Liquid discharge head and liquid discharge device

Abstract

This technology provides a way to suppress productivity degradation in a liquid discharge head equipped with a sub-tank and a circulation pump. [Solution] The electrical circuit board 103 is placed between the sub-tank 105, which is the storage section, and the element board 107.

Description

Technical Field

[0001] The present invention relates to a liquid ejection head and a liquid ejection device.

Background Art

[0002] Patent Document 1 discloses a liquid ejection head in which the main body part has a box shape, a sub-tank is mounted inside the box, and a circuit board is provided on the back surface.

[0003] In the configuration of the liquid ejection head, as a countermeasure against thickening of the liquid, sedimentation of the coloring material, retention of bubbles or foreign substances in the liquid ejection head or the liquid supply passage, a configuration in which the liquid is circulated in the liquid ejection head by a circulation pump mounted in the sub-tank may be used. In order to drive the circulation pump, it is necessary to connect a connector (electrical connection part) provided on the circuit board and a harness (electrical wiring) extending from the sub-tank for transmission of an electrical signal to the circulation pump and power supply.

Prior Art Documents

Patent Documents

[0004]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0005] When a circulation pump is mounted in the sub-tank of Patent Document 1, in the manufacturing process, it is necessary to connect a connector of the circuit board provided on the back surface of the main body part of the liquid ejection head and a harness extending from the sub-tank. However, the back side of the liquid ejection head on which the sub-tank is mounted has space limitations, and the space around the connector is narrow, so the workability of the connection work is poor, and there is a risk of a decrease in productivity.

[0006] Therefore, the present invention provides a technology to suppress a decrease in productivity in a liquid discharge head equipped with a sub-tank and a circulation pump. [Means for solving the problem]

[0007] Therefore, the liquid discharge head of the present invention comprises a storage section for storing liquid, an element substrate equipped with a discharge element for discharging the liquid stored in the storage section from a discharge port, a pump for circulating the liquid between the storage section and the element substrate, and an electrical circuit board for relaying power and electrical signals for driving the pump and the element substrate, wherein the pump and the electrical circuit board are connected by a connector, and the electrical circuit board is positioned between the storage section and the element substrate. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a technology that suppresses a decrease in productivity in a liquid discharge head equipped with a sub-tank and a circulation pump. [Brief explanation of the drawing]

[0009] [Figure 1] (a) is a schematic perspective view of the liquid dispensing device, and (b) is a block diagram showing the control system. [Figure 2] This is an exploded perspective view showing an example of a liquid dispensing head. [Figure 3] This figure shows an example of the connection state between an electrical circuit board and an element board. [Figure 4] This is a schematic cross-sectional view of a liquid dispensing head. [Figure 5] This is a top view showing an electrical circuit board. [Modes for carrying out the invention]

[0010] Embodiments of the present invention will be described below with reference to the drawings.

[0011] Figure 1(a) is a schematic perspective view of a liquid dispensing device 50 using a liquid dispensing head 100, and Figure 1(b) is a block diagram showing the control system of the liquid dispensing device 50. First, the coordinate axes in the figures will be explained. In the drawings referred to herein, the X and Y directions represent two mutually orthogonal directions on the horizontal plane. The Z direction represents the vertical direction. When the liquid dispensing head 100 is mounted on the liquid dispensing device 50, the +Y direction represents the rear of the liquid dispensing head 100, the -Y direction represents the front, the -X direction represents the left, the +X direction represents the right, the +Z direction represents the up, and the -Z direction represents the down. The +Y direction is also downstream in the transport direction of the recording medium, and the -Y direction is upstream in the transport direction of the recording medium. The X direction will be referred to as the scanning direction as appropriate. In the following description, unless otherwise specified, up, down, and left and right refer to the directions in the operating position when the liquid dispensing head 100 is used in its normal state.

[0012] In this embodiment, the explanation assumes that the "liquid" is ink. However, the liquid that can be used in this embodiment is not limited to ink. That is, various recording fluids may be used as the liquid, including processing fluids used for the purpose of improving ink fixation on the recording medium, reducing gloss unevenness, or improving scratch resistance.

[0013] In this embodiment, the "recording medium" is assumed to be paper used in a general liquid dispensing device. However, the "recording medium" is not limited as long as it is a medium capable of receiving liquid. Other examples of the "recording medium" include cloth, plastic film, metal plate, glass, ceramics, resin, wood, or leather.

