Assembled substrate and liquid ejection device having the same

Abstract

The utility model provides a kind of assembled substrate and the liquid ejection device with assembled substrate, liquid ejection device includes injection part, including multiple nozzles of injection liquid;Assembled substrate includes first substrate and second substrate, first substrate has a first joint surface, first open cavity is equipped on the first joint surface, second substrate has a second joint surface, second open cavity is equipped on the second joint surface, first substrate and second substrate are detachably assembled, first joint surface and second joint surface are attached, and first open cavity and second open cavity are aligned and combined, and constitute a continuous liquid passage, continuous liquid passage is communicated with injection part, to guide liquid from continuous liquid passage to injection part. Using assembled substrate can facilitate the processing of continuous liquid passage, reduce the maintenance difficulty and cost of continuous liquid passage, and facilitate the recycling of first substrate and second substrate.

Description

Technical Field

[0001] This utility model relates to the field of liquid jetting technology, and in particular to a modular substrate and a liquid jetting device having a modular substrate. Background Technology

[0002] The current printhead substrate is a one-piece structure. The internal flow channels of this one-piece substrate are machined using processes such as deep hole drilling, which presents significant manufacturing challenges in achieving high precision. Furthermore, once the internal flow channels of this one-piece structure become clogged or contaminated, effective cleaning is virtually impossible, rendering the entire expensive printhead unusable and resulting in extremely high maintenance costs. This presents problems such as high manufacturing costs, low yield rates, and high maintenance difficulty and costs once the internal flow channels are clogged or contaminated. Utility Model Content

[0003] This invention addresses the problems existing in the prior art by providing a modular substrate and a liquid ejection device with a modular substrate. The modular substrate facilitates the fabrication of continuous liquid channels, reduces the maintenance difficulty and cost of the continuous liquid channels, and facilitates the recycling of the first and second substrates.

[0004] This utility model provides a liquid ejection device with an assembled substrate, comprising: an ejection section including a plurality of nozzles for ejecting liquid; an assembled substrate including a first substrate and a second substrate, the first substrate having a first mating surface and a first open cavity provided on the first mating surface; the second substrate having a second mating surface and a second open cavity provided on the second mating surface; wherein the first substrate and the second substrate are detachably assembled, the first mating surface and the second mating surface are in contact, and the first open cavity and the second open cavity are aligned and combined to form a continuous liquid channel; wherein the continuous liquid channel communicates with the ejection section to guide liquid from the continuous liquid channel to the ejection section.

[0005] In one embodiment, the first substrate is provided with a first connection hole, and the second substrate is provided with a second connection hole corresponding to the position of the first connection hole. The first connection hole and the second connection hole are connected by a connector.

[0006] In one embodiment, the nozzle is configured to spray liquid along a first direction, the first substrate and the second substrate are joined together along the first direction, the second substrate is connected to the spraying part, and the dimension of the first substrate along the first direction is larger than the dimension of the second substrate along the first direction.

[0007] In one embodiment, the nozzle is configured to spray liquid along a first direction, a plurality of the nozzles are arranged along a second direction and at least in a row, the first substrate and the second substrate are spliced ​​together along the first direction, and the first open cavity includes a liquid inlet channel and a first cavity that communicates with the liquid inlet channel and extends continuously along the second direction; The second open cavity extends through the second substrate along the first direction. The second open cavity includes a second cavity, a connecting cavity, and a mounting cavity for mounting the spraying part, which are arranged and connected in sequence along the first direction. The outer contour projections of the first cavity and the second cavity in the first direction coincide and are connected along the first direction to form a liquid storage cavity.

[0008] In one embodiment, any cross-sectional profile of the liquid storage cavity is convex, and the minimum radius of curvature of the cross-sectional profile is greater than zero.

[0009] In one embodiment, the second cavity has a strip-shaped opening that communicates with the connecting cavity, and the connection between the second cavity and the connecting cavity is a smooth connection; And / or, the connection between the liquid inlet channel and the first cavity is a smooth connection.

[0010] In one implementation, the projections of the center lines of the first substrate, the second substrate, the first cavity, the second cavity, the communicating cavity, and the mounting cavity along the second direction coincide in the first direction.

