Ink droplet observation device

Abstract

An ink droplet observation device comprises a mounting rack which comprises a mounting platform, and the mounting platform is provided with an ink droplet observation light source mounting station, a first mounting groove, an ink droplet observation station, a second mounting groove and an ink droplet observation camera mounting station which are distributed in the first horizontal direction; the nozzle mounting part is arranged on the mounting platform; the ink droplet observation light source and the ink droplet observation camera are respectively mounted on the ink droplet observation light source mounting station and the ink droplet observation camera mounting station; the spray hole detection light source is arranged in the first mounting groove, points to the spray head mounting jig in an inclined state and is used for emitting illumination light to the spray hole; and the spray hole detection camera is arranged in the second mounting groove, points to the spray head mounting jig in an inclined state and is used for shooting a spray hole image. Finally, the flying ink droplet state and the spraying hole state are effectively mastered in the ink-jet printing work, and the overall working state of an ink-jet printing system is comprehensively and systematically mastered.

Description

Technical Field

[0001] This application relates to the field of inkjet printing droplet observation technology, specifically to an ink droplet observation device. Background Technology

[0002] In the field of inkjet printing technology, visual observation of the flying ink droplets ejected from the printhead has become a crucial technical aspect in ensuring print quality, analyzing printhead operating status, and optimizing printing parameters. Real-time monitoring of parameters such as droplet morphology, velocity, and trajectory effectively determines the stability and accuracy of the inkjet process, which is fundamental to ensuring the reliable operation of the printing system.

[0003] Currently, to meet the observation needs of flying ink droplets, a common approach is to place a light source on one side of the nozzle and a high-speed camera on the other, using backlighting to capture instantaneous images of the ink droplets in flight. This technical solution focuses on capturing the flight state of the ink droplets after they leave the nozzle, providing effective image data for ink droplet morphology analysis, and constitutes the current mainstream ink droplet observation system.

[0004] However, existing observation systems have limited functionality. Due to their structural design and singular observation target (i.e., flying ink droplets), they cannot simultaneously acquire real-time status information of the nozzle (i.e., the nozzle exit) within the same observation cycle. The nozzle status (such as orifice wetness, presence of residual ink or blockage, morphological changes, etc.) is also a key indicator directly affecting inkjet quality and analyzing printhead performance degradation. Existing technologies cannot simultaneously observe both flying ink droplets and nozzle status, resulting in limited detection efficiency and making it difficult to comprehensively and systematically grasp the overall operating status of the inkjet printing system in a single operation. Therefore, there is an urgent need for an observation system that can integrate these two functions. Summary of the Invention

[0005] This application provides an ink droplet observation device that can solve the problem in the prior art that the nozzle state and the flying ink droplet state cannot be acquired simultaneously within the same observation period when performing ink droplet observation.

[0006] In a first aspect, embodiments of this application provide an ink droplet observation device, which adopts the following technical solution: The ink droplet observation device includes: The mounting frame includes a mounting platform, on which are arranged a droplet observation light source mounting station, a first mounting slot, a droplet observation station, a second mounting slot, and a droplet observation camera mounting station that are arranged at intervals along a first horizontal direction. The first mounting slot and the second mounting slot both extend along the first horizontal direction. A nozzle mounting section is disposed on the mounting platform and includes a nozzle mounting end that can move at least in the first horizontal direction, the second horizontal direction perpendicular to the first horizontal direction, and the vertical direction. The ink droplet observation light source and the ink droplet observation camera are respectively installed at the ink droplet observation light source installation station and the ink droplet observation camera installation station, and the optical axis of the ink droplet observation light source and the optical axis of the ink droplet observation camera are both arranged along the first horizontal direction. The nozzle detection light source is located in the first mounting groove and below the optical axis of the ink droplet observation light source. It is tilted and rotates towards the printhead mounting fixture with an adjustable tilt angle. Its rotation axis is horizontal and perpendicular to the first horizontal direction, so as to emit illumination light to the nozzle. The nozzle detection camera is disposed in the second mounting slot and below the optical axis of the droplet observation camera. It is tilted and rotates towards the nozzle mounting fixture with an adjustable tilt angle. Its rotation axis is horizontal and perpendicular to the first horizontal direction, so as to capture nozzle images.

