JP2022087728A - Joint member, liquid discharge head, liquid discharge unit, and device for discharging liquid - Google Patents

Abstract

To avoid a situation in which proper jointing is inhibited because an adhesive protrudes from a recess, even when dimensions of the recess on a joint surface are small.SOLUTION: In a joint member, a joint component 10 is joined to a component 20 to be joined. The component to be joined has a recess 24 provided on a joint surface 20a to which the joint component is to be joined. A base part 26, the height of which is smaller in dimension than the depth of the recess, is provided on a bottom surface of the recess. The adhesion held on the base part makes the joint component joined to the component to be joined.SELECTED DRAWING: Figure 9

Description

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

Conventionally, a joining member in which a joining part is joined to a jointed part is known. For example, Patent Document 1 discloses a liquid discharge head in which a nozzle plate (joining component) having a nozzle is joined to an actuator substrate including a flow path member forming an individual liquid chamber leading to the nozzle. The head has a recess on the joint surface of the actuator substrate to which the nozzle plate is bonded, and an ultraviolet curable adhesive is applied to the bottom surface of the recess so as to protrude from the opening surface of the recess. After that, the nozzle plate is joined to the actuator substrate by aligning the nozzle plate with the joint surface of the actuator substrate and irradiating the adhesive with ultraviolet rays to cure the adhesive.

However, with the miniaturization of the joining member, the size of the recess that can be formed on the joining surface becomes smaller, and there is a problem that the adhesive may protrude from the recess and prevent proper joining.

In order to solve the above-mentioned problems, the present invention is a joining member in which a joined part is joined to a joined part, and the joined part is provided with a recess in a joining surface to which the joined part is joined. A base portion lower than the depth of the recess is provided on the bottom surface of the recess, and the joined part is joined to the joined part by an adhesive held on the base portion.

According to the present invention, even if the size of the recess on the joint surface is small, it is possible to avoid a situation in which the adhesive protrudes from the recess and hinders proper bonding.

The external perspective explanatory view of the liquid discharge head in an embodiment. An exploded perspective explanatory view of the liquid discharge head. A cross-sectional perspective explanatory view of the liquid discharge head. Explosive perspective explanatory view excluding the frame member of the liquid discharge head. The cross-sectional perspective explanatory view of the flow path part of the liquid discharge head. An enlarged cross-sectional perspective explanatory view of the flow path portion of the liquid discharge head. The plan view of the flow path part of the liquid discharge head. The plan view when the liquid discharge head is seen from the nozzle plate side. FIG. 3 is an enlarged plan view of a portion of the joint surface of the individual flow path member to which the nozzle plate is joined, which is surrounded by a broken line indicated by reference numeral B in FIG. FIG. 9 is a cross-sectional view taken along the line AA'in FIG. (A) is a cross-sectional view showing the state of the adhesive on the base portion before joining. (B) is a cross-sectional view showing the state of the adhesive after joining on the base portion. An enlarged plan view of a part of the joint surface of the individual flow path member in the modified example. FIG. 12 is a cross-sectional view taken along the line AA'. FIG. 3 is a plan view showing an example in which a protruding portion for suppressing the outflow of adhesive is provided on the wall portion of the modified example. FIG. 3 is a plan view showing an example in which a gap is provided between the wall portion and the base portion in the modified example. An exploded perspective explanatory view of the head module of the embodiment. An exploded perspective explanatory view seen from the nozzle surface side of the head module of the embodiment. The schematic explanatory view of the printing apparatus in embodiment. A plan explanatory view of an example of a head unit of a printing apparatus. An explanatory plan view of a main part of an example of a printing device. An explanatory side view of a main part of an example of a printing device. An explanatory plan view of a main part of an example of a liquid discharge unit. The front explanatory view of an example of a liquid discharge unit.

Hereinafter, an embodiment in which the present invention is applied to a liquid discharge head provided in a device for discharging a liquid will be described.
FIG. 1 is an external perspective explanatory view of the liquid discharge head according to the present embodiment.
FIG. 2 is an exploded perspective explanatory view of the liquid discharge head.
FIG. 3 is a cross-sectional perspective explanatory view of the liquid discharge head.
FIG. 4 is an exploded perspective explanatory view of the liquid discharge head excluding the frame member.
FIG. 5 is a cross-sectional perspective explanatory view of the flow path portion of the liquid discharge head.
FIG. 6 is an enlarged cross-sectional perspective explanatory view of the flow path portion of the liquid discharge head.
FIG. 7 is a plan explanatory view of the flow path portion of the liquid discharge head.

