Label printing device for marking machine

Abstract

The invention relates to the technical field of label printing, in particular to a label printing device for a marking machine, which comprises a base, a shell fixedly covers the base, a groove is formed in the top end of the base, a paper outlet is formed in one end of the shell in a penetrating manner, and a cutting mechanism is arranged at the position, close to the paper outlet, of the inner top wall of the shell. A paper tube is detachably and rotatably connected to the interior of the shell, thermo-sensitive paper is wound on the paper tube, a penetrating opening is formed in the top end of the shell in a penetrating mode, and the position of the penetrating opening corresponds to the position of the paper tube. According to the invention, not only can offset or inclined thermo-sensitive paper be corrected before printing work, but also continuous sliding friction between the heating block and the thermo-sensitive paper in the printing process can be effectively avoided, and the influence of the heating block with residual heat on the thermo-sensitive paper after use can be effectively avoided; and effective heat dissipation of the other heating blocks which do not move downwards can be achieved while normal printing of the heating blocks which move downwards is guaranteed, and then the printing quality and the printing efficiency of the device are guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of label printing, and in particular to a label printing device for a marking machine. Background Art

[0002] A label printing device is a device specially used for printing labels. Its main function is to transfer the graphic information on the printing plate to the label material to meet the identification needs of various commodities. These labels are usually used in commodity packaging, logistics tracking, product descriptions, etc., and play a key role in the identification, classification, tracking and management of commodities. Most of the existing label printing devices use thermal printing technology. The working principle of this technology is to selectively heat the thermal paper through a small electronic heater on the print head, so that the special coating on the paper (such as colorless dyes and color developers) reacts chemically, thereby changing color to form graphics.

[0003] When the existing printing device using thermal printing technology is in use, the print head needs to be continuously heated to induce a chemical reaction on the thermal paper. Therefore, after long-term use, the print head is easily affected by the accumulated heat, and the overheating protection mechanism may even be triggered to shut down, thereby reducing the printing quality and printing efficiency of the printing device. In addition, when the existing printing device is printing, the print head is always in contact with the surface of the thermal paper. Therefore, when printing, there will be continuous sliding friction between the print head and the thermal paper. As the number of prints increases, the friction between the print head and the thermal paper will gradually increase, causing the surface material of the print head to gradually wear. This wear will not only reduce the printing quality and service life of the print head, but also make it more likely to become an "adsorption point" for impurities such as dust, thereby interfering with the normal printing of the print head and making the printed image information unclear, further reducing the printing quality and poor practicality. Summary of the invention

[0004] The purpose of the present invention is to solve the problem that after long-term use, the printing device using thermal printing technology in the prior art is prone to reduce the printing quality and printing efficiency of the entire printing device due to the accumulation of heat on its print head and the continuous friction with the thermal paper, and to propose a label printing device for a marking machine.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a label printing device for a marking machine, comprising a base, a fixed cover provided with a shell on the base, a groove provided at the top of the base, a paper outlet provided at one end of the shell, and a cutting mechanism provided at a position near the paper outlet on the inner top wall of the shell, a paper tube detachably and rotatably connected to the inside of the shell, a thermal paper wound around the paper tube, a through-hole provided at the top of the shell, the position of the through-hole corresponding to the position of the paper tube, and an opening and closing door movably installed on the through-hole, a paper conveying mechanism provided on the inner top wall of the shell, and further comprising: A control center, wherein two groups of connecting rods are symmetrically installed on the top of the control center, and the control center is fixedly connected to the top wall of the housing through the two groups of connecting rods. The control center is in an inverted L shape, and multiple groups of sensing frames are evenly installed on the side of the control center away from the paper feeding mechanism; A deflection correction mechanism, which is arranged on the bottom wall of the groove on the base and the top wall of the shell, and is located between the paper conveying mechanism and the control center, and is used to correct the thermal paper that is offset or tilted; A heat dissipation printing mechanism, the heat dissipation printing mechanism includes a transmission component, a reset component and a heat dissipation plate, the transmission component is arranged on the control center, and a heat dissipation belt is wound around the transmission component, the transmission component is used to make the heat dissipation belt rotate, the reset component is evenly installed on the bottom surface of the control center located above, and multiple groups of heating blocks are installed at the bottom of the reset component, the reset component is used to make multiple groups of heating blocks move down individually and reset after moving down, multiple groups of heating blocks are installed at the bottom of multiple groups of heating blocks. Multiple groups of heating resistors arranged in an array are installed, and the spacing between two groups of heating blocks located at the edge of the multiple groups of heating blocks is slightly larger than the width of the thermal paper, multiple groups of heating blocks are installed with heat dissipation blocks, the heat dissipation plate is fixedly installed on the inner top wall of the shell, and a pressing component is arranged at the bottom of the heat dissipation plate for reciprocatingly pressing down each group of heat dissipation blocks, the heat dissipation belt is located at the lower part and contacts with the pressing component, and multiple groups of heat dissipation blocks extend outward at one end toward the pressing component, one group of heat dissipation blocks contacts with the pressing component, and the other multiple groups of heat dissipation blocks extend outward at one end and contact with the top surface of the lower part of the heat dissipation belt.

[0006] Preferably, the transmission assembly includes two groups of mounting blocks, and the two groups of mounting blocks are symmetrically installed on the top of the control center, one group of mounting blocks is equipped with a driving motor at one end facing the heat sink, and the output end of the driving motor is fixedly connected to a group of steering shafts, and the other group of mounting blocks is rotatably connected to one end facing the heat sink, and the control center is symmetrically rotatably connected to another two groups of steering shafts on one side facing the heat sink, and the positions of the two groups of steering shafts at the bottom correspond to the positions of the two groups of steering shafts at the top, and the heat dissipation belt is wound around the four groups of steering shafts.

[0007] Preferably, the reset assembly includes multiple sets of sleeve rods, multiple sets of the sleeve rods are fixedly installed on the control center, and multiple sets of sleeve rods are sealed and slidably connected with sealing blocks, multiple sets of the sealing blocks are fixedly connected with spring rods at the bottom ends, multiple sets of the spring rods bottom ends penetrate the corresponding sleeve rod inner bottom walls and are fixedly connected with folding rods, the number of multiple sets of folding rods is the same as the number of multiple sets of sensing frames, multiple sets of spring rods are outerly provided with springs, two ends of the springs are respectively fixedly connected to the bottom wall of the sealing block and the inner bottom wall of the sleeve rod, multiple sets of sensing frames are penetrated with through openings, the control center is provided with multiple sets of longitudinal grooves on the side facing the heat dissipation plate, the positions of the multiple sets of longitudinal grooves correspond to the positions of the multiple sets of through openings, one end of the multiple sets of folding rods respectively passes through the multiple sets of through openings and is inserted in the multiple sets of longitudinal grooves, the top wall of the folding rod located in the longitudinal groove contacts the inner top wall of the longitudinal groove, and the other ends of the multiple sets of folding rods are respectively fixedly connected to the multiple sets of heating blocks.

