Image printer based on medical images

Abstract

The invention provides an image printer based on medical images, and relates to the technical field of printers, the image printer comprises a printer body, a printing mechanism for printing is arranged in the printer body, a detection mechanism for detecting the printing mechanism is arranged in the printer body, the printing mechanism comprises a fixing frame, a printing nozzle, an ink storage box and an upper shell, the detection mechanism comprises a detection circuit board, a motor and an ink collection box, the upper shell is fixedly installed at the upper end of the printer body, and the fixing frame is fixedly installed on the inner side wall of the printer body. Through cooperation of the detection circuit board and the central control board, when the ink outlet nozzle in the printing nozzle is blocked, printing work can be interrupted in time, unnecessary waste of ink and paper is avoided, when the ink outlet nozzle is blocked, printed images are blurred, the medical image diagnosis accuracy is affected, and the medical image diagnosis efficiency is improved. The arrangement of the detection circuit board can timely discover blockage and shut down, and blurred images can be prevented from being generated.

Description

Technical Field

[0001] The present invention belongs to the technical field of printers, and more specifically, particularly relates to an image printer based on medical images. Background Art

[0002] Thermal inkjet printers for medical images are mainly used to print digital image data generated by medical imaging devices (such as CT, MRI, X-ray machines, etc.) into visual films or papers. When printing images, clear and accurate printed images can help doctors intuitively observe the patient's condition, such as the shape of organs, the location and size of lesions, etc., providing an important basis for the diagnosis of diseases.

[0003] Chinese Patent Publication No.: CN102862394A, a printer structure and a medical device. In this invention, when the cover is in an open state, the paper tray device raises the printing paper by a certain height, facilitating the insertion of fingers to take it out, and the printing paper can be taken out very conveniently with only one hand.

[0004] Existing medical printing devices have the following disadvantages when in use:

[0005] 1. In existing medical printing devices, due to temperature changes, long-term use, etc., the nozzles are prone to being blocked by ink stains and ink masses. When the nozzles of existing medical printing devices are blocked, the printer cannot be braked in time, resulting in abnormal situations such as missing lines and uneven colors in the printed images, affecting the accuracy of medical image diagnosis;

[0006] 2. In existing medical printing devices, when the nozzles are blocked, the printing work needs to be aborted during cleaning, and manual assistance is required to disassemble and clean the nozzles, resulting in low printing work efficiency and wasting the paper and ink for failed prints.

[0007] In view of this, research and improvement are carried out on the existing structure and deficiencies, and an image printer based on medical images is provided, with the expectation of achieving a more practical value. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides an image printer based on medical images to solve the above problems.

[0009] An image printer based on medical images, comprising a printing body. A printing mechanism for printing is provided inside the printer body, and a detection mechanism for detecting the printing mechanism is provided inside the printer body. The printing mechanism includes a fixing frame, a printing nozzle, an ink storage tank, and an upper housing. The detection mechanism includes a detection circuit board, a motor, and an ink collection box. The upper housing is fixedly installed at the upper end of the printing body, the fixing frame is fixedly installed on the inner side wall of the printing body, the printing nozzle is located at the upper end of the fixing frame, the number of ink storage tanks is multiple, and each ink storage tank is fixedly installed on the inner side wall of the printing body. The motor is fixedly installed at the side end of the fixing frame, the ink collection box is located at the lower end of the fixing frame. An outlet for paper is provided at the side end of the printing body, a paper transmission mechanism is provided on the inner side wall of the printing body, a transmission mechanism is fixedly installed at the upper end of the fixing frame, a movable block is fixedly installed at the side end of the printing nozzle, and the printing nozzle is fixedly installed at the side end of the transmission mechanism through the movable block. A detection circuit board is fixedly installed at the upper end of the printing nozzle. A plurality of ink guide cavities are formed on the inner side wall of the printing nozzle. A plurality of ink outlet nozzles are formed below each ink guide cavity. A plurality of installation grooves are provided on the inner side wall of each ink guide cavity, and the positions of each installation groove correspond to those of the ink outlet nozzles. A high-sensitivity resistor is fixedly installed on the inner side wall of each installation groove, and each high-sensitivity resistor is electrically connected to the detection circuit board. An ink guide tube is fixedly installed between the printing nozzle and each ink storage tank. A lead screw is fixedly installed at the output end of the motor. Two slide rails are provided below the fixing frame. L-shaped slide rods are fixedly installed at both side ends of the ink collection box, and the two L-shaped slide rods are respectively slidably installed on the inner side walls of the slide rails. A fixing plate is fixedly installed at the upper end of the ink collection box, and a thread groove is formed through the side end of the fixing plate.

