Automatic paper feeding structure

Abstract

The utility model relates to the technical field of printing equipment, and discloses an automatic paper feeding structure which comprises a base, an internal turning cover is installed at the top end of the base, a paper bracket is installed at one end of the top of the base, a paper feeding opening is formed between the internal turning cover and the base, and a paper feeding channel is formed between the internal turning cover and the base. And the paper feeding channel communicates with the paper feeding opening, a friction plate is arranged at the bottom of the paper feeding opening, and a rocker arm pressing mechanism is arranged below the inner turning cover. According to the automatic paper feeding structure, paper can be pressed on the printing assembly through the rubber roller to achieve stable printing, the first rolling wheel can continuously convey the paper into the printing assembly to be printed, and the friction force of the first rolling wheel to the paper is larger than that of a friction plate to the paper; the friction force of the friction plates on the paper is larger than that between the paper, so that if the paper is overlapped, the friction plates can filter out the overlapped paper, and the problem of low paper feeding efficiency is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printing equipment, in particular to an automatic paper feeding structure. Background Technique

[0002] Printing equipment is one of the computer output devices, which is used to print the processing results of the computer on relevant media. In the fields of thermal transfer printing and thermal printing, a single roller is mostly used to achieve the multi-functions of printing and paper feeding. Usually, continuous printing is carried out by using roll paper or folded paper with ant lines. If it is necessary to print individual single sheets of paper, only manual paper feeding can be used, and printing is carried out one by one. In order to improve the convenience of user printing, it is necessary to automatically print a stack of single sheets placed at one time.

[0003] After retrieval, in the common single rubber roller mode, single sheets of paper cannot be continuously printed, and manual paper feeding one by one is required, which is relatively troublesome. If the speeds of the rollers in the multi-roller paper feeding are not synchronized, problems such as paper jamming and tearing are likely to occur. Unstable paper feeding pressure, unreasonable paper grasping, etc. are likely to cause double feeding phenomena.

[0004] There is an urgent need for an automatic paper feeding structure to solve the technical defects mentioned in the above technology. Content of the Utility Model

[0005] The purpose of the utility model is to provide an automatic paper feeding structure to solve the problem of low paper feeding efficiency mentioned in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: an automatic paper feeding structure, including a base, an internal flip cover is installed at the top of the base, a paper tray is installed at one end of the top of the base, a paper feeding opening is arranged between the internal flip cover and the base, a paper feeding channel is formed between the internal flip cover and the base, and the paper feeding channel is communicated with the paper feeding opening. A friction plate is arranged at the bottom of the paper feeding opening, a rocker arm pressing mechanism is arranged below the internal flip cover, a first roller is arranged at one end of the rocker arm pressing mechanism close to the paper feeding opening, elastic pieces are arranged on both sides of the first roller, a second roller is arranged in the automatic paper feeding structure, a printing component is arranged below the second roller, a supply shaft is arranged at one end of the bottom of the printing component, a recovery shaft is arranged at the other end of the bottom of the printing component, a first sensor is arranged at one end of the second roller, a second sensor is arranged at the other end of the second roller, a linkage gear is installed on one side of the second roller, a second stepping motor is installed on one side inside the base, and a second transmission gear set is installed at the output end of the second stepping motor;

[0007] The rocker arm pressing mechanism includes a rocker arm main body, a first roller is movably installed inside the rocker arm main body, a first transmission gear set is installed on one side of the rocker arm main body, and a first stepping motor is installed on the rocker arm main body.

[0008] Preferably, the first sensor, the second sensor, the first stepping motor, and the second stepping motor are all connected to a controller assembly inside the base.

[0009] Preferably, an output end of the first stepping motor is connected to a first transmission gear set, and the first roller is pressed against the friction plate.

[0010] Preferably, the linkage gear is in meshing connection with a second transmission gear set, and an angle between the paper tray and the paper feed channel is an obtuse angle.

