JP2017007268A - Liquid container and printing apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a printer capable of preventing or suppressing scattering of liquid when a liquid storage container is removed.SOLUTION: Each of ink cartridges (liquid storage containers) 7 comprises an ink supply port 8 into which an ink introduction needle 31 is inserted. Each ink supply port 8 is regulated by an inner peripheral surface 71 of a seal member 67. Each inner peripheral surface 71 comprises a first taper surface portion 71b inclining to an outer peripheral side toward an opening end side of the ink supply port 8. The first taper surface portion 71b is a water-repellent surface 100. When each ink introduction needle 31 is removed from the ink supply port 8 at the time of replacement of the ink cartridge 7, holding of ink by the seal member 67 is suppressed by the water-repellent surface 100. Thus, extension of the ink in a stringy manner between the ink introduction needle 31 and the ink supply port 8 can be suppressed. Accordingly, scattering of liquid caused by the thread-like liquid being torn off can be prevented or suppressed.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a liquid storage container that stores a liquid such as ink, and a printing apparatus on which the liquid storage container is detachably mounted.

  The ink jet printer includes a cartridge mounting portion on which an ink cartridge that stores ink is detachably mounted. The ink cartridge has an ink supply port on the front surface in the mounting direction to the cartridge mounting portion, and the cartridge mounting portion has an ink introduction needle inserted into the ink supply port when the ink cartridge is mounted in the cartridge mounting portion. Have. The ink introduction needle communicates with the print head via the ink supply path.

  In the ink jet printer described in Patent Document 1, the ink supply port is defined by the inner peripheral surface of a cylindrical packing made of an elastic member such as an elastomer. A valve mechanism that opens and closes the ink supply port is provided inside the cylindrical packing in the ink cartridge (in front of the direction in which the ink introduction needle is inserted). The valve mechanism includes a valve body that moves between a closed position that contacts the cylindrical packing from the inside to seal the ink supply port, and an open position that is positioned inside the ink cartridge from the closed position, and closes the valve body. A biasing member that biases the position is provided. When the ink cartridge is mounted in the cartridge mounting portion, the ink introduction needle inserted into the ink supply port moves the valve body from the closed position to the open position. Thereby, the ink introduction needle and the ink cartridge communicate with each other, and ink can be supplied from the ink cartridge to the print head.

JP 2007-30519 A

  When removing the ink cartridge from the cartridge mounting portion, the ink cartridge is moved in the direction opposite to the mounting direction, and the ink introduction needle is pulled out from the ink supply port.

  Here, when the liquid introduction needle (ink introduction needle) is pulled out from the liquid supply port (ink supply port), the liquid (ink) scatters and forms on the front surface of the liquid container (ink cartridge) or the inner wall of the cartridge mounting portion. May adhere.

  In view of these points, an object of the present invention is to provide a liquid container that can prevent or suppress the scattering of a liquid such as ink when the liquid container is removed. Another object of the present invention is to provide a printing apparatus equipped with such a liquid container.

  When the present inventors observed using the high-speed camera that the liquid introduction needle is pulled out from the liquid supply port, the liquid introduction needle and the liquid supply port are separated between the liquid introduction needle and the liquid supply port. It was confirmed that the (ink) extended so as to pull the thread, and the liquid was scattered when the thread-like liquid was broken. Such a phenomenon was also observed when the viscosity of the liquid (ink) was relatively low. The present invention is based on such new findings of the inventors.

  In order to solve the above problems, the present invention has a liquid supply port into which the liquid introduction needle is inserted in a liquid storage container that is detachably mounted on a liquid storage container mounting portion including a liquid introduction needle, The liquid supply port is provided with a water repellent surface.

