Positioning and installation structure and method for printer printheads with built-in plastic positioning holes

Abstract

This invention relates to a positioning and mounting structure and method for printer printheads with built-in plastic positioning holes. The structure includes a printhead mounting plate, positioning pins, and a metal adhesive layer. The printhead mounting plate has multiple printhead mounting seats. This invention uses a metal adhesive layer between the positioning pins and the mounting holes, employing a chemical reaction with minimal or no heat generation to fix the pins to the printhead mounting seats. Compared to traditional riveting or welding, this method is less prone to localized stress deformation, facilitating rapid and precise positioning of the positioning pins and printheads. It also reduces manufacturing costs and significantly lowers the processing cost of the printhead mounting plate. Strict control of the mounting hole's dimensional tolerances is not required; conventional processing methods can ensure positioning accuracy between printheads. Experiments show that this solution can guarantee positioning accuracy between printheads within 1-2 micrometers, and sometimes even less than 1 micrometer.

Description

Technical Field

[0001] This invention relates to the technical field of inkjet printers, and more specifically to a positioning and mounting structure and method for a printer printhead with a built-in plastic positioning hole. Background Technology

[0002] Inkjet printers spray colored liquid ink into fine particles through nozzles onto printing paper, and are widely used in the market for their vibrant printing results. Piezoelectric printhead printers, in particular, feature durable printheads and are highly adaptable to various ink types, making them widely used in different fields, especially in wide-format and specialty material printing. With the increasing prevalence of wide-format printer printhead assemblies, aluminum alloy carriage frames are often used to increase load flexibility and reduce overall weight. These frames include the carriage back plate (mounted on the guide rail slider), carriage side plates, and carriage bottom plate (printhead mounting plate). However, achieving low-cost, rapid, and accurate positioning of multiple printheads within a wide-format printer printhead assembly in the forward, backward, left, and right directions remains a key area of ​​ongoing research.

[0003] Currently, there are two common methods for positioning printheads: 1) Adding a slave plate to the printhead mounting plate. First, the printhead is fixed to the slave plate, and then the slave plate is mounted on the printhead mounting plate. Using the horizontal screw-pull structure between the printhead mounting plate and the slave plate, combined with a test line, the positioning of each printhead in the front-back, left-right directions is manually adjusted. However, the accuracy of manual thread adjustment is only 5-10 microns, and the manual adjustment workload is extremely large. Later, software adjustments may be required, and the machining cost of the slave plate is increased. 2) Another method relies purely on the machining accuracy of the printhead mounting plate. Most Japanese-made printers have two built-in plastic positioning holes at the bottom of the printhead. The printhead is directly positioned on the printhead mounting plate according to its own parameters. Machining locating pins (i.e., CNC milling a locating pin on a plane of the printhead mounting plate) is costly and slow. Precise positioning between printheads doesn't require machining the plate itself. While aluminum alloy machining can achieve a positional and shape accuracy of 1-2 micrometers, production costs are already high. Furthermore, it hinders the anodizing process of the aluminum alloy base plate (a necessary step for aluminum alloy carriage frames; non-oxidized aluminum alloy base plates have the following drawbacks: difficulty in cleaning ink contamination, and insufficient surface hardness, reducing lifespan and making them prone to damage). Before the anodizing process, acid pickling is necessary, which corrodes the metal surface, easily causing new deviations in the shape and position of the locating pins (potentially a change of 10 micrometers), severely affecting the precise positioning between printheads. Therefore, we propose a positioning and mounting structure and method for printer printheads with built-in plastic positioning holes to solve all the problems of low printhead positioning accuracy, slow positioning speed, and high machining costs. Summary of the Invention

[0004] This invention provides a positioning and installation structure and method for printer printheads with built-in plastic positioning holes, which solves the technical problems of low positioning accuracy, slow positioning speed and high processing cost among multiple printheads mentioned above.

[0005] One of the objectives of this invention is to provide a positioning and mounting structure for printer printheads with built-in plastic positioning holes, the technical solution of which is as follows:

[0006] A positioning and mounting structure for a printer printhead with a built-in plastic positioning hole includes a printhead mounting plate, a positioning pin, and a metal adhesive layer. The printhead mounting plate has multiple printhead mounting seats, each of which has at least one mounting hole for mounting the positioning pin. Each positioning pin is bonded and fixed in its mounting hole by the metal adhesive layer, which is sandwiched between the positioning pin and the mounting hole. The diameter of the positioning pin is larger than the diameter of the plastic positioning hole on the printer printhead. When the printer printhead is mounted on the positioning and mounting structure, the positioning pin is used to make an interference fit with the plastic positioning hole.

