A label printing apparatus

Abstract

The present application relates to printing equipment technical field, specifically a label printing equipment, including lower shell, the upper end of lower shell is installed with detachable upper shell, the space formed by lower shell and upper shell is installed with seat plate, the upper surface one side edge of seat plate is installed with transmission box, the upper side of transmission box is equipped with label disc, the lower side of label disc is equipped with compression roller, the side of compression roller away from label outlet is equipped with lifting part for lifting label column, the label paper on label disc passes through compression roller, lifting part and reversing roller in turn, the side of compression roller away from lifting part is equipped with driving part for driving label paper to unfold from label disc, the side of driving part away from compression roller is equipped with cutting part for cutting label paper, the present application has the following beneficial effects: realize printing feeding, automatic cutting continuous operation, reduce artificial investment, improve label batch processing efficiency, adapt to the use requirement of uninterrupted production of assembly line.

Description

Technical Field

[0001] This invention relates to the field of printing equipment technology, specifically a label printing device. Background Technology

[0002] Currently, label printers on the market are mainly divided into three categories: thermal, thermal transfer, and inkjet. Each type of printer is widely used in signage printing operations in various scenarios such as supermarkets, warehouses, and manufacturing, thanks to their respective consumables and imaging advantages. However, the automation configuration of existing mainstream equipment is generally low. Most machines only complete the printing process of label images and text, and the cutting process after label forming lacks a linkage mechanism.

[0003] After the labels are printed, they need to be manually cut and separated using simple tools such as utility knives and scissors. When processing large batches of labels, repeated manual cutting consumes a significant amount of manpower, making it difficult to improve overall work efficiency. The drawbacks are even more pronounced in the processing of continuous rolls of label paper. After the continuous paper is continuously produced, manual segmented cutting is affected by subjective factors such as human feel, cutting angle, and applied force, resulting in uneven cuts and inconsistent label lengths, easily leading to processing errors such as over- or under-cut dimensions. Furthermore, prolonged repetitive cutting can easily cause hand fatigue, further increasing the probability of dimensional deviations, raising production costs, and hindering continuous production line operations. Summary of the Invention

[0004] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a label printing device to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a label printing device includes a lower housing, a detachable upper housing mounted on the upper end of the lower housing, a label outlet on the front of the lower housing, a base plate mounted in the space formed by the lower housing and the upper housing, a transmission box mounted on one edge of the upper surface of the base plate, a label tray mounted on the upper side of the transmission box, label paper wound on the label tray, a support arm rotatably connected to one side of the label tray, one end of the support arm being fixedly connected to the transmission box, a pressure roller mounted on the lower side of the label tray, one end of the pressure roller being rotatably connected to the transmission box, a lifting part for lifting the label column on the side of the pressure roller away from the label outlet, the lifting part being fixedly connected to the transmission box, a reversing roller rotatably connected to the transmission box on the lower side of the end of the lifting part away from the pressure roller, the label paper on the label tray sequentially passes over the pressure roller, the lifting part and the reversing roller, a driving component for driving the label paper to unfold from the label tray on the side of the pressure roller away from the lifting part, and a cutting component for cutting the label paper on the side of the driving component away from the pressure roller. The label tray, pressure roller, lifting section, and reversing roller are arranged in sequence to form a regular paper feeding channel. The label paper is smoothly conveyed along a fixed path, avoiding paper deviation and wrinkles. The drive unit and the cutting unit are arranged closely together to realize the integrated linkage of paper feeding and cutting processes. This eliminates the drawbacks of traditional models where printing and cutting are separate and manual cutting is required. The label paper roll can be quickly replaced by disassembling the upper shell, realizing automated continuous output cutting and improving label production efficiency.

[0006] Specifically, the driving component includes a power roller. A horizontally arranged power roller is located on the side of the pressure roller away from the lifting part. A power assembly providing power to the power roller is housed in the transmission box. A side plate is rotatably connected to the end of the power roller away from the transmission box. The lower end of the side plate is connected to a base plate via screws. A driven roller, cooperating with the power roller to press the label paper, is located on the upper side of the power roller. A support is located on the upper side of the driven roller, and the support is connected to the transmission box via screws. A pressing assembly for moving the driven roller downwards is located between the support and the driven roller. The power roller, combined with the elastically pressing driven roller, forms a paper-feeding clamping mechanism. The driven roller presses the label paper downwards using the elastic force of a first compression spring, increasing the friction between the roller and the label. This prevents slippage and idle rotation during the conveying process, and the paper feeding length is controllable. A servo motor rotates the power roller via a synchronous transmission structure, resulting in a stable and uniform paper feeding speed that can match the set label size, avoiding length and size errors caused by manual cutting from the paper feeding source.