[0014] "Recording" does not mean only forming meaningful information such as text and figures. "Recording" also means forming meaningless information such as images, patterns, or designs. Furthermore, "recording" does not require whether or not it is manifested in a way that humans can perceive visually. In other words, "recording" also means forming structures on a recording medium or processing the medium itself.

[0015] The liquid ejection device 50 is a serial scan inkjet recording device that can be fitted with a liquid ejection head 100 and ejects ink from the liquid ejection head 100 to record an image on the recording medium P. The liquid ejection head 100 is mounted on a carriage 53, and the carriage 53 moves along the guide axis 51 in the main scanning direction in the X direction. The liquid ejection head 100 performs recording scanning while ejecting ink.

[0016] The recording medium P is transported by transport rollers 55, 56, 57, and 58 in a sub-scanning direction in the +Y direction that intersects (orthogonal in this example) the main scanning direction. The ejection energy generating element (ejection element) in the ejection unit 300 is driven by the head driver 509 in response to an input signal from the electrical connection board. Wiring that sends the electrical input signal necessary for ejection and piping that supplies ink and air are connected to the liquid ejection head 100 as a guide 59. An electrical input signal is supplied from the head driver 509 via the guide 59, and ink is supplied from the ink tank 2 to the liquid ejection head 100 via the guide 59.

[0017] The liquid dispensing device 50 is equipped with a transport section (transport rollers 55, 56, 57, 58) for transporting the recording medium P in the transport direction (+Y direction) (see Figure 1(a)). The liquid dispensing device 50 drives the transport section to perform a transport operation, intermittently moving the recording medium P in the transport direction, while moving the liquid dispensing head 100 in the scanning direction to dispense liquid and perform recording. In this way, the liquid dispensing device 50 performs recording on the recording medium P by alternately performing recording and transport operations.

[0018] The liquid ejection head 100 is capable of full-color printing using CMYK inks (cyan, magenta, yellow, black). A cap member (not shown) is positioned outside the transport path of the recording medium P. When the liquid ejection head 100 is not performing a recording operation, the cap member moves relative to the face surface of the liquid ejection head 100 where the ejection port is formed, preventing the ejection port from drying out and performing suction operations for filling and recovery.

[0019] The CPU (control unit) 501 controls the recording device 50 based on programs such as processing procedures stored in the ROM 506, and the RAM 507 is used as a work area for executing those processes. The CPU 501 controls the head driver 509 based on image data from the host device 500 outside the liquid ejection device 50. Also, the CPU 501 controls the carriage motor 503 for moving the carriage 53 via the motor driver 502, and controls the conveyance motor 505 for conveying the recording medium P via the motor driver 504. In this embodiment, the CPU 501 reads the program stored in the ROM 506, expands the program in the RAM 507, and executes it, thereby enabling ink to circulate inside the liquid ejection head 100.

[0020] FIG. 2 is an exploded perspective view showing an example of the liquid ejection head 100 to which this embodiment can be applied. The liquid ejection head 100 can be detachably attached to a liquid ejection device 50 capable of performing recording on a recording medium by ejecting liquid in a so-called serial manner. The liquid ejection head 100 is attached to a carriage 53 capable of reciprocating in the scanning direction (±X direction). In the state of being attached to the carriage 53, the liquid ejection head 100 can perform recording by ejecting liquid onto the recording medium P while reciprocating in the scanning direction (±X direction).

[0021] The liquid ejection head 100 includes four individual units 101 capable of ejecting liquid individually. The liquid ejection head 100 includes a base member 102 capable of supporting all the individual units 101, an electric circuit board 103 disposed on the base member 102, and a cover 104 capable of covering the electric circuit board 103. In this embodiment, the cover 104 is detachable from the base member 102. However, the cover 104 may be fixed so that it cannot be easily removed from the base member 102.

[0022] Each of the four individual units 101 includes a sub-tank 105 that functions as a reservoir capable of temporarily storing the liquid used for recording, a flow channel section 106 with a flow channel formed therein, and an element substrate 107 which is a semiconductor device capable of discharging the liquid. The electrical circuit board 103 and each of the four element substrates 107 are connected by a flexible substrate 108. That is, in this embodiment, four flexible substrates 108 are used.

[0023] In this embodiment, the liquid discharge head 100 has an electrical circuit board 103 positioned between the sub-tank 105 and the element substrate 107. Details of the electrical circuit board 103 will be described later.

[0024] In this embodiment, two flow channels are formed inside the flow channel section 106, which fluidly connect the sub-tank 105 and the element substrate 107.

