JP2003311991A - Inkjet recorder - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an inkjet recorder capable of reducing an inkjet head in size by maintaining a volume of a common ink chamber. <P>SOLUTION: A shape of a cap 81 at a portion which contacts an opening face of a nozzle so as to cover the nozzle of a nozzle plate of a piezoelectric inkjet head is formed such that the cap 81 is waved in a predetermined width in a direction roughly perpendicular to an extending direction of common ink chambers 12a, 12b at a portion opposite to the common ink chambers 12a, 12b with the opening face therebetween. As the contact area of the portion is enlarged, a capping pressure applied to the nozzle plate at the portion opposite to the common ink chambers 12a, 12b is decentralized when the cap 81 is brought into contact therewith. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inkjet recording apparatus, and more particularly to the shape of a cap that protects nozzles of an inkjet head.

[0002]

2. Description of the Related Art A conventional ink jet recording apparatus such as an ink jet printer prints on a recording medium by ejecting ink from nozzles of an ink jet head, but it is necessary to prevent ink in the nozzles from drying when not in use. The nozzles are covered with a cap, or the nozzles are covered with a cap to suck the defective ink in the nozzle.

In the ink jet head, a common ink chamber for distributing and supplying ink to each pressure chamber communicating with a plurality of nozzles is located closer to the nozzle than the pressure chamber, as will be described later in an embodiment of the present invention. is doing. For this reason, when the cap covers the nozzle and comes into contact with the wall surface forming the common ink chamber, the wall surface cannot withstand the capping pressure and is recessed toward the common ink chamber side.

In order to solve this, conventionally, as shown in FIG. 13, for example, the cap 181 is brought into contact with a position outside the plurality of nozzles 115 and inside the common ink chamber 112, and the capping pressure is set. Moreover, the common ink chamber 112 is not affected.

[0005]

However, in general, the position where the cap 181 abuts is displaced to some extent due to assembly misalignment and the like, so that the inside dimension of the cap 181 cannot be made to be close to the nozzle, and the inside dimension of the cap 181 is small. If the design is made with a margin, the wall surface of the common ink chamber 112 is pressed even if the position is slightly displaced. Therefore, in order to eliminate this, the common ink chamber 112
It is necessary to widen the distance between the nozzle and the nozzle 115, but if this is done, the outer dimensions of the inkjet head will become large. Further, there has been a problem that the volume of the common ink chamber 112 cannot be secured when the outer dimensions of the inkjet head are reduced.

The present invention has been made in order to solve the above-mentioned problems, and while maintaining the volume of the common ink chamber,
An object of the present invention is to provide an inkjet recording device that can reduce the size of an inkjet head.

[0007]

In order to solve the above-mentioned problems, the ink jet recording apparatus of the invention according to claim 1 is
A plurality of nozzles that are open to the outside, a plurality of pressure chambers for supplying ink to each of the plurality of nozzles, and an ink supply hole that is opened in each of the plurality of pressure chambers. An ink jet head having a common ink chamber that distributes ink to the plurality of pressure chambers, and an actuator that includes a plurality of pressure generating units that respectively apply pressures for ejecting the ink to the pressure chambers, and the ink jet head An ink jet recording apparatus comprising: a cap that abuts against the opening surface of the nozzle of the head so as to cover the plurality of nozzles, wherein the common ink chamber of the ink jet head is more than the pressure chambers. The nozzles are arranged on the nozzle opening surface side and extend in a direction substantially parallel to the direction in which the plurality of nozzles are arranged. At least, the shape of the portion of the cap that abuts the nozzle opening surface of the facing portion of the common ink chamber is substantially orthogonal to the extending direction of the common ink chamber in a plane parallel to the nozzle opening surface. It is characterized in that it is formed in a wave shape having a predetermined width in the direction.

