JPH08112898A - Ink jet printer - Google Patents

Abstract

PURPOSE: To provide an ink jet printer which can be characterized by stable ink discharge, high print quality, and compactness and light weight. CONSTITUTION: An ink jet printer which has a liquid channel to fill ink, a print head 2 having a discharge energy generator which generates energy to discharge ink, and a carriage 1 which moves the print head 2 having a part where ink flows in a direction not orthogonal to the direction of movement of the print head 2 at least in a part of the liquid channel onto a printing medium 18 wherein the discharge energy generator 15 discharges ink 7 onto the printing medium 18 from the print head 2. An acceleration pickup 21 which detects an acceleration applied to the carriage 1 and a control 22 which controls the intensity of energy generated by the discharge energy generator in accordance with an acceleration detected.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer which prints by ejecting ink.

[0002]

2. Description of the Related Art In recent years, as an output printing device for various office equipment, high printing quality, high resolution, low noise, and low cost have been achieved.
Moreover, a printer using an inkjet head has become the mainstream because it does not require a step of fixing the ink on a print medium, and can easily realize multi-color printing and color output.

A conventional ink jet printer will be described below with reference to FIGS. 14 to 20.

FIG. 14 shows a conventional ink jet printer P.
It is a block diagram which shows 1. In FIG. 14, 1 is a carriage, 2 is a print head held by the carriage, 3 is an ink tank held by the carriage 1, and 4 is the carriage 1.
A belt connected to the belt 5, a carriage shaft for holding the carriage 1, a motor 6 connected to the belt 4,
6 is a control unit to which a discharge energy generation unit 15 described later is connected, 17 is a chassis holding the carriage shaft 5,
Reference numeral 18 is a print medium, 19 is a paper feed roller that holds the print medium 18 so as to face the print head 2, LC indicates a movement range of the carriage 1, and LP indicates a print range.

FIG. 15 is a schematic sectional view showing the carriage 1, the print head 2 and the carriage shaft 5.

Further, FIG. 16 is a sectional view taken along line XX ′ in FIG. 15. In FIG. 16, 7 is the ink contained in the ink tank 3, 8 is the ink reservoir 10 of the print head 2 via the filter 9. An ink supply path communicating with the liquid path 11 and the nozzle 12. Therefore, the ink reservoir 10, the liquid path 11, and the nozzle 12 are filled with the ink 7. Reference numeral 13 is a nozzle plate, 14 is a substrate, and 15 is attached to the substrate 14, and is an ejection energy generation unit for giving energy for ejecting the ink 7 to the ink 7. This ejection energy generation unit 15 is the control unit as described above. It is connected to 16. Reference numeral 20 is a negative pressure generating portion for generating a negative pressure in the ink tank 3. Functions and the like of the inkjet printer having such a configuration will be described.

In FIG. 16, the ink 7 from the ink tank 3 is subjected to a capillary action, a pressure of a pump, and the like to supply an ink, a filter 9, an ink reservoir 10, a liquid passage 11, and a nozzle 12.
To be satisfied. Here, energy for ejecting the ink 7 is given to the ink 7 by transmitting a signal or the like from the control unit 16 to the ejection energy generating unit 15, so that the ink 7 is ejected from the nozzle 12 and the print medium 18 is ejected. Can be printed on. As the ejection energy generating unit 15, for example, a unit that generates boiling bubbles by Joule heat generated by energizing the conductive ink 7 and ejects ink by the pressure of the boiling bubbles is used. The negative pressure generator 20 generates a negative pressure on the ink 7 so that the ink 7 does not easily leak from the nozzle 12. The ink tank 3 and the print head 2 print on the print medium 18 while moving in parallel with the print medium 18 by the carriage 1. Further, the carriage 1 moves according to the movement of the belt 4 driven by the motor 6.

