Printing device

Abstract

A printing apparatus includes a container for a liquid configured to accommodate the liquid to be supplied to a print head, the container including a filling port configured to enable a user to fill the liquid, the print head being configured to eject the liquid; a supply passage for supplying the liquid from the container to the print head; and an opening and closing valve mechanism arranged at the supply passage and configured to switch between an open state in which communication of the supply passage is established and a closed state in which communication of the supply passage is not established. The opening and closing valve mechanism is configured to be switched by either of an automatic operation and a manual operation.

Description

Technical Field

[0001] This invention relates to printing equipment. Background Technology

[0002] A printing device is known to be constructed using a tube that connects a printhead for ejecting ink to an ink reservoir containing ink to be supplied to the printhead.

[0003] Japanese Patent Application Publication No. H11-70668 (hereinafter referred to as Reference 1) discloses a printing apparatus including an automatic valve that can close a tube located between the printhead and the ink reservoir by using a drive mechanism for paper delivery.

[0004] According to the technology disclosed in Reference 1, the valve cannot be closed if the user moves the printing device while it is powered off. As a result, ink may leak from the printing device in the case of mobile movement. Summary of the Invention

[0005] A printing apparatus according to an aspect of the invention comprises: a container for a liquid configured to contain a liquid to be supplied to a printhead, the container including an inlet configured for a user to inject the liquid, the printhead being configured to eject the liquid; a supply passage for supplying liquid from the container to the printhead; and an on / off valve mechanism disposed at the supply passage and configured to switch between an open state establishing communication of the supply passage and a closed state not establishing communication of the supply passage, wherein the on / off valve mechanism is configured to switch by either automatic or manual operation.

[0006] Other features of the invention will become apparent from the description of the following exemplary embodiments with reference to the accompanying drawings. Attached Figure Description

[0007] Figure 1 It is a three-dimensional view showing the printing equipment;

[0008] Figure 2 This is a schematic diagram showing the positional relationship between the ink can and the printhead;

[0009] Figures 3A to 3D It is a 3D diagram of the printing equipment;

[0010] Figure 4A and Figure 4B This is a schematic diagram showing the status of the ink canister and printhead;

[0011] Figure 5 This is a flowchart of the ink filling sequence;

[0012] Figure 6 It is a block diagram that includes the structure of the printing equipment;

[0013] Figure 7A and Figure 7B It is a three-dimensional view of the operating unit in the valve opening and closing mechanism;

[0014] Figure 8 It is a three-dimensional view showing the outline of the opening and closing valve mechanism;

[0015] Figure 9A and Figure 9B It is a cross-sectional view showing the outline of the opening and closing valve mechanism;

[0016] Figures 10A to 10C This is a perspective view of the opening and closing valve mechanism with the cover component removed.

[0017] Figure 11 It is a 3D diagram of the opening and closing valve mechanism;

[0018] Figures 12A to 12C It is a cross-sectional view of the joint between the operating unit and the drive transmission gear;

[0019] Figure 13A and Figure 13B It is a diagram used to explain the engagement relationship between the operating unit and the drive transmission gear;

[0020] Figure 14 This is a flowchart illustrating an example of the process for a supply pipe closure operation;

[0021] Figure 15 This is a flowchart illustrating an example of processing in the delivery setting mode; and

[0022] Figures 16A to 16C It is a cross-sectional view of the operating unit and drive transmission gear of the valve opening and closing mechanism. Detailed Implementation

[0023] Embodiments of the present invention will now be described with reference to the accompanying drawings. It should be noted that the following embodiments are not intended to limit the scope of the invention, and not all combinations of features described in the embodiments are always necessary. In the following description, the same reference numerals will be used to denote the same configurations in the embodiments.

[0024] In this specification, the term "printing" (also referred to as "print") is not limited to the formation of meaningful information such as text and graphics, but encompasses the formation of all meaningful and meaningless information. It is also assumed that the term broadly includes the formation of images, diagrams, patterns, etc., on a printing medium, as well as the processing of the printing medium, regardless of whether these objects are displayed in a manner perceptible to the human eye.

[0025] At the same time, the term "ink" (which can also be called "liquid") should be interpreted as broadly as the definition of "printing" above. Therefore, it is assumed that the term refers to a liquid used to form images, patterns, designs, etc., used to process printing media, and used to modify ink properties (such as the coagulation and insolubility of colorants contained in the ink to be applied to the printing media) when the liquid is applied to the printing media.

[0026] In addition, the term "printing media" includes not only paper used in conventional printing equipment, but also a wide range of media that can accept ink, such as cloth, plastic film, metal plates, glass, ceramics, wood, and leather.

[0027] <<First Implementation Method>>

[0028] <Structure of Printing Equipment>

[0029] Figure 1 This is a perspective view of a printing device 100, which is an example of a liquid ejection device in this embodiment. Figure 1 Partial configuration of a printing apparatus 100 is shown. The printing apparatus 100 includes: an ink tank 11 containing ink; a printhead 62 ejecting ink supplied from the ink tank 11 via an ink supply passage 51; and a carriage 61 holding the printhead 62. The carriage 61 is configured to scan the printing medium (not shown) in a direction orthogonal to the transport direction of the printing medium, printing an image on the printing medium via a combination of scanning through the carriage 61 and ejection from the printhead 62.

[0030] Although this embodiment describes an example of a printing apparatus, the same applies to liquid ejection apparatuses. For example, such a liquid ejection apparatus may include: a liquid container holding liquid; a liquid ejection unit ejecting liquid supplied from the liquid container via an ink supply passage; and a liquid ejection unit holder holding the liquid ejection unit. This embodiment will be described using a printing apparatus 100 as an example of a liquid ejection apparatus.

[0031] Each ink tank 11 can be either a first ink tank 111 or a second ink tank 112. This embodiment illustrates the case where multiple first ink tanks 111 are provided assuming the use of multiple types of ink. However, when using a single type of ink, only a single ink tank (such as a first ink tank 111) may be provided. Simultaneously, when using a large amount of ink, a second ink tank 112 with a capacity greater than that of the first ink tank 111 may be provided. It is not limited to this; only the second ink tank 112 may be provided, or both the first ink tank 111 and the second ink tank 112 may be provided as in this embodiment. When two or more ink tanks 11 are provided, the ink tanks 11 can be positioned on the right and left sides relative to the center of the printing device 100, or only on one side, depending on the size of the printing device 100. In this embodiment, three color ink tanks 111, each capable of holding cyan, magenta, and yellow ink, are provided as first ink tanks 111. Simultaneously, one black ink tank 112, capable of holding black ink, is provided as the second ink tank 112. This will be described later. Figure 1 The construction of the other components shown.

