JP2006272645A - Liquid jet apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a liquid jet apparatus which can adjust inclination while holding the center of a nozzle surface, without being upsized, and which can establish compatibility between an increase in the accuracy of adjustment resolution and the expansion of an adjusting range. <P>SOLUTION: This liquid jet apparatus comprises: a liquid jet head which has a nozzle forming member with a nozzle array formed in such a manner that a plurality of nozzle openings are provided in line, and a series of liquid channel leading to the nozzle opening through a pressure chamber from a common liquid chamber, and which can eject a liquid in the pressure chamber as a droplet from the nozzle opening by fluctuating the pressure of the liquid in the pressure chamber by means of a pressure generating source; and a carriage 4 for housing the liquid jet head in the state of exposing a nozzle forming surface of the nozzle forming member. Both a part 54, subject to sliding, of the carriage and a sliding part 53 of the recording head 5 to be housed in the carriage are formed along a virtual circle D1 concentric with the center O of the nozzle forming surface 52, and the recording head 5 is relatively rotated with respect to the carriage in such a manner that the center O of the nozzle forming surface 52 serves as the center of rotation. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a liquid ejecting apparatus in which a liquid ejecting head having a nozzle row in which nozzle openings capable of discharging various liquids are arranged is housed in a carriage.

  Examples of the liquid ejecting apparatus in which a liquid ejecting head having a nozzle array in which nozzle openings capable of discharging various liquids are arranged are accommodated in a carriage include an ink jet recording apparatus such as a printer or a plotter. In this ink jet recording apparatus, the nozzle forming surface on which the nozzle row of the liquid jet head is formed is attached without tilting to the carriage that always moves in parallel with the recording paper during printing, and the carriage It is important for the nozzle row to be orthogonal to the moving direction (main scanning direction) in order to prevent the landing position error of the ink droplet and improve the printing quality. On the other hand, since the liquid jet head is composed of many parts, an assembly error may occur due to part tolerances, and even when the head itself is made with high accuracy, an error may occur when it is attached to the carriage. is there.

  For this reason, the conventional ink jet recording apparatus is provided with a mechanism for finely adjusting the mounting position of the liquid jet head with respect to the carriage. As this fine adjustment mechanism, for example, a liquid ejecting head having a nozzle row is attached to a carriage so as to be rotatable about one of four corners of a substantially rectangular corner, and is brought into contact with a side surface of the liquid ejecting head. By rotating an eccentric cam provided on the carriage, the torsion (inclination with respect to the sub-scanning direction orthogonal to the main scanning direction) of the nozzle row on the nozzle forming surface can be finely adjusted (for example, see Patent Document 1), or an adjustment spacer (See, for example, Patent Document 2).

JP 2002-19097 A (FIG. 4) JP-A-6-262824 (see FIGS. 1 and 3)

  In such a system that adjusts the twist of the nozzle surface by rotating such a liquid ejecting head around one corner of the four corners, the center of rotation is outside the nozzle row, so that the entire nozzle row is shaken. As a result, the center of the nozzle surface moves, and the adjustment amount (vibration width in the rotation direction) differs between the nozzle row close to the rotation center and the nozzle row away from the rotation center. End up. For this reason, it has been difficult to achieve both high adjustment resolution (high accuracy adjustment) and expansion of the adjustment range.

  The present invention has been proposed in view of such circumstances, and can adjust the torsion of the nozzle row while maintaining the center of the nozzle forming surface without increasing the size of the apparatus, and has high adjustment resolution. It is an object of the present invention to provide a liquid ejecting apparatus that can achieve both accuracy and expansion of the adjustment range.