The liquid discharge head 1 of the present embodiment includes a nozzle plate 10, a flow path plate (individual flow path member) 20, a diaphragm member 30, a common flow path member 50, a damper member 60, a frame member 80, and the like. A board (flexible wiring board) 101 on which the drive circuit 102 is mounted is provided.

The nozzle plate 10 is provided with a plurality of nozzles 11 for discharging a liquid. The plurality of nozzles 11 are arranged in a two-dimensional matrix, and as shown in FIG. 7, they are arranged side by side in three directions of the first direction F, the second direction S, and the third direction T.

The individual flow path member 20 includes a plurality of pressure chambers (individual liquid chambers) 21 communicating with the plurality of nozzles 11, a plurality of individual supply flow paths 22 communicating with the plurality of pressure chambers 21, and a plurality of pressure chambers 21. It forms a plurality of individual collection flow paths 23 that communicate with each other. One pressure chamber 21, an individual supply flow path 22 and an individual recovery flow path 23 leading to the pressure chamber 21 are collectively referred to as an individual flow path 25.

The diaphragm member 30 forms a diaphragm 31 which is a deformable wall surface of the pressure chamber 21, and the diaphragm 31 is integrally provided with a piezoelectric element 40. Further, the diaphragm member 30 is formed with a supply side opening 32 leading to the individual supply flow path 22 and a recovery side opening 33 leading to the individual recovery flow path 23. The piezoelectric element 40 is a pressure generating means that deforms the diaphragm 31 to pressurize the liquid in the pressure chamber 21.

The individual flow path member 20 and the diaphragm member 30 are not limited to being separate members. For example, the individual flow path member 20 and the diaphragm member 30 can be integrally formed of the same member by using an SOI (Silicon On Insulator) substrate. That is, an SOI substrate in which a silicon oxide film, a silicon layer, and a silicon oxide film are formed in this order on a silicon substrate is used, and the silicon substrate is used as an individual flow path member 20, and the silicon oxide film, the silicon layer, and the silicon oxide film are used. The vibrating plate 31 can be formed with. In this configuration, the silicon oxide film of the SOI substrate, the silicon layer, and the layer structure of the silicon oxide film form the diaphragm member 30. As described above, the diaphragm member 30 includes a member made of a material formed on the surface of the individual flow path member 20.

The common flow path member 50 has a plurality of common supply flow path tributaries 52 leading to two or more individual supply flow paths 22 and a plurality of common recovery flow path tributaries 53 leading to two or more individual recovery flow paths 23. It is formed so as to be alternately adjacent to the second direction S of.

The common flow path member 50 has a through hole that serves as a supply port 54 through the supply side opening 32 of the individual supply flow path 22 and the common supply flow path tributary 52, and the recovery side opening 33 and the common recovery flow of the individual recovery flow path 23. A through hole serving as a recovery port 55 through the tributary 53 is formed.

Further, the common flow path member 50 includes one or a plurality of common supply flow path main streams 56 leading to a plurality of common supply flow path tributaries 52, and one or a plurality of common recovery flow path main streams leading to a plurality of common recovery flow path tributaries 53. It forms 57 and.

The damper member 60 includes a supply-side damper 62 facing (opposing) the supply port 54 of the common supply flow path tributary 52 and a collection-side damper 63 facing (opposing) the collection port 55 of the common recovery flow path tributary 53. have.

Here, the common supply flow path tributary 52 and the common recovery flow path tributary 53 have grooves arranged alternately in the common flow path member 50, which is the same member, in the supply side damper 62 or the recovery side damper 63 of the damper member 60. It is configured by sealing with. As the damper material of the damper member 60, it is preferable to use a metal thin film or an inorganic thin film that is resistant to organic solvents. The thickness of the supply-side damper 62 and the recovery-side damper 63 of the damper member 60 is preferably 10 μm or less.

Next, the joining member of the present embodiment will be described.
In the present embodiment, the nozzle plate 10 which is a joining part is joined to the individual flow path member 20 which is a joining part with an adhesive 90 to form a joining member. Here, the surface to be joined to the nozzle plate 10 of the individual flow path member 20 is referred to as a joining surface 20a.

FIG. 8 is a plan view of the liquid discharge head 1 of the present embodiment as viewed from the nozzle plate 10 side. The nozzle 11 is not shown.
FIG. 9 is an enlarged plan view of the joint surface 20a of the individual flow path member 20 to which the nozzle plate 10 is joined, which is surrounded by a broken line indicated by reference numeral B in FIG.
FIG. 10 is a cross-sectional view taken along the line AA'in FIG.
The member indicated by reference numeral 15 is a nozzle cover.

