JPH0441242A - Ink jet recorder - Google Patents

Abstract

PURPOSE:To enable a high precise image to be recorded without increasing discharge energy by a method wherein a gap regulating means which regulates a distance between a recording head and a medium to be recorded according to a recording mode, is provided. CONSTITUTION:As a distance between a head and paper is being decreased from an ordinary 0.3mm gap setting value (a), a dot diameter is suddenly decreased by taking a distance of (l) as a border line. Though the distance (l) varies according to a structure of a recording head and composition of ink, it is approximately 1 to 5 times a diameter of a droplet. A gap regulation means screw two gap regulation screws 5021, 5022 which knock against a block 102 outside a recording sheet 107 into a back platen, and rotates respective gap regulation screws 5021, 5022 with two motors 5011, 5012 to vary a clearance between the back platen 105 and the block 102, i.e., a clearance between the recording sheet 107 and a recording head 101. Respective motors 5011, 5012 are driven with a drive circuit which controls recording operation. The diameter of the recording dot can be decreased, and a high precise image can be recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an inkjet recording device, and particularly to an inkjet recording device using a recording head that ejects ink using thermal energy.

[Prior Art] Conventionally, when attempting to obtain minute dots to form highly detailed images in an inkjet recording device using a recording head that ejects ink using thermal energy, a recording head with small nozzle dimensions is used. was used to record.

For example, to obtain a spherical droplet with a diameter of 30 μm, the nozzle dimensions should be 20H x 30W x 500L (μ
I had to keep it to about 11). In order to further increase the precision and obtain a spherical droplet with a diameter of 15μI, the nozzle dimensions should be IOH x 15W x 2501 (
μm). Formation of such fine nozzles is performed by a method using etching as disclosed in JP-A No. 62-253457, or in this case, the nozzle dimensions may vary due to variations in the forming conditions when the nozzle wall is formed. It falls apart.

[Problems to be Solved by the Invention] The conventional inkjet recording apparatus described above uses a recording head with a small nozzle size in order to obtain minute dots, but the nozzle size may vary during formation. there were. When the nozzle width variation is 30±1 μm and when it is 15±1 μm, the effect of the nozzle width on the formed dot diameter is greater in the latter case. But then,
The latter method has the disadvantage that the required tolerance for the nozzle width, which is determined by the allowable value of the dot diameter variation, is stricter than the latter method, requiring denser manufacturing and increasing manufacturing costs. Also,
Since the nozzle is small, there is a drawback that the resistance of the pipe line due to the nozzle increases and the energy required for discharge also increases.

The present invention has been made in view of the drawbacks of the prior art described above, and provides an inkjet recording device that is easy to manufacture and capable of recording high-definition images without increasing the required ejection energy. The purpose is to

[Means for Solving the Problems] An inkjet recording device of the present invention is an inkjet recording device that performs recording on a recording medium by ejecting a recording liquid from a recording head, in which the recording head and the recording medium are adjusted according to the recording mode. It has a gap adjustment means for adjusting the distance to the medium.

In this case, when the recording mode is a mode for forming minute dots, the gap adjustment means adjusts the distance between the recording head and the recording medium to 5 times or less the diameter of the droplet of the recording liquid discharged from the recording head. It may be adjusted to

[Operation: The diameter of the dots recorded on the recording medium varies depending on the distance between the recording head and the recording medium. This is because the recording liquid ejected from the recording head during ejection collides with the recording medium before the recording liquid forms droplets. Since energy is consumed by this collision, the amount of recording liquid that adheres to the recording medium decreases, and the dot diameter also decreases.

The distance at which the recording liquid forms a droplet is
Since the diameter of the droplet is approximately five times or less than the diameter of the droplet that is originally formed, recording with minute dots can be performed by separating the recording head and the recording medium to this extent.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic side view showing an embodiment of an ink jet recording apparatus according to the present invention.

In FIG. 1, ]01Bk, ]01y, 101n, 1
Reference numeral 01c denotes a bubble sheet type recording head corresponding to ink colors of black, yellow, macenter, and cyan, respectively, which are combined to form the recording head 101. These are 4736 at a density of 400 dpi
It uses a heating resistor as a built-in ejection energy generator, and uses the air bubbles generated in the ink when electricity is applied as a pressure source to eject ink droplets from the ejection ports. It is fixed to block 102.

