JP7415446B2 - liquid supply device - Google Patents

Description

The present disclosure relates to a liquid replenishment device used to replenish a liquid tank with liquid.

2. Description of the Related Art Conventionally, inkjet printers are known that are equipped with an ink tank that allows a user to replenish ink many times. A gas-liquid exchange method is known as a method for replenishing ink into such an ink tank. In this gas-liquid exchange method, ink is replenished from an ink bottle into an ink tank using an ink supply cylinder having an ink channel through which ink flows and an air channel through which air flows.

That is, the user attaches the ink supply cylinder to the injection part of the ink tank. Then, the user inserts the end of the ink supply cylinder located outside the ink tank into the tip of the ink bottle while the ink supply cylinder is attached to the injection part of the ink tank. As a result, the ink in the ink bottle flows through the ink flow path and flows out into the ink tank, while the air within the ink tank flows through the air flow path and flows out into the ink bottle. When the flow of ink in the ink flow path and the flow of air in the air flow path occur simultaneously, ink is replenished from the ink bottle to the ink tank through air-liquid exchange (e.g. , see Patent Document 1).

Japanese Patent Application Publication No. 2018-161887

However, in the conventional configuration, when the ink supply cylinder is attached to and removed from the injection part of the ink tank, especially when the ink supply cylinder is removed from the injection part of the ink tank after ink replenishment, the user's fingers are forced to supply the ink supply. There is a risk that the user may come into contact with the cylinder, and there is a problem that the user's hands and fingers may become stained with ink.

The present disclosure has been made in view of the above circumstances, and it is possible to prevent the user's fingers from coming into contact with the end of the liquid supply tube when attaching and detaching the liquid tank to the injection part of the liquid tank. To provide a liquid replenishing device capable of avoiding soiling of hands and fingers with liquid.

A liquid replenishment device according to the present disclosure includes a liquid tank having a storage chamber for storing liquid, an injection part having an injection port communicating with the storage chamber, and a first opening and a second opening. a main body having a liquid flow path formed by a third opening and a fourth opening, the main body having a liquid flow path formed by a third opening and a fourth opening; a liquid supply cylinder having a first end in which three openings are arranged, and a second end in which at least the second opening of the second opening and the fourth opening is arranged; a cap member that covers the first end located outside the liquid tank when the main body is attached to the injection part of the liquid tank; It is characterized by being removable from the injection part.

According to the liquid replenishment device according to the present disclosure, the liquid supply cylinder can be attached to and removed from the injection part together with the cap member, and when the liquid supply cylinder is attached to and removed from the injection part of the liquid tank, the user's fingers are attached to the liquid supply cylinder. The cap member can prevent contact with the end portion, and it is possible to avoid staining the user's fingers with liquid.

A perspective view schematically showing a configuration example of an ink consumption device according to a first embodiment A diagram schematically showing a configuration example of the ink replenishing device according to the first embodiment, and showing an example of a state in which an ink supply cylinder is attached to an inlet part of an ink tank. A horizontal sectional view taken along line AA in FIG. 2 of the ink supply cylinder according to the first embodiment. A diagram schematically showing an example of the configuration of the ink replenishing device according to the first embodiment, and showing an example of a state in which the ink supply cylinder is removed from the injection part of the ink tank. A diagram schematically showing an example of the configuration of the ink replenishing device according to the first embodiment, and showing an example of a state in which the ink supply cylinder is attached to the injection part of the ink tank and the cap member is removed. This figure schematically shows a configuration example of the ink replenishing device according to the first embodiment, and shows an example of a state in which the end of the ink supply cylinder is inserted into the tip of the ink bottle. A diagram showing an example of a state in which the cap member according to the first embodiment is attached to the injection part of an ink tank. A diagram schematically showing a configuration example of an ink replenishing device according to a second embodiment, and showing an example of a state in which an ink supply cylinder is removed from an inlet part of an ink tank. A diagram schematically showing a configuration example of an ink replenishing device according to a modified embodiment, and showing an example of a state in which an ink supply cylinder is attached to an inlet part of an ink tank. A diagram schematically showing a configuration example of an ink replenishing device according to a modified embodiment, and showing an example of a state in which an ink supply cylinder is attached to an injection part provided on an inclined surface of an ink tank. 1 is a diagram schematically showing a configuration example of an ink replenishing device according to a modified embodiment, and shows an example of a state in which the end of an ink supply cylinder is inserted into the tip of an ink bottle (Part 1) FIG. 2 is a diagram schematically showing a configuration example of the ink replenishing device according to the modified embodiment, and shows an example state in which the end of the ink supply cylinder is inserted into the tip of the ink bottle (Part 2)

