JP4649191B2 - Inkjet recording head - Google Patents

Description

The present invention relates to an ink jet recording heads for recording by discharging recording liquid such as ink.

  The present invention can be applied to a general printer, a copying machine, a facsimile having a communication system, a device such as a word processor having a printing unit, and an industrial recording device combined with various processing devices. .

  The ink jet recording apparatus is a so-called non-impact recording type recording apparatus and can record on various media (recording medium). There is a feature that there is almost no noise during recording, and recording can be performed at high speed. For these reasons, the ink jet recording apparatus is used in a wide range of fields as an apparatus that bears a recording mechanism such as a printer, a copying machine, a facsimile having a communication system, and a word processor having a printing unit.

  The inkjet recording apparatus includes a mechanism for transporting a recording medium such as paper, a carriage on which a recording head is mounted, and a mechanism for reciprocating the carriage in a direction crossing the recording medium transport path. It has been known. In this configuration, the paper is transported in a predetermined speed pattern, and the recording head equipped with the recording head is reciprocated and scanned accordingly. At that time, recording liquid is ejected from the recording head according to desired recording information, and recording is performed. Do it. That is, it is a serial recording system, and the configuration of such a serial recording system is widely used as a general configuration because it can be manufactured at low cost and can be easily downsized.

  As a typical configuration of the ink jet recording head, there is one in which an electrothermal conversion element is used as a recording element for discharging droplets. In this configuration, the liquid is heated by the electrothermal conversion element to generate bubbles, whereby the recording liquid is ejected as minute droplets from the minute ejection ports. As an ink jet recording head using an electrothermal conversion element, a type (edge shooter) that discharges recording liquid in a direction parallel to the substrate on which the electrothermal conversion element is arranged, and a direction perpendicular to the substrate There is a type (side shooter) that discharges the recording liquid.

  JP-A-4-10940, JP-A-4-10941, and JP-A-4-10942 disclose suitable methods for recording high-definition image quality with an ink-jet recording head. It is disclosed. This method makes it possible to stabilize the ejection volume and ejection speed of the recording droplets that are ejected by growing the generated bubbles until they reach the ejection port and communicating with the atmosphere. Suitable as a recording method.

  Japanese Patent Laid-Open No. 6-286149 discloses a side shooter type recording head in which it is relatively easy to fly small droplets, and ejects the recording droplets by the atmospheric communication method disclosed in the above three publications. A recording head and a method for manufacturing the same are disclosed. Japanese Patent Laid-Open No. 2002-19119 discloses a configuration in which the material cost of parts is reduced, and in particular, the integration of recording element substrates is advanced while obtaining excellent high-speed response and discharge performance in the above-described atmospheric communication type recording droplet discharge method. Is disclosed.

  FIG. 9 is an exploded perspective view of the ink jet recording head described in Japanese Patent Application Laid-Open No. 2002-19119 as seen obliquely from below. The recording head includes a first recording element substrate 901, a second recording element substrate 902, a first plate 903, an electric wiring tape 904 that is a single wiring tape, a second plate 905, a tank holder 906, a flow path. The forming member 907 includes a joint seal 908, a filter 909, a seal rubber 910, and an ink supply member 911.

  The first recording element substrate 901 and the second recording element substrate 902 include a plurality of recording elements for ejecting ink on one side of the Si substrate, and electric wiring such as Al for supplying power to each recording element. Is formed by a film forming technique, and a plurality of ink flow paths and a plurality of ejection openings 912 corresponding to the recording element are formed by a photolithography technique, and ink supply for supplying ink to the plurality of ink flow paths The mouth is formed so as to open on the back surface.

  Further, the first recording element substrate 901 and the second recording element substrate 902 are bonded and fixed to a first plate 903, which includes the first recording element substrate 901 and the second recording element. An ink supply port 913 for supplying ink to the substrate 902 is formed.

  Further, a second plate 905 having an opening is bonded and fixed to the first plate 903. The second plate 905 electrically connects the electric wiring tape 904 and the first recording element substrate 901 to each other. The electric wiring tape 904 is held so as to be connected. Similarly, the second plate 905 holds the electric wiring tape 904 so that the electric wiring tape 904 and the second recording element substrate 902 are electrically connected.

