JPH08238772A - Inkjet recording head and inkjet recording device - Google Patents

Abstract

(57) [Summary] [Purpose] Prevent troubles caused by bubbles that may occur in the ink circulation flow path, etc., and shorten the recording operation time and the ink consumption while maintaining stable recording operation. (EN) An inkjet recording head and an inkjet recording device that reduce the running cost. [Configuration] A common liquid chamber adjacent to a plurality of nozzles is
It is divided into a second common liquid chamber, the first chamber communicates directly with a plurality of nozzles, the second chamber is close to the first chamber, is on the opposite side of the nozzle, and is between the ink tank. It forms a part of the circulation path and has a plurality of communication passages with the first chamber.
The flow path resistance in the first chamber is large, and the bubbles accompanying the ink flow are difficult to enter the first chamber.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet recording head and an ink jet recording apparatus. More specifically, an electric signal is sent to an electrothermal converter provided in the recording head to heat the recording ink. An ink jet recording apparatus having a circulation path between a recording head of an ink jet recording apparatus for generating bubbles and ejecting droplets and an ink tank, and an ink pressure feeding means in the circulation path, and an ink jet recording used therefor Regarding the head.

[0002]

2. Description of the Related Art FIG. 8 is a schematic plan view of an embodiment of an ink jet recording head according to the prior art, and FIG. 9 shows a relationship between an ink circulation flow rate and an ink pump driving time of an ink jet recording apparatus using this embodiment. 10 is a diagram showing the relationship between the ink circulation flow rate and the amount of ink ejected from the nozzles of the ink jet recording apparatus using this embodiment, and FIG.
FIG. 12 is a schematic perspective view showing the configuration of the present embodiment, and FIG. 12 is an explanatory diagram showing a partial configuration of an inkjet recording apparatus using the present embodiment.

An ink jet recording head used in an ink jet recording apparatus generally has an ejection port for a recording liquid droplet, a liquid channel for supplying a recording liquid to this ejection port, and energy provided in a part of this liquid channel. Action part,
It is provided with an energy generating means for generating the energy for forming a droplet that acts on the recording liquid in the acting portion.

As the energy generating means, one using an electromechanical transducer such as a piezo element is irradiated, and electromagnetic waves such as a laser are radiated to be absorbed in a liquid present therein to generate heat.
Known are ones that eject and fly droplets by the action of this heat generation, or heating elements such as electrothermal converters.

Among them, an ink jet recording head which uses an electrothermal converter as an energy generating means and ejects recording liquid droplets from a discharge port by thermal energy has the following advantages.

A) Ejecting openings for ejecting recording droplets to form flying droplets can be arranged at a high density to easily take a suitable structure for recording with high resolution. It is possible.

B) It is easy to make the structure compact.

C) It is possible to make full use of the advantages of IC technology and microfabrication technology, in which the recent technological advances in the semiconductor field and the remarkable improvement in reliability have been made for their fabrication. In addition, it is easier to make the product more flat and planar (two-dimensional), make the discharge ports more multi-dimensional, and make the density higher, and it is possible to mass-produce, and the manufacturing cost is low.

An ink jet recording head having multiple discharge ports manufactured through a semiconductor manufacturing process using an electrothermal converter as an energy generating means is provided with a liquid path corresponding to each discharge port. It is known that an electrothermal converter is provided for each of them, and a recording liquid is supplied from a common liquid chamber communicating with each liquid passage.

FIG. 8 shows a schematic plan view of one construction of such an ink jet recording head, and FIG. 11 shows a perspective view thereof.

In this ink jet recording head, the electrothermal converter 3, the electrode 4, the nozzle 5 and the top plate 6 formed on the substrate 2 are subjected to semiconductor manufacturing process steps such as etching, vapor deposition and sputtering. It is configured.

The recording ink 12 is supplied from a liquid storage chamber (ink tank) (not shown) into the common liquid chamber 8 of the recording head 1 through the ink supply pipe 20a. In the figure, reference numeral 9 is a connector for an ink supply pipe.

The ink 12 supplied into the common liquid chamber 8 is supplied into the liquid passage 10 by capillarity, and is stably held by forming a meniscus at the discharge port surface 11 at the tip of the liquid passage.

When the electrothermal converter 3 is energized, the recording liquid on the surface of the electrothermal converter is heated and a bubbling phenomenon occurs, and ink energy is ejected from the ejection port surface 11 by the energy of the bubbling. .