[0007] Specifically, the power assembly includes a servo motor, which is mounted on the upper side of the base plate. The servo motor is connected to the transmission box via screws. The output shaft of the servo motor extends into the transmission box and is fitted with a first synchronous pulley. One end of the power roller extends into the transmission box and is fitted with a second synchronous pulley. The first synchronous pulley is connected to the second synchronous pulley via a synchronous toothed belt. The use of the first synchronous pulley, the second synchronous pulley, and the synchronous toothed belt transmission ensures stable power transmission from the servo motor to the power roller. Synchronous transmission eliminates issues of slippage and tooth slippage, further guaranteeing paper feeding accuracy.

[0008] Specifically, the pressing assembly includes side arms, with each of the two parallel sides of the support rotatably connected to a side arm. The two ends of the driven roller are rotatably connected to the two side arms respectively. A cross plate is installed between the two side arms, and two first compression springs are connected to the upper surface of the cross plate. The lower surface of the support is recessed upwards to form two blind holes, with the upper ends of the first compression springs extending into the blind holes. The side arms, cross plate, and first compression springs together constitute an elastic pressing structure for the driven roller. The first compression springs are embedded inside the blind holes, providing reliable positioning and continuously providing downward pressure to the driven roller. This adapts to label papers of different thicknesses, allowing for the secure clamping and conveying of both thick and thin labels.

[0009] Specifically, a waist-shaped hole is provided on the upper part of one side surface of the side arm, and a limiting head is inserted into the waist-shaped hole. One end of the limiting head is connected and fixed to the support. The waist-shaped hole and the limiting head work together to limit the range of motion of the side arm.

[0010] Specifically, the cutting component includes a cutting blade. A cutting blade is provided between the power roller and the label outlet. A top plate is fixedly connected to the upper end of the cutting blade. A multi-faceted rod is installed at the center of the upper surface of the top plate. A stepped groove is formed by a downward indentation on the upper surface of the support near the cutting blade. A multi-faceted hole is opened at the center of the stepped groove. The upper end of the multi-faceted rod passes through the multi-faceted hole and extends to the upper side of the support. A limiting plate is connected to the upper end of the multi-faceted rod by a screw. A second compression spring is provided between the limiting plate and the multi-faceted hole. The second compression spring is sleeved on the multi-faceted rod. Two symmetrically arranged circular openings are opened at the bottom of the stepped groove. An electromagnet connected to the support is provided at each circular opening. Two permanent magnets aligned with the circular openings are installed on the upper surface of the top plate. The electromagnets repel the permanent magnets when energized. A rubber roller for supporting the label paper is provided below the cutting blade. A vertical plate is rotatably connected to one end of the rubber roller. The lower end of the vertical plate is connected to the base plate by a screw. The cutting blade is driven downwards by the repulsion between an electromagnet and a permanent magnet. A second compression spring automatically rebounds and resets the cutting blade when power is cut off, replacing manual cutting. A rubber roller is installed below the cutting blade to flexibly support the label. The label paper is stably supported during cutting, preventing deformation and rough edges caused by tearing. The cut surface is flat and uniform, solving the problems of skewed cuts, large dimensional deviations, and high label scrap rates caused by manual cutting. The multi-faceted rod and multi-faceted hole work together to guide the cutting blade, ensuring that the cutting blade does not deviate when moving up and down, and the cutting point is precise and stable.