Next, the operation of the carriage 1 will be described in detail with reference to FIGS. When the carriage 1 prints while moving from part A to part D in FIG. 14,
The speed is zero in the A part, the speed is increased when moving from the A part to the B part, and after reaching a certain speed VS in the B part, the speed is moved to the C part at a substantially constant speed, The speed is reduced from the C part to the D part, and the speed becomes zero in the D part.

This state is shown in FIGS. As shown in FIG. 17, which is a graph showing the relationship between the position of the carriage 1 and the movement time, the position A of the first carriage 1 is the zero position, and the carriage 1 is moved as the movement time elapses.
The position of moves from B to C to D. In FIG. 17, the carriage 1 gradually approaches the B position while gradually rising, then approaches the C position on a straight line having a constant gradient, and further gradually descends toward the D position. The slope of the characteristic line in FIG. 17 represents the speed of the carriage 1, and the straight line section TS indicates that the speed of the carriage 1 is constant.

FIG. 18 is a graph showing the relationship between the speed of the carriage 1 and the position of the carriage 1. The speed of the carriage 1 gradually increases between AB, the speed is constant between BC, and the speed between CD is high. At, the speed decreases gradually.

FIG. 19 is a graph showing the relationship between the acceleration of the carriage 1 and the position of the carriage 1. The acceleration is a positive constant value and the constant speed BC is constant between AB of increasing speed.
The acceleration is zero during the interval, and the acceleration is a negative constant value during the CD where the speed decreases.

[0012]

However, in the above-mentioned conventional structure, acceleration is generated in the carriage 1 as shown in FIG. 19, and the carriage 1 is moved in at least a part of the liquid passage 11 and the nozzle 12 shown in FIG. When there is a portion where the ink 7 flows in a direction that is not orthogonal to, a positive or negative acceleration is applied to the ink 7 in a direction that is not orthogonal to the flow direction between the portions A to B and the portions C to D where acceleration occurs. The ink 7 in the liquid path 11
Kinetic energy in the direction of flow changes. Therefore, when the ejection energy generation unit 15 generates a certain amount of energy to eject the ink 7 from the nozzle 12, the ink 7 is ejected from the nozzle 12 between the portion A and the portion B or between the portion C and the portion D. By the time the ink is ejected, the total sum of the kinetic energy for ejecting the ink 7 is different from the total sum of the kinetic energy for ejecting the ink 7 between the portion B and the portion C, and the change in the ejection speed, Disturbances in ejection such as changes in the amount of ejected ink and occurrence of mist ejection have occurred, resulting in defective printing. In order to avoid this, if printing is not performed between the A section and the B section and between the C section and the D section, there is a problem that it becomes difficult to downsize the apparatus. Further, as shown in the state diagram of FIG. 20, when the installation direction of the inkjet printer P1 changes variously, the head pressure of the ink 7 changes due to the attitude difference of the ink tank 3, the liquid passage 11 (see FIG. 16) and the like. When the pressure in the liquid passage 11 changes and the ejection energy generation unit 15 generates a certain amount of energy, the total kinetic energy related to the ejection of the ink 7 is finally determined before the ink 7 is ejected from the nozzle 12. It changes according to the change in the above head pressure,
There is a problem in that a discharge defect such as a change in discharge speed, a change in the amount of discharged ink, and the occurrence of mist-spraying occurs, resulting in defective printing. Further, as shown in FIG. 16, when the negative pressure generating portion 20 exists in the ink tank 3 so that the ink 7 does not easily leak from the nozzle 12, fluctuations in the amount of the ink 7, environmental temperature, atmospheric pressure, etc. Due to this, the magnitude of the negative pressure applied to the ink 7 may change. At this time, when the ejection energy generation unit 15 generates a constant energy, the total sum of kinetic energy involved in the ejection of the ink 7 finally changes according to the change of the negative pressure before the ink 7 is ejected from the nozzle 12. However, there is a problem in that the ejection speed changes, the amount of the ejected ink changes, and the ejection disturbance such as the occurrence of mist ejection occurs, which causes the disturbance of the printing.

