Ink-jet printer

Abstract

An ink-jet printer belongs to the technical field of printer equipment and comprises an ink-jet printer body, a vibration motor, a pressure resistor, a time delay circuit, a high-pressure prompt circuit and a low-pressure detection circuit. A mounting hole is formed in the inner side of a pipeline connected between each spray head and each nozzle, and a plurality of pressure resistors are respectively mounted in the plurality of mounting holes; the vibration motor is installed at the outer side end of the ink box, and the vibration motor, the delay circuit, the high-pressure prompt circuit and the low-pressure detection circuit are installed in the element box. Under the combined action of the high-pressure prompting circuit, the pressure prompting circuit and the time delay circuit, the pressure of ink entering the nozzle can be detected, when the pressure is too high or too low, a user can be prompted to conduct maintenance in time through different light emitting diodes, in the using process, the ink in the ink box can be vibrated through the vibration motor, and therefore the pressure of the ink in the nozzle can be detected. The problem that ink precipitation causes adverse effects on the printing quality is solved, convenience is brought to users, and the printing quality is correspondingly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of printer equipment, in particular to an inkjet printer. Background Art

[0002] Inkjet printers use a nozzle to spray tiny droplets of ink onto paper, creating text or images. The technologies used in inkjet printers primarily include thermal and micro-piezoelectric technologies. Thermal inkjet printers, under program control, rapidly heat the ink fed through the ink cartridge via a micro-heating element, causing bubbles to form. These bubbles expand and push the ink out of the nozzle, forming droplets. When the bubbles disappear, the ink in the nozzle is re-absorbed for the next spray. This process repeats continuously, producing the desired text or image on paper. Thermal inkjet printers have the advantages of fast printing speeds and low costs, but the ink is susceptible to chemical changes at high temperatures, which can affect print quality to a certain extent. When working, the micro-piezoelectric inkjet printer is under program control. It uses piezoelectric elements to control the ink input through the ink cartridge and ejected through the nozzle under the action of voltage. The piezoelectric elements contract and extend under signal control, precisely controlling the shape and flight direction of the ink droplets, and then printing the required text or pictures on the paper. The advantages of micro-piezoelectric inkjet printers are high printing quality and the ink will not undergo chemical changes due to heating, but the cost is relatively high and it is not suitable for high-speed printing.

[0003] In fact, whether it is a thermal bubble inkjet printer or a micro-piezoelectric inkjet printer, except for the different structures of the printhead (the nozzle at the bottom), the structures of other components are similar (when working, the multiple power output terminals of the inkjet printer control circuit board, under the joint action of its internal program and the PC program, control the related equipment of different multiple printheads to receive power separately). The ink pressure output by the nozzle of the inkjet printer nozzle is directly related to the quality of the text or image printed by the inkjet. When due to various reasons, such as damage to the pipe connecting the nozzle to the ink tank, the ink in the ink tank is used up, the nozzle itself or the pipe connected to the nozzle is blocked or damaged, there is a chance that the pressure of the ink liquid ejected by the nozzle is too high or too low, resulting in the quality of the subsequent inkjet printed paper text or pattern unqualified (for example, if the pressure is too low, the printed text or image will be discontinuous; if the pressure is too high, the printed text or pattern ink will accumulate, which will affect the quality of the text or image printed on the paper). Existing inkjet printers lack nozzle quality monitoring capabilities. Typically, users only investigate specific issues after they notice them. This results in unnecessary paper waste and hinders office efficiency. Furthermore, existing inkjet printers lack ink tank vibration and mixing capabilities. This leads to the risk of ink settling in the cartridges after extended periods of inactivity, adversely affecting print quality. Utility Model Content

[0004] In order to overcome the drawbacks of existing inkjet printers due to structural limitations as described in the background, the utility model provides an inkjet printer body. Under the joint action of relevant mechanisms, the relevant equipment of each nozzle is powered and working, and at the same time, the pressure of the ink entering the nozzle can be detected. When the pressure is too high or too low, the user can be promptly prompted to perform maintenance. In addition, during use, the ink in the ink cartridge can be vibrated by a vibration motor, which brings convenience to the user and correspondingly improves the printing quality.

