JPH09109411A - Ink jet printer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To hold constant fusing strength without generating the irregularity in the fusion strength of the ink filter fused to the end surface of an ink introducing part and to prevent the peeling or damage of the ink filter even when a porous member is brought into contact with the ink filter when the end surface of the ink introducing part is fitted in the ink supply hole of an ink cartridge. SOLUTION: At a time of the thermal fusion of an ink filter 31 to the end surface 30A of an ink introducing part 28, a region R high in fusion strength thermally bonded to the end surface 30A along the mesh direction G of weft yarns of an ink filter 31 having a will weave structure is formed by inserting the ink introducing part 28 in the ink supply hole 23 of an ink cartridge 11 to set the ink cartridge 11 to a head holder 10. At this time, the end surface 30A is thermally fused so as to be arranged at the position coinciding with the press position pressing a porous member 22 or the vicinal position partially overlap with said press position.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention fits an ink introducing portion formed on a head mounting member provided with an ink jet head into an ink supply hole of an ink cartridge containing a porous body impregnated with ink, The present invention relates to an inkjet printer that prints various types of information while supplying ink from an ink cartridge to an inkjet head through an ink introduction part, and in particular, it is constant without causing variations in the welding strength of an ink filter that is welded to the end face of the ink introduction part. It is possible to maintain the welding strength of the ink filter, and even when the porous body and the ink filter come into contact with each other when the end surface of the ink introducing portion is fitted into the ink supply hole of the ink cartridge, the ink filter may be peeled off. The present invention relates to an inkjet printer that can prevent damage. .

[0002]

2. Description of the Related Art Conventionally, various ink jet printers have been proposed. In this kind of printer, a resin head mounting member (head holder) on which an ink jet head is disposed is provided, and a front surface of the head mounting member is provided. Is attached with an ink jet head, and an ink introducing portion for introducing ink into the ink jet head is formed on the rear surface of the head attaching member. Further, the ink introducing portion has an ink containing a porous body impregnated with ink. The ink supply hole of the cartridge is fitted, and printing is performed while supplying ink from the ink supply hole of the ink cartridge to the ink jet head through the ink introduction section. In addition, the end surface of the ink introduction part that fits into the ink supply hole of the ink cartridge has a heat filter to prevent dust and the like from entering the ink discharge nozzles of the inkjet head and bubbles. It is welded.

As such an ink filter, in general,
A filter formed by so-called twill weaving a warp yarn and a weft yarn made of a metal fiber (for example, a metal fiber such as SUS) is used. This type of filter has a warp structure because of its weaving structure. There are eye direction and weft thread direction.

In the conventional ink jet printer, the ink filter constructed as described above is heat-welded to the end face of the ink introducing portion of the ink mounting member. At the time of heat-welding, especially, the direction of the warp yarns and the weft yarns. It is the current situation that they are welded without considering the direction of the eyes.

[0005]

By the way, in the ink filter as described above, the ink filter of the ink filter is formed on the basis of the relationship existing between the direction of the stitches of the warp threads or the weft threads and the welding direction to the end surface of the ink introducing portion. It is considered that the welding strength with respect to the end surface of the ink introducing portion changes.

However, in the conventional ink jet printer described above, when the ink filter is heat-welded to the end face of the ink introducing portion of the head mounting member, there is nothing about the directionality of the warp or weft stitches that the ink filter has due to its woven structure. No consideration has been given to the fact that the ink filter is heat-welded to the end face of the ink introducing portion in a random state regardless of the warp and weft thread directions. Therefore, due to this, the welding strength of the ink filter with respect to the ink introduction portion varies, and as a result, it becomes extremely difficult to maintain a constant welding strength. As a result, there is a problem that when the ink introducing portion is fitted into the ink supply hole of the ink cartridge, the porous body and the ink filter come into contact with each other in a pressed state and the ink filter may be peeled off or damaged. is there.

Therefore, as a result of various studies, the present inventor has made various studies while paying attention to the relationship existing between the direction of the warp or weft of the ink filter and the direction of welding to the end surface of the ink introducing portion. The present invention has been completed by finding that the welding strength becomes constant and improved when the end surface of the ink introducing portion is welded along the weft thread direction.

