Paper roll limiting device and printer comprising same

Abstract

The paper roll limiting device comprises two paper limiting sheets, and the two paper limiting sheets are arranged on the left side and the right side of the interior of a paper bin respectively and used for clamping a paper roll. The two paper limiting pieces each comprise a clamping plate and an operation plate, the clamping plates and the operation plates are connected through bent plates, and the bent plates enable the clamping plates and the operation plates to form receding positions used for receding paper rolls to be formed between the clamping plates and the operation plates. The technical scheme has the advantages that deformation is not prone to occurring, the paper roll can be clamped, the paper roll is centered, and the printing effect is guaranteed.

Description

Technical Field

[0001] The present application relates to the technical field of printers, and in particular to a paper roll limiting device and a printer containing the same. Background Art

[0002] Small portable printers, such as thermal printers, use a roll of printing paper. A paper limiter is provided in the paper bin of the printer to limit the paper roll so that it can be aligned in the center as much as possible to facilitate printing.

[0003] However, the existing paper limiter structure is a whole flat structure in contact with the end surface of the paper roll, and forms a large area of ​​contact with the paper roll. When the user pinches the paper limiter to adjust the distance between the two paper limiters, the force of manual operation is difficult to control, and it is easy to apply force to the paper roll through the paper limiter, causing the end of the paper roll to deform, thereby affecting the printing effect. Utility Model Content

[0004] In view of the above-mentioned deficiencies in the prior art, the present application provides a paper roll limiting device which is not easily deformed and can clamp the paper roll so that the paper roll is centered to ensure the printing effect.

[0005] In order to solve the above-mentioned technical problems, the technical solution adopted in the present application is: a paper roll limiting device, which includes two paper limiting plates, and the two paper limiting plates are respectively arranged on the left and right sides inside the paper bin for clamping the paper roll; the two paper limiting plates each include a clamping plate and an operating plate, and the clamping plate and the operating plate are connected to each other through a bending plate, and the bending plate forms an avoidance space between the clamping plate and the operating plate for avoiding the paper roll.

[0006] With the above structure, when the paper roll needs to be loaded between the two paper limiting sheets, since the paper limiting sheet of the present application is a paper limiting sheet with a bending structure, the surface of the operating plate close to the paper roll side is staggered with the surface of the corresponding clamping plate, thereby forming an avoidance position between the two. When adjusting the spacing between the two paper limiting sheets, the end face of the paper roll will not contact the inner surface of the operating plate, thereby not causing the end of the paper roll to deform and affect subsequent printing; moreover, the paper limiting sheet of the present application divides the entire paper limiting sheet structure into three parts, and only the clamping plate part directly contacts the paper roll, thereby reducing the contact area between the paper limiting sheet and the paper roll, thereby reducing the possibility of deformation of the paper limiting sheet, so that the clamping plate can achieve a tighter clamping force on the paper roll, and the paper roll is not easily displaced, thereby keeping the paper roll centered, thereby improving the stability of printing.

[0007] Furthermore, a force-applying groove is provided on the outer surface of the operating plate away from the paper roll. This structure facilitates force application and operation when assembling and disassembling the paper limiter and adjusting the distance between the two paper limiters.

[0008] Further, the clamping plate is located inside the paper bin, and the operation plate extends outside the paper bin. With this structure, the external operation plate is more conducive to operating the paper limiting piece, while the clamping plate is inside the paper bin, not easily affected by external forces, and can also abut against the inside of the paper bin, reducing the risk of deformation of the clamping plate.

[0009] Further, the bending plate is L-shaped, with one end connected to the clamping plate and the other end connected to the operation plate, so that the clamping plate and the operation plate are arranged parallel to each other, and the operation plate retreats away from the cardboard relative to the clamping plate to form an avoidance space. With this structure of the bending plate, the clamping plate and the operation plate can be kept parallel to each other in the vertical direction, and in the horizontal direction, the operation plate retreats relative to the clamping plate, that is, it is closer to the two ends of the paper bin in the horizontal direction, so that the two are misaligned in the horizontal direction to form an avoidance space. In this way, when adjusting the limiting piece, it is not easy to cause deformation of the end of the paper roll and affect its printing effect.

