Piezoelectric nozzle and ink-jet printing system

Abstract

The invention relates to a piezoelectric nozzle and an ink-jet printing system, and the piezoelectric nozzle comprises an ink box which comprises a housing, an ink bag and a ventilation structure, the ink bag is located in a sealing cavity in the housing, the bottom of the housing is provided with a first communication hole, and the ink bag communicates with the first communication hole; the chip is mounted on the bottom surface of the shell, and the chip comprises a main body part and a piezoelectric structure; the liquid supply flow channel, the storage flow channel and the direct supply flow channel in the main body part are communicated in sequence; the functional liquid in the storage flow channel overflows and flows into the direct supply flow channel; a liquid inlet hole communicated with the liquid supply flow channel is formed in the top surface of the chip, and the liquid inlet hole is communicated with the first communication hole; and an injection hole is formed in the inner bottom surface of the direct supply flow channel. The ink box is used for directly supplying the functional liquid to the chip, an ink supply system is not needed, miniaturization of jet printing equipment is facilitated, the ink-jet printing technology is easy to popularize and apply, bubbles are prevented from being generated in the functional liquid due to the design of the flow channel in the chip, and the printing quality is guaranteed.

Description

Technical Field

[0001] The present application relates to the field of inkjet printing technology, and in particular to a piezoelectric nozzle and an inkjet printing system. Background Art

[0002] Inkjet printing, a contactless, pressureless, and maskless technology for display device processing, can precisely apply tiny droplets (in the picoliter or femtoliter range) to the desired location. The solvent evaporates, dries, and solidifies to form a thin film. This makes it easy to create extremely high-resolution display devices, especially when processing large-scale panels. Conventionally, piezoelectric printheads are used for printing.

[0003] In related technologies, a piezoelectric printhead consists of an ink cartridge and a chip. The ink cartridge supplies ink to the chip, which then drives the ejection of a functional fluid. Typically, the ink cartridge is connected to an external ink supply system. This system maintains the supply of functional fluid to the chip, which is then controlled by the chip to eject the functional fluid from the chip.

[0004] During the transportation process before the functional liquid is sprayed, the functional liquid first enters the chip from the ink cartridge and falls into the chip's receiving cavity. A plurality of spray holes are opened at the bottom of the receiving cavity. The piezoelectric structure acts on the receiving cavity, thereby spraying the functional liquid out from the spray holes.

[0005] However, on the one hand, the ink cartridge requires an external ink supply system, making the overall structure complex and occupying a large space. This makes it difficult to apply piezoelectric nozzles to small desktop or experimental equipment, and hinders the widespread application of inkjet printing technology. Secondly, after the functional liquid enters the chip, due to the drop in the functional liquid, it is easy to generate bubbles in the chip's holding cavity. Therefore, when the functional liquid is ejected, bubbles are easily ejected at the same time, resulting in poor droplets and affecting print quality. Summary of the Invention

[0006] The embodiments of the present application provide a piezoelectric nozzle and inkjet printing system to solve the technical problems in related technologies, such as the ink cartridge needs to be externally connected to the ink supply system, which makes the piezoelectric nozzle applicable to miniaturized equipment, affecting the promotion and application of inkjet printing technology, and the functional liquid easily generates bubbles in the chip, thereby affecting the printing quality.

[0007] In a first aspect, a piezoelectric nozzle is provided, comprising:

[0008] An ink cartridge comprising a housing, an ink sac, and a vent structure, wherein the ink sac is located in a sealed cavity within the housing, a first communication hole is defined at the bottom of the housing, and the ink sac is in communication with the first communication hole; the vent structure is in communication with the sealed cavity, and the sealed cavity is in communication with an external negative pressure device via the vent structure;

[0009] A chip is mounted on the bottom surface of the shell, and the chip includes a main body and a piezoelectric structure; a liquid supply channel, a storage channel and a direct supply channel are provided in the main body, and the liquid supply channel, the storage channel and the direct supply channel are connected in sequence; the height of the inner bottom surface of the storage channel is lower than the height of the inner bottom surface of the direct supply channel, the storage channel is connected with the bottom of the direct supply channel, and the functional liquid in the storage channel overflows and flows into the direct supply channel; a liquid inlet hole connected with the liquid supply channel is provided on the top surface of the chip, and the liquid inlet hole is connected with the first connecting hole; a spray hole is provided on the inner bottom surface of the direct supply channel; the piezoelectric structure is arranged on the top surface of the main body, and the active end of the piezoelectric structure acts on the direct supply channel to make the functional liquid in the direct supply channel spray out from the spray hole.

[0010] In some embodiments, there are multiple direct supply flow channels, each of which is provided with the injection hole, and the multiple direct supply flow channels are connected to the storage flow channel; the piezoelectric structure includes multiple active ends, and the multiple active ends of the piezoelectric structure act on the multiple direct supply flow channels respectively.

[0011] In some embodiments, the liquid supply channel has a tree-like structure, comprising an inlet and a plurality of outlets, the inlet of the liquid supply channel being connected to the ink cartridge, and the functional liquid having a uniform flow length from the inlet of the liquid supply channel to each outlet of the liquid supply channel;

[0012] There are a plurality of storage flow channels, and the plurality of storage flow channels are respectively communicated with a plurality of direct supply flow channels, and the plurality of storage flow channels are respectively communicated with a plurality of outlets of the liquid supply flow channel.

[0013] In some embodiments, a liquid inlet cavity is further provided in the main body, a rotary flow channel is arranged in the liquid inlet cavity, the liquid inlet hole is communicated with the inlet of the rotary flow channel, and the outlet of the rotary flow channel is communicated with the liquid supply channel.

[0014] In some embodiments, the main body includes a main body plate and an injection plate, and the bottom surface of the main body plate is bonded and fixed to the top surface of the injection plate;

[0015] The liquid supply channel is provided on the bottom surface of the main body plate or the top surface of the injection plate;

[0016] The storage flow channel is opened on the top surface of the injection plate;

[0017] The direct supply channel is opened on the bottom surface of the main body plate;

[0018] The injection holes are all opened on the top surface of the injection plate.

[0019] In some embodiments, the housing comprises:

[0020] A bottom shell, wherein the top of the bottom shell is open, the bottom surface of the bottom shell is provided with a mounting structure for mounting the chip, and the first communication hole is opened through the bottom surface of the bottom shell;

[0021] A mounting seat is inserted into the bottom shell, the mounting seat is fixedly engaged with the bottom shell, a second communicating hole is formed on the top surface of the mounting seat, and the first communicating hole is connected to the second communicating hole; the ink bag is mounted on the mounting seat, and the liquid outlet of the ink bag is connected to the liquid inlet of the chip through the second communicating hole and the first communicating hole;

[0022] A protective shell is provided with an opening at the bottom thereof, the protective shell cover is arranged on the mounting seat, the mounting seat blocks the opening of the protective shell to form the sealed cavity, and the ink sac is located in the sealed cavity.

