A printer capable of realizing two modes of paper feeding

Abstract

The utility model discloses a kind of printer of realizing two kinds of front and rear paper feeding mode, its technical solution main points include printer body, the two ends of printer body are respectively provided with first paper feed port and second paper feed port, paper feed roller is equipped in printer body, first paper feed sensor and second paper feed sensor for detecting paper feeding direction are further provided, first paper feed sensor and second paper feed sensor are located between first paper feed port and second paper feed port, paper feed roller is located between first paper feed sensor and second paper feed sensor, further include the driving assembly for driving paper feed roller rotation, driving assembly controls paper feed roller direct current or inversion according to paper feeding direction;The utility model breaks the limitation of the single fixed paper feed port of existing printer, a machine can realize two kinds of front and rear paper feeding mode, meet the different use habits of user, effectively solve the problem of poor space adaptability of existing printer, improve the use convenience of printer in different scenarios.

Description

Technical Field

[0001] This utility model relates to the field of printer technology, and more specifically to a printer capable of feeding paper in both front and rear directions. Background Technology

[0002] Currently, the paper feeding methods of mainstream printers on the market are characterized by simplicity and fixedness, and can be mainly divided into two categories: one is the built-in paper tray type paper feeding structure, which has a dedicated paper tray inside the printer body, and the paper roll is pre-placed in the paper tray when in use; the other is the external single-end paper feeding structure, which does not have a built-in paper tray or only has a small auxiliary paper tray depending on the needs, and mainly relies on external printing paper to be manually or automatically fed in from a fixed port of the machine body (such as the front paper inlet or the rear paper inlet). After the paper completes the printing of images and text by the printing component, it is output from the fixed paper outlet opposite to the paper inlet.

[0003] However, existing printers with fixed paper feed ports still have significant technical limitations. On the one hand, the fixed paper feed port makes the printer less adaptable to different spaces. On the other hand, a single paper feed direction cannot meet the diverse printing needs and usage habits of users, resulting in a decline in user experience. Utility Model Content

[0004] To solve the above problems, this utility model provides the following technical solution:

[0005] A printer capable of feeding paper in both forward and reverse directions includes a printer body with a first paper inlet and a second paper inlet at opposite ends. The printer body contains a paper feed roller and is further equipped with a first paper feed sensor and a second paper feed sensor for detecting the paper feed direction. The first and second paper feed sensors are located between the first and second paper inlets, and the paper feed roller is located between the first and second paper feed sensors. The printer also includes a drive assembly for driving the paper feed roller to rotate, which controls the paper feed roller to rotate forward or backward according to the paper feed direction.

[0006] The present invention is further configured such that: an inkjet cartridge is provided inside the printer body, and the paper feed roller and the inkjet cartridge are located between the first paper feed sensor and the second paper feed sensor.

[0007] The present invention is further configured such that: a paper tray is provided between the first paper inlet and the paper feed roller and / or between the second paper inlet and the paper feed roller, and the printer body is detachably connected to a back plate on one side of the paper tray.

[0008] The present invention is further configured such that: the back plate includes a connecting plate and a cover plate, the connecting plate is fixed to the printer body, the cover plate is detachably connected to the connecting plate, and the connecting plate has an opening for exposing the paper tray.

[0009] The present invention is further configured such that: the connecting plate is provided with a plurality of positioning grooves, the cover plate protrudes from one side of the connecting plate with a plurality of positioning posts corresponding to the positioning grooves, the inner sidewall of the positioning groove is provided with a stepped surface, the sidewall of the positioning post is provided with a hook, and when the positioning post is inserted into the positioning groove, the hook engages with the stepped surface.

[0010] The present invention is further configured such that: a micro switch for detecting whether the cover plate is installed in place is provided in the printer body; a clearance hole is provided on the connecting plate corresponding to the position of the micro switch; an abutment post protrudes from the side of the cover plate facing the connecting plate; when the cover plate is installed on the connecting plate, the abutment post passes through the clearance hole to trigger the micro switch.

