JP3171102B2 - Printer and ink tank - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ink jet printer and an ink tank for supplying ink to a recording head in the printer.
In particular, the present invention relates to a printer and an ink tank in which a user can attach and detach an ink tank to replace it.

[0002]

2. Description of the Related Art Conventionally, in an ink jet printer, a user replaces and mounts an ink tank. In such a printer, there is a known problem that when a user performs an ink tank replacement operation, bubbles are drawn into the ink flow path, and the drawn bubbles cause ink ejection failure and deteriorate image quality. Have been.

As one of the solutions, it is effective to provide an ink reservoir in a joint portion instead of directly supplying ink from an ink impregnated member provided in an ink tank and holding ink. However, in this configuration,
Ink leakage at the joint occurs as a problem.

As a structure for preventing ink leakage at the joint portion, for example, as disclosed in Japanese Patent Application Laid-Open No. 3-92356, an ink outlet of an ink tank is constituted by a rubber stopper, and the rubber stopper is provided with a metallic material. A configuration is known in which the ink supply needle is penetrated and directly connected to an ink flow path to a recording head in a liquid manner. The ink supply needle in this configuration uses a pipe having corrosion resistance to ink. The tip of the pipe is formed to be extremely sharp so that a rubber stopper can penetrate. Is provided. Liquid connection is possible with such an ink supply needle, the ink supply port of the ink tank is closed by the elastic force of the rubber stopper, and the ink does not leak. However, careless handling touched the sharp end of the pipe, causing a problem of injury. Further, since the ink supply needle itself has a small inner diameter, a broken piece of a rubber stopper that has penetrated into the ink supply needle has a problem that the ink supply is hindered.

As another solution, for example, Japanese Patent Laid-Open No. 7-1
As disclosed in Japanese Patent No. 25238, there is a structure in which an ink outlet is constituted by a two-stage ring and a supply port seal. With this configuration, the metal ink supply needle does not penetrate the rubber stopper, so the danger of the rubber stopper fragments being mixed was reduced, but a sharp pipe still had to be used, and He had the problem of being injured when touched.

As a structure not using such a sharp pipe, for example, as described in Japanese Patent Application No. 6-272747, a joint between a meniscus forming member on the ink tank side and a filter on the recording head side is used. There is a configuration in which a porous material is put between them. In this configuration, an ink flow path is formed by contact between the porous material and the filter or between the meniscus forming member and the porous material. According to this configuration, it is safe because dangerous parts such as needles are not used, and since the joint portion is filled with a porous material, mixing of air into the ink flow path can be reduced. Can be.

However, in this configuration, since the porous material is pressed and deformed at the joint to connect the recording head and the ink tank, the meniscus forming member provided on the ink tank side is peeled off by the pressing force at the time of connection. There was a possibility. If the meniscus forming member of the joint part comes off, the ink in the ink tank leaks from the joint part when the ink tank is removed, and the inside of the printer and the periphery of the printer become dirty. In addition, there is a problem that it cannot be used again.

[0008]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned circumstances, and does not cause air bubbles to enter the inside of the flow path at the time of replacing the ink tank, does not cause ink leakage, and is used by the user. It is an object of the present invention to provide a printer and an ink tank in which an ink tank can be attached and detached any number of times, while avoiding the danger that the ink tank is exposed at the time of replacement.

[0009]

According to a first aspect of the present invention, there is provided a recording head for discharging an ink liquid, and an ink tank for holding the ink liquid to be supplied to the recording head in an ink chamber capillary member. In a printer in which the ink introduction section of the recording head section and the ink tank are connected at a joint section, the printer is built in the joint section, and one surface is facing the ink introduction section side of the recording head section. A coupling capillary member to which ink is supplied from the other surface side to the one surface side; and the other side for receiving a pressing force applied to the coupling portion capillary member when the ink tank is connected to the recording head unit. And a holding portion for holding the coupling portion capillary member from the surface of (1).