The individual flow path member 20 is provided with recesses 24 that open on the joint surface 20a side near the four corners of the joint surface 20a with the nozzle plate 10. The recess 24 of the present embodiment is provided on the outer peripheral edge portion of the joint surface 20a, and the recessed side portion on the outer peripheral edge portion side thereof is also opened on the side surface 20b of the individual flow path member 20.

When joining the individual flow path member 20 and the nozzle plate 10, in the present embodiment, the adhesive 91 for temporary joining is applied to the recesses 24 at the four corners of the joining surface 20a, and the individual flow path member 20 is joined. Another adhesive 90 for main joining is applied to a predetermined portion on the surface 20a. As the adhesive 91 for temporary bonding, for example, a photocurable adhesive, particularly an ultraviolet curable adhesive, can be preferably used.

When an ultraviolet curable adhesive is used as the temporary bonding adhesive 91 applied in the recess 24, the nozzle plate 10 is positioned on the joint surface 20a of the individual flow path member 20, and then the inside of the recess 24 is formed. It is necessary to irradiate the ultraviolet curable adhesive with ultraviolet rays. In the present embodiment, since the concave side portion is opened on the side surface 20b of the individual flow path member 20, even after the nozzle plate 10 is positioned on the joint surface 20a of the individual flow path member 20, the individual flow path member 20 Ultraviolet rays can be easily applied to the ultraviolet curable adhesive in the recess 24 from the side surface 20b.

Further, as the adhesive 90 for this joining, any adhesive can be used from the viewpoint of required mechanical strength, liquid contact property, elastic modulus, and adhesion to parts. For example, an epoxy-based resin adhesive, a urethane-based resin adhesive, an elastomer-based resin adhesive, and the like can be mentioned. In particular, the adhesive 90 for this bonding is preferably a thermosetting adhesive. Examples of the method for applying the adhesive 90 include a thin film printing method, a spray coating method, and a dispensing method.

After the nozzle plate 10 is temporarily bonded to the individual flow path member 20 with the adhesive 91 for temporary bonding, heat treatment is performed in order to cure the adhesive 90 for main bonding, which is a thermosetting adhesive. Since it is necessary to prevent the positioned nozzle plate 10 from moving with respect to the joint surface 20a of the individual flow path member 20 during this heat treatment, in the present embodiment, the adhesive 91 for temporary joining is used in advance. Temporarily joined.

For temporary joining, the adhesive 91 supplied into the recess 24 is held in the recess 24 so as to protrude from the opening surface of the recess 24 (so as to protrude above the joint surface 20a). There is a need. That is, it is necessary to supply a sufficient amount of the adhesive 91 into the recess 24 so that the adhesive 91 can be held in a state of protruding from the opening surface of the recess 24.

Here, as the size of the liquid discharge head 1 progresses, the area where the recess 24 can be formed on the joint surface 20a of the individual flow path member 20 is also narrowed, so that the dimension of the recess 24 (normal of the joint surface 20a) The opening area of the recess 24 when viewed from the direction) must be reduced. As a result, when an attempt is made to supply a sufficient amount of the adhesive 91 into the recess 24 so that the adhesive 91 can be held in a state of protruding from the opening surface of the recess 24, the drops of the adhesive 91 are formed in the recess 24. It becomes larger than the opening, and the adhesive 91 protrudes from the recess 24.

When the adhesive 91 is properly supplied onto the bottom surface in the recess 24, due to the influence of wettability, the adhesive 91 maintains a round and bulging shape due to its own surface tension, and is pushed out from the opening surface of the recess 24. Can have a height of. However, if the adhesive 91 protrudes from the recess 24, the surface tension of the adhesive 91 collapses, flows through the recess 24, and the adhesive 91 flows out from the side surface 20b of the individual flow path member 20, resulting in temporary joining. Can't be done properly. Further, if the adhesive 91 protrudes from the recess 24, the adhesive 91 may be mixed with the adhesive 90 for main bonding, which may reduce the adhesiveness of the adhesive 90 for main bonding and reduce the bonding strength. There is also.

Further, even if the droplet of the adhesive 91 is smaller than the opening of the recess 24, if there is not a sufficient margin in the distance between the inner wall surface of the recess 24 and the adhesive 91, an error in the supply amount of the adhesive 91 or an error in the supply position For example, the adhesive 91 may come into contact with the inner wall surface of the recess 24. In this case, the surface tension of the adhesive 91 collapses, the adhesive 91 flows through the recess 24 and flows out from the side surface 20b of the individual flow path member 20, and temporary joining cannot be performed properly.

