Paper feeding device of laser printer

Abstract

The invention discloses a paper feeding device of a laser printer, relates to the technical field of paper feeding of laser printers, and solves the problems that in the prior art, when a paper feeding device of a laser printer is used for feeding paper, the paper is prone to being clamped or multiple pieces of paper are fed at the same time, the paper feeding device comprises a paper box, and a bearing plate is hinged to the inner wall of the paper box; the bottom of the paper box is fixedly connected with a first motor, and the inner wall of the bottom of the paper box is rotationally connected with a threaded rod. When the pickup roller conveys paper, the paper pickup force of the pickup roller is accurately controlled, so that the paper is stably conveyed to a printing area in a printer from a paper box, the printing speed is improved, and the probability that the paper is stuck and damaged in the conveying process and multiple pieces of paper are conveyed at the same time is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of laser printer paper feeding, and more specifically to a laser printer paper feeding device. Background Art

[0002] A laser printer is a device that uses laser technology to print. One of its core components is the internal paper feeding device, which is responsible for taking the paper out of the paper box and feeding it to the printing position. In the working process of the laser printer, the paper feeding device plays a vital role. The paper feeding device in the prior art squeezes and pulls the stacked paper in the paper box to the printing position in the printer through a rotating paper pickup wheel. However, in this process, the paper is prone to jamming or multiple sheets are fed in at the same time. In view of this, we propose a laser printer paper feeding device. Summary of the invention

[0003] The object of the present invention is to provide a laser printer paper feeding device, aiming to solve the problems of the laser printer paper feeding device in the prior art when feeding paper, such as paper jam or multiple sheets being fed in at the same time.

[0004] To solve the above technical problems, the present invention provides the following technical solutions: A laser printer paper feeding device comprises a paper box, the inner wall of the paper box is hinged with a carrying plate, the bottom of the paper box is fixedly connected with a first motor, the bottom inner wall of the paper box is rotatably connected with a threaded rod, the main shaft of the first motor passes through the bottom inner wall of the paper box to the inside thereof and is fixedly connected to the bottom of the threaded rod, the threaded rod is sleeved with a push tube threadedly connected thereto, a slide plate is fixedly connected between the tops of the push tubes, the top of the slide plate is provided with a symmetrically arranged push rod, one end of the push rod passes through the slide plate and is slidably connected to the penetrated portion, the bottom of the carrying plate is slidably connected with a slider, the other end of the slider is hinged with the top of the push rod, the outer wall of the push rod is sleeved with a load-bearing pressure spring, the two ends of the load-bearing pressure spring are respectively abutted against the top of the slide plate and the bottom of the slider, and a paper rubbing mechanism for rubbing the stacked paper apart and conveying it to the printing position inside the printer is provided inside the paper box.

[0005] Preferably, the paper picking mechanism includes an inclined paper output paper board, which is fixedly connected to the inner wall of the paper box, the inner wall of the paper box is fixedly connected to a storage cover, the outer wall of the paper box is fixedly connected to a second motor, the main shaft of the second motor passes through the paper box and the storage cover to the inside of the storage cover, the top inner wall of the storage cover is fixedly connected to a pressure sensor electrically connected to the first motor, the other end of the pressure sensor is fixedly connected to a fixing frame, the fixing frame and the inner wall of the fixing frame are rotatably connected to a paper picking wheel, and one end of the main shaft of the second motor passes through the storage cover, passes through the fixing frame and is fixedly connected to the rotating shaft of the paper picking wheel.

[0006] Preferably, the inner end wall of the fixed cover is provided with a symmetrically arranged limit groove, the inner wall of the limit groove is slidably connected to the limit block, the bottom of the limit block is fixedly connected to an adjusting pressure spring, the other end of the adjusting pressure spring is fixedly connected to the bottom inner wall of the limit groove, the inner wall of the storage cover is rotatably connected to a lower clamping roller, the outer wall of the limit block is hinged with an eccentric wheel through a torsion spring, the other end of the eccentric wheel is hinged with an upper clamping roller through a torsion spring, the outer wall of the main shaft of the second motor is fixedly connected to a smooth ratchet, the smooth ratchet and the rotating shaft of the upper clamping roller are synchronously rotated connected by an elastic belt, a paper feeding and paper returning channel for paper passing through is formed between the upper clamping roller and the lower clamping roller, the inner wall of the storage cover is fixedly connected to an arc-shaped push plate that fits the outer wall of the eccentric wheel, and the outer wall of the eccentric wheel is fixedly connected to a baffle rod.

[0007] Preferably, a paging device made of rubber material is fixedly connected to the top of the paper board.