[0010] Further, a connecting portion extends from the clamping plate, and the connecting portion is used to connect to the clamping structure, and the clamping structure is closer to the movement side of the printer. With this structure, when the movement operates for printing, since the clamping structure is closer to the movement side, the clamping position of the clamping structure for clamping the paper limiting piece is also closer to the movement side. In this way, the paper roll on the movement side can be clamped more tightly, not easily displaced, and the paper roll can be kept centered.

[0011] Furthermore, the clamping structure includes a first rack and a second rack respectively connected to two paper limiting pieces, the first rack and the second rack are both engaged with a damping gear, and the damping gear is connected to a positioning post of the paper bin. With this structure, after the paper roll is placed in the paper bin, manually adjust the distance between the two paper limiting pieces to fit the paper roll according to the length of the paper roll to clamp the paper roll. During the adjustment process, the first rack and the second rack both move left and right synchronously or in opposite directions relative to the damping gear, so that the paper roll is kept in the centered position. And the damping gear can exert a damping effect, and it is not easy to change after the distance is adjusted.

[0012] Furthermore, the first rack and the second rack are engaged on the upper and lower sides of the damping gear, and the damping gear is located at the center position in the width direction of the paper bin. With this structure, the two paper limiting pieces can be driven to move relative to each other simultaneously by the first rack and the second rack to keep the paper roll in the centered position.

[0013] Furthermore, the clamping structure is close to the paper outlet side of the paper roll. With this structure, the paper outlet is close to the rack structure, which is beneficial to the centering effect of the paper roll.

[0014] The present application also provides a printer, which includes the paper roll limiting device described above in the present application. By adopting the paper roll limiting device described above in the present application, the limiting paper sheet is not prone to deformation, can maintain sufficient clamping force on the paper roll, will not cause displacement of the paper roll, and can make the paper roll in the printer located at the center position, thus maintaining the stability of printing. Description of the Drawings

[0015] Figure 1 Structural schematic diagram of the paper roll limiting device of the present application.

[0016] Figure 2 Structural schematic diagram of the first view of the limiting paper sheet of the present application.

[0017] Figure 3 Structural schematic diagram of the second view of the limiting paper sheet of the present application.

[0018] Figure 4 Structural schematic diagram of the connection between the limiting paper sheet and the clamping structure of the present application.

[0019] Figure 5 Structural schematic diagram of the paper roll loaded in the paper bin of the present application.

[0020] Figure 6 Structural schematic diagram of the explosion view formed by the paper bin, the limiting paper sheet and the clamping structure of the present application.

[0021] Figure 7 Structural schematic diagram of the paper bin installed in the lower housing of the printer of the present application.

[0022] Figure 8 Structural schematic diagram of the printer of the present application with a part of the upper housing removed.

[0023] Figure 9 Structural schematic diagram of the printer of the present application.

[0024] As shown in the drawings: a. clamping structure, 1. limiting paper sheet, 101. clamping plate, 102. operation plate, 103. bending plate, 104. force application groove, 105. reinforcing rib, 106. connecting part, 2. paper bin, 201. positioning column, 202. sliding groove, 3. paper roll, 4. movement mechanism, 5. first rack, 6. second rack, 7. damping gear, 8. paper outlet, 9. rubber roller, 10. lower housing, 11. upper housing. Detailed Embodiments

[0025] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the embodiments and the drawings. Obviously, the described embodiments are only preferred embodiments, rather than all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention;

[0026] It should also be noted that when a component is referred to as being "fixed to" another component, it may be directly on the other component or there may also be another intermediate component, fixed through the intermediate component. When a component is considered to be "connected" to another component, it may be directly connected to the other component or there may be another intermediate component at the same time. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be another intermediate component at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only. Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by technicians in the technical field of the present invention. The terms used in the specification of the present invention herein are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0027] As attached Figures 1-8 As shown, a paper roll limiting device of the present application is provided, and the device includes two paper limiting sheets 1, and the two paper limiting sheets 1 are respectively arranged on the left and right sides inside the paper bin 2 for clamping the paper roll 3; the two paper limiting sheets 1 each include a clamping plate 101 and an operating plate 102, and the clamping plate 101 and the operating plate 102 are connected to each other through a bending plate 103, and the bending plate 103 forms an avoidance position for avoiding the paper roll 3 between the clamping plate 101 and the operating plate 102; specifically, the two paper limiting sheets 1 of the present application are respectively arranged on both sides of the width direction inside the paper bin for clamping the limiting paper roll; and the paper limiting sheet 1 includes the clamping plate 101, the operating plate 102 and the bending plate 103, which can make the clamping plate 101 and the operating plate 102 on the side facing the paper roll form an up-and-down displacement, and the side of the operating plate 102 facing the paper roll is closer to the two outer ends in the width direction of the paper bin, thereby forming an avoidance position.