With the above-described structure, it is possible to manufacture a multi-fluid ink jet recording head having 128 liquid passages or 256 liquid passages with a high-density liquid passage arrangement having a liquid passage density of 16 liquid passages / mm. Become.

FIG. 12 shows a conventional example in which an ink jet recording apparatus is constructed by mounting the above ink jet recording head. In this figure, for convenience of understanding, the recording head 1 is shown in a plan view and the ink tank 19 is shown in a perspective view.

The ink jet recording head 1 is connected to an ink tank 19 via ink supply pipes 20a and 20b, and serves as an ink pressure feeding means provided on the way of the ink supply pipe 20a after the recording head 1 is mounted on an ink jet recording apparatus. The ink in the ink tank 19 is filled and supplied in the common liquid chamber 8 of the recording head 1 by driving the ink pump 18 of FIG. And recording head 1
The recording operation is enabled.

After the common liquid chamber 8 of the recording head 1 is filled with ink, the ink passes through the ink supply pipe 20b and is collected again in the ink tank 19. In this way, the recording head 1 and the ink tank 19 are connected by the ink supply pipes 20a and 20b, and the ink supply pipe 2 is connected.
The ink pressure feeding means 18 is provided in the middle of the path 0a to connect the pipe 2
The ink in 0a is pressure-fed and the pipes 20a, 20b,
A structure for circulating the common liquid chamber 8 is disclosed in Japanese Patent Laid-Open No. 63-1303.
48 and the like.

Then, in the case of the above-mentioned ink jet recording apparatus, when the ink jet recording head 1 is exchanged or left for a long period of time, bubbles 44 in the ink supply pipes 20a, 20b.
May be mixed in, and the recording ink 12 cannot be supplied from the ink tank 19 to the inkjet recording head 1. Therefore, in the related art, as shown in FIG. 12, the ink pressure feeding means 1 provided in the ink supply pipe path.
8 to drive the ink in the ink supply pipes 20a and 20b under pressure, and the air bubbles 44 in the ink supply pipe are pressurized and circulated to the ink supply pipe 20b through the common liquid chamber 8 of the recording head 1 together with the ink. Then, the method of discharging the ink into the ink tank 19 is adopted.

[0020]

FIG. 9 shows the relationship between the ink pump drive time T _P as the ink pressure feeding means and the ink circulation amount Q in the ink supply pipe. That is, in order to discharge the bubbles in the ink supply pipe together with the ink by the ink pump into the ink tank as a pressurized circulation, the bubbles in the ink supply pipe must be discharged to the ink tank unless the ink circulation flow rate Q by the ink pump is increased to some extent. The ink pump drive time T _P required for discharging the ink into the tank becomes long, and it takes a long time before the ink jet recording apparatus becomes ready for recording operation. Therefore, it is necessary for the ink pump to shorten the ink pump drive time T _P and to secure a sufficient ink circulation flow rate Q that allows the bubbles in the ink supply pipe to be circulated and discharged into the ink tank. Then, by driving the ink pump for a time T _P1 second at an ink circulation flow rate Q ₁ cm ³ / sec that satisfies this condition, the bubbles in the ink supply pipe are discharged into the ink tank. However, there is a problem in that the recording ink is discharged from each nozzle of the recording head 1 during the ink pressurization circulation operation.

As shown in FIG. 10, the ink amount W discharged from each nozzle of the recording head largely depends on the ink circulation flow rate Q by the ink pump and the ink pump drive time T _P , and the ink circulation flow rate Q ₁ cm. ^{When the} ink pump is driven for a time T _P1 second at ³ / sec, each nozzle of the recording head ejects ink not used for recording of W ₁ cm ³ , increasing the amount of waste ink and consuming ink. Since the amount also increases, there arises a problem that the running cost becomes high.

This tendency becomes more serious as the number of liquid passages in the recording head 1 increases and the number of liquid passages increases to 64, 128, 256 ...

Therefore, an object of the present invention is to pay attention to the above-mentioned conventional problems, and to reduce the recording time while maintaining a stable recording operation, and to reduce the ink consumption, and the ink jet with low running cost. An object of the present invention is to provide a recording head and an inkjet recording device.

