Thermal printer capable of solving cutter clamping problem by using flip cover to press cutter

Abstract

The thermal printer comprises a base, a cover body, a rubber roller and a thermosensitive piece, a movable cutter driving device drives a movable cutter to move towards a fixed cutter, the turning cover is provided with a first hinge part, a trigger part, an operation part and a driving part, and the operation part and the driving part are located at the two ends of the first hinge part respectively. The turning cover is hinged to the cover body through the first hinge part, the operation part drives the driving part to rotate, the driving part is adjacent to the fixed cutter, rotation of the driving part drives the fixed cutter to move away from the movable cutter, and rotation of the operation part drives the trigger part to be separated from or adjacent to the trigger module. According to the scheme, the trigger part and the driving part are integrated through the flip cover, so that a user only needs to rotate the operation part to simultaneously drive the fixed cutter to be far away from the movable cutter and enable the trigger part to be separated from or adjacent to the trigger module when the cutter is clamped, thereby triggering the movable cutter to retract, smoothly solving the problem of cutter clamping, and quickly solving the problem of cutter clamping without dismounting the printer; and the reliability and the maintenance convenience of the equipment are improved.

Description

Technical Field

[0001] This invention relates to the field of thermal printing equipment, and more particularly to a thermal printer that utilizes a flip-top pressure blade to solve the problem of blade jamming. Background Technology

[0002] With the widespread application of thermal printing technology, it has been widely used in the warehousing and logistics industry as well as in the printing of receipts and in other fields. Thermal printers include thermal transfer printers that use the principle of thermal transfer with a ribbon, and thermal printers that use thermal paper for thermal imaging. After thermal printing, the printed paper is output for users. Thermal printers are widely used in the printing of receipts and labels in retail, logistics, medical and financial fields because of their fast printing speed, low noise and durable printhead.

[0003] Thermal printers are typically equipped with a cutting device to automatically cut paper. This device consists of a moving blade and a fixed blade. The moving blade is driven by a drive unit and moves toward the fixed blade to cut the paper. However, in actual use, due to paper accumulation, blade sticking, alignment misalignment, or drive malfunction, the moving blade and fixed blade are prone to jamming, a phenomenon known as blade jamming. This prevents the moving blade from returning to its original position, affecting subsequent printing and even damaging components.

[0004] Traditional methods for resolving blade jamming often require disassembling the printer casing or manually prying the blade with tools, which is cumbersome and carries the risk of damage. While some existing technologies attempt to separate the blade using manual levers or reset buttons, these are often complex, space-consuming, or lack integrated blade retraction triggering functionality, requiring additional system recovery operations even after the jamming is resolved. Therefore, there is a need for a compact, easy-to-operate thermal printer solution that can resolve blade jamming and trigger blade retraction in one integrated manner. Summary of the Invention

[0005] The purpose of this invention is to provide a thermal printer that uses a flip-top pressure blade to solve the problem of blade jamming.

[0006] To achieve the objective of this invention, a thermal printer using a flip-top pressure cutter to solve the problem of blade jamming is provided. The printer includes a base, a cover, a rubber roller, and a thermal sheet. One of the rubber roller and the thermal sheet is disposed on the base, and the other is disposed on the cover. The cover is located above and connected to the base, forming a paper output port between the cover and the base. The thermal sheet and the rubber roller face each other and form a paper feeding channel, which communicates with the paper output port. The thermal printer also includes a cutter device, a flip-top, and a trigger module. The cutter device includes a moving blade, a moving blade drive device, a fixed blade, and a fixed blade elastic element. The trigger module, the moving blade, and the moving blade drive device are disposed on... On the base, a fixed blade, a fixed blade elastic element, and a flip cover are mounted on the cover body. A moving blade drive device drives the moving blade to move toward the fixed blade along the paper cutting direction. The fixed blade elastic element is connected between the fixed blade and the cover body, and applies an elastic holding force to the fixed blade along the holding direction toward the moving blade. The flip cover is provided with a first hinge part, a trigger part, an operating part, and a drive part. The operating part and the drive part are located at both ends of the first hinge part. The flip cover is hinged to the cover body through the first hinge part. The operating part drives the drive part to rotate. The drive part is adjacent to the fixed blade. The rotation of the drive part drives the fixed blade to move away from the moving blade. The rotation of the operating part drives the trigger part to separate from or be adjacent to the trigger module.

