Rubber roller mechanism with detachable rubber roller and printer thereof

Abstract

According to the rubber roller mechanism with the detachable rubber roller and the printer thereof, the rubber roller mechanism comprises a rubber roller assembly and a rubber roller fixing seat, the rubber roller fixing seat is fixed to a rack of the printer, and the rubber roller assembly is detachably installed on the rubber roller fixing seat and used for driving a printing medium and a thermal transfer ribbon to move along a preset path; wherein the rubber roller assembly comprises an unlocking piece, a roller core and a flexible layer arranged on the outer side of the roller core, the two ends of the roller core are provided with a first shaft head and a second shaft head used for being in transmission connection with a driving mechanism of the printer respectively, and a rubber roller containing groove is formed in the rubber roller fixing base; the roller core is rotationally installed in the rubber roller containing groove, and the unlocking piece is installed on the first shaft head and used for unlocking the rubber roller assembly in the rubber roller containing groove.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and in particular to a detachable rubber roller mechanism and printer thereof. Background Technology

[0002] Printers are widely used in people's daily lives, especially in offices, where they are standard equipment. Currently, printers can be categorized into various types based on their function, including general-purpose printers, commercial printers, and portable printers. Before the printing media is fed into the printing area, it needs to be propelled by rotating rubber rollers. After a period of friction, the diameter of these rollers decreases, affecting paper feeding accuracy and requiring replacement. However, the roller shafts are usually fixed with screws, requiring screwdrivers or other special tools for replacement, which is time-consuming and inconvenient for printer repair and maintenance. Utility Model Content

[0003] This utility model provides a detachable rubber roller mechanism and its printer, aiming to solve at least one of the technical problems existing in the prior art.

[0004] According to a first aspect of the present invention, the present invention provides a detachable rubber roller mechanism for use in a printer. The rubber roller mechanism includes a rubber roller assembly and a rubber roller fixing seat. The rubber roller fixing seat is fixed on the frame of the printer. The rubber roller assembly is detachably mounted on the rubber roller fixing seat and is used to drive the printing medium and ribbon to move along a preset path.

[0005] The roller assembly includes an unlocking component, a roller core, and a flexible layer disposed on the outside of the roller core. The roller core has a first shaft head and a second shaft head for transmission connection with the drive mechanism of the printer at both ends. A roller receiving groove is formed on the roller fixing seat. The roller core is rotatably mounted in the roller receiving groove. The unlocking component is mounted on the first shaft head and is used to unlock the roller assembly locked in the roller receiving groove.

[0006] In a rubber roller mechanism according to an embodiment of this application, the rubber roller assembly further includes a first bearing member and a second bearing member. The first shaft head is detachably connected to one end of the rubber roller receiving groove through the first bearing member, and the second shaft head is detachably connected to the other end of the rubber roller receiving groove through the second bearing member.

[0007] In a rubber roller mechanism according to an embodiment of this application, the rubber roller assembly further includes a first elastic element and a second elastic element. The first elastic element is disposed in the first shaft head to drive the first bearing member to engage with the rubber roller fixing seat, and the second elastic element is disposed in the second shaft head to drive the second bearing member to engage with the rubber roller fixing seat.

[0008] In a rubber roller mechanism according to an embodiment of this application, the unlocking component is a press-fit buckle, which is used to engage with the first end of the rubber roller receiving groove to realize one-way press-unlocking of the rubber roller assembly.

[0009] In a rubber roller mechanism according to an embodiment of this application, the rubber roller assembly further includes a first retaining ring and a second retaining ring. The first bearing member is fixed in the first shaft head by the first retaining ring, and the second bearing member is fixed in the second shaft head by the second retaining ring.

[0010] In a rubber roller mechanism according to an embodiment of this application, the rubber roller receiving groove has a first end and a second end disposed opposite to each other, the first shaft head is rotatably mounted on the first end via the first bearing member, and the second shaft head is rotatably mounted on the second end via the second bearing member.