[0024]

The ink jet recording head of the present invention sends an electric signal to an electrothermal converter provided in the recording head to heat the recording ink and generate bubbles to form droplets. In an inkjet recording head used in an inkjet recording apparatus that has a circulation path between a recording head of an inkjet recording apparatus for ejecting ink and an ink tank, and has an ink pressure feeding means in the circulation path, a plurality of ejection heads that eject ink A common liquid chamber communicating with a plurality of liquid passages respectively communicating with the outlets, a first common liquid chamber directly communicating with the plurality of liquid passages, and a side of the plurality of liquid passages adjacent to the first common liquid chamber. Is provided on the opposite side, has a plurality of communication passages with the first common liquid chamber, and forms a part of the circulation path and has an inflow port from the ink tank and an outflow port to the ink tank. The second Is characterized by being divided into a liquid chamber, the.

In the ink jet recording head of the present invention, the tip end of each of the inflow pipe and the outflow pipe forming the inflow port and the outflow port in the second common liquid chamber is
It is preferable that a connector is connected to each of the inks for equalizing the flow of diffusion and focusing.
Further, in the inkjet recording head of the present invention, it is desirable that the cross-sectional area S _b of the flow passage in the second common liquid chamber is larger than the cross-sectional area S _a of the flow passage in the first common liquid chamber. Further, in the ink jet recording head of the present invention, the connector is arranged on the ceiling side of the second common liquid chamber, and the communication passage that connects the first common liquid chamber and the second common liquid chamber is the substrate of the ink jet recording head. It is also desirable that it is arranged on the side.

The ink jet recording apparatus of the present invention includes these ink jet recording heads.

[0027]

When the print head is replaced or left for a long period of time, air bubbles are mixed in the ink circulation path. However, the ink pressure feeding means provided in the ink circulation path is driven to circulate and discharge the air bubbles in the ink circulation path together with the ink. In this case, the second common liquid chamber connected to the first common liquid chamber directly communicating with each nozzle of the recording head of the present invention and the ink circulation path are connected to each other, and the second common liquid chamber of the recording head is connected. Means to circulate the bubbles and discharge them to the outside of the recording head. Therefore, it is possible to shorten the driving time of the ink pressure feeding means, reduce the amount of ink discharged from each nozzle of the recording head when driving the ink pressure feeding means, and provide an ink jet recording apparatus with a small amount of waste ink.

[0028]

Embodiments of the present invention will now be described with reference to the drawings.

FIG. 1 is a schematic plan view of an embodiment of the ink jet recording head of the present invention, and FIG. 2 is a line showing the relationship between the ink circulation flow rate and the ink pump drive time of the ink jet recording apparatus using this embodiment. 3 and FIG. 3 are diagrams showing the relationship between the ink circulation flow rate and the ink amount ejected from the nozzles of the ink jet recording apparatus using this embodiment, and FIG. 4 is a block diagram showing the configuration of the ink jet recording apparatus using this embodiment. ,
FIG. 5 is a schematic perspective view of an inkjet recording apparatus using this embodiment.

In FIG. 1, the common liquid chamber is the recording head 1
The first common liquid chamber 8a that directly communicates with the plurality of nozzles 5 that eject recording ink droplets from each of the ejection ports 13 and the first common liquid chamber 8a that communicates with the first common liquid chamber 8a through the plurality of communication passages 41. A connector 9 that is provided on the recording head 1 by being divided into a second common liquid chamber 8b and that is connected to the ink supply pipes 20a and 20b is connected to the second common liquid chamber 8b.

When the air bubbles 44 mixed in the ink supply pipe 20a are pressurized and pressure-fed in the direction of arrow A together with the ink in the ink supply pipe 20a by driving the ink pump 18, the air bubbles 44 pass through the communication passage to form the first bubble. Common liquid chamber 8a
As a result of the resistance being smaller when passing through the inside of the second common liquid chamber 8b than when entering, as a result of passing through the inside of the second common liquid chamber 8b of the recording head 1 in the direction of arrow C, ink is supplied from the recording head 1. The recording ink 12 is circulated and discharged into the pipe 20b, and the recording ink 12 is stored in the first and second common liquid chambers 8a and 8b of the recording head 1.
It circulates inside and is discharged in the direction of arrow B in the ink supply pipe 20b. In FIG. 2, the recording head 1 of the present invention is shown.
In contrast, the ink pump drive time T _P (second) and the ink circulation amount Q (cm ³ / second) in the ink supply pipe 20a when the ink pump 18 is driven to pressurize and supply the ink in the ink supply pipe 20a The relationship is shown in the figure. By configuring the common liquid chamber of the recording head 1 so that the bubbles 44 pass through the second common liquid chamber 8b when the bubbles 44 circulate through the recording head 1, The ink pump drive time T _P (seconds) required to circulate and discharge the bubbles 44 via the head 1 can be further shortened, and in the conventional recording head, the ink circulation flow rate Q ₁ cm ³ / to sufficiently discharge the bubbles 44. Although the ink pump drive time T _P1 second was required in seconds, the drive time T _P1 ′ second (T _P1 >) in the recording head of the present invention.
T _P1 ′), and the ink pumped by the ink pump 18 is directly supplied to the first common liquid chamber 8a.
The pressure of the ink that is not fed in and is applied to each nozzle 5 of the recording head is reduced.

