Printer paper bin structure and printer

Abstract

The utility model relates to the technical field of printers, in particular to a printer paper bin structure and a printer, the printer paper bin structure comprises a paper bin and a limiting assembly, the paper bin comprises a bottom plate and two limiting protrusions arranged on the bottom plate at intervals in the width direction of the bottom plate, and a paper containing space is defined by the bottom plate and the two limiting protrusions. The two limiting protrusions are attached to the two side edges of first paper in the paper containing space correspondingly. The limiting assembly is arranged on the bottom plate and located at the end, away from the paper twisting roller, of the bottom plate in the length direction of the bottom plate, the limiting assembly comprises two limiting plates, the two limiting plates have the first position and the second position, the two limiting plates are attached to the two side edges of second paper in the width direction in the first position, and the two limiting plates are attached to the two side edges of the second paper in the width direction in the second position. The two limiting plates are located at the end, away from the paper rubbing roller, of the first paper in the length direction. The printer paper bin structure can limit the ends, away from the paper rubbing roller, of the two kinds of paper respectively, and the problems of paper deviation, printing deviation or paper jam are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a printer paper bin structure and a printer. Background Art

[0002] As an output device that converts electronic documents into paper documents, a printer can convert the presentation form of the document, providing convenience for people to read paper documents. It is a commonly used device for office workers to print documents.

[0003] When a printer is in use, it uses a paper feeder to transport paper through a pickup roller into the printer, converting digital files into paper. When printing office documents, it's often necessary to adapt to different paper sizes and types. In addition to adjusting the paper width, it's also necessary to set paper limits to ensure that the paper doesn't skew during subsequent feeding and feeding, ensuring that the print is not skewed.

[0004] However, the existing paper bin width limit is generally set at the front end of the paper bin (that is, the end close to the paper pickup roller), and the tail end of the paper will lack a limit. For example, when adjusting and switching between A4 paper and letter paper, the size of A4 paper is 210mm*297mm, and the size of letter paper is: 216mm*279mm: Because of the difference in length and width between the two types of paper, during the design, in order to ensure that letter paper and A4 paper can be placed at the same time, the width of the paper bin must be designed according to the width of letter paper. This will result in the limit gap at the tail end of the A4 paper being too large when printing with A4 paper, causing the paper to easily go awry when picking up the paper, which in turn causes skewed printing or paper jams.

[0005] Therefore, a printer paper bin structure is urgently needed to solve the above problems. Utility Model Content

[0006] The purpose of the present utility model is to provide a printer paper bin structure and a printer, so as to solve the problem in the related art that the paper bin is only provided with a limiting structure for limiting the printing paper near the paper pickup roller, which results in the printing paper away from the paper pickup roller having no limit, causing the paper to easily go awry when the paper pickup roller picks up the paper, thereby causing skewed printing or paper jams.

[0007] In one aspect, the present invention provides a printer paper bin structure, which includes:

[0008] The paper bin includes a bottom plate and two limiting protrusions spaced apart on the bottom plate along the width direction of the bottom plate, wherein the bottom plate and the two limiting protrusions enclose a paper receiving space, and the two limiting protrusions are adapted to respectively fit with two side edges of a first paper placed in the paper receiving space;

[0009] A limiting assembly is provided on the bottom plate and located at one end away from the pickup roller along the length direction of the bottom plate. The limiting assembly includes two limiting plates. The two limiting plates have a first position and a second position. In the first position, the two limiting plates are suitable for respectively fitting with the two side edges of the second paper placed in the paper holding space along the width direction. In the second position, the two limiting plates are located at one end of the first paper along the length direction away from the pickup roller.

[0010] As a preferred technical solution for the printer paper bin structure, in the first position, the two limiting protrusions are respectively fitted with the two limiting plates on two opposite side walls along the width direction.

[0011] As a preferred technical solution for the printer paper bin structure, located at the second position, the two limit plates are respectively used to fit with one end of the first paper away from the pickup roller along the length direction.

[0012] As an optimal technical solution for the printer paper bin structure, the limit assembly also includes two rotating shafts, which are rotatably arranged on the paper bin, and the axes of the rotating shafts are perpendicular to the base plate. The limit plate can be driven around the rotating shafts to switch between the first position and the second position.