Reference numeral 103 is a capping unit, and when the block +02 is not recorded such as during standby, the capping unit 10 is
3 facing each other and cap them. The capping unit 103 also includes a recovery pump (not shown) during circulation recovery.
The tray serves as a receptacle for waste ink sent from the ink supply system and pushed out from the ejection port. The waste ink is led to a waste ink tank (not shown).

104 is the recording head l018, 101y, 1011I
+, 101c are arranged facing each other at a predetermined interval, and are used to convey the recording sheet. Reference numeral 105 is a back platen, which is arranged opposite to each recording head via the charging adsorption belt 104. be.

Reference numeral 106 designates a paper feed cassette that stores recording sheets 107 such as plain paper and is detachably attached to the main body of the apparatus, and reference numeral 108 designates a pickup roller that feeds and feeds only the top recording sheet 107.

109 is a conveyance roller that conveys the recording sheet 107 sent out from the pickup roller 108 to the conveyance path 110, and 111 is a conveyance roller disposed on the exit side of the conveyance path 110.

113 and 114 are heaters and fans that dry and fix ink droplets attached to the recording sheet 107 by hot air; 115 is the recording sheet 10 after fixing;
A discharge roller 11B discharges the recording sheets 107 from the apparatus, and a tray 11B sequentially stocks the discharged recording sheets 107.

In addition, although not shown in FIG.
A gap adjustment means is provided for adjusting the distance between the recording sheet 107 and the recording sheet 107.

Next, the operation of the embodiment with the above configuration will be explained.

First, the recording operation will be explained. When an operation to start recording is performed, a recording sheet 107 of a specified size is sent out from the paper feed cassette 106 by a pickup roller 108. The fed recording sheet 107 is rotated in a pre-charged state by a conveyance roller 109 and a conveyance roller 111, and is placed on a charging adsorption belt 104 which is flattened by a back platen 105. The leading end of the recording sheet 107 is the recording head 10
1c, lol.

10] Y, 1018, a drive circuit (not shown) drives the energy generator of each recording head in accordance with the image data. With this drive,
Ink droplets corresponding to the image information are ejected from the ejection port onto the recording sheet 1.
07 and recording is performed.

If the recording sheet 107 has poor hygroscopicity, the droplets adhering to the surface will not dry and will be rubbed, causing print stains, so the heater 113 and fan 114 are used to forcefully dry the print and fix it. Recording sheet 10 that has been fixed
7 is discharged onto the tray 116 by the discharge roller 115.

As mentioned above, cyan, magenta, yellow,
A color image is formed by applying a recording signal corresponding to each recording head corresponding to black ink.

Next, the ejection principle of the inkjet recording spatula I''101 used in the apparatus of this embodiment will be explained.

A recording head applied to an inkjet recording device generally includes a fine liquid ejection opening (orifice), a liquid flow path, and an energy application section provided in a part of the liquid flow path.
It is provided with energy generating means for generating droplet forming energy to act on the liquid in the acting section.

Energy generating means for generating such energy include recording methods using electromechanical transducers such as piezo elements, irradiating electromagnetic waves such as lasers, causing the liquid to absorb them and generate heat, and the effect of the heat generation. There are recording methods that use energy generating means to eject and fly droplets, and recording methods that use energy generating means that heats the liquid with an electrothermal converter and ejects the liquid.

Among these, the recording head used in the inkjet recording method that discharges liquid using thermal energy has a high density array of liquid discharge ports (orifices) for discharging recording droplets to form flying droplets. This makes it possible to record with high resolution. In addition, a recording head that uses an electrothermal converter as an energy generating means can easily be made more compact as a whole.
In addition, it is possible to fully utilize the advantages of IC technology and micro-processing technology, which are likely due to the recent technological advances and reliability improvements in the semiconductor field, and it is easy to lengthen and planarize (two-dimensional). For this reason, it is possible to provide an inkjet recording head that can easily be multi-nozzled/highly packaged, can be mass-produced with good productivity, and is inexpensive to manufacture.