As a result, as shown in FIG. 3, the amount of ink discharged from each nozzle of the recording head W ₁ ′ (cm ³ ).
Can also be reduced (W ₁ > W ₁ ′), the bubbles 44 can be circulated and discharged more easily than before, the amount of waste ink is small, and thus the running cost can be reduced.

Here, the relationship of the arrangement of the connector 9 between the communication passage 41 connecting the first and second common liquid chambers 8a and 8b and the ink supply pipes 20a and 20b connected to the second common liquid chamber 8b is the ink. After the bubbles 44 in the supply pipe 20a pass through the connector 9 and are pressure-fed to the second common liquid chamber 8b, the first
Of the connector 9 provided in the second common liquid chamber 8b is provided with a partition wall 45 on the opposite side of the connector 9 provided in the second common liquid chamber 8b from the common liquid chamber 8a. 44 does not enter the first common liquid chamber 8a directly through the communication passage 41, but makes it easier to circulate in the second common liquid chamber 8b in the direction of arrow C.

In FIG. 4, a gear pump 18 is provided in the middle of the path of the ink supply pipe 20a as an ink pressure-feeding means for pressure-feeding the ink in the ink supply pipe 20a. When bubbles are mixed in the ink supply pipes 20a, 20b when the recording head 1 is replaced or left for a long period of time, a signal from the control unit 30 drives a gear pump 18 provided on the way of the ink supply pipe 20a. The ink in the ink supply pipes 20a, 20b is indicated by an arrow A,
Air bubbles are discharged into the ink tank 19 by pressure-feeding in the B direction and circulating the ink.

At this time, in order to remove the ink flowing out from each nozzle of the recording head 1 from the ejection port surface of the recording head, a capping means 22 is generated by a signal from the control section 30.
The carrying section 32 of the capping means 22 is moved so that the ink absorber 34 provided in the recording medium comes into contact with the recording head 1.
Then, the compressed air from the air pump 37 is blown from the air blowing hole 35 provided in the air blowing means 36 to the recording head 1.
Is ejected toward the ejection port surface 11 of the recording head 1 to blow off the ink that has overflowed onto the ejection port surface 11 of the recording head 1, and the ink absorber 34 absorbs the ink. As a result, the adhered ink droplets that have adhered and accumulated on the ejection port surface 11 of the recording head 1 can be almost completely removed before the recording operation by the recording head 1 is started.

Further, the recording operation of the recording head 1 is started, and the recording head 1 discharges recording ink droplets while scanning the carriage 21 carrying the recording head 1.

By the way, as described above, when the ink pump 18 is driven and the ink in the ink supply pipes 20a, 20b is pressure-fed, the bubbles 44 mixed in the pipes 20a, 20b are discharged into the ink tank 19. In addition, the recording ink flows out from each nozzle of the recording head 1, and the amount of ink that is not used for recording flows out to increase the running cost.

Therefore, in the present invention, when the air bubbles 44 mixed in the ink supply pipe 20a are driven by the ink pump 18 to be pressure-fed and circulated in the ink supply pipe together with the ink, too much ink is ejected from each nozzle of the recording head 1. The common liquid chamber of the recording head 1 is configured so as not to flow out, and the bubbles 44 are discharged by pressurization circulation of ink.

