JPH06210864A - Ink jet recording head, ink jet head cartridge and recording apparatus having the recording head - Google Patents

Abstract

PURPOSE:To prevent possible leakage of ink during replacing an ink tank and discharge failure due to the increase of ink viscosity by the use of a recording head having a liquid discharge part and a flow path combination part and an ink jet recording apparatus having a filter part provided on the end of the flow path combination part. CONSTITUTION:When an ink tank 2 and a recording head 1 are separated one to another, a valve 4 acts to block off the ink supplying port 11 through spring 5 so as to prevent the leakage of ink from the tank 2, and when the tank 2 and head 1 are in contact with each other, ink within the tank 2 is introduced to the head 1, and the inner wall of the supplying port 11 comes into close contact with the outer surface of an ink supplied port 10 in order to prevent the leakage of ink. Also, in the case where the head 1 is single, and Impacts such as vibration or dropping take place, leakage of ink is not likely to happen by the surface tension and flow resistance of a filter part 3. As the head 1 is left as a unit, ink exposed in the atmosphere becomes small by the filter 3 in a connecting part of the head and ink tank, thus an evaporating quantity of ink can be decreased, resulting in restraining the discharge failure of the head 1 due to increase of ink viscosity.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet head having an improved ink supply path for ejecting ink for recording, an ink jet head cartridge, and a recording apparatus equipped with the ink jet head.

[0002]

BACKGROUND ART Today, many information recording devices such as printers, facsimiles, and word processors have been developed. As these recording devices, recording devices using an inkjet recording method are widely used because of their advantages such as high resolution, high speed recording, low cost, and miniaturization. As a recording head cartridge mounted in such a recording device, it is possible to replace and use only the ink tank of the ink jet head cartridge with the extension of the life of the recording head in recent years. The recording head and the ink tank can be connected and separated. Inkjet head cartridges have been developed. As such an example, there is an ink jet cartridge in which an ink tank 122 and a recording head 121 as shown in FIG.

In the ink jet cartridge shown in FIG. 12, the ink supply port 123 of the recording head 121 has a tubular structure having a sharp end, and the ink supply unit 1 of the ink tank 122.
24 is made of an elastic material such as rubber having no hole, and the ink supply portion 124 of the ink tank 122 is configured to be closed when the recording head 121 and the ink tank 122 are separated. When the ink tank 122 is connected to the recording head 121, the ink supply hole 1
The sharp end 23 forms a hole in the ink supply portion 124 to form an ink flow path. A filter 125 is provided in the ink tank to prevent dust and the like in the ink tank 122 from moving toward the recording head 121. Recording head 12
A filter 127 is provided in the middle of the ink flow path from the first supply port 123 to the ink discharge nozzle 126, so that dust or the like that has entered from the ink supply port 123 may cause ink when the ink tank 122 is separated. It is prevented that the discharge nozzle 126 is reached.

[0004]

However, in this configuration, when the recording head 121 is separated from the ink tank 122, the ink leaks from the ink supply port 123 to the outside, so that air bubbles are generated in the middle of the ink flow path. There is a case where ejection defects occur due to air bubbles that are mixed in and are mixed during recording after the ink tank 122 is combined. Further, when the recording head 121 is left alone for a long time, or when an ink using a volatile material is used, the ink is evaporated at the ink supply port 123, the viscosity of the ink becomes high, and the ejection failure of the ink occurs. There was a case to do. Further, dust that has entered from the ink supply port 123 is stopped by the filter 127 in the middle of the ink flow path, but if the amount of dust increases, the flow of ink deteriorates and defective ejection from the ink ejection nozzle 62b occurs. In this case, there is a possibility that the recording head 121 may not be usable as a defect before it reaches the end of its life.

[0005]

According to the present invention for solving the above problems, a liquid ejecting section for ejecting ink for recording and an ink tank can be connected, and the ink can be supplied from the ink tank. An ink jet recording head having a flow path coupling section for receiving and a filter section arranged at an end of the coupling section, or an ink jet head cartridge having this recording head, or recording It is a device.

[0006]

In the above means, the recording head has a filter in the vicinity of the end face of the ink flow path means, and even if the ink tank is separated from the head by the flow path resistance of the filter, the ink flow is reduced. It becomes difficult for the ink to leak from the passage means, and it is possible to prevent the ink from leaking when the ink tank is replaced.

Further, since it is possible to reduce the evaporation of ink from the end surface of the ink flow path of the recording head, it is possible to prevent the increase in ink viscosity due to this and prevent defective ejection.