[0011] In a rubber roller mechanism according to an embodiment of this application, the second shaft head is provided with a flat structure, and the first gear of the drive mechanism is provided with a locking groove, and the flat structure cooperates with the locking groove.

[0012] In a rubber roller mechanism according to one embodiment of this application, the fit tolerance between the locking groove and the flat structure is in the range of -0.05mm to 0.05mm.

[0013] In a roller mechanism according to an embodiment of this application, the outer surface of the flexible layer has a textured surface to increase the friction of the printing medium during transmission.

[0014] According to a second aspect of the present invention, the present invention also provides a printer including the aforementioned rubber roller mechanism.

[0015] The technical solution provided in this application embodiment can include the following beneficial effects: This application designs a detachable rubber roller mechanism and its printer, including a rubber roller assembly and a rubber roller fixing seat. The rubber roller fixing seat is fixed on the printer frame, and the rubber roller assembly is detachably installed on the rubber roller fixing seat, realizing tool-free and quick replacement of the rubber roller assembly, greatly shortening maintenance time. The rubber roller assembly includes an unlocking component, a roller core, and a flexible layer disposed on the outside of the roller core. The roller core has a first shaft head and a second shaft head for transmission connection with the printer's drive mechanism, respectively, at both ends. A rubber roller receiving groove is formed on the rubber roller fixing seat. The unlocking component is installed on the first shaft head to unlock the rubber roller assembly from locking in the rubber roller receiving groove. This not only facilitates the disassembly and assembly of the rubber roller assembly, avoiding the need for complete replacement of the rubber roller mechanism and saving consumable costs, but also reduces maintenance costs. No professional personnel or special tools are required; ordinary users can operate it, greatly reducing labor costs.

[0016] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a partial structural schematic diagram of a printer provided in one embodiment of this application;

[0019] Figure 2 yes Figure 1 A partially exploded diagram of the printer in the image;

[0020] Figure 3 yes Figure 1 A schematic diagram of the rubber roller mechanism in the diagram;

[0021] Figure 4 yes Figure 1 An exploded view of the rubber roller mechanism in the diagram;

[0022] Figure 5 yes Figure 1 Partial cross-sectional view of the rubber roller assembly in the middle;

[0023] Figure 6 yes Figure 1 A partially exploded view of the rubber roller assembly in the image;

[0024] Figure 7 yes Figure 1 A schematic diagram of the balancing mechanism in the diagram;

[0025] Figure 8 yes Figure 1 A schematic diagram of the balancing mechanism in the diagram;

[0026] Figure 9 yes Figure 1 A cross-sectional schematic diagram of the adjustment components in the diagram;

[0027] Figure 10 yes Figure 1 An exploded view of the adjustment components;

[0028] Figure 11 yes Figure 1 A partial exploded view of the adjustment components.

[0029] Explanation of reference numerals in the attached figures:

[0030] 100. Rubber roller mechanism; 200. Balancing mechanism; 300. Frame; 400. Drive mechanism; 401. First gear; 4011. Locking groove;

[0031] 10. Rubber roller assembly; 11. Roller core; 111. First shaft head; 112. Second shaft head; 1121. Flat structure; 12. Flexible layer; 13. Unlocking component; 14. First bearing component; 15. Second bearing component; 16. First elastic component; 17. Second retaining ring;

[0032] 20. Rubber roller fixing seat; 21. Rubber roller receiving groove; 211. First end; 212. Second end;

[0033] 30. Adjusting component; 31. Fixing block; 31a. First mounting surface; 311a. First groove; 31b. Second mounting surface; 311b. Second groove; 311. Flat hole; 312. Receiving groove; 32. Adjusting wheel; 33. Adjusting rod; 331. Screw structure; 332. Limiting component; 34. Deformation component; 341. Adjusting spring; 342. Adjusting plug; 343. Connecting shaft; 35. Pressing component; 351. Pressing nut; 352. Pressing sleeve; 36. Pressure shaft;