[0008] Preferably, the pressing assembly includes an electric slide rail, which is installed at the bottom end of the heat sink, and a moving block is fixedly connected to the slider on the electric slide rail, and a pressing wheel, two groups of lifting wheels and two groups of separation wheels are respectively installed on the moving block, the two groups of lifting wheels and the two groups of separation wheels are all located below the pressing wheel, the two groups of separation wheels are located between the two groups of lifting wheels, and the height of the two groups of separation wheels is lower than the height of the two groups of lifting wheels, the top surface and bottom surface of the lower part of the heat dissipation belt are respectively in contact with the downward outer walls of the two groups of separation wheels and the upward outer walls of the two groups of lifting wheels, the top end of one group of heat dissipation blocks is in contact with the pressing wheel, and the bottom wall of one end of the heat dissipation blocks extending outward is in contact with the upward outer walls of the two groups of separation wheels.

[0009] Preferably, the correction mechanism includes an L-shaped plate and multiple groups of infrared sensors, the L-shaped plate is fixedly mounted on the inner top wall of the shell, and the bottom end of the L-shaped plate is fixedly connected to a control board, two groups of support rods are symmetrically mounted at the bottom end of the L-shaped plate near the control center, the bottom ends of the two groups of support rods are fixedly connected to the control center, multiple groups of infrared sensors are respectively mounted at the bottom ends of multiple groups of sensing frames, two groups of arc-shaped slide grooves are symmetrically opened at the bottom end of the control board, cylindrical shafts are slidably connected in the two groups of arc-shaped slide grooves, and the track path of each group of arc-shaped slide grooves is based on the other group of arc-shaped slide grooves. The axis of the cylindrical shaft in the arc-shaped slide groove is a section of the arc center, the two groups of cylindrical shafts are respectively located at the ends of the two groups of arc-shaped slide grooves, and the bottom ends of the two groups of cylindrical shafts are connected to a movable plate for common rotation, and two groups of external plates are symmetrically installed at the bottom end of the movable plate, and servo motors are installed on the two groups of external plates, and the output ends of the two groups of servo motors are fixedly connected with rotating rods, and the two groups of rotating rods are penetrated and fixedly connected with adjusting wheels, and the two groups of adjusting wheels are located directly below the two groups of cylindrical shafts, and a lifting component is arranged on the groove on the base for making the thermal paper contact with the adjusting wheel.

[0010] Preferably, the lifting assembly is located below the two groups of adjusting wheels, and the lifting assembly includes four groups of telescopic rods, the four groups of telescopic rods are evenly installed on the bottom wall of the groove, and the output ends of the four groups of telescopic rods are commonly connected to a platform, the top surface of the platform is parallel to the top surface of the base where no groove is provided, and the side wall on one side of the platform is in contact with the side wall of the groove.

[0011] Preferably, two groups of connecting rings are rotatably connected to the rotating rod, the two groups of connecting rings are located on both sides of the adjusting wheel, and connecting blocks are installed on the top of the two groups of connecting rings. The two groups of connecting rings are fixedly connected to the external plate through the two groups of connecting blocks.

[0012] Preferably, the width of the thermal paper is slightly larger than the center distance between the two sets of adjusting wheels.

[0013] Preferably, it also includes an auxiliary heat dissipation mechanism, which includes a first air duct and a second air duct, the first air duct is arranged through an L-shaped plate, and a plurality of fans are installed on the L-shaped plate, and the plurality of fans are located at the opening above the first air duct, and the opening below the first air duct is oriented to correspond to the upper part of the heat dissipation belt, an air inlet is arranged through the outer top wall of the shell, and the position of the air inlet corresponds to the positions of the plurality of fans, the second air duct is arranged through the heat dissipation plate, and the opening above the second air duct is oriented to correspond to the upper part of the heat dissipation belt, and the opening below the second air duct is oriented to correspond to the positions of the plurality of heating blocks.

[0014] Preferably, the second air duct gradually narrows from top to bottom, and a plurality of groups of heat sinks are installed at the opening above the second air duct.

[0015] Compared with the prior art, the advantages of the present invention are: 1. The present invention can not only correct the offset or tilted thermal paper by utilizing the detection of the infrared sensor in the correcting mechanism and the rotation and movement of the two sets of adjusting wheels before printing, but also effectively avoid the continuous sliding friction between the heating block and the thermal paper during the printing process and the influence of the heating block with residual temperature after use by utilizing the reciprocating downward pressure of the pressing wheel of the heat dissipation printing mechanism and the automatic resetting of the heating block, thereby effectively ensuring the printing quality. In addition, by utilizing the heat dissipation belt in the heat dissipation printing mechanism and the arrangement of the two sets of separation wheels and the two sets of lifting wheels, the heat dissipation belt can be used to ensure the normal printing of the downwardly moved heating block while effectively dissipating the remaining heating blocks that have not been moved downward, thereby avoiding the influence of the accumulated heat of the heating block after long-term use on the performance of the heating block, further ensuring the printing quality of the device, and effectively ensuring the printing efficiency.

[0016] 2. The present invention can not only correct the offset or tilted thermal paper through the setting of the correction mechanism, but also can make use of the setting of the arc-shaped slide groove, the cylindrical shaft and the movable plate to enable the adjustment wheel to perform a backward rotation correction along the edge of the thermal paper when correcting the tilted thermal paper. In this way, while completing the correction of the thermal paper, it can also avoid the situation where the printing position is wrong due to the forward movement of the thermal paper during the rotation correction process, thereby effectively ensuring the printing quality.

[0017] 3. The present invention, through the setting of the auxiliary heat dissipation mechanism, can not only utilize the setting of the air inlet, the fan and the first air duct, and cooperate with the rotation of the heat dissipation belt on the transmission assembly in the heat dissipation printing mechanism to allow the outside air to blow on the heat dissipation belt, thereby completing the cooling of the heat dissipation belt, and further effectively ensuring the heat dissipation effect of the heating block, but also can utilize the second air duct and the heat sink on the second air duct and the setting of the gradually narrowing channel therein, so that the cold air (that is, the air entering the second air duct after being cooled by the heat sink) can quickly enter the gap between the heating block and the thermal paper, thereby further ensuring the heat dissipation effect of the heating block, and effectively preventing the thermal paper from becoming thicker due to the heat diffusion after being heated, thereby effectively ensuring the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall structure of a label printing device for a marking machine proposed by the present invention; Figure 2 This is a structural schematic diagram of a base portion of a label printing device for a marking machine proposed by the present invention; Figure 3 This is a structural schematic diagram of a base and a telescopic rod part of a label printing device for a marking machine proposed by the present invention; Figure 4 An exploded view of a control panel of a label printing device for a marking machine proposed by the present invention; Figure 5 This is a schematic structural diagram of the arc-shaped slideway portion of a label printing device for a marking machine proposed by the present invention; Figure 6 This is a schematic structural diagram of a heat dissipation belt portion of a label printing device for a marking machine proposed by the present invention; Figure 7 This is a schematic structural diagram of the electric slide rail portion of a label printing device for a marking machine proposed by the present invention; Figure 8 for Figure 7 The enlarged view of point A in the middle; Fig. 9 This is a schematic structural diagram of a pressing wheel and a heat sink block of a label printing device for a marking machine proposed by the present invention; Fig.10A cross-sectional view of a control center and sleeve rod portion of a label printing device for a marking machine proposed by the present invention; Fig.11 A schematic structural diagram of a fan portion of a label printing device for a marking machine proposed by the present invention; Fig.12 A half-section view of a first air duct and a heat sink portion of a label printing device for a marking machine provided by the present invention.