[0007] As can be seen from the above, this design integrates the trigger and drive units through a flip cover, allowing users to simply rotate the operating unit when the blade is stuck. This simultaneously drives the fixed blade away from the moving blade and separates or connects the trigger unit with the trigger module, thereby triggering the moving blade to retract and successfully resolving the blade jamming problem. This integrated design simplifies the operation steps, allows for quick resolution of blade jamming issues without disassembling the printer, and improves the reliability and ease of maintenance of the equipment.

[0008] A further solution is to provide a rotating groove on the surface of the cover, with a second hinge at both ends of the rotating groove in the paper width direction, and the first hinge and the second hinge are hinged together, so that the flip cover can be rotatably installed in the rotating groove.

[0009] As can be seen above, the rotating groove and the second hinge provide stable and precise hinge support for the flip cover, ensuring that the flip cover rotates smoothly and does not deviate. At the same time, the rotating groove is integrated into the surface of the cover, making the structure compact, saving space, and facilitating the installation and positioning of the flip cover.

[0010] A further improvement is that the cover has a paper output baffle on the side of the rotating groove near the paper output port, the paper output baffle is located above the fixed knife, and a drive through hole is provided through the bottom wall of the rotating groove, the drive through hole is close to the paper output baffle, and the drive unit passes through the drive through hole and is adjacent to the fixed knife.

[0011] As can be seen from the above, the paper output baffle can guide the paper output, prevent the paper from interfering with the fixed blade, and protect the fixed blade from external contamination. The drive through hole provides a channel for the drive unit to directly contact the fixed blade, so that the drive unit can effectively push the fixed blade to move when the flip cover rotates, reducing the number of transmission parts and improving the response efficiency.

[0012] A further solution is that the cover has opening protrusions at both ends of the paper output baffle along the paper width direction, and the base has width edges at both ends of the paper output outlet along the paper width direction. The opening protrusions are adjacent to the width edges, and the rotation of the operating unit drives the opening protrusions to separate from the width edges.

[0013] As can be seen above, when the operating part rotates, the opening protrusion is adjacent to the width edge. With further flipping of the cover, the hinge moves away from the base, and then the opening protrusion separates from the width edge. This allows the user to open the cover for maintenance or paper cleaning while solving the problem of the stuck knife, enhancing the continuity and convenience of operation.

[0014] A further proposed solution is to have a trigger through hole through the bottom wall of the rotating slot, with the trigger part arranged in a columnar shape, passing through the trigger through hole to cooperate with the trigger module.

[0015] As can be seen above, the trigger through hole provides a precise guide channel for the columnar trigger part, ensuring that the matching position of the trigger part and the trigger module is accurate. When the flip cover rotates, the trigger part can quickly separate from or contact the trigger module, thereby reliably triggering the retraction signal and avoiding malfunctions or poor contact.

[0016] A further embodiment is that the cutting device includes a fixed blade bracket connected to the cover. The fixed blade bracket has a bottom surface and two fixed blade mounting sidewalls. The two fixed blade mounting sidewalls are connected to both ends of the bottom surface of the bracket in the paper width direction. A fixed blade mounting groove is formed between the bottom surface of the bracket and the two fixed blade mounting sidewalls. The fixed blade mounting sidewalls are provided with limit grooves. The fixed blade is provided with limit protrusions at both ends in the paper width direction. The limit protrusions are located in the limit grooves and can move within the limit grooves.

[0017] As can be seen from the above, the fixed blade bracket provides a stable installation and sliding guide structure for the fixed blade through the fixed blade mounting groove and the limiting slide groove. The cooperation between the limiting protrusion and the limiting slide groove restricts the fixed blade to move only in the pressing direction, which not only improves the tight cooperation between the moving blade and the fixed blade, but also prevents the fixed blade from deflecting when cutting paper or retracting the blade, thus ensuring cutting accuracy and reliability.

