Printer

Abstract

To provide a printer which enables easy replacement of a head.SOLUTION: A printer includes a discharge unit. The discharge unit has a body module 35 and a head module 36. The body module has a main holding member 38, a circuit board, a first connection member 52, and a first engagement member 58. The head module has a sub holding member, a head 65, a second connection member 74, and a second engagement member 81. The first connection member has a first wiring portion and a first connection portion 54 fixed to the first engagement member. The second connection member has a second wiring portion 75 and a second connection portion 76 fixed to the second engagement member. The second engagement member engages with the first engagement member to install the sub holding member on the main holding member. The second engagement member engages with the first engagement member to connect the second connection portion with the first connection portion.SELECTED DRAWING: Figure 16

Description

[Technical Field]

[0001] The present invention relates to a printing device. [Background technology]

[0002] Patent Document 1 describes a printing device equipped with a discharge unit that prints an image on a medium by discharging a liquid onto the medium. The discharge unit has a circuit board, a first holding member that holds the circuit board, a flow path member through which the liquid flows, a head attached to the flow path member, and a second holding member that holds the flow path member and the head. The first holding member and the second holding member are detachable from each other. The discharge unit has a connection member that transmits an electrical signal by connecting the circuit board and the head. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2015-58620 Summary of the Invention [Problem to be solved by the invention]

[0004] In the printing device described in Patent Document 1, when replacing the head, the second holding member is detached from the first holding member. At this time, in addition to detaching the second holding member, the connecting member also needs to be detached, which can make the work complicated. [Means for solving the problem]

[0005] A printing device that solves the above problem includes a discharge unit that prints an image on a medium by discharging a liquid, the discharge unit having a main body module and a head module configured to be detachable from the main body module, the main body module having a main holding member, a circuit board attached to the main holding member, a first connecting member extending from the circuit board, and a first engaging member attached to the main holding member, and the head module having a sub-holding member configured to be detachable from the main holding member, a head attached to the sub-holding member, and a second connecting member extending from the head. and a second engaging member attached to the sub-holding member, wherein the first connecting member has a first wiring portion extending from the circuit board and a first connecting portion attached to the first wiring portion and fixed to the first engaging member, and the second connecting member has a second wiring portion extending from the head and a second connecting portion attached to the second wiring portion and fixed to the second engaging member, wherein the sub-holding member is attached to the main holding member by engaging the second engaging member with the first engaging member, and the second connecting portion is connected to the first connecting portion by engaging the second engaging member with the first engaging member. [Brief explanation of the drawings]

[0006] [Figure 1] FIG. 1 is a side view showing an embodiment of a printing device. [Figure 2] FIG. 2 is a perspective view of the discharge unit. [Figure 3] FIG. 3 is a perspective view of the state shown in FIG. 2 with the head module removed. [Figure 4] FIG. 4 is a perspective view of the flow path member and the head plate. [Figure 5] FIG. 5 is a perspective view of the state shown in FIG. 4 with the flow path member removed. [Figure 6] FIG. 6 is an enlarged view of FIG. [Figure 7] FIG. 7 is an enlarged view of FIG. [Figure 8] FIG. 8 is a front view of FIG. [Figure 9] FIG. 9 is a cross-sectional view of the head module attached to the main body module. [Figure 10] FIG. 10 is a front view of the first connecting member and the first engaging member. [Figure 11] FIG. 11 is a perspective view of the first connecting member and the first engaging member. [Figure 12] FIG. 12 is a perspective view of the head module. [Figure 13] FIG. 13 is an exploded perspective view of the head module. [Figure 14] FIG. 14 is a bottom view of the head module. [Figure 15] FIG. 15 is a cross-sectional view of the head module immediately before it is attached to the main body module. [Figure 16] FIG. 16 is a perspective view of the head module before it is attached to the main body module. [Figure 17] FIG. 17 is a perspective view of the head module being attached to the main body module. [Figure 18] FIG. 18 is a perspective view of the head module after it has been attached to the main body module. [Figure 19] FIG. 19 is a perspective view of a head module having a head cover. [Figure 20] FIG. 20 is a perspective view of the state shown in FIG. 19 with the head cover removed. DETAILED DESCRIPTION OF THE INVENTION

[0007] An embodiment of a printing device will be described below with reference to the drawings. The printing device is, for example, an inkjet printer that prints images such as text and photographs by ejecting ink, which is an example of a liquid, onto a medium such as paper, fabric, or film.

[0008] <Printing device> As shown in FIG. 1, the printing device 11 includes a housing 12. The printing device 11 includes a feeding unit 13. The feeding unit 13 is housed in the housing 12. The feeding unit 13 is configured to feed out a medium 99. More specifically, the feeding unit 13 feeds out a long length of medium 99 from a roll R1. The roll R1 is an article in which the medium 99 is wound up and stacked. The feeding unit 13 is configured to hold the roll R1. The feeding unit 13 holds the roll R1 rotatably.

[0009] The unwinding unit 13 has a unwinding spindle 14. The unwinding unit 13 rotatably holds the roll R1 by inserting the unwinding spindle 14 into the roll R1. The unwinding spindle 14 may be configured to rotate together with the roll R1, or may be configured to be non-rotatable. The unwinding spindle 14 may be configured to rotate by the power of a motor (not shown), or may be configured to rotate passively as the medium 99 is pulled.

[0010] The printing device 11 includes a winding unit 15. The winding unit 15 is housed in the housing 12. The winding unit 15 is configured to wind up the medium 99. The winding unit 15 forms a roll R1 by winding up the medium 99. The winding unit 15 is configured to hold the roll R1. The winding unit 15 holds the roll R1 rotatably.

[0011] The winding unit 15 has a winding shaft 16. The winding shaft 16 is configured to rotate together with the roll body R1. The winding shaft 16 is configured to rotate by the power of a motor (not shown). The winding unit 15 winds up the medium 99 as the winding shaft 16 rotates.

[0012] The printing device 11 includes a support unit 17. The support unit 17 is housed in the housing 12. The support unit 17 is configured to support the medium 99. The support unit 17 supports the medium 99 from the time the medium 99 is unwound from the unwinding unit 13 to the time the medium 99 is wound up by the winding unit 15.

