JP5920576B2 - Channel member, liquid ejecting head, and liquid ejecting apparatus - Google Patents

Description

  The present invention relates to a flow path member that supplies liquid to a head body that discharges liquid from a nozzle opening, a liquid ejecting head that includes the flow path member, and a liquid ejecting apparatus that includes the liquid ejecting head.

  A typical example of a liquid ejecting head that ejects droplets is an ink jet recording head that ejects ink droplets. As this ink jet recording head, for example, a head main body that discharges ink droplets from a nozzle opening and a head main body are fixed, and an ink cartridge (liquid supply means) that stores ink is detachably provided, An apparatus including a flow path member that supplies ink from an ink cartridge to a head body has been proposed (for example, see Patent Document 1).

  According to this patent document 1, a supply portion made of a pressure contact body formed of a porous material or the like is provided in an ink cartridge, and the supply portion is pressed against a filter provided in the flow path member and the pressure contact body and the filter are connected to each other. By sealing the periphery with a sealing member, the ink cartridge and the flow path member are connected.

JP 2007-15272 A

  However, the configuration as in Patent Document 1 has a problem that when the ink cartridge is attached to the flow path member, there is no space for the seal member to deform and escape, and the reaction force of the seal member increases. When the reaction force of the seal member increases as described above, it becomes difficult to attach the ink cartridge, and the ink cartridge and the flow path member are deformed so as to be warped by the reaction force.

  In addition, if a space is defined between the inner surface of the seal member and the flow path member, the seal member may drop from the flow path member at an unexpected timing such as when the ink cartridge is attached or detached. is there.

  Such a problem is not limited to the flow path member used in the ink jet recording head, and similarly exists in the flow path member used in the liquid ejecting head other than the ink.

  In view of such circumstances, the present invention makes it easy to attach the seal member, suppresses the reaction force by the seal member from becoming significantly large, and reduces the release of the seal member at an unexpected timing. An object is to provide a liquid ejecting head and a liquid ejecting apparatus.

According to an aspect of the present invention for solving the above-described problems, a liquid supply path that supplies a liquid to a head body that discharges liquid, and a liquid supply unit that opens one of the liquid supply paths and supplies the liquid in the liquid supply path. A flow path member body provided with a mounting portion, a filter fixed to the mounting portion and covering the opening of the liquid supply path, and provided around the mounting portion and formed of an elastic material. An insertion hole into which the mounting portion is inserted. The inner surface of the insertion hole protrudes toward the mounting portion and is attached to the sealing member. A protrusion is provided in close contact with the portion, and a space is defined between the insertion hole and the mounting portion in a region other than the protrusion, and the seal member is a first seal having a cylindrical shape. And the first seal portion A second seal portion having a cylindrical shape, and a third seal portion that connects ends of the first seal portion and the second seal portion and abuts against the liquid supply means. Located in the channel member.
In such an aspect, since only the protruding portion of the seal member contacts the mounting portion, the contact area can be reduced and the sealing performance can be improved. In addition, since the seal member, the mounting portion, and the space are defined in a region other than the protrusion, the seal member is easily elastically deformed using the space, and the reaction force of the seal member is prevented from being significantly increased. Can do. Furthermore, since the seal member is in close contact with the attachment portion by the protrusion, the seal member can be prevented from being displaced or dropped at an unexpected timing.
Further, since the third seal portion is supported by the first seal portion and the second seal portion, the third seal portion is easily bent and deformed, and the sealing performance can be improved.
Here, it is preferable that end portions of the first seal portion and the second seal portion on the side opposite to the end portion to which the third seal portion is connected are curved surfaces. According to this, the contact area between the flow path member main body and the seal member is reduced, and the sealing performance can be improved by always contacting with the same area.
According to still another aspect of the invention, there is provided a liquid ejecting head including the flow path member according to the above aspect and a head main body.
In this aspect, it is possible to realize a liquid ejecting head that suppresses liquid leakage and reduces deformation.
According to another aspect of the invention, there is provided a liquid ejecting apparatus including the liquid ejecting head according to the above aspect.
In this aspect, it is possible to realize a liquid ejecting apparatus that suppresses liquid leakage and reduces deformation.
In another aspect, the liquid supply path for supplying the liquid to the head main body that discharges the liquid, and an attachment portion to which one of the liquid supply paths is open and the liquid supply means for supplying the liquid in the liquid supply path is attached. And a filter member that is fixed to the mounting portion and covers the opening of the liquid supply path, and a sealing member that is provided around the mounting portion and formed of an elastic material. And the seal member is provided with an insertion hole into which the mounting portion is inserted, and the inner surface of the insertion hole protrudes toward the mounting portion and is in close contact with the mounting portion. The channel member is characterized in that a projection is provided, and a space is defined between the insertion hole and the attachment portion in a region other than the projection.
In such an aspect, since only the protruding portion of the seal member contacts the mounting portion, the contact area can be reduced and the sealing performance can be improved. In addition, since the seal member, the mounting portion, and the space are defined in a region other than the protrusion, the seal member is easily elastically deformed using the space, and the reaction force of the seal member is prevented from being significantly increased. Can do. Furthermore, since the seal member is in close contact with the attachment portion by the protrusion, the seal member can be prevented from being displaced or dropped at an unexpected timing.

