Paper hopper mechanism and printer

Abstract

The application discloses a paper bin mechanism and a printer. The paper bin mechanism comprises a paper clamping limiting device and a paper feeding device. The paper clamping limiting device comprises a base assembly, a first clamping piece, a second clamping piece and an adjusting assembly. The base assembly is provided with a fixing seat, a first sliding block and a second sliding block. The first clamping piece is connected to the first sliding block, and the second clamping piece is connected to the second sliding block and forms a clamping space with the first clamping piece. The adjusting assembly can adjust the width of the clamping space. The paper feeding device is provided with a first rolling assembly, a second rolling assembly and a third rolling assembly. The first rolling assembly and the second rolling assembly can well support the rolling of a paper roll, so that the paper feeding is smoother. When the paper roll shakes along the paper feeding direction under the action of a paper feeding driving force or other external forces, the third rolling assembly can limit and support the rolling of the paper roll, so that the shaking of the paper roll can be greatly reduced, the smoothness of the paper feeding is improved, and the printing quality is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of printing equipment, in particular to a paper bin mechanism and a printer. BACKGROUND

[0002] The printer is a common office equipment. During the use of the printer, one of the main operations of the user is to change paper. In the related art, the printer is usually provided with a paper bin mechanism. When the user changes paper, the user needs to place a paper roll into a paper clamping limiting device of the paper bin mechanism. However, the existing paper bin mechanism needs to position the paper roll at the shaft center during the paper changing operation, which increases the operation difficulty and operation time. Some of the existing paper bin mechanisms can only limit several specific widths of the paper roll, which reduces the applicability of the paper bin mechanism. In addition, when the paper is fed, the paper roll is prone to shaking, which affects the paper feeding and reduces the printing quality. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art. To this end, the present application provides a paper bin mechanism which is convenient to operate, has high adaptability and is not prone to shaking of the paper roll.

[0004] The present application also provides a printer with the above paper bin mechanism.

[0005] According to the paper bin mechanism of the first aspect of the present application, the paper bin mechanism comprises:

[0006] The paper clamping limiting device comprises a base assembly, a clamping assembly and an adjusting assembly. The base assembly is provided with a fixed seat, a first sliding block and a second sliding block. The first sliding block and the second sliding block are reversibly slidably installed on the fixed seat. The clamping assembly comprises a first clamping piece and a second clamping piece. The first clamping piece is connected to the first sliding block. The second clamping piece is connected to the second sliding block and forms a clamping space for accommodating the paper roll with the first clamping piece. The adjusting assembly is used to adjust the width of the clamping space.

[0007] The paper feeding device is located at the bottom of the clamping space and is provided with a first rolling assembly, a second rolling assembly and a third rolling assembly. The first rolling assembly and the second rolling assembly are arranged at intervals and are respectively supported on both sides of the paper roll along the center of gravity line. The third rolling assembly is arranged on one side of the second rolling assembly in the paper feeding direction, and the position of the third rolling assembly is higher than that of the second rolling assembly.

[0008] According to the paper bin mechanism of the present application, at least the following beneficial effects are achieved:

[0009] When the paper roll is first loaded, one of the first clamping member and the second clamping member is pushed away, so that the other one of the first clamping member and the second clamping member is reversely moved through the cooperation of the first slider and the second slider, so that the user can conveniently place the paper roll at the bottom of the clamping space surrounded by the first clamping member and the second clamping member, so that the first rolling assembly and the second rolling assembly can support the paper roll on both sides of the barycentric line, and then the width of the clamping space is adjusted through the adjusting assembly, so that the paper roll of different widths can be well limited, the adaptability is high, if the same width paper roll is loaded next time, the adjusting assembly does not need to be adjusted again, which is favorable to improve the convenience of paper loading, reduce the paper loading time and improve the printing efficiency; when the paper is fed, the first rolling assembly and the second rolling assembly can well roll and support the paper roll, so that the paper feeding is more smooth, and when the paper roll shakes along the paper feeding direction under the action of the paper feeding driving force or other external force, the third rolling assembly can limit and roll the paper roll, so that the shaking of the paper roll can be greatly reduced, the smoothness of the paper feeding is improved, and the printing quality is improved.

