Paper feeding mechanism of inkjet printer and continuous paper feeding method

Abstract

The present application relates to a kind of paper feeding mechanism of ink-jet printer, including paper roller;Paper feed roller;Driving mechanism, with paper feed roller driving connection;First gear set, with paper roller connection;Second gear set, with paper feed roller connection and with the transmission connection of first gear set;Clutch gear set, meshing connection between first gear set and second gear set;Separation driver, with clutch gear set transmission association and can separate clutch gear set and the meshing connection of first gear set, second gear set;The paper roller, paper feed roller under the transmission of driving mechanism, first gear set, second gear set, clutch gear set, rotate in opposite direction.This paper feeding mechanism of ink-jet printer can carry out paper roller action and paper feed action simultaneously, and when carrying out the paper feed of last page in printing task, paper roller power can be cut off.The present application also relates to the paper feeding method using the ink-jet printer.

Description

Technical Field

[0001] This invention relates to a paper feeding mechanism for an inkjet printer, and also to a continuous paper feeding method for the inkjet printer. Background Technology

[0002] Printers are common products used in daily work and life. To feed paper, inkjet printers typically have a paper feeding mechanism, which includes a paper feed motor and paper feed rollers connected to the motor. Based on this mechanism, the paper feeding action usually involves the following steps: the paper feed motor reverses, driving the paper feed rollers to feed the paper into the paper path; when the paper reaches the paper feed rollers, the paper feed motor rotates forward, the paper feed rollers stop feeding, and the paper feed rollers continue feeding; after the tail of the previous sheet leaves the paper feed rollers, the paper feed motor reverses again to feed the next sheet. This cycle repeats to complete a multi-page printing task. In this printing process, the next sheet can only be fed after the previous sheet has finished printing and been ejected. This paper feeding process is time-consuming, especially for multi-page printing, resulting in low printing efficiency. Summary of the Invention

[0003] The first technical problem to be solved by the present invention is to provide an inkjet printer paper feeding mechanism that can simultaneously perform paper feeding and paper feeding actions, and can also cut off the power of the paper feeding roller when the last page of the printing task is printed, so as to avoid unnecessary paper feeding.

[0004] The second technical problem to be solved by the present invention is to provide a continuous paper feeding method for an inkjet printer that uses the aforementioned paper feeding mechanism of an inkjet printer, in contrast to the prior art.

[0005] The technical solution adopted by the present invention to solve the first technical problem mentioned above is: a paper feeding mechanism for an inkjet printer, comprising...

[0006] Paper feed rollers;

[0007] Paper feed roller;

[0008] The drive mechanism is connected to the paper feed roller drive;

[0009] Its features include:

[0010] The first gear set is connected to the paper feed roller;

[0011] The second gear set is connected to the paper feed roller and is also connected to the first gear set for transmission.

[0012] The clutch gear set is meshed between the first gear set and the second gear set;

[0013] The disengagement drive is associated with the clutch gear set transmission and can disengage the clutch gear set from the meshing connection of the first gear set and the second gear set;

[0014] The paper feed roller and the paper feed roller rotate in opposite directions under the transmission action of the drive mechanism, the first gear set, the second gear set, and the clutch gear set.

[0015] As an improvement, a bracket is also included, on which the first gear set, the second gear set, the clutch gear set, and the disengagement driver are mounted.

[0016] As an improvement, the clutch gear set includes a first gear and a second gear. The first gear is rotatably connected to the bracket and meshes with the second gear set. The second gear can be oscillatingly meshed with the first gear relative to the first gear through a connecting seat, and the second gear can mesh and disengage with the first gear set based on the oscillation.

[0017] The separate drive is associated with the second gear transmission.

[0018] As an improvement, the connecting seat is provided with a connecting shaft, and the second gear is sleeved on the connecting shaft;

[0019] The bracket is provided with a guide hole that matches the swing path of the second gear. The connecting shaft is limited in the guide hole. The separation driver can drive the connecting shaft to rotate counterclockwise, thereby causing the second gear to separate from the first gear set.

[0020] As an improvement, the separation driver includes a dial and a lever. The dial is rotatably connected to the bracket via a first torsion spring. The first torsion spring has the tendency to drive the dial to rotate counterclockwise, thereby pushing the second gear to rotate in the direction of separation from the first gear set. The lever is drivenly connected to the dial and can move the dial to rotate clockwise to a position that does not interfere with the second gear.