[0011] In one embodiment, the nozzle is configured to spray liquid along a first direction, and a plurality of the nozzles are arranged along a second direction and at least in a row, the second direction intersecting the first direction, the first substrate and the second substrate being spliced ​​along the first direction or the second direction, or the first substrate and the second substrate being spliced ​​along a third direction, the third direction intersecting the first direction and the second direction respectively.

[0012] In one embodiment, the nozzle is configured to spray liquid along a first direction, and a plurality of the nozzles are arranged along a second direction and at least in a row, the second direction intersecting the first direction. The continuous liquid channel includes a liquid inlet channel extending along the first direction, a liquid storage chamber extending continuously along the second direction, and a connecting chamber that are sequentially arranged and connected along the first direction. The connecting chamber is connected to the plurality of nozzles. The modular substrate is provided with a mounting cavity for mounting the spraying part. The mounting cavity is formed in at least one of the first substrate and the second substrate, and the mounting cavity is connected to the continuous liquid channel.

[0013] This utility model also provides a modular substrate for a liquid ejection device. The modular substrate is as described above, comprising a first substrate and a second substrate. The first substrate has a first mating surface and a first open cavity is provided on the first mating surface. The second substrate has a second mating surface and a second open cavity is provided on the second mating surface. The first substrate and the second substrate are detachably assembled, the first mating surface and the second mating surface are in contact, and the first open cavity and the second open cavity are aligned and combined to form a continuous liquid channel.

[0014] By adopting the above structure, this utility model has the following advantages compared with the prior art: The liquid ejection device includes an ejector section and an assembled substrate. The assembled substrate includes a first substrate and a second substrate. The first substrate has a first mating surface with a first open cavity. The second substrate has a second mating surface with a second open cavity. The first substrate and the second substrate are detachably assembled, with the first mating surface and the second mating surface in contact. The first open cavity and the second open cavity are aligned and combined to form a continuous liquid channel. The continuous liquid channel communicates with the ejector section to guide liquid from the continuous liquid channel to the ejector section. Compared to existing integrated substrate structures, using an assembled substrate facilitates the fabrication of the continuous liquid channel, reduces the maintenance difficulty and cost of the continuous liquid channel, and facilitates the recycling of the first and second substrates. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural schematic diagram of the liquid ejection device according to an embodiment of this application; Figure 2 for Figure 1 A three-dimensional structural diagram omitting the outer shell; Figure 3 for Figure 2 Top view; Figure 4 for Figure 3 A cross-sectional view along the AA direction; Figure 5 for Figure 3 A cross-sectional view along the BB direction; Figure 6 This is a three-dimensional structural schematic diagram of the first substrate according to an embodiment of this application; Figure 7 This is a three-dimensional structural schematic diagram of the second substrate according to an embodiment of this application; Figure 8 yes Figure 7 A three-dimensional structural diagram of the second substrate from another angle. In the attached figures: 1. Assembled substrate; 1a. First substrate; 1b. Second substrate; 11. First open cavity; 111. Liquid inlet channel; 112. First cavity; 113. Second open cavity; 12. Second cavity; 121. Strip opening; 1211. 122. Connecting cavity; 123. Mounting cavity; 13. Liquid storage cavity; 14. First mating surface; 15. Second mating surface; 16. First connecting hole; 17. Second connecting hole; 2. Spraying section; 21. Nozzle; 3. Outer shell; 100. Detailed Implementation

[0016] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0017] In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0018] The assembled substrate 1, including a first substrate 1a and a second substrate 1b, is the basic structure providing macroscopic mechanical support for the jetting section 2 and facilitating the collection and distribution of large-volume liquids. It is typically manufactured using precision machining, laser processing, injection molding, electroforming, and other technologies, with characteristic dimensions ranging from millimeters to centimeters. The assembly of the assembled substrate 1 in this application differs from the layered assembly of the jetting section 2. The jetting section 2 is the microscopic core component performing liquid jetting, usually manufactured using micro-hole processing and semiconductor micro / nano-fabrication processes. Typical characteristic dimensions of structures such as the nozzle 21 and internal flow channels are at the micrometer level. The overall dimensions of the assembled substrate 1 in this application are also much larger than those of the jetting section 2 layer.

