Negative pressure tank for ink-jet printing

Abstract

The utility model relates to a negative pressure tank for ink-jet printing, which is characterized in that the negative pressure tank comprises a tank body, an air bag assembly, a counterweight disc and a push-pull assembly. The air bag assembly and the balance weight disc are both arranged in the tank body, an air pressure opening is formed in the outer wall of the tank body, the air pressure opening is communicated with the interior of the air bag assembly, and the air pressure opening is used for being communicated with an ink box of the printer. The balance weight disc is fixedly connected with the air bag assembly, the push-pull assembly is arranged on the outer wall of the tank body, and the movable end of the push-pull assembly can push the balance weight disc to move upwards in the vertical direction, so that the internal volume of the air bag assembly is changed. The air bag assembly provides negative pressure for the ink box through the gravity of the balance weight disc, the negative pressure in the ink box does not need to be compensated actively without electrifying an air pump, and it is guaranteed that the negative pressure in the ink box and an ink path is still stable when the ink-jet printing equipment is in a power-down state.

Description

Technical Field

[0001] The utility model relates to the field of inkjet printing, in particular to a negative pressure tank used for inkjet printing. Background Art

[0002] Negative pressure ink lifting and positive pressure ink pressing are two basic maintenance functions of inkjet printers. Negative pressure ink lifting mainly detects the air pressure value of the ink path through the air pressure sensor and adjusts the air pressure to a reasonable range through the air pump. The disadvantage is that the adjustment accuracy is not high due to the accuracy of the sensor, and the use of high-precision sensors increases the cost. It is difficult to maintain the stability of the ink path air pressure when the inkjet printing equipment is powered off, resulting in an imbalance of internal and external air pressure. Utility Model Content

[0003] 1. Technical issues to be resolved

[0004] The utility model provides a negative pressure tank for inkjet printing, aiming to solve the technical problem of unstable air pressure in the ink path when the inkjet printing device is powered off in the prior art.

[0005] (II) Technical solution

[0006] In order to solve the above problems, the utility model provides a negative pressure tank for inkjet printing, the negative pressure tank comprising: a tank body, an air bag assembly, a counterweight plate and a push-pull assembly;

[0007] The airbag assembly and the counterweight plate are both arranged in the tank body, and an air pressure port is arranged on the outer wall of the tank body, the air pressure port is communicated with the interior of the airbag assembly, and the air pressure port is used to communicate with the ink cartridge of the printer;

[0008] The counterweight plate is fixedly connected to the airbag assembly, the push-pull assembly is arranged on the outer wall of the tank, and the movable end of the push-pull assembly can push the counterweight plate to move upward in the vertical direction, so that the internal volume of the airbag assembly changes.

[0009] Preferably, the negative pressure tank further comprises a detection component, and the detection component comprises a magnetic element and a sensor;

[0010] The magnetic element is arranged on a side of the counterweight plate close to the inner wall of the tank body, and the sensor is arranged on the outer wall of the tank body. The sensor is used to detect the position of the magnetic element.

[0011] Preferably, the tank body is cylindrical in shape, the counterweight plate is disc-shaped, and the magnetic element is annular; an annular groove is provided on the circumferential surface of the counterweight plate, and the magnetic element is arranged in the annular groove.

[0012] Preferably, the outer wall of the tank body is provided with a groove along the center line direction thereof, and the sensor is arranged in the groove.

[0013] Preferably, the push-pull assembly includes a tray, a connecting rod and an electric push rod, the electric push rod is arranged on the outer wall of the tank body, the tray is arranged inside the tank body, and the tank body is penetrated by a movable groove for the connecting rod to pass through, one end of the connecting rod is fixedly connected to the tray, and the other end of the connecting rod is connected to the movable end of the electric push rod.

[0014] Preferably, the airbag assembly comprises a plurality of flexible telescopic elements arranged in sequence;

[0015] The flexible telescopic element comprises an annular support portion and flexible telescopic portions arranged on both sides of the annular support portion;

[0016] In one of the flexible telescopic elements, the flexible telescopic portion and the annular support portion can enclose a telescopic air cavity that can be telescopic;

[0017] Two adjacent flexible telescopic elements are connected via a flexible connection portion, a ventilation cavity is provided in the flexible connection portion, and the telescopic air cavities of the two adjacent flexible telescopic elements are connected via the ventilation cavity.

[0018] Preferably, the air pressure port is arranged on the top surface of the tank body.

