CN110481163B - Liquid ejecting apparatus - Google Patents
Liquid ejecting apparatus Download PDFInfo
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- CN110481163B CN110481163B CN201910388178.0A CN201910388178A CN110481163B CN 110481163 B CN110481163 B CN 110481163B CN 201910388178 A CN201910388178 A CN 201910388178A CN 110481163 B CN110481163 B CN 110481163B
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- Prior art keywords
- liquid
- nozzle
- height
- housing
- waste liquid
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/18—Ink recirculation systems
- B41J2/185—Ink-collectors; Ink-catchers
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B41—PRINTING; LINING MACHINES; TYPEWRITERS; STAMPS
- B41J—TYPEWRITERS; SELECTIVE PRINTING MECHANISMS, i.e. MECHANISMS PRINTING OTHERWISE THAN FROM A FORME; CORRECTION OF TYPOGRAPHICAL ERRORS
- B41J2/00—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed
- B41J2/005—Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed characterised by bringing liquid or particles selectively into contact with a printing material
- B41J2/01—Ink jet
- B41J2/17—Ink jet characterised by ink handling
- B41J2/18—Ink recirculation systems
- B41J2/185—Ink-collectors; Ink-catchers
- B41J2002/1856—Ink-collectors; Ink-catchers waste ink containers
Abstract
The invention provides a liquid ejecting apparatus which can reduce the possibility of continuous leakage of liquid from a nozzle when a meniscus of the nozzle is broken in a state that a posture is inclined. The liquid ejecting apparatus includes: a liquid ejecting head (32) configured to eject, from a nozzle (31), liquid supplied from a liquid storage section (19) that stores liquid; a cap (42) configured to form a closed space of the nozzle opening; a waste liquid flow passage (43) having an upstream end connected to the cover; a suction mechanism (44) which is provided in the middle of the waste liquid flow path and is configured to suck liquid from the liquid ejecting head through the cap; and a case (20) which houses at least the liquid ejecting head, the cap, and the suction mechanism, wherein at least a part of the waste liquid flow path passes through a position higher than the height of the first liquid surface (L1) in the liquid housing section while the case is tilted from a state in which the height of the first liquid surface is lower than the nozzle to a predetermined angle at which the height of the first liquid surface is higher than the nozzle.
Description
Technical Field
The present invention relates to a liquid ejecting apparatus such as a printer.
Background
As one example of the liquid ejecting apparatus, there is a recording apparatus described in patent document 1, for example. The recording apparatus ejects ink as one example of a liquid supplied from an ink cartridge as one example of a liquid containing portion from nozzles and performs recording on recording paper.
In a recording apparatus that supplies ink by a water head, for example, when a meniscus of a nozzle is broken in a state where a liquid surface of the ink in an ink cartridge is inclined so as to be located at a higher position than the nozzle, there is a possibility that the ink may continuously leak from the nozzle.
Such a problem may occur not only in a recording apparatus that ejects ink supplied from an ink cartridge from nozzles, but also in a liquid ejecting apparatus that ejects liquid supplied from a liquid storage portion from nozzles.
Patent document 1: japanese patent laid-open publication No. 2017-177761
Disclosure of Invention
An object of the present invention is to provide a liquid ejecting apparatus capable of reducing the possibility of liquid leaking from a nozzle continuously when a meniscus of the nozzle is broken in a state in which an attitude is inclined.
A liquid ejecting apparatus according to an aspect of the present invention includes: a liquid ejecting head configured to eject the liquid supplied from a liquid accommodating portion accommodating the liquid from a nozzle; a cap configured to form a closed space in which the nozzle opening is formed; a waste liquid flow passage, an upstream end of which is connected to the cover; a suction mechanism provided in the middle of the waste liquid flow path and configured to suck the liquid from the liquid ejecting head through the cap; and a housing that houses at least the liquid ejecting head, the cap, and the suction mechanism, wherein at least a part of the waste liquid channel passes through a position higher than a height of the liquid surface while the housing is tilted from a state in which the height of the liquid surface in the liquid housing portion is lower than the nozzle to a predetermined angle that is higher than the nozzle.
Drawings
Fig. 1 is a perspective view of a multifunction device including a liquid ejecting apparatus according to an embodiment.
Fig. 2 is a schematic front view of the multifunction device with a part of the case omitted.
Fig. 3 is a schematic diagram showing an internal structure in the liquid ejecting apparatus in the use posture.
Fig. 4 is a schematic diagram showing an internal structure in the liquid ejecting apparatus in an inclined posture.
Fig. 5 is a schematic view of a usage posture of the liquid ejection device of the first modification.
Fig. 6 is a schematic view of the inclined posture of the liquid ejection device of the first modification.
Fig. 7 is a schematic view of a usage posture of the liquid ejection device of the second modification.
Fig. 8 is a schematic view of the inclined posture of the liquid ejection device of the second modification.
Fig. 9 is a schematic view of a liquid containing section according to a third modification.
Fig. 10 is a schematic view of a liquid containing section according to a fourth modification.
Detailed Description
Hereinafter, an embodiment of a liquid ejecting apparatus will be described with reference to the drawings. The liquid ejecting apparatus according to the present embodiment is an ink jet printer that prints characters, images, and the like on a medium by ejecting ink, which is one example of a liquid, onto the medium such as paper.
