WO2021139072A1

WO2021139072A1 - Pressure adjustment unit and ink cartridge having same

Info

Publication number: WO2021139072A1
Application number: PCT/CN2020/092813
Authority: WO
Inventors: 余青松; 王海权
Original assignee: 珠海鼎龙汇杰科技有限公司
Priority date: 2020-01-08
Filing date: 2020-05-28
Publication date: 2021-07-15
Also published as: CN212332167U

Abstract

A pressure adjustment unit and an ink cartridge having same. The pressure adjustment unit comprises a surface cover (20), a base (10) and a diaphragm (30); the surface cover (20) fits with the base (10) to form a deformable cavity (102) and an ink cavity, the diaphragm (30) is assembled at the position of the deformable cavity (102), and the deformation of the diaphragm (30) is constrained in the deformable cavity (102); a communication portion (40) is provided in the deformable cavity (102), and the deformable cavity (102) is in communication with the ink cavity or the external atmosphere by means of the communication portion (40); a one-way valve (60) is provided on a passage connecting the deformable cavity (102) with the ink cavity, and the deformation of the diaphragm (30) can close the communication portion (40), and the one-way valve (60) can be opened by changing the pressure in the deformable cavity (102).

Description

Pressure regulating unit and ink cartridge with same

Related application

This application claims the priority of the Chinese patent application filed on January 8, 2020, the application number is 202020038102.3, and the invention title is "pressure regulating unit and ink cartridge with the same", the entire content of which is incorporated into this application by reference.

Technical field

This application belongs to the technical field related to inkjet printing, and particularly relates to a pressure regulating unit and an ink cartridge having the same.

Background technique

An inkjet printer is a device that uses rapid prototyping technology. The color liquid ink is sprayed onto the printing paper through nozzles through the print head. Among them, the ink cartridge is an important part of the inkjet printer, which is used to store ink to provide the printer head with the ink needed for printing.

After the ink cartridge is installed in the printer and enters the printing state, a negative pressure will be formed in the ink storage cavity as the ink is consumed. The pressure inside and outside the ink cartridge needs to be balanced to ensure that printing will not be interrupted. Unbalanced pressure inside and outside the ink cartridge will cause an abnormality in the ink supply system. Excessive pressure during the printing process will cause color loss. Pressure leakage during printing will cause color mixing, which will make the printing performance unstable, unreliable, and poor print quality.

In order to eliminate the problem of ink overflow and printing interruption when the ink is not exhausted, it is necessary to improve the air pressure balance performance and sealing performance of the ink cartridge. At present, the existing ink cartridges are disclosed in the Chinese mainland patent (publication number: CN203157372U). The ink cartridge is provided with a deformable cavity connected to the air filling port and a one-way valve that closes or opens with the expansion or contraction of the deformable cavity. . This structure can effectively remove air bubbles in the print nozzle and meet the needs of the printer. The variable cavity is composed of an inner wall formed on the upper shell of the first ink storage chamber and a variable film covering the inner wall. However, since the variable film of the deformable cavity expands and is easily broken during operation, it is not conducive to high-intensity printing, and the service life of the ink cartridge is short.

Summary of the invention

According to various embodiments of the present application, there is provided a pressure regulating unit, including a face cover, a base, and a diaphragm. The face cover cooperates with the base and forms a deformable cavity and an ink cavity, and the diaphragm is mounted on The position of the deformable cavity and the deformation of the diaphragm is constrained in the deformable cavity; a communicating portion is provided in the deformable cavity, and the deformable cavity communicates with the ink through the communicating portion Cavity or external atmosphere; the fluid path connecting the deformable cavity and the ink cavity is provided with a one-way valve, and the diaphragm is deformed to close the communicating portion, and by changing the deformable cavity The pressure inside can open the one-way valve.

In one of the embodiments, the communicating portion is provided with a first flow channel hole, and the diaphragm can abut against the first flow channel hole after being deformed, and block the first flow channel hole.

