Paper pressing mechanism of printer

Abstract

The printer paper pressing mechanism comprises a printer body and a printing channel arranged in the printer body, a printing area of the printing channel is provided with a printing head, and the printing head is used for printing paper passing through the printing area; the two paper pressing sheets are arranged in the printing area of the printing channel, located on the two sides of the printing head correspondingly and used for pressing the two sides of the paper passing through the printing area, the side edges of the paper are prevented from being folded when the printing head conducts printing, and meanwhile paper feeding and clamping caused by the fact that the head of the paper is rolled up can be prevented. The two paper pressing sheets are arranged in the printing area of the printing channel, when paper passes through the printing area, the two sides of the paper can be pressed below the paper pressing sheets, in this way, when the printing head conducts reciprocating printing, the side edges of the paper cannot be folded, the paper clamping probability is reduced, and the working efficiency of the printer is improved.

Description

Technical Field

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

[0002] With the development of technology and the advancement of educational big data, various electronic marking devices have become highly sophisticated, and automatic marking is becoming increasingly common in current teaching marking scenarios. Automatic marking refers to digitizing students' exam papers using a scanner. Simultaneously, it automatically identifies the answers students have filled in, performs data comparison and calculation through a computing module, and finally prints the results onto the assignment or exam paper. This not only reduces the workload of teachers in grading papers but also leaves marking marks on the original paper, facilitating subsequent explanations by teachers and review by students.

[0003] Because the exam papers will inevitably wrinkle to some extent during the students' answering process, resulting in uneven paper, the reciprocating motion of the print head can easily fold up the sides of the paper when it is printed, leading to paper jams and affecting the printer's efficiency. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a printer paper pressing mechanism that presses the two sides of the paper together during printing to prevent the sides of the paper from being folded up.

[0005] The technical solution of this utility model is to provide a printer paper pressing mechanism with the following structure:

[0006] The printer includes a printer body and a printing channel disposed within the printer body. The printing area of ​​the printing channel is equipped with a print head, which is used to print on paper passing through the printing area. The printing area of ​​the printing channel is equipped with two paper pressing plates, which are located on both sides of the print head and are used to press down on both sides of the paper passing through the printing area to prevent the print head from folding the sides of the paper during printing.

[0007] By adopting the above structure, the printer paper pressing mechanism of this utility model has the following advantages compared with the prior art:

[0008] Two paper clamps are installed within the printing area of ​​the print path. As the paper passes through the printing area, its sides are pressed under the paper clamps. This prevents the print head from folding up the sides of the paper during reciprocating printing, thus reducing the probability of paper jams and improving printer efficiency. Additionally, the two paper clamps also prevent paper jams caused by the paper tip curling up.

[0009] Preferably, the printer body is provided with a slide rail extending along the width direction of the printing channel, and the upper end of the paper pressure piece is connected to a slide block, which is slidably connected to the slide rail. The printer body is also provided with a drive assembly, which is kinetically connected to the two slide blocks and is used to drive the two slide blocks to move towards or in opposite directions. By driving the two slide blocks to move towards or in opposite directions along the slide rail by the drive assembly, the two paper pressure pieces can be driven to move towards or in opposite directions, thereby adjusting the width between the two paper pressure pieces to accommodate paper of different widths.

[0010] Preferably, the slide rail is provided with slots at both the upper and lower ends, the slots extend along the length of the slide rail and penetrate through both ends of the slide rail; the slide block is provided with a locking part corresponding to each of the two slots, which is used to lock into the slots to prevent the slide block from falling off the slide rail.

[0011] Preferably, the drive assembly includes a drive motor, a driven pulley, and a transmission belt. The drive motor and the driven pulley are located on opposite sides of the printing channel. A drive pulley is connected to the output shaft of the drive motor. The transmission belt is connected to the drive pulley and the driven pulley. The two slides are connected to the upper and lower end faces of the belt, respectively. This allows the two slides to move in opposite directions when the drive motor drives the belt to rotate.

[0012] Preferably, the drive assembly further includes a tension block connected inside the printer body, and the shaft of the driven wheel is rotatably connected to the tension block; the tension block is provided with an elongated hole extending along its length direction for adjusting the installation position of the tension block, thereby adjusting the tension of the drive belt.

[0013] Preferably, the transmission belt has toothed grooves, and the drive pulley has protruding teeth that mesh with the toothed grooves. This prevents slippage between the drive pulley and the transmission belt, thus avoiding inaccurate width adjustment.