As shown in fig. 1, the multifunction device 11 includes a liquid ejecting apparatus 12 and an image reading apparatus 13 disposed on the liquid ejecting apparatus 12, and has a substantially rectangular parallelepiped shape as a whole. In fig. 1, as an orientation in which the multifunction peripheral 11 is placed on a horizontal plane in a use posture a suitable for use, a direction of gravity is represented by a Z axis, and a direction along the horizontal plane perpendicular to the direction of gravity is represented by an X axis and a Y axis. The X, Y and Z axes are mutually orthogonal. In the following description, a direction along the X axis is also referred to as a width direction X, a direction along the Y axis is referred to as a depth direction Y, and a direction along the Z axis is also referred to as a height direction Z.
The liquid ejecting apparatus 12 includes an operation panel 17, and the operation panel 17 includes an operation unit 15 and a display unit 16. The operation unit 15 is configured by buttons and the like for performing various operations of the multifunction printer 11. The display unit 16 displays information of the liquid ejecting apparatus 12, the multifunction device 11, and the like.
The liquid ejecting apparatus 12 includes at least one liquid storage unit 19 that stores liquid, and a case 20 that stores the liquid storage unit 19. A window 21 is formed in the case 20, and the window 21 exposes a part of the liquid storage 19 to the outside. The housing 20 of the present embodiment houses five liquid housing portions 19, and five window portions 21 are formed corresponding to the liquid housing portions 19.
Next, the liquid storage section 19 will be described.
As shown in fig. 2, the liquid containing section 19 has a containing chamber 23 capable of containing liquid. The storage chambers 23 store different kinds of liquids. Examples of the liquid include cyan, magenta, yellow, and black colors, and colorants such as pigments and dyes. The liquid ejecting apparatus 12 may include a plurality of types of liquid storage units 19 having different storage amounts.
The liquid storage section 19 has an injection section 24 capable of injecting liquid into the storage chamber 23. The liquid storage 19 is made of transparent or translucent resin, and the level of the first liquid level L1 shown in fig. 3 of the liquid stored in the storage chamber 23 can be visually checked from the outside.
As shown in fig. 3, in the liquid storage portion 19, a region corresponding to the window portion 21 of the housing 20 functions as a visual confirmation surface 26 that enables the ink in the storage chamber 23 to be visually confirmed from the outside. The visual confirmation surface 26 is provided with a lower limit scale 27 indicating a reference for supplying the liquid to the storage chamber 23, and an upper limit scale 28 indicating a reference for an upper limit of the liquid that can be stored in the storage chamber 23. The height of the upper limit scale 28 matches the height of the first liquid level L1 in a state where the liquid storage section 19 in the use posture a stores the largest amount of liquid. A communication hole 23b for communicating the housing chamber 23 with the outside is formed in the upper wall 23a of the housing chamber 23. That is, the housing chamber 23 is configured to communicate with the atmosphere.
Next, the internal structure of the liquid ejecting apparatus 12 will be described.
As shown in fig. 3, the liquid ejecting apparatus 12 includes a liquid ejecting head 32 and a carriage 33, the liquid ejecting head 32 being capable of ejecting liquid from a plurality of nozzles 31 opening on a nozzle formation surface 30, and the carriage 33 being capable of holding the liquid ejecting head 32 and reciprocating in a scanning direction of a width direction X. The liquid ejecting head 32 ejects the liquid supplied from the liquid containing section 19, and performs printing on a medium not shown.
The liquid ejecting apparatus 12 includes a liquid supply unit 35 that supplies the liquid stored in the liquid storage unit 19 to the nozzle 31, and a maintenance unit 36 that maintains the liquid ejecting head 32. The case 20 houses the liquid ejecting head 32, the carriage 33, the liquid supply unit 35, and the maintenance unit 36.
Although a plurality of liquid supply portions 35 are provided corresponding to the liquid storage portions 19, one liquid storage portion 19 and one liquid supply portion 35 corresponding to the liquid storage portion 19 are illustrated in fig. 3 for simplification of the drawing. The liquid supply unit 35 includes: a liquid supply path 38 that supplies the liquid stored in the liquid storage portion 19 to the nozzle 31; an intermediate reservoir 39, the intermediate reservoir 39 being provided in the liquid supply channel 38 and being capable of storing liquid; and a filter 40, wherein the filter 40 can collect foreign matters such as air bubbles.
The maintenance unit 36 includes: a cap 42, the cap 42 covering the nozzle 31; a waste liquid flow path 43 whose upstream end is connected to the cap 42; and a suction mechanism 44, wherein the suction mechanism 44 is provided in the middle of the waste liquid channel 43. The maintenance unit 36 includes a waste liquid storage unit 46, the waste liquid storage unit 46 being configured to introduce the liquid discharged from the waste liquid channel 43 from the inlet port 45, and a guide unit 47, the guide unit 47 being configured to guide the waste liquid channel 43. The downstream end of the waste liquid flow path 43 is connected to the introduction port 45. In the use posture a, the inlet 45 is located at a higher position than the nozzle 31. The guide portion 47 guides the waste liquid flow path 43 formed of, for example, a flexible tube.
