A lockable paper roll assembly for a label printer

Abstract

The application provides a lockable paper roll shaft assembly of a label printer, which comprises a paper roll shaft, a first baffle and a second baffle, the first baffle is sleeved on the outer wall of the paper roll shaft, a plurality of positioning points for positioning the second baffle are arranged on the paper roll shaft at intervals, a first stabilizing plate and / or a second stabilizing plate are installed in the second baffle, and the first stabilizing plate and / or the second stabilizing plate are limited at the positioning points.

Description

Technical Field

[0001] This invention relates to the field of label printers, and particularly to a lockable paper roll assembly for 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, a left baffle and a right baffle are fitted onto both ends of the paper roll, respectively. The left and right baffles clamp the label roll between them and limit its movement. Finally, the assembled paper roll and label roll are installed into the paper tray.

[0004] Currently, the left baffle is fixed or locked to one end of the paper roll. Then, the right baffle is adjusted to limit the label roll, making it convenient for users to install the label roll. However, during the operation of the label printer, the right baffle and the paper roll are prone to slippage, which affects the limiting effect of the label roll. Summary of the Invention

[0005] In view of this, the purpose of this utility model is to provide a lockable paper roll assembly for a label printer, which solves the problem of slippage between the existing right baffle and the paper roll.

[0006] To solve the above-mentioned technical problems, the technical solution used in this utility model is as follows:

[0007] The present invention discloses a lockable paper roll assembly for a label printer, comprising a paper roll, a first baffle, and a second baffle. The first baffle is sleeved on the outer wall of the paper roll, and a plurality of positioning points for positioning the second baffle are spaced apart on the paper roll. A first stabilizing plate and / or a second stabilizing plate are installed inside the second baffle, and the first stabilizing plate and / or the second stabilizing plate are limited at the positioning points.

[0008] Preferably, the first stabilizing plate and / or the second stabilizing plate are elastic, and a movable plate is slidably connected to the outer wall of the second baffle. A pressure block is provided on the movable plate, and the movable plate slides along the second baffle to control whether the pressure block abuts against the first stabilizing plate and / or the second stabilizing plate.

[0009] Preferably, the two ends of the inner side of the movable plate are respectively provided with snap-fit ​​buckles, and the opposite side of the two snap-fit ​​buckles protrudes outward from the end away from the movable plate. The two ends of the side wall of the second baffle are respectively provided with snap-fit ​​grooves for the snap-fit ​​buckles to be inserted into. 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.

[0010] Preferably, a first positioning post is fixed to the inner side of the movable plate, and a first movable groove is provided through the side wall of the second baffle for the first positioning post to pass through. A second positioning post is fixed to the inner side of the movable plate away from the first positioning post, and a second movable groove is provided through the side wall of the second baffle for the second positioning post to pass through. The diameter of the second positioning post is larger than the diameter of the first positioning post, and the width of the first movable groove is adapted to the diameter of the first positioning post, and the width of the second movable groove is adapted to the diameter of the second positioning post.

[0011] Preferably, a mounting base is provided on the outer wall of one end of the paper roll, the outer wall of the mounting base has an insertion groove, and the inner end of the outer wall of the mounting base has a locking groove. The insertion groove and the locking groove are connected. A climbing block is fixed to 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 to the inner wall of the first baffle. The climbing block and the locking block can be fitted and inserted together.

[0012] Preferably, an elastic hook is installed at one end of the movable plate, and 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.

[0013] Preferably, a push plate is fixed to the outside of the movable plate, and there are two push plates located at both ends of the outside of the movable plate.

[0014] 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.

[0015] 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.

[0016] 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.

[0017] The beneficial effects of the present invention are as follows: a plurality of positioning points for positioning the second baffle are provided at intervals on the paper roll. When the second baffle moves to the side of the label roll, the first stabilizing plate and / or the second stabilizing plate are limited at the corresponding positioning points, thereby limiting the second baffle. This can reduce the possibility of the second baffle sliding along the paper roll and thus better limit the label roll. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application.

[0020] Figure 2 This is a cross-sectional view of an embodiment of this application.

[0021] Figure 3 This is a schematic diagram of the first baffle.

[0022] Figure 4 This is a schematic diagram of the top structure of a paper roll.

