A thermal printing apparatus capable of automatically replacing a paper roll

Abstract

The present application relates to printer technical field, specifically to a kind of automatically replaceable paper roll's thermal printing device, it includes shell, and printing module, storage module and automatic paper feeding module are installed on shell;The printing module includes print head;The storage module includes paper roll channel, one end of paper roll channel is connected with shell, the other end of paper roll channel is connected with automatic paper feeding module, paper roll channel is used to store multiple paper rolls, and make paper roll move to the direction of automatic paper feeding module;The automatic paper feeding module is used to receive the paper roll in storage module, and paper roll is sent to printing module, so that printing module completes printing function using paper roll.The printing device in the present application can store multiple paper rolls, and automatically replace new paper roll after one paper roll is consumed;Reduce the workload of staff to replace paper;By being provided with paper stripping mechanism, the paper head adhered on new paper roll is automatically stripped, so that paper head smoothly enters print head;Angle adjusting mechanism is provided, so that paper roll is placed in paper bin with correct direction, so that paper head is smoothly stripped by paper stripping mechanism.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printers, in particular to a heat-sensitive printing device capable of automatically replacing paper rolls. BACKGROUND

[0002] At present, printers have been widely used in various aspects of life. In particular, some heat-sensitive printing devices have become one of the routine devices in business places such as stations, banks and supermarkets, because of relatively low cost, fast printing speed and good printing effect. In some business process, by setting corresponding printing devices, unattended effect can also be achieved, which not only greatly saves the labor cost of enterprises or institutions, but also reduces the time required by customers for queuing and waiting; greatly improves the efficiency of doing business and service quality.

[0003] Printing paper is an essential consumable for printers to realize its printing function. Once the printing paper in the device is consumed, if it is not replaced or supplemented in time, the printer will not work normally. In particular, the printing devices in some unattended application scenarios, such as self-service cash registers, automatic numbering machines and self-service ticket machines, consume printing paper very quickly. Such printing devices usually use heat-sensitive rolls as consumables, and only one roll can be installed at a time during use, and multiple rolls cannot be installed at the same time. When a roll is used up, it needs to be replaced manually by the staff, and because the paper head of the new roll is usually attached together by glue, the staff needs to manually tear open the paper head when installing the new roll, and then put the paper head into the printing port. With this way of replacing paper, personnel need to be arranged to frequently patrol in order to timely understand the remaining amount of paper in each printing device, and the time interval of the patrol cannot be too long, and frequent patrol greatly increases the workload of the staff; in addition, the paper replacement process needs to rely on manual operation, and the time spent is generally long, and the efficiency needs to be improved.

[0004] Therefore, the present application aims to provide a printing device capable of storing multiple rolls and automatically replacing the rolls, which can configure multiple rolls at a time, and automatically replace the new roll when the current roll is used up, reduce the number of patrols of the printing device by the staff and the patrol frequency, and the paper replacement work can be completely automated by the device, and the efficiency of paper replacement is greatly improved. SUMMARY

[0005] The present application aims to overcome the above-mentioned deficiencies of the prior art and provide a heat-sensitive printing device capable of automatically replacing paper rolls, which can store multiple paper rolls at a time, and automatically replace the new paper roll when the current paper roll is consumed, so that the printing device can work for a long time, and is particularly suitable for use in unattended self-service printing scenarios.

[0006] The technical scheme of the present application is: a heat-sensitive printing device capable of automatically replacing paper rolls, comprising a shell, a printing module, a storage module and an automatic paper feeding module are installed on the shell; the printing module comprises a printing head; the storage module comprises a paper roll channel, one end of the paper roll channel is connected with the shell, the other end of the paper roll channel is connected with the automatic paper feeding module, the paper roll channel is used for storing multiple paper rolls and moving the paper rolls to the direction of the automatic paper feeding module; the automatic paper feeding module is used for receiving the paper rolls in the storage module and sending the paper rolls to the printing module, so that the printing module completes the printing function by using the paper rolls.