In the ink jet recording apparatus having this structure,
The shape of the portion of the cap that abuts the nozzle opening surface of the facing portion of the common ink chamber has a wavy shape having a predetermined width in a direction substantially orthogonal to the extending direction of the common ink chamber in a plane parallel to the nozzle opening surface. By forming the cap, when the ink-jet head is capped, the pressure applied from the cap to the common ink chamber via the contact portion can be dispersed.

According to the second aspect of the invention, the ink jet recording apparatus has a plurality of nozzles that are open to the outside, a plurality of pressure chambers for supplying ink to each of the plurality of nozzles, and a plurality of pressures. A common ink chamber that distributes the ink from the ink supply source to the plurality of pressure chambers through ink supply holes that are respectively opened in the chambers, and a plurality of pressures that apply pressure to eject the ink to each of the pressure chambers. An inkjet recording apparatus comprising: an inkjet head having an actuator having a pressure generating unit; and a cap that abuts against the opening surface of the nozzle of the inkjet head so as to cover the plurality of nozzles. The common ink chamber of the inkjet head is arranged closer to the nozzle opening surface side than the plurality of pressure chambers. And extending in a direction substantially parallel to the direction in which the plurality of nozzles are arranged, and extending at least the common ink chamber of the cap portion that abuts the nozzle opening surface of the facing portion of the common ink chamber. The width in the direction orthogonal to the installation direction is wider than the other contact portions.

In the ink jet recording apparatus having this structure,
In the portion of the cap that abuts against the nozzle opening surface of the facing portion of the common ink chamber, the width in the direction orthogonal to the extending direction of the common ink chamber is made wider than that of the other abutting portions, so that the inkjet head is capped. In this case, the pressure applied from the cap to the common ink chamber via the contact portion can be dispersed.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of an ink jet recording apparatus embodying the present invention will be described below with reference to the drawings. First, the overall configuration of an inkjet printer 100, which is an example of an inkjet recording apparatus, will be described with reference to FIG. FIG. 1 is a perspective view of an inkjet printer 100 according to this embodiment.

As shown in FIG. 1, the ink jet printer 100 is conveyed in the direction of an arrow B in the figure with an ink cartridge 61 filled with, for example, four color inks of cyan, magenta, yellow and black. A head unit 63 provided with the piezoelectric ink jet head 6 for printing on the paper 62, a carriage 64 on which the ink cartridge 61 and the head unit 63 are mounted, and a reciprocating movement of the carriage 64 in a direction orthogonal to the conveyance direction of the paper 62. A drive unit 65 to move,
A platen roller 66 that extends in the reciprocating direction of the carriage 64 and is arranged to face the piezoelectric inkjet head 6.
And a purging device 67.

The drive unit 65 has a carriage shaft 71 extending in parallel with a platen roller 66 arranged at a lower end of the carriage 64, a guide plate 72 arranged at an upper end of the carriage 64 and extending in parallel with the carriage shaft 71, and its guide plate 72. Two pulleys 73 arranged between the carriage shaft 71 and the guide plate 72 at both ends of the carriage shaft 71,
74 and an endless belt 75 that is stretched between these pulleys 73 and 74. One pulley 73
When the motor 76 is rotated in the forward and reverse directions by driving the motor 76, the carriage 64 joined to the endless belt 75 is linearly moved along the carriage shaft 71 and the guide plate 72 in accordance with the forward and reverse rotation of the pulley 73. It is supposed to be moved back and forth.

The paper 62 is the ink jet printer 10.
The paper is fed from a paper feed cassette (not shown) provided on the side of 0, is introduced between the piezoelectric inkjet head 6 and the platen roller 66, and is predetermined by the ink ejected from the piezoelectric inkjet head 6. Is printed,
After that, the paper is discharged. In FIG. 1, the paper feed mechanism and the paper discharge mechanism for the paper 62 are omitted.

