Thermo-sensitive desktop barcode printer with paper tearing knife capable of preventing hands from being scratched and anti-slip and mute cover opening function

Abstract

The invention belongs to the technical field of thermo-sensitive desktop barcode printers, and particularly relates to a thermo-sensitive desktop barcode printer with a paper tearing knife capable of preventing hands from being scratched and an anti-skid and mute cover opening, the thermo-sensitive desktop barcode printer comprises a bottom cover and an upper cover, the upper cover is arranged above the bottom cover, an inner lower bin is fixedly mounted in the bottom cover, an inner upper bin is fixedly mounted in the upper cover, and a paper tearing knife is arranged in the inner upper bin. Two symmetrically distributed mounting grooves are formed in the bottom of the inner upper bin; the two upper positioning elastic arms are symmetrically arranged on the two sides of the inner upper bin, and the two sides of the inner lower bin are each provided with a lower positioning elastic arm; the paper tearing knife is composed of an upper-section fixing plate, a middle-section connecting part and a lower-section cutting part, according to the design, through ingenious linkage of hinge positioning, elastic damping, mechanical limiting and material noise reduction, triple guarantees of opening and closing overturning prevention, closing falling prevention and mute operation are achieved, the operation reliability of equipment is improved in an all-around mode, and the paper tearing knife is convenient to use. And more stable, quiet and convenient use experience is brought to the user.

Description

Technical Field

[0001] The present invention belongs to the technical field of desktop barcode printers, and particularly relates to a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening. Background Art

[0002] A thermal desktop barcode printer is an efficient printing device designed specifically for desktop scenarios. It uses thermal printing technology, where the heating of the print head causes a chemical reaction in the heat-sensitive layer of the thermal paper, quickly generating clear and accurate barcodes and text patterns. It does not require ink cartridges or ribbons, only thermal paper is needed to complete printing, significantly reducing consumable costs and maintenance complexity. At the same time, it has the characteristics of a small size, convenient operation, and fast printing speed, and is suitable for the small-batch label printing needs of multiple industries such as retail, logistics, medical, and catering. The device supports a variety of label sizes and materials, and can be flexibly adapted to scenarios such as product price tags, logistics labels, and drug traceability codes. Some models also integrate functions such as automatic cutting and wireless connection, further optimizing the user experience. With low operating costs, high printing quality, and stable performance, thermal desktop barcode printers have become the preferred tools for small and medium-sized merchants and office scenarios to achieve rapid identification and inventory management.

[0003] For example, a Chinese patent with the publication number CN110949018A discloses a barcode printer, which includes a machine body provided with a paper inlet and a paper outlet, and an installation cavity inside; a carbon ribbon mechanism arranged in the installation cavity, including paired carbon ribbon shafts, a control box, and a fixing plate. The control box is provided with a driving member, and a speed measurement component and a transmission gear set are arranged inside; and a printing mechanism arranged below the carbon ribbon mechanism, including a print head frame with a print head and a paper path frame. Tensioning components and guide plates are respectively arranged at both ends of the print head frame. Adjustment holes are arranged on both the tensioning components and the guide plates, and positioning bolts passing through the adjustment holes and connecting to the print head frame. In the present invention, the speed measurement component detects the output speed of the driving member, calculates the rotation speed of the carbon ribbon shaft according to the transmission ratio, and adjusts the current of the driving member in real time to adjust the carbon ribbon tension, and adjusts the position of the adjustment hole to adjust the installation position and angle of the tensioning component and the guide plate, so that the carbon ribbon is reliably tensioned, which is beneficial to extending the service life of the carbon ribbon and improving the printing quality.

[0004] The above patent has the following problems: In actual use, it does not have a buffer structure, resulting in a loud noise when opening and closing the cabinet door, causing a large vibration to the printer, which is not conducive to the use of the staff. In view of this, we propose a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening. Summary of the Invention

[0005] The purpose of the present invention is to provide a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening, so as to solve the problems raised in the above background art.