[0010] According to some embodiments of the present application, the first rolling assembly, the second rolling assembly and the third rolling assembly are tangent to the contour line of the maximum outer circle of the paper roll.

[0011] According to some embodiments of the present application, the first rolling assembly and the second rolling assembly are horizontally arranged and symmetrically relative to the barycentric line of the paper roll.

[0012] According to some embodiments of the present application, the first rolling assembly, the second rolling assembly and the third rolling assembly are of the same structure and each include a paper feeding shaft and a shaft sleeve, the shaft sleeve being rotatably sleeved on the outer wall of the paper feeding shaft.

[0013] According to some embodiments of the present application, the first clamping member and / or the second clamping member is provided with a bottom plate, a buffer plate and a second elastic member, the buffer plate being connected to the inner side wall of the bottom plate through the second elastic member.

[0014] According to some embodiments of the present application, the number of the second elastic members is multiple, and the multiple second elastic members are distributed between the buffer plate and the bottom plate.

[0015] According to some embodiments of the present application, the clamping assembly further includes an abutting member for reducing the contact area with the paper roll, the abutting member being arranged on the inner side surface of the first clamping member and / or the second clamping member.

[0016] According to some embodiments of the present application, the abutting member is a convex rib, and the convex rib is arranged in the vertical direction.

[0017] According to some embodiments of the present invention, there are multiple ribs, and the multiple ribs are evenly spaced on the inner sides of the first clamping member and the second clamping member.

[0018] A printer according to a second aspect of the present invention includes a paper tray mechanism according to a first aspect of the present invention.

[0019] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0020] Additional aspects and advantages of the invention will become apparent and readily understood in conjunction with the following description of the embodiments, in which:

[0021] Figure 1 This is a top view of the paper storage mechanism according to some embodiments of the present invention;

[0022] Figure 2 This is a side view of the paper storage mechanism according to some embodiments of the present invention;

[0023] Figure 3 for Figure 2 Layout diagram of the paper feeding device;

[0024] Figure 4 This is a side view of the paper storage mechanism according to some other embodiments of the present invention;

[0025] Figure 5 This is a three-dimensional structural schematic diagram of the paper clamping and limiting device according to some embodiments of the present invention;

[0026] Figure 6 for Figure 5 An exploded view of the second clamping component;

[0027] Figure 7 for Figure 5 Enlarged diagram of point A in the diagram;

[0028] Figure 8 for Figure 5 Enlarged diagram of point B in the image;

[0029] Figure 9 This is a three-dimensional structural diagram of the paper storage mechanism according to some embodiments of the present invention.

[0030] The attached icons are numbered as follows:

[0031] Base assembly 100; fixed seat 110; slide groove 111; first slider 120; limit block 121; second slider 130; second rack 131; gear 140;

[0032] First clamping component 200;

[0033] Second clamping piece 300; bottom plate 310; buffer plate 320; second elastic piece 330; convex rib 340;

[0034] Adjusting assembly 400; adjusting block 410; adjusting rod 420; adjusting hand wheel 430;

[0035] Clamping space 500;

[0036] First rolling assembly 600; paper feeding shaft 610; shaft sleeve 620;

[0037] Second rolling assembly 700;

[0038] Third rolling assembly 800;

[0039] Paper roll 900; reel shaft 910; contour line 920; center of gravity line 930. DETAILED DESCRIPTION

[0040] The embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary only, for the purpose of explaining the present application, and should not be understood as a limitation of the present application.

[0041] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is based on the orientation or position relationship shown in the drawings, and is only for the purpose of facilitating the description of the present application and simplifying the description, and therefore cannot be understood as a limitation of the present application.

[0042] In the description of the present application, if there is a description of first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or implicitly indicating the order of indicated technical features.

[0043] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0044] The printer is a common office equipment, and one of the main operations of the user in the use process of the printer is paper changing. In the related art, the printer is usually provided with a paper bin mechanism, and the user needs to put the paper roll 900 into the paper clamping limiting device of the paper bin mechanism when changing paper. However, the existing paper bin mechanism needs to position the paper roll 900 on the axis during the paper changing operation, which increases the operation difficulty and operation time, and some paper bin mechanisms can only limit several specific widths of the paper roll 900, which reduces the applicability of the paper bin mechanism, and when the paper is running, the paper roll 900 is easy to shake and affect the paper running, which reduces the printing quality.