[0013] The support unit 17 may be configured to rotate. In one example, the support unit 17 is a support drum. The support unit 17 has a cylindrical shape. The support unit 17 has a rotation axis 18. The support unit 17 is configured to rotate around the rotation axis 18. The support unit 17 may be rotated by the power of a motor (not shown), or may be rotated by being driven as the medium 99 is transported. The support unit 17 has a circumferential surface 19. The medium 99 is wound around the support unit 17 along the circumferential surface 19. The support unit 17 supports the wound medium 99. An image is printed on the medium 99 on the support unit 17.

[0014] The printing device 11 includes a transport unit 20. The transport unit 20 is housed in the housing 12. The transport unit 20 is configured to transport a medium 99. The transport unit 20 transports the medium 99 from the payout unit 13 toward the winding unit 15. More specifically, the transport unit 20 transports the medium 99 from the payout unit 13 toward the winding unit 15 via the support unit 17.

[0015] The transport unit 20 has one or more guide rollers. The transport unit 20 has, for example, a first guide roller 21 and a second guide roller 22. The guide rollers are rollers that guide the medium 99. The medium 99 is wound around the guide rollers. The first guide roller 21 comes into contact with the portion of the medium 99 that has not yet been printed. The first guide roller 21 guides the medium 99 from the payout unit 13 toward the support unit 17. The second guide roller 22 comes into contact with the portion of the medium 99 that has been printed. The second guide roller 22 guides the medium 99 from the support unit 17 toward the winding unit 15.

[0016] The transport unit 20 has one or more transport rollers. The transport unit 20 has, for example, a first transport roller 23 and a second transport roller 24. The transport rollers are rollers that transport the medium 99. The transport rollers are rotated by the power of a motor (not shown). The first transport roller 23 comes into contact with the portion of the medium 99 that has not yet been printed. The first transport roller 23 transports the medium 99 from the payout unit 13 toward the support unit 17. The second transport roller 24 comes into contact with the portion of the medium 99 that has been printed. The second transport roller 24 transports the medium 99 from the support unit 17 toward the winding unit 15.

[0017] The transport unit 20 has one or more driven rollers. The transport unit 20 has, for example, a first driven roller 25 and a second driven roller 26. The driven rollers are rollers that face the transport rollers. The first driven roller 25 faces the first transport roller 23. The first driven roller 25 presses the medium 99 against the first transport roller 23. This makes it easier for the first transport roller 23 to transport the medium 99. The second driven roller 26 faces the second transport roller 24. The second driven roller 26 presses the medium 99 against the second transport roller 24. This makes it easier for the second transport roller 24 to transport the medium 99.

[0018] The transport unit 20 has one or more support rollers. The transport unit 20 has, for example, a first support roller 27 and a second support roller 28. The support rollers are rollers that wrap the medium 99 around the support unit 17. The support rollers guide the medium 99 so that the medium 99 is wrapped around the support unit 17. The first support roller 27 contacts the portion of the medium 99 before printing. The first support roller 27 contacts the portion of the medium 99 just before it is wrapped around the support unit 17. The second support roller 28 contacts the portion of the medium 99 after printing. The second support roller 28 contacts the portion of the medium 99 just after it has passed through the support unit 17. In one example, the first support roller 27 and the second support roller 28 are positioned below the rotation shaft 18. As a result, the medium 99 is wrapped around the support unit 17 in a shape that is convex upward when viewed from the axial direction of the rotation shaft 18.

[0019] The printing device 11 includes a printing unit 30. The printing unit 30 is housed in the housing 12. The printing unit 30 is configured to eject liquid onto a medium 99. In this way, the printing unit 30 prints an image on the medium 99. The printing unit 30 faces the support unit 17. The printing unit 30 ejects liquid onto the medium 99 supported by the support unit 17.

[0020] The printing unit 30 has one or more ejection units 31. In one example, the printing unit 30 has six ejection units 31. The ejection units 31 print an image on the medium 99 by ejecting liquid. The ejection units 31 include line heads that can eject liquid simultaneously across the entire width of the medium 99. The six ejection units 31 face the support portion 17. The six ejection units 31 are lined up along the circumferential surface 19. The six ejection units 31 are configured, for example, to eject ink of different colors, respectively. The printing unit 30, for example, ejects ink of different colors onto the medium 99 sequentially.

[0021] The ejection unit 31 is configured to eject ultraviolet curable ink. The ejection unit 31 is not limited to ultraviolet curable ink, and may be configured to eject, for example, water-based ink using water as a solvent. The configuration of the ejection unit 31 will be described in detail later.

[0022] The printing device 11 may include an irradiation unit 32. The irradiation unit 32 is housed in the housing 12. The irradiation unit 32 is configured to irradiate the medium 99 with ultraviolet light. The irradiation unit 32 faces the support unit 17. The irradiation unit 32 irradiates the medium 99 supported by the support unit 17 with ultraviolet light. When the irradiation unit 32 irradiates the medium 99 with ultraviolet light, the ink ejected onto the medium 99 hardens. This causes the ink to fix to the medium 99.

[0023] The irradiation section 32 has one or more irradiation units 33. In one example, the irradiation section 32 has six irradiation units 33. The irradiation units 33 are configured to irradiate ultraviolet light across the entire width of the medium 99. The six irradiation units 33 face the support section 17. The six irradiation units 33 are arranged along the circumferential surface 19. The six irradiation units 33 are arranged, for example, alternately with the six ejection units 31. The irradiation section 32 irradiates the medium 99 with ultraviolet light, for example, each time liquid is ejected onto the medium 99. The six irradiation units 33 may be configured to emit ultraviolet light of different intensities. The printing device 11 may include a heating section that heats the medium 99 instead of the irradiation section 32. For example, if the ejection unit 31 ejects water-based ink, the printing device 11 heats the medium 99 using the heating section. This causes the ink to fix to the medium 99.

[0024] The printing device 11 includes a storage unit 34. The storage unit 34 is configured to store a liquid. The storage unit 34 may be configured to store a plurality of types of liquid. The storage unit 34 is connected to the printing unit 30. The storage unit 34 is connected to a plurality of ejection units 31. The liquid is supplied from the storage unit 34 to the ejection units 31.

[0025] <Discharge unit> Next, a description will be given of the discharge units 31. All six discharge units 31 have the same configuration, so only one discharge unit 31 will be described here.