[0019] Example 1 like Figure 1-8As shown in the figure, this application provides a liquid ejection device 100 with a modular substrate, including an ejection section 2 and a modular substrate 1. The ejection section 2 includes a plurality of nozzles 21 for ejecting liquid. The modular substrate 1 includes a first substrate 1a and a second substrate 1b. The first substrate 1a has a first mating surface 14, on which a first open cavity 11 is provided. The second substrate 1b has a second mating surface 15, on which a second open cavity 12 is provided. The first substrate 1a and the second substrate 1b are detachably assembled. The first mating surface 14 and the second mating surface 15 are in contact. The first open cavity 11 and the second open cavity 12 are aligned and combined to form a continuous liquid channel. The continuous liquid channel communicates with the ejection section 2 to guide liquid from the continuous liquid channel to the ejection section 2.

[0020] The first substrate 1a and the second substrate 1b are processed and formed separately, and then assembled into a whole to form a modular substrate 1. The continuous liquid channel is connected by the first open cavity 11 and the second open cavity 12 along the splicing direction. Compared with the existing integrated structure substrate, it is easier to process or form the first open cavity 11 and the second open cavity 12 separately, which can meet the processing requirements of complex, specific shapes and sizes of continuous liquid channels, reduce the maintenance difficulty and cost of continuous liquid channels, and the first substrate 1a and the second substrate 1b can be disassembled and assembled, which is conducive to the later recycling of the first substrate 1a and the second substrate 1b.

[0021] The modular substrate 1 of this invention offers high flexibility in material selection and manufacturing process. The first substrate 1a and the second substrate 1b can be made of corrosion-resistant polymer materials (such as photoresist, polyamide, polyimide, polybenzoxazole, etc.), glass, ceramics, metals, metal nitrides, or metal oxides, etc., and manufactured using CNC precision machining, laser cutting, stamping, laser micromachining, and other processing technologies to create precision structures such as the first open cavity 11 and the second open cavity 12. Suitable metals include copper and copper alloys, nickel and nickel-based alloys, aluminum and aluminum alloys, titanium and titanium alloys, cobalt-chromium alloys, stainless steel, etc. Alternatively, the first substrate 1a and the second substrate 1b can be made of semiconductors (such as silicon, germanium, etc.), dielectric materials, metals, metal nitrides, metal oxides, glass, ceramics, polymer materials, etc., and manufactured using semiconductor or micro / nano processing technologies such as photolithography, deep etching, and laser micromachining to create precision structures such as the first open cavity 11 and the second open cavity 12. Appropriate materials are selected based on the performance requirements of the substrate 1, and appropriate processing technologies are chosen based on the materials. During assembly, the first substrate 1a and the second substrate 1b are fixed together by a sealant and a connector to ensure liquid tightness. Preferably, the first substrate 1a and the second substrate 1b can be bonded together using an adhesive material. In specific high-requirement applications, if the materials of the first substrate 1a and the second substrate 1b are compatible, advanced wafer bonding technologies (such as anodic bonding, eutectic bonding, etc.) can be used to form chemical bonds at the connection interface, achieving atomic-level connections, thereby obtaining high structural strength and good chemical compatibility.

[0022] The jetting section 2 is a component from which liquid is ejected from the nozzle 21. As a specific example, the jetting section 2 can be a microporous structure with multiple nozzles 21, without an actuator. In a preferred embodiment, the jetting section 2 can be a nozzle plate structure. The jetting section 2 can be made of corrosion-resistant metal materials such as copper and copper alloys, nickel and nickel-based alloys, aluminum and aluminum alloys, titanium and titanium alloys, cobalt-chromium alloys, and stainless steel, or polymer materials such as polyamide, polyimide, epoxy resin, and photoresist, or ceramics or glass. The nozzles 21 and other precision structures can be fabricated using CNC precision machining, laser drilling, electroforming, stamping, photolithography, etching, etc. Alternatively, the jetting section 2 can be made of materials such as silicon, dielectric materials, metals, metal nitrides, metal oxides, glass, ceramics, and polymer materials, using semiconductor or micro / nano processing technologies such as photolithography, etching, and laser micromachining to fabricate the nozzles 21 and other precision structures. The choice of materials and processing technology is crucial for the jetting section 2. As another specific example, the ejection section 2 can be a microelectronic device manufactured based on semiconductor technology. The ejection section 2 includes a nozzle layer with multiple nozzles 21 and an actuator coupled to the nozzles 21 to eject liquid droplets. The liquid ejection device 100 of this invention may or may not include an actuator, depending on the actual needs. The liquid ejection device 100 and the modular substrate 1 are applicable not only to on-demand inkjet printing but also to other liquid ejection systems such as continuous inkjet printing. The ejection section 2 can be fixed in the mounting cavity 123 mentioned below by processes such as adhesive bonding, glass powder encapsulation, brazing, diffusion bonding, and bonding. Alternatively, the modular substrate 1 may not have a mounting cavity 123, and the ejection section 2 may be connected to the modular substrate 1 by other components such as supports or holders.