[0011] Preferably, the first sensor, the second sensor, and the second stepping motor are all connected to a controller assembly inside the base.

[0012] Preferably, the rocker arm pressing mechanism includes a first transmission shaft. One end of the first transmission shaft is connected to the first transmission gear set. The first transmission shaft is inserted into the rocker arm main body, and the second roller is located on the upper wall surface of the paper feed channel.

[0013] Preferably, the rocker arm pressing mechanism includes a second transmission shaft, a one-way bearing, and a bushing. One end of the second transmission shaft is connected to the first transmission gear set. The other end of the second transmission shaft is connected to the bushing. The bushing is clamped in a clamping port of the rocker arm main body. The second transmission shaft is inserted into the one-way bearing, and the one-way bearing is inserted into the first roller.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows: This automatic paper feeding structure not only realizes the function of enhancing the paper feeding efficiency, realizes the functions of preventing paper jamming and being torn, but also realizes the function of reducing consumables.

[0015] (1) By providing a shrapnel, a rocker arm pressing mechanism, a paper feeding channel, a friction plate, a first stepping motor, a rocker arm body, and a first transmission gear set, when the paper enters the paper feeding channel for printing, the first roller in the internal flip cover can continuously convey the paper from the paper feeding opening to the inside of the printing assembly for printing. The first stepping motor drives the gear on the rocker arm body to rotate. When the gear revolves, it presses the first roller at one end of the rocker arm body against the friction plate. The moment of the rocker arm rotating and pressing against the friction plate is stable because the frictional force of the first roller on the paper is greater than the frictional force of the friction plate on the paper, and the frictional force of the friction plate on the paper is greater than the frictional force between the papers. Therefore, if there is paper jam, the friction plate will filter out the overlapping papers. This structure realizes the function of facilitating continuous and stable paper feeding. The rocker arm pressing is achieved by the force applied by the first stepping motor, which is different from the spring pressing in the traditional technology; the paper transmission is synchronous. By installing a one-way bearing inside the first roller, when the same pulse is given to the first stepping motor and the second stepping motor, the linear velocity of the second roller is greater than that of the first roller. During the paper transmission process, the second roller acts on the first roller through the paper, and due to the one-way bearing, the first roller slips. Therefore, the linear velocity of the first roller finally equals that of the second roller to avoid paper transmission failures caused by speed errors;

[0016] (2) By providing a first roller and a second roller, the active linear velocity of the outer diameter of the first roller is V1, and the active linear velocity of the outer diameter of the second roller is V2, where V2 > V1; one end of the paper is pressed under the first roller, and the other end is pressed under the second roller. Due to the reverse slipping effect of the one-way bearing inside the first roller, the second roller will drive the first roller to rotate. At this time, the passive speed of the first roller is V1 = V2, thus ensuring that the linear velocities of the first roller and the second roller are consistent, enabling the paper to always maintain stretching rotation and avoiding problems such as paper wrinkling, paper jamming, and paper clogging;

[0017] (3) By providing a recovery shaft, a first sensor, a second sensor, and a supply shaft, during the process of the printing assembly inside the base printing the paper, after the first sensor inside the base detects the paper first, the second roller starts to roll and feed the paper, and then the recovery shaft and the supply shaft start to rotate and work, but they do not keep rotating all the time. When the paper leaves the second sensor, the second roller stops rotating, and the paper is sent out by the paper discharging unit. This structure can effectively save consumables. Brief Description of the Drawings

[0018] Figure 1 It is a front - view sectional structure schematic diagram of the present utility model;

[0019] Figure 2 It is a side - view sectional structure schematic diagram of the present utility model;

[0020] Figure 3 It is a front - view three - dimensional structure schematic diagram of the rocker arm pressing mechanism of the present utility model;

[0021] Figure 4 is the front view unfolded three-dimensional structural schematic diagram of the present utility model;

[0022] Figure 5 is the partial exploded view of the rocker arm pressing mechanism 6 of the present utility model.

