A platen roller assembly for a printer
By designing a synchronously controlled pressure roller assembly in the printer, and utilizing the cooperation between the square shaft and the lifting pressure component, the problem of cumbersome operation of multiple pressure rollers is solved, achieving the effects of simplifying paper changing and improving print quality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG LANBIAO DIGITAL PRINTING TECHNOLOGY CO LTD
- Filing Date
- 2025-09-28
- Publication Date
- 2026-07-07
AI Technical Summary
The multi-pressure roller structure of existing printers is cumbersome to operate and makes it difficult to achieve synchronous lifting and pressing of multiple pressure rollers, resulting in paper misalignment, paper jams, or uneven pressure in the printing area, which affects print quality.
Design a paper pressing roller assembly that uses a square shaft that runs through all paper pressing devices and cooperates with the pressing components. By rotating the square shaft, all paper pressing rollers can be synchronously controlled, simplifying operation and enabling one-button paper changing.
It achieves synchronous lifting and pressing of multiple pressure rollers, simplifies paper changing operations, improves efficiency, avoids paper jams and paper feeding skew problems, and improves print quality.
Smart Images
Figure CN224465519U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printer technology, and more specifically, to a paper pressure roller assembly for a printer. Background Technology
[0002] The description in this section provides only background information related to the disclosure of this utility model and does not constitute prior art.
[0003] In existing technologies, printers typically employ multiple pressure rollers arranged side-by-side to press the paper firmly during printing, ensuring smooth paper feed and clear prints. However, existing multi-pressure roller structures present operational inconveniences. When installing or changing paper, users often need to manually lift each pressure roller individually, a cumbersome and time-consuming process, especially in multi-roller wide-format printers. Furthermore, manual operation makes it difficult to ensure the synchronicity and consistency of all pressure roller lifting. If the pressure rollers are not fully and evenly pressed down after paper is loaded, it can easily lead to paper misalignment, paper jams, or uneven pressure in the printing area, affecting print quality. Therefore, there is a need to invent a paper pressure roller assembly that can reliably achieve synchronized lifting of multiple pressure rollers to solve the operational problems of existing technologies.
[0004] It should be noted that the above introduction to the technical background is only for the purpose of providing a clear and complete explanation of the technical solutions of this utility model and facilitating understanding by those skilled in the art. It should not be assumed that these technical solutions are known to those skilled in the art simply because they have been described in the background section of this utility model. Summary of the Invention
[0005] The technical problem to be solved by this utility model is to provide a paper pressure roller assembly for a printer.
[0006] To solve the above-mentioned technical problems, this utility model provides a paper pressure roller assembly for a printer. The paper pressure roller assembly includes multiple paper lifting and pressing devices arranged side by side, and a paper feed shaft located below the paper lifting and pressing devices. Each paper lifting and pressing device includes a lifting roller, and the paper to be printed passes between the paper feed shaft and the lifting roller. The paper lifting and pressing device also includes a mounting frame and a lifting plate rotatably connected to the mounting frame via a rotating shaft. The lifting roller is installed on the front side of the lifting plate. When the paper needs to be printed, the lifting roller presses on the upper surface of the paper, and the paper is driven to move by the paper feed shaft. When the paper needs to be installed or removed, the lifting plate rotates along the rotating shaft, causing the lifting roller to be lifted.
[0007] Preferably, the paper pressure roller assembly further includes a frame, on which a square shaft is mounted. The paper lifting device further includes a lifting member rotatably mounted on the mounting frame. The lifting member has a square hole matching the square shaft and a lifting part whose lower end abuts against the upper surface of the lifting plate. The contact positions of the lifting plate and the lifting part are located on both sides of the rotating shaft, respectively, as are the lifting rollers. The square shaft passes through multiple square holes of the paper lifting device in sequence. When the square shaft rotates in one direction, the lifting part presses down on the lifting plate, and the lifting rollers on the other side of the rotating shaft lift up. When the square shaft rotates in the opposite direction, the lifting part lifts up, and the lifting rollers on the other side of the rotating shaft press down on the upper surface of the printed paper under their own weight.
[0008] Preferably, the rotating shaft is mounted on the frame in a rotatable manner with pre-tightened friction, and there is a preset clamping force on the mating surface between the rotating shaft and the frame, and the resulting frictional force constitutes the angle holding force of the rotating shaft.