[0023] Specifically, to achieve the splicing of the first substrate 1a and the second substrate 1b to form a whole, as an example, such as Figure 6-8As shown, the first substrate 1a has a first connecting hole 16, and the second substrate 1b has a second connecting hole 17 corresponding to the position of the first connecting hole 16. The first connecting hole 16 and the second connecting hole 17 are connected by a connector (not shown). Specifically, the connector can be a detachable fastener such as a bolt, stud, screw, or pin. The second connecting hole 17 is a through hole penetrating the thickness direction of the second substrate 1b. Preferably, there can be multiple first connecting holes 16 evenly distributed on the first mating surface 14, and similarly, there can be multiple second connecting holes 17 evenly distributed on the second mating surface 15. To avoid affecting the formation of the first open cavity 11 on the first substrate 1a and the second open cavity 12 on the second substrate 1b, the first connecting holes 16 and the second connecting holes 17 are correspondingly distributed at the corners of the first mating surface 14 and the second mating surface 15. To improve the connection reliability, the first substrate 1a and the second substrate 1b are fixed by adhesive in addition to being connected by the connector. In addition to the connection methods described above, the first substrate 1a and the second substrate 1b can also be assembled into a whole by detachable connection methods such as magnetic connection, clamping, and snap-fit. The specific connection methods and structures are existing technologies and will not be described in detail here.

[0024] like Figure 1-4 As shown, the nozzle 21 is configured to spray liquid along a first direction z. A plurality of nozzles 21 are arranged along a second direction X and at least in a row. The second direction X intersects the first direction z. The first substrate 1a and the second substrate 1b can be joined together along either the first direction z or the second direction X. Alternatively, the first substrate 1a and the second substrate 1b can be joined together along a third direction y, which intersects the first direction z and the second direction X respectively. When the liquid ejection device 100... Figure 4 The placement can be either vertical (z) as shown in the figure, or the height direction of the assembled substrate 1. The vertical direction includes both vertically downward and inclined downward. For example, if the direction of liquid injection from nozzle 21 is inclined downward, the splicing direction of the first substrate 1a and the second substrate 1b can be vertically downward or inclined downward. The second direction X can be horizontal or the length direction of the assembled substrate 1. The third direction y can be vertical or the width direction of the assembled substrate 1. The splicing direction of the first substrate 1a and the second substrate 1b can be selected and designed according to actual needs. The relationship between the vertical, horizontal, and longitudinal directions and the injection direction of nozzle 21 depends on the placement of the liquid ejection device. The first mating surface 14 and the second mating surface 15 can be a plane, an inclined surface, a stepped surface, or a curved surface with recesses and / or protrusions. To ensure alignment, splicing, and sealing at the joint, the shapes of the first mating surface 14 and the second mating surface 15 are perfectly matched, and they fit together completely.

[0025] Furthermore, such as Figure 4 ,6 As shown in Figure -8, the nozzle 21 is configured to spray liquid along a first direction z. Multiple nozzles 21 are arranged along a second direction x, at least in a single row, intersecting the first direction. The continuous liquid channel includes an inlet channel 111 extending along the first direction z, a storage chamber 13 continuously extending along the second direction x, and a connecting chamber 122, which are sequentially arranged and connected along the first direction z. The connecting chamber 122 communicates with the multiple nozzles 21. The modular substrate 1 is provided with a mounting cavity 123 for mounting the spraying part 2. The mounting cavity 123 is formed in at least one of the first substrate 1a and the second substrate 1b, and communicates with the continuous liquid channel. This configuration allows liquid to flow along the first direction z from the storage chamber 13 through the connecting chamber 122 into the nozzle 21 without any bends, minimizing the liquid flow path on the modular substrate 1, reducing pressure loss, improving liquid flow smoothness, and thus ensuring the spraying performance of the nozzle 21.