[0010] Preferably, the lead screw is threadedly rotatably installed on the inner side wall of the thread groove.

[0011] Preferably, a paper inlet is provided on the upper housing, and a central control board is fixedly installed at the side end of the upper housing.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, by providing a detection circuit board, a printing nozzle, and a high-sensitivity resistor in cooperation, when the ink outlet nozzles on the printing nozzle are blocked, the detection circuit board can detect the temperature of each high-sensitivity resistor in real time. Once the ink outlet nozzle is blocked and the temperature is abnormal, the detection circuit board can quickly detect and send a signal. Compared with manual regular inspection or finding problems only when obvious defects are printed, real-time detection can detect blockages earlier, the detection reaction is timely, and the disadvantages of manual detection delay are avoided.

[0014] In the present invention, by providing a detection circuit board and a central control board in cooperation, when the ink outlet nozzle in the print head becomes blocked, the printing operation can be interrupted in a timely manner, avoiding unnecessary waste of ink and paper. Moreover, when the ink outlet nozzle becomes blocked, it will cause the printed image to be blurred, affecting the accuracy of medical image diagnosis. The setting of the detection circuit board can detect the blockage in a timely manner and stop the machine, preventing the generation of blurred images and ensuring the printing quality, providing clear and accurate image data for doctors.

[0015] In the present invention, by providing an upper housing, a print head and a high-sensitivity resistor in cooperation, when the detection circuit board detects that the ink outlet nozzle is blocked, a specific pulsed heating signal can be applied to the corresponding high-sensitivity resistor through the upper housing, thereby achieving the dredging of the ink outlet nozzle. Furthermore, during printing, the ink outlet nozzle can be automatically dredged, and only a pulsed heating signal is applied to the corresponding high-sensitivity resistor. While achieving the dredging of the blocked ink outlet nozzle, the power loss during dredging is reduced, and manual intervention for cleaning is not required, improving the efficiency of dredging and cleaning.

[0016] In the present invention, by providing an ink collection box, when dredging the ink outlet nozzle on the print head, the ink collection box in the printer body will move below the print head, and the dredged ink stains and ink masses will drip into the ink collection box, avoiding direct contamination of the paper being printed or waiting to be printed, preventing ink stains and spots from appearing on the paper, which would cause the printed image to be blurred and the color to be uneven, and at the same time avoiding waste of paper.

[0017] In the present invention, by providing a central control board, a detection circuit board and a motor in cooperation, after the ink outlet nozzle is dredged, when the detection circuit board detects that the temperature of the high-sensitivity resistor is normal, it can drive the components in the printer body to move back to their original positions, and then continue the printing operation, realizing automatic shutdown, automatic dredging, and automatic reset and continuation of printing after blockage, avoiding situations such as printing ink leakage and blurring, ensuring the progress of the printing operation without manual intervention, and ensuring the processing efficiency during blockage while guaranteeing the printing clarity. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of the printing body of the present invention;

[0019] Figure 2 is an exploded schematic structural diagram of the upper housing of the present invention;

[0020] Figure 3 is an exploded schematic structural diagram of the printing body of the present invention;

[0021] Figure 4 is a schematic structural diagram of the paper feeding mechanism of the present invention;

[0022] Figure 5 is a schematic structural diagram of the print head of the present invention;

[0023] Figure 6 is an exploded schematic view of the ink storage box of the present invention;

[0024] Figure 7 is an exploded schematic view of the ink collection box of the present invention;

[0025] Figure 8 is a schematic cross-sectional structure view of the print head of the present invention.