[0007] Further, a limiting piece is arranged at the end of the paper roll channel adjacent to the automatic paper feeding module, the limiting piece is used for positioning the paper rolls, and the number of movable paper rolls is limited during each replacement of the paper rolls, i.e., only one paper roll can be moved and sent into the automatic paper feeding module each time.

[0008] Further, the limiting piece is rotationally connected with the paper roll channel, a first limiting part and a second limiting part are arranged on the limiting piece, the first limiting part is closer to the automatic paper feeding module, only one paper roll can be accommodated between the first limiting part and the second limiting part, when the limiting piece rotates by a certain angle, the first limiting part loses the limiting function, so that the paper roll between the first limiting part and the second limiting part is moved into the automatic paper feeding module; at the same time, the second limiting part plays a role to prevent other paper rolls from passing through the position between the first limiting part and the second limiting part.

[0009] Further, a reset mechanism is arranged on the limiting piece, the reset mechanism is used for returning the rotated limiting piece to the initial position. Preferably, the reset mechanism adopts a tension spring, one end of the tension spring is connected with the paper roll channel, the other end of the tension spring is connected with the limiting piece; the tension spring is always in a stretched state, so that the limiting piece needs to receive an external force exceeding a certain threshold to rotate, to prevent the paper roll in the limiting piece from falling under the action of gravity, and the limiting piece can be restored to the initial position in the first time after the action force is eliminated after the limiting piece rotates.

[0010] Further, the cross section of the paper roll channel is adapted to the longitudinal section of the paper roll, so that the width of the channel can just accommodate the paper roll passing through; preferably, a channel door is arranged at the position of the shell connected with the paper roll channel, the channel door blocks the entrance of the paper roll channel on the shell, which has the effect of preventing foreign matters from entering the paper roll channel.

[0011] Further, the automatic paper feeding module comprises a paper bin and a paper stripping mechanism, wherein the paper bin comprises a frame, a bin cover, a paper bin rotating shaft and a paper bin support; the bin cover is installed on the paper bin support, the paper bin support is fixedly connected with the paper bin rotating shaft, and the paper bin rotating shaft is connected with an opening cover motor; the opening cover motor drives the paper bin rotating shaft to rotate, and then the paper bin support drives the bin cover to rotate synchronously; a plurality of contacts are arranged on the paper bin support, including a paper loading contact and a cover closing contact, and the contacts are used in cooperation with sensors to enable the master control board to master the opening angle of the bin cover.

[0012] Further, the paper stripping mechanism is arranged in the paper bin; the paper stripping mechanism is used to strip the paper head adhered on the paper roll, so that the paper head is inserted into the printing head of the printing module.

[0013] Further, the paper stripping mechanism comprises a paper stripping sheet, a paper winding motor and a paper winding roller; the paper winding motor is connected with the paper winding roller; the paper winding roller is in contact with the paper roll; when the paper winding motor drives the paper winding roller to rotate, the paper winding roller drives the paper roll to rotate under the action of friction, so that the paper head of the paper roll is stripped after passing through the paper stripping sheet, and the stripped paper head enters the printing module.

[0014] Further, the automatic paper feeding module further comprises an angle adjusting mechanism, and the angle adjusting mechanism is used to adjust the angle of the paper roll in the paper bin.

[0015] Further, the angle adjusting mechanism comprises an angle adjusting motor, the angle adjusting motor is arranged on the paper bin support and connected with the bin cover, and the angle adjusting motor drives the bin cover to rotate.

[0016] Further, the printing device further comprises a sensor system, and the modules in the printing device work cooperatively with the aid of the sensor system; the sensor system comprises a first sensor arranged in the printing module, a second sensor arranged on the limiting piece, a third sensor and a fourth sensor arranged on the frame; the first sensor is used to judge whether the paper head enters the printing module, the second sensor is used to judge whether the paper roll enters the automatic paper feeding module from the limiting piece, the third sensor cooperates with the plurality of contacts in the paper bin support to judge the opening degree of the bin cover, and the fourth sensor is used to judge whether the bin cover is closed.

