Improved printer

Abstract

The utility model relates to a modified printer, which belongs to the field of printing equipment and is characterized in that a printing area is arranged on a printing platform, and a movable printing assembly carries a printing nozzle to move in the printing area; the paper sensor is used for obtaining a paper sensing signal; and the adsorption assembly adsorbs the paper wood from bottom to top, and clamping in the printing process is achieved. And the paper pressing assemblies are symmetrically arranged on the two sides of the paper feeding assembly correspondingly and used for pressing paper on the paper feeding assembly, the distance between each paper pressing assembly and the paper feeding assembly can be adjusted, and the clamping stability in the paper feeding process is guaranteed. And the control assembly is arranged in the outer shell, is connected with the paper sensor, and is used for controlling the paper sensor to enable the paper sensor to output a paper sensing signal and respectively controlling the adsorption assembly and the printing platform according to the paper sensing signal, so that the recognition reliability of the transparent paper is improved.

Description

Technical Field

[0001] The utility model belongs to the field of printing equipment, and particularly relates to a modified printer. Background Art

[0002] With the development of society, the demand for printing on transparent paper materials has increased. Existing small office or home printing equipment is difficult to meet the usage requirements, while large commercial equipment has a relatively high cost. Taking a common small office printer as an example, the main difficulties are as follows: Materials such as slides and DTF films have insufficient ink absorption performance, and the contact during clamping will damage the printed pattern; moreover, the friction and stiffness of such transparent paper materials are insufficient, and they are prone to deformation or fluttering during the paper feeding process or printing process, resulting in printing misalignment or even machine failure. In addition, the reliability of the infrared sensors of existing printers in identifying transparent paper materials is insufficient, resulting in failure to identify or misidentification, thus affecting the use. Summary of the Utility Model

[0003] In order to solve the above problems existing in the prior art, the utility model provides a modified printer. The technical problems to be solved by the utility model are realized through the following technical solutions:

[0004] The utility model provides a modified printer, including: a paper feeding component arranged on one side of the outer shell; a printing platform arranged below the paper feeding component, and a printing area is arranged on the printing platform; a moving printing component with a printing nozzle arranged inside, and the moving printing component moves within the printing area; a paper material sensor arranged close to the printing area for obtaining a paper material induction signal and outputting it; an adsorption component including: an adsorption fan arranged below the printing area for adsorbing the paper material; a paper pressing component with at least two, symmetrically arranged on both sides of the paper feeding component respectively for pressing the paper material on the paper feeding component, and the distance between each paper pressing component and the paper feeding component is adjustable; a control component arranged inside the outer shell, connected to the paper material sensor for controlling the paper material sensor to output a paper material induction signal, and respectively controlling the adsorption component and the printing platform according to the paper material induction signal.

[0005] In an embodiment of the utility model, the paper material sensor includes: a paper feeding sensor and a paper material state sensor. Among them, the paper feeding sensor is arranged on the outer shell, close to the paper feeding component, for detecting the paper material passing through the paper feeding component, obtaining a paper feeding signal and outputting it; the paper material state sensor is arranged at the bottom of the moving printing component for detecting the paper material in the printing area, obtaining a paper material presence signal and outputting it.

[0006] In an embodiment of the present utility model, both the paper feeding sensor and the paper material state sensor are photosensitive sensors. The receiving end of the paper feeding sensor is connected to its signal port, the transmitting end is connected to its power supply port, and the grounding port is respectively connected to its receiving end and transmitting end; the receiving end of the paper material state sensor is connected to its signal port, the transmitting end is connected to its power supply port, and the grounding port is respectively connected to its receiving end and transmitting end.

[0007] In an embodiment of the present utility model, a plurality of ventilation holes are spaced on the printing area of the printing platform, and the plurality of ventilation holes are all communicated with the outside.

[0008] In an embodiment of the present utility model, the adsorption assembly further includes: an adsorption plate, the adsorption plate is arranged on the printing area and at least partially covers the printing area, and a plurality of adsorption holes are spaced on the adsorption plate, and the plurality of adsorption holes are all communicated with the outside.

[0009] In an embodiment of the present utility model, mounting plates are oppositely arranged on both sides of the paper feeding assembly, and an adjustment groove is arranged on each mounting plate, and the extending direction of the adjustment groove is perpendicular to the surface of the paper feeding assembly; a plurality of paper pressing assemblies are respectively slidably connected to the adjustment grooves and fixed by screws.