Therefore, in the present embodiment, as shown in FIGS. 9 and 10, a base portion 26 having a height h2 lower than the depth h1 of the recess 24 is provided on the bottom surface of the recess 24, and the base portion 26 is provided. The adhesive 91 is supplied to and held on the upper surface. As a method for forming such a pedestal portion 26, for example, when the step of forming the recess 24 in the individual flow path member 20 is performed by etching, a method of etching so that the pedestal portion 26 remains on the bottom surface of the pedestal portion 26 is used. Can be mentioned. Further, for example, a method of forming the recess 24 in the individual flow path member 20 and then retrofitting the base portion 26 on the bottom surface of the recess 24 can be mentioned. The method of forming the base portion 26 is not limited to these methods.

In the conventional configuration in which the adhesive 91 is supplied and held on the bottom surface of the recess 24 having no base portion 26, an amount of the adhesive 91 that can make the height of the adhesive 91 higher than the depth h1 of the recess 24 is required. there were. On the other hand, in the present embodiment, the height h2 of the base portion 26 is raised, and the height required for the adhesive 91 can be lowered by the height of h1-h2. As a result, as shown in FIG. 11A, the adhesive 91 can be held so as to protrude from the opening surface of the recess 24 with a smaller amount of the adhesive 91 than in the conventional configuration. For example, when the height h2 of the base portion 26 is 1/2 of the depth h1 of the recess (h2 = h1 / 2), the amount (volume) of the required adhesive 91 is approximately 1/8 of the conventional configuration. Can be.

By reducing the amount of the adhesive 91 required in this way, it is possible to avoid a situation in which the adhesive 91 protrudes from the recess 24 or the adhesive 91 flows out from the recess 24. As shown, proper temporary bonding is achieved. Further, the situation where the adhesive 91 is mixed with the adhesive 90 for the main bonding is avoided, and the situation where the adhesiveness of the adhesive 90 for the main bonding is lowered and the bonding strength is lowered is also avoided.

It is possible to make the recess 24 protrude from the opening surface of the recess 24 with a small amount of the adhesive 91 by forming the recess 24 shallowly without providing the base 26 in the recess 24. be. However, the recess 24 of the individual flow path member 20 is formed in the same process as other processing points such as the pressure chamber (individual liquid chamber) 21 and the individual flow path 25 provided in the individual flow path member 20. There are restrictions on changing the depth of the recess 24. Therefore, it is desired that the adhesive 91 protrudes from the opening surface of the recess 24 with a small amount of the adhesive 91 without changing the depth of the recess 24.

[Modification example]
Next, a modification of the liquid discharge head 1 of the above-described embodiment will be described.
FIG. 12 is an enlarged plan view of a part of the joint surface 20a of the individual flow path member 20 in this modification.
FIG. 13 is a cross-sectional view taken along the line AA'in FIG.

In this modification, a wall portion 27 is provided on the bottom surface of the recess 24 in the above-described embodiment so as to surround the periphery of the base portion 26. The wall portion 27 has a height equal to or less than the depth h1 of the recess 24, and in this modification, it has the same height as the depth h1 of the recess 24. The wall portion 27 having the same height as the depth h1 of the recess 24 has an advantage of facilitating the manufacturing process.

In this modification, as shown in FIG. 11, the wall portion 27 lacks a portion facing the open concave portion side portion side (side surface 20b side of the individual flow path member 20), and has other locations in three directions. Then, the wall portion 27 is interposed between the base portion 26 and the inner wall surface of the recess 24. As a result, even when an excessive amount of the adhesive 91 is supplied to the base portion 26, the adhesive 91 is blocked by the wall portion 27 and extends beyond the inner wall surface of the recess 24 to the joint surface of the individual flow path member 20. It is possible to suppress the outflow to 20a. Therefore, the situation where the adhesive 91 is mixed with the adhesive 90 for main bonding on the joint surface 20a can be more stably avoided, and the adhesiveness of the adhesive 90 for main bonding is lowered to reduce the bonding strength. It can be suppressed stably.

Further, the wall portion 27 of this modification is provided so that a gap is interposed between the wall portion 27 and the inner wall surface of the recess 24. As a result, even if the adhesive 91 flows out beyond the wall portion 27, the outflowing adhesive 91 is held in the gap between the wall portion 27 and the inner wall surface of the recess 24, and the inner wall surface of the recess 24 is held. It is suppressed that it flows out to the joint surface 20a beyond the above.

Since the wall portion 27 of this modification is open because the portion facing the open concave portion side portion side (side surface 20b side of the individual flow path member 20) is missing, the adhesive on the base portion 26 is used. The wall portion 27 does not interfere with the irradiation of the 91 (ultraviolet curable adhesive) with ultraviolet rays.