[0032] The printing apparatus 100 includes a feed roller (not shown) for feeding printing media, a transport roller (not shown) for conveying printing media, and an discharge roller (not shown) for discharging printing media. A printhead 62 is detachably mounted to a carriage 61 and is configured to eject ink onto the surface of the printing media conveyed by the transport roller, thereby printing an image onto the printing media. Additionally, the printing apparatus 100 includes an ink suction mechanism 64 with a suction cap 65 (see [link to ink suction mechanism]). Figure 4B To restore the ejection performance of printhead 62, printing apparatus 100 brings suction cap 65 into contact with printhead 62 and uses ink suction mechanism 64 to draw ink from ink ejection outlet 63 of printhead 62 (see ink ejection outlet 63). Figure 4B The ink suction mechanism 64 includes, for example, a tube connected to the suction cap 65 and a suction pump that serves as the suction unit.

[0033] This embodiment describes an example of printhead 62 ejecting ink according to movement associated with scanning via a carriage. However, the invention is not limited to this configuration. The printhead can be so-called linear, with ink jet exits provided in an area corresponding to the width of the printing medium, and configured to print images onto the printing medium without scanning via a carriage.

[0034] Figure 2This is a schematic diagram showing the positional relationship between the ink tank 11 and the printhead 62. A supply pipe 17, constituting an ink supply passage 51 for supplying ink to the printhead 62, is attached to the ink tank 11. Additionally, a pipe constituting an atmospheric communication passage 54 for communicating the interior of the ink tank 11 (buffer chamber 16) with the atmosphere is connected to the ink tank 11. The supply pipe 17 is formed of a flexible material such as an elastomer. Valve units 53 for blocking the communication of liquid or air are respectively provided at a portion of the ink supply passage 51 between the ink tank 11 and the printhead 62, and at a portion of the atmospheric communication passage 54 between the ink tank 11 and the atmospheric communication port 52.

[0035] Valve unit 53 includes a black-side valve unit and a color-side valve unit. The black-side valve unit closes the ink supply passage 51 connected to the black ink tank 112 and the atmospheric communication passage 54, respectively. The color-side valve unit closes the ink supply passage 51 connected to the color ink tank 111 and the atmospheric communication passage 54, respectively. Simultaneously, an on / off valve mechanism 160 for cutting off liquid or air communication is provided at a portion of each ink supply passage 51 located between valve unit 53 and printhead 62. The on / off valve mechanism 160 includes a black-side on / off valve mechanism and a color-side on / off valve mechanism. The black-side on / off valve mechanism closes the ink supply passage 51 connected to the black ink tank 112. The color-side on / off valve mechanisms close the ink supply passage 51 connected to the color ink tank 111, respectively. Each on / off valve mechanism 160 includes various components. Here, the black-side and color-side on / off valve mechanisms may use common, identical components or different components from each other. Details of the on / off valve mechanisms will be described later. The difference in function between the opening and closing valve mechanism 160 and the valve unit 53 will be described later.

[0036] In the printing apparatus 100 of this embodiment, the liquid-gas replacement section 15 of the ink tank 11 is located at a position H lower in the height direction than the ink jet outlet 63 of the printhead 62 to prevent ink leakage from the ink jet outlet 63 of the printhead 62. In other words, a negative pressure originating from the head difference corresponding to the height H is applied to the ink jet outlet 63. Meanwhile, a buffer chamber 16 is provided at the lower part of the ink tank 11. The buffer chamber 16 can store ink to be ejected when the meniscus in the liquid-gas replacement section 15 is disrupted due to the expansion of air inside the ink tank 11 caused by changes in atmospheric pressure or temperature. Therefore, ink leakage from the ink tank 11 through the atmospheric communication passage 54 can be suppressed. Figure 2 And as described later Figure 4A and Figure 4B In the diagram, dashed lines represent the open state of valve unit 53 and valve opening / closing mechanism 160, while solid lines represent their closed state.

[0037] Next, we will refer to Figures 3A to 5The construction of the ink supply system in this embodiment and the flow from the point of ink injection to the point where the image can be printed are described. Figures 3A to 3D This is a perspective view of the printing device 100 according to this embodiment. Figures 3A to 3D It shows from Figure 3A The state in Figure 3D The user can see a 3D diagram of the process of changing the state of the ink canister 11 as ink is injected into it. Figure 4A and Figure 4B This is a schematic diagram showing the state of the ink tank 11 and the printhead 62 according to this embodiment.

[0038] like Figure 3A As shown, the printing device 100 includes a third cover member 41, which is provided with a mechanism for reading an image on the loaded original and is pivotally supported by the printing device 100 in an openable and closable manner. Note that the third cover member 41 may be a reading mechanism for reading an image on the original, or it may be an access cover forming an outer surface that exposes the internal components of the printing device 100 for removing printing media that may cause poor delivery during image printing. Ink cartridges 11 are mounted on the front surface side (+y direction side) of the printing device 100, allowing the user to easily inject ink into the ink cartridges 11. As described above, a total of four ink cartridges 11 are provided in this embodiment, namely three color ink cartridges 111 and one black ink cartridge 112. However, the type and number of ink cartridges 11 are not limited to this example. For example, more than four ink cartridges 11 may be provided to improve the image printing quality of the printing media.

[0039] When the user fills the ink tank 11, the user first rotates the third cover component 41 upwards, and as follows: Figure 3B As shown, the third cover member 41 is set to the open state. When the third cover member 41 is rotated a predetermined amount, the open state of the third cover member 41 can be maintained by using a locking mechanism (not shown). Here, the cover sensor 18 is mounted on the housing 19 and can detect the open or closed state of the third cover member 41. The cover sensor 18 is not limited to a mechanical sensor designed to detect mechanical contact. For example, the cover sensor 18 can be an optical sensor. Here, the locking mechanism can be released by further rotating the third cover member 41 upward. This action can close the third cover member 41. By opening the third cover member 41, the internal components of the printing device 100 are exposed, and the user can operate the second cover member 21 (see...). Figure 3B and Figure 1 ).

[0040] The second cover member 21 is pivotally supported in a manner that allows it to move between a forward-tilted position (closed cover position) and an upward-raised position (open cover position). Each ink cartridge 11 is provided with a second cover member 21. More specifically, the black ink cartridge 112 is covered by a black second cover member 212, and the three color ink cartridges 111 are integrally covered by a single color second cover member 211. The black second cover member 212 and the color second cover member 211 are collectively referred to as second cover members 21. Although in this embodiment, the black second cover member 212 and the color second cover member 211 are formed into different shapes, these cover members can be formed into the same shape.

