Patent Application
20190366723
The present application is based on, and claims priority from JP Application Serial Number 2018-105797, filed Jun. 1, 2018, the disclosure of which is hereby incorporated by reference herein in its entirety.
The present disclosure relates to a liquid container and a liquid ejection device.
A liquid container including an ink pack and a connection member for connecting the ink pack to a liquid ejection device is disclosed in JP-A-2018-65374, as a liquid container for supplying liquid to the liquid ejection device, for example. A user places the liquid container in a case whose upper face is open by operating a handle provided in the connection member, and inserts the case to the liquid ejection device, and as a result, the liquid container is attached to the liquid ejection device.
If a portion in which ink of an ink pack is contained is present in the vicinity of a connection member, in such a liquid container, the connection member is likely to be affected by surface waviness and ripples of the ink inside the ink pack. When surface waviness and ripples occur in ink, the position of the connection member relative to the liquid ejection device is likely to be shifted, and it is possible that it becomes difficult to supply ink stably to the liquid ejection device. This problem occurs, not only in the ink pack in which ink is contained, but also in a liquid container in which liquid is contained in a flexible bag and in a liquid ejection device to which the liquid container is attached.
According to one aspect of the present disclosure, a liquid container for supplying liquid to a liquid ejection device is provided. The liquid container includes: when three directions that orthogonally intersect each other are denoted as a D direction, a T direction, and a W direction, a positive direction of the D direction is denoted as a +D direction, and the direction opposite to the +D direction is denoted as a −D direction, a direction in which the size of an external shape of the liquid container is smallest is the T direction, and a direction orthogonal to the D direction and the T direction is the W direction, the D direction and the W direction extending in a horizontal direction in a state in which the liquid container is attached to the liquid ejection device, a flexible bag provided with a liquid container that internally contains the liquid; a liquid outlet member attached to a one end portion of the bag on the −D direction side; and a connection member that is attached to the one end portion so as to cover the liquid outlet member and a portion of the one end portion from the outside. The bag includes a sealed portion on an outer periphery side relative to the liquid container, the sealed portion includes a one end portion- side sealed portion that is formed along the W direction at an end on the −D direction side, a first width, which is a width of the one end portion-side sealed portion in at least a surrounding region of the connection member, is larger than a second width, which is a width of the sealed portion at other ends of the bag, and an end, on the +D direction side, of a portion, of the one end portion-side sealed portion, having the first width is located on the +D direction side relative to an end of the connection member on the +D direction side.
According to another aspect of the present disclosure, a liquid ejection device is provided to which a liquid container including a liquid outlet member is detachably attached. The liquid ejection device includes a hollow liquid introduction needle to be inserted into the liquid outlet member. A leading end portion of the liquid introduction needle is constituted by a combination of a truncated cone that has a first bottom face and an upper face whose diameter is smaller than that of the first bottom face, and a cone that is provided on the upper face of the truncated cone, and has a second bottom face whose diameter is smaller than that of the upper face of the truncated cone, and the central axis of the cone matches the central axis of the truncated cone.
The disclosure will be described with reference to the accompanying drawings, wherein like numbers reference like elements.
A container 13 whose size is approximately the same as the width of the liquid ejection device 11 can be attached to the attachment portion 14. A liquid container 20 whose size is approximately the same as the width of the container 13 is removably mounted to the container 13. That is, the liquid container 20 is mounted on the container 13 that is detachably attached to the liquid ejection device 11. The container 13 can be detachably attached to the attachment portion 14 even in a state in which the liquid container 20 is not held. When the container 13 is attached to the attachment portion 14, the front cover 15 is opened, the container 13 is inserted into an accommodation space inside the attachment portion 14, and is moved along a movement path that extends in the depth direction. A connection mechanism 29 for coupling the container 13 to the liquid ejection device 11 is provided on a depth side of the accommodation space.
A liquid ejector 21 that ejects liquid from a nozzle and a carriage 22 that moves back and forth along a scanning axis that matches the width direction of the liquid ejection device 11 are provided inside the exterior body 12. The liquid ejector 21 moves along with the carriage 22, and performs printing on a medium by ejecting liquid that is supplied from the liquid container 20 mounted in the container 13 via the connection mechanism 29 to the medium. Note that, in other embodiments, the liquid ejector 21 may be a line head that does not move back and forth and whose position is fixed.
In the present embodiment, a direction that is orthogonal to the movement path when the container 13 is attached to the attachment portion 14 is the width direction, and a direction in which the movement path extends is a depth direction. Also, the width direction and the depth direction substantially extend along a horizontal plane. In the diagram, the gravity direction is indicated by a Z axis assuming that the exterior body 12 is placed on a horizontal plane, and the movement direction when the container 13 is attached to the attachment portion 14 is indicated by a Y axis. The movement direction may also be expressed as an attachment direction or an insertion direction to the attachment portion 14. The direction opposite to the movement direction may also be expressed as a removal direction. Also, the width direction is indicated by an X axis that is orthogonal to the Z axis and Y axis. That is, the width direction, the gravity direction, and the attachment direction orthogonally intersect each other, and are respectively directions when the lengths of width, height, and depth are expressed.