The cap 42 is provided so as to be movable between a position shown in fig. 3 where it contacts the liquid ejecting head 32 and a position not shown where it is separated from the liquid ejecting head 32. The cap 42 is in contact with the liquid ejecting head 32 to cap the liquid ejecting head 32, and forms a closed space in which the nozzles 31 are opened between the nozzle forming surface 30 and the cap. The cap 42 caps the liquid ejecting head 32 during standby when the liquid ejecting head 32 is not performing printing on a medium, thereby suppressing drying of the nozzles 31.
The suction mechanism 44 is configured to suck the liquid from the liquid ejecting head 32 through the cap 42. That is, the maintenance unit 36 drives the suction mechanism 44 in a state where the liquid ejecting head 32 is capped, and reduces the pressure in the closed space formed between the cap 42 and the nozzle forming surface 30. Therefore, the maintenance unit 36 discharges foreign substances such as bubbles in the liquid ejecting head 32 and the like from the nozzles 31 together with the liquid. The liquid discharged from the nozzle 31 is received by the cap 42, and is received in the waste liquid receiving portion 46 via the waste liquid flow path 43.
The upstream side of the suction means 44 in the waste liquid flow path 43 is defined as an upstream flow path 43a, and the downstream side of the suction means 44 is defined as a downstream flow path 43 b. The upstream flow path 43a and the downstream flow path 43b communicate with each other during standby in order to suppress a variation in pressure in the cover 42 caused by a change in ambient temperature. The waste liquid channel 43 has a folded portion 43c that folds a part of the downstream channel 43 b. The folded portion 43c is a portion that bends the waste liquid channel 43 at an acute angle.
Next, the posture of the liquid ejecting apparatus 12 will be explained.
As shown in fig. 3, the use posture a means a state in which the housing 20 is placed on a horizontal plane. In the usage posture a, the nozzle formation surface 30 is positioned at the lower end of the liquid ejecting head 32 and is horizontal, and the liquid ejecting head 32 ejects the liquid in the direction of gravity.
In the use posture a, the height of the first liquid level L1 in the liquid containing section 19 is lower than that of the nozzle 31. That is, at least a part of the visual confirmation surface 26 of the liquid storage section 19, the upper limit scale 28, and the lower limit scale 27 in the use posture a are located at positions lower than the nozzle 31. In the use posture a, the openings of the upper wall 23a and the communication hole 23b in the housing chamber 23 may be located at a lower position than the nozzle 31. In the usage posture a, the liquid ejecting head 32 is positioned between the liquid containing section 19 and the waste liquid containing section 46 in the depth direction Y.
As shown in fig. 4, the tilt posture of the housing 20 is set to the tilt posture B of the liquid ejecting apparatus 12 so that the front side on which the liquid containing section 19 is arranged is higher than the rear side on which the waste liquid containing section 46 is arranged. In the tilted posture B, the height of the first liquid level L1 is higher than the at least one nozzle 31. In fig. 4, a posture in which the housing 20 is inclined by 30 degrees as one example of a predetermined angle from the use posture a is illustrated. When the first liquid level L1 and the upper limit scale 28 are at the same height in the use posture a, the first liquid level L1 in the tilted posture B is equal to or less than the height of the upper limit scale 28. Thereby, the upper limit scale 28 is located at a higher position than the nozzle 31. In the inclined posture B of the present embodiment, the opening of the upper wall 23a and the communication hole 23B in the housing chamber 23, the visual confirmation surface 26, and the lower limit scale 27 are located at a position higher than the nozzle 31.
When the liquid ejecting apparatus 12 is in the tilted posture B, at least a part of the waste liquid channel 43 is located at a position higher than the first liquid level L1. In the present embodiment, when the liquid ejecting apparatus 12 is tilted in the tilted posture B in a state where the liquid containing portion 19 contains the maximum amount of liquid, a portion located at a position higher than the first liquid level L1 of the waste liquid channel 43 is set as the high position portion 43 d. The folded-back portion 43c is located at the high portion 43 d.
In other words, the high portion 43d provided on the downstream side of the suction mechanism 44 passes through a position higher than the height of the first liquid level L1 in the storage chamber 23 while the housing 20 is tilted from the use posture a to 30 degrees of the tilted posture B. The guide portion 47 guides the waste liquid channel 43 so that the folded portion 43c is positioned higher than the first liquid level L1 of the liquid storage portion 19 until the housing 20 is tilted up to 30 degrees.
In the use posture a and the tilted posture B, the high portion 43d is located at a position higher than the first liquid level L1. Thus, when the casing 20 is tilted to a predetermined angle so that any one of the first liquid level L1, the lower limit scale 27, and the upper limit scale 28 has the same height as the nozzle 31, the high portion 43d is located at a higher position than the first liquid level L1.
The waste liquid storage portion 46 is provided at a position lower than the liquid ejecting head 32 when the liquid ejecting apparatus 12 is in the tilted posture B. In the tilted posture B, the introduction port 45 is located at a position lower than the height of the first liquid level L1.
The operation of the present embodiment will be described.
As shown in fig. 3, in the use posture a in which the first liquid level L1 is located at a lower position than the nozzle 31, when the liquid is ejected or discharged from the nozzle 31, the negative pressure in the liquid ejecting head 32 becomes large. The liquid in the liquid storage section 19 is sucked into the liquid ejecting head 32 by the negative pressure, and the consumed amount of liquid is replenished from the liquid storage section 19.