[0014] Preferably, the paper pressing plate includes a vertical connecting part, a bending part and a horizontal pressing part connected in sequence; the vertical connecting part is fixedly connected to the slide, and the bending part is inclined in the paper conveying direction and forms an angle with the bottom of the printing channel to facilitate the paper to enter below the horizontal pressing part.

[0015] Preferably, the printer body is equipped with an initial position sensor located on the movement trajectory of the slide, used to detect whether the paper pressure plates on the slide are in the initial position. When the user needs to adjust the position of the two paper pressure plates according to the paper width, the drive assembly can first move the slide to the initial position sensor. After the initial position sensor detects the slide, it can determine that the paper pressure plates are in the initial position. Using this position as the origin, the drive assembly then drives the slide to move a set distance so that the paper pressure plates can accurately reach the set position. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model.

[0017] Figure 2 This is a cross-sectional view of the present invention.

[0018] Figure 3 This is a partial structural schematic diagram of the present invention.

[0019] Figure 4 for Figure 3 A magnified view of a portion of the image.

[0020] Figure 5 This is a schematic diagram of the structure of the medium-pressure paper sheet of this utility model.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Printer body, 2. Printing channel, 3. Print head, 4. Paper clamp, 41. Vertical connecting part, 42. Bending part, 43. Horizontal clamping part, 5. Slide rail, 51. Slot, 6. Slide block, 7. Drive assembly, 71. Drive motor, 72. Driven wheel, 73. Drive belt, 731. Toothed groove, 74. Drive wheel, 741. Raised tooth, 75. Tensioning block, 751. Oblong hole. Detailed Implementation

[0023] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0024] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. At the same time, the terms "first", "second", etc., are only used to distinguish the names of various components and do not have a primary or secondary relationship. Therefore, they should not be construed as limitations on this utility model.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown;

[0026] This utility model discloses a printer paper pressing mechanism: including a printer body 1 and a printing channel 2 disposed in the printer body 1. The printing area of ​​the printing channel 2 is provided with a print head 3, which is used to print paper passing through the printing area.

[0027] Two paper clamping plates 4 are provided in the printing area of ​​the printing channel 2. The two paper clamping plates 4 are located on both sides of the print head 3, and are used to press down on both sides of the paper passing through the printing area to prevent the print head 3 from folding up the sides of the paper during printing. The two paper clamping plates 4 can also prevent paper jams caused by the paper head curling up.

[0028] The printer body 1 is provided with a slide rail 5 extending along the width of the printing channel 2. The upper end of the paper pressure plate 4 is connected to a slide block 6, which is slidably connected to the slide rail 5. The printer body 1 is also provided with a drive assembly 7, which is connected to the two slide blocks 6 for driving the two slide blocks 6 to move in opposite directions.

[0029] The paper pressing plate 4 includes a vertical connecting part 41, a bending part 42 and a horizontal pressing part 43 connected in sequence; the vertical connecting part 41 is fixedly connected to the slide 6, and the bending part 42 is inclined in the paper transport direction and forms an angle with the bottom of the printing channel 2, so that the paper can enter under the horizontal pressing part 43.

[0030] This invention features two paper-pressing plates 4 within the printing area of ​​the printing channel 2. When paper passes through the printing area, it enters below the horizontal pressing part 43 from the angle between the bending part 42 and the bottom of the printing channel 2, thus pressing both ends down. This prevents the print head from folding the sides of the paper during reciprocating printing, reducing the probability of paper jams and improving printer efficiency. The drive assembly 7 can drive two slides 6 to move in opposite directions along the slide rail 5, thereby causing the two paper-pressing plates 4 to move in opposite directions as well, adjusting the width between the two paper-pressing plates 4 to accommodate paper of different widths.

[0031] Preferably, the upper and lower ends of the slide rail 5 are provided with slots 51, which extend along the length of the slide rail 5 and penetrate through both ends of the slide rail 5 to facilitate the engagement of the slide block 6; the slide block 6 is provided with a locking part that corresponds one-to-one with the two slots 51, which can be locked into the slots 51 from the end of the slide rail 5 to prevent the slide block 6 from falling off the slide rail 5 when sliding.

[0032] The drive assembly 7 includes a drive motor 71 (e.g., a stepper motor), a driven wheel 72, and a transmission belt 73. The drive motor 71 and the driven wheel 72 are located on opposite sides of the printing channel 2. A drive wheel 74 is connected to the output shaft of the drive motor 71. The transmission belt 73 is connected to the drive wheel 74 and the driven wheel 72. Two slides 6 are connected to the upper and lower end faces of the belt 73, respectively. This allows the two slides 6 to move synchronously in opposite directions when the drive motor 71 drives the belt 73 to rotate.