[0011] Specifically, an insulating cylinder is provided on one side of the side plate. A connecting seat is connected to the lower end of the insulating cylinder, and the connecting seat is connected to the side plate by screws. The upper end of the insulating cylinder is open. A resistor column, concentrically arranged with the insulating cylinder and electrically connected to the servo motor, is installed inside the insulating cylinder. A conductive slip ring is fitted onto the resistor column and slides with it. The conductive slip ring is electrically connected to an external power source that provides power to the servo motor. A vertical groove is formed on the outer surface of the insulating cylinder, and an insulating plate is inserted into the groove. One end of the insulating plate is connected and fixed to the conductive slip ring. An insulating rod is installed on one end of the top plate, and the lower end of the insulating rod is connected and fixed to the end of the insulating plate away from the conductive slip ring. During the lifting and lowering of the cutting blade, the conductive slip ring slides along the resistor column through the insulating rod. After the conductive slip ring is displaced, it changes the circuit resistance connected to the servo motor, automatically adjusting the servo motor speed. At the moment of cutting, the resistance is increased and the paper feeding speed is slowed down to avoid the cutting blade blocking the continuous feeding of the label paper and causing paper jams. This achieves electrical linkage between cutting and paper feeding actions, and the process runs automatically in a closed loop without manual intervention, improving the degree of automation.

[0012] Specifically, a connecting sleeve is fixedly connected to the upper end of the insulating rod, and the connecting sleeve is installed on the lower surface of the top plate. The connecting sleeve ensures a stable connection between the insulating rod and the top plate.

[0013] Specifically, a rod head is installed at one end of the rubber roller near the vertical plate. The rod head is rotatably connected to the side plate, and a rubber sleeve is fitted onto the rod head and adhered to it. The insulating rod is in contact with the rubber sleeve. The rubber sleeve is located on the outside of the rod head. When the insulating rod rises and falls, it drives the rubber roller to rotate by friction, so that different positions on the circumference of the rubber roller are subjected to cutting pressure in turn. This achieves uniform wear of the rubber roller, avoids long-term pressure indentation at a single point, and extends the service life of the rubber roller.

[0014] Specifically, two blocking rods are installed on the upper surface of the top plate. The two blocking rods are symmetrically arranged about the polygonal rod. In the initial state, under the action of the rebound force of the second compression spring, the upper end of the blocking rod is in contact with the bottom of the support. The height of the blocking rod is higher than the height of the permanent magnet. The symmetrically arranged blocking rods on the top plate are tightened and limited by the second compression spring, which limits the maximum upward stroke of the cutting blade and prevents the permanent magnet from colliding with the electromagnet.

[0015] The beneficial effects of this invention are: The cutting blade is driven downward by the repulsive force of an electromagnet and a permanent magnet, and a rubber roller supports the label paper to achieve instantaneous cutting. At this time, the second compression spring generates elastic deformation. After the power is cut off, the second compression spring pulls the cutting blade to automatically reset, completing a single cutting cycle. This avoids quality problems such as inconsistent lengths and crooked cuts that occur with manual cutting, reduces the label scrap rate, and enables continuous operation of printing, feeding, and automatic cutting. It reduces manual input, improves the efficiency of batch label processing, and is suitable for the needs of uninterrupted production lines.

[0016] As the cutting blade descends, it simultaneously drives the insulating rod and conductive slip ring to slide along the resistor column, changing the resistance of the servo motor's circuit. This changes the servo motor's rotation speed; when the conductive slip ring moves down, the resistance of the servo motor's circuit increases, and the servo motor's speed decreases. Conversely, the servo motor's speed returns to normal. This achieves coordinated paper feeding and cutting actions. After each cut, the paper feeding speed slows down to prevent the cutting blade from obstructing the subsequent label paper delivery, ensuring that the label paper can be smoothly removed from the label exit.

[0017] The insulating rod slides in contact with the rubber sleeve on the column head. When the insulating rod rises or falls, the rubber roller rotates due to the friction between the insulating rod and the rubber sleeve. This makes it easier for the cutting blade to contact different parts of the rubber roller, which is beneficial for the uniform wear of the rubber roller. Attached Figure Description

