JP6855692B2 - Liquid discharge head, liquid discharge unit, liquid discharge device - Google Patents

Description

The present invention relates to a liquid discharge head, a liquid discharge unit, and a device for discharging a liquid.

In the liquid discharge head, the liquid is supplied from an external main tank or liquid cartridge to the common liquid chamber that supplies the liquid to the individual liquid chambers.

Conventionally, a chamber provided with a nozzle for ejecting droplets in the form of droplets, a piezoelectric element that can be displaced in a direction that changes the volume in the chamber, and a liquid chamber for storing a liquid supplied from the liquid supply unit side. A restrictor section that communicates the liquid chamber and the chamber, a movable piece that can move in a direction that changes the flow path area of the restrictor section, and an actuator that moves the movable piece in a direction that changes the flow path area of the restrictor section. (Patent Document 1).

Japanese Unexamined Patent Publication No. 2011-062907

By the way, when liquid is supplied to the common liquid chamber from the outside through the liquid supply path, the amount of liquid supplied per unit time differs depending on the viscosity of the supplied liquid, so if the liquid used changes, the supply of liquid will be insufficient. It will occur.

Therefore, there is a problem that the head design must be redone, such as changing the flow path resistance of the liquid supply path according to the liquid to be used.

The present invention has been made in view of the above problems, and an object of the present invention is to improve versatility for liquid types.

In order to solve the above problems, the liquid discharge head according to the present invention is
A liquid supply path that supplies liquid from the outside to a common liquid chamber that supplies liquid to multiple individual liquid chambers through which multiple nozzles that discharge liquid communicate.
An elastically deformable shape-variable member that forms at least a part of the wall surface of the liquid supply path,
A shape-retaining means for fixing and holding the shape-variable member in an elastically deformed state is provided.
The shape-retaining means includes one that adjusts and fixes the shape-variable member to the liquid supply member side that forms a part of the liquid supply path.
The liquid supply member is provided with the liquid supply path in which a part of the wall surface is formed by the shape-variable member .
The shape-retaining means
A movable member arranged with the shape-variable member sandwiched between the frame member of the head,
A fixing means for moving and fixing the movable member to the frame member side is provided.
The movable member is provided with the liquid supply path in which a part of the wall surface is formed by the shape-variable member .

According to the present invention, versatility for liquid types can be improved.

It is sectional drawing which follows the nozzle arrangement direction (common liquid chamber longitudinal direction) of the liquid discharge head which concerns on 1st Embodiment of this invention. It is sectional drawing in the direction orthogonal to the nozzle arrangement direction of the head corresponding to the cross section along the line AA of FIG. It is also a plan explanatory view seen from the nozzle side. It is a plane explanatory view of a liquid supply member, a shape variable member, and a movable member. It is sectional drawing around the supply flow path which provides the operation explanation of the same embodiment. It is sectional drawing around the liquid supply path of the liquid discharge head which concerns on 2nd Embodiment of this invention. It is a cross-sectional explanatory view which is also used for explanation of operation. It is sectional drawing which follows the common liquid chamber longitudinal direction of the liquid discharge head which concerns on 3rd Embodiment of this invention. It is sectional drawing which follows the common liquid chamber longitudinal direction of the liquid discharge head which concerns on 4th Embodiment of this invention. It is a main part plan explanatory view of an example of the apparatus which discharges a liquid which concerns on this invention. It is explanatory drawing of the main part of the apparatus. It is a plane explanatory view of the main part of another example of the liquid discharge unit which concerns on this invention. It is a front explanatory view of still another example of the liquid discharge unit which concerns on this invention.

Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. The liquid discharge head according to the first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a cross-sectional explanatory view along the nozzle arrangement direction (common liquid chamber longitudinal direction) of the head, and FIG. 2 is a cross section in a direction orthogonal to the nozzle arrangement direction of the head corresponding to the cross section along the line AA of FIG. Explanatory drawing, FIG. 3 is a plan explanatory view seen from the nozzle side.