The purging device 67 is provided on the side of the platen roller 66 and is arranged so as to face the piezoelectric ink jet head 6 when the head unit 63 is in the reset position. The purging device 67 covers a plurality of nozzles 15 of the piezoelectric inkjet head 6 which will be described later, and a cap 81 that abuts against the opening surface of the nozzle.
A pump 82, a cam 83, and an ink storage portion 84. Then, when the head unit 63 is at the reset position, the nozzles 15 of the piezoelectric inkjet head 6 are covered with the cap 81, and defective ink containing bubbles and the like accumulated inside the piezoelectric inkjet head 6 is
The pump 82 performs a suction operation by driving the cam 83, so that the piezoelectric inkjet head 6 is recovered. The sucked defective ink is stored in the ink storage portion 84.

Next, the structure of the head unit 63 will be described with reference to FIGS. FIG. 2 is a perspective view of the head unit 63 which is viewed upside down. FIG. 3 shows FIG.
3 is an exploded perspective view of a head unit 63 of FIG. FIG. 4 is an exploded perspective view of the head unit 63 seen from above. FIG. 5 is a bottom view of the head unit 63.

As shown in FIGS. 2 to 5, the head unit 63 mounted on the carriage 64 that runs along the paper 62 is formed in a substantially box-like shape with an open upper surface, and four ink cartridges are provided from above. There is a cartridge mounting portion 3 to which the ink cartridge 61 can be detachably mounted, and one side portion 3a of the cartridge mounting portion 3 has each ink cartridge 61
Ink supply path 4 connectable to the ink discharge part (not shown) of
The a, 4b, 4c and 4d communicate with the lower surface of the bottom plate 5 of the head unit 63. The cartridge mounting part 3
Each ink cartridge 61 is provided on the upper surface of the one side portion 3a.
The packing (not shown) made of rubber or the like is arranged so as to be in close contact with the ink discharge part (not shown).

The bottom plate 5 is horizontally formed so as to project downward from the cartridge mounting portion 3 by one step.
As shown in FIG. 2, two support portions 8 for arranging two piezoelectric inkjet heads 6 in parallel are formed in a stepped manner on the lower surface side of the bottom plate 5. Each support 8 has
A plurality of cavities 9a and 9b for fixing with a UV adhesive are formed so as to penetrate vertically.

An ink supply path 4a is provided at one end of each support portion 8.
Communication portions 46a, 46b, 46c, and 46d that communicate with the ink cartridge 61 via the through 4d are provided.
A fitting groove 48 having a figure-eight shape or the like in a plan view is recessed on the outer periphery of the communication portions 46a to 46d. A ring-shaped packing 47 made of rubber or the like is inserted in the fitting groove 48. When the piezoelectric inkjet head 6 is adhesively fixed to the support portion 8, the tip of the packing 47 is a piezoelectric inkjet described later. The ink supply port 19a of the head 6 (see FIG. 8)
(Refer to FIG. 3), the contact portion with the ink supply port 19a is sealed.

Then, a protective cover 44 for protecting the piezoelectric ink jet head 6 fixed by adhesion is attached so as to cover the fixed bottom plate 5 of the piezoelectric ink jet head 6. The protective cover 44 is provided with two elliptical openings along the longitudinal direction of the protective cover 44 so that the nozzles 15 of the piezoelectric inkjet head 6 are exposed. Further, both ends in the longitudinal direction are bent into a substantially U-shape, and when the protective cover 44 is fixed, the flexible flat cable 40 of the piezoelectric inkjet head 6 is aligned with the fold line.
Is bent and fixed above the head unit 63.

Next, the structure of the piezoelectric ink jet head 6 will be described with reference to FIGS. Figure 6
FIG. 3 is an exploded perspective view of the piezoelectric inkjet head 6. FIG. 7 is a side sectional view of the piezoelectric inkjet head 6. FIG. 8 is an exploded perspective view of the cavity plate 10. FIG. 9 is an exploded perspective view in which a main part of the cavity plate 10 is enlarged. FIG. 10 is an exploded perspective view in which a main part of the piezoelectric actuator 20 is enlarged.