[0007] In one embodiment, the light-emitting end of the nozzle detection light source near the printhead mounting plate passes vertically through the first mounting groove and extends between the ink droplet observation light source and the upper surface of the mounting platform. The rotation axis of the nozzle detection light source is located near the light-emitting end to reduce the rotation radius of the light-emitting end.

[0008] In one embodiment, a single-axis moving stage is provided between the nozzle detection camera and the mounting platform. The bottom of the single-axis moving stage is rotatably connected to the mounting platform. The nozzle detection camera is mounted on the single-axis moving stage, and its position can be adjusted in a straight line through the single-axis moving stage, thereby adjusting the distance between the nozzle detection camera and the nozzle.

[0009] In one embodiment, the mounting platform is provided with a first mounting plate for docking the nozzle detection light source and a second mounting plate for docking the nozzle detection camera. The first mounting plate is located on one side of the first mounting groove and its surface is parallel to the first horizontal direction. The second mounting plate is located on one side of the second mounting groove and its surface is parallel to the first horizontal direction.

[0010] In one embodiment, the first mounting plate and the nozzle detection light source, and the second mounting plate and the nozzle detection camera are all rotatably connected by a connecting shaft; The first mounting plate and / or the second mounting plate have an arc-shaped waist hole located on one side of the connecting shaft, and the extension arc of the arc-shaped waist hole is concentric with the connecting shaft; the outer surfaces of the nozzle detection light source and the nozzle detection camera have locking holes corresponding to the arc-shaped waist hole; the arc-shaped waist hole has a locking bolt for unlocking / locking the nozzle detection light source and / or the nozzle detection camera.

[0011] In one embodiment, the ink droplet observation station includes an assembly slot on the mounting platform, an ink collection box for receiving ink droplets ejected by the printhead, and a calibration plate for assisting in the installation and positioning of the ink droplet observation camera; wherein, the ink collection box and the calibration plate are selectively and detachably positioned and installed in a mating position within the assembly slot.

[0012] In one embodiment, the ink droplet observation camera is mounted on the mounting platform via a distance adjustment component, the distance adjustment component being used to adjust the distance between the ink droplet observation camera and the calibration plate mounted on the assembly slot in the first horizontal direction.

[0013] In one embodiment, the ink droplet observation light source installation station includes: A light source mounting base includes a docking part for mounting the ink droplet observation light source, and a mounting base rotatably connected to one end of the docking part, wherein the rotation axis of the docking part is horizontal and perpendicular to the first horizontal direction; An angle adjustment structure is used to support the other end of the docking part, and its height in the vertical direction is adjustable to adjust the tilt angle of the ink droplet observation light source on the docking part relative to the horizontal direction.

[0014] In one embodiment, the angle adjustment structure includes a support base, a support plate extending horizontally is provided on the top of the support base, and one or more adjustment screws are passed through the support plate in a vertical direction. The top of the adjustment screws supports the docking part so as to adjust the tilt angle of the ink droplet observation light source relative to the horizontal direction by adjusting the height of the top of the adjustment screws.

[0015] In one embodiment, the angle adjustment structure further includes a locking nut that passes through the support plate from below and is threaded into the mating portion. The nut of the locking nut is located below the support plate. The angle of the mating portion is fixed by screwing the locking nut until the nut abuts against the support plate.