  Here, the seal member includes a first seal portion having a cylindrical shape, a second seal portion having a cylindrical shape provided in the first seal portion, and the first seal portion and the second seal portion. It is preferable to comprise the 3rd seal part which a liquid supply means contact | connects while connecting edge parts. According to this, since the 3rd seal part is supported by the 1st seal part and the 2nd seal part, the 3rd seal part is easy to bend and change, and it can improve sealing performance.

  Moreover, it is preferable that the edge part on the opposite side to the edge part to which the said 3rd seal part of the said 1st seal part and the said 2nd seal part connects is each a curved surface. According to this, the contact area between the flow path member main body and the seal member is reduced, and the sealing performance can be improved by always contacting with the same area.

According to still another aspect of the invention, there is provided a liquid ejecting head including the flow path member according to the above aspect and a head main body.
In this aspect, it is possible to realize a liquid ejecting head that suppresses liquid leakage and reduces deformation.

According to another aspect of the invention, there is provided a liquid ejecting apparatus including the liquid ejecting head according to the above aspect.
In this aspect, it is possible to realize a liquid ejecting apparatus that suppresses liquid leakage and reduces deformation.

FIG. 3 is an exploded perspective view of the recording head according to the first embodiment. FIG. 3 is a cross-sectional view of the recording head according to the first embodiment. 3 is a perspective view of a seal member according to Embodiment 1. FIG. FIG. 3 is an enlarged cross-sectional view of a main part of the flow path member according to the first embodiment. FIG. 5 is a cross-sectional view illustrating a method for mounting an ink cartridge on a flow path member. FIG. 5 is a cross-sectional view of a main part of a recording head showing a comparative example of a seal member. FIG. 5 is a cross-sectional view of a main part of a recording head showing a comparative example of a seal member. 6 is an enlarged cross-sectional view of a main part of a flow path member according to Embodiment 2. FIG. It is sectional drawing to which the principal part of the recording head concerning other embodiment was expanded. 1 is a schematic diagram of a recording apparatus according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail based on embodiments.
(Embodiment 1)
FIG. 1 is an exploded perspective view of an ink jet recording head that is a liquid ejecting head according to Embodiment 1 of the present invention, and FIG. 2 is a cross-sectional view of the ink jet recording head.

  As shown in the figure, the ink jet recording head 10 of the present embodiment includes a flow path member 30 to which an ink cartridge 20 as a liquid supply unit storing ink as a liquid is attached and detached, and a head main body fixed to the flow path member 30. 40.

