JP2013123830A - Channel member, liquid ejection head, and liquid ejection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a channel member, a liquid ejection head and a liquid ejection device in which gas is prevented from entering a liquid channel.SOLUTION: The channel member includes: a channel member body 310 which is provided with a liquid channel 311 for supplying a head body 40 ejecting liquid with liquid, and is provided with an attaching part 316 for attaching a liquid supply means 20 for supplying liquid to one opening of the liquid channel 311; a filter 317 which is attached to the attaching part 316 and covers the opening of the liquid channel 311; and a sealing member 330 which is formed of an elastic material and is arranged covering the periphery of the attaching part 316 of the channel member body 310. A sealing space 336 which is demarcated by the liquid supply means 20 around the attaching part 316 of the channel member body 310 and the sealing member 330 is communicated with the outside through a communication passage 334. The communication passage 334 is provided with a discharge means which can discharge fluid in the sealing space 336 to the outside.

Description

  The present invention relates to a flow path member provided with a liquid flow path, a liquid ejecting head, and a liquid ejecting apparatus.

  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 storage 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 Patent Document 1, a supply portion made of a pressure contact member formed of a porous material or the like is provided on an ink cartridge, and the supply portion is pressed against a filter provided on a flow path member, whereby the ink cartridge and the ink cartridge are flown. The road member is connected.

JP 2007-15272 A

  However, if a sealed space exists in the space defined by the seal member of the flow path member and the liquid supply means, the pressure in the sealed space increases when the liquid supply means is attached to the flow path member, and the seal is sealed. There is a problem in that gas enters the filter side from the stop space and the gas stays in the form of bubbles on the filter, thereby closing the liquid flow path.

  Such a problem exists not only in a flow path member used for a liquid jet head such as an ink jet recording head but also in a flow path member used in a device other than the liquid jet head.

  In view of such circumstances, it is an object of the present invention to provide a flow path member, a liquid ejecting head, and a liquid ejecting apparatus that can suppress gas from entering a liquid flow path.

An aspect of the present invention that solves the above problem is provided with a liquid flow path that supplies a liquid to a head body that ejects liquid, and one of the liquid flow paths is attached with a liquid supply means that supplies the liquid A channel member body provided with a portion, a filter attached to the mounting portion and covering the opening of the liquid channel, and formed around the mounting portion of the channel member body and formed of an elastic material. A sealing space defined by the liquid supply means and the sealing member around the mounting portion of the flow path member main body is communicated to the outside through a communication path. In the flow path member, the communication path is provided with discharge means capable of discharging the fluid in the sealed space to the outside.
In this aspect, since the inside of the sealed space can be made negative pressure by discharging the fluid in the sealed space around the mounting portion to the outside, the gas contained in the liquid that has passed through the liquid flow path is filtered. It is ensured as a bubble above, and the bubble secured on the filter can be discharged into the sealed space.

  Here, the communication path is a slit provided in the seal member to communicate the sealing space and the outside, and the seal member is pressed by the liquid supply means to open the slit, and the seal It is preferable to function as the discharge means for closing the slit by returning to the original state by the reaction force of the member. According to this, it is possible to reduce the size as compared with the case where the communication channel is provided in the flow path member main body, the liquid supply means, etc., and the fluid in the sealed space can be obtained only by a simple method of mounting the liquid supply means. Can be discharged to the outside to create a negative pressure in the sealed space.

According to another aspect of the invention, there is provided a liquid ejecting head including the flow path member according to the above aspect.
According to this aspect, it is possible to realize a liquid ejecting head that can suppress the ejection failure of liquid droplets and can be downsized.

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 is improved in reliability and reduced in size.

According to another aspect of the invention, there is provided a liquid ejecting apparatus including the flow path member according to the above aspect.
In this aspect, it is possible to realize a liquid ejecting apparatus that is improved in reliability and reduced in size.

FIG. 3 is an exploded perspective view of the recording head according to the first embodiment. FIG. 2 is a cross-sectional view and an enlarged view of a recording head according to Embodiment 1. 3 is a perspective view of a seal member according to Embodiment 1. FIG. FIG. 3 is a cross-sectional view illustrating a method for mounting the ink cartridge according to Embodiment 1 on a flow path member. FIG. 3 is a cross-sectional view illustrating a method for mounting the ink cartridge according to Embodiment 1 on a flow path member. FIG. 3 is an enlarged cross-sectional view illustrating a main part of a method for mounting the ink cartridge according to the first embodiment on a flow path member. 3 is a side view showing a state of a seal member according to Embodiment 1. FIG. 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 and an enlarged view of a main part thereof. .

