A paper feeding mechanism with a reverse bending channel

Abstract

The present invention provides a paper feeding mechanism of a reverse bending channel, comprising: a middle frame, a paper bin is formed inside; a paper roll is rotatably arranged inside the paper bin; a rubber roller is rotatably arranged outside the middle frame, and the paper roll pulls out the paper and is connected with the rubber roller by rolling; a paper pressing mechanism is arranged between the middle frame and the rubber roller, and a reverse bending paper feeding channel is formed by the outlet of the middle frame, the paper pressing mechanism and the rubber roller, the upper part of the outlet of the middle frame forms a first supporting part, and when the paper pressing mechanism is covered on the middle frame, a second supporting part is formed by the lower end of the outer side of the paper pressing mechanism, and the paper of the paper roll is reversely pulled out through the paper feeding channel; a printing mechanism is arranged adjacent to the rubber roller and is used to print the paper; a sensor mechanism is arranged on the middle frame and located on the outer lower side of the paper feeding channel, and the sensor mechanism is on the outer side of the paper away from the printing mechanism. The reverse bending paper feeding channel is formed by the paper feeding mechanism, the paper bending angle is large, the leveling effect is ideal, and the internal space of the printer can be reduced.

Description

Technical Field

[0001] The invention belongs to the technical field of thermal printers, and in particular relates to a paper feeding mechanism of a reverse bending channel. Background Art

[0002] A thermal printer is a printer that uses a thermal print head to produce a chemical reaction on thermal paper to form text or images. Thermal printers are widely used in various fields, such as printing cash register receipts in supermarkets, printing menus in the catering industry, printing delivery labels in the express delivery industry, etc. It plays an important role in some scenarios where paper vouchers need to be output quickly.

[0003] When a thermal printer prints, the paper will be curled after printing. Because it will bring a poor user experience, the paper usually needs to be flattened. Figure 8 The figure shows the paper feeding structure of the prior art. Since the existing sensor 16 is located on the side close to the existing print head 17, the entire existing paper 18 is relatively close to the print head 17 at the turning point, which makes the turning angle larger, resulting in an unsatisfactory flattening effect on the paper 18. If the bending angle needs to be reduced, it needs to be designed away from the print head 17, which will increase the internal space of the printer, is not convenient for miniaturized design, and increases the size of the printer. Summary of the invention

[0004] The object of the present invention is to provide a paper feeding mechanism with a reverse bending channel to solve the problems raised in the above background technology.

[0005] In view of this, the present invention provides a paper feeding mechanism of a reverse bending channel, comprising:

[0006] Middle frame, with paper bin formed inside;

[0007] A paper roll is rotatably arranged inside the paper bin;

[0008] A rubber roller is rotatably arranged on the upper oblique side of the middle frame, and the paper roll pulls out the paper and is connected with the rubber roller by rolling;

[0009] The paper pressing mechanism is arranged between the middle frame and the rubber roller, and a reversely bent paper feeding channel is formed by the outlet of the middle frame, the paper pressing mechanism and the rubber roller. The upper part of the outlet of the middle frame forms a first support part. When the paper pressing mechanism is covered on the middle frame, a second support part is formed by the lower end of the outer side of the paper pressing mechanism. The paper of the paper roll is reversely pulled out through the paper feeding channel. Usually, the paper pressing mechanism is installed on the flip cover, and the flip cover is installed on the middle frame in a flipping form. After the flip cover is flipped up, it is convenient to replace the paper roll. After the flip cover is covered, the paper pressing mechanism limits the paper. When the paper is transmitted through the rotation of the rubber roller, the paper is transmitted from the paper feeding channel. The paper roll always slides on the second support part. When the paper roll size is large, the paper will not contact the first support part. After continuous use, the diameter of the paper roll gradually decreases, so that the paper will be lifted by the first support part. However, in this state, the angle change of the paper is also small, so that the bending degree of the paper feeding does not change much, and it still has a stable paper feeding and leveling effect.

[0010] The printing mechanism is arranged adjacent to the rubber roller and is used for printing on the paper.