  The flow path member 30 includes a flow path member main body 310 and a seal member 330 provided on the flow path member main body 310.

  The flow path member main body 310 has a liquid supply path 311 through which ink, which is a liquid, passes, and a cartridge mounting portion 312 to which the ink cartridge 20 is mounted is provided on one surface where the liquid supply path 311 opens. Yes. In the present embodiment, four ink cartridges 20 are mounted on the cartridge mounting portion 312.

  Further, the cartridge mounting portion 312 is surrounded by a wall portion 313, and a pair of opposing wall surfaces of the wall portion 313 has a first engagement hole 314 and a second engagement penetrating in the thickness direction, respectively. A hole 315 is provided.

  The first engagement hole 314 and the second engagement hole 315 are engaged with a first engagement claw 24 and a second engagement claw 25 of the ink cartridge 20 which will be described in detail later. 20 is fixed.

  In the present embodiment, since four ink cartridges 20 are mounted on the cartridge mounting portion 312, a partition plate 313 a is provided between the ink cartridges 20.

  Further, the cartridge mounting portion 312 of the flow path member main body 310 is provided with a mounting portion 316 protruding in a columnar shape. In the present embodiment, since the four ink cartridges 20 are fixed to the cartridge mounting portion 312, the same number of attachment portions 316 as the ink cartridges 20, that is, four attachment portions 316 are provided. The attachment portion 316 has a cylindrical shape provided with a liquid supply path 311 that opens to the front end surface, and a filter that covers the opening of the liquid supply path 311 on the protruding front end surface that the liquid supply path 311 opens. 317 is provided.

  The filter 317 is for removing foreign substances and bubbles contained in the liquid ink. For example, the filter 317 is a sheet-like one in which a plurality of fine holes are formed by finely knitting fibers such as metal and resin. In addition, a plate-like member such as metal or resin having a plurality of fine holes penetrated can be used. In addition, the filter 317 may use a nonwoven fabric etc., The material is not specifically limited.

  The filter 317 has a disk shape and is provided with substantially the same area as the distal end surface of the mounting portion 316 (opening surface where the liquid supply path 311 opens).

  An annular sealing groove 319 is provided around the mounting portion 316 provided with such a filter 317, and a sealing member 330 is provided in the sealing groove 319.

  Here, the seal member 330 will be described in detail with reference to FIGS. 3 and 4. 3 is a perspective view showing the seal member, and FIG. 4 is an enlarged cross-sectional view of the main part of the flow path member.

  As shown in the drawing, the seal member 330 is made of an elastic material such as rubber or elastomer, and has a first seal portion 331 having a cylindrical shape and an inner diameter smaller than that of the first seal portion 331, and the first seal A second seal portion 332 having a cylindrical shape disposed inside the portion 331 and a disc-shaped third seal portion 333 in which the ends of the first seal portion 331 and the second seal portion 332 are continuous are integrated. An insertion hole 334 into which the attachment portion 316 is inserted is provided at the center.

  The first seal portion 331 has a cylindrical shape and has an outer diameter slightly smaller than that of the sealing groove 319. As a result, the first seal portion 331 does not come into contact with the inner wall of the seal groove portion 319, and the seal member 330 can be easily inserted into the seal groove portion 319.

  The second seal portion 332 has a cylindrical shape provided with an insertion hole 334 into which the attachment portion 316 is inserted at the center. Further, the insertion hole 334 of the second seal portion 332 is provided with a projection 335 that protrudes toward the attachment portion 316 side.

  In the present embodiment, the protrusion 335 is provided at the end of the second seal portion 332 opposite to the filter 317, and extends in the circumferential direction of the inner peripheral surface (insertion hole 334) of the second seal portion 332. Are provided continuously.