[0010] In an embodiment of the present utility model, the modified printer further includes: a heating assembly, the heating assembly is arranged on the other side of the outer housing away from the paper feeding assembly; the heating assembly includes: a tray, a heating sheet, a heat conducting plate and a temperature sensor, the tray, the heating sheet and the heat conducting plate are stacked from bottom to top, and the temperature sensor is arranged on the heat conducting plate; the heating sheet and the temperature sensor are respectively connected to the control assembly; the temperature sensor is used to obtain the heating temperature; the control assembly is further used to control the heating power of the heating sheet according to the heating temperature.

[0011] In an embodiment of the present utility model, the paper material induction signal includes a paper feeding signal and a paper material presence signal; the control assembly controls the adsorption assembly and the printing platform respectively according to the paper feeding signal and the paper material presence signal.

[0012] In an embodiment of the present utility model, the control assembly includes: a first sensor control module and a first signal control module; there are two first sensor control modules, and the two first sensor control modules are respectively connected to the paper feeding sensor and the paper material state sensor in one-to-one correspondence; each first sensor control module includes: an adjustable resistor R1 and a normally open relay S1, the first end of the adjustable resistor R1 is connected to the grounding port of the paper feeding sensor or the paper material state sensor, the second end is connected to the first end of the normally open relay S1, and the second end of the normally open relay S1 is connected to the signal port of the paper feeding sensor or the paper material state sensor; the first signal control module is connected to the normally open relay S1 and is used to control the opening or closing of the normally open relay S1.

[0013] In an embodiment of the present utility model, the control assembly includes: a second sensor control module and a second signal control module; there are two second sensor control modules, and the two second sensor control modules are respectively connected to the paper feed sensor and the paper material state sensor in one-to-one correspondence; each second sensor control module includes: a normally open relay S2, a comparator CO1, and a variable resistor R2. The normally open relay S2 is connected in series between the receiving end and the signal port of the paper feed sensor or the paper material state sensor; the positive input terminal of the comparator CO1 is connected to the first end of the normally open relay S2, the second end is connected to the first end of the normally open relay S2, the output terminal is connected to the second end of the normally open relay S2, and the inverting input terminal is connected to the variable resistor R2; the first end of the variable resistor R2 is connected to the power supply voltage terminal, and the second end is connected to the ground terminal; the second signal control module is connected to the normally open relay S2 for controlling the opening or closing of the normally open relay S2.

[0014] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0015] For the modified printer of the present utility model, the clamping stability during the paper feeding process is ensured by the pressure paper assembly arranged on both sides and with adjustable distance; the paper material is adsorbed from bottom to top by the adsorption assembly to achieve clamping during the printing process; the control assembly assists in controlling the paper material sensor to generate a paper material signal, rather than relying solely on the recognition ability of the sensor itself, improving the recognition reliability of the transparent paper material.

[0016] The above description is only an overview of the technical solution of the present utility model. In order to be able to understand the technical means of the present utility model more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features, and advantages of the present utility model more obvious and understandable, the following preferred embodiments are specifically given and described in detail in conjunction with the accompanying drawings as follows. Description of the Drawings

[0017] Figure 1 It is a schematic structural diagram of the modified printer provided by the embodiment of the present utility model;

[0018] Figure 2 It is a top view of the structure of the modified printer provided by the embodiment of the present utility model;

[0019] Figure 3 It is a schematic structural diagram (partial) of the modified printer provided by the embodiment of the present utility model;

[0020] Figure 4 It is a schematic structural diagram of the adsorption plate provided by the embodiment of the present utility model;

[0021] Figure 5 It is a schematic structural diagram of the pressure paper assembly provided by the embodiment of the present utility model;

[0022] Figure 6It is the working principle diagram of the paper feeding sensor provided by the embodiment of the present utility model;

[0023] Figure 7 It is the schematic diagram of a control component provided by the embodiment of the present utility model;

[0024] Figure 8 It is the schematic diagram of another control component provided by the embodiment of the present utility model;

[0025] Figure 9 It is the working flow chart of the modified printer provided by the embodiment of the present utility model.