According to a second aspect of the present invention, in the printer according to the first aspect, the pressing portion is integrally formed as a part of the ink tank.

According to a third aspect of the present invention, in the printer according to the first aspect, the pressing portion is formed of a member different from the ink tank.

According to a fourth aspect of the present invention, there is provided the printer according to the first aspect, further comprising an elastic member surrounding a periphery of the connecting portion capillary member.

According to a fifth aspect of the present invention, there is provided the printer according to the first aspect, further comprising a resin component that sandwiches the periphery of the connecting portion capillary member.

According to a sixth aspect of the present invention, in the printer according to the fifth aspect, the resin component is formed integrally with the holding portion.

According to a seventh aspect of the present invention, in the printer according to the first aspect, a felt, which is a three-dimensionally arranged fiber aggregate, is used as a material of the capillary part of the connecting portion. Things.

According to an eighth aspect of the present invention, in the printer according to the first aspect, a non-woven fabric is used as a material of the connecting portion capillary member.

According to a ninth aspect of the present invention, in the printer according to the first aspect, as the material of the connecting portion capillary member, a porous body including a large number of three-dimensionally substantially uniform holes is used. It is characterized by the following.

According to a tenth aspect of the present invention, there is provided an ink tank which is connected to an ink introduction portion of a recording head portion at a joint portion, holds ink liquid in an ink chamber capillary member, and supplies the ink liquid to the recording head portion. A coupling capillary member that is built in the joint portion, one surface of which faces the ink introduction portion side of the recording head portion, and ink is supplied from the other surface side to the one surface side; The ink jet recording apparatus further includes a pressing portion that presses the coupling portion capillary member from the other surface to receive a pressing force applied to the coupling portion capillary member when the ink tank is connected to the recording head portion.

According to an eleventh aspect of the present invention, in the ink tank according to the tenth aspect, the pressing portion is integrally formed as a part of the ink tank.

According to a twelfth aspect of the present invention, in the ink tank according to the tenth aspect, the pressing portion is formed of a member different from the ink tank.

According to a thirteenth aspect of the present invention, in the ink tank according to the tenth aspect of the present invention, the ink tank further comprises an elastic member surrounding a periphery of the capillary portion of the connecting portion.

According to a fourteenth aspect of the present invention, in the ink tank according to the tenth aspect, there is further provided a resin component for sandwiching the periphery of the connecting portion capillary member.

According to a fifteenth aspect of the present invention, in the ink tank according to the fourteenth aspect, the resin component is formed integrally with the holding portion.

According to a sixteenth aspect of the present invention, in the ink tank according to the tenth aspect, a felt, which is a three-dimensionally arranged fiber aggregate, is used as the material of the joint capillary member. Is what you do.

According to a seventeenth aspect of the present invention, in the ink tank according to the tenth aspect, a non-woven fabric is used as a material of the connecting portion capillary member.

According to an eighteenth aspect of the present invention, in the ink tank according to the tenth aspect, a porous body containing a large number of three-dimensionally substantially uniform pores is used as a material of the connecting portion capillary member. It is characterized by the following.

[0027]

FIG. 1 is a sectional view of a main part of an embodiment of a printer and an ink tank according to the present invention, and FIG. 2 is a perspective view of the same main part. In the figure, 1 is an ink tank, 2
Is a joint section, 3 is a recording head, 4 is an ink introduction section,
11 is a main ink chamber, 12 is an ink chamber capillary member, 13 is an air communication port, 14 is a meniscus forming member, 15 is an ink guide member, 16 is an intermediate chamber, 17 is a pressing portion, 18 is a coupling portion capillary member, and 19 is a connecting portion capillary member. An outer peripheral portion of the joint, 20 is an ink guide holding member, 21 is a joining member, 22 is a filter, and 23 is an ink flow path. 1 and 2 show a state before the ink tank 1 is mounted. 1 and 2
1 shows a configuration in which the recording head 3 is mounted on the printer, and the ink tank 1 is mounted on the recording head 3, and only the ink tank 1 and the ink flow path of the recording head 3 are illustrated. FIG. 2 shows one side wall of the ink tank 1 and the ink chamber capillary member 12 removed.

