JP5950081B2 - Liquid ejecting head and liquid ejecting apparatus - Google Patents

Description

  The present invention relates to a liquid ejecting head and a liquid ejecting apparatus that eject liquid, and more particularly, to an ink jet recording head and an ink jet recording apparatus that eject ink as liquid.

  In an ink jet recording head, which is a typical example of a liquid ejecting head, ink is generally supplied from a liquid storage unit such as an ink cartridge filled with ink to the head main body. The ink is ejected as ink droplets from the nozzle openings by driving a pressure generating means such as a heating element.

  In such an ink jet recording head, if bubbles that are present in the ink or bubbles that are mixed in the ink when the liquid storage means is attached or detached are supplied to the ink jet recording head, such as dot dropout due to the air bubbles. There is a problem that defective discharge occurs. In order to solve such problems, a filter for removing bubbles and foreign matter in the ink is installed in the liquid flow path between the ink supply needle, the cartridge, and the ink jet recording head that is inserted into the ink cartridge. There is something to do.

  By providing a filter in the middle of the liquid flow path in this way, it is possible to prevent bubbles from flowing into the head body, but it is difficult to discharge bubbles accumulated in the filter chamber, which is the space upstream of the filter. There is.

  For this reason, there has been proposed one in which a wall formed of an elastic body that is deformed so as to be close to and away from the filter opposite to the filter is provided in the filter chamber (see, for example, Patent Documents 1 and 2). .

JP 2000-296622 A JP 2010-201829 A

  However, in order to fill the ink in the ink jet recording head when replacing the liquid storage means, a suction means for sucking ink from the nozzle openings is required, and an expensive and large-sized one having a high suction force as the suction means There is a problem that is necessary.

  Such a problem exists not only in the ink jet recording head but also in a liquid ejecting head that ejects liquid other than ink.

  In view of such circumstances, the present invention can reliably fill the liquid in a short time when replacing the liquid storage means without requiring a suction means having a high suction force, and can reduce the cost. It is an object to provide a liquid ejecting head and a liquid ejecting apparatus that can be reduced in size.

An aspect of the present invention that solves the above problems includes a head body that ejects liquid from a nozzle opening and a liquid channel that supplies the liquid to the head body, and a filter is disposed in the middle of the liquid channel. And a choke means for opening and closing the liquid channel upstream of the filter chamber, wherein the filter chamber is provided, and a region of the filter chamber facing the filter is formed of an elastic member. And a pressing means for pressing the elastic member toward the filter, wherein the filter chamber has a dome shape protruding to the opposite side of the filter, and the choke means passes the liquid flow path. After the blocking, the pressing means presses the elastic member, and when the blocking of the liquid flow path by the choke means is released, the pressing means releases the pressing of the elastic member, and the front And pressing means, in the liquid ejecting head is characterized in that the choke means is interlocked.
In such an aspect, the liquid in the liquid storage means can be supplied into the liquid ejecting head in a short time by merely operating the pressing means and the choke means without requiring a suction means having a high suction force. When the liquid storage means is exchanged, the liquid can be reliably filled in a short time, and the cost can be reduced and the size can be reduced. Further, by linking the pressing means and the choke means, it is not necessary to control the control circuit or the like, and the cost can be reduced.
Here, the pressing means includes a pressing cam that is an eccentric cam, the choke means includes a choke cam that is an eccentric cam, and the interlocking between the pressing means and the choke means is the rotation of the pressing cam and the It is preferable to interlock with the rotation of the choke cam. According to this, by pressing the rotation of the pressing cam and the choke cam, the pressing and choking can be performed at a desired timing without requiring control of a control circuit or the like.
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 reduced in size and cost.
It is preferable that the apparatus further includes a suction unit that sucks liquid from the nozzle opening of the liquid ejecting head. According to this, by linking the suction operation by the suction means with one or both of the pressing means and the choke means, a large suction force is not required at the time of cleaning by the suction means, and the suction means is small and low cost. Things can be used.
Furthermore, another aspect of the present invention includes a head body that ejects liquid from a nozzle opening and a liquid channel that supplies the liquid to the head body, and a filter is disposed in the middle of the liquid channel. A liquid ejecting head having a flow path member in which a region opposite to the filter of the filter chamber is formed of an elastic member, and the liquid flow path upstream of the filter chamber or Choke means for opening and closing a flow path for supplying liquid to the liquid flow path, and pressing means for pressing the elastic member toward the filter, and the filter chamber projects to the opposite side of the filter After the choke means closes the liquid flow path, the pressing means presses the elastic member, and the liquid flow path is blocked by the choke means. Is Once, the pressing means releases the pressing of the elastic member, and said pressing means is a liquid-jet apparatus characterized by said choke means interlocked.
In such an aspect, the liquid in the liquid storage means can be supplied into the liquid ejecting head in a short time by merely operating the pressing means and the choke means without requiring a suction means having a high suction force. When the liquid storage means is exchanged, the liquid can be reliably filled in a short time, and the cost can be reduced and the size can be reduced. Further, by linking the pressing means and the choke means, it is not necessary to control the control circuit or the like, and the cost can be reduced.
Another aspect includes a head body that ejects liquid from a nozzle opening, and a liquid channel that supplies the liquid to the head body, and a filter is disposed in the middle of the liquid channel. A channel member in which a region facing the filter of the filter chamber is formed of an elastic member, choke means for opening and closing the liquid channel upstream of the filter chamber, and the elastic member Pressing means for pressing the member toward the filter, and after the choke means closes the liquid channel, the pressing means presses the elastic member, and the choke means In the liquid ejecting head, the pressing unit releases the pressing of the elastic member when the blockage is released.
In such an aspect, the liquid in the liquid storage means can be supplied into the liquid ejecting head in a short time by merely operating the pressing means and the choke means without requiring a suction means having a high suction force. When the liquid storage means is exchanged, the liquid can be reliably filled in a short time, and the cost can be reduced and the size can be reduced.

  Here, it is preferable that the filter chamber has a dome shape protruding to the opposite side of the filter. According to this, the wall portion defining the filter chamber can be efficiently elastically deformed toward the filter side and can be easily returned to the direction away from the filter.

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 reduced in size and cost.

  It is preferable that the apparatus further includes a suction unit that sucks liquid from the nozzle opening of the liquid ejecting head. According to this, by linking the suction operation by the suction means with one or both of the pressing means and the choke means, a large suction force is not required at the time of cleaning by the suction means, and the suction means is small and low cost. Things can be used.