An object of the present invention is to solve the above-mentioned conventional problems, and an object thereof is to provide an ink jet printer in which ink ejection is stable, printing is good, and the size and weight are small.

[0014]

In order to achieve this object, an ink jet printer according to claim 1 of the present invention comprises:
A print head having a liquid path for filling the ink and an ejection energy generating section for generating energy for ejecting the ink, and an ink flowing section in at least a part of the liquid path in a direction not orthogonal to the moving direction of the print head. An inkjet printer that has a carriage that moves a print head onto a print medium, and that ejects ink from the print head onto the print medium by an ejection energy generation unit, and an acceleration detection unit that detects acceleration applied to the carriage, And a control unit that controls the magnitude of energy generated by the ejection energy generation unit according to the value of the acceleration.

An ink jet printer according to a second aspect of the present invention includes a print head having a liquid path for filling the ink and a discharge energy generating section for generating energy for discharging the ink, and the print head is moved onto a print medium. An ink jet printer having a carriage and ejecting ink from a print head onto a print medium by a discharge energy generation unit, wherein a tilt detection unit that detects the tilt of the print head and a value of the tilt of the detected print head are used. And a control unit that controls the magnitude of the energy generated by the discharge energy generation unit.

An ink jet printer according to a third aspect of the present invention has a print head having a liquid path for filling the ink and an ejection energy generating section for generating energy for ejecting the ink, and the ink is ejected by the ejection energy generating section. An inkjet printer that discharges ink from a print head onto a print medium, the negative pressure detecting unit detecting a negative pressure generated in an ink containing unit for containing ink to be supplied to the print head, and the magnitude of the detected negative pressure. And a control unit that controls the magnitude of the energy generated by the ejection energy generation unit according to the above.

According to a fourth aspect of the present invention, there is provided an ink jet printer according to any one of the first to third aspects, in which the ejection energy generating portion is any one of electrodes for supplying a current to a heating element, a piezoelectric element or ink. Consists of.

Here, an acceleration pickup, a rotary encoder for acceleration detection, a linear encoder for acceleration detection, or the like can be used as the acceleration detection unit, and by this, the movement related to the final ejection of ink by the time the ink is ejected from the nozzle. The total energy can be kept constant.

[0019]

With this configuration, even if the kinetic energy in the liquid path of the ink changes due to the change in the acceleration of the carriage, it is possible to make the total sum of the kinetic energy related to the ink discharge constant. There is no fluctuation in discharge such as change in volume and occurrence of spray spray,
Good printing is possible, and since ink can be ejected even in the acceleration generation region, the device can be downsized. Further, even if the kinetic energy in the ink liquid path changes due to a change in the inclination of the print head or a negative pressure change in the ink containing portion, the sum of the kinetic energy related to ink ejection can be made constant. It is possible to perform good printing without any disturbance in ejection such as change, change in ejected ink amount, and occurrence of spray ejection. Further, the ejection energy generating portion including the heating element, the piezoelectric element, or the electrode for supplying a current to the ink can easily control the amount of the generated energy.

[0020]

【Example】

(Embodiment 1) A first embodiment of the present invention will be described below with reference to FIG.
~ It demonstrates, referring FIG. 5 and FIG.

FIG. 1 is a block diagram showing an ink jet printer P2 according to the first embodiment of the present invention. In FIG. 1, the same or corresponding parts as those in FIG. 14 are designated by the same reference numerals, and the description thereof will be omitted. In FIG. 1, reference numeral 21 is an acceleration pickup as an acceleration detection unit provided on the carriage 1, and 22 is a control unit. The carriage 1 of FIG. 1 has the same structure as the conventional carriage shown in FIG. 16, and the ejection energy generation unit 15 and the acceleration pickup 21 of the print head 2 are connected to a control unit 22.

In the ink jet printer P2 having such a structure, at least a part of the liquid path 11 and the nozzle 12 is a part where the ink 7 flows in a direction not orthogonal to the moving direction of the carriage 1.