[0011] The guiding mechanism is a PET film, which is attached to the opening of the middle frame and to the first support part and the second support part. When the diameter of the paper roll becomes smaller, it is lifted by the first support part. At this time, the pulling force of the paper will become larger. The PET film has a higher smoothness, so the guiding mechanism can make the paper smoothly transmitted along the guiding mechanism.

[0012] The sensing mechanism is arranged on the middle frame and located on the outer lower side of the paper feeding channel. The sensing mechanism is on the side of the outer side of the paper away from the printing mechanism. As shown in the figure, it is a paper feeding diagram of the present invention. It can be seen that compared with the traditional paper feeding diagram, the relative positions of the sensing mechanism, the printing mechanism and the paper are greatly changed. The sensing mechanism is on the other side away from the printing mechanism. In this way, the paper presents a larger bending angle when in the paper feeding channel, and the middle frame can be designed to be closer to the printing mechanism, thereby reducing the space inside the printer, which is conducive to miniaturization design. On the other hand, the bending angle of the paper does not change much, and the larger bending angle of the paper makes the paper flattening effect better.

[0013] In the present invention, a further implementation scheme is that the height of the first support part is higher than the height of the second support part, so that the formed paper feeding channel is V-shaped. Under the constraint of the paper feeding channel, the paper passing through the paper feeding channel is V-shaped. Under the lifting effect of the first support part, when the diameter of the paper roll continues to decrease, the paper is still lifted by the first support part, which reduces the range of change of the bending angle of the paper. Due to the height difference, the paper roll can form a larger bending angle to discharge the paper, which not only reduces the internal space but also helps to flatten the paper.

[0014] In the present invention, a further implementation scheme is that the turning points of the first support part and the second support part are both arc-shaped surfaces, and the middle frame forms an acute angle through the first frame wall and the second frame wall, and the upper side of the corner where the first frame wall and the second frame wall are connected is the first support part. When the diameter of the paper roll becomes smaller, the paper slides and fits on the outer sides of the first support part and the second support part. The arc-shaped surfaces of the first support part and the second support part are conducive to maintaining a smooth paper feeding state during the sliding process, and play a certain leveling and guiding role for the paper.

[0015] In the present invention, a further implementation scheme is that the paper pressing mechanism includes a paper pressing block, the paper pressing block is fixed on the flip cover, the flip cover is arranged on the upper part of the middle frame, the rubber roller is rotatably arranged on the flip cover, the paper pressing block forms a third frame wall and a fourth frame wall, the second support portion is formed on the outside of the connecting corner of the third frame wall and the fourth frame wall, and an acute angle is formed between the third frame wall and the fourth frame wall. When the flip cover is closed on the middle frame, the outer side surface of the fourth frame wall is a vertical plane, and the plane where the fourth frame wall is located is on the right side of the vertical section on the left side of the rubber roller, so that the paper is in an oblique paper guiding direction. When feeding the paper, the paper always passes smoothly through the constraint of the second support portion, which can maintain a certain leveling and guiding effect on the paper. The positional relationship between the fourth frame wall and the rubber roller can maintain the paper feeding angle between the rubber roller and the paper pressing block at an inclined angle, and on the other hand, keep the paper in a vertical direction for paper discharge.

[0016] In the present invention, a further implementation scheme is that slots are formed at both ends of the flip cover, and insertion strips are formed on the outer sides of both ends of the paper pressing block. The paper pressing block is clamped on the slot through the insertion strips, and the bottom of the paper pressing block is convexly arranged along the length direction to form a convex block, a groove is provided on the flip cover, a card hole is provided on the paper pressing block, and a buckle is formed on the flip cover. The convex block is positioned and matched with the groove, and the buckle is clamped and matched with the card hole. The installation of the paper pressing block on the flip cover is in the form of multiple fixings, wherein the buckle and the card hole are fixed through the side to better offset the reaction torque generated by the paper when feeding, and also play a role in the stability of the connection between the flip cover and the paper pressing block.