[0016] The ink droplet observation device provided in this application has the following beneficial effects: The droplet observation device provided in this application, in addition to observing flying ink droplets by arranging ink droplet observation light sources and ink droplet observation cameras on both sides of the printhead mounting section of the mounting frame, also arranges an orifice detection light source between the ink droplet observation light source and the printhead mounting section, and an orifice detection camera between the printhead mounting section and the ink droplet observation camera. The orifice detection light source and the orifice detection camera are arranged at a low, tilted position. This allows for supplementary lighting of the orifices on the bottom surface of the printhead using the orifice detection light source without affecting the observation of flying ink droplets, while the orifice detection camera acquires the orifice image from the other side. This enables orifice status detection, allowing for the monitoring of orifice status information, such as orifice wettability, during inkjet printing. Ultimately, this effectively enables the monitoring of flying ink droplet and orifice status during inkjet printing, achieving a comprehensive and systematic understanding of the overall working status of the inkjet printing system. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the ink droplet observation device of this application; Figure 2 This is a schematic diagram of the structure of the ink droplet observation light source in one embodiment of the ink droplet observation device of this application; Figure 3 This is a schematic diagram of the installation structure of the nozzle detection light source and nozzle detection camera in one embodiment of the ink droplet observation device of this application; Figure 4 This is a schematic diagram of the installation of the calibration plate in one embodiment of the ink droplet observation device of this application; Figure label: 1. Mounting bracket; 10. Mounting platform; 11. Ink droplet observation light source mounting station; 110. Light source mounting base; 1101. Connecting part; 1102. Mounting base; 111. Angle adjustment structure; 1110. Bearing base; 1111. Bearing plate; 1112. Adjusting screw; 1113. Locking nut; 12. First mounting slot; 13. Ink droplet observation station; 130. Assembly slot; 131. Ink collection box; 132. Calibration plate; 14. Second mounting slot; 15. Ink droplet observation camera mounting station; 16. First mounting plate; 17. Second mounting plate; 18. Connecting shaft; 19. Arc-shaped waist hole; 2. Nozzle mounting section; 3. Light source for observing ink droplets; 4. Ink droplet observation camera; 41. Distance adjustment component; 5. Nozzle detection light source; 6. Nozzle detection camera; 60. Single-axis moving stage. Detailed Implementation

[0018] To enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present application, and not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present application.

[0019] The ink droplet observation device provided in this application is characterized by the following: In addition to observing flying ink droplets by arranging ink droplet observation light sources 3 and ink droplet observation cameras 4 on both sides of the printhead mounting portion 2 of the mounting frame 1, it further utilizes a nozzle detection light source 5 arranged between the ink droplet observation light source 3 and the printhead mounting portion 2, and a nozzle detection camera 6 arranged between the printhead mounting portion 2 and the ink droplet observation camera 4. The nozzle detection light source 5 and the nozzle detection camera 6 are arranged at a low, inclined position. This allows for supplementary lighting of the nozzles on the bottom surface of the printhead using the nozzle detection light source 5 without affecting the observation of flying ink droplets, while the nozzle detection camera 6 acquires the nozzle image from the other side. This enables nozzle status detection, allowing for the monitoring of nozzle status information, such as nozzle wettability, during inkjet printing. Ultimately, this effectively enables the monitoring of flying ink droplet and nozzle status during inkjet printing, achieving a comprehensive and systematic understanding of the overall working status of the inkjet printing system.

[0020] To make the objectives, technical solutions, and advantages of this application clearer, the embodiments of this application will be described in further detail below with reference to the accompanying drawings.

[0021] In one aspect, embodiments of this application provide an ink droplet observation device.

[0022] In one embodiment, reference is made to Figure 1 , Figure 1 This is a schematic diagram of the overall structure of the ink droplet observation device provided in this application. The ink droplet observation device includes a mounting frame 1, a nozzle mounting part 2, an ink droplet observation light source 3, an ink droplet observation camera 4, a nozzle detection light source 5, and a nozzle detection camera 6.