[0025] The element substrate 107 has a discharge port surface formed in a predetermined direction, consisting of a row of energy generating elements (e.g., heaters) that generate energy to discharge liquid, and a row of discharge ports for discharging liquid. The row of discharge ports is formed along the transport direction (Y direction) of the recording medium P. Each of the multiple energy generating elements is provided at a position corresponding to each of the multiple discharge ports. When the energy generating elements are driven, droplets are discharged from the discharge ports. An electrical signal (discharge signal) for driving the energy generating elements is generated by the control unit described above. The CPU 501 transmits the discharge signal from the main body of the liquid discharge device 50 to the electrical circuit board 103 via the electrical connection member 109.

[0026] In this embodiment, a flexible cable is used as the electrical connection member 109. The discharge signal received by the electrical circuit board 103 is transmitted to the element board 107 via the flexible board 108. The element board 107 is provided with terminals capable of receiving the discharge signal. The head driver 509 (see Figure 1(b)) drives the energy generating element to discharge liquid from the discharge port according to the discharge signal received by the element board 107.

[0027] Each of the four individual units 101 is assembled to the liquid discharge head 100 by being fixed to the base member 102. The sub-tank 105 is surrounded by a cover 104. The cover 104 is mounted from top to bottom in the vertical direction and fixed to the base member 102.

[0028] In this embodiment, four individual units 101 are used, but the number of individual units 101 is not limited to four. There may be four or more individual units 101, or fewer than four individual units 101.

[0029] Figure 3 shows an example of the connection state between the electrical circuit board 103 and the element board 107 in this embodiment.

[0030] The electrical circuit board 103 is positioned vertically above the flow channel section 106 so that its front and back surfaces are horizontal when in use. Therefore, the electrical circuit board 103 has a top surface facing upward (+Z direction) and a bottom surface facing downward (-Z direction). First openings 201 are formed on the electrical circuit board 103, corresponding to each color element substrate 107.

[0031] The flexible substrate 108 is positioned to pass through the first opening 201. The end of the flexible substrate 108 (not shown in Figure 3) is connected to approximately the center in the Y direction on the upper surface of the electrical circuit board 103. The flexible substrate 108 extends from the upper surface of the electrical circuit board 103, through the first opening 201, along the side surface of the flow channel 106 (the surface facing the -X direction in Figure 2).

[0032] An element substrate 107 is attached to the bottom surface of the flow channel section 106 (the surface facing the -Z direction in Figure 2). The flexible substrate 108 extends from the side of the flow channel section 106 along the bottom surface, bending at approximately 90°. The shape of the element substrate 107, when viewed from the bottom, is a rectangle with a long side and a short side. An electrical contact portion is provided on the bottom surface of the element substrate 107 (the surface facing the -Z direction in Figure 3) to which the end of the flexible substrate 108 is connected. The electrical contact portion is provided at the end of the flexible substrate 108 in the extending direction, along the width direction of the flexible substrate 108 (Y direction in the figure).

[0033] More specifically, at the end of the flexible substrate 108 in the extending direction, multiple terminals are arranged along the width direction of the flexible substrate 108 to form an electrical contact area. The flexible substrate 108 contains multiple wirings 203 (for example, copper foil). The electrical contact area is sealed with a sealing material 202 after the element substrate 107 and the flexible substrate 108 are electrically connected. In the flexible substrate 108, the individual wirings 203 are arranged linearly along the extending direction of the flexible substrate 108.

[0034] With this arrangement, the area for arranging the wiring 203 on the bottom surface of the liquid dispensing head 100 can be kept relatively compact. In other words, it becomes possible to miniaturize the bottom surface of the liquid dispensing head 100 and the entire liquid dispensing head. As described above, on the bottom surface of the liquid dispensing head 100, taking into consideration the miniaturization of the liquid dispensing head 100 and production costs, the electrical contacts of each wire are arranged linearly along the extending direction of the flexible substrate 108 without changing the direction in which the wiring 203 extends.

[0035] Figures 4(a) and 4(b) are schematic cross-sectional views of the liquid discharge head 100 in this embodiment. In Figures 4(a) and 4(b), the liquid discharge head 100 is shown mounted on the liquid discharge device 50. In Figure 4(a), the liquid discharge head 100 is cut by a plane parallel to the XZ plane. In Figure 4(b), the liquid discharge head 100 is cut by a plane parallel to the YZ plane.

