Toilet paper box

Abstract

The present invention relates to a paper roll box, comprising a box body, a door body, and a paper feed assembly. The box body includes a back plate, which is fixed to a supporting body to support the paper roll box. A first opening is provided on a side of the box body perpendicular to the back plate. The door body blocks the first opening. One end of the door body is hinged to the box body via a hinge device. The door body is locked to the box body via a first locking mechanism. The paper feed assembly includes a first transmission shaft and a second transmission shaft. The first transmission shaft is provided on the door body, and the second transmission shaft is provided in the box body. The central axis of the first transmission shaft and the central axis of the second transmission shaft are spaced apart in the vertical direction. The paper roll box can open the door body from the side, and a paper roll can be directly clamped onto a paper shaft in the paper roll box from the side without removing the paper shaft, thereby facilitating paper roll replacement. Moreover, by spacing the central axis of the first transmission shaft and the central axis of the second transmission shaft in the vertical direction, the paper roll box has a paper jam prevention function during paper feeding.

Description

Technical Field

[0001] The present invention relates to the field of mechanical technology, in particular to a paper roll box. Background Art

[0002] Tissues are essential for people when traveling, but in real life, most people will suddenly realize that they forgot to bring tissues when they are about to use them. For this reason, paper rolls are usually placed in many places, such as restaurants, toilets, and hospitals. These places have a large flow of people, and the paper rolls placed can bring great convenience to travelers. At present, paper roll boxes usually use smart paper feeding, which not only improves the user experience but also avoids paper waste. However, smart paper feeding is usually unmonitored, and the paper roll box is prone to paper jams when discharging paper, resulting in the paper roll box being unable to discharge paper. Moreover, if the management personnel do not notice the paper jam in the paper roll box for a long time, the working parts of the smart paper feeding in the paper roll box may be damaged. In addition, when replacing the paper roll after use, it is necessary to pull the paper roll head through the paper outlet, which is a cumbersome operation. At the same time, when pulling the paper roll, it is easy for the paper roll to move left and right due to uneven force on both sides, resulting in paper jams. Summary of the Invention

[0003] The purpose of the embodiments of the present invention is to provide a roll paper box with a simple structure, the roll paper box cover can be opened from the side to replace the roll paper, and paper jam will not occur.

[0004] To achieve this purpose, the embodiment of the present invention adopts the following technical solutions:

[0005] A paper roll box is provided, comprising a box body, a door body and a paper feeding assembly, the box body comprising a back plate, a first opening being provided on a side of the box body perpendicular to the back plate, the door body being sealed at the first opening, one end of the door body being hinged to the box body through a hinge device, the door body being locked to the box body through a first locking mechanism, the paper feeding assembly comprising a first transmission shaft and a second transmission shaft, the first transmission shaft being arranged on the door body, the second transmission shaft being arranged in the box body, the outer side wall of the first transmission shaft abutting against the outer side wall of the second transmission shaft, and the central axis of the first transmission shaft and the central axis of the second transmission shaft being spaced apart in the vertical direction.

[0006] As a preferred solution for the paper roll box, a paper cutting assembly is also provided below the paper feeding assembly, the paper cutting assembly includes a main knife and a secondary knife spaced apart from the main knife, a paper cutting opening is formed between the main knife and the secondary knife, a paper feeding opening is formed between the first transmission shaft and the second transmission shaft, and the paper cutting opening and the paper feeding opening are spaced apart in the horizontal direction.

[0007] As a preferred solution of the roll paper box, the first transmission shaft includes a first rotating shaft and a first abutting portion, at least two of the first abutting portions are spaced apart and sleeved on the outer wall of the first rotating shaft, and the first abutting portion abuts against the outer wall of the second transmission shaft; or,

[0008] The second transmission shaft includes a second rotating shaft and a second abutting portion. At least two second abutting portions are sleeved on the outer side wall of the second rotating shaft at intervals, and the second abutting portion abuts against the outer side wall of the first transmission shaft.

[0009] As a preferred solution of the paper roll box, the first transmission shaft is a driving shaft, and the second transmission shaft is a driven shaft; or,

[0010] The first transmission shaft is a driven shaft, and the second transmission shaft is a driving shaft.

[0011] As a preferred solution of the paper roll box, the first locking mechanism includes:

[0012] a shaft sleeve, the shaft sleeve being sleeved on the end portion of the first transmission shaft;

[0013] a first locking member rotatably disposed on a side wall of the box body, the first locking member being connected to a movable shaft, the movable shaft being spaced from a rotation center of the first locking member;

[0014] a second locking member, the second locking member being rotatably mounted on a side wall of the box body, the second locking member being engaged with the first locking member, the second locking member being provided with a locking groove for locking the shaft sleeve, the locking groove being spaced from a rotation center of the second locking member, the second locking member being provided with a first spring, the first spring always driving the second locking member to rotate in a direction of engagement with the first locking member;

[0015] a second spring connected to the movable shaft, the second spring always driving the movable shaft to move along a first direction so that the first locking member rotates in a direction of locking with the second locking member;

[0016] A first memory metal wire is connected to the movable shaft and is tautly arranged in the box body. When power is turned on, the first memory metal wire pulls the movable shaft to move in a second direction opposite to the first direction, so that the first locking member and the second locking member are separated, and the second locking member is separated from the sleeve.

[0017] As a preferred solution for the roll paper box, a storage compartment is provided in the box body, a second opening communicating with the storage compartment is provided in the box body, a first battery is provided in the storage compartment, and the first battery is locked in the storage compartment by a second locking mechanism.

[0018] As a preferred solution of the paper roll box, the second locking mechanism includes:

[0019] a locking hook, the locking hook being arranged on an end surface of the first battery away from the second opening;

[0020] a third locking member, the third locking member comprising a lock catch and a first elastic member, the lock catch being rotatably disposed within the box body and located outside an end of the accommodating compartment away from the second opening, the lock catch and the lock hook being mutually engaged to lock the first battery, one end of the lock catch being connected to the first elastic member, and the first elastic member always having a tendency to drive the lock catch to engage the lock hook;

[0021] The second memory metal wire is tautly arranged in the box body, and the second memory metal wire is connected to the lock buckle. When the second memory metal wire is energized, the second memory metal wire contracts and pulls the lock buckle to rotate so that the lock buckle is separated from the lock hook and unlocks the first battery.

[0022] As a preferred solution for the paper roll box, it includes a key, which includes a first shell and a first switch, a second battery and a second functional module arranged in the first shell, the first switch is used to control the power off or on of the second battery and the second functional module, and the box body is also provided with a first functional module, a first magnet and an unlocking component, the first functional module is electrically connected to the unlocking component, the first functional module controls the unlocking component to unlock through an electrical signal, when the first switch is close to the first magnet, the first switch is turned on, and the second functional module can send an unlocking signal to the first functional module.

[0023] As a preferred embodiment of the paper roll box, a paper roll card shaft is provided on the back plate, and the paper roll card shaft includes a second shell, the second shell is provided with a accommodating cavity, a card block and a control member are provided on the second shell, and the control member is rotatably arranged in the accommodating cavity, and the second shell is provided with a first slide slot at intervals, one end of the first slide slot is communicated with the outside of the second shell, and the other end is communicated with the accommodating cavity, and the card block is slidably arranged in the first slide slot, one end of the card block is located in the accommodating cavity and abuts against the control member, and the other end passes through the first slide slot and extends to the outside of the second shell and abuts against the inner wall of the paper roll. The control member has a first position and a second position. When the control member is in the first position, the control member drives the card block to extend to the outside of the second shell, and when the control member is in the second position, the control member drives the card block to retract into the inside of the second shell.

[0024] As a preferred solution of the paper roll box, the control member includes a cam and a reset elastic member, the cam is connected to the reset elastic member, and the reset elastic member drives the control member to be located at the first position.

[0025] As a preferred solution of the paper roll box, the control member further includes a second elastic member, the second elastic member is connected to the cam, and the second elastic member drives the control member to the second position.

[0026] As a preferred solution for the paper roll box, the cam is rotatably arranged in the accommodating cavity, an arc-shaped groove is provided on one side of the second shell, the center of the arc-shaped groove is concentric with the rotation center of the cam, a driving column is protruding from the cam, the suspended end of the driving column passes through the arc-shaped groove and extends to the outside of the second shell, and the outer peripheral wall of the cam abuts against the block.

[0027] As a preferred solution of the paper roll box, the moving direction of the clamping block is always perpendicular to the tangent of the rotation center of the cam.

[0028] As a preferred solution of the paper roll box, a detection device is provided in the box body, and the detection device can detect whether there is paper on the paper roll card shaft.

[0029] As a preferred solution for the paper roll box, a mounting groove is provided on the back plate, the mounting groove is adjacent to the paper roll card shaft, a slider is provided in the mounting groove, the slider protrudes toward the paper roll card shaft and is provided with a third baffle, the side of the slider away from the paper roll card shaft is connected to a third spring, the third spring always drives the third baffle to abut against the first side surface of the paper roll card shaft, and the first side surface is provided with a first protrusion annularly spaced toward the card block.

[0030] As a preferred solution for the paper roll box, the hinge device includes a first connecting part and a second connecting part symmetrically arranged on both sides of the first connecting part in the width direction. A plurality of screw holes are arranged on the door body, and a plurality of openings are arranged on the first connecting part corresponding to the screw holes. The first screw passes through the opening and is screwed into the screw hole to fix the door body and the hinge device in connection.