As shown in FIGS. 6 and 7, the piezoelectric ink jet head 6 is adhered and laminated to a plurality of laminated cavity plates 10 and the cavity plates 10 via an adhesive or an adhesive sheet. A plate type piezoelectric actuator 20 and a flexible flat cable 4 on its upper surface for electrically connecting to an external device.
0 and 0 are superposed and joined by an adhesive, and the ink is ejected downward from the nozzle 15 opened on the lower surface side of the cavity plate 10 in the lowermost layer.

Next, as shown in FIG. 8, the cavity plate 10 has five thin metal plates, that is, a nozzle plate 11, two manifold plates 12, a spacer plate 13 and a base plate 14, which are respectively bonded by an adhesive agent. It has a structure that is stacked and laminated. In the present embodiment, each of these plates 11 to 14 is made of 42% nickel alloy steel plate (42 alloy) and has a thickness of about 50 μm to 150 μm.

As shown in FIG. 9, the base plate 14 is provided with a plurality of narrow pressure chambers 16 extending in a direction orthogonal to the longitudinal centerlines 14a and 14b in a zigzag arrangement in two rows. It is set up. Further, corresponding to each pressure chamber 16, the base plate 14 is
Of the ink supply holes 16b are formed at positions on both ends in the lateral direction of the ink jet printer, and a narrowed portion 16d is provided between the ink supply holes 16b.
Thus, each pressure chamber 16 and each ink supply hole 16b are connected to each other. Each ink supply hole 16b communicates with the common ink chambers 12a, 12b in the manifold plate 12 via each ink supply hole 18 formed at both left and right sides of the spacer plate 13 in the lateral direction. Here, the cross-sectional area of each throttle portion 16d in the direction orthogonal to the ink flowing direction is smaller than the cross-sectional area of each pressure chamber 16 in the same direction. This is because the flow passage resistance is increased by reducing the cross-sectional area of the narrowed portion 16d. Further, one end portion 16a of each pressure chamber 16 penetrates the nozzles 15 in the staggered arrangement in the nozzle plate 11, the spacer plate 13 and the two manifold plates 12 in the same staggered arrangement. The holes 17 communicate with each other.

As shown in FIG. 8, the base plate 14 and the spacer plate 13 are provided with ink supply ports 19a and 19b for supplying ink from the ink cartridge 61 to the common ink chambers 12a and 12b in the manifold plate 12, respectively. Each is drilled.
The two manifold plates 12 are provided with two common ink chambers 12a and 12b sandwiching a row formed by the plurality of nozzles 15 in the nozzle plate 11 and substantially parallel to the row. The common ink chambers 12a and 12b are formed so as to penetrate through the respective manifold plates 12, and one common ink chamber 12a communicates with one of the two rows of pressure chambers 16 and the other common ink chamber 12a. The chamber 12b communicates with the pressure chamber 16 in the other row. The common ink chambers 12a and 12b are located in a plane parallel to the plane formed by the plurality of pressure chambers 16 in the base plate 14, and are located closer to the nozzle plate 11 than the plurality of pressure chambers 16 are.

Further, the common ink chambers 12a and 12b are separated from the ink supply ports 19a and 19b in the direction away from the ink supply ports 19a and 19b at the ends (C portions) away from the ink supply ports 19a and 19b.
The cross-sectional area is reduced at a constant rate. This is for facilitating the discharge of residual bubbles that tend to accumulate at the ends (C portions) of the common ink chambers 12a and 12b. The common ink chambers 12a and 12b have a structure in which the nozzle plate 11 and the spacer plate 13 are stacked on the two manifold plates 12 to be hermetically sealed.

