Roll paper conveying structure and thermal printer

Abstract

The utility model discloses a kind of paper rolling conveying structures, and disclosed with the heat-sensitive printer of paper rolling conveying structure, wherein paper rolling conveying structure includes shell, swing bar and drive slide, shell is provided with the paper reservoir for built-in printing paper, both sides of paper reservoir are provided with through hole;One end of swing bar is provided with protrusion, other end is provided with connecting portion, protrusion can extend into through hole, and and paper tube rotation cooperation, the stem of swing bar and shell rotation connection, to make swing bar can pivot on shell;End of drive slide and connecting portion movably connect, drive slide and shell are slidably connected;Wherein, swing bar is provided with two, two swing bars are symmetrically connected at the both ends of drive slide, when drive slide slides, drive slide can drive swing bar swing, to make protrusion extend into or out of through hole. Through two protrusions prop up paper tube, make interval between paper tube and paper reservoir, avoid friction between printing paper and paper reservoir, reduce the friction of print head, improve the life of print head.

Description

Technical Field

[0001] This utility model relates to the field of printers, and in particular to a paper conveying structure and a thermal printer. Background Technology

[0002] Most thermal smart cloud printers on the market load thermal paper directly into the paper tray for printing. The paper directly contacts and rubs against the inside of the paper tray. When the print head prints the information onto the paper through the rotating rubber roller, the friction between the print head and the paper increases. Long-term printing will reduce the lifespan of the print head. Utility Model Content

[0003] This invention aims to solve at least one of the technical problems existing in the prior art. To this end, this invention proposes a paper feeding structure that can improve the lifespan of the printhead.

[0004] This utility model also proposes a thermal printer having the above-mentioned paper conveying structure.

[0005] According to a first aspect embodiment of the present invention, a paper conveying structure includes a housing, a rocker arm, and a drive slider. The housing is provided with a paper tray for storing printing paper, and through holes are provided on both sides of the paper tray. One end of the rocker arm is provided with a protrusion, and the other end is provided with a connecting part. The protrusion can extend into the through hole and rotate with the paper tube. The rod body of the rocker arm is rotatably connected to the housing so that the rocker arm can pivot on the housing. The end of the drive slider is movably connected to the connecting part, and the drive slider is slidably connected to the housing. There are two rocker arms, which are symmetrically connected to the two ends of the drive slider. When the drive slider slides, the drive slider can drive the rocker arm to swing, so that the protrusion extends into or exits the through hole.

[0006] The paper conveying structure according to the embodiments of this utility model has at least the following beneficial effects:

[0007] 1. The paper tube is easily disassembled or assembled by driving the sliding slider to simultaneously drive the swing rods on both sides.

[0008] 2. By supporting the paper tube with two protrusions, a gap can be created between the paper tube and the paper tray, avoiding friction between the printing paper and the paper tray, reducing the friction of the print head, and improving the life of the print head.

[0009] According to some embodiments of the present invention, the connecting part is provided with an oblong hole, and the two ends of the driving slider are provided with cylinders. The cylinders are embedded in the oblong hole, the cylinders can rotate in the oblong hole, and the cylinders can slide along the length direction of the oblong hole.

[0010] According to some embodiments of this utility model, the swing rod is L-shaped, and a rotating pin is rotatably connected at the right angle of the swing rod, so the rotating pin is fixedly connected to the housing, and the recesses of the two swing rods are arranged opposite to each other.

[0011] According to some embodiments of the present invention, the housing is fixedly provided with an elastic pressure plate, the elastic pressure plate is horizontally arranged on the upper part of the swing rod, and the side of the elastic pressure plate facing the swing rod is provided with an abutting protrusion;

[0012] When the protrusion is inserted into the through hole, the abutting protrusion abuts against the upper surface of the swing rod; when the protrusion is dislodged from the through hole, the abutting protrusion abuts against the inner side of the swing rod.

[0013] According to some embodiments of this utility model, the housing is provided with two hooks, which are arranged in parallel, and the drive slider is provided with two straight grooves. The straight grooves are engaged with the hooks, and the hooks are slidably connected to the straight grooves.