The first connection mechanism 29F includes a terminal unit 40 that is arranged vertically upward of the liquid introduction needle 32, and protrudes in the removal direction. The terminal unit 40 is coupled to a control device 42 via an electric line 41 such as a flat cable. The terminal unit 40 is arranged such that an upper end protrudes in the removal direction relative to a lower end, and is directed obliquely downward. Also, two guide projections 40a that protrude in the width direction and extend along the attachment direction are arranged on respective sides of the terminal unit 40 in the width direction.
The second connection mechanism 29S includes a block 44 for preventing erroneous insertion that is arranged vertically upward of the liquid introduction needle 32, and protrudes in the removal direction. The block 44 has protrusions and recesses that are arranged so as to face downward.
The connection mechanism 29 includes a first positioning protrusion 45, a second positioning protrusion 46, an extrusion mechanism 47 that is arranged so as to surround the liquid introduction needle 32, and a liquid receiver 48 that protrudes in the removal direction below the liquid introduction needle 32. The first positioning protrusion 45 and the second positioning protrusion 46 are respectively included in the first connection mechanism 29F and the second connection mechanism 29S, and are arranged side by side in the width direction so as to sandwich the liquid introduction needle 32. The first positioning protrusion 45 and the second positioning protrusion 46 are a pair of rod-like protrusions that project, in parallel, in the removal direction. The projection lengths of the first positioning protrusion 45 and the second positioning protrusion 46 in the removal direction are larger than the projection length of the liquid introduction needle 32 in the removal direction.
The extrusion mechanism 47 includes a frame member 47a that surrounds a base end portion of the liquid introduction needle 32, a pressing portion 47b that protrudes in the removal direction from the frame member 47a, and a biasing portion 47c that biases the container 13 in the removal direction via the pressing portion 47b. The biasing portion 47c may be a coil spring that is interposed between the frame member 47a and the pressing portion 47b, for example.
The leading end portion 323 of the liquid introduction needle 32 is constituted by a combination of a truncated cone 324 and a cone 325. The truncated cone 324 has a first bottom face 324b and an upper face 324t whose diameter is smaller than that of the first bottom face 324b. The cone 325 is provided on the upper face 324t of the truncated cone 324. The cone 325 has a second bottom face 325b whose diameter is smaller than that of the upper face 324t of the truncated cone 324, and an apex 325t. The central axis AX of the cone 325 matches the central axis AX of the truncated cone 324. In the present embodiment, the truncated cone 324 and the cone 325 are integrally formed in the liquid introduction needle 32. Therefore, the first bottom face 324b and the upper face 324t of the truncated cone 324 and the second bottom face 325b of the cone 325 include virtual faces that are involved in the liquid introduction needle 32, as indicated by broken lines in
A D direction, a T direction, and a W direction that are three directions that orthogonally intersect each other are shown in
The liquid container 20 is for supplying liquid to the liquid ejection device 11. The liquid container 20 includes a bag 60 and a connection member 61. The bag 60 is flexible. The bag 60 may have a pillow-type shape or a gusset-type shape. The bag 60 of the present embodiment is a pillow-type bag that is formed by stacking two rectangular films and joining the peripheral edges of the films to each other. The film that constitutes the bag 60 is made of a material that has flexibility and gas barrier properties. Examples of the material of the films constituting the bag 60 include polyethylene terephthalate (PET), nylon, polyethylene, and the like. Also, the film may be formed using a laminated structure in which a plurality of films made of these materials are laminated. In such a laminated structure, the outer layer may be made of PET or nylon that has excellent impact resistance, and the inner layer may be made of polyethylene that has excellent ink resistance, for example. Furthermore, a film including a layer acquired by vapor depositing aluminum or the like may be one constituent member of the laminated structure.
The bag 60 in the present embodiment, in a state in which liquid is contained, has a substantially rectangular parallelepiped shape. In the present embodiment, the size of the bag 60 along the W direction is larger than the size along the D direction and the size along the T direction. Also, in the present embodiment, the size of the bag 60 along the D direction is larger than the size along the T direction. The bag 60 includes a one end portion 60a and another end portion 60b that opposes the one end portion 60a. The one end portion 60a is located at an end of the bag 60 on the −D direction side, and the other end portion 60b is located at an end of the bag 60 on the +D direction side. The bag 60 includes, inside thereof, a liquid container 60c for containing liquid. In the present embodiment, ink, as the liquid, in which pigment as a sedimentary component is dispersed in a solvent is contained in the liquid container 60c. The bag 60 includes a sealed portion 600 on an outer peripheral side relative to the liquid container 60c. The sealed portion 600 is a portion in which a member constituting the face of the bag 60 on the +T direction side and a member constituting the face on the −T direction side are bonded together on their back face sides. Specifically, the sealed portion 600 is a portion in which a film constituting the face of the bag 60 on the +T direction side and a film constituting the face on the −T direction side are adhered together. The sealed portion 600 has a flat shape. Note that a “flat shape” need only be flat as a whole, and may be partially uneven.