[0019] In the figure: 1. housing; 11. air inlet; 12. cutting mechanism; 13. paper outlet; 14. base; 141. telescopic rod; 142. platform; 15. paper tube; 16. paper conveying mechanism; 2. control panel; 21. arc chute; 22. cylindrical shaft; 23. movable plate; 24. external plate; 241. connecting ring; 25. servo motor; 251. adjusting wheel; 3. control center; 31. connecting rod; 32. Driving motor; 33, steering shaft; 34, heat dissipation belt; 35, longitudinal slide groove; 4, electric slide rail; 41, moving block; 42, pressing wheel; 43, lifting wheel; 44, separating wheel; 5, heating block; 51, heat dissipation block; 52, folding rod; 53, spring rod; 54, spring; 55, sleeve rod; 56, induction frame; 6, fan; 61, first air duct; 62, heat dissipation plate; 63, second air duct; 64, heat sink. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0021] Reference Figure 1 , Figure 2 as well as Figures 6 to 10 A label printing device for a marking machine includes a base 14, a housing 1 is fixedly provided on the base 14, and a groove is provided on the top of the base 14, a paper outlet 13 is penetrated at one end of the housing 1, and a cutting mechanism 12 is provided at a position near the paper outlet 13 on the top wall of the housing 1. The cutting mechanism 12 is a prior art, and its specific structural design is not repeated here. A paper tube 15 is detachably and rotatably connected to the inside of the housing 1, and a thermal paper is wound on the paper tube 15. A through hole is penetrated at the top of the housing 1, and the position of the through hole is close to the paper outlet 13. The position of the tube 15 corresponds to that of the tube 15, and an opening and closing door is movably installed on the through-opening. A paper feeding mechanism 16 is arranged on the inner top wall of the shell 1, which is used to transmit the thermal paper on the paper tube 15. The paper feeding mechanism 16 is a prior art, and its specific structural design is not repeated here. Two groups of connecting rods 31 are symmetrically installed on the inner top wall of the shell 1, and the shell 1 is fixedly connected to the control center 3 through the two groups of connecting rods 31. The control center 3 is in an inverted L shape, and a plurality of groups of sensing frames 56 are evenly installed on the side of the control center 3 away from the paper feeding mechanism 16.

[0022] Reference Figures 2 to 5 A correction mechanism is provided on the bottom wall of the groove on the base 14 and the inner top wall of the shell 1 for correcting the thermal paper that is offset or tilted. The correction mechanism is located between the paper feeding mechanism 16 and the control center 3, and the correction mechanism includes an L-shaped plate and multiple groups of infrared sensors. The L-shaped plate is fixedly mounted on the inner top wall of the shell 1, and the bottom end of the L-shaped plate is fixedly connected to the control board 2. Two groups of support rods are symmetrically installed at the bottom of the L-shaped plate near the control center 3. The bottom ends of the two groups of support rods are fixedly connected to the control center 3. Multiple groups of infrared sensors are respectively installed at the bottom ends of multiple groups of sensing frames 56. Two groups of arc-shaped slide grooves 21 are symmetrically opened at the bottom end of the control board 2. The two groups of arc-shaped slide grooves 21 are slidably connected with cylindrical shafts 22. The track path of each group of arc-shaped slide grooves 21 is a section of an arc with the axis of the cylindrical shaft 22 in the other group of arc-shaped slide grooves 21 as the center. The two groups of cylindrical shafts 22 are respectively located in the two groups of arc-shaped slide grooves 21. The bottom ends of the two groups of cylindrical shafts 22 are rotatably connected with a movable plate 23, and two groups of external plates 24 are symmetrically installed at the bottom ends of the movable plate 23. Servo motors 25 are installed on the two groups of external plates 24. The output ends of the two groups of servo motors 25 are fixedly connected with rotating rods. Adjusting wheels 251 are fixedly connected through the two groups of rotating rods. The two groups of adjusting wheels 251 are located directly below the two groups of cylindrical shafts 22. The width of the thermal paper is slightly larger than the center distance between the two groups of adjusting wheels 251. Two groups of connecting rings 241 are rotatably connected to the rotating rod. The two groups of connecting rings 241 are located on both sides of the adjusting wheel 251, and connecting blocks are installed on the tops of the two groups of connecting rings 241. The two groups of connecting rings 241 are fixedly connected to the external plates 24 through the two groups of connecting blocks respectively. The setting of the two groups of connecting rings 241 can provide additional support for the rotating rod and the adjusting wheel 251 on the rotating rod, thereby effectively ensuring the stability of the adjusting wheel 251 when rotating.

[0023] Reference Figure 2 and Figure 3 A lifting assembly is provided on the groove on the base 14, which is used to make the thermal paper contact with the adjusting wheel 251. The lifting assembly is located below the two groups of adjusting wheels 251, and the lifting assembly includes four groups of telescopic rods 141, which are evenly installed on the bottom wall of the groove, and the output ends of the four groups of telescopic rods 141 are commonly connected to a platform 142, the top surface of the platform 142 is parallel to the top surface of the base 14 where the groove is not provided, and the side wall of one side of the platform 142 is in contact with the side wall of the groove.

[0024] Reference Figure 2 as well as Figures 6 to 12The shell 1 and the control center 3 are provided with a heat dissipation printing mechanism for heating and printing the thermal paper while realizing heat dissipation of the heated printing part thereon. The heat dissipation printing mechanism includes a transmission component, a reset component and a heat dissipation plate 62. The heat dissipation plate 62 is fixedly mounted on the top wall of the shell 1, and a pressing component is provided at the bottom of the heat dissipation plate 62 for reciprocatingly pressing down each group of heat dissipation blocks 51. The transmission component is arranged on the control center 3, and a heat dissipation belt 34 is wound around the transmission component for rotating the heat dissipation belt 34. The transmission component includes two sets of mounting Blocks, two groups of mounting blocks are symmetrically installed on the top of the control hub 3, one group of mounting blocks is installed with a driving motor 32 at one end facing the heat sink 62, and a group of steering shafts 33 are fixedly connected to the output end of the driving motor 32, and the other group of mounting blocks is rotatably connected with another group of steering shafts 33 at one end facing the heat sink 62, and the control hub 3 is symmetrically rotatably connected with another two groups of steering shafts 33 on one side facing the heat sink 62, and the positions of the two groups of steering shafts 33 at the bottom correspond to the positions of the two groups of steering shafts 33 at the top, and the heat dissipation belts 34 are wound around the four groups of steering shafts 33.