[0021] As an improvement, a snap-fit ​​portion is also formed on the peripheral wall of the dial;

[0022] The lever is rotatably connected to the bracket and located to the left of the dial wheel. The lower end of the lever has a locking part that can be locked with the snap-fit ​​part.

[0023] The lever can be rotated counterclockwise by an external force to lock with the dial wheel, so that the dial wheel is in a position that does not interfere with the second gear; the lever can be rotated clockwise by an external force to release the lock with the dial wheel.

[0024] As an improvement, the separation driver further includes a drive assembly for driving the lever to rotate counterclockwise, the drive assembly being mounted on the bracket and located between the dial and the lever.

[0025] As an improvement, the drive assembly also includes a third gear, a fourth gear, and a pressure arm;

[0026] The third gear is rotatably connected to the bracket and is connected to one of the gears in the second gear set;

[0027] The fourth gear is oscillatingly connected to the third gear via a connecting rod and meshes with the third gear. The peripheral wall of the dial wheel is provided with meshing teeth. The fourth gear can engage and disengage with the dial wheel through the meshing teeth based on the oscillation.

[0028] The middle part of the pressure arm is rotatably connected to the bracket by a second torsion spring. The lower end of the pressure arm can engage and disengage with the fourth gear based on rotation. The upper end of the pressure arm abuts against the upper end of the lever. The second torsion spring has a tendency to drive the pressure arm to rotate counterclockwise and disengage from the engagement state with the fourth gear.

[0029] As an improvement, the upper end of the lever is set to correspond to the maintenance position of the printing carriage, and the lever can rotate clockwise based on the triggering of the printing carriage.

[0030] The technical solution adopted by the present invention to solve the second technical problem mentioned above is: a continuous paper feeding method for an inkjet printer, characterized in that: a paper feeding mechanism as described above is used;

[0031] When printing n pages, where n is a natural number and n≥2, during the printing of the first n-1 pages, the clutch gear set is engaged with the first gear set and the second gear set. The drive mechanism drives the paper feed roller to rotate forward to feed the paper, and at the same time drives the first gear set, the second gear set, and the clutch gear set to rotate to drive the paper feed roller to rotate in reverse to feed the paper.

[0032] When printing the nth page, the disengagement driver acts on the clutch gear set to disengage the clutch gear set from the first gear set and the second gear set. The drive mechanism drives the paper feed roller to rotate forward to feed the paper, and the paper feed roller stops rotating due to the transmission disengagement.

[0033] Compared with the prior art, the advantages of the present invention are as follows: The paper feeding mechanism and the corresponding paper feeding method of the inkjet printer in the present invention realize the relative opposite rotation of the paper feed roller and the paper feed roller based on the transmission. In this way, paper feeding can be performed at the same time as paper feeding, without waiting for the paper tail of the previous paper to leave the paper feed roller before the paper feeding action is performed. That is, the paper feeding action and the paper feeding action are synchronized, improving the paper feeding efficiency and reducing the waiting time for printing.

[0034] Based on this, by utilizing the clutch gear set and the separation driver, the transmission and disengagement of the paper feed roller can also be achieved. Thus, when printing the last page, the power to the paper feed roller can be cut off by the separation driver driving the clutch gear set, which reduces energy consumption and avoids unnecessary paper feeding. Attached Figure Description

[0035] Figure 1 This is a perspective view of an inkjet printer in a multi-page continuous printing state according to an embodiment of the present invention.

[0036] Figure 2 for Figure 1 Another perspective view.

[0037] Figure 3 for Figure 1 Diagram of the paper feeding mechanism in its current state.

[0038] Figure 4 for Figure 3 Another perspective view.

[0039] Figure 5 This is a perspective view of the clutch gear set and the first gear set in a separated state in an embodiment of the present invention.

[0040] Figure 6 for Figure 5 Another perspective view. Detailed Implementation

[0041] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments.

[0042] like Figures 1 to 6 As shown, the paper feeding mechanism of the inkjet printer in this embodiment includes a paper feed roller 1, a paper feed roller 2, a drive mechanism 3, a first gear set 4, a second gear set 5, a clutch gear set 6, a disengagement driver 7, and a bracket 8. The entire paper feeding mechanism is mounted on the printer base 9.