Furthermore, another aspect of the present invention includes a head body that ejects liquid from a nozzle opening and a liquid channel that supplies the liquid to the head body, and a filter is disposed in the middle of the liquid channel. A liquid ejecting head having a flow path member in which a region opposite to the filter of the filter chamber is formed of an elastic member, and the liquid flow path upstream of the filter chamber or Choke means for opening and closing a flow path for supplying liquid to the liquid flow path, and pressing means for pressing the elastic member toward the filter, and after the choke means closes the liquid flow path, When the pressing means presses the elastic member, and the blocking of the liquid flow path by the choke means is released, the pressing means releases the pressing of the elastic member. Cum in the apparatus.
In such an aspect, the liquid in the liquid storage means can be supplied into the liquid ejecting head in a short time by merely operating the pressing means and the choke means without requiring a suction means having a high suction force. When the liquid storage means is exchanged, the liquid can be reliably filled in a short time, and the cost can be reduced and the size can be reduced.

1 is a schematic perspective view of a recording apparatus according to Embodiment 1. FIG. 3 is a perspective view of a recording head according to Embodiment 1. FIG. 2A and 2B are a top view and a bottom 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. FIG. 3 is a cross-sectional view of the recording head according to the first embodiment. FIG. 3 is a perspective view illustrating a recording head and a pressing unit according to the first embodiment. FIG. 5 is a cross-sectional view illustrating the operation of the pressing unit according to the first embodiment. 3 is a flowchart illustrating the operation of a pressing unit and the like according to Embodiment 1. FIG. 6 is a top view and a side view of a liquid jet head according to a second embodiment. It is a side view which shows operation | movement of the press means etc. which concern on Embodiment 2. FIG. It is a principal part top view which shows the modification of the press means etc. which concern on Embodiment 2. FIG. FIG. 10 is a schematic perspective view of a recording apparatus according to a third embodiment. It is a side view which shows operation | movement of the press means which concerns on Embodiment 3. It is a top view which shows operation | movement of the press means concerning Embodiment 3. It is principal part sectional drawing of the recording head which concerns on other embodiment. It is principal part sectional drawing of the recording head which concerns on other embodiment.

Hereinafter, the present invention will be described in detail based on embodiments.
(Embodiment 1)
FIG. 1 is a schematic perspective view illustrating an ink jet recording apparatus which is an example of a liquid ejecting apparatus according to Embodiment 1 of the invention.

  As shown in FIG. 1, in this embodiment, ink from the liquid storage unit 1 in which liquid ink is stored is supplied to an ink jet recording head 3 which is an example of a liquid ejecting head mounted on a carriage 2. 4 is supplied.

  The carriage 2 on which such an ink jet recording head 3 is mounted is provided so as to be movable in the axial direction of a carriage shaft 2 a attached to the apparatus main body 7.

  The driving force of the driving motor 8 is transmitted to the carriage 2 through a plurality of gears and timing belt 8a (not shown), so that the carriage 2 on which the ink jet recording head 3 is mounted is moved along the carriage shaft 2a. On the other hand, the apparatus body 7 is provided with a platen 9 along the carriage shaft 2a, and a recording sheet S, which is a recording medium such as paper fed by a not-shown paper feed roller, is wound around the platen 9. It is designed to be transported.

  In such an ink jet recording apparatus I, the carriage 2 is moved along the carriage shaft 2 a and ink droplets are ejected from the ink jet recording head 3 to be printed on the recording sheet S.

  In the ink jet recording apparatus I, suction is performed by sucking ink from a nozzle opening of the ink jet recording head 3 into a non-printing area on the side of the platen 9 that is an end in the moving direction of the carriage 2. Means 10 are provided.

  The suction means 10 abuts the edge of the suction port of the cap member 11 formed of rubber or the like on the liquid ejection surface from which the ink droplets of the inkjet recording head 3 are ejected, and performs a suction operation on the suction device 12 such as a suction pump. As a result, the inside of the cap member 11 is set to a negative pressure, and the ink in the liquid flow path of the ink jet recording head 3 is sucked together with bubbles from the nozzle opening to perform a suction operation. The cap member 11 also has a role of covering the nozzles at a timing other than the suction operation, for example, at the time of power-off, standby, or regular timing, and preventing thickening due to drying of ink near the nozzles.

  Further, in the ink jet recording apparatus I, a pressing unit 50 is provided in a non-printing area on the side of the platen 9 that is an end in the moving direction of the carriage 2.

  In the present embodiment, the pressing unit 50 is provided in the same non-printing area where the suction unit 10 is provided.

  In such an ink jet recording apparatus I, the liquid storage means 1 such as an ink tank in which ink is stored is fixed to the apparatus main body 7, and the liquid storage means 1 and the ink jet recording head 3 supply a flexible tube or the like. Connected via the tube 4. A choke means 5 such as a valve for opening and closing a flow path inside the supply pipe 4 (flow path for supplying ink to the liquid flow path of the ink jet recording head 3) is provided in the supply pipe 4. ing.

  The choke means 5 closes and opens the flow path inside the supply pipe 4 at a predetermined timing. In the present embodiment, the choke means 5 is provided in the middle of the supply pipe 4. However, the present invention is not limited to this. For example, a liquid channel is provided in the middle of the liquid channel of the ink jet recording head 3 to be described later. Choke means for closing and opening may be provided.

  Here, the ink jet recording head 3 mounted on the ink jet recording apparatus I as described above will be described. 2 is a perspective view of the ink jet recording head according to the first embodiment of the present invention, FIG. 3 is a top view and a bottom view of the ink jet recording head, and FIG. 4 is A in FIG. FIG. 5 is a cross-sectional view taken along line -A ′, and FIG. 5 is a cross-sectional view taken along line BB ′ and CC ′ in FIG.

  As shown in the figure, the ink jet recording head 3 is connected to the liquid storage means 1 via a supply pipe 4 (see FIG. 1), and a flow path member 20 to which ink from the liquid storage means 1 is supplied, A head body 40 that is fixed to the path member 20 and is supplied with ink from the channel member 20 and ejects ink as ink droplets.

