been successfully peeled off. When the label printer is turned on, the first sensor 1 assists in label positioning. The process is as follows: the first label peeled off by the peeling rod 4 moves forward and is detected by the first sensor 1. Since the distance between the printer core 3 and the first sensor 1 is fixed, after the first sensor 1 detects the label, the control mechanism 6 first controls the stepper motor of the printer core 3 to move backward. The backward distance is the distance between the printer core 3 and the first sensor 1, thus achieving precise label alignment. This precise alignment mode is only calibrated during the first print and when the label was not peeled off during the previous print.

[0058] The second sensor 2 is fixed to the main frame 10 and arranged adjacent to the printer core 3, located behind the printer core 3. The voltage of the second sensor 2 varies depending on the thickness of the label paper. Specifically, when the label gap passes the second sensor 2, the paper thickness decreases, and the voltage of the second sensor 2 increases, thus determining the label gap. Therefore, in this embodiment, the second sensor 2 has three parameters: 1. The voltage value when the label-attached backing paper passes by, i.e., the voltage value when the paper is at its thickest; 2. The voltage value when only the backing paper passes by, i.e., the label gap; 3. The voltage value when there is no backing paper, i.e., the paper shortage state. When there is no paper, there is no obstruction, and the voltage value of the second sensor 2 is the highest. Therefore, the second sensor 2 can also be used to detect the paper shortage state. Because the distance the label is pushed forward to the peeling rod 4 is determined based on the distance from the second sensor 2 to the peeling rod 4, this printing and labeling machine is suitable for peeling labels of different sizes. Specifically: when the second sensor 2 detects the label gap, it is equivalent to detecting the bottom edge of the label. The distance the label continues to move forward is the distance from the second sensor 2 to the peeling rod 4. After moving this distance, the bottom edge of the label has been completely peeled off. Regardless of the width or size of the label, it can be completely peeled off.

[0059] To ensure the label paper is fed smoothly into the printer core 3, a steering limit shaft 8 is provided between the label roll mounting mechanism 30 and the second sensor 2. The steering limit shaft 8 is close to the label roll mounting mechanism 30 and its height is higher than that of the second sensor 2. The steering limit shaft 8 is detachably mounted on the main frame 10. The steering limit shaft 8 is disposed adjacent to the rear side of the main frame, and a steering gap is formed between them for the label paper to pass through. The steering gap flattens the label paper that was originally curled inward.

[0060] The working principle of the printing and labeling machine equipped with a first sensor 1 and a second sensor 2 is as follows:

[0061] Step 10, Equipment Assembly: Mount the label roll onto the label roll mounting rod 31, then install the limiting member 32. Open the lower bracket 20, pass the starting end of the label roll through the label paper reversing gap, around the peeling rod 4, and lock it onto the bottom paper rolling mechanism. Then close the lower bracket 20. Pull out the telescopic base, place the mobile terminal on the upper surface of the main frame 10, and then lock the mobile terminal in place to operate or view information.

[0062] Step 20, Bluetooth Connection: Turn on the Bluetooth function of your mobile device, search for and connect to the label printer;

[0063] Step 30, Operation Control: The control mechanism 6 receives the printing signal sent by the mobile terminal via Bluetooth, parses it, and sends it to the printer core for printing. Simultaneously, the servo motor 42 rotates counter-clockwise, and the label is peeled off when passing the peeling rod 4. The second sensor 2 detects the label gap, and then continues to move forward a specified number of steps, delivering the label to the label pressure roller 61 of the auxiliary labeling mechanism 60 for labeling. After labeling, the servo motor 42 rotates clockwise first, then the stepper motor of the printer core 3 retracts, positioning the starting position of the label directly below the printer core 3. The stepper motor then stops rotating, and the servo motor 42 rotates counter-clockwise for 200 milliseconds to tighten the label backing paper for the next print. Because of the first sensor 1 and the second sensor 2, this label printer can also be combined with a voice playback module to provide voice prompts, such as: "Please apply label," "Label not separated," "Gap value abnormal," and "Paper out," providing convenience for customers.

