JP2013043376A - Ink-jet recording head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an ink-jet recording head which can be miniaturized while preventing interference between external ink supply tubes connected to ink supply nozzles.SOLUTION: A second ink supply nozzle 2b is erected adjacently to a first ink supply nozzle 2a on a head housing 3. In order to prevent a tube swell part 8a of an ink supply tube 6a which is formed by being inserted into the first ink supply nozzle 2a and a tube swell part 8b of an ink supply tube 6b which is formed by being inserted into the second ink supply nozzle 2b from interfering with each other, the position of the taper step part 7a of the first ink supply nozzle 2a and the position of the taper step part 7b of the second ink supply nozzle 2b are shifted from each other in the ink supply nozzle height direction.

Description

  The present invention relates to an ink jet recording head used in an ink jet recording apparatus, and more particularly to an ink jet recording head having a configuration in which a plurality of ink supply nozzles are arranged close to a predetermined portion of a head housing.

  Printing with inkjet recording heads is demanding high image quality output for consumer applications as well as industrial applications, and there are many demands for on-demand printing even in the field of large signage and poster printing. On-demand inkjet recording Many devices are used.

  Ink jet recording apparatuses for these applications are also required to be reduced in size and cost, and for ink jet recording heads, the mounting density of orifices (ink discharge nozzles), that is, the orifice spacing in the orifice array. There is a demand for downsizing the ink jet recording head and increasing the number of orifices by reducing the number of orifices and the distance between the plurality of orifice rows.

  Further, in recent years, as a method for forming a liquid crystal display or wiring patterning, the use of a forming method for discharging a special solution using an ink jet recording head is increasing. Such patterning is required to be performed only once in order to suppress the variation of the deposition surface with high accuracy, and higher density orifice mounting has been required.

  Here, when an ink jet recording head is mounted on an ink jet recording apparatus, there is an example in which a short tubular ink supply nozzle is disposed in the ink jet recording head for connection to an external ink supply tube. When ejecting with a single ink jet recording head, it is necessary to arrange a plurality of ink supply nozzles.

  FIG. 11 is a partial plan view of a conventional inkjet recording head, FIG. 12 is a side view of the inkjet recording head, and FIG. 13 is a partially enlarged side view of the inkjet recording head.

  Although not shown, various ink droplet ejection members such as an orifice plate, a pressure chamber plate, a restrictor plate, a diaphragm plate, and a piezoelectric vibrator are housed inside the head housing 3.

  The ink jet recording head of this example is compatible with four colors (Y, M, C, K) of ink, and as shown in FIG. 11, short tubular ink supply nozzles 2 (2a, 2b, 2c) corresponding to the respective colors. , 2d) are erected on one side of the head housing 3 in a substantially row shape. A taper stepped portion 7 is provided at a substantially intermediate position in the height direction of each ink supply nozzle 2 so that an ink supply tube (not shown) inserted into the ink supply nozzle 2 is not easily detached by ink pressure. .

  Further, as shown in FIG. 13, an adhesive 14 is applied to the joint between each ink supply nozzle 2 (2a, 2b, 2c, 2d) and the head housing 3 in order to prevent ink leakage.

  A configuration in which a plurality of ink supply nozzles are densely arranged in an ink jet recording head and inks of different colors are supplied to the respective ink supply nozzles, for example, is disclosed in Japanese Patent Application Laid-Open No. 2004-268454. No. 1 (Patent Document 1).

  In the conventional ink jet recording head, when a plurality of ink supply nozzles 2 (2a, 2b, 2c, 2d) are collectively installed on a predetermined portion of the head housing 3, for example, on one side of the head housing 3, FIG. As shown in FIG. 3, a plurality of ink supply nozzles 2 (2a, 2b, 2c, 2d) having the same height (length) are used and are vertically erected from the same upper surface of the head housing 3.

  Accordingly, the taper stepped portions 7 provided in the respective ink supply nozzles 2 (2a, 2b, 2c, 2d) are at the same height. Although not shown, when an ink supply tube is inserted into each ink supply nozzle 2, a tube bulge portion that covers the tapered stepped portion 7 and protrudes toward the outer periphery is formed at a part thereof. These tube bulges are also at the same height.