  As shown in the drawing, 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 storage means for 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 is provided with a liquid flow path 311 through which ink, which is a liquid, passes, and a cartridge mounting portion 312 on which the ink cartridge 20 is mounted is provided on one surface where the liquid flow path 311 opens. Yes. In the present embodiment, four ink cartridges 20 are mounted on the cartridge mounting portion 312.

  The cartridge mounting portion 312 is surrounded by a wall portion 313, and a first engagement hole 314 penetrating in the thickness direction is provided on one wall surface of a pair of opposite wall surfaces of the wall portion 313. ing. Further, a second engagement hole 315 penetrating in the thickness direction is provided on the other wall surface opposite to the wall surface provided with the first engagement hole 314.

  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, four attachment portions 316 are also provided. The attachment portion 316 has a cylindrical shape provided with a liquid channel 311 that opens to the tip surface, and a filter that covers the opening of the liquid channel 311 on the protruding tip surface that the liquid channel 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 attachment portion 316 (the opening surface where the liquid flow path 311 opens). That is, the peripheral edge portion of the filter 317 is provided up to substantially the same position as the peripheral edge portion of the attachment portion 316.

  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 FIG. FIG. 3 is a perspective view showing the seal member.

  As shown in FIG. 3, the seal member 330 is made of a flexible material such as rubber or elastomer, and includes a flat plate-like first seal portion 331, a cylindrical second seal portion 332, and a second seal member 330. A cylindrical third seal portion 333 having a larger inner diameter than the seal portion 332.

  The second seal portion 332 has a cylindrical shape that fits around the attachment portion 316. The third seal portion 333 has a cylindrical shape having an inner diameter larger than that of the second seal portion 332. The first seal portion 331 is provided with a through hole 335 that is integrally connected to one end portion of the second seal portion 332 and communicates with the inside of the second seal portion 332. The first seal portion 331 is integrally connected to one end portion of the third seal portion 333 on the outer periphery. That is, the seal member 330 has a C-shape that opens toward the flow path member main body 310 side.

  In the present embodiment, the second seal portion 332 has an inner diameter that is close to the outer periphery of the attachment portion 316. The third seal portion 333 has an outer diameter slightly smaller than the groove provided around the attachment portion 316.

  Here, the third seal portion 333 is provided with a slit-like communication passage 334 that penetrates in the thickness direction (surface direction of the first seal portion 331).

  In the present embodiment, when the communication path 334 is attached to the flow path member main body, a position on the second engagement hole 315 side to be engaged with a second engagement claw 25 of the ink cartridge 20 described later in detail. Is provided. Of course, the position of the communication path 334 is not particularly limited, and may be any position of the third seal portion 333.

  Such a communication path 334 is closed when not pressed by the ink cartridge 20, and is opened by being bent and deformed when the seal member 330 is pressed by the ink cartridge 20. Specifically, the communication path 334 is cut by the third seal portion 333 from the side continuous with the first seal portion 331 toward the side opposite to the first seal portion 331 (the channel member main body 310 side). It has a cut shape. Accordingly, when the ink cartridge 20 comes into contact with the first seal portion 331 and the first seal portion 331 is bent and deformed so as to be convex toward the flow path member main body 310 by the ink cartridge 20, the third seal portion 333 is formed. At the same time, the height is reduced toward the flow path member main body 310 side, thereby opening.

  The first seal portion 331 is provided with a through hole 335 that penetrates in the thickness direction. The through hole 335 is provided at a position on the inner side (on the second seal portion 332 side) than the region of the first seal portion 331 with which the ink cartridge 20 abuts. By this through hole 335, the space around the attachment portion 316 and the space inside the seal member 330 attached to the flow path member main body 310 (the flow path member main body 310, the first seal portion 331, the second seal portion 332, and the like) A space defined by the third seal portion 333 communicates with each other to form a sealed space 336.

  Such a seal member 330 is fitted and attached to the outer periphery of the attachment portion 316. At this time, the first seal portion 331 is supported by the upper end of the second seal portion 332 (the end portion on the ink cartridge 20 side) and the upper end of the third seal portion 333, and thus the first seal portion 331 is supported by the ink cartridge 20. Due to the pressing, the second seal portion 332 and the third seal portion 333 are easily bent and deformed so as to be convex toward the flow path member main body 310 side.

  Here, the ink cartridge 20 attached to and detached from the flow path member 30 has a hollow box shape in which ink (liquid) is stored inside, as shown in FIGS.

  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 flow 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.

  Further, 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 side opposite to the first engagement claw 24. And a second engagement claw 25 to be 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.

  Here, a method of mounting the ink cartridge 20 on the flow path member 30 will be described in detail with reference to FIGS. 4 and 5 are cross-sectional views showing a method of mounting the ink cartridge according to Embodiment 1 of the present invention on the flow path member, and FIG. 6 is an enlarged view of the main part of FIG. FIG. 7 is a side view showing a state of the seal member.

