JP2011245657A - Liquid ejection head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid ejection head for easily and accurately adjusting a position of an ejection port surface in a direction vertical to the ejection port surface for ejecting a liquid by improving a problem of displacement of a liquid ejection head due to bonded anchorage.SOLUTION: The liquid ejection head 100 has a plurality of screws 1430 which are disposed at both ends of the liquid ejection head 100 in an arrangement direction with which a plurality of recording elements 1102 are arranged, and in which when the head 100 is mounted to a liquid ejection device 3000, the end part contacts with the liquid ejection device 3000 in the direction vertical to the ejection port surface 1106 of the recording element substrate 1100. By rotating the plurality of screws 1430, the position of ejection port surface 1106 is adjustable in the vertical direction.

Description

  The present invention relates to a liquid discharge head and a liquid discharge apparatus that discharge liquid.

  When a typical ink jet recording head (hereinafter also referred to as “recording head”) as a liquid ejecting head for ejecting liquid is attached to an ink jet recording apparatus (hereinafter also referred to as “recording apparatus”), Positioning accuracy is required. For this reason, the recording head has a conveyance direction (X direction) for conveying a recording medium such as paper, a direction along the surface of the recording medium and perpendicular to the conveyance direction (Y direction), and perpendicular to the surface of the recording medium. A positioning unit that performs positioning with respect to the recording apparatus is provided with respect to a specific direction (Z direction). In the conventional recording head, the ink ejection member and the positioning member are aligned with the recording apparatus so that the position of the ejection port for ejecting ink to each positioning unit is within a predetermined accuracy. The method of fixing with an adhesive was taken. In addition, as described in Patent Document 1, there is a configuration in which the recording head main body is not provided with a positioning portion, and an intermediate holding member is provided between the recording head and the head holder to perform recording head positioning. In this case, after the plurality of recording heads are positioned at predetermined positions with respect to the head holder, the intermediate holding member, the recording head, and the head holder are fixed using an adhesive or the like.

  In either case, it is necessary to adjust the mounting position of the recording head by image processing or the like, and to cure and fix the adhesive while maintaining this position.

JP-A-10-309801

  As described in the background art, when the recording head is accurately positioned and fixed to the recording apparatus using an adhesive, the adhesive shrinks due to curing, or heat when a thermosetting adhesive is used. There is a risk of displacement after positioning due to the contraction of the accompanying member. In particular, it is difficult to position and fix a complicated-shaped member, a large member, or a member having a relatively large weight in a short time with high accuracy.

  In addition, when the recording head is accurately positioned and fixed to the recording apparatus using an adhesive, the recording head is fixed to the recording apparatus with an adhesive because the adhesive is likely to be deformed or peeled off when subjected to an external force. Even after positioning, there is a risk of displacement.

  In particular, in the case of a full-line type recording head, since the recording head is elongated and large, it is necessary to fix the recording head with high force in order to accurately position the recording head and fix it so as not to move. For this reason, the position change due to the deformation of the adhesive or the peeling of the adhesive is more likely to occur, and the possibility that the recording head is displaced is increased. Further, when the recording head becomes longer and longer, the problem of positional accuracy may be further increased due to linear expansion of the member accompanying the temperature change.

  Accordingly, the present invention improves the problem of positional deviation of the liquid discharge head due to adhesive fixation, and allows the liquid discharge head to easily and accurately adjust the position of the discharge port surface in the direction perpendicular to the discharge port surface that discharges the liquid. The purpose is to provide.

  The liquid discharge head of the present invention is a liquid discharge head for discharging a liquid, and includes a discharge port surface on which a discharge port for discharging a liquid is formed and a plurality of energy generating energy for discharging the liquid from the discharge port. A liquid ejection member having a recording element substrate including a recording element; and a liquid ejection device provided at both ends of the liquid ejection member with respect to an arrangement direction in which the plurality of recording elements are disposed. A plurality of screws whose tips are in contact with the liquid ejection device with respect to a direction perpendicular to the ejection port surface, and by rotating the plurality of screws, the vertical direction The position of the discharge port surface can be adjusted.