[0023] In the figure: 1, base; 2, internal flip cover; 3, paper feeding opening; 4, paper tray; 5, elastic sheet; 6, rocker arm pressing mechanism; 7, first roller; 8, second roller; 9, recovery shaft; 10, first sensor; 11, printing assembly; 12, second sensor; 13, supply shaft; 14, paper feeding channel; 15, friction plate; 16, first stepping motor; 17, rocker arm main body; 18, first transmission gear set; 20, second stepping motor; 21, linkage gear; 22, second transmission gear set; 23, first transmission shaft; 24, second transmission shaft; 25, one-way bearing; 26, bushing; 27, engaging port. Specific embodiments

[0024] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.

[0025] Embodiment 1: Please refer to Figures 1-5 , an automatic paper feeding structure, including a base 1, an internal flip cover 2 is installed at the top of the base 1, a paper tray 4 is installed at one end of the top of the base 1, a paper feeding opening 3 is arranged between the internal flip cover 2 and the base 1, a paper feeding channel 14 is formed between the internal flip cover 2 and the base 1, and the paper feeding channel 14 is communicated with the paper feeding opening 3. A friction plate 15 is arranged at the bottom of the paper feeding opening 3, a rocker arm pressing mechanism 6 is arranged at the rear side of the internal flip cover 2, a first roller 7 is arranged at one end of the rocker arm pressing mechanism 6 close to the paper feeding opening 3, a second roller 8 is rotatably mounted in the middle of the internal flip cover 2, elastic sheets 5 are arranged on both sides of the first roller 7, a printing assembly 11 is arranged below the second roller 8, a supply shaft 13 is arranged at one end of the bottom of the printing assembly 11, a recovery shaft 9 is arranged at the other end of the bottom of the printing assembly 11, a first sensor 10 is arranged at one end of the second roller 8, a second sensor 12 is arranged at the other end of the second roller 8, a linkage gear 21 is installed on one side of the second roller 8, a second stepping motor 20 is installed on one side inside the base 1, and a second transmission gear set 22 is installed at the output end of the second stepping motor 20;

[0026] The swing arm pressing mechanism 6 includes a swing arm main body 17, a first roller 7 is movably installed inside the swing arm main body 17, a first transmission gear set 18 is installed on one side of the swing arm main body 17, a first stepping motor 16 is installed on the swing arm main body 17, the output end of the first stepping motor 16 is connected to the first transmission gear set 18, and the first roller 7 is pressed against the friction plate 15.

[0027] See Figure 5 , the swing arm pressing mechanism 6 includes a first transmission shaft 23, a second transmission shaft 24, a one-way bearing 25 and a bushing 26. One end of the first transmission shaft 23 is connected to the first transmission gear set 18, the first transmission shaft is inserted into the swing arm main body 17, one end of the second transmission shaft 24 is connected to the first transmission gear set 18, the other end of the second transmission shaft 24 is connected with a bushing 26, the bushing 26 is clamped in the engaging port 27 of the swing arm main body 17, the second transmission shaft 24 is inserted into the one-way bearing 25, and the one-way bearing 25 is inserted into the first roller 7.

[0028] Specifically, as Figure 1 and Figure 2 shown, the first stepping motor 16 drives the first roller 7 to rotate through the first transmission gear set 18 and the second transmission shaft 24 in sequence. The first roller 7 can press the paper against the printing assembly 11 to achieve stable printing. The first roller 7 in the inner flip cover 2 can continuously convey the paper from the paper feeding opening 3 into the printing assembly 11 for printing. The first stepping motor 16 drives the gear on the swing arm main body 17 to rotate. When the gear revolves, the first roller 7 at one end of the swing arm main body 17 is pressed against the friction plate 15. The torque of the swing arm rotating and pressing against the friction plate 15 is stable because the friction force of the first roller 7 on the paper is greater than the friction force of the friction plate 15 on the paper, and the friction force of the friction plate 15 on the paper is greater than the friction force between the papers. Therefore, if there is paper jam, the friction plate 15 will filter out the overlapping papers.

