Liquid discharge head

Abstract

To prevent a wiring member from peeling off from an actuator member.SOLUTION: A head 10 comprises: a flow path member 12; an actuator member 13 arranged on an upper surface 12X of the flow path member 12; a COF 14 which includes a connection part 141 arranged on an upper surface 13X of the actuator member 13 and a folded-back part 142 folded back upward from an end portion of the connection part 141; and a plate spring 16 arranged above the connection part 141. The plate spring 16 has a first energizing part 161 energizing the connection part 141 toward the actuator member 13.SELECTED DRAWING: Figure 5

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 configuration in which a COF (wiring member) includes a connection portion disposed on the upper surface of an actuator (actuator member) and connected to a contact (first contact) on the upper surface of the actuator, and a folded portion folded upward from the upper surface of the actuator, a driving IC disposed on the upper surface of the folded portion, and a heat dissipation member disposed above the driving IC. The driving IC is biased toward the heat dissipation member by a biasing member. This ensures that heat generated by the driving IC is dissipated to the heat dissipation member. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2017-154473 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, the driving IC is biased toward the heat dissipation member in order to dissipate heat from the driving IC. However, in a configuration in which the wiring member includes a connection portion and a folded portion as described above, in addition to dissipating heat from the driving IC, the following problems may arise.

[0005] For example, if the folded portion sags, the radius of the boundary between the connection portion and the folded portion increases, applying a force to the connection portion near the boundary in a direction away from the actuator member, which may cause the second contact of the connection portion to peel off from the first contact of the actuator member. Furthermore, for example, if a sealant is placed along the edge of the connection portion to isolate the space between the connection portion and the actuator member from the outside, if the amount of sealant is uneven at one end of the connection portion, the cure shrinkage rate of the sealant will differ, applying a rotational moment to the wiring member. This may result in the connection portion being positioned at an angle to the top surface of the actuator member, causing the second contact of the connection portion to peel off from the first contact of the actuator member. This can lead to issues with the wiring member peeling off from the actuator member.

[0006] An object of the present invention is to provide a liquid ejection head in which the wiring member is less likely to separate from the actuator member. [Means for solving the problem]

[0007] The liquid ejection head according to the present invention is characterized by comprising: a flow path member having a liquid flow path including a nozzle; an actuator member for ejecting liquid from the nozzle, the actuator member being arranged on the upper surface of the flow path member and having an upper surface on which a first contact is arranged; a wiring member including a connection portion arranged on the upper surface of the actuator member and having a second contact connected to the first contact, and a folded portion folded upward from an end of the connection portion; and a biasing member arranged above the connection portion, the biasing member having a first biasing portion that biases the connection portion toward the actuator member. [Effects of the Invention]

[0008] According to the present invention, the first biasing portion of the biasing member biases the connection portion toward the actuator member, which makes it difficult for the wiring member to peel off from the actuator member. [Brief explanation of the drawings]

[0009] [Figure 1]1 is a plan view of a printer 100 according to an embodiment of the present invention. [Figure 2] 1 is a cross-sectional view of a head 10 included in a printer 100. FIG. [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] FIG. 6 is an enlarged view of region VI shown in FIG. 5. [Figure 7] FIG. 7 is a perspective view of the leaf spring 16 shown in FIGS. 3 to 6. DETAILED DESCRIPTION OF THE INVENTION

[0010] <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.

[0011] The printer 100 includes a head 10, a carriage 20 that holds the head 10, a scanning mechanism 30 that moves the carriage 20 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.

[0012] The scanning mechanism 30 includes a pair of guides 31 and 32 that support the carriage 20, and a belt 33 connected to the carriage 20. 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 20 and head 10 move left-right along the guides 31 and 32.

[0013] The platen 40 is disposed below the carriage 20 and the head 10. The paper 9 is supported on the upper surface of the platen 40.

[0014] 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 20, and the platen 40 are arranged between the roller 51 and the roller 52 in the front-to-rear direction.

[0015] 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.

[0016] 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.

[0017] As shown in FIG. 2, the head 10 includes a flow path member 12 and an actuator member 13.

[0018] 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 "liquid flow paths" of the present invention.

[0019] 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.

[0020] 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. The driver ICs 15A and 15B correspond to the "driving member" of the present invention.