[0023] Specifically, the mounting frame 1 includes a mounting platform 10, on which are arranged at intervals along a first horizontal direction: a mounting station 11 for the ink droplet observation light source 3, a first mounting slot 12, an ink droplet observation station 13, a second mounting slot 14, and a mounting station 15 for the ink droplet observation camera 4. The first mounting slot 12 and the second mounting slot 14 both extend along the first horizontal direction. For ease of understanding in conjunction with the accompanying drawings, the first horizontal direction in this embodiment is the x-direction in the coordinate system shown in the figures. Specifically, the mounting station 11 for the ink droplet observation light source 3 is used for installation; the first mounting slot 12 is used for installation of the nozzle detection light source 5; the ink droplet observation station 13 is used for installation of the ink collection box 131 that receives flying ink droplets; the second mounting slot 14 is used for installation of the nozzle detection camera 6; and the mounting station 15 for the ink droplet observation camera 4 is used for installation of the ink droplet observation camera 4.

[0024] The printhead mounting section 2 is disposed on the mounting platform 10, and includes a printhead mounting end that can move at least in the first horizontal direction, the second horizontal direction perpendicular to the first horizontal direction, and the vertical direction; wherein, the second horizontal direction is the y-direction of the directional coordinate system shown in the figure. In this embodiment, the printhead mounting section 2 is preferably a three-axis moving stage that can move in three directions, ensuring that the printhead mounting end can move in the first horizontal direction, the second horizontal direction, and the vertical direction, thereby enabling the printhead mounted on the printhead mounting end to be positioned in three directions, so that the printhead can eventually be moved above the ink droplet observation station 13.

[0025] The optical axes of both the ink droplet observation light source 3 and the ink droplet observation camera 4 are arranged along the first horizontal direction, so as to enable the observation of flying ink droplets dripping from the nozzle.

[0026] Furthermore, referring to Figure 2 To ensure that the optical axis of the ink droplet observation light source 3 remains consistent with the first horizontal direction during installation, in some embodiments, the ink droplet observation light source 3 installation station 11 is provided with a light source mounting base 110 and an angle adjustment structure 111. The light source mounting base 110 includes a docking part 1101 for mounting the ink droplet observation light source 3, and a mounting base 1102 rotatably connected to one end of the docking part 1101. The rotation axis of the docking part 1101 is horizontal and perpendicular to the first horizontal direction. The angle adjustment structure 111 supports the other end of the docking part 1101, and its height in the vertical direction is adjustable to adjust the tilt angle of the ink droplet observation light source 3 on the docking part 1101 relative to the horizontal direction.

[0027] Specifically, the docking part 1101 has mating holes at both ends for assembling and fixing the ink droplet observation light source 3. One end of the docking part 1101 is rotatably mounted on the top of the mounting base 1102 via a rotating shaft, with the rotation axis being horizontal. The angle adjustment structure 111 includes a bearing base 1110 disposed at the other end of the docking part 1101. The top of the bearing base 1110 is provided with a bearing plate 1111 extending in the horizontal direction. One or more adjusting screws 1112 are threaded through the bearing plate 1111 in the vertical direction. The top of the adjusting screw 1112 supports the docking part 1101, so that the height of the end of the docking part 1101 can be adjusted by rotating the height of the top of the adjusting screw 1112 extending out of the bearing plate 1111, thereby adjusting the tilt angle of the ink droplet observation light source 3 relative to the horizontal direction.

[0028] Furthermore, to ensure that the ink droplet observation light source 3 can be stably maintained at a suitable tilt angle, the angle adjustment structure 111 also includes a locking nut 1113. The locking nut 1113 passes through the support plate 1111 from below and is threaded into the docking part 1101. The nut of the locking nut 1113 is located below the support plate 1111. The angle of the docking part 1101 is fixed by screwing the locking nut 1113 until the nut abuts against the support plate 1111.

[0029] Reference Figure 1 The nozzle detection light source 5 is located in the first mounting groove 12 and below the optical axis of the ink droplet observation light source 3. It is tilted and rotates towards the printhead mounting fixture with an adjustable tilt angle. Its rotation axis is horizontal and perpendicular to the first horizontal direction to emit illumination light to the nozzle. By rotating the nozzle detection light source 5, the operator can adjust the tilt angle of the nozzle detection light source 5 as needed to make it smoothly align with the target nozzle on the bottom surface of the printhead.