[0025] Before the device starts working, it is necessary to make the thermal paper on the paper roll 15 pass through the gap between the paper conveying mechanism 16 and the platform 142, the gap between the adjusting wheel 251 and the platform 142, the gap between the control center 3 and the base 14, the gap between the pressing assembly and the base 14, and the gap between the cutting mechanism 12 and the base 14 in sequence, until the thermal paper passes through the gap between the cutting mechanism 12 and the paper outlet 13. After that, the thermal paper can be intermittently transferred toward the paper outlet 13 by turning on the paper conveying mechanism 16. Since the bottom of the multiple sets of sensing frames 56 are equipped with infrared sensors, the thermal paper in the housing 1 can be deviated during the transmission process. Or tilt condition is detected. Since the offset and tilt of thermal paper will cause the graphics and text printed thereon to be offset or skewed, it is necessary to correct the thermal paper in real time to improve the printing effect. When the infrared sensor detects that the thermal paper is offset, the telescopic rod 141 on the base 14 controls the platform 142 to move up until the thermal paper at the top of the platform 142 is attached to the bottom of the adjusting wheel 251. At this time, the two sets of servo motors 25 are turned on to control the two sets of adjusting wheels 251 to rotate, and the adjusting wheel 251 attached to the thermal paper can control the horizontal movement of the thermal paper by its own rotation, thereby realizing the correction of the offset thermal paper.

[0026] When the thermal paper is detected to be tilted (at this time, the part of the top side of the base 14 that was originally blocked by the thermal paper will no longer be blocked), the infrared sensor at the bottom of the sensing frame 56 will send an electrical signal to the control board 2 according to the tilt of the thermal paper, so that the control board 2 controls a group of cylindrical shafts 22 on the same side as the unblocked part of the base 14 to slide in the arc-shaped slide groove 21, thereby controlling the corresponding adjustment wheels 251 on the movable plate 23 to move synchronously. Since the two groups of adjustment wheels 251 are located directly below the two groups of cylindrical shafts 22, and the track path of each group of the arc-shaped slide grooves 21 is a section of an arc with the axis of the cylindrical shaft 22 in the other group of arc-shaped slide grooves 21 as the center, the sliding of the cylindrical shaft 22 will be transmitted through the movable plate 23, and finally achieve the movement effect of one group of adjustment wheels 251 rotating along the center point of the other group of adjustment wheels 251, and then the rotation of the thermal paper can be driven by the adjustment wheel 251 to achieve the purpose of correcting the tilt of the thermal paper. In addition Since the width of the thermal paper is slightly larger than the center distance between the two sets of adjusting wheels 251, the rotation of the thermal paper along the center of the adjusting wheel 251 is the rotation of the thermal paper along a point on its edge, and since the position of the cylindrical shaft 22 rotating along the center point of the other set of adjusting wheels 251 is on the same side as the position of the unobstructed part of the base 14, the rotational skew correction process of the thermal paper is to retract the thermal paper along its edge, thereby avoiding the situation where the printing position is incorrect due to the advancement of the thermal paper during the rotational skew correction process. If the thermal paper advances during the skew correction process, the original printing position of the thermal paper will directly pass through the heating block 5, which will cause the printing position to retreat relative to the expectation, that is, the printing position error occurs. If the thermal paper retreats during the skew correction process, it only needs to continue to move the thermal paper toward the heating block 5 through the paper conveying mechanism 16 to allow the thermal paper to return to the correct printing position, thereby effectively avoiding the problem of printing errors of the thermal paper after correction.

[0027] Reference Figures 6 to 10The reset assembly is evenly installed on the bottom surface of the control center 3 located above, and multiple groups of heating blocks 5 are installed at the bottom of the reset assembly. The reset assembly is used to enable the multiple groups of heating blocks 5 to move down individually and reset after moving down. The reset assembly includes multiple groups of sleeve rods 55, which are fixedly installed on the control center 3, and the multiple groups of sleeve rods 55 are sealed and slidably connected with sealing blocks. The bottom ends of the multiple groups of sealing blocks are fixedly connected with spring rods 53. The bottom ends of the multiple groups of spring rods 53 penetrate the corresponding inner bottom walls of the sleeve rods 55 and are fixedly connected with folding rods 52. The number of multiple groups of folding rods 52 is the same as the number of multiple groups of induction frames 56. The outer sleeves of the multiple groups of spring rods 53 are provided with springs 54, and the two ends of the springs 54 are respectively connected to the bottom wall of the sealing block and the inner bottom of the sleeve rod 55 The plurality of sensing frames 56 are fixedly connected to the heat sink 62, and a plurality of longitudinal slots 35 are provided on the control center 3 on one side facing the heat sink 62. The positions of the plurality of longitudinal slots 35 correspond to the positions of the plurality of slots. One end of the plurality of folding rods 52 passes through the plurality of slots and is inserted into the plurality of longitudinal slots 35. The top wall of the portion of the folding rod 52 located in the longitudinal slot 35 contacts the top wall in the longitudinal slot 35. The other ends of the plurality of folding rods 52 are fixedly connected to the plurality of heating blocks 5. The bottom ends of the plurality of heating blocks 5 are installed with a plurality of heating resistors arranged in an array, and the plurality of heating blocks 5 are installed with heat sinks 51. The spacing between two heating blocks 5 located at the edge of the plurality of heating blocks 5 is slightly larger than the width of the thermal paper.

[0028] Reference Figure 2 as well as Figures 6 to 12 The heat dissipation belt 34 is located at the lower part and contacts with the pressing assembly. One end of the plurality of heat dissipation blocks 51 toward the pressing assembly extends outward, one of which is in contact with the pressing assembly, and the other ends of the plurality of heat dissipation blocks 51 extending outward are in contact with the top surface of the lower part of the heat dissipation belt 34. The pressing assembly includes an electric slide rail 4, which is mounted at the bottom end of the heat dissipation plate 62, and a moving block 41 is fixedly connected to the slider on the electric slide rail 4, and a pressing wheel 42, two sets of lifting wheels 43 and two sets of separation wheels are respectively mounted on the moving block 41. Wheel 44, two groups of lifting wheels 43 and two groups of separating wheels 44 are all located below the pressing wheel 42, the two groups of separating wheels 44 are located between the two groups of lifting wheels 43, and the height of the two groups of separating wheels 44 is lower than that of the two groups of lifting wheels 43, the top and bottom surfaces of the lower part of the heat dissipation belt 34 are respectively in contact with the downward outer walls of the two groups of separating wheels 44 and the upward outer walls of the two groups of lifting wheels 43, the top of one group of heat dissipation blocks 51 is in contact with the pressing wheel 42, and the bottom wall of one end of the heat dissipation block 51 extending outward is in contact with the upward outer walls of the two groups of separation wheels 44.