[0023] Figure 5 This is an assembly drawing of the paper roll, the second baffle, and the locking plate.

[0024] Figure 6 This is a schematic diagram of the bottom structure of a paper roll.

[0025] Figure 7 This is a schematic diagram of the second baffle.

[0026] Figure 8 This is a schematic diagram of the locking plate.

[0027] Figure 9 This is a structural schematic diagram of the locking plate from another perspective.

[0028] 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; 2. Machine cover; 3. Paper roll; 31. First positioning slot; 32. Second positioning slot; 33. First slot; 34. Second slot; 35. Connecting plate; 36. Mounting base; 361. Insertion slot; 362. Locking slot; 4. First baffle; 5. Second baffle; 51. Shaft hole; 52. Mounting plate; 53. First positioning block; 54. ... 55. First stabilizing plate; 56. Second stabilizing plate; 57. First buckle; 58. Second buckle; 59. Snap-fit ​​groove; 6. Label roll paper; 7. Locking component; 71. Movable plate; 711. Sliding groove; 712. Snap-fit ​​buckle; 713. First positioning post; 714. Second positioning post; 721. First movable groove; 722. Second movable groove; 73. Pressing block; 74. Elastic hook; 75. Limiting post; 76. Push plate; 81. Locking block; 82. Climbing block. Detailed Implementation

[0029] To facilitate understanding of the present invention, a more comprehensive description will be given below with reference to the accompanying drawings.

[0030] 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.

[0031] 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.

[0032] refer to Figures 1-9 This invention provides a lockable paper roll assembly for a label printer, including a housing 1 and a cover 2. One end of the cover 2 is hinged to one end of the top 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.

[0033] 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 receiving cavity.

[0034] 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.

[0035] A connecting plate 35 is fixedly sleeved on the outer wall of the left end of the paper roll 3. A mounting base 36 is fixed on the outer side of the connecting plate 35. A insertion groove 361 is opened on the outer wall of the mounting base 36. A locking groove 362 is opened on the inner end of the outer wall of the mounting base 36. The insertion groove 361 and the locking groove 362 are in communication. The printer also includes a locking component, which includes a locking block 81 and a climbing block 82. The climbing block 82 is fixed on the inner end of the outer wall of the mounting base 36. The climbing block 82 is located in the locking groove 362. The locking block 81 is fixed on the inner wall of the first baffle 4.

[0036] When the first baffle 4 is installed with the paper roll 3, the left end of the paper roll 3 and the mounting base 36 pass through the first baffle 4, and one side of the connecting plate 35 abuts against the inner wall of the first baffle 4. At the same time, the locking block 81 enters from the insertion slot 361. Then, the paper roll 3 is rotated so that the locking block 81 enters the locking slot 362. The locking block 81 has a recess on the side near the climbing block 82. The paper roll 3 is rotated until the climbing block 82 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.

[0037] 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.

[0038] 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.

[0039] 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 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. Accordingly, 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.

[0040] 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.

[0041] A first positioning groove 31 is provided on the first side of the outer wall of the paper roll 3 along the axis, and a second positioning groove 32 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 31. 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 32. The first positioning block 53 moves along the first positioning groove 31, and the second positioning block 54 moves along the second positioning groove 32, thereby guiding the second baffle 5 to move along the axis of the paper roll 3.

[0042] 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 31 and the second positioning groove 32 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 31 and the second positioning groove 32 respectively, which makes the installation of the second baffle 5 more convenient.

[0043] 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.

[0044] The first stabilizing plate 55 and the second stabilizing plate 56 are elastic. The first stabilizing plate 55 is fixed with a first buckle 57 at the outer end of its side facing the paper roll 3. The third surface of the paper roll 3 along the axial direction is provided with a plurality of first slots 33 spaced apart. The plurality of first slots 33 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 33. Correspondingly, the second stabilizing plate 56 is fixed with a second buckle 58 at the outer end of its side facing the paper roll 3. The first buckle 57 and the second buckle 58 are in the same vertical direction. The fourth surface of the paper roll 3 along the axial direction is provided with a plurality of second slots 34 spaced apart. The plurality of second slots 34 are evenly distributed along the axial direction of the paper roll 3. The positions of the second slots 34 and the first slots 33 correspond to each other, so that the first buckle 57 is located in the first slot 33 while the second buckle 58 is located in the corresponding second slot 34, thereby positioning the second baffle 5 and forming a plurality of positioning points on the paper roll 3.