  According to the present invention, the liquid supply port is provided with a water repellent surface. Here, since the water repellent surface has low wettability and the contact angle of the liquid adhering to the water repellent surface is large, the liquid may be held on the ink supply port side when the liquid introduction needle is pulled out from the liquid supply port. It is suppressed. Thereby, it can suppress that a liquid is hold | maintained in the state of both-end support between the liquid introduction needle | hook and the liquid supply port, and the liquid extends so that a thread | yarn may be pulled. Therefore, it is possible to prevent or suppress the thread-like liquid from being broken and scattered.

  In the present invention, the inner peripheral surface of the liquid supply port includes a sliding contact surface portion that is in sliding contact with the outer periphery of the liquid introduction needle, and an opening of the liquid supply port from an end portion of the sliding contact surface portion on the liquid supply port side. And a tapered surface portion inclined toward the outer periphery toward the end side, and the tapered surface portion preferably includes the water repellent surface. In this way, when the liquid introduction needle is pulled out from the liquid supply port, the liquid is prevented from being in a state of being supported between the tip side portion of the liquid introduction needle and the tapered surface portion of the liquid supply port, or Can be suppressed. In addition, when a water repellent surface is provided on the sliding surface portion, the water repellent surface may be worn by sliding contact with the liquid introduction needle. However, if a water repellent surface is provided on the tapered surface portion, the wear is prevented or Can be suppressed.

  In the present invention, it is preferable that the liquid supply port has an annular elastic member that defines the liquid supply port, and an inner peripheral surface of the liquid supply port is an inner peripheral surface of the elastic member. In this way, a liquid-tight seal can be formed between the liquid introduction needle inserted into the liquid supply port and the inner peripheral surface of the liquid supply port.

  In the present invention, the water repellent surface is a surface on which a water repellent film is formed, and the water repellent surface is provided on the tapered surface portion and the sliding contact surface portion, and the water repellent surface provided on the sliding contact surface portion. It is desirable that the film is thicker than the water repellent film provided on the tapered surface portion. In this way, it is possible to further suppress the liquid from being held on the liquid supply port side. Further, the water repellent surface provided on the sliding contact surface portion can be maintained for a long period.

  In the present invention, the water repellent surface is provided by forming a water repellent film on the sliding surface portion and the tapered surface portion, and the hardness of the water repellent film provided on the sliding surface portion is It is desirable that the hardness of the water repellent film provided on the tapered surface portion is higher. In this way, it is possible to further suppress the liquid from being held on the liquid supply port side. Further, the water repellent surface provided on the sliding contact surface portion can be maintained for a long period.

  Next, the printing apparatus of the present invention includes the above-described liquid storage container and the liquid introduction needle, and the liquid storage container is detachably mounted in a state where the liquid introduction needle is inserted into the liquid supply port. A liquid storage container mounting portion; a print head; and a liquid flow path communicating the print head and the liquid introduction needle. The ink stored in the liquid storage container via the liquid flow path is It is characterized by being supplied to the print head.

  ADVANTAGE OF THE INVENTION According to this invention, when removing the liquid storage container which stores ink from a liquid storage container mounting part, it can prevent or suppress that ink scatters and adheres to the inner wall of a liquid storage container or a liquid storage container mounting part. .

It is the external appearance perspective view and sectional drawing of the inkjet printer to which this invention is applied. It is explanatory drawing of the ink supply system of the inkjet printer of FIG. FIG. 6 is a perspective view of the ink cartridge with a lid removed. It is explanatory drawing of the ink supply port structural member of an ink cartridge. FIG. 6 is a longitudinal sectional view of an ink cartridge mounting unit. It is a perspective view of an ink introduction needle. FIG. 10 is an explanatory diagram of an ink cartridge attaching / detaching operation. FIG. 6 is an explanatory diagram of a state where ink extends between an ink cartridge and an ink introduction needle.

  Hereinafter, a printing apparatus including a liquid container mounting portion to which the present invention is applied will be described with reference to the drawings.