Further, when the portion of the wall portion 27 is chipped and opened in this way and the adhesive 91 flows out from the base portion 26, the adhesive 91 is chipped of the wall portion 27. It flows out from the present location and flows to the side surface 20b side of the individual flow path member 20. As a result, it is possible to more stably avoid the situation where the outflowing adhesive 91 is mixed with the adhesive 90 for main bonding on the bonding surface 20a, and the adhesiveness of the adhesive 90 for main bonding is lowered to improve the bonding strength. It is possible to stably suppress the situation of dropping.

In this modification, as shown in FIG. 14, an outflow suppressing portion for suppressing the outflow of the adhesive 91 may be provided at the missing portion of the wall portion 27. In the example of FIG. 13, a protruding portion 27a as an outflow suppressing portion is provided so as to close a part of the missing portion of the wall portion 27. According to this, when the adhesive 91 flows out from the base portion 26, the adhesive 91 is less likely to flow out from the chipped portion of the wall portion 27, and the side surface 20b side of the individual flow path member 20 side. The amount of the adhesive 91 flowing out of the adhesive 91 can be suppressed. As a result, it is possible to suppress the adverse effect of the adhesive 91 flowing out from the side surface 20b side of the individual flow path member 20 (such as inhibiting the joining of the nozzle cover 15).

Further, as shown in FIG. 15, a gap may be provided between the wall portion 27 and the base portion 26. According to this, even if the adhesive 91 flows out from the base 26, the outflowing adhesive 91 is held in the gap between the base 26 and the wall 27 and flows out beyond the wall 27. Is suppressed.

Next, an example of the head module including the liquid discharge head 1 of the present embodiment will be described with reference to FIGS. 16 and 17.
FIG. 16 is an exploded perspective explanatory view of the head module of the present embodiment.
FIG. 17 is an exploded perspective explanatory view of the head module of the present embodiment as viewed from the nozzle surface side.

The head module 100 includes a liquid discharge head (hereinafter, also simply referred to as “head”) 1 for discharging liquid, a base member 103 for holding a plurality of heads 1, and a cover member serving as a nozzle cover 15 for the plurality of heads 1. It is equipped with 113. Further, the head module 100 includes a heat dissipation member 104, a manifold 105 forming a flow path for supplying liquid to a plurality of heads 1, a printed circuit board (PCB) 106 connected to the flexible wiring member 101, and a module. It is equipped with a case 107.

Next, an example of the device for discharging the liquid according to the present invention will be described with reference to FIGS. 18 and 19.
FIG. 18 is a schematic explanatory view of a printing device which is an inkjet recording device as a device for discharging a liquid in the present embodiment.
FIG. 19 is a plan explanatory view of an example of the head unit of the printing apparatus of the present embodiment.

The printing device 500, which is a device for discharging this liquid, includes a carry-in means 501 for carrying in the continuous body 510, a guide transport means 503 for guiding and transporting the continuous body 510 carried in from the carry-in means 501 to the printing means 505, and a continuous body. It is provided with a printing means 505 that discharges a liquid to 510 to form an image, a drying means 507 that dries the continuum 510, and a unloading means 509 that carries out the continuum 510.

The continuum 510 is sent out from the original winding roller 511 of the carrying-in means 501, guided and conveyed by the rollers of the carrying-in means 501, the guiding and transporting means 503, the drying means 507, and the carrying-out means 509, and is guided and conveyed by the winding roller 591 of the carrying-out means 509. It is wound up at. The continuum 510 is conveyed by the printing means 505 on the transfer guide member 559 facing the head unit 550, and an image is printed by the liquid discharged from the head unit 550.

In the printing apparatus 500 of the present embodiment, the head unit 550 is provided with the two head modules 100A and 100B according to the above-described embodiment in the common base member 552.

Then, when the arrangement direction of the heads 1 in the direction orthogonal to the transport direction of the head modules 100A and 100B is set as the head arrangement direction, the liquids of the same color are discharged in the head rows 1A1 and 1A2 of the head modules 100A. Similarly, the head rows 1B1 and 1B2 of the head module 100A are set as a set, the head rows 1C1 and 1C2 of the head module 100B are set as a set, and the head rows 1D1 and 1D2 are set as a set to discharge the liquid of the required color.

Next, another example of the printing device as a device for discharging the liquid according to the present invention will be described with reference to FIGS. 20 and 21.
FIG. 20 is an explanatory plan view of a main part of the printing apparatus of this example.
FIG. 21 is an explanatory side view of a main part of the printing apparatus of this example.