[0045] 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 31, and the second positioning block 54 is inserted into the second positioning groove 32. 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 33 and the second latch 58 is inserted into the second latch 34, the user needs to apply greater force to push the first latch 57 out of the first latch 33 and the second latch 58 out of the second latch 34. The first latch 57, pushed out of the first latch 33, 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 33 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 33. 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.

[0046] 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 33 and the second buckle 58 is inserted into the second slot 34, 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 33 and the second buckle 58 is inserted into the corresponding second slot 34, 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.

[0047] The outer wall of the second baffle 5 is provided with a locking element 7, which includes a movable plate 71. The middle of the side wall of the movable plate 71 is provided with a sliding groove 711 through which the first stabilizing plate 55, the second stabilizing plate 56 and the mounting plate 52 move. The sliding groove 711 allows the movable plate 71 to slide along the outer wall of the second baffle 5.

[0048] The inner side of the movable plate 71 is fixed with a snap fastener 712. There are two snap fasteners 712, which are distributed at the top and bottom of the movable plate 71. The snap fastener 712 at the top protrudes upward at the end away from the movable plate 71, and the snap fastener 712 at the bottom protrudes downward at the end away from the movable plate 71. Correspondingly, the side wall of the second baffle 5 is provided with a snap groove 59. The snap fastener 712 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 712 is greater than the maximum distance between the two snap grooves 59.

[0049] The latch 712 is elastic. When a relative force is applied to the two latches 712, pressing the two latches 712 shortens the widest distance between the protruding parts of the two latches 712, so that the two latches 712 can pass through the corresponding latching groove 59 at the same time. Then, the force applied to the latches 712 is released, and the protruding parts of the two latches 712 abut against the inner side of the second baffle 5. The movable plate 71 is engaged with the second baffle 5 through the latches 712. The latches 712 can move along the long side of the latching groove 59, thereby driving the movable plate 71 to move along the outer side wall of the second baffle 5.

[0050] To ensure greater stability of the movable plate 71 as it moves along the second baffle 5 and reduce wobbling during its movement, a first positioning post 713 is fixed to one end of the movable plate 71 near the latch 712, and a second positioning post 714 is fixed to the other end of the movable plate 71 away from the first positioning post 713. Correspondingly, a first movable groove 721 is formed through the side wall of the second baffle 5 for the first positioning post 713 to pass through, with the long side of the first movable groove 721 parallel to the long side of the latch groove 59. A second movable groove 722 is formed through the side wall of the second baffle 5 for the second positioning post 714 to pass through, with the long side of the second movable groove 722 parallel to the long side of the first movable groove 721. During the movement of the movable plate 71, the first positioning post 713 moves along the long side of the first movable groove 721, and the second positioning post 714 moves along the long side of the second movable groove 722, thereby guiding the movement of the movable plate 71.

[0051] The lengths of the first movable groove 721 and the second movable groove 722 are the same. The range of movement of the first positioning post 713 along the first movable groove 721 and the range of movement of the second positioning post 714 along the second movable groove 722 can limit the range of movement of the movable plate 71 along the second baffle 5, thereby playing a positioning role.

[0052] A pressure block 73 is fixed on the side of the movable plate 71 away from the snap fastener 712. The pressure block 73 is located at the end of the movable plate 71 near the second positioning post 714. There are two pressure blocks 73, which are respectively set at the top and bottom of the movable plate 71. The two pressure blocks 73 are set correspondingly. The inner side of the pressure block 73 protrudes from the inner wall of the movable plate 71, and the protruding part of the pressure block 73 extends to the other side of the snap fastener 712.

[0053] When the second positioning post 714 is located at the end of the second movable groove 722 away from the second positioning block 54, correspondingly, the first positioning post 713 is located at the end of the first movable groove 721 near the first positioning block 53. The two pressure blocks 73 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 71 is moved to move the second positioning post 714 to the end of the second movable groove 722 near the first positioning block 54. At one end of the two positioning blocks 54, the first positioning post 713 moves to the end of the first movable groove 721 away from the first positioning block 53. The inner sidewalls of the two pressure blocks 73 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 73 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 33, and the second latch 58 is difficult to move out of the second slot 34, 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.