[0017] In the present invention, a further implementation scheme is that the sensing mechanism includes a limit plate, a substrate is arranged on the limit plate, a sensor is arranged on the substrate, a card block is formed at one end of the limit plate, a through hole is arranged on the second frame wall, the limit plate is obliquely arranged between the first frame wall and the second frame wall, the limit plate is fixed to the insertion hole of the second frame wall by plugging through the card block, the other end of the limit plate is against the first frame wall, the sensor is located in the through hole facing the paper feeding channel, the inclination angle of the limit plate is consistent with the angle of the second frame wall, therefore, the sensing mechanism can be stably fixed on the lower part of the middle frame so that the limit block cannot fall out, the transmission state of the paper is detected by the sensor, and the sensing mechanism is arranged on the side away from the printing mechanism, so that the position of the paper bending can be as close to the printing mechanism as possible, thereby reducing the internal space of the printer, thereby performing a miniaturized design, and at the same time maintaining a larger bending angle of the paper can have a better leveling effect on the paper, killing two birds with one stone.

[0018] In the present invention, a further implementation scheme is that the printing mechanism includes a print head, a print head fixing plate, a push plate and a fixing plate, the push plate is elastically connected to the fixing plate by a spring, the print head fixing plate is fixed on the push plate, the print head is fixed on the print head fixing plate, the print head is located next to the rubber roller and cooperates with the paper feed channel to print on the paper, and under the reverse-bent paper feed channel, the paper is cooperated with the print head for printing to ensure a better printing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A cross-sectional view of a paper feeding mechanism of a reverse bending channel of the present invention Figure 1 ;

[0020] Figure 2 A cross-sectional view of a paper feeding mechanism of a reverse bending channel of the present invention Figure 2 ;

[0021] Figure 3 A schematic diagram of paper feeding of a paper feeding mechanism of a reverse bending channel of the present invention;

[0022] Figure 4 It is a schematic diagram of the exploded structure of the flip cover and the paper pressing block of the present invention;

[0023] Figure 5 It is a schematic diagram of the installation structure of the flip cover and the paper pressing block of the present invention;

[0024] Figure 6 It is a structural schematic diagram of the sensing mechanism of the present invention;

[0025] Figure 7 It is a schematic diagram of the installation structure of the sensor mechanism on the middle frame;

[0026] Figure 8 It is a paper feeding diagram of the prior art. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0028] In the description of the present application, it should be noted that the terms used herein are only for describing specific embodiments, and are not intended to limit the exemplary embodiments according to the present application. For ease of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. The technology, methods and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be regarded as part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further discussed in subsequent drawings.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and are not used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable under appropriate circumstances, so that the embodiments of the present application can be implemented in an order other than those illustrated or described here, and the objects distinguished by "first", "second", etc. are generally of one type, and the number of objects is not limited. For example, the first object can be one or more. In addition, "and / or" in the specification and claims represents at least one of the connected objects, and the character " / " generally indicates that the objects associated with each other are in an "or" relationship.

[0030] It should be noted that, in the description of the present application, the orientation or positional relationship indicated by terms such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise stated, these orientation words do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the scope of protection of the present application; the orientation words "inside and outside" refer to the inside and outside relative to the contour of each component itself.

[0031] It should be noted that, in the present application, the terms "comprise", "include" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprises one..." does not exclude the presence of other identical elements in the process, method, article or device including the element. In addition, it should be noted that the scope of the method and device in the embodiment of the present application is not limited to performing functions in the order shown or discussed, and may also include performing functions in a substantially simultaneous manner or in reverse order according to the functions involved, for example, the described method may be performed in an order different from that described, and various steps may also be added, omitted, or combined. In addition, the features described with reference to certain examples may be combined in other examples. Example 1

[0032] like Figure 1 and Figure 2 The invention relates to a paper feeding mechanism of a reverse bending channel, comprising:

[0033] Middle frame 1, with paper bin formed inside;

[0034] A paper roll 2 is rotatably arranged inside the paper bin;

[0035] The rubber roller 3 is rotatably arranged on the upper outer side of the middle frame 1, and the paper roll 2 pulls out the paper 6 and is rolled and connected with the rubber roller 3;