As shown in fig. 4, when the posture of the liquid ejecting apparatus 12 is changed from the use posture a to the inclined posture B, the first liquid surface L1 is located at a position higher than the nozzle 31, and the liquid in the liquid storage 19 is supplied to the liquid ejecting head 32 by the water head. Thus, for example, when vibration is applied to the liquid ejecting apparatus 12 to break the meniscus of the nozzle 31, the liquid supplied from the liquid storage section 19 to the liquid ejecting head 32 may leak from the nozzle 31. The liquid leaking from the nozzle 31 is received in the cap 42 and flows into the waste liquid flow path 43.
Even in the tilted posture B, the high portion 43d is located at a position higher than the first liquid level L1. Thus, the liquid in the waste liquid channel 43 stops flowing at a position where the height of the second liquid level L2 in the waste liquid channel 43 is flush with the height of the first liquid level L1 in the storage chamber 23. In the tilted posture B, the folded back portion 43c is located at a position higher than the first liquid level L1. The liquid flowing through the waste liquid flow path 43 stops flowing in a state where the second liquid level L2 is located on the upstream side of the folded portion 43 c. When the flow of the liquid in the waste liquid channel 43 is stopped, the leakage of the liquid from the nozzle 31 is also stopped.
In the state where the housing 20 is tilted to the tilted posture B, the introduction port 45 is located at a position lower than the height of the first liquid level L1. Thus, for example, when the second liquid level L2 swings and the liquid passes over the high portion 43d, the passed liquid is stored in the waste liquid storage portion 46.
The effects of the present embodiment will be described.
(1) The high portion 43d passes through a position higher than the height of the first liquid level L1 in the liquid containing portion 19 until the casing 20 is tilted to a predetermined angle. Therefore, even when the liquid leaks from the nozzle 31 in a state where the housing 20 is inclined, the liquid leaking from the nozzle 31 can be stored in the waste liquid channel 43. Therefore, it is possible to reduce the possibility that the liquid continuously leaks from the nozzle 31 when the meniscus of the nozzle 31 is broken in a state where the liquid ejecting apparatus 12 is tilted.
(2) During the period until the casing 20 is tilted to the predetermined angle, the high portion 43d passes through a position higher than the height of the first liquid level L1 in the liquid containing section 19 containing the largest amount of liquid. Therefore, even when the liquid ejecting apparatus 12 is tilted in a state where the maximum amount of liquid is stored in the liquid storage portion 19, the possibility that the liquid continuously leaks from the nozzle 31 can be reduced.
(3) While the housing 20 is tilted to the predetermined angle, the high portion 43d of the downstream flow path 43b of the waste liquid flow path 43 on the downstream side of the suction mechanism 44 passes through a position higher than the first liquid level L1 in the liquid containing portion 19. Therefore, the length of the waste liquid flow path 43 on the upstream side of the suction mechanism 44 can be maintained, and a decrease in the suction capability of the suction mechanism 44 to suck the liquid from the liquid ejecting head 32 can be suppressed.
(4) The inlet 45 configured to introduce the liquid into the waste liquid storage portion 46 is located at a position lower than the height of the first liquid level L1 in the liquid storage portion 19 in a state where the case 20 is tilted. Therefore, for example, even when the liquid leaking from the nozzle 31 cannot be stopped in the waste liquid channel 43, the liquid can be stored in the liquid storage portion 19.
(5) When the housing chamber 23 is open to the atmosphere, the first liquid level L1 in the housing chamber 23 is pressurized to a high pressure. Therefore, when the first liquid level L1 in the storage chamber 23 is located at a higher position than the nozzle 31, the liquid is likely to leak from the nozzle 31. In this regard, at least a part of the waste liquid flow path 43 passes through a position higher than the height of the first liquid level L1 in the housing chamber 23 while the housing 20 is tilted to a predetermined angle. Therefore, even when the housing chamber 23 is configured to communicate with the atmosphere, the possibility of continuous leakage of the liquid from the nozzle 31 can be reduced.
(6) For example, the maximum angle of inclination of the ramp or the maximum angle of inclination of the aircraft during takeoff is approximately 20 degrees, and the angle of inclination of the aircraft during hover is less than 30 degrees. Therefore, by setting the predetermined angle to 30 degrees with reference to the state where the casing 20 is placed on the horizontal plane, the possibility of the liquid continuing to leak can be reduced even when the casing 20 is tilted during transportation.
(7) Since the waste liquid channel 43 has the folded portion 43c, the length of the waste liquid channel 43 can be shortened as compared with a case where the waste liquid channel is wound around another member, for example. Since the liquid ejecting apparatus 12 includes the guide portion 47 configured to guide the fold back portion 43c, at least a part of the waste liquid channel 43 can be easily held at a position higher than the height of the first liquid level L1.
This embodiment can be modified and implemented as follows. The present embodiment and the following modifications can be combined with each other within a range not technically contradictory.