Hereinafter, a plurality of embodiments of the liquid replenishment device of the present disclosure will be described with reference to the drawings. In addition, the same code|symbol is attached|subjected to the substantially same element in several embodiment, and the description is abbreviate|omitted.

(First embodiment)
The ink consuming device 10 illustrated in FIG. 1 is an example of a liquid consuming device, and is configured as an inkjet printer that forms an image by consuming ink on an image forming object such as a sheet. The ink consuming device 10 includes a transport path 11 approximately in the center in the left-right direction. In this case, the conveyance path 11 extends along the front-rear direction of the ink consuming device 10, and conveys the sheet, which is the image forming object, along the front-rear direction by a well-known conveyance mechanism (not shown).

The ink consumption device 10 includes a plurality of ink tanks 110 inside a main body case 12 that forms the outer shell of the ink consumption device 10 . The ink tank 110 is an example of a liquid tank, and stores ink, which is an example of a liquid, inside. The ink tank 110 is made of, for example, a transparent or translucent resin material, and the remaining amount of ink inside the ink tank 110 is visible from the outside.

The ink stored in the ink tank 110 is supplied to an ink ejection head 13 that is provided so as to be able to reciprocate in the left-right direction along the upper part of the transport path 11. Then, ink is ejected from the ink ejection head 13 onto the image forming object on the transport path 11. As a result, an image including patterns, characters, etc. is formed on the image forming object using ink. The ink stored in the ink tank 110 is, for example, cyan ink, magenta ink, yellow ink, black ink, or the like.

The ink consuming device 10 is configured to include an ink tank 110 that allows the user to replenish ink any number of times. Next, a configuration example of the ink replenishing device 100 for replenishing ink into the ink tank 110 will be described. The ink replenishing device 100 illustrated in FIGS. 2 and 4 is an example of a liquid replenishing device. The ink replenishing device 100 includes the ink tank 110 described above, and further includes an ink supply cylinder 120 and a cap member 130.

The ink tank 110 includes a storage chamber 111 that stores ink therein, and an injection part 112 into which the ink is injected. The injection part 112 has a cylindrical wall part 112a. This wall portion 112a is an example of a first cylindrical wall portion, and forms an injection port 112b communicating with the inside of the storage chamber 111. Further, a tank-side threaded portion 112c is provided on the outer peripheral surface of this wall portion 112a. This tank-side threaded portion 112c is an example of a first engaging portion.

The ink supply cylinder 120 is an example of a liquid supply cylinder. The main body 121 of the ink supply cylinder 120 has an ink flow path 122 and an air flow path 123. The ink channel 122 is an example of a liquid channel through which ink, which is an example of a liquid, flows, and is a substantially linear channel having an outer opening 122a and an inner opening 122b at both ends thereof. The outer opening 122a is an example of a first opening, and the inner opening 122b is an example of a second opening. The air flow path 123 is an example of a gas flow path through which air, which is an example of a gas, flows, and is a substantially linear flow path having an outer opening 123a and an inner opening 123b at both ends thereof. The outer opening 123a is an example of a third opening, and the inner opening 123b is an example of a fourth opening. When the ink supply cylinder 120 is attached to the injection part 112 of the ink tank 110, the main body part 121 has a generally cylindrical shape extending in the vertical direction, and as illustrated in FIG. The horizontal cross-sectional shape of each of the air passages 123 and 123 is semicircular. Further, the ink flow path 122 and the air flow path 123 have their semicircular arc side portions facing outward.