[0031] As a preferred solution for the paper roll box, at least two gourd holes are provided on the back panel, the paper roll box is set on the supporting body, the supporting body is provided with gourd nails corresponding to the gourd holes, the gourd nails are provided with a fixing hole at one end away from the supporting body, and an elastic hook is provided on a side wall of the back panel away from the supporting body. After the gourd nails are inserted into the gourd holes and stuck in the narrow end of the gourd holes, the elastic hooks are buckled with the fixing holes.

[0032] The beneficial effects of the embodiment of the present invention are as follows: the door body of the paper roll box is arranged on a side perpendicular to the back plate, and the door body can be opened from the side, so that the paper roll can be directly clamped on the paper shaft in the paper roll box from the side without removing the paper shaft, which is simple to operate and convenient for replacing the paper roll. At the same time, after the paper roll is installed, the paper roll head is pulled out a section outside the box body. After closing the door body, the door body and the box body can clamp the paper roll, and there is no need for paper threading operation, which simplifies the paper changing operation and avoids paper jams. The door body can be locked to the box body through a hinge device and a first locking mechanism, which makes it easy to open the door body. In addition, the first transmission shaft and the second transmission shaft are arranged at intervals in the vertical direction, and a paper feed port is formed between the first transmission shaft and the second transmission shaft. The paper roll is subjected to the tilting force between the first transmission shaft and the second transmission shaft at the paper feed port, which prevents the paper roll from being wound on the outer wall of the first transmission shaft or the second transmission shaft, thereby making the paper box have the function of preventing paper jams. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The present invention will be described in further detail below with reference to the accompanying drawings and examples.

[0034] Figure 1 Schematic diagram of the structure of a paper roll box according to an embodiment of the present invention.

[0035] Figure 2 Schematic diagram of an exploded view of a paper roll box according to an embodiment of the present invention.

[0036] Figure 3 This is a first partial schematic diagram of a tissue box according to an embodiment of the present invention.

[0037] Figure 4 for Figure 3 A partial enlarged view of point A.

[0038] Figure 5 This is a second partial schematic diagram of the tissue box according to an embodiment of the present invention.

[0039] Figure 6 for Figure 5 A local enlarged view of point B.

[0040] Figure 7 Schematic diagram of the structure of the first locking mechanism according to an embodiment of the present invention.

[0041] Figure 8 This is a partial enlarged view of point C in the figure.

[0042] Figure 9 Schematic diagram of the connection between the first locking member and the second locking member according to an embodiment of the present invention.

[0043] Figure 10 This is a third partial schematic diagram of the paper roll box according to an embodiment of the present invention.

[0044] Figure 11Schematic diagram of the first battery and the receiving compartment exploded in the first direction according to an embodiment of the present invention.

[0045] Figure 12 Schematic diagram of the first battery and the storage compartment exploded in the second direction according to an embodiment of the present invention.

[0046] Figure 13 Schematic diagram of the structure of the second battery according to an embodiment of the present invention.

[0047] Figure 14 Schematic diagram of the structure of the second body of an embodiment of the present invention.

[0048] Figure 15 This is a fourth partial schematic diagram of the tissue box according to an embodiment of the present invention.

[0049] Figure 16 for Figure 15 A local enlarged view of point D.

[0050] Figure 17 Schematic diagram of the decomposition of the key according to the embodiment of the present invention.

[0051] Figure 18 Schematic diagram of an exploded view of a paper roll clamping shaft according to an embodiment of the present invention.

[0052] Figure 19 2 is a schematic structural diagram of a third shell according to an embodiment of the present invention.

[0053] Figure 20 This is a fifth partial schematic diagram of the tissue box according to an embodiment of the present invention.

[0054] In the picture:

[0055] 1. Box body; 11. Back panel; 111. Mounting slot; 1111. Slider; 1112. Third baffle; 112. Gourd hole; 113. Elastic hook; 12. Storage compartment; 121. First battery; 1211. Third groove; 1212. Sixth slide; 122. First body; 123. Second body; 1231. First avoidance gap; 1232. Third through hole; 1233. Cantilever; 1234. Third boss; 1235. Guide rail; 13. Second opening; 14. First magnet; 15. Second switch; 16. Detection circuit board; 17. Front panel; 171. Second slide; 172. Third slide; 173. Fourth slide; 18. Positioning slot; 2. Door; 21. Second fixing seat; 3. Anti-stuck Paper structure; 31. Paper feeding assembly; 311. First transmission shaft; 312. Second transmission shaft; 32. Paper cutting assembly; 321. Main knife; 322. Second knife; 34. First connecting member; 341. First limiting shaft; 35. Fourth spring; 36. First baffle; 37. Second baffle; 4. Articulated device; 41. First connecting portion; 411. Third opening; 42. Second connecting portion; 421. First boss; 422. Second boss; 5. Movement; 51. First positioning shaft; 52. Second positioning shaft; 53. First limiting plate; 54. Limiting portion; 55. Fifth slide; 56. Second groove; 57. Second avoidance gap; 6. First locking mechanism; 61. Bushing; 62. First locking member; 621. Gear; 622. First positioning hole; 623, third positioning hole; 63, second locking member; 631, locking groove; 632, slot; 633, second positioning hole; 634, guide surface; 64, first spring; 65, driving member; 651, movable shaft; 652, second spring; 653, first memory wire; 654, second connecting member; 6541, second limiting shaft; 66, micro switch; 7, second locking mechanism; 71, third locking member; 711, lock; 7111, first arm; 7112, second arm; 7113, first through hole; 712, first elastic member; 72, second memory wire; 73, lock hook; 731, first groove; 732, second protrusion; 74, ejector assembly; 741, ejector rod; 742, Sixth spring; 8. key; 81. first housing; 811. positioning protrusion; 82. first switch; 83. iron sheet; 84. second functional module; 85. indicator light; 86. second battery; 9. paper roll shaft; 91. second housing; 911. accommodating cavity; 912. first slide groove; 913. arc-shaped groove; 914. third avoidance gap; 915. third housing; 916. fourth housing; 917. fourth mounting hole; 918. fixing column; 919. fourth groove; 92. block; 921. fourth through hole; 93. control member; 931. cam; 932. reset elastic member; 933. second elastic member; 934. first rotating column; 935. second rotating column; 936. driving column; 937. second reinforcing rib;94. Eighth spring; 95. First side surface; 96. First protrusion. DETAILED DESCRIPTION

[0056] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved by the present invention more clearly understood, the technical solutions of the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings. It is apparent that the described embodiments are only some of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0057] In the description of the present invention, unless otherwise expressly specified or limited, the terms "connected," "connected," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention in specific circumstances.

[0058] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0059] like Figures 1 to 4As shown, it includes a box body 1, a door body 2 and a paper feeding assembly 31, the box body 1 includes a back plate 11, and a first opening is provided on one side of the box body 1 perpendicular to the back plate 11, the door body 2 is blocked at the first opening, one end of the door body 2 is hinged to the box body 1 through a hinge device 4, and the door body 2 is locked on the box body 1 through a first locking mechanism 6, the paper feeding assembly 31 includes a first transmission shaft 311 and a second transmission shaft 312, the first transmission shaft 311 is arranged on the door body 2, and the second transmission shaft 312 is arranged in the box body 1, the outer side wall of the first transmission shaft 311 abuts against the outer side wall of the second transmission shaft 312, and the center axis of the first transmission shaft 311 and the center axis of the second transmission shaft 312 are arranged at intervals in the vertical direction. The door body 2 of the paper roll box is set on a side perpendicular to the back plate 11. The door body 2 can be opened from the side, and the paper roll can be directly clamped on the paper shaft in the paper roll box without removing the paper shaft. The operation is simple and convenient for replacing the paper roll. At the same time, after the paper roll is installed, the paper roll head is pulled out a section to the outside of the box body 1. After closing the door body 2, the door body 2 and the box body 1 can clamp the paper roll. There is no need for paper threading operation, which simplifies the paper changing operation and avoids paper jams. The door body 2 can lock and unlock the door body 2 and the box body 1 by setting a hinge device 4 and a first locking mechanism 6, and the hinge device 4 can keep the door body 2 in an open state, which is convenient for replacing the paper roll. The paper feeding assembly 31 arranges the first transmission shaft 311 and the second transmission shaft 312 at intervals in the vertical direction, and the first transmission shaft 311 and the second transmission shaft 312 have an inclined combined force at the abutment point, so that the paper roll can be tilted out to prevent the paper roll from being rolled into the outer wall of the first transmission shaft 311 or the second transmission shaft 312, thereby making the paper box have the function of preventing paper jams.

[0060] Further, if Figure 3 and Figure 4 As shown, the paper roll box is provided with an anti-paper jam structure 3, which includes a paper feeding assembly 31 and a paper cutting assembly 32. The paper cutting assembly 32 is arranged below the paper feeding assembly 31. The paper cutting assembly 32 includes a main knife 321 and an auxiliary knife 322 spaced apart from the main knife 321. A paper cutting opening is formed between the main knife 321 and the auxiliary knife 322. A paper feeding opening is formed between the first transmission shaft 311 and the second transmission shaft 312. The paper cutting opening and the paper feeding opening are spaced apart in the horizontal direction. The paper cutting assembly 32 also includes a first fixed seat and a second fixed seat 21. The main knife 321 is slidably arranged on the first fixed seat, and the auxiliary knife 322 is fixedly arranged on the second fixed seat 21. A paper cutting opening is formed between the main knife 321 and the auxiliary knife 322. When the main knife 321 abuts against the auxiliary knife 322, the paper roll can be cut. The paper cutting opening and the paper feeding opening are spaced apart in the horizontal direction, further improving the anti-paper jam effect of the paper box.

