JP2020055194A - Liquid discharge device - Google Patents

Abstract

To provide a liquid discharge device that can reduce a risk that liquid leaks out.SOLUTION: The liquid discharge device comprises: a liquid discharge head for discharging liquid; a supply flow path with a joint member 26, configured to be able to supply liquid to the liquid discharge head; a connection part to be connected with the joint member; and a holding member that can be fitted to the connection part. The holding member can be fitted to the connection part, in a state where the joint member is properly connected to the connection part.SELECTED DRAWING: Figure 6

Description

  The present invention relates to a liquid ejection device.

  Patent Literature 1 describes, as an example of a liquid ejection apparatus, a liquid ejecting apparatus including a joint member and a connecting portion to which the joint member is connected in a flow path where ink, which is a kind of liquid, flows. In this liquid ejecting apparatus, the liquid can be supplied to the liquid ejecting head that ejects the liquid by connecting the joint member to the connection portion.

JP 2017-81126 A

  In such a liquid ejection device, the joint member and the connection portion may not be correctly connected. In this case, there is a possibility that the liquid leaks from the middle of the flow path.

  A liquid discharge apparatus that solves the above-mentioned problem is configured such that a liquid discharge head that discharges a liquid, a liquid supply head that can supply the liquid to the liquid discharge head, a supply flow path that has a joint member, and a connection that connects the joint member. And a holding member that can be attached to the connection portion. The holding member can be attached to the connection portion in a state where the joint member is correctly connected to the connection portion.

FIG. 1 is a front view schematically showing an embodiment of a liquid ejection device. FIG. 3 is a perspective view showing a part of a supply channel. FIG. 3 is a perspective view showing a first flow path and a second flow path. FIG. 2 is a perspective view showing a joint member and a connection portion of the first embodiment. FIG. 4 is a perspective view showing a joint member, a connection portion, and a holding member. The perspective view which removed the joint member and the holding member from the connection part. The rear view of a holding member. The front view of a connection part. The rear view of a connection part. The front view of the connection part in which the joint member was inserted. The front view of the connection part to which the joint member was connected. The front view of the connection part to which the joint member is correctly connected. The front view of the connection part in which the joint member is not correctly connected. The perspective view showing the joint member, the connection part, and the holding member of a 2nd embodiment. The front view of a connection part. The rear view of a holding member. The front view of the connection part to which the joint member is correctly connected. The rear view of the connection part in which the joint member is not correctly connected. The perspective view showing the joint member, the connection part, and the holding member of a 3rd embodiment. The perspective view which removed the joint member and the holding member from the connection part.

  Hereinafter, an embodiment of a liquid ejection apparatus will be described with reference to the drawings. The liquid ejection device is, for example, an ink jet printer that records images such as characters and photographs by ejecting ink, which is an example of a liquid, onto a medium such as paper.

(1st Embodiment)
As shown in FIG. 1, the liquid ejection apparatus 11 can support the housing 12, the mounting portion 14 to which the liquid container 13 is detachably mounted, the cassette 15 that can store the medium 99, and the medium 99. A support base 16 and a control unit 100 are provided. The liquid container 13 is a container that can store a liquid. The cassette 15 is detachably attached to the housing 12. The control unit 100 includes, for example, a CPU, a memory, and the like. The control unit 100 controls the liquid ejection device 11 by causing a CPU to execute a program stored in a memory.

  The liquid ejection device 11 may include one or more extension units 17. The extension unit 17 is arranged, for example, below the housing 12. A cassette 18 capable of storing a medium 99 is attached to the extension unit 17.

  The mounting section 14 has a liquid introduction section 19 into which the liquid stored in the mounted liquid container 13 can be introduced. One or a plurality of liquid containers 13 are detachably attached to the attachment portion 14. The liquid container 13 is connected to the liquid introduction unit 19 by being mounted on the mounting unit 14.

  The plurality of liquid containers 13 may store different types of liquids, or may each store the same type of liquid. The mounting portion 14 of the present embodiment is capable of attaching and detaching the four liquid containers 13. The liquid container 13 of the present embodiment stores inks of different colors such as cyan, magenta, yellow, and black.

  The liquid ejection device 11 includes a liquid ejection head 21 that ejects a liquid, and a supply channel 22 configured to supply the liquid to the liquid ejection head 21. The liquid ejection head 21 and the supply channel 22 of the present embodiment are housed in the housing 12. The liquid discharge head 21 has one or more nozzles 23 that can discharge liquid. The liquid ejection head 21 ejects liquid toward the medium 99 supported by the support 16. Thus, an image is printed on the medium 99.

  The liquid ejection device 11 includes a carriage 24 that holds the liquid ejection head 21 and a guide shaft 25 that guides the movement of the carriage 24. The carriage 24 and the guide shaft 25 of the present embodiment are housed in the housing 12. The carriage 24 reciprocates along the guide shaft 25. The liquid ejection device 11 of the present embodiment is a serial printer in which the liquid ejection head 21 scans the medium 99. The liquid ejection device 11 may be configured as a line printer in which the liquid ejection head 21 is provided in a long length.

  The supply channel 22 extends so as to connect the mounting section 14 and the liquid ejection head 21. One or more supply channels 22 are provided. In the present embodiment, four supply channels 22 are provided corresponding to the number of the liquid containers 13 mounted on the mounting portion 14.

  The supply channel 22 has a joint member 26. The joint member 26 is provided, for example, to join the flow paths. The supply channel 22 of the present embodiment is configured by a plurality of channels. The supply channel 22 has, for example, a first channel 27, a second channel 28, and a third channel 29. The liquid in the liquid container 13 reaches the liquid ejection head 21 by flowing in the supply channel 22 in the order of the first channel 27, the second channel 28, and the third channel 29. Therefore, in the direction in which the liquid is supplied, the first flow path 27, the second flow path 28, and the third flow path 29 are located in this order from upstream to downstream. The number of flow paths constituting the supply flow path 22 may be one.