[0041] When the user operates the second cover member 21 from the closed position to the open position, the first cover member 12 for closing the ink tank 11 will be revealed (see...). Figure 1 , Figure 3C and Figure 4B The first cover member 12 is pivotally supported in a manner that allows it to move between a closed tap position (closed tap position) and a raised position (open tap position) of the ink tank 11. When the user operates the first cover member 12 from the closed tap position to the open tap position, the ink inlet 14 located on the upper part of the ink tank 11 for user ink refilling is revealed (see...). Figure 3D and Figure 4A ).

[0042] The first cover member 12 is provided with a sealing member 13 formed of an elastomer such as rubber. By operating the first cover member 12 to the closed plug position, the sealing member 13 closes the injection port 14 to prevent ink leakage contained in the ink container 11. In this embodiment, the valve unit 53 operates in conjunction with the operation of raising the first cover member 12, thereby blocking the ink supply passage 51 and the atmospheric communication passage 54 respectively. Figure 4A ).

[0043] The user can inject ink into the ink tank 11 by inserting a container (not shown) containing ink into the injection port 14. After the ink injection is complete, the user operates the first cover member 12 to the closed position again. The valve unit 53 operates in conjunction with this operation, thereby opening the ink supply passage 51 and the atmospheric connection passage 54 respectively (see...). Figure 4B Subsequently, the user operates the second cover member 21 to the closed position, thereby closing the third cover member 41. The printing device 100 is able to detect the closure of the third cover member 41 by using a cover sensor 18 configured to detect the position of the third cover member 41. Upon detecting the closure of the third cover member 41, as... Figure 4BAs shown, the printing device 100 contacts the suction cap 65 with the printhead 62 to fill the ink L in the ink tank 11 into the ink supply passage 51. Then, the ink suction mechanism 64 performs a suction operation to draw the ink L out from the ink jet outlet 63. As a result of this suction operation, the supply tube 17 constituting the ink supply passage 51 is filled with ink. In addition, during this suction operation, a large negative pressure can be applied to the ink jet outlet 63 by executing the opening and closing control of the on / off valve mechanism 160. More specifically, the suction pump of the ink suction mechanism 64 is driven while the on / off valve mechanism 160 is closed and the printhead 62 is covered by the suction cap 65. In this way, a negative pressure is generated between the on / off valve mechanism 160 and the ink jet outlet 63 of the printhead 62. Then, when the suction pump stops and the on / off valve mechanism 160 opens, ink is filled into the printhead 62 by means of the generated negative pressure. Meanwhile, the opening and closing valve mechanism 160 also has the function of blocking the ink supply passage 51 to prevent ink leakage when the printing device 100 is moved.

[0044] As described above, in this embodiment, the ink supply passage 51 is provided with two types of valves: valve unit 53 and on / off valve mechanism 160, which have independent and different functions. Specifically, valve unit 53 closes the ink supply passage 51 when filling the ink tank 11 with ink, and opens the ink supply passage 51 in other cases. On the other hand, on / off valve mechanism 160 closes the ink supply passage 51 to suppress ink leakage or to perform efficient suction when filling ink. Details of on / off valve mechanism 160 will be described later.

[0045] With the ink filled as described above, when printing an image onto a printing medium, for example, ink is ejected from the ink jet outlet 63, and ink is supplied from the ink tank 11 to the print head 62 in an amount equal to the amount of ink ejected from the print head 62. Ink is continuously supplied from the ink tank 11 to the print head 62 until the ink in the ink tank 11 is below a predetermined amount.

[0046] The above example has explained the scenario where the user performs opening and closing operations by manipulating the first cover member 12, the second cover member 21, and the third cover member 41. Alternatively, the opening and closing operations can be performed automatically by means of controls within the printing device.

[0047] <Ink Fill Sequence>

[0048] Figure 5This is a flowchart of the ink filling sequence. When starting the ink filling sequence, first in S51, the printing device 100 moves the carriage 61 holding the printhead 62 to a suction position opposite the suction cap 65. In S52, the printing device 100 brings the suction cap 65 into contact with the printhead 62. In S53, the printing device 100 performs a suction operation using the suction cap 65 to draw ink from the ink jet outlet 63 of the printhead 62. In this case, the suction operation can be performed in conjunction with the opening and closing control of the opening and closing valve mechanism 160 as discussed earlier. After the suction operation is completed, in S54, the printing device 100 removes the suction cap 65 from the printhead 62. Then, in S55, the printing device 100 moves the carriage 61 from the suction position to the standby position. Thus, the series of operations of the ink filling sequence is terminated.

[0049] <Block Diagram>

[0050] Figure 6 This is a block diagram including the structure of the printing apparatus 100 according to this embodiment. The printing apparatus 100 includes a printhead 62, an MPU 601, a ROM 602, a RAM 603, a carriage motor 604, a transport motor 605, a printhead driver 607, a carriage motor driver 608, a transport motor driver 609, and an I / F unit 613. A program serving as an image processing unit 6021 is stored in the ROM 602.

[0051] MPU 601 controls the operation and data processing of each unit. ROM 602 stores programs and data to be executed by MPU 601. RAM 603 temporarily stores processing data to be executed by MPU 601 and data received from host computer 600. Printhead 62 is controlled by printhead driver 607. Carriage 61 is driven by carriage motor 604. Carriage motor 604 is controlled by carriage motor driver 608. Feed roller, conveyor roller, and discharge roller are driven by conveyor motor 605. Conveyor motor 605 is controlled by conveyor motor driver 609. Host computer 600 includes printer driver 610, used to process printing information such as the printed image and image quality, and to communicate with printing device 100 when the user issues a command to perform a printing operation. MPU 601 exchanges printed images with host computer 600 through I / F unit 613.

[0052] <Structure of the opening and closing valve mechanism>

[0053] The following is a description of the construction and operation of the opening and closing valve mechanism 160 according to this embodiment. Figure 7A and Figure 7B This is a perspective view of the operation unit 161 in the valve mechanism 160 according to this embodiment. Figure 8 This is a perspective view showing the outline of the opening and closing valve mechanism 160 according to this embodiment. Figure 9A and Figure 9B This is a cross-sectional view showing the outline of the opening and closing valve mechanism 160 according to this embodiment. Figures 10A to 10C This is a perspective view of the opening and closing valve mechanism 160 in the state where the cover component 162 has been removed. Figure 11 It is the slave of the opening and closing valve mechanism 160. Figure 8 Stereoscopic images viewed from different perspectives. The main reference should be appropriate. Figures 7A to 11 The following description is provided.

