A label printer

Abstract

The application provides a label printer, comprising: a casing, a containing cavity is formed in the casing, and a printing assembly is arranged in the casing; a paper reel shaft, the paper reel shaft is detachably installed in the containing cavity of the casing, and a label paper roll is sleeved outside the paper reel shaft; a first baffle, the first baffle is sleeved on the paper reel shaft and located at one side of the label paper roll; a second baffle, the second baffle is sleeved on the paper reel shaft and located at the other side of the label paper roll, and the label paper roll is located between the first baffle and the second baffle; a guide block is arranged on the first baffle and / or the second baffle, the guide block is oppositely arranged with a first cavity wall of the containing cavity, a guide gap is formed between the guide block and the first cavity wall, a label paper unwinding part passes through the guide gap and is matched with the printing assembly, and the label paper unwinding part is located in the guide gap and moves along the guide gap during printing.

Description

Technical Field

[0001] This invention relates to the field of printers, and more particularly to a label printer. Background Technology

[0002] A label printer is a device specifically designed to print text, barcodes, QR codes, and images on various label materials. Label printers are used in many scenarios, such as food delivery, express delivery, supermarkets, and merchants, to print orders and receipts. They are one of the machines that modern retailers rely heavily on. Label printers are also widely used in home life to label the categories of household items for organization and storage.

[0003] The label printer includes a housing and a paper roll. Inside the housing is a paper tray. The label roll is fitted onto the outer wall of the paper roll. Then, left and right baffles are fitted onto both ends of the paper roll, clamping the label roll between them and limiting its position. After that, the assembled paper roll and label roll are installed into the paper tray. The unfolded part of the label roll extends out of the housing opening. When the label printer is started, the label roll passes the printing component located on the top of the housing. The printing component prints on the unfolded part of the label roll, and the printed label roll is pulled out of the housing.

[0004] In existing technology, in order to allow the label roll to fit closer to the thermal sheet of the printing component and make the printed content of the unfolded label roll clearer, an adjustment block is provided on the inner wall of the machine housing. There are two adjustment blocks, which are slidably connected to both ends of the inner wall of the machine housing. A guide groove is opened on the side of the adjustment block near the inner wall of the machine housing. One end of the label roll passes through the guide groove, and then the distance between the two adjustment blocks is adjusted to adapt to the width of the label roll. Then, the end of the label roll that has passed through the guide groove exits from the opening of the machine housing. The adjustment blocks play the role of guiding the movement of the label roll, so that the label roll can fit closer to the thermal sheet.

[0005] The small space inside the paper tray and the even smaller space in the guide slot make it difficult for users to insert one end of the label roll into the guide slot to adjust the adjustment block, resulting in inconvenient installation of the label roll. Summary of the Invention

[0006] In view of this, the purpose of the present invention is to provide a label printer that solves the problem of existing label roll paper.

[0007] To solve the above-mentioned technical problems, the technical solution used in this invention is as follows:

[0008] The label printer of the present invention includes:

[0009] The housing has an accommodating cavity inside, and a printing component is also disposed inside the housing;

[0010] Paper roll: The paper roll is detachably installed in the receiving cavity of the machine housing, and the label roll is sleeved on the outside of the paper roll;

[0011] First baffle: The first baffle is sleeved on the paper roll and located on one side of the label roll;

[0012] Second baffle: The second baffle is sleeved on the paper roll and located on the other side of the label roll, with the label roll located between the first baffle and the second baffle;

[0013] A cover is provided over the accommodating cavity, enclosing the paper roll, the first baffle, and the second baffle within the cavity.

[0014] A guide block is provided on the first baffle and / or the second baffle. The guide block is disposed opposite to the first cavity wall of the accommodating cavity and a guide gap is formed between the guide block and the first cavity wall. The label roll unfolded portion passes through the guide gap and cooperates with the printing component. The label roll unfolded portion is located in the guide gap and moves along the guide gap during the printing time.

[0015] Preferably, the guide block is provided on both the first baffle and the second baffle. The guide block protrudes from the first baffle and the second baffle toward the first cavity wall. When the label printer is in the printing state, the unfolded part of the label roll is limited in the left-right direction between the lower edges of the first baffle and the second baffle.

[0016] Preferably, the width of the guide gap is 0.5mm-3mm, the height of the guide block is basically the same as the height of the paper roll, and the guide block is located inside the first baffle and the second baffle.

[0017] Preferably, the lower end of the first cavity wall is inclined backward, and the lower end of the surface of the guide block opposite to the first cavity wall is also inclined backward.

[0018] Preferably, a baffle is provided on the top of the inner side of the first baffle and / or the second baffle, and the guide block is located at the end of the baffle near the paper feeding end of the label roll.

[0019] Preferably, the first baffle is fixedly disposed at one end of the paper roll, the second baffle is slidably connected to the paper roll, the guide block is located inside the first baffle and the second baffle, and the edge of the second baffle corresponding to the guide block protrudes toward the first cavity wall relative to the surface of the guide block opposite to the first cavity wall.

[0020] Preferably, the rear end of the cover away from the first cavity wall is hinged to the housing, and a driving component is provided at the front end of the cover. The driving component cooperates with the printing component to drive the unfolded portion of the label roll to extend outward. The front end of the cover is detachably connected to the housing. Locking blocks protruding inward along the axial direction of the paper roll are provided on both sides of the first cavity wall. Locking grooves are provided in the locking blocks, and locking buckles are provided in the locking grooves. When the front end of the cover is connected to the housing, the locking buckles engage with the driving component to fix the cover. In the axial direction of the paper roll, the guide block on the first baffle is located inside the corresponding locking block. During printing, the side of the unfolded portion of the label roll near the first baffle is restricted to move to the left by the locking block corresponding to the guide block on the first baffle.

[0021] Preferably, the first baffle is fixedly disposed at one end of the paper roll, the second baffle is slidably connected to the paper roll, the rear end of the cover away from the first cavity wall is hinged to the housing, the front end of the cover is provided with a driving component, the driving component cooperates with the printing component, and is used to drive the unfolded part of the label roll to extend outward; the front end of the cover is detachably connected to the housing, and a stop member is provided on the inner surface of the cover facing the accommodating cavity. When the second baffle moves on the paper roll towards the first baffle to a preset position and the front end of the cover is connected to the housing, the stop member stops the second baffle.

[0022] Preferably, the paper roll is provided with a plurality of positioning points at intervals for positioning the second baffle, and a plurality of stop blocks are also provided at intervals on the inner surface of the machine cover. The top of the second baffle is provided with a protrusion that can be inserted between two adjacent stop blocks.

[0023] Preferably, a connecting plate is sleeved on the outer wall of one end of the paper roll, one side of the connecting plate abuts against the inner wall of the first baffle, a mounting base is provided on the outer side of the connecting plate, an insertion groove is provided on the outer wall of the mounting base, a locking groove is provided on the inner end of the outer wall of the mounting base, the insertion groove and the locking groove are in communication, a climbing block is fixed on the inner end of the outer wall of the mounting base, the climbing block is located in the locking groove, a locking block is fixed on the inner wall of the first baffle, and the climbing block and the locking block can be fitted and inserted together.