The liquid discharge head includes a head main body 101 including a pressure generating means, a frame member 102 that holds the head main body 101 and constitutes a frame, and a liquid supply member 201.

The head main body 101 is composed of a nozzle plate 1, a flow path plate 2, a diaphragm member 3, a piezoelectric element 4 as a pressure generating means, and a holding substrate 5. The holding substrate 5 of the head main body 101 and the frame member 102 are joined. The head main body 101 is not limited to the one in which each member is integrated into an independent member (unit) and then joined to the frame member 102.

A plurality of nozzles 11 for discharging a liquid are formed on the nozzle plate 1. For example, it has four nozzle rows in which a plurality of nozzles 11 are arranged (two rows in FIG. 2 are half).

The flow path plate 2 forms, together with the nozzle plate 1 and the diaphragm member 3, an individual liquid chamber 12 through which the nozzle 11 communicates, a fluid resistance portion 13 through which the individual liquid chamber 12 communicates, and a liquid introduction portion 14 through which the fluid resistance portion 13 communicates. There is. The liquid introduction portion 14 communicates with the common liquid chamber 20 formed by the frame member 102 via the filter portion 15 and the opening 51 of the holding substrate 5.

The diaphragm member 3 is a wall surface member that forms a deformable vibration region (this is referred to as a “diaphragm”) 30 that forms a part of the wall surface of the individual liquid chamber 12. Then, on the surface of the vibrating plate 30 opposite to the individual liquid chamber 12, a piezoelectric element 4 is provided integrally with the vibrating plate 30, and the vibrating plate 30 and the piezoelectric element 4 form a piezoelectric actuator, and each piezoelectric element 4 The drive IC 500 for driving is arranged between two rows of piezoelectric element rows.

The holding substrate 5 is formed with a recess 52 in a region corresponding to the diaphragm 30. The recess 52 forms a space for protecting the piezoelectric element 4.

The frame member 102 is joined to the surface of the head main body 101 opposite to the nozzle plate 1 to form a common liquid chamber 20 that supplies liquid to a plurality of individual liquid chambers 12.

Further, the frame member 102 is formed with a recess that accommodates the damper member 103 and serves as a damper chamber 104. The damper member 103 includes a reconstructably deformable damper 131 that forms a wall surface on the side opposite to the individual liquid chamber side of the common liquid chamber 20, and a holding member 132 that holds the damper 131.

Further, the frame member 102 has a connecting pipe portion 24 having a connecting pipe 25 leading to a liquid supply passage 200 for supplying liquid from the outside to the common liquid chamber 20 at the center in the common liquid chamber longitudinal direction (nozzle arrangement direction). Is provided.

A liquid supply member 201 that forms a part of the liquid supply path 200 that supplies the liquid from the outside to the common liquid chamber 20 is connected to the frame member 102. The liquid supply member 201 and the connecting pipe portion 24 of the frame member 102 are connected via the packing member 28.

Next, the details of the members constituting the liquid supply path will be described with reference to FIG. FIG. 4 is a plan explanatory view of the liquid supply member, the shape-variable member, and the movable member. Since the liquid supply path is shown more concretely than in FIG. 1, the shape is not the same as that in FIG.

The liquid supply path 200 of the liquid supply member 201 includes a liquid supply path 200A which is a through hole penetrating the liquid supply member 201 and a liquid supply path in which a groove provided in the liquid supply member 201 is closed by a shape-variable member 204. It is composed of 200B. That is, the liquid supply member 201 is provided with a liquid supply path 200B in which a part of the wall surface is formed by the shape-variable member 204.

Here, the shape-variable member 204 is an elastically deformable member that forms one wall surface of the liquid supply path 200B. The shape-variable member 204 is formed with a liquid supply path 200C which is a through hole leading to the liquid supply path 200B.

