CN211808462U

CN211808462U - Ink tank and ink jet printer

Info

Publication number: CN211808462U
Application number: CN201921862299.6U
Authority: CN
Inventors: 田村光; 石部阳雅; 刑部吉记
Original assignee: Brother Industries Ltd
Current assignee: Brother Industries Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-10-30
Anticipated expiration: 2029-10-31

Abstract

The utility model relates to an ink tank and an ink-jet printer, wherein the ink tank comprises an ink tank body, the ink tank body comprises an ink storage chamber, an ink injection port and an ink injection cylinder, and the ink storage chamber is provided with a bottom wall; the ink injection port is communicated with the ink storage chamber; the ink filling cylinder is provided with a body part, the body part is provided with a first end and a second end and comprises a first flow path pipe and a second flow path pipe, the first flow path pipe is provided with a first opening, a second opening and a first flow path, and the distance from the first opening to the first end is smaller than the distance from the second opening to the first end; the second flow path pipe is provided with a third opening, a fourth opening and a second flow path, and the distance from the third opening to the first end is smaller than the distance from the fourth opening to the first end; the ink injection cylinder extends through the ink injection port, and the shortest distance between the second opening and the bottom wall is greater than 0 and less than or equal to 2.5 mm; the upper surface of diapire includes the water conservancy diversion portion of slope, and the projection of second opening on the horizontal plane lies in the projection of water conservancy diversion portion on the horizontal plane at least partially, and the contained angle of water conservancy diversion portion and horizontal plane is greater than or equal to 2.4.

Description

Ink tank and ink jet printer

Technical Field

The utility model relates to a printing apparatus technical field specifically, relates to an china ink jar and ink jet printer.

Background

An inkjet printer generally performs printing by ejecting ink from a recording unit onto a recording medium (for example, printing paper).

Fig. 1 schematically shows an example of an existing ink jet printer 1. Hereinafter, for convenience of description, a direction in which the ink jet printer 1 faces the user is defined as "front", a direction opposite thereto is defined as "rear", and a left-hand side of the user is defined as "left", and a right-hand side of the user is defined as "right", with reference to a position at which the user uses the ink jet printer 1.

As shown in fig. 1, the inkjet printer 1 includes a printer body 2 and four ink tanks 10 provided on one side (e.g., the front side) of the printer body 2. The printer body 2 includes a frame portion 3, and four ink tanks 10 are provided in the frame portion 3. One of the ink tanks 10 is disposed in the front left of the frame portion 3, and the other three ink tanks 10 are disposed side by side in the front right of the frame portion 3. The ink tank 10 is for containing ink to be supplied to the recording portion 9. The ink tanks 10 at the front of the left side may contain black ink, and the three ink tanks 10 at the front of the right side may contain cyan, magenta, and yellow inks, respectively, so that the print content of the ink jet printer 1 has a richer color. Ink may be generally injected into the ink tank 10 through an ink bottle (not shown) containing ink.

As shown in fig. 2, the ink tank 10 mainly includes an ink tank body 30 and an ink filling cylinder 20, the ink filling cylinder 20 is detachably connected to the ink tank body 30, for example, the ink filling cylinder 120 may be snap-fitted to the ink tank body 130.

The ink tank body 30 mainly includes an ink storage chamber 31, an ink filling portion 33, an ink supply portion 35, and an atmosphere communication portion 36. Specifically, the ink tank body 30 may be constituted by two parts of a resin frame 19 and a coating film 39, the resin frame 19 may be molded from a resin material by an injection molding process, and the coating film 39 is covered on one side (e.g., the left side) of the resin frame 19. The resin frame 19 is provided with a number of cavities having an inner space for forming ink tanks 31 and the like. These cavities have a lateral opening (e.g. an opening that opens towards the left). The cover film 39 is connected to the resin frame 19 by a connection means such as adhesion or the like to cover the lateral opening, so that both the resin frame 19 and the cover film 39 can collectively form the ink reservoir 31 or the like. The ink filling portion 33, the ink supply portion 35, and the atmosphere communication portion 36 are provided in the resin frame 19.

