Paper feeding device of printing equipment
By introducing a paper feeding device consisting of a first feed roller, a second feed roller, and a swing roller into the printing equipment, and utilizing a swing arm and tension spring structure to achieve constant paper tension adjustment, the problems of print quality and positioning offset are solved, and stable paper feeding and high-precision printing are achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-06-16
- Publication Date
- 2026-03-31
AI Technical Summary
Existing printing equipment's paper feeding mechanism struggles to dynamically adjust paper tension, leading to print quality defects, positioning misalignment, and paper breakage risks. This is especially pronounced during high-precision printing and continuous operation. Furthermore, existing tension adjustment solutions are either slow to respond or have complex structures.
A paper feeding device including a first conveying roller, a second conveying roller, and a swing roller is adopted. The constant tension of the paper is adjusted by the swing roller on the first and second swing rods and the first and second tension springs. Combined with a position sensor and a drive motor, the paper is kept taut in the printing area.
It effectively prevents wrinkles and positioning misalignment during printing, protects paper integrity, prevents paper breaks, achieves stable paper feeding and high-quality printing, and adapts to changes in paper roll diameter.
Smart Images
Figure CN224060712U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of printing technology, and more specifically, to a paper feeding device for a printing apparatus. 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 printing equipment, the traditional fixed roller group structure is difficult to dynamically adjust the paper tension, which often leads to printing quality defects (such as wrinkles, positioning misalignment), paper breakage risk, and inability to adapt to changes in roll diameter. This is especially evident in high-precision printing and continuous operation. Existing tension adjustment schemes generally suffer from response lag or complex structures. There is an urgent need to develop a paper feeding device that can automatically maintain constant tension in real time and has a simple and reliable structure to solve these technical bottlenecks.
[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 feeding device for a printing equipment.
[0006] To solve the above-mentioned technical problems, this utility model provides a paper feeding device for a printing equipment. The paper feeding device includes a first conveying roller, a second conveying roller, and a swing roller arranged parallel to each other. The paper feeding device also includes a first swing rod and a second swing rod that rotate around a rotating axis and are parallel to each other. The swing roller is mounted on the first swing rod and the second swing rod. The rotating axis is parallel to the swing roller. The paper feeding device also includes a first tension spring and a second tension spring. One end of the first tension spring is fixedly mounted on the first swing rod, and the other end is fixed to the printing equipment. One end of the second tension spring is fixedly mounted on the second swing rod, and the other end is fixed to the printing equipment. The first tension spring and the second tension spring are used to pull the first swing rod and the second swing rod backward, respectively, so that the swing roller swings backward along the rotating axis. After the roll of paper from the paper feed roller comes out, it passes around the first conveying roller, the second conveying roller, and the swing roller before entering the printing area.
[0007] Preferably, the paper feeding device further includes the paper feeding roller, a drive motor for driving the paper feeding roller to rotate and feed paper, and a printing area located in front of the swing roller. The printing area includes a drive mechanism for pulling the paper forward.
[0008] Preferably, the paper feeding device further includes a first mounting plate and a second mounting plate arranged opposite to each other on the left and right sides. The left and right ends of the first conveying roller are rotatably mounted on the first mounting plate and the second mounting plate, respectively. The left and right ends of the second conveying roller are rotatably mounted on the first mounting plate and the second mounting plate, respectively. The first swing arm and the second swing arm are rotatably mounted on the first mounting plate and the second mounting plate, respectively, via a rotating shaft. One end of the first tension spring is fixed to the first swing arm, and the other end is fixed to the first mounting plate. One end of the second tension spring is fixed to the second swing arm, and the other end is fixed to the second mounting plate.
[0009] Preferably, the paper feeding device further includes a first fixed plate and a second fixed plate, and the first conveying roller and the second conveying roller pass through the first fixed plate and the second fixed plate in sequence.
[0010] Preferably, the first fixed plate is provided with a first limiting member and a second limiting member, and the first swing arm is movable between the first limiting member and the second limiting member; the second fixed plate is provided with a third limiting member and a fourth limiting member, and the second swing arm is movable between the third limiting member and the fourth limiting member.
[0011] Preferably, a position sensor is also provided on the first or second fixed plate. When the first or second swing arm moves to the foremost position, the position sensor is triggered. When the position sensor is triggered, the drive motor of the paper feeding roller drives the paper feeding roller to rotate and feed out a section of paper. The first and second swing arms move backward under the pull of the first and second tension springs, respectively.
[0012] Preferably, a first fixing part is installed at the rear side of the first swing arm, a second fixing part is provided on the first mounting plate, a third fixing part is installed at the rear side of the second swing arm, a fourth fixing part is provided on the second mounting plate, one end of the first tension spring is connected to the first fixing part, the other end of the first tension spring is connected to the second fixing part, one end of the second tension spring is connected to the third fixing part, and the other end of the second tension spring is connected to the fourth fixing part.
[0013] Preferably, the paper feeding device further includes a third conveying roller, the two ends of which are rotatably mounted on the first fixed plate and the second fixed plate, respectively, and the third conveying roller passes through the first mounting plate and the second mounting plate in sequence.