[0013] As a preferred technical solution for the printer paper bin structure, the two limiting protrusions are respectively provided with avoidance grooves along the width direction, and the notches of the two avoidance grooves are arranged opposite to each other;

[0014] The limiting assembly also includes two connecting plates, the two rotating shafts are respectively located in the two avoidance grooves, one end of the two connecting plates are respectively fixed to the peripheral walls of the two rotating shafts, and the other end of the two connecting plates are respectively fixed to the two limiting plates, the limiting plate is located in the first position, and the other end of the connecting plate is located outside the avoidance groove.

[0015] As a preferred technical solution for the printer paper bin structure, in the plane where the base plate is located, the projection of the connecting plate and the projection of the limiting plate are perpendicular to each other.

[0016] As an optimal technical solution for the printer paper bin structure, the limiting assembly also includes two hinged plates, which are respectively arranged in the two avoidance grooves, one end of the two hinged plates are respectively fixed to the groove walls of the two avoidance grooves, and two hinge holes are respectively provided on the two hinged plates, and the two rotating shafts are respectively inserted in the two hinge holes.

[0017] As a preferred technical solution for the printer paper bin structure, the other end of the hinge plate is provided with a through groove, which is connected to the hinge hole;

[0018] The wall of the hinge hole is provided with a locking protrusion, and the peripheral wall of the rotating shaft is provided with a first locking groove and a second locking groove at intervals around the axis of the rotating shaft. The rotating shaft rotates so that the locking protrusion can be located in the first locking groove or the second locking groove. When the locking protrusion is located in the first locking groove, the limiting plate is located in the first position, and when the locking protrusion is located in the second locking groove, the limiting plate is located in the second position.

[0019] As a preferred technical solution for the printer paper bin structure, the other end of the hinge plate is provided with a through groove, which is connected to the hinge hole;

[0020] The hole wall of the hinge hole is recessed with a first clamping groove and a second clamping groove at intervals around the axis of the hinge hole, and a clamping protrusion is convexly provided on the peripheral wall of the rotating shaft. The rotating shaft rotates so that the clamping protrusion can be located in the first clamping groove or the second clamping groove. When the clamping protrusion is located in the first clamping groove, the limit plate is located in the first position, and when the clamping protrusion is located in the second clamping groove, the limit plate is located in the second position.

[0021] On the other hand, the present invention provides a printer, comprising a pickup roller and the printer paper bin structure of any of the above schemes, wherein the pickup roller is arranged at one end of the bottom plate along the length direction of the bottom plate.

[0022] The beneficial effects of the utility model are:

[0023] The utility model provides a printer paper bin structure and a printer. The printer paper bin structure includes a paper bin and a limiting assembly. The paper bin includes a bottom plate and two limiting protrusions arranged on the bottom plate at intervals along the width direction of the bottom plate. The bottom plate and the two limiting protrusions are arranged to form a paper storage space. The two limiting protrusions are suitable for respectively fitting with two side edges of a first paper placed in the paper storage space. The limiting assembly is arranged on the bottom plate and is located at one end away from a paper pickup roller along the length direction of the bottom plate. The limiting assembly includes two limiting plates. The two limiting plates have a first position and a second position. In the first position, the two limiting plates are suitable for respectively fitting with two side edges of a second paper placed in the paper storage space along the width direction. In the second position, the two limiting plates are located at one end of the first paper away from the paper pickup roller along the length direction. When the printer is in operation, when the first paper is used, the two limiting plates are switched to the second position. At this time, the first paper is directly placed in the paper receiving space. Since the two limiting protrusions are in contact with the two side walls of the first paper in the width direction, the two limiting protrusions can limit the end of the first paper away from the pickup roller, thereby preventing the first paper from going astray, thereby preventing problems such as skewed printing or paper jams. When the second paper needs to be printed, since the second paper is smaller than the first paper in the width direction, when the second paper is placed in the paper receiving space, the two limiting protrusions are spaced apart from the two side walls of the second paper in the width direction. Therefore, the two limiting protrusions cannot limit the end of the second paper away from the pickup roller. Therefore, the two limiting plates are switched to the first position. At this time, the two limiting plates are respectively in contact with the two side edges of the second paper set in the paper receiving space in the width direction, thereby limiting the end of the second paper away from the pickup roller, thereby preventing the second paper from going astray, thereby preventing problems such as skewed printing or paper jams. In summary, the printer paper bin structure can limit the end of two sizes of paper away from the pickup roller, thereby preventing the second paper from going astray and avoiding problems such as skewed printing or paper jams. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Schematic diagram of the structure of the paper bin of the printer in the first embodiment of the present invention (the limit plate is in the second position);