  The first flow path 27 is connected to the liquid introduction section 19. The third flow path 29 is connected to the liquid ejection head 21. The second flow path 28 is connected to the first flow path 27 and the third flow path 29. The joint member 26 of the present embodiment connects the first flow path 27 and the second flow path 28. Therefore, the first flow path 27 and the second flow path 28 are connected via the joint member 26. The joint member 26 is fixed to a downstream end of the first flow path 27.

  The joint member 26 may connect the liquid container 13 and the flow path, or may connect the flow path and the liquid ejection head 21. That is, the joint member 26 may connect the liquid container 13 and the first flow path 27 or may connect the third flow path 29 and the liquid ejection head 21. The joint member 26 may connect the second flow path 28 and the third flow path 29. Therefore, the joint member 26 may be located in the middle of the supply flow path 22 or at an end thereof.

  The first flow path 27 and the third flow path 29 of the present embodiment are formed of flexible tubes. The third flow path 29 can be deformed to follow the movement of the carriage 24 by being formed of a flexible tube.

  As shown in FIG. 2, the second flow path 28 of the present embodiment includes a flow path member 31 in which a groove 32 is formed, and a cover 33 attached to the flow path member 31 so as to cover the groove 32. Be composed. In the second flow path 28, the liquid flows through the groove 32. The flow path member 31 is made of, for example, a resin material. The cover 33 may be a plate made of a resin material or a film made of a resin material. The flow path member 31 and the cover 33 are attached to each other by, for example, laser welding, heat welding, ultrasonic welding, or the like.

  As shown in FIG. 3, the flow path member 31 has an introduction pipe 34 for introducing a liquid. The introduction pipe 34 communicates with the groove 32. The introduction pipe 34 forms an upstream end of the second flow path 28. The introduction pipe 34 is connected to the joint member 26. By connecting the joint member 26 to the introduction pipe 34, the first flow path 27 and the second flow path 28 are connected.

  The flow path member 31 has a discharge pipe 35 for discharging the liquid. The outlet pipe 35 communicates with the groove 32. The outlet pipe 35 forms a downstream end of the second flow path 28. The outlet pipe 35 is connected to the third flow path 29. When the third flow path 29 is connected to the outlet pipe 35, the second flow path 28 and the third flow path 29 are connected.

  The first flow path 27 may be composed of the flow path member 31 and the cover 33, similarly to the second flow path 28. The third flow path 29 may be composed of the flow path member 31 and the cover 33, similarly to the second flow path 28. The second flow path 28 may be formed of a flexible tube.

  The liquid ejection device 11 includes a connection portion 37 to which the joint member 26 is connected. The connection part 37 is configured to be able to connect one or a plurality of joint members 26. The connecting portion 37 of the present embodiment is configured to be able to connect the four joint members 26. By connecting the plurality of joint members 26 to the connection portion 37, the plurality of first flow paths 27 can be handled collectively. A plurality of connection portions 37 may be provided corresponding to the number of joint members 26. For example, one joint member 26 may be connected to one connection part 37.

  The liquid ejection device 11 includes a holding member 38 mounted on the connection portion 37 to which the joint member 26 is connected. The holding member 38 is attached to the connection part 37 after the joint member 26 is connected to the connection part 37. The holding member 38 is, for example, attached to the connecting portion 37 from the opposite side of the joint member 26. Therefore, the joint member 26 and the holding member 38 of the present embodiment are attached so as to sandwich the connecting portion 37. The joint member 26 is connected to the connecting portion 37 from one side, and the holding member 38 is attached to the connecting portion 37 from the other side opposite to the one side.

  The connection part 37 is attached to the flow path member 31 in a state where the holding member 38 is attached. By attaching the connection part 37 to the flow path member 31, the joint member 26 connected to the connection part 37 and the introduction pipe 34 are connected.

  The liquid ejection device 11 may include a fixing member 39 for fixing the flow path member 31 and the connection portion 37. The fixing member 39 is fixed in a state where the flow path member 31 and the connecting portion 37 are connected. The fixing member 39 has, for example, a screw 41 and a protection plate 42. In the present embodiment, two screws 41 are provided. The screw 41 is inserted into a through hole 43 of the flow path member 31 and a screw hole 44 of the connecting portion 37. The protection plate 42 is located between the head of the screw 41 and the flow path member 31. By interposing the protection plate 42, the flow path member 31 and the cover 33 are protected against the tightening of the screw 41, and the plurality of joint members 26 and the introduction pipe 34 can be connected.

  If the joint member 26 and the connection portion 37 are not correctly connected in the supply channel 22, the liquid may leak from the connection portion. Therefore, the holding member 38 can be attached to the connection portion 37 in a state where the joint member 26 is correctly connected to the connection portion 37. Conversely, when the joint member 26 and the connection portion 37 are not correctly connected, the holding member 38 cannot be attached to the connection portion 37. That is, whether or not the joint member 26 and the connection portion 37 are correctly connected can be grasped based on whether or not the holding member 38 can be attached to the connection portion 37.

  The connecting portion 37 may be configured to be able to connect the plurality of joint members 26, and the holding member 38 may be attachable in a state where the plurality of joint members 26 are correctly connected. In this case, the number of the connection portions 37 and the number of the holding members 38 need only be one for the plurality of joint members 26. Therefore, the number of components can be reduced as compared with the case where the same number of the holding members 38 are provided as the joint members 26 or the same number of the connection portions 37 as the joint members 26.

