Inkjet printer cartridge

Abstract

The present invention relates to the technical field of inkjet printing equipment, and in particular to an inkjet printer cartridge, comprising an ink storage component, an ink guide component and a nozzle component; the ink storage component is arranged in a cartridge body; the ink guide component is connected to the ink storage component; the nozzle component comprises an inkjet part and a sealing component; one end of the inkjet part is connected to an ink guide channel, and the other end is connected to a reflux channel, and the sealing component is connected to the inkjet part; by arranging an "L"-shaped sealing slider, when the printer is turned on, the heat preheated by a heating element is used to drive the sealing slider to open the nozzle, and the nozzle will be automatically closed when the printer is not in use, and when the nozzle is closed, a circulating flow path will be formed in the ink cartridge to ensure that the ink is in a slow-flowing state and avoid deposition; the problem of blockage caused by ink deposition and drying at the nozzle position when not printing for a long time and chip wear caused by frequent disassembly and assembly of the seal to avoid drying is solved.

Description

Technical Field

[0001] The invention relates to the technical field of inkjet printing equipment, and in particular to an inkjet printer cartridge. Background Art

[0002] An inkjet printer is a printing device that generates bubbles by heating electronic components or uses vibration to spray ink droplets onto paper to form text or images. Inkjet printers are mainly divided into cartridge type and ink tank type. The ink of a cartridge type printer is mainly stored in the ink cartridge. Generally, the ink cartridge is directly replaced or ink is injected into the ink cartridge after the ink is used up. Ink tank type printers are continuously used by injecting ink into the ink tank after the ink is used up.

[0003] At present, ink cartridge printers usually design the print head and ink cartridge into an integrated structure. When the nozzle on the print head is blocked, the ink cartridge can be removed and the ink residue that blocks the nozzle can be cleaned out by soaking it in warm water. Compared with the ink tank printer, it is more convenient to disassemble the printer for cleaning; however, the ink of the ink cartridge printer is stored in a sponge, and the ink storage amount is much smaller than that of the ink tank printer. Therefore, compared with the ink tank printer, the ink of the ink cartridge printer is more likely to dry up when it is not printed for a long time, resulting in nozzle blockage, which reduces the printing quality; the prior art has proposed a good solution to this problem, such as a cartridge for preventing blockage with patent publication number CN209634051U, which filters out large particles of waste residue in the ink by setting multiple groups of filtering structures to ensure that there is no waste residue that is easy to cause nozzle blockage in the ink reaching the ink outlet position, and a sealing cover with an ink-soaked sponge sealing column is provided to cover the nozzle after printing is completed to keep the ink outlet position moist and sealed, thereby reducing the evaporation of liquid at the ink outlet and avoiding the blockage of the ink outlet causing the decline in printing quality.

[0004] Although the prior art solves the problem that the nozzle of a cartridge-type inkjet printer will dry up and become clogged when it does not print for a long time, the following problems still exist: although sealing the nozzle of the ink cartridge after printing can effectively slow down the drying speed of the nozzle position, and there is no need to clean the nozzle with warm water after drying, it is still necessary to disassemble and assemble the ink cartridge to handle it. The operation is too cumbersome and cannot fundamentally solve the problem of nozzle drying. At the same time, frequent disassembly of the ink cartridge will cause wear of the ink cartridge chip and the print head, and bubbles will be generated at the nozzle position during the disassembly and installation process, making the ink discharge pressure unstable, further causing a decrease in printing quality; and for a thermal foaming inkjet printer, the ink is pushed out of the nozzle by heating the ink to form bubbles. In order to achieve faster heating speed and higher printing accuracy, the heating element of this type of printer needs to use a smaller space. The smaller the heating element and the more the number, the smaller the caliber of the corresponding nozzle will be and the more the number will be. It is impossible to use a bottle cap-like structure to effectively seal it. At this time, the nozzle position will still dry up and become clogged.