[0026] In the figure, the corresponding relationship between the component names and the drawing reference numbers is as follows: 1, printing body; 11, paper outlet; 12, paper feeding mechanism; 2, fixing frame; 21, transmission mechanism; 3, print head; 31, movable block; 32, detection circuit board; 33, high-sensitivity resistor; 34, installation groove; 35, ink guiding cavity; 36, ink outlet nozzle; 4, ink storage box; 41, ink guiding tube; 5, motor; 51, lead screw; 6, ink collection box; 61, L-shaped sliding rod; 62, fixing plate; 63, thread groove; 7, upper shell; 71, paper inlet; 72, central control board. Detailed implementation manners

[0027] The following further describes in detail the implementation manners of the present invention with reference to the drawings and embodiments. The following embodiments are used to illustrate the present invention, but cannot be used to limit the scope of the present invention.

[0028] Please refer to Figures 1-8 , the present invention provides an image printer based on medical images, including a printing body 1. A printing mechanism for printing is provided inside the printing body 1, and a detection mechanism for detecting the printing mechanism is provided inside the printing body 1. The printing mechanism includes a fixing frame 2, a print head 3, an ink storage box 4, and an upper shell 7. The detection mechanism includes a detection circuit board 32, a motor 5, and an ink collection box 6. In medical work, it is necessary to print the digital image data generated by medical imaging devices (such as CT, MRI, X-ray machines, etc.) into visual films or papers. A digital network interface is integrated on the printing body 1. When performing image printing, the paper is placed in the paper inlet 71, and the digital image data collected by the medical imaging device is transmitted to the printing body 1 through the network interface. By operating the central control board 72, the components inside the printing body 1 are driven to perform inkjet printing. When performing image printing, the paper will be driven by the paper feeding mechanism 12. The paper feeding mechanism 12 is integrated with structures such as a transmission belt, a transmission roller, a sensor, a positioning roller, and a paper outlet roller. The paper feeding mechanism 12 drives the paper to move inside the printing body 1. When printing and jetting ink, the print head 3 is driven to reciprocate by the transmission mechanism 21. The high-sensitivity resistor 33 inside the print head 3 will heat up, causing the ink in the ink guiding cavity 35 to form steam bubbles. The steam bubbles expand to generate pressure, squeezing the ink out of the ink outlet nozzle 36 and spraying it onto the paper, thereby realizing printing;

[0029] The upper housing 7 is fixedly installed at the upper end of the printer body 1, the fixing frame 2 is fixedly installed on the inner side wall of the printer body 1, the print head 3 is located at the upper end of the fixing frame 2, the number of ink storage tanks 4 is multiple, and each ink storage tank 4 is fixedly installed on the inner side wall of the printer body 1. The motor 5 is fixedly installed at the side end of the fixing frame 2, the ink collecting box 6 is located at the lower end of the fixing frame 2, a paper outlet 11 is provided at the side end of the printer body 1, a paper feeding mechanism 12 is provided on the inner side wall of the printer body 1, a transmission mechanism 21 is fixedly installed at the upper end of the fixing frame 2, a movable block 31 is fixedly installed at the side end of the print head 3, and the print head 3 is fixedly installed at the side end of the transmission mechanism 21 through the movable block 31. A detection circuit board 32 is fixedly installed at the upper end of the print head 3. A plurality of ink guide cavities 35 are formed in the inner side wall of the print head 3. A plurality of ink outlet nozzles 36 are formed below each ink guide cavity 35. A plurality of mounting grooves 34 are provided on the inner side wall of each ink guide cavity 35. The positions of each mounting groove 34 correspond to those of the ink outlet nozzles 36. A high-sensitivity resistor 33 is fixedly installed on the inner side wall of each mounting groove 34. Each high-sensitivity resistor 33 is electrically connected to the detection circuit board 32. During long-term printing of the print head 3, the ink outlet nozzles 36 on the print head 3 may become clogged. During normal operation, the jet flow of ink will carry away some heat, and the high-sensitivity resistor 33 can maintain a relatively stable operating temperature. When the ink outlet nozzles 36 are clogged, the ink cannot flow normally, the heat dissipation is blocked, and the temperature of the high-sensitivity resistor 33 will rise. A detection circuit board 32 is provided on the print head 3. The detection circuit board 32 can detect the temperature of each high-sensitivity resistor 33 in the print head 3 in real time. When the detection circuit board 32 detects that the temperature of a high-sensitivity resistor 33 is abnormally high, it will transmit a signal to the central control board 72, and the central control board 72 will drive devices such as the transmission mechanism 21 and the paper feeding mechanism 12 to stop working, that is, interrupt the printing operation;