[0023] In some embodiments, the housing further comprises a connecting structure, and the mounting seat and the bottom shell are fixedly connected by the connecting structure; the connecting structure comprises a first clamping member and a second clamping member, one of the first clamping member and the second clamping member is connected to the inner bottom surface of the bottom shell, and the other is connected to the bottom surface of the mounting seat;

[0024] The first clamping member includes a first clamping strip and at least one first clamping block, the first clamping block is connected to a side surface of the first clamping strip, and the first clamping block includes a first guiding inclined surface and a first limiting surface;

[0025] The second clamping member includes a second clamping strip and at least one second clamping block, the second clamping block is connected to a side surface of the second clamping strip, and the second clamping block includes a second limiting surface;

[0026] Among them, as the mounting seat is inserted into the bottom shell, the first guide bevel pushes the second clip block to make the first clip strip and the second clip strip move away from each other and deform until the first guide bevel is no longer in contact with the second clip block, and then the first clip strip and the second clip strip return to their positions, and the first limiting surface and the second limiting surface are pressed tightly in the insertion direction of the mounting seat.

[0027] In some embodiments, when the first limiting surface and the second limiting surface are pressed against each other, the first clamping strip or the second clamping strip connected to the mounting seat is pressed against the inner bottom surface of the bottom shell.

[0028] In some embodiments, a mounting groove is provided on the top surface of the mounting seat, and the second communication hole is opened at the bottom of the mounting groove;

[0029] The ink bag includes a bag body and a connecting head. The connecting head is inserted into the mounting groove and connected with the second connecting hole, so that the ink bag is plugged and matched with the mounting seat.

[0030] In some embodiments, the housing further includes a connecting tube, which is fixed to the bottom shell, passes through the first connecting hole and the second connecting hole, and is inserted into the ink bag.

[0031] The beneficial effects of the technical solution provided by this application include:

[0032] The embodiment of the present application provides a piezoelectric nozzle. Since the ink cartridge has an ink sac built into its shell, the functional liquid in the ink sac flows out by its own gravity and enters the chip from the liquid inlet of the chip to achieve ink supply to the chip. In addition, the negative pressure device in the through-hole creates a negative pressure environment in the sealed cavity, thereby offsetting the gravity of the functional liquid, so that the functional liquid is in a critical state of outflow, that is, realizing ink supply control to the chip, and whether to supply ink to the chip is achieved by air pressure. Therefore, the ink cartridge can achieve ink supply to the chip without the need for an additional ink supply system, saving space and cost, providing a foundation for the miniaturization and desktopization of inkjet printing equipment, and more conducive to the promotion and application of inkjet printing technology.

[0033] In addition, since the ink cartridge and the chip are arranged separately and then assembled, it is convenient to assemble the ink cartridge and the chip after they are manufactured separately, providing a structural basis for the mass production of piezoelectric nozzles.

[0034] Furthermore, after the functional liquid enters the chip from the liquid inlet hole, the functional liquid flows steadily in the liquid supply channel and then flows into the storage channel. Since the functional liquid first flows in the liquid supply channel, most of the possible bubbles are eliminated as it flows, so there are fewer bubbles in the functional liquid entering the storage channel or even all of them are eliminated.

[0035] Because the inner bottom of the reservoir channel is lower than that of the direct-supply channel, the functional liquid flowing into the reservoir channel accumulates to a certain height before overflowing from the reservoir channel into the direct-supply channel. The functional liquid then flows into the direct-supply channel from its bottom until it accumulates there. This reduces the risk of bubbles forming in the direct-supply channel, ensuring the quality of the functional liquid entering the ejection orifice and, consequently, print quality.

[0036] In a second aspect, an inkjet printing system is provided, comprising the piezoelectric nozzle as described above.

[0037] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the above-mentioned piezoelectric nozzle, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned piezoelectric nozzle, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0039] Figure 1 A schematic diagram of a piezoelectric nozzle provided in an embodiment of the present application;

[0040] Figure 2 A schematic diagram of an ink cartridge provided in an embodiment of the present application;

[0041] Figure 3 Schematic diagram of another perspective of the ink cartridge provided in an embodiment of the present application

[0042] Figure 4 A schematic diagram of the interior of an ink cartridge provided in an embodiment of the present application;

[0043] Figure 5 for Figure 4 Enlarged view of point C in the middle;

[0044] Figure 6 An exploded view of an ink cartridge provided in an embodiment of the present application;

[0045] Figure 7 Exploded view of the ink cartridge from another perspective provided in an embodiment of the present application

[0046] Figure 8 A partial cross-sectional view of the mounting base and the bottom shell provided in an embodiment of the present application;

[0047] Figure 9 A schematic diagram of a chip provided in an embodiment of the present application;

[0048] Figure 10 A schematic diagram of a chip provided in an embodiment of the present application with the protective layer removed;

[0049] Figure 11 An internal schematic diagram of a chip provided in an embodiment of the present application;

[0050] Figure 12 A schematic diagram of part of the internal structure of the chip provided in the embodiment of the present application;

[0051] Figure 13 An exploded view of a chip provided in an embodiment of the present application;

[0052] Figure 14 An exploded view of the chip from another perspective provided in an embodiment of the present application;

[0053] Figure 15 Schematic diagram of the piezoelectric structure provided in an embodiment of the present application.

[0054] In the figure: A, ink cartridge; 1, bottom shell; 1a, first connecting hole; 1b, mounting structure; 11, boss; 2, mounting seat; 2a, second connecting hole; 2b, mounting groove; 2c, limiting groove; 21, connecting sleeve; 22, stop bar; 3, ink sac; 31, sac body; 32, connecting head; 4, protective shell; 41, flange; 5, ventilation structure; 5a, first ventilation hole; 5b, second ventilation hole; 6, connecting structure; 61, first clamping member; 611, first clamping strip; 612, first clamping block; 612a, first guiding slope; 612b, first limiting surface; 62, second clamping member; 621, Second clamping strip; 622, second clamping block; 622a, second guide slope; 622b, second limiting surface; 7, partition; 8, connecting pipe; 9, sealing ring; a, sealing chamber; b, liquid accumulation chamber; B, chip; 10, main body; 101, main body plate; 102, injection plate; 10a, liquid supply channel; 10b, storage channel; 10c, direct supply channel; 10d, injection hole; 10e, rotary channel; 10f, liquid inlet hole; 11, piezoelectric structure; 111, vibration plate; 112, first electrode; 113, piezoelectric film; 114, second electrode; 12, protective layer; 12a, protective chamber. DETAILED DESCRIPTION

[0055] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0056] The present application provides a piezoelectric nozzle and inkjet printing system that utilizes an ink cartridge to directly supply functional fluid to a chip, eliminating the need for an ink supply system. This facilitates miniaturization of the printing device and facilitates the widespread application of inkjet printing technology. Furthermore, the flow path design within the chip prevents bubbles from forming within the functional fluid, ensuring print quality. This application addresses the technical issues in related art whereby the ink cartridge requires an external connection to an ink supply system, hindering the widespread application of inkjet printing technology and causing bubbles to form within the chip, thereby affecting print quality.

[0057] Reference Figure 1 A piezoelectric nozzle includes an ink cartridge A and a chip B. The chip B is mounted on the bottom of the ink cartridge A and is connected to the ink cartridge A. The ink cartridge A supplies functional liquid to the chip B, and the chip B causes the functional liquid to be ejected.