[0008] Preferably, a photoelectric sensor is provided on the inner wall of the paper box, and the photoelectric sensor is electrically connected to the second motor.

[0009] Preferably, a symmetrically arranged paper baffle is fixedly connected to the top of the carrying plate.

[0010] Preferably, one end of the paperboard outputting plate close to the supporting plate is arc-shaped.

[0011] Preferably, the upper clamping roller and the lower clamping roller are both made of rubber.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The present invention provides a bearing plate, a threaded rod, a push tube, a slide plate, a push rod, a slider, a load-bearing pressure spring, a paper output board, a storage cover, a pressure sensor, a fixing frame, and a paper pickup wheel, so that when the paper pickup wheel is conveying paper, the force of the paper pickup wheel rubbing the paper can be accurately controlled, so that the paper can be smoothly conveyed from the paper box to the printing area in the printer, thereby improving the printing speed and reducing the probability of the paper being stuck, damaged, and conveying multiple sheets at the same time during the conveying process.

[0014] 2. The present invention also detects the transmission status of the paper in real time through the photoelectric sensor and the paper pickup wheel, and when the paper is stuck or multiple sheets are conveyed at the same time, the paper is corrected in the reverse direction, thereby reducing the frequency of repair and replacement of parts, thereby reducing maintenance costs.

[0015] 3. The present invention also assists in correcting the paper when it is reversed by providing a limit groove, a limit block, an adjusting pressure spring, a lower clamp, an eccentric wheel, and an upper clamp roller, thereby preventing multiple sheets of paper conveyed simultaneously from being unable to be reversed simultaneously, which would cause residual paper to affect the paper conveying during subsequent paper feeding. In addition, during the auxiliary correction process, the paper is squeezed flat to prevent the paper from getting wrinkled and getting stuck during feeding due to wrinkles when the paper is fed again, thereby increasing the probability of damage. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the present invention;

[0017] Figure 2 is a first cross-sectional view of the paper box of the present invention;

[0018] Figure 3 is a second cross-sectional view of the paper box of the present invention;

[0019] Figure 4 for Figure 3 A local enlarged view of point A in FIG.

[0020] Figure 5 is a cross-sectional view of the storage cover of the present invention;

[0021] Figure 6 It is a schematic diagram of the structure of the limiting groove in the present invention.

[0022] Description of the numbers in the figure:

[0023] 1. Paper box; 2. Loading plate; 3. First motor; 4. Threaded rod; 5. Push tube; 6. Slide plate; 7. Push rod; 8. Slider; 9. Load-bearing pressure spring; 10. Paper board; 11. Storage cover; 12. Second motor; 13. Pressure sensor; 14. Fixed frame; 15. Paper pickup wheel; 16. Limiting groove; 17. Limiting block; 18. Adjusting pressure spring; 19. Lower clamping roller; 20. Eccentric wheel; 21. Upper clamping roller; 22. Smooth ratchet; 23. Push plate; 24. Stop rod; 25. Paginator; 26. Photoelectric sensor; 27. Paper board stop. DETAILED DESCRIPTION

[0024] like Figures 1 to 6 As shown, the present invention relates to a laser printer paper feeding device, comprising a paper box 1, a carrying plate 2 is hingedly connected to the inner wall of the paper box 1, a first motor 3 is fixedly connected to the bottom of the paper box 1, a threaded rod 4 is rotatably connected to the inner wall of the bottom of the paper box 1, a main shaft of the first motor 3 penetrates the inner wall of the bottom of the paper box 1 to the inside thereof and is fixedly connected to the bottom of the threaded rod 4, a push tube 5 threadedly connected to the threaded rod 4 is sleeved on the threaded rod 4, a slide plate 6 is fixedly connected between the tops of the push tubes 5, a symmetrically arranged push rod 7 is arranged on the top of the slide plate 6, one end of the push rod 7 penetrates the slide plate 6 and is slidably connected to the penetrated part, a slider 8 is slidably connected to the bottom of the carrying plate 2, the other end of the slider 8 is hinged to the top of the push rod 7, a load-bearing pressure spring 9 is sleeved on the outer wall of the push rod 7, the two ends of the load-bearing pressure spring 9 are respectively abutted against the top of the slide plate 6 and the bottom of the slider 8, and a paper rubbing mechanism for rubbing the stacked paper apart and conveying it to the printing position inside the printer is arranged inside the paper box 1;