[0014] According to some embodiments of the present invention, an installation plate is provided inside the housing, the paper tray is disposed on the upper surface of the installation plate, and the swing arm and the drive slider are disposed on the lower surface of the installation plate.

[0015] According to some embodiments of the present invention, the mounting plate is provided with a limiting member, the driving slider is provided with a limiting groove, and the limiting member can only slide back and forth along a fixed path in the limiting groove to constrain the movement path of the driving slider.

[0016] According to some embodiments of the present invention, the driving slider is fixedly connected to two straight rods, which are spaced apart to form the limiting groove. The ends of the straight rods are provided with limiting protrusions, and the distance between the two limiting protrusions is less than the width of the limiting member.

[0017] According to some embodiments of the present invention, a lever is fixedly connected to any one end of the driving slider, a sliding groove is provided on the upper surface of the mounting plate, the lever is built into the sliding groove, and the lever can slide back and forth in the sliding groove.

[0018] A thermal printer according to a second aspect of the present invention includes a main body, a cover, and a paper conveying structure according to a first aspect of the present invention. The cover and the main body are rotatably connected, the cover can cover the main body and close the main body, and the paper conveying structure is installed in the main body.

[0019] The thermal printer according to the embodiments of the present invention has at least the following beneficial effects:

[0020] 1. The paper tube is easily disassembled or assembled by driving the sliding slider to simultaneously drive the swing rods on both sides.

[0021] 2. The two protrusions support the paper tube, which can create a gap between the paper tube and the paper tray, preventing friction between the printing paper and the paper tray.

[0022] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:

[0024] Figure 1 This is a schematic diagram of a thermal printer according to an embodiment of the present utility model;

[0025] Figure 2 This is a schematic diagram of the paper conveying structure in one direction according to an embodiment of the present invention;

[0026] Figure 3 One direction (and) of the paper conveying structure (with printing paper) of this utility model embodiment Figure 2 A schematic diagram (in the same direction);

[0027] Figure 4 This is a schematic diagram of the paper conveying structure in one working state from another direction according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of another direction in another working state of the paper conveying structure according to an embodiment of the present invention;

[0029] Figure 6 for Figure 5 An enlarged view of part B.

[0030] 1. Printing paper;

[0031] 10. Paper conveying structure;

[0032] 100. Housing; 110. Paper tray; 120. Through hole; 130. Hook; 140. Elastic pressure plate; 141. Abutting protrusion; 150. Mounting plate; 160. Sliding groove;

[0033] 200, rocker arm; 210, protrusion; 220, connecting part; 221, oblong hole; 230, rotating pin;

[0034] 300. Drive slider; 310. Cylinder; 330. Linear groove; 340. Limiting groove; 350. Limiting component; 360. Straight rod; 361. Limiting protrusion; 370. Pulley;

[0035] 20. Cover;

[0036] 30. Main body; Detailed Implementation

[0037] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0038] In the description of this utility model, it should be understood that the directional descriptions, such as up, down, front, back, left, right, etc., indicate the directional or positional relationship based on the directional 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.

[0039] In the description of this utility model, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. If "first" or "second" is used in the description, it is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0040] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0041] Reference Figure 1 The thermal printer of this utility model embodiment includes a main body 30, a cover 20 and a paper conveying structure 10. The cover 20 and the main body 30 are rotatably connected. The cover 20 can cover the main body 30 and close the main body 30. The paper conveying structure 10 is installed in the main body 30.

[0042] Among them, reference Figures 2 to 4The paper conveying structure 10 of this utility model embodiment includes a housing 100, a rocker arm 200, and a driving slider 300. The housing 100 is provided with a paper tray 110 for storing printing paper 1. Through holes 120 are provided on both sides of the paper tray 110. One end of the rocker arm 200 is provided with a protrusion 210, and the other end is provided with a connecting part 220. The protrusion 210 can extend into the through hole 120 and rotate with the paper tube. The rod body of the rocker arm 200 is rotatably connected to the housing 100 so that the rocker arm 200 can pivot on the housing 100. The end of the driving slider 300 is movably connected to the connecting part 220, and the driving slider 300 is slidably connected to the housing 100. There are two rocker arms 200, which are symmetrically connected to the two ends of the driving slider 300. When the driving slider 300 slides, the driving slider 300 can drive the rocker arm 200 to swing so that the protrusion 210 extends into or exits the through hole 120.