Next, the ink jet printer P2 shown in FIG.
The operation of will be described. By transmitting a signal or the like from the control unit 22 to the ejection energy generation unit 15, the energy for ejecting the ink 7 is given to the ink 7, and the ink 7 is ejected from the nozzle 12 to print on the print medium 18. Is possible.

In the negative pressure generating section 20 of FIG. 16, a negative pressure is generated in the ink 7 so that the ink does not easily leak from the nozzle 12. Further, the ink tank 3 and the print head 2 as the ink storage portion are moved by the carriage 1 so as to be parallel to the print medium 18,
Printing is performed on the print medium 18.

The carriage 1 moving along the carriage shaft 5 is subjected to acceleration and deceleration before the movement starts and before the movement stops, and the ink 7 in the liquid path 11 is not orthogonal to the carriage movement direction. In the flowing portion, the kinetic energy of the ink 7 relating to the ejection of the ink 7 changes. The acceleration applied to the moving carriage 1 is detected by the acceleration pickup 21.

Here, the amount of energy generated by the ejection energy generation unit 15 is the amount of energy generated by the ejection energy generation unit 15 and the acceleration of the carriage 1 in order to keep the total sum of the kinetic energy of the ink 7 relating to ejection constant. Is determined using an equation showing the relationship between the magnitude of the energy generated by the ejection energy generation unit 15 and the acceleration of the carriage 1 and the acceleration data detected by the acceleration pickup 21. An example of the above graph is shown in FIG. As shown in FIG. 2, when the acceleration of the carriage 1 increases, the amount of energy generated in the ejection energy generating unit 15 decreases, and conversely, when the acceleration decreases, the amount of energy increases.
For example, when the negative acceleration w1 is generated, the energy generated by the ejection energy generation unit 15 is larger than that when the acceleration is zero by ΔE1, and when the positive acceleration w2 is generated, the generated energy is smaller than that when the acceleration is zero by ΔE2. This allows ink 7
The total sum of the kinetic energy related to the ejection of the ink is made constant when the ink 7 is ejected.

FIG. 3 is a flow chart showing the operation of the controller 22 in the first embodiment of the present invention.

First, the acceleration data of the carriage 1 detected by the acceleration pickup 21 is read (step S1), and the amount of energy generated in the ejection energy generating section 15 is calculated based on this data (step S2). The calculated energy is generated from the ejection energy generator 15 (step S3).

As described above, according to the ink jet printer P2 of the present embodiment, by controlling the magnitude of the energy generated by the ejection energy generating section 15 according to the value of the acceleration applied to the carriage 1, the liquid of the ink 7 is discharged. Road 11
Even if the kinetic energy in the inside changes due to the change in acceleration, the total sum of the kinetic energy related to the ejection of the ink 7 becomes constant, and there is no disturbance in ejection such as a change in ejection speed, a change in ejected ink amount, and the occurrence of mist blow ejection. Good printing is possible, and since ink can be ejected even in the acceleration generation region, the device can be downsized.

Although the acceleration pickup 21 is shown as the acceleration detector in the above embodiment, the rotary encoder 24 for detecting the acceleration of the carriage 1 is provided on the rotary shaft 23 of the belt 4 as shown in FIG. It can also be used as an acceleration detector. Further, as shown in FIG. 5, a linear scale 25 may be provided in the moving direction of the carriage 1, and a linear encoder 26 for detecting the acceleration of the carriage 1 may be provided corresponding to the linear scale 25, and this may be used as an acceleration detection unit.

(Second Embodiment) An ink jet printer according to a second embodiment of the present invention will be described below with reference to FIGS.
And it demonstrates using FIG.

FIG. 6 is a block diagram showing an ink jet printer P2 according to the second embodiment of the present invention. In FIG. 6, the same or corresponding portions as those in FIG. 1 are designated by the same reference numerals, and 27 is provided on the carriage 1 as shown in the partially enlarged view of FIG. 7, and is a gyro or the like for detecting the inclination of the carriage 1. The tilt detector 28 is a controller. In this embodiment, the chassis 17 and the inkjet printer P2 can be installed with an inclination with respect to the gravity direction G shown in FIG. The carriage 1 and the print head 2 in FIG. 6 have the same configuration as the conventional carriage and print head shown in FIG. 16, and the ejection energy generation unit 15 and the inclination detection unit 27 of the print head 2 are connected to the control unit 28. .

