CN1403290A - Cartridges with negative pressure regulation mechanism - Google Patents

Abstract

The invention discloses an ink box with a negative pressure adjusting mechanism. The negative pressure regulating mechanism is a linkage device composed of a damping device and a piston, is arranged between the first ink supply chamber and the second ink supply chamber and is used as a valve for communicating the first ink supply chamber with the second ink supply chamber. When the second ink supply chamber supplies ink, the internal pressure is reduced, so that the negative pressure adjusting mechanism moves to communicate the first ink supply chamber and the second ink supply chamber, and the ink in the first ink supply chamber can be stably supplemented into the second ink supply chamber.

Description

Cartridges with negative pressure regulation mechanism

technical field

The present invention relates to an ink box, more specifically, to an ink box provided with a negative pressure regulating mechanism between a first ink supply chamber and a second ink supply chamber.

Background technique

In the era of information explosion and widespread use of computer systems, not only the frequency of use of the computer itself has increased significantly, but also its quality and processing speed are also subject to strict requirements. However, what is more urgent is that auxiliary facilities that match computers are also affected by this trend. Not only are various auxiliary facilities being introduced one after another, but also the requirements for functionality and quality are increasing day by day. Among all common computer auxiliary equipment, the most common and most common is the printer, and the printer has become an indispensable auxiliary equipment for all computer users.

From the history of the evolution of printers on the market, they can be classified into three types according to general usage: early dot matrix printers, later inkjet printers, and finally laser printers. Among them, although the dot matrix printer is cheap, its printing speed is slow and the printing quality is not good, so that it cannot compete with inkjet and laser printers in the market. Most of the inkjet printers and laser printers are used on the market now. These two printers have their own advantages and disadvantages in comparison. Second, the print quality of inkjet printers is low, while the print quality of laser printers is high, which is the advantage of laser printers.

Compared with laser printers, inkjet printers have a price advantage, but their printing quality is relatively poor, which often makes them gradually lose their competitiveness in occasions that require high printing quality. Generally speaking, inkjet printers not only have the disadvantage of ink diffusion, but also because they use fluid as printing material, many natural defects of the fluid itself also become the cause of poor printing quality, for example, the unfixability of the fluid form ( nonrigid body), the flow is not smooth, the fluid contains bubbles, the viscosity coefficient of the fluid is too small, and the flow direction is not easy to control, etc., which will affect the printing quality.

The ink cartridge of the ink-jet printer is directly filled with ink inside it at the earliest, that is, only a kind of substance of ink is held in the container space of the ink cartridge, and there is no other substance. Later, because this technology almost completely exposed the shortcomings of the above-mentioned inkjet printers, that is, the disadvantages derived from the uncontrollable fluid. Afterwards, new designs continued to appear and improve in response to this shortcoming, but they could not completely rule out the natural behavior mode that the fluid is difficult to control. The following briefly describes the structure of the existing ink cartridge in detail:

1. Known technology (1)

As mentioned above, the ink cartridge of an inkjet printer is the first to directly fill and fill the inner space with ink, as shown in Figure 1. Figure 1 shows a schematic structural diagram of a simple ink cartridge, where N represents the inkjet head, That is, the ink is ejected from here, and S1 represents the space of the ink cartridge for containing the ink, that is, the place for filling the ink.

The ink cartridge of this known technology is simple and convenient in structure, and cost is low, yet this kind of technology all exposes the shortcoming of above-mentioned fluid. The ink cartridge of this structure can only be provided with an ink supply hole at the bottom of the ink cartridge (that is, at the ink jet head) because its inkjet head is located below, and the ink can be made to flow down by gravity, so that the ink in the ink cartridge will leak downward. the trend of. In order to prevent the ink from flowing downward in this structure, the only way to prevent the ink from leaking is to rely on the "surface tension" of the ink to achieve a force balance between the surface tension of the ink at the inkjet head and the hydraulic pressure.

However, the surface tension of the liquid is not large, so if you want to bear the hydraulic pressure of the ink at the inkjet head by means of the surface tension, you must have a certain impact on the depth and diameter of the inkjet hole, the viscosity coefficient of the ink, the surface tension, and the weight of the remaining ink. And height and other factors to be designed, through precise calculation to select the parameters used in order to achieve the best level.