[0064] The above description is only a specific embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural transformations made based on the contents of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A low-maintenance hand-held printing labeler characterized by: The device includes a main frame, a lower support, a printer core, a bottom paper recycling mechanism, a label roll mounting mechanism, a peeling rod, a rubber roller, and a control mechanism. The printer core, bottom paper recycling mechanism, and label roll mounting mechanism are arranged sequentially from front to back and are all mounted on the main frame. The peeling rod and rubber roller are mounted on the lower support. The lower support is located below the main frame and is detachably connected to the main frame. The peeling rod is located in front of the printer core, and the rubber roller is located directly below the printer core. The control mechanism is fixed inside the main frame and is powered by a power source. The control mechanism is connected to both the bottom paper recycling mechanism and the printer core.

2. A low maintenance hand-held printing and labelling machine according to claim 1 wherein: It also includes a first sensor for detecting whether the label has been successfully peeled off. The first sensor is fixed on the main frame and located in front of the peeling rod. The first sensor is electrically connected to the control mechanism.

3. A low maintenance hand-held printing and labeling machine according to claim 1 wherein: It also includes a second sensor for detecting label gaps, the second sensor being fixed to the main frame and located behind the printer core, and the second sensor being electrically connected to the control mechanism.

4. A maintenance friendly hand-held printing and labeling machine according to claim 1, characterized in that: A synchronizing gear is provided at the end of the rubber roller, and the synchronizing gear meshes with the printing roller gear of the printing core.

5. A maintenance friendly hand-held printing and labeling machine according to claim 1, characterized in that: It also includes an auxiliary labeling mechanism, which includes a flattening assembly and a label pressure roller. The label pressure roller and the flattening assembly are arranged sequentially from front to back, and the flattening assembly is located in front of the peeling rod. The flattening assembly includes multiple parallel mounting rods and multiple guide wheels. The two ends of each mounting rod are fixed to the lower bracket, and multiple guide wheels are provided on each mounting rod. The label pressure roller is fixed to the main frame.

6. A maintenance friendly hand-held printing and labeling machine according to claim 1, characterized in that: The lower support has a front connecting rod on its front side and a U-shaped spring and a rear connecting rod on its rear side. The bottom of the U-shaped spring is fixed to the rear side of the lower support, and the two ends of the U-shaped spring abut against the rear connecting rod. The two ends of the rear connecting rod are set in the limiting grooves on the two side plates of the lower support. The main support has a slot for accommodating the rear connecting rod, and the opening of the slot faces the rear connecting rod.

7. A low maintenance hand-held printing and labeling machine according to claim 1 wherein: The backing paper recycling mechanism includes a horizontally arranged backing paper mounting rod, a backing paper locking rod, and a servo motor for driving the backing paper mounting rod to rotate. One end of the backing paper mounting rod is fixed to the main frame. The backing paper mounting rod has a locking groove along the axial direction to match the shape of the backing paper locking rod. The backing paper locking rod is inserted into the locking groove. The servo motor is electrically connected to the control mechanism. The label roll mounting mechanism includes a label roll mounting rod and a limiting member for positioning the label roll. The limiting member is disposed on the label roll mounting rod.

8. A maintenance friendly hand-held printing and labelling machine according to claim 7, characterized in that: The limiting component is a chuck, which has a through hole in the middle for passing through the label roll mounting rod. The inner wall of the through hole is provided with a spring-loaded tab, one side of which is fixedly connected to the inner wall of the through hole, and the other side abuts against the side wall of the label roll mounting rod.

9. The easy-to-maintain handheld printing and labeling machine according to claim 1, characterized in that: The upper surface of the main frame is provided with a telescopic bracket for fixing the mobile terminal device; a handle is also fixed on the main frame, and the handle is detachably connected to the main frame or integrally formed.

10. A maintenance-friendly hand-held printing and labeling machine according to claim 1, characterized in that The printer core is a print head with a built-in stepper motor. The control mechanism transmits printing data with the printer core and controls the number of forward or backward rotation steps of the stepper motor. The control mechanism is equipped with a wireless communication module, and the control mechanism also transmits data with a mobile terminal through the wireless communication module. The control mechanism transmits the received data to the printer core.

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