[0025] The paper pickup mechanism includes an inclined paper board 10, which is fixedly connected to the inner wall of the paper box 1, and a storage cover 11 is fixedly connected to the inner wall of the paper box 1. A second motor 12 is fixedly connected to the outer wall of the paper box 1, and a main shaft of the second motor 12 passes through the paper box 1 and the storage cover 11 to the inside of the storage cover 11. A pressure sensor 13 electrically connected to the first motor 3 is fixedly connected to the top inner wall of the storage cover 11, and the other end of the pressure sensor 13 is fixedly connected to a fixing frame 14, and a paper pickup wheel 15 is rotatably connected to the inner wall of the fixing frame 14. One end of the main shaft of the second motor 12 passes through the storage cover 11 and passes through the fixing frame 14 and is fixedly connected to the rotating shaft of the paper pickup wheel 15;

[0026] When in use, the staff places the stacked paper on the carrier plate 2, and the pressure sensor 13 is the detected pressure at this time, and the pressure sensor 13 will transmit the signal to the first motor 3, so that the first motor 3 runs to drive the threaded rod 4 to rotate. The rotation of the threaded rod 4 causes the push tube 5 threadedly connected thereto to start pushing the slide plate 6 to move up. The slide plate 6 moves up to push the slider 8 through the load-bearing pressure spring 9. In this process, the push rod 7 is used to limit the load-bearing pressure spring 9 and the slider 8. The slider 8 moves up to push the carrier plate 2 to twist, so that one end of the stacked paper begins to tilt, so that the top of the paper fits with the pickup wheel 15, so that the pickup wheel 15 squeezes the pressure sensor 13 through the fixing frame 14, so that after the pressure sensor 13 detects the pressure, it transmits the signal to the first motor 3 to stop it from running. It should be noted that as the paper is gradually transported to the inside of the printer After the printing position, the thickness of the paper on the carrier plate 2 is reduced, and the pressure on the pickup roller 15 is reduced, so the pressure sensor 13 will transmit a signal to the first motor 3 again, so that the first motor 3 runs again to push the paper to fit with the pickup roller 15, so that the force of the paper and the pickup roller 15 fitting is kept constant, and the rotation of the second motor 12 will drive the pickup roller 15 to rotate, and the rotation of the pickup roller 15 will rub the uppermost paper on the carrier plate 2 to move toward the output paper board 10, and the output paper board 10 moves to the printing position in the printer, so as to complete the paper conveying in a cycle, and realize that when the pickup roller 15 conveys the paper, the force of the pickup roller 15 rubbing the paper is accurately controlled, so that the paper is smoothly conveyed from the paper box 1 to the printing area in the printer, thereby improving the printing speed and reducing the probability of problems such as paper jamming, damage and simultaneous conveying of multiple sheets during the conveying process;

[0027] When the paper is stuck, damaged or multiple sheets are conveyed at the same time during the conveying process, the first motor 3 runs in the reverse direction, so that the pickup wheel 15 can be reversed to correct the reverse rotation of the paper.

[0028] As a preferred solution, Figures 3 to 6As shown, the inner end wall of the fixed cover is provided with a symmetrically arranged limit groove 16, the inner wall of the limit groove 16 is slidably connected to the limit block 17, the bottom of the limit block 17 is fixedly connected with an adjusting pressure spring 18, the other end of the adjusting pressure spring 18 is fixedly connected to the bottom inner wall of the limit groove 16, the inner wall of the storage cover 11 is rotatably connected with a lower clamping roller 19, the outer wall of the limit block 17 is hinged with an eccentric wheel 20 through a torsion spring, the other end of the eccentric wheel 20 is hinged with an upper clamping roller 21 through a torsion spring, the outer wall of the main shaft of the second motor 12 is fixedly connected with a smooth ratchet 22, the smooth ratchet 22 and the rotating shaft of the upper clamping roller 21 are synchronously rotated and connected through an elastic belt, and a paper feeding and paper returning channel for paper to pass through is formed between the upper clamping roller 21 and the lower clamping roller 19, the inner wall of the storage cover 11 is fixedly connected with an arc-shaped push plate 23 that fits the outer wall of the eccentric wheel 20, and the outer wall of the eccentric wheel 20 is fixedly connected with a blocking rod 24;