First modification example
As shown in fig. 5 and 6, the folded portion 43c and the raised portion 43d may be disposed between the liquid ejecting head 32 and the liquid containing portion 19 in the depth direction Y. The waste liquid channel 43 may be routed along the side surface of the liquid storage section 19. The guide portion 47 may guide the waste liquid channel 43 along the side surface of the liquid storage portion 19.
Second modification example
As shown in fig. 7 and 8, a folded portion 43c and a raised portion 43d may be provided in an upstream flow path 43a of the waste liquid flow path 43 on the upstream side of the suction mechanism 44. While the housing 20 is tilted from the use posture a to the tilted posture B, the high portion 43d of the upstream flow path 43a of the waste liquid flow path 43 may be passed through a position higher than the height of the first liquid level L1.
While the housing 20 is tilted to the predetermined angle, the high portion 43d of the upstream flow path 43a of the waste liquid flow path 43 on the upstream side of the suction mechanism 44 passes through a position higher than the first liquid level L1 in the liquid containing portion 19. Therefore, the waste liquid flow passage 43 can stop the flow of the liquid at a position close to the cap 42, so that the amount of the liquid leaking from the nozzle 31 can be reduced.
When the folded portion 43c and the high-position portion 43d are disposed between the liquid ejecting head 32 and the liquid containing portion 19, the height of the folded portion 43c and the height of the high-position portion 43d can be reduced as compared with a case where the folded portion 43c and the high-position portion 43d are disposed at positions that are farther from the liquid containing portion 19 than the liquid ejecting head 32. This can shorten the length of the waste liquid channel 43, and therefore, the liquid can be made less likely to remain in the waste liquid channel 43, as compared with the case where the length of the waste liquid channel 43 is long.
Third modification example
As shown in fig. 9, the liquid storage section 19 of the embodiment may be a flexible bag 50. The bag 50 as an example of the liquid storage portion may be stored in the case 51. The liquid contained in the bag 50 is guided out of the case 51 from the guiding portion 52. The space of the bag 50 in which the liquid is stored is not open to the atmosphere, and the bag 50 deforms as the amount of the stored liquid decreases. The liquid contained in the bag 50 is pressurized with a large air pressure through the bag 50. The bag 50 may be arranged such that the dimension in the height direction Z is smaller than the dimensions in the width direction X and the depth direction Y in the use posture a. The lead-out portion 52 may be located at the center of the bag 50 in the height direction Z. When the bag 50 contains liquid, the height of the lead-out portion 52 can be regarded as the height of the first liquid level L1.
Fourth modification example
As shown in fig. 10, the injection portion 24 may be provided on the front side of the nozzle 31 with respect to the center of the housing chamber 23 in the depth direction Y and may have a plurality of injection flow paths 54. The liquid is replenished to the liquid storage section 19 in the use posture a. The lower ends of the plurality of injection flow paths 54 of the injection portion 24 on the side of the storage chamber 23 are at the same height in the use posture a. For example, when a refill bottle 55 for storing liquid is connected to the injection portion 24, the plurality of injection flow paths 54 are divided into an inflow path for allowing the liquid in the refill bottle 55 to flow into the storage chamber 23 and an exhaust path for conveying air in the storage chamber 23 into the refill bottle 55. When the first liquid level L1 is located at the lower end of the air discharge passage, air is no longer supplied into the refill bottle 55, the pressure in the refill bottle 55 decreases, and the flow of liquid from the refill bottle 55 into the storage chamber 23 stops. Therefore, in this configuration, the height of the lower end of the plurality of injection flow paths 54 included in the injection portion 24 is the height of the first liquid level L1 in the state where the liquid storage portion 19 stores the largest amount of liquid. In this configuration, when the housing 20 is tilted to the tilted posture B so that the nozzle 31 is positioned at the same height as the lower limit scale 27, the high portion 43d is positioned higher than the lower end of the injection flow path 54. When the first liquid level L1 coincides with the height of the lower end of the injection flow path 54 in the use posture a, the first liquid level L1 in the inclined posture B is equal to or lower than the height of the lower end of the injection flow path 54. Therefore, the waste liquid channel 43 passes through a position higher than the height of the first liquid level L1, and the possibility of liquid continuously leaking from the nozzle 31 can be reduced in the case where the meniscus of the nozzle 31 is broken.
The liquid storage unit 19 may not include at least one of the lower limit scale 27 and the upper limit scale 28.
The housing 20 may not contain the liquid storage 19. The liquid storage 19 may be fixed or mounted to the outside of the housing 20.
The liquid storage unit 19 may be of an ink cartridge type that is attachable to and detachable from the liquid ejecting apparatus 12. The liquid storage unit 19 may be a temporary storage unit that temporarily stores the liquid supplied from the liquid supply source. The liquid ejecting apparatus 12 may include a mounting portion to which the ink cartridge type liquid storage portion 19 is detachably mounted. The waste liquid channel 43 may be provided along a side surface of the mounting portion or along a side surface of the liquid containing portion 19 mounted on the mounting portion. The guide portion 47 may also be provided on the side surface of the fitting portion.
The liquid ejecting apparatus 12 may not include the guide portion 47.
The liquid ejecting apparatus 12 may be provided with a mark indicating the arrangement of the waste liquid channel 43 in the housing 20, the liquid storage section 19, the waste liquid storage section 46, or the like. The liquid ejecting apparatus 12 may be provided with a mark indicating the arrangement of the high-level portion 43d or the folded portion 43 c. By providing the mark, the liquid ejecting apparatus 12 can be easily assembled and reliability can be improved.