[0045] Therefore, the paper bin mechanism provided by the present application is convenient for paper changing operation, has high adaptability, and the paper roll 900 is not easy to shake.

[0046] With reference to Figures 1 to 9 The paper bin mechanism provided by the first aspect embodiment of the present application is applied to a printer. The paper bin mechanism comprises a paper clamping limiting device and a paper running device. The paper clamping limiting device comprises a base assembly 100, a clamping assembly and an adjusting assembly 400. The base assembly 100 is provided with a fixed seat 110, a first sliding block 120 and a second sliding block 130. The first sliding block 120 and the second sliding block 130 are reversibly slidably installed on the fixed seat 110. For example, when the first sliding block 120 moves to the left, the second sliding block 130 can be driven to move to the right; or when the second sliding block 130 moves to the right, the first sliding block 120 can be driven to move to the left.

[0047] The clamping assembly comprises a first clamping piece 200 and a second clamping piece 300. The first clamping piece 200 is connected to the first sliding block 120, and the second clamping piece 300 is connected to the second sliding block 130. The second clamping piece 300 and the first clamping piece 200 form a clamping space 500 for clamping and limiting the paper roll 900. The first clamping piece 200 and the second clamping piece 300 have a tendency to move close to each other, so that automatic reset can be realized during paper loading, and the operation convenience is improved.

[0048] The adjusting assembly 400 can adjust the stroke of the first sliding block 120 or the second sliding block 130 to adjust the width of the clamping space 500. When the first sliding block 120 or the second sliding block 130 moves to the maximum stroke, the distance between the first sliding block 120 and the second sliding block 130 reaches the minimum, and at this time, the width of the clamping space 500 reaches the minimum value. The adjusting assembly 400 can change the stroke of the first sliding block 120, for example, to make the maximum stroke of the first sliding block 120 smaller, so that the width of the clamping space 500 is larger, or to make the maximum stroke of the second sliding block 130 smaller, so that the width of the clamping space 500 is larger, to adapt to paper rolls 900 of different widths.

[0049] With reference to Figures 2 to 4The paper feeding device is located at the bottom of the clamping space 500, and the paper feeding device is provided with a first rolling assembly 600, a second rolling assembly 700 and a third rolling assembly 800. The first rolling assembly 600, the second rolling assembly 700 and the third rolling assembly 800 can be a rolling wheel assembly or other rolling assemblies, which can roll to improve the smoothness of paper feeding.

[0050] Specifically, the first rolling assembly 600 and the second rolling assembly 700 are arranged at intervals. When the paper roll 900 is placed in the clamping space 500, the paper roll 900 can move to the bottom of the clamping space under the action of its own gravity. At this time, the first rolling assembly 600 and the second rolling assembly 700 can support the paper roll 900 on both sides along the gravity center line 930, respectively. The third rolling assembly 800 is arranged on one side of the second rolling assembly 700 along the paper feeding direction, and the position of the third rolling assembly 800 is higher than that of the second rolling assembly 700, so as to limit the paper roll 900 and prevent the paper roll 900 from shaking towards the paper feeding direction. Of course, it should be noted that the paper roll 900 has a reel 910, the distance between the first rolling assembly 600 and the second rolling assembly 700, and the distance between the second rolling assembly 700 and the third rolling assembly 800 are all less than the inner diameter of the reel 910 of the paper roll 900, so as to prevent the paper roll 900 from falling down from the gap between the first rolling assembly 600 and the second rolling assembly 700, or the gap between the second rolling assembly 700 and the third rolling assembly 800 when the paper amount of the paper roll 900 is reduced to the minimum.