  The electrical wiring tape 904 applies an electrical signal for ejecting ink to the first recording element substrate 901 and the second recording element substrate 902. It has an electrical wiring corresponding to the recording element substrate 902 and an external signal input terminal 914 that is located at the end of the electrical wiring tape and receives an electrical signal from the main body. It is positioned and fixed on the back side of the supply member 911. A form in which the first plate 901 supports the first recording element substrate 902, the second recording element substrate 902, the second plate 105, and the electric wiring tape 904 is referred to as a recording element unit.

  On the other hand, a flow path forming member 907 is fixed to a tank holder 906 that detachably holds an ink tank by, for example, ultrasonic welding, and an ink flow path 915 extending from the ink tank to the first plate 903 is formed.

  In addition, a filter 909 is provided at an end of the ink flow path 915 that engages the ink tank on the ink tank side so that dust can be prevented from entering from the outside. In addition, a seal rubber 910 is attached to the engaging portion with the ink tank so that ink can be prevented from evaporating from the engaging portion. A form in which the ink supply member 911 supports the flow path forming member 907 and the tank holder 906 is referred to as an ink supply unit. The ink supply unit and the recording element substrate are joined together by pushing the pressure member into the pressure member screwed portion 916 in the ink supply member through the joint seal 908. FIG. 10 shows the configuration, 1001 is a recording element unit, 1002 is an ink supply unit, 1003 is a pressure member screwed portion, 1004 is a pressure member, 1005 is a joint seal, and 1006 is a first plate. , 1007 is a pressure member fixing portion on which the pressure member 1004 on the first plate is applied.

  In recent years, an inkjet recording apparatus is required to record an image with a high-definition image quality equivalent to that of a silver halide photograph at high speed in order to output, for example, an image taken with a digital camera.

  Japanese Laid-Open Patent Publication No. 2002-19119 forms an image in which fine pixels are formed at high density in the above-described atmospheric communication type recording liquid droplet discharge method by reducing the liquid droplets to be discharged and arranging the discharge ports at high density. It is relatively easy to perform, and the head can be made compact while obtaining excellent high-speed response and ejection performance, and is suitable for supplying an inexpensive head.

  However, an easy and reliable method for recording at higher speed is a method of increasing the number of scans by increasing the number of nozzles (the number of ejection ports) without changing the nozzle density. An easy and reliable method for forming a higher quality image is to increase the number of colors for forming a color image. In this method, in addition to the three primary colors Y, M, and C, special colors such as light Y, light M, and light C are provided.

  However, if these easy methods are adopted, the recording element substrate is inevitably enlarged, and the first plate for bonding and fixing it also becomes larger, resulting in an increase in the recording element unit. When the recording element unit becomes large, a large pressure (torque) for joining the ink supply unit is required. In the form of FIG. 8, a screw is used as a pressure member, but a large pressure (torque) is required and there is a limit to the pressure even if the screw is screwed in excessively. In the worst case, the pressure member fixing part is broken. I will let you.

  Although there is a method of increasing the surface of the pressure member to which the torque is applied, as can be seen from FIG. 10, this increases the area of the pressure member fixing portion and further increases the size of the recording element unit.

  Although there is a method using an adhesive without using a pressure member (Japanese Patent Laid-Open No. 2001-336769), it is not an optimal method from the viewpoint of joining strength and ease of joining, and is disadvantageous in terms of cost. .

  Further, in a head of the type as disclosed in JP-A-2002-19119, in addition to the above-described problem of insufficient bonding force, a minute ink mist generated when ink is ejected adheres to and corrodes the pressure member. There is also a problem that the result-defined pressure is lost. Even when the scale is not corroded, the cleaning process is disadvantageous in terms of recycling when the pressure member to which the ink mist is adhered is reused. For this, there is a method of attaching a corrosion prevention film (such as an oxide film) to the pressure member so as not to corrode, but this also increases the cost. In the future, this corrosion problem cannot be avoided even when using a higher-performance ink.

  The present invention has been made in view of the above problems, and an object of the present invention is to show a configuration of an ink jet recording head that is easy to stably join a large recording element unit to an ink supply unit. The other is to show a configuration that prevents the member that press-bonds the recording element unit and the ink supply unit from being corroded by the ink mist. Another object of the present invention is to provide an ink jet recording head that can print high-quality images at high speed and is inexpensive and excellent in recyclability.

Another aspect of the present invention for achieving the object is an ink jet recording in which a first plate, a second plate, and an electric wiring tape, which are bonded to a recording element substrate, are sequentially bonded to an ink supply unit. In the head
The first plate is pressure-bonded to the ink supply unit with a screw passing through a through hole of a counterbore included in the first plate, and the screw is covered with the electrical wiring tape. It is characterized by.

The present invention has an effect of enlarging the screw without worrying about an increase in the size of the recording element unit by covering the screw with the electric wiring tape. Further, since the torque can place the fixing portion of the screw in the position according to efficiently allows joining of more efficient and reliable recording element unit and Lee ink supply unit. Then, there is also an effect that the upper gel yield the bonding process between the recording element unit and Lee ink supply unit. As a result, it is possible to provide an inexpensive and reliable head.

Further ink jet recording head of the present invention, there is no corrosion of the screw due to the ink mist adhering to the screw, there is also an effect that spread the selectivity of the ink. As a result, a high-definition image can be formed . As a result, it becomes possible to provide the high-quality ink jet recording head.

The ink jet recording head of the present invention in further, since the ink mist to the screw does not adhere, there is also an effect of facilitating decomposition reuse of the pressure member. As a result, an ink jet recording head excellent in recyclability can be provided.

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

(First embodiment)
FIG. 1 is a perspective view showing a form in which a pressure member is covered with a single wiring tape while pressing a first plate, and is a view showing a first embodiment of the present invention. When a recording element substrate or the like is provided in the form of FIG. 1 as in the conventional case, a recording element unit is obtained. In FIG. 1, 101 is a first plate, 102 is a second plate, 103 is an electric wiring tape which is a single wiring tape, 104 is a pressure member fixing portion which is a part of the first plate 101, 105 Is a pressure member, and 106 is a head of the pressure member. The pressure member is inserted into a pressure member screwed portion (described in FIG. 2) of the ink supply unit, and torque is applied to the pressure member fixing portion 104 to join the recording element unit to the ink supply unit.

  FIG. 2 is a cross-sectional view of the embodiment of FIG. 1 with the pressure member cut along the XZ plane, and the relationship of the components of FIG. 1 will be described here. In FIG. 2, 201 is a first plate, 202 is a second plate, 203 is an electric wiring tape, 204 is a pressure member, 205 is a pressure member screwed portion, and 206 is a head of the pressure member. . The head 206 of the pressure member is covered with the electric wiring tape 203.

In this embodiment, the size of the recording element unit is 54 mm × 44 mm ((x direction) × (y direction) in FIG. 1), and a screw having a diameter of 2 mm is used as the pressing member 204, and the first plate 101 (already a first recording element substrate and the second recording element board those joining the second plate 102 to the bonded) to the first plate 101, engages under pressure in the pressure member 105 to the ink supply unit, The electric wiring tape 103 was affixed thereon (on the second plate 102), and the head 106 of the pressure member was covered with the electric wiring tape 103 to form an ink jet recording head.

  The ink jet recording head had a sufficient bonding force between the recording element unit and the ink supply unit, and there was no problem when printing was actually performed, and there was almost no ink mist adhering to the screw portion. Also, since there was no rusting and no ink solid matter adhered, it was easy to disassemble the screw for reuse, and very small ink deposits on the screw part could be easily cleaned.

(Second embodiment)
FIG. 3 is a cross-sectional view of the recording element unit according to the second embodiment of the present invention, in which the pressure member is cut along the XZ plane in the same manner as in FIG. In FIG. 3, 301 is a first plate, 302 is a second plate, 303 is an electric wiring tape, 304 is a pressure member, 305 is a pressure member screwed portion, and 306 is a head of the pressure member. . In the first embodiment, the head portion 206 of the pressure member is covered with the electric wiring tape 203. In this embodiment, the head portion 306 of the pressure member is covered with the second plate 302, and the upper portion 306 is covered therewith. An electric wiring tape 303 is provided.

In this embodiment, the size of the recording element unit is 54 mm × 44 mm ((x direction) × (y direction) in FIG. 1), and a screw having a diameter of 2 mm is used as the pressing member 304, and the first plate 301 (already a first recording element substrate and the second recording element board to the bonded) to the first plate 301, and pressure bonded at a pressure member 304 in the ink supply unit. Then, the second plate 302 was attached so as to cover the head portion 306 of the pressure member. On top of that (on the second plate), the electrical wiring tape 303 was joined to form an ink jet recording head, and the joining force between the recording element unit and the ink supply unit was sufficient.

  When the ink jet recording head actually printed, there was no problem, and there was almost no ink mist adhesion on the screw portion. Also, since there was no rusting and no ink solid matter adhered, it was easy to disassemble the screw for reuse, and very small ink deposits on the screw part could be easily cleaned.

  In the first embodiment, there is a merit that the degree of freedom of the height (Z direction in FIG. 2) of the pressure member 204 can be made larger than that in the second embodiment. In addition, the first plate 201 is bonded to the ink supply unit, and then the second plate 202 is bonded to the first plate 201. In addition, the first plate 201 on which the second plate is bonded in advance is used as the ink. There was also the merit of being able to choose two types of assembly processes, the method of joining to the supply unit. However, there is a problem with the strength of the electric wiring tape 203 in a portion where the thin electric wiring tape 203 is floated in the space above the pressure member 204. If any force is applied, the electric wiring tape 203 is damaged or There was also a risk that the electric wiring tape 203 peeled off from that portion.

  In the second embodiment, only the method of joining the first plate 301 to the ink supply unit and then joining the second plate 302 to the first plate 301 can be selected. (If the first plate 301 to which the second plate 302 is bonded in advance is bonded to the ink supply unit, the screw as the pressure member 304 cannot be tightened.) However, the thin electric wiring tape 303 Since the second plate 302 is supported by the second plate 302, there is no problem in strength, and the danger that the electric wiring tape 303 is peeled is eliminated.

(Third embodiment)
FIG. 4 shows the first embodiment (form in which the head of the pressure member is covered with the electric wiring tape), in which the gap between the pressure member and the electric wiring tape is filled with a sealing agent. FIG. 6 is a cross-sectional view of a recording element unit showing a fourth embodiment, in which a pressure member is cut along the XZ plane in the same manner as in FIG. 2. In FIG. 4, 401 is a first plate, 402 is a second plate, 403 is an electrical wiring tape, 404 is a pressure member, 405 is a pressure member screwed portion, and 406 is a sealant.

In this example, the size of the recording element unit was 54 mm × 44 mm ((x direction) × (y direction) in FIG. 1), and a screw with a diameter of 2 mm was used as the pressure member 404. Those (already the first recording element substrate and the second recording element board to the bonded to the first plate 401) the first plate 401 is joined to second plate 402, the pressure member in the ink supply unit Pressure bonding is performed at 404, and an electric wiring tape 403 is attached thereon (on the second plate 402). A gap between the electric wiring tape 403 and the pressure member 404 is filled with a sealant 406, and an ink jet recording head is formed. As a result, the bonding force between the recording element unit and the ink supply unit was sufficient.

  When the ink jet recording head actually printed, there was no problem and no ink mist was attached to the screw portion.

  In this embodiment, the gap between the thin electric wiring tape 403 and the pressure member 404 is filled with the sealing agent 406, and the electric wiring tape 403 is also joined to the first plate 401 via the sealing agent 406. The strength of the wiring tape 403 is maintained. Further, since the pressure member 404 is covered with the sealant 406, the ink pressure member never reaches the 404. Further, like the first embodiment, there is an advantage that two kinds of assembly processes can be selected. Moreover, as with the first embodiment, the degree of freedom in the height of the pressure member 404 can be secured. However, the step of injecting the sealing agent has increased, and a step of dropping (dissolving) the sealing agent during decomposition has also occurred.

(Fourth embodiment)
FIG. 5 is a perspective view showing a form in which the pressure member penetrates the second plate and is covered with a single wiring tape while pressing the first plate, and shows a fourth embodiment of the present invention. FIG. In FIG. 5, 501 is a first plate, 502 is a second plate, 503 is an electric wiring tape that is a single wiring tape, 504 is a part of the first plate 501, a pressure member fixing portion, 505 is a pressure member, and 506 is a head of the pressure member. The first plate 501 has an opening shape, and the shape is a through hole having a diameter of 3 mm. There are two places where the periphery is 5mm in diameter and 2mm deep (Z direction in Fig. 5). The through hole with counterbore becomes the pressure member fixing portion 504. The second plate 502 also has a through hole having a diameter of 5 mm, which is an opening shape, and corresponds to the pressing member fixing portion 504 and a counterbore hole.

  FIG. 6 is a cross-sectional view of the embodiment of FIG. 5 with the pressure member cut along the XZ plane. In FIG. 6, 601 is a first plate, 602 is a second plate, 603 is an electric wiring tape, 604 is a pressure member, and 605 is a pressure member screwed portion. The head 608 of the pressure member is covered with an electric wiring tape 603. Reference numeral 606 denotes the diameter of the through hole of the through hole that is the opening, and reference numeral 607 denotes the diameter of the counterbore around the through hole.

  In this example, the size of the recording element unit was 54 mm × 44 mm ((x direction) × (y direction) in FIG. 5), and a screw with a diameter of 2 mm was used as the pressure member 604. The pressure member 604 was passed through the opening shape of the first plate 601 and joined to the ink supply unit. Then, the second plate 602 was pasted on the first plate 601 with the through hole having a diameter of 5 mm, which is an opening shape on the second plate 602, and the counterbore on the first plate 601 corresponding to each other. . Then, an electric wiring tape 603 is pasted on the top (on the second plate 602) so as to cover the head 608 of the pressure member to form an ink jet recording head. As a result, the bonding force between the recording element unit and the ink supply unit is obtained. Was enough.

  When the ink jet recording head actually printed, there was no problem and no ink mist was attached to the screw portion.

  In this embodiment, the first plate 601 is provided with a through hole, and the second plate 602 is also provided with a through hole. In this embodiment, the place to be pressurized is on the upper surface of the first plate (the surface visible when viewed from the Z direction in FIG. 5). Can be set freely in the range. Therefore, it was possible to pressurize more efficiently.

  Further, since the electric wiring tape is joined in the form of a lid on the opening shape, ink does not adhere to the pressure member. Furthermore, even if the size of the pressure member (screw diameter) was considerably increased, there was no peeling of the electric wiring tape that was worried in the first embodiment. This means that a pressure member having a larger diameter can be used, which is effective when joining a larger recording element unit.

(Fifth embodiment)
FIG. 7 is a cross-sectional view of the recording element unit according to the fifth embodiment of the present invention, cut along the XZ plane passing through the pressure member in the same manner as in FIG. In FIG. 3, 701 is a first plate, 702 is a second plate, 703 is an electric wiring tape, 704 is a pressure member, 705 is a pressure member screwed portion, and 706 is a through hole which is an opening portion. The diameter of the through hole, 707 is the diameter of the counterbore around the through hole. Reference numeral 708 denotes a head of the pressure member.

  The first plate 701 has an opening shape, which is a through hole having a diameter of 4 mm. There are two places where the periphery is countersunk with a diameter of 5 mm and a depth of 2 mm (Z direction in FIG. 5). And the counterbore through hole becomes the pressure member fixing portion.

  In this embodiment, the size of the recording element unit is 54 mm × 44 mm ((x direction) × (y direction) in FIG. 5), a screw having a diameter of 3 mm is used as the pressure member 704, and the opening of the first plate 701 is opened. The pressure member 704 was joined to the ink supply unit through the shape. Then, the second plate 702 is attached so as to cover the head portion 708 of the pressure member, and the electric wiring tape 703 is joined on the second plate 702 (on the second plate 702) to form an ink jet recording head. The joining force with the ink supply unit was sufficient. When the ink jet recording head actually printed, there was no problem and no ink mist was attached to the screw portion.

  In the fourth embodiment, as described in the second example, an assembly process cannot be selected. However, there is an advantage that the diameter of the pressure member can be increased without considering the strength of the electric wiring tape.

(Sixth embodiment)
In the fourth embodiment, in order to further increase the diameter of the pressure member, the form of FIG. 8 is desirable. FIG. 8 is a cross-sectional view of the recording element unit according to the sixth embodiment of the present invention, cut along the XZ plane passing through the pressure member in the same manner as in FIG. In FIG. 8, 801 is a first plate, 802 is a second plate, 803 is an electric wiring tape, 804 is a pressure member, 805 is a pressure member screwed portion, 806 is a sealant, 807 is It is the diameter of the through hole of the through hole that is the opening, and the diameter of the counterbore around the 808 through hole.

  The first plate 801 has an opening shape, and the shape is a through hole having a diameter of 5 mm. There are two places where the periphery is 6mm in diameter and 2mm deep (Z direction in FIG. 5). And the counterbore through hole becomes the pressure member fixing portion. The second plate 802 also has a through-hole having a diameter of 6 mm, which is an opening shape, and corresponds to a counterbore on the first plate 801.

  In this embodiment, the size of the recording element unit is 54 mm × 44 mm ((x direction) × (y direction) in FIG. 5), a screw having a diameter of 4 mm is used as the pressure member 804, and the opening of the first plate 801 is opened. The pressure member 804 was joined to the ink supply unit through the shape. Then, the second plate 802 was attached to the first plate 801 so as to correspond to the through hole having a diameter of 6 mm, which is an opening shape on the second plate 802, and the counterbore on the first plate 801. Then, the sealant 806 is filled on the pressure member 804, and the electric wiring tape 803 is joined on the pressure member 804 (on the second plate 802) to perform an ink jet recording head. As a result, the recording element unit, the ink supply unit, The joining force of was sufficient. When the ink jet recording head actually printed, there was no problem and no ink mist was attached to the screw portion.