The ink tank 1 is connected to the recording head 3 at a joint 2. When the joint 2 of the ink tank 1 comes into contact with the ink introduction section 4 of the recording head 3, the ink flow path is connected, and the ink is supplied from the ink tank 1.

The main ink chamber 1 is provided inside the ink tank 1.
1, and an intermediate chamber 16 is provided below it. Inside the main ink chamber 11, an ink chamber capillary member 12 is arranged. The ink chamber capillary member 12 holds the ink by capillary force and maintains a negative pressure. At an upper portion of the main ink chamber 11, an air communication port 13 is provided which can communicate with the ink chamber capillary member 12 by air. A communication hole is provided below the main ink chamber 11 and communicates with the intermediate chamber 16. The ink chamber capillary member 12 communicates with the atmosphere at the upper part and is released from the atmospheric pressure. Therefore, at the time of supplying ink, the ink in the ink chamber capillary member 12 is pressed by the atmospheric pressure,
Further, the ink is drawn out from below the ink chamber capillary member 12 toward the intermediate chamber 16 by a negative pressure. Further, the bottom surface of the main ink chamber 11 is formed as a slope having the communication hole as the lowest part.

A meniscus forming member 14 having a large number of fine holes is arranged in a communication hole provided on the bottom surface of the main ink chamber 11. The bottom of the ink chamber capillary member 12 is pressed against the meniscus forming member 14 and arranged. When the ink is impregnated in the ink chamber capillary member 12, the ink passes through the meniscus forming member 14 and moves to the intermediate chamber 16. When the ink chamber capillary member 12 is depleted of ink, the meniscus of the ink stretched in the fine holes of the meniscus forming member 14 in contact with the ink chamber capillary member 12 is pushed by the atmospheric pressure, overcomes the surface tension, and passes through. The bubbles move to the intermediate chamber 16. Thereby, the supply pressure of the ink to the recording head 3 is kept below a certain value.

An ink guiding member 15 is provided below the meniscus forming member 14. Ink guide member 15
Are supported by an ink guide member retainer 20 protruding from a wall surface around the communication hole. Alternatively, a part of the meniscus forming member 14 may be used as the ink guiding member 15. The ink guide member 15 extends to the bottom of the intermediate chamber 16. Bubbles accumulate on the lower surface of the meniscus forming member 14 to form an air layer, or the intermediate chamber 1
When the ink level in ink 6 is lowered, the ink guiding member 1
5 sucks up the ink in the intermediate chamber 16 and supplies the ink to the meniscus forming member 14. Thereby, the meniscus forming member 14 is always kept in a wet state, and the negative pressure is maintained. Further, the ink supply pressure can be maintained at the best state until the ink is used up.

The intermediate chamber 16 has a portion extending above the communication hole. In FIG. 1, the upper wall of the intermediate chamber 16 is inclined so that the peripheral portion of the intermediate chamber 16 is higher than the communication hole. The intermediate chamber 16 accumulates air bubbles that have entered through the meniscus forming member 14 and the connecting portion capillary member 18 in a portion higher than the peripheral communication hole, and prevents air bubbles from entering the recording head 3 from the joint portion 2. To prevent air remaining in the joint.

At the bottom of the intermediate chamber 16, a joint 2 for connecting to the recording head 3 is provided.
The joint outer peripheral portion 19 of the joint portion 2 is formed with a flat surface so that the joining member 21 provided on the recording head 3 can easily come into contact.

The joint portion 2 is provided with a connecting portion capillary member 18 so as to cover the ink supply port, and is pressed from the inside of the ink tank 1 by the pressing portion 17. Details of this part will be described later. In a state where the ink tank 1 is removed and left as it is, the ink in the intermediate chamber 16 does not leak from the joint portion 2 due to the capillary force of the connecting portion capillary member 18. When the ink tank 1 is mounted, the ink tank 1 functions as a filter, and prevents vibration and impact applied to the ink tank 1, pressure fluctuation due to acceleration, and air bubbles from the nozzle side of the recording head 3.