  First, as shown in FIG. 4A, 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.

  As a result, as shown in FIG. 6A, the rib 21 of the ink cartridge 20 comes into contact with the seal member 330 on the first engagement hole 314 side.

  Moreover, as shown to Fig.7 (a), since the side in which the communicating path 334 of the sealing member 330 was provided is not pressed, the communicating path 334 will be in the closed state.

  Next, as shown in FIG. 4B, the ink cartridge 20 is rotated with the first engagement claw 24 as a fulcrum with the first engagement claw 24 of the ink cartridge 20 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.

  In this embodiment, the ink cartridge 20 is further attached to the inside of the wall portion 313, that is, the head main body 40, from the state where the second engagement claw 25 is inserted into the second engagement hole 315. Press to the surface side.

  6B, the rib 21 of the ink cartridge 20 contacts the first seal portion 331 of the seal member 330, and the first seal portion 331 has the second seal portion 332 and the third seal portion 333. The inside of the rib 21 is sealed by bending and deforming so as to be convex toward the flow path member main body 310 side.

  At this time, as shown in FIG. 7B, the communication path 334 provided in the third seal portion 333 is opened by the third seal portion 333 contracting in the surface direction by pressing the ink cartridge 20.

  Here, the space defined by the seal member 330 and the ink cartridge 20 around the mounting portion 316 of the flow path member main body 310 is inside the seal member 330 through the through hole 335 of the seal member 330, that is, the flow. The path member main body 310, the first seal portion 331, the second seal portion 332, and the third seal portion 333 communicate with the space, and the two communicated spaces are sealed spaces 336 around the attachment portion 316. It has become. For this reason, the sealing space 336 defined by the seal member 330 and the ink cartridge 20 around the mounting portion 316 of the flow path member main body 310 communicates with the outside when the communication path 334 is opened. When the communication path 334 is opened, the seal member 330 is pressed by the ink cartridge 20, and the space inside the seal member 330, that is, the volume of the sealing space 336 is reduced. The excess fluid (air) due to the decrease in the volume of the sealed space 336 by communicating with the air is discharged to the outside.

  In the present embodiment, as described above, since the third seal portion 333 has an outer diameter slightly smaller than the groove provided around the attachment portion 316, the outer periphery of the third seal portion 333 is the attachment portion. A slight gap is provided between the wall of the groove provided around 316. For this reason, when the communication passage 334 of the third seal portion 333 is opened, the groove wall around the mounting portion 316 does not block the communication passage 334, and when the communication passage 334 is opened, the sealing space 336 and It is possible to reliably communicate with the outside via the communication path 334 and reliably discharge the fluid in the sealed space 336 to the outside.

  Next, as shown in FIGS. 5 and 6C, the ink cartridge 20 is separated from the attachment portion 316 by the reaction force (elastic force) of the seal member 330 by releasing the force pushing the ink cartridge 20. Move in the direction. At this time, the second engagement claw 25 that has been elastically deformed by being pressed by the wall portion 313 of the flow path member main body 310 is inserted into the second engagement hole 315 by an elastic force to return to the original state. Then, due to the reaction force of the seal member 330 and the elastic force of the second engagement claw 25, the second engagement claw 25 comes into contact with the wall portion on the opposite side of the mounting portion 316 of the second engagement hole 315. Thus, the ink cartridge 20 is fixed to the cartridge mounting portion 312 of the flow path member 30.

  The state of the seal member 330 at this time will be described in more detail. By releasing the force pushing the ink cartridge 20, the ink cartridge 20 is opposite to the mounting portion 316 by the reaction force (elastic force) of the seal member 330. As shown in FIG. 7C, when the pressing force of the ink cartridge 20 that presses the seal member 330 is weakened, the third seal portion 333 is extended and the communication path 334 is closed.

  The communication passage 33 is thus closed before the second engagement claw 25 comes into contact with the wall portion of the second engagement hole 315.

  Further, when the ink cartridge 20 moves in the direction opposite to the attachment portion 316, the second engagement claw 25 of the ink cartridge 20 comes into contact with the wall portion of the second engagement hole 315, and the ink cartridge 20 is It is fixed to the cartridge mounting part 312 of the flow path member 30. At this time, as shown in FIG. 7D, the force with which the ink cartridge 20 presses the seal member 330 is further smaller than that in the state shown in FIG. 7C, and the deformation amount of the seal member 330 is reduced ( The original state is set to zero deformation). That is, when the force with which the ink cartridge 20 presses the seal member 330 is weakened, the deformation amount of the first seal portion 331 deformed in a convex shape toward the flow path member main body 310 is reduced. Thereby, the internal volume of the seal member 330 is increased, and the volume of the sealed space 336 is increased. However, since the communication path 334 is kept closed from the state of FIG. 7C to the state of FIG. 7D, even if the volume of the sealed space 336 increases, fluid (air) is externally supplied. There is no invasion. Therefore, the sealed space 336 has a negative pressure (a pressure that is weaker than the external atmospheric pressure).