[0005] In view of the above situation, in order to overcome the above technical problems, the present invention designs an inkjet printer cartridge. Summary of the invention

[0006] The present invention provides an ink cartridge for an inkjet printer, which solves the problems of blockage caused by ink deposition and drying at a nozzle position when not printing for a long time, and chip wear caused by frequent disassembly and assembly of the ink cartridge to seal the nozzle to avoid drying. By arranging an "L"-shaped sealing slider, the heat preheated by a heating element is used to drive the sealing slider to open the nozzle when the printer is turned on, and the nozzle is automatically closed when the printer is not in use. When the nozzle is closed, a circulating flow path is formed in the ink cartridge to ensure that the ink is in a slow-flowing state and to avoid deposition. In addition, the ink will be filtered for multiple rounds during the circulation process to ensure that the ink quality will not block the nozzle, thereby improving the printing quality.

[0007] To achieve the above object, the present invention provides the following technical solutions:

[0008] An inkjet printer ink cartridge comprises an ink cartridge chip, a cartridge body and a cartridge cover, and also comprises an ink storage assembly, an ink guide assembly and a nozzle assembly; the ink storage assembly is arranged in the cartridge body; the ink guide assembly comprises an ink guide channel and a reflux channel; the ink guide channel is connected to the lower end of the ink storage assembly; the reflux channel is connected to the upper end of the ink storage assembly; the nozzle assembly comprises an inkjet component and a sealing component; one end of the inkjet component is connected to the ink guide channel, and the other end is connected to the reflux channel. Under the action of gravity, the ink in the ink storage assembly flows from the lower part of the ink storage assembly through the ink guide channel into the inkjet component. When the ink exceeds a set height (i.e., reaches the height where the floating switch is located), the ink flows back to the upper part of the ink storage assembly through the reflux channel; the sealing component is connected to the inkjet component, and when the printer is not started, the sealing component slides to a position to close the inkjet component.

[0009] Preferably, the ink storage assembly includes an ink storage chamber, a filter chamber, a secondary ink chamber and a connecting air pipe; the ink storage chamber is opened at the upper part of the box body; the filter chamber is arranged at the lower part of the ink storage chamber; the secondary ink chamber is arranged below the filter chamber; and the connecting air pipe is connected between the filter chamber and the secondary ink chamber.

[0010] In the above scheme, the ink reaching the nozzle assembly during the printing process will be sprayed out under the action of thermal foaming, and negative pressure will be generated at this time to generate negative pressure on the ink storage assembly, so that the ink in the ink storage chamber will flow into the ink guide assembly through the filter chamber, and the ink passing through the filter chamber will be filtered out of the particles therein to prevent the particles in the ink from clogging the nozzle, and the ink filtered in the filter chamber will enter the secondary ink chamber under the action of gravity, and the ink in the secondary ink chamber will flow into the nozzle assembly. Since the connecting air pipe can balance the air pressure in the two chambers, the ink will flow slowly at this time to avoid the ink at the nozzle position being in a static state for a long time and causing deposition and clogging, and at the same time, the gas in the nozzle assembly can be discharged into the filter chamber and the secondary ink chamber, thereby avoiding the reduction in printing quality due to the failure to empty the gas at the nozzle during printing.

[0011] Preferably, the ink guide channel includes a gravity channel, a connecting channel, a pumping pump and a motor; the gravity channel is connected between the bottom of the filter chamber and the secondary ink chamber; the connecting channel is connected between the secondary ink chamber and the nozzle assembly; the pumping pump is connected to the nozzle assembly; and the motor is connected to the pumping pump.

[0012] In the above scheme, when the ink rises to a certain height, a pumping pump can be used to pump the ink from the secondary ink chamber back into the filter chamber, so that the ink undergoes multiple filtration cycles to increase the filtration effect. The ink can also flow quickly during the pumping process to prevent the deposition of solid particles in the ink.

[0013] Preferably, a floating switch is provided in the secondary ink chamber; the floating switch is electrically connected to the motor.

