Paper feeding support mechanism for printer carbon paper

Abstract

The utility model discloses a paper feeding support mechanism for printer carbon paper, which comprises a rack and a longitudinal beam fixed on one side in the rack, an inclined wall type paper feeding table used for supporting the carbon paper is mounted at the top end of the longitudinal beam, and a paper feeding roller is rotatably mounted in the rack at the tail end of the slope surface of the inclined wall type paper feeding table. A swing arm is hinged to the portion, above the paper feeding roller, in the machine frame, a pressing roller is rotationally installed on the outer wall of one side of the swing arm, and electric swing pushing mechanisms used for pulling the swing arm to swing downwards are arranged on the two inner walls of the machine frame. According to the utility model, carbon paper can be stably supported when entering the space between the compression roller and the paper feeding roller through the inclined wall type paper feeding table, the layering phenomenon caused by vibration and friction is avoided, and the carbon paper can be kept flat in the printing process through the cooperative use of the electric swinging and pushing mechanism and the compression roller, so that the printing quality is improved. Therefore, the printed file is clear in handwriting and uniform in color.

Description

Technical Field

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

[0002] The carbon paper feeding mechanism is a key component in the printer that is responsible for accurately and evenly delivering the carbon paper to the printing position. Its main structure includes a carbon paper holder, a paper feed roller, a drive device, a paper guide, a tension control device, and a protective device. The carbon paper holder is used to support the carbon paper to ensure that it is placed stably; the paper feed roller uses friction to deliver the carbon paper to the printing area, and is usually made of soft material to reduce damage to the carbon paper; the drive device is responsible for driving the paper feed roller to rotate, and its speed and torque must match those of the paper feed roller; the paper guide ensures that the carbon paper moves along the correct path during the feeding process; the tension control device adjusts the tension of the carbon paper to avoid wrinkles or breaks; and the protective device protects the paper feed mechanism from damage. These components work together to ensure that the carbon paper maintains the correct position and tension during the printing process. However, during use, the current paper feeding mechanism is prone to stratification due to movement and vibration when horizontally transported, as carbon paper has a multi-layer structure. The stratified carbon paper will cause the printed documents to have problems such as unclear handwriting and uneven color. Especially when printing multiple copies of a document, the stratification phenomenon will be more obvious, seriously affecting the print quality or even causing printing failure. Utility Model Content

[0003] The purpose of the utility model is to provide a paper feeding support mechanism for carbon paper of a printer, which utilizes an inclined wall type paper feeding table to connect the carbon paper to be printed, and the carbon paper enters between a pressure roller and a paper feeding roller, and an electric swing pushing mechanism causes the pressure roller to press the carbon paper, so that a pulley driving unit drives the paper feeding roller to stably transfer the carbon paper, and finally the belt paper feeding structure delivers the carbon paper to the printing mechanism, so as to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a paper feeding support mechanism for printer carbon paper, comprising a frame and a longitudinal beam fixed on one side of the frame, and a slanted wall type paper feeding table for supporting carbon paper is installed on the top of the longitudinal beam, a paper feeding roller is rotatably installed inside the frame at the end of the slope of the slanted wall type paper feeding table, a swing arm is hinged inside the frame above the paper feeding roller, and a pressure roller is rotatably installed on the outer wall of one side of the swing arm, an electric swing pushing mechanism for pulling the swing arm to swing down is arranged on both inner walls of the frame, a supporting arm is installed on one side of the top of the frame, and a belt paper feeding structure is installed on the top of the supporting arm, and a pulley driving unit for driving the paper feeding roller to rotate is installed on the inner wall of one side of the frame.

[0005] Preferably, the included angle between the slope paper feeding direction at the top of the inclined wall type paper feeding table and the horizontal paper feeding direction of the belt paper feeding structure is 140 - 170°.

[0006] Preferably, the electric swing - push mechanism includes an electric push rod hingedly installed on the inner wall of one side of the frame and a rotating shaft rotatably installed inside the frame above the electric push rod. The top end of the piston rod of the electric push rod is hinged to the outer wall of one side of the swing arm through a ball eye joint, and the swing arm is installed on the rotating shaft.

[0007] Preferably, the pressure roller is made of rubber material.

[0008] Preferably, the belt drive unit includes a stepping motor installed on the inner wall of one side of the frame and a belt drive structure one installed at the output end of the stepping motor for driving the paper feeding roller to rotate. The belt drive unit further includes a belt drive structure two installed at the other end of the paper feeding roller. The paper feeding roller and the belt paper feeding structure are in power connection through the belt drive structure two.