[0024] Preferably, the second baffle has a shaft hole, the paper roll is inserted into the shaft hole, a first positioning block and a second positioning block are respectively installed on the first side and the second side of the shaft hole, the first positioning block and the second positioning block are correspondingly arranged, the first surface and the second surface of the outer wall of the paper roll are respectively provided with a first positioning groove and a second positioning groove, the first positioning block is adapted to be inserted into the first positioning groove, and the second positioning block is adapted to be inserted into the second positioning groove.

[0025] Preferably, the height of the first positioning block is greater than the height of the second positioning block.

[0026] Preferably, the second baffle has a shaft hole, the paper roll is inserted into the shaft hole, a first stabilizing plate is installed on the third side of the shaft hole, a first buckle is provided on the side of the first stabilizing plate facing the paper roll, the first buckle moves along the third surface of the outer wall of the paper roll along the axial direction, a first slot is provided on the third surface of the outer wall of the paper roll along the axial direction, there are multiple first slots, the multiple first slots are distributed along the axial direction of the paper roll, and the first buckle is used to cooperate with the first slot to position the second baffle.

[0027] Preferably, a second stabilizing plate is installed on the fourth side of the shaft hole, and a second buckle is provided on the side of the second stabilizing plate facing the paper roll shaft. The second buckle moves along the fourth surface of the paper roll shaft, and a second slot is opened on the fourth surface of the outer wall of the paper roll shaft. There are multiple second slots, and the multiple second slots are distributed along the axial direction of the paper roll shaft.

[0028] Preferably, the side of the first stabilizing plate facing the paper roll is a plane, the third side of the outer wall of the paper roll is a plane, the side of the second stabilizing plate facing the paper roll is an arc-shaped surface, and the fourth side of the outer wall of the paper roll is an arc-shaped surface.

[0029] Preferably, the outer wall of the second baffle is provided with a locking member, which is used to lock the first stabilizing plate and / or the second stabilizing plate.

[0030] Preferably, the locking element includes a movable plate and a pressure block. The movable plate is slidably connected to the outer wall of the second baffle, and the pressure block is disposed on the movable plate. The movable plate slides along the second baffle to control whether the pressure block abuts against the first stabilizing plate or the second stabilizing plate.

[0031] Preferably, the movable plate has snap-fit ​​buckles at both ends of its inner side, with the opposite ends of the two snap-fit ​​buckles protruding outwards from the movable plate. The second baffle has through-holes at both ends of its sidewall for the snap-fit ​​buckles to be inserted into. The widest distance between the protruding portions of the two snap-fit ​​buckles is greater than the maximum distance between the two snap-fit ​​slots. The snap-fit ​​buckles are elastic. After the two snap-fit ​​buckles are inserted into their respective snap-fit ​​slots, the protruding portions of the snap-fit ​​buckles contact the inner wall of the second baffle. The movement of the snap-fit ​​buckles along the snap-fit ​​slots controls whether the pressure block abuts against the first or second stabilizing plate.

[0032] Preferably, an elastic hook is installed at one end of the movable plate, a limiting post is fixed on the outer wall of the second baffle, the elastic hook and the limiting post engage when the pressure block abuts against the first stabilizing plate and / or the second stabilizing plate, and a push plate is fixed on the outer side of the movable plate.

[0033] The beneficial effects of the present invention are as follows: Under the action of the guide block, the guide block can guide the label roll unfolding part to move, so that when the label roll unfolding part moves along the first cavity wall, the label roll unfolding part can fit more closely to the first cavity wall, and thus when the label roll moves to the output end of the printing component, the label roll unfolding part fits more closely to the output end of the printing component, thereby making the printing component print the label roll unfolding part more clearly.

[0034] Compared to existing technologies, by setting two adjusting blocks on the first cavity wall and inserting the unfolded portion of the label roll into the gap between the adjusting blocks and the first cavity wall, it becomes more difficult for the user to insert the unfolded portion of the label roll into the gap due to the smaller space of the accommodating cavity and the even smaller gap between the adjusting blocks and the first cavity wall. Furthermore, the distance between the two adjusting blocks needs to be adapted to the width of the label roll. When adjusting the distance between the two adjusting blocks, there will be some resistance to the sliding between the adjusting blocks and the first cavity wall. Moreover, it is difficult for the user to move the adjusting blocks to the corresponding position in one go. Multiple fine adjustments are required to make the distance between the two adjusting blocks more adaptable to the width of the label roll.

[0035] In this application, after the label roll is assembled onto the outer wall of the paper roll, the inner wall of the unfolded part of the label roll is covered onto the outer wall of the guide block. After the paper roll is installed into the receiving cavity, the unfolded part of the label roll is already located within the guide gap. Then, the unfolded part of the label roll moves along the guide gap to the outside of the machine housing. After the machine cover is closed on the top surface of the machine housing, the installation of the label roll is completed and it can be used, making it more convenient for users to install the label roll. Attached Figure Description

[0036] The above and other objects, features, and advantages of the invention will become clearer through a more detailed description of the preferred embodiments illustrated in the accompanying drawings. The same reference numerals denote the same parts throughout the drawings, and the drawings are not intentionally drawn to scale with actual dimensions; the focus is on illustrating the gist of the invention.

[0037] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of this application.

[0038] Figure 2 This is a diagram showing the assembly steps of the label roll and the paper roll.

[0039] Figure 3 This is a cross-sectional view of this application.

[0040] Figure 4 This is a half-sectional view of Embodiment 1 of this application.

[0041] Figure 5 This is the elevation view of the first baffle.

[0042] Figure 6 This is a schematic diagram of the structure at the top of the paper roll.

[0043] Figure 7 This is an elevation view of the second baffle.

[0044] Figure 8 This is a schematic diagram of the second baffle.

[0045] Figure 9 This is a schematic diagram of the structure at the bottom of the paper roll.

[0046] Figure 10 for Figure 4 An enlarged view of A in the diagram.

[0047] Figure 11 This is a schematic diagram of the lock mechanism.

[0048] Figure 12 This is a structural schematic diagram of the lock from another perspective.

[0049] Figure 13 This is an assembly diagram of the second baffle and the paper roll in Example 2.