[0026] 2 and 3, the discharge unit 31 includes a main body module 35. The discharge unit 31 includes one or more head modules 36. In one example, the discharge unit 31 includes six head modules 36. The head modules 36 are configured to be detachable from the main body module 35.

[0027] The main body module 35 has a circuit board 37. The circuit board 37 is a board that controls the head module 36. The circuit board 37 is configured to transmit electrical signals to the head module 36. The circuit board 37 may have a processor including a CPU and a memory. The circuit board 37 may have a hardware circuit such as an ASIC. The circuit board 37 may have a circuit including a combination of a processor and a hardware circuit.

[0028] The main body module 35 has a main holding member 38. The main holding member 38 is configured to hold a circuit board 37. It can also be said that the main holding member 38 is configured to allow the circuit board 37 to be attached. The main holding member 38 is a member that holds not only the circuit board 37 but also various components of the main body module 35.

[0029] The main holding member 38 has a cover frame 39. The cover frame 39 holds the circuit board 37. The cover frame 39 houses the circuit board 37. The cover frame 39 protects the circuit board 37.

[0030] The main holding member 38 has one or more fans 40. In one example, the main holding member 38 has three fans 40. The fans 40 are attached to the cover frame 39. The fans 40 blow air into the cover frame 39. The fans 40 cool the circuit board 37.

[0031] The main holding member 38 has a flow path member 41. The flow path member 41 is a member through which liquid flows. A flow path is formed inside the flow path member 41. The flow path member 41 is, for example, a manifold. The flow path member 41 is supplied with liquid from the storage section 34. The flow path member 41 supplies the liquid to the head module 36. The liquid is supplied from the storage section 34 to the head module 36 through the flow path member 41.

[0032] The flow path member 41 has a supply pipe 42. The supply pipe 42 is a pipe connected to the storage portion 34. The supply pipe 42 is connected to the storage portion 34 by, for example, a tube (not shown). As a result, liquid is supplied from the storage portion 34 to the flow path member 41 through the supply pipe 42.

[0033] The flow path member 41 may have a discharge pipe 43. The discharge pipe 43 is a pipe connected to the storage section 34. The discharge pipe 43 is connected to the storage section 34, for example, by a tube (not shown). This allows the liquid to be returned from the flow path member 41 to the storage section 34 through the discharge pipe 43. In this case, the liquid can circulate in the flow path member 41 and the storage section 34.

[0034] 4 and 5, the flow path member 41 has one or more inlet pipes 44. In one example, the flow path member 41 has eleven inlet pipes 44. The inlet pipes 44 are pipes connected to the head module 36. Liquid is supplied from the flow path member 41 to the head module 36 through the inlet pipes 44. Liquid is supplied from the reservoir 34 to the head module 36 through the supply pipe 42 and the inlet pipe 44.

[0035] The inlet pipe 44 extends toward the head module 36. The inlet pipe 44 extends toward the peripheral surface 19. In one example, the inlet pipe 44 extends in the opposite direction to the supply pipe 42 and the discharge pipe 43.

[0036] The flow path member 41 may have one or more outlet pipes 45. In one example, the flow path member 41 has eleven outlet pipes 45. The outlet pipes 45 are pipes connected to the head module 36. The liquid is returned from the head module 36 to the flow path member 41 through the outlet pipes 45. The liquid is returned from the head module 36 to the reservoir 34 through the outlet pipes 45 and the discharge pipe 43. In this case, the liquid can circulate in the reservoir 34 and the head module 36.

[0037] The outlet pipe 45 extends toward the head module 36. The outlet pipe 45 extends toward the peripheral surface 19. In one example, the outlet pipe 45 extends in the opposite direction to the supply pipe 42 and the discharge pipe 43.

[0038] The main holding member 38 has a head plate 46. The head plate 46 is configured to hold the head module 36. The head module 36 is detachably attached to the head plate 46. The head module 36 is attached to the head plate 46. The head module 36 is fixed to the head plate 46. For example, the head module 36 is fastened to the head plate 46 with screws.

[0039] The head plate 46 is configured to hold the flow path member 41. The flow path member 41 is attached to the head plate 46. The flow path member 41 is fixed to the head plate 46. For example, the flow path member 41 is fastened to the head plate 46 with screws.

[0040] The head plate 46 is configured to be held by the cover frame 39. The head plate 46 is attached to the cover frame 39. The head plate 46 is fixed to the cover frame 39. For example, the head plate 46 is screwed to the cover frame 39. By being attached to the cover frame 39, the head plate 46 fixes the flow path member 41 to the cover frame 39.

[0041] The head plate 46 has an opposing surface 47. The opposing surface 47 is a surface that faces the support portion 17. The opposing surface 47 faces the peripheral surface 19. A plurality of screw holes 48 are opened in the opposing surface 47. The screw holes 48 are holes for attaching the head module 36 to the head plate 46.

[0042] The head plate 46 has two side surfaces 49. The side surfaces 49 are surfaces that connect to the opposing surface 47. The side surfaces 49 are, for example, surfaces that are perpendicular to the opposing surface 47. In FIGS. 4 and 5, one of the two side surfaces 49 is shown. The two side surfaces 49 face opposite each other.

[0043] A plurality of mounting holes 50 and a plurality of holding holes 51 are opened in the side surface 49. The mounting holes 50 are holes for attaching the flow path member 41 to the head plate 46. The holding holes 51 are holes for attaching the head plate 46 to the cover frame 39. In Figures 4 and 5, the mounting holes 50 and holding holes 51 that open in one of the two side surfaces 49 are shown. The mounting holes 50 and holding holes 51 are also opened in the other side surface 49.

[0044] 2 and 3, the main body module 35 has one or more first connection members 52. In one example, the main body module 35 has eleven first connection members 52. The first connection members 52 extend from the circuit board 37. The first connection members 52 may be connected to the circuit board 37. Of the eleven first connection members 52, five first connection members 52 extend from the front surface of the circuit board 37, and the remaining six first connection members 52 extend from the back surface of the circuit board 37. The first connection members 52 are connected to the head module 36. This allows an electrical signal to be transmitted from the circuit board 37 to the head module 36.

[0045] 6, 7, and 8, the first connection member 52 has a first wiring portion 53. The first wiring portion 53 is a portion extending from the circuit board 37. The first wiring portion 53 may be connected to the circuit board 37. The first wiring portion 53 is, for example, a flexible flat cable. The first wiring portion 53 may also be composed of other cables.

