Paper guide mechanism for thermal printer

Abstract

The utility model relates to the technical field of printers, in particular to a paper guide mechanism for a thermal printer, which comprises a paper guide piece connected with a paper bin and extending to a machine core, a pressing piece arranged on the opposite side of the paper guide piece and a limiting assembly, and a paper guide gap is formed between the paper guide piece and the pressing piece. The paper guiding gap is internally provided with a guiding wheel and the limiting assembly for limiting the printing paper from deviating. The paper feeding device has the advantages that the limiting blocks limit the side edges of the paper feeding device so that the paper feeding device can vertically enter the rubber roller, and irregular paper feeding and non-uniform paper feeding speed caused by deviation are avoided; when printing paper enters the paper guide gap, the pressing piece is matched with the first paper guide plate to apply certain pressure to the printing paper, so that the printing paper can stably enter the paper guide gap, certain tension can be kept, and shaking is avoided; and the guide wheels are arranged in the paper guide gap, so that the contact area with the printing paper can be reduced, assistance can be provided for movement of the printing paper, and the user experience is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a paper guiding mechanism for a thermal printer. Background Art

[0002] Thermal printers are widely used in many industries due to their convenience. When printing receipts with existing thermal printers, the printing paper is usually installed on the roller of the paper bin, and the printing paper is released by the rubber roller. During the process of the rubber roller driving the printing paper, the position of the printing paper may be offset, causing paper jams or printing position offsets, affecting the user experience. In order to solve the above problems, it is urgent to provide a paper guide mechanism for thermal printers to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a paper guide mechanism for a thermal printer, so as to exert a certain pressure on the printing paper before the printing paper enters the rubber roller for printing, so that the printing paper enters the rubber roller at a set position, avoiding position deviation and thus causing paper jam, thereby improving the user experience.

[0004] To achieve this purpose, the utility model adopts the following technical scheme: a paper guide mechanism for a thermal printer, which can be connected to the paper bin and the movement of the thermal printer respectively, and the printing paper passes between the movement and the rubber roller of the thermal printer, characterized in that: the paper guide mechanism includes a paper guide, a clamping member and a limit assembly, the paper guide is connected to the paper bin and extends to the movement, the clamping member is arranged on the opposite side of the paper guide, a paper guide gap is formed between the paper guide and the clamping member, and a guide wheel and the limit assembly for limiting the deviation of the printing paper are arranged in the paper guide gap.

[0005] Furthermore, the pressing piece is connected to the machine base and a notch is provided on a side thereof close to the movement, and the limiting assembly is arranged at the notch and is movably connected to the machine base.

[0006] Furthermore, the limiting assembly includes limiting grooves symmetrically arranged on the base, limiting blocks connected to the limiting grooves, and stoppers plugged into the limiting blocks, and the pressing member is arranged between the two stoppers.

[0007] Furthermore, the end of the stopper away from the limiting block extends into the paper guiding gap and maintains a preset distance from the paper guiding member.

[0008] Furthermore, the limit block is provided with a plurality of slots, and the ends of the symmetrically arranged stoppers away from the paper guide gap are inserted into the slots, and the sides of the stoppers close to each other contact with the sides of the printing paper to limit the deviation of the printing paper.

[0009] Furthermore, first detection members are provided on the sides of the symmetrically arranged stoppers that are close to each other.

[0010] Furthermore, the paper guide member includes a first paper guide connected to the paper bin, a second paper guide parallel to the clamping member, and a third paper guide extending along the second paper guide toward the rubber roller, the guide wheel is spaced apart on the side of the second paper guide opposite to the clamping member, and the third paper guide is connected to the movement.

[0011] Furthermore, along the paper feeding direction, the thickness of the third paper guide gradually decreases.

[0012] Furthermore, a second detection member is provided on the side of the third paper guide close to the rubber roller.

[0013] Furthermore, the first paper guide is an arc-shaped plate with a protrusion provided thereon, and a plug hole matching the protrusion is provided in the paper bin.

[0014] The beneficial effects of the utility model are as follows: before the printing paper enters the rubber roller, the block limits its side edge so that it enters vertically, avoiding uneven paper output and uneven paper output speed caused by offset; when the printing paper enters the paper guide gap, the clamping part cooperates with the paper guide part to give the printing paper a certain pressure, which can not only make it enter the paper guide gap stably, but also maintain a certain tension to avoid jitter; the guide wheel is arranged in the paper guide gap, which can not only reduce the contact area with the printing paper, but also provide assistance for the movement of the printing paper, thereby improving the user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments of the present invention. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the contents of the embodiments of the present invention and these drawings without paying any creative work.

