Paper clamping mechanism and label printer

Abstract

The paper clamping mechanism comprises a mounting base, a sliding assembly and a paper clamping plate, the mounting base is provided with a paper bin used for containing a printing paper roll, and the paper bin is provided with a bottom wall and a side wall connected with the bottom wall; the sliding assembly comprises a sliding piece arranged on the mounting base in a sliding mode in the first direction, and the first direction is parallel to the central axis of a printing paper roll contained in the paper bin. The paper clamping plate is provided with a bottom end face and a side end face connected with the bottom end face, the bottom end face faces the bottom wall, and the side end face faces the side wall; wherein the paper clamping plate is provided with a stirring area for a user to stir the paper clamping plate, the side end face is provided with a connecting part connected with the sliding piece, and the distance from the stirring area to the connecting part is smaller than the distance from the stirring area to the bottom wall. The problem that the position adjusting process of the paper clamping plate is not smooth, and consequently the use experience of a user is poor can be solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of label printing, and particularly relates to a paper clamping mechanism and a label printer. BACKGROUND

[0002] In the related art, a label printer is provided with a paper bin and a paper clamping plate. When in use, the paper clamping plate is used to clamp and fix a printing paper roll in the paper bin. When the printing paper roll is replaced, the position of the paper clamping plate needs to be adjusted so as to facilitate the printing paper roll to enter or exit the paper bin.

[0003] However, the position adjustment process of the paper clamping plate of the current label printer is not smooth, which leads to poor user experience. CONTENT OF THE UTILITY MODEL

[0004] Embodiments of the present application provide a paper clamping mechanism and a label printer, which are used to improve the problem that the position adjustment process of the paper clamping plate in the related art is not smooth, which leads to poor user experience.

[0005] In a first aspect, the embodiments of the present application provide a paper clamping mechanism, comprising a mounting seat, a sliding assembly and a paper clamping plate. The mounting seat is provided with a paper bin for accommodating a printing paper roll. The paper bin has a bottom wall and a side wall connected with the bottom wall. The sliding assembly comprises a sliding piece arranged in the mounting seat in a first direction. The first direction is parallel to the central axis of the printing paper roll accommodated in the paper bin. The paper clamping plate has a bottom end surface and a side end surface connected with the bottom end surface. The bottom end surface is arranged towards the bottom wall, and the side end surface is arranged towards the side wall. The paper clamping plate has a dialing area for a user to dial the paper clamping plate. The side end surface has a connecting part connected with the sliding piece. The distance from the dialing area to the connecting part is less than the distance from the dialing area to the bottom wall.

[0006] In some embodiments, the connecting part has a first center point, the bottom end surface has a second center point, and the dialing area has a third center point. The ratio of the distance between the first center point and the third center point to the distance between the second center point and the third center point is greater than 0 and less than 2 / 3. In some embodiments, the orthogonal projection of the first center point on the plane where the bottom end surface is located is located between the orthogonal projection of the second center point on the plane where the bottom end surface is located and the orthogonal projection of the third center point on the plane where the bottom end surface is located.

[0007] In some embodiments, the paper clamping plate comprises a paper clamping body for clamping a printing paper roll and a handle for pushing the paper clamping body, the handle is connected to one side of the paper clamping body along a second direction intersecting the first direction; the pushing area is arranged on the handle; the width of the handle gradually increases in the direction close to the paper clamping body, and the width direction of the handle is perpendicular to the bottom end surface.

[0008] In some embodiments, the paper clamping body has a fourth center point located on the central axis of the printing paper roll accommodated in the paper bin; the distance between the first center point and the third center point is smaller than the distance between the fourth center point and the third center point.

[0009] In some embodiments, the sliding assembly further comprises a guide connected to the mounting seat and extending along the first direction, and the sliding member is slidingly arranged on the guide.