[0043] In actual use, when it is necessary to install or remove the paper tube, the sliding drive slider 300 is slidable. The drive slider 300 slides on the housing 100. Since the two swing rods 200 are symmetrically connected to the two ends of the drive slider 300, the sliding of the drive slider 300 will drive the swing rods 200 to pivot around the rotation connection point between them and the housing 100.

[0044] Specifically, when the drive slider 300 moves to one side ( Figure 4 When the slide is in the A2 direction, the protrusion 210 of the rocker arm 200 extends into the through hole 120 and into the paper tube to rotate and engage with the paper tube, thereby supporting the paper tube and separating the entire printing paper 1 and the paper tray 110; while when the drive slider 300 moves to the other side ( Figure 4 When the paper tube slides (A1 direction), the swing arm 200 swings, causing the protrusion 210 to disengage from the through hole 120. The paper tube loses its support and falls into the paper tray 110. The user can directly pick up the paper tube and replace it with a new one, facilitating the disassembly of the paper tube. Therefore, in the paper conveying structure 10 of this embodiment, the swing arms 200 on both sides are driven to swing simultaneously by a single drive slider 300, making it convenient and quick to complete the disassembly or assembly of the paper tube. The two protrusions 210 support the paper tube, forming a movable support structure, while also creating a gap between the paper tube and the paper tray 110. This effectively prevents the printing paper 1 from rubbing against the paper tray 110 during the conveying process, reducing paper wear and conveying resistance, thereby reducing the friction of the print head and improving the life of the print head.

[0045] To avoid motion interference between the drive slider 300 and the rocker arm 200, in some embodiments, reference is made to... Figure 4 and Figure 5The connecting part 220 is provided with an oblong hole 221, and the two ends of the driving slider 300 are provided with cylinders 310. The cylinders 310 are embedded in the oblong hole 221, and the cylinders 310 can rotate in the oblong hole 221 and slide along the length direction of the oblong hole 221. When the drive slider 300 slides, the cylinder 310 slides along its length within the oblong hole 221. Simultaneously, due to the swing of the rocker arm 200, the cylinder 310 can rotate within the oblong hole 221 to adapt to changes in the position and angle of the connecting part 220 during the swing of the rocker arm 200. This ensures smooth movement between the drive slider 300 and the rocker arm 200. During the movement, the connection between the drive slider 300 and the rocker arm 200 is effectively made flexible. It can transmit the driving force of the drive slider 300 and allow the rocker arm 200 to adjust its angle and move its position during the swing. This reduces stress concentration at the connecting part 220 and avoids motion interference, thus improving the reliability and service life of the structure.

[0046] Preferably, refer to Figure 4 and Figure 5 The swing arm 200 is L-shaped, and a rotating pin 230 is rotatably connected to the right angle of the swing arm 200, so the rotating pin 230 is fixedly connected to the housing 100. The recesses of the two swing arms 200 are arranged opposite each other. The swing arm 200 pivots around the rotating pin 230 as the fulcrum. When the driving slider 300 drives the swing arm 200 to swing, the protrusion 210 at one end of the L-shaped swing arm 200 extends into or out of the through hole 120. Since the recesses of the two swing arms 200 are arranged opposite each other, when the protrusion 210 extends into the through hole 120 to support the paper tube, the structure of the L-shaped swing arm 200 can provide stable support force. In addition, during the reciprocating motion of the driving slider 300, the lever principle is used, with the rotating pin 230 as the fulcrum and the two ends of the swing arm 200 as the force receiving point and the point of application, respectively. The driving force of the driving slider 300 is transmitted to the protrusion 210 through the swing arm 200, realizing the support and release of the paper tube.