[0019] (III) Beneficial effects

[0020] When the printer of the utility model prints, the airbag assembly in the tank is first compressed by the push-pull assembly, and then the air pressure port is connected to the ink cartridge, and then the push-pull assembly releases the counterweight plate, and the counterweight plate pulls the airbag assembly under the action of gravity, so that the airbag assembly has a tendency to expand, and at this time the air pressure port can provide a negative pressure environment in the ink cartridge to achieve the function of negative pressure ink lifting. The airbag assembly uses the gravity of the counterweight plate to provide negative pressure in the ink cartridge, and there is no need to energize the air pump to actively compensate for the negative pressure in the ink cartridge, ensuring that when the inkjet printing device is powered off, the negative pressure in the ink cartridge and the ink path remains stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the overall structure of the negative pressure tank used for inkjet printing in the utility model;

[0022] Figure 2 It is a top view of the negative pressure tank used for inkjet printing in the utility model;

[0023] Figure 3 for Figure 2 Cross-sectional view at CC;

[0024] Figure 4 for Figure 3 Schematic diagram of the negative pressure tank after being rotated a certain angle.

[0025] [Description of Reference Numerals]

[0026] 1: tank body; 11: air pressure port; 12: groove; 13: movable groove; 2: airbag assembly; 21: flexible telescopic element; 211: annular support portion; 212: flexible telescopic portion; 213: telescopic air cavity; 22: flexible connecting portion; 221: ventilation cavity; 3: counterweight plate; 31: annular groove; 4: push-pull assembly; 41: tray; 42: connecting rod; 43: electric push rod; 51: magnetic element; 52: sensor. DETAILED DESCRIPTION

[0027] In order to better explain the present invention and facilitate understanding, the present invention is described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0028] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0029] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0030] In the present invention, unless otherwise clearly specified and limited, the terms "connection", "fixation", etc. should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0031] The utility model provides a negative pressure tank for inkjet printing, which includes: a tank body 1, an airbag assembly 2, a counterweight plate 3 and a push-pull assembly 4. The airbag assembly 2 and the counterweight plate 3 are both arranged in the tank body 1, and an air pressure port 11 is arranged on the outer wall of the tank body 1, and the air pressure port 11 is communicated with the interior of the airbag assembly 2, and the air pressure port 11 is used to communicate with the ink cartridge of the printer. The counterweight plate 3 is fixedly connected to the airbag assembly 2, and the push-pull assembly 4 is arranged on the outer wall of the tank body 1, and the movable end of the push-pull assembly 4 can push the counterweight plate 3 to move upward in the vertical direction, so that the internal volume of the airbag assembly 2 changes.

[0032] In the technical solution of the present application, when the printer is printing, the airbag assembly 2 in the tank body 1 is first compressed by the push-pull assembly 4, and then the air pressure port 11 is connected to the ink cartridge, and then the push-pull assembly 4 releases the counterweight plate 3, and the counterweight plate 3 pulls the airbag assembly 2 under the action of gravity, so that the airbag assembly 2 has a tendency to expand. At this time, the air pressure port 11 can provide a negative pressure environment in the ink cartridge to achieve the function of negative pressure ink lifting. In the above scheme, the airbag assembly 2 uses the gravity of the counterweight plate 3 to provide negative pressure to the ink cartridge, and there is no need to energize the air pump to actively compensate for the negative pressure in the ink cartridge, ensuring that when the inkjet printing device is powered off, the negative pressure in the ink cartridge and the ink path is still stable. In addition, the present application can also compress the airbag assembly 2 and then provide positive pressure to the ink cartridge through the air pressure port 11, and finally complete the flushing of the nozzle.

[0033] Furthermore, the negative pressure tank also includes a detection component, which includes a magnetic element 51 and a sensor 52. The magnetic element 51 is arranged on the side of the counterweight plate 3 close to the inner wall of the tank body 1, and the sensor 52 is arranged on the outer wall of the tank body 1. The sensor 52 is used to detect the position of the magnetic element 51. By using the sensor 52 to detect the position of the magnetic element 51, the position of the counterweight plate 3 can be monitored in real time. The sensor 52 cooperates with the magnetic element 51 to achieve non-contact measurement. It does not affect the counterweight accuracy.

[0034] Furthermore, the tank body 1 is cylindrical, the counterweight plate 3 is disc-shaped, and the magnetic element 51 is annular; an annular groove 31 is provided on the circumferential surface of the counterweight plate 3, and the magnetic element 51 is arranged in the annular groove 31. The outer wall of the tank body 1 is provided with a groove 12 along the center line direction thereof, and the sensor 52 is arranged in the groove 12. The sensor 52 is fixed by the groove 12 structure, and the position can be adjusted steplessly. The sensor 52 can be a Hall sensor 52.

[0035] In a preferred embodiment, the push-pull assembly 4 includes a tray 41, a connecting rod 42 and an electric push rod 43. The electric push rod 43 is arranged on the outer wall of the tank body 1, and the tray 41 is arranged in the tank body 1. A movable groove 13 for the connecting rod 42 to pass through is provided on the tank body 1. One end of the connecting rod 42 is fixedly connected to the tray 41, and the other end of the connecting rod 42 is connected to the movable end of the electric push rod 43.