[0009] Preferably, the belt drive structure two includes a driving track wheel installed at the other end of the paper feeding roller and a driven track wheel installed at the input end of the support arm. A multi - wedge belt is wound between the driving track wheel and the driven track wheel.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows: The paper feeding support mechanism for the printer carbon paper can stably support the carbon paper when it enters between the pressure roller and the paper feeding roller through the inclined wall type paper feeding table, avoiding the delamination phenomenon caused by vibration and friction. Moreover, the combined use of the electric swing - push mechanism and the pressure roller can keep the carbon paper flat during the printing process, thereby ensuring that the printed document has clear handwriting and uniform color, and improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 is the front - view structural schematic diagram of the present utility model;

[0012] Figure 2 is the side - view structural schematic diagram of the present utility model;

[0013] Figure 3 is the three - dimensional structural schematic Figure 1 ;

[0014] Figure 4 is the three - dimensional structural schematic Figure 2 ;

[0015] Figure 5 is the three - dimensional structural schematic Figure 3 。

[0016] In the figure: 1, frame; 2, longitudinal beam; 3, inclined wall type paper feeding table; 4, swing arm; 5, electric swing and push mechanism; 501, electric push rod; 502, rotating shaft; 6, pressure roller; 7, paper feeding roller; 8, supporting arm; 9, belt paper feeding structure; 10, belt transmission structure II; 11, belt pulley driving unit. Detailed implementation mode

[0017] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0018] Please refer to Figures 1-5 , an embodiment provided by the present invention: a paper feeding support mechanism for a printer carbon paper, including a frame 1 and a longitudinal beam 2 fixed on one side inside the frame 1, and an inclined wall type paper feeding table 3 for supporting the carbon paper is installed at the top end of the longitudinal beam 2. A paper feeding roller 7 is rotatably installed inside the frame 1 at the end of the slope of the inclined wall type paper feeding table 3. A swing arm 4 is hinged inside the frame 1 above the paper feeding roller 7, and a pressure roller 6 is rotatably installed on the outer wall of one side of the swing arm 4. Electric swing and push mechanisms 5 for pulling the swing arm 4 to swing downward are arranged on both inner walls of the frame 1. A supporting arm 8 is installed on one side of the top end of the frame 1, and a belt paper feeding structure 9 is installed at the top end of the supporting arm 8. A belt pulley driving unit 11 for driving the paper feeding roller 7 to rotate is installed on the inner wall of one side of the frame 1;

[0019] The included angle between the slope paper feeding direction at the top end of the inclined wall type paper feeding table 3 and the horizontal paper feeding direction of the belt paper feeding structure 9 is 140 - 170°. The upper surface of the inclined wall type paper feeding table 3 forms a certain slope so that the carbon paper can slide naturally along the slope;

[0020] The electric swing and push mechanism 5 includes an electric push rod 501 hinged and installed on the inner wall of one side of the frame 1 and a rotating shaft 502 rotatably installed inside the frame 1 above the electric push rod 501. The top end of the piston rod of the electric push rod 501 is hinged to the outer wall of one side of the swing arm 4 through a ball eye joint. The swing arm 4 is installed on the rotating shaft 502. When the piston rod of the electric push rod 501 contracts, the electric push rod 501 pulls the swing arm 4 and the pressure roller 6 to swing downward until the carbon paper is clamped by the pressure roller 6 and the paper feeding roller 7. During this process, the rotating shaft 502 serves as the circumferential axis of the pressure roller 6 and the swing arm 4;

[0021] The pressure roller 6 is made of rubber material. Since the pressure roller 6 is made of soft rubber material, it can reduce the damage to the carbon paper and make there be a frictional force between the carbon paper and the pressure roller 6 and the paper feeding roller 7 to ensure that the carbon paper can move stably;

[0022] Anti-slip textures can also be provided on the outer surfaces of the pressure roller 6 and the paper feed roller 7 to increase the friction between themselves and the carbon paper, enabling the carbon paper to move more stably;

[0023] The pulley drive unit 11 includes a stepper motor installed on the inner wall of one side of the frame 1 and a belt drive structure one installed at the output end of the stepper motor for driving the paper feed roller 7 to rotate. The pulley drive unit 11 further includes a belt drive structure two 10 installed at the other end of the paper feed roller 7. The paper feed roller 7 and the belt paper feed structure 9 are kept in power connection through the belt drive structure two 10. The belt drive structure two 10 includes a driving caterpillar wheel installed at the other end of the paper feed roller 7 and a driven caterpillar wheel installed at the input end of the support arm 8. A multi-wedge belt is wound between the driving caterpillar wheel and the driven caterpillar wheel;

[0024] The rotational power of the pulley drive unit 11 is first transmitted to the paper feed roller 7, and the carbon paper is moved by the paper feed roller 7. During this process, the paper feed roller 7 is kept in power connection with the belt paper feed structure 9 through the belt drive structure two 10, so that the paper feed roller 7 and the belt paper feed structure 9 rotate in the same direction and jointly move the carbon paper, avoiding the unstable paper feed speed caused by the stratification of the carbon paper and enabling the carbon paper to move stably and enter the printing mechanism.