[0017] The working process of the printing device in the application is introduced as follows:

[0018] 1. Open the channel door, and send a plurality of thermal paper rolls into the paper roll channel in a specific direction (the specific direction can make the paper head be stripped by the paper stripping mechanism when the paper roll is processed subsequently, and the paper head can be stripped smoothly); the paper roll is automatically moved along the paper roll channel due to gravity, and the first paper roll placed first is supported by the first limiting part on the limiting piece, and the remaining paper rolls are stacked one by one above the first paper roll, so as to realize the storage function of the paper roll.

[0019] 2、 When the printing module detects paper shortage, the main control board sends a command to start the cover opening motor, which drives the paper bin support to rotate around the paper bin rotating shaft as the center axis, so that the bin cover on the paper bin support gradually separates from the frame of the paper bin; until the third sensor senses the paper loading contact on the paper bin support, it sends a signal to the main control board that the bin cover has been opened to a certain angle, and the main control board sends a command to stop the cover opening motor. During the opening of the bin cover, the bin cover will push the limiting member at the end of the paper roll channel, causing the limiting member to rotate outward. The rotation of the limiting member causes the first limiting part on the limiting member to lose its limiting function, while the second limiting part begins to play a role. At this time, the lowest paper roll loses support and falls into the bin cover under the action of gravity, while the other paper rolls are held by the second limiting part.

[0020] 3、 When the second sensor detects that a paper roll has passed, it sends a signal to the main control board, causing the main control board to send a command to reverse the cover opening motor, causing the paper bin support to begin closing with the bin cover. When the third sensor and the fourth sensor both send signals indicating that the bin cover is completely closed, the cover opening motor stops. At the same time that the bin cover is closing, the limiting member is no longer pushed by the bin cover, so under the action of the tension spring it will return to its initial position. At this time, the first limiting part will play its role again, and the second limiting part will lose its limiting function. The paper rolls in the paper roll channel can fall one position at a time, i.e. the position between the first limiting part and the second limiting part can be filled with the second paper roll inserted, waiting for the next replacement.

[0021] 4、 When the paper roll enters the paper bin and the bin cover is completely closed, the main control board sends a command to start the paper winding motor, which drives the paper winding shaft to rotate, in turn driving the paper roll to rotate. After the paper roll rotates, the paper head pasted on the paper roll will interact with the paper ejecting piece. The tapered part of the paper ejecting piece can eject the paper head. When the paper roll continues to rotate, the ejected paper head will extend into the printing module. When the first sensor in the printing module detects that a paper sheet has extended, it can send a signal to the main control board, which sends a command to stop the paper winding motor. At this point, the paper replacement work is complete.

[0022] The above steps can complete the entire paper replacement work of the printing device. However, in actual use, it is inevitable that the user will insert the paper roll in the wrong direction. Therefore, the inventors have optimized and upgraded the printing device by designing an angle adjustment mechanism to solve this problem. The printing device with the angle adjustment mechanism in this application can also include the following steps in the working process:

[0023] 5、 If in the step 4, the first sensor in the printing module does not detect the paper passing after the paper roll motor starts for a period of time, it means that the paper roll is installed reversely, at this time the main control board sends a command to stop the work of the paper roll motor, and also starts the opening cover motor to drive the cover to open until the third sensor senses the paper adjusting contact on the paper roll support and sends a corresponding signal to the main control board, the main control board stops the opening cover motor, and the main control board sends a command to make the angle adjusting motor work to drive the cover and the paper roll inside to rotate 180 degrees. After the paper roll completes the rotation of 180 degrees, the angle adjusting motor stops, the opening cover motor starts to reverse, drives the cover to close, and enters the step 4 again.

[0024] The paper adjusting contact on the paper roll support needs to be detected by the third sensor before the paper loading contact, so that the opening angle of the cover in the step 5 is smaller than the opening angle of the cover in the step 2, avoiding that the cover pushes the limiting piece to fall off from the paper roll channel.

