Ink droplet characteristic detection device

Abstract

The ink droplet characteristic detection device comprises a spray head assembly, and the spray head assembly comprises a spray head capable of moving to a preset position in the horizontal direction and spraying ink downwards; the ink receiving assembly comprises an ink disc, an ink receiving box and an anti-splashing structure. The ink disc collects ink sprayed out of the spray head. A containing cavity is formed in the ink receiving box, and the ink disc is provided with a connecting groove communicating with the containing cavity. The anti-splashing structure is arranged on the ink disc and provided with a first flow channel and a second flow channel which are communicated, a first opening in the top of the first flow channel is located below a spray head which moves to a preset position and prepares to spray ink, a second opening in the bottom of the second flow channel is communicated with the connecting groove, and the second flow channel is inclined by a preset angle relative to the first flow channel; the prism assembly comprises a reflecting prism; the camera assembly comprises a camera, and the camera is arranged on the other side of the ink disc relative to the reflecting prism; the moving mechanism is connected with the camera. The ink is effectively prevented from being splashed on the lens of the camera, so that the clearness of the lens of the camera is ensured.

Description

Technical Field

[0001] The present invention relates to the field of printing devices, and in particular to an ink droplet characteristic detection device. Background Art

[0002] During the printing process, the inkjet inspection device needs to take photos of the ink droplet jetting speed, angle, and volume of the nozzle to determine whether the nozzle is blocked or has other abnormal conditions.

[0003] Currently, ink droplets are sprayed directly onto the ink tray through a nozzle, and the working condition of the nozzle is inferred from the shape of the ink droplets captured by the camera.

[0004] However, when the nozzle sprays ink, the ink sprayed downward has a relatively high spraying speed. When the ink contacts the ink tray, it will splash around. Some ink will be sprayed on the mirror of the camera. After a long period of detection operation, the ink on the camera accumulates more and more, thereby reducing the light entering the camera, which in turn affects the camera's normal imaging of the ink and reduces the accuracy of detection. Summary of the invention

[0005] The object of the present invention is to provide an ink droplet characteristic detection device, which can better prevent ink from splashing on a camera lens.

[0006] The embodiment of the present invention is achieved as follows:

[0007] The present application provides an ink droplet characteristic detection device, comprising:

[0008] A nozzle assembly, comprising a nozzle that can be moved to a preset position in a horizontal direction and spray ink downward;

[0009] The ink receiving assembly comprises an ink tray, an ink receiving box and an anti-splashing structure, wherein the ink tray is used to collect ink sprayed by the nozzle moved to a preset position; the ink tray is arranged in the ink receiving box, the interior of the ink receiving box has a receiving cavity for receiving ink droplets sprayed by the nozzle, and the bottom of the ink tray is provided with a connecting groove connected with the receiving cavity; the anti-splashing structure is arranged on the ink tray, and has a first flow channel and a second flow channel connected thereto, a first opening at the top of the first flow channel is located below the nozzle moved to a preset position and ready to spray ink, and the size of the first opening is larger than the size of the bottom opening of the nozzle, the second opening at the bottom of the second flow channel is connected with the connecting groove, and the two ends of the first flow channel extend up and down in a vertical direction, and the second flow channel is arranged at a preset angle relative to the first flow channel;

[0010] A prism assembly, comprising a reflecting prism disposed on one side of the ink tray, for reflecting light from the falling ink;

[0011] A camera assembly, comprising a movably arranged camera, wherein the camera is arranged on the other side of the ink tray relative to the reflecting prism, and the light reflected by the reflecting prism enters the interior of the camera to form an image in the camera;

[0012] The moving mechanism is connected to the camera and is used to drive the camera to move.