[0018] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings: Figure 1 This is a schematic diagram of the structure of a label printing device according to the present invention; Figure 2This is an assembly diagram of the cutting blade, label tray, and base plate in a label printing device according to the present invention; Figure 3 This is a schematic diagram of the assembly of the cutting blade, label tray, and base plate in a label printing device according to the present invention from another perspective. Figure 4 This is a perspective view of a support in a label printing device according to the present invention; Figure 5 This is an assembly diagram of the cutting blade, power roller, and support in a label printing device according to the present invention; Figure 6 This is a schematic diagram of the assembly of a rubber roller, a cutting blade, and a support in a label printing device according to the present invention; Figure 7 This is a schematic diagram of the assembly of the multi-faceted rod, rubber roller, and cutting blade in a label printing device of the present invention; Figure 8 This is an exploded structural diagram of the insulating rod, resistor column, and insulating cylinder in a label printing device of the present invention; In the diagram: 100, lower housing; 101, upper housing; 102, label outlet; 200, base plate; 201, transmission box; 300, label tray; 301, support arm; 302, pressure roller; 303, lifting part; 304, reversing roller; 400, servo motor; 401, first synchronous pulley; 402, synchronous toothed belt; 403, second synchronous pulley; 500, support; 501, side arm; 5011, cross plate; 5012, first compression spring; 502, side plate; 503, stepped groove; 5031, round opening; 5032, polygonal shape. Hole; 504, Power roller; 505, Driven roller; 506, Limiting head; 600, Insulating cylinder; 601, Insulating rod; 6011, Connecting sleeve; 6012, Insulating plate; 602, Connecting seat; 603, Resistance column; 6031, Conductive slip ring; 604, Vertical groove; 700, Cutting knife; 701, Top plate; 702, Electromagnet; 703, Permanent magnet; 704, Rubber roller; 7041, Vertical plate; 7042, Column head; 7043, Rubber sleeve; 705, Multi-faceted rod; 7051, Limiting plate; 7052, Second compression spring. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] Please see Figures 1 to 8This invention provides a technical solution: a label printing device, including a lower housing 100, a detachable upper housing 101 installed on the upper end of the lower housing 100, a label outlet 102 on the front of the lower housing 100, a base plate 200 installed in the space formed by the lower housing 100 and the upper housing 101, a transmission box 201 installed on one edge of the upper surface of the base plate 200, a label tray 300 on the upper side of the transmission box 201, label paper wound on the label tray 300, a support arm 301 rotatably connected to one side of the label tray 300, one end of the support arm 301 being connected and fixed to the transmission box 201, the support arm 301 serving to connect the label tray 300 and the transmission box 201, and the label tray 300 can be easily replaced after the upper housing 101 is removed.

[0021] A pressure roller 302 is provided on the lower side of the label tray 300. One end of the pressure roller 302 is rotatably connected to the transmission box 201. A lifting part 303 for lifting the label column is provided on the side of the pressure roller 302 away from the label outlet 102. The lifting part 303 is connected and fixed to the transmission box 201. A reversing roller 304 rotatably connected to the transmission box 201 is provided on the lower side of the end of the lifting part 303 away from the pressure roller 302. The label paper on the label tray 300 passes around the pressure roller 302, the lifting part 303 and the reversing roller 304 in sequence. The pressure roller 302, the lifting part 303 and the reversing roller 304 work together to restrict the conveying path of the label paper, so that the print head is positioned on the upper side of the lifting part 303. When the label paper moves to the upper side of the lifting part 303, the print head can print the corresponding graphics and text information on the label paper.

[0022] A horizontally arranged power roller 504 is provided on the side of the pressure roller 302 away from the lifting part 303. A side plate 502 is rotatably connected to the end of the power roller 504 away from the transmission box 201. The lower end of the side plate 502 is connected to the base plate 200 by screws. A driven roller 505 is provided on the upper side of the power roller 504, cooperating with the power roller 504 to press the label paper. A servo motor 400 is provided on the upper side of the base plate 200. The servo motor 400 is connected to the transmission box 201 by screws. The output shaft of the servo motor 400 extends into the transmission box 201 and is fitted with a first synchronous pulley 401. One end of the power roller 504 extends into the transmission box 201 and is fitted with a second synchronous pulley 403. The first synchronous pulley 401 is connected via… The synchronous toothed belt 402 is connected to the second synchronous pulley 403. The two parallel sides of the support 500 are rotatably connected to the side arms 501. The two ends of the driven roller 505 are rotatably connected to the two side arms 501 respectively. A horizontal plate 5011 is installed between the two side arms 501. Two first compression springs 5012 are connected to the upper surface of the horizontal plate 5011. The lower surface of the support 500 is recessed upward to form two blind holes. The upper ends of the first compression springs 5012 extend into the blind holes. A waist-shaped hole is opened at the upper part of one side of the side arm 501. A limit head 506 is inserted into the waist-shaped hole. One end of the limit head 506 is connected and fixed to the support 500. The waist-shaped hole and the limit head 506 cooperate to limit the range of motion of the side arm 501.