[0006] In view of this, the present invention provides a thermal desktop barcode printer with a paper cutter that prevents hand scratching and has anti-slip and silent opening of the cover, including: A bottom cover and an upper cover, the upper cover is arranged above the bottom cover, an inner lower bin is fixedly installed inside the bottom cover, an inner upper bin is fixedly installed inside the upper cover, two symmetrically distributed installation grooves are opened at the bottom of the inner upper bin, two symmetrically distributed installation blocks are fixedly installed at the bottom of the inner upper bin, positioning shaft holes are opened on one side of each of the two installation blocks, and a positioning rotating shaft is arranged inside the two positioning shaft holes; Two upper positioning elastic arms, the two upper positioning elastic arms are symmetrically arranged on both sides of the inner upper bin, lower positioning elastic arms are arranged on both sides of the inner lower bin, an opening cover buckle is arranged at the bottom of the inner upper bin, and a closing cover buckle is arranged at the top of the inner lower bin; A paper cutter, the paper cutter is composed of an upper section fixing plate, a middle section connecting part and a lower section cutting part, an installation plate is fixedly installed at the bottom of the inner upper bin, four positioning holes are opened on the upper section fixing plate of the paper cutter, the fixing plate and the installation plate are fixed by bolts, and a guard edge positioning plate is fixedly installed at the top of the inner lower bin.

[0007] In this technical solution, the inner upper bin and the inner lower bin are hinged through an eccentrically arranged positioning rotating shaft and positioning shaft holes to form a stable rotation axis, and the axis offset is one-fifth of the length of the bin body, optimizing the opening and closing center of gravity distribution; the upper positioning elastic arms and the lower positioning elastic arms are respectively fixed on the side walls of the inner upper bin and the inner lower bin, and the ends adopt arc-shaped protrusions to contact the positioning rotating shaft, providing a progressive damping throughout the opening and closing process through the deformation of an elastic material with an elastic modulus to ensure smooth operation. When opening the cover, the cylindrical protrusions of the first anti-overturning positioning posts and the second anti-overturning positioning posts on both sides of the inner upper bin are inserted into the limiting grooves of the inner lower bin, and cooperate with the elastic return force of the upper positioning elastic arms and the lower positioning elastic arms to form a double lock, restricting the opening and closing angle and resisting lateral external forces; when closing the cover to the 90% stage, the wedge-shaped inclined surface of the opening cover buckle contacts the flexible gasket of the inner lower bin, dispersing the impact force through the inclined surface, and at the same time, the ratchet mechanism built into the closing cover buckle controls the closing speed through the intermittent engagement of the rack and the pawl, avoiding damage to the movement or paper caused by free fall; when finally closing, the transition surface where the opening cover buckle and the closing cover buckle are tangent is coated with a ceramic composite material to form a soft contact with the rubber at the edges of the inner upper bin and the inner lower bin, combined with the residual deformation buffer of the upper positioning elastic arms and the lower positioning elastic arms, completely eliminating the collision noise. This design synchronously realizes anti-overturning during opening and closing, anti-falling during closing, and silent operation through multi-stage linkage of hinged positioning, elastic damping, mechanical limiting and material noise reduction, significantly improving the reliability of the device and the user experience.

[0008] The paper cutter of this device realizes the functions of anti-reflection, anti-cutting hands and quick installation through a Z-shaped three-section structure: the upper fixing plate is aligned and guided by accurately matched positioning holes and positioning pins, and is fastened with a self-tapping screw with one key; the middle section is designed at an inclined angle, combined with the attached high-reflectivity PET reflective sheet, which effectively disperses the interference of ambient light and ensures the stability of the paper detection sensor signal; the lower parallel-tooth blade has uniform spacing and an arc-shaped blade back, which avoids accidental contact with the hand while vertically cutting the paper. During installation, only need to align the holes, tighten the screws and attach the reflective sheet to complete the assembly, which greatly improves the efficiency and reduces the operation risk, realizing the coordinated advantages of structure, optics and safety.

[0009] In the above technical solution, further, first anti-rotation positioning columns are fixedly installed on both sides of the inner upper bin, and second anti-rotation positioning columns are fixedly installed on both sides of the inner lower bin.