[0046] The first connecting member 52 has a first connecting portion 54. The first connecting portion 54 is a portion that is connected to the head module 36. The first connecting portion 54 is attached to the first wiring portion 53. The first connecting portion 54 is located at the tip of the first wiring portion 53.

[0047] The first connection portion 54 has a relay substrate 55. The relay substrate 55 is a substrate connected to the first wiring portion 53. The relay substrate 55 may be a substrate to which the first wiring portion 53 extends. The relay substrate 55 is connected to the circuit board 37 via the first wiring portion 53. The relay substrate 55 relays between a relay connector 56 (described later) and the first wiring portion 53.

[0048] The first connection portion 54 has a relay connector 56. The relay connector 56 is a connector that is connected to the head module 36. The relay connector 56 is, for example, a female connector. The relay connector 56 is attached to the relay board 55. The relay connector 56 faces the peripheral surface 19. The relay connector 56 may be attached directly to the first wiring portion 53.

[0049] As shown in FIG. 9 , the relay connector 56 may have a locking hole 57. The locking hole 57 is a hole for locking the connection with the head module 36. When the relay connector 56 is connected to the head module 36, a part of the head module 36 is inserted into the locking hole 57. In other words, a part of the head module 36 engages with the relay connector 56. This makes it difficult for the head module 36 to come off the relay connector 56.

[0050] 8 , the main body module 35 has a first engagement member 58. The first engagement member 58 is attached to the main holding member 38. The first engagement member 58 is fixed to the main holding member 38. In one example, the first engagement member 58 is attached to the cover frame 39. The first engagement member 58 is fixed to the cover frame 39.

[0051] The first connecting portion 54 is fixed to the first engaging member 58. In one example, a relay board 55 is fixed to the first engaging member 58. A relay connector 56 may be fixed to the first engaging member 58. The first engaging member 58 is attached to the main holding member 38, thereby fixing the first connecting portion 54 to the main holding member 38.

[0052] The first engagement member 58 is configured to engage with the head module 36. When the first engagement member 58 engages with the head module 36, the head module 36 is positioned relative to the main body module 35.

[0053] 10 and 11 , the first engaging member 58 has a fixed portion 59. The fixed portion 59 is a portion to which the first connecting portion 54 is fixed. The fixed portion 59 is also a portion that is fixed to the main holding member 38. The fixed portion 59 fixes the first connecting portion 54 to the main holding member 38. The fixed portion 59 is located on, for example, the relay board 55. In one example, the fixed portion 59 is located on the relay board 55 so as to surround the relay connector 56.

[0054] A fixing hole 60 is opened in the fixing portion 59. The fixing hole 60 is a hole for fixing the first connection portion 54 to the fixing portion 59. In one example, the fixing hole 60 is used to screw the relay board 55 to the fixing portion 59. The fixing hole 60 is also used to fix the fixing portion 59 to the main holding member 38. In one example, the fixing hole 60 is used to screw the fixing portion 59 to the cover frame 39.

[0055] The first engagement member 58 has one or more engagement pins 61. In one example, the first engagement member 58 has two engagement pins 61. The engagement pins 61 extend from the fixed portion 59. The engagement pins 61 extend toward the peripheral surface 19. The engagement pins 61 are inserted into the head module 36 to engage with the head module 36. This positions the head module 36 with respect to the engagement pins 61.

[0056] The first engagement member 58 may have a pressing member 62. The pressing member 62 is a member that presses the head module 36. The pressing member 62 is attached to the fixed portion 59. The pressing member 62 is, for example, a leaf spring. The pressing member 62 extends from the fixed portion 59 toward the circumferential surface 19. The pressing member 62 extends from the fixed portion 59 so as to cover the relay connector 56. The pressing member 62 presses the attached head module 36. The pressing member 62 has a tip portion 63. The tip portion 63 comes into contact with the head module 36. The pressing member 62 presses the head module 36 with the tip portion 63.

[0057] 12, 13, and 14, the head module 36 has one or more heads 65. The head module 36 may have one head 65 or multiple heads 65. In one example, five of the six head modules 36 have two heads 65. The remaining one of the six head modules 36 has one head 65. Therefore, the discharge unit 31 has eleven heads 65. The eleven heads 65 are arranged in a zigzag pattern in the longitudinal direction of the discharge unit 31.

[0058] 12, 13, and 14 is a module that has two heads 65. A head module 36 that has one head 65 has the same configuration as a head module 36 that has two heads 65. Therefore, here, the head module 36 that has two heads 65 will be described.

[0059] The head 65 is configured to eject liquid. The head 65 has a nozzle surface 66. The nozzle surface 66 is a surface where the nozzles open. The nozzle surface 66 faces the peripheral surface 19. The head 65 ejects liquid from the nozzles toward the peripheral surface 19.

[0060] The head 65 has a connecting pipe 67. The connecting pipe 67 is a pipe connected to the flow path member 41. More specifically, the connecting pipe 67 is connected to the introduction pipe 44. This connects the head 65 to the flow path member 41. In one example, the introduction pipe 44 is inserted into the connecting pipe 67, thereby connecting the head 65 to the flow path member 41. Liquid is supplied from the flow path member 41 to the head 65 through the connecting pipe 67. The connecting pipe 67 extends toward the main body module 35.

[0061] The head 65 may have a return pipe 68. The return pipe 68 is a pipe connected to the flow path member 41. More specifically, the return pipe 68 is connected to the outlet pipe 45. This connects the head 65 to the flow path member 41. In one example, the outlet pipe 45 is inserted into the return pipe 68, thereby connecting the head 65 to the flow path member 41. Liquid is returned from the head 65 to the flow path member 41 through the return pipe 68. The return pipe 68 extends toward the main body module 35.

[0062] The head module 36 has a sub-holding member 69. The sub-holding member 69 is held by the main holding member 38. The sub-holding member 69 is configured to be detachable from the main holding member 38. The sub-holding member 69 is attached to the main holding member 38. The sub-holding member 69 is fixed to the main holding member 38. More specifically, the sub-holding member 69 is fixed to the head plate 46. In one example, the sub-holding member 69 is screwed to the head plate 46.