The ink reservoir chamber 31 is for accommodating ink to be supplied to the recording portion 9. The ink injection portion 33 is located at the top of the ink reservoir 31 and has an ink injection port 32. Ink can be injected into the ink tank body 30 through the ink injection port 32 so as to be contained in the ink reservoir 31. The ink supply portion 35 is located above the ink reservoir 31, and is used to supply ink in the ink reservoir 31 to the recording portion 9. The atmosphere communication portion 36 is located at a lower position of the ink tank body 30, and includes an atmosphere communication port 37, and the atmosphere communication port 37 can communicate the ink reservoir 31 with the atmosphere.

As shown in fig. 3, the ink cartridge 20 has a body portion 21 extending in the longitudinal direction. The body portion 21 includes a first flow path tube 40 and a second flow path tube 50 extending in the longitudinal direction. The first flow path pipe 40 has a first opening 41, a second opening 42, and a first flow path 43 formed between the first opening 41 and the second opening 42. The second flow path tube 50 has a third opening 51, a fourth opening 52, and a second flow path 53 formed between the third opening 51 and the fourth opening 52. The ink feed barrel 20 may extend through the ink feed port 32 of the ink tank body 30 and be mounted on the ink tank body 30 such that the first and

third openings

41, 51 are located above the top of the ink feed port 32 and the second and

fourth openings

42, 52 are located in the ink reservoir 31 and spaced from the bottom wall of the ink reservoir 31.

Referring back to fig. 2, after the ink cartridge 20 is mounted on the ink tank body 30, the bottle opening of the ink bottle may be inserted into the ink filling part 33 of the ink tank body 30 to cover the top end of the ink cartridge 20. In this way, ink in the ink bottle can enter the first flow path 43 or the second flow path 53 through the first opening 41 or the third opening 51, and then enter the ink reservoir 31 through the second opening 42 or the fourth opening 52. Meanwhile, air in the ink reservoir 31 can enter the ink bottle through the other of the first flow path 43 and the second flow path 53. In this case, the flows of ink and air are simultaneously generated in the two flow paths, respectively, and "gas-liquid replacement" is performed.

When either one of the flow of ink or the flow of air is stopped, the gas-liquid replacement process is stopped. Ideally, the priming process stops when the ink in reservoir 31 is full (the ink level reaches or is higher than the two openings of the ink cartridge 20 located in reservoir 31) or the ink in the ink bottle is completely filled into reservoir 31.

The applicant found that the ink tank 10 shown in fig. 2 is susceptible to a phenomenon in which the ink supply is temporarily stopped during actual use. That is, only a small amount of ink is filled from the ink bottle into the ink tank body 30, and when the supply is temporarily stopped, the ink bottle still contains ink, and a large amount of space in the ink reservoir 31 is still not filled with ink. The applicant speculates that due to the ink replenishment process, a meniscus (meniscus) is formed by the ink at the second opening 42 and/or the fourth opening 52 of the ink cartridge 20 located in the ink reservoir 31, preventing further flow of the ink.

Therefore, there is a need for an ink tank and an inkjet printer to at least partially solve the above problems in the prior art.

SUMMERY OF THE UTILITY MODEL

In the summary section a series of concepts in a simplified form is introduced, which will be described in further detail in the detailed description section. The inventive content does not imply any attempt to define the essential features and essential features of the claimed solution, nor is it implied to be intended to define the scope of the claimed solution.