[0016] Figure 1 It is a schematic diagram of the appearance of a thermal printer provided by an embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of an embodiment provided by the embodiment of the utility model;

[0018] Figure 3 yes Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4 It is a schematic diagram of the limiting groove of the embodiment provided by the utility model;

[0020] Figure 5 It is a side view of the limiting assembly of the embodiment provided by the utility model;

[0021] Figure 6 yes Figure 2 A partial enlarged view of point B in the middle.

[0022] The following are marked in the figure:

[0023] 100, base; 200, cover; 210, base; 300, paper bin; 310, jack; 400, movement; 500, rubber roller; 600, paper guide; 610, first paper guide; 611, raised portion; 612, buckle portion; 620, second paper guide; 630, third paper guide; 700, pressing member; 710, bar raised portion; 800, paper guide gap; 810, guide wheel; 820, limit assembly; 821, limit groove; 822, limit block; 823, stop block; 824, limit port; 900, paper outlet. DETAILED DESCRIPTION

[0024] The present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only partial structures related to the present invention are shown in the accompanying drawings, rather than the entire structure.

[0025] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the connection of the internal structures of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0026] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0027] In the description of this embodiment, the terms "upper", "lower", "left", "right" and other directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplified operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation of the present invention. In addition, the terms "first", "second" / "third" are only used to distinguish in the description and have no special meaning.

[0028] like Figure 1 and Figure 2 As shown, the thermal printer involved in the utility model comprises a base 100, a base 210 arranged above the base 100, a cover 200 and a printing assembly, wherein a paper bin 300 is arranged below the cover 200, and when the printer is working, the paper roll can rotate in the paper bin 300 to release the printing paper. The cover 200 covers the base 100 and the base 210, and a paper outlet 900 is formed between the base 210 and the cover 200. The printing assembly comprises a movement 400 and a rubber roller 500, the rubber roller 500 is rotatably arranged on the base 210, the movement 400 is arranged on the base 100, the cover 200 is rotatably connected to the base 100, and opening or closing the cover 200 can facilitate the placement of the paper roll in the paper bin 300, and also facilitate the assembly, detection, inspection and maintenance of the internal structure of the micro printer. In the working state, the printing paper is released from the paper bin 300, passes through the gap between the machine core 400 and the rubber roller 500, and is discharged from the paper outlet 900 to complete the printing.

[0029] like Figure 2 and Figure 3 As shown, the utility model provides a paper guide mechanism for a thermal printer, the paper guide mechanism includes a paper guide 600, a pressing member 700 and a limiting assembly 820, wherein the paper guide 600 is connected to the paper bin 300 and extends to the movement 400, the pressing member 700 is arranged on the opposite side of the paper guide 600, a paper guide gap 800 is formed between the paper guide 600 and the pressing member 700, and a guide wheel 810 and a limiting assembly 820 for limiting the deviation of the printing paper are arranged in the paper guide gap 800. The limiting assembly 820 is arranged in the paper guide gap 800, and the printing paper is limited from the side, so that the printing paper enters between the rubber roller 500 and the movement 400 from the set position, that is, enters in the direction perpendicular to the roller axis of the rubber roller 500, so as to avoid uneven paper output caused by deviation and uneven paper output speed, which is conducive to improving the user experience.

[0030] Preferably, the limit assembly 820 is connected to the base 210 and maintains a certain preset distance from the rubber roller 500 to ensure safety, which can effectively limit the position of the printing paper before entering the rubber roller 500 and does not hinder the normal rotation of the rubber roller 500. In this embodiment, in order to ensure the compactness of the overall structure, the safety distance between the limit assembly 820 and the rubber roller 500 is 1.5 cm-2 cm.

[0031] Preferably, the pressing member 700 is connected to the base 210 and a notch is provided on the side thereof close to the movement 400, and the limiting assembly 820 is arranged at the notch and is movably connected to the base 210. In this embodiment, the pressing member 700 is arranged on the side of the base 210 close to the paper guide gap 800, and the limiting assembly 820 is detachably connected to the base 210, which is convenient for later replacement and maintenance.