[0025] Compared with the prior art, the present application has the following beneficial effects:

[0026] 1、 The printing device in the present application can store multiple paper rolls, and automatically replace a new paper roll after one paper roll is consumed; after installation, the printing device can work for a longer time, reducing the maintenance workload of the staff;

[0027] 2、 In the printing device in the present application, a paper stripping mechanism is arranged, through which the paper head on the new paper roll can be automatically stripped to make the paper head smoothly enter the printing head, ensuring the effect of paper roll replacement;

[0028] 3、 In the printing device in the present application, an angle adjusting mechanism is arranged, when the direction of the paper roll is incorrect, the paper head of the paper roll cannot be stripped by the stripping piece, at this time the angle adjusting mechanism can be used to rotate the cover together with the paper roll by 180 degrees, so that the paper roll is placed in the paper roll support in the correct direction to be smoothly stripped by the paper stripping mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 is a perspective view of embodiment 1 of the present application;

[0030] Figure 2 is an exploded view of embodiment 1 of the present application;

[0031] Figure 3 is a side view of embodiment 1 of the present application;

[0032] Figure 4 is a cross-sectional view of embodiment 1 of the present application when multiple paper rolls are stored;

[0033] Figure 5This is a schematic diagram of a state during the process of a paper roll entering an automatic paper feeding module from a storage module in Embodiment 1 of the present invention;

[0034] Figure 6 This is a schematic diagram of the paper roll successfully entering the paper bin according to Embodiment 1 of the present invention;

[0035] Figure 7 yes Figure 3 An enlarged schematic diagram of part A in the middle;

[0036] Figure 8 yes Figure 4 Enlarged schematic diagram of part B;

[0037] Figure 9 yes Figure 6 An enlarged schematic diagram of section C;

[0038] Figure 10 This is a three-dimensional schematic diagram of the paper roll in Embodiment 1 of the present invention;

[0039] Figure 11 This is a schematic diagram of the paper tray support structure in Embodiment 2 of the present invention;

[0040] In the diagram: 1-Housing, 11-Channel door, 2-Paper roll channel, 3-Limiting component, 31-Tension spring, 32-First limiting part, 33-Second limiting part, 4-Automatic paper feeding module, 41-Frame, 42-Cover, 43-Paper compartment bracket, 431-Paper loading contact, 432-Cover closing contact, 433-Paper adjusting contact, 44-Paper rejection piece, 45-Cover opening motor, 46-Paper compartment shaft, 47-Paper roll roller, 5-Printing module, 6-Paper roll, 61-Paper head, 71-First sensor, 72-Second sensor, 73-Third sensor, 74-Fourth sensor, 8-Angle adjustment motor. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to specific embodiments. Methods or functional components not specifically described in the embodiments are all prior art.

[0042] Example 1

[0043] like Figures 1-10 As shown, this embodiment is a thermal printing device with automatic paper roll replacement, including a housing 1. A printing module 5, a storage module, and an automatic paper feeding module 4 are mounted on the housing 1. The printing module 5 includes a print head and a main control board. The storage module includes a paper roll channel 2, one end of which is connected to the housing 1, and the other end of which is connected to the automatic paper feeding module 4. The paper roll channel 2 stores multiple paper rolls and moves the paper rolls towards the automatic paper feeding module 4. The automatic paper feeding module 4 receives the paper rolls from the storage module and feeds them to the printing module 5, enabling the printing module 5 to complete the printing function using the paper rolls.