As the connecting portion capillary member 18, for example, the same material as the meniscus forming member 14 can be used. Specifically, a stainless steel mesh filter having a filtration particle size of 40 microns or the like can be used. it can. Alternatively, fibrous felt or the like can be used, and polyester, acryl, polypropylene, or the like can be used as the material of the felt. Alternatively, a nonwoven fabric, a sponge, or the like may be used.

On the other hand, the recording head 3 is connected to the joint 2 of the ink tank 1 at the ink introduction section 4.
A joining member 21 is arranged around the ink introduction unit 4. When the ink tank 1 is mounted, the joining member 21 abuts and deforms on the surface of the joint outer peripheral portion 19 of the ink tank 1 to seal the joint. Thereby, it is possible to prevent the leakage of the ink from the joint. Joining member 2
As the first material, for example, silicon rubber, butyl rubber, or the like can be used. It is also possible to configure without providing the joining member 21. Also, Japanese Patent Application No. 7-040
No. 937, as described in FIGS.
A protrusion is provided on the outer peripheral portion 19 of the joint of the ink tank 1,
Further, even when a gasket is provided around the ink introduction unit 4 and the protrusion on the ink tank 1 side is brought into contact with the gasket on the recording head 3 side, the airtightness of the joint can be improved.

At the tip of the ink introduction section 4, a filter 22
Is arranged. The filter 22 is provided to prevent dust or the like adhering to the ink introduction unit 4 from being mixed into the ink flow path 23 when the ink tank 1 is removed. In addition, the ink is held by the meniscus of the ink formed in the minute holes of the filter 22, thereby preventing the ink from flowing out of the nozzles. As a material of the filter 22, for example, a stainless steel mesh filter having a filtration particle size of 5 to 60 microns can be used. As other materials, for example, a ceramic filter or the like can be used. Specifically, for example, a stainless steel mesh filter having a filtration particle size of 20 microns can be used.

FIGS. 3A and 3B are enlarged views showing a first specific example of the joint portion. FIG. 3A is a top view, FIG. 3B is a cross-sectional view, and FIG. 3 (D) is a perspective view showing a part of the holding portion, and FIG. 3 (E) is an exploded perspective view. In the figure, 31 and 32 are guides. In the example shown in FIG. 3, as shown in FIG.
The cover is sandwiched by a guide 32 and is attached to the joint 2 from outside the ink tank 1. The holding part 17 is formed in the joint part 2 and the guide 3
When the assembly of the capillary members 1 and 32 and the connecting portion capillary member 18 is attached to the joint portion 2, the pressing portion 17 comes into contact with the surface of the connecting portion capillary member 18.

The guides 31, 32 can be formed of resin. As the material of the resin, for example, polypropylene can be used. Of course, other materials may be used. For example, when polypropylene is used for the guides 31 and 32, the two can be bonded by heat fusion after sandwiching the joint capillary member 18.

The holding portion 17 is formed integrally with the member at the bottom of the ink tank in this example. Ink tank 1
Since the bottom member is made of, for example, a resin, the holding portion 17 can be formed when the housing is molded. The pressing portion 17 can be formed as a rib-shaped arm as shown in FIGS. 3 (A) and 3 (D). In order to obtain an elastic force, polypropylene, polycarbonate, ABS, or the like is suitable as the material of the ink tank 1. It goes without saying that other materials may be used. When a pressing force is applied to the pressing portion 17, the pressing portion 17 is elastically deformed as shown by an arrow in FIG.

In FIG. 3, four arm-shaped portions are formed as the holding portions 17, but the number and shape are arbitrary and can be changed as appropriate. For example, it may be configured with three or five or more. Further, in FIG. 3, the tip portion is thin and bent, but may be a shape extending straight.

