Printer and paper limiting device

Abstract

The utility model discloses a printer and a paper limiting device, including a middle cover and a middle shell, wherein the bottom surface of the middle cover is provided with an upper paper guide surface, the upper surface of the middle shell is provided with a lower paper guide surface adapted to the upper paper guide surface, two paper limiting parts are installed on the middle shell, and the middle shell is also provided with an adjustment drive assembly for driving the two paper limiting parts to move closer to each other or away from each other, the upper surface of the paper limiting part is convexly provided to extend into the concave part of the middle cover, and the top height of the paper limiting part is higher than the upper paper guide surface. The utility model convexly provides a concave part extending to the middle cover on the upper surface of the paper limiting part, so that the height of the upper surface of the paper limiting part is higher than the upper paper guide surface, ensuring that when the paper is improperly placed or the stacking height exceeds the limit, the paper can still be effectively limited to the limited area of ​​the paper limiting part; thereby preventing paper escape and printing deviation, and significantly improving the accuracy and consistency of printing.

Description

Technical Field

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

[0002] In the field of printing equipment, the paper limiter of the printer is a key component to ensure the correct position of the printed paper during the printing process. The traditional paper limiter is mainly designed to limit the movement of the paper in the left and right directions to ensure the accuracy and consistency of printing. However, this design is inadequate when dealing with paper placement issues in specific operating scenarios.

[0003] Specifically, when the operator places the paper, if the paper is not placed parallel to the printer, or the stacking height of the paper exceeds the design limit of the printer, the paper limiter will not work effectively. This is because there is usually a certain gap between the paper limiter and the middle cover. When the height of the paper exceeds the height of the side wall of the paper limiter, this gap becomes a potential paper escape channel. During the printing process, the paper may be brought into this gap, causing the paper limiter to lose its proper limiting function.

[0004] This design deficiency can lead to a series of problems. First, the paper may escape from the paper limiter, causing the print to deviate and affecting the print quality. Second, the escaped paper may also cause internal blockage of the printer or even damage other parts of the printer, increasing maintenance costs and equipment failure rates.

[0005] Therefore, in order to solve the shortcomings of the paper limiting mechanism in the prior art in specific operating scenarios and improve the stability and printing quality of the printer, this patent proposes an improved paper limiting mechanism design, which aims to solve the problems of paper escape and print deviation when the paper is placed improperly or the stacking height exceeds the limit. Utility Model Content

[0006] The utility model aims to overcome the shortcomings of the prior art and provide a printer and a paper limiting device.

[0007] The purpose of the utility model is achieved through the following technical solutions:

[0008] A paper limiting device comprises a middle cover and a middle shell, wherein the bottom surface of the middle cover is provided with an upper paper guide surface, the upper surface of the middle shell is provided with a lower paper guide surface adapted to the upper paper guide surface, two paper limiting parts are installed on the middle shell, and the middle shell is also provided with an adjustment drive assembly for driving the two paper limiting parts to move toward each other or away from each other, the upper surfaces of the paper limiting parts are convexly arranged to extend into the recessed portion of the middle cover, and the top height of the paper limiting parts is higher than the upper paper guide surface.

[0009] Preferably, it also includes a protrusion arranged on the upper surface of the paper limiting member and a groove located on the bottom surface of the middle cover and adapted thereto, the paper limiting member includes a transverse plate and a longitudinal plate, the transverse plate and the longitudinal plate are vertically distributed, and the protrusion is located on the upper surface of the longitudinal plate.

[0010] Preferably, the transverse plate comprises a first guide plate fixedly connected to the adjustment drive assembly, and a second guide plate bent downward is provided at the paper inlet of the first guide plate.

[0011] Preferably, the longitudinal plate includes a first limiting paperboard fixedly mounted on the upper edge of the transverse plate, a second limiting paperboard extending outwardly is provided at the paper inlet of the first limiting paperboard, and the protrusion is located on the upper surface composed of the first limiting paperboard and the second limiting paperboard.

[0012] Preferably, the adjustment drive assembly includes two slide grooves opened on the upper surface of the middle shell, and the first rack and the second rack are slidably installed in the two slide grooves respectively, and the two paper limiting parts can be removably and fixedly installed on the first rack and the second rack respectively. A gear is also installed in the middle cover, and the gear is located between the first rack and the second rack and is meshed with both of them.

[0013] Preferably, the gear is a damping gear.

[0014] Preferably, the protrusion includes a lower transition surface located on the longitudinal plate, and the longitudinal plate on the side of the lower transition surface close to the paper inlet direction is respectively provided with a first lower convex surface, a lower concave surface and a second lower convex surface, and the heights of the first lower convex surface, the lower concave surface and the second lower convex surface are all higher than the paper guide surface of the middle cover and a circular arc transition is made between them.