[0050] In the diagram: 1. Machine casing; 11. First cavity wall; 12. Second cavity wall; 13. Third cavity wall; 14. Fourth cavity wall; 15. Mounting slot; 16. Locking block; 161. Locking slot; 17. Locking buckle; 2. Machine cover; 3. Paper roll; 31. Connecting plate; 32. Mounting base; 321. Insertion slot; 322. Locking slot; 33. First positioning slot; 34. Second positioning slot; 35. First slot; 36. Second slot; 4. First baffle; 41. Guide block; 42. Baffle plate; 5. Second baffle; 51. Shaft hole; 52. Mounting plate; 53. First positioning block; 54. Second positioning block; 55. ... 56. Stabilizing plate; 57. Second stabilizing plate; 58. First buckle; 59. Second buckle; 6. Snap-fit ​​groove; 70. Label roll paper; 71. Locking assembly; 72. Locking block; 73. Climbing block; 84. Drive assembly; 85. Driven gear; 86. Rotating roller; 97. Stop component; 98. Stop block; 99. Protrusion; 90. Limiting groove; 90. Movable plate; 91. Sliding groove; 92. Snap-fit ​​buckle; 93. First positioning post; 94. Second positioning post; 95. First movable groove; 95. Second movable groove; 96. Pressure block; 97. Elastic hook; 98. Limiting post; 99. Push plate. Detailed Implementation

[0051] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings.

[0052] It should be noted that when a component is considered to be "connected" to another component, it can be directly connected to and integrated with the other component, or there may be an intervening component present. The terms "mounted," "one end," "the other end," and similar expressions used in this document are for illustrative purposes only.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art. The terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0054] Example 1:

[0055] refer to Figures 1-4This invention provides a label printer, including a housing 1 and a cover 2. One end of the cover 2 is hinged to the top end of the housing 1. In this embodiment, the end of the cover 2 that is hinged to the housing 1 is the rear end, and the end opposite to the rear end is the front end. When the front end of the housing 1 is placed facing each other, the left side of the housing 1 is the left end, and the right side of the housing 1 is the right end. A receiving cavity is provided inside the housing 1, and the cover 2 is placed on the receiving cavity. The front end side of the receiving cavity of the housing 1 is the first cavity wall 11, the rear end side of the receiving cavity of the housing 1 is the second cavity wall 12, the left end side of the receiving cavity of the housing 1 is the third cavity wall 13, and the right end side of the receiving cavity of the housing 1 is the fourth cavity wall 14.

[0056] The third cavity wall 13 and the fourth cavity wall 14 are respectively provided with mounting grooves 15. A paper roll 3 is provided inside the housing 1. Both ends of the paper roll 3 are inserted into the mounting grooves 15 that are close to it, so that the paper roll 3 is detachably connected to the inside of the housing 1, thereby facilitating the assembly and disassembly of the paper roll 3 and the housing 1. When it is necessary to put the label roll 6 on the outer wall of the paper roll 3, the paper roll 3 is first taken out from the accommodating cavity.

[0057] A first baffle 4 is fitted onto the outer wall of the left end of the paper roll 3. The printer also includes a second baffle 5. The label roll 6 is fitted onto the outer wall of the paper feed roll 3 from the right end of the paper roll 3. The label roll 6 is moved to one side of the first baffle 4. Then, the second baffle 5 is fitted onto the outer wall of the paper feed roll 3 from the right end of the paper roll 3. The second baffle 5 is moved to the other side of the label roll 6. The label roll 6 is located between the first baffle 4 and the second baffle 5. The first baffle 4 and the second baffle 5 can limit the label roll 6. When the label roll 6 is in use, it reduces the left and right movement of the label roll 6 on the paper roll 3. At the same time, it can also accommodate label rolls 6 of different widths.

[0058] Reference Figure 5 and Figure 6 A connecting plate 31 is fixedly sleeved on the outer wall of the left end of the paper roll 3. A mounting base 32 is fixed on the outer side of the connecting plate 31. A insertion groove 321 is opened on the outer wall of the mounting base 32. A locking groove 322 is opened on the inner end of the outer wall of the mounting base 32. The insertion groove 321 and the locking groove 322 are in communication. The printer also includes a locking component 7. The locking component 7 includes a locking block 71 and a climbing block 72. The climbing block 72 is fixed on the inner end of the outer wall of the mounting base 32. The climbing block 72 is located in the locking groove 322. The locking block 71 is fixed on the inner wall of the first baffle 4.

[0059] When the first baffle 4 is installed with the paper roll 3, the left end of the paper roll 3 and the mounting base 32 pass through the first baffle 4, and one side of the connecting plate 31 abuts against the inner wall of the first baffle 4. At the same time, the locking block 71 enters from the insertion groove 321. Then, the paper roll 3 is rotated so that the locking block 71 enters the locking groove 322. The side of the locking block 71 near the climbing block 72 is provided with a recess. The paper roll 3 is rotated until the climbing block 72 enters the recess, thereby locking the first baffle 4 and the paper roll 3. At this time, it is difficult for the user to separate the first baffle 4 and the paper roll 3 by applying axial force to the paper roll 3. It is not easy for the user to disassemble, so the first baffle 4 is the locking end of one end of the paper roll 3. When replacing the label roll 6, only the second baffle 5 needs to be removed and installed, which is convenient for the user and can also reduce the loss of parts.

[0060] In other embodiments, the first baffle 4 and the paper roll 3 can be fixed together by fasteners such as screws and bolts. However, the disassembly and assembly of this method is more complicated. The disassembly method in this embodiment is more convenient. In another embodiment, the first baffle 4 and one end of the paper roll 3 can also be integrally formed and fixedly connected. However, the production process of integrally forming the first baffle 4 and the paper roll 3 involves complex molds and high mold costs, which increases the cost of producing the paper roll 3 and the first baffle 4.

[0061] Reference Figures 2-4 After the label roll 6 and the paper roll 3 are assembled, insert both ends of the paper roll 3 into the mounting slots 15 that are close to it, install the label roll 6 into the receiving cavity, and then extend one end of the unfolded part of the label roll 6 out of the housing 1 along the first cavity wall 11. After that, close the cover 2 on the top surface of the housing 1. A moving gap is reserved between the housing 1 and the cover 2 to accommodate the movement of the unfolded part of the label roll 6, so that the unfolded part of the label roll 6 can move out of the housing 1 through the moving gap.

[0062] A printing component is provided at the top inside the housing 1. The output end of the printing component is aligned with the unfolded part of the label roll 6. When the unfolded part of the label roll 6 passes the output end of the printing component, the printing component can print on the unfolded part of the label roll 6. The printing component is existing technology and will not be described in detail in this embodiment. Therefore, after the printer is started and the unfolded part of the label roll 6 extends out of the housing 1, the printing is completed on the part of the label roll 6 that extends out of the housing 1.

[0063] Reference Figure 1The front end of the cover 2 is provided with a drive assembly 8, which includes a motor, a transmission gear, a driven gear 81, and a rotating roller 82. The motor is installed at the top inside the housing 1, the transmission gear is assembled at the output end of the motor, and the rotating roller 82 is rotatably connected to the front end of the inner wall of the cover 2. The driven gear 81 is fixed to the end of the rotating roller 82 near the transmission gear. When the cover 2 is closed on the top surface of the housing 1, the driven gear 81 meshes with the transmission gear, and the outer wall of the rotating roller 82 presses the unfolded part of the label roll 6 against the first cavity wall 11. The motor is started, and the motor drives the transmission gear to rotate, which drives the driven gear 81 to rotate, thereby driving the rotating roller 82 to rotate. The rotation of the rotating roller 82 can pull the unfolded part of the label roll 6 to move out of the housing 1.