[0054] An elastic hook 74 is installed at the end of the movable plate 71 away from the second positioning post 714. Correspondingly, a limiting post 75 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 73, the elastic hook 74 and the limiting post 75 are separated. When it is necessary to lock the second baffle 5, the movable plate 71 is pushed, which moves the first positioning post 713 to the end of the first movable groove 721 away from the first positioning block 53. During this process, the elastic hook 74 is pushed close to the limiting post 75, so that the limiting post 75 enters the interior of the elastic hook 74 from the opening. The limiting post 75 can restrict the movement of the elastic hook 74. When the first stabilizing plate 55 and the second stabilizing plate 56 are abutted by the corresponding pressure block 73, the movable plate 71 can be locked with the cooperation of the elastic hook 74 and the limiting post 75, reducing the movement of the movable plate 71 and thus better locking the second baffle 5.

[0055] The diameter of the second positioning post 714 is larger than that of the first positioning post 713. The width of the first movable groove 721 is adapted to the diameter of the first positioning post 713, and the width of the second movable groove 722 is adapted to the diameter of the second positioning post 714. This guides the user to correctly install the lock 7 on the outer wall of the second baffle 5, so that the elastic hook 74 can be located on one side of the limiting post 75, reducing the possibility of the lock 7 being installed backwards.

[0056] A push plate 76 is fixed on the side of the movable plate 71 away from the snap fastener 712. There are two push plates 76, which are located at both ends of the outer side of the movable plate 71. Under the action of the push plates 76, the movable plate 71 can be moved by pushing the push plates 76, which is convenient for the user to operate. When disassembling the lock 7, the push plates 76 can also be pulled as an auxiliary force to facilitate the disassembly of the lock 7.

[0057] 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.

[0058] 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.

[0059] 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 lockable paper roll assembly for a label printer, characterized in that, It includes a paper roll, a first baffle and a second baffle. The first baffle is sleeved on the outer wall of the paper roll. The paper roll has a plurality of positioning points spaced apart for positioning the second baffle. A first stabilizing plate and / or a second stabilizing plate are installed inside the second baffle. The first stabilizing plate and / or the second stabilizing plate are limited at the positioning points.

2. The lockable paper roll axle assembly of a label printer of claim 1, wherein, The first stabilizing plate and / or the second stabilizing plate are elastic. A movable plate is slidably connected to the outer wall of the second baffle. A pressure block is provided on the movable plate. The movable plate slides along the second baffle to control whether the pressure block abuts against the first stabilizing plate and / or the second stabilizing plate.

3. A lockable paper roll axle assembly for a label printer as defined in claim 2, wherein, 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 which the snap-fit ​​buckles can 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.

4. The lockable paper roll axle assembly of a label printer of claim 1, wherein, A mounting base is provided on the outer wall of one end of the paper roll. The outer wall of the mounting base has an insertion groove. 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 and inserted together.

5. The lockable paper roll assembly of a label printer of claim 2, wherein, A first positioning post is fixed to the inner side of the movable plate. A first movable groove is provided through the side wall of the second baffle for the first positioning post to pass through. A second positioning post is fixed to the inner side of the movable plate away from the first positioning post. A second movable groove is provided through the side wall of the second baffle for the second positioning post to pass through. The diameter of the second positioning post is larger than the diameter of the first positioning post. The width of the first movable groove is adapted to the diameter of the first positioning post, and the width of the second movable groove is adapted to the diameter of the second positioning post.

6. The lockable paper roll axle assembly of a label printer of claim 2, wherein, One end of the movable plate is equipped with an elastic hook, and the outer wall of the second baffle is fixed with a limiting post. The elastic hook and the limiting post engage when the pressure block abuts against the first stabilizing plate and / or the second stabilizing plate.

7. The lockable paper roll axle assembly of a label printer of claim 2, wherein, A push plate is fixed to the outside of the movable plate. There are two push plates, which are located at both ends of the outside of the movable plate.

8. The lockable paper roll axle assembly of a label printer of claim 1, wherein, 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.

9. A lockable paper roll assembly for a label printer as claimed in claim 8, wherein, 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.

10. The lockable paper roll axle assembly of a label printer of claim 1, wherein, 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.

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