The waste liquid channel 43 may not include the folded portion 43 c.
The angle of the inclined posture B with respect to the use posture a can be arbitrarily changed. For example, a state of being inclined by 10 degrees from the use posture a may be the inclined posture B, or a state of being inclined by 20 degrees from the use posture a may be the inclined posture B.
The liquid ejecting apparatus 12 may be configured without the waste liquid storage unit 46. The waste liquid storage 46 may be provided outside the housing 20.
The inlet 45 may be located at the same height as the first liquid level L1 in the tilted posture B. The introduction port 45 may be located higher than the first liquid level L1 in the tilted posture B.
The inlet 45 may be located at a position lower than the nozzle 31 in the use posture a.
In the tilted posture B, the entire waste liquid channel 43 may be located higher than the first liquid level L1.
The liquid ejecting apparatus 12 may be a liquid ejecting apparatus that ejects or discharges a liquid other than ink. The state of the liquid discharged from the liquid ejecting apparatus as a minute amount of liquid droplets includes a granular state, a tear-like state, and a state in which the tail is formed into a thread. The liquid referred to herein may be any material that can be ejected from the liquid ejecting apparatus. For example, the liquid may be a material in a state when the substance is in a liquid phase, and includes a fluid material such as a liquid with a relatively high or low viscosity, a colloidal solution, gel water, another inorganic solvent, an organic solvent, a solution, a liquid resin, or a liquid metal (molten metal). The liquid includes not only a liquid in one state of matter but also a state in which particles of a functional material composed of a solid material such as a pigment or metal particles are dissolved, dispersed, or mixed in a solvent. As a representative example of the liquid, the ink, the liquid crystal, and the like described in the above embodiments are given. The ink herein refers to an ink including various liquid compositions such as a general water-based ink, an oil-based ink, a gel-like ink, and a hot-melt ink. As a specific example of the liquid ejecting apparatus, there is an apparatus that ejects a liquid containing an electrode material or a color material used in manufacturing a liquid crystal Display, an EL (Electro Luminescence) Display, a surface light emitting Display (FED), or a color filter in a dispersed or dissolved form. The liquid ejecting apparatus may be an apparatus for ejecting a living organism used in the manufacture of a biochip, an apparatus used as a precision pipette for ejecting a liquid to be a sample, a printing apparatus, a micro-dispenser, or the like. The liquid ejecting apparatus may be an apparatus for ejecting lubricating oil to a precision machine such as a timepiece or a camera by accurate positioning, or an apparatus for ejecting transparent resin liquid such as ultraviolet curable resin to a substrate in order to form a minute hemispherical lens (optical lens) or the like used for an optical communication element or the like. The liquid ejecting apparatus may eject an acidic or alkaline etching liquid for etching a substrate or the like.
The technical ideas and the operational effects thereof grasped by the above-described embodiment and modified examples are described below.
[ idea 1]
A liquid ejecting apparatus is provided with:
a liquid ejecting head configured to eject the liquid supplied from a liquid storage unit that stores the liquid from a nozzle;
a cap configured to form a closed space in which the nozzle opening is formed;
a waste liquid flow passage, an upstream end of which is connected to the cover;
a suction mechanism provided in the middle of the waste liquid flow path and configured to suck the liquid from the liquid ejecting head through the cap;
a case that houses at least the liquid ejecting head, the cap, and the suction mechanism,
the housing is inclined from a state in which a liquid surface in the liquid storage portion is lower than the nozzle to a predetermined angle higher than the nozzle, and at least a part of the waste liquid flow passage passes through a position higher than the liquid surface.
According to this configuration, at least a part of the waste liquid flow path passes through a position higher than the height of the liquid surface in the liquid storage unit until the casing is tilted to the predetermined angle. Therefore, even when the liquid leaks from the nozzle in a state where the housing is inclined, the liquid leaking from the nozzle can be stored in the waste liquid channel. Therefore, when the meniscus of the nozzle is broken in a state where the liquid ejecting apparatus is tilted, the possibility that the liquid continuously leaks from the nozzle can be reduced.
[ idea 2]
The liquid ejecting apparatus according to [ idea 1], wherein the liquid ejecting apparatus,
in a state where the liquid storage section stores a maximum amount of the liquid, at least a part of the waste liquid flow passage passes through a position higher than the height of the liquid surface until the case is tilted to the predetermined angle.
According to this configuration, at least a part of the waste liquid flow path passes through a position higher than the height of the liquid surface in the liquid storage portion in which the maximum amount of liquid is stored until the casing is tilted to the predetermined angle. Therefore, even when the liquid ejecting apparatus is tilted in a state where the liquid storage portion stores the largest amount of liquid, the possibility that the liquid continuously leaks from the nozzle can be reduced.
[ idea 3]
The liquid ejecting apparatus according to [ idea 1] or [ idea 2], characterized in that,
at least a part of the waste liquid flow path on a downstream side of the suction mechanism passes through a position higher than the height of the liquid surface until the housing is tilted to the predetermined angle.