[0029] When in use, when the second motor 12 runs in the reverse direction to reverse the pickup roller 15, the second motor 12 will also drive the upper clamping roller 21 to rotate through the smooth ratchet 22, and the upper clamping roller 21 is hinged to the eccentric disk through the torsion spring, so the upper clamping roller 21 will also drive the eccentric disk to rotate, so that when the eccentric disk rotates, it is blocked by the push plate 23, so that the eccentric disk starts to squeeze the limit block 17, so that the limit block 17 squeezes the regulating pressure spring 18 in the limit groove 16 and then starts to move, so that the upper clamping roller 21 moves to the lower clamping roller 19 The eccentric disk is moved, and as the eccentric disk rotates, the blocking rod 24 is blocked by the push plate 23, and the eccentric disk cannot rotate, so that the upper clamping roller 21 and the lower clamping roller 19 fit together to clamp the paper that needs to be corrected in the reverse direction. Because the upper clamping roller 21 and the eccentric disk are hinged by a torsion spring, the eccentric disk is blocked and cannot rotate, but the upper clamping roller 21 can still rotate, so that the upper clamping roller 21 and the lower clamping roller 19 fit together and rotate to start the reverse correction of the paper clamping, and because of the clamping of the paper, the paper can be squeezed flat;

[0030] When the paper is reversed and corrected, the second motor 12 conveys the paper again, and the eccentric disk and the upper clamping roller 21 begin to reset and twist under the torsion of their own torsion springs, and the limit block 17 begins to reset and move under the elastic force of the adjustment pressure spring 18, thereby allowing the eccentric disk and the upper clamping roller 21 to reset and move.

[0031] As another preferred solution, Figure 4 As shown, a rubber paginator 25 is fixedly connected to the top of the paperboard 10;

[0032] When in use, the rubber pager 25 allows the friction between the paper at the bottom and the pager 25 to be greater than the friction between the papers when multiple sheets of paper are conveyed simultaneously, so that the paper at the bottom is blocked by the pager 25, thereby reducing the probability of conveying multiple sheets of paper simultaneously.

[0033] As another preferred solution, Figures 1 to 3 As shown, the inner wall of the paper box 1 is provided with a photoelectric sensor 26, and the photoelectric sensor 26 is electrically connected to the second motor 12;

[0034] When in use, the paper feeding state is detected by the photoelectric sensor 26, and the second motor 12 is controlled to operate to automatically correct the reverse direction of the paper.

[0035] As another preferred solution, Figure 2 As shown, a symmetrically arranged paper baffle 27 is fixedly connected to the top of the carrying plate 2;

[0036] When in use, the paper on the carrying plate 2 is blocked by the provided paper blocking paper 27, thereby increasing the stability of the paper when it is stacked on the carrying plate 2 for transportation.

[0037] As another preferred solution, Figure 4 As shown, one end of the paperboard 10 close to the carrying plate 2 is arranged in an arc shape;

[0038] When in use, the arc-shaped paperboard 10 can guide the paper to prevent it from getting stuck during the conveying process.

[0039] As another preferred solution, Figure 4 As shown, the upper clamping roller 21 and the lower clamping roller 19 are both made of rubber;

[0040] When in use, the upper clamping roller 21 and the lower clamping roller 19 made of rubber can increase the friction when in contact with the paper without causing damage to the paper.

[0041] Working principle: This embodiment provides a laser printer paper feeding device. When in use, the staff places the stacked paper on the carrier plate 2, and the pressure sensor 13 is the detected pressure at this time. The pressure sensor 13 will transmit the signal to the first motor 3, so that the first motor 3 runs and drives the threaded rod 4 to rotate. The rotation of the threaded rod 4 causes the push tube 5 threadedly connected thereto to start pushing the slide plate 6 to move up. The slide plate 6 moves up to push the slider 8 through the load-bearing pressure spring 9. During this process, the push rod 7 is used to limit the load-bearing pressure spring 9 and the slider 8. The slider 8 moves up to push the carrier plate 2 to twist, so that one end of the stacked paper begins to tilt, so that the top of the paper fits against the pickup wheel 15, so that the pickup wheel 15 squeezes the pressure sensor 13 through the fixing frame 14, so that after the pressure sensor 13 detects the pressure, it transmits the signal to the first motor 3 to stop it. It should be noted that as the paper After the sheets are gradually transported to the printing position inside the printer, the thickness of the paper on the carrier plate 2 decreases, and the pressure on the pickup roller 15 decreases, so the pressure sensor 13 will transmit a signal to the first motor 3 again, so that the first motor 3 runs again to push the paper to fit with the pickup roller 15, so that the force of the paper and the pickup roller 15 fitting is kept constant, and the rotation of the second motor 12 will drive the pickup roller 15 to rotate, and the rotation of the pickup roller 15 will rub the uppermost paper on the carrier plate 2 to move toward the output paper board 10, and the output paper board 10 moves to the printing position in the printer, so as to complete the paper transportation in a cycle, and realize that when the pickup roller 15 transports the paper, the force of the pickup roller 15 rubbing the paper is accurately controlled, so that the paper is smoothly transported from the paper box 1 to the printing area in the printer, thereby improving the printing speed and reducing the probability of problems such as paper jamming, damage and simultaneous transportation of multiple sheets during transportation;

[0042] When the paper is stuck, damaged or multiple sheets are conveyed at the same time during the conveying process, the first motor 3 runs in the reverse direction, so that the pickup wheel 15 can be reversed to correct the reverse rotation of the paper.