[0030] Meanwhile, the light-emitting end of the nozzle detection light source 5, near the printhead mounting plate, vertically passes through the first mounting groove 12 and extends between the ink droplet observation light source 3 and the upper surface of the mounting platform 10. The rotation axis of the nozzle detection light source 5 is located near the light-emitting end to reduce its rotation radius. This configuration places the nozzle detection light source 5 below the optical axis of the ink droplet observation light source 3, preventing interference with the observation path of flying ink droplets and ensuring successful ink droplet observation. Furthermore, because the rotation axis of the nozzle detection light source 5 is near its light-emitting end, this end has a smaller rotation radius. Consequently, when adjusting the tilt angle of the nozzle detection light source 5, the amount of rotation can be smaller, achieving more precise alignment between the light source and the nozzle.

[0031] On the other hand, the nozzle detection camera 6 is disposed in the second mounting slot 14 and below the optical axis of the ink droplet observation camera 4. It is tilted and rotates towards the nozzle mounting fixture with an adjustable tilt angle. Its rotation axis is horizontal and perpendicular to the first horizontal direction, so as to capture nozzle images.

[0032] Furthermore, referring to Figure 3 A single-axis moving stage 60 is also provided between the nozzle detection camera 6 and the mounting platform 10. The bottom of the single-axis moving stage 60 is rotatably connected to the mounting platform 10. The nozzle detection camera 6 is mounted on the single-axis moving stage 60. The position of the nozzle can be adjusted in a straight line through the single-axis moving stage 60, thereby adjusting the distance between the nozzle detection camera 6 and the nozzle.

[0033] In this embodiment, to facilitate the installation of the nozzle detection light source 5 and the nozzle detection camera 6, the mounting platform 10 is provided with a first mounting plate 16 for docking the nozzle detection light source 5 and a second mounting plate 17 for docking the nozzle detection camera 6. The first mounting plate 16 is located on one side of the first mounting groove 12 and its surface is parallel to the first horizontal direction. The second mounting plate 17 is located on one side of the second mounting groove 14 and its surface is parallel to the first horizontal direction. Specifically, to allow the rotation axis of the nozzle detection light source 5 to be closer to its light-emitting end, the first mounting plate 16 is located on the upper surface of the mounting platform 10, while the second mounting plate 17 is located on the lower surface of the mounting platform 10.

[0034] Furthermore, referring to Figure 3 The first mounting plate 16 and the nozzle detection light source 5, and the second mounting plate 17 and the nozzle detection camera 6 are all rotatably connected via a connecting shaft 18. To enable movable positioning of the nozzle detection light source 5 and the nozzle detection camera 6, both the first mounting plate 16 and the second mounting plate 17 have an arc-shaped waist hole 19 extending through them, located on one side of the connecting shaft 18. The arc of the arc-shaped waist hole 19 is concentric with the connecting shaft 18. Simultaneously, the nozzle detection light source 5 and the nozzle detection camera 6 are rotatably connected via a connecting shaft 18. The outer surface of the measuring camera 6 is provided with a locking hole corresponding to the arc-shaped waist hole 19. When a locking bolt (not shown in the figure) passes through the arc-shaped waist hole 19 and is threaded into the locking hole, the angle of the nozzle detection light source 5 and the nozzle detection camera 6 can be fixed when the nut of the locking bolt abuts against the first mounting plate 16 or the second mounting plate 17. Conversely, when the locking bolt is released, the nozzle detection light source 5 and the nozzle detection camera 6 can be unlocked and their angles can be adjusted within the allowable angle range of the arc-shaped waist hole 19.