According to this configuration, at least a part of the waste liquid flow path on the downstream side of the suction mechanism passes through a position higher than the liquid surface in the liquid storage portion until the casing is tilted to the predetermined angle. Therefore, the length of the waste liquid flow path on the upstream side of the suction mechanism can be maintained, and a decrease in the suction capability of the suction mechanism for sucking the liquid from the liquid ejecting head can be suppressed.
[ idea 4]
The liquid ejecting apparatus according to [ idea 1] or [ idea 2], characterized in that,
at least a part of the waste liquid channel on an upstream side of the suction mechanism passes through a position higher than the height of the liquid surface until the housing is tilted to the predetermined angle.
According to this configuration, at least a part of the waste liquid flow path on the upstream side of the suction mechanism passes through a position higher than the liquid surface in the liquid storage portion until the casing is tilted to the predetermined angle. Therefore, the waste liquid channel can stop the flow of the liquid at a position close to the cap, and the amount of the liquid leaking from the nozzle can be reduced.
[ idea 5]
The liquid ejecting apparatus according to any one of [ idea 1] to [ idea 4], characterized in that,
further comprising a waste liquid housing section configured to introduce the liquid discharged from the waste liquid flow path from an inlet port,
the introduction port is located at a position lower than the height of the liquid surface in a state where the housing is tilted by the predetermined angle.
According to this configuration, the inlet for introducing the liquid into the waste liquid storage unit is located at a position lower than the height of the liquid surface in the liquid storage unit in a state where the casing is tilted. Therefore, for example, even when the liquid leaking from the nozzle does not stop in the waste liquid flow path, the liquid can be stored in the liquid storage portion.
[ idea 6]
The liquid ejecting apparatus according to any one of [ idea 1] to [ idea 5], characterized in that,
the liquid storage unit is configured such that a storage chamber for storing the liquid communicates with the atmosphere,
at least a part of the waste liquid flow path passes through a position higher than the height of the liquid surface in the storage chamber until the housing is tilted to the predetermined angle.
When the housing chamber is open to the atmosphere, the atmospheric pressure is applied to the liquid surface in the housing chamber. Therefore, when the liquid level in the storage chamber is located at a higher position than the nozzle, the liquid is likely to leak from the nozzle. In this regard, according to this configuration, at least a part of the waste liquid flow passage passes through a position higher than the height of the liquid surface in the storage chamber until the housing is tilted to the predetermined angle. Therefore, even when the housing chamber is configured to communicate with the atmosphere, the possibility of continuous leakage of the liquid from the nozzle can be reduced.
[ idea 7]
The liquid ejecting apparatus according to any one of [ idea 1] to [ idea 6], characterized in that,
in a state where the housing is placed on a horizontal plane, the liquid level is located at a lower position than the nozzle,
in a state where the housing is inclined by 30 degrees from a state where the housing is placed on the horizontal plane, the liquid surface is located at a position higher than the nozzle, and at least a part of the waste liquid flow passage passes through a position higher than the height of the liquid surface.
For example, the maximum angle of inclination of the ramp or the maximum angle of inclination of the aircraft during takeoff is approximately 20 degrees, and the angle of inclination of the aircraft during hover is less than 30 degrees. Therefore, by setting the predetermined angle to 30 degrees with reference to the state where the casing is placed on the horizontal plane, the possibility of the liquid continuing to leak can be reduced even when the casing is tilted during transportation.
[ idea 8]
The liquid ejecting apparatus according to any one of [ idea 1] to [ idea 7], characterized in that,
further comprising a guide section configured to guide the waste liquid flow path,
the waste liquid flow path has a folded portion of which a part is folded back,
the guide portion guides the waste liquid channel so that the folded portion is located at a position higher than the height of the liquid surface of the liquid storage portion until the case is tilted to the predetermined angle.
According to this configuration, since the waste liquid channel has the folded portion, the length of the waste liquid channel can be shortened as compared with a case where the waste liquid channel is routed around another member, for example. Since the liquid ejecting apparatus includes the guide portion configured to guide the folded portion, at least a part of the waste liquid channel can be easily held at a position higher than the height of the liquid surface.
Description of the symbols
11 … complex machine; 12 … liquid ejection device; 13 … image reading means; 15 … an operation part; 16 … display part; 17 … operating panel; 19 … a liquid storage part; 20 … a housing; 21 … window portion; 23 … containing chamber; 23a … upper wall; 23b … are communicated with the holes; 24 … injection part; 26 … visual confirmation surface; 27 … lower limit scale; 28 … upper limit scale; 30 … nozzle forming face; a 31 … nozzle; 32 … liquid jet head; 33 … a carriage; 35 … liquid supply part; 36 … maintenance part; 38 … liquid supply channel; 39 … intermediate storage; a 40 … filter; a 42 … cover; 43 … waste liquid channel; 43a … upstream flow path; 43b … downstream flow path; 43c … folded back portion; 43d … high; 44 … suction mechanism; 45 … inlet; 46 … waste liquid container; 47 … guide portion; 50 … bag body as an example of the liquid storage part; 51 … a housing; 52 … derivation section; 54 … injection flow path; 55 … supplementary bottle; a … use posture; b … tilt attitude; the X … width direction; y … depth direction; z … height direction; l1 … first liquid level; l2 … second liquid level.