[0010] In this technical solution, the upper positioning elastic arm and the lower positioning elastic arm are respectively fixed to the side walls of the inner upper bin and the inner lower bin, and the ends are in contact with the positioning rotating shaft through arc-shaped protrusions. The progressive damping during the whole opening and closing process is provided by the deformation of the elastic material with elastic modulus, ensuring smooth movement.

[0011] In the above technical solution, further, the contact surface of the open cover buckle is a wedge-shaped inclined plane, and a ratchet mechanism is arranged inside the closed cover buckle.

[0012] In this technical solution, the ratchet mechanism built in the closed cover buckle controls the closing speed through the intermittent engagement of the rack and pawl, avoiding damage to the movement or paper caused by free fall.

[0013] In the above technical solution, further, rubber is attached to one side edge of the inner lower bin, and the thickness is 1.5 mm.

[0014] In this technical solution, the rubber on the edges of the inner upper bin and the inner lower bin forms a soft contact, combined with the residual deformation buffer of the upper positioning elastic arm and the lower positioning elastic arm, completely eliminating the collision noise.

[0015] In the above technical solution, further, the axis of the hinge positioning rotating shaft of the inner upper bin and the inner lower bin deviates from the geometric center of the inner upper bin and the inner lower bin, and the offset is one-fifth of the length of the bin body.

[0016] In this technical solution, the inner upper bin and the inner lower bin are hinged through an eccentrically arranged positioning rotating shaft and positioning shaft hole to form a stable rotation axis, and the axis offset is one-fifth of the length of the bin body, optimizing the distribution of the opening and closing center of gravity.

[0017] In the above technical solution, further, the tangent transition surface of the open cover buckle and the closed cover buckle is coated with a ceramic composite material, and the thickness is 20 μm.

[0018] In this technical solution, the super-hard coating of the ceramic composite material significantly extends the service life of the buckle; the extremely low friction coefficient enables silent closing.

[0019] In the above technical solution, further, the shape of the paper cutter is "Z", the height of the tooth tip of the parallel tooth cutting edge of the paper cutter is 0.8 mm, the blade angle is thirty degrees, and the tolerance of the distance between adjacent tooth openings is greater than or equal to 0.05 mm.

[0020] In this technical solution, the parallel tooth cutting edge adopts a uniform spacing of 0.5 - 1.2 mm and an arc-shaped knife back, avoiding accidental contact with the hand while vertically cutting the paper.

[0021] In the above technical solution, further, a positioning groove is opened at the bottom of the fixing plate, a reflective sheet is fixedly installed inside the positioning groove, and the material of the reflective sheet is a PET reflective film.

[0022] In this technical solution, the attached high-reflectivity PET reflective sheet effectively disperses the environmental light interference and ensures the stability of the paper detection sensor signal.

[0023] In the above technical solution, further, the inclination angle of the middle section connecting part is degrees, and it is integrally processed with the upper and lower sections through a bending forming process, and the bending radius R = 1 - 2 mm.

[0024] In this technical solution, the middle section is designed with an inclination angle, which is more suitable for this device.

[0025] The beneficial effects of the present invention are: 1. This device uses an eccentric positioning rotating shaft to be hinged with the shaft hole. The axis is reasonably offset to optimize the opening and closing center of gravity, and is matched with a spring arm with appropriate elastic modulus and deformation amount to ensure smooth opening and closing throughout the process with progressive damping. When opening the cover, the anti-rotation positioning post and the limit groove are precisely matched, and cooperate with the elastic return force of the spring arm to form a double lock, effectively limiting the opening and closing angle, strongly resisting lateral external forces, and preventing accidental flipping of the bin body. When closing the cover to a critical stage, the wedge-shaped inclined surface of the opening buckle disperses the impact, and the ratchet mechanism precisely controls the closing speed to avoid damage to the movement and paper caused by free fall. At the moment of final closing, the buckle is in soft contact with the ceramic composite material and rubber at the edge of the bin body, and combined with the residual deformation buffer of the spring arm, the collision noise is completely eliminated. This design realizes triple guarantees of anti-flipping during opening and closing, anti-falling during closing, and silent operation through the ingenious linkage of hinged positioning, elastic damping, mechanical limit, and material noise reduction, comprehensively improving the operation reliability of the device and bringing a more stable, quiet, and convenient use experience to users.