[0044] In this embodiment, the paper roll channel 2 is provided with a limiting piece 3 at one end adjacent to the automatic paper feeding module 4. The limiting piece 3 is used to position the paper roll 6 and limit the number of movable paper rolls 6 during each replacement of the paper roll 6, i.e., only one paper roll 6 can be moved and fed into the automatic paper feeding module 4 each time. The limiting piece 3 is rotatably connected to the paper roll channel 2 by bolts. The limiting piece 3 is provided with a first limiting part 32 and a second limiting part 33. The first limiting part 32 is located closer to the automatic paper feeding module 4, so that the first limiting part 32 supports the lowermost paper roll to prevent the paper roll from falling. Only one paper roll can be accommodated between the first limiting part 32 and the second limiting part 33. When the limiting piece 3 is rotated by a certain angle, the first limiting part 32 loses the limiting function, so that the paper roll 6 between the first limiting part 32 and the second limiting part 33 is moved into the automatic paper feeding module 4. At the same time, the second limiting part 33 also plays a role to prevent other paper rolls 6 above from falling down through the position between the first limiting part 32 and the second limiting part 33.

[0045] In this embodiment, the limiting piece 3 is provided with a reset mechanism. The reset mechanism adopts a tension spring 31. One end of the tension spring 31 is connected to the paper roll channel 2, and the other end of the tension spring 31 is connected to the limiting piece 3. The tension spring 31 is always in a stretched state, so that the limiting piece 3 needs to receive an external force exceeding a certain threshold to rotate, to prevent the paper rolls in the paper roll channel 2 from falling under the action of gravity. Moreover, after the limiting piece 3 is rotated, the limiting piece 3 can return to the initial position in the first time after the external force is eliminated. At this time, the second limiting part 33 loses the limiting function, and the first limiting part 32 plays the role again, i.e., the paper roll immediately above will fall down and be supported by the first limiting part 32. Until the next paper replacement operation.

[0046] In this embodiment, the cross section of the paper roll channel 2 is adapted to the longitudinal section of the paper roll, so that the width of the channel can just accommodate the paper roll passing through. A channel door 11 is provided at the position on the shell 1 connected to the paper roll channel 2. The channel door 11 blocks the entrance of the paper roll channel 2 on the shell 1, which has the effect of preventing foreign matters from entering the paper roll channel 2.

[0047] In this embodiment, the automatic paper feeding module 4 includes a paper bin and a paper stripping mechanism. The paper bin includes a frame 41, a bin cover 42, a paper bin shaft 46 and a paper bin support 43. The bin cover 42 is installed on the paper bin support 43. The paper bin support 43 is fixedly connected to the paper bin shaft 46. The paper bin shaft 46 is connected to an opening cover motor 45. The opening cover motor 45 drives the paper bin shaft 46 to rotate, and in turn drives the paper bin support 43 to rotate synchronously with the bin cover 42. The paper bin support 43 is provided with a plurality of contacts, including a paper loading contact 431 and a cover closing contact 432. These contacts cooperate with sensors to facilitate the master control board to master and control the opening angle of the bin cover 42.

[0048] In the embodiment, a paper stripping mechanism is arranged in the paper bin. The paper stripping mechanism is used to strip the paper head 61 adhered on the paper roll 6, so that the paper head 61 extends into the printing head of the printing module 5. The paper stripping mechanism comprises a paper stripping sheet 44, a paper roll motor and a paper roll roller 47. The paper roll motor is connected with the paper roll roller 47. The paper roll roller 47 is in contact with the paper roll 6. When the paper roll motor drives the paper roll roller 47 to rotate, the paper roll roller 47 drives the paper roll 6 to rotate under the action of friction, so that the paper head 61 of the paper roll 6 is stripped after passing through the paper stripping sheet 44, and the stripped paper head 61 enters the printing module 5.

[0049] In the embodiment, the paper stripping sheet 44 occupies the internal cavity of the paper bin, and only a space for accommodating one paper roll 6 is left. A tapered portion is arranged on the paper stripping sheet 44, and the top end of the tapered portion is in the form of a sheet. When the paper roll rotates in a certain direction, the top end of the tapered portion can be embedded in the paper head 61 to complete the stripping work.