[0047] In some embodiments, refer to Figure 4 and Figure 5 The housing 100 is fixedly provided with an elastic pressure plate 140, which is horizontally arranged on the upper part of the swing rod 200. The elastic pressure plate 140 is provided with an abutting protrusion 141 on the side facing the swing rod 200. When the protrusion 210 is inserted into the through hole 120, the abutting protrusion 141 abuts against the upper surface of the swing rod 200; when the protrusion 210 is dislodged from the through hole 120, the abutting protrusion 141 abuts against the inner side of the swing rod 200.

[0048] In practical use, refer to Figure 4 and Figure 5When the protrusion 210 is inserted into the through hole 120 to support the paper tube, the swing rod 200 is in a supported state. The abutting protrusion 141 of the elastic pressure plate 140 abuts against the upper surface of the swing rod 200. The elastic force of the elastic pressure plate 140 applies a downward pressure to the swing rod 200, so that the swing rod 200 maintains a stable supported position. When the protrusion 210 is dislodged from the through hole 120, the swing rod 200 swings to another position. The abutting protrusion 141 abuts against the inner side of the swing rod 200. Similarly, the elastic force restricts the position of the swing rod 200, preventing the swing rod 200 from shaking randomly.

[0049] It is worth mentioning that, referring to Figure 4 and Figure 5 To install the drive slider 300 and constrain its sliding path, the housing 100 is provided with two hooks 130, which are arranged in parallel. The drive slider 300 is provided with two straight grooves 330, which engage with the hooks 130, and the hooks 130 and the straight grooves 330 are slidably connected. When the drive slider 300 slides, the hooks 130 slide along the direction of the grooves within the straight grooves 330. The engagement between the hooks 130 and the straight grooves 330 restricts the direction of movement of the drive slider 300, allowing it to slide in a straight line only along the parallel direction of the hooks 130. This ensures the accuracy of the drive slider 300's movement path and prevents it from deviating or wobbling during sliding, improving the stability and accuracy of the drive slider 300's movement, and thus ensuring the synchronicity and consistency of the swing arm 200's swing.

[0050] Preferably, in some embodiments, reference is made to Figure 4 and Figure 5 The housing 100 has an internal mounting plate 150, a paper tray 110 is located on the upper surface of the mounting plate 150, and a rocker arm 200 and a drive slider 300 are located on the lower surface of the mounting plate 150.

[0051] On the other hand, to further constrain the movement path of the drive slider 300, the mounting plate 150 is provided with a limiting member 350, and the drive slider 300 is provided with a limiting groove 340. The limiting member 350 can only slide back and forth along a fixed path in the limiting groove 340 to constrain the movement path of the drive slider 300. During the movement of the drive slider 300, the cooperation between the limiting member 350 and the limiting groove 340 precisely constrains the movement path of the drive slider 300, preventing the drive slider 300 from deviating or jamming during sliding, ensuring the accuracy and stability of the movement of the drive slider 300, and thus ensuring the consistency and reliability of the swing arm 200.

[0052] Preferably, as a further optimization of the above embodiments, refer to Figure 4 , Figure 5 Figure 6The drive slider 300 is fixedly connected to two straight rods 360, which are spaced apart to form a limiting groove 340. Each straight rod 360 has a limiting protrusion 361 at its end, and the distance between the two limiting protrusions 361 is less than the width of the limiting member 350. (Refer to...) Figure 4 The limiting groove 340 constructed by the straight rod 360 achieves the constraint on the sliding path of the driving slider 300. Specifically, refer to... Figure 5 When the swing arm 200 is in the working state of supporting the paper tube, the drive slider 300 is reliably fixed, avoiding the drive slider 300 from sliding out of the limit groove 340 due to external forces or other factors, thus ensuring the stability and reliability of the paper conveying structure 10 during operation.

[0053] It should be mentioned that since the user cannot access the drive slider 300 from the bottom of the mounting plate 150, therefore, refer to... Figure 2 and Figure 3 In some embodiments, a lever 370 is fixedly connected to either end of the drive slider 300. A sliding groove 160 is provided on the upper surface of the mounting plate 150, and the lever 370 is housed within the sliding groove 160, allowing it to slide back and forth within the groove. When the drive slider 300 needs to be moved, the lever 370 is manually moved, causing it to slide back and forth within the sliding groove 160, thus moving the drive slider 300 together, facilitating user operation.