FIG. 4 is a cross-sectional view showing a state before and after connection with a recording head in the first specific example of the joint portion. When the ink tank 1 is mounted on the recording head 3, the joint 2 of the ink tank 1 comes into contact with the ink introduction unit 4 of the recording head 3. By this contact, the connecting portion capillary member 18 and the filter 22 come into contact with each other to form an ink flow path. At this time, the air remaining between the connection portion capillary member 18 and the filter 22 is very small and is removed by, for example, suction during maintenance. In addition, the connecting portion capillary member 18
Also, ink does not leak from the joint due to the capillary force of the filter 22.

When the connecting portion capillary member 18 and the ink introducing portion 4 come into contact with each other, the connecting portion capillary member 18 is slightly pressed by the ink introducing portion 4 as shown in FIG. Deforms inward. Since the pressing portion 17 presses the connecting portion capillary member 18 from the surface of the connecting portion capillary member 18 opposite to the surface where the ink introduction portion 4 abuts, the pressing portion 17 is also elastically deformed. As described above, the connection portion capillary member 1
8 is pressed by the elastic force of the pressing member 17, even if it is pressed, the connecting portion capillary member
Does not occur due to the pressing force, and the joining portion is stabilized.

FIG. 5 is an enlarged view showing a second specific example of the joint portion, FIG. 5 (A) is a top view, and FIG. 5 (B) is a sectional view. In the figure, 41 and 42 are guides. In addition,
The bottom view and the configuration of one arm of the holding part are shown in FIG.
Since it is the same as (D), it is omitted here. In this specific example, the holding portion 17 is formed integrally with the guide 41, and is a member different from the member at the bottom of the ink tank. This configuration is effective when the member at the bottom of the ink tank is formed of a material having no elasticity. As a material of the pressing portion 17 for giving the pressing portion 17 an elastic force, polypropylene, polycarbonate, a metal spring material, or the like can be used. FIG. 6 is an enlarged view showing a modification of the second specific example of the joint portion. In FIG. 6, the pressing portion 17 is formed by using a sheet metal made of a metal spring material as the guide 41. In this case, there is no need to provide a seal between the member at the bottom of the ink tank and the guide 41. of course,
It goes without saying that other materials may be used. Further, the shape and number of the holding portions 17 are also the same as those of the first embodiment.
Modifications similar to those of the above example are possible.

In the second embodiment shown in FIGS. 5 and 6, an elastic member such as rubber or elastomer is used for the guide 42.
The connecting portion capillary member 18 is sandwiched between guides 42. This method is effective when the connecting portion capillary member 18 is made of a relatively hard material. Since the guide 42 is an elastic member, it is possible to easily seal the periphery of the connecting portion capillary member 18. Of course, similarly to the first specific example described above, the guide 41 may be made of resin or the like and adhered thereto.

FIG. 7 is a sectional view showing a state before and after connection to a recording head in the second specific example of the joint portion. In the figure, reference numeral 51 denotes a projection. When the ink tank 1 is mounted on the recording head 3, the joint 2 of the ink tank 1 comes into contact with the ink introduction unit 4 of the recording head 3. Then, as shown in FIG. 7 (B), the connecting portion capillary member 18 is slightly pressed by the ink introduction portion 4 and deforms to the inside of the ink tank 1. Since the pressing portion 17 provided on the guide 41 presses the coupling portion capillary member 18 from the surface of the coupling portion capillary member 18 opposite to the surface that the ink introduction portion 4 abuts, the pressing portion 17 is also elastically deformed. As described above, even when the connecting portion capillary member 18 is pressed, the connecting portion capillary member 18 is pressed by the elastic force of the pressing member 17, so that there is no problem that the connecting portion capillary member 18 is detached by the pressing force as in the related art. In addition, since the connecting portion capillary member 18 is held by the guide 42 formed of an elastic member, even if the connecting portion capillary member 18 is deformed, it is well sealed, and ink from around the connecting portion capillary member 18 is removed. There is no leakage.