In order to solve the above problem at least in part, according to a first aspect of the present invention, there is provided an ink tank for an inkjet printer, the inkjet printer including a recording portion, the ink tank including an ink tank body, the ink tank body including:

an ink reservoir chamber for containing ink to be supplied to the recording portion, the ink reservoir chamber having a bottom wall; and

an ink injection port in communication with the ink reservoir; and

an ink-jet cartridge having a body portion extending in a longitudinal direction, the body portion having a first end and a second end opposite the first end in the longitudinal direction, the body portion comprising:

a first flow path pipe extending in the longitudinal direction and having a first opening, a second opening, and a first flow path formed between the first opening and the second opening, a distance from the first opening to the first end being smaller than a distance from the second opening to the first end;

a second flow path tube extending in the longitudinal direction and having a third opening, a fourth opening, and a second flow path formed between the third opening and the fourth opening, a distance from the third opening to the first end being smaller than a distance from the fourth opening to the first end being smaller than a distance from the second opening to the first end;

the ink filling barrel extends through the ink filling port, the first opening and the third opening are located outside the ink storage chamber, the first flow path is communicated with the ink storage chamber through the second opening, the second flow path is communicated with the ink storage chamber through the fourth opening, the second opening faces the bottom wall and is spaced from the bottom wall, and the shortest distance between the second opening and the bottom wall is smaller than or equal to 2.5 mm;

wherein, the upper surface of diapire includes the water conservancy diversion portion of slope relative to the horizontal direction, the projection of second opening on the horizontal plane is located at least partly the projection of water conservancy diversion portion on the horizontal plane, the contained angle of water conservancy diversion portion with the horizontal plane is greater than or equal to 2.4.

According to the utility model discloses an ink tank is provided with the water conservancy diversion portion for the horizontal direction slope through the upper surface with the diapire of storing up the ink chamber to make the projection of second opening on the horizontal plane at least partially be located the projection of water conservancy diversion portion on this horizontal plane, water conservancy diversion portion can play the effect of water conservancy diversion to the ink, in order to avoid the ink to stop between second opening and water conservancy diversion portion when annotating the ink, thereby can reduce the possibility of forming meniscus at the second opening part at the in-process of annotating the ink, in order to avoid the phenomenon of ink supply in-process temporary stop.

Optionally, an included angle between the flow guide portion and the horizontal plane is greater than or equal to 3 °.

According to the scheme, the possibility of meniscus formation at the second opening in the ink filling process can be further reduced, so that the phenomenon of temporary stop in the ink supply process can be further avoided.

Optionally, the ink storage chamber has a side wall, a first end wall and a second end wall connected to the bottom wall, the first end wall and the second end wall are connected to the side wall and disposed on two sides of the side wall, the ink injecting tubes are disposed between the first end wall and the second end wall at intervals, and a distance between the ink injecting tubes and the first end wall is smaller than a distance between the ink injecting tubes and the second end wall.

According to the scheme, the ink storage chamber is simple in structure, and the ink injection cylinders are arranged between the first end wall and the second end wall at intervals so as to be convenient to install the ink injection cylinders.

Optionally, the flow guide is configured to extend obliquely downward in a direction from the first end wall toward the second end wall.

According to the present aspect, the ink flows on the flow guide portion in the direction from the first end wall toward the second end wall when the ink is injected.

Optionally, the flow guide is connected to the first end wall.

According to the scheme, the flow guide part can have a larger area, so that the flow guide effect of the flow guide part is improved.

Optionally, the plane of the second opening is parallel to the horizontal plane.

According to the scheme, the ink injection cylinder is simple in structure and convenient to manufacture, and therefore production cost is reduced.

Optionally, the plane of the second opening is inclined to the horizontal plane and configured to extend obliquely downwards in a direction from the first end wall towards the second end wall.

Optionally, a plane of the second opening is parallel to the flow guide portion.

According to the present aspect, the possibility of meniscus formation at the second opening during ink supply can be further reduced, so that a temporary stop during ink supply can be avoided.

Optionally, the upper surface of diapire includes the inclined plane, the inclined plane be located the internal surface of first endwall with between the water conservancy diversion portion, the water conservancy diversion portion with the contained angle of horizontal plane is greater than the inclined plane with the contained angle of horizontal plane.