As the material of the shape-variable member 204, any material can be used from the viewpoint of required rigidity and workability. Any material can be selected from fluororubber, rubber materials such as EPDM, silicone-based, urethane-based, those using biomass resources, resins, resins containing glass fibers, composite members, and the like. The elastic modulus of the shape-variable member 204 is preferably several MPa to several tens MPa or less.

Then, the shape holding means 208 for fixing and holding the shape-variable member 204 in an elastically deformed state is provided.

The shape holding means 208 includes a movable member 205 arranged so as to sandwich the liquid supply member 201 and the shape variable member 204, and a headed screw 206 which is a fixing means for moving and fixing the movable member 205 to the liquid supply member 201 side. It is composed of. The headed screw 206 penetrates the through hole 213 of the movable member 205 and the through hole 212 of the shape-variable member 204, and is screwed into the screw hole 211 of the liquid supply member 201 to be tightened.

By screwing the screw 206 of the shape holding means 208, the movable member 205 pushes the shape variable member 204 toward the liquid supply member 201, and by changing the screwing amount of the screw 206, the amount of movement to the movable member 205, that is, the shape variable member The amount of deformation of 204 can be adjusted.

Then, by moving the movable member 205 and stopping the screwing of the screw 206 in a state where the shape-variable member 204 is deformed by a required amount, the shape-variable member 204 is fixed in an elastically deformed state and mechanically held. can do.

The movable member 205 is also formed with a liquid supply path 200D formed of a through hole leading to the liquid supply path 200C, and a connecting portion 203 is provided at the inlet portion of the liquid supply path 200D. A tube or the like for sending a liquid from an external liquid storage portion is connected to the connecting portion 203.

Next, the operation of this embodiment will be described with reference to FIG. FIG. 5 is a cross-sectional explanatory view around the supply flow path provided for the same description.

As shown in FIG. 5A, by screwing a plurality of screws 206 with the same screwing amount, a part of the shape-variable member 204 is pushed into the groove of the liquid supply member 201 forming the liquid supply path 200B. Is done. At this time, the liquid supply path 200B has, for example, a height H1.

Further, by further screwing a plurality of screws 206 from the position shown in FIG. 5A with the same screwing amount, a part of the shape variable member 204 forms the liquid supply path 200B as shown in FIG. 5B. It is further pushed into the groove of the liquid supply member 201. At this time, the liquid supply path 200B has, for example, a height of H2 (H2 <H1).

Then, in any of the states, by fastening the plurality of screws 206 at the screwed positions, the shape-variable member 204 is fixed and held at the pushed position (state) in the same manner as in the case of plastic deformation.

At this time, the fluid resistance of the liquid supply path 200B changes depending on the amount of pushing of the shape-variable member 204.

In this way, since the fluid resistance of the liquid supply path 200B can be changed, the fluid resistance can be changed according to the viscosity of the liquid used, and can be fixed and maintained in the changed state.

As a result, liquids having different viscosities can be used without redesigning the head.

Further, since the shape-variable member 204 is deformed along the step of the liquid supply member 201, the shape-variable member 204 is deformed so that the liquid supply path 200B does not have a step, so that traps of air bubbles and the like may increase. Absent.

Next, the second embodiment of the present invention will be described with reference to FIGS. 6 and 7. FIG. 6 is a cross-sectional explanatory view around the liquid supply path of the liquid discharge head according to the same embodiment, and FIG. 7 is a cross-sectional explanatory view which is also used for explaining the operation.

Here, the plurality of screws 206 are arranged outside the shape-variable member 204 and do not penetrate the shape-variable member 204.

With this configuration, as shown in FIG. 7, the liquid supply path 200B has a shape having an inclination that lowers the height on the downstream side by varying the screwing amount of the plurality of screws 206 depending on the location. Can be done.

As a result, the flow velocity can be increased toward the downstream side when performing a purging operation or the like, and the bubble discharge property is improved.