  The head main body 40 includes a liquid ejecting surface 42 having a nozzle opening 41 for ejecting ink, which is a liquid, as ink droplets, on the side opposite to the surface fixed to the flow path member 20. In addition, inside the head main body 40 (not shown), there are a liquid channel that communicates with the nozzle opening 41 and communicates with the channel of the channel member 20, a pressure generating unit that causes a pressure change in the ink in the liquid channel, and the like. Is provided. 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, and the ink from the nozzle opening 41. A device that discharges droplets, a heater element disposed in the liquid flow path, and a device that discharges ink droplets from the nozzle openings 41 by bubbles generated by the heat generated by the heater element, or an electrostatic force between the diaphragm and the electrode For example, a so-called electrostatic actuator that discharges ink droplets from the nozzle openings 41 by deforming the vibration plate by electrostatic force can be used.

  In the present embodiment, four nozzle rows in which the nozzle openings 41 are arranged in the second direction Y in the head body 40 are arranged in parallel in the first direction X orthogonal to the second direction Y, and each nozzle row Different inks were ejected.

  The flow path member 20 for supplying ink to the head main body 40 has a flow path member main body 21 to which the head main body 40 is fixed, and an elastic member fixed to the surface of the flow path member main body 21 opposite to the head main body 40. And a member 22.

  The flow path member main body 21 is formed of a material having a higher hardness than the elastic member 22, for example, a metal or a resin. In the present embodiment, for example, the flow path member main body 21 can be formed at low cost by molding a resin material.

  The elastic member 22 is made of an elastically deformable material such as rubber or elastomer. Here, the elastically deformable material means a material that can be elastically deformed so that a second wall portion defining a filter chamber, which will be described later, is close to or away from the filter side.

  A liquid channel 100 is provided in the channel member 20 constituted by the channel member main body 21 and the elastic member 22. In the present embodiment, since four nozzle rows for ejecting different inks are provided in the head main body 40, the flow channel member 20 is provided with four independent liquid flow channels 100 for supplying different inks. Yes.

  One end of the liquid channel 100 opens into the elastic member 22 on the opposite surface to the surface on which the head main body 40 is fixed, and the supply pipe 4 connected to the liquid storage means 1 is connected thereto. The other end of the liquid channel 100 opens to the head body 40 side and communicates with a liquid channel (not shown) inside the head body 40.

  Here, the liquid channel 100 includes a connection port 101 to which the supply pipe 4 is connected, a first channel 102 that communicates with the connection port 101, a filter chamber 103 that communicates with the first channel 102, and a filter chamber 103. And a second flow path 104 that communicates with a liquid flow path (not shown) inside the head body 40.

  The connection port 101 is provided through the elastic member 22 in the thickness direction (the direction Z in which the elastic member 22 and the flow path member main body 21 are stacked).

  The first flow path 102 and the filter chamber 103 are provided at the boundary between the flow path member main body 21 and the elastic member 22 as shown in FIG. Specifically, the first flow path 102 includes a groove provided in a concave shape on the surface side fixed to the flow path member main body 21 of the elastic member 22 and a plane of the flow path member main body 21 that seals the groove. (Surface on which the elastic member 22 is fixed). That is, the first flow path 102 has three surfaces defined by the elastic member 22, and a cross section in which one surface is defined by the flow path member main body 21 has a rectangular shape. The cross section of the first flow path referred to here is a cross section in a direction orthogonal to the ink flowing direction. Of course, the shape of the first flow path 102 is not limited to a shape having a rectangular cross section, and may have a cross section such as a circular shape, an elliptical shape, or a polygonal shape.

In the present embodiment, the partition wall facing the partition wall defined by the channel member main body 21 of the first channel 102 is referred to as a first wall portion 24. A direction (hereinafter simply referred to as a flow direction) of ink flowing through the first flow path 102 (hereinafter also simply referred to as a first direction X) within the surface of the flow path member body 21 to which the elastic member 22 is fixed. the width of the second referred to as direction Y) first wall portion 24 of the referred to as a first width W _1. That is, the first width W ₁ of the first wall portion 24 in the second direction Y is the width of the first flow path 102 in the second direction Y.

  The filter chamber 103 is defined by a recess formed on the flow path member main body 21 side of the elastic member 22 and a surface of the flow path member main body 21 on the elastic member 22 side. The filter chamber 103 is formed so as to be wider in the second direction Y than the first flow path 102.

  Note that the filter chamber 103 is also provided in the first direction X so as to be wider than the width of the first flow path 102 in the second direction Y.

  Further, the four filter chambers 103 are arranged in parallel in the second direction Y on the flow path member main body 21. Incidentally, the filter chambers 103 that are adjacent to each other in the second direction Y are arranged at positions that partially overlap in the first direction X.

  Inside the filter chamber 103 is provided a filter 25 for removing foreign substances and bubbles contained in the ink. In the present embodiment, the filter 25 is fixed to an opening surface where the second flow path 104 of the flow path member main body 21 opens, that is, a surface to which the elastic member 22 is fixed.

  In addition, as the filter 25, for example, a sheet-like one in which a plurality of fine holes are formed by finely knitting fibers such as metal or resin, or a plurality of fine holes are made to penetrate a plate-like member such as metal or resin. Can be used. In addition, the filter 25 may use a nonwoven fabric etc., The material is not specifically limited.

  A second wall portion 26 that is elastically deformable and is formed by the elastic member 22 is provided in a region of the filter chamber 103 that faces the filter 25. In the present embodiment, the second wall portion 26 is provided on the side opposite to the filter 25 so as to protrude in a dome shape (semicircular shape) from the periphery (other region of the elastic member). The dome shape here refers to a shape in which the amount of protrusion gradually increases from the periphery toward the center. Moreover, the 2nd wall part 26 is arrange | positioned in the position which covers a slightly larger area than the filter 25, and completely covers the filter 25 which opposes in this embodiment.

The second wall 26 defining such a filter chamber 103 flows in the first flow path 102 in the width in the second direction Y, that is, in the plane to which the elastic member 22 of the flow path member main body 21 is fixed. The width (second width W ₂ ) in the direction (second direction Y) perpendicular to the ink flow direction (first direction X) is wider than the first width W ₁ of the first wall portion 24. It is provided to become.

  Further, the thickness (direction Z) of the second wall portion 26 that defines the filter chamber 103 is thinner than the thickness of the first wall portion 24 that defines the first flow path 102.

