Automatic paper feeding device with anti-jam mechanism

Abstract

The utility model discloses an automatic paper feeding device with anti -paper jam mechanism relates to printer technical field, including the supporting plate, the symmetrical connecting lug of supporting plate both sides is provided with, is provided with rotary lever in connecting lug, and rotary lever is located one side of the upper section of connecting lug and is provided with the turntable of sleeve, and the rubber skirt is set to the outside of turntable, and the rubber skirt edge is contacted with the surface of supporting plate, and the turntable is set to the top of rotary lever, and the rubber skirt edge of turntable edge abuts against the surface of supporting plate, makes the paper in the moving process can be contacted with the rubber skirt of rotary movement, and the rubber skirt of rotation can drive the paper to enter between rubber skirt and supporting plate, at this moment, the paper not only is subjected to the force of the paper box to the outside delivery behind, but also is subjected to the tension of rubber skirt rotation to the paper, even if the paper surface has the convex grain or the material is relatively soft also will not produce the resistance to the movement of paper, on the contrary, will produce the help of the movement of paper, avoids the paper in paper feeding device and produces the paper jam.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and in particular to an automatic paper feeding device with an anti-paper jam mechanism. Background Technology

[0002] The paper in a printer is usually stored in the paper tray. When the printer is turned on and paper is needed, the paper in the paper tray is fed out through the paper feeding device to the printing area to complete the printing. During this process, the paper may be twisted due to defects in the paper itself or problems with the paper material, causing a paper jam.

[0003] Typically, a paper feeding device consists of a tray that carries the paper and a roller that spans the top of the tray. After the paper enters the tray, it comes into contact with the roller and is restricted by the roller in the vertical direction, so that the paper stays in contact with the tray as it passes the roller. However, if there are raised lines or creases on the paper surface, the paper may not be able to pass through when it comes into contact with the roller, causing the paper to jam at the roller position. Utility Model Content

[0004] To address the aforementioned problems, the purpose of this utility model is to provide an automatic paper feeding device with an anti-jamming mechanism, thereby solving the problem of paper jams occurring when the paper moves within the paper feeding mechanism.

[0005] The technical solution of this utility model is as follows: it includes a paper feeding device disposed between the printing mechanism and the paper tray, with one side of the paper feeding device connected to the paper tray and the other side connected to the printing mechanism; The printing mechanism includes a tray with symmetrical connecting ears on both sides. A rotating rod is installed inside each connecting ear. The rotating rod is inclined towards the tray on the side of the top of the connecting ear. A turntable is sleeved on the side of the upper section of the rotating rod. A rubber skirt is arranged around the outside of the turntable. The edge of the rubber skirt contacts the surface of the tray. A pressing mechanism is provided at the top of the rotating rod. A transmission rod is rotatably connected to the bottom of the tray through a bracket. One end of the transmission rod is connected to a power device. A first gear is symmetrically arranged on the surface of the transmission rod. A second gear that meshes with the first gear is provided at the bottom of the rotating rod.

[0006] Furthermore, the tray has upward protrusions on both sides, which form a restrictive area on the tray surface to allow paper movement. The side of the tray facing the paper box has a downward curvature. The height of the protrusions on the tray surface decreases as the curvature decreases. The curved tray can better accept paper from the paper box, and the protrusions on both sides are at their highest when the paper first enters the tray. Even if the paper is tilted at this time, it can be reset. The curved tray can better receive the paper output from the paper box.

[0007] Furthermore, the connecting ear is connected to the tray via protrusions on both sides of the tray. The connecting ear is located on the side of the tray closest to the printing mechanism, i.e., on the flat side of the tray. A pivot is provided between the connecting ear and the rotating rod to prevent the rotating rod from moving axially. At the same time, when the paper has not completely left the paper tray, the farthest end is less restricted by the conveying device inside the paper tray. The connection ear is provided here to ensure that the position of the structure inside the connecting ear is in an area where the paper is more likely to encounter unexpected situations during the conveying process.

[0008] Furthermore, the rotating rod is symmetrically provided with limiting rings on one side of the top of the connecting ear, with the turntable as the center. The limiting ring at the bottom of the turntable is fixedly connected to the rotating rod, and the other limiting ring is sleeved on the outside of the rotating rod and connected to the pressing mechanism. The two limiting rings can limit the vertical movement range of the turntable.

[0009] Furthermore, the pressing mechanism consists of an annular boss at the top of the rotating rod and a spring at the bottom of the annular boss. The spring is always in a relaxed state. The spring is connected to a limiting ring sleeved on the outside of the rotating rod and pushes the limiting ring to press the turntable. The limiting ring has friction grooves on the side facing the turntable to ensure that the turntable can smoothly follow the rotating rod. When the turntable encounters excessive resistance, it can break free from the friction of the limiting ring and stop following the rotating rod, thereby preventing the rubber skirt on the edge of the turntable from continuously rubbing against the paper and causing paper damage when problems occur during paper feeding.