[0043] Specifically, the paper feed roller 1 is rotatably mounted on the base 9. The paper feed roller 1 has a paper feed wheel that can contact the upper surface of the paper. Based on the rotation of the paper feed roller 1, the paper is driven into the paper feed channel inside the printer.

[0044] The feed roller 2 is rotatably mounted on the base 9. The feed roller 2 is usually located below the paper feed channel. That is, the feed roller 2 drives the paper to complete the paper feeding action by rolling contact with the lower surface of the paper. In other words, when the leading edge of the paper moves to the position of the feed roller 2 under the action of the paper feed roller 1, the rotation of the feed roller 2 drives the paper to continue to move forward.

[0045] Because the paper feed roller 1 and the paper feed roller 2 have different contact surfaces with the paper, when performing their respective paper feeding and paper feeding functions, the rotation direction of the paper feed roller 1 is opposite to that of the paper feed roller 2; that is, one rotates clockwise and the other rotates counterclockwise. Based on this characteristic, in existing technologies, due to the use of a single drive mechanism 3, the paper feeding and paper feeding actions are performed in segments and cannot be performed simultaneously. The paper feeding mechanism of the inkjet printer in this embodiment can simultaneously perform the paper feeding and paper feeding actions, thus enabling continuous paper feeding during multi-page printing without interrupting the paper feeding action for paper feeding.

[0046] The drive mechanism 3 is driven to the paper feed roller 2. The drive mechanism 3 includes a motor and a transmission gear set connected to the drive end of the motor. The output gear of the transmission gear set is sleeved on the first end of the paper feed roller 2. In this way, the motor drives the paper feed roller 2 to rotate through the transmission gear set.

[0047] The bracket 8 is mounted on the base 9 and located on the outer side of the ends of the paper feed roller 1 and the paper feed roller 2. The first gear set 4, the second gear set 5, the clutch gear set 6, and the disengagement drive 7 are all mounted on the bracket 8.

[0048] The first gear set 4 is connected to the paper feed roller 1. Specifically, the output gear of the first gear set 4 is sleeved at the end of the paper feed roller 1.

[0049] The second gear set 5 is connected to the paper feed roller 2. Specifically, the input gear of the second gear set 5 is sleeved on the second end of the paper feed roller 2. The second gear set 5 and the first gear set 4 are arranged on the same side, which facilitates the transmission between the two.

[0050] The clutch gear set 6 is engaged between the first gear set 4 and the second gear set 5. The disengagement drive 7 is driven by the clutch gear set 6 and can disengage the clutch gear set 6 from the first gear set 4 and the second gear set 5.

[0051] The specific configuration of the first gear set 4, the second gear set 5, and the clutch gear set 6 causes the paper feed roller 1 and the paper feed roller 2 to rotate in opposite directions under the transmission action of the drive mechanism 3, the first gear set 4, the second gear set 5, and the clutch gear set 6.

[0052] Specifically, the clutch gear set 6 includes a first gear 61 and a second gear 62. The first gear 61 is rotatably connected to the bracket 8 and meshes with the second gear set 5. The second gear 62 can be oscillatingly connected to the first gear 61 relative to it via a connecting seat 63, and the second gear 62 can engage and disengage from the first gear set 4 based on its oscillation. The disengagement driver 7 is transmissionally associated with the second gear 62. To facilitate assembly and interaction between the disengagement driver 7 and the second gear 62, a connecting shaft 631 is provided on the connecting seat 63, and the second gear 62 is fitted onto the connecting shaft 631. The bracket 8 has a guide hole 81 that matches the oscillation path of the second gear 62, and the connecting shaft 631 is confined within the guide hole 81. This guide hole 81 ensures the stability of the second gear 62 during oscillation. In this embodiment, the disengagement driver 7 can drive the connecting shaft 631 to rotate counterclockwise, thereby causing the second gear 62 to oscillate counterclockwise relative to the first gear 61, and thus disengage from the first gear set 4. At this time, the first gear set 4 and the second gear set 5 are disconnected from the transmission, and the paper feed roller 1 loses its power source and stops rotating.