The printing device 500 of this example 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 head 1 and the head tank 441, which are the droplet discharge heads according to the present invention, are integrated. The head 1 of the liquid discharge unit 440 discharges, for example, liquids of each color of yellow (Y), cyan (C), magenta (M), and black (K). Further, the liquid discharge head 1 has a nozzle row composed of a plurality of nozzles arranged in a sub-scanning direction orthogonal to the main scanning direction, and is mounted with the discharge direction facing downward. The liquid discharge head 1 is connected to a liquid circulation device, and a liquid of a required color is circulated and supplied.

The printing device 500 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 head 1. 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 1 is arranged on the side of the transport belt 412. The maintenance / recovery mechanism 420 is composed of, for example, a cap member 421 that caps the nozzle surface of the head 1, a wiper member 422 that wipes the nozzle surface, and the like. Further, the main scanning movement mechanism 493, 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 the printing apparatus 500 configured in this way, the paper 410 is fed onto the transport belt 412 and sucked, and the paper 410 is conveyed in the sub-scanning direction by the circumferential movement of the conveyor belt 412. Therefore, by driving the head 1 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.

Next, another example of the liquid discharge unit according to the present invention will be described with reference to FIG. 22.
FIG. 22 is an explanatory plan view of a main part of the liquid discharge unit of this example.

The liquid discharge unit 440 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 member constituting the device for discharging the liquid. It is composed of a head 1.

It is also possible to form a liquid discharge unit in which the above-mentioned maintenance / recovery mechanism 420 is further attached to, for example, the side plate 491B of the liquid discharge unit 440.

Next, still another example of the liquid discharge unit according to the present invention will be described with reference to FIG. 23.
FIG. 23 is a front explanatory view of the liquid discharge unit of this example.

The liquid discharge unit 440 includes a head 1 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 1 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 pigments, such as inks for inkjets, surface treatment liquids, components of electronic and light emitting elements, and formation of electronic circuit resist patterns. It can be used in applications such as liquids and material liquids for three-dimensional modeling.

Piezoelectric actuators (laminated piezoelectric elements and thin-film piezoelectric elements), thermal actuators that use electric heat 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 liquid. Includes what to do.

The "liquid discharge unit" is a liquid discharge head integrated with functional parts and a mechanism, and includes a collection of parts related to liquid discharge. For example, the "liquid discharge unit" includes a head tank, a carriage, a supply mechanism, a maintenance / recovery mechanism, a main scanning movement mechanism, a liquid circulation device in which at least one of the configurations is combined with a liquid discharge head, and the like.

Here, the term "integration" means, for example, a liquid discharge head and a functional component, a mechanism in which the mechanism is fixed to each other by fastening, bonding, engagement, etc., or one in which one is movably held with respect to the other. include. Further, the liquid discharge head, the functional component, and the mechanism may be configured to be detachable from each other.

For example, as a liquid discharge unit, there is a unit in which a liquid discharge head and a head tank are integrated. In some cases, 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 unit in which a liquid discharge head and a carriage are integrated.

Further, there is a liquid discharge unit in which the liquid discharge head and the scanning movement mechanism are integrated by holding the liquid discharge head movably by a guide member constituting 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. The liquid of the liquid storage source is supplied to the liquid discharge head through this tube.

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

Although the "liquid discharge unit" is described here in combination with the liquid discharge head, the "liquid discharge unit" includes the above-mentioned head module or head unit including the liquid discharge head and the functions as described above. It also includes integrated parts and mechanisms.

The "device for discharging a liquid" includes a device including a liquid discharge head, a liquid discharge unit, a head module, a head unit, and the like, 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 into the liquid.

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

For example, as a "device that ejects a liquid", an image forming device that is a device that ejects ink to form an image on paper, and a three-dimensional model (three-dimensional model) are formed in layers in order to form a three-dimensional model. 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 "thing to which a liquid can adhere" means a material to which a liquid can adhere at least temporarily, such as a material to which the liquid adheres and adheres, and a material to which the liquid adheres and permeates. Specific examples include paper, recording paper, recording paper, film, recorded media such as cloth, electronic substrates, electronic components such as piezoelectric elements, powder layers (powder layers), organ models, and media such as inspection cells. Yes, and includes everything to which the liquid adheres, unless otherwise specified.

The material of the above-mentioned "material to which a liquid can adhere" may be paper, thread, fiber, cloth, leather, metal, plastic, glass, wood, ceramics or the like as long as the liquid can adhere 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 granulates fine particles of the raw material by injecting a composition liquid in which the raw material is dispersed in the solution through a nozzle.