[0007] Furthermore, each of the nozzle mounting bases is provided with two mounting holes.

[0008] Furthermore, two mounting holes are respectively provided on both sides of each of the nozzle mounting bases.

[0009] Furthermore, the metal adhesive layer is made of a resin composition or a solvent-volatile adhesive or a chemical agent for chemical anchoring.

[0010] Furthermore, the metal bonding layer is filled with an epoxy resin composition or an acrylic resin composition or a filler adhesive triggered by oxygen, water, or light.

[0011] One of the beneficial effects of this invention is that by providing a metal adhesive layer between the locating pin and the mounting hole, the pin is fixed to the nozzle mounting base through a chemical reaction with virtually no or minimal heat generation. Compared to traditional riveting or welding, this method is less prone to localized stress deformation, making it more conducive to rapid and precise positioning of the locating pins. The locating pin is used to position the nozzle, thus ultimately facilitating rapid and precise positioning of the nozzles. Furthermore, it is low-cost and very convenient to manufacture; it significantly reduces manufacturing difficulty and the cost of the nozzle mounting plate. Strict control of the form and position tolerances of the mounting holes is almost unnecessary; conventional manufacturing methods can ensure the positioning accuracy between the nozzles. The locating pin has not undergone acid pickling or oxidation, so its dimensions are not affected. The locating pin is used for an interference fit with the plastic locating hole. This facilitates nozzle fixation, and because the locating hole on the nozzle is made of plastic with slight elasticity, the interference fit further enhances the alignment of the locating pin and the plastic locating hole.

[0012] The second objective of this invention is to provide a fixture for manufacturing positioning and mounting structures, the technical solution of which is as follows:

[0013] The fixture is provided with multiple clamping structures for holding the positioning pins, and the positioning pins are inserted into the mounting holes of the nozzle mounting base through each clamping structure.

[0014] Furthermore, each of the clamping structures is provided with at least one positioning pin clamping hole, and a positioning pin fixing cavity is provided next to the positioning pin clamping hole. A spring or rubber is provided in the positioning pin fixing cavity to fix the positioning pin.

[0015] Furthermore, each of the clamping structures is provided with at least one positioning pin clamping hole, and one side of the circumferential wall of each positioning pin clamping hole is provided with a threaded hole that penetrates the clamping structure. A bolt is provided in the threaded hole for fixing the positioning pin.

[0016] Furthermore, the fixture is made of metal.

[0017] The second beneficial effect of this invention is that, since the fixture is only a tool used to manufacture the positioning and installation structure, it does not require pickling and oxidation and will not be affected by them. The fixture is equipped with a clamping mechanism to achieve positioning, so it is relatively easy to accurately position the positioning pins on the fixture, which greatly improves the positioning accuracy between the nozzles and reduces the positioning difficulty.

[0018] A third objective of this invention is to provide a positioning and installation method for printer nozzles with built-in plastic positioning holes. By using a positioning and installation structure, the plastic positioning holes of the printer nozzle and the corresponding positioning pins are aligned and inserted one by one to achieve an interference fit.

[0019] The third objective of this invention is that by using an interference fit between the positioning pin and the plastic positioning hole, it is convenient to fix the printhead. On the other hand, since the positioning hole on the printhead is made of plastic and has slight elasticity, the interference fit is more conducive to achieving zero-center alignment between the positioning pin and the plastic positioning hole. The positioning and installation of the printer printhead on the positioning pin is very convenient and fast.

[0020] The fourth objective of this invention is to provide a method for manufacturing a positioning and mounting structure, comprising the following steps:

[0021] 1) Fix the required number of positioning pins into the positioning pin clamping holes of the fixture's clamping mechanism;

[0022] 2) Place the clamping mechanism on the ground or frame with the protruding end of the positioning pin facing upwards;

[0023] 3) The nozzle mounting plate has mounting holes. Place the nozzle mounting plate with the side for mounting the nozzle facing down, align each mounting hole with the protruding end of each positioning pin and insert them. There is a gap between each mounting hole and each positioning pin. At this time, the nozzle mounting plate rests on the fixture.