[0058] Reference Figure 2-Figure 4Ink cartridge A comprises a housing, an ink sac 3, and a vent structure 5. The ink sac 3 is located within a sealed chamber a within the housing. A first communication hole 1a is defined at the bottom of the housing. This first communication hole 1a communicates with the ink sac 3, which in turn communicates with the liquid inlet 10f of chip B. The functional liquid within the ink sac 3 flows into chip B under gravity, supplying ink to chip B.

[0059] The vent structure 5 is connected to the sealed cavity a, and the sealed cavity a is connected to the external negative pressure device through the vent structure 5. By applying negative pressure to the sealed cavity a, the gravity of the functional liquid is balanced and the functional liquid is restricted from flowing out of the first communication hole 1a into the chip B.

[0060] This arrangement uses air pressure to control the stress on the functional fluid, keeping it in a critical state of outflow and in a flowing state. This effectively controls the ink supply to chip B, using air pressure to determine whether ink is supplied to chip B. Therefore, ink cartridge A can supply ink to chip B without requiring a separate ink supply system, saving space and costs. This paves the way for miniaturized and desktop inkjet printing equipment, further promoting the widespread application of inkjet printing technology.

[0061] Reference Figure 3 and Figure 4 , wherein the housing includes a bottom shell 1, a mounting seat 2 and a protective shell 4. Therefore, the bottom shell 1, the mounting seat 2, the ink bag 3 and the protective shell 4 are assembled to form the ink cartridge A.

[0062] Reference Figure 4-Figure 7 The bottom shell 1 is open at the top, and the mounting seat 2 is inserted into the bottom shell 1. The ink sac 3 is mounted on the top surface of the mounting seat 2. The bottom of the protective shell 4 is open, and the protective shell 4 covers the mounting seat 2. The mounting seat 2 blocks the opening of the protective shell 4 to form a sealed cavity a, and the ink sac 3 is located within the sealed cavity a. When assembling the bottom shell 1, mounting seat 2, ink sac 3, and protective shell 4, the mounting seat 2 is inserted into the bottom shell 1, and the ink sac 3 is then installed on the mounting seat 2. Finally, the protective shell 4 is placed on the top surface of the mounting seat 2 to complete the assembly of the ink cartridge A.

[0063] In this arrangement, the bottom shell 1, mounting base 2, ink sac 3, and protective shell 4 are arranged separately and assembled to form the ink cartridge A. This facilitates batch manufacturing of the various components of the ink cartridge A and subsequent assembly, thereby reducing the cost of the ink cartridge A and meeting consumer demand for mass production of the ink cartridge A. Furthermore, the assembly steps of the ink cartridge A are simple, efficient, and low-cost.

[0064] Reference Figure 1 、 Figure 4-Figure 7The bottom surface of the bottom case 1 is provided with a mounting structure 1b for mounting chip B. In this embodiment, the mounting structure 1b comprises an embedding groove into which chip B is adhesively secured. A first communication hole 1a is formed through the bottom surface of the bottom case 1 and is located at the bottom of the embedding groove. The first communication hole 1a is connected to the liquid inlet 10f of chip B.

[0065] A second communication hole 2a is formed through the top surface of the mounting base 2, communicating with the first communication hole 1a. After the ink sac 3 is installed in the mounting base 2, the liquid outlet of the ink sac 3 communicates with the second communication hole 2a. This connects the ink sac 3 to the liquid inlet 10f of the chip B.

[0066] With this arrangement, the ink sac 3 can be connected to the chip B, thus realizing the liquid supply basis of the ink sac 3 to the chip B.

[0067] The ventilation structure 5 is directly connected to the protective shell 4. Specifically, air holes are opened on the side of the protective shell 4.

[0068] Reference Figure 4-Figure 7 In this embodiment, the ventilation structure 5 includes a first ventilation hole 5a and a second ventilation hole 5b.

[0069] The first vent hole 5a is formed through the edge of the bottom surface of the bottom shell 1. The second vent hole 5b is formed through the mounting seat 2, and the first vent hole 5a is communicated with the second vent hole 5b, and the second vent hole 5b is communicated with the sealed cavity a.

[0070] In this arrangement, the interface for providing a negative pressure environment to the sealed chamber a is not easily blocked by being connected to the external negative pressure device at the bottom surface of the bottom shell 1, and the position layout is more reasonable.

[0071] Reference Figure 4-Figure 7 Furthermore, the height of the first vent hole 5a provided on the bottom plate of the bottom shell 1 is higher than the height of the first connecting hole 1a provided on the bottom plate of the bottom shell 1, that is, one edge of the bottom plate of the bottom shell 1 is bent upward to form a step to leave installation space below the first vent hole 5a provided on the bottom shell 1.

[0072] In this way, by reserving installation space for the installation of the ventilation end of the external negative pressure device, the connector of the negative pressure device is placed in the installation space. Therefore, when the chip B is installed in the installation structure 1b of the bottom shell 1, the chip B is at the lowest position of the ink cartridge A, and the connector of the external negative pressure device is prevented from affecting the printing height.

[0073] It should be noted that the distance between chip B and the substrate is the printing height. After chip B is installed on cartridge A, chip B is at the lowest position of cartridge A, ensuring that chip B can be as close to the substrate as possible.

[0074] The mounting base 2 is plugged into the bottom shell 1 and fixed with the bottom shell 1 .

[0075] This arrangement allows the mounting base 2 to be directly inserted into the bottom case 1 and secured by snapping, facilitating assembly of the mounting base 2 and the bottom case 1. Furthermore, it facilitates alignment of the second communication hole 2a of the mounting base 2 with the first communication hole 1a of the bottom case 1, eliminating the need for additional alignment.

[0076] Reference Figure 4 、 Figure 6-Figure 8 The shell further includes a connecting structure 6 , through which the mounting base 2 and the bottom shell 1 are fixed together.

[0077] Reference Figure 4 、 Figure 6-Figure 8 The connecting structure 6 includes a first clamping member 61 and a second clamping member 62. One of the first clamping member 61 and the second clamping member 62 is mounted on the inner bottom surface of the bottom shell 1, and the other is mounted on the bottom surface of the mounting base 2. In this embodiment, the first clamping member 61 is mounted on the bottom surface of the mounting base 2, and the second clamping member 62 is mounted on the inner bottom surface of the bottom shell 1.

[0078] The first clamping member 61 includes a first clamping strip 611 and at least one first clamping block 612. The first clamping block 612 is fixed to the side of the first clamping strip 611. The first clamping block 612 includes a first guiding inclined surface 612a and a first limiting surface 612b. In this embodiment, the limiting surface is the top surface of the first clamping block 612, and the first guiding inclined surface 612a is a side surface of the first clamping block 612.

[0079] The second clamping member 62 includes a second clamping strip 621 and at least one second clamping block 622. The second clamping block 622 is fixed to the side of the second clamping strip 621 and includes a second limiting surface 622b. In this embodiment, the second limiting surface 622b is the bottom surface of the second clamping block 622.

[0080] As the mounting base 2 is inserted into the bottom housing 1, the first guide slope 612a pushes against the second clamping block 622, causing the first clamping strip 611 and the second clamping strip 621 to move away from each other and deform until the first guide slope 612a no longer contacts the second clamping block 622. The first clamping strip 611 and the second clamping strip 621 then return to their original positions, and the first limiting surface 612b and the second limiting surface 622b press against each other in the insertion direction of the mounting base 2.