[0018] A further proposed solution is to have a back edge on the back side of the blade of the fixed blade, and a fixed blade mounting rear wall on the bottom surface of the bracket near the back edge of the fixed blade mounting groove. The fixed blade mounting rear wall has a positioning groove, and a positioning block is provided on the back edge of the blade, with the positioning block and the positioning groove having a clearance fit.

[0019] As can be seen from the above, the clearance fit between the positioning block and the positioning groove provides initial installation positioning for the fixed blade, ensuring that the fixed blade and the moving blade cooperate with each other, improving the stable support on the rear side, and allowing the fixed blade to move to a certain extent under elastic pressure to separate the fixed blade from the moving blade. It also adapts to changes in paper thickness or blade wear, reduces the risk of blade jamming, and facilitates assembly and replacement.

[0020] A further proposed solution is that the thermal printer includes a roller bracket with a roller mounting groove extending along the paper width direction. The roller is rotatably mounted in the roller mounting groove. The roller bracket has a supporting top surface above the roller mounting groove, and the bottom surface of the bracket is mounted on the supporting top surface. The supporting top surface is fixedly connected to the cover.

[0021] As can be seen above, the rubber roller bracket integrates the functions of rubber roller installation and fixed blade bracket support. The top support provides a stable mounting base for the fixed blade bracket, improving the overall structural rigidity. This modular design simplifies the assembly process and ensures the relative positional accuracy between the paper feed path and the cutting device, thus guaranteeing printing and paper cutting quality.

[0022] A further proposed solution is to use a spring as the elastic element for the fixed blade, with a spring through groove provided through the bottom surface of the bracket. The spring is located in the fixed blade mounting groove and passes through the spring through groove, and the spring elastically abuts against the fixed blade and the top surface of the support.

[0023] As can be seen above, the spring is installed between the fixed blade and the support top surface through the spring groove, providing a uniform and adjustable elastic holding force to ensure that the fixed blade always presses against the moving blade, and the pressure is stable when cutting paper; when the flip cover drives the fixed blade to move, the spring can be compressed, allowing the fixed blade to move away from the moving blade flexibly, and it can automatically reset after retraction, which enhances the durability and adaptability of the system.

[0024] A further proposed solution is to have a front baffle on the bottom surface of the fixed blade support near the cutting edge of the fixed blade, and a spring groove on the top surface of the support. The spring groove has an inlet near the cutting edge, and the spring can be installed into the spring groove through the inlet. The front baffle covers the inlet.

[0025] As can be seen from the above, the design of the front baffle and the loading port makes the installation and replacement of the spring more convenient, without the need to completely disassemble the fixed tool bracket; after assembly, the front baffle closes the loading port to prevent the spring from falling out or shifting during operation, ensuring the stability of the spring during long-term operation, reducing maintenance costs, and also facilitating the support and positioning of the fixed tool bracket. Attached Figure Description

[0026] Figure 1 This is a structural diagram of an embodiment of the thermal printer of the present invention.

[0027] Figure 2 This is a structural diagram of the thermal printer embodiment of the present invention with the cover opened.

[0028] Figure 3 This is a structural diagram of an embodiment of the thermal printer of the present invention from another perspective with the cover open.

[0029] Figure 4 This is a structural diagram of the cover in an embodiment of the thermal printer of the present invention.

[0030] Figure 5 This is an exploded view of the cover in an embodiment of the thermal printer of the present invention.

[0031] Figure 6 This is an exploded view of the cover body in an embodiment of the thermal printer of the present invention from another perspective.

[0032] Figure 7 This is a cross-sectional view of the thermal printer embodiment of the present invention located at the drive section in the normal standby state.

[0033] Figure 8 This is a cross-sectional view of the thermal printer embodiment of the present invention located at the trigger section in the normal standby state.

[0034] Figure 9 This is a cross-sectional view of the thermal printer embodiment of the present invention located at the drive section in the die-locking state.

[0035] Figure 10 This is a cross-sectional view of the thermal printer embodiment of the present invention located at the drive section in the cutter-separated state.