  A plurality of holding members 38 may be provided corresponding to the number of joint members 26. In this case, the holding member 38 can be mounted on the connection part 37 when the corresponding joint member 26 is correctly connected to the connection part 37.

  The joint member 26 may not be able to be disconnected from the connection portion 37 when the holding member 38 is mounted on the connection portion 37. In this way, it is possible to prevent the joint member 26 from being unexpectedly removed from the connection portion 37 in a state where the holding member 38 is mounted on the connection portion 37. In this case, the holding member 38 functions as a stopper for the joint member 26. The holding member 38 can hold the joint member 26 connected to the connecting portion 37 by being attached to the connecting portion 37.

Next, specific configurations of the joint member 26, the connection portion 37, and the holding member 38 in the first embodiment will be described.
As shown in FIG. 4, in the present embodiment, the joint members 26 are connected to the connecting portions 37 so as to be aligned. The screw holes 44 are located at both ends of the connection portion 37. The screw hole 44 is positioned so as to sandwich the joint member 26 connected to the connection portion 37 in the connection portion 37.

  The connecting portion 37 has a concave portion 45 that covers a part of the joint member 26. A part of the joint member 26 that is covered by the recess 45 is referred to as a connection part 46. The connection portion 46 includes one end of the joint member 26. Therefore, the concave portion 45 covers one end of the joint member 26 to be connected. When one end of the joint member 26 is inserted into the recess 45, the connection portion 46 is covered by the recess 45. The joint member 26 is connected to the connection part 37 by the connection part 46 contacting a part of the connection part 37 in the recess 45.

  The joint member 26 of the present embodiment is provided in a cylindrical shape. In the joint member 26, a portion different from the connection portion 46 is referred to as a shaft portion 47. The shaft portion 47 is a portion of the joint member 26 that is not covered by the concave portion 45 of the connection portion 37. The shaft portion 47 includes the other end opposite to one end. In the present embodiment, the diameter of the shaft portion 47 is formed smaller than the diameter of the connection portion 46.

  A groove 48 for guiding the joint member 26 is formed on the inner peripheral surface of the recess 45. When the joint member 26 is inserted into the recess 45, it is guided by the groove 48. Therefore, the groove 48 extends in the direction in which the joint member 26 is inserted into the recess 45. The direction in which the joint member 26 is inserted into the concave portion 45 matches the axial direction of the inserted joint member 26. In the present embodiment, two grooves 48 are provided in one recess 45. The two grooves 48 are arranged at symmetrical positions in the concave portion 45 when the connecting portion 37 is viewed from the axial direction of the joint member 26 connected to the connecting portion 37. Only one groove 48 may be provided in the concave portion 45, or three or more grooves 48 may be provided.

  A tube constituting the supply channel 22 is connected to an end of the joint member 26 opposite to an end connected to the connection portion 37. That is, the tube is connected to the other end opposite to the one end covered by the concave portion 45. In the present embodiment, a tube constituting the first flow path 27 is fixed to a shaft portion 47 different from the connection portion 46 in the joint member 26.

  As shown in FIGS. 5 and 6, the connection portion 37 has an insertion hole 51. In the connection portion 37, the surface on which the insertion hole 51 is provided is defined as the front surface. Therefore, the front surface of the connection portion 37 is a surface facing the flow path member 31. The insertion hole 51 is a hole into which the introduction tube 34 is inserted. In the present embodiment, a plurality of insertion holes 51 are provided, and are arranged so as to be arranged in a line at the connection portion 37. The insertion hole 51 is arranged so as to be sandwiched between the two screw holes 44 in the connection portion 37. The insertion hole 51 communicates with the recess 45. Therefore, when the connection part 37 is attached to the flow path member 31, the introduction pipe 34 enters the recess 45 through the insertion hole 51.

  The holding member 38 has an exposure hole 52. The exposure hole 52 is a hole that exposes the insertion hole 51 when the holding member 38 is mounted on the connection portion 37. The holding member 38 is mounted on the connecting portion 37 such that the exposed hole 52 overlaps the insertion hole 51 when the connecting portion 37 is viewed from the front. When the holding member 38 is attached to the connection portion 37, a surface facing the connection portion 37 is defined as a back surface of the holding member 38.

  The diameter of the exposure hole 52 of the present embodiment is larger than the diameter of the insertion hole 51. When the connection part 37 is attached to the flow path member 31, the introduction pipe 34 is inserted into the insertion hole 51 and the exposure hole 52. The holding member 38 of the present embodiment has the same number of exposed holes 52 as the insertion holes 51. The holding member 38 may have a smaller number of exposed holes 52 than the insertion holes 51. In this case, one exposure hole 52 exposes a plurality of insertion holes 51.

  As shown in FIG. 6, the joint member 26 has an introduction hole 53 into which the introduction tube 34 is inserted. When the introduction pipe 34 is inserted into the introduction hole 53, the first flow path 27 and the second flow path 28 are connected. The introduction hole 53 opens to the connection part 46. When the joint member 26 is inserted into the concave portion 45, the introduction hole 53 is located so as to overlap the insertion hole 51 when the connection portion 37 is viewed from the front. Therefore, when the connecting portion 37 is attached to the flow path member 31, the introduction pipe 34 is inserted into the exposure hole 52, the insertion hole 51, and the introduction hole 53.

  The joint member 26 has a convex part. When the joint member 26 is not correctly connected to the connection portion 37, the protrusion contacts the holding member 38, thereby preventing the holding member 38 from being attached to the connection portion 37. The protrusion does not hinder the mounting of the holding member 38 when the joint member 26 is correctly connected to the connection portion 37. The joint member 26 of the present embodiment has a projection 54 functioning as a projection.