[0014] Based on the above technical solution, the beneficial effects of this utility model are as follows:
[0015] The paper feeding device of this invention features a swing roller mounted on a swingable first and second swing arm. A first and second tension spring apply backward tension to maintain the paper tension between the swing roller and the printing area. This structure effectively prevents wrinkles during printing, improving print quality (e.g., barcodes, QR codes). It also maintains paper positioning accuracy, preventing print position shifts due to slack. During rapid paper feeding, the tension springs adjust tension instantly to prevent sudden changes in tension and protect the paper's integrity. Furthermore, this structure automatically compensates for tension fluctuations caused by changes in paper roll diameter during extended operation, achieving stable and reliable continuous printing. Attached Figure Description
[0016] Figure 1 This is a schematic diagram of the paper feeding device of this utility model.
[0017] Figure 2 This is a schematic diagram of the paper feeding device of this utility model.
[0018] Figure 3 This is a schematic diagram of the paper feeding device of this utility model in its first state.
[0019] Figure 4 This is a schematic diagram of the paper feeding device of this utility model in its second state.
[0020] Wherein: 1. Swing roller; 2. First conveying roller; 3. Second conveying roller; 4. Third conveying roller; 5. First fixed plate; 6. Second fixed plate; 7. First mounting plate; 8. Second mounting plate; 9. First swing arm; 10. Second swing arm; 11. First tension spring; 12. Second tension spring; 13. First limiting member; 14. Second limiting member; 15. First fixing part; 16. Second fixing part; 91. Rotating shaft; 100. Paper feeding roller. Detailed Implementation
[0021] 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.
[0022] 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.
[0023] like Figure 1-4 As shown, this utility model provides a paper feeding device for a printing equipment. The paper feeding device includes a first conveying roller 2, a second conveying roller 3, and a swing roller 1 arranged parallel to each other. The paper feeding device also includes a first swing rod 9 and a second swing rod 10 that rotate around a rotating shaft 91 and are parallel to each other. The swing roller 1 is mounted on the first swing rod 9 and the second swing rod 10. The rotating shaft 91 is parallel to the swing roller 1. The paper feeding device also includes a first tension spring 11 and a second tension spring 12. One end of the first tension spring 11 is fixedly mounted on the first swing rod 9, and the other end is fixed to the printing equipment. One end of the second tension spring 12 is fixedly mounted on the second swing rod 10, and the other end is fixed to the printing equipment. The first tension spring 11 and the second tension spring 12 are used to pull the first swing rod 9 and the second swing rod 10 backward, respectively, so that the swing roller 1 swings backward along the rotating shaft 91. After the roll of paper from the paper feed roller 100 comes out, it passes around the first conveying roller 2, the second conveying roller 3, and the swing roller 1 and enters the printing area. The paper feeding device further includes the paper feeding roller 100, a drive motor for driving the paper feeding roller 100 to rotate and feed paper, and a printing area located in front of the swing roller 1. The printing area includes a drive mechanism for pulling the paper forward. In this invention's paper feeding device, the swing roller 1 is mounted on a swingable first swing arm 9 and a second swing arm 10, and a first tension spring 11 and a second tension spring 12 apply a backward tension force to keep the paper between the swing roller 1 and the printing area taut. This structure effectively prevents wrinkles during printing, improving printing quality (such as barcodes and QR codes); it also maintains paper positioning accuracy, preventing printing position shifts due to slack. When feeding paper quickly, the tension springs can also adjust the tension instantly to prevent sudden changes in tension from causing paper breakage, protecting the paper's integrity. Furthermore, this structure can automatically compensate for tension fluctuations caused by changes in paper roll diameter during long-term operation, achieving stable and reliable continuous printing.
[0024] The paper feeding device further includes a first mounting plate 7 and a second mounting plate 8 arranged opposite each other. The left and right ends of the first conveying roller 2 are rotatably mounted on the first mounting plate 7 and the second mounting plate 8, respectively. The left and right ends of the second conveying roller 3 are rotatably mounted on the first mounting plate 7 and the second mounting plate 8, respectively. The first swing arm 9 and the second swing arm 10 are rotatably mounted on the first mounting plate 7 and the second mounting plate 8, respectively, via a rotating shaft 91. One end of the first tension spring 11 is fixed to the first swing arm 9, and the other end is fixed to the first mounting plate 7. One end of the second tension spring 12 is fixed to the second swing arm 10, and the other end is fixed to the second mounting plate 8. The paper feeding device also includes a first fixed plate 5 and a second fixed plate 6, through which the first conveying roller 2 and the second conveying roller 3 pass sequentially.