[0025] When the embodiment of the present application is in use, first, the carbon paper to be printed is located on the inclined wall type paper feed table 3. The upper surface of the inclined wall type paper feed table 3 forms a certain slope so that the carbon paper can slide naturally along the inclined plane and finally enter between the pressure roller 6 and the paper feed roller 7. When the carbon paper enters the inclined wall type paper feed table 3 of this mechanism and is located between the pressure roller 6 and the paper feed roller 7, the control unit of the printer controls the electric swing push mechanism 5 and the pulley drive unit 11 to act. The electric swing push mechanism 5 pulls the swing arm 4 and the paper feed roller 7 to swing downward so that the carbon paper is clamped by the pressure roller 6 and the paper feed roller 7. The main function of this step is to firmly press the carbon paper on the paper feed roller 7 to prevent the carbon paper from stratifying due to vibration or friction during the transfer process. The pulley drive unit 11 drives the paper feed roller 7 to rotate actively, thereby pushing the carbon paper forward until the carbon paper in the compacted state is sent to the belt paper feed structure 9, ensuring that the carbon paper can move evenly until it is sent to the printing mechanism of the printer. The inclined wall type paper feed table 3 in this mechanism can stably support the carbon paper when it enters between the pressure roller 6 and the paper feed roller 7, avoiding the stratification phenomenon caused by vibration and friction. The combined use of the electric swing push mechanism 5 and the pressure roller 6 can keep the carbon paper flat during the printing process, thereby ensuring that the printed document has clear handwriting and uniform color and improving the printing quality.

[0026] For those skilled in the art, it is obvious that the present utility model is not limited to the details of the above-mentioned exemplary embodiments, and the present utility model can be implemented in other specific forms without departing from the spirit or basic characteristics of the present utility model. Therefore, from any point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present utility model is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the equivalent elements of the claims are intended to be embraced within the present utility model. Any reference signs in the claims should not be construed as limiting the claims involved.

Claims

1. A paper feeding support mechanism for a printer carbon paper, characterized in that: It includes a frame (1) and a longitudinal beam (2) fixed to one side inside the frame (1), and an inclined-wall paper feeding table (3) for supporting carbon paper is installed at the top end of the longitudinal beam (2). A paper feeding roller (7) is rotatably installed inside the frame (1) at the end of the slope of the inclined-wall paper feeding table (3). An oscillating arm (4) is hinged inside the frame (1) above the paper feeding roller (7), and a pressure roller (6) is rotatably installed on the outer wall of one side of the oscillating arm (4). Electric oscillating push mechanisms (5) for pulling the oscillating arm (4) to swing downward are arranged on both inner walls of the frame (1). A support arm (8) is installed on one side of the top end of the frame (1), and a belt paper feeding structure (9) is installed at the top end of the support arm (8). A pulley drive unit (11) for driving the paper feeding roller (7) to rotate is installed on the inner wall of one side of the frame (1).

2. The paper feeding support mechanism of a printer carbon paper according to claim 1, characterized in that: The included angle between the slope paper feeding direction at the top end of the inclined-wall paper feeding table (3) and the horizontal paper feeding direction of the belt paper feeding structure (9) is 140 - 170°.

3. The paper feeding support mechanism for a printer carbon paper according to claim 1, characterized in that: The electric oscillating push mechanism (5) includes an electric push rod (501) hinged to the inner wall of one side of the frame (1) and a rotating shaft (502) rotatably installed inside the frame (1) above the electric push rod (501). The top end of the piston rod of the electric push rod (501) is hinged to the outer wall of one side of the oscillating arm (4) through a spherical eye joint, and the oscillating arm (4) is installed on the rotating shaft (502).

4. The paper feeding support mechanism of a printer carbon paper according to claim 1, characterized in that: The pressure roller (6) is made of rubber material.

5. The paper feeding support mechanism of a printer carbon paper according to claim 1, characterized in that: The pulley drive unit (11) includes a stepping motor installed on the inner wall of one side of the frame (1) and a first belt drive structure for driving the paper feeding roller (7) to rotate installed at the output end of the stepping motor. The pulley drive unit (11) also includes a second belt drive structure (10) installed at the other end of the paper feeding roller (7). The paper feeding roller (7) and the belt paper feeding structure (9) are kept in power connection through the second belt drive structure (10).

6. The paper feeding support mechanism for a printer carbon paper according to claim 5, characterized in that: The second belt drive structure (10) includes a driving track wheel installed at the other end of the paper feeding roller (7) and a driven track wheel installed at the input end of the support arm (8). A multi-wedge belt is wound between the driving track wheel and the driven track wheel.

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