[0026] 2. The paper cutter of this device adopts an innovative Z-shaped three-section structure, bringing multi-dimensional efficiency enhancement results: The upper fixing plate is accurately aligned through the positioning holes and positioning pins, and fastened with one-key self-tapping screws, simplifying the installation steps, significantly shortening the assembly time, improving production efficiency and reducing the risk of manual operation errors; The middle section has an inclined design combined with a high-reflectivity PET reflective sheet, which can efficiently disperse ambient stray light, create a stable optical field for the paper detection sensor, reduce signal fluctuations caused by light interference, and ensure the accuracy and stability of the equipment operation; The lower parallel-tooth blade edge is integrated with an arc-shaped blade back at uniform intervals. When cutting the paper vertically, the arc-shaped curved surface forms a natural safety barrier to prevent accidental hand contact with the blade edge, taking into account both efficient operation and personnel protection. This design organically unifies the structural adaptability, optical adaptability and safety protection, achieving triple breakthroughs in efficient installation, stable operation and safety guarantee, significantly optimizing the comprehensive performance of the product, and enhancing the user experience and production benefits. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram of the overall structure of the present invention; Figure 2 is a schematic diagram of the inner upper bin structure of the present invention; Figure 3 is a schematic diagram of the inner lower bin structure of the present invention; Figure 4 is a schematic diagram of the open and closed states of the inner upper bin and inner lower bin structures of the present invention; Figure 5 is a schematic diagram of the closed state of the inner upper bin and inner lower bin structures of the present invention; Figure 6 is a schematic diagram of the upper cover and inner upper bin structures of the present invention; Figure 7 is a schematic diagram of the exploded structure of the inner upper bin of the present invention; Figure 8 For the present invention Figure 2 is an enlarged schematic diagram of part A in; Figure 9 For the present invention Figure 3 is an enlarged schematic diagram of part B in; Figure 10 For the present invention Figure 4 is an enlarged schematic diagram of part C in; Figure 11 For the present invention Figure 5 is an enlarged schematic diagram of part D in; Figure 12 For the present invention Figure 6 is an enlarged schematic diagram of part E in; Figure 13 For the present invention Figure 7 is an enlarged schematic diagram of part F in.

[0028] The markings in the figures are shown as: 1. Bottom cover; 2. Upper cover; 3. Inner upper bin; 4. Inner lower bin; 5. Installation groove; 6. Installation block; 7. First anti-rotation positioning post; 8. Upper positioning elastic arm; 9. Positioning shaft hole; 10. Positioning rotating shaft; 11. Lower positioning elastic arm; 12. Second anti-rotation positioning post; 13. Cover closing buckle; 14. Cover opening buckle; 15. Edge protection positioning plate; 16. Installation plate; 17. Fixed plate; 18. Positioning hole; 19. Positioning groove; 20. Reflective sheet; 21. Paper cutter; 22. Side plate. Specific embodiments

[0029] Next, the technical solutions in the embodiments of the present application will be clearly described in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art belong to the scope of protection of the present application.

[0030] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, rather than intending to limit the exemplary embodiments according to the present application. For the convenience of description, the dimensions of each part shown in the drawings are not drawn according to the actual proportional relationship. Technologies, methods, and devices known to those of ordinary skill in the relevant field may not be discussed in detail, but in appropriate cases, the technologies, methods, and devices should be regarded as part of the authorization specification. In all the examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that: similar reference numerals and letters indicate similar items in the following drawings. Therefore, once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0031] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, rather than to describe a specific order or sequence. It should be understood that such data can be interchanged under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described herein, and the objects distinguished by "first", "second", etc. are generally of the same type, and do not limit the number of objects. For example, the first object can be one or more. In addition, "and / or" in the description and claims means at least one of the connected objects. The character " / ", generally represents an "or" relationship between the associated objects before and after.