Therefore, the present invention has been made to solve the above-mentioned conventional problems, and maintains a constant welding strength without causing variations in the welding strength of the ink filter to be welded to the end face of the ink introducing portion. It is possible to prevent the ink filter from being peeled off or damaged even when the porous body and the ink filter come into contact with each other when the end surface of the ink introduction portion is fitted into the ink supply hole of the ink cartridge. It is an object of the present invention to provide an inkjet printer capable of performing the above.

[0009]

In order to achieve the above object, an ink jet printer according to a first aspect of the present invention includes an ink jet head, a head mounting member to which the ink jet head is mounted, a head mounting member, and an ink jet head. And an ink filter formed by twill-weaving a warp yarn and a weft yarn made of metal fiber, and an ink filter that is welded to the end face of the ink introduction portion, and is impregnated with ink. With a built-in porous body, ink supply holes are formed,
In an ink-jet printer having an ink cartridge in which an end surface of an ink introduction portion is pressed while pressing a porous body through an ink supply hole, the ink filter is configured such that the end surface of the ink introduction portion presses the porous body. At the position or in the vicinity thereof, it is welded to the end face of the ink introducing portion along the direction of the weft threads.

In the ink jet printer according to claim 1 having the above-mentioned structure, the ink filter has a weft thread pattern at the pressing position where the end face of the ink introducing part presses the porous body or in the vicinity thereof. Is welded to the end surface of the ink introducing portion along the direction, and as a result, the welding strength between the ink filter and the end surface of the ink introducing portion is kept constant as compared with the case of welding along the direction of the warp threads. In addition, it is possible to improve the welding strength at the pressing position where the end surface of the ink introducing portion presses the porous body or in the vicinity thereof. Therefore, even when the porous body and the ink filter come into contact with each other when the end surface of the ink introduction portion is fitted into the ink supply hole of the ink cartridge, it is possible to reliably prevent the ink filter from being peeled off or damaged. Is something that can be done.

An ink jet head according to a second aspect of the present invention is configured by weaving an ink jet head, an ink introduction portion provided with an ink introduction hole for introducing ink into the ink jet head, and a warp thread and a weft thread of thin metal wires.
An ink cartridge having an ink filter welded to the end surface of the ink introducing portion and containing a porous body impregnated with ink, the end surface of the ink introducing portion by inserting the ink introducing portion into the ink supply hole of the ink cartridge. In an ink jet printer to be mounted while pressing the porous body with, the ink filter, the weft yarns are configured with a finer pitch than the warp yarns, the end face of the ink introduction portion at the pressing position or the vicinity thereof to press the porous body. , Has a configuration arranged in a direction along the eye of the weft thread.

In the ink jet printer having the above structure, the ink filter may be arranged in a direction along the eyes of the weft thread having a fine pitch at the pressing position where the end surface of the ink introducing portion presses the porous body or in the vicinity thereof. It is arranged so that the end surface of the ink introducing portion can improve the welding strength at the pressing position where the porous body is pressed or in the vicinity thereof, and when the ink cartridge is attached to the ink introducing portion, It is possible to prevent the ink filter from being peeled off or damaged even if it comes into contact with the ink filter.

An ink jet printer according to a third aspect is the ink jet printer according to the second aspect,
In the ink filter, the weft thread is made of a line thinner than the warp thread. In the inkjet printer of claim 3,
The weft yarn is formed of a finer line than the warp yarn, and the welding strength can be further improved in combination with the fine pitch configuration.

An ink jet printer according to a fourth aspect is the ink jet printer according to any one of the first to third aspects, wherein the end faces of the ink introducing portion and the ink filter have a warp thread and a weft thread of the ink filter in a predetermined direction. It is formed in a shape that can be attached to each other so as to face each other.

[0015] In the ink jet printer of the fourth aspect,
The end surface of the ink introducing portion and the ink filter are formed in a shape that is attached to each other so that the warp threads and the weft threads of the ink filter are oriented in a predetermined direction, and the weft thread that can improve the welding strength as described above. It can be installed in the correct direction. Further, the ink jet printer according to a fifth aspect is the ink jet printer according to the fourth aspect, wherein the end surface of the ink introducing portion is formed in an elliptical shape having a long side portion, and the ink filter is long in the weft thread direction. It has a structure in which it is welded to the end face in a state of being matched with the side portion.