The main body 121 of the ink supply cylinder 120 has an outer end 120A and an inner end 120B at both ends thereof. The outer end 120A is an example of a first end, and in this case, the outer opening 122a of the ink flow path 122 and the outer opening 123a of the air flow path 123 are arranged at the outer end 120A. On the other hand, the inner end 120B is an example of a second end, and in this case, the inner opening 122b of the ink flow path 122 is arranged at the inner end 120B. In this case, the inner opening 123b of the air flow path is located between the outer end 120A and the inner end 120B and closer to the inner end 120B. Therefore, the ink supply cylinder 120 has a structure in which the ink flow path 122 and the air flow path 123 have different lengths, and in this case, the air flow path 123 is shorter than the ink flow path 122.

Further, the main body portion 121 of the ink supply cylinder 120 further includes a flange portion 124. In this case, the flange portion 124 is provided between the outer end 120A and the inner end 120B. The flange portion 124 is provided so as to surround the main body portion 121 of the ink supply cylinder 120 having an ink flow path 122 and an air flow path 123. Further, the flange portion 124 has a cylindrical wall portion 124a. This wall portion 124a is an example of a second cylindrical wall portion, and when the main body portion 121 of the ink supply cylinder 120 is attached to the inlet port 112b of the ink tank 110, the outer periphery of the wall portion 112a of the injection portion 112 is It is placed to cover the surface. Furthermore, a supply cylinder side screw portion 124b is provided on the inner circumferential surface of this wall portion 124a. This supply cylinder side screw portion 124b is an example of a second engaging portion.

In this case, the tank-side threaded portion 112c and the supply cylinder-side threaded portion 124b are configured as threaded portions that can be screwed together. Therefore, the main body portion 121 of the ink supply cylinder 120 is removably attached to the inlet 112b of the ink tank 110 by threaded engagement between the tank side screw portion 112c and the supply cylinder side screw portion 124b.

Further, the flange portion 124 further has a cylindrical wall portion 124c on the opposite side to the wall portion 124a described above. This wall portion 124c forms a circular opening around the outer end 120A of the ink supply cylinder 120 into which a cap member 130, which will be described later, is inserted. Further, the opening diameter of the wall portion 124c is smaller than the opening diameter of the wall portion 124a.

Further, the main body portion 121 of the ink supply cylinder 120 is provided with an outlet hole 125. In this case, the outlet hole 125 is provided in a portion of the flange portion 124 between the main body portion 121 and the wall portion 124c, and passes through the flange portion 124 along the axial direction of the main body portion 121. When ink leaks from the outer end 120A of the main body 121 of the ink supply cylinder 120, that is, the end where the outer opening 122a and the outer opening 123a are arranged, the outlet hole 125 is used to remove the leaked ink. It leads into the ink tank 110.

The cap member 130 integrally includes a large diameter portion 131, an inner small diameter portion 132, and an outer small diameter portion 133. The large diameter portion 131 constitutes the main body of the cap member 130, and is the largest portion of the cap member 130. The inner small diameter portion 132 is a portion having a smaller diameter than the large diameter portion 131, and is inserted into the opening formed by the wall portion 124c of the flange portion 124. The outer small diameter portion 133 is a small diameter portion provided on the opposite side of the inner small diameter portion 132 in the cap member 130. When attaching and detaching the cap member 130, the user preferably holds the small outer diameter portion 133 or the large diameter portion 131 as a grip portion for attaching and detaching the cap member 130. At this time, it is easier for the user to attach and detach the cap member 130 by having the outer peripheral surface of the larger diameter portion 131, which is the larger portion of the outer small diameter portion 133 and the large diameter portion 131.

In the cap member 130, a recessed portion 132a is provided at the center of the small inner diameter portion 132, and extends to the middle of the large diameter portion 131. When the small inner diameter portion 132 of the cap member 130 is inserted into the opening formed by the wall portion 124c of the flange portion 124, the outer end 120A of the ink supply cylinder 120 is accommodated in the recess 132a of the small inner diameter portion 132. Ru. That is, the cap member 130 is a member capable of covering the outer end 120A located on the outer side of the ink tank 110 when the main body 121 of the ink supply cylinder 120 is attached to the inlet 112b of the ink tank 110. It has become.

According to the ink replenishing device 100 configured as described above, as illustrated in FIGS. 2 and 4, the main body 121 of the ink supply cylinder 120 is removably attached to the inlet 112b of the ink tank 110 together with the cap member 130. It becomes.