[0051] When the paper is first loaded, one of the first clamping part 200 and the second clamping part 300 is pushed away, so that the other one of the first clamping part 200 and the second clamping part 300 is driven to move reversely through the cooperation of the first sliding block 120 and the second sliding block 130, so that the user can conveniently place the paper roll 900 at the bottom of the clamping space 500 surrounded by the first clamping part 200 and the second clamping part 300, and the first rolling assembly 600 and the second rolling assembly 700 can support the paper roll 900 on both sides along the gravity center line 930. Then, the width of the clamping space 500 is adjusted by the adjusting assembly 400, so as to well limit the paper roll 900 with different widths, and the adaptability is high. If the same width of the paper roll 900 is loaded next time, the adjusting assembly 400 does not need to be adjusted again, which is beneficial to improve the convenience of paper loading, reduce the time of paper loading and improve the efficiency of printing. When the paper is fed, the first rolling assembly 600 and the second rolling assembly 700 can well roll and support the paper roll 900, so that the paper feeding is smoother. When the paper roll 900 shakes along the paper feeding direction under the action of the paper feeding driving force or other external force, the third rolling assembly 800 can limit and roll support the paper roll 900, so as to greatly reduce the shaking of the paper roll 900 and improve the smoothness of paper feeding, thereby improving the quality of printing.

[0052] With reference to Figure 4 It can be understood that the size of the clamping space 500 is limited, and therefore the paper bin mechanism is usually provided with a maximum outer radius size of the paper roll 900 that can be accommodated. When the outer radius of the paper roll 900 is greater than the set size, the clamping space 500 cannot well limit the paper roll 900 to feed the paper. Therefore, in some embodiments of the present application, the first rolling assembly 600, the second rolling assembly 700 and the third rolling assembly 800 are tangent to the profile line 920 of the maximum outer circle of the paper roll 900, so that when the outer radius of the paper roll 900 is less than or equal to the set size, the first rolling assembly 600 and the second rolling assembly 700 can well support the paper roll 900, and the third rolling assembly 800 can well limit the paper roll 900 to prevent the paper roll 900 from shaking.

[0053] With reference to Figure 4 It can be understood that, in order to further improve the stability of the first rolling assembly 600 and the second rolling assembly 700 supporting the paper roll 900 and reduce the shaking of the paper roll 900, in some embodiments of the present application, the first rolling assembly 600 and the second rolling assembly 700 are horizontally arranged and symmetrical with respect to the center of gravity line 930 of the paper roll 900, so that the supporting force of the first rolling assembly 600 and the second rolling assembly 700 on the paper roll 900 is basically consistent, and therefore the stability of the paper roll 900 is higher, which is beneficial to reduce the shaking of the paper roll 900.

[0054] With reference to Figure 3 It can be understood that, in order to enable the paper roll 900 to smoothly feed the paper through the paper feeding device and reduce the number of part specifications of the paper feeding device and improve the convenience of installation, in some embodiments of the present application, the first rolling assembly 600, the second rolling assembly 700 and the third rolling assembly 800 are the same in structure and each include a paper feeding shaft 610 and a shaft sleeve 620. The shaft sleeve 620 is rotatably sleeved on the outer wall of the paper feeding shaft 610. When the paper roll 900 is placed in the clamping space 500, the paper roll 900 falls onto the first rolling assembly 600 and the second rolling assembly 700 under the action of its own gravity. When feeding the paper, the paper roll 900 can roll on the first rolling assembly 600 and the second rolling assembly 700. At this time, the shaft sleeve 620 rotates relative to the paper feeding shaft 610, which reduces the resistance of the paper roll 900 to feed the paper and improves the smoothness of feeding the paper. At the same time, since the first rolling assembly 600, the second rolling assembly 700 and the third rolling assembly 800 are the same in structure and each include a paper feeding shaft 610 and a shaft sleeve 620, the number of part specifications of the paper feeding device can be greatly reduced, the difficulty of installation is reduced, and the efficiency of installation is improved.

[0055] With reference to Figure 5 and Figure 6It can be understood that, in order to reduce the clamping impact force of the clamping assembly on the paper roll 900, in some embodiments of the present application, the first clamping piece 200 and / or the second clamping piece 300 are provided with a bottom plate 310, a buffer plate 320 and a second elastic piece 330, the outer side of the bottom plate 310 is sleeved with a sleeve plate, and the buffer plate 320 is connected to the inner side wall of the bottom plate 310 through the second elastic piece 330, so that the buffer plate 320 can be stretched and contracted towards the clamping space 500 under the action of the elastic piece. When the user places the paper roll 900 in the clamping space 500, the first clamping piece 200 and the second clamping piece 300 move towards the paper roll 900 quickly, at this time the buffer plate 320 can first contact the side surface of the paper roll 900, and buffer the clamping impact force through the second elastic piece 330, so as to reduce the damage of the clamping force to the paper roll 900. Of course, after the paper roll 900 is clamped and limited by the first clamping piece 200 and the second clamping piece 300, when subjected to external force, the elastic plate can also play a role in buffering the external force, which is beneficial to protect the integrity of the paper roll 900 and improve the smoothness of the paper running. Specifically, the second elastic piece 330 can be a spring or an elastic metal sheet or a rubber piece or a silica gel piece or other elastic structural piece.