[0081] With this arrangement, under the abutment effect of the first limiting surface 612 b and the second limiting surface 622 b , the mounting seat 2 is limited to be away from the bottom shell 1 , thereby achieving fixation of the mounting seat 2 and the bottom shell 1 .

[0082] Furthermore, when the first limiting surface 612 b and the second limiting surface 622 b are pressed against each other, the first clamping strip 611 or the second clamping strip 621 connected to the mounting seat 2 is pressed against the inner bottom surface of the bottom shell 1 .

[0083] In this embodiment, when the first limiting surface 612 b and the second limiting surface 622 b are pressed tightly together, the first clamping strip 611 is pressed tightly against the inner bottom surface of the bottom shell 1 .

[0084] With this arrangement, the first clamping member 61 is pressed against the bottom shell 1 by the first clamping strip 611, and the first clamping block 612 is pressed against the second clamping block 622. Therefore, in the insertion direction of the mounting seat 2, the first clamping member 61 and the second clamping member 62 cannot move relative to each other, so the mounting seat 2 and the bottom shell 1 are more firmly fixed.

[0085] Reference Figure 4 、 Figure 6-Figure 8 Preferably, the second clamping block 622 includes a second guiding slope 622a, which is on the side of the second clamping block 622. When the mounting base 2 is inserted into the mounting base 2, the first guiding slope 612a of the first clamping block 612 contacts the second guiding slope 622a of the second clamping block 622, so that the first clamping block 612 and the second clamping block 622 can push each other more smoothly, and the first clamping strip 611 and the second clamping strip 621 can be pushed and deformed more easily, thereby facilitating the assembly process of the mounting base 2 and the bottom case 1.

[0086] Preferably, two first clamping blocks 612 are provided, and the two first clamping blocks 612 are arranged on the first clamping strip 611 at intervals along the insertion direction of the mounting seat 2 .

[0087] With this arrangement, after the mounting base 2 and the bottom case 1 are assembled, the second clamping block 622 is located between the two first clamping blocks 612, with the first guide slope 612a of the upper first clamping block 612 abutting against the second guide slope 622a of the second clamping block 622, and the first limiting surface 612b of the lower first clamping block 612 engaging with the second limiting surface 622b of the second clamping block 622. By tightening the second clamping block 622, the mounting base 2 and the bottom case 1 are more firmly fixed.

[0088] Reference Figure 4 、 Figure 6-Figure 8 Furthermore, multiple sets of connecting structures 6 are provided. In this embodiment, two sets of connecting structures 6 are provided, and the two sets of connecting structures 6 are located on both sides of the first communication hole 1a. The multiple sets of connecting structures 6 secure the mounting base 2 and the bottom shell 1, ensuring that the bottom shell 1 and the mounting base 2 are more integrated after being fixed and are less likely to shake.

[0089] The top surface of the mounting seat 2 is provided with a mounting groove 2b, and the second communication hole 2a is opened at the bottom of the mounting groove 2b.

[0090] The ink bag 3 includes a bag body 31 and a communication head 32 . The communication head 32 is inserted into the mounting groove 2 b and communicates with the second communication hole 2 a so that the ink bag 3 is plugged into and matched with the mounting seat 2 .

[0091] With this arrangement, the ink bag 3 is plugged into the mounting seat 2, which facilitates the fixation of the ink bag 3 and the communication between the ink bag 3 and the second communication hole 2a of the mounting seat 2, without the need for additional structure to connect the ink bag 3 and the mounting seat 2.

[0092] Reference Figure 4 、 Figure 6-Figure 8 Furthermore, a limiting groove 2c is arranged on the top surface of the mounting seat 2, and the length direction of the limiting groove 2c is arranged along the length direction of the mounting seat 2. The capsule 31 is suitable for being inserted into the limiting groove 2c to limit the capsule 31.

[0093] Specifically, in this embodiment, multiple groups of clamping blocks are fixed to the top surface of the mounting base 2. Each group of clamping blocks has two clamping blocks, and the two clamping blocks are spaced apart to form a limiting groove 2c between the two clamping blocks. In other embodiments, the limiting groove 2c is formed by cutting a groove on the surface of the mounting base 2.

[0094] The body 31 of the ink bag 3 is inserted into the limiting groove 2c to limit the installation position of the ink bag 3, so that the ink bag 3 can be easily installed in the protective shell 4 when the protective shell 4 is assembled.

[0095] Specifically, a portion of the mounting seat 2 is recessed to form a mounting groove 2b, and a downwardly protruding connecting sleeve 21 is simultaneously formed.

[0096] This arrangement allows the ink sac 3 to be inserted into the mounting groove 2b, allowing the ink sac 3 to be assembled with the mounting base 2. Furthermore, the connecting sleeve 21 abuts against the inner bottom surface of the bottom shell 1, thereby connecting the first connecting hole 1a and the second connecting hole 2a to form a flow path for the functional fluid within the ink sac 3. This improves the structural utilization of the connecting sleeve 21.

[0097] Reference Figure 4 、 Figure 6-Figure 8 Furthermore, an upwardly convex boss 11 is provided on the inner bottom surface of the bottom shell 1 , the first communication hole 1 a is opened on the boss 11 and passes through the bottom shell 1 , and the connecting sleeve 21 is tightly pressed against the boss 11 .

[0098] This arrangement prevents the functional liquid seeping from the first connecting hole 1a and the second connecting hole 2a from accumulating at the second connecting hole 2a. After the seeping functional liquid flows from the boss 11 to the inner bottom surface of the bottom shell 1, it will not flow to the second connecting hole 2a due to the restriction of the boss 11, so as to ensure the stability of the functional liquid supply to the chip B.

[0099] Reference Figure 4 、 Figure 6-Figure 8Furthermore, a sealing ring 9 is embedded in the bottom surface of the connecting sleeve 21, and the connecting sleeve 21 is pressed against the boss 11 through the sealing ring 9 to ensure the connection and sealing between the first connecting hole 1a and the second connecting hole 2a.

[0100] Reference Figure 4 、 Figure 6-Figure 8 Furthermore, the ink cartridge A structure also includes two partitions 7, both of which are fixed to the inner bottom surface of the bottom shell 1. The two partitions 7 are located on opposite sides of the boss 11, and the partitions 7 are in contact with the opposite inner side surfaces of the bottom shell 1. A liquid accumulation chamber b is formed between the partitions 7 and the boss 11.

[0101] In this arrangement, the partition 7 is arranged to form a liquid accumulation chamber b, which prevents the leaked functional liquid from flowing freely inside the bottom shell 1 and prevents the functional liquid from seeping out of the ink cartridge A and contaminating the printing substrate. In addition, the arrangement of the partition 7 enhances the strength of the bottom shell 1.

[0102] Preferably, the connecting structure 6 is located outside the fluid collection cavity b.

[0103] Reference Figure 4 、 Figure 6-Figure 8 The shell further includes a connecting pipe 8 , which is fixed to the bottom shell 1 , and passes through the first connecting hole 1 a and the second connecting hole 2 a and is inserted into the ink bag 3 .

