A printer structure that can be adapted to different size core paper rolls

Abstract

The utility model relates to printer equipment technical field especially relates to a kind of printer structure that can adapt to different size roll core paper roll, including upper shell subassembly, bottom shell subassembly and paper shaft support, upper shell subassembly is connected on bottom shell subassembly, paper shaft support is fixed in the inside of bottom shell subassembly, the utility model further includes large roll core paper shaft shell, which is connected to the paper shaft support, forming a telescopic paper shaft structure for adapting to different size roll core paper roll;Card slot is opened in paper shaft support, small shaft is arranged in the card slot, through hole matched with small shaft is opened in the middle position of large roll core paper shaft shell, and large roll core paper shaft shell is installed in the card slot of paper shaft support.The utility model completely solves the compatibility problem of different specifications of paper roll for printer.By movably connecting large roll core paper shaft shell to paper shaft support, a telescopic paper shaft structure is formed.User does not need any tool, and only needs to push and pull to realize the switching of two modes.

Description

Technical Field

[0001] This utility model relates to the field of printer equipment technology, and in particular to a printer structure that can adapt to paper rolls of different sizes. Background Technology

[0002] Currently, thermal printers, receipt printers, and other office equipment are widely used in daily work and life, and they use paper rolls for printing. These paper rolls vary considerably in diameter due to their different uses and specifications. Currently, the vast majority of printers on the market use a fixed paper roll design for their paper feeding mechanism, primarily employing the following two common solutions:

[0003] A common existing technology is to use a small-sized fixed paper spool. This design is for paper rolls with small internal core apertures, such as the most common 25.4mm (1-inch) core rolls. The diameter of the paper spool matches the inner diameter of the paper roll core, which can effectively clamp and stably drive the paper roll to rotate, enabling normal paper feeding.

[0004] Another common existing technology is to use a large-diameter fixed paper shaft. This design is used to accommodate paper rolls with larger internal core apertures, such as the industry-common 40mm core rolls. The large-diameter paper shaft can provide a larger contact and support area, ensuring the stability of large paper rolls when rotating at high speeds.

[0005] However, the above two fixed paper shaft designs have the following technical problems in practical applications:

[0006] 1. Printers using small-sized fixed paper shafts (such as those adapted to 25.4mm cores) can theoretically accommodate large cores (such as 40mm), but because the shaft diameter is much smaller than the core hole diameter, a mismatch gap exists between the two. This causes the large paper roll to wobble on the paper shaft when rotating, making it unable to be stably driven. This results in unstable paper feeding, paper jams, or poor print quality, failing to meet actual usage requirements.

[0007] 2. To ensure print quality and stability, printer manufacturers typically equip each device with a fixed paper roll size. Once a user selects a device, the paper roll specifications they can reliably use are essentially fixed. When a user's business needs change and they need to switch to paper rolls with different core diameters, they face the problem of incomplete compatibility, reducing the printer's flexibility and forcing users to purchase multiple dedicated printers for different paper roll specifications, significantly increasing equipment purchase costs and space occupancy. Utility Model Content

[0008] The purpose of this invention is to provide a printer structure that can adapt to different sizes of paper roll cores, thus completely solving the printer's compatibility problem with different paper roll specifications. By movably connecting the large paper roll core housing to the paper roll support, a retractable paper roll structure is formed. Users can switch between the two modes simply by pushing and pulling, without any tools.

[0009] The technical solution adopted by this utility model to solve the above-mentioned technical problems is: a printer structure that can adapt to paper rolls of different sizes, including an upper shell assembly, a bottom shell assembly and a paper shaft support. The upper shell assembly is connected to the bottom shell assembly, and the paper shaft support is fixed inside the bottom shell assembly. It also includes a large core paper shaft shell, which is connected to the paper shaft support to form a telescopic paper shaft structure for adapting to paper rolls of different sizes.

[0010] The paper shaft support has a slot, and a small shaft is placed in the slot. The large core paper shaft shell has a through hole in the middle position that mates with the small shaft. The large core paper shaft shell is installed in the slot of the paper shaft support and can move between a first position and a second position.

[0011] When the large core paper roll shell is in the first position, it is partially housed in the paper roll support, and the small shaft is exposed to the outside for adapting to the small core paper roll.

[0012] When the large core paper shaft shell is in the second position, it extends partially from the paper shaft support. The large core paper shaft shell and the small shaft together form a shaft body for adapting to the large core paper roll.

[0013] Furthermore, the paper shaft support is provided with an arc-shaped retaining edge, and a snap-fit ​​groove is formed on the arc-shaped retaining edge.

[0014] Furthermore, the large core paper shaft shell is provided with a hook that cooperates with the snap-fit ​​groove. The hook can move within the snap-fit ​​groove, allowing the large core paper shaft shell to move relative to the paper shaft support. The cooperation between the hook and the snap-fit ​​groove can prevent the large core paper shaft shell from detaching from the paper shaft support.

[0015] Furthermore, multiple positioning cards A are fixedly connected to the paper shaft support and arranged around the small shaft, with protrusions A on the positioning cards A; positioning cards B corresponding to the positions of the positioning cards A are provided on the large core paper shaft shell, with protrusions B on the positioning cards B for engaging with the protrusions A.