  The protrusion 54 is provided on the outer peripheral surface of the joint member 26. The protrusion 54 is provided, for example, on the connection portion 46 and protrudes outward. In the present embodiment, two projections 54 are provided. The projections 54 are arranged at symmetrical positions in the connection portion 46 when the joint member 26 is viewed from the axial direction.

  The protrusion 54 is formed in a shape corresponding to the groove 48. When inserting the joint member 26 into the concave portion 45, the joint member 26 is inserted in a state where the position of the protrusion 54 and the position of the groove 48 are matched. Then, the joint member 26 is inserted into the concave portion 45 while the protrusion 54 is guided by the groove 48. When the position of the protrusion 54 is shifted from the position of the groove 48, the joint member 26 cannot be inserted into the recess 45 because the protrusion 54 contacts the edge of the recess 45.

  As shown in FIGS. 6 and 7, the holding member 38 has an insertion portion 55 that is inserted into the connection portion 37 when the holding member 38 is attached to the connection portion 37. One or more insertion portions 55 are provided. The holding member 38 of the present embodiment is formed of sheet metal. The insertion portion 55 is formed by bending an edge portion of the sheet metal.

  The insertion portion 55 has a hook 56 and a projecting piece 57. The hook 56 is a member for attaching the holding member 38 to the connection portion 37. When the hook 56 is hooked on a part of the holding member 38, the holding member 38 is attached to the connection portion 37. The protruding piece 57 is provided so as to protrude from a portion of the insertion portion 55 where the hook 56 is provided. The insertion portion 55 is located at a position overlapping the recess 45 when the connection portion 37 is viewed from the front in a state where the holding member 38 is mounted on the connection portion 37.

  As shown in FIG. 8, the connection section 37 has an insertion port 58. The insertion opening 58 is an opening into which the insertion portion 55 of the holding member 38 is inserted. The insertion opening 58 exposes a part of the recess 45. One or more insertion ports 58 are provided so as to correspond to the number of insertion parts 55.

  The connecting portion 37 has a holding portion 59 that can be fitted to the hook 56. The holding portion 59 is provided at a position corresponding to the insertion portion 55 inserted into the insertion port 58. When the insertion portion 55 is inserted into the insertion opening 58, the hook 56 and the holding portion 59 are fitted. The holding member 38 is mounted on the connecting portion 37 by fitting the hook 56 and the holding portion 59 together.

  As shown in FIGS. 8 and 9, the connecting portion 37 has a guide portion 61 provided on the inner peripheral surface of the concave portion 45 and a contact portion 62 provided so as to be continuous with the guide portion 61. The guide portion 61 guides the protrusion 54 that moves in the circumferential direction on the inner peripheral surface of the concave portion 45. The guide portion 61 protrudes inward from the inner peripheral surface of the concave portion 45. The guide portion 61 is provided on the inner peripheral surface of the concave portion 45 so as to extend in the circumferential direction. The guide portion 61 is provided so as to be continuous with the groove 48. The guide portion 61 guides the protrusion 54 guided by the groove 48.

  The contact portion 62 is provided on the inner peripheral surface of the concave portion 45. The contact portion 62 contacts the protrusion 54 guided by the guide portion 61. The contact portion 62 is formed of, for example, a wall with which the protrusion 54 contacts. The contact portion 62 is provided so as to be continuous with an end of the guide 61 that is opposite to the end that is continuous with the groove 48. The joint member 26 is correctly connected to the connection portion 37 by the protrusion 54 being in contact with the contact portion 62.

Next, a procedure for attaching the joint member 26 and the holding member 38 to the connection portion 37 will be described.
As shown in FIG. 10, first, the joint member 26 is inserted into the concave portion 45 in a state where the position of the projection 54 and the position of the groove 48 are aligned. At this time, the joint member 26 is inserted until one end thereof contacts the bottom surface of the concave portion 45. When the joint member 26 is in contact with the bottom surface of the concave portion 45, the projection 54 is located between the bottom surface of the concave portion 45 and the guide portion 61 in the axial direction of the joint member 26.

  Next, the joint member 26 inserted into the concave portion 45 is rotated. At this time, the joint member 26 is rotated around the axial direction of the joint member 26 so that the projection 54 approaches the contact portion 62. In the present embodiment, the joint member 26 is rotated in a counterclockwise direction in FIG.

  When the joint member 26 inserted into the concave portion 45 is rotated, the protrusion 54 moves in the circumferential direction on the inner peripheral surface of the concave portion 45. At this time, the projection 54 moves while being guided by the guide portion 61. The projection 54 is located at a position overlapping the guide portion 61 when the connection portion 37 is viewed from the front when guided by the guide portion 61.

  When the projection 54 and the guide portion 61 overlap when the connecting portion 37 is viewed from the front, the joint member 26 cannot be pulled out from the connecting portion 37 because the projection 54 is hooked on the guide portion 61. That is, the guide portion 61 functions as a stopper for preventing the joint member 26 from falling off from the connection portion 37. Therefore, in a state where the projection 54 and the guide portion 61 overlap, the joint member 26 is connected to the connection portion 37. In the present embodiment, when the position of the projection 54 matches the position of the groove 48 when the connecting portion 37 is viewed from the front, the joint member 26 can be inserted into and removed from the connecting portion 37.

  As shown in FIG. 11, when the joint member 26 inserted into the concave portion 45 is rotated, the protrusion 54 guided by the guide portion 61 finally contacts the contact portion 62. When the joint member 26 inserted into the concave portion 45 is rotated by a predetermined angle, the protrusion 54 moves from a position overlapping the groove 48 to a position contacting the contact portion 62. When the projection 54 comes into contact with the contact portion 62, the joint member 26 is correctly connected to the connection portion 37. Even when the projection 54 and the guide portion 61 overlap when the connection portion 37 is viewed from the front, if the projection 54 is not in contact with the contact portion 62, the connection of the joint member 26 to the connection portion 37 is insufficient. That is, the joint member 26 is not correctly connected to the connection portion 37.