[0005] The technical solution adopted by the utility model to solve its technical solution is:

[0006] An inkjet printer includes an inkjet printer body, a vibration motor, a pressure resistor, and also has a delay circuit, a high pressure prompt circuit, and a low pressure detection circuit; the delay circuit, high pressure prompt circuit, low pressure detection circuit, and pressure resistor are respectively multi-channel and the number is consistent with the number of inkjet printer nozzles, and each nozzle is equipped with a delay circuit, a high pressure prompt circuit, a low pressure detection circuit, and a pressure resistor. The inner side of the pipe connecting the nozzle and the nozzle of each inkjet printer body has a mounting hole, and multiple pressure resistors are respectively installed in the multiple mounting holes; the vibration motor is mounted on the inkjet printer body At the outer end of the ink cartridge, the vibration motor, the delay circuit, the high pressure prompt circuit, and the low pressure detection circuit are installed in the component box of the inkjet printer body; the signal output end of each delay circuit is electrically connected to one end of each pressure resistor, and the other end of each pressure resistor is electrically connected to the signal input end of each high pressure prompt circuit and low pressure detection circuit; multiple positive power output ends of the control circuit board of the inkjet printer body are electrically connected to the signal input end of the multiple delay circuits, and the power output end of the multiple delay circuits is electrically connected to the signal input ends of the multiple high pressure prompt circuits and low pressure detection circuits respectively.

[0007] Preferably, the pressure resistor is equipped with a resistor, and the resistor is electrically connected to one end of the pressure resistor.

[0008] Preferably, the delay circuit includes an electrically connected relay, a capacitor, a resistor, and a transistor, the transistor collector is connected to the negative pole of the relay, the positive power input end of the relay is connected to the control power input end, one end of the first resistor is connected to one end of the second resistor and the positive pole of the capacitor, the other end of the second resistor is connected to the base of the transistor, and the negative pole of the capacitor is connected to the emitter of the transistor.

[0009] Preferably, the high pressure warning circuit includes an electrically connected resistor, a transistor, and a light-emitting diode, one end of the first resistor is connected to the positive electrode of the light-emitting diode, the collector of the transistor is connected to the negative electrode of the light-emitting diode, the base of the transistor is connected to one end of the second resistor and one end of the third resistor, and the other end of the third resistor is connected to the emitter of the transistor.

[0010] Preferably, each low pressure warning circuit includes an electrically connected resistor, a transistor, a light-emitting diode and a resistor, one end of the first resistor is connected to the positive electrode of the light-emitting diode, the collector of the first transistor is connected to the negative electrode of the light-emitting diode, the emitters of the first transistor and the second transistor are connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third resistor and the base of the second transistor, one end of the fourth resistor is connected to the collector of the second transistor and the base of the first transistor, and the other end of the fourth resistor is connected to the other end of the first resistor.

[0011] Preferably, the second resistor of the high pressure prompt circuit and the third resistor of the low pressure prompt circuit are adjustable resistors.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows: the present invention is based on the inkjet printer body, and under the joint action of relevant mechanisms, the relevant equipment of each nozzle is powered on and working, and under the joint action of the high pressure prompt circuit, the pressure prompt circuit and the delay circuit, the ink pressure entering the nozzle can be detected. When the pressure is too high or too low, the user can be promptly prompted to perform maintenance through different light-emitting diodes. In addition, during use, the ink in the ink cartridge can be vibrated by a vibration motor, which reduces the problem of ink precipitation having an adverse effect on printing quality, brings convenience to users, and correspondingly improves printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 This is a schematic diagram of the overall structure of the inkjet printer body of the utility model;

[0014] Figure 2 This is a schematic diagram of the ink cartridge and vibration motor structure of the inkjet printer body of the utility model;

[0015] Figure 3 This is a schematic diagram of the structure of the nozzle assembly of the inkjet printer body of the utility model;

[0016] Figure 4 This is a schematic diagram of the partial cross-sectional structure of the nozzle assembly of the inkjet printer body of the utility model;