[0016] Furthermore, the large core paper roll housing is provided with a handle for easy user operation.

[0017] The advantages of this utility model are:

[0018] This invention completely solves the printer's compatibility problem with different paper roll sizes. By movably connecting the large core paper roll housing to the paper roll support, a retractable paper roll structure is formed. Users can switch between two modes simply by pushing and pulling, without any tools.

[0019] Small core adaptation mode: When the large core paper roll shell is in the first position (push-in state), it is completely housed within the paper roll support, making the small shaft on the paper roll support fully exposed. At this time, the structure is completely equivalent to a traditional small-sized fixed paper roll, which can adapt to small core paper rolls and ensure stable clamping.

[0020] Large core adaptation mode: When the large core paper roll shell is in the second position (pull-out state), it extends partially from the paper roll support. At this time, the outer wall of the large core paper roll shell and the exposed small shaft together form a composite shaft with a larger effective diameter, thus enabling seamless adaptation to the large core paper roll. Attached Figure Description

[0021] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 This is a schematic diagram of the structure of the present invention after the paper roll is assembled.

[0024] Figure 3 This is an assembly diagram showing the relationship between the paper shaft support and the large core paper shaft shell in this utility model.

[0025] Figure 4 This is an enlarged structural schematic diagram of the paper shaft support in this utility model.

[0026] Figure 5 This is an enlarged structural diagram of the large core paper roll housing of this utility model. Figure 1 .

[0027] Figure 6 This is an enlarged structural diagram of the large core paper roll housing of this utility model. Figure 2 .

[0028] Figure 7 This is a schematic diagram showing the state of the large core paper shaft shell after it is pushed into the paper shaft support in this utility model.

[0029] Figure 8This is a schematic diagram showing the state of the large core paper roll shell after it has been pulled out of the paper roll support in this utility model.

[0030] The components are as follows: 1. Upper shell assembly; 2. Bottom shell assembly; 3. Paper roll support; 301. Small shaft; 302. Slot; 303. Arc-shaped edge; 3031. Buckle slot; 304. Positioning card A; 3041. Protrusion A; 4. Large core paper roll shell; 401. Handle; 402. Hook; 403. Through hole; 404. Arc-shaped hole; 405. Positioning card B; 4051. Protrusion B; 5. Paper roll. Detailed Implementation

[0031] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. The terms "installed," "connected," and "linked" should be interpreted broadly; for example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Example 1:

[0034] Figure 1 This is a three-dimensional structural diagram of the present invention. Figure 2 This is a schematic diagram of the structure of the present invention after the paper roll is assembled. Figure 3 This is an assembly diagram showing the relationship between the paper shaft support and the large core paper shaft shell in this utility model. Figure 4 This is an enlarged structural schematic diagram of the paper shaft support in this utility model. Figure 5 This is an enlarged structural diagram of the large core paper roll housing of this utility model. Figure 1 , Figure 6This is an enlarged structural diagram of the large core paper roll housing of this utility model. Figure 2 , Figure 7 This is a schematic diagram showing the state of the large core paper roll shell after it has been pushed into the paper roll support in this utility model. Figure 8 This is a schematic diagram showing the state of the large core paper roll shell after it has been pulled out of the paper roll support in this utility model. Figures 1 to 8 As shown, this embodiment provides a printer structure that can adapt to paper rolls of different sizes, and its three-dimensional structure is as follows. Figure 1 As shown, it mainly includes an upper shell assembly 1, a bottom shell assembly 2, a paper shaft support 3, and a large core paper shaft shell 4.

[0035] The upper shell assembly 1 is connected to the lower shell assembly 2 via clips or screws, together forming the main frame of the printer. The paper roll support 3 is fixed inside the lower shell assembly 2 and is the core component that supports the rotation of the paper roll. The large core paper roll shell 4 is movably connected to the paper roll support 3, together forming a retractable paper roll structure for seamlessly adapting to paper rolls 5 of different sizes.

[0036] The specific structure of the paper shaft support 3 is as follows: Figure 4 As shown, an elongated slot 302 is provided inside the paper shaft support 3, the length of which is aligned with the intended direction of movement of the large core paper shaft shell 4. A small shaft 301 is fixedly installed within the slot 302, directly supporting the small core paper roll. The paper shaft support 3 also has upwardly extending arc-shaped retaining edges 303 on both sides, which guide and accommodate the large core paper shaft shell 4. A latching groove 3031 is provided on the arc-shaped retaining edge 303.

[0037] In addition, two flexible positioning cards A304 are fixedly connected to the paper shaft support 3 around the small shaft 301. Each positioning card A304 has a protrusion A3041 at its end.