  As shown in FIG. 12, after connecting the joint member 26 to the connection portion 37, the holding member 38 is attached to the connection portion 37. In order to attach the holding member 38 to the connection portion 37, the insertion portion 55 of the holding member 38 is inserted into the insertion port 58 of the connection portion 37. In the present embodiment, when the holding member 38 is mounted on the connection portion 37, the insertion portion 55 is located at a position overlapping the groove 48 when the connection portion 37 is viewed from the front. In particular, when attaching the holding member 38 to the connecting portion 37, the projecting piece 57 is located at a position overlapping the end of the guide portion 61 near the groove 48 when the connecting portion 37 is viewed from the front.

  When the joint member 26 is correctly connected to the connection portion 37, when the connection portion 37 is viewed from the front, the projection 54, which is a convex portion, does not overlap with the protruding piece 57 of the insertion portion 55. At this time, the projection 54 is located at a position overlapping the end of the guide portion 61 near the contact portion 62 when the connection portion 37 is viewed from the front. On the other hand, the protruding piece 57 is located at a position overlapping the end of the guide portion 61 near the groove 48 when the connecting portion 37 is viewed from the front. Therefore, when the joint member 26 is correctly connected to the connecting portion 37, the projection 54 does not contact the protruding piece 57 when the holding member 38 is mounted on the connecting portion 37. That is, attachment of the holding member 38 to the connection portion 37 is not hindered. Thereby, when the joint member 26 is correctly connected to the connection portion 37, the holding member 38 can be attached to the connection portion 37.

  In a state where the holding member 38 is mounted on the connection portion 37, the projection 54, which is a convex portion, is located at a position sandwiched between the contact portion 62 and the insertion portion 55. Since the protrusion 54 is sandwiched between the contact portion 62 and the insertion portion 55, the protrusion 54 is prevented from moving in the circumferential direction on the inner peripheral surface of the recess 45. That is, the rotation of the joint member 26 connected to the connection portion 37 is suppressed by the holding member 38. For this reason, the holding member 38 functions as a rotation stopper for the joint member 26. As a result, the joint member 26 is prevented from falling out of the connecting portion 37 unexpectedly.

  As shown in FIG. 13, when the joint member 26 is not correctly connected to the connection portion 37, when the connection portion 37 is viewed from the front, the projection 54, which is a convex portion, and the protruding piece 57 of the insertion portion 55 are formed. May overlap. In this case, the insertion portion 55 cannot be inserted into the insertion port 58 due to the protruding piece 57 contacting the projection 54, so that the holding member 38 cannot be attached to the connection portion 37. That is, when the joint member 26 is not correctly connected to the connection portion 37, the projection 54 serving as a convex portion prevents the holding member 38 from being attached to the connection portion 37. In this manner, whether or not the joint member 26 is correctly connected to the connection portion 37 can be grasped based on whether or not the holding member 38 can be attached to the connection portion 37.

Next, the operation and effects of the first embodiment will be described.
(1) The holding member 38 can be mounted on the connection portion 37 in a state where the joint member 26 is correctly connected to the connection portion 37. That is, when the holding member 38 can be attached to the connection portion 37 to which the joint member 26 is connected, it can be understood that the joint member 26 is correctly connected to the connection portion 37. Conversely, when the holding member 38 cannot be attached to the connection portion 37 to which the joint member 26 is connected, it can be understood that the joint member 26 is not correctly connected to the connection portion 37. Thus, when attaching the holding member 38 to the connection portion 37 to which the joint member 26 is connected, it is possible to grasp whether or not the joint member 26 is correctly connected to the connection portion 37. Thereby, it is possible to suppress the liquid from leaking due to the joint member 26 not being correctly connected to the connection portion 37.

  (2) When the holding member 38 is attached to the connection portion 37, the joint member 26 cannot be disconnected from the connection portion 37. Thereby, it is possible to prevent the joint member 26 from unexpectedly falling off from the connection portion 37.

  (3) When the joint member 26 is not correctly connected to the connection portion 37, the projection 54 contacts the holding member 38, thereby preventing the holding member 38 from being attached to the connection portion 37. In this case, whether or not the joint member 26 is correctly connected to the connection portion 37 can be grasped based on whether or not the projection 54 inhibits the attachment of the holding member 38 to the connection portion 37.

  (4) When the joint member 26 is rotated in a state where a part of the joint member 26 is covered with the concave portion 45, the protrusion 54 moves in the circumferential direction on the inner peripheral surface of the concave portion 45 while being guided by the guide portion 61. When the joint member 26 is sufficiently rotated, the protrusion 54 comes into contact with the contact portion 62 connected to the guide portion 61. Conversely, when the rotation of the joint member 26 inserted into the concave portion 45 is insufficient, the projection 54 does not contact the contact portion 62. Thus, whether or not the joint member 26 is correctly connected to the connection portion 37 can be grasped based on whether or not the projection 54 is in contact with the contact portion 62.

  (5) The protrusion 54 is located at a position sandwiched between the contact portion 62 and the insertion portion 55 when the holding member 38 is mounted on the connection portion 37. In this case, the insertion portion 55 prevents the protrusion 54 from moving away from the contact portion 62 when the holding member 38 is mounted on the connection portion 37. Thereby, it is possible to prevent the joint member 26 from unexpectedly falling off from the connection portion 37.

  (6) A tube forming the supply flow path 22 is connected to the end of the joint member 26 opposite to the end connected to the connection portion 37. This allows the joint member 26 to be used as a tube joint.