[0014] In the above scheme, the floating switch will rise and fall with the height of the ink level in the secondary ink chamber. When the liquid level in the secondary ink chamber is higher than the specified height, the motor will be started. At this time, the pumping pump will pump most of the ink in the secondary ink chamber and the nozzle assembly back to the filter chamber. Since the reflux ink enters the filter chamber from the upper part of the filter chamber, it will be filtered again at this time. Before printing, the ink will be filtered multiple times in the filter chamber to ensure that the ink will not clog the nozzle, and when the ink is pumped away, the motor will be turned off, thereby saving power and ensuring that the motor can make the pumping pump work multiple times when not printing for a long time. The use of button batteries can ensure that the pumping pump can work multiple times, saving costs.

[0015] Preferably, the inkjet component includes a circulation chamber, a nozzle, a heating element, a heat conduction plate and an expansion chamber; the circulation chamber is opened on the bottom wall of the box body; the linear array of nozzles is opened through the bottom of the circulation chamber; the linear array of heating elements is arranged on the upper part of the circulation chamber, and each heating element corresponds to a nozzle; the heat conduction plate is arranged above the heating element; the expansion chamber is opened above the circulation chamber, and thermal expansion materials are stored in the expansion chamber.

[0016] In the above scheme, by setting a heat conduction plate, the heating element of the printer will be preheated before printing. During the preheating process, the heat conduction plate will absorb heat from the heating element. At this time, the heat expansion material in the expansion chamber will expand due to the heat, thereby pushing the seal from the sealed nozzle state to the open nozzle state. During the printing process, the temperature of the heating element will rise rapidly to print. At this time, the heat expansion material will keep the seal in an open state under the action of thermal expansion, and normal printing will be performed. When the printing is completed, the heating element stops absorbing heat. At this time, the expansion material in the expansion chamber returns to its original state, and the seal closes the nozzle to ensure that the ink at the nozzle position does not contact the outside air.

[0017] Preferably, the sealing member comprises a sealing slider and a pressure spring; the sealing slider is slidably installed in the expansion chamber, and the sealing slider is an "L"-shaped structure; the pressure spring is connected between the sealing slider and the expansion chamber.

[0018] In the above scheme, the "L"-shaped sealing slider can slide freely and switch the nozzle position under the expansion action of the expansion chamber, thereby preventing the nozzle position from contacting the outside air, thereby extending the drying time; and by sealing the nozzle, the flow chamber can form a closed space, so that the ink will not leak when circulating in the filter chamber and the secondary ink chamber, thereby realizing a sealed circulation.

[0019] Preferably, the diameter of the gravity channel is greater than 0.2 mm and less than 0.5 mm; the diameters of the reflux channel and the connecting channel are both greater than 1 mm.

[0020] In the above scheme, in order to allow the ink to descend under the action of gravity, it is necessary to ensure that the ink can overcome the surface tension. Setting the diameter of the gravity channel to be greater than 0.2mm and less than 0.5mm can ensure that the ink can smoothly enter the secondary ink chamber under the action of gravity while slowing down its flow rate as much as possible. The diameters of the reflux channel and the connecting channel are both greater than 1mm, which can help quickly return to the filter chamber during the pumping process.

[0021] Preferably, a filter layer is provided in the middle of the filter cavity; the filter layer allows particles in the ink with a diameter less than 0.1 mm to pass through.

[0022] In the above scheme, the diameter of particles allowed to pass through the ink is set to less than 0.2 mm through the filtering effect of the filter layer, thereby avoiding blockage caused by particles passing through the gravity channel, and screening out particles with large particle sizes in the ink can also improve printing quality.

[0023] Preferably, the end surface of the sealing slider in contact with the nozzle is made of rubber material.