[0025] Figure 2 for Figure 1 A partial enlarged view of point A in the middle;

[0026] Figure 3 This is a second structural diagram of the paper bin structure of the printer in the first embodiment of the present invention (the limit plate is located in the second position);

[0027] Figure 4 for Figure 3 A partial enlarged view of point B in the middle;

[0028] Figure 5This is a structural diagram of the paper bin structure of the printer in the first embodiment of the present utility model (the limit plate is in the first position);

[0029] Figure 6 for Figure 5 A partial enlarged view of point C in the middle.

[0030] In the picture:

[0031] X, length direction; Y, width direction;

[0032] 100, first paper; 200, second paper;

[0033] 1. Paper bin; 11. Bottom plate; 12. Limiting protrusion; 121. Avoidance groove;

[0034] 21. Limiting plate; 22. Rotating shaft; 221. First slot; 222. Second slot; 23. Connecting plate; 24. Hinge plate; 241. Hinge hole; 242. Through slot; 243. Boss; 25. Limiting slider. DETAILED DESCRIPTION

[0035] The following is a clear and complete description of the technical solution of the present invention in conjunction with the accompanying drawings. Obviously, the embodiments described are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0036] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a specific position, be constructed and operated in a specific position, and therefore should not be understood as limiting the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions, and the first feature being "above", "above" and "above" the second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is at a higher level than the second feature. The first feature being "below", "below" and "below" the second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0037] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0038] The following describes embodiments of the present invention in detail. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended only to explain the present invention and are not to be construed as limiting the present invention.

[0039] like Figures 1 to 6As shown, this embodiment provides a printer paper storage structure, which includes a paper storage 1 and a limiting assembly. The paper storage 1 includes a base plate 11 and two limiting protrusions 12 spaced apart along the width direction Y of the base plate 11. The base plate 11 and the two limiting protrusions 12 enclose a paper receiving space, and the two limiting protrusions 12 are adapted to respectively adhere to the two side edges of a first paper 100 placed in the paper receiving space. The limiting assembly is disposed on the base plate 11 and is located at an end of the base plate 11 along the length direction X away from the pickup roller. The limiting assembly includes two limiting plates 21. The two limiting plates 21 have a first position and a second position. In the first position, the two limiting plates 21 are adapted to respectively adhere to the two side edges of a second paper 200 placed in the paper receiving space along the width direction Y. In the second position, the two limiting plates 21 are located at the end of the first paper 100 along the length direction X away from the pickup roller. It should be noted that the term "adherence" as used in this application refers to a very small distance between two objects, for example, a distance ranging from 0 to 2 mm. When the printer is working, when the first paper 100 is used, the two limiting plates 21 are switched to the second position. At this time, the first paper 100 is placed in the paper receiving space. Since the two limiting protrusions 12 are in contact with the two side walls of the first paper 100 along the width direction Y, the two limiting protrusions 12 can limit the end of the first paper 100 away from the pickup roller, thereby preventing the first paper 100 from going astray and avoiding problems such as skewed printing or paper jams. When the second paper 200 needs to be used for printing, since the second paper 200 is smaller than the first paper 100 in the width direction Y, when the second paper 200 is placed in the paper storage space, the two limiting protrusions 12 are spaced apart from the two side walls of the second paper 200 in the width direction Y. Therefore, the two limiting protrusions 12 cannot limit the end of the second paper 200 away from the pickup roller. Therefore, the two limiting plates 21 are switched to the first position. At this time, the two limiting plates 21 are respectively attached to the two side edges of the second paper 200 set in the paper storage space in the width direction Y, thereby limiting the end of the second paper 200 away from the pickup roller, thereby preventing the second paper 200 from going astray, and avoiding problems such as skewed printing or paper jams. In summary, the printer paper bin structure can limit the end of two sizes of paper away from the pickup roller, thereby preventing the second paper 200 from going astray, and avoiding problems such as skewed printing or paper jams.