[0036] As shown in Figure 4(a), a second opening 401 is formed on the top surface of the cover 104. The sub-tank 105 is provided with a supply port 402 for supplying liquid from the main tank (not shown), and the supply port 402 is located inside the second opening 401. The electrical circuit board 103 is provided with a third opening 403.

[0037] The base member 102 is provided with a fourth opening 404 and a sixth opening 414 (see Figure 4(b)) through which a portion of the flow path 106 passes. The flow path 106 is provided with a supply flow path 406 connected to the sub-tank 105 for supplying liquid from the sub-tank 105 to the element substrate 107. The supply flow path 406 is formed to pass through the third opening 403 and the fourth opening 404. The flow path 106 also has a recovery flow path 413 for recovering liquid from the element substrate 107 to the sub-tank 105 when the liquid is circulated. The recovery flow path 413 is formed to pass through the sixth opening 414 provided in the base member 102 and the seventh opening 415 provided in the electrical circuit board 103. The sub-tank 105 and the flow path 106 are connected to each other via the supply flow path 406 and the recovery flow path 413.

[0038] An electrical connection section 407 (specifically, multiple terminals) is provided on the upper surface of the electrical circuit board 103, to which the end of the flexible board 108 is connected. The flexible board 108 and the element board 107 are connected via wire 408. The wire 408 is sealed with a sealing material 202.

[0039] With the liquid discharge head 100 attached to the liquid discharge device 50, the electrical circuit board 103 and the element board 107, which has a discharge port capable of discharging liquid, are arranged parallel (almost horizontally).

[0040] The flexible substrate 108 is positioned so as to pass through the electrical connection portion 407 provided on the upper surface of the electrical circuit board 103, the first opening 201 provided on the electrical circuit board 103, and the fifth opening 405 provided on the base member 102. The flexible substrate 108 is positioned along the side and bottom surfaces of the flow channel portion 106 and is connected to the wire 408. The terminals of the flexible substrate 108 and the terminals provided on the element substrate 107 are connected by wire bonding using the wire 408.

[0041] When recording is performed by the liquid discharge head 100, the liquid used for recording is supplied from the main tank (not shown) to the sub-tank 105 via the supply port 402. The liquid is temporarily stored in the sub-tank 105. When the sub-tank 105 is incorporated into the liquid discharge head 100, the sub-tank 105 is positioned vertically above the electrical circuit board 103. The liquid stored in the sub-tank 105 is supplied to the element board 107 via the supply channel 406.

[0042] When a discharge signal for discharging liquid is transmitted via the flexible substrate 108 and wire 408 to the energy generating element provided on the element substrate 107, liquid is discharged from the discharge port. Liquid that is not discharged from the element substrate 107 is recovered into the sub-tank 105 via the recovery channel 413.

[0043] In this embodiment, as shown in Figure 4(b), a first connector 410 is provided on the upper surface of the electrical circuit board 103, to which an electrical connection member 109 can be connected for transmitting an electrical signal (e.g., a discharge signal) generated by the main body of the liquid discharge device 50 to the electrical circuit board 103. The first connector 410 is provided at the +Y end of the surface of the electrical circuit board 103 facing the +Z direction. An eighth opening 420 is provided in the cover 104 opposite the first connector 410, and the electrical connection member 109 and the first connector 410 are connected through the eighth opening 420. In the manufacturing process of the liquid discharge head 100, the connection between the electrical connection member 109 and the first connector 410 is performed before the sub-tank 105 and the cover 104 are installed, so there is ample workspace and the connection can be easily made.

[0044] In this embodiment, in order to obtain stable discharge performance even when the liquid becomes highly viscous, the liquid discharge head 100 is configured to circulate the liquid internally. A pump 416 for circulating the liquid is provided inside the sub-tank 105. The source signal for driving the pump 416 is generated by the pump control unit (e.g., CPU 501). This source signal is input from the main body of the liquid discharge device 50 via an electrical connection member 109 to a first connector 410 provided on the upper surface of the electrical circuit board 103.

[0045] In the electrical circuit board 103, the source signal for driving the pump 416 is transmitted to the second connector 412 located on the upper surface of the electrical circuit board 103, via a circuit provided on the electrical circuit board 103. With the harness 411 connected to the second connector 412 (connector connection), the source signal is transmitted via the harness 411 to the pump 416 located inside the sub-tank 105. The harness 411 can be attached to and detached from the second connector 412.