[0104] In this embodiment, the bottom shell 1, the boss 11 and the connecting pipe 8 are all integrally formed. In addition, the second clamping member 62 and the partition 7 are all integrally formed with the bottom shell 1 to facilitate manufacturing and processing.

[0105] Reference Figure 4 、 Figure 6-Figure 8 The connecting pipe 8 passes through the mounting seat 2 through the second connecting hole 2a and extends into the ink bag 3.

[0106] This arrangement directly establishes a communication channel between the ink bag 3 and the chip B through the connecting tube 8, which reduces the joints of the functional liquid flow channel, reduces the risk of functional liquid leakage, and makes the ink supply to the chip B more stable.

[0107] In addition, in this embodiment, the connecting tube 8 is inserted into the installation groove 2b of the connecting sleeve 21. After the ink sac 3 is inserted into the installation groove 2b, the connecting tube 8 is also inserted into the ink sac 3, thereby reducing the risk of leakage of the functional liquid of the ink sac 3.

[0108] The connecting pipe 8 passes through the sealing ring 9 and extends into the connecting sleeve 21. When the functional liquid seeps along the outer wall of the connecting pipe 8, the sealing ring 9 restricts the functional liquid attached to the outer wall of the connecting pipe 8 from continuing to flow down.

[0109] The bottom surface of the protective shell 4 fits into the top surface of the mounting base 2 to achieve assembly of the protective shell 4 and the mounting base 2 .

[0110] Reference Figure 4-Figure 6 Specifically, a stop bar 22 is integrally formed at the top edge of the mounting base 2, and a flange 41 is formed at the bottom edge of the protective shell 4. The flange 41 of the protective shell 4 is tightly pressed against the bottom surface of the mounting base 2, and the circumferential side surface of the flange 41 is tightly pressed against the inner side surface of the stop bar 22.

[0111] Reference Figure 4-Figure 6 In addition, the thickness of the stop bar 22 is greater than the thickness of the flange 41. When the protective shell 4 is pressed against the mounting seat 2, the protective shell 4 is fixed to the mounting seat 2 by applying sealant on the surface of the flange 41, thereby ensuring the sealing of the connection.

[0112] With this arrangement, the structure of the stop bar 22 and the flange 41 facilitates subsequent sealing of the connection between the protective shell 4 and the mounting base 2 .

[0113] The working principle and beneficial effects of ink cartridge A are summarized as follows:

[0114] This ink cartridge A is used to supply functional liquid to chip B. The functional liquid in the ink sac 3 flows out due to its own gravity. An external negative pressure device creates a negative pressure environment within the sealed chamber a, thereby offsetting the gravity of the functional liquid and keeping the functional liquid in a critical state of outflow. After the functional liquid in the ink sac 3 is discharged due to gravity, it passes through the second connecting hole 2a of the mounting base 2 and the first connecting hole 1a of the bottom shell 1, and is then supplied to the liquid inlet of chip B. Therefore, this ink cartridge A can achieve both ink supply and ink supply control for chip B without the need for an additional ink supply system, saving space and cost. This provides a foundation for miniaturization and desktop-based inkjet printing equipment, further facilitating the promotion and application of inkjet printing technology.

[0115] In addition, the bottom shell 1, the mounting seat 2, the ink bag 3, and the protective shell 4 are arranged separately and assembled to form the ink cartridge A, which is convenient for the various parts of the ink cartridge A to be assembled after batch manufacturing, so as to save the cost of the ink cartridge A and adapt to the consumer demand for batch production of the ink cartridge A.

[0116] Finally, when the various components are assembled into ink cartridge A, the mounting base 2 is snap-fitted to the bottom shell 1, the ink sac 3 is mounted on the mounting base 2, and finally, the protective shell 4 is sleeved over the ink sac 3 and placed on top of the mounting base 2. The protective shell 4 and mounting base 2 are then bonded together to complete the assembly of ink cartridge A. This assembly process is simple, efficient, and cost-effective. Furthermore, the bottom shell 1, mounting base 2, ink sac 3, and protective shell 4 are all assembled in the same direction, making it easy to develop supporting assembly equipment. This supports mass production of ink cartridges A and facilitates the widespread application of inkjet printing technology.

[0117] Reference Figure 1 、 Figure 9 and Figure 10Chip B is embedded in a groove on the bottom surface of the bottom shell 1, with the top surface of chip B attached to the bottom of the groove. Chip B includes a main body 10 and a piezoelectric structure 11. The piezoelectric structure 11 is arranged on the top surface of the main body 10 and controls the main body 10 to spray the functional liquid.

[0118] Reference Figure 10-12 The main body 10 is internally provided with a liquid supply channel 10a, a storage channel 10b, and a direct supply channel 10c. The liquid supply channel 10a communicates with the external ink cartridge A. The functional liquid in the external ink cartridge A is retained in the liquid supply channel 10a to supply the functional liquid to the chip B. Specifically, a liquid inlet hole 10f is formed on the top surface of the chip B. The liquid inlet hole 10f communicates with the first communication hole 1a of the ink cartridge A. The liquid inlet hole 10f is also connected to the liquid supply channel 10a, allowing the functional liquid in the ink cartridge A to flow into the chip B.

[0119] Reference Figure 10-12 The liquid supply channel 10a, storage channel 10b, and direct supply channel 10c are sequentially connected. Functional liquid flows from the liquid supply channel 10a to the storage channel 10b and then to the direct supply channel 10c. A spray hole 10d is defined within the direct supply channel 10c. A piezoelectric structure 11 is mounted on the top surface of the main body 10. The active end of the piezoelectric structure 11 acts on the direct supply channel 10c, causing the functional liquid within the direct supply channel 10c to be ejected from the spray hole 10d.

[0120] With this arrangement, after the functional liquid enters the liquid supply channel 10a, the functional liquid flows steadily in the liquid supply channel 10a before flowing into the storage channel 10b. Since the functional liquid first flows in the liquid supply channel 10a, most of the bubbles that may exist are eliminated as the functional liquid flows, so there are fewer bubbles in the functional liquid entering the storage channel 10b or even all of them are eliminated.

[0121] Furthermore, multiple direct supply channels 10c are provided, each of which is provided with an ejection hole 10d. This enables array printing. Each of the multiple direct supply channels 10c is connected to the storage channel 10b. Correspondingly, the piezoelectric structure 11 includes multiple active ends, each of which acts on the multiple direct supply channels 10c.

[0122] This arrangement facilitates simultaneous operation of multiple ejection holes 10d, improving printing efficiency. Because the direct flow channels 10c corresponding to different ejection holes 10d are independently configured, when the active end of the piezoelectric structure 11 corresponding to a specific ejection hole 10d operates, adjacent ejection holes 10d are less susceptible to crosstalk, resulting in greater controllability of the ejection holes 10d and ensuring print quality.

[0123] Reference Figure 10-12, wherein the height of the bottom surface of the storage channel 10b is lower than the height of the bottom surface of the direct supply channel 10c, the storage channel 10b is connected to the bottom of the direct supply channel 10c, and the functional liquid in the storage channel 10b overflows and flows into multiple direct supply channels 10c.