In the ink jet printer of claim 5,
The ink filter is welded to the elliptical end face in a state where the direction of the weft threads is aligned with the long side portion, which increases the welding area at the welded portion between the ink filter and the ink introducing portion, and Since a large welding force can be obtained, even when the porous body and the ink filter come into contact with each other when the end surface of the ink introducing portion is fitted into the ink supply hole of the ink cartridge, the ink filter is peeled or damaged. This can be prevented more reliably.

[0017]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an ink jet printer according to the present invention will be described in detail with reference to the drawings based on an embodiment embodying the present invention. First, a schematic configuration of the inkjet printer will be described with reference to FIG. FIG. 1 is an external perspective view of an inkjet printer.

In FIG. 1, the housing 2 of the printer 1
A platen 3 is provided therein so as to be rotatable in the direction of arrow A in FIG. 1, and a guide shaft 4 is provided along the platen 3. A carriage 5 is slidably attached to the guide shaft 4, and a belt 6 is attached to the carriage 5. The belt 6 is wound around the idle pulley 7 and the drive pulley 8. The drive pulley 8 is rotated by a drive motor 9, and the rotation of the drive pulley 8 moves the carriage 5 along the guide shaft 4 via the belt 6 in the direction of arrow B in FIG. A resin head holder 10 is mounted on the carriage 5 so as to face the platen 3, and the head holder 1
An ink cartridge 11 is mounted on the printer 0. An inkjet head 21 (see FIG. 3 and the like) is attached to the front surface of the head holder 10.

A plurality of ink channels (not shown) are formed in the ink jet head 21, and nozzles (not shown) are provided corresponding to the respective ink channels. Then, as described later, ink is supplied from the ink cartridge 11 to the inkjet head 21.

The printing paper 12 inserted into the housing 2 in the direction of arrow C in FIG. 1 from the rear of the printer 1 is conveyed in the direction of arrow D along the platen 3 and is ejected from the housing 2 of the printer 1. When the print paper 12 is conveyed to the platen 3, desired data is printed by ejecting ink by the inkjet head 21 (see FIG. 3) fixed to the head holder 10 as the carriage 5 moves. .

The head 2 on the left side of the platen 3 in FIG.
A cap 13 is provided at the non-printing position of No. 1, and a cap rubber 14 is attached to the cap 13 so as to be in close contact with the head 21. The cap 13 is attached to the head 21 so as to be movable in the direction of the arrow E in FIG. 1, and the cap 13 is moved by a moving means (not shown) to be brought into close contact with the cap rubber 14 as appropriate. Further, a connecting tube 15 is attached to the cap 13, and the connecting tube 15 is connected to a pump 16 as shown in FIG. A discharge tube 17 is connected to the pump 16 and the discharge tube 17
Is connected to a waste ink tank 19 containing an adsorbent 18. A flexible wiper blade 20 is provided between the platen 3 and the cap 13 at the non-printing position. The wiper blade 20 is attached so as to be movable in the arrow F direction in FIG. The wiper blade 20 normally stands by at a retracted position where it does not come into contact with the head 21, and at the time of wiping, it is moved to a forward position where it can be slidably contacted with the head 21 by a motor (not shown).

Next, the structures of the head holder 10 and the ink cartridge 11 set on the carriage 5 will be described with reference to FIGS. 2 to 6. Here, FIG. 2 shows the carriage 5, the head holder 10, and the ink cartridge 1.
1 is an exploded perspective view showing the ink cartridge 1 in a disassembled state, FIG. 3 is a side sectional view showing a state in which the ink cartridge 11 is set on the head holder 10, FIG. 4 is an enlarged sectional view showing an ink introducing portion, and FIG. Explanatory diagram schematically showing the weaving structure of
FIG. 6 is an explanatory view schematically showing a welded state of the ink filter on the end face of the ink introducing portion.

In FIG. 2 and FIG. 3, the ink cartridge 11 contains a porous body 22 impregnated with ink, and the front side (left side in FIG. 3) of the porous body 22.
An ink supply hole 23 is formed in the. Further, two positioning protrusions 24 (one positioning protrusion 24 is shown in FIG. 2) are provided at a lower position on the front surface side of the ink cartridge 11, and the positioning protrusions 24 are located in front of the head holder 10. Positioning hole 34 formed in wall 27
The ink cartridge 11 is fitted to the head holder 5
It is to be positioned on top. Further, the carriage 5 is provided on the rear surface side (the right surface side in FIG. 3) of the ink cartridge 11.
A recess 25 into which the cartridge mounting claw 40 formed in the rear wall 39 is fitted is formed, and an atmosphere communication hole 26 is formed above the recess 25.