The connection member 61 is attached to the one end portion 60a of the bag 60. In the present embodiment, the connection member 61 has a substantially rectangular parallelepiped shape. In the present embodiment, the size of the connection member 61 in the W direction is larger than the size in the D direction and the size in the T direction. Also, the size of the connection member 61 in the D direction is larger than the size in the T direction. In the present embodiment, the width of the connection member 61 along the W direction is smaller than the width of the bag 60 along the W direction. Therefore, the connection member 61 is attached to the center of the bag 60 in the width direction in the one end portion 60a of the bag 60. The connection member 61 includes a liquid outlet portion 52 for guiding out liquid inside the liquid container 60c to the liquid ejection device 11. The liquid outlet portion 52 can also be referred to as a “supply port”. Also, the connection member 61 can also be referred to as an “adapter”.
When the end of the attachment body 50 that is inserted first when the attachment body 50 is attached to the attachment portion 14 is denoted as a leading end, and the end on the side opposite to the leading end is denoted as a base end, the attachment body 50 includes the connection structure 51 in the leading end portion. The connection structure 51 includes a first connection structure 51F and a second connection structure 51S respectively on both sides of the liquid outlet portion 52 in the width direction.
The first connection structure 51F includes a connection terminal 53 that is arranged vertically upward of the liquid outlet portion 52. The connection terminal 53 is provided on a surface of a circuit board, for example, and the circuit board includes a memory that stores various types of information regarding the liquid container 20 (type of the liquid container 20, contained amount of liquid, and the like, for example).
The connection terminal 53 is arranged so as to face obliquely upward inside a recess 53a that is provided in a mode of being open upward and in the attachment direction. Also, guide recesses 53g that extend in the attachment direction are provided on both sides of the connection terminal 53 in the width direction. The guide projections 40a of the connection mechanism 29 shown in
The second connection structure 51S includes an identification portion 54 for preventing erroneous insertion that is arranged vertically upward of the liquid outlet portion 52. The identification portion 54 includes protrusions and recesses that are shaped so as to fit together with the block 44 of the connection mechanism 29 shown in
The connection structure 51 includes first and second positioning holes 55 and 56, a bias receiver 57 that receives a biasing force of the biasing portion 47c shown in
A handle 62 is attached to the connection member 61. The handle 62 is constituted by a member that is different from the connection member 61, and is movable relative to the connection member 61. Specifically, the handle 62 can move by pivoting about a rotation shaft 63 provided in the connection member 61. In the following description, it is assumed that the handle 62 is not included in the “connection member 61”.
The handle 62 includes a grip 62a that is gripped by a user. The grip 62a is located on the bag 60 side, in the depth direction, that is distant from the connection member 61 relative to the shaft 62b that is shaft-supported by the pivot shaft 63. Also, the handle 62 can pivot between a first orientation in which the grip 62a and the pivot shaft 63 are at the same height or the grip 62a is located below the pivot shaft 63 and a second orientation in which the grip 62a is located higher than the pivot shaft 63.
The container 13 includes, in the leading end portion, an engagement receiver 65 with which the connection member 61 of the liquid container 20 can engage. The connection member 61 includes the connection terminal 53, the recess 53a, the guide recesses 53g, the identification portion 54, and the first and second holes 55b and 56b. The engagement receiver 65 of the container 13 includes the bias receiver 57 and the first and second holes 55a and 56a. The connection member 61 is located at the center of the leading end portion of the container 13 when engaged with the engagement receiver 65.
The container 13 includes a bottom plate 67 that constitutes a bottom face, side plates 68 that extend vertically upward from both ends of the bottom plate 67 in the width direction, a front plate 69 that extends vertically upward from a base end of the bottom plate 67, and a leading plate 70 that extends vertically upward from a leading end of the bottom plate 67. The leading plate 70 is formed to be thicker than the front plate 69 and the side plates 68, and has a recess at a central portion that corresponds to the engagement receiver 65.
In the container 13, the bottom plate 67, the side plates 68, the front plate 69, and the leading plate 70 constitute a main body that includes an accommodation space for accommodating the liquid container 20. The container 13 includes an opening 13a through which the liquid container 20 is inserted and removed to and from the accommodation space. In the present embodiment, the opening 13a of the container 13 is open vertically upward, which is a direction different from the attachment direction in which the container 13 advances when being attached to the attachment portion 14.
The connection member 61 of the liquid container 20 is provided with a plurality of guided portions 72 having a substantially round-hole shape that are formed so as to pass through the connection member 61 in a guiding direction. In the present embodiment, two guided portions 72 are formed to be aligned in the width direction. Also, the engagement receiver 65 of the container 13 is provided with a plurality of guiding portions 73 having a substantially columnar shape that protrude in the guiding direction from the bottom plate 67. In the present embodiment, two guiding portions 73 are formed so as to be aligned in the width direction. Note that the guiding direction is a direction orthogonal to the bottom plate 67.
The guiding portions 73 provided in the container 13 guide the guided portions 72 provided in the connection member 61 in the guiding direction. On the other hand, the guided portions 72 provided in the connection member 61 are guided by the guiding portions 73 provided in the container 13 in the guiding direction.
In the present embodiment, each guiding portion 73 has an approximately semi-cylindrically protruded shape, and the side face, extending along the guiding direction, of the guiding portion 73 includes a planar first restriction portion 73a located on the leading end side, and a first curved face portion 73b on the base end side relative to the restriction portion 73a.