[0010] In some embodiments, the mounting seat is further provided with a mounting space, and the mounting seat is provided with a sliding groove communicating the paper bin and the mounting space; the guide is arranged in the mounting space, and the sliding member passes through the sliding groove and is slidingly connected with the guide.

[0011] In some embodiments, the sliding member is arranged in a spaced manner with the groove wall of the sliding groove.

[0012] In some embodiments, the side end surface and the side wall opposite thereto are arranged in a spaced manner.

[0013] In some embodiments, the distance between the side end surface and the side wall is 0.5mm-3mm.

[0014] In some embodiments, the mounting seat is provided with a limiting groove extending along the first direction, and the paper clamping plate is provided with a limiting protrusion, the limiting protrusion is slidingly embedded in the limiting groove.

[0015] In some embodiments, the limiting groove is arranged on the bottom wall.

[0016] In some embodiments, the pushing area extends from the top of the paper clamping plate towards the connecting part. In some embodiments, the number of the paper clamping plate and the sliding member is two, the sliding assembly further comprises a gear and two oppositely arranged racks, the two racks are respectively connected with the two sliding members, the gear is engaged with the two racks at the same time, and the movement directions of the two racks are opposite.

[0017] In some embodiments, the sliding assembly further comprises a first elastic reset member, one end of the first elastic reset member is connected to the mounting seat, and the other end is connected to one of the sliding members, the first elastic reset member is configured to elastically deform in the first direction when the external force is lost, so as to drive the corresponding sliding member and the paper clamping plate connected thereto to move back in the first direction; and / or, the sliding assembly further comprises a second elastic reset member, one end of the second elastic reset member is connected to the mounting seat, and the other end is connected to one of the sliding members, the second elastic reset member is configured to elastically deform in the second direction when the external force is lost, so as to drive the corresponding sliding member and the paper clamping plate connected thereto to move back in the second direction.

[0018] In a second aspect, the embodiments of the present application provide a label printer, comprising the paper clamping mechanism and a printing mechanism connected with the paper clamping mechanism.

[0019] The paper clamping mechanism of the embodiments of the present application connects the paper clamping plate to the mounting seat through the sliding member, so that the paper clamping plate can reciprocate in the first direction following the sliding of the sliding member, thereby facilitating the adjustment of the position of the paper clamping plate when it is necessary to take or place the printing paper roll. On this basis, the shape of the paper clamping plate is designed, the paper clamping plate is provided with a connected bottom end surface and side end surface, the bottom end surface faces the bottom wall of the paper bin, the side end surface faces the side wall of the paper bin, a pushing area for pushing the paper clamping plate is arranged on the paper clamping plate, a connecting portion connected with the sliding member is arranged on the side end surface, and the distance from the pushing area to the connecting portion is set to be less than the distance from the pushing area to the bottom wall. When the paper clamping plate is pushed, the distance between the force application area and the connecting portion is close, the force arm is short, and the deformation degree of the paper clamping plate is reduced, thereby improving the smoothness of the position adjustment of the paper clamping plate and further improving the user experience. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0021] Figure 1 A structural schematic diagram of a paper clamping mechanism in an embodiment of the present application is shown.

[0022] Figure 2 A structural schematic diagram of a paper clamping mechanism in an embodiment of the present application is shown. Figure 1 A local enlarged view of position I in FIG.

[0023] Figure 3 A structural schematic diagram of a paper clamping plate in an embodiment of the present application is shown.

[0024] Figure 4 Fig. 3 shows a structural schematic view of another perspective of the paper clamping mechanism in an embodiment of the present application.

[0025] Figure 5 Fig. 4 shows a structural schematic view of the paper clamping mechanism in an embodiment of the present application. Figure 4 Fig. 5 shows a partial enlarged view of II in Fig. 4.