[0043] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A laser printer paper feeding device, characterized in that: The invention comprises a paper box (1), wherein the inner wall of the paper box (1) is hingedly connected with a bearing plate (2), the bottom of the paper box (1) is fixedly connected with a first motor (3), the inner wall of the bottom of the paper box (1) is rotatably connected with a threaded rod (4), the main shaft of the first motor (3) passes through the inner wall of the bottom of the paper box (1) to the inside thereof and is fixedly connected with the bottom of the threaded rod (4), the threaded rod (4) is sleeved with a push tube (5) threadedly connected thereto, the top of the push tube (5) is fixedly connected with a slide plate (6), and the top of the slide plate (6) is provided with a symmetrically arranged A push rod (7), one end of which passes through the slide plate (6) and is slidably connected to the penetration point, a slider (8) is slidably connected to the bottom of the carrier plate (2), the other end of the slider (8) is hinged to the top of the push rod (7), the outer wall of the push rod (7) is provided with a load-bearing pressure spring (9), the two ends of the load-bearing pressure spring (9) are respectively abutted against the top of the slide plate (6) and the bottom of the slider (8), and a paper rubbing mechanism is arranged inside the paper box (1) for rubbing the stacked paper separately and conveying it to the printing position inside the printer.

2. A laser printer paper feeding device according to claim 1, characterized in that: The paper picking mechanism comprises an inclined paper board (10), the paper board (10) being fixedly connected to the inner wall of the paper box (1), the inner wall of the paper box (1) being fixedly connected to a storage cover (11), the outer wall of the paper box (1) being fixedly connected to a second motor (12), the main shaft of the second motor (12) passing through the paper box (1) and the storage cover (11) to the inside of the storage cover (11), the top inner wall of the storage cover (11) being fixedly connected to a pressure sensor (13) electrically connected to the first motor (3), the other end of the pressure sensor (13) being fixedly connected to a fixing frame (14), the inner wall of the fixing frame (14) being rotatably connected to a paper picking wheel (15), one end of the main shaft of the second motor (12) passing through the storage cover (11) passing through the fixing frame (14) and being fixedly connected to the rotating shaft of the paper picking wheel (15).

3. A laser printer paper feeding device according to claim 2, characterized in that: The inner end wall of the fixed cover is provided with a symmetrically arranged limit groove (16), the inner wall of the limit groove (16) is slidably connected to a limit block (17), the bottom of the limit block (17) is fixedly connected to an adjusting pressure spring (18), the other end of the adjusting pressure spring (18) is fixedly connected to the bottom inner wall of the limit groove (16), the inner wall of the storage cover (11) is rotatably connected to a lower clamping roller (19), the outer wall of the limit block (17) is hinged to an eccentric wheel (20) through a torsion spring, the other end of the eccentric wheel (20) is hinged to the torsion spring An upper clamping roller (21) is hingedly connected, a smooth ratchet (22) is fixedly connected to the outer wall of the main shaft of the second motor (12), the smooth ratchet (22) and the rotating shaft of the upper clamping roller (21) are synchronously rotated through an elastic belt, and a paper feeding and paper returning channel for paper to pass through is formed between the upper clamping roller (21) and the lower clamping roller (19), the inner wall of the storage cover (11) is fixedly connected to an arc-shaped push plate (23) that fits the outer wall of the eccentric wheel (20), and the outer wall of the eccentric wheel (20) is fixedly connected to a blocking rod (24).

4. A laser printer paper feeding device according to claim 2, characterized in that: The top of the paperboard (10) is fixedly connected with a paginator (25) made of rubber material.

5. A laser printer paper feeding device according to claim 2, characterized in that: A photoelectric sensor (26) is provided on the inner wall of the paper box (1), and the photoelectric sensor (26) is electrically connected to the second motor (12).

6. A laser printer paper feeding device according to claim 4, characterized in that: A symmetrically arranged paper baffle (27) is fixedly connected to the top of the carrying plate (2).

7. A laser printer paper feeding device according to claim 2, characterized in that: One end of the paper board (10) close to the carrying plate (2) is arranged in an arc shape.

8. A laser printer paper feeding device according to claim 1, characterized in that: The upper clamping roller (21) and the lower clamping roller (19) are both made of rubber.

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