[0028] With the above structure, when the paper roll needs to be loaded between the two paper limiting sheets, since the paper limiting sheet of the present application is a paper limiting sheet with a bending structure, the surface of the operating plate close to the paper roll side is staggered with the surface of the corresponding clamping plate, thereby forming an avoidance position between the two. When adjusting the spacing between the two paper limiting sheets, the end face of the paper roll will not contact the inner surface of the operating plate, thereby not causing the end of the paper roll to deform and affect subsequent printing; moreover, the paper limiting sheet of the present application is divided into three parts, and only the clamping plate part is directly in contact with the paper roll, which reduces the contact area between the paper limiting sheet and the paper roll, thereby reducing the possibility of deformation of the paper limiting sheet, so that the clamping plate can achieve a tighter clamping force on the paper roll, and the paper roll is not easily displaced, thereby keeping the paper roll centered, thereby improving the stability of printing.

[0029] As attachedFigures 2-3 As shown in the figure, a groove 104 is provided on the outer surface of the operation board 102 away from the side of the paper roll 3. Specifically, a groove structure recessed toward the side of the paper roll 3 is provided on the operation board 102, so that it is convenient for the user to manually place the fingers at the groove 104 to apply force to adjust the distance between the two paper limit pieces, and the operation is convenient.

[0030] As attached Figure 1 As shown in the figure, the clamping board 101 described in the present application is located in the paper bin 2, and the operation board 102 extends outside the paper bin 2. That is, the clamping board is completely located inside the accommodating space of the paper bin, while the operation board extends beyond the upper edge of the paper bin. With this structure, the external operation board is more conducive to the operation of the paper limit pieces, and the clamping board is located inside the paper bin, not easily affected by external forces, and can also abut against the inside of the paper bin to reduce the risk of deformation of the clamping board.

[0031] As attached Figures 2-3 As shown in the figure, the bending board 103 described in the present application is L-shaped, one end thereof, i.e., the lower end of the bending board 103, is connected to the clamping board 101, and the other end thereof, i.e., the upper end of the bending board 103, is connected to the operation board 102, so that the clamping board 101 and the operation board 102 are arranged parallel to each other, and the operation board 102 retreats to the side away from the cardboard relative to the clamping board 101 to form a clearance position. With the bending board of this structure, in the vertical direction, the clamping board and the operation board can be kept parallel to each other, and in the horizontal direction, the operation board retreats relative to the clamping board, that is, the operation board is closer to the two ends of the paper bin in the horizontal direction, so that the two are misaligned in the horizontal direction to form a clearance position. In this way, when adjusting the limiting piece, it is not easy to cause deformation of the end of the paper roll and affect its printing effect.

[0032] As attached Figure 3 As shown in the figure, reinforcing ribs 105 are provided on the outer side surface of the clamping board 101 away from the side of the paper roll 3, that is, a plurality of protruding rib structures are provided on the back of the clamping board. With this structure, the anti-deformation ability of the clamping board can be further enhanced, and deformation during loading of the roll paper can be avoided, so that the paper roll cannot be clamped tightly.

[0033] As attached Figures 1-4 and Figure 6 As shown in the figure, the extending lengths of the operation board 102 and the bending board 103 along the direction perpendicular to the axial direction of the paper roll 3 are less than the extending length of the corresponding clamping board 101. That is, the operation board and the bending board are not of the same length as the upper edge of the clamping board, but shorter than the upper edge thereof. With this structure, the overall occupied space and material consumption of the paper limit pieces can be further saved.

[0034] As an example, the operation board 102, the bending board 103 and the clamping board 101 described in the present application are integrally provided, that is, the whole paper limiting piece can be integrally prepared from a hard plastic material or other metal materials; adopting this structure can improve the strength of the whole paper limiting piece and also reduce the deformation risk of the whole paper limiting piece.