Next, the third embodiment of the present invention will be described with reference to FIG. FIG. 8 is an explanatory cross-sectional view taken along the longitudinal direction of the common liquid chamber of the liquid discharge head according to the same embodiment.

In the present embodiment, the shape-retaining means 208 is a fixing means for fixing the movable member 205 arranged so as to sandwich the liquid supply member 201 and the shape-variable member 204, and the movable member 205 by moving it toward the liquid supply member 201. It is composed of a cam 216.

The cam 216 can rotate around the shaft 217 as a rotation axis, and can be fixed at an arbitrary position. The shaft 217 can be rotated manually, for example.

As a result, the cam 216 is rotated to move the movable member 205, and the position of the cam 216 is fixed in a state where the shape-variable member 204 is deformed by a required amount, so that the shape-variable member 204 is elastically deformed. Can be fixed and mechanically held.

Next, a fourth embodiment of the present invention will be described with reference to FIG. FIG. 9 is an explanatory cross-sectional view taken along the longitudinal direction of the common liquid chamber of the liquid discharge head according to the same embodiment.

In the present embodiment, the shape-variable member 304 forms the liquid supply path 300A of the liquid supply paths 300, and the liquid supply path 300A of the shape-variable member 304 is connected to the connecting pipe portion 24 leading to the common liquid chamber 20 of the frame member 102. I understand.

Then, the shape holding means 308 moves the movable member 305 arranged with the shape variable member 304 sandwiched between the frame member 102 (including the connecting portion 24) and the movable member 305 toward the frame member 102 side. It is composed of a headed screw 306 which is a fixing means for fixing. Similar to the headed screw 206 of the first embodiment, the headed screw 306 penetrates the through hole of the movable member 205 and the through hole of the shape-variable member 304, and is screwed into the screw hole of the frame member 102 and tightened. There is.

The movable member 305 is provided with a groove portion serving as a liquid supply path 300B in which a part of the wall surface is formed by the shape-variable member 304, and a through hole forming a liquid supply path 300C leading to the liquid supply path 300B. A connecting portion 303 is provided at the inlet portion of the liquid supply path 300C.

Therefore, by screwing the screw 306 of the shape holding means 308, the movable member 305 pushes the shape variable member 304 toward the frame member 102 side, and by changing the screwing amount of the screw 306, the amount of movement to the movable member 305, that is, the shape variable member The amount of deformation of 304 can be adjusted.

Then, by moving the movable member 305 and stopping the screwing of the screw 306 in a state where the shape-variable member 304 is deformed by a required amount, the shape-variable member 304 is fixed in an elastically deformed state and mechanically held. can do.

Since it is configured in this way, the fluid resistance of the liquid supply path 300B can be changed as in the above embodiment, so that the fluid resistance is changed according to the viscosity of the liquid to be used and fixed and maintained in the changed state. can do.

As a result, liquids having different viscosities can be used without redesigning the head.

Further, the sealing property can be ensured without interposing the packing member as in the first embodiment between the shape-variable member 304 and the connecting pipe portion 24.

Next, an example of the device for discharging the liquid according to the present invention will be described with reference to FIGS. 10 and 11. FIG. 10 is a plan view of the main part of the device, and FIG. 11 is a side view of the main part of the device.

This device is a serial type device, and the carriage 403 is reciprocated in the main scanning direction by the main scanning moving mechanism 493. The main scanning movement mechanism 493 includes a guide member 401, a main scanning motor 405, a timing belt 408, and the like. The guide member 401 is bridged over the left and right side plates 491A and 491B to movably hold the carriage 403. Then, the carriage 403 is reciprocated in the main scanning direction by the main scanning motor 405 via the timing belt 408 bridged between the drive pulley 406 and the driven pulley 407.

