Printer paper roll support

Abstract

The utility model relates to the technical field of paper roll printers, in particular to a printer paper roll support, which is characterized in that a first limit structure is arranged at a first end of a paper roll shaft, a first locking structure is arranged on the first limit structure, and a second limit structure is arranged on a first support. During installation, only the first end needs to be sleeved with the first support, the first support rotates relative to the paper reel, the second limiting structure reaches the position corresponding to the first limiting structure, and therefore the axial movement freedom degree of the first support is restrained; the first support continues to be rotated to enable the second locking structure to reach the position corresponding to the first locking structure, so that the axial rotation freedom degree of the first support is restrained, and fixed installation of the first support and the paper reel is achieved; and during disassembly, the first bracket can be disassembled from the paper roll shaft to replace the paper roll only by reversely rotating the first bracket with a hand, so that the operation is convenient and quick.

Description

A printer paper roll holder Technical Field

[0001] This utility model relates to the field of paper roll printer technology, and in particular to a printer paper roll holder. Background Technology

[0002] Paper roll printers use a paper roll holder to install and fix the paper roll inside, ensuring stable paper roll feeding. However, when the paper roll is used up, it needs to be replaced. The paper roll holder disclosed in Chinese utility model patent CN202322785955X - A Paper Roll Component Assembly Machine uses screws to fasten the material roller and the fixing frame. Therefore, when replacing the paper roll, the user must first remove the screws to separate the fixing frame from the material roller, which is difficult and cumbersome to operate. Summary of the Invention

[0003] To solve the above-mentioned technical problems, this utility model provides a printer paper roll holder, comprising:

[0004] A paper roll has a first end, a first limiting structure is provided on the first end, and a first locking structure is provided on the first limiting structure;

[0005] The first bracket is provided with a second limiting structure, and the second limiting structure is provided with a second locking structure;

[0006] The first bracket is sleeved on the first end, and the first bracket rotates relative to the paper roll shaft until the second limiting structure cooperates with the first limiting structure to constrain the axial movement freedom of the first bracket, and the second locking structure cooperates with the first locking structure to constrain the axial rotation freedom of the first bracket.

[0007] In some possible embodiments, the paper roll is sleeve-shaped, and the first limiting structure includes a first vertical segment extending outward from the first end along the axial direction and a first limiting segment extending horizontally towards the axis from one end of the first vertical segment. The first limiting segment gradually protrudes inward from the first vertical segment from its starting end. The second limiting structure is an arc-shaped hole formed on the first support. The opening shape at one end of the arc-shaped hole is adapted to the first limiting segment. When the first support is sleeved on the first end, the first limiting segment can pass through one end of the arc-shaped hole. The first limiting segment rotates with the first support relative to the paper roll to the outside of the first support.

[0008] In some possible embodiments, the first locking structure is a groove formed in the middle of the first vertical section, the second locking structure is located on the outer surface of the first bracket and is arranged horizontally outward, and the working surface of the second locking structure is a protruding arc shape.

[0009] In some possible embodiments, the paper roll is sleeve-shaped, the first limiting structure is formed on the inner wall of the paper roll, and the first limiting structure gradually protrudes from the inner wall of the paper roll from its starting end; the second limiting structure is a limiting groove protruding axially from the inner side of the first bracket, the opening side of the limiting groove is horizontally arranged, and when the first bracket is sleeved on the first end and rotates relative to the paper roll, the second limiting structure rotates with the first bracket and gradually sleeves on the first limiting structure.

[0010] In some possible embodiments, the first locking structure is a groove disposed in the middle of the first limiting structure, and the second locking structure is a pin protruding axially from the inner wall of the limiting groove.

[0011] In some possible embodiments, the second limiting structure includes a second vertical segment protruding axially from the inner side of the first support and a second limiting segment extending horizontally outward from one end of the second vertical segment. The horizontal extension length of the second limiting segment is adapted to the length of the first limiting structure protruding from the inner wall of the paper roll. The distance between the second limiting segment and the first support is adapted to the height dimension of the first limiting structure.

[0012] In some possible embodiments, a second support is also included, the paper roll having a second end with a support ring platform thereon, the second support being able to be sleeved onto the paper roll from the first end and fixed on the support ring platform.