Further, even if dust or the like adheres to the filter portion and the flow of ink is deteriorated, the dust can be cleaned and removed because the filter is at the end portion, and the recording head can be used again. Therefore, the life of the recording head can be used and the economy is improved.

[0009]

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

(First Embodiment) FIG. 1 is a schematic sectional view of an ink jet head cartridge in which a recording head and an ink tank according to an embodiment of the present invention are joined. In the figure, 1 is a recording head which ejects ink by an electric signal, 2 is an ink tank which stores ink and supplies it to the recording head 1, 10 is provided in the recording head, and ink is supplied from the ink tank 2 to the recording head 1. An ink supply port 11 serving as a supply passage is an ink supply port provided in the ink tank for supplying ink from the ink tank 2 to the recording head 1 and is made of an elastic material such as rubber. Reference numeral 4 denotes a valve provided in the ink tank, which closes the ink supply port 11 when the ink tank 2 is separated from the recording head 1 and opens the ink supply port 11 when the ink tank 2 and the recording head 1 are combined. Reference numeral 5 is a spring that biases the valve 4 toward the ink supply port 11. Ink supply port 10 to ink supply port 1
1 is opened, the valve 4 of the ink tank is opened and the ink in the ink tank 2 is guided to the recording head 1. A filter 3 is provided at the end of the ink supply port 10. Reference numeral 7 is an ink ejecting portion in which nozzles for ejecting ink are formed.

In the above structure, when the ink tank 2 and the recording head 1 are in the separated state, the valve 4 closes the ink supply port 11 by the spring 5 to prevent the ink from leaking from the ink tank 2. When the ink tank 2 and the recording head 1 are connected, the ink in the ink tank 2 is guided to the recording head 1 and the inner wall of the ink supply port 11 is in close contact with the outer wall of the ink supply port 10 to prevent ink leakage. ing.
In addition, when the recording head 1 alone is subjected to shock such as vibration or drop, ink is less likely to leak due to the surface tension of the filter 3 and the flow path resistance. Further, when the recording head 1 is left alone, the area of the ink exposed to the atmosphere is reduced by the filter 3 provided at the connection portion between the head and the ink tank, and the evaporation amount of the ink can be reduced. The ejection failure of the recording head 2 due to the increase in the viscosity of the ink can be suppressed. In addition, the recording head 1
When left alone, the filter 3 can prevent dust such as paper dust from entering the ink flow path in the recording head 1, and can prevent the nozzles of the ink ejection unit 7 from being clogged. . Further, since the dust attached to the filter 3 can be easily cleaned, the defect of the recording head 1 due to the dust attached can be repaired.

FIG. 2 is a schematic perspective view showing the carrier portion of the recording apparatus according to the embodiment of the present invention. In the figure,
102 is a carrier provided in the main body of the recording apparatus that holds the recording head 1 and the ink tank 2, 106 is a head lever that holds and releases the recording head 1, 107 is an ink tank lever that attaches and detaches the ink tank 2, and 108 is A head fixing spring for fixing the recording head 1 to the carrier 102. Each of these parts constitutes a recording head part and a carrier part of the recording apparatus.

FIG. 3 is a sectional view showing the connecting portion of the recording head 1 to the carrier 102 as seen from the direction of FIG. 2a. In the figure, 109 is a positioning pin which is fixed to the carrier 102 and engages with a hole provided in the recording head 1 to perform positioning in the vertical direction and the direction perpendicular to the paper surface of the drawing, and 110 is fixed to the carrier 102 and is in the direction of FIG. 3a. A stopper for receiving the recording head 1 pressed against the recording head 401, a flexible cable 401 for electrically connecting the recording apparatus main body and the recording head 1, 111 a flexible cable 40 sandwiched between the flexible cable 401 and the carrier 102.
A pad for elastically supporting 1 and a contact portion 15 provided on the recording head 1 and electrically connected to a heater portion in the recording head 1.

The recording head 1 is pressed from the head fixing spring 108 in the direction a through a lever (not shown), and its position is determined by the engagement between the hole provided in the recording head 1 and the positioning pin 109 and the stopper 110. Uniquely determined by the interference of. In this way, the recording head 1 and the carrier 102 are mechanically connected.