[0053] When the disengagement driver 7 does not interfere with the connecting shaft 631, the normal rotation of the feed roller 2 drives the second gear set 5 to rotate. This, in turn, drives the first gear 61 to rotate, causing the second gear 62 to oscillate clockwise relative to the first gear 61. This maintains the meshing relationship between the second gear 62 and the first gear set 4, thus achieving the meshing transmission between the clutch gear set 6, the first gear set 4, and the second gear set. This, in turn, achieves the transmission between the feed roller 2 and the paper feed roller 1. While the feed roller 2 is feeding paper, the paper feed roller 1 can simultaneously perform the paper feeding action. The paper feed roller 1 no longer needs to wait for the feed roller 2 to complete its paper feeding operation before performing its paper feeding action, thereby ensuring continuous printing during multi-page printing tasks.

[0054] Because the paper feeding and paper feeding actions are performed simultaneously, in order to avoid unnecessary paper feeding due to the paper feeding action when printing the last page, in this embodiment, the separation driver 7 drives the clutch gear set 61 to separate from the first gear set 4, so that only the paper feeding action is performed without the paper feeding action.

[0055] The separation driver 7 in this embodiment includes a dial 71 and a lever 72. The dial 71 is rotatably connected to the bracket 8 via a first torsion spring 711. The first torsion spring 711 has a tendency to drive the dial 71 to rotate counterclockwise, thereby pushing the second gear 62 to rotate in the direction of separation from the first gear set 4. In this embodiment, the second gear 62 needs to be swung counterclockwise to separate from the first gear set 4. In this embodiment, the dial 71 achieves the separation push of the second gear 62 by acting on the connecting shaft 631, and the dial 71 has a tendency to push the second gear 62 to separate from the first gear set 4 via the first torsion spring 711. In this embodiment, in order to realize the transmission between the paper feed roller 2 and the paper feed roller 1, the lever 72 is used to act on the dial wheel 71, thereby pushing the dial wheel 71 to rotate clockwise to the position that does not interfere with the connecting shaft 631. That is, the lever 72 is connected to the dial wheel 71 and can push the dial wheel 71 to rotate clockwise to the position that does not interfere with the second gear 62. At this time, the meshing connection between the clutch gear set 6 and the first gear set 4 can be guaranteed, thereby realizing the transmission between the paper feed roller 2 and the paper feed roller 1.

[0056] Specifically, the interaction structure between the dial 71 and the lever 72 is as follows: a locking portion 712 is formed on the peripheral wall of the dial 71. The lever 72 is rotatably connected to the bracket 8 and located on the left side of the dial 71. The lower end of the lever 72 has a locking portion 721 that can lock with the locking portion 712. The lever 72 can also lock with the dial 71 by rotating counterclockwise under external force, so that the dial 71 is in a position that does not interfere with the second gear 62. That is, when the lever 72 and the dial 71 are locked, the dial 71 will remain in a position that does not interfere with the second gear 62. The structure for driving the lever 72 to rotate counterclockwise can adopt various driving structures in the prior art.

[0057] Additionally, lever 72 can also release its lock on dial wheel 71 by rotating clockwise under external force. After lever 72 releases its lock on dial wheel 71, dial wheel 71 can rotate counterclockwise under the action of the first torsion spring 711, thereby pushing connecting shaft 631, which in turn drives the second gear 62 to swing counterclockwise relative to the first gear 61, causing the second gear 62 to separate from the first gear set 4. In this embodiment, the upper end of lever 72 is located near the maintenance position of the printing carriage. Lever 72 can rotate clockwise based on the triggering of the printing carriage. That is, when the printing carriage moves to the maintenance position, it will trigger lever 72, thereby driving lever 72 to rotate clockwise. The locking part 721 on lever 72 disengages from the locking part 712 of dial wheel 71, thereby releasing the lock between lever 72 and dial wheel 71.

[0058] The separation driver 7 in this embodiment also includes a drive assembly 73 for driving the lever 72 to rotate counterclockwise. The drive assembly 73 is mounted on the bracket 8 and located between the dial wheel 71 and the lever 72. The drive assembly 73 also includes a third gear 731, a fourth gear 732, and a pressure arm 733. The third gear 731 is rotatably connected to the bracket 8 and connected to one of the gears in the second gear set 5. The fourth gear 732 is oscillatingly connected to the third gear 731 via a connecting rod 734. A shaft is provided on the connecting rod 734, and the fourth gear 732 is sleeved on the shaft and meshes with the third gear 731. The peripheral wall of the dial wheel 71 has meshing teeth 713. The fourth gear 732 can engage and disengage with the dial wheel 71 through the meshing teeth 713 based on its oscillation. The middle part of the pressure arm 733 is rotatably connected to the bracket 8 through the second torsion spring 7331. The lower end of the pressure arm 733 can engage and disengage with the fourth gear 732 based on rotation. The upper end of the pressure arm 733 abuts against the upper end of the lever 72. The second torsion spring 7331 has the tendency to drive the pressure arm 733 to rotate counterclockwise and disengage from the engagement state with the fourth gear 732.

