Miniature printer

Abstract

The utility model relates to the technical field of printers, in particular to a miniature printer. The miniature printer comprises a base, a cover body, a printing assembly and a paper pressing assembly, the paper pressing assembly comprises a supporting part and a paper pressing piece which are oppositely arranged, the supporting part is arranged on a machine core, the paper pressing piece is arranged on the cover body, a paper feeding gap is formed between the supporting part and the paper pressing piece, or the supporting part and the machine core jointly form the paper feeding gap with the paper pressing piece. The paper pressing piece comprises a pre-tightening part, the pre-tightening part is located on the upstream of the paper feeding gap in the paper feeding direction, the pre-tightening part protrudes towards the paper pressing piece, and before printing paper enters the paper feeding gap, the pre-tightening part applies certain pressure to the side face of the printing paper in the direction of the supporting part, so that the tension of the printing paper entering the paper feeding gap is increased; and the printing paper can be kept in a tightened state in the paper feeding gap, and shaking of the printing paper is avoided. The pre-tightening part is stable in structure, the stability of the pre-tightening force is guaranteed, the user experience of the miniprinter is improved, and the service life of the miniprinter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of printers, in particular to a micro printer. Background Art

[0002] At present, micro printers are widely used in bank ATMs, supermarket receipt printers, taxis and other places where data receipts need to be printed.

[0003] The micro printer includes a base, a cover and a printing assembly. The base is provided with a paper bin, in which a paper roll is placed. When the micro printer is working, the paper roll can rotate in the paper bin to release the printing paper. The printing assembly includes a movement and a rubber roller, wherein the rubber roller is arranged on the cover, and the movement is arranged on the base.

[0004] In addition, corresponding to the printing assembly, the micro printer is also provided with a paper pressing assembly, which is used to prevent the printing paper from shaking. In the prior art, the commonly used paper pressing assembly uses an elastic assembly that can rotate and elastically press the paper to cooperate with a rubber roller to apply a variable pressure to the printing paper to prevent the printing paper from shaking. However, as the use cycle increases, the pressure of the elastic assembly on the printing paper becomes unstable due to the change in the elastic force of the elastic assembly.

[0005] In order to solve the above problems, it is urgent to provide a micro printer to solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a micro printer, so that before the printing paper enters the paper feeding gap, the pre-tightening part applies a certain pressure to the side of the printing paper in the direction of the supporting part, increasing the tension of the printing paper entering the paper feeding gap, which is conducive to keeping the printing paper in a taut state in the paper feeding gap and avoiding the effect of shaking the printing paper. Moreover, the pre-tightening part will not change due to the use time of the micro printer, and the structure is stable, which is conducive to ensuring the stability of the pre-tightening force, thereby improving the user experience and service life of the micro printer.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] A micro printer comprises a base, a cover and a printing assembly, wherein the base is provided with a paper bin, a paper roll is placed in the paper bin, the cover is rotatably connected to the base, the printing assembly comprises a movement and a rubber roller, the rubber roller is arranged on the cover, the movement is arranged on the base, and the micro printer further comprises:

[0009] A paper pressing assembly, the paper pressing assembly includes a supporting portion and a paper pressing member that are relatively arranged, the supporting portion is arranged on the movement, and the paper pressing member is arranged on the cover body, a paper feeding gap is formed between the supporting portion and the paper pressing member, or a paper feeding gap is formed between the supporting portion and the movement together with the paper pressing member, the paper pressing member includes a pre-tightening portion, along the paper feeding direction, the pre-tightening portion is located upstream of the paper feeding gap, and the pre-tightening portion protrudes toward the direction of the paper pressing member, and the pre-tightening portion is configured to increase the tension of the printing paper entering the paper feeding gap.

[0010] As an optional solution, a mounting seat is provided on the cover body, the rubber roller is rotatably arranged on the mounting seat, and the pre-tightening portion is arranged on an end surface of the mounting seat facing the supporting portion.

[0011] As an optional solution, the thickness of the pre-tightening portion is greater than 0.1 mm.

[0012] As an optional solution, the gap size of the paper feeding gap is 0.15mm-0.3mm.