Further, a plurality of electrical contacts are provided at opposing positions on the end surface of the contact portion 15 provided on the recording head 1 and the end portion of the flexible cable 401, and these are pressed with a predetermined pressure. Thus, the recording apparatus main body and the recording head 1 are electrically connected. At this time, since it is necessary to press-contact a plurality of electrical contacts at once, the pad 111 made of an elastic material in order to press-contact them uniformly.
Is put in the pressing part. The material of the pad 111 is, for example, silicon rubber, and the reaction force generated when the pad 111 is pressed is configured to be much smaller than the force of the head fixing spring 108 pressing the recording head 1.

In particular, the electrical contacts provided on the flexible cable 401 may be formed in a protruding shape in order to concentrate the stress when pressed and ensure the connection.

In the present embodiment, the electrical or mechanical coupling portion is provided on the recording head side, but it is not restricted by this, and the ink tank 2 side or the recording head 1 side and the ink tank 2 side is provided. It may be provided on both sides, or the electrical coupling part and the mechanical coupling part may be separately provided on either side.

Next, the above-described recording head 1 and ink tank 2
The configuration and operation of the recording device equipped with the carrier 102 will be described.

FIG. 4 is a schematic perspective view showing the outline of the recording apparatus according to this embodiment.

The carrier 102, on which the head cartridge 101 is mounted, engages with the pin (which engages with the spiral groove 105 of the lead screw 103 which rotates via a transmission mechanism (not shown) in association with the forward / reverse rotation of the carrier motor 402a. (Not shown), and is reciprocated in the directions of arrows a and b with the rotation of the lead screw 103. A sliding shaft 104 regulates the rotation of the carrier. In addition, the carrier sensor 5
10, the carrier 102 determines the position (home position) in the directions of the arrows a and b. Reference numeral 301 denotes a recovery unit, which is a cap 3 facing the ejection port surface of the head cartridge 101 at a predetermined position (for example, home position) outside the recording area of the head cartridge 101.
02, and a cap advancing / retreating drive unit (not shown) for abutting this on the ejection port surface to protect the ejection port surface during non-recording. Further, at the time of contact, there is a pump for sucking ink from the discharge port to discharge the thickened ink, dust, bubbles, etc. to improve the ink discharge state, and a member for storing the sucked waste ink. It may be provided.

Further, the head cartridge 101 has a wiper (not shown) for cleaning the vicinity of the discharge port.

Reference numeral 201 denotes a conveying roller for conveying the recording medium 6 in the direction c in the figure, and 202 denotes a pinch roller for pressing the recording medium 6 against the conveying roller 201, which is sandwiched between the pair of rollers for recording. At times, the recording medium 6 is intermittently fed in the direction c in the figure. The transport roller 201 is engaged with the transport motor 402b via the power transmission mechanism of the transport roller gear 205 and the transport roller idler gear 206, and receives the driving force. Further, the pinch roller 202 comes into contact with the conveyance roller 201 by operating the release lever 210.
Separation is possible.

Reference numeral 207 is a platen for controlling the recording surface of the recording medium 6 to be flat. Also, this platen 20
A member for bringing the recording medium 6 into close contact with the recording medium 7 and preventing the recording medium 6 from floating may be provided.

Reference numeral 213 denotes a paper discharge roller that rotates in synchronization with the transport roller 201 to discharge the recording medium 6 on which recording has been completed in the direction c in the figure, and through the paper discharge roller 213 and the recording medium 6. A spur roller 214 that is driven at the opposite position
Is provided. The recording medium 6 is ejected to the outside of the printer by these rollers after recording is completed.

Next, a configuration and an electric circuit of an information processing apparatus incorporating the recording apparatus according to this embodiment will be described.

FIG. 5 is a schematic perspective view showing the appearance of an information processing device 604 incorporating the recording device according to this embodiment.

In the figure, 601 is the above-mentioned printer unit, 602 is a keyboard unit having keys for inputting characters, numbers and other characters, keys for giving various commands, and a display having a 603 display. It is a department.

FIG. 6 is a block diagram showing the electric circuit configuration of the information processing apparatus according to this embodiment.

In the figure, reference numeral 501 is a controller that performs main control, 502 is a CPU that executes a certain procedure, for example, a CPU in the form of a microcomputer, and 503 is an area for expanding text data and image data, an area for work, and the like. Is provided in the RAM, 504 is a ROM storing fixed data such as a program corresponding to the above procedure and other font data, and 505 is an execution cycle of the CPU 502 and a timing required for a printing operation by the printer unit 601. Timer, 506 is CPU
An interface unit that connects a signal from 502 and a peripheral device.