The present invention has been made in order to achieve the above object, and a nozzle forming member in which a nozzle array formed by arranging a plurality of nozzle openings is formed, and the nozzle from a common liquid chamber through a pressure chamber A liquid ejecting head having a series of liquid flow paths leading to the opening, and capable of discharging the liquid in the pressure chamber as droplets from the nozzle opening by causing a pressure fluctuation in the liquid in the pressure chamber by a pressure generation source;
A carriage that accommodates the liquid ejecting head in a state where the nozzle forming surface of the nozzle forming member is exposed,
The liquid jet head has a sliding portion formed in an arc shape along a virtual circle concentric with the center of the nozzle forming surface of the nozzle forming member,
The carriage has a sliding portion that is formed in an arc shape along the virtual circle and that guides the sliding portion in a slidable manner.
The liquid ejecting head is mounted on the carriage in a state where the sliding portion is engaged with the sliding portion, and the nozzle forming member is formed as a nozzle with the center of the nozzle forming surface as a rotation center with respect to the carriage. It is characterized by being configured to be rotatable in the surface direction.

  According to the above configuration, the carriage and the liquid jet head accommodated in the carriage are slidably guided along the arcuate sliding portion and the sliding portion along a virtual circle concentric with the center of the nozzle forming surface. Therefore, the liquid ejecting head can always be rotated relative to the carriage with the center of the nozzle forming surface as the center of rotation. Thereby, even if the nozzle forming member of the liquid ejecting head is rotated in the nozzle forming surface direction, the center of the nozzle forming surface is not shifted with respect to the carriage, and both the adjustment resolution is highly accurate and the adjustment range is expanded. It becomes possible. For this reason, the manufacturing tolerance and assembly accuracy of the parts to be used can be roughened, and the manufacturing efficiency can be improved.

  In the above-described configuration, the liquid ejecting head can adjust the alignment of the nozzle forming member in the nozzle forming surface direction with respect to the discharge target by rotating about the center of the nozzle forming surface with respect to the carriage. It is desirable.

  According to this configuration, the rotation center of the liquid ejecting head does not deviate from the center of the nozzle formation surface with respect to the carriage, so that the alignment in the nozzle formation surface direction of the nozzle formation member with respect to the discharge target can be adjusted with high accuracy. Can do. Thereby, it is possible to prevent the landing position of the droplet on the discharge target from being shifted.

  In the above configuration, it is preferable that the carriage includes a head rotation mechanism that rotates the liquid ejecting head in a nozzle forming surface direction while sliding the sliding portion on the sliding portion.

  According to this configuration, since the carriage is provided with the head rotating mechanism, the liquid ejecting head can be easily rotated in the nozzle forming surface direction while sliding the sliding portion of the liquid ejecting head on the sliding portion of the carriage. . Thereby, the workability of alignment adjustment of the nozzle formation surface of the liquid jet nozzle can be improved.

  In this configuration, the liquid ejecting head has a plurality of teeth arranged in parallel along the virtual circle, and the head rotating mechanism has a gear meshing with the teeth, and the liquid is obtained by rotating the gear. It is desirable to rotate the ejection head.

  According to this configuration, the head rotating mechanism in which the gear is meshed with the plurality of teeth arranged in parallel along the virtual circle of the liquid ejecting head is provided. Therefore, the liquid ejecting head can be reliably rotated by rotating the gear. Can be moved. Thereby, the alignment of the nozzle forming surface can be adjusted using the meshing position of the teeth as a guideline, and workability can be further improved.

  In the above configuration, the liquid ejecting head includes a plurality of teeth arranged in parallel along the virtual circle, and the head rotating mechanism includes a worm that meshes with the teeth, and rotating the worm gear allows the rotation of the worm gear. It is desirable to rotate the liquid ejecting head.

  According to this configuration, since the head rotating mechanism in which the worm is engaged with the plurality of teeth provided as the worm wheel of the liquid ejecting head is provided, the liquid ejecting head can be rotated with a large reduction ratio. Thereby, the alignment of the nozzle formation surface of the liquid jet nozzle can be finely adjusted, and the adjusted state can be maintained without requiring a stopper or the like.

  The best mode for carrying out the present invention will be described below with reference to the accompanying drawings. In the embodiments described below, various limitations are made as preferred specific examples of the present invention. However, the scope of the present invention is not limited to the following description unless otherwise specified. However, the present invention is not limited to these embodiments. In the following description, an ink jet printer that is an ink jet recording apparatus (hereinafter simply referred to as a printer) is taken as an example of the liquid ejecting apparatus of the invention.