[0023] The first synchronous pulley 401, the second synchronous pulley 403, and the synchronous toothed belt 402 are used to drive the servo motor 400 to the power roller 504 stably. The synchronous transmission has no problems of loss of rotation or slippage, which further ensures the accuracy of paper feeding and metering. The side arm 501 and the horizontal plate 5011, together with the first compression spring 5012, form an elastic downward pressing structure for the driven roller 505. The first compression spring 5012 is embedded in the blind hole, which is reliable in limiting the position and can continuously provide downward pressing force for the driven roller 505. It is suitable for label paper of different thicknesses, and both thick and thin labels can be firmly clamped and transported.

[0024] A support 500 is provided on the upper side of the driven roller 505. The support 500 is connected to the transmission box 201 by screws. A cutting blade 700 is provided between the power roller 504 and the label outlet 102. A top plate 701 is fixedly connected to the upper end of the cutting blade 700. A multi-faceted rod 705 is installed in the middle of the upper surface of the top plate 701. The side of the upper surface of the support 500 near the cutting blade 700 is recessed downward to form a stepped groove 503. A multi-faceted hole 5032 is opened in the middle of the stepped groove 503, so that the upper end of the multi-faceted rod 705 passes through the multi-faceted hole 5032 and extends to the upper side of the support 500, thereby restricting the movement trajectory of the cutting blade 700.

[0025] The upper end of the multi-faceted rod 705 is connected to a limiting plate 7051 by screws. A second compression spring 7052 is provided between the limiting plate 7051 and the multi-faceted hole 5032. The second compression spring 7052 is sleeved on the multi-faceted rod 705. Two symmetrically arranged circular openings 5031 are opened at the bottom of the stepped groove 503. Electromagnets 702 connected to the support 500 are provided in the circular openings 5031. Two permanent magnets 703 aligned with the circular openings 5031 are installed on the upper surface of the top plate 701. When the electromagnets 702 are energized, they repel the permanent magnets 703. A rubber roller 704 for supporting the label paper is provided on the lower side of the cutting blade 700. A vertical plate 7041 is rotatably connected to one end of the rubber roller 704. The lower end of the vertical plate 7041 is connected to... The screw is connected to the base plate 200. When the electromagnet 702 is energized, it generates a repulsive force with the permanent magnet 703, pushing the cutting blade 700 downward. The cutting operation is completed by relying on the support of the rubber roller 704 on the label paper. During the cutting process, the second compression spring 7052 is compressed and stored energy. After the electromagnet 702 is de-energized, the second compression spring 7052 releases its elastic force and drives the cutting blade 700 to rise and reset, thus completing a complete cut. The entire cutting action is completed automatically, eliminating defects such as uneven size and twisted cuts caused by manual cutting, reducing material waste. The equipment can complete the paper feeding, printing and cutting processes in a continuous manner, eliminating the manual material cutting step, saving labor costs, and meeting the conditions for continuous mass production on the production line.

[0026] Two blocking rods are installed on the upper surface of the top plate 701. The two blocking rods are symmetrically arranged about the polygonal rod 705. In the initial state, under the action of the rebound force of the second compression spring 7052, the upper end of the blocking rod contacts the bottom of the support 500. The height of the blocking rod is higher than the height of the permanent magnet 703. The blocking rod limits the maximum upward stroke of the cutting blade 700 to prevent the permanent magnet 703 from hitting the electromagnet 702 hard.