[0034] 40. Ribbon holder; 50. Printhead assembly. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0036] It should also be understood that the terminology used in this utility model specification is merely for describing specific aspects of the present application. It is important to understand that terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0037] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0038] like Figures 1 to 11 As shown, this application provides a printer, including a frame 300, a roller mechanism 100, and a balancing mechanism 200. Both the roller mechanism 100 and the balancing mechanism 200 are mounted on the frame 300, and a gap exists between them to allow the printing media and ribbon to pass through. The balancing mechanism 200 ensures reliable contact between the printhead assembly 50 and the ribbon during printing. The frame 300 also includes a drive mechanism 400, which is connected to the roller assembly 10 of the roller mechanism 100. The drive mechanism 400 drives the roller assembly 10 to rotate, thereby moving the printing media and ribbon along a predetermined path through friction.

[0039] In one alternative implementation, such as Figures 2 to 6As shown, the roller mechanism 100 includes a roller assembly 10 and a roller fixing seat 20. The roller fixing seat 20 is fixed on the frame 300. The roller assembly 10 is detachably mounted on the roller fixing seat 20 and is used to drive the printing media and ribbon to move along a preset path. The rubber roller assembly 10 includes an unlocking component 13, a roller core 11, and a flexible layer 12 disposed on the outside of the roller core 11. The roller core 11 has a first shaft head 111 and a second shaft head 112 at its two ends. A rubber roller receiving groove 21 is formed on the rubber roller fixing seat 20. The roller core 11 is rotatably installed in the rubber roller receiving groove 21. The second shaft head 112 is connected to the drive mechanism 400. The unlocking component 13 is installed on the first shaft head 111 and is used to unlock the rubber roller assembly 10 from the rubber roller receiving groove 21, so as to realize the tool-free quick replacement of the rubber roller assembly 10, which greatly shortens the maintenance time. This not only facilitates the disassembly and assembly of the rubber roller assembly 10 and avoids the overall replacement of the rubber roller mechanism 100, saving consumable costs, but also reduces maintenance costs. No professional personnel or special tools are required, and ordinary users can operate it, which greatly reduces labor costs.

[0040] For example, the roller holder 20 serves as a basic support component for the roller mechanism 100, fixing the roller mechanism 100 to the frame 300 and providing a stable mounting reference for the roller mechanism 100. The roller receiving groove 21 is used to achieve precise positioning of the roller assembly 10, ensuring its alignment with the drive mechanism 400 and other transmission components. The second shaft head 112 is connected to the drive mechanism 400 for transmitting power; the unlocking element 13 is connected to the first shaft head 111 for manual unlocking. The flexible layer 12 covers the outer side of the roller core 11, providing friction to transport printing media and ribbon while buffering pressure. The unlocking element 13 includes, but is not limited to, a button, lever, or knob structure, so that the locking state of the roller core 11 can be released by pressing or rotating. The flexible layer 12 includes, but is not limited to, rubber or silicone.

[0041] When the rubber roller assembly 10 is installed into the rubber roller receiving groove 21, the second shaft head 112 is inserted into the locking groove 4011 of the drive mechanism 400 to ensure the transmission connection between the rubber roller assembly 10 and the drive mechanism 400. Then, the side of the first shaft head 111 is aligned with the rubber roller receiving groove 21, and the unlocking member 13 is pressed to compress the first bearing member 14 towards the side of the second shaft head 112. The rubber roller assembly 10 is then pushed into the rubber roller receiving groove 21. The unlocking member 13 is released, and it resets, causing the first bearing member 14 to engage or lock with the first end 211 of the rubber roller receiving groove 21. When the rubber roller assembly 10 needs to be removed from the rubber roller receiving groove 21, the unlocking member 13 is operated to release the lock, and the rubber roller assembly 10 can be pulled out of the rubber roller receiving groove 21 without tools, simplifying the maintenance process. It also eliminates the need to disassemble the entire machine, allowing for direct replacement of worn rubber rollers or cleaning of paper jams. The receiving groove 312 ensures the parallelism between the rubber roller and the drive mechanism 400, preventing media deviation. The unlocking component 13 requires force applied in a specific direction to prevent accidental detachment during printing, such as by pressing and / or rotating.