[0011] The present invention is further configured such that: a notch for lifting the cover is provided on the side wall of the cover plate, and a foot pad is provided on the side of the cover plate away from the connecting plate.

[0012] The present invention is further configured such that: a panel is provided on one side of the printer body, and a semi-transparent viewing window is provided on the panel, the viewing window being used to observe the working status of the inkjet cartridge.

[0013] Compared with the prior art, the present invention has at least the following advantages:

[0014] 1. It features two paper feed ports. When paper is fed into one port, the other port is used for paper output. In conjunction with the first paper feed sensor, the second paper feed sensor, and the reversible paper feed roller, it breaks the limitation of the fixed single paper feed port of existing printers. One machine can realize two paper feeding methods, front and rear, to meet different user habits. At the same time, it effectively solves the problem of poor space adaptability of existing printers, greatly improves the convenience of using the printer in different scenarios, and broadens its application range.

[0015] 2. The back panel is split into a connecting plate and a removable cover plate. The connecting plate has an opening to expose the paper tray. When a paper roll needs to be placed, simply remove the cover plate. The opening only exposes the paper tray and does not expose other internal components of the printer, thus improving operational efficiency and equipment structural stability.

[0016] 3. The micro switch, in conjunction with the abutment post and clearance hole, enables precise detection of the cover plate's installation status. When the cover plate is not installed in place, the abutment post cannot trigger the micro switch, allowing the printer to stop working or issue a warning, thus improving the safety and reliability of printer use.

[0017] 4. The semi-transparent viewing window on the panel allows users to visually observe the working status of the inkjet cartridges without disassembling the printer, solving the problem that existing printers cannot check the working status of the internal inkjet cartridges. Attached Figure Description

[0018] Figure 1 This is an overall schematic diagram of the printer body in this embodiment;

[0019] Figure 2 This is a second-view view of the printer itself;

[0020] Figure 3 This is a diagram of the internal structure of the printer body from the front.

[0021] Figure 4 This is a diagram of the internal structure of the printer body on the back.

[0022] Figure 5 This is a schematic diagram of the paper feed sensor.

[0023] Figure 6 This is a view of the back of the printer.

[0024] Figure 7 This is a diagram showing the cover plate being removed;

[0025] Figure 8 This is a schematic diagram showing the side of the cover plate facing the connecting plate.

[0026] Explanation of reference numerals in the attached figures:

[0027] 1. Printer body; 2. First paper inlet; 3. Second paper inlet; 4. Paper feed roller; 5. First paper feed sensor; 6. Second paper feed sensor; 7. Inkjet cartridge; 8. Paper tray; 9. Connecting plate; 10. Cover plate; 11. Opening; 12. Positioning groove; 13. Positioning post; 14. Stepped surface; 15. Hook; 16. Micro switch; 17. Clearance hole; 18. Abutment post; 19. Lifting cover notch; 20. Foot pad; 21. Panel; 22. Viewing window. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. The components of the embodiments of this utility model described and shown in the accompanying drawings can typically be arranged and designed in various different configurations.

[0029] like Figure 1 and Figure 2As shown, a printer capable of feeding paper in two ways, front and rear, includes a printer body 1. The printer body 1 has a first paper inlet 2 and a second paper inlet 3 at opposite ends. The first paper inlet 2 is provided on the side wall of the front end (the end with the charging interface), and the second paper inlet 3 is provided on the side wall of the rear end. The first paper inlet 2 and the second paper inlet 3 are the same size and aligned with each other, so that the paper feeding path is a horizontal straight line.

[0030] like Figures 3 to 5 As shown, the printer body 1 is provided with a paper feed roller 4, and also with a first paper feed sensor 5 and a second paper feed sensor 6 for detecting the paper feed direction. The first paper feed sensor 5 and the second paper feed sensor 6 are located between the first paper feed port 2 and the second paper feed port 3. The paper feed roller 4 is located between the first paper feed sensor 5 and the second paper feed sensor 6. It also includes a drive assembly for driving the paper feed roller 4 to rotate. The drive assembly controls the paper feed roller 4 to rotate forward or backward according to the paper feed direction.