[0013] In a possible implementation, the anti-splashing structure includes: a first ink receiving strip and a second ink receiving strip that are respectively butt-jointed in the up-and-down directions;

[0014] The first flow channel is disposed inside the first ink receiving strip, and the first opening of the first flow channel is located on the top surface of the first ink receiving strip;

[0015] A portion of the second ink receiving strip extends into the interior of the first ink receiving strip and the second flow channel is formed therebetween, and the second opening of the second flow channel is located on the bottom surface of the second ink receiving strip.

[0016] In a possible implementation manner, the first ink receiving strip comprises a first main body, a third channel is disposed inside the first main body, and at least one first inclined surface inclined along the preset angle is disposed inside the third channel;

[0017] The top surface of the second ink receiving strip is provided with a protrusion extending into the third channel, and the protrusion is matched with a second inclined surface relative to the third channel, and the second inclined surface is inclined along the preset angle.

[0018] In a possible implementation manner, the bottom surface of the first main body is arranged parallel to the top surface of the second ink receiving strip, and the height of the protrusion extending in the vertical direction is the same as the depth of the third channel.

[0019] In a possible implementation manner, the inner side surface of the third channel facing away from the first inclined surface is arranged in the vertical direction, and the outer side surface of the protrusion facing away from the second inclined surface is arranged in the vertical direction.

[0020] In a possible implementation manner, a top surface of the protrusion is provided with a plane parallel to a top surface of the third channel.

[0021] In a possible implementation, the first ink receiving strip further includes a boss portion, the boss portion protrudes at a preset height relative to the top surface of the first main body portion, the first flow channel is arranged in the boss portion, and the reflective prism and the camera are respectively arranged on two sides of the boss portion.

[0022] In a possible implementation manner, the third opening of the connecting groove is larger than the second opening.

[0023] In a possible implementation manner, a corrosion-resistant coating is provided on the inner side wall of the first flow channel, the inner side wall of the third channel, and the outer side wall of the protrusion.

[0024] The beneficial effects of the embodiments of the present invention are:

[0025] The first flow channel and the second flow channel are set to guide the ink. At the same time, the second flow channel is set at an angle, so that the sprayed ink first contacts the inner walls of the first flow channel and the second flow channel, and finally converges into the storage cavity and the ink box, effectively avoiding the ink from splashing onto the camera lens, thereby ensuring the clarity of the camera lens. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0027] Figure 1 This is an overall structural diagram of an ink droplet characteristic detection device according to an embodiment of the present invention;

[0028] Figure 2 It is a structural diagram of an ink receiving component in an ink droplet characteristic detection device according to an embodiment of the present invention;

[0029] Figure 3 In the embodiment of the present invention Figure 2 Cross-sectional view in

[0030] Figure 4 For the embodiment of the present invention Figure 3 A cross-sectional view of the first ink receiving strip;

[0031] Figure 5 For the embodiment of the present invention Figure 3 A cross-sectional view of the second ink strip in FIG.

[0032] Icons: 1. Ink tray; 11. Connecting groove; 2. Anti-splash structure; 21. First flow channel; 22. Second flow channel; 3. First ink receiving strip; 31. First main body; 311. Third channel; 312. First slope; 32. Boss; 4. Second ink receiving strip; 41. Raised portion; 411. Second slope; 5. Nozzle assembly; 51. Nozzle; 6. Reflecting prism; 7. Camera assembly; 8. Moving mechanism; 9. Ink receiving assembly. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0036] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, or the positions or positional relationships in which the product of the invention is usually placed when in use. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0037] In addition, the terms "horizontal", "vertical" and the like do not mean that the components are required to be absolutely horizontal or suspended, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0039] refer to Figures 1 to 5The present application provides an ink droplet characteristic detection device, comprising: a nozzle assembly 5, an ink receiving assembly 9, a prism assembly, a camera assembly 7 and a moving mechanism 8. The nozzle assembly 5 comprises a nozzle 51 which can be moved horizontally to a preset position and spray ink downwards. The number of nozzles 51 can be selected according to the format of the product to be sprayed and inspected. When the format of the product is narrow, the spray inspection of the product can be completed by setting one nozzle 51. When the format of the product is wide, the spray inspection of the product can be satisfied by setting multiple nozzles 51 in parallel.