  1 is a perspective view of a printer according to the present embodiment, FIG. 2 is a perspective view of a carriage as viewed from below, FIG. 3 is an exploded perspective view of a recording head 1, and FIG. It is. As shown in FIG. 1, the printer 1 includes a carriage 4 that is supported by a guide shaft 3 provided as a guide member in the left-right direction in the housing 2 and is guided and moved in the left-right direction, that is, the main scanning direction. The carriage 4 is mounted with a cartridge holder that accommodates and holds the ink cartridge, and a recording head that is a kind of liquid ejecting head that ejects ink, which is a kind of liquid introduced from the ink cartridge, as ink droplets (droplets). 5 is stored. The carriage 4 is provided with a head scanning mechanism that moves together with the housed recording head 5, and this head scanning mechanism includes a pulse motor 6, a timing belt 7, a drive pulley 8, and an idle pulley 9. The printer 1 includes a paper feed mechanism that rotates a paper feed roller by driving a motor 10 to feed a recording paper 11 that is a kind of print recording medium in a direction (sub-scanning direction) orthogonal to the main scanning direction. The printer 1 drives a pulse motor 6 under the control of a printer controller (not shown) to eject ink droplets from the nozzle openings of the recording head 5 while reciprocating the carriage 4 in the main scanning direction, and to record paper. 11 is sent in the sub-scanning direction so that characters, figures, etc. are recorded on the recording paper 11.

  The carriage 4 is a box-shaped member with an open top surface formed by molding a thermoplastic, and has a lid 4a for opening and closing the top surface opening. As shown in FIG. 2, a part of the recording head 5 is inserted into the bottom portion 4b. An opening 4c for attaching the nozzle plate to the recording paper is opened. Further, a bearing portion 4e fitted to the guide shaft 3 is provided on the outer surface of the rear side wall portion 4d of the carriage 4, and the carriage 4 can be reciprocated along the guide shaft 3 in the main scanning direction. A cartridge holder is attached inside the carriage 4, and an ink cartridge is attached to the cartridge holder.

  The recording head 5 housed in the carriage 4 includes a cartridge base 12 (hereinafter referred to as “base”), a driving substrate 15, a case 20, a flow path unit 21, and an actuator unit 23 as main components. Yes. The base 12 is formed of, for example, a synthetic resin such as an epoxy resin, and a plurality of ink introduction needles 14 are attached to the upper surface of the base 12 with a filter 13 interposed therebetween. These ink introduction needles 14 are mounted with ink cartridges (not shown) that store ink (a kind of liquid).

  The drive substrate 15 is provided with a wiring pattern for supplying a drive signal from the printer main body (not shown) to the piezoelectric vibrator 29, a connector 16 for connection with the printer main body, a resistor, a capacitor, and the like. The electronic parts 18 and the like are mounted. A wiring member such as an FFC (flexible flat cable) is connected to the connector 16, and the driving substrate 15 receives a driving signal from the printer main body side via the FFC. The driving substrate 15 is disposed on the bottom surface side of the base 12 opposite to the ink introduction needle 14 with a sheet 17 functioning as a packing interposed.

  The case 20 is a synthetic resin hollow box-like member, the flow path unit 21 is joined to the front end surface (lower surface), and the actuator unit 23 is accommodated in the accommodating space 22 formed inside, The drive substrate 15 is attached to the substrate attachment surface 24 opposite to the flow path unit 21 side. Further, a head cover 26 made of a metal thin plate member is attached to the front end surface side of the case 20 so as to surround the peripheral edge portion from the outside of the flow path unit 21. The head cover 26 functions to protect the flow path unit 21 and the case 20 and adjust the nozzle plate 35 of the flow path unit 21 to the ground potential to prevent troubles such as noise caused by static electricity generated from recording paper or the like. .

  The actuator unit 23 includes a plurality of piezoelectric vibrators 29 (a kind of pressure generating elements) arranged in a comb shape, a fixing plate 30 to which the piezoelectric vibrators 29 are joined, and a drive signal from the drive substrate 15. Is formed of a wiring member 31 such as a TCP (tape carrier package) or the like. Each piezoelectric vibrator 29 is bonded to the fixed plate 30 on the fixed end side, and protrudes outward from the front end surface of the fixed plate 30 on the free end side. That is, each piezoelectric vibrator 29 is mounted on the fixed plate 30 in a so-called cantilever state, and the fixed plate 30 that supports each piezoelectric vibrator 29 is made of, for example, stainless steel having a thickness of about 1 mm. The actuator unit 23 is housed and fixed in the housing space 22 by bonding the back surface of the fixed plate 30 to the inner wall surface of the case that defines the housing space 22.