The nozzle plate 11 is provided with a plurality of nozzles 15 for ejecting ink having a minute diameter (in this embodiment, about 25 μm) along the longitudinal centerlines 11a and 11b of the nozzle plate 11 and a minute pitch P. The holes are arranged in a staggered arrangement at intervals of. And each nozzle 15
Correspond to each of the through holes 17 of the manifold plate 12.

As shown in FIG. 10, the piezoelectric actuator 20 has a structure in which two piezoelectric sheets 21 and 22 and one insulating sheet 23 are laminated. On the upper surface of the lowermost piezoelectric sheet 21, a plurality of narrow drive electrodes 24 corresponding to each pressure chamber 16 in the cavity plate 10 are provided in a staggered arrangement. Further, one end 24 a of each drive electrode 24 is connected to the front and back surfaces 20 of the piezoelectric actuator 20.
It is formed so as to be exposed on the left and right side surfaces 20c orthogonal to a and 20b.

A common electrode 25 common to the plurality of pressure chambers 16 is provided on the upper surface of the next-stage piezoelectric sheet 22. One end 25a of the common electrode 25 is also connected to each drive electrode 2
Similar to the one end portion 24a of No. 4, it is formed so as to be exposed on the left and right side surfaces 20c. Each drive electrode 24 and common electrode 25
The respective areas of the piezoelectric sheet 22 sandwiched between and serve as pressure generating portions corresponding to the respective pressure chambers 16. On the upper surface of the uppermost insulating sheet 23, a surface electrode 26 for each drive electrode 24 and a surface electrode 27 for the common electrode 25 are provided side by side along the left and right side surfaces 20c.

The drive electrodes 2 are provided on the left and right side surfaces 20c.
4 has a first recessed groove 30 at one end 24a of the common electrode 2
Second recessed grooves 31 are provided at one end portion 25a of No. 5 so as to extend in the stacking direction. Each first recessed groove 3
As shown in FIG. 7, side electrodes 32 that electrically connect the drive electrodes 24 and the surface electrodes 26 are also provided in the interior of 0.
The common electrode 25 and the surface electrode 2 are provided in the second recessed groove 31.
Side electrodes 33 are formed to electrically connect 7 to each other. In addition, the electrodes 28 and 29 are electrodes having a discarded pattern.

Next, with reference to FIG. 11, the cap 81 contacting the head unit 63 will be described. Figure 11
FIG. 8 is a diagram showing a positional relationship between the manifold plate 12 and the cap 81. As shown in FIG. 11, when the head unit 63 is in the reset position, that is, the cap 81 is formed in a box shape that opens toward the nozzle 15, and the nozzles are formed so as to cover the plurality of nozzles 15 in the nozzle plate 11. The shape of the contact surface of the peripheral wall of the cap 81 when contacting the opening surface of the common ink chamber 12
The portion facing a and 12b has a wavy shape having a predetermined width in a direction substantially orthogonal to the row direction of the nozzles 15 in a plane parallel to the nozzle opening surface. The predetermined width is substantially the same as the width of the common ink chambers 12a and 12b, and when the cap 81 performs the capping operation of the piezoelectric ink jet head 6, the common ink chambers 12a and 12b.
In order to disperse the capping pressure transmitted to the nozzle plate 11 in the portion opposed to, the contact area of the contact surface of the cap 81 facing the common ink chambers 12a and 12b is widened. Therefore, the common ink chambers 12a and 12b are present at positions sufficiently close to the nozzle 15.

The ink flows from the ink cartridge 61 into the common ink chambers 12a and 12b through the ink supply ports 19a and 19b formed at one end of the base plate 14 and the spacer plate 13, and the common ink chamber 12
It is distributed to each pressure chamber 16 from a through each ink supply hole 18, each ink supply hole 16b, and the narrowed portion 16d. Then, any drive electrode 2 of the drive electrodes 24 of the piezoelectric actuator 20 in the piezoelectric inkjet head 6 is used.
4, a voltage is applied between the common electrode 25 and the common electrode 25, and the portion of the drive electrode 24 to which the voltage is applied in the piezoelectric sheet 22,
That is, strain in the stacking direction due to piezoelectricity is generated in the pressure generating unit described above. Due to the pressure due to this distortion, the internal volume of the pressure chamber 16 corresponding to each drive electrode 24 is reduced, so that the ink in the pressure chamber 16 is ejected in the form of droplets from the nozzles 15 and onto the paper 62. Predetermined printing is performed.