[0061] Specifically, the first transmission shaft 311 is a notched shaft, and the second transmission shaft 312 is a cylindrical shaft. The first transmission shaft 311 includes a first rotating shaft and a first abutting portion, with at least two first abutting portions spaced apart and sleeved on the outer wall of the first rotating shaft, and the first abutting portion abuts the outer wall of the second transmission shaft 312. When the paper feeding assembly 31 is feeding paper, the paper roll at the paper feed outlet may wrinkle due to the interaction between the first transmission shaft 311 and the second transmission shaft 312. In this embodiment, the first transmission shaft 311 is configured as a notched shaft, and wrinkles can be buffered at the notch to prevent wrinkles from spreading to the entire paper feed outlet and causing paper jams in the paper box. In other embodiments, the second transmission shaft 312 is a notched shaft, the first transmission shaft 311 is a cylindrical shaft, and the second transmission shaft 312 includes a second rotating shaft and a second abutting portion, with at least two second abutting portions spaced apart and sleeved on the outer wall of the second rotating shaft, and the second abutting portion abuts the outer wall of the first transmission shaft 311. This structure also has the effect of preventing further paper jams.

[0062] A first baffle 36 is disposed below the first transmission shaft 311, with a gap between the first baffle 36 and the first transmission shaft 311. A second baffle 37 is disposed below the second transmission shaft 312, with a gap between the second baffle 37 and the second transmission shaft 312. In this embodiment, the first baffle 36 is formed by bending the end of the first fixing base near the primary blade 321. This bending provides a more stable structure. The gap between the first baffle 36 and the first transmission shaft 311 prevents the roll of paper from being drawn into the first transmission shaft 311 while maintaining its stability. The second baffle 37 is formed by bending the end of the second fixing base 21 near the secondary blade 322, similarly enhancing its stability. The gap between the second baffle 37 and the second transmission shaft 312 prevents the roll of paper from being drawn into the second transmission shaft 312 while maintaining its stability.

[0063] As a preferred embodiment, the first transmission shaft 311 is the driving shaft, the second transmission shaft 312 is the driven shaft, the driving shaft is provided on the door body 2, and the rotation of the driving shaft can drive the driven shaft to rotate.

[0064] In one embodiment, the central axis of the first transmission shaft 311 is vertically higher than the central axis of the second transmission shaft 312. The combined force of the first and second transmission shafts 311 and 312 is tilted toward the first transmission shaft 311, causing the paper roll to be tilted toward the side closest to the first transmission shaft 311. Furthermore, the paper cutout is located adjacent to the first transmission shaft 311, and the paper roll's tilt direction is precisely toward the cutout, thereby achieving tilted paper delivery. Because the paper roll is tilted toward the first transmission shaft 311, the first baffle 36 is located away from the paper feed outlet. This ensures that the first baffle 36 does not affect paper feeding efficiency while preventing the paper roll from being drawn into the first transmission shaft 311. Similarly, because the paper roll is tilted toward the first transmission shaft 311, that is, away from the second transmission shaft 312, the second baffle 37 is located adjacent to the paper feed outlet, allowing the second baffle 37 to more effectively prevent paper jams.

[0065] In another embodiment, the central axis of the second transmission shaft 312 is vertically higher than the central axis of the first transmission shaft 311. The combined force of the first and second transmission shafts 311 and 312 is tilted toward the second transmission shaft 312, causing the paper roll to be tilted and discharged along the side close to the second transmission shaft 312. In addition, the paper cutter is located near the second transmission shaft 312, and the tilt direction of the paper roll is just tilted toward the paper cutter, thereby achieving tilted paper discharge. Since the paper roll is tilted toward the second transmission shaft 312, the second baffle 37 is located away from the paper feed port, so that the second baffle 37 does not affect the efficiency of paper feeding and can prevent the paper roll from being wound into the second transmission shaft 312. Similarly, since the paper roll is tilted toward the second transmission shaft 312, that is, the tilt direction of the paper roll is away from the first transmission shaft 311, the first baffle 36 is located near the paper feed port, and the first baffle 36 can more quickly prevent paper jams.

[0066] In this embodiment, the paper box also includes an adjustment component, which includes a fourth spring 35 and a first connecting member 34. The first connecting member 34 is rotatably connected to the end of the second transmission shaft 312. The end of the first connecting member 34 away from the second transmission shaft 312 is connected to the fourth spring 35. The fourth spring 35 always has a tendency to drive the second transmission shaft 312 to move closer to the first transmission shaft 311, so that the outer side wall of the second transmission shaft 312 always abuts against the outer side wall of the first transmission shaft 311. In this embodiment, a first mounting hole is provided at one end of the first connecting member 34, and a bearing is provided in the first mounting hole. The second transmission shaft 312 is inserted into the bearing so that the second transmission shaft 312 can rotate according to the rotation of the first transmission shaft 311. The end of the first connecting member 34 away from the first mounting hole is connected to one end of the fourth spring 35, and the other end of the fourth spring 35 is connected to the box body 1. The fourth spring 35 always has a tendency to drive the second transmission shaft 312 to move closer to the first transmission shaft 311, so that the outer side wall of the second transmission shaft 312 always abuts against the outer side wall of the first transmission shaft 311. On the outer wall, when the paper roll is jammed at the paper feed port, the force at the position where the paper jam occurs on the second transmission shaft 312 will increase, so that the first connecting member 34 will squeeze the fourth spring 35, so that a gap will appear between the second transmission shaft 312 and the first transmission shaft 311, allowing the paper roll to pass through the paper feed port through the gap. After the paper roll passes through the paper feed port, the fourth spring 35 will rebound and allow the second transmission shaft 312 to continue to abut against the first transmission shaft 311, thereby realizing the adjustment function of the paper feed assembly 31. Therefore, the paper box further prevents paper jams by setting an adjustment assembly.

[0067] Specifically, a first limiting shaft 341 protrudes from the end of the first connecting member 34 away from the second transmission shaft 312. A portion of the fourth spring 35 is sheathed outside the first limiting shaft 341. When a paper jam occurs at the paper feed port, the adjustment assembly adjusts the second transmission shaft 312. During this adjustment process, the fourth spring 35 deforms. The outer wall of the first limiting shaft 341 limits the fourth spring 35, concentrating its elastic force in one direction. This structure improves the adjustment effectiveness of the adjustment assembly. Furthermore, the first limiting shaft 341 prevents the middle portion of the fourth spring 35 from bending and causing damage, thereby increasing the service life of the fourth spring 35.

[0068] In order to improve the adjustment effect of the first transmission shaft 311, two adjustment components are provided, and the two adjustment components are rotatably connected to the two ends of the second transmission shaft 312 respectively. The two adjustment components adjust the two ends of the second transmission shaft 312 at the same time, thereby increasing the stability of the second transmission shaft 312 and further improving the anti-paper jam effect of the paper box.

[0069] In this embodiment, Figure 2As shown, the hinge device 4 includes a first connecting portion 41 and a second connecting portion 42 symmetrically arranged on both sides of the first connecting portion 41 in the width direction. A plurality of screw holes are provided on the door body 2, and the first connecting portion 41 is correspondingly provided with a plurality of openings. A first screw passes through the opening and is screwed into the screw hole to fix the door body 2 and the hinge device 4 in connection. The first connecting portion 41 of the hinge device 4 is detachably connected to the door body 2 by screws, which reduces the manufacturing difficulty of the door body 2 and facilitates installation. At the same time, the door body 2 and the hinge device 4 can be made of different materials. The door body 2 is made of a lighter material, and the hinge device 4 is made of a stronger material, which can reduce the weight of the door body 2 without affecting the overall strength of the door body 2.

[0070] Furthermore, the second connecting portion 42 is fixedly provided with a first boss 421 and a second boss 422. The box body 1 also includes a front plate 17 arranged opposite to the back plate 11. The front plate 17 and the back plate 11 are both provided with a second slide groove 171 and a third slide groove 172 at intervals. The second slide groove 171 is an elongated slide groove, and the length of the second slide groove 171 is arranged in the horizontal direction. The first boss 421 is slidably arranged in the second slide groove 171. The third slide groove 172 is an arc-shaped slide groove, and the second boss 422 is slidably arranged in the third slide groove 172. When the door body 2 is pulled open, the first boss 421 rotates in the second slide groove 171, and the second boss 422 slides along the arc in the third slide groove 172, thereby realizing the opening and closing of the door body 2.

[0071] Furthermore, the upper end of the third slide groove 172 is provided with a fourth slide groove 173 connected to the third slide groove 172. The fourth slide groove 173 is a long strip slide groove. The fourth slide groove 173 is arranged parallel to the second slide groove 171. The second slide groove 171 has a first end and a second end opposite to the first end (the first end is an end close to the fourth slide groove 173, and the second end is an end away from the fourth slide groove 173). The arc center of the third slide groove 172 is located at the first end. When the second boss 422 slides in the third slide groove 172, the first boss 421 rotates to the first end. When the second boss 422 moves in the fourth slide groove 173, the first boss 421 slides from the first end toward the second end to keep the door body 2 in the open state. By setting the fourth slide groove 173, and the fourth slide groove 173 is set parallel to the second slide groove 171, when the second boss 422 slides from the third slide groove 172 to the fourth slide groove 173, the door body 2 is gently pushed forward, so that the first boss 421 and the second boss 422 move to the other end of the slide groove in the same direction in the second slide groove 171 and the fourth slide groove 173 respectively, and the first boss 421 and the second boss 422 are supported in the second slide groove 171 and the fourth slide groove 173 respectively, so that the door body 2 can be kept in the open state. When changing the roll of paper, there is no need to hold the door body 2 all the time to prevent the door body 2 from slipping.