[0124] With this arrangement, after the functional liquid accumulates in the storage channel 10b, as the functional liquid further flows into the storage channel 10b, the functional liquid in the storage channel 10b overflows to the bottom of the direct supply channel 10c. As the functional liquid continues to be fed into the storage channel 10b, the functional liquid continues to enter the direct supply channel 10c from bottom to top, filling the direct supply channel 10c. Therefore, when the functional liquid enters the direct supply channel 10c, there is no drop in the functional liquid, and the functional liquid enters the direct supply channel 10c more smoothly. As a result, bubbles are less likely to form in the functional liquid in the direct supply channel 10c, ensuring printing quality.

[0125] Preferably, the top of the storage channel 10b is connected to the direct supply channel 10c, and after the storage channel 10b is filled, the functional liquid enters the direct supply channel 10c.

[0126] Reference Figure 11-14 , wherein the liquid supply channel 10a has a tree-like structure and includes an inlet and multiple outlets. The inlet of the liquid supply channel 10a is used to communicate with the ink cartridge A, and the functional liquid flows from the inlet of the liquid supply channel 10a to each outlet of the liquid supply channel 10a over a uniform flow length. In this embodiment, there is only one storage channel 10b. The multiple outlets of the liquid supply channel 10a are all connected to the storage channel 10b, and the multiple outlets of the liquid supply channel 10a are evenly arranged along the length of the storage channel 10b.

[0127] Specifically, in this embodiment, there is only one storage channel 10b, and the multiple outlets of the liquid supply channel 10a are all connected to the storage channel 10b. The multiple outlets of the liquid supply channel 10a are arranged along a straight line and are evenly spaced along the length of the storage channel 10b. The multiple outlets of the liquid supply channel 10a simultaneously supply functional liquid to multiple locations in the storage channel 10b, making the liquid level height at each location in the storage channel 10b more uniform. Multiple direct supply channels 10c are all connected to the storage channel 10b. When the liquid level rise rate in the storage channel 10b is uniform, the functional liquid overflowing from the storage channel 10b into different direct supply channels 10c is more uniform.

[0128] This arrangement, thanks to the tree-like structure of the liquid supply channel 10a, provides greater consistency in the functional liquid flow rate at different outlets of the liquid supply channel 10a. When the functional liquid is injected into the storage channel 10b, the liquid level rises at a consistent rate across the storage channel 10b, ensuring that the functional liquid overflows into the different direct supply channels 10c at a consistent rate. This results in a more consistent amount of functional liquid within the different direct supply channels 10c, and thus a more consistent state of the functional liquid within the ejection orifices 10d. During printing, the printing consistency across the different ejection orifices 10d is improved, resulting in improved printing quality.

[0129] Reference Figure 11-14 Furthermore, in this embodiment, there are multiple storage channels 10b, and each of the multiple storage channels 10b corresponds to a plurality of direct supply channels 10c. The number of outlets of the liquid supply channel 10a, the number of storage channels 10b, and the number of direct supply channels 10c are the same.

[0130] Reference Figure 11-14 Specifically, the outlet of the liquid supply channel 10a, the storage channel 10b and the direct supply channel 10c correspond one to one and are connected in sequence.

[0131] With this arrangement, the supply channel 10a evenly supplies functional liquid to the multiple storage channels 10b, ensuring a consistent rate of increase of the functional liquid within the multiple storage channels 10b. Furthermore, the functional liquid enters the direct supply channel 10c more consistently from the storage channel 10b, making it easier to ensure the consistency of the functional liquid within the different direct supply channels 10c.

[0132] Reference Figure 11-14 Furthermore, the storage channel 10b is arranged to be widened at one end close to the direct supply channel 10c.

[0133] This arrangement allows the top of the storage channel 10b to communicate with the bottom of the direct supply channel 10c. By widening the end of the storage channel 10b, the connecting area between the two channels is increased, improving the efficiency of the functional fluid entering the direct supply channel 10c. Furthermore, excessively fast functional fluid flow, which can lead to turbulence, is less likely to occur, reducing the likelihood of bubbles forming within the direct supply channel 10c.

[0134] Reference Figure 11-14 , wherein the height of the liquid supply channel 10a is higher than the height of the storage channel 10b, and the functional liquid flows down from the outlet of the liquid supply channel 10a to the storage channel 10b.

[0135] This arrangement, through the height difference between the supply channel 10a and the storage channel 10b, prevents the functional liquid in the supply channel 10a from being directly fed into the storage channel 10b. The storage channel 10b collects the functional liquid, and the kinetic energy of the functional liquid in the supply channel 10a is less likely to be transferred to the storage channel 10b. Therefore, the functional liquid in the storage channel 10b is less susceptible to impact, resulting in a more stable flow and less prone to bubbles. Furthermore, the functional liquid in the storage channel 10b can more stably overflow into the direct supply channel 10c.

[0136] Reference Figure 11-14 A liquid inlet cavity is further provided in the main body 10, the liquid inlet hole 10f is connected to the liquid inlet cavity, the liquid supply channel 10a is connected to the liquid inlet cavity, and the functional liquid flows from the liquid inlet cavity into the liquid supply channel 10a.

[0137] Specifically, the functional liquid enters the liquid inlet cavity from the liquid inlet hole 10f, and then enters the liquid supply channel 10a from the liquid inlet cavity.

[0138] This arrangement and layout of the liquid inlet cavity leave a buffer space for the functional liquid entering the chip B, thereby preventing the functional liquid from overflowing the chip B due to not entering the liquid supply channel 10a in time.

[0139] Furthermore, a rotation channel 10e is arranged in the liquid inlet cavity, the inlet of the rotation channel 10e is communicated with the liquid inlet hole 10f, and the outlet of the rotation channel 10e is communicated with the liquid supply channel 10a.

[0140] Reference Figure 11-14 Specifically, after the functional liquid enters the swirling channel 10e, it circulates in the swirling channel 10e and then enters the liquid supply channel 10a from the inlet of the liquid supply channel 10a.

[0141] With this arrangement, after the functional liquid enters the chip B, it flows in the rotary channel 10e, making the flow direction of the functional liquid more stable during the flow process, and the functional liquid is not easily splashed, thereby reducing bubbles.

[0142] In this embodiment, the width of the revolving channel 10e is not less than the width of the inlet of the liquid supply channel 10a. Preferably, the width of the revolving channel 10e gradually narrows as the functional liquid flows toward the liquid supply channel 10a. This gradually stabilizes the flow, allowing the functional liquid to enter the liquid supply channel 10a more stably.

[0143] Reference Figure 11-14 The main body 10 includes a main plate 101 and an injection plate 102. The bottom surface of the main plate 101 is bonded to the top surface of the injection plate 102. In this embodiment, the main plate 101 and the injection plate 102 are fixed by gold-tin bonding.

[0144] Reference Figure 11-14Specifically, the liquid supply channel 10a is provided on the bottom surface of the main body plate 101 or the top surface of the injection plate 102; the storage channel 10b is provided on the top surface of the injection plate 102, and the bottom surface of the main body plate 101 blocks the top of the storage channel 10b. In some embodiments, when there is no height difference between the liquid supply channel 10a and the storage channel 10b, the liquid supply channel 10a is provided on the top surface of the injection plate 102, and in this case, the bottom surface of the main body plate 101 blocks the top of the liquid supply channel 10a. In this embodiment, the liquid supply channel 10a is provided on the bottom surface of the main body plate 101, the injection plate 102 blocks the bottom of the liquid supply channel 10a, and one end of the liquid supply channel 10a is connected to the storage channel 10b.