[0035] As shown in the Figures 2-4 and Figure 6 figures, a connecting portion 106 extends on the clamping board 101 described in the present application. The connecting portion 106 is used to connect with a clamping structure a, and the clamping structure a is close to the movement 4 side of the printer; specifically, the connecting portion 106 is close to the bottom end position of the clamping board 101, and then extends out of the chute 202 at the bottom of the paper bin 2. As shown in Figures 2-3 Figures 4 and 5, the connecting portion can be a convex block structure arranged at intervals. The convex block is transversely provided with a threaded hole, and the corresponding clamping structure is also provided with a matching convex block structure, and then they are connected to each other by bolts or screws; adopting this structure, when the movement runs for printing, since the clamping structure is closer to the movement side, the clamping position where the clamping structure clamps the paper limiting piece is also closer to the movement side, so that the paper roll on the movement side can be clamped more tightly, is not easy to displace, and keeps the paper roll centered; the clamping structure is close to the movement side of the printer, that is, the clamping structure is located below the movement, rather than on the other side of the movement along the radial direction of the paper roll. If it is located on the other side, it will cause the clamping structure and the movement to be far apart from each other, at the opposite ends. In this way, the force application and clamping positions of the clamping structure on the two paper limiting pieces are also far from the movement side, which is easy to cause the two paper limiting pieces to form an elastic wall, so that the two paper limiting pieces close to the movement side expand outward from each other, cannot clamp the paper roll tightly, and the paper roll is easy to displace and deviate, and is not easy to be centered, resulting in an unsatisfactory printing effect.

[0036] As shown in the Figure 4 , Figure 5 and Figure 6As shown in the figure, the clamping structure a described in the present application includes a first rack 5 and a second rack 6 respectively connected to two paper limit sheets 1. The first rack 5 and the second rack 6 are both engaged with a damping gear 7, and the damping gear 7 is connected to a positioning post 201 of the paper bin 2. Specifically, two outwardly protruding positioning posts are provided on the outer side wall of the paper bin, and positioning holes connected to the positioning posts are provided at both ends of the damping gear in the length direction, so as to connect the damping gear with the paper bin. The first rack and the second rack are provided with a plurality of meshing teeth along the length direction, which mesh with the teeth on the damping gear. The two racks can move back and forth relative to the damping gear, and a convex block structure adapted to the convex block of the connecting portion of the paper limit sheet is provided at the connecting end of the two racks, and the connection is realized through a threaded hole and a bolt. With this structure, after the paper roll is placed in the paper bin, the distance between the two paper limit sheets is manually adjusted according to the length of the paper roll to fit the paper roll, so as to clamp the paper roll. During the adjustment process, the first rack and the second rack both move synchronously or in opposite directions relative to the damping gear left and right, so that the paper roll remains in the center position. The damping gear can exert a damping effect, and it is not easy to change after the distance is adjusted well.

[0037] As shown in the attached Figure 4 、 Figure 5 and Figure 6 figures, the first rack 5 and the second rack 6 described in the present application are engaged on the upper and lower sides of the damping gear 7, and the damping gear 7 is located at the center position in the width direction of the paper bin 2. Specifically, the first rack 5 and the second rack 6 are respectively provided at the opposite ends above and below the damping gear, and the meshing teeth on the two racks are all placed on the inner surface to mesh with the damping gear. The damping gear can adopt a commercially available conventional damping gear that meets the needs of the present application. With this structure, the two paper limit sheets can be driven to run relative to each other through the first rack and the second rack, so as to keep the paper roll in the center position.

[0038] As shown in the attached Figures 8-9 figures, the clamping structure a described in the present application is close to the paper outlet 8 side of the paper roll 3. Specifically, the paper outlet of the present application is located on the upper housing 11 of the printer and on the same side as the movement mechanism and the clamping structure. With this structure, the paper outlet is close to the rack structure, which is beneficial to the centering effect of the paper roll.

[0039] As shown in the attached Figures 8-9 figures, the present application also provides a printer, which contains the paper roll limiting device described above in the present application. By adopting the paper roll limiting device described above in the present application, the paper limit sheet is not easy to deform, can maintain sufficient clamping force on the paper roll, will not cause the paper roll to displace, can make the paper roll in the printer located in the center position, and maintain the stability of printing.