[0033] The drive assembly 7 also includes a tension block 75 connected inside the printer body 1. The shaft of the driven wheel 72 is rotatably connected to the tension block 75. The tension block 75 is provided with an elongated hole 751 extending along its length. The tension block 75 is fixed inside the printer body 1 by screws passing through the elongated hole 751. The elongated hole 751 allows the user to easily adjust the installation position of the tension block 75, thereby adjusting the tension of the drive belt 73.

[0034] The transmission belt 73 is provided with a toothed groove 731, and the drive pulley 74 is provided with a toothed protrusion 741. The toothed protrusion 741 meshes with the toothed groove 731, which can prevent slippage between the drive pulley 74 and the transmission belt 73 during transmission, thereby avoiding inaccurate width adjustment.

[0035] An initial position sensor (not shown in the figure) is installed inside the printer body 1 along the moving trajectory of the slide 6 to detect whether the paper pressure piece 4 is in the initial position. When the user needs to adjust the position of the two paper pressure pieces 4 according to the paper width, the slide 6 can be moved to the initial position sensor by the drive assembly 7. After the initial position sensor detects the slide 6, it can determine that the paper pressure piece 4 is in the initial position. Using this position as the origin, the drive assembly 7 drives the slide 6 to move the corresponding distance so that the paper pressure piece 4 can accurately reach the set position.

[0036] The above description is only a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A printer paper pressing mechanism, comprising a printer body (1) and a printing channel (2) disposed within the printer body (1), wherein a print head (3) is provided in the printing area of ​​the printing channel (2), and the print head (3) is used to print paper passing through the printing area; characterized in that: The printing area of ​​the printing channel (2) is provided with two paper pressing plates (4). The two paper pressing plates (4) are located on both sides of the print head (3) and are used to press the paper on both sides of the paper passing through the printing area to prevent the print head (3) from folding the paper side when printing.

2. The printer paper feed mechanism of claim 1, wherein: The printer body (1) is provided with a slide rail (5) extending along the width direction of the printing channel (2). The upper end of the paper pressing plate (4) is connected to a slide block (6), which is slidably connected to the slide rail (5). The printer body (1) is also provided with a drive assembly (7), which is connected to the two slide blocks (6) for driving the two slide blocks (6) to move towards or away from each other.

3. The printer paper feed mechanism of claim 2, wherein: The upper and lower ends of the slide rail (5) are provided with slots (51). The slots (51) extend along the length of the slide rail (5) and penetrate through both ends. The slide block (6) is provided with a snap-fit ​​part corresponding to the two slots (51) to snap into the slots (51) and prevent the slide block (6) from falling off the slide rail (5).

4. A printer paper feed mechanism according to claim 2 or 3, wherein: The drive assembly (7) includes a drive motor (71), a driven wheel (72), and a transmission belt (73). The drive motor (71) and the driven wheel (72) are located on both sides of the printing channel (2). The output shaft of the drive motor (71) is connected to a drive wheel (74). The transmission belt (73) is connected to the drive wheel (74) and the driven wheel (72). The two slides (6) are connected to the upper and lower end faces of the belt (73).

5. The printer paper feed mechanism of claim 4, wherein: The drive assembly (7) also includes a tension block (75) connected inside the printer body (1), and the shaft of the driven wheel (72) is rotatably connected to the tension block (75); the tension block (75) is provided with an elongated hole (751) extending along its length direction, which is used to adjust the installation position of the tension block (75) and thereby adjust the tension of the transmission belt (73).

6. The printer paper feed mechanism of claim 4, wherein: The transmission belt (73) is provided with a toothed groove (731), and the drive wheel (74) is provided with a toothed protrusion (741), which meshes with the toothed groove (731).

7. The printer paper feed mechanism of claim 2, wherein: The paper pressing plate (4) includes a vertical connecting part (41), a bending part (42) and a horizontal pressing part (43) connected in sequence; the vertical connecting part (41) is fixedly connected to the slide (6), the bending part (42) is inclined in the paper conveying direction and forms an angle with the bottom of the printing channel (2) to facilitate the paper to enter below the horizontal pressing part (43).

8. The printer paper feed mechanism of claim 2, wherein: The printer body (1) is equipped with an initial position sensor located on the moving trajectory of the slide (6) to detect whether the paper pressure piece (4) on the slide (6) is in the initial position.

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