An ink introducing portion 28 is integrally formed at a substantially central position of the front wall 27 of the head holder 10, and the ink introducing portion 28 has an ink introducing tube 29. The ink introduction tube 29 has one end (see FIG. 3).
An ink introduction hole 30 is formed from the middle (right end side) to the front wall 27, and ink is supplied from the porous body 22 to the inkjet head 21 through the ink introduction hole 30. A seal rubber (packing) 28A is attached around the ink introducing portion 28 on the front wall 27 side, and the seal rubber 28A is attached to the ink cartridge 1
This is for sealing the ink from the porous body 22 of the ink cartridge 11 so as to prevent the ink from leaking to the outside when the ink introduction portion 28 is inserted into the ink supply hole 23 when the ink cartridge 1 is set on the head holder 10. . Here, in the ink introducing portion 28, as shown in FIG. 4, the center line L1 and the center line L2 of the ink introducing hole 30 do not coincide with each other, and are eccentric by the eccentric amount l. This is because the thickness of the ink introducing tube 29 on the front wall 27 side is set so as to prevent a sink mark from being generated in the ink introducing portion 28 when integrally forming the ink introducing portion 28 with the head holder 10. Based on the need to thin.

The right end side of the ink introduction hole 30 has a shape that is slightly opened vertically, and the ink filter 31 is heat-welded to the entire end surface 30A by a heating tool, ultrasonic waves, or the like. The ink filter 31 is configured, for example, by twill-weaving warp yarns and weft yarns of thin metal wires made of SUS. Here, the ink filter 31
The structure of will be described with reference to FIG. As shown in FIG. 5, the ink filter 31 includes a warp thread 32 and a weft thread 33,
In the so-called twill weave structure, the eye direction of the weft thread 33 is indicated by an arrow G, and the eye direction of the warp thread 32 is indicated by an arrow H. Generally, the diameter of the warp thread 32 is larger than the diameter of the weft thread 33, and
The pitch P1 of the warp threads 32 is larger than the pitch P2 of the weft threads 33. The weft yarn 33 meanders between the warp yarns 32 every other one or more, and the adjacent weft yarns meander between different warp yarns in the same manner, thereby forming a filter in a woven form.

Next, how the ink filter 31 having the above-described structure is heat-welded to the end surface 30A of the ink introduction hole 30 will be described with reference to FIG. The direction G of the weft threads in the ink filter 31 is shown in FIG.

In the ink filter 31 having the above structure, even if the entire end surface 30A is heat-welded, the end surface 30
It has been confirmed by the present inventor that the welding force of the ink filter 31 with respect to A is not uniform throughout, and therefore, the inventor has found that the weft direction 33 of the weft thread 33 of the ink filter 31 is in the eye direction G.
When the relationship between the eye direction G of the weft thread 33 and the welding strength was examined, the area welded along the eye direction G of the weft thread 33 was welded more firmly than other areas. It was confirmed that

For example, in the example shown in FIG. 6 (A), in the ink filter 31, the weft thread 33 has the end face 30 in the eye direction G.
It is heat-welded in a horizontal state over the upper and lower sides of A, and in such a welded state, there are regions R welded along the eye direction G of the weft thread 33 (existing at two positions above and below the end face 30A,
It is confirmed that the ink filter 31 is most strongly welded to the end face 30A (indicated by diagonal lines). In this case, as will be described later, the upper region R is
When the ink introduction portion 28 is inserted into the ink supply hole 23 of the ink cartridge 11 and the ink cartridge 11 is set in the head holder 10, the end surface 30A has the porous body 22.
Align with the pressing position of pressing.

Further, in the example shown in FIG. 6B, in the ink filter 31, the direction G of the eye of the weft thread 33 is the end surface 30A.
Are heat-welded in a state in which they are slightly inclined with respect to the vertical direction, and in this welding state, similarly to the above, the region R (a slight deviation from the vertical position of the end face 30A is welded along the eye direction G of the weft thread 33). The ink filter 31 is most strongly welded to the end face 30A, but the upper region R is
When the ink introduction portion 28 is inserted into the ink supply hole 23 of the ink cartridge 11 and the ink cartridge 11 is set in the head holder 10, the end surface 30A has the porous body 22.
It exists in the vicinity of the position where it is partially overlapped with the pressing position for pressing.