[0054] As described above, the on / off valve mechanism 160 is a valve used to close and open (establish communication) the ink supply passage 51 formed by the supply pipe 17. Figure 1 , Figure 7A , Figure 7B and Figure 8 As shown, the on / off valve mechanism 160 includes an operating unit 161 that can be manually operated by the user. The operating unit 161 is configured to allow the user to rotate it using the operating surface 161a. The on / off valve mechanism 160 is arranged at the ink supply passage 51 and can be switched between an open state for establishing communication between the ink tank 11 and the printhead 62 and a closed state for blocking this communication by operating the operating unit 161. Additionally, as... Figure 7A and Figure 7B As shown, printing mark 166 and maintenance mark 167 are drawn at the operating position of the operating unit 161 to allow the user to visually identify the open / closed state of the valve in the valve-on / off mechanism 160. When the operating surface 161a of the operating unit 161 is at the position of printing mark 166, the valve-on / off mechanism 160 does not block the ink supply passage 51, thus allowing ink to be supplied from the ink tank 11 to the print head 62. In other words, the printing device 100 is in a state where it can print on the printing medium. On the other hand, when the operating unit 161 is rotated from the position of printing mark 166 to the position of maintenance mark 167, and the operating surface 161a is on the side indicated by maintenance mark 167, the valve-on / off mechanism 160 blocks the ink supply passage 51. As a result, ink is not supplied from the ink tank 11 to the print head 62. Therefore, with ink movement suppressed in the ink supply passage 51, the user can perform operations such as replacing the print head 62 or transporting the printing device. Meanwhile, by using the on / off valve mechanism 160 to keep the ink supply passage 51 closed during the above-mentioned suction operation, the initial filling of the print head 62 with ink or the removal of air bubbles from the ink supply passage 51 can be performed efficiently.

[0055] The opening / closing valve mechanism 160 according to this embodiment can be opened and closed manually and automatically by connecting to a drive unit. Here, the drive unit can be electrically driven by an external power source. In other words, in addition to manual operation by the user, the operation unit 161 can be switched between an open state and a closed state by driving an external drive unit. Details of this configuration will be described later.

[0056] like Figure 3B As shown, the printing device 100 includes a housing 19. Additionally, as... Figure 7A and Figure 7B As shown, the housing 19 includes an opening 190. An operation unit 161 is disposed in the opening 190. The opening 190 is formed in the housing 19 using a first wall 191, a second wall 192, and opposing surfaces 191a and 192a respectively opposite to the first wall 191 and the second wall 192. Simultaneously, the opening 190 is positioned lower in the direction of gravity than the third wall 193, which forms part of the housing 19. In other words, the operation unit 161 is disposed in a recess of the upper surface opening in the housing 19. Therefore, the user's access direction to the operation unit 161 can be restricted to only the direction of gravity, thereby reducing user error.

[0057] Meanwhile, since a cover sensor 18 is provided in this embodiment ( Figure 3B Therefore, the printing device 100 can detect whether the operation unit 161 is in a user-operable state by using the cover sensor 18.

[0058] like Figures 8 to 11 As shown, in addition to the user-operable operating unit 161, the valve opening and closing mechanism 160 includes a cover member 162, a receiving member 163, a shifting member 164, a cam 165, a holding member 169, and a drive mechanism 260. Figure 9A The open state of the valve mechanism 160 is shown. Figure 9B The closed state of the on / off valve mechanism 160 is shown. Figure 10A It is shown that appears Figure 8 The diagram shows the state after the cover component 162 has been removed. Figure 10B It is shown that appears Figure 10A A diagram showing the state after the displacement component 164 has been removed. Figure 10C It is shown that appears Figure 10B A diagram showing the state after the receiving component 163 is removed.

[0059] like Figures 8 to 9BAs shown, the cover member 162 and the retaining member 169 hold the supply tubes 17. One end of each supply tube 17 is connected to the printhead 62, and the other end is connected to the corresponding ink reservoir 11. The supply tube 17 includes a curved region that can bend as the printhead 62 moves. An on / off valve mechanism 160 is configured such that the curved region of the supply tube 17 is located between the printhead 62 and the cover member 162. In other words, the on / off valve mechanism 160 is arranged in the region of each supply tube 17 that does not move with the movement of the carriage 61.

[0060] like Figure 9A , Figure 9B and Figure 11 As shown, the shifting member 164 is a member provided with a pressurizing portion 164a that pressurizes the supply pipe 17 and is deformable in the direction that interferes with the supply pipe 17. In other words, the shifting member 164 is provided in a manner that allows it to move forward toward the supply pipe 17 and backward from the supply pipe 17. The receiving member 163 is a member for receiving the shifting member 164 that has shifted in the direction that interferes with the supply pipe 17, and includes a contact portion 163a. ​​At the same time, the first force-applying member 170 applies a force toward the holding member 169 to the receiving member 163. The receiving member 163 is provided on the opposite side of the side where the portion of the shifting member 164 is provided, across the supply pipe 17. In addition, the pressurizing portion 164a of the shifting member 164 presses the supply pipe 17a against the contact portion 163a of the receiving member 163 and flattens the supply pipe 17, thereby blocking the ink supply passage 51. As a result, the opening and closing valve mechanism 160 enters the closed state.

[0061] like Figures 8 to 10C As shown, the cam 165 includes a cam surface 165a and a cam shaft 165b. The cam 165 rotates by engaging with the operating unit 161, thereby displacing the shifting member 164. In this embodiment, as... Figures 10A to 10C As shown, the cam 165 and the operating unit 161 are separately arranged. Alternatively, the cam 165 and the operating unit 161 can be integrated together. Figure 9A and Figure 9B As shown, cam 165 is configured such that cam surface 165a contacts displacement member 164. When the user operates operation unit 161, cam 165 rotates about cam shaft 165b with the operation, and displacement member 164, pushed by cam surface 165a, is displaced accordingly. In this way, the user can block or open ink supply passage 51 via operation unit 161.

[0062] like Figure 8As shown, the drive mechanism 260 includes a drive mechanism holding unit 261, a drive transmission gear 262 serving as a drive transmission unit for transmitting drive to the operation unit 161, an intermediate gear train 263, and a motor 265. The drive mechanism holding unit 261 includes the drive transmission gear 262, the intermediate gear train 263, and the motor 265. The motor 265 includes a motor gear 264. The drive transmission gear 262 includes an engagement portion 262a to engage with the operation unit 161 (see...). Figures 12A to 13B The driving force is transmitted from the motor 265, which is connected to an external power source (not shown), to the drive transmission gear 262 via the intermediate gear train 263. The drive transmission gear 262 rotates the operating unit 161, which engages with it. Therefore, by using the cam 165 to shift the displacement member, the connection of the ink supply passage 51 can be automatically closed and established. Here, by using a worm gear for the motor gear 264 as in this embodiment, the direction of the drive transmission can be controlled in one direction from the motor 265 side toward the operating unit 161 side. However, the motor gear 264 is not limited to a worm gear, and other known gears can be used. In this embodiment, the rotation center of the drive transmission gear 262 is located approximately coaxially with the rotation center of the operating unit 161. In this way, the component size can be reduced, thereby enabling device miniaturization. However, the rotation center of the drive transmission gear 262 does not always have to be coaxially with the rotation center of the operating unit 161.