[0015] Preferably, the first lower convex surface is located between the lower transition surface and the lower concave surface, the lower concave surface is located between the first lower convex surface and the second lower convex surface, and the height of the lower concave surface is lower than the heights of the first lower convex surface and the second lower convex surface.

[0016] Preferably, the groove includes an upper transition surface located on the paper guide surface of the middle cover and parallel to the lower transition surface, and is also provided with an upper concave surface adapted to the first lower convex surface and an upper convex surface adapted to the lower concave surface.

[0017] The utility model also discloses a printer, comprising any one of the above-mentioned paper limiting devices.

[0018] The utility model has the following advantages:

[0019] 1. The utility model provides a recessed portion extending to the middle cover on the upper surface of the paper limiter, so that the height of the upper surface of the paper limiter is higher than the upper paper guide surface, ensuring that when the paper is improperly placed or the stacked paper height exceeds the limit, the paper can still be effectively limited to the limited area of ​​the paper limiter. This design effectively solves the problem that the traditional paper limiter mechanism cannot effectively limit the paper in specific operating scenarios, thereby preventing paper escape and printing deviation, and significantly improving the accuracy and consistency of printing.

[0020] 2. The utility model significantly reduces the risk of printer internal blockage and component damage caused by paper escape or printing deviation. This not only reduces the maintenance cost of the printer, but also improves the stability and reliability of the equipment and extends the service life of the printer.

[0021] 3. The utility model can mesh the gear with the first rack and the second rack to move the two paper limiting parts synchronously, so that the two paper limiting parts move closer to or away from each other to adapt to printing papers of different widths, thereby improving the practicality of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the middle cover and the middle shell of the utility model in the open state.

[0023] Figure 2 It is a schematic diagram of the middle cover and the middle shell of the utility model in the closed state facing the printing port.

[0024] Figure 3 This is a schematic diagram of the regulating drive structure of the utility model.

[0025] Figure 4 It is a structural schematic diagram of the utility model in an assembled state with the first rack and one of the paper limiting parts.

[0026] Figure 5 It is a top view schematic diagram of the middle shell, the adjustment drive assembly and the paper limiting component of the utility model in the assembled state.

[0027] Figure 6 It is a bottom view of the middle cover of the utility model.

[0028] Figure 7 It is a cross-sectional schematic diagram of the printing paper of the utility model being limited in a high position state.

[0029] Figure 8 It is a schematic diagram of the cross-sectional structure of the printing paper of the utility model being limited in a low position state.

[0030] Fig. 9 For the utility model Figure 7 Enlarged schematic diagram at point A in the middle.

[0031] In the figure, 1, middle cover; 2, middle shell; 3, adjustment drive assembly; 31, slide groove; 32, first rack; 33, second rack; 34, gear; 4, paper limiting member; 41, horizontal plate; 411, first guide plate; 412, second guide plate; 42, longitudinal plate; 421, first paper limiting board; 422, second paper limiting board; 5, groove; 51, upper transition surface; 52, upper concave surface; 53, upper convex surface; 6, protrusion; 61, lower transition surface; 62, first lower convex surface; 63, lower concave surface; 64, second lower convex surface; 7, upper paper guide surface; 8, lower paper guide surface. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical scheme and advantages of the embodiments of the present invention clearer, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" 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 it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] like Figure 1 — Fig. 9 The embodiment shown.

[0035] A paper limiting device comprises a middle cover 1 and a middle shell 2, wherein the bottom surface of the middle shell 2 is provided with an upper paper guide surface 7, and the upper surface of the middle shell 2 is provided with a lower paper guide surface 8 adapted to the upper paper guide surface 7, two paper limiting parts 4 are installed on the middle shell 2, and the middle shell 2 is also provided with an adjustment drive assembly 3 for driving the two paper limiting parts 4 to move toward each other or away from each other, the upper surface of the paper limiting part 4 is convexly extended into the recessed part of the middle cover 1, and the top height of the paper limiting part 4 is higher than the upper paper guide surface 7.

[0036] It also includes a protrusion 6 arranged on the upper surface of the paper limiting member 4 and a groove 5 located on the bottom surface of the middle cover 1 and adapted to the protrusion 6. The paper limiting member 4 includes a horizontal plate 41 and a vertical plate 42. The horizontal plate 41 and the vertical plate 42 are vertically distributed. The protrusion 6 is located on the upper surface of the vertical plate 42. Figure 1 , Figure 7 and Figure 8 As shown, the middle cover 1 and the middle shell 2 are rotatably connected, the height of the protrusion 6 is higher than the upper paper guide surface 7 of the middle cover 1, that is, the protrusion 6 is sunken into the groove 5, and the gap between the paper limiting member 4 and the middle cover 1 is an uneven curved surface, so that at the same height, the paper is always located in the paper feeding channel composed of the upper paper guide surface 7, the lower paper guide surface 8 and the two paper limiting members 4 and is limited by the two paper limiting members 4. No matter what height the printing paper is at, it can be limited by the two paper limiting members 4 in the paper feeding channel and will never run out of the gap between the paper limiting member 4 and the middle cover 1, which has a better limiting effect, ensuring that the printing is centered and there will be no unilateral deviation.

