Pressure adjusting system in printer

Abstract

The utility model relates to a pressure regulating system in a printer. The pressure regulating system comprises an air storage tank, a first air pump and a second air pump, the air storage tank is provided with a first inlet, a second inlet and a pressure adjusting opening, the first air pump is connected with the first inlet through a pipeline, the second air pump is connected with the second inlet through a pipeline, and the pressure adjusting opening is used for being connected with a spray head in the printer. The first air pump pumps air into the air storage tank through the first inlet, so that the pressure at the pressure adjusting port is positive pressure; and the second air pump pumps air into the air storage tank through the second inlet, so that the pressure at the pressure adjusting port is negative pressure. According to the utility model, the first air pump and the second air pump are connected to the air storage tank, then the pressure adjusting port is arranged on the air storage tank, and the pressure adjusting port is connected with the nozzle through the pipeline. Positive and negative pressure switching at the nozzle can be achieved only by changing opening and closing of the first air pump and the second air pump, switching is rapid, and operation is easy.

Description

Technical Field

[0001] The utility model relates to the field of printers, in particular to a pressure regulating system in a printer. Background Art

[0002] Generally, in a printer, the ink cartridge is above and the print head is below. The ink holes on the lower surface of the print head are communicated with the atmosphere, so that the ink in the ink cartridge continuously provides ink to the print head under the action of gravity. When the printer is working, a constant negative pressure is usually required to be provided at the ink cartridge, so that the ink between the ink cartridge and the print head overcomes its own gravity and maintains the suspended state of the ink between the ink cartridge and the print head, facilitating the ink to be ejected onto the surface of the printing medium through the print head. When maintaining and cleaning the print head, a positive pressure needs to be input into the ink cartridge and the print head so that the ink in the ink cartridge is ejected from the print head to achieve the purpose of cleaning the print head. In existing inkjet printers, the components for providing negative pressure and positive pressure to the print head generally use a complex mechanical structure to achieve, and the switching process between negative pressure and positive pressure is slow and the operation is cumbersome. Summary of the Utility Model

[0003] (1) Technical Problems to be Solved

[0004] The utility model provides a pressure regulating system in a printer, aiming at solving the problems of slow switching process between positive and negative pressures at the print head in the printer and cumbersome operation in the prior art.

[0005] (2) Technical Solutions

[0006] To solve the above problems, the utility model provides a pressure regulating system in a printer. The pressure regulating system in a printer includes: an air storage tank, a first air pump and a second air pump;

[0007] The air storage tank is provided with a first inlet, a second inlet and a pressure regulating port. The first air pump is connected to the first inlet through a pipeline, the second air pump is connected to the second inlet through a pipeline, and the pressure regulating port is used for connecting to the print head in the printer;

[0008] The first air pump pumps gas into the air storage tank through the first inlet so that the pressure at the pressure regulating port is positive pressure; the second air pump pumps gas out of the air storage tank through the second inlet so that the pressure at the pressure regulating port is negative pressure.

[0009] Preferably, a first electromagnetic valve is arranged on the pipeline connecting the first inlet and the first air pump, and a second electromagnetic valve is arranged on the pipeline connecting the second inlet and the second air pump.

[0010] Preferably, both the first electromagnetic valve and the second electromagnetic valve are two-position three-way electromagnetic valves;

[0011] When both the first solenoid valve and the second solenoid valve are in the first working position, the pipeline connecting the first air pump and the first inlet is in a communicating state, and the pipeline connecting the second air pump and the second inlet is in a disconnected state;

[0012] When both the first solenoid valve and the second solenoid valve are in the second working position, the pipeline connecting the first air pump and the first inlet is in a disconnected state, and the pipeline connecting the second air pump and the second inlet is in a communicating state.

[0013] Preferably, a pressure gauge for detecting the internal pressure of the air storage tank is further provided on the air storage tank.

[0014] Preferably, the pressure regulating system further includes a pair of bases arranged in pairs. An arc-shaped groove is provided on the base, and the radius of the arc-shaped groove is equal to the radius of the air storage tank. The air storage tank is arranged on the arc-shaped groove.

[0015] Preferably, a pair of fixing holes are provided on the base, and the arc-shaped groove is located between the pair of fixing holes.