[0036] The paper pressing mechanism is arranged between the middle frame 1 and the rubber roller 3. A reversely bent paper feeding passage 4 is formed by the outlet of the middle frame 1, the paper pressing mechanism and the rubber roller 3. The upper part of the outlet of the middle frame 1 forms a first supporting part 1A. When the paper pressing mechanism is covered on the middle frame 1, a second supporting part 1B is formed by the lower end of the outer side of the paper pressing mechanism. The paper 6 of the paper roll 2 is pulled out in the reverse direction through the paper feeding passage 4. Usually, the paper pressing mechanism is installed on the flip cover 5. The flip cover 5 is installed on the middle frame 1 in a flipping manner. After the flip cover 5 is flipped up, it is convenient to replace the paper roll 2. After the flip cover 5 is covered, the paper pressing mechanism The mechanism limits the position of the paper 6. When the paper 6 is conveyed by the rotation of the rubber roller 3, the paper 6 is conveyed from the paper feeding channel 4. The paper roll 2 always slides on the second supporting portion 1B. When the paper roll 2 is large in size, the paper 6 will not contact the first supporting portion 1A. After continuous use, the diameter of the paper roll 2 gradually decreases, so that the paper 6 will be lifted up by the first supporting portion 1A. However, in this state, the angle change of the paper 6 is also small, so that the bending degree of the paper feeding does not change much, and it still has a stable paper feeding and leveling effect.

[0037] The printing mechanism is arranged adjacent to the rubber roller 3 and is used for printing on the paper 6 .

[0038] The guiding mechanism is a PET film, which is attached to the opening of the middle frame 1 and to the first support part 1A and the second support part 1B. When the diameter of the paper roll 2 becomes smaller, it is lifted by the first support part 1A. At this time, the pulling force of the paper 6 will become larger. The PET film has a higher smoothness, so the guiding mechanism can make the paper 6 smoothly transported along the guiding mechanism.

[0039] The sensor mechanism is arranged on the middle frame 1 and is located on the outer lower side of the paper path 4. The sensor mechanism is on the outer side of the paper 6 away from the printing mechanism. Figure 3 This is a paper feeding diagram of the present invention. It can be seen that, compared with the traditional paper feeding diagram, the relative positions of the sensing mechanism, the printing mechanism and the paper 6 are greatly changed. The sensing mechanism is on the other side away from the printing mechanism. In this way, the paper 6 presents a larger bending angle in the paper feeding channel 4, and the middle frame 1 can be designed to be closer to the printing mechanism, thereby reducing the space inside the printer, which is conducive to miniaturization. On the other hand, the bending angle of the paper 6 does not vary much, and the larger bending angle of the paper 6 makes the flattening effect of the paper 6 better.

[0040] In the present invention, a further embodiment is as follows Figure 1 and Figure 2 The height of the first support portion 1A is higher than that of the second support portion 1B, so that the formed paper feeding channel 4 is V-shaped. Under the constraint of the paper feeding channel 4, the paper 6 passing through the paper feeding channel 4 is fed in a V-shape. Under the lifting effect of the first support portion 1A, when the diameter of the paper roll 2 continues to decrease, the paper 6 is still lifted by the first support portion 1A, which reduces the range of variation of the bending angle of the paper 6. Due to the height difference, the paper roll 2 can form a larger bending angle for paper discharge, which not only reduces the internal space, but also helps to flatten the paper 6.

[0041] In the present invention, a further embodiment is as follows Figure 1 The turning points of the first support part 1A and the second support part 1B are both arcuate surfaces, and the middle frame 1 forms an acute angle through the first frame wall 1C and the second frame wall 1D. The upper side of the corner where the first frame wall 1C and the second frame wall 1D are connected is the first support part 1A. When the diameter of the paper roll 2 becomes smaller, the paper 6 slides on the outer sides of the first support part 1A and the second support part 1B. The arcuate surfaces of the first support part 1A and the second support part 1B are conducive to maintaining a smooth paper feeding state of the paper 6 during the sliding process, and play a certain leveling and guiding role for the paper 6. Example 2

[0042] A paper feeding mechanism of a reverse bending channel, comprising:

[0043] Middle frame 1, with paper bin formed inside;

[0044] A paper roll 2 is rotatably arranged inside the paper bin;

[0045] The rubber roller 3 is rotatably arranged on the upper outer side of the middle frame 1, and the paper roll 2 pulls out the paper 6 and is rolled and connected with the rubber roller 3;

[0046] The paper pressing mechanism is arranged between the middle frame 1 and the rubber roller 3. A reversely bent paper feeding passage 4 is formed by the outlet of the middle frame 1, the paper pressing mechanism and the rubber roller 3. The upper part of the outlet of the middle frame 1 forms a first supporting part 1A. When the paper pressing mechanism is covered on the middle frame 1, a second supporting part 1B is formed by the lower end of the outer side of the paper pressing mechanism. The paper 6 of the paper roll 2 is pulled out in the reverse direction through the paper feeding passage 4. Usually, the paper pressing mechanism is installed on the flip cover 5. The flip cover 5 is installed on the middle frame 1 in a flipping manner. After the flip cover 5 is flipped up, it is convenient to replace the paper roll 2. After the flip cover 5 is covered, the paper pressing mechanism The mechanism limits the position of the paper 6. When the paper 6 is conveyed by the rotation of the rubber roller 3, the paper 6 is conveyed from the paper feeding channel 4. The paper roll 2 always slides on the second supporting portion 1B. When the paper roll 2 is large in size, the paper 6 will not contact the first supporting portion 1A. After continuous use, the diameter of the paper roll 2 gradually decreases, so that the paper 6 will be lifted up by the first supporting portion 1A. However, in this state, the angle change of the paper 6 is also small, so that the bending degree of the paper feeding does not change much, and it still has a stable paper feeding and leveling effect.

[0047] The printing mechanism is arranged adjacent to the rubber roller 3 and is used for printing on the paper 6 .

[0048] The sensor mechanism is arranged on the middle frame 1 and is located on the outer lower side of the paper path 4. The sensor mechanism is on the outer side of the paper 6 away from the printing mechanism. Figure 3 This is a paper feeding diagram of the present invention. It can be seen that, compared with the traditional paper feeding diagram, the relative positions of the sensing mechanism, the printing mechanism and the paper 6 are greatly changed. The sensing mechanism is on the other side away from the printing mechanism. In this way, the paper 6 presents a larger bending angle in the paper feeding channel 4, and the middle frame 1 can be designed to be closer to the printing mechanism, thereby reducing the space inside the printer, which is conducive to miniaturization. On the other hand, the bending angle of the paper 6 does not vary much, and the larger bending angle of the paper 6 makes the flattening effect of the paper 6 better.

[0049] In the present invention, a further implementation scheme is that the height of the first support part 1A is higher than the height of the second support part 1B, so that the formed paper feeding channel 4 is V-shaped. Under the constraint of the paper feeding channel 4, the paper 6 passing through the paper feeding channel 4 is V-shaped. Under the lifting effect of the first support part 1A, when the diameter of the paper roll 2 continues to decrease, the paper 6 is still lifted by the first support part 1A, which reduces the range of change of the bending angle of the paper 6. Due to the height difference, the paper roll 2 can form a larger bending angle to discharge the paper, which not only reduces the internal space, but also helps to flatten the paper 6.

[0050] In the present invention, a further implementation scheme is that the turning points of the first support portion 1A and the second support portion 1B are both arcuate surfaces, and the middle frame 1 forms an acute angle through the first frame wall 1C and the second frame wall 1D, and the upper side of the corner where the first frame wall 1C and the second frame wall 1D are connected is the first support portion 1A. When the diameter of the paper roll 2 becomes smaller, the paper 6 slides on the outer sides of the first support portion 1A and the second support portion 1B. The arcuate surfaces of the first support portion 1A and the second support portion 1B are conducive to maintaining a smooth paper feeding state of the paper 6 during the sliding process, and play a certain leveling and guiding role for the paper 6.