According to the scheme, the flow guide part is ensured to have a smaller area, the possibility of meniscus formation at the second opening in the ink injection process can be further reduced, and the phenomenon of temporary stop in the ink supply process can be avoided.

According to a second aspect of the present invention, there is disclosed an ink jet printer comprising a recording portion and an ink tank according to any one of the above first aspects.

According to the utility model discloses an ink jet printer, the upper surface through the diapire with the ink storage chamber of china ink jar is provided with the water conservancy diversion portion for the horizontal direction slope to make the projection of second opening on the horizontal plane at least partially be located the projection of water conservancy diversion portion on this horizontal plane, the water conservancy diversion portion can play the effect of water conservancy diversion to the ink, in order to avoid the ink to stop between second opening and water conservancy diversion portion when annotating the ink, thereby can reduce the possibility of forming meniscus at the second opening part at the in-process of annotating the ink, in order to avoid the phenomenon that the ink supply in-process stops temporarily.

Drawings

The above and other aspects of the present invention will become more apparent and more readily appreciated from the following description of the exemplary embodiments of the invention taken in conjunction with the accompanying drawings, in which:

fig. 1 is a perspective view of a conventional inkjet printer, which is also used to illustrate an external structure of an inkjet printer according to a first preferred embodiment of the present invention;

FIG. 2 is a perspective view of an ink tank of a conventional ink jet printer;

FIG. 3 is a schematic cross-sectional view of the ink cartridge of FIG. 2 taken along line A-A;

FIG. 4 is a schematic side view of an ink tank of an ink jet printer according to a first preferred embodiment of the present invention;

FIG. 5 is a schematic perspective view of an ink cartridge of the ink tank of FIG. 4;

FIG. 6 is a schematic cross-sectional view of the ink cartridge of FIG. 5 taken along line B-B;

FIG. 7 is a schematic side view of an ink tank of an ink jet printer according to a second preferred embodiment of the present invention; and

fig. 8 is a schematic side view of an ink tank of an ink jet printer according to a third preferred embodiment of the present invention.

Description of reference numerals:

1/100: ink-jet printer

2/102: printer body

3/103: frame part

9/109: recording unit

10/110/210/310: ink tank

19/119: resin frame

20/120/220/320: ink filling tube

30/130/230/330: ink tank body

31/131/231/331: ink storage chamber

32/132/232/332: ink injection port

33/133/233/333: ink injection part

35/135/235/335: ink supply part

36/136/236/336: atmosphere communicating part

37/137/237/337: atmosphere communication port

39/139: film coating

21/121/221/321: body part

23/123/223/323: first end

24/124/224/324: second end

40/140/240/340: first flow path pipe

41/141: first opening

42/142/242/342: second opening

43/143 first flow path

50/150/250/350 second flow path pipe

51/151/251/351: third opening

52/152/252/352: the fourth opening

53/153: second flow path

122/222/322: mounting part

181/281/381: bottom wall

182/282/382: flow guiding part

183/283/383: side wall

184/284/384: first end wall

185/285/385: second end wall

386: inclined plane

P1/P2/P3: horizontal plane

L: longitudinal direction

d1/d2/d 3: the shortest distance between the second opening and the bottom wall

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that embodiments of the invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring embodiments of the present invention.

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings. It is to be understood that the terms "upper", "lower", and the like are used herein for purposes of illustration only and are not to be construed as limiting.

Ordinal words such as "first" and "second" are referred to herein merely as labels, and do not have any other meaning, e.g., a particular order, etc. Also, for example, the term "first component" does not itself imply the presence of "second component", and the term "second component" does not itself imply the presence of "first component".

An ink jet printer according to a preferred embodiment of the present invention will be described in detail below. The ink jet printer according to the present invention has substantially the same configuration as the ink jet printer 1 according to the background art. Ink jet printer in addition to having the printing function, can also have various functions such as image scanner function, facsimile function, copying function. As for the printing function, a double-sided image recording function of recording images on both sides of the recording medium may be provided. Of course, the function other than the printing function is arbitrary.