The carriage 403 is equipped with a liquid discharge unit 440 in which the liquid discharge head 404 and the head tank 441 according to the present invention are integrated. The liquid discharge head 404 of the liquid discharge unit 440 discharges liquids of, for example, yellow (Y), cyan (C), magenta (M), and black (K). Further, the liquid discharge head 404 is mounted by arranging a nozzle array composed of a plurality of nozzles in the sub-scanning direction orthogonal to the main scanning direction and directing the discharge direction downward.

The liquid stored in the liquid cartridge 450 is supplied to the head tank 441 by the supply mechanism 494 for supplying the liquid stored outside the liquid discharge head 404 to the liquid discharge head 404.

The supply mechanism 494 includes a cartridge holder 451 which is a filling portion for mounting the liquid cartridge 450, a tube 456, a liquid feeding unit 452 including a liquid feeding pump, and the like. The liquid cartridge 450 is detachably attached to the cartridge holder 451. Liquid is sent from the liquid cartridge 450 to the head tank 441 by the liquid feeding unit 452 via the tube 456.

This device includes a transport mechanism 495 for transporting the paper 410. The transport mechanism 495 includes a transport belt 412, which is a transport means, and a sub-scanning motor 416 for driving the transport belt 412.

The transport belt 412 attracts the paper 410 and transports it at a position facing the liquid discharge head 404. The transport belt 412 is an endless belt, and is hung between the transport roller 413 and the tension roller 414. Adsorption can be performed by electrostatic adsorption, air suction, or the like.

Then, the transport belt 412 orbits in the sub-scanning direction by rotationally driving the transport roller 413 via the timing belt 417 and the timing pulley 418 by the sub-scanning motor 416.

Further, on one side of the carriage 403 in the main scanning direction, a maintenance / recovery mechanism 420 for maintaining / recovering the liquid discharge head 404 is arranged on the side of the transport belt 412.

The maintenance / recovery mechanism 420 includes, for example, a cap member 421 that caps the nozzle surface (the surface on which the nozzle is formed) of the liquid discharge head 404, a wiper member 422 that wipes the nozzle surface, and the like.

The main scanning movement mechanism 493, the supply mechanism 494, the maintenance / recovery mechanism 420, and the transport mechanism 495 are attached to a housing including the side plates 491A and 491B and the back plate 491C.

In this device configured in this way, the paper 410 is fed onto the transport belt 412 and sucked, and the paper 410 is transported in the sub-scanning direction by the orbital movement of the transport belt 412.

Therefore, by driving the liquid discharge head 404 in response to the image signal while moving the carriage 403 in the main scanning direction, the liquid is discharged to the stopped paper 410 to form an image.

As described above, since this device includes the liquid discharge head according to the present invention, it is possible to stably form a high-quality image.

Next, another example of the liquid discharge unit according to the present invention will be described with reference to FIG. FIG. 12 is an explanatory plan view of a main part of the unit.

This liquid discharge unit includes a housing portion composed of side plates 491A, 491B and a back plate 491C, a main scanning movement mechanism 493, a carriage 403, and a liquid among the members constituting the device for discharging the liquid. It is composed of a discharge head 404.

A liquid discharge unit may be configured in which at least one of the above-mentioned maintenance / recovery mechanism 420 and the supply mechanism 494 is further attached to, for example, the side plate 491B of the liquid discharge unit.

Next, still another example of the liquid discharge unit according to the present invention will be described with reference to FIG. FIG. 13 is a front explanatory view of the unit.

This liquid discharge unit includes a liquid discharge head 404 to which the flow path component 444 is attached, and a tube 456 connected to the flow path component 444.

The flow path component 444 is arranged inside the cover 442. A head tank 441 may be included instead of the flow path component 444. Further, a connector 443 that electrically connects to the liquid discharge head 404 is provided on the upper part of the flow path component 444.