Thus, the width W ₂ of the second wall portion 26 that defines the filter chamber 103 is made wider than the width W ₁ of the first wall portion 24, and the thickness of the second wall portion 26 is set to the first wall portion 24. By making it thinner, the rigidity of the second wall portion 26 that defines the filter chamber 103 is lower than that of the first wall portion 24 that defines the first flow path 102. That is, in the present embodiment, the second wall portion 26 is formed by the walls on both sides by providing the second width W ₂ of the second wall portion 26 wider than the first width W ₁ of the first wall portion 24. The supported distance is shortened by the first wall portion 24. For this reason, the 2nd wall part 26 has low rigidity compared with the 1st wall part 24, ie, it is easy to elastically deform toward the filter 25 side. Further, by making the thickness of the second wall portion 26 thinner than that of the first wall portion 24, the second wall portion 26 has lower rigidity than the first wall portion 24, that is, elastic toward the filter 25 side. It is easy to deform. Here, the rigidity means the degree of difficulty of dimensional change (deformation) with respect to force, and is expressed by force (load / deformation amount) necessary for causing unit deformation. In particular, in the present embodiment, the approximate center of the first wall portion 24 and the approximate center of the second wall portion 26 are compared.

  The second flow path 104 is provided so as to penetrate the flow path member main body 21 in the thickness direction (the direction Z in which the flow path member main body 21 and the elastic member 22 are stacked), and one end of the second flow path 104 is provided. 21 is opened to a surface to which the elastic member 22 is fixed and communicates with the filter chamber 103, and the other end is opened to the surface opposite to the surface to which the elastic member 22 of the flow path member main body 21 is fixed. It communicates with a flow path (not shown) inside.

  In such an ink jet recording head 3, the ink from the liquid storage unit 1 is supplied to the flow path member 20 through the supply pipe 4, and the connection port 101, the first flow path 102, and the filter chamber 103 of the flow path member 20. Then, the liquid passes through the liquid channel 100 including the second channel 104 and is supplied to the head body 40. Then, after filling the liquid flow path inside the head main body 40 with the ink to reach the nozzle opening 41, an ink droplet is ejected from the nozzle opening 41 by driving the pressure generating means according to the recording signal from the outside.

  In the present embodiment, such an ink jet recording head 3 is mounted on the ink jet recording apparatus I so that the first direction X is the moving direction of the carriage 2.

  Further, the second wall portion 26 formed by the elastic member 22 of the ink jet recording head 3 is pressed by the pressing means 50 at a predetermined timing.

  Here, the pressing means 50 will be described with reference to FIG. 1, FIG. 6, and FIG. 6 is a perspective view showing the pressing means and the ink jet recording head according to the first embodiment of the present invention, and FIG. 7 corresponds to the BB ′ line in FIG. 3 showing the pressing state by the pressing means. FIG.

  As shown in FIG. 1, the pressing means 50 moves relative to the flow path member 20 of the ink jet recording head 3 when the ink jet recording head 3 moves to the non printing area of the ink jet recording apparatus I. It is fixed to the apparatus main body 7 so as to be in a facing position.

  As shown in FIG. 6, the pressing unit 50 includes a plurality of pressing pins 51 and a driving unit 52 that holds the base end side of the plurality of pressing pins 51.

  Four pressing pins 51 are provided corresponding to the number of liquid channels 100 of the channel member 20. Each pressing pin 51 is provided opposite to the second wall portion 26 whose tip surface defines the filter chamber 103.

  The drive means 52 moves the four pressing pins 51 independently in the axial direction (Z direction). As such a driving means 52, for example, a device capable of moving the pressing pin 51 by using a driving motor or an electromagnet as a driving force can be used.

  According to such a pressing means 50, as shown in FIG. 7A, the pressing pin 51 of the pressing means 50 does not press the second wall portion 26 as shown in FIG. 7B. When the pressing pin 51 of the pressing means 50 presses the second wall portion 26, the second wall portion 26 is elastically deformed toward the filter 25 to reduce the volume of the filter chamber 103. Further, the second wall portion 26 that has been elastically deformed so as to be close to the filter 25 side by the pressing means 50 releasing the pressing of the second wall portion 26 by the pressing pin 51 is usually caused by its own elastic force. In other words, the state returns to the state separated from the filter 25 as shown in FIG.

  The volume change that increases or decreases the volume of the filter chamber 103 by the pressing means 50 is linked with the closing and opening of the flow path by the choke means 5 so that ink is supplied from the liquid storage means 1 side to the nozzle opening 41 side. be able to.

  Here, the operation of the pressing means 50 and the choke means 5 will be described. FIG. 8 is a flowchart showing the operation of the pressing means and the choke means.

  In order to supply ink, first, in step S1, the choke means 5 supplies the liquid to the flow path of the supply pipe 4 (the first flow path 102, which is the liquid flow path 100 upstream of the filter chamber 103). Block). Next, in step S <b> 2, the pressing unit 50 presses the second wall portion 26 to reduce the volume of the filter chamber 103. At this time, since the choke means 5 closes the flow path (the first flow path 102 side), the gas or liquid in the filter chamber 103 moves to the nozzle opening 41 side downstream of the filter chamber 103.

  Next, after the blocking of the flow path by the choke means 5 is opened (open the flow path) in step S3, the pressing of the second wall portion 26 by the pressing means 50 is released in step S4. Thereby, the 2nd wall part 26 returns to an original state with its own elastic force, and the volume of the filter chamber 103 increases. At this time, since the choke means 5 upstream of the filter chamber 103 opens (opens) the flow path, ink (liquid) on the upstream side, that is, the liquid storage means 1 side is supplied to the filter chamber 103. The Incidentally, on the head body 40 side, the filter 25 is present, and the cross-sectional area communicating with the plurality of nozzle openings 41 is branched into a small flow path, so that the flow path resistance is high. Therefore, the ink is not supplied from the nozzle opening 41 side toward the filter chamber 103 due to the increase (expansion) of the filter chamber 103, and the ink is supplied from the liquid storage means 1 side having a low flow resistance.

  Next, in step S5, it is determined whether the ink supply has been completed. If the ink supply has not been completed (step S5: No), steps S1 to S4 are repeated. If it is determined in step S5 that the ink supply has ended (step S5: Yes), the ink supply is ended.

  As described above, the ink on the liquid storage unit 1 side can be sent to the ink jet recording head 3 side by repeating Step S1 to Step S4 once or a plurality of times. That is, by opening and closing the choke means 5 and changing the volume of the filter chamber 103 by the pressing means 50 at the above timing, the choke means 5 and the pressing means 50 are moved from the liquid storage means 1 side to the nozzle opening 41 side. It functions as a pump that sends ink toward it.