[0046] With this configuration, when a drive signal for driving the pump 416 is input to the first connector 410 via the electrical connection member 109, the drive signal is transmitted to the second connector 412 via a circuit provided on the electrical circuit board 103. The drive signal is then transmitted to the pump 416 via the harness 411. When the pump 416 is driven by the drive signal, the liquid is supplied from the pump 416 to the element substrate 107 via the supply channel 406, and then recovered from the element substrate 107 to the pump 416 via the recovery channel 413. By circulating the liquid in the liquid discharge head with the pump 416, it is possible to reduce the viscosity of the liquid in the liquid discharge head, the settling of colorants, and the accumulation of foreign matter.

[0047] In a system that circulates such liquid, by configuring the system so that the liquid passes through the supply channel 406 and the recovery channel 413 at openings provided in the base member 102 and the electrical circuit board 103, it becomes possible to miniaturize the entire liquid discharge head even if multiple individual units 101 are provided.

[0048] In this embodiment, the harness 411 is connected to the second connector 412 after the sub-tank 105 is assembled and before the cover 104 is attached. The harness 411 connection process becomes less efficient if there are many obstacles around the second connector 412. However, in this embodiment, the electrical circuit board 103 is located directly below the sub-tank 105, and there are no walls of the base member 102 around the second connector 412, resulting in a configuration that facilitates the process.

[0049] Furthermore, in this embodiment, a second connector 412 is used that extends linearly upward in the vertical direction from the upper surface of the electrical circuit board 103. The harness 411 extends downward in the vertical direction. Therefore, the worker can easily connect the harness 411 to the second connector 412 with the harness 411 pointing downward in the vertical direction. With this configuration, the harness 411 and the second connector 412 can be connected without requiring complicated work, thus suppressing a decrease in productivity.

[0050] Figure 5 is a top view showing an electrical circuit board 103 to which this embodiment can be applied. The top surface of the electrical circuit board 103 is provided with an electrical connection area and an electrical component mounting area. In this embodiment, the electrical connection area includes an electrical connection section 407, a first connector 410, and a second connector 412. The electrical component mounting area includes a memory device 511 for recording information about the liquid discharge head 100, and a pump drive circuit 512 for converting a source signal for driving the pump into a drive signal. Thus, in this embodiment, the electrical connection area and the electrical component mounting area are integrated on the top surface of the electrical circuit board 103.

[0051] Furthermore, the electrical circuit board 103 has a third opening 403 for passing through the supply channel 406 (see Figure 4) and a seventh opening 415 for passing through the recovery channel 413 (see Figure 4). It is desirable that the electrical connection part 407 connecting the flexible substrate 108 and the electrical circuit board 103 be sealed with a sealing material (not shown in Figure 5). With such a configuration, electrical safety can be maintained.

[0052] Thus, according to the liquid discharge head 100 of this embodiment, the electrical circuit board 103 is positioned between the sub-tank 105, which is the storage section, and the element board 107. This makes it possible to shorten the time required for assembly work in the production process and suppress a decrease in productivity in a liquid discharge head equipped with a sub-tank and a pump 416.

[0053] This embodiment includes the following configuration.

[0054] (Composition 1) A storage section for storing liquid, An element substrate equipped with a discharge element for discharging the liquid stored in the storage section from a discharge port, A pump for circulating liquid between the storage unit and the element substrate, An electrical circuit board that relays power and electrical signals for driving the pump and the element substrate, Equipped with, A liquid discharge head to which the pump and the electrical circuit board are connected by a connector, A liquid dispensing head characterized in that the electrical circuit board is arranged between the storage section and the element substrate.

[0055] (Configuration 2) The pump is a liquid discharge head as described in configuration 1, provided inside the storage section.

[0056] (Composition 3) The electrical circuit board and the element board are connected by a flexible substrate, The liquid dispensing head according to configuration 1 or 2, wherein the electrical circuit board has a first opening through which the flexible substrate passes.

[0057] (Composition 4) The storage section is covered with a cover, The liquid dispensing head according to any one of configurations 1 to 3, wherein the cover has a second opening through which a supply port provided in the storage section passes.

[0058] (Composition 5) The storage section and the element substrate are provided with a fluidic flow channel section, The liquid discharge head according to any one of configurations 1 to 4, wherein the electrical circuit board has a third opening for passing through the flow channel.

[0059] (Composition 6) The liquid discharge head according to configuration 5 includes a first flow path for supplying liquid from the storage section to the element substrate and a second flow path for recovering liquid from the element substrate to the storage section.

[0060] (Composition 7) The electrical circuit board is provided with a base member that supports the aforementioned electrical circuit board, The base member is a liquid discharge head according to configuration 5, having a fourth opening for passing through the flow path.