[0040] Optionally, in the first position, the two opposing side walls of the two limiting protrusions 12 along the width direction Y are respectively in contact with the two limiting plates 21. In this embodiment, when the two limiting plates 21 are in the first position, the second paper 200 moves between the two limiting plates 21 along the length direction X of the bottom plate 11. At this time, the second paper 200 exerts a force on the two limiting plates 21 along the width direction Y. Since the two opposing side walls of the two limiting protrusions 12 along the width direction Y are respectively in contact with the two limiting plates 21, the two limiting protrusions 12 apply a force to the two limiting plates 21 along the width direction Y in a one-to-one manner, thereby preventing the second paper 200 from causing the two limiting plates 21 to move away from each other, thereby preventing the two limiting plates 21 from failing to limit the second paper 200. In other embodiments, the two limiting plates 21 may also be spaced apart from the two limiting protrusions 12.

[0041] Optionally, in the second position, the two limiting plates 21 are respectively configured to abut against the end of the first paper 100 away from the pickup roller along the length direction X. In this embodiment, when the printer is printing on the first paper 100, the two limiting plates 21 are in the second position. At this time, the two limiting plates 21 are respectively configured to abut against the end of the first paper 100 away from the pickup roller along the length direction X, thereby limiting the position of the first paper 100 along the length direction X and preventing the first paper 100 from moving away from the pickup roller along the length direction X.

[0042] Optionally, the limiting assembly further includes a limiting slider 25, which is disposed on the bottom plate 11 at an end away from the pickup roller. The limiting slider 25 has two states with respect to the bottom plate 11 along the longitudinal direction X: a relative sliding state and a relative fixed state. When the first paper 100 is disposed in the limiting channel, the limiting slider 25 can be brought into contact with the end of the first paper 100 away from the pickup roller along the longitudinal direction X. In this case, the limiting slider 25 and the two limiting plates 21 jointly limit the position of the first paper 100 along the longitudinal direction X. When a second paper 200 is disposed in the paper receiving space, the two limiting plates 21 are in the first position. In this case, the limiting slider 25 can only be brought into contact with the end of the second paper 200 away from the pickup roller along the longitudinal direction X to limit the position of the second paper 200 along the longitudinal direction X.

[0043] Optionally, the limiting assembly further includes two rotating shafts 22, which are rotatably mounted on the paper bin 1, with the axes of the rotating shafts 22 being perpendicular to the bottom plate 11. The limiting plate 21 can be driven about the rotating shafts 22 to switch between the first position and the second position. In this embodiment, as the rotating shafts 22 rotate, the limiting plate 21 swings about the axes of the rotating shafts 22, thereby switching between the first position and the second position.

[0044] Optionally, the two limiting protrusions 12 are respectively provided with avoidance grooves 121 along the width direction Y, with the notches of the two avoidance grooves 121 arranged opposite to each other; the limiting assembly further includes two connecting plates 23, the two rotating shafts 22 are respectively located in the two avoidance grooves 121, one end of the two connecting plates 23 is respectively fixedly connected to the peripheral walls of the two rotating shafts 22, and the other ends of the two connecting plates 23 are respectively fixedly connected to the two limiting plates 21, when the limiting plates 21 are in the first position, the other ends of the connecting plates 23 are located outside the avoidance grooves 121. Optionally, in the plane where the bottom plate 11 is located, the projection of the connecting plates 23 and the projection of the limiting plates 21 are perpendicular to each other. In this embodiment, in order to prevent the rotating shaft 22 from affecting the placement of the second paper 200 in the paper storage space, avoidance grooves 121 are respectively provided on the two limiting protrusions 12 along the width direction Y. The two rotating shafts 22 are respectively placed in the two avoidance grooves 121. One end of the two connecting plates 23 is respectively fixed to the two rotating shafts 22, and the other ends of the two connecting plates 23 are respectively fixed to the two limiting plates 21. The two connecting plates 23 are respectively perpendicular to the corresponding two limiting plates 21. When the two limiting plates 21 are in the first position, the other ends of the connecting plates 23 are located outside the avoidance grooves 121 and extend along the width direction Y. At this time, the two limiting plates 21 are respectively in contact with the two limiting protrusions 12. When the two limiting plates 21 are in the second position, the two limiting plates 21 extend respectively along the width direction Y and the two limiting plates 21 extend respectively along the length direction X.