[0010] Furthermore, the turntable is made entirely of rigid plastic and has a flat-topped conical shape. The rubber skirt at the edge of the turntable is made of flexible rubber material. The flexibility of the rubber skirt is less than the pressure applied to the turntable by the pressing mechanism, ensuring that the rubber skirt can deform better when the pressing mechanism pushes the turntable to increase the contact area with the paper.

[0011] Furthermore, both the first gear and the second gear are bevel gears to ensure transmission efficiency.

[0012] The beneficial effects of this utility model are as follows: 1. This utility model has inclined rotating rods on both sides of the tray and a turntable on the top of the rotating rods. The rubber skirt on the edge of the turntable abuts against the surface of the tray, so that the paper can come into contact with the rotating rubber skirt during the movement. The rotating rubber skirt can drive the paper into the space between the rubber skirt and the tray. At this time, the paper is not only subjected to the force of the paper box being conveyed outward from behind, but also to the pulling force caused by the rotation of the rubber skirt. Even if the paper surface has raised texture or the material is relatively soft, it will not cause resistance to the movement of the paper. On the contrary, it will help the movement of the paper and avoid paper jams in the paper feeding device.

[0013] 2. This utility model also applies downward pressure to the turntable through a pressing mechanism, causing the rubber skirt on the edge of the turntable to deform, thereby making it more closely adhere to the surface of the tray or in contact with the paper. The larger contact area generates more friction, ensuring that the rubber skirt will not spin freely on the smooth paper surface and thus prevent the paper from moving. Even if the paper is thick, the pressing mechanism can retract under the push force feedback from the tray to ensure that thicker paper can pass through smoothly. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the transmission rod structure of this utility model; Figure 3 This is a schematic diagram of the pallet structure of this utility model; Figure 4 This is a schematic diagram showing the connection state between the rotating rod and the transmission rod of this utility model.

[0015] Reference numerals: 1. Support plate; 2. Connecting lug; 3. Rotating rod; 4. Turntable; 5. Rubber skirt; 6. Pressing mechanism; 7. Transmission rod; 8. First gear; 9. Second gear. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0017] like Figure 1-4 As shown, it includes a paper feeding device disposed between the printing mechanism and the paper tray, with one side of the paper feeding device docking with the paper tray and the other side docking with the printing mechanism; The printing mechanism includes a tray 1 with upward protrusions on both sides. These protrusions form a restrictive area on the surface of the tray 1 to facilitate paper movement. The side of the tray 1 facing the paper tray has a downward curvature. The height of the protrusions on the surface of the tray 1 decreases as the curvature decreases. The curved tray 1 can better accept paper from the paper tray, and the protrusions on both sides are at their highest point when the paper first enters the tray 1. Even if the paper is tilted at this time, it can be reset. The curved tray 1 can better receive paper output from the paper tray. The tray 1 has symmetrical connecting ears 2 on both sides, and each connecting ear 2 has a rotating rod 3 inside. The connecting ears 2 are connected to the tray 1 through the protrusions on both sides of the tray 1. The connecting ears 2 are located on the side of the tray 1 closest to the printing mechanism, that is, the flat position of the tray 1. A rotating shaft is provided between the connecting ears 2 and the rotating rod 3 to prevent the rotating rod 3 from moving axially. At the same time, when the paper has not completely left the paper tray, the farthest end is less restricted by the conveying device inside the paper tray. The connection ears 2 are located here to ensure that the position of the structure inside the connecting ears 2 is in the area where the paper is more likely to encounter unexpected situations during the conveying process. The rotating rod 3 is tilted towards the support plate 1 on one side of the top of the connecting ear 2. The rotating rod 3 is fitted with a turntable 4 on one side of the upper section of the connecting ear 2. The rotating rod 3 is symmetrically arranged with the turntable 4 as the center on one side of the top of the connecting ear 2. The limiting ring at the bottom of the turntable 4 is fixedly connected to the rotating rod 3. The other limiting ring is fitted on the outside of the rotating rod 3 and connected to the pressing mechanism 6. The two limiting rings can limit the vertical movement range of the turntable 4. A rubber skirt 5 is provided around the outer side of the turntable 4. The edge of the rubber skirt 5 contacts the surface of the tray 1. A pressing mechanism 6 is provided at the top of the rotating rod 3. The turntable 4 is made of rigid plastic and is flat-topped and conical. The rubber skirt 5 on the edge of the turntable 4 is made of flexible rubber material. The flexibility of the rubber skirt 5 is less than the pressure applied to the turntable 4 by the pressing mechanism 6, which ensures that the rubber skirt 5 can deform better when the pressing mechanism 6 pushes the turntable 4 to increase the contact area with the paper. The pressing mechanism 6 consists of an annular boss at the top of the rotating rod 3 and a spring at the bottom of the annular boss. The spring is always in a relaxed state. The spring is connected to a limiting ring sleeved on the outside of the rotating rod 3 and pushes the limiting ring to press the turntable 4. The side of the limiting ring facing the turntable 4 is provided with friction texture to ensure that the turntable 4 can smoothly follow the rotating rod 3 to rotate. When the turntable 4 is subjected to excessive resistance, it can break away from the friction of the limiting ring and not follow the rotating rod 3 to rotate. This avoids the rubber skirt 5 on the edge of the turntable 4 from continuously rubbing against the paper and causing paper damage when problems occur during paper feeding. The bottom of the pallet 1 is rotatably connected to a transmission rod 7 via a bracket. One end of the transmission rod 7 is connected to a power device. A first gear 8 is symmetrically arranged on the surface of the transmission rod 7. A second gear 9 that meshes with the first gear 8 is arranged at the bottom of the rotating rod 3. Both the first gear 8 and the second gear 9 are bevel gears to ensure transmission efficiency.