[0032] Preferably, the limiting assembly 820 includes a limiting groove 821 symmetrically arranged on the base 210, a limiting block 822 connected to the limiting groove 821, and a stopper 823 plugged into the limiting block 822, and the pressing member 700 is arranged between the two stoppers 823. Figure 4 and Figure 5 As shown, the limiting groove 821 is circular, and a plurality of recessed portions are circumferentially arranged on the inner wall at the bottom of the limiting groove 821 . Correspondingly, a protruding portion matching the recessed portion is arranged on the outer side of the limiting block 822 to achieve mutual fixation between the limiting groove 821 and the limiting block 822 .

[0033] Preferably, the stopper 822 is provided with a plurality of slots, and the end of the stopper 823 away from the paper guide gap 800 is inserted into the slot, and the sides of the two symmetrically arranged stoppers 823 close to each other contact the side of the printing paper to limit the deviation of the printing paper. When in use, the position of the stopper 823 can be flexibly selected according to the width of the printing paper, and the stopper 823 can be fixed by the slot to maintain the spacing between the two stoppers 823, so that the printing paper is not easy to deviate during the printing process, and the uneven paper output caused by the deviation is avoided, and the paper output speed is uneven. In addition, the different distances between the two stoppers 823 can be used for printing papers of different widths, which is more flexible.

[0034] Preferably, the symmetrically arranged stoppers 823 are provided with a limiting opening 824 on the sides close to each other, and the printing paper passes through the limiting opening 824 along the paper feeding direction, which makes the restriction on the printing paper more gentle, improves the stability of the printing paper feeding, reduces the shaking, and avoids paper jams. In this embodiment, the symmetrically arranged stoppers 823 extend toward the side of the printing paper so that the printing paper is stuck at the limiting opening 824, and cooperates with the paper feeding channel (that is, the paper guide gap) to limit the side of the printing paper, thereby avoiding the jamming of the paper outlet 900 and affecting the use.

[0035] Preferably, a first detection component is provided on the side where the two symmetrically arranged blocks 823 are close to each other, that is, the side where the block 823 is connected to the paper guide gap 800, for detecting the signal of the printing paper passing through the limit block 823 to determine whether the printing paper is in the set position, so as to adjust its position in time so that it can vertically enter between the rubber roller 500 and the movement 400 for printing.

[0036] Preferably, the paper guide 600 includes a first paper guide 610 connected to the paper bin 300, a second paper guide 620 parallel to the clamping member 700, and a third paper guide 630 extending along the second paper guide 620 toward the rubber roller 500, a guide wheel 810 is provided on the side opposite to the second paper guide 620 and the clamping member 700, and the third paper guide 630 is connected to the movement 400. In this embodiment, after the printing paper is transferred out from the paper bin 300, it passes through the first paper guide 610, the second paper guide 620 and the third paper guide 630 in sequence, and then enters between the rubber roller 500 and the movement 400 for printing. The end of the clamping member 700 away from the limiting assembly 820 is provided with a strip protrusion 710 facing the first paper guide 610. The length direction of the strip protrusion 710 is parallel to the moving direction of the printing paper, giving the printing paper a certain pressure so that it can stably enter the paper guide gap 800 and maintain a certain tension during the paper feeding, which is conducive to keeping the printing paper taut in the paper feeding gap and avoiding the printing paper from shaking.

[0037] Preferably, along the paper feeding direction, the thickness of the third paper guide 630 gradually decreases. In this embodiment, the side of the third paper guide 630 away from the paper guide gap 800 is connected to the movement 400.

[0038] Preferably, a second detection member is provided on the side of the third paper guide 630 close to the rubber roller 500 for detecting the printing paper in the paper guide gap 800 to determine whether there is still printing paper in the paper bin 300 and to promptly remind the user to add paper.

[0039] Preferably, the first paper guide 610 is an arc-shaped plate, on which a protrusion 611 is provided facing the paper guide gap 800. In this embodiment, the protrusion 611 cooperates with the strip protrusion 710 to stabilize the printing paper released from the paper bin to ensure the stability of the paper feeding process and avoid shaking.