  Such a protrusion 335 is formed so that the surface on the attachment portion 316 side is a convex curved surface, that is, the cross section is arcuate (semicircular). That is, the corners on both sides of the surface of the projection 335 that contacts the mounting portion 316, that is, the corners of the projection 335 on the filter 317 side and the channel member body 310 side in the cross section shown in FIG. Then, it is a curved surface.

  In addition, the inner diameter of the region of the insertion hole 334 in which the protrusion 335 is provided is provided so as to be in close contact with the outer periphery of the attachment portion 316. In this way, by rounding the corners of the protrusions 335 and projecting the protrusions 335 until they contact the attachment parts 316, the seal member 330 can be easily attached and detached from the outside of the attachment parts 316. In addition, by making the surface of the protruding portion 335 a convex curved surface, the outer peripheral surface of the mounting portion 316 can always be contacted on the same surface.

  The inner diameter of the protrusion 335 is set to be close to the outer periphery of the mounting portion 316, and the inner diameter of the insertion hole 334 other than the protrusion 335 has a slightly larger inner diameter than the outer periphery of the mounting portion 316. For this reason, when the seal member 330 is attached to the flow path member main body 310, the space between the seal member 330 and the attachment portion 316 is not provided in the region before the ink cartridge 20 is attached. Is defined.

  Further, the end surfaces of the first seal portion 331 and the second seal portion 332 that are in contact with the flow path member main body 310 are formed as curved surfaces. In the present embodiment, the end surfaces of the first seal portion 331 and the second seal portion 332 are formed so as to have a convex curved shape in which a substantially central portion in the thickness direction protrudes, that is, a cross section has a semicircular shape. As a result, when the ink cartridge 20 comes into contact with the seal member 330 and the seal member 330 is elastically deformed by the ink cartridge 20, the end surfaces of the first seal portion 331 and the second seal portion 332 are always in the same state, and the flow path member. The sealing performance can be improved by contacting the main body 310.

  Such a seal member 330 is attached by inserting the attachment portion 316 into the insertion hole 334. At this time, since only the protrusion 335 provided on the second seal portion 332 of the seal member 330 is in close contact with the attachment portion 316, the pressure for press-fitting the attachment portion 316 into the insertion hole 334 of the seal member 330 can be reduced. . For this reason, the attachment of the seal member 330 to the flow path member main body 310 can be facilitated. Further, since the seal member 330 is in close contact with the outer periphery of the attachment portion 316 by the protrusion 335, it is expected that the ink cartridge 20 is detached from the flow path member 30 or when the attachment portion 316 is vertically downward during handling. It is possible to prevent the seal member 330 from being detached from the flow path member main body 310 at a timing that is not needed.

  Here, the ink cartridge 20 attached to and detached from the flow path member 30 will be described with reference to FIGS. 1 and 2.

  The ink cartridge 20 has a hollow box shape in which ink (liquid) is stored. Further, a cylindrical rib 21 is provided on the bottom surface of the ink cartridge 20, and a supply port 22 for supplying ink inside the ink cartridge 20 to the flow path member 30 is provided inside the rib 21. Yes. A supply unit 23 is provided inside the supply port 22. The supply unit 23 is in pressure contact with the filter 317 of the flow path member 30 and supplies the ink in the ink cartridge 20 to the liquid supply path 311 of the flow path member 30. As such a supply part 23, porous materials, nonwoven fabrics, etc., such as cotton-like pulp, a polymeric water absorption polymer, a urethane foam, can be used, for example.

  The ink cartridge 20 includes a first engagement claw 24 inserted into a first engagement hole 314 provided in the wall portion 313 of the flow path member main body 310, and a surface opposite to the first engagement claw 24. And a second engagement claw 25 that is inserted into a second engagement hole 315 provided in the wall portion 313 of the flow path member main body 310 is provided.

  The second engagement claw 25 is formed integrally with the ink cartridge 20 so that one end is fixed to the supply part 23 side of the side surface of the ink cartridge 20 and the other end is a free end. . Thereby, the second engaging claw 25 can be elastically deformed toward the side surface of the ink cartridge 20.