[0059] In this embodiment, when it is necessary to drive the lever 72 to rotate counterclockwise and lock it with the dial wheel 71, the motor in the drive mechanism 3 reverses, thereby driving the paper feed roller 2 to rotate in the opposite direction to the paper feeding direction. The paper feed roller 2 also drives the second gear set 5 to rotate. Since one gear in the second gear set 5 is connected to the third gear 731, it will also drive the third gear 731 to rotate clockwise. Correspondingly, it will drive the fourth gear 732 to swing clockwise relative to the third gear 731. At the same time, based on the meshing transmission of the third gear 731, the fourth gear 732 itself will rotate counterclockwise. Based on the meshing relationship between the fourth gear 732 and the pressure arm 733, it will drive the pressure arm 733 to rotate counterclockwise. The upper end of the pressure arm 733 will press against the upper end of the lever 72 in the counterclockwise direction, thereby driving the lever 72 to rotate counterclockwise, so that the lower end of the lever 72 moves closer to the dial wheel 71. Simultaneously, as the fourth gear 732 swings clockwise, it meshes with the meshing teeth 713 on the dial wheel 71. Furthermore, as the fourth gear 732 rotates counterclockwise, it causes the dial wheel 71 to rotate clockwise. Based on the counterclockwise rotation of the lever 72 and the clockwise rotation of the dial wheel 71, the locking part 721 on the lever 72 contacts the locking part 712 of the dial wheel 71, further locking them together. At this time, the motor in the drive mechanism 3 stops rotating. Under the locking action of the lever 72 on the dial wheel 71, the dial wheel 71 is ensured to be in a position that does not interfere with the second gear 62. Accordingly, based on the foregoing, the clutch gear set 6 can mesh with the first gear set 4 in this state to achieve transmission between the paper feed roller 2 and the paper feed roller 1.

[0060] Then, as the motor in the drive mechanism 3 rotates forward, it drives the third gear 731 to rotate counterclockwise. Correspondingly, the fourth gear 732 will swing counterclockwise relative to the third gear 731 and separate from the dial wheel 71. At the same time, it will disengage from the pressure arm 733. Based on the action of the second torsion spring 7331, the pressure arm 733 maintains the tendency to press the lever 72 in the counterclockwise direction, so that the lever 72 still maintains the locking effect on the dial wheel 71 until the digitizer triggers the lever 72 to release the locking effect of the lever 72 on the dial wheel 1.

[0061] A continuous paper feeding method for an inkjet printer using the aforementioned paper feeding mechanism includes the following steps.

[0062] When printing n pages, where n is a natural number and n≥2, during the printing of the first n-1 pages, the clutch gear set 6 is engaged with the first gear set 4 and the second gear set 5. The drive mechanism 3 drives the paper feed roller 2 to rotate forward to feed the paper, and at the same time drives the first gear set 4, the second gear set 5, and the clutch gear set 6 to rotate, thereby driving the paper feed roller 1 to rotate in reverse to feed the paper.

[0063] When printing the nth page, the separation driver 7 acts on the clutch gear set 6 to disengage the clutch gear set 6 from the first gear set 4 and the second gear set 5. The drive mechanism 3 drives the paper feed roller 2 to rotate forward to feed the paper, and the paper feed roller 1 stops rotating due to the transmission separation.

[0064] like Figure 5 and Figure 6 As shown, specifically, when the inkjet printer is in the powered-on ready state, the printhead carriage is in the printhead maintenance position. At this time, the printhead trigger lever 72 rotates clockwise, disengaging the lever 72 from the dial wheel 71. Under the action of the first torsion spring 711, the dial wheel 71 rotates counterclockwise to the middle position of the guide hole 81. Correspondingly, the dial wheel 71 pushes the connecting shaft 631 to the middle position of the guide hole 81, thereby causing the second gear 62 to be disengaged from the first gear set 4. At the same time, based on the clockwise rotation of the lever 72, its first end exerts a clockwise driving force on the upper end of the pressure arm 733, causing the pressure arm 733 to rotate clockwise and engage with the fourth gear 732. At this time, the fourth gear 732 is also disengaged from the dial wheel 71.