[0021] 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 signal lines that electrically connect 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.

[0022] 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 electrodes 133. As a result, the potential of the individual electrodes 133 changes between a predetermined drive potential and ground potential. At this time, the actuators 130, which are portions of the diaphragm 131 and the piezoelectric layer 132 sandwiched between each individual electrode 133 and each pressure chamber 12P, deform, changing the volume of the pressure chambers 12P. Pressure is applied to the ink in the pressure chambers 12P, causing the ink to be ejected from the nozzles 123. The ink ejected from the nozzles 123 is ink that contains a volatile component, such as UV ink.

[0023] As shown in FIG. 5, the COF 14 includes a connection portion 141 disposed on the upper surface 13X of the actuator member 13, and two folded portions 142 folded upward from each end of the connection portion 141 in the front-rear direction.

[0024] The connection portion 141 extends in the front-rear and left-right directions in parallel with the upper surface 13X. A plurality of contact points 149 (see FIG. 2) are arranged on the lower surface of the connection portion 141.

[0025] Each of the two folded portions 142 includes a vertical portion extending upward from the end of the connecting portion 141 and a horizontal portion extending forward or backward from the upper end of the vertical portion toward the center in the front-to-rear direction of the head 10. Of the two folded portions 142, the driver IC 15A is disposed on the upper surface of the horizontal portion of the front folded portion 142, and the driver IC 15B is disposed on the upper surface of the horizontal portion of the rear folded portion 142.

[0026] 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.

[0027] 5, the actuator member 13 and the COF 14 are disposed within the frame 19. The pressing member 18 and the leaf spring 16 are disposed in the space surrounded by the connecting portion 141 and the two folded portions 142 of the COF 14. The leaf spring 16 corresponds to the "biasing member" of the present invention.

[0028] 3 and 4, the flow path member 12 and the frame 19 have a rectangular shape that is long in the front-rear direction in a plane perpendicular to the up-down direction. The actuator member 13 and the pressing member 18 also have a rectangular shape that is long in the front-rear direction in a plane perpendicular to the up-down direction.

[0029] As shown in FIG. 5, the pressing member 18 is disposed between the connection portion 141 and the leaf spring 16, above the connection portion 141 and below the leaf spring 16.

[0030] Adhesive tape 11 is arranged on the underside and side surfaces of pressing member 18. Adhesive tape 11 is arranged between pressing member 18 and COF 14, and fixes pressing member 18 and COF 14 to each other. Adhesive tape 11 is arranged over the outer periphery of connection portion 141 and folded-back portion 142 of COF 14. Adhesive tape 11 corresponds to the "adhesive member" of the present invention.

[0031] The volatile components in the ink react with the adhesive tape 11, reducing the viscosity of the adhesive tape 11.

[0032] The lower surface of the pressing member 18 has a recess 181 and an outer peripheral portion 182 surrounding the recess 181. The recess 181 overlaps in the vertical direction with a contact region 13R on the upper surface 13X of the actuator member 13. A plurality of contacts 139 (see FIG. 2) are arranged in the contact region 13R. The vertical direction corresponds to the "orthogonal direction" in the present invention.

[0033] On the lower surface of the pressing member 18 , the outer periphery 182 is in contact with the connecting portion 141 via the adhesive tape 11 , while the portion where the recess 181 is provided is spaced apart from the connecting portion 141 .

[0034] The upper surface of the pressing member 18 has two protrusions 183 (see FIGS. 3 and 4). The two protrusions 183 each protrude upward. The protrusions 183 protrude from the connecting portion 141 toward the leaf spring 16. The leaf spring 16 has two through holes 163 into which the two protrusions 183 are inserted in the up-down direction.

[0035] As shown in Fig. 5, the leaf spring 16 is disposed above the pressing member 18 and above the connection portion 141. The driver ICs 15A and 15B are disposed above the leaf spring 16, and the heat dissipation member 17 is disposed above the driver ICs 15A and 15B. The heat dissipation member 17 is disposed on the upper surfaces of the two driver ICs 15A and 15B. The heat dissipation member 17 is made of a material with high thermal conductivity, such as metal, and has the function of dissipating heat from the driver ICs 15A and 15B. A water-cooled or air-cooled cooling member may be in contact with the heat dissipation member 17.