According to an experiment by the inventor, the ink filter 31 is heat-welded to the end face 30A in the state shown in FIG. Ink introduction part 28 in the ink supply hole 23 of
By inserting the ink cartridge 11 into the head holder 10
When the end surface 30A is aligned with the pressing position for pressing the porous body 22 when it is set to, or when it is present in the vicinity of the position where it partially overlaps the pressing position, the region R is It had sufficient durability against the stress generated by pressing, and the phenomenon that the ink filter 31 was separated or damaged from the end face 30A did not occur. This is because when the ink filter 31 is heat-welded to the end face 30A, each region R is aligned with the pressing position where the end face 30A presses the porous body 22 with reference to the eye direction G of the weft thread 33 of the ink filter 31. Or, by arranging it in a vicinity position where it partially overlaps with the pressing position, it was possible to maintain a constant welding strength without variations in welding strength, and to alleviate stress via the region R. It is based on.

As shown in the example of FIG. 6C, the end face 30 of the ink filter 31 is located in the direction G of the weft thread 33.
In the welded state in which the heat is welded vertically above and below A, the region R welded along the eye direction G of the weft thread 33.
The ink filter 31 is most strongly welded to the end face 30A (in the two positions on the left and right of the end face 30A, which are shown by diagonal lines), but the region R is the ink supply of the ink cartridge 11. When the ink introducing portion 28 is inserted into the hole 23 and the ink cartridge 11 is set in the head holder 10, the end surface 30A is located at a position most distant from the pressing position for pressing the porous body 22. In such a case, when the ink introducing portion 28 is inserted into the ink supply hole 23 of the ink cartridge 11 and the ink cartridge 11 is set in the head holder 10, the ink filter is pressed at the position where the end surface 30A and the porous body 22 are pressed. It was confirmed that 31 was peeled off or damaged. It is considered that this is because the stress can hardly be relaxed depending on the region R, and therefore the welding force is small at the pressing position.

The ink filter 3 for the end face 30A is used.
The welding of No. 1 is performed by an automatic machine equipped with an image pickup camera. The image of the ink filter 31 picked up by the image pickup camera is subjected to predetermined image processing to detect the direction G of the eye of the weft thread 33, and After the direction G and the end surface 30A are aligned with the reference position, heat welding is performed via an ultrasonic generator, a heating tool, or the like. Here, returning to FIGS. 2 and 3, the description of the head holder 10 will be continued. On the back surface side of the bottom wall 35 of the head holder 10, a driving device (not shown) for performing ink ejection driving of the ink jet head 21. 3) is formed (see FIG. 3).

A contact portion 42 connected to the contact portion 36 is formed on the bottom wall 41 of the carriage 5. The driving device provided in the inkjet head 21 includes
Driving power is supplied through the contact portion 42 of the carriage 5 and the contact portion 36 of the head holder 10, and ink is ejected from the ink ejection nozzles onto the printing surface of the printing paper 12 to print various information.

Next, a method of setting the ink cartridge 11 on the head holder 10 will be described with reference to FIG. FIG. 7 shows the ink cartridge 11 in the head holder 1.
It is a sectional side view which shows the state set on 0.

The ink cartridge 11 is attached to the head holder 1
In order to set 0, the ink introducing portion 28 is set in the ink supply hole 23 of the ink cartridge 11 as shown in FIG.
Is inserted. At this time, the end surface 30A of the ink introducing portion 28
Will press the porous body 22 together with the ink filter 31, but the ink filter 31 is in a state shown in FIG. 6A or 6B, that is, the region R is at a position matching the pressing position or In a state in which the ink filter 31 is heat-welded to the end surface 30A so as to be arranged at a position that partially overlaps the pressing position, as described above, the region R acts to relieve the stress generated at the pressing position. Therefore, the ink filter 31 is never peeled off or damaged from the end surface 30A.

Further, when the ink cartridge 11 is moved downward while advancing toward the seal rubber 28A so that the ink introducing portion 28 enters the ink supply hole 23, the ink supply hole 23 is sealed by the seal rubber 28A and The positioning protrusion 24 is positioned in the positioning hole 34. As a result, the ink cartridge 11
Is set on the head holder 10, and this state is shown in FIG.