[0072] In this embodiment, the first transmission shaft 311 and the second fixing seat 21 are arranged at the end of the door body 2 away from the second connecting portion 42. The second fixing seat 21 is connected to the door body 2 by screws, and the first transmission shaft 311 is connected to the door body 2 through the second fixing seat 21. When using a paper roll, uneven force is applied to both sides, which can easily cause the paper roll to move left and right, thereby causing a paper jam. By providing the first transmission shaft 311 at the end of the door body 2 away from the second connecting portion 42, the paper roll can be evenly transported to the paper outlet, reducing the occurrence of paper jams. At the same time, there is no need to manually pull the paper roll, which prevents the paper roll from breaking in the paper roll box when pulling the paper roll, making it easier to use the paper roll.

[0073] Preferably, the first transmission shaft 311 is located at the lower end of the door body 2, and the second connecting portion 42 is located at the upper end of the door body 2. The paper outlet is set below the paper roll box, and the first transmission shaft 311 is also set at the lower end of the door body 2, corresponding to the paper outlet, to facilitate the delivery of paper rolls.

[0074] In this embodiment, Figure 2 As shown, the second fixing base 21 is provided with a second mounting hole, which is provided with a clearance notch. The first transmission shaft 311 is installed into the second mounting hole through the clearance notch. The provision of the second mounting hole and the clearance notch in the second fixing base 21 facilitates assembly and disassembly of the first transmission shaft 311. Specifically, one end of the first transmission shaft 311 is powered by the drive device through a gear assembly. The end of the first transmission shaft 311 closest to the gear assembly is secured by a bushing 61 and a gasket combination.

[0075] In this embodiment, the door body 2 is made of plastic, the hinge assembly 4 is made of metal, and the first connecting portion 41 is separated by a third opening 411. The plastic door body 2 reduces the weight of the paper roll box, while the metal hinge assembly 4, mounted on the door body 2, enhances the overall strength of the door body 2. Furthermore, the third opening 411 is separated by a third opening 411 from the first connecting portion 41, reducing the weight of the hinge assembly 4.

[0076] Specifically, first reinforcing ribs are provided on the inner sidewalls of the box body 1 and the door body 2. The inner sidewalls of the box body 1 and the door body 2 are provided with a plurality of screw holes for connecting with other components. The provision of the first reinforcing ribs can increase the strength of the roll paper box and simultaneously allow the wall thickness of the box body 1 and the door body 2 to be designed to be thinner, thereby reducing the weight of the roll paper box.

[0077] In this embodiment, Figures 5 to 8As shown, the door body 2 and the box body 1 are locked by the first locking mechanism 6, which includes a sleeve 61, a first locking piece 62, a second locking piece 63, a second spring 652 and a first memory wire 653. The sleeve 61 is sleeved on the end of the first transmission shaft 311, and the first locking piece 62 is rotatably set on the side wall of the box body 1. The first locking piece 62 is connected to a movable shaft 651, and the movable shaft 651 is spaced from the rotation center of the first locking piece 62. The second locking piece 63 is rotatably set on the side wall of the box body 1, and the second locking piece 63 is engaged with the first locking piece 62. The second locking piece 63 is provided with a locking groove 631 for locking the sleeve 61, and the space between the locking groove 631 and the rotation center of the second locking piece 63 is A first spring 64 is provided on the second locking member 63, and the first spring 64 always drives the second locking member 63 to rotate in the direction of clamping with the first locking member 62. The second spring 652 is connected to the movable shaft 651, and the second spring 652 always drives the movable shaft 651 to move along the first direction to make the first locking member 62 rotate in the direction of locking with the second locking member 63. The first memory wire 653 is connected to the movable shaft 651 and is tightened and arranged in the box body 1. When power is turned on, the first memory wire 653 pulls the movable shaft 651 to move in a second direction opposite to the first direction, so that the first locking member 62 and the second locking member 63 are separated, and the second locking member 63 is separated from the sleeve 61. When the first locking member 62 and the second locking member 63 are clamped, the first locking member 62 and the second locking member 63 are clamped.When the first memory wire 653 is energized, the first memory wire 653 contracts so that the tension of the first memory wire 653 increases, and the first memory wire 653 pulls the movable shaft 651 to move in the second direction. The movable shaft 651 drives the first locking member 62 to rotate in the direction of disengagement from the second locking member 63, and the second locking member 63 loses the clamping force of the first locking member 62. Since the second locking member 63 rotates under the drive of the first spring 64, the shaft sleeve 61 is disengaged from the locking groove 631. After the shaft sleeve 61 is disengaged, the door body 2 can be opened. Therefore, it is only necessary to energize the first memory wire 653 to achieve unlocking. The entire unlocking process is simple to operate, and the paper box does not need to be provided with an exposed lock hole, which is safe and reliable.

[0078] In order to enable the first memory wire 653 to move the movable shaft 651, when the first memory wire 653 is energized, the contraction force of the first memory wire 653 is greater than the elastic force of the second spring 652, so that the first memory wire 653 can pull the movable shaft 651 to move, thereby allowing the locking groove 631 to cancel the locking of the sleeve 61.

[0079] Specifically, such as Figure 9 As shown, the second locking member 63 is provided with a slot 632, and the first locking member 62 is provided with a corresponding tooth 621, which always abuts within the slot 632. In this embodiment, the slot 632 is spaced apart from the rotation center of the second locking member 63. The slot 632 is a V-shaped slot 632, and the tooth 621 is a V-shaped tooth 621 that matches the V-shaped slot 632. However, the V-shaped tooth 621 and the V-shaped slot 632 have a strong coupling force, and the V-shaped tooth 621 and the V-shaped slot 632 do not easily disengage when engaged. This structure can enhance the locking effect of the first locking mechanism 6. In addition, the V-shaped tooth 621 includes a first abutting surface and a second abutting surface set at an angle, and the V-shaped slot 632 includes a third abutting surface and a fourth abutting surface set at an angle. When the first and second locking members are locked, the first abutting surface abuts the third abutting surface, and the second abutting surface abuts the fourth abutting surface. The abutting surfaces, along with the force applied to the movement of the first and second locking members 62 and 63, ensure that the latching teeth 621 and the latching slots 632 will not fall out, even without the locking force applied by the second spring 652 and the movable shaft 651. Therefore, the second spring 652 of this structure can be locked with very little elastic force, while external destruction is required to open the lock.

[0080] In this embodiment, a movement 5 is provided in the box body 1, and the movement 5 is fixed at the lower end of the box body 1 near the paper outlet. Two first locking members 62 and second locking members 63 are provided, and are respectively located on the opposite side walls of the movement 5. The two ends of the movable shaft 651 are respectively connected to the first locking members 62. The locking grooves 631 provided on the two second locking members 63 respectively lock the sleeves 61 provided at both ends of the first transmission shaft 311, thereby improving the locking effect of the door body 2. Moreover, the first memory metal wire 653 is connected to the middle part of the movable shaft 651, so that when the first memory metal wire 653 pulls the movable shaft 651, the first locking members 62 connected at both ends of the movable shaft 651 rotate more coordinated.

[0081] Specifically, a fifth slide groove 55 is provided on the opposite side walls of the movement 5, and both ends of the movable shaft 651 are passed through the fifth slide groove 55. When the first memory metal wire 653 pulls the movable shaft 651 to move, the fifth slide groove 55 can limit the movable shaft 651 so that the movable shaft 651 can only move in the fifth slide groove 55, thereby improving the stability of the paper box unlocking process.

[0082] In this embodiment, the first locking mechanism 6 further includes a second connecting member 654, the movable shaft 651 being connected to the second connecting member 654. A second spring 652 is fixed at one end to the second connecting member 654 and at the other end to the box body 1. A first memory wire 653 is connected at one end to the second connecting member 654 and at the other end to a conductive post within the box body 1. The conductive post is electrically connected to a control circuit board within the box body 1 via a wire, enabling the second spring 652 and the first memory wire 653 to more effectively exert a force on the movable shaft 651, thereby driving the movable shaft 651 to move by driving the movement of the second connecting member 654. In this embodiment, the control circuit board controls the power supply to the conductive post, thereby causing the first memory wire 653 to be energized and contracted, thereby unlocking the paper box. The entire unlocking process is simple to operate.

[0083] Furthermore, a second limiting shaft 6541 is provided on the second connecting member 654, and a portion of the second spring 652 is sleeved outside the second limiting shaft 6541. In this embodiment, two second limiting shafts 6541 are provided at intervals on the second connecting member 654, and two second springs 652 are also provided. The sidewalls of the second limiting shafts 6541 can prevent the second springs 652 from deflecting when extending and contracting in the second direction, thereby affecting the locking effect of the first locking mechanism 6.

[0084] As a preferred solution, two third mounting holes are provided on the second connecting member 654, and the two third mounting holes are arranged at intervals. The movable shaft 651 is inserted into the third mounting holes, and the two third mounting holes are connected to the middle part of the movable shaft 651, so that the movement of the first locking members 62 on both sides of the movement 5 can be kept synchronized to ensure the door opening effect. Otherwise, one side of the first transmission shaft 311 will be open and the other side will be locked.

[0085] Preferably, a first positioning shaft 51 and a second positioning shaft 52 are provided on the side wall of the movement 5, and the first positioning shaft 51 and the second positioning shaft 52 are spaced apart. A first positioning hole 622 is provided at one end of the first locking member 62, and the first positioning shaft 51 is inserted into the first positioning hole 622. The second locking member 63 is provided with a second positioning hole 633 at the rotation center, and the second positioning shaft 52 is inserted into the second positioning hole 633. By providing the first positioning shaft 51 and the second positioning shaft 52 on the side wall of the movement 5, a positioning effect is achieved, which can improve the installation efficiency of the first locking member 62 and the second locking member 63.