[0031] The paper feed roller 4 includes two parallel rubber rollers that hold and transport printing paper. One of the rubber rollers is the drive roller. The drive assembly includes a drive motor and a gear set. The drive roller is connected to the gear set, and the drive motor drives the drive roller to rotate through the gear set. The printer body 1 has a control board. The first paper feed sensor 5, the second paper feed sensor 6, and the drive motor are all connected to the control board. When paper is fed from the first paper feed port 2, the first paper feed sensor 5 detects the paper and transmits a signal to the control board. The control board then controls the drive motor to drive the paper feed roller 4 to rotate forward. Conversely, when paper is fed from the second paper feed port 3, the second paper feed sensor 6 detects the paper and transmits a signal to the control board. The control board then controls the drive motor to drive the paper feed roller 4 to rotate in reverse.

[0032] The printer body 1 contains an inkjet cartridge 7, with the paper feed roller 4 positioned between the first paper feed sensor 5 and the second paper feed sensor 6. As the paper passes under the inkjet cartridge 7, the cartridge 7 swings to print an image on the paper. When the paper feed direction is reversed, the inkjet cartridge 7 can be controlled by a background program to switch the printing direction accordingly. Since both paper feed directions share a single set of paper feed rollers 4, when the paper enters from the first paper inlet 2, it first passes the paper feed roller 4 and then the inkjet cartridge 7; when it enters from the second paper inlet 3, it first passes the inkjet cartridge 7 and then contacts the paper feed roller 4.

[0033] A paper tray 8 is provided between the first paper inlet 2 and the paper feed roller 4 and / or between the second paper inlet 3 and the paper feed roller 4. In this embodiment, the paper tray 8 is provided between the first paper inlet 2 and the paper feed roller 4, which can be used to directly feed paper rolls. The printer body 1 is detachably connected to a back plate on one side of the paper tray 8. By removing the back plate, the paper tray 8 can be exposed for paper roll replacement.

[0034] like Figures 6 to 8As shown, the back panel specifically includes two layers: a connecting plate 9 and a cover plate 10. The connecting plate 9 is fixed to the printer body 1 and can be fixed by clips or bolts and other fasteners. The cover plate 10 is detachably connected to the connecting plate 9. The connecting plate 9 has an opening 11 for exposing the paper tray 8, so that when the cover plate 10 is removed, only the paper tray 8 is exposed through the opening 11, and other internal components of the printer are not exposed, which improves operating efficiency and equipment structural stability.

[0035] The cover plate 10 completely covers the connecting plate 9. The connecting plate 9 has several positioning grooves 12, specifically four positioning grooves 12 at the four corners. The cover plate 10 has several positioning posts 13 protruding from the side facing the connecting plate 9, each corresponding to a positioning groove 12. The positioning posts 13 are used to insert into the positioning grooves 12. The inner wall of the positioning groove 12 has a stepped surface 14, and the side wall of the positioning post 13 has a hook 15. When the positioning post 13 is inserted into the positioning groove 12, the hook 15 engages with the stepped surface 14. The hook 15 is an elastic arm that can deform back and forth, allowing the user to directly lift the cover plate 10 using external force.

[0036] The printer body 1 contains a micro switch 16 for detecting whether the cover plate 10 is properly installed. The micro switch 16 is connected to the control board. A clearance hole 17 is provided on the connecting plate 9 corresponding to the position of the micro switch 16. The lever of the micro switch 16 is located at the clearance hole 17. A stop post 18 protrudes from the side of the cover plate 10 facing the connecting plate 9, and the position of the stop post 18 corresponds to the clearance hole 17. When the cover plate 10 is installed on the connecting plate 9, the stop post 18 passes into the clearance hole 17, pressing down the lever, thereby triggering the micro switch 16 and transmitting a signal to the control board to enable normal power-on.

[0037] A lifting notch 19 is provided on the side wall of the cover plate 10 to provide a leverage point for the user to lift the cover plate 10, making it easy to operate. Foot pads 20 are provided on the side of the cover plate 10 away from the connecting plate 9. The foot pads 20 are distributed at the four corners and can be made of hard plastic or rubber.