[0017] Figure 5 This is a circuit diagram of the utility model. DETAILED DESCRIPTION

[0018] Figure 1-Figure 5As shown, an inkjet printer includes an inkjet printer body 1, a vibration motor M, a power module T1, a small pressure resistor RT, and also has a delay circuit 2, a high pressure prompt circuit 3, and a low pressure detection circuit 4; the delay circuit 2, the high pressure prompt circuit 3, the low pressure detection circuit 4, and the pressure resistor RT are respectively four-way and the number is the same as the number of the inkjet printer's nozzles 5, each nozzle 5 is equipped with a delay circuit 2, a high pressure prompt circuit 3, a low pressure detection circuit 4, and a pressure resistor RT, and the pipe 53 connecting each nozzle 5 and the nozzle 51 has an outwardly protruding mounting hole 52 at the middle left inner end. The four pressure resistors are connected to the nozzle 51. The four pressure resistors RT are mounted on a circuit board. The circuit boards for the four pressure resistors RT are mounted in four mounting holes, with the pressure-bearing surfaces of the pressure resistors RT located on the right side of the pipe 53. The pressure resistors RT and the pressure-bearing surfaces are aligned vertically with the left side of the pipe 53 (the wires connected to the pressure resistors RT are led outward through the opening on the left end of the pipe 53, which is sealed with sealant). The vibration motor M is fixedly mounted in the middle of the rear outer end of the ink cartridge 101 of the inkjet printer body. The vibration motor M, power module T1, delay circuit 2, high-pressure indication circuit 3, and low-pressure detection circuit 4 are mounted in the component box of the inkjet printer body 1. The following content uses the operating principles of one of the small pressure resistors and one delay circuit, high-pressure indication circuit, and low-pressure detection circuit as a representative illustration.

[0019] Figure 1-Figure 5As shown, the pressure resistor RT is equipped with a resistor R3, and one end of the resistor R3 is connected to the pressure resistor RT via a wire. Each delay circuit includes a relay J, a capacitor C1, resistors R1 (adjustable resistor) and R2, and a transistor VT1, all connected via circuit board wiring. The collector of transistor VT1 is connected to the negative terminal of relay J, the positive power input terminal of relay J is connected to the control power input terminal, one end of the first resistor R1 is connected to one end of the second resistor R2 and the positive terminal of capacitor C1, the other end of the second resistor R2 is connected to the base of transistor VT1, and the negative terminal of capacitor C1 is connected to the emitter of transistor VT1. Each pressure resistor RT is equipped with a resistor R3, and resistor R3 is electrically connected to one end of the pressure resistor RT. Each high pressure warning circuit includes resistors R4, R5, R6, transistor VT2, and light-emitting diode V1 connected through circuit board wiring. One end of the first resistor R6 is connected to the positive electrode of the light-emitting diode V1, the collector of the transistor VT2 is connected to the negative electrode of the light-emitting diode V1, the base of the transistor VT2 is connected to one end of the second resistor R4 and one end of the third resistor R5, and the other end of the third resistor R5 is connected to the emitter of the transistor VT2. Each low-pressure warning circuit includes resistors R7, R8, R9, and R10, transistors VT3 and VT4, and a light-emitting diode (LED) V2, all connected via circuit board wiring. One end of the first resistor R10 is connected to the anode of LED V2, the collector of the first transistor VT4 is connected to the cathode of LED V2, the emitters of the first and second transistors VT4 and VT3 are connected to one end of the second resistor R8, the other end of the second resistor R8 is connected to one end of the third resistor R7 and the base of the second transistor VT3, one end of the fourth resistor R9 is connected to the collector of the second transistor VT3 and the base of the first transistor VT4, and the other end of the fourth resistor R9 is connected to the other end of the first resistor R10. The second resistor R4 of the high-pressure warning circuit and the third resistor R7 of the low-pressure warning circuit are adjustable resistors. The light-emitting surfaces of the LEDs in the four high-pressure warning circuits and the low-pressure warning circuit, as well as the power switch handle, are located outside multiple openings on the front outer side of the inkjet printer housing.