Reference numeral 507 is a controller of the printer unit 601, reference numeral 508 is a head driver for sending recording signals and electric power to the head cartridge 101, and 509.
Reference numerals a and b denote motor drivers that send out signals and electric power necessary to drive the carrier motor 402a and the conveyance motor 402b, respectively. A 510 detects the position of the carrier 102 and determines whether the carrier 102 is at the home position, for example. A carrier sensor 511 for detecting the presence / absence of the recording medium 6 in order to prevent recording to a place other than the recording medium 6 when the recording medium 6 is not inserted or the recording is completed up to the end of the page. It is a paper sensor.

Further, 605 is, for example, FDD, HDD,
An external storage device 512 such as a RAM card is an external interface for communicating with another information processing device or for directly connecting to an internal bus to control peripheral devices.

Although not included in the block diagram of FIG. 6, there is another power supply unit for supplying electric power to the above electric circuit, which includes, for example, a rechargeable battery or a disposable dry battery. Alternatively, there is a converter for AC power supply when the information processing apparatus main body is fixed and used.

Recording is performed on the recording medium 6 by the recording device section with the above-mentioned electric circuit configuration. The outline of the recording operation control sequence will be described below with reference to the flowchart of FIG.

The following series of procedures is started by a recording start instruction by a recording command key from the display operation unit of the printer main body or an external recording start instruction by an external interface.

First, at step S1, it is determined whether the display operation unit is in the online state. This is a measure to prevent the recording operation from being started when the printer is not ready when the recording operation start instruction is sent from the outside mainly by communication. When it is determined, the process proceeds to step S2.

At step S2, it is judged whether or not the recording medium 6 is set in the printer unit by a signal from the paper sensor 511 or the like. This is because, particularly in a recording apparatus such as an inkjet printer, when printing is started without a recording medium, ink is scattered in the printer unit to contaminate the apparatus itself, or waste ink such as a recording medium is wasted. This is to prevent it from getting lost.

Further, in this step S2, not only the presence or absence of the recording medium but also the pinch roller 202 and the conveying roller 20 are used.
It may be possible to judge whether or not 1 has been released.
This is to prevent the recording medium 210 from being conveyed normally when the pinch roller 202 is released even if the recording medium 210 is set, so that this is prevented.
The release of the pinch roller 202 can be determined by means such as providing a mechanical switch on the release lever. If it is determined that the recording medium is not properly set, the process proceeds to step S3.

In step S3, a message is issued to draw the operator's attention and set the recording medium. As a method of generating the message, for example, a message may be displayed by turning on a light on the display operation unit, or a method of sounding a buzzer may be displayed.

If it is determined in step S3 that the recording medium 6 is set, the process proceeds to step 4.

At step S4, the recording operation is started.
The head driver 508 drives the head cartridge 101 according to an instruction from the CPU 502, and in synchronization with this, the motor drivers 509a and 509 respectively drive the carrier motor 402a and the carry motor 402b to move and record the carrier 102 in the main scanning direction. Recording is performed while moving the medium in the sub-scanning direction and cleaning the head recording head 1.

Finally, in step S5, for example, the CPU 50
When the end of the recording operation is instructed by the signal from 2, or when it is determined that the predetermined number of recording lines in the sub-scanning direction within one page has been reached and further recording cannot be performed on the recording medium, the paper sensor 511 determines When it is detected that the recording area of No. 6 is completed, it is determined that the recording operation is completed and the recording operation procedure is completed.

As a procedure for ending the recording operation in step S6, first, the carrier 102 is returned to the home position.
This is to cover the ink ejection surface of the recording head 1 with a cap in case the power is turned off after the recording operation is completed. Next, for example, the conveyance motor 402b is driven by a predetermined amount, or the conveyance motor 402b is driven until the recording medium 6 is confirmed to be ejected by the paper sensor 510, thereby ejecting the recording medium. Then, the CPU 502 displays the end of recording on the display / operation unit or notifies the peripheral device through the external interface to complete the recording operation.

(Other Embodiments) FIGS. 8, 9, 10 and 11 show an ink flow path connecting portion of a recording head and an ink tank showing another embodiment according to the present invention.

(Second Embodiment) FIG. 8 shows the ink supply port 10.
This is the case where the walls 80, 80 'are provided at a position higher than the ends.

In the state where the recording head 1 is alone, it is possible to prevent the ink supply port 10 which is the ink supply port on the recording head side from being touched with the hand and to prevent the hand from being contaminated with ink. This prevents dust and the like from adhering to the filter 3 by touching. The walls 80 and 80 'also serve as guides when the ink tank 2 is connected.