Also, each guided portion 72 is formed to have a shape that includes a second restriction portion 72a and a second curved face portion 72b so as to match the shape of the guiding portion 73. The planar restriction portions 72a and 73a restrict escape and rotation of the liquid container 20 when mounted in the container 13.
Coupling of the connection structure 51 included in the attachment body 50 to the connection mechanism 29 will be described with reference to
When the attachment body 50 advances in the depth direction after the first and second positioning protrusions 45 and 46 respectively have engaged with the first and second positioning holes 55 and 56, the bias receiver 57 comes into contact with the pressing portion 47b and receives a biasing force of the biasing portion 47c, and the liquid outlet portion 52 of the liquid container 20 is coupled to the liquid introduction needle 32. In this way, in the present embodiment, the positioning of the attachment body 50 in the width direction is performed using the first and second positioning protrusions 45 and 46 before the liquid introduction needle 32 is coupled to the liquid outlet portion 52.
When the attachment body 50 is inserted to a correct position, the identification portion 54 is properly fits with the block 44 of the connection mechanism 29. In contrast, when a different attachment body 50 is attempted to be attached, because the identification portion 54 does not fit with the block 44, the attachment body 50 cannot move further in the depth direction, and therefore, erroneous attachment can be prevented.
Also, when the attachment body 50 advances in the attachment direction, the terminal unit 40 enters the inside of the recess 53a of the attachment body 50, the position of the terminal unit 40 is adjusted by the guide recesses 53g respectively guided to the guide projections 40a, and the terminal unit 40 comes into contact with the connection terminal 53. With this, the connection terminal 53 is electrically coupled to the terminal unit 40, and information is transmitted and received between the circuit board and the control device 42. As a result of arranging the first positioning hole 55, which serves as a reference for positioning, in the first connection structure 51F, of the first connection structure 51F and the second connection structure 51S, that includes the connection terminal 53, the connection terminal 53 and the terminal unit 40 can be properly coupled.
When the liquid outlet portion 52 of the liquid container 20 is coupled to the liquid introduction needle 32 to achieve a state in which liquid can be supplied, and the connection terminal 53 comes into contact with and electrically coupled to the terminal unit 40, the coupling of the connection structure 51 to the connection mechanism 29 is complete.
The spacer member 90 is a structure for defining a region having a certain volume in the bag 60. The spacer member 90 is made of a synthetic resin such as polyethylene or polypropylene. The spacer member 90 has a portion positioned on the +D direction side relative to the liquid outlet tubes 80. Also, the spacer member 90 is provided at a position intersecting a TD plane that passes through the central axis CX of the liquid outlet portion 52. The TD plane refers to a plane extending in the T direction and the D direction. The spacer member 90 has, on the +D direction side, inclined faces 91 inclined such that the dimension in the T direction of the spacer member 90 increases from the +D direction side toward the −D direction side. In the present embodiment, the spacer member 90 has inclined faces 91 respectively on the +T direction side and the −T direction side relative to the central axis CX. Therefore, the spacer member 90 has a pointed shape toward the +D direction side, when viewed from the W direction. Note that in the present embodiment, a “face” includes not only a face constituted only by a flat face, but also a face on which a groove, a recessed portion or the like is formed, a face on which a protrusion or a projection is formed, and a virtual face surrounded by a frame. In other words, as long as the face can be grasped as being a “face” overall, a certain region occupied by the face may include a recession, a projection, and a through hole.
In an orientation in which the liquid container 20 is attached to the liquid ejection device 11, at least one of the lowermost portion and the uppermost portion of the spacer member 90 comes into contact with the internal face of the bag 60. In the present embodiment, as shown in
In the present embodiment, the liquid container 20 has a first channel portion 81 and a second channel portion 82 as the liquid outlet tubes 80. That is, the liquid container 20 includes two liquid outlet tubes 80. In the present embodiment, the first channel portion 81 and the second channel portion 82 have the same length. The first channel portion 81 has a first base end 81a that is coupled to the liquid outlet member 66 and a first leading end 81b for introducing liquid in the liquid container 60c into the first channel portion 81. The second channel portion 82 has a second base end 82a that is coupled to the liquid outlet member 66 and a second leading end 82b for introducing liquid in the liquid container 60c into the second channel portion 82. Moreover, as shown in
As shown in
The first introduction port 92 and the second introduction port 93 faces in the +D direction. Also, the first introduction port 92 and the second introduction port 93 are provided at positions that are symmetrical in the T direction relative to the central axis CX of the liquid outlet portion 52 shown in
As shown in
As shown in
In the present embodiment, the spacer member 90 is provided with a plate-like partition 97 that extends along the horizontal plane. The partition 97 is provided at a position between the first leading end 81b and the second leading end 82b, namely, a position between the first introduction port 92 and the second introduction port 93 in the T direction. In the present embodiment, the central axis CX of the liquid outlet portion 52 passes through the partition 97. In other words, in the present embodiment, the partition 97 is provided horizontally at the center of the liquid container 60c. It can also be said that the plurality of second channels 96 are formed by providing a plurality of ribs on the partition 97. Note that in other embodiments, the partition 97 may be omitted.