[0063] The sub-holding member 69 is configured to hold the head 65. It can also be said that the sub-holding member 69 is configured to have the head 65 attached to it. The head 65 is attached to the sub-holding member 69. The head 65 is fixed to the sub-holding member 69. In one example, the head 65 is screwed to the sub-holding member 69.

[0064] The sub-holding member 69 holds a plurality of heads 65. In one example, the sub-holding member 69 holds two heads 65 so that one head is sandwiched between the other two heads 65. The sub-holding member 69 is a plate-shaped member. The sub-holding member 69 has a first surface 70 and a second surface 71. The first surface 70 and the second surface 71 are, for example, surfaces parallel to the side surface 49. The second surface 71 is a surface facing away from the first surface 70. One of the two heads 65 faces the first surface 70, and the other faces the second surface 71. In the sub-holding member 69, the two heads 65 are attached to the first surface 70 and the second surface 71, respectively. For a head module 36 having one head 65, the head 65 is attached to either the first surface 70 or the second surface 71. For a head module 36 having one head 65, the head 65 is attached to either the first surface 70 or the second surface 71. In one example, for a head module 36 having one head 65, the head 65 is attached to the second surface 71.

[0065] The head module 36 has one or more mounting members 72. In one example, the head module 36 has two mounting members 72. The mounting members 72 are members that mount the head module 36 to the main body module 35. The mounting members 72 are, for example, bolts. The mounting members 72 are inserted into the sub-holding member 69. The mounting members 72 are inserted into the sub-holding member 69 so as to protrude toward the main body module 35. The mounting members 72 are positioned so as to extend between the two heads 65 when the nozzle surface 66 is viewed from the front.

[0066] When the head module 36 is attached to the main body module 35, the attachment members 72 are inserted into the screw holes 48. By inserting the attachment members 72 into the screw holes 48, the sub-holding member 69 is attached to the main holding member 38. More specifically, the sub-holding member 69 is fixed to the head plate 46. The user attaches and detaches the sub-holding member 69 to and from the head plate 46 by alternately turning the two attachment members 72 little by little.

[0067] The head module 36 has one or more fasteners 73. The head module 36 has the same number of fasteners 73 as the mounting members 72. The fasteners 73 are attached to the mounting members 72. The fasteners 73 are members that fasten the mounting members 72 to the sub-holding member 69. The fasteners 73 are, for example, C-rings. The fasteners 73 hold the mounting members 72 in a rotatable state on the sub-holding member 69. The fasteners 73 reduce the risk of the mounting members 72 falling off the sub-holding member 69.

[0068] The head module 36 has one or more second connection members 74. The head module 36 has the same number of second connection members 74 as the number of heads 65. In one example, the head module 36 has two second connection members 74. A head module 36 having one head 65 has one second connection member 74.

[0069] The second connection member 74 extends from the head 65. The second connection member 74 extends from the head 65 toward the main body module 35. The second connection member 74 is connected to the main body module 35. More specifically, the second connection member 74 is connected to the first connection member 52. This allows an electrical signal to be transmitted from the circuit board 37 to the head 65.

[0070] The second connection member 74 has a second wiring portion 75. The second wiring portion 75 extends from the head 65. The second wiring portion 75 is, for example, a flexible flat cable. The second wiring portion 75 may also be composed of other types of cables.

[0071] The second connection member 74 has a second connection portion 76. The second connection portion 76 is a portion that is connected to the main body module 35. More specifically, the second connection portion 76 is connected to the first connection portion 54. More specifically, the second connection portion 76 is connected to the relay connector 56. The second connection portion 76 is attached to the second wiring portion 75. The second connection portion 76 is located at the tip of the second wiring portion 75.

[0072] The second connection portion 76 has a connection connector 77. The connection connector 77 is a connector that is connected to the main body module 35. The connection connector 77 is, for example, a male connector. The connection connector 77 is connected to the relay connector 56. In one example, the connection connector 77 is inserted into the relay connector 56. This causes the head module 36 to be energized.

[0073] The second connecting portion 76 may have a locking plate 78. The locking plate 78 is configured to lock the connection between the intermediate connector 56 and the connecting connector 77. The locking plate 78 extends from the connecting connector 77. The locking plate 78 extends toward the peripheral surface 19. The locking plate 78 is inserted into the intermediate connector 56 together with the connecting connector 77, for example.

[0074] The lock plate 78 has a protrusion 79. The protrusion 79 engages with the lock hole 57 when the connection connector 77 is connected to the relay connector 56. This locks the connection between the connection connector 77 and the relay connector 56. The protrusion 79 is caught in the lock hole 57, making it difficult for the connection connector 77 to come off the relay connector 56.

[0075] The lock plate 78 may have a contact portion 80. The contact portion 80 is a portion that comes into contact with the pressing member 62. The contact portion 80 is located at the tip of the lock plate 78. The contact portion 80 comes into contact with the tip portion 63. The contact portion 80 is pressed against the tip portion 63. When the contact portion 80 is pressed against the tip portion 63, the lock plate 78 bends so that the protrusion 79 comes out of the lock hole 57. In other words, the pressing member 62 prevents the lock plate 78 from locking.

[0076] 10 and 15, when the relay connector 56 and the connection connector 77 are connected, the contact portion 80 is positioned so as to be pressed against the tip portion 63. In this way, when the pressing member 62 is provided, it is easy to remove the head module 36. When the pressing member 62 is not provided, it is possible to prevent the head module 36 from falling off.

[0077] 12, 13, and 14, the head module 36 has one or more second engagement members 81. The head module 36 has the same number of second engagement members 81 as the number of heads 65. In one example, the head module 36 has two second engagement members 81. A head module 36 having one head 65 has one second engagement member 81.

[0078] The second engagement member 81 is attached to the sub-holding member 69. The second engagement member 81 is fixed to the sub-holding member 69. Of the two second engagement members 81, one is attached to the first surface 70 and the other is attached to the second surface 71. The second engagement member 81 is positioned so as to be sandwiched between the head 65 and the sub-holding member 69. For a head module 36 having one head 65, the second engagement member 81 is attached to either the first surface 70 or the second surface 71. In one example, for a head module 36 having one head 65, the second engagement member 81 is attached to the second surface 71.