[0030] A guide ink tube 41 is fixedly installed between the printing nozzle 3 and each ink storage tank 4. The output end of the motor 5 is fixedly installed with a lead screw 51. There are two slide rails below the fixing frame 2. Both end parts of the side of the ink collecting box 6 are fixedly installed with L-shaped slide bars 61. The two L-shaped slide bars 61 are respectively slidably installed on the inner side walls of the slide rails. The upper end part of the ink collecting box 6 is fixedly installed with a fixing plate 62. A thread groove 63 is penetrated and opened at the side end part of the fixing plate 62. The lead screw 51 is threadedly rotated and installed on the inner side wall of the thread groove 63. When the detection circuit board 32 detects that the high-sensitivity resistor 33 has a high temperature and the ink nozzle 36 is blocked, after driving the components in the printing body 1 to stop, at this time, the upper shell 7 will drive the motor 5 to operate. The motor 5 starts to drive the lead screw 51 to rotate. The rotation of the lead screw 51 drives the fixing plate 62 to move through the thread groove 63. The movement of the fixing plate 62 drives the ink collecting box 6 to slide. The ink collecting box 6 will slide and move to the lower part of the printing nozzle 3. At this time, the ink collecting box 6 will block the paper. Because the detection circuit board 32 can detect the temperature of each high-sensitivity resistor 33, when the temperature of a certain high-sensitivity resistor 33 abnormally rises, that is, the corresponding ink nozzle 36 is blocked. When the ink collecting box 6 moves to the lower part of the printing nozzle 3, the upper shell 7 will apply a specific pulse heating signal to make the high-sensitivity resistor 33 generate a periodic temperature change. Using the principle of thermal expansion and contraction of ink, the blockage is loosened. At this time, the blocked ink stain or ink mass will fall on the ink collecting box 6, so as to realize the dredging of the ink nozzle 36;

[0031] The upper shell 7 is provided with a paper inlet 71. The side end part of the upper shell 7 is fixedly installed with a central control board 72. After the dredging of the ink nozzle 36 is completed, when the upper shell 7 drives the high-sensitivity resistor 33 to heat, the temperature of the high-sensitivity resistor 33 will be stabilized within a threshold value to make the ink droplets drip. At this time, the detection circuit board 32 will detect that the temperature of the high-sensitivity resistor 33 is normal. At this time, the central control board 72 will drive the motor 5 to drive the ink collecting box 6 to reset. After detecting that the ink collecting box 6 is reset and the dredging of the ink nozzle 36 is completed, the upper shell 7 will start the paper feeding mechanism 12 and the transmission mechanism 21 again to continue the printing work.

[0032] Working principle:

[0033] The first step is that in medical work, it is necessary to print the digital image data generated by medical imaging equipment (such as CT, MRI, X-ray machine, etc.) into a visualized film or paper. The printer body 1 is integrated with a digital network interface. When printing an image, the paper is placed in the paper inlet 71, and the medical imaging equipment transmits the collected digital image data to the printer body 1 through the network interface. By controlling the central control board 72, the components inside the printer body 1 are driven to perform inkjet printing. When printing an image, the paper will be driven by the paper feeding mechanism 12. The paper feeding mechanism 12 is integrated with a transmission belt, a transmission roller, a sensor, a positioning roller, a paper output roller and other structures. The paper feeding mechanism 12 drives the paper to move in the printer body 1. When printing inkjet, the transmission mechanism 21 drives the print head 3 to move back and forth. The high-sensitive resistor 33 in the print head 3 will be heated, so that the ink in the ink guide cavity 35 forms a steam bubble. The steam bubble expands to generate pressure, and the ink is squeezed out from the ink output nozzle 36 and sprayed onto the paper, thereby achieving printing.