(Printer)
FIG. 1A is an external perspective view of an ink jet printer, and FIG. 1B is a cross-sectional view showing an internal structure thereof. FIG. 2 is an explanatory diagram of an ink supply system of the ink jet printer 1 of FIG. As shown in FIG. 1A, the ink jet printer 1 includes a printer housing 2 having a rectangular parallelepiped shape that is long in the front-rear direction as a whole. In the upper part of the front surface 2a of the printer housing 2, an operation panel 3 is provided on one side in the width direction, and a paper discharge port 4 is formed on the other side. An opening / closing lid 5 is provided below the operation panel 3. The opening / closing lid 5 opens and closes an ink cartridge mounting portion (liquid container mounting portion) 6 provided in the printer housing 2.

  As shown in FIG. 2, a rectangular parallelepiped ink cartridge 7 is detachably mounted on the ink cartridge mounting portion 6. The ink cartridge 7 includes an ink supply port (liquid supply port) 8 for supplying ink to the inkjet printer 1. Hereinafter, the inkjet printer 1 will be described with the three directions orthogonal to each other as the width direction X, the front-rear direction Y, and the up-down direction Z. Further, the side where the paper discharge port 4 is provided will be described as the front (front side) + Y in the front-rear direction Y, and the opposite side will be described as the rear (rear side) -Y.

  As shown in FIG. 1B, a roll paper storage unit 11 for loading roll paper is formed in the lower part of the rear-Y inside the printer housing 2. In addition, a paper transport path 13 is formed in the printer casing 2 from the roll paper storage unit 11 to the paper discharge port 4 via the print position P by the print head 12. The paper transport path 13 extends obliquely upward from the roll paper storage unit 11 toward the rear -Y, then curves forward + Y, and extends forward + Y to reach the paper discharge port 4.

  The print head 12 is disposed in the upper part on the front end side of the printer housing 2. The print head 12 is an inkjet head, and is mounted on the carriage 15 with its ink nozzle surface 12a facing downward.

  A platen unit 16 is disposed below the print head 12 with a predetermined gap from the ink nozzle surface 12a. The printing position P is defined by the platen unit 16. The platen unit 16 is equipped with a transport mechanism 17 for transporting a long recording paper fed out from the roll paper. The transport mechanism 17 includes a transport motor 18 as a drive source. A pair of carriage guide shafts 21 extending in the width direction X are arranged in parallel on both sides of the carriage 15 in the front-rear direction Y. The carriage 15 is supported by the pair of carriage guide shafts 21 so as to be movable in the width direction X.

  As the carriage 15 moves in the width direction X, the print head 12 moves between the printing position P and the maintenance position M that is outside the paper conveyance path 13 in the width direction X (see FIG. 1A). ). A head maintenance unit 25 is arranged at the maintenance position M. As shown in FIG. 2, the head maintenance unit 25 includes a head cap 26 facing the ink nozzle surface 12a of the print head 12 disposed at the maintenance position M, a capping position covering the ink nozzle surface 12a, and the ink nozzle surface 12a. And a cap moving mechanism 27 that moves the head cap 26 up and down between the head opening positions separated from the head. The cap moving mechanism 27 includes a lift motor 28 as a drive source. The head maintenance unit 25 includes a suction pump 29 that sucks ink and the like from the print head 12 via the head cap 26.

(Ink supply system)
As shown in FIG. 2, the ink supply system includes an ink introduction needle 31 provided in the ink cartridge mounting portion 6, and an ink flow path (liquid flow path) 35 that communicates between the ink introduction needle 31 and the print head 12. . The ink introduction needle 31 is inserted into the ink supply port 8 of the ink cartridge 7 mounted on the ink cartridge mounting portion 6. The ink flow path 35 is a flat flow path 37, a first flexible flow path 38, a diaphragm pump 39, a second possible flow path from the upstream side to the downstream side in the ink supply direction from the ink introduction needle 31 toward the print head 12. A flexible flow path 40 and a sub tank 41 are provided. The diaphragm pump 39 sucks ink from the ink cartridge 7 through the ink introduction needle 31 and supplies it to the sub tank 41. The sub tank 41 is provided with a pressure adjusting mechanism (not shown), and supplies ink in a predetermined pressure state to the print head 12.