In this way, using an electrothermal converter as an energy generation means,
Inkjet recording heads manufactured through a semiconductor manufacturing process generally have a liquid flow path corresponding to each orifice, and apply thermal energy to the liquid filling the liquid flow path for each liquid flow path. An electrothermal converter is provided as a means for discharging liquid from an orifice to form flying droplets, and each liquid flow path is supplied with liquid from a common liquid chamber communicating with each liquid flow path. It has a structure that allows

FIG. 2 is a schematic diagram of the inkjet recording head 101 described above, showing the electrothermal converter 203, electrode 204, and nozzle wall formed on a substrate 202 through semiconductor manufacturing process steps such as etching, vapor deposition, and sputtering. 2o
5. It consists of a top plate 206. Recording liquid 212
is supplied into the common liquid chamber 208 of the recording head 101 from a liquid storage chamber (not shown) through a liquid supply pipe 207. In the figure, 209 is a liquid supply pipe connector. The liquid 212 supplied into the common liquid chamber 208 is supplied into the nozzle 210 by capillary action, and is stably held by forming a meniscus at the orifice surface at the tip of the nozzle. By supplying electricity to the electrothermal converter 203, the liquid on the surface of the electrothermal converter is heated, a bubbling phenomenon occurs, and droplets are ejected from the orifice surface 211 due to the energy of the bubbling. With the configuration described above, the nozzle density is 40
A multi-nozzle inkjet recording head is formed with high-density nozzle piping such as 0 dpi.

FIG. 3 shows this multi-nozzle elongated recording head and ink supply means. In this figure, 10
1 is the recording head shown in FIG. 1, and 302 is the recording head 1.
A common liquid chamber 303 in 01 is an ejection opening (orifice) for ejecting liquid arranged on a recording liquid ejection surface 304. The ejection ports 303 shown in this figure are arranged in number to cover the recordable width of the target recording material. By selectively driving the elements, recording liquid can be ejected, and recording can be performed without main scanning of the head itself.

305 is a recording liquid supply tank for supplying recording liquid to the recording head 101; 306 is a main tank for replenishing recording liquid to the recording liquid supply tank 305;
The recording liquid is supplied from the main tank 306 to the common liquid chamber 302 of the recording head 301 through a supply pipe 307, and when replenishing the recording liquid, the recording liquid is supplied from the main tank 306 via a one-way replenishment rectifier valve 308 and a recovery pump 309. tank 30
5, the recording liquid can be replenished.

310 is a one-way recovery rectifier valve used during a recovery operation to recover the ejection function of the recording head 101;
311 is a circulation pipe in which a recovery rectifier valve 310 is installed;
Furthermore, 312 is a solenoid valve interposed in the first supply pipe 307 mentioned above, and 313 is an air vent valve for the supply tank.

In the recording head 101 and its recording liquid supply system and recovery system configured in this way, during recording,
The solenoid valve 312 is kept open and the supply tank 3
05, the recording liquid is replenished into the common liquid chamber 302 by its own weight, and is guided from the common liquid chamber 302 to the orifice 303 via a liquid path (not shown).

In addition, during a recovery operation performed to remove air bubbles remaining in the common liquid chamber 302 and the supply system and to cool the recording head +01, the recovery pump 309 is driven to supply the recording liquid to the common liquid chamber 302 through the circulation pipe 311. At the same time, the recording head is driven to push out air bubbles together with the ink from the orifice, and the recording liquid is returned from the common liquid chamber 302 to the supply tank 305 through the first supply pipe 307 and circulated.

Furthermore, at the time of initial filling of the liquid path, etc., with the solenoid valve 312 closed, the pump 309 pumps the recording liquid through the circulation pipe 3]1 into the common liquid chamber 302, and as the bubbles are discharged, the recording liquid is transferred to the orifice 303. It can be discharged from

Conventionally, in order to reduce landing errors, an apparatus has been proposed that has a means for maintaining the distance between the recording head and the recording medium at approximately 0.3 to 0.4 mm. (For example, as described in Japanese Patent Application Laid-Open No. 61-280941-@ by the present applicant) We investigated the relationship between the head-paper distance and the dot diameter after the ejected droplet lands on a recording sheet such as paper. We focused on

FIG. 4 shows the relationship between the distance between the head (recording head) and paper (recording sheet) and the diameter of the recorded dots. Normal 0.
The gap setting value of 3111 m is indicated by a. As the distance between the heads and the paper is reduced from here, the dot diameter suddenly becomes smaller after the distance k. This distance @IL varies depending on the structure of the recording head and the composition of the ink, but it is approximately 1 of the droplet diameter.
It is about 5 times to 5 times.