  Incidentally, when only the second wall portion 26 is pressed by the pressing means 50 without providing the choke means 5, the flow resistance of the flow path on the nozzle opening 41 side downstream from the filter chamber 103 is compared with the flow path resistance as described above. Since the flow path resistance of the flow path upstream of the filter chamber 103 is low, most of the ink in the filter chamber 103 moves to the liquid storage means 1 side that is upstream, so the liquid storage means 1 side Ink cannot be supplied from the nozzle toward the nozzle opening 41 side.

  Then, by performing such steps S1 to S5, when the liquid storage unit 1 is replaced, the ink storage from the liquid storage unit 1 to the ink jet recording head 3 can be performed in a short time and useless ink. This can be done with reduced consumption.

  Incidentally, since the ink jet recording apparatus I of the present embodiment is provided with the suction means 10, the liquid storage means 1 side when the liquid storage means 1 is replaced also by the suction means 10 is transferred to the ink jet recording head 3. However, it is necessary to move the cap member 11 to bring the cap member 11 into contact with the liquid ejection surface 42 and seal it, and to perform a suction operation by the suction device 12. A relatively long time is required for the work. Further, the suction unit 10 passes the ink of the liquid storage unit 1 from the state where the flow path member 20 and the head main body 40 are not filled with ink to the nozzle opening 41 of the ink jet recording head 3 from the liquid storage unit 1. It is used for filling, so-called initial filling, and bubble discharge cleaning for sucking bubbles staying on the filter 25 together with ink from the nozzle opening 41 side. As a suction device 12 such as a suction pump, a relatively high pressure is used. A large device that can be sucked in is required. The ink filling at the time of replacement of the liquid storage means 1 is performed by ink jet recording only by supplying ink at a relatively low pressure compared to initial filling and bubble discharge cleaning (same meaning as sucking ink from the nozzle opening side). The head 3 can be sufficiently filled with ink. Therefore, if the large-sized suction device 12 that performs the initial filling or bubble discharge cleaning and can perform suction with a large negative pressure is used for ink filling when the liquid storage means 1 is replaced, wasteful consumption of ink increases. There is a risk that. In this embodiment, the choke means 5 and the pressing means 50 are operated at a predetermined timing, so that the ink filling from the replaced new liquid storage means 1 into the liquid channel 100 can be performed without using the suction means 10. It is possible to reduce the wasteful consumption of ink in a short time.

  The operation of the choke means 5 and the operation of the pressing means 50 may be controlled by, for example, a control circuit (not shown), and mechanical operations such as attachment / detachment of the liquid storage means 1 and opening / closing of the paper tray are performed. You may make it carry out by transmitting mechanically.

  Further, in the present embodiment, the pressing means 50 can individually press the second wall portions 26 of the filter chambers 103, so that the second wall portion corresponding to the liquid flow path 100 for replacing the liquid storage means 1 is used. Only 26 can be pressed to fill the ink. Therefore, wasteful ink consumption due to pressing the second wall portion 26 corresponding to the liquid channel 100 that does not require replacement of the liquid storage unit 1 can be suppressed.

  Further, in the present embodiment, the initial filling and the bubble discharge cleaning are performed by the suction unit 10, but when performing the initial filling and the bubble discharge cleaning, one or both of the choke unit 5 and the pressing unit 50 are used. It may be.

  For example, when performing the initial filling, the suction operation of sucking ink from the nozzle opening 41 by the suction means 10 is performed while the flow path is closed by the choke means 5, and the atmospheric pressure in the flow path is increased. In the state, the blocking of the flow path by the choke means 5 is released and opened. Thereby, even if it is the suction device 12 of a comparatively low pressure, the inside of a flow path can be attracted | sucked with a comparatively high pressure. For this reason, a suction device that performs suction at a relatively low pressure can be used, and the suction device 12 can be reduced in size and cost.

  In the ink jet recording head 3, bubbles mixed in the ink are trapped by the filter 25 and stay in the filter chamber 103 as bubbles. When the bubbles trapped on the filter 25 become larger, the bubbles are larger in the filter 25, the effective area through which the ink of the filter 25 passes is reduced, and the pressure loss is increased. When the pressure loss increases, an ejection failure of ink droplets from the head body 40 occurs. For this reason, it is necessary to discharge the bubbles accumulated in the filter chamber 103 to the outside at a predetermined timing. The bubbles that are retained on the filter 25 and sucked together with the ink from the nozzle opening 41 side and discharged to the outside are referred to as bubble discharge cleaning. The bubble discharge cleaning can be performed by using not only the suction unit 10 but also the choke unit 5 and the pressing unit 50, for example. For example, when suction is performed by the suction means 10, the second wall portion 26 is pressed by the pressing means 50 at the same time. Thereby, the air bubbles staying on the filter 25 are pressed against the filter 25 by the elastically deformed second wall portion 26, and the air bubbles pass through the filter 25 and are discharged to the downstream side of the second flow path 104. In this way, by pressing the second wall portion 26 by the pressing means 50 and simultaneously performing the suction by the suction means 10, the air bubbles that have passed through the filter 25 are easily discharged to the outside together with the ink from the nozzle openings 41. That is, in comparison with the case where the bubble discharging cleaning is performed only by the suction unit 10, by using the pressing unit 50 together, the bubbles on the filter 25 can be surely flowed to the downstream side and the bubbles can be discharged to the outside. In particular, although a large suction force is required for the bubbles to pass downstream of the filter 25, as described above, suction by the suction means 10 and pressing of the second wall portion 26 by the pressing means 50 are performed. For example, even if the suction pressure by the suction means 10 is lowered, the bubbles accumulated in the filter chamber 103 can be discharged to the outside by elastically deforming the second wall portion 26. Therefore, wasteful consumption of ink can be suppressed, and an inexpensive and small device that operates at a relatively low pressure can be used for the suction device 12 of the suction means 10.

  Further, if the choke means 5 closes the flow path when the second wall portion 26 is pressed by the pressing means 50, the ink may flow to the liquid storage means 1 side having a lower flow path resistance than the nozzle opening 41 side. In addition, the ink is more likely to be discharged together with the air bubbles to the second flow path 104 side downstream of the filter 25. At this time, after the choke means 5 closes the flow path, the pressing means 50 pushes the second wall portion 26 and the suction means 10 sucks the ink in the liquid flow path 100, and then the choke means 5. If the blockage of the liquid flow channel 100 is released, the ink in the liquid flow channel 100 can be sucked together with the bubbles at a relatively high pressure using the suction device 12 that sucks at a lower pressure. Therefore, the bubbles can be reliably discharged to the outside, and the suction device can be downsized to reduce the cost.

