A printer paper feed mechanism

Abstract

The utility model relates to printer accessory technology field discloses a kind of printer paper feeding mechanism, including U-shaped frame, and rubber roller rotationally connected in U-shaped frame inside, the upper end of the U-shaped frame is equipped with a group of paper guide roller assembly, the outer side of the rubber roller one end is equipped with driven gear one, the outer side of the U-shaped frame one end is equipped with motor, the output end of the motor is located in the inner side of U-shaped frame and is fixedly connected with driving gear one. In the utility model, the rubber roller rotates in the process, and the driving shaft and the cam are driven to rotate by the engagement transmission of gear three, and the adjusting roller and the movable rod are deformed and moved at the elastic sheet after each rotation of the cam, so that the distance between the front press roller and the rubber roller is dynamically changed, which is beneficial to the smooth running of the paper and reduces the possibility of paper jam; the elastic strip is deformed by adjusting bolt extrusion on the paper guide roller assembly, and the spacing between the paper guide roller and the rubber roller can be adjusted to achieve the purpose of normal paper feeding without paper jam.

Description

Technical Field

[0001] This utility model relates to the field of printer accessories technology, specifically a printer paper feeding mechanism. Background Technology

[0002] Printers are common office equipment in our daily work life, and the quality of their printing largely depends on the performance of the paper feeding mechanism. The paper feeding mechanism is a very important part of the printer, as it directly affects the normal operation of the printer and the printing effect; through the coordinated work of various components, it ensures that the paper can be smoothly fed into the printer.

[0003] Chinese patent discloses a paper feeding mechanism for a printer (authorization announcement number CN205800536U). This patented technology includes a bracket, a paper feeding roller, a roller pressure plate, a spring, and a spring limiting plate. The paper feeding roller is rotatably mounted on the bracket; the spring limiting plate is fixed to the bracket; one end of the spring is connected to the spring limiting plate, and the other end is connected to the roller pressure plate. The roller pressure plate can abut against the paper feeding roller under the elastic force of the spring. This design avoids paper sticking and improves print quality; however, it makes it inconvenient to adjust the paper feed spacing, thus failing to effectively prevent paper jams. Utility Model Content

[0004] The purpose of this invention is to provide a printer paper feeding mechanism to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A printer paper feeding mechanism includes a U-shaped frame and a rubber roller rotatably connected to the inner side of the U-shaped frame. A set of paper guide roller assemblies is installed at the upper end of the U-shaped frame. A driven gear is installed at one end of the outer side of the rubber roller. A motor is installed at one end of the outer side of the U-shaped frame. The output end of the motor is fixedly connected to a driving gear on the inner side of the U-shaped frame. The driving gear meshes with the driven gear. A second drive shaft and a first drive shaft are rotatably connected to the inner side of the U-shaped frame near the front end of the rubber roller. A paper feed chain is installed on both the second and first drive shafts. A second driven gear is installed at one end of the outer side of the second drive shaft. The second driven gear meshes with the driving gear. A movable rod is installed at the upper end of the inner side of the U-shaped frame near the front side of the rubber roller. A set of front pressure rollers is rotatably installed on the movable rod.

[0007] As a further embodiment of this utility model: a rotating shaft is installed on the inner side wall of the U-shaped frame near the rear end of the movable rod, and a driven gear three and a cam are respectively installed on the rotating shaft, and the driven gear three meshes with the driven gear one for transmission.

[0008] As a further improvement of this utility model: an adjusting roller is rotatably installed on the movable rod near the cam position, and elastic plates are installed at the junctions of both ends of the movable rod and the U-shaped frame. Each time the cam rotates once, it squeezes the adjusting roller once, and the adjusting roller and the movable rod deform and move at the elastic plates.

[0009] As a further embodiment of this utility model: the paper guide roller assembly includes a paper guide roller, one end of which is rotatably connected to an elastic strip, a buckle is fixedly connected to the rear side of the upper end of the elastic strip, a fastening bolt is embedded in the rear end of the buckle, and an adjusting bolt is inclinedly provided at the upper end of the buckle.