[0026] Furthermore, such as Figure 4 As shown, the nozzle 21 is configured to spray liquid along a first direction z. The first substrate 1a and the second substrate 1b are joined together along the first direction z. The second substrate 1b is connected to the spraying part 2. The dimension of the first substrate 1a along the first direction z is larger than the dimension of the second substrate 1b along the first direction z. Without changing the overall height of the assembled substrate 1 and meeting the liquid supply requirements for the nozzle 21, the dimensions of the first substrate 1a and the second substrate 1b are reasonably arranged to make the structure of the assembled substrate 1 more compact. Preferably, to further ensure the overall structural strength of the assembled substrate 1, when the first substrate 1a does not have two connecting parts 18, the outer contour projections of the first substrate 1a and the second substrate 1b in the first direction z completely overlap, differing only in height. In other embodiments, the outer contour projections of the first substrate 1a and the second substrate 1b in the first direction z may not overlap, and their width and length dimensions may differ. Alternatively, the dimension of the first substrate 1a along the first direction z may be less than or equal to the dimension of the second substrate 1b along the first direction z.

[0027] Furthermore, such as Figure 4 , 6As shown in Figure -8, the nozzle 21 is configured to spray liquid along the first direction z. A plurality of nozzles 21 are arranged along the second direction x and at least in a row. The first substrate 1a and the second substrate 1b are spliced ​​together along the first direction z. The first open cavity 11 includes a liquid inlet channel 111 and a first cavity 112 that communicates with the liquid inlet channel 111 and extends continuously along the second direction x. The second open cavity 12 penetrates the second substrate 1b along the first direction z. The second open cavity 12 includes a second cavity 121 that extends along the first direction z and is sequentially connected to a connecting cavity 122 and a mounting cavity 123 for mounting the spraying part 2. The outer contour projections of the first cavity 112 and the second cavity 121 in the first direction z coincide and are connected to each other along the first direction z to form a liquid storage cavity 13. The second cavity 121, the connecting cavity 122, and the mounting cavity 123 extend along the first direction z and are connected in sequence. This arrangement allows the liquid to flow from the storage cavity 13 through the connecting cavity 122 into the nozzle 21 along the first direction z, without any bends. This minimizes the flow path of the liquid on the assembled substrate 1, reduces pressure loss, improves the smoothness of liquid flow, and thus ensures the jetting performance of the nozzle 21. Compared to a one-piece molded storage cavity 13, the storage cavity 13 is formed by connecting the first cavity 112 of the first substrate 1a and the second cavity 121 of the second substrate 1b. The first cavity 112 and the second cavity 121 are processed or formed separately, which facilitates the processing of the storage cavity 13 with the required cross-sectional shape and size, and also facilitates the maintenance of the storage cavity 13.

[0028] Compared to existing methods that rely on additional supports or holders to connect the jetting part 2 to the modular substrate 1, the second substrate 1b provides mounting positioning and support for the jetting part 2. During assembly, the jetting part 2 is directly mounted in the mounting cavity 123 of the second substrate 1b without the need for supports or holders. This eliminates the need for assembling supports or holders, simplifies the assembly process of the jetting part 2, improves assembly efficiency, avoids the waste of production materials caused by the non-recyclability of supports or holders, and saves production costs.