[0045] Optionally, the limiting assembly further includes two hinged plates 24, each disposed within the two avoidance slots 121. One end of each hinged plate 24 is fixedly connected to the walls of the two avoidance slots 121. Each hinged plate 24 is provided with two hinge holes 241, into which each of the two rotating shafts 22 is inserted. In this embodiment, the rotating shafts 22 are inserted into the corresponding hinge holes 241, thereby enabling the rotating shafts 22 to rotate about their own axes.

[0046] Optionally, the other end of the hinge plate 24 is recessed with a through-slot 242 that communicates with the hinge hole 241. A latching protrusion 243 is protruded from the wall of the hinge hole 241. A first latching slot 221 and a second latching slot 222 are recessed on the peripheral wall of the rotating shaft 22 at intervals around the axis of the rotating shaft 22. The rotating shaft 22 rotates so that the latching protrusion 243 can be positioned within either the first latching slot 221 or the second latching slot 222. When the latching protrusion 243 is positioned in the first latching slot 221, the limiting plate 21 is in the first position. When the latching protrusion 243 is positioned in the second latching slot 222, the limiting plate 21 is in the second position. In this embodiment, the through-slot 242 on the hinge plate 24 allows the hinge plate 24 to slightly deform when an external force is applied to the inner wall of the hinge hole 241. Therefore, when the rotating shaft 22 rotates to switch the locking protrusion 243 between the first locking slot 221 and the second locking slot 222, the hinge plate 24 can undergo elastic deformation. When the locking protrusion 243 is located in the first locking slot 221 or the second locking slot 222, the hinge plate 24 returns to its original state, thereby fixing the limit plate 21 in the first position or the second position.

[0047] On the other hand, this embodiment further provides a printer, including a pickup roller and the printer paper bin structure of the above solution, wherein the pickup roller is arranged at one end of the bottom plate 11 along the length direction X of the bottom plate 11 .

[0048] Example 2

[0049] This embodiment is substantially the same as the first embodiment, except that the wall of the hinge hole 241 is recessed with a first engaging groove 221 and a second engaging groove 222 at intervals around the axis of the hinge hole 241, and a protrusion 243 is convexly formed on the peripheral wall of the rotating shaft 22. The rotating shaft 22 rotates so that the protrusion 243 can be positioned within either the first engaging groove 221 or the second engaging groove 222. When the protrusion 243 is positioned in the first engaging groove 221, the limiting plate 21 is in the first position; when the protrusion 243 is positioned in the second engaging groove 222, the limiting plate 21 is in the second position. In this embodiment, the through-slot 242 is provided on the hinge plate 24 to allow the hinge plate 24 to slightly deform when an external force is applied to the inner wall of the hinge hole 241. Therefore, when the rotating shaft 22 rotates to switch the locking protrusion 243 between the first locking slot 221 and the second locking slot 222, the hinge plate 24 can undergo elastic deformation. When the locking protrusion 243 is located in the first locking slot 221 or the second locking slot 222, the hinge plate 24 returns to its original state, thereby fixing the limit plate 21 in the first position or the second position.

[0050] Obviously, the above embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention, and are not intended to limit the implementation methods of the present invention. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. The printer paper bin structure is characterized by: include: A paper bin (1) comprises a bottom plate (11) and two limiting protrusions (12) arranged on the bottom plate (11) at intervals along a width direction (Y) of the bottom plate (11), wherein the bottom plate (11) and the two limiting protrusions (12) enclose a paper storage space, and the two limiting protrusions (12) are adapted to respectively fit with two side edges of a first paper (100) placed in the paper storage space; A limiting component is provided on the bottom plate (11) and is located at one end away from the pickup roller along the length direction (X) of the bottom plate (11), the limiting component includes two limiting plates (21), the two limiting plates (21) have a first position and a second position, in the first position, the two limiting plates (21) are suitable for respectively fitting with the two side edges of the second paper (200) placed in the paper holding space along the width direction (Y), and in the second position, the two limiting plates (21) are located at one end of the first paper (100) along the length direction (X) away from the pickup roller.