  Since the position of the tip of the screw that determines the position of the discharge port surface in the direction perpendicular to the discharge port surface of the recording element substrate can be adjusted by rotating the screw, the position of the discharge port surface can be adjusted easily and accurately. be able to. Also, the position of the tip of the screw is determined without any adhesive, and when the liquid discharge head is mounted on the liquid discharge device, the screw, which is a positioning member, receives direct force, so positioning by adhesive fixing It is possible to suppress the occurrence of misalignment that may occur in this case.

2A and 2B are diagrams for explaining a recording head to which the present invention can be applied, in which FIG. 1A is an external perspective view of the recording head, FIG. 2B is a bottom view of the recording head, and FIG. is there. FIG. 3 is an exploded perspective view of a recording element unit. 4A and 4B are diagrams for explaining a recording element substrate, in which FIG. 3A is an external perspective view of the recording element substrate, and FIG. 3B is a cross-sectional view taken along line AA in FIG. 2A and 2B are views for explaining a base plate, in which FIG. 1A is an external perspective view including a surface (mounting surface) on which a recording element substrate is arranged, and FIG. FIG. 4C is a plan view showing the inner ink flow path as viewed from the surface on which the recording element substrate is disposed. It is an external appearance perspective view of an electrical wiring board. It is an external perspective view showing support members A and B. It is an external appearance perspective view which shows an ink supply member. It is a disassembled perspective view which shows a drive circuit board unit. FIG. 4 is a perspective view showing a state where a recording element unit and a drive circuit board unit are coupled. It is a figure for demonstrating the structure of a recording device. 11A and 11B are diagrams illustrating a recording apparatus in which a recording head to which the present invention can be applied is mounted, in which FIG. 11A is a plan view viewed from the X direction in FIG. 9, and FIG. It is a top view containing a cross section. It is a disassembled perspective view for demonstrating the structure of support member A and B. FIG.

  A typical ink jet recording head will be described as an example of a liquid discharge head to which the present invention is applicable. FIGS. 1 to 11 are diagrams for explaining the configuration of a recording head and an ink jet recording apparatus (hereinafter referred to as “recording apparatus”) to which the recording head is mounted.

(1) Recording Head FIG. 1 shows the configuration of a recording head 100 to which the present invention can be applied. In the recording head 100, a recording element substrate 1100 having ejection openings is arranged over a range corresponding to the maximum width of a recording sheet such as paper that is supposed to be used, so that the recording head 100 is not scanned and high-speed recording is performed. This is a possible full line type recording head 100.

  As shown in FIG. 1C, the recording head 100 includes a recording element unit 1000 and a drive circuit board unit 2000. The recording element unit 1000 and the drive circuit board unit 2000 are mechanically and electrically detachable from each other. Combined with

(Recording element unit)
An exploded perspective view of the recording element unit 1000 is shown in FIG. The recording element unit 1000 includes a plurality of recording element substrates 1100, a base plate 1200, two support members 1400 and 1405, two ink supply members 1500, an electric wiring substrate 1300, and two side plates 1600 and 1650.

  The plurality of recording element substrates 1100 are arranged and mounted on the mounting surface 1200A of the base plate 1200 with high precision in a zigzag manner in the longitudinal direction of the base plate 1200. That is, in the present embodiment, the longitudinal direction of the base plate 1200 and the arrangement direction of the plurality of recording element substrates 1100 coincide. The base plate 1200 on which the recording element substrate 1100 is mounted functions as a liquid ejection member. The two support members 1400 and 1405 and the two ink supply members 1500 are fixed to both ends of the base plate 1200 in the longitudinal direction. The electric wiring board 1300 is bonded and fixed to the base plate 1200, and both ends of the electric wiring board 1300 in the short direction are bent.

  Next, the configuration of the recording element unit 1000 will be described in more detail.

  First, the configuration of the recording element substrate 1100 is shown in FIGS. The recording element substrate 1100 includes a silicon substrate 1108 and an ejection port plate 1110.