In one of the embodiments, the communicating portion is set as a connecting convex post fixed to the base, the diaphragm is provided with a sealing guide post on the end face facing the connecting convex post, and the sealing guide post The outer diameter gradually decreases from the direction away from the diaphragm, the sealing guide post is partially inserted into the first flow channel hole of the connecting convex post, and the diaphragm can drive the sealing guide post to block the first flow passage hole. First-rate pass hole.

In one of the embodiments, the pressure adjusting unit includes an elastic element, the elastic element is located in the deformable cavity, one end of the elastic element abuts against the bottom of the base, and the other end of the elastic element abuts against On one end surface of the diaphragm close to the connecting protrusion.

In one of the embodiments, the number of the ink chambers is two, which are respectively defined as a first ink chamber and a second ink chamber, the first ink chamber and the second ink chamber are spaced apart; the first ink chamber An ink cavity communicates with the deformable cavity through the communicating portion, the deformable cavity is in communication with the second ink cavity, and the one-way valve is disposed in the deformable cavity and the second ink cavity On the connected pathway.

In one of the embodiments, the bottom of the base is provided with a second flow passage hole and a connecting hole, the second flow passage hole is provided at a position where the deformable cavity is located, and the connecting hole is provided at the first The position where the two ink chambers are located; the base further includes an outer portion, the outer portion is provided with a first groove, and the first groove is respectively communicated with the second flow channel hole and the connecting hole; wherein, The one-way valve is arranged at the position of the connecting hole.

In one of the embodiments, the pressure regulating unit further includes a first sealing membrane, and the first sealing membrane is attached to the surface of the outer part to connect the first groove and the second The channel formed by the flow channel hole and the connecting hole is sealed.

In one of the embodiments, the bottom of the base is provided with a third flow channel hole, and the third flow channel hole is provided at a position where the first ink chamber is located, and the base further includes an outer portion. The portion is provided with a second groove, and the second groove is respectively communicated with the third flow channel hole and the communicating portion.

In one of the embodiments, the pressure regulating unit further includes a second sealing diaphragm, and the second sealing diaphragm is attached to the surface of the outer portion to connect the second groove and the first The channel formed by the first flow passage hole and the third flow passage hole is sealed.

In one of the embodiments, the pressure regulating unit further includes an air inlet, and the air inlet is respectively communicated with the first ink chamber and the external atmosphere.

In one of the embodiments, the one-way valve is configured as a flexible sealing element, and the flexible sealing element includes a connecting rod portion fixedly connected to the connecting hole, and a sealing portion provided at one end of the connecting rod portion; The sealing part is covered on one side of the connecting hole.

In one of the embodiments, the base is provided with a connecting boss at the position where the second ink chamber is located, the connecting boss has an inner concave surface, and the connecting hole is provided in the inner side of the connecting boss. On the concave surface, and the sealing portion abuts on the inner concave surface of the connecting boss for blocking the connecting hole.

The present application also provides an ink cartridge, comprising the pressure adjusting unit as described in any one of the above embodiments, the base is provided with an inflation port, the deformable cavity is inflated through the inflation port, and the filled gas can be The diaphragm is deformed when pushed against it.

As a preferred solution of the present application, a limit stop is provided on the face cover, the diaphragm has a stop matching portion that cooperates with the limit stop, and the diaphragm can pass through the limit stop and The matching limit between the matching parts of the stopper is at the position of the deformable cavity.

Due to the application of the above technical solutions, this application has the following advantages compared with the prior art:

The pressure regulating unit provided by the present application and the ink cartridge provided with the pressure regulating unit utilizes the deformable diaphragm in the deformable cavity to close the communicating portion in the deformable cavity, and opens the one-way valve by changing the pressure in the deformable cavity to realize the setting The ink ejection function of the ink cartridge of the pressure regulating unit, and the deformation of the diaphragm is constrained in the deformable cavity, so as to protect the diaphragm. The deformable cavity has the function of preventing the diaphragm from being damaged due to excessive expansion, thereby increasing the service life of the ink cartridge.