[0040] The ink receiving assembly 9 includes an ink tray 1, an ink receiving box, and an anti-splashing structure 2. The ink tray 1 is used to collect the ink sprayed by the nozzle 51 that moves to the preset position to prevent the sprayed ink from leaking and polluting the surrounding working environment. The ink tray 1 is arranged in the ink receiving box. The interior of the ink receiving box has a receiving cavity for receiving the ink droplets sprayed by the nozzle 51. The bottom of the ink tray 1 is provided with a connecting groove 11 connected to the receiving cavity. The ink sprayed downward can be collected in the receiving cavity through the connecting groove 11. The anti-splashing structure 2 is arranged on the ink tray 1, and has a first flow channel 21 and a second flow channel 22 that are connected. The first opening at the top of the first flow channel 21 is located below the nozzle 51 that moves to the preset position and is ready to spray ink, and the size of the first opening is larger than the size of the bottom opening of the nozzle 51. The ink sprayed downward can smoothly enter the first flow channel 21 through the first opening directly below it. The second opening at the bottom of the second flow channel 22 is connected to the connecting groove 11, and the two ends of the first flow channel 21 extend up and down in the vertical direction. The second flow channel 22 is inclined at a preset angle relative to the first flow channel 21. The ink entering the first flow channel 21 flows into the second flow channel 22 under the action of its own gravity, and is collected into the receiving cavity through the connecting groove 11, and finally flows into the ink receiving box. The set first flow channel 21 and the second flow channel 22 play a role in guiding flow. In addition, the second flow channel 22 is inclined, and the sprayed ink first contacts the inner walls of the first flow channel 21 and the second flow channel 22, and finally gathers into the receiving cavity and the ink receiving box, which effectively avoids the splashing of ink.

[0041] The prism assembly includes a reflective prism 6 disposed on one side of the ink tray 1, and the reflective prism 6 can reflect the light of the falling ink. The camera assembly 7 includes a movably arranged camera, which is disposed on the other side of the ink tray 1 relative to the reflective prism 6. The light reflected by the reflective prism 6 enters the interior of the camera, thereby forming an image in the camera. When the nozzle 51 sprays ink droplets, the camera quickly takes a series of photos, and the spraying speed, angle and volume of the ink droplets are calculated by processing the image analysis algorithm of these photos. For example, the spraying speed of the ink droplets is determined by analyzing the position change of the ink droplets in adjacent photos, the spraying angle is determined according to the inclination of the ink droplet flight trajectory, and the volume is estimated according to the image size of the ink droplets in the photo and the related proportional relationship. Once an abnormality is detected in the nozzle 51, such as an abnormally low ink droplet spraying speed, an excessively large spraying angle deviation or a volume that obviously does not meet the standard, the alarm device in the spray inspection unit will immediately sound an alarm and feed back the abnormal information to the printing control system. The printing control system can take corresponding measures based on this information, such as pausing printing, cleaning or maintaining the nozzle 51, to avoid printing quality problems caused by abnormalities in the nozzle 51, and ensure the smooth progress of printing and high-quality output of printed products.

[0042] The moving mechanism 8 is connected to the camera and can drive the camera to move in a straight line. The distance between the camera and the reflecting prism 6 can be adjusted through the moving mechanism 8, and then the imaging focal length of the camera can be adjusted, thereby improving the clarity of the imaging, and being able to accurately determine the properties of the ink sprayed by the nozzle 51, thereby understanding the specific working conditions of the nozzle 51.

[0043] In general, the first flow channel 21 and the second flow channel 22 are set to guide the ink. At the same time, the second flow channel 22 is set at an angle, and the sprayed ink first contacts the inner walls of the first flow channel 21 and the second flow channel 22, and finally converges into the storage cavity and the ink box, which effectively avoids the ink from splashing onto the camera lens, thereby ensuring the clarity of the camera lens.