  If the choke means 5 closes the flow path when the ink jet recording apparatus I is transported, the ink in the liquid storage means 1 is supplied to the ink jet recording head 3 when the ink jet recording apparatus I is transported. And the leakage of ink from the nozzle opening 41 can be suppressed.

  In the present embodiment, the second wall portion 26 that defines the filter chamber 103 and the first wall portion 24 that defines the first flow channel 102 that is a liquid flow channel upstream of the filter chamber 103 are provided. The second wall portion 26 is formed by the elastic member 22 and has a lower rigidity than that of the first wall portion 24. For this reason, compared with the case where only the second wall portion 26 is formed of the elastic member 22 and other regions, for example, the first wall portion 24 and the like are formed of a material different from that of the elastic member 22, a single material is used. Since it can form without assembling, the number of parts can be reduced, the manufacturing cost concerning material and assembly can be reduced, and size reduction can be achieved.

  In the present embodiment, the first wall portion 24 and the second wall portion 26 are formed by the elastic member 22, but the first wall portion 24 is deformed to the flow channel member main body 21 side when pressed by the pressing means 50. It is difficult (high rigidity). Thereby, it is possible to suppress a decrease in suction force during the suction operation of the suction means 10. Incidentally, if the first wall portion 24 is elastically deformed toward the flow channel member main body 21 during the suction operation by the suction means 10, the flow channel cross section of the first flow channel 102 is reduced, and the flow resistance is increased. There is a possibility that the suction force by the means 10 is reduced, the second wall portion 26 cannot be sufficiently deformed, and the bubbles cannot be pressed by the second wall portion 26.

(Embodiment 2)
FIG. 9 is a top view and a side view of an ink jet recording head that is an example of a liquid ejecting head according to a second embodiment of the invention. FIG. 10 is a diagram illustrating an operation of the ink jet recording head according to the second embodiment. It is. 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 the drawing, the ink jet recording head 3A of the present embodiment includes a flow path member 20, a head body 40, choke means 5A, and pressing means 50A. That is, in Embodiment 1 described above, the choke means 5 and the pressing means 50 are provided in the ink jet recording apparatus I. However, in this embodiment, the choke means 5A and the pressing means 50A are provided in the ink jet recording head 3A. This is an example.

  Specifically, the flow path member 20 and the head main body 40 have the same configuration as that of the first embodiment described above.

  The pressing means 50 </ b> A includes a pressing rotary shaft 53, a pressing cam 54 that is an eccentric cam held in an eccentric state on one end side of the pressing rotating shaft 53, and a pressing cam 54 on the other end side of the pressing rotating shaft 53. And a pressing drive means 55 such as a motor provided to rotate the pressing rotary shaft 53.

  In this embodiment, the pressing cam 54 is provided across the plurality of second wall portions 26 at a position facing the second wall portion 26 of the flow path member 20. That is, in this embodiment, the pressing cam 54 has a size capable of pressing the four second wall portions 26.

  Such a pressing means 50 </ b> A rotates the pressing cam 54 by rotating the pressing rotating shaft 53 by driving the pressing driving means 55. The pressing cam 54 is arranged at a position and an eccentric amount where the second wall 26 is pressed by rotation and a state where the pressing of the second wall 26 is released.

  In addition, the pressing drive means 55 is held by the flow path member main body 21 of the flow path member 20 in the present embodiment. Of course, the pressing drive means 55 may be mounted on the carriage 2 or the like.

  In the present embodiment, one pressing cam 54 is provided for a plurality (four) of the second wall portions 26, but the present invention is not limited to this, and the pressing cam 54 is provided for each second wall portion 26. 54 may be provided. As described above, when the pressing cam 54 is provided for each second wall portion 26, the pressing driving means 55 for driving the pressing cam 54 may be provided for each pressing cam 54.

  The choke means 5 </ b> A is provided on the choke rotating shaft 61, a choke cam 62 that is an eccentric cam held in an eccentric state at one end portion of the choke rotating shaft 61, and the other end portion side of the choke rotating shaft 61. Choke drive means 63 such as a motor for rotating the choke rotary shaft 61.

  The choke cam 62 crushes the supply pipe 4 connected to the liquid flow path 100 (connection port 101) between the flow path member main body 21 and closes the flow path of the supply pipe 4. In the present embodiment, the choke cam 62 has a size capable of simultaneously closing a plurality (four in this embodiment) of the supply pipes 4.

  Further, the choke drive means 63 is held by the flow path member main body 21 of the flow path member 20 in the present embodiment. Of course, the choke drive means 63 may be mounted on the carriage 2 or the like.

  In the present embodiment, one choke cam 62 is provided for a plurality of (four) supply pipes 4. However, the present invention is not limited to this, and the choke cam 62 is provided for each supply pipe 4. It may be. In this way, when the choke cam 62 is provided for each supply pipe 4, the choke drive means 63 for driving the choke cam 62 may be provided for each choke cam 62.

  In such a choke means 5 </ b> A, the choke cam 62 rotates, thereby closing the flow path of the supply pipe 4 communicating with the liquid flow path 100 and releasing the closed flow path.

  In such an ink jet recording head 3A, ink can be supplied from the liquid storage means 1 toward the nozzle opening 41 side of the ink jet recording head 3A by the same process as in the first embodiment.

  Specifically, first, as shown in FIG. 10A, the choke cam 62 is rotated, and the supply pipe 4 is pressed between the flow path member main body 21 and the choke cam 62. Block the flow path.

  Next, as shown in FIG. 10B, in a state where the choke cam 62 closes the flow path of the supply pipe 4, the pressing cam 54 is rotated to press the second wall portion 26 toward the filter 25.

  Next, as shown in FIG. 10 (c), the choke cam 62 is rotated in a state where the pressing cam 54 presses the second wall portion 26 toward the filter 25, and the blockage of the flow path of the supply pipe 4 is released. To do.

  Thereafter, as shown in FIG. 10 (d), the choke cam 62 rotates the pressing cam 54 in a state in which the flow passage of the supply pipe 4 is opened, so that the second wall portion 26 of the pressing cam 54 is rotated. Release the pressure. Thereby, the 2nd wall part 26 returns to an original state with an own elastic force.

  As described above, in the present embodiment, even when the pressing unit 50A and the choke unit 5A are provided in the ink jet recording head 3A, the ink filling is choked when the liquid storage unit 1 is attached and detached as in the first embodiment. It can be performed in a short time by means 5A and pressing means 50A.