  As described above, in an inkjet recording head in which a plurality of orifice arrays are desired to be arranged at a high density, when a plurality of ink supply nozzles are to be arranged close to each other, the adjacent ink supply nozzles and an external connection connected to the ink supply nozzles are arranged. In order to prevent interference between the ink supply tubes (particularly the tube bulges), the distance e between the hole centers of the adjacent ink supply nozzles, for example, the ink supply nozzles 2a and 2b, is set to the row direction (X direction) 9 or a digit direction orthogonal thereto (X direction). Therefore, there is a problem that it is an obstacle to miniaturization of the ink jet recording head.

  In the conventional ink jet recording head, as shown in FIG. 13, an adhesive 14 is applied to seal the joint surface 13 between the ink supply nozzle 2 and the head housing 3. Since it is flat, the adhesive 14 leaks from the periphery of the ink supply nozzle 2, and the adhesive 14 around the ink supply nozzle 2 is insufficient, so that a sufficient sealing effect may not be obtained.

  Furthermore, it is necessary to work carefully so that the adhesive 14 does not adhere to other surfaces such as the side surface of the head housing 3 during the sealing operation with the adhesive 14, and there is a problem that the work efficiency is poor.

  SUMMARY OF THE INVENTION An object of the present invention is to provide an ink jet recording head capable of reducing the size while eliminating the disadvantages of the prior art and preventing interference between external ink supply tubes connected to ink supply nozzles.

In order to achieve the above object, the first means of the present invention comprises:
An orifice plate in which a large number of orifices are arranged;
A pressure chamber plate having a pressure chamber in communication with the orifice and storing ink therein;
A pressure generation source such as a piezoelectric vibrator that instantaneously applies pressure to the ink in the pressure chamber and discharges ink droplets from the orifice;
A head housing that supports and houses the orifice plate, pressure chamber plate and pressure source;
A taper stepped portion is provided in the middle of the height direction, and a plurality of ink supply nozzles installed together at a predetermined location on the outer periphery of the head housing;
In an ink jet recording head comprising a plurality of ink supply tubes that are inserted into the respective ink supply nozzles to cover the taper stepped portion to form tube bulge portions and are individually fixed to the ink supply nozzles.
A second ink supply nozzle is erected next to the first ink supply nozzle on the head housing;
The tube bulge portion of the ink supply tube formed by being inserted into the first ink supply nozzle and the tube bulge portion of the ink supply tube formed by being inserted into the second ink supply nozzle do not interfere with each other. like,
The position of the taper stepped portion of the first ink supply nozzle and the position of the taper stepped portion of the second ink supply nozzle are shifted from each other in the height direction of the ink supply nozzle. .

The second means of the present invention is:
An orifice plate in which a large number of orifices are arranged;
A pressure chamber plate having a pressure chamber in communication with the orifice and storing ink therein;
A pressure source that instantaneously applies pressure to the ink in the pressure chamber to eject ink droplets from the orifice;
A head housing that supports and houses the orifice plate, pressure chamber plate and pressure source;
A taper stepped portion is provided in the middle of the height direction, and a plurality of ink supply nozzles erected together at predetermined locations on the outer periphery of the head housing;
In an ink jet recording head comprising a plurality of ink supply tubes that are individually fixed to the ink supply nozzles by inserting into each of the ink supply nozzles and covering the tapered stepped portion,
A second ink supply nozzle is erected next to the first ink supply nozzle on the head housing;
The tube bulge portion of the ink supply tube formed by being inserted into the first ink supply nozzle and the tube bulge portion of the ink supply tube formed by being inserted into the second ink supply nozzle do not interfere with each other. like,
The first ink supply nozzle is inclined from the head housing in a direction in which the taper step portion of the first ink supply nozzle is separated from the taper step portion of the second ink supply nozzle. It is characterized by that.

A third means of the present invention is the first or second means,
The plurality of ink supply nozzles are non-linearly arranged on the head housing at a predetermined interval.