Reference numeral 81 denotes a bubble made of an elastic material such as rubber, and the ink supply port 11 with the ink tank 2 as a single body.
Is connected to the recording head 1 to open the ink supply port 11 when the ink supply port 10 enters the ink tank through the ink supply port 11.

(Third Embodiment) FIG. 9 shows the ink supply port 1
This is a case where the protrusion 90 is provided at the zero end. In the unused state of the ink tank 2, the ink supply port 11 of the ink tank 2 is blocked by the seal tape 91.

When the ink tank 2 and the recording head 1 are joined together, the projection 90 provided at the end of the ink supply port 10 of the recording head 1 breaks the seal tape 91, and the ink supply port 10 is connected to the ink tank 2. The ink in the ink tank 2 is introduced into the recording head 1. The ink supply port 11 and the ink supply port 10 are in a press-fitted state using elasticity of a resin or the like at the time of coupling, and ink leakage is prevented. Further, the protrusion 90 is partially present, and has a structure that prevents air from being pushed out at the time of connection and being mixed in the middle of the ink flow path.

(Fourth Embodiment) FIG. 10 shows a structure in which the projection 92 at the end of the ink supply port 10 has a sharp end, and the seal tape of the ink tank is easily broken.

(Fifth Embodiment) FIG. 11 shows a case in which the filter 3 is arranged inside the ink supply port 10 by a height h from the end portion of the ink supply port 10. When a shock is applied to the recording head 1 alone, the ink is It has a structure that is more difficult to leak. However, in this structure, air may be mixed into the ink flow path when the ink tank is connected to the ink tank. Therefore, it is desirable that the height h be equal to or less than the opening diameter D of the ink supply port 10.

The present invention, in particular, in an ink jet recording apparatus, is provided with a means for generating thermal energy as energy used for ejecting ink, and recording by a system in which the thermal energy causes a change in the state of the ink. In a head and a recording device, it has an excellent effect. According to this method, the recording density is increased,
This is because high definition can be achieved.

With regard to its typical structure and principle, for example, US Pat. Nos. 4,723,129 and 4,740 are applicable.
What is done using the basic principles disclosed in 796 is preferred. 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, liquid (ink)
By applying at least one driving signal to the electrothermal converter arranged corresponding to the sheet or the flow path in which the , Heat energy is generated in the electrothermal converter, and the film is boiled on the heat acting surface of the recording head,
As a result, bubbles can be formed in the liquid (ink) in a one-to-one correspondence with this drive signal, which is effective. The growth of this bubble,
The contraction causes the liquid (ink) to be ejected through the ejection opening to form at least one droplet. It is more preferable to make the driving signal into a pulse shape because bubbles can be grown and contracted immediately and appropriately, and thus a liquid (ink) with excellent responsiveness can be ejected. This pulse-shaped drive signal is described in US Pat.
Those described in 345262 are suitable. If the conditions described in US Pat. No. 4,313,244 of the invention relating to the rate of temperature rise on the heat acting surface are adopted, more excellent recording can be performed.

As the constitution of the recording head, in addition to the combination constitution of the ejection port, the liquid passage, and the electrothermal converter (the linear liquid passage or the right-angled liquid passage) as disclosed in the above-mentioned respective specifications, The configurations using US Pat. No. 4,558,333 and US Pat. No. 4,459,600, which disclose the configuration in which the heat acting portion is arranged in the bending region, are also effective in the present invention. In addition, Japanese Unexamined Patent Publication No. 59-123670 discloses a configuration in which a common slit is used as a discharge portion of the electrothermal converter for a plurality of electrothermal converters, and an opening for absorbing a pressure wave of thermal energy is provided. The present invention is also effective as a configuration based on Japanese Patent Application Laid-Open No. 59-138461, which discloses a configuration corresponding to the ejection portion.

Further, although the serial type ink jet recording apparatus is shown in the embodiment, the present invention can be effectively applied to a full line type recording head having a length corresponding to the maximum recordable width. As a full-line type recording head, by a combination of a plurality of recording heads as disclosed in the above-mentioned specification, either a constitution that satisfies the length or a constitution as one recording head integrally formed Although good, the present invention can exert the above-mentioned effects more effectively.

Further, it is preferable to add recovery means for the recording head and preliminary auxiliary means provided as a constitution of the ink jet recording apparatus of the present invention because the effects of the present invention can be further stabilized. Specific examples thereof include capping means, cleaning means, pressurization or suction means, an electrothermal converter or a heating element other than this, a preheating means for the recording head, and a recording head for the recording head. It is also effective to perform a preliminary ejection mode in which another ejection is performed for stable recording.