FIG. 5 is a diagram showing the configuration of the gap adjusting means in this embodiment.

The means for changing the gap, shown in the lower part of FIG. 1, are two gap adjusting screws 502. ．． 5022 to the back platen, and connect the two motors 501. ．． At 5012, each gap adjustment screw 502. , 502□ to change the distance between the back platen 105 and block +02, that is, the distance between the recording sheet 107 and the recording head 101. The means for changing the gap is not limited to this, but a stop pin whose length can be changed may be provided from the block 102 side, or a mechanism for sliding the position of the block 102 and the recording head 101 (for example, a rack and pinion gear) may be used. (by motor) may be provided. Note that each of the motors 5011 and 5012 is driven by a drive circuit that controls the recording operation.

The above-mentioned drive circuit operates the recording head 101 and the recording sheet 107 according to each mode set by a manual device (not shown).
Adjust the distance. For example, when the minute dot diameter forming mode is selected, which indicates recording with a minute dot diameter, the head-to-paper distance is set to a value smaller than the above-mentioned distance l (for example, b). The dot diameter Db in case b was less than half of the dot diameter Da in case a.

The principle that the dot diameter decreases in steps as the head-to-paper distance is decreased will be explained with reference to FIGS. 6 and 7.

In Figures 6(a) to 6(g), the head-to-paper distance is a.
(See FIG. 4) is a diagram showing the ejection operation step by step, and is in the normal recording mode. FIGS. 7(a) to 7(g) are diagrams showing step-by-step the ejection operation when the minute dot diameter forming mode is set and the head-to-paper distance is b (see FIG. 4). As shown in FIG. 6(a), the recording liquid (ink) 212 directly above the electrothermal transducer (heater) 203 in the nozzle is instantaneously heated to 300°C to 400°C by the pulse drive of the heater, and - [See Figure 6(b)]. Subsequently, at the stage shown in FIG. 6(C), the heater drive is stopped, but the bubbles expand adiabatically, reaching a maximum in FIG. 6(d). The recording liquid 212 is subjected to a force in the direction of advancing toward the recording sheet 107 due to inertial force, and the bubbles change from the state shown in FIG. 6(d) to the state shown in FIG. 6(e) as they shrink. The droplet 601 as shown in FIG. 6(f) overcomes the surface tension of the ink.
form. The droplet 601 discharged in FIG. 6(f) is a recording sheet! It lands on 17. When this bullet hits,
Droplet 601 spreads, recording sheet 1Ojl
- to form dots as shown in FIG. 6(g).

In FIG. 6(g), the shaded area is the recording sheet 107.
This figure shows the portion into which the recording liquid 212 permeates. At this time, the head-to-paper distance is a and the dot diameter is Da.

On the other hand, in the case of the head-to-paper distance b, the distance becomes as shown in FIGS. 7(a) to 7(g).

Figures 7(a) to 7(C) are similar to Figures 6(a) to 6.
It shows similar driving, similar bubbling, and similar ink flow to that shown in Figure (c). In the subsequent step shown in FIG. 6(d), the recording liquid 212 collides with the recording sheet 107 before forming droplets, and the kinetic energy of the recording liquid 212 is lost. For this reason, the amount of the recording liquid 212 that has been blown out due to inertia in front of the orifice surface before the bubble shrinks is smaller than that shown in FIG. 6. Therefore, the amount of the particles deposited on the recording sheet 107 becomes smaller, and the diameter of the formed dots also becomes smaller.

In the present invention, the condition for the head-to-paper distance for forming minute dots is that the distance is such that the droplets land on the recording sheet before forming droplets during ejection. The maximum head-to-paper distance at which droplets are not formed is:
It is indicated by 1 in FIG. 4 mentioned above. This varies depending on the structure of the recording head and the composition of the ink, but it is approximately 1 to 5 times the diameter of the droplet formed when the gap is separated by 2 or more.
It's about double that.

In the above-described embodiment, the head driving conditions in the minute dot diameter forming mode were the same as in the normal droplet forming mode, but the present invention is not limited to this.

FIGS. 8(a) to 8(d) show step-by-step the ejection operation in the second embodiment of the present invention.

The drive circuit in this embodiment adjusts the distance between the recording head and the recording sheet, and also makes the amount of heat generated by the heating resistor smaller in the minute dot diameter forming mode than in the normal recording mode.