[0063] Next, the operation of closing each supply pipe 17 by means of the opening and closing valve mechanism 160 according to this embodiment will be described. Figure 9A The diagram shows a state where the shifting member 164 does not flatten the supply tube 17, and the ink supply passage 51 is connected (open state). In this open state, ink in the supply tube 17 can be supplied from the ink tank 11 to the print head 62 through the ink supply passage 51. In this case, as... Figure 7A and Figure 12A As shown, the operating surface 161a of the operating unit 161 is located on the side indicated by the printed mark 166. The user rotates the operating unit 161 by accessing the operating surface 161a with their finger. Optionally, as discussed earlier, the rotation of the operating unit 161 is performed automatically. The rotation operation can be performed manually or automatically, such that the operating surface 161a of the operating unit 161, which is in the open state, faces the side indicated by the printed mark 166. Figure 7B and Figure 12B Rotate the side indicated by maintenance mark 167 as shown. Then, as... Figure 9B As shown, the cam surface 165a of the cam 165, which is configured to rotate in response to the rotation operation of the operation unit 161, also rotates. Subsequently, the cam surface 165a causes the shifting member 164 to shift along the direction of the interference supply pipe 17.

[0064] Figure 9BThis illustrates the state where the shifting member 164 flattens the supply tube 17 and blocks the ink supply passage 51 (blocked state). Figure 9B As shown, the supply tube 17 is flattened between the shifting member 164 and the receiving member 163, thereby blocking the ink supply passage 51. In this situation, the supply tube 17 is in a state where it cannot supply ink from the ink tank 11 to the print head 62, and it is in a state where air flow is not allowed.

[0065] Here, as Figure 10C and Figure 11 As shown, this embodiment includes a plurality of receiving members 163 corresponding to the supply tube 17 for each ink color, and also includes a plurality of contact portions 163a corresponding to the supply tube 17 for each ink color. In this embodiment, a single common member is configured as a shifting member 164. Meanwhile, as... Figure 11 As shown, two pressure sections 164a are provided on the black side (BL) and the color side (CL). Furthermore, by individually flattening each supply tube 17 using the contact section 163a of each supply tube 17 and the pressure section 164a of the shifting member 164, the ink supply passage 51 can be individually blocked. As described above, this embodiment is configured to close both the black on / off valve mechanism 160 and the color on / off valve mechanism 160 by shifting the shifting member 164 in the direction of interfering with the supply tube 17. However, the present invention is not limited to this configuration. Meanwhile, this embodiment describes an example where the cam 165 for shifting the shifting member 164 and the operating unit 161 for rotating the cam 165 use a single shared component for both black and color inks. However, the present invention is not limited to this configuration. The aforementioned components constituting the on / off valve mechanism 160 can be suitably prepared to form an on / off valve mechanism 160 for each ink color. Optionally, a shared on / off valve mechanism 160 can be provided for all colors.

[0066] At the same time, such as Figure 9A and Figure 9B As shown, the opening / closing valve mechanism 160 is equipped with an opening / closing valve sensor 168 for detecting the opening / closing state of the opening / closing valve mechanism 160. In this embodiment, the opening / closing valve sensor 168 is a switch activated in a non-contact manner. When the operation unit 161 is operated manually or automatically, the detection target part 164b provided on the displacement member 164 passes through the detection unit of the opening / closing valve sensor 168, thereby activating the opening / closing valve sensor 168. Therefore, the opening / closing valve sensor 168 can detect the closed state and the open state of the opening / closing valve mechanism 160. Here, the opening / closing valve sensor 168 can instead be a contact sensor or any other known structure.

[0067] Simultaneously, various controls can be performed by linking the on / off valve sensor 168 and the cover sensor 18. For example, it is possible that the cover sensor 18 detects the open state of the third cover member 41, and then, upon detecting the closed state of the third cover member 41, the on / off valve sensor 168 detects the closed state. This could be due to, for example, a manual operation by the user causing the closed state. In this case, the printing device 100 can be used with the supply pipe 17 in a blocked state. Therefore, error notifications can be displayed on the operation display unit 611, or various initialization processes can be performed.

[0068] Automatic and manual operation of the valve opening and closing mechanism

[0069] Next, a description of the automatic and manual operation of the opening and closing valve mechanism 160 of this embodiment will be given. Figures 12A to 12C This is a cross-sectional view of the joint 262a between the operating unit 161 and the drive transmission gear 262. Figure 12A It is the state in which the supply pipe 17 is connected to the on / off valve mechanism 160, that is... Figure 9A The cross-sectional view corresponding to the open state in the diagram. Figure 12B It is the state in which the supply pipe 17 is closed by the on / off valve mechanism 160, that is... Figure 9B The cross-sectional view corresponding to the occlusion state in the diagram. Although Figures 12A to 12C Not shown, but as described above, as the cam 165 rotates with the operation unit 161, the shifting member 164 shifts to open and close. In other words, the supply pipe 17 opens and closes according to the rotation of the operation unit 161. Simultaneously, Figure 13A and Figure 13B This is a diagram used to explain the engagement relationship between the operating unit 161 and the drive transmission gear 262. Figure 13A and Figure 13B A diagram is shown showing the drive transmission gear 262 axially separated from the operating unit 161. The structure of the operating unit 161, which performs both automatic and manual opening and closing operations, will be described below.

[0070] like Figures 12A to 12C As shown, the operation unit 161 includes an operation surface 161a, a concave-convex surface 161b, a first mating surface 161c, and a second mating surface 161d. Figures 12A to 12C The first direction is the direction in which the joint 262a rotates in the forward direction, while the second direction is the direction in which the joint 262a rotates in the reverse direction. In this embodiment, when the opening and closing valve mechanism 160 is automatically opened and closed by the drive motor 265, the opening and closing valve mechanism 160 changes to an open or closed state by means of rotation in the first direction. However, the opening and closing valve mechanism 160 can be configured to change to an open or closed state by means of rotation in the second direction by the drive motor 265. Figure 12A With the supply pipe 17 connected as shown, the joint 262a engages with the first engagement surface 161c of the operating unit 161. Figure 12A In the illustrated state, by rotating the motor 265 by a predetermined amount, the engagement portion 262a rotates along a first direction. Consequently, the force for rotation along the first direction is also applied to the first engagement surface 161c, which contacts the engagement portion 262a, thereby also causing the operating unit 161 to rotate. In short, the supply pipe 17 can be directed towards the... Figure 12B The indicated closed state changes automatically. Therefore, the opening / closing valve mechanism 160 can be automatically closed. Thus, for example, when the user is printing during normal operation, the opening / closing valve mechanism 160 can be automatically closed. Therefore, the possibility of the user forgetting to manually close the valve can be reduced.