  In this embodiment, the pressing cam 54 and the choke cam 62 are rotated by the pressing driving means 55 and the choke driving means 63, respectively, but the present invention is not limited to this. Here, another example is shown in FIG. FIG. 11 is a plan view of an essential part showing a modification of the pressing means and choke means of the ink jet recording head according to the second embodiment of the present invention.

  As shown in FIG. 11, the pressing means 50 </ b> B includes a pressing rotary shaft 53 and a pressing cam 54 fixed to the pressing rotary shaft 53 via a pressing clutch 56.

  The choke means 5B includes a choke rotating shaft 61 and a choke cam 62 fixed to the choke rotating shaft 61 via a choke clutch 64.

  Further, an endless belt 70 is suspended between the pressing clutch 56 and the choke clutch 64. The pressing rotary shaft 53 and the choke rotating shaft 61 are provided so that the rack gear 71 is meshed with the rack gear 71 when the liquid storage means 1 (not shown) is attached to the ink jet recording apparatus I. It is arrange | positioned so that it may be mechanically pressed and moved.

  The pressing clutch 56 and the choke clutch 64 are configured such that when the pressing rotary shaft 53 and the choke rotary shaft 61 are rotated by the movement of the rack gear 71, the pressing rotary shaft 53 and the choke rotation are rotated at a predetermined timing. The rotation of the shaft 61 is transmitted to the pressing cam 54 and the choke cam 62. That is, simply by attaching the liquid storage means 1 to the ink jet recording apparatus I, the pressing and releasing of the second wall portion 26 by the pressing means 50B and the closing and opening of the flow path by the choke means 5B are repeated continuously. Done.

  Specifically, when the rack gear 71 is moved by the mounting of the liquid storage means 1, the choke cam 62 rotates as shown in FIG. 11A, and the choke cam 62 and the flow path member main body 21 are moved. The flow path is closed by pressing the supply pipe 4. Next, as shown in FIG. 11B, when the rack gear 71 further moves, the pressing cam 54 rotates while the choke cam 62 maintains the closed state of the flow path, and the second wall portion 26 is moved. By pressing toward the filter 25, the volume of the filter chamber 103 is reduced. Next, as shown in FIG. 11C, when the rack gear 71 further moves, the choke cam 62 rotates to release and close the flow path. Thereafter, as shown in FIG. 11 (d), the rack gear 71 further moves, so that the pressing cam 54 rotates while the choke cam 62 maintains the state where the flow path is closed. The pressing of the second wall portion 26 is released, and the filter chamber 103 returns to the original state (volume). That is, by mounting the liquid storage means 1, as in Embodiment 1 described above, the flow path is blocked by the choke means 5B, the second wall portion 26 is pressed by the pressing means 50B, the flow path is opened and pressed by the choke means 5B. A series of operations of releasing the pressing of the second wall portion 26 by the means 50B is performed.

  As described above, the choke means 5B and the pressing means 50B are operated at a predetermined timing based on the operation of mounting the liquid storage means 1 instead of the control of the control circuit or the like, so that the control circuit or the like becomes unnecessary. Cost can be reduced. In addition, since a control circuit or the like is not required, the liquid storage unit 1 can be replaced and ink can be filled even when the power is not supplied.

  Further, not only the mounting of the liquid storage unit 1, but the choke unit 5B and the pressing unit 50B may be operated at the above-described timing by opening and closing a paper tray or the like, for example.

(Embodiment 3)
FIG. 12 is a schematic perspective view of an ink jet recording apparatus which is an example of a liquid ejecting apparatus according to Embodiment 3 of the present invention. FIG. 13 is a side view of the ink jet recording head showing the operation of the pressing unit. FIG. 14 is a top view of the ink jet recording head showing the operation of the pressing means. In addition, the same code | symbol is attached | subjected to the member same as embodiment mentioned above, and the overlapping description is abbreviate | omitted.

  As shown in the figure, the ink jet recording apparatus I of the present embodiment is such that the carriage 2 moves in the main scanning direction as in the ink jet recording apparatus I shown in FIG.

  Further, in the ink jet recording apparatus I, a pressing unit 50C is provided in a non-printing area outside the printing area.

  The pressing means 50 </ b> C includes a plurality of fixing pins 57 fixed to the apparatus main body 7. The fixing pin 57 is arranged so that the tip thereof contacts the second wall portion 26 of the ink jet recording head 3 when the carriage 2 moves in the main scanning direction and reaches the non-printing area. Thereby, only by moving the inkjet recording head 3 to the non-printing region, the fixing pin 57 comes into contact with the second wall portion 26 and can press the second wall portion 26 toward the filter 25.

  In the present embodiment, four fixing pins 57 are provided corresponding to the four liquid flow paths 100.

  In the present embodiment, as in the first embodiment described above, the ink jet recording head 3 is mounted on the carriage 2 so that the first direction X is the moving direction of the carriage 2. Since the four filter chambers 103 of the ink jet recording head 3 are arranged in parallel in the second direction Y, the second wall portion 26 provided corresponding to the filter chamber 103 is also in the second direction. Y is juxtaposed. Accordingly, the four fixing pins 57 are each one second without pressing the second wall portion 26 pressed by the other fixing pins 57 when the second wall portion 26 is pressed by the movement of the carriage 2. Only the wall portion 26 can be pressed. Accordingly, it is possible to suppress the backflow of ink to the liquid storage means 1.

(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. Further, for example, in each of the above-described embodiments, the second width W ₂ of the second wall portion 26 is set to be equal to that of the first wall portion 24 so that the rigidity of the second wall portion 26 is lower than that of the first wall portion 24. Although it is shorter than the first width W ₁ , the second wall portion 26 is not particularly limited as long as the second wall portion 26 has lower rigidity than the first wall portion 24. For example, only a region that becomes the second wall portion 26 may be made of a material having lower rigidity than the other regions (first wall portion 24). Such an example is shown in FIG. FIG. 15 is a cross-sectional view of a main part of a flow path member according to another embodiment of the present invention, and corresponds to a cross-sectional view taken along the line AA ′ of FIG.

As shown in FIG. 15, the second wall portion 26 </ b> A has a thin-walled portion 26 a whose thickness is partially reduced on the boundary side with the surrounding flat surface. Thus, the rigidity of the second wall portion 26 </ b> A having the thin portion 26 a in part can be made lower than that of the first wall portion 24. In the example shown in FIG. 15, similarly to the first embodiment described above, the second width W ₂ of the second wall section 26A, and wider than the first width W ₁ of the first wall portion 24, further By providing the thin wall portion 26a, the second wall portion 26A can be more easily deformed than the second wall portion 26 of the first embodiment. Of course, the second width W ₂ of the second wall section 26A, even when the first of the same width as the width W ₁ of the first wall portion 24, the thickness of the second wall portion 26A is thin, the second wall portion 26A can be lower in rigidity than the first wall portion 24.