[0034] In the second step, when the print head 3 is printing for a long time, the ink nozzle 36 on the print head 3 is clogged. When working normally, the ink jet flow will take away some heat, and the high-sensitive resistor 33 can maintain a relatively stable working temperature. When the ink nozzle 36 is clogged, the ink cannot flow normally, the heat loss is blocked, and the temperature of the high-sensitive resistor 33 will rise. A detection circuit board 32 is set on the print head 3. The detection circuit board 32 can detect the temperature of each high-sensitive resistor 33 in the print head 3 in real time. When the detection circuit board 32 detects that the temperature of the high-sensitive resistor 33 is abnormally high, it will transmit a signal to the central control board 72, and the central control board 72 will drive the transmission mechanism 21, the paper feeding mechanism 12 and other equipment to stop working, that is, the printing work is interrupted;

[0035] The device is provided with a detection circuit board 32, a print head 3 and a high-sensitive resistor 33. When the ink nozzle 36 on the print head 3 is clogged, the temperature of each high-sensitive resistor 33 can be detected in real time through the detection circuit board 32. Once the ink nozzle 36 is clogged and causes abnormal temperature, the detection circuit board 32 can quickly detect and send a signal. Compared with manual regular inspection or finding problems only after obvious defects are printed, real-time detection can find blockages earlier, and the detection response is timely, avoiding the disadvantages of manual detection delays.

[0036] The device is provided with a detection circuit board 32 and a central control board 72 to cooperate with each other. When the ink nozzle 36 in the print nozzle 3 is clogged, the printing work can be interrupted in time to avoid unnecessary waste of ink and paper. When the ink nozzle 36 is clogged, the printed image will be blurred, affecting the accuracy of medical image diagnosis. The setting of the detection circuit board 32 can detect the blockage and stop the machine in time, which can prevent the generation of blurred images, ensure the printing quality, and provide doctors with clear and accurate image data.

[0037] In the third step, when the detection circuit board 32 detects that the high-sensitivity resistor 33 has an abnormal high temperature and the ink jet head 36 is blocked, after driving the components in the printing body 1 to stop, at this time, the upper housing 7 will drive the motor 5 to operate. The motor 5 starts to drive the lead screw 51 to rotate. The rotation of the lead screw 51 drives the fixed plate 62 to move through the thread groove 63. The movement of the fixed plate 62 drives the ink collection box 6 to slide. The ink collection box 6 will slide and move to the lower part of the printing head 3. At this time, the ink collection box 6 will block the paper. Since the detection circuit board 32 can detect the temperature of each high-sensitivity resistor 33, when the temperature of a certain high-sensitivity resistor 33 abnormally rises, that is, the corresponding ink jet head 36 is blocked. When the ink collection box 6 moves to the lower part of the printing head 3, the upper housing 7 will apply a specific pulsed heating signal to make the high-sensitivity resistor 33 generate a periodic temperature change. Using the principle of thermal expansion and contraction of the ink, the blockage is loosened. At this time, the blocked ink stain or ink mass will fall on the ink collection box 6, so as to realize the dredging of the ink jet head 36;

[0038] By setting the upper housing 7, the printing head 3 and the high-sensitivity resistor 33 to cooperate with each other, when the detection circuit board 32 detects that the ink jet head 36 is blocked, the upper housing 7 can apply a specific pulsed heating signal to the corresponding high-sensitivity resistor 33, so as to realize the dredging of the ink jet head 36. Furthermore, when printing, the ink jet head 36 can be automatically dredged, and only a pulsed heating signal is applied to the corresponding high-sensitivity resistor 33. While realizing the dredging of the blocked ink jet head 36, the power consumption during dredging is reduced, and manual intervention for cleaning is not required, improving the efficiency of dredging and cleaning;

[0039] By setting the ink collection box 6 in this device, when dredging the ink jet head 36 on the printing head 3, the ink collection box 6 in the printing body 1 will move to the lower part of the printing head 3, and the dredged ink stains and ink masses will drip into the ink collection box 6, avoiding directly contaminating the paper being printed or waiting to be printed, avoiding ink stains and spots on the paper, making the printed image blurred and the color uneven, and at the same time avoiding waste of paper;

[0040] In the fourth step, after the dredging of the ink jet head 36 is completed, when the upper housing 7 drives the high-sensitivity resistor 33 to heat, the temperature of the high-sensitivity resistor 33 will stabilize within a threshold value to make the ink droplets drip. At this time, the detection circuit board 32 will detect that the temperature of the high-sensitivity resistor 33 is normal. At this time, the central control board 72 will drive the motor 5 to drive the ink collection box 6 to reset. After detecting that the ink collection box 6 has reset and the dredging of the ink jet head 36 is completed, the upper housing 7 will start the paper feeding mechanism 12 and the transmission mechanism 21 again to continue the printing work;

[0041] This device is configured with a central control board 72, a detection circuit board 32, and a motor 5 cooperating with each other. After the ink ejection nozzle 36 is unclogged, the detection circuit board 32 can detect that the temperature of the high-sensitivity resistor 33 is normal, and then drive the components in the printer body 1 to move back to their original positions, and then continue the printing work, realizing automatic shutdown, automatic unclogging, and automatic reset and continuation of printing work after clogging, avoiding situations such as printing ink leakage and blurring, ensuring the progress of printing work, without manual intervention, and ensuring the printing clarity while ensuring the processing efficiency during clogging.