In FIG. 5, between the recording head 1 and a platen roller 23 for forming and holding a recording surface of a recording medium (not shown) such as paper, a recording medium in the form of continuous paper or cut paper is provided. Are conveyed while being pressed against the platen roller 23 by a pinch roller (not shown). The recording head 1 is mounted on a carriage 21, and along the two guide rails 24a and 24b, S _A and S in FIG.
Serial scan drive is performed in the _B direction, and recording is performed on the recording medium in the process. This carriage 21
It is connected to the shaft 27 of the motor 26 via a belt 29 and a pulley 28a provided between the pulleys 28a and 28b, and is driven in the S _A and S _B directions according to the rotation of the motor 26.

The recording head 1 has, for example, four recording units corresponding to four colors of yellow (Y), magenta (M), cyan (C) and black (B).
The recording unit for recording Y, M, C, and B is provided with an independent ink circulation path, and gear pumps 18Y, 18M, and 18 as ink pressure feeding means are provided in the middle of the recording units.
Supply pipe (pipe) 20aY in which C and 18B are arranged,
Ink is supplied from the ink tanks 19Y, 19M, 19C and 19B via 20aM, 20aC and 20aB. Also, each of these units is connected to the corresponding ink tank through a pipe without a gear pump in the middle.

In FIG. 5, this pipe is a pipe 20b for supplying yellow ink for simplification.
Only Y is shown.

Here, as the ink pressure feeding means, any form such as a gear pump, a diaphragm pump, a vane pump, a piston pump, a turbine pump, a tube pump or the like can be used as long as it can appropriately change the pressure or the pressure feeding speed. It may be one.

The capping means 22 is provided outside the recording image area of the recording head, and faces the ejection portion of the recording head 1 at the home position HP of the recording head f.
It is possible to move in the direction and bond to the recording head 1.

Next, the second embodiment will be described.

FIG. 6 is a schematic side view of the second embodiment of the ink jet recording head of the present invention.

In the present embodiment, the flow path resistance when the recording ink 12 circulates in the first common liquid chamber 8a and the second common liquid chamber 8b provided in the recording head 1 is determined by the second common liquid chamber 8b. Is designed to be smaller. That first common liquid chamber flow path resistance R _a, if the flow path resistance of the second common liquid chamber was R _b, when viewed in D-D 'cross section in the recording head 1 shown in FIG. 1 first a liquid chamber cross-sectional area S _a of the common liquid chamber 8a of the liquid chamber cross-sectional area S _b of the second common liquid chamber 8b, "S _a <S _b"
With such a configuration, the flow path resistance of the first and second common liquid chambers can be set to “R _a <R _b ”, and the second common liquid chamber 8 b can pass through the connector 9 and The bubbles 44 that have been pressure-fed to the second common liquid chamber 8a do not enter the second common liquid chamber 8a.
It is easier to circulate in the common liquid chamber 8b in the direction of arrow C, and therefore the amount of ink discharged from each nozzle 5 of the recording head 1 can be further reduced.

Next, a third embodiment will be described.

FIG. 7 is a schematic side view of the third embodiment of the ink jet recording head of the present invention.

In this embodiment, the ink supply pipe 2
The connector 9 connected to 0a is arranged on the ceiling side of the second common liquid chamber 8b, and the first common liquid chamber 8a and the second common liquid chamber 8b are arranged.
A communication passage 41 that communicates with and is disposed on the substrate 2 side. The connector 9 provided in the second common liquid chamber 8b in this way
And the position of the communication passage 41 that communicates the first common liquid chamber 8a and the second common liquid chamber 8b are different from each other in height, so that the second common liquid passes through the connector 9. The bubbles 44 that have been pumped into the liquid chamber 8b are
When it circulates while receiving buoyancy along the inner wall surface 46 in b, it moves along the wall surface that is distant from the communication passage 41 in a distance,
It can be made more difficult to enter the first common liquid chamber 8a through the communication passage 41, and the bubbles 44 can be more easily circulated in the second common liquid chamber 8b.

[0050]

As described above, according to the present invention, the first common liquid chamber, which directly communicates with the plurality of nozzles for ejecting the recording ink droplets from the respective ejection ports, and the communication passage to the first common liquid chamber. A second common liquid chamber communicating with the second common liquid chamber on the recording head, and an ink circulation path between the recording head and the ink tank is connected to the second common liquid chamber on the recording head;
At the time of pressure-feed circulation of the ink in the ink circulation path by the ink pressure-feeding means, bubbles mixed in the ink circulation path in the second common liquid chamber of the recording head are circulated, and recording is performed in the first and second common liquid chambers. By circulating the ink, it is possible to shorten the time for driving the ink pressure feeding means when the recording head is replaced or left for a long time, and is not used for recording discharged from each nozzle of the recording head when driving the ink pressure feeding means. There is an effect that the amount of ink can be reduced and therefore an ink jet recording apparatus with low running cost can be provided.