[0071] At the same time, Figure 12A In this space 171, a space 171 is formed circumferentially between the second mating surface 161d and the end of the joint 262a in a second direction. The joint 262a does not contact the second mating surface 161d within this space 171. In other words, the user can manually rotate and move the operating unit 161 within the area of ​​the space 171. In short, in Figure 12A In this state, as long as the motor 265 is not driven, the position of the engagement portion 262a of the drive transmission gear 262 will not change. On the other hand, since the space 171 is formed, the user can rotate the operating unit 161 in the first direction. As a result, the user can manually close the supply pipe 17. Figure 12A In the state shown, as the user rotates the operating unit 161 in the first direction, the second engagement surface 161d engages with the engagement portion 262a of the drive transmission gear 262.

[0072] Needless to say, it can automatically start from... Figure 12B The supply pipe 17 shown is in a blocked state as follows: Figure 12A The supply pipe 17 shown is switched to an open state. Specifically, by further rotating the motor 265 in the forward direction, the operating unit 161 will... Figure 12B The state shown Figure 12A The state shown is returned. However, the invention is not limited to this example. By reversing the rotation of motor 265, the engagement portion 262a of drive transmission gear 262 can be brought into contact with the second engagement surface 161d, and by continuing to rotate the engagement portion 262a in the second direction, the engagement portion 262a of drive transmission gear 262 can be brought into contact with the second engagement surface 161d, thereby causing the operating unit 161 to move towards... Figure 12A Returning to the indicated position. Here, by subsequently rotating the drive transmission gear 262 in the first direction, the drive transmission gear 262 (engagement portion 262a) will automatically move towards... Figure 12A Return to the indicated location.

[0073] As described above, according to this embodiment, both automatic and manual operation of the on / off valve mechanism 160 can be achieved. In this way, even if, for example, the power supply to the printing device 100 is interrupted due to an error, and the on / off valve mechanism 160 cannot close automatically, the user can manually close it. On the other hand, the on / off valve mechanism 160 can close automatically during normal operation. Therefore, for example, the on / off valve mechanism 160 can close independently of the printer's state when transporting the printing device 100. Consequently, ink leakage to the outside of the printing device 100 can be suppressed.

[0074] <<Second Implementation Method>>

[0075] The second embodiment will describe the operation of suppressing user misoperation after the supply pipe 17 is blocked. The construction of the printing device 100 is the same as that described in the first embodiment, and its explanation will be omitted.

[0076] Figure 12C This is a cross-sectional view of the operating unit 161 and the joint 262a in a state where the opening and closing valve mechanism 160 suppresses the operation of manually establishing the connection of the supply pipe 17. This embodiment will describe control under the following conditions: by means of... Figure 12B As shown, the drive motor rotates the drive transmission gear 262, automatically closing the supply pipe 17. Figure 12B In the illustrated state, space 171 is formed circumferentially between the second engagement surface 161d and the end of the engagement portion 262a of the drive transmission gear 262 in the second direction. Therefore, the user can... Figure 12B In the indicated state, the operating unit 161 is further rotated along the first direction. Therefore, even if the supply pipe 17 is already in an automatically closed state, the user can easily rotate the operating unit 161 along the first direction. If the operating unit 161 is in... Figure 12B If the device is rotated further in the first direction in the state shown, the position of the shifting member 164, which is shifted by using the cam 165 to flatten the supply tube 17, can be changed to a position that opens the supply tube 17.

[0077] In view of this situation, this embodiment is configured to limit the operation unit 161 from being manually operated by the user. Figure 12B The state shown is controlled by rotating in the first direction. More precisely, in Figure 12B In the process, after the supply pipe 17 is closed, the motor 265 rotates in the reverse direction by a predetermined amount of drive, and then... Figure 12C As shown, the joint 262a rotates and moves along the second direction. Figure 12CIn the illustrated state, a first space 171a is formed circumferentially between the joint 262a and the first engagement surface 161c, and a second space 171b is formed circumferentially between the joint 262a and the second engagement surface 161d. The second space 171b has a smaller circumferential distance than the first space 171a, and the size of the second space 171b is equivalent to a size (distance) of the cam 165 that is less than the amount of rotation that allows the shifting member 164 to keep the supply tube 17 closed. In this way, even if the user mistakenly rotates the operating surface 161a in the first direction to open the supply tube 17, the joint 262a will engage with the second engagement surface 161d before the supply tube 17 is opened. Therefore, the rotation of the operating unit 161 in the first direction can be limited. As a result, the supply tube 17 can be prevented from being unintentionally manually opened (establishing a connection), and thus ink leakage to the outside of the printing device 100 can be prevented.

[0078] When the third cover component 41 is opened after a normal blocking operation, such as Figure 7A and Figure 7B As shown, the operating unit 161 is arranged at the opening 190, which is lower than the third wall 193, and the operating surface 161a is arranged to be exposed to the opening 190. Therefore, when operating the opening / closing valve mechanism 160 after a normal blocking operation, the user can only access the operating surface 161a. Thus, it is possible to suppress the user's operation of rotating the operating unit in the second direction. As described above, this embodiment is configured to only accept the operation when the user manually rotates the operating unit 161 in the first direction. However, the present invention is not limited to this configuration. For example, the user can be allowed to rotate the operating unit 161 in... Figure 12C In the state shown, it rotates in the second direction. By allowing the user to rotate the operating unit 161 in the second direction, the operation of opening the supply pipe 17 becomes user-recognized as if... Figure 7A and Figure 7B The operation is shown in the states indicated by print mark 166 and maintenance mark 167. Therefore, the user can rotate the operating unit 161 in the second direction. Note that the shape of the operating unit 161 is not limited to that shown in other figures. Figure 7A and 7B The shape shown. The operation unit 161 can be formed in any shape, as long as the user can manually operate the operation unit 161.

[0079] Figure 14This is a flowchart illustrating an example of the processing performed by MPU 601 during a supply pipe shut-off operation. For example, this flowchart is implemented by having MPU 601 read a program stored in ROM 602, load that program into RAM 603, and then execute the program. This flowchart also begins, for example, when the printing device 100 begins the operation to close the on / off valve mechanism 160. In other words, Figure 14 A flowchart illustrating the process of automatically closing the on / off valve mechanism 160 is shown. Note that the process in this flowchart is merely an example, and the invention is not limited to this process.