[0036] In another embodiment, the airbag assembly 2 includes a plurality of flexible telescopic elements 21 arranged in sequence. The flexible telescopic element 21 includes an annular support portion 211 and flexible telescopic portions 212 arranged on both sides of the annular support portion 211. In a flexible telescopic element 21, the flexible telescopic portion 212 and the annular support portion 211 can be combined to form a telescopic air cavity 213 that can be telescopic. Two adjacent flexible telescopic elements 21 are connected by a flexible connection portion 22, and a ventilation cavity 221 is arranged in the flexible connection portion 22. The telescopic air cavities 213 of the two adjacent flexible telescopic elements 21 are connected through the ventilation cavity 221. The airbag assembly 2 is configured to be a plurality of flexible telescopic elements 21 arranged in an arranged manner, wherein the annular support portion 211 in the flexible telescopic element 21 is a hard support, which is incompressible, reduces its own stress, and can increase the effective movement stroke of the counterweight, making it easier for the device to reach a balance point when under negative pressure, and can provide more pressurized air when under positive pressure. Finally, the air pressure port 11 is arranged on the top surface of the tank body 1.

[0037] It should be understood that the above description of the specific embodiments of the utility model is only for illustrating the technical route and features of the utility model, and its purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, but the utility model is not limited to the above specific implementation methods. All changes or modifications made within the scope of the claims of the utility model should be included in the protection scope of the utility model.

Claims

1. A negative pressure tank for inkjet printing, characterized in that: The negative pressure tank comprises: a tank body (1), an air bag assembly (2), a counterweight plate (3) and a push-pull assembly (4); The airbag assembly (2) and the counterweight plate (3) are both arranged in the tank body (1); an air pressure port (11) is arranged on the outer wall of the tank body (1); the air pressure port (11) is communicated with the interior of the airbag assembly (2); and the air pressure port (11) is used to communicate with an ink cartridge of a printer; The counterweight plate (3) is fixedly connected to the airbag assembly (2), the push-pull assembly (4) is arranged on the outer wall of the tank body (1), and the movable end of the push-pull assembly (4) can push the counterweight plate (3) to move upward in the vertical direction, so that the internal volume of the airbag assembly (2) changes.

2. The negative pressure tank for inkjet printing according to claim 1, characterized in that: The negative pressure tank further comprises a detection component, wherein the detection component comprises a magnetic element (51) and a sensor (52); The magnetic element (51) is arranged on a side of the counterweight plate (3) close to the inner wall of the tank body (1), and the sensor (52) is arranged on the outer wall of the tank body (1). The sensor (52) is used to detect the position of the magnetic element (51).

3. The negative pressure tank for inkjet printing according to claim 2, characterized in that: The tank body (1) is cylindrical in shape, the counterweight plate (3) is disc-shaped, and the magnetic element (51) is annular; an annular groove (31) is provided on the circumferential surface of the counterweight plate (3), and the magnetic element (51) is arranged in the annular groove (31).

4. The negative pressure tank for inkjet printing according to claim 3, characterized in that: The outer wall of the tank body (1) is provided with a groove (12) along the center line direction thereof, and the sensor (52) is arranged in the groove (12).

5. The negative pressure tank for inkjet printing according to any one of claims 1 to 4, characterized in that: The push-pull assembly (4) comprises a tray (41), a connecting rod (42) and an electric push rod (43); the electric push rod (43) is arranged on the outer wall of the tank body (1); the tray (41) is arranged in the tank body (1); a movable groove (13) for the connecting rod (42) to pass through is provided on the tank body (1); one end of the connecting rod (42) is fixedly connected to the tray (41); and the other end of the connecting rod (42) is connected to the movable end of the electric push rod (43).

6. The negative pressure tank for inkjet printing according to any one of claims 1 to 4, characterized in that: The airbag assembly (2) comprises a plurality of flexible telescopic elements (21) arranged in sequence; The flexible telescopic element (21) comprises an annular support portion (211) and flexible telescopic portions (212) arranged on both sides of the annular support portion (211); In one of the flexible telescopic elements (21), the flexible telescopic portion (212) and the annular support portion (211) can be combined to form a telescopic air cavity (213) that can be telescopic; Two adjacent flexible telescopic elements (21) are connected via a flexible connection portion (22), a ventilation cavity (221) is provided in the flexible connection portion (22), and the telescopic air cavities (213) of the two adjacent flexible telescopic elements (21) are connected via the ventilation cavity (221).

7. The negative pressure tank for inkjet printing according to any one of claims 1 to 4, characterized in that: The air pressure port (11) is arranged on the top surface of the tank body (1).

Images