In such a configuration, when the installation direction of the ink jet printer P2 changes variously, the liquid path 1
When the magnitude of gravity applied to the flow direction of the ink 7 in 1 changes and the ejection energy generation unit 15 generates a constant energy, the ink 7 is finally ejected by the time the ink 7 is ejected from the nozzle 12. The total sum of kinetic energies related to changes in the ejection speed, changes in the ejection speed, changes in the amount of ejected ink, and disturbances in ejection such as the occurrence of atomized ejection, resulting in defective printing.

Therefore, the inclination of the print head 2 is detected by the inclination detecting section 27, and the control section 28 determines the amount of energy generated by the ejection energy generating section 15 according to the detected inclination value of the print head 2. Control.

Here, the amount of energy generated by the ejection energy generator 15 is equal to the amount of energy generated by the ejection energy generator 15 and the print head 2 in order to keep the total kinetic energy of the ink 7 relating to ejection constant.
Is determined by using a graph showing the relationship between the inclination of the print head 2 and an equation showing the relationship between the amount of energy generated by the ejection energy generator 15 and the inclination of the print head 2 and the inclination data detected by the inclination detector 27.

An example of the above graph is shown in FIG. As shown in FIG. 8, as the tilt angle of the carriage 1 increases, the amount of energy generated by the ejection energy generating unit 15 also increases. For example, the generated energy at the tilt angle θ is larger by ΔE than when the tilt angle is zero. As a result, the total sum of the kinetic energies of the ink 7 relating to the ejection is made constant during the ejection of the ink 7.

FIG. 9 is a flow chart showing the operation of the control unit 28. First, the tilt data of the print head 2 detected by the tilt detection unit 27 is read (step S1).
1), based on this data, the ejection energy generation unit 15
Calculate the amount of energy generated in (step S
12) Then, the calculated energy is generated from the ejection energy generating unit 15 (step S13).

As described above, according to the ink jet printer P2 of this embodiment, by the time the ink 7 is ejected from the nozzle 12, the total kinetic energy related to the ejection of the ink 7 is finally controlled to be constant. As a result, it is possible to perform good printing without the disturbance of the ejection such as the change of the ejection speed, the change of the ejected ink amount, and the occurrence of the mist ejection.

(Embodiment 3) An ink jet printer according to a third embodiment of the present invention will be described below with reference to FIGS.

FIG. 10 is a block diagram showing an ink jet printer P2 in the third embodiment of the present invention. Figure 10
In FIG. 1, the same or corresponding parts as those in FIG. 1 are designated by the same reference numerals, and 29 is a control unit.

FIG. 11 shows YY of the carriage 1 of FIG.
It is a cross-sectional view taken along the line. In FIG. 11, reference numeral 30 is a negative pressure detection unit that is provided in the ink supply path 8 and detects the negative pressure of the ink tank 3. The negative pressure detector 30 and the discharge energy generator 15 are connected to the controller 29.

In such a structure, as shown in FIG. 11, when the negative pressure generating section 20 exists in the ink tank (ink containing section) 3 so that the ink 7 does not easily leak from the nozzle 12, the ink 7 The magnitude of the negative pressure applied to the ink 7 may change due to fluctuations in the amount of ink, environmental temperature, atmospheric pressure, and the like. At this time, the magnitude of the negative pressure of the ink in the ink tank 3 is detected using the negative pressure detector 30.
Then, the control unit 29 determines the amount of energy generated by the ejection energy generation unit 15 according to the value of the negative pressure of the ink 7.
Control using.