However, because the surface tension of the liquid is too small, its influence in the force balance equation is very small compared to other factors. Any change in any of the above factors may break the force balance and cause the surface of the liquid to The tension cannot withstand the hydraulic pressure and cause ink leakage. In this particular case, all factors that may affect the force balance need to be precisely designed and controlled during the continuous use of the ink. However, there are many factors that affect its change and are difficult to control. Factors such as hydraulic pressure, temperature, ink composition, and viscosity coefficient affected by solution impurities, surface tension, air pressure in the ink cartridge, and local atmospheric pressure are not only difficult to control, but also have far greater influence in the force balance equation than the fluid surface Due to the influence of tension, a small change in any one of the factors will easily break the force balance equation. This kind of precision fluid mechanical control technology is not only expensive, but also difficult to achieve.

2. Known technology (2)

As shown in FIG. 2 , the known technique (1) is improved, and an absorbing material S2 (such as a sponge) is placed in the structural space of the ink cartridge. Although this improved ink cartridge can make up for the lack of ink leakage relative to the known technology (1), it cannot completely use up all the disadvantages of filling its internal ink.

As shown in Figure 2, when the ink cartridge is filled with a sponge, due to the strong adsorption force of the sponge, the ink can be tightly adsorbed in the ink cartridge and prevent the ink from leaking outward, so as to reduce the burden of surface tension in this respect. Therefore, in the force balance equation, the force to prevent ink leakage is not only the surface tension of the ink, but also increases the adsorption force of the sponge, and the calculation degree of the adsorption force of the sponge is greater than the surface tension of the ink, so , in the known technology (1), many factors that are sufficient to affect the balance and are difficult to control will not easily destroy the force balance even if there are relatively large changes. In this case, the absorption force provided by the sponge can prevent the ink in the ink cartridge from leaking easily, thereby avoiding the occurrence of ink leakage.

However, due to the limited capacity in the ink cartridge, there is less room for ink to be filled after the sponge is filled. Furthermore, since water-absorbing materials such as sponges have adsorption force, when the ink is about to run out, some ink will be retained in the ink cartridge because its gravity cannot overcome the absorption force of the sponge, resulting in the problem of wasting ink. For example, the space that can be filled with 40 grams of ink originally is partially occupied after being loaded into the sponge, so it can only be filled with about 30 grams of ink, but the 30 grams of ink will be about 6 to 7 grams due to the adsorption force of the sponge. It cannot be used, so 40 grams of ink can be used in theory, but in fact only about 23 to 24 grams can be used, which is a pity in terms of space and ink utilization.

In addition, poor ink supply is also a deficiency of this technology. Because the sponge not only has adsorption force, but also because of its loose tissue structure, not only ink but also air will be absorbed. Therefore, while the sponge is supplying ink to the ink cartridge, there will be large and small air bubbles left in it. If the air bubbles cannot be discharged smoothly, the ink supply will not be smooth when encountering air bubbles during printing, resulting in printing interruption or printing color shades. , resulting in reduced print quality.

Finally, this technology wants to place the sponge in the ink cartridge, and the sponge is closely related to the characteristics of the ink, which leads to a complicated production process and difficult quality control, which leads to difficulties in production technology and a substantial increase in cost.

Although this technology can improve the lack of ink leakage, but because the space of the ink cartridge and all the filled ink cannot be fully utilized, the printing quality is reduced and the production process is complicated, which has become the biggest drawback of this technology.

3. Known technology (3)

Although the known technology (one) can make full use of the space of the ink cartridge and the ink filled, there will be the shortcoming of ink leakage; although the known technology (two) does not have the shortcoming of ink leakage, it cannot make full use of the space of the ink cartridge and the filled ink. ink, so there are pros and cons to both. This technology is formed by improving the lack of the aforementioned known technologies (1) and (2), combining the technologies of the two, and achieving a balance between the above two.

As shown in Figure 3, this technology divides the space in the ink cartridge into two parts S31 and S32, wherein, the S31 part adopts the mode of the known technology (1), and the S32 adopts the mode of the known technology (2), that is to say, The space of S31 is only used to fill ink, while the space of S32 is filled with water-absorbing materials such as sponges in addition to ink.

S31 is only used for filling the ink, and the result of not inserting the sponge is to extract the advantages of the known technology (1) and get rid of the shortcoming of the known technology (2). N is not directly connected, which further eliminates the disadvantages of the known technology (1) and captures the advantages of the known technology (2). In other words, since the S31 is not filled with a sponge, it can achieve the advantages of fully utilizing the space and filling its interior with ink. In addition, since the space of S31 is not directly connected to the inkjet head N, the disadvantage of ink leakage does not occur.