[0013] As an optional solution, a mounting seat is provided on the cover body, and the paper bin is arranged on the mounting seat. The mounting seat is provided with a supporting wall as the bottom of the paper bin, and the supporting wall extends toward the supporting portion and is spaced apart from the supporting portion. The printing paper extends from the supporting wall toward the supporting portion, and the pre-tightening portion is located above the supporting wall.

[0014] As an optional solution, a mounting seat is provided on the cover body, the rubber roller is rotatably arranged on the mounting seat, and the paper pressing member further includes:

[0015] A paper pressing plate is arranged at the bottom of the mounting seat, and the paper feeding gap is located between the paper pressing plate and the supporting part.

[0016] As an optional solution, two supporting walls are respectively arranged on the mounting seat along the extension direction of the rubber roller, the two ends of the rubber roller are rotatably arranged on the supporting walls, and the two ends of the paperboard are respectively connected to the two supporting walls.

[0017] As an optional solution, the paperboard is a plate-like structure.

[0018] As an optional solution, the cross-sectional shape of the paper pressing board is wedge-shaped, and the thickness of the paper pressing board gradually decreases along the paper feeding direction.

[0019] As an optional solution, the micro printer further includes:

[0020] A detection member, when a paper feeding gap is formed between the support portion and the paper pressing member, a sensing hole is provided on the support portion, and the position of the detection member is set corresponding to the sensing hole; when a paper feeding gap is formed between the support portion and the movement together with the paper pressing member, along the paper feeding direction, the paper pressing member is located upstream of the movement, and the detection member is located on the end surface of the movement facing the paper feeding gap.

[0021] The beneficial effects of the utility model are:

[0022] The utility model provides a micro printer, which comprises a base, a cover body, a printing assembly and a paper pressing assembly, wherein a paper bin is arranged in the base, a paper roll is placed in the paper bin, the cover body is rotatably connected with the base, the printing assembly comprises a movement and a rubber roller, the rubber roller is arranged on the cover body, the movement is arranged on the base, the paper pressing assembly comprises a supporting part and a paper pressing piece which are arranged relatively, the supporting part is arranged on the movement, the paper pressing piece is arranged on the cover body, a paper feeding gap is formed between the supporting part and the paper pressing piece, or a paper feeding gap is formed between the supporting part and the movement and the paper pressing piece together, the paper pressing piece comprises a pre-tightening part, along the paper feeding direction, the pre-tightening part is located at the upstream of the paper feeding gap, and the pre-tightening part protrudes in the direction of the paper pressing piece, because the supporting part in the paper feeding gap plays a stable supporting role for the printing paper, before the printing paper enters the paper feeding gap, the pre-tightening part applies a certain pressure to the side of the printing paper in the direction of the supporting part, thereby increasing the tension of the printing paper entering the paper feeding gap, which is beneficial to keep the printing paper in a taut state in the paper feeding gap, and avoids the printing paper from shaking. The pre-tightening part will not change due to the use time of the micro printer, and the structure is stable, which is conducive to ensuring the stability of the pre-tightening force, thereby improving the user experience and service life of the micro printer. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] 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.

[0024] Figure 1 It is a schematic diagram of the structure of a micro printer provided by an embodiment of the utility model;

[0025] Figure 2 It is a schematic cross-sectional structure diagram of a micro printer provided by an embodiment of the utility model;

[0026] Figure 3 yes Figure 2 A partial enlarged view of point A in the middle.

[0027] The following are marked in the figure:

[0028] 100, base; 110, paper bin; 111, supporting wall;

[0029] 200, cover body; 210, mounting seat;

[0030] 300, printing assembly; 310, movement; 320, rubber roller;

[0031] 400, paper pressing assembly; 410, supporting portion; 420, paper pressing member; 421, pre-tightening portion; 422, paper pressing board; 430, paper feeding gap;

[0032] 500. Paper roll; 510. Printing paper. DETAILED DESCRIPTION

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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" and "second" are only used to distinguish in the description and have no special meaning.