[0010] As a further improvement of this utility model: the buckle is engaged with the U-shaped frame, and the buckle and the U-shaped frame are fixedly connected by fastening bolts.

[0011] As a further embodiment of this utility model: the lower end of the adjusting bolt is close to the upper end of the elastic strip, and the paper guide roller is located on the rear side of the upper end of the rubber roller.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0013] This invention uses a motor to drive a drive gear, which in turn drives the rotating shaft and cam to rotate together via a three-meshing transmission of the drive gear. Each rotation of the cam causes the adjusting roller and the movable rod to deform and move at the elastic plate, thereby dynamically changing the distance between the front pressure roller and the rubber roller. This facilitates smooth paper feeding and reduces the possibility of paper jams. The adjusting bolts on the guide roller assembly press the elastic strip, causing it to deform and adjust the distance between the guide roller and the rubber roller to achieve normal paper feeding without jamming. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of a printer paper feeding mechanism.

[0015] Figure 2 for Figure 1 A magnified structural diagram of part A in the middle;

[0016] Figure 3 This is a schematic diagram of the paper guide roller assembly in a printer paper feeding mechanism.

[0017] In the diagram: 1. U-shaped frame; 2. Movable rod; 3. Front pressure roller; 4. Paper guide roller assembly; 41. Paper guide roller; 42. Elastic strip; 43. Buckle; 44. Fastening bolt; 45. Adjusting bolt; 5. Paper feed chain; 6. Drive shaft one; 7. Rubber roller; 8. Drive shaft two; 9. Driven gear one; 10. Driven gear two; 11. Motor; 12. Drive gear; 13. Adjusting roller; 14. Cam; 15. Driven gear three; 16. Rotating shaft; 17. Elastic sheet. Detailed Implementation

[0018] Please see Figures 1-3 In this embodiment of the present invention, a printer paper feeding mechanism includes a U-shaped frame 1 and a rubber roller 7 rotatably connected to the inner side of the U-shaped frame 1. A set of paper guide roller assemblies 4 are installed at the upper end of the U-shaped frame 1. A driven gear 9 is installed at one end of the outer side of the rubber roller 7. A motor 11 is installed at one end of the outer side of the U-shaped frame 1. A drive gear 12 is fixedly connected to the output end of the motor 11 on the inner side of the U-shaped frame 1. The drive gear 12 meshes with the driven gear 9 for transmission. A second transmission shaft 8 and a first transmission shaft 6 are rotatably connected to the inner side of the U-shaped frame 1 near the front end of the rubber roller 7. A set of paper feeding belts 5 are installed on the second transmission shaft 8 and the first transmission shaft 6. One end of the second transmission shaft 8 is... A driven gear 10 is installed, which meshes with the driving gear 12. A movable rod 2 is installed on the upper end of the inner side of the U-shaped frame 1 near the front of the rubber roller 7. A set of front pressure rollers 3 are rotatably installed on the movable rod 2. The driving gear 12 is driven to rotate by the motor 11. The driving gear 12 meshes with both the driven gear 9 and the driven gear 10, thereby causing the rubber roller 7 and the drive shaft 8 to rotate simultaneously. The white paper to be printed is placed on the paper feeding chain 5. The paper is fed between the paper feeding chain 5 and the rubber roller 7. After being transported by the rubber roller, the paper comes out between the guide roller assembly 4 and the rubber roller 7, as well as between the front pressure roller 3 and the rubber roller 7.

[0019] exist Figure 1 and Figure 2 In the U-shaped frame 1, a rotating shaft 16 is installed on the inner side wall near the rear end of the movable rod 2. A driven gear 15 and a cam 14 are respectively installed on the rotating shaft 16. The driven gear 15 meshes with the driven gear 9 for transmission. An adjusting roller 13 is rotatably installed on the movable rod 2 near the cam 14. Elastic plates 17 are installed at the junctions of the movable rod 2 and the U-shaped frame 1. During the rotation of the rubber roller 7, the driven gear 9 meshes with the driven gear 15, thereby causing the rotating shaft 16 and the cam 14 to rotate together. Each time the cam 14 rotates, it squeezes the adjusting roller 13 once. The adjusting roller 13 and the movable rod 2 deform and move at the elastic plate 17, thereby dynamically changing the distance between the front pressure roller 3 and the rubber roller 7, which is conducive to the smooth movement of paper and reduces the possibility of paper jams.