And S32 is also filled with sponge except that ink is arranged in its interior, and its structural position is directly connected with ink-jet head N, thus it has captured the advantage of known technology (two), got rid of known technology (one) )Shortcomings. In other words, since S32 is filled with sponge and its structural position is directly connected with the inkjet head N, ink leakage can be avoided.

This technology combines the advantages of the above two known technologies to achieve a balance point, but the ink cartridge with this structure must have shortcomings. That is, in order to avoid ink leakage, the filling amount of the sponge is more or less, and it is impossible to have no at all, but as long as there is a sponge, it will definitely occur that the ink cartridge space and the ink filled in it will not be fully utilized in the known technology (two). . In addition, in order to avoid ink leakage, the filling area of the sponge must be connected to the inkjet head N. Because of this, the air bubbles in the sponge will cause the ink supply to be unsmooth, and there will be fine white lines, thereby reducing the printing quality. .

Above-mentioned three known technologies also have an insurmountable common shortcoming except having the deficiency that has been explained. Because the ink cartridge is gradually used up in the process of ink, due to the gradual consumption of ink, the ink level gradually decreases, and the upper end of the ink cartridge will gradually leave a space. If this space is kept as a vacuum part (control mass system), the gas (air) ) cannot be supplemented, according to the ideal gas equation:

PV＝nRT (1)

where P: pressure

V: volume

n: number of moles of gas

R: gas constant

T: temperature

At this time, the total number of moles of gas (n), gas constant (R) and temperature (T) are kept constant, while the volume (V) of the vacuum part (control mass system) will gradually increase during the gradual use of the ink , according to the above equation (1), the pressure (P) of the gas will gradually decrease at this time.

From the above deduction, it can be seen that in the process of gradually using up the ink, the gas pressure in the space above the ink cartridge will gradually decrease. In other words, the pressure in the space is less than one atmospheric pressure (negative pressure). Small, resulting in an increasing pressure difference between the space and the outside world (one atmosphere). In the force balance equation, the pressure difference (the external pressure is greater than the internal pressure) will prevent the ink from flowing downward. In other words, the greater the pressure difference, the greater the suction force on the ink, and the less likely the ink will flow out.

Because inkjet printers have the disadvantage of ink leakage, the suction force generated by the external pressure greater than the internal pressure can increase the force to prevent ink leakage. However, if there is no gas in the space above the ink cartridge (that is, maintain control mass), the space As a result of the increasing pressure difference with the outside world, the ink cannot be completely flowed out, making the ink cartridge unusable.

Therefore, it is indispensable to replenish the space above the ink cartridge with gas. However, in order not to increase the pressure in the space to the same as the external pressure, and keep the negative pressure inside, when the external gas enters the space Resistance must be provided, and this resistance is just equal to the difference between the external pressure and the pressure in this space. For example, the known technology (3) is provided with a small hole H31 on the upper end of the ink cartridge space S32, by means of the small hole H31, the outside air enters into the S32, then passes through H32 and S31, and reaches S33 to increase its pressure. The ink and sponge in the S31, as well as the ink in the S31, become the resistance between the internal and external pressure difference required by the designer.

However, in order to maintain this resistance to maintain the pressure difference between the inside and outside required by the designer, the speed at which the gas enters the ink cartridge from the outside cannot change too quickly. In this way, when the printing work increases, a large amount of ink is consumed at the same time, and the ink level in the ink cartridge drops rapidly at this time. In this case, due to the rapid consumption of ink, the internal space increases rapidly at the same time. Under the premise of being inversely proportional, the internal pressure decreases rapidly at the same time. At this time, due to the resistance effect of air entering the ink cartridge, the outside air cannot quickly replenish its interior and reduce the pressure rapidly. At this time, the internal and external pressure difference will increase enough to prevent the ink from flowing out or make it flow out smoothly, resulting in Printing is interrupted or printing ink is not dense enough, resulting in poor print quality.

From the above, it can be seen that all current ink cartridges either have the disadvantage of ink leakage, or cannot make full use of the space of the ink cartridge and the ink filled inside, or the printing is interrupted and the printing quality is reduced due to poor ink supply. In addition, in order to maintain the internal and external pressure difference required by the designer, resistance is provided when the gas enters the ink cartridge. Although this method can effectively maintain the internal and external pressure difference required by the designer, the replenishment of the gas becomes slow, resulting in When printing in large quantities, the ink is consumed in large quantities, and the pressure difference between the inside and outside increases rapidly at the same time, and the slowly replenished gas cannot replenish the internal pressure, which makes it difficult for the ink to flow out and reduces the printing quality.