[0026] Legend of reference signs:

[0027] 1. paper clamping mechanism

[0028] 10. mounting seat; 11. paper bin; 111. bottom wall; 112. side wall; 12. mounting space; 13. chute;

[0029] 20. sliding assembly; 21. sliding piece; 22. guide piece; 23. gear; 24. rack; 25. first elastic return member; 26. second elastic return member;

[0030] 30. paper clamping plate; 30a. paper clamping main body; 30b. handle; 31. bottom end face; 32. side end face; 33. connecting part; 34. actuating area; 35. limiting protrusion; 36. bottom extension; 37. side extension; 38. limiting protruding part;

[0031] A. first center point; B. second center point; C. third center point; D. fourth center point; X. first direction; Y. second direction. DETAILED DESCRIPTION

[0032] In order to make the objects, technical solutions and advantages of the present application clearer, the following will further describe the embodiments of the present application with reference to the accompanying drawings.

[0033] The following description refers to the accompanying drawings. Unless otherwise indicated, like numbers in the various drawings of the accompanying drawings denote like or similar elements. The following detailed description does not provide design limitations to the inventive aspects of the application. The inventive aspects are limited only by the claims.

[0034] In the related art, a label printer is provided with a paper bin and a paper clamping plate. In use, the paper clamping plate clamps and fixes a paper roll in the paper bin. When the paper roll is replaced, the position of the paper clamping plate needs to be adjusted so that the paper roll can be put into or taken out of the paper bin. However, the position adjustment process of the paper clamping plate of the current label printer is not smooth, which results in poor user experience.

[0035] To solve the above problems, the application provides a paper clamping mechanism, which comprises a mounting seat, a sliding assembly and a paper clamping plate. The paper clamping plate is slidably connected to the mounting seat through the sliding assembly, so that the paper clamping plate can move smoothly along the sliding direction. On this basis, the shape of the paper clamping plate is further designed. The paper clamping plate is provided with a connected bottom end surface and side end surface. The bottom end surface faces the bottom wall of the paper bin, and the side end surface faces the side wall of the paper bin. A pushing area for pushing the paper clamping plate is arranged on the paper clamping plate. A connecting part connected with the sliding part is arranged on the side end surface. The distance from the pushing area to the connecting part is set to be less than the distance from the pushing area to the bottom wall. When the paper clamping plate is pushed, the distance between the force application area and the connecting part is close, the force arm is short, and the deformation degree of the paper clamping plate is reduced, so that the smoothness of the position adjustment of the paper clamping plate is improved, and the user experience is improved.

[0036] Referring to Figure 1 and Figure 2 An embodiment of the application provides a paper clamping mechanism 1, which comprises a mounting seat 10, a sliding assembly 20 and a paper clamping plate 30.

[0037] The mounting seat 10 is provided with a paper bin 11 for accommodating a printing paper roll. The paper bin 11 has a bottom wall 111 and a side wall 112 connected to the bottom wall 111. The shape of the paper bin 11 is the same as or different from that of the printing paper roll. For example, the shape of the printing paper roll is cylindrical, the shape of the paper bin 11 is the same as that of the printing paper roll, the shape of the bottom wall 111 is a curved surface matched with the shape of the printing paper roll, and one end of the side wall 112 is connected to the bottom wall 111 and the other end extends away from the bottom wall 111. For another example, the shape of the printing paper roll is cylindrical, the shape of the paper bin 11 is different from that of the printing paper roll, the shape of the bottom wall 111 is a plane, and one end of the side wall 112 is connected to the bottom wall 111 and the other end extends away from the bottom wall 111.

[0038] The sliding assembly 20 comprises a sliding part 21 slidably arranged on the mounting seat 10 along a first direction X, which is parallel to the central axis of the printing paper roll accommodated in the paper bin 11. For example, the sliding part 21 is a sliding block, a sliding rod or a sliding column.