[0038] A panel 21 is provided on the side of the printer body 1 opposite to the back panel, i.e. the front side. The panel 21 is fixed to the printer body 1. A semi-transparent viewing window 22 is provided on the panel 21. The viewing window 22 is used to observe the working status of the inkjet cartridge 7, so that the user can directly observe the printing status of the inkjet cartridge 7 without disassembling the printer.

[0039] The paper feeding process of this utility model is as follows:

[0040] When using the paper tray 8 feeding method, open the cover plate 10, put the paper roll into the paper tray 8 through the opening 11, and turn on the paper feed roller 4 to suck in the paper roll to complete the paper feeding action.

[0041] When using external paper feeding, if the paper is manually pushed into the paper feed roller 4 from the first paper feed port 2, the first paper feed sensor 5 detects the paper, and the control board controls the drive assembly to drive the paper feed roller 4 to rotate forward, conveying the paper from the first paper feed port 2 to the second paper feed port 3; if the paper is manually pushed into the paper feed roller 4 from the second paper feed port 3, the second paper feed sensor 6 detects the paper, and the control board controls the drive assembly to drive the paper feed roller 4 to rotate in reverse, conveying the paper from the second paper feed port 3 to the first paper feed port 2; before printing begins, the paper feed roller 4 will retract the paper to the positioning edge, that is, align the initial printing position of the paper with the pre-approval position before starting printing.

[0042] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the design concept of the present utility model should be included within the protection scope of the present utility model.

[0043] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

Claims

1. A printer capable of feeding paper in both front and rear directions, characterized in that: The printer includes a printer body with a first paper inlet and a second paper inlet at opposite ends. The printer body contains a paper feed roller and is further equipped with a first paper feed sensor and a second paper feed sensor for detecting the paper feed direction. The first and second paper feed sensors are located between the first and second paper inlets, and the paper feed roller is located between the first and second paper feed sensors. The printer also includes a drive assembly for driving the paper feed roller to rotate, which controls the paper feed roller to rotate forward or backward according to the paper feed direction.

2. A printer capable of feeding paper in both front and rear directions according to claim 1, characterized in that: The printer body is equipped with an inkjet cartridge, and the paper feed roller and the inkjet cartridge are located between the first paper feed sensor and the second paper feed sensor.

3. A printer capable of feeding paper in both front and rear directions according to claim 1, characterized in that: A paper tray is provided between the first paper inlet and the paper feed roller and / or between the second paper inlet and the paper feed roller, and the printer body is detachably connected to a back plate on one side of the paper tray.

4. A printer capable of feeding paper in both front and rear directions according to claim 3, characterized in that: The back plate includes a connecting plate and a cover plate. The connecting plate is fixed to the printer body, and the cover plate is detachably connected to the connecting plate. The connecting plate has an opening for exposing the paper tray.

5. A printer capable of feeding paper in both front and rear directions according to claim 4, characterized in that: The connecting plate has several positioning slots, and the cover plate has several positioning posts protruding from one side of the connecting plate, which correspond one-to-one with the positioning slots. The inner sidewall of the positioning slot has a stepped surface, and the sidewall of the positioning post has a hook. When the positioning post is inserted into the positioning slot, the hook engages with the stepped surface.

6. A printer capable of feeding paper in both front and rear directions according to claim 5, characterized in that: The printer body is equipped with a micro switch for detecting whether the cover plate is installed in place. The connecting plate has a clearance hole corresponding to the position of the micro switch. The cover plate has an abutment post protruding from the side facing the connecting plate. When the cover plate is installed on the connecting plate, the abutment post passes into the clearance hole and triggers the micro switch.

7. A printer capable of feeding paper in both front and rear directions according to claim 5, characterized in that: The cover plate has a lifting notch on its side wall, and a foot pad is provided on the side of the cover plate away from the connecting plate.

8. A printer capable of feeding paper in both front and rear directions according to claim 1, characterized in that: The printer body has a panel on one side, and the panel has a semi-transparent viewing window for observing the working status of the inkjet cartridge.

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