[0064] Reference Figure 3 and Figure 4 The first baffle 4 and the second baffle 5 are respectively provided with guide blocks 41 on their inner sides. The guide blocks 41 protrude from the first baffle 4 and the second baffle 5 toward the first cavity wall 11. The guide blocks 41 are arranged opposite to the first cavity wall 11 and a guide gap is formed between the guide blocks 41 and the first cavity wall 11. The unfolded part of the label roll 6 passes through the guide gap and cooperates with the printing component. The unfolded part of the label roll 6 is located in the guide gap during the printing time and moves along the guide gap.

[0065] Under the action of the guide block 41, the guide block 41 can guide the unfolded part of the label roll 6 to move, so that when the unfolded part of the label roll 6 moves along the first cavity wall 11, the unfolded part of the label roll 6 can fit more closely to the first cavity wall 11, and thus when the label roll 6 moves to the output end of the printing component, the unfolded part of the label roll 6 fits more closely to the output end of the printing component, thereby making the printing component print the unfolded part of the label roll 6 more clearly.

[0066] Compared to existing technologies, by setting two adjusting blocks on the first cavity wall 11, the unfolded portion of the label roll 6 is inserted into the gap between the adjusting block and the first cavity wall 11. Due to the small space of the accommodating cavity and the even smaller gap between the adjusting block and the first cavity wall 11, it is more difficult for the user to insert the unfolded portion of the label roll 6 into the gap between the adjusting block and the first cavity wall 11. Furthermore, the distance between the two adjusting blocks needs to be adapted to the width of the label roll 6. When adjusting the distance between the two adjusting blocks, there will be some resistance to the sliding between the adjusting block and the first cavity wall 11. Moreover, it is difficult for the user to move the adjusting block to the corresponding position in one go. Multiple fine adjustments are required to make the distance between the two adjusting blocks more adaptable to the width of the label roll 6.

[0067] In this application, after the label roll 6 is assembled onto the outer wall of the paper roll 3, the inner wall of the unfolded part of the label roll 6 is covered onto the outer wall of the guide block 41. After the paper roll 3 is installed into the receiving cavity, the unfolded part of the label roll 6 is already located within the guide gap. Then, the unfolded part of the label roll 6 moves along the guide gap to the outside of the housing 1. After the cover 2 is closed on the top surface of the housing 1, the installation of the label roll 6 is completed and it can be used, making it more convenient for users to install the label roll 6.

[0068] Reference Figure 3 and Figure 4 The height of the guide block 41 is basically the same as the height of the paper roll 3. The first cavity wall 11 is an inclined surface, and the inclined direction of the first cavity wall 11 is from top to bottom towards the rear end, so that the distance between the top of the first cavity wall 11 and the paper roll 3 is greater than the distance between the bottom of the first cavity wall 11 and the paper roll 3. Correspondingly, the surface of the guide block 41 opposite to the first cavity wall 11 is also an inclined surface. The inclination angle and direction of the inclined surface of the guide block 41 are consistent with those of the first cavity wall 11, so that the guide gap is an upward inclined channel relative to the position of the label roll 6.

[0069] When the drive component 8 pulls the unfolded part of the label roll 6 to move, compared to applying a vertically upward force to the unfolded part of the label roll 6, the vertically upward force is used to overcome the gravity of the label roll 6 and make it tend to move upward. However, the movement of the unfolded part of the label roll 6 requires a force in the tangential direction of the label roll 6. The component of the vertically upward force on the unfolded part of the label roll 6 in this direction is very small, which makes it more difficult to apply a vertically upward force to pull the unfolded part of the label roll 6.

[0070] This application guides the unfolded portion of the label roll 6 to move obliquely upward through an upwardly tilted guide gap. Therefore, the traction force applied by the drive assembly 8 to the label roll 6 is obliquely upward, which can be decomposed into a vertically upward component and a horizontal component. The horizontal force provides the tangential force required to rotate the roll. This application concentrates the force more efficiently to drive the label roll 6 to rotate and utilizes a longer lever arm, thereby reducing the greater energy waste when pulling vertically upward. Therefore, it is more labor-saving and reduces the energy waste of the drive assembly 8.

[0071] The width of the guide gap is 0.5mm-3mm. When the width of the guide gap is less than 0.5mm, when the unfolded part of the label roll 6 moves along the guide gap, the unfolded part of the label roll 6 will generate more friction with the first cavity wall 11 and the outer wall of the guide block 41, thus affecting the smooth passage of the unfolded part of the label roll 6 within the guide gap. When the width of the guide gap exceeds 3mm, when the unfolded part of the label roll 6 passes the output end of the printing component, the distance between the label roll 6 and the output end of the printing component is relatively large, thus affecting the printing effect of the printing component on the unfolded part of the label roll 6.

[0072] When the label printer is printing and the unfolded part of the label roll 6 is in a taut state, the bottom of the first baffle 4 and the second baffle 5 protrudes from the bottom surface of the unfolded part of the label roll 6, so that the unfolded part of the label roll 6 is limited to the lower edge of the first baffle 4 and the second baffle 5 in the left and right direction, thereby reducing the left and right movement of the unfolded part of the label roll 6 during the movement.

[0073] Correspondingly, the portion of the second baffle 5 corresponding to the guide block 41 protrudes from the outer wall of the guide block 41. The direction in which the second baffle 5 protrudes from the guide block 41 is the direction of the first cavity wall 11. That is, the edge of the second baffle 5 at the location corresponding to the guide block 41 protrudes from the surface of the guide block 41 opposite to the first cavity wall 11, so that when the unfolded portion of the label roll 6 moves along the outer wall of the guide block 41, the portion of the second baffle 5 protruding from the outer wall of the guide block 41 can limit the right side of the unfolded portion of the label roll 6, further guiding the movement of the unfolded portion of the label roll 6 and reducing the possibility of the label roll 6 moving to the right when moving along the outer wall of the guide block 41.

[0074] Reference Figure 3 and Figure 4 Locking blocks 16 are respectively provided on both sides of the first cavity wall 11. The two locking blocks 16 are distributed along the axial direction of the paper roll 3. The locking blocks 16 protrude into the accommodating cavity. Locking grooves 161 are respectively provided in the two locking blocks 16. Locking buckles 17 are respectively provided in the two locking blocks 16. The two locking buckles 17 are respectively located in the corresponding locking grooves 161. When the cover 2 and the housing 1 are closed, the two ends of the rotating roller 82 are respectively inserted into the locking buckles 17 that are close to it. The locking buckles 17 limit the up and down movement of the rotating roller 82, but do not affect the rotation of the rotating roller 82, thereby locking the front end of the cover 2 to the housing 1. A button is provided on the outer wall of the housing 1 to control the unlocking of the locking buckles 17. Pressing the button applies an upward force to the front end of the housing 1, which can separate the front end of the cover 2 from the housing 1.