[0026] Icons: 1 - Paper material sensor; 11 - Paper feeding sensor; 12 - Paper material state sensor; 2 - Adsorption component; 21 - Adsorption plate; 211 - Adsorption hole; 22 - Adsorption fan; 3 - Paper pressing component; 4 - Heating component; 5 - Control component; 51 - First sensor control module; 52 - First signal control module; 53 - Second sensor control module; 54 - Second signal control module; 100 - Outer housing; 200 - Paper feeding component; 210 - Mounting plate; 220 - Adjusting groove; 300 - Printing platform; 400 - Mobile printing component. Specific embodiments

[0027] In order to further elaborate on the technical means and effects adopted by the present utility model to achieve the intended utility model purpose, the following provides a detailed description of a modified printer proposed according to the present utility model in combination with the accompanying drawings and specific embodiments.

[0028] The foregoing and other technical contents, features and effects of the present utility model can be clearly presented in the following detailed description in conjunction with the accompanying drawings. Through the description of the specific embodiments, a more in-depth and specific understanding of the technical means and effects adopted by the present utility model to achieve the intended purpose can be obtained. However, the accompanying drawings are only for reference and illustration, and are not used to limit the technical solution of the present utility model.

[0029] Embodiment 1

[0030] Such as Figure 1 、 Figure 2 And Figure 3As shown in the figure, the present utility model provides a modified printer, including: a paper feeding component 200, arranged on one side of the outer housing 100; a printing platform 300, arranged below the paper feeding component 200, and a printing area is arranged on the printing platform 300; a mobile printing component 400, with a printing nozzle arranged inside, and the mobile printing component 400 moves within the printing area; a paper material sensor 1, arranged close to the printing area, used to obtain a paper material induction signal and output it; an adsorption component 2, including: an adsorption fan 22, arranged below the printing area, used to adsorb the paper material; a paper pressing component 3, with at least two, symmetrically arranged on both sides of the paper feeding component 200 respectively, used to press the paper material on the paper feeding component 200, and the distance between each paper pressing component 3 and the paper feeding component 200 is adjustable; a control component 5, arranged inside the outer housing 100, connected to the paper material sensor 1, used to control the paper material sensor 1 so that the paper material sensor 1 outputs a paper material induction signal; the control component 5 is respectively connected to control the adsorption component 2 and the printing platform 300, and is also used to respectively control the adsorption component 2 and the printing platform 300 according to the paper material induction signal.

[0031] To achieve the automated operation of the printer, sensors are often used to identify the position of the paper material. However, its recognition reliability for transparent paper materials is insufficient because the reflection occurring on paper materials with a certain transparency is weak, and the signal obtained by the sensor is difficult to distinguish from the background, so it is considered to be in a paperless state.

[0032] In view of this, this embodiment provides a paper material sensor 1, and the control component 5 controls the paper material sensor 1 to obtain a paper material induction signal.

[0033] In an optional implementation manner, as Figure 1 shown, it includes: a paper feeding sensor 11 and a paper material state sensor 12. Among them, the paper feeding sensor 11 is arranged on the outer housing 100, close to the paper feeding component 200, used to detect the paper material passing through the paper feeding component 200, obtain a paper feeding signal and output it; the paper material state sensor 12 is arranged at the bottom of the mobile printing component 400, used to detect the paper material in the printing area, obtain a paper material presence signal and output it.

[0034] Specifically, the paper material induction signal includes a paper feeding signal and a paper material presence signal; the control component 5 respectively controls the adsorption component 2 and the printing platform 300 according to the paper feeding signal and the paper material presence signal.

[0035] As Figure 6As shown, the paper feed sensor 11 and the paper material status sensor 12 are both photosensitive sensors. Taking the paper feed sensor 11 as an example, the receiving end of the paper feed sensor 11 is connected to its signal port, the transmitting end is connected to its power supply port, and the grounding port is respectively connected to its receiving end and transmitting end; the receiving end of the paper material status sensor 12 is connected to its signal port, the transmitting end is connected to its power supply port, and the grounding port is respectively connected to its receiving end and transmitting end.

[0036] In an alternative embodiment, as Figure 7 shown, the control component 5 includes: a first sensor control module 51 and a first signal control module 52; there are two first sensor control modules 51, and the two first sensor control modules 51 are respectively connected to the paper feed sensor 11 and the paper material status sensor 12 in one-to-one correspondence; each first sensor control module 51 includes: a variable resistor R1 and a normally open relay S1. The first end of the variable resistor R1 is connected to the grounding port of the paper feed sensor 11 or the paper material status sensor 12 (taking the connection to the paper feed sensor 11 as an example), the second end is connected to the first end of the normally open relay S1, and the second end of the normally open relay S1 is connected to the signal port of the paper feed sensor 11 or the paper material status sensor 12; the first signal control module 52 is connected to the normally open relay S1 and is used to control the opening or closing of the normally open relay S1.