[0029] When the infrared sensor at the bottom of the sensing frame 56 detects that the thermal paper has no offset and no tilt, the device will start the printing operation. At this time, the telescopic rod 141 will control the platform 142 to reset, and the electric slide rail 4 will control the moving block 41 to reciprocate. When the moving block 41 reciprocates, the pressing wheel 42 will roll over the heat sink 51 and press down the heat sink 51 in contact with it, thereby causing the heating block 5 connected to the heat sink 51 to move down in turn until the heating resistor at the bottom of the heating block 5 is attached to the thermal paper. At the same time, the control center 3 sends an electrical signal to the downwardly moving heating block 5, thereby starting the multiple groups of array-arranged heating resistors at the bottom of the heating block 5, so that the heating block 5 prints the content to be printed on the thermal paper in the form of dot matrix heating. When the pressing wheel 42 causes the heat sink 51 in contact with it to move down (that is, the heating resistor on the heat sink 51 in contact with it When the pressing wheel 42 moves and leaves the heat sink 51 previously in contact with it, the spring 54 will be elastically released and the heating block 5 on the heat sink 51 will be lifted and reset, so that the remaining heat sinks 51 not in contact with the pressing wheel 42 and the heating blocks 5 on the heat sink 51 will not be in contact with the thermal paper (i.e., there is a distance between them). Since the spacing between the two groups of heating blocks 5 at the edge of the multiple groups of heating blocks 5 is slightly larger than the width of the thermal paper, after printing a row of images and texts, the pressing wheel 42 will be located on the heat sink 51 at the edge, and the heating block 5 on the heat sink 51 will not be in contact with the thermal paper, so that during the transmission process before the thermal paper prints the next row of images and texts, there will be no friction between the thermal paper and the heating block 5.

[0030] Compared with the printing method in which the print head (equivalent to the heating block 5 in the present device) in a conventional printing device is always in contact with and heated by the surface of the thermal paper, the printing method in which the printing head is moved downward in sequence and heated in the present device can effectively avoid continuous sliding friction between the heating block 5 and the thermal paper during the printing process, thereby effectively avoiding the heating resistor at the bottom of the heating block 5 from being worn due to the friction between the heating block 5 and the thermal paper. In addition, since the remaining heating blocks 5 that have not been moved downward by the pressing wheel 42 are at a distance from the thermal paper, it is possible to effectively avoid the heating block 5 that is reset after use from affecting the thermal paper, that is, to avoid the heating block 5 that has residual temperature after use from heating the thermal paper due to its own heat and causing printing errors.

[0031] The top and bottom surfaces of the heat dissipation belt 34 (the heat dissipation belt 34 is a prior art, which can be flexibly deformed and has good thermal conductivity) located at the lower part are respectively in contact with the downward outer walls of the two sets of separation wheels 44 and the upward outer walls of the two sets of lifting wheels 43 (such as Figure 8As shown), and the ends of the remaining heat sink blocks 51 extending outward are in contact with the top surface of the lower portion of the heat sink belt 34. Therefore, the heat sink block 51 that is not in contact with the pressing wheel 42 will be cooled down by the heat sink belt 34, thereby indirectly cooling the heating block 5 on the heat sink block 51. The heat sink belt 34 and the heat sink block 51 in contact with the pressing wheel 42 will be separated (i.e., not in contact with each other) under the action of the separation wheel 44, thereby effectively avoiding the heat loss of the heating block 5 on the heat sink block 51 due to the heat sink belt 34 during the printing process (i.e., avoiding affecting the normal printing of the heat sink block 51), thereby ensuring normal printing while achieving effective heat dissipation of the heating block 5.

[0032] Reference Figure 1 , Figure 2 , Fig.11 and Fig.12 An auxiliary heat dissipation mechanism is arranged inside the shell 1 for dissipating heat from the heat dissipation belt 34, the heating block 5 and the thermal paper. The auxiliary heat dissipation mechanism comprises a first air duct 61 and a second air duct 63. The first air duct 61 is arranged through the L-shaped plate, and a plurality of fans 6 are installed on the L-shaped plate. The plurality of fans 6 are located at the opening above the first air duct 61, and the opening direction below the first air duct 61 corresponds to the upper part of the heat dissipation belt 34. An air inlet 11 is arranged through the outer top wall of the shell 1, and the position of the air inlet 11 corresponds to the position of the plurality of fans 6. The second air duct 63 is arranged through the heat dissipation plate 62, and the second air duct 63 gradually narrows from top to bottom. The opening direction above the second air duct 63 corresponds to the upper part of the heat dissipation belt 34, and a plurality of heat sinks 64 are installed at the opening above the second air duct 63, and the opening direction below the second air duct 63 corresponds to the position of the plurality of heating blocks 5.

[0033] Since the housing 1 has an air inlet 11, and the position of the air inlet 11 corresponds to the position of the plurality of sets of fans 6, when the fans 6 are turned on, the outside air will enter from the air inlet 11 under the action of the fans 6 and be sent into the first air duct 61 in the L-shaped plate. Since the opening direction below the first air duct 61 corresponds to the upper part of the heat dissipation belt 34, after passing through the first air duct 61, the air will pass through the upper part of the heat dissipation belt 34 and enter the second air duct 63 of the heat dissipation plate 62 (such as Fig.12 As shown in the figure), at this time, the heat of the upper part of the heat dissipation belt 34 will be taken away, so that the upper part of the heat dissipation belt 34 can be cooled. During the printing process, the driving motor 32 will periodically drive the heat dissipation belt 34 to rotate, so that the lower part of the heat dissipation belt 34 that has absorbed heat can be rotated to the upper part and cooled, and at the same time, the cooled part of the heat dissipation belt 34 that is located at the upper part can be rotated to the lower part.

[0034] In addition, since multiple groups of heat sinks 64 are installed at the opening at the top of the second air duct 63, when the air enters the second air duct 63, it will be absorbed by the heat sink 64 and cooled, and will be accelerated in the gradually narrowing channel of the second air duct 63 and blown out from the lower opening. Since there are gaps between the heating block 5 that has not moved downward and the thermal paper, the air blown out of the second air duct 63 will enter these gaps and dissipate the heat of the heating resistor at the bottom of the heating block 5 and the thermal paper at the same time, thereby further ensuring the heat dissipation effect of the heating block 5 while preventing the thermal paper from becoming thicker due to the thermal diffusion after being heated. After the thermal paper prints a row of images and texts, the correction mechanism will continue to detect and correct the thermal paper, and after the processing is completed, continue to print the next row, and repeat this cycle until all the images and texts on the thermal paper are printed. After the printing, the thermal paper will come out from the paper outlet 13 together with part of the air that dissipates the heat to it, and be cut by the cutting mechanism 12.