[0075] Along the axial direction of the paper roll 3, the guide block 41 on the first baffle 4 is located inside the corresponding locking block 16. During printing, the side of the unfolded label roll 6 closest to the first baffle 4 is restricted to moving to the left by the locking block 16 corresponding to the guide block 41 on the first baffle 4. Therefore, when the unfolded label roll 6 moves along the outer wall of the two guide blocks 41, the left side of the label roll 6 is limited by the inner wall of the locking block 16, and the right side of the label roll 6 is limited by the part of the second baffle 5 protruding from the outer wall of the guide block 41, thereby further reducing the left and right movement of the unfolded label roll 6 during the movement.

[0076] The corner of the bottom of the guide block 41 near the first cavity wall 11 is a rounded corner. When the unfolded part of the label roll 6 passes through the bottom of the guide block 41 and moves along the outer wall of the guide block 41, the rounded corner makes the unfolded part of the label roll 6 move more smoothly when it passes the corner of the bottom of the guide block 41 near the first cavity wall 11. At the same time, it can also reduce the damage to the unfolded part of the label roll 6.

[0077] Reference Figure 1 and Figure 4 The first baffle 4 and the second baffle 5 are respectively provided with baffle plates 42 on the top of their inner sides. The baffle plates 42 on the first baffle 4 are arranged along its top edge. Correspondingly, the baffle plates 42 on the second baffle 5 are arranged along its top edge. The guide block 41 is located at the end of the baffle plate 42 near the paper feeding end of the label roll 6. Under the action of the baffle plate 42, it can help the user to correctly install the label roll 6.

[0078] Compared to the case without the baffle 42, when installing the label roll 6, the user may completely insert the label roll 6 into the guide block 41, then extend the unfolded portion of the label roll 6 from the top of the guide block 41 and out of the housing 1. This installation method results in greater resistance to the unfolded portion of the label roll 6 during movement, making it difficult for it to move smoothly and increasing the likelihood of paper jams. However, with the baffle 42, the baffle 42 can prevent the unfolded portion of the label roll 6 from extending from the top of the guide block 41, thus guiding the user to extend the unfolded portion of the label roll 6 from the bottom of the guide block 41 and then cover the outer wall of the guide block 41, guiding the user to perform the correct installation.

[0079] Reference Figures 6-9 A shaft hole 51 is provided through the middle of the side wall of the second baffle 5. The right end of the paper roll 3 is inserted into the shaft hole 51, thereby fitting the second baffle 5 onto the outer wall of the paper roll 3. In this embodiment, when the second baffle 5 is fitted onto the outer wall of the paper roll 3 and the baffle 42 is placed at the top, the front end of the shaft hole 51 is the first side, the side of the shaft hole 51 opposite to the first side is the second side, the top of the shaft hole 51 is the third side, and the bottom of the shaft hole 51 is the fourth side. Depending on different scenarios, the positions of the first, second, third, and fourth sides of the shaft hole 51 can be changed accordingly. Correspondingly, after the second baffle 5 is fitted onto the outer wall of the paper roll 3, the side of the paper roll 3 corresponding to the first side of the shaft hole 51 is the first side, the side of the paper roll 3 corresponding to the second side of the shaft hole 51 is the second side, the side of the paper roll 3 corresponding to the third side of the shaft hole 51 is the third side, and the side of the paper roll 3 corresponding to the fourth side of the shaft hole 51 is the fourth side.

[0080] Mounting plates 52 are fixed to the first and second sides of the shaft hole 51 of the second baffle 5. The mounting plates 52 are located inside the shaft hole 51. The shapes of the inner walls of the two mounting plates 52 are adapted to the outer walls of their corresponding paper rolls 3, so that the two mounting plates 52 can move along both ends of the outer walls of the paper rolls 3. The mounting plates 52 extend outward from the second baffle 5.

[0081] A first positioning groove 33 is provided on the first side of the outer wall of the paper roll 3 along the axis, and a second positioning groove 34 is provided on the second side of the outer wall of the paper roll 3 along the axis. Correspondingly, a first positioning block 53 is fixed on the inner wall of the mounting plate 52 located on the first side of the shaft hole 51. The long side of the first positioning block 53 is parallel to the axis of the paper roll 3. The first positioning block 53 is inserted into the first positioning groove 33. A second positioning block 54 is fixed on the inner wall of the mounting plate 52 located on the second side of the shaft hole 51. The long side of the second positioning block 54 is parallel to the axis of the paper roll 3. The second positioning block 54 is inserted into the second positioning groove 34. The first positioning block 53 moves along the first positioning groove 33, and the second positioning block 54 moves along the second positioning groove 34, thereby guiding the second baffle 5 to move along the axis of the paper roll 3.

[0082] The first positioning block 53 and the second positioning block 54 extend to the outside of the inner side of the second baffle 5, which can reduce the obstruction of the view of the first positioning block 53 and the second positioning block 54 by the second baffle 5. The user can better align the first positioning block 53 and the second positioning block 54 with the first positioning groove 33 and the second positioning groove 34 respectively. Therefore, when the second baffle 5 is fitted onto the outer wall of the paper roll 3, the first positioning block 53 and the second positioning block 54 can be inserted into the first positioning groove 33 and the second positioning groove 34 respectively, which makes the installation of the second baffle 5 more convenient.

[0083] A first stabilizing plate 55 is fixed on the third side of the shaft hole 51 of the second baffle 5. The first stabilizing plate 55 extends outward from the second baffle 5. A second stabilizing plate 56 is fixed on the fourth side of the shaft hole 51 of the second baffle 5. The second stabilizing plate 56 extends outward from the second baffle 5. The first stabilizing plate 55 and the second stabilizing plate 56 are arranged opposite to each other. After the paper roll 3 is inserted into the shaft hole 51, the first stabilizing plate 55 moves along the third surface of the outer wall of the paper roll 3, and the second stabilizing plate 56 moves along the fourth surface of the outer wall of the paper roll 3.

[0084] The first stabilizing plate 55 and the second stabilizing plate 56 are elastic. A first buckle 57 is fixed to the outer end of the first stabilizing plate 55 facing the paper roll 3. A plurality of first slots 35 are spaced apart on the third surface of the outer wall of the paper roll 3. The plurality of first slots 35 are evenly distributed along the axial direction of the paper roll 3. The first buckle 57 can be adapted to be inserted into the corresponding first slot 35. Correspondingly, a second buckle 58 is fixed to the outer end of the second stabilizing plate 56 facing the paper roll 3. The first buckle 57 and the second buckle 58 are in the same vertical direction. A plurality of second slots 36 are spaced apart on the fourth surface of the outer wall of the paper roll 3. The plurality of second slots 36 are evenly distributed along the axial direction of the paper roll 3. The positions of the second slots 36 and the first slots 35 correspond to each other, so that the first buckle 57 is located in the first slot 35 while the second buckle 58 is located in the corresponding second slot 36, thereby positioning the second baffle 5 and forming a plurality of positioning points on the paper roll 3.