Regarding the recording head to be mounted and the kind or number of inks, for example, a single color ink and 1
In addition to the one provided with a plurality of recording heads, a plurality of heads may be provided corresponding to a plurality of inks having different recording colors and densities, and any combination is effective. The present invention is effective not only as a recording mode of black or the like as a recording mode of the recording apparatus but also in a full-color recording mode of different colors or mixed colors.

In the embodiments of the present invention described above, the ink is described as a liquid, but it is an ink that solidifies at room temperature or lower and that softens or melts at room temperature, or the above-mentioned ink jet. Generally, the temperature of the ink itself is adjusted in the range of 30 ° C. to 70 ° C. to control the temperature of the ink so that the viscosity of the ink is in a stable ejection range. If it is good. In addition, in order to prevent temperature rise due to thermal energy, use ink that is positively used as energy for phase change from solid state to liquid state, or use ink that solidifies in the left state for the purpose of preventing ink evaporation. However, in any case, by applying heat energy such as ink that is liquefied by applying heat energy according to a recording signal and is ejected as an ink liquid or that has already started to solidify when it reaches a recording medium. The use of an ink having a property of liquefying for the first time is also applicable to the present invention. In such a case, the ink is disclosed in
4-56847 or JP-A-60-71260
As described in Japanese Patent Laid-Open Publication No. JP-A-2003-115, it may be configured to face the electrothermal converter in a state of being held as a liquid or a solid in the porous sheet recess or through hole. In the present invention, the most effective one for each of the above-mentioned inks is to execute the above-mentioned film boiling method.

Further, the present invention is an ink jet system such as a piezo jet system in which electricity is converted into a force to eject ink, and a recording system in which a recording head is disposed in non-contact with a recording medium and ink is ejected for recording. Is effective in.

[0059]

As described above, the present invention makes it difficult for ink to leak due to the flow path resistance of the filter when the recording head is in a single state, and prevents ink leakage when the ink tank is replaced.

Further, in the state of the recording head alone, it is possible to reduce the evaporation of ink from the end face of the ink flow path,
Discharge failure can be prevented.

Further, even if dust or the like adheres to the filter portion and the flow of ink becomes poor, since the filter is at the end portion, the dust can be cleaned and removed, and the recording head can be used again and recording can be performed. It can be used for the life of the head, improving the economy.

[Brief description of drawings]

FIG. 1 is a sectional view showing a first embodiment of the present inkjet recording apparatus.

FIG. 2 is a schematic perspective view showing a partially enlarged view of the first embodiment.

FIG. 3 is a schematic perspective view showing a partially enlarged view of the first embodiment.

FIG. 4 is a perspective view of the entire recording apparatus showing the first embodiment of the present inkjet recording apparatus.

FIG. 5 is a perspective view showing an information device to which the present inkjet recording device is applied.

FIG. 6 is a block diagram of an electric circuit of an information device to which the present inkjet recording device is applied.

FIG. 7 is a flowchart showing a recording operation of the first embodiment.

FIG. 8 is a sectional view showing a second embodiment.

FIG. 9 is a sectional view showing a third embodiment.

FIG. 10 is a sectional view showing a tenth embodiment.

FIG. 11 is a sectional view showing an eleventh embodiment.

FIG. 12 is a sectional view of a recording head and an ink tank showing a conventional example.

[Explanation of symbols]

 1 Recording Head 2 Ink Tank 3 Filter 4 Valve 7 Ink Ejection Section 10 Ink Supply Port 11 Ink Supply Port

Claims (3)

[Claims] 1. A recording head having a liquid ejection section for ejecting ink to perform recording, a flow path coupling section joined to an ink tank and receiving ink supply from the ink tank, and a recording head detachable from the recording head. An inkjet recording apparatus having an ink tank and a mounting section on which the recording head is mounted, the inkjet recording apparatus having a filter section provided at an end of the flow path coupling section. 2. A liquid ejecting section for ejecting ink to perform recording, and a flow path coupling section connectable to an ink tank and supplied with ink from the ink tank, wherein an end portion of the joint section is provided. An ink jet recording head, characterized in that a filter portion is arranged in the. 3. An ink jet head cartridge comprising: the ink jet recording head according to claim 2; and an ink tank that is connected to the flow path connecting portion and supplies ink to the recording head.