[0037] like Figure 1 As shown, the utility model provides a micro printer, which includes a base 100, a cover 200 and a printing assembly 300. Among them, a paper bin 110 is provided in the base 100, and a paper roll 500 is placed in the paper bin 110. When the micro printer is working, the paper roll 500 can rotate in the paper bin 110 to release the printing paper 510. The cover 200 is rotatably connected to the base 100. Opening or closing the cover 200 can facilitate the placement of the paper roll 500 in the paper bin 110, and also facilitate the assembly, detection, inspection and maintenance of the internal structure of the micro printer. Specifically, the printing assembly 300 includes a movement 310 and a rubber roller 320. The rubber roller 320 is arranged on the cover 200, and the movement 310 is arranged on the base 100. In the working state, the printing paper 510 passes between the movement 310 and the rubber roller 320, and the printing of the printing paper 510 has been completed.

[0038] See also Figure 2 and Figure 3 In one embodiment, the micro printer further includes a paper pressing assembly 400, which includes a supporting portion 410 and a paper pressing member 420 that are relatively arranged, the supporting portion 410 is arranged on the movement 310, and the paper pressing member 420 is arranged on the cover body 200, and a paper feeding gap 430 is formed between the supporting portion 410 and the paper pressing member 420, and the paper pressing member 420 includes a pre-tightening portion 421, and along the paper feeding direction, the pre-tightening portion 421 is located upstream of the paper feeding gap 430, and the pre-tightening portion 421 protrudes toward the direction of the paper pressing member 420. Since the support part 410 in the paper feeding gap 430 plays a role in stably supporting the printing paper 510, before the printing paper 510 enters the paper feeding gap 430, the pre-tightening part 421 applies a certain pressure to the side of the printing paper 510 in the direction of the support part 410, increasing the tension of the printing paper 510 entering the paper feeding gap 430, which is conducive to keeping the printing paper 510 in a taut state in the paper feeding gap 430 and preventing the printing paper 510 from shaking. The pre-tightening part 421 will not change due to the use time of the micro printer, and the structure is stable, which is conducive to ensuring the stability of the pre-tightening force, thereby improving the user experience and service life of the micro printer.

[0039] In another embodiment, the micro printer further includes a paper pressing assembly 400, which includes a supporting portion 410 and a paper pressing member 420 that are relatively arranged, wherein the supporting portion 410 is arranged on the movement 310, and the paper pressing member 420 is arranged on the cover body 200, and a paper feeding gap 430 is formed between the supporting portion 410 and the movement 310 and the paper pressing member 420, and the paper pressing member 420 includes a pre-tightening portion 421, and along the paper feeding direction, the pre-tightening portion 421 is located upstream of the paper feeding gap 430, and the pre-tightening portion 421 protrudes toward the direction of the paper pressing member 420. Since the support part 410 in the paper feeding gap 430 plays a role in stably supporting the printing paper 510, before the printing paper 510 enters the paper feeding gap 430, the pre-tightening part 421 applies a certain pressure to the side of the printing paper 510 in the direction of the support part 410, increasing the tension of the printing paper 510 entering the paper feeding gap 430, which is conducive to keeping the printing paper 510 in a taut state in the paper feeding gap 430 and preventing the printing paper 510 from shaking. The pre-tightening part 421 will not change due to the use time of the micro printer, and the structure is stable, which is conducive to ensuring the stability of the pre-tightening force, thereby improving the user experience and service life of the micro printer.

[0040] More specifically, the surface of the pre-tightening part 421 interacting with the printing paper 510 is provided with an arc-shaped fillet, or the pre-tightening part 421 has a certain width along the feeding direction of the printing paper 510, thereby increasing the interaction area between the pre-tightening part 421 and the printing paper 510, which is beneficial to reducing the pressure per unit area of ​​the printing paper 510 exerted by the pre-tightening part 421, avoiding damage to the printing paper 510, and at the same time, it is beneficial to reducing the resistance of the printing paper 510 during the feeding process, preventing the printing paper 510 from shaking. In one embodiment, along the feeding direction of the printing paper 510, the fillet radius of the upstream of the pre-tightening part 421 is 4mm-10mm, so that the position where the printing paper 510 is subjected to the pressure of the pre-tightening part 421 is an arc-shaped structure, reducing the pressure exerted on the unit area of ​​the printing paper 510. In another embodiment, along the feeding direction of the printing paper 510, the width of the pre-tightening part 421 can be 1mm-10mm, and this embodiment does not specifically limit this.