When the printing on the paper 62 is completed, the head unit 63 mounted on the carriage 64 returns to the reset position, and the plurality of nozzles 15 of the piezoelectric ink jet head 6 are covered with the cap 81.

Then, as shown in FIG. 11, the cap 8
1 contacts the nozzle opening surface at a position facing the common ink chambers 12a and 12b, but as described above, since the portions corresponding to the common ink chambers 12a and 12b have a wavy shape, the capping pressure is Distributed. Therefore, even when the size of the piezoelectric ink jet head 6 is reduced, a structure that can withstand capping can be obtained, and a sufficient volume of the common ink chambers 12a and 12b can be ensured.

As described above, in the ink jet printer 100 according to the present embodiment, the cap 81
However, when abutting against the opening surface of the nozzle 15 so as to cover the plurality of nozzles 15 in the nozzle plate 11, the shape of the abutting surface of the cap 81 is common ink chambers 12a, 12
The common ink chambers 12a and 12b are formed in the nozzle 1 so that the common ink chambers 12a and 12b have a wavy shape having a predetermined width in a direction substantially orthogonal to the direction in which the nozzles 15 are arranged.
5, the piezoelectric ink jet head 6 can have a structure capable of withstanding the capping pressure even if the piezoelectric ink jet head 6 faces the cap 81. Therefore, the size of the piezoelectric inkjet head 6 can be reduced.

Needless to say, the present invention can be modified in various ways. For example, the shape of the cap 81 in the present embodiment is not limited to that shown in FIG. 11, and as shown in FIG. 12, the shape of the contact surface of the cap 81 is changed to the common ink chambers 12a and 12b. At the facing portion, the cap 81 in a direction substantially orthogonal to the extending direction thereof
It may be configured to be wider than the width of the contact portion.
In the cap 81 configured as described above, the contact area of the nozzle 15 with the opening surface of the portion facing the common ink chambers 12a and 12b is widened, and the capping pressure transmitted to the nozzle plate 11 is increased as in the present embodiment. Can be dispersed.

The shape of the contact surface of the cap 81 at the portion facing the common ink chambers 12a and 12b is not limited to a wavy shape or a thick shape, and for example, a shape that spreads radially from the surrounding portion so as to protect the nozzle 15. May be configured to have the contact surfaces of the common ink chambers 12a, 12b.
The contact area of the portion of the nozzle 15 facing the opening surface of the nozzle 15 becomes wider, and the common ink chamber 12
Any structure may be used as long as it can disperse the capping pressure transmitted to a and 12b. Further, although the piezoelectric type is used as the pressure generating unit in the piezoelectric actuator 20, the present invention is not limited to this, and an electrostatic pressure generating unit or the like may be used. Also, each plate 11-
The material 14 is not limited to metal, but may be resin, for example.

[0038]

As described above, in the ink jet recording apparatus according to the first aspect of the present invention, the shape of the cap portion that abuts the nozzle opening surface of the facing portion of the common ink chamber is parallel to the nozzle opening surface. When a cap is attached to the inkjet head by forming a wavy shape having a predetermined width in a direction substantially orthogonal to the extending direction of the common ink chamber in the plane, the common ink chamber is connected to the common ink chamber through the abutting portion. Such pressure can be dispersed. Therefore, the common ink chamber can be arranged also in the contact portion of the cap, and the ink jet head can be downsized.