[0037] The principle is as follows: The receiving end of the photosensitive sensor can be equivalent to a photoresistor. When the light received by its receiving end is stronger, the resistance value of the photoresistor is lower; when the light received is weaker, the resistance value of the photoresistor is larger. Taking the semi-transparent DTF film (Direct to Film) as an example, less light is reflected back to the receiving end of the photosensitive sensor from it, making the resistance value of the photoresistor larger, so it is determined to be a paperless state, resulting in a printer error.

[0038] On this basis, a variable resistor R1 is connected in parallel with the photoresistor, and a normally open relay S1 is set in this branch of the variable resistor R1. When paper material enters, the electrical characteristics of the photoresistor are still higher than the background (i.e., the situation when there is truly no paper); at this time, the first signal control module 52 controls the normally open relay S1 to close, thereby achieving parallel connection, so that the parallel resistance is close to or equal to the resistance value of the photoresistor corresponding to ordinary paper material, and thus the paper material induction signal can be normally output.

[0039] In another alternative embodiment, as Figure 8As shown, the control component 5 may further include: a second sensor control module 53 and a second signal control module 54; there are two second sensor control modules 53, and the two second sensor control modules 53 are respectively connected to the paper feed sensor 11 and the paper material state sensor 12 in one-to-one correspondence; each second sensor control module 53 includes: a normally open relay S2, a comparator CO1, and a variable resistor R2. The normally open relay S2 is connected in series between the receiving end and the signal port of the paper feed sensor 11 or the paper material state sensor 12 (taking the connection to the paper feed sensor 11 as an example); the positive input terminal of the comparator CO1 is connected to the first end of the normally open relay S2, the second end is connected to the first end of the normally open relay S2, the output terminal is connected to the second end of the normally open relay S2, and the inverting input terminal is connected to the variable resistor R2; the first end of the variable resistor R2 is connected to the power supply voltage terminal VCC, and the second end is connected to the ground terminal GND; the second signal control module 54 is connected to the normally open relay S2 and is used to control the opening or closing of the normally open relay S2.

[0040] The principle is as follows: By setting the comparator CO1 to compare the output voltage at the receiving end with the reference voltage in real time. When the output voltage is significantly lower than the voltage in the case of no paper, the comparator CO1 outputs a voltage signal close to or equal to the voltage corresponding to ordinary paper material, so that the paper material induction signal can be normally output. On this basis, by setting the resistance of the variable resistor R2 to change the reference voltage of the comparison circuit, the applicability is improved. In addition, by controlling the opening or closing of the normally open relay S2 through the second signal control module 54, it is ensured that the comparator circuit is only started during operation, avoiding the situation where the printer determines that there is paper due to mis-triggering.

[0041] In an optional embodiment, a plurality of ventilation holes are arranged at intervals on the printing area of the printing platform 300, and the plurality of ventilation holes are all communicated with the outside. The adsorption fan 22 is arranged below the printing area and adsorbs the paper material located in the printing area by using the ventilation holes.

[0042] Further, as Figure 2 、 Figure 3 and Figure 4As shown in the figure, to ensure the adsorption effect, the adsorption component 2 further includes: an adsorption plate 21. The adsorption plate 21 is disposed on the printing area and at least partially covers the printing area. A plurality of adsorption holes 211 are spaced apart on the adsorption plate 21, and the plurality of adsorption holes 211 are all communicated with the outside. The plurality of adsorption holes 211 are arranged on the adsorption plate 21 by means such as additive manufacturing or machining. Preferably, the adsorption holes 211 at the position directly above the adsorption fan 22 on the adsorption plate 21 are arranged sparsely, and the adsorption holes 211 in the edge area are arranged densely. By correspondingly arranging the adsorption holes 211 with the adsorption fan 22, the adsorption force on the paper material is kept uniform. In addition, the adsorption plate 21 can entirely cover a plurality of ventilation holes on the printing area, or the printing area can be set to be open, and then the adsorption plate 21 entirely covers the printing area.

[0043] In an alternative embodiment, as Figure 5 shown, mounting plates 210 are oppositely arranged on both sides of the paper feeding component 200. An adjustment slot 220 is provided on each mounting plate 210, and the extending direction of the adjustment slot 220 is perpendicular to the surface of the paper feeding component 200; a plurality of paper pressing components 3 are respectively slidably connected to the adjustment slot 220 and fixed by screws.