[0039] In combination with Figure 1 and Figure 3The paper clamping plate 30 has a bottom end surface 31 and a side end surface 32 connected with the bottom end surface 31, the bottom end surface 31 is arranged towards the bottom wall 111, and the side end surface 32 is arranged towards the side wall 112. The paper clamping plate 30 has a pushing area 34 for a user to push the paper clamping plate 30, the side end surface 32 has a connecting part 33 connected with the sliding piece 21, and the distance between the pushing area 34 and the connecting part 33 is smaller than the distance between the pushing area 34 and the bottom wall 111. In this way, when the paper clamping plate 30 is pushed, the distance between the force application area and the connecting part 33 is relatively short, the force arm is relatively short, the deformation degree of the paper clamping plate 30 is reduced, the position adjustment smoothness of the paper clamping plate 30 is improved, and the user experience is improved.

[0040] Optionally, the bottom end surface 31 of the paper clamping plate 30 is shaped to match the shape of the bottom wall 111 of the paper bin 11, and the side end surface 32 of the paper clamping plate 30 is shaped to match the shape of the side wall 112 of the paper bin 11. In this way, the space utilization in the paper bin 11 can be improved while ensuring the smooth sliding of the paper clamping plate 30, so as to reduce the size of the paper clamping mechanism 1. Optionally, the number of paper clamping plates 30 is two, the two paper clamping plates 30 are arranged at intervals along the first direction X, and a clamping space is formed between the two paper clamping plates 30. The two paper clamping plates 30 are slidably connected to the mounting seat 10 along the first direction X, and the sliding directions of the two paper clamping plates 30 are opposite. In this way, the adjustment of the clamping space between the two paper clamping plates 30 is more flexible.

[0041] Optionally, the surface of the paper clamping plate 30 facing the clamping space is provided with a limiting protrusion 38, the limiting protrusion 38 is used to abut against the end wall of the printing paper roll, or the limiting protrusion 38 extends into the hollow part of the printing paper roll to limit the printing paper roll, so that the clamping of the printing paper roll is more stable.

[0042] Optionally, the number of paper clamping plates 30 is one, and the paper clamping plate 30 cooperates with the end wall of the paper bin 11 to clamp the printing paper roll, so as to simplify the structure of the paper clamping mechanism 1.

[0043] Referring to Figure 3 In some embodiments, the connecting part 33 has a first center point A, the bottom end surface 31 has a second center point B, and the pushing area 34 has a third center point C. The ratio of the distance between the first center point A and the third center point C to the distance between the second center point B and the third center point C is greater than 0 and less than 2 / 3. For example, the ratio of the distance between the first center point A and the third center point C to the distance between the second center point B and the third center point C is 1 / 3 or 1 / 2. In this way, when the paper clamping plate 30 is pushed, the distance between the force application area and the connecting part 33 is relatively short, the force arm is relatively short, the deformation degree of the paper clamping plate 30 is reduced, the position adjustment smoothness of the paper clamping plate 30 is improved, and the user experience is improved.

[0044] In some embodiments, the first center point A is located between the projection of the second center point B on the plane of the bottom end surface 31 and the projection of the third center point C on the plane of the bottom end surface 31. In other words, the first center point A, the second center point B and the third center point C form an obtuse triangle, and the dialing area 34 is located above the side of the bottom end surface 31, thereby occupying less longitudinal space.

[0045] In other embodiments, the third center point C is located between the projection of the second center point B on the plane of the bottom end surface 31 and the projection of the first center point A on the plane of the bottom end surface 31. In other words, the first center point A, the second center point B and the third center point C form an acute triangle, and the dialing area 34 is located above the bottom end surface 31, thereby occupying less lateral space.