  A method of mounting such an ink cartridge 20 on the flow path member 30 will be described with reference to FIGS. FIG. 5 is a cross-sectional view showing a method of mounting the ink cartridge according to Embodiment 1 of the present invention on the flow path member.

  First, as shown in FIG. 5A, the first engagement claw 24 side of the ink cartridge 20 is first inserted obliquely into the wall portion 313 of the flow path member main body 310, and the first engagement claw 24 is inserted. Insert into the first engagement hole 314.

  Next, as shown in FIG. 5B, the ink cartridge 20 is rotated with the first engagement claw 24 as a fulcrum while the first engagement claw 24 of the ink cartridge 20 is inserted into the first engagement hole 314. By doing so, the ink cartridge 20 is inserted into the wall portion 313. At this time, the second engaging claw 25 is pressed against the wall portion 313 of the flow path member main body 310 and is elastically deformed, so that the insertion of the ink cartridge 20 into the wall portion 313 is not hindered. Thereby, the supply part 23 and the filter 317 are connected.

  Further, by attaching the ink cartridge 20 to the flow path member in this way, the rib 21 of the ink cartridge 20 abuts on the third seal portion 333 of the seal member 330 as shown in FIG. Is elastically deformed. Specifically, since the third seal portion 333 is supported by the upper ends (end portions on the filter 317 side) of the first seal portion 331 and the second seal portion 332, as shown in FIG. The three seal portion 333 is bent and deformed so as to protrude toward the flow path member main body 310 between the first seal portion 331 and the second seal portion 332 by pressing from the ink cartridge 20. Further, when the third seal portion 333 is bent and deformed so as to be convex toward the flow path member main body 310, the first seal portion 331 and the second seal portion 332 are also bent and deformed so as to be curved. Specifically, the first seal portion 331 is deformed so as to protrude toward the outer side opposite to the attachment portion 316. In addition, the second seal portion 332 is deformed so as to be convex toward the attachment portion 316 side. However, in the second seal portion 332, the projection portion 335 is in close contact with the attachment portion 316, and the region other than the projection portion 335 is the attachment portion. Since a space is defined between the mounting portion 316 and the space 316, the region other than the projecting portion 335 is deformed so as to be convex in the space between the mounting portion 316. As a result, when the ink cartridge 20 is attached to the flow path member 30, the force (reaction force) for pushing the ink cartridge 20 of the seal member 330 back in the attaching / detaching direction (the side opposite to the flow path member main body 310) may be significantly increased. In addition, the mounting property of the ink cartridge 20 can be improved, and deformation due to the reaction force of the ink cartridge 20, the flow path member 30, and the head main body 40 can be suppressed. In the present embodiment, the curved surface of the protrusion 335 is in contact with the outer periphery of the mounting portion 316. Therefore, the contact area can be reduced and the sealing performance can be improved.

  On the other hand, as shown in FIG. 6A, the protrusion 335 is not provided on the seal member 330, and the inner surface of the insertion hole 334 of the seal member 330 is not attached to the ink cartridge 20 (rib 21). When the ink cartridge 20 is attached to the flow path member 30, the rib 21 presses the third seal portion 333 as shown in FIG. 6B. However, since there is no space for the second seal portion 332 to bend and deform between the attachment portion 316, the pressure (reaction force) in the direction in which the seal member 330 removes the ink cartridge 20 is increased. When the reaction force of the seal member is increased in this manner, the mounting load of the ink cartridge 20 is increased and it is difficult to attach, and the ink cartridge 20, the flow path member 30, and the head main body 40 may be deformed by the reaction force. . Further, in the seal member 330 shown in FIG. 6, the entire inner surface (insertion hole 334) of the second seal portion 332 is in contact with the outer periphery of the attachment portion 316, so that the contact area is large and the sealing performance is lowered.