  In this example, four ink cartridges 7 for supplying black ink, cyan ink, magenta ink, and yellow ink are mounted on the ink cartridge mounting portion 6. Therefore, four ink introduction needles 31 that supply black ink, cyan ink, magenta ink, and yellow ink to the print head 12 and four ink flow paths 35 are provided.

(ink cartridge)
FIG. 3 is a perspective view of the ink cartridge 7 with the lid removed. FIG. 4 is an explanatory diagram of the ink supply port constituting member. 4A is a cross-sectional view of the ink cartridge 7 cut along a surface passing through the ink supply port constituting member, and FIG. 4B is a perspective view of the ink supply opening constituting member. FIG. 4 is a perspective view of a seal member held by an ink supply port constituting member, and FIG. 4D is a perspective view of a valve body supported by the ink supply port constituting member. In the description of the ink cartridge 7, the width direction X, the front-rear direction Y, and the up-down direction Z of the ink cartridge mounting unit 6 as a reference are the width direction X, the front-rear direction Y, and the upper-lower direction of the inkjet printer 1. The direction is the same as the direction Z. With reference to the mounting posture, the front (front side) + Y and the rear (rear side) −Y of the ink cartridge 7 are set in the same direction as the front (front side) + Y and the rear (rear side) −Y of the ink jet printer 1. .

  As shown in FIG. 2, the ink cartridge 7 has a rectangular parallelepiped case 51 that is long in the front-rear direction Y. The case includes a case main body 52 and a lid 53 arranged in the width direction X. The lid 53 is detachably attached to the case main body 52. As shown in FIG. 3, the case main body 52 includes a case opening 55 at the center in the vertical direction Z on the back surface 52 a (the rear side of the ink cartridge 7 -the end surface of Y). Further, the case body 52 has guide holes 56 on both sides of the case opening 55 in the vertical direction Z. An ink pack 58 is stored in the case main body 52. The ink pack 58 includes a flexible ink containing bag 59 and an ink supply port constituting member 60 attached to the rear-Y edge of the ink containing bag 59.

  As shown in FIG. 4A, the ink supply port constituting member 60 includes a cylindrical member 61 whose axis L1 is directed in the front-rear direction Y. As shown in FIG. 4B, the cylindrical member 61 includes a cylindrical portion 62 having a constant outer diameter dimension at the central portion in the direction of the axis L1. The cylindrical portion 62 has an annular flange 63 that protrudes radially outward at an intermediate position in the direction of the axis L1. The tubular member 61 includes a large-diameter tubular portion 64 having a larger outer diameter than the tubular portion 62 on the rear side -Y of the tubular portion 62, and a welded portion 65 on the front + Y of the tubular portion 62. The welded portion 65 has a flat shape in which the vertical direction Z is long and the width direction X is short. The ink supply port constituting member 60 is fixed to the ink containing bag 59 by the welding portion 65 being thermally welded to the rear-Y edge of the ink containing bag 59.

  The large diameter cylindrical portion 64 holds an annular seal member 67 coaxially on the inner peripheral side. An inner peripheral side of the cylindrical portion 62 is a valve chamber 68. A valve body 69 is arranged in the valve chamber 68 so as to be movable in the front-rear direction Y. The valve chamber 68 is provided with a coil spring 70 that urges the valve body 69 against the seal member 67.

  Here, the ink pack 58 is accommodated in the case main body 52 in a state where the flange 63 of the ink supply port constituting member 60 is held by the holding portion 52 b provided in the case main body 52. When the ink pack 58 is stored in the case 51, the case opening 55 and the ink supply port constituting member 60 overlap when viewed from the front-rear direction Y, and the case opening 55 and the seal member 67 are positioned coaxially. The inner peripheral surface 71 of the seal member 67 defines the ink supply port 8 of the ink cartridge 7.