[0038] The specific structure of the large roll core paper shaft shell 4 is as follows: Figure 5 and Figure 6 As shown. Its main body is a circular shell structure, which, together with the arc-shaped retaining edge 303 of the paper shaft support 3, can form a complete cylindrical shaft. A through hole 403 is provided in the middle position to mate with the small shaft 301 on the paper shaft support 3, ensuring that the two can move relative to each other after assembly. On its outer shell, there are two hooks 402 that mate with the aforementioned retaining groove 3031. This utility model has multiple arc-shaped holes 404 on the large core paper shaft shell 4, and positioning cards B405 are installed in the arc-shaped holes 404. The positioning cards B405 have protrusions B4051 for engaging with protrusions A3041.

[0039] like Figure 3 and Figure 7 As shown, during installation, the large core paper roll shell 4 can be aligned with the slot 302 of the paper roll bracket 3, and then the hook 402 can be aligned with the slot 302. The large core paper roll shell 4 is then pressed down and pushed into the slot 302. At this time, the hook 402 is embedded in the slot 302. Due to the cooperation between the hook 402 and the slot 302, the large core paper roll shell 4 can move along the length direction of the slot 302 (i.e.,...). Figure 7 and Figure 8 The large core paper roll shell 4 can move smoothly between the first and second positions (in the left and right directions). This mating structure can also effectively prevent the large core paper roll shell 4 from coming off the paper roll support 3, thus ensuring the reliability of the structure.

[0040] The working principle and usage process of this utility model are as follows:

[0041] When installing a small core paper roll, the user requires no tools. The large core paper roll housing 4 is equipped with a handle 401 for easy user operation. Figure 8 As shown, the user can fully push the large core paper roll housing 4 into the paper roll support 3 using the handle 401, placing it in the first position (push-in state). In this position, most of the large core paper roll housing 4 is housed within the arc-shaped retaining edge 303 of the paper roll support 3, with its outer surface flush with the surface of the paper roll support 3. The small shaft 301 on the paper roll support 3 is then fully exposed. At this point, the entire paper feeding structure is equivalent to a traditional small-sized fixed paper roll. The user can simply place the core hole of the small core paper roll onto the small shaft 301. The paper roll is independently supported and driven by the small shaft 301, ensuring tight contact and no wobble or gaps, thus guaranteeing the stability of paper feeding and printing.

[0042] When installing a large roll of paper core, the user simply hooks the handle 401 with their finger and pulls the large roll paper core housing 4 out of the paper core bracket 3 along the direction of the slot 302, placing it in the second position (pull-out state). Figure 7 As shown. In this position, the large core paper roll housing 4 extends partially from the paper roll support 3. At this time, the outer wall of the large core paper roll housing 4 and the outer surface of the small shaft 301, which is not completely covered, together form a composite shaft with a larger effective diameter. When the user places the core hole of the large core paper roll onto this composite shaft, the outer wall of the shaft and the inner wall of the paper roll core are in full contact, providing sufficient support area, thereby effectively preventing the large paper roll from shaking when rotating at high speed and ensuring stable printing quality.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and not to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A printer structure adaptable to paper rolls of different sizes, comprising an upper shell assembly (1), a bottom shell assembly (2), and a paper roll support (3), wherein the upper shell assembly (1) is connected to the bottom shell assembly (2), and the paper roll support (3) is fixed inside the bottom shell assembly (2), characterized in that, It also includes a large core paper shaft shell (4), which is connected to the paper shaft support (3) to form a retractable paper shaft structure for adapting paper rolls (5) with different sizes of cores. The paper shaft support (3) has a slot (302) inside, and a small shaft (301) is provided in the slot (302). The large core paper shaft shell (4) has a through hole (403) in the middle position that cooperates with the small shaft (301). The large core paper shaft shell (4) is installed in the slot (302) of the paper shaft support (3) and can move between the first position and the second position. When the large core paper roll shell (4) is in the first position, it is partially housed in the paper roll support (3), and the small shaft (301) is exposed to the outside for adapting to the paper roll (5) of the small core. When the large core paper shaft shell (4) is in the second position, it extends partially from the paper shaft support (3). The large core paper shaft shell (4) and the small shaft (301) together form a shaft body for adapting the large core paper roll (5).

2. The printer structure according to claim 1, which can adapt to different sizes of roll core paper, is characterized in that, The paper shaft support (3) is provided with an arc-shaped retaining edge (303), and a buckle groove (3031) is provided on the arc-shaped retaining edge (303).

3. A printer structure adaptable to different sizes of core paper rolls according to claim 2, characterized in that, The large core paper shaft shell (4) is provided with a hook (402) that cooperates with the snap-fit ​​groove (3031). The hook (402) can move in the snap-fit ​​groove (3031) so that the large core paper shaft shell (4) can move relative to the paper shaft support (3).

4. A printer structure adaptable to different sizes of roll core paper as described in claim 1, characterized in that, The paper shaft support (3) is fixedly connected with multiple positioning cards A (304) arranged around the small shaft (301), and the positioning card A (304) is provided with a protrusion A (3041); the large core paper shaft shell (4) is provided with a positioning card B (405) corresponding to the position of the positioning card A (304), and the positioning card B (405) is provided with a protrusion B (4051) for engaging with the protrusion A (3041).

5. A printer structure adaptable to different sizes of core paper rolls according to claim 1, characterized in that, The large core paper roll housing (4) is provided with a handle (401) for easy operation by the user.

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