  By filling the gap between the electric wiring tape 803 and the pressure member 804 with the sealant 806, it becomes easy to maintain the strength of the electric wiring tape 803 (with respect to the force from the Z direction in FIG. 8). It became possible to use a larger pressure member.

The perspective view which shows the form with which the pressurization member is covered with the single wiring tape, pressing the 1st plate. Sectional drawing which cut | disconnected the recording element unit of 1st embodiment in the form which passes along a pressurizing member by XZ surface. Sectional drawing which cut | disconnected the recording element unit of 2nd embodiment in the form which passes along a pressurizing member by XZ surface. Sectional drawing which cut | disconnected the recording element unit of 3rd embodiment in the form which passes along a pressurizing member by XZ surface. The perspective view which shows the form with which the pressurization member is covered with the single wiring tape, penetrating the 2nd plate and pressing the 1st plate. Sectional drawing which cut | disconnected the recording element unit of 4th embodiment in the form which passes along a pressurizing member by XZ surface. Sectional drawing which cut | disconnected the recording element unit of 5th embodiment in the form which passes along a pressurizing member by XZ surface. Sectional drawing which cut | disconnected the recording element unit of 6th Embodiment in the form which passes along a pressurizing member by XZ surface. The exploded perspective view which looked at the conventional ink-jet recording head from the slanting lower part. FIG. 3 is an exploded perspective view showing a joining relationship between an ink supply unit and a recording element unit.

Explanation of symbols

DESCRIPTION OF SYMBOLS 101 1st plate 102 2nd plate 103 Electric wiring tape 104 Pressure member fixing | fixed part 105 Pressure member 106 Head part of a pressure member 201 First plate 202 Second plate 203 Electric wiring tape 204 Pressure member 205 Pressure member screwing portion 206 Pressure member head 301 First plate 302 Second plate 303 Electrical wiring tape 304 Pressure member 305 Pressure member screwing portion 306 Pressure member head 401 First plate 402 First Second plate 403 Electric wiring tape 404 Pressure member 405 Pressure member screwed-in portion 406 Sealant 501 First plate 502 Second plate 503 Electric wiring tape 504 Pressure member fixing portion 505 Pressure member 506 Pressure member 506 Head 601 First plate 602 Second plate 603 Electric Wiring tape 604 Pressure member 605 Pressure member screw-in part 606 Diameter of through hole 607 Counterbore diameter 608 Head of pressure member 701 First plate 702 Second plate 703 Electric wiring tape 704 Pressure member 705 Addition Pressure member screwed portion 706 Through hole diameter 707 Counterbore diameter 708 Pressure member head 801 First plate 802 Second plate 803 Electrical wiring tape 804 Pressure member 805 Pressure member screwed portion 806 Sealant 807 Diameter of through hole 808 Diameter of counterbore 901 First recording element substrate 902 Second recording element substrate 903 First plate 904 Electrical wiring tape 905 Second plate 906 Tank holder 907 Flow path forming member 908 Joint seal 909 Filter 910 Seal rubber 911 Ink Supply member 912 Ejection port 913 Ink supply port 914 External signal input terminal 915 Ink flow path 916 Pressure member screwed-in portion 1001 Recording element unit 1002 Ink supply unit 1003 Pressure member screwed-in portion 1004 Pressure member 1005 Joint seal 1006 First seal Plate 1007 Pressure member fixing part

Claims (4)

  In the ink jet recording head in which the first plate, the second plate, and the electric wiring tape, which are joined to the ink supply unit, are joined in order. An ink jet recording head, wherein the ink supply unit is pressure-bonded to the ink supply unit by a screw passing through a through hole of a counterbore provided in one plate, and the screw is covered with the electric wiring tape. .   2. The ink jet recording head according to claim 1, wherein the second plate has a through hole corresponding to the counterbore of the through hole with the counterbore.   The inkjet recording head according to claim 1, wherein the screw is covered with the second plate together with the electric wiring tape.   The inkjet recording head according to claim 1, wherein a sealing agent is injected into a gap between the screw and the electric wiring tape.

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