  For example, in each embodiment mentioned above, although the 2nd wall part 26 and 26A were provided in the dome shape, the shape is not specifically limited. Here, another example of the second wall portions 26 and 26A is shown in FIG. 16 is a cross-sectional view of a main part of a flow path member according to another embodiment of the present invention, and corresponds to a cross-sectional view taken along the line CC ′ of FIG.

  As shown in FIG. 16, the second wall portion 26 </ b> B is provided on the peripheral edge side, i.e., the peripheral flat region side, inclining in a direction away from the filter 25 and projecting to the opposite side of the filter 25. A portion 26b and a central portion 26c provided on the central portion side of the peripheral edge portion 26b and protruding in a dome shape on the filter 25 side.

  In such a 2nd wall part 26B, when the press means 50 and 50A-50C press the 2nd wall part 26B, as shown in FIG.16 (b), the center part 26c of the 2nd wall part 26B is a filter. It is elastically deformed so as to move to the 25 side. At this time, since the elastically deformed second wall portion 26B is biased by the peripheral edge portion 26b in a direction protruding to the opposite side of the filter 25, when the pressing by the pressing means 50, 50A to 50C is released, It is easy to return to the state shown in FIG. That is, by setting it as the shape of such a 2nd wall part 26B, the 2nd wall part 26B is easy to deform | transform into the filter 25 side by the press means 50 and 50A-50C, and the filter 25 is cancelled | released. It is easy to return to the original state on the opposite side.

  In addition, even if it is such 2nd wall part 26B, as shown in FIG. 15, it can also make it easy to elastically deform by making thickness thin over part or all.

  Further, in each of the above-described embodiments, the ink jet recording heads 3 and 3A include the flow path member 20 and the head main body 40, and the flow path member main body 21 and the elastic member 22 having the flow path member 20 as a base portion. However, the present invention is not limited to this. For example, the flow channel member main body 21 and the head main body 40 constituting the flow channel member 20 may be integrally provided. In other words, as the base portion on which the elastic member 22 is fixed to one surface, a member in which the flow path member main body 21 and the head main body 40 are integrally provided may be used.

  Further, in each of the above-described embodiments, the first flow path 102 and the filter chamber 103 are provided in the elastic member 22 in a groove shape (concave shape). However, the present invention is not particularly limited thereto, and the groove shape is formed on the flow path member main body 21 side. A (concave) first flow path 102 and a filter chamber 103 may be provided, and the groove of the flow path member main body 21 may be sealed with a flat elastic member 22. Of course, a groove may be provided in both the flow path member main body 21 and the elastic member 22, and the first flow path 102 and the filter chamber 103 may be provided at the boundary between them.

  Further, in each of the above-described embodiments, the flow path member 20 in which only the filter 25 is formed is illustrated, but a valve body that opens and closes the flow path with a predetermined pressure is provided inside the flow path member 20. Alternatively, heating means such as a heater may be provided.

  In each of the above-described embodiments, the ink jet recording heads 3 and 3A are mounted on the carriage 2 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 3A is fixed and printing is performed simply by moving a recording sheet S such as paper in the sub-scanning direction. The present invention can also be applied to an ink jet recording apparatus in which the liquid storing means 1 is mounted on the carriage 2 and the liquid storing means 1 moves in the main scanning direction together with the ink jet recording head 3.

  Furthermore, the present invention is intended for a wide range of liquid ejecting heads. For example, the present invention is used for manufacturing 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. It can also be used for an electrode material ejection head used for electrode formation such as a color material ejection head, an organic EL display, and an FED (field emission display), a bioorganic matter ejection head used for biochip production, and the like.

  DESCRIPTION OF SYMBOLS 1 Liquid storage means, 2 Carriage, 3, 3A Inkjet recording head (liquid ejecting head), 5, 5A, 5B Choke means, 10 Suction means, 20 Channel member, 21 Channel member main body, 22 Elastic member, 24 1 wall portion, 25 filter, 26, 26A, 26B second wall portion, 40 head body, 50, 50A, 50B, 50C pressing means, 100 liquid flow path, 101 connection port, 102 first flow path, 103 filter chamber, 104 Second channel

Claims (5)

A head body for ejecting liquid from the nozzle opening;
A liquid channel for supplying a liquid to the head body is provided, and a filter chamber in which a filter is disposed is provided in the middle of the liquid channel, and a region facing the filter in the filter chamber A flow path member formed of an elastic member,
Choke means for opening and closing the liquid flow path upstream of the filter chamber;
Pressing means for pressing the elastic member toward the filter,
The filter chamber has a dome shape protruding to the opposite side of the filter,
After the choke means closes the liquid flow path, the pressing means presses the elastic member, and when the liquid flow path is blocked by the choke means, the pressing means releases the pressure on the elastic member. And
The liquid ejecting head , wherein the pressing means and the choke means are interlocked .   The pressing means includes a pressing cam that is an eccentric cam,
  The choke means includes a choke cam that is an eccentric cam,
  The liquid ejecting head according to claim 1, wherein the interlocking between the pressing unit and the choke unit is an interlocking between the rotation of the pressing cam and the rotation of the choke cam.   A liquid ejecting apparatus comprising the liquid ejecting head according to claim 1.   The liquid ejecting apparatus according to claim 3, further comprising a suction unit configured to suck liquid from the nozzle opening of the liquid ejecting head. A head body for ejecting liquid from the nozzle opening and a liquid channel for supplying liquid to the head body, and a filter chamber having a filter disposed therein is provided in the middle of the liquid channel; A liquid ejecting head including a flow path member in which an area facing the filter in the filter chamber is formed of an elastic member;
Choke means for opening and closing the liquid channel upstream of the filter chamber or a channel for supplying liquid to the liquid channel;
Pressing means for pressing the elastic member toward the filter,
The filter chamber has a dome shape protruding to the opposite side of the filter,
After the choke means closes the liquid flow path, the pressing means presses the elastic member, and when the liquid flow path is blocked by the choke means, the pressing means releases the pressure on the elastic member. And
The liquid ejecting apparatus , wherein the pressing means and the choke means are interlocked .

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