[0036] As shown in FIG. 7, the leaf spring 16 has two first biasing portions 161, two second biasing portions 162A, and two second biasing portions 162B in addition to the two through holes 163 described above.

[0037] The two through holes 163 are aligned in the left-right direction at the center of the leaf spring 16 in the front-rear direction. The two through holes 163 are circular and have the same diameter. As shown in FIG. 3, the two protrusions 183 are cylindrical and have the same diameter. The diameter of the through hole 163 is larger than the diameter of the protrusions 183. The two through holes 163 are each larger in size than the two protrusions 183 in any direction perpendicular to the up-down direction.

[0038] 3, adhesive A is placed in the two through holes 163. The adhesive A closes the two through holes 163 into which the two protrusions 183 are respectively inserted, and bonds the leaf spring 16 and the pressing member 18 together. The adhesive A may be, for example, an ultraviolet-curing adhesive.

[0039] The leaf spring 16 is further fixed to the flow path member 12 and the frame 19 by inserting screws 193, as shown in FIGS. 3 and 4, into through holes provided at the four corners, as shown in FIG.

[0040] 7, the two first biasing portions 161 are aligned in the front-rear direction at the center in the left-right direction of the leaf spring 16. The two first biasing portions 161 are each made up of a spring piece extending forward and rearward from the center of the leaf spring 16.

[0041] 7, the two second biasing portions 162A are aligned in the left-right direction at the front end of the leaf spring 16. One of the two second biasing portions 162A is formed by a spring piece extending rightward from the left end of the leaf spring 16, and the other is formed by a spring piece extending leftward from the right end of the leaf spring 16.

[0042] 7, the two second urging portions 162B are aligned in the left-right direction at the rear end of the leaf spring 16. One of the two second urging portions 162B is formed by a spring piece extending rightward from the left end of the leaf spring 16, and the other is formed by a spring piece extending leftward from the right end of the leaf spring 16.

[0043] In the left-right direction, one first urging portion 161 is disposed between two second urging portions 162A, and one first urging portion 161 is disposed between two second urging portions 162B.

[0044] As shown in Figures 5 and 6, the two first biasing portions 161 contact the upper surface of the pressing member 18 and bias the pressing member 18 downward. One of the two first biasing portions 161 contacts a front portion of the upper surface of the pressing member 18, and the other contacts a rear portion of the upper surface of the pressing member 18. As described above, the pressing member 18 is long in the front-to-rear direction. The two first biasing portions 161 bias the peripheral portion of the connection portion 141 downward toward the actuator member 13 via the outer circumferential portion 182 of the pressing member 18.

[0045] 5 and 6, the two second biasing portions 162A bias the driver IC 15A upward toward the heat dissipation member 17 via the front folded portion 142. The two second biasing portions 162B bias the driver IC 15B upward toward the heat dissipation member 17 via the rear folded portion 142.

[0046] Two second urging portions 162A are arranged for one driver IC 15A, and two second urging portions 162B are arranged for one driver IC 15B. Of the two second urging portions 162A, one contacts the left portion of the driver IC 15A, and the other contacts the right portion of the driver IC 15A. Of the two second urging portions 162B, one contacts the left portion of the driver IC 15B, and the other contacts the right portion of the driver IC 15B. As shown in Figures 3 and 4, the driver ICs 15A and 15B are long in the left-right direction.

[0047] A sealing material B is disposed along the inner peripheral edge of the frame 19. The sealing material B may be, for example, a thermosetting fluorine-based potting material.

[0048] As shown in Figure 5, the sealant B is disposed along the edge of the connection portion 141, and isolates the space between the connection portion 141 and the actuator member 13 from the external space. If ink or moisture in the air enters the space, migration may occur between the multiple individual electrodes 133. The sealant B can prevent this migration.

[0049] The volatile components in the ink react with the sealant B, causing it to change in quality.

[0050] As described above, according to this embodiment, the first biasing portion 161 of the leaf spring 16 biases the connection portion 141 toward the actuator member 13 (see FIG. 5). This makes it difficult for the COF 14 to peel off from the actuator member 13.