[0013] In some possible embodiments, at least one first positioning structure is provided on the support ring platform, and at least one second positioning structure is correspondingly provided on the second bracket. The outer wall of the paper roll at the second end is provided with gradually protruding ribs, and the second bracket is fitted into the second end and gradually presses against the ribs.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: The printer paper roll holder of this utility model is provided with a first limiting structure at the first end of the paper roll shaft, a first locking structure on the first limiting structure, a second limiting structure on the first holder, and a second locking structure on the second limiting structure. During installation, it is only necessary to put the first holder on the first end and rotate the first holder relative to the paper roll shaft so that the second limiting structure reaches the position corresponding to the first limiting structure, thereby restricting the axial movement freedom of the first holder. Continue to rotate the first holder so that the second locking structure reaches the position corresponding to the first locking structure, thereby restricting the axial rotation freedom of the first holder, thus realizing the fixed installation of the first holder and the paper roll shaft. During disassembly, it is only necessary to manually apply force to rotate the first holder in the opposite direction to remove the first holder from the paper roll shaft for paper roll replacement, which is convenient and quick to operate. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 is a three-dimensional exploded view of the printer paper roll holder provided in Embodiment 1 of this utility model;

[0017] Figure 2 is a cross-sectional view of the printer roll holder provided in Embodiment 1 of this utility model;

[0018] Figure 3 is a three-dimensional exploded view of the printer paper roll holder provided in Embodiment 2 of this utility model;

[0019] Figure 4 is a cross-sectional view of the printer roll holder provided in Embodiment 2 of this utility model.

[0020] Explanation of reference numerals in the attached diagram: Paper roll 1, First limiting structure 11, First vertical section 111, First limiting section 112, First locking structure 12, Support ring platform 13, First positioning structure 131, Tightening rib 14, First bracket 2, Second limiting structure 21, Second vertical section 211, Second limiting section 212, Second locking structure 22, Second bracket 3, Second positioning structure 31. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model. Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of this disclosure, unless otherwise stated, "a plurality of" means two or more.

[0022] Example 1

[0023] Referring to Figures 1 and 2, a printer paper roll holder includes a paper roll shaft 1 and a first bracket 2. The paper roll shaft 1 has a first end, on which a first limiting structure 11 is provided. The first limiting structure 11 is provided with a first locking structure 12. There may be multiple first limiting structures 11, which are evenly distributed circumferentially on the side of the first end. In this embodiment, two first limiting structures 11 are provided on the first end. The first bracket 2 is provided with a second limiting structure 21, the number and position of which correspond to the first limiting structures 11. The second limiting structure 21 is provided with a second locking structure 22. In use, the printing paper roll can first be placed onto the paper roll shaft 1, and then the first bracket 2 can be fixedly installed on the first end of the paper roll shaft 1 to prevent the printing paper roll from falling off the paper roll shaft 1. Specifically, the user places the first bracket 2 onto the first end of the paper roll shaft 1 and drives the first bracket 2 to rotate relative to the paper roll shaft 1 until the second limiting structure 21 cooperates with the first limiting structure 11. The cooperation of the first limiting structure 11 and the second limiting structure 21 restricts the degree of freedom of the first bracket 2 to move axially. The first bracket 2 continues to rotate relative to the paper roll shaft 1 until the second locking structure 22 cooperates with the first locking structure 12. When the first locking structure 12 and the second locking structure 22 are in the correct position, the first locking structure 12 and the second locking structure 22 cooperate to constrain the degree of freedom of the first support 2 to rotate axially, thus ensuring that the first support 2 is fixedly connected to the paper roll 1. When the printing paper roll needs to be replaced, the user can drive the first support 2 to rotate in the opposite direction relative to the paper roll 1 so that the second locking structure 22 is disengaged from the first locking structure 12. Then, the user can continue to drive the first support 2 to rotate in the opposite direction relative to the paper roll 1 until the second limiting structure 21 is disengaged from the first limiting structure 11. The user can then separate the first support 2 from the paper roll 1, and the printing paper roll can be installed on the paper roll 1 from the first end.