  As described above, in this embodiment, simply by mounting the ink cartridge 20 on the flow path member 30, the communication path 334 provided in the seal member 330 opens and closes, and the ink around the attachment portion 316 of the flow path member main body 310 is opened and closed. The fluid (air) in the sealed space 336 defined by the cartridge 20 and the seal member 330 can be discharged to a negative pressure. That is, in this embodiment, the communication path 334 provided in the seal member 330 functions as a communication path that connects the sealed space 336 and the outside, and the seal member 330 that opens and closes the communication path 334 is in the sealed space 336. It functions as a discharge means for discharging the fluid.

  Therefore, there is no need to provide a fluid (air) discharge path communicating with the sealing space 336 in the ink cartridge 20, the flow path member main body 310, etc., and the structure can be simplified and the flow path member 30 can be downsized. As well as cost.

  Since the sealed space 336 defined by the ink cartridge 20 and the seal member 330 around the attachment portion 316 can be set to a negative pressure in this way, the gas contained in the ink (liquid) is filtered by the filter 317. If the bubbles are secured on the top, the bubbles secured on the filter 317 can be discharged into the sealed space 336. That is, even if the gas contained in the ink is ensured as bubbles on the filter 317, the bubbles can be discharged without retaining the bubbles on the filter 317. It is possible to suppress the occurrence of an ink ejection defect due to a decrease in the effective area 317 and an increase in flow path resistance.

  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.

(Other embodiments)
As mentioned above, although one Embodiment of this invention was described, the basic composition of this invention is not limited to what was mentioned above. For example, in the first embodiment described above, the communication path 334 that opens and closes when the ink cartridge 20 is attached to the seal member 330 is provided as a discharge means for discharging the fluid in the sealing space 336 to the outside. Without being limited thereto, the communication path 334 is always opened to communicate with the outside, and the fluid in the sealed space 336 can be discharged to the outside through this opening, so that the outside fluid cannot enter the sealed space 336. A stop valve may be provided. Of course, a check valve that communicates with the sealed space 336, a suction pump that sucks the fluid in the sealed space 336, and the like may be provided in the flow path member main body 310, the ink cartridge 20, and the like as discharge means.

  In the first embodiment described above, the seal member 330 is exemplified by a hollow member that is open on one surface, which includes the first seal portion 331, the second seal portion 332, and the third seal portion 333. For example, a solid member may be used as the seal member, and the shape thereof is not particularly limited.

  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 and the like, and is mounted on the ink jet recording apparatus. FIG. 8 is a schematic view showing an example of the ink jet recording apparatus.

  In the ink jet recording apparatus I shown in FIG. 8, a plurality of ink jet recording heads 10 are provided with an ink cartridge 20 constituting an ink supply means in a detachable manner, 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 storage means in which ink is stored, 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-shaped 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 storing means), 23 supply unit, 30 flow path member, 40 head main body, 310 flow path member main body, 311 Liquid channel, 312 Cartridge mounting part, 316 Mounting part, 330 Seal member, 331 First seal part, 332 Second seal part, 333 Third seal part, 334 Communication path, 335 Through hole, 336 Sealing space

Claims (5)

A flow path member main body provided with a liquid flow path for supplying a liquid to the head main body for ejecting the liquid, and provided with a mounting portion to which a liquid supply means for supplying the liquid is attached to one opening of the liquid flow path;
A filter attached to the attachment portion and covering an opening of the liquid flow path;
A seal member provided around the mounting portion of the flow path member main body and formed of an elastic material,
The sealing space defined by the liquid supply means and the seal member around the mounting portion of the flow path member main body is communicated to the outside via a communication path.
A flow path member, characterized in that a discharge means capable of discharging the fluid in the sealed space to the outside is provided in the communication path.   The communication path is a slit provided in the seal member to communicate the sealed space and the outside, and the seal member is pressed by the liquid supply means to open the slit, and the seal member is counteracted. The flow path member according to claim 1, wherein the flow path member functions as the discharge unit that closes the slit by returning to the original state by force.   A liquid jet head comprising the flow path member according to claim 1.   A liquid ejecting apparatus comprising the liquid ejecting head according to claim 3.   A liquid ejecting apparatus comprising the flow path member according to claim 1.

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