[0085] When the second baffle 5 needs to be fitted onto the outer wall of the paper roll 3, one end of the paper roll 3 is inserted into the shaft hole 51, the first positioning block 53 is inserted into the first positioning groove 33, and the second positioning block 54 is inserted into the second positioning groove 34. Then, by continuously pushing the second baffle 5, the first latch 57 moves along the axis of the paper roll 3 towards the third surface of the outer wall, and the second latch 58 moves along the axis of the paper roll 3 towards the fourth surface of the outer wall. When the first latch 57 is inserted into the first latch 35 and the second latch 58 is inserted into the second latch 36, the user needs to apply greater force to push the first latch 57 out of the first latch 35 and the second latch 58 out of the second latch 36. The first latch 57, pushed out of the first latch 35, moves along the paper roll 3 towards the fourth surface of the outer wall. When the roll 3 moves along the third surface of the outer wall, the first buckle 57 is in an interference fit with the third surface of the outer wall of the roll 3. The outer wall of the roll 3 presses against the first buckle 57, thereby causing the first stabilizing plate 55 to adjust upward until the first buckle 57 enters the next first slot 35 during the movement. During the process of the first stabilizing plate 55 restoring its deformation, it drives the first buckle 57 to insert into the first slot 35. The first buckle 57 moves along the roll 3 in the same way until the second baffle 5 is located on one side of the label roll 6. Correspondingly, the second buckle 58 moves along the roll 3 in the same way as the first buckle 57. This will not be described in detail in the embodiments of this application.

[0086] Therefore, during the axial movement of the second baffle 5 along the paper roll 3, it will encounter corresponding resistance. When the first buckle 57 is inserted into the first slot 35 and the second buckle 58 is inserted into the second slot 36, a jamming effect is produced. Each jamming point corresponds to a corresponding size, and each jamming point is a positioning point. When the second baffle 5 is moved to one side of the label roll 6, the first buckle 57 is inserted into the corresponding first slot 35 and the second buckle 58 is inserted into the corresponding second slot 36, thereby adapting to label rolls 6 of different widths. In addition, this method can limit the second baffle 5. When the second baffle 5 is moved to the corresponding position, the sliding of the second baffle 5 along the paper roll 3 is reduced, which can better limit the label roll 6.

[0087] The height of the first positioning block 53 is greater than the height of the second positioning block 54. Therefore, when the user reverses the positions of the second positioning block 54 and the first positioning block 53, that is, when the first positioning block 53 is aligned with the second positioning groove 34 and the second positioning block 54 is aligned with the first positioning groove 33, since the height of the first positioning block 53 is greater than the height of the second positioning groove 34, the first positioning block 53 and the second positioning groove 34 do not fit together, and the second positioning block 54 and the first positioning groove 33 do not fit together. Therefore, it is more difficult for the first positioning block 53 to be inserted into the second positioning groove 34, thereby guiding the user to complete the installation correctly.

[0088] Correspondingly, the side of the first stabilizing plate 55 facing the paper roll 3 is flat, and the third side of the paper roll 3 on its axial outer wall is flat. The side of the second stabilizing plate 56 facing the paper roll 3 is curved, and the fourth side of the paper roll 3 on its axial outer wall is curved. Therefore, when the user aligns the second baffle 5 upside down with the paper roll 3, the first stabilizing plate 55 is aligned with the fourth side of the outer wall of the paper roll 3, and the second stabilizing plate 56 is aligned with the third side of the outer wall of the paper roll 3. However, the straight surface of the first stabilizing plate 55 does not match the curved surface of the paper roll 3, and the curved surface of the second stabilizing plate 56 does not match the straight surface of the paper roll 3. It is more difficult to fit the second baffle 5 onto the paper roll 3, which can further guide the user to complete the installation correctly.

[0089] Therefore, through the aforementioned foolproof design, when the user places the second baffle 5 on the outer wall of the paper roll 3, it can only be installed in the one correct installation position. After installation in the correct position, the guide block 41 on the first baffle 4 corresponds to the guide block 41 on the second baffle 5, and the baffle plate 42 on the first baffle 4 corresponds to the baffle plate 42 on the second baffle 5. This reduces the occurrence of incorrect installation methods where the two guide blocks 41 are misaligned and the two baffle plates 42 are misaligned, thereby reducing the situation where user installation errors affect the use.

[0090] Reference Figure 4 and Figure 10The printer is also equipped with a stop component 9. In this embodiment, the stop component 9 includes a stop block 91 and a protrusion 92. The protrusion 92 is fixed to the inner end of the top surface of the baffle 42 on the second baffle 5. The stop block 91 is fixed to the inner surface of the cover 2. There are multiple stop blocks 91, which are evenly spaced along the inner surface of the cover 2. A limiting groove 93 is formed between two adjacent stop blocks 91. When the second baffle 5 is fitted on the rightmost end of the outer wall of the paper roll 3, that is, when the first buckle 57 is inserted into the first slot 35 located at the rightmost end, after the cover 2 is closed on the top surface of the housing 1, the protrusion 92 can be adapted to be inserted into the limiting groove 93 located at the rightmost end. The distance between two adjacent limiting grooves 93 is consistent with the distance between two adjacent first slots 35, so that after the second baffle 5 and the cover 2 are closed on the top surface of the housing 1, there is a limiting groove 93 that cooperates with the protrusion 92.

[0091] Therefore, when the second baffle 5 moves to the corresponding position of the paper roll 3, the first latch 57 and the first slot 35, and the second latch 58 and the second slot 36 cooperate to limit the second baffle 5, reducing the movement of the second baffle 5 along the paper roll 3 during printer operation. However, when the second baffle 5 slides along the paper roll 3 for a long time, the first latch 57 and the second latch 58 will wear, thus affecting the limiting effect of the second baffle 5. Under the action of the stop component 9, the position of the second baffle 5 can be further limited. When the limiting effect of the first latch 57 and the second latch 58 on the second baffle 5 weakens, after the cover 2 is closed on the top surface of the casing 1, the protrusion 92 is inserted into the corresponding limiting groove 93, thereby strengthening the limiting effect of the second baffle 5, reducing the movement of the second baffle 5 along the paper roll 3, and improving the service life of the printer.

[0092] Example 2: The difference between this example and Example 1 is that the structure of the stop component is different.

[0093] Reference Figure 8 and Figure 11 In this embodiment of the application, the stop component 9 includes a locking member, which is disposed on the outer wall of the second baffle 5. The locking member includes a movable plate 94. A sliding groove 941 is provided through the middle of the side wall of the movable plate 94 for the first stabilizing plate 55, the second stabilizing plate 56 and the mounting plate 52 to move through. The sliding groove 941 allows the movable plate 94 to slide along the outer wall of the second baffle 5.