[0079] The second connecting portion 76 is fixed to the second engaging member 81. In one example, the second engaging member 81 has a connecting connector 77 fixed thereto. The second engagement member 81 is configured to engage with the main body module 35. More specifically, the second engagement member 81 is configured to engage with the first engagement member 58. In one example, the engagement pin 61 is inserted into the second engagement member 81, causing the second engagement member 81 to engage with the first engagement member 58. The engagement of the second engagement member 81 with the first engagement member 58 positions the head module 36 relative to the main body module 35. In other words, the engagement of the second engagement member 81 with the first engagement member 58 positions the sub-holding member 69 relative to the main holding member 38.

[0080] When the second engaging member 81 engages with the first engaging member 58, the sub-holding member 69 is guided to be attached to the main holding member 38. When the second engaging member 81 engages with the first engaging member 58, the sub-holding member 69 is guided to connect the second connecting member 74 to the first connecting member 52. When the second engaging member 81 engages with the first engaging member 58, the sub-holding member 69 is guided to connect the head 65 to the flow path member 41. More specifically, when the second engaging member 81 engages with the first engaging member 58, the sub-holding member 69 is guided to connect the connecting pipe 67 to the inlet pipe 44. When the second engaging member 81 engages with the first engaging member 58, the sub-holding member 69 is guided to connect the return pipe 68 to the outlet pipe 45.

[0081] The sub-holding member 69 is attached to the main holding member 38 by the second engaging member 81 engaging with the first engaging member 58. More specifically, the sub-holding member 69 is attached to the head plate 46 by the second engaging member 81 engaging with the first engaging member 58. In one example, the attachment member 72 is inserted into the screw hole 48 by the second engaging member 81 engaging with the first engaging member 58. In this way, the second engaging member 81 and the first engaging member 58 make it easy to attach and detach the sub-holding member 69 to and from the main holding member 38.

[0082] The second engaging member 81 engages with the first engaging member 58, thereby connecting the second connecting member 74 to the first connecting member 52. In one example, the second engaging member 81 engages with the first engaging member 58, thereby inserting the connection connector 77 into the relay connector 56. In this way, the second engaging member 81 and the first engaging member 58 attach and detach the sub-holding member 69 to and from the main holding member 38, and the second connecting member 74 is attached and detached to and from the first connecting member 52.

[0083] The head 65 is connected to the flow path member 41 by engaging the second engaging member 81 with the first engaging member 58. More specifically, the connection pipe 67 is connected to the inlet pipe 44 by engaging the second engaging member 81 with the first engaging member 58. The return pipe 68 is connected to the outlet pipe 45 by engaging the second engaging member 81 with the first engaging member 58. In this way, the head 65 is attached to and detached from the flow path member 41 as the sub-holding member 69 is attached to and detached from the main holding member 38.

[0084] The second engagement member 81 has an attachment portion 82. The attachment portion 82 is attached to the sub-holding member 69. The attachment portion 82 is, for example, screwed to the sub-holding member 69. The attachment portion 82 is sandwiched between the head 65 and the sub-holding member 69.

[0085] The second engagement member 81 has a guide portion 83. The guide portion 83 is a portion that guides the second wiring portion 75. The guide portion 83 extends from the attachment portion 82 toward the main body module 35.

[0086] The second engagement member 81 has a support portion 84. The support portion 84 is a portion that supports the second connection portion 76. More specifically, the support portion 84 supports the connector 77. The second connection portion 76 is fixed to the support portion 84. The support portion 84 extends from the guide portion 83.

[0087] The support portion 84 has a first support plate 85, a second support plate 86, and a third support plate 87. In one example, the support portion 84 has one first support plate 85, two second support plates 86, and two third support plates 87.

[0088] The first support plate 85 is a plate that extends from the guide portion 83 toward the main body module 35. The first support plate 85 extends, for example, perpendicular to the nozzle surface 66. The second support plate 86 extends in a curved manner from the guide portion 83. The second support plate 86 extends, for example, parallel to the nozzle surface 66. The two second support plates 86 are positioned at an interval in the longitudinal direction of the ejection unit 31. The third support plate 87 extends from the second support plate 86 toward the main body module 35. The two third support plates 87 extend from the two second support plates 86, respectively. The third support plate 87 extends, for example, perpendicular to the nozzle surface 66.

[0089] The first support plate 85 and the third support plate 87 are positioned to sandwich the second connection portion 76. More specifically, the first support plate 85 and the third support plate 87 are positioned to sandwich the connection connector 77. The first support plate 85, the second support plate 86, and the third support plate 87 are positioned to surround the second connection portion 76. In this way, the first support plate 85, the second support plate 86, and the third support plate 87 support the second connection portion 76.

[0090] The support portion 84 has a protruding piece 88. The protruding piece 88 engages with the second connection portion 76. More specifically, the protruding piece 88 engages with the connection connector 77. This fixes the second connection portion 76 to the support portion 84. The protruding piece 88 protrudes from the first support plate 85, for example.

[0091] The second engagement member 81 has one or more insertion portions 89. In one example, the second engagement member 81 has two insertion portions 89. The insertion portions 89 are portions into which the engagement pins 61 are inserted. The insertion portions 89 extend from the support portion 84. The two insertion portions 89 extend from the two second support plates 86, respectively. The second engagement member 81 and the first engagement member 58 are engaged with each other by inserting the engagement pins 61 into the insertion portions 89.

[0092] The insertion portion 89 has a first insertion plate 90, a second insertion plate 91, and a third insertion plate 92. The first insertion plate 90 extends from the support portion 84. The first insertion plate 90 extends, for example, parallel to the nozzle face 66. The second insertion plate 91 extends in a curved manner from the first insertion plate 90. The second insertion plate 91 extends, for example, perpendicular to the nozzle face 66. The third insertion plate 92 extends in a curved manner from the second insertion plate 91. The third insertion plate 92 extends, for example, parallel to the nozzle face 66. When the nozzle face 66 is viewed from the front, the first insertion plate 90 and the third insertion plate 92 are positioned to overlap.

[0093] One or more insertion openings 93 are opened in the insertion portion 89. The insertion openings 93 are openings into which the engagement pins 61 are inserted. The insertion openings 93 are opened in the insertion plates. In one example, the insertion openings 93 are opened in each of the first insertion plate 90 and the third insertion plate 92. The sub-holding member 69 is guided by inserting the engagement pins 61 into the insertion openings 93.