[0050] In the embodiment, the printing device further comprises a sensor system. The sensor system is used to assist the cooperation of the modules in the printer. The sensor system comprises a first sensor 71 arranged in the printing module 5, a second sensor 72 arranged on the limiting member 3, a third sensor 73 and a fourth sensor 74 arranged on the frame 41. The first sensor 71 is used to determine whether the paper head 61 enters the printing module 5. The second sensor 72 is used to determine whether the paper roll enters the automatic paper feeding module 4 from the limiting member 3. The third sensor 73 cooperates with a plurality of contacts in the paper bin support 43 to determine the opening degree of the bin cover 42. The fourth sensor 74 is used to determine whether the bin cover 42 is closed.

[0051] The working process of the printing device in the embodiment comprises the following four steps:

[0052] 1. Open the passage door 11, and send a plurality of heat-sensitive paper rolls (without core) into the paper roll passage 2 in a specific direction (the specific direction can make the paper roll 6 be stripped by the paper stripping mechanism later, and the paper head 61 can be stripped smoothly). The paper rolls are automatically moved along the paper roll passage 2 due to gravity. The first paper roll placed first is supported by the first limiting portion 32 on the limiting member 3. The remaining paper rolls are stacked one by one above the first paper roll to realize the storage function of the paper rolls.

[0053] 2、 When the printing module 5 detects paper shortage, the main control board sends a command to start the cover opening motor 45, which drives the paper bin support 43 to rotate around the paper bin rotating shaft 46, so that the bin cover 42 on the paper bin support 43 gradually separates from the frame 41 of the paper bin; until the third sensor 73 senses the paper loading contact 431 on the paper bin support 43, a signal representing that the bin cover 42 has been opened to a set angle is sent to the main control board, and the main control board sends a command to stop the cover opening motor 45. During the opening of the bin cover 42, the bin cover 42 will push the limiting member 3 at the end of the paper roll channel 2, causing the limiting member 3 to rotate outward. The rotation of the limiting member 3 causes the first limiting part 32 on the limiting member 3 to lose its limiting function, while the second limiting part 33 begins to function. At this time, the lowermost paper roll loses support and falls into the bin cover 42 under the action of gravity, and the other paper rolls 6 are held by the second limiting part 33.

[0054] 3、 When the second sensor 72 detects that a paper roll has passed, it sends a signal to the main control board, causing the main control board to send a command to the cover opening motor 45 to reverse, causing the paper bin support 43 to begin to close with the bin cover 42. Until the third sensor 73 and the fourth sensor 74 both send signals representing that the bin cover 42 is completely closed, the cover opening motor 45 stops. At the same time that the bin cover 42 is closing, the limiting member 3 is no longer pushed by the bin cover 42, so under the action of the tension spring 31, the limiting member 3 will return to its initial position. At this time, the first limiting part will function again, and then the second limiting part 33 loses its limiting function. The paper rolls in the paper roll channel 2 can fall one position at a time, i.e., the position between the first limiting part 32 and the second limiting part 33 can be filled by the second paper roll placed, waiting for the next replacement.

[0055] 4、 When the paper roll enters the paper bin and the bin cover 42 is completely closed, the main control board sends a command to start the paper winding motor, which drives the paper winding shaft 47 to rotate, and in turn drives the paper roll 6 to rotate. After the paper roll 6 rotates, the paper head 61 pasted on the paper roll 6 will interact with the paper ejecting piece 44. The tapered part of the paper ejecting piece 44 can eject the paper head 61. When the paper roll 6 continues to rotate, the ejected paper head 61 will extend into the printing module 5. When the first sensor 71 in the printing module 5 detects that a paper sheet has extended, it can send a signal to the main control board, and the main control board sends a command to stop the paper winding motor. The printing module 5 can then normally perform the printing task. At this point, the paper replacement work of the printing device in this embodiment is completed.