[0056] It can be understood that, in order to further improve the buffering effect of the buffer plate 320 on the impact force, in some embodiments of the present application, the number of the second elastic pieces 330 is multiple, and the multiple second elastic pieces 330 are distributed between the buffer plate 320 and the bottom plate 310, so that the impact force received by the buffer plate 320 can be shared by the multiple second elastic pieces 330, and the uniformity of the force received by the buffer plate 320 can be improved, so that the vibration amplitude of each part of the buffer plate 320 is relatively balanced, the buffering effect of the buffer plate 320 on the impact force is improved, and the protection effect on the paper roll 900 is further improved.

[0057] Referring to Figure 5 and Figure 9 It can be understood that, in order to further improve the smoothness of the paper running, in some embodiments of the present application, the clamping assembly further comprises an abutting piece for reducing the contact area with the paper roll 900, and the abutting piece is arranged on the inner side surface of the first clamping piece 200 and / or the second clamping piece 300. When the paper roll 900 is placed in the clamping space 500, the first clamping piece 200 and the second clamping piece 300 clamp and limit the paper roll 900, and the abutting piece can reduce the contact area between the first clamping piece 200 and / or the second clamping piece 300 and the paper roll 900, so as to reduce the friction between the paper roll 900 and the first clamping piece 200 and / or the second clamping piece 300 during the paper running, and improve the smoothness of the paper running.

[0058] It can be understood that, in order to improve the convenience of processing, in some embodiments of the present application, the abutting part can be a protruding rib 340, and the protruding rib 340 is arranged vertically. Specifically, the protruding rib 340 can be integrally formed on the inner side of the first clamping part 200 and / or the second clamping part 300. For example, the first clamping part 200 and the protruding rib 340 can be integrally manufactured by injection molding, at this time the protruding rib 340 is located on the inner side of the first clamping part 200, the connection between the protruding rib 340 and the first clamping part 200 is more stable, and the manufacturing of the protruding rib 340 is also more convenient. Of course, the protruding rib 340 and the first clamping part 200 can also be separately manufactured, and then the protruding rib 340 is connected to the inner side of the first clamping part 200 by bonding or welding. It should be noted that when the paper is fed, the paper moves along the horizontal direction, so by arranging the protruding rib 340 vertically, the paper can be in contact with the protruding rib 340, thereby reducing the contact area between the paper and the first clamping part 200 and / or the second clamping part 300, reducing the friction, and improving the smoothness of the paper feeding.

[0059] It can be understood that, in order to further improve the smoothness of the paper feeding, in some embodiments of the present application, the number of protruding ribs 340 is multiple, and the multiple protruding ribs 340 are uniformly and spacedly arranged on the inner side of the first clamping part 200 and the second clamping part 300. Specifically, the inner side of the first clamping part 200 and the second clamping part 300 is provided with multiple protruding ribs 340, and the multiple protruding ribs 340 are uniformly and spacedly distributed along the horizontal direction, so that the contact area between the two sides of the paper roll 900 and the first clamping part 200 and the second clamping part 300 is smaller, which is beneficial to further reduce the friction of the paper feeding and improve the smoothness of the paper feeding.

[0060] Referring to Figures 5 to 8 It can be understood that, in order to enable the adjusting assembly 400 to effectively adjust and control the stroke of the first slider 120 or the second slider 130, in some embodiments of the present application, the adjusting assembly 400 is provided with a movable adjusting block 410, the first slider 120 or the second slider 130 is provided with a limiting block 121, and the adjusting block 410 can abut against the limiting block 121, so that the adjusting block 410 can limit the movement of the limiting block 121, thereby changing the range in which the limiting block 121 can move freely, and further changing the stroke of the first slider 120 or the second slider 130, achieving effective adjustment of the width of the clamping space 500, so that the first clamping part 200 and the second clamping part 300 can effectively clamp and limit the paper roll 900 of different widths.