[0080] In S1401, MPU601 checks whether the on / off valve sensor 168 is in the state of detecting the open state of the shift member 164. Based on the result detected by the on / off valve sensor 168, MPU601 checks the open / closed state of the shift member 164. In other words, MPU601 determines whether the shift member 164 is in the open state and the supply pipe 17 is open, or whether the shift member 164 is in the closed state and the supply pipe 17 is closed. MPU601 proceeds to the process in S1402 if the shift member 164 is open, or proceeds to the process of terminating the operation if the shift member 164 is closed.

[0081] In S1402, MPU601 rotates motor 265 forward by a predetermined amount. This drives transmission gear 262 to rotate in the first direction, enabling the on / off valve mechanism 160 to close the supply pipe 17. Subsequently, in S1403, MPU601 checks whether the on / off valve sensor 168 is in the closed state of detecting the displacement member 164. MPU601 proceeds to the process in S1404 if the displacement member 164 is closed, or to the process in S1406 if the displacement member 164 is open. Here, MPU601 records the history representing on / off valve errors and then proceeds to the termination operation process. Here, in the case of an on / off valve error, a retry process can be performed until a predetermined number of retry attempts is reached. This process can be designed to proceed to the termination operation process if the number of retry attempts exceeds the predetermined number of retry attempts.

[0082] In S1404, MPU601 stops motor 265. Subsequently, MPU601 proceeds to the process in S1405 to reverse the motor by a predetermined amount, and then stops the motor. In this way, the opening / closing valve mechanism 160 can be brought to... Figure 12C The state shown can thus prevent the user from mistakenly opening (establishing connection) the supply pipe 17 after it has been closed.

[0083] Figure 15This is a flowchart illustrating an example of the processing performed by the MPU601 in the delivery setting mode. Users may occasionally deliver the printer 100 to a service center for purposes such as repair or maintenance. When delivering the printer 100, the user can set the delivery mode using the operation display unit 611. Figure 15 The processing sequence is shown when this delivery mode is set.

[0084] As described above, since the printing device 100 may not be able to maintain a proper usage posture, there is a need to address ink leakage during delivery. Therefore, in the printing device 100 of this embodiment, the MPU 601 performs a series of processes to close the on / off valve mechanism 160 when the control mode is set to the delivery setting mode. For example, this flowchart is implemented by having the MPU 601 read the program stored in the ROM 602, load the program into the RAM 603, and then execute the program.

[0085] In S1501, MPU 601 moves the carriage 61 to the suction position opposite the suction cap 65. In S1502, MPU 601 closes the on / off valve mechanism 160. The process in S1502 corresponds to the processes from S1401 to S1405. In S1503, MPU 601 determines whether an on / off valve error exists in S1502. If the error does not exist, the process proceeds to S1504. Otherwise, the process proceeds to S1506. In S1506, MPU 601 performs the process corresponding to the on / off valve error in the delivery mode, such as pausing the delivery mode and notifying the user of the error.

[0086] In S1504, MPU601 seals the nozzle surface of printhead 62 using suction cap 65. In S1505, MPU601 performs a software shutdown process and then terminates the process. As described above, in the delivery setting mode, MPU601 performs a main system shutdown process after detecting that the on / off valve mechanism 160 is closed. Therefore, if the power to the printing device 100 is disconnected while the delivery setting mode is selected, the on / off valve mechanism 160 is indeed closed. In other words, the on / off valve mechanism 160 is automatically set to the closed state. In this way, it is possible to prevent users from forgetting to manually close the on / off valve mechanism 160 when delivering to service centers, etc., and from forgetting measures to deal with ink leakage. Note that the processes from S1501 to S1505 are merely examples, and the present invention is not limited to these processes. Meanwhile, the first embodiment can also be performed... Figure 14 and Figure 15 The aforementioned processing.

[0087] As described above, according to this embodiment, even if the on / off valve mechanism 160 fails to close automatically due to an error, the user can manually close the on / off valve mechanism 160 as in the first embodiment. In this way, even if, for example, an impact is applied to the printing device 100 during transport and the suction cap 65 detaches from the printhead 62, ink leakage from the printhead 62 can be reduced. For example, if a large-capacity ink tank 11 is provided, ink leakage from the ink tank 11 to the printhead 62 during transport can be suppressed, thereby reducing contamination of the printing device 100.

[0088] In this embodiment, after the on / off valve mechanism 160 closes the ink supply passage 51 using the drive mechanism 260, the drive mechanism 260 is driven in the reverse direction by a predetermined amount. Therefore, the engagement portion 262a is positioned to control the manual rotational movement amount of the operation unit 161. As a result, it is possible to prevent the user from mistakenly setting the on / off valve mechanism 160 to the open state after automatically closing the ink supply passage 51 using the on / off valve mechanism 160.

[0089] <<Third Implementation Method>>

[0090] The first and second embodiments have described an opening / closing valve mechanism 160 that enables both manual and automatic opening / closing operations. This embodiment will describe an opening / closing valve mechanism 160 capable of switching between manual and automatic opening / closing operations. Note that, except for the construction of the opening / closing valve mechanism 160, the construction of the printing device 100 and various processing flows are the same as in the first and second embodiments. Although the construction of the opening / closing valve mechanism 160 is also basically the same as that described in the first embodiment, the main difference lies in the part of the operating unit 161 that engages with the drive transmission gear 262. In this embodiment, the space 171 described in the first embodiment is not formed when the operating unit 161 is engaged with the engagement portion 262a of the drive transmission gear 262. The following description will mainly focus on the distinguishing features, including this aspect.

[0091] Figures 16A to 16C This is a cross-sectional view of the operating unit 161 and the drive transmission gear 262 of the opening and closing valve mechanism 160 in this embodiment. Figure 16A The diagram shows the state where the operating unit 161 is engaged with the drive transmission gear 262 at the engagement portion 262a, and the opening / closing valve mechanism 160 can only perform automatic opening and closing operations. Because the operating unit 161 is fitted into the engagement portion 262a, no space 171 is formed (see...). Figures 12A to 12C Therefore, manual opening and closing operations cannot be performed.

[0092] Figure 16BThe diagram shows the state where the operating unit 161 is away from the engagement portion 262a of the drive transmission gear 262, and the valve opening / closing mechanism 160 can only be operated manually. In short, since the drive transmission gear 262 is not engaged with the operating unit 161, the operating unit 161 will not rotate even if the drive transmission gear 262 rotates. In other words, automatic opening / closing operation is not possible. On the other hand, the user can manually perform the opening / closing operation.

[0093] The operation unit 161 in this embodiment has a claw portion 161e. For example... Figure 16A As shown, by using the second force-applying member 172, the operating unit 161 is subjected to, for example, force relative to the drive transmission gear 262. Figures 16A to 16C The force is applied in the +y direction. The cover member 162 of this embodiment includes a fourth wall 162a. The fourth wall 162a includes an opening 162b and a notch 162c. For example, the operation unit 161 can move along the ±y direction through the opening 162b. The operation unit 161 can be moved along the ±y direction by manual operation by the user. Simultaneously, a moving mechanism can be formed using a solenoid, motor, or the like (not shown). Optionally, the movement of the operation unit 161 can be performed in conjunction with the cover sensor 18.