[0036] Figure 11 This is a cross-sectional view of the thermal printer embodiment of the present invention located at the trigger section in the cutter separation state.

[0037] Figure 12 This is a cross-sectional view of the thermal printer embodiment of the present invention located at the drive section in the retracted state.

[0038] Figure 13 This is a side view of an embodiment of the thermal printer of the present invention in the cutter-separated state.

[0039] The present invention will be further described below with reference to the accompanying drawings and embodiments. Detailed Implementation

[0040] Reference Figures 1 to 7 The thermal printer includes a base 1, a cover 2, a rubber roller 21, a rubber roller support 22, and a thermal sheet 13. The rubber roller 21 is mounted on the base 1 and the cover 2. The base 1 has a paper tray 11. The cover 2 is located above the base 1 and is connected to the base 1 via a hinge arm 21. A paper outlet 10 is formed between the cover 2 and the base 1. The thermal sheet 13 and the rubber roller 21 are opposite each other and form a paper feeding channel, which connects the paper tray 11 and the paper outlet 10.

[0041] The thermal printer also includes a cutting device, a flip cover 3, and a trigger module 12. The cutting device includes a moving blade 41, a moving blade drive device 45, a fixed blade 42, a fixed blade support 43, and a fixed blade elastic element 44. The trigger module 12, the moving blade 41, and the moving blade drive device 45 are mounted on the base 1. The fixed blade 42 is located at the paper output port 10 and above the thermal sheet 13. The moving blade drive device 45 can be a rotary motor, which is connected to a rotating wheel via a connecting worm gear. The rotating wheel has a protrusion, which drives the protrusion to rotate around the rotating wheel. The fixed blade 42 has a matching groove, which engages with the protrusion. The fixed blade 42 also has a slider, and the base has a paper cutting groove along the paper cutting direction. The slider engages with the paper cutting groove. The rotation of the moving blade drive device 45 drives the fixed blade 42 to move along the paper cutting direction X towards the fixed blade 42.

[0042] The fixed blade 42, fixed blade bracket 43, fixed blade elastic element 44, and flip cover 3 are disposed on the cover body 2. Specifically, the fixed blade bracket 43 is provided with a bracket bottom surface 431, a fixed blade mounting rear wall 434, a front baffle 436, and two fixed blade mounting side walls 432. The two fixed blade mounting side walls 432 are connected to both ends of the bracket bottom surface 431 based on the paper width direction Y. The fixed blade mounting rear wall 434 is located on the side of the bracket bottom surface 431 near the blade back 423. The bracket bottom surface 431, the fixed blade mounting rear wall 434, and the two fixed blade mounting side walls 432 form a fixed blade mounting groove 430. Each fixed blade... The mounting sidewall 432 is provided with a limiting groove 433. The limiting groove 433 extends along the pressing direction Z and is arranged in a closed groove. That is, the limiting groove 433 has a limiting stop wall at the top. Each fixed knife mounting sidewall 432 has a guide slope above the limiting groove 433 based on the pressing direction Z. The fixed knife 42 is provided with limiting protrusions 422 at both ends in the paper width direction Y. When the fixed knife 42 is installed into the fixed knife mounting slot 430, the limiting protrusions 422 first slide and cooperate with the guide slope, and then the limiting protrusions 422 are located in the limiting groove 433 and can move up and down in the limiting groove 433.

[0043] The fixed blade 42 has a blade edge 421 on the side facing the moving blade 41. The back side of the blade edge 421 of the fixed blade 42 has a blade back 423. The fixed blade mounting rear wall 434 has two positioning grooves 435, which are located on both sides in the paper width direction. The blade back 423 has two positioning blocks 424, and one positioning block 424 is clearance-fitted with the positioning groove 435.

[0044] The front baffle 436 is located near the blade 421 of the fixed blade 42. The front baffle 436 is vertically connected to the bottom surface 431 of the bracket and extends downward. The bottom surface 431 of the bracket is provided with multiple spring through slots 437. The multiple spring through slots 437 are arranged along the paper width direction. The bottom surface 431 of the bracket and the front baffle 436 surround the spring through slots 437.