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

What has been described above is an example, and has a unique effect in each of the following aspects.
[First aspect]
The first aspect is a joining member (for example, a liquid discharge head 1) in which a joining part (for example, a nozzle plate 10) is joined to a joining part (for example, an individual flow path member 20), and the joining part is the joining. A concave portion 24 is provided on the joint surface (for example, the joint surface 20a) to which the parts are joined, and a base portion 26 having a depth lower than the depth h1 of the concave portion is provided on the bottom surface of the concave portion, and the adhesive is held on the base portion. It is characterized in that the joined part is joined to the joined part by the agent 91.
In this embodiment, in order to hold the adhesive on the base portion provided on the bottom surface of the recess, the adhesive amount is smaller than that in the conventional configuration in which the adhesive is held on the bottom surface of the recess without the base portion from the recess opening surface. Adhesive can be applied so that it sticks out. As a result, it is not necessary to require an amount of adhesive so that the occupied area of the adhesive when viewed from the normal direction of the joint surface exceeds the opening surface of the recess, so that the adhesive protrudes from the recess and hinders proper bonding. Can be avoided.

[Second aspect]
In the second aspect, in the first aspect, the jointed part is bonded not only by the adhesive 91 held on the base portion but also by another adhesive 90 attached around the recess on the joint surface. It is characterized by being joined to a part.
When the part to be joined is joined by another adhesive attached around the recess on the joint surface, if the adhesive in the recess protrudes from the recess, the adhesive is mixed with the other adhesive. It may end up. When such mixing occurs, the adhesiveness of the other adhesive is lowered, and the bonding strength of the other adhesive may be lowered.
According to this aspect, as described above, the structure in which the adhesive is held by the base portion provided on the bottom surface of the recess prevents the adhesive from sticking out from the recess. Therefore, it is possible to avoid a situation in which the adhesiveness of the other adhesive is lowered, and it is possible to avoid a situation in which the bonding strength of the other adhesive is lowered and proper bonding is hindered.

[Third aspect]
In the third aspect, in the second aspect, the adhesive held on the pedestal is a photocurable adhesive, and the other adhesive held on the joint surface is a thermosetting adhesive. It is characterized by being an agent.
According to this, after temporary bonding with a photocurable adhesive, main bonding can be performed with a thermosetting adhesive.

[Fourth aspect]
A fourth aspect is characterized in that, in any one of the first to third aspects, the pedestal portion has a height of ½ or more of the depth of the recess.
According to this, the amount of the adhesive required to apply the adhesive so as to protrude from the opening surface of the recess can be sufficiently small, and the adhesive protrudes from the recess to prevent proper bonding. Can be stably avoided.

[Fifth aspect]
In the fifth aspect, in any one of the first to fourth aspects, the recess is provided on the outer peripheral edge portion of the joint surface, and the recess side portion on the outer peripheral edge portion side opens to the side surface of the jointed part. It is characterized by being.
According to this, even if the adhesive in the recesses flows out, it is possible to prevent the adhesive from flowing to the outer peripheral edge of the joint surface and flowing onto the joint surface, which hinders proper bonding. It is possible to avoid it more stably. Further, since the concave side portion is opened to the side surface of the part to be joined in this way, when a photocurable adhesive is used as the adhesive to be attached to the base portion, light is applied to the adhesive. Irradiation is facilitated, and the manufacturing process can be facilitated.

[Sixth aspect]
In the sixth aspect, in the fifth aspect, a wall portion 27 having a height equal to or lower than the depth of the recess is provided on the bottom surface of the recess so as to surround the periphery of the base, and the wall portion is formed. It is characterized in that a portion facing the side portion of the recess that is open is missing.
According to this, even if the adhesive adhered to the pedestal portion flows out from the pedestal portion, the adhesive is blocked by the wall portion and prevented from flowing out from the recess. Therefore, it is possible to more stably avoid a situation in which the adhesive protrudes from the recess and hinders proper bonding. In addition, the lack of the wall portion makes it easier to irradiate the adhesive with light when a photocurable adhesive is used as the adhesive to be attached to the base, which facilitates the manufacturing process. It can be facilitated.

[7th aspect]
A seventh aspect is characterized in that, in the sixth aspect, the wall portion has an outflow suppressing portion (for example, a protruding portion 27a) for suppressing the outflow of the adhesive at the missing portion.
According to this, even if a situation occurs in which the adhesive flows out from the chipped portion provided on the wall portion, the outflow suppressing portion suppresses the outflow of the adhesive, so that the adhesive flows out from the recess. It is possible to more stably avoid the situation where it sticks out and hinders proper bonding.