According to a fourth means of the present invention, in the first means,
The plurality of ink supply nozzles are arranged on the head housing, and an ink supply nozzle at one end or both ends of the ink supply nozzle row is the first ink supply nozzle, and the ink supply An ink supply nozzle inside the first ink supply nozzle of the nozzle row is the second ink supply nozzle;
The taper step portion of the first ink supply nozzle is shifted upward or downward in the height direction of the ink supply nozzle with respect to the taper step portion of the second ink supply nozzle. is there.

A fifth means of the present invention is the first or fourth means,
Using a plurality of ink supply nozzles having the same overall length and the same position of the taper stepped portion on the ink supply nozzle,
A counterbore is formed at a position where the first ink supply nozzle of the head housing is erected, and a counterbore is not formed at a position where the second ink supply nozzle is erected,
By providing the ink supply nozzles upright at each position of the head housing, the taper stepped portion of the first ink supply nozzle is made higher than the taper stepped portion of the second ink supply nozzle. It is characterized by being shifted downward in the vertical direction.

According to a sixth means of the present invention, in the second means,
The plurality of ink supply nozzles are arranged on the head housing, and an ink supply nozzle at one end or both ends of the ink supply nozzle row is the first ink supply nozzle, and the ink supply An ink supply nozzle inside the first ink supply nozzle of the nozzle row is the second ink supply nozzle;
The second ink supply nozzle is erected vertically on the head housing;
The first ink supply nozzle is inclined toward the outer side in the ink supply nozzle row direction with respect to the second ink supply nozzle.

According to a seventh means of the present invention, in any one of the first to sixth means,
A counterbore part is formed at a position where the first ink supply nozzle of the head housing is erected, and the counterbore part seals a joint part between the head housing and the first ink supply nozzle. It is characterized by being a reservoir.

  The present invention is configured as described above, and can provide an ink jet recording head that can be reduced in size while preventing interference between external ink supply tubes connected to ink supply nozzles.

1 is a perspective view of an ink jet recording head according to Embodiment 1 of the present invention. It is a partial plan view of the ink jet recording head. It is a side view of the ink jet recording head. 2 is a partially enlarged side view of the ink jet recording head. FIG. FIG. 4 is a partially enlarged side view showing a state where an ink supply tube is connected to an ink supply nozzle of the ink jet recording head. It is a disassembled perspective view of the on-demand type head part used for the ink jet recording head. It is a longitudinal cross-sectional view of the on-demand type head part. FIG. 6 is a partial plan view of an ink jet recording head according to Example 2 of the invention. It is a side view of the ink jet recording head. FIG. 4 is a partially enlarged side view showing a state where an ink supply tube is connected to an ink supply nozzle of the ink jet recording head. It is a partial plan view of a conventional ink jet recording head. It is a side view of the ink jet recording head. 2 is a partially enlarged side view of the ink jet recording head. FIG.

Next, each embodiment of the present invention will be described with reference to the drawings.
Example 1
1 is a perspective view of an ink jet recording head according to a first embodiment of the present invention, FIG. 2 is a partial plan view of the ink jet recording head, FIG. 3 is a side view of the ink jet recording head, and FIG. 5 is a partially enlarged side view, FIG. 5 is a partially enlarged side view showing a state in which an ink supply tube is connected to the ink supply nozzle of the ink jet recording head, and FIG. 6 is an exploded perspective view of an on-demand type head unit used for the ink jet recording head. FIG. 7 is a longitudinal sectional view of the on-demand type head portion.

  First, the configuration and operation principle of an on-demand type head unit used in this ink jet recording head will be described with reference to FIGS.

  6 and 7, reference numeral 71 is an orifice, 72 is an orifice plate, 73 is a pressure chamber, 74 is a pressure chamber plate, 75 is a restrictor, 76 is a restrictor plate, 77 is a diaphragm, 78 is a filter, and 79 is a diaphragm. Plate, 80 is a hole, 81 is a support frame, 82 is a common liquid passage, 83 is a housing, 84 is an adhesive, 85 is a piezoelectric actuator, 86 is a piezoelectric vibrator, 87 is an external electrode, and 88 is a conductive adhesive , 89 is a support substrate, 90 is an individual electrode, 91 is a common electrode, 92 is a through hole, and 93 is a liquid introduction pipe.