[0045] The roller bracket 22 is provided with a roller mounting groove 223 extending along the paper width direction Y. The roller 21 is rotatably mounted in the roller mounting groove 223. The roller bracket 22 is provided with a support top surface 222 above the roller mounting groove 223. The support top surface 222 extends along the paper width direction Y. The support top surface 222 is provided with multiple spring grooves 225. The multiple spring grooves 225 are arranged along the paper width direction Y. The spring grooves 225 are provided with an inlet near the blade part 421. The fixed blade elastic element 44 is a spring. The spring can be installed into the spring groove 225 from the inlet. The bottom surface 431 of the bracket is mounted on the support top surface 222. The support top surface 222 is fixedly connected to the cover 2, thereby realizing the fixed connection between the fixed blade bracket 43 and the cover 2.

[0046] At this time, the spring is located in the fixed blade mounting groove 430 and passes through the spring through groove 437. The spring elastically abuts against the fixed blade 42 and the support top surface 222, so that the fixed blade elastic element 44 can apply an elastic holding force to the fixed blade 42 in the holding direction Z toward the moving blade 41. In addition, the front baffle 436 covers the inlet and is adjacent to the front side wall of the rubber roller bracket 22. The rubber roller bracket 22 is provided with a paper guide surface 221 below the rubber roller 21.

[0047] The flip cover 3 is provided with two first hinge parts 34, a trigger part 33, an operating part 31, and a driving part 32. The operating part 31 may be the rear edge of the flip cover 3 away from the paper outlet 10. The driving part 32 is a protruding post extending toward the paper outlet 10 and is located in the middle of the flip cover 3. The two first hinge parts 34 are located at both ends in the paper width direction Y and are arranged as hinge holes. A mating slope is provided on the lower side of the hinge hole. In the projection along the paper width direction Y, the projection positions of the operating part 31 and the driving part 32 are respectively located at both ends of the projection positions of the first hinge parts 34 based on the paper cutting direction X.

[0048] A rotating groove 22 is provided on the upper surface of the cover 2. A second hinge portion 223 is provided at both ends of the rotating groove 22 in the paper width direction Y. The second hinge portion 223 is arranged as a hinge post. The upper part of the hinge post has a mating slope. When the flip cover 3 is installed in the rotating groove 22, the first hinge portion 34 is hinged to the second hinge portion 223 through the sliding fit between the mating slope of the hinge hole and the mating slope of the hinge post. The flip cover 3 is hinged to the cover 2 through the first hinge portion 34. The flip cover 3 is rotatably installed in the rotating groove 22.

[0049] The cover 2 has a paper output baffle 23 on the side of the rotating groove 22 near the paper output port 10. The paper output baffle 23 is arranged in a U-shape. The base 1 has a paper output baffle on the opposite side of the paper output baffle 23. The paper output baffles on both sides form the paper output port 10. The paper output baffle 23 is located above the fixed blade 42. The bottom wall of the rotating groove 22 is provided with a drive through hole 224. The drive through hole 224 is close to the paper output baffle 23. The drive unit 32 passes through the drive through hole 224 and is adjacent to the upper part of the fixed blade 42.

[0050] The cover 2 has opening protrusions 35 at both ends of the paper output baffle 23 along the paper width direction Y. A limiting sidewall 36 is provided inside the opening protrusions 35. A first hinge part 34 is located inside the limiting sidewall 36. A trigger part 33 is located inside the limiting sidewall 36 and near the operating part 31, and is arranged in a columnar shape. The paper tray 11 has a trigger mounting groove 121 on one side along the paper width direction Y. The trigger module 12 can be a trigger switch, and is installed in the trigger mounting groove 121, located above the side of the paper tray 11. A trigger through hole 222 is provided through the bottom wall of the rotating groove 22. The trigger part 33 is arranged in a columnar shape and passes through the trigger through hole 222 to cooperate with the trigger module 12. The cover 2 has a clearance groove 351 between the two opening protrusions 35. The clearance groove 351 is U-shaped and has a clearance fit and positioning fit with the paper output baffle 23.