[0024] 4) Fill the gap between the mounting hole and the locating pin with metal adhesive, and after it cools and solidifies, a metal adhesive layer is formed, so that the locating pin is bonded and fixed in the mounting hole.

[0025] 5) Release all the locking mechanisms from all the positioning pins, and then move the nozzle mounting plate upward from the fixture to obtain the finished product.

[0026] The beneficial effect of the fourth objective of this invention is:

[0027] 1. The fixture is reusable, and by relying on the fixture, the positioning accuracy between each positioning pin is improved, resulting in more stable quality;

[0028] 2. By providing a metal bonding layer between the locating pin and the mounting hole, the pin is fixed to the nozzle mounting base through a chemical reaction with virtually no or minimal heat generation. Compared to traditional riveting or welding, this method is less prone to localized stress deformation, facilitating rapid and precise positioning of the locating pins. Since the locating pins are used to position the nozzles, this method ultimately improves the rapid and precise positioning of each nozzle. Furthermore, it is low-cost and convenient to manufacture; it significantly reduces manufacturing difficulty and the cost of the nozzle mounting plate. Strict control of the form and position tolerances of the mounting holes is almost unnecessary; conventional processing can ensure the positioning accuracy between nozzles. The locating pins are not subjected to acid pickling or oxidation processes, so their dimensions remain unchanged.

[0029] The positioning pin described in section 3 is used to make an interference fit with the plastic positioning hole. On the one hand, it is convenient to fix the nozzle. On the other hand, since the positioning hole on the nozzle is made of plastic and has slight elasticity, the interference fit is more conducive to achieving a zero-center alignment between the positioning pin and the plastic positioning hole.

[0030] The above description is merely an overview of the technical solution of the present invention. In order to better understand the technical means of the present invention and to implement it according to the contents of the specification, the preferred embodiments of the present invention are described in detail below with reference to the accompanying drawings. Specific embodiments of the present invention are given in detail below with reference to the accompanying drawings. Attached Figure Description

[0031] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings:

[0032] Figure 1 This is a three-dimensional structural diagram of a positioning and mounting structure for a printer nozzle with a built-in plastic positioning hole, provided in an embodiment of the present invention.

[0033] Figure 2 for Figure 1 A front view of a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole is provided.

[0034] Figure 3 for Figure 1 An exploded view of a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole is provided.

[0035] Figure 4 for Figure 3 A front view of a fixture (with positioning pin) in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole, as shown in Embodiment 1;

[0036] Figure 5 for Figure 3 A top view of a fixture (with positioning pins) in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole;

[0037] Figure 6 for Figure 5 Enlarged view of point A of the provided fixture (with locating pin);

[0038] Figure 7 for Figure 4 A perspective view of a fixture (without positioning pins) in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole, as shown in Embodiment 1;

[0039] Figure 8 for Figure 3 A perspective view of a fixture (without positioning pins) in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole, as shown in Embodiment 2;

[0040] Figure 9 for Figure 3 A top view of a printhead mounting plate in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole;

[0041] Figure 10 for Figure 3 A bottom view of the printhead mounting plate in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole;

[0042] Figure 11 for Figure 3 A perspective view of the printhead mounting plate from a downward angle in a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole.

[0043] The attached diagram lists the components represented by each number as follows:

[0044] 1. Nozzle mounting plate; 11. Locating pin; 111. Metal adhesive layer; 112. Mounting hole; 113. Nozzle mounting base; 1131. Nozzle nozzle; 2. Fixture; 21. Clamping structure; 211. Locating pin clamping hole; 212. Locating pin fixing cavity; 213. Threaded hole. Detailed Implementation

[0045] The following is in conjunction with the appendix Figure 1-11 The principles and features of the present invention are described below. The examples given are for illustrative purposes only and are not intended to limit the scope of the invention. The invention is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of the invention will become clearer from the following description and claims. It should be noted that the drawings are in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of the invention.

[0046] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0047] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0048] like Figure 1-11 As shown, the present invention provides a fixture for manufacturing a positioning and mounting structure. The fixture 2 is provided with a plurality of clamping structures 21 for clamping the positioning pin 11, and the positioning pin 11 is inserted into the mounting hole 112 of the nozzle mounting base 113 through each of the clamping structures 21.