[0040] Preferably, a buckle portion 612 is provided on the side of the first paper guide 610 away from the paper guide gap, and a plug hole 310 matching the buckle portion 612 is provided in the paper bin 300. Figure 6The inner wall of the paper bin 300 is provided with a plurality of recessed insertion holes 310, and correspondingly, the side of the first paper guide 610 away from the paper guide gap 800 is provided with a buckle portion 612 extending far away and matching the insertion hole 310, the insertion hole 310 and the buckle portion 612 cooperate with each other, and the first paper guide 610 is connected to the base 210, which increases the stability of the first paper guide 610 and is more conducive to the stability of paper output, and cooperates with the clamping member 700, which can effectively avoid the influence of the shaking caused by the rotation of the paper roll in the paper bin 300 on the printing paper.

[0041] Preferably, the first paper guide 610, the second paper guide 620 and the third paper guide 630 are designed as an integrated molding. In this embodiment, the second paper guide 620 is arranged in parallel with the pressing member 700, and a certain distance is maintained between the two to provide sufficient space for the advancement of the printing paper. The sides of the two that are close to each other are spaced apart with guide wheels 810, and the guide wheels 810 protrude toward the paper guide gap 800, thereby reducing the contact area between the pressing member 700 and the second paper guide 620 and the printing paper, thereby reducing the resistance of the printing paper to advance in the paper guide gap. Of course, the guide wheel 810 can be set only on one side of the pressing member 700 or only on one side of the second paper guide 620, and no specific limitation is made here, as long as the same function can be achieved. The guide wheel 810 is a ball embedded in the pressing member 700 and / or the second paper guide 620, and the ball can rotate freely. The setting of the roller can not only reduce the contact area with the printing paper, but also provide assistance for the movement of the printing paper.

[0042] Preferably, cutting teeth are provided at the paper outlet 900. In this embodiment, cutting teeth are provided at the end of the base 210 near the paper outlet to facilitate timely removal of printing paper and avoid dragging to affect the normal use of the printer.

[0043] Note that the above shows and describes the basic principles and main features of the utility model and the advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected, and the scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A paper guide mechanism for a thermal printer, which can be connected to the paper bin and the core of the thermal printer respectively, and the printing paper passes between the core and the rubber roller of the thermal printer, characterized in that: The paper guiding mechanism includes a paper guiding member, a pressing member and a limiting assembly. The paper guiding member is connected to the paper bin and extends to the movement. The pressing member is arranged on the opposite side of the paper guiding member. A paper guiding gap is formed between the paper guiding member and the pressing member. A guide wheel and the limiting assembly for limiting the deviation of the printing paper are arranged in the paper guiding gap.

2. The paper guide mechanism for a thermal printer according to claim 1, characterized in that: The pressing piece is connected to the base of the thermal printer and a notch is provided on one side of the pressing piece close to the core. The limiting assembly is arranged at the notch and is movably connected to the base.

3. The paper guide mechanism for a thermal printer according to claim 2, characterized in that: The limiting assembly comprises limiting grooves symmetrically arranged on the base, limiting blocks connected to the limiting grooves, and stoppers plugged into the limiting blocks, and the pressing member is arranged between the two stoppers.

4. The paper guide mechanism for a thermal printer according to claim 3, characterized in that: The end of the stopper away from the limiting block extends into the paper guiding gap and maintains a preset distance from the paper guiding member.

5. The paper guide mechanism for a thermal printer according to claim 3 or 4, characterized in that: The limit block is provided with a plurality of slots, the end of the block away from the paper guide gap is inserted into the slot, and the symmetrically arranged side surfaces of the block close to each other contact with the side edges of the printing paper to limit the deviation of the printing paper.

6. The paper guide mechanism for a thermal printer according to claim 5, characterized in that: The first detection member is provided on the side surfaces of the symmetrically arranged stoppers that are close to each other.

7. The paper guide mechanism for a thermal printer according to claim 6, characterized in that: The paper guide comprises a first paper guide connected to the paper bin, a second paper guide parallel to the pressing member, and a third paper guide extending along the second paper guide toward the rubber roller, the guide wheel is spaced apart from the side of the second paper guide opposite to the pressing member, and the third paper guide is connected to the movement.

8. The paper guide mechanism for a thermal printer according to claim 7, characterized in that: Along the paper feeding direction, the thickness of the third paper guide gradually decreases.

9. The paper guide mechanism for a thermal printer according to claim 7 or 8, characterized in that: A second detecting member is provided on the side of the third paper guide close to the rubber roller.

10. The paper guide mechanism for a thermal printer according to claim 7 or 8, characterized in that: The first paper guide is an arc-shaped plate with a raised portion provided thereon, and a plug hole matching the raised portion is provided in the paper bin.

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