[0027] An insulating cylinder 600 is provided on one side of the side plate 502. A connecting seat 602 is connected to the lower end of the insulating cylinder 600. The connecting seat 602 is connected to the side plate 502 by screws. The upper end of the insulating cylinder 600 is open. A resistor column 603, which is electrically connected to the servo motor 400, is installed inside the insulating cylinder 600 and is arranged concentrically with the insulating cylinder 600. A conductive slip ring 6031 is fitted on the resistor column 603 and slides with the resistor column 603. The conductive slip ring 6031 is electrically connected to an external power source that provides power to the servo motor 400. A vertical groove 604 is opened on the outer surface of the insulating cylinder 600. An insulating plate 6012 is inserted into the vertical groove 604. One end of the insulating plate 6012 is connected and fixed to the conductive slip ring 6031. An insulating rod 601 is installed on one end of the top plate 701. The lower end of the insulating rod 601 is away from the conductive plate 6012. One end of the slip ring 6031 is fixedly connected, and a connecting sleeve 6011 is fixedly connected to the upper end of the insulating rod 601. The connecting sleeve 6011 is installed on the lower surface of the top plate 701. The connecting sleeve 6011 realizes a stable connection between the insulating rod 601 and the top plate 701. When the cutting blade 700 falls, the insulating rod 601 pulls the conductive slip ring 6031 to slide on the resistor column 603, thereby changing the circuit resistance value to adjust the speed of the servo motor 400. When the conductive slip ring 6031 moves down, the circuit resistance increases, and the servo motor 400 slows down to feed the material. When the cutting blade 700 rises, the conductive slip ring 6031 moves up and the resistance decreases, and the speed of the servo motor 400 returns to normal. Relying on this linkage control, the cutting stage automatically decelerates to prevent the cutting blade 700 from obstructing the subsequent label paper and ensure that the cut label paper is smoothly fed out from the discharge port.

[0028] A rod head 7042 is installed at one end of the rubber roller 704 near the vertical plate 7041. The rod head 7042 is rotatably connected to the side plate 502. A rubber sleeve 7043 is fitted on the rod head 7042 and is bonded to the rod head 7042. The insulating rod 601 is in contact with the rubber sleeve 7043. The insulating rod 601 is in sliding contact with the rubber sleeve 7043 on the rod head. When the insulating rod 601 rises or falls, the rubber roller 704 rotates by the friction between the insulating rod 601 and the rubber sleeve 7043, which makes it easier for the cutting blade 700 to contact different parts of the rubber roller 704, which is beneficial to the uniform wear of the rubber roller 704.

[0029] Although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A label printing device, comprising a lower housing (100), characterized in that: A detachable upper shell (101) is installed on the upper end of the lower shell (100). A label outlet (102) is provided on the front of the lower shell (100). A seat plate (200) is installed in the space formed by the lower shell (100) and the upper shell (101). A transmission box (201) is installed on one edge of the upper surface of the seat plate (200). A label tray (300) is provided on the upper side of the transmission box (201). Label paper is wound on the label tray (300). A support arm (301) is rotatably connected to one side of the label tray (300). One end of the support arm (301) is connected and fixed to the transmission box (201). A pressure roller (302) is provided on the lower side of the label tray (300). One end of the pressure roller (302) is connected to the transmission box (201). 01) Rotary connection, the pressure roller (302) is provided with a lifting part (303) for lifting the label column on the side away from the label outlet (102). The lifting part (303) is connected and fixed to the transmission box (201). The lower side of the end of the lifting part (303) away from the pressure roller (302) is provided with a reversing roller (304) rotatably connected to the transmission box (201). The label paper on the label tray (300) passes around the pressure roller (302), the lifting part (303) and the reversing roller (304) in sequence. The side of the pressure roller (302) away from the lifting part (303) is provided with a driving member for driving the label paper to unfold from the label tray (300). The side of the driving member away from the pressure roller (302) is provided with a cutting member for cutting the label paper.

2. The label printing device according to claim 1, characterized in that: The driving component includes a power roller (504). The pressure roller (302) is provided with a horizontally arranged power roller (504) on the side away from the lifting part (303). The transmission box (201) is provided with a power assembly that provides power to the power roller (504). The end of the power roller (504) away from the transmission box (201) is rotatably connected to a side plate (502). The lower end of the side plate (502) is connected to the seat plate (200) by screws. The upper side of the power roller (504) is provided with a driven roller (505) that cooperates with the power roller (504) to press the label paper. The upper side of the driven roller (505) is provided with a support (500). The support (500) is connected to the transmission box (201) by screws. A pressing assembly for moving the driven roller (505) downward is provided between the support (500) and the driven roller (505).

3. The label printing device according to claim 2, characterized in that: The power assembly includes a servo motor (400), and the servo motor (400) is provided on the upper side of the seat plate (200). The servo motor (400) is connected to the transmission box (201) by screws. The output shaft of the servo motor (400) extends into the transmission box (201) and is equipped with a first synchronous pulley (401). One end of the power roller (504) extends into the transmission box (201) and is equipped with a second synchronous pulley (403). The first synchronous pulley (401) is connected to the second synchronous pulley (403) through a synchronous toothed belt (402).