[0024] In the above solution, by setting the surface where the sealing slider contacts the nozzle to be made of rubber material, it is possible to ensure good sealing of the nozzle position and avoid wear on the nozzle end surface.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. Compared with the existing printer ink cartridges, the present invention provides an "L"-shaped sealing slider for automatically opening and closing the nozzle, and utilizes the heat generated by the preheating of the heating element when the printer is started, so that the thermal expansion material in the expansion chamber can drive the sealing slider to automatically open. When the printer is not in use, the sealing slider will automatically close the nozzle position to avoid contact between the nozzle and the outside air, thereby preventing the ink at the nozzle position from drying up and causing blockage. When the nozzle is closed, a sealed channel will be formed in the circulation chamber, so that an ink circulation circulation route is formed between the filter chamber, the secondary ink chamber and the circulation chamber, so that the ink remains in a slow flow state, and ink deposition is avoided to cause blockage at the nozzle position, thereby improving the printing quality.

[0027] 2. The present invention sets a filter chamber, and when the ink passes through the filter layer of the filter chamber, the solid particles with a particle size greater than a specified value in the ink can be filtered out, thereby ensuring that the ink reaching the nozzle will not block the nozzle, and the fewer solid particles in the ink, the better the printing quality. In the non-printing state, the ink will be pumped to the upper part of the filter chamber for many times under the action of the pumping pump and pass through the filter layer to enter the secondary ink chamber and the nozzle assembly again, forming a circulating flow. On the one hand, it can maintain the fluidity of the ink and avoid deposition that causes nozzle blockage. On the other hand, since the ink passes through the filter layer in the filter chamber for many times, the quality of the ink can be further improved, thereby improving the printing quality.

[0028] 3. The present invention sets a floating switch. When the liquid level in the secondary ink chamber rises to a specified height, the floating switch slides upward due to the buoyancy of the liquid surface to connect the circuit, so that the pumping pump rotates at high speed, and quickly pumps the ink in the nozzle assembly and the secondary ink chamber to the upper part of the filter chamber for the next circulation. The pumping pump is started only when the liquid level reaches the specified height. On the one hand, it can save the power used by the pumping pump, and can be used for a long period of time through the battery when the printer is not connected to the power. On the other hand, when the liquid level is not higher than the specified height, the pumping pump is not started to ensure that the ink circulation speed is slow, and the evaporation will not be accelerated due to the fast flow rate. In addition, the rapid pumping action of the pumping pump can make the ink experience a stirring effect at regular intervals, thereby avoiding ink deposition and improving the printing quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0030] Figure 1 It is the overall structure diagram of the present invention;

[0031] Figure 2 It is a three-dimensional cross-sectional view of the internal structure of the present invention;

[0032] Figure 3 is a side sectional view of the present invention;

[0033] Figure 4 for Figure 2 A magnified view of the structure at center;

[0034] Figure 5 for Figure 3 A magnified view of the structure at B in the middle;

[0035] Figure 6 It is a front cross-sectional view of the present invention;

[0036] Figure 7 for Figure 6 A magnified view of the structure at C in the middle;

[0037] Figure 8 This is a schematic diagram of the ink flow when the printer is turned off;

[0038] In the figure: 1. ink cartridge chip; 2. cartridge body; 3. cartridge cover; 4. ink storage assembly; 41. ink storage chamber; 42. filter chamber; 421. filter layer; 43. secondary ink chamber; 431. floating switch; 44. connecting air pipe; 5. ink guide assembly; 51. ink guide channel; 511. gravity channel; 512. connecting channel; 513. pumping pump; 514. motor; 52. reflux channel; 6. nozzle assembly; 61. inkjet part; 611. circulation chamber; 612. nozzle; 613. heating element; 614. heat conduction plate; 615. expansion chamber; 62. sealing member; 621. sealing slider; 622. top pressure spring. DETAILED DESCRIPTION

[0039] In order to better understand the above technical solution, the above technical solution will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0040] See also Figures 1 to 8 The present invention provides an inkjet printer cartridge, and the technical solution is as follows:

[0041] As a specific embodiment of the present invention, refer to Figure 1 , Figure 2 and Figure 4 , an inkjet printer ink cartridge, comprising an ink cartridge chip 1, a cartridge body 2 and a cartridge cover 3, and also comprising an ink storage assembly 4, an ink guide assembly 5 and a nozzle assembly 6; the ink storage assembly 4 is arranged in the cartridge body 2; the ink guide assembly 5 comprises an ink guide channel 51 and a reflux channel 52; the ink guide channel 51 is connected to the lower end of the ink storage assembly 4; the reflux channel 52 is connected to the upper end of the ink storage assembly 4; the nozzle assembly 6 comprises an inkjet component 61 and a sealing component 62; one end of the inkjet component 61 is connected to the ink guide channel 51, and the other end The ink in the ink storage assembly 4 flows from the lower part of the ink storage assembly 4 through the ink guide channel 51 into the inkjet component 61 under the action of gravity. When the ink exceeds the set height (i.e., when it reaches the height of the floating switch 431), the ink flows back to the upper part of the ink storage assembly 4 through the reflux channel 52. The sealing member 62 is connected to the inkjet component 61. When the printer is not started, the sealing member 62 slides to the position of closing the inkjet component 61, so that the ink in the ink cartridge is isolated from the outside air, thereby ensuring that the ink will not dry up and become clogged.

[0042] As a specific embodiment of the present invention, refer to Figure 2 , Figure 3 and Figure 8The ink storage assembly 4 includes an ink storage chamber 41, a filter chamber 42, a secondary ink chamber 43 and a connecting air pipe 44; the ink storage chamber 41 is opened at the upper part of the box body 2, and a sponge full of ink is stored in the ink storage chamber 41. During the printing process, the ink in the nozzle assembly 6 is discharged, and the negative pressure generated will cause the ink to be sucked out of the sponge and enter the filter chamber 42; the filter chamber 42 is arranged at the lower part of the ink storage chamber 41; the secondary ink chamber 43 is arranged below the filter chamber 42; the connecting air pipe 44 is connected between the filter chamber 42 and the secondary ink chamber 43. During the printing process, the ink reaching the nozzle assembly 6 will be sprayed out under the action of thermal foaming. At this time, negative pressure will be generated on the ink storage assembly 4, so that the ink in the ink storage chamber 41 will flow into the ink guide assembly 5 through the filter chamber 42. The ink passing through the filter chamber 42 will be filtered out of the particles therein to prevent the particles in the ink from clogging the nozzle 612. The ink filtered in the filter chamber 42 will enter the secondary ink chamber 43 under the action of gravity. The ink in the secondary ink chamber 43 will flow into the nozzle assembly 6. Since the connecting air pipe 44 can balance the air pressure in the two chambers, the ink will flow slowly at this time to prevent the ink at the nozzle 612 from being in a static state for a long time and being deposited and blocked. At the same time, the gas in the nozzle assembly 6 can be discharged into the filter chamber 42 and the secondary ink chamber 43, thereby avoiding the reduction in printing quality due to the failure to empty the gas at the nozzle 612 during printing.

[0043] As a specific embodiment of the present invention, refer to Figure 3 and Figure 4 The ink guide channel 51 includes a gravity channel 511, a connecting channel 512, a pumping pump 513 and a motor 514; the gravity channel 511 is connected between the bottom of the filter chamber 42 and the secondary ink chamber 43; the connecting channel 512 is connected between the secondary ink chamber 43 and the nozzle assembly 6; the pumping pump 513 is connected to the nozzle assembly 6; and the motor 514 is connected to the pumping pump 513. When the ink rises to a certain height, the pumping pump 513 can be used to pump the ink from the secondary ink chamber 43 back to the filter chamber 42, so that the ink undergoes multiple filtering cycles, thereby increasing the filtering effect, and the ink can flow quickly during the pumping process to prevent the deposition of solid particles in the ink.