  As shown in FIG. 6, this on-demand type head portion is mainly composed of an orifice plate 72, a pressure chamber plate 74, a restrictor plate 76, a diaphragm plate 79, a support frame 81, a housing 83, a piezoelectric actuator 85, and the like. Yes.

  The orifice plate 72 having a large number of orifices 71 formed in one or a plurality of rows is manufactured by a nickel material electroforming method, a precision pressing method such as a stainless steel material, or a laser processing method. A number of pressure chambers 73 corresponding to the orifices 71 are formed in the pressure chamber plate 74 and communicate with the orifices 71. As shown in FIG. 7, the restrictor plate 76 communicates with the common liquid passage 82 and the pressure chamber 73 to form a restrictor 75 that controls the amount of liquid flowing into the pressure chamber 73. The pressure chamber plate 74 and the restrictor plate 76 are manufactured by a stainless steel material etching method or precision press processing, a nickel material electroforming method, or the like.

  The diaphragm plate 79 is formed with a diaphragm 77 for efficiently transmitting the pressure of the piezoelectric vibrator 86 to the pressure chamber 73, and a filter 78 for removing dust in the liquid flowing into the restrictor 75 from the common liquid passage 82. Yes. The diaphragm plate 79 is manufactured by a stainless steel etching method or a nickel electroforming method.

  When the support frame 81 fixes the diaphragm 77 and the piezoelectric vibrator 86 with the adhesive 84, the support frame 81 regulates the position of the vibration system fixing end of the diaphragm 77, and the adhesive protruding from the adhesion portion spreads on the diaphragm 77. A restricting hole 80 is formed. The support frame 81 is manufactured by a stainless steel material etching method or precision pressing, a nickel material electroforming method, or the like. A casing 83 made of metal or synthetic resin is provided with a common liquid passage 82, and a liquid introduction pipe 93 is connected to the common liquid passage 82.

  The ink supplied from the liquid introduction pipe 93 passes through the filter 78 in the middle of the common liquid passage 82 of the head portion, and flows in order to the restrictor 75, the pressure chamber 73, and the orifice 71. By applying a predetermined pulse voltage between the individual electrode 90 and the common electrode 91, the piezoelectric vibrator 86 expands and contracts. When the application of the pulse voltage is stopped, the piezoelectric vibrator 86 returns to the state before expansion and contraction. Due to such deformation of the piezoelectric vibrator 86, pressure is instantaneously applied to the ink stored in the pressure chamber 73, and the ink forms droplets from the orifice 71 and landes on a recording medium such as paper, thereby causing an image. Form.

  Various ink droplet discharge members such as the orifice plate 72, the pressure chamber plate 74, the restrictor plate 76, the diaphragm plate 79, and the piezoelectric vibrator 86 are accommodated in the head housing 3 shown in FIG.

  The ink jet recording head 1 according to this embodiment is compatible with inks of four colors (Y, M, C, K). As shown in FIG. 1, short tubular ink supply nozzles 2 (2a, 2b, 2c, 2d) are erected in a substantially row form on one side of the outer peripheral portion of the head housing 3. A taper stepped portion 7 is formed at a substantially intermediate position (midway) in the height direction of each ink supply nozzle 2 so that the ink supply tube 6 inserted into the ink supply nozzle 2 does not easily come off due to ink pressure.

  Each ink supply nozzle 2 is connected to a liquid introduction pipe 93 shown in FIG. 6 through a flow path (not shown). Reference numeral 15 in FIG. 1 denotes a flat cable, which is connected to the individual electrode 90 and the common electrode 91 shown in FIG.

  The four ink supply nozzles 2 (2a, 2b, 2c, 2d) are close to a staggered arrangement or a "<" shape when viewed from the plane at the joint surface 4 between the ink supply nozzle 2 and the head housing 3. An arrangement in which the distance a between the centers of holes of adjacent ink supply nozzles 2, for example, the ink supply nozzle 2a and the ink supply nozzle 2b shown in FIG. It has become.