  The thickness of the silicon substrate 1108 is, for example, about 0.5 to 1 mm. In the silicon substrate 1108, a long groove-like ink supply port 1101 extending in the longitudinal direction of the silicon substrate 1108 is formed. In addition, on both sides of the ink supply port 1101, electrothermal conversion elements 1102 such as heaters as recording elements that generate energy for ejecting ink are arranged in a staggered pattern, one by one. The electrothermal transducer 1102 and the electrical wiring (not shown) such as aluminum that is electrically connected to the electrothermal transducer 1102 are formed by a film forming technique. Further, electrodes 1103 that are electrically connected to the electrical wiring substrate 1300 are provided at both ends in the longitudinal direction of the recording element substrate 1100.

  A discharge port plate 1110 made of a resin material is provided on the silicon substrate 1108. An ink flow path 1104 and a discharge port 1105 corresponding to the electrothermal conversion element 1102 are provided on the discharge port plate 1110 by a photolithography technique. Is formed. The discharge port 1105 is provided so as to face the electrothermal conversion element 1102. That is, the ejection port 1105 is disposed along the longitudinal direction of the recording element substrate 1100. Air bubbles are generated by driving the electrothermal conversion element 1102, and the ink supplied from the ink supply port 1101 is discharged from the discharge port 1105.

Next, the structure of the base plate 1200 is shown in FIGS. The base plate 1200 is formed by laminating and firing a plurality of alumina green sheets formed of aluminum oxide (Al ₂ O ₃ ; hereinafter referred to as alumina). The thickness of the alumina green sheet is, for example, about 0.5 to 1 mm, and the thickness of the base plate 1200 on which these are laminated is about 10 mm. In the base plate 1200, an ink supply slit 1210 for supplying ink to the ink supply port 1101 of the recording element substrate 1100 and an ink flow path 1220 for supplying ink from an ink tank (not shown) to the ink supply slit 1210 are formed. .

In this embodiment, alumina is used as the material of the base plate 1200, but the material is not limited to this. The material of the base plate 1200 has a linear expansion coefficient similar to that of the material of the member in contact with the base plate 1200 of the recording element substrate 1100, and is equal to or higher than the thermal conductivity of the material. Any material having thermal conductivity may be used. Examples of the material of the base plate 1200 include silicon (Si), aluminum nitride (AlN), zirconia (ZrO ₂ ), silicon nitride (Si ₃ N ₄ ), silicon carbide (SiC), molybdenum (Mo), and tungsten (W). Etc.

  The configuration of the electrical wiring board 1300 is shown in FIG. The electric wiring board 1300 transmits a signal for driving the electrothermal transducer 1102 sent from the recording device 3000 (see FIG. 10) to the recording element substrate 1100, and records electric power for driving the electrothermal transducer 1102. A member supplied to the element substrate 1100. The electrical wiring board 1300 is a flexible wiring board in which a wiring pattern is formed on a resin film (film member). The electrical wiring substrate 1300 has a plurality of openings 1330 for incorporating the recording element substrate 1100 therein, and electrodes corresponding to the electrodes 1103 of the recording element substrate 1100 are provided at both ends of the plurality of openings 1330. A terminal 1340 is formed. The electric wiring board 1300 is bonded and fixed to the surface of the base plate 1200 on which the ink supply slit 1210 is formed. The electrical wiring board 1300 includes an electrical signal connection unit 1310 for receiving an electrical signal for driving the recording head 100 from the recording device 3000 and a power supply connection unit 1320 for receiving power from the recording device 3000.

  For example, the electric wiring board 1300 and the electrothermal conversion element 1102 are formed by bonding the electrode 1103 of the recording element board 1100 and the electrode terminal 1340 of the electric wiring board 1300 by a wire bonding technique using a gold wire (not shown). And is electrically connected. The electrodes 1103 of the recording element substrate 1100, the electrode terminals 1340 of the electric wiring substrate 1300, and the wires are covered with a sealant, and are protected from ink corrosion and external impact.