The identification portion 54 is mainly formed in the cover member 61a. The insertion potion 58 and the recess 53a are mainly formed in the bottom member 61b. In the present embodiment, the bottom member 61b is provided with a first protrusion 61c and a second protrusion 61d that protrude in the +T direction. The first protrusion 61c and the second protrusion 61d are provided at positions that sandwich the insertion potion 58 in the W direction. A first through hole 66c and a second through hole 66d are provided in a fixing portion 66s, of the liquid outlet member 66, that is provided at a portion that exposes in the −D direction from the bag 60, at positions that sandwich the liquid outlet portion 52. The first protrusion 61c is inserted into the first through hole 66c, and the second protrusion 61d is inserted into the second through hole 66d. A portion of the end portion of the bag 60 on the −D direction side is sandwiched between the cover member 61a and the bottom member 61b along with the fixing portion 66s of the liquid outlet member 66. With such a structure, the connection member 61 is attached to the one end portion 60a of the bag 60 so as to cover the liquid outlet member 66 and the portion of the one end portion 60a of the bag 60 from the outside.
The sealed portion 600 includes one end portion-side sealed portion 601 formed along the W direction at an end on the −D direction side. In the present embodiment, the first width W1, which is the width at at least the surrounding region PA of the connection member 61, of this one end portion-side sealed portion 601, is larger than the second width W2, which is the width of the sealed portion 600 at other end portions of the bag 60. The other end portions of the bag 60 are end portions excluding the one end portion 60a of the bag 60, and include the other end portion 60b, the end portion on the +W direction side, and the end portion on the −W direction side.
The surrounding region PA is a region, of the one end portion-side sealed portion 601, including portions adjacent to the connection member 61 in the W direction. The surrounding region PA may be in contact with the connection member 61 in the W direction, or may not be in contact therewith. The surrounding region PA may be in contact with the connection member 61 in the D direction, or may not be in contact therewith. The surrounding region PA may be overlapped with the connection member 61 in the T direction, or may not be overlapped therewith. The surrounding region PA is close enough to the connection member 61 such that another component or element cannot be interposed between the connection member 61 and the surrounding region PA. If the distance from the end of the connection member 61 in the −T direction to the one end portion-side sealed portion 601 is referred to as a “sealed portion height TA”, the surrounding region PA preferably includes, of the one end portion-side sealed portion 601 in the W direction, a portion extending from the end of the connection member 61 in the −W direction at a length corresponding to the sealed portion height TA in the −W direction, and a portion extending from the end of the connection member 61 in the +W direction at a length corresponding to the sealed portion height TA in the +W direction. Also, if the width of the connection member 61 along the W direction is referred to as a “connection member width WA”, the surrounding region PA preferably includes, of the one end portion-side sealed portion 601 in the W direction, a region extending from the end of the connection member 61 in the −W direction at a length corresponding to half of the connection member width WA in the −W direction, and a region extending from the end of the connection member 61 in the +W direction at a length corresponding to half of the connection member width WA in the +W direction, as shown in
The end on the +D direction side of a portion, of the one end portion-side sealed portion 601, having the first width W1 is located on the +D direction side relative to the end of the connection member 61 on the +D direction side. That is, in the D direction, the connection member 61 is provided on the −D direction side relative to the end of the one end portion-side sealed portion 601 on the +D direction side.
In the present embodiment, the one end portion-side sealed portion 601 includes two first corner portions C1 at the respective ends in the W direction. The third width W3, which is a width of the one end portion-side sealed portion 601 along the D direction, in the two first corner portions C1 is larger than the first width W1. In the present embodiment, the third width W3 increases toward the ends in the W direction. Note that, in other embodiments, the third width W3 in one first corner portion C1, of the two first corner portions C1, may be larger than the first width W1.
In the present embodiment, when the internal region of the liquid container 60c is equally divided in the D direction into three regions, the end of the internal rigid member 87, which is constituted by the coupling member 85 and the spacer member 90, on the +D direction side is located in a central region CA of the three regions. Also, in the present embodiment, when the internal region of the liquid container 60c is equally divided in the W direction into three regions, the internal rigid member 87 is located in a central region of the three regions. Note that, when the internal region of the liquid container 60c is equally divided in the D direction into five regions, the end of the internal rigid member 87 on the +D direction side may be located in a central region of the five regions. Also, the end of the internal rigid member 87 on the +D direction side may be located at a center of the internal region of the liquid container 60c.
According to the liquid container 20 of the present embodiment described above, the first width W1 of the sealed portion 600 of the bag 60 in the surrounding region PA of the connection member 61 is larger than the second width W2 of the other portions, and as a result, the connection member 61 can be kept from being influenced by a change in the thickness of the bag 60, which is caused by the thickness of the bag 60 being partially changed due to surface waviness and ripples of liquid inside the liquid container 60c. Therefore, the positional shift of the connection member 61 relative to the liquid ejection device 11 can be suppressed, and liquid can be stably supplied to the liquid ejection device 11. In particular, in the present embodiment, since the width of the bag 60 is large, the connection member 61 is easily influenced by surface waviness and ripples of liquid. However, in the present embodiment, since the first width W1 of the sealed portion 600 of the bag 60 in the surrounding region PA of the connection member 61 is larger than the second width W2 of the other portions, the connection member 61 can be effectively kept from being influenced by such a phenomenon.