[0016] (III) Beneficial effects

[0017] In the present utility model, by connecting a first air pump and a second air pump to an air storage tank, then providing a pressure regulating port on the air storage tank, and connecting the pressure regulating port to a nozzle through a pipeline, the first air pump pumps gas into the air storage tank to provide positive pressure for the nozzle, and the second air pump pumps gas out of the air storage tank to provide negative pressure for the nozzle. The switching of positive and negative pressures at the nozzle only needs to change the opening and closing of the first air pump and the second air pump, with rapid switching and simple operation. Description of the drawings

[0018] Figure 1 is a schematic diagram of the overall structure of a pressure regulating system in a printer in the present utility model;

[0019] Figure 2 is a schematic diagram of the structure of a pressure regulating system in a printer in the present utility model from another perspective;

[0020] Figure 3 is a pipeline connection diagram of the air storage tank, the first air pump, and the second air pump in the present utility model.

[0021]

Description of the reference numerals

[0022] 1: Air storage tank; 11: Pressure regulating port; 12: Pressure gauge. 2: First air pump; 21: First solenoid valve; 3: Second air pump; 31: Second solenoid valve; 4: Base; 41: Arc-shaped groove; 42: Fixing hole. Detailed implementation manners

[0023] To better explain the present utility model for easy understanding, the present utility model will be described in detail below in conjunction with the accompanying drawings and through specific embodiments.

[0024] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present utility model are only used to explain the relative positional relationship and movement conditions between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indications will also change accordingly.

[0025] In addition, in the present utility model, descriptions such as "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0026] In the present utility model, unless otherwise clearly specified and limited, terms such as "connection" and "fixation" should be understood in a broad sense. For example, "fixation" can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0027] The present utility model provides a pressure regulation system inside a printer. A pressure regulation system inside a printer includes: an air storage tank 1, a first air pump 2, and a second air pump 3. The air storage tank 1 is provided with a first inlet, a second inlet, and a pressure regulation port 11. The first air pump 2 is connected to the first inlet through a pipeline, the second air pump 3 is connected to the second inlet through a pipeline, and the pressure regulation port 11 is used to be connected to a nozzle inside the printer. Specifically, the pressure regulation port 11 is connected to the nozzle through an ink cartridge. The first air pump 2 pumps gas into the air storage tank 1 through the first inlet so that the pressure at the pressure regulation port 11 is positive pressure; the second air pump 3 pumps gas out of the air storage tank 1 through the second inlet so that the pressure at the pressure regulation port 11 is negative pressure.

[0028] When the printer is in use, a constant negative pressure is required at the nozzle to enable the nozzle to eject ink stably for clear printing. At this time, only the second air pump 3 needs to pump gas into the gas storage tank 1, and the pressure regulating port 11 of the gas storage tank 1 applies a negative pressure to the ink cartridge to achieve the effect of applying a negative pressure to the nozzle. On the contrary, when the nozzle needs to be cleaned or maintained, the second air pump 3 is turned off, and the first air pump 2 pumps gas into the gas storage tank 1. The pressure regulating port 11 applies a positive pressure to the ink cartridge through a pipeline to make the nozzle eject ink outward to achieve the effect of cleaning the nozzle. Through the above analysis, it can be seen that in the present utility model, two air pumps (the first air pump 2 and the second air pump 3) are connected to one gas storage tank 1, and then a pressure regulating port 11 is provided on the gas storage tank 1, and the pressure regulating port 11 is connected to the nozzle through a pipeline. The first air pump 2 pumps gas into the gas storage tank 1 to achieve the effect of providing a positive pressure for the nozzle, and the second air pump 3 pumps gas out of the gas storage tank 1 to achieve the effect of providing a negative pressure for the nozzle. The switching of the positive and negative pressures at the nozzle only needs to change the opening and closing of the first air pump 2 and the second air pump 3, and the switching is rapid and the operation is simple.

[0029] Further, a first solenoid valve 21 is provided on the pipeline connecting the first inlet and the first air pump 2, and a second solenoid valve 31 is provided on the pipeline connecting the second inlet and the second air pump 3. The setting of the first solenoid valve 21 and the second solenoid valve 31 can quickly and automatically change the connection state between the first air pump 2 and the first inlet, and between the second air pump 3 and the second inlet, achieving the effect of rapid switching.