There are drawbacks in the above-mentioned known technologies, and further ink cartridges are required to be produced so as to replace the ink cartridges in the known technology and enhance its market competitiveness.

Contents of the invention

For this reason, the ink cartridge among the present invention is mainly in order to solve above-mentioned ink cartridge and can't solve the problems of ink leakage and ink cartridge space and ink usage rate not high.

In the present invention, the ink cartridge with the negative pressure regulating mechanism is mainly composed of the first ink supply chamber, the second ink supply chamber and the regulating mechanism. Wherein, the second ink supply chamber is formed with an ink supply port communicated with the outside air, and the ink outlet is made by means of the ink supply port; The regulating mechanism acts as a valve between the first ink supply chamber and the second ink supply chamber. The adjustment mechanism is composed of a piston and a damping device. With the help of the reduction of the internal pressure of the second ink supply chamber during the ink supply process, the piston slides to the inner side of the second ink supply chamber, and the first ink supply chamber is placed on the piston. A flow passage is provided between the chamber and the second ink supply chamber. When the piston slides inward, the first ink supply chamber and the second ink supply chamber are connected by means of the flow passage, so that the ink in the first ink supply chamber passes through the flow passage. Flow into the second ink supply chamber.

In the ink cartridge with negative pressure regulating mechanism in the present invention, after the ink is replenished in the second ink supply chamber, its internal pressure increases, and at the same time, the piston is pushed outward, and the internal pressure decreases again after the ink supply port ejects ink. Push the piston inward again to make the flow passage open. The situation of the above-mentioned piston movement is not significant, only slightly sliding, so that the first ink supply chamber and the second ink supply chamber are kept between the conduction state and the critical conduction state, with the help of atmospheric pressure, the resistance of the damping device and the second The negative pressure of the ink supply chamber tends to maintain a balance among the three, so that the second ink supply chamber maintains a stable ink supply negative pressure.

The ink box with the negative pressure regulating mechanism in the present invention improves all the drawbacks of the aforementioned known technologies and improves the printing quality of the inkjet printer.

Description of drawings

The advantages and features of the ink cartridge with negative pressure regulating mechanism in the present invention will be described in detail below with reference to the accompanying drawings.

Fig. 1 is the structural representation of known ink cartridge (1);

Fig. 2 is the structural representation of known ink cartridge (two);

Fig. 3 is the structural representation of known ink cartridge (3);

Fig. 4 is a schematic structural view of Embodiment 1 of the ink cartridge in the present invention;

Fig. 5 is the structural representation of the second embodiment of the ink cartridge in the present invention;

Fig. 6 is a schematic structural view of Embodiment 3 of the ink cartridge in the present invention;

Figure 7 is a schematic structural view of Embodiment 4 of the ink cartridge in the present invention;

Figure 8 is a schematic structural view of Embodiment 5 of the ink cartridge in the present invention;

Fig. 9 is a schematic structural view of Embodiment 6 of the ink cartridge in the present invention;

Figure 10 is a schematic structural view of Embodiment 8 of the ink cartridge in the present invention;

Fig. 12 is a schematic structural view of Embodiment 7 of the ink cartridge in the present invention;

Fig. 11 is a schematic structural view of Embodiment 9 of the ink cartridge in the present invention.

Detailed ways

As shown in FIG. 4 , the ink cartridge 1 of the present invention is mainly composed of a first ink supply chamber 11 , a second ink supply chamber 12 and a negative pressure regulating mechanism 13 . Wherein, an air hole 110 is provided on the top of the first ink supply chamber 11, so that the pressure in the first ink supply chamber 11 is an atmospheric pressure (1 atm); an ink supply port 121 is provided on the bottom of the second ink supply chamber 12 , as the outlet of the ink cartridge 1, and form a passage communicating with the outside air; the negative pressure regulating mechanism 13 is arranged in the passage inside the second ink supply chamber 12, and one side of the passage communicates with the atmosphere and forms an open space . The adjusting mechanism 13 is used as a valve between the first ink supply chamber 11 and the second ink supply chamber 12 , and when the ink cartridge 1 is not in use, the adjusting mechanism 13 is in the position shown in FIG. 4 .