[0051] The leaf spring 16 not only has a first biasing portion 161 that biases the connection portion 141 toward the actuator member 13, but also has second biasing portions 162A and 162B that bias the driver ICs 15A and 15B toward the heat dissipation member 17 (see FIGS. 5 to 7). This makes it possible to obtain both the effect that the COF 14 is less likely to peel off from the actuator member 13 and the effect that the heat generated by the driver ICs 15A and 15B is efficiently released to the heat dissipation member 17 by using one leaf spring 16.

[0052] Two second biasing portions 162A are arranged for one driver IC 15A, and two second biasing portions 162B are arranged for one driver IC 15B (see FIGS. 3, 4, and 7). This allows the driver ICs 15A and 15B to be biased toward the heat dissipation member 17 in a balanced manner.

[0053] One first urging portion 161 is disposed between two second urging portions 162A, and one first urging portion 161 is disposed between two second urging portions 162B (see FIG. 7). This allows the urging force of the first urging portion 161 and the urging forces of the second urging portions 162A and 162B to act in a well-balanced manner.

[0054] The first biasing portion 161 biases the peripheral portion of the connection portion 141 toward the actuator member 13 (see FIG. 5). The peripheral portion of the connection portion 141 is the boundary between the connection portion 141 and the folded-back portion 142, and is a portion that is likely to peel off from the actuator member 13. In this embodiment, biasing this portion makes it possible to more reliably prevent the COF 14 from peeling off from the actuator member 13.

[0055] The first biasing portion 161 biases the peripheral edge of the connection portion 141 toward the actuator member 13 via the outer circumferential portion 182 of the pressing member 18 (see FIG. 5). In this case, the pressing force from the outer circumferential portion 182 of the pressing member 18 can more reliably prevent the COF 14 from peeling off from the actuator member 13. Furthermore, since the pressing member 18 has a recess 181 that overlaps with the contact region 13R, no load is applied to the joint portion of the contacts 139, 149 arranged in the contact region 13R, and further, deformation of the actuator member 13 is not hindered.

[0056] The two protrusions 183 of the pressing member 18 are inserted into the two through holes 163 of the leaf spring 16, and adhesive A is applied thereto. The adhesive A closes the two through holes 163 and bonds the leaf spring 16 and the pressing member 18 together (see FIGS. 3 and 4). In this case, the leaf spring 16 can be positioned in the left-right direction, which is the direction in which the two protrusions 183 are aligned.

[0057] The two through holes 163 are each larger in size than the two protrusions 183 in any direction perpendicular to the up-down direction (see FIGS. 3 and 4). In this case, when assembling the leaf spring 16 and the pressing member 18, a load is less likely to be applied to the periphery of the through holes 163 of the leaf spring 16. In addition, it is easy to fill the through holes 163 with adhesive A, and the leaf spring 16 and the pressing member 18 can be firmly bonded together.

[0058] The head 10 is provided with an adhesive tape 11 that is disposed between the pressing member 18 and the COF 14 and secures the pressing member 18 and the COF 14 to each other (see FIG. 5). The adhesive tape 11 is disposed across a connection portion 141 and a folded portion 142 of the COF 14. The adhesive tape 11 has the function of maintaining the orientation of the folded portion 142, but when the adhesive tape 11 reacts with volatile components in the ink and the viscosity of the adhesive tape 11 decreases, the folded portion 142 sags. When the folded portion 142 sags, the radius of the boundary between the connection portion 141 and the folded portion 142 increases, and a force is applied to the vicinity of the boundary of the connection portion 141 in a direction away from the actuator member 13, which may cause a contact 149 of the connection portion 141 to peel off from a contact 139 of the actuator member 13. However, in this embodiment, the first biasing portion 161 of the leaf spring 16 biases the connection portion 141 toward the actuator member 13, so that the COF 14 is less likely to peel off from the actuator member 13.

[0059] The head 10 includes a sealant B disposed along the end of the connection portion 141 to isolate the space between the connection portion 141 and the actuator member 13 from the outside (see FIG. 5). If the amount of sealant B is uneven between the front and rear ends of the connection portion 141, the sealant B will cure at different rates, causing a rotational moment to be applied to the COF 14. Similarly, if the sealant B reacts with a volatile component in the ink and changes its properties, a rotational moment may be applied to the COF 14. As a result, if the connection portion 141 is disposed at an angle with respect to the top surface 13X of the actuator member 13, the contact 149 of the connection portion 141 may peel off from the contact 139 of the actuator member 13. However, in this embodiment, the first biasing portion 161 of the leaf spring 16 biases the connection portion 141 toward the actuator member 13, making it difficult for the COF 14 to peel off from the actuator member 13.