When the recording head and paper are separated, the liquid rises to the orifice side due to bubbling, or a small energy key is driven (this can be achieved by reducing the power applied to the heater) to prevent the liquid from forming droplets, and the liquid rises. The paper was made to collide with the recording sheet in the state shown in Fig. 8(d).
Refer to FIG. 8(e), which shows the process of forming dots by penetrating into the recording sheet 107 (see FIG. 8(e)).

This made it possible to obtain a dot diameter smaller than that shown in FIG.

Further, in the above-described embodiment, the head-to-paper distance is shortened by selecting the minute dot diameter forming mode, but the present invention is not limited to this.

The present invention also includes a recording apparatus that performs small dot recording by fixing the head to paper distance to the above-mentioned distance or less.

The present invention provides excellent effects particularly in bubble jet recording heads and recording apparatuses among ink jet recording systems.

As for typical configurations and principles thereof, it is preferable to use the basic principles disclosed in, for example, US Pat. No. 4,723]29 and US Pat. No. 4,740,796. This method can be applied to both the so-called on-demand type and continuous type, but especially in the case of the on-demand type, it is necessary to arrange the liquid (ink) in accordance with the sheet and liquid path that hold it. By applying at least one drive signal to the electrothermal transducer that corresponds to recorded information and that causes a rapid temperature rise exceeding nucleate boiling, the electrothermal transducer generates thermal energy and heats the recording head. This is effective because film boiling is caused on the working surface, resulting in the formation of bubbles in the liquid (ink) in one-to-one correspondence with this drive signal. The growth and contraction of the bubble causes liquid (ink) to be ejected through the ejection opening to form at least one drop. If this drive signal has a pulse shape,
Since the growth and contraction of bubbles is carried out immediately and appropriately, ejection of liquid (ink) with particularly excellent responsiveness can be achieved, which is more preferable. As this pulse-shaped drive signal, those described in US Pat. No. 4,463,359 and US Pat. No. 4,345,262 are passed. Incidentally, U.S. Patent No. 4313 relates to the temperature increase rate of the heat acting surface.
By adopting the conditions described in the specification of No. 124, even more excellent recording can be achieved.

The configuration of the recording head includes, in addition to the combined configuration of ejection ports, liquid paths, and electrothermal converters (straight liquid flow path or right-angled liquid flow path) as disclosed in the above-mentioned specifications, a heat acting section. U.S. Pat. No. 4,558,333, U.S. Pat. No. 4,459,600 discloses a structure arranged in a bending region.
The structure described in the specification may be used. In addition, Japanese Patent Application Laid-Open No. 1983 discloses a configuration in which a common slit is used as a discharge part of a plurality of electrothermal converters.
No. 23670 and Japanese Unexamined Patent Publication No. 1, 1982, which discloses a configuration in which a discharge portion is provided with an opening that absorbs pressure waves of thermal energy key.
The present invention is also effective with a configuration based on Publication No. 38461.

Furthermore, a full-line type recording head having a length corresponding to the width of the maximum recording medium that can be recorded by the recording apparatus can be obtained by combining complex recording heads as disclosed in the above-mentioned specification. Either a configuration that satisfies the length or a configuration as a single recording head formed integrally may be used, but the present invention can more effectively exhibit the above-mentioned effects.

In addition, a replaceable chip-type recording head that is installed in the main body of the device enables electrical connection with the main body of the device and supply of ink from the main body of the device, or a printhead that is integrated into the print head itself. The present invention is also effective when a cartridge type recording head is used.

Further, it is preferable to add auxiliary means such as a recovery means for the recording head, a preliminary auxiliary means, etc., which are provided as a configuration of the recording apparatus of the present invention, because the effects of the present invention can be further stabilized. .

Specifically, these include caving means, cleaning means, pressurizing or suction means,
Preheating means using an electrothermal transducer, a separate heating element, or a combination thereof, and a preliminary ejection mode in which ejection is performed separately from recording are also effective for stable printing.

Furthermore, the recording mode of the recording device is not limited to a recording mode in which only the mainstream color such as black is used; the recording head may be configured integrally or in combination with a plurality of recording heads; The present invention is also extremely effective for devices equipped with at least one full color image.