Claims (8)
1. A liquid ejecting apparatus includes:
a liquid ejecting head configured to eject the liquid supplied from a liquid accommodating portion accommodating the liquid from a nozzle;
a cap configured to form a closed space of the nozzle opening;
a waste liquid flow passage, an upstream end of which is connected to the cover;
a suction mechanism provided in the middle of the waste liquid channel and configured to suck the liquid from the liquid ejecting head through the cap;
a case that houses at least the liquid ejecting head, the cap, and the suction mechanism,
the housing is inclined from a state in which a liquid surface in the liquid storage portion is lower than the nozzle to a predetermined angle higher than the nozzle, and at least a part of the waste liquid flow passage passes through a position higher than the liquid surface.
2. Liquid ejection apparatus according to claim 1,
in a state where the liquid storage portion stores a maximum amount of the liquid, at least a part of the waste liquid flow passage passes through a position higher than a height of the liquid surface until the case is tilted to the predetermined angle.
3. Liquid ejection apparatus according to claim 1,
at least a part of the waste liquid flow path on a downstream side of the suction mechanism passes through a position higher than the height of the liquid surface until the housing is tilted to the predetermined angle.
4. Liquid ejection apparatus according to claim 1,
at least a part of the waste liquid channel on an upstream side of the suction mechanism passes through a position higher than the height of the liquid surface until the housing is tilted to the predetermined angle.
5. Liquid ejection apparatus according to claim 1,
further comprising a waste liquid housing section configured to introduce the liquid discharged from the waste liquid flow path from an inlet port,
the introduction port is located at a position lower than the height of the liquid surface in a state where the housing is tilted by the predetermined angle.
6. Liquid ejection apparatus according to claim 1,
the liquid storage unit is configured such that a storage chamber for storing the liquid is communicated with the atmosphere,
at least a part of the waste liquid flow path passes through a position higher than the height of the liquid surface in the storage chamber until the housing is tilted to the predetermined angle.
7. The liquid ejecting apparatus as claimed in any one of claims 1 to 6,
in a state where the housing is placed on a horizontal surface, the liquid surface is located at a lower position than the nozzle,
in a state where the housing is inclined by 30 degrees from a state where the housing is placed on the horizontal plane, the liquid surface is located at a position higher than the nozzle, and at least a part of the waste liquid flow passage passes through a position higher than the height of the liquid surface.
8. Liquid ejection apparatus according to claim 1,
further comprising a guide section configured to guide the waste liquid flow path,
the waste liquid flow path has a folded portion of which a part is folded back,
the guide portion guides the waste liquid channel so that the folded portion is located at a position higher than the height of the liquid surface of the liquid storage portion until the case is tilted to the predetermined angle.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018093759A JP2019198997A (en) | 2018-05-15 | 2018-05-15 | Liquid injection device |
| JP2018-093759 | 2018-05-15 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110481163A CN110481163A (en) | 2019-11-22 |
| CN110481163B true CN110481163B (en) | 2022-07-05 |
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ID=68546270
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910388178.0A Active CN110481163B (en) | 2018-05-15 | 2019-05-10 | Liquid ejecting apparatus |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2019198997A (en) |
| CN (1) | CN110481163B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159359A (en) * | 1996-01-17 | 1997-09-17 | 株式会社松本机械制作所 | Centrifugal filtering method and device |
| JP2005319655A (en) * | 2004-05-07 | 2005-11-17 | Matsushita Electric Ind Co Ltd | Ink feeding device in inkjet recorder |
| JP2013248757A (en) * | 2012-05-30 | 2013-12-12 | Riso Kagaku Corp | Inkjet printer |
| CN104972760A (en) * | 2014-04-08 | 2015-10-14 | 兄弟工业株式会社 | Liquid discharge apparatus |
| CN105966081A (en) * | 2015-03-12 | 2016-09-28 | 精工爱普生株式会社 | Tank, tank unit, liquid injection system, and liquid injection device |
| CN106004058A (en) * | 2015-03-26 | 2016-10-12 | 精工爱普生株式会社 | Tank, tank unit and liquid ejection system |
-
2018
- 2018-05-15 JP JP2018093759A patent/JP2019198997A/en active Pending
-
2019
- 2019-05-10 CN CN201910388178.0A patent/CN110481163B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1159359A (en) * | 1996-01-17 | 1997-09-17 | 株式会社松本机械制作所 | Centrifugal filtering method and device |
| JP2005319655A (en) * | 2004-05-07 | 2005-11-17 | Matsushita Electric Ind Co Ltd | Ink feeding device in inkjet recorder |
| JP2013248757A (en) * | 2012-05-30 | 2013-12-12 | Riso Kagaku Corp | Inkjet printer |
| CN104972760A (en) * | 2014-04-08 | 2015-10-14 | 兄弟工业株式会社 | Liquid discharge apparatus |
| CN105966081A (en) * | 2015-03-12 | 2016-09-28 | 精工爱普生株式会社 | Tank, tank unit, liquid injection system, and liquid injection device |
| CN106004058A (en) * | 2015-03-26 | 2016-10-12 | 精工爱普生株式会社 | Tank, tank unit and liquid ejection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110481163A (en) | 2019-11-22 |
| JP2019198997A (en) | 2019-11-21 |
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