[0032] It should be noted that in the description of the present application, the orientation or positional relationships indicated by the orientation terms such as "front, rear, upper, lower, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom", etc. are usually based on the orientation or positional relationships shown in the drawings. It is only for the convenience of describing the present application and simplifying the description. Without contrary explanation, these orientation terms do not indicate and imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation on the protection scope of the present application; the orientation terms "inside, outside" refer to the inside and outside relative to the contour of each component itself.

[0033] It should be noted that in the present application, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "comprising a..." does not exclude the presence of additional identical elements in the process, method, article or device comprising the element. In addition, it should be pointed out that the scope of the methods and devices in the embodiments of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in a reverse order according to the functions involved. For example, the described methods may be performed in an order different from that described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0034] Embodiment 1: Please refer to Figures 1-13 As shown, this embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and mute when opening the cover, including: A bottom cover 1 and an upper cover 2, the upper cover 2 is arranged above the bottom cover 1. An inner lower bin 4 is fixedly installed inside the bottom cover 1, and an inner upper bin 3 is fixedly installed inside the upper cover 2. Two symmetrically distributed mounting grooves 5 are formed at the bottom of the inner upper bin 3, and two symmetrically distributed mounting blocks 6 are fixedly installed at the bottom of the inner upper bin 3. A positioning shaft hole 9 is formed on one side of each of the two mounting blocks 6, and a positioning rotating shaft 10 is arranged inside the two positioning shaft holes 9; Two upper positioning elastic arms 8, the two upper positioning elastic arms 8 are symmetrically arranged on both sides of the inner upper bin 3. Lower positioning elastic arms 11 are arranged on both sides of the inner lower bin 4. An opening cover buckle 14 is arranged at the bottom of the inner upper bin 3, and a closing cover buckle 13 is arranged at the top of the inner lower bin 4; Paper cutter 21 is composed of an upper fixing plate 17, a middle connecting part and a lower cutting part. A mounting plate 16 is fixedly installed at the bottom of the inner upper bin 3. Four positioning holes 18 are provided in the upper fixing part of the paper cutter 21. The fixing plate 17 and the mounting plate 16 are fixed by bolts. A side-edge positioning plate 15 is fixedly installed at the top of the inner lower bin 4.

[0035] Among them, the inner upper bin 3 and the inner lower bin 4 are hinged through an eccentrically arranged positioning rotating shaft 10 and a positioning shaft hole 9 to form a stable rotation axis, and the axis offset is one-fifth of the length of the bin body, optimizing the opening and closing center-of-gravity distribution. The upper positioning elastic arm 8 and the lower positioning elastic arm 11 are respectively fixed on the side walls of the inner upper bin 3 and the inner lower bin 4, and the ends are in contact with the positioning rotating shaft 10 by means of arc-shaped protrusions, providing a progressive damping throughout the opening and closing process through the deformation of an elastic material with a certain modulus of elasticity to ensure smooth operation. When opening the cover, the cylindrical protrusions of the first anti-overturning positioning posts 7 and the second anti-overturning positioning posts 12 on both sides of the inner upper bin are inserted into the limiting grooves of the inner lower bin, and cooperate with the elastic return force of the upper positioning elastic arm 8 and the lower positioning elastic arm 11 to form a double lock, restricting the opening and closing angle and resisting lateral external forces. When the cover is closed to the 90% stage, the wedge-shaped inclined surface of the opening cover buckle 14 contacts the flexible gasket of the inner lower bin, dispersing the impact force through the inclined surface. At the same time, the ratchet mechanism built into the closing cover buckle 13 controls the closing speed through the intermittent engagement of the rack and the pawl, avoiding damage to the movement or paper caused by free fall. When finally closed, the tangent transition surface of the opening cover buckle 14 and the closing cover buckle 13 is coated with a ceramic composite material to form a soft contact with the rubber at the edges of the inner upper bin 3 and the inner lower bin 4, combined with the residual deformation buffer of the upper positioning elastic arm 8 and the lower positioning elastic arm 11, completely eliminating the collision noise. This design realizes the functions of anti-overturning during opening and closing, anti-falling during closing and silent operation through the multi-stage linkage of hinged positioning, elastic damping, mechanical limiting and material noise reduction, significantly improving the reliability of the device and the user experience.