[0035] Furthermore, referring to Figure 4In some embodiments, the droplet observation station 13 includes an assembly slot 130 on the mounting platform 10, an ink collection box 131 for receiving ink droplets ejected by the printhead, and a calibration plate 132 for assisting in the installation and positioning of the droplet observation camera 4. The ink collection box 131 and the calibration plate 132 are optionally and detachably positioned in a mating position within the assembly slot 130. This configuration allows the calibration plate 132 to be installed in the assembly slot 130 during the installation phase of the droplet observation equipment. The calibration plate 132 assists in the movement and alignment of the printhead, the alignment of the optical axes of the droplet observation light source 3 and the droplet observation camera 4. After completing their respective alignment tasks, the calibration plate 132 can be replaced with the ink collection box 131, enabling a faster and more efficient completion of the pre-use preparation and debugging work for this equipment.

[0036] In addition, refer to Figure 1 To facilitate the initial focusing of the droplet observation camera 4 in conjunction with the calibration plate 132, a distance adjustment component 41 is provided between the droplet observation camera 4 and the mounting platform 10. The droplet observation camera 4 is mounted on the mounting platform 10 via the distance adjustment component 41. The distance adjustment component 41 is used to adjust the distance between the droplet observation camera 4 and the calibration plate 132 mounted on the assembly slot 130 in the first horizontal direction. This allows the droplet observation camera 4 to adjust its focusing distance in the first horizontal direction via the distance adjustment component 41. In this embodiment, the distance adjustment component 41 uses a single-axis moving platform. After ensuring that the single-axis moving platform is in the first horizontal direction and aligned with the calibration plate 132, the droplet observation camera 4 mounted on it can be aligned with the droplet observation station 13, and the focusing distance can be adjusted subsequently via the single-axis moving platform.

[0037] Furthermore, in some embodiments, the ink droplet observation light source 3 includes a fiber optic light source emitting element and a collimating lens connected to the end of the fiber optic light source emitting element. The collimating lens ensures that the light emitted by the ink droplet observation light source 3 at the emitting end has higher straightness, thereby ensuring more accurate observation of flying ink droplets. Simultaneously, the illumination mode of the fiber optic light source emitting element is preferably a constant-on mode, ensuring better brightness in the captured images of flying ink droplets even with smaller droplet sizes. Furthermore, since the emitting element uses a cold-light fiber optic light source, the uniformity of illumination received by the flying ink droplets during observation is better, ensuring the image quality of the camera during ink droplet observation. In this embodiment, the color of the fiber optic light source is preferably red, avoiding the use of a white light source that is closer to UV light, thereby preventing problems such as ink droplet solidification that alter the properties of the ink droplets.

[0038] In the description of this application, it should be noted that the terms "upper," "lower," etc., indicating the orientation or positional relationship are based on the orientation or positional relationship 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, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Unless otherwise expressly specified and limited, the terms "installed," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0039] It should be noted that in this application, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0040] The above description is merely a specific embodiment of this application, enabling those skilled in the art to understand or implement this 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 this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features claimed herein.

Claims

1. An ink droplet observation device, characterized in that, It includes: The mounting frame includes a mounting platform, on which are arranged a droplet observation light source mounting station, a first mounting slot, a droplet observation station, a second mounting slot, and a droplet observation camera mounting station that are arranged at intervals along a first horizontal direction. The first mounting slot and the second mounting slot both extend along the first horizontal direction. A nozzle mounting section is disposed on the mounting platform and includes a nozzle mounting end that can move at least in the first horizontal direction, the second horizontal direction perpendicular to the first horizontal direction, and the vertical direction. The ink droplet observation light source and the ink droplet observation camera are respectively installed at the ink droplet observation light source installation station and the ink droplet observation camera installation station, and the optical axis of the ink droplet observation light source and the optical axis of the ink droplet observation camera are both arranged along the first horizontal direction. The nozzle detection light source is located in the first mounting groove and below the optical axis of the ink droplet observation light source. It is tilted and rotates towards the printhead mounting fixture with an adjustable tilt angle. Its rotation axis is horizontal and perpendicular to the first horizontal direction, so as to emit illumination light to the nozzle. The nozzle detection camera is disposed in the second mounting slot and below the optical axis of the droplet observation camera. It is tilted and rotates towards the nozzle mounting fixture with an adjustable tilt angle. Its rotation axis is horizontal and perpendicular to the first horizontal direction, so as to capture nozzle images.