  The flow path unit 21 is produced by joining and integrating a flow path unit constituent member made up of an elastic plate 33, a flow path forming substrate 34, and a nozzle plate 35 with an adhesive. This is a member that forms a series of ink flow paths (corresponding to liquid flow paths) from the chamber 37 (common liquid chamber) to the nozzle opening 40 through the ink supply port 38 and the pressure chamber 39. The pressure chamber 39 is formed as an elongated chamber in a direction orthogonal to the direction in which the nozzle openings 40 are arranged (nozzle row direction). The common ink chamber 37 is a chamber into which ink from the ink introduction needle 14 inserted into the ink cartridge is introduced. The ink introduced into the common ink chamber 37 is supplied to each pressure chamber 39 through the ink supply port 38.

  The nozzle plate 35 (a kind of nozzle forming member) disposed at the bottom of the flow path unit 21 has a plurality of nozzle openings 40 in the paper feed direction (sub-scanning direction) at a pitch (for example, 180 dpi) corresponding to the dot formation density. It is a thin metal plate made in a row. The nozzle plate 35 is made of, for example, a stainless steel plate material, and a plurality of rows of nozzle openings 40 (nozzle rows) are arranged in the scanning direction (main scanning direction) of the recording head 5. One nozzle row is composed of, for example, 180 nozzle openings 40. The recording head 5 is configured to be able to eject, for example, ink of a total of six colors of cyan (C), light cyan (LC), magenta (M), light magenta (LM), yellow (Y), and black (K). A total of six nozzle rows 51a to 51f (see FIG. 6) are formed on the nozzle plate 35 in correspondence with these colors.

  In the recording head 5, when a drive signal is supplied from the drive substrate 15 to the piezoelectric vibrator 29 through the wiring member 31, the piezoelectric vibrator 29 expands and contracts in the element longitudinal direction. It moves in the direction close to or away from 39. As a result, the volume of the pressure chamber 39 changes, and pressure fluctuation occurs in the ink in the pressure chamber 39. An ink droplet (a kind of droplet) is ejected from the nozzle opening 40 due to this pressure fluctuation.

  Such a recording head 5 is housed in the carriage 4, and a plurality of abutting portions that abut against each other and regulate the positional relationship are provided between them. When the recording head 5 is tightened on the carriage 4 with a screw, the recording head A nozzle plate 35 which is a kind of nozzle forming member 5 is attached to the carriage 4 with high parallelism.

Further, the guide shaft 3 is provided in a state in which a highly accurate parallelism is ensured with respect to the recording paper 11. Therefore, when the carriage 4 is attached by the guide shaft 3, the nozzle plate 35 of the recording head 5 is opposed to the recording paper 11 conveyed below the carriage 4 with high parallelism, thereby improving the printing accuracy. Can do.
In such a state of being attached to the carriage 4, the nozzle plate 35 of the recording head 5 can be opposed to the recording paper 11 with high parallelism, but each nozzle row 51 of the nozzle plate 35 moves in the direction of movement of the carriage 4. If it is not perpendicular to the (main scanning direction) (parallel to the sub-scanning direction), that is, if it is twisted, the landing position of the ink droplets may shift and the image quality of the recorded image may deteriorate.