Further, in the ink jet recording apparatus according to the second aspect of the invention, in the portion of the cap that abuts the nozzle opening surface of the facing portion of the common ink chamber, the width in the direction orthogonal to the extending direction of the common ink chamber. When the ink-jet head is capped, the pressure applied from the cap to the common ink chamber through the abutting portion can be dispersed by making the area wider than the other abutting portions. Therefore,
The common ink chamber can also be arranged in the contact portion of the cap, and the inkjet head can be downsized.

[Brief description of drawings]

FIG. 1 is a perspective view of an inkjet printer 100 according to the present embodiment.

FIG. 2 is a perspective view of a head unit 63 which is viewed upside down.

FIG. 3 is an exploded perspective view of the head unit 63 of FIG.

FIG. 4 is an exploded perspective view of a head unit 63 seen from above.

5 is a bottom view of the head unit 63. FIG.

FIG. 6 is an exploded perspective view of the piezoelectric inkjet head 6.

FIG. 7 is a side sectional view of the piezoelectric inkjet head 6.

FIG. 8 is an exploded perspective view of the cavity plate 10.

FIG. 9 is an exploded perspective view in which an essential part of the cavity plate 10 is enlarged.

FIG. 10 is an exploded perspective view showing an enlarged main part of the piezoelectric actuator 20.

FIG. 11 is a diagram showing a positional relationship between the manifold plate 12 and the cap 81.

FIG. 12 is a diagram showing a positional relationship between a manifold plate 12 and a cap 81.

FIG. 13 is a diagram showing a positional relationship between a conventional manifold plate and a cap 181.

[Explanation of symbols]

6 Piezoelectric inkjet head 12a, 12b common ink chamber 15 nozzles 16 Pressure chamber 16b, 18 ink supply hole 20 Piezoelectric actuator 81 cap 100 inkjet printer

Claims (2)

[Claims] 1. A plurality of nozzles opening to the outside, a plurality of pressure chambers for respectively supplying ink to each of the plurality of nozzles, and an ink supply hole opened in each of the plurality of pressure chambers, An ink jet having a common ink chamber that distributes the ink from the ink supply source to the plurality of pressure chambers, and an actuator that includes a plurality of pressure generation units that respectively apply pressures for ejecting the ink to the respective pressure chambers. An inkjet recording apparatus comprising: a head; and a cap that is in contact with an opening surface of the nozzle of the inkjet head so as to cover the plurality of nozzles, wherein the common ink chamber of the inkjet head includes the plurality of nozzles. A direction that is arranged closer to the nozzle opening surface than the pressure chamber and is substantially parallel to the direction in which the plurality of nozzles are arranged. Extending, at least, the shape of the portion of the cap abuts against the nozzle opening surface of the opposing portion of the common ink chamber,
An ink jet recording apparatus, wherein the ink jet recording apparatus is formed in a wave shape having a predetermined width in a direction substantially orthogonal to the extending direction of the common ink chamber in a plane parallel to the nozzle opening surface. 2. A plurality of nozzles opening to the outside, a plurality of pressure chambers for respectively supplying ink to each of the plurality of nozzles, and an ink supply hole opened in each of the plurality of pressure chambers, An ink jet having a common ink chamber that distributes the ink from the ink supply source to the plurality of pressure chambers, and an actuator that includes a plurality of pressure generation units that respectively apply pressures for ejecting the ink to the respective pressure chambers. An inkjet recording apparatus comprising: a head; and a cap that is in contact with an opening surface of the nozzle of the inkjet head so as to cover the plurality of nozzles, wherein the common ink chamber of the inkjet head includes the plurality of nozzles. A direction that is arranged closer to the nozzle opening surface than the pressure chamber and is substantially parallel to the direction in which the plurality of nozzles are arranged. The width of at least the portion of the cap that extends and is in contact with the nozzle opening surface of the facing portion of the common ink chamber in the direction orthogonal to the extending direction of the common ink chamber is larger than that of other abutting portions. An inkjet recording device characterized by being wide.