  Further, the two ink supply nozzles 2 a and the ink supply nozzle 2 d located outside of the four ink supply nozzles 2 are formed with counterbore portions 5 on the head housing 3 side. The joint surface 4 is offset b in the head housing depth direction, that is, a stepped-down arrangement. Therefore, as shown in FIG. 3, the positions of the taper stepped portions 7 of the ink supply nozzle 2a and the ink supply nozzle 2b are vertically related, and the ink supply nozzle 2c and the ink supply nozzle 2d are similarly tapered. Are in a vertical relationship.

  FIG. 5 is a diagram showing a state where the ink supply tubes 6a and 6b are attached (connected) to the ink supply nozzle 2a and the ink supply nozzle 2b, respectively. The ink supply tubes 6a and 6b have flexibility. As shown in this figure, when the ink supply tube 6 is attached to the ink supply nozzle 2 provided with the taper stepped portion 7, the ink supply tube 6 is provided. A tube bulge portion 8 is formed in a portion covering the taper stepped portion 7.

As described above, since the positions of the tapered stepped portions 7a and 7b of the ink supply nozzle 2a and the ink supply nozzle 2b are in a vertical relationship, the tube bulge portions 8a and 8b formed by the tapered stepped portions 7a and 7b are also in the vertical direction. The tube bulges 8a and 8b do not interfere with each other. The same applies to the ink supply nozzle 2c and the ink supply nozzle 2d, and interference between the tube bulges 8 can be avoided.
Therefore, in this embodiment, the offset b amount (decrease width) of the ink supply nozzle 2 is a dimension that the adjacent tube bulge portions 8 do not interfere with each other.

  As shown in FIG. 4, the joint portion of each ink supply nozzle 2 with the head housing 3 is liquid-tightly sealed with an adhesive 14.

  In this embodiment, the overall height (length) is the same, and the plurality of ink supply nozzles 2 at the same position of the taper stepped portion 7 on the ink supply nozzle 2 are used. A counterbore portion 5 is formed at the position of the head housing 3 to be installed, and a specific ink supply nozzle 2 is installed in the counterbore portion 5, whereby the taper stepped portion 7 of the specific ink supply nozzle 2 is formed. Although the position is lower than the taper stepped portion 7 of the other ink supply nozzle 2, the height (length) of the specific ink supply nozzle 2 is made lower than that of the other ink supply nozzle 2, and the counterbore portion 5. It is also possible to stand the ink supply nozzles 2 on a normal head housing 3 that does not form the nozzles, and to make a difference in the taper stepped portion 7 depending on the height (length) of the ink supply nozzles 2.

(Example 2)
FIG. 8 is a partial plan view of an inkjet recording head according to Embodiment 2 of the present invention, and FIG. 9 is a side view of the inkjet recording head.

  The ink jet recording head according to this embodiment is also compatible with four colors (Y, M, C, K) of ink as in the first embodiment. As shown in FIG. 8, a short tubular ink supply nozzle 2 is provided for each color. Four (2a, 2b, 2c, 2d) are erected in a substantially line shape on one side of the outer peripheral portion of the head housing 3. A taper stepped portion 7 is formed at a substantially intermediate position in the height direction of each ink supply nozzle 2.

  Further, the four ink supply nozzles 2 (2a, 2b, 2c, 2d) are arranged in a staggered pattern or a "<" shape in a staggered arrangement as seen from the plane at the joint surface 4 between the ink supply nozzle 2 and the head housing 3. They are arranged in a non-linear manner with a predetermined interval such as a close arrangement.

  As shown in FIG. 9, the two inner ink supply nozzles 2 b and 2 c are erected vertically to the joint surface 13 of the head housing 3. On the other hand, the outer (both sides) two ink supply nozzles 2a (2d) have inner ink supply nozzles 2b (2c) such that the upper ends thereof are separated from the upper ends of the adjacent ink supply nozzles 2b (2c). ) On the outer side opposite to) and inclined by a predetermined angle d.