[0018] Working principle of this utility model: When the device is started, the printing mechanism and the paper tray start simultaneously. The power device drives the rotating rod 3 to rotate. When the rotating rod 3 rotates, the first gear 8 meshes with the second gear 9 to drive the rotating rod 3 to rotate. At this time, the turntable 4 on the surface of the rotating rod 3, the rubber skirt 5, and the pressing mechanism 6 rotate synchronously. The paper inside the paper box enters the surface of the pallet 1 under the conveying of the paper box, and continues to move to the other side of the pallet 1. During the movement, the paper will come into contact with the rotating rubber skirt 5, and the rotating rubber skirt 5 will clamp the paper between itself and the pallet 1 and convey it in the direction of rotation under the action of rotation. When the creases on the paper surface pass through the rubber skirt 5, the rubber skirt 5 deforms due to the pushing force of the pressing mechanism 6. The contact area between the rubber skirt 5 and the paper is sufficient to ensure that the creases are covered in a range. The paper in the covered area is subjected to the same force. Therefore, the paper will not bend along the creases when it is conveyed through the rubber skirt 5, thus preventing paper jams. When the paper surface has texture or is too thick, the rubber skirt 5 will be lifted upward by the paper, which will push the turntable 4 upward to push the pressing mechanism 6 to retract, thus ensuring that the rubber skirt 5 itself has enough upward movement space to allow the paper to pass through and prevent paper jams.

[0019] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An automatic paper feeding device with an anti-paper jam mechanism, comprising a paper feeding device disposed between a printing mechanism and a paper tray, wherein one side of the paper feeding device is connected to the paper tray and the other side is connected to the printing mechanism; The printing mechanism includes a tray (1), characterized in that: The pallet (1) is provided with connecting ears (2) symmetrically on both sides. A rotating rod (3) is provided in each connecting ear (2). The rotating rod (3) is inclined towards the pallet (1) on the side of the top of the connecting ear (2). A turntable (4) is sleeved on the side of the upper section of the rotating rod (3). A rubber skirt (5) is provided around the outside of the turntable (4). The edge of the rubber skirt (5) is in contact with the surface of the pallet (1). A pressing mechanism (6) is provided at the top of the rotating rod (3). A transmission rod (7) is rotatably connected to the bottom of the pallet (1) through a bracket. One end of the transmission rod (7) is connected to a power device. A first gear (8) is symmetrically provided on the surface of the transmission rod (7). A second gear (9) meshing with the first gear (8) is provided at the bottom of the rotating rod (3).

2. The automatic paper feeding device with an anti-jamming mechanism according to claim 1, characterized in that: The tray (1) has upward protrusions on both sides, which form a restrictive area on the surface of the tray (1) to allow paper movement. The side of the tray (1) facing the paper box has a downward curvature, and the height of the protrusions on the surface of the tray (1) decreases as the curvature decreases.

3. An automatic paper feeding device with an anti-jamming mechanism according to claim 2, characterized in that: The connecting ear (2) is connected to the tray (1) through the protrusions on both sides of the tray (1). The connecting ear (2) is located on the side of the tray (1) near the printing mechanism, i.e., on the flat side of the tray (1). A rotating shaft is provided between the connecting ear (2) and the rotating rod (3).

4. An automatic paper feeding device with an anti-jamming mechanism according to claim 1, characterized in that: The rotating rod (3) is located on one side of the top of the connecting ear (2) and is symmetrically arranged with the turntable (4) as the center. The limiting ring located at the bottom of the turntable (4) is fixedly connected to the rotating rod (3), and the other limiting ring is sleeved on the outside of the rotating rod (3) and connected to the pressing mechanism (6).

5. An automatic paper feeding device with an anti-jamming mechanism according to claim 4, characterized in that: The pressing mechanism (6) consists of an annular boss at the top of the rotating rod (3) and a spring at the bottom of the annular boss. The spring is always in a relaxed state. The spring is connected to a limiting ring sleeved on the outside of the rotating rod (3) and pushes the limiting ring to press the turntable (4).

6. An automatic paper feeding device with an anti-jamming mechanism according to claim 5, characterized in that: The turntable (4) is made of hard plastic and has a flat-topped cone shape. The rubber skirt (5) on the edge of the turntable (4) is made of flexible rubber material. The flexibility of the rubber skirt (5) is less than the pressure applied to the turntable (4) by the pressing mechanism (6).

7. An automatic paper feeding device with an anti-jamming mechanism according to claim 1, characterized in that: Both the first gear (8) and the second gear (9) are bevel gears.

Images