In the present application, the liquid to be discharged may have a viscosity and surface tension that can be discharged from the head, and is not particularly limited, but the viscosity becomes 30 mPa · s or less at room temperature, under normal pressure, or by heating or cooling. It is preferable that it is a thing. More specifically, solvents such as water and organic solvents, colorants such as dyes and pigments, polymerizable compounds, resins, functionalizing materials such as surfactants, biocompatible materials such as DNA, amino acids and proteins, and calcium. , Solvents, suspensions, emulsions, etc. containing edible materials such as natural dyes, etc., for example, inks for inkjets, surface treatment liquids, constituents of electronic elements and light emitting elements, and formation of electronic circuit resist patterns. It can be used for applications such as a liquid for use and a material liquid for three-dimensional modeling.

Piezoelectric actuators (laminated piezoelectric elements and thin-film piezoelectric elements), thermal actuators that use electrothermal conversion elements such as heat-generating resistors, and electrostatic actuators that consist of a vibrating plate and counter electrodes are used as energy sources for discharging liquids. Includes what to do.

The "liquid discharge unit" is a liquid discharge head integrated with functional parts and a mechanism, and includes an aggregate of parts related to liquid discharge. For example, the "liquid discharge unit" includes a combination of at least one of a head tank, a carriage, a supply mechanism, a maintenance / recovery mechanism, and a main scanning movement mechanism with a liquid discharge head.

Here, "integration" means, for example, a liquid discharge head and a functional component, a mechanism fixed to each other by fastening, adhesion, engagement, etc., or one in which one is movably held with respect to the other. Including. Further, the liquid discharge head, the functional parts, and the mechanism may be detachably attached to each other.

For example, as a liquid discharge unit, there is one in which a liquid discharge head and a head tank are integrated. In addition, there are cases in which the liquid discharge head and the head tank are integrated by being connected to each other by a tube or the like. Here, a unit including a filter can be added between the head tank of these liquid discharge units and the liquid discharge head.

Further, as a liquid discharge unit, there is a liquid discharge head and a carriage integrated.

Further, as a liquid discharge unit, there is a liquid discharge head in which the liquid discharge head and the scanning movement mechanism are integrated by holding the liquid discharge head movably by a guide member forming a part of the scanning movement mechanism. In some cases, the liquid discharge head, the carriage, and the main scanning movement mechanism are integrated.

Further, as a liquid discharge unit, there is a carriage to which a liquid discharge head is attached, in which a cap member which is a part of the maintenance / recovery mechanism is fixed, and the liquid discharge head, the carriage, and the maintenance / recovery mechanism are integrated. ..

Further, as a liquid discharge unit, there is a liquid discharge unit in which a tube is connected to a head tank or a liquid discharge head to which a flow path component is attached, and the liquid discharge head and a supply mechanism are integrated. Through this tube, the liquid of the liquid storage source is supplied to the liquid discharge head.

The main scanning movement mechanism shall also include a single guide member. Further, the supply mechanism includes a single tube and a single loading unit.

The "device for discharging a liquid" includes a device provided with a liquid discharge head or a liquid discharge unit and driving the liquid discharge head to discharge the liquid. The device for discharging the liquid includes not only a device capable of discharging the liquid to a device to which the liquid can adhere, but also a device for discharging the liquid into the air or the liquid.

The "device for discharging the liquid" may include means for feeding, transporting, and discharging paper to which the liquid can be attached, as well as a pretreatment device, a posttreatment device, and the like.

For example, as a "device that ejects a liquid", an image forming apparatus that ejects ink to form an image on paper, and a three-dimensional object (three-dimensional object) are formed in layers in order to form a three-dimensional object. There is a three-dimensional modeling device (three-dimensional modeling device) that discharges the modeling liquid into the powder layer.

Further, the "device for discharging a liquid" is not limited to a device in which a significant image such as characters and figures is visualized by the discharged liquid. For example, those that form patterns that have no meaning in themselves and those that form a three-dimensional image are also included.