[0029] Furthermore, the liquid storage cavity 13 defines a fluid path, and any cross-sectional profile of the inner wall of the liquid storage cavity 13 is convex, with a minimum radius of curvature greater than zero. The liquid storage cavity 13 has a first end face 131 and a second end face 132 spaced apart, and an extension segment continuously extending from the first end face 131 along a second direction X to the second end face 132. The extension segment is smoothly connected to the first end face 131 and the second end face 132. A smooth connection means that adjacent surfaces are connected by a rounded corner with a constant radius of curvature or by a curved surface with a continuously changing radius of curvature, with no sharp transition areas such as right angles or oblique angles between adjacent surfaces. This design minimizes turbulence generation, suppresses problems such as bubble generation and stagnation that cause poor liquid flow and nozzle 21 blockage, and improves the stability and reliability of nozzle 21 spray. Any cross-section may include a cross section, a longitudinal section, and an oblique section in any direction. The aforementioned convex shape, meaning it does not contain any recesses or indentations towards the center of the cross-sectional profile, excludes any profile with concave portions, such as a gourd shape or any profile with grooves, preventing backflow or low-speed zones in the fluid path due to concave portions. The minimum radius of curvature is greater than zero, meaning there are no sharp points or corners, ensuring the boundary of the entire fluid path is continuous and smooth. The cross-sectional profile may include a smooth closed curve, a closed rounded polygon with rounded corners at all edges, or other smooth convex profiles. As a specific example, such as... Figure 4-5 As shown, any cross-sectional profile of the extension segment is circular, and the first end face 131 and the second end face 132 are hemispherical.

[0030] Furthermore, such as Figure 7 and 8 As shown, the second cavity 121 has a strip-shaped opening 1211 that communicates with the connecting cavity 122. The connection between the second cavity 121 and the connecting cavity 122 is smooth, which helps to improve the smoothness of liquid flow through the connection between the connecting cavity 122 and the second cavity 121 and reduces the generation of air bubbles. Furthermore, as... Figure 2 and 4 As shown, the connection between the liquid inlet channel 111 and the first chamber 112 is a smooth connection, ensuring smooth liquid flow through the connection and reducing bubble generation. Furthermore, as... Figure 2 and 4 As shown, the first substrate 1a is further provided with a drain channel 113 communicating with the first cavity 112. The liquid inlet channel 111 and the drain channel 113 are spaced apart, and the inner wall of the drain channel 113 is smoothly connected to the inner wall of the first cavity 112. This makes the liquid flow more smoothly through the connection between the drain channel 113 and the first cavity 112, reducing the retention of air bubbles and pressure loss at the connection.

[0031] Furthermore, the projections of the center lines of the first substrate 1a, the second substrate 1b, the first cavity 112, the second cavity 121, the connecting cavity 122, and the mounting cavity 123 along the second direction X onto the first direction z coincide. This is beneficial for improving the assembly accuracy of the modular substrate 1 and reducing processing difficulty, and also facilitates smooth liquid flow within the continuous liquid channel.

[0032] Furthermore, such as Figure 1 As shown, the liquid jetting device 100 also includes a housing 3 covering the assembled substrate 1. The housing 3 includes a first housing and a second housing, which are joined together to form a receiving cavity for accommodating the assembled substrate 1. The housing 3 protects and restricts the assembly of the assembled substrate 1, separating the first substrate 1a and the second substrate 1b. The first housing and the second housing can be connected to the assembled substrate 1 via connectors, referring to the connection method of the first substrate 1a and the second substrate 1b. Alternatively, the first housing and the second housing may have connecting portions for connection and fixation between them.

[0033] Example 2 like Figure 2-8 As shown in the figure, this application embodiment also provides a modular substrate 1 for a liquid ejection device 100. The modular substrate 1 includes a first substrate 1a and a second substrate 1b. The first substrate 1a has a first mating surface 14, on which a first open cavity 11 is provided. The second substrate 1b has a second mating surface 15, on which a second open cavity 12 is provided. The first substrate 1a and the second substrate 1b are detachably assembled. The first mating surface 14 and the second mating surface 15 are in contact. The first open cavity 11 and the second open cavity 12 are aligned and combined to form a continuous liquid channel. Compared with the existing integrated substrate structure, the modular substrate 1 facilitates the separate processing or molding of the first open cavity 11 and the second open cavity 12, which can meet the processing requirements of continuous liquid channels with complex, specific shapes and sizes, reduce the maintenance difficulty and cost of continuous liquid channels, and the detachable assembly of the first substrate 1a and the second substrate 1b is beneficial for the later recycling of the first substrate 1a and the second substrate 1b. The specific structure of the assembled substrate 1 and its connection with the spray section 2 are as described in Embodiment 1, and will not be repeated here.

[0034] Although embodiments of the present invention have been shown and described above, they should not be construed as limiting the scope of the claims. The present invention is not limited to the above embodiments, and variations in its specific structure are permitted. All changes made within the scope of the independent claims of the present invention are within the scope of protection of the present invention.