[0065] like Figure 3 and Figure 4As shown, when n pages need to be printed, the print head moves away from the print head maintenance position, releasing the clockwise rotation drive of the lever 72. Simultaneously, the pressure arm 733, based on the counter-clockwise pressure of the second torsion spring 7331, also exerts pressure on the upper end of the lever 72, causing it to rotate counter-clockwise. Before printing begins, the motor in the drive mechanism 3 is reversed. As mentioned earlier, the lever 72 and the dial wheel 71 lock together, thereby releasing the interference of the dial wheel 71 with the second gear 62 via the connecting shaft 631. Simultaneously, the locking of the lever 72 and the dial wheel 71 ensures a non-interference state between the dial wheel 71 and the second gear 62.

[0066] Then printing can begin. The motor in drive mechanism 3 rotates forward, driving the paper feed roller 2 and simultaneously rotating the second gear set 5. The second gear set 5 drives the first gear 61 to rotate clockwise, causing the second gear 62 to swing clockwise relative to the first gear 61. This meshes the first gear 61 with the first gear set 4, thus driving the paper feed roller 1. In this way, both paper feeding and paper feeding actions are performed simultaneously. This process continues until the first n-1 pages are printed.

[0067] like Figure 5 and Figure 6 As shown, when printing the nth page is required, the print head moves to the print head maintenance position. The print head presses against the lever 72, causing the lever 72 to rotate clockwise. Correspondingly, the lever 72 disengages from the dial wheel 71. The dial wheel 71 then rotates counterclockwise under the action of the first torsion spring 711, pushing the connecting shaft 631 to swing counterclockwise. Correspondingly, the second gear 62 swings clockwise relative to the first gear 61, and then separates from the first gear set 4.

[0068] Then the printhead carriage moves out of the printhead carriage maintenance position, and the motor in the drive mechanism 3 continues to rotate forward. However, at this time, it only drives the paper feed roller 2 to rotate, while the paper feed roller 1 stops rotating, thus avoiding unnecessary paper feed.

[0069] The paper feeding mechanism and corresponding paper feeding method of the inkjet printer in this invention realizes the relative opposite rotation of the paper feed roller 2 and the paper feed roller 1 based on the transmission. In this way, paper feeding can be performed at the same time as paper feeding, without waiting for the tail of the previous paper to leave the paper feed roller 2 before the paper feeding action is performed. That is, the paper feeding action and the paper feeding action are synchronized, improving the paper feeding efficiency and reducing the waiting time for printing.

[0070] Based on this, by utilizing the cooperation of the clutch gear set 6 and the separation driver 7, the transmission clutch function of the paper feed roller 1 can also be realized. Thus, when the last page of the printing task is printed, the power of the paper feed roller 1 can be cut off by the drive of the clutch gear set 6 by the separation driver 7, which reduces energy consumption on the one hand and avoids unnecessary paper feeding on the other.

[0071] The specification and claims of this invention use terms indicating direction, such as "front," "rear," "upper," "lower," "left," "right," "side," "top," and "bottom," to describe various exemplary structural parts and elements of the invention. However, these terms are used herein merely for ease of explanation and are determined based on the exemplary orientations shown in the accompanying drawings. Since the embodiments disclosed in this invention can be arranged in different orientations, these terms indicating direction are for illustrative purposes only and should not be considered as limitations. For example, "upper" and "lower" are not necessarily limited to directions opposite to or consistent with the direction of gravity.