[0042] In an optional embodiment, the roller assembly 10 further includes a first bearing member 14 and a second bearing member 15. A first shaft head 111 is detachably connected to one end of the roller receiving groove 21 via the first bearing member 14, and a second shaft head 112 is detachably connected to the other end of the roller receiving groove 21 via the second bearing member 15. This not only ensures that the roller assembly 10 can withstand high-speed rotation but also improves the transmission accuracy and durability of the roller assembly 10, making it suitable for high-load, high-precision printing environments. The first bearing member 14 and the second bearing member 15 can be configured as an asymmetrical structure to avoid reverse installation. The first bearing member 14 and the second bearing member 15 can also be replaced individually without scrapping the entire roller assembly 10.

[0043] In an optional embodiment, the roller assembly 10 further includes a first elastic element 16 and a second elastic element. The first elastic element 16 is disposed in the first shaft head 111 to drive the first bearing 14 to engage with the roller mounting base 20, and the second elastic element is disposed in the second shaft head 112 to drive the second bearing 15 to engage with the roller mounting base 20. This ensures automatic locking and quick disengagement between the roller assembly 10 and the roller mounting base 20, making the roller mounting base 20 more convenient and reliable to operate while ensuring stable transmission. The first elastic element 16 and the second elastic element not only provide continuous axial elastic force to the first bearing 14 and the second bearing 15, driving them to engage with the roller mounting base 20 and ensuring that the roller assembly 10 will not accidentally fall off during operation, but also absorb high-frequency micro-vibrations of the roller assembly 10 during the printing process, reducing noise and extending bearing life. Furthermore, the rubber roller assembly 10 can be disassembled by overcoming the elastic forces of the first elastic member 16 and the second elastic member only through the unlocking member 13, without the need for additional tools such as pressing or flicking the unlocking member 13.

[0044] For example, when the rubber roller assembly 10 is installed, it is inserted into the rubber roller receiving groove 21, so that the flat structure 1121 of the second shaft head 112 is inserted into the locking groove 4011. Then, the rubber roller assembly 10 is pushed into the rubber roller receiving groove 21, so that the first bearing member 14 contacts the first end 211 of the rubber roller receiving groove 21, compressing the first elastic member 16. Then, the unlocking member 13 is released, so that the first elastic member 16 is released, pushing the first bearing member 14 to move toward the side of the first end 211. During the process of pushing the rubber roller assembly 10 into the rubber roller receiving groove 21, the second bearing member 15 abuts against the second end 212 of the rubber roller receiving groove 21 under the elastic action of the second elastic member. When it is necessary to remove the rubber roller assembly 10 from the rubber roller receiving groove 21, press the unlocking member 13 on one side, the first elastic member 16 is compressed, the first bearing member 14 is disengaged from the first end 211, and then the rubber roller assembly 10 is tilted slightly, the second elastic member deforms and the second bearing member 15 is disengaged from the drive end, so that the entire rubber roller assembly 10 can be pulled out.

[0045] In an optional embodiment, the unlocking element 13 is a press-fit buckle, which is used to engage with the first end 211 of the rubber roller receiving groove 21 to realize one-way press-unlocking of the rubber roller assembly 10, which simplifies the disassembly operation of the rubber roller assembly 10 and ensures its stability in the working state.

[0046] In an optional embodiment, the rubber roller assembly 10 further includes a first retaining ring and a second retaining ring 17. The first bearing member 14 is fixed in the first shaft head 111 by the first retaining ring, and the second bearing member 15 is fixed in the second shaft head 112 by the second retaining ring 17. This prevents the first bearing member 14 and the second bearing member 15 from moving when subjected to axial force, avoids unlocking failure or transmission disengagement, and ensures the stability of the rubber roller assembly 10 during high-speed rotation or frequent disassembly and assembly.