[0020] Figure 1-Figure 5As shown, power input terminals 1 and 2 of power module T1 are connected to the two poles of the AC 220V power supply of the inkjet printer body via wires. Power output terminals 3 and 4 of power module T1 are connected to the positive power input terminal of relay J and the negative terminal of capacitor C1 of the four delay circuits, the other end of resistor R6 and the emitter of transistor VT2 of the high pressure indication circuit, the other end of capacitor R10 and the emitter of transistor VT4 of the low pressure detection circuit, and the other end of resistor R3, respectively. The normally open contact terminal of relay J at the signal output terminal of each delay circuit is connected to the other end of each pressure resistor RT via wires. One end of each pressure resistor RT is connected to the other end of resistor R4 at the signal input terminal of each high pressure indication circuit and the other end of resistor R7 at the signal input terminal of the low pressure detection circuit via wires. The power input end of the vibration motor M is connected in series with the power output ends 3 and 4 of the power module T1 through a power switch S, respectively, via wires. The four positive power output ends XN of the inkjet printer body control circuit board T2 and the other end of the resistor R1, the signal input end of the four-way delay circuit, are also connected via wires.

[0021] Figure 1-Figure 5As shown, the present invention is based on a thermal bubble inkjet printer body 1. When in operation, the thermal bubble inkjet printer body 1, under program control, rapidly heats the ink inputted through the ink cartridge via a micro-heating element, causing bubbles to form. The bubbles expand and push the ink out of the nozzle, forming ink droplets. When the bubbles disappear, the ink in the nozzle is re-absorbed for the next ejection. The above process is repeated continuously, and the desired text or image can be printed on paper. The above is a mature existing technology and will not be described in detail in this application. When the power input terminal of the power module T1 is energized, its 3rd and 4th pins output a stable DC 12V power supply to the power input terminals of the four-way delay circuit, the high pressure prompt circuit, and the low pressure detection circuit, and the above circuits are energized and activated. Each time the user turns on the power switch S1, the vibration motor M is energized and activated. The vibration motor M1 generates vibrations that vibrate the ink in the ink cartridge 101, reducing the problem of ink sedimentation adversely affecting print quality, bringing convenience to the user and correspondingly improving print quality. When the thermal inkjet printer body 1 is working, the multiple power output terminals of the inkjet printer body control circuit board, under the joint action of its internal program and the PC program, control the related equipment of the four different nozzles to receive power respectively. At the same time, the 12V power supply will enter the other end of the four pressure resistors RT through the power input terminal and the normally open contact terminal of the relay J. When the corresponding inkjet printer control circuit board controls the related equipment of one or more nozzles to be powered on, the power output from one or more positive power output terminals XN will be reduced in voltage and limited in current by the resistor R1 of the corresponding one or more delay circuits to charge the capacitor C1. During the initial time (during this period, the ink in the ink cartridge has not yet effectively entered the nozzle end, and the pressure in the pipes connected to the nozzles is relatively low, for example, the time is 1 second, and the delay can prevent false alarms), when the capacitor C1 is not fully charged, the power output from one or four positive power output terminals XN will be reduced in voltage and limited in current by the adjustable resistors R1 and R2 to enter the base of the transistor VT1 to a value lower than 0.7V, and the transistor VT1 will not conduct. Then, the relay J will not be energized and attracted, and the corresponding one or more high-pressure warning circuits and low-pressure detection circuits will not be energized and work. After a period of time (the time is adjustable during production, and the time is equal to 1.1*resistance value of resistor R1*capacity of capacitor C1), when capacitor C1 is fully charged, the 12V power supply enters the base of transistor VT1 through resistors R1 and R2 with a voltage reduction and current limiting value, and the voltage is higher than 0.7V. Transistor VT1 will turn on the collector and output a low level to the negative power input terminal of relay J. Then, relay J will be energized to close its control power input terminal and normally open contact terminal, and the corresponding one or more high pressure prompt circuits and low pressure detection circuits will receive input signals.After one or more corresponding high-pressure prompt circuits are energized and working, when the pressure in the corresponding one or more nozzles is relatively appropriate and not too high (for example, lower than 3.0MPa, different