After the ink cartridge 11 is set on the head holder 10 as described above, the positioning protrusion 24 of the ink cartridge 11 is moved downward while being fitted into the positioning hole 34 of the head holder 10.
The cartridge mounting claw 40 is elastically locked in the recess 25 of the ink cartridge 11. As a result, the head holder 10 is set on the ink cartridge 11.

As described in detail above, in the ink jet printer 1 according to this embodiment, the ink filter 31 is used.
For heat-sealing the end surface 30A of the ink introducing portion 28, the weft thread 3 of the ink filter 31 having the twill weave structure is used.
A region R having a high welding strength, which is heat-welded to the end face 30A along the direction G of the third eye, inserts the ink introduction portion 28 into the ink supply hole 23 of the ink cartridge 11 to attach the ink cartridge 11 to the head holder 10. At the time of setting, since the end face 30A is heat-welded so as to be arranged at a position matching the pressing position for pressing the porous body 22, or at a position that partially overlaps the pressing position, the porous body 22 is pressed. Based on the fact that the region R has sufficient durability against the stress generated by the above, the constant welding strength can be maintained without variation in the welding strength between the ink filter 31 and the end surface 30A. In addition, it is possible to reliably prevent the ink filter 31 from being peeled off or damaged from the end surface 30A.

Next, another embodiment in which the ink filter 31 is heat-welded to the end surface 30A of the ink introducing portion 28 will be described with reference to FIGS. Here, FIG. 8 is a perspective view of a head holder according to another embodiment, and FIG. 9 is an explanatory view schematically showing a welding state of an ink filter with respect to an end face of an ink introducing portion in a head holder according to another embodiment. Is.

In this embodiment, the end face shape of the ink introducing portion is formed in an oval shape, and the shape of the ink filter and the seal rubber is different accordingly, which is different from the above embodiment. The remaining configuration is the same as that of the above embodiment. Therefore, in the following description, the same configurations as those of the above-described embodiment will be referred to, and the description will be given focusing on only the above-mentioned differences. Further, the same members and elements as those in the above-mentioned embodiment are designated by the same reference numerals.

In FIG. 8, the ink introducing tube 29 of the ink introducing portion 28 formed in the head holder 10 is vertically arranged in two.
It is formed in an elliptical shape having two long side portions 28B, whereby the end surface 30A (see FIG. 9) of the ink introducing portion 28 has an elliptical shape. In addition, the ink filter 31
It has an oval shape that matches the shape of the end face 30A, and is heat-welded to the end face 30A. Here, the ink filter 3
1, the warp yarn 32 and the weft yarn 33 are twill-woven in the same manner as described above, and the eye direction G of the weft yarn 33 matches the direction of the long side of the ellipse.

As described above, the elliptical ink filter 3
The state where 1 is heat-welded to the end face 30A will be described. In FIG. 9, the ink filter 31 has its elliptical shape matched with the elliptical shape of the end face 30A.
The weft thread 33 is heat-welded in a state where the eye direction G of the weft thread 33 is aligned with the long side portion 28B, and in this welding state, the weft thread 33 is welded along the eye direction G of the weft thread 33 so as to be aligned with the long side portion 28B. The ink filter 31 is most strongly welded to the end surface 30A in the defined region R (which exists at two positions above and below the end surface 30A and is shown by the diagonal lines). In this case, as in the case described above, when the ink introducing portion 28 is inserted into the ink supply hole 23 of the ink cartridge 11 and the ink cartridge 11 is set in the head holder 10, the area R particularly above the area R is set. On the end face 30A
Corresponds to the pressing position for pressing the porous body 22.

Therefore, in each region R, when the ink introducing portion 28 is inserted into the ink supply hole 23 of the ink cartridge 11 and the ink cartridge 11 is set in the head holder 10, the end face 30A presses the porous body 22. Since the region R has sufficient durability against the stress generated by pressing the porous body 22, the ink filter 31 may be separated or damaged from the end face 30A. Can be reliably prevented. In particular, in the ink filter 31, the long side portion 28 extends in the eye direction G of the weft thread 33.
It is welded to the elliptical end face 30A in a state of being matched with B, whereby the welding area at the welded portion between the ink filter 31 and the end face 30A is increased, and a larger welding force can be obtained. End surface 30A of the introduction portion 28
Even when the porous body 22 and the ink filter 31 come into contact with each other when the ink is fitted into the ink supply hole 23 of the ink cartridge 11, the ink filter 31 can be more reliably prevented from being damaged. .