First embodiment

Fig. 1 and 4 to 6 schematically show an ink tank 110 and an inkjet printer 100 having the same according to a first embodiment of the present invention.

As shown in fig. 1, the inkjet printer 100 includes a printer body 102 and an ink tank 110.

The printer body 102 is substantially rectangular parallelepiped in shape. The printer body 102 is provided with a paper feed cassette for feeding a recording medium and a paper discharge cassette for discharging the recording medium. The printer body 102 is also provided with a recording portion 109 including a plurality of nozzles, for example, and the recording portion 109 can eject ink onto a recording medium. An operation panel on which a display unit for displaying various information and setting contents and operation keys for performing various operations or inputting setting contents are arranged may be further provided on the upper surface of the printer body 102. In some embodiments, the display unit may not be provided, and only some of the operation keys may be provided, and these operation keys may be provided at appropriate positions of the printer body 102, for example, on the front surface.

The ink jet printer 100 preferably includes 4 ink tanks 110, wherein one ink tank 110 is provided at the left front portion of the printer body 102, which is generally used to contain black ink, and the other three ink tanks 110 are provided at the right front portion of the printer body 102, which are used to contain three color inks of cyan, magenta, and yellow, respectively, from left to right, so that the ink jet printer 100 can record a color image using four color inks of black, cyan, magenta, and yellow. Of course, it is understood that other numbers of ink tanks 110 may be provided, and that the ink tanks 110 may be provided at other locations of the printer body 102, as desired. Further, the ink tanks 110 may be fixedly mounted to the printer body 102, or may be configured to be detachably mounted to the printer body 102, as the actual need arises.

The ink tank 110 according to the first embodiment has substantially the same configuration as the ink tank 10 according to the background art, wherein structures having similar functions are given similar reference numerals.

As shown in fig. 4, the ink tank 110 mainly includes an ink tank body 130 and an ink cartridge 120, and the ink cartridge 120 is detachably connected to the ink tank body 130. The ink tank body 130 mainly includes an ink reservoir 131, an ink injection port 132, an ink injection portion 133, an ink supply portion 135, an atmosphere communication portion 136, and an atmosphere communication port 137. The inkjet printer 100 may further include an atmosphere communication pipe (not shown). An opening at one end of the atmosphere communication tube is connected to the atmosphere communication portion 136, and an opening at the other end of the atmosphere communication tube is provided in the vicinity of the ink filling portion 133. The large air communication portion 136 communicates with the outside of the ink tank body 130 through an opening of the other end of the large air communication pipe. The ink tank body 130 may be constituted by two parts of the resin frame 119 and the cover film 139. The ink storage chamber 131 is for containing ink to be supplied to the recording section 109, and the ink injection port 132 communicates with the ink storage chamber 131. In the present embodiment, the ink injection port 132 is located on the upper surface of the ink injection portion 133. The ink tank body 130 according to the first embodiment has substantially the same structure as the ink tank body 30 according to the background art, and for the sake of brevity, description thereof will be omitted.

As shown in fig. 5 and 6, the ink cartridge 120 has a body portion 121 extending in the longitudinal direction L. The body portion 121 has a first end 123 and a second end 124 opposite the first end 123 in the longitudinal direction L. In the present embodiment, the longitudinal direction L is disposed in the vertical direction, and the first end 123 is disposed above the second end 124. Specifically, first end 123 may be defined as the uppermost end of ink cartridge 120, and second end 124 may be defined as the lowermost end of ink cartridge 120.

The body portion 121 mainly includes a first flow path tube 140 and a second flow path tube 150. In the present embodiment, the first flow path pipe 140 and the second flow path pipe 150 are arranged side by side, and the second flow path pipe 150 is arranged at an upper position of the first flow path pipe 140. The first flow path pipe 140 may be a liquid flow path pipe, and the second flow path pipe 150 may be a gas flow path pipe. Preferably, the first and second

flow path tubes

140 and 150 are integrally formed. Of course, the first flow path pipe 140 and the second flow path pipe 150 may be provided separately as necessary.