[0086] Preferably, a third positioning hole 623 is provided on the first locking member 62 . The third positioning hole 623 is located between the latching tooth 621 and the first positioning hole 622 . The end of the movable shaft 651 is inserted into the third positioning hole 623 .

[0087] To ensure that the sleeve 61 slides smoothly into the locking groove 631 when the door 2 is closed, a guide surface 634 is provided on the end of the second locking member 63 proximal to the door 2. The guide surface 634 guides the sleeve 61 into the locking groove 631. A connecting surface is provided between the guide surface 634 and the locking groove 631. The angle between the guide surface 634 and the connecting surface is obtuse, which helps guide the sleeve 61 into the locking groove 631 when the door 2 is closed, thereby improving the smoothness of the closing of the door 2. The angle between the connecting surface and the sidewall of the locking groove 631 is acute. When the door 2 is locked, the sleeve 61 on the first transmission shaft 311 is not easily forcibly dislodged from the locking groove 631 by external forces, thereby opening the door 2.

[0088] Preferably, a micro switch 66 is provided on the side wall of the movement 5 and is located below the second locking member 63. The micro switch 66 can detect the open / close state of the door 2. In this embodiment, the micro switch 66 is a leaf switch. The leaf switch detects the open / close state of the door 2 to prevent the paper roll from being taken away by others due to forgetting to close the door 2 after replacing the paper roll, thereby preventing the loss of resources.

[0089] As a preferred solution, a limiting portion 54 is further provided on the side wall of the movement 5 , and the limiting portion 54 can prevent the second locking member 63 from excessively rotating.

[0090] Preferably, two first limit plates 53 are protruding from the side wall of the movement 5, the two first limit plates 53 are spaced apart, and the micro switch 66 is installed between the two first limit plates 53. The two first limit plates 53 limit the micro switch 66 on two opposite sides to prevent the micro switch 66 from shaking.

[0091] In this embodiment, Figures 10 to 12As shown, the paper roll box is an intelligent paper feeder through the paper feed assembly 31, so a first battery 121 is provided in the paper roll box, and the first battery 121 can power all electrical devices in the paper roll box. Therefore, a storage compartment 12 is provided in the box body 1, and a second opening 13 communicating with the storage compartment 12 is provided on the box body 1. A first battery 121 is provided in the storage compartment 12, and the first battery 121 is locked in the storage compartment 12 by a second locking mechanism 7. The second locking mechanism 7 includes a lock hook 73, a third locking member 71 and a second memory wire 72. The lock hook 73 is provided on the end face of the first battery 121 away from the second opening 13. The third locking member 71 includes a lock buckle 711 and a first elastic member 712. The lock buckle 711 is rotatably provided in the box body 1 and is located at a position where the storage compartment 12 is away from the second opening 13. On the outside of one end of the second opening 13, the lock buckle 711 and the lock hook 73 are clamped with each other to lock the first battery 121, and one end of the lock buckle 711 is connected to the first elastic member 712. The first elastic member 712 always has the tendency to drive the lock buckle 711 to clamp the lock hook 73. The second memory metal wire 72 is tautly arranged in the box body 1, and the second memory metal wire 72 is connected to the lock buckle 711. When the second memory metal wire 72 is energized, the second memory metal wire 72 contracts and pulls the lock buckle 711 to rotate so that the lock buckle 711 is separated from the lock hook 73 and unlocks the first battery 121. When the first battery 121 is completely inserted into the accommodating chamber 12, the lock buckle 711 in the box body 1 and the lock hook 73 on the first battery 121 are clamped with each other to lock the first battery 121, which can ensure the safety of the first battery 121 in the paper roll box and avoid loss; by rotating the lock buckle 711, the second memory metal wire 72 is energized and contracted to pull the lock buckle 711 to rotate, and the lock buckle 711 is disengaged from the lock hook 73. At the same time, the elastic force of the first elastic member 712 pushes the first battery 121 out of the accommodating chamber 12, thereby unlocking the first battery 121 and facilitating the replacement of the first battery 121.

[0092] Preferably, the first memory wire 653 and the second memory wire 72 are both made of nickel-titanium alloy wire, which contracts when powered on and returns to its original length when powered off, thereby resetting the third locking member 71. In other embodiments, the memory wire can also be made of other memory alloys.

[0093] In this embodiment, if Figure 13 As shown, a first groove 731 is provided at one end of the first battery 121, and a second protrusion 732 is provided on the side of the first groove 731 close to the lock buckle 711 protruding toward the width direction of the first battery 121. When the first battery 121 is locked, the lock buckle 711 slides into the first groove 731 and is clamped with the second protrusion 732.

[0094] In this embodiment, if Figure 12As shown, the storage compartment 12 includes a first body 122 and a second body 123. The first body 122 is a recessed mounting position on the movement 5. The first body 122 and the second body 123 form a storage compartment 12 for accommodating the first battery 121. The second body 123 is provided with a first avoidance notch 1231, and the lock catch 711 is locked with the lock catch 711 through the first avoidance notch 1231. The first body 122 is the upper body, and the second body 123 is the lower body. The second body 123 is provided with a first avoidance notch 1231. The lock catch 711 on the outer side of the storage compartment 12 away from the second opening 13 can enter the storage compartment 12 through the first avoidance notch 1231. When the first battery 121 is fully entered into the storage compartment 12, the lock catch 711 can be locked with the lock hook 73 on the first battery 121, thereby locking the first battery 121.

[0095] In this embodiment, if Figure 11 and Figure 12 As shown, the lock 711 includes a first arm 7111 and a second arm 7112 set at an angle, a first through hole 7113 is set at the connection between the first arm 7111 and the second arm 7112, and a third protrusion 1234 is set on the second body 123, and the third protrusion 1234 is inserted into the first through hole 7113. When the lock 711 is unlocked, the lock 711 can be unlocked by the third locking member 712, and the lock 711 can be unlocked by the third locking member 71.

[0096] Preferably, the first arm 7111 and the second arm 7112 are at right angles, the first elastic member 712 is parallel to the first arm 7111, and the force of the first elastic member 712 is perpendicular to the width direction of the first battery 121, so that the elastic force of the first elastic member 712 pushes the first battery 121 out, and the unlocking effect is better.

[0097] Specifically, a positioning post is provided at the end of the second arm 7112 away from the first through hole 7113. The first elastic member 712 is a fifth spring, one end of which is sleeved onto the positioning post. The positioning post facilitates installation of the fifth spring and also limits the position of the fifth spring, preventing it from shifting or falling during operation.

[0098] In this embodiment, a second through-hole is provided at one end of the second arm 7112 away from the first through-hole 7113, and the second memory wire 72 is fixed to the second through-hole. The lock catch 711 is fixed to one end of the second memory wire 72 via the second through-hole. The other end of the second memory wire 72 is electrically connected to the circuit board on the box body 1. The second memory wire 72 is arranged parallel to the first arm 7111. When the second memory wire 72 is energized, it contracts toward the second opening 13 of the storage compartment 12, pulling the second arm 7112 to compress the fifth spring. The lock catch 711 rotates, and the fifth spring pushes the first battery 121 out of the storage compartment 12, thereby disengaging the lock hook 73 of the first battery 121.

[0099] In this embodiment, an ejection assembly 74 is also included. The ejection assembly 74 includes a push rod 741 and a sixth spring 742. A second groove 56 is provided on the movement 5. The second groove 56 is spaced apart on the outside of the end of the accommodating chamber 12 away from the second opening 13. The second groove 56 is provided with a second avoidance gap 57. The second avoidance gap 57 is communicated with the accommodating chamber 12. The ejection assembly 74 is installed in the second groove 56. One end of the sixth spring 742 is against the groove wall of the second groove 56, and the other end is connected to the ejection rod 741. The ejection rod 741 passes through the second avoidance gap 57 and is against the first battery 121. When the first battery 121 is locked, the ejection assembly 74 abuts against the first battery 121 through the second avoidance notch 57, and the sixth spring 742 on the ejection assembly 74 undergoes elastic deformation. The second memory wire 72 is energized and contracts. When the first battery 121 is unlocked, the locking force of the first battery 121 disappears, and the elastic force of the sixth spring 742 of the ejection assembly 74 causes the ejector rod 741 to push the first battery 121 away from the third locking member 71, thereby facilitating the replacement of the first battery 121.

[0100] In this embodiment, if Figure 14 As shown, a third through hole 1232 is provided on the second body 123, and a cantilever 1233 is provided in the third through hole 1232 toward the length direction of the second body 123. A second protrusion 732 is provided on the cantilever 1233 toward the first body 122, and a third groove 1211 is provided on the first battery 121 corresponding to the second protrusion 732, and the second protrusion 732 is inserted into the third groove 1211.

[0101] Specifically, the second protrusion 732 includes a first inclined surface and a second inclined surface (not marked in the figure), the first inclined surface is the surface of the second protrusion 732 close to the first avoidance gap 1231, and the second inclined surface is the surface of the second protrusion 732 away from the first avoidance gap 1231. The first inclined surface and the second inclined surface are set at an acute angle, and the angle between the first inclined surface and the cantilever 1233 is smaller than the angle between the second inclined surface and the cantilever 1233. The first inclined surface and the second inclined surface form a second protrusion 732 with a sharp angle. When the first battery 121 enters the accommodating chamber 12, the second protrusion 732 can slide into the third groove 1211 and can press against the groove wall of the third groove 1211 close to the second opening 13, preventing the thrust of the first battery 121 from being too great and colliding with the side of the accommodating chamber 12 away from the second opening 13, thereby reducing the thrust of the first battery 121; when the first battery 121 is pushed out by the ejection assembly 74, the second protrusion 732 slides in the third groove 1211 and contacts the side of the third groove 1211 close to the third locking piece 71 and slides out of the third groove 1211. When contacting the side of the third groove 1211 close to the third locking piece 71, it can offset part of the thrust of the first battery 121, avoiding the thrust of the ejection assembly 74 being too great, causing the first battery 121 to be directly ejected from the accommodating chamber 12 and fall to the ground, thereby causing damage to the first battery 121.