[0044] As a specific embodiment of the present invention, refer to Figure 4 and Figure 8, a floating switch 431 is provided in the secondary ink chamber 43; the floating switch 431 is electrically connected to the motor 514. The floating switch 431 will rise and fall with the height of the ink liquid level in the secondary ink chamber 43. When the liquid level in the secondary ink chamber 43 is higher than the specified height, the motor 514 will be started. At this time, the pumping pump 513 will pump most of the ink in the secondary ink chamber 43 and the nozzle assembly 6 back to the filter chamber 42. In order to enable the pumping pump 513 to return more ink to the filter chamber 42 each time it pumps, the height of the pumping pump 513 can be lowered so that the height of the pumping pump 513 is lower than the height of the secondary ink chamber 43. Under the balanced air pressure of the connecting air pipe 44, the liquid level in the secondary ink chamber 43 will be the same as the liquid level in the reflux channel 52. When the liquid level in the secondary ink chamber 43 can make the liquid level of the ink at the position of the pumping pump 513 completely submerge the pumping pump 513, the pumping The pump 513 can pump more ink into the filter chamber 42, further delaying the time for the next start-up of the pump 513 and saving battery power; since the refluxed ink enters the filter chamber 42 from the upper part of the filter chamber 42, it will be filtered again at this time. Before printing, the ink will be filtered multiple times in the filter chamber 42 to ensure that the ink will not clog the nozzle 612, and when the ink is pumped away, the motor 514 will be turned off, thereby saving power and ensuring that the motor 514 can enable the pump 513 to work multiple times when not printing for a long time. The use of button batteries can ensure that the pump 513 works multiple times to save costs. In addition, rechargeable batteries can also be used to charge the batteries synchronously each time the printer is used to ensure that the pump 513 can continue to work, further improving the service life of the ink cartridge.

[0045] As a specific embodiment of the present invention, refer to Figure 5 , Figure 6 and Figure 7The inkjet element 61 includes a circulation chamber 611, a nozzle 612, a heating element 613, a heat conducting plate 614 and an expansion chamber 615; the circulation chamber 611 is opened on the bottom wall of the box body 2; the nozzle 612 linear array is opened through the bottom of the circulation chamber 611, and since the nozzle 612 is designed as an inverted cone structure, the surface tension of the ink itself can overcome the gravity, so that the ink will not leak out from the nozzle 612, and will only be discharged when affected by external force; the heating element 613 linear array is arranged on the upper part of the circulation chamber 611, and each heating element 613 corresponds to a nozzle 612; the heat conducting plate 614 is arranged above the heating element 613; the expansion chamber 615 is opened above the circulation chamber 611, and the expansion chamber 615 stores thermal expansion objects. By setting the heat conduction plate 614, the heating element 613 of the printer will be preheated before printing. During the preheating process, the heat conduction plate 614 will absorb heat from the heating element 613. At this time, the heat expansion material in the expansion cavity 615 will expand due to the heat, thereby pushing the seal 62 from the sealed nozzle 612 state to the open nozzle 612 state. During the printing process, the temperature of the heating element 613 will rise rapidly to print. At this time, the heat expansion material will keep the seal 62 in the open state under the action of thermal expansion, and normal printing will be performed. When the printing is completed, the heating element 613 stops absorbing heat. At this time, the expansion material in the expansion cavity 615 returns to its original state, and the seal 62 closes the nozzle 612 to ensure that the ink at the nozzle 612 position will not contact the outside air.

[0046] As a specific embodiment of the present invention, refer to Figure 5 and Figure 7 The sealing member 62 includes a sealing slider 621 and a pressure spring 622 ; the sealing slider 621 is slidably installed in the expansion chamber 615 , and the sealing slider 621 is an “L”-shaped structure; the pressure spring 622 is connected between the sealing slider 621 and the expansion chamber 615 . The "L"-shaped sealing slider 621 can slide freely and switch the position of the nozzle 612 under the expansion action of the expansion chamber 615. The nozzle 612 is arranged in a linear array so that the sealing slider 621 can better seal all the nozzles 612, avoiding the contact of the nozzle 612 with the outside air, thereby prolonging the time for the ink to dry up; and by sealing the nozzle 612, the circulation chamber 611 can form a closed space, so that the ink will not leak when circulating in the filter chamber 42 and the secondary ink chamber 43, thereby realizing a sealed circulation; the end face of the sealing slider 621 in contact with the nozzle 612 is set to rubber material; by setting the surface of the sealing slider 621 in contact with the nozzle 612 to rubber material, it can ensure that the nozzle 612 position is well sealed and avoid wear on the end face of the nozzle 612.