  In this embodiment, the end of the first seal portion 331 and the second seal portion 332 opposite to the third seal portion 333 is a curved surface so that the curved surface is in contact with the flow path member main body 310. Therefore, the contact area can be narrowed to improve the sealing performance, and the region where the seal member 330 contacts the flow path member main body 310 is limited to one place, and the first seal portion 331 and the second seal portion Even if the 332 is inclined by deformation, the same position always contacts with the same area, so that the sealing performance can be stably secured.

  On the other hand, as shown in FIG. 7, when the end surfaces of the first seal portion 331 and the second seal portion 332 of the seal member 330 are formed with curved surfaces having a concave cross section, FIG. As shown in FIG. 5, when the seal member 330 is pressed against the ink cartridge 20 and elastically deformed, the flow path member main body 310 and the seal member 330 come into contact with each other only at the corners (edge portions) of the end surfaces. As described above, in the state where only the corner portion of the seal member 330 is in contact with the flow path member main body 310 and is almost in line contact, which edge is in contact depending on the deformation of the seal member 330 becomes unstable. Sealing properties cannot be secured when the contacting edge is switched.

  The head main body 40 is fixed to the surface of the flow path member 30 opposite to the cartridge mounting portion 312.

  The head main body 40 is provided with a liquid ejecting surface on which a nozzle that ejects ink droplets as a liquid opens on the side opposite to the surface fixed to the flow path member 30. Further, inside the head main body 40 (not shown) are provided a liquid flow path that communicates with the nozzles and communicates with the flow path of the flow path member 30, and a pressure generating means that causes a pressure change in the ink in the liquid flow path. ing. As such a pressure generating means, for example, the volume of the liquid flow path is changed by deformation of a piezoelectric actuator having a piezoelectric material exhibiting an electromechanical conversion function, thereby causing a pressure change in the ink in the liquid flow path, so that ink droplets are ejected from the nozzles. A device that discharges, a heat generating element placed in the liquid flow path, a device that discharges ink droplets from the nozzle by bubbles generated by the heat generated by the heat generating device, or an electrostatic force is generated between the diaphragm and the electrode. A so-called electrostatic actuator or the like that discharges ink droplets from nozzles by deforming the diaphragm by electrostatic force can be used.

  In such an ink jet recording head 10, the ink from the ink cartridge 20 is supplied to the head main body 40 via the flow path member 30, and the pressure in the liquid flow path is caused to change by the pressure generating means. Ink droplets are ejected from the nozzles.

  As described above, in the ink jet recording head 10 of the present embodiment, when the seal member 330 is attached to the flow path member main body 310, only the protrusion 335 of the seal member 330 is in close contact with the attachment portion 316. It is easy to attach 330 to the flow path member main body 310. Further, since the seal member 330 is in close contact with the attachment portion 316 by the protrusion 335, the ink cartridge 20 is detached from the flow path member 30, or at an unexpected timing such as when the attachment portion 316 is directed vertically downward during handling. It is possible to suppress the seal member 330 from being detached from the outer periphery of the attachment portion 316.

  Further, since the protrusion 335 of the seal member 330 is formed with a convex curved section, it is possible to narrow the area in contact with the mounting portion 316 and improve the sealing performance. Further, in a region other than the protrusion 335 of the seal member 330, a space is defined between the seal member 330 and the attachment portion 316. Therefore, the second seal portion 332 is elastically deformed using this space. Thus, the reaction force for pressing the ink cartridge 20 in the attaching / detaching direction can be reduced. Therefore, deformation due to the reaction force of the ink cartridge 20, the flow path member 30, and the head main body 40 can be suppressed.

(Embodiment 2)
FIG. 8 is an enlarged cross-sectional view of the main part of the flow path member according to Embodiment 2 of the present invention. In addition, the same code | symbol is attached | subjected to the member similar to Embodiment 1 mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in FIG. 8, the flow path member 30 of the present embodiment includes a flow path member main body 310 and a seal member 330A.