  The structure of support member A1400 and support member B1405 is shown in FIG. Two support members 1400 and 1405 are members for attaching the recording head 100 to the recording apparatus 3000. The support members 1400 and 1405 are members that support the base plate 1200 by being provided at both ends in the longitudinal direction of the base plate 1200, respectively. The detailed configuration of the support members 1400 and 1405 will be described later.

  The side plates 1600 and 1650 are thin plate-like members that cover the side surfaces of the recording head 100. As shown in FIG. 2, the side plate A1600 is obtained by attaching a plate-like side plate 1610 to a rod-like base bar A1601. The side plate B1650 is obtained by attaching a plate-like side plate 1610 to a rod-like base bar B1651 integrally formed with a plate-like wiring substrate fixing portion 1655 for fixing the power connection portion 1320 of the electric wiring substrate 1300. is there. The side plates 1600 and 1650 are bridged between the support members 1400 and 1405 so as to cover the surface of the electric wiring board 1300 bent to the side surface of the recording element unit, and are fixed to the support members 1400 and 1405.

  The configuration of the ink supply member 1500 is shown in FIG. The ink supply member 1500 is a member that is connected to the connection unit 3410 (see FIG. 11A) on the recording apparatus 3000 side and supplies ink from the recording apparatus 3000 to the recording element unit 1000. The ink supply member 1500 is made of, for example, a resin material, and is provided with two connection portions 1510 connected to the recording apparatus 3000 and two openings 1520 connected to the base plate 1200. In order to circulate ink between the printing apparatus 3000 and the printing element unit 1000, two connection portions 1510 and two opening portions 1520 are provided. In addition, an ink flow path (not shown) that connects the connection portion 1510 and the opening 1520 is provided inside the ink supply member 1500, and in the middle of the ink flow path, foreign matter mixed in the ink or A filter (not shown) for removing bubbles is arranged. A joint rubber for joining to the ink supply pipe of the printing apparatus 3000 is attached to the connection unit 1510, and the connection unit 1510 is connected to the connection unit 3410 of the printing apparatus 3000. Further, the ink supply member 1500 is positioned with respect to the base plate 1200 such that the opening 1520 communicates with the ink inlet 1230 and the outlet 1240 (see FIG. 4) formed near the end of the base plate 1200.

(Drive circuit board unit)
The configuration of the drive circuit board unit 2000 is shown in FIG. FIG. 8 shows a state where the cover-2300 is removed.

  A drive circuit board 2100 for controlling the ejection drive of the recording head 100 is housed and fixed in the drive circuit board unit 2000. The drive circuit board 2100 includes an electric signal connector 2110 that is electrically connected to an electric signal connection portion 1310 provided on the electric wiring board 1300 of the recording element unit 1000, and a power connector that supplies power to the recording element unit 1000. -2120 is arranged. The power connector 2120 on the drive circuit board 2100 side and the power connection part 1320 on the electric wiring board 1300 side of the recording element unit 1000 are electrically connected via a wire harness 2130.

(2) Coupling of Recording Element Unit and Drive Circuit Board Unit As shown in FIG. 1, the recording head 100 is a combination of the recording element unit 1000 and the drive circuit board unit 2000, and the coupling is as follows. Has been made.

  First, the drive circuit board unit 2000 is formed on the support elements 1400 and 1405 provided on both ends of the recording element unit 1000 in the longitudinal direction on the opposite side of the recording element unit 1100 from the surface on which the recording element board 1100 is provided. Supported and screwed. As shown in FIG. 9, the wire harness 2130 connected to the drive circuit board 2100 is connected to the power supply connection portion 1320 attached to the electric wiring board 1300 of the recording element unit 1000. The vicinity of the power supply connection portion 1320 of the recording element unit 1000 is fixed to a wiring board fixing portion 1655 formed integrally with the side plate B 1650 (see FIG. 1C). The wiring board fixing portion 1655 is fixed to the support members 1400 and 1405 of the recording element unit 1000.

  As shown in FIG. 1, the drive circuit board unit 2000 is covered with a cover-2300. Further, the recording element unit 1000 and the drive circuit board unit 2000 are coupled, and there is almost no gap between the recording element unit 1000 and the drive circuit board unit 2000.