[0051] In the present invention, a further embodiment is as follows Figure 4 , the paper pressing mechanism includes a paper pressing block 7, which is fixed on the flip cover 5, the flip cover 5 is arranged on the upper part of the middle frame 1, the rubber roller 3 is rotatably arranged on the flip cover 5, the paper pressing block 7 forms a third frame wall 7A and a fourth frame wall 7B, the second support portion 1B is formed on the outer side of the connecting corner of the third frame wall 7A and the fourth frame wall 7B, and an acute angle is formed between the third frame wall 7A and the fourth frame wall 7B. When the flip cover 5 is covered on the middle frame 1, the outer side surface of the fourth frame wall 7B is a vertical plane, and the plane where the fourth frame wall 7B is located is on the right side of the vertical section on the left side of the rubber roller 3, so that the paper 6 is in an oblique paper guiding direction. When feeding the paper, the paper 6 always passes smoothly through the constraint of the second support portion 1B, which can maintain a certain leveling and guiding effect on the paper 6. The positional relationship between the fourth frame wall 7B and the rubber roller 3 can maintain the paper 6 at an inclined angle with the paper feeding angle between the rubber roller 3 and the paper pressing block 7, and on the other hand, keep the paper 6 in a vertical direction for paper discharge. Example 3

[0052] In the present invention, a further embodiment is as follows Figure 4, slots 5A are formed at both ends of the flip cover 5, and insert strips 7C are formed on the outer sides of both ends of the paper pressing block 7. The paper pressing block 7 is clamped on the slot 5A through the insert strips 7C. The bottom of the paper pressing block 7 is convexly provided with a convex block 7D along the length direction. A groove 5B is provided on the flip cover 5, and a clamping hole 7E is provided on the paper pressing block 7. A buckle 5C is formed on the flip cover 5, and the convex block 7D is positioned and matched with the groove 5B. The buckle 5C is clamped and matched with the clamping hole 7E. The installation of the paper pressing block 7 on the flip cover 5 is in the form of multiple fixings, wherein the buckle 5C and the clamping hole 7E are fixed by the side to better offset the reaction torque generated by the paper 6 when the paper is fed, and also play a role in the connection stability between the flip cover 5 and the paper pressing block 7. Example 4

[0053] In the present invention, a further embodiment is as follows Figure 6 The sensing mechanism includes a limit plate 8, a substrate 9 is arranged on the limit plate 8, a sensor 10 is arranged on the substrate 9, a block 8A is formed at one end of the limit plate 8, a through hole 1E is provided on the second frame wall 1D, and the limit plate 8 is obliquely arranged between the first frame wall 1C and the second frame wall 1D, as shown in FIG. Figure 7 The limit plate 8 is plugged and fixed on the insertion hole 1F of the second frame wall 1D through the card block 8A, and the other end of the limit plate 8 is against the first frame wall 1C. The sensor 10 is located in the through hole 1E facing the paper feeding channel 4. The inclination angle of the limit plate 8 is consistent with the angle of the second frame wall 1D. Therefore, the sensing mechanism can be firmly fixed on the lower part of the middle frame 1, so that the limit plate 8 cannot fall out. The transmission status of the paper 6 is detected by the sensor 10. The sensing mechanism is arranged on the side away from the printing mechanism, so that the bending position of the paper 6 can be as close to the printing mechanism as possible, thereby reducing the internal space of the printer, thereby performing a miniaturized design, and keeping the larger bending angle of the paper 6 can have a better leveling effect on the paper 6, killing two birds with one stone. Example 5

[0054] In the present invention, a further embodiment is as follows Figure 2 The printing mechanism includes a print head 11, a print head fixing plate 12, a push plate 13 and a fixing plate 14. The push plate 13 is elastically connected to the fixing plate 14 through a spring 15. The print head fixing plate 12 is fixed on the push plate 13. The print head 11 is fixed on the print head fixing plate 12. The print head 11 is located next to the rubber roller 3 and cooperates with the paper feeding channel 4 to print on the paper 6. Under the reversely bent paper feeding channel 4, the paper 6 is printed by the print head 11 to ensure a better printing effect.

[0055] The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which are within the protection of the present application.