[0047] In an optional embodiment, the roller receiving groove 21 has a first end 211 and a second end 212 disposed opposite to each other. A first shaft head 111 is rotatably mounted on the first end 211 via a first bearing member 14, and a second shaft head 112 is rotatably mounted on the second end 212 via a second bearing member 15. This achieves stable rotation and precise positioning of the roller assembly 10 while maintaining the characteristic of quick assembly and disassembly. The coaxiality tolerance of the first end 211 and the second end 212 is ≤0.05mm, ensuring that the roller is parallel to the pressure roller and preventing media deviation. Simultaneously, the load is shared by the first bearing member 14 and the second bearing member 15, avoiding the cantilever beam effect. This symmetrical mechanical design extends the service life of the roller assembly 10, making it suitable for high-speed or wide-format printing.

[0048] In an optional embodiment, the second shaft head 112 is provided with a flat structure 1121, and the first gear 401 of the drive mechanism 400 is provided with a locking groove 4011. The flat structure 1121 cooperates with the locking groove 4011 to realize efficient power transmission and quick alignment installation between the rubber roller assembly 10 and the drive mechanism 400, while preventing slippage or phase shift during operation.

[0049] For example, the drive mechanism 400 includes a drive motor and a first gear 401 connected to the drive motor. A locking groove 4011 is formed on the first gear 401 for engaging with the flat structure 1121 to achieve positioning and transmission between the rubber roller assembly 10 and the first gear 401, so that the rubber roller assembly 10 rotates synchronously under the drive of the drive motor. The fit tolerance between the locking groove 4011 and the flat structure 1121 is within the range of -0.05mm to 0.05mm, enabling automatic alignment without adjustment. Furthermore, in its natural state, the contact surface pressure between the locking groove 4011 and the flat portion of the flat structure 1121 is ≥8N, ensuring no axial runout during printing.

[0050] In an alternative embodiment, a locking sound can be heard when the first bearing member 14 is engaged with the first end 211 after a thrust of approximately 10 N is applied by pressing the buckle.

[0051] In an optional embodiment, the outer surface of the flexible layer 12 has an uneven texture to increase the friction of the printing medium during transmission, making the transmission more stable.

[0052] In one alternative implementation, such as Figure 2 , Figures 7 to 11 As shown, the balancing mechanism 200 includes a ribbon holder 40, a printhead assembly 50, and an adjustment component 30. The printhead assembly 50 is movably mounted on the printer frame 300 via the ribbon holder 40. The adjustment component 30 is used to adjust the clamping force of the printhead assembly 50. The printhead on the printhead assembly 50 tightly presses the ribbon and printing media. When printing is required, the printhead heats up, causing the toner on the ribbon to be printed onto the printing media. Simultaneously, the rotating roller assembly 10 generates a clamping force through friction, pushing the ribbon and printing media outward.

[0053] In an optional embodiment, the adjustment assembly 30 includes an adjustment wheel 32, a deformable element 34, an adjustment rod 33, and a fixing block 31 mounted on the ribbon support 40. The adjustment wheel 32 is rotatably mounted in the fixing block 31 and protrudes from both sides of the fixing block 31. The adjustment rod 33 passes through the fixing block 31 and can cooperate with the adjustment wheel 32 to squeeze the deformable element 34 to adjust the clamping force of the printhead assembly 50. This allows for adjustable control of the contact pressure between the ribbon and the printing medium during printer operation, ensuring uniformity, flatness, and stability of the print density. Simultaneously, the adjustment wheel 32 can be freely adjusted to a suitable pressure position according to the different thicknesses of the printing medium and the printing speed, achieving precise control of the clamping force of the printhead assembly 50 and ensuring pressure balance between the printing medium and the ribbon.