  The seal member 330A includes a first seal portion 331, a second seal portion 332A, and a third seal portion 333, and the first seal portion 331, the second seal portion 332A, and the third seal portion 333 are integrated. Is formed.

  Further, the second seal portion 332A is provided with a projection 335A that protrudes toward the attachment portion 316. In the present embodiment, the protruding portion 335A is provided on the filter 317 side of the second seal portion 332A, and the second seal portion 332A and the attachment portion 316 on the side of the flow path member main body 310 (head main body 40) have a space. Is defined.

  Further, the protrusion 335A is formed so that the surface on the mounting portion 316 side is a convex curved surface, that is, the cross section is arcuate (semicircular).

  Even in the seal member 330A having such a configuration, the protruding portion 335A comes into close contact with the mounting portion 316 as in the first embodiment, and thus the seal member 330A is detached from the flow path member main body 310 at an unexpected timing. Can be suppressed.

  In addition, since the protrusion 335A of the present embodiment has a convex curved section, the area in contact with the attachment portion 316 is narrow, and the sealing performance can be improved.

  Further, since a space is defined between the second seal portion 332A and the attachment portion 316 in a region other than the projection portion 335A, the second seal portion 332A can be elastically deformed using the space, and the ink cartridge The reaction force that presses 20 in the detaching direction can be reduced.

(Other embodiments)
As mentioned above, although each embodiment of this invention was described, the fundamental structure of this invention is not limited to what was mentioned above.

  For example, in the first and second embodiments described above, the protrusions 335 and 335A are provided at the end portions of the second seal portions 332 and 332A (the end portion on the flow path member main body 310 side and the end portion on the third seal portion 333 side). However, the position where the protrusions 335 and 335A are provided is not particularly limited to this. Here, another example of the protrusion is shown in FIG. FIG. 9 is an enlarged cross-sectional view of a main part of a flow path member showing another example of a seal member according to another embodiment.

  As shown in FIG. 9A, the seal member 330B includes a first seal portion 331, a second seal portion 332B, and a third seal portion 333, and an insertion hole 334 inside the second seal portion 332B has a A protrusion 335B is provided.

  The protrusion 335B is formed in a semicircular shape so that the cross section becomes a convex curved surface. Further, the protrusion 335B is provided at a position away from the end in contact with the flow path member main body 310 toward the filter 317. Further, the protrusion 335B is provided at a position away from the end on the third seal portion 333 side. That is, a space is defined between the second seal portion 332B and the attachment portion 316 above and below the projection portion 335B (on the third seal portion 333 side and the flow path member main body 310 side). 9A shows the projection 335B shifted to the flow channel member main body 310 side, and FIG. 9B shows the projection 335B on the filter 317 side (third seal portion 333 side). It is arranged by shifting. As described above, even when the protrusion 335B is provided in a region other than the end of the second seal portion 332B, the same effects as those of the first and second embodiments described above can be obtained.

  Moreover, in Embodiment 1 mentioned above, as the sealing members 330, 330A, and 330B, a hollow that opens on one surface constituted by the first seal portion 331, the second seal portions 332, 332A, 332B, and the third seal portion 333 is provided. Although the member has been illustrated, the present invention is not particularly limited thereto. For example, a solid member may be used as the seal member, and the shape thereof is not particularly limited.

  Of course, the shape of the protrusions 335, 335A, and 335B is not particularly limited, and the cross section may be a polygonal shape such as a triangular shape or a rectangular shape.

  Further, the ink jet recording head 10 of the above-described embodiment constitutes a part of an ink jet recording head unit including an ink flow path communicating with an ink cartridge or the like, and is mounted on the ink jet recording apparatus. FIG. 10 is a schematic view showing an example of the ink jet recording apparatus.