[0046] Continuing to refer to Figure 3 In some embodiments, the paper clamping plate 30 includes a paper clamping body 30a for clamping the print paper roll and a handle 30b for dialing the paper clamping body 30a, the handle 30b being connected to one side of the paper clamping body 30a along a second direction Y intersecting, for example, perpendicular to the first direction X. The dialing area 34 is provided on the handle 30b. The handle 30b gradually increases in width in a direction close to the paper clamping body 30a, and the width direction of the handle 30b is perpendicular to the bottom end surface 31. In this way, the connection part 33 between the handle 30b and the paper clamping body 30a has high structural strength and is not easily deformed and damaged. Moreover, due to the gradual increase in width, the connection part 33 between the handle 30b and the paper clamping body 30a is smoothly transitioned, thereby improving the user experience.

[0047] Optionally, one side of the paper clamping body 30a facing the side wall 112 of the paper cassette 11 is provided with a side extension 37, one end of the side extension 37 being connected to the paper clamping body 30a and the other end extending towards the side wall 112 of the paper cassette 11. The side end surface 32 is located on the side of the side extension 37 facing the side wall 112 of the paper cassette 11, i.e. the connection part 33 is located on the side of the extension facing the side wall 112 of the paper cassette 11. In this way, the connection part 33 is not directly connected to the paper clamping body 30a, avoiding interference with the clamping space.

[0048] In some embodiments, the paper clamping body 30a has a fourth center point D located on the central axis of the printing paper roll accommodated in the paper tank 11. The distance between the first center point A and the third center point C is smaller than the distance between the fourth center point D and the third center point C. In this way, the force arm between the connecting portion 33 and the pushing area 34 is shorter than the force arm between the paper clamping body 30a and the pushing area 34, so as to reduce the deformation degree in the pushing process, reduce the risk of deformation of the handle 30b towards the connecting portion 33, and further reduce the risk of interference between the connecting portion 33 and the side wall 112 of the paper tank 11, which causes the sliding jam.

[0049] In combination with Figure 1 , Figure 2 , Figure 4 and Figure 5 , in some embodiments, the sliding assembly 20 comprises a sliding piece 21 and a guide piece 22, the sliding piece 21 is slidably arranged on the mounting base 10 along the first direction X, the guide piece 22 is connected to the mounting base 10 and extends along the first direction X, and the sliding piece 21 is slidably arranged on the guide piece 22. The first direction X is parallel to the central axis of the printing paper roll accommodated in the paper tank 11. In this way, under the guidance of the guide piece 22, the sliding piece 21 can drive the paper clamping plate 30 to move more stably along the first direction X, so as to make the position adjustment of the paper clamping plate 30 more stable.

[0050] In some embodiments, the mounting base 10 is provided with the paper tank 11, the mounting space 12 and the sliding groove 13, and the sliding groove 13 communicates the paper tank 11 and the mounting space 12. The paper tank 11 is used to accommodate the printing paper roll, the guide piece 22 is arranged in the mounting space 12, and the sliding piece 21 passes through the sliding groove 13 and is slidably connected with the guide piece 22. In this way, the paper tank 11 and the mounting space 12 are respectively located on opposite sides of the mounting base 10, so as to realize the sliding connection of the paper clamping plate 30 and the mounting base 10, and the components related to the sliding connection do not occupy the space in the paper tank 11 or occupy less space in the paper tank 11.

[0051] In some embodiments, the sliding piece 21 is arranged in a spaced manner with the groove wall of the sliding groove 13. In this way, the sliding piece 21 does not contact the groove wall of the sliding groove 13 during the sliding process, so as to avoid the interference and the sliding jam. Even if the paper clamping plate 30 is deformed, since the sliding piece 21 is arranged in a spaced manner with the groove wall of the sliding groove 13, the interference between the sliding piece 21 and the groove wall of the sliding groove 13 can be avoided or the degree of interference is reduced, so as to reduce the risk of sliding jam.

[0052] In some embodiments, the paper bin 11 has a bottom wall 111 and a side wall 112 connected to the bottom wall 111. The paper clamping plate 30 has a bottom end surface 31 and a side end surface 32 connected to the bottom end surface 31, the bottom end surface 31 is arranged towards the bottom wall 111, and the side end surface 32 is arranged towards the side wall 112. The side end surface 32 is spaced apart from the side wall 112 opposite thereto. In this way, the sliding friction between the side end surface 32 and the side wall 112 opposite thereto can be prevented, thereby preventing the sliding jam.