[0037] In this embodiment, the transverse plate 41 and the longitudinal plate 42 are integrally formed, and the longitudinal plate 42 is located at an edge of the transverse plate 41 away from the center.

[0038] The transverse plate 41 includes a first guide plate 411 fixedly connected to the adjustment drive assembly 3 , and a second guide plate 412 bent downward is provided at the paper inlet of the first guide plate 411 .

[0039] The longitudinal plate 42 includes a first limiting paperboard 421 fixedly mounted on the edge of the upper surface of the transverse plate 41 , a second limiting paperboard 422 extending outward is provided at the paper inlet of the first limiting paperboard 421 , and the protrusion 6 is located on the upper surface composed of the first limiting paperboard 421 and the second limiting paperboard 422 .

[0040] See also Figures 1 to 9 As shown, by bending the second guide plate 412 downward and expanding the second limiting paperboard 422 outward, the paper inlet is made larger, making it easier for paper to enter the printer; in this embodiment, the curvature of the bending and outward expansion can be designed according to actual needs and is not limited here.

[0041] The adjustment drive assembly 3 includes two slide grooves 31 opened on the upper surface of the middle shell 2, and the first rack 32 and the second rack 33 are slidably installed in the two slide grooves 31 respectively. The two paper limiting parts 4 can be detachably fixed on the first rack 32 and the second rack 33 respectively. A gear 34 is also installed in the middle shell 2, and the gear 34 is located between the first rack 32 and the second rack 33 and meshes with both of them; the gear 34 is a damping gear.

[0042] See also Figure 1 and Figure 3As shown, the gear 34 is located between the first rack 32 and the second rack 33 and meshes with the two. When one of the two paper limiting members 4 is adjusted to move, the other paper limiting member 4 also moves synchronously. Through the coordinated transmission between the first rack 32, the second rack 33 and the gear 34, the two paper limiting members 4 can move closer to and away from each other.

[0043] Specifically, in the present embodiment, the ends of the first rack 32 and the second rack 33 are fixedly connected to the transverse plate 41 in the paper limiting member 4 at the corresponding position. For this reason, the two transverse plates 41 approach or move toward each other, thereby also driving the two longitudinal plates 42 to approach or move away from each other, thereby changing the size between the two longitudinal plates 42, so that it can limit the paper of different widths.

[0044] When paper is fed from the entrance, in order to prevent the paper from deviating, force is applied to the longitudinal plates 42 on both sides to change their positions. In the present embodiment, the gear 34 is a damping gear, that is, if the distance between the two longitudinal plates 42 needs to be changed, a certain force needs to be applied to move them. For this reason, the force of the damping gear is greater than the force of the paper deviation acting on the longitudinal plates 42 on both sides.

[0045] The protrusion 6 includes a lower transition surface 61 located on the longitudinal plate 42, and a first lower convex surface 62, a lower concave surface 63 and a second lower convex surface 64 are respectively provided on the longitudinal plate 42 on the side of the lower transition surface 61 close to the paper inlet direction. The heights of the first lower convex surface 62, the lower concave surface 63 and the second lower convex surface 64 are all higher than the paper guide surface of the middle cover 1 and a circular arc transition is formed between them.

[0046] The first lower convex surface 62 is located between the lower transition surface 61 and the lower concave surface 63 , the lower concave surface 63 is located between the first lower convex surface 62 and the second lower convex surface 64 , and the height of the lower concave surface 63 is lower than that of the first lower convex surface 62 and the second lower convex surface 64 .

[0047] The groove 5 includes an upper transition surface 51 located on the paper guide surface of the middle cover 1 and parallel to the lower transition surface 61 , and is also provided with an upper concave surface 52 adapted to the first lower convex surface 62 and an upper convex surface 53 adapted to the lower concave surface 63 .

[0048] See also Figures 7 to 9 As shown, Figure 7 The display shows that the paper at a higher position is restricted when it enters the paper feed channel through the paper feed port. Figure 8What is shown is the situation where the paper is limited when entering the paper feed channel at a lower position. It can be seen from the figure that the paper can be limited by the two longitudinal plates 42 regardless of whether it is at a higher position or a lower position; specifically, through the cooperation between the first lower convex surface 62 and the upper concave surface 52, and the cooperation between the lower concave surface 63 and the upper convex surface 53, the paper feed channel composed of the upper paper guide surface 7, the lower paper guide surface 8 and the two paper limiting parts 4 can be blocked by the longitudinal plates 42 on any horizontal plane, and will not enter the gap between the longitudinal plates 42 and the middle cover 1, thereby limiting the printing paper and preventing the printing paper from entering the gap between the longitudinal plates 42 and the middle cover 1.