[0009] Preferably, the square shaft is a hexagonal shaft, and the square hole is a hexagonal hole.
[0010] Preferably, each of the paper lifting and pressing devices includes three lifting rollers.
[0011] Preferably, the pressure roller assembly further includes a drive wheel for driving the paper feed shaft to rotate and a drive motor for driving the drive wheel to rotate.
[0012] Preferably, the pressure roller assembly further includes a printing area, and the paper feed shaft and the paper lifting device are located at the rear side of the printing area.
[0013] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0014] This invention relates to a paper pressure roller assembly for a printer. It achieves synchronous control of the state of all paper pressure rollers by cooperating with a lifting member containing a lifting pressure section through a square shaft that runs through all paper lifting devices. When the square shaft is rotated, it drives the lifting pressure section to press down or release the lifting pressure plate, thereby causing the lifting pressure rollers located on the other side of the shaft to lift or fall synchronously. This simplifies paper changing operations, enabling convenient "one-button" paper changing, improving efficiency, and avoiding paper jams or skewed paper feed caused by asynchronous roller movements. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the paper pressure roller assembly of this utility model.
[0016] Figure 2 This is a schematic diagram of the paper pressure roller assembly of this utility model.
[0017] Figure 3 This is a schematic diagram of the structure of multiple paper lifting and pressing devices of this utility model.
[0018] Figure 4 This is a schematic diagram of the paper lifting and pressing device of this utility model.
[0019] Figure 5 This is a schematic diagram of the paper lifting and pressing device of this utility model.
[0020] Figure 6 yes Figure 2 A magnified view of a portion of the image.
[0021] The components are: 1. Paper lifting and pressing device; 2. Square shaft; 3. Drive wheel; 4. Paper feed shaft; 5. Printing area; 6. Frame; 7. Drive motor; 11. Lifting roller; 12. Lifting plate; 13. Mounting frame; 14. Rotary shaft; 15. Lifting component; 16. Square hole; 17. Lifting part. Detailed Implementation
[0022] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0023] It should be noted that in the description of this utility model, the terms "first," "second," etc., are used only for descriptive purposes and to distinguish similar objects; there is no order between them, nor should they be construed as indicating or implying relative importance. Furthermore, in the description of this utility model, unless otherwise stated, "a plurality of" means two or more.
[0024] like Figure 1-2 As shown, this utility model provides a paper pressure roller assembly for a printer, the paper pressure roller assembly including multiple paper lifting and pressing devices 1 arranged side by side, and a paper feed shaft 4 located below the paper lifting and pressing devices 1. Figure 3-6 As shown, the paper lifting and pressing device 1 includes a lifting roller 11. The paper to be printed passes between the paper feed shaft 4 and the lifting roller 11. The paper lifting and pressing device 1 also includes a mounting frame 13 and a lifting plate 12 rotatably connected to the mounting frame 13 via a rotating shaft 14. The lifting roller 11 is installed on the front side of the lifting plate 12. When the paper needs to be printed, the lifting roller 11 presses on the upper surface of the paper, and the paper is driven to move by the paper feed shaft 4. When the paper needs to be installed or removed, the lifting plate 12 rotates along the rotating shaft 14, causing the lifting roller 11 to be lifted.
[0025] like Figure 1-2 As shown, the paper pressure roller assembly also includes a frame 6, on which a square shaft 2 is mounted. The paper lifting and pressing device 1 also includes a lifting member 15 rotatably mounted on the mounting frame 13. The lifting member 15 has a square hole 16 that matches the square shaft 2 and a lifting part 17 whose lower end abuts against the upper surface of the lifting plate 12. The position where the lifting plate 12 contacts the lifting part 17 and the lifting roller 11 are respectively located on both sides of the rotating shaft 14. The square shaft 2 passes through multiple square holes 16 of the paper lifting and pressing device 1 in sequence. When the square shaft 2 rotates in one direction, the lifting part 17 presses down on the lifting plate 12, and the lifting roller 11 located on the other side of the rotating shaft 14 is lifted. When the square shaft 2 rotates in the opposite direction, the lifting part 17 is lifted, and the lifting roller 11 located on the other side of the rotating shaft 14 is pressed down on the upper surface of the paper being printed under its own weight. The rotating shaft 14 is rotatably mounted on the frame 6 via a pre-tensioned friction mechanism. A preset clamping force exists between the rotating shaft 14 and the frame 6, and the resulting friction constitutes the angle-holding force of the rotating shaft 14. The paper pressure roller assembly also includes a printing area 5, with the paper feed shaft 4 and the paper lifting and pressing device 1 located behind the printing area 5.