[0024] In some possible embodiments, the paper roll 1 is sleeve-shaped. The first limiting structure 11 includes a first vertical segment 111 extending outward from the first end along the axial direction, and a first limiting segment 112 extending horizontally towards the axis. The first limiting segment 112 gradually protrudes inward from the first vertical segment 111 from its starting end. The second limiting structure 21 is an arc-shaped hole formed on the first support 2. The opening size and opening shape of one end of the arc-shaped hole are adapted to the first limiting segment 112 to ensure that the first limiting segment 112 can pass through the first support 2. When the user drives the first support 2 to rotate relative to the paper roll 1, the first vertical segment 111 can rotate with the first support 2 in the arc-shaped hole until the first limiting segment 112 covers the outside of the first support 2. Therefore, when the first support 2 moves back and forth along the axial direction, it will be blocked by the end of the paper roll 1 and the first limiting segment 112, thereby realizing the cooperation between the first limiting structure 11 and the second limiting structure 21 to constrain the degree of freedom of the first support 2 to move along the axial direction.

[0025] In some possible embodiments, the first locking structure 12 is a groove formed in the middle of the first vertical segment 111, and the second locking structure 22 is located on the outer side of the first bracket 2. The second locking structure 22 is arranged horizontally outward so that it can be engaged in the groove. The working surface of the second locking structure 22 is in the shape of a protruding arc. When the second locking structure 22 rotates with the first bracket 2, it will be squeezed by the first limiting structure 11, resulting in a slight elastic deformation between the two. This allows the second locking structure 22 to continue rotating with the first bracket 2 to the first locking structure 12. At this time, the protruding arc-shaped second locking structure 22 can be engaged in the groove-shaped first locking structure 12. During use, the force exerted on the first bracket 2 / paper roll 1 by printer vibration is unlikely to cause the second locking structure 22 and the first limiting structure 11 to be squeezed and deformed, thereby ensuring that the first bracket 2 will not separate from the paper roll 1 during use and ensuring the reliability of the paper roll bracket.

[0026] Example 2

[0027] This embodiment provides another design concept for the first limiting structure 11 and the second limiting structure 21. Referring to Figures 3 and 4, the paper roll 1 is sleeve-shaped. The first limiting structure 11 is formed on the inner wall of the paper roll 1. Specifically, the first limiting structure 11 is a protrusion on the inner wall of the paper roll 1, and the first limiting structure 11 gradually protrudes from its starting end from the inner wall of the paper roll 1. The second limiting structure 21 is a limiting groove protruding axially from the inner side of the first support 2. The opening side of the limiting groove is horizontally set. When the user puts the first support 2 on the first end and drives the first support 2 to rotate relative to the paper roll 1, the second limiting structure 21 can rotate with the first support 2 and the protruding first limiting structure 11 gradually enters the second limiting structure 21 from the opening side. Therefore, when the first support 2 moves back and forth axially, the first limiting structure 11 will be blocked by the limiting groove-shaped second limiting structure 21, thereby realizing the cooperation between the first limiting structure 11 and the second limiting structure 21 to constrain the degree of freedom of the first support 2 to move axially.

[0028] In some possible embodiments, the first locking structure 12 is a groove provided in the middle of the first limiting structure 11, and the second locking structure 22 is a pin protruding axially from the inner wall of the limiting groove. When the pin rotates with the first bracket 2, it will be squeezed by the first limiting structure 11, resulting in a slight elastic deformation between the two, so that the pin can continue to rotate with the first bracket 2 to the first locking structure 12, at which time the pin can be locked in the groove. During use, the force exerted on the first bracket 2 / paper roll 1 by the printer's vibration is unlikely to cause the pin to be squeezed and deformed by the first limiting structure 11, thereby ensuring that the first bracket 2 will not separate from the paper roll 1 during use and ensuring the reliability of the paper roll bracket.

[0029] In some possible embodiments, the second limiting structure 21 includes a second vertical segment 211 protruding axially from the inner side of the first support 2 and a second limiting segment 212 extending horizontally outward from one end of the second vertical segment 211. The horizontal extension length of the second limiting segment 212 is adapted to the length of the first limiting structure 11 protruding from the inner wall of the paper roll 1. The distance between the second limiting segment 212 and the first support 2 is adapted to the height dimension of the first limiting structure 11, so that the first limiting structure 11 can be smoothly inserted into the limiting groove formed by the second limiting segment 212 and the inner side of the first support 2, thereby restricting the first straight line from swaying axially relative to the paper roll 1.

[0030] In some possible embodiments, the printer paper roll holder of this application further includes a second bracket 3. The paper roll shaft 1 also has a second end, on which a support ring platform 13 is provided. The maximum outer diameter of the support ring platform 13 is larger than the outer diameter of the paper roll shaft 1. The second bracket 3 is sleeved onto the paper roll shaft 1 from the first end and finally overlapped and fixed on the support ring platform 13. Then, the printing paper roll is loaded onto the paper roll shaft 1, and finally the first bracket 2 is installed at the first end, thereby completing the assembly of the printer paper roll holder. The printing paper roll is located between the first bracket 2 and the second bracket 3, realizing reliable and stable feeding.