The first flow path pipe 140 extends in the longitudinal direction L, and has a first opening 141, a second opening 142, and a first flow path 143 formed between the first opening 141 and the second opening 142, the distance from the first opening 141 to the first end 123 being smaller than the distance from the second opening 142 to the first end 123. Specifically, the first flow path 143 may extend substantially in the longitudinal direction L, and the first opening 141 is located at an upper surface of the first flow path pipe 140 and the second opening 142 is located at a lower surface of the first flow path pipe 140. In the present embodiment, the plane in which the second opening 142 is located is parallel to a horizontal plane, for example, parallel to the horizontal plane P1 shown in fig. 4.

The second flow path tube 150 extends in the longitudinal direction L, and has a third opening 151, a fourth opening 152, and a second flow path 153 formed between the third opening 151 and the fourth opening 152, the third opening 151 being located at a distance from the first end 123 smaller than the fourth opening 152, and the fourth opening 152 being located at a distance from the first end 123 smaller than the second opening 142, and the first end 123. Specifically, the second flow path 153 may extend substantially in the longitudinal direction L, and the third opening 151 is located at an upper surface of the second flow path pipe 150, the fourth opening 152 is located at a lower surface of the second flow path pipe 150, and the height of the fourth opening 152 is higher than the height of the second opening 142.

As shown in fig. 4 and 5, the ink cartridge 120 further includes a mounting portion 122 integrally formed with the body portion 121, and the ink cartridge 120 is fixed to the ink tank body 130 through the mounting portion 122. The mounting portion 122 is provided outside the body portion 121, and may be configured as a snap structure to be snapped to the ink tank body 130. Fig. 4 and 5 exemplarily show two mounting parts 122, and the two mounting parts 122 are disposed at the same height position of the body part 121 and are disposed at a predetermined distance apart. It will be understood by those skilled in the art that the number of the mounting portions 122 is not limited to the present embodiment, and the number of the mounting portions 122 may be one or more than two, for example, three, as required. As shown in fig. 4 and 6, the ink feed barrel 120 extends through the ink feed port 132 such that the first end 123 of the body portion 121 is located above the ink feed port 132, the second end 124 of the body portion 121 enters the ink reservoir 131, and the mounting portion 122 extends into the ink reservoir 131 and snaps to the ink tank body 130. Therefore, the first opening 141 and the third opening 151 are both located outside the reservoir 131, the first flow path 143 communicates with the reservoir 131 via the second opening 142, the second flow path 153 communicates with the reservoir 131 via the fourth opening 152, the second opening 142 faces the bottom wall and is spaced apart from the bottom wall, and the shortest distance d1 between the second opening 142 and the bottom wall is less than or equal to 2.5 mm.

The ink reservoir 131 has a bottom wall 181, an upper surface of the bottom wall 181 includes a flow guide 182 inclined with respect to a horizontal direction, a projection of the second opening 142 on a horizontal plane P1 is at least partially within a projection of the flow guide 182 on a horizontal plane P1, and an angle α 1 of the flow guide 182 to the horizontal plane is greater than or equal to 2.4 °. Optionally, the angle α 1 of the flow guide 182 to the horizontal plane P1 is greater than or equal to 3 °. In the present embodiment, the projection of the second opening 142 on the horizontal plane P1 is entirely located within the projection of the flow guide 182 on the horizontal plane P1. Thus, the flow guide part 182 can guide the ink to prevent the ink from staying between the second opening 142 and the flow guide part 182 when the ink is injected.