[0026] In a preferred embodiment, the square shaft 2 is a hexagonal shaft, and the square hole 16 is a hexagonal hole. Each of the paper lifting and pressing devices 1 includes three lifting and pressing rollers 11. The paper pressing roller assembly also includes a drive wheel 3 for driving the paper feed shaft 4 to rotate, and a drive motor 7 for driving the drive wheel 3 to rotate.
[0027] This invention relates to a paper pressure roller assembly for a printer. A square shaft 2, running through all the paper lifting devices 1, cooperates with a lifting member 15 equipped with a lifting section 17, enabling synchronous control of the state of all paper pressure rollers. When the square shaft 2 is rotated, it drives the lifting section 17 to press down or release the lifting plate 12, thereby causing the lifting roller 11 located on the other side of the rotating shaft 14 to lift or fall synchronously. This simplifies paper changing operations, enabling convenient "one-button" paper changing, improving efficiency, and avoiding paper jams or skewed paper feed caused by asynchronous roller movements.
[0028] The above-described embodiments are merely preferred embodiments provided to fully illustrate the present invention, and the scope of protection of the present invention is not limited thereto. Equivalent substitutions or modifications made by those skilled in the art based on the present invention are all within the scope of protection of the present invention. The scope of protection of the present invention is defined by the claims.
Claims
1. A paper pressure roller assembly for a printer, characterized in that, The paper pressure roller assembly includes multiple paper lifting and pressing devices arranged side by side, and a paper feed shaft located below the paper lifting and pressing devices. The paper lifting and pressing devices include lifting rollers, and the paper to be printed passes between the paper feed shaft and the lifting rollers. The paper lifting and pressing device further includes a mounting frame and a lifting plate rotatably connected to the mounting frame via a rotating shaft. The lifting roller is installed on the front side of the lifting plate. When the paper needs to be printed, the lifting roller presses on the upper surface of the paper, and the paper is driven to move by the paper feed shaft. When the paper needs to be installed or removed, the lifting plate rotates along the rotating shaft, causing the lifting roller to lift.
2. The paper pressure roller assembly for a printer according to claim 1, characterized in that, The paper pressure roller assembly further includes a frame on which a square shaft is mounted. The paper lifting device further includes a lifting member rotatably mounted on the mounting frame. The lifting member has a square hole that matches the square shaft and a lifting portion whose lower end abuts against the upper surface of the lifting plate. The contact points between the lifting plate and the lifting part are located on both sides of the rotating shaft, as are the lifting roller. The square shaft passes through the square holes of multiple paper lifting devices in sequence. When the square shaft rotates in one direction, the lifting part presses down on the lifting plate, and the lifting roller on the other side of the shaft lifts up. When the square shaft rotates in the opposite direction, the lifting part lifts up, and the lifting roller on the other side of the shaft presses down on the upper surface of the paper being printed under its own weight.
3. A paper pressure roller assembly for a printer according to claim 2, characterized in that, The rotating shaft is mounted on the frame in a rotatable manner with pre-tightened friction. There is a preset clamping force on the mating surface between the rotating shaft and the frame, and the resulting frictional force constitutes the angle holding force of the rotating shaft.
4. A paper pressure roller assembly for a printer according to claim 3, characterized in that, The square shaft is a hexagonal shaft, and the square hole is a hexagonal hole.
5. A paper pressure roller assembly for a printer according to claim 4, characterized in that, Each of the aforementioned paper-lifting devices includes three lifting rollers.
6. A paper pressure roller assembly for a printer according to claim 1, characterized in that, The paper pressure roller assembly also includes a drive wheel for driving the paper feed shaft to rotate and a drive motor for driving the drive wheel to rotate.
7. A paper pressure roller assembly for a printer according to claim 1, characterized in that, The paper pressure roller assembly also includes a printing area, and the paper feed shaft and the paper lifting device are located at the rear side of the printing area.