[0054] For example, the printhead assembly 50 is rotatably connected to the ribbon holder 40 via a rotating shaft on the side away from the adjusting assembly 30. The ribbon holder 40 has an arc-shaped track groove for engaging with the limiting pin on the printhead assembly 50, thereby achieving a floating installation of the printhead assembly 50. This allows for precise control of printing pressure through the deformation capability of the deformable component 34. Since the adjusting wheel 32 protrudes from both sides of the fixing block 31, it is not obstructed after the ribbon is installed, allowing for pressure adjustment and ensuring consistent print quality. This also significantly reduces the technical requirements for operators.

[0055] In an optional embodiment, the fixing block 31 includes a first mounting surface 31a and a second mounting surface 31b. The first mounting surface 31a is provided with a first groove 311a, and the second mounting surface 31b is provided with a second groove 311b. The adjusting wheel 32 is rotatably installed in the first groove 311a and the second groove 311b, which realizes the stable bearing and precise positioning of the adjusting wheel 32, and simplifies the assembly process.

[0056] In an optional embodiment, the adjusting rod 33 includes a screw structure 331 and a limiting member 332. The screw structure 331 is installed in the first mounting surface 31a and the second mounting surface 31b through the limiting member 332. The adjusting wheel 32 is threadedly connected to the screw structure 331, so that the screw structure 331 can form an integral structure with the fixing block 31. This realizes precise fine-tuning and mechanical self-locking of the pressure adjustment of the printhead assembly 50, and at the same time, it can also achieve stable support by utilizing the double mounting surfaces of the fixing block 31.

[0057] In an optional embodiment, the adjustment assembly 30 further includes a pressing member 35. The fixing block 31 is provided with a receiving groove 312, and the pressing member 35 is disposed in the receiving groove 312. One end of the screw structure 331 extends into the fixing block 31 and is connected to the pressing member 35. This not only evenly distributes the axial thrust of the screw structure 331 to the deformable member 34, avoiding local stress concentration that could lead to premature failure of the deformable member 34, but also ensures that the pressing member 35 moves only axially by being constrained by the side wall of the receiving groove 312. When the pressure exceeds the limit, the pressing member 35 contacts the bottom of the receiving groove 312 to form a mechanical hard limit, thereby optimizing the pressure transmission path and load balancing of the printhead assembly 50, and also improving the stability of the adjustment accuracy.

[0058] In an optional embodiment, the pressure member 35 includes a pressure nut 351 and a pressure sleeve 352. The screw structure 331 is threadedly connected to the pressure nut 351, and the pressure sleeve 352 is fitted on the outside of the pressure nut 351, thereby achieving a balance between fine control of pressure regulation and long-term durability.

[0059] In an optional embodiment, the deformable element 34 includes an adjusting spring 341 and an adjusting plug 342. The adjusting plug 342 is installed at one end of the screw structure 331 that extends out of the fixing block 31. The two ends of the adjusting spring 341 abut against the adjusting plug 342 and the adjusting wheel 32, respectively, so as to convert the linear movement of the adjusting wheel 32 along the screw structure 331 into a controllable elastic pressure output, thereby realizing the dynamic adjustment and self-adaptation of the printhead clamping force and greatly improving the system durability while ensuring adjustment accuracy.

[0060] In an optional embodiment, the deformable element 34 includes a connecting shaft 343, one end of which passes through the screw structure 331 and is secured by a retaining ring. An adjusting plug 342 is movably mounted on the other end of the connecting shaft 343, extending out of the screw structure 331. When the adjusting wheel 32 presses down on the adjusting spring 341, the adjusting spring 341 undergoes elastic deformation. The greater the deformation, the greater the pressure, and the greater the clamping force of the printhead assembly 50 on the ribbon and printing medium. Furthermore, based on the elastic deformation characteristics of the adjusting spring 341, this application can also achieve pressure compensation with self-adjusting pressure during the movement of the ribbon and printing medium.

[0061] In an alternative embodiment, the adjusting plug 342 is made of silicone material, which can prevent the adjusting component 30 from scratching other parts during use and play a protective role.