[0042] The embodiments of the present invention are given for purposes of illustration and description, and are not exhaustive or limit the invention to the disclosed form. Many modifications and variations are obvious to those of ordinary skill in the art. The embodiments are selected and described to better illustrate the principles and practical applications of the present invention, and to enable those of ordinary skill in the art to understand the present invention and thus design various embodiments suitable for specific purposes with various modifications.

Claims

1. An image printer based on medical imaging, comprising a printer body (1), characterized in that: The printer body (1) is provided with a printing mechanism for printing, and the printer body (1) is provided with a detection mechanism for detecting the printing mechanism; The printing mechanism comprises a fixing frame (2), a print head (3), an ink storage box (4) and an upper shell (7); the detection mechanism comprises a detection circuit board (32), a motor (5) and an ink collection box (6); the upper shell (7) is fixedly mounted on the upper end of the printer body (1); the fixing frame (2) is fixedly mounted on the inner side wall of the printer body (1); the print head (3) is located at the upper end of the fixing frame (2); there are a plurality of ink storage boxes (4), each of which is fixedly mounted on the inner side wall of the printer body (1); the motor (5) is fixedly mounted on the side end of the fixing frame (2); and the ink collection box (6) is located at the lower end of the fixing frame (2).

2. The image printer based on medical imaging as claimed in claim 1, characterized in that: A paper outlet (11) is provided at the side end of the printer body (1), and a paper conveying mechanism (12) is provided on the inner side wall of the printer body (1).

3. The image printer based on medical imaging as claimed in claim 2, characterized in that: A transmission mechanism (21) is fixedly mounted on the upper end of the fixed frame (2), a movable block (31) is fixedly mounted on the side end of the print head (3), and the print head (3) is fixedly mounted on the side end of the transmission mechanism (21) via the movable block (31).

4. The image printer based on medical imaging as claimed in claim 3, characterized in that: A detection circuit board (32) is fixedly mounted on the upper end of the print head (3), a plurality of ink guide cavities (35) are provided on the inner side wall of the print head (3), and a plurality of ink outlet nozzles (36) are provided below each of the ink guide cavities (35).

5. The image printer based on medical imaging as claimed in claim 4, characterized in that: The inner side wall of each ink guide cavity (35) is provided with a plurality of mounting grooves (34), each mounting groove (34) corresponds to the position of an ink outlet nozzle (36), and a high-sensitive resistor (33) is fixedly mounted on the inner side wall of each mounting groove (34).

6. The image printer based on medical imaging as claimed in claim 5, characterized in that: Each of the high-sensitive resistors (33) is electrically connected to the detection circuit board (32), and an ink guide tube (41) is fixedly installed between the print head (3) and each ink storage box (4).

7. An image printer based on medical imaging as claimed in claim 6, characterized in that: A screw rod (51) is fixedly mounted on the output end of the motor (5), two slide rails are arranged below the fixed frame (2), and L-shaped slide bars (61) are fixedly mounted on both side ends of the ink collecting box (6), and the two L-shaped slide bars (61) are respectively slidably mounted on the inner side walls of the slide rails.

8. An image printer based on medical imaging as claimed in claim 7, characterized in that: A fixing plate (62) is fixedly mounted on the upper end of the ink collecting box (6), and a wire groove (63) is penetrated through the side end of the fixing plate (62).

9. An image printer based on medical imaging as claimed in claim 8, characterized in that: The screw rod (51) is threadably mounted on the inner side wall of the screw groove (63).

10. An image printer based on medical imaging as claimed in claim 9, characterized in that: The upper shell (7) is provided with a paper feed port (71), and a central control panel (72) is fixedly mounted on the side end of the upper shell (7).

Images