[0051] The surface of the cover 2 is provided with a handle groove 221, which communicates with the rotating groove 22. The operating part 31 is located at the handle groove 221. The base 1 has width edges 111 at both ends of the paper outlet 10 based on the paper width direction Y. The cover opening protrusion 35 is adjacent to the width edge 111, and the limiting sidewall 36 is located on the inner sidewall 112 of the width edge 111 and is in clearance fit with the width edge 111.

[0052] Reference Figure 7 and Figure 8 , Figure 7 and Figure 8 In normal standby mode, the printing paper can be fed through the paper feed to the position of the thermal sheet 41 and the rubber roller 42, and after being printed by the thermal sheet 41, it is output to the paper outlet 10. The trigger part 33 in normal standby mode is adjacent to the trigger module 12.

[0053] Reference Figure 9 Then, the paper is cut by moving the moving blade 41 toward the fixed blade 42. Under normal paper cutting conditions, the paper cutting action can be completed. However, if the blade jams, the paper cannot be cut and the moving blade cannot retract. In this case, troubleshooting is required.

[0054] Reference Figure 10 , Figure 10 When the blade is in the disengaged state, by moving the operating part 31, the flip cover 3 rotates around the hinge, which in turn drives the drive part 32 to rotate. The drive part 32 is adjacent to the fixed blade 42. The rotation of the drive part 32 drives the fixed blade 42 to move away from the moving blade 41. At the same time, refer to Figure 11 The trigger unit 33 separates from the trigger module 12, and then the trigger module 12 can send a reset signal to the active circuit board of the thermal printer, which in turn causes the moving blade drive device 45 to drive the moving blade 41 to retract. Figure 12As shown, this then achieves the retraction state of the moving tool 41 and solves the tool jamming problem. Further, refer to... Figure 13 The opening protrusion 35 is adjacent to the width edge 111. As the cover 3 is flipped further, the first hinge 34 moves upward relative to the opening protrusion 35. Then, the rotation of the operating part 31 drives the opening protrusion 35 to separate from the width edge 111, and finally the cover 2 is opened to facilitate maintenance, cleaning of paper jams or replacement of printing paper.

[0055] Of course, the above embodiments are only preferred embodiments of this case. In addition to these embodiments, the fixed blade elastic element can be an elastic element such as a torsion spring or tension spring, connected between the fixed blade and the cover body, to provide elastic force to the fixed blade. Furthermore, regarding the arrangement of the hinge portion, the arrangement of the hinge hole and hinge post can be interchanged between the cover body and the flip cover, and the number of hinge portions is not limited, which can also achieve the purpose of this case. In addition, regarding the triggering mode of the trigger module, in the normal standby state, the trigger part is separated from the trigger module; in the cutter separation state, the trigger part is adjacent to the trigger module, which can also trigger blade retraction.

[0056] Furthermore, the above-mentioned inventive concept can also be applied to other types of thermal printers, such as those with the rubber roller mounted on the base and the thermal sheet mounted on the cover. In addition to the desktop thermal printer used in this case, it can also be applied to thermal transfer printers, handheld thermal printers, or embedded thermal printers.

[0057] As can be seen from the above, this design integrates the trigger and drive units through a flip cover, allowing users to simply rotate the operating unit when the blade is stuck. This simultaneously drives the fixed blade away from the moving blade and separates or connects the trigger unit with the trigger module, thereby triggering the moving blade to retract and successfully resolving the blade jamming problem. This integrated design simplifies the operation steps, allows for quick resolution of blade jamming issues without disassembling the printer, and improves the reliability and ease of maintenance of the equipment.