The adjustment mechanism 13 is a linkage device composed of a piston 131 and a damping device 132. With the help of the internal pressure drop of the second ink supply chamber 12 during the ink supply process, the piston 131 slides to the inside of the second ink supply chamber 12. Piston 131 is provided with flow channel 133 inside it, when piston 131 slides inwardly, the first ink supply chamber 11 and the second ink supply chamber 12 are conducted by means of flow channel 133, and by means of blocking block 134 to abut against the piston 131 to prevent the piston 131 and the flow channel 133 from being unable to communicate with the first ink supply chamber 11 and the second ink supply chamber 12 due to too much penetration into the second ink supply chamber 12 . Using the adjustment mechanism 13, the ink cartridge 1 can stably flow the ink in the first ink supply chamber 11 into the second ink supply chamber 12 through the flow channel 133 during the ink supply process. At this time, the piston 131 and the flow channel 133 process The position indicated by the dotted line.

In the present invention, after the second ink supply chamber 12 of the ink cartridge 1 obtains the ink that enters from the flow channel 133, its internal pressure increases, and the piston 131 is pushed outward at the same time. At this time, the flow channel 133 is closed, and the first ink supply chamber 11 is cut off. ink supply process. Thereafter, after the ink supply port 121 ejects ink, the internal pressure drops again, and the piston 131 is pushed inward again, and the flow channel 133 leads to the first ink supply chamber 11 and the second ink supply chamber 12. The amount of movement of 131 is not large, and only some of them slide slightly, so that the first ink supply chamber 11 and the second ink supply chamber 12 are always kept between the conduction state and the critical conduction state, and the resistance of the damping device and the atmospheric pressure 1. Friction force and the negative pressure of the second ink supply chamber tend to maintain a balance, and a stable negative pressure of ink supply can be maintained in the second ink supply chamber 12 .

As shown in FIG. 4 again, the damping device 132 in the first embodiment of the present invention is a tension spring, one end of the tension spring is fixed on the inner wall of the ink cartridge, and the other end is fixed on the piston 131 . When the piston 131 slides towards the second ink supply chamber 12, the tension spring is stretched and deformed due to tension, and the tension spring provides tension to the piston 131 by virtue of the elastic recovery force of the tension spring. In the state that the second ink supply chamber 12 has not ejected ink, the gas volume V ₁ in the second ink supply chamber 12 is a closed space, and the pressure is P ₁ , and the gas volume becomes larger as the amount of ink decreases after ink ejection is V ₂ , and the air pressure value drops to P ₂ , in order to satisfy Bohr's law, it can be expressed by the following equation:

P ₁ V ₁ =P ₂ V ₂

At this time, a pressure difference is formed inside and outside the ink cartridge 1, so that the piston 131 slides inward, communicates the first ink supply chamber 11 and the second ink supply chamber 12 by means of the flow channel 133, and abuts against the piston by means of the blocking block 134 131 , the ink in the first ink supply chamber 11 flows into the second ink supply chamber 12 through the channel 133 . At this time, the first ink supply chamber 11 and the second ink supply chamber 12 are maintained between the conduction state and the critical conduction state. There is a tendency to maintain a balance between them, and a stable negative pressure is maintained in the second ink supply chamber 12 .

As shown in Figure 5, the regulating body structure 13 in the second specific embodiment of the present invention is a piston 131 made of elastic material such as rubber, and the blocking block 134 is an inclined-plane anti-sliding block, so that the second ink supply chamber 12 The channel gradually narrows. During the ink supply process of the second ink supply chamber 12, due to the decrease of the internal pressure, a pressure difference between the inside and the outside is formed, so that the elastic rubber piston slides to the inside of the second ink supply chamber 12, and the first ink supply chamber is connected by means of the flow channel 133. The ink chamber 11 and the second ink supply chamber 12 allow the ink in the first ink supply chamber 11 to flow into the second ink supply chamber 12 through the flow channel 133. At this time, the elastic rubber piston 131 and the flow channel 133 appear as shown in Figure 5 The position indicated by the dotted line. The ink cartridge 1 replaces the pulling force generated by the tension spring in the first embodiment with the help of the elastic restoring force generated by the deformation of the elastic rubber piston 131 when it contacts the blocking block 134, so that the first ink supply chamber 11 and the second ink supply chamber 12 It is always kept between the conduction state and the critical conduction state, and with the help of the atmospheric pressure, the elastic recovery force of the elastic rubber piston, the friction force and the negative pressure of the second ink supply chamber to maintain balance, in the second ink supply chamber A stable ink supply negative pressure is maintained in the ink chamber 12 .