[Brief description of drawings]

FIG. 1 is a schematic plan view of an embodiment of an inkjet recording head of the present invention.

FIG. 2 is a diagram showing a relationship between an ink circulation flow rate and an ink pump drive time of an inkjet recording apparatus using this embodiment.

FIG. 3 is a diagram showing the relationship between the ink circulation flow rate and the ink amount ejected from nozzles of the inkjet recording apparatus using this embodiment.

FIG. 4 is a block diagram showing a configuration of an inkjet recording apparatus using this embodiment.

FIG. 5 is a schematic perspective view of an inkjet recording apparatus using this example.

FIG. 6 is a schematic side view of a second embodiment of the inkjet recording head of the present invention.

FIG. 7 is a schematic side view of a third embodiment of the inkjet recording head of the present invention.

FIG. 8 is a schematic plan view of an example of an inkjet recording head according to the related art.

FIG. 9 is a diagram showing the relationship between the ink circulation flow rate and the ink pump drive time of the inkjet recording apparatus using this embodiment.

FIG. 10 is a diagram showing the relationship between the ink circulation flow rate and the ink amount ejected from nozzles of an inkjet recording apparatus using this embodiment.

FIG. 11 is a schematic perspective view showing the configuration of the present embodiment.

FIG. 12 is an explanatory diagram showing a partial configuration of an inkjet recording apparatus using this embodiment.

[Explanation of symbols]

1 Recording Head 2 Substrate 3 Electrothermal Converter 4 Electrode 5 Nozzle 6 Top Plate 8 Common Liquid Chamber 8a First Common Liquid Chamber 8b Second Common Liquid Chamber 9 Connector 10 Liquid Channel 11 Discharge Port Surface 12 Ink 13 Discharge Port 14 Recording Ink Drops 18, 18B, 18C, 18M, 18Y Ink pressure feeding means 19, 19B, 19C, 19M, 19Y Ink tanks 20, 20a, 20aB, 20aC, 20aM, 20a
Y, 20b Ink supply pipe 21 Carriage 22 Capping means 23 Platen roller 24a, 24b Guide rail 26 Motor 27 Shaft 28a, 28b Pulley 29 Belt 30 Control part 31 Console 32 Conveying part 33 Ink cartridge 34 Ink absorber 35 Air blowing hole 36 Air blowing means 37 Air pump 39 Head temperature detecting means 40 Head heater 41 Communication passage 44 Bubble 45 Partition wall 46 Inner wall surface

Claims (5)

[Claims] 1. A recording head and an ink of an ink jet recording apparatus, wherein an electric signal is sent to an electrothermal converter provided in a recording head to heat the recording ink to generate bubbles and eject droplets. Has a circulation path between the tank and
In an inkjet recording head used in the inkjet recording apparatus having an ink pressure feeding means in the circulation path, a common liquid chamber communicating with a plurality of liquid paths respectively communicating with a plurality of ejection ports for ejecting ink is Between the first common liquid chamber that is in direct communication with the liquid passage and the first common liquid chamber that is adjacent to the first common liquid chamber and that is disposed on the opposite side of the plurality of liquid passages. A second common liquid chamber having a plurality of communication passages and forming a part of the circulation path and having an inflow port from the ink tank and an outflow port to the ink tank. An ink jet recording head, characterized in that 2. A connector for equalizing the flow of ink diffusion and focusing at the tips of the inflow pipe forming the inflow port and the outflow pipe forming the outflow port, respectively, in the second common liquid chamber. The inkjet recording head according to claim 1, further comprising: 3. The cross-sectional area S of the flow path in the second common liquid chamber
The inkjet recording head according to claim 1 or 2, wherein _b is larger than a cross-sectional area S _a of the flow path in the first common liquid chamber. 4. The connector is arranged on a ceiling side of a second common liquid chamber, and a communication passage for connecting the first common liquid chamber and the second common liquid chamber has a substrate side of the ink jet recording head. The ink jet recording head according to any one of claims 1 to 3, wherein the ink jet recording head is disposed in the. 5. An ink jet recording apparatus, comprising the ink jet recording head according to claim 1.