2. The printer paper bin structure according to claim 1, characterized in that: At the first position, the two limiting protrusions (12) are respectively fitted with the two limiting plates (21) along two opposite side walls in the width direction (Y).

3. The printer paper bin structure according to claim 1, characterized in that: At the second position, the two limiting plates (21) are respectively used to fit with one end of the first paper (100) away from the pickup roller along the length direction (X).

4. The printer paper bin structure according to claim 1, characterized in that: The limiting assembly further comprises two rotating shafts (22), the rotating shafts (22) being rotatably arranged on the paper bin (1), and the axes of the rotating shafts (22) being perpendicular to the bottom plate (11), and the limiting plate (21) being driven around the rotating shafts (22) to switch between the first position and the second position.

5. The printer paper bin structure according to claim 4, characterized in that: The two limiting protrusions (12) are respectively provided with avoidance grooves (121) along the width direction (Y), and the notches of the two avoidance grooves (121) are arranged opposite to each other; The limiting assembly further comprises two connecting plates (23), the two rotating shafts (22) are respectively located in the two avoiding grooves (121), one end of the two connecting plates (23) is respectively fixedly connected to the peripheral walls of the two rotating shafts (22), and the other end of the two connecting plates (23) is respectively fixedly connected to the two limiting plates (21), the limiting plates (21) are located in the first position, and the other end of the connecting plate (23) is located outside the avoiding groove (121).

6. The printer paper bin structure according to claim 5, characterized in that: In the plane where the bottom plate (11) is located, the projection of the connecting plate (23) and the projection of the limiting plate (21) are perpendicular to each other.

7. The printer paper bin structure according to claim 5, characterized in that: The limiting assembly further comprises two hinged plates (24), the two hinged plates (24) being respectively arranged in the two avoidance grooves (121), one end of the two hinged plates (24) being respectively fixed to the groove walls of the two avoidance grooves (121), the two hinged plates (24) being respectively provided with two hinged holes (241), and the two rotating shafts (22) being respectively inserted in the two hinged holes (241).

8. The printer paper bin structure according to claim 7, characterized in that: The other end of the hinge plate (24) is concavely provided with a through groove (242), and the through groove (242) is communicated with the hinge hole (241); The wall of the hinge hole (241) is provided with a locking protrusion (243); the peripheral wall of the rotating shaft (22) is provided with a first locking groove (221) and a second locking groove (222) at intervals around the axis of the rotating shaft (22); the rotating shaft (22) rotates so that the locking protrusion (243) can be located in the first locking groove (221) or the second locking groove (222); the locking protrusion (243) is located in the first locking groove (221), the limiting plate (21) is located in the first position, the locking protrusion (243) is located in the second locking groove (222), and the limiting plate (21) is located in the second position.

9. The printer paper bin structure according to claim 7, characterized in that: The other end of the hinge plate (24) is concavely provided with a through groove (242), and the through groove (242) is communicated with the hinge hole (241); The wall of the hinge hole (241) is provided with a first clamping groove (221) and a second clamping groove (222) at intervals around the axis of the hinge hole (241); a clamping protrusion (243) is provided on the peripheral wall of the rotating shaft (22); the rotating shaft (22) rotates so that the clamping protrusion (243) can be located in the first clamping groove (221) or the second clamping groove (222); the clamping protrusion (243) is located in the first clamping groove (221), the limiting plate (21) is located in the first position, the clamping protrusion (243) is located in the second clamping groove (222), and the limiting plate (21) is located in the second position.

10. A printer, characterized in that The printer paper bin structure comprises a pickup roller and any one of claims 1 to 9, wherein the pickup roller is arranged at one end of the bottom plate (11) along the length direction (X) of the bottom plate (11).

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