  In this way, the ink supply nozzle 2a (2d) is installed so as to be inclined toward the outside so as to be separated from the upper end of the ink supply nozzle 2b (2c), for example, the ink supply nozzle shown in FIG. A sufficient distance c between the hole centers of the upper end of 2a and the upper end of the ink supply nozzle 2b can be ensured.

  As shown in FIG. 9, in order to provide the ink supply nozzle 2a (same for the ink supply nozzle 2d) at a predetermined angle d on the head housing 3, a counterbore portion 12 slightly inclined is formed on the head housing 3. . In addition, the ink supply nozzle insertion hole 11 in the head housing 3 is inclined as the ink supply nozzle 2a is provided at an inclination.

  FIG. 10 is a diagram illustrating a state where the ink supply tubes 6a and 6b are attached to the ink supply nozzle 2a and the ink supply nozzle 2b, respectively. As shown in this figure, when the ink supply tube 6 is attached to the ink supply nozzle 2 provided with the taper stepped portion 7, the tube bulge portion 8 is formed on the portion of the ink supply tube 6 that covers the taper stepped portion 7. Is formed.

As described above, since the upper end portion of the ink supply nozzle 2a is inclined away from the upper end portion of the ink supply nozzle 2b, the tube bulge portions 8a and 8b formed by the tapered step portions 7a and 7b are also separated. , They will not interfere with each other. The same applies to the ink supply nozzle 2c and the ink supply nozzle 2d, and interference of the tube bulge portion 8 can be avoided.
Therefore, in the present embodiment, the inclination angle d of the ink supply nozzle 2a (ink supply nozzle d) to the outside with respect to the ink supply nozzle 2b (ink supply nozzle 2c) is such that the adjacent tube bulges 8 do not interfere with each other. Become.

  In the first and second embodiments, the ink supply nozzle 2 and the head housing 3 are made of a stainless steel machined product, and the joint between the two is liquid-tightly bonded with an adhesive 14 such as an epoxy adhesive. It is fixed. With this configuration, it is possible to withstand the use of water-based ink, oil-based ink, UV ink, and even a special patterning solution.

  In order to prevent ink leakage at the joint between the ink supply nozzle 2 and the head housing 3, an adhesive 14 surrounds the ink supply nozzle 2 inserted into the ink supply nozzle insertion hole 11 (see, for example, FIG. 9) of the head housing 3. It is necessary to seal with.

  In the first and second embodiments, as shown in FIGS. 3 and 9, the head housing 3 is formed with counterbore portions 5, 12, that is, recessed portions, and the ink supply nozzles 2 are embedded in the counterbore portions 5, 12 for bonding. It has a fixed structure. In this structure, the counterbore parts 5 and 12 (recesses) have an adhesive reservoir function, so that there is an effect of suppressing leakage of the adhesive from the periphery of the ink supply nozzle 2. Further, the counterbore portions 5 and 12 (recessed portions) have a function of storing an adhesive, whereby the adhesive strength between the ink supply nozzle 2 and the head housing 3 is improved.

  1: ink jet recording head, 2, 2a to 2d: ink supply nozzle, 3: head housing, 4: joint surface, 5: counterbore, 6, 6a, 6b: ink supply tube, 7, 7a, 7b: taper step Attached part, 8, 8a, 8b: Tube bulge part, 11: Ink supply nozzle insertion hole, 12: Counterbore part, 13: Joining surface, 14: Adhesive, 71: Orifice, 72: Orifice plate, 73: Pressure chamber 74: pressure chamber plate, 75: restrictor, 76: restrictor plate, 77: diaphragm, 79: diaphragm plate, 82: common liquid passage, 85: piezoelectric actuator, 86: piezoelectric vibrator, 93: liquid introduction pipe, a: Hole center distance, b: Offset, c: Hole center distance, d: Inclination angle.