(3) Inkjet recording apparatus FIG. 10 shows the configuration of a recording apparatus 3000 as a liquid ejection apparatus to which the present invention is applicable. The recording apparatus 3000 is a line printer that performs recording while continuously transporting a recording sheet 3200 as a recording medium in a transport direction (X direction shown in FIG. 9) using a long full-line recording head 100. . The recording apparatus 3000 uses a recording head 3 with respect to a holder (not shown) that holds a recording sheet 3200 wound in a roll, a conveyance mechanism 3300 that conveys the recording sheet 3200 in the X direction at a predetermined speed, and the recording sheet 3200. A recording unit 3100 that performs recording. The recording sheet 3200 is not limited to a continuous roll sheet, and may be a cut sheet. Further, the recording apparatus 3000 includes an ink tank (not shown) that stores ink to be supplied to the recording head 100. The recording unit 3100 is provided with a plurality of recording heads 100 corresponding to different ink colors in parallel. In this embodiment, the four recording heads 100 corresponding to four colors of cyan, magenta, yellow, and black are used. However, the number of colors and the types of colors are not limited to this.

  A recording apparatus 3000 with the recording head 100 mounted is shown in FIG. A connecting portion 1510 provided at both ends in the longitudinal direction of the recording head 100 is connected to a connection unit 3410 of the recording apparatus 3000. In this connected portion, ink is introduced into the recording head 100, and the recording head is connected. Ink is derived from 100. Each color ink is supplied from the ink tank to the recording head 100 via the ink tube 3420.

  Positioning holes 1410 and 1415 (see FIG. 6) arranged on the inner side in the longitudinal direction of the recording head 100 from the connection portion 1510 are fitted with the positioning pins 3430 of the head holder 3400. Further, the recording head 100 is positioned with respect to the recording apparatus 3000 by the tip of the position adjusting screw 1430 of the recording head 100 being in contact with a head holder 3400 as a contact portion. Support members 1400 and 1405 provided at both ends of the recording head 100 are fixed and held on the recording apparatus 3000 by head fixing bolts 1450, respectively.

(Embodiment)
Next, the support member used in the liquid discharge head to which the present invention can be applied will be described in detail. FIG. 12 is an exploded perspective view of the support members A1400 and B1405 shown in FIG. The two support members 1400 and 1405 are members for mounting the recording head 100 at appropriate positions of the recording apparatus 3000 in the X, Y, and Z directions shown in FIG. The X direction shown in FIG. 9 is the conveyance direction of the recording sheet 3200, the Y direction is along the surface of the recording sheet 3200 and perpendicular to the conveyance direction of the recording sheet 3200, and the Z direction is the surface of the recording sheet 3200. The direction perpendicular to.

  The support member A 1400 and the support member B 1405 are configured by a positioning plate A 1401, a positioning plate B 1406, and a position adjusting screw 1430 incorporated in the bush 1420.

  The positioning plates 1401 and 1406 are formed with positioning holes for fitting with positioning pins 3430 (FIG. 11A) provided in the recording apparatus 3000 when the recording head 100 is mounted on the recording apparatus. . The positioning hole A1410 of the positioning plate A1401 used for the support member A1400 is a round hole, and the positioning hole B1415 of the positioning plate B1406 used for the support member B1405 is a long hole extending in the longitudinal direction of the base plate 1200. . The two positioning holes 1410 and 1415 are for mounting the recording head 100 at appropriate positions in the X direction and the Y direction shown in FIG. Since the recording head 100 has a shape extending in the Y direction, it is more difficult to adjust the position of the recording device 3000 in the Y direction than in the X direction, which is the short direction. Therefore, since the positioning hole B1415 is a long hole that is long in the Y direction, the position in the Y direction can be easily adjusted. Positioning holes 1410 and 1415 during the assembly process of the recording element unit 1000 so that the position of the recording element substrate 1100 becomes an appropriate position with respect to the X direction and the Y direction in FIG. 9 when the recording head 100 is mounted on the recording apparatus 3000. Are aligned. Then, the positioning plates 1401 and 1406 are bonded and fixed to the support members 1400 and 1405.