[0102] In this embodiment, at least one guide rail 1235 is provided within the second body 123, and a sixth slide groove 1212 is recessed in the first battery 121. The guide rail 1235 is inserted into the sixth slide groove 1212, allowing the first battery 121 to slide along the length of the guide rail 1235. By providing the guide rail 1235 and the sixth slide groove 1212, the first battery 121 can be quickly and accurately inserted into the accommodating compartment 12 and locked, facilitating replacement of the first battery 121. Furthermore, after the first battery 121 is unlocked, the ejection assembly 74 pushes the first battery 121 to eject it. The guide rail 1235 and the sixth slide groove 1212 increase the friction between the first battery 121 and the second body 123, further offsetting the impact force on the first battery 121, preventing the first battery 121 from falling, and thus protecting the first battery 121.

[0103] In this embodiment, the first body 122 and the second body 123 are detachably connected, thereby improving the installation efficiency of the paper roll box.

[0104] In this embodiment, Figure 15 、 Figure 16 and Figure 17As shown, the paper roll box also includes a key 8, which is used to unlock the first locking mechanism 6 and the second locking mechanism 7. The key 8 includes a first shell 81 and a first switch 82, a second battery 86, and a second functional module 84 provided in the first shell 81. The first switch 82 is used to control the power off or on of the second battery 86 and the second functional module 84. The box body 1 is also provided with a first functional module, a first magnet 14, and an unlocking component. The first functional module is electrically connected to the unlocking component. The first functional module controls the unlocking component to unlock via an electrical signal. When the first switch 82 is close to the first magnet 14, the first switch 82 is turned on, and the second functional module 84 can send an unlocking signal to the first functional module, so that the first functional module sends an unlocking signal to the unlocking component. When the key 8 is in the standby state, the second functional module 84 in the key 8 is in the power-off state. When unlocking is required, the key 8 is brought close to the paper roll box, that is, the first switch 82 in the key 8 is brought close to the first magnet 14. The first switch 82 is magnetized, causing the first switch 82 to turn on and energize the second functional module 84. After energizing, the second functional module 84 can send an unlocking signal to the first functional module. After receiving the unlocking signal, the first functional module sends an electrical signal to the unlocking component to unlock. The entire unlocking process is efficient and simple. Unlocking can be completed by simply bringing the key 8 close to the paper roll box 2. Moreover, unlocking by electrical signal is safer than unlocking by traditional mechanical locks. After the key 8 is away from the paper roll box, the first switch 82 loses its magnetism, causing the second functional module 84 to be powered off, and the key 8 enters a power-off state so that the key 8 no longer consumes power. In addition, unlocking by electrical signal eliminates the need for an exposed keyhole on the box body 1. This not only makes the appearance beautiful, but also prevents others from using counterfeit metal keys 8 to insert the keyhole to unlock.

[0105] In this embodiment, the unlocking component can be the first memory metal wire 653 in the first locking mechanism 6 and the second memory metal wire 72 of the second locking mechanism 7. When the key 8 approaches the box body 1, the key 8 is powered on, and the second functional module 84 sends an unlocking signal to the first functional module. After the first functional module receives the signal, the first functional module controls the first memory metal wire 653 and the second memory metal wire 72 to be powered on, so that the first memory metal wire 653 and the second memory metal wire 72 are powered on and contracted to unlock.

[0106] As a preferred solution, after the second functional module 84 is powered on, the second functional module 84 and the first functional module are matched with each other by sending wireless signals. When the first functional module and the second functional module 84 are successfully matched, the second functional module 84 sends an unlocking signal to the first functional module, thereby improving the security of the locking device.

[0107] Specifically, a second switch 15 is provided on the inner sidewall of the box body 1. The second switch 15 is used to control whether the first functional module and the power supply are powered on or off. The key 8 also includes a magnetic supply member disposed within the first housing 81. When the magnetic supply member approaches the second switch 15, the magnetic supply member activates the second switch 15. In this embodiment, the first functional module includes a signal receiving module. The second switch 15 controls the electrical conduction of the signal receiving module. When locked, the signal receiving module is powered off. Even if the key 8 sends an unlocking signal to the signal receiving module, the signal receiving module cannot receive the signal. This design prevents the operator from accidentally placing the key 8 near other magnetic supply members, which could cause the second functional module 84 to become electrically conductive with the second battery 86 and automatically send an unlocking signal to the first functional module to unlock the key. The key 8 is provided with a magnetic supply member. When the key 8 approaches the box body 1, the first magnet 14 magnetizes the first switch 82, activating it and energizing the second functional module 84. At the same time, the magnetic supply component allows the second switch 15 to be magnetized, so that the signal receiving module is powered on, and the second functional module 84 can send an unlocking signal to the signal receiving module, thereby achieving unlocking.

[0108] As a preferred solution, the first switch 82 and the second switch 15 are both magnetic switches. A magnetic switch is a switch that utilizes magnetic field effects and has a simple structure and low manufacturing cost. In other embodiments, the first switch 82 and the second switch 15 may also use Hall sensors or Hall switches.

[0109] In one embodiment, the magnetizing member is an iron sheet 83. When the iron sheet 83 is close to the box body 1, at least a portion of the iron sheet 83 faces the first magnet 14 and the second switch 15. This allows the first magnet 14 to simultaneously magnetize the first switch 82 and the iron sheet 83. After the iron sheet 83 is magnetized, the iron sheet 83 can also magnetize the second switch 15. This structure controls the activation of the first switch 82 and the second switch 15 simultaneously through the first magnet 14. In other words, the first magnet 14 can simultaneously control the electrical conduction of the first functional module and the second functional module 84, thereby reducing the production cost of the key 8. In other embodiments, the magnetizing member can also be made of other magnetizable metal materials.

[0110] As a preferred solution, the first switch 82 is located close to the iron sheet 83 so that the first magnet 14 can simultaneously magnetize the iron sheet 83 and the first switch 82 for a better effect.

[0111] As a preferred solution, the second switch 15 is spaced apart from the first magnet 14 to prevent the magnetic field generated by the first magnet 14 from acting on the second switch 15 and causing the communication function of the first functional module to be in a communication state all the time.

[0112] In another embodiment, the magnetizing element is an electromagnet. Before the key 8 approaches the box body 1, the key 8 is in a power-off state. However, the electromagnet is non-magnetic in this power-off state. When the key 8 approaches the box body 1, the second switch 15 approaches the first magnet 14 and is magnetized. At this time, both the second functional module 84 and the electromagnet are energized, making the electromagnet magnetic. The electromagnet then magnetizes the second switch 15. When the second switch 15 is turned on, the signal receiving module is energized, allowing the first functional module to receive the unlock signal sent by the second functional module 84.

[0113] In another embodiment, the magnetic supply component includes an iron sheet 83 and a second magnet, and the iron sheet 83 and the second magnet are arranged at intervals in the first shell 81. When the key 8 approaches the box body 1, the second magnet can turn on the second switch 15, so that the communication function of the first functional module is energized, so that the first functional module can receive the unlocking signal sent from the second functional module 84. The iron sheet 83 can be magnetically fixed to the first magnet 14, so that the key 8 can be fixed on the side wall of the box body 1, thereby ensuring the stability of communication between the first functional module and the second functional module 84.

[0114] In order to prevent the magnetic field generated by the second magnet from acting on the first switch 82 after the key 8 is away from the box body 1, the second magnet is spaced apart from the first switch 82 to reduce the influence of the magnetic field generated by the second magnet on the first switch 82.

[0115] Specifically, a positioning groove 18 is recessed on the outer wall of the box body 1, and a positioning protrusion 811 is convexly provided on the outer wall of the first shell 81 corresponding to the positioning groove 18. The positioning protrusion 811 is inserted into the positioning groove 18 so that the first switch 82 faces the first magnet 14, thereby improving the unlocking efficiency.

[0116] As a preferred solution, a detection circuit board 16 is provided on one side of the first magnet 14 , a fixing groove is provided in the middle of the detection circuit board 16 , and the second switch 15 is a dry yellow tube fixed in the fixing groove.

[0117] Specifically, the key 8 includes an indicator light 85, which is arranged on a side surface of the first shell 81 away from the box body 1. The power status of the key 8 can be monitored by the indicator light 85. In this embodiment, the indicator light 85 indicates that the second functional module 84 is powered on, so the key 8 is in working condition.

[0118] In this embodiment, Figure 15 and Figure 18As shown, a paper roll card shaft 9 is provided on the back plate 11, and the paper roll card shaft 9 includes a second shell 91, and the second shell 91 is provided with a receiving cavity 911. A card block 92 and a control member 93 are provided in the second shell 91. The control member 93 is rotatably arranged in the receiving cavity 911. The second shell 91 is provided with a first slide groove 912 at intervals. One end of the first slide groove 912 is connected to the outside of the second shell 91, and the other end is connected to the receiving cavity 911. The card block 92 is slidably arranged in the first slide groove 912. In the embodiment of the present invention, one end of the card block 92 is located in the accommodating cavity 911 and abuts against the control member 93, and the other end extends through the first slide groove 912 to the outside of the second shell 91 and abuts against the inner wall of the paper roll. The control member 93 has a first position and a second position. When the control member 93 is in the first position, the control member 93 drives the card block 92 to extend to the outside of the second shell 91. When the control member 93 is in the second position, the control member 93 drives the card block 92 to retract into the inside of the second shell. By setting the card block 92 and the control member 93 to abut, the rotation of the control member 93 can not only drive the card block 92 to extend out of the second shell 91 to clamp the paper roll, but also the control member 93 can rotate between the first position and the second position and remain in the rotated position to control the length of the card block 92 extending from the second shell 91, thereby changing the diameter of the paper roll card shaft 9 and meeting the installation requirements of paper rolls with different apertures.