[0035] In the present invention, before use, the opening and closing door is first opened, and the paper tube 15 with thermal paper wound thereon is loaded into the shell 1, and then the thermal paper on the paper tube 15 is passed through the gap between the paper conveying mechanism 16 and the platform 142, the gap between the adjusting wheel 251 and the platform 142, the gap between the control center 3 and the base 14, the gap between the electric slide rail 4 and the base 14, and the gap between the cutting mechanism 12 and the base 14 in sequence, until the thermal paper passes through the gap between the cutting mechanism 12 and the paper outlet 13, and finally the opening and closing door is closed to complete the preparation work.

[0036] When the device starts working, the paper conveying mechanism 16 will intermittently convey the thermal paper toward the paper outlet 13. Since infrared sensors are installed at the bottom of the multiple groups of sensing frames 56, the deviation or tilt that may occur during the transmission of the thermal paper in the housing 1 can be detected. Since the deviation and tilt of the thermal paper will cause the graphics and text printed thereon to be offset or skewed, it is necessary to correct the thermal paper in real time to improve the printing effect. When the infrared sensor detects that the thermal paper is offset, the telescopic rod 141 on the base 14 controls the platform 142 to move up until the thermal paper at the top of the platform 142 is attached to the bottom of the adjusting wheel 251. At this time, the two groups of servo motors 25 are turned on to control the two groups of adjusting wheels 251 to rotate, and the adjusting wheel 251 attached to the thermal paper can control the horizontal movement of the thermal paper by its own rotation, thereby realizing the correction of the offset thermal paper.

[0037] When the thermal paper is detected to be tilted (at this time, the part of the top side of the base 14 that was originally blocked by the thermal paper will no longer be blocked), the infrared sensor at the bottom of the sensing frame 56 will send an electrical signal to the control board 2 according to the tilt of the thermal paper, so that the control board 2 controls a group of cylindrical shafts 22 on the same side as the unblocked part of the base 14 to slide in the arc-shaped slide groove 21, thereby controlling the corresponding adjustment wheels 251 on the movable plate 23 to move synchronously. Since the two groups of adjustment wheels 251 are located directly below the two groups of cylindrical shafts 22, and the track path of each group of the arc-shaped slide grooves 21 is a section of an arc with the axis of the cylindrical shaft 22 in the other group of arc-shaped slide grooves 21 as the center, the sliding of the cylindrical shaft 22 will be transmitted through the movable plate 23, and finally achieve the movement effect of one group of adjustment wheels 251 rotating along the center point of the other group of adjustment wheels 251, and then the rotation of the thermal paper can be driven by the adjustment wheel 251 to achieve the purpose of correcting the tilt of the thermal paper. In addition, since the thermal paper The width is slightly larger than the center distance between the two groups of adjusting wheels 251. The rotation of the thermal paper along the center of the adjusting wheel 251 is the rotation of the thermal paper along a point on its edge. Since the position of the cylindrical shaft 22 rotating along the center point of the other group of adjusting wheels 251 is on the same side as the position of the unobstructed part of the base 14, the rotation correction process of the thermal paper is to retract the thermal paper along its edge, thereby avoiding the situation where the printing position is incorrect due to the advancement of the thermal paper during the rotation correction process. If the thermal paper advances during the correction process, the original printing position of the thermal paper will directly pass through the heating block 5, which will cause the printing position to retreat relative to the expectation, that is, the printing position error occurs. If the thermal paper retreats during the correction process, it only needs to continue to move the thermal paper toward the heating block 5 through the paper conveying mechanism 16 to return the thermal paper to the correct printing position, thereby effectively avoiding the problem of printing errors of the thermal paper after correction, thereby effectively ensuring the printing quality.

[0038] When the infrared sensor at the bottom of the sensing frame 56 detects that the thermal paper has no offset and no tilt, the device will start the printing operation. At this time, the telescopic rod 141 will control the platform 142 to reset, and the electric slide rail 4 will control the moving block 41 to reciprocate. When the moving block 41 reciprocates, the pressing wheel 42 will roll over the heat sink 51 and press down the heat sink 51 in contact with it, thereby causing the heating block 5 connected to the heat sink 51 to move down in turn until the heating resistor at the bottom of the heating block 5 is attached to the thermal paper. At the same time, the control center 3 sends an electrical signal to the downwardly moving heating block 5, thereby starting the multiple groups of array-arranged heating resistors at the bottom of the heating block 5, so that the heating block 5 prints the content to be printed on the thermal paper in the form of dot matrix heating. When the pressing wheel 42 causes the heat sink 51 in contact with it to move down (that is, the heating resistor on the heat sink 51 in contact with it When the pressing wheel 42 moves and leaves the heat sink 51 previously in contact with it, the spring 54 will be elastically released and the heating block 5 on the heat sink 51 will be lifted and reset, so that the remaining heat sinks 51 not in contact with the pressing wheel 42 and the heating blocks 5 on the heat sink 51 will not be in contact with the thermal paper (i.e., there is a distance between them). Since the spacing between the two groups of heating blocks 5 at the edge of the multiple groups of heating blocks 5 is slightly larger than the width of the thermal paper, after printing a row of images and texts, the pressing wheel 42 will be located on the heat sink 51 at the edge, and the heating block 5 on the heat sink 51 will not be in contact with the thermal paper, so that during the transmission process before the thermal paper prints the next row of images and texts, there will be no friction between the thermal paper and the heating block 5.

[0039] Compared with the printing method in which the print head (equivalent to the heating block 5 in the present device) in a conventional printing device is always in contact with and heated by the surface of the thermal paper, the printing method in which the print head is moved downward in sequence and heated in the present device can effectively avoid continuous sliding friction between the heating block 5 and the thermal paper during the printing process, thereby effectively avoiding the heating resistor at the bottom of the heating block 5 from being worn due to the friction between the heating block 5 and the thermal paper, thereby ensuring the service life of the heating resistor at the bottom of the heating block 5 while effectively ensuring the printing quality. In addition, since the remaining heating blocks 5 that have not been moved downward by the pressing wheel 42 are at a distance from the thermal paper, it is possible to effectively avoid the heating block 5 that is reset after use from affecting the thermal paper, that is, it is possible to avoid the heating block 5 that has residual temperature after use from heating the thermal paper due to its own heat and causing printing errors, thereby further ensuring the printing quality.