[0062] In an optional embodiment, the adjustment component 30 includes a pressure shaft 36, and a fixing block 31 is mounted on the ribbon support 40 via the pressure shaft 36. This can be used to adjust the axial direction of the adjustment component 30 to accommodate the width of different printing media, i.e., it can be flexibly adjusted according to different paper widths.

[0063] In an optional embodiment, the pressure shaft 36 has a flat portion, and the fixing block 31 has a flat hole 311, which is fixed in the flat portion. The flat portion can serve as an assembly reference to ensure that the fixing block 31 is accurately positioned on the pressure shaft 36 and to avoid circumferential runout.

[0064] In one alternative implementation, the pressure shaft 36 is a milled flat shaft, which can prevent circumferential runout of the fixing block 31. Alternatively, the pressure shaft 36 is a smooth shaft, and the fixing block 31 can be tightened against the smooth shaft with an M3 screw to ensure that the fixing block 31 is accurately positioned on the pressure shaft 36 and avoid circumferential runout.

[0065] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. They can refer to a mechanical connection or an electrical connection. They can refer to a direct connection or an indirect connection through an intermediate medium, and they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0066] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0067] The foregoing disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described above. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0068] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with an embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

Claims

1. A detachable rubber roller mechanism, used in a printer, characterized in that, The roller mechanism includes a roller assembly and a roller mounting base. The roller mounting base is fixed to the printer frame, and the roller assembly is detachably mounted on the roller mounting base to drive the printing media and ribbon to move along a preset path. The roller assembly includes an unlocking component, a roller core, and a flexible layer disposed on the outside of the roller core. The roller core has a first shaft head and a second shaft head for transmission connection with the drive mechanism of the printer at both ends. A roller receiving groove is formed on the roller fixing seat. The roller core is rotatably mounted in the roller receiving groove. The unlocking component is mounted on the first shaft head and is used to unlock the roller assembly locked in the roller receiving groove.

2. The rubber roller mechanism according to claim 1, characterized in that, The rubber roller assembly further includes a first bearing component and a second bearing component. The first shaft head is detachably connected to one end of the rubber roller receiving groove via the first bearing component, and the second shaft head is detachably connected to the other end of the rubber roller receiving groove via the second bearing component.

3. The rubber roller mechanism according to claim 2, characterized in that, The rubber roller assembly further includes a first elastic element and a second elastic element. The first elastic element is disposed in the first shaft head to drive the first bearing member to engage with the rubber roller fixing seat, and the second elastic element is disposed in the second shaft head to drive the second bearing member to engage with the rubber roller fixing seat.

4. The rubber roller mechanism according to claim 3, characterized in that, The unlocking component is a press-fit buckle, which is used to engage with the first end of the rubber roller receiving groove to achieve one-way press-unlocking of the rubber roller assembly.

5. The rubber roller mechanism according to claim 2 or 3, characterized in that, The rubber roller assembly further includes a first retaining ring and a second retaining ring. The first bearing component is fixed in the first shaft head by the first retaining ring, and the second bearing component is fixed in the second shaft head by the second retaining ring.

6. The rubber roller mechanism according to claim 2 or 3, characterized in that, The rubber roller receiving groove has a first end and a second end that are arranged opposite to each other. The first shaft head is rotatably mounted on the first end through the first bearing member, and the second shaft head is rotatably mounted on the second end through the second bearing member.

7. The rubber roller mechanism according to claim 1, characterized in that, The second shaft head is provided with a flat structure, and the first gear of the drive mechanism is provided with a locking groove, and the flat structure cooperates with the locking groove.

8. The rubber roller mechanism according to claim 7, characterized in that, The fit tolerance between the locking groove and the flat structure is in the range of -0.05mm to 0.05mm.

9. The rubber roller mechanism according to claim 1, characterized in that, The outer surface of the flexible layer has a textured surface to increase the friction of the printing medium during transmission.

10. A printer, characterized in that, Includes the rubber roller mechanism as described in any one of claims 1 to 9.

Images