[0049] The beneficial effects of the above embodiments are as follows: Because the fixture is only a tool used to manufacture the positioning and mounting structure, not a product, it does not need to undergo pickling and oxidation processes (because weight reduction is not a concern), and its dimensional accuracy is not affected. The fixture is equipped with a clamping mechanism to achieve positioning pin positioning, so precise positioning between the positioning pins on the fixture is relatively easy to achieve (affected only by machining and assembly errors). The positioning pins also do not need to undergo pickling and oxidation processes, which greatly improves the positioning accuracy between the printheads and reduces the positioning difficulty, thus improving the final printing effect. Experiments show that using the solution in this invention, the positioning accuracy between the printheads can be guaranteed to be within 1-2 microns, and sometimes even within 1 micron.

[0050] It should be emphasized that the positioning accuracy between the positioning pins in this invention is achieved by relying on the precision of the fixture.

[0051] Preferred, such as Figure 4-7 As shown, each clamping structure 21 is provided with at least one positioning pin clamping hole 211, and a positioning pin fixing cavity 212 is provided next to the positioning pin clamping hole 211. A spring or rubber is provided inside the positioning pin fixing cavity 212 to fix the positioning pin 11. Through the spring or rubber provided in the positioning pin fixing cavity 212, one side of the positioning pin is pressed tightly against the inner wall of one side of the positioning pin clamping hole 211. It is only necessary to ensure the positional and dimensional accuracy of each positioning pin clamping hole 211 (it is very easy to ensure accuracy by using the inner hole of one side of each clamping hole as a reference for positioning processing). No pickling or oxidation process is required, and the size of the clamping hole is not affected by the surface pickling and oxidation process. The positioning accuracy between the positioning pins is more easily guaranteed. Since the spring and rubber have a certain elasticity, it is also convenient to pull out the finished product directly. Of course, in this embodiment, based on actual application (in the prior art, each side of the bottom of the printer nozzle is provided with a plastic positioning hole), the number of positioning pin clamping holes 211 provided on each clamping structure 21 is two.

[0052] Preferred, such as Figure 8 As shown, each of the clamping structures 21 is provided with at least one positioning pin clamping hole 211. One side of the circumferential wall of each positioning pin clamping hole 211 is provided with a threaded hole 213 that penetrates the clamping structure 21. The threaded hole 213 is provided with a bolt for fixing the positioning pin 11. The installation is relatively convenient. When the positioning pin 11 is unlocked, it is only necessary to unscrew the bolt.

[0053] Preferably, to improve the positioning accuracy between the clamping holes and the dimensional accuracy of the clamping holes, the fixture 2 is made of metal because metal has high rigidity and strength. Specifically, the fixture can be made of stainless steel or iron, as stainless steel or iron has high rigidity and strength, making it easier to ensure the positioning accuracy between the clamping holes and the dimensional accuracy of the clamping holes.

[0054] This invention provides a positioning and mounting structure for a printer printhead with a built-in plastic positioning hole, including a printhead mounting plate 1, a positioning pin 11, and a metal adhesive layer 111. The printhead mounting plate 1 has multiple printhead mounting seats 113, each printhead mounting seat 113 having at least one mounting hole 112 for mounting the positioning pin 11. Each positioning pin 11 is bonded and fixed in each mounting hole 112 by the metal adhesive layer 111, and the metal adhesive layer 111 is sandwiched between the positioning pin 11 and the mounting hole 112. The diameter of the positioning pin 11 is larger than the diameter of the plastic positioning hole of the printer printhead. When the printer printhead is mounted on the positioning and mounting structure, the positioning pin 11 is used to make an interference fit with the plastic positioning hole, that is, to press it in firmly.