[0094] The movable plate 94 has two snap fasteners 942 fixed on its inner side. The two snap fasteners 942 are distributed at the top and bottom of the movable plate 94. The snap fastener 942 at the top protrudes upward at the end away from the movable plate 94, and the snap fastener 942 at the bottom protrudes downward at the end away from the movable plate 94. Correspondingly, the side wall of the second baffle 5 has a through snap groove 59. The snap fasteners 942 can be movably inserted into the snap groove 59. There are two snap grooves 59, which are distributed at the top and bottom of the second baffle 5. The first stabilizing plate 55 and the second stabilizing plate 56 are located between the two snap grooves 59. The widest distance between the protruding parts of the two snap fasteners 942 is greater than the maximum distance between the two snap grooves 59.

[0095] The latches 942 are elastic. When a relative force is applied to the two latches 942, pressing the two latches 942 shortens the widest distance between the protruding parts of the two latches 942, so that the two latches 942 can pass through the corresponding latching grooves 59 at the same time. Then, the force applied to the latches 942 is released, and the protruding parts of the two latches 942 abut against the inner side of the second baffle 5. The movable plate 94 and the second baffle 5 are engaged by the latches 942. The latches 942 can move along the long side of the latching grooves 59, thereby driving the movable plate 94 to move along the outer side wall of the second baffle 5.

[0096] To ensure greater stability of the movable plate 94 as it moves along the second baffle 5 and reduce wobbling during its movement, a first positioning post 943 is fixed to one end of the movable plate 94 near the latch 942, and a second positioning post 944 is fixed to the other end of the movable plate 94 away from the first positioning post 943. Correspondingly, a first movable groove 951 is formed through the side wall of the second baffle 5 for the first positioning post 943 to pass through, with the long side of the first movable groove 951 parallel to the long side of the latch groove 59. A second movable groove 952 is formed through the side wall of the second baffle 5 for the second positioning post 944 to pass through, with the long side of the second movable groove 952 parallel to the long side of the first movable groove 951. During the movement of the movable plate 94, the first positioning post 943 moves along the long side of the first movable groove 951, and the second positioning post 944 moves along the long side of the second movable groove 952, thereby guiding the movement of the movable plate 94.

[0097] The lengths of the first movable groove 951 and the second movable groove 952 are the same. The range of movement of the first positioning post 943 along the first movable groove 951 and the range of movement of the second positioning post 944 along the second movable groove 952 can limit the range of movement of the movable plate 94 along the second baffle 5, thereby achieving the positioning function.

[0098] Reference Figure 12 and Figure 13A pressure block 96 is fixed on the side of the movable plate 94 away from the snap fastener 942. The pressure block 96 is located at the end of the movable plate 94 near the second positioning post 944. There are two pressure blocks 96, which are respectively set at the top and bottom of the movable plate 94. The two pressure blocks 96 are set correspondingly. The inner side of the pressure block 96 protrudes from the inner wall of the movable plate 94, and the protruding part of the pressure block 96 extends to the other side of the snap fastener 942.

[0099] When the second positioning post 944 is located at the end of the second movable groove 952 away from the second positioning block 54, correspondingly, the first positioning post 943 is located at the end of the first movable groove 951 near the first positioning block 53. The two pressure blocks 96 are offset from the first stabilizing plate 55 and the second stabilizing plate 56. At this time, the first stabilizing plate 55 and the second stabilizing plate 56 are in a state that can undergo elastic deformation. The second baffle 5 can move axially along the paper roll shaft 3 until the second baffle 5 moves to the side of the label roll 6. Then, the movable plate 94 is moved to move the second positioning post 944 to the end of the second movable groove 952 near the first positioning block 54. At one end of the two positioning blocks 54, the first positioning post 943 moves to the end of the first movable groove 951 away from the first positioning block 53. The inner sidewalls of the two pressure blocks 96 abut against the outer wall of the first stabilizing plate 55 and the outer wall of the second stabilizing plate 56, respectively. At this time, the two pressure blocks 96 restrict the elastic deformation of the first stabilizing plate 55 and the second stabilizing plate 56. Therefore, the first latch 57 is difficult to move out of the first slot 35, and the second latch 58 is difficult to move out of the second slot 36, thereby achieving the locking state of the second baffle 5. When the printer is in use, the movement of the second baffle 5 along the paper roll 3 can be reduced.

[0100] An elastic hook 97 is installed at the end of the movable plate 94 away from the second positioning post 944. Correspondingly, a limiting post 98 is fixed on the outer wall of the second baffle 5. When the first stabilizing plate 55 and the second stabilizing plate 56 are misaligned with the pressure block 96, the elastic hook 97 and the limiting post 98 are separated. When it is necessary to lock the second baffle 5, the movable plate 94 is pushed, which moves the first positioning post 943 to the end of the first movable groove 951 away from the first positioning block 53. During this process, the elastic hook 97 is pushed close to the limiting post 98, so that the limiting post 98 enters the interior of the elastic hook 97 from the opening. The limiting post 98 can restrict the movement of the elastic hook 97. When the first stabilizing plate 55 and the second stabilizing plate 56 are abutted by the corresponding pressure block 96, the movable plate 94 can be locked with the cooperation of the elastic hook 97 and the limiting post 98, reducing the movement of the movable plate 94 and thus better locking the second baffle 5.

[0101] The diameter of the second positioning post 944 is larger than the diameter of the first positioning post 943. The width of the first movable groove 951 is adapted to the diameter of the first positioning post 943, and the width of the second movable groove 952 is adapted to the diameter of the second positioning post 944. This guides the user to correctly install the lock on the outer wall of the second baffle 5, so that the elastic hook 97 can be located on one side of the limiting post 98, reducing the possibility of the lock being installed backwards.

[0102] A push plate 99 is fixed on the side of the movable plate 94 away from the snap fastener 942. There are two push plates 99, which are located at both ends of the outer side of the movable plate 94. Under the action of the push plates 99, the movable plate 94 can be moved by pushing the push plates 99, which is convenient for the user to operate. When disassembling the lock, the push plates 99 can also be pulled as an auxiliary force to facilitate the disassembly of the lock.

[0103] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0104] In the description of this specification, the references to terms such as "preferred embodiment," "another embodiment," "other embodiment," or "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0105] Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of this application.

Claims

1. A label printer, comprising: The housing has an accommodating cavity inside, and a printing component is also disposed inside the housing; Paper roll: The paper roll is detachably installed in the receiving cavity of the machine housing, and the label roll is sleeved on the outside of the paper roll; First baffle: The first baffle is sleeved on the paper roll and located on one side of the label roll; Second baffle: The second baffle is sleeved on the paper roll and located on the other side of the label roll, with the label roll located between the first baffle and the second baffle; A cover is provided over the accommodating cavity, enclosing the paper roll, the first baffle, and the second baffle within the cavity. Its features are: A guide block is provided on the first baffle and / or the second baffle. The guide block is disposed opposite to the first cavity wall of the accommodating cavity and a guide gap is formed between the guide block and the first cavity wall. The label roll unfolded portion passes through the guide gap and cooperates with the printing component. The label roll unfolded portion is located in the guide gap and moves along the guide gap during the printing time.