Also, in the present embodiment, the one end portion-side sealed portion 601 includes the first corner portions C1 at the ends in the W direction, and the third width W3 of the sealed portion 600 in the first corner portions C1 is larger than the first width W1 in the surrounding region PA. Therefore, the stress due to the pressure of the liquid inside the liquid container 60c can be kept from being concentrated at the first corner portions C1 of the one end portion-side sealed portion 601. Therefore, the liquid can be suppressed from leaking out from the first corner portions C1 of the one end portion-side sealed portion 601.
Also, the liquid container 20 of the present embodiment includes the internal rigid member 87 that is connected to the liquid outlet member 66 and extends in the +D direction from the liquid outlet member 66 inside the liquid container 60c. Therefore, the connection member 61 can be kept from being influenced by surface waviness and ripples of the liquid, and the stress can be suppressed from accumulating in the internal rigid member 87. Therefore, damage to the internal rigid member 87 can be suppressed.
Also, in the present embodiment, when the internal region of the liquid container 60c is equally divided into three regions CA along the D direction, the end of the internal rigid member 87 in the +D direction is located in the central region CA of the three regions. Therefore, liquid can be easily supplied from the center of the liquid container 60c to the liquid outlet member 66. Therefore, liquid can be uniformly led out from the internal region of the liquid container 60c.
Also, in the present embodiment, the second corner portions C2 of the connection member 61 on the +D direction side have a chamfered shape. Therefore, if the liquid container 20 is dropped with the connection member 61 facing downward, and the liquid container 20 lands such that the bag 60 covers the connection member 61, or the like, the surface of the bag 60 can be kept from being damaged by coming into contact with the second corner portions C2 of the connection member 61 on the +D direction side.
Also, in the present embodiment, the leading end portion 323 of the liquid introduction needle 32 included in the liquid ejection device 11 is configured by combining the truncated cone 324 and the cone 325, and has a cone shape, as a whole, whose conical surface has a level difference. Therefore, when the liquid introduction needle 32 breaks a film FL provided in the liquid outlet member 66 of an un-used liquid container 20, a gap is generated between the liquid introduction needle 32 and the film FL, and with this, the ease of piercing the film FL with the leading end portion 323 can be improved. Therefore, the load to break the film FL can be reduced, and the liquid introduction needle 32 can be easily inserted into the liquid outlet member 66. Also, according to the present embodiment, since the liquid introduction needle 32 can be easily inserted into the liquid outlet member 66, the liquid introduction needle 32 can be kept in a stable state inside the liquid outlet member 66. Therefore, even if surface waviness and ripples occur in the liquid inside the bag 60, the liquid can be stably supplied from the liquid container 20 to the liquid ejection device 11.
Also, according to the liquid container 20 of the present embodiment, because the liquid outlet tubes 80 are provided inside the liquid container 60c provided in the bag 60, channels for liquid are secured in the vicinity of the liquid outlet tubes 80, and the channels inside the bag 60 are unlikely to be blocked. Also, the end portions of the liquid outlet tubes 80 on the +D direction side act as substantial supply ports, that is, supply ports for directly supplying liquid to the liquid ejection device 11, and the spacer member 90 is present on the depth direction side relative to the end portions of the liquid outlet tubes 80 on the +D direction side, and as a result, the end portions of the liquid outlet tubes 80 on the +D direction side and the channels on the deeper side are unlikely to be blocked. Moreover, since the inclined faces 91 are provided in the spacer member 90 on the deeper side in the direction along which the liquid flows when suctioned, the bag 60 is likely to collapse conforming to the shape of the inclined faces 91 from the deeper side to the near side, and the channels on the deeper side of the spacer member 90 are unlikely to be blocked. Therefore, according to the present embodiment, the likelihood that liquid cannot be sufficiently supplied to the liquid ejection device 11 when the bag 60 contracts can be reduced. Also, in the present embodiment, the first channels 95 and the second channels 96 are formed in the spacer member 90, and therefore the channels inside the liquid container 60c can be effectively kept from being blocked when the bag 60 contracts.
Also, in the present embodiment, the liquid outlet tubes 80 include the first channel portion 81 and the second channel portion 82, the first channel portion 81 suctions liquid with a low concentration, and the second channel portion 82 suctions liquid with a high concentration, and the liquid is supplied to the liquid ejection device 11 after mixing the liquid with a low concentration and the liquid with a high concentration in the liquid outlet portion 52, and as a result, the concentration of liquid to be supplied to the liquid ejection device 11 can be further stabilized.
Also, in the present embodiment, at least one of the lowermost portion of the spacer member 90 and the uppermost portion of the spacer member 90 is in contact with the internal face of the bag 60, in the attachment orientation, and therefore, the bag 60 tends to contract from the contact portion with the spacer member 90 in conformity with the shape of the inclined faces 91 of the spacer member 90, and the channels inside the liquid container 60c can be effectively suppressed from being blocked.