  The seal member 67 is made of an elastic member such as rubber or elastomer. In this example, the seal member 67 is made of an elastomer. The inner peripheral surface 71 of the seal member 67 is inclined to the inner peripheral side from the front end of the annular surface portion 71a toward the front + Y from an annular surface portion 71a extending from the rear end of the seal member 67 toward the front + Y with a constant inner diameter. The first tapered surface portion 71b, the slidable contact surface portion 71c extending forward + Y from the front end of the first tapered surface portion 71b, and the slidable contact (inclined toward the outer peripheral side toward the opening end side of the ink supply port 8) A second tapered surface portion 71d that inclines from the front end of the surface portion 71c toward the front side + Y toward the outer peripheral side is provided.

  The valve body 69 includes a cup-shaped valve body main body 73 whose opening is directed to the rear side -Y, and a plurality of ribs 74 protruding from the outer peripheral surface of the valve body main body 73 to the outer peripheral side and forward + Y. The valve body 69 includes a closed position 69A where the rear end edge portion of the valve body main body 73 abuts against the second taper surface portion 71d of the seal member 67, and an open position 69B separated from the closed position 69A forward + Y (FIG. 7C ))).

  Here, the first tapered surface portion 71 b of the seal member 67 is a water repellent surface 100. The water repellent surface 100 is formed by providing a water repellent film coated with Teflon (registered trademark) on the first tapered surface portion 71b.

(Ink cartridge mounting part)
FIG. 5 is a longitudinal sectional view of the ink cartridge mounting portion 6. The ink cartridge mounting unit 6 includes a mounting chamber 75 in which the ink cartridge 7 can be stored. The ink introduction needle 31 is fixed to the rear-Y side wall 76 in the mounting chamber 75. The ink introduction needle 31 includes a needle portion 31 a that protrudes forward + Y from the wall surface of the side wall 76. In addition, two guide pins 77 protrude forward + Y from the side wall 76. The two guide pins 77 are provided on both sides of the ink introduction needle 31 in the vertical direction Z. The leading end of each guide pin 77 is positioned in front + Y from the leading end of the ink introduction needle 31. A guide rail 79 extending in the front-rear direction Y is laid on the bottom wall 78 of the mounting chamber 75.

  A slider 80 is disposed at a position near the side wall 76 in the mounting chamber 75. The slider 80 moves along the guide rail 79 between a contact position 80A that contacts the side wall 76 and a separation position 80B that is separated from the side wall 76 by a predetermined distance forward + Y. The slider 80 is supported at the separation position 80 </ b> B by a coil spring 81 disposed coaxially on the outer peripheral side of each guide pin 77.

  The slider 80 includes an opening 82 at a position overlapping the ink introduction needle 31 when viewed from the front-rear direction Y. The ink introduction needle 31 penetrates the opening 82 when the slider 80 is disposed at the contact position 80 </ b> A, and the tip side portion of the needle portion 31 a is exposed forward + Y from the slider 80. Further, the slider 80 includes a through hole 83 at a position overlapping with each guide pin 77 when viewed from the front-rear direction Y. Each guide pin 77 passes through each through hole 83.

(Ink introduction needle)
FIG. 6 is a perspective view of the ink introduction needle 31. As shown in FIG. 6, the ink introduction needle 31 includes a needle portion 31 a and a fixing portion 85 that is fixed to the side wall 76. The needle portion 31a includes a first taper portion 86 that inclines inward toward the front + Y from the fixed portion 85, and a sliding contact portion 87 that extends from the front end edge of the first taper portion 86 to the front + Y with a constant outer diameter. With. Further, the needle portion 31a is inclined inward + Y of the sliding contact portion 87, a small diameter portion 88 having a smaller outer diameter than the sliding contact portion 87, and an inner peripheral side from the front end edge of the small diameter portion 88 toward the front + Y. A second tapered portion 89 and a circular plate portion 90 in which the front end edge of the second tapered portion 89 is continuous are provided. A step portion 91 is formed between the sliding contact portion 87 and the small diameter portion 88. The step portion 91 has a forward-facing annular end surface.