As shown in Fig. 6 and Fig. 4, the third specific implementation of the present invention is to replace the tension spring in the first embodiment with a thrust spring. Compression deformation, using the elastic restoring force of the thrust spring to provide thrust to the piston 131 . During the ink supply process of the ink cartridge 1, the first ink supply chamber 11 and the second ink supply chamber 12 are always maintained between the conduction state and the critical conduction state. The negative pressure of the second ink supply chamber and the four want to maintain a balanced tendency, and a stable ink supply negative pressure is maintained in the second ink supply chamber 12 .

As shown in Fig. 7 and Fig. 4, the concrete embodiment 4 of ink cartridge 1 among the present invention is to change the damping device 132 among the embodiment 1 into a tension spring and an airtight air bag 135 that one end is fixed, and this tension spring is connected with the airtight air bag 135 is arranged in the second ink supply chamber 12. In this embodiment, the open space on the side of the adjustment mechanism 13 is implemented to be closed, and this space is communicated with the second ink supply chamber 12, so that the atmospheric pressure is controlled by the airtight air bag 135. internal pressure instead. In the state that the second ink supply chamber 12 has not ejected ink, the gas volume V ₃ in the air bag 135 is a closed space, and the pressure is P ₃ , the ink volume of the second ink supply chamber 12 is ejected along with the ink ejection port 121 decrease, so that the volume of the air bag 135 becomes V ₄ , and the air pressure value drops to P ₄ , in order to satisfy Bohr’s law, it can be expressed by the following equation

P ₃ V ₃ =P ₄ V ₄

During the ink supply process of the ink cartridge 1, due to the expansion of the air bag 135, the expansion force gradually increases, thereby pushing the displacement of the piston 131, the tension spring is stretched, and the tension gradually increases, and the second ink supply chamber 12 is supplemented by the second ink supply chamber 12. The ink in the first ink supply chamber 11 increases its internal pressure, so that the first ink supply chamber 11 and the second ink supply chamber 12 are always maintained between the conduction state and the critical conduction state, and by means of the expansion force of the air bag 135 , the pulling force of the tension spring, the frictional force and the negative pressure of the second ink supply chamber tend to maintain a balance, and a stable negative pressure is maintained in the second ink supply chamber 12 .

As shown in Fig. 8 and Fig. 5, the specific embodiment five of the ink cartridge 1 among the present invention is that the side open space of the regulating mechanism 13 of the second specific embodiment of the present invention is closed, so that this space is connected with the second ink supply chamber 12 is connected, and the atmospheric pressure is replaced by an airtight bag 135. During the ink supply process of the ink cartridge 1, the first ink supply chamber 11 and the second ink supply chamber 12 are always maintained between the conduction state and the critical conduction state, and the expansion force of the airtight air bag 135, the elastic rubber piston The elastic recovery force, frictional force and the negative pressure of the second ink supply chamber tend to maintain balance, and a stable negative pressure is maintained in the second ink supply chamber 12.

As shown in Figure 9 and Figure 6, the specific embodiment six of the ink cartridge 1 among the present invention is to close the open space on the side of the adjustment mechanism 13 in the third specific embodiment of the present invention, so that this space is connected with the second ink supply chamber 12 Connected, and the atmospheric pressure is replaced by an airtight bag 135. During the ink supply process of the ink cartridge 1, the first ink supply chamber 11 and the second ink supply chamber 12 are always maintained between the conduction state and the critical conduction state, and the expansion force of the airtight air bag 135 and the force of the thrust spring Thrust force, frictional force and the negative pressure of the second ink supply chamber tend to maintain balance, and a stable negative pressure is maintained in the second ink supply chamber 12 .

As shown in Fig. 10 and Fig. 7, the specific embodiment seven of the ink cartridge 1 of the present invention, the adjustment mechanism 13 is an elastic rubber piston, one end is a fixed end, and the other end is a stretching end that can be stretched freely. When opened for use, the elastic rubber piston is in the state shown in Figure 10. By virtue of the reduction of the internal pressure of the second ink supply chamber 12 during the ink supply process, the free end of the elastic rubber piston is stretched by pulling force, and extends to the inside of the second ink supply chamber 12, and the elastic rubber piston has a The flow channel 133 communicates the first ink supply chamber 11 and the second ink supply chamber 12 by means of the flow channel 133 when the piston slides inward, and the ink in the first ink supply chamber 11 is made The ink flows into the second ink supply chamber 12 through the flow channel 133 , and at this moment, the piston and the flow channel 133 are in the position shown by the dotted line in FIG. 10 .