Here, the amount of energy generated by the ejection energy generation unit 15 is the energy generated by the ejection energy generation unit 15 in order to make the total sum of the kinetic energies of the ink 7 relating to ejection constant. It is determined using a graph showing the relationship between the magnitude of the negative pressure of the ink 7 or the equation of the relationship between the magnitude of the energy generated by the ejection energy generating unit 15 and the negative pressure of the ink 7 and the negative pressure detecting unit 30. .

An example of the above graph is shown in FIG. FIG.
As shown in, when the negative pressure of the ink 7 increases, the amount of energy generated by the ejection energy generating unit 15 also increases. For example, when the negative pressure is p, the generated energy is increased by ΔE as compared with the case where the negative pressure is zero.
As a result, the total sum of the kinetic energies of the ink 7 relating to the ejection is made constant during the ejection of the ink 7.

FIG. 13 is a flow chart showing the operation of the control unit 29 in the third embodiment of the present invention.

First, the negative pressure data of the ink 7 detected by the negative pressure detector 30 is read (step S2).
1), based on this data, the ejection energy generation unit 15
Calculate the amount of energy generated in (step S
22), the calculated energy is generated from the ejection energy generation unit 15 (step S23).

As described above, according to the ink jet printer P2 of this embodiment, by the time the ink 7 is ejected from the nozzle 12, the total kinetic energy related to the ejection of the ink 7 is finally controlled to be constant. As a result, it is possible to perform good printing without the disturbance of the ejection such as the change of the ejection speed, the change of the ejected ink amount, and the occurrence of the mist ejection.

The ejection energy generating section 15 in each of the above-described embodiments generates boiling bubbles by Joule heat generated by energizing the conductive ink 7 through a pair of electrodes, and the pressure of the boiling bubbles causes the ink to flow. 7 ejecting the ink, generating a boiling bubble in the ink 7 by heat generation of the resistor due to energization and ejecting the ink 7 by the pressure of the boiling bubble, and ejecting the ink 7 by the pressure of the deformation of the piezoelectric element. With these, the magnitude of the generated energy can be easily controlled.

[0049]

As described above, the present invention controls the magnitude of the energy generated by the ejection energy generating section according to the acceleration detecting section for detecting the acceleration applied to the carriage and the detected acceleration value. By providing the control unit, it is possible to make the total sum of kinetic energy related to ink ejection constant, so that there is no disturbance in ejection such as change in ejection speed, change in ejected ink amount, and occurrence of mist blow ejection. Since printing is possible and ink can be ejected even in the acceleration generation region, it is possible to realize an inkjet printer that can be downsized.

Further, there is provided a tilt detecting section for detecting the tilt of the print head, and a control section for controlling the magnitude of energy generated by the ejection energy generating section according to the detected tilt value of the print head. As a result, since the total sum of kinetic energy related to ink ejection can be made constant, it is possible to perform favorable printing without disturbance of ejection such as change of ejection speed, change of ejected ink amount, occurrence of mist blow ejection, and the like. An inkjet printer can be realized.

Further, a negative pressure detecting section for detecting a negative pressure generated in an ink containing section for containing ink to be supplied to the print head, and the ejection energy generating section according to the magnitude of the detected negative pressure. By providing a control unit for controlling the amount of energy generated by, it is possible to make the total sum of kinetic energy related to ink ejection constant, so that the change in ejection speed, the change in ejected ink amount, and the occurrence of atomized ejection It is possible to realize an ink jet printer that can perform good printing without irregularity in ejection. Further, since the ejection energy generating section is composed of any one of a heating element and a piezoelectric element or an electrode for supplying a current to the ink, it is possible to realize an ink jet printer in which the amount of energy generation can be easily controlled.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an inkjet printer according to a first embodiment of the present invention.

FIG. 2 is a graph showing the relationship between the amount of energy generated in the ejection energy generating unit and the acceleration of the carriage in the first embodiment of the present invention.

FIG. 3 is a flowchart showing the operation of the control unit in the first embodiment of the present invention.

FIG. 4 is a configuration diagram showing a modified example of the inkjet printer according to the first embodiment of the present invention.