  (7) The connecting portion 37 is configured to be able to connect the plurality of joint members 26, and in a state where the plurality of joint members 26 are correctly connected, the holding member 38 can be mounted. In this case, since the number of the connection portions 37 and the number of the holding members 38 need only be one for the plurality of joint members 26, the number of components can be reduced.

(2nd Embodiment)
Next, a liquid ejection apparatus 11 according to a second embodiment will be described. The second embodiment differs from the first embodiment in the configuration of the connecting portion and the holding member, and the other configurations are the same as those in the first embodiment. Therefore, in the second embodiment, points different from the first embodiment will be mainly described.

  As shown in FIG. 14, the connecting portion 65 in the second embodiment is capable of mounting a holding member 66 thereon. The holding member 66 in the second embodiment is mounted on the connection part 65 to which the joint member 26 is connected. The holding member 66 has an insertion portion 67 that is inserted into the insertion port 58 when the holding member 66 is attached to the connection portion 65. The shape of the insertion part 67 of the second embodiment is different from the shape of the insertion part 55 of the first embodiment.

  As shown in FIG. 15, the connection section 65 has a hook 68. The hook 68 is a member for attaching the holding member 66 to the connection portion 65. When the hook 68 is hooked on a part of the holding member 66, the holding member 66 is attached to the connection portion 65. One or more hooks 68 are provided. The hook 68 is provided at a position corresponding to the insertion port 58.

  As shown in FIG. 16, the holding member 66 has a holding portion 69 that can be fitted with the hook 68. One or more holding portions 69 are provided so as to correspond to the number of hooks 68. The holding portion 69 is provided at a position corresponding to the insertion portion 55. When the insertion portion 67 is inserted into the insertion opening 58, the hook 68 and the holding portion 69 are fitted. The holding member 66 is attached to the connection portion 65 by fitting the hook 68 and the holding portion 69 together.

  As shown in FIG. 17, some of the insertion portions 67 of the plurality of insertion portions 67 have a configuration in which the holding member 66 is mounted on the connection portion 65 and the connection portion 65 is viewed from the front. It is located at a position overlapping with the recess 45. In the present embodiment, the insertion portion 67 is located at a position overlapping the groove 48 in the concave portion 45 when the connection portion 65 is viewed from the front. Specifically, the insertion portion 67 is located at a position overlapping the end of the guide portion 61 near the groove 48 when the connection portion 65 is viewed from the front.

  When the joint member 26 is correctly connected to the connection portion 65, when the connection portion 65 is viewed from the front, the projection 54, which is a convex portion, does not overlap with the insertion portion 67. At this time, the projection 54 is located at a position overlapping the end of the guide portion 61 near the contact portion 62 when the connection portion 65 is viewed from the front. On the other hand, the insertion portion 67 is located at a position overlapping the end of the guide portion 61 near the groove 48 when viewed from the axial direction of the joint member 26. Therefore, when the joint member 26 is correctly connected to the connection portion 65, the projection 54 does not contact the insertion portion 67 when the holding member 66 is mounted on the connection portion 65. That is, attachment of the holding member 66 to the connection portion 65 is not hindered. Thus, when the joint member 26 is correctly connected to the connection portion 65, the holding member 66 can be attached to the connection portion 65.

  In a state where the holding member 66 is mounted on the connection portion 65, the projection 54, which is a projection, is located at a position sandwiched between the contact portion 62 and the insertion portion 67. Since the protrusion 54 is sandwiched between the contact portion 62 and the insertion portion 67, the movement of the protrusion 54 in the circumferential direction on the inner peripheral surface of the concave portion 45 is suppressed. That is, the rotation of the joint member 26 connected to the connection portion 65 is suppressed by the holding member 66. For this reason, the holding member 66 functions as a rotation stopper for the joint member 26. Thereby, the joint member 26 is prevented from being accidentally removed from the connection portion 65.

  As shown in FIG. 18, when the joint member 26 is not correctly connected to the connection portion 65, when the connection portion 65 is viewed from the front, the projection 54, which is a convex portion, and the insertion portion 67 may overlap. . In this case, the insertion member 67 cannot be inserted into the insertion port 58 due to the contact of the insertion portion 67 with the projection 54, so that the holding member 66 cannot be attached to the connection portion 65. That is, when the joint member 26 is not correctly connected to the connection portion 65, the protrusion 54 serving as a convex portion prevents the holding member 66 from being mounted on the connection portion 65. In this manner, whether or not the joint member 26 is correctly connected to the connection portion 65 can be grasped based on whether or not the holding member 66 can be attached to the connection portion 65.

According to the second embodiment, the same effects as those of (1) to (7) can be obtained.
(Third embodiment)
Next, a liquid ejection apparatus 11 according to a third embodiment will be described. In the third embodiment, the configuration of the holding member is different from that of the first embodiment, and the other configuration is the same as that of the first embodiment. Therefore, in the third embodiment, the points different from the first embodiment will be mainly described.

  As shown in FIGS. 19 and 20, the holding member 71 in the third embodiment is attached from one of the connection portions 37 similarly to the joint member 26. That is, the holding member 71 is attached from the back surface of the connection portion 37.

  The joint member 26 has a protrusion 72 that is a protrusion. In the third embodiment, the protrusion 72 instead of the protrusion 54 functions as a protrusion. Therefore, when the joint member 26 is not correctly connected to the connecting portion 37, the projecting portion 72 contacts the holding member 71, thereby preventing the holding member 71 from being attached to the connecting portion 37. The protrusion 72 is provided on the outer peripheral surface of the joint member 26. The protruding portion 72 is provided on the shaft portion 47 and protrudes outward.