[0041] Optionally, the gap size of the paper feeding gap 430 is 0.15 mm-0.3 mm, that is, the paper feeding gap 430 is reduced as much as possible, which is beneficial to improving the stability of the movement of the printing paper 510 in the paper feeding gap 430 and reducing jitter.

[0042] In addition, the micro printer further includes a detection member. When a paper feed gap 430 is formed between the support portion 410 and the paper pressing member 420, a sensing hole is provided on the support portion 410, and the position of the detection member is set corresponding to the sensing hole. When the paper feed gap 430 is formed between the support portion 410 and the movement 310 together with the paper pressing member 420, along the paper feed direction, the paper pressing member 420 is located upstream of the movement 310, and the detection member is located on the end surface of the movement 310 facing the paper feed gap 430. The detection member is used to detect the signal of the printing paper 510 in the paper feed gap 430 to determine whether there is still printing paper 510 in the paper bin 110, so as to remind the user to add paper in time. In this embodiment, by providing the pre-tightening portion 421, it is beneficial to improve the stability of the signal detected by the detection member and reduce the error rate of reporting paper shortage.

[0043] As an optional solution, a mounting seat 210 is provided on the cover body 200, and the rubber roller 320 is rotatably disposed on the mounting seat 210. The pre-tightening portion 421 is disposed on the end surface of the mounting seat 210 facing the supporting portion 410. The pre-tightening portion 421 is disposed by utilizing the existing mounting seat 210 structure, which is beneficial to simplifying the overall structure of the micro printer and reducing costs.

[0044] Optionally, the thickness of the pre-tightening portion 421 is greater than 0.1 mm to ensure the pre-tightening force of the pre-tightening portion 421 on the printing paper 510, avoiding insufficient pre-tightening force due to the small thickness of the pre-tightening portion 421, which is beneficial to improving the stability of the paper feeding process of the printing paper 510 and avoiding the shaking of the printing paper 510.

[0045] Optionally, the paper bin 110 is set on the mounting base 210, and the mounting base 210 is provided with a supporting wall 111 as the bottom of the paper bin 110, the supporting wall 111 extends toward the support portion 410 and is spaced apart from the support portion 410, and the printing paper 510 extends from the supporting wall 111 toward the support portion 410 for paper feeding, and the pre-tightening portion 421 is located above the supporting wall 111, that is, while the pre-tightening portion 421 applies pressure to the printing paper 510, the supporting wall 111 can provide support for the printing paper 510, which is beneficial to increase the pre-tightening force, thereby improving the stability of the printing paper 510 in feeding and reducing jitter.

[0046] Furthermore, the paper pressing member 420 also includes a paper pressing plate 422, which is arranged at the bottom of the mounting seat 210, and the paper feeding gap 430 is located between the paper pressing plate 422 and the supporting part 410, thereby increasing the size of the paper feeding gap 430 along the paper feeding direction, which is beneficial to improving the stability of paper feeding.

[0047] In order to ensure that the mounting seat 210 supports the rubber roller 320, it is understood that two supporting walls are respectively provided on the mounting seat 210 along the extension direction of the rubber roller 320, and the two ends of the rubber roller 320 are rotatably provided on the supporting walls. In this embodiment, the two ends of the paper pressing plate 422 are respectively connected to the two supporting walls, that is, the structure of the paper pressing plate 422 is designed by utilizing the existing structure of the mounting seat 210, which is conducive to simplifying the structure and reducing the cost of the micro printer.

[0048] In one embodiment, the cross-sectional shape of the paper pressing plate 422 is wedge-shaped, and the thickness of the paper pressing plate 422 gradually decreases along the paper feeding direction, which is beneficial to improving the structural stability of the paper pressing plate 422. Optionally, according to the use environment of the micro printer, along the paper feeding direction, the paper pressing plate 422 with a wedge structure can be used to set the gap size of the paper feeding gap 430 to be small upstream and large downstream, thereby further improving the paper feeding force of the printing paper 510, improving the stability of the printing paper 510, and reducing jitter.