Claims

1. A paper feeding mechanism with a reverse bending channel, characterized in that: include: Middle frame, with paper bin formed inside; A paper roll is rotatably arranged inside the paper bin; A rubber roller is rotatably arranged on the upper oblique side of the middle frame, and the paper roll pulls out the paper and is connected with the rubber roller by rolling; A paper pressing mechanism is arranged between the middle frame and the rubber roller, and a reversely bent paper feeding passage is formed by the outlet of the middle frame, the paper pressing mechanism and the rubber roller, and the upper part of the outlet of the middle frame forms a first supporting part. When the paper pressing mechanism is covered on the middle frame, the lower end of the outer side of the paper pressing mechanism forms a second supporting part, and the paper of the paper roll is pulled out in the reverse direction through the paper feeding passage; The guiding mechanism is a PET film, which is attached to the opening of the middle frame and to the first supporting part and the second supporting part, and is used for smoothly conveying the paper lifted by the first supporting part along the guiding mechanism when the diameter of the paper roll becomes smaller; A printing mechanism, disposed adjacent to the rubber roller, for printing on paper; The sensor mechanism is arranged on the middle frame and located at the outer lower side of the paper feeding passage, and the sensor mechanism is on the outer side of the paper away from the printing mechanism; The paper pressing mechanism comprises a paper pressing block, the paper pressing block is fixed on the flip cover, the flip cover is arranged on the upper part of the middle frame, the rubber roller is rotatably arranged on the flip cover, the paper pressing block forms a third frame wall and a fourth frame wall, the second supporting portion is formed on the outer side of the connecting corner of the third frame wall and the fourth frame wall, an acute angle is formed between the third frame wall and the fourth frame wall, when the flip cover is closed on the middle frame, the outer side surface of the fourth frame wall is a vertical plane, and the plane where the fourth frame wall is located is on the right side of the vertical section on the left side of the rubber roller, so that the paper is in an oblique paper guide direction; Slots are formed at both ends of the flip cover, and insert strips are formed on the outer sides of both ends of the paper pressing block, and the paper pressing block is clamped on the slots through the insert strips; The bottom of the paper pressing block is convexly arranged along the length direction to form a convex block, the flip cover is provided with a groove, the paper pressing block is provided with a clamping hole, the flip cover is formed with a buckle, the convex block is positioned and matched with the groove, and the buckle is clamped and matched with the clamping hole.

2. The paper feeding mechanism of the reverse bending channel according to claim 1, characterized in that: The height of the first supporting portion is higher than that of the second supporting portion, so that the formed paper feeding channel is V-shaped. Under the constraint of the paper feeding channel, the paper passing through the paper feeding channel is fed in a V-shape.

3. The paper feeding mechanism of the reverse bending channel according to claim 2, characterized in that: The turning points of the first support portion and the second support portion are both arc-shaped surfaces, and the middle frame forms an acute angle through the first frame wall and the second frame wall. The upper side of the corner where the first frame wall and the second frame wall are connected is the first support portion. When the diameter of the paper roll becomes smaller, the paper slides and fits on the outer sides of the first support portion and the second support portion.

4. The paper feeding mechanism of the reverse bending channel according to claim 3, characterized in that: The sensing mechanism includes a limit plate, a substrate is arranged on the limit plate, a sensor is arranged on the substrate, a clamping block is formed at one end of the limit plate, a through hole is provided on the second frame wall, the limit plate is obliquely arranged between the first frame wall and the second frame wall, the limit plate is plugged and fixed on the plug hole of the second frame wall through the clamping block, the other end of the limit plate is against the first frame wall, the sensor is located in the through hole facing the paper feeding channel, and the inclination angle of the limit plate is consistent with the angle of the second frame wall.

5. The paper feeding mechanism of the reverse bending channel according to claim 4, characterized in that: The printing mechanism includes a print head, a print head fixing plate, a push plate and a fixing plate, wherein the push plate is elastically connected to the fixing plate through a spring, the print head fixing plate is fixed on the push plate, the print head is fixed on the print head fixing plate, and the print head is located next to the rubber roller and cooperates with the paper feeding channel to print on the paper.

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