[0053] Optionally, the spacing between the side end surface 32 and the side wall 112 is 0.5mm-3mm, for example, the spacing is 0.6mm, 1mm or 2mm. Based on this, the spacing between the side end surface 32 and the side wall 112 is moderate, on the one hand, it can play a good anti-jamming effect, on the other hand, it can ensure that the length of the connecting structure such as the sliding strip between the paper clamping plate 30 and the mounting seat 10 is shorter, and it is not easy to deform, thereby improving the anti-jamming effect.

[0054] In some embodiments, the mounting seat 10 is provided with a limiting groove (not shown in the figure) extending along the first direction X, and the paper clamping plate 30 is provided with a limiting protrusion 35 which is slidably embedded in the limiting groove. In this way, through the sliding cooperation between the limiting groove and the limiting protrusion 35, the stability of the sliding process of the paper clamping plate 30 is improved. Optionally, the mounting seat 10 is provided with a limiting groove extending along the first direction X, and the limiting groove is arranged on the bottom wall 111. The paper clamping plate 30 is provided with a limiting protrusion 35 which is slidably embedded in the limiting groove. In this way, the limiting protrusion 35 and the sliding piece 21 are respectively connected to the bottom end surface 31 and the side end surface 32 of the paper clamping plate 30, and they do not interfere with each other, and they guide and limit different parts of the paper clamping plate 30 at the same time during the sliding process, further improving the stability of the sliding process and reducing the risk of deformation of the paper clamping plate 30 during the sliding process. Optionally, the paper clamping plate 30 includes a paper clamping body 30a for clamping a roll of printing paper and a handle 30b for actuating the paper clamping body 30a, the handle 30b is connected to one side of the paper clamping body 30a along the second direction Y which intersects with the first direction X, for example, perpendicular to the first direction X, and the actuating area 34 is arranged on the handle 30b. Among them, one side of the paper clamping body 30a towards the bottom wall 111 of the paper bin 11 is provided with a bottom extension 36, one end of the bottom extension 36 is connected to the paper clamping body 30a, and the other end extends towards the bottom wall 111 of the paper bin 11. The limiting protrusion 35 is arranged on the bottom extension 36. In this way, the bottom sliding limiting is realized at the same time, and the clamping space is not occupied.

[0055] In some embodiments, the actuating area 34 extends from the top of the paper clamping plate 30 towards the connecting portion 33. In this way, the actuating area 34 is closer to the connecting portion 33, so that when an external force is applied to the actuating area 34, the degree of deformation of the paper clamping plate 30 is smaller, thereby reducing the risk of sliding jam.

[0056] In some embodiments, the number of the paper clamping plates 30 is two, and the two paper clamping plates 30 are arranged in the first direction X with a spacing therebetween to form a clamping space. The two paper clamping plates 30 are respectively connected to the mounting base 10 through one sliding member 21 in the first direction X, and the sliding directions of the two paper clamping plates 30 are opposite, so as to more flexibly adjust the clamping space.

[0057] The sliding assembly 20 further comprises a gear 23 and two oppositely arranged racks 24, the two racks 24 are respectively connected to the two sliding members 21, the gear 23 is engaged with the two racks 24 at the same time, and the movement directions of the two racks 24 are opposite. In this way, through the engagement between the gear 23 and the racks 24, the movement between the two paper clamping plates 30 is linked, that is, when one paper clamping plate 30 is slid, the other paper clamping plate 30 can also be slid synchronously. In this way, the adjustment of the clamping space is more convenient and labor-saving, and the structure of the sliding assembly 20 is simplified, and the space is saved.