[0049] In another embodiment, the paper pressing board 422 is a plate-shaped structure, and the paper pressing board 422 has a simple structure and is easy to assemble.

[0050] 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 micro printer, comprising a base (100), a cover (200) and a printing assembly (300), wherein: The base (100) is provided with a paper bin (110), a paper roll (500) is placed in the paper bin (110), the cover (200) is rotatably connected to the base (100), the printing assembly (300) comprises a movement (310) and a rubber roller (320), the rubber roller (320) is arranged on the cover (200), and the movement (310) is arranged on the base (100), characterized in that the micro printer further comprises: A paper pressing assembly (400), the paper pressing assembly (400) comprising a supporting portion (410) and a paper pressing member (420) which are arranged opposite to each other, the supporting portion (410) being arranged on the movement (310), the paper pressing member (420) being arranged on the cover body (200), a paper feeding gap (430) being formed between the supporting portion (410) and the paper pressing member (420), or a paper feeding gap (430) being formed between the supporting portion (410) and the movement (310) and the paper pressing member (420), the paper pressing member (420) comprising a pre-tightening portion (421), the pre-tightening portion (421) being located upstream of the paper feeding gap (430) along the paper feeding direction, and the pre-tightening portion (421) protruding in the direction of the paper pressing member (420), the pre-tightening portion (421) being configured to increase the tension of the printing paper (510) entering the paper feeding gap (430).

2. The micro printer according to claim 1, characterized in that: A mounting seat (210) is provided on the cover body (200), the rubber roller (320) is rotatably arranged on the mounting seat (210), and the pre-tightening portion (421) is arranged on the end surface of the mounting seat (210) facing the support portion (410).

3. The micro printer according to claim 1, characterized in that: The thickness of the pre-tightening portion (421) is greater than 0.1 mm.

4. The micro printer according to claim 1, characterized in that: The gap size of the paper feeding gap (430) is 0.15mm-0.3mm.

5. The micro printer according to any one of claims 1 to 4, characterized in that: A mounting seat (210) is provided on the cover body (200), and the paper bin (110) is arranged on the mounting seat (210). The mounting seat (210) is provided with a supporting wall (111) as the bottom of the paper bin (110), and the supporting wall (111) extends toward the supporting portion (410) and is spaced apart from the supporting portion (410). The printing paper (510) extends from the supporting wall (111) toward the supporting portion (410), and the pre-tightening portion (421) is located above the supporting wall (111).

6. The micro printer according to any one of claims 1 to 4, characterized in that: The cover body (200) is provided with a mounting seat (210), the rubber roller (320) is rotatably arranged on the mounting seat (210), and the paper pressing member (420) further comprises: A paper pressing plate (422) is arranged at the bottom of the mounting seat (210), and the paper feeding gap (430) is located between the paper pressing plate (422) and the supporting portion (410).

7. The micro printer according to claim 6, characterized in that: Two support walls are respectively arranged on the mounting seat (210) along the extension direction of the rubber roller (320), the two ends of the rubber roller (320) are rotatably arranged on the support walls, and the two ends of the paper pressing plate (422) are respectively connected to the two support walls.

8. The micro printer according to claim 6, characterized in that: The paperboard (422) is a plate-like structure.

9. The micro printer according to claim 6, characterized in that: The cross-sectional shape of the paper pressing paper (422) is wedge-shaped, and the thickness of the paper pressing paper (422) gradually decreases along the paper feeding direction.

10. The micro printer according to any one of claims 1 to 4, characterized in that: The micro printer also includes: The detection member comprises a detection member, wherein when a paper feeding gap (430) is formed between the support portion (410) and the paper pressing member (420), a sensing hole is provided on the support portion (410), and the position of the detection member is arranged corresponding to the sensing hole; when a paper feeding gap (430) is formed between the support portion (410) and the movement (310) together with the paper pressing member (420), along the paper feeding direction, the paper pressing member (420) is located upstream of the movement (310), and the detection member is located on the end surface of the movement (310) facing the paper feeding gap (430).

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