[0044] In some embodiments, the anti-splash structure 2 includes: a first ink receiving strip 3 and a second ink receiving strip 4 that are respectively connected and arranged in a vertical direction. A first flow channel 21 is arranged inside the first ink receiving strip 3, and the first opening of the first flow channel 21 is located on the top surface of the first ink receiving strip 3. A portion of the second ink receiving strip 4 extends into the interior of the first ink receiving strip 3 and a second flow channel 22 is formed between the two, and the second opening of the second flow channel 22 is located on the bottom surface of the second ink receiving strip 4. The anti-splash structure 2 can be an integrated structure or a split structure, but considering that the first flow channel 21 and the second flow channel 22 inside the integrated anti-splash structure 2 are difficult to process, generally the first flow channel 21 and the second flow channel 22 can be obtained by injection molding, and the processing cost is high. In fact, a split anti-splash structure 2 is usually used, that is, the anti-splash structure 2 includes: a first ink receiving strip 3 and a second ink receiving strip 4 that are respectively connected and arranged in a vertical direction, and a vertically extending channel is directly opened inside the first ink receiving strip 3 to obtain the first flow channel 21. At the same time, the top portion of the second ink receiving strip 4 is extended into the interior of the first ink receiving strip 3, thereby forming a second flow channel 22 between the two, and a second opening of the second flow channel 22 is processed at the bottom of the second ink receiving strip 4, thereby reducing the processing difficulty of the first flow channel 21 and the second flow channel 22 and reducing the processing cost.

[0045] In some embodiments, the first ink receiving strip 3 includes a first main body 31, a third channel 311 is disposed inside the first main body 31, and at least one first inclined surface 312 inclined along a preset angle is disposed inside the third channel 311. A protrusion 41 extending into the third channel 311 is disposed on the top surface of the second ink receiving strip 4, and the protrusion 41 is matched with a second inclined surface 411 relative to the third channel 311, and the second inclined surface 411 is inclined along a preset angle. A second flow channel 22 with a smaller space is formed between the protrusion 41 extending into the third channel 311 and the inner wall of the third channel 311, and the first inclined surface 312 and the second inclined surface 411 have the same inclination direction, so that the entire second flow channel 22 is inclined as a whole, which can achieve the drainage of ink and better avoid the splashing of ink.

[0046] In some embodiments, the bottom surface of the first main body 31 is arranged parallel to the top surface of the second ink receiving strip 4, and the height of the protrusion 41 extending in the vertical direction is the same as the depth of the third channel 311, the plane where the top surface of the protrusion 41 is located is parallel to the plane where the top surface of the third channel 311 is located, and the gap between the two is small, thereby achieving a sealed connection between the protrusion 41 and the top surface of the third channel 311, thereby avoiding the formation of a gap that allows ink to flow in.

[0047] In some embodiments, the inner side surface of the third channel 311 facing away from the first inclined surface 312 is arranged in the vertical direction, the outer side surface of the protrusion 41 facing away from the second inclined surface 411 is arranged in the vertical direction, and the top surface of the protrusion 41 is provided with a plane parallel to the top surface of the third channel 311, thereby achieving a sealed connection between the outer side surface of the protrusion 41 and the inner side surface of the third channel 311, thereby avoiding the formation of a gap that allows ink to flow in.

[0048] In some embodiments, the first ink receiving strip 3 also includes a boss portion 32, which protrudes at a preset height relative to the top surface of the first main body portion 31, and the first flow channel 21 is arranged in the boss portion 32. The reflective prism and the camera are respectively arranged on both sides of the boss portion 32. The boss portion 32 protrudes at a preset height relative to the top surface of the first main body portion 31, which can improve the imaging clarity of the camera.

[0049] In some embodiments, the third opening of the connecting groove 11 is larger than the second opening, so that the ink can be collected quickly.