As shown in Figure 11, in the eighth embodiment of the ink cartridge 1 in the present invention, the adjustment mechanism 13 is an elastic rubber piston, the right end of which is a fixed end, and the left end is a compressible free end. The piston handles the state shown by the solid line in Figure 11. With the help of the reduction of the internal pressure during the ink supply process in the second ink supply chamber 12, the pressure on both sides of the elastic rubber piston is unequal, and the pressure on the left side of the elastic rubber piston is further increased to produce rightward compression deformation, and to the second The inner side of the two ink supply chambers 12 moves, and the piston is provided with a channel 133. When the piston retracts to the right, the first ink supply chamber 11 and the second ink supply chamber 12 are connected through the flow channel 133, so that the first ink supply chamber The ink in 11 flows into the second ink supply chamber 12 through the flow channel 133 , and at this moment, the piston and the flow channel 133 assume the position shown by the dotted line in FIG. 11 . In the process of the second ink supply chamber 12 sucking ink, due to the gradual increase of its internal pressure, an elastic restoring force is provided to the piston, so that the piston returns to the initial position shown by the solid line in Figure 11, or returns to an approximate state and stop the ink supply.

In the seventh and eighth embodiments of the present invention, the preferred material of the piston is foam. In the eighth embodiment, the right side of the foam is not necessarily fixed, and a blocking block 134 may be further provided so that the distance between it and the right side wall of the ink cartridge 1 is equal to the length of the foam when no external force is applied. With the help of the reduction of the internal pressure during the ink supply process of the second ink supply chamber 12, the pressure on the left side of the foam is greater than the pressure on the right side, resulting in compression deformation to the right, and shrinking inward to the second ink supply chamber 12, and Since the piston is provided with a flow channel 133, the first ink supply chamber 11 and the second ink supply chamber 12 are connected by means of the flow channel 133 when the piston retracts to the right. When the second ink supply chamber 12 is replenished with ink, a restoring force is provided to the foam to expand and return to the left, and the block 134 is used to stop the foam to prevent the foam from expanding and sliding to the left.

As shown in Figure 12, in the ninth embodiment of the present invention, a flow channel 137 is provided between the first ink supply chamber and the second ink supply chamber 12, and the adjustment mechanism 13 is arranged in the second ink supply chamber 12, which includes There is an airtight air bag 135 and an L-shaped connecting rod 136. Wherein, one end of the L-shaped connecting rod 136 is pivotally fixed, and the other end is a free end that can rotate freely; the airtight air bag 135 is arranged in the area surrounded by the L-shaped connecting rod 136 . When the ink cartridge 1 is not opened for use, the air bag 135 and the L-shaped connecting rod 136 are in the position shown by the solid line in FIG. 12 , and the flow channel 137 is closed. Due to the reduction of the internal pressure of the second ink supply chamber 12 during the ink supply process, the air bag 135 is expanded, and the connecting rod 136 is further rotated around the axis, and the closed part of the flow channel 137 is opened, and the flow channel 137 guides Through the first ink supply chamber 11 and the second ink supply chamber 12, the ink in the first ink supply chamber 11 flows into the second ink supply chamber 12 through the flow channel 137. At this time, the air bag 135 and the connecting rod 136 are processed as The location indicated by the dotted line in Figure 12. When the second ink supply chamber 12 is supplemented with a proper amount of ink, the internal pressure of the second ink supply chamber 12 increases, which makes the volume of the air bag 135 compressed, so that the speed lever 136 returns to the closed state.

To sum up, the ink cartridge 1 of the present invention does not have water-absorbing materials such as sponges inside, so the space inside the ink cartridge can be fully utilized to increase the amount of ink and the amount of ink used. In addition, during the ink supply process of the ink, especially when printing a large amount, the pressure inside the ink cartridge decreases rapidly, resulting in an excessive pressure difference between the inside and outside, so that the ink is subjected to strong suction and is not easy to flow out. The ink cartridge in the present invention can be adjusted through the adjustment mechanism. Raise the liquid level height of the second ink supply chamber, increase the internal pressure of the second ink supply chamber (both gas pressure and ink hydraulic pressure increase), so as to quickly reach a balance, maintain the internal and external pressure of the ink cartridge, eliminate ink supply irregularities, and achieve improvement at the same time print quality features.