[0056] Embodiment 2

[0057] As Figures 1-11The difference between the present embodiment and embodiment 1 is that in the present embodiment, the automatic paper loading module 4 further comprises an angle adjusting mechanism for adjusting the angle of the paper roll in the paper bin. The angle adjusting mechanism comprises an angle adjusting motor 8 arranged on the paper bin support 43 and connected in transmission with the bin cover 42, and the angle adjusting motor 8 can drive the bin cover 42 to rotate. In the present embodiment, the contacts on the paper bin support 43 comprise a paper loading contact 431, a paper adjusting contact 433 and a cover closing contact 432, and the paper adjusting contact 433 on the paper bin support 43 is detected by the third sensor 73 before the paper loading contact 431, so that the opening angle of the bin cover 42 during the operation of the angle adjusting mechanism is smaller than the opening angle of the bin cover 42 in step 2, avoiding that the bin cover 42 pushes open the limiting member 3 and causes another paper roll to fall from the paper roll channel 2.

[0058] The working process of the printing device in the present embodiment further comprises a step 5 in addition to the previous 4 steps: if in step 4 the first sensor 71 in the printing module 5 does not detect any paper passing after the paper roll motor is started for a period of time (which can be pre-set), it means that the paper roll is installed in reverse, and the main control board sends a command to stop the operation of the paper roll motor, and simultaneously starts the opening motor 45 again to drive the bin cover 42 to open until the third sensor 73 senses the paper adjusting contact 432 on the paper bin support 43 and sends a corresponding signal to the main control board, the main control board stops the opening motor 45, and the main control board also sends a command to make the angle adjusting motor 8 work to drive the bin cover 42 and the paper roll 6 inside to rotate 180 degrees. After the paper roll completes the rotation of 180 degrees, the angle adjusting motor 8 stops, the opening motor 45 starts to reverse, drives the bin cover 42 to close, and enters step 4 again.

[0059] Embodiment 3

[0060] The printing device in the present embodiment is improved on the basis of embodiment 1, and specifically, a through slot is arranged on the bin cover 42, and the size of the through slot is larger than the size of the paper core of the paper roll with core, so that after the paper roll with core is used up, the remaining paper core can naturally fall out of the through slot. Of course, a special paper core removing mechanism can also be added in the paper bin for automatically removing the paper core from the paper bin after the paper roll with core is used up, for example, a blowing port can be added in the paper bin structure, and the blowing port can be connected with a high-pressure gas source, and when the bin cover is opened, the paper core can be blown out of the paper bin through the blowing of the gas flow. The advantage of the present embodiment is that it has higher universality and can be used for both paper rolls with core and paper rolls without core. Those skilled in the art can clearly understand the technical solutions in the present embodiment through the written description, and therefore the drawings are not provided.

[0061] Embodiment 4

[0062] The printing device in the embodiment is different from that in the embodiment 1 in that in the embodiment, a gluing device is further arranged at the paper outlet end of the printing module, the gluing device comprises a plurality of groups of gluing rollers and a paint box, the paint box is provided with paint, the surface of the gluing roller is provided with a sponge layer, the surface of the gluing roller can be immersed in the paint box, so that the surface of the gluing roller is covered with paint, and after the printed paper is discharged from the paper outlet end of the printing module, the printed paper is fully contacted with the surface of the gluing roller through the plurality of groups of gluing rollers, and a transparent coating is formed on the paper, and the embodiment has the advantage that a layer of paint can be applied on the surface of the thermal paper (especially the content surface) after printing, so that the storage time of the printed content is prolonged.

[0063] The paint used in the embodiment can be a common waterproof paint for thermal paper, because some thermal paper usually has strong water absorption, and is easy to absorb water during processing, application and transportation, and after absorbing water, the information printed on the thermal paper is easy to become blurred, therefore, after printing, the embodiment can effectively prolong the storage time of the thermal paper by applying a layer of waterproof material on the paper. The technical solution in the embodiment can be clearly understood by those skilled in the art through the description, and therefore, the drawings are not provided.