  In addition, the position adjusting screw 1430 is incorporated in the bush 1420, and two bushes 1420 are arranged on the two support members 1400 and 1405 in parallel in the short direction of the recording head 100. Further, a male screw position adjusting screw 1430 is incorporated in the female screw bush 1420. For example, the pitch of both screws is a fine pitch of about 0.25 mm. In order to perform adjustment with higher accuracy, the pitch of the screw is desirably 0.25 mm or less.

  The position of the tip of the position adjusting screw 1430 determines the position of the discharge port surface 1106 in the direction perpendicular to the discharge port surface 1106 (see FIG. 3) where the discharge port 1105 of the recording element substrate 1100 is provided. The tip of the position adjusting screw 1430 is brought into contact with a head holder 3400 (see FIG. 11) that supports the recording head 100 when the recording head 100 is attached to the recording apparatus 3000. That is, the position of the tip of the position adjusting screw 1430 determines the distance between the recording sheet 3200 and the ejection port surface 1106 of the recording element substrate 1100.

  The position of the tip of the position adjusting screw 1430 is adjusted to be an appropriate position during the assembly process of the recording element unit 1000 as follows, for example. First, the positions of the ejection port surfaces 1106 of the plurality of recording element substrates 1100 arranged in the recording element unit 1000 are measured from a certain reference plane, and the positions are averaged to create a virtual plane. Then, the position adjustment screw 1430 is rotated so that the virtual plane is at a predetermined position, and the position of the tip portion is adjusted. At this time, since the position adjusting screw 1430 is a fine pitch screw having a pitch of about 0.25 mm, fine position adjustment is possible. Further, after the position adjustment screw 1430 is adjusted, the position adjustment screw 1430 is fixed to the bush 1420 so as not to move by an adhesive or the like so that the position of the tip portion does not change.

  Since the position of the discharge port surface 1106 of the recording head 100 is determined by the position of the tip of the position adjusting screw 1430, the position can be adjusted easily and accurately by rotating the position adjusting screw 1430. . In addition, since the position of the recording head 100 can be adjusted even in the final process at the time of assembling the recording head 100, all the component tolerances and assembly errors related to accuracy among the members constituting the recording head 100 can be canceled. Further, the position of the positioning portion is determined without any adhesive, and when the recording head is mounted on the recording apparatus, the position adjusting screw 1430, which is a positioning member, receives a force directly. For this reason, a positional shift due to adhesive fixing or a positional shift due to deformation due to an external force of the adhesive does not occur.

  It is also possible to select an adhesive that can rotate the position adjusting screw 1430 again when a large torque is applied. In this case, even if the position of the tip of the position adjusting screw 1430 is changed after the recording head 100 is assembled or after the recording head 100 is mounted on the recording apparatus 3000, the readjustment is possible.

  In this embodiment, the position adjusting screw 1430 is attached to the support members 1400 and 1405 via the bush 1420, but the position adjusting screw 1430 may be directly attached to the support members 1400 and 1405.

  In the present embodiment, two position adjusting screws 1430 are disposed on one side of the end of the recording head 100 in the longitudinal direction, and a total of four on both sides.

  When performing full color recording with a recording apparatus equipped with a full line type recording head, a plurality of recording heads corresponding to the number of colors, such as at least four, six, or seven, are used. It is necessary to arrange them side by side (see FIG. 10). Accordingly, if the dimension (width dimension) in the short direction of the recording head is large, the recording apparatus becomes large and the recording area in the recording sheet conveyance direction increases, making it difficult to ensure the conveyance accuracy of the recording medium. Become. In particular, when a recording sheet is conveyed at high speed, the possibility of occurrence of paper jam increases. Since the demand for downsizing and high-speed recording of recording apparatuses is increasing, it is necessary to make the recording area in the transport direction as small as possible. Therefore, it is desirable that the size of the recording head in the short direction is smaller.