[0044] It should be noted that taking the vertical paper feeding component 200 as an example, a plurality of paper pressing components 3 are symmetrically arranged on both sides of the paper feeding component 200, and the paper material is clamped between the plurality of paper pressing components 3 and the paper feeding component 200. Due to the difference in the thickness of the paper material, the applicability is improved by adjusting the distance through the adjustment slot 220. At the same time, since the friction and stiffness of the transparent paper material are both insufficient, it is likely to cause abnormal sliding or deformation. By providing the paper pressing components 3, an auxiliary supporting effect is also achieved.

[0045] Preferably, the length of a single paper pressing component 3 is greater than or equal to 6 cm.

[0046] In an alternative embodiment, as Figure 1 and Figure 2 shown, for the case where the paper material needs to be heated before or after printing, a heating component 4 is provided. The heating component 4 is disposed on the other side of the outer housing 100 away from the paper feeding component 200; the heating component 4 includes: a tray, a heating sheet, a heat conducting plate, and a temperature sensor (not shown in the figure). The tray, the heating sheet, and the heat conducting plate are stacked from bottom to top, and the temperature sensor is disposed on the heat conducting plate; the heating sheet and the temperature sensor are respectively connected to the control component 5; the temperature sensor is used to obtain the heating temperature; the control component 5 is further used to control the heating power of the heating sheet according to the heating temperature.

[0047] Exemplarily, the temperature sensor is a thermocouple temperature sensor, which detects the temperature of the heating sheet in real time and feeds it back to the control component 5, and then regulates the power of the heating sheet through the control component 5 to ensure the stability of the heating temperature.

[0048] As Figure 1 and Figure 9 shown, the working principle of the modified printer in this embodiment is as follows: The paper feeding component 200 starts to feed paper. When the paper feeding sensor 11 outputs a paper feeding signal, it is controlled by the control component 5, and the adsorption component 2 starts to adsorb the paper material onto the printing area. When the paper material state sensor 12 outputs a paper material presence signal, it is controlled by the control component 5, and the moving printing component 400 starts to print. After printing is completed, heating is performed through the heating component 4, and the control component 5 controls the heating temperature to complete the printing.

[0049] For the modified printer of the present utility model, the clamping stability during the paper feeding process is ensured by the pressure paper components arranged on both sides with adjustable distance; the paper material is adsorbed from bottom to top by the adsorption component to achieve clamping during the printing process; the control component is used to assist in controlling the paper material sensor to generate a paper material signal, rather than relying solely on the recognition ability of the sensor itself, thereby improving the recognition reliability of the transparent paper material.

[0050] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "comprising", "including" or any other variant is intended to cover non-exclusive inclusion, so that an article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed. Without further limitation, an element defined by the statement "including one..." does not exclude the existence of another identical element in the article or device including the said element. "Connection" or "connected" and other similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. The orientation or positional relationship indicated by "up", "down", "left", "right", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation on the present utility model.

[0051] The above content is a further detailed description of the present utility model in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present utility model is only limited to these descriptions. For those of ordinary skill in the technical field to which the present utility model belongs, without departing from the concept of the present utility model, several simple deductions or substitutions can still be made, and all should be regarded as belonging to the protection scope of the present utility model.

Claims

1. A modified printer, characterized in that: include: A paper feeding assembly (200) is arranged on one side of the outer shell (100); The printing platform (300) is arranged below the paper feeding assembly (200), and a printing area is arranged on the printing platform (300); A mobile printing component (400) is provided with a printing nozzle inside, and the mobile printing component (400) moves within the printing area; A paper material sensor (1), arranged near the printing area, for obtaining and outputting a paper material sensing signal; An adsorption component (2) comprises: an adsorption fan (22) arranged below the printing area and used for adsorbing paper; There are at least two paper pressing assemblies (3), which are symmetrically arranged on both sides of the paper feeding assembly (200) and are used to press the paper material onto the paper feeding assembly (200), and the distance between each of the paper pressing assemblies (3) and the paper feeding assembly (200) is adjustable; A control component (5) is arranged in the outer shell (100), connected to the paper sensor (1), and used to control the paper sensor (1) so that the paper sensor (1) outputs a paper sensing signal, and controls the adsorption component (2) and the printing platform (300) respectively according to the paper sensing signal.