[0119] Specifically, the second housing 91 includes a third housing 915 and a fourth housing 916, which are detachably connected by screws. This detachable connection between the third housing 915 and the fourth housing 916 facilitates installation of components within the second housing 91. In other embodiments, the third housing 915 and the fourth housing 916 are detachably connected by a snap-fit mechanism.

[0120] In this embodiment, the control member 93 includes a cam 931 and a return spring 932. The cam 931 is connected to the return spring 932, and the return spring 932 drives the control member 93 to the first position. By providing the return spring 932 with a tendency to drive the control member 93 toward the first position, the control member 93 drives the clamping block 92 to extend outward from the second housing 91. The clamping block 92 can continuously apply force to the inner wall of the paper roll to clamp the paper roll.

[0121] Specifically, the control member 93 further includes a second elastic member 933 connected to the cam 931. The second elastic member 933 drives the control member 93 to the second position. When the control member 93 is in the second position, the second elastic member 933 can overcome the elastic force of the return elastic member 932, locking the control member 93 in the second position, and the locking block 92 can be retracted into the fourth housing 916.

[0122] Specifically, a fourth mounting hole 917 is provided in the center of the third housing 915 and the fourth housing 916, respectively. A first rotating post 934 and a second rotating post 935 are provided with the rotation center of the cam 931 toward the third housing 915 and the fourth housing 916, respectively. A reset elastic member 932 is mounted on the first rotating post 934, and a second elastic member 933 is mounted on the second rotating post 935. The first rotating post 934 and the second rotating post 935 respectively pass through the fourth mounting holes 917 of the third housing 915 and the fourth housing 916. When the control member 93 moves away from the first position, by pressing the end of the first rotating post 934 passing through the fourth mounting hole 917 of the third housing 915, the reset elastic member 932 can overcome the elastic force of the second elastic member 933, causing the control member 93 to return to the first position, thereby allowing the clamping block 92 to extend out of the shell body 91 to better clamp the inner wall of the paper roll.

[0123] In this embodiment, a cam 931 is rotatably disposed within the accommodating cavity 911. An arcuate slot 913 is provided on one side of the second housing 91. The center of the arcuate slot 913 is concentric with the rotational center of the cam 931. A driving post 936 is protruding from the cam 931. The free end of the driving post 936 extends through the arcuate slot 913 to the outside of the second housing 91. The outer peripheral wall of the cam 931 abuts against the block 92. By providing a constant abutment between the block 92 and the outer peripheral wall of the cam 931, when the driving post 936 slides within the arcuate slot 913, the cam 931 can rotate within the accommodating cavity 911. The outer peripheral wall of the cam 931 enables the block 92 to move within the first slide slot 912, allowing the block 92 to extend or retract into the second housing 91. At the same time, the arcuate slot 913 limits the rotational angle of the cam 931, preventing the driving post 936 from excessively rotating and causing the block 92 to disengage from the cam 931.

[0124] Specifically, the reset elastic member 932 is a first torsion spring. When the cam 931 is in the first position, the first torsion spring overcomes the elastic force of the second elastic member 933 and is in an initial state. When the cam 931 is away from the first position, it needs to overcome the elastic force of the first torsion spring to rotate.

[0125] Specifically, the moving direction of the clamping block 92 is always perpendicular to the tangent of the rotation center of the cam 931. Since the clamping block 92 is always pressed against the outer peripheral wall of the cam 931 and is perpendicular to the tangent of the rotation center of the cam 931, when an external force acts on the clamping block 92, the external force and the pressing force of the cam 931 cancel each other out, and the external force cannot retract the clamping block 92 into the second housing 91. Only the rotation of the cam 931 can control the extension and retraction movement of the clamping block 92. When clamping the paper roll, the clamping block 92 will not be compressed into the second housing 91, and the paper roll can be clamped more firmly.

[0126] In this embodiment, an eighth spring 94 is provided on the second shell 91 . The eighth spring 94 is connected to the clamping block 92 . The eighth spring 94 always has a movement tendency to drive the clamping block 92 to move toward the accommodating cavity 911 .

[0127] Specifically, if Figure 19 As shown, the block 92 is provided with a fourth through hole 921, the eighth spring 94 is a second torsion spring, and the second housing 91 is provided with a fixing post 918. The second torsion spring is mounted on the fixing post 918, and one end of the second torsion spring passes through the fourth through hole 921 and is connected to the block 92. By providing the second torsion spring, the block 92 has a tendency to retract into the second housing 91. When there is no external force on the paper roll clamping shaft 9, the forces acting on the block 92 by the reset elastic member 932, the first torsion spring, and the second torsion spring offset each other, allowing the block 92 to remain in any position within the first slide 912 and be adjusted to a suitable diameter to clamp the paper roll. At the same time, the second torsion spring can continuously apply force to the block 92, allowing the block 92 to slide over the friction of the first slide 912.

[0128] In other embodiments, the eighth spring 94 may also have a movement tendency to drive the clamping block 92 to move out of the second housing 91. The clamping block 92 can overcome the friction force of the first sliding groove 912 to slide.

[0129] In this embodiment, the arc-shaped groove 913 has a third end and a fourth end relative to each other, the fourth end is provided with a third avoidance notch 914, and a second reinforcing rib 937 is provided on the cam 931. The second reinforcing rib 937 is fixed on a side of the driving column 936 facing the second end. When the driving column 936 is located at the fourth end, the block 92 is completely retracted into the second shell 91. When the elastic force of the reset elastic member 932 overcomes the elastic force of the second torsion spring, the cam 931 rotates and resets to the first position, and the driving column 936 will rotate rapidly toward the third end. The provision of the second reinforcing rib 937 can prevent the driving column 936 from breaking due to excessive impact force during reset; when the driving column 936 is at the third end, the cam 931 is at the first position, and the diameter of the paper roll card shaft 9 is the largest. When the driving column 936 is at the fourth end, the cam 931 is at the second position, and the card block 92 is completely retracted into the second shell body 91. The provision of the third avoidance gap 914 can accommodate the second reinforcing rib 937 when the driving column 936 is at the fourth end, so as to avoid blocking the driving column 936 from reaching the fourth end.

[0130] Preferably, two arcuate slots 913 are provided, evenly spaced circumferentially around the rotation center of the cam 931, with a drive post 936 disposed within each arcuate slot 913. By arranging two drive posts 936 to slide within the two arcuate slots 913, clamping the two drive posts 936 allows the cam 931 to rotate in the same direction, with forces applied relatively to the drive posts 936, thus saving effort and facilitating clamping of the paper roll.

[0131] Preferably, if Figure 20 As shown, two paper roll clamps 9 are provided in the paper roll box. The two paper roll clamps 9 are located at opposite positions of the back plate 11 and the front plate 17. By setting the two paper roll clamps 9 to clamp the two ends of the paper roll, the diameter of the paper roll clamps 9 can be adjusted when changing the paper roll. The clamping effect of the paper roll is good, and there is no need to remove the paper roll clamps 9, making it convenient to change the paper roll.

[0132] Furthermore, if Figure 15 As shown, a mounting groove 111 is provided on the back plate 11, and the mounting groove 111 is adjacent to the paper roll card shaft 9. A slider 1111 is provided in the mounting groove 111, and the slider 1111 protrudes toward the paper roll card shaft 9 and is provided with a third baffle 1112. The side of the slider 1111 away from the paper roll card shaft 9 is connected to a third spring, and the third spring always drives the third baffle 1112 to abut against the first side surface 95 of the paper roll card shaft 9, and the first side surface 95 is provided with a first protrusion 96 at a ring-shaped interval toward the card block 92. When the driving mechanism drives the paper roll card shaft 9 to rotate, the paper roll card shaft 9 overcomes the force of the third spring and drives the slider 1111 to compress, which will not block the continuous rotation of the paper roll card shaft 9. When the driving mechanism stops driving the paper roll card shaft 9 to rotate, the elastic force of the third spring drives the third baffle 1112 of the slider 1111 to abut against one side of the first protrusion 96 on the first side surface 95, blocking the paper roll card shaft 9 from continuing to rotate due to inertia, thereby preventing the paper roll from accumulating at the paper outlet and causing paper jam.

[0133] Preferably, a detection device is provided within the box body 1, capable of detecting whether paper is present on the paper roll shaft 9. The detection device includes a circuit board and a magnetic induction switch. A circuit board is provided on the inner sidewall of the box body 1 near the paper roll shaft 9, and a magnetic induction switch is provided on the circuit board. Two fourth grooves 919 are symmetrically arranged along the rotation center within the accommodating cavity 911 of the paper roll shaft 9. A third magnet is provided within the fourth groove 919. When the paper roll shaft 9 rotates, the third magnet generates a magnetic field that closes and energizes the magnetic induction switch. When there is no paper in the paper box, the paper roll shaft 9 continuously rotates at idle speed, and the magnetic field generated by the third magnet continuously magnetizes and energizes the magnetic induction switch. When there is paper in the paper box, the paper roll shaft 9 does not continuously rotate at idle speed, and the magnetic field generated by the third magnet does not continuously act on the magnetic induction switch. Whether there is paper in the paper box is determined by whether the magnetic induction switch remains closed and energized.