Claims

1. A thermal printer that uses a flip-top pressure cutter to solve the problem of blade jamming, comprising a base, a cover, a rubber roller, and a thermal sheet, wherein one of the rubber roller and the thermal sheet is disposed on the base, and the other of the rubber roller and the thermal sheet is disposed on the cover, the cover is located above the base and connected to the base, a paper output port is formed between the cover and the base, and the thermal sheet and the rubber roller are opposite to each other and form a paper feeding channel, the paper feeding channel being in communication with the paper output port; Its features are: The thermal printer also includes a cutting device, a flip cover, and a trigger module. The cutting device includes a moving blade, a moving blade driving device, a fixed blade, and a fixed blade elastic element. The trigger module, the moving blade, and the moving blade driving device are disposed on the base. The fixed blade, the fixed blade elastic element, and the flip cover are disposed on the cover. The moving blade driving device drives the moving blade to move toward the fixed blade along the paper cutting direction. The fixed blade elastic element is connected between the fixed blade and the cover. The fixed blade elastic element applies an elastic holding force to the fixed blade toward the moving blade along the holding direction. The flip cover is provided with a first hinge part, a trigger part, an operation part and a drive part. The operation part and the drive part are respectively located at both ends of the first hinge part. The flip cover is hinged to the cover body through the first hinge part. The operation part drives the drive part to rotate. The drive part is adjacent to the fixed blade. The rotation of the drive part drives the fixed blade to move away from the moving blade. The rotation of the operation part drives the trigger part to separate from or be adjacent to the trigger module.

2. The thermal printer according to claim 1, characterized in that: The surface of the cover is provided with a rotating groove, and the rotating groove is provided with a second hinge portion at both ends in the paper width direction. The first hinge portion is hinged to the second hinge portion, and the flip cover is rotatably installed in the rotating groove.

3. The thermal printer according to claim 2, characterized in that: The cover has a paper outlet baffle wall on the side of the rotating groove near the paper outlet. The paper outlet baffle wall is located above the fixed blade. A drive through hole is provided through the bottom wall of the rotating groove. The drive through hole is close to the paper outlet baffle wall. The drive unit passes through the drive through hole and is adjacent to the fixed blade.

4. The thermal printer according to claim 3, characterized in that: The cover has opening protrusions at both ends of the paper outlet baffle along the paper width direction, and the base has width edges at both ends of the paper outlet along the paper width direction. The opening protrusions are adjacent to the width edges, and the rotation of the operating part causes the opening protrusions to separate from the width edges.

5. The thermal printer according to claim 2, characterized in that: The bottom wall of the rotating groove is provided with a trigger through hole, and the trigger part is arranged in a columnar shape. The trigger part passes through the trigger through hole and cooperates with the trigger module.

6. The thermal printer according to any one of claims 1 to 5, characterized in that: The cutting device includes a fixed blade bracket, which is connected to the cover. The fixed blade bracket has a bracket bottom surface and two fixed blade mounting side walls. The two fixed blade mounting side walls are connected to both ends of the bracket bottom surface in the paper width direction. A fixed blade mounting groove is formed between the bracket bottom surface and the two fixed blade mounting side walls. The fixed blade mounting side walls are provided with limit sliding grooves. The fixed blade is provided with limiting protrusions at both ends in the paper width direction. The limiting protrusions are located in the limiting groove and can move within the limiting groove.

7. The thermal printer according to claim 6, characterized in that: The back side of the blade of the fixed blade is provided with a blade back, and the bottom surface of the bracket is provided with a fixed blade mounting rear wall on the side of the fixed blade mounting groove near the blade back. The fixed blade mounting rear wall is provided with a positioning groove, and the blade back is provided with a positioning block. The positioning block and the positioning groove are in clearance fit.

8. The thermal printer according to claim 6, characterized in that: The thermal printer includes a roller bracket, which has a roller mounting groove extending along the paper width direction. The roller is rotatably mounted in the roller mounting groove. The roller bracket has a supporting top surface above the roller mounting groove. The bottom surface of the bracket is mounted on the supporting top surface, and the supporting top surface is fixedly connected to the cover.

9. The thermal printer according to claim 8, characterized in that: The fixed blade elastic element is a spring, and a spring through groove is provided through the bottom surface of the bracket. The spring is located in the fixed blade mounting groove and passes through the spring through groove. The spring elastically abuts against the fixed blade and the top surface of the support.

10. The thermal printer according to claim 9, characterized in that: The fixed blade support has a front baffle on the bottom surface of the support near the blade of the fixed blade, and a spring groove is provided on the top surface of the support. The spring groove has an inlet near the blade, and the spring can be installed into the spring groove from the inlet. The front baffle covers the inlet.

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