[0040] The top and bottom surfaces of the heat dissipation belt 34 (the heat dissipation belt 34 is a prior art, which can be flexibly deformed and has good thermal conductivity) located at the lower part are respectively in contact with the downward outer walls of the two sets of separation wheels 44 and the upward outer walls of the two sets of lifting wheels 43 (such as Figure 8 As shown in the figure, and the ends of the remaining heat sinks 51 extending outward are in contact with the top surface of the lower part of the heat sink belt 34. Therefore, the heat sink 51 that is not in contact with the pressing wheel 42 will be cooled down by the heat sink belt 34, thereby indirectly cooling the heating block 5 on the heat sink 51. The heat sink belt 34 and the heat sink 51 in contact with the pressing wheel 42 will be separated (i.e., they are not in contact with each other) under the action of the separation wheel 44, thereby effectively avoiding the heat loss of the heating block 5 on the heat sink 51 due to the heat sink belt 34 during the printing process (i.e., avoiding affecting the normal printing of the heat sink 51). Further, while ensuring normal printing, effective heat dissipation of the heating block 5 can be achieved, thereby avoiding the heating block 5 from being affected by the accumulated heat after long-term use, thereby effectively ensuring the printing quality and printing efficiency.

[0041] Since the housing 1 has an air inlet 11, and the position of the air inlet 11 corresponds to the position of the plurality of sets of fans 6, when the fans 6 are turned on, the outside air will enter from the air inlet 11 under the action of the fans 6 and be sent into the first air duct 61 in the L-shaped plate. Since the opening direction below the first air duct 61 corresponds to the upper part of the heat dissipation belt 34, after passing through the first air duct 61, the air will pass through the upper part of the heat dissipation belt 34 and enter the second air duct 63 of the heat dissipation plate 62 (such as Fig.12 As shown in the figure), at this time, the heat of the upper part of the heat dissipation belt 34 will be taken away, so that the upper part of the heat dissipation belt 34 can be cooled. During the printing process, the driving motor 32 will periodically drive the heat dissipation belt 34 to rotate, so that the heat-absorbing part of the heat dissipation belt 34 at the bottom can be rotated to the top and cooled, and at the same time, the cooled part of the heat dissipation belt 34 at the top can be rotated to the bottom, thereby effectively ensuring the heat dissipation effect of the heating block 5, and then ensuring the printing quality.

[0042] In addition, since multiple groups of heat sinks 64 are installed at the opening at the top of the second air duct 63, when the air enters the second air duct 63, it will be absorbed by the heat sink 64 and cooled, and will be accelerated in the gradually narrowing channel of the second air duct 63 and blown out from the lower opening. Since there is a gap between the heating block 5 that has not moved downward and the thermal paper, the air blown out of the second air duct 63 will enter these gaps and dissipate the heat of the heating resistor at the bottom of the heating block 5 and the thermal paper at the same time, thereby further ensuring the heat dissipation effect of the heating block 5 while preventing the thermal paper from being heated and causing the lines of the graphics printed thereon to become thicker, thereby effectively ensuring the printing quality. After the thermal paper prints a row of graphics, the correction mechanism will continue to detect and correct the thermal paper, and after the processing is completed, continue to print the next row, and repeat this cycle until all the graphics on the thermal paper are printed. After the printing, the thermal paper will come out from the paper outlet 13 together with part of the air that has dissipated the heat to it, and be cut by the cutting mechanism 12, finally completing the entire process of thermal paper printing.

[0043] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A label printing device for a marking machine, comprising a base (14), a housing (1) fixedly covered on the base (14), a groove being provided at the top of the base (14), a paper outlet (13) being provided through one end of the housing (1), and a cutting mechanism (12) being provided on the inner top wall of the housing (1) near the paper outlet (13), a paper roll (15) being detachably and rotatably connected inside the housing (1), a thermal paper being wound around the paper roll (15), a through opening being provided through the top of the housing (1), the position of the through opening corresponding to the position of the paper roll (15), and an opening and closing door being movably installed on the through opening, a paper conveying mechanism (16) being provided on the inner top wall of the housing (1), characterized in that: Also includes: A control center (3), wherein two groups of connecting rods (31) are symmetrically mounted on the top of the control center (3), and the control center (3) is fixedly connected to the inner top wall of the housing (1) via the two groups of connecting rods (31), the control center (3) is in an inverted L shape, and a plurality of groups of sensing frames (56) are evenly mounted on a side of the control center (3) away from the paper conveying mechanism (16); A deflection correction mechanism, the deflection correction mechanism being arranged on the bottom wall of the groove on the base (14) and the top wall inside the housing (1), and the deflection correction mechanism being located between the paper conveying mechanism (16) and the control center (3), and being used for correcting thermal paper that is deflected or tilted; A heat dissipation printing mechanism, the heat dissipation printing mechanism comprising a transmission component, a reset component and a heat dissipation plate (62), the transmission component being arranged on a control center (3), and a heat dissipation belt (34) being wound around the transmission component, the transmission component being used to enable the heat dissipation belt (34) to rotate, the reset component being evenly mounted on a bottom surface located above the control center (3), and a plurality of groups of heating blocks (5) being mounted at the bottom of the reset component, the reset component being used to enable the plurality of groups of heating blocks (5) to move downward individually and reset after moving downward, the plurality of groups of heating blocks (5) being mounted at the bottom of the plurality of groups of heating blocks (5) being arranged in an array, and two groups of heating resistors located at the edges of the plurality of groups of heating blocks (5) being arranged at the bottom of the plurality of groups of heating blocks The spacing between the groups of heating blocks (5) is slightly larger than the width of the thermal paper. A heat sink (51) is installed on each of the groups of heating blocks (5). The heat sink (62) is fixedly installed on the inner top wall of the housing (1), and a pressing assembly is provided at the bottom end of the heat sink (62) for reciprocatingly pressing down each group of heat sink blocks (51). The heat sink belt (34) is located at the lower part and contacts with the pressing assembly. One end of each of the groups of heat sink blocks (51) facing the pressing assembly extends outward, one group of the heat sink blocks (51) contacts with the pressing assembly, and the other ends of the heat sink blocks (51) extending outward contact with the top surface of the lower part of the heat sink belt (34).

2. A label printing device for a marking machine according to claim 1, characterized in that: The transmission assembly comprises two groups of mounting blocks, the two groups of mounting blocks being symmetrically mounted on the top of the control center (3), one end of one group of mounting blocks facing the heat sink (62) being mounted with a driving motor (32), the output end of the driving motor (32) being fixedly connected with a group of steering shafts (33), the other end of the other group of mounting blocks facing the heat sink (62) being rotatably connected with another group of steering shafts (33), one side of the control center (3) facing the heat sink (62) being symmetrically rotatably connected with another two groups of steering shafts (33), the positions of the two groups of steering shafts (33) located at the bottom being respectively located corresponding to the positions of the two groups of steering shafts (33) located at the top, and the heat dissipation belt (34) being wound around the four groups of steering shafts (33).