The above-mentioned "material to which a liquid can adhere" means a material to which a liquid can adhere at least temporarily, such as one that adheres and adheres, and one that adheres and permeates. Specific examples include media such as paper, recording paper, recording paper, film, cloth and other recording media, electronic substrates, electronic components such as piezoelectric elements, powder layers (powder layers), organ models, and inspection cells. Yes, including anything to which the liquid adheres, unless otherwise specified.

The material of the above-mentioned "material to which liquid can be attached" may be paper, thread, fiber, cloth, leather, metal, plastic, glass, wood, ceramics or the like as long as the liquid can be attached even temporarily.

Further, the "device for discharging the liquid" includes, but is not limited to, a device in which the liquid discharge head and the device to which the liquid can adhere move relatively. Specific examples include a serial type device that moves the liquid discharge head, a line type device that does not move the liquid discharge head, and the like.

In addition, as a "device for ejecting a liquid", a treatment liquid coating device for ejecting a treatment liquid to the paper in order to apply the treatment liquid to the surface of the paper for the purpose of modifying the surface of the paper, etc. There is an injection granulator that injects a composition liquid in which a raw material is dispersed in a solution through a nozzle to granulate fine particles of the raw material.

In addition, image formation, recording, printing, printing, printing, modeling, etc. in the terms of the present application are all synonymous.

1 Nozzle plate 2 Flow path plate 3 Diaphragm member 4 Piezoelectric element 5 Holding substrate 11 Nozzle 12 Individual liquid chamber 20 Common liquid chamber 101 Head body 102 Frame member 200, 200A to 200D Liquid supply path 201 Liquid supply member 204 Shape variable member 205 Movable member 206 Screw 208 Shape holding means 300, 300A to 300C Liquid supply path 304 Shape variable member 305 Movable member 306 Screw 308 Shape holding means 403 Carriage 404 Liquid discharge head 440 Liquid discharge unit

Claims (8)

A liquid supply path that supplies liquid from the outside to a common liquid chamber that supplies liquid to multiple individual liquid chambers through which multiple nozzles that discharge liquid communicate.
An elastically deformable shape-variable member that forms at least a part of the wall surface of the liquid supply path,
A shape-retaining means for fixing and holding the shape-variable member in an elastically deformed state is provided.
The shape-retaining means includes one that adjusts and fixes the shape-variable member to the liquid supply member side that forms a part of the liquid supply path.
The liquid supply member is provided with the liquid supply path in which a part of the wall surface is formed by the shape-variable member .
The shape-retaining means
A movable member arranged with the shape-variable member sandwiched between the frame member of the head,
A fixing means for moving and fixing the movable member to the frame member side is provided.
A liquid discharge head characterized in that the movable member is provided with the liquid supply path in which a part of the wall surface is formed by the shape-variable member. The shape-retaining means
A movable member arranged with the shape-variable member sandwiched between the liquid supply member forming a part of the liquid supply path, and a movable member.
The liquid discharge head according to claim 1, further comprising a fixing means for moving and fixing the movable member to the liquid supply member side. The liquid discharge head according to claim 2, wherein the fixing means is a screw member tightened to the liquid supply member. The liquid discharge head according to claim 3, wherein the screw member is arranged so as to penetrate the shape-variable member. The liquid discharge head according to claim 3, wherein the screw member is arranged outside the shape-variable member. A liquid discharge unit comprising the liquid discharge head according to any one of claims 1 to 5. A head tank that stores the liquid to be supplied to the liquid discharge head, a carriage on which the liquid discharge head is mounted, a supply mechanism that supplies the liquid to the liquid discharge head, a maintenance / recovery mechanism that maintains and recovers the liquid discharge head, and the liquid. The liquid discharge unit according to claim 6 , wherein at least one of the main scanning moving mechanisms for moving the discharge head in the main scanning direction is integrated with the liquid discharge head. A device for discharging a liquid, which comprises the liquid discharge head according to any one of claims 1 to 5 or the liquid discharge unit according to claim 6 or 7.

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