[8th aspect]
The eighth aspect is characterized in that, in the sixth or seventh aspect, there is a gap between the wall portion and the pedestal portion.
According to this, even if the adhesive attached on the pedestal part flows out from the pedestal part, the adhesive is held in the gap between the pedestal part and the wall part, and it is difficult for the adhesive to flow out from the recess. Can be done. Therefore, it is possible to more stably avoid a situation in which the adhesive protrudes from the recess and hinders proper bonding.

[9th aspect]
A ninth aspect is a liquid discharge head, characterized in that it includes a joining member according to any one of the first to eighth aspects.
According to this aspect, it is possible to provide a liquid discharge head provided with an appropriately joined joining member.

[10th aspect]
In the tenth aspect, in the liquid discharge head of the ninth aspect, one of the joined parts and the joined parts is a nozzle plate 10 having a nozzle for discharging the liquid, and the other is an individual liquid leading to the nozzle. It is characterized in that it is a flow path member (for example, an individual flow path member 20) that forms a chamber.
According to this, it is possible to provide a liquid discharge head in which a nozzle plate and a flow path member are appropriately joined.

[11th aspect]
The eleventh aspect is a liquid discharge unit, which comprises the liquid discharge head of the ninth or tenth aspect.
According to this aspect, it is possible to provide a liquid discharge unit having an appropriately joined joining member.

[12th aspect]
A twelfth aspect is a device for discharging a liquid, which includes a joining member according to any one of the first to eighth aspects, a liquid discharge head according to the ninth or tenth aspect, or a liquid discharge unit according to the eleventh aspect. It is characterized by.
According to this aspect, it is possible to provide a device for discharging a liquid having an appropriately joined joining member.

1: Liquid discharge head 10: Nozzle plate 11: Nozzle 15: Nozzle cover 20: Individual flow path member 20a: Joint surface 20b: Side surface 21: Pressure chamber 22: Individual supply flow path 23: Individual recovery flow path 24: Recessed 25: Individual flow path 26: Base 27: Wall 27a: Protrusion 30: Vibration plate member 31: Vibration plate 32: Supply side opening 33: Recovery side opening 40: Piezoelectric element 50: Common flow path member 52: Common supply flow path Tributary flow 53: Common recovery flow path tributary 54: Supply port 55: Recovery port 56: Common supply flow path main flow 57: Common recovery flow path main flow 60: Damper member 62: Supply side damper 63: Recovery side damper 80: Frame member 90: Adhesive 91: Adhesive 100: Head module 440: Liquid ejection unit 500: Printing device

Japanese Unexamined Patent Publication No. 2017-74731

Claims (12)

A joint member in which the joint part is joined to the jointed part,
The jointed part has a recess on the joint surface to which the joined part is joined.
A base portion lower than the depth of the recess is provided on the bottom surface of the recess.
A joining member, characterized in that the joined part is joined to the joined part by an adhesive held on the base portion. In the joining member according to claim 1,
The joint is characterized in that it is joined to the part to be joined by not only the adhesive held on the base portion but also another adhesive attached around the recess on the joint surface. Element. In the joining member according to claim 2,
The adhesive held on the pedestal is a photocurable adhesive and is a photocurable adhesive.
The other adhesive held on the joint surface is a bonding member, characterized in that it is a thermosetting adhesive. In the joining member according to any one of claims 1 to 3.
The base portion is a joining member having a height of ½ or more of the depth of the recess. In the joining member according to any one of claims 1 to 4.
The concave portion is provided on the outer peripheral edge portion of the joint surface, and the concave portion side portion on the outer peripheral edge portion side is open to the side surface of the jointed part. In the joining member according to claim 5,
On the bottom surface of the recess, a wall portion having a height equal to or lower than the depth of the recess is provided so as to surround the periphery of the base.
The wall portion is a joining member, characterized in that a portion facing the open concave portion side portion is missing. In the joining member according to claim 6,
The wall portion is a joining member, characterized in that the missing portion has an outflow suppressing portion for suppressing the outflow of the adhesive. In the joining member according to claim 6 or 7.
A joining member having a gap between the wall portion and the base portion. A liquid discharge head comprising the joining member according to any one of claims 1 to 8. In the liquid discharge head according to claim 9,
One of the joined parts and the joined parts is a nozzle plate having a nozzle for discharging the liquid, and the other is a flow path member forming an individual liquid chamber leading to the nozzle. Discharge head. A liquid discharge unit comprising the liquid discharge head according to claim 9 or 10. Discharge a liquid comprising the joining member according to any one of claims 1 to 8, the liquid discharge head according to claim 9 or 10, or the liquid discharge unit according to claim 11. Device.

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