Further, if the ink filter 31 and the end face 30A have the same elliptical shape, the direction of the weft thread 33 naturally matches the long side portion 28B, so that the weft thread can be easily positioned in a predetermined direction without any doubt. In order to achieve this, various shapes such as a rectangle and an ellipse as well as an oval shape can be used. The shape may be such that a protrusion and a recess that engage with each other are added to a part of both. It should be noted that the present invention is not limited to the above-described embodiments, and it goes without saying that various improvements and modifications can be made without departing from the spirit of the present invention.

[0045]

As described above, according to the present invention, it is possible to maintain a constant welding strength without causing variations in the welding strength of the ink filter that is welded to the end surface of the ink introducing portion, and to keep the end surface of the ink introducing portion. An ink jet printer capable of preventing the ink filter from being peeled off or damaged even when the porous body and the ink filter come into contact with each other when fitted into the ink supply hole of the ink cartridge. .

[Brief description of the drawings]

FIG. 1 is an external perspective view of an inkjet printer.

FIG. 2 is an exploded perspective view showing a carriage, a head holder, and an ink cartridge in a disassembled state.

FIG. 3 is a side sectional view showing a state in which the ink cartridge is set on the head holder.

FIG. 4 is an enlarged cross-sectional view of an ink introducing portion.

FIG. 5 is an explanatory diagram schematically showing the weaving structure of the ink filter.

FIG. 6 is an explanatory diagram schematically showing a welded state of an ink filter with respect to an end face of an ink introducing portion.

FIG. 7 is a side sectional view showing a state in which the ink cartridge is set on the head holder.

FIG. 8 is a perspective view of a head holder according to another embodiment.

FIG. 9 is an explanatory diagram schematically showing a welded state of an ink filter with respect to an end face of an ink introducing portion in a head holder according to another embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Inkjet printer 5 Carriage 10 Head holder 11 Ink cartridge 21 Inkjet head 22 Porous body 23 Ink supply hole 28 Ink introduction part 28A Seal rubber 28B Long side part 29 Ink introduction pipe 30 Ink introduction hole 30A End face of ink introduction part 31 Ink filter 32 Warp thread 33 Weft thread G Direction of weft thread R Area with high welding strength

Claims (5)

[Claims] 1. An ink jet head, a head mounting member provided with the ink jet head, an ink introducing portion provided in the head mounting member and having an ink introducing hole for introducing ink to the ink jet head, and a thin metal wire. The warp yarn and the weft yarn are twilled and woven, and an ink filter that is welded to the end face of the ink introducing portion and a porous body impregnated with ink are built in and an ink supply hole is formed, and the ink is supplied through the ink supply hole. In an ink jet printer having an ink cartridge in which an end surface of an introduction portion is fitted while pressing a porous body, the ink filter has a position where the end surface of the ink introduction portion presses the porous body or a position in the vicinity thereof. Ink jets characterized by being welded to the end face of the ink introducing portion along the direction of the weft threads. Ttopurinta. 2. An ink jet head, an ink introduction portion having ink introduction holes for introducing ink to the ink jet head, a warp thread and a weft thread of a fine metal wire are woven, and welded to an end surface of the ink introduction section. An ink cartridge having a porous body impregnated with ink, which has an ink filter, and an ink introducing portion is inserted into an ink supply hole of the ink cartridge while pressing the porous body with an end face of the ink introducing portion. In the inkjet printer to be mounted, in the ink filter, the weft yarns are formed with a finer pitch than the warp yarns, and the end face of the ink introducing portion presses the porous body at or near the pressing position, in the direction along the weft yarns. An inkjet printer characterized by being arranged. 3. The ink filter according to claim 2, wherein the weft thread is formed of a thinner line than the warp thread.
The ink-jet printer as described. 4. The end surface of the ink introducing portion and the ink filter are formed in a shape to be attached to each other such that the warp threads and the weft threads of the ink filter are oriented in a predetermined direction. The inkjet printer according to any one of 3 above. 5. The end surface of the ink introducing portion is formed in an oval shape having a long side portion, and the ink filter is welded to the end surface in a state where the direction of the weft threads of the ink filter is aligned with the long side portion. The inkjet printer according to claim 4, wherein: