Liquid ejection head

Abstract

To prevent a wiring member from being peeled from an actuator member, and to prevent wiring from being peeled from a base material.SOLUTION: The side COF14, which is a wire member, includes a base 141, a plurality of wires 142 disposed on the base 141, and a plurality of contacts 149. The side COF14 includes a connection portion 14X having the contacts 149, and a draw-out portion 14X drawn out from one end side 14X1 and the other end side 14X2 of the connection portion 14Y in the front-rear direction. The connection portion 14X includes a wire region A in which the wires 142 are arrayed and a connection point region B in which the connection points 149 are disposed. The wire area A includes outer edge portions 14X and 14X1 extending in the left-right direction along one end 14X2 and the other end A1 of the connection portion A2 in the front-rear direction, and a sandwiching portion A3 sandwiching the connection area B in the left-right direction. A fixing member 21 for fixing the connecting part A1 and the actuating member to each other is arranged at a position close to the outer edge parts A2, 14X at the front and rear ends in the contacting area B.SELECTED DRAWING: Figure 6

Description

[Technical Field]

[0001] The present invention relates to a liquid ejection head that ejects liquid from a nozzle. [Background technology]

[0002] Patent Document 1 discloses a droplet ejection head (liquid ejection head) including a flow path laminate (flow path member) having flow paths including a plurality of nozzles, a piezoelectric element (actuator member) for ejecting liquid from the nozzles, and an FPC (wiring member) arranged on the upper surface of the piezoelectric element. The FPC is arranged on the surface of a resin substrate such as polyimide, and has a conductive pattern (wiring) drawn out to the input side of the drive signal, and electrode bumps (second contacts) that electrically connect individual electrodes (first contacts) of the piezoelectric element to the conductive pattern. The FPC also has a predetermined region (connection portion) where the electrode bumps are arranged, and an input side region (drawing portion) that is closer to the input side of the drive signal than the predetermined region. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2007-237556 Summary of the Invention [Problem to be solved by the invention]

[0004] An external force acting on the input side region (draw-out portion) of the FPC may act on a predetermined region (connection portion) of the FPC, causing the predetermined region to peel off from the piezoelectric element. Patent Document 1 proposes arranging a fixing member to fix the FPC and the diaphragm on the outer edge of the predetermined region (connection portion) to prevent this peeling. However, in this case, the difference in thermal expansion between the conductive pattern (wiring) arranged on the outer edge and the fixing member may cause the conductive pattern (wiring) to peel off from the resin substrate (base material).

[0005] SUMMARY OF THE INVENTION An object of the present invention is to provide a liquid ejection head that can prevent the wiring member from peeling off from the actuator member, and can also prevent the wiring from peeling off from the substrate. [Means for solving the problem]

[0006] A liquid ejection head according to the present invention comprises: a flow path member having a flow path including a plurality of nozzles; an actuator member for ejecting liquid from the plurality of nozzles, the actuator member being arranged on an upper surface of the flow path member and having an upper surface on which a plurality of first contacts corresponding to the plurality of nozzles are arranged; and a wiring member including: a connection portion arranged on the upper surface of the actuator member and having a plurality of second contacts connected to each of the plurality of first contacts; and a lead-out portion drawn out from an end of the connection portion in a first direction perpendicular to a vertical direction, the wiring member comprising: a base material provided across the connection portion and the lead-out portion; and a plurality of wirings arranged in the connection portion and connected to each of the plurality of second contacts at the connection portion, the connection portion having a wiring region in which the plurality of wirings are aligned in a second direction that intersects both the first direction and the vertical direction, and a contact region in an area other than the wiring region in which the plurality of second contacts are arranged, the wiring region including an outer edge portion extending in the second direction along the end of the connection portion, and a clamping portion that clamps the contact region in the second direction, and further comprising a first fixing member arranged at an end of the contact region in the first direction and close to the outer edge portion, for fixing the connection portion and the actuator member to each other. [Effects of the Invention]

[0007] According to the present invention, the first fixing member can prevent the wiring member from peeling off from the actuator member. Moreover, since the first fixing member is not disposed on the outer edge of the wiring region, it is also possible to prevent the wiring from peeling off from the substrate due to a difference in thermal expansion between the wiring disposed on the outer edge and the first fixing member. [Brief explanation of the drawings]

[0008] [Figure 1] 1 is a plan view of a printer 100 equipped with a head 10 according to an embodiment of the present invention. [Figure 2] FIG. 2 is a cross-sectional view of the head 10. [Figure 3] FIG. 2 is a perspective view of the head 10. [Figure 4] FIG. 2 is a plan view of the head 10. [Figure 5] 5 is a cross-sectional view of the head 10 taken along line VV in FIG. 4. [Figure 6] 1 is a development view of a COF 14 included in the head 10 as viewed from the bottom side. [Figure 7] FIG. 7 is an enlarged view of region VII shown in FIG. DETAILED DESCRIPTION OF THE INVENTION

[0009] <Embodiment> 1 includes a head 10, which is one embodiment of a "liquid ejection head" according to the present invention. In the following description, the up-down direction is defined based on the state in which the printer 100 is installed for use, the front-rear direction is defined with the downstream side in the transport direction of the paper 9 as the front, and the left-right direction is defined when viewed from the front of the printer 100.

[0010] The printer 100 includes a head 10, a carriage 11 that holds the head 10, a scanning mechanism 30 that moves the carriage 11 and the head 10 left and right, a platen 40 that supports the paper 9 from below, a transport mechanism 50 that transports the paper 9 forward, and a control device 90.

[0011] The scanning mechanism 30 includes a pair of guides 31 and 32 that support the carriage 11, and a belt 33 connected to the carriage 11. The guides 31 and 32 and the belt 33 extend in the left-right direction. When the carriage motor is driven under the control of the control device 90, the belt 33 runs, and the carriage 11 and head 10 move left-right along the guides 31 and 32.

[0012] The platen 40 is disposed below the carriage 11 and the head 10. The paper 9 is supported on the upper surface of the platen 40.

[0013] The transport mechanism 50 has a roller 51 arranged behind the head 10 and a roller 52 arranged in front of the head 10. The head 10, the carriage 11, and the platen 40 are arranged between the roller 51 and the roller 52 in the front-to-rear direction.

[0014] Each of rollers 51 and 52 is made up of a set of rotating members. The set of rotating members includes an upper rotating member arranged above the transport path of paper 9 and a lower rotating member arranged below the transport path of paper 9. The upper rotating member and the lower rotating member are arranged so that their peripheral surfaces are in contact with each other.

[0015] When the conveying motor is driven under the control of the control device 90, the rotating members of the rollers 51 and 52 rotate. As the rotating members of the rollers 51 and 52 rotate while nipping the paper 9, the paper 9 is conveyed forward.

[0016] As shown in FIG. 2, the head 10 includes a flow path member 12 and an actuator member 13.

[0017] A plurality of nozzles 123 open on the lower surface of the flow path member 12. A common flow path 121 communicating with an ink tank and individual flow paths 122 each for each nozzle 123 are formed inside the flow path member 12. The individual flow paths 122 are flow paths that run from the outlet of the common flow path 121 through the pressure chambers 12P to the nozzles 123. A plurality of pressure chambers 12P open on the upper surface 12X of the flow path member 12. The common flow path 121 and the individual flow paths 122 correspond to the "flow paths" of the present invention.

[0018] The actuator member 13 is disposed on the upper surface 12X of the flow path member 12. The actuator member 13 includes a metallic vibration plate 131 disposed on the upper surface 12X of the flow path member 12 so as to cover the plurality of pressure chambers 12P, a piezoelectric layer 132 disposed on the upper surface of the vibration plate 131, and a plurality of individual electrodes 133 disposed on the upper surface of the piezoelectric layer 132 so as to face each of the plurality of pressure chambers 12P.

[0019] The diaphragm 131 and the individual electrodes 133 are electrically connected to the driver ICs 15A and 15B via the COF 14. The driver ICs 15A and 15B are electrically connected to the control device 90. The COF 14 corresponds to the "wiring member" of the present invention.

[0020] On the upper surface 13X of the actuator member 13, there are arranged contacts that are arranged on the upper surface of the piezoelectric layer 132 and electrically connected to the vibration plate 131, and contacts 139 that are arranged on the upper surfaces of the individual electrodes 133. The COF 14 has contacts 149 that are electrically connected to the contacts arranged on the upper surface 13X, and wiring 142 that electrically connects the contacts 149 and the driver ICs 15A and 15B. The contacts 139 correspond to the "first contacts" of the present invention. The contacts 149 correspond to the "second contacts" of the present invention.

[0021] Under the control of the control device 90, the driver ICs 15A and 15B maintain the potential of the diaphragm 131 at ground potential while changing the potential of the individual electrode 133. As a result, the potential of the individual electrode 133 changes between a predetermined drive potential and ground potential. At this time, the actuator 130, which is the portion of the diaphragm 131 and the piezoelectric layer 132 sandwiched between each individual electrode 133 and each pressure chamber 12P, deforms, changing the volume of the pressure chamber 12P. Pressure is applied to the ink in the pressure chamber 12P, causing ink to be ejected from the nozzle 123.

[0022] 5, the COF 14 includes a connection portion 14X disposed on the upper surface 13X of the actuator member 13, and two drawn-out portions 14Y drawn out from one end 14X1 and the other end 14X2 in the front-rear direction of the connection portion 14X and folded back upward. The front-rear direction corresponds to the "first direction" in the present invention. The one end 14X1 and the other end 14X2 correspond to the "ends of the connection portion in the first direction" in the present invention.

[0023] The connection portion 14X extends in the front-rear and left-right directions in parallel with the upper surface 13X. A plurality of contacts 149 (see FIG. 2) are arranged on the lower surface of the connection portion 14X.

[0024] Each of the two drawer portions 14Y includes a vertical portion extending upward from one end 14X1 or the other end 14X2 of the connection portion 14X, and a horizontal portion extending rearward or forward from the upper end of the vertical portion toward the center in the front-to-rear direction of the head 10. Of the two drawer portions 14Y, a driver IC 15A is disposed on the upper surface of the horizontal portion of the front drawer portion 14Y, and a driver IC 15B is disposed on the upper surface of the horizontal portion of the rear drawer portion 14Y.

[0025] A frame 19 is disposed around the actuator member 13 on the upper surface 12X of the flow path member 12. The frame 19 is a rectangular frame-shaped member disposed along the periphery of the upper surface 12X. As shown in FIG. 3, four openings 191 are provided on each of the front and rear edges of the frame 19. Each opening 191 communicates with a common flow path 121 of the flow path member 12 and also communicates with an ink tank via a tube. For example, ink in an ink tank flows into the common flow path 121 via the tube and the four front openings 191, and returns to the ink tank via the four rear openings 191 and the tube.

[0026] As shown in Fig. 5, the actuator member 13 and the COF 14 are disposed within the frame 19. The pressing member 18, the support member 16, and the circuit board 17 are disposed in the space surrounded by the connection portion 14X and the two drawer portions 14Y of the COF 14. The pressing member 18, the support member 16, and the circuit board 17 are disposed above the connection portion 14X. The vertical portion of the drawer portion 14Y is disposed along the side surface of the pressing member 18.

[0027] 3 and 4, the flow path member 12 and the frame 19 are rectangular in shape with their long sides in the front-rear direction in a plane perpendicular to the up-down direction. The actuator member 13, the pressing member 18, and the support member 16 are also rectangular in shape with their long sides in the front-rear direction in a plane perpendicular to the up-down direction.

[0028] 5, the lower surface of the pressing member 18 is disposed with a gap between an area 13R on the upper surface 13X of the actuator member 13, where a plurality of individual electrodes 133 (see FIG. 2) are arranged, and a connection portion 14X connected to the area 13R. The peripheral edge of the lower surface of the pressing member 18 comes into contact with the connection portion 14X and presses the connection portion 14X downward toward the actuator member 13.

[0029] As shown in FIG. 5, the support member 16 is supported from below by a pressing member 18, and supports three circuit boards 17 on the lower surface.

[0030] The circuit board 17 is disposed in a recess provided on the upper surface of the pressing member 18 and is electrically connected to the COF 14.

[0031] A sealant 20 is disposed along the inner peripheral edge of the frame 19. The sealant 20 is disposed along the peripheral edge of the connection portion 14X, extending in the left-right direction along one end 14X1 and the other end 14X2 in the front-rear direction of the connection portion 14X, and also extending in the front-rear direction along one end 14X3 and the other end 14X4 in the left-rear direction of the connection portion 14X. The sealant 20 isolates the space between the connection portion 14X and the actuator member 13 from the external space. This prevents ion migration between the individual electrodes 133 caused by moisture in the air entering the space. The sealant 20 may be made of a non-conductive material such as fluororesin.

[0032] 6, the COF 14 has a rectangular substrate 141 that defines the outer shape of the COF 14, in addition to the contacts 149 and wiring 142 described above with reference to Fig. 2. The substrate 141 is provided across the connection portion 14X and the two lead-out portions 14Y. The substrate 141 may be made of a flexible and insulating material such as polyimide.

[0033] A plurality of wirings 142 and a plurality of contacts 149 are arranged on the base material 141. Each wiring 142 is arranged across the connection portion 14X and the two lead-out portions 14Y, and extends from one of the driver ICs 15A, 15B arranged in the lead-out portion 14Y to a corresponding contact 149 arranged in the connection portion 14X. One of the driver ICs 15A, 15B is arranged at the base end of each wiring 142, and a corresponding contact 149 is arranged at the tip of each wiring 142. The wirings 142 and the contacts 149 may be made of any conductive material.

[0034] 6, the COF 14 has, on a substrate 141, a wiring region A in which a plurality of wirings 142 are arranged, and a contact region B, which is an area other than the wiring region A and in which a plurality of contacts 149 are arranged. In the wiring region A, the plurality of wirings 142 are aligned in the left-right direction. The left-right direction corresponds to the "second direction" of the present invention.

[0035] The wiring region A is disposed across the connection portion 14X and the two lead-out portions 14Y, while the contact region B is disposed in the connection portion 14X and not in the lead-out portions 14Y.

[0036] The connection portion 14X has a wiring area A and a contact area B.

[0037] In the connection portion 14X, a total of 12 contact areas B are arranged at intervals in the left-right direction. Each contact area B extends in the front-rear direction and includes a tapered portion B1 provided at one end and the other end in the front-rear direction, and a main portion B2 at the other end. The tapered portion B1 has a tapered shape due to the arrangement of the wiring 142 around it, and its length in the left-right direction, i.e., its width, gradually decreases as it approaches one end or the other end in the front-rear direction. The main portion B2 has a substantially constant width. The contacts 149 are not arranged in the tapered portion B1, but in the main portion B2. In the main portion B2, multiple contacts 149 are arranged in two staggered rows along the front-rear direction.

[0038] The wiring area A provided in the connection portion 14X includes an outer edge portion A1 along one end 14X1 of the connection portion 14X, an outer edge portion A2 along the other end 14X2 of the connection portion 14X, and a plurality of clamping portions A3 that clamp the contact area B in the left-right direction.

[0039] The outer edge A1 extends in the left-right direction and is in contact with the tips of the tapered portions B1 at the rear of the contact areas B. The outer edge A2 extends in the left-right direction and is in contact with the tips of the tapered portions B1 at the front of the contact areas B.

[0040] The clamping portion A3 extends in the front-rear direction, similar to the contact area B. In the clamping portion A3, the portion adjacent to the tapered portion B1 of the contact area B in the left-right direction has a larger left-right length, i.e., a larger width, than the other portions.

[0041] As shown in FIGS. 6 and 7, fixing members 21 and 22 are disposed at one end and the other end in the front-rear direction of the contact area B, respectively.

[0042] The fixing member 21 corresponds to the "first fixing member" of the present invention, and is disposed at the front-rear end of the contact area B, in close proximity to the outer edges A1 and A2 of the wiring area A. The fixing member 21 is disposed at the tip of the tapered portion B1.

[0043] The fixed member 22 corresponds to the "second fixed member" of the present invention, and is disposed between the fixed member 21 and the plurality of contacts 149 in the front-rear direction.

[0044] 6 and 7, fixing member 21 has a circular shape in a direction perpendicular to the up-down direction, and fixing member 22 has a generally elliptical shape that is elongated in the left-right direction. In the direction perpendicular to the up-down direction, fixing member 21 is smaller in size than fixing member 22.

[0045] Specifically, fixing member 21 has a diameter that is approximately the same as the short axis of fixing member 22. The long axis of fixing member 22 has a length that is approximately the same as the width of that portion of contact area B. Therefore, fixing member 22 is close to clamping portion A3 of wiring area A at both left and right ends.

[0046] As shown in FIG. 6, the fixing members 21 and 22 are disposed at both ends of each contact area B in the front-rear direction.

[0047] The connecting portion 14X further has a cavity region C.

[0048] 6 and 7, the hollow region C is an area surrounded by the wiring region A in which neither the wiring 142 nor the contacts 149 are arranged. The hollow region C has a diamond shape that is long in the front-to-rear direction, in a direction perpendicular to the up-down direction. In the wiring region A, the spacing between the wiring 142 around the hollow region C is smaller than the spacing between the wiring 142 in other parts.

[0049] A plurality of hollow regions C are arranged in the left-right direction along the outer edges A1 and A2 of the wiring region A. One hollow region C is disposed between two fixing members 21 adjacent to each other in the left-right direction.

[0050] The hollow area C is disposed across the outer edges A1 and A2 and the front-rear end portions of each clamping portion A3. Approximately half of the hollow area C is surrounded by the outer edges A1 and A2.

[0051] A fixing member 23 is disposed in the hollow region C. The fixing member 23 corresponds to the "third fixing member" of the present invention, and like the hollow region C, has a diamond shape in the direction perpendicular to the up-down direction.

[0052] As shown in FIG. 6, the fixing members 23, like the fixing members 21 and 22, are disposed near one end 14X1 and the other end 14X2 of the connecting portion 14X.

[0053] The connection portion 14X further has a fixing member 24 arranged along one end 14X3 and the other end 14X4 in the left-right direction. The fixing member 24 is arranged outside the wiring area A of the connection portion 14X, in an area where neither the wiring 142 nor the contacts 149 are arranged. The fixing member 24 has a rectangular shape that is long in the front-rear direction. The length of the fixing member 24 in the front-rear direction is approximately the same as the length of the contact area B in the front-rear direction.

[0054] The fixing members 21 to 24 fix the connection portion 14X and the actuator member 13 to each other, and may be made of a thermosetting material such as epoxy resin. The fixing members 21 to 24 do not overlap either the wiring 142 or the contact 149.

[0055] 6, the twelve contact areas B are surrounded on all four sides by fixing members 21 to 24. Sets of fixing members 21, 22 and fixing member 23 are arranged alternately in the left-right direction and spaced apart from each other along one end 14X1 and the other end 14X2 in the front-rear direction of connecting portion 14X. Fixing member 24 is arranged extending in the front-rear direction along left-right direction 14X3 and the other end 14X4 of connecting portion 14X.

[0056] As described above, according to this embodiment, the fixing members 21 (see FIGS. 6 and 7) arranged at the ends of the contact areas B in the front-rear direction can prevent the COFs 14 from peeling off from the actuator member 13. Furthermore, since the fixing members 21 are not arranged at the outer edges A1 and A2 of the wiring area A, it is also possible to prevent the wiring 142 from peeling off from the substrate 141 due to the difference in thermal expansion between the fixing members 21 and the wiring 142 arranged at the outer edges A1 and A2.

[0057] The problem of the COF 14 peeling off from the actuator member 13 can be particularly pronounced when solvent-based ink is used as the liquid ejected from the nozzle 123. This is thought to be because the volatile components in the solvent contained in the solvent-based ink deteriorate the bonding strength of the contact point. However, according to this embodiment, by providing the fixing member 21 at the end of the contact area B in the front-rear direction, it is possible to effectively prevent the COF 14 from peeling off from the actuator member 13 even when solvent-based ink is used as the liquid ejected from the nozzle 123.

[0058] A fixing member 22 is further disposed between the fixing member 21 and the plurality of contacts 149 in the front-rear direction in the contact area B (see FIGS. 6 and 7). In this case, the two fixing members 21, 22 cooperate to more reliably prevent the COF 14 from peeling off from the actuator member 13.

[0059] The size of fixing member 21 in a direction perpendicular to the up-down direction is smaller than the size of fixing member 22 in a direction perpendicular to the up-down direction (see FIGS. 6 and 7). The ends of contact area B in the front-to-rear direction tend to be tapered due to the arrangement of wiring 142 around them. By arranging fixing member 21 with a small size in this portion, it is possible to prevent fixing member 21 from overlapping with wiring 142.

[0060] The connecting portion 14X further has a hollow region C, and the fixing member 23 is disposed in the hollow region C (see FIGS. 6 and 7). This makes it possible to more reliably prevent the COF 14 from peeling off from the actuator member 13.

[0061] The cavity region C is diamond-shaped in a direction perpendicular to the up-down direction (see FIGS. 6 and 7). It is known that diamond-shaped cavities can be formed by anisotropic etching, and according to this configuration, the diamond-shaped cavity region C can be easily formed by forming the wiring 142 on the base material 141 by anisotropic etching.

[0062] The fixing member 23 is rhombic in a direction perpendicular to the up-down direction (see FIGS. 6 and 7). By matching the shape of the fixing member 23 to the shape of the hollow region C, the fixing member 23 can be efficiently arranged within the hollow region C.

[0063] At least a portion of the cavity region C is surrounded by the outer edges A1 and A2 (see FIGS. 6 and 7). The spacing between the wirings 142 tends to be smaller in the clamping portion A3 than in the outer edges A1 and A2. Furthermore, since the spacing between the wirings 142 is smaller around the cavity region C than in other portions, if the entire cavity region C were surrounded by the clamping portion A3, the spacing between the wirings 142 around the cavity region C would become too small. In this regard, in the present configuration, since at least a portion of the cavity region C is surrounded by the outer edges A1 and A2, the spacing between the wirings 142 around the cavity region C does not become too small. Furthermore, the ends of the connection portion 14X, i.e., the vicinity of one end 14X1 and / or the other end 14X2, are reinforced not only by the fixing members 21 and 22 but also by the fixing member 23, thereby more reliably preventing the COF 14 from peeling off from the actuator member 13. Furthermore, if the sealing material 20 (see FIG. 5) that seals the space between the connection portion 14X and the actuator member 13 intrudes into the contact area B, deformation of the actuator 130 may be hindered. In this regard, according to this configuration, the fixing members 21 to 23 cooperate to prevent the sealing material 20 from intruding into the contact area B from the end of the connection portion 14X.

[0064] In the left-right direction, one hollow region C is disposed between two adjacent fixing members 21 (see FIGS. 6 and 7). In this case, the above-described reinforcing effect can be obtained in a balanced manner in the left-right direction, and peeling of the COF 14 from the actuator member 13 can be further prevented. In addition, the effect of preventing the intrusion of the sealing material 20 can be obtained in a balanced manner in the left-right direction, and the intrusion of the sealing material 20 into the contact region B can be more reliably prevented.

[0065] <Modification> Although the preferred embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and various design modifications are possible within the scope of the claims.

[0066] The entire hollow area C may be surrounded by the clamping portion A3.

[0067] The shape of the hollow region C and the fixing member 23 in the direction perpendicular to the up-down direction is not limited to a rhombus, and may be a circle or the like.

[0068] The hollow region C and the fixing member 23 may be omitted.