The holding member 71 is formed of, for example, a resin sheet. The holding member 71 is attached to the connection portion 37 by, for example, an adhesive.
The holding member 71 has a first notch 73. The first notch 73 is a notch in which the joint member 26 connected to the connection portion 37 fits. Therefore, the first notch 73 is formed in a shape corresponding to the shape of the shaft portion 47 of the joint member 26. The first notch 73 of the present embodiment is formed in an arch shape. The first notch 73 contacts the outer peripheral surface of the shaft portion 47 of the joint member 26 connected to the connecting portion 37 when the holding member 71 is mounted on the connecting portion 37.

  The holding member 71 has a second notch 74 connected to the first notch 73. The second notch 74 is formed so as to be depressed from the first notch 73. The second notch 74 is a notch in which the protruding portion 72, which is a convex portion, fits. Therefore, the second notch 74 is formed in a shape corresponding to the shape of the protruding portion 72 that is a convex portion.

  The second notch 74 is formed at a position on the holding member 71 attached to the connection portion 37 where the connection portion 37 overlaps with the protrusion 72 of the joint member 26 correctly connected to the connection portion 37 when the connection portion 37 is viewed from the front. Is done. That is, the second notch 74 is provided at a position overlapping the protrusion 72 when the protrusion 54 contacts the contact portion 62.

  When the joint member 26 is correctly connected to the connection portion 37, when the connection portion 37 is viewed from the front, the position of the protrusion 72 of the joint member 26 and the position of the second notch 74 of the holding member 71 match. . Therefore, when the joint member 26 is correctly connected to the connection portion 37, the holding member 71 can be attached to the connection portion 37 such that the protrusion 72 fits into the second cutout 74.

  When the holding member 71 is mounted on the connection portion 37, the joint member 26 connected to the connection portion 37 cannot rotate because the protrusion 72 is fitted into the second cutout 74. That is, the holding member 71 functions as a rotation stopper that suppresses rotation of the joint member 26 connected to the connection portion 37. This suppresses accidental removal of the joint member 26 from the connection portion 37.

  When the joint member 26 is not correctly connected to the connection portion 37, the position of the protrusion 72 does not match the position of the second notch 74 when the connection portion 37 is viewed from the front. Therefore, when the joint member 26 is not correctly connected to the connection portion 37, the protrusion 72, which is a protrusion, comes into contact with the holding member 71, thereby preventing the holding member 71 from being attached to the connection portion 37. I do. That is, when the joint member 26 is not correctly connected to the connection portion 37, the protrusion 72, which is a convex portion, prevents the holding member 71 from being mounted on the connection portion 37. Thus, whether or not the joint member 26 is correctly connected to the connection portion 37 can be grasped based on whether or not the holding member 71 can be attached to the connection portion 37.

According to the third embodiment, the following effects can be obtained in addition to the effects similar to the above (1), (2), (4), (6) and (7).
(8) When the joint member 26 is not correctly connected to the connecting portion 37, the projecting portion 72 contacts the holding member 71 to prevent the holding member 38 from being attached to the connecting portion 37. Accordingly, the attachment of the holding member 71 to the connection portion 37 to which the joint member 26 is not correctly connected is inhibited, so that it is possible to grasp whether the joint member 26 is correctly connected to the connection portion 37.

  (9) The holding member 71 is mounted on the connection portion 37 such that the protrusion 72 of the joint member 26 connected to the connection portion 37 fits into the second cutout 74. Therefore, the holding member 71 suppresses the rotation of the joint member 26 by being attached to the connection portion 37. Thereby, it is possible to prevent the joint member 26 from unexpectedly falling off from the connection portion 37.

This embodiment can be implemented with the following modifications. The present embodiment and the following modified examples can be implemented in combination with each other within a technically consistent range.
-The structure of the joint member, the connecting portion, and the holding member is not limited to the structures described in the first embodiment, the second embodiment, and the third embodiment. When the convex portion provided on the joint member is not located at the correct position, that is, when the joint member is not correctly connected to the connecting portion, the holding member comes into contact with the convex portion so that the holding member is attached to the connecting portion. Any configuration that cannot be used is acceptable. In addition, when the holding member is attached to the connecting portion, any configuration may be used as long as the holding member prevents the movement of the protrusion, that is, the configuration prevents the connection of the joint member from the connecting portion.

-The holding member may be attached to the connection portion using a screw, or may be attached to the connection portion using a tape.
The medium 99 is not limited to paper, but may be a plastic film, a metal film, a cloth, or the like.

  The liquid ejected by the liquid ejection head 21 is not limited to ink, and may be, for example, a liquid material in which particles of a functional material are dispersed or mixed in the liquid. For example, the liquid ejection head 21 may eject a liquid material containing a material such as an electrode material or a pixel material used in the manufacture of a liquid crystal display, an electroluminescence display, a surface-emitting display, or the like in a dispersed or dissolved form.

In the following, the technical ideas and the operational effects obtained from the above-described embodiments and modified examples will be described.
A liquid discharge device configured to discharge the liquid, a liquid discharge head configured to supply the liquid to the liquid discharge head, a supply channel having a joint member, a connection portion to which the joint member is connected, and the connection portion; And a holding member that can be mounted on the connection portion, wherein the holding member can be mounted on the connection portion in a state where the joint member is correctly connected to the connection portion.

  According to this configuration, when the holding member can be attached to the connection portion to which the joint member is connected, it can be understood that the joint member is correctly connected to the connection portion. Conversely, when the holding member cannot be attached to the connection portion to which the joint member is connected, it can be understood that the joint member is not correctly connected to the connection portion. Thus, when attaching the holding member to the connection portion to which the joint member is connected, it is possible to grasp whether or not the joint member is correctly connected to the connection portion. Thereby, it is possible to suppress the liquid from leaking due to the joint member not being connected to the connecting portion correctly.

