CN201257801Y - Ink cartridge for ink jet printer - Google Patents

Abstract

The utility model relates to an ink box used for an inkjet printer. It includes an ink storage chamber for storing ink, an air inlet to maintain air pressure balance with the external environment, an ink outlet to supply ink to the print head of the printer, and a negative pressure mechanism. The negative pressure mechanism is a capillary channel that communicates with the air inlet at one end The ink storage chamber is divided into a first ink storage chamber and a second ink storage chamber through a partition with a gap on the upper part, the other end of the capillary channel is located at the bottom of the first ink storage chamber, and the ink outlet is located at the bottom of the first ink storage chamber. As the ink in the second ink storage chamber is consumed, the ink in the first ink storage chamber does not decrease all the time, thereby ensuring that the negative pressure inside the ink cartridge is in a constant state and will not change with the reduction of the amount of ink.

Description

A kind of ink cartridge for inkjet printer

technical field

The utility model relates to an ink box used for an inkjet printer.

Background technique

The main structure of an existing ink cartridge for an inkjet printer includes an ink storage chamber for storing ink, an air inlet for maintaining air pressure balance with the external environment, an ink outlet for supplying ink to the print head of the printer, and a negative pressure mechanism. The negative pressure mechanism is a mechanism that keeps the ink in the ink cartridge in a certain negative pressure state in order to ensure normal ink supply and ink storage requirements. The negative pressure mechanism usually uses a capillary channel (inner diameter less than 1mm) as shown in Figure 1. Insert it into the ink cartridge, one end is connected to the atmosphere as the air inlet of the ink cartridge, and the other end is at the bottom of the ink storage chamber of the ink cartridge. Enter the ink cartridge from the outside through one end of the capillary channel. Since the other end of the capillary channel is submerged in the ink and is at the bottom of the ink storage chamber, the air must overcome a certain water pressure to enter, resulting in filling the ink storage chamber. The volume of air is always smaller than the volume of ink sucked away by the printer, so that the inside of the ink cartridge is always in a negative pressure state. In this way, when there is more ink in the ink storage chamber (when the liquid level is high), there is no problem in printing. As the amount of ink decreases, the ink in the ink storage chamber becomes less and less (the liquid level decreases), and the negative pressure in the ink cartridge will increase. It gets smaller and smaller until the capillary channel is completely exposed to the water surface, and there is no negative pressure in the ink cartridge. At this time, a certain amount of ink remains in the ink cartridge. If there is no negative pressure in the ink cartridge, the ink will drip out from the print head, which will affect the printing quality and pollute the printer.

Utility model content

The utility model provides an ink cartridge for an ink-jet printer to solve the problem that the existing ink cartridge for the ink-jet printer has little remaining ink and the ink will drip from the print head due to the lack of negative pressure in the ink cartridge or the negative pressure is very small. It is a technical problem that affects the print quality and pollutes the printer and causes waste.

In order to solve the above technical problems, the technical scheme that the utility model takes is:

An ink cartridge for an inkjet printer, comprising an ink storage cavity for storing ink, an air intake hole for maintaining air pressure balance with the external environment, an ink outlet for supplying ink to the print head of the printer, and a negative pressure mechanism, the negative pressure mechanism It is a capillary channel that communicates with the air inlet at one end, and is characterized in that the ink storage chamber is divided into a first ink storage chamber and a second ink storage chamber through a partition with a gap on the upper part, and the other end of the capillary channel is located at The bottom of the first ink storage chamber, the ink outlet is located at the bottom of the first ink storage.

The end of the capillary channel close to the air inlet is arranged in a labyrinth shape.

After adopting the above technical scheme, since the ink storage chamber is divided into the first ink storage chamber and the second ink storage chamber through the partition plate with a gap on the upper part, the other end of the capillary channel is located at the bottom of the first ink storage chamber, and the ink outlet The port is located at the bottom of the first ink storage chamber, because the specific gravity of air is smaller than that of ink, the air can directly enter the second ink storage chamber from the first ink storage chamber, and the ink in the first ink storage chamber will not enter the second ink storage chamber; As the ink in the second ink storage chamber is consumed, because the ink in the first ink storage chamber has not decreased all the time, it is ensured that the negative pressure inside the ink cartridge is in a constant state and will not change with the reduction of the amount of ink. It solves the technical problem that the existing ink cartridges used in inkjet printers will drip from the print head due to the lack of negative pressure or very small negative pressure in the ink cartridges when the amount of remaining ink is small, which will affect the printing quality and pollute the printer and cause waste. .

Description of drawings

FIG. 1 is a schematic structural view of an existing ink cartridge used in an inkjet printer.

Fig. 2 is a structural representation of the utility model.

In the figure, the meanings of the symbols are: 1. the first ink storage chamber, 2. the air inlet, 3. the ink outlet, 4. the capillary channel, 5. the second ink storage chamber, and 6. partitions.

Detailed ways

As shown in Figure 2, an ink cartridge for an inkjet printer includes an ink storage chamber for storing ink, an air inlet 2 for maintaining air pressure balance with the external environment, and an ink outlet 3 for supplying ink to the print head of the printer And the negative pressure mechanism, the negative pressure mechanism is the capillary channel 4 that one end communicates with the air intake hole, and the end of the capillary channel 4 near the air intake hole 2 is set as a labyrinth, and the ink storage chamber is divided into the first by the partition plate 6 with a gap in the upper part. In the ink storage chamber 1 and the second ink storage chamber 5, the other end of the capillary channel 4 is located at the bottom of the first ink storage chamber 1, and the ink outlet is located at the bottom of the first ink storage chamber. The capillary channel 4 is formed by welding the forming groove of the ink cartridge body and the sealing film. When the printer works, part of the ink in the second ink storage chamber 5 is drawn away, and a certain degree of negative pressure will be formed in the ink cartridge body, and the air enters the inside of the ink cartridge body through the end of the capillary passage 4 from the outside, but due to the capillary passage 4 The other end is submerged in the ink of the first ink storage chamber 1, and is at the bottom of the first ink storage chamber 1. The air must overcome the ink water pressure of the first ink storage chamber 1 to enter, so the filling of the ink storage chamber The volume of air is always smaller than the volume of ink sucked by the printer, so that the inside of the ink cartridge is always in a negative pressure state. Since the first ink storage chamber 1 and the second ink storage chamber 5 of the ink cartridge body are separated by a partition 6, the air can directly enter the second ink storage chamber 5 from the first ink storage chamber 1 because the specific gravity of the air is smaller than the ink. , and the ink in the first ink storage chamber 1 will not enter the second ink storage chamber 5; as the ink in the second ink storage chamber 5 is consumed, the ink in the first ink storage chamber 1 will not decrease all the time, thus ensuring the ink cartridge The internal negative pressure is in a constant state and will not change with the reduction of the ink volume, so as to ensure the printing quality of the ink cartridge.

Claims (2)

1. An ink cartridge for an inkjet printer, comprising an ink storage chamber for storing ink, an air intake hole for maintaining air pressure balance with the external environment, an ink outlet for supplying ink to the print head of the printer, and a negative pressure mechanism. The pressure mechanism is a capillary channel whose one end communicates with the air inlet. It is characterized in that the ink storage chamber is divided into a first ink storage chamber and a second ink storage chamber through a partition with a gap on the upper part, and the other part of the capillary channel is One end is located at the bottom of the first ink storage chamber, and the ink outlet is located at the bottom of the first ink storage. 2. The ink cartridge for an inkjet printer according to claim 1, wherein the end of the capillary channel near the air inlet hole is arranged in a labyrinth shape.

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