  In the ink jet recording apparatus I shown in FIG. 10, a plurality of ink jet recording heads 10 are detachably provided with an ink cartridge 20 constituting an ink supply means, and the carriage 3 on which the ink jet recording heads 10 are mounted is an apparatus. A carriage shaft 5 attached to the main body 4 is provided so as to be movable in the axial direction. The ink jet recording head 10 ejects, for example, a black ink composition and a color ink composition.

  The driving force of the driving motor 6 is transmitted to the carriage 3 through a plurality of gears and timing belt 7 (not shown), so that the carriage 3 on which the ink jet recording head 10 is mounted is moved along the carriage shaft 5. . On the other hand, the apparatus body 4 is provided with a platen 8 along the carriage shaft 5, and a recording sheet S that is a recording medium such as paper fed by a paper feed roller (not shown) is wound around the platen 8. It is designed to be transported.

  Furthermore, in the above-described example, the ink jet recording head 10 including the flow path member 30 has been described. However, the present invention also applies to an ink jet recording apparatus in which the flow path member 30 is provided in a portion other than the ink jet recording head 10. Can be applied. Specifically, an ink tank, which is a liquid supply means storing ink, is not mounted on the carriage 3 but is fixed to the apparatus main body 4, and the ink tank and the head main body 40 are connected by a tube-like supply pipe. In the case of an ink jet recording apparatus that performs this, for example, the above-described flow path member 30 may be provided at a place where an ink tank is installed.

  In the ink jet recording apparatus I described above, the ink jet recording head 10 is mounted on the carriage 3 and moved in the main scanning direction. However, the present invention is not particularly limited thereto. The present invention can also be applied to a so-called line type recording apparatus in which printing is performed simply by moving a recording sheet S such as paper in the sub-scanning direction.

  Furthermore, the present invention is widely intended for a manufacturing method for all liquid ejecting heads. For example, recording heads such as various ink jet recording heads used in image recording apparatuses such as printers, and color filters such as liquid crystal displays. This method is also applicable to manufacturing methods of color material ejection heads used in the manufacture of electrodes, electrode materials ejection heads used in electrode formation for organic EL displays, FEDs (field emission displays), and bio-organic matter ejection heads used in biochip production. be able to.

  The present invention is not limited to the flow path member mounted on the liquid ejecting head and the liquid ejecting apparatus, and can be applied to the flow path member mounted on other devices.

  I ink jet recording apparatus (liquid ejecting apparatus), 10 ink jet recording head (liquid ejecting head), 20 ink cartridge (liquid supply means), 23 supply unit, 30 flow path member, 40 head body, 310 flow path member main body, 311 Liquid supply path, 312 Cartridge mounting portion, 316 mounting portion, 330, 330A, 330B seal member, 331 first seal portion, 332, 332A, 332B second seal portion, 333 third seal portion, 334 insertion hole, 335, 335A, 335B Protrusion

Claims (4)

A liquid supply path for supplying a liquid to the head main body for discharging the liquid, and a mounting portion to which one of the liquid supply paths is open and a liquid supply means for supplying the liquid in the liquid supply path is attached. A road member body;
A filter fixed to the mounting portion and covering the opening of the liquid supply path;
A seal member provided around the mounting portion and formed of an elastic material,
The seal member is provided with an insertion hole into which the attachment portion is inserted, and an inner surface of the insertion hole is provided with a protruding portion that protrudes toward the attachment portion and closely contacts the attachment portion. In a region other than the projection, a space is defined between the insertion hole and the mounting portion .
The seal member includes a first seal portion having a cylindrical shape, a second seal portion having a cylindrical shape provided in the first seal portion, and ends of the first seal portion and the second seal portion. And a third seal portion with which the liquid supply means comes into contact. The end opposite to the end portion of the third seal portion of the first seal portion and the second sealing portion are connected has a passage member according to claim 1, characterized in that it is a curved surface, respectively . And the flow path member according to claim 1 or 2, a liquid-jet head characterized by including a head body. A liquid ejecting apparatus comprising the liquid ejecting head according to claim 3 .

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