[0050] In some embodiments, a corrosion-resistant coating is provided on the inner wall of the first flow channel 21, the inner wall of the third channel 311 and the outer wall of the protrusion 41, which can prevent the corrosion of the inner walls of the first flow channel 21 and the second flow channel 22 and extend the service life of the splash-proof structure 2.

[0051] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An ink droplet characteristic detection device, characterized in that: include: A nozzle assembly, comprising a nozzle that can be moved to a preset position in a horizontal direction and spray ink downward; The ink receiving assembly comprises an ink tray, an ink receiving box and an anti-splashing structure, wherein the ink tray is used to collect ink sprayed by the nozzle moved to a preset position; the ink tray is arranged in the ink receiving box, the interior of the ink receiving box has a receiving cavity for receiving ink droplets sprayed by the nozzle, and the bottom of the ink tray is provided with a connecting groove connected with the receiving cavity; the anti-splashing structure is arranged on the ink tray, and has a first flow channel and a second flow channel connected thereto, a first opening at the top of the first flow channel is located below the nozzle moved to a preset position and ready to spray ink, and the size of the first opening is larger than the size of the bottom opening of the nozzle, the second opening at the bottom of the second flow channel is connected with the connecting groove, and the two ends of the first flow channel extend up and down in a vertical direction, and the second flow channel is arranged at a preset angle relative to the first flow channel; A prism assembly, comprising a reflecting prism disposed on one side of the ink tray, for reflecting light from the falling ink; A camera assembly, comprising a movably arranged camera, wherein the camera is arranged on the other side of the ink tray relative to the reflecting prism, and the light reflected by the reflecting prism enters the interior of the camera to form an image in the camera; The moving mechanism is connected to the camera and is used to drive the camera to move.

2. The ink droplet characteristic detection device according to claim 1, characterized in that: The anti-splashing structure comprises: a first ink receiving strip and a second ink receiving strip which are respectively connected in the up-down direction; The first flow channel is disposed inside the first ink receiving strip, and the first opening of the first flow channel is located on the top surface of the first ink receiving strip; A portion of the second ink receiving strip extends into the interior of the first ink receiving strip and the second flow channel is formed therebetween, and the second opening of the second flow channel is located on the bottom surface of the second ink receiving strip.

3. The ink droplet characteristic detection device according to claim 2, characterized in that: The first ink receiving strip comprises a first main body, a third channel is arranged inside the first main body, and at least one first inclined surface inclined along the preset angle is arranged inside the third channel; The top surface of the second ink receiving strip is provided with a protrusion extending into the third channel, and the protrusion is matched with a second inclined surface relative to the third channel, and the second inclined surface is inclined along the preset angle.

4. The ink droplet characteristic detection device according to claim 3, characterized in that: The bottom surface of the first main body is arranged in parallel with the top surface of the second ink receiving strip, and the height of the protrusion extending in the vertical direction is the same as the depth of the third channel.

5. The ink droplet characteristic detection device according to claim 3, characterized in that: The inner side surface of the third channel facing away from the first inclined surface is arranged along the vertical direction, and the outer side surface of the protrusion facing away from the second inclined surface is arranged along the vertical direction.

6. The ink droplet characteristic detection device according to claim 3, characterized in that: The top surface of the protrusion is provided with a plane parallel to the top surface of the third channel.

7. The ink droplet characteristic detection device according to claim 3, characterized in that: The first ink receiving strip also includes a boss portion, which protrudes at a preset height relative to the top surface of the first main body portion. The first flow channel is arranged in the boss portion, and the reflective prism and the camera are respectively arranged on both sides of the boss portion.

8. The ink droplet characteristic detection device according to claim 1, characterized in that: The third opening of the connecting groove is larger than the second opening.

9. The ink droplet characteristic detection device according to claim 3, characterized in that: A corrosion-resistant coating is provided on the inner side wall of the first flow channel, the inner side wall of the third channel and the outer side wall of the protrusion.

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