[0054] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present utility model.

Claims

1. A paper conveying structure, characterized in that, include: The housing (100) is provided with a paper tray (110) for storing printing paper (1), and through holes (120) are provided on both sides of the paper tray (110); The swing rod (200) has a protrusion (210) at one end and a connecting part (220) at the other end. The protrusion (210) can extend into the through hole (120) and rotate with the paper tube. The rod body of the swing rod (200) is rotatably connected to the housing (100) so that the swing rod (200) can pivot on the housing (100). The drive slider (300) is movably connected at its end to the connecting part (220), and the drive slider (300) is slidably connected to the housing (100); There are two swing rods (200), which are symmetrically connected to the two ends of the drive slider (300). When the drive slider (300) slides, the drive slider (300) can drive the swing rods (200) to swing, so that the protrusion (210) extends into or exits the through hole (120).

2. The paper conveying structure according to claim 1, characterized in that, The connecting part (220) is provided with an oblong hole (221), and the two ends of the driving slider (300) are provided with cylinders (310). The cylinders (310) are embedded in the oblong hole (221), and the cylinders (310) can rotate in the oblong hole (221) and slide along the length direction of the oblong hole (221).

3. The paper conveying structure according to claim 1, characterized in that, The swing rod (200) is L-shaped, and a rotating pin (230) is rotatably connected at the right angle of the swing rod (200). Therefore, the rotating pin (230) and the housing (100) are fixedly connected, and the recesses of the two swing rods (200) are arranged opposite to each other.

4. The paper conveying structure according to claim 1, characterized in that, The housing (100) is fixedly provided with an elastic pressure plate (140), which is horizontally arranged on the upper part of the swing rod (200). The elastic pressure plate (140) has an abutting protrusion (141) on the side facing the swing rod (200). When the protrusion (210) is inserted into the through hole (120), the abutting protrusion (141) and the upper surface of the swing rod (200) abut against each other; when the protrusion (210) is removed from the through hole (120), the abutting protrusion (141) and the inner side of the swing rod (200) abut against each other.

5. The paper conveying structure according to claim 1, characterized in that, The housing (100) is provided with two hooks (130) arranged in parallel. The drive slider (300) is provided with two straight grooves (330). The straight grooves (330) and the hooks (130) engage with each other, and the hooks (130) and the straight grooves (330) are slidably connected.

6. The paper conveying structure according to claim 1, characterized in that, The housing (100) is provided with an installation plate (150) inside, the paper tray (110) is provided on the upper surface of the installation plate (150), and the swing rod (200) and the drive slider (300) are provided on the lower surface of the installation plate (150).

7. The paper conveying structure according to claim 6, characterized in that, The mounting plate (150) is provided with a limiting member (350), and the driving slider (300) is provided with a limiting groove (340). The limiting member (350) can only slide back and forth along a fixed path in the limiting groove (340) to constrain the movement path of the driving slider (300).

8. The paper conveying structure according to claim 7, characterized in that, The drive slider (300) is fixedly connected to two straight rods (360), which are spaced apart to form the limiting groove (340). The ends of the straight rods (360) are provided with limiting protrusions (361), and the distance between the two limiting protrusions (361) is less than the width of the limiting member (350).

9. The paper conveying structure according to claim 6, characterized in that, A lever (370) is fixedly connected to one end of the drive slider (300). A sliding groove (160) is provided on the upper surface of the mounting plate (150). The lever (370) is built into the sliding groove (160) and can slide back and forth in the sliding groove (160).

10. A thermal printer, characterized in that, The invention includes a main body (30), a cover (20), and a paper conveying structure (10) as described in any one of claims 1 to 9, wherein the cover (20) and the main body (30) are rotatably connected, the cover (20) can cover the main body (30) and close the main body (30), and the paper conveying structure (10) is installed in the main body (30).

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