4. The label printing device according to claim 3, characterized in that: The pressing assembly includes side arms (501), and the support (500) has two parallel sides rotatably connected to the side arms (501). The two ends of the driven roller (505) are rotatably connected to the two side arms (501) respectively. A horizontal plate (5011) is installed between the two side arms (501). Two first compression springs (5012) are connected to the upper surface of the horizontal plate (5011). The lower surface of the support (500) is recessed upward to form two blind holes. The upper end of the first compression springs (5012) extends into the blind holes.

5. A label printing device according to claim 4, characterized in that: A waist-shaped hole is provided on the upper part of one side of the side arm (501), and a limiting head (506) is inserted into the waist-shaped hole. One end of the limiting head (506) is connected and fixed to the support (500).

6. A label printing device according to claim 5, characterized in that: The cutting component includes a cutting blade (700). The cutting blade (700) is provided between the power roller (504) and the label outlet (102). A top plate (701) is fixedly connected to the upper end of the cutting blade (700). A multi-faceted rod (705) is installed at the middle position of the upper surface of the top plate (701). A stepped groove (503) is formed by a downward indentation on the side of the upper surface of the support (500) near the cutting blade (700). A multi-faceted hole (5032) is opened at the middle position of the stepped groove (503). The upper end of the multi-faceted rod (705) passes through the multi-faceted hole (5032) and extends to the upper side of the support (500). A limiting plate (7051) is connected to the upper end of the multi-faceted rod (705) by a screw. The limiting plate (7051) and the multi-faceted hole (5032) are connected together. A second compression spring (7052) is provided, which is sleeved on the polygonal rod (705). Two symmetrically arranged circular openings (5031) are opened at the bottom of the stepped groove (503). An electromagnet (702) connected to the support (500) is provided in the circular opening (5031). Two permanent magnets (703) aligned with the circular openings (5031) are installed on the upper surface of the top plate (701). The electromagnets (702) repel the permanent magnets (703) when energized. A rubber roller (704) for holding up the label paper is provided on the lower side of the cutter (700). A vertical plate (7041) is rotatably connected to one end of the rubber roller (704). The lower end of the vertical plate (7041) is connected to the base plate (200) by screws.

7. A label printing device according to claim 6, characterized in that: An insulating cylinder (600) is provided on one side of the side plate (502). A connecting seat (602) is connected to the lower end of the insulating cylinder (600). The connecting seat (602) is connected to the side plate (502) by screws. The upper end of the insulating cylinder (600) is open. A resistor column (603) that is concentrically arranged with the insulating cylinder (600) and electrically connected to the servo motor (400) is installed inside the insulating cylinder (600). A conductive slip ring (6031) that slides with the resistor column (603) is sleeved on the resistor column (603). The conductive slip ring (6031) is electrically connected to an external power source that provides power to the servo motor (400). A vertical groove (604) is provided on the outer surface of the insulating cylinder (600). An insulating plate (6012) is inserted in the vertical groove (604). One end of the insulating plate (6012) is connected and fixed to the conductive slip ring (6031). An insulating rod (601) is installed on one end of the top plate (701). The lower end of the insulating rod (601) is connected and fixed to the end of the insulating plate (6012) away from the conductive slip ring (6031).

8. A label printing device according to claim 7, characterized in that: The upper end of the insulating rod (601) is connected and fixed with a connecting sleeve (6011), and the connecting sleeve (6011) is installed on the lower surface of the top plate (701).

9. A label printing device according to claim 7, characterized in that: The rubber roller (704) has a rod head (7042) installed at one end near the vertical plate (7041). The rod head (7042) is rotatably connected to the side plate (502). A rubber sleeve (7043) is fitted on the rod head (7042) and is bonded to the rod head (7042). The insulating rod (601) is in contact with the rubber sleeve (7043).

10. A label printing device according to claim 6, characterized in that: Two blocking rods are installed on the upper surface of the top plate (701). The two blocking rods are symmetrically arranged about the polygonal rod (705). In the initial state, under the action of the rebound force of the second compression spring (7052), the upper end of the blocking rod is in contact with the bottom of the support (500). The height of the blocking rod is higher than the height of the permanent magnet (703).

Images