[0036] The paper cutter 21 of this device realizes the functions of anti-reflection, anti-cutting hands and quick installation through a Z-shaped three-section structure: the upper fixing plate 17 is aligned and guided by accurately matching positioning holes 18 and positioning pins, and is fastened with self-tapping screws with one key; the middle section is designed at an inclined angle, combined with a high-reflectivity PET reflective sheet 20 attached, effectively dispersing the interference of ambient light and ensuring the stability of the paper detection sensor signal; the lower parallel-tooth cutting edge has uniform spacing and an arc-shaped knife back, avoiding accidental contact with the hand while cutting the paper vertically. During installation, only need to align the holes, tighten the screws and fit the reflective sheet to complete the assembly, greatly improving the efficiency and reducing the operation risk, and realizing the coordinated advantages of structure, optics and safety.

[0037] Embodiment 2: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. On both sides of the inner upper bin 3, first anti-overturn positioning posts 7 are fixedly installed, and on both sides of the inner lower bin 4, second anti-overturn positioning posts 12 are fixedly installed.

[0038] Among them, the upper positioning elastic arm 8 and the lower positioning elastic arm 11 are respectively fixed to the side walls of the inner upper bin 3 and the inner lower bin 4, and the ends are in contact with the positioning rotating shaft 10 through arc-shaped protrusions, providing a progressive damping throughout the opening and closing process through the deformation of an elastic material with an elastic modulus to ensure smooth operation.

[0039] Embodiment 3: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. The contact surface of the lid-opening buckle 14 is a wedge-shaped inclined plane, and a ratchet mechanism is arranged inside the lid-closing buckle 13.

[0040] Among them, the ratchet mechanism built into the lid-closing buckle 13 controls the closing speed through the intermittent engagement of the rack and pawl, avoiding damage to the movement or paper caused by free fall.

[0041] Embodiment 4: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. A rubber is attached to one side edge of the inner lower bin 4, with a thickness of 1.5 mm.

[0042] Among them, the rubber on the edges of the inner upper bin 3 and the inner lower bin 4 forms a soft contact, combined with the residual deformation buffer of the upper positioning elastic arm 8 and the lower positioning elastic arm 11, completely eliminating the collision noise.

[0043] Embodiment 5: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand scratching and anti-slip and silent lid opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. The axis of the hinge positioning rotating shaft 10 of the inner upper bin 3 and the inner lower bin 4 deviates from the geometric centers of the inner upper bin 3 and the inner lower bin 4, and the offset is one-fifth of the length of the bin body.

[0044] Among them, the inner upper bin 3 and the inner lower bin 4 are hinged through the eccentrically arranged positioning rotating shaft 10 and positioning shaft hole 9 to form a stable rotation axis, and its axis offset is one-fifth of the length of the bin body, optimizing the distribution of the opening and closing center of gravity.

[0045] Embodiment 6: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand cuts and anti-slip and silent cover opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. The tangent transition surface between the cover opening buckle 14 and the cover closing buckle 13 is coated with a ceramic composite material, and its thickness is 20 μm.

[0046] Among them, the super-hard coating of the ceramic composite material significantly extends the service life of the buckle; the extremely low friction coefficient realizes silent closing.

[0047] Embodiment 7: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand cuts and anti-slip and silent cover opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. The shape of the paper cutter 21 is "Z" - shaped. The tooth tip height of the parallel tooth cutting edge of the paper cutter 21 is 0.8 mm, the blade angle is 30 degrees, and the tolerance of the distance between adjacent tooth openings is greater than or equal to 0.05 mm.

[0048] Among them, the parallel tooth cutting edge uses a uniform spacing of 0.5 - 1.2 mm and an arc - shaped knife back to avoid accidental contact with the hand while vertically cutting the paper.

[0049] Embodiment 8: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand cuts and anti-slip and silent cover opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. A positioning groove 19 is opened at the bottom of the fixing plate 17, and a reflective sheet 20 is fixedly installed inside the positioning groove 19. The material of the reflective sheet 20 is PET reflective film.