[0094] exist Figure 16A In the process, the engagement portion 262a of the drive transmission gear 262 and the engagement portion of the operating unit 161 do not form the space 171 described in the first embodiment. Figures 12A to 12C In this state, they engage with each other, allowing the opening and closing valve mechanism 160 to perform only automatic drive operation. Although an example of a fourth wall 162a forming in the cover member 162 has been given, it can be described using... Figure 7A or Figure 7B The first wall 191 replaces the fourth wall 162a.

[0095] From the operation unit 161 Figure 16A When the state moves along the -y direction, such as Figure 16B As shown, the claw portion 161e engages with the fourth wall 162a in the y-direction. In this case, the engagement portion 262a of the drive transmission gear 262 is away from the operating unit 161 in the y-direction, and... Figures 12A-12C There is no engagement area in either the first or second direction shown. As a result, the drive mechanism 260 ( Figure 8 The drive is not transmitted to the operation unit 161. As a result, only manual operation is possible.

[0096] Figure 16C This shows the state where only automatic opening and closing operations are possible after the opening / closing valve mechanism 160 has been manually closed. Note that... Figure 16C The illustration of the cam 165, which is to engage with the operating unit 161, is omitted. The operating unit 161 is then... Figure 16B state along Figures 12A to 12C In the case of rotation in the first direction shown, such as Figure 16C As shown, the claw 161e can be rotated to a position opposite to the notch 162c. In this position, the opening / closing valve mechanism 160 can close the supply pipe 17. Next, since the claw 161e and the fourth wall 162a do not have an engagement area in the y direction when the claw 161e reaches the position opposite to the notch 162c, the operating unit 161 moves in the +y direction via the second force-applying member 172. In this way, the engagement portion 262a of the drive transmission gear 262 engages with the engagement portion of the operating unit 161 without forming the space 171, thus only the opening / closing valve mechanism 160 can be driven automatically.

[0097] In other words, when the operating unit 161 can only be operated manually, and the user closes the supply pipe 17 by operating the operating unit 161, the operating unit 161 transitions to a state where it can only perform automatic opening and closing. As described above, the opening and closing valve mechanism 160 of this embodiment can switch between automatic and manual operation. Therefore, even if the user manually operates the opening and closing valve mechanism 160 immediately after manually closing the supply pipe 17, the user cannot rotate the operating unit 161 because the operating unit 161 is connected to the drive mechanism 260. In this way, it is possible to prevent the user from mistakenly establishing the connection of the supply pipe 17 immediately after closing it.

[0098] As described above, in this embodiment, the operation unit 161 is configured to move in any direction. Furthermore, the operation unit 161 is subjected to a force toward the drive transmission gear 262 in this direction of movement and also engages with the fourth wall 162a. Therefore, the opening / closing valve mechanism 160 is configured to switch between automatic and manual operation. By configuring the opening / closing valve mechanism 160 to switch between automatic and manual operation, erroneous manual operation of the opening / closing valve mechanism 160 during the transport process of the printing device 100 can be suppressed. Therefore, ink leakage to the outside of the printing device 100 can be prevented.

[0099] The invention has been described with reference to exemplary embodiments; however, it should be understood that the invention is not limited to the disclosed exemplary embodiments. The scope of the claims should be accorded the broadest interpretation to include all such variations, equivalent structures, and functions.

Claims

1. A printing device, comprising: A container for liquids, configured to hold liquids to be supplied to a printhead, the printhead being configured to eject the liquids; A supply passage for supplying the liquid from the container to the printhead; as well as A valve, disposed at the supply passage, is configured to switch between an open state that establishes connection to the supply passage and a closed state that does not establish connection to the supply passage. The valve is characterized in that it comprises: An operating unit configured to manually operate the opening and closing of the valve; and A drive transmission unit is configured to transmit drive from a drive unit to the operation unit. in The drive transmission unit includes a joint configured to contact the operating unit, and In either a first direction or a second direction opposite to the first direction of rotation of the drive transmission unit, a space is formed between the engagement portion and the operating unit, wherein the engagement portion and the operating unit remain in non-contact in the circumferential direction of the drive transmission unit. in The valve is configured to be switched between automatic and manual operation.

2. The printing device according to claim 1, wherein, The first direction is the direction that causes the valve to change to the closed state, and In the open state of the valve, the first engagement surface of the operating unit engages with the engagement portion.

3. The printing device according to claim 1, wherein, The first direction is the direction that causes the valve to change from the open state to the closed state, and In the closed state of the valve, the circumferential distance between the first engagement surface and the engagement portion of the operating unit is greater than the circumferential distance between the second engagement surface and the engagement portion of the operating unit.

4. The printing apparatus according to any one of claims 1 to 3, wherein, The operating unit includes an operating surface configured to be manually rotated along the first direction.

5. The printing apparatus according to any one of claims 1 to 3, wherein, The rotation center of the operating unit is located approximately coaxially with the rotation center of the drive transmission unit.

6. The printing apparatus according to any one of claims 1 to 3, wherein, The drive unit is configured to rotate the drive transmission unit in the first direction and switch the valve to the closed state, and then rotate the drive transmission unit in the second direction in the opposite direction by a predetermined amount.

7. The printing apparatus according to any one of claims 1 to 3, further comprising: An opening, in which the operating unit is arranged, wherein... The opening includes a wall that is higher than the operating unit in the direction of gravity when the printing device is held in an appropriate usage posture.

8. A printing device, comprising: A container for liquids, configured to hold liquids to be supplied to a printhead, the printhead being configured to eject the liquids; A supply passage for supplying the liquid from the container to the printhead; as well as A valve, disposed at the supply passage, is configured to switch between an open state that establishes connection to the supply passage and a closed state that does not establish connection to the supply passage. The valve is characterized in that it is configured to switch between a state that can be switched automatically but not manually and a state that can be switched manually but not automatically. The valve includes: An operating unit configured to manually operate the opening and closing of the valve; and A drive transfer unit is configured to transfer drive from a drive unit to the operation unit, and The operating unit is configured to move in a direction away from the drive transmission unit.

9. The printing apparatus according to claim 8, wherein, The operating unit is subjected to a force applied by the force application unit toward the drive transmission unit in a direction opposite to the direction of departure.

10. The printing apparatus according to claim 8 or 9, wherein, The drive transmission unit includes a engagement portion for engaging with the operating unit, and In a first direction of rotation of the drive transmission unit and in a second direction opposite to the first direction, the engagement portion contacts the operating unit.

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