In the embodiments of the present invention described above, the ink is explained as a liquid, but it is an ink that solidifies at room temperature or lower, and is softened or liquid at room temperature, or in the above-mentioned inkjet, the ink itself is heated at 30°C or higher and 70°C. Generally, the temperature is controlled within a range of .degree. C. or less so that the viscosity of the ink is within a stable ejection range, so it is sufficient if the ink is in a liquid state when the recording signal is applied. In addition, it is possible to proactively prevent temperature rise caused by thermal energy by using it as energy to adversely change the ink from a solid state to a liquid state, or to use ink that solidifies when left in order to prevent ink evaporation. Iruka,
In any case, the property of liquefying for the first time due to thermal energy, such as ink that is liquefied by applying thermal energy in response to a recording signal and ejected as liquid ink, or that has already begun to solidify by the time it reaches the recording medium. It is also possible to use the following ink in the present invention. In such a case, the ink is held in a liquid or solid state in the recesses or through holes of the porous sheet, as described in JP-A-54-56847 or JP-A-60-71260. It may also be in a form that faces the electrothermal converter. In the present invention, the most effective method for each of the above-mentioned inks is to perform the above-mentioned film boiling method.

[Effects of the Invention] Since the present invention is configured as described above, it has the following effects.

According to the first aspect of the present invention, it is possible to easily adjust the recording dot diameter according to the recording mode.

According to the invention described in claim 2, the diameter of the recording dot can be made small, and there is an effect that high-definition image recording can be performed.

[Brief explanation of drawings]

FIG. 1 is a schematic side view of an embodiment of the present invention, FIG. 2 is a schematic configuration diagram of the recording head 101 in FIG. 1, FIG. 3 is a diagram showing the configuration of an ink supply means for the recording head, and FIG. FIG. 4 is a diagram showing the relationship between the distance between the recording head and the recording sheet and the diameter of recorded dots, FIG. 5 is a diagram showing the configuration of the gap adjustment means in the first embodiment, and FIGS. 6th
FIG. 7(g) and FIGS. 7(a) to 7(g) are diagrams showing step-by-step ejection operations in the normal recording mode and minute dot format mode in the first embodiment, respectively. , FIG. 8(a) to FIG. 8(g) are diagrams showing step-by-step the ejection operation in the second embodiment of the present invention. 101.1018, 101y, 101m, 101c・
... Recording head 102 - Block 103 - Capping unit 105 - Back platen 106 - Paper feed cassette 1
07-・Recording sheet 108- Pickup roller 109.111-・Conveyance roller 111-・Conveyance path 1
13-Heater 114-...Fan 115-Exhaust port-ra 116-) Ray 202-board
203-・Electrothermal converter 204・-electrode
205--Nozzle wall 206--Top plate 20
7-・Liquid supply pipe 208.302-・Common liquid chamber 2
09-・Connector 210-・Nozzle 211-
... Orifice surface 303 - Orifice 305 - Recording liquid supply tank 306 - Main tank 307 - Supply pipe 308
．． 320-Glance flow valve 309-...Recovery pump 31
1-... Circulation pipe 312-... Solenoid valve 5011
．． 5012 ”” Motor 5021.5C112 ... Gap adjustment screw 601 ... Droplet. Patent applicant Canon Co., Ltd. Agent Patent attorney Tadashi Wakabu Figure 3 Helmet 4 sides (b) (CI (d) yA6 Figure 7

Claims (1)

[Claims] 1. In an inkjet recording device that performs recording on a recording medium by ejecting a recording liquid from a recording head, a gap that adjusts the distance between the recording head and the recording medium according to a recording mode. An inkjet recording device characterized by having an adjustment means. 2. In the inkjet recording apparatus according to claim 1, when the recording mode is a mode for forming minute dots, the gap adjustment means adjusts the distance between the recording head and the recording medium by adjusting the distance between the recording head and the recording medium to be ejected from the recording head. An inkjet recording device characterized in that the diameter of a droplet is adjusted to be 5 times or less the diameter of a droplet of a liquid. 3. The inkjet recording apparatus according to claim 1 or 2, wherein the recording head is a full-line type in which ejection ports are formed over the entire width of the recording area of the recording sheet. 4. Claim 1, wherein the recording head ejects ink using thermal energy, and is equipped with an electrothermal converter for generating the thermal energy.
3. The inkjet recording device according to item 2, item 3, or item 3.