2. The ink droplet observation device as described in claim 1, characterized in that, The light-emitting end of the nozzle detection light source near the nozzle mounting plate passes vertically through the first mounting groove and extends between the ink droplet observation light source and the upper surface of the mounting platform. The rotation axis of the nozzle detection light source is located near the light-emitting end to reduce the rotation radius of the light-emitting end.

3. The ink droplet observation device as described in claim 1, characterized in that, A single-axis moving stage is also provided between the nozzle detection camera and the mounting platform. The bottom of the single-axis moving stage is rotatably connected to the mounting platform. The nozzle detection camera is mounted on the single-axis moving stage so that its position can be adjusted in a straight line through the single-axis moving stage, thereby adjusting the distance between the nozzle detection camera and the nozzle.

4. The ink droplet observation device as described in claim 1, characterized in that, The mounting platform is provided with a first mounting plate for docking the nozzle detection light source and a second mounting plate for docking the nozzle detection camera. The first mounting plate is located on one side of the first mounting groove and its surface is parallel to the first horizontal direction. The second mounting plate is located on one side of the second mounting groove and its surface is parallel to the first horizontal direction.

5. The ink droplet observation device as described in claim 4, characterized in that, The first mounting plate and the nozzle detection light source, and the second mounting plate and the nozzle detection camera are all rotatably connected by connecting shafts; The first mounting plate and the second mounting plate are provided with an arc-shaped waist hole located on one side of the connecting shaft, and the extension arc of the arc-shaped waist hole is concentric with the connecting shaft; the outer surfaces of the nozzle detection light source and the nozzle detection camera are provided with locking holes corresponding to the arc-shaped waist hole; the arc-shaped waist hole is provided with a locking bolt for unlocking / locking the nozzle detection light source and / or the nozzle detection camera.

6. The ink droplet observation device as described in claim 1, characterized in that, The ink droplet observation station includes an assembly slot on the mounting platform, an ink collection box for receiving ink droplets ejected by the printhead, and a calibration plate for assisting in the installation and positioning of the ink droplet observation camera; wherein, the ink collection box and the calibration plate are selectively and detachably positioned and installed in a mating position within the assembly slot.

7. The ink droplet observation device as described in claim 6, characterized in that, The ink droplet observation camera is mounted on the mounting platform via a distance adjustment component, which is used to adjust the distance between the ink droplet observation camera and the calibration plate mounted on the assembly slot in the first horizontal direction.

8. The ink droplet observation device as described in claim 1, characterized in that, The installation station for the ink droplet observation light source includes: A light source mounting base includes a docking part for mounting the ink droplet observation light source, and a mounting base rotatably connected to one end of the docking part, wherein the rotation axis of the docking part is horizontal and perpendicular to the first horizontal direction; An angle adjustment structure is used to support the other end of the docking part, and its height in the vertical direction is adjustable to adjust the tilt angle of the ink droplet observation light source on the docking part relative to the horizontal direction.

9. The ink droplet observation device as described in claim 8, characterized in that, The angle adjustment structure includes a support base, a support plate extending horizontally on the top of the support base, and one or more adjustment screws passing through the support plate in a vertical direction. The top of the adjustment screws supports the docking part, so as to adjust the tilt angle of the ink droplet observation light source relative to the horizontal direction by adjusting the height of the top of the adjustment screws.

10. The ink droplet observation device as described in claim 8, characterized in that, The angle adjustment structure also includes a locking nut, which passes through the support plate from below and is threaded into the mating part. The nut of the locking nut is located below the support plate. The angle of the mating part is fixed by screwing the locking nut until the nut abuts against the support plate.

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