models of inkjet printers have different pressures, which can be set according to the resistance of resistor R4), the pressure on the corresponding pressure resistor RT is relatively low and its resistance value is relatively large (large voltage division), and the voltage signal is divided by the pressure resistor RT and the resistor R3, and the voltage divided by the adjustable resistor R4 and the resistor R5 enters the base of the transistor VT22 and is lower than 0.7V. The transistor VT2 is not conducting and the collector does not output a low level. The light-emitting diode V1 will not be energized and emit light, indicating that the pressure of the corresponding nozzle is not too high. When the pressure in one or more nozzles is relatively high (for example, higher than 3.0MPa), the pressure on the corresponding pressure resistor RT is relatively high and its resistance value is relatively small (small voltage division). The voltage signal is divided by the pressure resistor RT and the resistor R3, and the voltage is divided by the adjustable resistor R4 and the resistor R5 and enters the base of the transistor VT2, which is higher than 0.7V. The transistor VT2 is turned on and the collector outputs a low level which enters the negative power input terminal of the light-emitting diode V1 (resistor R6 limits the current and reduces the voltage). The light-emitting diode V1 will be electrified and emit light, indicating that the pressure of the corresponding nozzle is too high. After one or more corresponding low pressure prompt circuits are powered on, when the pressure in one or more corresponding nozzles is relatively appropriate and not too low (for example, higher than 2.8MPa, different types of inkjet printers have different pressures, which can be set according to the resistance value of resistor R7), the pressure on the corresponding pressure resistor RT is relatively high and its resistance value is relatively small (small voltage division), and the voltage signal is divided by the pressure resistor RT and the resistor R3, and the voltage divided by the adjustable resistor R7 and the resistor R8 enters the base of the transistor VT3 and is higher than 0.7V. The transistor VT3 is turned on and the collector outputs a low level and enters the base of the transistor VT4. The base of the transistor VT4 is cut off without a suitable forward bias, and then the light-emitting diode V2 will not be powered on to emit light, indicating that the pressure of the corresponding nozzle is not too low; when the corresponding one When the pressure in one or more nozzles is relatively too low (for example, lower than 2.8MPa, different types of inkjet printers have different pressures, which can be set according to the resistance value of resistor R7), the pressure on the corresponding pressure resistor RT is relatively low and its resistance value is relatively large (large voltage division), and the voltage signal is divided by the pressure resistor RT and the resistor R3, and the voltage divided by the adjustable resistor R7 and the resistor R8 enters the base of the transistor VT3 and is lower than 0.7V. The collector of the transistor VT3 is cut off and no longer outputs a low level and enters the base of the transistor VT4. The base of the transistor VT4 obtains a suitable forward bias voltage through the resistor R9, turns on the collector, outputs a low level, and enters the negative power input terminal of the light-emitting diode V2. The light-emitting diode V2 is energized and emits light, indicating that the pressure in one or more nozzles is relatively too low.

[0022] Figure 1-Figure 5As shown, through all the above technical solutions, the utility model can detect the pressure of ink entering the nozzle under the joint action of relevant mechanisms, while the relevant equipment of each nozzle is powered and working, under the joint action of the high pressure prompt circuit, the pressure prompt circuit and the delay circuit. When the pressure is too high or too low, the user can be promptly prompted to perform maintenance through different light-emitting diodes. In addition, during use, the ink in the ink cartridge can be vibrated by a vibration motor, which reduces the problem of ink precipitation affecting the printing quality, brings convenience to the user, and correspondingly improves the printing quality. In the figure, the adjustable resistor R1 has a resistance of 4.7M (adjusted to 0.9M), the resistor R2 has a resistance of 470K, the capacitor C1 has a capacity of 1μF, the transistor VT1 is a 9013, the relay J is a DC12V, and the power module T1 is a finished AC 220V to DC 12V switching power supply module; the resistance values ​​of resistors R3, R5, R6, R8, R9, and R10 are 4K, 4K, 1.8K, 4K, 200K, and 1.8K, respectively; the resistance values ​​of adjustable resistors R4 and R7 are 10K (adjusted to 3K and 2.8K, respectively); the transistors VT2, VT3, and VT4 are 9013; the light-emitting diodes V1 and V2 are red and yellow, respectively (the lower end of each light-emitting diode is marked on the outside of the lower end of the inkjet printer body shell with text representing different nozzle positions); the pressure resistor RT is a miniature pressure resistor model BX120-30AA.