[0069] The size of fixing member 21 in a direction perpendicular to the up-down direction may be equal to or greater than the size of fixing member 22 in a direction perpendicular to the up-down direction.

[0070] The fixing member 22 may be omitted.

[0071] Although the pull-out portion 14Y is folded upward in the above-described embodiment, it is not limited to this. For example, the pull-out portion 14Y may extend horizontally from the end of the connecting portion 14X.

[0072] The flow path member is not limited to a serial type, but may be a line type.

[0073] The object onto which the liquid is ejected from the nozzles is not limited to paper, but may be, for example, cloth, a substrate, a plastic member, or the like.

[0074] The liquid ejected from the nozzles is not limited to ink, but may be any liquid (for example, a treatment liquid that aggregates or precipitates components in the ink, etc.).

[0075] The present invention is not limited to printers, but can also be applied to facsimiles, copiers, multifunction machines, etc. The present invention can also be applied to liquid ejection devices used for purposes other than image recording (for example, liquid ejection devices that eject conductive liquid onto a substrate to form a conductive pattern). [Explanation of symbols]

[0076] 10 head (liquid ejection head) 12 Flow path member 121 Common flow path (flow path) 122 Individual channel (channel) 123 nozzle 12X top 13 Actuator member 139 contact (first contact) 13X top 14 COF (wiring materials) 141 Base material 142 Wiring 149 contacts (second contacts) 14X Connection Part 14X1 One end (end) 14X2 other end (end) 14Y drawer part 21 Fixing member (first fixing member) 22 Fixing member (second fixing member) 23 Fixing member (third fixing member) A wiring area A1, A2 outer edge A3 clamping part B contact area C cavity area

Claims

1. a flow path member having a flow path including a plurality of nozzles; an actuator member for ejecting liquid from the plurality of nozzles, the actuator member being disposed on an upper surface of the flow path member and having an upper surface on which a plurality of first contacts corresponding to the plurality of nozzles are disposed; a wiring member including: a connection portion disposed on the upper surface of the actuator member and having a plurality of second contacts connected to the plurality of first contacts, respectively; and a lead-out portion led out from an end of the connection portion in a first direction perpendicular to the up-down direction, the wiring member includes a substrate provided across the connection portion and the lead-out portion, and a plurality of wires arranged on the substrate across the connection portion and the lead-out portion, the wires being connected to the plurality of second contacts at the connection portion, respectively; the connection portion has a wiring region in which the plurality of wirings are aligned in a second direction that intersects both the first direction and the vertical direction, and a contact region that is a region other than the wiring region and in which the plurality of second contacts are arranged, the wiring region includes an outer edge portion extending in the second direction along the end portion of the connection portion, and a clamping portion that clamps the contact region in the second direction, A liquid ejection head further comprising a first fixing member that fixes the connection portion and the actuator member to each other, the first fixing member being positioned at the end of the contact area in the first direction and in close proximity to the outer edge portion.

2. 2. The liquid ejection head according to claim 1, further comprising a second fixing member arranged between the first fixing member and the plurality of second contacts in the first direction in the contact area, for fixing the connection portion and the actuator member to each other.

3. The liquid ejection head according to claim 2 , wherein the size of the first fixing member in a direction perpendicular to the vertical direction is smaller than the size of the second fixing member in a direction perpendicular to the vertical direction.

4. the connection portion further includes a cavity region surrounded by the wiring region, in which neither the plurality of wirings nor the plurality of second contacts are arranged; 2. The liquid ejection head according to claim 1, further comprising a third fixing member disposed in the hollow region for fixing the connecting portion and the actuator member to each other.

5. 5. The liquid ejection head according to claim 4, wherein the hollow region is rhomboidal in a direction perpendicular to the vertical direction.

6. 6. The liquid ejection head according to claim 5, wherein the third fixing member is rhombic in a direction perpendicular to the up-down direction.

7. 5. The liquid ejection head according to claim 4, wherein at least a portion of the hollow region is surrounded by the outer edge portion.

8. 8. The liquid ejection head according to claim 4, wherein the hollow region is disposed between two of the first fixing members that are adjacent to each other in the second direction.

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