The ink storage chamber 131 has a side wall 183, a first end wall 184 and a second end wall 185 connected to the bottom wall 181, respectively, the first end wall 184 and the second end wall 185 are connected to the side wall 183 and disposed on both sides of the side wall 183, the ink cartridges 120 are spaced between the first end wall 184 and the second end wall 185, and the distance between the ink cartridges 120 and the first end wall 184 is smaller than the distance between the ink cartridges 120 and the second end wall 185. Preferably, the flow guide 182 is configured to extend obliquely downward in a direction from the first end wall 184 toward the second end wall 185. That is, the ink cartridge 120 is disposed at the front of the ink tank body 130, and the guide part 182 is configured to extend obliquely downward in a rearward direction, whereby the ink injected through the ink cartridge 120 can flow downward from a higher position to a lower position of the guide part 182 without staying between the second opening 142 and the guide part 182. In the present embodiment, the flow guide 182 is connected to the first end wall 184 and spaced apart from the second end wall 185. Of course, the flow guide 182 may be connected to the second end wall 185 as desired.

Second embodiment

Fig. 7 schematically shows an ink tank 210 of an ink jet printer according to a second embodiment of the present invention. The ink tank 210 according to the second embodiment has substantially the same configuration as the ink tank 110 according to the first embodiment, wherein structures having similar functions are given similar reference numerals.

As shown in fig. 7, the ink tank 210 also mainly includes an ink tank body 230 and an ink filling cylinder 220, and the ink filling cylinder 220 is detachably connected to the ink tank body 230. The ink tank body 230 also mainly includes an ink reservoir 231, an ink injection port 232, an ink injection portion 233, an ink supply portion 235, an atmosphere communication portion 236, an atmosphere communication port 237, and a cover film (not shown). The ink reservoir 231 also has a bottom wall 281 and side walls 283, a first end wall 284 and a second end wall 285 which are connected to the bottom wall 281, respectively. The upper surface of the bottom wall 281 also comprises a deflector 282 inclined with respect to the horizontal. The ink cartridge 220 also includes a body portion 221 and a mounting portion 222, the body portion 221 also having a first end 223 and a second end 224 opposite the first end 223 in the longitudinal direction L. The body portion 221 also mainly includes the first flow path tube 140 and the second flow path tube 150. For the sake of brevity, no further description is provided.

In the present embodiment, the shortest distance d2 between the second opening 242 of the first flow path tube 240 and the bottom wall 281 is less than or equal to 2.5mm, and the projection of the second opening 242 on the horizontal plane P2 is entirely located within the projection of the deflector 282 on the horizontal plane P2. The angle α 2 of the flow guide 282 to the horizontal plane P2 is greater than or equal to 2.4 °.

Unlike the first embodiment, the plane in which the second opening 242 lies is inclined from the horizontal plane P2 and is configured to extend obliquely downward in a direction from the first end wall 284 toward the second end wall 285. Preferably, the plane of the second opening 242 is parallel to the flow guide 282.

Third embodiment

Fig. 8 schematically shows an ink tank 310 of an ink jet printer according to a third embodiment of the present invention. The ink tank 310 according to the third embodiment has substantially the same configuration as the ink tank 110 according to the first embodiment, wherein structures having similar functions are given similar reference numerals.

As shown in fig. 8, the ink tank 310 also mainly includes an ink tank body 330 and an ink filling cylinder 320, and the ink filling cylinder 320 is detachably connected to the ink tank body 330. The ink tank body 330 also mainly includes an ink reservoir 331, an ink injection port 332, an ink injection portion 333, an ink supply portion 335, an atmosphere communication portion 336, an atmosphere communication port 337, and a coating film (not shown). The ink reservoir 331 also has a bottom wall 381, and a side wall 383, a first end wall 384 and a second end wall 385 respectively connected to the bottom wall 381. The upper surface of the bottom wall 381 also includes a flow guide 382 inclined with respect to the horizontal. Ink cartridge 320 also includes a body portion 321 and a mounting portion 322, body portion 321 also having a first end 323 and a second end 324 opposite first end 323 along longitudinal direction L. The body portion 321 also mainly includes a first flow path tube 340 and a second flow path tube 350. For the sake of brevity, no further description is provided.