2. The modified printer according to claim 1, characterized in that: The paper material sensor (1) comprises: a paper feed sensor (11) and a paper material status sensor (12), wherein: The paper feed sensor (11) is arranged on the outer shell (100) and is arranged close to the paper feed assembly (200), and is used to detect the paper passing through the paper feed assembly (200), obtain a paper feed signal and output it; the paper status sensor (12) is arranged at the bottom of the mobile printing assembly (400), and is used to detect the paper in the printing area, obtain a paper presence signal and output it.

3. The modified printer according to claim 2, characterized in that: The paper feed sensor (11) and the paper material status sensor (12) are both photosensitive sensors; the receiving end of the paper feed sensor (11) is connected to its signal port, the transmitting end is connected to its power supply port, and the grounding port is respectively connected to its receiving end and transmitting end; the receiving end of the paper material status sensor (12) is connected to its signal port, the transmitting end is connected to its power supply port, and the grounding port is respectively connected to its receiving end and transmitting end.

4. The modified printer according to claim 1, characterized in that: A plurality of ventilation holes are arranged at intervals on the printing area of ​​the printing platform (300), and the plurality of ventilation holes are all connected to the outside.

5. The modified printer according to claim 1, characterized in that: The adsorption component (2) further comprises: an adsorption plate (21), the adsorption plate (21) being arranged on the printing area and at least partially covering the printing area, a plurality of adsorption holes (211) being arranged at intervals on the adsorption plate (21), and the plurality of adsorption holes (211) are all connected to the outside.

6. The modified printer according to claim 1, characterized in that: Mounting plates (210) are arranged opposite to each other on both sides of the paper feeding assembly (200); each mounting plate (210) is provided with an adjustment slot (220); the extension direction of the adjustment slot (220) is perpendicular to the surface of the paper feeding assembly (200); and a plurality of the paper pressing assemblies (3) are respectively slidably connected to the adjustment slots (220) and fixed by screws.

7. The modified printer according to claim 1, characterized in that: Also includes: a heating component (4), the heating component (4) being arranged on the other side of the outer shell (100) away from the paper feeding component (200); The heating component (4) comprises: a tray, a heating plate, a heat conducting plate and a temperature sensor, wherein the tray, the heating plate and the heat conducting plate are stacked from bottom to top, and the temperature sensor is arranged on the heat conducting plate; the heating plate and the temperature sensor are respectively connected to the control component (5); the temperature sensor is used to obtain a heating temperature; and the control component (5) is also used to control the heating power of the heating plate according to the heating temperature.

8. The modified printer according to claim 2, characterized in that: The paper material sensing signal comprises: the paper feeding signal and the paper material presence signal; the control component (5) controls the adsorption component (2) and the printing platform (300) respectively according to the paper feeding signal and the paper material presence signal.

9. The modified printer according to claim 3, characterized in that: The control component (5) comprises: a first sensor control module (51) and a first signal control module (52); there are two first sensor control modules (51), and the two first sensor control modules (51) are connected to the paper feed sensor (11) and the paper state sensor (12) in a one-to-one correspondence; Each of the first sensor control modules (51) comprises: an adjustable resistor R1 and a normally open relay S1, wherein a first end of the adjustable resistor R1 is connected to a ground port of the paper feed sensor (11) or the paper material status sensor (12), a second end of the adjustable resistor R1 is connected to a first end of the normally open relay S1, and a second end of the normally open relay S1 is connected to a signal port of the paper feed sensor (11) or the paper material status sensor (12); The first signal control module (52) is connected to the normally open relay S1 and is used to control the normally open relay S1 to open or close.

10. The modified printer according to claim 3, characterized in that: The control component (5) comprises: a second sensor control module (53) and a second signal control module (54); there are two second sensor control modules (53), and the two second sensor control modules (53) are connected to the paper feed sensor (11) and the paper state sensor (12) in a one-to-one correspondence; Each of the second sensor control modules (53) comprises: a normally open relay S2, a comparator CO1 and an adjustable variable resistor R2, wherein the normally open relay S2 is connected in series between the receiving end and the signal port of the paper feed sensor (11) or the paper state sensor (12); the positive phase input end of the comparator CO1 is connected to the first end of the normally open relay S2, the second end is connected to the first end of the normally open relay S2, the output end is connected to the second end of the normally open relay S2, and the negative phase input end is connected to the adjustable variable resistor R2; the first end of the adjustable variable resistor R2 is connected to the power supply voltage end, and the second end is connected to the ground end; The second signal control module (54) is connected to the normally open relay S2 and is used to control the normally open relay S2 to open or close.

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