When the guide 42 is formed of an elastic member, a structure is also adopted in which a projection 51 is provided around the ink introduction section 4 on the recording head 3 side, and the projection 51 contacts the guide 42 when the ink tank is mounted. it can. With this structure, it is possible to further increase the airtightness of the joining portion, and it is possible to define the intrusion stroke of the ink introduction portion 4 on the recording head 3 side. In this case, the joining member 21 need not be provided in the recording head 3.

FIG. 8 is an enlarged view showing a third specific example of the joint portion. FIG. 8A is a top view, and FIG. 8B is a sectional view. In the figure, 61 and 62 are guides. In the third specific example, similarly to the above-described second specific example, the pressing portion 17 is formed of the same member as the guide 41. The configuration in which the connecting portion capillary member 18 is sandwiched between the guides 61 and 62 is the same as in the first specific example. In the third specific example, the holding portion 17 has, for example, a spiral structure. Such a structure can be easily formed when the guide 61 is formed.

FIG. 9 is a cross-sectional view showing a state before and after connection with a recording head in a third specific example of the joint portion. When the ink tank 1 is mounted on the recording head 3, the connecting portion capillary member 18 comes into contact with the ink introduction portion 4 of the recording head 3 and is slightly deformed. At this time, since the connecting portion capillary member 18 is pressed from the inside of the ink tank 1 by the elastic force of the spiral pressing portion 17, the connecting portion capillary member 18 does not come off due to the pressing force of the ink introduction portion 4.

FIG. 10 is an enlarged view showing a fourth specific example of the joint portion. FIG. 10 (A) is a top view and FIG.
(B) is a sectional view. In this example, the holding portion 17 is configured not as a projection but as a rough mesh. As described above, a configuration in which one or more holes smaller than the coupling part capillary member 18 may be provided at positions corresponding to the coupling part capillary member 18.

FIG. 11 is an enlarged view showing a fourth specific example of the joint portion. FIG. 11 (A) is a top view and FIG.
(B) is a sectional view. In this example, in the second specific example described above, the guide 42 is formed by an elastic member, and the guide 42 is not provided. In this example, the guide 42 itself is used as the holding portion 17. In this case, there is no arm-shaped or spiral-shaped projection as in each of the above-described examples, and the guide 42 presses the coupling portion capillary member 18 from the surroundings, and the pressing force of the coupling portion capillary member 18 is reduced by the elastic force of the guide 42. It becomes a structure to absorb.

The above-described specific examples can be used in appropriate combinations. Further, the configuration of the ink tank is not limited to the above-described example. The invention can be applied.

[0053]

As is apparent from the above description, according to the present invention, in a configuration in which the ink tank is detachable, no air bubbles are mixed into the ink flow path when the ink tank is mounted, and ink leakage occurs. In addition, a structure that avoids the danger that the user is exposed at the time of replacement is realized.
Further, the connecting portion capillary member provided at the joint portion receives the pressing force applied to the connecting portion capillary member at the time of connection between the ink tank and the recording head portion, and thus is pressed from the surface of the recording head portion opposite to the ink introduction portion side. Since the configuration is such that the capillaries can be held down, there is an effect that it is possible to prevent a problem that the connecting portion capillary member is disengaged by the pressing force when the ink tank is mounted.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part of an embodiment of a printer and an ink tank according to the present invention.

FIG. 2 is a perspective view of a main part of an embodiment of the printer and the ink tank according to the present invention.

FIG. 3 is an enlarged view showing a first specific example of a joint portion.

FIG. 4 is a cross-sectional view showing a state before and after connection with a recording head in a first specific example of a joint portion.

FIG. 5 is an enlarged view showing a second specific example of the joint section.

FIG. 6 is an enlarged view showing a modification of the second specific example of the joint portion.

FIG. 7 is a cross-sectional view showing a state before and after connection with a recording head in a second specific example of the joint section.