That is, the user holds the wall portion 124a of the flange portion 124 of the ink supply cylinder 120 to which the cap member 130 is attached, and holds the ink supply cylinder so that the tank-side threaded portion 112c and the supply cylinder-side threaded portion 124b engage with each other. By turning 120 together with the cap member 130, the ink supply cylinder 120 can be attached to the inlet 112b of the ink tank 110. At this time, the direction in which the ink supply cylinder 120 is rotated is not the vertical direction but mainly the horizontal direction.

Further, the user holds the wall portion 124a of the flange portion 124 of the ink supply cylinder 120 to which the cap member 130 is attached, and holds the ink supply so that the tank-side threaded portion 112c and the supply cylinder-side threaded portion 124b are disengaged. By turning the cylinder 120 together with the cap member 130, the ink supply cylinder 120 can be removed from the inlet 112b of the ink tank 110. At this time, the direction in which the ink supply cylinder 120 is rotated is not the vertical direction but mainly the horizontal direction.

Furthermore, when replenishing ink into the ink tank 110, the user attaches the ink supply cylinder 120 and the cap member 130 to the inlet 112b of the ink tank 110, as illustrated in FIG. As illustrated, the cap member 130 is removed from the ink supply cylinder 120. Then, as illustrated in FIG. 6, with the ink supply cylinder 120 attached to the inlet 112b of the ink tank 110, the user selects the end of the ink supply cylinder 120 located outside the ink tank 110, in this case, Insert the outer end 120A into the tip 201 of the ink bottle 200. Note that an insertion portion 201a is provided at the tip portion 201 of the ink bottle 200, and the insertion portion 201a is inserted into an opening formed by the wall portion 124c of the flange portion 124.

When the outer end 120A of the ink supply cylinder 120 is inserted into the tip 201 of the ink bottle 200 in this way, the ink contained in the ink bottle 200 flows into the ink flow path 122 as illustrated by arrow A. On the other hand, the air in the storage chamber 111 of the ink tank 110 flows through the air flow path 123 and flows out into the ink bottle 200 as illustrated by arrow B. do. Since the flow of ink in the ink flow path 122 and the flow of air in the air flow path 123 occur simultaneously, air flows from the inside of the ink bottle 200 into the storage chamber 111 of the ink tank 110 through gas-liquid exchange. Ink is replenished.

Note that ink replenishment based on such gas-liquid exchange is performed when the ink level in the storage chamber 111 of the ink tank 110 is at the end of the air flow path 123, in this case, the inner opening 123b, which is an example of the fourth opening. It will stop automatically when it reaches . That is, the replenishment of ink based on gas-liquid exchange is automatically stopped when the inner opening 123b of the air flow path 123 is blocked by the ink in the ink tank 110.

Furthermore, as illustrated in FIG. 7, the cap member 130 can also be attached to and detached from the inlet 112b of the ink tank 110. That is, in this case, the opening diameter of the inlet 112b of the ink tank 110 is the same as the opening diameter of the opening formed by the wall portion 124c of the flange portion 124. Therefore, it is possible to insert the small inner diameter portion 132 of the cap member 130 into the opening formed by the wall portion 124c of the flange portion 124. In other words, the cap member 130 is a lid that closes the inlet 112b of the ink tank 110. It can also be used as a component.

According to the ink replenishing device 100 configured as described above, the ink supply cylinder 120 and the cap member 130 can be attached to and detached from the inlet 112b of the ink tank 110. According to this configuration, when the ink supply cylinder 120 is attached to and removed from the inlet 112b of the ink tank 110, the user's fingers touch the end of the ink supply cylinder 120, particularly the outer end 120A located on the outside of the ink tank 110. This can be prevented by the cap member 130, and it is possible to avoid staining the user's fingers with ink.

Further, according to the ink replenishing device 100, the inner opening 123b of the air flow path 123 is arranged between the outer end 120A and the inner end 120B of the main body 121 of the ink supply cylinder 120. That is, the air flow path 123 is shorter than the ink flow path 122. According to this configuration, ink can be replenished to a position higher than the height of the inner opening 123b of the air flow path 123, in other words, the height of the inner opening 122b of the ink flow path 122, and the storage of the ink tank 110 More ink can be replenished into the chamber 111. Note that the inner opening 123b of the air flow path 123 may be arranged at the inner end 120B of the main body 121 of the ink supply cylinder 120. That is, the ink supply cylinder 120 may have a configuration in which the ink flow path 122 and the ink flow path 122 have the same length.