3. A label printing device for a marking machine according to claim 2, characterized in that: The reset assembly comprises a plurality of sets of sleeve rods (55), the plurality of sets of sleeve rods (55) are fixedly mounted on the control center (3), and the plurality of sets of sleeve rods (55) are sealed and slidably connected with sealing blocks in the plurality of sets of sleeve rods (55), the bottom ends of the plurality of sets of sealing blocks are fixedly connected with spring rods (53), the bottom ends of the plurality of sets of spring rods (53) penetrate the inner bottom wall of the corresponding sleeve rods (55), and are fixedly connected with folding rods (52), the number of the plurality of sets of folding rods (52) is the same as the number of the plurality of sets of sensing frames (56), and the outer sleeves of the plurality of sets of spring rods (53) are provided with springs (54), and the two ends of the springs (54) are respectively connected with the bottom wall of the sealing block and the sleeve rods. (55) is fixedly connected to the inner bottom wall, and multiple groups of the sensing frames (56) are all penetrated with through openings. The control center (3) is provided with multiple groups of longitudinal slide grooves (35) on the side facing the heat sink (62). The positions of the multiple groups of longitudinal slide grooves (35) respectively correspond to the positions of the multiple groups of through openings. One end of the multiple groups of folding rods (52) respectively passes through the multiple groups of through openings and is inserted into the multiple groups of longitudinal slide grooves (35). The top wall of the part of the folding rod (52) located in the longitudinal slide groove (35) contacts the inner top wall of the longitudinal slide groove (35). The other ends of the multiple groups of folding rods (52) are respectively fixedly connected to the multiple groups of heating blocks (5).

4. A label printing device for a marking machine according to claim 1, characterized in that: The pressing assembly comprises an electric slide rail (4), the electric slide rail (4) being mounted at the bottom end of the heat sink (62), and a moving block (41) being fixedly connected to a slider on the electric slide rail (4), and the moving block (41) being respectively mounted with a pressing wheel (42), two sets of lifting wheels (43) and two sets of separating wheels (44), the two sets of lifting wheels (43) and the two sets of separating wheels (44) being located below the pressing wheel (42), and the two sets of separating wheels (44) being located between the two sets of lifting wheels (43) and the two sets of separating wheels (44). The two sets of separation wheels (44) are located between the two lifting wheels (43), and the height of the two sets of separation wheels (44) is lower than the height of the two sets of lifting wheels (43). The top surface and bottom surface of the lower part of the heat dissipation belt (34) are respectively in contact with the downward outer walls of the two sets of separation wheels (44) and the upward outer walls of the two sets of lifting wheels (43). The top end of one set of heat dissipation blocks (51) is in contact with the pressing wheel (42), and the bottom wall of one end of the heat dissipation block (51) extending outward is in contact with the upward outer walls of the two sets of separation wheels (44).

5. The label printing device for a marking machine according to claim 1, characterized in that: The deviation correction mechanism comprises an L-shaped plate and a plurality of infrared sensors, wherein the L-shaped plate is fixedly mounted on the inner top wall of the housing (1), and the bottom end of the L-shaped plate is fixedly connected to a control panel (2), and two groups of support rods are symmetrically mounted at the bottom end of the L-shaped plate near a control center (3), and the bottom ends of the two groups of support rods are fixedly connected to the control center (3), and the plurality of infrared sensors are respectively mounted at the bottom ends of the plurality of sensing frames (56), and two groups of arc-shaped slide grooves (21) are symmetrically opened at the bottom end of the control panel (2), and cylindrical shafts (22) are slidably connected in the two groups of arc-shaped slide grooves (21), and the track path of each group of arc-shaped slide grooves (21) is centered on the axis of the cylindrical shaft (22) in the other group of arc-shaped slide grooves (21). The two groups of cylindrical shafts (22) are respectively located at the ends of the two groups of arc-shaped slide grooves (21), and the bottom ends of the two groups of cylindrical shafts (22) are connected to a movable plate (23) for rotation together. The bottom ends of the movable plate (23) are symmetrically mounted with two groups of external plates (24). A servo motor (25) is mounted on the two groups of external plates (24). The output ends of the two groups of servo motors (25) are fixedly connected with a rotating rod. The two groups of rotating rods are penetrated and fixedly connected with an adjusting wheel (251). The two groups of adjusting wheels (251) are located directly below the two groups of cylindrical shafts (22). A lifting assembly is arranged on the groove on the base (14) for making the thermal paper contact the adjusting wheel (251).

6. A label printing device for a marking machine according to claim 5, characterized in that: The lifting assembly is located below the two groups of adjustment wheels (251), and the lifting assembly includes four groups of telescopic rods (141), the four groups of telescopic rods (141) are evenly installed on the bottom wall of the groove, and the output ends of the four groups of telescopic rods (141) are commonly connected to a platform (142), the top surface of the platform (142) is parallel to the top surface of the base (14) where no groove is formed, and the side wall of one side of the platform (142) is in contact with the side wall of the groove.

7. A label printing device for a marking machine according to claim 6, characterized in that: Two groups of connecting rings (241) are rotatably connected to the rotating rod. The two groups of connecting rings (241) are located on both sides of the adjusting wheel (251). Connecting blocks are installed on the tops of the two groups of connecting rings (241). The two groups of connecting rings (241) are fixedly connected to the external plate (24) via the two groups of connecting blocks.

8. The label printing device for a marking machine according to claim 5, characterized in that: The width of the thermal paper is slightly larger than the center distance between the two sets of adjustment wheels (251).

9. The label printing device for a marking machine according to claim 1, characterized in that: The invention also comprises an auxiliary heat dissipation mechanism, wherein the auxiliary heat dissipation mechanism comprises a first air duct (61) and a second air duct (63), wherein the first air duct (61) is arranged through an L-shaped plate, and a plurality of sets of fans (6) are installed on the L-shaped plate, and the plurality of sets of fans (6) are located at the opening above the first air duct (61), and the opening below the first air duct (61) is oriented in a direction corresponding to the upper part of the heat dissipation belt (34), and an air inlet (11) is arranged through an outer top wall of the housing (1), and the position of the air inlet (11) corresponds to the position of the plurality of sets of fans (6), and the second air duct (63) is arranged through the heat dissipation plate (62), and the opening above the second air duct (63) is oriented in a direction corresponding to the upper part of the heat dissipation belt (34), and the opening below the second air duct (63) is oriented in a direction corresponding to the position of the plurality of heating blocks (5).

10. A label printing device for a marking machine according to claim 9, characterized in that: The second air duct (63) gradually narrows from top to bottom, and a plurality of groups of heat sinks (64) are installed at the opening above the second air duct (63).

Images