FIG. 8 is an enlarged view showing a third specific example of the joint portion.

FIG. 9 is a cross-sectional view showing a state before and after connection with a recording head in a third specific example of the joint portion.

FIG. 10 is an enlarged view showing a fourth specific example of the joint part.

FIG. 11 is an enlarged view showing a fourth specific example of the joint portion.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Ink tank, 2 ... Joint part, 3 ... Recording head, 4 ... Ink introduction part, 11 ... Main ink chamber, 12 ... Ink chamber capillary member, 13 ... Atmospheric communication port, 14 ... Meniscus forming member, 15 ... Ink guide Member, 16 ... Intermediate chamber, 17 ...
Pressing part, 18 ... connecting part capillary member, 19 ... joint outer peripheral part, 20 ... ink guide member pressing, 21 ... joining member,
22: filter, 23: ink flow path, 31, 32, 4
1, 42, 61, 62: guide, 51: protrusion.

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-5-96745 (JP, A) JP-A-63-9547 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B41J 2/175

Claims (18)

(57) [Claims] A recording head for discharging an ink liquid;
A printer having an ink tank for holding the ink liquid in an ink chamber capillary member for supplying the ink liquid to the recording head section, wherein the ink introduction section of the recording head section and the ink tank are connected at a joint section; A coupling capillary member, one of which faces the ink introduction unit side of the recording head unit and ink is supplied from the other surface to the one surface side, and the ink tank, A printer, comprising: a pressing portion for pressing the coupling portion capillary member from the other surface to receive a pressing force applied to the coupling portion capillary member when the recording head portion is connected. 2. The ink jet printer according to claim 1, wherein the pressing portion is integrally formed as a part of the ink tank.
Printer according to. 3. The printer according to claim 1, wherein the pressing portion is formed of a member different from the ink tank. 4. The printer according to claim 1, further comprising an elastic member surrounding the periphery of the connecting portion capillary member. 5. The printer according to claim 1, further comprising a resin component for sandwiching a periphery of the coupling portion capillary member. 6. The printer according to claim 5, wherein the resin component is formed integrally with the holding portion. 7. The printer according to claim 1, wherein a felt, which is a three-dimensionally arranged fiber aggregate, is used as a material of the joint capillary member. 8. The printer according to claim 1, wherein a non-woven fabric is used as a material of the connection portion capillary member. 9. The printer according to claim 1, wherein a porous body containing a large number of three-dimensionally substantially uniform holes is used as a material of the connecting portion capillary member. 10. An ink tank connected to an ink introduction section of a recording head section at a joint section, holding ink liquid in an ink chamber capillary member, and supplying the ink liquid to the recording head section. A coupling capillary member having one surface facing the ink introduction portion side of the recording head portion, and ink being supplied from the other surface to the one surface side; the ink tank and the recording head portion; An ink tank having a pressing portion for pressing the coupling portion capillary member from the other surface to receive a pressing force applied to the coupling portion capillary member at the time of connection. 11. The ink tank according to claim 10, wherein the pressing portion is integrally formed as a part of the ink tank. 12. The ink jet printer according to claim 10, wherein the pressing portion is formed of a member different from the ink tank.
The ink tank according to any one of the above. 13. The ink tank according to claim 10, further comprising an elastic member that surrounds the periphery of the connection portion capillary member. 14. The apparatus according to claim 10, further comprising a resin component sandwiching the periphery of said coupling portion capillary member.
The ink tank according to any one of the above. 15. The ink tank according to claim 14, wherein the resin component is formed integrally with the holding portion. 16. The ink tank according to claim 10, wherein a felt, which is a three-dimensionally arranged fiber aggregate, is used as the material of the capillary part of the connection part. 17. The ink tank according to claim 10, wherein a non-woven fabric is used as a material of the capillary member of the connection portion. 18. The ink tank according to claim 10, wherein a porous body containing a large number of three-dimensionally substantially uniform holes is used as a material for the connecting portion capillary member.