FIG. 5 is a configuration diagram showing another modification of the inkjet printer according to the first embodiment of the present invention.

FIG. 6 is a configuration diagram showing an inkjet printer according to a second embodiment of the present invention.

FIG. 7 is a partially enlarged view of an inkjet printer according to a second embodiment of the present invention.

FIG. 8 is a graph showing the relationship between the amount of energy generated in the ejection energy generating section and the inclination angle of the carriage in the second embodiment of the present invention.

FIG. 9 is a flowchart showing the operation of the control unit in the second embodiment of the present invention.

FIG. 10 is a configuration diagram showing an inkjet printer according to a third embodiment of the present invention.

11 is a sectional view taken along the line YY ′ of FIG.

FIG. 12 is a graph showing the relationship between the amount of energy generated in the ejection energy generator and the ink negative pressure in the third embodiment of the present invention.

FIG. 13 is a flowchart showing the operation of the control unit in the third embodiment of the present invention.

FIG. 14 is a configuration diagram showing a conventional inkjet printer.

FIG. 15 is a schematic cross-sectional view showing a carriage, a print head, and a carriage shaft that constitute a conventional inkjet printer.

16 is a sectional view taken along line XX ′ of FIG.

FIG. 17 is a graph showing the relationship between the position of the carriage and the moving time.

FIG. 18 is a graph showing the relationship between carriage speed and carriage position.

FIG. 19 is a graph showing the relationship between the acceleration of the carriage and the position of the carriage.

FIG. 20 is a state diagram showing an installed state of the inkjet printer.

[Explanation of symbols]

 1 Carriage 2 Print Head 3 Ink Tank (Ink Storage Section) 4 Belt 5 Carriage Shaft 6 Motor 7 Ink 8 Ink Supply Path 9 Filter 10 Ink Reservoir 11 Liquid Path 12 Nozzle 13 Nozzle Plate 14 Substrate 15 Discharge Energy Generation Section 16 Control Section 17 Chassis 18 Print medium 19 Paper feed roller 20 Negative pressure generation unit 21 Accelerometer (acceleration detection unit) 22 Control unit 23 Rotation axis 24 Rotary encoder 25 Linear scale 26 Linear encoder 27 Inclination detection unit 28 Control unit 29 Control unit 30 Negative pressure detection Department

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI technical display location B41J 3/04 104 F

Claims (4)

[Claims] 1. A print head having a liquid path for filling ink and an ejection energy generating section for generating energy for ejecting the ink, and at least a part of the liquid path is not orthogonal to a moving direction of the print head. An inkjet printer that has a carriage that moves the print head having a portion in which the ink flows in a direction onto a print medium, and that discharges the ink from the print head onto the print medium by the discharge energy generation unit. ,
An acceleration detection unit that detects an acceleration applied to the carriage, and a control unit that controls the magnitude of energy generated by the ejection energy generation unit according to the value of the acceleration detected by the acceleration detection unit. Characteristic inkjet printer. 2. A print head having a liquid path for filling ink and a discharge energy generating section for generating energy for discharging the ink, and a carriage for moving the print head onto a print medium, An ink jet printer that ejects the ink from the print head onto the print medium by an ejection energy generation unit, the tilt detection unit detecting an inclination of the print head, and the inclination value of the detected print head. And a control unit that controls the amount of energy generated by the ejection energy generation unit. 3. A print head having a liquid path for filling ink and an ejection energy generating section for generating energy for ejecting the ink, wherein the ink is ejected from the print head by the ejection energy generating section. An inkjet printer that ejects onto a print medium, the negative pressure detecting unit detecting a negative pressure generated in an ink containing unit for containing ink to be supplied to the print head, and the magnitude of the detected negative pressure. And a controller for controlling the amount of energy generated by the ejection energy generator according to the above. 4. The ejection energy generating section is formed of any one of a heating element, a piezoelectric element, and an electrode for supplying an electric current to the ink. The inkjet printer described in 1.