Description of the drawings

In order to better describe and illustrate the embodiments and/or examples of the inventions disclosed herein, one or more drawings may be referred to. The additional details or examples used to describe the drawings should not be considered as limiting the scope of the disclosed invention, the currently described embodiments and/or examples, and the best mode of these inventions currently understood. .

FIG. 1 is a schematic diagram of an exploded structure of an ink cartridge provided by an embodiment of the application.

FIG. 2 is a schematic diagram of the three-dimensional structure of the base in the ink cartridge of FIG.

FIG. 3 is a schematic diagram of the three-dimensional structure of the base of the ink cartridge of FIG. 1 from another perspective.

FIG. 4 is a schematic view of the three-dimensional structure of the diaphragm in the ink cartridge of FIG. 1 from another perspective.

FIG. 5 is a schematic diagram of the three-dimensional structure of the middle cover of the ink cartridge in FIG. 1 from another perspective.

Fig. 6 is a schematic view of the three-dimensional structure of the one-way valve in the ink cartridge of Fig. 1 from another perspective.

Among them, 10 represents the base; 11 represents the air inlet; 12 represents the ink outlet; 13 represents the air inlet; 20 represents the face cover; 21 represents the limit stop; 211 represents the vent; 30 represents the diaphragm; 31 represents the sealing guide post 32 represents the mating part of the stop; 40 represents the connecting portion; 41 represents the first flow channel hole; 42 represents the third flow channel hole; 43 represents the second flow channel hole; 44 represents the connecting hole; 50 represents the elastic element; 60 represents the one-way Valve; 61 means the connecting rod part; 62 means the sealing part; 63 means the limit protrusion; 70 means the connecting boss; 71 means the inner concave surface; 72 means the retaining ring; 100 means the outer part; 110 means the first groove; 120 means The second groove; 101 represents the first ink cavity; 102 represents the deformable cavity; 103 represents the second ink cavity.

Detailed ways

The technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by those of ordinary skill in the art without creative work shall fall within the protection scope of this application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of this application. The terms used in the specification of the application herein are only for the purpose of describing specific embodiments, and are not intended to limit the application.

Please refer to Figures 1 to 6, the ink cartridge provided in this embodiment is detachably installed in an inkjet printer (not shown). The inkjet printer includes an air pump (not shown) to supply ink to the print head of the inkjet printer. Among them, the ink cartridge includes a pressure regulating unit.

The pressure regulating unit of this embodiment includes a base 10, a face cover 20 and a diaphragm 30. The face cover 20 cooperates with the base 10 and forms a deformable cavity 102 and an ink cavity. The diaphragm 30 is assembled at the position of the deformable cavity 102, and the deformation of the diaphragm 30 is constrained in the deformable cavity 102. It is worth mentioning that “the deformation of the diaphragm 30 is constrained in the deformable cavity 102” means that the diaphragm 30 can only be deformed in the deformable cavity 102. In this way, the deformable cavity 102 plays a role of protecting the diaphragm 30, preventing the diaphragm 30 from being damaged due to excessive deformation, thereby increasing the service life of the ink cartridge.

In this embodiment, a communicating portion 40 is provided in the deformable cavity 102, and the deformable cavity 102 is connected to the ink cavity or the external atmosphere through the communicating portion 40. The passage connecting the deformable cavity 102 and the ink cavity is provided with a one-way valve 60, and the diaphragm 30 is deformed to close the communicating portion 40, and the one-way valve 60 can be opened by changing the pressure in the deformable cavity 102. It should be noted that when the diaphragm 30 is deformed, the deformable cavity 102 is in communication with the ink chamber or the external atmosphere, and the one-way valve 60 can be combined with the force applied to the one-way valve 60 according to the negative pressure generated by the consumption of ink. The check valve 60 is closed or opened as a result of the comparison between the pressures required to open it. Specifically, when the negative pressure generated by the consumption of ink is applied to the one-way valve 60 more than the pressure required to open the one-way valve 60, the one-way valve 60 is opened; when the negative pressure generated by the consumption of ink is used for the one-way valve 60 When the force of the check valve 60 is less than or equal to the pressure required to open the check valve 60, the check valve 60 is closed. In other words, the one-way valve 60 needs a certain pressure value to open, so a certain negative pressure is maintained in the ink chamber, so that the bubbles in the print head can be introduced into the ink cartridge to clear the bubbles in the print head.