  Therefore, as shown in FIGS. 5, 6, and 7, an alignment adjustment mechanism 50 (hereinafter simply referred to as “alignment adjustment mechanism 50”) that adjusts the inclination (alignment) of the nozzle row 51 of the nozzle plate 35, which is a kind of nozzle forming member, with respect to the main scanning direction. An adjustment mechanism 50 is provided, and alignment adjustment is performed by rotating the recording head 5 around the axis perpendicular to the plane of the nozzle plate 35 (in the nozzle formation surface direction) with respect to the carriage 5. That is, in this adjustment mechanism 50, the outermost two nozzle rows 51a among the nozzle rows 51a to 51f formed in a plurality of rows (for example, 6 rows in the illustrated example) on the nozzle plate 35 which is a kind of nozzle forming member. , 51f and the portion surrounded by the front and rear ends of each nozzle row 51 is a nozzle forming surface 52, and the alignment is adjusted with the center O of the nozzle forming surface 52 as the center of rotation. As a result, the alignment can be adjusted without moving the center O of the nozzle forming surface 52, which is a kind of head center of the recording head 5, and the deflection width in the rotational direction of the nozzle row farthest from the center O is minimized. be able to. Hereinafter, this point will be described in detail.

  As the adjusting mechanism 50, the recording head 5 is provided with a sliding portion 53 in an arc shape along a circle concentric with a virtual circle D1 centered on the center O of the nozzle forming surface 52. In this embodiment, the recording head is provided. 5 are formed as concave grooves that open downward on the lower surface of the flange portion 5a that protrudes from both sides of the outer portion 5 and is integrally formed. Further, the carriage 4 is provided with a sliding portion 54 in an arc shape along a circle concentric with the virtual circle D1 centering on the center O of the nozzle forming surface 52. In the present embodiment, the carriage 4 has a bottom surface 4b on the bottom surface 4b. A protrusion is formed on the inner upper surface (recording head mounting surface), and the sliding portion 53 of the recording head 5 is slidably engaged. As a result, the recording head (liquid ejecting head) 5 is mounted on the carriage 4 with the sliding portion 53 engaged with the sliding portion 54, so that the center O of the nozzle forming surface 52 with respect to the carriage 4. It is possible to rotate the nozzle plate (nozzle forming member) 35 in the direction of the nozzle forming surface about the rotation center. Even if the recording head 5 is rotated with respect to the carriage 4, the recording head 5 is rotated by being guided by the concentric sliding portion 53 and the sliding portion 54, so that the nozzle forming surface 52 of the nozzle plate 35 is rotated. The center O is not displaced. Therefore, compared with the conventional case where the rotation center is provided outside the nozzle plate 35 and the alignment is adjusted, the deflection width (adjustment amount) in the rotation direction for each nozzle row greatly varies depending on the distance from the rotation center. Therefore, the adjustment can be performed with high accuracy and the adjustment range can be expanded. In addition, since the adjustment can be performed with high accuracy even if the adjustment range of the alignment is expanded, the tolerances and assembly accuracy of the components constituting the recording head 5 can be roughened, and the manufacturing efficiency can be improved. The formation width of the sliding portion 53 of the recording head 5 and the sliding portion 54 of the carriage 4 is not limited to the width of the nozzle formation surface in the illustrated example, and the center O of the nozzle formation surface 52 is the same. What is necessary is just to form so that it can rotate mutually, without shifting. Further, the center O of the nozzle forming surface 52 is not limited to a strict center, and may have a width within a range in which the effect of the present invention can be obtained, and may be a central portion of the nozzle forming surface 52.

  The adjustment mechanism 50 is provided with a head rotation mechanism 55 that rotates the recording head 5 in the nozzle forming surface direction while sliding the sliding portion 53 along the sliding portion 54 on the carriage 4. As the head rotation mechanism 55, for example, a plurality of teeth that are arranged in parallel along an arc concentric with the virtual circle D1 is formed on the recording head 5, and a gear that meshes with the teeth is provided on the carriage 4, and this gear is used. By rotating, the recording head 5 is rotated. That is, as the head rotating mechanism 55, a plurality of teeth 56 of a part of the spur gear constituting the external spur gear are formed on the outer surface of the flange portion 5 a of the recording head 5, and the pinion gear 57 that meshes with the teeth 56. Is provided on the carriage 4. As a result, by rotating the pinion gear 57, the recording head 5 can be rotated about the center O of the nozzle forming surface 52 with respect to the carriage 4, and the meshing positions of the plurality of teeth 56 and the pinion gear 57. By changing the pitch of the teeth 56 as a guide, the adjustment amount of alignment can be visually observed, and workability can be improved. That is, the recording head 5 is temporarily assembled with respect to the carriage 4, and in this state, the printer is activated to print a pattern for alignment adjustment. From this printed state, the recording head 5 is rotated by, for example, two teeth 56 in the direction of correcting the alignment, and the alignment adjustment pattern is printed again. From the result, alignment adjustment is performed so that an optimum pattern for alignment adjustment can be obtained by an operation such as returning one tooth 56 or rotating one tooth 56 in the direction of correcting the alignment.