Also, in the present embodiment, the first leading end 81b of the first channel portion 81 and the second leading end 82b of the second channel portion 82 are fixed to the spacer member 90. Therefore, the positions of the first leading end 81b and the second leading end 82b, which are substantial supply ports, do not change. Also, when an impact is applied to the liquid container 20 as a result of the liquid container 20 being dropped when carried or the like, the liquid outlet tubes 80 are unlikely to be separated from the spacer member 90. Therefore, the concentration of liquid to be supplied to the liquid ejection device 11 can be further stabilized.
Also, in the present embodiment, the first base end 81a of the first channel portion 81 and the second base end 82a of the second channel portion 82 are aligned in the horizontal direction, in the attachment orientation, and the first leading end 81b and the second leading end 82b are aligned in the vertical direction. Therefore, the first leading end 81b and the second leading end 82b are unlikely to move in the W direction, and liquid can be suctioned from them at stable positions. Also, liquid suctioned from the first channel portion 81 is mixed with liquid suctioned from the second channel portion 82 after the flow is changed from the state of flowing side by side in the vertical direction to the state of flowing side by side in the horizontal direction, and as a result, the concentration of liquid to be supplied to the liquid ejection device 11 can be further stabilized.
Also, in the present embodiment, since the spacer member 90 is fixed to the liquid outlet member 66, the positional relationship between the spacer member 90 and the liquid outlet member 66 can be stabilized. Therefore, the likelihood of the concentration of liquid to be supplied to the liquid ejection device 11 changing depending on individual liquid containers 20 can be reduced.
Also, in the present embodiment, since the second channels 96 for causing liquid to flow in a direction that intersects the D direction are provided in the spacer member 90, liquid can be easily suctioned from directions other than the D direction. Therefore, when the concentration of liquid changes along a direction other than the D direction, the concentration of liquid to be supplied to the liquid ejection device 11 can be further stabilized.
Also, in the present embodiment, the spacer member 90 is provided with the partition 97, and the partition 97 is provided at a position between the first leading end 81b of the first channel portion 81 and the second leading end 82b of the second channel portion 82, in the T direction, and as a result, the liquid with a low concentration that is present on an upper side in the container 60c and the liquid with a high concentration that is present on a lower side are unlikely to be mixed in the vicinity of the first leading end 81b and the second leading end 82b. Therefore, it is possible to suppress a situation in which liquid with low concentration is suctioned from both the first leading end 81b and the second leading end 82b, and liquid with high concentration is unlikely to be suctioned. As a result, the concentration of liquid to be supplied to the liquid ejection device 11 can be further stabilized.
D-1: In the first embodiment, the third width W3, which is the width at the first corner portions C1 of the one end portion-side sealed portion 601 is larger than the first width W1 in the surrounding region PA. In contrast, the third width W3 at a corner portion of the one end portion-side sealed portion 601 may be the same as the first width W1 in the surrounding region PA, or smaller than the first width W1.
D-2: In the embodiments described above, an internal rigid member 87 is provided that extends from the liquid outlet member 66 in the +D direction inside the liquid container 60c. In contrast, the liquid container 20 may not include the internal rigid member 87. Also, in the embodiments described above, the internal rigid member 87 is constituted by the coupling member 85 and the spacer member 90, but the internal rigid member 87 may be constituted by only the coupling member 85.
D-3: In the embodiments described above, all of the four second corner portions C2 of the connection member 61 on the +D direction side have a chamfered shape, but some of the second corner portions C2 may be chamfered, or none of the second corner portions C2 may be chamfered.
D-4: The present disclosure can be applied to, not limited to an inkjet printer and a liquid container for supplying ink to the inkjet printer, any liquid ejection devices that eject liquid other than ink, and a liquid container that is used in such liquid ejection devices. For example, the present disclosure can be applied to the following various liquid ejection devices and liquid containers.
(1) Image recording apparatuses such as a facsimile apparatus
(2) Color material ejection recording apparatuses used to manufacture color filters for image display apparatuses such as a liquid crystal display
(3) Electrode material ejection apparatuses used to form electrodes for organic EL (Electro Luminescence) displays, field emission displays (FED), or the like
(4) Liquid consuming apparatuses that eject liquid containing biological organic matter used to manufacture biochips
(5) Sample ejection apparatuses serving as precision pipettes
(6) Lubricating oil ejection apparatuses
(7) Resin solution ejection apparatuses
(8) Liquid consuming apparatuses that perform pinpoint ejection of lubricating oil to precision machines such as a watch and a camera
(9) Liquid consuming apparatuses that eject a transparent resin solution such as a UV-cured resin solution onto substrates in order to form micro-hemispherical lenses (optical lenses) or the like used in optical communication elements or the like
(10) Liquid consuming apparatuses that eject acid or alkaline etchant in order to etch substrates or the like
(11) Liquid consuming apparatuses that include liquid consumption heads for discharging a very small amount of any other kind of droplet.
Note that the “droplet” refers to a state of the liquid discharged from liquid ejection devices, and includes droplets having a granular shape, a tear-drop shape, and a shape with a thread-like trailing end. The “liquid” mentioned here need only be a material that can be consumed by liquid ejection devices. For example, the “liquid” need only be a material in a state where a substance is in a liquid phase, and a liquid material having a high or low viscosity, sol, gel water, and other liquid materials such as inorganic solvent, organic solvent, solution, liquid resin, liquid metal, and metallic melt are also included as a “liquid”. Furthermore, the “liquid” is not limited to being a single-state substance, and also includes particles of a functional material made from solid matter, such as pigment or metal particles, that are dissolved, dispersed, or mixed in a solvent, or the like. Representative examples of the liquid include ink such as that described in the above embodiment, liquid crystal, or the like. Here, the “ink” encompasses general water-based ink and oil-based ink, as well as various types of liquid compositions such as gel ink and hot melt ink.