  As shown in FIG. 5, a circular recess 92 extending along the axis L <b> 2 of the ink introduction needle 31 toward the front + Y is provided on the rear end surface 85 a (the rear end surface of the ink introduction needle 31) of the fixing portion 85. . The circular concave portion 92 reaches the tip portion of the sliding contact portion 87. In addition, an ink introduction hole 93 that extends radially inward from the outer peripheral surface of the sliding contact portion 87 and communicates with the circular recess 92 is provided at the front end portion of the sliding contact portion 87. The ink introduction hole 93 communicates with the ink flow path 35 via the circular recess 92.

(Removal of ink cartridge)
FIG. 7 is an explanatory diagram of the attaching / detaching operation of the ink cartridge 7. FIG. 7 shows the positional relationship between the ink introduction needle 31 and the ink cartridge 7. As shown in FIG. 7A, when the ink cartridge 7 is mounted on the ink cartridge 7, the ink cartridge 7 is inserted into the ink cartridge mounting portion 6 from the front + Y. At this time, the ink cartridge 7 is placed on the guide rail 79 and guided along the guide rail 79. Thereafter, the ink cartridge 7 further moves backward -Y (front in the mounting direction) while pushing the slider 80 backward -Y against the urging force of the coil spring 70.

  When the ink cartridge 7 moves the slider 80, each guide pin 77 of the ink cartridge mounting portion 6 is inserted into each guide hole 56 of the ink cartridge 7. Accordingly, the ink cartridge 7 is positioned in the width direction X and the vertical direction Z. Thereafter, when the ink cartridge 7 further moves rearward-Y, the ink introduction needle 31 of the ink cartridge mounting portion 6 is inserted into the ink supply port 8 of the ink cartridge 7.

  When the ink introduction needle 31 is inserted into the ink supply port 8, as shown in FIG. 7B, first, the tip end portion 94 (the second taper portion 89 and the plate portion 90) of the ink introduction needle 31 is sealed. The sliding contact surface portion 71c is inserted into the inner peripheral side. Thereafter, when the ink cartridge 7 moves rearward-Y, the ink introduction needle 31 is further inserted into the ink supply port constituting member 60 while the sliding contact portion 87 is slidably contacted with the sliding contact surface portion 71c. . The ink introduction needle 31 moves the valve element 69 at the closed position 69A to the open position 69B against the urging force of the coil spring 70.

  In the state in which the valve element 69 is moved to the open position 69B, the ink introduction hole 93 of the ink introduction needle 31 exceeds the seal member 67 and has a more ink supply port configuration than the seal member 67, as shown in FIG. Located inside the member 60. Therefore, the ink stored in the ink pack 58 can be supplied to the print head 12 from between the ribs 74 of the valve element 69 via the ink introduction hole 93, the circular recess 92, and the ink flow path 35.

  Here, when the slider 80 moves to the contact position 80A, the ink cartridge 7 is locked to the ink cartridge mounting portion 6 by a locking mechanism (not shown). As a result, the ink cartridge 7 is mounted on the ink cartridge mounting portion 6 in a state in which it cannot move in the front-rear direction Y.

  Next, when the ink cartridge 7 is replaced, the locking of the ink cartridge 7 by the locking mechanism is released. Accordingly, the slider 80 moves from the contact position 80A to the separation position 80B by the biasing force of the coil spring 70. Accordingly, the ink cartridge 7 is pushed forward + Y by the slider 80 and moves. When the ink cartridge 7 moves forward + Y, the ink introduction needle 31 moves relative to the ink cartridge 7 while sliding the sliding contact portion 87 on the sliding contact surface portion 71c of the seal member 67, and the ink supply port Pulled out from 8.