[0025] The first fixed plate 5 is provided with a first limiting member 13 and a second limiting member 14, and the first swing rod 9 can move between the first limiting member 13 and the second limiting member 14; the second fixed plate 6 is provided with a third limiting member and a fourth limiting member, and the second swing rod 10 can move between the third limiting member and the fourth limiting member. A position sensor is also provided on the first fixed plate 5 or the second fixed plate 6. When the first swing rod 9 or the second swing rod 10 moves to the foremost position, the position sensor is triggered. When the position sensor is triggered, the drive motor of the paper feeding roller 100 drives the paper feeding roller 100 to rotate, dispensing a section of paper. The first swing rod 9 and the second swing rod 10 move backward under the pull of the first tension spring 11 and the second tension spring 12, respectively.
[0026] A first fixing part 15 is installed at the rear side of the first swing arm 9, a second fixing part 16 is provided on the first mounting plate 7, a third fixing part is installed at the rear side of the second swing arm 10, a fourth fixing part is provided on the second mounting plate 8, one end of the first tension spring 11 is connected to the first fixing part 15, the other end of the first tension spring 11 is connected to the second fixing part 16, one end of the second tension spring 12 is connected to the third fixing part, and the other end of the second tension spring 12 is connected to the fourth fixing part.
[0027] In a preferred embodiment, the paper feeding device further includes a third conveying roller 4, whose two ends are rotatably mounted on the first fixed plate 5 and the second fixed plate 6, respectively. The third conveying roller 4 passes sequentially through the first mounting plate 7 and the second mounting plate 8. The main function of the third conveying roller 4 is to cooperate with the first and second conveying rollers 3 to form a more optimized paper conveying path. This disperses the total paper tension to multiple contact points, avoids local stress concentration, and improves conveying stability.
[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 feeding device of a printing device, characterized in that, the paper feeding device comprises a first conveying roller, a second conveying roller and a swing roller arranged in parallel, the paper feeding device further comprises a first swing rod and a second swing rod arranged in parallel and rotating around a rotating shaft, the swing roller is installed on the first swing rod and the second swing rod, and the rotating shaft is parallel to the swing roller, the paper feeding device further comprises a first tension spring and a second tension spring, one end of the first tension spring is fixedly installed on the first swing rod, and the other end is fixedly installed on the printing device; one end of the second tension spring is fixedly installed on the second swing rod, and the other end is fixedly installed on the printing device, the first tension spring and the second tension spring are used to pull the first swing rod and the second swing rod backward respectively, so that the swing roller swings backward along the rotating shaft, the paper of the printing device passes through the first conveying roller, the second conveying roller and the swing roller in sequence after being discharged from a paper discharge roller and enters a printing area.
2. The paper advancing device according to claim 1, characterized in that the paper feeding device further comprises the paper discharge roller, a driving motor for driving the paper discharge roller to rotate and discharge paper, and a printing area located in front of the swing roller, the printing area comprises a driving mechanism for pulling the paper to move forward.
3. The paper advancing device of claim 2, wherein the paper feeding device further comprises a first mounting plate and a second mounting plate arranged oppositely, the left and right ends of the first conveying roller are rotatably installed on the first mounting plate and the second mounting plate respectively; the left and right ends of the second conveying roller are rotatably installed on the first mounting plate and the second mounting plate respectively; the first swing rod and the second swing rod are rotatably installed on the first mounting plate and the second mounting plate through the rotating shaft respectively, one end of the first tension spring is fixedly installed on the first swing rod, and the other end is fixedly installed on the first mounting plate, one end of the second tension spring is fixedly installed on the second swing rod, and the other end is fixedly installed on the second mounting plate.
4. The paper advancing device of claim 3, wherein the paper feeding device further comprises a first fixed plate and a second fixed plate, and the first conveying roller and the second conveying roller pass through the first fixed plate and the second fixed plate in sequence.
5. The paper advancing device of claim 4, wherein the first fixed plate is provided with a first limiting piece and a second limiting piece, and the first swing rod can move between the first limiting piece and the second limiting piece; the second fixed plate is provided with a third limiting piece and a fourth limiting piece, and the second swing rod can move between the third limiting piece and the fourth limiting piece.
6. The paper advancing apparatus according to claim 5, wherein the first fixed plate or the second fixed plate is further provided with a position sensor, when the first swing rod or the second swing rod moves to the most front position, the position sensor is triggered, when the position sensor is triggered, the driving motor of the paper discharge roller drives the paper discharge roller to rotate and discharge a section of paper, and the first swing rod and the second swing rod move backward under the pulling of the first tension spring and the second tension spring respectively.
7. The paper advancing device of claim 6, wherein The first swing rod is provided with a first fixed part at the rear side position, the first mounting plate is provided with a second fixed part, the second swing rod is provided with a third fixed part at the rear side position, the second mounting plate is provided with a fourth fixed part, one end of the first tension spring is connected to the first fixed part, the other end of the first tension spring is connected to the second fixed part, one end of the second tension spring is connected to the third fixed part, and the other end of the second tension spring is connected to the fourth fixed part.
8. The paper advancing apparatus according to claim 4, wherein The paper feeding device further comprises a third conveying roller, both ends of the third conveying roller are rotatably mounted on the first fixed plate and the second fixed plate, and the third conveying roller sequentially passes through the first mounting plate and the second mounting plate.