[0020] exist Figure 1 and Figure 3In this assembly, the paper guide roller assembly 4 includes a paper guide roller 41. One end of the paper guide roller 41 is rotatably connected to an elastic strip 42. A buckle 43 is fixedly connected to the rear side of the upper end of the elastic strip 42. A fastening bolt 44 is embedded in the rear end of the buckle 43, and an adjusting bolt 45 is inclinedly provided at the upper end of the buckle 43. The buckle 43 is engaged with the U-shaped frame 1, and the buckle 43 and the U-shaped frame 1 are fixedly connected by the fastening bolt 44. Thus, the paper guide roller assembly 4 can be fixed at different positions on the U-shaped frame 1. The lower end of the adjusting bolt 45 is close to the upper end of the elastic strip 42. The paper guide roller 41 is located at the rear side of the upper end of the rubber roller 7. By rotating the adjusting bolt 45, the adjusting bolt 45 squeezes the elastic strip 42, and the elastic strip 42 deforms, thereby adjusting the distance between the paper guide roller 41 and the rubber roller 7 to achieve normal paper feeding without jamming.

[0021] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A printer paper feeding mechanism, comprising a U-shaped frame (1) and a rubber roller (7) rotatably connected to the inner side of the U-shaped frame (1), characterized in that, A set of paper guide roller assemblies (4) is installed at the upper end of the U-shaped frame (1). A driven gear (9) is installed at one end of the outer side of the rubber roller (7). A motor (11) is installed at one end of the outer side of the U-shaped frame (1). The output end of the motor (11) is located on the inner side of the U-shaped frame (1) and a drive gear (12) is fixedly connected thereto. The drive gear (12) meshes with the driven gear (9) for transmission. The inner side of the U-shaped frame (1) near the front end of the rubber roller (7) rotates and connects to the drive gear (9). The U-shaped frame (1) is connected to a second drive shaft (8) and a first drive shaft (6). A set of paper feeding belts (5) are installed on the second drive shaft (8) and the first drive shaft (6). A driven gear (10) is installed on one end of the outer side of the second drive shaft (8). The driven gear (10) meshes with the driving gear (12). A movable rod (2) is installed on the upper end of the inner side of the U-shaped frame (1) near the front side of the rubber roller (7). A set of front pressure rollers (3) is rotatably installed on the movable rod (2).

2. The printer paper feeding mechanism according to claim 1, characterized in that, A rotating shaft (16) is installed on the inner side wall of the U-shaped frame (1) near the rear end of the movable rod (2). A driven gear three (15) and a cam (14) are respectively installed on the rotating shaft (16). The driven gear three (15) meshes with the driven gear one (9) for transmission.

3. The printer paper feeding mechanism according to claim 2, characterized in that, An adjusting roller (13) is rotatably mounted on the movable rod (2) near the cam (14). Elastic plates (17) are installed at the junctions of the two ends of the movable rod (2) and the U-shaped frame (1). Each time the cam (14) rotates, it squeezes the adjusting roller (13) once. The adjusting roller (13) and the movable rod (2) deform and move at the elastic plate (17).

4. The printer paper feeding mechanism according to claim 1, characterized in that, The paper guide roller assembly (4) includes a paper guide roller (41), one end of which is rotatably connected to an elastic strip (42). A buckle (43) is fixedly connected to the rear side of the upper end of the elastic strip (42). A fastening bolt (44) is embedded in the rear end of the buckle (43), and an adjusting bolt (45) is inclinedly provided at the upper end of the buckle (43).

5. A printer paper feeding mechanism according to claim 4, characterized in that, The buckle (43) is engaged on the U-shaped frame (1), and the buckle (43) and the U-shaped frame (1) are fixedly connected by fastening bolts (44).

6. A printer paper feeding mechanism according to claim 4, characterized in that, The lower end of the adjusting bolt (45) is close to the upper end of the elastic strip (42), and the paper guide roller (41) is located on the rear side of the upper end of the rubber roller (7).

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