The main body 121 of the ink supply cylinder 120 has a flange 124 between the outer end 120A and the inner end 120B. Thus, it is provided so as to surround the ink flow path 122 and the air flow path 123. According to this configuration, the user can attach and detach the ink supply cylinder 120 by holding the flange part 124 without directly contacting the main body part 121 of the ink supply cylinder 120, and the user's fingers are free to ink. It is possible to more reliably avoid contamination.

Further, the main body portion 121 of the ink supply cylinder 120 is removably attached to the inlet 112b of the ink tank 110 by threaded engagement between the tank side screw portion 112c and the supply cylinder side screw portion 124b. According to this configuration, the ink supply cylinder 120 can be easily attached to the inlet 112b of the ink tank 110, and the ink supply cylinder 120 can be easily removed from the inlet 112b of the ink tank 110. That is, since the ink supply cylinder 120 can be easily attached and detached by screwing together the screw portion, it is possible to more reliably prevent the user's fingers from getting dirty with ink.

Further, the cap member 130 can also be attached to and detached from the inlet 112b of the ink tank 110. According to this configuration, when using the ink bottle 200 of the gas-liquid exchange type, the user can use the cap member 130 as a cover member of the ink supply cylinder 120; When used, the cap member 130 can be used as a lid member that closes the inlet 112b of the ink tank 110. That is, it is possible to support either the gas-liquid exchange method or the pumping method according to the user's preference, and it is possible to improve the usability. In the pumping method, the user inserts the tip of the ink bottle into the inlet 112b of the ink tank 110 and repeatedly crushes the main body of the ink bottle, thereby pumping the ink inside the ink bottle into the ink tank 110. In this method, the storage chamber 111 is replenished.

Further, the main body 121 of the ink supply cylinder 120 is provided with an outlet hole 125, and the outer end 120A of the main body 121 of the ink supply cylinder 120, that is, the outer opening 122a and the air flow path When ink leaks from the end where the ink tank 123 is disposed, the leaked ink can be guided into the storage chamber 111 of the ink tank 110. According to this configuration, it is possible to suppress leaked ink from adhering to the outer surface of the ink supply cylinder 120, particularly to the outer surface of the flange portion 124, which is a portion held by the user when attaching and detaching the ink, and the user's fingers and fingers It is possible to more reliably prevent the ink from becoming stained with ink.

(Second embodiment)
This embodiment differs from the above-described embodiments in the manner in which the ink supply cylinder 120 engages with the inlet 112b of the ink tank 110. That is, as illustrated in FIG. 8, a groove 300 is provided on the outer peripheral surface of the inlet 112b of the ink tank 110. Groove portion 300 is an example of a first engaging portion. The groove portion 300 is configured to integrally include a vertical groove portion 300a extending in the vertical direction and a horizontal groove portion 300b extending in the horizontal direction from the lower end of the vertical groove portion 300a.

On the other hand, a protrusion 301 is provided on the inner peripheral surface of the wall 124a of the flange 124. The protruding portion 301 is an example of a second engaging portion that can be engaged with the groove portion 300.

When attaching the ink supply cylinder 120 to the inlet 112b of the ink tank 110, the user first holds the wall part 124a of the flange part 124 of the ink supply cylinder 120 to which the cap member 130 is attached, and first inserts the upper and lower groove parts 300a of the groove part 300. The ink supply cylinder 120 is moved downward so that the protrusion 301 moves along. Then, the user rotates the ink supply cylinder 120 in the horizontal direction so that the protrusion 301 moves along the horizontal groove 300b of the groove 300. Thereby, the ink supply cylinder 120 can be attached to the inlet 112b of the ink tank 110.

Furthermore, when removing the ink supply cylinder 120 from the inlet 112b of the ink tank 110, the user first holds the wall part 124a of the flange part 124 of the ink supply cylinder 120 to which the cap member 130 is attached, and first The ink supply cylinder 120 is rotated in the horizontal direction so that the protrusion 301 moves along the groove 300b. Then, the user moves the ink supply cylinder 120 upward so that the projection 301 moves along the upper and lower grooves 300a of the groove 300. Thereby, the ink supply cylinder 120 can be removed from the inlet 112b of the ink tank 110.