[0134] In this embodiment, Figure 15As shown, at least two gourd holes 112 are provided on the back panel 11, and gourd nails are provided on the supporting body corresponding to the gourd holes 112. A fixing hole is provided on the end of the gourd nail away from the supporting body. An elastic hook 113 is provided on the side of the back panel 11 away from the supporting body. After the gourd nail is inserted into the gourd hole 112 and snaps into the narrow end of the gourd hole 112, the elastic hook 113 is buckled with the fixing hole. In this embodiment, the supporting body is a wall, and three gourd nails are provided on the wall. The three gourd nails are distributed in a triangular shape, with the narrow end of the gourd nail connected to the wall, and the gourd nail is connected to the wall vertically. Three gourd holes 112 are provided on the back panel 11 corresponding to the gourd nails. When the paper roll box is installed, when the wide end of the gourd nail is inserted into the gourd hole 112 and stuck into the narrow end of the gourd hole 112, the side wall of the gourd nail will squeeze the elastic hook 113 to one side. When the fixing hole in the gourd nail moves to the appropriate position, the elastic hook 113 will hook the fixing hole to lock the paper roll box. If the paper roll box needs to be removed from the wall, it is necessary to open the door body and twist the elastic hook 113 from the inside of the paper roll box so that the elastic hook 113 no longer engages the fixing hole before the paper roll box can be removed. This structure can prevent the paper roll box from detaching from the wall when it is lifted by external force.

[0135] In the description of this article, it should be understood that the terms "upper", "lower", etc., and the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present invention.

[0136] In the description of this specification, the description of reference terms such as "an embodiment" means that the specific features, structures, materials, or characteristics of the embodiment are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment.

[0137] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

[0138] The technical principles of the present invention have been described above with reference to specific embodiments. These descriptions are intended solely to illustrate the principles of the present invention and are not to be construed in any way as limiting the scope of protection of the present invention. Based on the explanations herein, those skilled in the art will readily conceive of other specific embodiments of the present invention without inventive effort, and such embodiments will fall within the scope of protection of the present invention.

Claims

1. A roll paper box, comprising a box body, a door body and a paper feeding assembly, characterized in that: The box body includes a back plate, and the box body is provided with a first opening on one side perpendicular to the back plate, the door body blocks the first opening, one end of the door body is hinged to the box body through a hinge device, and the door body is locked to the box body by a first locking mechanism, and the paper feeding assembly includes a first transmission shaft and a second transmission shaft, the first transmission shaft is arranged on the door body, and the second transmission shaft is arranged in the box body, the outer side wall of the first transmission shaft abuts against the outer side wall of the second transmission shaft, and the central axis of the first transmission shaft and the central axis of the second transmission shaft are arranged at intervals in the vertical direction; a paper roll card shaft is provided on the back plate, and the paper roll card shaft includes a second shell, and the second shell is provided with a accommodating cavity, The second shell is provided with a card block and a control member, the control member is rotatably arranged in the accommodating cavity, the second shell is spaced apart from each other with a first slide groove, one end of the first slide groove is communicated with the outside of the second shell, and the other end is communicated with the accommodating cavity, the card block is slidably arranged in the first slide groove, one end of the card block is located in the accommodating cavity and abuts against the control member, and the other end passes through the first slide groove and extends to the outside of the second shell and abuts against the inner wall of the paper roll of the paper roll, the control member has a first position and a second position, when the control member is in the first position, the control member drives the card block to extend to the outside of the second shell, and when the control member is in the second position, the control member drives the card block to retract into the inside of the second shell; A paper cutting assembly is also provided below the paper feeding assembly, and the paper cutting assembly includes a main knife and an auxiliary knife spaced apart from the main knife, a paper cutting opening is formed between the main knife and the auxiliary knife, a paper feeding opening is formed between the first transmission shaft and the second transmission shaft, and the paper cutting opening and the paper feeding opening are spaced apart in the horizontal direction.

2. The roll paper box according to claim 1, characterized in that: The first transmission shaft includes a first rotating shaft and a first abutting portion, at least two of the first abutting portions are sleeved on the outer wall of the first rotating shaft at intervals, and the first abutting portion abuts against the outer wall of the second transmission shaft; or, The second transmission shaft includes a second rotating shaft and a second abutting portion. At least two second abutting portions are sleeved on the outer side wall of the second rotating shaft at intervals, and the second abutting portion abuts against the outer side wall of the first transmission shaft.

3. The roll paper box according to claim 1, characterized in that: The first transmission shaft is a driving shaft, and the second transmission shaft is a driven shaft; or, The first transmission shaft is a driven shaft, and the second transmission shaft is a driving shaft.

4. The roll paper box according to claim 1, characterized in that: The first locking mechanism comprises: a shaft sleeve, the shaft sleeve being sleeved on the end portion of the first transmission shaft; a first locking member rotatably disposed on a side wall of the box body, the first locking member being connected to a movable shaft, the movable shaft being spaced from a rotation center of the first locking member; a second locking member, the second locking member being rotatably mounted on a side wall of the box body, the second locking member being engaged with the first locking member, the second locking member being provided with a locking groove for locking the shaft sleeve, the locking groove being spaced from a rotation center of the second locking member, the second locking member being provided with a first spring, the first spring always driving the second locking member to rotate in a direction of engagement with the first locking member; a second spring connected to the movable shaft, the second spring always driving the movable shaft to move along a first direction so that the first locking member rotates in a direction of locking with the second locking member; A first memory metal wire is connected to the movable shaft and is tautly arranged in the box body. When power is turned on, the first memory metal wire pulls the movable shaft to move in a second direction opposite to the first direction, so that the first locking member and the second locking member are separated, and the second locking member is separated from the sleeve.

5. The roll paper box according to claim 1, characterized in that: A storage compartment is provided in the box body, a second opening communicating with the storage compartment is provided in the box body, a first battery is provided in the storage compartment, and the first battery is locked in the storage compartment by a second locking mechanism.

6. The roll paper box according to claim 5, characterized in that: The second locking mechanism comprises: a locking hook, the locking hook being arranged on an end surface of the first battery away from the second opening; a third locking member, the third locking member comprising a lock catch and a first elastic member, the lock catch being rotatably disposed within the box body and located outside an end of the accommodating compartment away from the second opening, the lock catch and the lock hook being mutually engaged to lock the first battery, one end of the lock catch being connected to the first elastic member, and the first elastic member always having a tendency to drive the lock catch to engage the lock hook; The second memory metal wire is tautly arranged in the box body, and the second memory metal wire is connected to the lock buckle. When the second memory metal wire is energized, the second memory metal wire contracts and pulls the lock buckle to rotate so that the lock buckle is separated from the lock hook and unlocks the first battery.

7. The roll paper box according to claim 1, characterized in that: The key includes a first shell and a first switch, a second battery, and a second functional module arranged in the first shell. The first switch is used to control the power off or on of the second battery and the second functional module. The box body is also provided with a first functional module, a first magnet, and an unlocking component. The first functional module is electrically connected to the unlocking component. The first functional module controls the unlocking component to unlock through an electrical signal. When the first switch is close to the first magnet, the first switch is turned on, and the second functional module can send an unlocking signal to the first functional module.

8. The roll paper box according to claim 1, characterized in that: The control member includes a cam and a reset elastic member. The cam is connected to the reset elastic member. The reset elastic member drives the control member to be located at the first position.

9. The roll paper box according to claim 8, characterized in that: The control member further includes a second elastic member connected to the cam, and the second elastic member drives the control member to the second position.

10. The roll paper box according to claim 8, characterized in that: The cam is rotatably arranged in the accommodating cavity, and an arc-shaped groove is provided on one side of the second shell. The center of the arc-shaped groove is concentric with the rotation center of the cam. A driving column is protruding from the cam, and the suspended end of the driving column passes through the arc-shaped groove and extends to the outside of the second shell. The outer peripheral wall of the cam abuts against the block.

11. The roll paper box according to claim 10, characterized in that: The moving direction of the clamping block is always perpendicular to the tangent line of the rotation center of the cam.

12. The roll paper box according to claim 1, wherein: A detection device is provided in the box body, and the detection device can detect whether there is paper on the paper roll card shaft.

13. The roll paper box according to claim 1, characterized in that: A mounting groove is provided on the back plate, the mounting groove is adjacent to the paper roll card shaft, a slider is provided in the mounting groove, the slider is provided with a third baffle protruding toward the paper roll card shaft, and a third spring is connected to the side of the slider away from the paper roll card shaft, and the third spring always drives the third baffle to abut against the first side surface of the paper roll card shaft, and the first side surface is provided with a first protrusion at an annular interval toward the card block.

14. The roll paper box according to claim 1, characterized in that: The hinge device includes a first connecting part and a second connecting part symmetrically arranged on both sides of the first connecting part in the width direction. A plurality of screw holes are arranged on the door body, and a plurality of openings are arranged on the first connecting part corresponding to the screw holes. The first screw passes through the opening and is screwed into the screw hole to fix the door body and the hinge device in connection.

15. The roll paper box according to claim 1, characterized in that: At least two gourd holes are provided on the back panel, the paper roll box is provided on the carrying body, the carrying body is provided with gourd nails corresponding to the gourd holes, a fixing hole is provided at one end of the gourd nail away from the carrying body, and an elastic hook is provided on a side wall of the back panel away from the carrying body. After the gourd nail is inserted into the gourd hole and stuck in the narrow end of the gourd hole, the elastic hook is buckled with the fixing hole.

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