[0040] The specific working principle and process of the paper roll limiting device of the present application are as follows: According to Figure 6As shown, two limit paper sheets and a clamping structure of the present application are assembled onto the paper bin. Specifically, a card slot for accommodating the limit paper sheets is provided inside the paper bin. Then, the clamping plate of the limit paper sheet is installed into the card slot, and the operation plate is located outside the paper bin for convenient application of force. After its connecting portion passes through the chute near the bottom of the paper bin, it is connected to two racks by bolts. The damping gear is connected to the outer side wall of the paper bin by a positioning pin, and the two racks are simultaneously meshed with the damping gear. The assembled paper bin as a whole is installed into the lower housing 10 of the printer, and they can be locked to each other by screws. Then, the movement mechanism is locked to the lower housing 10, the paper roll is placed into the paper bin, the rubber roller 9 of the printer is clamped into the movement mechanism, and the upper housing 11 of the printer is covered. When the printer is started, the paper is driven by the movement mechanism to perform the printing function. The above movement mechanism, rubber roller, and other necessary structures of the printer can all adopt the conventional structures of existing thermal printers, which are not the innovation points of the present application and will not be elaborated in detail again. During the operation process, the two symmetrical first and second racks are connected together by the damping gear. When assembling the roll paper, due to the bent limit paper sheet structure forming an avoidance space, the paper roll will not contact the operation plate during assembly, and it is not easy to cause deformation of the paper roll and the clamping plate. When the two limit paper sheets are manually adjusted to move inward, there is an effect of centering positioning. The force applied by the hand to the limit paper sheet should be at the force application groove part on the upper side of the limit paper sheet. During the inward movement, the bent limit paper sheet can enhance the strength of the limit paper sheet, reduce the deformation point where the limit paper sheet first contacts the paper roll, and it is not easy to deform. Moreover, both the movement mechanism and the paper outlet are located on the near side of the clamping structure, so that the paper roll at the paper outlet position is effectively clamped, easier to be centered, and the printing is stable.

Claims

1. A paper roll limiting device, comprising two paper limiting pieces (1), wherein the two paper limiting pieces (1) are respectively arranged on the left and right sides of a paper bin (2) for clamping a paper roll (3), characterized in that: The two paper limiting sheets (1) each comprise a clamping plate (101) and an operating plate (102); the clamping plate (101) and the operating plate (102) are connected to each other via a bending plate (103); the bending plate (103) forms a clearance space between the clamping plate (101) and the operating plate (102) for avoiding the paper roll (3).

2. The paper roll limiting device according to claim 1, characterized in that: The outer surface of the operating plate (102) away from the paper roll (3) is provided with a force-applying groove (104).

3. The paper roll limiting device according to claim 1, characterized in that: The clamping plate (101) is located inside the paper bin (2), and the operating plate (102) extends outside the paper bin (2).

4. The paper roll limiting device according to claim 1, characterized in that: The bending plate (103) is L-shaped, one end of which is connected to the clamping plate (101), and the other end of which is connected to the operating plate (102), so that the clamping plate (101) and the operating plate (102) are arranged parallel to each other, and the operating plate (102) retreats to a side away from the paperboard relative to the clamping plate (101) to form an avoidance position.

5. The paper roll limiting device according to claim 1, characterized in that: A connecting portion (106) extends from the clamping plate (101), and the connecting portion (106) is used to be connected to the clamping structure (a), and the clamping structure (a) is close to the movement (4) side of the printer.

6. The paper roll limiting device according to claim 5, characterized in that: The clamping structure (a) comprises a first rack (5) and a second rack (6) respectively connected to the two paper limiting sheets (1); the first rack (5) and the second rack (6) are both meshed with a damping gear (7); and the damping gear (7) is connected to a positioning column (201) of the paper bin (2).

7. The paper roll limiting device according to claim 6, characterized in that: The first rack (5) and the second rack (6) are meshed with the upper and lower sides of the damping gear (7), and the damping gear (7) is located in the center of the paper bin (2) in the width direction.

8. The paper roll limiting device according to claim 6, characterized in that: The clamping structure (a) is close to the paper outlet (8) side of the paper roll (3).

9. A printer, characterized in that: The printer comprises the paper roll limiting device according to any one of claims 1 to 8.

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