[0029] Embodiment 2: The linkage gear 21 and the second transmission gear set 22 are in meshing connection, the angle between the paper tray 4 and the paper feeding channel 14 is an obtuse angle, and the first sensor 10, the second sensor 12, the first stepping motor 16 and the second stepping motor 20 are all connected to the controller assembly inside the base 1;

[0030] Specifically, as Figure 1 and Figure 3As shown, during the process of the printing component 11 inside the base 1 printing on the paper, the controller component sends a pulse signal to the first stepping motor 16 to drive the first stepping motor 16 to rotate. As a result, the first stepping motor 16 drives the first transmission gear set 18 to transmit power. The transmission shaft 23 passes through the rocker arm body 17 and is connected to the first transmission gear set 18. The first transmission gear set 18 drives the first transmission shaft 23, the first transmission shaft 23 drives the rocker arm body 17, and the rocker arm body 17 drives the first roller 7 to press forward against the paper. Therefore, the first roller 7 can feed the paper into the paper feeding channel 14. Subsequently, after the first sensor 10 inside the base 1 first detects the paper, the second roller 8 starts to roll and feed the paper. Then, the recycling shaft 9 and the supply shaft 13 start to rotate and work, but they do not keep rotating all the time. When the paper leaves the second sensor 12, the second roller 8 stops rotating, and the paper is handed over to the paper discharging unit to be sent out.

[0031] Preferably, the first transmission shaft 23 and the rocker arm body 17 are in interference fit.

[0032] Embodiment 3: The first roller 7 and the second roller 8 have the same rotational speed, and the second roller 8 is located on the upper wall surface of the paper feeding channel 14.

[0033] Specifically, as Figure 1 and Figure 4 shown, the controller inside the printer can control the first roller 7 and the second roller 8 to have the same rotational speed. Due to the reverse slipping effect of the one-way bearing inside the first roller 7, the second roller 8 will drag the first roller 7 to rotate. The passive speed of the first roller 7 is V1 = V2, thus ensuring that the linear speeds of the first roller 7 and the second roller 8 are consistent. A second transmission shaft 24 is provided inside the first roller 7, and the second transmission shaft 24 is connected to the first roller 7 through a one-way bearing 25. The controller sends the same pulse frequency to the first stepping motor 16 and the second stepping motor 20, which can ensure the synchronization of paper feeding, keep the paper in a stretched state all the time, and avoid problems such as paper wrinkling, paper jamming, and paper clogging.

[0034] Working principle: Refer to Figures 1 to 5, when the utility model is in use, the paper is placed on the paper bracket 4, one end is inserted into the inside of the paper inlet opening 3 and contacts the friction piece 15 at the bottom, and the side of the paper contacts the first roller 7. When the first roller 7 rotates, the first roller 7 exposes on one side of the paper inlet opening 3 to grab the paper. A shrapnel 5 is provided on the opposite side of the first roller 7, which can lift the paper to keep the paper in contact with the first roller 7. When feeding paper, the controller sends a pulse signal to the first stepping motor 16 and drives the first stepping motor 16 to rotate, so as to drive the first roller 7 to send the paper into the paper feeding channel 14. When the paper passes through the first sensor 10, the first sensor 10 feeds back the signal to the controller. The controller sends a pulse signal to the second stepping motor 20 and drives the second stepping motor 20, so as to drive the second roller 8 to rotate and send the paper into the printing assembly 11 for printing. At this time, the active linear speed of the outer diameter of the first roller 7 is set as V1, and the active linear speed of the outer diameter of the second roller 8 is set as V2, and V2 > V1; one end of the paper is pressed under the first roller 7, and the other end is pressed under the second roller 8. Due to the reverse slipping effect of the one-way bearing inside the first roller 7, the second roller 8 will drag the first roller 7 to rotate, and the passive speed of the first roller 7 is V1 = V2, so as to ensure that the linear speeds of the first roller 7 and the second roller 8 are the same, preventing the paper from bending and deforming during transportation and jamming. The controller sends the same pulse frequency to the first stepping motor 16 and the second stepping motor 20, which can ensure the synchronization of paper feeding, so that the paper always maintains stretching and rotation, avoiding problems of paper wrinkling, jamming and paper jamming.