[0060] The biasing member is a leaf spring 16 (see FIG. 7). In this case, by using the leaf spring 16, which has a relatively simple configuration, as the biasing member, the number of parts and manufacturing costs of the entire head 10 can be reduced.

[0061] <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.

[0062] The biasing member is not limited to a leaf spring, but may be a compression spring, a torsion coil spring, or the like.

[0063] The biasing member may not have the second biasing portion.

[0064] The flow path member is not limited to a serial type, but may be a line type.

[0065] 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.

[0066] The liquid ejected from the nozzles is not limited to having a volatile component. Furthermore, the liquid ejected from the nozzles is not limited to ink, and may be any liquid (for example, a treatment liquid that aggregates or precipitates components in the ink).

[0067] 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]

[0068] 10 heads (liquid ejection heads) 11 Adhesive tape (adhesive material) 12 Flow path member 121 common flow path (liquid flow path) 122 Individual flow path (liquid flow path) 123 nozzle 12X top 13 Actuator member 139 contact (first contact) 13R contact area 13X top 14 COF (wiring materials) 141 Connection part 142 Folded part 149 contacts (second contacts) 15A, 15B Driver IC (driving member) 16 Leaf spring (biasing member) 161 1st biasing section 162A,162B 2nd biasing part 163 Through Hole 17 Heat dissipation material 18 Pressing member 181 recess 182 Outer periphery 183 Convex A adhesive B Encapsulant

Claims

1. a flow path member having a liquid flow path including a nozzle; an actuator member for ejecting liquid from the nozzle, the actuator member being disposed on an upper surface of the flow path member and having an upper surface on which a first contact point is disposed; a wiring member including: a connection portion disposed on the upper surface of the actuator member and having a second contact connected to the first contact; and a folded portion folded upward from an end of the connection portion; a biasing member disposed above the connection portion, the biasing member having a first biasing portion that biases the connection portion toward the actuator member; A liquid ejection head comprising:

2. a driving member disposed above the biasing member; a heat dissipation member disposed above the driving member, 2. The liquid ejection head according to claim 1, wherein the biasing member further comprises a second biasing portion that biases the driving member toward the heat dissipating member.

3. 3. The liquid ejection head according to claim 2, wherein two of the second biasing portions are arranged for one of the driving members.

4. 4. The liquid ejection head according to claim 3, wherein the first biasing portion is disposed between the two second biasing portions.

5. 2. The liquid ejection head according to claim 1, wherein the first biasing portion biases the peripheral edge of the connection portion toward the actuator member.

6. a pressing member disposed between the connection portion and the biasing member, the pressing member having a recess overlapping a contact area on the upper surface of the actuator member in a direction perpendicular to the upper surface of the actuator member and the contact area where the first contact is disposed, and an outer periphery surrounding the recess; 6. The liquid ejection head according to claim 5, wherein the first biasing portion biases the peripheral edge of the connecting portion toward the actuator member via the outer periphery.

7. the pressing member has two protrusions protruding from the connection portion toward the biasing member in the orthogonal direction, the biasing member has two through holes into which the two protrusions are respectively inserted in the orthogonal direction, 7. The liquid ejection head according to claim 6, further comprising an adhesive that closes the two through holes into which the two protrusions are respectively inserted and bonds the biasing member and the pressing member together.

8. The liquid ejection head according to claim 7 , wherein the two through holes are larger in size than the two protrusions in a direction perpendicular to the orthogonal direction.

9. an adhesive member disposed between the pressing member and the wiring member to fix the pressing member and the wiring member to each other, the adhesive member being disposed across the connecting portion and the folded-back portion; The liquid has a volatile component, 7. The liquid ejection head according to claim 6, wherein the volatile component reduces the viscosity of the adhesive member.

10. 2. The liquid ejection head according to claim 1, further comprising a sealant disposed along the end of the connecting portion, for isolating a space between the connecting portion and the actuator member from an external space.

11. 11. The liquid ejection head according to claim 1, wherein the biasing member is a leaf spring.

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