[0047] As a specific embodiment of the present invention, refer to Figure 3 and Figure 8 , the diameter of the gravity channel 511 is greater than 0.2mm and less than 0.5mm; the diameters of the reflux channel 52 and the connecting channel 512 are both greater than 1mm; in order to allow the ink to fall under the action of gravity, it is necessary to ensure that the ink can overcome the surface tension. Setting the diameter of the gravity channel 511 to be greater than 0.2mm and less than 0.5mm can ensure that the ink can smoothly enter the secondary ink chamber 43 under the action of gravity while slowing down its flow speed as much as possible, and the diameters of the reflux channel 52 and the connecting channel 512 are both greater than 1mm, which can help to quickly return to the filter chamber 42 during the pumping process. A filter layer 421 is provided in the middle of the filter chamber 42; the diameter of the particles in the ink that the filter layer 421 allows to pass is less than 0.1mm. Through the filtering effect of the filter layer 421, the diameter of the particles allowed to pass through the ink is set to less than 0.2mm, thereby avoiding blockage when the particles pass through the gravity channel 511, and screening out the particles with large particle sizes in the ink can also improve the printing quality.

[0048] Working process: When not printing, the sealing slider 621 closes the nozzle 612 to prevent the outside air from contacting the ink at the nozzle 612 and prevent the ink from drying up and clogging the nozzle 612; at the same time, the sealing slider 621 closes the nozzle 612 to form a closed channel in the flow cavity 611. Under the action of gravity, the ink in the filter cavity 42 flows through the secondary ink cavity 43 and drives the ink in the nozzle assembly 6 to flow into the reflux channel 52. When the liquid level is higher than the specified height, the pumping pump 513 starts to pump the ink in the nozzle assembly 6 back to the filter cavity 42 to form a circulation.

[0049] Specifically, in order to ensure that the ink at the nozzle 612 does not come into contact with the outside air and thus dry up and clog, the pressure spring 622 pushes the sealing slider 621 to the position blocking the nozzle 612 when printing is not in progress. At this time, the ink in the nozzle 612 will not come into contact with the outside air, thereby preventing the ink from drying up and clogging the nozzle 612. When the printer is started, the heating element 613 will be preheated first. At this time, the heat is transferred to the heat expansion material in the expansion chamber 615 through the heat conduction plate 614. The heat expansion material expands under the heat and pushes the sealing slider 621, so that it releases the sealing effect on the nozzle 612.

[0050] When not printing, after the sealing slider 621 closes the nozzle 612, the circulation chamber 611 will form a closed channel; in order to prevent the ink from being deposited due to being stationary for a long time, the ink in the filter chamber 42 enters the secondary ink chamber 43 under the action of gravity. At this time, the ink in the secondary ink chamber 43 will enter the nozzle assembly 6 through the connecting channel 512. Since the ink is in a slow flow state, the solid matter in the ink can be prevented from being deposited, and the nozzle 612 is further prevented from being blocked. Since the gas between the filter chamber 42 and the secondary ink chamber 43 is connected, when the ink in the secondary ink chamber 43 rises to the position of the float switch 431, the float switch 431 will be pushed upward under the buoyancy, thereby connecting the circuit of the motor 514 to start the pumping pump 513. The pumping pump 513 pumps the ink entering the reflux channel 52 and the nozzle assembly 6 to the upper part of the filter chamber 42, so that the ink can pass through the filter layer 421 again. After multiple cycles, the ink quality will be significantly improved, thereby improving the printing quality.

[0051] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected, and the scope of the present invention to be protected is defined by the attached claims and their equivalents.