  When an object is supported, generally three-point support is desirable. However, the recording head 100 to which the present invention can be applied has a narrow width in the short direction of the recording head 100 as shown in FIGS. A drive circuit board unit 2000 that is a relatively heavy member is attached to the upper part of the recording head 100. Therefore, when the recording head 100 is supported at three points at both ends in the longitudinal direction and is fixed to the recording apparatus 3000, the fixing state is not stable and is easy to move. Therefore, in order to fix the recording head 100 of this embodiment with three-point support, a very large force may be required. Therefore, it is more preferable that two position adjusting screws 1430 are disposed at both ends in the longitudinal direction of the recording head 100 so that the recording head 100 is supported at four points at the tip of the position adjusting screw 1430. As a result, it is possible to fix the recording head 100 to the recording apparatus 3000 with a relatively small force and to prevent the recording head 100 from being inclined in the short direction of the recording head 100.

  However, in the four-point support configuration, if the four-point step is large, twisting and distortion may occur when the recording head is fixed to the recording apparatus, and the recording element unit may be deformed. Therefore, in this embodiment, the difference in position of the tip portions of the four position adjusting screws 1430 is 20 μm or less for the position adjusting screw 1430 of the same supporting member, and about 50 μm or less for the position adjusting screw 1430 of different supporting members. It is adjusted. By adjusting in this way, the recording element unit 1000 can be prevented from being twisted and distorted, and the deformation of the recording element substrate 1100 can be suppressed to about 1 μm or less, and the possibility of impairing the recording function can be suppressed.

100 recording head (liquid ejection head)
1100 Recording element substrate 1102 Electrothermal conversion element (recording element)
1200 Base plate 1430 Positioning adjustment screw

Claims (7)

A liquid discharge head for discharging liquid,
A liquid ejection member having a recording element substrate comprising: an ejection port surface on which an ejection port for ejecting liquid is formed; and a plurality of recording elements that generate energy for ejecting liquid from the ejection port;
A direction that is provided at both ends of the liquid discharge member with respect to the arrangement direction in which the plurality of recording elements are arranged, and whose tip is perpendicular to the discharge port surface when the liquid discharge head is mounted on the liquid discharge apparatus A plurality of screws in contact with the liquid ejection device with respect to
Have
A liquid discharge head, wherein the position of the discharge port surface in the vertical direction can be adjusted by rotating the plurality of screws.   2. The liquid discharge head according to claim 1, wherein the plurality of screws are provided in two at each of the both end portions of the liquid discharge member. The liquid discharge head includes support members that are provided at both ends of the liquid discharge member and support the liquid discharge member.
The liquid ejection head according to claim 1, wherein the plurality of screws are provided on the support member.   The support member has a fixing portion for fixing the liquid discharge head to the liquid discharge device, and the plurality of screws are perpendicular to the direction in which the discharge port is provided and the arrangement direction. The liquid discharge head according to claim 3, wherein the liquid discharge head is provided on both sides of the fixed portion with respect to any direction.   The liquid discharge head according to claim 1, wherein a pitch of the screw is 0.25 mm or less.   The recording element is disposed on the liquid discharge member over the size of the recording medium in a direction orthogonal to a conveyance direction for conveying the recording medium that receives the liquid ejected from the liquid ejection head. The liquid discharge head according to any one of claims 1 to 5. A liquid discharge device for discharging a liquid,
A liquid ejection member having a recording element substrate comprising: an ejection port surface on which an ejection port for ejecting liquid is formed; and a plurality of recording elements that generate energy for ejecting liquid from the ejection port;
A liquid ejection head having a plurality of screws provided at both ends of the liquid ejection member with respect to an arrangement direction in which the plurality of recording elements are arranged;
When the liquid discharge head is mounted on the liquid discharge device, a contact portion with which the tips of the plurality of screws contact with respect to a direction perpendicular to the discharge port surface;
Have
The liquid discharge apparatus according to claim 1, wherein the position of the discharge port surface in the vertical direction can be adjusted by rotating the plurality of screws.

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