Claims

1. A paper feeding mechanism for an inkjet printer, comprising: Paper feed roller (1); Paper feed roller (2); The drive mechanism (3) is connected to the paper feed roller (2) for driving; characterized in that Also includes The first gear set (4) is connected to the paper feed roller (1); The second gear set (5) is connected to the paper feed roller (2) and is also connected to the first gear set (4) for transmission. The clutch gear set (6) is meshed between the first gear set (4) and the second gear set (5); The disengagement drive (7) is connected to the clutch gear set (6) and can disengage the clutch gear set (6) from the first gear set (4) and the second gear set (5); The bracket (8) is provided with the first gear set (4), the second gear set (5), the clutch gear set (6), and the disengagement driver (7). The paper feed roller (1) and the paper feed roller (2) rotate in opposite directions under the transmission action of the drive mechanism (3), the first gear set (4), the second gear set (5), and the clutch gear set (6); The clutch gear set (6) includes a first gear (61) and a second gear (62). The first gear (61) is rotatably connected to the bracket (8) and meshes with the second gear set (5). The second gear (62) can be oscillatingly meshed with the first gear (61) relative to the first gear (61) through the connecting seat (63). The second gear (62) can mesh and disengage with the first gear set (4) based on the oscillation. The separate drive (7) is connected to the second gear (62) in a transmission relationship; The separation driver (7) includes a dial (71) and a lever (72). The dial (71) is rotatably connected to the bracket (8) via a first torsion spring (711). The first torsion spring (711) has the tendency to drive the dial (71) to rotate counterclockwise and push the second gear (62) to rotate in the direction of separation from the first gear set (4). The lever (72) is connected to the dial (71) and can drive the dial (71) to rotate clockwise to a position that does not interfere with the second gear (62). The peripheral wall of the dial (71) is also formed with a snap-fit ​​part (712); The lever (72) is rotatably connected to the bracket (8) and located to the left of the dial (71). The lower end of the lever (72) has a locking part (721) that can be locked with the snap-fit ​​part (712). The lever (72) can be rotated counterclockwise by external force to lock with the dial wheel (71) so that the dial wheel (71) is in a position that does not interfere with the second gear (62); the lever (72) can be rotated clockwise by external force to release the lock with the dial wheel (71).

2. The paper feeding mechanism of the inkjet printer according to claim 1, characterized in that: The connecting seat (63) is provided with a connecting shaft (631), and the second gear (62) is sleeved on the connecting shaft (631); The bracket (8) is provided with a guide hole (81) that matches the swing path of the second gear (62). The connecting shaft (631) is limited in the guide hole (81). The separation driver (7) can drive the connecting shaft (631) to rotate counterclockwise and drive the second gear (62) to separate from the first gear set (4).

3. The paper feeding mechanism of the inkjet printer according to claim 1, characterized in that: The separation driver (7) further includes a drive assembly (73) for driving the lever (72) to rotate counterclockwise, the drive assembly (73) being disposed on the bracket (8) and located between the dial (71) and the lever (72).

4. The paper feeding mechanism of the inkjet printer according to claim 3, characterized in that: The drive assembly (73) also includes a third gear (731), a fourth gear (732), and a pressure arm (733); The third gear (731) is rotatably connected to the bracket (8) and connected to one of the gears in the second gear set (5); The fourth gear (732) is oscillatingly connected to the third gear (731) via a connecting rod (734) and meshes with the third gear (731). The peripheral wall of the dial wheel (71) is provided with meshing teeth (713). The fourth gear (732) can mesh with and disengage from the dial wheel (71) through the meshing teeth (713) based on oscillation. The middle part of the pressure arm (733) is rotatably connected to the bracket (8) by a second torsion spring (7331). The lower end of the pressure arm (733) can engage and disengage with the fourth gear (732) based on rotation. The upper end of the pressure arm (733) abuts against the upper end of the lever (72). The second torsion spring (7331) has the tendency to drive the pressure arm (733) to rotate counterclockwise and disengage from the engagement state with the fourth gear (732).

5. The paper feeding mechanism of the inkjet printer according to any one of claims 1 to 4, characterized in that: The upper end of the lever (72) is set in the position corresponding to the maintenance position of the word carriage, and the lever (72) can rotate clockwise based on the triggering of the word carriage.

6. A continuous paper feeding method for an inkjet printer, characterized in that: The paper feeding mechanism described in any one of claims 1 to 5 is adopted; When printing n pages, where n is a natural number and n≥2, during the printing of the first n-1 pages, the clutch gear set (6) is engaged with the first gear set (4) and the second gear set (5). The drive mechanism (3) drives the paper feed roller (2) to rotate forward to feed the paper, and at the same time drives the first gear set (4), the second gear set (5), and the clutch gear set (6) to rotate to drive the paper feed roller (1) to rotate in reverse to feed the paper. When printing the nth page, the separation driver (7) acts on the clutch gear set (6) to disengage the clutch gear set (6) from the first gear set (4) and the second gear set (5). The drive mechanism (3) drives the paper feed roller (2) to rotate forward to feed the paper, and the paper feed roller (1) stops rotating due to the transmission separation.

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