[0064] The above is only some embodiments of the application, and is not used to limit the application, and those skilled in the art can combine and modify the various technical features of the application, and those skilled in the art can improve, modify, replace the application, or use the structure or method of the application in other fields to obtain the same effect, without departing from the spirit and scope of the application, and all of the above belong to the protection scope of the application.

Claims

1. A thermal printer capable of automatically replacing a paper roll, comprising a housing and a printing module, characterized in that: Also include a storage module and an automatic paper feeding module; The storage module includes a paper roll channel, one end of the paper roll channel is connected with the shell, the other end of the paper roll channel is connected with the automatic paper feeding module, the paper roll channel is used for storing a plurality of paper rolls and moving the paper rolls to the direction of the automatic paper feeding module; The automatic paper feeding module is used for receiving the paper rolls in the storage module and sending the paper rolls to the printing module, so that the printing module completes the printing function by using the paper rolls; The end of the paper roll channel adjacent to the automatic paper feeding module is provided with a limiting piece, the limiting piece is used for positioning the paper rolls, and the number of movable paper rolls is limited during each replacement of the paper rolls, so that only one paper roll is sent into the automatic paper feeding module; The limiting piece is rotationally connected with the paper roll channel, the first limiting part and the second limiting part are provided on the limiting piece, the first limiting part is closer to the automatic paper feeding module, only one paper roll can be accommodated between the first limiting part and the second limiting part; after the limiting piece rotates by a certain angle, the first limiting part loses the limiting function, so that the paper roll between the first limiting part and the second limiting part moves into the automatic paper feeding module; at the same time, the second limiting part plays a role to prevent other paper rolls from passing through the position between the first limiting part and the second limiting part; The automatic paper feeding module includes a paper bin and a paper stripping mechanism, wherein the paper bin includes a frame, a bin cover, a paper bin shaft and a paper bin support; the bin cover is installed on the paper bin support, the paper bin support is connected with the paper bin shaft, and the paper bin shaft is connected with an opening cover motor; the paper stripping mechanism is arranged in the paper bin; the paper stripping mechanism is used for stripping the paper head pasted on the paper roll; The paper stripping mechanism includes a paper stripping piece, a paper winding motor and a paper winding shaft; the paper winding motor is connected with the paper winding shaft; the paper winding shaft is in contact with the paper roll; when the paper winding motor drives the paper winding shaft to rotate, the paper winding shaft drives the paper roll to rotate under the action of friction, so that the paper head of the paper roll is stripped after passing through the paper stripping piece, and the stripped paper head enters the printing module.

2. The automatically replaceable paper roll thermal printing device according to claim 1, characterized by: A reset mechanism is provided on the limiting piece, and the reset mechanism is used for returning the rotated limiting piece to the initial position.

3. The automatically replaceable paper roll thermal printing device according to claim 1, characterized by: The cross section of the paper roll channel is adapted to the longitudinal section of the paper roll, and a channel door is provided at the position of the shell connected with the paper roll channel.

4. The automatically replaceable paper roll thermal printing device according to claim 1, characterized by: The automatic paper feeding module further includes an angle adjusting mechanism, and the angle adjusting mechanism is used for adjusting the angle of the paper roll in the paper bin.

5. The automatically replaceable paper roll thermal printing device according to claim 4, characterized by: The angle adjusting mechanism includes an angle adjusting motor, the angle adjusting motor is arranged on the paper bin support and connected with the bin cover, and the angle adjusting motor drives the bin cover to rotate.

6. The paper roll replaceable thermal printer according to any one of claims 1 to 5, wherein A sensor system is further included, and the modules in the printer work cooperatively with the aid of the sensor system; the sensor system includes a first sensor arranged in the printing module, a second sensor arranged on the limiting piece, a third sensor and a fourth sensor arranged on the frame; the first sensor is used for judging whether the paper head enters the printing module, the second sensor is used for judging whether the paper roll enters the automatic paper feeding module from the limiting piece, the third sensor is used for judging the opening degree of the bin cover, and the fourth sensor is used for judging whether the bin cover is closed.

Images