Claims

1. An inkjet printer ink cartridge, comprising an ink cartridge chip (1), a cartridge body (2) and a cartridge cover (3), characterized in that: The invention also comprises an ink storage component (4), an ink guide component (5) and a nozzle component (6); the ink storage component (4) is arranged in the box body (2); the ink guide component (5) comprises an ink guide channel (51) and a return channel (52); the ink guide channel (51) is connected to the lower end of the ink storage component (4); the return channel (52) is connected to the upper end of the ink storage component (4); the nozzle component (6) comprises an inkjet component (61) and a sealing component (62); one end of the inkjet component (61) is connected to the inkjet component (61) and the sealing component (62); The ink storage component (4) is connected to an ink guide channel (51) at one end and connected to a return channel (52) at the other end. The ink in the ink storage component (4) flows from the lower part of the ink storage component (4) through the ink guide channel (51) and enters the inkjet component (61) under the action of gravity. The ink entering the return channel (52) flows back to the upper part of the ink storage component (4) after exceeding a set height. The sealing component (62) is connected to the inkjet component (61). When the printer is not started, the sealing component (62) slides to a position to close the inkjet component (61).

2. An inkjet printer cartridge according to claim 1, characterized in that: The ink storage assembly (4) comprises an ink storage chamber (41), a filter chamber (42), a secondary ink chamber (43) and a connecting air pipe (44); the ink storage chamber (41) is opened at the upper part of the box body (2); the filter chamber (42) is arranged at the lower part of the ink storage chamber (41); the secondary ink chamber (43) is arranged below the filter chamber (42); and the connecting air pipe (44) is connected between the filter chamber (42) and the secondary ink chamber (43).

3. An inkjet printer cartridge according to claim 2, characterized in that: The ink guide channel (51) comprises a gravity channel (511), a connecting channel (512), a pumping pump (513) and a motor (514); the gravity channel (511) is connected between the bottom of the filter chamber (42) and the secondary ink chamber (43); the connecting channel (512) is connected between the secondary ink chamber (43) and the nozzle assembly (6); the pumping pump (513) is connected to the nozzle assembly (6); and the motor (514) is connected to the pumping pump (513).

4. An inkjet printer cartridge according to claim 3, characterized in that: A floating switch (431) is provided in the secondary ink chamber (43); the floating switch (431) is electrically connected to the motor (514).

5. An inkjet printer cartridge according to claim 1, characterized in that: The inkjet element (61) comprises a circulation chamber (611), a nozzle (612), a heating element (613), a heat conduction plate (614) and an expansion chamber (615); the circulation chamber (611) is opened on the bottom wall of the box body (2); the nozzle (612) is linearly arrayed and penetrates the bottom of the circulation chamber (611); the heating element (613) is linearly arrayed and arranged on the upper part of the circulation chamber (611), and each heating element (613) corresponds to a nozzle (612); the heat conduction plate (614) is arranged above the heating element (613); the expansion chamber (615) is opened above the circulation chamber (611), and a thermal expansion material is stored in the expansion chamber (615).

6. An inkjet printer cartridge according to claim 5, characterized in that: The sealing member (62) comprises a sealing slider (621) and a pressure spring (622); the sealing slider (621) is slidably installed in the expansion chamber (615), and the sealing slider (621) is an "L"-shaped structure; the pressure spring (622) is connected between the sealing slider (621) and the expansion chamber (615).

7. An inkjet printer cartridge according to claim 3, characterized in that: The diameter of the gravity channel (511) is greater than 0.2 mm and less than 0.5 mm; the diameters of the reflux channel (52) and the connecting channel (512) are both greater than 1 mm.

8. An inkjet printer cartridge according to claim 7, characterized in that: A filter layer (421) is arranged in the middle of the filter cavity (42); the filter layer (421) allows particles in the ink with a diameter less than 0.1 mm to pass through.

9. An inkjet printer cartridge according to claim 6, characterized in that: The end surface of the sealing slider (621) in contact with the nozzle (612) is made of rubber material.

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