2. The label printer as described in claim 1, characterized in that, The first baffle and the second baffle are both provided with the guide block. The guide block protrudes from the first baffle and the second baffle toward the first cavity wall. When the label printer is in the printing state, the unfolded part of the label roll is limited in the left and right direction between the lower edges of the first baffle and the second baffle.

3. The label printer as described in claim 1, characterized in that, The width of the guide gap is 0.5mm-3mm, the height of the guide block is basically the same as the height of the paper roll, and the guide block is located inside the first baffle and the second baffle.

4. The label printer as described in claim 1, characterized in that, The lower end of the first cavity wall is tilted backward, and the lower end of the surface of the guide block opposite to the first cavity wall is also tilted backward.

5. The label printer as described in claim 1, characterized in that, The first baffle and / or the second baffle are provided with a baffle plate on the top of the inner side, and the guide block is located at the end of the baffle plate near the paper feeding end of the label roll.

6. The label printer as described in claim 1, characterized in that, The first baffle is fixedly disposed at one end of the paper roll, the second baffle is slidably connected to the paper roll, the guide block is located inside the first baffle and the second baffle, and the edge of the second baffle corresponding to the guide block protrudes toward the first cavity wall relative to the surface of the guide block opposite to the first cavity wall.

7. The label printer as described in claim 1, characterized in that, The rear end of the cover away from the first cavity wall is hinged to the housing. A driving component is provided at the front end of the cover. The driving component cooperates with the printing component to drive the unfolded portion of the label roll paper to extend outward. The front end of the cover is detachably connected to the housing. Locking blocks protruding inward along the axial direction of the paper roll shaft are provided on both sides of the first cavity wall. Locking grooves are provided in the locking blocks, and locking buckles are provided in the locking grooves. When the front end of the cover is connected to the housing, the locking buckles engage with the driving component to fix the cover. In the axial direction of the paper roll shaft, the guide block on the first baffle is located inside the corresponding locking block. During printing, the side of the unfolded portion of the label roll paper near the first baffle is restricted to move to the left by the locking block corresponding to the guide block on the first baffle.

8. The label printer as described in claim 1, characterized in that, The first baffle is fixedly disposed at one end of the paper roll, the second baffle is slidably connected to the paper roll, the rear end of the cover away from the first cavity wall is hinged to the housing, the front end of the cover is provided with a driving component, the driving component cooperates with the printing component, and is used to drive the unfolded part of the label roll to extend outward; the front end of the cover is detachably connected to the housing, and a stop member is provided on the inner surface of the cover facing the accommodating cavity. When the second baffle moves on the paper roll towards the first baffle to a preset position and the front end of the cover is connected to the housing, the stop member stops the second baffle.

9. The label printer as described in claim 1, characterized in that, The paper roll is provided with a plurality of positioning points at intervals for positioning the second baffle. The inner surface of the machine cover is also provided with a plurality of stop blocks at intervals. The top of the second baffle is provided with a protrusion that can be inserted between two adjacent stop blocks.

10. The label printer as described in claim 1, characterized in that, A connecting plate is fitted onto the outer wall of one end of the paper roll. One side of the connecting plate abuts against the inner wall of the first baffle. A mounting base is provided on the outer side of the connecting plate. An insertion groove is provided on the outer wall of the mounting base. A locking groove is provided on the inner end of the outer wall of the mounting base. The insertion groove and the locking groove are connected. A climbing block is fixed on the inner end of the outer wall of the mounting base. The climbing block is located in the locking groove. A locking block is fixed on the inner wall of the first baffle. The climbing block and the locking block can be fitted together.

11. The label printer as described in claim 1, characterized in that, The second baffle has a shaft hole, into which the paper roll is inserted. A first positioning block and a second positioning block are respectively installed on the first and second sides of the shaft hole. The first positioning block and the second positioning block are correspondingly arranged. A first positioning groove and a second positioning groove are respectively opened on the first and second sides of the outer wall of the paper roll. The first positioning block is adapted to be inserted into the first positioning groove, and the second positioning block is adapted to be inserted into the second positioning groove.

12. The label printer as described in claim 11, characterized in that, The height of the first positioning block is greater than the height of the second positioning block.

13. The label printer as described in claim 1, characterized in that, The second baffle has a shaft hole, into which the paper roll is inserted. A first stabilizing plate is installed on the third side of the shaft hole. A first buckle is provided on the side of the first stabilizing plate facing the paper roll. The first buckle moves along the third surface of the outer wall of the paper roll along the axial direction. A first slot is provided on the third surface of the outer wall of the paper roll along the axial direction. There are multiple first slots, which are distributed along the axial direction of the paper roll. The first buckle is used to cooperate with the first slot to position the second baffle.

14. The label printer as described in claim 13, characterized in that, A second stabilizing plate is installed on the fourth side of the shaft hole. A second buckle is provided on the side of the second stabilizing plate facing the paper roll shaft. The second buckle moves along the fourth surface of the paper roll shaft. A second slot is opened on the fourth surface of the outer wall of the paper roll shaft. There are multiple second slots, and the multiple second slots are distributed along the axial direction of the paper roll shaft.

15. The label printer as described in claim 14, characterized in that, The first stabilizing plate has a flat surface facing the paper roll shaft, the third surface of the paper roll shaft's axial outer wall is a flat surface, the second stabilizing plate has an arc-shaped surface facing the paper roll shaft, and the fourth surface of the paper roll shaft's axial outer wall is an arc-shaped surface.

16. The label printer as described in claim 14, characterized in that, The outer wall of the second baffle is provided with a locking element, which is used to lock the first stabilizing plate and / or the second stabilizing plate.

17. The label printer as described in claim 16, characterized in that, The locking element includes a movable plate and a pressure block. The movable plate is slidably connected to the outer wall of the second baffle, and the pressure block is disposed on the movable plate. The movable plate slides along the second baffle to control whether the pressure block abuts against the first stabilizing plate or the second stabilizing plate.

18. The label printer as claimed in claim 17, characterized in that, The movable plate has snap-fit ​​buckles at both ends of its inner side. The two snap-fit ​​buckles protrude outward from opposite sides away from the movable plate. The second baffle has snap-fit ​​grooves through both ends of its sidewall for the snap-fit ​​buckles to be inserted. The widest distance between the protruding parts of the two snap-fit ​​buckles is greater than the maximum distance between the two snap-fit ​​grooves. The snap-fit ​​buckles are elastic. After the two snap-fit ​​buckles are inserted into their respective snap-fit ​​grooves, the protruding parts of the snap-fit ​​buckles contact the inner wall of the second baffle. The movement of the snap-fit ​​buckles along the snap-fit ​​grooves can control whether the pressure block abuts against the first or second stabilizing plate.

19. The label printer as described in claim 16, characterized in that, One end of the movable plate is equipped with an elastic hook, and a limit post is fixed on the outer wall of the second baffle. The elastic hook and the limit post engage when the pressure block abuts against the first stabilizing plate and / or the second stabilizing plate. A push plate is fixed on the outer side of the movable plate.

Images