[0050] Among them, the attached high - reflectivity PET reflective sheet 20 effectively disperses environmental light interference and ensures the stability of the paper detection sensor signal.

[0051] Embodiment 9: This embodiment provides a thermal desktop barcode printer with a paper cutter that prevents hand cuts and anti-slip and silent cover opening. In addition to the technical solutions of the above embodiments, it also has the following technical features. The inclination angle of the middle section connecting part is 22 degrees, and it is integrally processed with the upper and lower sections through a bending forming process, and the bending radius R = 1 - 2 mm.

[0052] Among them, the middle section is designed with an inclination angle to be more adaptable to this device.

[0053] Working principle: The inner upper bin 3 and the inner lower bin 4 are hinged through the eccentrically arranged positioning rotating shaft 10 and the positioning shaft hole 9 to form a stable rotation axis, and the axis offset is one-fifth of the bin body length, optimizing the opening and closing center of gravity distribution; the upper positioning elastic arm 8 and the lower positioning elastic arm 11 are respectively fixed on the side walls of the inner upper bin 3 and the inner lower bin 4, and the ends are in contact with the positioning rotating shaft 10 through arc-shaped protrusions, and provide progressive damping throughout the opening and closing process through the deformation (deformation amount 5% - 15%) of the elastic material with an elastic modulus of 50 - 100 MPa to ensure smooth movement. When opening the cover, the first anti-rotation positioning posts 7 and the second anti-rotation positioning posts 12 (cylindrical protrusions) on both sides of the inner upper bin are inserted into the limit slots of the inner lower bin (depth > 1 / 2 of the height of the positioning posts), and cooperate with the elastic return force of the upper positioning elastic arm 8 and the lower positioning elastic arm 11 to form a double lock, restricting the opening and closing angle and resisting lateral external forces; when closing the cover to the 90% stage, the wedge-shaped inclined surface of the opening cover buckle 14 contacts the flexible gasket of the inner lower bin, dispersing the impact force through the inclined surface. At the same time, the ratchet mechanism built into the closing cover buckle 13 controls the closing speed through the intermittent engagement of the rack and the pawl, avoiding free fall damage to the movement or paper; when finally closing, the tangent transition surface of the opening cover buckle 14 and the closing cover buckle 13 is coated with a 10 - 50 μm ceramic composite material to form a soft contact with the rubber with a thickness of 1.5 mm at the edges of the inner upper bin 3 and the inner lower bin 4, combined with the residual deformation buffer of the upper positioning elastic arm 8 and the lower positioning elastic arm 11, completely eliminating the collision noise. This design realizes anti-rotation during opening and closing, anti-fall during closing, and silent operation through the multi-stage linkage of hinged positioning, elastic damping, mechanical limit, and material noise reduction, significantly improving the reliability of the device and the user experience.

[0054] The paper cutter 21 of this device realizes the functions of anti-reflection, anti-scratching, and quick installation through a Z-shaped three-section structure: the upper fixing plate 17 is aligned and guided through the accurately matched positioning holes 18 and positioning pins, and is fastened with a self-tapping screw with one key; the middle section is designed at an inclined angle of 22 degrees, combined with the attached high-reflectivity PET reflective sheet 20, effectively dispersing the interference of ambient light and ensuring the stability of the paper detection sensor signal; the lower parallel tooth cutting edge has a uniform spacing of 0.5 - 1.2 mm and an arc-shaped knife back, avoiding accidental contact with the hand while vertically cutting the paper. During installation, only need to align the holes, tighten the screws, and attach the reflective sheet to complete the assembly, greatly improving the efficiency and reducing the operation risk, and realizing the synergistic advantages of structure, optics, and safety.

[0055] The embodiments of the present application have been described above in conjunction with the accompanying drawings. Without conflict, the embodiments and the features in the embodiments in the present application can be combined with each other. The present application is not limited to the above specific embodiments. The above specific embodiments are only illustrative and not restrictive. Under the inspiration of the present application, those of ordinary skill in the art can also make many forms without departing from the purpose of the present application and the scope protected by the claims, and all belong to the protection scope of the present application.