Also in the second embodiment configured as described above, the ink supply cylinder 120 and the cap member 130 can be attached to and detached from the inlet 112b of the ink tank 110. Therefore, when attaching and detaching the ink supply cylinder 120 to and from the inlet 112b of the ink tank 110, the user's fingers come into contact with the end of the ink supply cylinder 120, particularly the outer end 120A located on the outside of the ink tank 110. This can be suppressed by the cap member 130, and it is possible to avoid staining the user's fingers with ink.

Furthermore, the main body 121 of the ink supply cylinder 120 is removably attached to the inlet 112b of the ink tank 110 by engaging the groove 300 and the projection 301. According to this configuration, the ink supply cylinder 120 can be easily attached to the inlet 112b of the ink tank 110, and the ink supply cylinder 120 can be easily removed from the inlet 112b of the ink tank 110. That is, since the ink supply cylinder 120 can be easily attached and detached by engaging the groove and the protrusion, it is possible to more reliably prevent the user's fingers from getting dirty with ink.

Note that the groove portion 300 may be configured to include an inclined groove portion that slopes downward toward the horizontal groove portion 300b instead of the upper and lower groove portions 300a. In this case, the inclined groove portion may be a linearly inclined groove portion or a curved groove portion. Alternatively, a protrusion may be provided on the outer peripheral surface of the wall 112a of the ink tank 110, and a groove may be provided on the inner peripheral surface of the wall 124a of the flange 124 of the ink supply cylinder 120.

(Other embodiments)
Note that the present disclosure is not limited to the plurality of embodiments described above, and various modifications and expansions can be made without departing from the gist thereof. For example, the plurality of embodiments described above may be appropriately selected and combined. In addition, at least the second opening of the second opening and the fourth opening may be disposed at the second end of the ink supply cylinder 120, but it is also possible that both the second opening and the fourth opening are disposed. good.

Further, as illustrated in FIG. 9, the ink supply cylinder 120 may further include a cylindrical wall portion 124d outside the wall portion 124c of the flange portion 124. This wall portion 124d can be constructed by extending the wall portion 124a toward the wall portion 124c. According to this configuration, it is possible to secure a large area for the user to hold when attaching and detaching the ink supply tube 120 to and from the inlet 112b of the ink tank 110, making it easier to attach and detach the ink supply tube 120. Note that the diameter of the wall portion 124d may be the same as the diameter of the wall portion 124a, or may be different from the diameter of the wall portion 124a.

Further, as illustrated in FIG. 10, the ink supply cylinder 120 can be attached and detached together with the cap member 130 to the injection part 112 provided on the inclined surface of the ink tank 110 that intersects with the imaginary vertical direction. be. In this case, the front wall surface of the ink tank 110 may extend along a virtual vertical direction. According to this configuration, since the injection part 112 is provided on the inclined surface that slopes toward the user, the user can easily attach and detach the ink supply cylinder 120 to and from the injection part 112 of the ink tank 110 together with the cap member 130, and , it is easy to replenish ink into the storage chamber 111 of the ink tank 110.

Further, as illustrated in FIG. 11, the flange portion 124 may be configured to include a rib 126 inside the wall portion 124a. This rib 126 is provided at least outside the outlet hole 125. According to this configuration, the ribs 126 can prevent the ink flowing out from the outlet hole 125 from heading to the outside, that is, the side opposite to the main body 121 of the ink supply cylinder 120, and the ink flowing out from the outlet hole 125 can be efficiently guided into the storage chamber 111 of the ink tank 110.

Further, as illustrated in FIG. 12, the flange portion 124 may have a configuration in which the outlet hole 125 is arranged so as to be in contact with the main body portion 121 of the ink supply cylinder 120. According to this configuration, the ink flowing out from the outlet hole 125 flows along the outer peripheral surface of the main body 121 of the ink supply cylinder 120, and the ink flowing out from the outlet hole 125 is transferred to the storage chamber 110 of the ink tank 110. can be efficiently guided within. In this case, the flange portion 124 may include a rib 126 at a portion inside the wall portion 124a and outside the outlet hole 125. According to this configuration, the ink flowing out from the outlet hole 125 can be guided to the main body 121 side of the ink supply cylinder 120 by the rib 126, and the ink can be easily transmitted to the outer peripheral surface of the main body 121 of the ink supply cylinder 120. I can do it. Further, the flange portion 124 may include an inclined surface portion 127 that slopes downward toward the lead-out portion 125 at a portion inside the wall portion 124c and outside the lead-out portion 125. According to this configuration, the ink leaked from the outer end 120A of the ink supply cylinder 120 can be easily flowed toward the outlet portion 125, and the ink can flow into the storage chamber 111 of the ink tank 110 through the outlet hole 125. Derivation can be further promoted.