Specifically, the base 10 is provided with an inflation port 11, and the inflator can inflate the deformable cavity 102 through the inflation port 11, and the filled gas can push the diaphragm 30 to deform the diaphragm 30. It should be noted that the base 10 is provided with an ink outlet 12 communicating with the ink chamber, and the ink in the ink chamber can flow to the print head through the ink outlet 12, so that the ink cartridge provided with the pressure regulating unit can supply ink to the print head. .

Among them, the connecting portion 40 is configured as a connecting boss fixed to the base 10. The communicating portion 40 is provided with a first flow passage hole 41 communicating with the ink chamber or the external atmosphere; when the inflation port 11 is inflated into the deformable cavity 102, the filled gas can push the diaphragm 30 to deform the diaphragm 30. After being deformed, 30 can abut against the first flow passage hole 41 and block the first flow passage hole 41, so as to close the connecting portion 40.

It can be understood that the diaphragm 30 is pushed by the gas filled into the deformable cavity 102 and can cooperate with the communicating portion 40, so that the deformable cavity 102 limits the deformation of the diaphragm 30, so that the diaphragm 30 The deformation of 30 when pushed by the gas is small, which in turn plays the role of protecting the diaphragm 30.

Further, the diaphragm 30 is provided with a sealing guide post 31 on the end surface facing the connecting boss. The outer diameter of the sealing guide post 31 gradually decreases from the direction away from the diaphragm 30. The sealing guide post 31 is partially inserted into the first connecting boss. Inside the flow channel hole 41, and the diaphragm 30 can drive the sealing guide post 31 to block the first flow channel hole 41. That is to say, the ink cartridge of this embodiment uses the sealing guide post 31 on the diaphragm 30 to block the first flow passage hole 41 of the connecting convex post, so as to ensure that when the diaphragm 30 and the connecting convex post are matched, the first flow passage hole 41 is blocked. The sealing effect of plugging; on the other hand, the sealing guide post 31 of this embodiment is partially inserted into the first flow channel hole 41, and a gap is left between the hole wall of the first flow channel hole 41 for the first ink chamber 101 The ink inside is introduced into the deformable cavity 102 through the first flow channel hole 41. In addition, the sealing guide post 31 is partially inserted into the first flow passage hole 41 of the connecting boss, which can guide the movement of the diaphragm 30 driven by the gas, and further ensure the blocking effect of the first flow passage hole 41.

Among them, the pressure regulating unit of this embodiment includes an elastic element 50, which is located in the deformable cavity 102, one end of the elastic element 50 abuts against the bottom of the base 10, and the other end of the elastic element 50 abuts against the diaphragm 30 near the connecting protrusion. The end face of one side of the column. When no gas is introduced into the gas filling port 11, the diaphragm 30 is pushed away from the connecting protrusion under the push of the elastic element 50 and reset. In this embodiment, the elastic element 50 is set as a spring.

In this embodiment, the face cover 20 is provided with a limit stop 21, and the limit stop 21 cooperates with the base 10 to form a deformable cavity 102. The diaphragm 30 has a stopper matching portion 32 that cooperates with the stopper 21, and the diaphragm 30 can be limited to the position of the deformable cavity 102 by the cooperation between the stopper 21 and the stopper 32. In this embodiment, the diaphragm 30 is assembled on the limit stop 21, and then the face cover 20 is assembled on the base 10, so that the diaphragm 30 can be assembled at the position of the deformable cavity 102. It can be seen that this embodiment greatly simplifies the assembly process and makes the assembly very convenient. In this embodiment, the diaphragm 30 divides the deformable cavity 102 into two parts, that is, the deformable cavity 102 includes a first part defined by the face cover 20 and the diaphragm 30 in cooperation, and the diaphragm 30 and the base 10 are in cooperation with each other. Define the second part. The communicating portion 40 is located in the second part of the deformable cavity 102. When gas is introduced into the first part of the deformable cavity 102, the gas can push the diaphragm 30 and deform, so that the diaphragm 30 closes the communication portion 40.