[0049] In this embodiment, arc transitions are performed between the upper transition surface 51, the upper concave surface 52 and the upper convex surface 53 to prevent sharp protrusions from damaging the paper.

[0050] The utility model also discloses a printer, comprising any one of the above-mentioned paper limiting devices.

[0051] The working process of the utility model is as follows: since the height of the protrusion 6 on the longitudinal plate 42 is higher than the upper paper guide surface 7, in the paper feed channel composed of the upper paper guide surface 7, the lower paper guide surface 8, the two transverse plates 41 and the two longitudinal plates 42, the longitudinal plate 42 can block and limit the paper on any plane, so that the paper will not enter the gap between the longitudinal plate 42 and the middle cover 1. Specifically, before use, the spacing between the two longitudinal plates 42 can be adjusted by the gear 34 and the first rack 32 and the second rack 33 meshing transmission. After the adjustment is completed, the paper can enter the paper feed channel through the entrance and its position can be limited to provide paper for printing.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A paper limiting device, comprising a middle cover (1) and a middle shell (2), wherein the bottom surface of the middle cover (1) is provided with an upper paper guide surface (7), and the upper surface of the middle shell (2) is provided with a lower paper guide surface (8) adapted to the upper paper guide surface (7), characterized in that: Two paper limiting members (4) are mounted on the middle shell (2), and an adjusting driving assembly (3) for driving the two paper limiting members (4) to move toward each other or away from each other is also mounted on the middle shell (2), the upper surface of the paper limiting member (4) is convexly arranged to extend into the concave portion of the middle cover (1), and the top of the paper limiting member (4) is higher than the upper paper guide surface (7).

2. A paper limiting device according to claim 1, characterized in that: It also includes a protrusion (6) arranged on the upper surface of the paper limiting member (4) and a groove (5) located on the bottom surface of the middle cover (1) and adapted to the (6). The paper limiting member (4) includes a transverse plate (41) and a longitudinal plate (42). The transverse plate (41) and the longitudinal plate (42) are vertically arranged. The protrusion (6) is located on the upper surface of the longitudinal plate (42).

3. A paper limiting device according to claim 2, characterized in that: The transverse plate (41) comprises a first guide plate (411) fixedly connected to the adjustment drive assembly (3), and a second guide plate (412) bent downward is provided at the paper inlet of the first guide plate (411).

4. A paper limiting device according to claim 2, characterized in that: The longitudinal plate (42) comprises a first limiting paperboard (421) fixedly mounted on the edge of the upper surface of the transverse plate (41); a second limiting paperboard (422) extending outward is arranged at the paper inlet of the first limiting paperboard (421); and the protrusion (6) is located on the upper surface formed by the first limiting paperboard (421) and the second limiting paperboard (422).

5. A paper limiting device according to claim 1, characterized in that: The adjustment drive assembly (3) comprises two slide grooves (31) provided on the upper surface of the middle shell (2), a first rack (32) and a second rack (33) being slidably mounted in the two slide grooves (31) respectively, the two paper limiting members (4) being detachably and fixedly mounted on the first rack (32) and the second rack (33) respectively, the middle shell (2) also being provided with a gear (34), the gear (34) being located between the first rack (32) and the second rack (33) and being meshed with both.

6. A paper limiting device according to claim 5, characterized in that: The gear (34) is a damping gear.

7. A paper limiting device according to claim 2, characterized in that: The protrusion (6) comprises a lower transition surface (61) located on the longitudinal plate (42); a first lower convex surface (62), a lower concave surface (63) and a second lower convex surface (64) are respectively arranged on the longitudinal plate (42) on the side of the lower transition surface (61) close to the paper inlet direction; the heights of the first lower convex surface (62), the lower concave surface (63) and the second lower convex surface (64) are all higher than the paper guide surface of the middle cover (1) and arc transition is formed between them.

8. A paper limiting device according to claim 7, characterized in that: The first lower convex surface (62) is located between the lower transition surface (61) and the lower concave surface (63), the lower concave surface (63) is located between the first lower convex surface (62) and the second lower convex surface (64), and the height of the lower concave surface (63) is lower than the heights of the first lower convex surface (62) and the second lower convex surface (64).

9. A paper limiting device according to claim 7, characterized in that: The groove (5) comprises an upper transition surface (51) located on the paper guide surface of the middle cover (1) and parallel to the lower transition surface (61), and is also provided with an upper concave surface (52) adapted to the first lower convex surface (62) and an upper convex surface (53) adapted to the lower concave surface (63).

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

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