JP 2004-268454 A

Claims (7)

An orifice plate in which a large number of orifices are arranged;
A pressure chamber plate having a pressure chamber in communication with the orifice and storing ink therein;
A pressure source that instantaneously applies pressure to the ink in the pressure chamber to eject ink droplets from the orifice;
A head housing that supports and houses the orifice plate, pressure chamber plate and pressure source;
A taper stepped portion is provided in the middle of the height direction, and a plurality of ink supply nozzles installed together at a predetermined location on the outer periphery of the head housing;
In an ink jet recording head comprising a plurality of ink supply tubes that are inserted into the respective ink supply nozzles to cover the taper stepped portion to form tube bulge portions and are individually fixed to the ink supply nozzles.
A second ink supply nozzle is erected next to the first ink supply nozzle on the head housing;
The tube bulge portion of the ink supply tube formed by being inserted into the first ink supply nozzle and the tube bulge portion of the ink supply tube formed by being inserted into the second ink supply nozzle do not interfere with each other. like,
An ink jet recording head, wherein the position of the taper stepped portion of the first ink supply nozzle and the position of the taper stepped portion of the second ink supply nozzle are shifted from each other in the height direction of the ink supply nozzle. . An orifice plate in which a large number of orifices are arranged;
A pressure chamber plate having a pressure chamber in communication with the orifice and storing ink therein;
A pressure source that instantaneously applies pressure to the ink in the pressure chamber to eject ink droplets from the orifice;
A head housing that supports and houses the orifice plate, pressure chamber plate and pressure source;
A taper stepped portion is provided in the middle of the height direction, and a plurality of ink supply nozzles erected together at predetermined locations on the outer periphery of the head housing;
In an ink jet recording head comprising a plurality of ink supply tubes that are individually fixed to the ink supply nozzles by inserting into each of the ink supply nozzles and covering the tapered stepped portion,
A second ink supply nozzle is erected next to the first ink supply nozzle on the head housing;
The tube bulge portion of the ink supply tube formed by being inserted into the first ink supply nozzle and the tube bulge portion of the ink supply tube formed by being inserted into the second ink supply nozzle do not interfere with each other. like,
The first ink supply nozzle is inclined from the head housing in a direction in which the taper step portion of the first ink supply nozzle is separated from the taper step portion of the second ink supply nozzle. An ink jet recording head. The inkjet recording head according to claim 1 or 2,
An ink jet recording head, wherein the plurality of ink supply nozzles are non-linearly arranged on the head housing at a predetermined interval. The inkjet recording head according to claim 1, wherein
The plurality of ink supply nozzles are arranged on the head housing, and an ink supply nozzle at one end or both ends of the ink supply nozzle row is the first ink supply nozzle, and the ink supply An ink supply nozzle inside the first ink supply nozzle of the nozzle row is the second ink supply nozzle;
Ink jet recording, wherein the taper stepped portion of the first ink supply nozzle is displaced upward or downward in the height direction of the ink supply nozzle with respect to the taper stepped portion of the second ink supply nozzle. head. In the ink jet recording head according to claim 1 or 4,
Using a plurality of ink supply nozzles having the same overall length and the same position of the taper stepped portion on the ink supply nozzle,
A counterbore is formed at a position where the first ink supply nozzle of the head housing is erected, and a counterbore is not formed at a position where the second ink supply nozzle is erected,
By providing the ink supply nozzles upright at each position of the head housing, the taper stepped portion of the first ink supply nozzle is made higher than the taper stepped portion of the second ink supply nozzle. An ink jet recording head that is shifted downward in the vertical direction. The inkjet recording head according to claim 2,
The plurality of ink supply nozzles are arranged on the head housing, and an ink supply nozzle at one end or both ends of the ink supply nozzle row is the first ink supply nozzle, and the ink supply An ink supply nozzle inside the first ink supply nozzle of the nozzle row is the second ink supply nozzle;
The second ink supply nozzle is erected vertically on the head housing;
An ink jet recording head, wherein the first ink supply nozzle is inclined outward in the ink supply nozzle row direction with respect to the second ink supply nozzle. The ink jet recording head according to any one of claims 1 to 6,
A counterbore part is formed at a position where the first ink supply nozzle of the head housing is erected, and the counterbore part seals a joint part between the head housing and the first ink supply nozzle. An ink jet recording head characterized by being a reservoir.

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