[0058] Optionally, the sliding assembly 20 further comprises a first elastic reset member 25, one end of the first elastic reset member 25 is connected to the mounting base 10, and the other end is connected to one of the sliding members 21. The first elastic reset member 25 is configured to be elastically deformed in the first direction X when the external force is lost, so as to drive the corresponding sliding member 21 and the paper clamping plate 30 connected thereto to move and reset in the first direction X. In this way, when the adjusting force applied to the paper clamping plate 30 is ended without the need to continue to adjust the position of the paper clamping plate 30, the first elastic reset member 25 can automatically drive the paper clamping plate 30 to move and reset, thereby improving the convenience of operation.

[0059] Optionally, the sliding assembly 20 further comprises a second elastic reset member 26, one end of the second elastic reset member 26 is connected to the mounting base 10, and the other end is connected to one of the sliding members 21. The second elastic reset member 26 is configured to be elastically deformed in the second direction Y when the external force is lost, so as to drive the corresponding sliding member 21 and the paper clamping plate 30 connected thereto to move and reset in the second direction Y. In this way, when the adjusting force applied to the paper clamping plate 30 is ended without the need to continue to adjust the position of the paper clamping plate 30, the second elastic reset member 26 can automatically drive the paper clamping plate 30 to move and reset, thereby improving the convenience of operation.

[0060] Optionally, the sliding assembly 20 further comprises a first elastic reset member 25 and a second elastic reset member 26. One end of the first elastic reset member 25 is connected to the mounting base 10, and the other end is connected to one of the sliding members 21. The first elastic reset member 25 is configured to elastically deform along the first direction X when the external force is lost, so as to drive the corresponding sliding member 21 and the paper clamping plate 30 connected thereto to move back along the first direction X. One end of the second elastic reset member 26 is connected to the mounting base 10, and the other end is connected to one of the sliding members 21. The second elastic reset member 26 is configured to elastically deform along the second direction Y when the external force is lost, so as to drive the corresponding sliding member 21 and the paper clamping plate 30 connected thereto to move back along the second direction Y. In this way, when the pushing force applied to the paper clamping plate 30 is lost without the need to continue adjusting the position of the paper clamping plate 30, the first elastic reset member 25 and the second elastic reset member 26 can automatically drive the corresponding paper clamping plate 30 to move back, thereby improving the convenience of operation.

[0061] Based on the same inventive concept, the embodiments of the present application also provide a label printer, which comprises a printing mechanism and the paper clamping mechanism described above. The printing mechanism is connected to the paper clamping mechanism to print the printing paper output by the printing paper roll in the paper bin.

[0062] In the description of the present application, it should be understood that the terms "first", "second" and the like are used only for the purpose of description, and cannot be understood as indicating or implying relative importance. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances. In addition, in the description of the present application, "a plurality of" means at least two, for example, two, three, four, and the like, unless otherwise specified. "And / or", which describes the association relationship between the associated objects, means that there can be three kinds of relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. The character " / " generally represents an "or" relationship between the associated objects before and after it.

[0063] The above disclosure is only the preferred embodiments of the present application, which cannot limit the scope of the rights of the present application, so the equivalent changes made according to the claims of the present application still fall within the scope of the present application.

Claims

1. A paper clamping mechanism, characterized by comprising: The application relates to a paper clamping device, comprising: a mounting base provided with a paper bin for accommodating a printing paper roll, the paper bin having a bottom wall and a side wall connected with the bottom wall; a sliding assembly comprising a sliding piece arranged in the mounting base along a first direction, the first direction being parallel to the central axis of the printing paper roll accommodated in the paper bin; and a paper clamping plate having a bottom end surface and a side end surface connected with the bottom end surface, the bottom end surface being arranged towards the bottom wall, and the side end surface being arranged towards the side wall; wherein the paper clamping plate has a dialing area for a user to dial the paper clamping plate, the side end surface has a connecting part connected with the sliding piece, and the distance from the dialing area to the connecting part is smaller than the distance from the dialing area to the bottom wall. The connecting part has a first center point, the bottom end surface has a second center point, and the dialing area has a third center point; 2. The paper gripping mechanism according to claim 1, characterized in that, wherein the ratio of the distance between the first center point and the third center point to the distance between the second center point and the third center point is greater than 0 and smaller than 2 / 3. The orthogonal projection of the first center point on the plane where the bottom end surface is located is between the orthogonal projection of the second center point on the plane where the bottom end surface is located and the orthogonal projection of the third center point on the plane where the bottom end surface is located.