Wherein, the limit stop 21 is provided with a vent hole 211, and the vent hole 211 is connected to the inflation port 11. When the inflation port 11 inflates the deformable cavity 102, the gas introduced from the inflation port 11 can enter the part of the diaphragm 30 located in the limit stop 21, that is, enter the first part of the deformable cavity 102, so as to realize the adjustment of the diaphragm. 30's resistance push.

Among them, in the pressure regulating unit disclosed in the first embodiment of the present application, the number of ink chambers is two, which are defined as the first ink chamber 101 and the second ink chamber 103, and the first ink chamber 101 and the second ink chamber 103 are separated from each other. The first ink chamber 101 communicates with the deformable chamber 102 through the communicating portion 40, the deformable chamber 102 communicates with the second ink chamber 103, and the one-way valve 60 is set in the deformable chamber 102 to communicate with the second ink chamber 103 On the pathway. That is to say, the deformable cavity 102 in the pressure regulating unit of this embodiment communicates with the ink in the first ink chamber 101 through the communicating portion 40, so that the ink in the first ink chamber 101 is first introduced to the deformable through the communicating portion 40. The cavity 102 is then introduced from the deformable cavity 102 to the second ink cavity 103 via the one-way valve 60, and finally the ink in the second ink cavity 103 is used to discharge ink.

Specifically, the bottom of the base 10 is provided with a second flow channel hole 43 and a connection hole 44, the second flow channel hole 43 is provided at the position where the deformable cavity 102 is located, and the connection hole 44 is provided at the position where the second ink chamber 103 is located; The base 10 further includes an outer portion 100. The outer portion 100 is provided with a first groove 110, and the first groove 110 communicates with the second flow channel hole 43 and the connecting hole 44, respectively. Among them, the one-way valve 60 is provided at the position of the connecting hole 44. That is to say, the deformable cavity 102 and the second ink cavity 103 of this embodiment are communicated with each other through a channel formed by the second flow channel hole 43, the first groove 110, and the connecting hole 44 that communicate with each other.

Wherein, the pressure regulating unit of this embodiment further includes a first sealing diaphragm (not shown), and the first sealing diaphragm is attached to the surface of the outer portion 100 to connect the first groove 110 and the second flow passage hole 43 And the channel formed by the connecting hole 44 is sealed, so that the channel for communicating the deformable cavity 102 and the second ink cavity 103 in this embodiment is a relatively sealed channel. It should be noted that the first groove 110 is not limited to being provided on the outer portion 100 of the base 10, and those skilled in the art can arrange the first groove 110 on the opposite surface of the outer portion 100 of the base 10 according to the needs of use.

In the same way, the bottom of the base 10 is provided with a third flow channel hole 42 which is provided at the position where the first ink chamber 101 is located, and the outer portion 100 of the base 10 is provided with a second groove 120, and the second recess The groove 120 communicates with the third flow channel hole 42 and the first flow channel hole 41 of the communicating portion 40 respectively, so as to realize the communication between the deformable cavity 102 and the first ink cavity 101. Correspondingly, the pressure regulating unit of this embodiment further includes a second sealing diaphragm (not shown), and the second sealing diaphragm is attached to the surface of the outer portion 100 to connect the second groove 120 and the first flow passage hole 41 And the channel formed by the third flow channel hole 42 is sealed.

In this embodiment, the one-way valve 60 is set as a flexible seal, and the flexible seal includes a connecting rod portion 61 fixedly connected to the connecting hole 44, and a sealing portion 62 provided at one end of the connecting rod portion 61; the sealing portion 62 covers On the side of the connecting hole 44, the connecting hole 44 is blocked in this way. When the pressure of the ink in the deformable cavity 40 on the sealing portion 62 is greater than the force required when the sealing portion 62 is deformed, the ink can drive the sealing portion 62 to bend and realize the deformable cavity 102 and the second ink cavity 103的连接。 Connectivity.