[0035] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above exemplary embodiments, and can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-limiting. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be included in the present utility model. Any reference signs in the claims should not be regarded as limiting the claims involved.

Claims

1. An automatic paper feeding structure, comprising a base (1), characterized in that: An internal flip cover (2) is installed at the top of the base (1). A paper tray (4) is installed at one end of the top of the base (1). A paper feed opening (3) is provided between the internal flip cover (2) and the base (1). A paper feed channel (14) is formed between the internal flip cover (2) and the base (1), and the paper feed channel (14) is communicated with the paper feed opening (3). A friction plate (15) is provided at the bottom of the paper feed opening (3). A rocker arm pressing mechanism (6) is provided at the rear side of the internal flip cover (2). A first roller (7) is provided at one end of the rocker arm pressing mechanism (6) close to the paper feed opening (3). Elastic pieces (5) are provided on both sides of the first roller (7). The automatic paper feed structure is provided with a second roller (8). A printing assembly (11) is provided below the second roller (8). A supply shaft (13) is provided at one end of the bottom of the printing assembly (11). A recovery shaft (9) is provided at the other end of the bottom of the printing assembly (11). A first sensor (10) is provided at one end of the second roller (8). A second sensor (12) is provided at the other end of the second roller (8). A linkage gear (21) is installed on one side of the second roller (8). A second stepping motor (20) is installed on one side inside the base (1). A second transmission gear set (22) is installed at the output end of the second stepping motor (20); The rocker arm pressing mechanism (6) includes a rocker arm main body (17). The first roller (7) is movably installed inside the rocker arm main body (17). A first transmission gear set (18) is installed on one side of the rocker arm main body (17). A first stepping motor (16) is installed on the rocker arm main body (17).

2. The automatic paper feeding structure according to claim 1, characterized in that: The first sensor (10), the second sensor (12), the first stepping motor (16) and the second stepping motor (20) are all connected to a controller assembly inside the base (1).

3. The automatic paper feeding structure according to claim 2, wherein: The output end of the first stepping motor (16) is connected to the first transmission gear set (18), and the first roller (7) is pressed against the friction plate (15).

4. An automatic paper feeding structure according to claim 3, characterized in that: The linkage gear (21) is meshed with the second transmission gear set (22), and the angle between the paper tray (4) and the paper feed channel (14) is an obtuse angle.

5. An automatic paper feeding structure according to any one of claims 1 to 4, characterized in that: The rocker arm pressing mechanism (6) includes a first transmission shaft (23). One end of the first transmission shaft (23) is connected to the first transmission gear set (18). The first transmission shaft (23) is inserted into the rocker arm main body (17). The second roller (8) is located on the upper wall surface of the paper feed channel (14).

6. The automatic paper feeding structure according to claim 5, wherein: The rocker arm pressing mechanism (6) includes a second transmission shaft (24), a one-way bearing (25) and a bushing (26). One end of the second transmission shaft (24) is connected to the first transmission gear set (18). The other end of the second transmission shaft (24) is connected with the bushing (26). The bushing (26) is clamped in a clamping opening (27) of the rocker arm main body (17). The second transmission shaft (24) is inserted into the one-way bearing (25), and the one-way bearing (25) is inserted into the first roller (7).

7. An automatic paper feeding structure according to claim 6, characterized in that: The first transmission shaft (23) and the rocker arm body (17) are in interference fit.

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