  The head rotating mechanism 55 is provided with a disk-like knob 58 for operation on the rotating shaft of the pinion gear 57. Thereby, the operation of adjusting the alignment of the nozzle row 51 of the recording head 5 performed by rotating the pinion gear 57 is facilitated, and the workability can be improved. This knob 58 has a gear-like unevenness 59 formed on the outer periphery of the knob 58 in order to fix and hold the position thereof, and is unnecessary as the stopper roller 61 biased by the spring 60 is pressed against the unevenness 59. Thus, the pinion gear 57 does not rotate and the alignment adjustment state can be maintained. Thereby, it is possible to prevent the recording head 5 from rotating unnecessarily during alignment adjustment. After the alignment adjustment, the stopper roller 61 is not required by fixing the three positions of the recording head 5 to the carriage 4 with the same screws as before, but the stopper roller 61 is not necessary, but it is used for alignment adjustment after the replacement of the recording head. Is done.

  Further, as the head rotation mechanism 55A of the adjustment mechanism 50, as shown in the second embodiment shown in FIGS. 8 and 9, for example, a plurality of head rotation mechanisms 55A are arranged in parallel along the arc concentric with the virtual circle D1. It is also possible to rotate the recording head 5 by forming teeth as part of teeth of the worm wheel and rotatably providing a worm meshing with the teeth on the inner wall of the carriage 4 and rotating the worm. That is, as the head rotation mechanism 55A, for example, a plurality of teeth 56A that are part of the teeth constituting the worm wheel are formed on the outer surface of the flange portion 5a of the recording head 5, and a part of the worm wheel is formed. A worm 57 </ b> A that meshes with the plurality of teeth 56 </ b> A is provided on the carriage 4. Accordingly, the recording head 5 can be rotated about the center O of the nozzle forming surface 52 with respect to the carriage 4 by rotating the worm 57 </ b> A. As a result, the reduction ratio can be increased as compared with the case of the spur gear and the pinion gear, and the recording head 5 can be rotated little by little with respect to the carriage 4 to finely adjust the alignment. Further, since the head rotation mechanism 55A is configured by the worm gear of the worm 57A and a part of the teeth 56a of the worm wheel, the head rotation mechanism 55A cannot be rotated from the worm wheel side, that is, the recording head 5 side. The adjustment state can be maintained. Further, in this head rotation mechanism 55A, the rotation knob of the worm 57A is passed through the outside of the carriage 4 and the operation knob 58A is attached, so that the alignment adjustment can be performed from the outside of the carriage 4.

  As described above, in this printer 1, the slid portion 54 of the carriage 4 and the sliding portion 53 of the recording head 5 housed in the carriage 4 are both concentric with the center O of the nozzle forming surface 52. And the recording head 5 is always rotated relative to the carriage 4 around the center O of the nozzle forming surface 52 as the center of rotation, so that the nozzle plate 35 of the recording head 5 is connected to the nozzle forming surface. Even if it rotates in the direction, the center O of the nozzle forming surface 52 does not shift with respect to the carriage 4, so that both the adjustment resolution can be improved and the adjustment range can be expanded. Therefore, even if the manufacturing tolerance and assembly accuracy of the parts to be used are roughened, it can be dealt with by adjusting the alignment thereafter, and the manufacturing efficiency can be improved. Further, by adjusting the alignment of the nozzle forming member in the nozzle forming surface direction, it is possible to prevent the landing position of the liquid on the discharge target from being shifted, and the image quality of the recorded image can be improved.