[0145] The direct supply channel 10c is formed on the bottom surface of the main plate 101, and the bottom of the direct supply channel 10c is blocked by the injection plate 102. Since the direct supply channel 10c is formed on the main plate 101 and the storage channel 10b is formed on the injection plate 102, a height difference is formed between the storage channel 10b and the direct supply channel 10c.

[0146] The injection holes 10d are all opened on the top surface of the injection plate 102, that is, the injection holes 10d are opened at the bottom of the direct supply channel 10c.

[0147] Correspondingly, the liquid inlet cavity is formed at the bottom of the main body plate 101 , and the liquid inlet hole 10 f is formed at the top surface of the main body plate 101 and communicates with the liquid inlet cavity.

[0148] With this arrangement, the main plate 101 and the ejection plate 102 are combined to form the main body 10. By machining various structures on the surfaces of the main plate 101 and the ejection plate 102, and then bonding them together, the flow channels and other structures within the main body 10 can be formed. This facilitates the processing and forming of the main body 10, enabling MEMS processing. Furthermore, it facilitates the separate manufacture of the main plate 101 and the ejection plate 102, improving the production efficiency of the main body 10 and enabling mass production of the main body 10.

[0149] In this embodiment, the main plate 101 and the injection plate 102 are both silicon plates.

[0150] Reference Figure 10 、 Figure 14 and Figure 15 , wherein the piezoelectric structure 11 includes a vibration plate 111 , a first electrode 112 , a plurality of piezoelectric films 113 and a plurality of second electrodes 114 .

[0151] Reference Figure 10 、 Figure 14 and Figure 15, the vibration plate 111 covers the top surface of the main body 10, the top opening of the direct supply channel 10c is arranged, and the vibration plate 111 blocks the top opening of the direct supply channel 10c. The first electrode 112 covers and is fixed on the surface of the vibration plate 111. Multiple piezoelectric films 113 are all connected to the surface of the first electrode 112, and the multiple piezoelectric films 113 are respectively located directly above the multiple direct supply channels 10c. Multiple second electrodes 114 are respectively connected to the surfaces of the multiple piezoelectric films 113. Multiple piezoelectric films 113 constitute multiple active ends of the piezoelectric structure 11, and the multiple piezoelectric films 113 act on the multiple direct supply channels 10c respectively.

[0152] With this configuration, the piezoelectric film 113 is powered by the first electrode 112 and the second electrode 114. Different piezoelectric films 113 are activated by individually controlling different second electrodes 114. The piezoelectric films 113 vibrate the vibration plate 111, squeezing the functional fluid within the direct supply channel 10c, causing it to be ejected from the ejection orifice 10d.

[0153] In addition, only one first electrode 112 is provided to power multiple piezoelectric films 113, which simplifies the power supply structure of the piezoelectric film 113 and facilitates the processing of the piezoelectric structure 11. In other embodiments, multiple first electrodes 112 are provided, and each piezoelectric film 113 corresponds to one first electrode 112.

[0154] Furthermore, the chip B includes a barrier layer, which is located between the main body 10 and the piezoelectric structure 11. Specifically, the barrier layer is located between the top surface of the main plate 101 and the vibration plate 111. The barrier layer is formed on the top surface of the main plate 101 by magnetron sputtering. In this embodiment, the barrier layer comprises silicon dioxide.

[0155] In this way, the barrier layer is provided to protect the main body plate 101.

[0156] Reference Figure 9 and Figure 11 Furthermore, the chip B further includes a protective layer 12, which covers the top surface of the main body 10. The protective layer 12 includes a protective cavity 12a, and the piezoelectric structure 11 is located in the protective cavity 12a. The protective layer 12 does not block the liquid inlet 10f.

[0157] Specifically, the protective layer 12 includes polymer materials, sol, gel, etc.

[0158] In this configuration, the piezoelectric structure 11 and the surface of the main body 10 are protected by the protective layer 12 .

[0159] The overall workflow and results of Chip B are summarized as follows:

[0160] After the functional liquid enters the liquid supply channel 10a, the functional liquid flows steadily in the liquid supply channel 10a and then flows into the storage channel 10b. Since the functional liquid first flows in the liquid supply channel 10a, most of the bubbles that may exist are eliminated as the functional liquid flows, so there are fewer bubbles in the functional liquid entering the storage channel 10b or even all of them are eliminated.

[0161] Because the inner bottom of storage channel 10b is lower than that of direct-supply channel 10c, functional liquid flowing into storage channel 10b accumulates to a certain height before overflowing from storage channel 10b into direct-supply channel 10c. Furthermore, the functional liquid flows into direct-supply channel 10c from its bottom until it accumulates within the channel. Therefore, bubbles are less likely to form when the functional liquid enters direct-supply channel 10c, ensuring the quality of the functional liquid entering ejection orifice 10d and, consequently, ensuring printing quality.

[0162] Furthermore, since each ejection hole 10d corresponds to a direct supply channel 10c, each ejection hole 10d is supplied with liquid by an independent direct supply channel 10c. The active end of the piezoelectric structure 11 acts on the functional liquid within the direct supply channel 10c, causing the functional liquid to be ejected from the ejection hole 10d. Since the direct supply channels 10c corresponding to different ejection holes 10d are independently provided, when the active end of the piezoelectric structure 11 corresponding to a specific ejection hole 10d is in operation, adjacent ejection holes 10d are less susceptible to crosstalk, resulting in higher controllability of the ejection holes 10d and ensuring print quality.

[0163] The embodiment of the present application provides a piezoelectric nozzle. Because the shell of ink cartridge A contains an ink sac 3, the functional liquid in the ink sac 3 flows out by its own gravity and enters chip B through the liquid inlet of chip B, thereby supplying ink to chip B. Furthermore, a negative pressure device in the through-hole creates a negative pressure environment within sealed chamber a, thereby offsetting the gravity of the functional liquid and placing the functional liquid in a critical state of outflow. This controls the ink supply to chip B, controlling whether ink is supplied to chip B through air pressure. Therefore, ink cartridge A can supply ink to chip B without the need for an additional ink supply system, saving space and cost. This provides a foundation for miniaturization and desktop-based inkjet printing equipment, further facilitating the promotion and application of inkjet printing technology.

[0164] In addition, since the ink cartridge A and the chip B are arranged separately and then assembled, it is convenient to assemble the ink cartridge A and the chip B after they are manufactured separately, providing a structural basis for the mass production of piezoelectric nozzles.

[0165] Furthermore, after the functional liquid enters the chip B from the liquid inlet 10f, the functional liquid flows steadily in the liquid supply channel 10a and then flows into the storage channel 10b. Since the functional liquid first flows in the liquid supply channel 10a, most of the possible bubbles are eliminated as it flows, so the bubbles in the functional liquid entering the storage channel 10b are fewer or even completely eliminated.

