CN201257800Y - Ink cartridge for ink jet printer - Google Patents

Abstract

The utility model relates to an ink box used in an inkjet printer, which comprises an ink storage cavity for storing ink, an air inlet which keeps a pressure balance with the external pressure, and an ink exit and a negative pressure mechanism providing ink to the printing head of a printer. The negative pressure mechanism comprises an air channel and a constant-pressure cavity arranged at the bottom of the ink storage cavity. One end of the air channel is connected with the air inlet and the other end thereof is connected with the constant-pressure cavity; and a porous material is arranged inside the constant-pressure cavity. The porous material is arranged inside the constant-pressure cavity which has a size smaller than that of the ink storage cavity, so that even if the constant-pressure cavity is filled with the porous material, the amount of the porous material is not large, thereby having small ink absorption amount and reducing amount of the remaining ink after the ink box is used up.

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 adopts a sponge body built into the ink storage chamber as shown in Figure 1. , the ink is kept by the capillary effect of the sponge body; because the built-in sponge body is full of the ink storage chamber and has adsorption characteristics, the printer cannot completely absorb the ink in the sponge, and there is still a large amount of ink in the sponge after the ink cartridge is used up. The larger the volume, the more ink remains, and most of the ink remains in the sponge, causing waste and increasing the cost of use for users.

Utility model content

The utility model provides an ink cartridge for an ink-jet printer, which solves the technical problem that the existing ink cartridge for the ink-jet printer still has a large amount of ink and is wasted after being used up.

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 printing head of the printer, and a negative pressure mechanism, characterized in that , the negative pressure mechanism includes an air passage and a constant pressure chamber arranged at the bottom of the ink storage chamber, one end of the air passage is connected to the air inlet, and the other end communicates with the constant pressure chamber, and a porous material is arranged in the constant pressure chamber.

The porous material is a filter-like porous material.

The air channel is arranged in a labyrinth near the end of the air inlet.

The end of the air channel communicating with the constant pressure chamber is located at the bottom of the constant pressure chamber.

After adopting the above technical scheme, since the negative pressure mechanism includes an air passage and a constant pressure chamber arranged at the bottom of the ink storage chamber, one end of the air passage is connected to the air inlet, and the other end communicates with the constant pressure chamber, and the porous material is arranged on the opposite side of the volume. Compared with the ink storage chamber, the constant pressure chamber has a small volume. Therefore, even if it is filled with adsorbed porous materials, there are few porous materials, and the amount of ink absorption is also small, which reduces the amount of remaining ink after the ink cartridge is used up. The invention solves the technical problem that the conventional ink cartridge used for the inkjet printer still has a large amount of ink remaining after being used up, which causes waste. Secondly, because the porous material used is a filter screen, and the porous material of the filter screen generally does not absorb ink, so the amount of remaining ink after the ink cartridge is used up is further reduced. Finally, since the air channel is arranged in a labyrinth shape near the air intake hole, ink can be prevented from accidentally overflowing from the air channel, and the appearance of the ink cartridge can be protected from contamination.

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 marks are: 1 ink storage chamber, 2 air intake hole, 3 ink outlet, 4 air channel, 5 constant pressure chamber, 6 porous material, 7 sponge body.

Detailed ways

As shown in FIG. 2 , an ink cartridge for an inkjet printer includes an air channel 4 for storing ink that is arranged in a labyrinth near the end of the air inlet. During manufacture, the air channel 4 is formed by welding the forming groove of the ink cartridge body and the sealing film. The porous material 6 of filter screen is also fixed in the constant pressure chamber by welding. When the printer is working, part of the ink in the ink storage chamber 1 is drawn away, and a certain degree of negative pressure will be formed in the ink cartridge body, and the air will enter the ink cartridge body from the outside through one end of the air passage 4, but due to the other end of the air passage 4 Immersed in the constant pressure chamber, the constant pressure chamber is welded with filter mesh porous material 6, and is at the bottom of the ink storage chamber 1, so the air must overcome the ink water pressure of the constant pressure chamber 5 and the ink acts on the pores of the porous material The surface tension of the ink cartridge can enter, so that the volume of air added to the ink storage chamber 1 is always smaller than the volume of the ink drawn by the printer, so that the inside of the ink cartridge is always in a negative pressure state. Because the constant pressure chamber 5 of the ink cartridge body and the ink storage chamber 1 are separated by a lace, the specific gravity of the air is smaller than that of the ink, and the air can directly enter the ink storage chamber 1 from the constant pressure chamber 5, while the ink in the constant pressure chamber 5 will not enter. Ink chamber. As the ink in the ink storage chamber 1 is consumed, the ink in the constant pressure chamber 5 does not decrease all the time, and the ink can always cover the porous material 6, ensuring that the negative pressure inside the ink cartridge is in a constant state, and as long as the porous material is covered with ink Material 6 can ensure constant negative pressure in the ink cartridge, and the ink in the constant pressure chamber 5 does not need a lot, which reduces the residual amount of the ink cartridge and can ensure the printing quality of the ink cartridge well.

Claims (4)

1, a kind of print cartridge that is used for ink-jet printer, comprise the ink storage chamber that is used to store ink, keep the air admission hole of air pressure balance with external environment condition, to the ink outlet port and the negative pressure mechanism of the printhead ink supply of printer, it is characterized in that, described negative pressure mechanism comprises air duct and is arranged at the constant voltage chamber of ink storage chamber bottom, air duct one end is connected with air admission hole, the other end communicates with the constant voltage chamber, and constant voltage is provided with porous material in the chamber.

2, the print cartridge that is used for ink-jet printer as claimed in claim 1 is characterized in that, described porous material is the porous material of filter screen class.

3, the print cartridge that is used for ink-jet printer as claimed in claim 1 is characterized in that, described air duct is set to labyrinth type near the air inlet nose end.

4, the print cartridge that is used for ink-jet printer as claimed in claim 1 is characterized in that, the end that described air duct communicates with the constant voltage chamber is positioned at the bottom in constant voltage chamber.

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