[0031] In some possible embodiments, at least one first positioning structure 131 is provided on the support ring 13, and at least one second positioning structure 31 is provided on the second bracket 3. The first positioning structure 131 and the second positioning structure 31 can be correspondingly provided positioning holes / positioning pins. The outer wall of the paper roll 1 at the second end is provided with gradually protruding ribs 14. During installation, the closer the second bracket 3 is to the second end, the greater the force between it and the ribs 14, thereby fixing the second bracket 3 to the second end of the paper roll 1.

[0032] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A printer paper roll holder, characterized in that, include: A paper roll (1) has a first end, on which a first limiting structure (11) is provided, and on which a first locking structure (12) is provided; a first bracket (2) has a second limiting structure (21) provided, and on which a second locking structure (22) is provided; wherein, the first bracket (2) is sleeved on the first end, and the first bracket (2) rotates relative to the paper roll (1) until the second limiting structure (21) cooperates with the first limiting structure (11) to constrain the axial movement freedom of the first bracket (2), and the second locking structure (22) cooperates with the first locking structure (12) to constrain the axial rotation freedom of the first bracket (2).

2. A printer paper roll holder according to claim 1, characterized in that, The paper roll (1) is sleeve-shaped. The first limiting structure (11) includes a first vertical segment (111) extending outward from the first end along the axial direction and a first limiting segment (112) extending horizontally towards the axis from one end of the first vertical segment (111). The first limiting segment (112) gradually protrudes inward from the first vertical segment (111) from its starting end. The second limiting structure (21) is an arc-shaped hole formed on the first support (2). The opening shape at one end of the arc-shaped hole is adapted to the first limiting segment (112). When the first support (2) is sleeved on the first end, the first limiting segment (112) can pass through one end of the arc-shaped hole. The first limiting segment (112) rotates with the first support (2) relative to the paper roll (1) to the outside of the first support (2).

3. A printer paper roll holder according to claim 2, characterized in that, The first locking structure (12) is a groove formed in the middle of the first vertical section (111), and the second locking structure (22) is located on the outer side of the first bracket (2) and is arranged horizontally outward. The working surface of the second locking structure (22) is a protruding arc shape.

4. A printer paper roll holder according to claim 1, characterized in that, The paper roll (1) is sleeve-shaped. The first limiting structure (11) is formed on the inner wall of the paper roll (1). The first limiting structure (11) gradually protrudes from the inner wall of the paper roll (1) from its starting end. The second limiting structure (21) is a limiting groove that protrudes axially from the inner side of the first bracket (2). The opening side of the limiting groove is horizontally arranged. When the first bracket (2) is sleeved on the first end and rotates relative to the paper roll (1), the second limiting structure (21) rotates with the first bracket (2) and gradually sleeves on the first limiting structure (11).

5. A printer paper roll holder according to claim 4, characterized in that, The first locking structure (12) is a groove provided in the middle of the first limiting structure (11), and the second locking structure (22) is a pin protruding axially from the inner wall of the limiting groove.

6. A printer paper roll holder according to claim 5, characterized in that, The second limiting structure (21) includes a second vertical section (211) protruding axially from the inner side of the first bracket (2) and a second limiting section (212) extending horizontally outward from one end of the second vertical section (211). The horizontal extension length of the second limiting section (212) is adapted to the length of the first limiting structure (11) protruding from the inner wall of the paper roll (1). The distance between the second limiting section (212) and the first bracket (2) is adapted to the height dimension of the first limiting structure (11).

7. A printer paper roll holder according to claim 1, characterized in that, It also includes a second bracket (3), and the paper roll (1) also has a second end, on which a support ring platform (13) is provided. The second bracket (3) can be sleeved onto the paper roll (1) from the first end and fixed on the support ring platform (13).

8. A printer paper roll holder according to claim 7, characterized in that, At least one first positioning structure (131) is provided on the support ring platform (13), and at least one second positioning structure (31) is provided on the second bracket (3). A gradually protruding rib (14) is provided on the outer wall of the second end of the paper roll (1). The second bracket (3) is fitted into the second end and gradually presses against the rib (14).

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