[0055] This embodiment uses a metal adhesive layer 111 between the positioning pin 11 and the mounting hole 112 to fix the pin to the nozzle mounting base 113 through a chemical reaction with virtually no or minimal heat generation. Compared to traditional riveting or welding, this method is less prone to localized stress deformation and facilitates rapid and precise positioning of the positioning pins. The positioning pins are used to position the nozzles, thus further enhancing the rapid and precise positioning of the nozzles. Furthermore, this method is low-cost and convenient, significantly reducing processing difficulty and the cost of the nozzle mounting plate. Strict control of the form and position tolerances of the mounting hole 112 is almost unnecessary; conventional processing can ensure the positioning accuracy of the nozzles. The positioning pins do not require acid pickling or oxidation processes, and their dimensions remain unchanged. The positioning pin 11 is used for an interference fit with the plastic positioning hole. This facilitates nozzle fixation, and because the positioning hole on the nozzle is made of plastic with slight elasticity, the interference fit further facilitates a zero-center alignment between the positioning pin and the plastic positioning hole.

[0056] It should be noted that the metal bonding layer 111 is formed by filling the gap between the bonding positioning pin and the mounting hole on the nozzle mounting plate with a chemical cold-curing substance. Preferably, a chemical anchoring agent is used, which expands minimally and is released from both sides of the gap, having little impact on the positioning accuracy between the positioning pins. After solidification, it has high hardness and is not easily deformed. The chemical agent is common knowledge in the field, and its specific components will not be described in detail.

[0057] Furthermore, the metal bonding layer 111 is formed through a chemical reaction, generating virtually no heat (or very little). This method of fixing the positioning pin avoids stress between the nozzle mount 113 and the positioning pin, thus ensuring no spatial positional error when the positioning pin is removed from the fixture. However, if traditional riveting or welding were used, stress would be directly generated between the positioning pin and the nozzle mount. Once the positioning pin is removed from the fixture, it would spring back and deform due to the stress, making high-precision spatial positioning impossible.

[0058] Compared to welding and riveting, so-called cold curing refers to overcoming the localized stress changes in the material, not that even a slight temperature rise due to the chemical reaction is unacceptable. Localized temperature rises leading to significant stress changes are not within the scope of this case; a slight temperature rise, such as 30-40 degrees Celsius, is acceptable. In other words, a slight temperature rise needs to be ensured during cold curing. This process is common knowledge among those skilled in the art, so it will not be elaborated upon here.

[0059] It is understood that in this invention, "adhesion" and "bonding" have the same meaning.

[0060] Specifically, to ensure positioning accuracy, the positioning pin can be made of stainless steel or aluminum alloy with high rigidity and strength.

[0061] Preferred, such as Figure 1-3 As shown in Figures 9-11, in order to ensure the stability of the nozzle installation, each nozzle mounting base 113 is provided with two mounting holes 112. The two mounting holes 112 are respectively provided on both sides of each nozzle mounting base 113.

[0062] Preferably, the metal adhesive layer 111 is a resin composition or a solvent-volatile adhesive.

[0063] Preferably, the metal adhesive layer 111 is made of an epoxy resin composition filled adhesive, an acrylic resin composition filled adhesive, or a filled adhesive triggered by oxygen, water, or light. However, during the curing process, there should not be an excessively significant temperature rise, which could lead to significant changes in local stress in the fixed material and ultimately cause positioning deviation of the locating pin. The selection of materials must be based on this premise.

[0064] The present invention also provides a positioning and installation method for a printer nozzle with a built-in plastic positioning hole. The method uses a positioning and installation structure to align and insert the plastic positioning hole of the printer nozzle with the corresponding positioning pin 11 to achieve an interference fit.

[0065] The beneficial effects of the above-mentioned positioning and installation method are as follows: by interfering with the positioning pin 11 and the plastic positioning hole, it is convenient to fix the printhead. On the other hand, since the positioning hole on the printhead is made of plastic and has slight elasticity, the interference fit is more conducive to achieving zero center alignment between the positioning pin and the plastic positioning hole. The positioning and installation of the printer printhead on the positioning pin is very convenient and fast.

[0066] This invention provides a method for manufacturing a positioning and mounting structure, comprising the following steps:

[0067] 1) Fix the required number of positioning pins 11 into the positioning pin clamping holes 211 of the clamping mechanism of the fixture 2;

[0068] 2) Place the clamping mechanism on the ground or frame with the protruding end of the positioning pin 11 facing upwards;

[0069] 3) The nozzle mounting plate 1 is provided with mounting holes 112. The side of the nozzle mounting plate 1 used for mounting the nozzle is facing down, and each mounting hole 112 is aligned with the protruding end of each positioning pin 11 and inserted. A gap is reserved between each mounting hole 112 and each positioning pin 11. At this time, the nozzle mounting plate 1 is placed on top of the fixture 2.