  The head rotation mechanism is not limited to a mechanism that uses a spur gear or a worm gear, and any mechanism that can relatively rotate between the carriage and the liquid ejecting head may be used. The sliding portion and the sliding portion that is guided by engaging with the sliding portion are not limited to the case where the sliding portion is formed in a convex shape and the sliding portion is engaged in a concave shape. These may be provided in reverse, as long as they can move relative to each other while sliding.

1 is a schematic perspective view of an ink jet recording apparatus (printer). It is the schematic perspective view seen from the downward direction of a carriage. FIG. 2 is an exploded perspective view illustrating a configuration of a recording head. FIG. 3 is a cross-sectional view of a main part for explaining the configuration of a recording head. It is a front view of a carriage and a recording head. It is a bottom view of a carriage and a recording head. FIG. 3 is a cross-sectional view of a carriage and a recording head. It is a front view of a carriage and a recording head. It is a bottom view of a carriage and a recording head.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Inkjet recording device (printer), 2 housing, 3 guide shaft, 4 carriage, 4a bottom part, 4c opening part, 5 recording head, 6 pulse motor, 7 timing belt, 8 drive pulley, 9 idle pulley, 10 motor, DESCRIPTION OF SYMBOLS 11 Recording paper, 12 Cartridge base, 13 Filter, 14 Ink introduction needle, 15 Driving board, 16 Connector, 17 Sheet, 18 Electronic component, 20 Case, 21 Flow path unit, 22 Housing empty part, 23 Actuator unit, 24 Substrate mounting surface, 26 head cover, 29 piezoelectric vibrator, 30 fixing plate, 31 flexible cable, 33 elastic plate, 34 flow path forming substrate, 35 nozzle plate, 37 common ink chamber, 38 ink supply port, 39 pressure chamber, 40 nozzle Aperture, 50 alignment adjustment mechanism, 51, 51a-51 Slurry row, 52 Nozzle forming surface, 53 Sliding part, 54 Sliding part, 55, 55A Head rotation mechanism, 56, 56A Multiple teeth, 57 Pinion gear, 57A Worm, 58, 58A Knob, 59 Gear-shaped Concavity and convexity, 60 spring, 61 stopper roller, center of nozzle forming surface, D1 virtual circle

Claims (5)

A nozzle forming member in which a nozzle row formed by arranging a plurality of nozzle openings is formed, and a series of liquid flow paths from a common liquid chamber through the pressure chamber to the nozzle opening, and the pressure generating source A liquid ejecting head capable of ejecting the liquid in the pressure chamber as droplets from the nozzle opening by causing pressure fluctuation in the liquid in the pressure chamber;
A carriage that accommodates the liquid ejecting head in a state where the nozzle forming surface of the nozzle forming member is exposed,
The liquid jet head has a sliding portion formed in an arc shape along a virtual circle concentric with the center of the nozzle forming surface of the nozzle forming member,
The carriage has a sliding portion that is formed in an arc shape along the virtual circle and that guides the sliding portion in a slidable manner.
The liquid ejecting head is mounted on the carriage in a state where the sliding portion is engaged with the sliding portion, and the nozzle forming member is formed as a nozzle with the center of the nozzle forming surface as a rotation center with respect to the carriage. A liquid ejecting apparatus configured to be rotatable in a surface direction.   The liquid ejecting head is capable of adjusting an alignment in a nozzle forming surface direction of the nozzle forming member with respect to a discharge target by rotating with respect to the carriage about the center of the nozzle forming surface as a rotation center. The liquid ejecting apparatus according to claim 1.   The said carriage is provided with the head rotation mechanism which rotates the said liquid jet head to a nozzle formation surface direction, sliding the said sliding part on the said to-be-slid part. The liquid ejecting apparatus according to 1. The liquid ejecting head has a plurality of teeth arranged in parallel along the virtual circle,
The liquid ejecting apparatus according to claim 3, wherein the head rotating mechanism includes a gear meshing with the teeth, and the liquid ejecting head is rotated by rotating the gear. The liquid ejecting head has a plurality of teeth arranged in parallel along the virtual circle,
The liquid ejecting apparatus according to claim 3, wherein the head rotating mechanism includes a worm that meshes with the teeth, and rotates the liquid ejecting head by rotating these worm gears.

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