3. The paper gripping mechanism according to claim 1, wherein The paper clamping plate comprises a paper clamping body for clamping the printing paper roll and a handle for dialing the paper clamping body, the handle being connected to one side of the paper clamping body along a second direction, the second direction intersecting the first direction; 4. The paper gripping mechanism according to claim 1, wherein the dialing area is arranged on the handle; the width of the handle gradually increases in the direction close to the paper clamping body, and the width direction of the handle is perpendicular to the bottom end surface. The paper clamping body has a fourth center point located on the central axis of the printing paper roll accommodated in the paper bin; 5. The paper gripping mechanism according to claim 1, wherein the distance between the first center point and the third center point is smaller than the distance between the fourth center point and the third center point. The sliding assembly further comprises a guide piece connected to the mounting base and extending along the first direction, and the sliding piece is slidingly arranged in the guide piece.

6. The paper gripping mechanism according to claim 1, wherein The mounting base is further provided with a mounting space, and the mounting base is provided with a sliding groove communicating the paper bin and the mounting space; 7. The paper gripping mechanism according to claim 6, wherein the guide piece is arranged in the mounting space, and the sliding piece passes through the sliding groove and is slidingly connected with the guide piece. The sliding piece and the groove wall of the sliding groove are arranged in a spaced manner.

8. The paper gripping mechanism according to claim 7, characterized in that The side end surface and the side wall opposite to the side end surface are arranged in a spaced manner.

9. The paper gripping mechanism according to claim 1, wherein The distance between the side end surface and the side wall is 0.5mm-3mm.

10. The paper gripping mechanism according to claim 9, wherein The mounting base is provided with a limiting groove extending along the first direction, and the paper clamping plate is provided with a limiting protrusion, the limiting protrusion being slidingly embedded in the limiting groove.

11. The paper gripping mechanism according to claim 1, wherein The limiting groove is arranged on the bottom wall.

12. The paper gripping mechanism according to claim 11, wherein The dialing area extends from the top of the paper clamping plate towards the connecting part.

13. The paper gripping mechanism according to claim 1, wherein The number of the paper clamping plates and the number of the sliding pieces are both two, the sliding assembly further comprises a gear and two oppositely arranged racks, the two racks are connected with the two sliding pieces respectively, the gear is engaged with the two racks simultaneously, and the movement directions of the two racks are opposite.

14. The paper gripping mechanism according to claim 1, wherein ​ 15. The paper gripping mechanism according to claim 14, wherein The sliding assembly further comprises a first elastic reset member, one end of the first elastic reset member is connected to the mounting seat, the other end is connected to one of the sliding members, the first elastic reset member is configured to be elastically deformed in the first direction when losing external force, to drive the corresponding sliding member and the paper clamping plate connected thereto to move and reset in the first direction; and / or The sliding assembly further comprises a second elastic reset member, one end of the second elastic reset member is connected to the mounting seat, the other end is connected to one of the sliding members, the second elastic reset member is configured to be elastically deformed in the second direction when losing external force, to drive the corresponding sliding member and the paper clamping plate connected thereto to move and reset in the second direction.

16. A label printer characterized by A printing mechanism comprising the paper clamping mechanism according to any one of claims 1-15 and connected to the paper clamping mechanism.

Images