[0094] 16, 17, and 18, when attaching the head module 36 to the main body module 35, the user first engages the second engagement member 81 with the first engagement member 58. That is, the user inserts the engagement pin 61 into the insertion portion 89. The user then moves the head module 36 closer to the main body module 35 along the engagement pin 61.

[0095] When the head module 36 approaches the main body module 35, the attachment members 72 are inserted into the screw holes 48. The user alternately rotates the two attachment members 72 little by little. This brings the head module 36 even closer to the main body module 35. By rotating the attachment members 72, the head module 36 is fixed to the main body module 35.

[0096] During the process until the head module 36 is fixed to the main body module 35, the second connection member 74 is connected to the first connection member 52. That is, as the head module 36 approaches the main body module 35, the connection connector 77 is inserted into the relay connector 56. This connects the head 65 to the circuit board 37. Therefore, the head module 36 is connected to the circuit board 37 in parallel with the head module 36 being attached to the head plate 46.

[0097] During the process until the head module 36 is fixed to the main body module 35, the connecting pipe 67 is connected to the inlet pipe 44. That is, as the head module 36 approaches the main body module 35, the inlet pipe 44 is inserted into the connecting pipe 67. This allows liquid to be supplied from the flow path member 41 to the head 65. Furthermore, during the process until the head module 36 is fixed to the main body module 35, the return pipe 68 is connected to the outlet pipe 45. That is, as the head module 36 approaches the main body module 35, the outlet pipe 45 is inserted into the return pipe 68. This allows liquid to be supplied from the head 65 to the flow path member 41. Therefore, the head module 36 is connected to the flow path member 41 in parallel with the attachment of the head module 36 to the head plate 46.

[0098] When removing the head module 36 from the main body module 35, the user removes the head module 36 by reversing the above procedure. For example, when removing the head module 36 from the main body module 35, the user rotates the mounting member 72 to separate the head module 36 from the main body module 35. As a result, the second connecting member 74 is detached from the first connecting member 52. Also, the head 65 is detached from the flow path member 41. In this way, the head module 36 can be easily replaced. This allows the user to easily replace the head 65.

[0099] As shown in FIGS. 19 and 20 , the ejection unit 31 may have a head cover 95. The head cover 95 is a cover that covers the head module 36. The head cover 95 covers the head module 36 so that the nozzle surface 66 is exposed. The head cover 95 is attached to the head plate 46. The head cover 95 protects the head module 36. The head cover 95 is attached to the head plate 46 when all of the head modules 36 are attached to the main body module 35.

[0100] <Actions and Effects of the Example> Next, the operation and effects of the above embodiment will be described. (1) The sub-holding member 69 is attached to the main holding member 38 by engaging the second engaging member 81 with the first engaging member 58. The second connecting portion 76 is connected to the first connecting portion 54 by engaging the second engaging member 81 with the first engaging member 58. According to the above configuration, as the sub-holding member 69 is attached to or detached from the main holding member 38, the second connecting portion 76 is attached to or detached from the first connecting portion 54. This makes it possible to easily replace the head 65. For example, the user replaces the head 65 together with the sub-holding member 69.

[0101] (2) The first engaging member 58 engages with the second engaging member 81 by inserting the engaging pin 61 into the second engaging member 81. According to the above configuration, the first engaging member 58 and the second engaging member 81 can be easily engaged with each other. Therefore, the first connecting portion 54 and the second connecting portion 76 can be easily connected to each other.

[0102] (3) The second engaging member 81 has a support portion 84 that supports the connection connector 77 and an insertion portion 89 into which the engaging pin 61 is inserted. With the above configuration, the first engaging member 58 and the second engaging member 81 can be easily engaged with each other. Therefore, the first connecting portion 54 and the second connecting portion 76 can be easily connected to each other.

[0103] (4) The sub-holding member 69 is configured to hold the plurality of heads 65. According to the above configuration, by removing the sub-holding member 69 from the main holding member 38, the plurality of heads 65 can be replaced.

[0104] (5) The plurality of heads 65 includes a head 65 attached to the first surface 70 and a head 65 attached to the second surface 71. According to the above configuration, the sub-holding member 69 can easily hold the plurality of heads 65.

[0105] (6) The sub-holding member 69 is attached to the head plate 46, thereby connecting the head 65 to the flow path member 41. According to the above configuration, the head 65 is attached to and detached from the flow path member 41 as the sub-holding member 69 is attached to and detached from the main holding member 38. Therefore, the head 65 can be easily replaced.

[0106] (7) The second engaging member 81 engages with the first engaging member 58, thereby connecting the connecting pipe 67 to the flow path member 41. According to the above configuration, as the sub-holding member 69 is attached to and detached from the main holding member 38, the head 65 can be easily attached to and detached from the flow path member 41.

[0107] <Example of change> The above embodiment can be modified as follows: The above embodiment and the following modifications can be combined with each other within the scope of technical compatibility.

[0108] The printing device 11 is not limited to printing on a long medium 99, and may be configured to print on, for example, a single sheet of medium 99. The liquid ejected by the head 65 is not limited to ink, but may be a liquid in which particles of a functional material are dispersed or mixed in a liquid. For example, the head 65 may eject a liquid containing, in a dispersed or dissolved form, an electrode material or a pixel material used in the manufacture of liquid crystal displays, electroluminescent displays, and surface-emitting displays.

[0109] <Technical philosophy> The technical concepts and effects that can be understood from the above-described embodiment and modified examples will be described below.

[0110] (A) A printing device includes a discharge unit that prints an image on a medium by discharging a liquid, the discharge unit having a main body module and a head module configured to be detachable from the main body module, the main body module having a main holding member, a circuit board attached to the main holding member, a first connecting member extending from the circuit board, and a first engaging member attached to the main holding member, the head module having a sub-holding member configured to be detachable from the main holding member, a head attached to the sub-holding member, a second connecting member extending from the head, and and a second engaging member attached to a sub-holding member, wherein the first connecting member has a first wiring portion extending from the circuit board and a first connecting portion attached to the first wiring portion and fixed to the first engaging member, and the second connecting member has a second wiring portion extending from the head and a second connecting portion attached to the second wiring portion and fixed to the second engaging member, wherein the sub-holding member is attached to the main holding member by engaging the second engaging member with the first engaging member, and the second connecting portion is connected to the first connecting portion by engaging the second engaging member with the first engaging member. According to the above configuration, as the sub-holding member is attached to or detached from the main holding member, the second connecting portion is attached to or detached from the first connecting portion. This allows for easy head replacement.