[0166] Because the inner bottom of storage channel 10b is lower than that of direct-supply channel 10c, functional liquid flowing into storage channel 10b accumulates to a certain height before overflowing from storage channel 10b into direct-supply channel 10c. Furthermore, the functional liquid flows into direct-supply channel 10c from its bottom until it accumulates within the channel. Therefore, bubbles are less likely to form when the functional liquid enters direct-supply channel 10c, ensuring the quality of the functional liquid entering ejection orifice 10d and, consequently, ensuring printing quality.

[0167] Another embodiment of the present application provides an inkjet printing system, including the piezoelectric nozzle as described above.

[0168] Another embodiment of the present application provides an inkjet printing system. Since the inkjet printing system includes the above-mentioned piezoelectric nozzle, the beneficial effects of the inkjet printing system are consistent with the beneficial effects of the above-mentioned piezoelectric nozzle, which will not be repeated here.

[0169] In the description of this application, it should be noted that the terms "upper" and "lower" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. Unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances.

[0170] It should be noted that, in this application, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the sentence "comprising a ..." does not exclude the presence of other identical elements in the process, method, article or device comprising the element.

[0171] The foregoing is merely a list of specific embodiments of the present application, intended to enable those skilled in the art to understand or implement the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application is not limited to the embodiments shown herein, but is intended to conform to the broadest scope consistent with the principles and novel features of the present application.

Claims

1. A piezoelectric nozzle, characterized in that: It includes: An ink cartridge comprising a housing, an ink sac, and a vent structure, wherein the ink sac is located in a sealed cavity within the housing, a first communication hole is defined at the bottom of the housing, and the ink sac is in communication with the first communication hole; the vent structure is in communication with the sealed cavity, and the sealed cavity is in communication with an external negative pressure device via the vent structure; A chip is mounted on the bottom surface of the shell, and the chip includes a main body and a piezoelectric structure; a liquid supply channel, a storage channel and a direct supply channel are provided in the main body, and the liquid supply channel, the storage channel and the direct supply channel are connected in sequence; the height of the inner bottom surface of the storage channel is lower than the height of the inner bottom surface of the direct supply channel, the storage channel is connected with the bottom of the direct supply channel, and the functional liquid in the storage channel overflows and flows into the direct supply channel; a liquid inlet hole connected with the liquid supply channel is provided on the top surface of the chip, and the liquid inlet hole is connected with the first connecting hole; a spray hole is provided on the inner bottom surface of the direct supply channel; the piezoelectric structure is arranged on the top surface of the main body, and the active end of the piezoelectric structure acts on the direct supply channel to make the functional liquid in the direct supply channel spray out from the spray hole.

2. The piezoelectric nozzle according to claim 1, characterized in that: There are multiple direct supply flow channels, each of which is provided with the injection hole, and the multiple direct supply flow channels are connected to the storage flow channel; the piezoelectric structure includes multiple active ends, and the multiple active ends of the piezoelectric structure act on the multiple direct supply flow channels respectively.

3. The piezoelectric nozzle according to claim 2, characterized in that: The liquid supply channel has a tree-like structure, comprising an inlet and a plurality of outlets, wherein the inlet of the liquid supply channel is used to communicate with the ink cartridge, and the functional liquid flows from the inlet of the liquid supply channel to each outlet of the liquid supply channel over a consistent flow length; There are a plurality of storage flow channels, and the plurality of storage flow channels are respectively communicated with a plurality of direct supply flow channels, and the plurality of storage flow channels are respectively communicated with a plurality of outlets of the liquid supply flow channel.

4. The piezoelectric nozzle according to claim 1, characterized in that: A liquid inlet cavity is further provided in the main body, a rotary flow channel is arranged in the liquid inlet cavity, the liquid inlet hole is communicated with the inlet of the rotary flow channel, and the outlet of the rotary flow channel is communicated with the liquid supply channel.

5. The piezoelectric nozzle according to any one of claims 1 to 4, characterized in that: The main body portion includes a main body plate and an injection plate, wherein the bottom surface of the main body plate is bonded and fixed to the top surface of the injection plate; The liquid supply channel is provided on the bottom surface of the main body plate or the top surface of the injection plate; The storage flow channel is opened on the top surface of the injection plate; The direct supply channel is opened on the bottom surface of the main body plate; The injection holes are all opened on the top surface of the injection plate.

6. The piezoelectric nozzle according to claim 1, characterized in that: The housing comprises: A bottom shell, wherein the top of the bottom shell is open, the bottom surface of the bottom shell is provided with a mounting structure for mounting the chip, and the first communication hole is opened through the bottom surface of the bottom shell; A mounting seat is inserted into the bottom shell, the mounting seat is fixedly engaged with the bottom shell, a second communicating hole is formed on the top surface of the mounting seat, and the first communicating hole is connected to the second communicating hole; the ink bag is mounted on the mounting seat, and the liquid outlet of the ink bag is connected to the liquid inlet of the chip through the second communicating hole and the first communicating hole; A protective shell is provided with an opening at the bottom thereof, the protective shell cover is arranged on the mounting seat, the mounting seat blocks the opening of the protective shell to form the sealed cavity, and the ink sac is located in the sealed cavity.

7. The piezoelectric nozzle according to claim 1, characterized in that: The housing further comprises a connecting structure, through which the mounting seat and the bottom shell are fixedly connected; the connecting structure comprises a first clamping member and a second clamping member, one of the first clamping member and the second clamping member is connected to the inner bottom surface of the bottom shell, and the other is connected to the bottom surface of the mounting seat; The first clamping member includes a first clamping strip and at least one first clamping block, the first clamping block is connected to a side surface of the first clamping strip, and the first clamping block includes a first guiding inclined surface and a first limiting surface; The second clamping member includes a second clamping strip and at least one second clamping block, the second clamping block is connected to a side surface of the second clamping strip, and the second clamping block includes a second limiting surface; Among them, as the mounting seat is inserted into the bottom shell, the first guide bevel pushes the second clip block to make the first clip strip and the second clip strip move away from each other and deform until the first guide bevel is no longer in contact with the second clip block, and then the first clip strip and the second clip strip return to their positions, and the first limiting surface and the second limiting surface are pressed tightly in the insertion direction of the mounting seat.

8. The piezoelectric nozzle according to claim 7, characterized in that: When the first limiting surface and the second limiting surface are pressed against each other, the first clamping strip or the second clamping strip connected to the mounting seat is pressed against the inner bottom surface of the bottom shell.

9. The piezoelectric nozzle according to claim 6, characterized in that: The top surface of the mounting seat is provided with a mounting groove, and the second communicating hole is opened at the bottom of the mounting groove; The ink bag includes a bag body and a connecting head. The connecting head is inserted into the mounting groove and connected with the second connecting hole, so that the ink bag is plugged and matched with the mounting seat.

10. The piezoelectric nozzle according to any one of claims 6 to 9, characterized in that: The housing further includes a communicating pipe, which is fixed to the bottom shell and passes through the first communicating hole and the second communicating hole and is inserted into the ink bag.

11. An inkjet printing system, characterized in that: The piezoelectric nozzle comprises the piezoelectric nozzle according to any one of claims 1 to 10.

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