[0061] (Composition 8) In the position of the liquid dispensing head when in use, The electrical circuit board and the element board are arranged horizontally. A liquid discharge head according to any one of configurations 1 to 7, wherein the harness of the pump is connected from above in a vertical direction to a connector provided on the upper surface of the electrical circuit board.

[0062] (Composition 9) The liquid discharge head according to configuration 3, wherein the connection between the element substrate and the flexible substrate is sealed with a sealing material.

[0063] (Composition 10) The device comprises a plurality of storage units and a plurality of element substrates corresponding to each of the plurality of storage units, The electrical circuit board is a liquid discharge head according to configuration 5, having a plurality of third openings corresponding to each of the plurality of storage sections.

[0064] (Composition 11) A storage section for storing liquid, An element substrate equipped with a discharge element for discharging the liquid stored in the storage section from a discharge port, A pump for circulating liquid between the storage unit and the element substrate, An electrical circuit board that relays power and electrical signals for driving the pump and the element substrate, A liquid dispensing device comprising a liquid dispensing head to which the pump and the electrical circuit board are connected by a connector, A liquid dispensing device characterized in that the electrical circuit board is arranged between the storage section and the element substrate.

[0065] (Composition 12) Recording scanning involves moving the liquid discharge head in the scanning direction while discharging the liquid, The liquid dispensing device according to claim 11, which records an image on a recording medium by alternately repeating a transport operation that transports the recording medium in a direction intersecting the scanning direction. [Explanation of symbols]

[0066] 50 Liquid dispensing device 100 liquid dispensing heads 103 Electrical circuit board 104 Cover 105 Sub-tank 107 Element Substrate 410 First connector 411 Harness 412 Second connector

Claims

1. A storage section for storing liquid, An element substrate equipped with a discharge element for discharging the liquid stored in the storage section from a discharge port, A pump for circulating liquid between the storage unit and the element substrate, An electrical circuit board that relays power and electrical signals for driving the pump and the element substrate, Equipped with, A liquid discharge head to which the pump and the electrical circuit board are connected by a connector, A liquid dispensing head characterized in that the electrical circuit board is arranged between the storage section and the element substrate.

2. The pump is a liquid discharge head according to claim 1, provided inside the storage section.

3. The electrical circuit board and the element board are connected by a flexible substrate, The liquid dispensing head according to claim 1, wherein the electrical circuit board has a first opening through which the flexible board passes.

4. The storage section is provided with a cover, The liquid dispensing head according to claim 1, wherein the cover has a second opening through which a supply port provided in the storage section passes.

5. The storage section and the element substrate are provided with a fluidic flow channel section, The liquid dispensing head according to claim 1, wherein the electrical circuit board has a third opening for passing through the flow channel.

6. The liquid discharge head according to claim 5, wherein the flow channel portion includes a first flow channel for supplying liquid from the storage portion to the element substrate and a second flow channel for recovering liquid from the element substrate to the storage portion.

7. The electrical circuit board is provided with a base member that supports the aforementioned electrical circuit board, The liquid discharge head according to claim 5, wherein the base member has a fourth opening for passing through the flow path.

8. In the position of the liquid dispensing head when in use, The electrical circuit board and the element board are arranged horizontally. The liquid discharge head according to claim 1, wherein the harness of the pump is connected from above in a vertical direction to a connector provided on the upper surface of the electrical circuit board.

9. The liquid dispensing head according to claim 3, wherein the connection between the element substrate and the flexible substrate is sealed with a sealing material.

10. The device comprises a plurality of storage units and a plurality of element substrates corresponding to each of the plurality of storage units, The liquid dispensing head according to claim 5, wherein the electrical circuit board has a plurality of third openings corresponding to each of the plurality of storage sections.

11. A storage section for storing liquid, An element substrate equipped with a discharge element for discharging the liquid stored in the storage section from a discharge port, A pump for circulating liquid between the storage unit and the element substrate, An electrical circuit board that relays power and electrical signals for driving the pump and the element substrate, A liquid dispensing device comprising a liquid dispensing head to which the pump and the electrical circuit board are connected by a connector, A liquid dispensing device characterized in that the electrical circuit board is arranged between the storage section and the element substrate.

12. Recording scanning involves moving the liquid discharge head in the scanning direction while discharging the liquid, The liquid dispensing device according to claim 11, which records an image on a recording medium by alternately repeating a transport operation that transports the recording medium in a direction intersecting the scanning direction.

Images