Wherein, the base 10 is provided with a connecting boss 70 at the position where the second ink chamber 103 is located, the connecting boss 70 has an inner concave surface 71, the connecting hole 44 is provided on the inner concave surface 71 of the connecting boss 70, and the sealing portion 62 abuts The inner concave surface 71 of the connecting boss 70 is used to block the connecting hole 44. In this way, it is convenient for the one-way valve 60 to be assembled at the position of the connecting hole 44 of the second ink chamber 103. It should be noted that the sealing portion 62 of the flexible sealing element of this embodiment can be configured as a circular flat plate structure according to the requirements of use.

Further, the inner concave surface 71 of the connecting boss 70 is provided with a retaining ring 72 on the periphery of the connecting hole 44, and the sealing portion 62 abuts against the retaining ring 72 to ensure that the sealing portion 62 of the one-way valve 60 is assembled on the connecting boss At 70 o'clock, the connecting hole 44 has a good sealing effect.

Wherein, the connecting rod portion 61 penetrates the inner concave surface 71 of the connecting boss 70, and the part of the connecting rod 61 passing through the inner concave surface 71 is connected to the limiting protrusion 63 to limit the flexible seal in the connecting boss 70 On the concave surface 71.

In addition, it should be noted that the pressure regulating unit of this embodiment further includes an air inlet 13 which is respectively communicated with the first ink chamber 101 and the external atmosphere. When the ink in the base 10 is consumed, a negative pressure is formed in the base 10, and the outside air is drawn into the base 10 through the air inlet 13 to balance the air pressure in the base 10. Wherein, the air intake portion 13 includes an air inlet, and the outside air enters the base 10 through the air inlet. The pressure regulating unit of this embodiment can set the air inlet of the air inlet 13 at a position adjacent to the face cover 20, and can block the ink in the base 10 from passing through by arranging a sponge (not shown) in the air inlet The air intake leaks outward.

In the pressure adjusting unit disclosed in the second embodiment of the present application, the number of ink chambers is one, and the deformable chamber 102 communicates with the outside atmosphere through the communicating portion 40, so that the negative pressure generated by the ink chamber as the ink is consumed can be used The communicating portion 40 takes in air to balance the air pressure in the base 10; the structure and working principle of the one-way valve 60 can be the same as those of the first embodiment, and will not be elaborated here.

In summary, the pressure regulating unit and the ink cartridge provided in the present application utilize the deformable diaphragm in the deformable cavity to close the communicating portion in the deformable cavity, and open the one-way valve by changing the pressure in the deformable cavity, thereby The ink ejection function of the ink cartridge provided with the pressure regulating unit is realized, and the deformation of the diaphragm is constrained in the deformable cavity, so as to protect the diaphragm. The deformable cavity has the function of preventing the diaphragm from being damaged due to excessive expansion, thereby improving the service life of the ink cartridge. At the same time, the diaphragm can be assembled at the position of the deformable cavity corresponding to the communicating part, which facilitates the assembly of the diaphragm.

The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, all possible combinations of the various technical features in the above-mentioned embodiments are not described. However, as long as there is no contradiction in the combination of these technical features, All should be considered as the scope of this specification.

The above-mentioned embodiments only express several implementation manners of the present application, and their description is relatively specific and detailed, but they should not be interpreted as a limitation on the scope of the patent application. It should be pointed out that for those of ordinary skill in the art, without departing from the concept of this application, several modifications and improvements can be made, and these all fall within the protection scope of this application. Therefore, the scope of protection of the patent of this application shall be subject to the appended claims.