  When the ink introduction needle 31 is pulled out from the ink supply port 8, the tip end portion 94 (second taper portion 89 and plate portion 90) of the ink introduction needle 31 is attached to the seal member 67 as shown in FIG. The ink introduction needle 31 and the seal member 67 are separated from each other through the state located inside the sliding contact surface portion 71c.

  Here, when the ink supply port 8 is not provided with the water-repellent surface 100, as shown in FIG. 8, when the ink introduction needle 31 is pulled out from the ink supply port 8, the ink I is absorbed by the ink introduction needle 31. Both end portions 94 and the seal member 67 that defines the ink supply port 8 are likely to be both-end supported. As a result, when the ink introduction needle 31 and the ink supply port 8 are separated from each other, the ink (ink) extends between the ink introduction needle 31 and the ink supply port 8 so as to pull a thread, and the thread-like ink is cut off. Ink may be scattered.

  On the other hand, in this example, the first taper surface portion 71 b of the seal member 67 that defines the ink supply port 8 is the water repellent surface 100. The water repellent surface 100 has low wettability, and the contact angle of the ink attached thereto is large. Therefore, when the ink introduction needle 31 is pulled out from the ink supply port 8, the ink is suppressed from being held on the ink supply port 8 side. Therefore, it is possible to prevent the ink from being held between the ink introduction needle 31 and the ink supply port 8 in a state where both the inks are held and extending so as to pull the thread. Accordingly, it is possible to prevent or suppress the thread-like ink from being broken and scattered.

  Further, in this example, the water repellent surface 100 is provided on the first tapered surface portion 71 b having a larger inner diameter than the sliding contact surface portion 71 c in sliding contact with the ink introduction needle 31 on the inner peripheral surface 71 of the seal member 67. . Therefore, it is possible to prevent the water repellent surface 100 from being worn by sliding contact with the ink introduction needle 31. Therefore, the water repellent surface 100 provided on the seal member 67 can be maintained over a long period.

(Modification)
The water repellent surface 100 can also be provided on the first tapered surface portion 71 b and the sliding contact surface portion 71 c of the seal member 67. In this case, the water repellent film provided on the sliding contact surface portion 71c to form the water repellent surface 100 can be made thicker than the water repellent film provided on the first tapered surface portion 71b. In this way, the water repellent surface 100 provided on the slidable contact surface portion 71c can be maintained for a long period.

  Further, when the water repellent surface 100 is provided on the first tapered surface portion 71b and the sliding contact surface portion 71c of the seal member 67, the hardness of the water repellent film provided on the sliding contact surface portion 71c to form the water repellent surface 100 is The hardness of the water repellent film provided on the first tapered surface portion 71b can be higher. In this way, since the wear resistance of the water repellent surface 100 can be improved, the water repellent surface 100 provided on the sliding contact portion 87 can be maintained for a long period of time.

  The water repellent surface 100 can also be provided by forming fine irregularities on the first tapered surface portion 71b.

  Further, not only the seal member 67 but also a water repellent surface may be provided on the ink introduction needle 31 side. In this case, for example, it is desirable to provide a water repellent surface on the outer peripheral surface of the tip portion 94 (the second taper portion 89 and the plate portion) on the front side of the small diameter portion 88 in the ink introduction needle 31.