[0061] It can be understood that, in order to make the adjusting block 410 move along the width direction of the clamping space 500, and improve the convenience of adjustment, in some embodiments of the present application, the adjusting assembly 400 is further provided with an adjusting rod 420, the adjusting block 410 is movably installed on the adjusting rod 420, and the adjusting rod 420 is arranged along the width direction of the clamping space 500. Therefore, when the adjusting block 410 moves along the adjusting rod 420, it can move along the width direction of the clamping space 500, so that the width of the clamping space 500 can be quickly adjusted by moving the adjusting block 410 a small distance, and the adjusting block 410 can be prevented from moving off course and failing to limit the first sliding block 120 or the second sliding block 130.

[0062] It can be understood that, in order to make the adjusting block 410 move more smoothly and achieve stepless adjustment to accommodate more paper rolls 900 of different widths, in some embodiments of the present application, the outer wall of the adjusting rod 420 is provided with external threads, the adjusting block 410 is provided with a through hole, the inner wall of the through hole is provided with internal threads, and the adjusting block 410 is threadedly connected to the outer wall of the adjusting rod 420 through the through hole. When adjusting, the adjusting rod 420 is rotated to make the adjusting block 410 move along the axial direction of the adjusting rod 420. At this time, the movement of the adjusting block 410 is more stable, and the distance of the movement of the adjusting block 410 is continuous, so that more paper rolls 900 of different widths can be limited.

[0063] It can be understood that, in order to facilitate the operation of the adjusting rod 420, in some embodiments of the present application, the adjusting assembly 400 is further provided with an adjusting hand wheel 430, and the adjusting hand wheel 430 is fixed to the end of the adjusting rod 420. When adjusting, the user can rotate the adjusting rod 420 through the adjusting hand wheel 430 to drive the adjusting block 410 to move along the axial direction of the adjusting rod 420. Of course, the outer wall of the adjusting hand wheel 430 can be provided with convex strips or concave grooves, so as to increase the friction between the adjusting hand wheel 430 and the human hand, and further improve the convenience of operation.

[0064] It can be understood that, in order to prevent the first sliding block 120 or the second sliding block 130 from moving too far and falling off the fixed seat 110, in some embodiments of the present application, the limiting block 121 is arranged on the outer wall of the first sliding block 120, the fixed seat 110 is provided with a sliding groove 111, the limiting block 121 is slidably installed in the sliding groove 111, and the end of the adjusting block 410 extends into the sliding groove 111. The sliding groove 111 can limit the movement of the limiting block 121, thereby limiting the movement range of the first sliding block 120, and preventing the first sliding block 120 from moving too far and being separated from the fixed seat 110.

[0065] It can be understood that, in order to enable the first slider 120 and the second slider 130 to smoothly realize reverse movement, in some embodiments of the present application, the base assembly 100 is further provided with a gear 140, the first slider 120 is provided with a first gear rack engaged with one side of the gear 140, and the second slider 130 is provided with a second gear rack 131 engaged with the other side of the gear 140, at this time, the first slider 120 and the second slider 130 are engaged with opposite sides of the gear 140, so that when one of the first gear rack and the second gear rack 131 moves, the other can be driven to move reversely by the gear 140. Since the first clamping piece 200 is connected to the first slider 120, and the second clamping piece 300 is connected to the second slider 130, the first clamping piece 200 and the second clamping piece 300 can also realize reverse movement, when one of them is pushed away, the other can also move reversely, thereby realizing bidirectional synchronous adjustment of the clamping width.

[0066] It can be understood that, in order to make the operation more convenient when adjusting the width of the clamping space 500, in some embodiments of the present application, the base assembly 100 is further provided with a first elastic member, the first elastic member has a tendency to make the first clamping piece 200 and the second clamping piece 300 approach each other, so that when the user pushes the first clamping piece 200 or the second clamping piece 300 to a predetermined position and then releases the first clamping piece 200 or the second clamping piece 300, the first clamping piece 200 and the second clamping piece 300 can approach each other under the action of the first elastic member, thereby realizing clamping of the paper roll 900. Of course, the first elastic member can be an elastic metal sheet or an elastic rope or a spring or other elastic structural member. It should be noted that the elastic force of the first elastic member is greater than the elastic force of the second elastic member, so as to prevent the first clamping piece and the second clamping piece from moving away from each other under the action of the elastic force of the second elastic member.