Claims

A pressure regulating unit includes a face cover, a base, and a diaphragm. The face cover cooperates with the base and forms a deformable cavity and an ink cavity. The diaphragm is assembled at a position of the deformable cavity, and The deformation of the diaphragm is constrained in the deformable cavity; a communicating portion is provided in the deformable cavity, and the deformable cavity communicates with the ink cavity or the external atmosphere through the communicating portion; the deformable cavity The fluid path connected to the ink chamber is provided with a one-way valve, and the diaphragm can be deformed to close the communicating portion, and the one-way valve can be opened by changing the pressure in the deformable cavity .
The pressure regulating unit according to claim 1, wherein the communicating portion is provided with a first flow passage hole, and the diaphragm can abut against the first flow passage hole after being deformed, and block the first flow Dow hole.
The pressure regulating unit according to claim 2, wherein the connecting portion is configured as a connecting protrusion fixed to the base, and the diaphragm is provided with a sealing guide on an end surface facing the connecting protrusion The outer diameter of the sealing guide post gradually decreases from the direction away from the diaphragm, the sealing guide post is partially inserted into the first flow channel hole of the connecting convex post, and the diaphragm can drive the The sealing guide pin blocks the first flow channel hole.
The pressure adjusting unit according to claim 3, wherein the pressure adjusting unit comprises an elastic element, the elastic element is located in the deformable cavity, and one end of the elastic element abuts against the bottom of the base, The other end of the elastic element abuts against an end surface of the diaphragm close to the connecting protrusion.
The pressure adjusting unit according to claim 1, wherein the number of the ink chambers is two, which are defined as a first ink chamber and a second ink chamber, respectively, the first ink chamber and the second ink chamber The cavities are arranged separately; the first ink cavity communicates with the deformable cavity through the communicating portion, the deformable cavity communicates with the second ink cavity, and the one-way valve is arranged on the deformable The cavity is in a passage communicating with the second ink cavity.
The pressure regulating unit according to claim 5, wherein a second flow channel hole and a connecting hole are opened at the bottom of the base, and the second flow channel hole is provided at a position where the deformable cavity is located. The connecting hole is provided at the position where the second ink chamber is located; the base further includes an outer portion, the outer portion is provided with a first groove, and the first groove is respectively connected to the second flow channel hole and The connecting hole communicates; wherein the one-way valve is arranged at the position of the connecting hole.
The pressure regulating unit according to claim 6, characterized in that the pressure regulating unit further comprises a first sealing membrane, and the first sealing membrane is attached to the surface of the outer part to attach the first sealing membrane to the surface of the outer part. The channel formed by a groove, the second flow channel hole and the connecting hole is sealed.
The pressure regulating unit according to claim 5, wherein a third flow channel hole is opened at the bottom of the base, and the third flow channel hole is provided at a position where the first ink chamber is located, and the base It also includes an outer portion, the outer portion is provided with a second groove, and the second groove is respectively communicated with the third flow passage hole and the communicating portion.
8. The pressure regulating unit according to claim 8, wherein the pressure regulating unit further comprises a second sealing membrane, and the second sealing membrane is attached to the surface of the outer part, so that the The passage formed by the second groove, the first flow passage hole and the third flow passage hole is sealed.
9. The pressure adjustment unit according to any one of claims 5-9, wherein the pressure adjustment unit further comprises an air inlet, and the air inlet is respectively communicated with the first ink chamber and the external atmosphere.
The pressure regulating unit according to any one of claims 6-9, wherein the one-way valve is configured as a flexible seal, and the flexible seal includes a connecting rod fixed to the connecting hole, And a sealing part arranged at one end of the connecting rod part; the sealing part is covered at one side of the connecting hole.
The pressure regulating unit according to claim 11, wherein the base is provided with a connecting boss at a position where the second ink chamber is located, the connecting boss has an inner concave surface, and the connecting hole is arranged at the position where the second ink chamber is located. The inner concave surface of the connecting boss, and the sealing portion abuts on the inner concave surface of the connecting boss to block the connecting hole.
An ink cartridge, comprising the pressure regulating unit according to any one of claims 1-12, the base is provided with an inflation port, the deformable cavity is inflated through the inflation port, and the filled gas can resist The diaphragm is deformed when pushed.
The ink cartridge according to claim 13, wherein the face cover is provided with a limit stop, the diaphragm has a stop matching portion that cooperates with the limit stop, and the diaphragm can pass through the The coordination between the limit stop and the matching part of the stop is limited at the position of the deformable cavity.