In the present embodiment, the shortest distance d3 between the second opening 342 of the first flow path tube 340 and the bottom wall 381 is less than or equal to 2.5mm, and the projection of the second opening 342 on the horizontal plane P3 is partially located within the projection of the deflector 382 on the horizontal plane P3. The angle α 3 of the flow guide 382 to the horizontal plane P3 is greater than or equal to 2.4 °.

Unlike the first embodiment, in the present embodiment, the upper surface of the bottom wall 381 includes an inclined surface 386, the inclined surface 386 is located between the inner surface of the first end wall 384 and the flow guide portion 382, and an angle α 3 of the flow guide portion 382 to the horizontal plane P3 is greater than an angle α 4 of the inclined surface to the horizontal plane P3.

According to the utility model discloses an ink jet printer, the upper surface through the diapire with the ink storage chamber of china ink jar is provided with the water conservancy diversion portion for the horizontal direction slope to make the projection of second opening on the horizontal plane at least partially be located the projection of water conservancy diversion portion on this horizontal plane, the water conservancy diversion portion can play the effect of water conservancy diversion to the ink, in order to avoid ink to stop between second opening and water conservancy diversion portion when annotating the ink, thereby can reduce the possibility of forming meniscus at the second opening part at the in-process of annotating the ink, in order to avoid the phenomenon of ink supply in-process temporary stop.

Unless defined otherwise, technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Terms such as "component" and the like, when used herein, can refer to either a single part or a combination of parts. Terms such as "mounted," "disposed," and the like, as used herein, may refer to one component as being directly attached to another component or one component as being attached to another component through intervening components. Features described herein in one embodiment may be applied to another embodiment, either alone or in combination with other features, unless the feature is otherwise inapplicable or otherwise stated in the other embodiment.

The present invention has been described in terms of the above embodiments, but it is to be understood that the above embodiments are for purposes of illustration and description only and are not intended to limit the invention to the described embodiments. Furthermore, it will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that many more modifications and variations can be made in accordance with the teachings of the present invention, all of which fall within the scope of the invention as claimed.

Claims

1. An ink tank for an ink jet printer including a recording portion, characterized by comprising:

an ink tank body, the ink tank body comprising:

an ink injection port in communication with the ink reservoir; and

2. The ink tank as claimed in claim 1, wherein an angle of the flow guide portion to the horizontal plane is greater than or equal to 3 °.

3. The ink tank as claimed in claim 1, wherein the ink reservoir chamber has a side wall, a first end wall and a second end wall connected to the bottom wall, respectively, the first end wall and the second end wall being connected to the side wall and disposed on both sides of the side wall, the ink feed cylinder being disposed at an interval between the first end wall and the second end wall, and a distance between the ink feed cylinder and the first end wall being smaller than a distance between the ink feed cylinder and the second end wall.

4. The ink tank according to claim 3, wherein the flow guide portion is configured to extend obliquely downward in a direction from the first end wall toward the second end wall.

5. The ink tank as claimed in claim 4, wherein said flow guide portion is connected to said first end wall.

6. The ink tank as claimed in claim 3, wherein a plane in which the second opening is located is parallel to the horizontal plane.

7. The ink tank as claimed in claim 3, wherein a plane in which the second opening is located is inclined from the horizontal plane and is configured to extend obliquely downward in a direction from the first end wall toward the second end wall.

8. The ink tank as claimed in claim 7, wherein a plane in which the second opening is located is parallel to the flow guide portion.

9. The ink tank as in claim 3, wherein an upper surface of the bottom wall includes an inclined surface between an inner surface of the first end wall and the flow guide portion, the flow guide portion having a greater angle with the horizontal than the inclined surface.

10. An ink jet printer characterized by comprising a recording portion and the ink tank according to any one of claims 1 to 9.