[0023] The above description illustrates the basic principles and main features of the present invention and its advantages. It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered as illustrative and non-restrictive in all respects. The scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be included within the present invention.

[0024] In addition, it should be understood that although this specification is described in terms of implementation methods, the implementation methods do not only include an independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An inkjet printer, comprising an inkjet printer body, a vibration motor, and a pressure resistor, characterized in that: The inkjet printer further comprises a time delay circuit, a high pressure prompt circuit, and a low pressure detection circuit. The time delay circuit, the high pressure prompt circuit, the low pressure detection circuit, and the pressure resistor are respectively provided with multiple channels and the number is the same as the number of the inkjet printer nozzles. Each nozzle is equipped with a time delay circuit, a high pressure prompt circuit, a low pressure detection circuit, and a pressure resistor. The inner side of the pipe connecting the nozzle and the nozzle of each inkjet printer body has mounting holes, and multiple pressure resistors are respectively installed in the multiple mounting holes. The vibration motor is installed at the outer end of the ink cartridge of the inkjet printer body, and the vibration motor, the time delay circuit, the high pressure prompt circuit, and the low pressure detection circuit are installed in the component box of the inkjet printer body. The signal output end of each time delay circuit is electrically connected to one end of each pressure resistor, and the other end of each pressure resistor is electrically connected to the signal input end of each high pressure prompt circuit and low pressure detection circuit. The multiple positive power output ends of the control circuit board of the inkjet printer body are electrically connected to the signal input end of the multiple time delay circuits. The power output end of the multiple time delay circuits is electrically connected to the signal input ends of the multiple high pressure prompt circuits and low pressure detection circuits.

2. An inkjet printer according to claim 1, characterized in that: The pressure resistor is equipped with a resistor, and one end of the resistor and the pressure resistor are electrically connected.

3. An inkjet printer according to claim 1, characterized in that: The delay circuit includes an electrically connected relay, a capacitor, a resistor, and a transistor. The collector of the transistor is connected to the negative pole of the relay, the positive power input terminal of the relay is connected to the control power input terminal, one end of the first resistor is connected to one end of the second resistor and the positive pole of the capacitor, the other end of the second resistor is connected to the base of the transistor, and the negative pole of the capacitor is connected to the emitter of the transistor.

4. An inkjet printer according to claim 1, characterized in that: The high pressure warning circuit includes an electrically connected resistor, a transistor, and a light-emitting diode. One end of the first resistor is connected to the positive electrode of the light-emitting diode, the collector of the transistor is connected to the negative electrode of the light-emitting diode, the base of the transistor is connected to one end of the second resistor and one end of the third resistor, and the other end of the third resistor is connected to the emitter of the transistor.

5. An inkjet printer according to claim 1, characterized in that: Each low pressure warning circuit includes an electrically connected resistor, a transistor, a light-emitting diode and a resistor, one end of the first resistor is connected to the positive electrode of the light-emitting diode, the collector of the first transistor is connected to the negative electrode of the light-emitting diode, the emitters of the first transistor and the second transistor are connected to one end of the second resistor, the other end of the second resistor is connected to one end of the third resistor and the base of the second transistor, one end of the fourth resistor is connected to the collector of the second transistor and the base of the first transistor, and the other end of the fourth resistor is connected to the other end of the first resistor.

6. An inkjet printer according to claim 1, characterized in that: The second resistor of the high pressure prompt circuit and the third resistor of the low pressure prompt circuit are adjustable resistors.

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