[0111] (B) In the above printing device, the first connection portion may have a relay board connected to the first wiring portion and a relay connector attached to the relay board, and the first engagement member may have a fixing portion that fixes the relay board to the main holding member and an engagement pin extending from the fixing portion, and the engagement pin may be inserted into the second engagement member to engage with the second engagement member. According to the above configuration, the first engagement member and the second engagement member are more likely to engage with each other. Therefore, the first connection portion and the second connection portion are more likely to be connected to each other.

[0112] (C) In the above printing device, the second connection portion may have a connection connector that is connected to the relay connector, and the second engagement member may have a support portion that supports the connection connector and an insertion portion into which the engagement pin is inserted. With the above configuration, the first engagement member and the second engagement member are more likely to engage with each other. Therefore, the first connection portion and the second connection portion are more likely to be connected to each other.

[0113] (D) In ​​the printing device, the head may be one of a plurality of heads, and the sub-holding member may be configured to hold the plurality of heads. According to the above configuration, the plurality of heads can be replaced by removing the sub-holding member from the main holding member.

[0114] (E) In the printing device, the sub-holding member may have a first surface and a second surface facing away from the first surface, and the plurality of heads may include a head attached to the first surface and a head attached to the second surface. With the above configuration, the sub-holding member can easily hold the plurality of heads.

[0115] (F) In the above printing device, the main holding member may have a flow path member through which liquid flows and a head plate to which the sub-holding member is detachably attached, and the head may be connected to the flow path member by attaching the sub-holding member to the head plate. According to the above configuration, the head is attached to and detached from the flow path member as the sub-holding member is attached to and detached from the main holding member. Therefore, the head can be easily replaced.

[0116] (G) In the printing device, the head may have a connecting pipe connected to the flow path member, and the second engaging member may engage with the first engaging member to connect the connecting pipe to the flow path member. According to the above configuration, as the sub-holding member is attached to and detached from the main holding member, the head may be easily attached to and detached from the flow path member. [Explanation of symbols]

[0117] 11...printing device, 12...casing, 13...feeding section, 14...feeding shaft, 15...winding section, 16...winding shaft, 17...support section, 18...rotating shaft, 19...periphery, 20...conveying section, 21...first guide roller, 22...second guide roller, 23...first conveying roller, 24...second conveying roller, 25...first driven roller, 26...second driven roller, 27...first support roller, 28...second support roller, 30...printing section, 31 ...Discharge unit, 32...Irradiation section, 33...Irradiation unit, 34...Storage section, 35...Main module, 36...Head module, 37...Circuit board, 38...Main holding member, 39...Cover frame, 40...Fan, 41...Flow path member, 42...Supply pipe, 43...Exhaust pipe, 44...Inlet pipe, 45...Outlet pipe, 46...Head plate, 47...Opposite surface, 48...Screw hole, 49...Side, 50...Mounting hole, 51...Holding hole, 52...First connection section member, 53...first wiring portion, 54...first connection portion, 55...relay board, 56...relay connector, 57...lock hole, 58...first engaging member, 59...fixing portion, 60...fixing hole, 61...engaging pin, 62...pressing member, 63...tip portion, 65...head, 66...nozzle surface, 67...connecting pipe, 68...reflux pipe, 69...sub-holding member, 70...first surface, 71...second surface, 72...mounting member, 73...tool, 74...second connecting member, 75...second wiring part, 76...second connection part, 77...connection connector, 78...lock plate, 79...protrusion, 80...contact part, 81...second engagement member, 82...mounting part, 83...guide part, 84...support part, 85...first support plate, 86...second support plate, 87...third support plate, 88...protruding piece, 89...insertion part, 90...first insertion plate, 91...second insertion plate, 92...third insertion plate, 93...insertion port, 95...head cover, 99...medium, R1...roll body.

Claims

1. a discharge unit that prints an image on a medium by discharging a liquid; The discharge unit is A main body module; a head module configured to be detachable from the main body module, The main body module includes: A main holding member; a circuit board attached to the main holding member; a first connection member extending from the circuit board; a first engagement member attached to the main holding member, The head module includes: a sub-holding member configured to be detachable from the main holding member; a head attached to the sub-holding member; a second connecting member extending from the head; a second engaging member attached to the sub-holding member, The first connecting member is a first wiring portion extending from the circuit board; a first connection portion attached to the first wiring portion and fixed to the first engagement member; The second connecting member is a second wiring portion extending from the head; a second connection portion attached to the second wiring portion and fixed to the second engagement member; The second engaging member engages with the first engaging member, thereby attaching the sub-holding member to the main holding member, A printing device, characterized in that the second connecting portion is connected to the first connecting portion by the second engaging member engaging with the first engaging member.

2. The first connection portion is an intermediate substrate connected to the first wiring portion; a relay connector attached to the relay board, The first engagement member is a fixing portion that fixes the relay board to the main holding member; an engagement pin extending from the fixed portion; 2. The printing device according to claim 1, wherein the engagement pin is inserted into the second engagement member, thereby engaging with the second engagement member.

3. the second connection portion has a connection connector to be connected to the relay connector, The second engagement member is a support portion that supports the connector; 3. The printing device according to claim 2, further comprising an insertion portion into which the engagement pin is inserted.

4. the head is one of a plurality of heads, The printing apparatus according to claim 1 , wherein the sub-holding member is configured to hold a plurality of the heads.

5. The sub-holding member has a first surface and a second surface facing away from the first surface, 5. The printing device according to claim 4, wherein the plurality of heads includes a head attached to the first surface and a head attached to the second surface.

6. The main holding member is a flow path member through which a liquid flows; a head plate to which the sub-holding member is detachably configured, 6. The printing device according to claim 1, wherein the sub-holding member is attached to the head plate, thereby connecting the head to the flow path member.

7. the head has a connecting pipe connected to the flow path member, 7. The printing apparatus according to claim 6, wherein the second engaging member engages with the first engaging member, thereby connecting the connecting tube to the flow path member.

Images