100: ink replenishment device (liquid replenishment device), 110: ink tank (liquid tank), 111: storage chamber, 112: injection section, 112a: wall (first cylindrical wall), 112b: injection port, 112c: Tank side screw part (first engagement part, screw part), 120: Ink supply cylinder (liquid supply cylinder), 120A: Outer end (first end), 120B: Inside end (second end), 121: Main body part , 122: Ink flow path (liquid flow path), 122a: Outside opening (first opening), 122b: Inside opening (second opening), 123: Air flow path (gas flow path), 123a: Outside opening (third opening). opening), 123b: inner opening (fourth opening), 124: flange portion, 124a: wall portion (second cylindrical wall portion), 124b: supply cylinder side threaded portion (second engagement portion, threaded portion), 125 : Derivation hole, 130: Cap member, 300: Groove (first engagement part), 301: Projection (second engagement part)

Claims (8)

A liquid tank having a storage chamber for storing liquid and an injection part having an injection port communicating with the storage chamber;
The main body has a liquid flow path formed by a first opening and a second opening, and a gas flow path formed by a third opening and a fourth opening, and the main body is detachable from the injection part. A first end where the first opening and the third opening are arranged, and a second end where at least the second opening of the second opening and the fourth opening is arranged. a liquid supply cylinder having;
a cap member that covers the first end located outside the liquid tank when the main body part of the liquid supply tube is attached to the injection part of the liquid tank;
Equipped with
The liquid supply cylinder is removable from the injection part together with the cap member ,
The liquid replenishing device characterized in that the cap member is also removably attachable to the injection section . The liquid replenishing device according to claim 1, wherein the fourth opening is located between the first end and the second end. The main body portion has a flange portion between the first end and the second end,
3. The liquid replenishing device according to claim 1, wherein the flange portion is provided so as to surround the liquid flow path and the gas flow path. The injection part of the liquid tank has a first cylindrical wall part forming the injection port,
The first cylindrical wall portion has a first engaging portion on its outer peripheral surface,
The flange portion of the liquid supply cylinder has a second cylindrical wall portion that covers an outer peripheral surface of the first cylindrical wall portion,
The second cylindrical wall portion has a second engaging portion on its inner circumferential surface that engages with the first engaging portion,
4. The main body portion of the liquid supply cylinder is removably attached to the injection portion of the liquid tank by engagement between the first engaging portion and the second engaging portion. Liquid replenishment device as described. 5. The liquid replenishing device according to claim 4, wherein the first engaging part and the second engaging part are constituted by threaded parts that can be screwed together. The first engaging portion is configured of one of a protrusion and a groove,
5. The liquid replenishing device according to claim 4, wherein the second engaging portion is formed by the other of a protrusion and a groove. The liquid replenishing device according to any one of claims 1 to 6 , wherein the main body includes an outlet hole that guides liquid leaked from the first opening and the third opening into the liquid tank. . A liquid tank having a storage chamber for storing liquid and an injection part having an injection port communicating with the storage chamber;
The main body has a liquid flow path formed by a first opening and a second opening, and a gas flow path formed by a third opening and a fourth opening, and the main body is detachable from the injection part. A first end where the first opening and the third opening are arranged, and a second end where at least the second opening of the second opening and the fourth opening is arranged. a liquid supply cylinder having;
a cap member that covers the first end located outside the liquid tank when the main body part of the liquid supply tube is attached to the injection part of the liquid tank;
Equipped with
The injection part is provided on an inclined surface of the liquid tank,
The liquid supply cylinder is removable together with the cap member to the injection part provided on the inclined surface ,
The liquid replenishing device characterized in that the cap member is also removably attachable to the injection section .

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