Claims (21)

1. An ink cartridge, having a first ink supply chamber and a second ink supply chamber communicated with each other, is characterized in that: the second ink supply chamber is provided with a passage communicating with the outside air, and in the passage is provided Negative pressure adjustment mechanism, the negative pressure adjustment mechanism includes: a piston capable of closing the second ink supply chamber, the piston is located in the channel, and the first ink supply chamber and the second ink supply chamber can be closed and communicated with by the piston; A damping device capable of providing resistance to the piston is provided inside the passage. 2. An ink cartridge, having a first ink supply chamber and a second ink supply chamber communicated with each other, characterized in that: the second ink supply chamber is provided with a passage inside it, and a negative pressure is provided inside the passage Regulating mechanism, the negative pressure regulating mechanism includes: a piston capable of closing and communicating with the first ink supply chamber and the second ink supply chamber, the piston is located inside the channel and can move within the channel; A closed air bag capable of providing expansion force to the piston, the airtight bag is arranged inside the passage; A damping device capable of providing resistance to the piston is provided inside the passage. 3. The ink cartridge according to claim 1 or 2, characterized in that: the first ink supply chamber is provided with a hole directly communicating with the outside atmosphere. 4. The ink cartridge according to claim 1 or 2, characterized in that: the piston has a flow channel inside it that can communicate with the first ink supply chamber and the second ink supply chamber. 5. The ink cartridge according to claim 4, wherein the aforementioned damping device is a spring, one end of which is fixed on the inner wall of the ink cartridge, and the other end is fixed on the aforementioned piston. 6. The ink cartridge according to claim 5, wherein a blocking block capable of blocking the displacement of the piston in the passage is provided on the inner wall of the passage. 7. The ink cartridge according to claim 4, wherein the damping device is an anti-slip block on an inclined plane, and the anti-slip block on an inclined plane is arranged on the inner wall of the passage. 8. The ink cartridge according to claim 7, wherein the piston is an elastic rubber piston, and the piston will elastically deform when contacting the anti-sliding block on the inclined surface in the passage. 9. An ink cartridge, having a first ink supply chamber and a second ink supply chamber communicated with each other, characterized in that: the second ink supply chamber is provided with a channel inside, and a can be arranged in the channel An adjustment mechanism for adjusting the negative pressure inside the second ink supply chamber, the adjustment mechanism includes a piston made of elastic material, and one end of the piston is fixed in the passage. 10. An ink cartridge, having a first ink supply chamber and a second ink supply chamber communicated with each other, characterized in that: the second ink supply chamber is provided with a channel communicating with the outside atmosphere inside, and in the channel An adjustment mechanism capable of adjusting the negative pressure inside the second ink supply chamber is provided inside, and the adjustment mechanism includes a piston made of elastic material, one end of which is fixed in the aforementioned channel. 11. The ink cartridge according to claim 9 or 10, wherein the first ink supply chamber is provided with an air hole directly communicating with the outside air. 12. The ink cartridge according to claim 9 or 10, wherein the piston is provided with a flow channel capable of communicating with the first ink supply chamber and the second ink supply chamber. 13. The ink cartridge according to claim 11, wherein the piston is provided with a flow channel capable of communicating with the first ink supply chamber and the second ink supply chamber. 14. The ink cartridge according to claim 9, characterized in that: the aforementioned piston is an elastic rubber piston, and the elastic rubber piston will be stretched and deformed by the negative pressure of the second ink supply chamber, so that the aforementioned two ink supply chambers can be opened. room. 15. The ink cartridge according to claim 10, wherein the aforementioned piston is an elastic rubber piston, and the elastic rubber piston is compressed and deformed by the negative pressure of the aforementioned second ink supply chamber to open the aforementioned two ink supply chambers. room. 16. The ink cartridge according to claim 14, wherein a blocking block is provided on the inner wall of the passage, and the blocking block can block the displacement of the piston in the passage. 17. The ink cartridge according to claim 15, wherein a blocking block is provided on the inner wall of the passage, and the blocking block can block the displacement of the piston in the passage. 18. An ink cartridge with a first ink supply chamber and a second ink supply chamber communicated with each other, characterized in that: a flow passage is provided between the two ink supply chambers, and an adjustment mechanism is provided inside it, the adjustment The mechanism includes a connecting rod pivotally connected with the second ink supply chamber, and an airtight air bag arranged in the second ink supply chamber and capable of exerting expansion force on the connecting rod. 19. The ink cartridge according to claim 18, wherein the first ink supply chamber is provided with an air hole directly communicating with the outside atmosphere. 20. The ink cartridge according to claim 19, wherein the connecting rod is an L-shaped connecting rod, one end of which is pivotally fixed, and the other end is capable of opening and closing the aforementioned flow channel and communicates with the two ink supply chambers. 21. The ink cartridge according to claim 1 or 2 or 9 or 10 or 18, wherein the second ink supply chamber is provided with an ink supply port.

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