[0067] It can be understood that, in some embodiments of the present application, the first elastic member is a spring, which has good elasticity and relatively low cost and is convenient to install. The spring is arranged between the first clamping piece 200 and the second clamping piece 300, and the two ends of the spring are connected to the first clamping piece 200 and the second clamping piece 300 respectively, and the spring is in a state of elastic deformation under tension, so the spring has a tendency to pull the first clamping piece 200 and the second clamping piece 300 closer to each other. Of course, the number of springs can be set to be multiple, so as to improve the elastic force, or multiple springs can be distributed at intervals to improve the uniformity of stress at each part of the first clamping piece 200 and the second clamping piece 300.

[0068] The printer according to the second aspect of the present application comprises the paper bin mechanism according to the first aspect of the present application. The printer can be a thermal printer, for example, a wristband printer, and of course, can be other types of printers. The printer is provided with the paper bin mechanism as described above, so that the paper loading operation of the printer is more convenient, the paper loading time is reduced, the paper roll 900 is less likely to shake, the paper feeding is smoother, and the printing efficiency and quality are improved.

[0069] The above embodiments of the present application are described in detail with reference to the drawings, but the present application is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present application.

Claims

1. A paper hopper mechanism characterized by, The paper clamping limiting device comprises a base assembly, a clamping assembly and an adjusting assembly, the base assembly is provided with a fixed seat, a first sliding block and a second sliding block, the first sliding block and the second sliding block are reversibly slidably installed on the fixed seat, the clamping assembly comprises a first clamping piece and a second clamping piece, the first clamping piece is connected to the first sliding block, the second clamping piece is connected to the second sliding block and forms a clamping space for accommodating a paper roll with the first clamping piece, and the adjusting assembly is used for adjusting the width of the clamping space. The paper feeding device is located at the bottom of the clamping space and is provided with a first rolling assembly, a second rolling assembly and a third rolling assembly, the first rolling assembly and the second rolling assembly are spaced apart and are respectively supported on both sides of the paper roll along the gravity center line, the first rolling assembly and the second rolling assembly are horizontally arranged and are symmetrical relative to the gravity center line of the paper roll, the third rolling assembly is arranged on one side of the second rolling assembly in the paper feeding direction, and the position of the third rolling assembly is higher than that of the second rolling assembly, the distance between the first rolling assembly and the second rolling assembly and the distance between the second rolling assembly and the third rolling assembly are both smaller than the inner diameter of the shaft of the paper roll, and the first rolling assembly, the second rolling assembly and the third rolling assembly are all tangent to the contour line of the maximum outer circle of the paper roll. The first rolling assembly, the second rolling assembly and the third rolling assembly are the same in structure and all comprise a paper feeding shaft and a shaft sleeve, and the shaft sleeve is rotatably sleeved on the outer wall of the paper feeding shaft.

2. A paper hopper mechanism according to claim 1, wherein, The first clamping piece and / or the second clamping piece is provided with a bottom plate, a buffer plate and a second elastic piece, and the buffer plate is connected to the inner side wall of the bottom plate through the second elastic piece.

3. A paper hopper mechanism according to either of claims 1 or 2, wherein, The number of the second elastic pieces is multiple, and the multiple second elastic pieces are distributed between the buffer plate and the bottom plate.

4. A paper hopper mechanism according to claim 3, wherein, The clamping assembly further comprises an abutting piece for reducing the contact area with the paper roll, and the abutting piece is arranged on the inner side surface of the first clamping piece and / or the second clamping piece.

5. A paper hopper mechanism according to claim 1 wherein, The abutting piece is a protruding rib, and the protruding rib is arranged vertically.

6. A paper hopper mechanism according to claim 5, wherein, The number of the protruding ribs is multiple, and the multiple protruding ribs are uniformly and spacedly arranged on the inner side surface of the first clamping piece and the second clamping piece.

7. A paper hopper mechanism according to claim 6, wherein, The paper bin mechanism comprises the paper clamping limiting device as claimed in any one of claims 1 to 7.

8. Printer, characterized in that ​

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