[0030] Specifically, both the first solenoid valve 21 and the second solenoid valve 31 are two-position three-way solenoid valves. When both the first solenoid valve 21 and the second solenoid valve 31 are in the first working position, the pipeline connecting the first air pump 2 and the first inlet is in a connected state, and the pipeline connecting the second air pump 3 and the second inlet is in a disconnected state. When both the first solenoid valve 21 and the second solenoid valve 31 are in the second working position, the pipeline connecting the first air pump 2 and the first inlet is in a disconnected state, and the pipeline connecting the second air pump 3 and the second inlet is in a connected state.

[0031] Furthermore, a pressure gauge 12 for detecting the internal pressure of the gas storage tank 1 is also provided on the gas storage tank 1. The pressure inside the gas storage tank 1 is synchronously and real-time displayed by the pressure gauge 12. During normal printing, when the negative pressure is within the set range, the negative pressure value in the gas storage tank 1 can be controlled by software to be maintained within the set range to ensure the stable negative pressure required during printing.

[0032] Finally, the pressure regulating system further includes a pair of bases 4 arranged oppositely. An arc-shaped groove 41 is provided on the base 4, and the radius of the arc-shaped groove 41 is equal to the radius of the gas storage tank 1. The gas storage tank 1 is arranged on the arc-shaped groove 41. The provision of the base 4 facilitates the fixation of the cylindrical component such as the gas storage tank 1 and is convenient for the maintenance or replacement of the gas storage tank 1. In addition, a pair of fixing holes 42 are provided on the base 4, and the arc-shaped groove 41 is located between the pair of fixing holes 42. The provision of the fixing holes 42 on the base 4 facilitates the fixed installation of the base 4 inside the printer.

[0033] It should be understood that the above description of the specific embodiments of the present invention is only for explaining the technical route and features of the present invention, and its purpose is to enable those skilled in the art to understand the content of the present invention and implement it accordingly. However, the present invention is not limited to the above specific embodiments. Any changes or modifications made within the scope of the claims of the present invention should be covered by the protection scope of the present invention.

Claims

1. A pressure regulation system inside a printer, characterized in that, A pressure regulation system inside a printer comprises: an air storage tank (1), a first air pump (2), and a second air pump (3); The air storage tank (1) is provided with a first inlet, a second inlet, and a pressure regulation port (11). The first air pump (2) is connected to the first inlet through a pipeline, the second air pump (3) is connected to the second inlet through a pipeline, and the pressure regulation port (11) is used to be connected to a nozzle inside the printer; The first air pump (2) pumps gas into the air storage tank (1) through the first inlet so that the pressure at the pressure regulation port (11) is positive pressure; the second air pump (3) pumps gas out of the air storage tank (1) through the second inlet so that the pressure at the pressure regulation port (11) is negative pressure.

2. The pressure regulating system inside the printer as claimed in claim 1, characterized in that, A first solenoid valve (21) is arranged on the pipeline connecting the first inlet and the first air pump (2), and a second solenoid valve (31) is arranged on the pipeline connecting the second inlet and the second air pump (3).

3. The pressure regulation system in the printer according to claim 2, characterized in that, Both the first solenoid valve (21) and the second solenoid valve (31) are two-position three-way solenoid valves; When both the first solenoid valve (21) and the second solenoid valve (31) are in the first working position, the pipeline connecting the first air pump (2) and the first inlet is in a connected state, and the pipeline connecting the second air pump (3) and the second inlet is in a disconnected state; When both the first solenoid valve (21) and the second solenoid valve (31) are in the second working position, the pipeline connecting the first air pump (2) and the first inlet is in a disconnected state, and the pipeline connecting the second air pump (3) and the second inlet is in a connected state.

4. The pressure adjustment system in the printer according to any one of claims 1-3, characterized in that, A pressure gauge (12) for detecting the internal pressure of the air storage tank (1) is further arranged on the air storage tank (1).

5. The pressure regulation system within the printer according to any one of claims 1-3, characterized in that, The pressure regulation system further includes a pair of bases (4) arranged in pairs. An arc-shaped groove (41) is arranged on the base (4), and the radius of the arc-shaped groove (41) is equal to the radius of the air storage tank (1). The air storage tank (1) is arranged on the arc-shaped groove (41).

6. The pressure adjustment system in the printer as claimed in claim 5, wherein, A pair of fixing holes (42) are arranged on the base (4), and the arc-shaped groove (41) is located between the pair of fixing holes (42).

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