In the liquid ejecting apparatus, the joint member may not be able to be disconnected from the connection part in a state where the holding member is mounted on the connection part.
According to this configuration, in a state where the holding member is attached to the connection portion, it is possible to suppress the joint member from unexpectedly falling out of the connection portion.

  In the liquid ejection device, the joint member has a protrusion, and when the joint member is not correctly connected to the connection portion, the holding member contacts the protrusion, whereby the holding member The attachment to the connection portion may be hindered.

According to this configuration, whether or not the joint member is correctly connected to the connection portion can be grasped based on whether or not the protrusion inhibits attachment of the holding member to the connection portion.
In the liquid ejection device, the convex portion is provided on an outer peripheral surface of the joint member, and the connecting portion is provided on a concave portion that covers a part of the joint member, and is provided on an inner peripheral surface of the concave portion. A guide portion that guides the convex portion that moves in the circumferential direction on the peripheral surface, and a contact portion that is provided so as to be continuous with the guide portion and that contacts the convex portion guided by the guide portion, The joint member may be correctly connected to the connection portion by the protrusion being in contact with the contact portion.

  According to this configuration, when the joint member is rotated in a state where the joint member is partially covered with the concave portion, the convex portion moves in the circumferential direction on the inner peripheral surface of the concave portion while being guided by the guide portion. When the joint member is sufficiently rotated, the convex portion comes into contact with the contact portion connected to the guide portion. Conversely, when the rotation of the joint member inserted into the concave portion is insufficient, the convex portion does not contact the contact portion. Thus, whether or not the joint member is correctly connected to the connection portion can be grasped based on whether or not the protrusion is in contact with the contact portion.

  In the liquid ejection device, the holding member has an insertion portion that is inserted into the connection portion when the holding member is mounted on the connection portion, and the protrusion has a state in which the holding member is mounted on the connection portion. It may be located at a position between the contact portion and the insertion portion in the circumferential direction.

  According to this configuration, the insertion portion prevents the protrusion from moving away from the contact portion in a state where the holding member is attached to the connection portion. Thereby, it can suppress that a joint member falls out of a connection part abruptly.

In the liquid ejection device, a tube constituting the supply flow path may be connected to an end of the joint member opposite to an end connected to the connection portion.
According to this configuration, the joint member can be used as a joint for the tube.

  In the liquid ejection device, the connection portion may be configured to be able to connect the plurality of joint members, and may be configured to be able to mount the holding member in a state where the plurality of joint members are correctly connected.

  According to this configuration, the number of the connection portions and the number of the holding members need only be one for the plurality of joint members, so that the number of components can be reduced.

  DESCRIPTION OF SYMBOLS 11 ... Liquid discharge apparatus, 12 ... Housing, 13 ... Liquid container, 14 ... Mounting part, 15 ... Cassette, 16 ... Support base, 17 ... Extension unit, 18 ... Cassette, 19 ... Liquid introduction part, 21 ... Liquid discharge Head, 22: supply channel, 23: nozzle, 24: carriage, 25: guide shaft, 26: joint member, 27: first channel, 28: second channel, 29: third channel, 31: channel Road member, 32 groove, 33 cover, 34 inlet pipe, 35 outlet pipe, 37 connection part, 38 holding member, 39 fixing member, 41 screw, 42 protection plate, 43 through hole, 44 ... screw hole, 45 ... concave part, 46 ... connection part, 47 ... shaft part, 48 ... groove, 51 ... insertion hole, 52 ... exposure hole, 53 ... introduction hole, 54 ... projection, 55 ... insertion part, 56 ... Hook, 57 ... projecting piece, 58 ... insertion port, 59 ... holding part, 61 ... guide part, 62 ... Touching portion, 65 connecting portion, 66 holding member, 67 insertion portion, 68 hook, 69 holding portion, 71 holding member, 72 projecting portion, 73 first cutout, 74 second cutout, 99: medium, 100: control unit.

Claims (7)

A liquid ejection head for ejecting liquid,
A supply flow path configured to be able to supply the liquid to the liquid ejection head and having a joint member;
A connection portion to which the joint member is connected,
Holding member attachable to the connection portion,
The liquid ejecting apparatus according to claim 1, wherein the holding member is mountable to the connection part when the joint member is correctly connected to the connection part.   2. The liquid ejection device according to claim 1, wherein the joint member cannot be disconnected from the connection portion when the holding member is attached to the connection portion. 3. The joint member has a convex portion,
When the joint member is not correctly connected to the connection portion, the holding member comes into contact with the protrusion, thereby preventing the holding member from being mounted on the connection portion. The liquid ejection device according to claim 1 or 2, wherein The protrusion is provided on an outer peripheral surface of the joint member,
A concave portion covering a part of the joint member; a guide portion provided on an inner peripheral surface of the concave portion, for guiding the convex portion moving in a circumferential direction on the inner peripheral surface of the concave portion; A contact portion that is provided so as to be continuous with the portion and contacts the convex portion guided by the guide portion,
The liquid ejection device according to claim 3, wherein the joint member is correctly connected to the connection portion by the contact of the protrusion with the contact portion. The holding member has an insertion portion that is inserted into the connection portion when mounted on the connection portion,
The said convex part is located in the position pinched by the said contact part and the said insertion part in the said circumferential direction in the state in which the said holding member was attached to the said connection part, The claim of Claim 4 characterized by the above-mentioned. Liquid ejection device.   The tube which comprises the said supply flow path is connected to the edge part opposite to the edge part connected to the said connection part in the said joint member, The Claim 1 characterized by the above-mentioned. A liquid ejection device according to claim 1.   The said connection part is comprised so that connection of the said several coupling member is possible, and when the said several coupling member is connected correctly, the said holding member can be mounted | worn, The Claims 1-6 characterized by the above-mentioned. The liquid ejection device according to any one of the above.