The present disclosure is not limited to the embodiments described above, and can be achieved with various configurations without departing from the gist of the invention. For example, the technical features in the embodiments that correspond to the technical features in the aspects described in the following can be replaced or combined as appropriate in order to solve some or all of the problems described above, or in order to achieve some or all of the above-described effects. A technical feature that is not described as essential in the specification can be deleted as appropriate.
(1) According to one aspect of the present disclosure, a liquid container for supplying liquid to a liquid ejection device is provided. The liquid container includes: when three directions that orthogonally intersect each other are denoted as a D direction, a T direction, and a W direction, a positive direction of the D direction is denoted as a +D direction, and the direction opposite to the +D direction is denoted as a −D direction, a direction in which the size of an external shape of the liquid container is smallest is the T direction, and a direction orthogonal to the D direction and the T direction is the W direction, the D direction and the W direction extending in a horizontal direction in a state in which the liquid container is attached to the liquid ejection device, a flexible bag provided with a liquid container that internally contains the liquid; a liquid outlet member attached to a one end portion of the bag on the −D direction side; and a connection member that is attached to the one end portion so as to cover the liquid outlet member and a portion of the one end portion from the outside. The bag includes a sealed portion on an outer periphery side relative to the liquid container, the sealed portion includes a one end portion-side sealed portion that is formed along the W direction at an end on the −D direction side, a first width, which is a width of the one end portion-side sealed portion in at least a surrounding region of the connection member, is larger than a second width, which is a width of the sealed portion at other ends of the bag, and an end, on the +D direction side, of a portion, of the one end portion-side sealed portion, having the first width is located on the +D direction side relative to an end of the connection member on the +D direction side.
According to the liquid container of such an aspect, since the width of the sealed portion of the bag in the surrounding region of the connection member that is attached to the one end portion of the bag is larger than the width of the sealed portion at other ends of the bag, the connection member is kept from being influenced by surface waviness and ripples of liquid inside the liquid container. Therefore, the positional shift of the connection member relative to the liquid ejection device can be suppressed, and ink can be stably supplied to the liquid ejection device.
(2) In the liquid container of the above-described aspect, the one end portion-side sealed portion may include a first corner portion at an end in the W direction, and a third width, which is a width of the one end portion-side sealed portion in the first corner portion, may be larger than the first width.
With the liquid container of such an aspect, because the stress can be kept from being concentrated in the vicinity of the first corner portion of the one end portion-side sealed portion, ink can be kept from leaking out from the bag.
(3) The liquid container of the above-described aspect may further include an internal rigid member that is coupled to the liquid outlet member, and extends in the +D direction from the liquid outlet member, inside the liquid container.
With the liquid container of such an aspect, the connection member can be suppressed from being influenced by surface waviness and ripples of the liquid, and the stress can be suppressed from accumulating in the internal rigid member. Therefore, the damage of the internal rigid member can be suppressed.
(4) In the liquid container of the above-described aspect, when an internal region of the liquid container is equally divided into three regions in the D direction, an end of the internal rigid member in the +D direction may be located in a central region of the three regions.
With the liquid container of such an aspect, liquid is easily supplied from the center of the liquid container to the liquid outlet member.
(5) In the liquid container of the above-described aspect, the connection member may include a second corner portion at an end in the +D direction and at an end in the W direction, and the second corner portion may have a chamfered shape.
With the liquid container of such an aspect, the surface of the bag can be suppressed from being damaged by the second corner portion of the connection member when the liquid container is dropped or the like.
(6) According to another aspect of the present disclosure, a liquid ejection device is provided to which a liquid container including a liquid outlet member is detachably attached. The liquid ejection device includes a hollow liquid introduction needle to be inserted into the liquid outlet member. A leading end portion of the liquid introduction needle is constituted by a combination of a truncated cone that has a first bottom face and an upper face whose diameter is smaller than that of the first bottom face, and a cone that is provided on the upper face of the truncated cone, and has a second bottom face whose diameter is smaller than that of the upper face of the truncated cone, and the central axis of the cone matches the central axis of the truncated cone.
According to the liquid ejection device of such an aspect, since the leading end portion of the liquid introduction needle is constituted by a combination of a truncated cone and a cone, the liquid introduction needle can be easily inserted into the liquid outlet member of the liquid container. Therefore, the liquid introduction needle can be kept in a stable state inside the liquid outlet member, and liquid can be stably supplied from the liquid container to the liquid ejection device.
The present disclosure can be realized in various aspects other than the aspects as the liquid container and the liquid ejection device described above. For example, the present disclosure can be realized in aspects such as a system including the liquid container and the liquid ejection device and a manufacturing method of the liquid container.
| Number | Date | Country | Kind |
|---|---|---|---|
| 2018-105797 | Jun 2018 | JP | national |