Claims

1. A thermal desktop barcode printer with a paper cutter that prevents hand scratching, anti-slip and silent when opening the cover, characterized in that, Including: A bottom cover (1) and an upper cover (2), the upper cover (2) is arranged above the bottom cover (1), an inner lower bin (4) is fixedly installed inside the bottom cover (1), an inner upper bin (3) is fixedly installed inside the upper cover (2), two symmetrically distributed mounting grooves (5) are opened at the bottom of the inner upper bin (3), two symmetrically distributed mounting blocks (6) are fixedly installed at the bottom of the inner upper bin (3), positioning shaft holes (9) are opened on one side of each of the two mounting blocks (6), and a positioning rotating shaft (10) is arranged inside the two positioning shaft holes (9); Two upper positioning elastic arms (8), the two upper positioning elastic arms (8) are symmetrically arranged on both sides of the inner upper bin (3), lower positioning elastic arms (11) are arranged on both sides of the inner lower bin (4), an opening cover buckle (14) is arranged at the bottom of the inner upper bin (3), and a closing cover buckle (13) is arranged at the top of the inner lower bin (4); A paper tearing knife (21), the paper tearing knife (21) is composed of an upper section fixing plate (17), a middle section connecting part and a lower section cutting part, a mounting plate (16) is fixedly installed at the bottom of the inner upper bin (3), four positioning holes (18) are opened in the upper section fixing part of the paper tearing knife (21), the fixing plate (17) and the mounting plate (16) are fixed by bolts, and a side protection positioning plate (15) is fixedly installed at the top of the inner lower bin (4).

2. The thermal desktop barcode printer with anti-cut hand and anti-slip, silent lid opening for the paper cutter according to claim 1, characterized in that, First anti-rotation positioning columns (7) are fixedly installed on both sides of the inner upper bin (3), and second anti-rotation positioning columns (12) are fixedly installed on both sides of the inner lower bin (4).

3. The thermal desktop barcode printer with anti-cut hand and anti-slip, silent lid opening for the paper cutter according to claim 1, characterized in that, The contact surface of the opening cover buckle (14) is a wedge-shaped inclined surface, and a ratchet mechanism is arranged inside the closing cover buckle (13).

4. The thermal desktop bar code printer with anti-cutting hands and anti-slip, silent open lid according to claim 1, wherein Rubber is attached to one side edge of the inner lower bin (4), and the thickness is 1.5 mm.

5. The thermal desktop barcode printer with anti-cut hand and anti-slip, silent lid opening for a paper cutter according to claim 1, wherein The axis of the hinged positioning rotating shaft (10) of the inner upper bin (3) and the inner lower bin (4) deviates from the geometric center of the inner upper bin (3) and the inner lower bin (4), and the offset is one-fifth of the length of the bin body.

6. The thermal desktop barcode printer with anti-cutting hands and anti-slip and silent lid opening according to claim 1, characterized in that, The tangent transition surface of the opening cover buckle (14) and the closing cover buckle (13) is coated with a ceramic composite material, and the thickness is 20 μm.

7. The thermal desktop bar code printer with anti-cutting hands and anti-slip and silent open cover according to claim 1, characterized in that The shape of the paper tearing knife (21) is "Z", the tooth tip height of the parallel tooth cutting edge of the paper tearing knife (21) is 0.8 mm, the blade angle is 30 degrees, and the tolerance of the distance between adjacent tooth openings is greater than or equal to 0.05 mm.

8. The thermal desktop barcode printer for preventing hand scratching and anti-slip and silent opening of the paper cutter according to claim 1, characterized in that, A positioning groove (19) is opened at the bottom of the fixing plate (17), a reflective sheet (20) is fixedly installed inside the positioning groove (19), and the material of the reflective sheet (20) is a PET reflective film.

9. The thermal desktop bar code printer for preventing hand scratching and anti-slip and silent cover opening according to claim 1, characterized in that, The inclination angle of the middle section connecting part is 22 degrees, and it is integrally processed with the upper and lower sections through a bending forming process, and the bending radius R = 1-2 mm.

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