1 .. Inkjet printer, 2 .. Printer housing, 2a .. Front, 3 .. Operation panel, 4 .. Outlet, 5 .. Opening / closing lid, 6 .. Ink cartridge mounting part, 7. (Liquid container), 7a ... Back of ink cartridge, 8 ... Ink supply port (liquid supply port), 11 ... Roll paper storage unit, 12 ... Print head, 12a ... Ink nozzle surface, 13 ... Paper transport path, 15 ... Carriage, 16 ... Platen unit, 17 ... Transport mechanism, 18 ... Transport motor, 21 ... Carriage guide shaft, 25 ... Head maintenance unit, 26 ... Head cap, 27 ... Cap moving mechanism, 28 ... Lifting motor, 29 ... Suction pump, 31 ... Ink introduction needle (liquid introduction needle), 31a ... Needle part, 35 ... Ink channel (liquid channel) 37 .. Planar flow path, 38 .. Flexible flow path, 39.. Diaphragm pump, 40 .. Flexible flow path, 41 .. Sub tank, 51 .. Case, 52 .. Case body, 52 a. .. back, 52b .. holding part, 53 .. lid, 55 .. case opening, 56 .. guide hole, 58 .. ink pack, 59 .. ink containing bag, 60 .. ink supply port constituting member, 61 ..Cylindrical member, 62 ..Cylinder part, 63 ..Flange, 64 ..Large diameter cylindrical part, 65 ..Welding part, 67 ..Seal member (elastic member), 68. Valve body, 69A..Closed position, 69B..Open position, 70..Coil spring, 71..Inner peripheral surface of seal member, 71a..annular surface portion, 71b..first taper surface portion, 71c..slider Contact surface part, 71d ··· Second taper surface part, 73 ··· Valve body, 74 ··· 75 ··· Mounting chamber, 76 ·· Side wall, 77 ··· Guide pin, 78 ·· Bottom wall, 79 · · Guide rail, 80 · · Slider, 80A · · Contact position, 80B · · Separation position, 81 · · .. coil spring, 82 .. opening, 83 .. through hole, 85 .. fixing portion of ink introduction needle, 85 a .. rear end surface of fixing portion, 86 .. first taper portion, 87. ..Small diameter portion, 89 ..Second taper portion, 90 ..Plate portion, 91 ..Step portion, 92 ..Circular concave portion, 93 ..Ink introduction hole, 94 ..Tip portion of ink introduction needle, 100. · Water repellent surface, L1 · · Axis of ink supply port component, L2 · · Axis of ink introduction needle, M · · Maintenance position, P · · Print position, X · · Width direction, Y · · Front and back direction, + Y ·・ Front, -Y ・ ・ Back, Z ・ ・ Vertical direction

Claims (6)

In a liquid storage container that is detachably mounted on a liquid storage container mounting portion that includes a liquid introduction needle,
A liquid supply port into which the liquid introduction needle is inserted;
A liquid container having a water repellent surface at the liquid supply port. In claim 1,
The inner peripheral surface of the liquid supply port includes a sliding contact surface portion that is in sliding contact with the outer periphery of the liquid introduction needle, and an end portion on the liquid supply port side of the sliding contact surface portion from an opening end side of the liquid supply port. A tapered surface portion inclined toward the outer peripheral side,
The tapered container includes the water repellent surface. In claim 2,
An annular elastic member defining the liquid supply port;
An inner peripheral surface of the liquid supply port is an inner peripheral surface of the elastic member. In claim 2 or 3,
The water repellent surface is a surface on which a water repellent film is formed,
The water repellent surface is provided on the tapered surface portion and the sliding surface portion,
The liquid container according to claim 1, wherein the water repellent film provided on the sliding surface portion is thicker than the water repellent film provided on the tapered surface portion. In claim 2 or 3,
The water repellent surface is a surface on which a water repellent film is formed,
The water repellent surface is provided on the tapered surface portion and the sliding surface portion,
The liquid container according to claim 1, wherein a hardness of the water repellent film provided on the sliding surface portion is higher than a hardness of the water repellent film provided on the tapered surface portion. A liquid container according to any one of claims 1 to 5,
A liquid storage container mounting portion that includes the liquid introduction needle, and in which the liquid storage container is detachably mounted in a state where the liquid introduction needle is inserted into the liquid supply port;
A print head;
A liquid flow path communicating the print head and the liquid introduction needle,
A printing apparatus, wherein ink stored in the liquid container is supplied to the print head through the liquid channel.