[0070] 4) Fill the gap between the mounting hole 112 and the positioning pin 11 with metal adhesive, and after it is cured, form a metal adhesive layer 111, so that the positioning pin 11 is bonded and fixed in the mounting hole 112.

[0071] 5) Release the locking of all clamping mechanisms on all positioning pins 111, and then move the nozzle mounting plate 1 upward from the fixture 2 to obtain the finished product.

[0072] The beneficial effects of the above method are:

[0073] 1. The fixture is reusable, and by relying on the fixture, the positioning accuracy between each positioning pin is improved, resulting in more stable quality;

[0074] 2. By providing a metal adhesive layer 111 between the positioning pin 11 and the mounting hole 112, the pin is fixed by a chemical reaction with virtually no or minimal heat generation. This method secures the positioning pin 11 to the nozzle mounting base 113. Compared to traditional riveting or welding, this method is less prone to localized stress deformation, making it more conducive to rapid and precise positioning of the positioning pins. The positioning pins are used to position the nozzles, thus ultimately facilitating rapid and precise positioning of the nozzles. Moreover, the processing cost is low and very convenient; it significantly reduces processing difficulty and the processing cost of the nozzle mounting plate. There is almost no need to strictly control the form and position tolerances of the mounting hole 112; conventional processing can ensure the positioning accuracy between the nozzles. The positioning pins have not undergone acid pickling and oxidation processes, so their dimensions will not be affected.

[0075] The positioning pin 11 described above is used to make an interference fit with the plastic positioning hole. On the one hand, it is convenient to fix the nozzle. On the other hand, since the positioning hole on the nozzle is made of plastic and has slight elasticity, the interference fit is more conducive to achieving the zero-center alignment between the positioning pin and the plastic positioning hole.

[0076] In summary, the advantages of this solution are: 1. By separating the locating pin 11 and the printhead mounting plate 1 first, and then performing acid pickling and oxidation treatment on the surface of the printhead mounting plate 1 (aluminum part) separately, the dimensional tolerances of the locating pin are not affected by the surface acid pickling and oxidation process; 2. It significantly reduces the processing difficulty and the processing cost of the printhead mounting plate, and there is almost no need to strictly control the dimensional tolerances, so conventional processing is sufficient; 3. The printing effect is better and the quality is more stable. Once the fixture dimensions are determined, it is only affected by the assembly tolerances.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Those skilled in the art can readily implement the present invention based on the accompanying drawings and the above description. However, any modifications, alterations, or variations made by those skilled in the art without departing from the scope of the present invention, utilizing the disclosed technical content, are equivalent embodiments of the present invention. Furthermore, any modifications, alterations, or variations made to the above embodiments based on the essential technology of the present invention are still within the protection scope of the present invention.

Claims

1. A positioning and mounting structure for a printer printhead with a built-in plastic positioning hole, comprising a printhead mounting plate (1), characterized in that, It also includes a positioning pin (11) and a metal adhesive layer (111). The printhead mounting plate (1) is provided with a plurality of printhead mounting seats (113). Each printhead mounting seat (113) is provided with at least one mounting hole (112) for mounting the positioning pin (11). Each positioning pin (11) is bonded and fixed in each mounting hole (112) by the metal adhesive layer (111). The metal adhesive layer (111) is sandwiched between the positioning pin (11) and the mounting hole (112). The diameter of the positioning pin (11) is larger than the diameter of the plastic positioning hole of the printer printhead. When the printer nozzle is installed on the positioning mounting structure, the positioning pin (11) is used to make an interference fit with the plastic positioning hole. Each nozzle mounting seat (113) is provided with two mounting holes (112). The two mounting holes (112) are respectively located on both sides of each nozzle mounting seat (113). The metal adhesive layer (111) is made of resin composition or solvent-volatile glue or chemical agent for chemical anchoring. The metal adhesive layer (111) is made of epoxy resin composition filled adhesive or acrylic resin composition filled adhesive or filled adhesive triggered by oxygen, water or light.

2. A positioning and installation method for printer printheads with built-in plastic positioning holes, characterized in that, Using any of the positioning and mounting structures described in claim 1, the plastic positioning holes of the printer nozzle and the corresponding positioning pins (11) are aligned and inserted one by one to complete the interference fit.

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