Claims

1. A liquid ejection device with an assembled substrate, characterized in that, include: The jetting section includes multiple nozzles that spray liquid. The assembled substrate includes a first substrate and a second substrate. The first substrate has a first bonding surface, and a first open cavity is provided on the first bonding surface; The second substrate has a second bonding surface, and a second open cavity is provided on the second bonding surface; The first substrate and the second substrate are detachably assembled, the first mating surface is attached to the second mating surface, and the first open cavity and the second open cavity are aligned and combined to form a continuous liquid channel. The continuous liquid channel is connected to the injection section to guide liquid from the continuous liquid channel to the injection section.

2. The liquid ejection device with an assembled substrate as described in claim 1, characterized in that, The first substrate has a first connection hole, and the second substrate has a second connection hole corresponding to the position of the first connection hole. The first connection hole and the second connection hole are connected by a connector.

3. The liquid ejection device with an assembled substrate as described in claim 1, characterized in that, The nozzle is configured to spray liquid along a first direction, the first substrate and the second substrate are joined together along the first direction, the second substrate is connected to the spraying part, and the dimension of the first substrate along the first direction is larger than the dimension of the second substrate along the first direction.

4. The liquid ejection device with an assembled substrate as described in claim 1, characterized in that, The nozzle is configured to spray liquid along a first direction, and a plurality of the nozzles are arranged along a second direction and at least in a row. The first substrate and the second substrate are spliced ​​along the first direction. The first open cavity includes a liquid inlet channel and a first cavity that communicates with the liquid inlet channel and extends continuously along the second direction. The second open cavity extends through the second substrate along the first direction. The second open cavity includes a second cavity, a connecting cavity, and a mounting cavity for mounting the spraying part, which are arranged and connected in sequence along the first direction. The outer contour projections of the first cavity and the second cavity in the first direction coincide and are connected along the first direction to form a liquid storage cavity.

5. The liquid ejection device with an assembled substrate as described in claim 4, characterized in that, The profile of any cross section of the liquid storage cavity is convex, and the minimum radius of curvature of the cross section profile is greater than zero.

6. The liquid ejection device with an assembled substrate as described in claim 4, characterized in that, The second cavity has a strip-shaped opening that communicates with the connecting cavity, and the connection between the second cavity and the connecting cavity is a smooth connection; And / or, the connection between the liquid inlet channel and the first cavity is a smooth connection.

7. The liquid ejection device with an assembled substrate as described in claim 4, characterized in that, The projections of the center lines of the first substrate, the second substrate, the first cavity, the second cavity, the communicating cavity, and the mounting cavity along the second direction coincide in the first direction.

8. The liquid ejection device with an assembled substrate as described in claim 1, characterized in that, The nozzle is configured to spray liquid along a first direction, and a plurality of the nozzles are arranged along a second direction and at least in a row, the second direction intersecting the first direction, the first substrate and the second substrate are spliced ​​along the first direction or the second direction, or the first substrate and the second substrate are spliced ​​along a third direction, the third direction intersecting the first direction and the second direction respectively.

9. The liquid ejection device with an assembled substrate as described in claim 1, characterized in that, The nozzle is configured to spray liquid along a first direction, and a plurality of the nozzles are arranged along a second direction and at least in a row. The continuous liquid channel includes a liquid inlet channel extending along the first direction, a liquid storage chamber extending continuously along the second direction, and a connecting chamber that are sequentially arranged and connected along the first direction. The connecting chamber is connected to the plurality of the nozzles. The modular substrate is provided with a mounting cavity for mounting the spraying part. The mounting cavity is formed in at least one of the first substrate and the second substrate, and the mounting cavity is connected to the continuous liquid channel.

10. An assembled substrate, characterized in that: The assembled substrate is an assembled substrate as described in any one of claims 1-9, comprising a first substrate and a second substrate. The first substrate has a first bonding surface, and a first open cavity is provided on the first bonding surface; The second substrate has a second bonding surface, and a second open cavity is provided on the second bonding surface; The first substrate and the second substrate are detachably assembled, the first mating surface is attached to the second mating surface, and the first open cavity and the second open cavity are aligned and combined to form a continuous liquid channel.

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